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/cpu.h>
31 #include <linux/sysfs.h>
32 #include <linux/ctype.h>
33 #include <scsi/scsi_tcq.h>
34 #include <scsi/scsicam.h>
35 #include <scsi/scsi_transport.h>
36 #include <scsi/scsi_transport_fc.h>
37 #include <net/rtnetlink.h>
39 #include <scsi/fc/fc_encaps.h>
40 #include <scsi/fc/fc_fip.h>
42 #include <scsi/libfc.h>
43 #include <scsi/fc_frame.h>
44 #include <scsi/libfcoe.h>
48 MODULE_AUTHOR("Open-FCoE.org");
49 MODULE_DESCRIPTION("FCoE");
50 MODULE_LICENSE("GPL v2");
52 /* Performance tuning parameters for fcoe */
53 static unsigned int fcoe_ddp_min
;
54 module_param_named(ddp_min
, fcoe_ddp_min
, uint
, S_IRUGO
| S_IWUSR
);
55 MODULE_PARM_DESC(ddp_min
, "Minimum I/O size in bytes for " \
56 "Direct Data Placement (DDP).");
58 DEFINE_MUTEX(fcoe_config_mutex
);
60 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
61 static DECLARE_COMPLETION(fcoe_flush_completion
);
64 /* must only by accessed under the RTNL mutex */
65 LIST_HEAD(fcoe_hostlist
);
66 DEFINE_PER_CPU(struct fcoe_percpu_s
, fcoe_percpu
);
68 /* Function Prototypes */
69 static int fcoe_reset(struct Scsi_Host
*);
70 static int fcoe_xmit(struct fc_lport
*, struct fc_frame
*);
71 static int fcoe_rcv(struct sk_buff
*, struct net_device
*,
72 struct packet_type
*, struct net_device
*);
73 static int fcoe_percpu_receive_thread(void *);
74 static void fcoe_clean_pending_queue(struct fc_lport
*);
75 static void fcoe_percpu_clean(struct fc_lport
*);
76 static int fcoe_link_ok(struct fc_lport
*);
78 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*);
79 static int fcoe_hostlist_add(const struct fc_lport
*);
81 static void fcoe_check_wait_queue(struct fc_lport
*, struct sk_buff
*);
82 static int fcoe_device_notification(struct notifier_block
*, ulong
, void *);
83 static void fcoe_dev_setup(void);
84 static void fcoe_dev_cleanup(void);
85 static struct fcoe_interface
86 *fcoe_hostlist_lookup_port(const struct net_device
*);
88 static int fcoe_fip_recv(struct sk_buff
*, struct net_device
*,
89 struct packet_type
*, struct net_device
*);
91 static void fcoe_fip_send(struct fcoe_ctlr
*, struct sk_buff
*);
92 static void fcoe_update_src_mac(struct fc_lport
*, u8
*);
93 static u8
*fcoe_get_src_mac(struct fc_lport
*);
94 static void fcoe_destroy_work(struct work_struct
*);
96 static int fcoe_ddp_setup(struct fc_lport
*, u16
, struct scatterlist
*,
98 static int fcoe_ddp_done(struct fc_lport
*, u16
);
100 static int fcoe_cpu_callback(struct notifier_block
*, unsigned long, void *);
102 static int fcoe_create(const char *, struct kernel_param
*);
103 static int fcoe_destroy(const char *, struct kernel_param
*);
105 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*,
106 u32 did
, struct fc_frame
*,
108 void (*resp
)(struct fc_seq
*,
111 void *, u32 timeout
);
113 module_param_call(create
, fcoe_create
, NULL
, NULL
, S_IWUSR
);
114 __MODULE_PARM_TYPE(create
, "string");
115 MODULE_PARM_DESC(create
, "Create fcoe fcoe using net device passed in.");
116 module_param_call(destroy
, fcoe_destroy
, NULL
, NULL
, S_IWUSR
);
117 __MODULE_PARM_TYPE(destroy
, "string");
118 MODULE_PARM_DESC(destroy
, "Destroy fcoe fcoe");
120 /* notification function for packets from net device */
121 static struct notifier_block fcoe_notifier
= {
122 .notifier_call
= fcoe_device_notification
,
125 /* notification function for CPU hotplug events */
126 static struct notifier_block fcoe_cpu_notifier
= {
127 .notifier_call
= fcoe_cpu_callback
,
130 static struct scsi_transport_template
*fcoe_transport_template
;
131 static struct scsi_transport_template
*fcoe_vport_transport_template
;
133 static int fcoe_vport_destroy(struct fc_vport
*);
134 static int fcoe_vport_create(struct fc_vport
*, bool disabled
);
135 static int fcoe_vport_disable(struct fc_vport
*, bool disable
);
136 static void fcoe_set_vport_symbolic_name(struct fc_vport
*);
138 static struct libfc_function_template fcoe_libfc_fcn_templ
= {
139 .frame_send
= fcoe_xmit
,
140 .ddp_setup
= fcoe_ddp_setup
,
141 .ddp_done
= fcoe_ddp_done
,
142 .elsct_send
= fcoe_elsct_send
,
145 struct fc_function_template fcoe_transport_function
= {
146 .show_host_node_name
= 1,
147 .show_host_port_name
= 1,
148 .show_host_supported_classes
= 1,
149 .show_host_supported_fc4s
= 1,
150 .show_host_active_fc4s
= 1,
151 .show_host_maxframe_size
= 1,
153 .show_host_port_id
= 1,
154 .show_host_supported_speeds
= 1,
155 .get_host_speed
= fc_get_host_speed
,
156 .show_host_speed
= 1,
157 .show_host_port_type
= 1,
158 .get_host_port_state
= fc_get_host_port_state
,
159 .show_host_port_state
= 1,
160 .show_host_symbolic_name
= 1,
162 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
163 .show_rport_maxframe_size
= 1,
164 .show_rport_supported_classes
= 1,
166 .show_host_fabric_name
= 1,
167 .show_starget_node_name
= 1,
168 .show_starget_port_name
= 1,
169 .show_starget_port_id
= 1,
170 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
171 .show_rport_dev_loss_tmo
= 1,
172 .get_fc_host_stats
= fc_get_host_stats
,
173 .issue_fc_host_lip
= fcoe_reset
,
175 .terminate_rport_io
= fc_rport_terminate_io
,
177 .vport_create
= fcoe_vport_create
,
178 .vport_delete
= fcoe_vport_destroy
,
179 .vport_disable
= fcoe_vport_disable
,
180 .set_vport_symbolic_name
= fcoe_set_vport_symbolic_name
,
182 .bsg_request
= fc_lport_bsg_request
,
185 struct fc_function_template fcoe_vport_transport_function
= {
186 .show_host_node_name
= 1,
187 .show_host_port_name
= 1,
188 .show_host_supported_classes
= 1,
189 .show_host_supported_fc4s
= 1,
190 .show_host_active_fc4s
= 1,
191 .show_host_maxframe_size
= 1,
193 .show_host_port_id
= 1,
194 .show_host_supported_speeds
= 1,
195 .get_host_speed
= fc_get_host_speed
,
196 .show_host_speed
= 1,
197 .show_host_port_type
= 1,
198 .get_host_port_state
= fc_get_host_port_state
,
199 .show_host_port_state
= 1,
200 .show_host_symbolic_name
= 1,
202 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
203 .show_rport_maxframe_size
= 1,
204 .show_rport_supported_classes
= 1,
206 .show_host_fabric_name
= 1,
207 .show_starget_node_name
= 1,
208 .show_starget_port_name
= 1,
209 .show_starget_port_id
= 1,
210 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
211 .show_rport_dev_loss_tmo
= 1,
212 .get_fc_host_stats
= fc_get_host_stats
,
213 .issue_fc_host_lip
= fcoe_reset
,
215 .terminate_rport_io
= fc_rport_terminate_io
,
217 .bsg_request
= fc_lport_bsg_request
,
220 static struct scsi_host_template fcoe_shost_template
= {
221 .module
= THIS_MODULE
,
222 .name
= "FCoE Driver",
223 .proc_name
= FCOE_NAME
,
224 .queuecommand
= fc_queuecommand
,
225 .eh_abort_handler
= fc_eh_abort
,
226 .eh_device_reset_handler
= fc_eh_device_reset
,
227 .eh_host_reset_handler
= fc_eh_host_reset
,
228 .slave_alloc
= fc_slave_alloc
,
229 .change_queue_depth
= fc_change_queue_depth
,
230 .change_queue_type
= fc_change_queue_type
,
233 .can_queue
= FCOE_MAX_OUTSTANDING_COMMANDS
,
234 .use_clustering
= ENABLE_CLUSTERING
,
235 .sg_tablesize
= SG_ALL
,
236 .max_sectors
= 0xffff,
240 * fcoe_interface_setup() - Setup a FCoE interface
241 * @fcoe: The new FCoE interface
242 * @netdev: The net device that the fcoe interface is on
244 * Returns : 0 for success
245 * Locking: must be called with the RTNL mutex held
247 static int fcoe_interface_setup(struct fcoe_interface
*fcoe
,
248 struct net_device
*netdev
)
250 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
251 struct netdev_hw_addr
*ha
;
252 struct net_device
*real_dev
;
253 u8 flogi_maddr
[ETH_ALEN
];
254 const struct net_device_ops
*ops
;
256 fcoe
->netdev
= netdev
;
258 /* Let LLD initialize for FCoE */
259 ops
= netdev
->netdev_ops
;
260 if (ops
->ndo_fcoe_enable
) {
261 if (ops
->ndo_fcoe_enable(netdev
))
262 FCOE_NETDEV_DBG(netdev
, "Failed to enable FCoE"
263 " specific feature for LLD.\n");
266 /* Do not support for bonding device */
267 if ((netdev
->priv_flags
& IFF_MASTER_ALB
) ||
268 (netdev
->priv_flags
& IFF_SLAVE_INACTIVE
) ||
269 (netdev
->priv_flags
& IFF_MASTER_8023AD
)) {
270 FCOE_NETDEV_DBG(netdev
, "Bonded interfaces not supported\n");
274 /* look for SAN MAC address, if multiple SAN MACs exist, only
275 * use the first one for SPMA */
276 real_dev
= (netdev
->priv_flags
& IFF_802_1Q_VLAN
) ?
277 vlan_dev_real_dev(netdev
) : netdev
;
279 for_each_dev_addr(real_dev
, ha
) {
280 if ((ha
->type
== NETDEV_HW_ADDR_T_SAN
) &&
281 (is_valid_ether_addr(ha
->addr
))) {
282 memcpy(fip
->ctl_src_addr
, ha
->addr
, ETH_ALEN
);
289 /* setup Source Mac Address */
291 memcpy(fip
->ctl_src_addr
, netdev
->dev_addr
, netdev
->addr_len
);
294 * Add FCoE MAC address as second unicast MAC address
295 * or enter promiscuous mode if not capable of listening
296 * for multiple unicast MACs.
298 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
299 dev_unicast_add(netdev
, flogi_maddr
);
301 dev_unicast_add(netdev
, fip
->ctl_src_addr
);
302 dev_mc_add(netdev
, FIP_ALL_ENODE_MACS
, ETH_ALEN
, 0);
305 * setup the receive function from ethernet driver
306 * on the ethertype for the given device
308 fcoe
->fcoe_packet_type
.func
= fcoe_rcv
;
309 fcoe
->fcoe_packet_type
.type
= __constant_htons(ETH_P_FCOE
);
310 fcoe
->fcoe_packet_type
.dev
= netdev
;
311 dev_add_pack(&fcoe
->fcoe_packet_type
);
313 fcoe
->fip_packet_type
.func
= fcoe_fip_recv
;
314 fcoe
->fip_packet_type
.type
= htons(ETH_P_FIP
);
315 fcoe
->fip_packet_type
.dev
= netdev
;
316 dev_add_pack(&fcoe
->fip_packet_type
);
322 * fcoe_interface_create() - Create a FCoE interface on a net device
323 * @netdev: The net device to create the FCoE interface on
325 * Returns: pointer to a struct fcoe_interface or NULL on error
327 static struct fcoe_interface
*fcoe_interface_create(struct net_device
*netdev
)
329 struct fcoe_interface
*fcoe
;
332 fcoe
= kzalloc(sizeof(*fcoe
), GFP_KERNEL
);
334 FCOE_NETDEV_DBG(netdev
, "Could not allocate fcoe structure\n");
339 kref_init(&fcoe
->kref
);
344 fcoe_ctlr_init(&fcoe
->ctlr
);
345 fcoe
->ctlr
.send
= fcoe_fip_send
;
346 fcoe
->ctlr
.update_mac
= fcoe_update_src_mac
;
347 fcoe
->ctlr
.get_src_addr
= fcoe_get_src_mac
;
349 err
= fcoe_interface_setup(fcoe
, netdev
);
351 fcoe_ctlr_destroy(&fcoe
->ctlr
);
361 * fcoe_interface_cleanup() - Clean up a FCoE interface
362 * @fcoe: The FCoE interface to be cleaned up
364 * Caller must be holding the RTNL mutex
366 void fcoe_interface_cleanup(struct fcoe_interface
*fcoe
)
368 struct net_device
*netdev
= fcoe
->netdev
;
369 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
370 u8 flogi_maddr
[ETH_ALEN
];
371 const struct net_device_ops
*ops
;
374 * Don't listen for Ethernet packets anymore.
375 * synchronize_net() ensures that the packet handlers are not running
376 * on another CPU. dev_remove_pack() would do that, this calls the
377 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
379 __dev_remove_pack(&fcoe
->fcoe_packet_type
);
380 __dev_remove_pack(&fcoe
->fip_packet_type
);
383 /* Delete secondary MAC addresses */
384 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
385 dev_unicast_delete(netdev
, flogi_maddr
);
387 dev_unicast_delete(netdev
, fip
->ctl_src_addr
);
388 dev_mc_delete(netdev
, FIP_ALL_ENODE_MACS
, ETH_ALEN
, 0);
390 /* Tell the LLD we are done w/ FCoE */
391 ops
= netdev
->netdev_ops
;
392 if (ops
->ndo_fcoe_disable
) {
393 if (ops
->ndo_fcoe_disable(netdev
))
394 FCOE_NETDEV_DBG(netdev
, "Failed to disable FCoE"
395 " specific feature for LLD.\n");
400 * fcoe_interface_release() - fcoe_port kref release function
401 * @kref: Embedded reference count in an fcoe_interface struct
403 static void fcoe_interface_release(struct kref
*kref
)
405 struct fcoe_interface
*fcoe
;
406 struct net_device
*netdev
;
408 fcoe
= container_of(kref
, struct fcoe_interface
, kref
);
409 netdev
= fcoe
->netdev
;
410 /* tear-down the FCoE controller */
411 fcoe_ctlr_destroy(&fcoe
->ctlr
);
417 * fcoe_interface_get() - Get a reference to a FCoE interface
418 * @fcoe: The FCoE interface to be held
420 static inline void fcoe_interface_get(struct fcoe_interface
*fcoe
)
422 kref_get(&fcoe
->kref
);
426 * fcoe_interface_put() - Put a reference to a FCoE interface
427 * @fcoe: The FCoE interface to be released
429 static inline void fcoe_interface_put(struct fcoe_interface
*fcoe
)
431 kref_put(&fcoe
->kref
, fcoe_interface_release
);
435 * fcoe_fip_recv() - Handler for received FIP frames
436 * @skb: The receive skb
437 * @netdev: The associated net device
438 * @ptype: The packet_type structure which was used to register this handler
439 * @orig_dev: The original net_device the the skb was received on.
440 * (in case dev is a bond)
442 * Returns: 0 for success
444 static int fcoe_fip_recv(struct sk_buff
*skb
, struct net_device
*netdev
,
445 struct packet_type
*ptype
,
446 struct net_device
*orig_dev
)
448 struct fcoe_interface
*fcoe
;
450 fcoe
= container_of(ptype
, struct fcoe_interface
, fip_packet_type
);
451 fcoe_ctlr_recv(&fcoe
->ctlr
, skb
);
456 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
457 * @fip: The FCoE controller
458 * @skb: The FIP packet to be sent
460 static void fcoe_fip_send(struct fcoe_ctlr
*fip
, struct sk_buff
*skb
)
462 skb
->dev
= fcoe_from_ctlr(fip
)->netdev
;
467 * fcoe_update_src_mac() - Update the Ethernet MAC filters
468 * @lport: The local port to update the source MAC on
469 * @addr: Unicast MAC address to add
471 * Remove any previously-set unicast MAC filter.
472 * Add secondary FCoE MAC address filter for our OUI.
474 static void fcoe_update_src_mac(struct fc_lport
*lport
, u8
*addr
)
476 struct fcoe_port
*port
= lport_priv(lport
);
477 struct fcoe_interface
*fcoe
= port
->fcoe
;
480 if (!is_zero_ether_addr(port
->data_src_addr
))
481 dev_unicast_delete(fcoe
->netdev
, port
->data_src_addr
);
482 if (!is_zero_ether_addr(addr
))
483 dev_unicast_add(fcoe
->netdev
, addr
);
484 memcpy(port
->data_src_addr
, addr
, ETH_ALEN
);
489 * fcoe_get_src_mac() - return the Ethernet source address for an lport
490 * @lport: libfc lport
492 static u8
*fcoe_get_src_mac(struct fc_lport
*lport
)
494 struct fcoe_port
*port
= lport_priv(lport
);
496 return port
->data_src_addr
;
500 * fcoe_lport_config() - Set up a local port
501 * @lport: The local port to be setup
503 * Returns: 0 for success
505 static int fcoe_lport_config(struct fc_lport
*lport
)
509 lport
->max_retry_count
= 3;
510 lport
->max_rport_retry_count
= 3;
511 lport
->e_d_tov
= 2 * 1000; /* FC-FS default */
512 lport
->r_a_tov
= 2 * 2 * 1000;
513 lport
->service_params
= (FCP_SPPF_INIT_FCN
| FCP_SPPF_RD_XRDY_DIS
|
514 FCP_SPPF_RETRY
| FCP_SPPF_CONF_COMPL
);
515 lport
->does_npiv
= 1;
517 fc_lport_init_stats(lport
);
519 /* lport fc_lport related configuration */
520 fc_lport_config(lport
);
522 /* offload related configuration */
523 lport
->crc_offload
= 0;
524 lport
->seq_offload
= 0;
525 lport
->lro_enabled
= 0;
533 * fcoe_queue_timer() - The fcoe queue timer
534 * @lport: The local port
536 * Calls fcoe_check_wait_queue on timeout
538 static void fcoe_queue_timer(ulong lport
)
540 fcoe_check_wait_queue((struct fc_lport
*)lport
, NULL
);
544 * fcoe_netdev_config() - Set up net devive for SW FCoE
545 * @lport: The local port that is associated with the net device
546 * @netdev: The associated net device
548 * Must be called after fcoe_lport_config() as it will use local port mutex
550 * Returns: 0 for success
552 static int fcoe_netdev_config(struct fc_lport
*lport
, struct net_device
*netdev
)
556 struct fcoe_interface
*fcoe
;
557 struct fcoe_port
*port
;
559 /* Setup lport private data to point to fcoe softc */
560 port
= lport_priv(lport
);
564 * Determine max frame size based on underlying device and optional
565 * user-configured limit. If the MFS is too low, fcoe_link_ok()
566 * will return 0, so do this first.
569 if (netdev
->features
& NETIF_F_FCOE_MTU
) {
571 FCOE_NETDEV_DBG(netdev
, "Supports FCOE_MTU of %d bytes\n", mfs
);
573 mfs
-= (sizeof(struct fcoe_hdr
) + sizeof(struct fcoe_crc_eof
));
574 if (fc_set_mfs(lport
, mfs
))
577 /* offload features support */
578 if (netdev
->features
& NETIF_F_SG
)
581 if (netdev
->features
& NETIF_F_FCOE_CRC
) {
582 lport
->crc_offload
= 1;
583 FCOE_NETDEV_DBG(netdev
, "Supports FCCRC offload\n");
585 if (netdev
->features
& NETIF_F_FSO
) {
586 lport
->seq_offload
= 1;
587 lport
->lso_max
= netdev
->gso_max_size
;
588 FCOE_NETDEV_DBG(netdev
, "Supports LSO for max len 0x%x\n",
591 if (netdev
->fcoe_ddp_xid
) {
592 lport
->lro_enabled
= 1;
593 lport
->lro_xid
= netdev
->fcoe_ddp_xid
;
594 FCOE_NETDEV_DBG(netdev
, "Supports LRO for max xid 0x%x\n",
597 skb_queue_head_init(&port
->fcoe_pending_queue
);
598 port
->fcoe_pending_queue_active
= 0;
599 setup_timer(&port
->timer
, fcoe_queue_timer
, (unsigned long)lport
);
602 wwnn
= fcoe_wwn_from_mac(netdev
->dev_addr
, 1, 0);
603 fc_set_wwnn(lport
, wwnn
);
604 /* XXX - 3rd arg needs to be vlan id */
605 wwpn
= fcoe_wwn_from_mac(netdev
->dev_addr
, 2, 0);
606 fc_set_wwpn(lport
, wwpn
);
613 * fcoe_shost_config() - Set up the SCSI host associated with a local port
614 * @lport: The local port
615 * @shost: The SCSI host to associate with the local port
616 * @dev: The device associated with the SCSI host
618 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
620 * Returns: 0 for success
622 static int fcoe_shost_config(struct fc_lport
*lport
, struct Scsi_Host
*shost
,
627 /* lport scsi host config */
628 lport
->host
->max_lun
= FCOE_MAX_LUN
;
629 lport
->host
->max_id
= FCOE_MAX_FCP_TARGET
;
630 lport
->host
->max_channel
= 0;
632 lport
->host
->transportt
= fcoe_vport_transport_template
;
634 lport
->host
->transportt
= fcoe_transport_template
;
636 /* add the new host to the SCSI-ml */
637 rc
= scsi_add_host(lport
->host
, dev
);
639 FCOE_NETDEV_DBG(fcoe_netdev(lport
), "fcoe_shost_config: "
640 "error on scsi_add_host\n");
645 fc_host_max_npiv_vports(lport
->host
) = USHORT_MAX
;
647 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
648 "%s v%s over %s", FCOE_NAME
, FCOE_VERSION
,
649 fcoe_netdev(lport
)->name
);
655 * fcoe_oem_match() - The match routine for the offloaded exchange manager
658 * This routine will be associated with an exchange manager (EM). When
659 * the libfc exchange handling code is looking for an EM to use it will
660 * call this routine and pass it the frame that it wishes to send. This
661 * routine will return True if the associated EM is to be used and False
662 * if the echange code should continue looking for an EM.
664 * The offload EM that this routine is associated with will handle any
665 * packets that are for SCSI read requests.
667 * Returns: True for read types I/O, otherwise returns false.
669 bool fcoe_oem_match(struct fc_frame
*fp
)
671 return fc_fcp_is_read(fr_fsp(fp
)) &&
672 (fr_fsp(fp
)->data_len
> fcoe_ddp_min
);
676 * fcoe_em_config() - Allocate and configure an exchange manager
677 * @lport: The local port that the new EM will be associated with
679 * Returns: 0 on success
681 static inline int fcoe_em_config(struct fc_lport
*lport
)
683 struct fcoe_port
*port
= lport_priv(lport
);
684 struct fcoe_interface
*fcoe
= port
->fcoe
;
685 struct fcoe_interface
*oldfcoe
= NULL
;
686 struct net_device
*old_real_dev
, *cur_real_dev
;
687 u16 min_xid
= FCOE_MIN_XID
;
688 u16 max_xid
= FCOE_MAX_XID
;
691 * Check if need to allocate an em instance for
692 * offload exchange ids to be shared across all VN_PORTs/lport.
694 if (!lport
->lro_enabled
|| !lport
->lro_xid
||
695 (lport
->lro_xid
>= max_xid
)) {
701 * Reuse existing offload em instance in case
702 * it is already allocated on real eth device
704 if (fcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
705 cur_real_dev
= vlan_dev_real_dev(fcoe
->netdev
);
707 cur_real_dev
= fcoe
->netdev
;
709 list_for_each_entry(oldfcoe
, &fcoe_hostlist
, list
) {
710 if (oldfcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
711 old_real_dev
= vlan_dev_real_dev(oldfcoe
->netdev
);
713 old_real_dev
= oldfcoe
->netdev
;
715 if (cur_real_dev
== old_real_dev
) {
716 fcoe
->oem
= oldfcoe
->oem
;
722 if (!fc_exch_mgr_add(lport
, fcoe
->oem
, fcoe_oem_match
)) {
723 printk(KERN_ERR
"fcoe_em_config: failed to add "
724 "offload em:%p on interface:%s\n",
725 fcoe
->oem
, fcoe
->netdev
->name
);
729 fcoe
->oem
= fc_exch_mgr_alloc(lport
, FC_CLASS_3
,
730 FCOE_MIN_XID
, lport
->lro_xid
,
733 printk(KERN_ERR
"fcoe_em_config: failed to allocate "
734 "em for offload exches on interface:%s\n",
741 * Exclude offload EM xid range from next EM xid range.
743 min_xid
+= lport
->lro_xid
+ 1;
746 if (!fc_exch_mgr_alloc(lport
, FC_CLASS_3
, min_xid
, max_xid
, NULL
)) {
747 printk(KERN_ERR
"fcoe_em_config: failed to "
748 "allocate em on interface %s\n", fcoe
->netdev
->name
);
756 * fcoe_if_destroy() - Tear down a SW FCoE instance
757 * @lport: The local port to be destroyed
759 static void fcoe_if_destroy(struct fc_lport
*lport
)
761 struct fcoe_port
*port
= lport_priv(lport
);
762 struct fcoe_interface
*fcoe
= port
->fcoe
;
763 struct net_device
*netdev
= fcoe
->netdev
;
765 FCOE_NETDEV_DBG(netdev
, "Destroying interface\n");
767 /* Logout of the fabric */
768 fc_fabric_logoff(lport
);
770 /* Cleanup the fc_lport */
771 fc_lport_destroy(lport
);
772 fc_fcp_destroy(lport
);
774 /* Stop the transmit retry timer */
775 del_timer_sync(&port
->timer
);
777 /* Free existing transmit skbs */
778 fcoe_clean_pending_queue(lport
);
781 if (!is_zero_ether_addr(port
->data_src_addr
))
782 dev_unicast_delete(netdev
, port
->data_src_addr
);
785 /* receives may not be stopped until after this */
786 fcoe_interface_put(fcoe
);
788 /* Free queued packets for the per-CPU receive threads */
789 fcoe_percpu_clean(lport
);
791 /* Detach from the scsi-ml */
792 fc_remove_host(lport
->host
);
793 scsi_remove_host(lport
->host
);
795 /* There are no more rports or I/O, free the EM */
796 fc_exch_mgr_free(lport
);
798 /* Free memory used by statistical counters */
799 fc_lport_free_stats(lport
);
801 /* Release the Scsi_Host */
802 scsi_host_put(lport
->host
);
806 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
807 * @lport: The local port to setup DDP for
808 * @xid: The exchange ID for this DDP transfer
809 * @sgl: The scatterlist describing this transfer
810 * @sgc: The number of sg items
812 * Returns: 0 if the DDP context was not configured
814 static int fcoe_ddp_setup(struct fc_lport
*lport
, u16 xid
,
815 struct scatterlist
*sgl
, unsigned int sgc
)
817 struct net_device
*netdev
= fcoe_netdev(lport
);
819 if (netdev
->netdev_ops
->ndo_fcoe_ddp_setup
)
820 return netdev
->netdev_ops
->ndo_fcoe_ddp_setup(netdev
,
828 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
829 * @lport: The local port to complete DDP on
830 * @xid: The exchange ID for this DDP transfer
832 * Returns: the length of data that have been completed by DDP
834 static int fcoe_ddp_done(struct fc_lport
*lport
, u16 xid
)
836 struct net_device
*netdev
= fcoe_netdev(lport
);
838 if (netdev
->netdev_ops
->ndo_fcoe_ddp_done
)
839 return netdev
->netdev_ops
->ndo_fcoe_ddp_done(netdev
, xid
);
844 * fcoe_if_create() - Create a FCoE instance on an interface
845 * @fcoe: The FCoE interface to create a local port on
846 * @parent: The device pointer to be the parent in sysfs for the SCSI host
847 * @npiv: Indicates if the port is a vport or not
849 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
851 * Returns: The allocated fc_lport or an error pointer
853 static struct fc_lport
*fcoe_if_create(struct fcoe_interface
*fcoe
,
854 struct device
*parent
, int npiv
)
856 struct net_device
*netdev
= fcoe
->netdev
;
857 struct fc_lport
*lport
= NULL
;
858 struct fcoe_port
*port
;
859 struct Scsi_Host
*shost
;
862 * parent is only a vport if npiv is 1,
863 * but we'll only use vport in that case so go ahead and set it
865 struct fc_vport
*vport
= dev_to_vport(parent
);
867 FCOE_NETDEV_DBG(netdev
, "Create Interface\n");
870 lport
= libfc_host_alloc(&fcoe_shost_template
,
871 sizeof(struct fcoe_port
));
873 lport
= libfc_vport_create(vport
,
874 sizeof(struct fcoe_port
));
877 FCOE_NETDEV_DBG(netdev
, "Could not allocate host structure\n");
882 port
= lport_priv(lport
);
885 INIT_WORK(&port
->destroy_work
, fcoe_destroy_work
);
887 /* configure a fc_lport including the exchange manager */
888 rc
= fcoe_lport_config(lport
);
890 FCOE_NETDEV_DBG(netdev
, "Could not configure lport for the "
896 FCOE_NETDEV_DBG(netdev
, "Setting vport names, 0x%llX 0x%llX\n",
897 vport
->node_name
, vport
->port_name
);
898 fc_set_wwnn(lport
, vport
->node_name
);
899 fc_set_wwpn(lport
, vport
->port_name
);
902 /* configure lport network properties */
903 rc
= fcoe_netdev_config(lport
, netdev
);
905 FCOE_NETDEV_DBG(netdev
, "Could not configure netdev for the "
910 /* configure lport scsi host properties */
911 rc
= fcoe_shost_config(lport
, shost
, parent
);
913 FCOE_NETDEV_DBG(netdev
, "Could not configure shost for the "
918 /* Initialize the library */
919 rc
= fcoe_libfc_config(lport
, &fcoe_libfc_fcn_templ
);
921 FCOE_NETDEV_DBG(netdev
, "Could not configure libfc for the "
928 * fcoe_em_alloc() and fcoe_hostlist_add() both
929 * need to be atomic with respect to other changes to the
930 * hostlist since fcoe_em_alloc() looks for an existing EM
931 * instance on host list updated by fcoe_hostlist_add().
933 * This is currently handled through the fcoe_config_mutex
937 /* lport exch manager allocation */
938 rc
= fcoe_em_config(lport
);
940 FCOE_NETDEV_DBG(netdev
, "Could not configure the EM "
941 "for the interface\n");
946 fcoe_interface_get(fcoe
);
950 fc_exch_mgr_free(lport
);
952 scsi_host_put(lport
->host
);
958 * fcoe_if_init() - Initialization routine for fcoe.ko
960 * Attaches the SW FCoE transport to the FC transport
962 * Returns: 0 on success
964 static int __init
fcoe_if_init(void)
966 /* attach to scsi transport */
967 fcoe_transport_template
= fc_attach_transport(&fcoe_transport_function
);
968 fcoe_vport_transport_template
=
969 fc_attach_transport(&fcoe_vport_transport_function
);
971 if (!fcoe_transport_template
) {
972 printk(KERN_ERR
"fcoe: Failed to attach to the FC transport\n");
980 * fcoe_if_exit() - Tear down fcoe.ko
982 * Detaches the SW FCoE transport from the FC transport
984 * Returns: 0 on success
986 int __exit
fcoe_if_exit(void)
988 fc_release_transport(fcoe_transport_template
);
989 fc_release_transport(fcoe_vport_transport_template
);
990 fcoe_transport_template
= NULL
;
991 fcoe_vport_transport_template
= NULL
;
996 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
997 * @cpu: The CPU index of the CPU to create a receive thread for
999 static void fcoe_percpu_thread_create(unsigned int cpu
)
1001 struct fcoe_percpu_s
*p
;
1002 struct task_struct
*thread
;
1004 p
= &per_cpu(fcoe_percpu
, cpu
);
1006 thread
= kthread_create(fcoe_percpu_receive_thread
,
1007 (void *)p
, "fcoethread/%d", cpu
);
1009 if (likely(!IS_ERR(thread
))) {
1010 kthread_bind(thread
, cpu
);
1011 wake_up_process(thread
);
1013 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1015 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1020 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1021 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1023 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1024 * current CPU's Rx thread. If the thread being destroyed is bound to
1025 * the CPU processing this context the skbs will be freed.
1027 static void fcoe_percpu_thread_destroy(unsigned int cpu
)
1029 struct fcoe_percpu_s
*p
;
1030 struct task_struct
*thread
;
1031 struct page
*crc_eof
;
1032 struct sk_buff
*skb
;
1034 struct fcoe_percpu_s
*p0
;
1035 unsigned targ_cpu
= smp_processor_id();
1036 #endif /* CONFIG_SMP */
1038 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu
);
1040 /* Prevent any new skbs from being queued for this CPU. */
1041 p
= &per_cpu(fcoe_percpu
, cpu
);
1042 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1045 crc_eof
= p
->crc_eof_page
;
1046 p
->crc_eof_page
= NULL
;
1047 p
->crc_eof_offset
= 0;
1048 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1052 * Don't bother moving the skb's if this context is running
1053 * on the same CPU that is having its thread destroyed. This
1054 * can easily happen when the module is removed.
1056 if (cpu
!= targ_cpu
) {
1057 p0
= &per_cpu(fcoe_percpu
, targ_cpu
);
1058 spin_lock_bh(&p0
->fcoe_rx_list
.lock
);
1060 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1063 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1064 __skb_queue_tail(&p0
->fcoe_rx_list
, skb
);
1065 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1068 * The targeted CPU is not initialized and cannot accept
1069 * new skbs. Unlock the targeted CPU and drop the skbs
1070 * on the CPU that is going offline.
1072 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1074 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1078 * This scenario occurs when the module is being removed
1079 * and all threads are being destroyed. skbs will continue
1080 * to be shifted from the CPU thread that is being removed
1081 * to the CPU thread associated with the CPU that is processing
1082 * the module removal. Once there is only one CPU Rx thread it
1083 * will reach this case and we will drop all skbs and later
1086 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1087 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1089 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1093 * This a non-SMP scenario where the singular Rx thread is
1094 * being removed. Free all skbs and stop the thread.
1096 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1097 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1099 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1103 kthread_stop(thread
);
1110 * fcoe_cpu_callback() - Handler for CPU hotplug events
1111 * @nfb: The callback data block
1112 * @action: The event triggering the callback
1113 * @hcpu: The index of the CPU that the event is for
1115 * This creates or destroys per-CPU data for fcoe
1117 * Returns NOTIFY_OK always.
1119 static int fcoe_cpu_callback(struct notifier_block
*nfb
,
1120 unsigned long action
, void *hcpu
)
1122 unsigned cpu
= (unsigned long)hcpu
;
1126 case CPU_ONLINE_FROZEN
:
1127 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu
);
1128 fcoe_percpu_thread_create(cpu
);
1131 case CPU_DEAD_FROZEN
:
1132 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu
);
1133 fcoe_percpu_thread_destroy(cpu
);
1142 * fcoe_rcv() - Receive packets from a net device
1143 * @skb: The received packet
1144 * @netdev: The net device that the packet was received on
1145 * @ptype: The packet type context
1146 * @olddev: The last device net device
1148 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1149 * FC frame and passes the frame to libfc.
1151 * Returns: 0 for success
1153 int fcoe_rcv(struct sk_buff
*skb
, struct net_device
*netdev
,
1154 struct packet_type
*ptype
, struct net_device
*olddev
)
1156 struct fc_lport
*lport
;
1157 struct fcoe_rcv_info
*fr
;
1158 struct fcoe_interface
*fcoe
;
1159 struct fc_frame_header
*fh
;
1160 struct fcoe_percpu_s
*fps
;
1163 fcoe
= container_of(ptype
, struct fcoe_interface
, fcoe_packet_type
);
1164 lport
= fcoe
->ctlr
.lp
;
1165 if (unlikely(!lport
)) {
1166 FCOE_NETDEV_DBG(netdev
, "Cannot find hba structure");
1169 if (!lport
->link_up
)
1172 FCOE_NETDEV_DBG(netdev
, "skb_info: len:%d data_len:%d head:%p "
1173 "data:%p tail:%p end:%p sum:%d dev:%s",
1174 skb
->len
, skb
->data_len
, skb
->head
, skb
->data
,
1175 skb_tail_pointer(skb
), skb_end_pointer(skb
),
1176 skb
->csum
, skb
->dev
? skb
->dev
->name
: "<NULL>");
1178 /* check for FCOE packet type */
1179 if (unlikely(eth_hdr(skb
)->h_proto
!= htons(ETH_P_FCOE
))) {
1180 FCOE_NETDEV_DBG(netdev
, "Wrong FC type frame");
1185 * Check for minimum frame length, and make sure required FCoE
1186 * and FC headers are pulled into the linear data area.
1188 if (unlikely((skb
->len
< FCOE_MIN_FRAME
) ||
1189 !pskb_may_pull(skb
, FCOE_HEADER_LEN
)))
1192 skb_set_transport_header(skb
, sizeof(struct fcoe_hdr
));
1193 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1195 fr
= fcoe_dev_from_skb(skb
);
1200 * In case the incoming frame's exchange is originated from
1201 * the initiator, then received frame's exchange id is ANDed
1202 * with fc_cpu_mask bits to get the same cpu on which exchange
1203 * was originated, otherwise just use the current cpu.
1205 if (ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)
1206 cpu
= ntohs(fh
->fh_ox_id
) & fc_cpu_mask
;
1208 cpu
= smp_processor_id();
1210 fps
= &per_cpu(fcoe_percpu
, cpu
);
1211 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1212 if (unlikely(!fps
->thread
)) {
1214 * The targeted CPU is not ready, let's target
1215 * the first CPU now. For non-SMP systems this
1216 * will check the same CPU twice.
1218 FCOE_NETDEV_DBG(netdev
, "CPU is online, but no receive thread "
1219 "ready for incoming skb- using first online "
1222 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1223 cpu
= first_cpu(cpu_online_map
);
1224 fps
= &per_cpu(fcoe_percpu
, cpu
);
1225 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1227 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1233 * We now have a valid CPU that we're targeting for
1234 * this skb. We also have this receive thread locked,
1235 * so we're free to queue skbs into it's queue.
1237 __skb_queue_tail(&fps
->fcoe_rx_list
, skb
);
1238 if (fps
->fcoe_rx_list
.qlen
== 1)
1239 wake_up_process(fps
->thread
);
1241 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1245 fc_lport_get_stats(lport
)->ErrorFrames
++;
1253 * fcoe_start_io() - Start FCoE I/O
1254 * @skb: The packet to be transmitted
1256 * This routine is called from the net device to start transmitting
1259 * Returns: 0 for success
1261 static inline int fcoe_start_io(struct sk_buff
*skb
)
1266 rc
= dev_queue_xmit(skb
);
1274 * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1275 * @skb: The packet to be transmitted
1276 * @tlen: The total length of the trailer
1278 * This routine allocates a page for frame trailers. The page is re-used if
1279 * there is enough room left on it for the current trailer. If there isn't
1280 * enough buffer left a new page is allocated for the trailer. Reference to
1281 * the page from this function as well as the skbs using the page fragments
1282 * ensure that the page is freed at the appropriate time.
1284 * Returns: 0 for success
1286 static int fcoe_get_paged_crc_eof(struct sk_buff
*skb
, int tlen
)
1288 struct fcoe_percpu_s
*fps
;
1291 fps
= &get_cpu_var(fcoe_percpu
);
1292 page
= fps
->crc_eof_page
;
1294 page
= alloc_page(GFP_ATOMIC
);
1296 put_cpu_var(fcoe_percpu
);
1299 fps
->crc_eof_page
= page
;
1300 fps
->crc_eof_offset
= 0;
1304 skb_fill_page_desc(skb
, skb_shinfo(skb
)->nr_frags
, page
,
1305 fps
->crc_eof_offset
, tlen
);
1307 skb
->data_len
+= tlen
;
1308 skb
->truesize
+= tlen
;
1309 fps
->crc_eof_offset
+= sizeof(struct fcoe_crc_eof
);
1311 if (fps
->crc_eof_offset
>= PAGE_SIZE
) {
1312 fps
->crc_eof_page
= NULL
;
1313 fps
->crc_eof_offset
= 0;
1316 put_cpu_var(fcoe_percpu
);
1321 * fcoe_fc_crc() - Calculates the CRC for a given frame
1322 * @fp: The frame to be checksumed
1324 * This uses crc32() routine to calculate the CRC for a frame
1326 * Return: The 32 bit CRC value
1328 u32
fcoe_fc_crc(struct fc_frame
*fp
)
1330 struct sk_buff
*skb
= fp_skb(fp
);
1331 struct skb_frag_struct
*frag
;
1332 unsigned char *data
;
1333 unsigned long off
, len
, clen
;
1337 crc
= crc32(~0, skb
->data
, skb_headlen(skb
));
1339 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; i
++) {
1340 frag
= &skb_shinfo(skb
)->frags
[i
];
1341 off
= frag
->page_offset
;
1344 clen
= min(len
, PAGE_SIZE
- (off
& ~PAGE_MASK
));
1345 data
= kmap_atomic(frag
->page
+ (off
>> PAGE_SHIFT
),
1346 KM_SKB_DATA_SOFTIRQ
);
1347 crc
= crc32(crc
, data
+ (off
& ~PAGE_MASK
), clen
);
1348 kunmap_atomic(data
, KM_SKB_DATA_SOFTIRQ
);
1357 * fcoe_xmit() - Transmit a FCoE frame
1358 * @lport: The local port that the frame is to be transmitted for
1359 * @fp: The frame to be transmitted
1361 * Return: 0 for success
1363 int fcoe_xmit(struct fc_lport
*lport
, struct fc_frame
*fp
)
1368 struct fcoe_crc_eof
*cp
;
1369 struct sk_buff
*skb
;
1370 struct fcoe_dev_stats
*stats
;
1371 struct fc_frame_header
*fh
;
1372 unsigned int hlen
; /* header length implies the version */
1373 unsigned int tlen
; /* trailer length */
1374 unsigned int elen
; /* eth header, may include vlan */
1375 struct fcoe_port
*port
= lport_priv(lport
);
1376 struct fcoe_interface
*fcoe
= port
->fcoe
;
1378 struct fcoe_hdr
*hp
;
1380 WARN_ON((fr_len(fp
) % sizeof(u32
)) != 0);
1382 fh
= fc_frame_header_get(fp
);
1384 wlen
= skb
->len
/ FCOE_WORD_TO_BYTE
;
1386 if (!lport
->link_up
) {
1391 if (unlikely(fh
->fh_r_ctl
== FC_RCTL_ELS_REQ
) &&
1392 fcoe_ctlr_els_send(&fcoe
->ctlr
, lport
, skb
))
1398 elen
= sizeof(struct ethhdr
);
1399 hlen
= sizeof(struct fcoe_hdr
);
1400 tlen
= sizeof(struct fcoe_crc_eof
);
1401 wlen
= (skb
->len
- tlen
+ sizeof(crc
)) / FCOE_WORD_TO_BYTE
;
1404 if (likely(lport
->crc_offload
)) {
1405 skb
->ip_summed
= CHECKSUM_PARTIAL
;
1406 skb
->csum_start
= skb_headroom(skb
);
1407 skb
->csum_offset
= skb
->len
;
1410 skb
->ip_summed
= CHECKSUM_NONE
;
1411 crc
= fcoe_fc_crc(fp
);
1414 /* copy port crc and eof to the skb buff */
1415 if (skb_is_nonlinear(skb
)) {
1417 if (fcoe_get_paged_crc_eof(skb
, tlen
)) {
1421 frag
= &skb_shinfo(skb
)->frags
[skb_shinfo(skb
)->nr_frags
- 1];
1422 cp
= kmap_atomic(frag
->page
, KM_SKB_DATA_SOFTIRQ
)
1423 + frag
->page_offset
;
1425 cp
= (struct fcoe_crc_eof
*)skb_put(skb
, tlen
);
1428 memset(cp
, 0, sizeof(*cp
));
1430 cp
->fcoe_crc32
= cpu_to_le32(~crc
);
1432 if (skb_is_nonlinear(skb
)) {
1433 kunmap_atomic(cp
, KM_SKB_DATA_SOFTIRQ
);
1437 /* adjust skb network/transport offsets to match mac/fcoe/port */
1438 skb_push(skb
, elen
+ hlen
);
1439 skb_reset_mac_header(skb
);
1440 skb_reset_network_header(skb
);
1441 skb
->mac_len
= elen
;
1442 skb
->protocol
= htons(ETH_P_FCOE
);
1443 skb
->dev
= fcoe
->netdev
;
1445 /* fill up mac and fcoe headers */
1447 eh
->h_proto
= htons(ETH_P_FCOE
);
1448 if (fcoe
->ctlr
.map_dest
)
1449 fc_fcoe_set_mac(eh
->h_dest
, fh
->fh_d_id
);
1451 /* insert GW address */
1452 memcpy(eh
->h_dest
, fcoe
->ctlr
.dest_addr
, ETH_ALEN
);
1454 if (unlikely(fcoe
->ctlr
.flogi_oxid
!= FC_XID_UNKNOWN
))
1455 memcpy(eh
->h_source
, fcoe
->ctlr
.ctl_src_addr
, ETH_ALEN
);
1457 memcpy(eh
->h_source
, port
->data_src_addr
, ETH_ALEN
);
1459 hp
= (struct fcoe_hdr
*)(eh
+ 1);
1460 memset(hp
, 0, sizeof(*hp
));
1462 FC_FCOE_ENCAPS_VER(hp
, FC_FCOE_VER
);
1465 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1466 if (lport
->seq_offload
&& fr_max_payload(fp
)) {
1467 skb_shinfo(skb
)->gso_type
= SKB_GSO_FCOE
;
1468 skb_shinfo(skb
)->gso_size
= fr_max_payload(fp
);
1470 skb_shinfo(skb
)->gso_type
= 0;
1471 skb_shinfo(skb
)->gso_size
= 0;
1473 /* update tx stats: regardless if LLD fails */
1474 stats
= fc_lport_get_stats(lport
);
1476 stats
->TxWords
+= wlen
;
1478 /* send down to lld */
1480 if (port
->fcoe_pending_queue
.qlen
)
1481 fcoe_check_wait_queue(lport
, skb
);
1482 else if (fcoe_start_io(skb
))
1483 fcoe_check_wait_queue(lport
, skb
);
1489 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1490 * @skb: The completed skb (argument required by destructor)
1492 static void fcoe_percpu_flush_done(struct sk_buff
*skb
)
1494 complete(&fcoe_flush_completion
);
1498 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1499 * @arg: The per-CPU context
1501 * Return: 0 for success
1503 int fcoe_percpu_receive_thread(void *arg
)
1505 struct fcoe_percpu_s
*p
= arg
;
1507 struct fc_lport
*lport
;
1508 struct fcoe_rcv_info
*fr
;
1509 struct fcoe_dev_stats
*stats
;
1510 struct fc_frame_header
*fh
;
1511 struct sk_buff
*skb
;
1512 struct fcoe_crc_eof crc_eof
;
1513 struct fc_frame
*fp
;
1515 struct fcoe_port
*port
;
1516 struct fcoe_hdr
*hp
;
1518 set_user_nice(current
, -20);
1520 while (!kthread_should_stop()) {
1522 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1523 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) == NULL
) {
1524 set_current_state(TASK_INTERRUPTIBLE
);
1525 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1527 set_current_state(TASK_RUNNING
);
1528 if (kthread_should_stop())
1530 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1532 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1533 fr
= fcoe_dev_from_skb(skb
);
1535 if (unlikely(!lport
)) {
1536 if (skb
->destructor
!= fcoe_percpu_flush_done
)
1537 FCOE_NETDEV_DBG(skb
->dev
, "NULL lport in skb");
1542 FCOE_NETDEV_DBG(skb
->dev
, "skb_info: len:%d data_len:%d "
1543 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1544 skb
->len
, skb
->data_len
,
1545 skb
->head
, skb
->data
, skb_tail_pointer(skb
),
1546 skb_end_pointer(skb
), skb
->csum
,
1547 skb
->dev
? skb
->dev
->name
: "<NULL>");
1550 * Save source MAC address before discarding header.
1552 port
= lport_priv(lport
);
1553 if (skb_is_nonlinear(skb
))
1554 skb_linearize(skb
); /* not ideal */
1555 mac
= eth_hdr(skb
)->h_source
;
1558 * Frame length checks and setting up the header pointers
1559 * was done in fcoe_rcv already.
1561 hp
= (struct fcoe_hdr
*) skb_network_header(skb
);
1562 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1564 stats
= fc_lport_get_stats(lport
);
1565 if (unlikely(FC_FCOE_DECAPS_VER(hp
) != FC_FCOE_VER
)) {
1566 if (stats
->ErrorFrames
< 5)
1567 printk(KERN_WARNING
"fcoe: FCoE version "
1568 "mismatch: The frame has "
1569 "version %x, but the "
1570 "initiator supports version "
1571 "%x\n", FC_FCOE_DECAPS_VER(hp
),
1573 stats
->ErrorFrames
++;
1578 skb_pull(skb
, sizeof(struct fcoe_hdr
));
1579 fr_len
= skb
->len
- sizeof(struct fcoe_crc_eof
);
1582 stats
->RxWords
+= fr_len
/ FCOE_WORD_TO_BYTE
;
1584 fp
= (struct fc_frame
*)skb
;
1587 fr_sof(fp
) = hp
->fcoe_sof
;
1589 /* Copy out the CRC and EOF trailer for access */
1590 if (skb_copy_bits(skb
, fr_len
, &crc_eof
, sizeof(crc_eof
))) {
1594 fr_eof(fp
) = crc_eof
.fcoe_eof
;
1595 fr_crc(fp
) = crc_eof
.fcoe_crc32
;
1596 if (pskb_trim(skb
, fr_len
)) {
1602 * We only check CRC if no offload is available and if it is
1603 * it's solicited data, in which case, the FCP layer would
1604 * check it during the copy.
1606 if (lport
->crc_offload
&&
1607 skb
->ip_summed
== CHECKSUM_UNNECESSARY
)
1608 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1610 fr_flags(fp
) |= FCPHF_CRC_UNCHECKED
;
1612 fh
= fc_frame_header_get(fp
);
1613 if (fh
->fh_r_ctl
== FC_RCTL_DD_SOL_DATA
&&
1614 fh
->fh_type
== FC_TYPE_FCP
) {
1615 fc_exch_recv(lport
, fp
);
1618 if (fr_flags(fp
) & FCPHF_CRC_UNCHECKED
) {
1619 if (le32_to_cpu(fr_crc(fp
)) !=
1620 ~crc32(~0, skb
->data
, fr_len
)) {
1621 if (stats
->InvalidCRCCount
< 5)
1622 printk(KERN_WARNING
"fcoe: dropping "
1623 "frame with CRC error\n");
1624 stats
->InvalidCRCCount
++;
1625 stats
->ErrorFrames
++;
1629 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1631 fc_exch_recv(lport
, fp
);
1637 * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
1638 * @lport: The local port whose backlog is to be cleared
1640 * This empties the wait_queue, dequeues the head of the wait_queue queue
1641 * and calls fcoe_start_io() for each packet. If all skb have been
1642 * transmitted it returns the qlen. If an error occurs it restores
1643 * wait_queue (to try again later) and returns -1.
1645 * The wait_queue is used when the skb transmit fails. The failed skb
1646 * will go in the wait_queue which will be emptied by the timer function or
1647 * by the next skb transmit.
1649 static void fcoe_check_wait_queue(struct fc_lport
*lport
, struct sk_buff
*skb
)
1651 struct fcoe_port
*port
= lport_priv(lport
);
1654 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
1657 __skb_queue_tail(&port
->fcoe_pending_queue
, skb
);
1659 if (port
->fcoe_pending_queue_active
)
1661 port
->fcoe_pending_queue_active
= 1;
1663 while (port
->fcoe_pending_queue
.qlen
) {
1664 /* keep qlen > 0 until fcoe_start_io succeeds */
1665 port
->fcoe_pending_queue
.qlen
++;
1666 skb
= __skb_dequeue(&port
->fcoe_pending_queue
);
1668 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
1669 rc
= fcoe_start_io(skb
);
1670 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
1673 __skb_queue_head(&port
->fcoe_pending_queue
, skb
);
1674 /* undo temporary increment above */
1675 port
->fcoe_pending_queue
.qlen
--;
1678 /* undo temporary increment above */
1679 port
->fcoe_pending_queue
.qlen
--;
1682 if (port
->fcoe_pending_queue
.qlen
< FCOE_LOW_QUEUE_DEPTH
)
1684 if (port
->fcoe_pending_queue
.qlen
&& !timer_pending(&port
->timer
))
1685 mod_timer(&port
->timer
, jiffies
+ 2);
1686 port
->fcoe_pending_queue_active
= 0;
1688 if (port
->fcoe_pending_queue
.qlen
> FCOE_MAX_QUEUE_DEPTH
)
1690 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
1695 * fcoe_dev_setup() - Setup the link change notification interface
1697 static void fcoe_dev_setup(void)
1699 register_netdevice_notifier(&fcoe_notifier
);
1703 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1705 static void fcoe_dev_cleanup(void)
1707 unregister_netdevice_notifier(&fcoe_notifier
);
1711 * fcoe_device_notification() - Handler for net device events
1712 * @notifier: The context of the notification
1713 * @event: The type of event
1714 * @ptr: The net device that the event was on
1716 * This function is called by the Ethernet driver in case of link change event.
1718 * Returns: 0 for success
1720 static int fcoe_device_notification(struct notifier_block
*notifier
,
1721 ulong event
, void *ptr
)
1723 struct fc_lport
*lport
= NULL
;
1724 struct net_device
*netdev
= ptr
;
1725 struct fcoe_interface
*fcoe
;
1726 struct fcoe_port
*port
;
1727 struct fcoe_dev_stats
*stats
;
1728 u32 link_possible
= 1;
1732 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
1733 if (fcoe
->netdev
== netdev
) {
1734 lport
= fcoe
->ctlr
.lp
;
1745 case NETDEV_GOING_DOWN
:
1751 case NETDEV_CHANGEMTU
:
1752 if (netdev
->features
& NETIF_F_FCOE_MTU
)
1754 mfs
= netdev
->mtu
- (sizeof(struct fcoe_hdr
) +
1755 sizeof(struct fcoe_crc_eof
));
1756 if (mfs
>= FC_MIN_MAX_FRAME
)
1757 fc_set_mfs(lport
, mfs
);
1759 case NETDEV_REGISTER
:
1761 case NETDEV_UNREGISTER
:
1762 list_del(&fcoe
->list
);
1763 port
= lport_priv(fcoe
->ctlr
.lp
);
1764 fcoe_interface_cleanup(fcoe
);
1765 schedule_work(&port
->destroy_work
);
1769 FCOE_NETDEV_DBG(netdev
, "Unknown event %ld "
1770 "from netdev netlink\n", event
);
1772 if (link_possible
&& !fcoe_link_ok(lport
))
1773 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1774 else if (fcoe_ctlr_link_down(&fcoe
->ctlr
)) {
1775 stats
= fc_lport_get_stats(lport
);
1776 stats
->LinkFailureCount
++;
1777 fcoe_clean_pending_queue(lport
);
1784 * fcoe_if_to_netdev() - Parse a name buffer to get a net device
1785 * @buffer: The name of the net device
1787 * Returns: NULL or a ptr to net_device
1789 static struct net_device
*fcoe_if_to_netdev(const char *buffer
)
1792 char ifname
[IFNAMSIZ
+ 2];
1795 strlcpy(ifname
, buffer
, IFNAMSIZ
);
1796 cp
= ifname
+ strlen(ifname
);
1797 while (--cp
>= ifname
&& *cp
== '\n')
1799 return dev_get_by_name(&init_net
, ifname
);
1805 * fcoe_destroy() - Destroy a FCoE interface
1806 * @buffer: The name of the Ethernet interface to be destroyed
1807 * @kp: The associated kernel parameter
1809 * Called from sysfs.
1811 * Returns: 0 for success
1813 static int fcoe_destroy(const char *buffer
, struct kernel_param
*kp
)
1815 struct fcoe_interface
*fcoe
;
1816 struct net_device
*netdev
;
1819 mutex_lock(&fcoe_config_mutex
);
1820 #ifdef CONFIG_FCOE_MODULE
1822 * Make sure the module has been initialized, and is not about to be
1823 * removed. Module paramter sysfs files are writable before the
1824 * module_init function is called and after module_exit.
1826 if (THIS_MODULE
->state
!= MODULE_STATE_LIVE
) {
1832 netdev
= fcoe_if_to_netdev(buffer
);
1839 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1845 list_del(&fcoe
->list
);
1846 fcoe_interface_cleanup(fcoe
);
1848 fcoe_if_destroy(fcoe
->ctlr
.lp
);
1852 mutex_unlock(&fcoe_config_mutex
);
1857 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1858 * @work: Handle to the FCoE port to be destroyed
1860 static void fcoe_destroy_work(struct work_struct
*work
)
1862 struct fcoe_port
*port
;
1864 port
= container_of(work
, struct fcoe_port
, destroy_work
);
1865 mutex_lock(&fcoe_config_mutex
);
1866 fcoe_if_destroy(port
->lport
);
1867 mutex_unlock(&fcoe_config_mutex
);
1871 * fcoe_create() - Create a fcoe interface
1872 * @buffer: The name of the Ethernet interface to create on
1873 * @kp: The associated kernel param
1875 * Called from sysfs.
1877 * Returns: 0 for success
1879 static int fcoe_create(const char *buffer
, struct kernel_param
*kp
)
1882 struct fcoe_interface
*fcoe
;
1883 struct fc_lport
*lport
;
1884 struct net_device
*netdev
;
1886 mutex_lock(&fcoe_config_mutex
);
1887 #ifdef CONFIG_FCOE_MODULE
1889 * Make sure the module has been initialized, and is not about to be
1890 * removed. Module paramter sysfs files are writable before the
1891 * module_init function is called and after module_exit.
1893 if (THIS_MODULE
->state
!= MODULE_STATE_LIVE
) {
1900 netdev
= fcoe_if_to_netdev(buffer
);
1906 /* look for existing lport */
1907 if (fcoe_hostlist_lookup(netdev
)) {
1912 fcoe
= fcoe_interface_create(netdev
);
1918 lport
= fcoe_if_create(fcoe
, &netdev
->dev
, 0);
1919 if (IS_ERR(lport
)) {
1920 printk(KERN_ERR
"fcoe: Failed to create interface (%s)\n",
1923 fcoe_interface_cleanup(fcoe
);
1927 /* Make this the "master" N_Port */
1928 fcoe
->ctlr
.lp
= lport
;
1930 /* add to lports list */
1931 fcoe_hostlist_add(lport
);
1933 /* start FIP Discovery and FLOGI */
1934 lport
->boot_time
= jiffies
;
1935 fc_fabric_login(lport
);
1936 if (!fcoe_link_ok(lport
))
1937 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1942 * Release from init in fcoe_interface_create(), on success lport
1943 * should be holding a reference taken in fcoe_if_create().
1945 fcoe_interface_put(fcoe
);
1950 mutex_unlock(&fcoe_config_mutex
);
1955 * fcoe_link_ok() - Check if the link is OK for a local port
1956 * @lport: The local port to check link on
1958 * Any permanently-disqualifying conditions have been previously checked.
1959 * This also updates the speed setting, which may change with link for 100/1000.
1961 * This function should probably be checking for PAUSE support at some point
1962 * in the future. Currently Per-priority-pause is not determinable using
1963 * ethtool, so we shouldn't be restrictive until that problem is resolved.
1965 * Returns: 0 if link is OK for use by FCoE.
1968 int fcoe_link_ok(struct fc_lport
*lport
)
1970 struct fcoe_port
*port
= lport_priv(lport
);
1971 struct net_device
*netdev
= port
->fcoe
->netdev
;
1972 struct ethtool_cmd ecmd
= { ETHTOOL_GSET
};
1974 if ((netdev
->flags
& IFF_UP
) && netif_carrier_ok(netdev
) &&
1975 (!dev_ethtool_get_settings(netdev
, &ecmd
))) {
1976 lport
->link_supported_speeds
&=
1977 ~(FC_PORTSPEED_1GBIT
| FC_PORTSPEED_10GBIT
);
1978 if (ecmd
.supported
& (SUPPORTED_1000baseT_Half
|
1979 SUPPORTED_1000baseT_Full
))
1980 lport
->link_supported_speeds
|= FC_PORTSPEED_1GBIT
;
1981 if (ecmd
.supported
& SUPPORTED_10000baseT_Full
)
1982 lport
->link_supported_speeds
|=
1983 FC_PORTSPEED_10GBIT
;
1984 if (ecmd
.speed
== SPEED_1000
)
1985 lport
->link_speed
= FC_PORTSPEED_1GBIT
;
1986 if (ecmd
.speed
== SPEED_10000
)
1987 lport
->link_speed
= FC_PORTSPEED_10GBIT
;
1995 * fcoe_percpu_clean() - Clear all pending skbs for an local port
1996 * @lport: The local port whose skbs are to be cleared
1998 * Must be called with fcoe_create_mutex held to single-thread completion.
2000 * This flushes the pending skbs by adding a new skb to each queue and
2001 * waiting until they are all freed. This assures us that not only are
2002 * there no packets that will be handled by the lport, but also that any
2003 * threads already handling packet have returned.
2005 void fcoe_percpu_clean(struct fc_lport
*lport
)
2007 struct fcoe_percpu_s
*pp
;
2008 struct fcoe_rcv_info
*fr
;
2009 struct sk_buff_head
*list
;
2010 struct sk_buff
*skb
, *next
;
2011 struct sk_buff
*head
;
2014 for_each_possible_cpu(cpu
) {
2015 pp
= &per_cpu(fcoe_percpu
, cpu
);
2016 spin_lock_bh(&pp
->fcoe_rx_list
.lock
);
2017 list
= &pp
->fcoe_rx_list
;
2019 for (skb
= head
; skb
!= (struct sk_buff
*)list
;
2022 fr
= fcoe_dev_from_skb(skb
);
2023 if (fr
->fr_dev
== lport
) {
2024 __skb_unlink(skb
, list
);
2029 if (!pp
->thread
|| !cpu_online(cpu
)) {
2030 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2034 skb
= dev_alloc_skb(0);
2036 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2039 skb
->destructor
= fcoe_percpu_flush_done
;
2041 __skb_queue_tail(&pp
->fcoe_rx_list
, skb
);
2042 if (pp
->fcoe_rx_list
.qlen
== 1)
2043 wake_up_process(pp
->thread
);
2044 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2046 wait_for_completion(&fcoe_flush_completion
);
2051 * fcoe_clean_pending_queue() - Dequeue a skb and free it
2052 * @lport: The local port to dequeue a skb on
2054 void fcoe_clean_pending_queue(struct fc_lport
*lport
)
2056 struct fcoe_port
*port
= lport_priv(lport
);
2057 struct sk_buff
*skb
;
2059 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
2060 while ((skb
= __skb_dequeue(&port
->fcoe_pending_queue
)) != NULL
) {
2061 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
2063 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
2065 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
2069 * fcoe_reset() - Reset a local port
2070 * @shost: The SCSI host associated with the local port to be reset
2072 * Returns: Always 0 (return value required by FC transport template)
2074 int fcoe_reset(struct Scsi_Host
*shost
)
2076 struct fc_lport
*lport
= shost_priv(shost
);
2077 fc_lport_reset(lport
);
2082 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2083 * @netdev: The net device used as a key
2085 * Locking: Must be called with the RNL mutex held.
2087 * Returns: NULL or the FCoE interface
2089 static struct fcoe_interface
*
2090 fcoe_hostlist_lookup_port(const struct net_device
*netdev
)
2092 struct fcoe_interface
*fcoe
;
2094 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
2095 if (fcoe
->netdev
== netdev
)
2102 * fcoe_hostlist_lookup() - Find the local port associated with a
2104 * @netdev: The netdevice used as a key
2106 * Locking: Must be called with the RTNL mutex held
2108 * Returns: NULL or the local port
2110 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*netdev
)
2112 struct fcoe_interface
*fcoe
;
2114 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2115 return (fcoe
) ? fcoe
->ctlr
.lp
: NULL
;
2119 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2120 * port to the hostlist
2121 * @lport: The local port that identifies the FCoE interface to be added
2123 * Locking: must be called with the RTNL mutex held
2125 * Returns: 0 for success
2127 static int fcoe_hostlist_add(const struct fc_lport
*lport
)
2129 struct fcoe_interface
*fcoe
;
2130 struct fcoe_port
*port
;
2132 fcoe
= fcoe_hostlist_lookup_port(fcoe_netdev(lport
));
2134 port
= lport_priv(lport
);
2136 list_add_tail(&fcoe
->list
, &fcoe_hostlist
);
2142 * fcoe_init() - Initialize fcoe.ko
2144 * Returns: 0 on success, or a negative value on failure
2146 static int __init
fcoe_init(void)
2148 struct fcoe_percpu_s
*p
;
2152 mutex_lock(&fcoe_config_mutex
);
2154 for_each_possible_cpu(cpu
) {
2155 p
= &per_cpu(fcoe_percpu
, cpu
);
2156 skb_queue_head_init(&p
->fcoe_rx_list
);
2159 for_each_online_cpu(cpu
)
2160 fcoe_percpu_thread_create(cpu
);
2162 /* Initialize per CPU interrupt thread */
2163 rc
= register_hotcpu_notifier(&fcoe_cpu_notifier
);
2167 /* Setup link change notification */
2170 rc
= fcoe_if_init();
2174 mutex_unlock(&fcoe_config_mutex
);
2178 for_each_online_cpu(cpu
) {
2179 fcoe_percpu_thread_destroy(cpu
);
2181 mutex_unlock(&fcoe_config_mutex
);
2184 module_init(fcoe_init
);
2187 * fcoe_exit() - Clean up fcoe.ko
2189 * Returns: 0 on success or a negative value on failure
2191 static void __exit
fcoe_exit(void)
2193 struct fcoe_interface
*fcoe
, *tmp
;
2194 struct fcoe_port
*port
;
2197 mutex_lock(&fcoe_config_mutex
);
2201 /* releases the associated fcoe hosts */
2203 list_for_each_entry_safe(fcoe
, tmp
, &fcoe_hostlist
, list
) {
2204 list_del(&fcoe
->list
);
2205 port
= lport_priv(fcoe
->ctlr
.lp
);
2206 fcoe_interface_cleanup(fcoe
);
2207 schedule_work(&port
->destroy_work
);
2211 unregister_hotcpu_notifier(&fcoe_cpu_notifier
);
2213 for_each_online_cpu(cpu
)
2214 fcoe_percpu_thread_destroy(cpu
);
2216 mutex_unlock(&fcoe_config_mutex
);
2218 /* flush any asyncronous interface destroys,
2219 * this should happen after the netdev notifier is unregistered */
2220 flush_scheduled_work();
2221 /* That will flush out all the N_Ports on the hostlist, but now we
2222 * may have NPIV VN_Ports scheduled for destruction */
2223 flush_scheduled_work();
2225 /* detach from scsi transport
2226 * must happen after all destroys are done, therefor after the flush */
2229 module_exit(fcoe_exit
);
2232 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2233 * @seq: active sequence in the FLOGI or FDISC exchange
2234 * @fp: response frame, or error encoded in a pointer (timeout)
2235 * @arg: pointer the the fcoe_ctlr structure
2237 * This handles MAC address managment for FCoE, then passes control on to
2238 * the libfc FLOGI response handler.
2240 static void fcoe_flogi_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2242 struct fcoe_ctlr
*fip
= arg
;
2243 struct fc_exch
*exch
= fc_seq_exch(seq
);
2244 struct fc_lport
*lport
= exch
->lp
;
2250 mac
= fr_cb(fp
)->granted_mac
;
2251 if (is_zero_ether_addr(mac
)) {
2253 if (fcoe_ctlr_recv_flogi(fip
, lport
, fp
)) {
2258 fcoe_update_src_mac(lport
, mac
);
2260 fc_lport_flogi_resp(seq
, fp
, lport
);
2264 * fcoe_logo_resp() - FCoE specific LOGO response handler
2265 * @seq: active sequence in the LOGO exchange
2266 * @fp: response frame, or error encoded in a pointer (timeout)
2267 * @arg: pointer the the fcoe_ctlr structure
2269 * This handles MAC address managment for FCoE, then passes control on to
2270 * the libfc LOGO response handler.
2272 static void fcoe_logo_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2274 struct fc_lport
*lport
= arg
;
2275 static u8 zero_mac
[ETH_ALEN
] = { 0 };
2278 fcoe_update_src_mac(lport
, zero_mac
);
2279 fc_lport_logo_resp(seq
, fp
, lport
);
2283 * fcoe_elsct_send - FCoE specific ELS handler
2285 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2286 * using FCoE specific response handlers and passing the FIP controller as
2287 * the argument (the lport is still available from the exchange).
2289 * Most of the work here is just handed off to the libfc routine.
2291 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*lport
, u32 did
,
2292 struct fc_frame
*fp
, unsigned int op
,
2293 void (*resp
)(struct fc_seq
*,
2296 void *arg
, u32 timeout
)
2298 struct fcoe_port
*port
= lport_priv(lport
);
2299 struct fcoe_interface
*fcoe
= port
->fcoe
;
2300 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
2301 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
2306 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_flogi_resp
,
2309 /* only hook onto fabric logouts, not port logouts */
2310 if (ntoh24(fh
->fh_d_id
) != FC_FID_FLOGI
)
2312 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_logo_resp
,
2315 return fc_elsct_send(lport
, did
, fp
, op
, resp
, arg
, timeout
);
2319 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2320 * @vport: fc_vport object to create a new fc_host for
2321 * @disabled: start the new fc_host in a disabled state by default?
2323 * Returns: 0 for success
2325 static int fcoe_vport_create(struct fc_vport
*vport
, bool disabled
)
2327 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2328 struct fc_lport
*n_port
= shost_priv(shost
);
2329 struct fcoe_port
*port
= lport_priv(n_port
);
2330 struct fcoe_interface
*fcoe
= port
->fcoe
;
2331 struct net_device
*netdev
= fcoe
->netdev
;
2332 struct fc_lport
*vn_port
;
2334 mutex_lock(&fcoe_config_mutex
);
2335 vn_port
= fcoe_if_create(fcoe
, &vport
->dev
, 1);
2336 mutex_unlock(&fcoe_config_mutex
);
2338 if (IS_ERR(vn_port
)) {
2339 printk(KERN_ERR
"fcoe: fcoe_vport_create(%s) failed\n",
2345 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2347 vn_port
->boot_time
= jiffies
;
2348 fc_fabric_login(vn_port
);
2349 fc_vport_setlink(vn_port
);
2355 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2356 * @vport: fc_vport object that is being destroyed
2358 * Returns: 0 for success
2360 static int fcoe_vport_destroy(struct fc_vport
*vport
)
2362 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2363 struct fc_lport
*n_port
= shost_priv(shost
);
2364 struct fc_lport
*vn_port
= vport
->dd_data
;
2365 struct fcoe_port
*port
= lport_priv(vn_port
);
2367 mutex_lock(&n_port
->lp_mutex
);
2368 list_del(&vn_port
->list
);
2369 mutex_unlock(&n_port
->lp_mutex
);
2370 schedule_work(&port
->destroy_work
);
2375 * fcoe_vport_disable() - change vport state
2376 * @vport: vport to bring online/offline
2377 * @disable: should the vport be disabled?
2379 static int fcoe_vport_disable(struct fc_vport
*vport
, bool disable
)
2381 struct fc_lport
*lport
= vport
->dd_data
;
2384 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2385 fc_fabric_logoff(lport
);
2387 lport
->boot_time
= jiffies
;
2388 fc_fabric_login(lport
);
2389 fc_vport_setlink(lport
);
2396 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2397 * @vport: fc_vport with a new symbolic name string
2399 * After generating a new symbolic name string, a new RSPN_ID request is
2400 * sent to the name server. There is no response handler, so if it fails
2401 * for some reason it will not be retried.
2403 static void fcoe_set_vport_symbolic_name(struct fc_vport
*vport
)
2405 struct fc_lport
*lport
= vport
->dd_data
;
2406 struct fc_frame
*fp
;
2409 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
2410 "%s v%s over %s : %s", FCOE_NAME
, FCOE_VERSION
,
2411 fcoe_netdev(lport
)->name
, vport
->symbolic_name
);
2413 if (lport
->state
!= LPORT_ST_READY
)
2416 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
2417 fp
= fc_frame_alloc(lport
,
2418 sizeof(struct fc_ct_hdr
) +
2419 sizeof(struct fc_ns_rspn
) + len
);
2422 lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, FC_NS_RSPN_ID
,
2423 NULL
, NULL
, lport
->e_d_tov
);