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_unicast_add(netdev
, flogi_maddr
);
317 dev_unicast_add(netdev
, fip
->ctl_src_addr
);
318 dev_mc_add(netdev
, FIP_ALL_ENODE_MACS
, ETH_ALEN
, 0);
321 * setup the receive function from ethernet driver
322 * on the ethertype for the given device
324 fcoe
->fcoe_packet_type
.func
= fcoe_rcv
;
325 fcoe
->fcoe_packet_type
.type
= __constant_htons(ETH_P_FCOE
);
326 fcoe
->fcoe_packet_type
.dev
= netdev
;
327 dev_add_pack(&fcoe
->fcoe_packet_type
);
329 fcoe
->fip_packet_type
.func
= fcoe_fip_recv
;
330 fcoe
->fip_packet_type
.type
= htons(ETH_P_FIP
);
331 fcoe
->fip_packet_type
.dev
= netdev
;
332 dev_add_pack(&fcoe
->fip_packet_type
);
338 * fcoe_interface_create() - Create a FCoE interface on a net device
339 * @netdev: The net device to create the FCoE interface on
341 * Returns: pointer to a struct fcoe_interface or NULL on error
343 static struct fcoe_interface
*fcoe_interface_create(struct net_device
*netdev
)
345 struct fcoe_interface
*fcoe
;
348 fcoe
= kzalloc(sizeof(*fcoe
), GFP_KERNEL
);
350 FCOE_NETDEV_DBG(netdev
, "Could not allocate fcoe structure\n");
355 kref_init(&fcoe
->kref
);
360 fcoe_ctlr_init(&fcoe
->ctlr
);
361 fcoe
->ctlr
.send
= fcoe_fip_send
;
362 fcoe
->ctlr
.update_mac
= fcoe_update_src_mac
;
363 fcoe
->ctlr
.get_src_addr
= fcoe_get_src_mac
;
365 err
= fcoe_interface_setup(fcoe
, netdev
);
367 fcoe_ctlr_destroy(&fcoe
->ctlr
);
377 * fcoe_interface_cleanup() - Clean up a FCoE interface
378 * @fcoe: The FCoE interface to be cleaned up
380 * Caller must be holding the RTNL mutex
382 void fcoe_interface_cleanup(struct fcoe_interface
*fcoe
)
384 struct net_device
*netdev
= fcoe
->netdev
;
385 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
386 u8 flogi_maddr
[ETH_ALEN
];
387 const struct net_device_ops
*ops
;
390 * Don't listen for Ethernet packets anymore.
391 * synchronize_net() ensures that the packet handlers are not running
392 * on another CPU. dev_remove_pack() would do that, this calls the
393 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
395 __dev_remove_pack(&fcoe
->fcoe_packet_type
);
396 __dev_remove_pack(&fcoe
->fip_packet_type
);
399 /* Delete secondary MAC addresses */
400 memcpy(flogi_maddr
, (u8
[6]) FC_FCOE_FLOGI_MAC
, ETH_ALEN
);
401 dev_unicast_delete(netdev
, flogi_maddr
);
403 dev_unicast_delete(netdev
, fip
->ctl_src_addr
);
404 dev_mc_delete(netdev
, FIP_ALL_ENODE_MACS
, ETH_ALEN
, 0);
406 /* Tell the LLD we are done w/ FCoE */
407 ops
= netdev
->netdev_ops
;
408 if (ops
->ndo_fcoe_disable
) {
409 if (ops
->ndo_fcoe_disable(netdev
))
410 FCOE_NETDEV_DBG(netdev
, "Failed to disable FCoE"
411 " specific feature for LLD.\n");
416 * fcoe_interface_release() - fcoe_port kref release function
417 * @kref: Embedded reference count in an fcoe_interface struct
419 static void fcoe_interface_release(struct kref
*kref
)
421 struct fcoe_interface
*fcoe
;
422 struct net_device
*netdev
;
424 fcoe
= container_of(kref
, struct fcoe_interface
, kref
);
425 netdev
= fcoe
->netdev
;
426 /* tear-down the FCoE controller */
427 fcoe_ctlr_destroy(&fcoe
->ctlr
);
433 * fcoe_interface_get() - Get a reference to a FCoE interface
434 * @fcoe: The FCoE interface to be held
436 static inline void fcoe_interface_get(struct fcoe_interface
*fcoe
)
438 kref_get(&fcoe
->kref
);
442 * fcoe_interface_put() - Put a reference to a FCoE interface
443 * @fcoe: The FCoE interface to be released
445 static inline void fcoe_interface_put(struct fcoe_interface
*fcoe
)
447 kref_put(&fcoe
->kref
, fcoe_interface_release
);
451 * fcoe_fip_recv() - Handler for received FIP frames
452 * @skb: The receive skb
453 * @netdev: The associated net device
454 * @ptype: The packet_type structure which was used to register this handler
455 * @orig_dev: The original net_device the the skb was received on.
456 * (in case dev is a bond)
458 * Returns: 0 for success
460 static int fcoe_fip_recv(struct sk_buff
*skb
, struct net_device
*netdev
,
461 struct packet_type
*ptype
,
462 struct net_device
*orig_dev
)
464 struct fcoe_interface
*fcoe
;
466 fcoe
= container_of(ptype
, struct fcoe_interface
, fip_packet_type
);
467 fcoe_ctlr_recv(&fcoe
->ctlr
, skb
);
472 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
473 * @fip: The FCoE controller
474 * @skb: The FIP packet to be sent
476 static void fcoe_fip_send(struct fcoe_ctlr
*fip
, struct sk_buff
*skb
)
478 skb
->dev
= fcoe_from_ctlr(fip
)->netdev
;
483 * fcoe_update_src_mac() - Update the Ethernet MAC filters
484 * @lport: The local port to update the source MAC on
485 * @addr: Unicast MAC address to add
487 * Remove any previously-set unicast MAC filter.
488 * Add secondary FCoE MAC address filter for our OUI.
490 static void fcoe_update_src_mac(struct fc_lport
*lport
, u8
*addr
)
492 struct fcoe_port
*port
= lport_priv(lport
);
493 struct fcoe_interface
*fcoe
= port
->fcoe
;
496 if (!is_zero_ether_addr(port
->data_src_addr
))
497 dev_unicast_delete(fcoe
->netdev
, port
->data_src_addr
);
498 if (!is_zero_ether_addr(addr
))
499 dev_unicast_add(fcoe
->netdev
, addr
);
500 memcpy(port
->data_src_addr
, addr
, ETH_ALEN
);
505 * fcoe_get_src_mac() - return the Ethernet source address for an lport
506 * @lport: libfc lport
508 static u8
*fcoe_get_src_mac(struct fc_lport
*lport
)
510 struct fcoe_port
*port
= lport_priv(lport
);
512 return port
->data_src_addr
;
516 * fcoe_lport_config() - Set up a local port
517 * @lport: The local port to be setup
519 * Returns: 0 for success
521 static int fcoe_lport_config(struct fc_lport
*lport
)
525 lport
->max_retry_count
= 3;
526 lport
->max_rport_retry_count
= 3;
527 lport
->e_d_tov
= 2 * 1000; /* FC-FS default */
528 lport
->r_a_tov
= 2 * 2 * 1000;
529 lport
->service_params
= (FCP_SPPF_INIT_FCN
| FCP_SPPF_RD_XRDY_DIS
|
530 FCP_SPPF_RETRY
| FCP_SPPF_CONF_COMPL
);
531 lport
->does_npiv
= 1;
533 fc_lport_init_stats(lport
);
535 /* lport fc_lport related configuration */
536 fc_lport_config(lport
);
538 /* offload related configuration */
539 lport
->crc_offload
= 0;
540 lport
->seq_offload
= 0;
541 lport
->lro_enabled
= 0;
549 * fcoe_queue_timer() - The fcoe queue timer
550 * @lport: The local port
552 * Calls fcoe_check_wait_queue on timeout
554 static void fcoe_queue_timer(ulong lport
)
556 fcoe_check_wait_queue((struct fc_lport
*)lport
, NULL
);
560 * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
561 * @netdev: the associated net device
562 * @wwn: the output WWN
563 * @type: the type of WWN (WWPN or WWNN)
565 * Returns: 0 for success
567 static int fcoe_get_wwn(struct net_device
*netdev
, u64
*wwn
, int type
)
569 const struct net_device_ops
*ops
= netdev
->netdev_ops
;
571 if (ops
->ndo_fcoe_get_wwn
)
572 return ops
->ndo_fcoe_get_wwn(netdev
, wwn
, type
);
577 * fcoe_netdev_config() - Set up net devive for SW FCoE
578 * @lport: The local port that is associated with the net device
579 * @netdev: The associated net device
581 * Must be called after fcoe_lport_config() as it will use local port mutex
583 * Returns: 0 for success
585 static int fcoe_netdev_config(struct fc_lport
*lport
, struct net_device
*netdev
)
589 struct fcoe_interface
*fcoe
;
590 struct fcoe_port
*port
;
593 /* Setup lport private data to point to fcoe softc */
594 port
= lport_priv(lport
);
598 * Determine max frame size based on underlying device and optional
599 * user-configured limit. If the MFS is too low, fcoe_link_ok()
600 * will return 0, so do this first.
603 if (netdev
->features
& NETIF_F_FCOE_MTU
) {
605 FCOE_NETDEV_DBG(netdev
, "Supports FCOE_MTU of %d bytes\n", mfs
);
607 mfs
-= (sizeof(struct fcoe_hdr
) + sizeof(struct fcoe_crc_eof
));
608 if (fc_set_mfs(lport
, mfs
))
611 /* offload features support */
612 if (netdev
->features
& NETIF_F_SG
)
615 if (netdev
->features
& NETIF_F_FCOE_CRC
) {
616 lport
->crc_offload
= 1;
617 FCOE_NETDEV_DBG(netdev
, "Supports FCCRC offload\n");
619 if (netdev
->features
& NETIF_F_FSO
) {
620 lport
->seq_offload
= 1;
621 lport
->lso_max
= netdev
->gso_max_size
;
622 FCOE_NETDEV_DBG(netdev
, "Supports LSO for max len 0x%x\n",
625 if (netdev
->fcoe_ddp_xid
) {
626 lport
->lro_enabled
= 1;
627 lport
->lro_xid
= netdev
->fcoe_ddp_xid
;
628 FCOE_NETDEV_DBG(netdev
, "Supports LRO for max xid 0x%x\n",
631 skb_queue_head_init(&port
->fcoe_pending_queue
);
632 port
->fcoe_pending_queue_active
= 0;
633 setup_timer(&port
->timer
, fcoe_queue_timer
, (unsigned long)lport
);
635 fcoe_link_speed_update(lport
);
639 * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN:
640 * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0.
641 * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID
643 if (netdev
->priv_flags
& IFF_802_1Q_VLAN
)
644 vid
= vlan_dev_vlan_id(netdev
);
646 if (fcoe_get_wwn(netdev
, &wwnn
, NETDEV_FCOE_WWNN
))
647 wwnn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
, 1, 0);
648 fc_set_wwnn(lport
, wwnn
);
649 if (fcoe_get_wwn(netdev
, &wwpn
, NETDEV_FCOE_WWPN
))
650 wwpn
= fcoe_wwn_from_mac(fcoe
->ctlr
.ctl_src_addr
,
652 fc_set_wwpn(lport
, wwpn
);
659 * fcoe_shost_config() - Set up the SCSI host associated with a local port
660 * @lport: The local port
661 * @dev: The device associated with the SCSI host
663 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
665 * Returns: 0 for success
667 static int fcoe_shost_config(struct fc_lport
*lport
, struct device
*dev
)
671 /* lport scsi host config */
672 lport
->host
->max_lun
= FCOE_MAX_LUN
;
673 lport
->host
->max_id
= FCOE_MAX_FCP_TARGET
;
674 lport
->host
->max_channel
= 0;
675 lport
->host
->max_cmd_len
= FCOE_MAX_CMD_LEN
;
678 lport
->host
->transportt
= fcoe_vport_transport_template
;
680 lport
->host
->transportt
= fcoe_transport_template
;
682 /* add the new host to the SCSI-ml */
683 rc
= scsi_add_host(lport
->host
, dev
);
685 FCOE_NETDEV_DBG(fcoe_netdev(lport
), "fcoe_shost_config: "
686 "error on scsi_add_host\n");
691 fc_host_max_npiv_vports(lport
->host
) = USHORT_MAX
;
693 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
694 "%s v%s over %s", FCOE_NAME
, FCOE_VERSION
,
695 fcoe_netdev(lport
)->name
);
701 * fcoe_oem_match() - The match routine for the offloaded exchange manager
704 * This routine will be associated with an exchange manager (EM). When
705 * the libfc exchange handling code is looking for an EM to use it will
706 * call this routine and pass it the frame that it wishes to send. This
707 * routine will return True if the associated EM is to be used and False
708 * if the echange code should continue looking for an EM.
710 * The offload EM that this routine is associated with will handle any
711 * packets that are for SCSI read requests.
713 * Returns: True for read types I/O, otherwise returns false.
715 bool fcoe_oem_match(struct fc_frame
*fp
)
717 return fc_fcp_is_read(fr_fsp(fp
)) &&
718 (fr_fsp(fp
)->data_len
> fcoe_ddp_min
);
722 * fcoe_em_config() - Allocate and configure an exchange manager
723 * @lport: The local port that the new EM will be associated with
725 * Returns: 0 on success
727 static inline int fcoe_em_config(struct fc_lport
*lport
)
729 struct fcoe_port
*port
= lport_priv(lport
);
730 struct fcoe_interface
*fcoe
= port
->fcoe
;
731 struct fcoe_interface
*oldfcoe
= NULL
;
732 struct net_device
*old_real_dev
, *cur_real_dev
;
733 u16 min_xid
= FCOE_MIN_XID
;
734 u16 max_xid
= FCOE_MAX_XID
;
737 * Check if need to allocate an em instance for
738 * offload exchange ids to be shared across all VN_PORTs/lport.
740 if (!lport
->lro_enabled
|| !lport
->lro_xid
||
741 (lport
->lro_xid
>= max_xid
)) {
747 * Reuse existing offload em instance in case
748 * it is already allocated on real eth device
750 if (fcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
751 cur_real_dev
= vlan_dev_real_dev(fcoe
->netdev
);
753 cur_real_dev
= fcoe
->netdev
;
755 list_for_each_entry(oldfcoe
, &fcoe_hostlist
, list
) {
756 if (oldfcoe
->netdev
->priv_flags
& IFF_802_1Q_VLAN
)
757 old_real_dev
= vlan_dev_real_dev(oldfcoe
->netdev
);
759 old_real_dev
= oldfcoe
->netdev
;
761 if (cur_real_dev
== old_real_dev
) {
762 fcoe
->oem
= oldfcoe
->oem
;
768 if (!fc_exch_mgr_add(lport
, fcoe
->oem
, fcoe_oem_match
)) {
769 printk(KERN_ERR
"fcoe_em_config: failed to add "
770 "offload em:%p on interface:%s\n",
771 fcoe
->oem
, fcoe
->netdev
->name
);
775 fcoe
->oem
= fc_exch_mgr_alloc(lport
, FC_CLASS_3
,
776 FCOE_MIN_XID
, lport
->lro_xid
,
779 printk(KERN_ERR
"fcoe_em_config: failed to allocate "
780 "em for offload exches on interface:%s\n",
787 * Exclude offload EM xid range from next EM xid range.
789 min_xid
+= lport
->lro_xid
+ 1;
792 if (!fc_exch_mgr_alloc(lport
, FC_CLASS_3
, min_xid
, max_xid
, NULL
)) {
793 printk(KERN_ERR
"fcoe_em_config: failed to "
794 "allocate em on interface %s\n", fcoe
->netdev
->name
);
802 * fcoe_if_destroy() - Tear down a SW FCoE instance
803 * @lport: The local port to be destroyed
805 static void fcoe_if_destroy(struct fc_lport
*lport
)
807 struct fcoe_port
*port
= lport_priv(lport
);
808 struct fcoe_interface
*fcoe
= port
->fcoe
;
809 struct net_device
*netdev
= fcoe
->netdev
;
811 FCOE_NETDEV_DBG(netdev
, "Destroying interface\n");
813 /* Logout of the fabric */
814 fc_fabric_logoff(lport
);
816 /* Cleanup the fc_lport */
817 fc_lport_destroy(lport
);
818 fc_fcp_destroy(lport
);
820 /* Stop the transmit retry timer */
821 del_timer_sync(&port
->timer
);
823 /* Free existing transmit skbs */
824 fcoe_clean_pending_queue(lport
);
827 if (!is_zero_ether_addr(port
->data_src_addr
))
828 dev_unicast_delete(netdev
, port
->data_src_addr
);
831 /* receives may not be stopped until after this */
832 fcoe_interface_put(fcoe
);
834 /* Free queued packets for the per-CPU receive threads */
835 fcoe_percpu_clean(lport
);
837 /* Detach from the scsi-ml */
838 fc_remove_host(lport
->host
);
839 scsi_remove_host(lport
->host
);
841 /* There are no more rports or I/O, free the EM */
842 fc_exch_mgr_free(lport
);
844 /* Free memory used by statistical counters */
845 fc_lport_free_stats(lport
);
847 /* Release the Scsi_Host */
848 scsi_host_put(lport
->host
);
852 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
853 * @lport: The local port to setup DDP for
854 * @xid: The exchange ID for this DDP transfer
855 * @sgl: The scatterlist describing this transfer
856 * @sgc: The number of sg items
858 * Returns: 0 if the DDP context was not configured
860 static int fcoe_ddp_setup(struct fc_lport
*lport
, u16 xid
,
861 struct scatterlist
*sgl
, unsigned int sgc
)
863 struct net_device
*netdev
= fcoe_netdev(lport
);
865 if (netdev
->netdev_ops
->ndo_fcoe_ddp_setup
)
866 return netdev
->netdev_ops
->ndo_fcoe_ddp_setup(netdev
,
874 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
875 * @lport: The local port to complete DDP on
876 * @xid: The exchange ID for this DDP transfer
878 * Returns: the length of data that have been completed by DDP
880 static int fcoe_ddp_done(struct fc_lport
*lport
, u16 xid
)
882 struct net_device
*netdev
= fcoe_netdev(lport
);
884 if (netdev
->netdev_ops
->ndo_fcoe_ddp_done
)
885 return netdev
->netdev_ops
->ndo_fcoe_ddp_done(netdev
, xid
);
890 * fcoe_if_create() - Create a FCoE instance on an interface
891 * @fcoe: The FCoE interface to create a local port on
892 * @parent: The device pointer to be the parent in sysfs for the SCSI host
893 * @npiv: Indicates if the port is a vport or not
895 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
897 * Returns: The allocated fc_lport or an error pointer
899 static struct fc_lport
*fcoe_if_create(struct fcoe_interface
*fcoe
,
900 struct device
*parent
, int npiv
)
902 struct net_device
*netdev
= fcoe
->netdev
;
903 struct fc_lport
*lport
= NULL
;
904 struct fcoe_port
*port
;
907 * parent is only a vport if npiv is 1,
908 * but we'll only use vport in that case so go ahead and set it
910 struct fc_vport
*vport
= dev_to_vport(parent
);
912 FCOE_NETDEV_DBG(netdev
, "Create Interface\n");
915 lport
= libfc_host_alloc(&fcoe_shost_template
,
916 sizeof(struct fcoe_port
));
918 lport
= libfc_vport_create(vport
,
919 sizeof(struct fcoe_port
));
922 FCOE_NETDEV_DBG(netdev
, "Could not allocate host structure\n");
926 port
= lport_priv(lport
);
929 INIT_WORK(&port
->destroy_work
, fcoe_destroy_work
);
931 /* configure a fc_lport including the exchange manager */
932 rc
= fcoe_lport_config(lport
);
934 FCOE_NETDEV_DBG(netdev
, "Could not configure lport for the "
940 FCOE_NETDEV_DBG(netdev
, "Setting vport names, "
941 "%16.16llx %16.16llx\n",
942 vport
->node_name
, vport
->port_name
);
943 fc_set_wwnn(lport
, vport
->node_name
);
944 fc_set_wwpn(lport
, vport
->port_name
);
947 /* configure lport network properties */
948 rc
= fcoe_netdev_config(lport
, netdev
);
950 FCOE_NETDEV_DBG(netdev
, "Could not configure netdev for the "
955 /* configure lport scsi host properties */
956 rc
= fcoe_shost_config(lport
, parent
);
958 FCOE_NETDEV_DBG(netdev
, "Could not configure shost for the "
963 /* Initialize the library */
964 rc
= fcoe_libfc_config(lport
, &fcoe_libfc_fcn_templ
);
966 FCOE_NETDEV_DBG(netdev
, "Could not configure libfc for the "
973 * fcoe_em_alloc() and fcoe_hostlist_add() both
974 * need to be atomic with respect to other changes to the
975 * hostlist since fcoe_em_alloc() looks for an existing EM
976 * instance on host list updated by fcoe_hostlist_add().
978 * This is currently handled through the fcoe_config_mutex
982 /* lport exch manager allocation */
983 rc
= fcoe_em_config(lport
);
985 FCOE_NETDEV_DBG(netdev
, "Could not configure the EM "
986 "for the interface\n");
991 fcoe_interface_get(fcoe
);
995 fc_exch_mgr_free(lport
);
997 scsi_host_put(lport
->host
);
1003 * fcoe_if_init() - Initialization routine for fcoe.ko
1005 * Attaches the SW FCoE transport to the FC transport
1007 * Returns: 0 on success
1009 static int __init
fcoe_if_init(void)
1011 /* attach to scsi transport */
1012 fcoe_transport_template
= fc_attach_transport(&fcoe_transport_function
);
1013 fcoe_vport_transport_template
=
1014 fc_attach_transport(&fcoe_vport_transport_function
);
1016 if (!fcoe_transport_template
) {
1017 printk(KERN_ERR
"fcoe: Failed to attach to the FC transport\n");
1025 * fcoe_if_exit() - Tear down fcoe.ko
1027 * Detaches the SW FCoE transport from the FC transport
1029 * Returns: 0 on success
1031 int __exit
fcoe_if_exit(void)
1033 fc_release_transport(fcoe_transport_template
);
1034 fc_release_transport(fcoe_vport_transport_template
);
1035 fcoe_transport_template
= NULL
;
1036 fcoe_vport_transport_template
= NULL
;
1041 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1042 * @cpu: The CPU index of the CPU to create a receive thread for
1044 static void fcoe_percpu_thread_create(unsigned int cpu
)
1046 struct fcoe_percpu_s
*p
;
1047 struct task_struct
*thread
;
1049 p
= &per_cpu(fcoe_percpu
, cpu
);
1051 thread
= kthread_create(fcoe_percpu_receive_thread
,
1052 (void *)p
, "fcoethread/%d", cpu
);
1054 if (likely(!IS_ERR(thread
))) {
1055 kthread_bind(thread
, cpu
);
1056 wake_up_process(thread
);
1058 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1060 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1065 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1066 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1068 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1069 * current CPU's Rx thread. If the thread being destroyed is bound to
1070 * the CPU processing this context the skbs will be freed.
1072 static void fcoe_percpu_thread_destroy(unsigned int cpu
)
1074 struct fcoe_percpu_s
*p
;
1075 struct task_struct
*thread
;
1076 struct page
*crc_eof
;
1077 struct sk_buff
*skb
;
1079 struct fcoe_percpu_s
*p0
;
1080 unsigned targ_cpu
= get_cpu();
1081 #endif /* CONFIG_SMP */
1083 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu
);
1085 /* Prevent any new skbs from being queued for this CPU. */
1086 p
= &per_cpu(fcoe_percpu
, cpu
);
1087 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1090 crc_eof
= p
->crc_eof_page
;
1091 p
->crc_eof_page
= NULL
;
1092 p
->crc_eof_offset
= 0;
1093 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1097 * Don't bother moving the skb's if this context is running
1098 * on the same CPU that is having its thread destroyed. This
1099 * can easily happen when the module is removed.
1101 if (cpu
!= targ_cpu
) {
1102 p0
= &per_cpu(fcoe_percpu
, targ_cpu
);
1103 spin_lock_bh(&p0
->fcoe_rx_list
.lock
);
1105 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1108 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1109 __skb_queue_tail(&p0
->fcoe_rx_list
, skb
);
1110 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1113 * The targeted CPU is not initialized and cannot accept
1114 * new skbs. Unlock the targeted CPU and drop the skbs
1115 * on the CPU that is going offline.
1117 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1119 spin_unlock_bh(&p0
->fcoe_rx_list
.lock
);
1123 * This scenario occurs when the module is being removed
1124 * and all threads are being destroyed. skbs will continue
1125 * to be shifted from the CPU thread that is being removed
1126 * to the CPU thread associated with the CPU that is processing
1127 * the module removal. Once there is only one CPU Rx thread it
1128 * will reach this case and we will drop all skbs and later
1131 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1132 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1134 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1139 * This a non-SMP scenario where the singular Rx thread is
1140 * being removed. Free all skbs and stop the thread.
1142 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1143 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) != NULL
)
1145 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1149 kthread_stop(thread
);
1156 * fcoe_cpu_callback() - Handler for CPU hotplug events
1157 * @nfb: The callback data block
1158 * @action: The event triggering the callback
1159 * @hcpu: The index of the CPU that the event is for
1161 * This creates or destroys per-CPU data for fcoe
1163 * Returns NOTIFY_OK always.
1165 static int fcoe_cpu_callback(struct notifier_block
*nfb
,
1166 unsigned long action
, void *hcpu
)
1168 unsigned cpu
= (unsigned long)hcpu
;
1172 case CPU_ONLINE_FROZEN
:
1173 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu
);
1174 fcoe_percpu_thread_create(cpu
);
1177 case CPU_DEAD_FROZEN
:
1178 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu
);
1179 fcoe_percpu_thread_destroy(cpu
);
1188 * fcoe_rcv() - Receive packets from a net device
1189 * @skb: The received packet
1190 * @netdev: The net device that the packet was received on
1191 * @ptype: The packet type context
1192 * @olddev: The last device net device
1194 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1195 * FC frame and passes the frame to libfc.
1197 * Returns: 0 for success
1199 int fcoe_rcv(struct sk_buff
*skb
, struct net_device
*netdev
,
1200 struct packet_type
*ptype
, struct net_device
*olddev
)
1202 struct fc_lport
*lport
;
1203 struct fcoe_rcv_info
*fr
;
1204 struct fcoe_interface
*fcoe
;
1205 struct fc_frame_header
*fh
;
1206 struct fcoe_percpu_s
*fps
;
1209 fcoe
= container_of(ptype
, struct fcoe_interface
, fcoe_packet_type
);
1210 lport
= fcoe
->ctlr
.lp
;
1211 if (unlikely(!lport
)) {
1212 FCOE_NETDEV_DBG(netdev
, "Cannot find hba structure");
1215 if (!lport
->link_up
)
1218 FCOE_NETDEV_DBG(netdev
, "skb_info: len:%d data_len:%d head:%p "
1219 "data:%p tail:%p end:%p sum:%d dev:%s",
1220 skb
->len
, skb
->data_len
, skb
->head
, skb
->data
,
1221 skb_tail_pointer(skb
), skb_end_pointer(skb
),
1222 skb
->csum
, skb
->dev
? skb
->dev
->name
: "<NULL>");
1224 /* check for FCOE packet type */
1225 if (unlikely(eth_hdr(skb
)->h_proto
!= htons(ETH_P_FCOE
))) {
1226 FCOE_NETDEV_DBG(netdev
, "Wrong FC type frame");
1231 * Check for minimum frame length, and make sure required FCoE
1232 * and FC headers are pulled into the linear data area.
1234 if (unlikely((skb
->len
< FCOE_MIN_FRAME
) ||
1235 !pskb_may_pull(skb
, FCOE_HEADER_LEN
)))
1238 skb_set_transport_header(skb
, sizeof(struct fcoe_hdr
));
1239 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1241 fr
= fcoe_dev_from_skb(skb
);
1246 * In case the incoming frame's exchange is originated from
1247 * the initiator, then received frame's exchange id is ANDed
1248 * with fc_cpu_mask bits to get the same cpu on which exchange
1249 * was originated, otherwise just use the current cpu.
1251 if (ntoh24(fh
->fh_f_ctl
) & FC_FC_EX_CTX
)
1252 cpu
= ntohs(fh
->fh_ox_id
) & fc_cpu_mask
;
1254 cpu
= smp_processor_id();
1256 fps
= &per_cpu(fcoe_percpu
, cpu
);
1257 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1258 if (unlikely(!fps
->thread
)) {
1260 * The targeted CPU is not ready, let's target
1261 * the first CPU now. For non-SMP systems this
1262 * will check the same CPU twice.
1264 FCOE_NETDEV_DBG(netdev
, "CPU is online, but no receive thread "
1265 "ready for incoming skb- using first online "
1268 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1269 cpu
= cpumask_first(cpu_online_mask
);
1270 fps
= &per_cpu(fcoe_percpu
, cpu
);
1271 spin_lock_bh(&fps
->fcoe_rx_list
.lock
);
1273 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1279 * We now have a valid CPU that we're targeting for
1280 * this skb. We also have this receive thread locked,
1281 * so we're free to queue skbs into it's queue.
1284 /* If this is a SCSI-FCP frame, and this is already executing on the
1285 * correct CPU, and the queue for this CPU is empty, then go ahead
1286 * and process the frame directly in the softirq context.
1287 * This lets us process completions without context switching from the
1288 * NET_RX softirq, to our receive processing thread, and then back to
1289 * BLOCK softirq context.
1291 if (fh
->fh_type
== FC_TYPE_FCP
&&
1292 cpu
== smp_processor_id() &&
1293 skb_queue_empty(&fps
->fcoe_rx_list
)) {
1294 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1295 fcoe_recv_frame(skb
);
1297 __skb_queue_tail(&fps
->fcoe_rx_list
, skb
);
1298 if (fps
->fcoe_rx_list
.qlen
== 1)
1299 wake_up_process(fps
->thread
);
1300 spin_unlock_bh(&fps
->fcoe_rx_list
.lock
);
1305 per_cpu_ptr(lport
->dev_stats
, get_cpu())->ErrorFrames
++;
1313 * fcoe_start_io() - Start FCoE I/O
1314 * @skb: The packet to be transmitted
1316 * This routine is called from the net device to start transmitting
1319 * Returns: 0 for success
1321 static inline int fcoe_start_io(struct sk_buff
*skb
)
1323 struct sk_buff
*nskb
;
1326 nskb
= skb_clone(skb
, GFP_ATOMIC
);
1327 rc
= dev_queue_xmit(nskb
);
1335 * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1336 * @skb: The packet to be transmitted
1337 * @tlen: The total length of the trailer
1339 * This routine allocates a page for frame trailers. The page is re-used if
1340 * there is enough room left on it for the current trailer. If there isn't
1341 * enough buffer left a new page is allocated for the trailer. Reference to
1342 * the page from this function as well as the skbs using the page fragments
1343 * ensure that the page is freed at the appropriate time.
1345 * Returns: 0 for success
1347 static int fcoe_get_paged_crc_eof(struct sk_buff
*skb
, int tlen
)
1349 struct fcoe_percpu_s
*fps
;
1352 fps
= &get_cpu_var(fcoe_percpu
);
1353 page
= fps
->crc_eof_page
;
1355 page
= alloc_page(GFP_ATOMIC
);
1357 put_cpu_var(fcoe_percpu
);
1360 fps
->crc_eof_page
= page
;
1361 fps
->crc_eof_offset
= 0;
1365 skb_fill_page_desc(skb
, skb_shinfo(skb
)->nr_frags
, page
,
1366 fps
->crc_eof_offset
, tlen
);
1368 skb
->data_len
+= tlen
;
1369 skb
->truesize
+= tlen
;
1370 fps
->crc_eof_offset
+= sizeof(struct fcoe_crc_eof
);
1372 if (fps
->crc_eof_offset
>= PAGE_SIZE
) {
1373 fps
->crc_eof_page
= NULL
;
1374 fps
->crc_eof_offset
= 0;
1377 put_cpu_var(fcoe_percpu
);
1382 * fcoe_fc_crc() - Calculates the CRC for a given frame
1383 * @fp: The frame to be checksumed
1385 * This uses crc32() routine to calculate the CRC for a frame
1387 * Return: The 32 bit CRC value
1389 u32
fcoe_fc_crc(struct fc_frame
*fp
)
1391 struct sk_buff
*skb
= fp_skb(fp
);
1392 struct skb_frag_struct
*frag
;
1393 unsigned char *data
;
1394 unsigned long off
, len
, clen
;
1398 crc
= crc32(~0, skb
->data
, skb_headlen(skb
));
1400 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; i
++) {
1401 frag
= &skb_shinfo(skb
)->frags
[i
];
1402 off
= frag
->page_offset
;
1405 clen
= min(len
, PAGE_SIZE
- (off
& ~PAGE_MASK
));
1406 data
= kmap_atomic(frag
->page
+ (off
>> PAGE_SHIFT
),
1407 KM_SKB_DATA_SOFTIRQ
);
1408 crc
= crc32(crc
, data
+ (off
& ~PAGE_MASK
), clen
);
1409 kunmap_atomic(data
, KM_SKB_DATA_SOFTIRQ
);
1418 * fcoe_xmit() - Transmit a FCoE frame
1419 * @lport: The local port that the frame is to be transmitted for
1420 * @fp: The frame to be transmitted
1422 * Return: 0 for success
1424 int fcoe_xmit(struct fc_lport
*lport
, struct fc_frame
*fp
)
1429 struct fcoe_crc_eof
*cp
;
1430 struct sk_buff
*skb
;
1431 struct fcoe_dev_stats
*stats
;
1432 struct fc_frame_header
*fh
;
1433 unsigned int hlen
; /* header length implies the version */
1434 unsigned int tlen
; /* trailer length */
1435 unsigned int elen
; /* eth header, may include vlan */
1436 struct fcoe_port
*port
= lport_priv(lport
);
1437 struct fcoe_interface
*fcoe
= port
->fcoe
;
1439 struct fcoe_hdr
*hp
;
1441 WARN_ON((fr_len(fp
) % sizeof(u32
)) != 0);
1443 fh
= fc_frame_header_get(fp
);
1445 wlen
= skb
->len
/ FCOE_WORD_TO_BYTE
;
1447 if (!lport
->link_up
) {
1452 if (unlikely(fh
->fh_type
== FC_TYPE_ELS
) &&
1453 fcoe_ctlr_els_send(&fcoe
->ctlr
, lport
, skb
))
1459 elen
= sizeof(struct ethhdr
);
1460 hlen
= sizeof(struct fcoe_hdr
);
1461 tlen
= sizeof(struct fcoe_crc_eof
);
1462 wlen
= (skb
->len
- tlen
+ sizeof(crc
)) / FCOE_WORD_TO_BYTE
;
1465 if (likely(lport
->crc_offload
)) {
1466 skb
->ip_summed
= CHECKSUM_PARTIAL
;
1467 skb
->csum_start
= skb_headroom(skb
);
1468 skb
->csum_offset
= skb
->len
;
1471 skb
->ip_summed
= CHECKSUM_NONE
;
1472 crc
= fcoe_fc_crc(fp
);
1475 /* copy port crc and eof to the skb buff */
1476 if (skb_is_nonlinear(skb
)) {
1478 if (fcoe_get_paged_crc_eof(skb
, tlen
)) {
1482 frag
= &skb_shinfo(skb
)->frags
[skb_shinfo(skb
)->nr_frags
- 1];
1483 cp
= kmap_atomic(frag
->page
, KM_SKB_DATA_SOFTIRQ
)
1484 + frag
->page_offset
;
1486 cp
= (struct fcoe_crc_eof
*)skb_put(skb
, tlen
);
1489 memset(cp
, 0, sizeof(*cp
));
1491 cp
->fcoe_crc32
= cpu_to_le32(~crc
);
1493 if (skb_is_nonlinear(skb
)) {
1494 kunmap_atomic(cp
, KM_SKB_DATA_SOFTIRQ
);
1498 /* adjust skb network/transport offsets to match mac/fcoe/port */
1499 skb_push(skb
, elen
+ hlen
);
1500 skb_reset_mac_header(skb
);
1501 skb_reset_network_header(skb
);
1502 skb
->mac_len
= elen
;
1503 skb
->protocol
= htons(ETH_P_FCOE
);
1504 skb
->dev
= fcoe
->netdev
;
1506 /* fill up mac and fcoe headers */
1508 eh
->h_proto
= htons(ETH_P_FCOE
);
1509 if (fcoe
->ctlr
.map_dest
)
1510 fc_fcoe_set_mac(eh
->h_dest
, fh
->fh_d_id
);
1512 /* insert GW address */
1513 memcpy(eh
->h_dest
, fcoe
->ctlr
.dest_addr
, ETH_ALEN
);
1515 if (unlikely(fcoe
->ctlr
.flogi_oxid
!= FC_XID_UNKNOWN
))
1516 memcpy(eh
->h_source
, fcoe
->ctlr
.ctl_src_addr
, ETH_ALEN
);
1518 memcpy(eh
->h_source
, port
->data_src_addr
, ETH_ALEN
);
1520 hp
= (struct fcoe_hdr
*)(eh
+ 1);
1521 memset(hp
, 0, sizeof(*hp
));
1523 FC_FCOE_ENCAPS_VER(hp
, FC_FCOE_VER
);
1526 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1527 if (lport
->seq_offload
&& fr_max_payload(fp
)) {
1528 skb_shinfo(skb
)->gso_type
= SKB_GSO_FCOE
;
1529 skb_shinfo(skb
)->gso_size
= fr_max_payload(fp
);
1531 skb_shinfo(skb
)->gso_type
= 0;
1532 skb_shinfo(skb
)->gso_size
= 0;
1534 /* update tx stats: regardless if LLD fails */
1535 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1537 stats
->TxWords
+= wlen
;
1540 /* send down to lld */
1542 if (port
->fcoe_pending_queue
.qlen
)
1543 fcoe_check_wait_queue(lport
, skb
);
1544 else if (fcoe_start_io(skb
))
1545 fcoe_check_wait_queue(lport
, skb
);
1551 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1552 * @skb: The completed skb (argument required by destructor)
1554 static void fcoe_percpu_flush_done(struct sk_buff
*skb
)
1556 complete(&fcoe_flush_completion
);
1560 * fcoe_recv_frame() - process a single received frame
1561 * @skb: frame to process
1563 static void fcoe_recv_frame(struct sk_buff
*skb
)
1566 struct fc_lport
*lport
;
1567 struct fcoe_rcv_info
*fr
;
1568 struct fcoe_dev_stats
*stats
;
1569 struct fc_frame_header
*fh
;
1570 struct fcoe_crc_eof crc_eof
;
1571 struct fc_frame
*fp
;
1572 struct fcoe_port
*port
;
1573 struct fcoe_hdr
*hp
;
1575 fr
= fcoe_dev_from_skb(skb
);
1577 if (unlikely(!lport
)) {
1578 if (skb
->destructor
!= fcoe_percpu_flush_done
)
1579 FCOE_NETDEV_DBG(skb
->dev
, "NULL lport in skb");
1584 FCOE_NETDEV_DBG(skb
->dev
, "skb_info: len:%d data_len:%d "
1585 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1586 skb
->len
, skb
->data_len
,
1587 skb
->head
, skb
->data
, skb_tail_pointer(skb
),
1588 skb_end_pointer(skb
), skb
->csum
,
1589 skb
->dev
? skb
->dev
->name
: "<NULL>");
1591 port
= lport_priv(lport
);
1592 if (skb_is_nonlinear(skb
))
1593 skb_linearize(skb
); /* not ideal */
1596 * Frame length checks and setting up the header pointers
1597 * was done in fcoe_rcv already.
1599 hp
= (struct fcoe_hdr
*) skb_network_header(skb
);
1600 fh
= (struct fc_frame_header
*) skb_transport_header(skb
);
1602 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1603 if (unlikely(FC_FCOE_DECAPS_VER(hp
) != FC_FCOE_VER
)) {
1604 if (stats
->ErrorFrames
< 5)
1605 printk(KERN_WARNING
"fcoe: FCoE version "
1606 "mismatch: The frame has "
1607 "version %x, but the "
1608 "initiator supports version "
1609 "%x\n", FC_FCOE_DECAPS_VER(hp
),
1614 skb_pull(skb
, sizeof(struct fcoe_hdr
));
1615 fr_len
= skb
->len
- sizeof(struct fcoe_crc_eof
);
1618 stats
->RxWords
+= fr_len
/ FCOE_WORD_TO_BYTE
;
1620 fp
= (struct fc_frame
*)skb
;
1623 fr_sof(fp
) = hp
->fcoe_sof
;
1625 /* Copy out the CRC and EOF trailer for access */
1626 if (skb_copy_bits(skb
, fr_len
, &crc_eof
, sizeof(crc_eof
)))
1628 fr_eof(fp
) = crc_eof
.fcoe_eof
;
1629 fr_crc(fp
) = crc_eof
.fcoe_crc32
;
1630 if (pskb_trim(skb
, fr_len
))
1634 * We only check CRC if no offload is available and if it is
1635 * it's solicited data, in which case, the FCP layer would
1636 * check it during the copy.
1638 if (lport
->crc_offload
&&
1639 skb
->ip_summed
== CHECKSUM_UNNECESSARY
)
1640 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1642 fr_flags(fp
) |= FCPHF_CRC_UNCHECKED
;
1644 fh
= fc_frame_header_get(fp
);
1645 if ((fh
->fh_r_ctl
!= FC_RCTL_DD_SOL_DATA
||
1646 fh
->fh_type
!= FC_TYPE_FCP
) &&
1647 (fr_flags(fp
) & FCPHF_CRC_UNCHECKED
)) {
1648 if (le32_to_cpu(fr_crc(fp
)) !=
1649 ~crc32(~0, skb
->data
, fr_len
)) {
1650 if (stats
->InvalidCRCCount
< 5)
1651 printk(KERN_WARNING
"fcoe: dropping "
1652 "frame with CRC error\n");
1653 stats
->InvalidCRCCount
++;
1656 fr_flags(fp
) &= ~FCPHF_CRC_UNCHECKED
;
1659 fc_exch_recv(lport
, fp
);
1663 stats
->ErrorFrames
++;
1669 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1670 * @arg: The per-CPU context
1672 * Return: 0 for success
1674 int fcoe_percpu_receive_thread(void *arg
)
1676 struct fcoe_percpu_s
*p
= arg
;
1677 struct sk_buff
*skb
;
1679 set_user_nice(current
, -20);
1681 while (!kthread_should_stop()) {
1683 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1684 while ((skb
= __skb_dequeue(&p
->fcoe_rx_list
)) == NULL
) {
1685 set_current_state(TASK_INTERRUPTIBLE
);
1686 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1688 set_current_state(TASK_RUNNING
);
1689 if (kthread_should_stop())
1691 spin_lock_bh(&p
->fcoe_rx_list
.lock
);
1693 spin_unlock_bh(&p
->fcoe_rx_list
.lock
);
1694 fcoe_recv_frame(skb
);
1700 * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
1701 * @lport: The local port whose backlog is to be cleared
1703 * This empties the wait_queue, dequeues the head of the wait_queue queue
1704 * and calls fcoe_start_io() for each packet. If all skb have been
1705 * transmitted it returns the qlen. If an error occurs it restores
1706 * wait_queue (to try again later) and returns -1.
1708 * The wait_queue is used when the skb transmit fails. The failed skb
1709 * will go in the wait_queue which will be emptied by the timer function or
1710 * by the next skb transmit.
1712 static void fcoe_check_wait_queue(struct fc_lport
*lport
, struct sk_buff
*skb
)
1714 struct fcoe_port
*port
= lport_priv(lport
);
1717 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
1720 __skb_queue_tail(&port
->fcoe_pending_queue
, skb
);
1722 if (port
->fcoe_pending_queue_active
)
1724 port
->fcoe_pending_queue_active
= 1;
1726 while (port
->fcoe_pending_queue
.qlen
) {
1727 /* keep qlen > 0 until fcoe_start_io succeeds */
1728 port
->fcoe_pending_queue
.qlen
++;
1729 skb
= __skb_dequeue(&port
->fcoe_pending_queue
);
1731 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
1732 rc
= fcoe_start_io(skb
);
1733 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
1736 __skb_queue_head(&port
->fcoe_pending_queue
, skb
);
1737 /* undo temporary increment above */
1738 port
->fcoe_pending_queue
.qlen
--;
1741 /* undo temporary increment above */
1742 port
->fcoe_pending_queue
.qlen
--;
1745 if (port
->fcoe_pending_queue
.qlen
< FCOE_LOW_QUEUE_DEPTH
)
1747 if (port
->fcoe_pending_queue
.qlen
&& !timer_pending(&port
->timer
))
1748 mod_timer(&port
->timer
, jiffies
+ 2);
1749 port
->fcoe_pending_queue_active
= 0;
1751 if (port
->fcoe_pending_queue
.qlen
> FCOE_MAX_QUEUE_DEPTH
)
1753 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
1758 * fcoe_dev_setup() - Setup the link change notification interface
1760 static void fcoe_dev_setup(void)
1762 register_netdevice_notifier(&fcoe_notifier
);
1766 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1768 static void fcoe_dev_cleanup(void)
1770 unregister_netdevice_notifier(&fcoe_notifier
);
1774 * fcoe_device_notification() - Handler for net device events
1775 * @notifier: The context of the notification
1776 * @event: The type of event
1777 * @ptr: The net device that the event was on
1779 * This function is called by the Ethernet driver in case of link change event.
1781 * Returns: 0 for success
1783 static int fcoe_device_notification(struct notifier_block
*notifier
,
1784 ulong event
, void *ptr
)
1786 struct fc_lport
*lport
= NULL
;
1787 struct net_device
*netdev
= ptr
;
1788 struct fcoe_interface
*fcoe
;
1789 struct fcoe_port
*port
;
1790 struct fcoe_dev_stats
*stats
;
1791 u32 link_possible
= 1;
1795 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
1796 if (fcoe
->netdev
== netdev
) {
1797 lport
= fcoe
->ctlr
.lp
;
1808 case NETDEV_GOING_DOWN
:
1814 case NETDEV_CHANGEMTU
:
1815 if (netdev
->features
& NETIF_F_FCOE_MTU
)
1817 mfs
= netdev
->mtu
- (sizeof(struct fcoe_hdr
) +
1818 sizeof(struct fcoe_crc_eof
));
1819 if (mfs
>= FC_MIN_MAX_FRAME
)
1820 fc_set_mfs(lport
, mfs
);
1822 case NETDEV_REGISTER
:
1824 case NETDEV_UNREGISTER
:
1825 list_del(&fcoe
->list
);
1826 port
= lport_priv(fcoe
->ctlr
.lp
);
1827 fcoe_interface_cleanup(fcoe
);
1828 schedule_work(&port
->destroy_work
);
1832 FCOE_NETDEV_DBG(netdev
, "Unknown event %ld "
1833 "from netdev netlink\n", event
);
1836 fcoe_link_speed_update(lport
);
1838 if (link_possible
&& !fcoe_link_ok(lport
))
1839 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1840 else if (fcoe_ctlr_link_down(&fcoe
->ctlr
)) {
1841 stats
= per_cpu_ptr(lport
->dev_stats
, get_cpu());
1842 stats
->LinkFailureCount
++;
1844 fcoe_clean_pending_queue(lport
);
1851 * fcoe_if_to_netdev() - Parse a name buffer to get a net device
1852 * @buffer: The name of the net device
1854 * Returns: NULL or a ptr to net_device
1856 static struct net_device
*fcoe_if_to_netdev(const char *buffer
)
1859 char ifname
[IFNAMSIZ
+ 2];
1862 strlcpy(ifname
, buffer
, IFNAMSIZ
);
1863 cp
= ifname
+ strlen(ifname
);
1864 while (--cp
>= ifname
&& *cp
== '\n')
1866 return dev_get_by_name(&init_net
, ifname
);
1872 * fcoe_disable() - Disables a FCoE interface
1873 * @buffer: The name of the Ethernet interface to be disabled
1874 * @kp: The associated kernel parameter
1876 * Called from sysfs.
1878 * Returns: 0 for success
1880 static int fcoe_disable(const char *buffer
, struct kernel_param
*kp
)
1882 struct fcoe_interface
*fcoe
;
1883 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
) {
1899 netdev
= fcoe_if_to_netdev(buffer
);
1906 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1910 fc_fabric_logoff(fcoe
->ctlr
.lp
);
1911 fcoe_ctlr_link_down(&fcoe
->ctlr
);
1917 mutex_unlock(&fcoe_config_mutex
);
1922 * fcoe_enable() - Enables a FCoE interface
1923 * @buffer: The name of the Ethernet interface to be enabled
1924 * @kp: The associated kernel parameter
1926 * Called from sysfs.
1928 * Returns: 0 for success
1930 static int fcoe_enable(const char *buffer
, struct kernel_param
*kp
)
1932 struct fcoe_interface
*fcoe
;
1933 struct net_device
*netdev
;
1936 mutex_lock(&fcoe_config_mutex
);
1937 #ifdef CONFIG_FCOE_MODULE
1939 * Make sure the module has been initialized, and is not about to be
1940 * removed. Module paramter sysfs files are writable before the
1941 * module_init function is called and after module_exit.
1943 if (THIS_MODULE
->state
!= MODULE_STATE_LIVE
) {
1949 netdev
= fcoe_if_to_netdev(buffer
);
1956 fcoe
= fcoe_hostlist_lookup_port(netdev
);
1960 if (!fcoe_link_ok(fcoe
->ctlr
.lp
))
1961 fcoe_ctlr_link_up(&fcoe
->ctlr
);
1962 rc
= fc_fabric_login(fcoe
->ctlr
.lp
);
1968 mutex_unlock(&fcoe_config_mutex
);
1973 * fcoe_destroy() - Destroy a FCoE interface
1974 * @buffer: The name of the Ethernet interface to be destroyed
1975 * @kp: The associated kernel parameter
1977 * Called from sysfs.
1979 * Returns: 0 for success
1981 static int fcoe_destroy(const char *buffer
, struct kernel_param
*kp
)
1983 struct fcoe_interface
*fcoe
;
1984 struct net_device
*netdev
;
1987 mutex_lock(&fcoe_config_mutex
);
1988 #ifdef CONFIG_FCOE_MODULE
1990 * Make sure the module has been initialized, and is not about to be
1991 * removed. Module paramter sysfs files are writable before the
1992 * module_init function is called and after module_exit.
1994 if (THIS_MODULE
->state
!= MODULE_STATE_LIVE
) {
2000 netdev
= fcoe_if_to_netdev(buffer
);
2007 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2013 list_del(&fcoe
->list
);
2014 fcoe_interface_cleanup(fcoe
);
2016 fcoe_if_destroy(fcoe
->ctlr
.lp
);
2017 module_put(THIS_MODULE
);
2022 mutex_unlock(&fcoe_config_mutex
);
2027 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2028 * @work: Handle to the FCoE port to be destroyed
2030 static void fcoe_destroy_work(struct work_struct
*work
)
2032 struct fcoe_port
*port
;
2034 port
= container_of(work
, struct fcoe_port
, destroy_work
);
2035 mutex_lock(&fcoe_config_mutex
);
2036 fcoe_if_destroy(port
->lport
);
2037 mutex_unlock(&fcoe_config_mutex
);
2041 * fcoe_create() - Create a fcoe interface
2042 * @buffer: The name of the Ethernet interface to create on
2043 * @kp: The associated kernel param
2045 * Called from sysfs.
2047 * Returns: 0 for success
2049 static int fcoe_create(const char *buffer
, struct kernel_param
*kp
)
2052 struct fcoe_interface
*fcoe
;
2053 struct fc_lport
*lport
;
2054 struct net_device
*netdev
;
2056 mutex_lock(&fcoe_config_mutex
);
2057 #ifdef CONFIG_FCOE_MODULE
2059 * Make sure the module has been initialized, and is not about to be
2060 * removed. Module paramter sysfs files are writable before the
2061 * module_init function is called and after module_exit.
2063 if (THIS_MODULE
->state
!= MODULE_STATE_LIVE
) {
2069 if (!try_module_get(THIS_MODULE
)) {
2075 netdev
= fcoe_if_to_netdev(buffer
);
2081 /* look for existing lport */
2082 if (fcoe_hostlist_lookup(netdev
)) {
2087 fcoe
= fcoe_interface_create(netdev
);
2093 lport
= fcoe_if_create(fcoe
, &netdev
->dev
, 0);
2094 if (IS_ERR(lport
)) {
2095 printk(KERN_ERR
"fcoe: Failed to create interface (%s)\n",
2098 fcoe_interface_cleanup(fcoe
);
2102 /* Make this the "master" N_Port */
2103 fcoe
->ctlr
.lp
= lport
;
2105 /* add to lports list */
2106 fcoe_hostlist_add(lport
);
2108 /* start FIP Discovery and FLOGI */
2109 lport
->boot_time
= jiffies
;
2110 fc_fabric_login(lport
);
2111 if (!fcoe_link_ok(lport
))
2112 fcoe_ctlr_link_up(&fcoe
->ctlr
);
2115 * Release from init in fcoe_interface_create(), on success lport
2116 * should be holding a reference taken in fcoe_if_create().
2118 fcoe_interface_put(fcoe
);
2121 mutex_unlock(&fcoe_config_mutex
);
2125 fcoe_interface_put(fcoe
);
2130 module_put(THIS_MODULE
);
2132 mutex_unlock(&fcoe_config_mutex
);
2137 * fcoe_link_speed_update() - Update the supported and actual link speeds
2138 * @lport: The local port to update speeds for
2140 * Returns: 0 if the ethtool query was successful
2141 * -1 if the ethtool query failed
2143 int fcoe_link_speed_update(struct fc_lport
*lport
)
2145 struct fcoe_port
*port
= lport_priv(lport
);
2146 struct net_device
*netdev
= port
->fcoe
->netdev
;
2147 struct ethtool_cmd ecmd
= { ETHTOOL_GSET
};
2149 if (!dev_ethtool_get_settings(netdev
, &ecmd
)) {
2150 lport
->link_supported_speeds
&=
2151 ~(FC_PORTSPEED_1GBIT
| FC_PORTSPEED_10GBIT
);
2152 if (ecmd
.supported
& (SUPPORTED_1000baseT_Half
|
2153 SUPPORTED_1000baseT_Full
))
2154 lport
->link_supported_speeds
|= FC_PORTSPEED_1GBIT
;
2155 if (ecmd
.supported
& SUPPORTED_10000baseT_Full
)
2156 lport
->link_supported_speeds
|=
2157 FC_PORTSPEED_10GBIT
;
2158 if (ecmd
.speed
== SPEED_1000
)
2159 lport
->link_speed
= FC_PORTSPEED_1GBIT
;
2160 if (ecmd
.speed
== SPEED_10000
)
2161 lport
->link_speed
= FC_PORTSPEED_10GBIT
;
2169 * fcoe_link_ok() - Check if the link is OK for a local port
2170 * @lport: The local port to check link on
2172 * Returns: 0 if link is UP and OK, -1 if not
2175 int fcoe_link_ok(struct fc_lport
*lport
)
2177 struct fcoe_port
*port
= lport_priv(lport
);
2178 struct net_device
*netdev
= port
->fcoe
->netdev
;
2180 if (netif_oper_up(netdev
))
2186 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2187 * @lport: The local port whose skbs are to be cleared
2189 * Must be called with fcoe_create_mutex held to single-thread completion.
2191 * This flushes the pending skbs by adding a new skb to each queue and
2192 * waiting until they are all freed. This assures us that not only are
2193 * there no packets that will be handled by the lport, but also that any
2194 * threads already handling packet have returned.
2196 void fcoe_percpu_clean(struct fc_lport
*lport
)
2198 struct fcoe_percpu_s
*pp
;
2199 struct fcoe_rcv_info
*fr
;
2200 struct sk_buff_head
*list
;
2201 struct sk_buff
*skb
, *next
;
2202 struct sk_buff
*head
;
2205 for_each_possible_cpu(cpu
) {
2206 pp
= &per_cpu(fcoe_percpu
, cpu
);
2207 spin_lock_bh(&pp
->fcoe_rx_list
.lock
);
2208 list
= &pp
->fcoe_rx_list
;
2210 for (skb
= head
; skb
!= (struct sk_buff
*)list
;
2213 fr
= fcoe_dev_from_skb(skb
);
2214 if (fr
->fr_dev
== lport
) {
2215 __skb_unlink(skb
, list
);
2220 if (!pp
->thread
|| !cpu_online(cpu
)) {
2221 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2225 skb
= dev_alloc_skb(0);
2227 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2230 skb
->destructor
= fcoe_percpu_flush_done
;
2232 __skb_queue_tail(&pp
->fcoe_rx_list
, skb
);
2233 if (pp
->fcoe_rx_list
.qlen
== 1)
2234 wake_up_process(pp
->thread
);
2235 spin_unlock_bh(&pp
->fcoe_rx_list
.lock
);
2237 wait_for_completion(&fcoe_flush_completion
);
2242 * fcoe_clean_pending_queue() - Dequeue a skb and free it
2243 * @lport: The local port to dequeue a skb on
2245 void fcoe_clean_pending_queue(struct fc_lport
*lport
)
2247 struct fcoe_port
*port
= lport_priv(lport
);
2248 struct sk_buff
*skb
;
2250 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
2251 while ((skb
= __skb_dequeue(&port
->fcoe_pending_queue
)) != NULL
) {
2252 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
2254 spin_lock_bh(&port
->fcoe_pending_queue
.lock
);
2256 spin_unlock_bh(&port
->fcoe_pending_queue
.lock
);
2260 * fcoe_reset() - Reset a local port
2261 * @shost: The SCSI host associated with the local port to be reset
2263 * Returns: Always 0 (return value required by FC transport template)
2265 int fcoe_reset(struct Scsi_Host
*shost
)
2267 struct fc_lport
*lport
= shost_priv(shost
);
2268 fc_lport_reset(lport
);
2273 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2274 * @netdev: The net device used as a key
2276 * Locking: Must be called with the RNL mutex held.
2278 * Returns: NULL or the FCoE interface
2280 static struct fcoe_interface
*
2281 fcoe_hostlist_lookup_port(const struct net_device
*netdev
)
2283 struct fcoe_interface
*fcoe
;
2285 list_for_each_entry(fcoe
, &fcoe_hostlist
, list
) {
2286 if (fcoe
->netdev
== netdev
)
2293 * fcoe_hostlist_lookup() - Find the local port associated with a
2295 * @netdev: The netdevice used as a key
2297 * Locking: Must be called with the RTNL mutex held
2299 * Returns: NULL or the local port
2301 static struct fc_lport
*fcoe_hostlist_lookup(const struct net_device
*netdev
)
2303 struct fcoe_interface
*fcoe
;
2305 fcoe
= fcoe_hostlist_lookup_port(netdev
);
2306 return (fcoe
) ? fcoe
->ctlr
.lp
: NULL
;
2310 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2311 * port to the hostlist
2312 * @lport: The local port that identifies the FCoE interface to be added
2314 * Locking: must be called with the RTNL mutex held
2316 * Returns: 0 for success
2318 static int fcoe_hostlist_add(const struct fc_lport
*lport
)
2320 struct fcoe_interface
*fcoe
;
2321 struct fcoe_port
*port
;
2323 fcoe
= fcoe_hostlist_lookup_port(fcoe_netdev(lport
));
2325 port
= lport_priv(lport
);
2327 list_add_tail(&fcoe
->list
, &fcoe_hostlist
);
2333 * fcoe_init() - Initialize fcoe.ko
2335 * Returns: 0 on success, or a negative value on failure
2337 static int __init
fcoe_init(void)
2339 struct fcoe_percpu_s
*p
;
2343 mutex_lock(&fcoe_config_mutex
);
2345 for_each_possible_cpu(cpu
) {
2346 p
= &per_cpu(fcoe_percpu
, cpu
);
2347 skb_queue_head_init(&p
->fcoe_rx_list
);
2350 for_each_online_cpu(cpu
)
2351 fcoe_percpu_thread_create(cpu
);
2353 /* Initialize per CPU interrupt thread */
2354 rc
= register_hotcpu_notifier(&fcoe_cpu_notifier
);
2358 /* Setup link change notification */
2361 rc
= fcoe_if_init();
2365 mutex_unlock(&fcoe_config_mutex
);
2369 for_each_online_cpu(cpu
) {
2370 fcoe_percpu_thread_destroy(cpu
);
2372 mutex_unlock(&fcoe_config_mutex
);
2375 module_init(fcoe_init
);
2378 * fcoe_exit() - Clean up fcoe.ko
2380 * Returns: 0 on success or a negative value on failure
2382 static void __exit
fcoe_exit(void)
2384 struct fcoe_interface
*fcoe
, *tmp
;
2385 struct fcoe_port
*port
;
2388 mutex_lock(&fcoe_config_mutex
);
2392 /* releases the associated fcoe hosts */
2394 list_for_each_entry_safe(fcoe
, tmp
, &fcoe_hostlist
, list
) {
2395 list_del(&fcoe
->list
);
2396 port
= lport_priv(fcoe
->ctlr
.lp
);
2397 fcoe_interface_cleanup(fcoe
);
2398 schedule_work(&port
->destroy_work
);
2402 unregister_hotcpu_notifier(&fcoe_cpu_notifier
);
2404 for_each_online_cpu(cpu
)
2405 fcoe_percpu_thread_destroy(cpu
);
2407 mutex_unlock(&fcoe_config_mutex
);
2409 /* flush any asyncronous interface destroys,
2410 * this should happen after the netdev notifier is unregistered */
2411 flush_scheduled_work();
2412 /* That will flush out all the N_Ports on the hostlist, but now we
2413 * may have NPIV VN_Ports scheduled for destruction */
2414 flush_scheduled_work();
2416 /* detach from scsi transport
2417 * must happen after all destroys are done, therefor after the flush */
2420 module_exit(fcoe_exit
);
2423 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2424 * @seq: active sequence in the FLOGI or FDISC exchange
2425 * @fp: response frame, or error encoded in a pointer (timeout)
2426 * @arg: pointer the the fcoe_ctlr structure
2428 * This handles MAC address managment for FCoE, then passes control on to
2429 * the libfc FLOGI response handler.
2431 static void fcoe_flogi_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2433 struct fcoe_ctlr
*fip
= arg
;
2434 struct fc_exch
*exch
= fc_seq_exch(seq
);
2435 struct fc_lport
*lport
= exch
->lp
;
2441 mac
= fr_cb(fp
)->granted_mac
;
2442 if (is_zero_ether_addr(mac
)) {
2444 if (fcoe_ctlr_recv_flogi(fip
, lport
, fp
)) {
2449 fcoe_update_src_mac(lport
, mac
);
2451 fc_lport_flogi_resp(seq
, fp
, lport
);
2455 * fcoe_logo_resp() - FCoE specific LOGO response handler
2456 * @seq: active sequence in the LOGO exchange
2457 * @fp: response frame, or error encoded in a pointer (timeout)
2458 * @arg: pointer the the fcoe_ctlr structure
2460 * This handles MAC address managment for FCoE, then passes control on to
2461 * the libfc LOGO response handler.
2463 static void fcoe_logo_resp(struct fc_seq
*seq
, struct fc_frame
*fp
, void *arg
)
2465 struct fc_lport
*lport
= arg
;
2466 static u8 zero_mac
[ETH_ALEN
] = { 0 };
2469 fcoe_update_src_mac(lport
, zero_mac
);
2470 fc_lport_logo_resp(seq
, fp
, lport
);
2474 * fcoe_elsct_send - FCoE specific ELS handler
2476 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2477 * using FCoE specific response handlers and passing the FIP controller as
2478 * the argument (the lport is still available from the exchange).
2480 * Most of the work here is just handed off to the libfc routine.
2482 static struct fc_seq
*fcoe_elsct_send(struct fc_lport
*lport
, u32 did
,
2483 struct fc_frame
*fp
, unsigned int op
,
2484 void (*resp
)(struct fc_seq
*,
2487 void *arg
, u32 timeout
)
2489 struct fcoe_port
*port
= lport_priv(lport
);
2490 struct fcoe_interface
*fcoe
= port
->fcoe
;
2491 struct fcoe_ctlr
*fip
= &fcoe
->ctlr
;
2492 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
2497 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_flogi_resp
,
2500 /* only hook onto fabric logouts, not port logouts */
2501 if (ntoh24(fh
->fh_d_id
) != FC_FID_FLOGI
)
2503 return fc_elsct_send(lport
, did
, fp
, op
, fcoe_logo_resp
,
2506 return fc_elsct_send(lport
, did
, fp
, op
, resp
, arg
, timeout
);
2510 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2511 * @vport: fc_vport object to create a new fc_host for
2512 * @disabled: start the new fc_host in a disabled state by default?
2514 * Returns: 0 for success
2516 static int fcoe_vport_create(struct fc_vport
*vport
, bool disabled
)
2518 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2519 struct fc_lport
*n_port
= shost_priv(shost
);
2520 struct fcoe_port
*port
= lport_priv(n_port
);
2521 struct fcoe_interface
*fcoe
= port
->fcoe
;
2522 struct net_device
*netdev
= fcoe
->netdev
;
2523 struct fc_lport
*vn_port
;
2525 mutex_lock(&fcoe_config_mutex
);
2526 vn_port
= fcoe_if_create(fcoe
, &vport
->dev
, 1);
2527 mutex_unlock(&fcoe_config_mutex
);
2529 if (IS_ERR(vn_port
)) {
2530 printk(KERN_ERR
"fcoe: fcoe_vport_create(%s) failed\n",
2536 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2538 vn_port
->boot_time
= jiffies
;
2539 fc_fabric_login(vn_port
);
2540 fc_vport_setlink(vn_port
);
2546 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2547 * @vport: fc_vport object that is being destroyed
2549 * Returns: 0 for success
2551 static int fcoe_vport_destroy(struct fc_vport
*vport
)
2553 struct Scsi_Host
*shost
= vport_to_shost(vport
);
2554 struct fc_lport
*n_port
= shost_priv(shost
);
2555 struct fc_lport
*vn_port
= vport
->dd_data
;
2556 struct fcoe_port
*port
= lport_priv(vn_port
);
2558 mutex_lock(&n_port
->lp_mutex
);
2559 list_del(&vn_port
->list
);
2560 mutex_unlock(&n_port
->lp_mutex
);
2561 schedule_work(&port
->destroy_work
);
2566 * fcoe_vport_disable() - change vport state
2567 * @vport: vport to bring online/offline
2568 * @disable: should the vport be disabled?
2570 static int fcoe_vport_disable(struct fc_vport
*vport
, bool disable
)
2572 struct fc_lport
*lport
= vport
->dd_data
;
2575 fc_vport_set_state(vport
, FC_VPORT_DISABLED
);
2576 fc_fabric_logoff(lport
);
2578 lport
->boot_time
= jiffies
;
2579 fc_fabric_login(lport
);
2580 fc_vport_setlink(lport
);
2587 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2588 * @vport: fc_vport with a new symbolic name string
2590 * After generating a new symbolic name string, a new RSPN_ID request is
2591 * sent to the name server. There is no response handler, so if it fails
2592 * for some reason it will not be retried.
2594 static void fcoe_set_vport_symbolic_name(struct fc_vport
*vport
)
2596 struct fc_lport
*lport
= vport
->dd_data
;
2597 struct fc_frame
*fp
;
2600 snprintf(fc_host_symbolic_name(lport
->host
), FC_SYMBOLIC_NAME_SIZE
,
2601 "%s v%s over %s : %s", FCOE_NAME
, FCOE_VERSION
,
2602 fcoe_netdev(lport
)->name
, vport
->symbolic_name
);
2604 if (lport
->state
!= LPORT_ST_READY
)
2607 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
2608 fp
= fc_frame_alloc(lport
,
2609 sizeof(struct fc_ct_hdr
) +
2610 sizeof(struct fc_ns_rspn
) + len
);
2613 lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, FC_NS_RSPN_ID
,
2614 NULL
, NULL
, 3 * lport
->r_a_tov
);
2618 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2619 * @lport: the local port
2620 * @fc_lesb: the link error status block
2622 static void fcoe_get_lesb(struct fc_lport
*lport
,
2623 struct fc_els_lesb
*fc_lesb
)
2626 u32 lfc
, vlfc
, mdac
;
2627 struct fcoe_dev_stats
*devst
;
2628 struct fcoe_fc_els_lesb
*lesb
;
2629 struct net_device
*netdev
= fcoe_netdev(lport
);
2634 lesb
= (struct fcoe_fc_els_lesb
*)fc_lesb
;
2635 memset(lesb
, 0, sizeof(*lesb
));
2636 for_each_possible_cpu(cpu
) {
2637 devst
= per_cpu_ptr(lport
->dev_stats
, cpu
);
2638 lfc
+= devst
->LinkFailureCount
;
2639 vlfc
+= devst
->VLinkFailureCount
;
2640 mdac
+= devst
->MissDiscAdvCount
;
2642 lesb
->lesb_link_fail
= htonl(lfc
);
2643 lesb
->lesb_vlink_fail
= htonl(vlfc
);
2644 lesb
->lesb_miss_fka
= htonl(mdac
);
2645 lesb
->lesb_fcs_error
= htonl(dev_get_stats(netdev
)->rx_crc_errors
);
2649 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2650 * @lport: the local port
2651 * @port_id: the port ID
2652 * @fp: the received frame, if any, that caused the port_id to be set.
2654 * This routine handles the case where we received a FLOGI and are
2655 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2656 * so it can set the non-mapped mode and gateway address.
2658 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2660 static void fcoe_set_port_id(struct fc_lport
*lport
,
2661 u32 port_id
, struct fc_frame
*fp
)
2663 struct fcoe_port
*port
= lport_priv(lport
);
2664 struct fcoe_interface
*fcoe
= port
->fcoe
;
2666 if (fp
&& fc_frame_payload_op(fp
) == ELS_FLOGI
)
2667 fcoe_ctlr_recv_flogi(&fcoe
->ctlr
, lport
, fp
);