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
*);
141 static int fcoe_validate_vport_create(struct fc_vport
*);
143 static struct libfc_function_template fcoe_libfc_fcn_templ
= {
144 .frame_send
= fcoe_xmit
,
145 .ddp_setup
= fcoe_ddp_setup
,
146 .ddp_done
= fcoe_ddp_done
,
147 .ddp_target
= fcoe_ddp_target
,
148 .elsct_send
= fcoe_elsct_send
,
149 .get_lesb
= fcoe_get_lesb
,
150 .lport_set_port_id
= fcoe_set_port_id
,
153 struct fc_function_template fcoe_nport_fc_functions
= {
154 .show_host_node_name
= 1,
155 .show_host_port_name
= 1,
156 .show_host_supported_classes
= 1,
157 .show_host_supported_fc4s
= 1,
158 .show_host_active_fc4s
= 1,
159 .show_host_maxframe_size
= 1,
161 .show_host_port_id
= 1,
162 .show_host_supported_speeds
= 1,
163 .get_host_speed
= fc_get_host_speed
,
164 .show_host_speed
= 1,
165 .show_host_port_type
= 1,
166 .get_host_port_state
= fc_get_host_port_state
,
167 .show_host_port_state
= 1,
168 .show_host_symbolic_name
= 1,
170 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
171 .show_rport_maxframe_size
= 1,
172 .show_rport_supported_classes
= 1,
174 .show_host_fabric_name
= 1,
175 .show_starget_node_name
= 1,
176 .show_starget_port_name
= 1,
177 .show_starget_port_id
= 1,
178 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
179 .show_rport_dev_loss_tmo
= 1,
180 .get_fc_host_stats
= fc_get_host_stats
,
181 .issue_fc_host_lip
= fcoe_reset
,
183 .terminate_rport_io
= fc_rport_terminate_io
,
185 .vport_create
= fcoe_vport_create
,
186 .vport_delete
= fcoe_vport_destroy
,
187 .vport_disable
= fcoe_vport_disable
,
188 .set_vport_symbolic_name
= fcoe_set_vport_symbolic_name
,
190 .bsg_request
= fc_lport_bsg_request
,
193 struct fc_function_template fcoe_vport_fc_functions
= {
194 .show_host_node_name
= 1,
195 .show_host_port_name
= 1,
196 .show_host_supported_classes
= 1,
197 .show_host_supported_fc4s
= 1,
198 .show_host_active_fc4s
= 1,
199 .show_host_maxframe_size
= 1,
201 .show_host_port_id
= 1,
202 .show_host_supported_speeds
= 1,
203 .get_host_speed
= fc_get_host_speed
,
204 .show_host_speed
= 1,
205 .show_host_port_type
= 1,
206 .get_host_port_state
= fc_get_host_port_state
,
207 .show_host_port_state
= 1,
208 .show_host_symbolic_name
= 1,
210 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
211 .show_rport_maxframe_size
= 1,
212 .show_rport_supported_classes
= 1,
214 .show_host_fabric_name
= 1,
215 .show_starget_node_name
= 1,
216 .show_starget_port_name
= 1,
217 .show_starget_port_id
= 1,
218 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
219 .show_rport_dev_loss_tmo
= 1,
220 .get_fc_host_stats
= fc_get_host_stats
,
221 .issue_fc_host_lip
= fcoe_reset
,
223 .terminate_rport_io
= fc_rport_terminate_io
,
225 .bsg_request
= fc_lport_bsg_request
,
228 static struct scsi_host_template fcoe_shost_template
= {
229 .module
= THIS_MODULE
,
230 .name
= "FCoE Driver",
231 .proc_name
= FCOE_NAME
,
232 .queuecommand
= fc_queuecommand
,
233 .eh_abort_handler
= fc_eh_abort
,
234 .eh_device_reset_handler
= fc_eh_device_reset
,
235 .eh_host_reset_handler
= fc_eh_host_reset
,
236 .slave_alloc
= fc_slave_alloc
,
237 .change_queue_depth
= fc_change_queue_depth
,
238 .change_queue_type
= fc_change_queue_type
,
241 .can_queue
= FCOE_MAX_OUTSTANDING_COMMANDS
,
242 .use_clustering
= ENABLE_CLUSTERING
,
243 .sg_tablesize
= SG_ALL
,
244 .max_sectors
= 0xffff,
248 * fcoe_interface_setup() - Setup a FCoE interface
249 * @fcoe: The new FCoE interface
250 * @netdev: The net device that the fcoe interface is on
252 * Returns : 0 for success
253 * Locking: must be called with the RTNL mutex held
255 static int fcoe_interface_setup(struct fcoe_interface
*fcoe
,
256 struct net_device
*netdev
)
258 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
259 struct netdev_hw_addr
*ha
;
260 struct net_device
*real_dev
;
261 u8 flogi_maddr
[ETH_ALEN
];
262 const struct net_device_ops
*ops
;
264 fcoe
->netdev
= netdev
;
266 /* Let LLD initialize for FCoE */
267 ops
= netdev
->netdev_ops
;
268 if (ops
->ndo_fcoe_enable
) {
269 if (ops
->ndo_fcoe_enable(netdev
))
270 FCOE_NETDEV_DBG(netdev
, "Failed to enable FCoE"
271 " specific feature for LLD.\n");
274 /* Do not support for bonding device */
275 if (netdev
->priv_flags
& IFF_BONDING
&& netdev
->flags
& IFF_MASTER
) {
276 FCOE_NETDEV_DBG(netdev
, "Bonded interfaces not supported\n");
280 /* look for SAN MAC address, if multiple SAN MACs exist, only
281 * use the first one for SPMA */
282 real_dev
= (netdev
->priv_flags
& IFF_802_1Q_VLAN
) ?
283 vlan_dev_real_dev(netdev
) : netdev
;
285 for_each_dev_addr(real_dev
, ha
) {
286 if ((ha
->type
== NETDEV_HW_ADDR_T_SAN
) &&
287 (is_valid_ether_addr(ha
->addr
))) {
288 memcpy(fip
->ctl_src_addr
, ha
->addr
, ETH_ALEN
);
295 /* setup Source Mac Address */
297 memcpy(fip
->ctl_src_addr
, netdev
->dev_addr
, netdev
->addr_len
);
300 * Add FCoE MAC address as second unicast MAC address
301 * or enter promiscuous mode if not capable of listening
302 * for multiple unicast MACs.
304 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
305 dev_uc_add(netdev
, flogi_maddr
);
307 dev_uc_add(netdev
, fip
->ctl_src_addr
);
308 if (fip
->mode
== FIP_MODE_VN2VN
) {
309 dev_mc_add(netdev
, FIP_ALL_VN2VN_MACS
);
310 dev_mc_add(netdev
, FIP_ALL_P2P_MACS
);
312 dev_mc_add(netdev
, FIP_ALL_ENODE_MACS
);
315 * setup the receive function from ethernet driver
316 * on the ethertype for the given device
318 fcoe
->fcoe_packet_type
.func
= fcoe_rcv
;
319 fcoe
->fcoe_packet_type
.type
= __constant_htons(ETH_P_FCOE
);
320 fcoe
->fcoe_packet_type
.dev
= netdev
;
321 dev_add_pack(&fcoe
->fcoe_packet_type
);
323 fcoe
->fip_packet_type
.func
= fcoe_fip_recv
;
324 fcoe
->fip_packet_type
.type
= htons(ETH_P_FIP
);
325 fcoe
->fip_packet_type
.dev
= netdev
;
326 dev_add_pack(&fcoe
->fip_packet_type
);
332 * fcoe_interface_create() - Create a FCoE interface on a net device
333 * @netdev: The net device to create the FCoE interface on
334 * @fip_mode: The mode to use for FIP
336 * Returns: pointer to a struct fcoe_interface or NULL on error
338 static struct fcoe_interface
*fcoe_interface_create(struct net_device
*netdev
,
339 enum fip_state fip_mode
)
341 struct fcoe_interface
*fcoe
;
344 if (!try_module_get(THIS_MODULE
)) {
345 FCOE_NETDEV_DBG(netdev
,
346 "Could not get a reference to the module\n");
347 fcoe
= ERR_PTR(-EBUSY
);
351 fcoe
= kzalloc(sizeof(*fcoe
), GFP_KERNEL
);
353 FCOE_NETDEV_DBG(netdev
, "Could not allocate fcoe structure\n");
354 fcoe
= ERR_PTR(-ENOMEM
);
359 kref_init(&fcoe
->kref
);
364 fcoe_ctlr_init(&fcoe
->ctlr
, fip_mode
);
365 fcoe
->ctlr
.send
= fcoe_fip_send
;
366 fcoe
->ctlr
.update_mac
= fcoe_update_src_mac
;
367 fcoe
->ctlr
.get_src_addr
= fcoe_get_src_mac
;
369 err
= fcoe_interface_setup(fcoe
, netdev
);
371 fcoe_ctlr_destroy(&fcoe
->ctlr
);
381 module_put(THIS_MODULE
);
387 * fcoe_interface_release() - fcoe_port kref release function
388 * @kref: Embedded reference count in an fcoe_interface struct
390 static void fcoe_interface_release(struct kref
*kref
)
392 struct fcoe_interface
*fcoe
;
393 struct net_device
*netdev
;
395 fcoe
= container_of(kref
, struct fcoe_interface
, kref
);
396 netdev
= fcoe
->netdev
;
397 /* tear-down the FCoE controller */
398 fcoe_ctlr_destroy(&fcoe
->ctlr
);
401 module_put(THIS_MODULE
);
405 * fcoe_interface_get() - Get a reference to a FCoE interface
406 * @fcoe: The FCoE interface to be held
408 static inline void fcoe_interface_get(struct fcoe_interface
*fcoe
)
410 kref_get(&fcoe
->kref
);
414 * fcoe_interface_put() - Put a reference to a FCoE interface
415 * @fcoe: The FCoE interface to be released
417 static inline void fcoe_interface_put(struct fcoe_interface
*fcoe
)
419 kref_put(&fcoe
->kref
, fcoe_interface_release
);
423 * fcoe_interface_cleanup() - Clean up a FCoE interface
424 * @fcoe: The FCoE interface to be cleaned up
426 * Caller must be holding the RTNL mutex
428 void fcoe_interface_cleanup(struct fcoe_interface
*fcoe
)
430 struct net_device
*netdev
= fcoe
->netdev
;
431 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
432 u8 flogi_maddr
[ETH_ALEN
];
433 const struct net_device_ops
*ops
;
438 * Don't listen for Ethernet packets anymore.
439 * synchronize_net() ensures that the packet handlers are not running
440 * on another CPU. dev_remove_pack() would do that, this calls the
441 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
443 __dev_remove_pack(&fcoe
->fcoe_packet_type
);
444 __dev_remove_pack(&fcoe
->fip_packet_type
);
447 /* Delete secondary MAC addresses */
448 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
449 dev_uc_del(netdev
, flogi_maddr
);
451 dev_uc_del(netdev
, fip
->ctl_src_addr
);
452 if (fip
->mode
== FIP_MODE_VN2VN
) {
453 dev_mc_del(netdev
, FIP_ALL_VN2VN_MACS
);
454 dev_mc_del(netdev
, FIP_ALL_P2P_MACS
);
456 dev_mc_del(netdev
, FIP_ALL_ENODE_MACS
);
458 /* Tell the LLD we are done w/ FCoE */
459 ops
= netdev
->netdev_ops
;
460 if (ops
->ndo_fcoe_disable
) {
461 if (ops
->ndo_fcoe_disable(netdev
))
462 FCOE_NETDEV_DBG(netdev
, "Failed to disable FCoE"
463 " specific feature for LLD.\n");
468 /* Release the self-reference taken during fcoe_interface_create() */
469 fcoe_interface_put(fcoe
);
473 * fcoe_fip_recv() - Handler for received FIP frames
474 * @skb: The receive skb
475 * @netdev: The associated net device
476 * @ptype: The packet_type structure which was used to register this handler
477 * @orig_dev: The original net_device the the skb was received on.
478 * (in case dev is a bond)
480 * Returns: 0 for success
482 static int fcoe_fip_recv(struct sk_buff
*skb
, struct net_device
*netdev
,
483 struct packet_type
*ptype
,
484 struct net_device
*orig_dev
)
486 struct fcoe_interface
*fcoe
;
488 fcoe
= container_of(ptype
, struct fcoe_interface
, fip_packet_type
);
489 fcoe_ctlr_recv(&fcoe
->ctlr
, skb
);
494 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
495 * @port: The FCoE port
496 * @skb: The FIP/FCoE packet to be sent
498 static void fcoe_port_send(struct fcoe_port
*port
, struct sk_buff
*skb
)
500 if (port
->fcoe_pending_queue
.qlen
)
501 fcoe_check_wait_queue(port
->lport
, skb
);
502 else if (fcoe_start_io(skb
))
503 fcoe_check_wait_queue(port
->lport
, skb
);
507 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
508 * @fip: The FCoE controller
509 * @skb: The FIP packet to be sent
511 static void fcoe_fip_send(struct fcoe_ctlr
*fip
, struct sk_buff
*skb
)
513 skb
->dev
= fcoe_from_ctlr(fip
)->netdev
;
514 fcoe_port_send(lport_priv(fip
->lp
), skb
);
518 * fcoe_update_src_mac() - Update the Ethernet MAC filters
519 * @lport: The local port to update the source MAC on
520 * @addr: Unicast MAC address to add
522 * Remove any previously-set unicast MAC filter.
523 * Add secondary FCoE MAC address filter for our OUI.
525 static void fcoe_update_src_mac(struct fc_lport
*lport
, u8
*addr
)
527 struct fcoe_port
*port
= lport_priv(lport
);
528 struct fcoe_interface
*fcoe
= port
->priv
;
531 if (!is_zero_ether_addr(port
->data_src_addr
))
532 dev_uc_del(fcoe
->netdev
, port
->data_src_addr
);
533 if (!is_zero_ether_addr(addr
))
534 dev_uc_add(fcoe
->netdev
, addr
);
535 memcpy(port
->data_src_addr
, addr
, ETH_ALEN
);
540 * fcoe_get_src_mac() - return the Ethernet source address for an lport
541 * @lport: libfc lport
543 static u8
*fcoe_get_src_mac(struct fc_lport
*lport
)
545 struct fcoe_port
*port
= lport_priv(lport
);
547 return port
->data_src_addr
;
551 * fcoe_lport_config() - Set up a local port
552 * @lport: The local port to be setup
554 * Returns: 0 for success
556 static int fcoe_lport_config(struct fc_lport
*lport
)
560 lport
->max_retry_count
= 3;
561 lport
->max_rport_retry_count
= 3;
562 lport
->e_d_tov
= 2 * 1000; /* FC-FS default */
563 lport
->r_a_tov
= 2 * 2 * 1000;
564 lport
->service_params
= (FCP_SPPF_INIT_FCN
| FCP_SPPF_RD_XRDY_DIS
|
565 FCP_SPPF_RETRY
| FCP_SPPF_CONF_COMPL
);
566 lport
->does_npiv
= 1;
568 fc_lport_init_stats(lport
);
570 /* lport fc_lport related configuration */
571 fc_lport_config(lport
);
573 /* offload related configuration */
574 lport
->crc_offload
= 0;
575 lport
->seq_offload
= 0;
576 lport
->lro_enabled
= 0;
584 * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
585 * @netdev: the associated net device
586 * @wwn: the output WWN
587 * @type: the type of WWN (WWPN or WWNN)
589 * Returns: 0 for success
591 static int fcoe_get_wwn(struct net_device
*netdev
, u64
*wwn
, int type
)
593 const struct net_device_ops
*ops
= netdev
->netdev_ops
;
595 if (ops
->ndo_fcoe_get_wwn
)
596 return ops
->ndo_fcoe_get_wwn(netdev
, wwn
, type
);
601 * fcoe_netdev_features_change - Updates the lport's offload flags based
602 * on the LLD netdev's FCoE feature flags
604 static void fcoe_netdev_features_change(struct fc_lport
*lport
,
605 struct net_device
*netdev
)
607 mutex_lock(&lport
->lp_mutex
);
609 if (netdev
->features
& NETIF_F_SG
)
614 if (netdev
->features
& NETIF_F_FCOE_CRC
) {
615 lport
->crc_offload
= 1;
616 FCOE_NETDEV_DBG(netdev
, "Supports FCCRC offload\n");
618 lport
->crc_offload
= 0;
621 if (netdev
->features
& NETIF_F_FSO
) {
622 lport
->seq_offload
= 1;
623 lport
->lso_max
= netdev
->gso_max_size
;
624 FCOE_NETDEV_DBG(netdev
, "Supports LSO for max len 0x%x\n",
627 lport
->seq_offload
= 0;
631 if (netdev
->fcoe_ddp_xid
) {
632 lport
->lro_enabled
= 1;
633 lport
->lro_xid
= netdev
->fcoe_ddp_xid
;
634 FCOE_NETDEV_DBG(netdev
, "Supports LRO for max xid 0x%x\n",
637 lport
->lro_enabled
= 0;
641 mutex_unlock(&lport
->lp_mutex
);
645 * fcoe_netdev_config() - Set up net devive for SW FCoE
646 * @lport: The local port that is associated with the net device
647 * @netdev: The associated net device
649 * Must be called after fcoe_lport_config() as it will use local port mutex
651 * Returns: 0 for success
653 static int fcoe_netdev_config(struct fc_lport
*lport
, struct net_device
*netdev
)
657 struct fcoe_interface
*fcoe
;
658 struct fcoe_port
*port
;
660 /* Setup lport private data to point to fcoe softc */
661 port
= lport_priv(lport
);
665 * Determine max frame size based on underlying device and optional
666 * user-configured limit. If the MFS is too low, fcoe_link_ok()
667 * will return 0, so do this first.
670 if (netdev
->features
& NETIF_F_FCOE_MTU
) {
672 FCOE_NETDEV_DBG(netdev
, "Supports FCOE_MTU of %d bytes\n", mfs
);
674 mfs
-= (sizeof(struct fcoe_hdr
) + sizeof(struct fcoe_crc_eof
));
675 if (fc_set_mfs(lport
, mfs
))
678 /* offload features support */
679 fcoe_netdev_features_change(lport
, netdev
);
681 skb_queue_head_init(&port
->fcoe_pending_queue
);
682 port
->fcoe_pending_queue_active
= 0;
683 setup_timer(&port
->timer
, fcoe_queue_timer
, (unsigned long)lport
);
685 fcoe_link_speed_update(lport
);
688 if (fcoe_get_wwn(netdev
, &wwnn
, NETDEV_FCOE_WWNN
))
689 wwnn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
, 1, 0);
690 fc_set_wwnn(lport
, wwnn
);
691 if (fcoe_get_wwn(netdev
, &wwpn
, NETDEV_FCOE_WWPN
))
692 wwpn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
,
694 fc_set_wwpn(lport
, wwpn
);
701 * fcoe_shost_config() - Set up the SCSI host associated with a local port
702 * @lport: The local port
703 * @dev: The device associated with the SCSI host
705 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
707 * Returns: 0 for success
709 static int fcoe_shost_config(struct fc_lport
*lport
, struct device
*dev
)
713 /* lport scsi host config */
714 lport
->host
->max_lun
= FCOE_MAX_LUN
;
715 lport
->host
->max_id
= FCOE_MAX_FCP_TARGET
;
716 lport
->host
->max_channel
= 0;
717 lport
->host
->max_cmd_len
= FCOE_MAX_CMD_LEN
;
720 lport
->host
->transportt
= fcoe_vport_scsi_transport
;
722 lport
->host
->transportt
= fcoe_nport_scsi_transport
;
724 /* add the new host to the SCSI-ml */
725 rc
= scsi_add_host(lport
->host
, dev
);
727 FCOE_NETDEV_DBG(fcoe_netdev(lport
), "fcoe_shost_config: "
728 "error on scsi_add_host\n");
733 fc_host_max_npiv_vports(lport
->host
) = USHRT_MAX
;
735 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
736 "%s v%s over %s", FCOE_NAME
, FCOE_VERSION
,
737 fcoe_netdev(lport
)->name
);
743 * fcoe_oem_match() - The match routine for the offloaded exchange manager
746 * This routine will be associated with an exchange manager (EM). When
747 * the libfc exchange handling code is looking for an EM to use it will
748 * call this routine and pass it the frame that it wishes to send. This
749 * routine will return True if the associated EM is to be used and False
750 * if the echange code should continue looking for an EM.
752 * The offload EM that this routine is associated with will handle any
753 * packets that are for SCSI read requests.
755 * This has been enhanced to work when FCoE stack is operating in target
758 * Returns: True for read types I/O, otherwise returns false.
760 bool fcoe_oem_match(struct fc_frame
*fp
)
762 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
763 struct fcp_cmnd
*fcp
;
765 if (fc_fcp_is_read(fr_fsp(fp
)) &&
766 (fr_fsp(fp
)->data_len
> fcoe_ddp_min
))
768 else if (!(ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)) {
769 fcp
= fc_frame_payload_get(fp
, sizeof(*fcp
));
770 if (ntohs(fh
->fh_rx_id
) == FC_XID_UNKNOWN
&&
771 fcp
&& (ntohl(fcp
->fc_dl
) > fcoe_ddp_min
) &&
772 (fcp
->fc_flags
& FCP_CFL_WRDATA
))
779 * fcoe_em_config() - Allocate and configure an exchange manager
780 * @lport: The local port that the new EM will be associated with
782 * Returns: 0 on success
784 static inline int fcoe_em_config(struct fc_lport
*lport
)
786 struct fcoe_port
*port
= lport_priv(lport
);
787 struct fcoe_interface
*fcoe
= port
->priv
;
788 struct fcoe_interface
*oldfcoe
= NULL
;
789 struct net_device
*old_real_dev
, *cur_real_dev
;
790 u16 min_xid
= FCOE_MIN_XID
;
791 u16 max_xid
= FCOE_MAX_XID
;
794 * Check if need to allocate an em instance for
795 * offload exchange ids to be shared across all VN_PORTs/lport.
797 if (!lport
->lro_enabled
|| !lport
->lro_xid
||
798 (lport
->lro_xid
>= max_xid
)) {
804 * Reuse existing offload em instance in case
805 * it is already allocated on real eth device
807 if (fcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
808 cur_real_dev
= vlan_dev_real_dev(fcoe
->netdev
);
810 cur_real_dev
= fcoe
->netdev
;
812 list_for_each_entry(oldfcoe
, &fcoe_hostlist
, list
) {
813 if (oldfcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
814 old_real_dev
= vlan_dev_real_dev(oldfcoe
->netdev
);
816 old_real_dev
= oldfcoe
->netdev
;
818 if (cur_real_dev
== old_real_dev
) {
819 fcoe
->oem
= oldfcoe
->oem
;
825 if (!fc_exch_mgr_add(lport
, fcoe
->oem
, fcoe_oem_match
)) {
826 printk(KERN_ERR
"fcoe_em_config: failed to add "
827 "offload em:%p on interface:%s\n",
828 fcoe
->oem
, fcoe
->netdev
->name
);
832 fcoe
->oem
= fc_exch_mgr_alloc(lport
, FC_CLASS_3
,
833 FCOE_MIN_XID
, lport
->lro_xid
,
836 printk(KERN_ERR
"fcoe_em_config: failed to allocate "
837 "em for offload exches on interface:%s\n",
844 * Exclude offload EM xid range from next EM xid range.
846 min_xid
+= lport
->lro_xid
+ 1;
849 if (!fc_exch_mgr_alloc(lport
, FC_CLASS_3
, min_xid
, max_xid
, NULL
)) {
850 printk(KERN_ERR
"fcoe_em_config: failed to "
851 "allocate em on interface %s\n", fcoe
->netdev
->name
);
859 * fcoe_if_destroy() - Tear down a SW FCoE instance
860 * @lport: The local port to be destroyed
863 static void fcoe_if_destroy(struct fc_lport
*lport
)
865 struct fcoe_port
*port
= lport_priv(lport
);
866 struct fcoe_interface
*fcoe
= port
->priv
;
867 struct net_device
*netdev
= fcoe
->netdev
;
869 FCOE_NETDEV_DBG(netdev
, "Destroying interface\n");
871 /* Logout of the fabric */
872 fc_fabric_logoff(lport
);
874 /* Cleanup the fc_lport */
875 fc_lport_destroy(lport
);
877 /* Stop the transmit retry timer */
878 del_timer_sync(&port
->timer
);
880 /* Free existing transmit skbs */
881 fcoe_clean_pending_queue(lport
);
884 if (!is_zero_ether_addr(port
->data_src_addr
))
885 dev_uc_del(netdev
, port
->data_src_addr
);
888 /* Release reference held in fcoe_if_create() */
889 fcoe_interface_put(fcoe
);
891 /* Free queued packets for the per-CPU receive threads */
892 fcoe_percpu_clean(lport
);
894 /* Detach from the scsi-ml */
895 fc_remove_host(lport
->host
);
896 scsi_remove_host(lport
->host
);
898 /* Destroy lport scsi_priv */
899 fc_fcp_destroy(lport
);
901 /* There are no more rports or I/O, free the EM */
902 fc_exch_mgr_free(lport
);
904 /* Free memory used by statistical counters */
905 fc_lport_free_stats(lport
);
907 /* Release the Scsi_Host */
908 scsi_host_put(lport
->host
);
912 * fcoe_ddp_setup() - Call a LLD's ddp_setup 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_setup(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_setup
)
926 return netdev
->netdev_ops
->ndo_fcoe_ddp_setup(netdev
,
934 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
935 * @lport: The local port to setup DDP for
936 * @xid: The exchange ID for this DDP transfer
937 * @sgl: The scatterlist describing this transfer
938 * @sgc: The number of sg items
940 * Returns: 0 if the DDP context was not configured
942 static int fcoe_ddp_target(struct fc_lport
*lport
, u16 xid
,
943 struct scatterlist
*sgl
, unsigned int sgc
)
945 struct net_device
*netdev
= fcoe_netdev(lport
);
947 if (netdev
->netdev_ops
->ndo_fcoe_ddp_target
)
948 return netdev
->netdev_ops
->ndo_fcoe_ddp_target(netdev
, xid
,
956 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
957 * @lport: The local port to complete DDP on
958 * @xid: The exchange ID for this DDP transfer
960 * Returns: the length of data that have been completed by DDP
962 static int fcoe_ddp_done(struct fc_lport
*lport
, u16 xid
)
964 struct net_device
*netdev
= fcoe_netdev(lport
);
966 if (netdev
->netdev_ops
->ndo_fcoe_ddp_done
)
967 return netdev
->netdev_ops
->ndo_fcoe_ddp_done(netdev
, xid
);
972 * fcoe_if_create() - Create a FCoE instance on an interface
973 * @fcoe: The FCoE interface to create a local port on
974 * @parent: The device pointer to be the parent in sysfs for the SCSI host
975 * @npiv: Indicates if the port is a vport or not
977 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
979 * Returns: The allocated fc_lport or an error pointer
981 static struct fc_lport
*fcoe_if_create(struct fcoe_interface
*fcoe
,
982 struct device
*parent
, int npiv
)
984 struct net_device
*netdev
= fcoe
->netdev
;
985 struct fc_lport
*lport
, *n_port
;
986 struct fcoe_port
*port
;
987 struct Scsi_Host
*shost
;
990 * parent is only a vport if npiv is 1,
991 * but we'll only use vport in that case so go ahead and set it
993 struct fc_vport
*vport
= dev_to_vport(parent
);
995 FCOE_NETDEV_DBG(netdev
, "Create Interface\n");
998 lport
= libfc_host_alloc(&fcoe_shost_template
, sizeof(*port
));
1000 lport
= libfc_vport_create(vport
, sizeof(*port
));
1003 FCOE_NETDEV_DBG(netdev
, "Could not allocate host structure\n");
1007 port
= lport_priv(lport
);
1008 port
->lport
= lport
;
1010 port
->max_queue_depth
= FCOE_MAX_QUEUE_DEPTH
;
1011 port
->min_queue_depth
= FCOE_MIN_QUEUE_DEPTH
;
1012 INIT_WORK(&port
->destroy_work
, fcoe_destroy_work
);
1014 /* configure a fc_lport including the exchange manager */
1015 rc
= fcoe_lport_config(lport
);
1017 FCOE_NETDEV_DBG(netdev
, "Could not configure lport for the "
1023 FCOE_NETDEV_DBG(netdev
, "Setting vport names, "
1024 "%16.16llx %16.16llx\n",
1025 vport
->node_name
, vport
->port_name
);
1026 fc_set_wwnn(lport
, vport
->node_name
);
1027 fc_set_wwpn(lport
, vport
->port_name
);
1030 /* configure lport network properties */
1031 rc
= fcoe_netdev_config(lport
, netdev
);
1033 FCOE_NETDEV_DBG(netdev
, "Could not configure netdev for the "
1035 goto out_lp_destroy
;
1038 /* configure lport scsi host properties */
1039 rc
= fcoe_shost_config(lport
, parent
);
1041 FCOE_NETDEV_DBG(netdev
, "Could not configure shost for the "
1043 goto out_lp_destroy
;
1046 /* Initialize the library */
1047 rc
= fcoe_libfc_config(lport
, &fcoe
->ctlr
, &fcoe_libfc_fcn_templ
, 1);
1049 FCOE_NETDEV_DBG(netdev
, "Could not configure libfc for the "
1051 goto out_lp_destroy
;
1055 * fcoe_em_alloc() and fcoe_hostlist_add() both
1056 * need to be atomic with respect to other changes to the
1057 * hostlist since fcoe_em_alloc() looks for an existing EM
1058 * instance on host list updated by fcoe_hostlist_add().
1060 * This is currently handled through the fcoe_config_mutex
1064 /* lport exch manager allocation */
1065 rc
= fcoe_em_config(lport
);
1067 shost
= vport_to_shost(vport
);
1068 n_port
= shost_priv(shost
);
1069 rc
= fc_exch_mgr_list_clone(n_port
, lport
);
1073 FCOE_NETDEV_DBG(netdev
, "Could not configure the EM\n");
1074 goto out_lp_destroy
;
1077 fcoe_interface_get(fcoe
);
1081 fc_exch_mgr_free(lport
);
1083 scsi_host_put(lport
->host
);
1089 * fcoe_if_init() - Initialization routine for fcoe.ko
1091 * Attaches the SW FCoE transport to the FC transport
1093 * Returns: 0 on success
1095 static int __init
fcoe_if_init(void)
1097 /* attach to scsi transport */
1098 fcoe_nport_scsi_transport
=
1099 fc_attach_transport(&fcoe_nport_fc_functions
);
1100 fcoe_vport_scsi_transport
=
1101 fc_attach_transport(&fcoe_vport_fc_functions
);
1103 if (!fcoe_nport_scsi_transport
) {
1104 printk(KERN_ERR
"fcoe: Failed to attach to the FC transport\n");
1112 * fcoe_if_exit() - Tear down fcoe.ko
1114 * Detaches the SW FCoE transport from the FC transport
1116 * Returns: 0 on success
1118 int __exit
fcoe_if_exit(void)
1120 fc_release_transport(fcoe_nport_scsi_transport
);
1121 fc_release_transport(fcoe_vport_scsi_transport
);
1122 fcoe_nport_scsi_transport
= NULL
;
1123 fcoe_vport_scsi_transport
= NULL
;
1128 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1129 * @cpu: The CPU index of the CPU to create a receive thread for
1131 static void fcoe_percpu_thread_create(unsigned int cpu
)
1133 struct fcoe_percpu_s
*p
;
1134 struct task_struct
*thread
;
1136 p
= &per_cpu(fcoe_percpu
, cpu
);
1138 thread
= kthread_create(fcoe_percpu_receive_thread
,
1139 (void *)p
, "fcoethread/%d", cpu
);
1141 if (likely(!IS_ERR(thread
))) {
1142 kthread_bind(thread
, cpu
);
1143 wake_up_process(thread
);
1145 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1147 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1152 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1153 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1155 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1156 * current CPU's Rx thread. If the thread being destroyed is bound to
1157 * the CPU processing this context the skbs will be freed.
1159 static void fcoe_percpu_thread_destroy(unsigned int cpu
)
1161 struct fcoe_percpu_s
*p
;
1162 struct task_struct
*thread
;
1163 struct page
*crc_eof
;
1164 struct sk_buff
*skb
;
1166 struct fcoe_percpu_s
*p0
;
1167 unsigned targ_cpu
= get_cpu();
1168 #endif /* CONFIG_SMP */
1170 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu
);
1172 /* Prevent any new skbs from being queued for this CPU. */
1173 p
= &per_cpu(fcoe_percpu
, cpu
);
1174 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1177 crc_eof
= p
->crc_eof_page
;
1178 p
->crc_eof_page
= NULL
;
1179 p
->crc_eof_offset
= 0;
1180 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1184 * Don't bother moving the skb's if this context is running
1185 * on the same CPU that is having its thread destroyed. This
1186 * can easily happen when the module is removed.
1188 if (cpu
!= targ_cpu
) {
1189 p0
= &per_cpu(fcoe_percpu
, targ_cpu
);
1190 spin_lock_bh(&p0
->fcoe_rx_list
.lock
);
1192 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1195 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1196 __skb_queue_tail(&p0
->fcoe_rx_list
, skb
);
1197 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1200 * The targeted CPU is not initialized and cannot accept
1201 * new skbs. Unlock the targeted CPU and drop the skbs
1202 * on the CPU that is going offline.
1204 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1206 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1210 * This scenario occurs when the module is being removed
1211 * and all threads are being destroyed. skbs will continue
1212 * to be shifted from the CPU thread that is being removed
1213 * to the CPU thread associated with the CPU that is processing
1214 * the module removal. Once there is only one CPU Rx thread it
1215 * will reach this case and we will drop all skbs and later
1218 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1219 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1221 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1226 * This a non-SMP scenario where the singular Rx thread is
1227 * being removed. Free all skbs and stop the thread.
1229 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1230 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1232 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1236 kthread_stop(thread
);
1243 * fcoe_cpu_callback() - Handler for CPU hotplug events
1244 * @nfb: The callback data block
1245 * @action: The event triggering the callback
1246 * @hcpu: The index of the CPU that the event is for
1248 * This creates or destroys per-CPU data for fcoe
1250 * Returns NOTIFY_OK always.
1252 static int fcoe_cpu_callback(struct notifier_block
*nfb
,
1253 unsigned long action
, void *hcpu
)
1255 unsigned cpu
= (unsigned long)hcpu
;
1259 case CPU_ONLINE_FROZEN
:
1260 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu
);
1261 fcoe_percpu_thread_create(cpu
);
1264 case CPU_DEAD_FROZEN
:
1265 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu
);
1266 fcoe_percpu_thread_destroy(cpu
);
1275 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1278 * This routine selects next CPU based on cpumask to distribute
1279 * incoming requests in round robin.
1281 * Returns: int CPU number
1283 static inline unsigned int fcoe_select_cpu(void)
1285 static unsigned int selected_cpu
;
1287 selected_cpu
= cpumask_next(selected_cpu
, cpu_online_mask
);
1288 if (selected_cpu
>= nr_cpu_ids
)
1289 selected_cpu
= cpumask_first(cpu_online_mask
);
1291 return selected_cpu
;
1295 * fcoe_rcv() - Receive packets from a net device
1296 * @skb: The received packet
1297 * @netdev: The net device that the packet was received on
1298 * @ptype: The packet type context
1299 * @olddev: The last device net device
1301 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1302 * FC frame and passes the frame to libfc.
1304 * Returns: 0 for success
1306 int fcoe_rcv(struct sk_buff
*skb
, struct net_device
*netdev
,
1307 struct packet_type
*ptype
, struct net_device
*olddev
)
1309 struct fc_lport
*lport
;
1310 struct fcoe_rcv_info
*fr
;
1311 struct fcoe_interface
*fcoe
;
1312 struct fc_frame_header
*fh
;
1313 struct fcoe_percpu_s
*fps
;
1317 fcoe
= container_of(ptype
, struct fcoe_interface
, fcoe_packet_type
);
1318 lport
= fcoe
->ctlr
.lp
;
1319 if (unlikely(!lport
)) {
1320 FCOE_NETDEV_DBG(netdev
, "Cannot find hba structure");
1323 if (!lport
->link_up
)
1326 FCOE_NETDEV_DBG(netdev
, "skb_info: len:%d data_len:%d head:%p "
1327 "data:%p tail:%p end:%p sum:%d dev:%s",
1328 skb
->len
, skb
->data_len
, skb
->head
, skb
->data
,
1329 skb_tail_pointer(skb
), skb_end_pointer(skb
),
1330 skb
->csum
, skb
->dev
? skb
->dev
->name
: "<NULL>");
1334 if (is_fip_mode(&fcoe
->ctlr
) &&
1335 compare_ether_addr(eh
->h_source
, fcoe
->ctlr
.dest_addr
)) {
1336 FCOE_NETDEV_DBG(netdev
, "wrong source mac address:%pM\n",
1342 * Check for minimum frame length, and make sure required FCoE
1343 * and FC headers are pulled into the linear data area.
1345 if (unlikely((skb
->len
< FCOE_MIN_FRAME
) ||
1346 !pskb_may_pull(skb
, FCOE_HEADER_LEN
)))
1349 skb_set_transport_header(skb
, sizeof(struct fcoe_hdr
));
1350 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1352 if (ntoh24(&eh
->h_dest
[3]) != ntoh24(fh
->fh_d_id
)) {
1353 FCOE_NETDEV_DBG(netdev
, "FC frame d_id mismatch with MAC:%pM\n",
1358 fr
= fcoe_dev_from_skb(skb
);
1362 * In case the incoming frame's exchange is originated from
1363 * the initiator, then received frame's exchange id is ANDed
1364 * with fc_cpu_mask bits to get the same cpu on which exchange
1365 * was originated, otherwise select cpu using rx exchange id
1366 * or fcoe_select_cpu().
1368 if (ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)
1369 cpu
= ntohs(fh
->fh_ox_id
) & fc_cpu_mask
;
1371 if (ntohs(fh
->fh_rx_id
) == FC_XID_UNKNOWN
)
1372 cpu
= fcoe_select_cpu();
1374 cpu
= ntohs(fh
->fh_rx_id
) & fc_cpu_mask
;
1377 if (cpu
>= nr_cpu_ids
)
1380 fps
= &per_cpu(fcoe_percpu
, cpu
);
1381 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1382 if (unlikely(!fps
->thread
)) {
1384 * The targeted CPU is not ready, let's target
1385 * the first CPU now. For non-SMP systems this
1386 * will check the same CPU twice.
1388 FCOE_NETDEV_DBG(netdev
, "CPU is online, but no receive thread "
1389 "ready for incoming skb- using first online "
1392 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1393 cpu
= cpumask_first(cpu_online_mask
);
1394 fps
= &per_cpu(fcoe_percpu
, cpu
);
1395 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1397 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1403 * We now have a valid CPU that we're targeting for
1404 * this skb. We also have this receive thread locked,
1405 * so we're free to queue skbs into it's queue.
1408 /* If this is a SCSI-FCP frame, and this is already executing on the
1409 * correct CPU, and the queue for this CPU is empty, then go ahead
1410 * and process the frame directly in the softirq context.
1411 * This lets us process completions without context switching from the
1412 * NET_RX softirq, to our receive processing thread, and then back to
1413 * BLOCK softirq context.
1415 if (fh
->fh_type
== FC_TYPE_FCP
&&
1416 cpu
== smp_processor_id() &&
1417 skb_queue_empty(&fps
->fcoe_rx_list
)) {
1418 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1419 fcoe_recv_frame(skb
);
1421 __skb_queue_tail(&fps
->fcoe_rx_list
, skb
);
1422 if (fps
->fcoe_rx_list
.qlen
== 1)
1423 wake_up_process(fps
->thread
);
1424 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1429 per_cpu_ptr(lport
->dev_stats
, get_cpu())->ErrorFrames
++;
1437 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1438 * @skb: The packet to be transmitted
1439 * @tlen: The total length of the trailer
1441 * Returns: 0 for success
1443 static int fcoe_alloc_paged_crc_eof(struct sk_buff
*skb
, int tlen
)
1445 struct fcoe_percpu_s
*fps
;
1448 fps
= &get_cpu_var(fcoe_percpu
);
1449 rc
= fcoe_get_paged_crc_eof(skb
, tlen
, fps
);
1450 put_cpu_var(fcoe_percpu
);
1456 * fcoe_xmit() - Transmit a FCoE frame
1457 * @lport: The local port that the frame is to be transmitted for
1458 * @fp: The frame to be transmitted
1460 * Return: 0 for success
1462 int fcoe_xmit(struct fc_lport
*lport
, struct fc_frame
*fp
)
1467 struct fcoe_crc_eof
*cp
;
1468 struct sk_buff
*skb
;
1469 struct fcoe_dev_stats
*stats
;
1470 struct fc_frame_header
*fh
;
1471 unsigned int hlen
; /* header length implies the version */
1472 unsigned int tlen
; /* trailer length */
1473 unsigned int elen
; /* eth header, may include vlan */
1474 struct fcoe_port
*port
= lport_priv(lport
);
1475 struct fcoe_interface
*fcoe
= port
->priv
;
1477 struct fcoe_hdr
*hp
;
1479 WARN_ON((fr_len(fp
) % sizeof(u32
)) != 0);
1481 fh
= fc_frame_header_get(fp
);
1483 wlen
= skb
->len
/ FCOE_WORD_TO_BYTE
;
1485 if (!lport
->link_up
) {
1490 if (unlikely(fh
->fh_type
== FC_TYPE_ELS
) &&
1491 fcoe_ctlr_els_send(&fcoe
->ctlr
, lport
, skb
))
1497 elen
= sizeof(struct ethhdr
);
1498 hlen
= sizeof(struct fcoe_hdr
);
1499 tlen
= sizeof(struct fcoe_crc_eof
);
1500 wlen
= (skb
->len
- tlen
+ sizeof(crc
)) / FCOE_WORD_TO_BYTE
;
1503 if (likely(lport
->crc_offload
)) {
1504 skb
->ip_summed
= CHECKSUM_PARTIAL
;
1505 skb
->csum_start
= skb_headroom(skb
);
1506 skb
->csum_offset
= skb
->len
;
1509 skb
->ip_summed
= CHECKSUM_NONE
;
1510 crc
= fcoe_fc_crc(fp
);
1513 /* copy port crc and eof to the skb buff */
1514 if (skb_is_nonlinear(skb
)) {
1516 if (fcoe_alloc_paged_crc_eof(skb
, tlen
)) {
1520 frag
= &skb_shinfo(skb
)->frags
[skb_shinfo(skb
)->nr_frags
- 1];
1521 cp
= kmap_atomic(frag
->page
, KM_SKB_DATA_SOFTIRQ
)
1522 + frag
->page_offset
;
1524 cp
= (struct fcoe_crc_eof
*)skb_put(skb
, tlen
);
1527 memset(cp
, 0, sizeof(*cp
));
1529 cp
->fcoe_crc32
= cpu_to_le32(~crc
);
1531 if (skb_is_nonlinear(skb
)) {
1532 kunmap_atomic(cp
, KM_SKB_DATA_SOFTIRQ
);
1536 /* adjust skb network/transport offsets to match mac/fcoe/port */
1537 skb_push(skb
, elen
+ hlen
);
1538 skb_reset_mac_header(skb
);
1539 skb_reset_network_header(skb
);
1540 skb
->mac_len
= elen
;
1541 skb
->protocol
= htons(ETH_P_FCOE
);
1542 skb
->dev
= fcoe
->netdev
;
1544 /* fill up mac and fcoe headers */
1546 eh
->h_proto
= htons(ETH_P_FCOE
);
1547 memcpy(eh
->h_dest
, fcoe
->ctlr
.dest_addr
, ETH_ALEN
);
1548 if (fcoe
->ctlr
.map_dest
)
1549 memcpy(eh
->h_dest
+ 3, fh
->fh_d_id
, 3);
1551 if (unlikely(fcoe
->ctlr
.flogi_oxid
!= FC_XID_UNKNOWN
))
1552 memcpy(eh
->h_source
, fcoe
->ctlr
.ctl_src_addr
, ETH_ALEN
);
1554 memcpy(eh
->h_source
, port
->data_src_addr
, ETH_ALEN
);
1556 hp
= (struct fcoe_hdr
*)(eh
+ 1);
1557 memset(hp
, 0, sizeof(*hp
));
1559 FC_FCOE_ENCAPS_VER(hp
, FC_FCOE_VER
);
1562 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1563 if (lport
->seq_offload
&& fr_max_payload(fp
)) {
1564 skb_shinfo(skb
)->gso_type
= SKB_GSO_FCOE
;
1565 skb_shinfo(skb
)->gso_size
= fr_max_payload(fp
);
1567 skb_shinfo(skb
)->gso_type
= 0;
1568 skb_shinfo(skb
)->gso_size
= 0;
1570 /* update tx stats: regardless if LLD fails */
1571 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1573 stats
->TxWords
+= wlen
;
1576 /* send down to lld */
1578 fcoe_port_send(port
, skb
);
1583 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1584 * @skb: The completed skb (argument required by destructor)
1586 static void fcoe_percpu_flush_done(struct sk_buff
*skb
)
1588 complete(&fcoe_flush_completion
);
1592 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1593 * @lport: The local port the frame was received on
1594 * @fp: The received frame
1596 * Return: 0 on passing filtering checks
1598 static inline int fcoe_filter_frames(struct fc_lport
*lport
,
1599 struct fc_frame
*fp
)
1601 struct fcoe_interface
*fcoe
;
1602 struct fc_frame_header
*fh
;
1603 struct sk_buff
*skb
= (struct sk_buff
*)fp
;
1604 struct fcoe_dev_stats
*stats
;
1607 * We only check CRC if no offload is available and if it is
1608 * it's solicited data, in which case, the FCP layer would
1609 * check it during the copy.
1611 if (lport
->crc_offload
&& skb
->ip_summed
== CHECKSUM_UNNECESSARY
)
1612 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1614 fr_flags(fp
) |= FCPHF_CRC_UNCHECKED
;
1616 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1617 fh
= fc_frame_header_get(fp
);
1618 if (fh
->fh_r_ctl
== FC_RCTL_DD_SOL_DATA
&& fh
->fh_type
== FC_TYPE_FCP
)
1621 fcoe
= ((struct fcoe_port
*)lport_priv(lport
))->priv
;
1622 if (is_fip_mode(&fcoe
->ctlr
) && fc_frame_payload_op(fp
) == ELS_LOGO
&&
1623 ntoh24(fh
->fh_s_id
) == FC_FID_FLOGI
) {
1624 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1628 if (!(fr_flags(fp
) & FCPHF_CRC_UNCHECKED
) ||
1629 le32_to_cpu(fr_crc(fp
)) == ~crc32(~0, skb
->data
, skb
->len
)) {
1630 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1634 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1635 stats
->InvalidCRCCount
++;
1636 if (stats
->InvalidCRCCount
< 5)
1637 printk(KERN_WARNING
"fcoe: dropping frame with CRC error\n");
1643 * fcoe_recv_frame() - process a single received frame
1644 * @skb: frame to process
1646 static void fcoe_recv_frame(struct sk_buff
*skb
)
1649 struct fc_lport
*lport
;
1650 struct fcoe_rcv_info
*fr
;
1651 struct fcoe_dev_stats
*stats
;
1652 struct fcoe_crc_eof crc_eof
;
1653 struct fc_frame
*fp
;
1654 struct fcoe_port
*port
;
1655 struct fcoe_hdr
*hp
;
1657 fr
= fcoe_dev_from_skb(skb
);
1659 if (unlikely(!lport
)) {
1660 if (skb
->destructor
!= fcoe_percpu_flush_done
)
1661 FCOE_NETDEV_DBG(skb
->dev
, "NULL lport in skb");
1666 FCOE_NETDEV_DBG(skb
->dev
, "skb_info: len:%d data_len:%d "
1667 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1668 skb
->len
, skb
->data_len
,
1669 skb
->head
, skb
->data
, skb_tail_pointer(skb
),
1670 skb_end_pointer(skb
), skb
->csum
,
1671 skb
->dev
? skb
->dev
->name
: "<NULL>");
1673 port
= lport_priv(lport
);
1674 if (skb_is_nonlinear(skb
))
1675 skb_linearize(skb
); /* not ideal */
1678 * Frame length checks and setting up the header pointers
1679 * was done in fcoe_rcv already.
1681 hp
= (struct fcoe_hdr
*) skb_network_header(skb
);
1683 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1684 if (unlikely(FC_FCOE_DECAPS_VER(hp
) != FC_FCOE_VER
)) {
1685 if (stats
->ErrorFrames
< 5)
1686 printk(KERN_WARNING
"fcoe: FCoE version "
1687 "mismatch: The frame has "
1688 "version %x, but the "
1689 "initiator supports version "
1690 "%x\n", FC_FCOE_DECAPS_VER(hp
),
1695 skb_pull(skb
, sizeof(struct fcoe_hdr
));
1696 fr_len
= skb
->len
- sizeof(struct fcoe_crc_eof
);
1699 stats
->RxWords
+= fr_len
/ FCOE_WORD_TO_BYTE
;
1701 fp
= (struct fc_frame
*)skb
;
1704 fr_sof(fp
) = hp
->fcoe_sof
;
1706 /* Copy out the CRC and EOF trailer for access */
1707 if (skb_copy_bits(skb
, fr_len
, &crc_eof
, sizeof(crc_eof
)))
1709 fr_eof(fp
) = crc_eof
.fcoe_eof
;
1710 fr_crc(fp
) = crc_eof
.fcoe_crc32
;
1711 if (pskb_trim(skb
, fr_len
))
1714 if (!fcoe_filter_frames(lport
, fp
)) {
1716 fc_exch_recv(lport
, fp
);
1720 stats
->ErrorFrames
++;
1726 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1727 * @arg: The per-CPU context
1729 * Return: 0 for success
1731 int fcoe_percpu_receive_thread(void *arg
)
1733 struct fcoe_percpu_s
*p
= arg
;
1734 struct sk_buff
*skb
;
1736 set_user_nice(current
, -20);
1738 while (!kthread_should_stop()) {
1740 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1741 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) == NULL
) {
1742 set_current_state(TASK_INTERRUPTIBLE
);
1743 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1745 set_current_state(TASK_RUNNING
);
1746 if (kthread_should_stop())
1748 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1750 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1751 fcoe_recv_frame(skb
);
1757 * fcoe_dev_setup() - Setup the link change notification interface
1759 static void fcoe_dev_setup(void)
1761 register_netdevice_notifier(&fcoe_notifier
);
1765 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1767 static void fcoe_dev_cleanup(void)
1769 unregister_netdevice_notifier(&fcoe_notifier
);
1773 * fcoe_device_notification() - Handler for net device events
1774 * @notifier: The context of the notification
1775 * @event: The type of event
1776 * @ptr: The net device that the event was on
1778 * This function is called by the Ethernet driver in case of link change event.
1780 * Returns: 0 for success
1782 static int fcoe_device_notification(struct notifier_block
*notifier
,
1783 ulong event
, void *ptr
)
1785 struct fc_lport
*lport
= NULL
;
1786 struct net_device
*netdev
= ptr
;
1787 struct fcoe_interface
*fcoe
;
1788 struct fcoe_port
*port
;
1789 struct fcoe_dev_stats
*stats
;
1790 u32 link_possible
= 1;
1794 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
1795 if (fcoe
->netdev
== netdev
) {
1796 lport
= fcoe
->ctlr
.lp
;
1807 case NETDEV_GOING_DOWN
:
1813 case NETDEV_CHANGEMTU
:
1814 if (netdev
->features
& NETIF_F_FCOE_MTU
)
1816 mfs
= netdev
->mtu
- (sizeof(struct fcoe_hdr
) +
1817 sizeof(struct fcoe_crc_eof
));
1818 if (mfs
>= FC_MIN_MAX_FRAME
)
1819 fc_set_mfs(lport
, mfs
);
1821 case NETDEV_REGISTER
:
1823 case NETDEV_UNREGISTER
:
1824 list_del(&fcoe
->list
);
1825 port
= lport_priv(fcoe
->ctlr
.lp
);
1826 queue_work(fcoe_wq
, &port
->destroy_work
);
1829 case NETDEV_FEAT_CHANGE
:
1830 fcoe_netdev_features_change(lport
, netdev
);
1833 FCOE_NETDEV_DBG(netdev
, "Unknown event %ld "
1834 "from netdev netlink\n", event
);
1837 fcoe_link_speed_update(lport
);
1839 if (link_possible
&& !fcoe_link_ok(lport
))
1840 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1841 else if (fcoe_ctlr_link_down(&fcoe
->ctlr
)) {
1842 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1843 stats
->LinkFailureCount
++;
1845 fcoe_clean_pending_queue(lport
);
1852 * fcoe_disable() - Disables a FCoE interface
1853 * @netdev : The net_device object the Ethernet interface to create on
1855 * Called from fcoe transport.
1857 * Returns: 0 for success
1859 static int fcoe_disable(struct net_device
*netdev
)
1861 struct fcoe_interface
*fcoe
;
1864 mutex_lock(&fcoe_config_mutex
);
1867 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1871 fcoe_ctlr_link_down(&fcoe
->ctlr
);
1872 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
1876 mutex_unlock(&fcoe_config_mutex
);
1881 * fcoe_enable() - Enables a FCoE interface
1882 * @netdev : The net_device object the Ethernet interface to create on
1884 * Called from fcoe transport.
1886 * Returns: 0 for success
1888 static int fcoe_enable(struct net_device
*netdev
)
1890 struct fcoe_interface
*fcoe
;
1893 mutex_lock(&fcoe_config_mutex
);
1895 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1900 else if (!fcoe_link_ok(fcoe
->ctlr
.lp
))
1901 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1903 mutex_unlock(&fcoe_config_mutex
);
1908 * fcoe_destroy() - Destroy a FCoE interface
1909 * @netdev : The net_device object the Ethernet interface to create on
1911 * Called from fcoe transport
1913 * Returns: 0 for success
1915 static int fcoe_destroy(struct net_device
*netdev
)
1917 struct fcoe_interface
*fcoe
;
1918 struct fc_lport
*lport
;
1919 struct fcoe_port
*port
;
1922 mutex_lock(&fcoe_config_mutex
);
1924 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1929 lport
= fcoe
->ctlr
.lp
;
1930 port
= lport_priv(lport
);
1931 list_del(&fcoe
->list
);
1932 queue_work(fcoe_wq
, &port
->destroy_work
);
1935 mutex_unlock(&fcoe_config_mutex
);
1940 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1941 * @work: Handle to the FCoE port to be destroyed
1943 static void fcoe_destroy_work(struct work_struct
*work
)
1945 struct fcoe_port
*port
;
1946 struct fcoe_interface
*fcoe
;
1949 port
= container_of(work
, struct fcoe_port
, destroy_work
);
1950 mutex_lock(&fcoe_config_mutex
);
1952 /* set if this is an NPIV port */
1953 npiv
= port
->lport
->vport
? 1 : 0;
1956 fcoe_if_destroy(port
->lport
);
1958 /* Do not tear down the fcoe interface for NPIV port */
1960 fcoe_interface_cleanup(fcoe
);
1962 mutex_unlock(&fcoe_config_mutex
);
1966 * fcoe_match() - Check if the FCoE is supported on the given netdevice
1967 * @netdev : The net_device object the Ethernet interface to create on
1969 * Called from fcoe transport.
1971 * Returns: always returns true as this is the default FCoE transport,
1972 * i.e., support all netdevs.
1974 static bool fcoe_match(struct net_device
*netdev
)
1980 * fcoe_create() - Create a fcoe interface
1981 * @netdev : The net_device object the Ethernet interface to create on
1982 * @fip_mode: The FIP mode for this creation
1984 * Called from fcoe transport
1986 * Returns: 0 for success
1988 static int fcoe_create(struct net_device
*netdev
, enum fip_state fip_mode
)
1991 struct fcoe_interface
*fcoe
;
1992 struct fc_lport
*lport
;
1994 mutex_lock(&fcoe_config_mutex
);
1997 /* look for existing lport */
1998 if (fcoe_hostlist_lookup(netdev
)) {
2003 fcoe
= fcoe_interface_create(netdev
, fip_mode
);
2009 lport
= fcoe_if_create(fcoe
, &netdev
->dev
, 0);
2010 if (IS_ERR(lport
)) {
2011 printk(KERN_ERR
"fcoe: Failed to create interface (%s)\n",
2015 fcoe_interface_cleanup(fcoe
);
2019 /* Make this the "master" N_Port */
2020 fcoe
->ctlr
.lp
= lport
;
2022 /* add to lports list */
2023 fcoe_hostlist_add(lport
);
2025 /* start FIP Discovery and FLOGI */
2026 lport
->boot_time
= jiffies
;
2027 fc_fabric_login(lport
);
2028 if (!fcoe_link_ok(lport
))
2029 fcoe_ctlr_link_up(&fcoe
->ctlr
);
2034 mutex_unlock(&fcoe_config_mutex
);
2039 * fcoe_link_speed_update() - Update the supported and actual link speeds
2040 * @lport: The local port to update speeds for
2042 * Returns: 0 if the ethtool query was successful
2043 * -1 if the ethtool query failed
2045 int fcoe_link_speed_update(struct fc_lport
*lport
)
2047 struct net_device
*netdev
= fcoe_netdev(lport
);
2048 struct ethtool_cmd ecmd
;
2050 if (!dev_ethtool_get_settings(netdev
, &ecmd
)) {
2051 lport
->link_supported_speeds
&=
2052 ~(FC_PORTSPEED_1GBIT
| FC_PORTSPEED_10GBIT
);
2053 if (ecmd
.supported
& (SUPPORTED_1000baseT_Half
|
2054 SUPPORTED_1000baseT_Full
))
2055 lport
->link_supported_speeds
|= FC_PORTSPEED_1GBIT
;
2056 if (ecmd
.supported
& SUPPORTED_10000baseT_Full
)
2057 lport
->link_supported_speeds
|=
2058 FC_PORTSPEED_10GBIT
;
2059 switch (ethtool_cmd_speed(&ecmd
)) {
2061 lport
->link_speed
= FC_PORTSPEED_1GBIT
;
2064 lport
->link_speed
= FC_PORTSPEED_10GBIT
;
2073 * fcoe_link_ok() - Check if the link is OK for a local port
2074 * @lport: The local port to check link on
2076 * Returns: 0 if link is UP and OK, -1 if not
2079 int fcoe_link_ok(struct fc_lport
*lport
)
2081 struct net_device
*netdev
= fcoe_netdev(lport
);
2083 if (netif_oper_up(netdev
))
2089 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2090 * @lport: The local port whose skbs are to be cleared
2092 * Must be called with fcoe_create_mutex held to single-thread completion.
2094 * This flushes the pending skbs by adding a new skb to each queue and
2095 * waiting until they are all freed. This assures us that not only are
2096 * there no packets that will be handled by the lport, but also that any
2097 * threads already handling packet have returned.
2099 void fcoe_percpu_clean(struct fc_lport
*lport
)
2101 struct fcoe_percpu_s
*pp
;
2102 struct fcoe_rcv_info
*fr
;
2103 struct sk_buff_head
*list
;
2104 struct sk_buff
*skb
, *next
;
2105 struct sk_buff
*head
;
2108 for_each_possible_cpu(cpu
) {
2109 pp
= &per_cpu(fcoe_percpu
, cpu
);
2110 spin_lock_bh(&pp
->fcoe_rx_list
.lock
);
2111 list
= &pp
->fcoe_rx_list
;
2113 for (skb
= head
; skb
!= (struct sk_buff
*)list
;
2116 fr
= fcoe_dev_from_skb(skb
);
2117 if (fr
->fr_dev
== lport
) {
2118 __skb_unlink(skb
, list
);
2123 if (!pp
->thread
|| !cpu_online(cpu
)) {
2124 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2128 skb
= dev_alloc_skb(0);
2130 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2133 skb
->destructor
= fcoe_percpu_flush_done
;
2135 __skb_queue_tail(&pp
->fcoe_rx_list
, skb
);
2136 if (pp
->fcoe_rx_list
.qlen
== 1)
2137 wake_up_process(pp
->thread
);
2138 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2140 wait_for_completion(&fcoe_flush_completion
);
2145 * fcoe_reset() - Reset a local port
2146 * @shost: The SCSI host associated with the local port to be reset
2148 * Returns: Always 0 (return value required by FC transport template)
2150 int fcoe_reset(struct Scsi_Host
*shost
)
2152 struct fc_lport
*lport
= shost_priv(shost
);
2153 struct fcoe_port
*port
= lport_priv(lport
);
2154 struct fcoe_interface
*fcoe
= port
->priv
;
2156 fcoe_ctlr_link_down(&fcoe
->ctlr
);
2157 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
2158 if (!fcoe_link_ok(fcoe
->ctlr
.lp
))
2159 fcoe_ctlr_link_up(&fcoe
->ctlr
);
2164 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2165 * @netdev: The net device used as a key
2167 * Locking: Must be called with the RNL mutex held.
2169 * Returns: NULL or the FCoE interface
2171 static struct fcoe_interface
*
2172 fcoe_hostlist_lookup_port(const struct net_device
*netdev
)
2174 struct fcoe_interface
*fcoe
;
2176 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
2177 if (fcoe
->netdev
== netdev
)
2184 * fcoe_hostlist_lookup() - Find the local port associated with a
2186 * @netdev: The netdevice used as a key
2188 * Locking: Must be called with the RTNL mutex held
2190 * Returns: NULL or the local port
2192 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*netdev
)
2194 struct fcoe_interface
*fcoe
;
2196 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2197 return (fcoe
) ? fcoe
->ctlr
.lp
: NULL
;
2201 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2202 * port to the hostlist
2203 * @lport: The local port that identifies the FCoE interface to be added
2205 * Locking: must be called with the RTNL mutex held
2207 * Returns: 0 for success
2209 static int fcoe_hostlist_add(const struct fc_lport
*lport
)
2211 struct fcoe_interface
*fcoe
;
2212 struct fcoe_port
*port
;
2214 fcoe
= fcoe_hostlist_lookup_port(fcoe_netdev(lport
));
2216 port
= lport_priv(lport
);
2218 list_add_tail(&fcoe
->list
, &fcoe_hostlist
);
2224 static struct fcoe_transport fcoe_sw_transport
= {
2225 .name
= {FCOE_TRANSPORT_DEFAULT
},
2227 .list
= LIST_HEAD_INIT(fcoe_sw_transport
.list
),
2228 .match
= fcoe_match
,
2229 .create
= fcoe_create
,
2230 .destroy
= fcoe_destroy
,
2231 .enable
= fcoe_enable
,
2232 .disable
= fcoe_disable
,
2236 * fcoe_init() - Initialize fcoe.ko
2238 * Returns: 0 on success, or a negative value on failure
2240 static int __init
fcoe_init(void)
2242 struct fcoe_percpu_s
*p
;
2246 fcoe_wq
= alloc_workqueue("fcoe", 0, 0);
2250 /* register as a fcoe transport */
2251 rc
= fcoe_transport_attach(&fcoe_sw_transport
);
2253 printk(KERN_ERR
"failed to register an fcoe transport, check "
2254 "if libfcoe is loaded\n");
2258 mutex_lock(&fcoe_config_mutex
);
2260 for_each_possible_cpu(cpu
) {
2261 p
= &per_cpu(fcoe_percpu
, cpu
);
2262 skb_queue_head_init(&p
->fcoe_rx_list
);
2265 for_each_online_cpu(cpu
)
2266 fcoe_percpu_thread_create(cpu
);
2268 /* Initialize per CPU interrupt thread */
2269 rc
= register_hotcpu_notifier(&fcoe_cpu_notifier
);
2273 /* Setup link change notification */
2276 rc
= fcoe_if_init();
2280 mutex_unlock(&fcoe_config_mutex
);
2284 for_each_online_cpu(cpu
) {
2285 fcoe_percpu_thread_destroy(cpu
);
2287 mutex_unlock(&fcoe_config_mutex
);
2288 destroy_workqueue(fcoe_wq
);
2291 module_init(fcoe_init
);
2294 * fcoe_exit() - Clean up fcoe.ko
2296 * Returns: 0 on success or a negative value on failure
2298 static void __exit
fcoe_exit(void)
2300 struct fcoe_interface
*fcoe
, *tmp
;
2301 struct fcoe_port
*port
;
2304 mutex_lock(&fcoe_config_mutex
);
2308 /* releases the associated fcoe hosts */
2310 list_for_each_entry_safe(fcoe
, tmp
, &fcoe_hostlist
, list
) {
2311 list_del(&fcoe
->list
);
2312 port
= lport_priv(fcoe
->ctlr
.lp
);
2313 queue_work(fcoe_wq
, &port
->destroy_work
);
2317 unregister_hotcpu_notifier(&fcoe_cpu_notifier
);
2319 for_each_online_cpu(cpu
)
2320 fcoe_percpu_thread_destroy(cpu
);
2322 mutex_unlock(&fcoe_config_mutex
);
2325 * destroy_work's may be chained but destroy_workqueue()
2326 * can take care of them. Just kill the fcoe_wq.
2328 destroy_workqueue(fcoe_wq
);
2331 * Detaching from the scsi transport must happen after all
2332 * destroys are done on the fcoe_wq. destroy_workqueue will
2333 * enusre the fcoe_wq is flushed.
2337 /* detach from fcoe transport */
2338 fcoe_transport_detach(&fcoe_sw_transport
);
2340 module_exit(fcoe_exit
);
2343 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2344 * @seq: active sequence in the FLOGI or FDISC exchange
2345 * @fp: response frame, or error encoded in a pointer (timeout)
2346 * @arg: pointer the the fcoe_ctlr structure
2348 * This handles MAC address management for FCoE, then passes control on to
2349 * the libfc FLOGI response handler.
2351 static void fcoe_flogi_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2353 struct fcoe_ctlr
*fip
= arg
;
2354 struct fc_exch
*exch
= fc_seq_exch(seq
);
2355 struct fc_lport
*lport
= exch
->lp
;
2361 mac
= fr_cb(fp
)->granted_mac
;
2362 if (is_zero_ether_addr(mac
)) {
2364 if (fcoe_ctlr_recv_flogi(fip
, lport
, fp
)) {
2369 fcoe_update_src_mac(lport
, mac
);
2371 fc_lport_flogi_resp(seq
, fp
, lport
);
2375 * fcoe_logo_resp() - FCoE specific LOGO response handler
2376 * @seq: active sequence in the LOGO exchange
2377 * @fp: response frame, or error encoded in a pointer (timeout)
2378 * @arg: pointer the the fcoe_ctlr structure
2380 * This handles MAC address management for FCoE, then passes control on to
2381 * the libfc LOGO response handler.
2383 static void fcoe_logo_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2385 struct fc_lport
*lport
= arg
;
2386 static u8 zero_mac
[ETH_ALEN
] = { 0 };
2389 fcoe_update_src_mac(lport
, zero_mac
);
2390 fc_lport_logo_resp(seq
, fp
, lport
);
2394 * fcoe_elsct_send - FCoE specific ELS handler
2396 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2397 * using FCoE specific response handlers and passing the FIP controller as
2398 * the argument (the lport is still available from the exchange).
2400 * Most of the work here is just handed off to the libfc routine.
2402 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*lport
, u32 did
,
2403 struct fc_frame
*fp
, unsigned int op
,
2404 void (*resp
)(struct fc_seq
*,
2407 void *arg
, u32 timeout
)
2409 struct fcoe_port
*port
= lport_priv(lport
);
2410 struct fcoe_interface
*fcoe
= port
->priv
;
2411 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
2412 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
2417 if (lport
->point_to_multipoint
)
2419 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_flogi_resp
,
2422 /* only hook onto fabric logouts, not port logouts */
2423 if (ntoh24(fh
->fh_d_id
) != FC_FID_FLOGI
)
2425 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_logo_resp
,
2428 return fc_elsct_send(lport
, did
, fp
, op
, resp
, arg
, timeout
);
2432 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2433 * @vport: fc_vport object to create a new fc_host for
2434 * @disabled: start the new fc_host in a disabled state by default?
2436 * Returns: 0 for success
2438 static int fcoe_vport_create(struct fc_vport
*vport
, bool disabled
)
2440 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2441 struct fc_lport
*n_port
= shost_priv(shost
);
2442 struct fcoe_port
*port
= lport_priv(n_port
);
2443 struct fcoe_interface
*fcoe
= port
->priv
;
2444 struct net_device
*netdev
= fcoe
->netdev
;
2445 struct fc_lport
*vn_port
;
2449 rc
= fcoe_validate_vport_create(vport
);
2451 wwn_to_str(vport
->port_name
, buf
, sizeof(buf
));
2452 printk(KERN_ERR
"fcoe: Failed to create vport, "
2453 "WWPN (0x%s) already exists\n",
2458 mutex_lock(&fcoe_config_mutex
);
2459 vn_port
= fcoe_if_create(fcoe
, &vport
->dev
, 1);
2460 mutex_unlock(&fcoe_config_mutex
);
2462 if (IS_ERR(vn_port
)) {
2463 printk(KERN_ERR
"fcoe: fcoe_vport_create(%s) failed\n",
2469 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2471 vn_port
->boot_time
= jiffies
;
2472 fc_fabric_login(vn_port
);
2473 fc_vport_setlink(vn_port
);
2479 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2480 * @vport: fc_vport object that is being destroyed
2482 * Returns: 0 for success
2484 static int fcoe_vport_destroy(struct fc_vport
*vport
)
2486 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2487 struct fc_lport
*n_port
= shost_priv(shost
);
2488 struct fc_lport
*vn_port
= vport
->dd_data
;
2489 struct fcoe_port
*port
= lport_priv(vn_port
);
2491 mutex_lock(&n_port
->lp_mutex
);
2492 list_del(&vn_port
->list
);
2493 mutex_unlock(&n_port
->lp_mutex
);
2494 queue_work(fcoe_wq
, &port
->destroy_work
);
2499 * fcoe_vport_disable() - change vport state
2500 * @vport: vport to bring online/offline
2501 * @disable: should the vport be disabled?
2503 static int fcoe_vport_disable(struct fc_vport
*vport
, bool disable
)
2505 struct fc_lport
*lport
= vport
->dd_data
;
2508 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2509 fc_fabric_logoff(lport
);
2511 lport
->boot_time
= jiffies
;
2512 fc_fabric_login(lport
);
2513 fc_vport_setlink(lport
);
2520 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2521 * @vport: fc_vport with a new symbolic name string
2523 * After generating a new symbolic name string, a new RSPN_ID request is
2524 * sent to the name server. There is no response handler, so if it fails
2525 * for some reason it will not be retried.
2527 static void fcoe_set_vport_symbolic_name(struct fc_vport
*vport
)
2529 struct fc_lport
*lport
= vport
->dd_data
;
2530 struct fc_frame
*fp
;
2533 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
2534 "%s v%s over %s : %s", FCOE_NAME
, FCOE_VERSION
,
2535 fcoe_netdev(lport
)->name
, vport
->symbolic_name
);
2537 if (lport
->state
!= LPORT_ST_READY
)
2540 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
2541 fp
= fc_frame_alloc(lport
,
2542 sizeof(struct fc_ct_hdr
) +
2543 sizeof(struct fc_ns_rspn
) + len
);
2546 lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, FC_NS_RSPN_ID
,
2547 NULL
, NULL
, 3 * lport
->r_a_tov
);
2551 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2552 * @lport: the local port
2553 * @fc_lesb: the link error status block
2555 static void fcoe_get_lesb(struct fc_lport
*lport
,
2556 struct fc_els_lesb
*fc_lesb
)
2559 u32 lfc
, vlfc
, mdac
;
2560 struct fcoe_dev_stats
*devst
;
2561 struct fcoe_fc_els_lesb
*lesb
;
2562 struct rtnl_link_stats64 temp
;
2563 struct net_device
*netdev
= fcoe_netdev(lport
);
2568 lesb
= (struct fcoe_fc_els_lesb
*)fc_lesb
;
2569 memset(lesb
, 0, sizeof(*lesb
));
2570 for_each_possible_cpu(cpu
) {
2571 devst
= per_cpu_ptr(lport
->dev_stats
, cpu
);
2572 lfc
+= devst
->LinkFailureCount
;
2573 vlfc
+= devst
->VLinkFailureCount
;
2574 mdac
+= devst
->MissDiscAdvCount
;
2576 lesb
->lesb_link_fail
= htonl(lfc
);
2577 lesb
->lesb_vlink_fail
= htonl(vlfc
);
2578 lesb
->lesb_miss_fka
= htonl(mdac
);
2579 lesb
->lesb_fcs_error
= htonl(dev_get_stats(netdev
, &temp
)->rx_crc_errors
);
2583 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2584 * @lport: the local port
2585 * @port_id: the port ID
2586 * @fp: the received frame, if any, that caused the port_id to be set.
2588 * This routine handles the case where we received a FLOGI and are
2589 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2590 * so it can set the non-mapped mode and gateway address.
2592 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2594 static void fcoe_set_port_id(struct fc_lport
*lport
,
2595 u32 port_id
, struct fc_frame
*fp
)
2597 struct fcoe_port
*port
= lport_priv(lport
);
2598 struct fcoe_interface
*fcoe
= port
->priv
;
2600 if (fp
&& fc_frame_payload_op(fp
) == ELS_FLOGI
)
2601 fcoe_ctlr_recv_flogi(&fcoe
->ctlr
, lport
, fp
);
2605 * fcoe_validate_vport_create() - Validate a vport before creating it
2606 * @vport: NPIV port to be created
2608 * This routine is meant to add validation for a vport before creating it
2609 * via fcoe_vport_create().
2610 * Current validations are:
2611 * - WWPN supplied is unique for given lport
2615 static int fcoe_validate_vport_create(struct fc_vport
*vport
)
2617 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2618 struct fc_lport
*n_port
= shost_priv(shost
);
2619 struct fc_lport
*vn_port
;
2623 mutex_lock(&n_port
->lp_mutex
);
2625 wwn_to_str(vport
->port_name
, buf
, sizeof(buf
));
2626 /* Check if the wwpn is not same as that of the lport */
2627 if (!memcmp(&n_port
->wwpn
, &vport
->port_name
, sizeof(u64
))) {
2628 FCOE_DBG("vport WWPN 0x%s is same as that of the "
2629 "base port WWPN\n", buf
);
2634 /* Check if there is any existing vport with same wwpn */
2635 list_for_each_entry(vn_port
, &n_port
->vports
, list
) {
2636 if (!memcmp(&vn_port
->wwpn
, &vport
->port_name
, sizeof(u64
))) {
2637 FCOE_DBG("vport with given WWPN 0x%s already "
2645 mutex_unlock(&n_port
->lp_mutex
);