2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
20 #include <linux/module.h>
21 #include <linux/spinlock.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/if_ether.h>
26 #include <linux/if_vlan.h>
27 #include <linux/crc32.h>
28 #include <linux/slab.h>
29 #include <linux/cpu.h>
31 #include <linux/sysfs.h>
32 #include <linux/ctype.h>
33 #include <linux/workqueue.h>
34 #include <net/dcbnl.h>
35 #include <net/dcbevent.h>
36 #include <scsi/scsi_tcq.h>
37 #include <scsi/scsicam.h>
38 #include <scsi/scsi_transport.h>
39 #include <scsi/scsi_transport_fc.h>
40 #include <net/rtnetlink.h>
42 #include <scsi/fc/fc_encaps.h>
43 #include <scsi/fc/fc_fip.h>
44 #include <scsi/fc/fc_fcoe.h>
46 #include <scsi/libfc.h>
47 #include <scsi/fc_frame.h>
48 #include <scsi/libfcoe.h>
52 MODULE_AUTHOR("Open-FCoE.org");
53 MODULE_DESCRIPTION("FCoE");
54 MODULE_LICENSE("GPL v2");
56 /* Performance tuning parameters for fcoe */
57 static unsigned int fcoe_ddp_min = 4096;
58 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
59 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
60 "Direct Data Placement (DDP).");
62 unsigned int fcoe_debug_logging;
63 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
64 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
66 static DEFINE_MUTEX(fcoe_config_mutex);
68 static struct workqueue_struct *fcoe_wq;
71 /* must only by accessed under the RTNL mutex */
72 static LIST_HEAD(fcoe_hostlist);
73 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
75 /* Function Prototypes */
76 static int fcoe_reset(struct Scsi_Host *);
77 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
78 static int fcoe_rcv(struct sk_buff *, struct net_device *,
79 struct packet_type *, struct net_device *);
80 static void fcoe_percpu_clean(struct fc_lport *);
81 static int fcoe_link_ok(struct fc_lport *);
83 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
84 static int fcoe_hostlist_add(const struct fc_lport *);
85 static void fcoe_hostlist_del(const struct fc_lport *);
87 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
88 static void fcoe_dev_setup(void);
89 static void fcoe_dev_cleanup(void);
90 static struct fcoe_interface
91 *fcoe_hostlist_lookup_port(const struct net_device *);
93 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
94 struct packet_type *, struct net_device *);
96 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
97 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
98 static u8 *fcoe_get_src_mac(struct fc_lport *);
99 static void fcoe_destroy_work(struct work_struct *);
101 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
103 static int fcoe_ddp_done(struct fc_lport *, u16);
104 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
106 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
107 ulong event, void *ptr);
109 static bool fcoe_match(struct net_device *netdev);
110 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode);
111 static int fcoe_destroy(struct net_device *netdev);
112 static int fcoe_enable(struct net_device *netdev);
113 static int fcoe_disable(struct net_device *netdev);
115 /* fcoe_syfs control interface handlers */
116 static int fcoe_ctlr_alloc(struct net_device *netdev);
117 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
118 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev);
120 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
121 u32 did, struct fc_frame *,
123 void (*resp)(struct fc_seq *,
126 void *, u32 timeout);
127 static void fcoe_recv_frame(struct sk_buff *skb);
129 /* notification function for packets from net device */
130 static struct notifier_block fcoe_notifier = {
131 .notifier_call = fcoe_device_notification,
134 /* notification function for DCB events */
135 static struct notifier_block dcb_notifier = {
136 .notifier_call = fcoe_dcb_app_notification,
139 static struct scsi_transport_template *fcoe_nport_scsi_transport;
140 static struct scsi_transport_template *fcoe_vport_scsi_transport;
142 static int fcoe_vport_destroy(struct fc_vport *);
143 static int fcoe_vport_create(struct fc_vport *, bool disabled);
144 static int fcoe_vport_disable(struct fc_vport *, bool disable);
145 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
146 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
147 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
150 static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
151 .set_fcoe_ctlr_mode = fcoe_ctlr_mode,
152 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
153 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
154 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
155 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
156 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
157 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
158 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
160 .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
161 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
164 static struct libfc_function_template fcoe_libfc_fcn_templ = {
165 .frame_send = fcoe_xmit,
166 .ddp_setup = fcoe_ddp_setup,
167 .ddp_done = fcoe_ddp_done,
168 .ddp_target = fcoe_ddp_target,
169 .elsct_send = fcoe_elsct_send,
170 .get_lesb = fcoe_get_lesb,
171 .lport_set_port_id = fcoe_set_port_id,
174 static struct fc_function_template fcoe_nport_fc_functions = {
175 .show_host_node_name = 1,
176 .show_host_port_name = 1,
177 .show_host_supported_classes = 1,
178 .show_host_supported_fc4s = 1,
179 .show_host_active_fc4s = 1,
180 .show_host_maxframe_size = 1,
181 .show_host_serial_number = 1,
182 .show_host_manufacturer = 1,
183 .show_host_model = 1,
184 .show_host_model_description = 1,
185 .show_host_hardware_version = 1,
186 .show_host_driver_version = 1,
187 .show_host_firmware_version = 1,
188 .show_host_optionrom_version = 1,
190 .show_host_port_id = 1,
191 .show_host_supported_speeds = 1,
192 .get_host_speed = fc_get_host_speed,
193 .show_host_speed = 1,
194 .show_host_port_type = 1,
195 .get_host_port_state = fc_get_host_port_state,
196 .show_host_port_state = 1,
197 .show_host_symbolic_name = 1,
199 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
200 .show_rport_maxframe_size = 1,
201 .show_rport_supported_classes = 1,
203 .show_host_fabric_name = 1,
204 .show_starget_node_name = 1,
205 .show_starget_port_name = 1,
206 .show_starget_port_id = 1,
207 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
208 .show_rport_dev_loss_tmo = 1,
209 .get_fc_host_stats = fc_get_host_stats,
210 .issue_fc_host_lip = fcoe_reset,
212 .terminate_rport_io = fc_rport_terminate_io,
214 .vport_create = fcoe_vport_create,
215 .vport_delete = fcoe_vport_destroy,
216 .vport_disable = fcoe_vport_disable,
217 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
219 .bsg_request = fc_lport_bsg_request,
222 static struct fc_function_template fcoe_vport_fc_functions = {
223 .show_host_node_name = 1,
224 .show_host_port_name = 1,
225 .show_host_supported_classes = 1,
226 .show_host_supported_fc4s = 1,
227 .show_host_active_fc4s = 1,
228 .show_host_maxframe_size = 1,
229 .show_host_serial_number = 1,
230 .show_host_manufacturer = 1,
231 .show_host_model = 1,
232 .show_host_model_description = 1,
233 .show_host_hardware_version = 1,
234 .show_host_driver_version = 1,
235 .show_host_firmware_version = 1,
236 .show_host_optionrom_version = 1,
238 .show_host_port_id = 1,
239 .show_host_supported_speeds = 1,
240 .get_host_speed = fc_get_host_speed,
241 .show_host_speed = 1,
242 .show_host_port_type = 1,
243 .get_host_port_state = fc_get_host_port_state,
244 .show_host_port_state = 1,
245 .show_host_symbolic_name = 1,
247 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
248 .show_rport_maxframe_size = 1,
249 .show_rport_supported_classes = 1,
251 .show_host_fabric_name = 1,
252 .show_starget_node_name = 1,
253 .show_starget_port_name = 1,
254 .show_starget_port_id = 1,
255 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
256 .show_rport_dev_loss_tmo = 1,
257 .get_fc_host_stats = fc_get_host_stats,
258 .issue_fc_host_lip = fcoe_reset,
260 .terminate_rport_io = fc_rport_terminate_io,
262 .bsg_request = fc_lport_bsg_request,
265 static struct scsi_host_template fcoe_shost_template = {
266 .module = THIS_MODULE,
267 .name = "FCoE Driver",
268 .proc_name = FCOE_NAME,
269 .queuecommand = fc_queuecommand,
270 .eh_abort_handler = fc_eh_abort,
271 .eh_device_reset_handler = fc_eh_device_reset,
272 .eh_host_reset_handler = fc_eh_host_reset,
273 .slave_alloc = fc_slave_alloc,
274 .change_queue_depth = scsi_change_queue_depth,
277 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
278 .use_clustering = ENABLE_CLUSTERING,
279 .sg_tablesize = SG_ALL,
280 .max_sectors = 0xffff,
281 .track_queue_depth = 1,
285 * fcoe_interface_setup() - Setup a FCoE interface
286 * @fcoe: The new FCoE interface
287 * @netdev: The net device that the fcoe interface is on
289 * Returns : 0 for success
290 * Locking: must be called with the RTNL mutex held
292 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
293 struct net_device *netdev)
295 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
296 struct netdev_hw_addr *ha;
297 struct net_device *real_dev;
298 u8 flogi_maddr[ETH_ALEN];
299 const struct net_device_ops *ops;
301 fcoe->netdev = netdev;
303 /* Let LLD initialize for FCoE */
304 ops = netdev->netdev_ops;
305 if (ops->ndo_fcoe_enable) {
306 if (ops->ndo_fcoe_enable(netdev))
307 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
308 " specific feature for LLD.\n");
311 /* Do not support for bonding device */
312 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
313 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
317 /* look for SAN MAC address, if multiple SAN MACs exist, only
318 * use the first one for SPMA */
319 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
320 vlan_dev_real_dev(netdev) : netdev;
321 fcoe->realdev = real_dev;
323 for_each_dev_addr(real_dev, ha) {
324 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
325 (is_valid_ether_addr(ha->addr))) {
326 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
333 /* setup Source Mac Address */
335 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
338 * Add FCoE MAC address as second unicast MAC address
339 * or enter promiscuous mode if not capable of listening
340 * for multiple unicast MACs.
342 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
343 dev_uc_add(netdev, flogi_maddr);
345 dev_uc_add(netdev, fip->ctl_src_addr);
346 if (fip->mode == FIP_MODE_VN2VN) {
347 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
348 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
350 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
353 * setup the receive function from ethernet driver
354 * on the ethertype for the given device
356 fcoe->fcoe_packet_type.func = fcoe_rcv;
357 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);
358 fcoe->fcoe_packet_type.dev = netdev;
359 dev_add_pack(&fcoe->fcoe_packet_type);
361 fcoe->fip_packet_type.func = fcoe_fip_recv;
362 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
363 fcoe->fip_packet_type.dev = netdev;
364 dev_add_pack(&fcoe->fip_packet_type);
370 * fcoe_interface_create() - Create a FCoE interface on a net device
371 * @netdev: The net device to create the FCoE interface on
372 * @fip_mode: The mode to use for FIP
374 * Returns: pointer to a struct fcoe_interface or NULL on error
376 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
377 enum fip_state fip_mode)
379 struct fcoe_ctlr_device *ctlr_dev;
380 struct fcoe_ctlr *ctlr;
381 struct fcoe_interface *fcoe;
385 if (!try_module_get(THIS_MODULE)) {
386 FCOE_NETDEV_DBG(netdev,
387 "Could not get a reference to the module\n");
388 fcoe = ERR_PTR(-EBUSY);
392 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
393 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
396 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
397 fcoe = ERR_PTR(-ENOMEM);
401 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
402 ctlr->cdev = ctlr_dev;
403 fcoe = fcoe_ctlr_priv(ctlr);
410 fcoe_ctlr_init(ctlr, fip_mode);
411 ctlr->send = fcoe_fip_send;
412 ctlr->update_mac = fcoe_update_src_mac;
413 ctlr->get_src_addr = fcoe_get_src_mac;
415 err = fcoe_interface_setup(fcoe, netdev);
417 fcoe_ctlr_destroy(ctlr);
418 fcoe_ctlr_device_delete(ctlr_dev);
427 module_put(THIS_MODULE);
433 * fcoe_interface_remove() - remove FCoE interface from netdev
434 * @fcoe: The FCoE interface to be cleaned up
436 * Caller must be holding the RTNL mutex
438 static void fcoe_interface_remove(struct fcoe_interface *fcoe)
440 struct net_device *netdev = fcoe->netdev;
441 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
442 u8 flogi_maddr[ETH_ALEN];
443 const struct net_device_ops *ops;
446 * Don't listen for Ethernet packets anymore.
447 * synchronize_net() ensures that the packet handlers are not running
448 * on another CPU. dev_remove_pack() would do that, this calls the
449 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
451 __dev_remove_pack(&fcoe->fcoe_packet_type);
452 __dev_remove_pack(&fcoe->fip_packet_type);
455 /* Delete secondary MAC addresses */
456 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
457 dev_uc_del(netdev, flogi_maddr);
459 dev_uc_del(netdev, fip->ctl_src_addr);
460 if (fip->mode == FIP_MODE_VN2VN) {
461 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
462 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
464 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
466 /* Tell the LLD we are done w/ FCoE */
467 ops = netdev->netdev_ops;
468 if (ops->ndo_fcoe_disable) {
469 if (ops->ndo_fcoe_disable(netdev))
470 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
471 " specific feature for LLD.\n");
478 * fcoe_interface_cleanup() - Clean up a FCoE interface
479 * @fcoe: The FCoE interface to be cleaned up
481 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
483 struct net_device *netdev = fcoe->netdev;
484 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
488 fcoe_interface_remove(fcoe);
491 /* Release the self-reference taken during fcoe_interface_create() */
492 /* tear-down the FCoE controller */
493 fcoe_ctlr_destroy(fip);
494 scsi_host_put(fip->lp->host);
496 module_put(THIS_MODULE);
500 * fcoe_fip_recv() - Handler for received FIP frames
501 * @skb: The receive skb
502 * @netdev: The associated net device
503 * @ptype: The packet_type structure which was used to register this handler
504 * @orig_dev: The original net_device the the skb was received on.
505 * (in case dev is a bond)
507 * Returns: 0 for success
509 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
510 struct packet_type *ptype,
511 struct net_device *orig_dev)
513 struct fcoe_interface *fcoe;
514 struct fcoe_ctlr *ctlr;
516 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
517 ctlr = fcoe_to_ctlr(fcoe);
518 fcoe_ctlr_recv(ctlr, skb);
523 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
524 * @port: The FCoE port
525 * @skb: The FIP/FCoE packet to be sent
527 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
529 if (port->fcoe_pending_queue.qlen)
530 fcoe_check_wait_queue(port->lport, skb);
531 else if (fcoe_start_io(skb))
532 fcoe_check_wait_queue(port->lport, skb);
536 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
537 * @fip: The FCoE controller
538 * @skb: The FIP packet to be sent
540 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
542 skb->dev = fcoe_from_ctlr(fip)->netdev;
543 fcoe_port_send(lport_priv(fip->lp), skb);
547 * fcoe_update_src_mac() - Update the Ethernet MAC filters
548 * @lport: The local port to update the source MAC on
549 * @addr: Unicast MAC address to add
551 * Remove any previously-set unicast MAC filter.
552 * Add secondary FCoE MAC address filter for our OUI.
554 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
556 struct fcoe_port *port = lport_priv(lport);
557 struct fcoe_interface *fcoe = port->priv;
559 if (!is_zero_ether_addr(port->data_src_addr))
560 dev_uc_del(fcoe->netdev, port->data_src_addr);
561 if (!is_zero_ether_addr(addr))
562 dev_uc_add(fcoe->netdev, addr);
563 memcpy(port->data_src_addr, addr, ETH_ALEN);
567 * fcoe_get_src_mac() - return the Ethernet source address for an lport
568 * @lport: libfc lport
570 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
572 struct fcoe_port *port = lport_priv(lport);
574 return port->data_src_addr;
578 * fcoe_lport_config() - Set up a local port
579 * @lport: The local port to be setup
581 * Returns: 0 for success
583 static int fcoe_lport_config(struct fc_lport *lport)
587 lport->max_retry_count = 3;
588 lport->max_rport_retry_count = 3;
589 lport->e_d_tov = 2 * 1000; /* FC-FS default */
590 lport->r_a_tov = 2 * 2 * 1000;
591 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
592 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
593 lport->does_npiv = 1;
595 fc_lport_init_stats(lport);
597 /* lport fc_lport related configuration */
598 fc_lport_config(lport);
600 /* offload related configuration */
601 lport->crc_offload = 0;
602 lport->seq_offload = 0;
603 lport->lro_enabled = 0;
611 * fcoe_netdev_features_change - Updates the lport's offload flags based
612 * on the LLD netdev's FCoE feature flags
614 static void fcoe_netdev_features_change(struct fc_lport *lport,
615 struct net_device *netdev)
617 mutex_lock(&lport->lp_mutex);
619 if (netdev->features & NETIF_F_SG)
624 if (netdev->features & NETIF_F_FCOE_CRC) {
625 lport->crc_offload = 1;
626 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
628 lport->crc_offload = 0;
631 if (netdev->features & NETIF_F_FSO) {
632 lport->seq_offload = 1;
633 lport->lso_max = netdev->gso_max_size;
634 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
637 lport->seq_offload = 0;
641 if (netdev->fcoe_ddp_xid) {
642 lport->lro_enabled = 1;
643 lport->lro_xid = netdev->fcoe_ddp_xid;
644 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
647 lport->lro_enabled = 0;
651 mutex_unlock(&lport->lp_mutex);
655 * fcoe_netdev_config() - Set up net devive for SW FCoE
656 * @lport: The local port that is associated with the net device
657 * @netdev: The associated net device
659 * Must be called after fcoe_lport_config() as it will use local port mutex
661 * Returns: 0 for success
663 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
667 struct fcoe_interface *fcoe;
668 struct fcoe_ctlr *ctlr;
669 struct fcoe_port *port;
671 /* Setup lport private data to point to fcoe softc */
672 port = lport_priv(lport);
674 ctlr = fcoe_to_ctlr(fcoe);
676 /* Figure out the VLAN ID, if any */
677 if (netdev->priv_flags & IFF_802_1Q_VLAN)
678 lport->vlan = vlan_dev_vlan_id(netdev);
683 * Determine max frame size based on underlying device and optional
684 * user-configured limit. If the MFS is too low, fcoe_link_ok()
685 * will return 0, so do this first.
688 if (netdev->features & NETIF_F_FCOE_MTU) {
690 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
692 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
693 if (fc_set_mfs(lport, mfs))
696 /* offload features support */
697 fcoe_netdev_features_change(lport, netdev);
699 skb_queue_head_init(&port->fcoe_pending_queue);
700 port->fcoe_pending_queue_active = 0;
701 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
703 fcoe_link_speed_update(lport);
706 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
707 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
708 fc_set_wwnn(lport, wwnn);
709 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
710 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
712 fc_set_wwpn(lport, wwpn);
719 * fcoe_shost_config() - Set up the SCSI host associated with a local port
720 * @lport: The local port
721 * @dev: The device associated with the SCSI host
723 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
725 * Returns: 0 for success
727 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
731 /* lport scsi host config */
732 lport->host->max_lun = FCOE_MAX_LUN;
733 lport->host->max_id = FCOE_MAX_FCP_TARGET;
734 lport->host->max_channel = 0;
735 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
738 lport->host->transportt = fcoe_vport_scsi_transport;
740 lport->host->transportt = fcoe_nport_scsi_transport;
742 /* add the new host to the SCSI-ml */
743 rc = scsi_add_host(lport->host, dev);
745 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
746 "error on scsi_add_host\n");
751 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
753 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
754 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
755 fcoe_netdev(lport)->name);
762 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
763 * @lport: The local port that is associated with the net device
764 * @netdev: The associated net device
766 * Must be called after fcoe_shost_config() as it will use local port mutex
769 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
771 struct fcoe_interface *fcoe;
772 struct fcoe_port *port;
773 struct net_device *realdev;
776 port = lport_priv(lport);
778 realdev = fcoe->realdev;
780 /* No FDMI state m/c for NPIV ports */
784 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
785 struct netdev_fcoe_hbainfo *fdmi;
786 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
790 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
793 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
794 "information from netdev.\n");
798 snprintf(fc_host_serial_number(lport->host),
799 FC_SERIAL_NUMBER_SIZE,
801 fdmi->serial_number);
802 snprintf(fc_host_manufacturer(lport->host),
803 FC_SERIAL_NUMBER_SIZE,
806 snprintf(fc_host_model(lport->host),
807 FC_SYMBOLIC_NAME_SIZE,
810 snprintf(fc_host_model_description(lport->host),
811 FC_SYMBOLIC_NAME_SIZE,
813 fdmi->model_description);
814 snprintf(fc_host_hardware_version(lport->host),
815 FC_VERSION_STRING_SIZE,
817 fdmi->hardware_version);
818 snprintf(fc_host_driver_version(lport->host),
819 FC_VERSION_STRING_SIZE,
821 fdmi->driver_version);
822 snprintf(fc_host_optionrom_version(lport->host),
823 FC_VERSION_STRING_SIZE,
825 fdmi->optionrom_version);
826 snprintf(fc_host_firmware_version(lport->host),
827 FC_VERSION_STRING_SIZE,
829 fdmi->firmware_version);
831 /* Enable FDMI lport states */
832 lport->fdmi_enabled = 1;
835 lport->fdmi_enabled = 0;
836 printk(KERN_INFO "fcoe: No FDMI support.\n");
841 * fcoe_oem_match() - The match routine for the offloaded exchange manager
844 * This routine will be associated with an exchange manager (EM). When
845 * the libfc exchange handling code is looking for an EM to use it will
846 * call this routine and pass it the frame that it wishes to send. This
847 * routine will return True if the associated EM is to be used and False
848 * if the echange code should continue looking for an EM.
850 * The offload EM that this routine is associated with will handle any
851 * packets that are for SCSI read requests.
853 * This has been enhanced to work when FCoE stack is operating in target
856 * Returns: True for read types I/O, otherwise returns false.
858 static bool fcoe_oem_match(struct fc_frame *fp)
860 struct fc_frame_header *fh = fc_frame_header_get(fp);
861 struct fcp_cmnd *fcp;
863 if (fc_fcp_is_read(fr_fsp(fp)) &&
864 (fr_fsp(fp)->data_len > fcoe_ddp_min))
866 else if ((fr_fsp(fp) == NULL) &&
867 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
868 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
869 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
870 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
871 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
878 * fcoe_em_config() - Allocate and configure an exchange manager
879 * @lport: The local port that the new EM will be associated with
881 * Returns: 0 on success
883 static inline int fcoe_em_config(struct fc_lport *lport)
885 struct fcoe_port *port = lport_priv(lport);
886 struct fcoe_interface *fcoe = port->priv;
887 struct fcoe_interface *oldfcoe = NULL;
888 struct net_device *old_real_dev, *cur_real_dev;
889 u16 min_xid = FCOE_MIN_XID;
890 u16 max_xid = FCOE_MAX_XID;
893 * Check if need to allocate an em instance for
894 * offload exchange ids to be shared across all VN_PORTs/lport.
896 if (!lport->lro_enabled || !lport->lro_xid ||
897 (lport->lro_xid >= max_xid)) {
903 * Reuse existing offload em instance in case
904 * it is already allocated on real eth device
906 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
907 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
909 cur_real_dev = fcoe->netdev;
911 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
912 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
913 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
915 old_real_dev = oldfcoe->netdev;
917 if (cur_real_dev == old_real_dev) {
918 fcoe->oem = oldfcoe->oem;
924 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
925 printk(KERN_ERR "fcoe_em_config: failed to add "
926 "offload em:%p on interface:%s\n",
927 fcoe->oem, fcoe->netdev->name);
931 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
932 FCOE_MIN_XID, lport->lro_xid,
935 printk(KERN_ERR "fcoe_em_config: failed to allocate "
936 "em for offload exches on interface:%s\n",
943 * Exclude offload EM xid range from next EM xid range.
945 min_xid += lport->lro_xid + 1;
948 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
949 printk(KERN_ERR "fcoe_em_config: failed to "
950 "allocate em on interface %s\n", fcoe->netdev->name);
958 * fcoe_if_destroy() - Tear down a SW FCoE instance
959 * @lport: The local port to be destroyed
962 static void fcoe_if_destroy(struct fc_lport *lport)
964 struct fcoe_port *port = lport_priv(lport);
965 struct fcoe_interface *fcoe = port->priv;
966 struct net_device *netdev = fcoe->netdev;
968 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
970 /* Logout of the fabric */
971 fc_fabric_logoff(lport);
973 /* Cleanup the fc_lport */
974 fc_lport_destroy(lport);
976 /* Stop the transmit retry timer */
977 del_timer_sync(&port->timer);
979 /* Free existing transmit skbs */
980 fcoe_clean_pending_queue(lport);
983 if (!is_zero_ether_addr(port->data_src_addr))
984 dev_uc_del(netdev, port->data_src_addr);
988 fcoe_interface_remove(fcoe);
991 /* Free queued packets for the per-CPU receive threads */
992 fcoe_percpu_clean(lport);
994 /* Detach from the scsi-ml */
995 fc_remove_host(lport->host);
996 scsi_remove_host(lport->host);
998 /* Destroy lport scsi_priv */
999 fc_fcp_destroy(lport);
1001 /* There are no more rports or I/O, free the EM */
1002 fc_exch_mgr_free(lport);
1004 /* Free memory used by statistical counters */
1005 fc_lport_free_stats(lport);
1008 * Release the Scsi_Host for vport but hold on to
1009 * master lport until it fcoe interface fully cleaned-up.
1012 scsi_host_put(lport->host);
1016 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1017 * @lport: The local port to setup DDP for
1018 * @xid: The exchange ID for this DDP transfer
1019 * @sgl: The scatterlist describing this transfer
1020 * @sgc: The number of sg items
1022 * Returns: 0 if the DDP context was not configured
1024 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1025 struct scatterlist *sgl, unsigned int sgc)
1027 struct net_device *netdev = fcoe_netdev(lport);
1029 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1030 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1038 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1039 * @lport: The local port to setup DDP for
1040 * @xid: The exchange ID for this DDP transfer
1041 * @sgl: The scatterlist describing this transfer
1042 * @sgc: The number of sg items
1044 * Returns: 0 if the DDP context was not configured
1046 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1047 struct scatterlist *sgl, unsigned int sgc)
1049 struct net_device *netdev = fcoe_netdev(lport);
1051 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1052 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1060 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1061 * @lport: The local port to complete DDP on
1062 * @xid: The exchange ID for this DDP transfer
1064 * Returns: the length of data that have been completed by DDP
1066 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1068 struct net_device *netdev = fcoe_netdev(lport);
1070 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1071 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1076 * fcoe_if_create() - Create a FCoE instance on an interface
1077 * @fcoe: The FCoE interface to create a local port on
1078 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1079 * @npiv: Indicates if the port is a vport or not
1081 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1083 * Returns: The allocated fc_lport or an error pointer
1085 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1086 struct device *parent, int npiv)
1088 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1089 struct net_device *netdev = fcoe->netdev;
1090 struct fc_lport *lport, *n_port;
1091 struct fcoe_port *port;
1092 struct Scsi_Host *shost;
1095 * parent is only a vport if npiv is 1,
1096 * but we'll only use vport in that case so go ahead and set it
1098 struct fc_vport *vport = dev_to_vport(parent);
1100 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1103 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1105 lport = libfc_vport_create(vport, sizeof(*port));
1108 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1112 port = lport_priv(lport);
1113 port->lport = lport;
1115 port->get_netdev = fcoe_netdev;
1116 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1117 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1118 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1121 * Need to add the lport to the hostlist
1122 * so we catch NETDEV_CHANGE events.
1124 fcoe_hostlist_add(lport);
1126 /* configure a fc_lport including the exchange manager */
1127 rc = fcoe_lport_config(lport);
1129 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1135 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1136 "%16.16llx %16.16llx\n",
1137 vport->node_name, vport->port_name);
1138 fc_set_wwnn(lport, vport->node_name);
1139 fc_set_wwpn(lport, vport->port_name);
1142 /* configure lport network properties */
1143 rc = fcoe_netdev_config(lport, netdev);
1145 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1147 goto out_lp_destroy;
1150 /* configure lport scsi host properties */
1151 rc = fcoe_shost_config(lport, parent);
1153 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1155 goto out_lp_destroy;
1158 /* Initialize the library */
1159 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
1161 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1163 goto out_lp_destroy;
1166 /* Initialized FDMI information */
1167 fcoe_fdmi_info(lport, netdev);
1170 * fcoe_em_alloc() and fcoe_hostlist_add() both
1171 * need to be atomic with respect to other changes to the
1172 * hostlist since fcoe_em_alloc() looks for an existing EM
1173 * instance on host list updated by fcoe_hostlist_add().
1175 * This is currently handled through the fcoe_config_mutex
1179 /* lport exch manager allocation */
1180 rc = fcoe_em_config(lport);
1182 shost = vport_to_shost(vport);
1183 n_port = shost_priv(shost);
1184 rc = fc_exch_mgr_list_clone(n_port, lport);
1188 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1189 goto out_lp_destroy;
1195 fc_exch_mgr_free(lport);
1197 fcoe_hostlist_del(lport);
1198 scsi_host_put(lport->host);
1204 * fcoe_if_init() - Initialization routine for fcoe.ko
1206 * Attaches the SW FCoE transport to the FC transport
1208 * Returns: 0 on success
1210 static int __init fcoe_if_init(void)
1212 /* attach to scsi transport */
1213 fcoe_nport_scsi_transport =
1214 fc_attach_transport(&fcoe_nport_fc_functions);
1215 fcoe_vport_scsi_transport =
1216 fc_attach_transport(&fcoe_vport_fc_functions);
1218 if (!fcoe_nport_scsi_transport) {
1219 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1227 * fcoe_if_exit() - Tear down fcoe.ko
1229 * Detaches the SW FCoE transport from the FC transport
1231 * Returns: 0 on success
1233 static int __exit fcoe_if_exit(void)
1235 fc_release_transport(fcoe_nport_scsi_transport);
1236 fc_release_transport(fcoe_vport_scsi_transport);
1237 fcoe_nport_scsi_transport = NULL;
1238 fcoe_vport_scsi_transport = NULL;
1242 static void fcoe_thread_cleanup_local(unsigned int cpu)
1244 struct page *crc_eof;
1245 struct fcoe_percpu_s *p;
1247 p = per_cpu_ptr(&fcoe_percpu, cpu);
1248 spin_lock_bh(&p->fcoe_rx_list.lock);
1249 crc_eof = p->crc_eof_page;
1250 p->crc_eof_page = NULL;
1251 p->crc_eof_offset = 0;
1252 spin_unlock_bh(&p->fcoe_rx_list.lock);
1256 flush_work(&p->work);
1260 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1263 * This routine selects next CPU based on cpumask to distribute
1264 * incoming requests in round robin.
1266 * Returns: int CPU number
1268 static inline unsigned int fcoe_select_cpu(void)
1270 static unsigned int selected_cpu;
1272 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1273 if (selected_cpu >= nr_cpu_ids)
1274 selected_cpu = cpumask_first(cpu_online_mask);
1276 return selected_cpu;
1280 * fcoe_rcv() - Receive packets from a net device
1281 * @skb: The received packet
1282 * @netdev: The net device that the packet was received on
1283 * @ptype: The packet type context
1284 * @olddev: The last device net device
1286 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1287 * FC frame and passes the frame to libfc.
1289 * Returns: 0 for success
1291 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1292 struct packet_type *ptype, struct net_device *olddev)
1294 struct fc_lport *lport;
1295 struct fcoe_rcv_info *fr;
1296 struct fcoe_ctlr *ctlr;
1297 struct fcoe_interface *fcoe;
1298 struct fc_frame_header *fh;
1299 struct fcoe_percpu_s *fps;
1303 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1304 ctlr = fcoe_to_ctlr(fcoe);
1306 if (unlikely(!lport)) {
1307 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
1310 if (!lport->link_up)
1313 FCOE_NETDEV_DBG(netdev,
1314 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1315 skb->len, skb->data_len, skb->head, skb->data,
1316 skb_tail_pointer(skb), skb_end_pointer(skb),
1317 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1320 skb = skb_share_check(skb, GFP_ATOMIC);
1327 if (is_fip_mode(ctlr) &&
1328 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
1329 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1335 * Check for minimum frame length, and make sure required FCoE
1336 * and FC headers are pulled into the linear data area.
1338 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1339 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1342 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1343 fh = (struct fc_frame_header *) skb_transport_header(skb);
1345 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1346 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1351 fr = fcoe_dev_from_skb(skb);
1355 * In case the incoming frame's exchange is originated from
1356 * the initiator, then received frame's exchange id is ANDed
1357 * with fc_cpu_mask bits to get the same cpu on which exchange
1358 * was originated, otherwise select cpu using rx exchange id
1359 * or fcoe_select_cpu().
1361 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1362 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1364 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1365 cpu = fcoe_select_cpu();
1367 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1370 if (cpu >= nr_cpu_ids)
1373 fps = &per_cpu(fcoe_percpu, cpu);
1374 spin_lock(&fps->fcoe_rx_list.lock);
1376 * We now have a valid CPU that we're targeting for
1377 * this skb. We also have this receive thread locked,
1378 * so we're free to queue skbs into it's queue.
1382 * Note: We used to have a set of conditions under which we would
1383 * call fcoe_recv_frame directly, rather than queuing to the rx list
1384 * as it could save a few cycles, but doing so is prohibited, as
1385 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1386 * in softirq context.
1388 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1389 schedule_work_on(cpu, &fps->work);
1390 spin_unlock(&fps->fcoe_rx_list.lock);
1392 return NET_RX_SUCCESS;
1394 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
1402 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1403 * @skb: The packet to be transmitted
1404 * @tlen: The total length of the trailer
1406 * Returns: 0 for success
1408 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1410 struct fcoe_percpu_s *fps;
1413 fps = &get_cpu_var(fcoe_percpu);
1414 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1415 put_cpu_var(fcoe_percpu);
1421 * fcoe_xmit() - Transmit a FCoE frame
1422 * @lport: The local port that the frame is to be transmitted for
1423 * @fp: The frame to be transmitted
1425 * Return: 0 for success
1427 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1432 struct fcoe_crc_eof *cp;
1433 struct sk_buff *skb;
1434 struct fc_stats *stats;
1435 struct fc_frame_header *fh;
1436 unsigned int hlen; /* header length implies the version */
1437 unsigned int tlen; /* trailer length */
1438 unsigned int elen; /* eth header, may include vlan */
1439 struct fcoe_port *port = lport_priv(lport);
1440 struct fcoe_interface *fcoe = port->priv;
1441 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1443 struct fcoe_hdr *hp;
1445 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1447 fh = fc_frame_header_get(fp);
1449 wlen = skb->len / FCOE_WORD_TO_BYTE;
1451 if (!lport->link_up) {
1456 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1457 fcoe_ctlr_els_send(ctlr, lport, skb))
1463 elen = sizeof(struct ethhdr);
1464 hlen = sizeof(struct fcoe_hdr);
1465 tlen = sizeof(struct fcoe_crc_eof);
1466 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1469 if (likely(lport->crc_offload)) {
1470 skb->ip_summed = CHECKSUM_PARTIAL;
1471 skb->csum_start = skb_headroom(skb);
1472 skb->csum_offset = skb->len;
1475 skb->ip_summed = CHECKSUM_NONE;
1476 crc = fcoe_fc_crc(fp);
1479 /* copy port crc and eof to the skb buff */
1480 if (skb_is_nonlinear(skb)) {
1482 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1486 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1487 cp = kmap_atomic(skb_frag_page(frag))
1488 + frag->page_offset;
1490 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1493 memset(cp, 0, sizeof(*cp));
1495 cp->fcoe_crc32 = cpu_to_le32(~crc);
1497 if (skb_is_nonlinear(skb)) {
1502 /* adjust skb network/transport offsets to match mac/fcoe/port */
1503 skb_push(skb, elen + hlen);
1504 skb_reset_mac_header(skb);
1505 skb_reset_network_header(skb);
1506 skb->mac_len = elen;
1507 skb->protocol = htons(ETH_P_FCOE);
1508 skb->priority = fcoe->priority;
1510 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
1511 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
1512 /* must set skb->dev before calling vlan_put_tag */
1513 skb->dev = fcoe->realdev;
1514 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1515 vlan_dev_vlan_id(fcoe->netdev));
1517 skb->dev = fcoe->netdev;
1519 /* fill up mac and fcoe headers */
1521 eh->h_proto = htons(ETH_P_FCOE);
1522 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1524 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1526 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1527 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
1529 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1531 hp = (struct fcoe_hdr *)(eh + 1);
1532 memset(hp, 0, sizeof(*hp));
1534 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1537 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1538 if (lport->seq_offload && fr_max_payload(fp)) {
1539 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1540 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1542 skb_shinfo(skb)->gso_type = 0;
1543 skb_shinfo(skb)->gso_size = 0;
1545 /* update tx stats: regardless if LLD fails */
1546 stats = per_cpu_ptr(lport->stats, get_cpu());
1548 stats->TxWords += wlen;
1551 /* send down to lld */
1553 fcoe_port_send(port, skb);
1558 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1559 * @lport: The local port the frame was received on
1560 * @fp: The received frame
1562 * Return: 0 on passing filtering checks
1564 static inline int fcoe_filter_frames(struct fc_lport *lport,
1565 struct fc_frame *fp)
1567 struct fcoe_ctlr *ctlr;
1568 struct fcoe_interface *fcoe;
1569 struct fc_frame_header *fh;
1570 struct sk_buff *skb = (struct sk_buff *)fp;
1571 struct fc_stats *stats;
1574 * We only check CRC if no offload is available and if it is
1575 * it's solicited data, in which case, the FCP layer would
1576 * check it during the copy.
1578 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1579 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1581 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1583 fh = (struct fc_frame_header *) skb_transport_header(skb);
1584 fh = fc_frame_header_get(fp);
1585 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1588 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1589 ctlr = fcoe_to_ctlr(fcoe);
1590 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1591 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1592 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1596 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1597 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1598 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1602 stats = per_cpu_ptr(lport->stats, get_cpu());
1603 stats->InvalidCRCCount++;
1604 if (stats->InvalidCRCCount < 5)
1605 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1611 * fcoe_recv_frame() - process a single received frame
1612 * @skb: frame to process
1614 static void fcoe_recv_frame(struct sk_buff *skb)
1617 struct fc_lport *lport;
1618 struct fcoe_rcv_info *fr;
1619 struct fc_stats *stats;
1620 struct fcoe_crc_eof crc_eof;
1621 struct fc_frame *fp;
1622 struct fcoe_port *port;
1623 struct fcoe_hdr *hp;
1625 fr = fcoe_dev_from_skb(skb);
1627 if (unlikely(!lport)) {
1628 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
1633 FCOE_NETDEV_DBG(skb->dev,
1634 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1635 skb->len, skb->data_len,
1636 skb->head, skb->data, skb_tail_pointer(skb),
1637 skb_end_pointer(skb), skb->csum,
1638 skb->dev ? skb->dev->name : "<NULL>");
1640 port = lport_priv(lport);
1641 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
1644 * Frame length checks and setting up the header pointers
1645 * was done in fcoe_rcv already.
1647 hp = (struct fcoe_hdr *) skb_network_header(skb);
1649 stats = per_cpu_ptr(lport->stats, get_cpu());
1650 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1651 if (stats->ErrorFrames < 5)
1652 printk(KERN_WARNING "fcoe: FCoE version "
1653 "mismatch: The frame has "
1654 "version %x, but the "
1655 "initiator supports version "
1656 "%x\n", FC_FCOE_DECAPS_VER(hp),
1661 skb_pull(skb, sizeof(struct fcoe_hdr));
1662 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1665 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1667 fp = (struct fc_frame *)skb;
1670 fr_sof(fp) = hp->fcoe_sof;
1672 /* Copy out the CRC and EOF trailer for access */
1673 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1675 fr_eof(fp) = crc_eof.fcoe_eof;
1676 fr_crc(fp) = crc_eof.fcoe_crc32;
1677 if (pskb_trim(skb, fr_len))
1680 if (!fcoe_filter_frames(lport, fp)) {
1682 fc_exch_recv(lport, fp);
1686 stats->ErrorFrames++;
1692 * fcoe_receive_work() - The per-CPU worker
1693 * @work: The work struct
1696 static void fcoe_receive_work(struct work_struct *work)
1698 struct fcoe_percpu_s *p;
1699 struct sk_buff *skb;
1700 struct sk_buff_head tmp;
1702 p = container_of(work, struct fcoe_percpu_s, work);
1703 skb_queue_head_init(&tmp);
1705 spin_lock_bh(&p->fcoe_rx_list.lock);
1706 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1707 spin_unlock_bh(&p->fcoe_rx_list.lock);
1709 if (!skb_queue_len(&tmp))
1712 while ((skb = __skb_dequeue(&tmp)))
1713 fcoe_recv_frame(skb);
1717 * fcoe_dev_setup() - Setup the link change notification interface
1719 static void fcoe_dev_setup(void)
1721 register_dcbevent_notifier(&dcb_notifier);
1722 register_netdevice_notifier(&fcoe_notifier);
1726 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1728 static void fcoe_dev_cleanup(void)
1730 unregister_dcbevent_notifier(&dcb_notifier);
1731 unregister_netdevice_notifier(&fcoe_notifier);
1734 static struct fcoe_interface *
1735 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1737 struct fcoe_interface *fcoe;
1738 struct net_device *real_dev;
1740 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1741 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1742 real_dev = vlan_dev_real_dev(fcoe->netdev);
1744 real_dev = fcoe->netdev;
1746 if (netdev == real_dev)
1752 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1753 ulong event, void *ptr)
1755 struct dcb_app_type *entry = ptr;
1756 struct fcoe_ctlr *ctlr;
1757 struct fcoe_interface *fcoe;
1758 struct net_device *netdev;
1761 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1764 netdev = dev_get_by_index(&init_net, entry->ifindex);
1768 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1773 ctlr = fcoe_to_ctlr(fcoe);
1775 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1776 prio = ffs(entry->app.priority) - 1;
1778 prio = entry->app.priority;
1783 if (entry->app.protocol == ETH_P_FIP ||
1784 entry->app.protocol == ETH_P_FCOE)
1785 ctlr->priority = prio;
1787 if (entry->app.protocol == ETH_P_FCOE)
1788 fcoe->priority = prio;
1794 * fcoe_device_notification() - Handler for net device events
1795 * @notifier: The context of the notification
1796 * @event: The type of event
1797 * @ptr: The net device that the event was on
1799 * This function is called by the Ethernet driver in case of link change event.
1801 * Returns: 0 for success
1803 static int fcoe_device_notification(struct notifier_block *notifier,
1804 ulong event, void *ptr)
1806 struct fcoe_ctlr_device *cdev;
1807 struct fc_lport *lport = NULL;
1808 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1809 struct fcoe_ctlr *ctlr;
1810 struct fcoe_interface *fcoe;
1811 struct fcoe_port *port;
1812 struct fc_stats *stats;
1813 u32 link_possible = 1;
1817 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1818 if (fcoe->netdev == netdev) {
1819 ctlr = fcoe_to_ctlr(fcoe);
1831 case NETDEV_GOING_DOWN:
1837 case NETDEV_CHANGEMTU:
1838 if (netdev->features & NETIF_F_FCOE_MTU)
1840 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1841 sizeof(struct fcoe_crc_eof));
1842 if (mfs >= FC_MIN_MAX_FRAME)
1843 fc_set_mfs(lport, mfs);
1845 case NETDEV_REGISTER:
1847 case NETDEV_UNREGISTER:
1848 list_del(&fcoe->list);
1849 port = lport_priv(ctlr->lp);
1850 queue_work(fcoe_wq, &port->destroy_work);
1853 case NETDEV_FEAT_CHANGE:
1854 fcoe_netdev_features_change(lport, netdev);
1857 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1858 "from netdev netlink\n", event);
1861 fcoe_link_speed_update(lport);
1863 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
1865 if (link_possible && !fcoe_link_ok(lport)) {
1866 switch (cdev->enabled) {
1867 case FCOE_CTLR_DISABLED:
1868 pr_info("Link up while interface is disabled.\n");
1870 case FCOE_CTLR_ENABLED:
1871 case FCOE_CTLR_UNUSED:
1872 fcoe_ctlr_link_up(ctlr);
1874 } else if (fcoe_ctlr_link_down(ctlr)) {
1875 switch (cdev->enabled) {
1876 case FCOE_CTLR_DISABLED:
1877 pr_info("Link down while interface is disabled.\n");
1879 case FCOE_CTLR_ENABLED:
1880 case FCOE_CTLR_UNUSED:
1881 stats = per_cpu_ptr(lport->stats, get_cpu());
1882 stats->LinkFailureCount++;
1884 fcoe_clean_pending_queue(lport);
1892 * fcoe_disable() - Disables a FCoE interface
1893 * @netdev : The net_device object the Ethernet interface to create on
1895 * Called from fcoe transport.
1897 * Returns: 0 for success
1899 * Deprecated: use fcoe_ctlr_enabled()
1901 static int fcoe_disable(struct net_device *netdev)
1903 struct fcoe_ctlr *ctlr;
1904 struct fcoe_interface *fcoe;
1907 mutex_lock(&fcoe_config_mutex);
1910 fcoe = fcoe_hostlist_lookup_port(netdev);
1914 ctlr = fcoe_to_ctlr(fcoe);
1915 fcoe_ctlr_link_down(ctlr);
1916 fcoe_clean_pending_queue(ctlr->lp);
1920 mutex_unlock(&fcoe_config_mutex);
1925 * fcoe_enable() - Enables a FCoE interface
1926 * @netdev : The net_device object the Ethernet interface to create on
1928 * Called from fcoe transport.
1930 * Returns: 0 for success
1932 static int fcoe_enable(struct net_device *netdev)
1934 struct fcoe_ctlr *ctlr;
1935 struct fcoe_interface *fcoe;
1938 mutex_lock(&fcoe_config_mutex);
1940 fcoe = fcoe_hostlist_lookup_port(netdev);
1948 ctlr = fcoe_to_ctlr(fcoe);
1950 if (!fcoe_link_ok(ctlr->lp))
1951 fcoe_ctlr_link_up(ctlr);
1954 mutex_unlock(&fcoe_config_mutex);
1959 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
1960 * @cdev: The FCoE Controller that is being enabled or disabled
1962 * fcoe_sysfs will ensure that the state of 'enabled' has
1963 * changed, so no checking is necessary here. This routine simply
1964 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
1965 * When those routines are removed the functionality can be merged
1968 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
1970 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
1971 struct fc_lport *lport = ctlr->lp;
1972 struct net_device *netdev = fcoe_netdev(lport);
1974 switch (cdev->enabled) {
1975 case FCOE_CTLR_ENABLED:
1976 return fcoe_enable(netdev);
1977 case FCOE_CTLR_DISABLED:
1978 return fcoe_disable(netdev);
1979 case FCOE_CTLR_UNUSED:
1986 * fcoe_ctlr_mode() - Switch FIP mode
1987 * @cdev: The FCoE Controller that is being modified
1989 * When the FIP mode has been changed we need to update
1990 * the multicast addresses to ensure we get the correct
1993 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev)
1995 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
1996 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
1998 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN &&
1999 ctlr->mode != FIP_MODE_VN2VN) {
2000 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS);
2001 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2002 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS);
2003 } else if (ctlr->mode != FIP_MODE_FABRIC) {
2004 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2005 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS);
2006 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS);
2008 fcoe_ctlr_set_fip_mode(ctlr_dev);
2012 * fcoe_destroy() - Destroy a FCoE interface
2013 * @netdev : The net_device object the Ethernet interface to create on
2015 * Called from fcoe transport
2017 * Returns: 0 for success
2019 static int fcoe_destroy(struct net_device *netdev)
2021 struct fcoe_ctlr *ctlr;
2022 struct fcoe_interface *fcoe;
2023 struct fc_lport *lport;
2024 struct fcoe_port *port;
2027 mutex_lock(&fcoe_config_mutex);
2029 fcoe = fcoe_hostlist_lookup_port(netdev);
2034 ctlr = fcoe_to_ctlr(fcoe);
2036 port = lport_priv(lport);
2037 list_del(&fcoe->list);
2038 queue_work(fcoe_wq, &port->destroy_work);
2041 mutex_unlock(&fcoe_config_mutex);
2046 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2047 * @work: Handle to the FCoE port to be destroyed
2049 static void fcoe_destroy_work(struct work_struct *work)
2051 struct fcoe_ctlr_device *cdev;
2052 struct fcoe_ctlr *ctlr;
2053 struct fcoe_port *port;
2054 struct fcoe_interface *fcoe;
2055 struct Scsi_Host *shost;
2056 struct fc_host_attrs *fc_host;
2057 unsigned long flags;
2058 struct fc_vport *vport;
2059 struct fc_vport *next_vport;
2061 port = container_of(work, struct fcoe_port, destroy_work);
2062 shost = port->lport->host;
2063 fc_host = shost_to_fc_host(shost);
2065 /* Loop through all the vports and mark them for deletion */
2066 spin_lock_irqsave(shost->host_lock, flags);
2067 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2068 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2071 vport->flags |= FC_VPORT_DELETING;
2072 queue_work(fc_host_work_q(shost),
2073 &vport->vport_delete_work);
2076 spin_unlock_irqrestore(shost->host_lock, flags);
2078 flush_workqueue(fc_host_work_q(shost));
2080 mutex_lock(&fcoe_config_mutex);
2083 ctlr = fcoe_to_ctlr(fcoe);
2084 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2086 fcoe_if_destroy(port->lport);
2087 fcoe_interface_cleanup(fcoe);
2089 mutex_unlock(&fcoe_config_mutex);
2091 fcoe_ctlr_device_delete(cdev);
2095 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2096 * @netdev : The net_device object the Ethernet interface to create on
2098 * Called from fcoe transport.
2100 * Returns: always returns true as this is the default FCoE transport,
2101 * i.e., support all netdevs.
2103 static bool fcoe_match(struct net_device *netdev)
2109 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2110 * @netdev: The net_device object of the L2 link that should be queried
2111 * @port: The fcoe_port to bind FCoE APP priority with
2114 static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2119 struct net_device *netdev = fcoe->realdev;
2120 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2121 struct dcb_app app = {
2123 .protocol = ETH_P_FCOE
2126 /* setup DCB priority attributes. */
2127 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2128 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2130 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2131 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2132 up = dcb_ieee_getapp_mask(netdev, &app);
2133 app.protocol = ETH_P_FIP;
2134 fup = dcb_ieee_getapp_mask(netdev, &app);
2136 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2137 up = dcb_getapp(netdev, &app);
2138 app.protocol = ETH_P_FIP;
2139 fup = dcb_getapp(netdev, &app);
2142 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0;
2143 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority;
2148 enum fcoe_create_link_state {
2149 FCOE_CREATE_LINK_DOWN,
2150 FCOE_CREATE_LINK_UP,
2154 * _fcoe_create() - (internal) Create a fcoe interface
2155 * @netdev : The net_device object the Ethernet interface to create on
2156 * @fip_mode: The FIP mode for this creation
2157 * @link_state: The ctlr link state on creation
2159 * Called from either the libfcoe 'create' module parameter
2160 * via fcoe_create or from fcoe_syfs's ctlr_create file.
2162 * libfcoe's 'create' module parameter is deprecated so some
2163 * consolidation of code can be done when that interface is
2166 static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode,
2167 enum fcoe_create_link_state link_state)
2170 struct fcoe_ctlr_device *ctlr_dev;
2171 struct fcoe_ctlr *ctlr;
2172 struct fcoe_interface *fcoe;
2173 struct fc_lport *lport;
2175 mutex_lock(&fcoe_config_mutex);
2178 /* look for existing lport */
2179 if (fcoe_hostlist_lookup(netdev)) {
2184 fcoe = fcoe_interface_create(netdev, fip_mode);
2190 ctlr = fcoe_to_ctlr(fcoe);
2191 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2192 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
2193 if (IS_ERR(lport)) {
2194 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2198 fcoe_interface_cleanup(fcoe);
2199 mutex_unlock(&fcoe_config_mutex);
2200 fcoe_ctlr_device_delete(ctlr_dev);
2204 /* Make this the "master" N_Port */
2207 /* setup DCB priority attributes. */
2208 fcoe_dcb_create(fcoe);
2210 /* start FIP Discovery and FLOGI */
2211 lport->boot_time = jiffies;
2212 fc_fabric_login(lport);
2215 * If the fcoe_ctlr_device is to be set to DISABLED
2216 * it must be done after the lport is added to the
2217 * hostlist, but before the rtnl_lock is released.
2218 * This is because the rtnl_lock protects the
2219 * hostlist that fcoe_device_notification uses. If
2220 * the FCoE Controller is intended to be created
2221 * DISABLED then 'enabled' needs to be considered
2222 * handling link events. 'enabled' must be set
2223 * before the lport can be found in the hostlist
2224 * when a link up event is received.
2226 if (link_state == FCOE_CREATE_LINK_UP)
2227 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2229 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2231 if (link_state == FCOE_CREATE_LINK_UP &&
2232 !fcoe_link_ok(lport)) {
2234 fcoe_ctlr_link_up(ctlr);
2235 mutex_unlock(&fcoe_config_mutex);
2241 mutex_unlock(&fcoe_config_mutex);
2247 * fcoe_create() - Create a fcoe interface
2248 * @netdev : The net_device object the Ethernet interface to create on
2249 * @fip_mode: The FIP mode for this creation
2251 * Called from fcoe transport
2253 * Returns: 0 for success
2255 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode)
2257 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2261 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2262 * @netdev: The net_device to be used by the allocated FCoE Controller
2264 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2265 * in a link_down state. The allows the user an opportunity to configure
2266 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2268 * Creating in with this routine starts the FCoE Controller in Fabric
2269 * mode. The user can change to VN2VN or another mode before enabling.
2271 static int fcoe_ctlr_alloc(struct net_device *netdev)
2273 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2274 FCOE_CREATE_LINK_DOWN);
2278 * fcoe_link_ok() - Check if the link is OK for a local port
2279 * @lport: The local port to check link on
2281 * Returns: 0 if link is UP and OK, -1 if not
2284 static int fcoe_link_ok(struct fc_lport *lport)
2286 struct net_device *netdev = fcoe_netdev(lport);
2288 if (netif_oper_up(netdev))
2294 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2295 * @lport: The local port whose skbs are to be cleared
2297 * Must be called with fcoe_create_mutex held to single-thread completion.
2299 * This flushes the pending skbs by flush the work item for each CPU. The work
2300 * item on each possible CPU is flushed because we may have used the per-CPU
2301 * struct of an offline CPU.
2303 static void fcoe_percpu_clean(struct fc_lport *lport)
2305 struct fcoe_percpu_s *pp;
2308 for_each_possible_cpu(cpu) {
2309 pp = &per_cpu(fcoe_percpu, cpu);
2311 flush_work(&pp->work);
2316 * fcoe_reset() - Reset a local port
2317 * @shost: The SCSI host associated with the local port to be reset
2319 * Returns: Always 0 (return value required by FC transport template)
2321 static int fcoe_reset(struct Scsi_Host *shost)
2323 struct fc_lport *lport = shost_priv(shost);
2324 struct fcoe_port *port = lport_priv(lport);
2325 struct fcoe_interface *fcoe = port->priv;
2326 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2327 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2329 fcoe_ctlr_link_down(ctlr);
2330 fcoe_clean_pending_queue(ctlr->lp);
2332 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2333 !fcoe_link_ok(ctlr->lp))
2334 fcoe_ctlr_link_up(ctlr);
2339 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2340 * @netdev: The net device used as a key
2342 * Locking: Must be called with the RNL mutex held.
2344 * Returns: NULL or the FCoE interface
2346 static struct fcoe_interface *
2347 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2349 struct fcoe_interface *fcoe;
2351 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2352 if (fcoe->netdev == netdev)
2359 * fcoe_hostlist_lookup() - Find the local port associated with a
2361 * @netdev: The netdevice used as a key
2363 * Locking: Must be called with the RTNL mutex held
2365 * Returns: NULL or the local port
2367 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2369 struct fcoe_ctlr *ctlr;
2370 struct fcoe_interface *fcoe;
2372 fcoe = fcoe_hostlist_lookup_port(netdev);
2373 ctlr = fcoe_to_ctlr(fcoe);
2374 return (fcoe) ? ctlr->lp : NULL;
2378 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2379 * port to the hostlist
2380 * @lport: The local port that identifies the FCoE interface to be added
2382 * Locking: must be called with the RTNL mutex held
2384 * Returns: 0 for success
2386 static int fcoe_hostlist_add(const struct fc_lport *lport)
2388 struct fcoe_interface *fcoe;
2389 struct fcoe_port *port;
2391 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2393 port = lport_priv(lport);
2395 list_add_tail(&fcoe->list, &fcoe_hostlist);
2401 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2402 * port to the hostlist
2403 * @lport: The local port that identifies the FCoE interface to be added
2405 * Locking: must be called with the RTNL mutex held
2408 static void fcoe_hostlist_del(const struct fc_lport *lport)
2410 struct fcoe_interface *fcoe;
2411 struct fcoe_port *port;
2413 port = lport_priv(lport);
2415 list_del(&fcoe->list);
2419 static struct fcoe_transport fcoe_sw_transport = {
2420 .name = {FCOE_TRANSPORT_DEFAULT},
2422 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2423 .match = fcoe_match,
2424 .alloc = fcoe_ctlr_alloc,
2425 .create = fcoe_create,
2426 .destroy = fcoe_destroy,
2427 .enable = fcoe_enable,
2428 .disable = fcoe_disable,
2432 * fcoe_init() - Initialize fcoe.ko
2434 * Returns: 0 on success, or a negative value on failure
2436 static int __init fcoe_init(void)
2438 struct fcoe_percpu_s *p;
2442 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2446 /* register as a fcoe transport */
2447 rc = fcoe_transport_attach(&fcoe_sw_transport);
2449 printk(KERN_ERR "failed to register an fcoe transport, check "
2450 "if libfcoe is loaded\n");
2454 mutex_lock(&fcoe_config_mutex);
2456 for_each_possible_cpu(cpu) {
2457 p = per_cpu_ptr(&fcoe_percpu, cpu);
2458 INIT_WORK(&p->work, fcoe_receive_work);
2459 skb_queue_head_init(&p->fcoe_rx_list);
2462 /* Setup link change notification */
2465 rc = fcoe_if_init();
2469 mutex_unlock(&fcoe_config_mutex);
2473 mutex_unlock(&fcoe_config_mutex);
2474 destroy_workqueue(fcoe_wq);
2477 module_init(fcoe_init);
2480 * fcoe_exit() - Clean up fcoe.ko
2482 * Returns: 0 on success or a negative value on failure
2484 static void __exit fcoe_exit(void)
2486 struct fcoe_interface *fcoe, *tmp;
2487 struct fcoe_ctlr *ctlr;
2488 struct fcoe_port *port;
2491 mutex_lock(&fcoe_config_mutex);
2495 /* releases the associated fcoe hosts */
2497 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2498 ctlr = fcoe_to_ctlr(fcoe);
2499 port = lport_priv(ctlr->lp);
2500 fcoe_hostlist_del(port->lport);
2501 queue_work(fcoe_wq, &port->destroy_work);
2505 for_each_possible_cpu(cpu)
2506 fcoe_thread_cleanup_local(cpu);
2508 mutex_unlock(&fcoe_config_mutex);
2511 * destroy_work's may be chained but destroy_workqueue()
2512 * can take care of them. Just kill the fcoe_wq.
2514 destroy_workqueue(fcoe_wq);
2517 * Detaching from the scsi transport must happen after all
2518 * destroys are done on the fcoe_wq. destroy_workqueue will
2519 * enusre the fcoe_wq is flushed.
2523 /* detach from fcoe transport */
2524 fcoe_transport_detach(&fcoe_sw_transport);
2526 module_exit(fcoe_exit);
2529 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2530 * @seq: active sequence in the FLOGI or FDISC exchange
2531 * @fp: response frame, or error encoded in a pointer (timeout)
2532 * @arg: pointer the the fcoe_ctlr structure
2534 * This handles MAC address management for FCoE, then passes control on to
2535 * the libfc FLOGI response handler.
2537 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2539 struct fcoe_ctlr *fip = arg;
2540 struct fc_exch *exch = fc_seq_exch(seq);
2541 struct fc_lport *lport = exch->lp;
2547 mac = fr_cb(fp)->granted_mac;
2549 if (is_zero_ether_addr(mac))
2550 fcoe_ctlr_recv_flogi(fip, lport, fp);
2551 if (!is_zero_ether_addr(mac))
2552 fcoe_update_src_mac(lport, mac);
2554 fc_lport_flogi_resp(seq, fp, lport);
2558 * fcoe_logo_resp() - FCoE specific LOGO response handler
2559 * @seq: active sequence in the LOGO exchange
2560 * @fp: response frame, or error encoded in a pointer (timeout)
2561 * @arg: pointer the the fcoe_ctlr structure
2563 * This handles MAC address management for FCoE, then passes control on to
2564 * the libfc LOGO response handler.
2566 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2568 struct fc_lport *lport = arg;
2569 static u8 zero_mac[ETH_ALEN] = { 0 };
2572 fcoe_update_src_mac(lport, zero_mac);
2573 fc_lport_logo_resp(seq, fp, lport);
2577 * fcoe_elsct_send - FCoE specific ELS handler
2579 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2580 * using FCoE specific response handlers and passing the FIP controller as
2581 * the argument (the lport is still available from the exchange).
2583 * Most of the work here is just handed off to the libfc routine.
2585 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2586 struct fc_frame *fp, unsigned int op,
2587 void (*resp)(struct fc_seq *,
2590 void *arg, u32 timeout)
2592 struct fcoe_port *port = lport_priv(lport);
2593 struct fcoe_interface *fcoe = port->priv;
2594 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
2595 struct fc_frame_header *fh = fc_frame_header_get(fp);
2600 if (lport->point_to_multipoint)
2602 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2605 /* only hook onto fabric logouts, not port logouts */
2606 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2608 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2611 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2615 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2616 * @vport: fc_vport object to create a new fc_host for
2617 * @disabled: start the new fc_host in a disabled state by default?
2619 * Returns: 0 for success
2621 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2623 struct Scsi_Host *shost = vport_to_shost(vport);
2624 struct fc_lport *n_port = shost_priv(shost);
2625 struct fcoe_port *port = lport_priv(n_port);
2626 struct fcoe_interface *fcoe = port->priv;
2627 struct net_device *netdev = fcoe->netdev;
2628 struct fc_lport *vn_port;
2632 rc = fcoe_validate_vport_create(vport);
2634 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2635 printk(KERN_ERR "fcoe: Failed to create vport, "
2636 "WWPN (0x%s) already exists\n",
2641 mutex_lock(&fcoe_config_mutex);
2643 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2645 mutex_unlock(&fcoe_config_mutex);
2647 if (IS_ERR(vn_port)) {
2648 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2654 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2656 vn_port->boot_time = jiffies;
2657 fc_fabric_login(vn_port);
2658 fc_vport_setlink(vn_port);
2664 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2665 * @vport: fc_vport object that is being destroyed
2667 * Returns: 0 for success
2669 static int fcoe_vport_destroy(struct fc_vport *vport)
2671 struct Scsi_Host *shost = vport_to_shost(vport);
2672 struct fc_lport *n_port = shost_priv(shost);
2673 struct fc_lport *vn_port = vport->dd_data;
2675 mutex_lock(&n_port->lp_mutex);
2676 list_del(&vn_port->list);
2677 mutex_unlock(&n_port->lp_mutex);
2679 mutex_lock(&fcoe_config_mutex);
2680 fcoe_if_destroy(vn_port);
2681 mutex_unlock(&fcoe_config_mutex);
2687 * fcoe_vport_disable() - change vport state
2688 * @vport: vport to bring online/offline
2689 * @disable: should the vport be disabled?
2691 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2693 struct fc_lport *lport = vport->dd_data;
2696 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2697 fc_fabric_logoff(lport);
2699 lport->boot_time = jiffies;
2700 fc_fabric_login(lport);
2701 fc_vport_setlink(lport);
2708 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2709 * @vport: fc_vport with a new symbolic name string
2711 * After generating a new symbolic name string, a new RSPN_ID request is
2712 * sent to the name server. There is no response handler, so if it fails
2713 * for some reason it will not be retried.
2715 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2717 struct fc_lport *lport = vport->dd_data;
2718 struct fc_frame *fp;
2721 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2722 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2723 fcoe_netdev(lport)->name, vport->symbolic_name);
2725 if (lport->state != LPORT_ST_READY)
2728 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2729 fp = fc_frame_alloc(lport,
2730 sizeof(struct fc_ct_hdr) +
2731 sizeof(struct fc_ns_rspn) + len);
2734 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2735 NULL, NULL, 3 * lport->r_a_tov);
2738 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2740 struct fcoe_ctlr_device *ctlr_dev =
2741 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2742 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2743 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2745 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2749 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2750 * @lport: the local port
2751 * @port_id: the port ID
2752 * @fp: the received frame, if any, that caused the port_id to be set.
2754 * This routine handles the case where we received a FLOGI and are
2755 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2756 * so it can set the non-mapped mode and gateway address.
2758 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2760 static void fcoe_set_port_id(struct fc_lport *lport,
2761 u32 port_id, struct fc_frame *fp)
2763 struct fcoe_port *port = lport_priv(lport);
2764 struct fcoe_interface *fcoe = port->priv;
2765 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2767 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2768 fcoe_ctlr_recv_flogi(ctlr, lport, fp);