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 <scsi/scsi_tcq.h>
35 #include <scsi/scsicam.h>
36 #include <scsi/scsi_transport.h>
37 #include <scsi/scsi_transport_fc.h>
38 #include <net/rtnetlink.h>
40 #include <scsi/fc/fc_encaps.h>
41 #include <scsi/fc/fc_fip.h>
43 #include <scsi/libfc.h>
44 #include <scsi/fc_frame.h>
45 #include <scsi/libfcoe.h>
49 MODULE_AUTHOR("Open-FCoE.org");
50 MODULE_DESCRIPTION("FCoE");
51 MODULE_LICENSE("GPL v2");
53 /* Performance tuning parameters for fcoe */
54 static unsigned int fcoe_ddp_min
;
55 module_param_named(ddp_min
, fcoe_ddp_min
, uint
, S_IRUGO
| S_IWUSR
);
56 MODULE_PARM_DESC(ddp_min
, "Minimum I/O size in bytes for " \
57 "Direct Data Placement (DDP).");
59 DEFINE_MUTEX(fcoe_config_mutex
);
61 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
62 static DECLARE_COMPLETION(fcoe_flush_completion
);
65 /* must only by accessed under the RTNL mutex */
66 LIST_HEAD(fcoe_hostlist
);
67 DEFINE_PER_CPU(struct fcoe_percpu_s
, fcoe_percpu
);
69 /* Function Prototypes */
70 static int fcoe_reset(struct Scsi_Host
*);
71 static int fcoe_xmit(struct fc_lport
*, struct fc_frame
*);
72 static int fcoe_rcv(struct sk_buff
*, struct net_device
*,
73 struct packet_type
*, struct net_device
*);
74 static int fcoe_percpu_receive_thread(void *);
75 static void fcoe_clean_pending_queue(struct fc_lport
*);
76 static void fcoe_percpu_clean(struct fc_lport
*);
77 static int fcoe_link_speed_update(struct fc_lport
*);
78 static int fcoe_link_ok(struct fc_lport
*);
80 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*);
81 static int fcoe_hostlist_add(const struct fc_lport
*);
83 static void fcoe_check_wait_queue(struct fc_lport
*, struct sk_buff
*);
84 static int fcoe_device_notification(struct notifier_block
*, ulong
, void *);
85 static void fcoe_dev_setup(void);
86 static void fcoe_dev_cleanup(void);
87 static struct fcoe_interface
88 *fcoe_hostlist_lookup_port(const struct net_device
*);
90 static int fcoe_fip_recv(struct sk_buff
*, struct net_device
*,
91 struct packet_type
*, struct net_device
*);
93 static void fcoe_fip_send(struct fcoe_ctlr
*, struct sk_buff
*);
94 static void fcoe_update_src_mac(struct fc_lport
*, u8
*);
95 static u8
*fcoe_get_src_mac(struct fc_lport
*);
96 static void fcoe_destroy_work(struct work_struct
*);
98 static int fcoe_ddp_setup(struct fc_lport
*, u16
, struct scatterlist
*,
100 static int fcoe_ddp_done(struct fc_lport
*, u16
);
102 static int fcoe_cpu_callback(struct notifier_block
*, unsigned long, void *);
104 static int fcoe_create(const char *, struct kernel_param
*);
105 static int fcoe_destroy(const char *, struct kernel_param
*);
106 static int fcoe_enable(const char *, struct kernel_param
*);
107 static int fcoe_disable(const char *, struct kernel_param
*);
109 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*,
110 u32 did
, struct fc_frame
*,
112 void (*resp
)(struct fc_seq
*,
115 void *, u32 timeout
);
116 static void fcoe_recv_frame(struct sk_buff
*skb
);
118 static void fcoe_get_lesb(struct fc_lport
*, struct fc_els_lesb
*);
120 module_param_call(create
, fcoe_create
, NULL
, NULL
, S_IWUSR
);
121 __MODULE_PARM_TYPE(create
, "string");
122 MODULE_PARM_DESC(create
, " Creates fcoe instance on a ethernet interface");
123 module_param_call(destroy
, fcoe_destroy
, NULL
, NULL
, S_IWUSR
);
124 __MODULE_PARM_TYPE(destroy
, "string");
125 MODULE_PARM_DESC(destroy
, " Destroys fcoe instance on a ethernet interface");
126 module_param_call(enable
, fcoe_enable
, NULL
, NULL
, S_IWUSR
);
127 __MODULE_PARM_TYPE(enable
, "string");
128 MODULE_PARM_DESC(enable
, " Enables fcoe on a ethernet interface.");
129 module_param_call(disable
, fcoe_disable
, NULL
, NULL
, S_IWUSR
);
130 __MODULE_PARM_TYPE(disable
, "string");
131 MODULE_PARM_DESC(disable
, " Disables fcoe on a ethernet interface.");
133 /* notification function for packets from net device */
134 static struct notifier_block fcoe_notifier
= {
135 .notifier_call
= fcoe_device_notification
,
138 /* notification function for CPU hotplug events */
139 static struct notifier_block fcoe_cpu_notifier
= {
140 .notifier_call
= fcoe_cpu_callback
,
143 static struct scsi_transport_template
*fcoe_transport_template
;
144 static struct scsi_transport_template
*fcoe_vport_transport_template
;
146 static int fcoe_vport_destroy(struct fc_vport
*);
147 static int fcoe_vport_create(struct fc_vport
*, bool disabled
);
148 static int fcoe_vport_disable(struct fc_vport
*, bool disable
);
149 static void fcoe_set_vport_symbolic_name(struct fc_vport
*);
150 static void fcoe_set_port_id(struct fc_lport
*, u32
, struct fc_frame
*);
152 static struct libfc_function_template fcoe_libfc_fcn_templ
= {
153 .frame_send
= fcoe_xmit
,
154 .ddp_setup
= fcoe_ddp_setup
,
155 .ddp_done
= fcoe_ddp_done
,
156 .elsct_send
= fcoe_elsct_send
,
157 .get_lesb
= fcoe_get_lesb
,
158 .lport_set_port_id
= fcoe_set_port_id
,
161 struct fc_function_template fcoe_transport_function
= {
162 .show_host_node_name
= 1,
163 .show_host_port_name
= 1,
164 .show_host_supported_classes
= 1,
165 .show_host_supported_fc4s
= 1,
166 .show_host_active_fc4s
= 1,
167 .show_host_maxframe_size
= 1,
169 .show_host_port_id
= 1,
170 .show_host_supported_speeds
= 1,
171 .get_host_speed
= fc_get_host_speed
,
172 .show_host_speed
= 1,
173 .show_host_port_type
= 1,
174 .get_host_port_state
= fc_get_host_port_state
,
175 .show_host_port_state
= 1,
176 .show_host_symbolic_name
= 1,
178 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
179 .show_rport_maxframe_size
= 1,
180 .show_rport_supported_classes
= 1,
182 .show_host_fabric_name
= 1,
183 .show_starget_node_name
= 1,
184 .show_starget_port_name
= 1,
185 .show_starget_port_id
= 1,
186 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
187 .show_rport_dev_loss_tmo
= 1,
188 .get_fc_host_stats
= fc_get_host_stats
,
189 .issue_fc_host_lip
= fcoe_reset
,
191 .terminate_rport_io
= fc_rport_terminate_io
,
193 .vport_create
= fcoe_vport_create
,
194 .vport_delete
= fcoe_vport_destroy
,
195 .vport_disable
= fcoe_vport_disable
,
196 .set_vport_symbolic_name
= fcoe_set_vport_symbolic_name
,
198 .bsg_request
= fc_lport_bsg_request
,
201 struct fc_function_template fcoe_vport_transport_function
= {
202 .show_host_node_name
= 1,
203 .show_host_port_name
= 1,
204 .show_host_supported_classes
= 1,
205 .show_host_supported_fc4s
= 1,
206 .show_host_active_fc4s
= 1,
207 .show_host_maxframe_size
= 1,
209 .show_host_port_id
= 1,
210 .show_host_supported_speeds
= 1,
211 .get_host_speed
= fc_get_host_speed
,
212 .show_host_speed
= 1,
213 .show_host_port_type
= 1,
214 .get_host_port_state
= fc_get_host_port_state
,
215 .show_host_port_state
= 1,
216 .show_host_symbolic_name
= 1,
218 .dd_fcrport_size
= sizeof(struct fc_rport_libfc_priv
),
219 .show_rport_maxframe_size
= 1,
220 .show_rport_supported_classes
= 1,
222 .show_host_fabric_name
= 1,
223 .show_starget_node_name
= 1,
224 .show_starget_port_name
= 1,
225 .show_starget_port_id
= 1,
226 .set_rport_dev_loss_tmo
= fc_set_rport_loss_tmo
,
227 .show_rport_dev_loss_tmo
= 1,
228 .get_fc_host_stats
= fc_get_host_stats
,
229 .issue_fc_host_lip
= fcoe_reset
,
231 .terminate_rport_io
= fc_rport_terminate_io
,
233 .bsg_request
= fc_lport_bsg_request
,
236 static struct scsi_host_template fcoe_shost_template
= {
237 .module
= THIS_MODULE
,
238 .name
= "FCoE Driver",
239 .proc_name
= FCOE_NAME
,
240 .queuecommand
= fc_queuecommand
,
241 .eh_abort_handler
= fc_eh_abort
,
242 .eh_device_reset_handler
= fc_eh_device_reset
,
243 .eh_host_reset_handler
= fc_eh_host_reset
,
244 .slave_alloc
= fc_slave_alloc
,
245 .change_queue_depth
= fc_change_queue_depth
,
246 .change_queue_type
= fc_change_queue_type
,
249 .can_queue
= FCOE_MAX_OUTSTANDING_COMMANDS
,
250 .use_clustering
= ENABLE_CLUSTERING
,
251 .sg_tablesize
= SG_ALL
,
252 .max_sectors
= 0xffff,
256 * fcoe_interface_setup() - Setup a FCoE interface
257 * @fcoe: The new FCoE interface
258 * @netdev: The net device that the fcoe interface is on
260 * Returns : 0 for success
261 * Locking: must be called with the RTNL mutex held
263 static int fcoe_interface_setup(struct fcoe_interface
*fcoe
,
264 struct net_device
*netdev
)
266 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
267 struct netdev_hw_addr
*ha
;
268 struct net_device
*real_dev
;
269 u8 flogi_maddr
[ETH_ALEN
];
270 const struct net_device_ops
*ops
;
272 fcoe
->netdev
= netdev
;
274 /* Let LLD initialize for FCoE */
275 ops
= netdev
->netdev_ops
;
276 if (ops
->ndo_fcoe_enable
) {
277 if (ops
->ndo_fcoe_enable(netdev
))
278 FCOE_NETDEV_DBG(netdev
, "Failed to enable FCoE"
279 " specific feature for LLD.\n");
282 /* Do not support for bonding device */
283 if ((netdev
->priv_flags
& IFF_MASTER_ALB
) ||
284 (netdev
->priv_flags
& IFF_SLAVE_INACTIVE
) ||
285 (netdev
->priv_flags
& IFF_MASTER_8023AD
)) {
286 FCOE_NETDEV_DBG(netdev
, "Bonded interfaces not supported\n");
290 /* look for SAN MAC address, if multiple SAN MACs exist, only
291 * use the first one for SPMA */
292 real_dev
= (netdev
->priv_flags
& IFF_802_1Q_VLAN
) ?
293 vlan_dev_real_dev(netdev
) : netdev
;
295 for_each_dev_addr(real_dev
, ha
) {
296 if ((ha
->type
== NETDEV_HW_ADDR_T_SAN
) &&
297 (is_valid_ether_addr(ha
->addr
))) {
298 memcpy(fip
->ctl_src_addr
, ha
->addr
, ETH_ALEN
);
305 /* setup Source Mac Address */
307 memcpy(fip
->ctl_src_addr
, netdev
->dev_addr
, netdev
->addr_len
);
310 * Add FCoE MAC address as second unicast MAC address
311 * or enter promiscuous mode if not capable of listening
312 * for multiple unicast MACs.
314 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
315 dev_uc_add(netdev
, flogi_maddr
);
317 dev_uc_add(netdev
, fip
->ctl_src_addr
);
318 if (fip
->mode
== FIP_MODE_VN2VN
) {
319 dev_mc_add(netdev
, FIP_ALL_VN2VN_MACS
);
320 dev_mc_add(netdev
, FIP_ALL_P2P_MACS
);
322 dev_mc_add(netdev
, FIP_ALL_ENODE_MACS
);
325 * setup the receive function from ethernet driver
326 * on the ethertype for the given device
328 fcoe
->fcoe_packet_type
.func
= fcoe_rcv
;
329 fcoe
->fcoe_packet_type
.type
= __constant_htons(ETH_P_FCOE
);
330 fcoe
->fcoe_packet_type
.dev
= netdev
;
331 dev_add_pack(&fcoe
->fcoe_packet_type
);
333 fcoe
->fip_packet_type
.func
= fcoe_fip_recv
;
334 fcoe
->fip_packet_type
.type
= htons(ETH_P_FIP
);
335 fcoe
->fip_packet_type
.dev
= netdev
;
336 dev_add_pack(&fcoe
->fip_packet_type
);
342 * fcoe_interface_create() - Create a FCoE interface on a net device
343 * @netdev: The net device to create the FCoE interface on
345 * Returns: pointer to a struct fcoe_interface or NULL on error
347 static struct fcoe_interface
*fcoe_interface_create(struct net_device
*netdev
)
349 struct fcoe_interface
*fcoe
;
352 fcoe
= kzalloc(sizeof(*fcoe
), GFP_KERNEL
);
354 FCOE_NETDEV_DBG(netdev
, "Could not allocate fcoe structure\n");
359 kref_init(&fcoe
->kref
);
364 fcoe_ctlr_init(&fcoe
->ctlr
, FIP_MODE_AUTO
);
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 * fcoe_interface_cleanup() - Clean up a FCoE interface
382 * @fcoe: The FCoE interface to be cleaned up
384 * Caller must be holding the RTNL mutex
386 void fcoe_interface_cleanup(struct fcoe_interface
*fcoe
)
388 struct net_device
*netdev
= fcoe
->netdev
;
389 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
390 u8 flogi_maddr
[ETH_ALEN
];
391 const struct net_device_ops
*ops
;
394 * Don't listen for Ethernet packets anymore.
395 * synchronize_net() ensures that the packet handlers are not running
396 * on another CPU. dev_remove_pack() would do that, this calls the
397 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
399 __dev_remove_pack(&fcoe
->fcoe_packet_type
);
400 __dev_remove_pack(&fcoe
->fip_packet_type
);
403 /* Delete secondary MAC addresses */
404 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
405 dev_uc_del(netdev
, flogi_maddr
);
407 dev_uc_del(netdev
, fip
->ctl_src_addr
);
408 if (fip
->mode
== FIP_MODE_VN2VN
) {
409 dev_mc_del(netdev
, FIP_ALL_VN2VN_MACS
);
410 dev_mc_del(netdev
, FIP_ALL_P2P_MACS
);
412 dev_mc_del(netdev
, FIP_ALL_ENODE_MACS
);
414 /* Tell the LLD we are done w/ FCoE */
415 ops
= netdev
->netdev_ops
;
416 if (ops
->ndo_fcoe_disable
) {
417 if (ops
->ndo_fcoe_disable(netdev
))
418 FCOE_NETDEV_DBG(netdev
, "Failed to disable FCoE"
419 " specific feature for LLD.\n");
424 * fcoe_interface_release() - fcoe_port kref release function
425 * @kref: Embedded reference count in an fcoe_interface struct
427 static void fcoe_interface_release(struct kref
*kref
)
429 struct fcoe_interface
*fcoe
;
430 struct net_device
*netdev
;
432 fcoe
= container_of(kref
, struct fcoe_interface
, kref
);
433 netdev
= fcoe
->netdev
;
434 /* tear-down the FCoE controller */
435 fcoe_ctlr_destroy(&fcoe
->ctlr
);
441 * fcoe_interface_get() - Get a reference to a FCoE interface
442 * @fcoe: The FCoE interface to be held
444 static inline void fcoe_interface_get(struct fcoe_interface
*fcoe
)
446 kref_get(&fcoe
->kref
);
450 * fcoe_interface_put() - Put a reference to a FCoE interface
451 * @fcoe: The FCoE interface to be released
453 static inline void fcoe_interface_put(struct fcoe_interface
*fcoe
)
455 kref_put(&fcoe
->kref
, fcoe_interface_release
);
459 * fcoe_fip_recv() - Handler for received FIP frames
460 * @skb: The receive skb
461 * @netdev: The associated net device
462 * @ptype: The packet_type structure which was used to register this handler
463 * @orig_dev: The original net_device the the skb was received on.
464 * (in case dev is a bond)
466 * Returns: 0 for success
468 static int fcoe_fip_recv(struct sk_buff
*skb
, struct net_device
*netdev
,
469 struct packet_type
*ptype
,
470 struct net_device
*orig_dev
)
472 struct fcoe_interface
*fcoe
;
474 fcoe
= container_of(ptype
, struct fcoe_interface
, fip_packet_type
);
475 fcoe_ctlr_recv(&fcoe
->ctlr
, skb
);
480 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
481 * @fip: The FCoE controller
482 * @skb: The FIP packet to be sent
484 static void fcoe_fip_send(struct fcoe_ctlr
*fip
, struct sk_buff
*skb
)
486 skb
->dev
= fcoe_from_ctlr(fip
)->netdev
;
491 * fcoe_update_src_mac() - Update the Ethernet MAC filters
492 * @lport: The local port to update the source MAC on
493 * @addr: Unicast MAC address to add
495 * Remove any previously-set unicast MAC filter.
496 * Add secondary FCoE MAC address filter for our OUI.
498 static void fcoe_update_src_mac(struct fc_lport
*lport
, u8
*addr
)
500 struct fcoe_port
*port
= lport_priv(lport
);
501 struct fcoe_interface
*fcoe
= port
->fcoe
;
504 if (!is_zero_ether_addr(port
->data_src_addr
))
505 dev_uc_del(fcoe
->netdev
, port
->data_src_addr
);
506 if (!is_zero_ether_addr(addr
))
507 dev_uc_add(fcoe
->netdev
, addr
);
508 memcpy(port
->data_src_addr
, addr
, ETH_ALEN
);
513 * fcoe_get_src_mac() - return the Ethernet source address for an lport
514 * @lport: libfc lport
516 static u8
*fcoe_get_src_mac(struct fc_lport
*lport
)
518 struct fcoe_port
*port
= lport_priv(lport
);
520 return port
->data_src_addr
;
524 * fcoe_lport_config() - Set up a local port
525 * @lport: The local port to be setup
527 * Returns: 0 for success
529 static int fcoe_lport_config(struct fc_lport
*lport
)
533 lport
->max_retry_count
= 3;
534 lport
->max_rport_retry_count
= 3;
535 lport
->e_d_tov
= 2 * 1000; /* FC-FS default */
536 lport
->r_a_tov
= 2 * 2 * 1000;
537 lport
->service_params
= (FCP_SPPF_INIT_FCN
| FCP_SPPF_RD_XRDY_DIS
|
538 FCP_SPPF_RETRY
| FCP_SPPF_CONF_COMPL
);
539 lport
->does_npiv
= 1;
541 fc_lport_init_stats(lport
);
543 /* lport fc_lport related configuration */
544 fc_lport_config(lport
);
546 /* offload related configuration */
547 lport
->crc_offload
= 0;
548 lport
->seq_offload
= 0;
549 lport
->lro_enabled
= 0;
557 * fcoe_queue_timer() - The fcoe queue timer
558 * @lport: The local port
560 * Calls fcoe_check_wait_queue on timeout
562 static void fcoe_queue_timer(ulong lport
)
564 fcoe_check_wait_queue((struct fc_lport
*)lport
, NULL
);
568 * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
569 * @netdev: the associated net device
570 * @wwn: the output WWN
571 * @type: the type of WWN (WWPN or WWNN)
573 * Returns: 0 for success
575 static int fcoe_get_wwn(struct net_device
*netdev
, u64
*wwn
, int type
)
577 const struct net_device_ops
*ops
= netdev
->netdev_ops
;
579 if (ops
->ndo_fcoe_get_wwn
)
580 return ops
->ndo_fcoe_get_wwn(netdev
, wwn
, type
);
585 * fcoe_netdev_config() - Set up net devive for SW FCoE
586 * @lport: The local port that is associated with the net device
587 * @netdev: The associated net device
589 * Must be called after fcoe_lport_config() as it will use local port mutex
591 * Returns: 0 for success
593 static int fcoe_netdev_config(struct fc_lport
*lport
, struct net_device
*netdev
)
597 struct fcoe_interface
*fcoe
;
598 struct fcoe_port
*port
;
601 /* Setup lport private data to point to fcoe softc */
602 port
= lport_priv(lport
);
606 * Determine max frame size based on underlying device and optional
607 * user-configured limit. If the MFS is too low, fcoe_link_ok()
608 * will return 0, so do this first.
611 if (netdev
->features
& NETIF_F_FCOE_MTU
) {
613 FCOE_NETDEV_DBG(netdev
, "Supports FCOE_MTU of %d bytes\n", mfs
);
615 mfs
-= (sizeof(struct fcoe_hdr
) + sizeof(struct fcoe_crc_eof
));
616 if (fc_set_mfs(lport
, mfs
))
619 /* offload features support */
620 if (netdev
->features
& NETIF_F_SG
)
623 if (netdev
->features
& NETIF_F_FCOE_CRC
) {
624 lport
->crc_offload
= 1;
625 FCOE_NETDEV_DBG(netdev
, "Supports FCCRC offload\n");
627 if (netdev
->features
& NETIF_F_FSO
) {
628 lport
->seq_offload
= 1;
629 lport
->lso_max
= netdev
->gso_max_size
;
630 FCOE_NETDEV_DBG(netdev
, "Supports LSO for max len 0x%x\n",
633 if (netdev
->fcoe_ddp_xid
) {
634 lport
->lro_enabled
= 1;
635 lport
->lro_xid
= netdev
->fcoe_ddp_xid
;
636 FCOE_NETDEV_DBG(netdev
, "Supports LRO for max xid 0x%x\n",
639 skb_queue_head_init(&port
->fcoe_pending_queue
);
640 port
->fcoe_pending_queue_active
= 0;
641 setup_timer(&port
->timer
, fcoe_queue_timer
, (unsigned long)lport
);
643 fcoe_link_speed_update(lport
);
647 * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN:
648 * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0.
649 * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID
651 if (netdev
->priv_flags
& IFF_802_1Q_VLAN
)
652 vid
= vlan_dev_vlan_id(netdev
);
654 if (fcoe_get_wwn(netdev
, &wwnn
, NETDEV_FCOE_WWNN
))
655 wwnn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
, 1, 0);
656 fc_set_wwnn(lport
, wwnn
);
657 if (fcoe_get_wwn(netdev
, &wwpn
, NETDEV_FCOE_WWPN
))
658 wwpn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
,
660 fc_set_wwpn(lport
, wwpn
);
667 * fcoe_shost_config() - Set up the SCSI host associated with a local port
668 * @lport: The local port
669 * @dev: The device associated with the SCSI host
671 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
673 * Returns: 0 for success
675 static int fcoe_shost_config(struct fc_lport
*lport
, struct device
*dev
)
679 /* lport scsi host config */
680 lport
->host
->max_lun
= FCOE_MAX_LUN
;
681 lport
->host
->max_id
= FCOE_MAX_FCP_TARGET
;
682 lport
->host
->max_channel
= 0;
683 lport
->host
->max_cmd_len
= FCOE_MAX_CMD_LEN
;
686 lport
->host
->transportt
= fcoe_vport_transport_template
;
688 lport
->host
->transportt
= fcoe_transport_template
;
690 /* add the new host to the SCSI-ml */
691 rc
= scsi_add_host(lport
->host
, dev
);
693 FCOE_NETDEV_DBG(fcoe_netdev(lport
), "fcoe_shost_config: "
694 "error on scsi_add_host\n");
699 fc_host_max_npiv_vports(lport
->host
) = USHRT_MAX
;
701 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
702 "%s v%s over %s", FCOE_NAME
, FCOE_VERSION
,
703 fcoe_netdev(lport
)->name
);
709 * fcoe_oem_match() - The match routine for the offloaded exchange manager
712 * This routine will be associated with an exchange manager (EM). When
713 * the libfc exchange handling code is looking for an EM to use it will
714 * call this routine and pass it the frame that it wishes to send. This
715 * routine will return True if the associated EM is to be used and False
716 * if the echange code should continue looking for an EM.
718 * The offload EM that this routine is associated with will handle any
719 * packets that are for SCSI read requests.
721 * Returns: True for read types I/O, otherwise returns false.
723 bool fcoe_oem_match(struct fc_frame
*fp
)
725 return fc_fcp_is_read(fr_fsp(fp
)) &&
726 (fr_fsp(fp
)->data_len
> fcoe_ddp_min
);
730 * fcoe_em_config() - Allocate and configure an exchange manager
731 * @lport: The local port that the new EM will be associated with
733 * Returns: 0 on success
735 static inline int fcoe_em_config(struct fc_lport
*lport
)
737 struct fcoe_port
*port
= lport_priv(lport
);
738 struct fcoe_interface
*fcoe
= port
->fcoe
;
739 struct fcoe_interface
*oldfcoe
= NULL
;
740 struct net_device
*old_real_dev
, *cur_real_dev
;
741 u16 min_xid
= FCOE_MIN_XID
;
742 u16 max_xid
= FCOE_MAX_XID
;
745 * Check if need to allocate an em instance for
746 * offload exchange ids to be shared across all VN_PORTs/lport.
748 if (!lport
->lro_enabled
|| !lport
->lro_xid
||
749 (lport
->lro_xid
>= max_xid
)) {
755 * Reuse existing offload em instance in case
756 * it is already allocated on real eth device
758 if (fcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
759 cur_real_dev
= vlan_dev_real_dev(fcoe
->netdev
);
761 cur_real_dev
= fcoe
->netdev
;
763 list_for_each_entry(oldfcoe
, &fcoe_hostlist
, list
) {
764 if (oldfcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
765 old_real_dev
= vlan_dev_real_dev(oldfcoe
->netdev
);
767 old_real_dev
= oldfcoe
->netdev
;
769 if (cur_real_dev
== old_real_dev
) {
770 fcoe
->oem
= oldfcoe
->oem
;
776 if (!fc_exch_mgr_add(lport
, fcoe
->oem
, fcoe_oem_match
)) {
777 printk(KERN_ERR
"fcoe_em_config: failed to add "
778 "offload em:%p on interface:%s\n",
779 fcoe
->oem
, fcoe
->netdev
->name
);
783 fcoe
->oem
= fc_exch_mgr_alloc(lport
, FC_CLASS_3
,
784 FCOE_MIN_XID
, lport
->lro_xid
,
787 printk(KERN_ERR
"fcoe_em_config: failed to allocate "
788 "em for offload exches on interface:%s\n",
795 * Exclude offload EM xid range from next EM xid range.
797 min_xid
+= lport
->lro_xid
+ 1;
800 if (!fc_exch_mgr_alloc(lport
, FC_CLASS_3
, min_xid
, max_xid
, NULL
)) {
801 printk(KERN_ERR
"fcoe_em_config: failed to "
802 "allocate em on interface %s\n", fcoe
->netdev
->name
);
810 * fcoe_if_destroy() - Tear down a SW FCoE instance
811 * @lport: The local port to be destroyed
813 * Locking: must be called with the RTNL mutex held and RTNL mutex
814 * needed to be dropped by this function since not dropping RTNL
815 * would cause circular locking warning on synchronous fip worker
816 * cancelling thru fcoe_interface_put invoked by this function.
819 static void fcoe_if_destroy(struct fc_lport
*lport
)
821 struct fcoe_port
*port
= lport_priv(lport
);
822 struct fcoe_interface
*fcoe
= port
->fcoe
;
823 struct net_device
*netdev
= fcoe
->netdev
;
825 FCOE_NETDEV_DBG(netdev
, "Destroying interface\n");
827 /* Logout of the fabric */
828 fc_fabric_logoff(lport
);
830 /* Cleanup the fc_lport */
831 fc_lport_destroy(lport
);
832 fc_fcp_destroy(lport
);
834 /* Stop the transmit retry timer */
835 del_timer_sync(&port
->timer
);
837 /* Free existing transmit skbs */
838 fcoe_clean_pending_queue(lport
);
840 if (!is_zero_ether_addr(port
->data_src_addr
))
841 dev_uc_del(netdev
, port
->data_src_addr
);
844 /* receives may not be stopped until after this */
845 fcoe_interface_put(fcoe
);
847 /* Free queued packets for the per-CPU receive threads */
848 fcoe_percpu_clean(lport
);
850 /* Detach from the scsi-ml */
851 fc_remove_host(lport
->host
);
852 scsi_remove_host(lport
->host
);
854 /* There are no more rports or I/O, free the EM */
855 fc_exch_mgr_free(lport
);
857 /* Free memory used by statistical counters */
858 fc_lport_free_stats(lport
);
860 /* Release the Scsi_Host */
861 scsi_host_put(lport
->host
);
862 module_put(THIS_MODULE
);
866 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
867 * @lport: The local port to setup DDP for
868 * @xid: The exchange ID for this DDP transfer
869 * @sgl: The scatterlist describing this transfer
870 * @sgc: The number of sg items
872 * Returns: 0 if the DDP context was not configured
874 static int fcoe_ddp_setup(struct fc_lport
*lport
, u16 xid
,
875 struct scatterlist
*sgl
, unsigned int sgc
)
877 struct net_device
*netdev
= fcoe_netdev(lport
);
879 if (netdev
->netdev_ops
->ndo_fcoe_ddp_setup
)
880 return netdev
->netdev_ops
->ndo_fcoe_ddp_setup(netdev
,
888 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
889 * @lport: The local port to complete DDP on
890 * @xid: The exchange ID for this DDP transfer
892 * Returns: the length of data that have been completed by DDP
894 static int fcoe_ddp_done(struct fc_lport
*lport
, u16 xid
)
896 struct net_device
*netdev
= fcoe_netdev(lport
);
898 if (netdev
->netdev_ops
->ndo_fcoe_ddp_done
)
899 return netdev
->netdev_ops
->ndo_fcoe_ddp_done(netdev
, xid
);
904 * fcoe_if_create() - Create a FCoE instance on an interface
905 * @fcoe: The FCoE interface to create a local port on
906 * @parent: The device pointer to be the parent in sysfs for the SCSI host
907 * @npiv: Indicates if the port is a vport or not
909 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
911 * Returns: The allocated fc_lport or an error pointer
913 static struct fc_lport
*fcoe_if_create(struct fcoe_interface
*fcoe
,
914 struct device
*parent
, int npiv
)
916 struct net_device
*netdev
= fcoe
->netdev
;
917 struct fc_lport
*lport
= NULL
;
918 struct fcoe_port
*port
;
921 * parent is only a vport if npiv is 1,
922 * but we'll only use vport in that case so go ahead and set it
924 struct fc_vport
*vport
= dev_to_vport(parent
);
926 FCOE_NETDEV_DBG(netdev
, "Create Interface\n");
929 lport
= libfc_host_alloc(&fcoe_shost_template
,
930 sizeof(struct fcoe_port
));
932 lport
= libfc_vport_create(vport
,
933 sizeof(struct fcoe_port
));
936 FCOE_NETDEV_DBG(netdev
, "Could not allocate host structure\n");
940 port
= lport_priv(lport
);
943 INIT_WORK(&port
->destroy_work
, fcoe_destroy_work
);
945 /* configure a fc_lport including the exchange manager */
946 rc
= fcoe_lport_config(lport
);
948 FCOE_NETDEV_DBG(netdev
, "Could not configure lport for the "
954 FCOE_NETDEV_DBG(netdev
, "Setting vport names, "
955 "%16.16llx %16.16llx\n",
956 vport
->node_name
, vport
->port_name
);
957 fc_set_wwnn(lport
, vport
->node_name
);
958 fc_set_wwpn(lport
, vport
->port_name
);
961 /* configure lport network properties */
962 rc
= fcoe_netdev_config(lport
, netdev
);
964 FCOE_NETDEV_DBG(netdev
, "Could not configure netdev for the "
969 /* configure lport scsi host properties */
970 rc
= fcoe_shost_config(lport
, parent
);
972 FCOE_NETDEV_DBG(netdev
, "Could not configure shost for the "
977 /* Initialize the library */
978 rc
= fcoe_libfc_config(lport
, &fcoe
->ctlr
, &fcoe_libfc_fcn_templ
, 1);
980 FCOE_NETDEV_DBG(netdev
, "Could not configure libfc for the "
987 * fcoe_em_alloc() and fcoe_hostlist_add() both
988 * need to be atomic with respect to other changes to the
989 * hostlist since fcoe_em_alloc() looks for an existing EM
990 * instance on host list updated by fcoe_hostlist_add().
992 * This is currently handled through the fcoe_config_mutex
996 /* lport exch manager allocation */
997 rc
= fcoe_em_config(lport
);
999 FCOE_NETDEV_DBG(netdev
, "Could not configure the EM "
1000 "for the interface\n");
1001 goto out_lp_destroy
;
1005 fcoe_interface_get(fcoe
);
1009 fc_exch_mgr_free(lport
);
1011 scsi_host_put(lport
->host
);
1017 * fcoe_if_init() - Initialization routine for fcoe.ko
1019 * Attaches the SW FCoE transport to the FC transport
1021 * Returns: 0 on success
1023 static int __init
fcoe_if_init(void)
1025 /* attach to scsi transport */
1026 fcoe_transport_template
= fc_attach_transport(&fcoe_transport_function
);
1027 fcoe_vport_transport_template
=
1028 fc_attach_transport(&fcoe_vport_transport_function
);
1030 if (!fcoe_transport_template
) {
1031 printk(KERN_ERR
"fcoe: Failed to attach to the FC transport\n");
1039 * fcoe_if_exit() - Tear down fcoe.ko
1041 * Detaches the SW FCoE transport from the FC transport
1043 * Returns: 0 on success
1045 int __exit
fcoe_if_exit(void)
1047 fc_release_transport(fcoe_transport_template
);
1048 fc_release_transport(fcoe_vport_transport_template
);
1049 fcoe_transport_template
= NULL
;
1050 fcoe_vport_transport_template
= NULL
;
1055 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1056 * @cpu: The CPU index of the CPU to create a receive thread for
1058 static void fcoe_percpu_thread_create(unsigned int cpu
)
1060 struct fcoe_percpu_s
*p
;
1061 struct task_struct
*thread
;
1063 p
= &per_cpu(fcoe_percpu
, cpu
);
1065 thread
= kthread_create(fcoe_percpu_receive_thread
,
1066 (void *)p
, "fcoethread/%d", cpu
);
1068 if (likely(!IS_ERR(thread
))) {
1069 kthread_bind(thread
, cpu
);
1070 wake_up_process(thread
);
1072 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1074 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1079 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1080 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1082 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1083 * current CPU's Rx thread. If the thread being destroyed is bound to
1084 * the CPU processing this context the skbs will be freed.
1086 static void fcoe_percpu_thread_destroy(unsigned int cpu
)
1088 struct fcoe_percpu_s
*p
;
1089 struct task_struct
*thread
;
1090 struct page
*crc_eof
;
1091 struct sk_buff
*skb
;
1093 struct fcoe_percpu_s
*p0
;
1094 unsigned targ_cpu
= get_cpu();
1095 #endif /* CONFIG_SMP */
1097 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu
);
1099 /* Prevent any new skbs from being queued for this CPU. */
1100 p
= &per_cpu(fcoe_percpu
, cpu
);
1101 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1104 crc_eof
= p
->crc_eof_page
;
1105 p
->crc_eof_page
= NULL
;
1106 p
->crc_eof_offset
= 0;
1107 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1111 * Don't bother moving the skb's if this context is running
1112 * on the same CPU that is having its thread destroyed. This
1113 * can easily happen when the module is removed.
1115 if (cpu
!= targ_cpu
) {
1116 p0
= &per_cpu(fcoe_percpu
, targ_cpu
);
1117 spin_lock_bh(&p0
->fcoe_rx_list
.lock
);
1119 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1122 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1123 __skb_queue_tail(&p0
->fcoe_rx_list
, skb
);
1124 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1127 * The targeted CPU is not initialized and cannot accept
1128 * new skbs. Unlock the targeted CPU and drop the skbs
1129 * on the CPU that is going offline.
1131 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1133 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1137 * This scenario occurs when the module is being removed
1138 * and all threads are being destroyed. skbs will continue
1139 * to be shifted from the CPU thread that is being removed
1140 * to the CPU thread associated with the CPU that is processing
1141 * the module removal. Once there is only one CPU Rx thread it
1142 * will reach this case and we will drop all skbs and later
1145 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1146 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1148 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1153 * This a non-SMP scenario where the singular Rx thread is
1154 * being removed. Free all skbs and stop the thread.
1156 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1157 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1159 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1163 kthread_stop(thread
);
1170 * fcoe_cpu_callback() - Handler for CPU hotplug events
1171 * @nfb: The callback data block
1172 * @action: The event triggering the callback
1173 * @hcpu: The index of the CPU that the event is for
1175 * This creates or destroys per-CPU data for fcoe
1177 * Returns NOTIFY_OK always.
1179 static int fcoe_cpu_callback(struct notifier_block
*nfb
,
1180 unsigned long action
, void *hcpu
)
1182 unsigned cpu
= (unsigned long)hcpu
;
1186 case CPU_ONLINE_FROZEN
:
1187 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu
);
1188 fcoe_percpu_thread_create(cpu
);
1191 case CPU_DEAD_FROZEN
:
1192 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu
);
1193 fcoe_percpu_thread_destroy(cpu
);
1202 * fcoe_rcv() - Receive packets from a net device
1203 * @skb: The received packet
1204 * @netdev: The net device that the packet was received on
1205 * @ptype: The packet type context
1206 * @olddev: The last device net device
1208 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1209 * FC frame and passes the frame to libfc.
1211 * Returns: 0 for success
1213 int fcoe_rcv(struct sk_buff
*skb
, struct net_device
*netdev
,
1214 struct packet_type
*ptype
, struct net_device
*olddev
)
1216 struct fc_lport
*lport
;
1217 struct fcoe_rcv_info
*fr
;
1218 struct fcoe_interface
*fcoe
;
1219 struct fc_frame_header
*fh
;
1220 struct fcoe_percpu_s
*fps
;
1221 struct fcoe_port
*port
;
1225 fcoe
= container_of(ptype
, struct fcoe_interface
, fcoe_packet_type
);
1226 lport
= fcoe
->ctlr
.lp
;
1227 if (unlikely(!lport
)) {
1228 FCOE_NETDEV_DBG(netdev
, "Cannot find hba structure");
1231 if (!lport
->link_up
)
1234 FCOE_NETDEV_DBG(netdev
, "skb_info: len:%d data_len:%d head:%p "
1235 "data:%p tail:%p end:%p sum:%d dev:%s",
1236 skb
->len
, skb
->data_len
, skb
->head
, skb
->data
,
1237 skb_tail_pointer(skb
), skb_end_pointer(skb
),
1238 skb
->csum
, skb
->dev
? skb
->dev
->name
: "<NULL>");
1240 /* check for mac addresses */
1242 port
= lport_priv(lport
);
1243 if (compare_ether_addr(eh
->h_dest
, port
->data_src_addr
) &&
1244 compare_ether_addr(eh
->h_dest
, fcoe
->ctlr
.ctl_src_addr
) &&
1245 compare_ether_addr(eh
->h_dest
, (u8
[6])FC_FCOE_FLOGI_MAC
)) {
1246 FCOE_NETDEV_DBG(netdev
, "wrong destination mac address:%pM\n",
1251 if (is_fip_mode(&fcoe
->ctlr
) &&
1252 compare_ether_addr(eh
->h_source
, fcoe
->ctlr
.dest_addr
)) {
1253 FCOE_NETDEV_DBG(netdev
, "wrong source mac address:%pM\n",
1259 * Check for minimum frame length, and make sure required FCoE
1260 * and FC headers are pulled into the linear data area.
1262 if (unlikely((skb
->len
< FCOE_MIN_FRAME
) ||
1263 !pskb_may_pull(skb
, FCOE_HEADER_LEN
)))
1266 skb_set_transport_header(skb
, sizeof(struct fcoe_hdr
));
1267 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1269 fr
= fcoe_dev_from_skb(skb
);
1274 * In case the incoming frame's exchange is originated from
1275 * the initiator, then received frame's exchange id is ANDed
1276 * with fc_cpu_mask bits to get the same cpu on which exchange
1277 * was originated, otherwise just use the current cpu.
1279 if (ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)
1280 cpu
= ntohs(fh
->fh_ox_id
) & fc_cpu_mask
;
1282 cpu
= smp_processor_id();
1284 fps
= &per_cpu(fcoe_percpu
, cpu
);
1285 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1286 if (unlikely(!fps
->thread
)) {
1288 * The targeted CPU is not ready, let's target
1289 * the first CPU now. For non-SMP systems this
1290 * will check the same CPU twice.
1292 FCOE_NETDEV_DBG(netdev
, "CPU is online, but no receive thread "
1293 "ready for incoming skb- using first online "
1296 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1297 cpu
= cpumask_first(cpu_online_mask
);
1298 fps
= &per_cpu(fcoe_percpu
, cpu
);
1299 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1301 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1307 * We now have a valid CPU that we're targeting for
1308 * this skb. We also have this receive thread locked,
1309 * so we're free to queue skbs into it's queue.
1312 /* If this is a SCSI-FCP frame, and this is already executing on the
1313 * correct CPU, and the queue for this CPU is empty, then go ahead
1314 * and process the frame directly in the softirq context.
1315 * This lets us process completions without context switching from the
1316 * NET_RX softirq, to our receive processing thread, and then back to
1317 * BLOCK softirq context.
1319 if (fh
->fh_type
== FC_TYPE_FCP
&&
1320 cpu
== smp_processor_id() &&
1321 skb_queue_empty(&fps
->fcoe_rx_list
)) {
1322 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1323 fcoe_recv_frame(skb
);
1325 __skb_queue_tail(&fps
->fcoe_rx_list
, skb
);
1326 if (fps
->fcoe_rx_list
.qlen
== 1)
1327 wake_up_process(fps
->thread
);
1328 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1333 per_cpu_ptr(lport
->dev_stats
, get_cpu())->ErrorFrames
++;
1341 * fcoe_start_io() - Start FCoE I/O
1342 * @skb: The packet to be transmitted
1344 * This routine is called from the net device to start transmitting
1347 * Returns: 0 for success
1349 static inline int fcoe_start_io(struct sk_buff
*skb
)
1351 struct sk_buff
*nskb
;
1354 nskb
= skb_clone(skb
, GFP_ATOMIC
);
1355 rc
= dev_queue_xmit(nskb
);
1363 * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1364 * @skb: The packet to be transmitted
1365 * @tlen: The total length of the trailer
1367 * This routine allocates a page for frame trailers. The page is re-used if
1368 * there is enough room left on it for the current trailer. If there isn't
1369 * enough buffer left a new page is allocated for the trailer. Reference to
1370 * the page from this function as well as the skbs using the page fragments
1371 * ensure that the page is freed at the appropriate time.
1373 * Returns: 0 for success
1375 static int fcoe_get_paged_crc_eof(struct sk_buff
*skb
, int tlen
)
1377 struct fcoe_percpu_s
*fps
;
1380 fps
= &get_cpu_var(fcoe_percpu
);
1381 page
= fps
->crc_eof_page
;
1383 page
= alloc_page(GFP_ATOMIC
);
1385 put_cpu_var(fcoe_percpu
);
1388 fps
->crc_eof_page
= page
;
1389 fps
->crc_eof_offset
= 0;
1393 skb_fill_page_desc(skb
, skb_shinfo(skb
)->nr_frags
, page
,
1394 fps
->crc_eof_offset
, tlen
);
1396 skb
->data_len
+= tlen
;
1397 skb
->truesize
+= tlen
;
1398 fps
->crc_eof_offset
+= sizeof(struct fcoe_crc_eof
);
1400 if (fps
->crc_eof_offset
>= PAGE_SIZE
) {
1401 fps
->crc_eof_page
= NULL
;
1402 fps
->crc_eof_offset
= 0;
1405 put_cpu_var(fcoe_percpu
);
1410 * fcoe_fc_crc() - Calculates the CRC for a given frame
1411 * @fp: The frame to be checksumed
1413 * This uses crc32() routine to calculate the CRC for a frame
1415 * Return: The 32 bit CRC value
1417 u32
fcoe_fc_crc(struct fc_frame
*fp
)
1419 struct sk_buff
*skb
= fp_skb(fp
);
1420 struct skb_frag_struct
*frag
;
1421 unsigned char *data
;
1422 unsigned long off
, len
, clen
;
1426 crc
= crc32(~0, skb
->data
, skb_headlen(skb
));
1428 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; i
++) {
1429 frag
= &skb_shinfo(skb
)->frags
[i
];
1430 off
= frag
->page_offset
;
1433 clen
= min(len
, PAGE_SIZE
- (off
& ~PAGE_MASK
));
1434 data
= kmap_atomic(frag
->page
+ (off
>> PAGE_SHIFT
),
1435 KM_SKB_DATA_SOFTIRQ
);
1436 crc
= crc32(crc
, data
+ (off
& ~PAGE_MASK
), clen
);
1437 kunmap_atomic(data
, KM_SKB_DATA_SOFTIRQ
);
1446 * fcoe_xmit() - Transmit a FCoE frame
1447 * @lport: The local port that the frame is to be transmitted for
1448 * @fp: The frame to be transmitted
1450 * Return: 0 for success
1452 int fcoe_xmit(struct fc_lport
*lport
, struct fc_frame
*fp
)
1457 struct fcoe_crc_eof
*cp
;
1458 struct sk_buff
*skb
;
1459 struct fcoe_dev_stats
*stats
;
1460 struct fc_frame_header
*fh
;
1461 unsigned int hlen
; /* header length implies the version */
1462 unsigned int tlen
; /* trailer length */
1463 unsigned int elen
; /* eth header, may include vlan */
1464 struct fcoe_port
*port
= lport_priv(lport
);
1465 struct fcoe_interface
*fcoe
= port
->fcoe
;
1467 struct fcoe_hdr
*hp
;
1469 WARN_ON((fr_len(fp
) % sizeof(u32
)) != 0);
1471 fh
= fc_frame_header_get(fp
);
1473 wlen
= skb
->len
/ FCOE_WORD_TO_BYTE
;
1475 if (!lport
->link_up
) {
1480 if (unlikely(fh
->fh_type
== FC_TYPE_ELS
) &&
1481 fcoe_ctlr_els_send(&fcoe
->ctlr
, lport
, skb
))
1487 elen
= sizeof(struct ethhdr
);
1488 hlen
= sizeof(struct fcoe_hdr
);
1489 tlen
= sizeof(struct fcoe_crc_eof
);
1490 wlen
= (skb
->len
- tlen
+ sizeof(crc
)) / FCOE_WORD_TO_BYTE
;
1493 if (likely(lport
->crc_offload
)) {
1494 skb
->ip_summed
= CHECKSUM_PARTIAL
;
1495 skb
->csum_start
= skb_headroom(skb
);
1496 skb
->csum_offset
= skb
->len
;
1499 skb
->ip_summed
= CHECKSUM_NONE
;
1500 crc
= fcoe_fc_crc(fp
);
1503 /* copy port crc and eof to the skb buff */
1504 if (skb_is_nonlinear(skb
)) {
1506 if (fcoe_get_paged_crc_eof(skb
, tlen
)) {
1510 frag
= &skb_shinfo(skb
)->frags
[skb_shinfo(skb
)->nr_frags
- 1];
1511 cp
= kmap_atomic(frag
->page
, KM_SKB_DATA_SOFTIRQ
)
1512 + frag
->page_offset
;
1514 cp
= (struct fcoe_crc_eof
*)skb_put(skb
, tlen
);
1517 memset(cp
, 0, sizeof(*cp
));
1519 cp
->fcoe_crc32
= cpu_to_le32(~crc
);
1521 if (skb_is_nonlinear(skb
)) {
1522 kunmap_atomic(cp
, KM_SKB_DATA_SOFTIRQ
);
1526 /* adjust skb network/transport offsets to match mac/fcoe/port */
1527 skb_push(skb
, elen
+ hlen
);
1528 skb_reset_mac_header(skb
);
1529 skb_reset_network_header(skb
);
1530 skb
->mac_len
= elen
;
1531 skb
->protocol
= htons(ETH_P_FCOE
);
1532 skb
->dev
= fcoe
->netdev
;
1534 /* fill up mac and fcoe headers */
1536 eh
->h_proto
= htons(ETH_P_FCOE
);
1537 memcpy(eh
->h_dest
, fcoe
->ctlr
.dest_addr
, ETH_ALEN
);
1538 if (fcoe
->ctlr
.map_dest
)
1539 memcpy(eh
->h_dest
+ 3, fh
->fh_d_id
, 3);
1541 if (unlikely(fcoe
->ctlr
.flogi_oxid
!= FC_XID_UNKNOWN
))
1542 memcpy(eh
->h_source
, fcoe
->ctlr
.ctl_src_addr
, ETH_ALEN
);
1544 memcpy(eh
->h_source
, port
->data_src_addr
, ETH_ALEN
);
1546 hp
= (struct fcoe_hdr
*)(eh
+ 1);
1547 memset(hp
, 0, sizeof(*hp
));
1549 FC_FCOE_ENCAPS_VER(hp
, FC_FCOE_VER
);
1552 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1553 if (lport
->seq_offload
&& fr_max_payload(fp
)) {
1554 skb_shinfo(skb
)->gso_type
= SKB_GSO_FCOE
;
1555 skb_shinfo(skb
)->gso_size
= fr_max_payload(fp
);
1557 skb_shinfo(skb
)->gso_type
= 0;
1558 skb_shinfo(skb
)->gso_size
= 0;
1560 /* update tx stats: regardless if LLD fails */
1561 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1563 stats
->TxWords
+= wlen
;
1566 /* send down to lld */
1568 if (port
->fcoe_pending_queue
.qlen
)
1569 fcoe_check_wait_queue(lport
, skb
);
1570 else if (fcoe_start_io(skb
))
1571 fcoe_check_wait_queue(lport
, skb
);
1577 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1578 * @skb: The completed skb (argument required by destructor)
1580 static void fcoe_percpu_flush_done(struct sk_buff
*skb
)
1582 complete(&fcoe_flush_completion
);
1586 * fcoe_recv_frame() - process a single received frame
1587 * @skb: frame to process
1589 static void fcoe_recv_frame(struct sk_buff
*skb
)
1592 struct fc_lport
*lport
;
1593 struct fcoe_rcv_info
*fr
;
1594 struct fcoe_dev_stats
*stats
;
1595 struct fc_frame_header
*fh
;
1596 struct fcoe_crc_eof crc_eof
;
1597 struct fc_frame
*fp
;
1598 struct fcoe_port
*port
;
1599 struct fcoe_hdr
*hp
;
1601 fr
= fcoe_dev_from_skb(skb
);
1603 if (unlikely(!lport
)) {
1604 if (skb
->destructor
!= fcoe_percpu_flush_done
)
1605 FCOE_NETDEV_DBG(skb
->dev
, "NULL lport in skb");
1610 FCOE_NETDEV_DBG(skb
->dev
, "skb_info: len:%d data_len:%d "
1611 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1612 skb
->len
, skb
->data_len
,
1613 skb
->head
, skb
->data
, skb_tail_pointer(skb
),
1614 skb_end_pointer(skb
), skb
->csum
,
1615 skb
->dev
? skb
->dev
->name
: "<NULL>");
1617 port
= lport_priv(lport
);
1618 if (skb_is_nonlinear(skb
))
1619 skb_linearize(skb
); /* not ideal */
1622 * Frame length checks and setting up the header pointers
1623 * was done in fcoe_rcv already.
1625 hp
= (struct fcoe_hdr
*) skb_network_header(skb
);
1626 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1628 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1629 if (unlikely(FC_FCOE_DECAPS_VER(hp
) != FC_FCOE_VER
)) {
1630 if (stats
->ErrorFrames
< 5)
1631 printk(KERN_WARNING
"fcoe: FCoE version "
1632 "mismatch: The frame has "
1633 "version %x, but the "
1634 "initiator supports version "
1635 "%x\n", FC_FCOE_DECAPS_VER(hp
),
1640 skb_pull(skb
, sizeof(struct fcoe_hdr
));
1641 fr_len
= skb
->len
- sizeof(struct fcoe_crc_eof
);
1644 stats
->RxWords
+= fr_len
/ FCOE_WORD_TO_BYTE
;
1646 fp
= (struct fc_frame
*)skb
;
1649 fr_sof(fp
) = hp
->fcoe_sof
;
1651 /* Copy out the CRC and EOF trailer for access */
1652 if (skb_copy_bits(skb
, fr_len
, &crc_eof
, sizeof(crc_eof
)))
1654 fr_eof(fp
) = crc_eof
.fcoe_eof
;
1655 fr_crc(fp
) = crc_eof
.fcoe_crc32
;
1656 if (pskb_trim(skb
, fr_len
))
1660 * We only check CRC if no offload is available and if it is
1661 * it's solicited data, in which case, the FCP layer would
1662 * check it during the copy.
1664 if (lport
->crc_offload
&&
1665 skb
->ip_summed
== CHECKSUM_UNNECESSARY
)
1666 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1668 fr_flags(fp
) |= FCPHF_CRC_UNCHECKED
;
1670 fh
= fc_frame_header_get(fp
);
1671 if ((fh
->fh_r_ctl
!= FC_RCTL_DD_SOL_DATA
||
1672 fh
->fh_type
!= FC_TYPE_FCP
) &&
1673 (fr_flags(fp
) & FCPHF_CRC_UNCHECKED
)) {
1674 if (le32_to_cpu(fr_crc(fp
)) !=
1675 ~crc32(~0, skb
->data
, fr_len
)) {
1676 if (stats
->InvalidCRCCount
< 5)
1677 printk(KERN_WARNING
"fcoe: dropping "
1678 "frame with CRC error\n");
1679 stats
->InvalidCRCCount
++;
1682 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1685 fc_exch_recv(lport
, fp
);
1689 stats
->ErrorFrames
++;
1695 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1696 * @arg: The per-CPU context
1698 * Return: 0 for success
1700 int fcoe_percpu_receive_thread(void *arg
)
1702 struct fcoe_percpu_s
*p
= arg
;
1703 struct sk_buff
*skb
;
1705 set_user_nice(current
, -20);
1707 while (!kthread_should_stop()) {
1709 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1710 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) == NULL
) {
1711 set_current_state(TASK_INTERRUPTIBLE
);
1712 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1714 set_current_state(TASK_RUNNING
);
1715 if (kthread_should_stop())
1717 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1719 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1720 fcoe_recv_frame(skb
);
1726 * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
1727 * @lport: The local port whose backlog is to be cleared
1729 * This empties the wait_queue, dequeues the head of the wait_queue queue
1730 * and calls fcoe_start_io() for each packet. If all skb have been
1731 * transmitted it returns the qlen. If an error occurs it restores
1732 * wait_queue (to try again later) and returns -1.
1734 * The wait_queue is used when the skb transmit fails. The failed skb
1735 * will go in the wait_queue which will be emptied by the timer function or
1736 * by the next skb transmit.
1738 static void fcoe_check_wait_queue(struct fc_lport
*lport
, struct sk_buff
*skb
)
1740 struct fcoe_port
*port
= lport_priv(lport
);
1743 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
1746 __skb_queue_tail(&port
->fcoe_pending_queue
, skb
);
1748 if (port
->fcoe_pending_queue_active
)
1750 port
->fcoe_pending_queue_active
= 1;
1752 while (port
->fcoe_pending_queue
.qlen
) {
1753 /* keep qlen > 0 until fcoe_start_io succeeds */
1754 port
->fcoe_pending_queue
.qlen
++;
1755 skb
= __skb_dequeue(&port
->fcoe_pending_queue
);
1757 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
1758 rc
= fcoe_start_io(skb
);
1759 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
1762 __skb_queue_head(&port
->fcoe_pending_queue
, skb
);
1763 /* undo temporary increment above */
1764 port
->fcoe_pending_queue
.qlen
--;
1767 /* undo temporary increment above */
1768 port
->fcoe_pending_queue
.qlen
--;
1771 if (port
->fcoe_pending_queue
.qlen
< FCOE_LOW_QUEUE_DEPTH
)
1773 if (port
->fcoe_pending_queue
.qlen
&& !timer_pending(&port
->timer
))
1774 mod_timer(&port
->timer
, jiffies
+ 2);
1775 port
->fcoe_pending_queue_active
= 0;
1777 if (port
->fcoe_pending_queue
.qlen
> FCOE_MAX_QUEUE_DEPTH
)
1779 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
1784 * fcoe_dev_setup() - Setup the link change notification interface
1786 static void fcoe_dev_setup(void)
1788 register_netdevice_notifier(&fcoe_notifier
);
1792 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1794 static void fcoe_dev_cleanup(void)
1796 unregister_netdevice_notifier(&fcoe_notifier
);
1800 * fcoe_device_notification() - Handler for net device events
1801 * @notifier: The context of the notification
1802 * @event: The type of event
1803 * @ptr: The net device that the event was on
1805 * This function is called by the Ethernet driver in case of link change event.
1807 * Returns: 0 for success
1809 static int fcoe_device_notification(struct notifier_block
*notifier
,
1810 ulong event
, void *ptr
)
1812 struct fc_lport
*lport
= NULL
;
1813 struct net_device
*netdev
= ptr
;
1814 struct fcoe_interface
*fcoe
;
1815 struct fcoe_port
*port
;
1816 struct fcoe_dev_stats
*stats
;
1817 u32 link_possible
= 1;
1821 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
1822 if (fcoe
->netdev
== netdev
) {
1823 lport
= fcoe
->ctlr
.lp
;
1834 case NETDEV_GOING_DOWN
:
1840 case NETDEV_CHANGEMTU
:
1841 if (netdev
->features
& NETIF_F_FCOE_MTU
)
1843 mfs
= netdev
->mtu
- (sizeof(struct fcoe_hdr
) +
1844 sizeof(struct fcoe_crc_eof
));
1845 if (mfs
>= FC_MIN_MAX_FRAME
)
1846 fc_set_mfs(lport
, mfs
);
1848 case NETDEV_REGISTER
:
1850 case NETDEV_UNREGISTER
:
1851 list_del(&fcoe
->list
);
1852 port
= lport_priv(fcoe
->ctlr
.lp
);
1853 fcoe_interface_cleanup(fcoe
);
1854 schedule_work(&port
->destroy_work
);
1858 FCOE_NETDEV_DBG(netdev
, "Unknown event %ld "
1859 "from netdev netlink\n", event
);
1862 fcoe_link_speed_update(lport
);
1864 if (link_possible
&& !fcoe_link_ok(lport
))
1865 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1866 else if (fcoe_ctlr_link_down(&fcoe
->ctlr
)) {
1867 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1868 stats
->LinkFailureCount
++;
1870 fcoe_clean_pending_queue(lport
);
1877 * fcoe_if_to_netdev() - Parse a name buffer to get a net device
1878 * @buffer: The name of the net device
1880 * Returns: NULL or a ptr to net_device
1882 static struct net_device
*fcoe_if_to_netdev(const char *buffer
)
1885 char ifname
[IFNAMSIZ
+ 2];
1888 strlcpy(ifname
, buffer
, IFNAMSIZ
);
1889 cp
= ifname
+ strlen(ifname
);
1890 while (--cp
>= ifname
&& *cp
== '\n')
1892 return dev_get_by_name(&init_net
, ifname
);
1898 * fcoe_disable() - Disables a FCoE interface
1899 * @buffer: The name of the Ethernet interface to be disabled
1900 * @kp: The associated kernel parameter
1902 * Called from sysfs.
1904 * Returns: 0 for success
1906 static int fcoe_disable(const char *buffer
, struct kernel_param
*kp
)
1908 struct fcoe_interface
*fcoe
;
1909 struct net_device
*netdev
;
1912 mutex_lock(&fcoe_config_mutex
);
1913 #ifdef CONFIG_FCOE_MODULE
1915 * Make sure the module has been initialized, and is not about to be
1916 * removed. Module paramter sysfs files are writable before the
1917 * module_init function is called and after module_exit.
1919 if (THIS_MODULE
->state
!= MODULE_STATE_LIVE
) {
1925 netdev
= fcoe_if_to_netdev(buffer
);
1931 if (!rtnl_trylock()) {
1933 mutex_unlock(&fcoe_config_mutex
);
1934 return restart_syscall();
1937 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1941 fcoe_ctlr_link_down(&fcoe
->ctlr
);
1942 fcoe_clean_pending_queue(fcoe
->ctlr
.lp
);
1948 mutex_unlock(&fcoe_config_mutex
);
1953 * fcoe_enable() - Enables a FCoE interface
1954 * @buffer: The name of the Ethernet interface to be enabled
1955 * @kp: The associated kernel parameter
1957 * Called from sysfs.
1959 * Returns: 0 for success
1961 static int fcoe_enable(const char *buffer
, struct kernel_param
*kp
)
1963 struct fcoe_interface
*fcoe
;
1964 struct net_device
*netdev
;
1967 mutex_lock(&fcoe_config_mutex
);
1968 #ifdef CONFIG_FCOE_MODULE
1970 * Make sure the module has been initialized, and is not about to be
1971 * removed. Module paramter sysfs files are writable before the
1972 * module_init function is called and after module_exit.
1974 if (THIS_MODULE
->state
!= MODULE_STATE_LIVE
) {
1980 netdev
= fcoe_if_to_netdev(buffer
);
1986 if (!rtnl_trylock()) {
1988 mutex_unlock(&fcoe_config_mutex
);
1989 return restart_syscall();
1992 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1997 else if (!fcoe_link_ok(fcoe
->ctlr
.lp
))
1998 fcoe_ctlr_link_up(&fcoe
->ctlr
);
2002 mutex_unlock(&fcoe_config_mutex
);
2007 * fcoe_destroy() - Destroy a FCoE interface
2008 * @buffer: The name of the Ethernet interface to be destroyed
2009 * @kp: The associated kernel parameter
2011 * Called from sysfs.
2013 * Returns: 0 for success
2015 static int fcoe_destroy(const char *buffer
, struct kernel_param
*kp
)
2017 struct fcoe_interface
*fcoe
;
2018 struct net_device
*netdev
;
2021 mutex_lock(&fcoe_config_mutex
);
2022 #ifdef CONFIG_FCOE_MODULE
2024 * Make sure the module has been initialized, and is not about to be
2025 * removed. Module paramter sysfs files are writable before the
2026 * module_init function is called and after module_exit.
2028 if (THIS_MODULE
->state
!= MODULE_STATE_LIVE
) {
2034 netdev
= fcoe_if_to_netdev(buffer
);
2040 if (!rtnl_trylock()) {
2042 mutex_unlock(&fcoe_config_mutex
);
2043 return restart_syscall();
2046 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2052 list_del(&fcoe
->list
);
2053 fcoe_interface_cleanup(fcoe
);
2054 /* RTNL mutex is dropped by fcoe_if_destroy */
2055 fcoe_if_destroy(fcoe
->ctlr
.lp
);
2060 mutex_unlock(&fcoe_config_mutex
);
2065 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2066 * @work: Handle to the FCoE port to be destroyed
2068 static void fcoe_destroy_work(struct work_struct
*work
)
2070 struct fcoe_port
*port
;
2072 port
= container_of(work
, struct fcoe_port
, destroy_work
);
2073 mutex_lock(&fcoe_config_mutex
);
2075 /* RTNL mutex is dropped by fcoe_if_destroy */
2076 fcoe_if_destroy(port
->lport
);
2077 mutex_unlock(&fcoe_config_mutex
);
2081 * fcoe_create() - Create a fcoe interface
2082 * @buffer: The name of the Ethernet interface to create on
2083 * @kp: The associated kernel param
2085 * Called from sysfs.
2087 * Returns: 0 for success
2089 static int fcoe_create(const char *buffer
, struct kernel_param
*kp
)
2092 struct fcoe_interface
*fcoe
;
2093 struct fc_lport
*lport
;
2094 struct net_device
*netdev
;
2096 mutex_lock(&fcoe_config_mutex
);
2098 if (!rtnl_trylock()) {
2099 mutex_unlock(&fcoe_config_mutex
);
2100 return restart_syscall();
2103 #ifdef CONFIG_FCOE_MODULE
2105 * Make sure the module has been initialized, and is not about to be
2106 * removed. Module paramter sysfs files are writable before the
2107 * module_init function is called and after module_exit.
2109 if (THIS_MODULE
->state
!= MODULE_STATE_LIVE
) {
2115 if (!try_module_get(THIS_MODULE
)) {
2120 netdev
= fcoe_if_to_netdev(buffer
);
2126 /* look for existing lport */
2127 if (fcoe_hostlist_lookup(netdev
)) {
2132 fcoe
= fcoe_interface_create(netdev
);
2138 lport
= fcoe_if_create(fcoe
, &netdev
->dev
, 0);
2139 if (IS_ERR(lport
)) {
2140 printk(KERN_ERR
"fcoe: Failed to create interface (%s)\n",
2143 fcoe_interface_cleanup(fcoe
);
2147 /* Make this the "master" N_Port */
2148 fcoe
->ctlr
.lp
= lport
;
2150 /* add to lports list */
2151 fcoe_hostlist_add(lport
);
2153 /* start FIP Discovery and FLOGI */
2154 lport
->boot_time
= jiffies
;
2155 fc_fabric_login(lport
);
2156 if (!fcoe_link_ok(lport
))
2157 fcoe_ctlr_link_up(&fcoe
->ctlr
);
2160 * Release from init in fcoe_interface_create(), on success lport
2161 * should be holding a reference taken in fcoe_if_create().
2163 fcoe_interface_put(fcoe
);
2166 mutex_unlock(&fcoe_config_mutex
);
2170 fcoe_interface_put(fcoe
);
2174 module_put(THIS_MODULE
);
2177 mutex_unlock(&fcoe_config_mutex
);
2182 * fcoe_link_speed_update() - Update the supported and actual link speeds
2183 * @lport: The local port to update speeds for
2185 * Returns: 0 if the ethtool query was successful
2186 * -1 if the ethtool query failed
2188 int fcoe_link_speed_update(struct fc_lport
*lport
)
2190 struct fcoe_port
*port
= lport_priv(lport
);
2191 struct net_device
*netdev
= port
->fcoe
->netdev
;
2192 struct ethtool_cmd ecmd
= { ETHTOOL_GSET
};
2194 if (!dev_ethtool_get_settings(netdev
, &ecmd
)) {
2195 lport
->link_supported_speeds
&=
2196 ~(FC_PORTSPEED_1GBIT
| FC_PORTSPEED_10GBIT
);
2197 if (ecmd
.supported
& (SUPPORTED_1000baseT_Half
|
2198 SUPPORTED_1000baseT_Full
))
2199 lport
->link_supported_speeds
|= FC_PORTSPEED_1GBIT
;
2200 if (ecmd
.supported
& SUPPORTED_10000baseT_Full
)
2201 lport
->link_supported_speeds
|=
2202 FC_PORTSPEED_10GBIT
;
2203 if (ecmd
.speed
== SPEED_1000
)
2204 lport
->link_speed
= FC_PORTSPEED_1GBIT
;
2205 if (ecmd
.speed
== SPEED_10000
)
2206 lport
->link_speed
= FC_PORTSPEED_10GBIT
;
2214 * fcoe_link_ok() - Check if the link is OK for a local port
2215 * @lport: The local port to check link on
2217 * Returns: 0 if link is UP and OK, -1 if not
2220 int fcoe_link_ok(struct fc_lport
*lport
)
2222 struct fcoe_port
*port
= lport_priv(lport
);
2223 struct net_device
*netdev
= port
->fcoe
->netdev
;
2225 if (netif_oper_up(netdev
))
2231 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2232 * @lport: The local port whose skbs are to be cleared
2234 * Must be called with fcoe_create_mutex held to single-thread completion.
2236 * This flushes the pending skbs by adding a new skb to each queue and
2237 * waiting until they are all freed. This assures us that not only are
2238 * there no packets that will be handled by the lport, but also that any
2239 * threads already handling packet have returned.
2241 void fcoe_percpu_clean(struct fc_lport
*lport
)
2243 struct fcoe_percpu_s
*pp
;
2244 struct fcoe_rcv_info
*fr
;
2245 struct sk_buff_head
*list
;
2246 struct sk_buff
*skb
, *next
;
2247 struct sk_buff
*head
;
2250 for_each_possible_cpu(cpu
) {
2251 pp
= &per_cpu(fcoe_percpu
, cpu
);
2252 spin_lock_bh(&pp
->fcoe_rx_list
.lock
);
2253 list
= &pp
->fcoe_rx_list
;
2255 for (skb
= head
; skb
!= (struct sk_buff
*)list
;
2258 fr
= fcoe_dev_from_skb(skb
);
2259 if (fr
->fr_dev
== lport
) {
2260 __skb_unlink(skb
, list
);
2265 if (!pp
->thread
|| !cpu_online(cpu
)) {
2266 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2270 skb
= dev_alloc_skb(0);
2272 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2275 skb
->destructor
= fcoe_percpu_flush_done
;
2277 __skb_queue_tail(&pp
->fcoe_rx_list
, skb
);
2278 if (pp
->fcoe_rx_list
.qlen
== 1)
2279 wake_up_process(pp
->thread
);
2280 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2282 wait_for_completion(&fcoe_flush_completion
);
2287 * fcoe_clean_pending_queue() - Dequeue a skb and free it
2288 * @lport: The local port to dequeue a skb on
2290 void fcoe_clean_pending_queue(struct fc_lport
*lport
)
2292 struct fcoe_port
*port
= lport_priv(lport
);
2293 struct sk_buff
*skb
;
2295 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
2296 while ((skb
= __skb_dequeue(&port
->fcoe_pending_queue
)) != NULL
) {
2297 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
2299 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
2301 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
2305 * fcoe_reset() - Reset a local port
2306 * @shost: The SCSI host associated with the local port to be reset
2308 * Returns: Always 0 (return value required by FC transport template)
2310 int fcoe_reset(struct Scsi_Host
*shost
)
2312 struct fc_lport
*lport
= shost_priv(shost
);
2313 fc_lport_reset(lport
);
2318 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2319 * @netdev: The net device used as a key
2321 * Locking: Must be called with the RNL mutex held.
2323 * Returns: NULL or the FCoE interface
2325 static struct fcoe_interface
*
2326 fcoe_hostlist_lookup_port(const struct net_device
*netdev
)
2328 struct fcoe_interface
*fcoe
;
2330 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
2331 if (fcoe
->netdev
== netdev
)
2338 * fcoe_hostlist_lookup() - Find the local port associated with a
2340 * @netdev: The netdevice used as a key
2342 * Locking: Must be called with the RTNL mutex held
2344 * Returns: NULL or the local port
2346 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*netdev
)
2348 struct fcoe_interface
*fcoe
;
2350 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2351 return (fcoe
) ? fcoe
->ctlr
.lp
: NULL
;
2355 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2356 * port to the hostlist
2357 * @lport: The local port that identifies the FCoE interface to be added
2359 * Locking: must be called with the RTNL mutex held
2361 * Returns: 0 for success
2363 static int fcoe_hostlist_add(const struct fc_lport
*lport
)
2365 struct fcoe_interface
*fcoe
;
2366 struct fcoe_port
*port
;
2368 fcoe
= fcoe_hostlist_lookup_port(fcoe_netdev(lport
));
2370 port
= lport_priv(lport
);
2372 list_add_tail(&fcoe
->list
, &fcoe_hostlist
);
2378 * fcoe_init() - Initialize fcoe.ko
2380 * Returns: 0 on success, or a negative value on failure
2382 static int __init
fcoe_init(void)
2384 struct fcoe_percpu_s
*p
;
2388 mutex_lock(&fcoe_config_mutex
);
2390 for_each_possible_cpu(cpu
) {
2391 p
= &per_cpu(fcoe_percpu
, cpu
);
2392 skb_queue_head_init(&p
->fcoe_rx_list
);
2395 for_each_online_cpu(cpu
)
2396 fcoe_percpu_thread_create(cpu
);
2398 /* Initialize per CPU interrupt thread */
2399 rc
= register_hotcpu_notifier(&fcoe_cpu_notifier
);
2403 /* Setup link change notification */
2406 rc
= fcoe_if_init();
2410 mutex_unlock(&fcoe_config_mutex
);
2414 for_each_online_cpu(cpu
) {
2415 fcoe_percpu_thread_destroy(cpu
);
2417 mutex_unlock(&fcoe_config_mutex
);
2420 module_init(fcoe_init
);
2423 * fcoe_exit() - Clean up fcoe.ko
2425 * Returns: 0 on success or a negative value on failure
2427 static void __exit
fcoe_exit(void)
2429 struct fcoe_interface
*fcoe
, *tmp
;
2430 struct fcoe_port
*port
;
2433 mutex_lock(&fcoe_config_mutex
);
2437 /* releases the associated fcoe hosts */
2439 list_for_each_entry_safe(fcoe
, tmp
, &fcoe_hostlist
, list
) {
2440 list_del(&fcoe
->list
);
2441 port
= lport_priv(fcoe
->ctlr
.lp
);
2442 fcoe_interface_cleanup(fcoe
);
2443 schedule_work(&port
->destroy_work
);
2447 unregister_hotcpu_notifier(&fcoe_cpu_notifier
);
2449 for_each_online_cpu(cpu
)
2450 fcoe_percpu_thread_destroy(cpu
);
2452 mutex_unlock(&fcoe_config_mutex
);
2454 /* flush any asyncronous interface destroys,
2455 * this should happen after the netdev notifier is unregistered */
2456 flush_scheduled_work();
2457 /* That will flush out all the N_Ports on the hostlist, but now we
2458 * may have NPIV VN_Ports scheduled for destruction */
2459 flush_scheduled_work();
2461 /* detach from scsi transport
2462 * must happen after all destroys are done, therefor after the flush */
2465 module_exit(fcoe_exit
);
2468 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2469 * @seq: active sequence in the FLOGI or FDISC exchange
2470 * @fp: response frame, or error encoded in a pointer (timeout)
2471 * @arg: pointer the the fcoe_ctlr structure
2473 * This handles MAC address managment for FCoE, then passes control on to
2474 * the libfc FLOGI response handler.
2476 static void fcoe_flogi_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2478 struct fcoe_ctlr
*fip
= arg
;
2479 struct fc_exch
*exch
= fc_seq_exch(seq
);
2480 struct fc_lport
*lport
= exch
->lp
;
2486 mac
= fr_cb(fp
)->granted_mac
;
2487 if (is_zero_ether_addr(mac
)) {
2489 if (fcoe_ctlr_recv_flogi(fip
, lport
, fp
)) {
2494 fcoe_update_src_mac(lport
, mac
);
2496 fc_lport_flogi_resp(seq
, fp
, lport
);
2500 * fcoe_logo_resp() - FCoE specific LOGO response handler
2501 * @seq: active sequence in the LOGO exchange
2502 * @fp: response frame, or error encoded in a pointer (timeout)
2503 * @arg: pointer the the fcoe_ctlr structure
2505 * This handles MAC address managment for FCoE, then passes control on to
2506 * the libfc LOGO response handler.
2508 static void fcoe_logo_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2510 struct fc_lport
*lport
= arg
;
2511 static u8 zero_mac
[ETH_ALEN
] = { 0 };
2514 fcoe_update_src_mac(lport
, zero_mac
);
2515 fc_lport_logo_resp(seq
, fp
, lport
);
2519 * fcoe_elsct_send - FCoE specific ELS handler
2521 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2522 * using FCoE specific response handlers and passing the FIP controller as
2523 * the argument (the lport is still available from the exchange).
2525 * Most of the work here is just handed off to the libfc routine.
2527 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*lport
, u32 did
,
2528 struct fc_frame
*fp
, unsigned int op
,
2529 void (*resp
)(struct fc_seq
*,
2532 void *arg
, u32 timeout
)
2534 struct fcoe_port
*port
= lport_priv(lport
);
2535 struct fcoe_interface
*fcoe
= port
->fcoe
;
2536 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
2537 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
2542 if (lport
->point_to_multipoint
)
2544 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_flogi_resp
,
2547 /* only hook onto fabric logouts, not port logouts */
2548 if (ntoh24(fh
->fh_d_id
) != FC_FID_FLOGI
)
2550 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_logo_resp
,
2553 return fc_elsct_send(lport
, did
, fp
, op
, resp
, arg
, timeout
);
2557 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2558 * @vport: fc_vport object to create a new fc_host for
2559 * @disabled: start the new fc_host in a disabled state by default?
2561 * Returns: 0 for success
2563 static int fcoe_vport_create(struct fc_vport
*vport
, bool disabled
)
2565 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2566 struct fc_lport
*n_port
= shost_priv(shost
);
2567 struct fcoe_port
*port
= lport_priv(n_port
);
2568 struct fcoe_interface
*fcoe
= port
->fcoe
;
2569 struct net_device
*netdev
= fcoe
->netdev
;
2570 struct fc_lport
*vn_port
;
2572 mutex_lock(&fcoe_config_mutex
);
2573 vn_port
= fcoe_if_create(fcoe
, &vport
->dev
, 1);
2574 mutex_unlock(&fcoe_config_mutex
);
2576 if (IS_ERR(vn_port
)) {
2577 printk(KERN_ERR
"fcoe: fcoe_vport_create(%s) failed\n",
2583 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2585 vn_port
->boot_time
= jiffies
;
2586 fc_fabric_login(vn_port
);
2587 fc_vport_setlink(vn_port
);
2593 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2594 * @vport: fc_vport object that is being destroyed
2596 * Returns: 0 for success
2598 static int fcoe_vport_destroy(struct fc_vport
*vport
)
2600 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2601 struct fc_lport
*n_port
= shost_priv(shost
);
2602 struct fc_lport
*vn_port
= vport
->dd_data
;
2603 struct fcoe_port
*port
= lport_priv(vn_port
);
2605 mutex_lock(&n_port
->lp_mutex
);
2606 list_del(&vn_port
->list
);
2607 mutex_unlock(&n_port
->lp_mutex
);
2608 schedule_work(&port
->destroy_work
);
2613 * fcoe_vport_disable() - change vport state
2614 * @vport: vport to bring online/offline
2615 * @disable: should the vport be disabled?
2617 static int fcoe_vport_disable(struct fc_vport
*vport
, bool disable
)
2619 struct fc_lport
*lport
= vport
->dd_data
;
2622 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2623 fc_fabric_logoff(lport
);
2625 lport
->boot_time
= jiffies
;
2626 fc_fabric_login(lport
);
2627 fc_vport_setlink(lport
);
2634 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2635 * @vport: fc_vport with a new symbolic name string
2637 * After generating a new symbolic name string, a new RSPN_ID request is
2638 * sent to the name server. There is no response handler, so if it fails
2639 * for some reason it will not be retried.
2641 static void fcoe_set_vport_symbolic_name(struct fc_vport
*vport
)
2643 struct fc_lport
*lport
= vport
->dd_data
;
2644 struct fc_frame
*fp
;
2647 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
2648 "%s v%s over %s : %s", FCOE_NAME
, FCOE_VERSION
,
2649 fcoe_netdev(lport
)->name
, vport
->symbolic_name
);
2651 if (lport
->state
!= LPORT_ST_READY
)
2654 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
2655 fp
= fc_frame_alloc(lport
,
2656 sizeof(struct fc_ct_hdr
) +
2657 sizeof(struct fc_ns_rspn
) + len
);
2660 lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, FC_NS_RSPN_ID
,
2661 NULL
, NULL
, 3 * lport
->r_a_tov
);
2665 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2666 * @lport: the local port
2667 * @fc_lesb: the link error status block
2669 static void fcoe_get_lesb(struct fc_lport
*lport
,
2670 struct fc_els_lesb
*fc_lesb
)
2673 u32 lfc
, vlfc
, mdac
;
2674 struct fcoe_dev_stats
*devst
;
2675 struct fcoe_fc_els_lesb
*lesb
;
2676 struct net_device
*netdev
= fcoe_netdev(lport
);
2681 lesb
= (struct fcoe_fc_els_lesb
*)fc_lesb
;
2682 memset(lesb
, 0, sizeof(*lesb
));
2683 for_each_possible_cpu(cpu
) {
2684 devst
= per_cpu_ptr(lport
->dev_stats
, cpu
);
2685 lfc
+= devst
->LinkFailureCount
;
2686 vlfc
+= devst
->VLinkFailureCount
;
2687 mdac
+= devst
->MissDiscAdvCount
;
2689 lesb
->lesb_link_fail
= htonl(lfc
);
2690 lesb
->lesb_vlink_fail
= htonl(vlfc
);
2691 lesb
->lesb_miss_fka
= htonl(mdac
);
2692 lesb
->lesb_fcs_error
= htonl(dev_get_stats(netdev
)->rx_crc_errors
);
2696 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2697 * @lport: the local port
2698 * @port_id: the port ID
2699 * @fp: the received frame, if any, that caused the port_id to be set.
2701 * This routine handles the case where we received a FLOGI and are
2702 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2703 * so it can set the non-mapped mode and gateway address.
2705 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2707 static void fcoe_set_port_id(struct fc_lport
*lport
,
2708 u32 port_id
, struct fc_frame
*fp
)
2710 struct fcoe_port
*port
= lport_priv(lport
);
2711 struct fcoe_interface
*fcoe
= port
->fcoe
;
2713 if (fp
&& fc_frame_payload_op(fp
) == ELS_FLOGI
)
2714 fcoe_ctlr_recv_flogi(&fcoe
->ctlr
, lport
, fp
);