2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
20 #include <linux/module.h>
21 #include <linux/spinlock.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/if_ether.h>
26 #include <linux/if_vlan.h>
27 #include <linux/crc32.h>
28 #include <linux/slab.h>
29 #include <linux/cpu.h>
31 #include <linux/sysfs.h>
32 #include <linux/ctype.h>
33 #include <linux/workqueue.h>
34 #include <net/dcbnl.h>
35 #include <net/dcbevent.h>
36 #include <scsi/scsi_tcq.h>
37 #include <scsi/scsicam.h>
38 #include <scsi/scsi_transport.h>
39 #include <scsi/scsi_transport_fc.h>
40 #include <net/rtnetlink.h>
42 #include <scsi/fc/fc_encaps.h>
43 #include <scsi/fc/fc_fip.h>
45 #include <scsi/libfc.h>
46 #include <scsi/fc_frame.h>
47 #include <scsi/libfcoe.h>
51 MODULE_AUTHOR("Open-FCoE.org");
52 MODULE_DESCRIPTION("FCoE");
53 MODULE_LICENSE("GPL v2");
55 /* Performance tuning parameters for fcoe */
56 static unsigned int fcoe_ddp_min = 4096;
57 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
58 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
59 "Direct Data Placement (DDP).");
61 unsigned int fcoe_debug_logging;
62 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
63 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
65 static DEFINE_MUTEX(fcoe_config_mutex);
67 static struct workqueue_struct *fcoe_wq;
69 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
70 static DECLARE_COMPLETION(fcoe_flush_completion);
73 /* must only by accessed under the RTNL mutex */
74 static LIST_HEAD(fcoe_hostlist);
75 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
77 /* Function Prototypes */
78 static int fcoe_reset(struct Scsi_Host *);
79 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
80 static int fcoe_rcv(struct sk_buff *, struct net_device *,
81 struct packet_type *, struct net_device *);
82 static int fcoe_percpu_receive_thread(void *);
83 static void fcoe_percpu_clean(struct fc_lport *);
84 static int fcoe_link_speed_update(struct fc_lport *);
85 static int fcoe_link_ok(struct fc_lport *);
87 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
88 static int fcoe_hostlist_add(const struct fc_lport *);
90 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
91 static void fcoe_dev_setup(void);
92 static void fcoe_dev_cleanup(void);
93 static struct fcoe_interface
94 *fcoe_hostlist_lookup_port(const struct net_device *);
96 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
97 struct packet_type *, struct net_device *);
99 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
100 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
101 static u8 *fcoe_get_src_mac(struct fc_lport *);
102 static void fcoe_destroy_work(struct work_struct *);
104 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
106 static int fcoe_ddp_done(struct fc_lport *, u16);
107 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
109 static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
110 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
111 ulong event, void *ptr);
113 static bool fcoe_match(struct net_device *netdev);
114 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode);
115 static int fcoe_destroy(struct net_device *netdev);
116 static int fcoe_enable(struct net_device *netdev);
117 static int fcoe_disable(struct net_device *netdev);
119 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
120 u32 did, struct fc_frame *,
122 void (*resp)(struct fc_seq *,
125 void *, u32 timeout);
126 static void fcoe_recv_frame(struct sk_buff *skb);
128 static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
130 /* notification function for packets from net device */
131 static struct notifier_block fcoe_notifier = {
132 .notifier_call = fcoe_device_notification,
135 /* notification function for CPU hotplug events */
136 static struct notifier_block fcoe_cpu_notifier = {
137 .notifier_call = fcoe_cpu_callback,
140 /* notification function for DCB events */
141 static struct notifier_block dcb_notifier = {
142 .notifier_call = fcoe_dcb_app_notification,
145 static struct scsi_transport_template *fcoe_nport_scsi_transport;
146 static struct scsi_transport_template *fcoe_vport_scsi_transport;
148 static int fcoe_vport_destroy(struct fc_vport *);
149 static int fcoe_vport_create(struct fc_vport *, bool disabled);
150 static int fcoe_vport_disable(struct fc_vport *, bool disable);
151 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
152 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
154 static struct libfc_function_template fcoe_libfc_fcn_templ = {
155 .frame_send = fcoe_xmit,
156 .ddp_setup = fcoe_ddp_setup,
157 .ddp_done = fcoe_ddp_done,
158 .ddp_target = fcoe_ddp_target,
159 .elsct_send = fcoe_elsct_send,
160 .get_lesb = fcoe_get_lesb,
161 .lport_set_port_id = fcoe_set_port_id,
164 static struct fc_function_template fcoe_nport_fc_functions = {
165 .show_host_node_name = 1,
166 .show_host_port_name = 1,
167 .show_host_supported_classes = 1,
168 .show_host_supported_fc4s = 1,
169 .show_host_active_fc4s = 1,
170 .show_host_maxframe_size = 1,
171 .show_host_serial_number = 1,
172 .show_host_manufacturer = 1,
173 .show_host_model = 1,
174 .show_host_model_description = 1,
175 .show_host_hardware_version = 1,
176 .show_host_driver_version = 1,
177 .show_host_firmware_version = 1,
178 .show_host_optionrom_version = 1,
180 .show_host_port_id = 1,
181 .show_host_supported_speeds = 1,
182 .get_host_speed = fc_get_host_speed,
183 .show_host_speed = 1,
184 .show_host_port_type = 1,
185 .get_host_port_state = fc_get_host_port_state,
186 .show_host_port_state = 1,
187 .show_host_symbolic_name = 1,
189 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
190 .show_rport_maxframe_size = 1,
191 .show_rport_supported_classes = 1,
193 .show_host_fabric_name = 1,
194 .show_starget_node_name = 1,
195 .show_starget_port_name = 1,
196 .show_starget_port_id = 1,
197 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
198 .show_rport_dev_loss_tmo = 1,
199 .get_fc_host_stats = fc_get_host_stats,
200 .issue_fc_host_lip = fcoe_reset,
202 .terminate_rport_io = fc_rport_terminate_io,
204 .vport_create = fcoe_vport_create,
205 .vport_delete = fcoe_vport_destroy,
206 .vport_disable = fcoe_vport_disable,
207 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
209 .bsg_request = fc_lport_bsg_request,
212 static struct fc_function_template fcoe_vport_fc_functions = {
213 .show_host_node_name = 1,
214 .show_host_port_name = 1,
215 .show_host_supported_classes = 1,
216 .show_host_supported_fc4s = 1,
217 .show_host_active_fc4s = 1,
218 .show_host_maxframe_size = 1,
219 .show_host_serial_number = 1,
220 .show_host_manufacturer = 1,
221 .show_host_model = 1,
222 .show_host_model_description = 1,
223 .show_host_hardware_version = 1,
224 .show_host_driver_version = 1,
225 .show_host_firmware_version = 1,
226 .show_host_optionrom_version = 1,
228 .show_host_port_id = 1,
229 .show_host_supported_speeds = 1,
230 .get_host_speed = fc_get_host_speed,
231 .show_host_speed = 1,
232 .show_host_port_type = 1,
233 .get_host_port_state = fc_get_host_port_state,
234 .show_host_port_state = 1,
235 .show_host_symbolic_name = 1,
237 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
238 .show_rport_maxframe_size = 1,
239 .show_rport_supported_classes = 1,
241 .show_host_fabric_name = 1,
242 .show_starget_node_name = 1,
243 .show_starget_port_name = 1,
244 .show_starget_port_id = 1,
245 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
246 .show_rport_dev_loss_tmo = 1,
247 .get_fc_host_stats = fc_get_host_stats,
248 .issue_fc_host_lip = fcoe_reset,
250 .terminate_rport_io = fc_rport_terminate_io,
252 .bsg_request = fc_lport_bsg_request,
255 static struct scsi_host_template fcoe_shost_template = {
256 .module = THIS_MODULE,
257 .name = "FCoE Driver",
258 .proc_name = FCOE_NAME,
259 .queuecommand = fc_queuecommand,
260 .eh_abort_handler = fc_eh_abort,
261 .eh_device_reset_handler = fc_eh_device_reset,
262 .eh_host_reset_handler = fc_eh_host_reset,
263 .slave_alloc = fc_slave_alloc,
264 .change_queue_depth = fc_change_queue_depth,
265 .change_queue_type = fc_change_queue_type,
268 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
269 .use_clustering = ENABLE_CLUSTERING,
270 .sg_tablesize = SG_ALL,
271 .max_sectors = 0xffff,
275 * fcoe_interface_setup() - Setup a FCoE interface
276 * @fcoe: The new FCoE interface
277 * @netdev: The net device that the fcoe interface is on
279 * Returns : 0 for success
280 * Locking: must be called with the RTNL mutex held
282 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
283 struct net_device *netdev)
285 struct fcoe_ctlr *fip = &fcoe->ctlr;
286 struct netdev_hw_addr *ha;
287 struct net_device *real_dev;
288 u8 flogi_maddr[ETH_ALEN];
289 const struct net_device_ops *ops;
291 fcoe->netdev = netdev;
293 /* Let LLD initialize for FCoE */
294 ops = netdev->netdev_ops;
295 if (ops->ndo_fcoe_enable) {
296 if (ops->ndo_fcoe_enable(netdev))
297 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
298 " specific feature for LLD.\n");
301 /* Do not support for bonding device */
302 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
303 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
307 /* look for SAN MAC address, if multiple SAN MACs exist, only
308 * use the first one for SPMA */
309 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
310 vlan_dev_real_dev(netdev) : netdev;
311 fcoe->realdev = real_dev;
313 for_each_dev_addr(real_dev, ha) {
314 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
315 (is_valid_ether_addr(ha->addr))) {
316 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
323 /* setup Source Mac Address */
325 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
328 * Add FCoE MAC address as second unicast MAC address
329 * or enter promiscuous mode if not capable of listening
330 * for multiple unicast MACs.
332 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
333 dev_uc_add(netdev, flogi_maddr);
335 dev_uc_add(netdev, fip->ctl_src_addr);
336 if (fip->mode == FIP_MODE_VN2VN) {
337 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
338 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
340 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
343 * setup the receive function from ethernet driver
344 * on the ethertype for the given device
346 fcoe->fcoe_packet_type.func = fcoe_rcv;
347 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
348 fcoe->fcoe_packet_type.dev = netdev;
349 dev_add_pack(&fcoe->fcoe_packet_type);
351 fcoe->fip_packet_type.func = fcoe_fip_recv;
352 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
353 fcoe->fip_packet_type.dev = netdev;
354 dev_add_pack(&fcoe->fip_packet_type);
360 * fcoe_interface_create() - Create a FCoE interface on a net device
361 * @netdev: The net device to create the FCoE interface on
362 * @fip_mode: The mode to use for FIP
364 * Returns: pointer to a struct fcoe_interface or NULL on error
366 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
367 enum fip_state fip_mode)
369 struct fcoe_interface *fcoe;
372 if (!try_module_get(THIS_MODULE)) {
373 FCOE_NETDEV_DBG(netdev,
374 "Could not get a reference to the module\n");
375 fcoe = ERR_PTR(-EBUSY);
379 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
381 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
382 fcoe = ERR_PTR(-ENOMEM);
391 fcoe_ctlr_init(&fcoe->ctlr, fip_mode);
392 fcoe->ctlr.send = fcoe_fip_send;
393 fcoe->ctlr.update_mac = fcoe_update_src_mac;
394 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
396 err = fcoe_interface_setup(fcoe, netdev);
398 fcoe_ctlr_destroy(&fcoe->ctlr);
408 module_put(THIS_MODULE);
414 * fcoe_interface_cleanup() - Clean up a FCoE interface
415 * @fcoe: The FCoE interface to be cleaned up
417 * Caller must be holding the RTNL mutex
419 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
421 struct net_device *netdev = fcoe->netdev;
422 struct fcoe_ctlr *fip = &fcoe->ctlr;
423 u8 flogi_maddr[ETH_ALEN];
424 const struct net_device_ops *ops;
429 * Don't listen for Ethernet packets anymore.
430 * synchronize_net() ensures that the packet handlers are not running
431 * on another CPU. dev_remove_pack() would do that, this calls the
432 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
434 __dev_remove_pack(&fcoe->fcoe_packet_type);
435 __dev_remove_pack(&fcoe->fip_packet_type);
438 /* Delete secondary MAC addresses */
439 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
440 dev_uc_del(netdev, flogi_maddr);
442 dev_uc_del(netdev, fip->ctl_src_addr);
443 if (fip->mode == FIP_MODE_VN2VN) {
444 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
445 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
447 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
449 /* Tell the LLD we are done w/ FCoE */
450 ops = netdev->netdev_ops;
451 if (ops->ndo_fcoe_disable) {
452 if (ops->ndo_fcoe_disable(netdev))
453 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
454 " specific feature for LLD.\n");
459 /* Release the self-reference taken during fcoe_interface_create() */
460 /* tear-down the FCoE controller */
461 fcoe_ctlr_destroy(fip);
464 module_put(THIS_MODULE);
468 * fcoe_fip_recv() - Handler for received FIP frames
469 * @skb: The receive skb
470 * @netdev: The associated net device
471 * @ptype: The packet_type structure which was used to register this handler
472 * @orig_dev: The original net_device the the skb was received on.
473 * (in case dev is a bond)
475 * Returns: 0 for success
477 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
478 struct packet_type *ptype,
479 struct net_device *orig_dev)
481 struct fcoe_interface *fcoe;
483 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
484 fcoe_ctlr_recv(&fcoe->ctlr, skb);
489 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
490 * @port: The FCoE port
491 * @skb: The FIP/FCoE packet to be sent
493 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
495 if (port->fcoe_pending_queue.qlen)
496 fcoe_check_wait_queue(port->lport, skb);
497 else if (fcoe_start_io(skb))
498 fcoe_check_wait_queue(port->lport, skb);
502 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
503 * @fip: The FCoE controller
504 * @skb: The FIP packet to be sent
506 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
508 skb->dev = fcoe_from_ctlr(fip)->netdev;
509 fcoe_port_send(lport_priv(fip->lp), skb);
513 * fcoe_update_src_mac() - Update the Ethernet MAC filters
514 * @lport: The local port to update the source MAC on
515 * @addr: Unicast MAC address to add
517 * Remove any previously-set unicast MAC filter.
518 * Add secondary FCoE MAC address filter for our OUI.
520 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
522 struct fcoe_port *port = lport_priv(lport);
523 struct fcoe_interface *fcoe = port->priv;
526 if (!is_zero_ether_addr(port->data_src_addr))
527 dev_uc_del(fcoe->netdev, port->data_src_addr);
528 if (!is_zero_ether_addr(addr))
529 dev_uc_add(fcoe->netdev, addr);
530 memcpy(port->data_src_addr, addr, ETH_ALEN);
535 * fcoe_get_src_mac() - return the Ethernet source address for an lport
536 * @lport: libfc lport
538 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
540 struct fcoe_port *port = lport_priv(lport);
542 return port->data_src_addr;
546 * fcoe_lport_config() - Set up a local port
547 * @lport: The local port to be setup
549 * Returns: 0 for success
551 static int fcoe_lport_config(struct fc_lport *lport)
555 lport->max_retry_count = 3;
556 lport->max_rport_retry_count = 3;
557 lport->e_d_tov = 2 * 1000; /* FC-FS default */
558 lport->r_a_tov = 2 * 2 * 1000;
559 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
560 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
561 lport->does_npiv = 1;
563 fc_lport_init_stats(lport);
565 /* lport fc_lport related configuration */
566 fc_lport_config(lport);
568 /* offload related configuration */
569 lport->crc_offload = 0;
570 lport->seq_offload = 0;
571 lport->lro_enabled = 0;
579 * fcoe_netdev_features_change - Updates the lport's offload flags based
580 * on the LLD netdev's FCoE feature flags
582 static void fcoe_netdev_features_change(struct fc_lport *lport,
583 struct net_device *netdev)
585 mutex_lock(&lport->lp_mutex);
587 if (netdev->features & NETIF_F_SG)
592 if (netdev->features & NETIF_F_FCOE_CRC) {
593 lport->crc_offload = 1;
594 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
596 lport->crc_offload = 0;
599 if (netdev->features & NETIF_F_FSO) {
600 lport->seq_offload = 1;
601 lport->lso_max = netdev->gso_max_size;
602 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
605 lport->seq_offload = 0;
609 if (netdev->fcoe_ddp_xid) {
610 lport->lro_enabled = 1;
611 lport->lro_xid = netdev->fcoe_ddp_xid;
612 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
615 lport->lro_enabled = 0;
619 mutex_unlock(&lport->lp_mutex);
623 * fcoe_netdev_config() - Set up net devive for SW FCoE
624 * @lport: The local port that is associated with the net device
625 * @netdev: The associated net device
627 * Must be called after fcoe_lport_config() as it will use local port mutex
629 * Returns: 0 for success
631 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
635 struct fcoe_interface *fcoe;
636 struct fcoe_port *port;
638 /* Setup lport private data to point to fcoe softc */
639 port = lport_priv(lport);
643 * Determine max frame size based on underlying device and optional
644 * user-configured limit. If the MFS is too low, fcoe_link_ok()
645 * will return 0, so do this first.
648 if (netdev->features & NETIF_F_FCOE_MTU) {
650 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
652 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
653 if (fc_set_mfs(lport, mfs))
656 /* offload features support */
657 fcoe_netdev_features_change(lport, netdev);
659 skb_queue_head_init(&port->fcoe_pending_queue);
660 port->fcoe_pending_queue_active = 0;
661 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
663 fcoe_link_speed_update(lport);
666 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
667 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
668 fc_set_wwnn(lport, wwnn);
669 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
670 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr,
672 fc_set_wwpn(lport, wwpn);
679 * fcoe_shost_config() - Set up the SCSI host associated with a local port
680 * @lport: The local port
681 * @dev: The device associated with the SCSI host
683 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
685 * Returns: 0 for success
687 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
691 /* lport scsi host config */
692 lport->host->max_lun = FCOE_MAX_LUN;
693 lport->host->max_id = FCOE_MAX_FCP_TARGET;
694 lport->host->max_channel = 0;
695 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
698 lport->host->transportt = fcoe_vport_scsi_transport;
700 lport->host->transportt = fcoe_nport_scsi_transport;
702 /* add the new host to the SCSI-ml */
703 rc = scsi_add_host(lport->host, dev);
705 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
706 "error on scsi_add_host\n");
711 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
713 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
714 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
715 fcoe_netdev(lport)->name);
722 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
723 * @lport: The local port that is associated with the net device
724 * @netdev: The associated net device
726 * Must be called after fcoe_shost_config() as it will use local port mutex
729 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
731 struct fcoe_interface *fcoe;
732 struct fcoe_port *port;
733 struct net_device *realdev;
735 struct netdev_fcoe_hbainfo fdmi;
737 port = lport_priv(lport);
739 realdev = fcoe->realdev;
744 /* No FDMI state m/c for NPIV ports */
748 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
749 memset(&fdmi, 0, sizeof(fdmi));
750 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
753 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
754 "information from netdev.\n");
758 snprintf(fc_host_serial_number(lport->host),
759 FC_SERIAL_NUMBER_SIZE,
762 snprintf(fc_host_manufacturer(lport->host),
763 FC_SERIAL_NUMBER_SIZE,
766 snprintf(fc_host_model(lport->host),
767 FC_SYMBOLIC_NAME_SIZE,
770 snprintf(fc_host_model_description(lport->host),
771 FC_SYMBOLIC_NAME_SIZE,
773 fdmi.model_description);
774 snprintf(fc_host_hardware_version(lport->host),
775 FC_VERSION_STRING_SIZE,
777 fdmi.hardware_version);
778 snprintf(fc_host_driver_version(lport->host),
779 FC_VERSION_STRING_SIZE,
781 fdmi.driver_version);
782 snprintf(fc_host_optionrom_version(lport->host),
783 FC_VERSION_STRING_SIZE,
785 fdmi.optionrom_version);
786 snprintf(fc_host_firmware_version(lport->host),
787 FC_VERSION_STRING_SIZE,
789 fdmi.firmware_version);
791 /* Enable FDMI lport states */
792 lport->fdmi_enabled = 1;
794 lport->fdmi_enabled = 0;
795 printk(KERN_INFO "fcoe: No FDMI support.\n");
800 * fcoe_oem_match() - The match routine for the offloaded exchange manager
803 * This routine will be associated with an exchange manager (EM). When
804 * the libfc exchange handling code is looking for an EM to use it will
805 * call this routine and pass it the frame that it wishes to send. This
806 * routine will return True if the associated EM is to be used and False
807 * if the echange code should continue looking for an EM.
809 * The offload EM that this routine is associated with will handle any
810 * packets that are for SCSI read requests.
812 * This has been enhanced to work when FCoE stack is operating in target
815 * Returns: True for read types I/O, otherwise returns false.
817 static bool fcoe_oem_match(struct fc_frame *fp)
819 struct fc_frame_header *fh = fc_frame_header_get(fp);
820 struct fcp_cmnd *fcp;
822 if (fc_fcp_is_read(fr_fsp(fp)) &&
823 (fr_fsp(fp)->data_len > fcoe_ddp_min))
825 else if ((fr_fsp(fp) == NULL) &&
826 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
827 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
828 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
829 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
830 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
837 * fcoe_em_config() - Allocate and configure an exchange manager
838 * @lport: The local port that the new EM will be associated with
840 * Returns: 0 on success
842 static inline int fcoe_em_config(struct fc_lport *lport)
844 struct fcoe_port *port = lport_priv(lport);
845 struct fcoe_interface *fcoe = port->priv;
846 struct fcoe_interface *oldfcoe = NULL;
847 struct net_device *old_real_dev, *cur_real_dev;
848 u16 min_xid = FCOE_MIN_XID;
849 u16 max_xid = FCOE_MAX_XID;
852 * Check if need to allocate an em instance for
853 * offload exchange ids to be shared across all VN_PORTs/lport.
855 if (!lport->lro_enabled || !lport->lro_xid ||
856 (lport->lro_xid >= max_xid)) {
862 * Reuse existing offload em instance in case
863 * it is already allocated on real eth device
865 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
866 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
868 cur_real_dev = fcoe->netdev;
870 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
871 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
872 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
874 old_real_dev = oldfcoe->netdev;
876 if (cur_real_dev == old_real_dev) {
877 fcoe->oem = oldfcoe->oem;
883 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
884 printk(KERN_ERR "fcoe_em_config: failed to add "
885 "offload em:%p on interface:%s\n",
886 fcoe->oem, fcoe->netdev->name);
890 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
891 FCOE_MIN_XID, lport->lro_xid,
894 printk(KERN_ERR "fcoe_em_config: failed to allocate "
895 "em for offload exches on interface:%s\n",
902 * Exclude offload EM xid range from next EM xid range.
904 min_xid += lport->lro_xid + 1;
907 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
908 printk(KERN_ERR "fcoe_em_config: failed to "
909 "allocate em on interface %s\n", fcoe->netdev->name);
917 * fcoe_if_destroy() - Tear down a SW FCoE instance
918 * @lport: The local port to be destroyed
921 static void fcoe_if_destroy(struct fc_lport *lport)
923 struct fcoe_port *port = lport_priv(lport);
924 struct fcoe_interface *fcoe = port->priv;
925 struct net_device *netdev = fcoe->netdev;
927 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
929 /* Logout of the fabric */
930 fc_fabric_logoff(lport);
932 /* Cleanup the fc_lport */
933 fc_lport_destroy(lport);
935 /* Stop the transmit retry timer */
936 del_timer_sync(&port->timer);
938 /* Free existing transmit skbs */
939 fcoe_clean_pending_queue(lport);
942 if (!is_zero_ether_addr(port->data_src_addr))
943 dev_uc_del(netdev, port->data_src_addr);
946 /* Free queued packets for the per-CPU receive threads */
947 fcoe_percpu_clean(lport);
949 /* Detach from the scsi-ml */
950 fc_remove_host(lport->host);
951 scsi_remove_host(lport->host);
953 /* Destroy lport scsi_priv */
954 fc_fcp_destroy(lport);
956 /* There are no more rports or I/O, free the EM */
957 fc_exch_mgr_free(lport);
959 /* Free memory used by statistical counters */
960 fc_lport_free_stats(lport);
962 /* Release the Scsi_Host */
963 scsi_host_put(lport->host);
967 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
968 * @lport: The local port to setup DDP for
969 * @xid: The exchange ID for this DDP transfer
970 * @sgl: The scatterlist describing this transfer
971 * @sgc: The number of sg items
973 * Returns: 0 if the DDP context was not configured
975 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
976 struct scatterlist *sgl, unsigned int sgc)
978 struct net_device *netdev = fcoe_netdev(lport);
980 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
981 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
989 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
990 * @lport: The local port to setup DDP for
991 * @xid: The exchange ID for this DDP transfer
992 * @sgl: The scatterlist describing this transfer
993 * @sgc: The number of sg items
995 * Returns: 0 if the DDP context was not configured
997 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
998 struct scatterlist *sgl, unsigned int sgc)
1000 struct net_device *netdev = fcoe_netdev(lport);
1002 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1003 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1011 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1012 * @lport: The local port to complete DDP on
1013 * @xid: The exchange ID for this DDP transfer
1015 * Returns: the length of data that have been completed by DDP
1017 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1019 struct net_device *netdev = fcoe_netdev(lport);
1021 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1022 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1027 * fcoe_if_create() - Create a FCoE instance on an interface
1028 * @fcoe: The FCoE interface to create a local port on
1029 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1030 * @npiv: Indicates if the port is a vport or not
1032 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1034 * Returns: The allocated fc_lport or an error pointer
1036 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1037 struct device *parent, int npiv)
1039 struct net_device *netdev = fcoe->netdev;
1040 struct fc_lport *lport, *n_port;
1041 struct fcoe_port *port;
1042 struct Scsi_Host *shost;
1045 * parent is only a vport if npiv is 1,
1046 * but we'll only use vport in that case so go ahead and set it
1048 struct fc_vport *vport = dev_to_vport(parent);
1050 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1053 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1055 lport = libfc_vport_create(vport, sizeof(*port));
1058 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1062 port = lport_priv(lport);
1063 port->lport = lport;
1065 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1066 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1067 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1069 /* configure a fc_lport including the exchange manager */
1070 rc = fcoe_lport_config(lport);
1072 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1078 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1079 "%16.16llx %16.16llx\n",
1080 vport->node_name, vport->port_name);
1081 fc_set_wwnn(lport, vport->node_name);
1082 fc_set_wwpn(lport, vport->port_name);
1085 /* configure lport network properties */
1086 rc = fcoe_netdev_config(lport, netdev);
1088 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1090 goto out_lp_destroy;
1093 /* configure lport scsi host properties */
1094 rc = fcoe_shost_config(lport, parent);
1096 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1098 goto out_lp_destroy;
1101 /* Initialize the library */
1102 rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1);
1104 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1106 goto out_lp_destroy;
1109 /* Initialized FDMI information */
1110 fcoe_fdmi_info(lport, netdev);
1113 * fcoe_em_alloc() and fcoe_hostlist_add() both
1114 * need to be atomic with respect to other changes to the
1115 * hostlist since fcoe_em_alloc() looks for an existing EM
1116 * instance on host list updated by fcoe_hostlist_add().
1118 * This is currently handled through the fcoe_config_mutex
1122 /* lport exch manager allocation */
1123 rc = fcoe_em_config(lport);
1125 shost = vport_to_shost(vport);
1126 n_port = shost_priv(shost);
1127 rc = fc_exch_mgr_list_clone(n_port, lport);
1131 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1132 goto out_lp_destroy;
1138 fc_exch_mgr_free(lport);
1140 scsi_host_put(lport->host);
1146 * fcoe_if_init() - Initialization routine for fcoe.ko
1148 * Attaches the SW FCoE transport to the FC transport
1150 * Returns: 0 on success
1152 static int __init fcoe_if_init(void)
1154 /* attach to scsi transport */
1155 fcoe_nport_scsi_transport =
1156 fc_attach_transport(&fcoe_nport_fc_functions);
1157 fcoe_vport_scsi_transport =
1158 fc_attach_transport(&fcoe_vport_fc_functions);
1160 if (!fcoe_nport_scsi_transport) {
1161 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1169 * fcoe_if_exit() - Tear down fcoe.ko
1171 * Detaches the SW FCoE transport from the FC transport
1173 * Returns: 0 on success
1175 static int __exit fcoe_if_exit(void)
1177 fc_release_transport(fcoe_nport_scsi_transport);
1178 fc_release_transport(fcoe_vport_scsi_transport);
1179 fcoe_nport_scsi_transport = NULL;
1180 fcoe_vport_scsi_transport = NULL;
1185 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1186 * @cpu: The CPU index of the CPU to create a receive thread for
1188 static void fcoe_percpu_thread_create(unsigned int cpu)
1190 struct fcoe_percpu_s *p;
1191 struct task_struct *thread;
1193 p = &per_cpu(fcoe_percpu, cpu);
1195 thread = kthread_create_on_node(fcoe_percpu_receive_thread,
1196 (void *)p, cpu_to_node(cpu),
1197 "fcoethread/%d", cpu);
1199 if (likely(!IS_ERR(thread))) {
1200 kthread_bind(thread, cpu);
1201 wake_up_process(thread);
1203 spin_lock_bh(&p->fcoe_rx_list.lock);
1205 spin_unlock_bh(&p->fcoe_rx_list.lock);
1210 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1211 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1213 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1214 * current CPU's Rx thread. If the thread being destroyed is bound to
1215 * the CPU processing this context the skbs will be freed.
1217 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1219 struct fcoe_percpu_s *p;
1220 struct task_struct *thread;
1221 struct page *crc_eof;
1222 struct sk_buff *skb;
1224 struct fcoe_percpu_s *p0;
1225 unsigned targ_cpu = get_cpu();
1226 #endif /* CONFIG_SMP */
1228 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1230 /* Prevent any new skbs from being queued for this CPU. */
1231 p = &per_cpu(fcoe_percpu, cpu);
1232 spin_lock_bh(&p->fcoe_rx_list.lock);
1235 crc_eof = p->crc_eof_page;
1236 p->crc_eof_page = NULL;
1237 p->crc_eof_offset = 0;
1238 spin_unlock_bh(&p->fcoe_rx_list.lock);
1242 * Don't bother moving the skb's if this context is running
1243 * on the same CPU that is having its thread destroyed. This
1244 * can easily happen when the module is removed.
1246 if (cpu != targ_cpu) {
1247 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1248 spin_lock_bh(&p0->fcoe_rx_list.lock);
1250 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1253 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1254 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1255 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1258 * The targeted CPU is not initialized and cannot accept
1259 * new skbs. Unlock the targeted CPU and drop the skbs
1260 * on the CPU that is going offline.
1262 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1264 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1268 * This scenario occurs when the module is being removed
1269 * and all threads are being destroyed. skbs will continue
1270 * to be shifted from the CPU thread that is being removed
1271 * to the CPU thread associated with the CPU that is processing
1272 * the module removal. Once there is only one CPU Rx thread it
1273 * will reach this case and we will drop all skbs and later
1276 spin_lock_bh(&p->fcoe_rx_list.lock);
1277 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1279 spin_unlock_bh(&p->fcoe_rx_list.lock);
1284 * This a non-SMP scenario where the singular Rx thread is
1285 * being removed. Free all skbs and stop the thread.
1287 spin_lock_bh(&p->fcoe_rx_list.lock);
1288 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1290 spin_unlock_bh(&p->fcoe_rx_list.lock);
1294 kthread_stop(thread);
1301 * fcoe_cpu_callback() - Handler for CPU hotplug events
1302 * @nfb: The callback data block
1303 * @action: The event triggering the callback
1304 * @hcpu: The index of the CPU that the event is for
1306 * This creates or destroys per-CPU data for fcoe
1308 * Returns NOTIFY_OK always.
1310 static int fcoe_cpu_callback(struct notifier_block *nfb,
1311 unsigned long action, void *hcpu)
1313 unsigned cpu = (unsigned long)hcpu;
1317 case CPU_ONLINE_FROZEN:
1318 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1319 fcoe_percpu_thread_create(cpu);
1322 case CPU_DEAD_FROZEN:
1323 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1324 fcoe_percpu_thread_destroy(cpu);
1333 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1336 * This routine selects next CPU based on cpumask to distribute
1337 * incoming requests in round robin.
1339 * Returns: int CPU number
1341 static inline unsigned int fcoe_select_cpu(void)
1343 static unsigned int selected_cpu;
1345 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1346 if (selected_cpu >= nr_cpu_ids)
1347 selected_cpu = cpumask_first(cpu_online_mask);
1349 return selected_cpu;
1353 * fcoe_rcv() - Receive packets from a net device
1354 * @skb: The received packet
1355 * @netdev: The net device that the packet was received on
1356 * @ptype: The packet type context
1357 * @olddev: The last device net device
1359 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1360 * FC frame and passes the frame to libfc.
1362 * Returns: 0 for success
1364 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1365 struct packet_type *ptype, struct net_device *olddev)
1367 struct fc_lport *lport;
1368 struct fcoe_rcv_info *fr;
1369 struct fcoe_interface *fcoe;
1370 struct fc_frame_header *fh;
1371 struct fcoe_percpu_s *fps;
1375 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1376 lport = fcoe->ctlr.lp;
1377 if (unlikely(!lport)) {
1378 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1381 if (!lport->link_up)
1384 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1385 "data:%p tail:%p end:%p sum:%d dev:%s",
1386 skb->len, skb->data_len, skb->head, skb->data,
1387 skb_tail_pointer(skb), skb_end_pointer(skb),
1388 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1392 if (is_fip_mode(&fcoe->ctlr) &&
1393 compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) {
1394 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1400 * Check for minimum frame length, and make sure required FCoE
1401 * and FC headers are pulled into the linear data area.
1403 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1404 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1407 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1408 fh = (struct fc_frame_header *) skb_transport_header(skb);
1410 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1411 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1416 fr = fcoe_dev_from_skb(skb);
1420 * In case the incoming frame's exchange is originated from
1421 * the initiator, then received frame's exchange id is ANDed
1422 * with fc_cpu_mask bits to get the same cpu on which exchange
1423 * was originated, otherwise select cpu using rx exchange id
1424 * or fcoe_select_cpu().
1426 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1427 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1429 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1430 cpu = fcoe_select_cpu();
1432 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1435 if (cpu >= nr_cpu_ids)
1438 fps = &per_cpu(fcoe_percpu, cpu);
1439 spin_lock(&fps->fcoe_rx_list.lock);
1440 if (unlikely(!fps->thread)) {
1442 * The targeted CPU is not ready, let's target
1443 * the first CPU now. For non-SMP systems this
1444 * will check the same CPU twice.
1446 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1447 "ready for incoming skb- using first online "
1450 spin_unlock(&fps->fcoe_rx_list.lock);
1451 cpu = cpumask_first(cpu_online_mask);
1452 fps = &per_cpu(fcoe_percpu, cpu);
1453 spin_lock(&fps->fcoe_rx_list.lock);
1455 spin_unlock(&fps->fcoe_rx_list.lock);
1461 * We now have a valid CPU that we're targeting for
1462 * this skb. We also have this receive thread locked,
1463 * so we're free to queue skbs into it's queue.
1467 * Note: We used to have a set of conditions under which we would
1468 * call fcoe_recv_frame directly, rather than queuing to the rx list
1469 * as it could save a few cycles, but doing so is prohibited, as
1470 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1471 * in softirq context.
1473 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1474 if (fps->fcoe_rx_list.qlen == 1)
1475 wake_up_process(fps->thread);
1476 spin_unlock(&fps->fcoe_rx_list.lock);
1480 per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++;
1488 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1489 * @skb: The packet to be transmitted
1490 * @tlen: The total length of the trailer
1492 * Returns: 0 for success
1494 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1496 struct fcoe_percpu_s *fps;
1499 fps = &get_cpu_var(fcoe_percpu);
1500 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1501 put_cpu_var(fcoe_percpu);
1507 * fcoe_xmit() - Transmit a FCoE frame
1508 * @lport: The local port that the frame is to be transmitted for
1509 * @fp: The frame to be transmitted
1511 * Return: 0 for success
1513 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1518 struct fcoe_crc_eof *cp;
1519 struct sk_buff *skb;
1520 struct fcoe_dev_stats *stats;
1521 struct fc_frame_header *fh;
1522 unsigned int hlen; /* header length implies the version */
1523 unsigned int tlen; /* trailer length */
1524 unsigned int elen; /* eth header, may include vlan */
1525 struct fcoe_port *port = lport_priv(lport);
1526 struct fcoe_interface *fcoe = port->priv;
1528 struct fcoe_hdr *hp;
1530 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1532 fh = fc_frame_header_get(fp);
1534 wlen = skb->len / FCOE_WORD_TO_BYTE;
1536 if (!lport->link_up) {
1541 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1542 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1548 elen = sizeof(struct ethhdr);
1549 hlen = sizeof(struct fcoe_hdr);
1550 tlen = sizeof(struct fcoe_crc_eof);
1551 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1554 if (likely(lport->crc_offload)) {
1555 skb->ip_summed = CHECKSUM_PARTIAL;
1556 skb->csum_start = skb_headroom(skb);
1557 skb->csum_offset = skb->len;
1560 skb->ip_summed = CHECKSUM_NONE;
1561 crc = fcoe_fc_crc(fp);
1564 /* copy port crc and eof to the skb buff */
1565 if (skb_is_nonlinear(skb)) {
1567 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1571 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1572 cp = kmap_atomic(skb_frag_page(frag), KM_SKB_DATA_SOFTIRQ)
1573 + frag->page_offset;
1575 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1578 memset(cp, 0, sizeof(*cp));
1580 cp->fcoe_crc32 = cpu_to_le32(~crc);
1582 if (skb_is_nonlinear(skb)) {
1583 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1587 /* adjust skb network/transport offsets to match mac/fcoe/port */
1588 skb_push(skb, elen + hlen);
1589 skb_reset_mac_header(skb);
1590 skb_reset_network_header(skb);
1591 skb->mac_len = elen;
1592 skb->protocol = htons(ETH_P_FCOE);
1593 skb->priority = port->priority;
1595 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
1596 fcoe->realdev->features & NETIF_F_HW_VLAN_TX) {
1597 skb->vlan_tci = VLAN_TAG_PRESENT |
1598 vlan_dev_vlan_id(fcoe->netdev);
1599 skb->dev = fcoe->realdev;
1601 skb->dev = fcoe->netdev;
1603 /* fill up mac and fcoe headers */
1605 eh->h_proto = htons(ETH_P_FCOE);
1606 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1607 if (fcoe->ctlr.map_dest)
1608 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1610 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1611 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1613 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1615 hp = (struct fcoe_hdr *)(eh + 1);
1616 memset(hp, 0, sizeof(*hp));
1618 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1621 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1622 if (lport->seq_offload && fr_max_payload(fp)) {
1623 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1624 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1626 skb_shinfo(skb)->gso_type = 0;
1627 skb_shinfo(skb)->gso_size = 0;
1629 /* update tx stats: regardless if LLD fails */
1630 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1632 stats->TxWords += wlen;
1635 /* send down to lld */
1637 fcoe_port_send(port, skb);
1642 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1643 * @skb: The completed skb (argument required by destructor)
1645 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1647 complete(&fcoe_flush_completion);
1651 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1652 * @lport: The local port the frame was received on
1653 * @fp: The received frame
1655 * Return: 0 on passing filtering checks
1657 static inline int fcoe_filter_frames(struct fc_lport *lport,
1658 struct fc_frame *fp)
1660 struct fcoe_interface *fcoe;
1661 struct fc_frame_header *fh;
1662 struct sk_buff *skb = (struct sk_buff *)fp;
1663 struct fcoe_dev_stats *stats;
1666 * We only check CRC if no offload is available and if it is
1667 * it's solicited data, in which case, the FCP layer would
1668 * check it during the copy.
1670 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1671 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1673 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1675 fh = (struct fc_frame_header *) skb_transport_header(skb);
1676 fh = fc_frame_header_get(fp);
1677 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1680 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1681 if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1682 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1683 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1687 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1688 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1689 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1693 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1694 stats->InvalidCRCCount++;
1695 if (stats->InvalidCRCCount < 5)
1696 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1702 * fcoe_recv_frame() - process a single received frame
1703 * @skb: frame to process
1705 static void fcoe_recv_frame(struct sk_buff *skb)
1708 struct fc_lport *lport;
1709 struct fcoe_rcv_info *fr;
1710 struct fcoe_dev_stats *stats;
1711 struct fcoe_crc_eof crc_eof;
1712 struct fc_frame *fp;
1713 struct fcoe_port *port;
1714 struct fcoe_hdr *hp;
1716 fr = fcoe_dev_from_skb(skb);
1718 if (unlikely(!lport)) {
1719 if (skb->destructor != fcoe_percpu_flush_done)
1720 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1725 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1726 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1727 skb->len, skb->data_len,
1728 skb->head, skb->data, skb_tail_pointer(skb),
1729 skb_end_pointer(skb), skb->csum,
1730 skb->dev ? skb->dev->name : "<NULL>");
1732 port = lport_priv(lport);
1733 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
1736 * Frame length checks and setting up the header pointers
1737 * was done in fcoe_rcv already.
1739 hp = (struct fcoe_hdr *) skb_network_header(skb);
1741 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1742 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1743 if (stats->ErrorFrames < 5)
1744 printk(KERN_WARNING "fcoe: FCoE version "
1745 "mismatch: The frame has "
1746 "version %x, but the "
1747 "initiator supports version "
1748 "%x\n", FC_FCOE_DECAPS_VER(hp),
1753 skb_pull(skb, sizeof(struct fcoe_hdr));
1754 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1757 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1759 fp = (struct fc_frame *)skb;
1762 fr_sof(fp) = hp->fcoe_sof;
1764 /* Copy out the CRC and EOF trailer for access */
1765 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1767 fr_eof(fp) = crc_eof.fcoe_eof;
1768 fr_crc(fp) = crc_eof.fcoe_crc32;
1769 if (pskb_trim(skb, fr_len))
1772 if (!fcoe_filter_frames(lport, fp)) {
1774 fc_exch_recv(lport, fp);
1778 stats->ErrorFrames++;
1784 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1785 * @arg: The per-CPU context
1787 * Return: 0 for success
1789 static int fcoe_percpu_receive_thread(void *arg)
1791 struct fcoe_percpu_s *p = arg;
1792 struct sk_buff *skb;
1794 set_user_nice(current, -20);
1796 while (!kthread_should_stop()) {
1798 spin_lock_bh(&p->fcoe_rx_list.lock);
1799 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1800 set_current_state(TASK_INTERRUPTIBLE);
1801 spin_unlock_bh(&p->fcoe_rx_list.lock);
1803 set_current_state(TASK_RUNNING);
1804 if (kthread_should_stop())
1806 spin_lock_bh(&p->fcoe_rx_list.lock);
1808 spin_unlock_bh(&p->fcoe_rx_list.lock);
1809 fcoe_recv_frame(skb);
1815 * fcoe_dev_setup() - Setup the link change notification interface
1817 static void fcoe_dev_setup(void)
1819 register_dcbevent_notifier(&dcb_notifier);
1820 register_netdevice_notifier(&fcoe_notifier);
1824 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1826 static void fcoe_dev_cleanup(void)
1828 unregister_dcbevent_notifier(&dcb_notifier);
1829 unregister_netdevice_notifier(&fcoe_notifier);
1832 static struct fcoe_interface *
1833 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1835 struct fcoe_interface *fcoe;
1836 struct net_device *real_dev;
1838 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1839 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1840 real_dev = vlan_dev_real_dev(fcoe->netdev);
1842 real_dev = fcoe->netdev;
1844 if (netdev == real_dev)
1850 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1851 ulong event, void *ptr)
1853 struct dcb_app_type *entry = ptr;
1854 struct fcoe_interface *fcoe;
1855 struct net_device *netdev;
1856 struct fcoe_port *port;
1859 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1862 netdev = dev_get_by_index(&init_net, entry->ifindex);
1866 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1871 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1872 prio = ffs(entry->app.priority) - 1;
1874 prio = entry->app.priority;
1879 if (entry->app.protocol == ETH_P_FIP ||
1880 entry->app.protocol == ETH_P_FCOE)
1881 fcoe->ctlr.priority = prio;
1883 if (entry->app.protocol == ETH_P_FCOE) {
1884 port = lport_priv(fcoe->ctlr.lp);
1885 port->priority = prio;
1892 * fcoe_device_notification() - Handler for net device events
1893 * @notifier: The context of the notification
1894 * @event: The type of event
1895 * @ptr: The net device that the event was on
1897 * This function is called by the Ethernet driver in case of link change event.
1899 * Returns: 0 for success
1901 static int fcoe_device_notification(struct notifier_block *notifier,
1902 ulong event, void *ptr)
1904 struct fc_lport *lport = NULL;
1905 struct net_device *netdev = ptr;
1906 struct fcoe_interface *fcoe;
1907 struct fcoe_port *port;
1908 struct fcoe_dev_stats *stats;
1909 u32 link_possible = 1;
1913 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1914 if (fcoe->netdev == netdev) {
1915 lport = fcoe->ctlr.lp;
1926 case NETDEV_GOING_DOWN:
1932 case NETDEV_CHANGEMTU:
1933 if (netdev->features & NETIF_F_FCOE_MTU)
1935 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1936 sizeof(struct fcoe_crc_eof));
1937 if (mfs >= FC_MIN_MAX_FRAME)
1938 fc_set_mfs(lport, mfs);
1940 case NETDEV_REGISTER:
1942 case NETDEV_UNREGISTER:
1943 list_del(&fcoe->list);
1944 port = lport_priv(fcoe->ctlr.lp);
1945 queue_work(fcoe_wq, &port->destroy_work);
1948 case NETDEV_FEAT_CHANGE:
1949 fcoe_netdev_features_change(lport, netdev);
1952 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1953 "from netdev netlink\n", event);
1956 fcoe_link_speed_update(lport);
1958 if (link_possible && !fcoe_link_ok(lport))
1959 fcoe_ctlr_link_up(&fcoe->ctlr);
1960 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1961 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1962 stats->LinkFailureCount++;
1964 fcoe_clean_pending_queue(lport);
1971 * fcoe_disable() - Disables a FCoE interface
1972 * @netdev : The net_device object the Ethernet interface to create on
1974 * Called from fcoe transport.
1976 * Returns: 0 for success
1978 static int fcoe_disable(struct net_device *netdev)
1980 struct fcoe_interface *fcoe;
1983 mutex_lock(&fcoe_config_mutex);
1986 fcoe = fcoe_hostlist_lookup_port(netdev);
1990 fcoe_ctlr_link_down(&fcoe->ctlr);
1991 fcoe_clean_pending_queue(fcoe->ctlr.lp);
1995 mutex_unlock(&fcoe_config_mutex);
2000 * fcoe_enable() - Enables a FCoE interface
2001 * @netdev : The net_device object the Ethernet interface to create on
2003 * Called from fcoe transport.
2005 * Returns: 0 for success
2007 static int fcoe_enable(struct net_device *netdev)
2009 struct fcoe_interface *fcoe;
2012 mutex_lock(&fcoe_config_mutex);
2014 fcoe = fcoe_hostlist_lookup_port(netdev);
2019 else if (!fcoe_link_ok(fcoe->ctlr.lp))
2020 fcoe_ctlr_link_up(&fcoe->ctlr);
2022 mutex_unlock(&fcoe_config_mutex);
2027 * fcoe_destroy() - Destroy a FCoE interface
2028 * @netdev : The net_device object the Ethernet interface to create on
2030 * Called from fcoe transport
2032 * Returns: 0 for success
2034 static int fcoe_destroy(struct net_device *netdev)
2036 struct fcoe_interface *fcoe;
2037 struct fc_lport *lport;
2038 struct fcoe_port *port;
2041 mutex_lock(&fcoe_config_mutex);
2043 fcoe = fcoe_hostlist_lookup_port(netdev);
2048 lport = fcoe->ctlr.lp;
2049 port = lport_priv(lport);
2050 list_del(&fcoe->list);
2051 queue_work(fcoe_wq, &port->destroy_work);
2054 mutex_unlock(&fcoe_config_mutex);
2059 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2060 * @work: Handle to the FCoE port to be destroyed
2062 static void fcoe_destroy_work(struct work_struct *work)
2064 struct fcoe_port *port;
2065 struct fcoe_interface *fcoe;
2067 port = container_of(work, struct fcoe_port, destroy_work);
2068 mutex_lock(&fcoe_config_mutex);
2071 fcoe_if_destroy(port->lport);
2072 fcoe_interface_cleanup(fcoe);
2074 mutex_unlock(&fcoe_config_mutex);
2078 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2079 * @netdev : The net_device object the Ethernet interface to create on
2081 * Called from fcoe transport.
2083 * Returns: always returns true as this is the default FCoE transport,
2084 * i.e., support all netdevs.
2086 static bool fcoe_match(struct net_device *netdev)
2092 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2093 * @netdev: The net_device object of the L2 link that should be queried
2094 * @port: The fcoe_port to bind FCoE APP priority with
2097 static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2102 struct net_device *netdev = fcoe->realdev;
2103 struct fcoe_port *port = lport_priv(fcoe->ctlr.lp);
2104 struct dcb_app app = {
2106 .protocol = ETH_P_FCOE
2109 /* setup DCB priority attributes. */
2110 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2111 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2113 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2114 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2115 up = dcb_ieee_getapp_mask(netdev, &app);
2116 app.protocol = ETH_P_FIP;
2117 fup = dcb_ieee_getapp_mask(netdev, &app);
2119 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2120 up = dcb_getapp(netdev, &app);
2121 app.protocol = ETH_P_FIP;
2122 fup = dcb_getapp(netdev, &app);
2125 port->priority = ffs(up) ? ffs(up) - 1 : 0;
2126 fcoe->ctlr.priority = ffs(fup) ? ffs(fup) - 1 : port->priority;
2132 * fcoe_create() - Create a fcoe interface
2133 * @netdev : The net_device object the Ethernet interface to create on
2134 * @fip_mode: The FIP mode for this creation
2136 * Called from fcoe transport
2138 * Returns: 0 for success
2140 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
2143 struct fcoe_interface *fcoe;
2144 struct fc_lport *lport;
2146 mutex_lock(&fcoe_config_mutex);
2149 /* look for existing lport */
2150 if (fcoe_hostlist_lookup(netdev)) {
2155 fcoe = fcoe_interface_create(netdev, fip_mode);
2161 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
2162 if (IS_ERR(lport)) {
2163 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2167 fcoe_interface_cleanup(fcoe);
2171 /* Make this the "master" N_Port */
2172 fcoe->ctlr.lp = lport;
2174 /* setup DCB priority attributes. */
2175 fcoe_dcb_create(fcoe);
2177 /* add to lports list */
2178 fcoe_hostlist_add(lport);
2180 /* start FIP Discovery and FLOGI */
2181 lport->boot_time = jiffies;
2182 fc_fabric_login(lport);
2183 if (!fcoe_link_ok(lport))
2184 fcoe_ctlr_link_up(&fcoe->ctlr);
2189 mutex_unlock(&fcoe_config_mutex);
2194 * fcoe_link_speed_update() - Update the supported and actual link speeds
2195 * @lport: The local port to update speeds for
2197 * Returns: 0 if the ethtool query was successful
2198 * -1 if the ethtool query failed
2200 static int fcoe_link_speed_update(struct fc_lport *lport)
2202 struct net_device *netdev = fcoe_netdev(lport);
2203 struct ethtool_cmd ecmd;
2205 if (!__ethtool_get_settings(netdev, &ecmd)) {
2206 lport->link_supported_speeds &=
2207 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
2208 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
2209 SUPPORTED_1000baseT_Full))
2210 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
2211 if (ecmd.supported & SUPPORTED_10000baseT_Full)
2212 lport->link_supported_speeds |=
2213 FC_PORTSPEED_10GBIT;
2214 switch (ethtool_cmd_speed(&ecmd)) {
2216 lport->link_speed = FC_PORTSPEED_1GBIT;
2219 lport->link_speed = FC_PORTSPEED_10GBIT;
2228 * fcoe_link_ok() - Check if the link is OK for a local port
2229 * @lport: The local port to check link on
2231 * Returns: 0 if link is UP and OK, -1 if not
2234 static int fcoe_link_ok(struct fc_lport *lport)
2236 struct net_device *netdev = fcoe_netdev(lport);
2238 if (netif_oper_up(netdev))
2244 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2245 * @lport: The local port whose skbs are to be cleared
2247 * Must be called with fcoe_create_mutex held to single-thread completion.
2249 * This flushes the pending skbs by adding a new skb to each queue and
2250 * waiting until they are all freed. This assures us that not only are
2251 * there no packets that will be handled by the lport, but also that any
2252 * threads already handling packet have returned.
2254 static void fcoe_percpu_clean(struct fc_lport *lport)
2256 struct fcoe_percpu_s *pp;
2257 struct fcoe_rcv_info *fr;
2258 struct sk_buff_head *list;
2259 struct sk_buff *skb, *next;
2260 struct sk_buff *head;
2263 for_each_possible_cpu(cpu) {
2264 pp = &per_cpu(fcoe_percpu, cpu);
2265 spin_lock_bh(&pp->fcoe_rx_list.lock);
2266 list = &pp->fcoe_rx_list;
2268 for (skb = head; skb != (struct sk_buff *)list;
2271 fr = fcoe_dev_from_skb(skb);
2272 if (fr->fr_dev == lport) {
2273 __skb_unlink(skb, list);
2278 if (!pp->thread || !cpu_online(cpu)) {
2279 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2283 skb = dev_alloc_skb(0);
2285 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2288 skb->destructor = fcoe_percpu_flush_done;
2290 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2291 if (pp->fcoe_rx_list.qlen == 1)
2292 wake_up_process(pp->thread);
2293 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2295 wait_for_completion(&fcoe_flush_completion);
2300 * fcoe_reset() - Reset a local port
2301 * @shost: The SCSI host associated with the local port to be reset
2303 * Returns: Always 0 (return value required by FC transport template)
2305 static int fcoe_reset(struct Scsi_Host *shost)
2307 struct fc_lport *lport = shost_priv(shost);
2308 struct fcoe_port *port = lport_priv(lport);
2309 struct fcoe_interface *fcoe = port->priv;
2311 fcoe_ctlr_link_down(&fcoe->ctlr);
2312 fcoe_clean_pending_queue(fcoe->ctlr.lp);
2313 if (!fcoe_link_ok(fcoe->ctlr.lp))
2314 fcoe_ctlr_link_up(&fcoe->ctlr);
2319 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2320 * @netdev: The net device used as a key
2322 * Locking: Must be called with the RNL mutex held.
2324 * Returns: NULL or the FCoE interface
2326 static struct fcoe_interface *
2327 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2329 struct fcoe_interface *fcoe;
2331 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2332 if (fcoe->netdev == netdev)
2339 * fcoe_hostlist_lookup() - Find the local port associated with a
2341 * @netdev: The netdevice used as a key
2343 * Locking: Must be called with the RTNL mutex held
2345 * Returns: NULL or the local port
2347 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2349 struct fcoe_interface *fcoe;
2351 fcoe = fcoe_hostlist_lookup_port(netdev);
2352 return (fcoe) ? fcoe->ctlr.lp : NULL;
2356 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2357 * port to the hostlist
2358 * @lport: The local port that identifies the FCoE interface to be added
2360 * Locking: must be called with the RTNL mutex held
2362 * Returns: 0 for success
2364 static int fcoe_hostlist_add(const struct fc_lport *lport)
2366 struct fcoe_interface *fcoe;
2367 struct fcoe_port *port;
2369 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2371 port = lport_priv(lport);
2373 list_add_tail(&fcoe->list, &fcoe_hostlist);
2379 static struct fcoe_transport fcoe_sw_transport = {
2380 .name = {FCOE_TRANSPORT_DEFAULT},
2382 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2383 .match = fcoe_match,
2384 .create = fcoe_create,
2385 .destroy = fcoe_destroy,
2386 .enable = fcoe_enable,
2387 .disable = fcoe_disable,
2391 * fcoe_init() - Initialize fcoe.ko
2393 * Returns: 0 on success, or a negative value on failure
2395 static int __init fcoe_init(void)
2397 struct fcoe_percpu_s *p;
2401 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2405 /* register as a fcoe transport */
2406 rc = fcoe_transport_attach(&fcoe_sw_transport);
2408 printk(KERN_ERR "failed to register an fcoe transport, check "
2409 "if libfcoe is loaded\n");
2413 mutex_lock(&fcoe_config_mutex);
2415 for_each_possible_cpu(cpu) {
2416 p = &per_cpu(fcoe_percpu, cpu);
2417 skb_queue_head_init(&p->fcoe_rx_list);
2420 for_each_online_cpu(cpu)
2421 fcoe_percpu_thread_create(cpu);
2423 /* Initialize per CPU interrupt thread */
2424 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2428 /* Setup link change notification */
2431 rc = fcoe_if_init();
2435 mutex_unlock(&fcoe_config_mutex);
2439 for_each_online_cpu(cpu) {
2440 fcoe_percpu_thread_destroy(cpu);
2442 mutex_unlock(&fcoe_config_mutex);
2443 destroy_workqueue(fcoe_wq);
2446 module_init(fcoe_init);
2449 * fcoe_exit() - Clean up fcoe.ko
2451 * Returns: 0 on success or a negative value on failure
2453 static void __exit fcoe_exit(void)
2455 struct fcoe_interface *fcoe, *tmp;
2456 struct fcoe_port *port;
2459 mutex_lock(&fcoe_config_mutex);
2463 /* releases the associated fcoe hosts */
2465 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2466 list_del(&fcoe->list);
2467 port = lport_priv(fcoe->ctlr.lp);
2468 queue_work(fcoe_wq, &port->destroy_work);
2472 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2474 for_each_online_cpu(cpu)
2475 fcoe_percpu_thread_destroy(cpu);
2477 mutex_unlock(&fcoe_config_mutex);
2480 * destroy_work's may be chained but destroy_workqueue()
2481 * can take care of them. Just kill the fcoe_wq.
2483 destroy_workqueue(fcoe_wq);
2486 * Detaching from the scsi transport must happen after all
2487 * destroys are done on the fcoe_wq. destroy_workqueue will
2488 * enusre the fcoe_wq is flushed.
2492 /* detach from fcoe transport */
2493 fcoe_transport_detach(&fcoe_sw_transport);
2495 module_exit(fcoe_exit);
2498 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2499 * @seq: active sequence in the FLOGI or FDISC exchange
2500 * @fp: response frame, or error encoded in a pointer (timeout)
2501 * @arg: pointer the the fcoe_ctlr structure
2503 * This handles MAC address management for FCoE, then passes control on to
2504 * the libfc FLOGI response handler.
2506 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2508 struct fcoe_ctlr *fip = arg;
2509 struct fc_exch *exch = fc_seq_exch(seq);
2510 struct fc_lport *lport = exch->lp;
2516 mac = fr_cb(fp)->granted_mac;
2518 if (is_zero_ether_addr(mac))
2519 fcoe_ctlr_recv_flogi(fip, lport, fp);
2520 if (!is_zero_ether_addr(mac))
2521 fcoe_update_src_mac(lport, mac);
2523 fc_lport_flogi_resp(seq, fp, lport);
2527 * fcoe_logo_resp() - FCoE specific LOGO response handler
2528 * @seq: active sequence in the LOGO exchange
2529 * @fp: response frame, or error encoded in a pointer (timeout)
2530 * @arg: pointer the the fcoe_ctlr structure
2532 * This handles MAC address management for FCoE, then passes control on to
2533 * the libfc LOGO response handler.
2535 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2537 struct fc_lport *lport = arg;
2538 static u8 zero_mac[ETH_ALEN] = { 0 };
2541 fcoe_update_src_mac(lport, zero_mac);
2542 fc_lport_logo_resp(seq, fp, lport);
2546 * fcoe_elsct_send - FCoE specific ELS handler
2548 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2549 * using FCoE specific response handlers and passing the FIP controller as
2550 * the argument (the lport is still available from the exchange).
2552 * Most of the work here is just handed off to the libfc routine.
2554 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2555 struct fc_frame *fp, unsigned int op,
2556 void (*resp)(struct fc_seq *,
2559 void *arg, u32 timeout)
2561 struct fcoe_port *port = lport_priv(lport);
2562 struct fcoe_interface *fcoe = port->priv;
2563 struct fcoe_ctlr *fip = &fcoe->ctlr;
2564 struct fc_frame_header *fh = fc_frame_header_get(fp);
2569 if (lport->point_to_multipoint)
2571 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2574 /* only hook onto fabric logouts, not port logouts */
2575 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2577 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2580 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2584 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2585 * @vport: fc_vport object to create a new fc_host for
2586 * @disabled: start the new fc_host in a disabled state by default?
2588 * Returns: 0 for success
2590 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2592 struct Scsi_Host *shost = vport_to_shost(vport);
2593 struct fc_lport *n_port = shost_priv(shost);
2594 struct fcoe_port *port = lport_priv(n_port);
2595 struct fcoe_interface *fcoe = port->priv;
2596 struct net_device *netdev = fcoe->netdev;
2597 struct fc_lport *vn_port;
2601 rc = fcoe_validate_vport_create(vport);
2603 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2604 printk(KERN_ERR "fcoe: Failed to create vport, "
2605 "WWPN (0x%s) already exists\n",
2610 mutex_lock(&fcoe_config_mutex);
2612 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2614 mutex_unlock(&fcoe_config_mutex);
2616 if (IS_ERR(vn_port)) {
2617 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2623 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2625 vn_port->boot_time = jiffies;
2626 fc_fabric_login(vn_port);
2627 fc_vport_setlink(vn_port);
2633 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2634 * @vport: fc_vport object that is being destroyed
2636 * Returns: 0 for success
2638 static int fcoe_vport_destroy(struct fc_vport *vport)
2640 struct Scsi_Host *shost = vport_to_shost(vport);
2641 struct fc_lport *n_port = shost_priv(shost);
2642 struct fc_lport *vn_port = vport->dd_data;
2644 mutex_lock(&n_port->lp_mutex);
2645 list_del(&vn_port->list);
2646 mutex_unlock(&n_port->lp_mutex);
2648 mutex_lock(&fcoe_config_mutex);
2649 fcoe_if_destroy(vn_port);
2650 mutex_unlock(&fcoe_config_mutex);
2656 * fcoe_vport_disable() - change vport state
2657 * @vport: vport to bring online/offline
2658 * @disable: should the vport be disabled?
2660 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2662 struct fc_lport *lport = vport->dd_data;
2665 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2666 fc_fabric_logoff(lport);
2668 lport->boot_time = jiffies;
2669 fc_fabric_login(lport);
2670 fc_vport_setlink(lport);
2677 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2678 * @vport: fc_vport with a new symbolic name string
2680 * After generating a new symbolic name string, a new RSPN_ID request is
2681 * sent to the name server. There is no response handler, so if it fails
2682 * for some reason it will not be retried.
2684 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2686 struct fc_lport *lport = vport->dd_data;
2687 struct fc_frame *fp;
2690 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2691 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2692 fcoe_netdev(lport)->name, vport->symbolic_name);
2694 if (lport->state != LPORT_ST_READY)
2697 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2698 fp = fc_frame_alloc(lport,
2699 sizeof(struct fc_ct_hdr) +
2700 sizeof(struct fc_ns_rspn) + len);
2703 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2704 NULL, NULL, 3 * lport->r_a_tov);
2708 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2709 * @lport: the local port
2710 * @fc_lesb: the link error status block
2712 static void fcoe_get_lesb(struct fc_lport *lport,
2713 struct fc_els_lesb *fc_lesb)
2715 struct net_device *netdev = fcoe_netdev(lport);
2717 __fcoe_get_lesb(lport, fc_lesb, netdev);
2721 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2722 * @lport: the local port
2723 * @port_id: the port ID
2724 * @fp: the received frame, if any, that caused the port_id to be set.
2726 * This routine handles the case where we received a FLOGI and are
2727 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2728 * so it can set the non-mapped mode and gateway address.
2730 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2732 static void fcoe_set_port_id(struct fc_lport *lport,
2733 u32 port_id, struct fc_frame *fp)
2735 struct fcoe_port *port = lport_priv(lport);
2736 struct fcoe_interface *fcoe = port->priv;
2738 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2739 fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp);