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/cpu.h>
31 #include <linux/sysfs.h>
32 #include <linux/ctype.h>
33 #include <scsi/scsi_tcq.h>
34 #include <scsi/scsicam.h>
35 #include <scsi/scsi_transport.h>
36 #include <scsi/scsi_transport_fc.h>
37 #include <net/rtnetlink.h>
39 #include <scsi/fc/fc_encaps.h>
40 #include <scsi/fc/fc_fip.h>
42 #include <scsi/libfc.h>
43 #include <scsi/fc_frame.h>
44 #include <scsi/libfcoe.h>
48 MODULE_AUTHOR("Open-FCoE.org");
49 MODULE_DESCRIPTION("FCoE");
50 MODULE_LICENSE("GPL v2");
52 /* Performance tuning parameters for fcoe */
53 static unsigned int fcoe_ddp_min;
54 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
55 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
56 "Direct Data Placement (DDP).");
58 DEFINE_MUTEX(fcoe_config_mutex);
60 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
61 static DECLARE_COMPLETION(fcoe_flush_completion);
64 /* must only by accessed under the RTNL mutex */
65 LIST_HEAD(fcoe_hostlist);
66 DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
68 /* Function Prototypes */
69 static int fcoe_reset(struct Scsi_Host *);
70 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
71 static int fcoe_rcv(struct sk_buff *, struct net_device *,
72 struct packet_type *, struct net_device *);
73 static int fcoe_percpu_receive_thread(void *);
74 static void fcoe_clean_pending_queue(struct fc_lport *);
75 static void fcoe_percpu_clean(struct fc_lport *);
76 static int fcoe_link_ok(struct fc_lport *);
78 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
79 static int fcoe_hostlist_add(const struct fc_lport *);
81 static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *);
82 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
83 static void fcoe_dev_setup(void);
84 static void fcoe_dev_cleanup(void);
85 static struct fcoe_interface
86 *fcoe_hostlist_lookup_port(const struct net_device *);
88 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
89 struct packet_type *, struct net_device *);
91 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
92 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
93 static u8 *fcoe_get_src_mac(struct fc_lport *);
94 static void fcoe_destroy_work(struct work_struct *);
96 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
98 static int fcoe_ddp_done(struct fc_lport *, u16);
100 static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
102 static int fcoe_create(const char *, struct kernel_param *);
103 static int fcoe_destroy(const char *, struct kernel_param *);
105 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
106 u32 did, struct fc_frame *,
108 void (*resp)(struct fc_seq *,
111 void *, u32 timeout);
113 module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
114 __MODULE_PARM_TYPE(create, "string");
115 MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in.");
116 module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
117 __MODULE_PARM_TYPE(destroy, "string");
118 MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe");
120 /* notification function for packets from net device */
121 static struct notifier_block fcoe_notifier = {
122 .notifier_call = fcoe_device_notification,
125 /* notification function for CPU hotplug events */
126 static struct notifier_block fcoe_cpu_notifier = {
127 .notifier_call = fcoe_cpu_callback,
130 static struct scsi_transport_template *fcoe_transport_template;
131 static struct scsi_transport_template *fcoe_vport_transport_template;
133 static int fcoe_vport_destroy(struct fc_vport *);
134 static int fcoe_vport_create(struct fc_vport *, bool disabled);
135 static int fcoe_vport_disable(struct fc_vport *, bool disable);
136 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
138 static struct libfc_function_template fcoe_libfc_fcn_templ = {
139 .frame_send = fcoe_xmit,
140 .ddp_setup = fcoe_ddp_setup,
141 .ddp_done = fcoe_ddp_done,
142 .elsct_send = fcoe_elsct_send,
145 struct fc_function_template fcoe_transport_function = {
146 .show_host_node_name = 1,
147 .show_host_port_name = 1,
148 .show_host_supported_classes = 1,
149 .show_host_supported_fc4s = 1,
150 .show_host_active_fc4s = 1,
151 .show_host_maxframe_size = 1,
153 .show_host_port_id = 1,
154 .show_host_supported_speeds = 1,
155 .get_host_speed = fc_get_host_speed,
156 .show_host_speed = 1,
157 .show_host_port_type = 1,
158 .get_host_port_state = fc_get_host_port_state,
159 .show_host_port_state = 1,
160 .show_host_symbolic_name = 1,
162 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
163 .show_rport_maxframe_size = 1,
164 .show_rport_supported_classes = 1,
166 .show_host_fabric_name = 1,
167 .show_starget_node_name = 1,
168 .show_starget_port_name = 1,
169 .show_starget_port_id = 1,
170 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
171 .show_rport_dev_loss_tmo = 1,
172 .get_fc_host_stats = fc_get_host_stats,
173 .issue_fc_host_lip = fcoe_reset,
175 .terminate_rport_io = fc_rport_terminate_io,
177 .vport_create = fcoe_vport_create,
178 .vport_delete = fcoe_vport_destroy,
179 .vport_disable = fcoe_vport_disable,
180 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
182 .bsg_request = fc_lport_bsg_request,
185 struct fc_function_template fcoe_vport_transport_function = {
186 .show_host_node_name = 1,
187 .show_host_port_name = 1,
188 .show_host_supported_classes = 1,
189 .show_host_supported_fc4s = 1,
190 .show_host_active_fc4s = 1,
191 .show_host_maxframe_size = 1,
193 .show_host_port_id = 1,
194 .show_host_supported_speeds = 1,
195 .get_host_speed = fc_get_host_speed,
196 .show_host_speed = 1,
197 .show_host_port_type = 1,
198 .get_host_port_state = fc_get_host_port_state,
199 .show_host_port_state = 1,
200 .show_host_symbolic_name = 1,
202 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
203 .show_rport_maxframe_size = 1,
204 .show_rport_supported_classes = 1,
206 .show_host_fabric_name = 1,
207 .show_starget_node_name = 1,
208 .show_starget_port_name = 1,
209 .show_starget_port_id = 1,
210 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
211 .show_rport_dev_loss_tmo = 1,
212 .get_fc_host_stats = fc_get_host_stats,
213 .issue_fc_host_lip = fcoe_reset,
215 .terminate_rport_io = fc_rport_terminate_io,
217 .bsg_request = fc_lport_bsg_request,
220 static struct scsi_host_template fcoe_shost_template = {
221 .module = THIS_MODULE,
222 .name = "FCoE Driver",
223 .proc_name = FCOE_NAME,
224 .queuecommand = fc_queuecommand,
225 .eh_abort_handler = fc_eh_abort,
226 .eh_device_reset_handler = fc_eh_device_reset,
227 .eh_host_reset_handler = fc_eh_host_reset,
228 .slave_alloc = fc_slave_alloc,
229 .change_queue_depth = fc_change_queue_depth,
230 .change_queue_type = fc_change_queue_type,
233 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
234 .use_clustering = ENABLE_CLUSTERING,
235 .sg_tablesize = SG_ALL,
236 .max_sectors = 0xffff,
240 * fcoe_interface_setup() - Setup a FCoE interface
241 * @fcoe: The new FCoE interface
242 * @netdev: The net device that the fcoe interface is on
244 * Returns : 0 for success
245 * Locking: must be called with the RTNL mutex held
247 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
248 struct net_device *netdev)
250 struct fcoe_ctlr *fip = &fcoe->ctlr;
251 struct netdev_hw_addr *ha;
252 struct net_device *real_dev;
253 u8 flogi_maddr[ETH_ALEN];
254 const struct net_device_ops *ops;
256 fcoe->netdev = netdev;
258 /* Let LLD initialize for FCoE */
259 ops = netdev->netdev_ops;
260 if (ops->ndo_fcoe_enable) {
261 if (ops->ndo_fcoe_enable(netdev))
262 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
263 " specific feature for LLD.\n");
266 /* Do not support for bonding device */
267 if ((netdev->priv_flags & IFF_MASTER_ALB) ||
268 (netdev->priv_flags & IFF_SLAVE_INACTIVE) ||
269 (netdev->priv_flags & IFF_MASTER_8023AD)) {
270 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
274 /* look for SAN MAC address, if multiple SAN MACs exist, only
275 * use the first one for SPMA */
276 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
277 vlan_dev_real_dev(netdev) : netdev;
279 for_each_dev_addr(real_dev, ha) {
280 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
281 (is_valid_ether_addr(ha->addr))) {
282 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
289 /* setup Source Mac Address */
291 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
294 * Add FCoE MAC address as second unicast MAC address
295 * or enter promiscuous mode if not capable of listening
296 * for multiple unicast MACs.
298 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
299 dev_unicast_add(netdev, flogi_maddr);
301 dev_unicast_add(netdev, fip->ctl_src_addr);
302 dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
305 * setup the receive function from ethernet driver
306 * on the ethertype for the given device
308 fcoe->fcoe_packet_type.func = fcoe_rcv;
309 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
310 fcoe->fcoe_packet_type.dev = netdev;
311 dev_add_pack(&fcoe->fcoe_packet_type);
313 fcoe->fip_packet_type.func = fcoe_fip_recv;
314 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
315 fcoe->fip_packet_type.dev = netdev;
316 dev_add_pack(&fcoe->fip_packet_type);
322 * fcoe_interface_create() - Create a FCoE interface on a net device
323 * @netdev: The net device to create the FCoE interface on
325 * Returns: pointer to a struct fcoe_interface or NULL on error
327 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev)
329 struct fcoe_interface *fcoe;
332 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
334 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
339 kref_init(&fcoe->kref);
344 fcoe_ctlr_init(&fcoe->ctlr);
345 fcoe->ctlr.send = fcoe_fip_send;
346 fcoe->ctlr.update_mac = fcoe_update_src_mac;
347 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
349 err = fcoe_interface_setup(fcoe, netdev);
351 fcoe_ctlr_destroy(&fcoe->ctlr);
361 * fcoe_interface_cleanup() - Clean up a FCoE interface
362 * @fcoe: The FCoE interface to be cleaned up
364 * Caller must be holding the RTNL mutex
366 void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
368 struct net_device *netdev = fcoe->netdev;
369 struct fcoe_ctlr *fip = &fcoe->ctlr;
370 u8 flogi_maddr[ETH_ALEN];
371 const struct net_device_ops *ops;
374 * Don't listen for Ethernet packets anymore.
375 * synchronize_net() ensures that the packet handlers are not running
376 * on another CPU. dev_remove_pack() would do that, this calls the
377 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
379 __dev_remove_pack(&fcoe->fcoe_packet_type);
380 __dev_remove_pack(&fcoe->fip_packet_type);
383 /* Delete secondary MAC addresses */
384 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
385 dev_unicast_delete(netdev, flogi_maddr);
387 dev_unicast_delete(netdev, fip->ctl_src_addr);
388 dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
390 /* Tell the LLD we are done w/ FCoE */
391 ops = netdev->netdev_ops;
392 if (ops->ndo_fcoe_disable) {
393 if (ops->ndo_fcoe_disable(netdev))
394 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
395 " specific feature for LLD.\n");
400 * fcoe_interface_release() - fcoe_port kref release function
401 * @kref: Embedded reference count in an fcoe_interface struct
403 static void fcoe_interface_release(struct kref *kref)
405 struct fcoe_interface *fcoe;
406 struct net_device *netdev;
408 fcoe = container_of(kref, struct fcoe_interface, kref);
409 netdev = fcoe->netdev;
410 /* tear-down the FCoE controller */
411 fcoe_ctlr_destroy(&fcoe->ctlr);
417 * fcoe_interface_get() - Get a reference to a FCoE interface
418 * @fcoe: The FCoE interface to be held
420 static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
422 kref_get(&fcoe->kref);
426 * fcoe_interface_put() - Put a reference to a FCoE interface
427 * @fcoe: The FCoE interface to be released
429 static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
431 kref_put(&fcoe->kref, fcoe_interface_release);
435 * fcoe_fip_recv() - Handler for received FIP frames
436 * @skb: The receive skb
437 * @netdev: The associated net device
438 * @ptype: The packet_type structure which was used to register this handler
439 * @orig_dev: The original net_device the the skb was received on.
440 * (in case dev is a bond)
442 * Returns: 0 for success
444 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
445 struct packet_type *ptype,
446 struct net_device *orig_dev)
448 struct fcoe_interface *fcoe;
450 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
451 fcoe_ctlr_recv(&fcoe->ctlr, skb);
456 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
457 * @fip: The FCoE controller
458 * @skb: The FIP packet to be sent
460 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
462 skb->dev = fcoe_from_ctlr(fip)->netdev;
467 * fcoe_update_src_mac() - Update the Ethernet MAC filters
468 * @lport: The local port to update the source MAC on
469 * @addr: Unicast MAC address to add
471 * Remove any previously-set unicast MAC filter.
472 * Add secondary FCoE MAC address filter for our OUI.
474 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
476 struct fcoe_port *port = lport_priv(lport);
477 struct fcoe_interface *fcoe = port->fcoe;
480 if (!is_zero_ether_addr(port->data_src_addr))
481 dev_unicast_delete(fcoe->netdev, port->data_src_addr);
482 if (!is_zero_ether_addr(addr))
483 dev_unicast_add(fcoe->netdev, addr);
484 memcpy(port->data_src_addr, addr, ETH_ALEN);
489 * fcoe_get_src_mac() - return the Ethernet source address for an lport
490 * @lport: libfc lport
492 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
494 struct fcoe_port *port = lport_priv(lport);
496 return port->data_src_addr;
500 * fcoe_lport_config() - Set up a local port
501 * @lport: The local port to be setup
503 * Returns: 0 for success
505 static int fcoe_lport_config(struct fc_lport *lport)
509 lport->max_retry_count = 3;
510 lport->max_rport_retry_count = 3;
511 lport->e_d_tov = 2 * 1000; /* FC-FS default */
512 lport->r_a_tov = 2 * 2 * 1000;
513 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
514 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
515 lport->does_npiv = 1;
517 fc_lport_init_stats(lport);
519 /* lport fc_lport related configuration */
520 fc_lport_config(lport);
522 /* offload related configuration */
523 lport->crc_offload = 0;
524 lport->seq_offload = 0;
525 lport->lro_enabled = 0;
533 * fcoe_queue_timer() - The fcoe queue timer
534 * @lport: The local port
536 * Calls fcoe_check_wait_queue on timeout
538 static void fcoe_queue_timer(ulong lport)
540 fcoe_check_wait_queue((struct fc_lport *)lport, NULL);
544 * fcoe_netdev_config() - Set up net devive for SW FCoE
545 * @lport: The local port that is associated with the net device
546 * @netdev: The associated net device
548 * Must be called after fcoe_lport_config() as it will use local port mutex
550 * Returns: 0 for success
552 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
556 struct fcoe_interface *fcoe;
557 struct fcoe_port *port;
560 /* Setup lport private data to point to fcoe softc */
561 port = lport_priv(lport);
565 * Determine max frame size based on underlying device and optional
566 * user-configured limit. If the MFS is too low, fcoe_link_ok()
567 * will return 0, so do this first.
570 if (netdev->features & NETIF_F_FCOE_MTU) {
572 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
574 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
575 if (fc_set_mfs(lport, mfs))
578 /* offload features support */
579 if (netdev->features & NETIF_F_SG)
582 if (netdev->features & NETIF_F_FCOE_CRC) {
583 lport->crc_offload = 1;
584 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
586 if (netdev->features & NETIF_F_FSO) {
587 lport->seq_offload = 1;
588 lport->lso_max = netdev->gso_max_size;
589 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
592 if (netdev->fcoe_ddp_xid) {
593 lport->lro_enabled = 1;
594 lport->lro_xid = netdev->fcoe_ddp_xid;
595 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
598 skb_queue_head_init(&port->fcoe_pending_queue);
599 port->fcoe_pending_queue_active = 0;
600 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
604 * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN:
605 * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0.
606 * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID
608 if (netdev->priv_flags & IFF_802_1Q_VLAN)
609 vid = vlan_dev_vlan_id(netdev);
610 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
611 fc_set_wwnn(lport, wwnn);
612 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 2, vid);
613 fc_set_wwpn(lport, wwpn);
620 * fcoe_shost_config() - Set up the SCSI host associated with a local port
621 * @lport: The local port
622 * @shost: The SCSI host to associate with the local port
623 * @dev: The device associated with the SCSI host
625 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
627 * Returns: 0 for success
629 static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost,
634 /* lport scsi host config */
635 lport->host->max_lun = FCOE_MAX_LUN;
636 lport->host->max_id = FCOE_MAX_FCP_TARGET;
637 lport->host->max_channel = 0;
639 lport->host->transportt = fcoe_vport_transport_template;
641 lport->host->transportt = fcoe_transport_template;
643 /* add the new host to the SCSI-ml */
644 rc = scsi_add_host(lport->host, dev);
646 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
647 "error on scsi_add_host\n");
652 fc_host_max_npiv_vports(lport->host) = USHORT_MAX;
654 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
655 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
656 fcoe_netdev(lport)->name);
662 * fcoe_oem_match() - The match routine for the offloaded exchange manager
665 * This routine will be associated with an exchange manager (EM). When
666 * the libfc exchange handling code is looking for an EM to use it will
667 * call this routine and pass it the frame that it wishes to send. This
668 * routine will return True if the associated EM is to be used and False
669 * if the echange code should continue looking for an EM.
671 * The offload EM that this routine is associated with will handle any
672 * packets that are for SCSI read requests.
674 * Returns: True for read types I/O, otherwise returns false.
676 bool fcoe_oem_match(struct fc_frame *fp)
678 return fc_fcp_is_read(fr_fsp(fp)) &&
679 (fr_fsp(fp)->data_len > fcoe_ddp_min);
683 * fcoe_em_config() - Allocate and configure an exchange manager
684 * @lport: The local port that the new EM will be associated with
686 * Returns: 0 on success
688 static inline int fcoe_em_config(struct fc_lport *lport)
690 struct fcoe_port *port = lport_priv(lport);
691 struct fcoe_interface *fcoe = port->fcoe;
692 struct fcoe_interface *oldfcoe = NULL;
693 struct net_device *old_real_dev, *cur_real_dev;
694 u16 min_xid = FCOE_MIN_XID;
695 u16 max_xid = FCOE_MAX_XID;
698 * Check if need to allocate an em instance for
699 * offload exchange ids to be shared across all VN_PORTs/lport.
701 if (!lport->lro_enabled || !lport->lro_xid ||
702 (lport->lro_xid >= max_xid)) {
708 * Reuse existing offload em instance in case
709 * it is already allocated on real eth device
711 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
712 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
714 cur_real_dev = fcoe->netdev;
716 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
717 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
718 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
720 old_real_dev = oldfcoe->netdev;
722 if (cur_real_dev == old_real_dev) {
723 fcoe->oem = oldfcoe->oem;
729 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
730 printk(KERN_ERR "fcoe_em_config: failed to add "
731 "offload em:%p on interface:%s\n",
732 fcoe->oem, fcoe->netdev->name);
736 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
737 FCOE_MIN_XID, lport->lro_xid,
740 printk(KERN_ERR "fcoe_em_config: failed to allocate "
741 "em for offload exches on interface:%s\n",
748 * Exclude offload EM xid range from next EM xid range.
750 min_xid += lport->lro_xid + 1;
753 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
754 printk(KERN_ERR "fcoe_em_config: failed to "
755 "allocate em on interface %s\n", fcoe->netdev->name);
763 * fcoe_if_destroy() - Tear down a SW FCoE instance
764 * @lport: The local port to be destroyed
766 static void fcoe_if_destroy(struct fc_lport *lport)
768 struct fcoe_port *port = lport_priv(lport);
769 struct fcoe_interface *fcoe = port->fcoe;
770 struct net_device *netdev = fcoe->netdev;
772 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
774 /* Logout of the fabric */
775 fc_fabric_logoff(lport);
777 /* Cleanup the fc_lport */
778 fc_lport_destroy(lport);
779 fc_fcp_destroy(lport);
781 /* Stop the transmit retry timer */
782 del_timer_sync(&port->timer);
784 /* Free existing transmit skbs */
785 fcoe_clean_pending_queue(lport);
788 if (!is_zero_ether_addr(port->data_src_addr))
789 dev_unicast_delete(netdev, port->data_src_addr);
792 /* receives may not be stopped until after this */
793 fcoe_interface_put(fcoe);
795 /* Free queued packets for the per-CPU receive threads */
796 fcoe_percpu_clean(lport);
798 /* Detach from the scsi-ml */
799 fc_remove_host(lport->host);
800 scsi_remove_host(lport->host);
802 /* There are no more rports or I/O, free the EM */
803 fc_exch_mgr_free(lport);
805 /* Free memory used by statistical counters */
806 fc_lport_free_stats(lport);
808 /* Release the Scsi_Host */
809 scsi_host_put(lport->host);
813 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
814 * @lport: The local port to setup DDP for
815 * @xid: The exchange ID for this DDP transfer
816 * @sgl: The scatterlist describing this transfer
817 * @sgc: The number of sg items
819 * Returns: 0 if the DDP context was not configured
821 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
822 struct scatterlist *sgl, unsigned int sgc)
824 struct net_device *netdev = fcoe_netdev(lport);
826 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
827 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
835 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
836 * @lport: The local port to complete DDP on
837 * @xid: The exchange ID for this DDP transfer
839 * Returns: the length of data that have been completed by DDP
841 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
843 struct net_device *netdev = fcoe_netdev(lport);
845 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
846 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
851 * fcoe_if_create() - Create a FCoE instance on an interface
852 * @fcoe: The FCoE interface to create a local port on
853 * @parent: The device pointer to be the parent in sysfs for the SCSI host
854 * @npiv: Indicates if the port is a vport or not
856 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
858 * Returns: The allocated fc_lport or an error pointer
860 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
861 struct device *parent, int npiv)
863 struct net_device *netdev = fcoe->netdev;
864 struct fc_lport *lport = NULL;
865 struct fcoe_port *port;
866 struct Scsi_Host *shost;
869 * parent is only a vport if npiv is 1,
870 * but we'll only use vport in that case so go ahead and set it
872 struct fc_vport *vport = dev_to_vport(parent);
874 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
877 lport = libfc_host_alloc(&fcoe_shost_template,
878 sizeof(struct fcoe_port));
880 lport = libfc_vport_create(vport,
881 sizeof(struct fcoe_port));
884 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
889 port = lport_priv(lport);
892 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
894 /* configure a fc_lport including the exchange manager */
895 rc = fcoe_lport_config(lport);
897 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
903 FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n",
904 vport->node_name, vport->port_name);
905 fc_set_wwnn(lport, vport->node_name);
906 fc_set_wwpn(lport, vport->port_name);
909 /* configure lport network properties */
910 rc = fcoe_netdev_config(lport, netdev);
912 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
917 /* configure lport scsi host properties */
918 rc = fcoe_shost_config(lport, shost, parent);
920 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
925 /* Initialize the library */
926 rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ);
928 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
935 * fcoe_em_alloc() and fcoe_hostlist_add() both
936 * need to be atomic with respect to other changes to the
937 * hostlist since fcoe_em_alloc() looks for an existing EM
938 * instance on host list updated by fcoe_hostlist_add().
940 * This is currently handled through the fcoe_config_mutex
944 /* lport exch manager allocation */
945 rc = fcoe_em_config(lport);
947 FCOE_NETDEV_DBG(netdev, "Could not configure the EM "
948 "for the interface\n");
953 fcoe_interface_get(fcoe);
957 fc_exch_mgr_free(lport);
959 scsi_host_put(lport->host);
965 * fcoe_if_init() - Initialization routine for fcoe.ko
967 * Attaches the SW FCoE transport to the FC transport
969 * Returns: 0 on success
971 static int __init fcoe_if_init(void)
973 /* attach to scsi transport */
974 fcoe_transport_template = fc_attach_transport(&fcoe_transport_function);
975 fcoe_vport_transport_template =
976 fc_attach_transport(&fcoe_vport_transport_function);
978 if (!fcoe_transport_template) {
979 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
987 * fcoe_if_exit() - Tear down fcoe.ko
989 * Detaches the SW FCoE transport from the FC transport
991 * Returns: 0 on success
993 int __exit fcoe_if_exit(void)
995 fc_release_transport(fcoe_transport_template);
996 fc_release_transport(fcoe_vport_transport_template);
997 fcoe_transport_template = NULL;
998 fcoe_vport_transport_template = NULL;
1003 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1004 * @cpu: The CPU index of the CPU to create a receive thread for
1006 static void fcoe_percpu_thread_create(unsigned int cpu)
1008 struct fcoe_percpu_s *p;
1009 struct task_struct *thread;
1011 p = &per_cpu(fcoe_percpu, cpu);
1013 thread = kthread_create(fcoe_percpu_receive_thread,
1014 (void *)p, "fcoethread/%d", cpu);
1016 if (likely(!IS_ERR(thread))) {
1017 kthread_bind(thread, cpu);
1018 wake_up_process(thread);
1020 spin_lock_bh(&p->fcoe_rx_list.lock);
1022 spin_unlock_bh(&p->fcoe_rx_list.lock);
1027 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1028 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1030 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1031 * current CPU's Rx thread. If the thread being destroyed is bound to
1032 * the CPU processing this context the skbs will be freed.
1034 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1036 struct fcoe_percpu_s *p;
1037 struct task_struct *thread;
1038 struct page *crc_eof;
1039 struct sk_buff *skb;
1041 struct fcoe_percpu_s *p0;
1042 unsigned targ_cpu = smp_processor_id();
1043 #endif /* CONFIG_SMP */
1045 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1047 /* Prevent any new skbs from being queued for this CPU. */
1048 p = &per_cpu(fcoe_percpu, cpu);
1049 spin_lock_bh(&p->fcoe_rx_list.lock);
1052 crc_eof = p->crc_eof_page;
1053 p->crc_eof_page = NULL;
1054 p->crc_eof_offset = 0;
1055 spin_unlock_bh(&p->fcoe_rx_list.lock);
1059 * Don't bother moving the skb's if this context is running
1060 * on the same CPU that is having its thread destroyed. This
1061 * can easily happen when the module is removed.
1063 if (cpu != targ_cpu) {
1064 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1065 spin_lock_bh(&p0->fcoe_rx_list.lock);
1067 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1070 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1071 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1072 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1075 * The targeted CPU is not initialized and cannot accept
1076 * new skbs. Unlock the targeted CPU and drop the skbs
1077 * on the CPU that is going offline.
1079 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1081 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1085 * This scenario occurs when the module is being removed
1086 * and all threads are being destroyed. skbs will continue
1087 * to be shifted from the CPU thread that is being removed
1088 * to the CPU thread associated with the CPU that is processing
1089 * the module removal. Once there is only one CPU Rx thread it
1090 * will reach this case and we will drop all skbs and later
1093 spin_lock_bh(&p->fcoe_rx_list.lock);
1094 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1096 spin_unlock_bh(&p->fcoe_rx_list.lock);
1100 * This a non-SMP scenario where the singular Rx thread is
1101 * being removed. Free all skbs and stop the thread.
1103 spin_lock_bh(&p->fcoe_rx_list.lock);
1104 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1106 spin_unlock_bh(&p->fcoe_rx_list.lock);
1110 kthread_stop(thread);
1117 * fcoe_cpu_callback() - Handler for CPU hotplug events
1118 * @nfb: The callback data block
1119 * @action: The event triggering the callback
1120 * @hcpu: The index of the CPU that the event is for
1122 * This creates or destroys per-CPU data for fcoe
1124 * Returns NOTIFY_OK always.
1126 static int fcoe_cpu_callback(struct notifier_block *nfb,
1127 unsigned long action, void *hcpu)
1129 unsigned cpu = (unsigned long)hcpu;
1133 case CPU_ONLINE_FROZEN:
1134 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1135 fcoe_percpu_thread_create(cpu);
1138 case CPU_DEAD_FROZEN:
1139 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1140 fcoe_percpu_thread_destroy(cpu);
1149 * fcoe_rcv() - Receive packets from a net device
1150 * @skb: The received packet
1151 * @netdev: The net device that the packet was received on
1152 * @ptype: The packet type context
1153 * @olddev: The last device net device
1155 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1156 * FC frame and passes the frame to libfc.
1158 * Returns: 0 for success
1160 int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1161 struct packet_type *ptype, struct net_device *olddev)
1163 struct fc_lport *lport;
1164 struct fcoe_rcv_info *fr;
1165 struct fcoe_interface *fcoe;
1166 struct fc_frame_header *fh;
1167 struct fcoe_percpu_s *fps;
1170 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1171 lport = fcoe->ctlr.lp;
1172 if (unlikely(!lport)) {
1173 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1176 if (!lport->link_up)
1179 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1180 "data:%p tail:%p end:%p sum:%d dev:%s",
1181 skb->len, skb->data_len, skb->head, skb->data,
1182 skb_tail_pointer(skb), skb_end_pointer(skb),
1183 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1185 /* check for FCOE packet type */
1186 if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
1187 FCOE_NETDEV_DBG(netdev, "Wrong FC type frame");
1192 * Check for minimum frame length, and make sure required FCoE
1193 * and FC headers are pulled into the linear data area.
1195 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1196 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1199 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1200 fh = (struct fc_frame_header *) skb_transport_header(skb);
1202 fr = fcoe_dev_from_skb(skb);
1207 * In case the incoming frame's exchange is originated from
1208 * the initiator, then received frame's exchange id is ANDed
1209 * with fc_cpu_mask bits to get the same cpu on which exchange
1210 * was originated, otherwise just use the current cpu.
1212 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1213 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1215 cpu = smp_processor_id();
1217 fps = &per_cpu(fcoe_percpu, cpu);
1218 spin_lock_bh(&fps->fcoe_rx_list.lock);
1219 if (unlikely(!fps->thread)) {
1221 * The targeted CPU is not ready, let's target
1222 * the first CPU now. For non-SMP systems this
1223 * will check the same CPU twice.
1225 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1226 "ready for incoming skb- using first online "
1229 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1230 cpu = first_cpu(cpu_online_map);
1231 fps = &per_cpu(fcoe_percpu, cpu);
1232 spin_lock_bh(&fps->fcoe_rx_list.lock);
1234 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1240 * We now have a valid CPU that we're targeting for
1241 * this skb. We also have this receive thread locked,
1242 * so we're free to queue skbs into it's queue.
1244 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1245 if (fps->fcoe_rx_list.qlen == 1)
1246 wake_up_process(fps->thread);
1248 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1252 fc_lport_get_stats(lport)->ErrorFrames++;
1260 * fcoe_start_io() - Start FCoE I/O
1261 * @skb: The packet to be transmitted
1263 * This routine is called from the net device to start transmitting
1266 * Returns: 0 for success
1268 static inline int fcoe_start_io(struct sk_buff *skb)
1270 struct sk_buff *nskb;
1273 nskb = skb_clone(skb, GFP_ATOMIC);
1274 rc = dev_queue_xmit(nskb);
1282 * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1283 * @skb: The packet to be transmitted
1284 * @tlen: The total length of the trailer
1286 * This routine allocates a page for frame trailers. The page is re-used if
1287 * there is enough room left on it for the current trailer. If there isn't
1288 * enough buffer left a new page is allocated for the trailer. Reference to
1289 * the page from this function as well as the skbs using the page fragments
1290 * ensure that the page is freed at the appropriate time.
1292 * Returns: 0 for success
1294 static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
1296 struct fcoe_percpu_s *fps;
1299 fps = &get_cpu_var(fcoe_percpu);
1300 page = fps->crc_eof_page;
1302 page = alloc_page(GFP_ATOMIC);
1304 put_cpu_var(fcoe_percpu);
1307 fps->crc_eof_page = page;
1308 fps->crc_eof_offset = 0;
1312 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
1313 fps->crc_eof_offset, tlen);
1315 skb->data_len += tlen;
1316 skb->truesize += tlen;
1317 fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
1319 if (fps->crc_eof_offset >= PAGE_SIZE) {
1320 fps->crc_eof_page = NULL;
1321 fps->crc_eof_offset = 0;
1324 put_cpu_var(fcoe_percpu);
1329 * fcoe_fc_crc() - Calculates the CRC for a given frame
1330 * @fp: The frame to be checksumed
1332 * This uses crc32() routine to calculate the CRC for a frame
1334 * Return: The 32 bit CRC value
1336 u32 fcoe_fc_crc(struct fc_frame *fp)
1338 struct sk_buff *skb = fp_skb(fp);
1339 struct skb_frag_struct *frag;
1340 unsigned char *data;
1341 unsigned long off, len, clen;
1345 crc = crc32(~0, skb->data, skb_headlen(skb));
1347 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1348 frag = &skb_shinfo(skb)->frags[i];
1349 off = frag->page_offset;
1352 clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
1353 data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
1354 KM_SKB_DATA_SOFTIRQ);
1355 crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
1356 kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
1365 * fcoe_xmit() - Transmit a FCoE frame
1366 * @lport: The local port that the frame is to be transmitted for
1367 * @fp: The frame to be transmitted
1369 * Return: 0 for success
1371 int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1376 struct fcoe_crc_eof *cp;
1377 struct sk_buff *skb;
1378 struct fcoe_dev_stats *stats;
1379 struct fc_frame_header *fh;
1380 unsigned int hlen; /* header length implies the version */
1381 unsigned int tlen; /* trailer length */
1382 unsigned int elen; /* eth header, may include vlan */
1383 struct fcoe_port *port = lport_priv(lport);
1384 struct fcoe_interface *fcoe = port->fcoe;
1386 struct fcoe_hdr *hp;
1388 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1390 fh = fc_frame_header_get(fp);
1392 wlen = skb->len / FCOE_WORD_TO_BYTE;
1394 if (!lport->link_up) {
1399 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1400 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1406 elen = sizeof(struct ethhdr);
1407 hlen = sizeof(struct fcoe_hdr);
1408 tlen = sizeof(struct fcoe_crc_eof);
1409 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1412 if (likely(lport->crc_offload)) {
1413 skb->ip_summed = CHECKSUM_PARTIAL;
1414 skb->csum_start = skb_headroom(skb);
1415 skb->csum_offset = skb->len;
1418 skb->ip_summed = CHECKSUM_NONE;
1419 crc = fcoe_fc_crc(fp);
1422 /* copy port crc and eof to the skb buff */
1423 if (skb_is_nonlinear(skb)) {
1425 if (fcoe_get_paged_crc_eof(skb, tlen)) {
1429 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1430 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1431 + frag->page_offset;
1433 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1436 memset(cp, 0, sizeof(*cp));
1438 cp->fcoe_crc32 = cpu_to_le32(~crc);
1440 if (skb_is_nonlinear(skb)) {
1441 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1445 /* adjust skb network/transport offsets to match mac/fcoe/port */
1446 skb_push(skb, elen + hlen);
1447 skb_reset_mac_header(skb);
1448 skb_reset_network_header(skb);
1449 skb->mac_len = elen;
1450 skb->protocol = htons(ETH_P_FCOE);
1451 skb->dev = fcoe->netdev;
1453 /* fill up mac and fcoe headers */
1455 eh->h_proto = htons(ETH_P_FCOE);
1456 if (fcoe->ctlr.map_dest)
1457 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
1459 /* insert GW address */
1460 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1462 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1463 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1465 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1467 hp = (struct fcoe_hdr *)(eh + 1);
1468 memset(hp, 0, sizeof(*hp));
1470 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1473 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1474 if (lport->seq_offload && fr_max_payload(fp)) {
1475 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1476 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1478 skb_shinfo(skb)->gso_type = 0;
1479 skb_shinfo(skb)->gso_size = 0;
1481 /* update tx stats: regardless if LLD fails */
1482 stats = fc_lport_get_stats(lport);
1484 stats->TxWords += wlen;
1486 /* send down to lld */
1488 if (port->fcoe_pending_queue.qlen)
1489 fcoe_check_wait_queue(lport, skb);
1490 else if (fcoe_start_io(skb))
1491 fcoe_check_wait_queue(lport, skb);
1497 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1498 * @skb: The completed skb (argument required by destructor)
1500 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1502 complete(&fcoe_flush_completion);
1506 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1507 * @arg: The per-CPU context
1509 * Return: 0 for success
1511 int fcoe_percpu_receive_thread(void *arg)
1513 struct fcoe_percpu_s *p = arg;
1515 struct fc_lport *lport;
1516 struct fcoe_rcv_info *fr;
1517 struct fcoe_dev_stats *stats;
1518 struct fc_frame_header *fh;
1519 struct sk_buff *skb;
1520 struct fcoe_crc_eof crc_eof;
1521 struct fc_frame *fp;
1523 struct fcoe_port *port;
1524 struct fcoe_hdr *hp;
1526 set_user_nice(current, -20);
1528 while (!kthread_should_stop()) {
1530 spin_lock_bh(&p->fcoe_rx_list.lock);
1531 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1532 set_current_state(TASK_INTERRUPTIBLE);
1533 spin_unlock_bh(&p->fcoe_rx_list.lock);
1535 set_current_state(TASK_RUNNING);
1536 if (kthread_should_stop())
1538 spin_lock_bh(&p->fcoe_rx_list.lock);
1540 spin_unlock_bh(&p->fcoe_rx_list.lock);
1541 fr = fcoe_dev_from_skb(skb);
1543 if (unlikely(!lport)) {
1544 if (skb->destructor != fcoe_percpu_flush_done)
1545 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1550 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1551 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1552 skb->len, skb->data_len,
1553 skb->head, skb->data, skb_tail_pointer(skb),
1554 skb_end_pointer(skb), skb->csum,
1555 skb->dev ? skb->dev->name : "<NULL>");
1558 * Save source MAC address before discarding header.
1560 port = lport_priv(lport);
1561 if (skb_is_nonlinear(skb))
1562 skb_linearize(skb); /* not ideal */
1563 mac = eth_hdr(skb)->h_source;
1566 * Frame length checks and setting up the header pointers
1567 * was done in fcoe_rcv already.
1569 hp = (struct fcoe_hdr *) skb_network_header(skb);
1570 fh = (struct fc_frame_header *) skb_transport_header(skb);
1572 stats = fc_lport_get_stats(lport);
1573 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1574 if (stats->ErrorFrames < 5)
1575 printk(KERN_WARNING "fcoe: FCoE version "
1576 "mismatch: The frame has "
1577 "version %x, but the "
1578 "initiator supports version "
1579 "%x\n", FC_FCOE_DECAPS_VER(hp),
1581 stats->ErrorFrames++;
1586 skb_pull(skb, sizeof(struct fcoe_hdr));
1587 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1590 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1592 fp = (struct fc_frame *)skb;
1595 fr_sof(fp) = hp->fcoe_sof;
1597 /* Copy out the CRC and EOF trailer for access */
1598 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
1602 fr_eof(fp) = crc_eof.fcoe_eof;
1603 fr_crc(fp) = crc_eof.fcoe_crc32;
1604 if (pskb_trim(skb, fr_len)) {
1610 * We only check CRC if no offload is available and if it is
1611 * it's solicited data, in which case, the FCP layer would
1612 * check it during the copy.
1614 if (lport->crc_offload &&
1615 skb->ip_summed == CHECKSUM_UNNECESSARY)
1616 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1618 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1620 fh = fc_frame_header_get(fp);
1621 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
1622 fh->fh_type == FC_TYPE_FCP) {
1623 fc_exch_recv(lport, fp);
1626 if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
1627 if (le32_to_cpu(fr_crc(fp)) !=
1628 ~crc32(~0, skb->data, fr_len)) {
1629 if (stats->InvalidCRCCount < 5)
1630 printk(KERN_WARNING "fcoe: dropping "
1631 "frame with CRC error\n");
1632 stats->InvalidCRCCount++;
1633 stats->ErrorFrames++;
1637 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1639 fc_exch_recv(lport, fp);
1645 * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
1646 * @lport: The local port whose backlog is to be cleared
1648 * This empties the wait_queue, dequeues the head of the wait_queue queue
1649 * and calls fcoe_start_io() for each packet. If all skb have been
1650 * transmitted it returns the qlen. If an error occurs it restores
1651 * wait_queue (to try again later) and returns -1.
1653 * The wait_queue is used when the skb transmit fails. The failed skb
1654 * will go in the wait_queue which will be emptied by the timer function or
1655 * by the next skb transmit.
1657 static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
1659 struct fcoe_port *port = lport_priv(lport);
1662 spin_lock_bh(&port->fcoe_pending_queue.lock);
1665 __skb_queue_tail(&port->fcoe_pending_queue, skb);
1667 if (port->fcoe_pending_queue_active)
1669 port->fcoe_pending_queue_active = 1;
1671 while (port->fcoe_pending_queue.qlen) {
1672 /* keep qlen > 0 until fcoe_start_io succeeds */
1673 port->fcoe_pending_queue.qlen++;
1674 skb = __skb_dequeue(&port->fcoe_pending_queue);
1676 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1677 rc = fcoe_start_io(skb);
1678 spin_lock_bh(&port->fcoe_pending_queue.lock);
1681 __skb_queue_head(&port->fcoe_pending_queue, skb);
1682 /* undo temporary increment above */
1683 port->fcoe_pending_queue.qlen--;
1686 /* undo temporary increment above */
1687 port->fcoe_pending_queue.qlen--;
1690 if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
1692 if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
1693 mod_timer(&port->timer, jiffies + 2);
1694 port->fcoe_pending_queue_active = 0;
1696 if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
1698 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1703 * fcoe_dev_setup() - Setup the link change notification interface
1705 static void fcoe_dev_setup(void)
1707 register_netdevice_notifier(&fcoe_notifier);
1711 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1713 static void fcoe_dev_cleanup(void)
1715 unregister_netdevice_notifier(&fcoe_notifier);
1719 * fcoe_device_notification() - Handler for net device events
1720 * @notifier: The context of the notification
1721 * @event: The type of event
1722 * @ptr: The net device that the event was on
1724 * This function is called by the Ethernet driver in case of link change event.
1726 * Returns: 0 for success
1728 static int fcoe_device_notification(struct notifier_block *notifier,
1729 ulong event, void *ptr)
1731 struct fc_lport *lport = NULL;
1732 struct net_device *netdev = ptr;
1733 struct fcoe_interface *fcoe;
1734 struct fcoe_port *port;
1735 struct fcoe_dev_stats *stats;
1736 u32 link_possible = 1;
1740 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1741 if (fcoe->netdev == netdev) {
1742 lport = fcoe->ctlr.lp;
1753 case NETDEV_GOING_DOWN:
1759 case NETDEV_CHANGEMTU:
1760 if (netdev->features & NETIF_F_FCOE_MTU)
1762 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1763 sizeof(struct fcoe_crc_eof));
1764 if (mfs >= FC_MIN_MAX_FRAME)
1765 fc_set_mfs(lport, mfs);
1767 case NETDEV_REGISTER:
1769 case NETDEV_UNREGISTER:
1770 list_del(&fcoe->list);
1771 port = lport_priv(fcoe->ctlr.lp);
1772 fcoe_interface_cleanup(fcoe);
1773 schedule_work(&port->destroy_work);
1777 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1778 "from netdev netlink\n", event);
1780 if (link_possible && !fcoe_link_ok(lport))
1781 fcoe_ctlr_link_up(&fcoe->ctlr);
1782 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1783 stats = fc_lport_get_stats(lport);
1784 stats->LinkFailureCount++;
1785 fcoe_clean_pending_queue(lport);
1792 * fcoe_if_to_netdev() - Parse a name buffer to get a net device
1793 * @buffer: The name of the net device
1795 * Returns: NULL or a ptr to net_device
1797 static struct net_device *fcoe_if_to_netdev(const char *buffer)
1800 char ifname[IFNAMSIZ + 2];
1803 strlcpy(ifname, buffer, IFNAMSIZ);
1804 cp = ifname + strlen(ifname);
1805 while (--cp >= ifname && *cp == '\n')
1807 return dev_get_by_name(&init_net, ifname);
1813 * fcoe_destroy() - Destroy a FCoE interface
1814 * @buffer: The name of the Ethernet interface to be destroyed
1815 * @kp: The associated kernel parameter
1817 * Called from sysfs.
1819 * Returns: 0 for success
1821 static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
1823 struct fcoe_interface *fcoe;
1824 struct net_device *netdev;
1827 mutex_lock(&fcoe_config_mutex);
1828 #ifdef CONFIG_FCOE_MODULE
1830 * Make sure the module has been initialized, and is not about to be
1831 * removed. Module paramter sysfs files are writable before the
1832 * module_init function is called and after module_exit.
1834 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1840 netdev = fcoe_if_to_netdev(buffer);
1847 fcoe = fcoe_hostlist_lookup_port(netdev);
1853 list_del(&fcoe->list);
1854 fcoe_interface_cleanup(fcoe);
1856 fcoe_if_destroy(fcoe->ctlr.lp);
1860 mutex_unlock(&fcoe_config_mutex);
1865 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1866 * @work: Handle to the FCoE port to be destroyed
1868 static void fcoe_destroy_work(struct work_struct *work)
1870 struct fcoe_port *port;
1872 port = container_of(work, struct fcoe_port, destroy_work);
1873 mutex_lock(&fcoe_config_mutex);
1874 fcoe_if_destroy(port->lport);
1875 mutex_unlock(&fcoe_config_mutex);
1879 * fcoe_create() - Create a fcoe interface
1880 * @buffer: The name of the Ethernet interface to create on
1881 * @kp: The associated kernel param
1883 * Called from sysfs.
1885 * Returns: 0 for success
1887 static int fcoe_create(const char *buffer, struct kernel_param *kp)
1890 struct fcoe_interface *fcoe;
1891 struct fc_lport *lport;
1892 struct net_device *netdev;
1894 mutex_lock(&fcoe_config_mutex);
1895 #ifdef CONFIG_FCOE_MODULE
1897 * Make sure the module has been initialized, and is not about to be
1898 * removed. Module paramter sysfs files are writable before the
1899 * module_init function is called and after module_exit.
1901 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1908 netdev = fcoe_if_to_netdev(buffer);
1914 /* look for existing lport */
1915 if (fcoe_hostlist_lookup(netdev)) {
1920 fcoe = fcoe_interface_create(netdev);
1926 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
1927 if (IS_ERR(lport)) {
1928 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
1931 fcoe_interface_cleanup(fcoe);
1935 /* Make this the "master" N_Port */
1936 fcoe->ctlr.lp = lport;
1938 /* add to lports list */
1939 fcoe_hostlist_add(lport);
1941 /* start FIP Discovery and FLOGI */
1942 lport->boot_time = jiffies;
1943 fc_fabric_login(lport);
1944 if (!fcoe_link_ok(lport))
1945 fcoe_ctlr_link_up(&fcoe->ctlr);
1950 * Release from init in fcoe_interface_create(), on success lport
1951 * should be holding a reference taken in fcoe_if_create().
1953 fcoe_interface_put(fcoe);
1958 mutex_unlock(&fcoe_config_mutex);
1963 * fcoe_link_ok() - Check if the link is OK for a local port
1964 * @lport: The local port to check link on
1966 * Any permanently-disqualifying conditions have been previously checked.
1967 * This also updates the speed setting, which may change with link for 100/1000.
1969 * This function should probably be checking for PAUSE support at some point
1970 * in the future. Currently Per-priority-pause is not determinable using
1971 * ethtool, so we shouldn't be restrictive until that problem is resolved.
1973 * Returns: 0 if link is OK for use by FCoE.
1976 int fcoe_link_ok(struct fc_lport *lport)
1978 struct fcoe_port *port = lport_priv(lport);
1979 struct net_device *netdev = port->fcoe->netdev;
1980 struct ethtool_cmd ecmd = { ETHTOOL_GSET };
1982 if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) &&
1983 (!dev_ethtool_get_settings(netdev, &ecmd))) {
1984 lport->link_supported_speeds &=
1985 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
1986 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
1987 SUPPORTED_1000baseT_Full))
1988 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
1989 if (ecmd.supported & SUPPORTED_10000baseT_Full)
1990 lport->link_supported_speeds |=
1991 FC_PORTSPEED_10GBIT;
1992 if (ecmd.speed == SPEED_1000)
1993 lport->link_speed = FC_PORTSPEED_1GBIT;
1994 if (ecmd.speed == SPEED_10000)
1995 lport->link_speed = FC_PORTSPEED_10GBIT;
2003 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2004 * @lport: The local port whose skbs are to be cleared
2006 * Must be called with fcoe_create_mutex held to single-thread completion.
2008 * This flushes the pending skbs by adding a new skb to each queue and
2009 * waiting until they are all freed. This assures us that not only are
2010 * there no packets that will be handled by the lport, but also that any
2011 * threads already handling packet have returned.
2013 void fcoe_percpu_clean(struct fc_lport *lport)
2015 struct fcoe_percpu_s *pp;
2016 struct fcoe_rcv_info *fr;
2017 struct sk_buff_head *list;
2018 struct sk_buff *skb, *next;
2019 struct sk_buff *head;
2022 for_each_possible_cpu(cpu) {
2023 pp = &per_cpu(fcoe_percpu, cpu);
2024 spin_lock_bh(&pp->fcoe_rx_list.lock);
2025 list = &pp->fcoe_rx_list;
2027 for (skb = head; skb != (struct sk_buff *)list;
2030 fr = fcoe_dev_from_skb(skb);
2031 if (fr->fr_dev == lport) {
2032 __skb_unlink(skb, list);
2037 if (!pp->thread || !cpu_online(cpu)) {
2038 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2042 skb = dev_alloc_skb(0);
2044 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2047 skb->destructor = fcoe_percpu_flush_done;
2049 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2050 if (pp->fcoe_rx_list.qlen == 1)
2051 wake_up_process(pp->thread);
2052 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2054 wait_for_completion(&fcoe_flush_completion);
2059 * fcoe_clean_pending_queue() - Dequeue a skb and free it
2060 * @lport: The local port to dequeue a skb on
2062 void fcoe_clean_pending_queue(struct fc_lport *lport)
2064 struct fcoe_port *port = lport_priv(lport);
2065 struct sk_buff *skb;
2067 spin_lock_bh(&port->fcoe_pending_queue.lock);
2068 while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
2069 spin_unlock_bh(&port->fcoe_pending_queue.lock);
2071 spin_lock_bh(&port->fcoe_pending_queue.lock);
2073 spin_unlock_bh(&port->fcoe_pending_queue.lock);
2077 * fcoe_reset() - Reset a local port
2078 * @shost: The SCSI host associated with the local port to be reset
2080 * Returns: Always 0 (return value required by FC transport template)
2082 int fcoe_reset(struct Scsi_Host *shost)
2084 struct fc_lport *lport = shost_priv(shost);
2085 fc_lport_reset(lport);
2090 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2091 * @netdev: The net device used as a key
2093 * Locking: Must be called with the RNL mutex held.
2095 * Returns: NULL or the FCoE interface
2097 static struct fcoe_interface *
2098 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2100 struct fcoe_interface *fcoe;
2102 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2103 if (fcoe->netdev == netdev)
2110 * fcoe_hostlist_lookup() - Find the local port associated with a
2112 * @netdev: The netdevice used as a key
2114 * Locking: Must be called with the RTNL mutex held
2116 * Returns: NULL or the local port
2118 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2120 struct fcoe_interface *fcoe;
2122 fcoe = fcoe_hostlist_lookup_port(netdev);
2123 return (fcoe) ? fcoe->ctlr.lp : NULL;
2127 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2128 * port to the hostlist
2129 * @lport: The local port that identifies the FCoE interface to be added
2131 * Locking: must be called with the RTNL mutex held
2133 * Returns: 0 for success
2135 static int fcoe_hostlist_add(const struct fc_lport *lport)
2137 struct fcoe_interface *fcoe;
2138 struct fcoe_port *port;
2140 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2142 port = lport_priv(lport);
2144 list_add_tail(&fcoe->list, &fcoe_hostlist);
2150 * fcoe_init() - Initialize fcoe.ko
2152 * Returns: 0 on success, or a negative value on failure
2154 static int __init fcoe_init(void)
2156 struct fcoe_percpu_s *p;
2160 mutex_lock(&fcoe_config_mutex);
2162 for_each_possible_cpu(cpu) {
2163 p = &per_cpu(fcoe_percpu, cpu);
2164 skb_queue_head_init(&p->fcoe_rx_list);
2167 for_each_online_cpu(cpu)
2168 fcoe_percpu_thread_create(cpu);
2170 /* Initialize per CPU interrupt thread */
2171 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2175 /* Setup link change notification */
2178 rc = fcoe_if_init();
2182 mutex_unlock(&fcoe_config_mutex);
2186 for_each_online_cpu(cpu) {
2187 fcoe_percpu_thread_destroy(cpu);
2189 mutex_unlock(&fcoe_config_mutex);
2192 module_init(fcoe_init);
2195 * fcoe_exit() - Clean up fcoe.ko
2197 * Returns: 0 on success or a negative value on failure
2199 static void __exit fcoe_exit(void)
2201 struct fcoe_interface *fcoe, *tmp;
2202 struct fcoe_port *port;
2205 mutex_lock(&fcoe_config_mutex);
2209 /* releases the associated fcoe hosts */
2211 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2212 list_del(&fcoe->list);
2213 port = lport_priv(fcoe->ctlr.lp);
2214 fcoe_interface_cleanup(fcoe);
2215 schedule_work(&port->destroy_work);
2219 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2221 for_each_online_cpu(cpu)
2222 fcoe_percpu_thread_destroy(cpu);
2224 mutex_unlock(&fcoe_config_mutex);
2226 /* flush any asyncronous interface destroys,
2227 * this should happen after the netdev notifier is unregistered */
2228 flush_scheduled_work();
2229 /* That will flush out all the N_Ports on the hostlist, but now we
2230 * may have NPIV VN_Ports scheduled for destruction */
2231 flush_scheduled_work();
2233 /* detach from scsi transport
2234 * must happen after all destroys are done, therefor after the flush */
2237 module_exit(fcoe_exit);
2240 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2241 * @seq: active sequence in the FLOGI or FDISC exchange
2242 * @fp: response frame, or error encoded in a pointer (timeout)
2243 * @arg: pointer the the fcoe_ctlr structure
2245 * This handles MAC address managment for FCoE, then passes control on to
2246 * the libfc FLOGI response handler.
2248 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2250 struct fcoe_ctlr *fip = arg;
2251 struct fc_exch *exch = fc_seq_exch(seq);
2252 struct fc_lport *lport = exch->lp;
2258 mac = fr_cb(fp)->granted_mac;
2259 if (is_zero_ether_addr(mac)) {
2261 if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
2266 fcoe_update_src_mac(lport, mac);
2268 fc_lport_flogi_resp(seq, fp, lport);
2272 * fcoe_logo_resp() - FCoE specific LOGO response handler
2273 * @seq: active sequence in the LOGO exchange
2274 * @fp: response frame, or error encoded in a pointer (timeout)
2275 * @arg: pointer the the fcoe_ctlr structure
2277 * This handles MAC address managment for FCoE, then passes control on to
2278 * the libfc LOGO response handler.
2280 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2282 struct fc_lport *lport = arg;
2283 static u8 zero_mac[ETH_ALEN] = { 0 };
2286 fcoe_update_src_mac(lport, zero_mac);
2287 fc_lport_logo_resp(seq, fp, lport);
2291 * fcoe_elsct_send - FCoE specific ELS handler
2293 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2294 * using FCoE specific response handlers and passing the FIP controller as
2295 * the argument (the lport is still available from the exchange).
2297 * Most of the work here is just handed off to the libfc routine.
2299 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2300 struct fc_frame *fp, unsigned int op,
2301 void (*resp)(struct fc_seq *,
2304 void *arg, u32 timeout)
2306 struct fcoe_port *port = lport_priv(lport);
2307 struct fcoe_interface *fcoe = port->fcoe;
2308 struct fcoe_ctlr *fip = &fcoe->ctlr;
2309 struct fc_frame_header *fh = fc_frame_header_get(fp);
2314 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2317 /* only hook onto fabric logouts, not port logouts */
2318 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2320 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2323 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2327 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2328 * @vport: fc_vport object to create a new fc_host for
2329 * @disabled: start the new fc_host in a disabled state by default?
2331 * Returns: 0 for success
2333 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2335 struct Scsi_Host *shost = vport_to_shost(vport);
2336 struct fc_lport *n_port = shost_priv(shost);
2337 struct fcoe_port *port = lport_priv(n_port);
2338 struct fcoe_interface *fcoe = port->fcoe;
2339 struct net_device *netdev = fcoe->netdev;
2340 struct fc_lport *vn_port;
2342 mutex_lock(&fcoe_config_mutex);
2343 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2344 mutex_unlock(&fcoe_config_mutex);
2346 if (IS_ERR(vn_port)) {
2347 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2353 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2355 vn_port->boot_time = jiffies;
2356 fc_fabric_login(vn_port);
2357 fc_vport_setlink(vn_port);
2363 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2364 * @vport: fc_vport object that is being destroyed
2366 * Returns: 0 for success
2368 static int fcoe_vport_destroy(struct fc_vport *vport)
2370 struct Scsi_Host *shost = vport_to_shost(vport);
2371 struct fc_lport *n_port = shost_priv(shost);
2372 struct fc_lport *vn_port = vport->dd_data;
2373 struct fcoe_port *port = lport_priv(vn_port);
2375 mutex_lock(&n_port->lp_mutex);
2376 list_del(&vn_port->list);
2377 mutex_unlock(&n_port->lp_mutex);
2378 schedule_work(&port->destroy_work);
2383 * fcoe_vport_disable() - change vport state
2384 * @vport: vport to bring online/offline
2385 * @disable: should the vport be disabled?
2387 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2389 struct fc_lport *lport = vport->dd_data;
2392 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2393 fc_fabric_logoff(lport);
2395 lport->boot_time = jiffies;
2396 fc_fabric_login(lport);
2397 fc_vport_setlink(lport);
2404 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2405 * @vport: fc_vport with a new symbolic name string
2407 * After generating a new symbolic name string, a new RSPN_ID request is
2408 * sent to the name server. There is no response handler, so if it fails
2409 * for some reason it will not be retried.
2411 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2413 struct fc_lport *lport = vport->dd_data;
2414 struct fc_frame *fp;
2417 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2418 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2419 fcoe_netdev(lport)->name, vport->symbolic_name);
2421 if (lport->state != LPORT_ST_READY)
2424 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2425 fp = fc_frame_alloc(lport,
2426 sizeof(struct fc_ct_hdr) +
2427 sizeof(struct fc_ns_rspn) + len);
2430 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2431 NULL, NULL, lport->e_d_tov);