Linux 4.16.11
[linux/fpc-iii.git] / drivers / scsi / fcoe / fcoe.c
blobf46b312d04bc9c27c9d404c373222a8f3ff51cd5
1 /*
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
11 * more details.
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/spinlock.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/if_ether.h>
26 #include <linux/if_vlan.h>
27 #include <linux/crc32.h>
28 #include <linux/slab.h>
29 #include <linux/cpu.h>
30 #include <linux/fs.h>
31 #include <linux/sysfs.h>
32 #include <linux/ctype.h>
33 #include <linux/workqueue.h>
34 #include <net/dcbnl.h>
35 #include <net/dcbevent.h>
36 #include <scsi/scsi_tcq.h>
37 #include <scsi/scsicam.h>
38 #include <scsi/scsi_transport.h>
39 #include <scsi/scsi_transport_fc.h>
40 #include <net/rtnetlink.h>
42 #include <scsi/fc/fc_encaps.h>
43 #include <scsi/fc/fc_fip.h>
44 #include <scsi/fc/fc_fcoe.h>
46 #include <scsi/libfc.h>
47 #include <scsi/fc_frame.h>
48 #include <scsi/libfcoe.h>
50 #include "fcoe.h"
52 MODULE_AUTHOR("Open-FCoE.org");
53 MODULE_DESCRIPTION("FCoE");
54 MODULE_LICENSE("GPL v2");
56 /* Performance tuning parameters for fcoe */
57 static unsigned int fcoe_ddp_min = 4096;
58 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
59 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
60 "Direct Data Placement (DDP).");
62 unsigned int fcoe_debug_logging;
63 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
64 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
66 static unsigned int fcoe_e_d_tov = 2 * 1000;
67 module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR);
68 MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000");
70 static unsigned int fcoe_r_a_tov = 2 * 2 * 1000;
71 module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR);
72 MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000");
74 static DEFINE_MUTEX(fcoe_config_mutex);
76 static struct workqueue_struct *fcoe_wq;
78 /* fcoe host list */
79 /* must only by accessed under the RTNL mutex */
80 static LIST_HEAD(fcoe_hostlist);
81 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
83 /* Function Prototypes */
84 static int fcoe_reset(struct Scsi_Host *);
85 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
86 static int fcoe_rcv(struct sk_buff *, struct net_device *,
87 struct packet_type *, struct net_device *);
88 static void fcoe_percpu_clean(struct fc_lport *);
89 static int fcoe_link_ok(struct fc_lport *);
91 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
92 static int fcoe_hostlist_add(const struct fc_lport *);
93 static void fcoe_hostlist_del(const struct fc_lport *);
95 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
96 static void fcoe_dev_setup(void);
97 static void fcoe_dev_cleanup(void);
98 static struct fcoe_interface
99 *fcoe_hostlist_lookup_port(const struct net_device *);
101 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
102 struct packet_type *, struct net_device *);
103 static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *,
104 struct packet_type *, struct net_device *);
106 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
107 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
108 static u8 *fcoe_get_src_mac(struct fc_lport *);
109 static void fcoe_destroy_work(struct work_struct *);
111 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
112 unsigned int);
113 static int fcoe_ddp_done(struct fc_lport *, u16);
114 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
115 unsigned int);
116 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
117 ulong event, void *ptr);
119 static bool fcoe_match(struct net_device *netdev);
120 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode);
121 static int fcoe_destroy(struct net_device *netdev);
122 static int fcoe_enable(struct net_device *netdev);
123 static int fcoe_disable(struct net_device *netdev);
125 /* fcoe_syfs control interface handlers */
126 static int fcoe_ctlr_alloc(struct net_device *netdev);
127 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
128 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev);
130 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
131 u32 did, struct fc_frame *,
132 unsigned int op,
133 void (*resp)(struct fc_seq *,
134 struct fc_frame *,
135 void *),
136 void *, u32 timeout);
137 static void fcoe_recv_frame(struct sk_buff *skb);
139 /* notification function for packets from net device */
140 static struct notifier_block fcoe_notifier = {
141 .notifier_call = fcoe_device_notification,
144 /* notification function for DCB events */
145 static struct notifier_block dcb_notifier = {
146 .notifier_call = fcoe_dcb_app_notification,
149 static struct scsi_transport_template *fcoe_nport_scsi_transport;
150 static struct scsi_transport_template *fcoe_vport_scsi_transport;
152 static int fcoe_vport_destroy(struct fc_vport *);
153 static int fcoe_vport_create(struct fc_vport *, bool disabled);
154 static int fcoe_vport_disable(struct fc_vport *, bool disable);
155 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
156 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
157 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
158 static void fcoe_vport_remove(struct fc_lport *);
160 static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
161 .set_fcoe_ctlr_mode = fcoe_ctlr_mode,
162 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
163 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
164 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
165 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
166 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
167 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
168 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
170 .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
171 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
174 static struct libfc_function_template fcoe_libfc_fcn_templ = {
175 .frame_send = fcoe_xmit,
176 .ddp_setup = fcoe_ddp_setup,
177 .ddp_done = fcoe_ddp_done,
178 .ddp_target = fcoe_ddp_target,
179 .elsct_send = fcoe_elsct_send,
180 .get_lesb = fcoe_get_lesb,
181 .lport_set_port_id = fcoe_set_port_id,
184 static struct fc_function_template fcoe_nport_fc_functions = {
185 .show_host_node_name = 1,
186 .show_host_port_name = 1,
187 .show_host_supported_classes = 1,
188 .show_host_supported_fc4s = 1,
189 .show_host_active_fc4s = 1,
190 .show_host_maxframe_size = 1,
191 .show_host_serial_number = 1,
192 .show_host_manufacturer = 1,
193 .show_host_model = 1,
194 .show_host_model_description = 1,
195 .show_host_hardware_version = 1,
196 .show_host_driver_version = 1,
197 .show_host_firmware_version = 1,
198 .show_host_optionrom_version = 1,
200 .show_host_port_id = 1,
201 .show_host_supported_speeds = 1,
202 .get_host_speed = fc_get_host_speed,
203 .show_host_speed = 1,
204 .show_host_port_type = 1,
205 .get_host_port_state = fc_get_host_port_state,
206 .show_host_port_state = 1,
207 .show_host_symbolic_name = 1,
209 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
210 .show_rport_maxframe_size = 1,
211 .show_rport_supported_classes = 1,
213 .show_host_fabric_name = 1,
214 .show_starget_node_name = 1,
215 .show_starget_port_name = 1,
216 .show_starget_port_id = 1,
217 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
218 .show_rport_dev_loss_tmo = 1,
219 .get_fc_host_stats = fc_get_host_stats,
220 .issue_fc_host_lip = fcoe_reset,
222 .terminate_rport_io = fc_rport_terminate_io,
224 .vport_create = fcoe_vport_create,
225 .vport_delete = fcoe_vport_destroy,
226 .vport_disable = fcoe_vport_disable,
227 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
229 .bsg_request = fc_lport_bsg_request,
232 static struct fc_function_template fcoe_vport_fc_functions = {
233 .show_host_node_name = 1,
234 .show_host_port_name = 1,
235 .show_host_supported_classes = 1,
236 .show_host_supported_fc4s = 1,
237 .show_host_active_fc4s = 1,
238 .show_host_maxframe_size = 1,
239 .show_host_serial_number = 1,
240 .show_host_manufacturer = 1,
241 .show_host_model = 1,
242 .show_host_model_description = 1,
243 .show_host_hardware_version = 1,
244 .show_host_driver_version = 1,
245 .show_host_firmware_version = 1,
246 .show_host_optionrom_version = 1,
248 .show_host_port_id = 1,
249 .show_host_supported_speeds = 1,
250 .get_host_speed = fc_get_host_speed,
251 .show_host_speed = 1,
252 .show_host_port_type = 1,
253 .get_host_port_state = fc_get_host_port_state,
254 .show_host_port_state = 1,
255 .show_host_symbolic_name = 1,
257 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
258 .show_rport_maxframe_size = 1,
259 .show_rport_supported_classes = 1,
261 .show_host_fabric_name = 1,
262 .show_starget_node_name = 1,
263 .show_starget_port_name = 1,
264 .show_starget_port_id = 1,
265 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
266 .show_rport_dev_loss_tmo = 1,
267 .get_fc_host_stats = fc_get_host_stats,
268 .issue_fc_host_lip = fcoe_reset,
270 .terminate_rport_io = fc_rport_terminate_io,
272 .bsg_request = fc_lport_bsg_request,
275 static struct scsi_host_template fcoe_shost_template = {
276 .module = THIS_MODULE,
277 .name = "FCoE Driver",
278 .proc_name = FCOE_NAME,
279 .queuecommand = fc_queuecommand,
280 .eh_timed_out = fc_eh_timed_out,
281 .eh_abort_handler = fc_eh_abort,
282 .eh_device_reset_handler = fc_eh_device_reset,
283 .eh_host_reset_handler = fc_eh_host_reset,
284 .slave_alloc = fc_slave_alloc,
285 .change_queue_depth = scsi_change_queue_depth,
286 .this_id = -1,
287 .cmd_per_lun = 3,
288 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
289 .use_clustering = ENABLE_CLUSTERING,
290 .sg_tablesize = SG_ALL,
291 .max_sectors = 0xffff,
292 .track_queue_depth = 1,
296 * fcoe_interface_setup() - Setup a FCoE interface
297 * @fcoe: The new FCoE interface
298 * @netdev: The net device that the fcoe interface is on
300 * Returns : 0 for success
301 * Locking: must be called with the RTNL mutex held
303 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
304 struct net_device *netdev)
306 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
307 struct netdev_hw_addr *ha;
308 struct net_device *real_dev;
309 u8 flogi_maddr[ETH_ALEN];
310 const struct net_device_ops *ops;
312 fcoe->netdev = netdev;
314 /* Let LLD initialize for FCoE */
315 ops = netdev->netdev_ops;
316 if (ops->ndo_fcoe_enable) {
317 if (ops->ndo_fcoe_enable(netdev))
318 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
319 " specific feature for LLD.\n");
322 /* Do not support for bonding device */
323 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
324 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
325 return -EOPNOTSUPP;
328 /* look for SAN MAC address, if multiple SAN MACs exist, only
329 * use the first one for SPMA */
330 real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev;
331 fcoe->realdev = real_dev;
332 rcu_read_lock();
333 for_each_dev_addr(real_dev, ha) {
334 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
335 (is_valid_ether_addr(ha->addr))) {
336 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
337 fip->spma = 1;
338 break;
341 rcu_read_unlock();
343 /* setup Source Mac Address */
344 if (!fip->spma)
345 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
348 * Add FCoE MAC address as second unicast MAC address
349 * or enter promiscuous mode if not capable of listening
350 * for multiple unicast MACs.
352 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
353 dev_uc_add(netdev, flogi_maddr);
354 if (fip->spma)
355 dev_uc_add(netdev, fip->ctl_src_addr);
356 if (fip->mode == FIP_MODE_VN2VN) {
357 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
358 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
359 } else
360 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
363 * setup the receive function from ethernet driver
364 * on the ethertype for the given device
366 fcoe->fcoe_packet_type.func = fcoe_rcv;
367 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);
368 fcoe->fcoe_packet_type.dev = netdev;
369 dev_add_pack(&fcoe->fcoe_packet_type);
371 fcoe->fip_packet_type.func = fcoe_fip_recv;
372 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
373 fcoe->fip_packet_type.dev = netdev;
374 dev_add_pack(&fcoe->fip_packet_type);
376 if (netdev != real_dev) {
377 fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv;
378 fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP);
379 fcoe->fip_vlan_packet_type.dev = real_dev;
380 dev_add_pack(&fcoe->fip_vlan_packet_type);
382 return 0;
386 * fcoe_interface_create() - Create a FCoE interface on a net device
387 * @netdev: The net device to create the FCoE interface on
388 * @fip_mode: The mode to use for FIP
390 * Returns: pointer to a struct fcoe_interface or NULL on error
392 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
393 enum fip_state fip_mode)
395 struct fcoe_ctlr_device *ctlr_dev;
396 struct fcoe_ctlr *ctlr;
397 struct fcoe_interface *fcoe;
398 int size;
399 int err;
401 if (!try_module_get(THIS_MODULE)) {
402 FCOE_NETDEV_DBG(netdev,
403 "Could not get a reference to the module\n");
404 fcoe = ERR_PTR(-EBUSY);
405 goto out;
408 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
409 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
410 size);
411 if (!ctlr_dev) {
412 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
413 fcoe = ERR_PTR(-ENOMEM);
414 goto out_putmod;
417 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
418 ctlr->cdev = ctlr_dev;
419 fcoe = fcoe_ctlr_priv(ctlr);
421 dev_hold(netdev);
424 * Initialize FIP.
426 fcoe_ctlr_init(ctlr, fip_mode);
427 ctlr->send = fcoe_fip_send;
428 ctlr->update_mac = fcoe_update_src_mac;
429 ctlr->get_src_addr = fcoe_get_src_mac;
431 err = fcoe_interface_setup(fcoe, netdev);
432 if (err) {
433 fcoe_ctlr_destroy(ctlr);
434 fcoe_ctlr_device_delete(ctlr_dev);
435 dev_put(netdev);
436 fcoe = ERR_PTR(err);
437 goto out_putmod;
440 goto out;
442 out_putmod:
443 module_put(THIS_MODULE);
444 out:
445 return fcoe;
449 * fcoe_interface_remove() - remove FCoE interface from netdev
450 * @fcoe: The FCoE interface to be cleaned up
452 * Caller must be holding the RTNL mutex
454 static void fcoe_interface_remove(struct fcoe_interface *fcoe)
456 struct net_device *netdev = fcoe->netdev;
457 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
458 u8 flogi_maddr[ETH_ALEN];
459 const struct net_device_ops *ops;
462 * Don't listen for Ethernet packets anymore.
463 * synchronize_net() ensures that the packet handlers are not running
464 * on another CPU. dev_remove_pack() would do that, this calls the
465 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
467 __dev_remove_pack(&fcoe->fcoe_packet_type);
468 __dev_remove_pack(&fcoe->fip_packet_type);
469 if (netdev != fcoe->realdev)
470 __dev_remove_pack(&fcoe->fip_vlan_packet_type);
471 synchronize_net();
473 /* Delete secondary MAC addresses */
474 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
475 dev_uc_del(netdev, flogi_maddr);
476 if (fip->spma)
477 dev_uc_del(netdev, fip->ctl_src_addr);
478 if (fip->mode == FIP_MODE_VN2VN) {
479 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
480 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
481 } else
482 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
484 /* Tell the LLD we are done w/ FCoE */
485 ops = netdev->netdev_ops;
486 if (ops->ndo_fcoe_disable) {
487 if (ops->ndo_fcoe_disable(netdev))
488 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
489 " specific feature for LLD.\n");
491 fcoe->removed = 1;
496 * fcoe_interface_cleanup() - Clean up a FCoE interface
497 * @fcoe: The FCoE interface to be cleaned up
499 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
501 struct net_device *netdev = fcoe->netdev;
502 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
504 /* Release the self-reference taken during fcoe_interface_create() */
505 /* tear-down the FCoE controller */
506 fcoe_ctlr_destroy(fip);
507 scsi_host_put(fip->lp->host);
508 dev_put(netdev);
509 module_put(THIS_MODULE);
513 * fcoe_fip_recv() - Handler for received FIP frames
514 * @skb: The receive skb
515 * @netdev: The associated net device
516 * @ptype: The packet_type structure which was used to register this handler
517 * @orig_dev: The original net_device the skb was received on.
518 * (in case dev is a bond)
520 * Returns: 0 for success
522 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
523 struct packet_type *ptype,
524 struct net_device *orig_dev)
526 struct fcoe_interface *fcoe;
527 struct fcoe_ctlr *ctlr;
529 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
530 ctlr = fcoe_to_ctlr(fcoe);
531 fcoe_ctlr_recv(ctlr, skb);
532 return 0;
536 * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames
537 * @skb: The receive skb
538 * @netdev: The associated net device
539 * @ptype: The packet_type structure which was used to register this handler
540 * @orig_dev: The original net_device the skb was received on.
541 * (in case dev is a bond)
543 * Returns: 0 for success
545 static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev,
546 struct packet_type *ptype,
547 struct net_device *orig_dev)
549 struct fcoe_interface *fcoe;
550 struct fcoe_ctlr *ctlr;
552 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type);
553 ctlr = fcoe_to_ctlr(fcoe);
554 fcoe_ctlr_recv(ctlr, skb);
555 return 0;
559 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
560 * @port: The FCoE port
561 * @skb: The FIP/FCoE packet to be sent
563 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
565 if (port->fcoe_pending_queue.qlen)
566 fcoe_check_wait_queue(port->lport, skb);
567 else if (fcoe_start_io(skb))
568 fcoe_check_wait_queue(port->lport, skb);
572 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
573 * @fip: The FCoE controller
574 * @skb: The FIP packet to be sent
576 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
578 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip);
579 struct fip_frame {
580 struct ethhdr eth;
581 struct fip_header fip;
582 } __packed *frame;
585 * Use default VLAN for FIP VLAN discovery protocol
587 frame = (struct fip_frame *)skb->data;
588 if (ntohs(frame->eth.h_proto) == ETH_P_FIP &&
589 ntohs(frame->fip.fip_op) == FIP_OP_VLAN &&
590 fcoe->realdev != fcoe->netdev)
591 skb->dev = fcoe->realdev;
592 else
593 skb->dev = fcoe->netdev;
594 fcoe_port_send(lport_priv(fip->lp), skb);
598 * fcoe_update_src_mac() - Update the Ethernet MAC filters
599 * @lport: The local port to update the source MAC on
600 * @addr: Unicast MAC address to add
602 * Remove any previously-set unicast MAC filter.
603 * Add secondary FCoE MAC address filter for our OUI.
605 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
607 struct fcoe_port *port = lport_priv(lport);
608 struct fcoe_interface *fcoe = port->priv;
610 if (!is_zero_ether_addr(port->data_src_addr))
611 dev_uc_del(fcoe->netdev, port->data_src_addr);
612 if (!is_zero_ether_addr(addr))
613 dev_uc_add(fcoe->netdev, addr);
614 memcpy(port->data_src_addr, addr, ETH_ALEN);
618 * fcoe_get_src_mac() - return the Ethernet source address for an lport
619 * @lport: libfc lport
621 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
623 struct fcoe_port *port = lport_priv(lport);
625 return port->data_src_addr;
629 * fcoe_lport_config() - Set up a local port
630 * @lport: The local port to be setup
632 * Returns: 0 for success
634 static int fcoe_lport_config(struct fc_lport *lport)
636 lport->link_up = 0;
637 lport->qfull = 0;
638 lport->max_retry_count = 3;
639 lport->max_rport_retry_count = 3;
640 lport->e_d_tov = fcoe_e_d_tov;
641 lport->r_a_tov = fcoe_r_a_tov;
642 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
643 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
644 lport->does_npiv = 1;
646 fc_lport_init_stats(lport);
648 /* lport fc_lport related configuration */
649 fc_lport_config(lport);
651 /* offload related configuration */
652 lport->crc_offload = 0;
653 lport->seq_offload = 0;
654 lport->lro_enabled = 0;
655 lport->lro_xid = 0;
656 lport->lso_max = 0;
658 return 0;
662 * fcoe_netdev_features_change - Updates the lport's offload flags based
663 * on the LLD netdev's FCoE feature flags
665 static void fcoe_netdev_features_change(struct fc_lport *lport,
666 struct net_device *netdev)
668 mutex_lock(&lport->lp_mutex);
670 if (netdev->features & NETIF_F_SG)
671 lport->sg_supp = 1;
672 else
673 lport->sg_supp = 0;
675 if (netdev->features & NETIF_F_FCOE_CRC) {
676 lport->crc_offload = 1;
677 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
678 } else {
679 lport->crc_offload = 0;
682 if (netdev->features & NETIF_F_FSO) {
683 lport->seq_offload = 1;
684 lport->lso_max = netdev->gso_max_size;
685 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
686 lport->lso_max);
687 } else {
688 lport->seq_offload = 0;
689 lport->lso_max = 0;
692 if (netdev->fcoe_ddp_xid) {
693 lport->lro_enabled = 1;
694 lport->lro_xid = netdev->fcoe_ddp_xid;
695 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
696 lport->lro_xid);
697 } else {
698 lport->lro_enabled = 0;
699 lport->lro_xid = 0;
702 mutex_unlock(&lport->lp_mutex);
706 * fcoe_netdev_config() - Set up net devive for SW FCoE
707 * @lport: The local port that is associated with the net device
708 * @netdev: The associated net device
710 * Must be called after fcoe_lport_config() as it will use local port mutex
712 * Returns: 0 for success
714 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
716 u32 mfs;
717 u64 wwnn, wwpn;
718 struct fcoe_interface *fcoe;
719 struct fcoe_ctlr *ctlr;
720 struct fcoe_port *port;
722 /* Setup lport private data to point to fcoe softc */
723 port = lport_priv(lport);
724 fcoe = port->priv;
725 ctlr = fcoe_to_ctlr(fcoe);
727 /* Figure out the VLAN ID, if any */
728 if (is_vlan_dev(netdev))
729 lport->vlan = vlan_dev_vlan_id(netdev);
730 else
731 lport->vlan = 0;
734 * Determine max frame size based on underlying device and optional
735 * user-configured limit. If the MFS is too low, fcoe_link_ok()
736 * will return 0, so do this first.
738 mfs = netdev->mtu;
739 if (netdev->features & NETIF_F_FCOE_MTU) {
740 mfs = FCOE_MTU;
741 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
743 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
744 if (fc_set_mfs(lport, mfs))
745 return -EINVAL;
747 /* offload features support */
748 fcoe_netdev_features_change(lport, netdev);
750 skb_queue_head_init(&port->fcoe_pending_queue);
751 port->fcoe_pending_queue_active = 0;
752 timer_setup(&port->timer, fcoe_queue_timer, 0);
754 fcoe_link_speed_update(lport);
756 if (!lport->vport) {
757 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
758 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
759 fc_set_wwnn(lport, wwnn);
760 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
761 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
762 2, 0);
763 fc_set_wwpn(lport, wwpn);
766 return 0;
770 * fcoe_shost_config() - Set up the SCSI host associated with a local port
771 * @lport: The local port
772 * @dev: The device associated with the SCSI host
774 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
776 * Returns: 0 for success
778 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
780 int rc = 0;
782 /* lport scsi host config */
783 lport->host->max_lun = FCOE_MAX_LUN;
784 lport->host->max_id = FCOE_MAX_FCP_TARGET;
785 lport->host->max_channel = 0;
786 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
788 if (lport->vport)
789 lport->host->transportt = fcoe_vport_scsi_transport;
790 else
791 lport->host->transportt = fcoe_nport_scsi_transport;
793 /* add the new host to the SCSI-ml */
794 rc = scsi_add_host(lport->host, dev);
795 if (rc) {
796 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
797 "error on scsi_add_host\n");
798 return rc;
801 if (!lport->vport)
802 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
804 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
805 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
806 fcoe_netdev(lport)->name);
808 return 0;
813 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
814 * @lport: The local port that is associated with the net device
815 * @netdev: The associated net device
817 * Must be called after fcoe_shost_config() as it will use local port mutex
820 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
822 struct fcoe_interface *fcoe;
823 struct fcoe_port *port;
824 struct net_device *realdev;
825 int rc;
827 port = lport_priv(lport);
828 fcoe = port->priv;
829 realdev = fcoe->realdev;
831 /* No FDMI state m/c for NPIV ports */
832 if (lport->vport)
833 return;
835 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
836 struct netdev_fcoe_hbainfo *fdmi;
837 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
838 if (!fdmi)
839 return;
841 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
842 fdmi);
843 if (rc) {
844 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
845 "information from netdev.\n");
846 return;
849 snprintf(fc_host_serial_number(lport->host),
850 FC_SERIAL_NUMBER_SIZE,
851 "%s",
852 fdmi->serial_number);
853 snprintf(fc_host_manufacturer(lport->host),
854 FC_SERIAL_NUMBER_SIZE,
855 "%s",
856 fdmi->manufacturer);
857 snprintf(fc_host_model(lport->host),
858 FC_SYMBOLIC_NAME_SIZE,
859 "%s",
860 fdmi->model);
861 snprintf(fc_host_model_description(lport->host),
862 FC_SYMBOLIC_NAME_SIZE,
863 "%s",
864 fdmi->model_description);
865 snprintf(fc_host_hardware_version(lport->host),
866 FC_VERSION_STRING_SIZE,
867 "%s",
868 fdmi->hardware_version);
869 snprintf(fc_host_driver_version(lport->host),
870 FC_VERSION_STRING_SIZE,
871 "%s",
872 fdmi->driver_version);
873 snprintf(fc_host_optionrom_version(lport->host),
874 FC_VERSION_STRING_SIZE,
875 "%s",
876 fdmi->optionrom_version);
877 snprintf(fc_host_firmware_version(lport->host),
878 FC_VERSION_STRING_SIZE,
879 "%s",
880 fdmi->firmware_version);
882 /* Enable FDMI lport states */
883 lport->fdmi_enabled = 1;
884 kfree(fdmi);
885 } else {
886 lport->fdmi_enabled = 0;
887 printk(KERN_INFO "fcoe: No FDMI support.\n");
892 * fcoe_oem_match() - The match routine for the offloaded exchange manager
893 * @fp: The I/O frame
895 * This routine will be associated with an exchange manager (EM). When
896 * the libfc exchange handling code is looking for an EM to use it will
897 * call this routine and pass it the frame that it wishes to send. This
898 * routine will return True if the associated EM is to be used and False
899 * if the echange code should continue looking for an EM.
901 * The offload EM that this routine is associated with will handle any
902 * packets that are for SCSI read requests.
904 * This has been enhanced to work when FCoE stack is operating in target
905 * mode.
907 * Returns: True for read types I/O, otherwise returns false.
909 static bool fcoe_oem_match(struct fc_frame *fp)
911 struct fc_frame_header *fh = fc_frame_header_get(fp);
912 struct fcp_cmnd *fcp;
914 if (fc_fcp_is_read(fr_fsp(fp)) &&
915 (fr_fsp(fp)->data_len > fcoe_ddp_min))
916 return true;
917 else if ((fr_fsp(fp) == NULL) &&
918 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
919 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
920 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
921 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
922 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
923 return true;
925 return false;
929 * fcoe_em_config() - Allocate and configure an exchange manager
930 * @lport: The local port that the new EM will be associated with
932 * Returns: 0 on success
934 static inline int fcoe_em_config(struct fc_lport *lport)
936 struct fcoe_port *port = lport_priv(lport);
937 struct fcoe_interface *fcoe = port->priv;
938 struct fcoe_interface *oldfcoe = NULL;
939 struct net_device *old_real_dev, *cur_real_dev;
940 u16 min_xid = FCOE_MIN_XID;
941 u16 max_xid = FCOE_MAX_XID;
944 * Check if need to allocate an em instance for
945 * offload exchange ids to be shared across all VN_PORTs/lport.
947 if (!lport->lro_enabled || !lport->lro_xid ||
948 (lport->lro_xid >= max_xid)) {
949 lport->lro_xid = 0;
950 goto skip_oem;
954 * Reuse existing offload em instance in case
955 * it is already allocated on real eth device
957 if (is_vlan_dev(fcoe->netdev))
958 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
959 else
960 cur_real_dev = fcoe->netdev;
962 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
963 if (is_vlan_dev(oldfcoe->netdev))
964 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
965 else
966 old_real_dev = oldfcoe->netdev;
968 if (cur_real_dev == old_real_dev) {
969 fcoe->oem = oldfcoe->oem;
970 break;
974 if (fcoe->oem) {
975 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
976 printk(KERN_ERR "fcoe_em_config: failed to add "
977 "offload em:%p on interface:%s\n",
978 fcoe->oem, fcoe->netdev->name);
979 return -ENOMEM;
981 } else {
982 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
983 FCOE_MIN_XID, lport->lro_xid,
984 fcoe_oem_match);
985 if (!fcoe->oem) {
986 printk(KERN_ERR "fcoe_em_config: failed to allocate "
987 "em for offload exches on interface:%s\n",
988 fcoe->netdev->name);
989 return -ENOMEM;
994 * Exclude offload EM xid range from next EM xid range.
996 min_xid += lport->lro_xid + 1;
998 skip_oem:
999 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
1000 printk(KERN_ERR "fcoe_em_config: failed to "
1001 "allocate em on interface %s\n", fcoe->netdev->name);
1002 return -ENOMEM;
1005 return 0;
1009 * fcoe_if_destroy() - Tear down a SW FCoE instance
1010 * @lport: The local port to be destroyed
1012 * Locking: Must be called with the RTNL mutex held.
1015 static void fcoe_if_destroy(struct fc_lport *lport)
1017 struct fcoe_port *port = lport_priv(lport);
1018 struct fcoe_interface *fcoe = port->priv;
1019 struct net_device *netdev = fcoe->netdev;
1021 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
1023 /* Logout of the fabric */
1024 fc_fabric_logoff(lport);
1026 /* Cleanup the fc_lport */
1027 fc_lport_destroy(lport);
1029 /* Stop the transmit retry timer */
1030 del_timer_sync(&port->timer);
1032 /* Free existing transmit skbs */
1033 fcoe_clean_pending_queue(lport);
1035 if (!is_zero_ether_addr(port->data_src_addr))
1036 dev_uc_del(netdev, port->data_src_addr);
1037 if (lport->vport)
1038 synchronize_net();
1039 else
1040 fcoe_interface_remove(fcoe);
1042 /* Free queued packets for the per-CPU receive threads */
1043 fcoe_percpu_clean(lport);
1045 /* Detach from the scsi-ml */
1046 fc_remove_host(lport->host);
1047 scsi_remove_host(lport->host);
1049 /* Destroy lport scsi_priv */
1050 fc_fcp_destroy(lport);
1052 /* There are no more rports or I/O, free the EM */
1053 fc_exch_mgr_free(lport);
1055 /* Free memory used by statistical counters */
1056 fc_lport_free_stats(lport);
1059 * Release the Scsi_Host for vport but hold on to
1060 * master lport until it fcoe interface fully cleaned-up.
1062 if (lport->vport)
1063 scsi_host_put(lport->host);
1067 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1068 * @lport: The local port to setup DDP for
1069 * @xid: The exchange ID for this DDP transfer
1070 * @sgl: The scatterlist describing this transfer
1071 * @sgc: The number of sg items
1073 * Returns: 0 if the DDP context was not configured
1075 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1076 struct scatterlist *sgl, unsigned int sgc)
1078 struct net_device *netdev = fcoe_netdev(lport);
1080 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1081 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1082 xid, sgl,
1083 sgc);
1085 return 0;
1089 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1090 * @lport: The local port to setup DDP for
1091 * @xid: The exchange ID for this DDP transfer
1092 * @sgl: The scatterlist describing this transfer
1093 * @sgc: The number of sg items
1095 * Returns: 0 if the DDP context was not configured
1097 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1098 struct scatterlist *sgl, unsigned int sgc)
1100 struct net_device *netdev = fcoe_netdev(lport);
1102 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1103 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1104 sgl, sgc);
1106 return 0;
1111 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1112 * @lport: The local port to complete DDP on
1113 * @xid: The exchange ID for this DDP transfer
1115 * Returns: the length of data that have been completed by DDP
1117 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1119 struct net_device *netdev = fcoe_netdev(lport);
1121 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1122 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1123 return 0;
1127 * fcoe_if_create() - Create a FCoE instance on an interface
1128 * @fcoe: The FCoE interface to create a local port on
1129 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1130 * @npiv: Indicates if the port is a vport or not
1132 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1134 * Returns: The allocated fc_lport or an error pointer
1136 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1137 struct device *parent, int npiv)
1139 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1140 struct net_device *netdev = fcoe->netdev;
1141 struct fc_lport *lport, *n_port;
1142 struct fcoe_port *port;
1143 struct Scsi_Host *shost;
1144 int rc;
1146 * parent is only a vport if npiv is 1,
1147 * but we'll only use vport in that case so go ahead and set it
1149 struct fc_vport *vport = dev_to_vport(parent);
1151 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1153 if (!npiv)
1154 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1155 else
1156 lport = libfc_vport_create(vport, sizeof(*port));
1158 if (!lport) {
1159 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1160 rc = -ENOMEM;
1161 goto out;
1163 port = lport_priv(lport);
1164 port->lport = lport;
1165 port->priv = fcoe;
1166 port->get_netdev = fcoe_netdev;
1167 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1168 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1169 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1172 * Need to add the lport to the hostlist
1173 * so we catch NETDEV_CHANGE events.
1175 fcoe_hostlist_add(lport);
1177 /* configure a fc_lport including the exchange manager */
1178 rc = fcoe_lport_config(lport);
1179 if (rc) {
1180 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1181 "interface\n");
1182 goto out_host_put;
1185 if (npiv) {
1186 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1187 "%16.16llx %16.16llx\n",
1188 vport->node_name, vport->port_name);
1189 fc_set_wwnn(lport, vport->node_name);
1190 fc_set_wwpn(lport, vport->port_name);
1193 /* configure lport network properties */
1194 rc = fcoe_netdev_config(lport, netdev);
1195 if (rc) {
1196 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1197 "interface\n");
1198 goto out_lp_destroy;
1201 /* configure lport scsi host properties */
1202 rc = fcoe_shost_config(lport, parent);
1203 if (rc) {
1204 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1205 "interface\n");
1206 goto out_lp_destroy;
1209 /* Initialize the library */
1210 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
1211 if (rc) {
1212 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1213 "interface\n");
1214 goto out_lp_destroy;
1217 /* Initialized FDMI information */
1218 fcoe_fdmi_info(lport, netdev);
1221 * fcoe_em_alloc() and fcoe_hostlist_add() both
1222 * need to be atomic with respect to other changes to the
1223 * hostlist since fcoe_em_alloc() looks for an existing EM
1224 * instance on host list updated by fcoe_hostlist_add().
1226 * This is currently handled through the fcoe_config_mutex
1227 * begin held.
1229 if (!npiv)
1230 /* lport exch manager allocation */
1231 rc = fcoe_em_config(lport);
1232 else {
1233 shost = vport_to_shost(vport);
1234 n_port = shost_priv(shost);
1235 rc = fc_exch_mgr_list_clone(n_port, lport);
1238 if (rc) {
1239 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1240 goto out_lp_destroy;
1243 return lport;
1245 out_lp_destroy:
1246 fc_exch_mgr_free(lport);
1247 out_host_put:
1248 fcoe_hostlist_del(lport);
1249 scsi_host_put(lport->host);
1250 out:
1251 return ERR_PTR(rc);
1255 * fcoe_if_init() - Initialization routine for fcoe.ko
1257 * Attaches the SW FCoE transport to the FC transport
1259 * Returns: 0 on success
1261 static int __init fcoe_if_init(void)
1263 /* attach to scsi transport */
1264 fcoe_nport_scsi_transport =
1265 fc_attach_transport(&fcoe_nport_fc_functions);
1266 fcoe_vport_scsi_transport =
1267 fc_attach_transport(&fcoe_vport_fc_functions);
1269 if (!fcoe_nport_scsi_transport) {
1270 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1271 return -ENODEV;
1274 return 0;
1278 * fcoe_if_exit() - Tear down fcoe.ko
1280 * Detaches the SW FCoE transport from the FC transport
1282 * Returns: 0 on success
1284 static int __exit fcoe_if_exit(void)
1286 fc_release_transport(fcoe_nport_scsi_transport);
1287 fc_release_transport(fcoe_vport_scsi_transport);
1288 fcoe_nport_scsi_transport = NULL;
1289 fcoe_vport_scsi_transport = NULL;
1290 return 0;
1293 static void fcoe_thread_cleanup_local(unsigned int cpu)
1295 struct page *crc_eof;
1296 struct fcoe_percpu_s *p;
1298 p = per_cpu_ptr(&fcoe_percpu, cpu);
1299 spin_lock_bh(&p->fcoe_rx_list.lock);
1300 crc_eof = p->crc_eof_page;
1301 p->crc_eof_page = NULL;
1302 p->crc_eof_offset = 0;
1303 spin_unlock_bh(&p->fcoe_rx_list.lock);
1305 if (crc_eof)
1306 put_page(crc_eof);
1307 flush_work(&p->work);
1311 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1312 * command.
1314 * This routine selects next CPU based on cpumask to distribute
1315 * incoming requests in round robin.
1317 * Returns: int CPU number
1319 static inline unsigned int fcoe_select_cpu(void)
1321 static unsigned int selected_cpu;
1323 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1324 if (selected_cpu >= nr_cpu_ids)
1325 selected_cpu = cpumask_first(cpu_online_mask);
1327 return selected_cpu;
1331 * fcoe_rcv() - Receive packets from a net device
1332 * @skb: The received packet
1333 * @netdev: The net device that the packet was received on
1334 * @ptype: The packet type context
1335 * @olddev: The last device net device
1337 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1338 * FC frame and passes the frame to libfc.
1340 * Returns: 0 for success
1342 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1343 struct packet_type *ptype, struct net_device *olddev)
1345 struct fc_lport *lport;
1346 struct fcoe_rcv_info *fr;
1347 struct fcoe_ctlr *ctlr;
1348 struct fcoe_interface *fcoe;
1349 struct fc_frame_header *fh;
1350 struct fcoe_percpu_s *fps;
1351 struct ethhdr *eh;
1352 unsigned int cpu;
1354 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1355 ctlr = fcoe_to_ctlr(fcoe);
1356 lport = ctlr->lp;
1357 if (unlikely(!lport)) {
1358 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
1359 goto err2;
1361 if (!lport->link_up)
1362 goto err2;
1364 FCOE_NETDEV_DBG(netdev,
1365 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1366 skb->len, skb->data_len, skb->head, skb->data,
1367 skb_tail_pointer(skb), skb_end_pointer(skb),
1368 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1371 skb = skb_share_check(skb, GFP_ATOMIC);
1373 if (skb == NULL)
1374 return NET_RX_DROP;
1376 eh = eth_hdr(skb);
1378 if (is_fip_mode(ctlr) &&
1379 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
1380 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1381 eh->h_source);
1382 goto err;
1386 * Check for minimum frame length, and make sure required FCoE
1387 * and FC headers are pulled into the linear data area.
1389 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1390 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1391 goto err;
1393 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1394 fh = (struct fc_frame_header *) skb_transport_header(skb);
1396 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1397 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1398 eh->h_dest);
1399 goto err;
1402 fr = fcoe_dev_from_skb(skb);
1403 fr->fr_dev = lport;
1406 * In case the incoming frame's exchange is originated from
1407 * the initiator, then received frame's exchange id is ANDed
1408 * with fc_cpu_mask bits to get the same cpu on which exchange
1409 * was originated, otherwise select cpu using rx exchange id
1410 * or fcoe_select_cpu().
1412 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1413 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1414 else {
1415 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1416 cpu = fcoe_select_cpu();
1417 else
1418 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1421 if (cpu >= nr_cpu_ids)
1422 goto err;
1424 fps = &per_cpu(fcoe_percpu, cpu);
1425 spin_lock(&fps->fcoe_rx_list.lock);
1427 * We now have a valid CPU that we're targeting for
1428 * this skb. We also have this receive thread locked,
1429 * so we're free to queue skbs into it's queue.
1433 * Note: We used to have a set of conditions under which we would
1434 * call fcoe_recv_frame directly, rather than queuing to the rx list
1435 * as it could save a few cycles, but doing so is prohibited, as
1436 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1437 * in softirq context.
1439 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1440 schedule_work_on(cpu, &fps->work);
1441 spin_unlock(&fps->fcoe_rx_list.lock);
1443 return NET_RX_SUCCESS;
1444 err:
1445 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
1446 put_cpu();
1447 err2:
1448 kfree_skb(skb);
1449 return NET_RX_DROP;
1453 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1454 * @skb: The packet to be transmitted
1455 * @tlen: The total length of the trailer
1457 * Returns: 0 for success
1459 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1461 struct fcoe_percpu_s *fps;
1462 int rc;
1464 fps = &get_cpu_var(fcoe_percpu);
1465 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1466 put_cpu_var(fcoe_percpu);
1468 return rc;
1472 * fcoe_xmit() - Transmit a FCoE frame
1473 * @lport: The local port that the frame is to be transmitted for
1474 * @fp: The frame to be transmitted
1476 * Return: 0 for success
1478 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1480 int wlen;
1481 u32 crc;
1482 struct ethhdr *eh;
1483 struct fcoe_crc_eof *cp;
1484 struct sk_buff *skb;
1485 struct fc_stats *stats;
1486 struct fc_frame_header *fh;
1487 unsigned int hlen; /* header length implies the version */
1488 unsigned int tlen; /* trailer length */
1489 unsigned int elen; /* eth header, may include vlan */
1490 struct fcoe_port *port = lport_priv(lport);
1491 struct fcoe_interface *fcoe = port->priv;
1492 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1493 u8 sof, eof;
1494 struct fcoe_hdr *hp;
1496 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1498 fh = fc_frame_header_get(fp);
1499 skb = fp_skb(fp);
1500 wlen = skb->len / FCOE_WORD_TO_BYTE;
1502 if (!lport->link_up) {
1503 kfree_skb(skb);
1504 return 0;
1507 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1508 fcoe_ctlr_els_send(ctlr, lport, skb))
1509 return 0;
1511 sof = fr_sof(fp);
1512 eof = fr_eof(fp);
1514 elen = sizeof(struct ethhdr);
1515 hlen = sizeof(struct fcoe_hdr);
1516 tlen = sizeof(struct fcoe_crc_eof);
1517 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1519 /* crc offload */
1520 if (likely(lport->crc_offload)) {
1521 skb->ip_summed = CHECKSUM_PARTIAL;
1522 skb->csum_start = skb_headroom(skb);
1523 skb->csum_offset = skb->len;
1524 crc = 0;
1525 } else {
1526 skb->ip_summed = CHECKSUM_NONE;
1527 crc = fcoe_fc_crc(fp);
1530 /* copy port crc and eof to the skb buff */
1531 if (skb_is_nonlinear(skb)) {
1532 skb_frag_t *frag;
1533 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1534 kfree_skb(skb);
1535 return -ENOMEM;
1537 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1538 cp = kmap_atomic(skb_frag_page(frag))
1539 + frag->page_offset;
1540 } else {
1541 cp = skb_put(skb, tlen);
1544 memset(cp, 0, sizeof(*cp));
1545 cp->fcoe_eof = eof;
1546 cp->fcoe_crc32 = cpu_to_le32(~crc);
1548 if (skb_is_nonlinear(skb)) {
1549 kunmap_atomic(cp);
1550 cp = NULL;
1553 /* adjust skb network/transport offsets to match mac/fcoe/port */
1554 skb_push(skb, elen + hlen);
1555 skb_reset_mac_header(skb);
1556 skb_reset_network_header(skb);
1557 skb->mac_len = elen;
1558 skb->protocol = htons(ETH_P_FCOE);
1559 skb->priority = fcoe->priority;
1561 if (is_vlan_dev(fcoe->netdev) &&
1562 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
1563 /* must set skb->dev before calling vlan_put_tag */
1564 skb->dev = fcoe->realdev;
1565 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1566 vlan_dev_vlan_id(fcoe->netdev));
1567 } else
1568 skb->dev = fcoe->netdev;
1570 /* fill up mac and fcoe headers */
1571 eh = eth_hdr(skb);
1572 eh->h_proto = htons(ETH_P_FCOE);
1573 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1574 if (ctlr->map_dest)
1575 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1577 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1578 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
1579 else
1580 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1582 hp = (struct fcoe_hdr *)(eh + 1);
1583 memset(hp, 0, sizeof(*hp));
1584 if (FC_FCOE_VER)
1585 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1586 hp->fcoe_sof = sof;
1588 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1589 if (lport->seq_offload && fr_max_payload(fp)) {
1590 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1591 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1592 } else {
1593 skb_shinfo(skb)->gso_type = 0;
1594 skb_shinfo(skb)->gso_size = 0;
1596 /* update tx stats: regardless if LLD fails */
1597 stats = per_cpu_ptr(lport->stats, get_cpu());
1598 stats->TxFrames++;
1599 stats->TxWords += wlen;
1600 put_cpu();
1602 /* send down to lld */
1603 fr_dev(fp) = lport;
1604 fcoe_port_send(port, skb);
1605 return 0;
1609 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1610 * @lport: The local port the frame was received on
1611 * @fp: The received frame
1613 * Return: 0 on passing filtering checks
1615 static inline int fcoe_filter_frames(struct fc_lport *lport,
1616 struct fc_frame *fp)
1618 struct fcoe_ctlr *ctlr;
1619 struct fcoe_interface *fcoe;
1620 struct fc_frame_header *fh;
1621 struct sk_buff *skb = (struct sk_buff *)fp;
1622 struct fc_stats *stats;
1625 * We only check CRC if no offload is available and if it is
1626 * it's solicited data, in which case, the FCP layer would
1627 * check it during the copy.
1629 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1630 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1631 else
1632 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1634 fh = (struct fc_frame_header *) skb_transport_header(skb);
1635 fh = fc_frame_header_get(fp);
1636 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1637 return 0;
1639 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1640 ctlr = fcoe_to_ctlr(fcoe);
1641 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1642 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1643 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1644 return -EINVAL;
1647 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1648 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1649 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1650 return 0;
1653 stats = per_cpu_ptr(lport->stats, get_cpu());
1654 stats->InvalidCRCCount++;
1655 if (stats->InvalidCRCCount < 5)
1656 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1657 put_cpu();
1658 return -EINVAL;
1662 * fcoe_recv_frame() - process a single received frame
1663 * @skb: frame to process
1665 static void fcoe_recv_frame(struct sk_buff *skb)
1667 u32 fr_len;
1668 struct fc_lport *lport;
1669 struct fcoe_rcv_info *fr;
1670 struct fc_stats *stats;
1671 struct fcoe_crc_eof crc_eof;
1672 struct fc_frame *fp;
1673 struct fcoe_port *port;
1674 struct fcoe_hdr *hp;
1676 fr = fcoe_dev_from_skb(skb);
1677 lport = fr->fr_dev;
1678 if (unlikely(!lport)) {
1679 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
1680 kfree_skb(skb);
1681 return;
1684 FCOE_NETDEV_DBG(skb->dev,
1685 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1686 skb->len, skb->data_len,
1687 skb->head, skb->data, skb_tail_pointer(skb),
1688 skb_end_pointer(skb), skb->csum,
1689 skb->dev ? skb->dev->name : "<NULL>");
1691 port = lport_priv(lport);
1692 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
1695 * Frame length checks and setting up the header pointers
1696 * was done in fcoe_rcv already.
1698 hp = (struct fcoe_hdr *) skb_network_header(skb);
1700 stats = per_cpu_ptr(lport->stats, get_cpu());
1701 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1702 if (stats->ErrorFrames < 5)
1703 printk(KERN_WARNING "fcoe: FCoE version "
1704 "mismatch: The frame has "
1705 "version %x, but the "
1706 "initiator supports version "
1707 "%x\n", FC_FCOE_DECAPS_VER(hp),
1708 FC_FCOE_VER);
1709 goto drop;
1712 skb_pull(skb, sizeof(struct fcoe_hdr));
1713 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1715 stats->RxFrames++;
1716 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1718 fp = (struct fc_frame *)skb;
1719 fc_frame_init(fp);
1720 fr_dev(fp) = lport;
1721 fr_sof(fp) = hp->fcoe_sof;
1723 /* Copy out the CRC and EOF trailer for access */
1724 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1725 goto drop;
1726 fr_eof(fp) = crc_eof.fcoe_eof;
1727 fr_crc(fp) = crc_eof.fcoe_crc32;
1728 if (pskb_trim(skb, fr_len))
1729 goto drop;
1731 if (!fcoe_filter_frames(lport, fp)) {
1732 put_cpu();
1733 fc_exch_recv(lport, fp);
1734 return;
1736 drop:
1737 stats->ErrorFrames++;
1738 put_cpu();
1739 kfree_skb(skb);
1743 * fcoe_receive_work() - The per-CPU worker
1744 * @work: The work struct
1747 static void fcoe_receive_work(struct work_struct *work)
1749 struct fcoe_percpu_s *p;
1750 struct sk_buff *skb;
1751 struct sk_buff_head tmp;
1753 p = container_of(work, struct fcoe_percpu_s, work);
1754 skb_queue_head_init(&tmp);
1756 spin_lock_bh(&p->fcoe_rx_list.lock);
1757 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1758 spin_unlock_bh(&p->fcoe_rx_list.lock);
1760 if (!skb_queue_len(&tmp))
1761 return;
1763 while ((skb = __skb_dequeue(&tmp)))
1764 fcoe_recv_frame(skb);
1768 * fcoe_dev_setup() - Setup the link change notification interface
1770 static void fcoe_dev_setup(void)
1772 register_dcbevent_notifier(&dcb_notifier);
1773 register_netdevice_notifier(&fcoe_notifier);
1777 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1779 static void fcoe_dev_cleanup(void)
1781 unregister_dcbevent_notifier(&dcb_notifier);
1782 unregister_netdevice_notifier(&fcoe_notifier);
1785 static struct fcoe_interface *
1786 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1788 struct fcoe_interface *fcoe;
1789 struct net_device *real_dev;
1791 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1792 if (is_vlan_dev(fcoe->netdev))
1793 real_dev = vlan_dev_real_dev(fcoe->netdev);
1794 else
1795 real_dev = fcoe->netdev;
1797 if (netdev == real_dev)
1798 return fcoe;
1800 return NULL;
1803 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1804 ulong event, void *ptr)
1806 struct dcb_app_type *entry = ptr;
1807 struct fcoe_ctlr *ctlr;
1808 struct fcoe_interface *fcoe;
1809 struct net_device *netdev;
1810 int prio;
1812 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1813 return NOTIFY_OK;
1815 netdev = dev_get_by_index(&init_net, entry->ifindex);
1816 if (!netdev)
1817 return NOTIFY_OK;
1819 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1820 dev_put(netdev);
1821 if (!fcoe)
1822 return NOTIFY_OK;
1824 ctlr = fcoe_to_ctlr(fcoe);
1826 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1827 prio = ffs(entry->app.priority) - 1;
1828 else
1829 prio = entry->app.priority;
1831 if (prio < 0)
1832 return NOTIFY_OK;
1834 if (entry->app.protocol == ETH_P_FIP ||
1835 entry->app.protocol == ETH_P_FCOE)
1836 ctlr->priority = prio;
1838 if (entry->app.protocol == ETH_P_FCOE)
1839 fcoe->priority = prio;
1841 return NOTIFY_OK;
1845 * fcoe_device_notification() - Handler for net device events
1846 * @notifier: The context of the notification
1847 * @event: The type of event
1848 * @ptr: The net device that the event was on
1850 * This function is called by the Ethernet driver in case of link change event.
1852 * Returns: 0 for success
1854 static int fcoe_device_notification(struct notifier_block *notifier,
1855 ulong event, void *ptr)
1857 struct fcoe_ctlr_device *cdev;
1858 struct fc_lport *lport = NULL;
1859 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1860 struct fcoe_ctlr *ctlr;
1861 struct fcoe_interface *fcoe;
1862 struct fcoe_port *port;
1863 struct fc_stats *stats;
1864 u32 link_possible = 1;
1865 u32 mfs;
1866 int rc = NOTIFY_OK;
1868 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1869 if (fcoe->netdev == netdev) {
1870 ctlr = fcoe_to_ctlr(fcoe);
1871 lport = ctlr->lp;
1872 break;
1875 if (!lport) {
1876 rc = NOTIFY_DONE;
1877 goto out;
1880 switch (event) {
1881 case NETDEV_DOWN:
1882 case NETDEV_GOING_DOWN:
1883 link_possible = 0;
1884 break;
1885 case NETDEV_UP:
1886 case NETDEV_CHANGE:
1887 break;
1888 case NETDEV_CHANGEMTU:
1889 if (netdev->features & NETIF_F_FCOE_MTU)
1890 break;
1891 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1892 sizeof(struct fcoe_crc_eof));
1893 if (mfs >= FC_MIN_MAX_FRAME)
1894 fc_set_mfs(lport, mfs);
1895 break;
1896 case NETDEV_REGISTER:
1897 break;
1898 case NETDEV_UNREGISTER:
1899 list_del(&fcoe->list);
1900 port = lport_priv(ctlr->lp);
1901 fcoe_vport_remove(lport);
1902 mutex_lock(&fcoe_config_mutex);
1903 fcoe_if_destroy(lport);
1904 if (!fcoe->removed)
1905 fcoe_interface_remove(fcoe);
1906 fcoe_interface_cleanup(fcoe);
1907 mutex_unlock(&fcoe_config_mutex);
1908 fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr));
1909 goto out;
1910 break;
1911 case NETDEV_FEAT_CHANGE:
1912 fcoe_netdev_features_change(lport, netdev);
1913 break;
1914 default:
1915 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1916 "from netdev netlink\n", event);
1919 fcoe_link_speed_update(lport);
1921 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
1923 if (link_possible && !fcoe_link_ok(lport)) {
1924 switch (cdev->enabled) {
1925 case FCOE_CTLR_DISABLED:
1926 pr_info("Link up while interface is disabled.\n");
1927 break;
1928 case FCOE_CTLR_ENABLED:
1929 case FCOE_CTLR_UNUSED:
1930 fcoe_ctlr_link_up(ctlr);
1932 } else if (fcoe_ctlr_link_down(ctlr)) {
1933 switch (cdev->enabled) {
1934 case FCOE_CTLR_DISABLED:
1935 pr_info("Link down while interface is disabled.\n");
1936 break;
1937 case FCOE_CTLR_ENABLED:
1938 case FCOE_CTLR_UNUSED:
1939 stats = per_cpu_ptr(lport->stats, get_cpu());
1940 stats->LinkFailureCount++;
1941 put_cpu();
1942 fcoe_clean_pending_queue(lport);
1945 out:
1946 return rc;
1950 * fcoe_disable() - Disables a FCoE interface
1951 * @netdev : The net_device object the Ethernet interface to create on
1953 * Called from fcoe transport.
1955 * Returns: 0 for success
1957 * Deprecated: use fcoe_ctlr_enabled()
1959 static int fcoe_disable(struct net_device *netdev)
1961 struct fcoe_ctlr *ctlr;
1962 struct fcoe_interface *fcoe;
1963 int rc = 0;
1965 mutex_lock(&fcoe_config_mutex);
1967 rtnl_lock();
1968 fcoe = fcoe_hostlist_lookup_port(netdev);
1969 rtnl_unlock();
1971 if (fcoe) {
1972 ctlr = fcoe_to_ctlr(fcoe);
1973 fcoe_ctlr_link_down(ctlr);
1974 fcoe_clean_pending_queue(ctlr->lp);
1975 } else
1976 rc = -ENODEV;
1978 mutex_unlock(&fcoe_config_mutex);
1979 return rc;
1983 * fcoe_enable() - Enables a FCoE interface
1984 * @netdev : The net_device object the Ethernet interface to create on
1986 * Called from fcoe transport.
1988 * Returns: 0 for success
1990 static int fcoe_enable(struct net_device *netdev)
1992 struct fcoe_ctlr *ctlr;
1993 struct fcoe_interface *fcoe;
1994 int rc = 0;
1996 mutex_lock(&fcoe_config_mutex);
1997 rtnl_lock();
1998 fcoe = fcoe_hostlist_lookup_port(netdev);
1999 rtnl_unlock();
2001 if (!fcoe) {
2002 rc = -ENODEV;
2003 goto out;
2006 ctlr = fcoe_to_ctlr(fcoe);
2008 if (!fcoe_link_ok(ctlr->lp))
2009 fcoe_ctlr_link_up(ctlr);
2011 out:
2012 mutex_unlock(&fcoe_config_mutex);
2013 return rc;
2017 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
2018 * @cdev: The FCoE Controller that is being enabled or disabled
2020 * fcoe_sysfs will ensure that the state of 'enabled' has
2021 * changed, so no checking is necessary here. This routine simply
2022 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
2023 * When those routines are removed the functionality can be merged
2024 * here.
2026 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
2028 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
2029 struct fc_lport *lport = ctlr->lp;
2030 struct net_device *netdev = fcoe_netdev(lport);
2032 switch (cdev->enabled) {
2033 case FCOE_CTLR_ENABLED:
2034 return fcoe_enable(netdev);
2035 case FCOE_CTLR_DISABLED:
2036 return fcoe_disable(netdev);
2037 case FCOE_CTLR_UNUSED:
2038 default:
2039 return -ENOTSUPP;
2044 * fcoe_ctlr_mode() - Switch FIP mode
2045 * @cdev: The FCoE Controller that is being modified
2047 * When the FIP mode has been changed we need to update
2048 * the multicast addresses to ensure we get the correct
2049 * frames.
2051 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev)
2053 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2054 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2056 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN &&
2057 ctlr->mode != FIP_MODE_VN2VN) {
2058 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS);
2059 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2060 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS);
2061 } else if (ctlr->mode != FIP_MODE_FABRIC) {
2062 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2063 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS);
2064 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS);
2066 fcoe_ctlr_set_fip_mode(ctlr_dev);
2070 * fcoe_destroy() - Destroy a FCoE interface
2071 * @netdev : The net_device object the Ethernet interface to create on
2073 * Called from fcoe transport
2075 * Returns: 0 for success
2077 static int fcoe_destroy(struct net_device *netdev)
2079 struct fcoe_ctlr *ctlr;
2080 struct fcoe_interface *fcoe;
2081 struct fc_lport *lport;
2082 struct fcoe_port *port;
2083 int rc = 0;
2085 mutex_lock(&fcoe_config_mutex);
2086 rtnl_lock();
2087 fcoe = fcoe_hostlist_lookup_port(netdev);
2088 if (!fcoe) {
2089 rc = -ENODEV;
2090 goto out_nodev;
2092 ctlr = fcoe_to_ctlr(fcoe);
2093 lport = ctlr->lp;
2094 port = lport_priv(lport);
2095 list_del(&fcoe->list);
2096 queue_work(fcoe_wq, &port->destroy_work);
2097 out_nodev:
2098 rtnl_unlock();
2099 mutex_unlock(&fcoe_config_mutex);
2100 return rc;
2104 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2105 * @work: Handle to the FCoE port to be destroyed
2107 static void fcoe_destroy_work(struct work_struct *work)
2109 struct fcoe_ctlr_device *cdev;
2110 struct fcoe_ctlr *ctlr;
2111 struct fcoe_port *port;
2112 struct fcoe_interface *fcoe;
2114 port = container_of(work, struct fcoe_port, destroy_work);
2116 fcoe_vport_remove(port->lport);
2118 mutex_lock(&fcoe_config_mutex);
2120 fcoe = port->priv;
2121 ctlr = fcoe_to_ctlr(fcoe);
2122 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2124 rtnl_lock();
2125 fcoe_if_destroy(port->lport);
2126 if (!fcoe->removed)
2127 fcoe_interface_remove(fcoe);
2128 rtnl_unlock();
2129 fcoe_interface_cleanup(fcoe);
2131 mutex_unlock(&fcoe_config_mutex);
2133 fcoe_ctlr_device_delete(cdev);
2137 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2138 * @netdev : The net_device object the Ethernet interface to create on
2140 * Called from fcoe transport.
2142 * Returns: always returns true as this is the default FCoE transport,
2143 * i.e., support all netdevs.
2145 static bool fcoe_match(struct net_device *netdev)
2147 return true;
2151 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2152 * @netdev: The net_device object of the L2 link that should be queried
2153 * @port: The fcoe_port to bind FCoE APP priority with
2156 static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2158 int ctlr_prio = TC_PRIO_BESTEFFORT;
2159 int fcoe_prio = TC_PRIO_INTERACTIVE;
2160 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2161 #ifdef CONFIG_DCB
2162 int dcbx;
2163 u8 fup, up;
2164 struct net_device *netdev = fcoe->realdev;
2165 struct dcb_app app = {
2166 .priority = 0,
2167 .protocol = ETH_P_FCOE
2170 /* setup DCB priority attributes. */
2171 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2172 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2174 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2175 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2176 up = dcb_ieee_getapp_mask(netdev, &app);
2177 app.protocol = ETH_P_FIP;
2178 fup = dcb_ieee_getapp_mask(netdev, &app);
2179 } else {
2180 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2181 up = dcb_getapp(netdev, &app);
2182 app.protocol = ETH_P_FIP;
2183 fup = dcb_getapp(netdev, &app);
2186 fcoe_prio = ffs(up) ? ffs(up) - 1 : 0;
2187 ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio;
2189 #endif
2190 fcoe->priority = fcoe_prio;
2191 ctlr->priority = ctlr_prio;
2194 enum fcoe_create_link_state {
2195 FCOE_CREATE_LINK_DOWN,
2196 FCOE_CREATE_LINK_UP,
2200 * _fcoe_create() - (internal) Create a fcoe interface
2201 * @netdev : The net_device object the Ethernet interface to create on
2202 * @fip_mode: The FIP mode for this creation
2203 * @link_state: The ctlr link state on creation
2205 * Called from either the libfcoe 'create' module parameter
2206 * via fcoe_create or from fcoe_syfs's ctlr_create file.
2208 * libfcoe's 'create' module parameter is deprecated so some
2209 * consolidation of code can be done when that interface is
2210 * removed.
2212 static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode,
2213 enum fcoe_create_link_state link_state)
2215 int rc = 0;
2216 struct fcoe_ctlr_device *ctlr_dev;
2217 struct fcoe_ctlr *ctlr;
2218 struct fcoe_interface *fcoe;
2219 struct fc_lport *lport;
2221 mutex_lock(&fcoe_config_mutex);
2222 rtnl_lock();
2224 /* look for existing lport */
2225 if (fcoe_hostlist_lookup(netdev)) {
2226 rc = -EEXIST;
2227 goto out_nodev;
2230 fcoe = fcoe_interface_create(netdev, fip_mode);
2231 if (IS_ERR(fcoe)) {
2232 rc = PTR_ERR(fcoe);
2233 goto out_nodev;
2236 ctlr = fcoe_to_ctlr(fcoe);
2237 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2238 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
2239 if (IS_ERR(lport)) {
2240 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2241 netdev->name);
2242 rc = -EIO;
2243 if (!fcoe->removed)
2244 fcoe_interface_remove(fcoe);
2245 rtnl_unlock();
2246 fcoe_interface_cleanup(fcoe);
2247 mutex_unlock(&fcoe_config_mutex);
2248 fcoe_ctlr_device_delete(ctlr_dev);
2249 return rc;
2252 /* Make this the "master" N_Port */
2253 ctlr->lp = lport;
2255 /* setup DCB priority attributes. */
2256 fcoe_dcb_create(fcoe);
2258 /* start FIP Discovery and FLOGI */
2259 lport->boot_time = jiffies;
2260 fc_fabric_login(lport);
2263 * If the fcoe_ctlr_device is to be set to DISABLED
2264 * it must be done after the lport is added to the
2265 * hostlist, but before the rtnl_lock is released.
2266 * This is because the rtnl_lock protects the
2267 * hostlist that fcoe_device_notification uses. If
2268 * the FCoE Controller is intended to be created
2269 * DISABLED then 'enabled' needs to be considered
2270 * handling link events. 'enabled' must be set
2271 * before the lport can be found in the hostlist
2272 * when a link up event is received.
2274 if (link_state == FCOE_CREATE_LINK_UP)
2275 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2276 else
2277 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2279 if (link_state == FCOE_CREATE_LINK_UP &&
2280 !fcoe_link_ok(lport)) {
2281 rtnl_unlock();
2282 fcoe_ctlr_link_up(ctlr);
2283 mutex_unlock(&fcoe_config_mutex);
2284 return rc;
2287 out_nodev:
2288 rtnl_unlock();
2289 mutex_unlock(&fcoe_config_mutex);
2291 return rc;
2295 * fcoe_create() - Create a fcoe interface
2296 * @netdev : The net_device object the Ethernet interface to create on
2297 * @fip_mode: The FIP mode for this creation
2299 * Called from fcoe transport
2301 * Returns: 0 for success
2303 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode)
2305 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2309 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2310 * @netdev: The net_device to be used by the allocated FCoE Controller
2312 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2313 * in a link_down state. The allows the user an opportunity to configure
2314 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2316 * Creating in with this routine starts the FCoE Controller in Fabric
2317 * mode. The user can change to VN2VN or another mode before enabling.
2319 static int fcoe_ctlr_alloc(struct net_device *netdev)
2321 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2322 FCOE_CREATE_LINK_DOWN);
2326 * fcoe_link_ok() - Check if the link is OK for a local port
2327 * @lport: The local port to check link on
2329 * Returns: 0 if link is UP and OK, -1 if not
2332 static int fcoe_link_ok(struct fc_lport *lport)
2334 struct net_device *netdev = fcoe_netdev(lport);
2336 if (netif_oper_up(netdev))
2337 return 0;
2338 return -1;
2342 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2343 * @lport: The local port whose skbs are to be cleared
2345 * Must be called with fcoe_create_mutex held to single-thread completion.
2347 * This flushes the pending skbs by flush the work item for each CPU. The work
2348 * item on each possible CPU is flushed because we may have used the per-CPU
2349 * struct of an offline CPU.
2351 static void fcoe_percpu_clean(struct fc_lport *lport)
2353 struct fcoe_percpu_s *pp;
2354 unsigned int cpu;
2356 for_each_possible_cpu(cpu) {
2357 pp = &per_cpu(fcoe_percpu, cpu);
2359 flush_work(&pp->work);
2364 * fcoe_reset() - Reset a local port
2365 * @shost: The SCSI host associated with the local port to be reset
2367 * Returns: Always 0 (return value required by FC transport template)
2369 static int fcoe_reset(struct Scsi_Host *shost)
2371 struct fc_lport *lport = shost_priv(shost);
2372 struct fcoe_port *port = lport_priv(lport);
2373 struct fcoe_interface *fcoe = port->priv;
2374 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2375 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2377 fcoe_ctlr_link_down(ctlr);
2378 fcoe_clean_pending_queue(ctlr->lp);
2380 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2381 !fcoe_link_ok(ctlr->lp))
2382 fcoe_ctlr_link_up(ctlr);
2383 return 0;
2387 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2388 * @netdev: The net device used as a key
2390 * Locking: Must be called with the RNL mutex held.
2392 * Returns: NULL or the FCoE interface
2394 static struct fcoe_interface *
2395 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2397 struct fcoe_interface *fcoe;
2399 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2400 if (fcoe->netdev == netdev)
2401 return fcoe;
2403 return NULL;
2407 * fcoe_hostlist_lookup() - Find the local port associated with a
2408 * given net device
2409 * @netdev: The netdevice used as a key
2411 * Locking: Must be called with the RTNL mutex held
2413 * Returns: NULL or the local port
2415 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2417 struct fcoe_ctlr *ctlr;
2418 struct fcoe_interface *fcoe;
2420 fcoe = fcoe_hostlist_lookup_port(netdev);
2421 ctlr = fcoe_to_ctlr(fcoe);
2422 return (fcoe) ? ctlr->lp : NULL;
2426 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2427 * port to the hostlist
2428 * @lport: The local port that identifies the FCoE interface to be added
2430 * Locking: must be called with the RTNL mutex held
2432 * Returns: 0 for success
2434 static int fcoe_hostlist_add(const struct fc_lport *lport)
2436 struct fcoe_interface *fcoe;
2437 struct fcoe_port *port;
2439 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2440 if (!fcoe) {
2441 port = lport_priv(lport);
2442 fcoe = port->priv;
2443 list_add_tail(&fcoe->list, &fcoe_hostlist);
2445 return 0;
2449 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2450 * port to the hostlist
2451 * @lport: The local port that identifies the FCoE interface to be added
2453 * Locking: must be called with the RTNL mutex held
2456 static void fcoe_hostlist_del(const struct fc_lport *lport)
2458 struct fcoe_interface *fcoe;
2459 struct fcoe_port *port;
2461 port = lport_priv(lport);
2462 fcoe = port->priv;
2463 list_del(&fcoe->list);
2464 return;
2467 static struct fcoe_transport fcoe_sw_transport = {
2468 .name = {FCOE_TRANSPORT_DEFAULT},
2469 .attached = false,
2470 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2471 .match = fcoe_match,
2472 .alloc = fcoe_ctlr_alloc,
2473 .create = fcoe_create,
2474 .destroy = fcoe_destroy,
2475 .enable = fcoe_enable,
2476 .disable = fcoe_disable,
2480 * fcoe_init() - Initialize fcoe.ko
2482 * Returns: 0 on success, or a negative value on failure
2484 static int __init fcoe_init(void)
2486 struct fcoe_percpu_s *p;
2487 unsigned int cpu;
2488 int rc = 0;
2490 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2491 if (!fcoe_wq)
2492 return -ENOMEM;
2494 /* register as a fcoe transport */
2495 rc = fcoe_transport_attach(&fcoe_sw_transport);
2496 if (rc) {
2497 printk(KERN_ERR "failed to register an fcoe transport, check "
2498 "if libfcoe is loaded\n");
2499 goto out_destroy;
2502 mutex_lock(&fcoe_config_mutex);
2504 for_each_possible_cpu(cpu) {
2505 p = per_cpu_ptr(&fcoe_percpu, cpu);
2506 INIT_WORK(&p->work, fcoe_receive_work);
2507 skb_queue_head_init(&p->fcoe_rx_list);
2510 /* Setup link change notification */
2511 fcoe_dev_setup();
2513 rc = fcoe_if_init();
2514 if (rc)
2515 goto out_free;
2517 mutex_unlock(&fcoe_config_mutex);
2518 return 0;
2520 out_free:
2521 mutex_unlock(&fcoe_config_mutex);
2522 out_destroy:
2523 destroy_workqueue(fcoe_wq);
2524 return rc;
2526 module_init(fcoe_init);
2529 * fcoe_exit() - Clean up fcoe.ko
2531 * Returns: 0 on success or a negative value on failure
2533 static void __exit fcoe_exit(void)
2535 struct fcoe_interface *fcoe, *tmp;
2536 struct fcoe_ctlr *ctlr;
2537 struct fcoe_port *port;
2538 unsigned int cpu;
2540 mutex_lock(&fcoe_config_mutex);
2542 fcoe_dev_cleanup();
2544 /* releases the associated fcoe hosts */
2545 rtnl_lock();
2546 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2547 ctlr = fcoe_to_ctlr(fcoe);
2548 port = lport_priv(ctlr->lp);
2549 fcoe_hostlist_del(port->lport);
2550 queue_work(fcoe_wq, &port->destroy_work);
2552 rtnl_unlock();
2554 for_each_possible_cpu(cpu)
2555 fcoe_thread_cleanup_local(cpu);
2557 mutex_unlock(&fcoe_config_mutex);
2560 * destroy_work's may be chained but destroy_workqueue()
2561 * can take care of them. Just kill the fcoe_wq.
2563 destroy_workqueue(fcoe_wq);
2566 * Detaching from the scsi transport must happen after all
2567 * destroys are done on the fcoe_wq. destroy_workqueue will
2568 * enusre the fcoe_wq is flushed.
2570 fcoe_if_exit();
2572 /* detach from fcoe transport */
2573 fcoe_transport_detach(&fcoe_sw_transport);
2575 module_exit(fcoe_exit);
2578 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2579 * @seq: active sequence in the FLOGI or FDISC exchange
2580 * @fp: response frame, or error encoded in a pointer (timeout)
2581 * @arg: pointer to the fcoe_ctlr structure
2583 * This handles MAC address management for FCoE, then passes control on to
2584 * the libfc FLOGI response handler.
2586 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2588 struct fcoe_ctlr *fip = arg;
2589 struct fc_exch *exch = fc_seq_exch(seq);
2590 struct fc_lport *lport = exch->lp;
2591 u8 *mac;
2593 if (IS_ERR(fp))
2594 goto done;
2596 mac = fr_cb(fp)->granted_mac;
2597 /* pre-FIP */
2598 if (is_zero_ether_addr(mac))
2599 fcoe_ctlr_recv_flogi(fip, lport, fp);
2600 if (!is_zero_ether_addr(mac))
2601 fcoe_update_src_mac(lport, mac);
2602 done:
2603 fc_lport_flogi_resp(seq, fp, lport);
2607 * fcoe_logo_resp() - FCoE specific LOGO response handler
2608 * @seq: active sequence in the LOGO exchange
2609 * @fp: response frame, or error encoded in a pointer (timeout)
2610 * @arg: pointer to the fcoe_ctlr structure
2612 * This handles MAC address management for FCoE, then passes control on to
2613 * the libfc LOGO response handler.
2615 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2617 struct fc_lport *lport = arg;
2618 static u8 zero_mac[ETH_ALEN] = { 0 };
2620 if (!IS_ERR(fp))
2621 fcoe_update_src_mac(lport, zero_mac);
2622 fc_lport_logo_resp(seq, fp, lport);
2626 * fcoe_elsct_send - FCoE specific ELS handler
2628 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2629 * using FCoE specific response handlers and passing the FIP controller as
2630 * the argument (the lport is still available from the exchange).
2632 * Most of the work here is just handed off to the libfc routine.
2634 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2635 struct fc_frame *fp, unsigned int op,
2636 void (*resp)(struct fc_seq *,
2637 struct fc_frame *,
2638 void *),
2639 void *arg, u32 timeout)
2641 struct fcoe_port *port = lport_priv(lport);
2642 struct fcoe_interface *fcoe = port->priv;
2643 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
2644 struct fc_frame_header *fh = fc_frame_header_get(fp);
2646 switch (op) {
2647 case ELS_FLOGI:
2648 case ELS_FDISC:
2649 if (lport->point_to_multipoint)
2650 break;
2651 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2652 fip, timeout);
2653 case ELS_LOGO:
2654 /* only hook onto fabric logouts, not port logouts */
2655 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2656 break;
2657 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2658 lport, timeout);
2660 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2664 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2665 * @vport: fc_vport object to create a new fc_host for
2666 * @disabled: start the new fc_host in a disabled state by default?
2668 * Returns: 0 for success
2670 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2672 struct Scsi_Host *shost = vport_to_shost(vport);
2673 struct fc_lport *n_port = shost_priv(shost);
2674 struct fcoe_port *port = lport_priv(n_port);
2675 struct fcoe_interface *fcoe = port->priv;
2676 struct net_device *netdev = fcoe->netdev;
2677 struct fc_lport *vn_port;
2678 int rc;
2679 char buf[32];
2681 rc = fcoe_validate_vport_create(vport);
2682 if (rc) {
2683 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2684 printk(KERN_ERR "fcoe: Failed to create vport, "
2685 "WWPN (0x%s) already exists\n",
2686 buf);
2687 return rc;
2690 mutex_lock(&fcoe_config_mutex);
2691 rtnl_lock();
2692 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2693 rtnl_unlock();
2694 mutex_unlock(&fcoe_config_mutex);
2696 if (IS_ERR(vn_port)) {
2697 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2698 netdev->name);
2699 return -EIO;
2702 if (disabled) {
2703 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2704 } else {
2705 vn_port->boot_time = jiffies;
2706 fc_fabric_login(vn_port);
2707 fc_vport_setlink(vn_port);
2709 return 0;
2713 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2714 * @vport: fc_vport object that is being destroyed
2716 * Returns: 0 for success
2718 static int fcoe_vport_destroy(struct fc_vport *vport)
2720 struct Scsi_Host *shost = vport_to_shost(vport);
2721 struct fc_lport *n_port = shost_priv(shost);
2722 struct fc_lport *vn_port = vport->dd_data;
2724 mutex_lock(&n_port->lp_mutex);
2725 list_del(&vn_port->list);
2726 mutex_unlock(&n_port->lp_mutex);
2728 mutex_lock(&fcoe_config_mutex);
2729 rtnl_lock();
2730 fcoe_if_destroy(vn_port);
2731 rtnl_unlock();
2732 mutex_unlock(&fcoe_config_mutex);
2734 return 0;
2738 * fcoe_vport_remove() - remove attached vports
2739 * @lport: lport for which the vports should be removed
2741 static void fcoe_vport_remove(struct fc_lport *lport)
2743 struct Scsi_Host *shost;
2744 struct fc_host_attrs *fc_host;
2745 unsigned long flags;
2746 struct fc_vport *vport;
2747 struct fc_vport *next_vport;
2749 shost = lport->host;
2750 fc_host = shost_to_fc_host(shost);
2752 /* Loop through all the vports and mark them for deletion */
2753 spin_lock_irqsave(shost->host_lock, flags);
2754 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2755 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2756 continue;
2757 } else {
2758 vport->flags |= FC_VPORT_DELETING;
2759 queue_work(fc_host_work_q(shost),
2760 &vport->vport_delete_work);
2763 spin_unlock_irqrestore(shost->host_lock, flags);
2765 flush_workqueue(fc_host_work_q(shost));
2769 * fcoe_vport_disable() - change vport state
2770 * @vport: vport to bring online/offline
2771 * @disable: should the vport be disabled?
2773 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2775 struct fc_lport *lport = vport->dd_data;
2777 if (disable) {
2778 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2779 fc_fabric_logoff(lport);
2780 } else {
2781 lport->boot_time = jiffies;
2782 fc_fabric_login(lport);
2783 fc_vport_setlink(lport);
2786 return 0;
2790 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2791 * @vport: fc_vport with a new symbolic name string
2793 * After generating a new symbolic name string, a new RSPN_ID request is
2794 * sent to the name server. There is no response handler, so if it fails
2795 * for some reason it will not be retried.
2797 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2799 struct fc_lport *lport = vport->dd_data;
2800 struct fc_frame *fp;
2801 size_t len;
2803 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2804 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2805 fcoe_netdev(lport)->name, vport->symbolic_name);
2807 if (lport->state != LPORT_ST_READY)
2808 return;
2810 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2811 fp = fc_frame_alloc(lport,
2812 sizeof(struct fc_ct_hdr) +
2813 sizeof(struct fc_ns_rspn) + len);
2814 if (!fp)
2815 return;
2816 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2817 NULL, NULL, 3 * lport->r_a_tov);
2820 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2822 struct fcoe_ctlr_device *ctlr_dev =
2823 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2824 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2825 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2827 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2831 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2832 * @lport: the local port
2833 * @port_id: the port ID
2834 * @fp: the received frame, if any, that caused the port_id to be set.
2836 * This routine handles the case where we received a FLOGI and are
2837 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2838 * so it can set the non-mapped mode and gateway address.
2840 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2842 static void fcoe_set_port_id(struct fc_lport *lport,
2843 u32 port_id, struct fc_frame *fp)
2845 struct fcoe_port *port = lport_priv(lport);
2846 struct fcoe_interface *fcoe = port->priv;
2847 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2849 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2850 fcoe_ctlr_recv_flogi(ctlr, lport, fp);