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 *);
141 static int fcoe_validate_vport_create(struct fc_vport *);
143 static struct libfc_function_template fcoe_libfc_fcn_templ = {
144 .frame_send = fcoe_xmit,
145 .ddp_setup = fcoe_ddp_setup,
146 .ddp_done = fcoe_ddp_done,
147 .ddp_target = fcoe_ddp_target,
148 .elsct_send = fcoe_elsct_send,
149 .get_lesb = fcoe_get_lesb,
150 .lport_set_port_id = fcoe_set_port_id,
153 struct fc_function_template fcoe_nport_fc_functions = {
154 .show_host_node_name = 1,
155 .show_host_port_name = 1,
156 .show_host_supported_classes = 1,
157 .show_host_supported_fc4s = 1,
158 .show_host_active_fc4s = 1,
159 .show_host_maxframe_size = 1,
161 .show_host_port_id = 1,
162 .show_host_supported_speeds = 1,
163 .get_host_speed = fc_get_host_speed,
164 .show_host_speed = 1,
165 .show_host_port_type = 1,
166 .get_host_port_state = fc_get_host_port_state,
167 .show_host_port_state = 1,
168 .show_host_symbolic_name = 1,
170 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
171 .show_rport_maxframe_size = 1,
172 .show_rport_supported_classes = 1,
174 .show_host_fabric_name = 1,
175 .show_starget_node_name = 1,
176 .show_starget_port_name = 1,
177 .show_starget_port_id = 1,
178 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
179 .show_rport_dev_loss_tmo = 1,
180 .get_fc_host_stats = fc_get_host_stats,
181 .issue_fc_host_lip = fcoe_reset,
183 .terminate_rport_io = fc_rport_terminate_io,
185 .vport_create = fcoe_vport_create,
186 .vport_delete = fcoe_vport_destroy,
187 .vport_disable = fcoe_vport_disable,
188 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
190 .bsg_request = fc_lport_bsg_request,
193 struct fc_function_template fcoe_vport_fc_functions = {
194 .show_host_node_name = 1,
195 .show_host_port_name = 1,
196 .show_host_supported_classes = 1,
197 .show_host_supported_fc4s = 1,
198 .show_host_active_fc4s = 1,
199 .show_host_maxframe_size = 1,
201 .show_host_port_id = 1,
202 .show_host_supported_speeds = 1,
203 .get_host_speed = fc_get_host_speed,
204 .show_host_speed = 1,
205 .show_host_port_type = 1,
206 .get_host_port_state = fc_get_host_port_state,
207 .show_host_port_state = 1,
208 .show_host_symbolic_name = 1,
210 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
211 .show_rport_maxframe_size = 1,
212 .show_rport_supported_classes = 1,
214 .show_host_fabric_name = 1,
215 .show_starget_node_name = 1,
216 .show_starget_port_name = 1,
217 .show_starget_port_id = 1,
218 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
219 .show_rport_dev_loss_tmo = 1,
220 .get_fc_host_stats = fc_get_host_stats,
221 .issue_fc_host_lip = fcoe_reset,
223 .terminate_rport_io = fc_rport_terminate_io,
225 .bsg_request = fc_lport_bsg_request,
228 static struct scsi_host_template fcoe_shost_template = {
229 .module = THIS_MODULE,
230 .name = "FCoE Driver",
231 .proc_name = FCOE_NAME,
232 .queuecommand = fc_queuecommand,
233 .eh_abort_handler = fc_eh_abort,
234 .eh_device_reset_handler = fc_eh_device_reset,
235 .eh_host_reset_handler = fc_eh_host_reset,
236 .slave_alloc = fc_slave_alloc,
237 .change_queue_depth = fc_change_queue_depth,
238 .change_queue_type = fc_change_queue_type,
241 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
242 .use_clustering = ENABLE_CLUSTERING,
243 .sg_tablesize = SG_ALL,
244 .max_sectors = 0xffff,
248 * fcoe_interface_setup() - Setup a FCoE interface
249 * @fcoe: The new FCoE interface
250 * @netdev: The net device that the fcoe interface is on
252 * Returns : 0 for success
253 * Locking: must be called with the RTNL mutex held
255 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
256 struct net_device *netdev)
258 struct fcoe_ctlr *fip = &fcoe->ctlr;
259 struct netdev_hw_addr *ha;
260 struct net_device *real_dev;
261 u8 flogi_maddr[ETH_ALEN];
262 const struct net_device_ops *ops;
264 fcoe->netdev = netdev;
266 /* Let LLD initialize for FCoE */
267 ops = netdev->netdev_ops;
268 if (ops->ndo_fcoe_enable) {
269 if (ops->ndo_fcoe_enable(netdev))
270 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
271 " specific feature for LLD.\n");
274 /* Do not support for bonding device */
275 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
276 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
280 /* look for SAN MAC address, if multiple SAN MACs exist, only
281 * use the first one for SPMA */
282 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
283 vlan_dev_real_dev(netdev) : netdev;
285 for_each_dev_addr(real_dev, ha) {
286 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
287 (is_valid_ether_addr(ha->addr))) {
288 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
295 /* setup Source Mac Address */
297 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
300 * Add FCoE MAC address as second unicast MAC address
301 * or enter promiscuous mode if not capable of listening
302 * for multiple unicast MACs.
304 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
305 dev_uc_add(netdev, flogi_maddr);
307 dev_uc_add(netdev, fip->ctl_src_addr);
308 if (fip->mode == FIP_MODE_VN2VN) {
309 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
310 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
312 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
315 * setup the receive function from ethernet driver
316 * on the ethertype for the given device
318 fcoe->fcoe_packet_type.func = fcoe_rcv;
319 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
320 fcoe->fcoe_packet_type.dev = netdev;
321 dev_add_pack(&fcoe->fcoe_packet_type);
323 fcoe->fip_packet_type.func = fcoe_fip_recv;
324 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
325 fcoe->fip_packet_type.dev = netdev;
326 dev_add_pack(&fcoe->fip_packet_type);
332 * fcoe_interface_create() - Create a FCoE interface on a net device
333 * @netdev: The net device to create the FCoE interface on
334 * @fip_mode: The mode to use for FIP
336 * Returns: pointer to a struct fcoe_interface or NULL on error
338 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
339 enum fip_state fip_mode)
341 struct fcoe_interface *fcoe;
344 if (!try_module_get(THIS_MODULE)) {
345 FCOE_NETDEV_DBG(netdev,
346 "Could not get a reference to the module\n");
347 fcoe = ERR_PTR(-EBUSY);
351 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
353 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
354 fcoe = ERR_PTR(-ENOMEM);
359 kref_init(&fcoe->kref);
364 fcoe_ctlr_init(&fcoe->ctlr, fip_mode);
365 fcoe->ctlr.send = fcoe_fip_send;
366 fcoe->ctlr.update_mac = fcoe_update_src_mac;
367 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
369 err = fcoe_interface_setup(fcoe, netdev);
371 fcoe_ctlr_destroy(&fcoe->ctlr);
381 module_put(THIS_MODULE);
387 * fcoe_interface_release() - fcoe_port kref release function
388 * @kref: Embedded reference count in an fcoe_interface struct
390 static void fcoe_interface_release(struct kref *kref)
392 struct fcoe_interface *fcoe;
393 struct net_device *netdev;
395 fcoe = container_of(kref, struct fcoe_interface, kref);
396 netdev = fcoe->netdev;
397 /* tear-down the FCoE controller */
398 fcoe_ctlr_destroy(&fcoe->ctlr);
401 module_put(THIS_MODULE);
405 * fcoe_interface_get() - Get a reference to a FCoE interface
406 * @fcoe: The FCoE interface to be held
408 static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
410 kref_get(&fcoe->kref);
414 * fcoe_interface_put() - Put a reference to a FCoE interface
415 * @fcoe: The FCoE interface to be released
417 static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
419 kref_put(&fcoe->kref, fcoe_interface_release);
423 * fcoe_interface_cleanup() - Clean up a FCoE interface
424 * @fcoe: The FCoE interface to be cleaned up
426 * Caller must be holding the RTNL mutex
428 void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
430 struct net_device *netdev = fcoe->netdev;
431 struct fcoe_ctlr *fip = &fcoe->ctlr;
432 u8 flogi_maddr[ETH_ALEN];
433 const struct net_device_ops *ops;
438 * Don't listen for Ethernet packets anymore.
439 * synchronize_net() ensures that the packet handlers are not running
440 * on another CPU. dev_remove_pack() would do that, this calls the
441 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
443 __dev_remove_pack(&fcoe->fcoe_packet_type);
444 __dev_remove_pack(&fcoe->fip_packet_type);
447 /* Delete secondary MAC addresses */
448 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
449 dev_uc_del(netdev, flogi_maddr);
451 dev_uc_del(netdev, fip->ctl_src_addr);
452 if (fip->mode == FIP_MODE_VN2VN) {
453 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
454 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
456 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
458 /* Tell the LLD we are done w/ FCoE */
459 ops = netdev->netdev_ops;
460 if (ops->ndo_fcoe_disable) {
461 if (ops->ndo_fcoe_disable(netdev))
462 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
463 " specific feature for LLD.\n");
468 /* Release the self-reference taken during fcoe_interface_create() */
469 fcoe_interface_put(fcoe);
473 * fcoe_fip_recv() - Handler for received FIP frames
474 * @skb: The receive skb
475 * @netdev: The associated net device
476 * @ptype: The packet_type structure which was used to register this handler
477 * @orig_dev: The original net_device the the skb was received on.
478 * (in case dev is a bond)
480 * Returns: 0 for success
482 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
483 struct packet_type *ptype,
484 struct net_device *orig_dev)
486 struct fcoe_interface *fcoe;
488 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
489 fcoe_ctlr_recv(&fcoe->ctlr, skb);
494 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
495 * @port: The FCoE port
496 * @skb: The FIP/FCoE packet to be sent
498 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
500 if (port->fcoe_pending_queue.qlen)
501 fcoe_check_wait_queue(port->lport, skb);
502 else if (fcoe_start_io(skb))
503 fcoe_check_wait_queue(port->lport, skb);
507 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
508 * @fip: The FCoE controller
509 * @skb: The FIP packet to be sent
511 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
513 skb->dev = fcoe_from_ctlr(fip)->netdev;
514 fcoe_port_send(lport_priv(fip->lp), skb);
518 * fcoe_update_src_mac() - Update the Ethernet MAC filters
519 * @lport: The local port to update the source MAC on
520 * @addr: Unicast MAC address to add
522 * Remove any previously-set unicast MAC filter.
523 * Add secondary FCoE MAC address filter for our OUI.
525 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
527 struct fcoe_port *port = lport_priv(lport);
528 struct fcoe_interface *fcoe = port->priv;
531 if (!is_zero_ether_addr(port->data_src_addr))
532 dev_uc_del(fcoe->netdev, port->data_src_addr);
533 if (!is_zero_ether_addr(addr))
534 dev_uc_add(fcoe->netdev, addr);
535 memcpy(port->data_src_addr, addr, ETH_ALEN);
540 * fcoe_get_src_mac() - return the Ethernet source address for an lport
541 * @lport: libfc lport
543 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
545 struct fcoe_port *port = lport_priv(lport);
547 return port->data_src_addr;
551 * fcoe_lport_config() - Set up a local port
552 * @lport: The local port to be setup
554 * Returns: 0 for success
556 static int fcoe_lport_config(struct fc_lport *lport)
560 lport->max_retry_count = 3;
561 lport->max_rport_retry_count = 3;
562 lport->e_d_tov = 2 * 1000; /* FC-FS default */
563 lport->r_a_tov = 2 * 2 * 1000;
564 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
565 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
566 lport->does_npiv = 1;
568 fc_lport_init_stats(lport);
570 /* lport fc_lport related configuration */
571 fc_lport_config(lport);
573 /* offload related configuration */
574 lport->crc_offload = 0;
575 lport->seq_offload = 0;
576 lport->lro_enabled = 0;
584 * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
585 * @netdev: the associated net device
586 * @wwn: the output WWN
587 * @type: the type of WWN (WWPN or WWNN)
589 * Returns: 0 for success
591 static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
593 const struct net_device_ops *ops = netdev->netdev_ops;
595 if (ops->ndo_fcoe_get_wwn)
596 return ops->ndo_fcoe_get_wwn(netdev, wwn, type);
601 * fcoe_netdev_features_change - Updates the lport's offload flags based
602 * on the LLD netdev's FCoE feature flags
604 static void fcoe_netdev_features_change(struct fc_lport *lport,
605 struct net_device *netdev)
607 mutex_lock(&lport->lp_mutex);
609 if (netdev->features & NETIF_F_SG)
614 if (netdev->features & NETIF_F_FCOE_CRC) {
615 lport->crc_offload = 1;
616 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
618 lport->crc_offload = 0;
621 if (netdev->features & NETIF_F_FSO) {
622 lport->seq_offload = 1;
623 lport->lso_max = netdev->gso_max_size;
624 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
627 lport->seq_offload = 0;
631 if (netdev->fcoe_ddp_xid) {
632 lport->lro_enabled = 1;
633 lport->lro_xid = netdev->fcoe_ddp_xid;
634 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
637 lport->lro_enabled = 0;
641 mutex_unlock(&lport->lp_mutex);
645 * fcoe_netdev_config() - Set up net devive for SW FCoE
646 * @lport: The local port that is associated with the net device
647 * @netdev: The associated net device
649 * Must be called after fcoe_lport_config() as it will use local port mutex
651 * Returns: 0 for success
653 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
657 struct fcoe_interface *fcoe;
658 struct fcoe_port *port;
660 /* Setup lport private data to point to fcoe softc */
661 port = lport_priv(lport);
665 * Determine max frame size based on underlying device and optional
666 * user-configured limit. If the MFS is too low, fcoe_link_ok()
667 * will return 0, so do this first.
670 if (netdev->features & NETIF_F_FCOE_MTU) {
672 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
674 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
675 if (fc_set_mfs(lport, mfs))
678 /* offload features support */
679 fcoe_netdev_features_change(lport, netdev);
681 skb_queue_head_init(&port->fcoe_pending_queue);
682 port->fcoe_pending_queue_active = 0;
683 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
685 fcoe_link_speed_update(lport);
688 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
689 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
690 fc_set_wwnn(lport, wwnn);
691 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
692 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr,
694 fc_set_wwpn(lport, wwpn);
701 * fcoe_shost_config() - Set up the SCSI host associated with a local port
702 * @lport: The local port
703 * @dev: The device associated with the SCSI host
705 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
707 * Returns: 0 for success
709 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
713 /* lport scsi host config */
714 lport->host->max_lun = FCOE_MAX_LUN;
715 lport->host->max_id = FCOE_MAX_FCP_TARGET;
716 lport->host->max_channel = 0;
717 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
720 lport->host->transportt = fcoe_vport_scsi_transport;
722 lport->host->transportt = fcoe_nport_scsi_transport;
724 /* add the new host to the SCSI-ml */
725 rc = scsi_add_host(lport->host, dev);
727 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
728 "error on scsi_add_host\n");
733 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
735 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
736 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
737 fcoe_netdev(lport)->name);
743 * fcoe_oem_match() - The match routine for the offloaded exchange manager
746 * This routine will be associated with an exchange manager (EM). When
747 * the libfc exchange handling code is looking for an EM to use it will
748 * call this routine and pass it the frame that it wishes to send. This
749 * routine will return True if the associated EM is to be used and False
750 * if the echange code should continue looking for an EM.
752 * The offload EM that this routine is associated with will handle any
753 * packets that are for SCSI read requests.
755 * This has been enhanced to work when FCoE stack is operating in target
758 * Returns: True for read types I/O, otherwise returns false.
760 bool fcoe_oem_match(struct fc_frame *fp)
762 struct fc_frame_header *fh = fc_frame_header_get(fp);
763 struct fcp_cmnd *fcp;
765 if (fc_fcp_is_read(fr_fsp(fp)) &&
766 (fr_fsp(fp)->data_len > fcoe_ddp_min))
768 else if (!(ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)) {
769 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
770 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN &&
771 fcp && (ntohl(fcp->fc_dl) > fcoe_ddp_min) &&
772 (fcp->fc_flags & FCP_CFL_WRDATA))
779 * fcoe_em_config() - Allocate and configure an exchange manager
780 * @lport: The local port that the new EM will be associated with
782 * Returns: 0 on success
784 static inline int fcoe_em_config(struct fc_lport *lport)
786 struct fcoe_port *port = lport_priv(lport);
787 struct fcoe_interface *fcoe = port->priv;
788 struct fcoe_interface *oldfcoe = NULL;
789 struct net_device *old_real_dev, *cur_real_dev;
790 u16 min_xid = FCOE_MIN_XID;
791 u16 max_xid = FCOE_MAX_XID;
794 * Check if need to allocate an em instance for
795 * offload exchange ids to be shared across all VN_PORTs/lport.
797 if (!lport->lro_enabled || !lport->lro_xid ||
798 (lport->lro_xid >= max_xid)) {
804 * Reuse existing offload em instance in case
805 * it is already allocated on real eth device
807 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
808 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
810 cur_real_dev = fcoe->netdev;
812 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
813 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
814 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
816 old_real_dev = oldfcoe->netdev;
818 if (cur_real_dev == old_real_dev) {
819 fcoe->oem = oldfcoe->oem;
825 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
826 printk(KERN_ERR "fcoe_em_config: failed to add "
827 "offload em:%p on interface:%s\n",
828 fcoe->oem, fcoe->netdev->name);
832 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
833 FCOE_MIN_XID, lport->lro_xid,
836 printk(KERN_ERR "fcoe_em_config: failed to allocate "
837 "em for offload exches on interface:%s\n",
844 * Exclude offload EM xid range from next EM xid range.
846 min_xid += lport->lro_xid + 1;
849 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
850 printk(KERN_ERR "fcoe_em_config: failed to "
851 "allocate em on interface %s\n", fcoe->netdev->name);
859 * fcoe_if_destroy() - Tear down a SW FCoE instance
860 * @lport: The local port to be destroyed
863 static void fcoe_if_destroy(struct fc_lport *lport)
865 struct fcoe_port *port = lport_priv(lport);
866 struct fcoe_interface *fcoe = port->priv;
867 struct net_device *netdev = fcoe->netdev;
869 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
871 /* Logout of the fabric */
872 fc_fabric_logoff(lport);
874 /* Cleanup the fc_lport */
875 fc_lport_destroy(lport);
877 /* Stop the transmit retry timer */
878 del_timer_sync(&port->timer);
880 /* Free existing transmit skbs */
881 fcoe_clean_pending_queue(lport);
884 if (!is_zero_ether_addr(port->data_src_addr))
885 dev_uc_del(netdev, port->data_src_addr);
888 /* Release reference held in fcoe_if_create() */
889 fcoe_interface_put(fcoe);
891 /* Free queued packets for the per-CPU receive threads */
892 fcoe_percpu_clean(lport);
894 /* Detach from the scsi-ml */
895 fc_remove_host(lport->host);
896 scsi_remove_host(lport->host);
898 /* Destroy lport scsi_priv */
899 fc_fcp_destroy(lport);
901 /* There are no more rports or I/O, free the EM */
902 fc_exch_mgr_free(lport);
904 /* Free memory used by statistical counters */
905 fc_lport_free_stats(lport);
907 /* Release the Scsi_Host */
908 scsi_host_put(lport->host);
912 * fcoe_ddp_setup() - Call a LLD's ddp_setup 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_setup(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_setup)
926 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
934 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
935 * @lport: The local port to setup DDP for
936 * @xid: The exchange ID for this DDP transfer
937 * @sgl: The scatterlist describing this transfer
938 * @sgc: The number of sg items
940 * Returns: 0 if the DDP context was not configured
942 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
943 struct scatterlist *sgl, unsigned int sgc)
945 struct net_device *netdev = fcoe_netdev(lport);
947 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
948 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
956 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
957 * @lport: The local port to complete DDP on
958 * @xid: The exchange ID for this DDP transfer
960 * Returns: the length of data that have been completed by DDP
962 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
964 struct net_device *netdev = fcoe_netdev(lport);
966 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
967 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
972 * fcoe_if_create() - Create a FCoE instance on an interface
973 * @fcoe: The FCoE interface to create a local port on
974 * @parent: The device pointer to be the parent in sysfs for the SCSI host
975 * @npiv: Indicates if the port is a vport or not
977 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
979 * Returns: The allocated fc_lport or an error pointer
981 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
982 struct device *parent, int npiv)
984 struct net_device *netdev = fcoe->netdev;
985 struct fc_lport *lport, *n_port;
986 struct fcoe_port *port;
987 struct Scsi_Host *shost;
990 * parent is only a vport if npiv is 1,
991 * but we'll only use vport in that case so go ahead and set it
993 struct fc_vport *vport = dev_to_vport(parent);
995 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
998 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1000 lport = libfc_vport_create(vport, sizeof(*port));
1003 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1007 port = lport_priv(lport);
1008 port->lport = lport;
1010 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1011 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1012 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1014 /* configure a fc_lport including the exchange manager */
1015 rc = fcoe_lport_config(lport);
1017 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1023 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1024 "%16.16llx %16.16llx\n",
1025 vport->node_name, vport->port_name);
1026 fc_set_wwnn(lport, vport->node_name);
1027 fc_set_wwpn(lport, vport->port_name);
1030 /* configure lport network properties */
1031 rc = fcoe_netdev_config(lport, netdev);
1033 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1035 goto out_lp_destroy;
1038 /* configure lport scsi host properties */
1039 rc = fcoe_shost_config(lport, parent);
1041 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1043 goto out_lp_destroy;
1046 /* Initialize the library */
1047 rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1);
1049 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1051 goto out_lp_destroy;
1055 * fcoe_em_alloc() and fcoe_hostlist_add() both
1056 * need to be atomic with respect to other changes to the
1057 * hostlist since fcoe_em_alloc() looks for an existing EM
1058 * instance on host list updated by fcoe_hostlist_add().
1060 * This is currently handled through the fcoe_config_mutex
1064 /* lport exch manager allocation */
1065 rc = fcoe_em_config(lport);
1067 shost = vport_to_shost(vport);
1068 n_port = shost_priv(shost);
1069 rc = fc_exch_mgr_list_clone(n_port, lport);
1073 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1074 goto out_lp_destroy;
1077 fcoe_interface_get(fcoe);
1081 fc_exch_mgr_free(lport);
1083 scsi_host_put(lport->host);
1089 * fcoe_if_init() - Initialization routine for fcoe.ko
1091 * Attaches the SW FCoE transport to the FC transport
1093 * Returns: 0 on success
1095 static int __init fcoe_if_init(void)
1097 /* attach to scsi transport */
1098 fcoe_nport_scsi_transport =
1099 fc_attach_transport(&fcoe_nport_fc_functions);
1100 fcoe_vport_scsi_transport =
1101 fc_attach_transport(&fcoe_vport_fc_functions);
1103 if (!fcoe_nport_scsi_transport) {
1104 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1112 * fcoe_if_exit() - Tear down fcoe.ko
1114 * Detaches the SW FCoE transport from the FC transport
1116 * Returns: 0 on success
1118 int __exit fcoe_if_exit(void)
1120 fc_release_transport(fcoe_nport_scsi_transport);
1121 fc_release_transport(fcoe_vport_scsi_transport);
1122 fcoe_nport_scsi_transport = NULL;
1123 fcoe_vport_scsi_transport = NULL;
1128 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1129 * @cpu: The CPU index of the CPU to create a receive thread for
1131 static void fcoe_percpu_thread_create(unsigned int cpu)
1133 struct fcoe_percpu_s *p;
1134 struct task_struct *thread;
1136 p = &per_cpu(fcoe_percpu, cpu);
1138 thread = kthread_create(fcoe_percpu_receive_thread,
1139 (void *)p, "fcoethread/%d", cpu);
1141 if (likely(!IS_ERR(thread))) {
1142 kthread_bind(thread, cpu);
1143 wake_up_process(thread);
1145 spin_lock_bh(&p->fcoe_rx_list.lock);
1147 spin_unlock_bh(&p->fcoe_rx_list.lock);
1152 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1153 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1155 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1156 * current CPU's Rx thread. If the thread being destroyed is bound to
1157 * the CPU processing this context the skbs will be freed.
1159 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1161 struct fcoe_percpu_s *p;
1162 struct task_struct *thread;
1163 struct page *crc_eof;
1164 struct sk_buff *skb;
1166 struct fcoe_percpu_s *p0;
1167 unsigned targ_cpu = get_cpu();
1168 #endif /* CONFIG_SMP */
1170 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1172 /* Prevent any new skbs from being queued for this CPU. */
1173 p = &per_cpu(fcoe_percpu, cpu);
1174 spin_lock_bh(&p->fcoe_rx_list.lock);
1177 crc_eof = p->crc_eof_page;
1178 p->crc_eof_page = NULL;
1179 p->crc_eof_offset = 0;
1180 spin_unlock_bh(&p->fcoe_rx_list.lock);
1184 * Don't bother moving the skb's if this context is running
1185 * on the same CPU that is having its thread destroyed. This
1186 * can easily happen when the module is removed.
1188 if (cpu != targ_cpu) {
1189 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1190 spin_lock_bh(&p0->fcoe_rx_list.lock);
1192 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1195 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1196 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1197 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1200 * The targeted CPU is not initialized and cannot accept
1201 * new skbs. Unlock the targeted CPU and drop the skbs
1202 * on the CPU that is going offline.
1204 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1206 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1210 * This scenario occurs when the module is being removed
1211 * and all threads are being destroyed. skbs will continue
1212 * to be shifted from the CPU thread that is being removed
1213 * to the CPU thread associated with the CPU that is processing
1214 * the module removal. Once there is only one CPU Rx thread it
1215 * will reach this case and we will drop all skbs and later
1218 spin_lock_bh(&p->fcoe_rx_list.lock);
1219 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1221 spin_unlock_bh(&p->fcoe_rx_list.lock);
1226 * This a non-SMP scenario where the singular Rx thread is
1227 * being removed. Free all skbs and stop the thread.
1229 spin_lock_bh(&p->fcoe_rx_list.lock);
1230 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1232 spin_unlock_bh(&p->fcoe_rx_list.lock);
1236 kthread_stop(thread);
1243 * fcoe_cpu_callback() - Handler for CPU hotplug events
1244 * @nfb: The callback data block
1245 * @action: The event triggering the callback
1246 * @hcpu: The index of the CPU that the event is for
1248 * This creates or destroys per-CPU data for fcoe
1250 * Returns NOTIFY_OK always.
1252 static int fcoe_cpu_callback(struct notifier_block *nfb,
1253 unsigned long action, void *hcpu)
1255 unsigned cpu = (unsigned long)hcpu;
1259 case CPU_ONLINE_FROZEN:
1260 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1261 fcoe_percpu_thread_create(cpu);
1264 case CPU_DEAD_FROZEN:
1265 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1266 fcoe_percpu_thread_destroy(cpu);
1275 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1278 * This routine selects next CPU based on cpumask to distribute
1279 * incoming requests in round robin.
1281 * Returns: int CPU number
1283 static inline unsigned int fcoe_select_cpu(void)
1285 static unsigned int selected_cpu;
1287 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1288 if (selected_cpu >= nr_cpu_ids)
1289 selected_cpu = cpumask_first(cpu_online_mask);
1291 return selected_cpu;
1295 * fcoe_rcv() - Receive packets from a net device
1296 * @skb: The received packet
1297 * @netdev: The net device that the packet was received on
1298 * @ptype: The packet type context
1299 * @olddev: The last device net device
1301 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1302 * FC frame and passes the frame to libfc.
1304 * Returns: 0 for success
1306 int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1307 struct packet_type *ptype, struct net_device *olddev)
1309 struct fc_lport *lport;
1310 struct fcoe_rcv_info *fr;
1311 struct fcoe_interface *fcoe;
1312 struct fc_frame_header *fh;
1313 struct fcoe_percpu_s *fps;
1317 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1318 lport = fcoe->ctlr.lp;
1319 if (unlikely(!lport)) {
1320 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1323 if (!lport->link_up)
1326 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1327 "data:%p tail:%p end:%p sum:%d dev:%s",
1328 skb->len, skb->data_len, skb->head, skb->data,
1329 skb_tail_pointer(skb), skb_end_pointer(skb),
1330 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1334 if (is_fip_mode(&fcoe->ctlr) &&
1335 compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) {
1336 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1342 * Check for minimum frame length, and make sure required FCoE
1343 * and FC headers are pulled into the linear data area.
1345 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1346 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1349 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1350 fh = (struct fc_frame_header *) skb_transport_header(skb);
1352 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1353 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1358 fr = fcoe_dev_from_skb(skb);
1362 * In case the incoming frame's exchange is originated from
1363 * the initiator, then received frame's exchange id is ANDed
1364 * with fc_cpu_mask bits to get the same cpu on which exchange
1365 * was originated, otherwise select cpu using rx exchange id
1366 * or fcoe_select_cpu().
1368 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1369 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1371 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1372 cpu = fcoe_select_cpu();
1374 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1377 if (cpu >= nr_cpu_ids)
1380 fps = &per_cpu(fcoe_percpu, cpu);
1381 spin_lock_bh(&fps->fcoe_rx_list.lock);
1382 if (unlikely(!fps->thread)) {
1384 * The targeted CPU is not ready, let's target
1385 * the first CPU now. For non-SMP systems this
1386 * will check the same CPU twice.
1388 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1389 "ready for incoming skb- using first online "
1392 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1393 cpu = cpumask_first(cpu_online_mask);
1394 fps = &per_cpu(fcoe_percpu, cpu);
1395 spin_lock_bh(&fps->fcoe_rx_list.lock);
1397 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1403 * We now have a valid CPU that we're targeting for
1404 * this skb. We also have this receive thread locked,
1405 * so we're free to queue skbs into it's queue.
1408 /* If this is a SCSI-FCP frame, and this is already executing on the
1409 * correct CPU, and the queue for this CPU is empty, then go ahead
1410 * and process the frame directly in the softirq context.
1411 * This lets us process completions without context switching from the
1412 * NET_RX softirq, to our receive processing thread, and then back to
1413 * BLOCK softirq context.
1415 if (fh->fh_type == FC_TYPE_FCP &&
1416 cpu == smp_processor_id() &&
1417 skb_queue_empty(&fps->fcoe_rx_list)) {
1418 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1419 fcoe_recv_frame(skb);
1421 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1422 if (fps->fcoe_rx_list.qlen == 1)
1423 wake_up_process(fps->thread);
1424 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1429 per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++;
1437 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1438 * @skb: The packet to be transmitted
1439 * @tlen: The total length of the trailer
1441 * Returns: 0 for success
1443 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1445 struct fcoe_percpu_s *fps;
1448 fps = &get_cpu_var(fcoe_percpu);
1449 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1450 put_cpu_var(fcoe_percpu);
1456 * fcoe_xmit() - Transmit a FCoE frame
1457 * @lport: The local port that the frame is to be transmitted for
1458 * @fp: The frame to be transmitted
1460 * Return: 0 for success
1462 int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1467 struct fcoe_crc_eof *cp;
1468 struct sk_buff *skb;
1469 struct fcoe_dev_stats *stats;
1470 struct fc_frame_header *fh;
1471 unsigned int hlen; /* header length implies the version */
1472 unsigned int tlen; /* trailer length */
1473 unsigned int elen; /* eth header, may include vlan */
1474 struct fcoe_port *port = lport_priv(lport);
1475 struct fcoe_interface *fcoe = port->priv;
1477 struct fcoe_hdr *hp;
1479 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1481 fh = fc_frame_header_get(fp);
1483 wlen = skb->len / FCOE_WORD_TO_BYTE;
1485 if (!lport->link_up) {
1490 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1491 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1497 elen = sizeof(struct ethhdr);
1498 hlen = sizeof(struct fcoe_hdr);
1499 tlen = sizeof(struct fcoe_crc_eof);
1500 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1503 if (likely(lport->crc_offload)) {
1504 skb->ip_summed = CHECKSUM_PARTIAL;
1505 skb->csum_start = skb_headroom(skb);
1506 skb->csum_offset = skb->len;
1509 skb->ip_summed = CHECKSUM_NONE;
1510 crc = fcoe_fc_crc(fp);
1513 /* copy port crc and eof to the skb buff */
1514 if (skb_is_nonlinear(skb)) {
1516 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1520 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1521 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1522 + frag->page_offset;
1524 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1527 memset(cp, 0, sizeof(*cp));
1529 cp->fcoe_crc32 = cpu_to_le32(~crc);
1531 if (skb_is_nonlinear(skb)) {
1532 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1536 /* adjust skb network/transport offsets to match mac/fcoe/port */
1537 skb_push(skb, elen + hlen);
1538 skb_reset_mac_header(skb);
1539 skb_reset_network_header(skb);
1540 skb->mac_len = elen;
1541 skb->protocol = htons(ETH_P_FCOE);
1542 skb->dev = fcoe->netdev;
1544 /* fill up mac and fcoe headers */
1546 eh->h_proto = htons(ETH_P_FCOE);
1547 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1548 if (fcoe->ctlr.map_dest)
1549 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1551 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1552 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1554 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1556 hp = (struct fcoe_hdr *)(eh + 1);
1557 memset(hp, 0, sizeof(*hp));
1559 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1562 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1563 if (lport->seq_offload && fr_max_payload(fp)) {
1564 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1565 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1567 skb_shinfo(skb)->gso_type = 0;
1568 skb_shinfo(skb)->gso_size = 0;
1570 /* update tx stats: regardless if LLD fails */
1571 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1573 stats->TxWords += wlen;
1576 /* send down to lld */
1578 fcoe_port_send(port, skb);
1583 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1584 * @skb: The completed skb (argument required by destructor)
1586 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1588 complete(&fcoe_flush_completion);
1592 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1593 * @lport: The local port the frame was received on
1594 * @fp: The received frame
1596 * Return: 0 on passing filtering checks
1598 static inline int fcoe_filter_frames(struct fc_lport *lport,
1599 struct fc_frame *fp)
1601 struct fcoe_interface *fcoe;
1602 struct fc_frame_header *fh;
1603 struct sk_buff *skb = (struct sk_buff *)fp;
1604 struct fcoe_dev_stats *stats;
1607 * We only check CRC if no offload is available and if it is
1608 * it's solicited data, in which case, the FCP layer would
1609 * check it during the copy.
1611 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1612 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1614 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1616 fh = (struct fc_frame_header *) skb_transport_header(skb);
1617 fh = fc_frame_header_get(fp);
1618 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1621 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1622 if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1623 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1624 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1628 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1629 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1630 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1634 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1635 stats->InvalidCRCCount++;
1636 if (stats->InvalidCRCCount < 5)
1637 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1642 * fcoe_recv_frame() - process a single received frame
1643 * @skb: frame to process
1645 static void fcoe_recv_frame(struct sk_buff *skb)
1648 struct fc_lport *lport;
1649 struct fcoe_rcv_info *fr;
1650 struct fcoe_dev_stats *stats;
1651 struct fcoe_crc_eof crc_eof;
1652 struct fc_frame *fp;
1653 struct fcoe_port *port;
1654 struct fcoe_hdr *hp;
1656 fr = fcoe_dev_from_skb(skb);
1658 if (unlikely(!lport)) {
1659 if (skb->destructor != fcoe_percpu_flush_done)
1660 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1665 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1666 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1667 skb->len, skb->data_len,
1668 skb->head, skb->data, skb_tail_pointer(skb),
1669 skb_end_pointer(skb), skb->csum,
1670 skb->dev ? skb->dev->name : "<NULL>");
1672 port = lport_priv(lport);
1673 if (skb_is_nonlinear(skb))
1674 skb_linearize(skb); /* not ideal */
1677 * Frame length checks and setting up the header pointers
1678 * was done in fcoe_rcv already.
1680 hp = (struct fcoe_hdr *) skb_network_header(skb);
1682 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1683 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1684 if (stats->ErrorFrames < 5)
1685 printk(KERN_WARNING "fcoe: FCoE version "
1686 "mismatch: The frame has "
1687 "version %x, but the "
1688 "initiator supports version "
1689 "%x\n", FC_FCOE_DECAPS_VER(hp),
1694 skb_pull(skb, sizeof(struct fcoe_hdr));
1695 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1698 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1700 fp = (struct fc_frame *)skb;
1703 fr_sof(fp) = hp->fcoe_sof;
1705 /* Copy out the CRC and EOF trailer for access */
1706 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1708 fr_eof(fp) = crc_eof.fcoe_eof;
1709 fr_crc(fp) = crc_eof.fcoe_crc32;
1710 if (pskb_trim(skb, fr_len))
1713 if (!fcoe_filter_frames(lport, fp)) {
1715 fc_exch_recv(lport, fp);
1719 stats->ErrorFrames++;
1725 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1726 * @arg: The per-CPU context
1728 * Return: 0 for success
1730 int fcoe_percpu_receive_thread(void *arg)
1732 struct fcoe_percpu_s *p = arg;
1733 struct sk_buff *skb;
1735 set_user_nice(current, -20);
1737 while (!kthread_should_stop()) {
1739 spin_lock_bh(&p->fcoe_rx_list.lock);
1740 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1741 set_current_state(TASK_INTERRUPTIBLE);
1742 spin_unlock_bh(&p->fcoe_rx_list.lock);
1744 set_current_state(TASK_RUNNING);
1745 if (kthread_should_stop())
1747 spin_lock_bh(&p->fcoe_rx_list.lock);
1749 spin_unlock_bh(&p->fcoe_rx_list.lock);
1750 fcoe_recv_frame(skb);
1756 * fcoe_dev_setup() - Setup the link change notification interface
1758 static void fcoe_dev_setup(void)
1760 register_netdevice_notifier(&fcoe_notifier);
1764 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1766 static void fcoe_dev_cleanup(void)
1768 unregister_netdevice_notifier(&fcoe_notifier);
1772 * fcoe_device_notification() - Handler for net device events
1773 * @notifier: The context of the notification
1774 * @event: The type of event
1775 * @ptr: The net device that the event was on
1777 * This function is called by the Ethernet driver in case of link change event.
1779 * Returns: 0 for success
1781 static int fcoe_device_notification(struct notifier_block *notifier,
1782 ulong event, void *ptr)
1784 struct fc_lport *lport = NULL;
1785 struct net_device *netdev = ptr;
1786 struct fcoe_interface *fcoe;
1787 struct fcoe_port *port;
1788 struct fcoe_dev_stats *stats;
1789 u32 link_possible = 1;
1793 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1794 if (fcoe->netdev == netdev) {
1795 lport = fcoe->ctlr.lp;
1806 case NETDEV_GOING_DOWN:
1812 case NETDEV_CHANGEMTU:
1813 if (netdev->features & NETIF_F_FCOE_MTU)
1815 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1816 sizeof(struct fcoe_crc_eof));
1817 if (mfs >= FC_MIN_MAX_FRAME)
1818 fc_set_mfs(lport, mfs);
1820 case NETDEV_REGISTER:
1822 case NETDEV_UNREGISTER:
1823 list_del(&fcoe->list);
1824 port = lport_priv(fcoe->ctlr.lp);
1825 queue_work(fcoe_wq, &port->destroy_work);
1828 case NETDEV_FEAT_CHANGE:
1829 fcoe_netdev_features_change(lport, netdev);
1832 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1833 "from netdev netlink\n", event);
1836 fcoe_link_speed_update(lport);
1838 if (link_possible && !fcoe_link_ok(lport))
1839 fcoe_ctlr_link_up(&fcoe->ctlr);
1840 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1841 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1842 stats->LinkFailureCount++;
1844 fcoe_clean_pending_queue(lport);
1851 * fcoe_disable() - Disables a FCoE interface
1852 * @netdev : The net_device object the Ethernet interface to create on
1854 * Called from fcoe transport.
1856 * Returns: 0 for success
1858 static int fcoe_disable(struct net_device *netdev)
1860 struct fcoe_interface *fcoe;
1863 mutex_lock(&fcoe_config_mutex);
1866 fcoe = fcoe_hostlist_lookup_port(netdev);
1870 fcoe_ctlr_link_down(&fcoe->ctlr);
1871 fcoe_clean_pending_queue(fcoe->ctlr.lp);
1875 mutex_unlock(&fcoe_config_mutex);
1880 * fcoe_enable() - Enables a FCoE interface
1881 * @netdev : The net_device object the Ethernet interface to create on
1883 * Called from fcoe transport.
1885 * Returns: 0 for success
1887 static int fcoe_enable(struct net_device *netdev)
1889 struct fcoe_interface *fcoe;
1892 mutex_lock(&fcoe_config_mutex);
1894 fcoe = fcoe_hostlist_lookup_port(netdev);
1899 else if (!fcoe_link_ok(fcoe->ctlr.lp))
1900 fcoe_ctlr_link_up(&fcoe->ctlr);
1902 mutex_unlock(&fcoe_config_mutex);
1907 * fcoe_destroy() - Destroy a FCoE interface
1908 * @netdev : The net_device object the Ethernet interface to create on
1910 * Called from fcoe transport
1912 * Returns: 0 for success
1914 static int fcoe_destroy(struct net_device *netdev)
1916 struct fcoe_interface *fcoe;
1917 struct fc_lport *lport;
1918 struct fcoe_port *port;
1921 mutex_lock(&fcoe_config_mutex);
1923 fcoe = fcoe_hostlist_lookup_port(netdev);
1928 lport = fcoe->ctlr.lp;
1929 port = lport_priv(lport);
1930 list_del(&fcoe->list);
1931 queue_work(fcoe_wq, &port->destroy_work);
1934 mutex_unlock(&fcoe_config_mutex);
1939 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1940 * @work: Handle to the FCoE port to be destroyed
1942 static void fcoe_destroy_work(struct work_struct *work)
1944 struct fcoe_port *port;
1945 struct fcoe_interface *fcoe;
1948 port = container_of(work, struct fcoe_port, destroy_work);
1949 mutex_lock(&fcoe_config_mutex);
1951 /* set if this is an NPIV port */
1952 npiv = port->lport->vport ? 1 : 0;
1955 fcoe_if_destroy(port->lport);
1957 /* Do not tear down the fcoe interface for NPIV port */
1959 fcoe_interface_cleanup(fcoe);
1961 mutex_unlock(&fcoe_config_mutex);
1965 * fcoe_match() - Check if the FCoE is supported on the given netdevice
1966 * @netdev : The net_device object the Ethernet interface to create on
1968 * Called from fcoe transport.
1970 * Returns: always returns true as this is the default FCoE transport,
1971 * i.e., support all netdevs.
1973 static bool fcoe_match(struct net_device *netdev)
1979 * fcoe_create() - Create a fcoe interface
1980 * @netdev : The net_device object the Ethernet interface to create on
1981 * @fip_mode: The FIP mode for this creation
1983 * Called from fcoe transport
1985 * Returns: 0 for success
1987 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
1990 struct fcoe_interface *fcoe;
1991 struct fc_lport *lport;
1993 mutex_lock(&fcoe_config_mutex);
1996 /* look for existing lport */
1997 if (fcoe_hostlist_lookup(netdev)) {
2002 fcoe = fcoe_interface_create(netdev, fip_mode);
2008 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
2009 if (IS_ERR(lport)) {
2010 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2014 fcoe_interface_cleanup(fcoe);
2018 /* Make this the "master" N_Port */
2019 fcoe->ctlr.lp = lport;
2021 /* add to lports list */
2022 fcoe_hostlist_add(lport);
2024 /* start FIP Discovery and FLOGI */
2025 lport->boot_time = jiffies;
2026 fc_fabric_login(lport);
2027 if (!fcoe_link_ok(lport))
2028 fcoe_ctlr_link_up(&fcoe->ctlr);
2033 mutex_unlock(&fcoe_config_mutex);
2038 * fcoe_link_speed_update() - Update the supported and actual link speeds
2039 * @lport: The local port to update speeds for
2041 * Returns: 0 if the ethtool query was successful
2042 * -1 if the ethtool query failed
2044 int fcoe_link_speed_update(struct fc_lport *lport)
2046 struct net_device *netdev = fcoe_netdev(lport);
2047 struct ethtool_cmd ecmd;
2049 if (!dev_ethtool_get_settings(netdev, &ecmd)) {
2050 lport->link_supported_speeds &=
2051 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
2052 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
2053 SUPPORTED_1000baseT_Full))
2054 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
2055 if (ecmd.supported & SUPPORTED_10000baseT_Full)
2056 lport->link_supported_speeds |=
2057 FC_PORTSPEED_10GBIT;
2058 switch (ethtool_cmd_speed(&ecmd)) {
2060 lport->link_speed = FC_PORTSPEED_1GBIT;
2063 lport->link_speed = FC_PORTSPEED_10GBIT;
2072 * fcoe_link_ok() - Check if the link is OK for a local port
2073 * @lport: The local port to check link on
2075 * Returns: 0 if link is UP and OK, -1 if not
2078 int fcoe_link_ok(struct fc_lport *lport)
2080 struct net_device *netdev = fcoe_netdev(lport);
2082 if (netif_oper_up(netdev))
2088 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2089 * @lport: The local port whose skbs are to be cleared
2091 * Must be called with fcoe_create_mutex held to single-thread completion.
2093 * This flushes the pending skbs by adding a new skb to each queue and
2094 * waiting until they are all freed. This assures us that not only are
2095 * there no packets that will be handled by the lport, but also that any
2096 * threads already handling packet have returned.
2098 void fcoe_percpu_clean(struct fc_lport *lport)
2100 struct fcoe_percpu_s *pp;
2101 struct fcoe_rcv_info *fr;
2102 struct sk_buff_head *list;
2103 struct sk_buff *skb, *next;
2104 struct sk_buff *head;
2107 for_each_possible_cpu(cpu) {
2108 pp = &per_cpu(fcoe_percpu, cpu);
2109 spin_lock_bh(&pp->fcoe_rx_list.lock);
2110 list = &pp->fcoe_rx_list;
2112 for (skb = head; skb != (struct sk_buff *)list;
2115 fr = fcoe_dev_from_skb(skb);
2116 if (fr->fr_dev == lport) {
2117 __skb_unlink(skb, list);
2122 if (!pp->thread || !cpu_online(cpu)) {
2123 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2127 skb = dev_alloc_skb(0);
2129 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2132 skb->destructor = fcoe_percpu_flush_done;
2134 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2135 if (pp->fcoe_rx_list.qlen == 1)
2136 wake_up_process(pp->thread);
2137 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2139 wait_for_completion(&fcoe_flush_completion);
2144 * fcoe_reset() - Reset a local port
2145 * @shost: The SCSI host associated with the local port to be reset
2147 * Returns: Always 0 (return value required by FC transport template)
2149 int fcoe_reset(struct Scsi_Host *shost)
2151 struct fc_lport *lport = shost_priv(shost);
2152 struct fcoe_port *port = lport_priv(lport);
2153 struct fcoe_interface *fcoe = port->priv;
2155 fcoe_ctlr_link_down(&fcoe->ctlr);
2156 fcoe_clean_pending_queue(fcoe->ctlr.lp);
2157 if (!fcoe_link_ok(fcoe->ctlr.lp))
2158 fcoe_ctlr_link_up(&fcoe->ctlr);
2163 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2164 * @netdev: The net device used as a key
2166 * Locking: Must be called with the RNL mutex held.
2168 * Returns: NULL or the FCoE interface
2170 static struct fcoe_interface *
2171 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2173 struct fcoe_interface *fcoe;
2175 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2176 if (fcoe->netdev == netdev)
2183 * fcoe_hostlist_lookup() - Find the local port associated with a
2185 * @netdev: The netdevice used as a key
2187 * Locking: Must be called with the RTNL mutex held
2189 * Returns: NULL or the local port
2191 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2193 struct fcoe_interface *fcoe;
2195 fcoe = fcoe_hostlist_lookup_port(netdev);
2196 return (fcoe) ? fcoe->ctlr.lp : NULL;
2200 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2201 * port to the hostlist
2202 * @lport: The local port that identifies the FCoE interface to be added
2204 * Locking: must be called with the RTNL mutex held
2206 * Returns: 0 for success
2208 static int fcoe_hostlist_add(const struct fc_lport *lport)
2210 struct fcoe_interface *fcoe;
2211 struct fcoe_port *port;
2213 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2215 port = lport_priv(lport);
2217 list_add_tail(&fcoe->list, &fcoe_hostlist);
2223 static struct fcoe_transport fcoe_sw_transport = {
2224 .name = {FCOE_TRANSPORT_DEFAULT},
2226 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2227 .match = fcoe_match,
2228 .create = fcoe_create,
2229 .destroy = fcoe_destroy,
2230 .enable = fcoe_enable,
2231 .disable = fcoe_disable,
2235 * fcoe_init() - Initialize fcoe.ko
2237 * Returns: 0 on success, or a negative value on failure
2239 static int __init fcoe_init(void)
2241 struct fcoe_percpu_s *p;
2245 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2249 /* register as a fcoe transport */
2250 rc = fcoe_transport_attach(&fcoe_sw_transport);
2252 printk(KERN_ERR "failed to register an fcoe transport, check "
2253 "if libfcoe is loaded\n");
2257 mutex_lock(&fcoe_config_mutex);
2259 for_each_possible_cpu(cpu) {
2260 p = &per_cpu(fcoe_percpu, cpu);
2261 skb_queue_head_init(&p->fcoe_rx_list);
2264 for_each_online_cpu(cpu)
2265 fcoe_percpu_thread_create(cpu);
2267 /* Initialize per CPU interrupt thread */
2268 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2272 /* Setup link change notification */
2275 rc = fcoe_if_init();
2279 mutex_unlock(&fcoe_config_mutex);
2283 for_each_online_cpu(cpu) {
2284 fcoe_percpu_thread_destroy(cpu);
2286 mutex_unlock(&fcoe_config_mutex);
2287 destroy_workqueue(fcoe_wq);
2290 module_init(fcoe_init);
2293 * fcoe_exit() - Clean up fcoe.ko
2295 * Returns: 0 on success or a negative value on failure
2297 static void __exit fcoe_exit(void)
2299 struct fcoe_interface *fcoe, *tmp;
2300 struct fcoe_port *port;
2303 mutex_lock(&fcoe_config_mutex);
2307 /* releases the associated fcoe hosts */
2309 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2310 list_del(&fcoe->list);
2311 port = lport_priv(fcoe->ctlr.lp);
2312 queue_work(fcoe_wq, &port->destroy_work);
2316 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2318 for_each_online_cpu(cpu)
2319 fcoe_percpu_thread_destroy(cpu);
2321 mutex_unlock(&fcoe_config_mutex);
2324 * destroy_work's may be chained but destroy_workqueue()
2325 * can take care of them. Just kill the fcoe_wq.
2327 destroy_workqueue(fcoe_wq);
2330 * Detaching from the scsi transport must happen after all
2331 * destroys are done on the fcoe_wq. destroy_workqueue will
2332 * enusre the fcoe_wq is flushed.
2336 /* detach from fcoe transport */
2337 fcoe_transport_detach(&fcoe_sw_transport);
2339 module_exit(fcoe_exit);
2342 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2343 * @seq: active sequence in the FLOGI or FDISC exchange
2344 * @fp: response frame, or error encoded in a pointer (timeout)
2345 * @arg: pointer the the fcoe_ctlr structure
2347 * This handles MAC address management for FCoE, then passes control on to
2348 * the libfc FLOGI response handler.
2350 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2352 struct fcoe_ctlr *fip = arg;
2353 struct fc_exch *exch = fc_seq_exch(seq);
2354 struct fc_lport *lport = exch->lp;
2360 mac = fr_cb(fp)->granted_mac;
2361 if (is_zero_ether_addr(mac)) {
2363 if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
2368 fcoe_update_src_mac(lport, mac);
2370 fc_lport_flogi_resp(seq, fp, lport);
2374 * fcoe_logo_resp() - FCoE specific LOGO response handler
2375 * @seq: active sequence in the LOGO exchange
2376 * @fp: response frame, or error encoded in a pointer (timeout)
2377 * @arg: pointer the the fcoe_ctlr structure
2379 * This handles MAC address management for FCoE, then passes control on to
2380 * the libfc LOGO response handler.
2382 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2384 struct fc_lport *lport = arg;
2385 static u8 zero_mac[ETH_ALEN] = { 0 };
2388 fcoe_update_src_mac(lport, zero_mac);
2389 fc_lport_logo_resp(seq, fp, lport);
2393 * fcoe_elsct_send - FCoE specific ELS handler
2395 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2396 * using FCoE specific response handlers and passing the FIP controller as
2397 * the argument (the lport is still available from the exchange).
2399 * Most of the work here is just handed off to the libfc routine.
2401 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2402 struct fc_frame *fp, unsigned int op,
2403 void (*resp)(struct fc_seq *,
2406 void *arg, u32 timeout)
2408 struct fcoe_port *port = lport_priv(lport);
2409 struct fcoe_interface *fcoe = port->priv;
2410 struct fcoe_ctlr *fip = &fcoe->ctlr;
2411 struct fc_frame_header *fh = fc_frame_header_get(fp);
2416 if (lport->point_to_multipoint)
2418 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2421 /* only hook onto fabric logouts, not port logouts */
2422 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2424 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2427 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2431 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2432 * @vport: fc_vport object to create a new fc_host for
2433 * @disabled: start the new fc_host in a disabled state by default?
2435 * Returns: 0 for success
2437 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2439 struct Scsi_Host *shost = vport_to_shost(vport);
2440 struct fc_lport *n_port = shost_priv(shost);
2441 struct fcoe_port *port = lport_priv(n_port);
2442 struct fcoe_interface *fcoe = port->priv;
2443 struct net_device *netdev = fcoe->netdev;
2444 struct fc_lport *vn_port;
2448 rc = fcoe_validate_vport_create(vport);
2450 wwn_to_str(vport->port_name, buf, sizeof(buf));
2451 printk(KERN_ERR "fcoe: Failed to create vport, "
2452 "WWPN (0x%s) already exists\n",
2457 mutex_lock(&fcoe_config_mutex);
2458 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2459 mutex_unlock(&fcoe_config_mutex);
2461 if (IS_ERR(vn_port)) {
2462 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2468 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2470 vn_port->boot_time = jiffies;
2471 fc_fabric_login(vn_port);
2472 fc_vport_setlink(vn_port);
2478 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2479 * @vport: fc_vport object that is being destroyed
2481 * Returns: 0 for success
2483 static int fcoe_vport_destroy(struct fc_vport *vport)
2485 struct Scsi_Host *shost = vport_to_shost(vport);
2486 struct fc_lport *n_port = shost_priv(shost);
2487 struct fc_lport *vn_port = vport->dd_data;
2488 struct fcoe_port *port = lport_priv(vn_port);
2490 mutex_lock(&n_port->lp_mutex);
2491 list_del(&vn_port->list);
2492 mutex_unlock(&n_port->lp_mutex);
2493 queue_work(fcoe_wq, &port->destroy_work);
2498 * fcoe_vport_disable() - change vport state
2499 * @vport: vport to bring online/offline
2500 * @disable: should the vport be disabled?
2502 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2504 struct fc_lport *lport = vport->dd_data;
2507 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2508 fc_fabric_logoff(lport);
2510 lport->boot_time = jiffies;
2511 fc_fabric_login(lport);
2512 fc_vport_setlink(lport);
2519 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2520 * @vport: fc_vport with a new symbolic name string
2522 * After generating a new symbolic name string, a new RSPN_ID request is
2523 * sent to the name server. There is no response handler, so if it fails
2524 * for some reason it will not be retried.
2526 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2528 struct fc_lport *lport = vport->dd_data;
2529 struct fc_frame *fp;
2532 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2533 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2534 fcoe_netdev(lport)->name, vport->symbolic_name);
2536 if (lport->state != LPORT_ST_READY)
2539 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2540 fp = fc_frame_alloc(lport,
2541 sizeof(struct fc_ct_hdr) +
2542 sizeof(struct fc_ns_rspn) + len);
2545 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2546 NULL, NULL, 3 * lport->r_a_tov);
2550 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2551 * @lport: the local port
2552 * @fc_lesb: the link error status block
2554 static void fcoe_get_lesb(struct fc_lport *lport,
2555 struct fc_els_lesb *fc_lesb)
2558 u32 lfc, vlfc, mdac;
2559 struct fcoe_dev_stats *devst;
2560 struct fcoe_fc_els_lesb *lesb;
2561 struct rtnl_link_stats64 temp;
2562 struct net_device *netdev = fcoe_netdev(lport);
2567 lesb = (struct fcoe_fc_els_lesb *)fc_lesb;
2568 memset(lesb, 0, sizeof(*lesb));
2569 for_each_possible_cpu(cpu) {
2570 devst = per_cpu_ptr(lport->dev_stats, cpu);
2571 lfc += devst->LinkFailureCount;
2572 vlfc += devst->VLinkFailureCount;
2573 mdac += devst->MissDiscAdvCount;
2575 lesb->lesb_link_fail = htonl(lfc);
2576 lesb->lesb_vlink_fail = htonl(vlfc);
2577 lesb->lesb_miss_fka = htonl(mdac);
2578 lesb->lesb_fcs_error = htonl(dev_get_stats(netdev, &temp)->rx_crc_errors);
2582 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2583 * @lport: the local port
2584 * @port_id: the port ID
2585 * @fp: the received frame, if any, that caused the port_id to be set.
2587 * This routine handles the case where we received a FLOGI and are
2588 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2589 * so it can set the non-mapped mode and gateway address.
2591 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2593 static void fcoe_set_port_id(struct fc_lport *lport,
2594 u32 port_id, struct fc_frame *fp)
2596 struct fcoe_port *port = lport_priv(lport);
2597 struct fcoe_interface *fcoe = port->priv;
2599 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2600 fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp);
2604 * fcoe_validate_vport_create() - Validate a vport before creating it
2605 * @vport: NPIV port to be created
2607 * This routine is meant to add validation for a vport before creating it
2608 * via fcoe_vport_create().
2609 * Current validations are:
2610 * - WWPN supplied is unique for given lport
2614 static int fcoe_validate_vport_create(struct fc_vport *vport)
2616 struct Scsi_Host *shost = vport_to_shost(vport);
2617 struct fc_lport *n_port = shost_priv(shost);
2618 struct fc_lport *vn_port;
2622 mutex_lock(&n_port->lp_mutex);
2624 wwn_to_str(vport->port_name, buf, sizeof(buf));
2625 /* Check if the wwpn is not same as that of the lport */
2626 if (!memcmp(&n_port->wwpn, &vport->port_name, sizeof(u64))) {
2627 FCOE_DBG("vport WWPN 0x%s is same as that of the "
2628 "base port WWPN\n", buf);
2633 /* Check if there is any existing vport with same wwpn */
2634 list_for_each_entry(vn_port, &n_port->vports, list) {
2635 if (!memcmp(&vn_port->wwpn, &vport->port_name, sizeof(u64))) {
2636 FCOE_DBG("vport with given WWPN 0x%s already "
2644 mutex_unlock(&n_port->lp_mutex);