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 static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
116 module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
117 __MODULE_PARM_TYPE(create, "string");
118 MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in.");
119 module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
120 __MODULE_PARM_TYPE(destroy, "string");
121 MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe");
123 /* notification function for packets from net device */
124 static struct notifier_block fcoe_notifier = {
125 .notifier_call = fcoe_device_notification,
128 /* notification function for CPU hotplug events */
129 static struct notifier_block fcoe_cpu_notifier = {
130 .notifier_call = fcoe_cpu_callback,
133 static struct scsi_transport_template *fcoe_transport_template;
134 static struct scsi_transport_template *fcoe_vport_transport_template;
136 static int fcoe_vport_destroy(struct fc_vport *);
137 static int fcoe_vport_create(struct fc_vport *, bool disabled);
138 static int fcoe_vport_disable(struct fc_vport *, bool disable);
139 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
141 static struct libfc_function_template fcoe_libfc_fcn_templ = {
142 .frame_send = fcoe_xmit,
143 .ddp_setup = fcoe_ddp_setup,
144 .ddp_done = fcoe_ddp_done,
145 .elsct_send = fcoe_elsct_send,
146 .get_lesb = fcoe_get_lesb,
149 struct fc_function_template fcoe_transport_function = {
150 .show_host_node_name = 1,
151 .show_host_port_name = 1,
152 .show_host_supported_classes = 1,
153 .show_host_supported_fc4s = 1,
154 .show_host_active_fc4s = 1,
155 .show_host_maxframe_size = 1,
157 .show_host_port_id = 1,
158 .show_host_supported_speeds = 1,
159 .get_host_speed = fc_get_host_speed,
160 .show_host_speed = 1,
161 .show_host_port_type = 1,
162 .get_host_port_state = fc_get_host_port_state,
163 .show_host_port_state = 1,
164 .show_host_symbolic_name = 1,
166 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
167 .show_rport_maxframe_size = 1,
168 .show_rport_supported_classes = 1,
170 .show_host_fabric_name = 1,
171 .show_starget_node_name = 1,
172 .show_starget_port_name = 1,
173 .show_starget_port_id = 1,
174 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
175 .show_rport_dev_loss_tmo = 1,
176 .get_fc_host_stats = fc_get_host_stats,
177 .issue_fc_host_lip = fcoe_reset,
179 .terminate_rport_io = fc_rport_terminate_io,
181 .vport_create = fcoe_vport_create,
182 .vport_delete = fcoe_vport_destroy,
183 .vport_disable = fcoe_vport_disable,
184 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
186 .bsg_request = fc_lport_bsg_request,
189 struct fc_function_template fcoe_vport_transport_function = {
190 .show_host_node_name = 1,
191 .show_host_port_name = 1,
192 .show_host_supported_classes = 1,
193 .show_host_supported_fc4s = 1,
194 .show_host_active_fc4s = 1,
195 .show_host_maxframe_size = 1,
197 .show_host_port_id = 1,
198 .show_host_supported_speeds = 1,
199 .get_host_speed = fc_get_host_speed,
200 .show_host_speed = 1,
201 .show_host_port_type = 1,
202 .get_host_port_state = fc_get_host_port_state,
203 .show_host_port_state = 1,
204 .show_host_symbolic_name = 1,
206 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
207 .show_rport_maxframe_size = 1,
208 .show_rport_supported_classes = 1,
210 .show_host_fabric_name = 1,
211 .show_starget_node_name = 1,
212 .show_starget_port_name = 1,
213 .show_starget_port_id = 1,
214 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
215 .show_rport_dev_loss_tmo = 1,
216 .get_fc_host_stats = fc_get_host_stats,
217 .issue_fc_host_lip = fcoe_reset,
219 .terminate_rport_io = fc_rport_terminate_io,
221 .bsg_request = fc_lport_bsg_request,
224 static struct scsi_host_template fcoe_shost_template = {
225 .module = THIS_MODULE,
226 .name = "FCoE Driver",
227 .proc_name = FCOE_NAME,
228 .queuecommand = fc_queuecommand,
229 .eh_abort_handler = fc_eh_abort,
230 .eh_device_reset_handler = fc_eh_device_reset,
231 .eh_host_reset_handler = fc_eh_host_reset,
232 .slave_alloc = fc_slave_alloc,
233 .change_queue_depth = fc_change_queue_depth,
234 .change_queue_type = fc_change_queue_type,
237 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
238 .use_clustering = ENABLE_CLUSTERING,
239 .sg_tablesize = SG_ALL,
240 .max_sectors = 0xffff,
244 * fcoe_interface_setup() - Setup a FCoE interface
245 * @fcoe: The new FCoE interface
246 * @netdev: The net device that the fcoe interface is on
248 * Returns : 0 for success
249 * Locking: must be called with the RTNL mutex held
251 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
252 struct net_device *netdev)
254 struct fcoe_ctlr *fip = &fcoe->ctlr;
255 struct netdev_hw_addr *ha;
256 struct net_device *real_dev;
257 u8 flogi_maddr[ETH_ALEN];
258 const struct net_device_ops *ops;
260 fcoe->netdev = netdev;
262 /* Let LLD initialize for FCoE */
263 ops = netdev->netdev_ops;
264 if (ops->ndo_fcoe_enable) {
265 if (ops->ndo_fcoe_enable(netdev))
266 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
267 " specific feature for LLD.\n");
270 /* Do not support for bonding device */
271 if ((netdev->priv_flags & IFF_MASTER_ALB) ||
272 (netdev->priv_flags & IFF_SLAVE_INACTIVE) ||
273 (netdev->priv_flags & IFF_MASTER_8023AD)) {
274 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
278 /* look for SAN MAC address, if multiple SAN MACs exist, only
279 * use the first one for SPMA */
280 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
281 vlan_dev_real_dev(netdev) : netdev;
283 for_each_dev_addr(real_dev, ha) {
284 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
285 (is_valid_ether_addr(ha->addr))) {
286 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
293 /* setup Source Mac Address */
295 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
298 * Add FCoE MAC address as second unicast MAC address
299 * or enter promiscuous mode if not capable of listening
300 * for multiple unicast MACs.
302 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
303 dev_unicast_add(netdev, flogi_maddr);
305 dev_unicast_add(netdev, fip->ctl_src_addr);
306 dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
309 * setup the receive function from ethernet driver
310 * on the ethertype for the given device
312 fcoe->fcoe_packet_type.func = fcoe_rcv;
313 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
314 fcoe->fcoe_packet_type.dev = netdev;
315 dev_add_pack(&fcoe->fcoe_packet_type);
317 fcoe->fip_packet_type.func = fcoe_fip_recv;
318 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
319 fcoe->fip_packet_type.dev = netdev;
320 dev_add_pack(&fcoe->fip_packet_type);
326 * fcoe_interface_create() - Create a FCoE interface on a net device
327 * @netdev: The net device to create the FCoE interface on
329 * Returns: pointer to a struct fcoe_interface or NULL on error
331 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev)
333 struct fcoe_interface *fcoe;
336 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
338 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
343 kref_init(&fcoe->kref);
348 fcoe_ctlr_init(&fcoe->ctlr);
349 fcoe->ctlr.send = fcoe_fip_send;
350 fcoe->ctlr.update_mac = fcoe_update_src_mac;
351 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
353 err = fcoe_interface_setup(fcoe, netdev);
355 fcoe_ctlr_destroy(&fcoe->ctlr);
365 * fcoe_interface_cleanup() - Clean up a FCoE interface
366 * @fcoe: The FCoE interface to be cleaned up
368 * Caller must be holding the RTNL mutex
370 void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
372 struct net_device *netdev = fcoe->netdev;
373 struct fcoe_ctlr *fip = &fcoe->ctlr;
374 u8 flogi_maddr[ETH_ALEN];
375 const struct net_device_ops *ops;
378 * Don't listen for Ethernet packets anymore.
379 * synchronize_net() ensures that the packet handlers are not running
380 * on another CPU. dev_remove_pack() would do that, this calls the
381 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
383 __dev_remove_pack(&fcoe->fcoe_packet_type);
384 __dev_remove_pack(&fcoe->fip_packet_type);
387 /* Delete secondary MAC addresses */
388 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
389 dev_unicast_delete(netdev, flogi_maddr);
391 dev_unicast_delete(netdev, fip->ctl_src_addr);
392 dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
394 /* Tell the LLD we are done w/ FCoE */
395 ops = netdev->netdev_ops;
396 if (ops->ndo_fcoe_disable) {
397 if (ops->ndo_fcoe_disable(netdev))
398 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
399 " specific feature for LLD.\n");
404 * fcoe_interface_release() - fcoe_port kref release function
405 * @kref: Embedded reference count in an fcoe_interface struct
407 static void fcoe_interface_release(struct kref *kref)
409 struct fcoe_interface *fcoe;
410 struct net_device *netdev;
412 fcoe = container_of(kref, struct fcoe_interface, kref);
413 netdev = fcoe->netdev;
414 /* tear-down the FCoE controller */
415 fcoe_ctlr_destroy(&fcoe->ctlr);
421 * fcoe_interface_get() - Get a reference to a FCoE interface
422 * @fcoe: The FCoE interface to be held
424 static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
426 kref_get(&fcoe->kref);
430 * fcoe_interface_put() - Put a reference to a FCoE interface
431 * @fcoe: The FCoE interface to be released
433 static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
435 kref_put(&fcoe->kref, fcoe_interface_release);
439 * fcoe_fip_recv() - Handler for received FIP frames
440 * @skb: The receive skb
441 * @netdev: The associated net device
442 * @ptype: The packet_type structure which was used to register this handler
443 * @orig_dev: The original net_device the the skb was received on.
444 * (in case dev is a bond)
446 * Returns: 0 for success
448 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
449 struct packet_type *ptype,
450 struct net_device *orig_dev)
452 struct fcoe_interface *fcoe;
454 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
455 fcoe_ctlr_recv(&fcoe->ctlr, skb);
460 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
461 * @fip: The FCoE controller
462 * @skb: The FIP packet to be sent
464 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
466 skb->dev = fcoe_from_ctlr(fip)->netdev;
471 * fcoe_update_src_mac() - Update the Ethernet MAC filters
472 * @lport: The local port to update the source MAC on
473 * @addr: Unicast MAC address to add
475 * Remove any previously-set unicast MAC filter.
476 * Add secondary FCoE MAC address filter for our OUI.
478 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
480 struct fcoe_port *port = lport_priv(lport);
481 struct fcoe_interface *fcoe = port->fcoe;
484 if (!is_zero_ether_addr(port->data_src_addr))
485 dev_unicast_delete(fcoe->netdev, port->data_src_addr);
486 if (!is_zero_ether_addr(addr))
487 dev_unicast_add(fcoe->netdev, addr);
488 memcpy(port->data_src_addr, addr, ETH_ALEN);
493 * fcoe_get_src_mac() - return the Ethernet source address for an lport
494 * @lport: libfc lport
496 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
498 struct fcoe_port *port = lport_priv(lport);
500 return port->data_src_addr;
504 * fcoe_lport_config() - Set up a local port
505 * @lport: The local port to be setup
507 * Returns: 0 for success
509 static int fcoe_lport_config(struct fc_lport *lport)
513 lport->max_retry_count = 3;
514 lport->max_rport_retry_count = 3;
515 lport->e_d_tov = 2 * 1000; /* FC-FS default */
516 lport->r_a_tov = 2 * 2 * 1000;
517 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
518 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
519 lport->does_npiv = 1;
521 fc_lport_init_stats(lport);
523 /* lport fc_lport related configuration */
524 fc_lport_config(lport);
526 /* offload related configuration */
527 lport->crc_offload = 0;
528 lport->seq_offload = 0;
529 lport->lro_enabled = 0;
537 * fcoe_queue_timer() - The fcoe queue timer
538 * @lport: The local port
540 * Calls fcoe_check_wait_queue on timeout
542 static void fcoe_queue_timer(ulong lport)
544 fcoe_check_wait_queue((struct fc_lport *)lport, NULL);
548 * fcoe_netdev_config() - Set up net devive for SW FCoE
549 * @lport: The local port that is associated with the net device
550 * @netdev: The associated net device
552 * Must be called after fcoe_lport_config() as it will use local port mutex
554 * Returns: 0 for success
556 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
560 struct fcoe_interface *fcoe;
561 struct fcoe_port *port;
564 /* Setup lport private data to point to fcoe softc */
565 port = lport_priv(lport);
569 * Determine max frame size based on underlying device and optional
570 * user-configured limit. If the MFS is too low, fcoe_link_ok()
571 * will return 0, so do this first.
574 if (netdev->features & NETIF_F_FCOE_MTU) {
576 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
578 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
579 if (fc_set_mfs(lport, mfs))
582 /* offload features support */
583 if (netdev->features & NETIF_F_SG)
586 if (netdev->features & NETIF_F_FCOE_CRC) {
587 lport->crc_offload = 1;
588 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
590 if (netdev->features & NETIF_F_FSO) {
591 lport->seq_offload = 1;
592 lport->lso_max = netdev->gso_max_size;
593 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
596 if (netdev->fcoe_ddp_xid) {
597 lport->lro_enabled = 1;
598 lport->lro_xid = netdev->fcoe_ddp_xid;
599 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
602 skb_queue_head_init(&port->fcoe_pending_queue);
603 port->fcoe_pending_queue_active = 0;
604 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
608 * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN:
609 * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0.
610 * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID
612 if (netdev->priv_flags & IFF_802_1Q_VLAN)
613 vid = vlan_dev_vlan_id(netdev);
614 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
615 fc_set_wwnn(lport, wwnn);
616 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 2, vid);
617 fc_set_wwpn(lport, wwpn);
624 * fcoe_shost_config() - Set up the SCSI host associated with a local port
625 * @lport: The local port
626 * @shost: The SCSI host to associate with the local port
627 * @dev: The device associated with the SCSI host
629 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
631 * Returns: 0 for success
633 static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost,
638 /* lport scsi host config */
639 lport->host->max_lun = FCOE_MAX_LUN;
640 lport->host->max_id = FCOE_MAX_FCP_TARGET;
641 lport->host->max_channel = 0;
643 lport->host->transportt = fcoe_vport_transport_template;
645 lport->host->transportt = fcoe_transport_template;
647 /* add the new host to the SCSI-ml */
648 rc = scsi_add_host(lport->host, dev);
650 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
651 "error on scsi_add_host\n");
656 fc_host_max_npiv_vports(lport->host) = USHORT_MAX;
658 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
659 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
660 fcoe_netdev(lport)->name);
666 * fcoe_oem_match() - The match routine for the offloaded exchange manager
669 * This routine will be associated with an exchange manager (EM). When
670 * the libfc exchange handling code is looking for an EM to use it will
671 * call this routine and pass it the frame that it wishes to send. This
672 * routine will return True if the associated EM is to be used and False
673 * if the echange code should continue looking for an EM.
675 * The offload EM that this routine is associated with will handle any
676 * packets that are for SCSI read requests.
678 * Returns: True for read types I/O, otherwise returns false.
680 bool fcoe_oem_match(struct fc_frame *fp)
682 return fc_fcp_is_read(fr_fsp(fp)) &&
683 (fr_fsp(fp)->data_len > fcoe_ddp_min);
687 * fcoe_em_config() - Allocate and configure an exchange manager
688 * @lport: The local port that the new EM will be associated with
690 * Returns: 0 on success
692 static inline int fcoe_em_config(struct fc_lport *lport)
694 struct fcoe_port *port = lport_priv(lport);
695 struct fcoe_interface *fcoe = port->fcoe;
696 struct fcoe_interface *oldfcoe = NULL;
697 struct net_device *old_real_dev, *cur_real_dev;
698 u16 min_xid = FCOE_MIN_XID;
699 u16 max_xid = FCOE_MAX_XID;
702 * Check if need to allocate an em instance for
703 * offload exchange ids to be shared across all VN_PORTs/lport.
705 if (!lport->lro_enabled || !lport->lro_xid ||
706 (lport->lro_xid >= max_xid)) {
712 * Reuse existing offload em instance in case
713 * it is already allocated on real eth device
715 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
716 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
718 cur_real_dev = fcoe->netdev;
720 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
721 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
722 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
724 old_real_dev = oldfcoe->netdev;
726 if (cur_real_dev == old_real_dev) {
727 fcoe->oem = oldfcoe->oem;
733 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
734 printk(KERN_ERR "fcoe_em_config: failed to add "
735 "offload em:%p on interface:%s\n",
736 fcoe->oem, fcoe->netdev->name);
740 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
741 FCOE_MIN_XID, lport->lro_xid,
744 printk(KERN_ERR "fcoe_em_config: failed to allocate "
745 "em for offload exches on interface:%s\n",
752 * Exclude offload EM xid range from next EM xid range.
754 min_xid += lport->lro_xid + 1;
757 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
758 printk(KERN_ERR "fcoe_em_config: failed to "
759 "allocate em on interface %s\n", fcoe->netdev->name);
767 * fcoe_if_destroy() - Tear down a SW FCoE instance
768 * @lport: The local port to be destroyed
770 static void fcoe_if_destroy(struct fc_lport *lport)
772 struct fcoe_port *port = lport_priv(lport);
773 struct fcoe_interface *fcoe = port->fcoe;
774 struct net_device *netdev = fcoe->netdev;
776 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
778 /* Logout of the fabric */
779 fc_fabric_logoff(lport);
781 /* Cleanup the fc_lport */
782 fc_lport_destroy(lport);
783 fc_fcp_destroy(lport);
785 /* Stop the transmit retry timer */
786 del_timer_sync(&port->timer);
788 /* Free existing transmit skbs */
789 fcoe_clean_pending_queue(lport);
792 if (!is_zero_ether_addr(port->data_src_addr))
793 dev_unicast_delete(netdev, port->data_src_addr);
796 /* receives may not be stopped until after this */
797 fcoe_interface_put(fcoe);
799 /* Free queued packets for the per-CPU receive threads */
800 fcoe_percpu_clean(lport);
802 /* Detach from the scsi-ml */
803 fc_remove_host(lport->host);
804 scsi_remove_host(lport->host);
806 /* There are no more rports or I/O, free the EM */
807 fc_exch_mgr_free(lport);
809 /* Free memory used by statistical counters */
810 fc_lport_free_stats(lport);
812 /* Release the Scsi_Host */
813 scsi_host_put(lport->host);
817 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
818 * @lport: The local port to setup DDP for
819 * @xid: The exchange ID for this DDP transfer
820 * @sgl: The scatterlist describing this transfer
821 * @sgc: The number of sg items
823 * Returns: 0 if the DDP context was not configured
825 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
826 struct scatterlist *sgl, unsigned int sgc)
828 struct net_device *netdev = fcoe_netdev(lport);
830 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
831 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
839 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
840 * @lport: The local port to complete DDP on
841 * @xid: The exchange ID for this DDP transfer
843 * Returns: the length of data that have been completed by DDP
845 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
847 struct net_device *netdev = fcoe_netdev(lport);
849 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
850 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
855 * fcoe_if_create() - Create a FCoE instance on an interface
856 * @fcoe: The FCoE interface to create a local port on
857 * @parent: The device pointer to be the parent in sysfs for the SCSI host
858 * @npiv: Indicates if the port is a vport or not
860 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
862 * Returns: The allocated fc_lport or an error pointer
864 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
865 struct device *parent, int npiv)
867 struct net_device *netdev = fcoe->netdev;
868 struct fc_lport *lport = NULL;
869 struct fcoe_port *port;
870 struct Scsi_Host *shost;
873 * parent is only a vport if npiv is 1,
874 * but we'll only use vport in that case so go ahead and set it
876 struct fc_vport *vport = dev_to_vport(parent);
878 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
881 lport = libfc_host_alloc(&fcoe_shost_template,
882 sizeof(struct fcoe_port));
884 lport = libfc_vport_create(vport,
885 sizeof(struct fcoe_port));
888 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
893 port = lport_priv(lport);
896 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
898 /* configure a fc_lport including the exchange manager */
899 rc = fcoe_lport_config(lport);
901 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
907 FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n",
908 vport->node_name, vport->port_name);
909 fc_set_wwnn(lport, vport->node_name);
910 fc_set_wwpn(lport, vport->port_name);
913 /* configure lport network properties */
914 rc = fcoe_netdev_config(lport, netdev);
916 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
921 /* configure lport scsi host properties */
922 rc = fcoe_shost_config(lport, shost, parent);
924 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
929 /* Initialize the library */
930 rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ);
932 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
939 * fcoe_em_alloc() and fcoe_hostlist_add() both
940 * need to be atomic with respect to other changes to the
941 * hostlist since fcoe_em_alloc() looks for an existing EM
942 * instance on host list updated by fcoe_hostlist_add().
944 * This is currently handled through the fcoe_config_mutex
948 /* lport exch manager allocation */
949 rc = fcoe_em_config(lport);
951 FCOE_NETDEV_DBG(netdev, "Could not configure the EM "
952 "for the interface\n");
957 fcoe_interface_get(fcoe);
961 fc_exch_mgr_free(lport);
963 scsi_host_put(lport->host);
969 * fcoe_if_init() - Initialization routine for fcoe.ko
971 * Attaches the SW FCoE transport to the FC transport
973 * Returns: 0 on success
975 static int __init fcoe_if_init(void)
977 /* attach to scsi transport */
978 fcoe_transport_template = fc_attach_transport(&fcoe_transport_function);
979 fcoe_vport_transport_template =
980 fc_attach_transport(&fcoe_vport_transport_function);
982 if (!fcoe_transport_template) {
983 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
991 * fcoe_if_exit() - Tear down fcoe.ko
993 * Detaches the SW FCoE transport from the FC transport
995 * Returns: 0 on success
997 int __exit fcoe_if_exit(void)
999 fc_release_transport(fcoe_transport_template);
1000 fc_release_transport(fcoe_vport_transport_template);
1001 fcoe_transport_template = NULL;
1002 fcoe_vport_transport_template = NULL;
1007 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1008 * @cpu: The CPU index of the CPU to create a receive thread for
1010 static void fcoe_percpu_thread_create(unsigned int cpu)
1012 struct fcoe_percpu_s *p;
1013 struct task_struct *thread;
1015 p = &per_cpu(fcoe_percpu, cpu);
1017 thread = kthread_create(fcoe_percpu_receive_thread,
1018 (void *)p, "fcoethread/%d", cpu);
1020 if (likely(!IS_ERR(thread))) {
1021 kthread_bind(thread, cpu);
1022 wake_up_process(thread);
1024 spin_lock_bh(&p->fcoe_rx_list.lock);
1026 spin_unlock_bh(&p->fcoe_rx_list.lock);
1031 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1032 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1034 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1035 * current CPU's Rx thread. If the thread being destroyed is bound to
1036 * the CPU processing this context the skbs will be freed.
1038 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1040 struct fcoe_percpu_s *p;
1041 struct task_struct *thread;
1042 struct page *crc_eof;
1043 struct sk_buff *skb;
1045 struct fcoe_percpu_s *p0;
1046 unsigned targ_cpu = smp_processor_id();
1047 #endif /* CONFIG_SMP */
1049 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1051 /* Prevent any new skbs from being queued for this CPU. */
1052 p = &per_cpu(fcoe_percpu, cpu);
1053 spin_lock_bh(&p->fcoe_rx_list.lock);
1056 crc_eof = p->crc_eof_page;
1057 p->crc_eof_page = NULL;
1058 p->crc_eof_offset = 0;
1059 spin_unlock_bh(&p->fcoe_rx_list.lock);
1063 * Don't bother moving the skb's if this context is running
1064 * on the same CPU that is having its thread destroyed. This
1065 * can easily happen when the module is removed.
1067 if (cpu != targ_cpu) {
1068 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1069 spin_lock_bh(&p0->fcoe_rx_list.lock);
1071 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1074 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1075 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1076 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1079 * The targeted CPU is not initialized and cannot accept
1080 * new skbs. Unlock the targeted CPU and drop the skbs
1081 * on the CPU that is going offline.
1083 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1085 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1089 * This scenario occurs when the module is being removed
1090 * and all threads are being destroyed. skbs will continue
1091 * to be shifted from the CPU thread that is being removed
1092 * to the CPU thread associated with the CPU that is processing
1093 * the module removal. Once there is only one CPU Rx thread it
1094 * will reach this case and we will drop all skbs and later
1097 spin_lock_bh(&p->fcoe_rx_list.lock);
1098 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1100 spin_unlock_bh(&p->fcoe_rx_list.lock);
1104 * This a non-SMP scenario where the singular Rx thread is
1105 * being removed. Free all skbs and stop the thread.
1107 spin_lock_bh(&p->fcoe_rx_list.lock);
1108 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1110 spin_unlock_bh(&p->fcoe_rx_list.lock);
1114 kthread_stop(thread);
1121 * fcoe_cpu_callback() - Handler for CPU hotplug events
1122 * @nfb: The callback data block
1123 * @action: The event triggering the callback
1124 * @hcpu: The index of the CPU that the event is for
1126 * This creates or destroys per-CPU data for fcoe
1128 * Returns NOTIFY_OK always.
1130 static int fcoe_cpu_callback(struct notifier_block *nfb,
1131 unsigned long action, void *hcpu)
1133 unsigned cpu = (unsigned long)hcpu;
1137 case CPU_ONLINE_FROZEN:
1138 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1139 fcoe_percpu_thread_create(cpu);
1142 case CPU_DEAD_FROZEN:
1143 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1144 fcoe_percpu_thread_destroy(cpu);
1153 * fcoe_rcv() - Receive packets from a net device
1154 * @skb: The received packet
1155 * @netdev: The net device that the packet was received on
1156 * @ptype: The packet type context
1157 * @olddev: The last device net device
1159 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1160 * FC frame and passes the frame to libfc.
1162 * Returns: 0 for success
1164 int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1165 struct packet_type *ptype, struct net_device *olddev)
1167 struct fc_lport *lport;
1168 struct fcoe_rcv_info *fr;
1169 struct fcoe_interface *fcoe;
1170 struct fc_frame_header *fh;
1171 struct fcoe_percpu_s *fps;
1174 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1175 lport = fcoe->ctlr.lp;
1176 if (unlikely(!lport)) {
1177 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1180 if (!lport->link_up)
1183 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1184 "data:%p tail:%p end:%p sum:%d dev:%s",
1185 skb->len, skb->data_len, skb->head, skb->data,
1186 skb_tail_pointer(skb), skb_end_pointer(skb),
1187 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1189 /* check for FCOE packet type */
1190 if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
1191 FCOE_NETDEV_DBG(netdev, "Wrong FC type frame");
1196 * Check for minimum frame length, and make sure required FCoE
1197 * and FC headers are pulled into the linear data area.
1199 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1200 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1203 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1204 fh = (struct fc_frame_header *) skb_transport_header(skb);
1206 fr = fcoe_dev_from_skb(skb);
1211 * In case the incoming frame's exchange is originated from
1212 * the initiator, then received frame's exchange id is ANDed
1213 * with fc_cpu_mask bits to get the same cpu on which exchange
1214 * was originated, otherwise just use the current cpu.
1216 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1217 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1219 cpu = smp_processor_id();
1221 fps = &per_cpu(fcoe_percpu, cpu);
1222 spin_lock_bh(&fps->fcoe_rx_list.lock);
1223 if (unlikely(!fps->thread)) {
1225 * The targeted CPU is not ready, let's target
1226 * the first CPU now. For non-SMP systems this
1227 * will check the same CPU twice.
1229 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1230 "ready for incoming skb- using first online "
1233 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1234 cpu = first_cpu(cpu_online_map);
1235 fps = &per_cpu(fcoe_percpu, cpu);
1236 spin_lock_bh(&fps->fcoe_rx_list.lock);
1238 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1244 * We now have a valid CPU that we're targeting for
1245 * this skb. We also have this receive thread locked,
1246 * so we're free to queue skbs into it's queue.
1249 /* If this is a SCSI-FCP frame, and this is already executing on the
1250 * correct CPU, and the queue for this CPU is empty, then go ahead
1251 * and process the frame directly in the softirq context.
1252 * This lets us process completions without context switching from the
1253 * NET_RX softirq, to our receive processing thread, and then back to
1254 * BLOCK softirq context.
1256 if (fh->fh_type == FC_TYPE_FCP &&
1257 cpu == smp_processor_id() &&
1258 skb_queue_empty(&fps->fcoe_rx_list)) {
1259 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1260 fcoe_recv_frame(skb);
1262 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1263 if (fps->fcoe_rx_list.qlen == 1)
1264 wake_up_process(fps->thread);
1265 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1270 fc_lport_get_stats(lport)->ErrorFrames++;
1278 * fcoe_start_io() - Start FCoE I/O
1279 * @skb: The packet to be transmitted
1281 * This routine is called from the net device to start transmitting
1284 * Returns: 0 for success
1286 static inline int fcoe_start_io(struct sk_buff *skb)
1288 struct sk_buff *nskb;
1291 nskb = skb_clone(skb, GFP_ATOMIC);
1292 rc = dev_queue_xmit(nskb);
1300 * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1301 * @skb: The packet to be transmitted
1302 * @tlen: The total length of the trailer
1304 * This routine allocates a page for frame trailers. The page is re-used if
1305 * there is enough room left on it for the current trailer. If there isn't
1306 * enough buffer left a new page is allocated for the trailer. Reference to
1307 * the page from this function as well as the skbs using the page fragments
1308 * ensure that the page is freed at the appropriate time.
1310 * Returns: 0 for success
1312 static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
1314 struct fcoe_percpu_s *fps;
1317 fps = &get_cpu_var(fcoe_percpu);
1318 page = fps->crc_eof_page;
1320 page = alloc_page(GFP_ATOMIC);
1322 put_cpu_var(fcoe_percpu);
1325 fps->crc_eof_page = page;
1326 fps->crc_eof_offset = 0;
1330 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
1331 fps->crc_eof_offset, tlen);
1333 skb->data_len += tlen;
1334 skb->truesize += tlen;
1335 fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
1337 if (fps->crc_eof_offset >= PAGE_SIZE) {
1338 fps->crc_eof_page = NULL;
1339 fps->crc_eof_offset = 0;
1342 put_cpu_var(fcoe_percpu);
1347 * fcoe_fc_crc() - Calculates the CRC for a given frame
1348 * @fp: The frame to be checksumed
1350 * This uses crc32() routine to calculate the CRC for a frame
1352 * Return: The 32 bit CRC value
1354 u32 fcoe_fc_crc(struct fc_frame *fp)
1356 struct sk_buff *skb = fp_skb(fp);
1357 struct skb_frag_struct *frag;
1358 unsigned char *data;
1359 unsigned long off, len, clen;
1363 crc = crc32(~0, skb->data, skb_headlen(skb));
1365 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1366 frag = &skb_shinfo(skb)->frags[i];
1367 off = frag->page_offset;
1370 clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
1371 data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
1372 KM_SKB_DATA_SOFTIRQ);
1373 crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
1374 kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
1383 * fcoe_xmit() - Transmit a FCoE frame
1384 * @lport: The local port that the frame is to be transmitted for
1385 * @fp: The frame to be transmitted
1387 * Return: 0 for success
1389 int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1394 struct fcoe_crc_eof *cp;
1395 struct sk_buff *skb;
1396 struct fcoe_dev_stats *stats;
1397 struct fc_frame_header *fh;
1398 unsigned int hlen; /* header length implies the version */
1399 unsigned int tlen; /* trailer length */
1400 unsigned int elen; /* eth header, may include vlan */
1401 struct fcoe_port *port = lport_priv(lport);
1402 struct fcoe_interface *fcoe = port->fcoe;
1404 struct fcoe_hdr *hp;
1406 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1408 fh = fc_frame_header_get(fp);
1410 wlen = skb->len / FCOE_WORD_TO_BYTE;
1412 if (!lport->link_up) {
1417 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1418 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1424 elen = sizeof(struct ethhdr);
1425 hlen = sizeof(struct fcoe_hdr);
1426 tlen = sizeof(struct fcoe_crc_eof);
1427 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1430 if (likely(lport->crc_offload)) {
1431 skb->ip_summed = CHECKSUM_PARTIAL;
1432 skb->csum_start = skb_headroom(skb);
1433 skb->csum_offset = skb->len;
1436 skb->ip_summed = CHECKSUM_NONE;
1437 crc = fcoe_fc_crc(fp);
1440 /* copy port crc and eof to the skb buff */
1441 if (skb_is_nonlinear(skb)) {
1443 if (fcoe_get_paged_crc_eof(skb, tlen)) {
1447 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1448 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1449 + frag->page_offset;
1451 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1454 memset(cp, 0, sizeof(*cp));
1456 cp->fcoe_crc32 = cpu_to_le32(~crc);
1458 if (skb_is_nonlinear(skb)) {
1459 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1463 /* adjust skb network/transport offsets to match mac/fcoe/port */
1464 skb_push(skb, elen + hlen);
1465 skb_reset_mac_header(skb);
1466 skb_reset_network_header(skb);
1467 skb->mac_len = elen;
1468 skb->protocol = htons(ETH_P_FCOE);
1469 skb->dev = fcoe->netdev;
1471 /* fill up mac and fcoe headers */
1473 eh->h_proto = htons(ETH_P_FCOE);
1474 if (fcoe->ctlr.map_dest)
1475 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
1477 /* insert GW address */
1478 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1480 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1481 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1483 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1485 hp = (struct fcoe_hdr *)(eh + 1);
1486 memset(hp, 0, sizeof(*hp));
1488 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1491 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1492 if (lport->seq_offload && fr_max_payload(fp)) {
1493 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1494 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1496 skb_shinfo(skb)->gso_type = 0;
1497 skb_shinfo(skb)->gso_size = 0;
1499 /* update tx stats: regardless if LLD fails */
1500 stats = fc_lport_get_stats(lport);
1502 stats->TxWords += wlen;
1504 /* send down to lld */
1506 if (port->fcoe_pending_queue.qlen)
1507 fcoe_check_wait_queue(lport, skb);
1508 else if (fcoe_start_io(skb))
1509 fcoe_check_wait_queue(lport, skb);
1515 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1516 * @skb: The completed skb (argument required by destructor)
1518 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1520 complete(&fcoe_flush_completion);
1524 * fcoe_recv_frame() - process a single received frame
1525 * @skb: frame to process
1527 static void fcoe_recv_frame(struct sk_buff *skb)
1530 struct fc_lport *lport;
1531 struct fcoe_rcv_info *fr;
1532 struct fcoe_dev_stats *stats;
1533 struct fc_frame_header *fh;
1534 struct fcoe_crc_eof crc_eof;
1535 struct fc_frame *fp;
1537 struct fcoe_port *port;
1538 struct fcoe_hdr *hp;
1540 fr = fcoe_dev_from_skb(skb);
1542 if (unlikely(!lport)) {
1543 if (skb->destructor != fcoe_percpu_flush_done)
1544 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1549 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1550 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1551 skb->len, skb->data_len,
1552 skb->head, skb->data, skb_tail_pointer(skb),
1553 skb_end_pointer(skb), skb->csum,
1554 skb->dev ? skb->dev->name : "<NULL>");
1557 * Save source MAC address before discarding header.
1559 port = lport_priv(lport);
1560 if (skb_is_nonlinear(skb))
1561 skb_linearize(skb); /* not ideal */
1562 mac = eth_hdr(skb)->h_source;
1565 * Frame length checks and setting up the header pointers
1566 * was done in fcoe_rcv already.
1568 hp = (struct fcoe_hdr *) skb_network_header(skb);
1569 fh = (struct fc_frame_header *) skb_transport_header(skb);
1571 stats = fc_lport_get_stats(lport);
1572 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1573 if (stats->ErrorFrames < 5)
1574 printk(KERN_WARNING "fcoe: FCoE version "
1575 "mismatch: The frame has "
1576 "version %x, but the "
1577 "initiator supports version "
1578 "%x\n", FC_FCOE_DECAPS_VER(hp),
1580 stats->ErrorFrames++;
1585 skb_pull(skb, sizeof(struct fcoe_hdr));
1586 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1589 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1591 fp = (struct fc_frame *)skb;
1594 fr_sof(fp) = hp->fcoe_sof;
1596 /* Copy out the CRC and EOF trailer for access */
1597 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
1601 fr_eof(fp) = crc_eof.fcoe_eof;
1602 fr_crc(fp) = crc_eof.fcoe_crc32;
1603 if (pskb_trim(skb, fr_len)) {
1609 * We only check CRC if no offload is available and if it is
1610 * it's solicited data, in which case, the FCP layer would
1611 * check it during the copy.
1613 if (lport->crc_offload &&
1614 skb->ip_summed == CHECKSUM_UNNECESSARY)
1615 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1617 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1619 fh = fc_frame_header_get(fp);
1620 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
1621 fh->fh_type == FC_TYPE_FCP) {
1622 fc_exch_recv(lport, fp);
1625 if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
1626 if (le32_to_cpu(fr_crc(fp)) !=
1627 ~crc32(~0, skb->data, fr_len)) {
1628 if (stats->InvalidCRCCount < 5)
1629 printk(KERN_WARNING "fcoe: dropping "
1630 "frame with CRC error\n");
1631 stats->InvalidCRCCount++;
1632 stats->ErrorFrames++;
1636 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1638 fc_exch_recv(lport, fp);
1642 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1643 * @arg: The per-CPU context
1645 * Return: 0 for success
1647 int fcoe_percpu_receive_thread(void *arg)
1649 struct fcoe_percpu_s *p = arg;
1650 struct sk_buff *skb;
1652 set_user_nice(current, -20);
1654 while (!kthread_should_stop()) {
1656 spin_lock_bh(&p->fcoe_rx_list.lock);
1657 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1658 set_current_state(TASK_INTERRUPTIBLE);
1659 spin_unlock_bh(&p->fcoe_rx_list.lock);
1661 set_current_state(TASK_RUNNING);
1662 if (kthread_should_stop())
1664 spin_lock_bh(&p->fcoe_rx_list.lock);
1666 spin_unlock_bh(&p->fcoe_rx_list.lock);
1667 fcoe_recv_frame(skb);
1673 * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
1674 * @lport: The local port whose backlog is to be cleared
1676 * This empties the wait_queue, dequeues the head of the wait_queue queue
1677 * and calls fcoe_start_io() for each packet. If all skb have been
1678 * transmitted it returns the qlen. If an error occurs it restores
1679 * wait_queue (to try again later) and returns -1.
1681 * The wait_queue is used when the skb transmit fails. The failed skb
1682 * will go in the wait_queue which will be emptied by the timer function or
1683 * by the next skb transmit.
1685 static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
1687 struct fcoe_port *port = lport_priv(lport);
1690 spin_lock_bh(&port->fcoe_pending_queue.lock);
1693 __skb_queue_tail(&port->fcoe_pending_queue, skb);
1695 if (port->fcoe_pending_queue_active)
1697 port->fcoe_pending_queue_active = 1;
1699 while (port->fcoe_pending_queue.qlen) {
1700 /* keep qlen > 0 until fcoe_start_io succeeds */
1701 port->fcoe_pending_queue.qlen++;
1702 skb = __skb_dequeue(&port->fcoe_pending_queue);
1704 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1705 rc = fcoe_start_io(skb);
1706 spin_lock_bh(&port->fcoe_pending_queue.lock);
1709 __skb_queue_head(&port->fcoe_pending_queue, skb);
1710 /* undo temporary increment above */
1711 port->fcoe_pending_queue.qlen--;
1714 /* undo temporary increment above */
1715 port->fcoe_pending_queue.qlen--;
1718 if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
1720 if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
1721 mod_timer(&port->timer, jiffies + 2);
1722 port->fcoe_pending_queue_active = 0;
1724 if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
1726 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1731 * fcoe_dev_setup() - Setup the link change notification interface
1733 static void fcoe_dev_setup(void)
1735 register_netdevice_notifier(&fcoe_notifier);
1739 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1741 static void fcoe_dev_cleanup(void)
1743 unregister_netdevice_notifier(&fcoe_notifier);
1747 * fcoe_device_notification() - Handler for net device events
1748 * @notifier: The context of the notification
1749 * @event: The type of event
1750 * @ptr: The net device that the event was on
1752 * This function is called by the Ethernet driver in case of link change event.
1754 * Returns: 0 for success
1756 static int fcoe_device_notification(struct notifier_block *notifier,
1757 ulong event, void *ptr)
1759 struct fc_lport *lport = NULL;
1760 struct net_device *netdev = ptr;
1761 struct fcoe_interface *fcoe;
1762 struct fcoe_port *port;
1763 struct fcoe_dev_stats *stats;
1764 u32 link_possible = 1;
1768 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1769 if (fcoe->netdev == netdev) {
1770 lport = fcoe->ctlr.lp;
1781 case NETDEV_GOING_DOWN:
1787 case NETDEV_CHANGEMTU:
1788 if (netdev->features & NETIF_F_FCOE_MTU)
1790 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1791 sizeof(struct fcoe_crc_eof));
1792 if (mfs >= FC_MIN_MAX_FRAME)
1793 fc_set_mfs(lport, mfs);
1795 case NETDEV_REGISTER:
1797 case NETDEV_UNREGISTER:
1798 list_del(&fcoe->list);
1799 port = lport_priv(fcoe->ctlr.lp);
1800 fcoe_interface_cleanup(fcoe);
1801 schedule_work(&port->destroy_work);
1805 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1806 "from netdev netlink\n", event);
1808 if (link_possible && !fcoe_link_ok(lport))
1809 fcoe_ctlr_link_up(&fcoe->ctlr);
1810 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1811 stats = fc_lport_get_stats(lport);
1812 stats->LinkFailureCount++;
1813 fcoe_clean_pending_queue(lport);
1820 * fcoe_if_to_netdev() - Parse a name buffer to get a net device
1821 * @buffer: The name of the net device
1823 * Returns: NULL or a ptr to net_device
1825 static struct net_device *fcoe_if_to_netdev(const char *buffer)
1828 char ifname[IFNAMSIZ + 2];
1831 strlcpy(ifname, buffer, IFNAMSIZ);
1832 cp = ifname + strlen(ifname);
1833 while (--cp >= ifname && *cp == '\n')
1835 return dev_get_by_name(&init_net, ifname);
1841 * fcoe_destroy() - Destroy a FCoE interface
1842 * @buffer: The name of the Ethernet interface to be destroyed
1843 * @kp: The associated kernel parameter
1845 * Called from sysfs.
1847 * Returns: 0 for success
1849 static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
1851 struct fcoe_interface *fcoe;
1852 struct net_device *netdev;
1855 mutex_lock(&fcoe_config_mutex);
1856 #ifdef CONFIG_FCOE_MODULE
1858 * Make sure the module has been initialized, and is not about to be
1859 * removed. Module paramter sysfs files are writable before the
1860 * module_init function is called and after module_exit.
1862 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1868 netdev = fcoe_if_to_netdev(buffer);
1875 fcoe = fcoe_hostlist_lookup_port(netdev);
1881 list_del(&fcoe->list);
1882 fcoe_interface_cleanup(fcoe);
1884 fcoe_if_destroy(fcoe->ctlr.lp);
1888 mutex_unlock(&fcoe_config_mutex);
1893 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1894 * @work: Handle to the FCoE port to be destroyed
1896 static void fcoe_destroy_work(struct work_struct *work)
1898 struct fcoe_port *port;
1900 port = container_of(work, struct fcoe_port, destroy_work);
1901 mutex_lock(&fcoe_config_mutex);
1902 fcoe_if_destroy(port->lport);
1903 mutex_unlock(&fcoe_config_mutex);
1907 * fcoe_create() - Create a fcoe interface
1908 * @buffer: The name of the Ethernet interface to create on
1909 * @kp: The associated kernel param
1911 * Called from sysfs.
1913 * Returns: 0 for success
1915 static int fcoe_create(const char *buffer, struct kernel_param *kp)
1918 struct fcoe_interface *fcoe;
1919 struct fc_lport *lport;
1920 struct net_device *netdev;
1922 mutex_lock(&fcoe_config_mutex);
1923 #ifdef CONFIG_FCOE_MODULE
1925 * Make sure the module has been initialized, and is not about to be
1926 * removed. Module paramter sysfs files are writable before the
1927 * module_init function is called and after module_exit.
1929 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1936 netdev = fcoe_if_to_netdev(buffer);
1942 /* look for existing lport */
1943 if (fcoe_hostlist_lookup(netdev)) {
1948 fcoe = fcoe_interface_create(netdev);
1954 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
1955 if (IS_ERR(lport)) {
1956 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
1959 fcoe_interface_cleanup(fcoe);
1963 /* Make this the "master" N_Port */
1964 fcoe->ctlr.lp = lport;
1966 /* add to lports list */
1967 fcoe_hostlist_add(lport);
1969 /* start FIP Discovery and FLOGI */
1970 lport->boot_time = jiffies;
1971 fc_fabric_login(lport);
1972 if (!fcoe_link_ok(lport))
1973 fcoe_ctlr_link_up(&fcoe->ctlr);
1978 * Release from init in fcoe_interface_create(), on success lport
1979 * should be holding a reference taken in fcoe_if_create().
1981 fcoe_interface_put(fcoe);
1986 mutex_unlock(&fcoe_config_mutex);
1991 * fcoe_link_ok() - Check if the link is OK for a local port
1992 * @lport: The local port to check link on
1994 * Any permanently-disqualifying conditions have been previously checked.
1995 * This also updates the speed setting, which may change with link for 100/1000.
1997 * This function should probably be checking for PAUSE support at some point
1998 * in the future. Currently Per-priority-pause is not determinable using
1999 * ethtool, so we shouldn't be restrictive until that problem is resolved.
2001 * Returns: 0 if link is OK for use by FCoE.
2004 int fcoe_link_ok(struct fc_lport *lport)
2006 struct fcoe_port *port = lport_priv(lport);
2007 struct net_device *netdev = port->fcoe->netdev;
2008 struct ethtool_cmd ecmd = { ETHTOOL_GSET };
2010 if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) &&
2011 (!dev_ethtool_get_settings(netdev, &ecmd))) {
2012 lport->link_supported_speeds &=
2013 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
2014 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
2015 SUPPORTED_1000baseT_Full))
2016 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
2017 if (ecmd.supported & SUPPORTED_10000baseT_Full)
2018 lport->link_supported_speeds |=
2019 FC_PORTSPEED_10GBIT;
2020 if (ecmd.speed == SPEED_1000)
2021 lport->link_speed = FC_PORTSPEED_1GBIT;
2022 if (ecmd.speed == SPEED_10000)
2023 lport->link_speed = FC_PORTSPEED_10GBIT;
2031 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2032 * @lport: The local port whose skbs are to be cleared
2034 * Must be called with fcoe_create_mutex held to single-thread completion.
2036 * This flushes the pending skbs by adding a new skb to each queue and
2037 * waiting until they are all freed. This assures us that not only are
2038 * there no packets that will be handled by the lport, but also that any
2039 * threads already handling packet have returned.
2041 void fcoe_percpu_clean(struct fc_lport *lport)
2043 struct fcoe_percpu_s *pp;
2044 struct fcoe_rcv_info *fr;
2045 struct sk_buff_head *list;
2046 struct sk_buff *skb, *next;
2047 struct sk_buff *head;
2050 for_each_possible_cpu(cpu) {
2051 pp = &per_cpu(fcoe_percpu, cpu);
2052 spin_lock_bh(&pp->fcoe_rx_list.lock);
2053 list = &pp->fcoe_rx_list;
2055 for (skb = head; skb != (struct sk_buff *)list;
2058 fr = fcoe_dev_from_skb(skb);
2059 if (fr->fr_dev == lport) {
2060 __skb_unlink(skb, list);
2065 if (!pp->thread || !cpu_online(cpu)) {
2066 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2070 skb = dev_alloc_skb(0);
2072 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2075 skb->destructor = fcoe_percpu_flush_done;
2077 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2078 if (pp->fcoe_rx_list.qlen == 1)
2079 wake_up_process(pp->thread);
2080 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2082 wait_for_completion(&fcoe_flush_completion);
2087 * fcoe_clean_pending_queue() - Dequeue a skb and free it
2088 * @lport: The local port to dequeue a skb on
2090 void fcoe_clean_pending_queue(struct fc_lport *lport)
2092 struct fcoe_port *port = lport_priv(lport);
2093 struct sk_buff *skb;
2095 spin_lock_bh(&port->fcoe_pending_queue.lock);
2096 while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
2097 spin_unlock_bh(&port->fcoe_pending_queue.lock);
2099 spin_lock_bh(&port->fcoe_pending_queue.lock);
2101 spin_unlock_bh(&port->fcoe_pending_queue.lock);
2105 * fcoe_reset() - Reset a local port
2106 * @shost: The SCSI host associated with the local port to be reset
2108 * Returns: Always 0 (return value required by FC transport template)
2110 int fcoe_reset(struct Scsi_Host *shost)
2112 struct fc_lport *lport = shost_priv(shost);
2113 fc_lport_reset(lport);
2118 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2119 * @netdev: The net device used as a key
2121 * Locking: Must be called with the RNL mutex held.
2123 * Returns: NULL or the FCoE interface
2125 static struct fcoe_interface *
2126 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2128 struct fcoe_interface *fcoe;
2130 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2131 if (fcoe->netdev == netdev)
2138 * fcoe_hostlist_lookup() - Find the local port associated with a
2140 * @netdev: The netdevice used as a key
2142 * Locking: Must be called with the RTNL mutex held
2144 * Returns: NULL or the local port
2146 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2148 struct fcoe_interface *fcoe;
2150 fcoe = fcoe_hostlist_lookup_port(netdev);
2151 return (fcoe) ? fcoe->ctlr.lp : NULL;
2155 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2156 * port to the hostlist
2157 * @lport: The local port that identifies the FCoE interface to be added
2159 * Locking: must be called with the RTNL mutex held
2161 * Returns: 0 for success
2163 static int fcoe_hostlist_add(const struct fc_lport *lport)
2165 struct fcoe_interface *fcoe;
2166 struct fcoe_port *port;
2168 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2170 port = lport_priv(lport);
2172 list_add_tail(&fcoe->list, &fcoe_hostlist);
2178 * fcoe_init() - Initialize fcoe.ko
2180 * Returns: 0 on success, or a negative value on failure
2182 static int __init fcoe_init(void)
2184 struct fcoe_percpu_s *p;
2188 mutex_lock(&fcoe_config_mutex);
2190 for_each_possible_cpu(cpu) {
2191 p = &per_cpu(fcoe_percpu, cpu);
2192 skb_queue_head_init(&p->fcoe_rx_list);
2195 for_each_online_cpu(cpu)
2196 fcoe_percpu_thread_create(cpu);
2198 /* Initialize per CPU interrupt thread */
2199 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2203 /* Setup link change notification */
2206 rc = fcoe_if_init();
2210 mutex_unlock(&fcoe_config_mutex);
2214 for_each_online_cpu(cpu) {
2215 fcoe_percpu_thread_destroy(cpu);
2217 mutex_unlock(&fcoe_config_mutex);
2220 module_init(fcoe_init);
2223 * fcoe_exit() - Clean up fcoe.ko
2225 * Returns: 0 on success or a negative value on failure
2227 static void __exit fcoe_exit(void)
2229 struct fcoe_interface *fcoe, *tmp;
2230 struct fcoe_port *port;
2233 mutex_lock(&fcoe_config_mutex);
2237 /* releases the associated fcoe hosts */
2239 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2240 list_del(&fcoe->list);
2241 port = lport_priv(fcoe->ctlr.lp);
2242 fcoe_interface_cleanup(fcoe);
2243 schedule_work(&port->destroy_work);
2247 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2249 for_each_online_cpu(cpu)
2250 fcoe_percpu_thread_destroy(cpu);
2252 mutex_unlock(&fcoe_config_mutex);
2254 /* flush any asyncronous interface destroys,
2255 * this should happen after the netdev notifier is unregistered */
2256 flush_scheduled_work();
2257 /* That will flush out all the N_Ports on the hostlist, but now we
2258 * may have NPIV VN_Ports scheduled for destruction */
2259 flush_scheduled_work();
2261 /* detach from scsi transport
2262 * must happen after all destroys are done, therefor after the flush */
2265 module_exit(fcoe_exit);
2268 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2269 * @seq: active sequence in the FLOGI or FDISC exchange
2270 * @fp: response frame, or error encoded in a pointer (timeout)
2271 * @arg: pointer the the fcoe_ctlr structure
2273 * This handles MAC address managment for FCoE, then passes control on to
2274 * the libfc FLOGI response handler.
2276 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2278 struct fcoe_ctlr *fip = arg;
2279 struct fc_exch *exch = fc_seq_exch(seq);
2280 struct fc_lport *lport = exch->lp;
2286 mac = fr_cb(fp)->granted_mac;
2287 if (is_zero_ether_addr(mac)) {
2289 if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
2294 fcoe_update_src_mac(lport, mac);
2296 fc_lport_flogi_resp(seq, fp, lport);
2300 * fcoe_logo_resp() - FCoE specific LOGO response handler
2301 * @seq: active sequence in the LOGO exchange
2302 * @fp: response frame, or error encoded in a pointer (timeout)
2303 * @arg: pointer the the fcoe_ctlr structure
2305 * This handles MAC address managment for FCoE, then passes control on to
2306 * the libfc LOGO response handler.
2308 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2310 struct fc_lport *lport = arg;
2311 static u8 zero_mac[ETH_ALEN] = { 0 };
2314 fcoe_update_src_mac(lport, zero_mac);
2315 fc_lport_logo_resp(seq, fp, lport);
2319 * fcoe_elsct_send - FCoE specific ELS handler
2321 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2322 * using FCoE specific response handlers and passing the FIP controller as
2323 * the argument (the lport is still available from the exchange).
2325 * Most of the work here is just handed off to the libfc routine.
2327 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2328 struct fc_frame *fp, unsigned int op,
2329 void (*resp)(struct fc_seq *,
2332 void *arg, u32 timeout)
2334 struct fcoe_port *port = lport_priv(lport);
2335 struct fcoe_interface *fcoe = port->fcoe;
2336 struct fcoe_ctlr *fip = &fcoe->ctlr;
2337 struct fc_frame_header *fh = fc_frame_header_get(fp);
2342 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2345 /* only hook onto fabric logouts, not port logouts */
2346 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2348 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2351 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2355 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2356 * @vport: fc_vport object to create a new fc_host for
2357 * @disabled: start the new fc_host in a disabled state by default?
2359 * Returns: 0 for success
2361 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2363 struct Scsi_Host *shost = vport_to_shost(vport);
2364 struct fc_lport *n_port = shost_priv(shost);
2365 struct fcoe_port *port = lport_priv(n_port);
2366 struct fcoe_interface *fcoe = port->fcoe;
2367 struct net_device *netdev = fcoe->netdev;
2368 struct fc_lport *vn_port;
2370 mutex_lock(&fcoe_config_mutex);
2371 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2372 mutex_unlock(&fcoe_config_mutex);
2374 if (IS_ERR(vn_port)) {
2375 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2381 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2383 vn_port->boot_time = jiffies;
2384 fc_fabric_login(vn_port);
2385 fc_vport_setlink(vn_port);
2391 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2392 * @vport: fc_vport object that is being destroyed
2394 * Returns: 0 for success
2396 static int fcoe_vport_destroy(struct fc_vport *vport)
2398 struct Scsi_Host *shost = vport_to_shost(vport);
2399 struct fc_lport *n_port = shost_priv(shost);
2400 struct fc_lport *vn_port = vport->dd_data;
2401 struct fcoe_port *port = lport_priv(vn_port);
2403 mutex_lock(&n_port->lp_mutex);
2404 list_del(&vn_port->list);
2405 mutex_unlock(&n_port->lp_mutex);
2406 schedule_work(&port->destroy_work);
2411 * fcoe_vport_disable() - change vport state
2412 * @vport: vport to bring online/offline
2413 * @disable: should the vport be disabled?
2415 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2417 struct fc_lport *lport = vport->dd_data;
2420 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2421 fc_fabric_logoff(lport);
2423 lport->boot_time = jiffies;
2424 fc_fabric_login(lport);
2425 fc_vport_setlink(lport);
2432 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2433 * @vport: fc_vport with a new symbolic name string
2435 * After generating a new symbolic name string, a new RSPN_ID request is
2436 * sent to the name server. There is no response handler, so if it fails
2437 * for some reason it will not be retried.
2439 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2441 struct fc_lport *lport = vport->dd_data;
2442 struct fc_frame *fp;
2445 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2446 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2447 fcoe_netdev(lport)->name, vport->symbolic_name);
2449 if (lport->state != LPORT_ST_READY)
2452 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2453 fp = fc_frame_alloc(lport,
2454 sizeof(struct fc_ct_hdr) +
2455 sizeof(struct fc_ns_rspn) + len);
2458 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2459 NULL, NULL, 3 * lport->r_a_tov);
2463 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2464 * @lport: the local port
2465 * @fc_lesb: the link error status block
2467 static void fcoe_get_lesb(struct fc_lport *lport,
2468 struct fc_els_lesb *fc_lesb)
2471 u32 lfc, vlfc, mdac;
2472 struct fcoe_dev_stats *devst;
2473 struct fcoe_fc_els_lesb *lesb;
2474 struct net_device *netdev = fcoe_netdev(lport);
2479 lesb = (struct fcoe_fc_els_lesb *)fc_lesb;
2480 memset(lesb, 0, sizeof(*lesb));
2481 for_each_possible_cpu(cpu) {
2482 devst = per_cpu_ptr(lport->dev_stats, cpu);
2483 lfc += devst->LinkFailureCount;
2484 vlfc += devst->VLinkFailureCount;
2485 mdac += devst->MissDiscAdvCount;
2487 lesb->lesb_link_fail = htonl(lfc);
2488 lesb->lesb_vlink_fail = htonl(vlfc);
2489 lesb->lesb_miss_fka = htonl(mdac);
2490 lesb->lesb_fcs_error = htonl(dev_get_stats(netdev)->rx_crc_errors);