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
*);
141 static struct libfc_function_template fcoe_libfc_fcn_templ
= {
142 .frame_send
= fcoe_xmit
,
143 .ddp_setup
= fcoe_ddp_setup
,
144 .ddp_done
= fcoe_ddp_done
,
145 .elsct_send
= fcoe_elsct_send
,
146 .get_lesb
= fcoe_get_lesb
,
147 .lport_set_port_id
= fcoe_set_port_id
,
150 struct fc_function_template fcoe_nport_fc_functions
= {
151 .show_host_node_name
= 1,
152 .show_host_port_name
= 1,
153 .show_host_supported_classes
= 1,
154 .show_host_supported_fc4s
= 1,
155 .show_host_active_fc4s
= 1,
156 .show_host_maxframe_size
= 1,
158 .show_host_port_id
= 1,
159 .show_host_supported_speeds
= 1,
160 .get_host_speed
= fc_get_host_speed
,
161 .show_host_speed
= 1,
162 .show_host_port_type
= 1,
163 .get_host_port_state
= fc_get_host_port_state
,
164 .show_host_port_state
= 1,
165 .show_host_symbolic_name
= 1,
167 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
168 .show_rport_maxframe_size
= 1,
169 .show_rport_supported_classes
= 1,
171 .show_host_fabric_name
= 1,
172 .show_starget_node_name
= 1,
173 .show_starget_port_name
= 1,
174 .show_starget_port_id
= 1,
175 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
176 .show_rport_dev_loss_tmo
= 1,
177 .get_fc_host_stats
= fc_get_host_stats
,
178 .issue_fc_host_lip
= fcoe_reset
,
180 .terminate_rport_io
= fc_rport_terminate_io
,
182 .vport_create
= fcoe_vport_create
,
183 .vport_delete
= fcoe_vport_destroy
,
184 .vport_disable
= fcoe_vport_disable
,
185 .set_vport_symbolic_name
= fcoe_set_vport_symbolic_name
,
187 .bsg_request
= fc_lport_bsg_request
,
190 struct fc_function_template fcoe_vport_fc_functions
= {
191 .show_host_node_name
= 1,
192 .show_host_port_name
= 1,
193 .show_host_supported_classes
= 1,
194 .show_host_supported_fc4s
= 1,
195 .show_host_active_fc4s
= 1,
196 .show_host_maxframe_size
= 1,
198 .show_host_port_id
= 1,
199 .show_host_supported_speeds
= 1,
200 .get_host_speed
= fc_get_host_speed
,
201 .show_host_speed
= 1,
202 .show_host_port_type
= 1,
203 .get_host_port_state
= fc_get_host_port_state
,
204 .show_host_port_state
= 1,
205 .show_host_symbolic_name
= 1,
207 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
208 .show_rport_maxframe_size
= 1,
209 .show_rport_supported_classes
= 1,
211 .show_host_fabric_name
= 1,
212 .show_starget_node_name
= 1,
213 .show_starget_port_name
= 1,
214 .show_starget_port_id
= 1,
215 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
216 .show_rport_dev_loss_tmo
= 1,
217 .get_fc_host_stats
= fc_get_host_stats
,
218 .issue_fc_host_lip
= fcoe_reset
,
220 .terminate_rport_io
= fc_rport_terminate_io
,
222 .bsg_request
= fc_lport_bsg_request
,
225 static struct scsi_host_template fcoe_shost_template
= {
226 .module
= THIS_MODULE
,
227 .name
= "FCoE Driver",
228 .proc_name
= FCOE_NAME
,
229 .queuecommand
= fc_queuecommand
,
230 .eh_abort_handler
= fc_eh_abort
,
231 .eh_device_reset_handler
= fc_eh_device_reset
,
232 .eh_host_reset_handler
= fc_eh_host_reset
,
233 .slave_alloc
= fc_slave_alloc
,
234 .change_queue_depth
= fc_change_queue_depth
,
235 .change_queue_type
= fc_change_queue_type
,
238 .can_queue
= FCOE_MAX_OUTSTANDING_COMMANDS
,
239 .use_clustering
= ENABLE_CLUSTERING
,
240 .sg_tablesize
= SG_ALL
,
241 .max_sectors
= 0xffff,
245 * fcoe_interface_setup() - Setup a FCoE interface
246 * @fcoe: The new FCoE interface
247 * @netdev: The net device that the fcoe interface is on
249 * Returns : 0 for success
250 * Locking: must be called with the RTNL mutex held
252 static int fcoe_interface_setup(struct fcoe_interface
*fcoe
,
253 struct net_device
*netdev
)
255 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
256 struct netdev_hw_addr
*ha
;
257 struct net_device
*real_dev
;
258 u8 flogi_maddr
[ETH_ALEN
];
259 const struct net_device_ops
*ops
;
261 fcoe
->netdev
= netdev
;
263 /* Let LLD initialize for FCoE */
264 ops
= netdev
->netdev_ops
;
265 if (ops
->ndo_fcoe_enable
) {
266 if (ops
->ndo_fcoe_enable(netdev
))
267 FCOE_NETDEV_DBG(netdev
, "Failed to enable FCoE"
268 " specific feature for LLD.\n");
271 /* Do not support for bonding device */
272 if (netdev
->priv_flags
& IFF_BONDING
&& netdev
->flags
& IFF_MASTER
) {
273 FCOE_NETDEV_DBG(netdev
, "Bonded interfaces not supported\n");
277 /* look for SAN MAC address, if multiple SAN MACs exist, only
278 * use the first one for SPMA */
279 real_dev
= (netdev
->priv_flags
& IFF_802_1Q_VLAN
) ?
280 vlan_dev_real_dev(netdev
) : netdev
;
282 for_each_dev_addr(real_dev
, ha
) {
283 if ((ha
->type
== NETDEV_HW_ADDR_T_SAN
) &&
284 (is_valid_ether_addr(ha
->addr
))) {
285 memcpy(fip
->ctl_src_addr
, ha
->addr
, ETH_ALEN
);
292 /* setup Source Mac Address */
294 memcpy(fip
->ctl_src_addr
, netdev
->dev_addr
, netdev
->addr_len
);
297 * Add FCoE MAC address as second unicast MAC address
298 * or enter promiscuous mode if not capable of listening
299 * for multiple unicast MACs.
301 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
302 dev_uc_add(netdev
, flogi_maddr
);
304 dev_uc_add(netdev
, fip
->ctl_src_addr
);
305 if (fip
->mode
== FIP_MODE_VN2VN
) {
306 dev_mc_add(netdev
, FIP_ALL_VN2VN_MACS
);
307 dev_mc_add(netdev
, FIP_ALL_P2P_MACS
);
309 dev_mc_add(netdev
, FIP_ALL_ENODE_MACS
);
312 * setup the receive function from ethernet driver
313 * on the ethertype for the given device
315 fcoe
->fcoe_packet_type
.func
= fcoe_rcv
;
316 fcoe
->fcoe_packet_type
.type
= __constant_htons(ETH_P_FCOE
);
317 fcoe
->fcoe_packet_type
.dev
= netdev
;
318 dev_add_pack(&fcoe
->fcoe_packet_type
);
320 fcoe
->fip_packet_type
.func
= fcoe_fip_recv
;
321 fcoe
->fip_packet_type
.type
= htons(ETH_P_FIP
);
322 fcoe
->fip_packet_type
.dev
= netdev
;
323 dev_add_pack(&fcoe
->fip_packet_type
);
329 * fcoe_interface_create() - Create a FCoE interface on a net device
330 * @netdev: The net device to create the FCoE interface on
331 * @fip_mode: The mode to use for FIP
333 * Returns: pointer to a struct fcoe_interface or NULL on error
335 static struct fcoe_interface
*fcoe_interface_create(struct net_device
*netdev
,
336 enum fip_state fip_mode
)
338 struct fcoe_interface
*fcoe
;
341 if (!try_module_get(THIS_MODULE
)) {
342 FCOE_NETDEV_DBG(netdev
,
343 "Could not get a reference to the module\n");
344 fcoe
= ERR_PTR(-EBUSY
);
348 fcoe
= kzalloc(sizeof(*fcoe
), GFP_KERNEL
);
350 FCOE_NETDEV_DBG(netdev
, "Could not allocate fcoe structure\n");
351 fcoe
= ERR_PTR(-ENOMEM
);
356 kref_init(&fcoe
->kref
);
361 fcoe_ctlr_init(&fcoe
->ctlr
, fip_mode
);
362 fcoe
->ctlr
.send
= fcoe_fip_send
;
363 fcoe
->ctlr
.update_mac
= fcoe_update_src_mac
;
364 fcoe
->ctlr
.get_src_addr
= fcoe_get_src_mac
;
366 err
= fcoe_interface_setup(fcoe
, netdev
);
368 fcoe_ctlr_destroy(&fcoe
->ctlr
);
378 module_put(THIS_MODULE
);
384 * fcoe_interface_release() - fcoe_port kref release function
385 * @kref: Embedded reference count in an fcoe_interface struct
387 static void fcoe_interface_release(struct kref
*kref
)
389 struct fcoe_interface
*fcoe
;
390 struct net_device
*netdev
;
392 fcoe
= container_of(kref
, struct fcoe_interface
, kref
);
393 netdev
= fcoe
->netdev
;
394 /* tear-down the FCoE controller */
395 fcoe_ctlr_destroy(&fcoe
->ctlr
);
398 module_put(THIS_MODULE
);
402 * fcoe_interface_get() - Get a reference to a FCoE interface
403 * @fcoe: The FCoE interface to be held
405 static inline void fcoe_interface_get(struct fcoe_interface
*fcoe
)
407 kref_get(&fcoe
->kref
);
411 * fcoe_interface_put() - Put a reference to a FCoE interface
412 * @fcoe: The FCoE interface to be released
414 static inline void fcoe_interface_put(struct fcoe_interface
*fcoe
)
416 kref_put(&fcoe
->kref
, fcoe_interface_release
);
420 * fcoe_interface_cleanup() - Clean up a FCoE interface
421 * @fcoe: The FCoE interface to be cleaned up
423 * Caller must be holding the RTNL mutex
425 void fcoe_interface_cleanup(struct fcoe_interface
*fcoe
)
427 struct net_device
*netdev
= fcoe
->netdev
;
428 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
429 u8 flogi_maddr
[ETH_ALEN
];
430 const struct net_device_ops
*ops
;
431 struct fcoe_port
*port
= lport_priv(fcoe
->ctlr
.lp
);
433 FCOE_NETDEV_DBG(netdev
, "Destroying interface\n");
435 /* Logout of the fabric */
436 fc_fabric_logoff(fcoe
->ctlr
.lp
);
438 /* Cleanup the fc_lport */
439 fc_lport_destroy(fcoe
->ctlr
.lp
);
441 /* Stop the transmit retry timer */
442 del_timer_sync(&port
->timer
);
444 /* Free existing transmit skbs */
445 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
448 * Don't listen for Ethernet packets anymore.
449 * synchronize_net() ensures that the packet handlers are not running
450 * on another CPU. dev_remove_pack() would do that, this calls the
451 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
453 __dev_remove_pack(&fcoe
->fcoe_packet_type
);
454 __dev_remove_pack(&fcoe
->fip_packet_type
);
457 /* Delete secondary MAC addresses */
458 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
459 dev_uc_del(netdev
, flogi_maddr
);
461 dev_uc_del(netdev
, fip
->ctl_src_addr
);
462 if (fip
->mode
== FIP_MODE_VN2VN
) {
463 dev_mc_del(netdev
, FIP_ALL_VN2VN_MACS
);
464 dev_mc_del(netdev
, FIP_ALL_P2P_MACS
);
466 dev_mc_del(netdev
, FIP_ALL_ENODE_MACS
);
468 if (!is_zero_ether_addr(port
->data_src_addr
))
469 dev_uc_del(netdev
, port
->data_src_addr
);
471 /* Tell the LLD we are done w/ FCoE */
472 ops
= netdev
->netdev_ops
;
473 if (ops
->ndo_fcoe_disable
) {
474 if (ops
->ndo_fcoe_disable(netdev
))
475 FCOE_NETDEV_DBG(netdev
, "Failed to disable FCoE"
476 " specific feature for LLD.\n");
478 fcoe_interface_put(fcoe
);
482 * fcoe_fip_recv() - Handler for received FIP frames
483 * @skb: The receive skb
484 * @netdev: The associated net device
485 * @ptype: The packet_type structure which was used to register this handler
486 * @orig_dev: The original net_device the the skb was received on.
487 * (in case dev is a bond)
489 * Returns: 0 for success
491 static int fcoe_fip_recv(struct sk_buff
*skb
, struct net_device
*netdev
,
492 struct packet_type
*ptype
,
493 struct net_device
*orig_dev
)
495 struct fcoe_interface
*fcoe
;
497 fcoe
= container_of(ptype
, struct fcoe_interface
, fip_packet_type
);
498 fcoe_ctlr_recv(&fcoe
->ctlr
, skb
);
503 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
504 * @fip: The FCoE controller
505 * @skb: The FIP packet to be sent
507 static void fcoe_fip_send(struct fcoe_ctlr
*fip
, struct sk_buff
*skb
)
509 skb
->dev
= fcoe_from_ctlr(fip
)->netdev
;
514 * fcoe_update_src_mac() - Update the Ethernet MAC filters
515 * @lport: The local port to update the source MAC on
516 * @addr: Unicast MAC address to add
518 * Remove any previously-set unicast MAC filter.
519 * Add secondary FCoE MAC address filter for our OUI.
521 static void fcoe_update_src_mac(struct fc_lport
*lport
, u8
*addr
)
523 struct fcoe_port
*port
= lport_priv(lport
);
524 struct fcoe_interface
*fcoe
= port
->priv
;
527 if (!is_zero_ether_addr(port
->data_src_addr
))
528 dev_uc_del(fcoe
->netdev
, port
->data_src_addr
);
529 if (!is_zero_ether_addr(addr
))
530 dev_uc_add(fcoe
->netdev
, addr
);
531 memcpy(port
->data_src_addr
, addr
, ETH_ALEN
);
536 * fcoe_get_src_mac() - return the Ethernet source address for an lport
537 * @lport: libfc lport
539 static u8
*fcoe_get_src_mac(struct fc_lport
*lport
)
541 struct fcoe_port
*port
= lport_priv(lport
);
543 return port
->data_src_addr
;
547 * fcoe_lport_config() - Set up a local port
548 * @lport: The local port to be setup
550 * Returns: 0 for success
552 static int fcoe_lport_config(struct fc_lport
*lport
)
556 lport
->max_retry_count
= 3;
557 lport
->max_rport_retry_count
= 3;
558 lport
->e_d_tov
= 2 * 1000; /* FC-FS default */
559 lport
->r_a_tov
= 2 * 2 * 1000;
560 lport
->service_params
= (FCP_SPPF_INIT_FCN
| FCP_SPPF_RD_XRDY_DIS
|
561 FCP_SPPF_RETRY
| FCP_SPPF_CONF_COMPL
);
562 lport
->does_npiv
= 1;
564 fc_lport_init_stats(lport
);
566 /* lport fc_lport related configuration */
567 fc_lport_config(lport
);
569 /* offload related configuration */
570 lport
->crc_offload
= 0;
571 lport
->seq_offload
= 0;
572 lport
->lro_enabled
= 0;
580 * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
581 * @netdev: the associated net device
582 * @wwn: the output WWN
583 * @type: the type of WWN (WWPN or WWNN)
585 * Returns: 0 for success
587 static int fcoe_get_wwn(struct net_device
*netdev
, u64
*wwn
, int type
)
589 const struct net_device_ops
*ops
= netdev
->netdev_ops
;
591 if (ops
->ndo_fcoe_get_wwn
)
592 return ops
->ndo_fcoe_get_wwn(netdev
, wwn
, type
);
597 * fcoe_netdev_features_change - Updates the lport's offload flags based
598 * on the LLD netdev's FCoE feature flags
600 static void fcoe_netdev_features_change(struct fc_lport
*lport
,
601 struct net_device
*netdev
)
603 mutex_lock(&lport
->lp_mutex
);
605 if (netdev
->features
& NETIF_F_SG
)
610 if (netdev
->features
& NETIF_F_FCOE_CRC
) {
611 lport
->crc_offload
= 1;
612 FCOE_NETDEV_DBG(netdev
, "Supports FCCRC offload\n");
614 lport
->crc_offload
= 0;
617 if (netdev
->features
& NETIF_F_FSO
) {
618 lport
->seq_offload
= 1;
619 lport
->lso_max
= netdev
->gso_max_size
;
620 FCOE_NETDEV_DBG(netdev
, "Supports LSO for max len 0x%x\n",
623 lport
->seq_offload
= 0;
627 if (netdev
->fcoe_ddp_xid
) {
628 lport
->lro_enabled
= 1;
629 lport
->lro_xid
= netdev
->fcoe_ddp_xid
;
630 FCOE_NETDEV_DBG(netdev
, "Supports LRO for max xid 0x%x\n",
633 lport
->lro_enabled
= 0;
637 mutex_unlock(&lport
->lp_mutex
);
641 * fcoe_netdev_config() - Set up net devive for SW FCoE
642 * @lport: The local port that is associated with the net device
643 * @netdev: The associated net device
645 * Must be called after fcoe_lport_config() as it will use local port mutex
647 * Returns: 0 for success
649 static int fcoe_netdev_config(struct fc_lport
*lport
, struct net_device
*netdev
)
653 struct fcoe_interface
*fcoe
;
654 struct fcoe_port
*port
;
656 /* Setup lport private data to point to fcoe softc */
657 port
= lport_priv(lport
);
661 * Determine max frame size based on underlying device and optional
662 * user-configured limit. If the MFS is too low, fcoe_link_ok()
663 * will return 0, so do this first.
666 if (netdev
->features
& NETIF_F_FCOE_MTU
) {
668 FCOE_NETDEV_DBG(netdev
, "Supports FCOE_MTU of %d bytes\n", mfs
);
670 mfs
-= (sizeof(struct fcoe_hdr
) + sizeof(struct fcoe_crc_eof
));
671 if (fc_set_mfs(lport
, mfs
))
674 /* offload features support */
675 fcoe_netdev_features_change(lport
, netdev
);
677 skb_queue_head_init(&port
->fcoe_pending_queue
);
678 port
->fcoe_pending_queue_active
= 0;
679 setup_timer(&port
->timer
, fcoe_queue_timer
, (unsigned long)lport
);
681 fcoe_link_speed_update(lport
);
684 if (fcoe_get_wwn(netdev
, &wwnn
, NETDEV_FCOE_WWNN
))
685 wwnn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
, 1, 0);
686 fc_set_wwnn(lport
, wwnn
);
687 if (fcoe_get_wwn(netdev
, &wwpn
, NETDEV_FCOE_WWPN
))
688 wwpn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
,
690 fc_set_wwpn(lport
, wwpn
);
697 * fcoe_shost_config() - Set up the SCSI host associated with a local port
698 * @lport: The local port
699 * @dev: The device associated with the SCSI host
701 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
703 * Returns: 0 for success
705 static int fcoe_shost_config(struct fc_lport
*lport
, struct device
*dev
)
709 /* lport scsi host config */
710 lport
->host
->max_lun
= FCOE_MAX_LUN
;
711 lport
->host
->max_id
= FCOE_MAX_FCP_TARGET
;
712 lport
->host
->max_channel
= 0;
713 lport
->host
->max_cmd_len
= FCOE_MAX_CMD_LEN
;
716 lport
->host
->transportt
= fcoe_vport_scsi_transport
;
718 lport
->host
->transportt
= fcoe_nport_scsi_transport
;
720 /* add the new host to the SCSI-ml */
721 rc
= scsi_add_host(lport
->host
, dev
);
723 FCOE_NETDEV_DBG(fcoe_netdev(lport
), "fcoe_shost_config: "
724 "error on scsi_add_host\n");
729 fc_host_max_npiv_vports(lport
->host
) = USHRT_MAX
;
731 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
732 "%s v%s over %s", FCOE_NAME
, FCOE_VERSION
,
733 fcoe_netdev(lport
)->name
);
739 * fcoe_oem_match() - The match routine for the offloaded exchange manager
742 * This routine will be associated with an exchange manager (EM). When
743 * the libfc exchange handling code is looking for an EM to use it will
744 * call this routine and pass it the frame that it wishes to send. This
745 * routine will return True if the associated EM is to be used and False
746 * if the echange code should continue looking for an EM.
748 * The offload EM that this routine is associated with will handle any
749 * packets that are for SCSI read requests.
751 * Returns: True for read types I/O, otherwise returns false.
753 bool fcoe_oem_match(struct fc_frame
*fp
)
755 return fc_fcp_is_read(fr_fsp(fp
)) &&
756 (fr_fsp(fp
)->data_len
> fcoe_ddp_min
);
760 * fcoe_em_config() - Allocate and configure an exchange manager
761 * @lport: The local port that the new EM will be associated with
763 * Returns: 0 on success
765 static inline int fcoe_em_config(struct fc_lport
*lport
)
767 struct fcoe_port
*port
= lport_priv(lport
);
768 struct fcoe_interface
*fcoe
= port
->priv
;
769 struct fcoe_interface
*oldfcoe
= NULL
;
770 struct net_device
*old_real_dev
, *cur_real_dev
;
771 u16 min_xid
= FCOE_MIN_XID
;
772 u16 max_xid
= FCOE_MAX_XID
;
775 * Check if need to allocate an em instance for
776 * offload exchange ids to be shared across all VN_PORTs/lport.
778 if (!lport
->lro_enabled
|| !lport
->lro_xid
||
779 (lport
->lro_xid
>= max_xid
)) {
785 * Reuse existing offload em instance in case
786 * it is already allocated on real eth device
788 if (fcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
789 cur_real_dev
= vlan_dev_real_dev(fcoe
->netdev
);
791 cur_real_dev
= fcoe
->netdev
;
793 list_for_each_entry(oldfcoe
, &fcoe_hostlist
, list
) {
794 if (oldfcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
795 old_real_dev
= vlan_dev_real_dev(oldfcoe
->netdev
);
797 old_real_dev
= oldfcoe
->netdev
;
799 if (cur_real_dev
== old_real_dev
) {
800 fcoe
->oem
= oldfcoe
->oem
;
806 if (!fc_exch_mgr_add(lport
, fcoe
->oem
, fcoe_oem_match
)) {
807 printk(KERN_ERR
"fcoe_em_config: failed to add "
808 "offload em:%p on interface:%s\n",
809 fcoe
->oem
, fcoe
->netdev
->name
);
813 fcoe
->oem
= fc_exch_mgr_alloc(lport
, FC_CLASS_3
,
814 FCOE_MIN_XID
, lport
->lro_xid
,
817 printk(KERN_ERR
"fcoe_em_config: failed to allocate "
818 "em for offload exches on interface:%s\n",
825 * Exclude offload EM xid range from next EM xid range.
827 min_xid
+= lport
->lro_xid
+ 1;
830 if (!fc_exch_mgr_alloc(lport
, FC_CLASS_3
, min_xid
, max_xid
, NULL
)) {
831 printk(KERN_ERR
"fcoe_em_config: failed to "
832 "allocate em on interface %s\n", fcoe
->netdev
->name
);
840 * fcoe_if_destroy() - Tear down a SW FCoE instance
841 * @lport: The local port to be destroyed
844 static void fcoe_if_destroy(struct fc_lport
*lport
)
846 /* Free queued packets for the per-CPU receive threads */
847 fcoe_percpu_clean(lport
);
849 /* Detach from the scsi-ml */
850 fc_remove_host(lport
->host
);
851 scsi_remove_host(lport
->host
);
853 /* Destroy lport scsi_priv */
854 fc_fcp_destroy(lport
);
856 /* There are no more rports or I/O, free the EM */
857 fc_exch_mgr_free(lport
);
859 /* Free memory used by statistical counters */
860 fc_lport_free_stats(lport
);
862 /* Release the Scsi_Host */
863 scsi_host_put(lport
->host
);
867 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
868 * @lport: The local port to setup DDP for
869 * @xid: The exchange ID for this DDP transfer
870 * @sgl: The scatterlist describing this transfer
871 * @sgc: The number of sg items
873 * Returns: 0 if the DDP context was not configured
875 static int fcoe_ddp_setup(struct fc_lport
*lport
, u16 xid
,
876 struct scatterlist
*sgl
, unsigned int sgc
)
878 struct net_device
*netdev
= fcoe_netdev(lport
);
880 if (netdev
->netdev_ops
->ndo_fcoe_ddp_setup
)
881 return netdev
->netdev_ops
->ndo_fcoe_ddp_setup(netdev
,
889 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
890 * @lport: The local port to complete DDP on
891 * @xid: The exchange ID for this DDP transfer
893 * Returns: the length of data that have been completed by DDP
895 static int fcoe_ddp_done(struct fc_lport
*lport
, u16 xid
)
897 struct net_device
*netdev
= fcoe_netdev(lport
);
899 if (netdev
->netdev_ops
->ndo_fcoe_ddp_done
)
900 return netdev
->netdev_ops
->ndo_fcoe_ddp_done(netdev
, xid
);
905 * fcoe_if_create() - Create a FCoE instance on an interface
906 * @fcoe: The FCoE interface to create a local port on
907 * @parent: The device pointer to be the parent in sysfs for the SCSI host
908 * @npiv: Indicates if the port is a vport or not
910 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
912 * Returns: The allocated fc_lport or an error pointer
914 static struct fc_lport
*fcoe_if_create(struct fcoe_interface
*fcoe
,
915 struct device
*parent
, int npiv
)
917 struct net_device
*netdev
= fcoe
->netdev
;
918 struct fc_lport
*lport
, *n_port
;
919 struct fcoe_port
*port
;
920 struct Scsi_Host
*shost
;
923 * parent is only a vport if npiv is 1,
924 * but we'll only use vport in that case so go ahead and set it
926 struct fc_vport
*vport
= dev_to_vport(parent
);
928 FCOE_NETDEV_DBG(netdev
, "Create Interface\n");
931 lport
= libfc_host_alloc(&fcoe_shost_template
, sizeof(*port
));
933 lport
= libfc_vport_create(vport
, sizeof(*port
));
936 FCOE_NETDEV_DBG(netdev
, "Could not allocate host structure\n");
940 port
= lport_priv(lport
);
943 port
->max_queue_depth
= FCOE_MAX_QUEUE_DEPTH
;
944 port
->min_queue_depth
= FCOE_MIN_QUEUE_DEPTH
;
945 INIT_WORK(&port
->destroy_work
, fcoe_destroy_work
);
947 /* configure a fc_lport including the exchange manager */
948 rc
= fcoe_lport_config(lport
);
950 FCOE_NETDEV_DBG(netdev
, "Could not configure lport for the "
956 FCOE_NETDEV_DBG(netdev
, "Setting vport names, "
957 "%16.16llx %16.16llx\n",
958 vport
->node_name
, vport
->port_name
);
959 fc_set_wwnn(lport
, vport
->node_name
);
960 fc_set_wwpn(lport
, vport
->port_name
);
963 /* configure lport network properties */
964 rc
= fcoe_netdev_config(lport
, netdev
);
966 FCOE_NETDEV_DBG(netdev
, "Could not configure netdev for the "
971 /* configure lport scsi host properties */
972 rc
= fcoe_shost_config(lport
, parent
);
974 FCOE_NETDEV_DBG(netdev
, "Could not configure shost for the "
979 /* Initialize the library */
980 rc
= fcoe_libfc_config(lport
, &fcoe
->ctlr
, &fcoe_libfc_fcn_templ
, 1);
982 FCOE_NETDEV_DBG(netdev
, "Could not configure libfc for the "
988 * fcoe_em_alloc() and fcoe_hostlist_add() both
989 * need to be atomic with respect to other changes to the
990 * hostlist since fcoe_em_alloc() looks for an existing EM
991 * instance on host list updated by fcoe_hostlist_add().
993 * This is currently handled through the fcoe_config_mutex
997 /* lport exch manager allocation */
998 rc
= fcoe_em_config(lport
);
1000 shost
= vport_to_shost(vport
);
1001 n_port
= shost_priv(shost
);
1002 rc
= fc_exch_mgr_list_clone(n_port
, lport
);
1006 FCOE_NETDEV_DBG(netdev
, "Could not configure the EM\n");
1007 goto out_lp_destroy
;
1010 fcoe_interface_get(fcoe
);
1014 fc_exch_mgr_free(lport
);
1016 scsi_host_put(lport
->host
);
1022 * fcoe_if_init() - Initialization routine for fcoe.ko
1024 * Attaches the SW FCoE transport to the FC transport
1026 * Returns: 0 on success
1028 static int __init
fcoe_if_init(void)
1030 /* attach to scsi transport */
1031 fcoe_nport_scsi_transport
=
1032 fc_attach_transport(&fcoe_nport_fc_functions
);
1033 fcoe_vport_scsi_transport
=
1034 fc_attach_transport(&fcoe_vport_fc_functions
);
1036 if (!fcoe_nport_scsi_transport
) {
1037 printk(KERN_ERR
"fcoe: Failed to attach to the FC transport\n");
1045 * fcoe_if_exit() - Tear down fcoe.ko
1047 * Detaches the SW FCoE transport from the FC transport
1049 * Returns: 0 on success
1051 int __exit
fcoe_if_exit(void)
1053 fc_release_transport(fcoe_nport_scsi_transport
);
1054 fc_release_transport(fcoe_vport_scsi_transport
);
1055 fcoe_nport_scsi_transport
= NULL
;
1056 fcoe_vport_scsi_transport
= NULL
;
1061 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1062 * @cpu: The CPU index of the CPU to create a receive thread for
1064 static void fcoe_percpu_thread_create(unsigned int cpu
)
1066 struct fcoe_percpu_s
*p
;
1067 struct task_struct
*thread
;
1069 p
= &per_cpu(fcoe_percpu
, cpu
);
1071 thread
= kthread_create(fcoe_percpu_receive_thread
,
1072 (void *)p
, "fcoethread/%d", cpu
);
1074 if (likely(!IS_ERR(thread
))) {
1075 kthread_bind(thread
, cpu
);
1076 wake_up_process(thread
);
1078 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1080 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1085 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1086 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1088 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1089 * current CPU's Rx thread. If the thread being destroyed is bound to
1090 * the CPU processing this context the skbs will be freed.
1092 static void fcoe_percpu_thread_destroy(unsigned int cpu
)
1094 struct fcoe_percpu_s
*p
;
1095 struct task_struct
*thread
;
1096 struct page
*crc_eof
;
1097 struct sk_buff
*skb
;
1099 struct fcoe_percpu_s
*p0
;
1100 unsigned targ_cpu
= get_cpu();
1101 #endif /* CONFIG_SMP */
1103 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu
);
1105 /* Prevent any new skbs from being queued for this CPU. */
1106 p
= &per_cpu(fcoe_percpu
, cpu
);
1107 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1110 crc_eof
= p
->crc_eof_page
;
1111 p
->crc_eof_page
= NULL
;
1112 p
->crc_eof_offset
= 0;
1113 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1117 * Don't bother moving the skb's if this context is running
1118 * on the same CPU that is having its thread destroyed. This
1119 * can easily happen when the module is removed.
1121 if (cpu
!= targ_cpu
) {
1122 p0
= &per_cpu(fcoe_percpu
, targ_cpu
);
1123 spin_lock_bh(&p0
->fcoe_rx_list
.lock
);
1125 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1128 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1129 __skb_queue_tail(&p0
->fcoe_rx_list
, skb
);
1130 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1133 * The targeted CPU is not initialized and cannot accept
1134 * new skbs. Unlock the targeted CPU and drop the skbs
1135 * on the CPU that is going offline.
1137 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1139 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1143 * This scenario occurs when the module is being removed
1144 * and all threads are being destroyed. skbs will continue
1145 * to be shifted from the CPU thread that is being removed
1146 * to the CPU thread associated with the CPU that is processing
1147 * the module removal. Once there is only one CPU Rx thread it
1148 * will reach this case and we will drop all skbs and later
1151 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1152 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1154 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1159 * This a non-SMP scenario where the singular Rx thread is
1160 * being removed. Free all skbs and stop the thread.
1162 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1163 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1165 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1169 kthread_stop(thread
);
1176 * fcoe_cpu_callback() - Handler for CPU hotplug events
1177 * @nfb: The callback data block
1178 * @action: The event triggering the callback
1179 * @hcpu: The index of the CPU that the event is for
1181 * This creates or destroys per-CPU data for fcoe
1183 * Returns NOTIFY_OK always.
1185 static int fcoe_cpu_callback(struct notifier_block
*nfb
,
1186 unsigned long action
, void *hcpu
)
1188 unsigned cpu
= (unsigned long)hcpu
;
1192 case CPU_ONLINE_FROZEN
:
1193 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu
);
1194 fcoe_percpu_thread_create(cpu
);
1197 case CPU_DEAD_FROZEN
:
1198 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu
);
1199 fcoe_percpu_thread_destroy(cpu
);
1208 * fcoe_rcv() - Receive packets from a net device
1209 * @skb: The received packet
1210 * @netdev: The net device that the packet was received on
1211 * @ptype: The packet type context
1212 * @olddev: The last device net device
1214 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1215 * FC frame and passes the frame to libfc.
1217 * Returns: 0 for success
1219 int fcoe_rcv(struct sk_buff
*skb
, struct net_device
*netdev
,
1220 struct packet_type
*ptype
, struct net_device
*olddev
)
1222 struct fc_lport
*lport
;
1223 struct fcoe_rcv_info
*fr
;
1224 struct fcoe_interface
*fcoe
;
1225 struct fc_frame_header
*fh
;
1226 struct fcoe_percpu_s
*fps
;
1230 fcoe
= container_of(ptype
, struct fcoe_interface
, fcoe_packet_type
);
1231 lport
= fcoe
->ctlr
.lp
;
1232 if (unlikely(!lport
)) {
1233 FCOE_NETDEV_DBG(netdev
, "Cannot find hba structure");
1236 if (!lport
->link_up
)
1239 FCOE_NETDEV_DBG(netdev
, "skb_info: len:%d data_len:%d head:%p "
1240 "data:%p tail:%p end:%p sum:%d dev:%s",
1241 skb
->len
, skb
->data_len
, skb
->head
, skb
->data
,
1242 skb_tail_pointer(skb
), skb_end_pointer(skb
),
1243 skb
->csum
, skb
->dev
? skb
->dev
->name
: "<NULL>");
1247 if (is_fip_mode(&fcoe
->ctlr
) &&
1248 compare_ether_addr(eh
->h_source
, fcoe
->ctlr
.dest_addr
)) {
1249 FCOE_NETDEV_DBG(netdev
, "wrong source mac address:%pM\n",
1255 * Check for minimum frame length, and make sure required FCoE
1256 * and FC headers are pulled into the linear data area.
1258 if (unlikely((skb
->len
< FCOE_MIN_FRAME
) ||
1259 !pskb_may_pull(skb
, FCOE_HEADER_LEN
)))
1262 skb_set_transport_header(skb
, sizeof(struct fcoe_hdr
));
1263 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1265 if (ntoh24(&eh
->h_dest
[3]) != ntoh24(fh
->fh_d_id
)) {
1266 FCOE_NETDEV_DBG(netdev
, "FC frame d_id mismatch with MAC:%pM\n",
1271 fr
= fcoe_dev_from_skb(skb
);
1276 * In case the incoming frame's exchange is originated from
1277 * the initiator, then received frame's exchange id is ANDed
1278 * with fc_cpu_mask bits to get the same cpu on which exchange
1279 * was originated, otherwise just use the current cpu.
1281 if (ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)
1282 cpu
= ntohs(fh
->fh_ox_id
) & fc_cpu_mask
;
1284 cpu
= smp_processor_id();
1286 fps
= &per_cpu(fcoe_percpu
, cpu
);
1287 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1288 if (unlikely(!fps
->thread
)) {
1290 * The targeted CPU is not ready, let's target
1291 * the first CPU now. For non-SMP systems this
1292 * will check the same CPU twice.
1294 FCOE_NETDEV_DBG(netdev
, "CPU is online, but no receive thread "
1295 "ready for incoming skb- using first online "
1298 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1299 cpu
= cpumask_first(cpu_online_mask
);
1300 fps
= &per_cpu(fcoe_percpu
, cpu
);
1301 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1303 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1309 * We now have a valid CPU that we're targeting for
1310 * this skb. We also have this receive thread locked,
1311 * so we're free to queue skbs into it's queue.
1314 /* If this is a SCSI-FCP frame, and this is already executing on the
1315 * correct CPU, and the queue for this CPU is empty, then go ahead
1316 * and process the frame directly in the softirq context.
1317 * This lets us process completions without context switching from the
1318 * NET_RX softirq, to our receive processing thread, and then back to
1319 * BLOCK softirq context.
1321 if (fh
->fh_type
== FC_TYPE_FCP
&&
1322 cpu
== smp_processor_id() &&
1323 skb_queue_empty(&fps
->fcoe_rx_list
)) {
1324 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1325 fcoe_recv_frame(skb
);
1327 __skb_queue_tail(&fps
->fcoe_rx_list
, skb
);
1328 if (fps
->fcoe_rx_list
.qlen
== 1)
1329 wake_up_process(fps
->thread
);
1330 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1335 per_cpu_ptr(lport
->dev_stats
, get_cpu())->ErrorFrames
++;
1343 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1344 * @skb: The packet to be transmitted
1345 * @tlen: The total length of the trailer
1347 * Returns: 0 for success
1349 static int fcoe_alloc_paged_crc_eof(struct sk_buff
*skb
, int tlen
)
1351 struct fcoe_percpu_s
*fps
;
1354 fps
= &get_cpu_var(fcoe_percpu
);
1355 rc
= fcoe_get_paged_crc_eof(skb
, tlen
, fps
);
1356 put_cpu_var(fcoe_percpu
);
1362 * fcoe_xmit() - Transmit a FCoE frame
1363 * @lport: The local port that the frame is to be transmitted for
1364 * @fp: The frame to be transmitted
1366 * Return: 0 for success
1368 int fcoe_xmit(struct fc_lport
*lport
, struct fc_frame
*fp
)
1373 struct fcoe_crc_eof
*cp
;
1374 struct sk_buff
*skb
;
1375 struct fcoe_dev_stats
*stats
;
1376 struct fc_frame_header
*fh
;
1377 unsigned int hlen
; /* header length implies the version */
1378 unsigned int tlen
; /* trailer length */
1379 unsigned int elen
; /* eth header, may include vlan */
1380 struct fcoe_port
*port
= lport_priv(lport
);
1381 struct fcoe_interface
*fcoe
= port
->priv
;
1383 struct fcoe_hdr
*hp
;
1385 WARN_ON((fr_len(fp
) % sizeof(u32
)) != 0);
1387 fh
= fc_frame_header_get(fp
);
1389 wlen
= skb
->len
/ FCOE_WORD_TO_BYTE
;
1391 if (!lport
->link_up
) {
1396 if (unlikely(fh
->fh_type
== FC_TYPE_ELS
) &&
1397 fcoe_ctlr_els_send(&fcoe
->ctlr
, lport
, skb
))
1403 elen
= sizeof(struct ethhdr
);
1404 hlen
= sizeof(struct fcoe_hdr
);
1405 tlen
= sizeof(struct fcoe_crc_eof
);
1406 wlen
= (skb
->len
- tlen
+ sizeof(crc
)) / FCOE_WORD_TO_BYTE
;
1409 if (likely(lport
->crc_offload
)) {
1410 skb
->ip_summed
= CHECKSUM_PARTIAL
;
1411 skb
->csum_start
= skb_headroom(skb
);
1412 skb
->csum_offset
= skb
->len
;
1415 skb
->ip_summed
= CHECKSUM_NONE
;
1416 crc
= fcoe_fc_crc(fp
);
1419 /* copy port crc and eof to the skb buff */
1420 if (skb_is_nonlinear(skb
)) {
1422 if (fcoe_alloc_paged_crc_eof(skb
, tlen
)) {
1426 frag
= &skb_shinfo(skb
)->frags
[skb_shinfo(skb
)->nr_frags
- 1];
1427 cp
= kmap_atomic(frag
->page
, KM_SKB_DATA_SOFTIRQ
)
1428 + frag
->page_offset
;
1430 cp
= (struct fcoe_crc_eof
*)skb_put(skb
, tlen
);
1433 memset(cp
, 0, sizeof(*cp
));
1435 cp
->fcoe_crc32
= cpu_to_le32(~crc
);
1437 if (skb_is_nonlinear(skb
)) {
1438 kunmap_atomic(cp
, KM_SKB_DATA_SOFTIRQ
);
1442 /* adjust skb network/transport offsets to match mac/fcoe/port */
1443 skb_push(skb
, elen
+ hlen
);
1444 skb_reset_mac_header(skb
);
1445 skb_reset_network_header(skb
);
1446 skb
->mac_len
= elen
;
1447 skb
->protocol
= htons(ETH_P_FCOE
);
1448 skb
->dev
= fcoe
->netdev
;
1450 /* fill up mac and fcoe headers */
1452 eh
->h_proto
= htons(ETH_P_FCOE
);
1453 memcpy(eh
->h_dest
, fcoe
->ctlr
.dest_addr
, ETH_ALEN
);
1454 if (fcoe
->ctlr
.map_dest
)
1455 memcpy(eh
->h_dest
+ 3, fh
->fh_d_id
, 3);
1457 if (unlikely(fcoe
->ctlr
.flogi_oxid
!= FC_XID_UNKNOWN
))
1458 memcpy(eh
->h_source
, fcoe
->ctlr
.ctl_src_addr
, ETH_ALEN
);
1460 memcpy(eh
->h_source
, port
->data_src_addr
, ETH_ALEN
);
1462 hp
= (struct fcoe_hdr
*)(eh
+ 1);
1463 memset(hp
, 0, sizeof(*hp
));
1465 FC_FCOE_ENCAPS_VER(hp
, FC_FCOE_VER
);
1468 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1469 if (lport
->seq_offload
&& fr_max_payload(fp
)) {
1470 skb_shinfo(skb
)->gso_type
= SKB_GSO_FCOE
;
1471 skb_shinfo(skb
)->gso_size
= fr_max_payload(fp
);
1473 skb_shinfo(skb
)->gso_type
= 0;
1474 skb_shinfo(skb
)->gso_size
= 0;
1476 /* update tx stats: regardless if LLD fails */
1477 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1479 stats
->TxWords
+= wlen
;
1482 /* send down to lld */
1484 if (port
->fcoe_pending_queue
.qlen
)
1485 fcoe_check_wait_queue(lport
, skb
);
1486 else if (fcoe_start_io(skb
))
1487 fcoe_check_wait_queue(lport
, skb
);
1493 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1494 * @skb: The completed skb (argument required by destructor)
1496 static void fcoe_percpu_flush_done(struct sk_buff
*skb
)
1498 complete(&fcoe_flush_completion
);
1502 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1503 * @lport: The local port the frame was received on
1504 * @fp: The received frame
1506 * Return: 0 on passing filtering checks
1508 static inline int fcoe_filter_frames(struct fc_lport
*lport
,
1509 struct fc_frame
*fp
)
1511 struct fcoe_interface
*fcoe
;
1512 struct fc_frame_header
*fh
;
1513 struct sk_buff
*skb
= (struct sk_buff
*)fp
;
1514 struct fcoe_dev_stats
*stats
;
1517 * We only check CRC if no offload is available and if it is
1518 * it's solicited data, in which case, the FCP layer would
1519 * check it during the copy.
1521 if (lport
->crc_offload
&& skb
->ip_summed
== CHECKSUM_UNNECESSARY
)
1522 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1524 fr_flags(fp
) |= FCPHF_CRC_UNCHECKED
;
1526 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1527 fh
= fc_frame_header_get(fp
);
1528 if (fh
->fh_r_ctl
== FC_RCTL_DD_SOL_DATA
&& fh
->fh_type
== FC_TYPE_FCP
)
1531 fcoe
= ((struct fcoe_port
*)lport_priv(lport
))->priv
;
1532 if (is_fip_mode(&fcoe
->ctlr
) && fc_frame_payload_op(fp
) == ELS_LOGO
&&
1533 ntoh24(fh
->fh_s_id
) == FC_FID_FLOGI
) {
1534 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1538 if (!(fr_flags(fp
) & FCPHF_CRC_UNCHECKED
) ||
1539 le32_to_cpu(fr_crc(fp
)) == ~crc32(~0, skb
->data
, skb
->len
)) {
1540 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1544 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1545 stats
->InvalidCRCCount
++;
1546 if (stats
->InvalidCRCCount
< 5)
1547 printk(KERN_WARNING
"fcoe: dropping frame with CRC error\n");
1552 * fcoe_recv_frame() - process a single received frame
1553 * @skb: frame to process
1555 static void fcoe_recv_frame(struct sk_buff
*skb
)
1558 struct fc_lport
*lport
;
1559 struct fcoe_rcv_info
*fr
;
1560 struct fcoe_dev_stats
*stats
;
1561 struct fcoe_crc_eof crc_eof
;
1562 struct fc_frame
*fp
;
1563 struct fcoe_port
*port
;
1564 struct fcoe_hdr
*hp
;
1566 fr
= fcoe_dev_from_skb(skb
);
1568 if (unlikely(!lport
)) {
1569 if (skb
->destructor
!= fcoe_percpu_flush_done
)
1570 FCOE_NETDEV_DBG(skb
->dev
, "NULL lport in skb");
1575 FCOE_NETDEV_DBG(skb
->dev
, "skb_info: len:%d data_len:%d "
1576 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1577 skb
->len
, skb
->data_len
,
1578 skb
->head
, skb
->data
, skb_tail_pointer(skb
),
1579 skb_end_pointer(skb
), skb
->csum
,
1580 skb
->dev
? skb
->dev
->name
: "<NULL>");
1582 port
= lport_priv(lport
);
1583 if (skb_is_nonlinear(skb
))
1584 skb_linearize(skb
); /* not ideal */
1587 * Frame length checks and setting up the header pointers
1588 * was done in fcoe_rcv already.
1590 hp
= (struct fcoe_hdr
*) skb_network_header(skb
);
1592 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1593 if (unlikely(FC_FCOE_DECAPS_VER(hp
) != FC_FCOE_VER
)) {
1594 if (stats
->ErrorFrames
< 5)
1595 printk(KERN_WARNING
"fcoe: FCoE version "
1596 "mismatch: The frame has "
1597 "version %x, but the "
1598 "initiator supports version "
1599 "%x\n", FC_FCOE_DECAPS_VER(hp
),
1604 skb_pull(skb
, sizeof(struct fcoe_hdr
));
1605 fr_len
= skb
->len
- sizeof(struct fcoe_crc_eof
);
1608 stats
->RxWords
+= fr_len
/ FCOE_WORD_TO_BYTE
;
1610 fp
= (struct fc_frame
*)skb
;
1613 fr_sof(fp
) = hp
->fcoe_sof
;
1615 /* Copy out the CRC and EOF trailer for access */
1616 if (skb_copy_bits(skb
, fr_len
, &crc_eof
, sizeof(crc_eof
)))
1618 fr_eof(fp
) = crc_eof
.fcoe_eof
;
1619 fr_crc(fp
) = crc_eof
.fcoe_crc32
;
1620 if (pskb_trim(skb
, fr_len
))
1623 if (!fcoe_filter_frames(lport
, fp
)) {
1625 fc_exch_recv(lport
, fp
);
1629 stats
->ErrorFrames
++;
1635 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1636 * @arg: The per-CPU context
1638 * Return: 0 for success
1640 int fcoe_percpu_receive_thread(void *arg
)
1642 struct fcoe_percpu_s
*p
= arg
;
1643 struct sk_buff
*skb
;
1645 set_user_nice(current
, -20);
1647 while (!kthread_should_stop()) {
1649 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1650 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) == NULL
) {
1651 set_current_state(TASK_INTERRUPTIBLE
);
1652 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1654 set_current_state(TASK_RUNNING
);
1655 if (kthread_should_stop())
1657 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1659 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1660 fcoe_recv_frame(skb
);
1666 * fcoe_dev_setup() - Setup the link change notification interface
1668 static void fcoe_dev_setup(void)
1670 register_netdevice_notifier(&fcoe_notifier
);
1674 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1676 static void fcoe_dev_cleanup(void)
1678 unregister_netdevice_notifier(&fcoe_notifier
);
1682 * fcoe_device_notification() - Handler for net device events
1683 * @notifier: The context of the notification
1684 * @event: The type of event
1685 * @ptr: The net device that the event was on
1687 * This function is called by the Ethernet driver in case of link change event.
1689 * Returns: 0 for success
1691 static int fcoe_device_notification(struct notifier_block
*notifier
,
1692 ulong event
, void *ptr
)
1694 struct fc_lport
*lport
= NULL
;
1695 struct net_device
*netdev
= ptr
;
1696 struct fcoe_interface
*fcoe
;
1697 struct fcoe_port
*port
;
1698 struct fcoe_dev_stats
*stats
;
1699 u32 link_possible
= 1;
1703 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
1704 if (fcoe
->netdev
== netdev
) {
1705 lport
= fcoe
->ctlr
.lp
;
1716 case NETDEV_GOING_DOWN
:
1722 case NETDEV_CHANGEMTU
:
1723 if (netdev
->features
& NETIF_F_FCOE_MTU
)
1725 mfs
= netdev
->mtu
- (sizeof(struct fcoe_hdr
) +
1726 sizeof(struct fcoe_crc_eof
));
1727 if (mfs
>= FC_MIN_MAX_FRAME
)
1728 fc_set_mfs(lport
, mfs
);
1730 case NETDEV_REGISTER
:
1732 case NETDEV_UNREGISTER
:
1733 list_del(&fcoe
->list
);
1734 port
= lport_priv(fcoe
->ctlr
.lp
);
1735 fcoe_interface_cleanup(fcoe
);
1736 queue_work(fcoe_wq
, &port
->destroy_work
);
1739 case NETDEV_FEAT_CHANGE
:
1740 fcoe_netdev_features_change(lport
, netdev
);
1743 FCOE_NETDEV_DBG(netdev
, "Unknown event %ld "
1744 "from netdev netlink\n", event
);
1747 fcoe_link_speed_update(lport
);
1749 if (link_possible
&& !fcoe_link_ok(lport
))
1750 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1751 else if (fcoe_ctlr_link_down(&fcoe
->ctlr
)) {
1752 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1753 stats
->LinkFailureCount
++;
1755 fcoe_clean_pending_queue(lport
);
1762 * fcoe_disable() - Disables a FCoE interface
1763 * @netdev : The net_device object the Ethernet interface to create on
1765 * Called from fcoe transport.
1767 * Returns: 0 for success
1769 static int fcoe_disable(struct net_device
*netdev
)
1771 struct fcoe_interface
*fcoe
;
1774 mutex_lock(&fcoe_config_mutex
);
1777 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1781 fcoe_ctlr_link_down(&fcoe
->ctlr
);
1782 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
1786 mutex_unlock(&fcoe_config_mutex
);
1791 * fcoe_enable() - Enables a FCoE interface
1792 * @netdev : The net_device object the Ethernet interface to create on
1794 * Called from fcoe transport.
1796 * Returns: 0 for success
1798 static int fcoe_enable(struct net_device
*netdev
)
1800 struct fcoe_interface
*fcoe
;
1803 mutex_lock(&fcoe_config_mutex
);
1805 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1810 else if (!fcoe_link_ok(fcoe
->ctlr
.lp
))
1811 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1813 mutex_unlock(&fcoe_config_mutex
);
1818 * fcoe_destroy() - Destroy a FCoE interface
1819 * @netdev : The net_device object the Ethernet interface to create on
1821 * Called from fcoe transport
1823 * Returns: 0 for success
1825 static int fcoe_destroy(struct net_device
*netdev
)
1827 struct fcoe_interface
*fcoe
;
1828 struct fc_lport
*lport
;
1831 mutex_lock(&fcoe_config_mutex
);
1833 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1839 lport
= fcoe
->ctlr
.lp
;
1840 list_del(&fcoe
->list
);
1841 fcoe_interface_cleanup(fcoe
);
1843 fcoe_if_destroy(lport
);
1845 mutex_unlock(&fcoe_config_mutex
);
1850 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1851 * @work: Handle to the FCoE port to be destroyed
1853 static void fcoe_destroy_work(struct work_struct
*work
)
1855 struct fcoe_port
*port
;
1857 port
= container_of(work
, struct fcoe_port
, destroy_work
);
1858 mutex_lock(&fcoe_config_mutex
);
1859 fcoe_if_destroy(port
->lport
);
1860 mutex_unlock(&fcoe_config_mutex
);
1864 * fcoe_match() - Check if the FCoE is supported on the given netdevice
1865 * @netdev : The net_device object the Ethernet interface to create on
1867 * Called from fcoe transport.
1869 * Returns: always returns true as this is the default FCoE transport,
1870 * i.e., support all netdevs.
1872 static bool fcoe_match(struct net_device
*netdev
)
1878 * fcoe_create() - Create a fcoe interface
1879 * @netdev : The net_device object the Ethernet interface to create on
1880 * @fip_mode: The FIP mode for this creation
1882 * Called from fcoe transport
1884 * Returns: 0 for success
1886 static int fcoe_create(struct net_device
*netdev
, enum fip_state fip_mode
)
1889 struct fcoe_interface
*fcoe
;
1890 struct fc_lport
*lport
;
1892 mutex_lock(&fcoe_config_mutex
);
1895 /* look for existing lport */
1896 if (fcoe_hostlist_lookup(netdev
)) {
1901 fcoe
= fcoe_interface_create(netdev
, fip_mode
);
1907 lport
= fcoe_if_create(fcoe
, &netdev
->dev
, 0);
1908 if (IS_ERR(lport
)) {
1909 printk(KERN_ERR
"fcoe: Failed to create interface (%s)\n",
1912 fcoe_interface_cleanup(fcoe
);
1916 /* Make this the "master" N_Port */
1917 fcoe
->ctlr
.lp
= lport
;
1919 /* add to lports list */
1920 fcoe_hostlist_add(lport
);
1922 /* start FIP Discovery and FLOGI */
1923 lport
->boot_time
= jiffies
;
1924 fc_fabric_login(lport
);
1925 if (!fcoe_link_ok(lport
))
1926 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1929 * Release from init in fcoe_interface_create(), on success lport
1930 * should be holding a reference taken in fcoe_if_create().
1932 fcoe_interface_put(fcoe
);
1934 mutex_unlock(&fcoe_config_mutex
);
1938 fcoe_interface_put(fcoe
);
1941 mutex_unlock(&fcoe_config_mutex
);
1946 * fcoe_link_speed_update() - Update the supported and actual link speeds
1947 * @lport: The local port to update speeds for
1949 * Returns: 0 if the ethtool query was successful
1950 * -1 if the ethtool query failed
1952 int fcoe_link_speed_update(struct fc_lport
*lport
)
1954 struct net_device
*netdev
= fcoe_netdev(lport
);
1955 struct ethtool_cmd ecmd
;
1957 if (!dev_ethtool_get_settings(netdev
, &ecmd
)) {
1958 lport
->link_supported_speeds
&=
1959 ~(FC_PORTSPEED_1GBIT
| FC_PORTSPEED_10GBIT
);
1960 if (ecmd
.supported
& (SUPPORTED_1000baseT_Half
|
1961 SUPPORTED_1000baseT_Full
))
1962 lport
->link_supported_speeds
|= FC_PORTSPEED_1GBIT
;
1963 if (ecmd
.supported
& SUPPORTED_10000baseT_Full
)
1964 lport
->link_supported_speeds
|=
1965 FC_PORTSPEED_10GBIT
;
1966 switch (ethtool_cmd_speed(&ecmd
)) {
1968 lport
->link_speed
= FC_PORTSPEED_1GBIT
;
1971 lport
->link_speed
= FC_PORTSPEED_10GBIT
;
1980 * fcoe_link_ok() - Check if the link is OK for a local port
1981 * @lport: The local port to check link on
1983 * Returns: 0 if link is UP and OK, -1 if not
1986 int fcoe_link_ok(struct fc_lport
*lport
)
1988 struct net_device
*netdev
= fcoe_netdev(lport
);
1990 if (netif_oper_up(netdev
))
1996 * fcoe_percpu_clean() - Clear all pending skbs for an local port
1997 * @lport: The local port whose skbs are to be cleared
1999 * Must be called with fcoe_create_mutex held to single-thread completion.
2001 * This flushes the pending skbs by adding a new skb to each queue and
2002 * waiting until they are all freed. This assures us that not only are
2003 * there no packets that will be handled by the lport, but also that any
2004 * threads already handling packet have returned.
2006 void fcoe_percpu_clean(struct fc_lport
*lport
)
2008 struct fcoe_percpu_s
*pp
;
2009 struct fcoe_rcv_info
*fr
;
2010 struct sk_buff_head
*list
;
2011 struct sk_buff
*skb
, *next
;
2012 struct sk_buff
*head
;
2015 for_each_possible_cpu(cpu
) {
2016 pp
= &per_cpu(fcoe_percpu
, cpu
);
2017 spin_lock_bh(&pp
->fcoe_rx_list
.lock
);
2018 list
= &pp
->fcoe_rx_list
;
2020 for (skb
= head
; skb
!= (struct sk_buff
*)list
;
2023 fr
= fcoe_dev_from_skb(skb
);
2024 if (fr
->fr_dev
== lport
) {
2025 __skb_unlink(skb
, list
);
2030 if (!pp
->thread
|| !cpu_online(cpu
)) {
2031 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2035 skb
= dev_alloc_skb(0);
2037 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2040 skb
->destructor
= fcoe_percpu_flush_done
;
2042 __skb_queue_tail(&pp
->fcoe_rx_list
, skb
);
2043 if (pp
->fcoe_rx_list
.qlen
== 1)
2044 wake_up_process(pp
->thread
);
2045 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2047 wait_for_completion(&fcoe_flush_completion
);
2052 * fcoe_reset() - Reset a local port
2053 * @shost: The SCSI host associated with the local port to be reset
2055 * Returns: Always 0 (return value required by FC transport template)
2057 int fcoe_reset(struct Scsi_Host
*shost
)
2059 struct fc_lport
*lport
= shost_priv(shost
);
2060 struct fcoe_port
*port
= lport_priv(lport
);
2061 struct fcoe_interface
*fcoe
= port
->priv
;
2063 fcoe_ctlr_link_down(&fcoe
->ctlr
);
2064 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
2065 if (!fcoe_link_ok(fcoe
->ctlr
.lp
))
2066 fcoe_ctlr_link_up(&fcoe
->ctlr
);
2071 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2072 * @netdev: The net device used as a key
2074 * Locking: Must be called with the RNL mutex held.
2076 * Returns: NULL or the FCoE interface
2078 static struct fcoe_interface
*
2079 fcoe_hostlist_lookup_port(const struct net_device
*netdev
)
2081 struct fcoe_interface
*fcoe
;
2083 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
2084 if (fcoe
->netdev
== netdev
)
2091 * fcoe_hostlist_lookup() - Find the local port associated with a
2093 * @netdev: The netdevice used as a key
2095 * Locking: Must be called with the RTNL mutex held
2097 * Returns: NULL or the local port
2099 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*netdev
)
2101 struct fcoe_interface
*fcoe
;
2103 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2104 return (fcoe
) ? fcoe
->ctlr
.lp
: NULL
;
2108 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2109 * port to the hostlist
2110 * @lport: The local port that identifies the FCoE interface to be added
2112 * Locking: must be called with the RTNL mutex held
2114 * Returns: 0 for success
2116 static int fcoe_hostlist_add(const struct fc_lport
*lport
)
2118 struct fcoe_interface
*fcoe
;
2119 struct fcoe_port
*port
;
2121 fcoe
= fcoe_hostlist_lookup_port(fcoe_netdev(lport
));
2123 port
= lport_priv(lport
);
2125 list_add_tail(&fcoe
->list
, &fcoe_hostlist
);
2131 static struct fcoe_transport fcoe_sw_transport
= {
2132 .name
= {FCOE_TRANSPORT_DEFAULT
},
2134 .list
= LIST_HEAD_INIT(fcoe_sw_transport
.list
),
2135 .match
= fcoe_match
,
2136 .create
= fcoe_create
,
2137 .destroy
= fcoe_destroy
,
2138 .enable
= fcoe_enable
,
2139 .disable
= fcoe_disable
,
2143 * fcoe_init() - Initialize fcoe.ko
2145 * Returns: 0 on success, or a negative value on failure
2147 static int __init
fcoe_init(void)
2149 struct fcoe_percpu_s
*p
;
2153 fcoe_wq
= alloc_workqueue("fcoe", 0, 0);
2157 /* register as a fcoe transport */
2158 rc
= fcoe_transport_attach(&fcoe_sw_transport
);
2160 printk(KERN_ERR
"failed to register an fcoe transport, check "
2161 "if libfcoe is loaded\n");
2165 mutex_lock(&fcoe_config_mutex
);
2167 for_each_possible_cpu(cpu
) {
2168 p
= &per_cpu(fcoe_percpu
, cpu
);
2169 skb_queue_head_init(&p
->fcoe_rx_list
);
2172 for_each_online_cpu(cpu
)
2173 fcoe_percpu_thread_create(cpu
);
2175 /* Initialize per CPU interrupt thread */
2176 rc
= register_hotcpu_notifier(&fcoe_cpu_notifier
);
2180 /* Setup link change notification */
2183 rc
= fcoe_if_init();
2187 mutex_unlock(&fcoe_config_mutex
);
2191 for_each_online_cpu(cpu
) {
2192 fcoe_percpu_thread_destroy(cpu
);
2194 mutex_unlock(&fcoe_config_mutex
);
2195 destroy_workqueue(fcoe_wq
);
2198 module_init(fcoe_init
);
2201 * fcoe_exit() - Clean up fcoe.ko
2203 * Returns: 0 on success or a negative value on failure
2205 static void __exit
fcoe_exit(void)
2207 struct fcoe_interface
*fcoe
, *tmp
;
2208 struct fcoe_port
*port
;
2211 mutex_lock(&fcoe_config_mutex
);
2215 /* releases the associated fcoe hosts */
2217 list_for_each_entry_safe(fcoe
, tmp
, &fcoe_hostlist
, list
) {
2218 list_del(&fcoe
->list
);
2219 port
= lport_priv(fcoe
->ctlr
.lp
);
2220 fcoe_interface_cleanup(fcoe
);
2221 queue_work(fcoe_wq
, &port
->destroy_work
);
2225 unregister_hotcpu_notifier(&fcoe_cpu_notifier
);
2227 for_each_online_cpu(cpu
)
2228 fcoe_percpu_thread_destroy(cpu
);
2230 mutex_unlock(&fcoe_config_mutex
);
2233 * destroy_work's may be chained but destroy_workqueue()
2234 * can take care of them. Just kill the fcoe_wq.
2236 destroy_workqueue(fcoe_wq
);
2239 * Detaching from the scsi transport must happen after all
2240 * destroys are done on the fcoe_wq. destroy_workqueue will
2241 * enusre the fcoe_wq is flushed.
2245 /* detach from fcoe transport */
2246 fcoe_transport_detach(&fcoe_sw_transport
);
2248 module_exit(fcoe_exit
);
2251 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2252 * @seq: active sequence in the FLOGI or FDISC exchange
2253 * @fp: response frame, or error encoded in a pointer (timeout)
2254 * @arg: pointer the the fcoe_ctlr structure
2256 * This handles MAC address management for FCoE, then passes control on to
2257 * the libfc FLOGI response handler.
2259 static void fcoe_flogi_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2261 struct fcoe_ctlr
*fip
= arg
;
2262 struct fc_exch
*exch
= fc_seq_exch(seq
);
2263 struct fc_lport
*lport
= exch
->lp
;
2269 mac
= fr_cb(fp
)->granted_mac
;
2270 if (is_zero_ether_addr(mac
)) {
2272 if (fcoe_ctlr_recv_flogi(fip
, lport
, fp
)) {
2277 fcoe_update_src_mac(lport
, mac
);
2279 fc_lport_flogi_resp(seq
, fp
, lport
);
2283 * fcoe_logo_resp() - FCoE specific LOGO response handler
2284 * @seq: active sequence in the LOGO exchange
2285 * @fp: response frame, or error encoded in a pointer (timeout)
2286 * @arg: pointer the the fcoe_ctlr structure
2288 * This handles MAC address management for FCoE, then passes control on to
2289 * the libfc LOGO response handler.
2291 static void fcoe_logo_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2293 struct fc_lport
*lport
= arg
;
2294 static u8 zero_mac
[ETH_ALEN
] = { 0 };
2297 fcoe_update_src_mac(lport
, zero_mac
);
2298 fc_lport_logo_resp(seq
, fp
, lport
);
2302 * fcoe_elsct_send - FCoE specific ELS handler
2304 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2305 * using FCoE specific response handlers and passing the FIP controller as
2306 * the argument (the lport is still available from the exchange).
2308 * Most of the work here is just handed off to the libfc routine.
2310 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*lport
, u32 did
,
2311 struct fc_frame
*fp
, unsigned int op
,
2312 void (*resp
)(struct fc_seq
*,
2315 void *arg
, u32 timeout
)
2317 struct fcoe_port
*port
= lport_priv(lport
);
2318 struct fcoe_interface
*fcoe
= port
->priv
;
2319 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
2320 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
2325 if (lport
->point_to_multipoint
)
2327 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_flogi_resp
,
2330 /* only hook onto fabric logouts, not port logouts */
2331 if (ntoh24(fh
->fh_d_id
) != FC_FID_FLOGI
)
2333 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_logo_resp
,
2336 return fc_elsct_send(lport
, did
, fp
, op
, resp
, arg
, timeout
);
2340 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2341 * @vport: fc_vport object to create a new fc_host for
2342 * @disabled: start the new fc_host in a disabled state by default?
2344 * Returns: 0 for success
2346 static int fcoe_vport_create(struct fc_vport
*vport
, bool disabled
)
2348 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2349 struct fc_lport
*n_port
= shost_priv(shost
);
2350 struct fcoe_port
*port
= lport_priv(n_port
);
2351 struct fcoe_interface
*fcoe
= port
->priv
;
2352 struct net_device
*netdev
= fcoe
->netdev
;
2353 struct fc_lport
*vn_port
;
2355 mutex_lock(&fcoe_config_mutex
);
2356 vn_port
= fcoe_if_create(fcoe
, &vport
->dev
, 1);
2357 mutex_unlock(&fcoe_config_mutex
);
2359 if (IS_ERR(vn_port
)) {
2360 printk(KERN_ERR
"fcoe: fcoe_vport_create(%s) failed\n",
2366 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2368 vn_port
->boot_time
= jiffies
;
2369 fc_fabric_login(vn_port
);
2370 fc_vport_setlink(vn_port
);
2376 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2377 * @vport: fc_vport object that is being destroyed
2379 * Returns: 0 for success
2381 static int fcoe_vport_destroy(struct fc_vport
*vport
)
2383 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2384 struct fc_lport
*n_port
= shost_priv(shost
);
2385 struct fc_lport
*vn_port
= vport
->dd_data
;
2386 struct fcoe_port
*port
= lport_priv(vn_port
);
2388 mutex_lock(&n_port
->lp_mutex
);
2389 list_del(&vn_port
->list
);
2390 mutex_unlock(&n_port
->lp_mutex
);
2391 queue_work(fcoe_wq
, &port
->destroy_work
);
2396 * fcoe_vport_disable() - change vport state
2397 * @vport: vport to bring online/offline
2398 * @disable: should the vport be disabled?
2400 static int fcoe_vport_disable(struct fc_vport
*vport
, bool disable
)
2402 struct fc_lport
*lport
= vport
->dd_data
;
2405 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2406 fc_fabric_logoff(lport
);
2408 lport
->boot_time
= jiffies
;
2409 fc_fabric_login(lport
);
2410 fc_vport_setlink(lport
);
2417 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2418 * @vport: fc_vport with a new symbolic name string
2420 * After generating a new symbolic name string, a new RSPN_ID request is
2421 * sent to the name server. There is no response handler, so if it fails
2422 * for some reason it will not be retried.
2424 static void fcoe_set_vport_symbolic_name(struct fc_vport
*vport
)
2426 struct fc_lport
*lport
= vport
->dd_data
;
2427 struct fc_frame
*fp
;
2430 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
2431 "%s v%s over %s : %s", FCOE_NAME
, FCOE_VERSION
,
2432 fcoe_netdev(lport
)->name
, vport
->symbolic_name
);
2434 if (lport
->state
!= LPORT_ST_READY
)
2437 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
2438 fp
= fc_frame_alloc(lport
,
2439 sizeof(struct fc_ct_hdr
) +
2440 sizeof(struct fc_ns_rspn
) + len
);
2443 lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, FC_NS_RSPN_ID
,
2444 NULL
, NULL
, 3 * lport
->r_a_tov
);
2448 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2449 * @lport: the local port
2450 * @fc_lesb: the link error status block
2452 static void fcoe_get_lesb(struct fc_lport
*lport
,
2453 struct fc_els_lesb
*fc_lesb
)
2456 u32 lfc
, vlfc
, mdac
;
2457 struct fcoe_dev_stats
*devst
;
2458 struct fcoe_fc_els_lesb
*lesb
;
2459 struct rtnl_link_stats64 temp
;
2460 struct net_device
*netdev
= fcoe_netdev(lport
);
2465 lesb
= (struct fcoe_fc_els_lesb
*)fc_lesb
;
2466 memset(lesb
, 0, sizeof(*lesb
));
2467 for_each_possible_cpu(cpu
) {
2468 devst
= per_cpu_ptr(lport
->dev_stats
, cpu
);
2469 lfc
+= devst
->LinkFailureCount
;
2470 vlfc
+= devst
->VLinkFailureCount
;
2471 mdac
+= devst
->MissDiscAdvCount
;
2473 lesb
->lesb_link_fail
= htonl(lfc
);
2474 lesb
->lesb_vlink_fail
= htonl(vlfc
);
2475 lesb
->lesb_miss_fka
= htonl(mdac
);
2476 lesb
->lesb_fcs_error
= htonl(dev_get_stats(netdev
, &temp
)->rx_crc_errors
);
2480 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2481 * @lport: the local port
2482 * @port_id: the port ID
2483 * @fp: the received frame, if any, that caused the port_id to be set.
2485 * This routine handles the case where we received a FLOGI and are
2486 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2487 * so it can set the non-mapped mode and gateway address.
2489 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2491 static void fcoe_set_port_id(struct fc_lport
*lport
,
2492 u32 port_id
, struct fc_frame
*fp
)
2494 struct fcoe_port
*port
= lport_priv(lport
);
2495 struct fcoe_interface
*fcoe
= port
->priv
;
2497 if (fp
&& fc_frame_payload_op(fp
) == ELS_FLOGI
)
2498 fcoe_ctlr_recv_flogi(&fcoe
->ctlr
, lport
, fp
);