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/version.h>
22 #include <linux/spinlock.h>
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/crc32.h>
29 #include <linux/slab.h>
30 #include <linux/cpu.h>
32 #include <linux/sysfs.h>
33 #include <linux/ctype.h>
34 #include <linux/workqueue.h>
35 #include <scsi/scsi_tcq.h>
36 #include <scsi/scsicam.h>
37 #include <scsi/scsi_transport.h>
38 #include <scsi/scsi_transport_fc.h>
39 #include <net/rtnetlink.h>
41 #include <scsi/fc/fc_encaps.h>
42 #include <scsi/fc/fc_fip.h>
44 #include <scsi/libfc.h>
45 #include <scsi/fc_frame.h>
46 #include <scsi/libfcoe.h>
50 MODULE_AUTHOR("Open-FCoE.org");
51 MODULE_DESCRIPTION("FCoE");
52 MODULE_LICENSE("GPL v2");
54 /* Performance tuning parameters for fcoe */
55 static unsigned int fcoe_ddp_min
;
56 module_param_named(ddp_min
, fcoe_ddp_min
, uint
, S_IRUGO
| S_IWUSR
);
57 MODULE_PARM_DESC(ddp_min
, "Minimum I/O size in bytes for " \
58 "Direct Data Placement (DDP).");
60 DEFINE_MUTEX(fcoe_config_mutex
);
62 static struct workqueue_struct
*fcoe_wq
;
64 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
65 static DECLARE_COMPLETION(fcoe_flush_completion
);
68 /* must only by accessed under the RTNL mutex */
69 LIST_HEAD(fcoe_hostlist
);
70 DEFINE_PER_CPU(struct fcoe_percpu_s
, fcoe_percpu
);
72 /* Function Prototypes */
73 static int fcoe_reset(struct Scsi_Host
*);
74 static int fcoe_xmit(struct fc_lport
*, struct fc_frame
*);
75 static int fcoe_rcv(struct sk_buff
*, struct net_device
*,
76 struct packet_type
*, struct net_device
*);
77 static int fcoe_percpu_receive_thread(void *);
78 static void fcoe_percpu_clean(struct fc_lport
*);
79 static int fcoe_link_speed_update(struct fc_lport
*);
80 static int fcoe_link_ok(struct fc_lport
*);
82 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*);
83 static int fcoe_hostlist_add(const struct fc_lport
*);
85 static int fcoe_device_notification(struct notifier_block
*, ulong
, void *);
86 static void fcoe_dev_setup(void);
87 static void fcoe_dev_cleanup(void);
88 static struct fcoe_interface
89 *fcoe_hostlist_lookup_port(const struct net_device
*);
91 static int fcoe_fip_recv(struct sk_buff
*, struct net_device
*,
92 struct packet_type
*, struct net_device
*);
94 static void fcoe_fip_send(struct fcoe_ctlr
*, struct sk_buff
*);
95 static void fcoe_update_src_mac(struct fc_lport
*, u8
*);
96 static u8
*fcoe_get_src_mac(struct fc_lport
*);
97 static void fcoe_destroy_work(struct work_struct
*);
99 static int fcoe_ddp_setup(struct fc_lport
*, u16
, struct scatterlist
*,
101 static int fcoe_ddp_done(struct fc_lport
*, u16
);
103 static int fcoe_cpu_callback(struct notifier_block
*, unsigned long, void *);
105 static bool fcoe_match(struct net_device
*netdev
);
106 static int fcoe_create(struct net_device
*netdev
, enum fip_state fip_mode
);
107 static int fcoe_destroy(struct net_device
*netdev
);
108 static int fcoe_enable(struct net_device
*netdev
);
109 static int fcoe_disable(struct net_device
*netdev
);
111 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*,
112 u32 did
, struct fc_frame
*,
114 void (*resp
)(struct fc_seq
*,
117 void *, u32 timeout
);
118 static void fcoe_recv_frame(struct sk_buff
*skb
);
120 static void fcoe_get_lesb(struct fc_lport
*, struct fc_els_lesb
*);
122 /* notification function for packets from net device */
123 static struct notifier_block fcoe_notifier
= {
124 .notifier_call
= fcoe_device_notification
,
127 /* notification function for CPU hotplug events */
128 static struct notifier_block fcoe_cpu_notifier
= {
129 .notifier_call
= fcoe_cpu_callback
,
132 static struct scsi_transport_template
*fcoe_nport_scsi_transport
;
133 static struct scsi_transport_template
*fcoe_vport_scsi_transport
;
135 static int fcoe_vport_destroy(struct fc_vport
*);
136 static int fcoe_vport_create(struct fc_vport
*, bool disabled
);
137 static int fcoe_vport_disable(struct fc_vport
*, bool disable
);
138 static void fcoe_set_vport_symbolic_name(struct fc_vport
*);
139 static void fcoe_set_port_id(struct fc_lport
*, u32
, struct fc_frame
*);
140 static int fcoe_validate_vport_create(struct fc_vport
*);
142 static struct libfc_function_template fcoe_libfc_fcn_templ
= {
143 .frame_send
= fcoe_xmit
,
144 .ddp_setup
= fcoe_ddp_setup
,
145 .ddp_done
= fcoe_ddp_done
,
146 .elsct_send
= fcoe_elsct_send
,
147 .get_lesb
= fcoe_get_lesb
,
148 .lport_set_port_id
= fcoe_set_port_id
,
151 struct fc_function_template fcoe_nport_fc_functions
= {
152 .show_host_node_name
= 1,
153 .show_host_port_name
= 1,
154 .show_host_supported_classes
= 1,
155 .show_host_supported_fc4s
= 1,
156 .show_host_active_fc4s
= 1,
157 .show_host_maxframe_size
= 1,
159 .show_host_port_id
= 1,
160 .show_host_supported_speeds
= 1,
161 .get_host_speed
= fc_get_host_speed
,
162 .show_host_speed
= 1,
163 .show_host_port_type
= 1,
164 .get_host_port_state
= fc_get_host_port_state
,
165 .show_host_port_state
= 1,
166 .show_host_symbolic_name
= 1,
168 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
169 .show_rport_maxframe_size
= 1,
170 .show_rport_supported_classes
= 1,
172 .show_host_fabric_name
= 1,
173 .show_starget_node_name
= 1,
174 .show_starget_port_name
= 1,
175 .show_starget_port_id
= 1,
176 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
177 .show_rport_dev_loss_tmo
= 1,
178 .get_fc_host_stats
= fc_get_host_stats
,
179 .issue_fc_host_lip
= fcoe_reset
,
181 .terminate_rport_io
= fc_rport_terminate_io
,
183 .vport_create
= fcoe_vport_create
,
184 .vport_delete
= fcoe_vport_destroy
,
185 .vport_disable
= fcoe_vport_disable
,
186 .set_vport_symbolic_name
= fcoe_set_vport_symbolic_name
,
188 .bsg_request
= fc_lport_bsg_request
,
191 struct fc_function_template fcoe_vport_fc_functions
= {
192 .show_host_node_name
= 1,
193 .show_host_port_name
= 1,
194 .show_host_supported_classes
= 1,
195 .show_host_supported_fc4s
= 1,
196 .show_host_active_fc4s
= 1,
197 .show_host_maxframe_size
= 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 .bsg_request
= fc_lport_bsg_request
,
226 static struct scsi_host_template fcoe_shost_template
= {
227 .module
= THIS_MODULE
,
228 .name
= "FCoE Driver",
229 .proc_name
= FCOE_NAME
,
230 .queuecommand
= fc_queuecommand
,
231 .eh_abort_handler
= fc_eh_abort
,
232 .eh_device_reset_handler
= fc_eh_device_reset
,
233 .eh_host_reset_handler
= fc_eh_host_reset
,
234 .slave_alloc
= fc_slave_alloc
,
235 .change_queue_depth
= fc_change_queue_depth
,
236 .change_queue_type
= fc_change_queue_type
,
239 .can_queue
= FCOE_MAX_OUTSTANDING_COMMANDS
,
240 .use_clustering
= ENABLE_CLUSTERING
,
241 .sg_tablesize
= SG_ALL
,
242 .max_sectors
= 0xffff,
246 * fcoe_interface_setup() - Setup a FCoE interface
247 * @fcoe: The new FCoE interface
248 * @netdev: The net device that the fcoe interface is on
250 * Returns : 0 for success
251 * Locking: must be called with the RTNL mutex held
253 static int fcoe_interface_setup(struct fcoe_interface
*fcoe
,
254 struct net_device
*netdev
)
256 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
257 struct netdev_hw_addr
*ha
;
258 struct net_device
*real_dev
;
259 u8 flogi_maddr
[ETH_ALEN
];
260 const struct net_device_ops
*ops
;
262 fcoe
->netdev
= netdev
;
264 /* Let LLD initialize for FCoE */
265 ops
= netdev
->netdev_ops
;
266 if (ops
->ndo_fcoe_enable
) {
267 if (ops
->ndo_fcoe_enable(netdev
))
268 FCOE_NETDEV_DBG(netdev
, "Failed to enable FCoE"
269 " specific feature for LLD.\n");
272 /* Do not support for bonding device */
273 if (netdev
->priv_flags
& IFF_BONDING
&& netdev
->flags
& IFF_MASTER
) {
274 FCOE_NETDEV_DBG(netdev
, "Bonded interfaces not supported\n");
278 /* look for SAN MAC address, if multiple SAN MACs exist, only
279 * use the first one for SPMA */
280 real_dev
= (netdev
->priv_flags
& IFF_802_1Q_VLAN
) ?
281 vlan_dev_real_dev(netdev
) : netdev
;
283 for_each_dev_addr(real_dev
, ha
) {
284 if ((ha
->type
== NETDEV_HW_ADDR_T_SAN
) &&
285 (is_valid_ether_addr(ha
->addr
))) {
286 memcpy(fip
->ctl_src_addr
, ha
->addr
, ETH_ALEN
);
293 /* setup Source Mac Address */
295 memcpy(fip
->ctl_src_addr
, netdev
->dev_addr
, netdev
->addr_len
);
298 * Add FCoE MAC address as second unicast MAC address
299 * or enter promiscuous mode if not capable of listening
300 * for multiple unicast MACs.
302 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
303 dev_uc_add(netdev
, flogi_maddr
);
305 dev_uc_add(netdev
, fip
->ctl_src_addr
);
306 if (fip
->mode
== FIP_MODE_VN2VN
) {
307 dev_mc_add(netdev
, FIP_ALL_VN2VN_MACS
);
308 dev_mc_add(netdev
, FIP_ALL_P2P_MACS
);
310 dev_mc_add(netdev
, FIP_ALL_ENODE_MACS
);
313 * setup the receive function from ethernet driver
314 * on the ethertype for the given device
316 fcoe
->fcoe_packet_type
.func
= fcoe_rcv
;
317 fcoe
->fcoe_packet_type
.type
= __constant_htons(ETH_P_FCOE
);
318 fcoe
->fcoe_packet_type
.dev
= netdev
;
319 dev_add_pack(&fcoe
->fcoe_packet_type
);
321 fcoe
->fip_packet_type
.func
= fcoe_fip_recv
;
322 fcoe
->fip_packet_type
.type
= htons(ETH_P_FIP
);
323 fcoe
->fip_packet_type
.dev
= netdev
;
324 dev_add_pack(&fcoe
->fip_packet_type
);
330 * fcoe_interface_create() - Create a FCoE interface on a net device
331 * @netdev: The net device to create the FCoE interface on
332 * @fip_mode: The mode to use for FIP
334 * Returns: pointer to a struct fcoe_interface or NULL on error
336 static struct fcoe_interface
*fcoe_interface_create(struct net_device
*netdev
,
337 enum fip_state fip_mode
)
339 struct fcoe_interface
*fcoe
;
342 if (!try_module_get(THIS_MODULE
)) {
343 FCOE_NETDEV_DBG(netdev
,
344 "Could not get a reference to the module\n");
345 fcoe
= ERR_PTR(-EBUSY
);
349 fcoe
= kzalloc(sizeof(*fcoe
), GFP_KERNEL
);
351 FCOE_NETDEV_DBG(netdev
, "Could not allocate fcoe structure\n");
352 fcoe
= ERR_PTR(-ENOMEM
);
357 kref_init(&fcoe
->kref
);
362 fcoe_ctlr_init(&fcoe
->ctlr
, fip_mode
);
363 fcoe
->ctlr
.send
= fcoe_fip_send
;
364 fcoe
->ctlr
.update_mac
= fcoe_update_src_mac
;
365 fcoe
->ctlr
.get_src_addr
= fcoe_get_src_mac
;
367 err
= fcoe_interface_setup(fcoe
, netdev
);
369 fcoe_ctlr_destroy(&fcoe
->ctlr
);
379 module_put(THIS_MODULE
);
385 * fcoe_interface_release() - fcoe_port kref release function
386 * @kref: Embedded reference count in an fcoe_interface struct
388 static void fcoe_interface_release(struct kref
*kref
)
390 struct fcoe_interface
*fcoe
;
391 struct net_device
*netdev
;
393 fcoe
= container_of(kref
, struct fcoe_interface
, kref
);
394 netdev
= fcoe
->netdev
;
395 /* tear-down the FCoE controller */
396 fcoe_ctlr_destroy(&fcoe
->ctlr
);
399 module_put(THIS_MODULE
);
403 * fcoe_interface_get() - Get a reference to a FCoE interface
404 * @fcoe: The FCoE interface to be held
406 static inline void fcoe_interface_get(struct fcoe_interface
*fcoe
)
408 kref_get(&fcoe
->kref
);
412 * fcoe_interface_put() - Put a reference to a FCoE interface
413 * @fcoe: The FCoE interface to be released
415 static inline void fcoe_interface_put(struct fcoe_interface
*fcoe
)
417 kref_put(&fcoe
->kref
, fcoe_interface_release
);
421 * fcoe_interface_cleanup() - Clean up a FCoE interface
422 * @fcoe: The FCoE interface to be cleaned up
424 * Caller must be holding the RTNL mutex
426 void fcoe_interface_cleanup(struct fcoe_interface
*fcoe
)
428 struct net_device
*netdev
= fcoe
->netdev
;
429 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
430 u8 flogi_maddr
[ETH_ALEN
];
431 const struct net_device_ops
*ops
;
432 struct fcoe_port
*port
= lport_priv(fcoe
->ctlr
.lp
);
434 FCOE_NETDEV_DBG(netdev
, "Destroying interface\n");
436 /* Logout of the fabric */
437 fc_fabric_logoff(fcoe
->ctlr
.lp
);
439 /* Cleanup the fc_lport */
440 fc_lport_destroy(fcoe
->ctlr
.lp
);
442 /* Stop the transmit retry timer */
443 del_timer_sync(&port
->timer
);
445 /* Free existing transmit skbs */
446 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
449 * Don't listen for Ethernet packets anymore.
450 * synchronize_net() ensures that the packet handlers are not running
451 * on another CPU. dev_remove_pack() would do that, this calls the
452 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
454 __dev_remove_pack(&fcoe
->fcoe_packet_type
);
455 __dev_remove_pack(&fcoe
->fip_packet_type
);
458 /* Delete secondary MAC addresses */
459 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
460 dev_uc_del(netdev
, flogi_maddr
);
462 dev_uc_del(netdev
, fip
->ctl_src_addr
);
463 if (fip
->mode
== FIP_MODE_VN2VN
) {
464 dev_mc_del(netdev
, FIP_ALL_VN2VN_MACS
);
465 dev_mc_del(netdev
, FIP_ALL_P2P_MACS
);
467 dev_mc_del(netdev
, FIP_ALL_ENODE_MACS
);
469 if (!is_zero_ether_addr(port
->data_src_addr
))
470 dev_uc_del(netdev
, port
->data_src_addr
);
472 /* Tell the LLD we are done w/ FCoE */
473 ops
= netdev
->netdev_ops
;
474 if (ops
->ndo_fcoe_disable
) {
475 if (ops
->ndo_fcoe_disable(netdev
))
476 FCOE_NETDEV_DBG(netdev
, "Failed to disable FCoE"
477 " specific feature for LLD.\n");
479 fcoe_interface_put(fcoe
);
483 * fcoe_fip_recv() - Handler for received FIP frames
484 * @skb: The receive skb
485 * @netdev: The associated net device
486 * @ptype: The packet_type structure which was used to register this handler
487 * @orig_dev: The original net_device the the skb was received on.
488 * (in case dev is a bond)
490 * Returns: 0 for success
492 static int fcoe_fip_recv(struct sk_buff
*skb
, struct net_device
*netdev
,
493 struct packet_type
*ptype
,
494 struct net_device
*orig_dev
)
496 struct fcoe_interface
*fcoe
;
498 fcoe
= container_of(ptype
, struct fcoe_interface
, fip_packet_type
);
499 fcoe_ctlr_recv(&fcoe
->ctlr
, skb
);
504 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
505 * @fip: The FCoE controller
506 * @skb: The FIP packet to be sent
508 static void fcoe_fip_send(struct fcoe_ctlr
*fip
, struct sk_buff
*skb
)
510 skb
->dev
= fcoe_from_ctlr(fip
)->netdev
;
515 * fcoe_update_src_mac() - Update the Ethernet MAC filters
516 * @lport: The local port to update the source MAC on
517 * @addr: Unicast MAC address to add
519 * Remove any previously-set unicast MAC filter.
520 * Add secondary FCoE MAC address filter for our OUI.
522 static void fcoe_update_src_mac(struct fc_lport
*lport
, u8
*addr
)
524 struct fcoe_port
*port
= lport_priv(lport
);
525 struct fcoe_interface
*fcoe
= port
->priv
;
528 if (!is_zero_ether_addr(port
->data_src_addr
))
529 dev_uc_del(fcoe
->netdev
, port
->data_src_addr
);
530 if (!is_zero_ether_addr(addr
))
531 dev_uc_add(fcoe
->netdev
, addr
);
532 memcpy(port
->data_src_addr
, addr
, ETH_ALEN
);
537 * fcoe_get_src_mac() - return the Ethernet source address for an lport
538 * @lport: libfc lport
540 static u8
*fcoe_get_src_mac(struct fc_lport
*lport
)
542 struct fcoe_port
*port
= lport_priv(lport
);
544 return port
->data_src_addr
;
548 * fcoe_lport_config() - Set up a local port
549 * @lport: The local port to be setup
551 * Returns: 0 for success
553 static int fcoe_lport_config(struct fc_lport
*lport
)
557 lport
->max_retry_count
= 3;
558 lport
->max_rport_retry_count
= 3;
559 lport
->e_d_tov
= 2 * 1000; /* FC-FS default */
560 lport
->r_a_tov
= 2 * 2 * 1000;
561 lport
->service_params
= (FCP_SPPF_INIT_FCN
| FCP_SPPF_RD_XRDY_DIS
|
562 FCP_SPPF_RETRY
| FCP_SPPF_CONF_COMPL
);
563 lport
->does_npiv
= 1;
565 fc_lport_init_stats(lport
);
567 /* lport fc_lport related configuration */
568 fc_lport_config(lport
);
570 /* offload related configuration */
571 lport
->crc_offload
= 0;
572 lport
->seq_offload
= 0;
573 lport
->lro_enabled
= 0;
581 * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
582 * @netdev: the associated net device
583 * @wwn: the output WWN
584 * @type: the type of WWN (WWPN or WWNN)
586 * Returns: 0 for success
588 static int fcoe_get_wwn(struct net_device
*netdev
, u64
*wwn
, int type
)
590 const struct net_device_ops
*ops
= netdev
->netdev_ops
;
592 if (ops
->ndo_fcoe_get_wwn
)
593 return ops
->ndo_fcoe_get_wwn(netdev
, wwn
, type
);
598 * fcoe_netdev_features_change - Updates the lport's offload flags based
599 * on the LLD netdev's FCoE feature flags
601 static void fcoe_netdev_features_change(struct fc_lport
*lport
,
602 struct net_device
*netdev
)
604 mutex_lock(&lport
->lp_mutex
);
606 if (netdev
->features
& NETIF_F_SG
)
611 if (netdev
->features
& NETIF_F_FCOE_CRC
) {
612 lport
->crc_offload
= 1;
613 FCOE_NETDEV_DBG(netdev
, "Supports FCCRC offload\n");
615 lport
->crc_offload
= 0;
618 if (netdev
->features
& NETIF_F_FSO
) {
619 lport
->seq_offload
= 1;
620 lport
->lso_max
= netdev
->gso_max_size
;
621 FCOE_NETDEV_DBG(netdev
, "Supports LSO for max len 0x%x\n",
624 lport
->seq_offload
= 0;
628 if (netdev
->fcoe_ddp_xid
) {
629 lport
->lro_enabled
= 1;
630 lport
->lro_xid
= netdev
->fcoe_ddp_xid
;
631 FCOE_NETDEV_DBG(netdev
, "Supports LRO for max xid 0x%x\n",
634 lport
->lro_enabled
= 0;
638 mutex_unlock(&lport
->lp_mutex
);
642 * fcoe_netdev_config() - Set up net devive for SW FCoE
643 * @lport: The local port that is associated with the net device
644 * @netdev: The associated net device
646 * Must be called after fcoe_lport_config() as it will use local port mutex
648 * Returns: 0 for success
650 static int fcoe_netdev_config(struct fc_lport
*lport
, struct net_device
*netdev
)
654 struct fcoe_interface
*fcoe
;
655 struct fcoe_port
*port
;
657 /* Setup lport private data to point to fcoe softc */
658 port
= lport_priv(lport
);
662 * Determine max frame size based on underlying device and optional
663 * user-configured limit. If the MFS is too low, fcoe_link_ok()
664 * will return 0, so do this first.
667 if (netdev
->features
& NETIF_F_FCOE_MTU
) {
669 FCOE_NETDEV_DBG(netdev
, "Supports FCOE_MTU of %d bytes\n", mfs
);
671 mfs
-= (sizeof(struct fcoe_hdr
) + sizeof(struct fcoe_crc_eof
));
672 if (fc_set_mfs(lport
, mfs
))
675 /* offload features support */
676 fcoe_netdev_features_change(lport
, netdev
);
678 skb_queue_head_init(&port
->fcoe_pending_queue
);
679 port
->fcoe_pending_queue_active
= 0;
680 setup_timer(&port
->timer
, fcoe_queue_timer
, (unsigned long)lport
);
682 fcoe_link_speed_update(lport
);
685 if (fcoe_get_wwn(netdev
, &wwnn
, NETDEV_FCOE_WWNN
))
686 wwnn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
, 1, 0);
687 fc_set_wwnn(lport
, wwnn
);
688 if (fcoe_get_wwn(netdev
, &wwpn
, NETDEV_FCOE_WWPN
))
689 wwpn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
,
691 fc_set_wwpn(lport
, wwpn
);
698 * fcoe_shost_config() - Set up the SCSI host associated with a local port
699 * @lport: The local port
700 * @dev: The device associated with the SCSI host
702 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
704 * Returns: 0 for success
706 static int fcoe_shost_config(struct fc_lport
*lport
, struct device
*dev
)
710 /* lport scsi host config */
711 lport
->host
->max_lun
= FCOE_MAX_LUN
;
712 lport
->host
->max_id
= FCOE_MAX_FCP_TARGET
;
713 lport
->host
->max_channel
= 0;
714 lport
->host
->max_cmd_len
= FCOE_MAX_CMD_LEN
;
717 lport
->host
->transportt
= fcoe_vport_scsi_transport
;
719 lport
->host
->transportt
= fcoe_nport_scsi_transport
;
721 /* add the new host to the SCSI-ml */
722 rc
= scsi_add_host(lport
->host
, dev
);
724 FCOE_NETDEV_DBG(fcoe_netdev(lport
), "fcoe_shost_config: "
725 "error on scsi_add_host\n");
730 fc_host_max_npiv_vports(lport
->host
) = USHRT_MAX
;
732 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
733 "%s v%s over %s", FCOE_NAME
, FCOE_VERSION
,
734 fcoe_netdev(lport
)->name
);
740 * fcoe_oem_match() - The match routine for the offloaded exchange manager
743 * This routine will be associated with an exchange manager (EM). When
744 * the libfc exchange handling code is looking for an EM to use it will
745 * call this routine and pass it the frame that it wishes to send. This
746 * routine will return True if the associated EM is to be used and False
747 * if the echange code should continue looking for an EM.
749 * The offload EM that this routine is associated with will handle any
750 * packets that are for SCSI read requests.
752 * This has been enhanced to work when FCoE stack is operating in target
755 * Returns: True for read types I/O, otherwise returns false.
757 bool fcoe_oem_match(struct fc_frame
*fp
)
759 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
760 struct fcp_cmnd
*fcp
;
762 if (fc_fcp_is_read(fr_fsp(fp
)) &&
763 (fr_fsp(fp
)->data_len
> fcoe_ddp_min
))
765 else if (!(ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)) {
766 fcp
= fc_frame_payload_get(fp
, sizeof(*fcp
));
767 if (ntohs(fh
->fh_rx_id
) == FC_XID_UNKNOWN
&&
768 fcp
&& (ntohl(fcp
->fc_dl
) > fcoe_ddp_min
) &&
769 (fcp
->fc_flags
& FCP_CFL_WRDATA
))
776 * fcoe_em_config() - Allocate and configure an exchange manager
777 * @lport: The local port that the new EM will be associated with
779 * Returns: 0 on success
781 static inline int fcoe_em_config(struct fc_lport
*lport
)
783 struct fcoe_port
*port
= lport_priv(lport
);
784 struct fcoe_interface
*fcoe
= port
->priv
;
785 struct fcoe_interface
*oldfcoe
= NULL
;
786 struct net_device
*old_real_dev
, *cur_real_dev
;
787 u16 min_xid
= FCOE_MIN_XID
;
788 u16 max_xid
= FCOE_MAX_XID
;
791 * Check if need to allocate an em instance for
792 * offload exchange ids to be shared across all VN_PORTs/lport.
794 if (!lport
->lro_enabled
|| !lport
->lro_xid
||
795 (lport
->lro_xid
>= max_xid
)) {
801 * Reuse existing offload em instance in case
802 * it is already allocated on real eth device
804 if (fcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
805 cur_real_dev
= vlan_dev_real_dev(fcoe
->netdev
);
807 cur_real_dev
= fcoe
->netdev
;
809 list_for_each_entry(oldfcoe
, &fcoe_hostlist
, list
) {
810 if (oldfcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
811 old_real_dev
= vlan_dev_real_dev(oldfcoe
->netdev
);
813 old_real_dev
= oldfcoe
->netdev
;
815 if (cur_real_dev
== old_real_dev
) {
816 fcoe
->oem
= oldfcoe
->oem
;
822 if (!fc_exch_mgr_add(lport
, fcoe
->oem
, fcoe_oem_match
)) {
823 printk(KERN_ERR
"fcoe_em_config: failed to add "
824 "offload em:%p on interface:%s\n",
825 fcoe
->oem
, fcoe
->netdev
->name
);
829 fcoe
->oem
= fc_exch_mgr_alloc(lport
, FC_CLASS_3
,
830 FCOE_MIN_XID
, lport
->lro_xid
,
833 printk(KERN_ERR
"fcoe_em_config: failed to allocate "
834 "em for offload exches on interface:%s\n",
841 * Exclude offload EM xid range from next EM xid range.
843 min_xid
+= lport
->lro_xid
+ 1;
846 if (!fc_exch_mgr_alloc(lport
, FC_CLASS_3
, min_xid
, max_xid
, NULL
)) {
847 printk(KERN_ERR
"fcoe_em_config: failed to "
848 "allocate em on interface %s\n", fcoe
->netdev
->name
);
856 * fcoe_if_destroy() - Tear down a SW FCoE instance
857 * @lport: The local port to be destroyed
860 static void fcoe_if_destroy(struct fc_lport
*lport
)
862 /* Free queued packets for the per-CPU receive threads */
863 fcoe_percpu_clean(lport
);
865 /* Detach from the scsi-ml */
866 fc_remove_host(lport
->host
);
867 scsi_remove_host(lport
->host
);
869 /* Destroy lport scsi_priv */
870 fc_fcp_destroy(lport
);
872 /* There are no more rports or I/O, free the EM */
873 fc_exch_mgr_free(lport
);
875 /* Free memory used by statistical counters */
876 fc_lport_free_stats(lport
);
878 /* Release the Scsi_Host */
879 scsi_host_put(lport
->host
);
883 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
884 * @lport: The local port to setup DDP for
885 * @xid: The exchange ID for this DDP transfer
886 * @sgl: The scatterlist describing this transfer
887 * @sgc: The number of sg items
889 * Returns: 0 if the DDP context was not configured
891 static int fcoe_ddp_setup(struct fc_lport
*lport
, u16 xid
,
892 struct scatterlist
*sgl
, unsigned int sgc
)
894 struct net_device
*netdev
= fcoe_netdev(lport
);
896 if (netdev
->netdev_ops
->ndo_fcoe_ddp_setup
)
897 return netdev
->netdev_ops
->ndo_fcoe_ddp_setup(netdev
,
905 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
906 * @lport: The local port to complete DDP on
907 * @xid: The exchange ID for this DDP transfer
909 * Returns: the length of data that have been completed by DDP
911 static int fcoe_ddp_done(struct fc_lport
*lport
, u16 xid
)
913 struct net_device
*netdev
= fcoe_netdev(lport
);
915 if (netdev
->netdev_ops
->ndo_fcoe_ddp_done
)
916 return netdev
->netdev_ops
->ndo_fcoe_ddp_done(netdev
, xid
);
921 * fcoe_if_create() - Create a FCoE instance on an interface
922 * @fcoe: The FCoE interface to create a local port on
923 * @parent: The device pointer to be the parent in sysfs for the SCSI host
924 * @npiv: Indicates if the port is a vport or not
926 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
928 * Returns: The allocated fc_lport or an error pointer
930 static struct fc_lport
*fcoe_if_create(struct fcoe_interface
*fcoe
,
931 struct device
*parent
, int npiv
)
933 struct net_device
*netdev
= fcoe
->netdev
;
934 struct fc_lport
*lport
, *n_port
;
935 struct fcoe_port
*port
;
936 struct Scsi_Host
*shost
;
939 * parent is only a vport if npiv is 1,
940 * but we'll only use vport in that case so go ahead and set it
942 struct fc_vport
*vport
= dev_to_vport(parent
);
944 FCOE_NETDEV_DBG(netdev
, "Create Interface\n");
947 lport
= libfc_host_alloc(&fcoe_shost_template
, sizeof(*port
));
949 lport
= libfc_vport_create(vport
, sizeof(*port
));
952 FCOE_NETDEV_DBG(netdev
, "Could not allocate host structure\n");
956 port
= lport_priv(lport
);
959 port
->max_queue_depth
= FCOE_MAX_QUEUE_DEPTH
;
960 port
->min_queue_depth
= FCOE_MIN_QUEUE_DEPTH
;
961 INIT_WORK(&port
->destroy_work
, fcoe_destroy_work
);
963 /* configure a fc_lport including the exchange manager */
964 rc
= fcoe_lport_config(lport
);
966 FCOE_NETDEV_DBG(netdev
, "Could not configure lport for the "
972 FCOE_NETDEV_DBG(netdev
, "Setting vport names, "
973 "%16.16llx %16.16llx\n",
974 vport
->node_name
, vport
->port_name
);
975 fc_set_wwnn(lport
, vport
->node_name
);
976 fc_set_wwpn(lport
, vport
->port_name
);
979 /* configure lport network properties */
980 rc
= fcoe_netdev_config(lport
, netdev
);
982 FCOE_NETDEV_DBG(netdev
, "Could not configure netdev for the "
987 /* configure lport scsi host properties */
988 rc
= fcoe_shost_config(lport
, parent
);
990 FCOE_NETDEV_DBG(netdev
, "Could not configure shost for the "
995 /* Initialize the library */
996 rc
= fcoe_libfc_config(lport
, &fcoe
->ctlr
, &fcoe_libfc_fcn_templ
, 1);
998 FCOE_NETDEV_DBG(netdev
, "Could not configure libfc for the "
1000 goto out_lp_destroy
;
1004 * fcoe_em_alloc() and fcoe_hostlist_add() both
1005 * need to be atomic with respect to other changes to the
1006 * hostlist since fcoe_em_alloc() looks for an existing EM
1007 * instance on host list updated by fcoe_hostlist_add().
1009 * This is currently handled through the fcoe_config_mutex
1013 /* lport exch manager allocation */
1014 rc
= fcoe_em_config(lport
);
1016 shost
= vport_to_shost(vport
);
1017 n_port
= shost_priv(shost
);
1018 rc
= fc_exch_mgr_list_clone(n_port
, lport
);
1022 FCOE_NETDEV_DBG(netdev
, "Could not configure the EM\n");
1023 goto out_lp_destroy
;
1026 fcoe_interface_get(fcoe
);
1030 fc_exch_mgr_free(lport
);
1032 scsi_host_put(lport
->host
);
1038 * fcoe_if_init() - Initialization routine for fcoe.ko
1040 * Attaches the SW FCoE transport to the FC transport
1042 * Returns: 0 on success
1044 static int __init
fcoe_if_init(void)
1046 /* attach to scsi transport */
1047 fcoe_nport_scsi_transport
=
1048 fc_attach_transport(&fcoe_nport_fc_functions
);
1049 fcoe_vport_scsi_transport
=
1050 fc_attach_transport(&fcoe_vport_fc_functions
);
1052 if (!fcoe_nport_scsi_transport
) {
1053 printk(KERN_ERR
"fcoe: Failed to attach to the FC transport\n");
1061 * fcoe_if_exit() - Tear down fcoe.ko
1063 * Detaches the SW FCoE transport from the FC transport
1065 * Returns: 0 on success
1067 int __exit
fcoe_if_exit(void)
1069 fc_release_transport(fcoe_nport_scsi_transport
);
1070 fc_release_transport(fcoe_vport_scsi_transport
);
1071 fcoe_nport_scsi_transport
= NULL
;
1072 fcoe_vport_scsi_transport
= NULL
;
1077 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1078 * @cpu: The CPU index of the CPU to create a receive thread for
1080 static void fcoe_percpu_thread_create(unsigned int cpu
)
1082 struct fcoe_percpu_s
*p
;
1083 struct task_struct
*thread
;
1085 p
= &per_cpu(fcoe_percpu
, cpu
);
1087 thread
= kthread_create(fcoe_percpu_receive_thread
,
1088 (void *)p
, "fcoethread/%d", cpu
);
1090 if (likely(!IS_ERR(thread
))) {
1091 kthread_bind(thread
, cpu
);
1092 wake_up_process(thread
);
1094 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1096 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1101 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1102 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1104 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1105 * current CPU's Rx thread. If the thread being destroyed is bound to
1106 * the CPU processing this context the skbs will be freed.
1108 static void fcoe_percpu_thread_destroy(unsigned int cpu
)
1110 struct fcoe_percpu_s
*p
;
1111 struct task_struct
*thread
;
1112 struct page
*crc_eof
;
1113 struct sk_buff
*skb
;
1115 struct fcoe_percpu_s
*p0
;
1116 unsigned targ_cpu
= get_cpu();
1117 #endif /* CONFIG_SMP */
1119 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu
);
1121 /* Prevent any new skbs from being queued for this CPU. */
1122 p
= &per_cpu(fcoe_percpu
, cpu
);
1123 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1126 crc_eof
= p
->crc_eof_page
;
1127 p
->crc_eof_page
= NULL
;
1128 p
->crc_eof_offset
= 0;
1129 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1133 * Don't bother moving the skb's if this context is running
1134 * on the same CPU that is having its thread destroyed. This
1135 * can easily happen when the module is removed.
1137 if (cpu
!= targ_cpu
) {
1138 p0
= &per_cpu(fcoe_percpu
, targ_cpu
);
1139 spin_lock_bh(&p0
->fcoe_rx_list
.lock
);
1141 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1144 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1145 __skb_queue_tail(&p0
->fcoe_rx_list
, skb
);
1146 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1149 * The targeted CPU is not initialized and cannot accept
1150 * new skbs. Unlock the targeted CPU and drop the skbs
1151 * on the CPU that is going offline.
1153 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1155 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1159 * This scenario occurs when the module is being removed
1160 * and all threads are being destroyed. skbs will continue
1161 * to be shifted from the CPU thread that is being removed
1162 * to the CPU thread associated with the CPU that is processing
1163 * the module removal. Once there is only one CPU Rx thread it
1164 * will reach this case and we will drop all skbs and later
1167 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1168 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1170 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1175 * This a non-SMP scenario where the singular Rx thread is
1176 * being removed. Free all skbs and stop the thread.
1178 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1179 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1181 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1185 kthread_stop(thread
);
1192 * fcoe_cpu_callback() - Handler for CPU hotplug events
1193 * @nfb: The callback data block
1194 * @action: The event triggering the callback
1195 * @hcpu: The index of the CPU that the event is for
1197 * This creates or destroys per-CPU data for fcoe
1199 * Returns NOTIFY_OK always.
1201 static int fcoe_cpu_callback(struct notifier_block
*nfb
,
1202 unsigned long action
, void *hcpu
)
1204 unsigned cpu
= (unsigned long)hcpu
;
1208 case CPU_ONLINE_FROZEN
:
1209 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu
);
1210 fcoe_percpu_thread_create(cpu
);
1213 case CPU_DEAD_FROZEN
:
1214 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu
);
1215 fcoe_percpu_thread_destroy(cpu
);
1224 * fcoe_rcv() - Receive packets from a net device
1225 * @skb: The received packet
1226 * @netdev: The net device that the packet was received on
1227 * @ptype: The packet type context
1228 * @olddev: The last device net device
1230 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1231 * FC frame and passes the frame to libfc.
1233 * Returns: 0 for success
1235 int fcoe_rcv(struct sk_buff
*skb
, struct net_device
*netdev
,
1236 struct packet_type
*ptype
, struct net_device
*olddev
)
1238 struct fc_lport
*lport
;
1239 struct fcoe_rcv_info
*fr
;
1240 struct fcoe_interface
*fcoe
;
1241 struct fc_frame_header
*fh
;
1242 struct fcoe_percpu_s
*fps
;
1246 fcoe
= container_of(ptype
, struct fcoe_interface
, fcoe_packet_type
);
1247 lport
= fcoe
->ctlr
.lp
;
1248 if (unlikely(!lport
)) {
1249 FCOE_NETDEV_DBG(netdev
, "Cannot find hba structure");
1252 if (!lport
->link_up
)
1255 FCOE_NETDEV_DBG(netdev
, "skb_info: len:%d data_len:%d head:%p "
1256 "data:%p tail:%p end:%p sum:%d dev:%s",
1257 skb
->len
, skb
->data_len
, skb
->head
, skb
->data
,
1258 skb_tail_pointer(skb
), skb_end_pointer(skb
),
1259 skb
->csum
, skb
->dev
? skb
->dev
->name
: "<NULL>");
1263 if (is_fip_mode(&fcoe
->ctlr
) &&
1264 compare_ether_addr(eh
->h_source
, fcoe
->ctlr
.dest_addr
)) {
1265 FCOE_NETDEV_DBG(netdev
, "wrong source mac address:%pM\n",
1271 * Check for minimum frame length, and make sure required FCoE
1272 * and FC headers are pulled into the linear data area.
1274 if (unlikely((skb
->len
< FCOE_MIN_FRAME
) ||
1275 !pskb_may_pull(skb
, FCOE_HEADER_LEN
)))
1278 skb_set_transport_header(skb
, sizeof(struct fcoe_hdr
));
1279 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1281 if (ntoh24(&eh
->h_dest
[3]) != ntoh24(fh
->fh_d_id
)) {
1282 FCOE_NETDEV_DBG(netdev
, "FC frame d_id mismatch with MAC:%pM\n",
1287 fr
= fcoe_dev_from_skb(skb
);
1292 * In case the incoming frame's exchange is originated from
1293 * the initiator, then received frame's exchange id is ANDed
1294 * with fc_cpu_mask bits to get the same cpu on which exchange
1295 * was originated, otherwise just use the current cpu.
1297 if (ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)
1298 cpu
= ntohs(fh
->fh_ox_id
) & fc_cpu_mask
;
1300 cpu
= smp_processor_id();
1302 fps
= &per_cpu(fcoe_percpu
, cpu
);
1303 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1304 if (unlikely(!fps
->thread
)) {
1306 * The targeted CPU is not ready, let's target
1307 * the first CPU now. For non-SMP systems this
1308 * will check the same CPU twice.
1310 FCOE_NETDEV_DBG(netdev
, "CPU is online, but no receive thread "
1311 "ready for incoming skb- using first online "
1314 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1315 cpu
= cpumask_first(cpu_online_mask
);
1316 fps
= &per_cpu(fcoe_percpu
, cpu
);
1317 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1319 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1325 * We now have a valid CPU that we're targeting for
1326 * this skb. We also have this receive thread locked,
1327 * so we're free to queue skbs into it's queue.
1330 /* If this is a SCSI-FCP frame, and this is already executing on the
1331 * correct CPU, and the queue for this CPU is empty, then go ahead
1332 * and process the frame directly in the softirq context.
1333 * This lets us process completions without context switching from the
1334 * NET_RX softirq, to our receive processing thread, and then back to
1335 * BLOCK softirq context.
1337 if (fh
->fh_type
== FC_TYPE_FCP
&&
1338 cpu
== smp_processor_id() &&
1339 skb_queue_empty(&fps
->fcoe_rx_list
)) {
1340 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1341 fcoe_recv_frame(skb
);
1343 __skb_queue_tail(&fps
->fcoe_rx_list
, skb
);
1344 if (fps
->fcoe_rx_list
.qlen
== 1)
1345 wake_up_process(fps
->thread
);
1346 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1351 per_cpu_ptr(lport
->dev_stats
, get_cpu())->ErrorFrames
++;
1359 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1360 * @skb: The packet to be transmitted
1361 * @tlen: The total length of the trailer
1363 * Returns: 0 for success
1365 static int fcoe_alloc_paged_crc_eof(struct sk_buff
*skb
, int tlen
)
1367 struct fcoe_percpu_s
*fps
;
1370 fps
= &get_cpu_var(fcoe_percpu
);
1371 rc
= fcoe_get_paged_crc_eof(skb
, tlen
, fps
);
1372 put_cpu_var(fcoe_percpu
);
1378 * fcoe_xmit() - Transmit a FCoE frame
1379 * @lport: The local port that the frame is to be transmitted for
1380 * @fp: The frame to be transmitted
1382 * Return: 0 for success
1384 int fcoe_xmit(struct fc_lport
*lport
, struct fc_frame
*fp
)
1389 struct fcoe_crc_eof
*cp
;
1390 struct sk_buff
*skb
;
1391 struct fcoe_dev_stats
*stats
;
1392 struct fc_frame_header
*fh
;
1393 unsigned int hlen
; /* header length implies the version */
1394 unsigned int tlen
; /* trailer length */
1395 unsigned int elen
; /* eth header, may include vlan */
1396 struct fcoe_port
*port
= lport_priv(lport
);
1397 struct fcoe_interface
*fcoe
= port
->priv
;
1399 struct fcoe_hdr
*hp
;
1401 WARN_ON((fr_len(fp
) % sizeof(u32
)) != 0);
1403 fh
= fc_frame_header_get(fp
);
1405 wlen
= skb
->len
/ FCOE_WORD_TO_BYTE
;
1407 if (!lport
->link_up
) {
1412 if (unlikely(fh
->fh_type
== FC_TYPE_ELS
) &&
1413 fcoe_ctlr_els_send(&fcoe
->ctlr
, lport
, skb
))
1419 elen
= sizeof(struct ethhdr
);
1420 hlen
= sizeof(struct fcoe_hdr
);
1421 tlen
= sizeof(struct fcoe_crc_eof
);
1422 wlen
= (skb
->len
- tlen
+ sizeof(crc
)) / FCOE_WORD_TO_BYTE
;
1425 if (likely(lport
->crc_offload
)) {
1426 skb
->ip_summed
= CHECKSUM_PARTIAL
;
1427 skb
->csum_start
= skb_headroom(skb
);
1428 skb
->csum_offset
= skb
->len
;
1431 skb
->ip_summed
= CHECKSUM_NONE
;
1432 crc
= fcoe_fc_crc(fp
);
1435 /* copy port crc and eof to the skb buff */
1436 if (skb_is_nonlinear(skb
)) {
1438 if (fcoe_alloc_paged_crc_eof(skb
, tlen
)) {
1442 frag
= &skb_shinfo(skb
)->frags
[skb_shinfo(skb
)->nr_frags
- 1];
1443 cp
= kmap_atomic(frag
->page
, KM_SKB_DATA_SOFTIRQ
)
1444 + frag
->page_offset
;
1446 cp
= (struct fcoe_crc_eof
*)skb_put(skb
, tlen
);
1449 memset(cp
, 0, sizeof(*cp
));
1451 cp
->fcoe_crc32
= cpu_to_le32(~crc
);
1453 if (skb_is_nonlinear(skb
)) {
1454 kunmap_atomic(cp
, KM_SKB_DATA_SOFTIRQ
);
1458 /* adjust skb network/transport offsets to match mac/fcoe/port */
1459 skb_push(skb
, elen
+ hlen
);
1460 skb_reset_mac_header(skb
);
1461 skb_reset_network_header(skb
);
1462 skb
->mac_len
= elen
;
1463 skb
->protocol
= htons(ETH_P_FCOE
);
1464 skb
->dev
= fcoe
->netdev
;
1466 /* fill up mac and fcoe headers */
1468 eh
->h_proto
= htons(ETH_P_FCOE
);
1469 memcpy(eh
->h_dest
, fcoe
->ctlr
.dest_addr
, ETH_ALEN
);
1470 if (fcoe
->ctlr
.map_dest
)
1471 memcpy(eh
->h_dest
+ 3, fh
->fh_d_id
, 3);
1473 if (unlikely(fcoe
->ctlr
.flogi_oxid
!= FC_XID_UNKNOWN
))
1474 memcpy(eh
->h_source
, fcoe
->ctlr
.ctl_src_addr
, ETH_ALEN
);
1476 memcpy(eh
->h_source
, port
->data_src_addr
, ETH_ALEN
);
1478 hp
= (struct fcoe_hdr
*)(eh
+ 1);
1479 memset(hp
, 0, sizeof(*hp
));
1481 FC_FCOE_ENCAPS_VER(hp
, FC_FCOE_VER
);
1484 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1485 if (lport
->seq_offload
&& fr_max_payload(fp
)) {
1486 skb_shinfo(skb
)->gso_type
= SKB_GSO_FCOE
;
1487 skb_shinfo(skb
)->gso_size
= fr_max_payload(fp
);
1489 skb_shinfo(skb
)->gso_type
= 0;
1490 skb_shinfo(skb
)->gso_size
= 0;
1492 /* update tx stats: regardless if LLD fails */
1493 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1495 stats
->TxWords
+= wlen
;
1498 /* send down to lld */
1500 if (port
->fcoe_pending_queue
.qlen
)
1501 fcoe_check_wait_queue(lport
, skb
);
1502 else if (fcoe_start_io(skb
))
1503 fcoe_check_wait_queue(lport
, skb
);
1509 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1510 * @skb: The completed skb (argument required by destructor)
1512 static void fcoe_percpu_flush_done(struct sk_buff
*skb
)
1514 complete(&fcoe_flush_completion
);
1518 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1519 * @lport: The local port the frame was received on
1520 * @fp: The received frame
1522 * Return: 0 on passing filtering checks
1524 static inline int fcoe_filter_frames(struct fc_lport
*lport
,
1525 struct fc_frame
*fp
)
1527 struct fcoe_interface
*fcoe
;
1528 struct fc_frame_header
*fh
;
1529 struct sk_buff
*skb
= (struct sk_buff
*)fp
;
1530 struct fcoe_dev_stats
*stats
;
1533 * We only check CRC if no offload is available and if it is
1534 * it's solicited data, in which case, the FCP layer would
1535 * check it during the copy.
1537 if (lport
->crc_offload
&& skb
->ip_summed
== CHECKSUM_UNNECESSARY
)
1538 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1540 fr_flags(fp
) |= FCPHF_CRC_UNCHECKED
;
1542 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1543 fh
= fc_frame_header_get(fp
);
1544 if (fh
->fh_r_ctl
== FC_RCTL_DD_SOL_DATA
&& fh
->fh_type
== FC_TYPE_FCP
)
1547 fcoe
= ((struct fcoe_port
*)lport_priv(lport
))->priv
;
1548 if (is_fip_mode(&fcoe
->ctlr
) && fc_frame_payload_op(fp
) == ELS_LOGO
&&
1549 ntoh24(fh
->fh_s_id
) == FC_FID_FLOGI
) {
1550 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1554 if (!(fr_flags(fp
) & FCPHF_CRC_UNCHECKED
) ||
1555 le32_to_cpu(fr_crc(fp
)) == ~crc32(~0, skb
->data
, skb
->len
)) {
1556 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1560 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1561 stats
->InvalidCRCCount
++;
1562 if (stats
->InvalidCRCCount
< 5)
1563 printk(KERN_WARNING
"fcoe: dropping frame with CRC error\n");
1569 * fcoe_recv_frame() - process a single received frame
1570 * @skb: frame to process
1572 static void fcoe_recv_frame(struct sk_buff
*skb
)
1575 struct fc_lport
*lport
;
1576 struct fcoe_rcv_info
*fr
;
1577 struct fcoe_dev_stats
*stats
;
1578 struct fcoe_crc_eof crc_eof
;
1579 struct fc_frame
*fp
;
1580 struct fcoe_port
*port
;
1581 struct fcoe_hdr
*hp
;
1583 fr
= fcoe_dev_from_skb(skb
);
1585 if (unlikely(!lport
)) {
1586 if (skb
->destructor
!= fcoe_percpu_flush_done
)
1587 FCOE_NETDEV_DBG(skb
->dev
, "NULL lport in skb");
1592 FCOE_NETDEV_DBG(skb
->dev
, "skb_info: len:%d data_len:%d "
1593 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1594 skb
->len
, skb
->data_len
,
1595 skb
->head
, skb
->data
, skb_tail_pointer(skb
),
1596 skb_end_pointer(skb
), skb
->csum
,
1597 skb
->dev
? skb
->dev
->name
: "<NULL>");
1599 port
= lport_priv(lport
);
1600 if (skb_is_nonlinear(skb
))
1601 skb_linearize(skb
); /* not ideal */
1604 * Frame length checks and setting up the header pointers
1605 * was done in fcoe_rcv already.
1607 hp
= (struct fcoe_hdr
*) skb_network_header(skb
);
1609 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1610 if (unlikely(FC_FCOE_DECAPS_VER(hp
) != FC_FCOE_VER
)) {
1611 if (stats
->ErrorFrames
< 5)
1612 printk(KERN_WARNING
"fcoe: FCoE version "
1613 "mismatch: The frame has "
1614 "version %x, but the "
1615 "initiator supports version "
1616 "%x\n", FC_FCOE_DECAPS_VER(hp
),
1621 skb_pull(skb
, sizeof(struct fcoe_hdr
));
1622 fr_len
= skb
->len
- sizeof(struct fcoe_crc_eof
);
1625 stats
->RxWords
+= fr_len
/ FCOE_WORD_TO_BYTE
;
1627 fp
= (struct fc_frame
*)skb
;
1630 fr_sof(fp
) = hp
->fcoe_sof
;
1632 /* Copy out the CRC and EOF trailer for access */
1633 if (skb_copy_bits(skb
, fr_len
, &crc_eof
, sizeof(crc_eof
)))
1635 fr_eof(fp
) = crc_eof
.fcoe_eof
;
1636 fr_crc(fp
) = crc_eof
.fcoe_crc32
;
1637 if (pskb_trim(skb
, fr_len
))
1640 if (!fcoe_filter_frames(lport
, fp
)) {
1642 fc_exch_recv(lport
, fp
);
1646 stats
->ErrorFrames
++;
1652 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1653 * @arg: The per-CPU context
1655 * Return: 0 for success
1657 int fcoe_percpu_receive_thread(void *arg
)
1659 struct fcoe_percpu_s
*p
= arg
;
1660 struct sk_buff
*skb
;
1662 set_user_nice(current
, -20);
1664 while (!kthread_should_stop()) {
1666 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1667 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) == NULL
) {
1668 set_current_state(TASK_INTERRUPTIBLE
);
1669 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1671 set_current_state(TASK_RUNNING
);
1672 if (kthread_should_stop())
1674 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1676 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1677 fcoe_recv_frame(skb
);
1683 * fcoe_dev_setup() - Setup the link change notification interface
1685 static void fcoe_dev_setup(void)
1687 register_netdevice_notifier(&fcoe_notifier
);
1691 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1693 static void fcoe_dev_cleanup(void)
1695 unregister_netdevice_notifier(&fcoe_notifier
);
1699 * fcoe_device_notification() - Handler for net device events
1700 * @notifier: The context of the notification
1701 * @event: The type of event
1702 * @ptr: The net device that the event was on
1704 * This function is called by the Ethernet driver in case of link change event.
1706 * Returns: 0 for success
1708 static int fcoe_device_notification(struct notifier_block
*notifier
,
1709 ulong event
, void *ptr
)
1711 struct fc_lport
*lport
= NULL
;
1712 struct net_device
*netdev
= ptr
;
1713 struct fcoe_interface
*fcoe
;
1714 struct fcoe_port
*port
;
1715 struct fcoe_dev_stats
*stats
;
1716 u32 link_possible
= 1;
1720 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
1721 if (fcoe
->netdev
== netdev
) {
1722 lport
= fcoe
->ctlr
.lp
;
1733 case NETDEV_GOING_DOWN
:
1739 case NETDEV_CHANGEMTU
:
1740 if (netdev
->features
& NETIF_F_FCOE_MTU
)
1742 mfs
= netdev
->mtu
- (sizeof(struct fcoe_hdr
) +
1743 sizeof(struct fcoe_crc_eof
));
1744 if (mfs
>= FC_MIN_MAX_FRAME
)
1745 fc_set_mfs(lport
, mfs
);
1747 case NETDEV_REGISTER
:
1749 case NETDEV_UNREGISTER
:
1750 list_del(&fcoe
->list
);
1751 port
= lport_priv(fcoe
->ctlr
.lp
);
1752 fcoe_interface_cleanup(fcoe
);
1753 queue_work(fcoe_wq
, &port
->destroy_work
);
1756 case NETDEV_FEAT_CHANGE
:
1757 fcoe_netdev_features_change(lport
, netdev
);
1760 FCOE_NETDEV_DBG(netdev
, "Unknown event %ld "
1761 "from netdev netlink\n", event
);
1764 fcoe_link_speed_update(lport
);
1766 if (link_possible
&& !fcoe_link_ok(lport
))
1767 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1768 else if (fcoe_ctlr_link_down(&fcoe
->ctlr
)) {
1769 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1770 stats
->LinkFailureCount
++;
1772 fcoe_clean_pending_queue(lport
);
1779 * fcoe_disable() - Disables a FCoE interface
1780 * @netdev : The net_device object the Ethernet interface to create on
1782 * Called from fcoe transport.
1784 * Returns: 0 for success
1786 static int fcoe_disable(struct net_device
*netdev
)
1788 struct fcoe_interface
*fcoe
;
1791 mutex_lock(&fcoe_config_mutex
);
1794 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1798 fcoe_ctlr_link_down(&fcoe
->ctlr
);
1799 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
1803 mutex_unlock(&fcoe_config_mutex
);
1808 * fcoe_enable() - Enables a FCoE interface
1809 * @netdev : The net_device object the Ethernet interface to create on
1811 * Called from fcoe transport.
1813 * Returns: 0 for success
1815 static int fcoe_enable(struct net_device
*netdev
)
1817 struct fcoe_interface
*fcoe
;
1820 mutex_lock(&fcoe_config_mutex
);
1822 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1827 else if (!fcoe_link_ok(fcoe
->ctlr
.lp
))
1828 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1830 mutex_unlock(&fcoe_config_mutex
);
1835 * fcoe_destroy() - Destroy a FCoE interface
1836 * @netdev : The net_device object the Ethernet interface to create on
1838 * Called from fcoe transport
1840 * Returns: 0 for success
1842 static int fcoe_destroy(struct net_device
*netdev
)
1844 struct fcoe_interface
*fcoe
;
1845 struct fc_lport
*lport
;
1848 mutex_lock(&fcoe_config_mutex
);
1850 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1856 lport
= fcoe
->ctlr
.lp
;
1857 list_del(&fcoe
->list
);
1858 fcoe_interface_cleanup(fcoe
);
1860 fcoe_if_destroy(lport
);
1862 mutex_unlock(&fcoe_config_mutex
);
1867 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1868 * @work: Handle to the FCoE port to be destroyed
1870 static void fcoe_destroy_work(struct work_struct
*work
)
1872 struct fcoe_port
*port
;
1874 port
= container_of(work
, struct fcoe_port
, destroy_work
);
1875 mutex_lock(&fcoe_config_mutex
);
1876 fcoe_if_destroy(port
->lport
);
1877 mutex_unlock(&fcoe_config_mutex
);
1881 * fcoe_match() - Check if the FCoE is supported on the given netdevice
1882 * @netdev : The net_device object the Ethernet interface to create on
1884 * Called from fcoe transport.
1886 * Returns: always returns true as this is the default FCoE transport,
1887 * i.e., support all netdevs.
1889 static bool fcoe_match(struct net_device
*netdev
)
1895 * fcoe_create() - Create a fcoe interface
1896 * @netdev : The net_device object the Ethernet interface to create on
1897 * @fip_mode: The FIP mode for this creation
1899 * Called from fcoe transport
1901 * Returns: 0 for success
1903 static int fcoe_create(struct net_device
*netdev
, enum fip_state fip_mode
)
1906 struct fcoe_interface
*fcoe
;
1907 struct fc_lport
*lport
;
1909 mutex_lock(&fcoe_config_mutex
);
1912 /* look for existing lport */
1913 if (fcoe_hostlist_lookup(netdev
)) {
1918 fcoe
= fcoe_interface_create(netdev
, fip_mode
);
1924 lport
= fcoe_if_create(fcoe
, &netdev
->dev
, 0);
1925 if (IS_ERR(lport
)) {
1926 printk(KERN_ERR
"fcoe: Failed to create interface (%s)\n",
1929 fcoe_interface_cleanup(fcoe
);
1933 /* Make this the "master" N_Port */
1934 fcoe
->ctlr
.lp
= lport
;
1936 /* add to lports list */
1937 fcoe_hostlist_add(lport
);
1939 /* start FIP Discovery and FLOGI */
1940 lport
->boot_time
= jiffies
;
1941 fc_fabric_login(lport
);
1942 if (!fcoe_link_ok(lport
))
1943 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1946 * Release from init in fcoe_interface_create(), on success lport
1947 * should be holding a reference taken in fcoe_if_create().
1949 fcoe_interface_put(fcoe
);
1951 mutex_unlock(&fcoe_config_mutex
);
1955 fcoe_interface_put(fcoe
);
1958 mutex_unlock(&fcoe_config_mutex
);
1963 * fcoe_link_speed_update() - Update the supported and actual link speeds
1964 * @lport: The local port to update speeds for
1966 * Returns: 0 if the ethtool query was successful
1967 * -1 if the ethtool query failed
1969 int fcoe_link_speed_update(struct fc_lport
*lport
)
1971 struct net_device
*netdev
= fcoe_netdev(lport
);
1972 struct ethtool_cmd ecmd
;
1974 if (!dev_ethtool_get_settings(netdev
, &ecmd
)) {
1975 lport
->link_supported_speeds
&=
1976 ~(FC_PORTSPEED_1GBIT
| FC_PORTSPEED_10GBIT
);
1977 if (ecmd
.supported
& (SUPPORTED_1000baseT_Half
|
1978 SUPPORTED_1000baseT_Full
))
1979 lport
->link_supported_speeds
|= FC_PORTSPEED_1GBIT
;
1980 if (ecmd
.supported
& SUPPORTED_10000baseT_Full
)
1981 lport
->link_supported_speeds
|=
1982 FC_PORTSPEED_10GBIT
;
1983 switch (ethtool_cmd_speed(&ecmd
)) {
1985 lport
->link_speed
= FC_PORTSPEED_1GBIT
;
1988 lport
->link_speed
= FC_PORTSPEED_10GBIT
;
1997 * fcoe_link_ok() - Check if the link is OK for a local port
1998 * @lport: The local port to check link on
2000 * Returns: 0 if link is UP and OK, -1 if not
2003 int fcoe_link_ok(struct fc_lport
*lport
)
2005 struct net_device
*netdev
= fcoe_netdev(lport
);
2007 if (netif_oper_up(netdev
))
2013 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2014 * @lport: The local port whose skbs are to be cleared
2016 * Must be called with fcoe_create_mutex held to single-thread completion.
2018 * This flushes the pending skbs by adding a new skb to each queue and
2019 * waiting until they are all freed. This assures us that not only are
2020 * there no packets that will be handled by the lport, but also that any
2021 * threads already handling packet have returned.
2023 void fcoe_percpu_clean(struct fc_lport
*lport
)
2025 struct fcoe_percpu_s
*pp
;
2026 struct fcoe_rcv_info
*fr
;
2027 struct sk_buff_head
*list
;
2028 struct sk_buff
*skb
, *next
;
2029 struct sk_buff
*head
;
2032 for_each_possible_cpu(cpu
) {
2033 pp
= &per_cpu(fcoe_percpu
, cpu
);
2034 spin_lock_bh(&pp
->fcoe_rx_list
.lock
);
2035 list
= &pp
->fcoe_rx_list
;
2037 for (skb
= head
; skb
!= (struct sk_buff
*)list
;
2040 fr
= fcoe_dev_from_skb(skb
);
2041 if (fr
->fr_dev
== lport
) {
2042 __skb_unlink(skb
, list
);
2047 if (!pp
->thread
|| !cpu_online(cpu
)) {
2048 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2052 skb
= dev_alloc_skb(0);
2054 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2057 skb
->destructor
= fcoe_percpu_flush_done
;
2059 __skb_queue_tail(&pp
->fcoe_rx_list
, skb
);
2060 if (pp
->fcoe_rx_list
.qlen
== 1)
2061 wake_up_process(pp
->thread
);
2062 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2064 wait_for_completion(&fcoe_flush_completion
);
2069 * fcoe_reset() - Reset a local port
2070 * @shost: The SCSI host associated with the local port to be reset
2072 * Returns: Always 0 (return value required by FC transport template)
2074 int fcoe_reset(struct Scsi_Host
*shost
)
2076 struct fc_lport
*lport
= shost_priv(shost
);
2077 struct fcoe_port
*port
= lport_priv(lport
);
2078 struct fcoe_interface
*fcoe
= port
->priv
;
2080 fcoe_ctlr_link_down(&fcoe
->ctlr
);
2081 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
2082 if (!fcoe_link_ok(fcoe
->ctlr
.lp
))
2083 fcoe_ctlr_link_up(&fcoe
->ctlr
);
2088 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2089 * @netdev: The net device used as a key
2091 * Locking: Must be called with the RNL mutex held.
2093 * Returns: NULL or the FCoE interface
2095 static struct fcoe_interface
*
2096 fcoe_hostlist_lookup_port(const struct net_device
*netdev
)
2098 struct fcoe_interface
*fcoe
;
2100 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
2101 if (fcoe
->netdev
== netdev
)
2108 * fcoe_hostlist_lookup() - Find the local port associated with a
2110 * @netdev: The netdevice used as a key
2112 * Locking: Must be called with the RTNL mutex held
2114 * Returns: NULL or the local port
2116 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*netdev
)
2118 struct fcoe_interface
*fcoe
;
2120 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2121 return (fcoe
) ? fcoe
->ctlr
.lp
: NULL
;
2125 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2126 * port to the hostlist
2127 * @lport: The local port that identifies the FCoE interface to be added
2129 * Locking: must be called with the RTNL mutex held
2131 * Returns: 0 for success
2133 static int fcoe_hostlist_add(const struct fc_lport
*lport
)
2135 struct fcoe_interface
*fcoe
;
2136 struct fcoe_port
*port
;
2138 fcoe
= fcoe_hostlist_lookup_port(fcoe_netdev(lport
));
2140 port
= lport_priv(lport
);
2142 list_add_tail(&fcoe
->list
, &fcoe_hostlist
);
2148 static struct fcoe_transport fcoe_sw_transport
= {
2149 .name
= {FCOE_TRANSPORT_DEFAULT
},
2151 .list
= LIST_HEAD_INIT(fcoe_sw_transport
.list
),
2152 .match
= fcoe_match
,
2153 .create
= fcoe_create
,
2154 .destroy
= fcoe_destroy
,
2155 .enable
= fcoe_enable
,
2156 .disable
= fcoe_disable
,
2160 * fcoe_init() - Initialize fcoe.ko
2162 * Returns: 0 on success, or a negative value on failure
2164 static int __init
fcoe_init(void)
2166 struct fcoe_percpu_s
*p
;
2170 fcoe_wq
= alloc_workqueue("fcoe", 0, 0);
2174 /* register as a fcoe transport */
2175 rc
= fcoe_transport_attach(&fcoe_sw_transport
);
2177 printk(KERN_ERR
"failed to register an fcoe transport, check "
2178 "if libfcoe is loaded\n");
2182 mutex_lock(&fcoe_config_mutex
);
2184 for_each_possible_cpu(cpu
) {
2185 p
= &per_cpu(fcoe_percpu
, cpu
);
2186 skb_queue_head_init(&p
->fcoe_rx_list
);
2189 for_each_online_cpu(cpu
)
2190 fcoe_percpu_thread_create(cpu
);
2192 /* Initialize per CPU interrupt thread */
2193 rc
= register_hotcpu_notifier(&fcoe_cpu_notifier
);
2197 /* Setup link change notification */
2200 rc
= fcoe_if_init();
2204 mutex_unlock(&fcoe_config_mutex
);
2208 for_each_online_cpu(cpu
) {
2209 fcoe_percpu_thread_destroy(cpu
);
2211 mutex_unlock(&fcoe_config_mutex
);
2212 destroy_workqueue(fcoe_wq
);
2215 module_init(fcoe_init
);
2218 * fcoe_exit() - Clean up fcoe.ko
2220 * Returns: 0 on success or a negative value on failure
2222 static void __exit
fcoe_exit(void)
2224 struct fcoe_interface
*fcoe
, *tmp
;
2225 struct fcoe_port
*port
;
2228 mutex_lock(&fcoe_config_mutex
);
2232 /* releases the associated fcoe hosts */
2234 list_for_each_entry_safe(fcoe
, tmp
, &fcoe_hostlist
, list
) {
2235 list_del(&fcoe
->list
);
2236 port
= lport_priv(fcoe
->ctlr
.lp
);
2237 fcoe_interface_cleanup(fcoe
);
2238 queue_work(fcoe_wq
, &port
->destroy_work
);
2242 unregister_hotcpu_notifier(&fcoe_cpu_notifier
);
2244 for_each_online_cpu(cpu
)
2245 fcoe_percpu_thread_destroy(cpu
);
2247 mutex_unlock(&fcoe_config_mutex
);
2250 * destroy_work's may be chained but destroy_workqueue()
2251 * can take care of them. Just kill the fcoe_wq.
2253 destroy_workqueue(fcoe_wq
);
2256 * Detaching from the scsi transport must happen after all
2257 * destroys are done on the fcoe_wq. destroy_workqueue will
2258 * enusre the fcoe_wq is flushed.
2262 /* detach from fcoe transport */
2263 fcoe_transport_detach(&fcoe_sw_transport
);
2265 module_exit(fcoe_exit
);
2268 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2269 * @seq: active sequence in the FLOGI or FDISC exchange
2270 * @fp: response frame, or error encoded in a pointer (timeout)
2271 * @arg: pointer the the fcoe_ctlr structure
2273 * This handles MAC address management for FCoE, then passes control on to
2274 * the libfc FLOGI response handler.
2276 static void fcoe_flogi_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2278 struct fcoe_ctlr
*fip
= arg
;
2279 struct fc_exch
*exch
= fc_seq_exch(seq
);
2280 struct fc_lport
*lport
= exch
->lp
;
2286 mac
= fr_cb(fp
)->granted_mac
;
2287 if (is_zero_ether_addr(mac
)) {
2289 if (fcoe_ctlr_recv_flogi(fip
, lport
, fp
)) {
2294 fcoe_update_src_mac(lport
, mac
);
2296 fc_lport_flogi_resp(seq
, fp
, lport
);
2300 * fcoe_logo_resp() - FCoE specific LOGO response handler
2301 * @seq: active sequence in the LOGO exchange
2302 * @fp: response frame, or error encoded in a pointer (timeout)
2303 * @arg: pointer the the fcoe_ctlr structure
2305 * This handles MAC address management for FCoE, then passes control on to
2306 * the libfc LOGO response handler.
2308 static void fcoe_logo_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2310 struct fc_lport
*lport
= arg
;
2311 static u8 zero_mac
[ETH_ALEN
] = { 0 };
2314 fcoe_update_src_mac(lport
, zero_mac
);
2315 fc_lport_logo_resp(seq
, fp
, lport
);
2319 * fcoe_elsct_send - FCoE specific ELS handler
2321 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2322 * using FCoE specific response handlers and passing the FIP controller as
2323 * the argument (the lport is still available from the exchange).
2325 * Most of the work here is just handed off to the libfc routine.
2327 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*lport
, u32 did
,
2328 struct fc_frame
*fp
, unsigned int op
,
2329 void (*resp
)(struct fc_seq
*,
2332 void *arg
, u32 timeout
)
2334 struct fcoe_port
*port
= lport_priv(lport
);
2335 struct fcoe_interface
*fcoe
= port
->priv
;
2336 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
2337 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
2342 if (lport
->point_to_multipoint
)
2344 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_flogi_resp
,
2347 /* only hook onto fabric logouts, not port logouts */
2348 if (ntoh24(fh
->fh_d_id
) != FC_FID_FLOGI
)
2350 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_logo_resp
,
2353 return fc_elsct_send(lport
, did
, fp
, op
, resp
, arg
, timeout
);
2357 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2358 * @vport: fc_vport object to create a new fc_host for
2359 * @disabled: start the new fc_host in a disabled state by default?
2361 * Returns: 0 for success
2363 static int fcoe_vport_create(struct fc_vport
*vport
, bool disabled
)
2365 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2366 struct fc_lport
*n_port
= shost_priv(shost
);
2367 struct fcoe_port
*port
= lport_priv(n_port
);
2368 struct fcoe_interface
*fcoe
= port
->priv
;
2369 struct net_device
*netdev
= fcoe
->netdev
;
2370 struct fc_lport
*vn_port
;
2374 rc
= fcoe_validate_vport_create(vport
);
2376 wwn_to_str(vport
->port_name
, buf
, sizeof(buf
));
2377 printk(KERN_ERR
"fcoe: Failed to create vport, "
2378 "WWPN (0x%s) already exists\n",
2383 mutex_lock(&fcoe_config_mutex
);
2384 vn_port
= fcoe_if_create(fcoe
, &vport
->dev
, 1);
2385 mutex_unlock(&fcoe_config_mutex
);
2387 if (IS_ERR(vn_port
)) {
2388 printk(KERN_ERR
"fcoe: fcoe_vport_create(%s) failed\n",
2394 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2396 vn_port
->boot_time
= jiffies
;
2397 fc_fabric_login(vn_port
);
2398 fc_vport_setlink(vn_port
);
2404 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2405 * @vport: fc_vport object that is being destroyed
2407 * Returns: 0 for success
2409 static int fcoe_vport_destroy(struct fc_vport
*vport
)
2411 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2412 struct fc_lport
*n_port
= shost_priv(shost
);
2413 struct fc_lport
*vn_port
= vport
->dd_data
;
2414 struct fcoe_port
*port
= lport_priv(vn_port
);
2416 mutex_lock(&n_port
->lp_mutex
);
2417 list_del(&vn_port
->list
);
2418 mutex_unlock(&n_port
->lp_mutex
);
2419 queue_work(fcoe_wq
, &port
->destroy_work
);
2424 * fcoe_vport_disable() - change vport state
2425 * @vport: vport to bring online/offline
2426 * @disable: should the vport be disabled?
2428 static int fcoe_vport_disable(struct fc_vport
*vport
, bool disable
)
2430 struct fc_lport
*lport
= vport
->dd_data
;
2433 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2434 fc_fabric_logoff(lport
);
2436 lport
->boot_time
= jiffies
;
2437 fc_fabric_login(lport
);
2438 fc_vport_setlink(lport
);
2445 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2446 * @vport: fc_vport with a new symbolic name string
2448 * After generating a new symbolic name string, a new RSPN_ID request is
2449 * sent to the name server. There is no response handler, so if it fails
2450 * for some reason it will not be retried.
2452 static void fcoe_set_vport_symbolic_name(struct fc_vport
*vport
)
2454 struct fc_lport
*lport
= vport
->dd_data
;
2455 struct fc_frame
*fp
;
2458 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
2459 "%s v%s over %s : %s", FCOE_NAME
, FCOE_VERSION
,
2460 fcoe_netdev(lport
)->name
, vport
->symbolic_name
);
2462 if (lport
->state
!= LPORT_ST_READY
)
2465 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
2466 fp
= fc_frame_alloc(lport
,
2467 sizeof(struct fc_ct_hdr
) +
2468 sizeof(struct fc_ns_rspn
) + len
);
2471 lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, FC_NS_RSPN_ID
,
2472 NULL
, NULL
, 3 * lport
->r_a_tov
);
2476 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2477 * @lport: the local port
2478 * @fc_lesb: the link error status block
2480 static void fcoe_get_lesb(struct fc_lport
*lport
,
2481 struct fc_els_lesb
*fc_lesb
)
2484 u32 lfc
, vlfc
, mdac
;
2485 struct fcoe_dev_stats
*devst
;
2486 struct fcoe_fc_els_lesb
*lesb
;
2487 struct rtnl_link_stats64 temp
;
2488 struct net_device
*netdev
= fcoe_netdev(lport
);
2493 lesb
= (struct fcoe_fc_els_lesb
*)fc_lesb
;
2494 memset(lesb
, 0, sizeof(*lesb
));
2495 for_each_possible_cpu(cpu
) {
2496 devst
= per_cpu_ptr(lport
->dev_stats
, cpu
);
2497 lfc
+= devst
->LinkFailureCount
;
2498 vlfc
+= devst
->VLinkFailureCount
;
2499 mdac
+= devst
->MissDiscAdvCount
;
2501 lesb
->lesb_link_fail
= htonl(lfc
);
2502 lesb
->lesb_vlink_fail
= htonl(vlfc
);
2503 lesb
->lesb_miss_fka
= htonl(mdac
);
2504 lesb
->lesb_fcs_error
= htonl(dev_get_stats(netdev
, &temp
)->rx_crc_errors
);
2508 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2509 * @lport: the local port
2510 * @port_id: the port ID
2511 * @fp: the received frame, if any, that caused the port_id to be set.
2513 * This routine handles the case where we received a FLOGI and are
2514 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2515 * so it can set the non-mapped mode and gateway address.
2517 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2519 static void fcoe_set_port_id(struct fc_lport
*lport
,
2520 u32 port_id
, struct fc_frame
*fp
)
2522 struct fcoe_port
*port
= lport_priv(lport
);
2523 struct fcoe_interface
*fcoe
= port
->priv
;
2525 if (fp
&& fc_frame_payload_op(fp
) == ELS_FLOGI
)
2526 fcoe_ctlr_recv_flogi(&fcoe
->ctlr
, lport
, fp
);
2530 * fcoe_validate_vport_create() - Validate a vport before creating it
2531 * @vport: NPIV port to be created
2533 * This routine is meant to add validation for a vport before creating it
2534 * via fcoe_vport_create().
2535 * Current validations are:
2536 * - WWPN supplied is unique for given lport
2540 static int fcoe_validate_vport_create(struct fc_vport
*vport
)
2542 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2543 struct fc_lport
*n_port
= shost_priv(shost
);
2544 struct fc_lport
*vn_port
;
2548 mutex_lock(&n_port
->lp_mutex
);
2550 wwn_to_str(vport
->port_name
, buf
, sizeof(buf
));
2551 /* Check if the wwpn is not same as that of the lport */
2552 if (!memcmp(&n_port
->wwpn
, &vport
->port_name
, sizeof(u64
))) {
2553 FCOE_DBG("vport WWPN 0x%s is same as that of the "
2554 "base port WWPN\n", buf
);
2559 /* Check if there is any existing vport with same wwpn */
2560 list_for_each_entry(vn_port
, &n_port
->vports
, list
) {
2561 if (!memcmp(&vn_port
->wwpn
, &vport
->port_name
, sizeof(u64
))) {
2562 FCOE_DBG("vport with given WWPN 0x%s already "
2570 mutex_unlock(&n_port
->lp_mutex
);