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_get_wwn() - Get the world wide name from LLD if it supports it
549 * @netdev: the associated net device
550 * @wwn: the output WWN
551 * @type: the type of WWN (WWPN or WWNN)
553 * Returns: 0 for success
555 static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
557 const struct net_device_ops *ops = netdev->netdev_ops;
559 if (ops->ndo_fcoe_get_wwn)
560 return ops->ndo_fcoe_get_wwn(netdev, wwn, type);
565 * fcoe_netdev_config() - Set up net devive for SW FCoE
566 * @lport: The local port that is associated with the net device
567 * @netdev: The associated net device
569 * Must be called after fcoe_lport_config() as it will use local port mutex
571 * Returns: 0 for success
573 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
577 struct fcoe_interface *fcoe;
578 struct fcoe_port *port;
581 /* Setup lport private data to point to fcoe softc */
582 port = lport_priv(lport);
586 * Determine max frame size based on underlying device and optional
587 * user-configured limit. If the MFS is too low, fcoe_link_ok()
588 * will return 0, so do this first.
591 if (netdev->features & NETIF_F_FCOE_MTU) {
593 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
595 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
596 if (fc_set_mfs(lport, mfs))
599 /* offload features support */
600 if (netdev->features & NETIF_F_SG)
603 if (netdev->features & NETIF_F_FCOE_CRC) {
604 lport->crc_offload = 1;
605 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
607 if (netdev->features & NETIF_F_FSO) {
608 lport->seq_offload = 1;
609 lport->lso_max = netdev->gso_max_size;
610 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
613 if (netdev->fcoe_ddp_xid) {
614 lport->lro_enabled = 1;
615 lport->lro_xid = netdev->fcoe_ddp_xid;
616 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
619 skb_queue_head_init(&port->fcoe_pending_queue);
620 port->fcoe_pending_queue_active = 0;
621 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
625 * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN:
626 * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0.
627 * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID
629 if (netdev->priv_flags & IFF_802_1Q_VLAN)
630 vid = vlan_dev_vlan_id(netdev);
632 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
633 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
634 fc_set_wwnn(lport, wwnn);
635 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
636 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr,
638 fc_set_wwpn(lport, wwpn);
645 * fcoe_shost_config() - Set up the SCSI host associated with a local port
646 * @lport: The local port
647 * @shost: The SCSI host to associate with the local port
648 * @dev: The device associated with the SCSI host
650 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
652 * Returns: 0 for success
654 static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost,
659 /* lport scsi host config */
660 lport->host->max_lun = FCOE_MAX_LUN;
661 lport->host->max_id = FCOE_MAX_FCP_TARGET;
662 lport->host->max_channel = 0;
664 lport->host->transportt = fcoe_vport_transport_template;
666 lport->host->transportt = fcoe_transport_template;
668 /* add the new host to the SCSI-ml */
669 rc = scsi_add_host(lport->host, dev);
671 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
672 "error on scsi_add_host\n");
677 fc_host_max_npiv_vports(lport->host) = USHORT_MAX;
679 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
680 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
681 fcoe_netdev(lport)->name);
687 * fcoe_oem_match() - The match routine for the offloaded exchange manager
690 * This routine will be associated with an exchange manager (EM). When
691 * the libfc exchange handling code is looking for an EM to use it will
692 * call this routine and pass it the frame that it wishes to send. This
693 * routine will return True if the associated EM is to be used and False
694 * if the echange code should continue looking for an EM.
696 * The offload EM that this routine is associated with will handle any
697 * packets that are for SCSI read requests.
699 * Returns: True for read types I/O, otherwise returns false.
701 bool fcoe_oem_match(struct fc_frame *fp)
703 return fc_fcp_is_read(fr_fsp(fp)) &&
704 (fr_fsp(fp)->data_len > fcoe_ddp_min);
708 * fcoe_em_config() - Allocate and configure an exchange manager
709 * @lport: The local port that the new EM will be associated with
711 * Returns: 0 on success
713 static inline int fcoe_em_config(struct fc_lport *lport)
715 struct fcoe_port *port = lport_priv(lport);
716 struct fcoe_interface *fcoe = port->fcoe;
717 struct fcoe_interface *oldfcoe = NULL;
718 struct net_device *old_real_dev, *cur_real_dev;
719 u16 min_xid = FCOE_MIN_XID;
720 u16 max_xid = FCOE_MAX_XID;
723 * Check if need to allocate an em instance for
724 * offload exchange ids to be shared across all VN_PORTs/lport.
726 if (!lport->lro_enabled || !lport->lro_xid ||
727 (lport->lro_xid >= max_xid)) {
733 * Reuse existing offload em instance in case
734 * it is already allocated on real eth device
736 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
737 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
739 cur_real_dev = fcoe->netdev;
741 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
742 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
743 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
745 old_real_dev = oldfcoe->netdev;
747 if (cur_real_dev == old_real_dev) {
748 fcoe->oem = oldfcoe->oem;
754 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
755 printk(KERN_ERR "fcoe_em_config: failed to add "
756 "offload em:%p on interface:%s\n",
757 fcoe->oem, fcoe->netdev->name);
761 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
762 FCOE_MIN_XID, lport->lro_xid,
765 printk(KERN_ERR "fcoe_em_config: failed to allocate "
766 "em for offload exches on interface:%s\n",
773 * Exclude offload EM xid range from next EM xid range.
775 min_xid += lport->lro_xid + 1;
778 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
779 printk(KERN_ERR "fcoe_em_config: failed to "
780 "allocate em on interface %s\n", fcoe->netdev->name);
788 * fcoe_if_destroy() - Tear down a SW FCoE instance
789 * @lport: The local port to be destroyed
791 static void fcoe_if_destroy(struct fc_lport *lport)
793 struct fcoe_port *port = lport_priv(lport);
794 struct fcoe_interface *fcoe = port->fcoe;
795 struct net_device *netdev = fcoe->netdev;
797 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
799 /* Logout of the fabric */
800 fc_fabric_logoff(lport);
802 /* Cleanup the fc_lport */
803 fc_lport_destroy(lport);
804 fc_fcp_destroy(lport);
806 /* Stop the transmit retry timer */
807 del_timer_sync(&port->timer);
809 /* Free existing transmit skbs */
810 fcoe_clean_pending_queue(lport);
813 if (!is_zero_ether_addr(port->data_src_addr))
814 dev_unicast_delete(netdev, port->data_src_addr);
817 /* receives may not be stopped until after this */
818 fcoe_interface_put(fcoe);
820 /* Free queued packets for the per-CPU receive threads */
821 fcoe_percpu_clean(lport);
823 /* Detach from the scsi-ml */
824 fc_remove_host(lport->host);
825 scsi_remove_host(lport->host);
827 /* There are no more rports or I/O, free the EM */
828 fc_exch_mgr_free(lport);
830 /* Free memory used by statistical counters */
831 fc_lport_free_stats(lport);
833 /* Release the Scsi_Host */
834 scsi_host_put(lport->host);
838 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
839 * @lport: The local port to setup DDP for
840 * @xid: The exchange ID for this DDP transfer
841 * @sgl: The scatterlist describing this transfer
842 * @sgc: The number of sg items
844 * Returns: 0 if the DDP context was not configured
846 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
847 struct scatterlist *sgl, unsigned int sgc)
849 struct net_device *netdev = fcoe_netdev(lport);
851 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
852 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
860 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
861 * @lport: The local port to complete DDP on
862 * @xid: The exchange ID for this DDP transfer
864 * Returns: the length of data that have been completed by DDP
866 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
868 struct net_device *netdev = fcoe_netdev(lport);
870 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
871 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
876 * fcoe_if_create() - Create a FCoE instance on an interface
877 * @fcoe: The FCoE interface to create a local port on
878 * @parent: The device pointer to be the parent in sysfs for the SCSI host
879 * @npiv: Indicates if the port is a vport or not
881 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
883 * Returns: The allocated fc_lport or an error pointer
885 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
886 struct device *parent, int npiv)
888 struct net_device *netdev = fcoe->netdev;
889 struct fc_lport *lport = NULL;
890 struct fcoe_port *port;
891 struct Scsi_Host *shost;
894 * parent is only a vport if npiv is 1,
895 * but we'll only use vport in that case so go ahead and set it
897 struct fc_vport *vport = dev_to_vport(parent);
899 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
902 lport = libfc_host_alloc(&fcoe_shost_template,
903 sizeof(struct fcoe_port));
905 lport = libfc_vport_create(vport,
906 sizeof(struct fcoe_port));
909 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
914 port = lport_priv(lport);
917 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
919 /* configure a fc_lport including the exchange manager */
920 rc = fcoe_lport_config(lport);
922 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
928 FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n",
929 vport->node_name, vport->port_name);
930 fc_set_wwnn(lport, vport->node_name);
931 fc_set_wwpn(lport, vport->port_name);
934 /* configure lport network properties */
935 rc = fcoe_netdev_config(lport, netdev);
937 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
942 /* configure lport scsi host properties */
943 rc = fcoe_shost_config(lport, shost, parent);
945 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
950 /* Initialize the library */
951 rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ);
953 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
960 * fcoe_em_alloc() and fcoe_hostlist_add() both
961 * need to be atomic with respect to other changes to the
962 * hostlist since fcoe_em_alloc() looks for an existing EM
963 * instance on host list updated by fcoe_hostlist_add().
965 * This is currently handled through the fcoe_config_mutex
969 /* lport exch manager allocation */
970 rc = fcoe_em_config(lport);
972 FCOE_NETDEV_DBG(netdev, "Could not configure the EM "
973 "for the interface\n");
978 fcoe_interface_get(fcoe);
982 fc_exch_mgr_free(lport);
984 scsi_host_put(lport->host);
990 * fcoe_if_init() - Initialization routine for fcoe.ko
992 * Attaches the SW FCoE transport to the FC transport
994 * Returns: 0 on success
996 static int __init fcoe_if_init(void)
998 /* attach to scsi transport */
999 fcoe_transport_template = fc_attach_transport(&fcoe_transport_function);
1000 fcoe_vport_transport_template =
1001 fc_attach_transport(&fcoe_vport_transport_function);
1003 if (!fcoe_transport_template) {
1004 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1012 * fcoe_if_exit() - Tear down fcoe.ko
1014 * Detaches the SW FCoE transport from the FC transport
1016 * Returns: 0 on success
1018 int __exit fcoe_if_exit(void)
1020 fc_release_transport(fcoe_transport_template);
1021 fc_release_transport(fcoe_vport_transport_template);
1022 fcoe_transport_template = NULL;
1023 fcoe_vport_transport_template = NULL;
1028 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1029 * @cpu: The CPU index of the CPU to create a receive thread for
1031 static void fcoe_percpu_thread_create(unsigned int cpu)
1033 struct fcoe_percpu_s *p;
1034 struct task_struct *thread;
1036 p = &per_cpu(fcoe_percpu, cpu);
1038 thread = kthread_create(fcoe_percpu_receive_thread,
1039 (void *)p, "fcoethread/%d", cpu);
1041 if (likely(!IS_ERR(thread))) {
1042 kthread_bind(thread, cpu);
1043 wake_up_process(thread);
1045 spin_lock_bh(&p->fcoe_rx_list.lock);
1047 spin_unlock_bh(&p->fcoe_rx_list.lock);
1052 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1053 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1055 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1056 * current CPU's Rx thread. If the thread being destroyed is bound to
1057 * the CPU processing this context the skbs will be freed.
1059 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1061 struct fcoe_percpu_s *p;
1062 struct task_struct *thread;
1063 struct page *crc_eof;
1064 struct sk_buff *skb;
1066 struct fcoe_percpu_s *p0;
1067 unsigned targ_cpu = smp_processor_id();
1068 #endif /* CONFIG_SMP */
1070 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1072 /* Prevent any new skbs from being queued for this CPU. */
1073 p = &per_cpu(fcoe_percpu, cpu);
1074 spin_lock_bh(&p->fcoe_rx_list.lock);
1077 crc_eof = p->crc_eof_page;
1078 p->crc_eof_page = NULL;
1079 p->crc_eof_offset = 0;
1080 spin_unlock_bh(&p->fcoe_rx_list.lock);
1084 * Don't bother moving the skb's if this context is running
1085 * on the same CPU that is having its thread destroyed. This
1086 * can easily happen when the module is removed.
1088 if (cpu != targ_cpu) {
1089 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1090 spin_lock_bh(&p0->fcoe_rx_list.lock);
1092 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1095 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1096 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1097 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1100 * The targeted CPU is not initialized and cannot accept
1101 * new skbs. Unlock the targeted CPU and drop the skbs
1102 * on the CPU that is going offline.
1104 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1106 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1110 * This scenario occurs when the module is being removed
1111 * and all threads are being destroyed. skbs will continue
1112 * to be shifted from the CPU thread that is being removed
1113 * to the CPU thread associated with the CPU that is processing
1114 * the module removal. Once there is only one CPU Rx thread it
1115 * will reach this case and we will drop all skbs and later
1118 spin_lock_bh(&p->fcoe_rx_list.lock);
1119 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1121 spin_unlock_bh(&p->fcoe_rx_list.lock);
1125 * This a non-SMP scenario where the singular Rx thread is
1126 * being removed. Free all skbs and stop the thread.
1128 spin_lock_bh(&p->fcoe_rx_list.lock);
1129 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1131 spin_unlock_bh(&p->fcoe_rx_list.lock);
1135 kthread_stop(thread);
1142 * fcoe_cpu_callback() - Handler for CPU hotplug events
1143 * @nfb: The callback data block
1144 * @action: The event triggering the callback
1145 * @hcpu: The index of the CPU that the event is for
1147 * This creates or destroys per-CPU data for fcoe
1149 * Returns NOTIFY_OK always.
1151 static int fcoe_cpu_callback(struct notifier_block *nfb,
1152 unsigned long action, void *hcpu)
1154 unsigned cpu = (unsigned long)hcpu;
1158 case CPU_ONLINE_FROZEN:
1159 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1160 fcoe_percpu_thread_create(cpu);
1163 case CPU_DEAD_FROZEN:
1164 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1165 fcoe_percpu_thread_destroy(cpu);
1174 * fcoe_rcv() - Receive packets from a net device
1175 * @skb: The received packet
1176 * @netdev: The net device that the packet was received on
1177 * @ptype: The packet type context
1178 * @olddev: The last device net device
1180 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1181 * FC frame and passes the frame to libfc.
1183 * Returns: 0 for success
1185 int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1186 struct packet_type *ptype, struct net_device *olddev)
1188 struct fc_lport *lport;
1189 struct fcoe_rcv_info *fr;
1190 struct fcoe_interface *fcoe;
1191 struct fc_frame_header *fh;
1192 struct fcoe_percpu_s *fps;
1195 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1196 lport = fcoe->ctlr.lp;
1197 if (unlikely(!lport)) {
1198 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1201 if (!lport->link_up)
1204 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1205 "data:%p tail:%p end:%p sum:%d dev:%s",
1206 skb->len, skb->data_len, skb->head, skb->data,
1207 skb_tail_pointer(skb), skb_end_pointer(skb),
1208 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1210 /* check for FCOE packet type */
1211 if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
1212 FCOE_NETDEV_DBG(netdev, "Wrong FC type frame");
1217 * Check for minimum frame length, and make sure required FCoE
1218 * and FC headers are pulled into the linear data area.
1220 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1221 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1224 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1225 fh = (struct fc_frame_header *) skb_transport_header(skb);
1227 fr = fcoe_dev_from_skb(skb);
1232 * In case the incoming frame's exchange is originated from
1233 * the initiator, then received frame's exchange id is ANDed
1234 * with fc_cpu_mask bits to get the same cpu on which exchange
1235 * was originated, otherwise just use the current cpu.
1237 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1238 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1240 cpu = smp_processor_id();
1242 fps = &per_cpu(fcoe_percpu, cpu);
1243 spin_lock_bh(&fps->fcoe_rx_list.lock);
1244 if (unlikely(!fps->thread)) {
1246 * The targeted CPU is not ready, let's target
1247 * the first CPU now. For non-SMP systems this
1248 * will check the same CPU twice.
1250 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1251 "ready for incoming skb- using first online "
1254 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1255 cpu = first_cpu(cpu_online_map);
1256 fps = &per_cpu(fcoe_percpu, cpu);
1257 spin_lock_bh(&fps->fcoe_rx_list.lock);
1259 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1265 * We now have a valid CPU that we're targeting for
1266 * this skb. We also have this receive thread locked,
1267 * so we're free to queue skbs into it's queue.
1270 /* If this is a SCSI-FCP frame, and this is already executing on the
1271 * correct CPU, and the queue for this CPU is empty, then go ahead
1272 * and process the frame directly in the softirq context.
1273 * This lets us process completions without context switching from the
1274 * NET_RX softirq, to our receive processing thread, and then back to
1275 * BLOCK softirq context.
1277 if (fh->fh_type == FC_TYPE_FCP &&
1278 cpu == smp_processor_id() &&
1279 skb_queue_empty(&fps->fcoe_rx_list)) {
1280 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1281 fcoe_recv_frame(skb);
1283 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1284 if (fps->fcoe_rx_list.qlen == 1)
1285 wake_up_process(fps->thread);
1286 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1291 fc_lport_get_stats(lport)->ErrorFrames++;
1299 * fcoe_start_io() - Start FCoE I/O
1300 * @skb: The packet to be transmitted
1302 * This routine is called from the net device to start transmitting
1305 * Returns: 0 for success
1307 static inline int fcoe_start_io(struct sk_buff *skb)
1309 struct sk_buff *nskb;
1312 nskb = skb_clone(skb, GFP_ATOMIC);
1313 rc = dev_queue_xmit(nskb);
1321 * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1322 * @skb: The packet to be transmitted
1323 * @tlen: The total length of the trailer
1325 * This routine allocates a page for frame trailers. The page is re-used if
1326 * there is enough room left on it for the current trailer. If there isn't
1327 * enough buffer left a new page is allocated for the trailer. Reference to
1328 * the page from this function as well as the skbs using the page fragments
1329 * ensure that the page is freed at the appropriate time.
1331 * Returns: 0 for success
1333 static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
1335 struct fcoe_percpu_s *fps;
1338 fps = &get_cpu_var(fcoe_percpu);
1339 page = fps->crc_eof_page;
1341 page = alloc_page(GFP_ATOMIC);
1343 put_cpu_var(fcoe_percpu);
1346 fps->crc_eof_page = page;
1347 fps->crc_eof_offset = 0;
1351 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
1352 fps->crc_eof_offset, tlen);
1354 skb->data_len += tlen;
1355 skb->truesize += tlen;
1356 fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
1358 if (fps->crc_eof_offset >= PAGE_SIZE) {
1359 fps->crc_eof_page = NULL;
1360 fps->crc_eof_offset = 0;
1363 put_cpu_var(fcoe_percpu);
1368 * fcoe_fc_crc() - Calculates the CRC for a given frame
1369 * @fp: The frame to be checksumed
1371 * This uses crc32() routine to calculate the CRC for a frame
1373 * Return: The 32 bit CRC value
1375 u32 fcoe_fc_crc(struct fc_frame *fp)
1377 struct sk_buff *skb = fp_skb(fp);
1378 struct skb_frag_struct *frag;
1379 unsigned char *data;
1380 unsigned long off, len, clen;
1384 crc = crc32(~0, skb->data, skb_headlen(skb));
1386 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1387 frag = &skb_shinfo(skb)->frags[i];
1388 off = frag->page_offset;
1391 clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
1392 data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
1393 KM_SKB_DATA_SOFTIRQ);
1394 crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
1395 kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
1404 * fcoe_xmit() - Transmit a FCoE frame
1405 * @lport: The local port that the frame is to be transmitted for
1406 * @fp: The frame to be transmitted
1408 * Return: 0 for success
1410 int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1415 struct fcoe_crc_eof *cp;
1416 struct sk_buff *skb;
1417 struct fcoe_dev_stats *stats;
1418 struct fc_frame_header *fh;
1419 unsigned int hlen; /* header length implies the version */
1420 unsigned int tlen; /* trailer length */
1421 unsigned int elen; /* eth header, may include vlan */
1422 struct fcoe_port *port = lport_priv(lport);
1423 struct fcoe_interface *fcoe = port->fcoe;
1425 struct fcoe_hdr *hp;
1427 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1429 fh = fc_frame_header_get(fp);
1431 wlen = skb->len / FCOE_WORD_TO_BYTE;
1433 if (!lport->link_up) {
1438 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1439 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1445 elen = sizeof(struct ethhdr);
1446 hlen = sizeof(struct fcoe_hdr);
1447 tlen = sizeof(struct fcoe_crc_eof);
1448 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1451 if (likely(lport->crc_offload)) {
1452 skb->ip_summed = CHECKSUM_PARTIAL;
1453 skb->csum_start = skb_headroom(skb);
1454 skb->csum_offset = skb->len;
1457 skb->ip_summed = CHECKSUM_NONE;
1458 crc = fcoe_fc_crc(fp);
1461 /* copy port crc and eof to the skb buff */
1462 if (skb_is_nonlinear(skb)) {
1464 if (fcoe_get_paged_crc_eof(skb, tlen)) {
1468 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1469 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1470 + frag->page_offset;
1472 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1475 memset(cp, 0, sizeof(*cp));
1477 cp->fcoe_crc32 = cpu_to_le32(~crc);
1479 if (skb_is_nonlinear(skb)) {
1480 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1484 /* adjust skb network/transport offsets to match mac/fcoe/port */
1485 skb_push(skb, elen + hlen);
1486 skb_reset_mac_header(skb);
1487 skb_reset_network_header(skb);
1488 skb->mac_len = elen;
1489 skb->protocol = htons(ETH_P_FCOE);
1490 skb->dev = fcoe->netdev;
1492 /* fill up mac and fcoe headers */
1494 eh->h_proto = htons(ETH_P_FCOE);
1495 if (fcoe->ctlr.map_dest)
1496 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
1498 /* insert GW address */
1499 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1501 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1502 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1504 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1506 hp = (struct fcoe_hdr *)(eh + 1);
1507 memset(hp, 0, sizeof(*hp));
1509 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1512 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1513 if (lport->seq_offload && fr_max_payload(fp)) {
1514 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1515 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1517 skb_shinfo(skb)->gso_type = 0;
1518 skb_shinfo(skb)->gso_size = 0;
1520 /* update tx stats: regardless if LLD fails */
1521 stats = fc_lport_get_stats(lport);
1523 stats->TxWords += wlen;
1525 /* send down to lld */
1527 if (port->fcoe_pending_queue.qlen)
1528 fcoe_check_wait_queue(lport, skb);
1529 else if (fcoe_start_io(skb))
1530 fcoe_check_wait_queue(lport, skb);
1536 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1537 * @skb: The completed skb (argument required by destructor)
1539 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1541 complete(&fcoe_flush_completion);
1545 * fcoe_recv_frame() - process a single received frame
1546 * @skb: frame to process
1548 static void fcoe_recv_frame(struct sk_buff *skb)
1551 struct fc_lport *lport;
1552 struct fcoe_rcv_info *fr;
1553 struct fcoe_dev_stats *stats;
1554 struct fc_frame_header *fh;
1555 struct fcoe_crc_eof crc_eof;
1556 struct fc_frame *fp;
1558 struct fcoe_port *port;
1559 struct fcoe_hdr *hp;
1561 fr = fcoe_dev_from_skb(skb);
1563 if (unlikely(!lport)) {
1564 if (skb->destructor != fcoe_percpu_flush_done)
1565 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1570 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1571 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1572 skb->len, skb->data_len,
1573 skb->head, skb->data, skb_tail_pointer(skb),
1574 skb_end_pointer(skb), skb->csum,
1575 skb->dev ? skb->dev->name : "<NULL>");
1578 * Save source MAC address before discarding header.
1580 port = lport_priv(lport);
1581 if (skb_is_nonlinear(skb))
1582 skb_linearize(skb); /* not ideal */
1583 mac = eth_hdr(skb)->h_source;
1586 * Frame length checks and setting up the header pointers
1587 * was done in fcoe_rcv already.
1589 hp = (struct fcoe_hdr *) skb_network_header(skb);
1590 fh = (struct fc_frame_header *) skb_transport_header(skb);
1592 stats = fc_lport_get_stats(lport);
1593 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1594 if (stats->ErrorFrames < 5)
1595 printk(KERN_WARNING "fcoe: FCoE version "
1596 "mismatch: The frame has "
1597 "version %x, but the "
1598 "initiator supports version "
1599 "%x\n", FC_FCOE_DECAPS_VER(hp),
1601 stats->ErrorFrames++;
1606 skb_pull(skb, sizeof(struct fcoe_hdr));
1607 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1610 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1612 fp = (struct fc_frame *)skb;
1615 fr_sof(fp) = hp->fcoe_sof;
1617 /* Copy out the CRC and EOF trailer for access */
1618 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
1622 fr_eof(fp) = crc_eof.fcoe_eof;
1623 fr_crc(fp) = crc_eof.fcoe_crc32;
1624 if (pskb_trim(skb, fr_len)) {
1630 * We only check CRC if no offload is available and if it is
1631 * it's solicited data, in which case, the FCP layer would
1632 * check it during the copy.
1634 if (lport->crc_offload &&
1635 skb->ip_summed == CHECKSUM_UNNECESSARY)
1636 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1638 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1640 fh = fc_frame_header_get(fp);
1641 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
1642 fh->fh_type == FC_TYPE_FCP) {
1643 fc_exch_recv(lport, fp);
1646 if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
1647 if (le32_to_cpu(fr_crc(fp)) !=
1648 ~crc32(~0, skb->data, fr_len)) {
1649 if (stats->InvalidCRCCount < 5)
1650 printk(KERN_WARNING "fcoe: dropping "
1651 "frame with CRC error\n");
1652 stats->InvalidCRCCount++;
1653 stats->ErrorFrames++;
1657 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1659 fc_exch_recv(lport, fp);
1663 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1664 * @arg: The per-CPU context
1666 * Return: 0 for success
1668 int fcoe_percpu_receive_thread(void *arg)
1670 struct fcoe_percpu_s *p = arg;
1671 struct sk_buff *skb;
1673 set_user_nice(current, -20);
1675 while (!kthread_should_stop()) {
1677 spin_lock_bh(&p->fcoe_rx_list.lock);
1678 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1679 set_current_state(TASK_INTERRUPTIBLE);
1680 spin_unlock_bh(&p->fcoe_rx_list.lock);
1682 set_current_state(TASK_RUNNING);
1683 if (kthread_should_stop())
1685 spin_lock_bh(&p->fcoe_rx_list.lock);
1687 spin_unlock_bh(&p->fcoe_rx_list.lock);
1688 fcoe_recv_frame(skb);
1694 * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
1695 * @lport: The local port whose backlog is to be cleared
1697 * This empties the wait_queue, dequeues the head of the wait_queue queue
1698 * and calls fcoe_start_io() for each packet. If all skb have been
1699 * transmitted it returns the qlen. If an error occurs it restores
1700 * wait_queue (to try again later) and returns -1.
1702 * The wait_queue is used when the skb transmit fails. The failed skb
1703 * will go in the wait_queue which will be emptied by the timer function or
1704 * by the next skb transmit.
1706 static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
1708 struct fcoe_port *port = lport_priv(lport);
1711 spin_lock_bh(&port->fcoe_pending_queue.lock);
1714 __skb_queue_tail(&port->fcoe_pending_queue, skb);
1716 if (port->fcoe_pending_queue_active)
1718 port->fcoe_pending_queue_active = 1;
1720 while (port->fcoe_pending_queue.qlen) {
1721 /* keep qlen > 0 until fcoe_start_io succeeds */
1722 port->fcoe_pending_queue.qlen++;
1723 skb = __skb_dequeue(&port->fcoe_pending_queue);
1725 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1726 rc = fcoe_start_io(skb);
1727 spin_lock_bh(&port->fcoe_pending_queue.lock);
1730 __skb_queue_head(&port->fcoe_pending_queue, skb);
1731 /* undo temporary increment above */
1732 port->fcoe_pending_queue.qlen--;
1735 /* undo temporary increment above */
1736 port->fcoe_pending_queue.qlen--;
1739 if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
1741 if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
1742 mod_timer(&port->timer, jiffies + 2);
1743 port->fcoe_pending_queue_active = 0;
1745 if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
1747 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1752 * fcoe_dev_setup() - Setup the link change notification interface
1754 static void fcoe_dev_setup(void)
1756 register_netdevice_notifier(&fcoe_notifier);
1760 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1762 static void fcoe_dev_cleanup(void)
1764 unregister_netdevice_notifier(&fcoe_notifier);
1768 * fcoe_device_notification() - Handler for net device events
1769 * @notifier: The context of the notification
1770 * @event: The type of event
1771 * @ptr: The net device that the event was on
1773 * This function is called by the Ethernet driver in case of link change event.
1775 * Returns: 0 for success
1777 static int fcoe_device_notification(struct notifier_block *notifier,
1778 ulong event, void *ptr)
1780 struct fc_lport *lport = NULL;
1781 struct net_device *netdev = ptr;
1782 struct fcoe_interface *fcoe;
1783 struct fcoe_port *port;
1784 struct fcoe_dev_stats *stats;
1785 u32 link_possible = 1;
1789 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1790 if (fcoe->netdev == netdev) {
1791 lport = fcoe->ctlr.lp;
1802 case NETDEV_GOING_DOWN:
1808 case NETDEV_CHANGEMTU:
1809 if (netdev->features & NETIF_F_FCOE_MTU)
1811 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1812 sizeof(struct fcoe_crc_eof));
1813 if (mfs >= FC_MIN_MAX_FRAME)
1814 fc_set_mfs(lport, mfs);
1816 case NETDEV_REGISTER:
1818 case NETDEV_UNREGISTER:
1819 list_del(&fcoe->list);
1820 port = lport_priv(fcoe->ctlr.lp);
1821 fcoe_interface_cleanup(fcoe);
1822 schedule_work(&port->destroy_work);
1826 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1827 "from netdev netlink\n", event);
1829 if (link_possible && !fcoe_link_ok(lport))
1830 fcoe_ctlr_link_up(&fcoe->ctlr);
1831 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1832 stats = fc_lport_get_stats(lport);
1833 stats->LinkFailureCount++;
1834 fcoe_clean_pending_queue(lport);
1841 * fcoe_if_to_netdev() - Parse a name buffer to get a net device
1842 * @buffer: The name of the net device
1844 * Returns: NULL or a ptr to net_device
1846 static struct net_device *fcoe_if_to_netdev(const char *buffer)
1849 char ifname[IFNAMSIZ + 2];
1852 strlcpy(ifname, buffer, IFNAMSIZ);
1853 cp = ifname + strlen(ifname);
1854 while (--cp >= ifname && *cp == '\n')
1856 return dev_get_by_name(&init_net, ifname);
1862 * fcoe_destroy() - Destroy a FCoE interface
1863 * @buffer: The name of the Ethernet interface to be destroyed
1864 * @kp: The associated kernel parameter
1866 * Called from sysfs.
1868 * Returns: 0 for success
1870 static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
1872 struct fcoe_interface *fcoe;
1873 struct net_device *netdev;
1876 mutex_lock(&fcoe_config_mutex);
1877 #ifdef CONFIG_FCOE_MODULE
1879 * Make sure the module has been initialized, and is not about to be
1880 * removed. Module paramter sysfs files are writable before the
1881 * module_init function is called and after module_exit.
1883 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1889 netdev = fcoe_if_to_netdev(buffer);
1896 fcoe = fcoe_hostlist_lookup_port(netdev);
1902 list_del(&fcoe->list);
1903 fcoe_interface_cleanup(fcoe);
1905 fcoe_if_destroy(fcoe->ctlr.lp);
1909 mutex_unlock(&fcoe_config_mutex);
1914 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1915 * @work: Handle to the FCoE port to be destroyed
1917 static void fcoe_destroy_work(struct work_struct *work)
1919 struct fcoe_port *port;
1921 port = container_of(work, struct fcoe_port, destroy_work);
1922 mutex_lock(&fcoe_config_mutex);
1923 fcoe_if_destroy(port->lport);
1924 mutex_unlock(&fcoe_config_mutex);
1928 * fcoe_create() - Create a fcoe interface
1929 * @buffer: The name of the Ethernet interface to create on
1930 * @kp: The associated kernel param
1932 * Called from sysfs.
1934 * Returns: 0 for success
1936 static int fcoe_create(const char *buffer, struct kernel_param *kp)
1939 struct fcoe_interface *fcoe;
1940 struct fc_lport *lport;
1941 struct net_device *netdev;
1943 mutex_lock(&fcoe_config_mutex);
1944 #ifdef CONFIG_FCOE_MODULE
1946 * Make sure the module has been initialized, and is not about to be
1947 * removed. Module paramter sysfs files are writable before the
1948 * module_init function is called and after module_exit.
1950 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1957 netdev = fcoe_if_to_netdev(buffer);
1963 /* look for existing lport */
1964 if (fcoe_hostlist_lookup(netdev)) {
1969 fcoe = fcoe_interface_create(netdev);
1975 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
1976 if (IS_ERR(lport)) {
1977 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
1980 fcoe_interface_cleanup(fcoe);
1984 /* Make this the "master" N_Port */
1985 fcoe->ctlr.lp = lport;
1987 /* add to lports list */
1988 fcoe_hostlist_add(lport);
1990 /* start FIP Discovery and FLOGI */
1991 lport->boot_time = jiffies;
1992 fc_fabric_login(lport);
1993 if (!fcoe_link_ok(lport))
1994 fcoe_ctlr_link_up(&fcoe->ctlr);
1999 * Release from init in fcoe_interface_create(), on success lport
2000 * should be holding a reference taken in fcoe_if_create().
2002 fcoe_interface_put(fcoe);
2007 mutex_unlock(&fcoe_config_mutex);
2012 * fcoe_link_ok() - Check if the link is OK for a local port
2013 * @lport: The local port to check link on
2015 * Any permanently-disqualifying conditions have been previously checked.
2016 * This also updates the speed setting, which may change with link for 100/1000.
2018 * This function should probably be checking for PAUSE support at some point
2019 * in the future. Currently Per-priority-pause is not determinable using
2020 * ethtool, so we shouldn't be restrictive until that problem is resolved.
2022 * Returns: 0 if link is OK for use by FCoE.
2025 int fcoe_link_ok(struct fc_lport *lport)
2027 struct fcoe_port *port = lport_priv(lport);
2028 struct net_device *netdev = port->fcoe->netdev;
2029 struct ethtool_cmd ecmd = { ETHTOOL_GSET };
2031 if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) &&
2032 (!dev_ethtool_get_settings(netdev, &ecmd))) {
2033 lport->link_supported_speeds &=
2034 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
2035 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
2036 SUPPORTED_1000baseT_Full))
2037 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
2038 if (ecmd.supported & SUPPORTED_10000baseT_Full)
2039 lport->link_supported_speeds |=
2040 FC_PORTSPEED_10GBIT;
2041 if (ecmd.speed == SPEED_1000)
2042 lport->link_speed = FC_PORTSPEED_1GBIT;
2043 if (ecmd.speed == SPEED_10000)
2044 lport->link_speed = FC_PORTSPEED_10GBIT;
2052 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2053 * @lport: The local port whose skbs are to be cleared
2055 * Must be called with fcoe_create_mutex held to single-thread completion.
2057 * This flushes the pending skbs by adding a new skb to each queue and
2058 * waiting until they are all freed. This assures us that not only are
2059 * there no packets that will be handled by the lport, but also that any
2060 * threads already handling packet have returned.
2062 void fcoe_percpu_clean(struct fc_lport *lport)
2064 struct fcoe_percpu_s *pp;
2065 struct fcoe_rcv_info *fr;
2066 struct sk_buff_head *list;
2067 struct sk_buff *skb, *next;
2068 struct sk_buff *head;
2071 for_each_possible_cpu(cpu) {
2072 pp = &per_cpu(fcoe_percpu, cpu);
2073 spin_lock_bh(&pp->fcoe_rx_list.lock);
2074 list = &pp->fcoe_rx_list;
2076 for (skb = head; skb != (struct sk_buff *)list;
2079 fr = fcoe_dev_from_skb(skb);
2080 if (fr->fr_dev == lport) {
2081 __skb_unlink(skb, list);
2086 if (!pp->thread || !cpu_online(cpu)) {
2087 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2091 skb = dev_alloc_skb(0);
2093 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2096 skb->destructor = fcoe_percpu_flush_done;
2098 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2099 if (pp->fcoe_rx_list.qlen == 1)
2100 wake_up_process(pp->thread);
2101 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2103 wait_for_completion(&fcoe_flush_completion);
2108 * fcoe_clean_pending_queue() - Dequeue a skb and free it
2109 * @lport: The local port to dequeue a skb on
2111 void fcoe_clean_pending_queue(struct fc_lport *lport)
2113 struct fcoe_port *port = lport_priv(lport);
2114 struct sk_buff *skb;
2116 spin_lock_bh(&port->fcoe_pending_queue.lock);
2117 while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
2118 spin_unlock_bh(&port->fcoe_pending_queue.lock);
2120 spin_lock_bh(&port->fcoe_pending_queue.lock);
2122 spin_unlock_bh(&port->fcoe_pending_queue.lock);
2126 * fcoe_reset() - Reset a local port
2127 * @shost: The SCSI host associated with the local port to be reset
2129 * Returns: Always 0 (return value required by FC transport template)
2131 int fcoe_reset(struct Scsi_Host *shost)
2133 struct fc_lport *lport = shost_priv(shost);
2134 fc_lport_reset(lport);
2139 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2140 * @netdev: The net device used as a key
2142 * Locking: Must be called with the RNL mutex held.
2144 * Returns: NULL or the FCoE interface
2146 static struct fcoe_interface *
2147 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2149 struct fcoe_interface *fcoe;
2151 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2152 if (fcoe->netdev == netdev)
2159 * fcoe_hostlist_lookup() - Find the local port associated with a
2161 * @netdev: The netdevice used as a key
2163 * Locking: Must be called with the RTNL mutex held
2165 * Returns: NULL or the local port
2167 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2169 struct fcoe_interface *fcoe;
2171 fcoe = fcoe_hostlist_lookup_port(netdev);
2172 return (fcoe) ? fcoe->ctlr.lp : NULL;
2176 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2177 * port to the hostlist
2178 * @lport: The local port that identifies the FCoE interface to be added
2180 * Locking: must be called with the RTNL mutex held
2182 * Returns: 0 for success
2184 static int fcoe_hostlist_add(const struct fc_lport *lport)
2186 struct fcoe_interface *fcoe;
2187 struct fcoe_port *port;
2189 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2191 port = lport_priv(lport);
2193 list_add_tail(&fcoe->list, &fcoe_hostlist);
2199 * fcoe_init() - Initialize fcoe.ko
2201 * Returns: 0 on success, or a negative value on failure
2203 static int __init fcoe_init(void)
2205 struct fcoe_percpu_s *p;
2209 mutex_lock(&fcoe_config_mutex);
2211 for_each_possible_cpu(cpu) {
2212 p = &per_cpu(fcoe_percpu, cpu);
2213 skb_queue_head_init(&p->fcoe_rx_list);
2216 for_each_online_cpu(cpu)
2217 fcoe_percpu_thread_create(cpu);
2219 /* Initialize per CPU interrupt thread */
2220 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2224 /* Setup link change notification */
2227 rc = fcoe_if_init();
2231 mutex_unlock(&fcoe_config_mutex);
2235 for_each_online_cpu(cpu) {
2236 fcoe_percpu_thread_destroy(cpu);
2238 mutex_unlock(&fcoe_config_mutex);
2241 module_init(fcoe_init);
2244 * fcoe_exit() - Clean up fcoe.ko
2246 * Returns: 0 on success or a negative value on failure
2248 static void __exit fcoe_exit(void)
2250 struct fcoe_interface *fcoe, *tmp;
2251 struct fcoe_port *port;
2254 mutex_lock(&fcoe_config_mutex);
2258 /* releases the associated fcoe hosts */
2260 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2261 list_del(&fcoe->list);
2262 port = lport_priv(fcoe->ctlr.lp);
2263 fcoe_interface_cleanup(fcoe);
2264 schedule_work(&port->destroy_work);
2268 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2270 for_each_online_cpu(cpu)
2271 fcoe_percpu_thread_destroy(cpu);
2273 mutex_unlock(&fcoe_config_mutex);
2275 /* flush any asyncronous interface destroys,
2276 * this should happen after the netdev notifier is unregistered */
2277 flush_scheduled_work();
2278 /* That will flush out all the N_Ports on the hostlist, but now we
2279 * may have NPIV VN_Ports scheduled for destruction */
2280 flush_scheduled_work();
2282 /* detach from scsi transport
2283 * must happen after all destroys are done, therefor after the flush */
2286 module_exit(fcoe_exit);
2289 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2290 * @seq: active sequence in the FLOGI or FDISC exchange
2291 * @fp: response frame, or error encoded in a pointer (timeout)
2292 * @arg: pointer the the fcoe_ctlr structure
2294 * This handles MAC address managment for FCoE, then passes control on to
2295 * the libfc FLOGI response handler.
2297 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2299 struct fcoe_ctlr *fip = arg;
2300 struct fc_exch *exch = fc_seq_exch(seq);
2301 struct fc_lport *lport = exch->lp;
2307 mac = fr_cb(fp)->granted_mac;
2308 if (is_zero_ether_addr(mac)) {
2310 if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
2315 fcoe_update_src_mac(lport, mac);
2317 fc_lport_flogi_resp(seq, fp, lport);
2321 * fcoe_logo_resp() - FCoE specific LOGO response handler
2322 * @seq: active sequence in the LOGO exchange
2323 * @fp: response frame, or error encoded in a pointer (timeout)
2324 * @arg: pointer the the fcoe_ctlr structure
2326 * This handles MAC address managment for FCoE, then passes control on to
2327 * the libfc LOGO response handler.
2329 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2331 struct fc_lport *lport = arg;
2332 static u8 zero_mac[ETH_ALEN] = { 0 };
2335 fcoe_update_src_mac(lport, zero_mac);
2336 fc_lport_logo_resp(seq, fp, lport);
2340 * fcoe_elsct_send - FCoE specific ELS handler
2342 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2343 * using FCoE specific response handlers and passing the FIP controller as
2344 * the argument (the lport is still available from the exchange).
2346 * Most of the work here is just handed off to the libfc routine.
2348 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2349 struct fc_frame *fp, unsigned int op,
2350 void (*resp)(struct fc_seq *,
2353 void *arg, u32 timeout)
2355 struct fcoe_port *port = lport_priv(lport);
2356 struct fcoe_interface *fcoe = port->fcoe;
2357 struct fcoe_ctlr *fip = &fcoe->ctlr;
2358 struct fc_frame_header *fh = fc_frame_header_get(fp);
2363 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2366 /* only hook onto fabric logouts, not port logouts */
2367 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2369 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2372 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2376 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2377 * @vport: fc_vport object to create a new fc_host for
2378 * @disabled: start the new fc_host in a disabled state by default?
2380 * Returns: 0 for success
2382 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2384 struct Scsi_Host *shost = vport_to_shost(vport);
2385 struct fc_lport *n_port = shost_priv(shost);
2386 struct fcoe_port *port = lport_priv(n_port);
2387 struct fcoe_interface *fcoe = port->fcoe;
2388 struct net_device *netdev = fcoe->netdev;
2389 struct fc_lport *vn_port;
2391 mutex_lock(&fcoe_config_mutex);
2392 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2393 mutex_unlock(&fcoe_config_mutex);
2395 if (IS_ERR(vn_port)) {
2396 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2402 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2404 vn_port->boot_time = jiffies;
2405 fc_fabric_login(vn_port);
2406 fc_vport_setlink(vn_port);
2412 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2413 * @vport: fc_vport object that is being destroyed
2415 * Returns: 0 for success
2417 static int fcoe_vport_destroy(struct fc_vport *vport)
2419 struct Scsi_Host *shost = vport_to_shost(vport);
2420 struct fc_lport *n_port = shost_priv(shost);
2421 struct fc_lport *vn_port = vport->dd_data;
2422 struct fcoe_port *port = lport_priv(vn_port);
2424 mutex_lock(&n_port->lp_mutex);
2425 list_del(&vn_port->list);
2426 mutex_unlock(&n_port->lp_mutex);
2427 schedule_work(&port->destroy_work);
2432 * fcoe_vport_disable() - change vport state
2433 * @vport: vport to bring online/offline
2434 * @disable: should the vport be disabled?
2436 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2438 struct fc_lport *lport = vport->dd_data;
2441 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2442 fc_fabric_logoff(lport);
2444 lport->boot_time = jiffies;
2445 fc_fabric_login(lport);
2446 fc_vport_setlink(lport);
2453 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2454 * @vport: fc_vport with a new symbolic name string
2456 * After generating a new symbolic name string, a new RSPN_ID request is
2457 * sent to the name server. There is no response handler, so if it fails
2458 * for some reason it will not be retried.
2460 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2462 struct fc_lport *lport = vport->dd_data;
2463 struct fc_frame *fp;
2466 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2467 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2468 fcoe_netdev(lport)->name, vport->symbolic_name);
2470 if (lport->state != LPORT_ST_READY)
2473 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2474 fp = fc_frame_alloc(lport,
2475 sizeof(struct fc_ct_hdr) +
2476 sizeof(struct fc_ns_rspn) + len);
2479 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2480 NULL, NULL, 3 * lport->r_a_tov);
2484 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2485 * @lport: the local port
2486 * @fc_lesb: the link error status block
2488 static void fcoe_get_lesb(struct fc_lport *lport,
2489 struct fc_els_lesb *fc_lesb)
2492 u32 lfc, vlfc, mdac;
2493 struct fcoe_dev_stats *devst;
2494 struct fcoe_fc_els_lesb *lesb;
2495 struct net_device *netdev = fcoe_netdev(lport);
2500 lesb = (struct fcoe_fc_els_lesb *)fc_lesb;
2501 memset(lesb, 0, sizeof(*lesb));
2502 for_each_possible_cpu(cpu) {
2503 devst = per_cpu_ptr(lport->dev_stats, cpu);
2504 lfc += devst->LinkFailureCount;
2505 vlfc += devst->VLinkFailureCount;
2506 mdac += devst->MissDiscAdvCount;
2508 lesb->lesb_link_fail = htonl(lfc);
2509 lesb->lesb_vlink_fail = htonl(vlfc);
2510 lesb->lesb_miss_fka = htonl(mdac);
2511 lesb->lesb_fcs_error = htonl(dev_get_stats(netdev)->rx_crc_errors);