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/spinlock.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/if_ether.h>
26 #include <linux/if_vlan.h>
27 #include <linux/crc32.h>
28 #include <linux/slab.h>
29 #include <linux/cpu.h>
31 #include <linux/sysfs.h>
32 #include <linux/ctype.h>
33 #include <linux/workqueue.h>
34 #include <net/dcbnl.h>
35 #include <net/dcbevent.h>
36 #include <scsi/scsi_tcq.h>
37 #include <scsi/scsicam.h>
38 #include <scsi/scsi_transport.h>
39 #include <scsi/scsi_transport_fc.h>
40 #include <net/rtnetlink.h>
42 #include <scsi/fc/fc_encaps.h>
43 #include <scsi/fc/fc_fip.h>
44 #include <scsi/fc/fc_fcoe.h>
46 #include <scsi/libfc.h>
47 #include <scsi/fc_frame.h>
48 #include <scsi/libfcoe.h>
52 MODULE_AUTHOR("Open-FCoE.org");
53 MODULE_DESCRIPTION("FCoE");
54 MODULE_LICENSE("GPL v2");
56 /* Performance tuning parameters for fcoe */
57 static unsigned int fcoe_ddp_min = 4096;
58 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
59 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
60 "Direct Data Placement (DDP).");
62 unsigned int fcoe_debug_logging;
63 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
64 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
66 static DEFINE_MUTEX(fcoe_config_mutex);
68 static struct workqueue_struct *fcoe_wq;
71 /* must only by accessed under the RTNL mutex */
72 static LIST_HEAD(fcoe_hostlist);
73 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
75 /* Function Prototypes */
76 static int fcoe_reset(struct Scsi_Host *);
77 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
78 static int fcoe_rcv(struct sk_buff *, struct net_device *,
79 struct packet_type *, struct net_device *);
80 static void fcoe_percpu_clean(struct fc_lport *);
81 static int fcoe_link_ok(struct fc_lport *);
83 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
84 static int fcoe_hostlist_add(const struct fc_lport *);
85 static void fcoe_hostlist_del(const struct fc_lport *);
87 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
88 static void fcoe_dev_setup(void);
89 static void fcoe_dev_cleanup(void);
90 static struct fcoe_interface
91 *fcoe_hostlist_lookup_port(const struct net_device *);
93 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
94 struct packet_type *, struct net_device *);
96 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
97 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
98 static u8 *fcoe_get_src_mac(struct fc_lport *);
99 static void fcoe_destroy_work(struct work_struct *);
101 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
103 static int fcoe_ddp_done(struct fc_lport *, u16);
104 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
106 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
107 ulong event, void *ptr);
109 static bool fcoe_match(struct net_device *netdev);
110 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode);
111 static int fcoe_destroy(struct net_device *netdev);
112 static int fcoe_enable(struct net_device *netdev);
113 static int fcoe_disable(struct net_device *netdev);
115 /* fcoe_syfs control interface handlers */
116 static int fcoe_ctlr_alloc(struct net_device *netdev);
117 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
120 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
121 u32 did, struct fc_frame *,
123 void (*resp)(struct fc_seq *,
126 void *, u32 timeout);
127 static void fcoe_recv_frame(struct sk_buff *skb);
129 /* notification function for packets from net device */
130 static struct notifier_block fcoe_notifier = {
131 .notifier_call = fcoe_device_notification,
134 /* notification function for DCB events */
135 static struct notifier_block dcb_notifier = {
136 .notifier_call = fcoe_dcb_app_notification,
139 static struct scsi_transport_template *fcoe_nport_scsi_transport;
140 static struct scsi_transport_template *fcoe_vport_scsi_transport;
142 static int fcoe_vport_destroy(struct fc_vport *);
143 static int fcoe_vport_create(struct fc_vport *, bool disabled);
144 static int fcoe_vport_disable(struct fc_vport *, bool disable);
145 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
146 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
147 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
149 static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
150 .set_fcoe_ctlr_mode = fcoe_ctlr_set_fip_mode,
151 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
152 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
153 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
154 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
155 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
156 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
157 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
159 .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
160 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
163 static struct libfc_function_template fcoe_libfc_fcn_templ = {
164 .frame_send = fcoe_xmit,
165 .ddp_setup = fcoe_ddp_setup,
166 .ddp_done = fcoe_ddp_done,
167 .ddp_target = fcoe_ddp_target,
168 .elsct_send = fcoe_elsct_send,
169 .get_lesb = fcoe_get_lesb,
170 .lport_set_port_id = fcoe_set_port_id,
173 static struct fc_function_template fcoe_nport_fc_functions = {
174 .show_host_node_name = 1,
175 .show_host_port_name = 1,
176 .show_host_supported_classes = 1,
177 .show_host_supported_fc4s = 1,
178 .show_host_active_fc4s = 1,
179 .show_host_maxframe_size = 1,
180 .show_host_serial_number = 1,
181 .show_host_manufacturer = 1,
182 .show_host_model = 1,
183 .show_host_model_description = 1,
184 .show_host_hardware_version = 1,
185 .show_host_driver_version = 1,
186 .show_host_firmware_version = 1,
187 .show_host_optionrom_version = 1,
189 .show_host_port_id = 1,
190 .show_host_supported_speeds = 1,
191 .get_host_speed = fc_get_host_speed,
192 .show_host_speed = 1,
193 .show_host_port_type = 1,
194 .get_host_port_state = fc_get_host_port_state,
195 .show_host_port_state = 1,
196 .show_host_symbolic_name = 1,
198 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
199 .show_rport_maxframe_size = 1,
200 .show_rport_supported_classes = 1,
202 .show_host_fabric_name = 1,
203 .show_starget_node_name = 1,
204 .show_starget_port_name = 1,
205 .show_starget_port_id = 1,
206 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
207 .show_rport_dev_loss_tmo = 1,
208 .get_fc_host_stats = fc_get_host_stats,
209 .issue_fc_host_lip = fcoe_reset,
211 .terminate_rport_io = fc_rport_terminate_io,
213 .vport_create = fcoe_vport_create,
214 .vport_delete = fcoe_vport_destroy,
215 .vport_disable = fcoe_vport_disable,
216 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
218 .bsg_request = fc_lport_bsg_request,
221 static struct fc_function_template fcoe_vport_fc_functions = {
222 .show_host_node_name = 1,
223 .show_host_port_name = 1,
224 .show_host_supported_classes = 1,
225 .show_host_supported_fc4s = 1,
226 .show_host_active_fc4s = 1,
227 .show_host_maxframe_size = 1,
228 .show_host_serial_number = 1,
229 .show_host_manufacturer = 1,
230 .show_host_model = 1,
231 .show_host_model_description = 1,
232 .show_host_hardware_version = 1,
233 .show_host_driver_version = 1,
234 .show_host_firmware_version = 1,
235 .show_host_optionrom_version = 1,
237 .show_host_port_id = 1,
238 .show_host_supported_speeds = 1,
239 .get_host_speed = fc_get_host_speed,
240 .show_host_speed = 1,
241 .show_host_port_type = 1,
242 .get_host_port_state = fc_get_host_port_state,
243 .show_host_port_state = 1,
244 .show_host_symbolic_name = 1,
246 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
247 .show_rport_maxframe_size = 1,
248 .show_rport_supported_classes = 1,
250 .show_host_fabric_name = 1,
251 .show_starget_node_name = 1,
252 .show_starget_port_name = 1,
253 .show_starget_port_id = 1,
254 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
255 .show_rport_dev_loss_tmo = 1,
256 .get_fc_host_stats = fc_get_host_stats,
257 .issue_fc_host_lip = fcoe_reset,
259 .terminate_rport_io = fc_rport_terminate_io,
261 .bsg_request = fc_lport_bsg_request,
264 static struct scsi_host_template fcoe_shost_template = {
265 .module = THIS_MODULE,
266 .name = "FCoE Driver",
267 .proc_name = FCOE_NAME,
268 .queuecommand = fc_queuecommand,
269 .eh_abort_handler = fc_eh_abort,
270 .eh_device_reset_handler = fc_eh_device_reset,
271 .eh_host_reset_handler = fc_eh_host_reset,
272 .slave_alloc = fc_slave_alloc,
273 .change_queue_depth = scsi_change_queue_depth,
276 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
277 .use_clustering = ENABLE_CLUSTERING,
278 .sg_tablesize = SG_ALL,
279 .max_sectors = 0xffff,
280 .track_queue_depth = 1,
284 * fcoe_interface_setup() - Setup a FCoE interface
285 * @fcoe: The new FCoE interface
286 * @netdev: The net device that the fcoe interface is on
288 * Returns : 0 for success
289 * Locking: must be called with the RTNL mutex held
291 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
292 struct net_device *netdev)
294 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
295 struct netdev_hw_addr *ha;
296 struct net_device *real_dev;
297 u8 flogi_maddr[ETH_ALEN];
298 const struct net_device_ops *ops;
300 fcoe->netdev = netdev;
302 /* Let LLD initialize for FCoE */
303 ops = netdev->netdev_ops;
304 if (ops->ndo_fcoe_enable) {
305 if (ops->ndo_fcoe_enable(netdev))
306 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
307 " specific feature for LLD.\n");
310 /* Do not support for bonding device */
311 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
312 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
316 /* look for SAN MAC address, if multiple SAN MACs exist, only
317 * use the first one for SPMA */
318 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
319 vlan_dev_real_dev(netdev) : netdev;
320 fcoe->realdev = real_dev;
322 for_each_dev_addr(real_dev, ha) {
323 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
324 (is_valid_ether_addr(ha->addr))) {
325 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
332 /* setup Source Mac Address */
334 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
337 * Add FCoE MAC address as second unicast MAC address
338 * or enter promiscuous mode if not capable of listening
339 * for multiple unicast MACs.
341 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
342 dev_uc_add(netdev, flogi_maddr);
344 dev_uc_add(netdev, fip->ctl_src_addr);
345 if (fip->mode == FIP_MODE_VN2VN) {
346 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
347 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
349 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
352 * setup the receive function from ethernet driver
353 * on the ethertype for the given device
355 fcoe->fcoe_packet_type.func = fcoe_rcv;
356 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);
357 fcoe->fcoe_packet_type.dev = netdev;
358 dev_add_pack(&fcoe->fcoe_packet_type);
360 fcoe->fip_packet_type.func = fcoe_fip_recv;
361 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
362 fcoe->fip_packet_type.dev = netdev;
363 dev_add_pack(&fcoe->fip_packet_type);
369 * fcoe_interface_create() - Create a FCoE interface on a net device
370 * @netdev: The net device to create the FCoE interface on
371 * @fip_mode: The mode to use for FIP
373 * Returns: pointer to a struct fcoe_interface or NULL on error
375 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
376 enum fip_state fip_mode)
378 struct fcoe_ctlr_device *ctlr_dev;
379 struct fcoe_ctlr *ctlr;
380 struct fcoe_interface *fcoe;
384 if (!try_module_get(THIS_MODULE)) {
385 FCOE_NETDEV_DBG(netdev,
386 "Could not get a reference to the module\n");
387 fcoe = ERR_PTR(-EBUSY);
391 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
392 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
395 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
396 fcoe = ERR_PTR(-ENOMEM);
400 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
401 ctlr->cdev = ctlr_dev;
402 fcoe = fcoe_ctlr_priv(ctlr);
409 fcoe_ctlr_init(ctlr, fip_mode);
410 ctlr->send = fcoe_fip_send;
411 ctlr->update_mac = fcoe_update_src_mac;
412 ctlr->get_src_addr = fcoe_get_src_mac;
414 err = fcoe_interface_setup(fcoe, netdev);
416 fcoe_ctlr_destroy(ctlr);
417 fcoe_ctlr_device_delete(ctlr_dev);
426 module_put(THIS_MODULE);
432 * fcoe_interface_remove() - remove FCoE interface from netdev
433 * @fcoe: The FCoE interface to be cleaned up
435 * Caller must be holding the RTNL mutex
437 static void fcoe_interface_remove(struct fcoe_interface *fcoe)
439 struct net_device *netdev = fcoe->netdev;
440 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
441 u8 flogi_maddr[ETH_ALEN];
442 const struct net_device_ops *ops;
445 * Don't listen for Ethernet packets anymore.
446 * synchronize_net() ensures that the packet handlers are not running
447 * on another CPU. dev_remove_pack() would do that, this calls the
448 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
450 __dev_remove_pack(&fcoe->fcoe_packet_type);
451 __dev_remove_pack(&fcoe->fip_packet_type);
454 /* Delete secondary MAC addresses */
455 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
456 dev_uc_del(netdev, flogi_maddr);
458 dev_uc_del(netdev, fip->ctl_src_addr);
459 if (fip->mode == FIP_MODE_VN2VN) {
460 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
461 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
463 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
465 /* Tell the LLD we are done w/ FCoE */
466 ops = netdev->netdev_ops;
467 if (ops->ndo_fcoe_disable) {
468 if (ops->ndo_fcoe_disable(netdev))
469 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
470 " specific feature for LLD.\n");
477 * fcoe_interface_cleanup() - Clean up a FCoE interface
478 * @fcoe: The FCoE interface to be cleaned up
480 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
482 struct net_device *netdev = fcoe->netdev;
483 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
487 fcoe_interface_remove(fcoe);
490 /* Release the self-reference taken during fcoe_interface_create() */
491 /* tear-down the FCoE controller */
492 fcoe_ctlr_destroy(fip);
493 scsi_host_put(fip->lp->host);
495 module_put(THIS_MODULE);
499 * fcoe_fip_recv() - Handler for received FIP frames
500 * @skb: The receive skb
501 * @netdev: The associated net device
502 * @ptype: The packet_type structure which was used to register this handler
503 * @orig_dev: The original net_device the the skb was received on.
504 * (in case dev is a bond)
506 * Returns: 0 for success
508 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
509 struct packet_type *ptype,
510 struct net_device *orig_dev)
512 struct fcoe_interface *fcoe;
513 struct fcoe_ctlr *ctlr;
515 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
516 ctlr = fcoe_to_ctlr(fcoe);
517 fcoe_ctlr_recv(ctlr, skb);
522 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
523 * @port: The FCoE port
524 * @skb: The FIP/FCoE packet to be sent
526 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
528 if (port->fcoe_pending_queue.qlen)
529 fcoe_check_wait_queue(port->lport, skb);
530 else if (fcoe_start_io(skb))
531 fcoe_check_wait_queue(port->lport, skb);
535 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
536 * @fip: The FCoE controller
537 * @skb: The FIP packet to be sent
539 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
541 skb->dev = fcoe_from_ctlr(fip)->netdev;
542 fcoe_port_send(lport_priv(fip->lp), skb);
546 * fcoe_update_src_mac() - Update the Ethernet MAC filters
547 * @lport: The local port to update the source MAC on
548 * @addr: Unicast MAC address to add
550 * Remove any previously-set unicast MAC filter.
551 * Add secondary FCoE MAC address filter for our OUI.
553 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
555 struct fcoe_port *port = lport_priv(lport);
556 struct fcoe_interface *fcoe = port->priv;
558 if (!is_zero_ether_addr(port->data_src_addr))
559 dev_uc_del(fcoe->netdev, port->data_src_addr);
560 if (!is_zero_ether_addr(addr))
561 dev_uc_add(fcoe->netdev, addr);
562 memcpy(port->data_src_addr, addr, ETH_ALEN);
566 * fcoe_get_src_mac() - return the Ethernet source address for an lport
567 * @lport: libfc lport
569 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
571 struct fcoe_port *port = lport_priv(lport);
573 return port->data_src_addr;
577 * fcoe_lport_config() - Set up a local port
578 * @lport: The local port to be setup
580 * Returns: 0 for success
582 static int fcoe_lport_config(struct fc_lport *lport)
586 lport->max_retry_count = 3;
587 lport->max_rport_retry_count = 3;
588 lport->e_d_tov = 2 * 1000; /* FC-FS default */
589 lport->r_a_tov = 2 * 2 * 1000;
590 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
591 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
592 lport->does_npiv = 1;
594 fc_lport_init_stats(lport);
596 /* lport fc_lport related configuration */
597 fc_lport_config(lport);
599 /* offload related configuration */
600 lport->crc_offload = 0;
601 lport->seq_offload = 0;
602 lport->lro_enabled = 0;
610 * fcoe_netdev_features_change - Updates the lport's offload flags based
611 * on the LLD netdev's FCoE feature flags
613 static void fcoe_netdev_features_change(struct fc_lport *lport,
614 struct net_device *netdev)
616 mutex_lock(&lport->lp_mutex);
618 if (netdev->features & NETIF_F_SG)
623 if (netdev->features & NETIF_F_FCOE_CRC) {
624 lport->crc_offload = 1;
625 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
627 lport->crc_offload = 0;
630 if (netdev->features & NETIF_F_FSO) {
631 lport->seq_offload = 1;
632 lport->lso_max = netdev->gso_max_size;
633 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
636 lport->seq_offload = 0;
640 if (netdev->fcoe_ddp_xid) {
641 lport->lro_enabled = 1;
642 lport->lro_xid = netdev->fcoe_ddp_xid;
643 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
646 lport->lro_enabled = 0;
650 mutex_unlock(&lport->lp_mutex);
654 * fcoe_netdev_config() - Set up net devive for SW FCoE
655 * @lport: The local port that is associated with the net device
656 * @netdev: The associated net device
658 * Must be called after fcoe_lport_config() as it will use local port mutex
660 * Returns: 0 for success
662 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
666 struct fcoe_interface *fcoe;
667 struct fcoe_ctlr *ctlr;
668 struct fcoe_port *port;
670 /* Setup lport private data to point to fcoe softc */
671 port = lport_priv(lport);
673 ctlr = fcoe_to_ctlr(fcoe);
676 * Determine max frame size based on underlying device and optional
677 * user-configured limit. If the MFS is too low, fcoe_link_ok()
678 * will return 0, so do this first.
681 if (netdev->features & NETIF_F_FCOE_MTU) {
683 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
685 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
686 if (fc_set_mfs(lport, mfs))
689 /* offload features support */
690 fcoe_netdev_features_change(lport, netdev);
692 skb_queue_head_init(&port->fcoe_pending_queue);
693 port->fcoe_pending_queue_active = 0;
694 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
696 fcoe_link_speed_update(lport);
699 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
700 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
701 fc_set_wwnn(lport, wwnn);
702 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
703 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
705 fc_set_wwpn(lport, wwpn);
712 * fcoe_shost_config() - Set up the SCSI host associated with a local port
713 * @lport: The local port
714 * @dev: The device associated with the SCSI host
716 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
718 * Returns: 0 for success
720 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
724 /* lport scsi host config */
725 lport->host->max_lun = FCOE_MAX_LUN;
726 lport->host->max_id = FCOE_MAX_FCP_TARGET;
727 lport->host->max_channel = 0;
728 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
731 lport->host->transportt = fcoe_vport_scsi_transport;
733 lport->host->transportt = fcoe_nport_scsi_transport;
735 /* add the new host to the SCSI-ml */
736 rc = scsi_add_host(lport->host, dev);
738 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
739 "error on scsi_add_host\n");
744 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
746 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
747 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
748 fcoe_netdev(lport)->name);
755 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
756 * @lport: The local port that is associated with the net device
757 * @netdev: The associated net device
759 * Must be called after fcoe_shost_config() as it will use local port mutex
762 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
764 struct fcoe_interface *fcoe;
765 struct fcoe_port *port;
766 struct net_device *realdev;
769 port = lport_priv(lport);
771 realdev = fcoe->realdev;
776 /* No FDMI state m/c for NPIV ports */
780 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
781 struct netdev_fcoe_hbainfo *fdmi;
782 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
786 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
789 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
790 "information from netdev.\n");
794 snprintf(fc_host_serial_number(lport->host),
795 FC_SERIAL_NUMBER_SIZE,
797 fdmi->serial_number);
798 snprintf(fc_host_manufacturer(lport->host),
799 FC_SERIAL_NUMBER_SIZE,
802 snprintf(fc_host_model(lport->host),
803 FC_SYMBOLIC_NAME_SIZE,
806 snprintf(fc_host_model_description(lport->host),
807 FC_SYMBOLIC_NAME_SIZE,
809 fdmi->model_description);
810 snprintf(fc_host_hardware_version(lport->host),
811 FC_VERSION_STRING_SIZE,
813 fdmi->hardware_version);
814 snprintf(fc_host_driver_version(lport->host),
815 FC_VERSION_STRING_SIZE,
817 fdmi->driver_version);
818 snprintf(fc_host_optionrom_version(lport->host),
819 FC_VERSION_STRING_SIZE,
821 fdmi->optionrom_version);
822 snprintf(fc_host_firmware_version(lport->host),
823 FC_VERSION_STRING_SIZE,
825 fdmi->firmware_version);
827 /* Enable FDMI lport states */
828 lport->fdmi_enabled = 1;
831 lport->fdmi_enabled = 0;
832 printk(KERN_INFO "fcoe: No FDMI support.\n");
837 * fcoe_oem_match() - The match routine for the offloaded exchange manager
840 * This routine will be associated with an exchange manager (EM). When
841 * the libfc exchange handling code is looking for an EM to use it will
842 * call this routine and pass it the frame that it wishes to send. This
843 * routine will return True if the associated EM is to be used and False
844 * if the echange code should continue looking for an EM.
846 * The offload EM that this routine is associated with will handle any
847 * packets that are for SCSI read requests.
849 * This has been enhanced to work when FCoE stack is operating in target
852 * Returns: True for read types I/O, otherwise returns false.
854 static bool fcoe_oem_match(struct fc_frame *fp)
856 struct fc_frame_header *fh = fc_frame_header_get(fp);
857 struct fcp_cmnd *fcp;
859 if (fc_fcp_is_read(fr_fsp(fp)) &&
860 (fr_fsp(fp)->data_len > fcoe_ddp_min))
862 else if ((fr_fsp(fp) == NULL) &&
863 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
864 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
865 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
866 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
867 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
874 * fcoe_em_config() - Allocate and configure an exchange manager
875 * @lport: The local port that the new EM will be associated with
877 * Returns: 0 on success
879 static inline int fcoe_em_config(struct fc_lport *lport)
881 struct fcoe_port *port = lport_priv(lport);
882 struct fcoe_interface *fcoe = port->priv;
883 struct fcoe_interface *oldfcoe = NULL;
884 struct net_device *old_real_dev, *cur_real_dev;
885 u16 min_xid = FCOE_MIN_XID;
886 u16 max_xid = FCOE_MAX_XID;
889 * Check if need to allocate an em instance for
890 * offload exchange ids to be shared across all VN_PORTs/lport.
892 if (!lport->lro_enabled || !lport->lro_xid ||
893 (lport->lro_xid >= max_xid)) {
899 * Reuse existing offload em instance in case
900 * it is already allocated on real eth device
902 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
903 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
905 cur_real_dev = fcoe->netdev;
907 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
908 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
909 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
911 old_real_dev = oldfcoe->netdev;
913 if (cur_real_dev == old_real_dev) {
914 fcoe->oem = oldfcoe->oem;
920 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
921 printk(KERN_ERR "fcoe_em_config: failed to add "
922 "offload em:%p on interface:%s\n",
923 fcoe->oem, fcoe->netdev->name);
927 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
928 FCOE_MIN_XID, lport->lro_xid,
931 printk(KERN_ERR "fcoe_em_config: failed to allocate "
932 "em for offload exches on interface:%s\n",
939 * Exclude offload EM xid range from next EM xid range.
941 min_xid += lport->lro_xid + 1;
944 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
945 printk(KERN_ERR "fcoe_em_config: failed to "
946 "allocate em on interface %s\n", fcoe->netdev->name);
954 * fcoe_if_destroy() - Tear down a SW FCoE instance
955 * @lport: The local port to be destroyed
958 static void fcoe_if_destroy(struct fc_lport *lport)
960 struct fcoe_port *port = lport_priv(lport);
961 struct fcoe_interface *fcoe = port->priv;
962 struct net_device *netdev = fcoe->netdev;
964 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
966 /* Logout of the fabric */
967 fc_fabric_logoff(lport);
969 /* Cleanup the fc_lport */
970 fc_lport_destroy(lport);
972 /* Stop the transmit retry timer */
973 del_timer_sync(&port->timer);
975 /* Free existing transmit skbs */
976 fcoe_clean_pending_queue(lport);
979 if (!is_zero_ether_addr(port->data_src_addr))
980 dev_uc_del(netdev, port->data_src_addr);
984 fcoe_interface_remove(fcoe);
987 /* Free queued packets for the per-CPU receive threads */
988 fcoe_percpu_clean(lport);
990 /* Detach from the scsi-ml */
991 fc_remove_host(lport->host);
992 scsi_remove_host(lport->host);
994 /* Destroy lport scsi_priv */
995 fc_fcp_destroy(lport);
997 /* There are no more rports or I/O, free the EM */
998 fc_exch_mgr_free(lport);
1000 /* Free memory used by statistical counters */
1001 fc_lport_free_stats(lport);
1004 * Release the Scsi_Host for vport but hold on to
1005 * master lport until it fcoe interface fully cleaned-up.
1008 scsi_host_put(lport->host);
1012 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1013 * @lport: The local port to setup DDP for
1014 * @xid: The exchange ID for this DDP transfer
1015 * @sgl: The scatterlist describing this transfer
1016 * @sgc: The number of sg items
1018 * Returns: 0 if the DDP context was not configured
1020 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1021 struct scatterlist *sgl, unsigned int sgc)
1023 struct net_device *netdev = fcoe_netdev(lport);
1025 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1026 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1034 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1035 * @lport: The local port to setup DDP for
1036 * @xid: The exchange ID for this DDP transfer
1037 * @sgl: The scatterlist describing this transfer
1038 * @sgc: The number of sg items
1040 * Returns: 0 if the DDP context was not configured
1042 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1043 struct scatterlist *sgl, unsigned int sgc)
1045 struct net_device *netdev = fcoe_netdev(lport);
1047 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1048 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1056 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1057 * @lport: The local port to complete DDP on
1058 * @xid: The exchange ID for this DDP transfer
1060 * Returns: the length of data that have been completed by DDP
1062 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1064 struct net_device *netdev = fcoe_netdev(lport);
1066 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1067 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1072 * fcoe_if_create() - Create a FCoE instance on an interface
1073 * @fcoe: The FCoE interface to create a local port on
1074 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1075 * @npiv: Indicates if the port is a vport or not
1077 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1079 * Returns: The allocated fc_lport or an error pointer
1081 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1082 struct device *parent, int npiv)
1084 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1085 struct net_device *netdev = fcoe->netdev;
1086 struct fc_lport *lport, *n_port;
1087 struct fcoe_port *port;
1088 struct Scsi_Host *shost;
1091 * parent is only a vport if npiv is 1,
1092 * but we'll only use vport in that case so go ahead and set it
1094 struct fc_vport *vport = dev_to_vport(parent);
1096 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1099 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1101 lport = libfc_vport_create(vport, sizeof(*port));
1104 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1108 port = lport_priv(lport);
1109 port->lport = lport;
1111 port->get_netdev = fcoe_netdev;
1112 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1113 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1114 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1117 * Need to add the lport to the hostlist
1118 * so we catch NETDEV_CHANGE events.
1120 fcoe_hostlist_add(lport);
1122 /* configure a fc_lport including the exchange manager */
1123 rc = fcoe_lport_config(lport);
1125 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1131 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1132 "%16.16llx %16.16llx\n",
1133 vport->node_name, vport->port_name);
1134 fc_set_wwnn(lport, vport->node_name);
1135 fc_set_wwpn(lport, vport->port_name);
1138 /* configure lport network properties */
1139 rc = fcoe_netdev_config(lport, netdev);
1141 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1143 goto out_lp_destroy;
1146 /* configure lport scsi host properties */
1147 rc = fcoe_shost_config(lport, parent);
1149 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1151 goto out_lp_destroy;
1154 /* Initialize the library */
1155 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
1157 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1159 goto out_lp_destroy;
1162 /* Initialized FDMI information */
1163 fcoe_fdmi_info(lport, netdev);
1166 * fcoe_em_alloc() and fcoe_hostlist_add() both
1167 * need to be atomic with respect to other changes to the
1168 * hostlist since fcoe_em_alloc() looks for an existing EM
1169 * instance on host list updated by fcoe_hostlist_add().
1171 * This is currently handled through the fcoe_config_mutex
1175 /* lport exch manager allocation */
1176 rc = fcoe_em_config(lport);
1178 shost = vport_to_shost(vport);
1179 n_port = shost_priv(shost);
1180 rc = fc_exch_mgr_list_clone(n_port, lport);
1184 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1185 goto out_lp_destroy;
1191 fc_exch_mgr_free(lport);
1193 fcoe_hostlist_del(lport);
1194 scsi_host_put(lport->host);
1200 * fcoe_if_init() - Initialization routine for fcoe.ko
1202 * Attaches the SW FCoE transport to the FC transport
1204 * Returns: 0 on success
1206 static int __init fcoe_if_init(void)
1208 /* attach to scsi transport */
1209 fcoe_nport_scsi_transport =
1210 fc_attach_transport(&fcoe_nport_fc_functions);
1211 fcoe_vport_scsi_transport =
1212 fc_attach_transport(&fcoe_vport_fc_functions);
1214 if (!fcoe_nport_scsi_transport) {
1215 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1223 * fcoe_if_exit() - Tear down fcoe.ko
1225 * Detaches the SW FCoE transport from the FC transport
1227 * Returns: 0 on success
1229 static int __exit fcoe_if_exit(void)
1231 fc_release_transport(fcoe_nport_scsi_transport);
1232 fc_release_transport(fcoe_vport_scsi_transport);
1233 fcoe_nport_scsi_transport = NULL;
1234 fcoe_vport_scsi_transport = NULL;
1238 static void fcoe_thread_cleanup_local(unsigned int cpu)
1240 struct page *crc_eof;
1241 struct fcoe_percpu_s *p;
1243 p = per_cpu_ptr(&fcoe_percpu, cpu);
1244 spin_lock_bh(&p->fcoe_rx_list.lock);
1245 crc_eof = p->crc_eof_page;
1246 p->crc_eof_page = NULL;
1247 p->crc_eof_offset = 0;
1248 spin_unlock_bh(&p->fcoe_rx_list.lock);
1252 flush_work(&p->work);
1256 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1259 * This routine selects next CPU based on cpumask to distribute
1260 * incoming requests in round robin.
1262 * Returns: int CPU number
1264 static inline unsigned int fcoe_select_cpu(void)
1266 static unsigned int selected_cpu;
1268 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1269 if (selected_cpu >= nr_cpu_ids)
1270 selected_cpu = cpumask_first(cpu_online_mask);
1272 return selected_cpu;
1276 * fcoe_rcv() - Receive packets from a net device
1277 * @skb: The received packet
1278 * @netdev: The net device that the packet was received on
1279 * @ptype: The packet type context
1280 * @olddev: The last device net device
1282 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1283 * FC frame and passes the frame to libfc.
1285 * Returns: 0 for success
1287 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1288 struct packet_type *ptype, struct net_device *olddev)
1290 struct fc_lport *lport;
1291 struct fcoe_rcv_info *fr;
1292 struct fcoe_ctlr *ctlr;
1293 struct fcoe_interface *fcoe;
1294 struct fc_frame_header *fh;
1295 struct fcoe_percpu_s *fps;
1299 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1300 ctlr = fcoe_to_ctlr(fcoe);
1302 if (unlikely(!lport)) {
1303 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
1306 if (!lport->link_up)
1309 FCOE_NETDEV_DBG(netdev,
1310 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1311 skb->len, skb->data_len, skb->head, skb->data,
1312 skb_tail_pointer(skb), skb_end_pointer(skb),
1313 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1316 skb = skb_share_check(skb, GFP_ATOMIC);
1323 if (is_fip_mode(ctlr) &&
1324 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
1325 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1331 * Check for minimum frame length, and make sure required FCoE
1332 * and FC headers are pulled into the linear data area.
1334 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1335 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1338 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1339 fh = (struct fc_frame_header *) skb_transport_header(skb);
1341 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1342 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1347 fr = fcoe_dev_from_skb(skb);
1351 * In case the incoming frame's exchange is originated from
1352 * the initiator, then received frame's exchange id is ANDed
1353 * with fc_cpu_mask bits to get the same cpu on which exchange
1354 * was originated, otherwise select cpu using rx exchange id
1355 * or fcoe_select_cpu().
1357 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1358 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1360 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1361 cpu = fcoe_select_cpu();
1363 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1366 if (cpu >= nr_cpu_ids)
1369 fps = &per_cpu(fcoe_percpu, cpu);
1370 spin_lock(&fps->fcoe_rx_list.lock);
1372 * We now have a valid CPU that we're targeting for
1373 * this skb. We also have this receive thread locked,
1374 * so we're free to queue skbs into it's queue.
1378 * Note: We used to have a set of conditions under which we would
1379 * call fcoe_recv_frame directly, rather than queuing to the rx list
1380 * as it could save a few cycles, but doing so is prohibited, as
1381 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1382 * in softirq context.
1384 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1385 schedule_work_on(cpu, &fps->work);
1386 spin_unlock(&fps->fcoe_rx_list.lock);
1388 return NET_RX_SUCCESS;
1390 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
1398 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1399 * @skb: The packet to be transmitted
1400 * @tlen: The total length of the trailer
1402 * Returns: 0 for success
1404 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1406 struct fcoe_percpu_s *fps;
1409 fps = &get_cpu_var(fcoe_percpu);
1410 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1411 put_cpu_var(fcoe_percpu);
1417 * fcoe_xmit() - Transmit a FCoE frame
1418 * @lport: The local port that the frame is to be transmitted for
1419 * @fp: The frame to be transmitted
1421 * Return: 0 for success
1423 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1428 struct fcoe_crc_eof *cp;
1429 struct sk_buff *skb;
1430 struct fc_stats *stats;
1431 struct fc_frame_header *fh;
1432 unsigned int hlen; /* header length implies the version */
1433 unsigned int tlen; /* trailer length */
1434 unsigned int elen; /* eth header, may include vlan */
1435 struct fcoe_port *port = lport_priv(lport);
1436 struct fcoe_interface *fcoe = port->priv;
1437 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1439 struct fcoe_hdr *hp;
1441 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1443 fh = fc_frame_header_get(fp);
1445 wlen = skb->len / FCOE_WORD_TO_BYTE;
1447 if (!lport->link_up) {
1452 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1453 fcoe_ctlr_els_send(ctlr, lport, skb))
1459 elen = sizeof(struct ethhdr);
1460 hlen = sizeof(struct fcoe_hdr);
1461 tlen = sizeof(struct fcoe_crc_eof);
1462 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1465 if (likely(lport->crc_offload)) {
1466 skb->ip_summed = CHECKSUM_PARTIAL;
1467 skb->csum_start = skb_headroom(skb);
1468 skb->csum_offset = skb->len;
1471 skb->ip_summed = CHECKSUM_NONE;
1472 crc = fcoe_fc_crc(fp);
1475 /* copy port crc and eof to the skb buff */
1476 if (skb_is_nonlinear(skb)) {
1478 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1482 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1483 cp = kmap_atomic(skb_frag_page(frag))
1484 + frag->page_offset;
1486 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1489 memset(cp, 0, sizeof(*cp));
1491 cp->fcoe_crc32 = cpu_to_le32(~crc);
1493 if (skb_is_nonlinear(skb)) {
1498 /* adjust skb network/transport offsets to match mac/fcoe/port */
1499 skb_push(skb, elen + hlen);
1500 skb_reset_mac_header(skb);
1501 skb_reset_network_header(skb);
1502 skb->mac_len = elen;
1503 skb->protocol = htons(ETH_P_FCOE);
1504 skb->priority = fcoe->priority;
1506 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
1507 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
1508 /* must set skb->dev before calling vlan_put_tag */
1509 skb->dev = fcoe->realdev;
1510 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1511 vlan_dev_vlan_id(fcoe->netdev));
1513 skb->dev = fcoe->netdev;
1515 /* fill up mac and fcoe headers */
1517 eh->h_proto = htons(ETH_P_FCOE);
1518 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1520 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1522 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1523 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
1525 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1527 hp = (struct fcoe_hdr *)(eh + 1);
1528 memset(hp, 0, sizeof(*hp));
1530 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1533 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1534 if (lport->seq_offload && fr_max_payload(fp)) {
1535 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1536 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1538 skb_shinfo(skb)->gso_type = 0;
1539 skb_shinfo(skb)->gso_size = 0;
1541 /* update tx stats: regardless if LLD fails */
1542 stats = per_cpu_ptr(lport->stats, get_cpu());
1544 stats->TxWords += wlen;
1547 /* send down to lld */
1549 fcoe_port_send(port, skb);
1554 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1555 * @lport: The local port the frame was received on
1556 * @fp: The received frame
1558 * Return: 0 on passing filtering checks
1560 static inline int fcoe_filter_frames(struct fc_lport *lport,
1561 struct fc_frame *fp)
1563 struct fcoe_ctlr *ctlr;
1564 struct fcoe_interface *fcoe;
1565 struct fc_frame_header *fh;
1566 struct sk_buff *skb = (struct sk_buff *)fp;
1567 struct fc_stats *stats;
1570 * We only check CRC if no offload is available and if it is
1571 * it's solicited data, in which case, the FCP layer would
1572 * check it during the copy.
1574 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1575 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1577 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1579 fh = (struct fc_frame_header *) skb_transport_header(skb);
1580 fh = fc_frame_header_get(fp);
1581 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1584 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1585 ctlr = fcoe_to_ctlr(fcoe);
1586 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1587 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1588 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1592 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1593 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1594 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1598 stats = per_cpu_ptr(lport->stats, get_cpu());
1599 stats->InvalidCRCCount++;
1600 if (stats->InvalidCRCCount < 5)
1601 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1607 * fcoe_recv_frame() - process a single received frame
1608 * @skb: frame to process
1610 static void fcoe_recv_frame(struct sk_buff *skb)
1613 struct fc_lport *lport;
1614 struct fcoe_rcv_info *fr;
1615 struct fc_stats *stats;
1616 struct fcoe_crc_eof crc_eof;
1617 struct fc_frame *fp;
1618 struct fcoe_port *port;
1619 struct fcoe_hdr *hp;
1621 fr = fcoe_dev_from_skb(skb);
1623 if (unlikely(!lport)) {
1624 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
1629 FCOE_NETDEV_DBG(skb->dev,
1630 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1631 skb->len, skb->data_len,
1632 skb->head, skb->data, skb_tail_pointer(skb),
1633 skb_end_pointer(skb), skb->csum,
1634 skb->dev ? skb->dev->name : "<NULL>");
1636 port = lport_priv(lport);
1637 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
1640 * Frame length checks and setting up the header pointers
1641 * was done in fcoe_rcv already.
1643 hp = (struct fcoe_hdr *) skb_network_header(skb);
1645 stats = per_cpu_ptr(lport->stats, get_cpu());
1646 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1647 if (stats->ErrorFrames < 5)
1648 printk(KERN_WARNING "fcoe: FCoE version "
1649 "mismatch: The frame has "
1650 "version %x, but the "
1651 "initiator supports version "
1652 "%x\n", FC_FCOE_DECAPS_VER(hp),
1657 skb_pull(skb, sizeof(struct fcoe_hdr));
1658 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1661 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1663 fp = (struct fc_frame *)skb;
1666 fr_sof(fp) = hp->fcoe_sof;
1668 /* Copy out the CRC and EOF trailer for access */
1669 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1671 fr_eof(fp) = crc_eof.fcoe_eof;
1672 fr_crc(fp) = crc_eof.fcoe_crc32;
1673 if (pskb_trim(skb, fr_len))
1676 if (!fcoe_filter_frames(lport, fp)) {
1678 fc_exch_recv(lport, fp);
1682 stats->ErrorFrames++;
1688 * fcoe_receive_work() - The per-CPU worker
1689 * @work: The work struct
1692 static void fcoe_receive_work(struct work_struct *work)
1694 struct fcoe_percpu_s *p;
1695 struct sk_buff *skb;
1696 struct sk_buff_head tmp;
1698 p = container_of(work, struct fcoe_percpu_s, work);
1699 skb_queue_head_init(&tmp);
1701 spin_lock_bh(&p->fcoe_rx_list.lock);
1702 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1703 spin_unlock_bh(&p->fcoe_rx_list.lock);
1705 if (!skb_queue_len(&tmp))
1708 while ((skb = __skb_dequeue(&tmp)))
1709 fcoe_recv_frame(skb);
1713 * fcoe_dev_setup() - Setup the link change notification interface
1715 static void fcoe_dev_setup(void)
1717 register_dcbevent_notifier(&dcb_notifier);
1718 register_netdevice_notifier(&fcoe_notifier);
1722 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1724 static void fcoe_dev_cleanup(void)
1726 unregister_dcbevent_notifier(&dcb_notifier);
1727 unregister_netdevice_notifier(&fcoe_notifier);
1730 static struct fcoe_interface *
1731 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1733 struct fcoe_interface *fcoe;
1734 struct net_device *real_dev;
1736 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1737 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1738 real_dev = vlan_dev_real_dev(fcoe->netdev);
1740 real_dev = fcoe->netdev;
1742 if (netdev == real_dev)
1748 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1749 ulong event, void *ptr)
1751 struct dcb_app_type *entry = ptr;
1752 struct fcoe_ctlr *ctlr;
1753 struct fcoe_interface *fcoe;
1754 struct net_device *netdev;
1757 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1760 netdev = dev_get_by_index(&init_net, entry->ifindex);
1764 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1769 ctlr = fcoe_to_ctlr(fcoe);
1771 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1772 prio = ffs(entry->app.priority) - 1;
1774 prio = entry->app.priority;
1779 if (entry->app.protocol == ETH_P_FIP ||
1780 entry->app.protocol == ETH_P_FCOE)
1781 ctlr->priority = prio;
1783 if (entry->app.protocol == ETH_P_FCOE)
1784 fcoe->priority = prio;
1790 * fcoe_device_notification() - Handler for net device events
1791 * @notifier: The context of the notification
1792 * @event: The type of event
1793 * @ptr: The net device that the event was on
1795 * This function is called by the Ethernet driver in case of link change event.
1797 * Returns: 0 for success
1799 static int fcoe_device_notification(struct notifier_block *notifier,
1800 ulong event, void *ptr)
1802 struct fcoe_ctlr_device *cdev;
1803 struct fc_lport *lport = NULL;
1804 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1805 struct fcoe_ctlr *ctlr;
1806 struct fcoe_interface *fcoe;
1807 struct fcoe_port *port;
1808 struct fc_stats *stats;
1809 u32 link_possible = 1;
1813 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1814 if (fcoe->netdev == netdev) {
1815 ctlr = fcoe_to_ctlr(fcoe);
1827 case NETDEV_GOING_DOWN:
1833 case NETDEV_CHANGEMTU:
1834 if (netdev->features & NETIF_F_FCOE_MTU)
1836 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1837 sizeof(struct fcoe_crc_eof));
1838 if (mfs >= FC_MIN_MAX_FRAME)
1839 fc_set_mfs(lport, mfs);
1841 case NETDEV_REGISTER:
1843 case NETDEV_UNREGISTER:
1844 list_del(&fcoe->list);
1845 port = lport_priv(ctlr->lp);
1846 queue_work(fcoe_wq, &port->destroy_work);
1849 case NETDEV_FEAT_CHANGE:
1850 fcoe_netdev_features_change(lport, netdev);
1853 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1854 "from netdev netlink\n", event);
1857 fcoe_link_speed_update(lport);
1859 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
1861 if (link_possible && !fcoe_link_ok(lport)) {
1862 switch (cdev->enabled) {
1863 case FCOE_CTLR_DISABLED:
1864 pr_info("Link up while interface is disabled.\n");
1866 case FCOE_CTLR_ENABLED:
1867 case FCOE_CTLR_UNUSED:
1868 fcoe_ctlr_link_up(ctlr);
1870 } else if (fcoe_ctlr_link_down(ctlr)) {
1871 switch (cdev->enabled) {
1872 case FCOE_CTLR_DISABLED:
1873 pr_info("Link down while interface is disabled.\n");
1875 case FCOE_CTLR_ENABLED:
1876 case FCOE_CTLR_UNUSED:
1877 stats = per_cpu_ptr(lport->stats, get_cpu());
1878 stats->LinkFailureCount++;
1880 fcoe_clean_pending_queue(lport);
1888 * fcoe_disable() - Disables a FCoE interface
1889 * @netdev : The net_device object the Ethernet interface to create on
1891 * Called from fcoe transport.
1893 * Returns: 0 for success
1895 * Deprecated: use fcoe_ctlr_enabled()
1897 static int fcoe_disable(struct net_device *netdev)
1899 struct fcoe_ctlr *ctlr;
1900 struct fcoe_interface *fcoe;
1903 mutex_lock(&fcoe_config_mutex);
1906 fcoe = fcoe_hostlist_lookup_port(netdev);
1910 ctlr = fcoe_to_ctlr(fcoe);
1911 fcoe_ctlr_link_down(ctlr);
1912 fcoe_clean_pending_queue(ctlr->lp);
1916 mutex_unlock(&fcoe_config_mutex);
1921 * fcoe_enable() - Enables a FCoE interface
1922 * @netdev : The net_device object the Ethernet interface to create on
1924 * Called from fcoe transport.
1926 * Returns: 0 for success
1928 static int fcoe_enable(struct net_device *netdev)
1930 struct fcoe_ctlr *ctlr;
1931 struct fcoe_interface *fcoe;
1934 mutex_lock(&fcoe_config_mutex);
1936 fcoe = fcoe_hostlist_lookup_port(netdev);
1944 ctlr = fcoe_to_ctlr(fcoe);
1946 if (!fcoe_link_ok(ctlr->lp))
1947 fcoe_ctlr_link_up(ctlr);
1950 mutex_unlock(&fcoe_config_mutex);
1955 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
1956 * @cdev: The FCoE Controller that is being enabled or disabled
1958 * fcoe_sysfs will ensure that the state of 'enabled' has
1959 * changed, so no checking is necessary here. This routine simply
1960 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
1961 * When those routines are removed the functionality can be merged
1964 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
1966 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
1967 struct fc_lport *lport = ctlr->lp;
1968 struct net_device *netdev = fcoe_netdev(lport);
1970 switch (cdev->enabled) {
1971 case FCOE_CTLR_ENABLED:
1972 return fcoe_enable(netdev);
1973 case FCOE_CTLR_DISABLED:
1974 return fcoe_disable(netdev);
1975 case FCOE_CTLR_UNUSED:
1982 * fcoe_destroy() - Destroy a FCoE interface
1983 * @netdev : The net_device object the Ethernet interface to create on
1985 * Called from fcoe transport
1987 * Returns: 0 for success
1989 static int fcoe_destroy(struct net_device *netdev)
1991 struct fcoe_ctlr *ctlr;
1992 struct fcoe_interface *fcoe;
1993 struct fc_lport *lport;
1994 struct fcoe_port *port;
1997 mutex_lock(&fcoe_config_mutex);
1999 fcoe = fcoe_hostlist_lookup_port(netdev);
2004 ctlr = fcoe_to_ctlr(fcoe);
2006 port = lport_priv(lport);
2007 list_del(&fcoe->list);
2008 queue_work(fcoe_wq, &port->destroy_work);
2011 mutex_unlock(&fcoe_config_mutex);
2016 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2017 * @work: Handle to the FCoE port to be destroyed
2019 static void fcoe_destroy_work(struct work_struct *work)
2021 struct fcoe_ctlr_device *cdev;
2022 struct fcoe_ctlr *ctlr;
2023 struct fcoe_port *port;
2024 struct fcoe_interface *fcoe;
2025 struct Scsi_Host *shost;
2026 struct fc_host_attrs *fc_host;
2027 unsigned long flags;
2028 struct fc_vport *vport;
2029 struct fc_vport *next_vport;
2031 port = container_of(work, struct fcoe_port, destroy_work);
2032 shost = port->lport->host;
2033 fc_host = shost_to_fc_host(shost);
2035 /* Loop through all the vports and mark them for deletion */
2036 spin_lock_irqsave(shost->host_lock, flags);
2037 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2038 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2041 vport->flags |= FC_VPORT_DELETING;
2042 queue_work(fc_host_work_q(shost),
2043 &vport->vport_delete_work);
2046 spin_unlock_irqrestore(shost->host_lock, flags);
2048 flush_workqueue(fc_host_work_q(shost));
2050 mutex_lock(&fcoe_config_mutex);
2053 ctlr = fcoe_to_ctlr(fcoe);
2054 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2056 fcoe_if_destroy(port->lport);
2057 fcoe_interface_cleanup(fcoe);
2059 mutex_unlock(&fcoe_config_mutex);
2061 fcoe_ctlr_device_delete(cdev);
2065 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2066 * @netdev : The net_device object the Ethernet interface to create on
2068 * Called from fcoe transport.
2070 * Returns: always returns true as this is the default FCoE transport,
2071 * i.e., support all netdevs.
2073 static bool fcoe_match(struct net_device *netdev)
2079 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2080 * @netdev: The net_device object of the L2 link that should be queried
2081 * @port: The fcoe_port to bind FCoE APP priority with
2084 static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2089 struct net_device *netdev = fcoe->realdev;
2090 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2091 struct dcb_app app = {
2093 .protocol = ETH_P_FCOE
2096 /* setup DCB priority attributes. */
2097 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2098 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2100 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2101 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2102 up = dcb_ieee_getapp_mask(netdev, &app);
2103 app.protocol = ETH_P_FIP;
2104 fup = dcb_ieee_getapp_mask(netdev, &app);
2106 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2107 up = dcb_getapp(netdev, &app);
2108 app.protocol = ETH_P_FIP;
2109 fup = dcb_getapp(netdev, &app);
2112 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0;
2113 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority;
2118 enum fcoe_create_link_state {
2119 FCOE_CREATE_LINK_DOWN,
2120 FCOE_CREATE_LINK_UP,
2124 * _fcoe_create() - (internal) Create a fcoe interface
2125 * @netdev : The net_device object the Ethernet interface to create on
2126 * @fip_mode: The FIP mode for this creation
2127 * @link_state: The ctlr link state on creation
2129 * Called from either the libfcoe 'create' module parameter
2130 * via fcoe_create or from fcoe_syfs's ctlr_create file.
2132 * libfcoe's 'create' module parameter is deprecated so some
2133 * consolidation of code can be done when that interface is
2136 static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode,
2137 enum fcoe_create_link_state link_state)
2140 struct fcoe_ctlr_device *ctlr_dev;
2141 struct fcoe_ctlr *ctlr;
2142 struct fcoe_interface *fcoe;
2143 struct fc_lport *lport;
2145 mutex_lock(&fcoe_config_mutex);
2148 /* look for existing lport */
2149 if (fcoe_hostlist_lookup(netdev)) {
2154 fcoe = fcoe_interface_create(netdev, fip_mode);
2160 ctlr = fcoe_to_ctlr(fcoe);
2161 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2162 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
2163 if (IS_ERR(lport)) {
2164 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2168 fcoe_interface_cleanup(fcoe);
2169 mutex_unlock(&fcoe_config_mutex);
2170 fcoe_ctlr_device_delete(ctlr_dev);
2174 /* Make this the "master" N_Port */
2177 /* setup DCB priority attributes. */
2178 fcoe_dcb_create(fcoe);
2180 /* start FIP Discovery and FLOGI */
2181 lport->boot_time = jiffies;
2182 fc_fabric_login(lport);
2185 * If the fcoe_ctlr_device is to be set to DISABLED
2186 * it must be done after the lport is added to the
2187 * hostlist, but before the rtnl_lock is released.
2188 * This is because the rtnl_lock protects the
2189 * hostlist that fcoe_device_notification uses. If
2190 * the FCoE Controller is intended to be created
2191 * DISABLED then 'enabled' needs to be considered
2192 * handling link events. 'enabled' must be set
2193 * before the lport can be found in the hostlist
2194 * when a link up event is received.
2196 if (link_state == FCOE_CREATE_LINK_UP)
2197 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2199 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2201 if (link_state == FCOE_CREATE_LINK_UP &&
2202 !fcoe_link_ok(lport)) {
2204 fcoe_ctlr_link_up(ctlr);
2205 mutex_unlock(&fcoe_config_mutex);
2211 mutex_unlock(&fcoe_config_mutex);
2217 * fcoe_create() - Create a fcoe interface
2218 * @netdev : The net_device object the Ethernet interface to create on
2219 * @fip_mode: The FIP mode for this creation
2221 * Called from fcoe transport
2223 * Returns: 0 for success
2225 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
2227 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2231 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2232 * @netdev: The net_device to be used by the allocated FCoE Controller
2234 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2235 * in a link_down state. The allows the user an opportunity to configure
2236 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2238 * Creating in with this routine starts the FCoE Controller in Fabric
2239 * mode. The user can change to VN2VN or another mode before enabling.
2241 static int fcoe_ctlr_alloc(struct net_device *netdev)
2243 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2244 FCOE_CREATE_LINK_DOWN);
2248 * fcoe_link_ok() - Check if the link is OK for a local port
2249 * @lport: The local port to check link on
2251 * Returns: 0 if link is UP and OK, -1 if not
2254 static int fcoe_link_ok(struct fc_lport *lport)
2256 struct net_device *netdev = fcoe_netdev(lport);
2258 if (netif_oper_up(netdev))
2264 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2265 * @lport: The local port whose skbs are to be cleared
2267 * Must be called with fcoe_create_mutex held to single-thread completion.
2269 * This flushes the pending skbs by flush the work item for each CPU. The work
2270 * item on each possible CPU is flushed because we may have used the per-CPU
2271 * struct of an offline CPU.
2273 static void fcoe_percpu_clean(struct fc_lport *lport)
2275 struct fcoe_percpu_s *pp;
2278 for_each_possible_cpu(cpu) {
2279 pp = &per_cpu(fcoe_percpu, cpu);
2281 flush_work(&pp->work);
2286 * fcoe_reset() - Reset a local port
2287 * @shost: The SCSI host associated with the local port to be reset
2289 * Returns: Always 0 (return value required by FC transport template)
2291 static int fcoe_reset(struct Scsi_Host *shost)
2293 struct fc_lport *lport = shost_priv(shost);
2294 struct fcoe_port *port = lport_priv(lport);
2295 struct fcoe_interface *fcoe = port->priv;
2296 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2297 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2299 fcoe_ctlr_link_down(ctlr);
2300 fcoe_clean_pending_queue(ctlr->lp);
2302 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2303 !fcoe_link_ok(ctlr->lp))
2304 fcoe_ctlr_link_up(ctlr);
2309 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2310 * @netdev: The net device used as a key
2312 * Locking: Must be called with the RNL mutex held.
2314 * Returns: NULL or the FCoE interface
2316 static struct fcoe_interface *
2317 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2319 struct fcoe_interface *fcoe;
2321 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2322 if (fcoe->netdev == netdev)
2329 * fcoe_hostlist_lookup() - Find the local port associated with a
2331 * @netdev: The netdevice used as a key
2333 * Locking: Must be called with the RTNL mutex held
2335 * Returns: NULL or the local port
2337 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2339 struct fcoe_ctlr *ctlr;
2340 struct fcoe_interface *fcoe;
2342 fcoe = fcoe_hostlist_lookup_port(netdev);
2343 ctlr = fcoe_to_ctlr(fcoe);
2344 return (fcoe) ? ctlr->lp : NULL;
2348 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2349 * port to the hostlist
2350 * @lport: The local port that identifies the FCoE interface to be added
2352 * Locking: must be called with the RTNL mutex held
2354 * Returns: 0 for success
2356 static int fcoe_hostlist_add(const struct fc_lport *lport)
2358 struct fcoe_interface *fcoe;
2359 struct fcoe_port *port;
2361 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2363 port = lport_priv(lport);
2365 list_add_tail(&fcoe->list, &fcoe_hostlist);
2371 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2372 * port to the hostlist
2373 * @lport: The local port that identifies the FCoE interface to be added
2375 * Locking: must be called with the RTNL mutex held
2378 static void fcoe_hostlist_del(const struct fc_lport *lport)
2380 struct fcoe_interface *fcoe;
2381 struct fcoe_port *port;
2383 port = lport_priv(lport);
2385 list_del(&fcoe->list);
2389 static struct fcoe_transport fcoe_sw_transport = {
2390 .name = {FCOE_TRANSPORT_DEFAULT},
2392 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2393 .match = fcoe_match,
2394 .alloc = fcoe_ctlr_alloc,
2395 .create = fcoe_create,
2396 .destroy = fcoe_destroy,
2397 .enable = fcoe_enable,
2398 .disable = fcoe_disable,
2402 * fcoe_init() - Initialize fcoe.ko
2404 * Returns: 0 on success, or a negative value on failure
2406 static int __init fcoe_init(void)
2408 struct fcoe_percpu_s *p;
2412 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2416 /* register as a fcoe transport */
2417 rc = fcoe_transport_attach(&fcoe_sw_transport);
2419 printk(KERN_ERR "failed to register an fcoe transport, check "
2420 "if libfcoe is loaded\n");
2424 mutex_lock(&fcoe_config_mutex);
2426 for_each_possible_cpu(cpu) {
2427 p = per_cpu_ptr(&fcoe_percpu, cpu);
2428 INIT_WORK(&p->work, fcoe_receive_work);
2429 skb_queue_head_init(&p->fcoe_rx_list);
2432 /* Setup link change notification */
2435 rc = fcoe_if_init();
2439 mutex_unlock(&fcoe_config_mutex);
2443 mutex_unlock(&fcoe_config_mutex);
2444 destroy_workqueue(fcoe_wq);
2447 module_init(fcoe_init);
2450 * fcoe_exit() - Clean up fcoe.ko
2452 * Returns: 0 on success or a negative value on failure
2454 static void __exit fcoe_exit(void)
2456 struct fcoe_interface *fcoe, *tmp;
2457 struct fcoe_ctlr *ctlr;
2458 struct fcoe_port *port;
2461 mutex_lock(&fcoe_config_mutex);
2465 /* releases the associated fcoe hosts */
2467 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2468 ctlr = fcoe_to_ctlr(fcoe);
2469 port = lport_priv(ctlr->lp);
2470 fcoe_hostlist_del(port->lport);
2471 queue_work(fcoe_wq, &port->destroy_work);
2475 for_each_possible_cpu(cpu)
2476 fcoe_thread_cleanup_local(cpu);
2478 mutex_unlock(&fcoe_config_mutex);
2481 * destroy_work's may be chained but destroy_workqueue()
2482 * can take care of them. Just kill the fcoe_wq.
2484 destroy_workqueue(fcoe_wq);
2487 * Detaching from the scsi transport must happen after all
2488 * destroys are done on the fcoe_wq. destroy_workqueue will
2489 * enusre the fcoe_wq is flushed.
2493 /* detach from fcoe transport */
2494 fcoe_transport_detach(&fcoe_sw_transport);
2496 module_exit(fcoe_exit);
2499 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2500 * @seq: active sequence in the FLOGI or FDISC exchange
2501 * @fp: response frame, or error encoded in a pointer (timeout)
2502 * @arg: pointer the the fcoe_ctlr structure
2504 * This handles MAC address management for FCoE, then passes control on to
2505 * the libfc FLOGI response handler.
2507 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2509 struct fcoe_ctlr *fip = arg;
2510 struct fc_exch *exch = fc_seq_exch(seq);
2511 struct fc_lport *lport = exch->lp;
2517 mac = fr_cb(fp)->granted_mac;
2519 if (is_zero_ether_addr(mac))
2520 fcoe_ctlr_recv_flogi(fip, lport, fp);
2521 if (!is_zero_ether_addr(mac))
2522 fcoe_update_src_mac(lport, mac);
2524 fc_lport_flogi_resp(seq, fp, lport);
2528 * fcoe_logo_resp() - FCoE specific LOGO response handler
2529 * @seq: active sequence in the LOGO exchange
2530 * @fp: response frame, or error encoded in a pointer (timeout)
2531 * @arg: pointer the the fcoe_ctlr structure
2533 * This handles MAC address management for FCoE, then passes control on to
2534 * the libfc LOGO response handler.
2536 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2538 struct fc_lport *lport = arg;
2539 static u8 zero_mac[ETH_ALEN] = { 0 };
2542 fcoe_update_src_mac(lport, zero_mac);
2543 fc_lport_logo_resp(seq, fp, lport);
2547 * fcoe_elsct_send - FCoE specific ELS handler
2549 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2550 * using FCoE specific response handlers and passing the FIP controller as
2551 * the argument (the lport is still available from the exchange).
2553 * Most of the work here is just handed off to the libfc routine.
2555 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2556 struct fc_frame *fp, unsigned int op,
2557 void (*resp)(struct fc_seq *,
2560 void *arg, u32 timeout)
2562 struct fcoe_port *port = lport_priv(lport);
2563 struct fcoe_interface *fcoe = port->priv;
2564 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
2565 struct fc_frame_header *fh = fc_frame_header_get(fp);
2570 if (lport->point_to_multipoint)
2572 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2575 /* only hook onto fabric logouts, not port logouts */
2576 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2578 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2581 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2585 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2586 * @vport: fc_vport object to create a new fc_host for
2587 * @disabled: start the new fc_host in a disabled state by default?
2589 * Returns: 0 for success
2591 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2593 struct Scsi_Host *shost = vport_to_shost(vport);
2594 struct fc_lport *n_port = shost_priv(shost);
2595 struct fcoe_port *port = lport_priv(n_port);
2596 struct fcoe_interface *fcoe = port->priv;
2597 struct net_device *netdev = fcoe->netdev;
2598 struct fc_lport *vn_port;
2602 rc = fcoe_validate_vport_create(vport);
2604 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2605 printk(KERN_ERR "fcoe: Failed to create vport, "
2606 "WWPN (0x%s) already exists\n",
2611 mutex_lock(&fcoe_config_mutex);
2613 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2615 mutex_unlock(&fcoe_config_mutex);
2617 if (IS_ERR(vn_port)) {
2618 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2624 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2626 vn_port->boot_time = jiffies;
2627 fc_fabric_login(vn_port);
2628 fc_vport_setlink(vn_port);
2634 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2635 * @vport: fc_vport object that is being destroyed
2637 * Returns: 0 for success
2639 static int fcoe_vport_destroy(struct fc_vport *vport)
2641 struct Scsi_Host *shost = vport_to_shost(vport);
2642 struct fc_lport *n_port = shost_priv(shost);
2643 struct fc_lport *vn_port = vport->dd_data;
2645 mutex_lock(&n_port->lp_mutex);
2646 list_del(&vn_port->list);
2647 mutex_unlock(&n_port->lp_mutex);
2649 mutex_lock(&fcoe_config_mutex);
2650 fcoe_if_destroy(vn_port);
2651 mutex_unlock(&fcoe_config_mutex);
2657 * fcoe_vport_disable() - change vport state
2658 * @vport: vport to bring online/offline
2659 * @disable: should the vport be disabled?
2661 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2663 struct fc_lport *lport = vport->dd_data;
2666 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2667 fc_fabric_logoff(lport);
2669 lport->boot_time = jiffies;
2670 fc_fabric_login(lport);
2671 fc_vport_setlink(lport);
2678 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2679 * @vport: fc_vport with a new symbolic name string
2681 * After generating a new symbolic name string, a new RSPN_ID request is
2682 * sent to the name server. There is no response handler, so if it fails
2683 * for some reason it will not be retried.
2685 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2687 struct fc_lport *lport = vport->dd_data;
2688 struct fc_frame *fp;
2691 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2692 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2693 fcoe_netdev(lport)->name, vport->symbolic_name);
2695 if (lport->state != LPORT_ST_READY)
2698 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2699 fp = fc_frame_alloc(lport,
2700 sizeof(struct fc_ct_hdr) +
2701 sizeof(struct fc_ns_rspn) + len);
2704 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2705 NULL, NULL, 3 * lport->r_a_tov);
2708 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2710 struct fcoe_ctlr_device *ctlr_dev =
2711 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2712 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2713 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2715 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2719 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2720 * @lport: the local port
2721 * @port_id: the port ID
2722 * @fp: the received frame, if any, that caused the port_id to be set.
2724 * This routine handles the case where we received a FLOGI and are
2725 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2726 * so it can set the non-mapped mode and gateway address.
2728 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2730 static void fcoe_set_port_id(struct fc_lport *lport,
2731 u32 port_id, struct fc_frame *fp)
2733 struct fcoe_port *port = lport_priv(lport);
2734 struct fcoe_interface *fcoe = port->priv;
2735 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2737 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2738 fcoe_ctlr_recv_flogi(ctlr, lport, fp);