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>
45 #include <scsi/libfc.h>
46 #include <scsi/fc_frame.h>
47 #include <scsi/libfcoe.h>
51 MODULE_AUTHOR("Open-FCoE.org");
52 MODULE_DESCRIPTION("FCoE");
53 MODULE_LICENSE("GPL v2");
55 /* Performance tuning parameters for fcoe */
56 static unsigned int fcoe_ddp_min = 4096;
57 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
58 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
59 "Direct Data Placement (DDP).");
61 unsigned int fcoe_debug_logging;
62 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
63 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
65 static DEFINE_MUTEX(fcoe_config_mutex);
67 static struct workqueue_struct *fcoe_wq;
69 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
70 static DECLARE_COMPLETION(fcoe_flush_completion);
73 /* must only by accessed under the RTNL mutex */
74 static LIST_HEAD(fcoe_hostlist);
75 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
77 /* Function Prototypes */
78 static int fcoe_reset(struct Scsi_Host *);
79 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
80 static int fcoe_rcv(struct sk_buff *, struct net_device *,
81 struct packet_type *, struct net_device *);
82 static int fcoe_percpu_receive_thread(void *);
83 static void fcoe_percpu_clean(struct fc_lport *);
84 static int fcoe_link_speed_update(struct fc_lport *);
85 static int fcoe_link_ok(struct fc_lport *);
87 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
88 static int fcoe_hostlist_add(const struct fc_lport *);
90 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
91 static void fcoe_dev_setup(void);
92 static void fcoe_dev_cleanup(void);
93 static struct fcoe_interface
94 *fcoe_hostlist_lookup_port(const struct net_device *);
96 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
97 struct packet_type *, struct net_device *);
99 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
100 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
101 static u8 *fcoe_get_src_mac(struct fc_lport *);
102 static void fcoe_destroy_work(struct work_struct *);
104 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
106 static int fcoe_ddp_done(struct fc_lport *, u16);
107 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
109 static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
110 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
111 ulong event, void *ptr);
113 static bool fcoe_match(struct net_device *netdev);
114 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode);
115 static int fcoe_destroy(struct net_device *netdev);
116 static int fcoe_enable(struct net_device *netdev);
117 static int fcoe_disable(struct net_device *netdev);
119 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
120 u32 did, struct fc_frame *,
122 void (*resp)(struct fc_seq *,
125 void *, u32 timeout);
126 static void fcoe_recv_frame(struct sk_buff *skb);
128 static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
130 /* notification function for packets from net device */
131 static struct notifier_block fcoe_notifier = {
132 .notifier_call = fcoe_device_notification,
135 /* notification function for CPU hotplug events */
136 static struct notifier_block fcoe_cpu_notifier = {
137 .notifier_call = fcoe_cpu_callback,
140 /* notification function for DCB events */
141 static struct notifier_block dcb_notifier = {
142 .notifier_call = fcoe_dcb_app_notification,
145 static struct scsi_transport_template *fcoe_nport_scsi_transport;
146 static struct scsi_transport_template *fcoe_vport_scsi_transport;
148 static int fcoe_vport_destroy(struct fc_vport *);
149 static int fcoe_vport_create(struct fc_vport *, bool disabled);
150 static int fcoe_vport_disable(struct fc_vport *, bool disable);
151 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
152 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
154 static struct libfc_function_template fcoe_libfc_fcn_templ = {
155 .frame_send = fcoe_xmit,
156 .ddp_setup = fcoe_ddp_setup,
157 .ddp_done = fcoe_ddp_done,
158 .ddp_target = fcoe_ddp_target,
159 .elsct_send = fcoe_elsct_send,
160 .get_lesb = fcoe_get_lesb,
161 .lport_set_port_id = fcoe_set_port_id,
164 static struct fc_function_template fcoe_nport_fc_functions = {
165 .show_host_node_name = 1,
166 .show_host_port_name = 1,
167 .show_host_supported_classes = 1,
168 .show_host_supported_fc4s = 1,
169 .show_host_active_fc4s = 1,
170 .show_host_maxframe_size = 1,
171 .show_host_serial_number = 1,
172 .show_host_manufacturer = 1,
173 .show_host_model = 1,
174 .show_host_model_description = 1,
175 .show_host_hardware_version = 1,
176 .show_host_driver_version = 1,
177 .show_host_firmware_version = 1,
178 .show_host_optionrom_version = 1,
180 .show_host_port_id = 1,
181 .show_host_supported_speeds = 1,
182 .get_host_speed = fc_get_host_speed,
183 .show_host_speed = 1,
184 .show_host_port_type = 1,
185 .get_host_port_state = fc_get_host_port_state,
186 .show_host_port_state = 1,
187 .show_host_symbolic_name = 1,
189 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
190 .show_rport_maxframe_size = 1,
191 .show_rport_supported_classes = 1,
193 .show_host_fabric_name = 1,
194 .show_starget_node_name = 1,
195 .show_starget_port_name = 1,
196 .show_starget_port_id = 1,
197 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
198 .show_rport_dev_loss_tmo = 1,
199 .get_fc_host_stats = fc_get_host_stats,
200 .issue_fc_host_lip = fcoe_reset,
202 .terminate_rport_io = fc_rport_terminate_io,
204 .vport_create = fcoe_vport_create,
205 .vport_delete = fcoe_vport_destroy,
206 .vport_disable = fcoe_vport_disable,
207 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
209 .bsg_request = fc_lport_bsg_request,
212 static struct fc_function_template fcoe_vport_fc_functions = {
213 .show_host_node_name = 1,
214 .show_host_port_name = 1,
215 .show_host_supported_classes = 1,
216 .show_host_supported_fc4s = 1,
217 .show_host_active_fc4s = 1,
218 .show_host_maxframe_size = 1,
219 .show_host_serial_number = 1,
220 .show_host_manufacturer = 1,
221 .show_host_model = 1,
222 .show_host_model_description = 1,
223 .show_host_hardware_version = 1,
224 .show_host_driver_version = 1,
225 .show_host_firmware_version = 1,
226 .show_host_optionrom_version = 1,
228 .show_host_port_id = 1,
229 .show_host_supported_speeds = 1,
230 .get_host_speed = fc_get_host_speed,
231 .show_host_speed = 1,
232 .show_host_port_type = 1,
233 .get_host_port_state = fc_get_host_port_state,
234 .show_host_port_state = 1,
235 .show_host_symbolic_name = 1,
237 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
238 .show_rport_maxframe_size = 1,
239 .show_rport_supported_classes = 1,
241 .show_host_fabric_name = 1,
242 .show_starget_node_name = 1,
243 .show_starget_port_name = 1,
244 .show_starget_port_id = 1,
245 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
246 .show_rport_dev_loss_tmo = 1,
247 .get_fc_host_stats = fc_get_host_stats,
248 .issue_fc_host_lip = fcoe_reset,
250 .terminate_rport_io = fc_rport_terminate_io,
252 .bsg_request = fc_lport_bsg_request,
255 static struct scsi_host_template fcoe_shost_template = {
256 .module = THIS_MODULE,
257 .name = "FCoE Driver",
258 .proc_name = FCOE_NAME,
259 .queuecommand = fc_queuecommand,
260 .eh_abort_handler = fc_eh_abort,
261 .eh_device_reset_handler = fc_eh_device_reset,
262 .eh_host_reset_handler = fc_eh_host_reset,
263 .slave_alloc = fc_slave_alloc,
264 .change_queue_depth = fc_change_queue_depth,
265 .change_queue_type = fc_change_queue_type,
268 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
269 .use_clustering = ENABLE_CLUSTERING,
270 .sg_tablesize = SG_ALL,
271 .max_sectors = 0xffff,
275 * fcoe_interface_setup() - Setup a FCoE interface
276 * @fcoe: The new FCoE interface
277 * @netdev: The net device that the fcoe interface is on
279 * Returns : 0 for success
280 * Locking: must be called with the RTNL mutex held
282 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
283 struct net_device *netdev)
285 struct fcoe_ctlr *fip = &fcoe->ctlr;
286 struct netdev_hw_addr *ha;
287 struct net_device *real_dev;
288 u8 flogi_maddr[ETH_ALEN];
289 const struct net_device_ops *ops;
291 fcoe->netdev = netdev;
293 /* Let LLD initialize for FCoE */
294 ops = netdev->netdev_ops;
295 if (ops->ndo_fcoe_enable) {
296 if (ops->ndo_fcoe_enable(netdev))
297 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
298 " specific feature for LLD.\n");
301 /* Do not support for bonding device */
302 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
303 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
307 /* look for SAN MAC address, if multiple SAN MACs exist, only
308 * use the first one for SPMA */
309 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
310 vlan_dev_real_dev(netdev) : netdev;
311 fcoe->realdev = real_dev;
313 for_each_dev_addr(real_dev, ha) {
314 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
315 (is_valid_ether_addr(ha->addr))) {
316 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
323 /* setup Source Mac Address */
325 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
328 * Add FCoE MAC address as second unicast MAC address
329 * or enter promiscuous mode if not capable of listening
330 * for multiple unicast MACs.
332 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
333 dev_uc_add(netdev, flogi_maddr);
335 dev_uc_add(netdev, fip->ctl_src_addr);
336 if (fip->mode == FIP_MODE_VN2VN) {
337 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
338 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
340 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
343 * setup the receive function from ethernet driver
344 * on the ethertype for the given device
346 fcoe->fcoe_packet_type.func = fcoe_rcv;
347 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
348 fcoe->fcoe_packet_type.dev = netdev;
349 dev_add_pack(&fcoe->fcoe_packet_type);
351 fcoe->fip_packet_type.func = fcoe_fip_recv;
352 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
353 fcoe->fip_packet_type.dev = netdev;
354 dev_add_pack(&fcoe->fip_packet_type);
360 * fcoe_interface_create() - Create a FCoE interface on a net device
361 * @netdev: The net device to create the FCoE interface on
362 * @fip_mode: The mode to use for FIP
364 * Returns: pointer to a struct fcoe_interface or NULL on error
366 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
367 enum fip_state fip_mode)
369 struct fcoe_interface *fcoe;
372 if (!try_module_get(THIS_MODULE)) {
373 FCOE_NETDEV_DBG(netdev,
374 "Could not get a reference to the module\n");
375 fcoe = ERR_PTR(-EBUSY);
379 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
381 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
382 fcoe = ERR_PTR(-ENOMEM);
391 fcoe_ctlr_init(&fcoe->ctlr, fip_mode);
392 fcoe->ctlr.send = fcoe_fip_send;
393 fcoe->ctlr.update_mac = fcoe_update_src_mac;
394 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
396 err = fcoe_interface_setup(fcoe, netdev);
398 fcoe_ctlr_destroy(&fcoe->ctlr);
408 module_put(THIS_MODULE);
414 * fcoe_interface_remove() - remove FCoE interface from netdev
415 * @fcoe: The FCoE interface to be cleaned up
417 * Caller must be holding the RTNL mutex
419 static void fcoe_interface_remove(struct fcoe_interface *fcoe)
421 struct net_device *netdev = fcoe->netdev;
422 struct fcoe_ctlr *fip = &fcoe->ctlr;
423 u8 flogi_maddr[ETH_ALEN];
424 const struct net_device_ops *ops;
427 * Don't listen for Ethernet packets anymore.
428 * synchronize_net() ensures that the packet handlers are not running
429 * on another CPU. dev_remove_pack() would do that, this calls the
430 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
432 __dev_remove_pack(&fcoe->fcoe_packet_type);
433 __dev_remove_pack(&fcoe->fip_packet_type);
436 /* Delete secondary MAC addresses */
437 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
438 dev_uc_del(netdev, flogi_maddr);
440 dev_uc_del(netdev, fip->ctl_src_addr);
441 if (fip->mode == FIP_MODE_VN2VN) {
442 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
443 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
445 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
447 /* Tell the LLD we are done w/ FCoE */
448 ops = netdev->netdev_ops;
449 if (ops->ndo_fcoe_disable) {
450 if (ops->ndo_fcoe_disable(netdev))
451 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
452 " specific feature for LLD.\n");
459 * fcoe_interface_cleanup() - Clean up a FCoE interface
460 * @fcoe: The FCoE interface to be cleaned up
462 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
464 struct net_device *netdev = fcoe->netdev;
465 struct fcoe_ctlr *fip = &fcoe->ctlr;
469 fcoe_interface_remove(fcoe);
472 /* Release the self-reference taken during fcoe_interface_create() */
473 /* tear-down the FCoE controller */
474 fcoe_ctlr_destroy(fip);
475 scsi_host_put(fcoe->ctlr.lp->host);
478 module_put(THIS_MODULE);
482 * fcoe_fip_recv() - Handler for received FIP frames
483 * @skb: The receive skb
484 * @netdev: The associated net device
485 * @ptype: The packet_type structure which was used to register this handler
486 * @orig_dev: The original net_device the the skb was received on.
487 * (in case dev is a bond)
489 * Returns: 0 for success
491 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
492 struct packet_type *ptype,
493 struct net_device *orig_dev)
495 struct fcoe_interface *fcoe;
497 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
498 fcoe_ctlr_recv(&fcoe->ctlr, skb);
503 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
504 * @port: The FCoE port
505 * @skb: The FIP/FCoE packet to be sent
507 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
509 if (port->fcoe_pending_queue.qlen)
510 fcoe_check_wait_queue(port->lport, skb);
511 else if (fcoe_start_io(skb))
512 fcoe_check_wait_queue(port->lport, skb);
516 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
517 * @fip: The FCoE controller
518 * @skb: The FIP packet to be sent
520 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
522 skb->dev = fcoe_from_ctlr(fip)->netdev;
523 fcoe_port_send(lport_priv(fip->lp), skb);
527 * fcoe_update_src_mac() - Update the Ethernet MAC filters
528 * @lport: The local port to update the source MAC on
529 * @addr: Unicast MAC address to add
531 * Remove any previously-set unicast MAC filter.
532 * Add secondary FCoE MAC address filter for our OUI.
534 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
536 struct fcoe_port *port = lport_priv(lport);
537 struct fcoe_interface *fcoe = port->priv;
539 if (!is_zero_ether_addr(port->data_src_addr))
540 dev_uc_del(fcoe->netdev, port->data_src_addr);
541 if (!is_zero_ether_addr(addr))
542 dev_uc_add(fcoe->netdev, addr);
543 memcpy(port->data_src_addr, addr, ETH_ALEN);
547 * fcoe_get_src_mac() - return the Ethernet source address for an lport
548 * @lport: libfc lport
550 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
552 struct fcoe_port *port = lport_priv(lport);
554 return port->data_src_addr;
558 * fcoe_lport_config() - Set up a local port
559 * @lport: The local port to be setup
561 * Returns: 0 for success
563 static int fcoe_lport_config(struct fc_lport *lport)
567 lport->max_retry_count = 3;
568 lport->max_rport_retry_count = 3;
569 lport->e_d_tov = 2 * 1000; /* FC-FS default */
570 lport->r_a_tov = 2 * 2 * 1000;
571 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
572 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
573 lport->does_npiv = 1;
575 fc_lport_init_stats(lport);
577 /* lport fc_lport related configuration */
578 fc_lport_config(lport);
580 /* offload related configuration */
581 lport->crc_offload = 0;
582 lport->seq_offload = 0;
583 lport->lro_enabled = 0;
591 * fcoe_netdev_features_change - Updates the lport's offload flags based
592 * on the LLD netdev's FCoE feature flags
594 static void fcoe_netdev_features_change(struct fc_lport *lport,
595 struct net_device *netdev)
597 mutex_lock(&lport->lp_mutex);
599 if (netdev->features & NETIF_F_SG)
604 if (netdev->features & NETIF_F_FCOE_CRC) {
605 lport->crc_offload = 1;
606 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
608 lport->crc_offload = 0;
611 if (netdev->features & NETIF_F_FSO) {
612 lport->seq_offload = 1;
613 lport->lso_max = netdev->gso_max_size;
614 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
617 lport->seq_offload = 0;
621 if (netdev->fcoe_ddp_xid) {
622 lport->lro_enabled = 1;
623 lport->lro_xid = netdev->fcoe_ddp_xid;
624 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
627 lport->lro_enabled = 0;
631 mutex_unlock(&lport->lp_mutex);
635 * fcoe_netdev_config() - Set up net devive for SW FCoE
636 * @lport: The local port that is associated with the net device
637 * @netdev: The associated net device
639 * Must be called after fcoe_lport_config() as it will use local port mutex
641 * Returns: 0 for success
643 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
647 struct fcoe_interface *fcoe;
648 struct fcoe_port *port;
650 /* Setup lport private data to point to fcoe softc */
651 port = lport_priv(lport);
655 * Determine max frame size based on underlying device and optional
656 * user-configured limit. If the MFS is too low, fcoe_link_ok()
657 * will return 0, so do this first.
660 if (netdev->features & NETIF_F_FCOE_MTU) {
662 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
664 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
665 if (fc_set_mfs(lport, mfs))
668 /* offload features support */
669 fcoe_netdev_features_change(lport, netdev);
671 skb_queue_head_init(&port->fcoe_pending_queue);
672 port->fcoe_pending_queue_active = 0;
673 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
675 fcoe_link_speed_update(lport);
678 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
679 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
680 fc_set_wwnn(lport, wwnn);
681 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
682 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr,
684 fc_set_wwpn(lport, wwpn);
691 * fcoe_shost_config() - Set up the SCSI host associated with a local port
692 * @lport: The local port
693 * @dev: The device associated with the SCSI host
695 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
697 * Returns: 0 for success
699 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
703 /* lport scsi host config */
704 lport->host->max_lun = FCOE_MAX_LUN;
705 lport->host->max_id = FCOE_MAX_FCP_TARGET;
706 lport->host->max_channel = 0;
707 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
710 lport->host->transportt = fcoe_vport_scsi_transport;
712 lport->host->transportt = fcoe_nport_scsi_transport;
714 /* add the new host to the SCSI-ml */
715 rc = scsi_add_host(lport->host, dev);
717 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
718 "error on scsi_add_host\n");
723 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
725 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
726 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
727 fcoe_netdev(lport)->name);
734 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
735 * @lport: The local port that is associated with the net device
736 * @netdev: The associated net device
738 * Must be called after fcoe_shost_config() as it will use local port mutex
741 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
743 struct fcoe_interface *fcoe;
744 struct fcoe_port *port;
745 struct net_device *realdev;
747 struct netdev_fcoe_hbainfo fdmi;
749 port = lport_priv(lport);
751 realdev = fcoe->realdev;
756 /* No FDMI state m/c for NPIV ports */
760 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
761 memset(&fdmi, 0, sizeof(fdmi));
762 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
765 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
766 "information from netdev.\n");
770 snprintf(fc_host_serial_number(lport->host),
771 FC_SERIAL_NUMBER_SIZE,
774 snprintf(fc_host_manufacturer(lport->host),
775 FC_SERIAL_NUMBER_SIZE,
778 snprintf(fc_host_model(lport->host),
779 FC_SYMBOLIC_NAME_SIZE,
782 snprintf(fc_host_model_description(lport->host),
783 FC_SYMBOLIC_NAME_SIZE,
785 fdmi.model_description);
786 snprintf(fc_host_hardware_version(lport->host),
787 FC_VERSION_STRING_SIZE,
789 fdmi.hardware_version);
790 snprintf(fc_host_driver_version(lport->host),
791 FC_VERSION_STRING_SIZE,
793 fdmi.driver_version);
794 snprintf(fc_host_optionrom_version(lport->host),
795 FC_VERSION_STRING_SIZE,
797 fdmi.optionrom_version);
798 snprintf(fc_host_firmware_version(lport->host),
799 FC_VERSION_STRING_SIZE,
801 fdmi.firmware_version);
803 /* Enable FDMI lport states */
804 lport->fdmi_enabled = 1;
806 lport->fdmi_enabled = 0;
807 printk(KERN_INFO "fcoe: No FDMI support.\n");
812 * fcoe_oem_match() - The match routine for the offloaded exchange manager
815 * This routine will be associated with an exchange manager (EM). When
816 * the libfc exchange handling code is looking for an EM to use it will
817 * call this routine and pass it the frame that it wishes to send. This
818 * routine will return True if the associated EM is to be used and False
819 * if the echange code should continue looking for an EM.
821 * The offload EM that this routine is associated with will handle any
822 * packets that are for SCSI read requests.
824 * This has been enhanced to work when FCoE stack is operating in target
827 * Returns: True for read types I/O, otherwise returns false.
829 static bool fcoe_oem_match(struct fc_frame *fp)
831 struct fc_frame_header *fh = fc_frame_header_get(fp);
832 struct fcp_cmnd *fcp;
834 if (fc_fcp_is_read(fr_fsp(fp)) &&
835 (fr_fsp(fp)->data_len > fcoe_ddp_min))
837 else if ((fr_fsp(fp) == NULL) &&
838 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
839 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
840 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
841 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
842 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
849 * fcoe_em_config() - Allocate and configure an exchange manager
850 * @lport: The local port that the new EM will be associated with
852 * Returns: 0 on success
854 static inline int fcoe_em_config(struct fc_lport *lport)
856 struct fcoe_port *port = lport_priv(lport);
857 struct fcoe_interface *fcoe = port->priv;
858 struct fcoe_interface *oldfcoe = NULL;
859 struct net_device *old_real_dev, *cur_real_dev;
860 u16 min_xid = FCOE_MIN_XID;
861 u16 max_xid = FCOE_MAX_XID;
864 * Check if need to allocate an em instance for
865 * offload exchange ids to be shared across all VN_PORTs/lport.
867 if (!lport->lro_enabled || !lport->lro_xid ||
868 (lport->lro_xid >= max_xid)) {
874 * Reuse existing offload em instance in case
875 * it is already allocated on real eth device
877 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
878 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
880 cur_real_dev = fcoe->netdev;
882 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
883 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
884 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
886 old_real_dev = oldfcoe->netdev;
888 if (cur_real_dev == old_real_dev) {
889 fcoe->oem = oldfcoe->oem;
895 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
896 printk(KERN_ERR "fcoe_em_config: failed to add "
897 "offload em:%p on interface:%s\n",
898 fcoe->oem, fcoe->netdev->name);
902 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
903 FCOE_MIN_XID, lport->lro_xid,
906 printk(KERN_ERR "fcoe_em_config: failed to allocate "
907 "em for offload exches on interface:%s\n",
914 * Exclude offload EM xid range from next EM xid range.
916 min_xid += lport->lro_xid + 1;
919 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
920 printk(KERN_ERR "fcoe_em_config: failed to "
921 "allocate em on interface %s\n", fcoe->netdev->name);
929 * fcoe_if_destroy() - Tear down a SW FCoE instance
930 * @lport: The local port to be destroyed
933 static void fcoe_if_destroy(struct fc_lport *lport)
935 struct fcoe_port *port = lport_priv(lport);
936 struct fcoe_interface *fcoe = port->priv;
937 struct net_device *netdev = fcoe->netdev;
939 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
941 /* Logout of the fabric */
942 fc_fabric_logoff(lport);
944 /* Cleanup the fc_lport */
945 fc_lport_destroy(lport);
947 /* Stop the transmit retry timer */
948 del_timer_sync(&port->timer);
950 /* Free existing transmit skbs */
951 fcoe_clean_pending_queue(lport);
954 if (!is_zero_ether_addr(port->data_src_addr))
955 dev_uc_del(netdev, port->data_src_addr);
959 fcoe_interface_remove(fcoe);
962 /* Free queued packets for the per-CPU receive threads */
963 fcoe_percpu_clean(lport);
965 /* Detach from the scsi-ml */
966 fc_remove_host(lport->host);
967 scsi_remove_host(lport->host);
969 /* Destroy lport scsi_priv */
970 fc_fcp_destroy(lport);
972 /* There are no more rports or I/O, free the EM */
973 fc_exch_mgr_free(lport);
975 /* Free memory used by statistical counters */
976 fc_lport_free_stats(lport);
979 * Release the Scsi_Host for vport but hold on to
980 * master lport until it fcoe interface fully cleaned-up.
983 scsi_host_put(lport->host);
987 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
988 * @lport: The local port to setup DDP for
989 * @xid: The exchange ID for this DDP transfer
990 * @sgl: The scatterlist describing this transfer
991 * @sgc: The number of sg items
993 * Returns: 0 if the DDP context was not configured
995 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
996 struct scatterlist *sgl, unsigned int sgc)
998 struct net_device *netdev = fcoe_netdev(lport);
1000 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1001 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1009 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1010 * @lport: The local port to setup DDP for
1011 * @xid: The exchange ID for this DDP transfer
1012 * @sgl: The scatterlist describing this transfer
1013 * @sgc: The number of sg items
1015 * Returns: 0 if the DDP context was not configured
1017 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1018 struct scatterlist *sgl, unsigned int sgc)
1020 struct net_device *netdev = fcoe_netdev(lport);
1022 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1023 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1031 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1032 * @lport: The local port to complete DDP on
1033 * @xid: The exchange ID for this DDP transfer
1035 * Returns: the length of data that have been completed by DDP
1037 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1039 struct net_device *netdev = fcoe_netdev(lport);
1041 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1042 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1047 * fcoe_if_create() - Create a FCoE instance on an interface
1048 * @fcoe: The FCoE interface to create a local port on
1049 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1050 * @npiv: Indicates if the port is a vport or not
1052 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1054 * Returns: The allocated fc_lport or an error pointer
1056 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1057 struct device *parent, int npiv)
1059 struct net_device *netdev = fcoe->netdev;
1060 struct fc_lport *lport, *n_port;
1061 struct fcoe_port *port;
1062 struct Scsi_Host *shost;
1065 * parent is only a vport if npiv is 1,
1066 * but we'll only use vport in that case so go ahead and set it
1068 struct fc_vport *vport = dev_to_vport(parent);
1070 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1073 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1075 lport = libfc_vport_create(vport, sizeof(*port));
1078 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1082 port = lport_priv(lport);
1083 port->lport = lport;
1085 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1086 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1087 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1089 /* configure a fc_lport including the exchange manager */
1090 rc = fcoe_lport_config(lport);
1092 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1098 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1099 "%16.16llx %16.16llx\n",
1100 vport->node_name, vport->port_name);
1101 fc_set_wwnn(lport, vport->node_name);
1102 fc_set_wwpn(lport, vport->port_name);
1105 /* configure lport network properties */
1106 rc = fcoe_netdev_config(lport, netdev);
1108 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1110 goto out_lp_destroy;
1113 /* configure lport scsi host properties */
1114 rc = fcoe_shost_config(lport, parent);
1116 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1118 goto out_lp_destroy;
1121 /* Initialize the library */
1122 rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1);
1124 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1126 goto out_lp_destroy;
1129 /* Initialized FDMI information */
1130 fcoe_fdmi_info(lport, netdev);
1133 * fcoe_em_alloc() and fcoe_hostlist_add() both
1134 * need to be atomic with respect to other changes to the
1135 * hostlist since fcoe_em_alloc() looks for an existing EM
1136 * instance on host list updated by fcoe_hostlist_add().
1138 * This is currently handled through the fcoe_config_mutex
1142 /* lport exch manager allocation */
1143 rc = fcoe_em_config(lport);
1145 shost = vport_to_shost(vport);
1146 n_port = shost_priv(shost);
1147 rc = fc_exch_mgr_list_clone(n_port, lport);
1151 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1152 goto out_lp_destroy;
1158 fc_exch_mgr_free(lport);
1160 scsi_host_put(lport->host);
1166 * fcoe_if_init() - Initialization routine for fcoe.ko
1168 * Attaches the SW FCoE transport to the FC transport
1170 * Returns: 0 on success
1172 static int __init fcoe_if_init(void)
1174 /* attach to scsi transport */
1175 fcoe_nport_scsi_transport =
1176 fc_attach_transport(&fcoe_nport_fc_functions);
1177 fcoe_vport_scsi_transport =
1178 fc_attach_transport(&fcoe_vport_fc_functions);
1180 if (!fcoe_nport_scsi_transport) {
1181 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1189 * fcoe_if_exit() - Tear down fcoe.ko
1191 * Detaches the SW FCoE transport from the FC transport
1193 * Returns: 0 on success
1195 static int __exit fcoe_if_exit(void)
1197 fc_release_transport(fcoe_nport_scsi_transport);
1198 fc_release_transport(fcoe_vport_scsi_transport);
1199 fcoe_nport_scsi_transport = NULL;
1200 fcoe_vport_scsi_transport = NULL;
1205 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1206 * @cpu: The CPU index of the CPU to create a receive thread for
1208 static void fcoe_percpu_thread_create(unsigned int cpu)
1210 struct fcoe_percpu_s *p;
1211 struct task_struct *thread;
1213 p = &per_cpu(fcoe_percpu, cpu);
1215 thread = kthread_create_on_node(fcoe_percpu_receive_thread,
1216 (void *)p, cpu_to_node(cpu),
1217 "fcoethread/%d", cpu);
1219 if (likely(!IS_ERR(thread))) {
1220 kthread_bind(thread, cpu);
1221 wake_up_process(thread);
1223 spin_lock_bh(&p->fcoe_rx_list.lock);
1225 spin_unlock_bh(&p->fcoe_rx_list.lock);
1230 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1231 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1233 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1234 * current CPU's Rx thread. If the thread being destroyed is bound to
1235 * the CPU processing this context the skbs will be freed.
1237 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1239 struct fcoe_percpu_s *p;
1240 struct task_struct *thread;
1241 struct page *crc_eof;
1242 struct sk_buff *skb;
1244 struct fcoe_percpu_s *p0;
1245 unsigned targ_cpu = get_cpu();
1246 #endif /* CONFIG_SMP */
1248 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1250 /* Prevent any new skbs from being queued for this CPU. */
1251 p = &per_cpu(fcoe_percpu, cpu);
1252 spin_lock_bh(&p->fcoe_rx_list.lock);
1255 crc_eof = p->crc_eof_page;
1256 p->crc_eof_page = NULL;
1257 p->crc_eof_offset = 0;
1258 spin_unlock_bh(&p->fcoe_rx_list.lock);
1262 * Don't bother moving the skb's if this context is running
1263 * on the same CPU that is having its thread destroyed. This
1264 * can easily happen when the module is removed.
1266 if (cpu != targ_cpu) {
1267 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1268 spin_lock_bh(&p0->fcoe_rx_list.lock);
1270 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1273 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1274 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1275 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1278 * The targeted CPU is not initialized and cannot accept
1279 * new skbs. Unlock the targeted CPU and drop the skbs
1280 * on the CPU that is going offline.
1282 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1284 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1288 * This scenario occurs when the module is being removed
1289 * and all threads are being destroyed. skbs will continue
1290 * to be shifted from the CPU thread that is being removed
1291 * to the CPU thread associated with the CPU that is processing
1292 * the module removal. Once there is only one CPU Rx thread it
1293 * will reach this case and we will drop all skbs and later
1296 spin_lock_bh(&p->fcoe_rx_list.lock);
1297 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1299 spin_unlock_bh(&p->fcoe_rx_list.lock);
1304 * This a non-SMP scenario where the singular Rx thread is
1305 * being removed. Free all skbs and stop the thread.
1307 spin_lock_bh(&p->fcoe_rx_list.lock);
1308 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1310 spin_unlock_bh(&p->fcoe_rx_list.lock);
1314 kthread_stop(thread);
1321 * fcoe_cpu_callback() - Handler for CPU hotplug events
1322 * @nfb: The callback data block
1323 * @action: The event triggering the callback
1324 * @hcpu: The index of the CPU that the event is for
1326 * This creates or destroys per-CPU data for fcoe
1328 * Returns NOTIFY_OK always.
1330 static int fcoe_cpu_callback(struct notifier_block *nfb,
1331 unsigned long action, void *hcpu)
1333 unsigned cpu = (unsigned long)hcpu;
1337 case CPU_ONLINE_FROZEN:
1338 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1339 fcoe_percpu_thread_create(cpu);
1342 case CPU_DEAD_FROZEN:
1343 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1344 fcoe_percpu_thread_destroy(cpu);
1353 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1356 * This routine selects next CPU based on cpumask to distribute
1357 * incoming requests in round robin.
1359 * Returns: int CPU number
1361 static inline unsigned int fcoe_select_cpu(void)
1363 static unsigned int selected_cpu;
1365 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1366 if (selected_cpu >= nr_cpu_ids)
1367 selected_cpu = cpumask_first(cpu_online_mask);
1369 return selected_cpu;
1373 * fcoe_rcv() - Receive packets from a net device
1374 * @skb: The received packet
1375 * @netdev: The net device that the packet was received on
1376 * @ptype: The packet type context
1377 * @olddev: The last device net device
1379 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1380 * FC frame and passes the frame to libfc.
1382 * Returns: 0 for success
1384 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1385 struct packet_type *ptype, struct net_device *olddev)
1387 struct fc_lport *lport;
1388 struct fcoe_rcv_info *fr;
1389 struct fcoe_interface *fcoe;
1390 struct fc_frame_header *fh;
1391 struct fcoe_percpu_s *fps;
1395 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1396 lport = fcoe->ctlr.lp;
1397 if (unlikely(!lport)) {
1398 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1401 if (!lport->link_up)
1404 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1405 "data:%p tail:%p end:%p sum:%d dev:%s",
1406 skb->len, skb->data_len, skb->head, skb->data,
1407 skb_tail_pointer(skb), skb_end_pointer(skb),
1408 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1412 if (is_fip_mode(&fcoe->ctlr) &&
1413 compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) {
1414 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1420 * Check for minimum frame length, and make sure required FCoE
1421 * and FC headers are pulled into the linear data area.
1423 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1424 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1427 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1428 fh = (struct fc_frame_header *) skb_transport_header(skb);
1430 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1431 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1436 fr = fcoe_dev_from_skb(skb);
1440 * In case the incoming frame's exchange is originated from
1441 * the initiator, then received frame's exchange id is ANDed
1442 * with fc_cpu_mask bits to get the same cpu on which exchange
1443 * was originated, otherwise select cpu using rx exchange id
1444 * or fcoe_select_cpu().
1446 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1447 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1449 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1450 cpu = fcoe_select_cpu();
1452 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1455 if (cpu >= nr_cpu_ids)
1458 fps = &per_cpu(fcoe_percpu, cpu);
1459 spin_lock(&fps->fcoe_rx_list.lock);
1460 if (unlikely(!fps->thread)) {
1462 * The targeted CPU is not ready, let's target
1463 * the first CPU now. For non-SMP systems this
1464 * will check the same CPU twice.
1466 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1467 "ready for incoming skb- using first online "
1470 spin_unlock(&fps->fcoe_rx_list.lock);
1471 cpu = cpumask_first(cpu_online_mask);
1472 fps = &per_cpu(fcoe_percpu, cpu);
1473 spin_lock(&fps->fcoe_rx_list.lock);
1475 spin_unlock(&fps->fcoe_rx_list.lock);
1481 * We now have a valid CPU that we're targeting for
1482 * this skb. We also have this receive thread locked,
1483 * so we're free to queue skbs into it's queue.
1487 * Note: We used to have a set of conditions under which we would
1488 * call fcoe_recv_frame directly, rather than queuing to the rx list
1489 * as it could save a few cycles, but doing so is prohibited, as
1490 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1491 * in softirq context.
1493 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1494 if (fps->thread->state == TASK_INTERRUPTIBLE)
1495 wake_up_process(fps->thread);
1496 spin_unlock(&fps->fcoe_rx_list.lock);
1500 per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++;
1508 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1509 * @skb: The packet to be transmitted
1510 * @tlen: The total length of the trailer
1512 * Returns: 0 for success
1514 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1516 struct fcoe_percpu_s *fps;
1519 fps = &get_cpu_var(fcoe_percpu);
1520 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1521 put_cpu_var(fcoe_percpu);
1527 * fcoe_xmit() - Transmit a FCoE frame
1528 * @lport: The local port that the frame is to be transmitted for
1529 * @fp: The frame to be transmitted
1531 * Return: 0 for success
1533 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1538 struct fcoe_crc_eof *cp;
1539 struct sk_buff *skb;
1540 struct fcoe_dev_stats *stats;
1541 struct fc_frame_header *fh;
1542 unsigned int hlen; /* header length implies the version */
1543 unsigned int tlen; /* trailer length */
1544 unsigned int elen; /* eth header, may include vlan */
1545 struct fcoe_port *port = lport_priv(lport);
1546 struct fcoe_interface *fcoe = port->priv;
1548 struct fcoe_hdr *hp;
1550 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1552 fh = fc_frame_header_get(fp);
1554 wlen = skb->len / FCOE_WORD_TO_BYTE;
1556 if (!lport->link_up) {
1561 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1562 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1568 elen = sizeof(struct ethhdr);
1569 hlen = sizeof(struct fcoe_hdr);
1570 tlen = sizeof(struct fcoe_crc_eof);
1571 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1574 if (likely(lport->crc_offload)) {
1575 skb->ip_summed = CHECKSUM_UNNECESSARY;
1576 skb->csum_start = skb_headroom(skb);
1577 skb->csum_offset = skb->len;
1580 skb->ip_summed = CHECKSUM_NONE;
1581 crc = fcoe_fc_crc(fp);
1584 /* copy port crc and eof to the skb buff */
1585 if (skb_is_nonlinear(skb)) {
1587 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1591 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1592 cp = kmap_atomic(skb_frag_page(frag))
1593 + frag->page_offset;
1595 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1598 memset(cp, 0, sizeof(*cp));
1600 cp->fcoe_crc32 = cpu_to_le32(~crc);
1602 if (skb_is_nonlinear(skb)) {
1607 /* adjust skb network/transport offsets to match mac/fcoe/port */
1608 skb_push(skb, elen + hlen);
1609 skb_reset_mac_header(skb);
1610 skb_reset_network_header(skb);
1611 skb->mac_len = elen;
1612 skb->protocol = htons(ETH_P_FCOE);
1613 skb->priority = port->priority;
1615 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
1616 fcoe->realdev->features & NETIF_F_HW_VLAN_TX) {
1617 skb->vlan_tci = VLAN_TAG_PRESENT |
1618 vlan_dev_vlan_id(fcoe->netdev);
1619 skb->dev = fcoe->realdev;
1621 skb->dev = fcoe->netdev;
1623 /* fill up mac and fcoe headers */
1625 eh->h_proto = htons(ETH_P_FCOE);
1626 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1627 if (fcoe->ctlr.map_dest)
1628 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1630 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1631 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1633 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1635 hp = (struct fcoe_hdr *)(eh + 1);
1636 memset(hp, 0, sizeof(*hp));
1638 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1641 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1642 if (lport->seq_offload && fr_max_payload(fp)) {
1643 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1644 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1646 skb_shinfo(skb)->gso_type = 0;
1647 skb_shinfo(skb)->gso_size = 0;
1649 /* update tx stats: regardless if LLD fails */
1650 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1652 stats->TxWords += wlen;
1655 /* send down to lld */
1657 fcoe_port_send(port, skb);
1662 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1663 * @skb: The completed skb (argument required by destructor)
1665 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1667 complete(&fcoe_flush_completion);
1671 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1672 * @lport: The local port the frame was received on
1673 * @fp: The received frame
1675 * Return: 0 on passing filtering checks
1677 static inline int fcoe_filter_frames(struct fc_lport *lport,
1678 struct fc_frame *fp)
1680 struct fcoe_interface *fcoe;
1681 struct fc_frame_header *fh;
1682 struct sk_buff *skb = (struct sk_buff *)fp;
1683 struct fcoe_dev_stats *stats;
1686 * We only check CRC if no offload is available and if it is
1687 * it's solicited data, in which case, the FCP layer would
1688 * check it during the copy.
1690 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1691 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1693 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1695 fh = (struct fc_frame_header *) skb_transport_header(skb);
1696 fh = fc_frame_header_get(fp);
1697 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1700 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1701 if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1702 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1703 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1707 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1708 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1709 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1713 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1714 stats->InvalidCRCCount++;
1715 if (stats->InvalidCRCCount < 5)
1716 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1722 * fcoe_recv_frame() - process a single received frame
1723 * @skb: frame to process
1725 static void fcoe_recv_frame(struct sk_buff *skb)
1728 struct fc_lport *lport;
1729 struct fcoe_rcv_info *fr;
1730 struct fcoe_dev_stats *stats;
1731 struct fcoe_crc_eof crc_eof;
1732 struct fc_frame *fp;
1733 struct fcoe_port *port;
1734 struct fcoe_hdr *hp;
1736 fr = fcoe_dev_from_skb(skb);
1738 if (unlikely(!lport)) {
1739 if (skb->destructor != fcoe_percpu_flush_done)
1740 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1745 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1746 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1747 skb->len, skb->data_len,
1748 skb->head, skb->data, skb_tail_pointer(skb),
1749 skb_end_pointer(skb), skb->csum,
1750 skb->dev ? skb->dev->name : "<NULL>");
1752 port = lport_priv(lport);
1753 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
1756 * Frame length checks and setting up the header pointers
1757 * was done in fcoe_rcv already.
1759 hp = (struct fcoe_hdr *) skb_network_header(skb);
1761 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1762 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1763 if (stats->ErrorFrames < 5)
1764 printk(KERN_WARNING "fcoe: FCoE version "
1765 "mismatch: The frame has "
1766 "version %x, but the "
1767 "initiator supports version "
1768 "%x\n", FC_FCOE_DECAPS_VER(hp),
1773 skb_pull(skb, sizeof(struct fcoe_hdr));
1774 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1777 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1779 fp = (struct fc_frame *)skb;
1782 fr_sof(fp) = hp->fcoe_sof;
1784 /* Copy out the CRC and EOF trailer for access */
1785 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1787 fr_eof(fp) = crc_eof.fcoe_eof;
1788 fr_crc(fp) = crc_eof.fcoe_crc32;
1789 if (pskb_trim(skb, fr_len))
1792 if (!fcoe_filter_frames(lport, fp)) {
1794 fc_exch_recv(lport, fp);
1798 stats->ErrorFrames++;
1804 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1805 * @arg: The per-CPU context
1807 * Return: 0 for success
1809 static int fcoe_percpu_receive_thread(void *arg)
1811 struct fcoe_percpu_s *p = arg;
1812 struct sk_buff *skb;
1813 struct sk_buff_head tmp;
1815 skb_queue_head_init(&tmp);
1817 set_user_nice(current, -20);
1819 while (!kthread_should_stop()) {
1821 spin_lock_bh(&p->fcoe_rx_list.lock);
1822 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1823 spin_unlock_bh(&p->fcoe_rx_list.lock);
1825 while ((skb = __skb_dequeue(&tmp)) != NULL)
1826 fcoe_recv_frame(skb);
1828 spin_lock_bh(&p->fcoe_rx_list.lock);
1829 if (!skb_queue_len(&p->fcoe_rx_list)) {
1830 set_current_state(TASK_INTERRUPTIBLE);
1831 spin_unlock_bh(&p->fcoe_rx_list.lock);
1833 set_current_state(TASK_RUNNING);
1835 spin_unlock_bh(&p->fcoe_rx_list.lock);
1841 * fcoe_dev_setup() - Setup the link change notification interface
1843 static void fcoe_dev_setup(void)
1845 register_dcbevent_notifier(&dcb_notifier);
1846 register_netdevice_notifier(&fcoe_notifier);
1850 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1852 static void fcoe_dev_cleanup(void)
1854 unregister_dcbevent_notifier(&dcb_notifier);
1855 unregister_netdevice_notifier(&fcoe_notifier);
1858 static struct fcoe_interface *
1859 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1861 struct fcoe_interface *fcoe;
1862 struct net_device *real_dev;
1864 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1865 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1866 real_dev = vlan_dev_real_dev(fcoe->netdev);
1868 real_dev = fcoe->netdev;
1870 if (netdev == real_dev)
1876 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1877 ulong event, void *ptr)
1879 struct dcb_app_type *entry = ptr;
1880 struct fcoe_interface *fcoe;
1881 struct net_device *netdev;
1882 struct fcoe_port *port;
1885 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1888 netdev = dev_get_by_index(&init_net, entry->ifindex);
1892 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1897 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1898 prio = ffs(entry->app.priority) - 1;
1900 prio = entry->app.priority;
1905 if (entry->app.protocol == ETH_P_FIP ||
1906 entry->app.protocol == ETH_P_FCOE)
1907 fcoe->ctlr.priority = prio;
1909 if (entry->app.protocol == ETH_P_FCOE) {
1910 port = lport_priv(fcoe->ctlr.lp);
1911 port->priority = prio;
1918 * fcoe_device_notification() - Handler for net device events
1919 * @notifier: The context of the notification
1920 * @event: The type of event
1921 * @ptr: The net device that the event was on
1923 * This function is called by the Ethernet driver in case of link change event.
1925 * Returns: 0 for success
1927 static int fcoe_device_notification(struct notifier_block *notifier,
1928 ulong event, void *ptr)
1930 struct fc_lport *lport = NULL;
1931 struct net_device *netdev = ptr;
1932 struct fcoe_interface *fcoe;
1933 struct fcoe_port *port;
1934 struct fcoe_dev_stats *stats;
1935 u32 link_possible = 1;
1939 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1940 if (fcoe->netdev == netdev) {
1941 lport = fcoe->ctlr.lp;
1952 case NETDEV_GOING_DOWN:
1958 case NETDEV_CHANGEMTU:
1959 if (netdev->features & NETIF_F_FCOE_MTU)
1961 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1962 sizeof(struct fcoe_crc_eof));
1963 if (mfs >= FC_MIN_MAX_FRAME)
1964 fc_set_mfs(lport, mfs);
1966 case NETDEV_REGISTER:
1968 case NETDEV_UNREGISTER:
1969 list_del(&fcoe->list);
1970 port = lport_priv(fcoe->ctlr.lp);
1971 queue_work(fcoe_wq, &port->destroy_work);
1974 case NETDEV_FEAT_CHANGE:
1975 fcoe_netdev_features_change(lport, netdev);
1978 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1979 "from netdev netlink\n", event);
1982 fcoe_link_speed_update(lport);
1984 if (link_possible && !fcoe_link_ok(lport))
1985 fcoe_ctlr_link_up(&fcoe->ctlr);
1986 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1987 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1988 stats->LinkFailureCount++;
1990 fcoe_clean_pending_queue(lport);
1997 * fcoe_disable() - Disables a FCoE interface
1998 * @netdev : The net_device object the Ethernet interface to create on
2000 * Called from fcoe transport.
2002 * Returns: 0 for success
2004 static int fcoe_disable(struct net_device *netdev)
2006 struct fcoe_interface *fcoe;
2009 mutex_lock(&fcoe_config_mutex);
2012 fcoe = fcoe_hostlist_lookup_port(netdev);
2016 fcoe_ctlr_link_down(&fcoe->ctlr);
2017 fcoe_clean_pending_queue(fcoe->ctlr.lp);
2021 mutex_unlock(&fcoe_config_mutex);
2026 * fcoe_enable() - Enables a FCoE interface
2027 * @netdev : The net_device object the Ethernet interface to create on
2029 * Called from fcoe transport.
2031 * Returns: 0 for success
2033 static int fcoe_enable(struct net_device *netdev)
2035 struct fcoe_interface *fcoe;
2038 mutex_lock(&fcoe_config_mutex);
2040 fcoe = fcoe_hostlist_lookup_port(netdev);
2045 else if (!fcoe_link_ok(fcoe->ctlr.lp))
2046 fcoe_ctlr_link_up(&fcoe->ctlr);
2048 mutex_unlock(&fcoe_config_mutex);
2053 * fcoe_destroy() - Destroy a FCoE interface
2054 * @netdev : The net_device object the Ethernet interface to create on
2056 * Called from fcoe transport
2058 * Returns: 0 for success
2060 static int fcoe_destroy(struct net_device *netdev)
2062 struct fcoe_interface *fcoe;
2063 struct fc_lport *lport;
2064 struct fcoe_port *port;
2067 mutex_lock(&fcoe_config_mutex);
2069 fcoe = fcoe_hostlist_lookup_port(netdev);
2074 lport = fcoe->ctlr.lp;
2075 port = lport_priv(lport);
2076 list_del(&fcoe->list);
2077 queue_work(fcoe_wq, &port->destroy_work);
2080 mutex_unlock(&fcoe_config_mutex);
2085 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2086 * @work: Handle to the FCoE port to be destroyed
2088 static void fcoe_destroy_work(struct work_struct *work)
2090 struct fcoe_port *port;
2091 struct fcoe_interface *fcoe;
2093 port = container_of(work, struct fcoe_port, destroy_work);
2094 mutex_lock(&fcoe_config_mutex);
2097 fcoe_if_destroy(port->lport);
2098 fcoe_interface_cleanup(fcoe);
2100 mutex_unlock(&fcoe_config_mutex);
2104 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2105 * @netdev : The net_device object the Ethernet interface to create on
2107 * Called from fcoe transport.
2109 * Returns: always returns true as this is the default FCoE transport,
2110 * i.e., support all netdevs.
2112 static bool fcoe_match(struct net_device *netdev)
2118 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2119 * @netdev: The net_device object of the L2 link that should be queried
2120 * @port: The fcoe_port to bind FCoE APP priority with
2123 static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2128 struct net_device *netdev = fcoe->realdev;
2129 struct fcoe_port *port = lport_priv(fcoe->ctlr.lp);
2130 struct dcb_app app = {
2132 .protocol = ETH_P_FCOE
2135 /* setup DCB priority attributes. */
2136 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2137 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2139 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2140 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2141 up = dcb_ieee_getapp_mask(netdev, &app);
2142 app.protocol = ETH_P_FIP;
2143 fup = dcb_ieee_getapp_mask(netdev, &app);
2145 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2146 up = dcb_getapp(netdev, &app);
2147 app.protocol = ETH_P_FIP;
2148 fup = dcb_getapp(netdev, &app);
2151 port->priority = ffs(up) ? ffs(up) - 1 : 0;
2152 fcoe->ctlr.priority = ffs(fup) ? ffs(fup) - 1 : port->priority;
2158 * fcoe_create() - Create a fcoe interface
2159 * @netdev : The net_device object the Ethernet interface to create on
2160 * @fip_mode: The FIP mode for this creation
2162 * Called from fcoe transport
2164 * Returns: 0 for success
2166 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
2169 struct fcoe_interface *fcoe;
2170 struct fc_lport *lport;
2172 mutex_lock(&fcoe_config_mutex);
2175 /* look for existing lport */
2176 if (fcoe_hostlist_lookup(netdev)) {
2181 fcoe = fcoe_interface_create(netdev, fip_mode);
2187 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
2188 if (IS_ERR(lport)) {
2189 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2193 fcoe_interface_cleanup(fcoe);
2197 /* Make this the "master" N_Port */
2198 fcoe->ctlr.lp = lport;
2200 /* setup DCB priority attributes. */
2201 fcoe_dcb_create(fcoe);
2203 /* add to lports list */
2204 fcoe_hostlist_add(lport);
2206 /* start FIP Discovery and FLOGI */
2207 lport->boot_time = jiffies;
2208 fc_fabric_login(lport);
2209 if (!fcoe_link_ok(lport)) {
2211 fcoe_ctlr_link_up(&fcoe->ctlr);
2212 mutex_unlock(&fcoe_config_mutex);
2219 mutex_unlock(&fcoe_config_mutex);
2224 * fcoe_link_speed_update() - Update the supported and actual link speeds
2225 * @lport: The local port to update speeds for
2227 * Returns: 0 if the ethtool query was successful
2228 * -1 if the ethtool query failed
2230 static int fcoe_link_speed_update(struct fc_lport *lport)
2232 struct net_device *netdev = fcoe_netdev(lport);
2233 struct ethtool_cmd ecmd;
2235 if (!__ethtool_get_settings(netdev, &ecmd)) {
2236 lport->link_supported_speeds &=
2237 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
2238 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
2239 SUPPORTED_1000baseT_Full))
2240 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
2241 if (ecmd.supported & SUPPORTED_10000baseT_Full)
2242 lport->link_supported_speeds |=
2243 FC_PORTSPEED_10GBIT;
2244 switch (ethtool_cmd_speed(&ecmd)) {
2246 lport->link_speed = FC_PORTSPEED_1GBIT;
2249 lport->link_speed = FC_PORTSPEED_10GBIT;
2258 * fcoe_link_ok() - Check if the link is OK for a local port
2259 * @lport: The local port to check link on
2261 * Returns: 0 if link is UP and OK, -1 if not
2264 static int fcoe_link_ok(struct fc_lport *lport)
2266 struct net_device *netdev = fcoe_netdev(lport);
2268 if (netif_oper_up(netdev))
2274 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2275 * @lport: The local port whose skbs are to be cleared
2277 * Must be called with fcoe_create_mutex held to single-thread completion.
2279 * This flushes the pending skbs by adding a new skb to each queue and
2280 * waiting until they are all freed. This assures us that not only are
2281 * there no packets that will be handled by the lport, but also that any
2282 * threads already handling packet have returned.
2284 static void fcoe_percpu_clean(struct fc_lport *lport)
2286 struct fcoe_percpu_s *pp;
2287 struct sk_buff *skb;
2290 for_each_possible_cpu(cpu) {
2291 pp = &per_cpu(fcoe_percpu, cpu);
2293 if (!pp->thread || !cpu_online(cpu))
2296 skb = dev_alloc_skb(0);
2300 skb->destructor = fcoe_percpu_flush_done;
2302 spin_lock_bh(&pp->fcoe_rx_list.lock);
2303 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2304 if (pp->fcoe_rx_list.qlen == 1)
2305 wake_up_process(pp->thread);
2306 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2308 wait_for_completion(&fcoe_flush_completion);
2313 * fcoe_reset() - Reset a local port
2314 * @shost: The SCSI host associated with the local port to be reset
2316 * Returns: Always 0 (return value required by FC transport template)
2318 static int fcoe_reset(struct Scsi_Host *shost)
2320 struct fc_lport *lport = shost_priv(shost);
2321 struct fcoe_port *port = lport_priv(lport);
2322 struct fcoe_interface *fcoe = port->priv;
2324 fcoe_ctlr_link_down(&fcoe->ctlr);
2325 fcoe_clean_pending_queue(fcoe->ctlr.lp);
2326 if (!fcoe_link_ok(fcoe->ctlr.lp))
2327 fcoe_ctlr_link_up(&fcoe->ctlr);
2332 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2333 * @netdev: The net device used as a key
2335 * Locking: Must be called with the RNL mutex held.
2337 * Returns: NULL or the FCoE interface
2339 static struct fcoe_interface *
2340 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2342 struct fcoe_interface *fcoe;
2344 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2345 if (fcoe->netdev == netdev)
2352 * fcoe_hostlist_lookup() - Find the local port associated with a
2354 * @netdev: The netdevice used as a key
2356 * Locking: Must be called with the RTNL mutex held
2358 * Returns: NULL or the local port
2360 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2362 struct fcoe_interface *fcoe;
2364 fcoe = fcoe_hostlist_lookup_port(netdev);
2365 return (fcoe) ? fcoe->ctlr.lp : NULL;
2369 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2370 * port to the hostlist
2371 * @lport: The local port that identifies the FCoE interface to be added
2373 * Locking: must be called with the RTNL mutex held
2375 * Returns: 0 for success
2377 static int fcoe_hostlist_add(const struct fc_lport *lport)
2379 struct fcoe_interface *fcoe;
2380 struct fcoe_port *port;
2382 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2384 port = lport_priv(lport);
2386 list_add_tail(&fcoe->list, &fcoe_hostlist);
2392 static struct fcoe_transport fcoe_sw_transport = {
2393 .name = {FCOE_TRANSPORT_DEFAULT},
2395 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2396 .match = fcoe_match,
2397 .create = fcoe_create,
2398 .destroy = fcoe_destroy,
2399 .enable = fcoe_enable,
2400 .disable = fcoe_disable,
2404 * fcoe_init() - Initialize fcoe.ko
2406 * Returns: 0 on success, or a negative value on failure
2408 static int __init fcoe_init(void)
2410 struct fcoe_percpu_s *p;
2414 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2418 /* register as a fcoe transport */
2419 rc = fcoe_transport_attach(&fcoe_sw_transport);
2421 printk(KERN_ERR "failed to register an fcoe transport, check "
2422 "if libfcoe is loaded\n");
2426 mutex_lock(&fcoe_config_mutex);
2428 for_each_possible_cpu(cpu) {
2429 p = &per_cpu(fcoe_percpu, cpu);
2430 skb_queue_head_init(&p->fcoe_rx_list);
2433 for_each_online_cpu(cpu)
2434 fcoe_percpu_thread_create(cpu);
2436 /* Initialize per CPU interrupt thread */
2437 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2441 /* Setup link change notification */
2444 rc = fcoe_if_init();
2448 mutex_unlock(&fcoe_config_mutex);
2452 for_each_online_cpu(cpu) {
2453 fcoe_percpu_thread_destroy(cpu);
2455 mutex_unlock(&fcoe_config_mutex);
2456 destroy_workqueue(fcoe_wq);
2459 module_init(fcoe_init);
2462 * fcoe_exit() - Clean up fcoe.ko
2464 * Returns: 0 on success or a negative value on failure
2466 static void __exit fcoe_exit(void)
2468 struct fcoe_interface *fcoe, *tmp;
2469 struct fcoe_port *port;
2472 mutex_lock(&fcoe_config_mutex);
2476 /* releases the associated fcoe hosts */
2478 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2479 list_del(&fcoe->list);
2480 port = lport_priv(fcoe->ctlr.lp);
2481 queue_work(fcoe_wq, &port->destroy_work);
2485 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2487 for_each_online_cpu(cpu)
2488 fcoe_percpu_thread_destroy(cpu);
2490 mutex_unlock(&fcoe_config_mutex);
2493 * destroy_work's may be chained but destroy_workqueue()
2494 * can take care of them. Just kill the fcoe_wq.
2496 destroy_workqueue(fcoe_wq);
2499 * Detaching from the scsi transport must happen after all
2500 * destroys are done on the fcoe_wq. destroy_workqueue will
2501 * enusre the fcoe_wq is flushed.
2505 /* detach from fcoe transport */
2506 fcoe_transport_detach(&fcoe_sw_transport);
2508 module_exit(fcoe_exit);
2511 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2512 * @seq: active sequence in the FLOGI or FDISC exchange
2513 * @fp: response frame, or error encoded in a pointer (timeout)
2514 * @arg: pointer the the fcoe_ctlr structure
2516 * This handles MAC address management for FCoE, then passes control on to
2517 * the libfc FLOGI response handler.
2519 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2521 struct fcoe_ctlr *fip = arg;
2522 struct fc_exch *exch = fc_seq_exch(seq);
2523 struct fc_lport *lport = exch->lp;
2529 mac = fr_cb(fp)->granted_mac;
2531 if (is_zero_ether_addr(mac))
2532 fcoe_ctlr_recv_flogi(fip, lport, fp);
2533 if (!is_zero_ether_addr(mac))
2534 fcoe_update_src_mac(lport, mac);
2536 fc_lport_flogi_resp(seq, fp, lport);
2540 * fcoe_logo_resp() - FCoE specific LOGO response handler
2541 * @seq: active sequence in the LOGO exchange
2542 * @fp: response frame, or error encoded in a pointer (timeout)
2543 * @arg: pointer the the fcoe_ctlr structure
2545 * This handles MAC address management for FCoE, then passes control on to
2546 * the libfc LOGO response handler.
2548 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2550 struct fc_lport *lport = arg;
2551 static u8 zero_mac[ETH_ALEN] = { 0 };
2554 fcoe_update_src_mac(lport, zero_mac);
2555 fc_lport_logo_resp(seq, fp, lport);
2559 * fcoe_elsct_send - FCoE specific ELS handler
2561 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2562 * using FCoE specific response handlers and passing the FIP controller as
2563 * the argument (the lport is still available from the exchange).
2565 * Most of the work here is just handed off to the libfc routine.
2567 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2568 struct fc_frame *fp, unsigned int op,
2569 void (*resp)(struct fc_seq *,
2572 void *arg, u32 timeout)
2574 struct fcoe_port *port = lport_priv(lport);
2575 struct fcoe_interface *fcoe = port->priv;
2576 struct fcoe_ctlr *fip = &fcoe->ctlr;
2577 struct fc_frame_header *fh = fc_frame_header_get(fp);
2582 if (lport->point_to_multipoint)
2584 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2587 /* only hook onto fabric logouts, not port logouts */
2588 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2590 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2593 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2597 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2598 * @vport: fc_vport object to create a new fc_host for
2599 * @disabled: start the new fc_host in a disabled state by default?
2601 * Returns: 0 for success
2603 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2605 struct Scsi_Host *shost = vport_to_shost(vport);
2606 struct fc_lport *n_port = shost_priv(shost);
2607 struct fcoe_port *port = lport_priv(n_port);
2608 struct fcoe_interface *fcoe = port->priv;
2609 struct net_device *netdev = fcoe->netdev;
2610 struct fc_lport *vn_port;
2614 rc = fcoe_validate_vport_create(vport);
2616 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2617 printk(KERN_ERR "fcoe: Failed to create vport, "
2618 "WWPN (0x%s) already exists\n",
2623 mutex_lock(&fcoe_config_mutex);
2625 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2627 mutex_unlock(&fcoe_config_mutex);
2629 if (IS_ERR(vn_port)) {
2630 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2636 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2638 vn_port->boot_time = jiffies;
2639 fc_fabric_login(vn_port);
2640 fc_vport_setlink(vn_port);
2646 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2647 * @vport: fc_vport object that is being destroyed
2649 * Returns: 0 for success
2651 static int fcoe_vport_destroy(struct fc_vport *vport)
2653 struct Scsi_Host *shost = vport_to_shost(vport);
2654 struct fc_lport *n_port = shost_priv(shost);
2655 struct fc_lport *vn_port = vport->dd_data;
2657 mutex_lock(&n_port->lp_mutex);
2658 list_del(&vn_port->list);
2659 mutex_unlock(&n_port->lp_mutex);
2661 mutex_lock(&fcoe_config_mutex);
2662 fcoe_if_destroy(vn_port);
2663 mutex_unlock(&fcoe_config_mutex);
2669 * fcoe_vport_disable() - change vport state
2670 * @vport: vport to bring online/offline
2671 * @disable: should the vport be disabled?
2673 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2675 struct fc_lport *lport = vport->dd_data;
2678 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2679 fc_fabric_logoff(lport);
2681 lport->boot_time = jiffies;
2682 fc_fabric_login(lport);
2683 fc_vport_setlink(lport);
2690 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2691 * @vport: fc_vport with a new symbolic name string
2693 * After generating a new symbolic name string, a new RSPN_ID request is
2694 * sent to the name server. There is no response handler, so if it fails
2695 * for some reason it will not be retried.
2697 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2699 struct fc_lport *lport = vport->dd_data;
2700 struct fc_frame *fp;
2703 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2704 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2705 fcoe_netdev(lport)->name, vport->symbolic_name);
2707 if (lport->state != LPORT_ST_READY)
2710 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2711 fp = fc_frame_alloc(lport,
2712 sizeof(struct fc_ct_hdr) +
2713 sizeof(struct fc_ns_rspn) + len);
2716 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2717 NULL, NULL, 3 * lport->r_a_tov);
2721 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2722 * @lport: the local port
2723 * @fc_lesb: the link error status block
2725 static void fcoe_get_lesb(struct fc_lport *lport,
2726 struct fc_els_lesb *fc_lesb)
2728 struct net_device *netdev = fcoe_netdev(lport);
2730 __fcoe_get_lesb(lport, fc_lesb, netdev);
2734 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2735 * @lport: the local port
2736 * @port_id: the port ID
2737 * @fp: the received frame, if any, that caused the port_id to be set.
2739 * This routine handles the case where we received a FLOGI and are
2740 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2741 * so it can set the non-mapped mode and gateway address.
2743 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2745 static void fcoe_set_port_id(struct fc_lport *lport,
2746 u32 port_id, struct fc_frame *fp)
2748 struct fcoe_port *port = lport_priv(lport);
2749 struct fcoe_interface *fcoe = port->priv;
2751 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2752 fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp);