2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
20 #include <linux/module.h>
21 #include <linux/spinlock.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/if_ether.h>
26 #include <linux/if_vlan.h>
27 #include <linux/crc32.h>
28 #include <linux/slab.h>
29 #include <linux/cpu.h>
31 #include <linux/sysfs.h>
32 #include <linux/ctype.h>
33 #include <linux/workqueue.h>
34 #include <net/dcbnl.h>
35 #include <net/dcbevent.h>
36 #include <scsi/scsi_tcq.h>
37 #include <scsi/scsicam.h>
38 #include <scsi/scsi_transport.h>
39 #include <scsi/scsi_transport_fc.h>
40 #include <net/rtnetlink.h>
42 #include <scsi/fc/fc_encaps.h>
43 #include <scsi/fc/fc_fip.h>
44 #include <scsi/fc/fc_fcoe.h>
46 #include <scsi/libfc.h>
47 #include <scsi/fc_frame.h>
48 #include <scsi/libfcoe.h>
52 MODULE_AUTHOR("Open-FCoE.org");
53 MODULE_DESCRIPTION("FCoE");
54 MODULE_LICENSE("GPL v2");
56 /* Performance tuning parameters for fcoe */
57 static unsigned int fcoe_ddp_min
= 4096;
58 module_param_named(ddp_min
, fcoe_ddp_min
, uint
, S_IRUGO
| S_IWUSR
);
59 MODULE_PARM_DESC(ddp_min
, "Minimum I/O size in bytes for " \
60 "Direct Data Placement (DDP).");
62 unsigned int fcoe_debug_logging
;
63 module_param_named(debug_logging
, fcoe_debug_logging
, int, S_IRUGO
|S_IWUSR
);
64 MODULE_PARM_DESC(debug_logging
, "a bit mask of logging levels");
66 static DEFINE_MUTEX(fcoe_config_mutex
);
68 static struct workqueue_struct
*fcoe_wq
;
70 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
71 static DECLARE_COMPLETION(fcoe_flush_completion
);
74 /* must only by accessed under the RTNL mutex */
75 static LIST_HEAD(fcoe_hostlist
);
76 static DEFINE_PER_CPU(struct fcoe_percpu_s
, fcoe_percpu
);
78 /* Function Prototypes */
79 static int fcoe_reset(struct Scsi_Host
*);
80 static int fcoe_xmit(struct fc_lport
*, struct fc_frame
*);
81 static int fcoe_rcv(struct sk_buff
*, struct net_device
*,
82 struct packet_type
*, struct net_device
*);
83 static int fcoe_percpu_receive_thread(void *);
84 static void fcoe_percpu_clean(struct fc_lport
*);
85 static int fcoe_link_ok(struct fc_lport
*);
87 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*);
88 static int fcoe_hostlist_add(const struct fc_lport
*);
89 static void fcoe_hostlist_del(const struct fc_lport
*);
91 static int fcoe_device_notification(struct notifier_block
*, ulong
, void *);
92 static void fcoe_dev_setup(void);
93 static void fcoe_dev_cleanup(void);
94 static struct fcoe_interface
95 *fcoe_hostlist_lookup_port(const struct net_device
*);
97 static int fcoe_fip_recv(struct sk_buff
*, struct net_device
*,
98 struct packet_type
*, struct net_device
*);
100 static void fcoe_fip_send(struct fcoe_ctlr
*, struct sk_buff
*);
101 static void fcoe_update_src_mac(struct fc_lport
*, u8
*);
102 static u8
*fcoe_get_src_mac(struct fc_lport
*);
103 static void fcoe_destroy_work(struct work_struct
*);
105 static int fcoe_ddp_setup(struct fc_lport
*, u16
, struct scatterlist
*,
107 static int fcoe_ddp_done(struct fc_lport
*, u16
);
108 static int fcoe_ddp_target(struct fc_lport
*, u16
, struct scatterlist
*,
110 static int fcoe_cpu_callback(struct notifier_block
*, unsigned long, void *);
111 static int fcoe_dcb_app_notification(struct notifier_block
*notifier
,
112 ulong event
, void *ptr
);
114 static bool fcoe_match(struct net_device
*netdev
);
115 static int fcoe_create(struct net_device
*netdev
, enum fip_state fip_mode
);
116 static int fcoe_destroy(struct net_device
*netdev
);
117 static int fcoe_enable(struct net_device
*netdev
);
118 static int fcoe_disable(struct net_device
*netdev
);
120 /* fcoe_syfs control interface handlers */
121 static int fcoe_ctlr_alloc(struct net_device
*netdev
);
122 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device
*cdev
);
125 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*,
126 u32 did
, struct fc_frame
*,
128 void (*resp
)(struct fc_seq
*,
131 void *, u32 timeout
);
132 static void fcoe_recv_frame(struct sk_buff
*skb
);
134 /* notification function for packets from net device */
135 static struct notifier_block fcoe_notifier
= {
136 .notifier_call
= fcoe_device_notification
,
139 /* notification function for CPU hotplug events */
140 static struct notifier_block fcoe_cpu_notifier
= {
141 .notifier_call
= fcoe_cpu_callback
,
144 /* notification function for DCB events */
145 static struct notifier_block dcb_notifier
= {
146 .notifier_call
= fcoe_dcb_app_notification
,
149 static struct scsi_transport_template
*fcoe_nport_scsi_transport
;
150 static struct scsi_transport_template
*fcoe_vport_scsi_transport
;
152 static int fcoe_vport_destroy(struct fc_vport
*);
153 static int fcoe_vport_create(struct fc_vport
*, bool disabled
);
154 static int fcoe_vport_disable(struct fc_vport
*, bool disable
);
155 static void fcoe_set_vport_symbolic_name(struct fc_vport
*);
156 static void fcoe_set_port_id(struct fc_lport
*, u32
, struct fc_frame
*);
157 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device
*);
159 static struct fcoe_sysfs_function_template fcoe_sysfs_templ
= {
160 .set_fcoe_ctlr_mode
= fcoe_ctlr_set_fip_mode
,
161 .set_fcoe_ctlr_enabled
= fcoe_ctlr_enabled
,
162 .get_fcoe_ctlr_link_fail
= fcoe_ctlr_get_lesb
,
163 .get_fcoe_ctlr_vlink_fail
= fcoe_ctlr_get_lesb
,
164 .get_fcoe_ctlr_miss_fka
= fcoe_ctlr_get_lesb
,
165 .get_fcoe_ctlr_symb_err
= fcoe_ctlr_get_lesb
,
166 .get_fcoe_ctlr_err_block
= fcoe_ctlr_get_lesb
,
167 .get_fcoe_ctlr_fcs_error
= fcoe_ctlr_get_lesb
,
169 .get_fcoe_fcf_selected
= fcoe_fcf_get_selected
,
170 .get_fcoe_fcf_vlan_id
= fcoe_fcf_get_vlan_id
,
173 static struct libfc_function_template fcoe_libfc_fcn_templ
= {
174 .frame_send
= fcoe_xmit
,
175 .ddp_setup
= fcoe_ddp_setup
,
176 .ddp_done
= fcoe_ddp_done
,
177 .ddp_target
= fcoe_ddp_target
,
178 .elsct_send
= fcoe_elsct_send
,
179 .get_lesb
= fcoe_get_lesb
,
180 .lport_set_port_id
= fcoe_set_port_id
,
183 static struct fc_function_template fcoe_nport_fc_functions
= {
184 .show_host_node_name
= 1,
185 .show_host_port_name
= 1,
186 .show_host_supported_classes
= 1,
187 .show_host_supported_fc4s
= 1,
188 .show_host_active_fc4s
= 1,
189 .show_host_maxframe_size
= 1,
190 .show_host_serial_number
= 1,
191 .show_host_manufacturer
= 1,
192 .show_host_model
= 1,
193 .show_host_model_description
= 1,
194 .show_host_hardware_version
= 1,
195 .show_host_driver_version
= 1,
196 .show_host_firmware_version
= 1,
197 .show_host_optionrom_version
= 1,
199 .show_host_port_id
= 1,
200 .show_host_supported_speeds
= 1,
201 .get_host_speed
= fc_get_host_speed
,
202 .show_host_speed
= 1,
203 .show_host_port_type
= 1,
204 .get_host_port_state
= fc_get_host_port_state
,
205 .show_host_port_state
= 1,
206 .show_host_symbolic_name
= 1,
208 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
209 .show_rport_maxframe_size
= 1,
210 .show_rport_supported_classes
= 1,
212 .show_host_fabric_name
= 1,
213 .show_starget_node_name
= 1,
214 .show_starget_port_name
= 1,
215 .show_starget_port_id
= 1,
216 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
217 .show_rport_dev_loss_tmo
= 1,
218 .get_fc_host_stats
= fc_get_host_stats
,
219 .issue_fc_host_lip
= fcoe_reset
,
221 .terminate_rport_io
= fc_rport_terminate_io
,
223 .vport_create
= fcoe_vport_create
,
224 .vport_delete
= fcoe_vport_destroy
,
225 .vport_disable
= fcoe_vport_disable
,
226 .set_vport_symbolic_name
= fcoe_set_vport_symbolic_name
,
228 .bsg_request
= fc_lport_bsg_request
,
231 static struct fc_function_template fcoe_vport_fc_functions
= {
232 .show_host_node_name
= 1,
233 .show_host_port_name
= 1,
234 .show_host_supported_classes
= 1,
235 .show_host_supported_fc4s
= 1,
236 .show_host_active_fc4s
= 1,
237 .show_host_maxframe_size
= 1,
238 .show_host_serial_number
= 1,
239 .show_host_manufacturer
= 1,
240 .show_host_model
= 1,
241 .show_host_model_description
= 1,
242 .show_host_hardware_version
= 1,
243 .show_host_driver_version
= 1,
244 .show_host_firmware_version
= 1,
245 .show_host_optionrom_version
= 1,
247 .show_host_port_id
= 1,
248 .show_host_supported_speeds
= 1,
249 .get_host_speed
= fc_get_host_speed
,
250 .show_host_speed
= 1,
251 .show_host_port_type
= 1,
252 .get_host_port_state
= fc_get_host_port_state
,
253 .show_host_port_state
= 1,
254 .show_host_symbolic_name
= 1,
256 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
257 .show_rport_maxframe_size
= 1,
258 .show_rport_supported_classes
= 1,
260 .show_host_fabric_name
= 1,
261 .show_starget_node_name
= 1,
262 .show_starget_port_name
= 1,
263 .show_starget_port_id
= 1,
264 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
265 .show_rport_dev_loss_tmo
= 1,
266 .get_fc_host_stats
= fc_get_host_stats
,
267 .issue_fc_host_lip
= fcoe_reset
,
269 .terminate_rport_io
= fc_rport_terminate_io
,
271 .bsg_request
= fc_lport_bsg_request
,
274 static struct scsi_host_template fcoe_shost_template
= {
275 .module
= THIS_MODULE
,
276 .name
= "FCoE Driver",
277 .proc_name
= FCOE_NAME
,
278 .queuecommand
= fc_queuecommand
,
279 .eh_abort_handler
= fc_eh_abort
,
280 .eh_device_reset_handler
= fc_eh_device_reset
,
281 .eh_host_reset_handler
= fc_eh_host_reset
,
282 .slave_alloc
= fc_slave_alloc
,
283 .change_queue_depth
= fc_change_queue_depth
,
284 .change_queue_type
= fc_change_queue_type
,
287 .can_queue
= FCOE_MAX_OUTSTANDING_COMMANDS
,
288 .use_clustering
= ENABLE_CLUSTERING
,
289 .sg_tablesize
= SG_ALL
,
290 .max_sectors
= 0xffff,
294 * fcoe_interface_setup() - Setup a FCoE interface
295 * @fcoe: The new FCoE interface
296 * @netdev: The net device that the fcoe interface is on
298 * Returns : 0 for success
299 * Locking: must be called with the RTNL mutex held
301 static int fcoe_interface_setup(struct fcoe_interface
*fcoe
,
302 struct net_device
*netdev
)
304 struct fcoe_ctlr
*fip
= fcoe_to_ctlr(fcoe
);
305 struct netdev_hw_addr
*ha
;
306 struct net_device
*real_dev
;
307 u8 flogi_maddr
[ETH_ALEN
];
308 const struct net_device_ops
*ops
;
310 fcoe
->netdev
= netdev
;
312 /* Let LLD initialize for FCoE */
313 ops
= netdev
->netdev_ops
;
314 if (ops
->ndo_fcoe_enable
) {
315 if (ops
->ndo_fcoe_enable(netdev
))
316 FCOE_NETDEV_DBG(netdev
, "Failed to enable FCoE"
317 " specific feature for LLD.\n");
320 /* Do not support for bonding device */
321 if (netdev
->priv_flags
& IFF_BONDING
&& netdev
->flags
& IFF_MASTER
) {
322 FCOE_NETDEV_DBG(netdev
, "Bonded interfaces not supported\n");
326 /* look for SAN MAC address, if multiple SAN MACs exist, only
327 * use the first one for SPMA */
328 real_dev
= (netdev
->priv_flags
& IFF_802_1Q_VLAN
) ?
329 vlan_dev_real_dev(netdev
) : netdev
;
330 fcoe
->realdev
= real_dev
;
332 for_each_dev_addr(real_dev
, ha
) {
333 if ((ha
->type
== NETDEV_HW_ADDR_T_SAN
) &&
334 (is_valid_ether_addr(ha
->addr
))) {
335 memcpy(fip
->ctl_src_addr
, ha
->addr
, ETH_ALEN
);
342 /* setup Source Mac Address */
344 memcpy(fip
->ctl_src_addr
, netdev
->dev_addr
, netdev
->addr_len
);
347 * Add FCoE MAC address as second unicast MAC address
348 * or enter promiscuous mode if not capable of listening
349 * for multiple unicast MACs.
351 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
352 dev_uc_add(netdev
, flogi_maddr
);
354 dev_uc_add(netdev
, fip
->ctl_src_addr
);
355 if (fip
->mode
== FIP_MODE_VN2VN
) {
356 dev_mc_add(netdev
, FIP_ALL_VN2VN_MACS
);
357 dev_mc_add(netdev
, FIP_ALL_P2P_MACS
);
359 dev_mc_add(netdev
, FIP_ALL_ENODE_MACS
);
362 * setup the receive function from ethernet driver
363 * on the ethertype for the given device
365 fcoe
->fcoe_packet_type
.func
= fcoe_rcv
;
366 fcoe
->fcoe_packet_type
.type
= __constant_htons(ETH_P_FCOE
);
367 fcoe
->fcoe_packet_type
.dev
= netdev
;
368 dev_add_pack(&fcoe
->fcoe_packet_type
);
370 fcoe
->fip_packet_type
.func
= fcoe_fip_recv
;
371 fcoe
->fip_packet_type
.type
= htons(ETH_P_FIP
);
372 fcoe
->fip_packet_type
.dev
= netdev
;
373 dev_add_pack(&fcoe
->fip_packet_type
);
379 * fcoe_interface_create() - Create a FCoE interface on a net device
380 * @netdev: The net device to create the FCoE interface on
381 * @fip_mode: The mode to use for FIP
383 * Returns: pointer to a struct fcoe_interface or NULL on error
385 static struct fcoe_interface
*fcoe_interface_create(struct net_device
*netdev
,
386 enum fip_state fip_mode
)
388 struct fcoe_ctlr_device
*ctlr_dev
;
389 struct fcoe_ctlr
*ctlr
;
390 struct fcoe_interface
*fcoe
;
394 if (!try_module_get(THIS_MODULE
)) {
395 FCOE_NETDEV_DBG(netdev
,
396 "Could not get a reference to the module\n");
397 fcoe
= ERR_PTR(-EBUSY
);
401 size
= sizeof(struct fcoe_ctlr
) + sizeof(struct fcoe_interface
);
402 ctlr_dev
= fcoe_ctlr_device_add(&netdev
->dev
, &fcoe_sysfs_templ
,
405 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
406 fcoe
= ERR_PTR(-ENOMEM
);
410 ctlr
= fcoe_ctlr_device_priv(ctlr_dev
);
411 ctlr
->cdev
= ctlr_dev
;
412 fcoe
= fcoe_ctlr_priv(ctlr
);
419 fcoe_ctlr_init(ctlr
, fip_mode
);
420 ctlr
->send
= fcoe_fip_send
;
421 ctlr
->update_mac
= fcoe_update_src_mac
;
422 ctlr
->get_src_addr
= fcoe_get_src_mac
;
424 err
= fcoe_interface_setup(fcoe
, netdev
);
426 fcoe_ctlr_destroy(ctlr
);
427 fcoe_ctlr_device_delete(ctlr_dev
);
436 module_put(THIS_MODULE
);
442 * fcoe_interface_remove() - remove FCoE interface from netdev
443 * @fcoe: The FCoE interface to be cleaned up
445 * Caller must be holding the RTNL mutex
447 static void fcoe_interface_remove(struct fcoe_interface
*fcoe
)
449 struct net_device
*netdev
= fcoe
->netdev
;
450 struct fcoe_ctlr
*fip
= fcoe_to_ctlr(fcoe
);
451 u8 flogi_maddr
[ETH_ALEN
];
452 const struct net_device_ops
*ops
;
455 * Don't listen for Ethernet packets anymore.
456 * synchronize_net() ensures that the packet handlers are not running
457 * on another CPU. dev_remove_pack() would do that, this calls the
458 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
460 __dev_remove_pack(&fcoe
->fcoe_packet_type
);
461 __dev_remove_pack(&fcoe
->fip_packet_type
);
464 /* Delete secondary MAC addresses */
465 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
466 dev_uc_del(netdev
, flogi_maddr
);
468 dev_uc_del(netdev
, fip
->ctl_src_addr
);
469 if (fip
->mode
== FIP_MODE_VN2VN
) {
470 dev_mc_del(netdev
, FIP_ALL_VN2VN_MACS
);
471 dev_mc_del(netdev
, FIP_ALL_P2P_MACS
);
473 dev_mc_del(netdev
, FIP_ALL_ENODE_MACS
);
475 /* Tell the LLD we are done w/ FCoE */
476 ops
= netdev
->netdev_ops
;
477 if (ops
->ndo_fcoe_disable
) {
478 if (ops
->ndo_fcoe_disable(netdev
))
479 FCOE_NETDEV_DBG(netdev
, "Failed to disable FCoE"
480 " specific feature for LLD.\n");
487 * fcoe_interface_cleanup() - Clean up a FCoE interface
488 * @fcoe: The FCoE interface to be cleaned up
490 static void fcoe_interface_cleanup(struct fcoe_interface
*fcoe
)
492 struct net_device
*netdev
= fcoe
->netdev
;
493 struct fcoe_ctlr
*fip
= fcoe_to_ctlr(fcoe
);
497 fcoe_interface_remove(fcoe
);
500 /* Release the self-reference taken during fcoe_interface_create() */
501 /* tear-down the FCoE controller */
502 fcoe_ctlr_destroy(fip
);
503 scsi_host_put(fip
->lp
->host
);
505 module_put(THIS_MODULE
);
509 * fcoe_fip_recv() - Handler for received FIP frames
510 * @skb: The receive skb
511 * @netdev: The associated net device
512 * @ptype: The packet_type structure which was used to register this handler
513 * @orig_dev: The original net_device the the skb was received on.
514 * (in case dev is a bond)
516 * Returns: 0 for success
518 static int fcoe_fip_recv(struct sk_buff
*skb
, struct net_device
*netdev
,
519 struct packet_type
*ptype
,
520 struct net_device
*orig_dev
)
522 struct fcoe_interface
*fcoe
;
523 struct fcoe_ctlr
*ctlr
;
525 fcoe
= container_of(ptype
, struct fcoe_interface
, fip_packet_type
);
526 ctlr
= fcoe_to_ctlr(fcoe
);
527 fcoe_ctlr_recv(ctlr
, skb
);
532 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
533 * @port: The FCoE port
534 * @skb: The FIP/FCoE packet to be sent
536 static void fcoe_port_send(struct fcoe_port
*port
, struct sk_buff
*skb
)
538 if (port
->fcoe_pending_queue
.qlen
)
539 fcoe_check_wait_queue(port
->lport
, skb
);
540 else if (fcoe_start_io(skb
))
541 fcoe_check_wait_queue(port
->lport
, skb
);
545 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
546 * @fip: The FCoE controller
547 * @skb: The FIP packet to be sent
549 static void fcoe_fip_send(struct fcoe_ctlr
*fip
, struct sk_buff
*skb
)
551 skb
->dev
= fcoe_from_ctlr(fip
)->netdev
;
552 fcoe_port_send(lport_priv(fip
->lp
), skb
);
556 * fcoe_update_src_mac() - Update the Ethernet MAC filters
557 * @lport: The local port to update the source MAC on
558 * @addr: Unicast MAC address to add
560 * Remove any previously-set unicast MAC filter.
561 * Add secondary FCoE MAC address filter for our OUI.
563 static void fcoe_update_src_mac(struct fc_lport
*lport
, u8
*addr
)
565 struct fcoe_port
*port
= lport_priv(lport
);
566 struct fcoe_interface
*fcoe
= port
->priv
;
568 if (!is_zero_ether_addr(port
->data_src_addr
))
569 dev_uc_del(fcoe
->netdev
, port
->data_src_addr
);
570 if (!is_zero_ether_addr(addr
))
571 dev_uc_add(fcoe
->netdev
, addr
);
572 memcpy(port
->data_src_addr
, addr
, ETH_ALEN
);
576 * fcoe_get_src_mac() - return the Ethernet source address for an lport
577 * @lport: libfc lport
579 static u8
*fcoe_get_src_mac(struct fc_lport
*lport
)
581 struct fcoe_port
*port
= lport_priv(lport
);
583 return port
->data_src_addr
;
587 * fcoe_lport_config() - Set up a local port
588 * @lport: The local port to be setup
590 * Returns: 0 for success
592 static int fcoe_lport_config(struct fc_lport
*lport
)
596 lport
->max_retry_count
= 3;
597 lport
->max_rport_retry_count
= 3;
598 lport
->e_d_tov
= 2 * 1000; /* FC-FS default */
599 lport
->r_a_tov
= 2 * 2 * 1000;
600 lport
->service_params
= (FCP_SPPF_INIT_FCN
| FCP_SPPF_RD_XRDY_DIS
|
601 FCP_SPPF_RETRY
| FCP_SPPF_CONF_COMPL
);
602 lport
->does_npiv
= 1;
604 fc_lport_init_stats(lport
);
606 /* lport fc_lport related configuration */
607 fc_lport_config(lport
);
609 /* offload related configuration */
610 lport
->crc_offload
= 0;
611 lport
->seq_offload
= 0;
612 lport
->lro_enabled
= 0;
620 * fcoe_netdev_features_change - Updates the lport's offload flags based
621 * on the LLD netdev's FCoE feature flags
623 static void fcoe_netdev_features_change(struct fc_lport
*lport
,
624 struct net_device
*netdev
)
626 mutex_lock(&lport
->lp_mutex
);
628 if (netdev
->features
& NETIF_F_SG
)
633 if (netdev
->features
& NETIF_F_FCOE_CRC
) {
634 lport
->crc_offload
= 1;
635 FCOE_NETDEV_DBG(netdev
, "Supports FCCRC offload\n");
637 lport
->crc_offload
= 0;
640 if (netdev
->features
& NETIF_F_FSO
) {
641 lport
->seq_offload
= 1;
642 lport
->lso_max
= netdev
->gso_max_size
;
643 FCOE_NETDEV_DBG(netdev
, "Supports LSO for max len 0x%x\n",
646 lport
->seq_offload
= 0;
650 if (netdev
->fcoe_ddp_xid
) {
651 lport
->lro_enabled
= 1;
652 lport
->lro_xid
= netdev
->fcoe_ddp_xid
;
653 FCOE_NETDEV_DBG(netdev
, "Supports LRO for max xid 0x%x\n",
656 lport
->lro_enabled
= 0;
660 mutex_unlock(&lport
->lp_mutex
);
664 * fcoe_netdev_config() - Set up net devive for SW FCoE
665 * @lport: The local port that is associated with the net device
666 * @netdev: The associated net device
668 * Must be called after fcoe_lport_config() as it will use local port mutex
670 * Returns: 0 for success
672 static int fcoe_netdev_config(struct fc_lport
*lport
, struct net_device
*netdev
)
676 struct fcoe_interface
*fcoe
;
677 struct fcoe_ctlr
*ctlr
;
678 struct fcoe_port
*port
;
680 /* Setup lport private data to point to fcoe softc */
681 port
= lport_priv(lport
);
683 ctlr
= fcoe_to_ctlr(fcoe
);
686 * Determine max frame size based on underlying device and optional
687 * user-configured limit. If the MFS is too low, fcoe_link_ok()
688 * will return 0, so do this first.
691 if (netdev
->features
& NETIF_F_FCOE_MTU
) {
693 FCOE_NETDEV_DBG(netdev
, "Supports FCOE_MTU of %d bytes\n", mfs
);
695 mfs
-= (sizeof(struct fcoe_hdr
) + sizeof(struct fcoe_crc_eof
));
696 if (fc_set_mfs(lport
, mfs
))
699 /* offload features support */
700 fcoe_netdev_features_change(lport
, netdev
);
702 skb_queue_head_init(&port
->fcoe_pending_queue
);
703 port
->fcoe_pending_queue_active
= 0;
704 setup_timer(&port
->timer
, fcoe_queue_timer
, (unsigned long)lport
);
706 fcoe_link_speed_update(lport
);
709 if (fcoe_get_wwn(netdev
, &wwnn
, NETDEV_FCOE_WWNN
))
710 wwnn
= fcoe_wwn_from_mac(ctlr
->ctl_src_addr
, 1, 0);
711 fc_set_wwnn(lport
, wwnn
);
712 if (fcoe_get_wwn(netdev
, &wwpn
, NETDEV_FCOE_WWPN
))
713 wwpn
= fcoe_wwn_from_mac(ctlr
->ctl_src_addr
,
715 fc_set_wwpn(lport
, wwpn
);
722 * fcoe_shost_config() - Set up the SCSI host associated with a local port
723 * @lport: The local port
724 * @dev: The device associated with the SCSI host
726 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
728 * Returns: 0 for success
730 static int fcoe_shost_config(struct fc_lport
*lport
, struct device
*dev
)
734 /* lport scsi host config */
735 lport
->host
->max_lun
= FCOE_MAX_LUN
;
736 lport
->host
->max_id
= FCOE_MAX_FCP_TARGET
;
737 lport
->host
->max_channel
= 0;
738 lport
->host
->max_cmd_len
= FCOE_MAX_CMD_LEN
;
741 lport
->host
->transportt
= fcoe_vport_scsi_transport
;
743 lport
->host
->transportt
= fcoe_nport_scsi_transport
;
745 /* add the new host to the SCSI-ml */
746 rc
= scsi_add_host(lport
->host
, dev
);
748 FCOE_NETDEV_DBG(fcoe_netdev(lport
), "fcoe_shost_config: "
749 "error on scsi_add_host\n");
754 fc_host_max_npiv_vports(lport
->host
) = USHRT_MAX
;
756 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
757 "%s v%s over %s", FCOE_NAME
, FCOE_VERSION
,
758 fcoe_netdev(lport
)->name
);
765 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
766 * @lport: The local port that is associated with the net device
767 * @netdev: The associated net device
769 * Must be called after fcoe_shost_config() as it will use local port mutex
772 static void fcoe_fdmi_info(struct fc_lport
*lport
, struct net_device
*netdev
)
774 struct fcoe_interface
*fcoe
;
775 struct fcoe_port
*port
;
776 struct net_device
*realdev
;
779 port
= lport_priv(lport
);
781 realdev
= fcoe
->realdev
;
786 /* No FDMI state m/c for NPIV ports */
790 if (realdev
->netdev_ops
->ndo_fcoe_get_hbainfo
) {
791 struct netdev_fcoe_hbainfo
*fdmi
;
792 fdmi
= kzalloc(sizeof(*fdmi
), GFP_KERNEL
);
796 rc
= realdev
->netdev_ops
->ndo_fcoe_get_hbainfo(realdev
,
799 printk(KERN_INFO
"fcoe: Failed to retrieve FDMI "
800 "information from netdev.\n");
804 snprintf(fc_host_serial_number(lport
->host
),
805 FC_SERIAL_NUMBER_SIZE
,
807 fdmi
->serial_number
);
808 snprintf(fc_host_manufacturer(lport
->host
),
809 FC_SERIAL_NUMBER_SIZE
,
812 snprintf(fc_host_model(lport
->host
),
813 FC_SYMBOLIC_NAME_SIZE
,
816 snprintf(fc_host_model_description(lport
->host
),
817 FC_SYMBOLIC_NAME_SIZE
,
819 fdmi
->model_description
);
820 snprintf(fc_host_hardware_version(lport
->host
),
821 FC_VERSION_STRING_SIZE
,
823 fdmi
->hardware_version
);
824 snprintf(fc_host_driver_version(lport
->host
),
825 FC_VERSION_STRING_SIZE
,
827 fdmi
->driver_version
);
828 snprintf(fc_host_optionrom_version(lport
->host
),
829 FC_VERSION_STRING_SIZE
,
831 fdmi
->optionrom_version
);
832 snprintf(fc_host_firmware_version(lport
->host
),
833 FC_VERSION_STRING_SIZE
,
835 fdmi
->firmware_version
);
837 /* Enable FDMI lport states */
838 lport
->fdmi_enabled
= 1;
841 lport
->fdmi_enabled
= 0;
842 printk(KERN_INFO
"fcoe: No FDMI support.\n");
847 * fcoe_oem_match() - The match routine for the offloaded exchange manager
850 * This routine will be associated with an exchange manager (EM). When
851 * the libfc exchange handling code is looking for an EM to use it will
852 * call this routine and pass it the frame that it wishes to send. This
853 * routine will return True if the associated EM is to be used and False
854 * if the echange code should continue looking for an EM.
856 * The offload EM that this routine is associated with will handle any
857 * packets that are for SCSI read requests.
859 * This has been enhanced to work when FCoE stack is operating in target
862 * Returns: True for read types I/O, otherwise returns false.
864 static bool fcoe_oem_match(struct fc_frame
*fp
)
866 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
867 struct fcp_cmnd
*fcp
;
869 if (fc_fcp_is_read(fr_fsp(fp
)) &&
870 (fr_fsp(fp
)->data_len
> fcoe_ddp_min
))
872 else if ((fr_fsp(fp
) == NULL
) &&
873 (fh
->fh_r_ctl
== FC_RCTL_DD_UNSOL_CMD
) &&
874 (ntohs(fh
->fh_rx_id
) == FC_XID_UNKNOWN
)) {
875 fcp
= fc_frame_payload_get(fp
, sizeof(*fcp
));
876 if ((fcp
->fc_flags
& FCP_CFL_WRDATA
) &&
877 (ntohl(fcp
->fc_dl
) > fcoe_ddp_min
))
884 * fcoe_em_config() - Allocate and configure an exchange manager
885 * @lport: The local port that the new EM will be associated with
887 * Returns: 0 on success
889 static inline int fcoe_em_config(struct fc_lport
*lport
)
891 struct fcoe_port
*port
= lport_priv(lport
);
892 struct fcoe_interface
*fcoe
= port
->priv
;
893 struct fcoe_interface
*oldfcoe
= NULL
;
894 struct net_device
*old_real_dev
, *cur_real_dev
;
895 u16 min_xid
= FCOE_MIN_XID
;
896 u16 max_xid
= FCOE_MAX_XID
;
899 * Check if need to allocate an em instance for
900 * offload exchange ids to be shared across all VN_PORTs/lport.
902 if (!lport
->lro_enabled
|| !lport
->lro_xid
||
903 (lport
->lro_xid
>= max_xid
)) {
909 * Reuse existing offload em instance in case
910 * it is already allocated on real eth device
912 if (fcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
913 cur_real_dev
= vlan_dev_real_dev(fcoe
->netdev
);
915 cur_real_dev
= fcoe
->netdev
;
917 list_for_each_entry(oldfcoe
, &fcoe_hostlist
, list
) {
918 if (oldfcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
919 old_real_dev
= vlan_dev_real_dev(oldfcoe
->netdev
);
921 old_real_dev
= oldfcoe
->netdev
;
923 if (cur_real_dev
== old_real_dev
) {
924 fcoe
->oem
= oldfcoe
->oem
;
930 if (!fc_exch_mgr_add(lport
, fcoe
->oem
, fcoe_oem_match
)) {
931 printk(KERN_ERR
"fcoe_em_config: failed to add "
932 "offload em:%p on interface:%s\n",
933 fcoe
->oem
, fcoe
->netdev
->name
);
937 fcoe
->oem
= fc_exch_mgr_alloc(lport
, FC_CLASS_3
,
938 FCOE_MIN_XID
, lport
->lro_xid
,
941 printk(KERN_ERR
"fcoe_em_config: failed to allocate "
942 "em for offload exches on interface:%s\n",
949 * Exclude offload EM xid range from next EM xid range.
951 min_xid
+= lport
->lro_xid
+ 1;
954 if (!fc_exch_mgr_alloc(lport
, FC_CLASS_3
, min_xid
, max_xid
, NULL
)) {
955 printk(KERN_ERR
"fcoe_em_config: failed to "
956 "allocate em on interface %s\n", fcoe
->netdev
->name
);
964 * fcoe_if_destroy() - Tear down a SW FCoE instance
965 * @lport: The local port to be destroyed
968 static void fcoe_if_destroy(struct fc_lport
*lport
)
970 struct fcoe_port
*port
= lport_priv(lport
);
971 struct fcoe_interface
*fcoe
= port
->priv
;
972 struct net_device
*netdev
= fcoe
->netdev
;
974 FCOE_NETDEV_DBG(netdev
, "Destroying interface\n");
976 /* Logout of the fabric */
977 fc_fabric_logoff(lport
);
979 /* Cleanup the fc_lport */
980 fc_lport_destroy(lport
);
982 /* Stop the transmit retry timer */
983 del_timer_sync(&port
->timer
);
985 /* Free existing transmit skbs */
986 fcoe_clean_pending_queue(lport
);
989 if (!is_zero_ether_addr(port
->data_src_addr
))
990 dev_uc_del(netdev
, port
->data_src_addr
);
994 fcoe_interface_remove(fcoe
);
997 /* Free queued packets for the per-CPU receive threads */
998 fcoe_percpu_clean(lport
);
1000 /* Detach from the scsi-ml */
1001 fc_remove_host(lport
->host
);
1002 scsi_remove_host(lport
->host
);
1004 /* Destroy lport scsi_priv */
1005 fc_fcp_destroy(lport
);
1007 /* There are no more rports or I/O, free the EM */
1008 fc_exch_mgr_free(lport
);
1010 /* Free memory used by statistical counters */
1011 fc_lport_free_stats(lport
);
1014 * Release the Scsi_Host for vport but hold on to
1015 * master lport until it fcoe interface fully cleaned-up.
1018 scsi_host_put(lport
->host
);
1022 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1023 * @lport: The local port to setup DDP for
1024 * @xid: The exchange ID for this DDP transfer
1025 * @sgl: The scatterlist describing this transfer
1026 * @sgc: The number of sg items
1028 * Returns: 0 if the DDP context was not configured
1030 static int fcoe_ddp_setup(struct fc_lport
*lport
, u16 xid
,
1031 struct scatterlist
*sgl
, unsigned int sgc
)
1033 struct net_device
*netdev
= fcoe_netdev(lport
);
1035 if (netdev
->netdev_ops
->ndo_fcoe_ddp_setup
)
1036 return netdev
->netdev_ops
->ndo_fcoe_ddp_setup(netdev
,
1044 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1045 * @lport: The local port to setup DDP for
1046 * @xid: The exchange ID for this DDP transfer
1047 * @sgl: The scatterlist describing this transfer
1048 * @sgc: The number of sg items
1050 * Returns: 0 if the DDP context was not configured
1052 static int fcoe_ddp_target(struct fc_lport
*lport
, u16 xid
,
1053 struct scatterlist
*sgl
, unsigned int sgc
)
1055 struct net_device
*netdev
= fcoe_netdev(lport
);
1057 if (netdev
->netdev_ops
->ndo_fcoe_ddp_target
)
1058 return netdev
->netdev_ops
->ndo_fcoe_ddp_target(netdev
, xid
,
1066 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1067 * @lport: The local port to complete DDP on
1068 * @xid: The exchange ID for this DDP transfer
1070 * Returns: the length of data that have been completed by DDP
1072 static int fcoe_ddp_done(struct fc_lport
*lport
, u16 xid
)
1074 struct net_device
*netdev
= fcoe_netdev(lport
);
1076 if (netdev
->netdev_ops
->ndo_fcoe_ddp_done
)
1077 return netdev
->netdev_ops
->ndo_fcoe_ddp_done(netdev
, xid
);
1082 * fcoe_if_create() - Create a FCoE instance on an interface
1083 * @fcoe: The FCoE interface to create a local port on
1084 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1085 * @npiv: Indicates if the port is a vport or not
1087 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1089 * Returns: The allocated fc_lport or an error pointer
1091 static struct fc_lport
*fcoe_if_create(struct fcoe_interface
*fcoe
,
1092 struct device
*parent
, int npiv
)
1094 struct fcoe_ctlr
*ctlr
= fcoe_to_ctlr(fcoe
);
1095 struct net_device
*netdev
= fcoe
->netdev
;
1096 struct fc_lport
*lport
, *n_port
;
1097 struct fcoe_port
*port
;
1098 struct Scsi_Host
*shost
;
1101 * parent is only a vport if npiv is 1,
1102 * but we'll only use vport in that case so go ahead and set it
1104 struct fc_vport
*vport
= dev_to_vport(parent
);
1106 FCOE_NETDEV_DBG(netdev
, "Create Interface\n");
1109 lport
= libfc_host_alloc(&fcoe_shost_template
, sizeof(*port
));
1111 lport
= libfc_vport_create(vport
, sizeof(*port
));
1114 FCOE_NETDEV_DBG(netdev
, "Could not allocate host structure\n");
1118 port
= lport_priv(lport
);
1119 port
->lport
= lport
;
1121 port
->get_netdev
= fcoe_netdev
;
1122 port
->max_queue_depth
= FCOE_MAX_QUEUE_DEPTH
;
1123 port
->min_queue_depth
= FCOE_MIN_QUEUE_DEPTH
;
1124 INIT_WORK(&port
->destroy_work
, fcoe_destroy_work
);
1127 * Need to add the lport to the hostlist
1128 * so we catch NETDEV_CHANGE events.
1130 fcoe_hostlist_add(lport
);
1132 /* configure a fc_lport including the exchange manager */
1133 rc
= fcoe_lport_config(lport
);
1135 FCOE_NETDEV_DBG(netdev
, "Could not configure lport for the "
1141 FCOE_NETDEV_DBG(netdev
, "Setting vport names, "
1142 "%16.16llx %16.16llx\n",
1143 vport
->node_name
, vport
->port_name
);
1144 fc_set_wwnn(lport
, vport
->node_name
);
1145 fc_set_wwpn(lport
, vport
->port_name
);
1148 /* configure lport network properties */
1149 rc
= fcoe_netdev_config(lport
, netdev
);
1151 FCOE_NETDEV_DBG(netdev
, "Could not configure netdev for the "
1153 goto out_lp_destroy
;
1156 /* configure lport scsi host properties */
1157 rc
= fcoe_shost_config(lport
, parent
);
1159 FCOE_NETDEV_DBG(netdev
, "Could not configure shost for the "
1161 goto out_lp_destroy
;
1164 /* Initialize the library */
1165 rc
= fcoe_libfc_config(lport
, ctlr
, &fcoe_libfc_fcn_templ
, 1);
1167 FCOE_NETDEV_DBG(netdev
, "Could not configure libfc for the "
1169 goto out_lp_destroy
;
1172 /* Initialized FDMI information */
1173 fcoe_fdmi_info(lport
, netdev
);
1176 * fcoe_em_alloc() and fcoe_hostlist_add() both
1177 * need to be atomic with respect to other changes to the
1178 * hostlist since fcoe_em_alloc() looks for an existing EM
1179 * instance on host list updated by fcoe_hostlist_add().
1181 * This is currently handled through the fcoe_config_mutex
1185 /* lport exch manager allocation */
1186 rc
= fcoe_em_config(lport
);
1188 shost
= vport_to_shost(vport
);
1189 n_port
= shost_priv(shost
);
1190 rc
= fc_exch_mgr_list_clone(n_port
, lport
);
1194 FCOE_NETDEV_DBG(netdev
, "Could not configure the EM\n");
1195 goto out_lp_destroy
;
1201 fc_exch_mgr_free(lport
);
1203 fcoe_hostlist_del(lport
);
1204 scsi_host_put(lport
->host
);
1210 * fcoe_if_init() - Initialization routine for fcoe.ko
1212 * Attaches the SW FCoE transport to the FC transport
1214 * Returns: 0 on success
1216 static int __init
fcoe_if_init(void)
1218 /* attach to scsi transport */
1219 fcoe_nport_scsi_transport
=
1220 fc_attach_transport(&fcoe_nport_fc_functions
);
1221 fcoe_vport_scsi_transport
=
1222 fc_attach_transport(&fcoe_vport_fc_functions
);
1224 if (!fcoe_nport_scsi_transport
) {
1225 printk(KERN_ERR
"fcoe: Failed to attach to the FC transport\n");
1233 * fcoe_if_exit() - Tear down fcoe.ko
1235 * Detaches the SW FCoE transport from the FC transport
1237 * Returns: 0 on success
1239 static int __exit
fcoe_if_exit(void)
1241 fc_release_transport(fcoe_nport_scsi_transport
);
1242 fc_release_transport(fcoe_vport_scsi_transport
);
1243 fcoe_nport_scsi_transport
= NULL
;
1244 fcoe_vport_scsi_transport
= NULL
;
1249 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1250 * @cpu: The CPU index of the CPU to create a receive thread for
1252 static void fcoe_percpu_thread_create(unsigned int cpu
)
1254 struct fcoe_percpu_s
*p
;
1255 struct task_struct
*thread
;
1257 p
= &per_cpu(fcoe_percpu
, cpu
);
1259 thread
= kthread_create_on_node(fcoe_percpu_receive_thread
,
1260 (void *)p
, cpu_to_node(cpu
),
1261 "fcoethread/%d", cpu
);
1263 if (likely(!IS_ERR(thread
))) {
1264 kthread_bind(thread
, cpu
);
1265 wake_up_process(thread
);
1267 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1269 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1274 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1275 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1277 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1278 * current CPU's Rx thread. If the thread being destroyed is bound to
1279 * the CPU processing this context the skbs will be freed.
1281 static void fcoe_percpu_thread_destroy(unsigned int cpu
)
1283 struct fcoe_percpu_s
*p
;
1284 struct task_struct
*thread
;
1285 struct page
*crc_eof
;
1286 struct sk_buff
*skb
;
1288 struct fcoe_percpu_s
*p0
;
1289 unsigned targ_cpu
= get_cpu();
1290 #endif /* CONFIG_SMP */
1292 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu
);
1294 /* Prevent any new skbs from being queued for this CPU. */
1295 p
= &per_cpu(fcoe_percpu
, cpu
);
1296 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1299 crc_eof
= p
->crc_eof_page
;
1300 p
->crc_eof_page
= NULL
;
1301 p
->crc_eof_offset
= 0;
1302 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1306 * Don't bother moving the skb's if this context is running
1307 * on the same CPU that is having its thread destroyed. This
1308 * can easily happen when the module is removed.
1310 if (cpu
!= targ_cpu
) {
1311 p0
= &per_cpu(fcoe_percpu
, targ_cpu
);
1312 spin_lock_bh(&p0
->fcoe_rx_list
.lock
);
1314 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1317 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1318 __skb_queue_tail(&p0
->fcoe_rx_list
, skb
);
1319 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1322 * The targeted CPU is not initialized and cannot accept
1323 * new skbs. Unlock the targeted CPU and drop the skbs
1324 * on the CPU that is going offline.
1326 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1328 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1332 * This scenario occurs when the module is being removed
1333 * and all threads are being destroyed. skbs will continue
1334 * to be shifted from the CPU thread that is being removed
1335 * to the CPU thread associated with the CPU that is processing
1336 * the module removal. Once there is only one CPU Rx thread it
1337 * will reach this case and we will drop all skbs and later
1340 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1341 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1343 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1348 * This a non-SMP scenario where the singular Rx thread is
1349 * being removed. Free all skbs and stop the thread.
1351 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1352 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1354 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1358 kthread_stop(thread
);
1365 * fcoe_cpu_callback() - Handler for CPU hotplug events
1366 * @nfb: The callback data block
1367 * @action: The event triggering the callback
1368 * @hcpu: The index of the CPU that the event is for
1370 * This creates or destroys per-CPU data for fcoe
1372 * Returns NOTIFY_OK always.
1374 static int fcoe_cpu_callback(struct notifier_block
*nfb
,
1375 unsigned long action
, void *hcpu
)
1377 unsigned cpu
= (unsigned long)hcpu
;
1381 case CPU_ONLINE_FROZEN
:
1382 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu
);
1383 fcoe_percpu_thread_create(cpu
);
1386 case CPU_DEAD_FROZEN
:
1387 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu
);
1388 fcoe_percpu_thread_destroy(cpu
);
1397 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1400 * This routine selects next CPU based on cpumask to distribute
1401 * incoming requests in round robin.
1403 * Returns: int CPU number
1405 static inline unsigned int fcoe_select_cpu(void)
1407 static unsigned int selected_cpu
;
1409 selected_cpu
= cpumask_next(selected_cpu
, cpu_online_mask
);
1410 if (selected_cpu
>= nr_cpu_ids
)
1411 selected_cpu
= cpumask_first(cpu_online_mask
);
1413 return selected_cpu
;
1417 * fcoe_rcv() - Receive packets from a net device
1418 * @skb: The received packet
1419 * @netdev: The net device that the packet was received on
1420 * @ptype: The packet type context
1421 * @olddev: The last device net device
1423 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1424 * FC frame and passes the frame to libfc.
1426 * Returns: 0 for success
1428 static int fcoe_rcv(struct sk_buff
*skb
, struct net_device
*netdev
,
1429 struct packet_type
*ptype
, struct net_device
*olddev
)
1431 struct fc_lport
*lport
;
1432 struct fcoe_rcv_info
*fr
;
1433 struct fcoe_ctlr
*ctlr
;
1434 struct fcoe_interface
*fcoe
;
1435 struct fc_frame_header
*fh
;
1436 struct fcoe_percpu_s
*fps
;
1440 fcoe
= container_of(ptype
, struct fcoe_interface
, fcoe_packet_type
);
1441 ctlr
= fcoe_to_ctlr(fcoe
);
1443 if (unlikely(!lport
)) {
1444 FCOE_NETDEV_DBG(netdev
, "Cannot find hba structure\n");
1447 if (!lport
->link_up
)
1450 FCOE_NETDEV_DBG(netdev
,
1451 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1452 skb
->len
, skb
->data_len
, skb
->head
, skb
->data
,
1453 skb_tail_pointer(skb
), skb_end_pointer(skb
),
1454 skb
->csum
, skb
->dev
? skb
->dev
->name
: "<NULL>");
1457 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1464 if (is_fip_mode(ctlr
) &&
1465 !ether_addr_equal(eh
->h_source
, ctlr
->dest_addr
)) {
1466 FCOE_NETDEV_DBG(netdev
, "wrong source mac address:%pM\n",
1472 * Check for minimum frame length, and make sure required FCoE
1473 * and FC headers are pulled into the linear data area.
1475 if (unlikely((skb
->len
< FCOE_MIN_FRAME
) ||
1476 !pskb_may_pull(skb
, FCOE_HEADER_LEN
)))
1479 skb_set_transport_header(skb
, sizeof(struct fcoe_hdr
));
1480 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1482 if (ntoh24(&eh
->h_dest
[3]) != ntoh24(fh
->fh_d_id
)) {
1483 FCOE_NETDEV_DBG(netdev
, "FC frame d_id mismatch with MAC:%pM\n",
1488 fr
= fcoe_dev_from_skb(skb
);
1492 * In case the incoming frame's exchange is originated from
1493 * the initiator, then received frame's exchange id is ANDed
1494 * with fc_cpu_mask bits to get the same cpu on which exchange
1495 * was originated, otherwise select cpu using rx exchange id
1496 * or fcoe_select_cpu().
1498 if (ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)
1499 cpu
= ntohs(fh
->fh_ox_id
) & fc_cpu_mask
;
1501 if (ntohs(fh
->fh_rx_id
) == FC_XID_UNKNOWN
)
1502 cpu
= fcoe_select_cpu();
1504 cpu
= ntohs(fh
->fh_rx_id
) & fc_cpu_mask
;
1507 if (cpu
>= nr_cpu_ids
)
1510 fps
= &per_cpu(fcoe_percpu
, cpu
);
1511 spin_lock(&fps
->fcoe_rx_list
.lock
);
1512 if (unlikely(!fps
->thread
)) {
1514 * The targeted CPU is not ready, let's target
1515 * the first CPU now. For non-SMP systems this
1516 * will check the same CPU twice.
1518 FCOE_NETDEV_DBG(netdev
, "CPU is online, but no receive thread "
1519 "ready for incoming skb- using first online "
1522 spin_unlock(&fps
->fcoe_rx_list
.lock
);
1523 cpu
= cpumask_first(cpu_online_mask
);
1524 fps
= &per_cpu(fcoe_percpu
, cpu
);
1525 spin_lock(&fps
->fcoe_rx_list
.lock
);
1527 spin_unlock(&fps
->fcoe_rx_list
.lock
);
1533 * We now have a valid CPU that we're targeting for
1534 * this skb. We also have this receive thread locked,
1535 * so we're free to queue skbs into it's queue.
1539 * Note: We used to have a set of conditions under which we would
1540 * call fcoe_recv_frame directly, rather than queuing to the rx list
1541 * as it could save a few cycles, but doing so is prohibited, as
1542 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1543 * in softirq context.
1545 __skb_queue_tail(&fps
->fcoe_rx_list
, skb
);
1546 if (fps
->thread
->state
== TASK_INTERRUPTIBLE
)
1547 wake_up_process(fps
->thread
);
1548 spin_unlock(&fps
->fcoe_rx_list
.lock
);
1550 return NET_RX_SUCCESS
;
1552 per_cpu_ptr(lport
->stats
, get_cpu())->ErrorFrames
++;
1560 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1561 * @skb: The packet to be transmitted
1562 * @tlen: The total length of the trailer
1564 * Returns: 0 for success
1566 static int fcoe_alloc_paged_crc_eof(struct sk_buff
*skb
, int tlen
)
1568 struct fcoe_percpu_s
*fps
;
1571 fps
= &get_cpu_var(fcoe_percpu
);
1572 rc
= fcoe_get_paged_crc_eof(skb
, tlen
, fps
);
1573 put_cpu_var(fcoe_percpu
);
1579 * fcoe_xmit() - Transmit a FCoE frame
1580 * @lport: The local port that the frame is to be transmitted for
1581 * @fp: The frame to be transmitted
1583 * Return: 0 for success
1585 static int fcoe_xmit(struct fc_lport
*lport
, struct fc_frame
*fp
)
1590 struct fcoe_crc_eof
*cp
;
1591 struct sk_buff
*skb
;
1592 struct fc_stats
*stats
;
1593 struct fc_frame_header
*fh
;
1594 unsigned int hlen
; /* header length implies the version */
1595 unsigned int tlen
; /* trailer length */
1596 unsigned int elen
; /* eth header, may include vlan */
1597 struct fcoe_port
*port
= lport_priv(lport
);
1598 struct fcoe_interface
*fcoe
= port
->priv
;
1599 struct fcoe_ctlr
*ctlr
= fcoe_to_ctlr(fcoe
);
1601 struct fcoe_hdr
*hp
;
1603 WARN_ON((fr_len(fp
) % sizeof(u32
)) != 0);
1605 fh
= fc_frame_header_get(fp
);
1607 wlen
= skb
->len
/ FCOE_WORD_TO_BYTE
;
1609 if (!lport
->link_up
) {
1614 if (unlikely(fh
->fh_type
== FC_TYPE_ELS
) &&
1615 fcoe_ctlr_els_send(ctlr
, lport
, skb
))
1621 elen
= sizeof(struct ethhdr
);
1622 hlen
= sizeof(struct fcoe_hdr
);
1623 tlen
= sizeof(struct fcoe_crc_eof
);
1624 wlen
= (skb
->len
- tlen
+ sizeof(crc
)) / FCOE_WORD_TO_BYTE
;
1627 if (likely(lport
->crc_offload
)) {
1628 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1629 skb
->csum_start
= skb_headroom(skb
);
1630 skb
->csum_offset
= skb
->len
;
1633 skb
->ip_summed
= CHECKSUM_NONE
;
1634 crc
= fcoe_fc_crc(fp
);
1637 /* copy port crc and eof to the skb buff */
1638 if (skb_is_nonlinear(skb
)) {
1640 if (fcoe_alloc_paged_crc_eof(skb
, tlen
)) {
1644 frag
= &skb_shinfo(skb
)->frags
[skb_shinfo(skb
)->nr_frags
- 1];
1645 cp
= kmap_atomic(skb_frag_page(frag
))
1646 + frag
->page_offset
;
1648 cp
= (struct fcoe_crc_eof
*)skb_put(skb
, tlen
);
1651 memset(cp
, 0, sizeof(*cp
));
1653 cp
->fcoe_crc32
= cpu_to_le32(~crc
);
1655 if (skb_is_nonlinear(skb
)) {
1660 /* adjust skb network/transport offsets to match mac/fcoe/port */
1661 skb_push(skb
, elen
+ hlen
);
1662 skb_reset_mac_header(skb
);
1663 skb_reset_network_header(skb
);
1664 skb
->mac_len
= elen
;
1665 skb
->protocol
= htons(ETH_P_FCOE
);
1666 skb
->priority
= fcoe
->priority
;
1668 if (fcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
&&
1669 fcoe
->realdev
->features
& NETIF_F_HW_VLAN_CTAG_TX
) {
1670 /* must set skb->dev before calling vlan_put_tag */
1671 skb
->dev
= fcoe
->realdev
;
1672 skb
= __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
),
1673 vlan_dev_vlan_id(fcoe
->netdev
));
1677 skb
->dev
= fcoe
->netdev
;
1679 /* fill up mac and fcoe headers */
1681 eh
->h_proto
= htons(ETH_P_FCOE
);
1682 memcpy(eh
->h_dest
, ctlr
->dest_addr
, ETH_ALEN
);
1684 memcpy(eh
->h_dest
+ 3, fh
->fh_d_id
, 3);
1686 if (unlikely(ctlr
->flogi_oxid
!= FC_XID_UNKNOWN
))
1687 memcpy(eh
->h_source
, ctlr
->ctl_src_addr
, ETH_ALEN
);
1689 memcpy(eh
->h_source
, port
->data_src_addr
, ETH_ALEN
);
1691 hp
= (struct fcoe_hdr
*)(eh
+ 1);
1692 memset(hp
, 0, sizeof(*hp
));
1694 FC_FCOE_ENCAPS_VER(hp
, FC_FCOE_VER
);
1697 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1698 if (lport
->seq_offload
&& fr_max_payload(fp
)) {
1699 skb_shinfo(skb
)->gso_type
= SKB_GSO_FCOE
;
1700 skb_shinfo(skb
)->gso_size
= fr_max_payload(fp
);
1702 skb_shinfo(skb
)->gso_type
= 0;
1703 skb_shinfo(skb
)->gso_size
= 0;
1705 /* update tx stats: regardless if LLD fails */
1706 stats
= per_cpu_ptr(lport
->stats
, get_cpu());
1708 stats
->TxWords
+= wlen
;
1711 /* send down to lld */
1713 fcoe_port_send(port
, skb
);
1718 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1719 * @skb: The completed skb (argument required by destructor)
1721 static void fcoe_percpu_flush_done(struct sk_buff
*skb
)
1723 complete(&fcoe_flush_completion
);
1727 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1728 * @lport: The local port the frame was received on
1729 * @fp: The received frame
1731 * Return: 0 on passing filtering checks
1733 static inline int fcoe_filter_frames(struct fc_lport
*lport
,
1734 struct fc_frame
*fp
)
1736 struct fcoe_ctlr
*ctlr
;
1737 struct fcoe_interface
*fcoe
;
1738 struct fc_frame_header
*fh
;
1739 struct sk_buff
*skb
= (struct sk_buff
*)fp
;
1740 struct fc_stats
*stats
;
1743 * We only check CRC if no offload is available and if it is
1744 * it's solicited data, in which case, the FCP layer would
1745 * check it during the copy.
1747 if (lport
->crc_offload
&& skb
->ip_summed
== CHECKSUM_UNNECESSARY
)
1748 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1750 fr_flags(fp
) |= FCPHF_CRC_UNCHECKED
;
1752 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1753 fh
= fc_frame_header_get(fp
);
1754 if (fh
->fh_r_ctl
== FC_RCTL_DD_SOL_DATA
&& fh
->fh_type
== FC_TYPE_FCP
)
1757 fcoe
= ((struct fcoe_port
*)lport_priv(lport
))->priv
;
1758 ctlr
= fcoe_to_ctlr(fcoe
);
1759 if (is_fip_mode(ctlr
) && fc_frame_payload_op(fp
) == ELS_LOGO
&&
1760 ntoh24(fh
->fh_s_id
) == FC_FID_FLOGI
) {
1761 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1765 if (!(fr_flags(fp
) & FCPHF_CRC_UNCHECKED
) ||
1766 le32_to_cpu(fr_crc(fp
)) == ~crc32(~0, skb
->data
, skb
->len
)) {
1767 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1771 stats
= per_cpu_ptr(lport
->stats
, get_cpu());
1772 stats
->InvalidCRCCount
++;
1773 if (stats
->InvalidCRCCount
< 5)
1774 printk(KERN_WARNING
"fcoe: dropping frame with CRC error\n");
1780 * fcoe_recv_frame() - process a single received frame
1781 * @skb: frame to process
1783 static void fcoe_recv_frame(struct sk_buff
*skb
)
1786 struct fc_lport
*lport
;
1787 struct fcoe_rcv_info
*fr
;
1788 struct fc_stats
*stats
;
1789 struct fcoe_crc_eof crc_eof
;
1790 struct fc_frame
*fp
;
1791 struct fcoe_port
*port
;
1792 struct fcoe_hdr
*hp
;
1794 fr
= fcoe_dev_from_skb(skb
);
1796 if (unlikely(!lport
)) {
1797 if (skb
->destructor
!= fcoe_percpu_flush_done
)
1798 FCOE_NETDEV_DBG(skb
->dev
, "NULL lport in skb\n");
1803 FCOE_NETDEV_DBG(skb
->dev
,
1804 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1805 skb
->len
, skb
->data_len
,
1806 skb
->head
, skb
->data
, skb_tail_pointer(skb
),
1807 skb_end_pointer(skb
), skb
->csum
,
1808 skb
->dev
? skb
->dev
->name
: "<NULL>");
1810 port
= lport_priv(lport
);
1811 skb_linearize(skb
); /* check for skb_is_nonlinear is within skb_linearize */
1814 * Frame length checks and setting up the header pointers
1815 * was done in fcoe_rcv already.
1817 hp
= (struct fcoe_hdr
*) skb_network_header(skb
);
1819 stats
= per_cpu_ptr(lport
->stats
, get_cpu());
1820 if (unlikely(FC_FCOE_DECAPS_VER(hp
) != FC_FCOE_VER
)) {
1821 if (stats
->ErrorFrames
< 5)
1822 printk(KERN_WARNING
"fcoe: FCoE version "
1823 "mismatch: The frame has "
1824 "version %x, but the "
1825 "initiator supports version "
1826 "%x\n", FC_FCOE_DECAPS_VER(hp
),
1831 skb_pull(skb
, sizeof(struct fcoe_hdr
));
1832 fr_len
= skb
->len
- sizeof(struct fcoe_crc_eof
);
1835 stats
->RxWords
+= fr_len
/ FCOE_WORD_TO_BYTE
;
1837 fp
= (struct fc_frame
*)skb
;
1840 fr_sof(fp
) = hp
->fcoe_sof
;
1842 /* Copy out the CRC and EOF trailer for access */
1843 if (skb_copy_bits(skb
, fr_len
, &crc_eof
, sizeof(crc_eof
)))
1845 fr_eof(fp
) = crc_eof
.fcoe_eof
;
1846 fr_crc(fp
) = crc_eof
.fcoe_crc32
;
1847 if (pskb_trim(skb
, fr_len
))
1850 if (!fcoe_filter_frames(lport
, fp
)) {
1852 fc_exch_recv(lport
, fp
);
1856 stats
->ErrorFrames
++;
1862 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1863 * @arg: The per-CPU context
1865 * Return: 0 for success
1867 static int fcoe_percpu_receive_thread(void *arg
)
1869 struct fcoe_percpu_s
*p
= arg
;
1870 struct sk_buff
*skb
;
1871 struct sk_buff_head tmp
;
1873 skb_queue_head_init(&tmp
);
1875 set_user_nice(current
, MIN_NICE
);
1878 while (!kthread_should_stop()) {
1880 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1881 skb_queue_splice_init(&p
->fcoe_rx_list
, &tmp
);
1883 if (!skb_queue_len(&tmp
)) {
1884 set_current_state(TASK_INTERRUPTIBLE
);
1885 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1890 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1892 while ((skb
= __skb_dequeue(&tmp
)) != NULL
)
1893 fcoe_recv_frame(skb
);
1900 * fcoe_dev_setup() - Setup the link change notification interface
1902 static void fcoe_dev_setup(void)
1904 register_dcbevent_notifier(&dcb_notifier
);
1905 register_netdevice_notifier(&fcoe_notifier
);
1909 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1911 static void fcoe_dev_cleanup(void)
1913 unregister_dcbevent_notifier(&dcb_notifier
);
1914 unregister_netdevice_notifier(&fcoe_notifier
);
1917 static struct fcoe_interface
*
1918 fcoe_hostlist_lookup_realdev_port(struct net_device
*netdev
)
1920 struct fcoe_interface
*fcoe
;
1921 struct net_device
*real_dev
;
1923 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
1924 if (fcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
1925 real_dev
= vlan_dev_real_dev(fcoe
->netdev
);
1927 real_dev
= fcoe
->netdev
;
1929 if (netdev
== real_dev
)
1935 static int fcoe_dcb_app_notification(struct notifier_block
*notifier
,
1936 ulong event
, void *ptr
)
1938 struct dcb_app_type
*entry
= ptr
;
1939 struct fcoe_ctlr
*ctlr
;
1940 struct fcoe_interface
*fcoe
;
1941 struct net_device
*netdev
;
1944 if (entry
->app
.selector
!= DCB_APP_IDTYPE_ETHTYPE
)
1947 netdev
= dev_get_by_index(&init_net
, entry
->ifindex
);
1951 fcoe
= fcoe_hostlist_lookup_realdev_port(netdev
);
1956 ctlr
= fcoe_to_ctlr(fcoe
);
1958 if (entry
->dcbx
& DCB_CAP_DCBX_VER_CEE
)
1959 prio
= ffs(entry
->app
.priority
) - 1;
1961 prio
= entry
->app
.priority
;
1966 if (entry
->app
.protocol
== ETH_P_FIP
||
1967 entry
->app
.protocol
== ETH_P_FCOE
)
1968 ctlr
->priority
= prio
;
1970 if (entry
->app
.protocol
== ETH_P_FCOE
)
1971 fcoe
->priority
= prio
;
1977 * fcoe_device_notification() - Handler for net device events
1978 * @notifier: The context of the notification
1979 * @event: The type of event
1980 * @ptr: The net device that the event was on
1982 * This function is called by the Ethernet driver in case of link change event.
1984 * Returns: 0 for success
1986 static int fcoe_device_notification(struct notifier_block
*notifier
,
1987 ulong event
, void *ptr
)
1989 struct fcoe_ctlr_device
*cdev
;
1990 struct fc_lport
*lport
= NULL
;
1991 struct net_device
*netdev
= netdev_notifier_info_to_dev(ptr
);
1992 struct fcoe_ctlr
*ctlr
;
1993 struct fcoe_interface
*fcoe
;
1994 struct fcoe_port
*port
;
1995 struct fc_stats
*stats
;
1996 u32 link_possible
= 1;
2000 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
2001 if (fcoe
->netdev
== netdev
) {
2002 ctlr
= fcoe_to_ctlr(fcoe
);
2014 case NETDEV_GOING_DOWN
:
2020 case NETDEV_CHANGEMTU
:
2021 if (netdev
->features
& NETIF_F_FCOE_MTU
)
2023 mfs
= netdev
->mtu
- (sizeof(struct fcoe_hdr
) +
2024 sizeof(struct fcoe_crc_eof
));
2025 if (mfs
>= FC_MIN_MAX_FRAME
)
2026 fc_set_mfs(lport
, mfs
);
2028 case NETDEV_REGISTER
:
2030 case NETDEV_UNREGISTER
:
2031 list_del(&fcoe
->list
);
2032 port
= lport_priv(ctlr
->lp
);
2033 queue_work(fcoe_wq
, &port
->destroy_work
);
2036 case NETDEV_FEAT_CHANGE
:
2037 fcoe_netdev_features_change(lport
, netdev
);
2040 FCOE_NETDEV_DBG(netdev
, "Unknown event %ld "
2041 "from netdev netlink\n", event
);
2044 fcoe_link_speed_update(lport
);
2046 cdev
= fcoe_ctlr_to_ctlr_dev(ctlr
);
2048 if (link_possible
&& !fcoe_link_ok(lport
)) {
2049 switch (cdev
->enabled
) {
2050 case FCOE_CTLR_DISABLED
:
2051 pr_info("Link up while interface is disabled.\n");
2053 case FCOE_CTLR_ENABLED
:
2054 case FCOE_CTLR_UNUSED
:
2055 fcoe_ctlr_link_up(ctlr
);
2057 } else if (fcoe_ctlr_link_down(ctlr
)) {
2058 switch (cdev
->enabled
) {
2059 case FCOE_CTLR_DISABLED
:
2060 pr_info("Link down while interface is disabled.\n");
2062 case FCOE_CTLR_ENABLED
:
2063 case FCOE_CTLR_UNUSED
:
2064 stats
= per_cpu_ptr(lport
->stats
, get_cpu());
2065 stats
->LinkFailureCount
++;
2067 fcoe_clean_pending_queue(lport
);
2075 * fcoe_disable() - Disables a FCoE interface
2076 * @netdev : The net_device object the Ethernet interface to create on
2078 * Called from fcoe transport.
2080 * Returns: 0 for success
2082 * Deprecated: use fcoe_ctlr_enabled()
2084 static int fcoe_disable(struct net_device
*netdev
)
2086 struct fcoe_ctlr
*ctlr
;
2087 struct fcoe_interface
*fcoe
;
2090 mutex_lock(&fcoe_config_mutex
);
2093 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2097 ctlr
= fcoe_to_ctlr(fcoe
);
2098 fcoe_ctlr_link_down(ctlr
);
2099 fcoe_clean_pending_queue(ctlr
->lp
);
2103 mutex_unlock(&fcoe_config_mutex
);
2108 * fcoe_enable() - Enables a FCoE interface
2109 * @netdev : The net_device object the Ethernet interface to create on
2111 * Called from fcoe transport.
2113 * Returns: 0 for success
2115 static int fcoe_enable(struct net_device
*netdev
)
2117 struct fcoe_ctlr
*ctlr
;
2118 struct fcoe_interface
*fcoe
;
2121 mutex_lock(&fcoe_config_mutex
);
2123 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2131 ctlr
= fcoe_to_ctlr(fcoe
);
2133 if (!fcoe_link_ok(ctlr
->lp
))
2134 fcoe_ctlr_link_up(ctlr
);
2137 mutex_unlock(&fcoe_config_mutex
);
2142 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
2143 * @cdev: The FCoE Controller that is being enabled or disabled
2145 * fcoe_sysfs will ensure that the state of 'enabled' has
2146 * changed, so no checking is necessary here. This routine simply
2147 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
2148 * When those routines are removed the functionality can be merged
2151 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device
*cdev
)
2153 struct fcoe_ctlr
*ctlr
= fcoe_ctlr_device_priv(cdev
);
2154 struct fc_lport
*lport
= ctlr
->lp
;
2155 struct net_device
*netdev
= fcoe_netdev(lport
);
2157 switch (cdev
->enabled
) {
2158 case FCOE_CTLR_ENABLED
:
2159 return fcoe_enable(netdev
);
2160 case FCOE_CTLR_DISABLED
:
2161 return fcoe_disable(netdev
);
2162 case FCOE_CTLR_UNUSED
:
2169 * fcoe_destroy() - Destroy a FCoE interface
2170 * @netdev : The net_device object the Ethernet interface to create on
2172 * Called from fcoe transport
2174 * Returns: 0 for success
2176 static int fcoe_destroy(struct net_device
*netdev
)
2178 struct fcoe_ctlr
*ctlr
;
2179 struct fcoe_interface
*fcoe
;
2180 struct fc_lport
*lport
;
2181 struct fcoe_port
*port
;
2184 mutex_lock(&fcoe_config_mutex
);
2186 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2191 ctlr
= fcoe_to_ctlr(fcoe
);
2193 port
= lport_priv(lport
);
2194 list_del(&fcoe
->list
);
2195 queue_work(fcoe_wq
, &port
->destroy_work
);
2198 mutex_unlock(&fcoe_config_mutex
);
2203 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2204 * @work: Handle to the FCoE port to be destroyed
2206 static void fcoe_destroy_work(struct work_struct
*work
)
2208 struct fcoe_ctlr_device
*cdev
;
2209 struct fcoe_ctlr
*ctlr
;
2210 struct fcoe_port
*port
;
2211 struct fcoe_interface
*fcoe
;
2212 struct Scsi_Host
*shost
;
2213 struct fc_host_attrs
*fc_host
;
2214 unsigned long flags
;
2215 struct fc_vport
*vport
;
2216 struct fc_vport
*next_vport
;
2218 port
= container_of(work
, struct fcoe_port
, destroy_work
);
2219 shost
= port
->lport
->host
;
2220 fc_host
= shost_to_fc_host(shost
);
2222 /* Loop through all the vports and mark them for deletion */
2223 spin_lock_irqsave(shost
->host_lock
, flags
);
2224 list_for_each_entry_safe(vport
, next_vport
, &fc_host
->vports
, peers
) {
2225 if (vport
->flags
& (FC_VPORT_DEL
| FC_VPORT_CREATING
)) {
2228 vport
->flags
|= FC_VPORT_DELETING
;
2229 queue_work(fc_host_work_q(shost
),
2230 &vport
->vport_delete_work
);
2233 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2235 flush_workqueue(fc_host_work_q(shost
));
2237 mutex_lock(&fcoe_config_mutex
);
2240 ctlr
= fcoe_to_ctlr(fcoe
);
2241 cdev
= fcoe_ctlr_to_ctlr_dev(ctlr
);
2243 fcoe_if_destroy(port
->lport
);
2244 fcoe_interface_cleanup(fcoe
);
2246 mutex_unlock(&fcoe_config_mutex
);
2248 fcoe_ctlr_device_delete(cdev
);
2252 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2253 * @netdev : The net_device object the Ethernet interface to create on
2255 * Called from fcoe transport.
2257 * Returns: always returns true as this is the default FCoE transport,
2258 * i.e., support all netdevs.
2260 static bool fcoe_match(struct net_device
*netdev
)
2266 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2267 * @netdev: The net_device object of the L2 link that should be queried
2268 * @port: The fcoe_port to bind FCoE APP priority with
2271 static void fcoe_dcb_create(struct fcoe_interface
*fcoe
)
2276 struct net_device
*netdev
= fcoe
->realdev
;
2277 struct fcoe_ctlr
*ctlr
= fcoe_to_ctlr(fcoe
);
2278 struct dcb_app app
= {
2280 .protocol
= ETH_P_FCOE
2283 /* setup DCB priority attributes. */
2284 if (netdev
&& netdev
->dcbnl_ops
&& netdev
->dcbnl_ops
->getdcbx
) {
2285 dcbx
= netdev
->dcbnl_ops
->getdcbx(netdev
);
2287 if (dcbx
& DCB_CAP_DCBX_VER_IEEE
) {
2288 app
.selector
= IEEE_8021QAZ_APP_SEL_ETHERTYPE
;
2289 up
= dcb_ieee_getapp_mask(netdev
, &app
);
2290 app
.protocol
= ETH_P_FIP
;
2291 fup
= dcb_ieee_getapp_mask(netdev
, &app
);
2293 app
.selector
= DCB_APP_IDTYPE_ETHTYPE
;
2294 up
= dcb_getapp(netdev
, &app
);
2295 app
.protocol
= ETH_P_FIP
;
2296 fup
= dcb_getapp(netdev
, &app
);
2299 fcoe
->priority
= ffs(up
) ? ffs(up
) - 1 : 0;
2300 ctlr
->priority
= ffs(fup
) ? ffs(fup
) - 1 : fcoe
->priority
;
2305 enum fcoe_create_link_state
{
2306 FCOE_CREATE_LINK_DOWN
,
2307 FCOE_CREATE_LINK_UP
,
2311 * _fcoe_create() - (internal) Create a fcoe interface
2312 * @netdev : The net_device object the Ethernet interface to create on
2313 * @fip_mode: The FIP mode for this creation
2314 * @link_state: The ctlr link state on creation
2316 * Called from either the libfcoe 'create' module parameter
2317 * via fcoe_create or from fcoe_syfs's ctlr_create file.
2319 * libfcoe's 'create' module parameter is deprecated so some
2320 * consolidation of code can be done when that interface is
2323 static int _fcoe_create(struct net_device
*netdev
, enum fip_state fip_mode
,
2324 enum fcoe_create_link_state link_state
)
2327 struct fcoe_ctlr_device
*ctlr_dev
;
2328 struct fcoe_ctlr
*ctlr
;
2329 struct fcoe_interface
*fcoe
;
2330 struct fc_lport
*lport
;
2332 mutex_lock(&fcoe_config_mutex
);
2335 /* look for existing lport */
2336 if (fcoe_hostlist_lookup(netdev
)) {
2341 fcoe
= fcoe_interface_create(netdev
, fip_mode
);
2347 ctlr
= fcoe_to_ctlr(fcoe
);
2348 ctlr_dev
= fcoe_ctlr_to_ctlr_dev(ctlr
);
2349 lport
= fcoe_if_create(fcoe
, &ctlr_dev
->dev
, 0);
2350 if (IS_ERR(lport
)) {
2351 printk(KERN_ERR
"fcoe: Failed to create interface (%s)\n",
2355 fcoe_interface_cleanup(fcoe
);
2356 mutex_unlock(&fcoe_config_mutex
);
2357 fcoe_ctlr_device_delete(ctlr_dev
);
2361 /* Make this the "master" N_Port */
2364 /* setup DCB priority attributes. */
2365 fcoe_dcb_create(fcoe
);
2367 /* start FIP Discovery and FLOGI */
2368 lport
->boot_time
= jiffies
;
2369 fc_fabric_login(lport
);
2372 * If the fcoe_ctlr_device is to be set to DISABLED
2373 * it must be done after the lport is added to the
2374 * hostlist, but before the rtnl_lock is released.
2375 * This is because the rtnl_lock protects the
2376 * hostlist that fcoe_device_notification uses. If
2377 * the FCoE Controller is intended to be created
2378 * DISABLED then 'enabled' needs to be considered
2379 * handling link events. 'enabled' must be set
2380 * before the lport can be found in the hostlist
2381 * when a link up event is received.
2383 if (link_state
== FCOE_CREATE_LINK_UP
)
2384 ctlr_dev
->enabled
= FCOE_CTLR_ENABLED
;
2386 ctlr_dev
->enabled
= FCOE_CTLR_DISABLED
;
2388 if (link_state
== FCOE_CREATE_LINK_UP
&&
2389 !fcoe_link_ok(lport
)) {
2391 fcoe_ctlr_link_up(ctlr
);
2392 mutex_unlock(&fcoe_config_mutex
);
2398 mutex_unlock(&fcoe_config_mutex
);
2404 * fcoe_create() - Create a fcoe interface
2405 * @netdev : The net_device object the Ethernet interface to create on
2406 * @fip_mode: The FIP mode for this creation
2408 * Called from fcoe transport
2410 * Returns: 0 for success
2412 static int fcoe_create(struct net_device
*netdev
, enum fip_state fip_mode
)
2414 return _fcoe_create(netdev
, fip_mode
, FCOE_CREATE_LINK_UP
);
2418 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2419 * @netdev: The net_device to be used by the allocated FCoE Controller
2421 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2422 * in a link_down state. The allows the user an opportunity to configure
2423 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2425 * Creating in with this routine starts the FCoE Controller in Fabric
2426 * mode. The user can change to VN2VN or another mode before enabling.
2428 static int fcoe_ctlr_alloc(struct net_device
*netdev
)
2430 return _fcoe_create(netdev
, FIP_MODE_FABRIC
,
2431 FCOE_CREATE_LINK_DOWN
);
2435 * fcoe_link_ok() - Check if the link is OK for a local port
2436 * @lport: The local port to check link on
2438 * Returns: 0 if link is UP and OK, -1 if not
2441 static int fcoe_link_ok(struct fc_lport
*lport
)
2443 struct net_device
*netdev
= fcoe_netdev(lport
);
2445 if (netif_oper_up(netdev
))
2451 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2452 * @lport: The local port whose skbs are to be cleared
2454 * Must be called with fcoe_create_mutex held to single-thread completion.
2456 * This flushes the pending skbs by adding a new skb to each queue and
2457 * waiting until they are all freed. This assures us that not only are
2458 * there no packets that will be handled by the lport, but also that any
2459 * threads already handling packet have returned.
2461 static void fcoe_percpu_clean(struct fc_lport
*lport
)
2463 struct fcoe_percpu_s
*pp
;
2464 struct sk_buff
*skb
;
2467 for_each_possible_cpu(cpu
) {
2468 pp
= &per_cpu(fcoe_percpu
, cpu
);
2470 if (!pp
->thread
|| !cpu_online(cpu
))
2473 skb
= dev_alloc_skb(0);
2477 skb
->destructor
= fcoe_percpu_flush_done
;
2479 spin_lock_bh(&pp
->fcoe_rx_list
.lock
);
2480 __skb_queue_tail(&pp
->fcoe_rx_list
, skb
);
2481 if (pp
->fcoe_rx_list
.qlen
== 1)
2482 wake_up_process(pp
->thread
);
2483 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2485 wait_for_completion(&fcoe_flush_completion
);
2490 * fcoe_reset() - Reset a local port
2491 * @shost: The SCSI host associated with the local port to be reset
2493 * Returns: Always 0 (return value required by FC transport template)
2495 static int fcoe_reset(struct Scsi_Host
*shost
)
2497 struct fc_lport
*lport
= shost_priv(shost
);
2498 struct fcoe_port
*port
= lport_priv(lport
);
2499 struct fcoe_interface
*fcoe
= port
->priv
;
2500 struct fcoe_ctlr
*ctlr
= fcoe_to_ctlr(fcoe
);
2501 struct fcoe_ctlr_device
*cdev
= fcoe_ctlr_to_ctlr_dev(ctlr
);
2503 fcoe_ctlr_link_down(ctlr
);
2504 fcoe_clean_pending_queue(ctlr
->lp
);
2506 if (cdev
->enabled
!= FCOE_CTLR_DISABLED
&&
2507 !fcoe_link_ok(ctlr
->lp
))
2508 fcoe_ctlr_link_up(ctlr
);
2513 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2514 * @netdev: The net device used as a key
2516 * Locking: Must be called with the RNL mutex held.
2518 * Returns: NULL or the FCoE interface
2520 static struct fcoe_interface
*
2521 fcoe_hostlist_lookup_port(const struct net_device
*netdev
)
2523 struct fcoe_interface
*fcoe
;
2525 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
2526 if (fcoe
->netdev
== netdev
)
2533 * fcoe_hostlist_lookup() - Find the local port associated with a
2535 * @netdev: The netdevice used as a key
2537 * Locking: Must be called with the RTNL mutex held
2539 * Returns: NULL or the local port
2541 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*netdev
)
2543 struct fcoe_ctlr
*ctlr
;
2544 struct fcoe_interface
*fcoe
;
2546 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2547 ctlr
= fcoe_to_ctlr(fcoe
);
2548 return (fcoe
) ? ctlr
->lp
: NULL
;
2552 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2553 * port to the hostlist
2554 * @lport: The local port that identifies the FCoE interface to be added
2556 * Locking: must be called with the RTNL mutex held
2558 * Returns: 0 for success
2560 static int fcoe_hostlist_add(const struct fc_lport
*lport
)
2562 struct fcoe_interface
*fcoe
;
2563 struct fcoe_port
*port
;
2565 fcoe
= fcoe_hostlist_lookup_port(fcoe_netdev(lport
));
2567 port
= lport_priv(lport
);
2569 list_add_tail(&fcoe
->list
, &fcoe_hostlist
);
2575 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2576 * port to the hostlist
2577 * @lport: The local port that identifies the FCoE interface to be added
2579 * Locking: must be called with the RTNL mutex held
2582 static void fcoe_hostlist_del(const struct fc_lport
*lport
)
2584 struct fcoe_interface
*fcoe
;
2585 struct fcoe_port
*port
;
2587 port
= lport_priv(lport
);
2589 list_del(&fcoe
->list
);
2593 static struct fcoe_transport fcoe_sw_transport
= {
2594 .name
= {FCOE_TRANSPORT_DEFAULT
},
2596 .list
= LIST_HEAD_INIT(fcoe_sw_transport
.list
),
2597 .match
= fcoe_match
,
2598 .alloc
= fcoe_ctlr_alloc
,
2599 .create
= fcoe_create
,
2600 .destroy
= fcoe_destroy
,
2601 .enable
= fcoe_enable
,
2602 .disable
= fcoe_disable
,
2606 * fcoe_init() - Initialize fcoe.ko
2608 * Returns: 0 on success, or a negative value on failure
2610 static int __init
fcoe_init(void)
2612 struct fcoe_percpu_s
*p
;
2616 fcoe_wq
= alloc_workqueue("fcoe", 0, 0);
2620 /* register as a fcoe transport */
2621 rc
= fcoe_transport_attach(&fcoe_sw_transport
);
2623 printk(KERN_ERR
"failed to register an fcoe transport, check "
2624 "if libfcoe is loaded\n");
2628 mutex_lock(&fcoe_config_mutex
);
2630 for_each_possible_cpu(cpu
) {
2631 p
= &per_cpu(fcoe_percpu
, cpu
);
2632 skb_queue_head_init(&p
->fcoe_rx_list
);
2635 cpu_notifier_register_begin();
2637 for_each_online_cpu(cpu
)
2638 fcoe_percpu_thread_create(cpu
);
2640 /* Initialize per CPU interrupt thread */
2641 rc
= __register_hotcpu_notifier(&fcoe_cpu_notifier
);
2645 cpu_notifier_register_done();
2647 /* Setup link change notification */
2650 rc
= fcoe_if_init();
2654 mutex_unlock(&fcoe_config_mutex
);
2658 for_each_online_cpu(cpu
) {
2659 fcoe_percpu_thread_destroy(cpu
);
2662 cpu_notifier_register_done();
2664 mutex_unlock(&fcoe_config_mutex
);
2665 destroy_workqueue(fcoe_wq
);
2668 module_init(fcoe_init
);
2671 * fcoe_exit() - Clean up fcoe.ko
2673 * Returns: 0 on success or a negative value on failure
2675 static void __exit
fcoe_exit(void)
2677 struct fcoe_interface
*fcoe
, *tmp
;
2678 struct fcoe_ctlr
*ctlr
;
2679 struct fcoe_port
*port
;
2682 mutex_lock(&fcoe_config_mutex
);
2686 /* releases the associated fcoe hosts */
2688 list_for_each_entry_safe(fcoe
, tmp
, &fcoe_hostlist
, list
) {
2689 ctlr
= fcoe_to_ctlr(fcoe
);
2690 port
= lport_priv(ctlr
->lp
);
2691 fcoe_hostlist_del(port
->lport
);
2692 queue_work(fcoe_wq
, &port
->destroy_work
);
2696 cpu_notifier_register_begin();
2698 for_each_online_cpu(cpu
)
2699 fcoe_percpu_thread_destroy(cpu
);
2701 __unregister_hotcpu_notifier(&fcoe_cpu_notifier
);
2703 cpu_notifier_register_done();
2705 mutex_unlock(&fcoe_config_mutex
);
2708 * destroy_work's may be chained but destroy_workqueue()
2709 * can take care of them. Just kill the fcoe_wq.
2711 destroy_workqueue(fcoe_wq
);
2714 * Detaching from the scsi transport must happen after all
2715 * destroys are done on the fcoe_wq. destroy_workqueue will
2716 * enusre the fcoe_wq is flushed.
2720 /* detach from fcoe transport */
2721 fcoe_transport_detach(&fcoe_sw_transport
);
2723 module_exit(fcoe_exit
);
2726 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2727 * @seq: active sequence in the FLOGI or FDISC exchange
2728 * @fp: response frame, or error encoded in a pointer (timeout)
2729 * @arg: pointer the the fcoe_ctlr structure
2731 * This handles MAC address management for FCoE, then passes control on to
2732 * the libfc FLOGI response handler.
2734 static void fcoe_flogi_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2736 struct fcoe_ctlr
*fip
= arg
;
2737 struct fc_exch
*exch
= fc_seq_exch(seq
);
2738 struct fc_lport
*lport
= exch
->lp
;
2744 mac
= fr_cb(fp
)->granted_mac
;
2746 if (is_zero_ether_addr(mac
))
2747 fcoe_ctlr_recv_flogi(fip
, lport
, fp
);
2748 if (!is_zero_ether_addr(mac
))
2749 fcoe_update_src_mac(lport
, mac
);
2751 fc_lport_flogi_resp(seq
, fp
, lport
);
2755 * fcoe_logo_resp() - FCoE specific LOGO response handler
2756 * @seq: active sequence in the LOGO exchange
2757 * @fp: response frame, or error encoded in a pointer (timeout)
2758 * @arg: pointer the the fcoe_ctlr structure
2760 * This handles MAC address management for FCoE, then passes control on to
2761 * the libfc LOGO response handler.
2763 static void fcoe_logo_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2765 struct fc_lport
*lport
= arg
;
2766 static u8 zero_mac
[ETH_ALEN
] = { 0 };
2769 fcoe_update_src_mac(lport
, zero_mac
);
2770 fc_lport_logo_resp(seq
, fp
, lport
);
2774 * fcoe_elsct_send - FCoE specific ELS handler
2776 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2777 * using FCoE specific response handlers and passing the FIP controller as
2778 * the argument (the lport is still available from the exchange).
2780 * Most of the work here is just handed off to the libfc routine.
2782 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*lport
, u32 did
,
2783 struct fc_frame
*fp
, unsigned int op
,
2784 void (*resp
)(struct fc_seq
*,
2787 void *arg
, u32 timeout
)
2789 struct fcoe_port
*port
= lport_priv(lport
);
2790 struct fcoe_interface
*fcoe
= port
->priv
;
2791 struct fcoe_ctlr
*fip
= fcoe_to_ctlr(fcoe
);
2792 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
2797 if (lport
->point_to_multipoint
)
2799 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_flogi_resp
,
2802 /* only hook onto fabric logouts, not port logouts */
2803 if (ntoh24(fh
->fh_d_id
) != FC_FID_FLOGI
)
2805 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_logo_resp
,
2808 return fc_elsct_send(lport
, did
, fp
, op
, resp
, arg
, timeout
);
2812 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2813 * @vport: fc_vport object to create a new fc_host for
2814 * @disabled: start the new fc_host in a disabled state by default?
2816 * Returns: 0 for success
2818 static int fcoe_vport_create(struct fc_vport
*vport
, bool disabled
)
2820 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2821 struct fc_lport
*n_port
= shost_priv(shost
);
2822 struct fcoe_port
*port
= lport_priv(n_port
);
2823 struct fcoe_interface
*fcoe
= port
->priv
;
2824 struct net_device
*netdev
= fcoe
->netdev
;
2825 struct fc_lport
*vn_port
;
2829 rc
= fcoe_validate_vport_create(vport
);
2831 fcoe_wwn_to_str(vport
->port_name
, buf
, sizeof(buf
));
2832 printk(KERN_ERR
"fcoe: Failed to create vport, "
2833 "WWPN (0x%s) already exists\n",
2838 mutex_lock(&fcoe_config_mutex
);
2840 vn_port
= fcoe_if_create(fcoe
, &vport
->dev
, 1);
2842 mutex_unlock(&fcoe_config_mutex
);
2844 if (IS_ERR(vn_port
)) {
2845 printk(KERN_ERR
"fcoe: fcoe_vport_create(%s) failed\n",
2851 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2853 vn_port
->boot_time
= jiffies
;
2854 fc_fabric_login(vn_port
);
2855 fc_vport_setlink(vn_port
);
2861 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2862 * @vport: fc_vport object that is being destroyed
2864 * Returns: 0 for success
2866 static int fcoe_vport_destroy(struct fc_vport
*vport
)
2868 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2869 struct fc_lport
*n_port
= shost_priv(shost
);
2870 struct fc_lport
*vn_port
= vport
->dd_data
;
2872 mutex_lock(&n_port
->lp_mutex
);
2873 list_del(&vn_port
->list
);
2874 mutex_unlock(&n_port
->lp_mutex
);
2876 mutex_lock(&fcoe_config_mutex
);
2877 fcoe_if_destroy(vn_port
);
2878 mutex_unlock(&fcoe_config_mutex
);
2884 * fcoe_vport_disable() - change vport state
2885 * @vport: vport to bring online/offline
2886 * @disable: should the vport be disabled?
2888 static int fcoe_vport_disable(struct fc_vport
*vport
, bool disable
)
2890 struct fc_lport
*lport
= vport
->dd_data
;
2893 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2894 fc_fabric_logoff(lport
);
2896 lport
->boot_time
= jiffies
;
2897 fc_fabric_login(lport
);
2898 fc_vport_setlink(lport
);
2905 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2906 * @vport: fc_vport with a new symbolic name string
2908 * After generating a new symbolic name string, a new RSPN_ID request is
2909 * sent to the name server. There is no response handler, so if it fails
2910 * for some reason it will not be retried.
2912 static void fcoe_set_vport_symbolic_name(struct fc_vport
*vport
)
2914 struct fc_lport
*lport
= vport
->dd_data
;
2915 struct fc_frame
*fp
;
2918 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
2919 "%s v%s over %s : %s", FCOE_NAME
, FCOE_VERSION
,
2920 fcoe_netdev(lport
)->name
, vport
->symbolic_name
);
2922 if (lport
->state
!= LPORT_ST_READY
)
2925 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
2926 fp
= fc_frame_alloc(lport
,
2927 sizeof(struct fc_ct_hdr
) +
2928 sizeof(struct fc_ns_rspn
) + len
);
2931 lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, FC_NS_RSPN_ID
,
2932 NULL
, NULL
, 3 * lport
->r_a_tov
);
2935 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device
*fcf_dev
)
2937 struct fcoe_ctlr_device
*ctlr_dev
=
2938 fcoe_fcf_dev_to_ctlr_dev(fcf_dev
);
2939 struct fcoe_ctlr
*ctlr
= fcoe_ctlr_device_priv(ctlr_dev
);
2940 struct fcoe_interface
*fcoe
= fcoe_ctlr_priv(ctlr
);
2942 fcf_dev
->vlan_id
= vlan_dev_vlan_id(fcoe
->netdev
);
2946 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2947 * @lport: the local port
2948 * @port_id: the port ID
2949 * @fp: the received frame, if any, that caused the port_id to be set.
2951 * This routine handles the case where we received a FLOGI and are
2952 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2953 * so it can set the non-mapped mode and gateway address.
2955 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2957 static void fcoe_set_port_id(struct fc_lport
*lport
,
2958 u32 port_id
, struct fc_frame
*fp
)
2960 struct fcoe_port
*port
= lport_priv(lport
);
2961 struct fcoe_interface
*fcoe
= port
->priv
;
2962 struct fcoe_ctlr
*ctlr
= fcoe_to_ctlr(fcoe
);
2964 if (fp
&& fc_frame_payload_op(fp
) == ELS_FLOGI
)
2965 fcoe_ctlr_recv_flogi(ctlr
, lport
, fp
);