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
);
102 static int fcoe_ddp_target(struct fc_lport
*, u16
, struct scatterlist
*,
104 static int fcoe_cpu_callback(struct notifier_block
*, unsigned long, void *);
106 static bool fcoe_match(struct net_device
*netdev
);
107 static int fcoe_create(struct net_device
*netdev
, enum fip_state fip_mode
);
108 static int fcoe_destroy(struct net_device
*netdev
);
109 static int fcoe_enable(struct net_device
*netdev
);
110 static int fcoe_disable(struct net_device
*netdev
);
112 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*,
113 u32 did
, struct fc_frame
*,
115 void (*resp
)(struct fc_seq
*,
118 void *, u32 timeout
);
119 static void fcoe_recv_frame(struct sk_buff
*skb
);
121 static void fcoe_get_lesb(struct fc_lport
*, struct fc_els_lesb
*);
123 /* notification function for packets from net device */
124 static struct notifier_block fcoe_notifier
= {
125 .notifier_call
= fcoe_device_notification
,
128 /* notification function for CPU hotplug events */
129 static struct notifier_block fcoe_cpu_notifier
= {
130 .notifier_call
= fcoe_cpu_callback
,
133 static struct scsi_transport_template
*fcoe_nport_scsi_transport
;
134 static struct scsi_transport_template
*fcoe_vport_scsi_transport
;
136 static int fcoe_vport_destroy(struct fc_vport
*);
137 static int fcoe_vport_create(struct fc_vport
*, bool disabled
);
138 static int fcoe_vport_disable(struct fc_vport
*, bool disable
);
139 static void fcoe_set_vport_symbolic_name(struct fc_vport
*);
140 static void fcoe_set_port_id(struct fc_lport
*, u32
, struct fc_frame
*);
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 .ddp_target
= fcoe_ddp_target
,
147 .elsct_send
= fcoe_elsct_send
,
148 .get_lesb
= fcoe_get_lesb
,
149 .lport_set_port_id
= fcoe_set_port_id
,
152 struct fc_function_template fcoe_nport_fc_functions
= {
153 .show_host_node_name
= 1,
154 .show_host_port_name
= 1,
155 .show_host_supported_classes
= 1,
156 .show_host_supported_fc4s
= 1,
157 .show_host_active_fc4s
= 1,
158 .show_host_maxframe_size
= 1,
160 .show_host_port_id
= 1,
161 .show_host_supported_speeds
= 1,
162 .get_host_speed
= fc_get_host_speed
,
163 .show_host_speed
= 1,
164 .show_host_port_type
= 1,
165 .get_host_port_state
= fc_get_host_port_state
,
166 .show_host_port_state
= 1,
167 .show_host_symbolic_name
= 1,
169 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
170 .show_rport_maxframe_size
= 1,
171 .show_rport_supported_classes
= 1,
173 .show_host_fabric_name
= 1,
174 .show_starget_node_name
= 1,
175 .show_starget_port_name
= 1,
176 .show_starget_port_id
= 1,
177 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
178 .show_rport_dev_loss_tmo
= 1,
179 .get_fc_host_stats
= fc_get_host_stats
,
180 .issue_fc_host_lip
= fcoe_reset
,
182 .terminate_rport_io
= fc_rport_terminate_io
,
184 .vport_create
= fcoe_vport_create
,
185 .vport_delete
= fcoe_vport_destroy
,
186 .vport_disable
= fcoe_vport_disable
,
187 .set_vport_symbolic_name
= fcoe_set_vport_symbolic_name
,
189 .bsg_request
= fc_lport_bsg_request
,
192 struct fc_function_template fcoe_vport_fc_functions
= {
193 .show_host_node_name
= 1,
194 .show_host_port_name
= 1,
195 .show_host_supported_classes
= 1,
196 .show_host_supported_fc4s
= 1,
197 .show_host_active_fc4s
= 1,
198 .show_host_maxframe_size
= 1,
200 .show_host_port_id
= 1,
201 .show_host_supported_speeds
= 1,
202 .get_host_speed
= fc_get_host_speed
,
203 .show_host_speed
= 1,
204 .show_host_port_type
= 1,
205 .get_host_port_state
= fc_get_host_port_state
,
206 .show_host_port_state
= 1,
207 .show_host_symbolic_name
= 1,
209 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
210 .show_rport_maxframe_size
= 1,
211 .show_rport_supported_classes
= 1,
213 .show_host_fabric_name
= 1,
214 .show_starget_node_name
= 1,
215 .show_starget_port_name
= 1,
216 .show_starget_port_id
= 1,
217 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
218 .show_rport_dev_loss_tmo
= 1,
219 .get_fc_host_stats
= fc_get_host_stats
,
220 .issue_fc_host_lip
= fcoe_reset
,
222 .terminate_rport_io
= fc_rport_terminate_io
,
224 .bsg_request
= fc_lport_bsg_request
,
227 static struct scsi_host_template fcoe_shost_template
= {
228 .module
= THIS_MODULE
,
229 .name
= "FCoE Driver",
230 .proc_name
= FCOE_NAME
,
231 .queuecommand
= fc_queuecommand
,
232 .eh_abort_handler
= fc_eh_abort
,
233 .eh_device_reset_handler
= fc_eh_device_reset
,
234 .eh_host_reset_handler
= fc_eh_host_reset
,
235 .slave_alloc
= fc_slave_alloc
,
236 .change_queue_depth
= fc_change_queue_depth
,
237 .change_queue_type
= fc_change_queue_type
,
240 .can_queue
= FCOE_MAX_OUTSTANDING_COMMANDS
,
241 .use_clustering
= ENABLE_CLUSTERING
,
242 .sg_tablesize
= SG_ALL
,
243 .max_sectors
= 0xffff,
247 * fcoe_interface_setup() - Setup a FCoE interface
248 * @fcoe: The new FCoE interface
249 * @netdev: The net device that the fcoe interface is on
251 * Returns : 0 for success
252 * Locking: must be called with the RTNL mutex held
254 static int fcoe_interface_setup(struct fcoe_interface
*fcoe
,
255 struct net_device
*netdev
)
257 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
258 struct netdev_hw_addr
*ha
;
259 struct net_device
*real_dev
;
260 u8 flogi_maddr
[ETH_ALEN
];
261 const struct net_device_ops
*ops
;
263 fcoe
->netdev
= netdev
;
265 /* Let LLD initialize for FCoE */
266 ops
= netdev
->netdev_ops
;
267 if (ops
->ndo_fcoe_enable
) {
268 if (ops
->ndo_fcoe_enable(netdev
))
269 FCOE_NETDEV_DBG(netdev
, "Failed to enable FCoE"
270 " specific feature for LLD.\n");
273 /* Do not support for bonding device */
274 if (netdev
->priv_flags
& IFF_BONDING
&& netdev
->flags
& IFF_MASTER
) {
275 FCOE_NETDEV_DBG(netdev
, "Bonded interfaces not supported\n");
279 /* look for SAN MAC address, if multiple SAN MACs exist, only
280 * use the first one for SPMA */
281 real_dev
= (netdev
->priv_flags
& IFF_802_1Q_VLAN
) ?
282 vlan_dev_real_dev(netdev
) : netdev
;
284 for_each_dev_addr(real_dev
, ha
) {
285 if ((ha
->type
== NETDEV_HW_ADDR_T_SAN
) &&
286 (is_valid_ether_addr(ha
->addr
))) {
287 memcpy(fip
->ctl_src_addr
, ha
->addr
, ETH_ALEN
);
294 /* setup Source Mac Address */
296 memcpy(fip
->ctl_src_addr
, netdev
->dev_addr
, netdev
->addr_len
);
299 * Add FCoE MAC address as second unicast MAC address
300 * or enter promiscuous mode if not capable of listening
301 * for multiple unicast MACs.
303 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
304 dev_uc_add(netdev
, flogi_maddr
);
306 dev_uc_add(netdev
, fip
->ctl_src_addr
);
307 if (fip
->mode
== FIP_MODE_VN2VN
) {
308 dev_mc_add(netdev
, FIP_ALL_VN2VN_MACS
);
309 dev_mc_add(netdev
, FIP_ALL_P2P_MACS
);
311 dev_mc_add(netdev
, FIP_ALL_ENODE_MACS
);
314 * setup the receive function from ethernet driver
315 * on the ethertype for the given device
317 fcoe
->fcoe_packet_type
.func
= fcoe_rcv
;
318 fcoe
->fcoe_packet_type
.type
= __constant_htons(ETH_P_FCOE
);
319 fcoe
->fcoe_packet_type
.dev
= netdev
;
320 dev_add_pack(&fcoe
->fcoe_packet_type
);
322 fcoe
->fip_packet_type
.func
= fcoe_fip_recv
;
323 fcoe
->fip_packet_type
.type
= htons(ETH_P_FIP
);
324 fcoe
->fip_packet_type
.dev
= netdev
;
325 dev_add_pack(&fcoe
->fip_packet_type
);
331 * fcoe_interface_create() - Create a FCoE interface on a net device
332 * @netdev: The net device to create the FCoE interface on
333 * @fip_mode: The mode to use for FIP
335 * Returns: pointer to a struct fcoe_interface or NULL on error
337 static struct fcoe_interface
*fcoe_interface_create(struct net_device
*netdev
,
338 enum fip_state fip_mode
)
340 struct fcoe_interface
*fcoe
;
343 if (!try_module_get(THIS_MODULE
)) {
344 FCOE_NETDEV_DBG(netdev
,
345 "Could not get a reference to the module\n");
346 fcoe
= ERR_PTR(-EBUSY
);
350 fcoe
= kzalloc(sizeof(*fcoe
), GFP_KERNEL
);
352 FCOE_NETDEV_DBG(netdev
, "Could not allocate fcoe structure\n");
353 fcoe
= ERR_PTR(-ENOMEM
);
358 kref_init(&fcoe
->kref
);
363 fcoe_ctlr_init(&fcoe
->ctlr
, fip_mode
);
364 fcoe
->ctlr
.send
= fcoe_fip_send
;
365 fcoe
->ctlr
.update_mac
= fcoe_update_src_mac
;
366 fcoe
->ctlr
.get_src_addr
= fcoe_get_src_mac
;
368 err
= fcoe_interface_setup(fcoe
, netdev
);
370 fcoe_ctlr_destroy(&fcoe
->ctlr
);
380 module_put(THIS_MODULE
);
386 * fcoe_interface_release() - fcoe_port kref release function
387 * @kref: Embedded reference count in an fcoe_interface struct
389 static void fcoe_interface_release(struct kref
*kref
)
391 struct fcoe_interface
*fcoe
;
392 struct net_device
*netdev
;
394 fcoe
= container_of(kref
, struct fcoe_interface
, kref
);
395 netdev
= fcoe
->netdev
;
396 /* tear-down the FCoE controller */
397 fcoe_ctlr_destroy(&fcoe
->ctlr
);
400 module_put(THIS_MODULE
);
404 * fcoe_interface_get() - Get a reference to a FCoE interface
405 * @fcoe: The FCoE interface to be held
407 static inline void fcoe_interface_get(struct fcoe_interface
*fcoe
)
409 kref_get(&fcoe
->kref
);
413 * fcoe_interface_put() - Put a reference to a FCoE interface
414 * @fcoe: The FCoE interface to be released
416 static inline void fcoe_interface_put(struct fcoe_interface
*fcoe
)
418 kref_put(&fcoe
->kref
, fcoe_interface_release
);
422 * fcoe_interface_cleanup() - Clean up a FCoE interface
423 * @fcoe: The FCoE interface to be cleaned up
425 * Caller must be holding the RTNL mutex
427 void fcoe_interface_cleanup(struct fcoe_interface
*fcoe
)
429 struct net_device
*netdev
= fcoe
->netdev
;
430 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
431 u8 flogi_maddr
[ETH_ALEN
];
432 const struct net_device_ops
*ops
;
435 * Don't listen for Ethernet packets anymore.
436 * synchronize_net() ensures that the packet handlers are not running
437 * on another CPU. dev_remove_pack() would do that, this calls the
438 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
440 __dev_remove_pack(&fcoe
->fcoe_packet_type
);
441 __dev_remove_pack(&fcoe
->fip_packet_type
);
444 /* Delete secondary MAC addresses */
445 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
446 dev_uc_del(netdev
, flogi_maddr
);
448 dev_uc_del(netdev
, fip
->ctl_src_addr
);
449 if (fip
->mode
== FIP_MODE_VN2VN
) {
450 dev_mc_del(netdev
, FIP_ALL_VN2VN_MACS
);
451 dev_mc_del(netdev
, FIP_ALL_P2P_MACS
);
453 dev_mc_del(netdev
, FIP_ALL_ENODE_MACS
);
455 /* Tell the LLD we are done w/ FCoE */
456 ops
= netdev
->netdev_ops
;
457 if (ops
->ndo_fcoe_disable
) {
458 if (ops
->ndo_fcoe_disable(netdev
))
459 FCOE_NETDEV_DBG(netdev
, "Failed to disable FCoE"
460 " specific feature for LLD.\n");
463 /* Release the self-reference taken during fcoe_interface_create() */
464 fcoe_interface_put(fcoe
);
468 * fcoe_fip_recv() - Handler for received FIP frames
469 * @skb: The receive skb
470 * @netdev: The associated net device
471 * @ptype: The packet_type structure which was used to register this handler
472 * @orig_dev: The original net_device the the skb was received on.
473 * (in case dev is a bond)
475 * Returns: 0 for success
477 static int fcoe_fip_recv(struct sk_buff
*skb
, struct net_device
*netdev
,
478 struct packet_type
*ptype
,
479 struct net_device
*orig_dev
)
481 struct fcoe_interface
*fcoe
;
483 fcoe
= container_of(ptype
, struct fcoe_interface
, fip_packet_type
);
484 fcoe_ctlr_recv(&fcoe
->ctlr
, skb
);
489 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
490 * @port: The FCoE port
491 * @skb: The FIP/FCoE packet to be sent
493 static void fcoe_port_send(struct fcoe_port
*port
, struct sk_buff
*skb
)
495 if (port
->fcoe_pending_queue
.qlen
)
496 fcoe_check_wait_queue(port
->lport
, skb
);
497 else if (fcoe_start_io(skb
))
498 fcoe_check_wait_queue(port
->lport
, skb
);
502 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
503 * @fip: The FCoE controller
504 * @skb: The FIP packet to be sent
506 static void fcoe_fip_send(struct fcoe_ctlr
*fip
, struct sk_buff
*skb
)
508 skb
->dev
= fcoe_from_ctlr(fip
)->netdev
;
509 fcoe_port_send(lport_priv(fip
->lp
), skb
);
513 * fcoe_update_src_mac() - Update the Ethernet MAC filters
514 * @lport: The local port to update the source MAC on
515 * @addr: Unicast MAC address to add
517 * Remove any previously-set unicast MAC filter.
518 * Add secondary FCoE MAC address filter for our OUI.
520 static void fcoe_update_src_mac(struct fc_lport
*lport
, u8
*addr
)
522 struct fcoe_port
*port
= lport_priv(lport
);
523 struct fcoe_interface
*fcoe
= port
->priv
;
526 if (!is_zero_ether_addr(port
->data_src_addr
))
527 dev_uc_del(fcoe
->netdev
, port
->data_src_addr
);
528 if (!is_zero_ether_addr(addr
))
529 dev_uc_add(fcoe
->netdev
, addr
);
530 memcpy(port
->data_src_addr
, addr
, ETH_ALEN
);
535 * fcoe_get_src_mac() - return the Ethernet source address for an lport
536 * @lport: libfc lport
538 static u8
*fcoe_get_src_mac(struct fc_lport
*lport
)
540 struct fcoe_port
*port
= lport_priv(lport
);
542 return port
->data_src_addr
;
546 * fcoe_lport_config() - Set up a local port
547 * @lport: The local port to be setup
549 * Returns: 0 for success
551 static int fcoe_lport_config(struct fc_lport
*lport
)
555 lport
->max_retry_count
= 3;
556 lport
->max_rport_retry_count
= 3;
557 lport
->e_d_tov
= 2 * 1000; /* FC-FS default */
558 lport
->r_a_tov
= 2 * 2 * 1000;
559 lport
->service_params
= (FCP_SPPF_INIT_FCN
| FCP_SPPF_RD_XRDY_DIS
|
560 FCP_SPPF_RETRY
| FCP_SPPF_CONF_COMPL
);
561 lport
->does_npiv
= 1;
563 fc_lport_init_stats(lport
);
565 /* lport fc_lport related configuration */
566 fc_lport_config(lport
);
568 /* offload related configuration */
569 lport
->crc_offload
= 0;
570 lport
->seq_offload
= 0;
571 lport
->lro_enabled
= 0;
579 * fcoe_netdev_features_change - Updates the lport's offload flags based
580 * on the LLD netdev's FCoE feature flags
582 static void fcoe_netdev_features_change(struct fc_lport
*lport
,
583 struct net_device
*netdev
)
585 mutex_lock(&lport
->lp_mutex
);
587 if (netdev
->features
& NETIF_F_SG
)
592 if (netdev
->features
& NETIF_F_FCOE_CRC
) {
593 lport
->crc_offload
= 1;
594 FCOE_NETDEV_DBG(netdev
, "Supports FCCRC offload\n");
596 lport
->crc_offload
= 0;
599 if (netdev
->features
& NETIF_F_FSO
) {
600 lport
->seq_offload
= 1;
601 lport
->lso_max
= netdev
->gso_max_size
;
602 FCOE_NETDEV_DBG(netdev
, "Supports LSO for max len 0x%x\n",
605 lport
->seq_offload
= 0;
609 if (netdev
->fcoe_ddp_xid
) {
610 lport
->lro_enabled
= 1;
611 lport
->lro_xid
= netdev
->fcoe_ddp_xid
;
612 FCOE_NETDEV_DBG(netdev
, "Supports LRO for max xid 0x%x\n",
615 lport
->lro_enabled
= 0;
619 mutex_unlock(&lport
->lp_mutex
);
623 * fcoe_netdev_config() - Set up net devive for SW FCoE
624 * @lport: The local port that is associated with the net device
625 * @netdev: The associated net device
627 * Must be called after fcoe_lport_config() as it will use local port mutex
629 * Returns: 0 for success
631 static int fcoe_netdev_config(struct fc_lport
*lport
, struct net_device
*netdev
)
635 struct fcoe_interface
*fcoe
;
636 struct fcoe_port
*port
;
638 /* Setup lport private data to point to fcoe softc */
639 port
= lport_priv(lport
);
643 * Determine max frame size based on underlying device and optional
644 * user-configured limit. If the MFS is too low, fcoe_link_ok()
645 * will return 0, so do this first.
648 if (netdev
->features
& NETIF_F_FCOE_MTU
) {
650 FCOE_NETDEV_DBG(netdev
, "Supports FCOE_MTU of %d bytes\n", mfs
);
652 mfs
-= (sizeof(struct fcoe_hdr
) + sizeof(struct fcoe_crc_eof
));
653 if (fc_set_mfs(lport
, mfs
))
656 /* offload features support */
657 fcoe_netdev_features_change(lport
, netdev
);
659 skb_queue_head_init(&port
->fcoe_pending_queue
);
660 port
->fcoe_pending_queue_active
= 0;
661 setup_timer(&port
->timer
, fcoe_queue_timer
, (unsigned long)lport
);
663 fcoe_link_speed_update(lport
);
666 if (fcoe_get_wwn(netdev
, &wwnn
, NETDEV_FCOE_WWNN
))
667 wwnn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
, 1, 0);
668 fc_set_wwnn(lport
, wwnn
);
669 if (fcoe_get_wwn(netdev
, &wwpn
, NETDEV_FCOE_WWPN
))
670 wwpn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
,
672 fc_set_wwpn(lport
, wwpn
);
679 * fcoe_shost_config() - Set up the SCSI host associated with a local port
680 * @lport: The local port
681 * @dev: The device associated with the SCSI host
683 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
685 * Returns: 0 for success
687 static int fcoe_shost_config(struct fc_lport
*lport
, struct device
*dev
)
691 /* lport scsi host config */
692 lport
->host
->max_lun
= FCOE_MAX_LUN
;
693 lport
->host
->max_id
= FCOE_MAX_FCP_TARGET
;
694 lport
->host
->max_channel
= 0;
695 lport
->host
->max_cmd_len
= FCOE_MAX_CMD_LEN
;
698 lport
->host
->transportt
= fcoe_vport_scsi_transport
;
700 lport
->host
->transportt
= fcoe_nport_scsi_transport
;
702 /* add the new host to the SCSI-ml */
703 rc
= scsi_add_host(lport
->host
, dev
);
705 FCOE_NETDEV_DBG(fcoe_netdev(lport
), "fcoe_shost_config: "
706 "error on scsi_add_host\n");
711 fc_host_max_npiv_vports(lport
->host
) = USHRT_MAX
;
713 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
714 "%s v%s over %s", FCOE_NAME
, FCOE_VERSION
,
715 fcoe_netdev(lport
)->name
);
721 * fcoe_oem_match() - The match routine for the offloaded exchange manager
724 * This routine will be associated with an exchange manager (EM). When
725 * the libfc exchange handling code is looking for an EM to use it will
726 * call this routine and pass it the frame that it wishes to send. This
727 * routine will return True if the associated EM is to be used and False
728 * if the echange code should continue looking for an EM.
730 * The offload EM that this routine is associated with will handle any
731 * packets that are for SCSI read requests.
733 * This has been enhanced to work when FCoE stack is operating in target
736 * Returns: True for read types I/O, otherwise returns false.
738 bool fcoe_oem_match(struct fc_frame
*fp
)
740 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
741 struct fcp_cmnd
*fcp
;
743 if (fc_fcp_is_read(fr_fsp(fp
)) &&
744 (fr_fsp(fp
)->data_len
> fcoe_ddp_min
))
746 else if (!(ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)) {
747 fcp
= fc_frame_payload_get(fp
, sizeof(*fcp
));
748 if (ntohs(fh
->fh_rx_id
) == FC_XID_UNKNOWN
&&
749 fcp
&& (ntohl(fcp
->fc_dl
) > fcoe_ddp_min
) &&
750 (fcp
->fc_flags
& FCP_CFL_WRDATA
))
757 * fcoe_em_config() - Allocate and configure an exchange manager
758 * @lport: The local port that the new EM will be associated with
760 * Returns: 0 on success
762 static inline int fcoe_em_config(struct fc_lport
*lport
)
764 struct fcoe_port
*port
= lport_priv(lport
);
765 struct fcoe_interface
*fcoe
= port
->priv
;
766 struct fcoe_interface
*oldfcoe
= NULL
;
767 struct net_device
*old_real_dev
, *cur_real_dev
;
768 u16 min_xid
= FCOE_MIN_XID
;
769 u16 max_xid
= FCOE_MAX_XID
;
772 * Check if need to allocate an em instance for
773 * offload exchange ids to be shared across all VN_PORTs/lport.
775 if (!lport
->lro_enabled
|| !lport
->lro_xid
||
776 (lport
->lro_xid
>= max_xid
)) {
782 * Reuse existing offload em instance in case
783 * it is already allocated on real eth device
785 if (fcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
786 cur_real_dev
= vlan_dev_real_dev(fcoe
->netdev
);
788 cur_real_dev
= fcoe
->netdev
;
790 list_for_each_entry(oldfcoe
, &fcoe_hostlist
, list
) {
791 if (oldfcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
792 old_real_dev
= vlan_dev_real_dev(oldfcoe
->netdev
);
794 old_real_dev
= oldfcoe
->netdev
;
796 if (cur_real_dev
== old_real_dev
) {
797 fcoe
->oem
= oldfcoe
->oem
;
803 if (!fc_exch_mgr_add(lport
, fcoe
->oem
, fcoe_oem_match
)) {
804 printk(KERN_ERR
"fcoe_em_config: failed to add "
805 "offload em:%p on interface:%s\n",
806 fcoe
->oem
, fcoe
->netdev
->name
);
810 fcoe
->oem
= fc_exch_mgr_alloc(lport
, FC_CLASS_3
,
811 FCOE_MIN_XID
, lport
->lro_xid
,
814 printk(KERN_ERR
"fcoe_em_config: failed to allocate "
815 "em for offload exches on interface:%s\n",
822 * Exclude offload EM xid range from next EM xid range.
824 min_xid
+= lport
->lro_xid
+ 1;
827 if (!fc_exch_mgr_alloc(lport
, FC_CLASS_3
, min_xid
, max_xid
, NULL
)) {
828 printk(KERN_ERR
"fcoe_em_config: failed to "
829 "allocate em on interface %s\n", fcoe
->netdev
->name
);
837 * fcoe_if_destroy() - Tear down a SW FCoE instance
838 * @lport: The local port to be destroyed
841 static void fcoe_if_destroy(struct fc_lport
*lport
)
843 struct fcoe_port
*port
= lport_priv(lport
);
844 struct fcoe_interface
*fcoe
= port
->priv
;
845 struct net_device
*netdev
= fcoe
->netdev
;
847 FCOE_NETDEV_DBG(netdev
, "Destroying interface\n");
849 /* Logout of the fabric */
850 fc_fabric_logoff(lport
);
852 /* Cleanup the fc_lport */
853 fc_lport_destroy(lport
);
855 /* Stop the transmit retry timer */
856 del_timer_sync(&port
->timer
);
858 /* Free existing transmit skbs */
859 fcoe_clean_pending_queue(lport
);
862 if (!is_zero_ether_addr(port
->data_src_addr
))
863 dev_uc_del(netdev
, port
->data_src_addr
);
866 /* Release reference held in fcoe_if_create() */
867 fcoe_interface_put(fcoe
);
869 /* Free queued packets for the per-CPU receive threads */
870 fcoe_percpu_clean(lport
);
872 /* Detach from the scsi-ml */
873 fc_remove_host(lport
->host
);
874 scsi_remove_host(lport
->host
);
876 /* Destroy lport scsi_priv */
877 fc_fcp_destroy(lport
);
879 /* There are no more rports or I/O, free the EM */
880 fc_exch_mgr_free(lport
);
882 /* Free memory used by statistical counters */
883 fc_lport_free_stats(lport
);
885 /* Release the Scsi_Host */
886 scsi_host_put(lport
->host
);
890 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
891 * @lport: The local port to setup DDP for
892 * @xid: The exchange ID for this DDP transfer
893 * @sgl: The scatterlist describing this transfer
894 * @sgc: The number of sg items
896 * Returns: 0 if the DDP context was not configured
898 static int fcoe_ddp_setup(struct fc_lport
*lport
, u16 xid
,
899 struct scatterlist
*sgl
, unsigned int sgc
)
901 struct net_device
*netdev
= fcoe_netdev(lport
);
903 if (netdev
->netdev_ops
->ndo_fcoe_ddp_setup
)
904 return netdev
->netdev_ops
->ndo_fcoe_ddp_setup(netdev
,
912 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
913 * @lport: The local port to setup DDP for
914 * @xid: The exchange ID for this DDP transfer
915 * @sgl: The scatterlist describing this transfer
916 * @sgc: The number of sg items
918 * Returns: 0 if the DDP context was not configured
920 static int fcoe_ddp_target(struct fc_lport
*lport
, u16 xid
,
921 struct scatterlist
*sgl
, unsigned int sgc
)
923 struct net_device
*netdev
= fcoe_netdev(lport
);
925 if (netdev
->netdev_ops
->ndo_fcoe_ddp_target
)
926 return netdev
->netdev_ops
->ndo_fcoe_ddp_target(netdev
, xid
,
934 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
935 * @lport: The local port to complete DDP on
936 * @xid: The exchange ID for this DDP transfer
938 * Returns: the length of data that have been completed by DDP
940 static int fcoe_ddp_done(struct fc_lport
*lport
, u16 xid
)
942 struct net_device
*netdev
= fcoe_netdev(lport
);
944 if (netdev
->netdev_ops
->ndo_fcoe_ddp_done
)
945 return netdev
->netdev_ops
->ndo_fcoe_ddp_done(netdev
, xid
);
950 * fcoe_if_create() - Create a FCoE instance on an interface
951 * @fcoe: The FCoE interface to create a local port on
952 * @parent: The device pointer to be the parent in sysfs for the SCSI host
953 * @npiv: Indicates if the port is a vport or not
955 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
957 * Returns: The allocated fc_lport or an error pointer
959 static struct fc_lport
*fcoe_if_create(struct fcoe_interface
*fcoe
,
960 struct device
*parent
, int npiv
)
962 struct net_device
*netdev
= fcoe
->netdev
;
963 struct fc_lport
*lport
, *n_port
;
964 struct fcoe_port
*port
;
965 struct Scsi_Host
*shost
;
968 * parent is only a vport if npiv is 1,
969 * but we'll only use vport in that case so go ahead and set it
971 struct fc_vport
*vport
= dev_to_vport(parent
);
973 FCOE_NETDEV_DBG(netdev
, "Create Interface\n");
976 lport
= libfc_host_alloc(&fcoe_shost_template
, sizeof(*port
));
978 lport
= libfc_vport_create(vport
, sizeof(*port
));
981 FCOE_NETDEV_DBG(netdev
, "Could not allocate host structure\n");
985 port
= lport_priv(lport
);
988 port
->max_queue_depth
= FCOE_MAX_QUEUE_DEPTH
;
989 port
->min_queue_depth
= FCOE_MIN_QUEUE_DEPTH
;
990 INIT_WORK(&port
->destroy_work
, fcoe_destroy_work
);
992 /* configure a fc_lport including the exchange manager */
993 rc
= fcoe_lport_config(lport
);
995 FCOE_NETDEV_DBG(netdev
, "Could not configure lport for the "
1001 FCOE_NETDEV_DBG(netdev
, "Setting vport names, "
1002 "%16.16llx %16.16llx\n",
1003 vport
->node_name
, vport
->port_name
);
1004 fc_set_wwnn(lport
, vport
->node_name
);
1005 fc_set_wwpn(lport
, vport
->port_name
);
1008 /* configure lport network properties */
1009 rc
= fcoe_netdev_config(lport
, netdev
);
1011 FCOE_NETDEV_DBG(netdev
, "Could not configure netdev for the "
1013 goto out_lp_destroy
;
1016 /* configure lport scsi host properties */
1017 rc
= fcoe_shost_config(lport
, parent
);
1019 FCOE_NETDEV_DBG(netdev
, "Could not configure shost for the "
1021 goto out_lp_destroy
;
1024 /* Initialize the library */
1025 rc
= fcoe_libfc_config(lport
, &fcoe
->ctlr
, &fcoe_libfc_fcn_templ
, 1);
1027 FCOE_NETDEV_DBG(netdev
, "Could not configure libfc for the "
1029 goto out_lp_destroy
;
1033 * fcoe_em_alloc() and fcoe_hostlist_add() both
1034 * need to be atomic with respect to other changes to the
1035 * hostlist since fcoe_em_alloc() looks for an existing EM
1036 * instance on host list updated by fcoe_hostlist_add().
1038 * This is currently handled through the fcoe_config_mutex
1042 /* lport exch manager allocation */
1043 rc
= fcoe_em_config(lport
);
1045 shost
= vport_to_shost(vport
);
1046 n_port
= shost_priv(shost
);
1047 rc
= fc_exch_mgr_list_clone(n_port
, lport
);
1051 FCOE_NETDEV_DBG(netdev
, "Could not configure the EM\n");
1052 goto out_lp_destroy
;
1055 fcoe_interface_get(fcoe
);
1059 fc_exch_mgr_free(lport
);
1061 scsi_host_put(lport
->host
);
1067 * fcoe_if_init() - Initialization routine for fcoe.ko
1069 * Attaches the SW FCoE transport to the FC transport
1071 * Returns: 0 on success
1073 static int __init
fcoe_if_init(void)
1075 /* attach to scsi transport */
1076 fcoe_nport_scsi_transport
=
1077 fc_attach_transport(&fcoe_nport_fc_functions
);
1078 fcoe_vport_scsi_transport
=
1079 fc_attach_transport(&fcoe_vport_fc_functions
);
1081 if (!fcoe_nport_scsi_transport
) {
1082 printk(KERN_ERR
"fcoe: Failed to attach to the FC transport\n");
1090 * fcoe_if_exit() - Tear down fcoe.ko
1092 * Detaches the SW FCoE transport from the FC transport
1094 * Returns: 0 on success
1096 int __exit
fcoe_if_exit(void)
1098 fc_release_transport(fcoe_nport_scsi_transport
);
1099 fc_release_transport(fcoe_vport_scsi_transport
);
1100 fcoe_nport_scsi_transport
= NULL
;
1101 fcoe_vport_scsi_transport
= NULL
;
1106 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1107 * @cpu: The CPU index of the CPU to create a receive thread for
1109 static void fcoe_percpu_thread_create(unsigned int cpu
)
1111 struct fcoe_percpu_s
*p
;
1112 struct task_struct
*thread
;
1114 p
= &per_cpu(fcoe_percpu
, cpu
);
1116 thread
= kthread_create_on_node(fcoe_percpu_receive_thread
,
1117 (void *)p
, cpu_to_node(cpu
),
1118 "fcoethread/%d", cpu
);
1120 if (likely(!IS_ERR(thread
))) {
1121 kthread_bind(thread
, cpu
);
1122 wake_up_process(thread
);
1124 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1126 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1131 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1132 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1134 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1135 * current CPU's Rx thread. If the thread being destroyed is bound to
1136 * the CPU processing this context the skbs will be freed.
1138 static void fcoe_percpu_thread_destroy(unsigned int cpu
)
1140 struct fcoe_percpu_s
*p
;
1141 struct task_struct
*thread
;
1142 struct page
*crc_eof
;
1143 struct sk_buff
*skb
;
1145 struct fcoe_percpu_s
*p0
;
1146 unsigned targ_cpu
= get_cpu();
1147 #endif /* CONFIG_SMP */
1149 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu
);
1151 /* Prevent any new skbs from being queued for this CPU. */
1152 p
= &per_cpu(fcoe_percpu
, cpu
);
1153 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1156 crc_eof
= p
->crc_eof_page
;
1157 p
->crc_eof_page
= NULL
;
1158 p
->crc_eof_offset
= 0;
1159 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1163 * Don't bother moving the skb's if this context is running
1164 * on the same CPU that is having its thread destroyed. This
1165 * can easily happen when the module is removed.
1167 if (cpu
!= targ_cpu
) {
1168 p0
= &per_cpu(fcoe_percpu
, targ_cpu
);
1169 spin_lock_bh(&p0
->fcoe_rx_list
.lock
);
1171 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1174 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1175 __skb_queue_tail(&p0
->fcoe_rx_list
, skb
);
1176 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1179 * The targeted CPU is not initialized and cannot accept
1180 * new skbs. Unlock the targeted CPU and drop the skbs
1181 * on the CPU that is going offline.
1183 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1185 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1189 * This scenario occurs when the module is being removed
1190 * and all threads are being destroyed. skbs will continue
1191 * to be shifted from the CPU thread that is being removed
1192 * to the CPU thread associated with the CPU that is processing
1193 * the module removal. Once there is only one CPU Rx thread it
1194 * will reach this case and we will drop all skbs and later
1197 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1198 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1200 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1205 * This a non-SMP scenario where the singular Rx thread is
1206 * being removed. Free all skbs and stop the thread.
1208 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1209 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1211 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1215 kthread_stop(thread
);
1222 * fcoe_cpu_callback() - Handler for CPU hotplug events
1223 * @nfb: The callback data block
1224 * @action: The event triggering the callback
1225 * @hcpu: The index of the CPU that the event is for
1227 * This creates or destroys per-CPU data for fcoe
1229 * Returns NOTIFY_OK always.
1231 static int fcoe_cpu_callback(struct notifier_block
*nfb
,
1232 unsigned long action
, void *hcpu
)
1234 unsigned cpu
= (unsigned long)hcpu
;
1238 case CPU_ONLINE_FROZEN
:
1239 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu
);
1240 fcoe_percpu_thread_create(cpu
);
1243 case CPU_DEAD_FROZEN
:
1244 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu
);
1245 fcoe_percpu_thread_destroy(cpu
);
1254 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1257 * This routine selects next CPU based on cpumask to distribute
1258 * incoming requests in round robin.
1260 * Returns: int CPU number
1262 static inline unsigned int fcoe_select_cpu(void)
1264 static unsigned int selected_cpu
;
1266 selected_cpu
= cpumask_next(selected_cpu
, cpu_online_mask
);
1267 if (selected_cpu
>= nr_cpu_ids
)
1268 selected_cpu
= cpumask_first(cpu_online_mask
);
1270 return selected_cpu
;
1274 * fcoe_rcv() - Receive packets from a net device
1275 * @skb: The received packet
1276 * @netdev: The net device that the packet was received on
1277 * @ptype: The packet type context
1278 * @olddev: The last device net device
1280 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1281 * FC frame and passes the frame to libfc.
1283 * Returns: 0 for success
1285 int fcoe_rcv(struct sk_buff
*skb
, struct net_device
*netdev
,
1286 struct packet_type
*ptype
, struct net_device
*olddev
)
1288 struct fc_lport
*lport
;
1289 struct fcoe_rcv_info
*fr
;
1290 struct fcoe_interface
*fcoe
;
1291 struct fc_frame_header
*fh
;
1292 struct fcoe_percpu_s
*fps
;
1296 fcoe
= container_of(ptype
, struct fcoe_interface
, fcoe_packet_type
);
1297 lport
= fcoe
->ctlr
.lp
;
1298 if (unlikely(!lport
)) {
1299 FCOE_NETDEV_DBG(netdev
, "Cannot find hba structure");
1302 if (!lport
->link_up
)
1305 FCOE_NETDEV_DBG(netdev
, "skb_info: len:%d data_len:%d head:%p "
1306 "data:%p tail:%p end:%p sum:%d dev:%s",
1307 skb
->len
, skb
->data_len
, skb
->head
, skb
->data
,
1308 skb_tail_pointer(skb
), skb_end_pointer(skb
),
1309 skb
->csum
, skb
->dev
? skb
->dev
->name
: "<NULL>");
1313 if (is_fip_mode(&fcoe
->ctlr
) &&
1314 compare_ether_addr(eh
->h_source
, fcoe
->ctlr
.dest_addr
)) {
1315 FCOE_NETDEV_DBG(netdev
, "wrong source mac address:%pM\n",
1321 * Check for minimum frame length, and make sure required FCoE
1322 * and FC headers are pulled into the linear data area.
1324 if (unlikely((skb
->len
< FCOE_MIN_FRAME
) ||
1325 !pskb_may_pull(skb
, FCOE_HEADER_LEN
)))
1328 skb_set_transport_header(skb
, sizeof(struct fcoe_hdr
));
1329 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1331 if (ntoh24(&eh
->h_dest
[3]) != ntoh24(fh
->fh_d_id
)) {
1332 FCOE_NETDEV_DBG(netdev
, "FC frame d_id mismatch with MAC:%pM\n",
1337 fr
= fcoe_dev_from_skb(skb
);
1341 * In case the incoming frame's exchange is originated from
1342 * the initiator, then received frame's exchange id is ANDed
1343 * with fc_cpu_mask bits to get the same cpu on which exchange
1344 * was originated, otherwise select cpu using rx exchange id
1345 * or fcoe_select_cpu().
1347 if (ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)
1348 cpu
= ntohs(fh
->fh_ox_id
) & fc_cpu_mask
;
1350 if (ntohs(fh
->fh_rx_id
) == FC_XID_UNKNOWN
)
1351 cpu
= fcoe_select_cpu();
1353 cpu
= ntohs(fh
->fh_rx_id
) & fc_cpu_mask
;
1356 if (cpu
>= nr_cpu_ids
)
1359 fps
= &per_cpu(fcoe_percpu
, cpu
);
1360 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1361 if (unlikely(!fps
->thread
)) {
1363 * The targeted CPU is not ready, let's target
1364 * the first CPU now. For non-SMP systems this
1365 * will check the same CPU twice.
1367 FCOE_NETDEV_DBG(netdev
, "CPU is online, but no receive thread "
1368 "ready for incoming skb- using first online "
1371 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1372 cpu
= cpumask_first(cpu_online_mask
);
1373 fps
= &per_cpu(fcoe_percpu
, cpu
);
1374 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1376 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1382 * We now have a valid CPU that we're targeting for
1383 * this skb. We also have this receive thread locked,
1384 * so we're free to queue skbs into it's queue.
1387 /* If this is a SCSI-FCP frame, and this is already executing on the
1388 * correct CPU, and the queue for this CPU is empty, then go ahead
1389 * and process the frame directly in the softirq context.
1390 * This lets us process completions without context switching from the
1391 * NET_RX softirq, to our receive processing thread, and then back to
1392 * BLOCK softirq context.
1394 if (fh
->fh_type
== FC_TYPE_FCP
&&
1395 cpu
== smp_processor_id() &&
1396 skb_queue_empty(&fps
->fcoe_rx_list
)) {
1397 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1398 fcoe_recv_frame(skb
);
1400 __skb_queue_tail(&fps
->fcoe_rx_list
, skb
);
1401 if (fps
->fcoe_rx_list
.qlen
== 1)
1402 wake_up_process(fps
->thread
);
1403 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1408 per_cpu_ptr(lport
->dev_stats
, get_cpu())->ErrorFrames
++;
1416 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1417 * @skb: The packet to be transmitted
1418 * @tlen: The total length of the trailer
1420 * Returns: 0 for success
1422 static int fcoe_alloc_paged_crc_eof(struct sk_buff
*skb
, int tlen
)
1424 struct fcoe_percpu_s
*fps
;
1427 fps
= &get_cpu_var(fcoe_percpu
);
1428 rc
= fcoe_get_paged_crc_eof(skb
, tlen
, fps
);
1429 put_cpu_var(fcoe_percpu
);
1435 * fcoe_xmit() - Transmit a FCoE frame
1436 * @lport: The local port that the frame is to be transmitted for
1437 * @fp: The frame to be transmitted
1439 * Return: 0 for success
1441 int fcoe_xmit(struct fc_lport
*lport
, struct fc_frame
*fp
)
1446 struct fcoe_crc_eof
*cp
;
1447 struct sk_buff
*skb
;
1448 struct fcoe_dev_stats
*stats
;
1449 struct fc_frame_header
*fh
;
1450 unsigned int hlen
; /* header length implies the version */
1451 unsigned int tlen
; /* trailer length */
1452 unsigned int elen
; /* eth header, may include vlan */
1453 struct fcoe_port
*port
= lport_priv(lport
);
1454 struct fcoe_interface
*fcoe
= port
->priv
;
1456 struct fcoe_hdr
*hp
;
1458 WARN_ON((fr_len(fp
) % sizeof(u32
)) != 0);
1460 fh
= fc_frame_header_get(fp
);
1462 wlen
= skb
->len
/ FCOE_WORD_TO_BYTE
;
1464 if (!lport
->link_up
) {
1469 if (unlikely(fh
->fh_type
== FC_TYPE_ELS
) &&
1470 fcoe_ctlr_els_send(&fcoe
->ctlr
, lport
, skb
))
1476 elen
= sizeof(struct ethhdr
);
1477 hlen
= sizeof(struct fcoe_hdr
);
1478 tlen
= sizeof(struct fcoe_crc_eof
);
1479 wlen
= (skb
->len
- tlen
+ sizeof(crc
)) / FCOE_WORD_TO_BYTE
;
1482 if (likely(lport
->crc_offload
)) {
1483 skb
->ip_summed
= CHECKSUM_PARTIAL
;
1484 skb
->csum_start
= skb_headroom(skb
);
1485 skb
->csum_offset
= skb
->len
;
1488 skb
->ip_summed
= CHECKSUM_NONE
;
1489 crc
= fcoe_fc_crc(fp
);
1492 /* copy port crc and eof to the skb buff */
1493 if (skb_is_nonlinear(skb
)) {
1495 if (fcoe_alloc_paged_crc_eof(skb
, tlen
)) {
1499 frag
= &skb_shinfo(skb
)->frags
[skb_shinfo(skb
)->nr_frags
- 1];
1500 cp
= kmap_atomic(frag
->page
, KM_SKB_DATA_SOFTIRQ
)
1501 + frag
->page_offset
;
1503 cp
= (struct fcoe_crc_eof
*)skb_put(skb
, tlen
);
1506 memset(cp
, 0, sizeof(*cp
));
1508 cp
->fcoe_crc32
= cpu_to_le32(~crc
);
1510 if (skb_is_nonlinear(skb
)) {
1511 kunmap_atomic(cp
, KM_SKB_DATA_SOFTIRQ
);
1515 /* adjust skb network/transport offsets to match mac/fcoe/port */
1516 skb_push(skb
, elen
+ hlen
);
1517 skb_reset_mac_header(skb
);
1518 skb_reset_network_header(skb
);
1519 skb
->mac_len
= elen
;
1520 skb
->protocol
= htons(ETH_P_FCOE
);
1521 skb
->dev
= fcoe
->netdev
;
1523 /* fill up mac and fcoe headers */
1525 eh
->h_proto
= htons(ETH_P_FCOE
);
1526 memcpy(eh
->h_dest
, fcoe
->ctlr
.dest_addr
, ETH_ALEN
);
1527 if (fcoe
->ctlr
.map_dest
)
1528 memcpy(eh
->h_dest
+ 3, fh
->fh_d_id
, 3);
1530 if (unlikely(fcoe
->ctlr
.flogi_oxid
!= FC_XID_UNKNOWN
))
1531 memcpy(eh
->h_source
, fcoe
->ctlr
.ctl_src_addr
, ETH_ALEN
);
1533 memcpy(eh
->h_source
, port
->data_src_addr
, ETH_ALEN
);
1535 hp
= (struct fcoe_hdr
*)(eh
+ 1);
1536 memset(hp
, 0, sizeof(*hp
));
1538 FC_FCOE_ENCAPS_VER(hp
, FC_FCOE_VER
);
1541 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1542 if (lport
->seq_offload
&& fr_max_payload(fp
)) {
1543 skb_shinfo(skb
)->gso_type
= SKB_GSO_FCOE
;
1544 skb_shinfo(skb
)->gso_size
= fr_max_payload(fp
);
1546 skb_shinfo(skb
)->gso_type
= 0;
1547 skb_shinfo(skb
)->gso_size
= 0;
1549 /* update tx stats: regardless if LLD fails */
1550 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1552 stats
->TxWords
+= wlen
;
1555 /* send down to lld */
1557 fcoe_port_send(port
, skb
);
1562 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1563 * @skb: The completed skb (argument required by destructor)
1565 static void fcoe_percpu_flush_done(struct sk_buff
*skb
)
1567 complete(&fcoe_flush_completion
);
1571 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1572 * @lport: The local port the frame was received on
1573 * @fp: The received frame
1575 * Return: 0 on passing filtering checks
1577 static inline int fcoe_filter_frames(struct fc_lport
*lport
,
1578 struct fc_frame
*fp
)
1580 struct fcoe_interface
*fcoe
;
1581 struct fc_frame_header
*fh
;
1582 struct sk_buff
*skb
= (struct sk_buff
*)fp
;
1583 struct fcoe_dev_stats
*stats
;
1586 * We only check CRC if no offload is available and if it is
1587 * it's solicited data, in which case, the FCP layer would
1588 * check it during the copy.
1590 if (lport
->crc_offload
&& skb
->ip_summed
== CHECKSUM_UNNECESSARY
)
1591 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1593 fr_flags(fp
) |= FCPHF_CRC_UNCHECKED
;
1595 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1596 fh
= fc_frame_header_get(fp
);
1597 if (fh
->fh_r_ctl
== FC_RCTL_DD_SOL_DATA
&& fh
->fh_type
== FC_TYPE_FCP
)
1600 fcoe
= ((struct fcoe_port
*)lport_priv(lport
))->priv
;
1601 if (is_fip_mode(&fcoe
->ctlr
) && fc_frame_payload_op(fp
) == ELS_LOGO
&&
1602 ntoh24(fh
->fh_s_id
) == FC_FID_FLOGI
) {
1603 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1607 if (!(fr_flags(fp
) & FCPHF_CRC_UNCHECKED
) ||
1608 le32_to_cpu(fr_crc(fp
)) == ~crc32(~0, skb
->data
, skb
->len
)) {
1609 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1613 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1614 stats
->InvalidCRCCount
++;
1615 if (stats
->InvalidCRCCount
< 5)
1616 printk(KERN_WARNING
"fcoe: dropping frame with CRC error\n");
1621 * fcoe_recv_frame() - process a single received frame
1622 * @skb: frame to process
1624 static void fcoe_recv_frame(struct sk_buff
*skb
)
1627 struct fc_lport
*lport
;
1628 struct fcoe_rcv_info
*fr
;
1629 struct fcoe_dev_stats
*stats
;
1630 struct fcoe_crc_eof crc_eof
;
1631 struct fc_frame
*fp
;
1632 struct fcoe_port
*port
;
1633 struct fcoe_hdr
*hp
;
1635 fr
= fcoe_dev_from_skb(skb
);
1637 if (unlikely(!lport
)) {
1638 if (skb
->destructor
!= fcoe_percpu_flush_done
)
1639 FCOE_NETDEV_DBG(skb
->dev
, "NULL lport in skb");
1644 FCOE_NETDEV_DBG(skb
->dev
, "skb_info: len:%d data_len:%d "
1645 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1646 skb
->len
, skb
->data_len
,
1647 skb
->head
, skb
->data
, skb_tail_pointer(skb
),
1648 skb_end_pointer(skb
), skb
->csum
,
1649 skb
->dev
? skb
->dev
->name
: "<NULL>");
1651 port
= lport_priv(lport
);
1652 if (skb_is_nonlinear(skb
))
1653 skb_linearize(skb
); /* not ideal */
1656 * Frame length checks and setting up the header pointers
1657 * was done in fcoe_rcv already.
1659 hp
= (struct fcoe_hdr
*) skb_network_header(skb
);
1661 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1662 if (unlikely(FC_FCOE_DECAPS_VER(hp
) != FC_FCOE_VER
)) {
1663 if (stats
->ErrorFrames
< 5)
1664 printk(KERN_WARNING
"fcoe: FCoE version "
1665 "mismatch: The frame has "
1666 "version %x, but the "
1667 "initiator supports version "
1668 "%x\n", FC_FCOE_DECAPS_VER(hp
),
1673 skb_pull(skb
, sizeof(struct fcoe_hdr
));
1674 fr_len
= skb
->len
- sizeof(struct fcoe_crc_eof
);
1677 stats
->RxWords
+= fr_len
/ FCOE_WORD_TO_BYTE
;
1679 fp
= (struct fc_frame
*)skb
;
1682 fr_sof(fp
) = hp
->fcoe_sof
;
1684 /* Copy out the CRC and EOF trailer for access */
1685 if (skb_copy_bits(skb
, fr_len
, &crc_eof
, sizeof(crc_eof
)))
1687 fr_eof(fp
) = crc_eof
.fcoe_eof
;
1688 fr_crc(fp
) = crc_eof
.fcoe_crc32
;
1689 if (pskb_trim(skb
, fr_len
))
1692 if (!fcoe_filter_frames(lport
, fp
)) {
1694 fc_exch_recv(lport
, fp
);
1698 stats
->ErrorFrames
++;
1704 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1705 * @arg: The per-CPU context
1707 * Return: 0 for success
1709 int fcoe_percpu_receive_thread(void *arg
)
1711 struct fcoe_percpu_s
*p
= arg
;
1712 struct sk_buff
*skb
;
1714 set_user_nice(current
, -20);
1716 while (!kthread_should_stop()) {
1718 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1719 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) == NULL
) {
1720 set_current_state(TASK_INTERRUPTIBLE
);
1721 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1723 set_current_state(TASK_RUNNING
);
1724 if (kthread_should_stop())
1726 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1728 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1729 fcoe_recv_frame(skb
);
1735 * fcoe_dev_setup() - Setup the link change notification interface
1737 static void fcoe_dev_setup(void)
1739 register_netdevice_notifier(&fcoe_notifier
);
1743 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1745 static void fcoe_dev_cleanup(void)
1747 unregister_netdevice_notifier(&fcoe_notifier
);
1751 * fcoe_device_notification() - Handler for net device events
1752 * @notifier: The context of the notification
1753 * @event: The type of event
1754 * @ptr: The net device that the event was on
1756 * This function is called by the Ethernet driver in case of link change event.
1758 * Returns: 0 for success
1760 static int fcoe_device_notification(struct notifier_block
*notifier
,
1761 ulong event
, void *ptr
)
1763 struct fc_lport
*lport
= NULL
;
1764 struct net_device
*netdev
= ptr
;
1765 struct fcoe_interface
*fcoe
;
1766 struct fcoe_port
*port
;
1767 struct fcoe_dev_stats
*stats
;
1768 u32 link_possible
= 1;
1772 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
1773 if (fcoe
->netdev
== netdev
) {
1774 lport
= fcoe
->ctlr
.lp
;
1785 case NETDEV_GOING_DOWN
:
1791 case NETDEV_CHANGEMTU
:
1792 if (netdev
->features
& NETIF_F_FCOE_MTU
)
1794 mfs
= netdev
->mtu
- (sizeof(struct fcoe_hdr
) +
1795 sizeof(struct fcoe_crc_eof
));
1796 if (mfs
>= FC_MIN_MAX_FRAME
)
1797 fc_set_mfs(lport
, mfs
);
1799 case NETDEV_REGISTER
:
1801 case NETDEV_UNREGISTER
:
1802 list_del(&fcoe
->list
);
1803 port
= lport_priv(fcoe
->ctlr
.lp
);
1804 queue_work(fcoe_wq
, &port
->destroy_work
);
1807 case NETDEV_FEAT_CHANGE
:
1808 fcoe_netdev_features_change(lport
, netdev
);
1811 FCOE_NETDEV_DBG(netdev
, "Unknown event %ld "
1812 "from netdev netlink\n", event
);
1815 fcoe_link_speed_update(lport
);
1817 if (link_possible
&& !fcoe_link_ok(lport
))
1818 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1819 else if (fcoe_ctlr_link_down(&fcoe
->ctlr
)) {
1820 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1821 stats
->LinkFailureCount
++;
1823 fcoe_clean_pending_queue(lport
);
1830 * fcoe_disable() - Disables a FCoE interface
1831 * @netdev : The net_device object the Ethernet interface to create on
1833 * Called from fcoe transport.
1835 * Returns: 0 for success
1837 static int fcoe_disable(struct net_device
*netdev
)
1839 struct fcoe_interface
*fcoe
;
1842 mutex_lock(&fcoe_config_mutex
);
1845 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1849 fcoe_ctlr_link_down(&fcoe
->ctlr
);
1850 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
1854 mutex_unlock(&fcoe_config_mutex
);
1859 * fcoe_enable() - Enables a FCoE interface
1860 * @netdev : The net_device object the Ethernet interface to create on
1862 * Called from fcoe transport.
1864 * Returns: 0 for success
1866 static int fcoe_enable(struct net_device
*netdev
)
1868 struct fcoe_interface
*fcoe
;
1871 mutex_lock(&fcoe_config_mutex
);
1873 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1878 else if (!fcoe_link_ok(fcoe
->ctlr
.lp
))
1879 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1881 mutex_unlock(&fcoe_config_mutex
);
1886 * fcoe_destroy() - Destroy a FCoE interface
1887 * @netdev : The net_device object the Ethernet interface to create on
1889 * Called from fcoe transport
1891 * Returns: 0 for success
1893 static int fcoe_destroy(struct net_device
*netdev
)
1895 struct fcoe_interface
*fcoe
;
1896 struct fc_lport
*lport
;
1897 struct fcoe_port
*port
;
1900 mutex_lock(&fcoe_config_mutex
);
1902 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1907 lport
= fcoe
->ctlr
.lp
;
1908 port
= lport_priv(lport
);
1909 list_del(&fcoe
->list
);
1910 queue_work(fcoe_wq
, &port
->destroy_work
);
1913 mutex_unlock(&fcoe_config_mutex
);
1918 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1919 * @work: Handle to the FCoE port to be destroyed
1921 static void fcoe_destroy_work(struct work_struct
*work
)
1923 struct fcoe_port
*port
;
1924 struct fcoe_interface
*fcoe
;
1927 port
= container_of(work
, struct fcoe_port
, destroy_work
);
1928 mutex_lock(&fcoe_config_mutex
);
1930 /* set if this is an NPIV port */
1931 npiv
= port
->lport
->vport
? 1 : 0;
1934 fcoe_if_destroy(port
->lport
);
1936 /* Do not tear down the fcoe interface for NPIV port */
1939 fcoe_interface_cleanup(fcoe
);
1943 mutex_unlock(&fcoe_config_mutex
);
1947 * fcoe_match() - Check if the FCoE is supported on the given netdevice
1948 * @netdev : The net_device object the Ethernet interface to create on
1950 * Called from fcoe transport.
1952 * Returns: always returns true as this is the default FCoE transport,
1953 * i.e., support all netdevs.
1955 static bool fcoe_match(struct net_device
*netdev
)
1961 * fcoe_create() - Create a fcoe interface
1962 * @netdev : The net_device object the Ethernet interface to create on
1963 * @fip_mode: The FIP mode for this creation
1965 * Called from fcoe transport
1967 * Returns: 0 for success
1969 static int fcoe_create(struct net_device
*netdev
, enum fip_state fip_mode
)
1972 struct fcoe_interface
*fcoe
;
1973 struct fc_lport
*lport
;
1975 mutex_lock(&fcoe_config_mutex
);
1978 /* look for existing lport */
1979 if (fcoe_hostlist_lookup(netdev
)) {
1984 fcoe
= fcoe_interface_create(netdev
, fip_mode
);
1990 lport
= fcoe_if_create(fcoe
, &netdev
->dev
, 0);
1991 if (IS_ERR(lport
)) {
1992 printk(KERN_ERR
"fcoe: Failed to create interface (%s)\n",
1995 fcoe_interface_cleanup(fcoe
);
1999 /* Make this the "master" N_Port */
2000 fcoe
->ctlr
.lp
= lport
;
2002 /* add to lports list */
2003 fcoe_hostlist_add(lport
);
2005 /* start FIP Discovery and FLOGI */
2006 lport
->boot_time
= jiffies
;
2007 fc_fabric_login(lport
);
2008 if (!fcoe_link_ok(lport
))
2009 fcoe_ctlr_link_up(&fcoe
->ctlr
);
2013 mutex_unlock(&fcoe_config_mutex
);
2018 * fcoe_link_speed_update() - Update the supported and actual link speeds
2019 * @lport: The local port to update speeds for
2021 * Returns: 0 if the ethtool query was successful
2022 * -1 if the ethtool query failed
2024 int fcoe_link_speed_update(struct fc_lport
*lport
)
2026 struct net_device
*netdev
= fcoe_netdev(lport
);
2027 struct ethtool_cmd ecmd
;
2029 if (!dev_ethtool_get_settings(netdev
, &ecmd
)) {
2030 lport
->link_supported_speeds
&=
2031 ~(FC_PORTSPEED_1GBIT
| FC_PORTSPEED_10GBIT
);
2032 if (ecmd
.supported
& (SUPPORTED_1000baseT_Half
|
2033 SUPPORTED_1000baseT_Full
))
2034 lport
->link_supported_speeds
|= FC_PORTSPEED_1GBIT
;
2035 if (ecmd
.supported
& SUPPORTED_10000baseT_Full
)
2036 lport
->link_supported_speeds
|=
2037 FC_PORTSPEED_10GBIT
;
2038 switch (ethtool_cmd_speed(&ecmd
)) {
2040 lport
->link_speed
= FC_PORTSPEED_1GBIT
;
2043 lport
->link_speed
= FC_PORTSPEED_10GBIT
;
2052 * fcoe_link_ok() - Check if the link is OK for a local port
2053 * @lport: The local port to check link on
2055 * Returns: 0 if link is UP and OK, -1 if not
2058 int fcoe_link_ok(struct fc_lport
*lport
)
2060 struct net_device
*netdev
= fcoe_netdev(lport
);
2062 if (netif_oper_up(netdev
))
2068 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2069 * @lport: The local port whose skbs are to be cleared
2071 * Must be called with fcoe_create_mutex held to single-thread completion.
2073 * This flushes the pending skbs by adding a new skb to each queue and
2074 * waiting until they are all freed. This assures us that not only are
2075 * there no packets that will be handled by the lport, but also that any
2076 * threads already handling packet have returned.
2078 void fcoe_percpu_clean(struct fc_lport
*lport
)
2080 struct fcoe_percpu_s
*pp
;
2081 struct fcoe_rcv_info
*fr
;
2082 struct sk_buff_head
*list
;
2083 struct sk_buff
*skb
, *next
;
2084 struct sk_buff
*head
;
2087 for_each_possible_cpu(cpu
) {
2088 pp
= &per_cpu(fcoe_percpu
, cpu
);
2089 spin_lock_bh(&pp
->fcoe_rx_list
.lock
);
2090 list
= &pp
->fcoe_rx_list
;
2092 for (skb
= head
; skb
!= (struct sk_buff
*)list
;
2095 fr
= fcoe_dev_from_skb(skb
);
2096 if (fr
->fr_dev
== lport
) {
2097 __skb_unlink(skb
, list
);
2102 if (!pp
->thread
|| !cpu_online(cpu
)) {
2103 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2107 skb
= dev_alloc_skb(0);
2109 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2112 skb
->destructor
= fcoe_percpu_flush_done
;
2114 __skb_queue_tail(&pp
->fcoe_rx_list
, skb
);
2115 if (pp
->fcoe_rx_list
.qlen
== 1)
2116 wake_up_process(pp
->thread
);
2117 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2119 wait_for_completion(&fcoe_flush_completion
);
2124 * fcoe_reset() - Reset a local port
2125 * @shost: The SCSI host associated with the local port to be reset
2127 * Returns: Always 0 (return value required by FC transport template)
2129 int fcoe_reset(struct Scsi_Host
*shost
)
2131 struct fc_lport
*lport
= shost_priv(shost
);
2132 struct fcoe_port
*port
= lport_priv(lport
);
2133 struct fcoe_interface
*fcoe
= port
->priv
;
2135 fcoe_ctlr_link_down(&fcoe
->ctlr
);
2136 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
2137 if (!fcoe_link_ok(fcoe
->ctlr
.lp
))
2138 fcoe_ctlr_link_up(&fcoe
->ctlr
);
2143 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2144 * @netdev: The net device used as a key
2146 * Locking: Must be called with the RNL mutex held.
2148 * Returns: NULL or the FCoE interface
2150 static struct fcoe_interface
*
2151 fcoe_hostlist_lookup_port(const struct net_device
*netdev
)
2153 struct fcoe_interface
*fcoe
;
2155 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
2156 if (fcoe
->netdev
== netdev
)
2163 * fcoe_hostlist_lookup() - Find the local port associated with a
2165 * @netdev: The netdevice used as a key
2167 * Locking: Must be called with the RTNL mutex held
2169 * Returns: NULL or the local port
2171 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*netdev
)
2173 struct fcoe_interface
*fcoe
;
2175 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2176 return (fcoe
) ? fcoe
->ctlr
.lp
: NULL
;
2180 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2181 * port to the hostlist
2182 * @lport: The local port that identifies the FCoE interface to be added
2184 * Locking: must be called with the RTNL mutex held
2186 * Returns: 0 for success
2188 static int fcoe_hostlist_add(const struct fc_lport
*lport
)
2190 struct fcoe_interface
*fcoe
;
2191 struct fcoe_port
*port
;
2193 fcoe
= fcoe_hostlist_lookup_port(fcoe_netdev(lport
));
2195 port
= lport_priv(lport
);
2197 list_add_tail(&fcoe
->list
, &fcoe_hostlist
);
2203 static struct fcoe_transport fcoe_sw_transport
= {
2204 .name
= {FCOE_TRANSPORT_DEFAULT
},
2206 .list
= LIST_HEAD_INIT(fcoe_sw_transport
.list
),
2207 .match
= fcoe_match
,
2208 .create
= fcoe_create
,
2209 .destroy
= fcoe_destroy
,
2210 .enable
= fcoe_enable
,
2211 .disable
= fcoe_disable
,
2215 * fcoe_init() - Initialize fcoe.ko
2217 * Returns: 0 on success, or a negative value on failure
2219 static int __init
fcoe_init(void)
2221 struct fcoe_percpu_s
*p
;
2225 fcoe_wq
= alloc_workqueue("fcoe", 0, 0);
2229 /* register as a fcoe transport */
2230 rc
= fcoe_transport_attach(&fcoe_sw_transport
);
2232 printk(KERN_ERR
"failed to register an fcoe transport, check "
2233 "if libfcoe is loaded\n");
2237 mutex_lock(&fcoe_config_mutex
);
2239 for_each_possible_cpu(cpu
) {
2240 p
= &per_cpu(fcoe_percpu
, cpu
);
2241 skb_queue_head_init(&p
->fcoe_rx_list
);
2244 for_each_online_cpu(cpu
)
2245 fcoe_percpu_thread_create(cpu
);
2247 /* Initialize per CPU interrupt thread */
2248 rc
= register_hotcpu_notifier(&fcoe_cpu_notifier
);
2252 /* Setup link change notification */
2255 rc
= fcoe_if_init();
2259 mutex_unlock(&fcoe_config_mutex
);
2263 for_each_online_cpu(cpu
) {
2264 fcoe_percpu_thread_destroy(cpu
);
2266 mutex_unlock(&fcoe_config_mutex
);
2267 destroy_workqueue(fcoe_wq
);
2270 module_init(fcoe_init
);
2273 * fcoe_exit() - Clean up fcoe.ko
2275 * Returns: 0 on success or a negative value on failure
2277 static void __exit
fcoe_exit(void)
2279 struct fcoe_interface
*fcoe
, *tmp
;
2280 struct fcoe_port
*port
;
2283 mutex_lock(&fcoe_config_mutex
);
2287 /* releases the associated fcoe hosts */
2289 list_for_each_entry_safe(fcoe
, tmp
, &fcoe_hostlist
, list
) {
2290 list_del(&fcoe
->list
);
2291 port
= lport_priv(fcoe
->ctlr
.lp
);
2292 queue_work(fcoe_wq
, &port
->destroy_work
);
2296 unregister_hotcpu_notifier(&fcoe_cpu_notifier
);
2298 for_each_online_cpu(cpu
)
2299 fcoe_percpu_thread_destroy(cpu
);
2301 mutex_unlock(&fcoe_config_mutex
);
2304 * destroy_work's may be chained but destroy_workqueue()
2305 * can take care of them. Just kill the fcoe_wq.
2307 destroy_workqueue(fcoe_wq
);
2310 * Detaching from the scsi transport must happen after all
2311 * destroys are done on the fcoe_wq. destroy_workqueue will
2312 * enusre the fcoe_wq is flushed.
2316 /* detach from fcoe transport */
2317 fcoe_transport_detach(&fcoe_sw_transport
);
2319 module_exit(fcoe_exit
);
2322 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2323 * @seq: active sequence in the FLOGI or FDISC exchange
2324 * @fp: response frame, or error encoded in a pointer (timeout)
2325 * @arg: pointer the the fcoe_ctlr structure
2327 * This handles MAC address management for FCoE, then passes control on to
2328 * the libfc FLOGI response handler.
2330 static void fcoe_flogi_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2332 struct fcoe_ctlr
*fip
= arg
;
2333 struct fc_exch
*exch
= fc_seq_exch(seq
);
2334 struct fc_lport
*lport
= exch
->lp
;
2340 mac
= fr_cb(fp
)->granted_mac
;
2341 if (is_zero_ether_addr(mac
)) {
2343 if (fcoe_ctlr_recv_flogi(fip
, lport
, fp
)) {
2348 fcoe_update_src_mac(lport
, mac
);
2350 fc_lport_flogi_resp(seq
, fp
, lport
);
2354 * fcoe_logo_resp() - FCoE specific LOGO response handler
2355 * @seq: active sequence in the LOGO exchange
2356 * @fp: response frame, or error encoded in a pointer (timeout)
2357 * @arg: pointer the the fcoe_ctlr structure
2359 * This handles MAC address management for FCoE, then passes control on to
2360 * the libfc LOGO response handler.
2362 static void fcoe_logo_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2364 struct fc_lport
*lport
= arg
;
2365 static u8 zero_mac
[ETH_ALEN
] = { 0 };
2368 fcoe_update_src_mac(lport
, zero_mac
);
2369 fc_lport_logo_resp(seq
, fp
, lport
);
2373 * fcoe_elsct_send - FCoE specific ELS handler
2375 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2376 * using FCoE specific response handlers and passing the FIP controller as
2377 * the argument (the lport is still available from the exchange).
2379 * Most of the work here is just handed off to the libfc routine.
2381 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*lport
, u32 did
,
2382 struct fc_frame
*fp
, unsigned int op
,
2383 void (*resp
)(struct fc_seq
*,
2386 void *arg
, u32 timeout
)
2388 struct fcoe_port
*port
= lport_priv(lport
);
2389 struct fcoe_interface
*fcoe
= port
->priv
;
2390 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
2391 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
2396 if (lport
->point_to_multipoint
)
2398 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_flogi_resp
,
2401 /* only hook onto fabric logouts, not port logouts */
2402 if (ntoh24(fh
->fh_d_id
) != FC_FID_FLOGI
)
2404 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_logo_resp
,
2407 return fc_elsct_send(lport
, did
, fp
, op
, resp
, arg
, timeout
);
2411 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2412 * @vport: fc_vport object to create a new fc_host for
2413 * @disabled: start the new fc_host in a disabled state by default?
2415 * Returns: 0 for success
2417 static int fcoe_vport_create(struct fc_vport
*vport
, bool disabled
)
2419 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2420 struct fc_lport
*n_port
= shost_priv(shost
);
2421 struct fcoe_port
*port
= lport_priv(n_port
);
2422 struct fcoe_interface
*fcoe
= port
->priv
;
2423 struct net_device
*netdev
= fcoe
->netdev
;
2424 struct fc_lport
*vn_port
;
2428 rc
= fcoe_validate_vport_create(vport
);
2430 fcoe_wwn_to_str(vport
->port_name
, buf
, sizeof(buf
));
2431 printk(KERN_ERR
"fcoe: Failed to create vport, "
2432 "WWPN (0x%s) already exists\n",
2437 mutex_lock(&fcoe_config_mutex
);
2438 vn_port
= fcoe_if_create(fcoe
, &vport
->dev
, 1);
2439 mutex_unlock(&fcoe_config_mutex
);
2441 if (IS_ERR(vn_port
)) {
2442 printk(KERN_ERR
"fcoe: fcoe_vport_create(%s) failed\n",
2448 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2450 vn_port
->boot_time
= jiffies
;
2451 fc_fabric_login(vn_port
);
2452 fc_vport_setlink(vn_port
);
2458 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2459 * @vport: fc_vport object that is being destroyed
2461 * Returns: 0 for success
2463 static int fcoe_vport_destroy(struct fc_vport
*vport
)
2465 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2466 struct fc_lport
*n_port
= shost_priv(shost
);
2467 struct fc_lport
*vn_port
= vport
->dd_data
;
2468 struct fcoe_port
*port
= lport_priv(vn_port
);
2470 mutex_lock(&n_port
->lp_mutex
);
2471 list_del(&vn_port
->list
);
2472 mutex_unlock(&n_port
->lp_mutex
);
2473 queue_work(fcoe_wq
, &port
->destroy_work
);
2478 * fcoe_vport_disable() - change vport state
2479 * @vport: vport to bring online/offline
2480 * @disable: should the vport be disabled?
2482 static int fcoe_vport_disable(struct fc_vport
*vport
, bool disable
)
2484 struct fc_lport
*lport
= vport
->dd_data
;
2487 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2488 fc_fabric_logoff(lport
);
2490 lport
->boot_time
= jiffies
;
2491 fc_fabric_login(lport
);
2492 fc_vport_setlink(lport
);
2499 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2500 * @vport: fc_vport with a new symbolic name string
2502 * After generating a new symbolic name string, a new RSPN_ID request is
2503 * sent to the name server. There is no response handler, so if it fails
2504 * for some reason it will not be retried.
2506 static void fcoe_set_vport_symbolic_name(struct fc_vport
*vport
)
2508 struct fc_lport
*lport
= vport
->dd_data
;
2509 struct fc_frame
*fp
;
2512 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
2513 "%s v%s over %s : %s", FCOE_NAME
, FCOE_VERSION
,
2514 fcoe_netdev(lport
)->name
, vport
->symbolic_name
);
2516 if (lport
->state
!= LPORT_ST_READY
)
2519 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
2520 fp
= fc_frame_alloc(lport
,
2521 sizeof(struct fc_ct_hdr
) +
2522 sizeof(struct fc_ns_rspn
) + len
);
2525 lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, FC_NS_RSPN_ID
,
2526 NULL
, NULL
, 3 * lport
->r_a_tov
);
2530 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2531 * @lport: the local port
2532 * @fc_lesb: the link error status block
2534 static void fcoe_get_lesb(struct fc_lport
*lport
,
2535 struct fc_els_lesb
*fc_lesb
)
2538 u32 lfc
, vlfc
, mdac
;
2539 struct fcoe_dev_stats
*devst
;
2540 struct fcoe_fc_els_lesb
*lesb
;
2541 struct rtnl_link_stats64 temp
;
2542 struct net_device
*netdev
= fcoe_netdev(lport
);
2547 lesb
= (struct fcoe_fc_els_lesb
*)fc_lesb
;
2548 memset(lesb
, 0, sizeof(*lesb
));
2549 for_each_possible_cpu(cpu
) {
2550 devst
= per_cpu_ptr(lport
->dev_stats
, cpu
);
2551 lfc
+= devst
->LinkFailureCount
;
2552 vlfc
+= devst
->VLinkFailureCount
;
2553 mdac
+= devst
->MissDiscAdvCount
;
2555 lesb
->lesb_link_fail
= htonl(lfc
);
2556 lesb
->lesb_vlink_fail
= htonl(vlfc
);
2557 lesb
->lesb_miss_fka
= htonl(mdac
);
2558 lesb
->lesb_fcs_error
= htonl(dev_get_stats(netdev
, &temp
)->rx_crc_errors
);
2562 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2563 * @lport: the local port
2564 * @port_id: the port ID
2565 * @fp: the received frame, if any, that caused the port_id to be set.
2567 * This routine handles the case where we received a FLOGI and are
2568 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2569 * so it can set the non-mapped mode and gateway address.
2571 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2573 static void fcoe_set_port_id(struct fc_lport
*lport
,
2574 u32 port_id
, struct fc_frame
*fp
)
2576 struct fcoe_port
*port
= lport_priv(lport
);
2577 struct fcoe_interface
*fcoe
= port
->priv
;
2579 if (fp
&& fc_frame_payload_op(fp
) == ELS_FLOGI
)
2580 fcoe_ctlr_recv_flogi(&fcoe
->ctlr
, lport
, fp
);