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);
112 static void fcoe_recv_frame(struct sk_buff *skb);
114 module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
115 __MODULE_PARM_TYPE(create, "string");
116 MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in.");
117 module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
118 __MODULE_PARM_TYPE(destroy, "string");
119 MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe");
121 /* notification function for packets from net device */
122 static struct notifier_block fcoe_notifier = {
123 .notifier_call = fcoe_device_notification,
126 /* notification function for CPU hotplug events */
127 static struct notifier_block fcoe_cpu_notifier = {
128 .notifier_call = fcoe_cpu_callback,
131 static struct scsi_transport_template *fcoe_transport_template;
132 static struct scsi_transport_template *fcoe_vport_transport_template;
134 static int fcoe_vport_destroy(struct fc_vport *);
135 static int fcoe_vport_create(struct fc_vport *, bool disabled);
136 static int fcoe_vport_disable(struct fc_vport *, bool disable);
137 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
139 static struct libfc_function_template fcoe_libfc_fcn_templ = {
140 .frame_send = fcoe_xmit,
141 .ddp_setup = fcoe_ddp_setup,
142 .ddp_done = fcoe_ddp_done,
143 .elsct_send = fcoe_elsct_send,
146 struct fc_function_template fcoe_transport_function = {
147 .show_host_node_name = 1,
148 .show_host_port_name = 1,
149 .show_host_supported_classes = 1,
150 .show_host_supported_fc4s = 1,
151 .show_host_active_fc4s = 1,
152 .show_host_maxframe_size = 1,
154 .show_host_port_id = 1,
155 .show_host_supported_speeds = 1,
156 .get_host_speed = fc_get_host_speed,
157 .show_host_speed = 1,
158 .show_host_port_type = 1,
159 .get_host_port_state = fc_get_host_port_state,
160 .show_host_port_state = 1,
161 .show_host_symbolic_name = 1,
163 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
164 .show_rport_maxframe_size = 1,
165 .show_rport_supported_classes = 1,
167 .show_host_fabric_name = 1,
168 .show_starget_node_name = 1,
169 .show_starget_port_name = 1,
170 .show_starget_port_id = 1,
171 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
172 .show_rport_dev_loss_tmo = 1,
173 .get_fc_host_stats = fc_get_host_stats,
174 .issue_fc_host_lip = fcoe_reset,
176 .terminate_rport_io = fc_rport_terminate_io,
178 .vport_create = fcoe_vport_create,
179 .vport_delete = fcoe_vport_destroy,
180 .vport_disable = fcoe_vport_disable,
181 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
183 .bsg_request = fc_lport_bsg_request,
186 struct fc_function_template fcoe_vport_transport_function = {
187 .show_host_node_name = 1,
188 .show_host_port_name = 1,
189 .show_host_supported_classes = 1,
190 .show_host_supported_fc4s = 1,
191 .show_host_active_fc4s = 1,
192 .show_host_maxframe_size = 1,
194 .show_host_port_id = 1,
195 .show_host_supported_speeds = 1,
196 .get_host_speed = fc_get_host_speed,
197 .show_host_speed = 1,
198 .show_host_port_type = 1,
199 .get_host_port_state = fc_get_host_port_state,
200 .show_host_port_state = 1,
201 .show_host_symbolic_name = 1,
203 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
204 .show_rport_maxframe_size = 1,
205 .show_rport_supported_classes = 1,
207 .show_host_fabric_name = 1,
208 .show_starget_node_name = 1,
209 .show_starget_port_name = 1,
210 .show_starget_port_id = 1,
211 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
212 .show_rport_dev_loss_tmo = 1,
213 .get_fc_host_stats = fc_get_host_stats,
214 .issue_fc_host_lip = fcoe_reset,
216 .terminate_rport_io = fc_rport_terminate_io,
218 .bsg_request = fc_lport_bsg_request,
221 static struct scsi_host_template fcoe_shost_template = {
222 .module = THIS_MODULE,
223 .name = "FCoE Driver",
224 .proc_name = FCOE_NAME,
225 .queuecommand = fc_queuecommand,
226 .eh_abort_handler = fc_eh_abort,
227 .eh_device_reset_handler = fc_eh_device_reset,
228 .eh_host_reset_handler = fc_eh_host_reset,
229 .slave_alloc = fc_slave_alloc,
230 .change_queue_depth = fc_change_queue_depth,
231 .change_queue_type = fc_change_queue_type,
234 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
235 .use_clustering = ENABLE_CLUSTERING,
236 .sg_tablesize = SG_ALL,
237 .max_sectors = 0xffff,
241 * fcoe_interface_setup() - Setup a FCoE interface
242 * @fcoe: The new FCoE interface
243 * @netdev: The net device that the fcoe interface is on
245 * Returns : 0 for success
246 * Locking: must be called with the RTNL mutex held
248 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
249 struct net_device *netdev)
251 struct fcoe_ctlr *fip = &fcoe->ctlr;
252 struct netdev_hw_addr *ha;
253 struct net_device *real_dev;
254 u8 flogi_maddr[ETH_ALEN];
255 const struct net_device_ops *ops;
257 fcoe->netdev = netdev;
259 /* Let LLD initialize for FCoE */
260 ops = netdev->netdev_ops;
261 if (ops->ndo_fcoe_enable) {
262 if (ops->ndo_fcoe_enable(netdev))
263 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
264 " specific feature for LLD.\n");
267 /* Do not support for bonding device */
268 if ((netdev->priv_flags & IFF_MASTER_ALB) ||
269 (netdev->priv_flags & IFF_SLAVE_INACTIVE) ||
270 (netdev->priv_flags & IFF_MASTER_8023AD)) {
271 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
275 /* look for SAN MAC address, if multiple SAN MACs exist, only
276 * use the first one for SPMA */
277 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
278 vlan_dev_real_dev(netdev) : netdev;
280 for_each_dev_addr(real_dev, ha) {
281 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
282 (is_valid_ether_addr(ha->addr))) {
283 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
290 /* setup Source Mac Address */
292 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
295 * Add FCoE MAC address as second unicast MAC address
296 * or enter promiscuous mode if not capable of listening
297 * for multiple unicast MACs.
299 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
300 dev_unicast_add(netdev, flogi_maddr);
302 dev_unicast_add(netdev, fip->ctl_src_addr);
303 dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
306 * setup the receive function from ethernet driver
307 * on the ethertype for the given device
309 fcoe->fcoe_packet_type.func = fcoe_rcv;
310 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
311 fcoe->fcoe_packet_type.dev = netdev;
312 dev_add_pack(&fcoe->fcoe_packet_type);
314 fcoe->fip_packet_type.func = fcoe_fip_recv;
315 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
316 fcoe->fip_packet_type.dev = netdev;
317 dev_add_pack(&fcoe->fip_packet_type);
323 * fcoe_interface_create() - Create a FCoE interface on a net device
324 * @netdev: The net device to create the FCoE interface on
326 * Returns: pointer to a struct fcoe_interface or NULL on error
328 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev)
330 struct fcoe_interface *fcoe;
333 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
335 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
340 kref_init(&fcoe->kref);
345 fcoe_ctlr_init(&fcoe->ctlr);
346 fcoe->ctlr.send = fcoe_fip_send;
347 fcoe->ctlr.update_mac = fcoe_update_src_mac;
348 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
350 err = fcoe_interface_setup(fcoe, netdev);
352 fcoe_ctlr_destroy(&fcoe->ctlr);
362 * fcoe_interface_cleanup() - Clean up a FCoE interface
363 * @fcoe: The FCoE interface to be cleaned up
365 * Caller must be holding the RTNL mutex
367 void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
369 struct net_device *netdev = fcoe->netdev;
370 struct fcoe_ctlr *fip = &fcoe->ctlr;
371 u8 flogi_maddr[ETH_ALEN];
372 const struct net_device_ops *ops;
375 * Don't listen for Ethernet packets anymore.
376 * synchronize_net() ensures that the packet handlers are not running
377 * on another CPU. dev_remove_pack() would do that, this calls the
378 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
380 __dev_remove_pack(&fcoe->fcoe_packet_type);
381 __dev_remove_pack(&fcoe->fip_packet_type);
384 /* Delete secondary MAC addresses */
385 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
386 dev_unicast_delete(netdev, flogi_maddr);
388 dev_unicast_delete(netdev, fip->ctl_src_addr);
389 dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
391 /* Tell the LLD we are done w/ FCoE */
392 ops = netdev->netdev_ops;
393 if (ops->ndo_fcoe_disable) {
394 if (ops->ndo_fcoe_disable(netdev))
395 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
396 " specific feature for LLD.\n");
401 * fcoe_interface_release() - fcoe_port kref release function
402 * @kref: Embedded reference count in an fcoe_interface struct
404 static void fcoe_interface_release(struct kref *kref)
406 struct fcoe_interface *fcoe;
407 struct net_device *netdev;
409 fcoe = container_of(kref, struct fcoe_interface, kref);
410 netdev = fcoe->netdev;
411 /* tear-down the FCoE controller */
412 fcoe_ctlr_destroy(&fcoe->ctlr);
418 * fcoe_interface_get() - Get a reference to a FCoE interface
419 * @fcoe: The FCoE interface to be held
421 static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
423 kref_get(&fcoe->kref);
427 * fcoe_interface_put() - Put a reference to a FCoE interface
428 * @fcoe: The FCoE interface to be released
430 static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
432 kref_put(&fcoe->kref, fcoe_interface_release);
436 * fcoe_fip_recv() - Handler for received FIP frames
437 * @skb: The receive skb
438 * @netdev: The associated net device
439 * @ptype: The packet_type structure which was used to register this handler
440 * @orig_dev: The original net_device the the skb was received on.
441 * (in case dev is a bond)
443 * Returns: 0 for success
445 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
446 struct packet_type *ptype,
447 struct net_device *orig_dev)
449 struct fcoe_interface *fcoe;
451 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
452 fcoe_ctlr_recv(&fcoe->ctlr, skb);
457 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
458 * @fip: The FCoE controller
459 * @skb: The FIP packet to be sent
461 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
463 skb->dev = fcoe_from_ctlr(fip)->netdev;
468 * fcoe_update_src_mac() - Update the Ethernet MAC filters
469 * @lport: The local port to update the source MAC on
470 * @addr: Unicast MAC address to add
472 * Remove any previously-set unicast MAC filter.
473 * Add secondary FCoE MAC address filter for our OUI.
475 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
477 struct fcoe_port *port = lport_priv(lport);
478 struct fcoe_interface *fcoe = port->fcoe;
481 if (!is_zero_ether_addr(port->data_src_addr))
482 dev_unicast_delete(fcoe->netdev, port->data_src_addr);
483 if (!is_zero_ether_addr(addr))
484 dev_unicast_add(fcoe->netdev, addr);
485 memcpy(port->data_src_addr, addr, ETH_ALEN);
490 * fcoe_get_src_mac() - return the Ethernet source address for an lport
491 * @lport: libfc lport
493 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
495 struct fcoe_port *port = lport_priv(lport);
497 return port->data_src_addr;
501 * fcoe_lport_config() - Set up a local port
502 * @lport: The local port to be setup
504 * Returns: 0 for success
506 static int fcoe_lport_config(struct fc_lport *lport)
510 lport->max_retry_count = 3;
511 lport->max_rport_retry_count = 3;
512 lport->e_d_tov = 2 * 1000; /* FC-FS default */
513 lport->r_a_tov = 2 * 2 * 1000;
514 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
515 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
516 lport->does_npiv = 1;
518 fc_lport_init_stats(lport);
520 /* lport fc_lport related configuration */
521 fc_lport_config(lport);
523 /* offload related configuration */
524 lport->crc_offload = 0;
525 lport->seq_offload = 0;
526 lport->lro_enabled = 0;
534 * fcoe_queue_timer() - The fcoe queue timer
535 * @lport: The local port
537 * Calls fcoe_check_wait_queue on timeout
539 static void fcoe_queue_timer(ulong lport)
541 fcoe_check_wait_queue((struct fc_lport *)lport, NULL);
545 * fcoe_netdev_config() - Set up net devive for SW FCoE
546 * @lport: The local port that is associated with the net device
547 * @netdev: The associated net device
549 * Must be called after fcoe_lport_config() as it will use local port mutex
551 * Returns: 0 for success
553 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
557 struct fcoe_interface *fcoe;
558 struct fcoe_port *port;
561 /* Setup lport private data to point to fcoe softc */
562 port = lport_priv(lport);
566 * Determine max frame size based on underlying device and optional
567 * user-configured limit. If the MFS is too low, fcoe_link_ok()
568 * will return 0, so do this first.
571 if (netdev->features & NETIF_F_FCOE_MTU) {
573 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
575 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
576 if (fc_set_mfs(lport, mfs))
579 /* offload features support */
580 if (netdev->features & NETIF_F_SG)
583 if (netdev->features & NETIF_F_FCOE_CRC) {
584 lport->crc_offload = 1;
585 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
587 if (netdev->features & NETIF_F_FSO) {
588 lport->seq_offload = 1;
589 lport->lso_max = netdev->gso_max_size;
590 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
593 if (netdev->fcoe_ddp_xid) {
594 lport->lro_enabled = 1;
595 lport->lro_xid = netdev->fcoe_ddp_xid;
596 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
599 skb_queue_head_init(&port->fcoe_pending_queue);
600 port->fcoe_pending_queue_active = 0;
601 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
605 * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN:
606 * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0.
607 * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID
609 if (netdev->priv_flags & IFF_802_1Q_VLAN)
610 vid = vlan_dev_vlan_id(netdev);
611 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
612 fc_set_wwnn(lport, wwnn);
613 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 2, vid);
614 fc_set_wwpn(lport, wwpn);
621 * fcoe_shost_config() - Set up the SCSI host associated with a local port
622 * @lport: The local port
623 * @shost: The SCSI host to associate with the local port
624 * @dev: The device associated with the SCSI host
626 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
628 * Returns: 0 for success
630 static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost,
635 /* lport scsi host config */
636 lport->host->max_lun = FCOE_MAX_LUN;
637 lport->host->max_id = FCOE_MAX_FCP_TARGET;
638 lport->host->max_channel = 0;
640 lport->host->transportt = fcoe_vport_transport_template;
642 lport->host->transportt = fcoe_transport_template;
644 /* add the new host to the SCSI-ml */
645 rc = scsi_add_host(lport->host, dev);
647 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
648 "error on scsi_add_host\n");
653 fc_host_max_npiv_vports(lport->host) = USHORT_MAX;
655 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
656 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
657 fcoe_netdev(lport)->name);
663 * fcoe_oem_match() - The match routine for the offloaded exchange manager
666 * This routine will be associated with an exchange manager (EM). When
667 * the libfc exchange handling code is looking for an EM to use it will
668 * call this routine and pass it the frame that it wishes to send. This
669 * routine will return True if the associated EM is to be used and False
670 * if the echange code should continue looking for an EM.
672 * The offload EM that this routine is associated with will handle any
673 * packets that are for SCSI read requests.
675 * Returns: True for read types I/O, otherwise returns false.
677 bool fcoe_oem_match(struct fc_frame *fp)
679 return fc_fcp_is_read(fr_fsp(fp)) &&
680 (fr_fsp(fp)->data_len > fcoe_ddp_min);
684 * fcoe_em_config() - Allocate and configure an exchange manager
685 * @lport: The local port that the new EM will be associated with
687 * Returns: 0 on success
689 static inline int fcoe_em_config(struct fc_lport *lport)
691 struct fcoe_port *port = lport_priv(lport);
692 struct fcoe_interface *fcoe = port->fcoe;
693 struct fcoe_interface *oldfcoe = NULL;
694 struct net_device *old_real_dev, *cur_real_dev;
695 u16 min_xid = FCOE_MIN_XID;
696 u16 max_xid = FCOE_MAX_XID;
699 * Check if need to allocate an em instance for
700 * offload exchange ids to be shared across all VN_PORTs/lport.
702 if (!lport->lro_enabled || !lport->lro_xid ||
703 (lport->lro_xid >= max_xid)) {
709 * Reuse existing offload em instance in case
710 * it is already allocated on real eth device
712 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
713 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
715 cur_real_dev = fcoe->netdev;
717 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
718 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
719 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
721 old_real_dev = oldfcoe->netdev;
723 if (cur_real_dev == old_real_dev) {
724 fcoe->oem = oldfcoe->oem;
730 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
731 printk(KERN_ERR "fcoe_em_config: failed to add "
732 "offload em:%p on interface:%s\n",
733 fcoe->oem, fcoe->netdev->name);
737 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
738 FCOE_MIN_XID, lport->lro_xid,
741 printk(KERN_ERR "fcoe_em_config: failed to allocate "
742 "em for offload exches on interface:%s\n",
749 * Exclude offload EM xid range from next EM xid range.
751 min_xid += lport->lro_xid + 1;
754 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
755 printk(KERN_ERR "fcoe_em_config: failed to "
756 "allocate em on interface %s\n", fcoe->netdev->name);
764 * fcoe_if_destroy() - Tear down a SW FCoE instance
765 * @lport: The local port to be destroyed
767 static void fcoe_if_destroy(struct fc_lport *lport)
769 struct fcoe_port *port = lport_priv(lport);
770 struct fcoe_interface *fcoe = port->fcoe;
771 struct net_device *netdev = fcoe->netdev;
773 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
775 /* Logout of the fabric */
776 fc_fabric_logoff(lport);
778 /* Cleanup the fc_lport */
779 fc_lport_destroy(lport);
780 fc_fcp_destroy(lport);
782 /* Stop the transmit retry timer */
783 del_timer_sync(&port->timer);
785 /* Free existing transmit skbs */
786 fcoe_clean_pending_queue(lport);
789 if (!is_zero_ether_addr(port->data_src_addr))
790 dev_unicast_delete(netdev, port->data_src_addr);
793 /* receives may not be stopped until after this */
794 fcoe_interface_put(fcoe);
796 /* Free queued packets for the per-CPU receive threads */
797 fcoe_percpu_clean(lport);
799 /* Detach from the scsi-ml */
800 fc_remove_host(lport->host);
801 scsi_remove_host(lport->host);
803 /* There are no more rports or I/O, free the EM */
804 fc_exch_mgr_free(lport);
806 /* Free memory used by statistical counters */
807 fc_lport_free_stats(lport);
809 /* Release the Scsi_Host */
810 scsi_host_put(lport->host);
814 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
815 * @lport: The local port to setup DDP for
816 * @xid: The exchange ID for this DDP transfer
817 * @sgl: The scatterlist describing this transfer
818 * @sgc: The number of sg items
820 * Returns: 0 if the DDP context was not configured
822 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
823 struct scatterlist *sgl, unsigned int sgc)
825 struct net_device *netdev = fcoe_netdev(lport);
827 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
828 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
836 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
837 * @lport: The local port to complete DDP on
838 * @xid: The exchange ID for this DDP transfer
840 * Returns: the length of data that have been completed by DDP
842 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
844 struct net_device *netdev = fcoe_netdev(lport);
846 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
847 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
852 * fcoe_if_create() - Create a FCoE instance on an interface
853 * @fcoe: The FCoE interface to create a local port on
854 * @parent: The device pointer to be the parent in sysfs for the SCSI host
855 * @npiv: Indicates if the port is a vport or not
857 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
859 * Returns: The allocated fc_lport or an error pointer
861 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
862 struct device *parent, int npiv)
864 struct net_device *netdev = fcoe->netdev;
865 struct fc_lport *lport = NULL;
866 struct fcoe_port *port;
867 struct Scsi_Host *shost;
870 * parent is only a vport if npiv is 1,
871 * but we'll only use vport in that case so go ahead and set it
873 struct fc_vport *vport = dev_to_vport(parent);
875 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
878 lport = libfc_host_alloc(&fcoe_shost_template,
879 sizeof(struct fcoe_port));
881 lport = libfc_vport_create(vport,
882 sizeof(struct fcoe_port));
885 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
890 port = lport_priv(lport);
893 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
895 /* configure a fc_lport including the exchange manager */
896 rc = fcoe_lport_config(lport);
898 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
904 FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n",
905 vport->node_name, vport->port_name);
906 fc_set_wwnn(lport, vport->node_name);
907 fc_set_wwpn(lport, vport->port_name);
910 /* configure lport network properties */
911 rc = fcoe_netdev_config(lport, netdev);
913 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
918 /* configure lport scsi host properties */
919 rc = fcoe_shost_config(lport, shost, parent);
921 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
926 /* Initialize the library */
927 rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ);
929 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
936 * fcoe_em_alloc() and fcoe_hostlist_add() both
937 * need to be atomic with respect to other changes to the
938 * hostlist since fcoe_em_alloc() looks for an existing EM
939 * instance on host list updated by fcoe_hostlist_add().
941 * This is currently handled through the fcoe_config_mutex
945 /* lport exch manager allocation */
946 rc = fcoe_em_config(lport);
948 FCOE_NETDEV_DBG(netdev, "Could not configure the EM "
949 "for the interface\n");
954 fcoe_interface_get(fcoe);
958 fc_exch_mgr_free(lport);
960 scsi_host_put(lport->host);
966 * fcoe_if_init() - Initialization routine for fcoe.ko
968 * Attaches the SW FCoE transport to the FC transport
970 * Returns: 0 on success
972 static int __init fcoe_if_init(void)
974 /* attach to scsi transport */
975 fcoe_transport_template = fc_attach_transport(&fcoe_transport_function);
976 fcoe_vport_transport_template =
977 fc_attach_transport(&fcoe_vport_transport_function);
979 if (!fcoe_transport_template) {
980 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
988 * fcoe_if_exit() - Tear down fcoe.ko
990 * Detaches the SW FCoE transport from the FC transport
992 * Returns: 0 on success
994 int __exit fcoe_if_exit(void)
996 fc_release_transport(fcoe_transport_template);
997 fc_release_transport(fcoe_vport_transport_template);
998 fcoe_transport_template = NULL;
999 fcoe_vport_transport_template = NULL;
1004 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1005 * @cpu: The CPU index of the CPU to create a receive thread for
1007 static void fcoe_percpu_thread_create(unsigned int cpu)
1009 struct fcoe_percpu_s *p;
1010 struct task_struct *thread;
1012 p = &per_cpu(fcoe_percpu, cpu);
1014 thread = kthread_create(fcoe_percpu_receive_thread,
1015 (void *)p, "fcoethread/%d", cpu);
1017 if (likely(!IS_ERR(thread))) {
1018 kthread_bind(thread, cpu);
1019 wake_up_process(thread);
1021 spin_lock_bh(&p->fcoe_rx_list.lock);
1023 spin_unlock_bh(&p->fcoe_rx_list.lock);
1028 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1029 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1031 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1032 * current CPU's Rx thread. If the thread being destroyed is bound to
1033 * the CPU processing this context the skbs will be freed.
1035 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1037 struct fcoe_percpu_s *p;
1038 struct task_struct *thread;
1039 struct page *crc_eof;
1040 struct sk_buff *skb;
1042 struct fcoe_percpu_s *p0;
1043 unsigned targ_cpu = smp_processor_id();
1044 #endif /* CONFIG_SMP */
1046 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1048 /* Prevent any new skbs from being queued for this CPU. */
1049 p = &per_cpu(fcoe_percpu, cpu);
1050 spin_lock_bh(&p->fcoe_rx_list.lock);
1053 crc_eof = p->crc_eof_page;
1054 p->crc_eof_page = NULL;
1055 p->crc_eof_offset = 0;
1056 spin_unlock_bh(&p->fcoe_rx_list.lock);
1060 * Don't bother moving the skb's if this context is running
1061 * on the same CPU that is having its thread destroyed. This
1062 * can easily happen when the module is removed.
1064 if (cpu != targ_cpu) {
1065 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1066 spin_lock_bh(&p0->fcoe_rx_list.lock);
1068 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1071 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1072 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1073 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1076 * The targeted CPU is not initialized and cannot accept
1077 * new skbs. Unlock the targeted CPU and drop the skbs
1078 * on the CPU that is going offline.
1080 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1082 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1086 * This scenario occurs when the module is being removed
1087 * and all threads are being destroyed. skbs will continue
1088 * to be shifted from the CPU thread that is being removed
1089 * to the CPU thread associated with the CPU that is processing
1090 * the module removal. Once there is only one CPU Rx thread it
1091 * will reach this case and we will drop all skbs and later
1094 spin_lock_bh(&p->fcoe_rx_list.lock);
1095 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1097 spin_unlock_bh(&p->fcoe_rx_list.lock);
1101 * This a non-SMP scenario where the singular Rx thread is
1102 * being removed. Free all skbs and stop the thread.
1104 spin_lock_bh(&p->fcoe_rx_list.lock);
1105 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1107 spin_unlock_bh(&p->fcoe_rx_list.lock);
1111 kthread_stop(thread);
1118 * fcoe_cpu_callback() - Handler for CPU hotplug events
1119 * @nfb: The callback data block
1120 * @action: The event triggering the callback
1121 * @hcpu: The index of the CPU that the event is for
1123 * This creates or destroys per-CPU data for fcoe
1125 * Returns NOTIFY_OK always.
1127 static int fcoe_cpu_callback(struct notifier_block *nfb,
1128 unsigned long action, void *hcpu)
1130 unsigned cpu = (unsigned long)hcpu;
1134 case CPU_ONLINE_FROZEN:
1135 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1136 fcoe_percpu_thread_create(cpu);
1139 case CPU_DEAD_FROZEN:
1140 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1141 fcoe_percpu_thread_destroy(cpu);
1150 * fcoe_rcv() - Receive packets from a net device
1151 * @skb: The received packet
1152 * @netdev: The net device that the packet was received on
1153 * @ptype: The packet type context
1154 * @olddev: The last device net device
1156 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1157 * FC frame and passes the frame to libfc.
1159 * Returns: 0 for success
1161 int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1162 struct packet_type *ptype, struct net_device *olddev)
1164 struct fc_lport *lport;
1165 struct fcoe_rcv_info *fr;
1166 struct fcoe_interface *fcoe;
1167 struct fc_frame_header *fh;
1168 struct fcoe_percpu_s *fps;
1171 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1172 lport = fcoe->ctlr.lp;
1173 if (unlikely(!lport)) {
1174 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1177 if (!lport->link_up)
1180 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1181 "data:%p tail:%p end:%p sum:%d dev:%s",
1182 skb->len, skb->data_len, skb->head, skb->data,
1183 skb_tail_pointer(skb), skb_end_pointer(skb),
1184 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1186 /* check for FCOE packet type */
1187 if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
1188 FCOE_NETDEV_DBG(netdev, "Wrong FC type frame");
1193 * Check for minimum frame length, and make sure required FCoE
1194 * and FC headers are pulled into the linear data area.
1196 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1197 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1200 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1201 fh = (struct fc_frame_header *) skb_transport_header(skb);
1203 fr = fcoe_dev_from_skb(skb);
1208 * In case the incoming frame's exchange is originated from
1209 * the initiator, then received frame's exchange id is ANDed
1210 * with fc_cpu_mask bits to get the same cpu on which exchange
1211 * was originated, otherwise just use the current cpu.
1213 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1214 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1216 cpu = smp_processor_id();
1218 fps = &per_cpu(fcoe_percpu, cpu);
1219 spin_lock_bh(&fps->fcoe_rx_list.lock);
1220 if (unlikely(!fps->thread)) {
1222 * The targeted CPU is not ready, let's target
1223 * the first CPU now. For non-SMP systems this
1224 * will check the same CPU twice.
1226 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1227 "ready for incoming skb- using first online "
1230 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1231 cpu = first_cpu(cpu_online_map);
1232 fps = &per_cpu(fcoe_percpu, cpu);
1233 spin_lock_bh(&fps->fcoe_rx_list.lock);
1235 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1241 * We now have a valid CPU that we're targeting for
1242 * this skb. We also have this receive thread locked,
1243 * so we're free to queue skbs into it's queue.
1246 /* If this is a SCSI-FCP frame, and this is already executing on the
1247 * correct CPU, and the queue for this CPU is empty, then go ahead
1248 * and process the frame directly in the softirq context.
1249 * This lets us process completions without context switching from the
1250 * NET_RX softirq, to our receive processing thread, and then back to
1251 * BLOCK softirq context.
1253 if (fh->fh_type == FC_TYPE_FCP &&
1254 cpu == smp_processor_id() &&
1255 skb_queue_empty(&fps->fcoe_rx_list)) {
1256 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1257 fcoe_recv_frame(skb);
1259 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1260 if (fps->fcoe_rx_list.qlen == 1)
1261 wake_up_process(fps->thread);
1262 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1267 fc_lport_get_stats(lport)->ErrorFrames++;
1275 * fcoe_start_io() - Start FCoE I/O
1276 * @skb: The packet to be transmitted
1278 * This routine is called from the net device to start transmitting
1281 * Returns: 0 for success
1283 static inline int fcoe_start_io(struct sk_buff *skb)
1285 struct sk_buff *nskb;
1288 nskb = skb_clone(skb, GFP_ATOMIC);
1289 rc = dev_queue_xmit(nskb);
1297 * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1298 * @skb: The packet to be transmitted
1299 * @tlen: The total length of the trailer
1301 * This routine allocates a page for frame trailers. The page is re-used if
1302 * there is enough room left on it for the current trailer. If there isn't
1303 * enough buffer left a new page is allocated for the trailer. Reference to
1304 * the page from this function as well as the skbs using the page fragments
1305 * ensure that the page is freed at the appropriate time.
1307 * Returns: 0 for success
1309 static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
1311 struct fcoe_percpu_s *fps;
1314 fps = &get_cpu_var(fcoe_percpu);
1315 page = fps->crc_eof_page;
1317 page = alloc_page(GFP_ATOMIC);
1319 put_cpu_var(fcoe_percpu);
1322 fps->crc_eof_page = page;
1323 fps->crc_eof_offset = 0;
1327 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
1328 fps->crc_eof_offset, tlen);
1330 skb->data_len += tlen;
1331 skb->truesize += tlen;
1332 fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
1334 if (fps->crc_eof_offset >= PAGE_SIZE) {
1335 fps->crc_eof_page = NULL;
1336 fps->crc_eof_offset = 0;
1339 put_cpu_var(fcoe_percpu);
1344 * fcoe_fc_crc() - Calculates the CRC for a given frame
1345 * @fp: The frame to be checksumed
1347 * This uses crc32() routine to calculate the CRC for a frame
1349 * Return: The 32 bit CRC value
1351 u32 fcoe_fc_crc(struct fc_frame *fp)
1353 struct sk_buff *skb = fp_skb(fp);
1354 struct skb_frag_struct *frag;
1355 unsigned char *data;
1356 unsigned long off, len, clen;
1360 crc = crc32(~0, skb->data, skb_headlen(skb));
1362 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1363 frag = &skb_shinfo(skb)->frags[i];
1364 off = frag->page_offset;
1367 clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
1368 data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
1369 KM_SKB_DATA_SOFTIRQ);
1370 crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
1371 kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
1380 * fcoe_xmit() - Transmit a FCoE frame
1381 * @lport: The local port that the frame is to be transmitted for
1382 * @fp: The frame to be transmitted
1384 * Return: 0 for success
1386 int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1391 struct fcoe_crc_eof *cp;
1392 struct sk_buff *skb;
1393 struct fcoe_dev_stats *stats;
1394 struct fc_frame_header *fh;
1395 unsigned int hlen; /* header length implies the version */
1396 unsigned int tlen; /* trailer length */
1397 unsigned int elen; /* eth header, may include vlan */
1398 struct fcoe_port *port = lport_priv(lport);
1399 struct fcoe_interface *fcoe = port->fcoe;
1401 struct fcoe_hdr *hp;
1403 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1405 fh = fc_frame_header_get(fp);
1407 wlen = skb->len / FCOE_WORD_TO_BYTE;
1409 if (!lport->link_up) {
1414 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1415 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1421 elen = sizeof(struct ethhdr);
1422 hlen = sizeof(struct fcoe_hdr);
1423 tlen = sizeof(struct fcoe_crc_eof);
1424 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1427 if (likely(lport->crc_offload)) {
1428 skb->ip_summed = CHECKSUM_PARTIAL;
1429 skb->csum_start = skb_headroom(skb);
1430 skb->csum_offset = skb->len;
1433 skb->ip_summed = CHECKSUM_NONE;
1434 crc = fcoe_fc_crc(fp);
1437 /* copy port crc and eof to the skb buff */
1438 if (skb_is_nonlinear(skb)) {
1440 if (fcoe_get_paged_crc_eof(skb, tlen)) {
1444 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1445 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1446 + frag->page_offset;
1448 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1451 memset(cp, 0, sizeof(*cp));
1453 cp->fcoe_crc32 = cpu_to_le32(~crc);
1455 if (skb_is_nonlinear(skb)) {
1456 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1460 /* adjust skb network/transport offsets to match mac/fcoe/port */
1461 skb_push(skb, elen + hlen);
1462 skb_reset_mac_header(skb);
1463 skb_reset_network_header(skb);
1464 skb->mac_len = elen;
1465 skb->protocol = htons(ETH_P_FCOE);
1466 skb->dev = fcoe->netdev;
1468 /* fill up mac and fcoe headers */
1470 eh->h_proto = htons(ETH_P_FCOE);
1471 if (fcoe->ctlr.map_dest)
1472 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
1474 /* insert GW address */
1475 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1477 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1478 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1480 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1482 hp = (struct fcoe_hdr *)(eh + 1);
1483 memset(hp, 0, sizeof(*hp));
1485 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1488 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1489 if (lport->seq_offload && fr_max_payload(fp)) {
1490 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1491 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1493 skb_shinfo(skb)->gso_type = 0;
1494 skb_shinfo(skb)->gso_size = 0;
1496 /* update tx stats: regardless if LLD fails */
1497 stats = fc_lport_get_stats(lport);
1499 stats->TxWords += wlen;
1501 /* send down to lld */
1503 if (port->fcoe_pending_queue.qlen)
1504 fcoe_check_wait_queue(lport, skb);
1505 else if (fcoe_start_io(skb))
1506 fcoe_check_wait_queue(lport, skb);
1512 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1513 * @skb: The completed skb (argument required by destructor)
1515 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1517 complete(&fcoe_flush_completion);
1521 * fcoe_recv_frame() - process a single received frame
1522 * @skb: frame to process
1524 static void fcoe_recv_frame(struct sk_buff *skb)
1527 struct fc_lport *lport;
1528 struct fcoe_rcv_info *fr;
1529 struct fcoe_dev_stats *stats;
1530 struct fc_frame_header *fh;
1531 struct fcoe_crc_eof crc_eof;
1532 struct fc_frame *fp;
1534 struct fcoe_port *port;
1535 struct fcoe_hdr *hp;
1537 fr = fcoe_dev_from_skb(skb);
1539 if (unlikely(!lport)) {
1540 if (skb->destructor != fcoe_percpu_flush_done)
1541 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1546 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1547 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1548 skb->len, skb->data_len,
1549 skb->head, skb->data, skb_tail_pointer(skb),
1550 skb_end_pointer(skb), skb->csum,
1551 skb->dev ? skb->dev->name : "<NULL>");
1554 * Save source MAC address before discarding header.
1556 port = lport_priv(lport);
1557 if (skb_is_nonlinear(skb))
1558 skb_linearize(skb); /* not ideal */
1559 mac = eth_hdr(skb)->h_source;
1562 * Frame length checks and setting up the header pointers
1563 * was done in fcoe_rcv already.
1565 hp = (struct fcoe_hdr *) skb_network_header(skb);
1566 fh = (struct fc_frame_header *) skb_transport_header(skb);
1568 stats = fc_lport_get_stats(lport);
1569 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1570 if (stats->ErrorFrames < 5)
1571 printk(KERN_WARNING "fcoe: FCoE version "
1572 "mismatch: The frame has "
1573 "version %x, but the "
1574 "initiator supports version "
1575 "%x\n", FC_FCOE_DECAPS_VER(hp),
1577 stats->ErrorFrames++;
1582 skb_pull(skb, sizeof(struct fcoe_hdr));
1583 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1586 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1588 fp = (struct fc_frame *)skb;
1591 fr_sof(fp) = hp->fcoe_sof;
1593 /* Copy out the CRC and EOF trailer for access */
1594 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
1598 fr_eof(fp) = crc_eof.fcoe_eof;
1599 fr_crc(fp) = crc_eof.fcoe_crc32;
1600 if (pskb_trim(skb, fr_len)) {
1606 * We only check CRC if no offload is available and if it is
1607 * it's solicited data, in which case, the FCP layer would
1608 * check it during the copy.
1610 if (lport->crc_offload &&
1611 skb->ip_summed == CHECKSUM_UNNECESSARY)
1612 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1614 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1616 fh = fc_frame_header_get(fp);
1617 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
1618 fh->fh_type == FC_TYPE_FCP) {
1619 fc_exch_recv(lport, fp);
1622 if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
1623 if (le32_to_cpu(fr_crc(fp)) !=
1624 ~crc32(~0, skb->data, fr_len)) {
1625 if (stats->InvalidCRCCount < 5)
1626 printk(KERN_WARNING "fcoe: dropping "
1627 "frame with CRC error\n");
1628 stats->InvalidCRCCount++;
1629 stats->ErrorFrames++;
1633 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1635 fc_exch_recv(lport, fp);
1639 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1640 * @arg: The per-CPU context
1642 * Return: 0 for success
1644 int fcoe_percpu_receive_thread(void *arg)
1646 struct fcoe_percpu_s *p = arg;
1647 struct sk_buff *skb;
1649 set_user_nice(current, -20);
1651 while (!kthread_should_stop()) {
1653 spin_lock_bh(&p->fcoe_rx_list.lock);
1654 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1655 set_current_state(TASK_INTERRUPTIBLE);
1656 spin_unlock_bh(&p->fcoe_rx_list.lock);
1658 set_current_state(TASK_RUNNING);
1659 if (kthread_should_stop())
1661 spin_lock_bh(&p->fcoe_rx_list.lock);
1663 spin_unlock_bh(&p->fcoe_rx_list.lock);
1664 fcoe_recv_frame(skb);
1670 * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
1671 * @lport: The local port whose backlog is to be cleared
1673 * This empties the wait_queue, dequeues the head of the wait_queue queue
1674 * and calls fcoe_start_io() for each packet. If all skb have been
1675 * transmitted it returns the qlen. If an error occurs it restores
1676 * wait_queue (to try again later) and returns -1.
1678 * The wait_queue is used when the skb transmit fails. The failed skb
1679 * will go in the wait_queue which will be emptied by the timer function or
1680 * by the next skb transmit.
1682 static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
1684 struct fcoe_port *port = lport_priv(lport);
1687 spin_lock_bh(&port->fcoe_pending_queue.lock);
1690 __skb_queue_tail(&port->fcoe_pending_queue, skb);
1692 if (port->fcoe_pending_queue_active)
1694 port->fcoe_pending_queue_active = 1;
1696 while (port->fcoe_pending_queue.qlen) {
1697 /* keep qlen > 0 until fcoe_start_io succeeds */
1698 port->fcoe_pending_queue.qlen++;
1699 skb = __skb_dequeue(&port->fcoe_pending_queue);
1701 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1702 rc = fcoe_start_io(skb);
1703 spin_lock_bh(&port->fcoe_pending_queue.lock);
1706 __skb_queue_head(&port->fcoe_pending_queue, skb);
1707 /* undo temporary increment above */
1708 port->fcoe_pending_queue.qlen--;
1711 /* undo temporary increment above */
1712 port->fcoe_pending_queue.qlen--;
1715 if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
1717 if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
1718 mod_timer(&port->timer, jiffies + 2);
1719 port->fcoe_pending_queue_active = 0;
1721 if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
1723 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1728 * fcoe_dev_setup() - Setup the link change notification interface
1730 static void fcoe_dev_setup(void)
1732 register_netdevice_notifier(&fcoe_notifier);
1736 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1738 static void fcoe_dev_cleanup(void)
1740 unregister_netdevice_notifier(&fcoe_notifier);
1744 * fcoe_device_notification() - Handler for net device events
1745 * @notifier: The context of the notification
1746 * @event: The type of event
1747 * @ptr: The net device that the event was on
1749 * This function is called by the Ethernet driver in case of link change event.
1751 * Returns: 0 for success
1753 static int fcoe_device_notification(struct notifier_block *notifier,
1754 ulong event, void *ptr)
1756 struct fc_lport *lport = NULL;
1757 struct net_device *netdev = ptr;
1758 struct fcoe_interface *fcoe;
1759 struct fcoe_port *port;
1760 struct fcoe_dev_stats *stats;
1761 u32 link_possible = 1;
1765 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1766 if (fcoe->netdev == netdev) {
1767 lport = fcoe->ctlr.lp;
1778 case NETDEV_GOING_DOWN:
1784 case NETDEV_CHANGEMTU:
1785 if (netdev->features & NETIF_F_FCOE_MTU)
1787 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1788 sizeof(struct fcoe_crc_eof));
1789 if (mfs >= FC_MIN_MAX_FRAME)
1790 fc_set_mfs(lport, mfs);
1792 case NETDEV_REGISTER:
1794 case NETDEV_UNREGISTER:
1795 list_del(&fcoe->list);
1796 port = lport_priv(fcoe->ctlr.lp);
1797 fcoe_interface_cleanup(fcoe);
1798 schedule_work(&port->destroy_work);
1802 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1803 "from netdev netlink\n", event);
1805 if (link_possible && !fcoe_link_ok(lport))
1806 fcoe_ctlr_link_up(&fcoe->ctlr);
1807 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1808 stats = fc_lport_get_stats(lport);
1809 stats->LinkFailureCount++;
1810 fcoe_clean_pending_queue(lport);
1817 * fcoe_if_to_netdev() - Parse a name buffer to get a net device
1818 * @buffer: The name of the net device
1820 * Returns: NULL or a ptr to net_device
1822 static struct net_device *fcoe_if_to_netdev(const char *buffer)
1825 char ifname[IFNAMSIZ + 2];
1828 strlcpy(ifname, buffer, IFNAMSIZ);
1829 cp = ifname + strlen(ifname);
1830 while (--cp >= ifname && *cp == '\n')
1832 return dev_get_by_name(&init_net, ifname);
1838 * fcoe_destroy() - Destroy a FCoE interface
1839 * @buffer: The name of the Ethernet interface to be destroyed
1840 * @kp: The associated kernel parameter
1842 * Called from sysfs.
1844 * Returns: 0 for success
1846 static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
1848 struct fcoe_interface *fcoe;
1849 struct net_device *netdev;
1852 mutex_lock(&fcoe_config_mutex);
1853 #ifdef CONFIG_FCOE_MODULE
1855 * Make sure the module has been initialized, and is not about to be
1856 * removed. Module paramter sysfs files are writable before the
1857 * module_init function is called and after module_exit.
1859 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1865 netdev = fcoe_if_to_netdev(buffer);
1872 fcoe = fcoe_hostlist_lookup_port(netdev);
1878 list_del(&fcoe->list);
1879 fcoe_interface_cleanup(fcoe);
1881 fcoe_if_destroy(fcoe->ctlr.lp);
1885 mutex_unlock(&fcoe_config_mutex);
1890 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1891 * @work: Handle to the FCoE port to be destroyed
1893 static void fcoe_destroy_work(struct work_struct *work)
1895 struct fcoe_port *port;
1897 port = container_of(work, struct fcoe_port, destroy_work);
1898 mutex_lock(&fcoe_config_mutex);
1899 fcoe_if_destroy(port->lport);
1900 mutex_unlock(&fcoe_config_mutex);
1904 * fcoe_create() - Create a fcoe interface
1905 * @buffer: The name of the Ethernet interface to create on
1906 * @kp: The associated kernel param
1908 * Called from sysfs.
1910 * Returns: 0 for success
1912 static int fcoe_create(const char *buffer, struct kernel_param *kp)
1915 struct fcoe_interface *fcoe;
1916 struct fc_lport *lport;
1917 struct net_device *netdev;
1919 mutex_lock(&fcoe_config_mutex);
1920 #ifdef CONFIG_FCOE_MODULE
1922 * Make sure the module has been initialized, and is not about to be
1923 * removed. Module paramter sysfs files are writable before the
1924 * module_init function is called and after module_exit.
1926 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1933 netdev = fcoe_if_to_netdev(buffer);
1939 /* look for existing lport */
1940 if (fcoe_hostlist_lookup(netdev)) {
1945 fcoe = fcoe_interface_create(netdev);
1951 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
1952 if (IS_ERR(lport)) {
1953 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
1956 fcoe_interface_cleanup(fcoe);
1960 /* Make this the "master" N_Port */
1961 fcoe->ctlr.lp = lport;
1963 /* add to lports list */
1964 fcoe_hostlist_add(lport);
1966 /* start FIP Discovery and FLOGI */
1967 lport->boot_time = jiffies;
1968 fc_fabric_login(lport);
1969 if (!fcoe_link_ok(lport))
1970 fcoe_ctlr_link_up(&fcoe->ctlr);
1975 * Release from init in fcoe_interface_create(), on success lport
1976 * should be holding a reference taken in fcoe_if_create().
1978 fcoe_interface_put(fcoe);
1983 mutex_unlock(&fcoe_config_mutex);
1988 * fcoe_link_ok() - Check if the link is OK for a local port
1989 * @lport: The local port to check link on
1991 * Any permanently-disqualifying conditions have been previously checked.
1992 * This also updates the speed setting, which may change with link for 100/1000.
1994 * This function should probably be checking for PAUSE support at some point
1995 * in the future. Currently Per-priority-pause is not determinable using
1996 * ethtool, so we shouldn't be restrictive until that problem is resolved.
1998 * Returns: 0 if link is OK for use by FCoE.
2001 int fcoe_link_ok(struct fc_lport *lport)
2003 struct fcoe_port *port = lport_priv(lport);
2004 struct net_device *netdev = port->fcoe->netdev;
2005 struct ethtool_cmd ecmd = { ETHTOOL_GSET };
2007 if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) &&
2008 (!dev_ethtool_get_settings(netdev, &ecmd))) {
2009 lport->link_supported_speeds &=
2010 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
2011 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
2012 SUPPORTED_1000baseT_Full))
2013 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
2014 if (ecmd.supported & SUPPORTED_10000baseT_Full)
2015 lport->link_supported_speeds |=
2016 FC_PORTSPEED_10GBIT;
2017 if (ecmd.speed == SPEED_1000)
2018 lport->link_speed = FC_PORTSPEED_1GBIT;
2019 if (ecmd.speed == SPEED_10000)
2020 lport->link_speed = FC_PORTSPEED_10GBIT;
2028 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2029 * @lport: The local port whose skbs are to be cleared
2031 * Must be called with fcoe_create_mutex held to single-thread completion.
2033 * This flushes the pending skbs by adding a new skb to each queue and
2034 * waiting until they are all freed. This assures us that not only are
2035 * there no packets that will be handled by the lport, but also that any
2036 * threads already handling packet have returned.
2038 void fcoe_percpu_clean(struct fc_lport *lport)
2040 struct fcoe_percpu_s *pp;
2041 struct fcoe_rcv_info *fr;
2042 struct sk_buff_head *list;
2043 struct sk_buff *skb, *next;
2044 struct sk_buff *head;
2047 for_each_possible_cpu(cpu) {
2048 pp = &per_cpu(fcoe_percpu, cpu);
2049 spin_lock_bh(&pp->fcoe_rx_list.lock);
2050 list = &pp->fcoe_rx_list;
2052 for (skb = head; skb != (struct sk_buff *)list;
2055 fr = fcoe_dev_from_skb(skb);
2056 if (fr->fr_dev == lport) {
2057 __skb_unlink(skb, list);
2062 if (!pp->thread || !cpu_online(cpu)) {
2063 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2067 skb = dev_alloc_skb(0);
2069 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2072 skb->destructor = fcoe_percpu_flush_done;
2074 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2075 if (pp->fcoe_rx_list.qlen == 1)
2076 wake_up_process(pp->thread);
2077 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2079 wait_for_completion(&fcoe_flush_completion);
2084 * fcoe_clean_pending_queue() - Dequeue a skb and free it
2085 * @lport: The local port to dequeue a skb on
2087 void fcoe_clean_pending_queue(struct fc_lport *lport)
2089 struct fcoe_port *port = lport_priv(lport);
2090 struct sk_buff *skb;
2092 spin_lock_bh(&port->fcoe_pending_queue.lock);
2093 while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
2094 spin_unlock_bh(&port->fcoe_pending_queue.lock);
2096 spin_lock_bh(&port->fcoe_pending_queue.lock);
2098 spin_unlock_bh(&port->fcoe_pending_queue.lock);
2102 * fcoe_reset() - Reset a local port
2103 * @shost: The SCSI host associated with the local port to be reset
2105 * Returns: Always 0 (return value required by FC transport template)
2107 int fcoe_reset(struct Scsi_Host *shost)
2109 struct fc_lport *lport = shost_priv(shost);
2110 fc_lport_reset(lport);
2115 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2116 * @netdev: The net device used as a key
2118 * Locking: Must be called with the RNL mutex held.
2120 * Returns: NULL or the FCoE interface
2122 static struct fcoe_interface *
2123 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2125 struct fcoe_interface *fcoe;
2127 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2128 if (fcoe->netdev == netdev)
2135 * fcoe_hostlist_lookup() - Find the local port associated with a
2137 * @netdev: The netdevice used as a key
2139 * Locking: Must be called with the RTNL mutex held
2141 * Returns: NULL or the local port
2143 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2145 struct fcoe_interface *fcoe;
2147 fcoe = fcoe_hostlist_lookup_port(netdev);
2148 return (fcoe) ? fcoe->ctlr.lp : NULL;
2152 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2153 * port to the hostlist
2154 * @lport: The local port that identifies the FCoE interface to be added
2156 * Locking: must be called with the RTNL mutex held
2158 * Returns: 0 for success
2160 static int fcoe_hostlist_add(const struct fc_lport *lport)
2162 struct fcoe_interface *fcoe;
2163 struct fcoe_port *port;
2165 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2167 port = lport_priv(lport);
2169 list_add_tail(&fcoe->list, &fcoe_hostlist);
2175 * fcoe_init() - Initialize fcoe.ko
2177 * Returns: 0 on success, or a negative value on failure
2179 static int __init fcoe_init(void)
2181 struct fcoe_percpu_s *p;
2185 mutex_lock(&fcoe_config_mutex);
2187 for_each_possible_cpu(cpu) {
2188 p = &per_cpu(fcoe_percpu, cpu);
2189 skb_queue_head_init(&p->fcoe_rx_list);
2192 for_each_online_cpu(cpu)
2193 fcoe_percpu_thread_create(cpu);
2195 /* Initialize per CPU interrupt thread */
2196 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2200 /* Setup link change notification */
2203 rc = fcoe_if_init();
2207 mutex_unlock(&fcoe_config_mutex);
2211 for_each_online_cpu(cpu) {
2212 fcoe_percpu_thread_destroy(cpu);
2214 mutex_unlock(&fcoe_config_mutex);
2217 module_init(fcoe_init);
2220 * fcoe_exit() - Clean up fcoe.ko
2222 * Returns: 0 on success or a negative value on failure
2224 static void __exit fcoe_exit(void)
2226 struct fcoe_interface *fcoe, *tmp;
2227 struct fcoe_port *port;
2230 mutex_lock(&fcoe_config_mutex);
2234 /* releases the associated fcoe hosts */
2236 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2237 list_del(&fcoe->list);
2238 port = lport_priv(fcoe->ctlr.lp);
2239 fcoe_interface_cleanup(fcoe);
2240 schedule_work(&port->destroy_work);
2244 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2246 for_each_online_cpu(cpu)
2247 fcoe_percpu_thread_destroy(cpu);
2249 mutex_unlock(&fcoe_config_mutex);
2251 /* flush any asyncronous interface destroys,
2252 * this should happen after the netdev notifier is unregistered */
2253 flush_scheduled_work();
2254 /* That will flush out all the N_Ports on the hostlist, but now we
2255 * may have NPIV VN_Ports scheduled for destruction */
2256 flush_scheduled_work();
2258 /* detach from scsi transport
2259 * must happen after all destroys are done, therefor after the flush */
2262 module_exit(fcoe_exit);
2265 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2266 * @seq: active sequence in the FLOGI or FDISC exchange
2267 * @fp: response frame, or error encoded in a pointer (timeout)
2268 * @arg: pointer the the fcoe_ctlr structure
2270 * This handles MAC address managment for FCoE, then passes control on to
2271 * the libfc FLOGI response handler.
2273 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2275 struct fcoe_ctlr *fip = arg;
2276 struct fc_exch *exch = fc_seq_exch(seq);
2277 struct fc_lport *lport = exch->lp;
2283 mac = fr_cb(fp)->granted_mac;
2284 if (is_zero_ether_addr(mac)) {
2286 if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
2291 fcoe_update_src_mac(lport, mac);
2293 fc_lport_flogi_resp(seq, fp, lport);
2297 * fcoe_logo_resp() - FCoE specific LOGO response handler
2298 * @seq: active sequence in the LOGO exchange
2299 * @fp: response frame, or error encoded in a pointer (timeout)
2300 * @arg: pointer the the fcoe_ctlr structure
2302 * This handles MAC address managment for FCoE, then passes control on to
2303 * the libfc LOGO response handler.
2305 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2307 struct fc_lport *lport = arg;
2308 static u8 zero_mac[ETH_ALEN] = { 0 };
2311 fcoe_update_src_mac(lport, zero_mac);
2312 fc_lport_logo_resp(seq, fp, lport);
2316 * fcoe_elsct_send - FCoE specific ELS handler
2318 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2319 * using FCoE specific response handlers and passing the FIP controller as
2320 * the argument (the lport is still available from the exchange).
2322 * Most of the work here is just handed off to the libfc routine.
2324 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2325 struct fc_frame *fp, unsigned int op,
2326 void (*resp)(struct fc_seq *,
2329 void *arg, u32 timeout)
2331 struct fcoe_port *port = lport_priv(lport);
2332 struct fcoe_interface *fcoe = port->fcoe;
2333 struct fcoe_ctlr *fip = &fcoe->ctlr;
2334 struct fc_frame_header *fh = fc_frame_header_get(fp);
2339 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2342 /* only hook onto fabric logouts, not port logouts */
2343 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2345 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2348 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2352 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2353 * @vport: fc_vport object to create a new fc_host for
2354 * @disabled: start the new fc_host in a disabled state by default?
2356 * Returns: 0 for success
2358 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2360 struct Scsi_Host *shost = vport_to_shost(vport);
2361 struct fc_lport *n_port = shost_priv(shost);
2362 struct fcoe_port *port = lport_priv(n_port);
2363 struct fcoe_interface *fcoe = port->fcoe;
2364 struct net_device *netdev = fcoe->netdev;
2365 struct fc_lport *vn_port;
2367 mutex_lock(&fcoe_config_mutex);
2368 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2369 mutex_unlock(&fcoe_config_mutex);
2371 if (IS_ERR(vn_port)) {
2372 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2378 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2380 vn_port->boot_time = jiffies;
2381 fc_fabric_login(vn_port);
2382 fc_vport_setlink(vn_port);
2388 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2389 * @vport: fc_vport object that is being destroyed
2391 * Returns: 0 for success
2393 static int fcoe_vport_destroy(struct fc_vport *vport)
2395 struct Scsi_Host *shost = vport_to_shost(vport);
2396 struct fc_lport *n_port = shost_priv(shost);
2397 struct fc_lport *vn_port = vport->dd_data;
2398 struct fcoe_port *port = lport_priv(vn_port);
2400 mutex_lock(&n_port->lp_mutex);
2401 list_del(&vn_port->list);
2402 mutex_unlock(&n_port->lp_mutex);
2403 schedule_work(&port->destroy_work);
2408 * fcoe_vport_disable() - change vport state
2409 * @vport: vport to bring online/offline
2410 * @disable: should the vport be disabled?
2412 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2414 struct fc_lport *lport = vport->dd_data;
2417 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2418 fc_fabric_logoff(lport);
2420 lport->boot_time = jiffies;
2421 fc_fabric_login(lport);
2422 fc_vport_setlink(lport);
2429 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2430 * @vport: fc_vport with a new symbolic name string
2432 * After generating a new symbolic name string, a new RSPN_ID request is
2433 * sent to the name server. There is no response handler, so if it fails
2434 * for some reason it will not be retried.
2436 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2438 struct fc_lport *lport = vport->dd_data;
2439 struct fc_frame *fp;
2442 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2443 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2444 fcoe_netdev(lport)->name, vport->symbolic_name);
2446 if (lport->state != LPORT_ST_READY)
2449 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2450 fp = fc_frame_alloc(lport,
2451 sizeof(struct fc_ct_hdr) +
2452 sizeof(struct fc_ns_rspn) + len);
2455 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2456 NULL, NULL, 3 * lport->r_a_tov);