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;
70 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
71 static DECLARE_COMPLETION(fcoe_flush_completion);
74 /* must only by accessed under the RTNL mutex */
75 static LIST_HEAD(fcoe_hostlist);
76 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
78 /* Function Prototypes */
79 static int fcoe_reset(struct Scsi_Host *);
80 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
81 static int fcoe_rcv(struct sk_buff *, struct net_device *,
82 struct packet_type *, struct net_device *);
83 static int fcoe_percpu_receive_thread(void *);
84 static void fcoe_percpu_clean(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 *);
89 static void fcoe_hostlist_del(const struct fc_lport *);
91 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
92 static void fcoe_dev_setup(void);
93 static void fcoe_dev_cleanup(void);
94 static struct fcoe_interface
95 *fcoe_hostlist_lookup_port(const struct net_device *);
97 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
98 struct packet_type *, struct net_device *);
100 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
101 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
102 static u8 *fcoe_get_src_mac(struct fc_lport *);
103 static void fcoe_destroy_work(struct work_struct *);
105 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
107 static int fcoe_ddp_done(struct fc_lport *, u16);
108 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
110 static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
111 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
112 ulong event, void *ptr);
114 static bool fcoe_match(struct net_device *netdev);
115 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode);
116 static int fcoe_destroy(struct net_device *netdev);
117 static int fcoe_enable(struct net_device *netdev);
118 static int fcoe_disable(struct net_device *netdev);
120 /* fcoe_syfs control interface handlers */
121 static int fcoe_ctlr_alloc(struct net_device *netdev);
122 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
125 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
126 u32 did, struct fc_frame *,
128 void (*resp)(struct fc_seq *,
131 void *, u32 timeout);
132 static void fcoe_recv_frame(struct sk_buff *skb);
134 /* notification function for packets from net device */
135 static struct notifier_block fcoe_notifier = {
136 .notifier_call = fcoe_device_notification,
139 /* notification function for CPU hotplug events */
140 static struct notifier_block fcoe_cpu_notifier = {
141 .notifier_call = fcoe_cpu_callback,
144 /* notification function for DCB events */
145 static struct notifier_block dcb_notifier = {
146 .notifier_call = fcoe_dcb_app_notification,
149 static struct scsi_transport_template *fcoe_nport_scsi_transport;
150 static struct scsi_transport_template *fcoe_vport_scsi_transport;
152 static int fcoe_vport_destroy(struct fc_vport *);
153 static int fcoe_vport_create(struct fc_vport *, bool disabled);
154 static int fcoe_vport_disable(struct fc_vport *, bool disable);
155 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
156 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
157 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
159 static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
160 .set_fcoe_ctlr_mode = fcoe_ctlr_set_fip_mode,
161 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
162 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
163 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
164 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
165 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
166 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
167 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
169 .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
170 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
173 static struct libfc_function_template fcoe_libfc_fcn_templ = {
174 .frame_send = fcoe_xmit,
175 .ddp_setup = fcoe_ddp_setup,
176 .ddp_done = fcoe_ddp_done,
177 .ddp_target = fcoe_ddp_target,
178 .elsct_send = fcoe_elsct_send,
179 .get_lesb = fcoe_get_lesb,
180 .lport_set_port_id = fcoe_set_port_id,
183 static struct fc_function_template fcoe_nport_fc_functions = {
184 .show_host_node_name = 1,
185 .show_host_port_name = 1,
186 .show_host_supported_classes = 1,
187 .show_host_supported_fc4s = 1,
188 .show_host_active_fc4s = 1,
189 .show_host_maxframe_size = 1,
190 .show_host_serial_number = 1,
191 .show_host_manufacturer = 1,
192 .show_host_model = 1,
193 .show_host_model_description = 1,
194 .show_host_hardware_version = 1,
195 .show_host_driver_version = 1,
196 .show_host_firmware_version = 1,
197 .show_host_optionrom_version = 1,
199 .show_host_port_id = 1,
200 .show_host_supported_speeds = 1,
201 .get_host_speed = fc_get_host_speed,
202 .show_host_speed = 1,
203 .show_host_port_type = 1,
204 .get_host_port_state = fc_get_host_port_state,
205 .show_host_port_state = 1,
206 .show_host_symbolic_name = 1,
208 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
209 .show_rport_maxframe_size = 1,
210 .show_rport_supported_classes = 1,
212 .show_host_fabric_name = 1,
213 .show_starget_node_name = 1,
214 .show_starget_port_name = 1,
215 .show_starget_port_id = 1,
216 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
217 .show_rport_dev_loss_tmo = 1,
218 .get_fc_host_stats = fc_get_host_stats,
219 .issue_fc_host_lip = fcoe_reset,
221 .terminate_rport_io = fc_rport_terminate_io,
223 .vport_create = fcoe_vport_create,
224 .vport_delete = fcoe_vport_destroy,
225 .vport_disable = fcoe_vport_disable,
226 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
228 .bsg_request = fc_lport_bsg_request,
231 static struct fc_function_template fcoe_vport_fc_functions = {
232 .show_host_node_name = 1,
233 .show_host_port_name = 1,
234 .show_host_supported_classes = 1,
235 .show_host_supported_fc4s = 1,
236 .show_host_active_fc4s = 1,
237 .show_host_maxframe_size = 1,
238 .show_host_serial_number = 1,
239 .show_host_manufacturer = 1,
240 .show_host_model = 1,
241 .show_host_model_description = 1,
242 .show_host_hardware_version = 1,
243 .show_host_driver_version = 1,
244 .show_host_firmware_version = 1,
245 .show_host_optionrom_version = 1,
247 .show_host_port_id = 1,
248 .show_host_supported_speeds = 1,
249 .get_host_speed = fc_get_host_speed,
250 .show_host_speed = 1,
251 .show_host_port_type = 1,
252 .get_host_port_state = fc_get_host_port_state,
253 .show_host_port_state = 1,
254 .show_host_symbolic_name = 1,
256 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
257 .show_rport_maxframe_size = 1,
258 .show_rport_supported_classes = 1,
260 .show_host_fabric_name = 1,
261 .show_starget_node_name = 1,
262 .show_starget_port_name = 1,
263 .show_starget_port_id = 1,
264 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
265 .show_rport_dev_loss_tmo = 1,
266 .get_fc_host_stats = fc_get_host_stats,
267 .issue_fc_host_lip = fcoe_reset,
269 .terminate_rport_io = fc_rport_terminate_io,
271 .bsg_request = fc_lport_bsg_request,
274 static struct scsi_host_template fcoe_shost_template = {
275 .module = THIS_MODULE,
276 .name = "FCoE Driver",
277 .proc_name = FCOE_NAME,
278 .queuecommand = fc_queuecommand,
279 .eh_abort_handler = fc_eh_abort,
280 .eh_device_reset_handler = fc_eh_device_reset,
281 .eh_host_reset_handler = fc_eh_host_reset,
282 .slave_alloc = fc_slave_alloc,
283 .change_queue_depth = scsi_change_queue_depth,
286 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
287 .use_clustering = ENABLE_CLUSTERING,
288 .sg_tablesize = SG_ALL,
289 .max_sectors = 0xffff,
291 .track_queue_depth = 1,
295 * fcoe_interface_setup() - Setup a FCoE interface
296 * @fcoe: The new FCoE interface
297 * @netdev: The net device that the fcoe interface is on
299 * Returns : 0 for success
300 * Locking: must be called with the RTNL mutex held
302 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
303 struct net_device *netdev)
305 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
306 struct netdev_hw_addr *ha;
307 struct net_device *real_dev;
308 u8 flogi_maddr[ETH_ALEN];
309 const struct net_device_ops *ops;
311 fcoe->netdev = netdev;
313 /* Let LLD initialize for FCoE */
314 ops = netdev->netdev_ops;
315 if (ops->ndo_fcoe_enable) {
316 if (ops->ndo_fcoe_enable(netdev))
317 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
318 " specific feature for LLD.\n");
321 /* Do not support for bonding device */
322 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
323 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
327 /* look for SAN MAC address, if multiple SAN MACs exist, only
328 * use the first one for SPMA */
329 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
330 vlan_dev_real_dev(netdev) : netdev;
331 fcoe->realdev = real_dev;
333 for_each_dev_addr(real_dev, ha) {
334 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
335 (is_valid_ether_addr(ha->addr))) {
336 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
343 /* setup Source Mac Address */
345 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
348 * Add FCoE MAC address as second unicast MAC address
349 * or enter promiscuous mode if not capable of listening
350 * for multiple unicast MACs.
352 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
353 dev_uc_add(netdev, flogi_maddr);
355 dev_uc_add(netdev, fip->ctl_src_addr);
356 if (fip->mode == FIP_MODE_VN2VN) {
357 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
358 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
360 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
363 * setup the receive function from ethernet driver
364 * on the ethertype for the given device
366 fcoe->fcoe_packet_type.func = fcoe_rcv;
367 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);
368 fcoe->fcoe_packet_type.dev = netdev;
369 dev_add_pack(&fcoe->fcoe_packet_type);
371 fcoe->fip_packet_type.func = fcoe_fip_recv;
372 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
373 fcoe->fip_packet_type.dev = netdev;
374 dev_add_pack(&fcoe->fip_packet_type);
380 * fcoe_interface_create() - Create a FCoE interface on a net device
381 * @netdev: The net device to create the FCoE interface on
382 * @fip_mode: The mode to use for FIP
384 * Returns: pointer to a struct fcoe_interface or NULL on error
386 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
387 enum fip_state fip_mode)
389 struct fcoe_ctlr_device *ctlr_dev;
390 struct fcoe_ctlr *ctlr;
391 struct fcoe_interface *fcoe;
395 if (!try_module_get(THIS_MODULE)) {
396 FCOE_NETDEV_DBG(netdev,
397 "Could not get a reference to the module\n");
398 fcoe = ERR_PTR(-EBUSY);
402 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
403 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
406 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
407 fcoe = ERR_PTR(-ENOMEM);
411 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
412 ctlr->cdev = ctlr_dev;
413 fcoe = fcoe_ctlr_priv(ctlr);
420 fcoe_ctlr_init(ctlr, fip_mode);
421 ctlr->send = fcoe_fip_send;
422 ctlr->update_mac = fcoe_update_src_mac;
423 ctlr->get_src_addr = fcoe_get_src_mac;
425 err = fcoe_interface_setup(fcoe, netdev);
427 fcoe_ctlr_destroy(ctlr);
428 fcoe_ctlr_device_delete(ctlr_dev);
437 module_put(THIS_MODULE);
443 * fcoe_interface_remove() - remove FCoE interface from netdev
444 * @fcoe: The FCoE interface to be cleaned up
446 * Caller must be holding the RTNL mutex
448 static void fcoe_interface_remove(struct fcoe_interface *fcoe)
450 struct net_device *netdev = fcoe->netdev;
451 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
452 u8 flogi_maddr[ETH_ALEN];
453 const struct net_device_ops *ops;
456 * Don't listen for Ethernet packets anymore.
457 * synchronize_net() ensures that the packet handlers are not running
458 * on another CPU. dev_remove_pack() would do that, this calls the
459 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
461 __dev_remove_pack(&fcoe->fcoe_packet_type);
462 __dev_remove_pack(&fcoe->fip_packet_type);
465 /* Delete secondary MAC addresses */
466 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
467 dev_uc_del(netdev, flogi_maddr);
469 dev_uc_del(netdev, fip->ctl_src_addr);
470 if (fip->mode == FIP_MODE_VN2VN) {
471 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
472 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
474 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
476 /* Tell the LLD we are done w/ FCoE */
477 ops = netdev->netdev_ops;
478 if (ops->ndo_fcoe_disable) {
479 if (ops->ndo_fcoe_disable(netdev))
480 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
481 " specific feature for LLD.\n");
488 * fcoe_interface_cleanup() - Clean up a FCoE interface
489 * @fcoe: The FCoE interface to be cleaned up
491 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
493 struct net_device *netdev = fcoe->netdev;
494 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
498 fcoe_interface_remove(fcoe);
501 /* Release the self-reference taken during fcoe_interface_create() */
502 /* tear-down the FCoE controller */
503 fcoe_ctlr_destroy(fip);
504 scsi_host_put(fip->lp->host);
506 module_put(THIS_MODULE);
510 * fcoe_fip_recv() - Handler for received FIP frames
511 * @skb: The receive skb
512 * @netdev: The associated net device
513 * @ptype: The packet_type structure which was used to register this handler
514 * @orig_dev: The original net_device the the skb was received on.
515 * (in case dev is a bond)
517 * Returns: 0 for success
519 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
520 struct packet_type *ptype,
521 struct net_device *orig_dev)
523 struct fcoe_interface *fcoe;
524 struct fcoe_ctlr *ctlr;
526 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
527 ctlr = fcoe_to_ctlr(fcoe);
528 fcoe_ctlr_recv(ctlr, skb);
533 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
534 * @port: The FCoE port
535 * @skb: The FIP/FCoE packet to be sent
537 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
539 if (port->fcoe_pending_queue.qlen)
540 fcoe_check_wait_queue(port->lport, skb);
541 else if (fcoe_start_io(skb))
542 fcoe_check_wait_queue(port->lport, skb);
546 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
547 * @fip: The FCoE controller
548 * @skb: The FIP packet to be sent
550 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
552 skb->dev = fcoe_from_ctlr(fip)->netdev;
553 fcoe_port_send(lport_priv(fip->lp), skb);
557 * fcoe_update_src_mac() - Update the Ethernet MAC filters
558 * @lport: The local port to update the source MAC on
559 * @addr: Unicast MAC address to add
561 * Remove any previously-set unicast MAC filter.
562 * Add secondary FCoE MAC address filter for our OUI.
564 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
566 struct fcoe_port *port = lport_priv(lport);
567 struct fcoe_interface *fcoe = port->priv;
569 if (!is_zero_ether_addr(port->data_src_addr))
570 dev_uc_del(fcoe->netdev, port->data_src_addr);
571 if (!is_zero_ether_addr(addr))
572 dev_uc_add(fcoe->netdev, addr);
573 memcpy(port->data_src_addr, addr, ETH_ALEN);
577 * fcoe_get_src_mac() - return the Ethernet source address for an lport
578 * @lport: libfc lport
580 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
582 struct fcoe_port *port = lport_priv(lport);
584 return port->data_src_addr;
588 * fcoe_lport_config() - Set up a local port
589 * @lport: The local port to be setup
591 * Returns: 0 for success
593 static int fcoe_lport_config(struct fc_lport *lport)
597 lport->max_retry_count = 3;
598 lport->max_rport_retry_count = 3;
599 lport->e_d_tov = 2 * 1000; /* FC-FS default */
600 lport->r_a_tov = 2 * 2 * 1000;
601 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
602 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
603 lport->does_npiv = 1;
605 fc_lport_init_stats(lport);
607 /* lport fc_lport related configuration */
608 fc_lport_config(lport);
610 /* offload related configuration */
611 lport->crc_offload = 0;
612 lport->seq_offload = 0;
613 lport->lro_enabled = 0;
621 * fcoe_netdev_features_change - Updates the lport's offload flags based
622 * on the LLD netdev's FCoE feature flags
624 static void fcoe_netdev_features_change(struct fc_lport *lport,
625 struct net_device *netdev)
627 mutex_lock(&lport->lp_mutex);
629 if (netdev->features & NETIF_F_SG)
634 if (netdev->features & NETIF_F_FCOE_CRC) {
635 lport->crc_offload = 1;
636 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
638 lport->crc_offload = 0;
641 if (netdev->features & NETIF_F_FSO) {
642 lport->seq_offload = 1;
643 lport->lso_max = netdev->gso_max_size;
644 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
647 lport->seq_offload = 0;
651 if (netdev->fcoe_ddp_xid) {
652 lport->lro_enabled = 1;
653 lport->lro_xid = netdev->fcoe_ddp_xid;
654 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
657 lport->lro_enabled = 0;
661 mutex_unlock(&lport->lp_mutex);
665 * fcoe_netdev_config() - Set up net devive for SW FCoE
666 * @lport: The local port that is associated with the net device
667 * @netdev: The associated net device
669 * Must be called after fcoe_lport_config() as it will use local port mutex
671 * Returns: 0 for success
673 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
677 struct fcoe_interface *fcoe;
678 struct fcoe_ctlr *ctlr;
679 struct fcoe_port *port;
681 /* Setup lport private data to point to fcoe softc */
682 port = lport_priv(lport);
684 ctlr = fcoe_to_ctlr(fcoe);
687 * Determine max frame size based on underlying device and optional
688 * user-configured limit. If the MFS is too low, fcoe_link_ok()
689 * will return 0, so do this first.
692 if (netdev->features & NETIF_F_FCOE_MTU) {
694 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
696 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
697 if (fc_set_mfs(lport, mfs))
700 /* offload features support */
701 fcoe_netdev_features_change(lport, netdev);
703 skb_queue_head_init(&port->fcoe_pending_queue);
704 port->fcoe_pending_queue_active = 0;
705 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
707 fcoe_link_speed_update(lport);
710 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
711 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
712 fc_set_wwnn(lport, wwnn);
713 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
714 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
716 fc_set_wwpn(lport, wwpn);
723 * fcoe_shost_config() - Set up the SCSI host associated with a local port
724 * @lport: The local port
725 * @dev: The device associated with the SCSI host
727 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
729 * Returns: 0 for success
731 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
735 /* lport scsi host config */
736 lport->host->max_lun = FCOE_MAX_LUN;
737 lport->host->max_id = FCOE_MAX_FCP_TARGET;
738 lport->host->max_channel = 0;
739 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
742 lport->host->transportt = fcoe_vport_scsi_transport;
744 lport->host->transportt = fcoe_nport_scsi_transport;
746 /* add the new host to the SCSI-ml */
747 rc = scsi_add_host(lport->host, dev);
749 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
750 "error on scsi_add_host\n");
755 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
757 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
758 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
759 fcoe_netdev(lport)->name);
766 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
767 * @lport: The local port that is associated with the net device
768 * @netdev: The associated net device
770 * Must be called after fcoe_shost_config() as it will use local port mutex
773 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
775 struct fcoe_interface *fcoe;
776 struct fcoe_port *port;
777 struct net_device *realdev;
780 port = lport_priv(lport);
782 realdev = fcoe->realdev;
787 /* No FDMI state m/c for NPIV ports */
791 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
792 struct netdev_fcoe_hbainfo *fdmi;
793 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
797 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
800 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
801 "information from netdev.\n");
805 snprintf(fc_host_serial_number(lport->host),
806 FC_SERIAL_NUMBER_SIZE,
808 fdmi->serial_number);
809 snprintf(fc_host_manufacturer(lport->host),
810 FC_SERIAL_NUMBER_SIZE,
813 snprintf(fc_host_model(lport->host),
814 FC_SYMBOLIC_NAME_SIZE,
817 snprintf(fc_host_model_description(lport->host),
818 FC_SYMBOLIC_NAME_SIZE,
820 fdmi->model_description);
821 snprintf(fc_host_hardware_version(lport->host),
822 FC_VERSION_STRING_SIZE,
824 fdmi->hardware_version);
825 snprintf(fc_host_driver_version(lport->host),
826 FC_VERSION_STRING_SIZE,
828 fdmi->driver_version);
829 snprintf(fc_host_optionrom_version(lport->host),
830 FC_VERSION_STRING_SIZE,
832 fdmi->optionrom_version);
833 snprintf(fc_host_firmware_version(lport->host),
834 FC_VERSION_STRING_SIZE,
836 fdmi->firmware_version);
838 /* Enable FDMI lport states */
839 lport->fdmi_enabled = 1;
842 lport->fdmi_enabled = 0;
843 printk(KERN_INFO "fcoe: No FDMI support.\n");
848 * fcoe_oem_match() - The match routine for the offloaded exchange manager
851 * This routine will be associated with an exchange manager (EM). When
852 * the libfc exchange handling code is looking for an EM to use it will
853 * call this routine and pass it the frame that it wishes to send. This
854 * routine will return True if the associated EM is to be used and False
855 * if the echange code should continue looking for an EM.
857 * The offload EM that this routine is associated with will handle any
858 * packets that are for SCSI read requests.
860 * This has been enhanced to work when FCoE stack is operating in target
863 * Returns: True for read types I/O, otherwise returns false.
865 static bool fcoe_oem_match(struct fc_frame *fp)
867 struct fc_frame_header *fh = fc_frame_header_get(fp);
868 struct fcp_cmnd *fcp;
870 if (fc_fcp_is_read(fr_fsp(fp)) &&
871 (fr_fsp(fp)->data_len > fcoe_ddp_min))
873 else if ((fr_fsp(fp) == NULL) &&
874 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
875 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
876 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
877 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
878 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
885 * fcoe_em_config() - Allocate and configure an exchange manager
886 * @lport: The local port that the new EM will be associated with
888 * Returns: 0 on success
890 static inline int fcoe_em_config(struct fc_lport *lport)
892 struct fcoe_port *port = lport_priv(lport);
893 struct fcoe_interface *fcoe = port->priv;
894 struct fcoe_interface *oldfcoe = NULL;
895 struct net_device *old_real_dev, *cur_real_dev;
896 u16 min_xid = FCOE_MIN_XID;
897 u16 max_xid = FCOE_MAX_XID;
900 * Check if need to allocate an em instance for
901 * offload exchange ids to be shared across all VN_PORTs/lport.
903 if (!lport->lro_enabled || !lport->lro_xid ||
904 (lport->lro_xid >= max_xid)) {
910 * Reuse existing offload em instance in case
911 * it is already allocated on real eth device
913 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
914 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
916 cur_real_dev = fcoe->netdev;
918 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
919 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
920 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
922 old_real_dev = oldfcoe->netdev;
924 if (cur_real_dev == old_real_dev) {
925 fcoe->oem = oldfcoe->oem;
931 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
932 printk(KERN_ERR "fcoe_em_config: failed to add "
933 "offload em:%p on interface:%s\n",
934 fcoe->oem, fcoe->netdev->name);
938 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
939 FCOE_MIN_XID, lport->lro_xid,
942 printk(KERN_ERR "fcoe_em_config: failed to allocate "
943 "em for offload exches on interface:%s\n",
950 * Exclude offload EM xid range from next EM xid range.
952 min_xid += lport->lro_xid + 1;
955 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
956 printk(KERN_ERR "fcoe_em_config: failed to "
957 "allocate em on interface %s\n", fcoe->netdev->name);
965 * fcoe_if_destroy() - Tear down a SW FCoE instance
966 * @lport: The local port to be destroyed
969 static void fcoe_if_destroy(struct fc_lport *lport)
971 struct fcoe_port *port = lport_priv(lport);
972 struct fcoe_interface *fcoe = port->priv;
973 struct net_device *netdev = fcoe->netdev;
975 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
977 /* Logout of the fabric */
978 fc_fabric_logoff(lport);
980 /* Cleanup the fc_lport */
981 fc_lport_destroy(lport);
983 /* Stop the transmit retry timer */
984 del_timer_sync(&port->timer);
986 /* Free existing transmit skbs */
987 fcoe_clean_pending_queue(lport);
990 if (!is_zero_ether_addr(port->data_src_addr))
991 dev_uc_del(netdev, port->data_src_addr);
995 fcoe_interface_remove(fcoe);
998 /* Free queued packets for the per-CPU receive threads */
999 fcoe_percpu_clean(lport);
1001 /* Detach from the scsi-ml */
1002 fc_remove_host(lport->host);
1003 scsi_remove_host(lport->host);
1005 /* Destroy lport scsi_priv */
1006 fc_fcp_destroy(lport);
1008 /* There are no more rports or I/O, free the EM */
1009 fc_exch_mgr_free(lport);
1011 /* Free memory used by statistical counters */
1012 fc_lport_free_stats(lport);
1015 * Release the Scsi_Host for vport but hold on to
1016 * master lport until it fcoe interface fully cleaned-up.
1019 scsi_host_put(lport->host);
1023 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1024 * @lport: The local port to setup DDP for
1025 * @xid: The exchange ID for this DDP transfer
1026 * @sgl: The scatterlist describing this transfer
1027 * @sgc: The number of sg items
1029 * Returns: 0 if the DDP context was not configured
1031 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1032 struct scatterlist *sgl, unsigned int sgc)
1034 struct net_device *netdev = fcoe_netdev(lport);
1036 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1037 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1045 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1046 * @lport: The local port to setup DDP for
1047 * @xid: The exchange ID for this DDP transfer
1048 * @sgl: The scatterlist describing this transfer
1049 * @sgc: The number of sg items
1051 * Returns: 0 if the DDP context was not configured
1053 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1054 struct scatterlist *sgl, unsigned int sgc)
1056 struct net_device *netdev = fcoe_netdev(lport);
1058 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1059 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1067 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1068 * @lport: The local port to complete DDP on
1069 * @xid: The exchange ID for this DDP transfer
1071 * Returns: the length of data that have been completed by DDP
1073 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1075 struct net_device *netdev = fcoe_netdev(lport);
1077 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1078 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1083 * fcoe_if_create() - Create a FCoE instance on an interface
1084 * @fcoe: The FCoE interface to create a local port on
1085 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1086 * @npiv: Indicates if the port is a vport or not
1088 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1090 * Returns: The allocated fc_lport or an error pointer
1092 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1093 struct device *parent, int npiv)
1095 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1096 struct net_device *netdev = fcoe->netdev;
1097 struct fc_lport *lport, *n_port;
1098 struct fcoe_port *port;
1099 struct Scsi_Host *shost;
1102 * parent is only a vport if npiv is 1,
1103 * but we'll only use vport in that case so go ahead and set it
1105 struct fc_vport *vport = dev_to_vport(parent);
1107 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1110 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1112 lport = libfc_vport_create(vport, sizeof(*port));
1115 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1119 port = lport_priv(lport);
1120 port->lport = lport;
1122 port->get_netdev = fcoe_netdev;
1123 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1124 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1125 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1128 * Need to add the lport to the hostlist
1129 * so we catch NETDEV_CHANGE events.
1131 fcoe_hostlist_add(lport);
1133 /* configure a fc_lport including the exchange manager */
1134 rc = fcoe_lport_config(lport);
1136 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1142 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1143 "%16.16llx %16.16llx\n",
1144 vport->node_name, vport->port_name);
1145 fc_set_wwnn(lport, vport->node_name);
1146 fc_set_wwpn(lport, vport->port_name);
1149 /* configure lport network properties */
1150 rc = fcoe_netdev_config(lport, netdev);
1152 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1154 goto out_lp_destroy;
1157 /* configure lport scsi host properties */
1158 rc = fcoe_shost_config(lport, parent);
1160 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1162 goto out_lp_destroy;
1165 /* Initialize the library */
1166 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
1168 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1170 goto out_lp_destroy;
1173 /* Initialized FDMI information */
1174 fcoe_fdmi_info(lport, netdev);
1177 * fcoe_em_alloc() and fcoe_hostlist_add() both
1178 * need to be atomic with respect to other changes to the
1179 * hostlist since fcoe_em_alloc() looks for an existing EM
1180 * instance on host list updated by fcoe_hostlist_add().
1182 * This is currently handled through the fcoe_config_mutex
1186 /* lport exch manager allocation */
1187 rc = fcoe_em_config(lport);
1189 shost = vport_to_shost(vport);
1190 n_port = shost_priv(shost);
1191 rc = fc_exch_mgr_list_clone(n_port, lport);
1195 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1196 goto out_lp_destroy;
1202 fc_exch_mgr_free(lport);
1204 fcoe_hostlist_del(lport);
1205 scsi_host_put(lport->host);
1211 * fcoe_if_init() - Initialization routine for fcoe.ko
1213 * Attaches the SW FCoE transport to the FC transport
1215 * Returns: 0 on success
1217 static int __init fcoe_if_init(void)
1219 /* attach to scsi transport */
1220 fcoe_nport_scsi_transport =
1221 fc_attach_transport(&fcoe_nport_fc_functions);
1222 fcoe_vport_scsi_transport =
1223 fc_attach_transport(&fcoe_vport_fc_functions);
1225 if (!fcoe_nport_scsi_transport) {
1226 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1234 * fcoe_if_exit() - Tear down fcoe.ko
1236 * Detaches the SW FCoE transport from the FC transport
1238 * Returns: 0 on success
1240 static int __exit fcoe_if_exit(void)
1242 fc_release_transport(fcoe_nport_scsi_transport);
1243 fc_release_transport(fcoe_vport_scsi_transport);
1244 fcoe_nport_scsi_transport = NULL;
1245 fcoe_vport_scsi_transport = NULL;
1250 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1251 * @cpu: The CPU index of the CPU to create a receive thread for
1253 static void fcoe_percpu_thread_create(unsigned int cpu)
1255 struct fcoe_percpu_s *p;
1256 struct task_struct *thread;
1258 p = &per_cpu(fcoe_percpu, cpu);
1260 thread = kthread_create_on_node(fcoe_percpu_receive_thread,
1261 (void *)p, cpu_to_node(cpu),
1262 "fcoethread/%d", cpu);
1264 if (likely(!IS_ERR(thread))) {
1265 kthread_bind(thread, cpu);
1266 wake_up_process(thread);
1268 spin_lock_bh(&p->fcoe_rx_list.lock);
1270 spin_unlock_bh(&p->fcoe_rx_list.lock);
1275 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1276 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1278 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1279 * current CPU's Rx thread. If the thread being destroyed is bound to
1280 * the CPU processing this context the skbs will be freed.
1282 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1284 struct fcoe_percpu_s *p;
1285 struct task_struct *thread;
1286 struct page *crc_eof;
1287 struct sk_buff *skb;
1289 struct fcoe_percpu_s *p0;
1290 unsigned targ_cpu = get_cpu();
1291 #endif /* CONFIG_SMP */
1293 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1295 /* Prevent any new skbs from being queued for this CPU. */
1296 p = &per_cpu(fcoe_percpu, cpu);
1297 spin_lock_bh(&p->fcoe_rx_list.lock);
1300 crc_eof = p->crc_eof_page;
1301 p->crc_eof_page = NULL;
1302 p->crc_eof_offset = 0;
1303 spin_unlock_bh(&p->fcoe_rx_list.lock);
1307 * Don't bother moving the skb's if this context is running
1308 * on the same CPU that is having its thread destroyed. This
1309 * can easily happen when the module is removed.
1311 if (cpu != targ_cpu) {
1312 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1313 spin_lock_bh(&p0->fcoe_rx_list.lock);
1315 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1318 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1319 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1320 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1323 * The targeted CPU is not initialized and cannot accept
1324 * new skbs. Unlock the targeted CPU and drop the skbs
1325 * on the CPU that is going offline.
1327 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1329 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1333 * This scenario occurs when the module is being removed
1334 * and all threads are being destroyed. skbs will continue
1335 * to be shifted from the CPU thread that is being removed
1336 * to the CPU thread associated with the CPU that is processing
1337 * the module removal. Once there is only one CPU Rx thread it
1338 * will reach this case and we will drop all skbs and later
1341 spin_lock_bh(&p->fcoe_rx_list.lock);
1342 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1344 spin_unlock_bh(&p->fcoe_rx_list.lock);
1349 * This a non-SMP scenario where the singular Rx thread is
1350 * being removed. Free all skbs and stop the thread.
1352 spin_lock_bh(&p->fcoe_rx_list.lock);
1353 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1355 spin_unlock_bh(&p->fcoe_rx_list.lock);
1359 kthread_stop(thread);
1366 * fcoe_cpu_callback() - Handler for CPU hotplug events
1367 * @nfb: The callback data block
1368 * @action: The event triggering the callback
1369 * @hcpu: The index of the CPU that the event is for
1371 * This creates or destroys per-CPU data for fcoe
1373 * Returns NOTIFY_OK always.
1375 static int fcoe_cpu_callback(struct notifier_block *nfb,
1376 unsigned long action, void *hcpu)
1378 unsigned cpu = (unsigned long)hcpu;
1382 case CPU_ONLINE_FROZEN:
1383 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1384 fcoe_percpu_thread_create(cpu);
1387 case CPU_DEAD_FROZEN:
1388 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1389 fcoe_percpu_thread_destroy(cpu);
1398 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1401 * This routine selects next CPU based on cpumask to distribute
1402 * incoming requests in round robin.
1404 * Returns: int CPU number
1406 static inline unsigned int fcoe_select_cpu(void)
1408 static unsigned int selected_cpu;
1410 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1411 if (selected_cpu >= nr_cpu_ids)
1412 selected_cpu = cpumask_first(cpu_online_mask);
1414 return selected_cpu;
1418 * fcoe_rcv() - Receive packets from a net device
1419 * @skb: The received packet
1420 * @netdev: The net device that the packet was received on
1421 * @ptype: The packet type context
1422 * @olddev: The last device net device
1424 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1425 * FC frame and passes the frame to libfc.
1427 * Returns: 0 for success
1429 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1430 struct packet_type *ptype, struct net_device *olddev)
1432 struct fc_lport *lport;
1433 struct fcoe_rcv_info *fr;
1434 struct fcoe_ctlr *ctlr;
1435 struct fcoe_interface *fcoe;
1436 struct fc_frame_header *fh;
1437 struct fcoe_percpu_s *fps;
1441 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1442 ctlr = fcoe_to_ctlr(fcoe);
1444 if (unlikely(!lport)) {
1445 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
1448 if (!lport->link_up)
1451 FCOE_NETDEV_DBG(netdev,
1452 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1453 skb->len, skb->data_len, skb->head, skb->data,
1454 skb_tail_pointer(skb), skb_end_pointer(skb),
1455 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1458 skb = skb_share_check(skb, GFP_ATOMIC);
1465 if (is_fip_mode(ctlr) &&
1466 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
1467 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1473 * Check for minimum frame length, and make sure required FCoE
1474 * and FC headers are pulled into the linear data area.
1476 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1477 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1480 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1481 fh = (struct fc_frame_header *) skb_transport_header(skb);
1483 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1484 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1489 fr = fcoe_dev_from_skb(skb);
1493 * In case the incoming frame's exchange is originated from
1494 * the initiator, then received frame's exchange id is ANDed
1495 * with fc_cpu_mask bits to get the same cpu on which exchange
1496 * was originated, otherwise select cpu using rx exchange id
1497 * or fcoe_select_cpu().
1499 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1500 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1502 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1503 cpu = fcoe_select_cpu();
1505 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1508 if (cpu >= nr_cpu_ids)
1511 fps = &per_cpu(fcoe_percpu, cpu);
1512 spin_lock(&fps->fcoe_rx_list.lock);
1513 if (unlikely(!fps->thread)) {
1515 * The targeted CPU is not ready, let's target
1516 * the first CPU now. For non-SMP systems this
1517 * will check the same CPU twice.
1519 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1520 "ready for incoming skb- using first online "
1523 spin_unlock(&fps->fcoe_rx_list.lock);
1524 cpu = cpumask_first(cpu_online_mask);
1525 fps = &per_cpu(fcoe_percpu, cpu);
1526 spin_lock(&fps->fcoe_rx_list.lock);
1528 spin_unlock(&fps->fcoe_rx_list.lock);
1534 * We now have a valid CPU that we're targeting for
1535 * this skb. We also have this receive thread locked,
1536 * so we're free to queue skbs into it's queue.
1540 * Note: We used to have a set of conditions under which we would
1541 * call fcoe_recv_frame directly, rather than queuing to the rx list
1542 * as it could save a few cycles, but doing so is prohibited, as
1543 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1544 * in softirq context.
1546 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1547 if (fps->thread->state == TASK_INTERRUPTIBLE)
1548 wake_up_process(fps->thread);
1549 spin_unlock(&fps->fcoe_rx_list.lock);
1551 return NET_RX_SUCCESS;
1553 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
1561 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1562 * @skb: The packet to be transmitted
1563 * @tlen: The total length of the trailer
1565 * Returns: 0 for success
1567 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1569 struct fcoe_percpu_s *fps;
1572 fps = &get_cpu_var(fcoe_percpu);
1573 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1574 put_cpu_var(fcoe_percpu);
1580 * fcoe_xmit() - Transmit a FCoE frame
1581 * @lport: The local port that the frame is to be transmitted for
1582 * @fp: The frame to be transmitted
1584 * Return: 0 for success
1586 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1591 struct fcoe_crc_eof *cp;
1592 struct sk_buff *skb;
1593 struct fc_stats *stats;
1594 struct fc_frame_header *fh;
1595 unsigned int hlen; /* header length implies the version */
1596 unsigned int tlen; /* trailer length */
1597 unsigned int elen; /* eth header, may include vlan */
1598 struct fcoe_port *port = lport_priv(lport);
1599 struct fcoe_interface *fcoe = port->priv;
1600 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1602 struct fcoe_hdr *hp;
1604 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1606 fh = fc_frame_header_get(fp);
1608 wlen = skb->len / FCOE_WORD_TO_BYTE;
1610 if (!lport->link_up) {
1615 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1616 fcoe_ctlr_els_send(ctlr, lport, skb))
1622 elen = sizeof(struct ethhdr);
1623 hlen = sizeof(struct fcoe_hdr);
1624 tlen = sizeof(struct fcoe_crc_eof);
1625 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1628 if (likely(lport->crc_offload)) {
1629 skb->ip_summed = CHECKSUM_UNNECESSARY;
1630 skb->csum_start = skb_headroom(skb);
1631 skb->csum_offset = skb->len;
1634 skb->ip_summed = CHECKSUM_NONE;
1635 crc = fcoe_fc_crc(fp);
1638 /* copy port crc and eof to the skb buff */
1639 if (skb_is_nonlinear(skb)) {
1641 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1645 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1646 cp = kmap_atomic(skb_frag_page(frag))
1647 + frag->page_offset;
1649 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1652 memset(cp, 0, sizeof(*cp));
1654 cp->fcoe_crc32 = cpu_to_le32(~crc);
1656 if (skb_is_nonlinear(skb)) {
1661 /* adjust skb network/transport offsets to match mac/fcoe/port */
1662 skb_push(skb, elen + hlen);
1663 skb_reset_mac_header(skb);
1664 skb_reset_network_header(skb);
1665 skb->mac_len = elen;
1666 skb->protocol = htons(ETH_P_FCOE);
1667 skb->priority = fcoe->priority;
1669 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
1670 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
1671 /* must set skb->dev before calling vlan_put_tag */
1672 skb->dev = fcoe->realdev;
1673 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1674 vlan_dev_vlan_id(fcoe->netdev));
1676 skb->dev = fcoe->netdev;
1678 /* fill up mac and fcoe headers */
1680 eh->h_proto = htons(ETH_P_FCOE);
1681 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1683 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1685 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1686 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
1688 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1690 hp = (struct fcoe_hdr *)(eh + 1);
1691 memset(hp, 0, sizeof(*hp));
1693 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1696 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1697 if (lport->seq_offload && fr_max_payload(fp)) {
1698 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1699 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1701 skb_shinfo(skb)->gso_type = 0;
1702 skb_shinfo(skb)->gso_size = 0;
1704 /* update tx stats: regardless if LLD fails */
1705 stats = per_cpu_ptr(lport->stats, get_cpu());
1707 stats->TxWords += wlen;
1710 /* send down to lld */
1712 fcoe_port_send(port, skb);
1717 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1718 * @skb: The completed skb (argument required by destructor)
1720 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1722 complete(&fcoe_flush_completion);
1726 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1727 * @lport: The local port the frame was received on
1728 * @fp: The received frame
1730 * Return: 0 on passing filtering checks
1732 static inline int fcoe_filter_frames(struct fc_lport *lport,
1733 struct fc_frame *fp)
1735 struct fcoe_ctlr *ctlr;
1736 struct fcoe_interface *fcoe;
1737 struct fc_frame_header *fh;
1738 struct sk_buff *skb = (struct sk_buff *)fp;
1739 struct fc_stats *stats;
1742 * We only check CRC if no offload is available and if it is
1743 * it's solicited data, in which case, the FCP layer would
1744 * check it during the copy.
1746 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1747 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1749 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1751 fh = (struct fc_frame_header *) skb_transport_header(skb);
1752 fh = fc_frame_header_get(fp);
1753 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1756 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1757 ctlr = fcoe_to_ctlr(fcoe);
1758 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1759 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1760 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1764 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1765 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1766 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1770 stats = per_cpu_ptr(lport->stats, get_cpu());
1771 stats->InvalidCRCCount++;
1772 if (stats->InvalidCRCCount < 5)
1773 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1779 * fcoe_recv_frame() - process a single received frame
1780 * @skb: frame to process
1782 static void fcoe_recv_frame(struct sk_buff *skb)
1785 struct fc_lport *lport;
1786 struct fcoe_rcv_info *fr;
1787 struct fc_stats *stats;
1788 struct fcoe_crc_eof crc_eof;
1789 struct fc_frame *fp;
1790 struct fcoe_port *port;
1791 struct fcoe_hdr *hp;
1793 fr = fcoe_dev_from_skb(skb);
1795 if (unlikely(!lport)) {
1796 if (skb->destructor != fcoe_percpu_flush_done)
1797 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
1802 FCOE_NETDEV_DBG(skb->dev,
1803 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1804 skb->len, skb->data_len,
1805 skb->head, skb->data, skb_tail_pointer(skb),
1806 skb_end_pointer(skb), skb->csum,
1807 skb->dev ? skb->dev->name : "<NULL>");
1809 port = lport_priv(lport);
1810 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
1813 * Frame length checks and setting up the header pointers
1814 * was done in fcoe_rcv already.
1816 hp = (struct fcoe_hdr *) skb_network_header(skb);
1818 stats = per_cpu_ptr(lport->stats, get_cpu());
1819 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1820 if (stats->ErrorFrames < 5)
1821 printk(KERN_WARNING "fcoe: FCoE version "
1822 "mismatch: The frame has "
1823 "version %x, but the "
1824 "initiator supports version "
1825 "%x\n", FC_FCOE_DECAPS_VER(hp),
1830 skb_pull(skb, sizeof(struct fcoe_hdr));
1831 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1834 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1836 fp = (struct fc_frame *)skb;
1839 fr_sof(fp) = hp->fcoe_sof;
1841 /* Copy out the CRC and EOF trailer for access */
1842 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1844 fr_eof(fp) = crc_eof.fcoe_eof;
1845 fr_crc(fp) = crc_eof.fcoe_crc32;
1846 if (pskb_trim(skb, fr_len))
1849 if (!fcoe_filter_frames(lport, fp)) {
1851 fc_exch_recv(lport, fp);
1855 stats->ErrorFrames++;
1861 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1862 * @arg: The per-CPU context
1864 * Return: 0 for success
1866 static int fcoe_percpu_receive_thread(void *arg)
1868 struct fcoe_percpu_s *p = arg;
1869 struct sk_buff *skb;
1870 struct sk_buff_head tmp;
1872 skb_queue_head_init(&tmp);
1874 set_user_nice(current, MIN_NICE);
1877 while (!kthread_should_stop()) {
1879 spin_lock_bh(&p->fcoe_rx_list.lock);
1880 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1882 if (!skb_queue_len(&tmp)) {
1883 set_current_state(TASK_INTERRUPTIBLE);
1884 spin_unlock_bh(&p->fcoe_rx_list.lock);
1889 spin_unlock_bh(&p->fcoe_rx_list.lock);
1891 while ((skb = __skb_dequeue(&tmp)) != NULL)
1892 fcoe_recv_frame(skb);
1899 * fcoe_dev_setup() - Setup the link change notification interface
1901 static void fcoe_dev_setup(void)
1903 register_dcbevent_notifier(&dcb_notifier);
1904 register_netdevice_notifier(&fcoe_notifier);
1908 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1910 static void fcoe_dev_cleanup(void)
1912 unregister_dcbevent_notifier(&dcb_notifier);
1913 unregister_netdevice_notifier(&fcoe_notifier);
1916 static struct fcoe_interface *
1917 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1919 struct fcoe_interface *fcoe;
1920 struct net_device *real_dev;
1922 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1923 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1924 real_dev = vlan_dev_real_dev(fcoe->netdev);
1926 real_dev = fcoe->netdev;
1928 if (netdev == real_dev)
1934 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1935 ulong event, void *ptr)
1937 struct dcb_app_type *entry = ptr;
1938 struct fcoe_ctlr *ctlr;
1939 struct fcoe_interface *fcoe;
1940 struct net_device *netdev;
1943 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1946 netdev = dev_get_by_index(&init_net, entry->ifindex);
1950 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1955 ctlr = fcoe_to_ctlr(fcoe);
1957 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1958 prio = ffs(entry->app.priority) - 1;
1960 prio = entry->app.priority;
1965 if (entry->app.protocol == ETH_P_FIP ||
1966 entry->app.protocol == ETH_P_FCOE)
1967 ctlr->priority = prio;
1969 if (entry->app.protocol == ETH_P_FCOE)
1970 fcoe->priority = prio;
1976 * fcoe_device_notification() - Handler for net device events
1977 * @notifier: The context of the notification
1978 * @event: The type of event
1979 * @ptr: The net device that the event was on
1981 * This function is called by the Ethernet driver in case of link change event.
1983 * Returns: 0 for success
1985 static int fcoe_device_notification(struct notifier_block *notifier,
1986 ulong event, void *ptr)
1988 struct fcoe_ctlr_device *cdev;
1989 struct fc_lport *lport = NULL;
1990 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1991 struct fcoe_ctlr *ctlr;
1992 struct fcoe_interface *fcoe;
1993 struct fcoe_port *port;
1994 struct fc_stats *stats;
1995 u32 link_possible = 1;
1999 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2000 if (fcoe->netdev == netdev) {
2001 ctlr = fcoe_to_ctlr(fcoe);
2013 case NETDEV_GOING_DOWN:
2019 case NETDEV_CHANGEMTU:
2020 if (netdev->features & NETIF_F_FCOE_MTU)
2022 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
2023 sizeof(struct fcoe_crc_eof));
2024 if (mfs >= FC_MIN_MAX_FRAME)
2025 fc_set_mfs(lport, mfs);
2027 case NETDEV_REGISTER:
2029 case NETDEV_UNREGISTER:
2030 list_del(&fcoe->list);
2031 port = lport_priv(ctlr->lp);
2032 queue_work(fcoe_wq, &port->destroy_work);
2035 case NETDEV_FEAT_CHANGE:
2036 fcoe_netdev_features_change(lport, netdev);
2039 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
2040 "from netdev netlink\n", event);
2043 fcoe_link_speed_update(lport);
2045 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2047 if (link_possible && !fcoe_link_ok(lport)) {
2048 switch (cdev->enabled) {
2049 case FCOE_CTLR_DISABLED:
2050 pr_info("Link up while interface is disabled.\n");
2052 case FCOE_CTLR_ENABLED:
2053 case FCOE_CTLR_UNUSED:
2054 fcoe_ctlr_link_up(ctlr);
2056 } else if (fcoe_ctlr_link_down(ctlr)) {
2057 switch (cdev->enabled) {
2058 case FCOE_CTLR_DISABLED:
2059 pr_info("Link down while interface is disabled.\n");
2061 case FCOE_CTLR_ENABLED:
2062 case FCOE_CTLR_UNUSED:
2063 stats = per_cpu_ptr(lport->stats, get_cpu());
2064 stats->LinkFailureCount++;
2066 fcoe_clean_pending_queue(lport);
2074 * fcoe_disable() - Disables a FCoE interface
2075 * @netdev : The net_device object the Ethernet interface to create on
2077 * Called from fcoe transport.
2079 * Returns: 0 for success
2081 * Deprecated: use fcoe_ctlr_enabled()
2083 static int fcoe_disable(struct net_device *netdev)
2085 struct fcoe_ctlr *ctlr;
2086 struct fcoe_interface *fcoe;
2089 mutex_lock(&fcoe_config_mutex);
2092 fcoe = fcoe_hostlist_lookup_port(netdev);
2096 ctlr = fcoe_to_ctlr(fcoe);
2097 fcoe_ctlr_link_down(ctlr);
2098 fcoe_clean_pending_queue(ctlr->lp);
2102 mutex_unlock(&fcoe_config_mutex);
2107 * fcoe_enable() - Enables a FCoE interface
2108 * @netdev : The net_device object the Ethernet interface to create on
2110 * Called from fcoe transport.
2112 * Returns: 0 for success
2114 static int fcoe_enable(struct net_device *netdev)
2116 struct fcoe_ctlr *ctlr;
2117 struct fcoe_interface *fcoe;
2120 mutex_lock(&fcoe_config_mutex);
2122 fcoe = fcoe_hostlist_lookup_port(netdev);
2130 ctlr = fcoe_to_ctlr(fcoe);
2132 if (!fcoe_link_ok(ctlr->lp))
2133 fcoe_ctlr_link_up(ctlr);
2136 mutex_unlock(&fcoe_config_mutex);
2141 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
2142 * @cdev: The FCoE Controller that is being enabled or disabled
2144 * fcoe_sysfs will ensure that the state of 'enabled' has
2145 * changed, so no checking is necessary here. This routine simply
2146 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
2147 * When those routines are removed the functionality can be merged
2150 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
2152 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
2153 struct fc_lport *lport = ctlr->lp;
2154 struct net_device *netdev = fcoe_netdev(lport);
2156 switch (cdev->enabled) {
2157 case FCOE_CTLR_ENABLED:
2158 return fcoe_enable(netdev);
2159 case FCOE_CTLR_DISABLED:
2160 return fcoe_disable(netdev);
2161 case FCOE_CTLR_UNUSED:
2168 * fcoe_destroy() - Destroy a FCoE interface
2169 * @netdev : The net_device object the Ethernet interface to create on
2171 * Called from fcoe transport
2173 * Returns: 0 for success
2175 static int fcoe_destroy(struct net_device *netdev)
2177 struct fcoe_ctlr *ctlr;
2178 struct fcoe_interface *fcoe;
2179 struct fc_lport *lport;
2180 struct fcoe_port *port;
2183 mutex_lock(&fcoe_config_mutex);
2185 fcoe = fcoe_hostlist_lookup_port(netdev);
2190 ctlr = fcoe_to_ctlr(fcoe);
2192 port = lport_priv(lport);
2193 list_del(&fcoe->list);
2194 queue_work(fcoe_wq, &port->destroy_work);
2197 mutex_unlock(&fcoe_config_mutex);
2202 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2203 * @work: Handle to the FCoE port to be destroyed
2205 static void fcoe_destroy_work(struct work_struct *work)
2207 struct fcoe_ctlr_device *cdev;
2208 struct fcoe_ctlr *ctlr;
2209 struct fcoe_port *port;
2210 struct fcoe_interface *fcoe;
2211 struct Scsi_Host *shost;
2212 struct fc_host_attrs *fc_host;
2213 unsigned long flags;
2214 struct fc_vport *vport;
2215 struct fc_vport *next_vport;
2217 port = container_of(work, struct fcoe_port, destroy_work);
2218 shost = port->lport->host;
2219 fc_host = shost_to_fc_host(shost);
2221 /* Loop through all the vports and mark them for deletion */
2222 spin_lock_irqsave(shost->host_lock, flags);
2223 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2224 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2227 vport->flags |= FC_VPORT_DELETING;
2228 queue_work(fc_host_work_q(shost),
2229 &vport->vport_delete_work);
2232 spin_unlock_irqrestore(shost->host_lock, flags);
2234 flush_workqueue(fc_host_work_q(shost));
2236 mutex_lock(&fcoe_config_mutex);
2239 ctlr = fcoe_to_ctlr(fcoe);
2240 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2242 fcoe_if_destroy(port->lport);
2243 fcoe_interface_cleanup(fcoe);
2245 mutex_unlock(&fcoe_config_mutex);
2247 fcoe_ctlr_device_delete(cdev);
2251 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2252 * @netdev : The net_device object the Ethernet interface to create on
2254 * Called from fcoe transport.
2256 * Returns: always returns true as this is the default FCoE transport,
2257 * i.e., support all netdevs.
2259 static bool fcoe_match(struct net_device *netdev)
2265 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2266 * @netdev: The net_device object of the L2 link that should be queried
2267 * @port: The fcoe_port to bind FCoE APP priority with
2270 static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2275 struct net_device *netdev = fcoe->realdev;
2276 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2277 struct dcb_app app = {
2279 .protocol = ETH_P_FCOE
2282 /* setup DCB priority attributes. */
2283 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2284 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2286 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2287 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2288 up = dcb_ieee_getapp_mask(netdev, &app);
2289 app.protocol = ETH_P_FIP;
2290 fup = dcb_ieee_getapp_mask(netdev, &app);
2292 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2293 up = dcb_getapp(netdev, &app);
2294 app.protocol = ETH_P_FIP;
2295 fup = dcb_getapp(netdev, &app);
2298 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0;
2299 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority;
2304 enum fcoe_create_link_state {
2305 FCOE_CREATE_LINK_DOWN,
2306 FCOE_CREATE_LINK_UP,
2310 * _fcoe_create() - (internal) Create a fcoe interface
2311 * @netdev : The net_device object the Ethernet interface to create on
2312 * @fip_mode: The FIP mode for this creation
2313 * @link_state: The ctlr link state on creation
2315 * Called from either the libfcoe 'create' module parameter
2316 * via fcoe_create or from fcoe_syfs's ctlr_create file.
2318 * libfcoe's 'create' module parameter is deprecated so some
2319 * consolidation of code can be done when that interface is
2322 static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode,
2323 enum fcoe_create_link_state link_state)
2326 struct fcoe_ctlr_device *ctlr_dev;
2327 struct fcoe_ctlr *ctlr;
2328 struct fcoe_interface *fcoe;
2329 struct fc_lport *lport;
2331 mutex_lock(&fcoe_config_mutex);
2334 /* look for existing lport */
2335 if (fcoe_hostlist_lookup(netdev)) {
2340 fcoe = fcoe_interface_create(netdev, fip_mode);
2346 ctlr = fcoe_to_ctlr(fcoe);
2347 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2348 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
2349 if (IS_ERR(lport)) {
2350 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2354 fcoe_interface_cleanup(fcoe);
2355 mutex_unlock(&fcoe_config_mutex);
2356 fcoe_ctlr_device_delete(ctlr_dev);
2360 /* Make this the "master" N_Port */
2363 /* setup DCB priority attributes. */
2364 fcoe_dcb_create(fcoe);
2366 /* start FIP Discovery and FLOGI */
2367 lport->boot_time = jiffies;
2368 fc_fabric_login(lport);
2371 * If the fcoe_ctlr_device is to be set to DISABLED
2372 * it must be done after the lport is added to the
2373 * hostlist, but before the rtnl_lock is released.
2374 * This is because the rtnl_lock protects the
2375 * hostlist that fcoe_device_notification uses. If
2376 * the FCoE Controller is intended to be created
2377 * DISABLED then 'enabled' needs to be considered
2378 * handling link events. 'enabled' must be set
2379 * before the lport can be found in the hostlist
2380 * when a link up event is received.
2382 if (link_state == FCOE_CREATE_LINK_UP)
2383 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2385 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2387 if (link_state == FCOE_CREATE_LINK_UP &&
2388 !fcoe_link_ok(lport)) {
2390 fcoe_ctlr_link_up(ctlr);
2391 mutex_unlock(&fcoe_config_mutex);
2397 mutex_unlock(&fcoe_config_mutex);
2403 * fcoe_create() - Create a fcoe interface
2404 * @netdev : The net_device object the Ethernet interface to create on
2405 * @fip_mode: The FIP mode for this creation
2407 * Called from fcoe transport
2409 * Returns: 0 for success
2411 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
2413 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2417 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2418 * @netdev: The net_device to be used by the allocated FCoE Controller
2420 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2421 * in a link_down state. The allows the user an opportunity to configure
2422 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2424 * Creating in with this routine starts the FCoE Controller in Fabric
2425 * mode. The user can change to VN2VN or another mode before enabling.
2427 static int fcoe_ctlr_alloc(struct net_device *netdev)
2429 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2430 FCOE_CREATE_LINK_DOWN);
2434 * fcoe_link_ok() - Check if the link is OK for a local port
2435 * @lport: The local port to check link on
2437 * Returns: 0 if link is UP and OK, -1 if not
2440 static int fcoe_link_ok(struct fc_lport *lport)
2442 struct net_device *netdev = fcoe_netdev(lport);
2444 if (netif_oper_up(netdev))
2450 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2451 * @lport: The local port whose skbs are to be cleared
2453 * Must be called with fcoe_create_mutex held to single-thread completion.
2455 * This flushes the pending skbs by adding a new skb to each queue and
2456 * waiting until they are all freed. This assures us that not only are
2457 * there no packets that will be handled by the lport, but also that any
2458 * threads already handling packet have returned.
2460 static void fcoe_percpu_clean(struct fc_lport *lport)
2462 struct fcoe_percpu_s *pp;
2463 struct sk_buff *skb;
2466 for_each_possible_cpu(cpu) {
2467 pp = &per_cpu(fcoe_percpu, cpu);
2469 if (!pp->thread || !cpu_online(cpu))
2472 skb = dev_alloc_skb(0);
2476 skb->destructor = fcoe_percpu_flush_done;
2478 spin_lock_bh(&pp->fcoe_rx_list.lock);
2479 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2480 if (pp->fcoe_rx_list.qlen == 1)
2481 wake_up_process(pp->thread);
2482 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2484 wait_for_completion(&fcoe_flush_completion);
2489 * fcoe_reset() - Reset a local port
2490 * @shost: The SCSI host associated with the local port to be reset
2492 * Returns: Always 0 (return value required by FC transport template)
2494 static int fcoe_reset(struct Scsi_Host *shost)
2496 struct fc_lport *lport = shost_priv(shost);
2497 struct fcoe_port *port = lport_priv(lport);
2498 struct fcoe_interface *fcoe = port->priv;
2499 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2500 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2502 fcoe_ctlr_link_down(ctlr);
2503 fcoe_clean_pending_queue(ctlr->lp);
2505 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2506 !fcoe_link_ok(ctlr->lp))
2507 fcoe_ctlr_link_up(ctlr);
2512 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2513 * @netdev: The net device used as a key
2515 * Locking: Must be called with the RNL mutex held.
2517 * Returns: NULL or the FCoE interface
2519 static struct fcoe_interface *
2520 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2522 struct fcoe_interface *fcoe;
2524 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2525 if (fcoe->netdev == netdev)
2532 * fcoe_hostlist_lookup() - Find the local port associated with a
2534 * @netdev: The netdevice used as a key
2536 * Locking: Must be called with the RTNL mutex held
2538 * Returns: NULL or the local port
2540 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2542 struct fcoe_ctlr *ctlr;
2543 struct fcoe_interface *fcoe;
2545 fcoe = fcoe_hostlist_lookup_port(netdev);
2546 ctlr = fcoe_to_ctlr(fcoe);
2547 return (fcoe) ? ctlr->lp : NULL;
2551 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2552 * port to the hostlist
2553 * @lport: The local port that identifies the FCoE interface to be added
2555 * Locking: must be called with the RTNL mutex held
2557 * Returns: 0 for success
2559 static int fcoe_hostlist_add(const struct fc_lport *lport)
2561 struct fcoe_interface *fcoe;
2562 struct fcoe_port *port;
2564 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2566 port = lport_priv(lport);
2568 list_add_tail(&fcoe->list, &fcoe_hostlist);
2574 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2575 * port to the hostlist
2576 * @lport: The local port that identifies the FCoE interface to be added
2578 * Locking: must be called with the RTNL mutex held
2581 static void fcoe_hostlist_del(const struct fc_lport *lport)
2583 struct fcoe_interface *fcoe;
2584 struct fcoe_port *port;
2586 port = lport_priv(lport);
2588 list_del(&fcoe->list);
2592 static struct fcoe_transport fcoe_sw_transport = {
2593 .name = {FCOE_TRANSPORT_DEFAULT},
2595 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2596 .match = fcoe_match,
2597 .alloc = fcoe_ctlr_alloc,
2598 .create = fcoe_create,
2599 .destroy = fcoe_destroy,
2600 .enable = fcoe_enable,
2601 .disable = fcoe_disable,
2605 * fcoe_init() - Initialize fcoe.ko
2607 * Returns: 0 on success, or a negative value on failure
2609 static int __init fcoe_init(void)
2611 struct fcoe_percpu_s *p;
2615 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2619 /* register as a fcoe transport */
2620 rc = fcoe_transport_attach(&fcoe_sw_transport);
2622 printk(KERN_ERR "failed to register an fcoe transport, check "
2623 "if libfcoe is loaded\n");
2627 mutex_lock(&fcoe_config_mutex);
2629 for_each_possible_cpu(cpu) {
2630 p = &per_cpu(fcoe_percpu, cpu);
2631 skb_queue_head_init(&p->fcoe_rx_list);
2634 cpu_notifier_register_begin();
2636 for_each_online_cpu(cpu)
2637 fcoe_percpu_thread_create(cpu);
2639 /* Initialize per CPU interrupt thread */
2640 rc = __register_hotcpu_notifier(&fcoe_cpu_notifier);
2644 cpu_notifier_register_done();
2646 /* Setup link change notification */
2649 rc = fcoe_if_init();
2653 mutex_unlock(&fcoe_config_mutex);
2657 for_each_online_cpu(cpu) {
2658 fcoe_percpu_thread_destroy(cpu);
2661 cpu_notifier_register_done();
2663 mutex_unlock(&fcoe_config_mutex);
2664 destroy_workqueue(fcoe_wq);
2667 module_init(fcoe_init);
2670 * fcoe_exit() - Clean up fcoe.ko
2672 * Returns: 0 on success or a negative value on failure
2674 static void __exit fcoe_exit(void)
2676 struct fcoe_interface *fcoe, *tmp;
2677 struct fcoe_ctlr *ctlr;
2678 struct fcoe_port *port;
2681 mutex_lock(&fcoe_config_mutex);
2685 /* releases the associated fcoe hosts */
2687 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2688 ctlr = fcoe_to_ctlr(fcoe);
2689 port = lport_priv(ctlr->lp);
2690 fcoe_hostlist_del(port->lport);
2691 queue_work(fcoe_wq, &port->destroy_work);
2695 cpu_notifier_register_begin();
2697 for_each_online_cpu(cpu)
2698 fcoe_percpu_thread_destroy(cpu);
2700 __unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2702 cpu_notifier_register_done();
2704 mutex_unlock(&fcoe_config_mutex);
2707 * destroy_work's may be chained but destroy_workqueue()
2708 * can take care of them. Just kill the fcoe_wq.
2710 destroy_workqueue(fcoe_wq);
2713 * Detaching from the scsi transport must happen after all
2714 * destroys are done on the fcoe_wq. destroy_workqueue will
2715 * enusre the fcoe_wq is flushed.
2719 /* detach from fcoe transport */
2720 fcoe_transport_detach(&fcoe_sw_transport);
2722 module_exit(fcoe_exit);
2725 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2726 * @seq: active sequence in the FLOGI or FDISC exchange
2727 * @fp: response frame, or error encoded in a pointer (timeout)
2728 * @arg: pointer the the fcoe_ctlr structure
2730 * This handles MAC address management for FCoE, then passes control on to
2731 * the libfc FLOGI response handler.
2733 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2735 struct fcoe_ctlr *fip = arg;
2736 struct fc_exch *exch = fc_seq_exch(seq);
2737 struct fc_lport *lport = exch->lp;
2743 mac = fr_cb(fp)->granted_mac;
2745 if (is_zero_ether_addr(mac))
2746 fcoe_ctlr_recv_flogi(fip, lport, fp);
2747 if (!is_zero_ether_addr(mac))
2748 fcoe_update_src_mac(lport, mac);
2750 fc_lport_flogi_resp(seq, fp, lport);
2754 * fcoe_logo_resp() - FCoE specific LOGO response handler
2755 * @seq: active sequence in the LOGO exchange
2756 * @fp: response frame, or error encoded in a pointer (timeout)
2757 * @arg: pointer the the fcoe_ctlr structure
2759 * This handles MAC address management for FCoE, then passes control on to
2760 * the libfc LOGO response handler.
2762 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2764 struct fc_lport *lport = arg;
2765 static u8 zero_mac[ETH_ALEN] = { 0 };
2768 fcoe_update_src_mac(lport, zero_mac);
2769 fc_lport_logo_resp(seq, fp, lport);
2773 * fcoe_elsct_send - FCoE specific ELS handler
2775 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2776 * using FCoE specific response handlers and passing the FIP controller as
2777 * the argument (the lport is still available from the exchange).
2779 * Most of the work here is just handed off to the libfc routine.
2781 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2782 struct fc_frame *fp, unsigned int op,
2783 void (*resp)(struct fc_seq *,
2786 void *arg, u32 timeout)
2788 struct fcoe_port *port = lport_priv(lport);
2789 struct fcoe_interface *fcoe = port->priv;
2790 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
2791 struct fc_frame_header *fh = fc_frame_header_get(fp);
2796 if (lport->point_to_multipoint)
2798 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2801 /* only hook onto fabric logouts, not port logouts */
2802 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2804 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2807 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2811 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2812 * @vport: fc_vport object to create a new fc_host for
2813 * @disabled: start the new fc_host in a disabled state by default?
2815 * Returns: 0 for success
2817 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2819 struct Scsi_Host *shost = vport_to_shost(vport);
2820 struct fc_lport *n_port = shost_priv(shost);
2821 struct fcoe_port *port = lport_priv(n_port);
2822 struct fcoe_interface *fcoe = port->priv;
2823 struct net_device *netdev = fcoe->netdev;
2824 struct fc_lport *vn_port;
2828 rc = fcoe_validate_vport_create(vport);
2830 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2831 printk(KERN_ERR "fcoe: Failed to create vport, "
2832 "WWPN (0x%s) already exists\n",
2837 mutex_lock(&fcoe_config_mutex);
2839 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2841 mutex_unlock(&fcoe_config_mutex);
2843 if (IS_ERR(vn_port)) {
2844 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2850 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2852 vn_port->boot_time = jiffies;
2853 fc_fabric_login(vn_port);
2854 fc_vport_setlink(vn_port);
2860 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2861 * @vport: fc_vport object that is being destroyed
2863 * Returns: 0 for success
2865 static int fcoe_vport_destroy(struct fc_vport *vport)
2867 struct Scsi_Host *shost = vport_to_shost(vport);
2868 struct fc_lport *n_port = shost_priv(shost);
2869 struct fc_lport *vn_port = vport->dd_data;
2871 mutex_lock(&n_port->lp_mutex);
2872 list_del(&vn_port->list);
2873 mutex_unlock(&n_port->lp_mutex);
2875 mutex_lock(&fcoe_config_mutex);
2876 fcoe_if_destroy(vn_port);
2877 mutex_unlock(&fcoe_config_mutex);
2883 * fcoe_vport_disable() - change vport state
2884 * @vport: vport to bring online/offline
2885 * @disable: should the vport be disabled?
2887 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2889 struct fc_lport *lport = vport->dd_data;
2892 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2893 fc_fabric_logoff(lport);
2895 lport->boot_time = jiffies;
2896 fc_fabric_login(lport);
2897 fc_vport_setlink(lport);
2904 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2905 * @vport: fc_vport with a new symbolic name string
2907 * After generating a new symbolic name string, a new RSPN_ID request is
2908 * sent to the name server. There is no response handler, so if it fails
2909 * for some reason it will not be retried.
2911 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2913 struct fc_lport *lport = vport->dd_data;
2914 struct fc_frame *fp;
2917 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2918 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2919 fcoe_netdev(lport)->name, vport->symbolic_name);
2921 if (lport->state != LPORT_ST_READY)
2924 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2925 fp = fc_frame_alloc(lport,
2926 sizeof(struct fc_ct_hdr) +
2927 sizeof(struct fc_ns_rspn) + len);
2930 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2931 NULL, NULL, 3 * lport->r_a_tov);
2934 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2936 struct fcoe_ctlr_device *ctlr_dev =
2937 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2938 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2939 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2941 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2945 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2946 * @lport: the local port
2947 * @port_id: the port ID
2948 * @fp: the received frame, if any, that caused the port_id to be set.
2950 * This routine handles the case where we received a FLOGI and are
2951 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2952 * so it can set the non-mapped mode and gateway address.
2954 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2956 static void fcoe_set_port_id(struct fc_lport *lport,
2957 u32 port_id, struct fc_frame *fp)
2959 struct fcoe_port *port = lport_priv(lport);
2960 struct fcoe_interface *fcoe = port->priv;
2961 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2963 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2964 fcoe_ctlr_recv_flogi(ctlr, lport, fp);