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/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>
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>
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;
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 *,
113 static int fcoe_ddp_done(struct fc_lport *, u16);
114 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
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 *,
133 void (*resp)(struct fc_seq *,
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 *);
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,
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");
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;
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);
343 /* setup Source Mac Address */
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);
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);
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);
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;
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);
408 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
409 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
412 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
413 fcoe = ERR_PTR(-ENOMEM);
417 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
418 ctlr->cdev = ctlr_dev;
419 fcoe = fcoe_ctlr_priv(ctlr);
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);
433 fcoe_ctlr_destroy(ctlr);
434 fcoe_ctlr_device_delete(ctlr_dev);
443 module_put(THIS_MODULE);
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);
473 /* Delete secondary MAC addresses */
474 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
475 dev_uc_del(netdev, flogi_maddr);
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);
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");
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);
506 fcoe_interface_remove(fcoe);
509 /* Release the self-reference taken during fcoe_interface_create() */
510 /* tear-down the FCoE controller */
511 fcoe_ctlr_destroy(fip);
512 scsi_host_put(fip->lp->host);
514 module_put(THIS_MODULE);
518 * fcoe_fip_recv() - Handler for received FIP frames
519 * @skb: The receive skb
520 * @netdev: The associated net device
521 * @ptype: The packet_type structure which was used to register this handler
522 * @orig_dev: The original net_device the the skb was received on.
523 * (in case dev is a bond)
525 * Returns: 0 for success
527 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
528 struct packet_type *ptype,
529 struct net_device *orig_dev)
531 struct fcoe_interface *fcoe;
532 struct fcoe_ctlr *ctlr;
534 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
535 ctlr = fcoe_to_ctlr(fcoe);
536 fcoe_ctlr_recv(ctlr, skb);
541 * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames
542 * @skb: The receive skb
543 * @netdev: The associated net device
544 * @ptype: The packet_type structure which was used to register this handler
545 * @orig_dev: The original net_device the the skb was received on.
546 * (in case dev is a bond)
548 * Returns: 0 for success
550 static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev,
551 struct packet_type *ptype,
552 struct net_device *orig_dev)
554 struct fcoe_interface *fcoe;
555 struct fcoe_ctlr *ctlr;
557 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type);
558 ctlr = fcoe_to_ctlr(fcoe);
559 fcoe_ctlr_recv(ctlr, skb);
564 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
565 * @port: The FCoE port
566 * @skb: The FIP/FCoE packet to be sent
568 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
570 if (port->fcoe_pending_queue.qlen)
571 fcoe_check_wait_queue(port->lport, skb);
572 else if (fcoe_start_io(skb))
573 fcoe_check_wait_queue(port->lport, skb);
577 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
578 * @fip: The FCoE controller
579 * @skb: The FIP packet to be sent
581 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
583 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip);
586 struct fip_header fip;
590 * Use default VLAN for FIP VLAN discovery protocol
592 frame = (struct fip_frame *)skb->data;
593 if (ntohs(frame->eth.h_proto) == ETH_P_FIP &&
594 ntohs(frame->fip.fip_op) == FIP_OP_VLAN &&
595 fcoe->realdev != fcoe->netdev)
596 skb->dev = fcoe->realdev;
598 skb->dev = fcoe->netdev;
599 fcoe_port_send(lport_priv(fip->lp), skb);
603 * fcoe_update_src_mac() - Update the Ethernet MAC filters
604 * @lport: The local port to update the source MAC on
605 * @addr: Unicast MAC address to add
607 * Remove any previously-set unicast MAC filter.
608 * Add secondary FCoE MAC address filter for our OUI.
610 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
612 struct fcoe_port *port = lport_priv(lport);
613 struct fcoe_interface *fcoe = port->priv;
615 if (!is_zero_ether_addr(port->data_src_addr))
616 dev_uc_del(fcoe->netdev, port->data_src_addr);
617 if (!is_zero_ether_addr(addr))
618 dev_uc_add(fcoe->netdev, addr);
619 memcpy(port->data_src_addr, addr, ETH_ALEN);
623 * fcoe_get_src_mac() - return the Ethernet source address for an lport
624 * @lport: libfc lport
626 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
628 struct fcoe_port *port = lport_priv(lport);
630 return port->data_src_addr;
634 * fcoe_lport_config() - Set up a local port
635 * @lport: The local port to be setup
637 * Returns: 0 for success
639 static int fcoe_lport_config(struct fc_lport *lport)
643 lport->max_retry_count = 3;
644 lport->max_rport_retry_count = 3;
645 lport->e_d_tov = fcoe_e_d_tov;
646 lport->r_a_tov = fcoe_r_a_tov;
647 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
648 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
649 lport->does_npiv = 1;
651 fc_lport_init_stats(lport);
653 /* lport fc_lport related configuration */
654 fc_lport_config(lport);
656 /* offload related configuration */
657 lport->crc_offload = 0;
658 lport->seq_offload = 0;
659 lport->lro_enabled = 0;
667 * fcoe_netdev_features_change - Updates the lport's offload flags based
668 * on the LLD netdev's FCoE feature flags
670 static void fcoe_netdev_features_change(struct fc_lport *lport,
671 struct net_device *netdev)
673 mutex_lock(&lport->lp_mutex);
675 if (netdev->features & NETIF_F_SG)
680 if (netdev->features & NETIF_F_FCOE_CRC) {
681 lport->crc_offload = 1;
682 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
684 lport->crc_offload = 0;
687 if (netdev->features & NETIF_F_FSO) {
688 lport->seq_offload = 1;
689 lport->lso_max = netdev->gso_max_size;
690 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
693 lport->seq_offload = 0;
697 if (netdev->fcoe_ddp_xid) {
698 lport->lro_enabled = 1;
699 lport->lro_xid = netdev->fcoe_ddp_xid;
700 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
703 lport->lro_enabled = 0;
707 mutex_unlock(&lport->lp_mutex);
711 * fcoe_netdev_config() - Set up net devive for SW FCoE
712 * @lport: The local port that is associated with the net device
713 * @netdev: The associated net device
715 * Must be called after fcoe_lport_config() as it will use local port mutex
717 * Returns: 0 for success
719 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
723 struct fcoe_interface *fcoe;
724 struct fcoe_ctlr *ctlr;
725 struct fcoe_port *port;
727 /* Setup lport private data to point to fcoe softc */
728 port = lport_priv(lport);
730 ctlr = fcoe_to_ctlr(fcoe);
732 /* Figure out the VLAN ID, if any */
733 if (is_vlan_dev(netdev))
734 lport->vlan = vlan_dev_vlan_id(netdev);
739 * Determine max frame size based on underlying device and optional
740 * user-configured limit. If the MFS is too low, fcoe_link_ok()
741 * will return 0, so do this first.
744 if (netdev->features & NETIF_F_FCOE_MTU) {
746 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
748 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
749 if (fc_set_mfs(lport, mfs))
752 /* offload features support */
753 fcoe_netdev_features_change(lport, netdev);
755 skb_queue_head_init(&port->fcoe_pending_queue);
756 port->fcoe_pending_queue_active = 0;
757 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
759 fcoe_link_speed_update(lport);
762 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
763 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
764 fc_set_wwnn(lport, wwnn);
765 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
766 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
768 fc_set_wwpn(lport, wwpn);
775 * fcoe_shost_config() - Set up the SCSI host associated with a local port
776 * @lport: The local port
777 * @dev: The device associated with the SCSI host
779 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
781 * Returns: 0 for success
783 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
787 /* lport scsi host config */
788 lport->host->max_lun = FCOE_MAX_LUN;
789 lport->host->max_id = FCOE_MAX_FCP_TARGET;
790 lport->host->max_channel = 0;
791 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
794 lport->host->transportt = fcoe_vport_scsi_transport;
796 lport->host->transportt = fcoe_nport_scsi_transport;
798 /* add the new host to the SCSI-ml */
799 rc = scsi_add_host(lport->host, dev);
801 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
802 "error on scsi_add_host\n");
807 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
809 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
810 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
811 fcoe_netdev(lport)->name);
818 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
819 * @lport: The local port that is associated with the net device
820 * @netdev: The associated net device
822 * Must be called after fcoe_shost_config() as it will use local port mutex
825 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
827 struct fcoe_interface *fcoe;
828 struct fcoe_port *port;
829 struct net_device *realdev;
832 port = lport_priv(lport);
834 realdev = fcoe->realdev;
836 /* No FDMI state m/c for NPIV ports */
840 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
841 struct netdev_fcoe_hbainfo *fdmi;
842 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
846 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
849 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
850 "information from netdev.\n");
854 snprintf(fc_host_serial_number(lport->host),
855 FC_SERIAL_NUMBER_SIZE,
857 fdmi->serial_number);
858 snprintf(fc_host_manufacturer(lport->host),
859 FC_SERIAL_NUMBER_SIZE,
862 snprintf(fc_host_model(lport->host),
863 FC_SYMBOLIC_NAME_SIZE,
866 snprintf(fc_host_model_description(lport->host),
867 FC_SYMBOLIC_NAME_SIZE,
869 fdmi->model_description);
870 snprintf(fc_host_hardware_version(lport->host),
871 FC_VERSION_STRING_SIZE,
873 fdmi->hardware_version);
874 snprintf(fc_host_driver_version(lport->host),
875 FC_VERSION_STRING_SIZE,
877 fdmi->driver_version);
878 snprintf(fc_host_optionrom_version(lport->host),
879 FC_VERSION_STRING_SIZE,
881 fdmi->optionrom_version);
882 snprintf(fc_host_firmware_version(lport->host),
883 FC_VERSION_STRING_SIZE,
885 fdmi->firmware_version);
887 /* Enable FDMI lport states */
888 lport->fdmi_enabled = 1;
891 lport->fdmi_enabled = 0;
892 printk(KERN_INFO "fcoe: No FDMI support.\n");
897 * fcoe_oem_match() - The match routine for the offloaded exchange manager
900 * This routine will be associated with an exchange manager (EM). When
901 * the libfc exchange handling code is looking for an EM to use it will
902 * call this routine and pass it the frame that it wishes to send. This
903 * routine will return True if the associated EM is to be used and False
904 * if the echange code should continue looking for an EM.
906 * The offload EM that this routine is associated with will handle any
907 * packets that are for SCSI read requests.
909 * This has been enhanced to work when FCoE stack is operating in target
912 * Returns: True for read types I/O, otherwise returns false.
914 static bool fcoe_oem_match(struct fc_frame *fp)
916 struct fc_frame_header *fh = fc_frame_header_get(fp);
917 struct fcp_cmnd *fcp;
919 if (fc_fcp_is_read(fr_fsp(fp)) &&
920 (fr_fsp(fp)->data_len > fcoe_ddp_min))
922 else if ((fr_fsp(fp) == NULL) &&
923 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
924 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
925 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
926 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
927 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
934 * fcoe_em_config() - Allocate and configure an exchange manager
935 * @lport: The local port that the new EM will be associated with
937 * Returns: 0 on success
939 static inline int fcoe_em_config(struct fc_lport *lport)
941 struct fcoe_port *port = lport_priv(lport);
942 struct fcoe_interface *fcoe = port->priv;
943 struct fcoe_interface *oldfcoe = NULL;
944 struct net_device *old_real_dev, *cur_real_dev;
945 u16 min_xid = FCOE_MIN_XID;
946 u16 max_xid = FCOE_MAX_XID;
949 * Check if need to allocate an em instance for
950 * offload exchange ids to be shared across all VN_PORTs/lport.
952 if (!lport->lro_enabled || !lport->lro_xid ||
953 (lport->lro_xid >= max_xid)) {
959 * Reuse existing offload em instance in case
960 * it is already allocated on real eth device
962 if (is_vlan_dev(fcoe->netdev))
963 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
965 cur_real_dev = fcoe->netdev;
967 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
968 if (is_vlan_dev(oldfcoe->netdev))
969 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
971 old_real_dev = oldfcoe->netdev;
973 if (cur_real_dev == old_real_dev) {
974 fcoe->oem = oldfcoe->oem;
980 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
981 printk(KERN_ERR "fcoe_em_config: failed to add "
982 "offload em:%p on interface:%s\n",
983 fcoe->oem, fcoe->netdev->name);
987 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
988 FCOE_MIN_XID, lport->lro_xid,
991 printk(KERN_ERR "fcoe_em_config: failed to allocate "
992 "em for offload exches on interface:%s\n",
999 * Exclude offload EM xid range from next EM xid range.
1001 min_xid += lport->lro_xid + 1;
1004 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
1005 printk(KERN_ERR "fcoe_em_config: failed to "
1006 "allocate em on interface %s\n", fcoe->netdev->name);
1014 * fcoe_if_destroy() - Tear down a SW FCoE instance
1015 * @lport: The local port to be destroyed
1018 static void fcoe_if_destroy(struct fc_lport *lport)
1020 struct fcoe_port *port = lport_priv(lport);
1021 struct fcoe_interface *fcoe = port->priv;
1022 struct net_device *netdev = fcoe->netdev;
1024 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
1026 /* Logout of the fabric */
1027 fc_fabric_logoff(lport);
1029 /* Cleanup the fc_lport */
1030 fc_lport_destroy(lport);
1032 /* Stop the transmit retry timer */
1033 del_timer_sync(&port->timer);
1035 /* Free existing transmit skbs */
1036 fcoe_clean_pending_queue(lport);
1039 if (!is_zero_ether_addr(port->data_src_addr))
1040 dev_uc_del(netdev, port->data_src_addr);
1044 fcoe_interface_remove(fcoe);
1047 /* Free queued packets for the per-CPU receive threads */
1048 fcoe_percpu_clean(lport);
1050 /* Detach from the scsi-ml */
1051 fc_remove_host(lport->host);
1052 scsi_remove_host(lport->host);
1054 /* Destroy lport scsi_priv */
1055 fc_fcp_destroy(lport);
1057 /* There are no more rports or I/O, free the EM */
1058 fc_exch_mgr_free(lport);
1060 /* Free memory used by statistical counters */
1061 fc_lport_free_stats(lport);
1064 * Release the Scsi_Host for vport but hold on to
1065 * master lport until it fcoe interface fully cleaned-up.
1068 scsi_host_put(lport->host);
1072 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1073 * @lport: The local port to setup DDP for
1074 * @xid: The exchange ID for this DDP transfer
1075 * @sgl: The scatterlist describing this transfer
1076 * @sgc: The number of sg items
1078 * Returns: 0 if the DDP context was not configured
1080 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1081 struct scatterlist *sgl, unsigned int sgc)
1083 struct net_device *netdev = fcoe_netdev(lport);
1085 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1086 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1094 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1095 * @lport: The local port to setup DDP for
1096 * @xid: The exchange ID for this DDP transfer
1097 * @sgl: The scatterlist describing this transfer
1098 * @sgc: The number of sg items
1100 * Returns: 0 if the DDP context was not configured
1102 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1103 struct scatterlist *sgl, unsigned int sgc)
1105 struct net_device *netdev = fcoe_netdev(lport);
1107 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1108 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1116 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1117 * @lport: The local port to complete DDP on
1118 * @xid: The exchange ID for this DDP transfer
1120 * Returns: the length of data that have been completed by DDP
1122 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1124 struct net_device *netdev = fcoe_netdev(lport);
1126 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1127 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1132 * fcoe_if_create() - Create a FCoE instance on an interface
1133 * @fcoe: The FCoE interface to create a local port on
1134 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1135 * @npiv: Indicates if the port is a vport or not
1137 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1139 * Returns: The allocated fc_lport or an error pointer
1141 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1142 struct device *parent, int npiv)
1144 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1145 struct net_device *netdev = fcoe->netdev;
1146 struct fc_lport *lport, *n_port;
1147 struct fcoe_port *port;
1148 struct Scsi_Host *shost;
1151 * parent is only a vport if npiv is 1,
1152 * but we'll only use vport in that case so go ahead and set it
1154 struct fc_vport *vport = dev_to_vport(parent);
1156 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1159 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1161 lport = libfc_vport_create(vport, sizeof(*port));
1164 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1168 port = lport_priv(lport);
1169 port->lport = lport;
1171 port->get_netdev = fcoe_netdev;
1172 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1173 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1174 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1177 * Need to add the lport to the hostlist
1178 * so we catch NETDEV_CHANGE events.
1180 fcoe_hostlist_add(lport);
1182 /* configure a fc_lport including the exchange manager */
1183 rc = fcoe_lport_config(lport);
1185 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1191 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1192 "%16.16llx %16.16llx\n",
1193 vport->node_name, vport->port_name);
1194 fc_set_wwnn(lport, vport->node_name);
1195 fc_set_wwpn(lport, vport->port_name);
1198 /* configure lport network properties */
1199 rc = fcoe_netdev_config(lport, netdev);
1201 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1203 goto out_lp_destroy;
1206 /* configure lport scsi host properties */
1207 rc = fcoe_shost_config(lport, parent);
1209 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1211 goto out_lp_destroy;
1214 /* Initialize the library */
1215 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
1217 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1219 goto out_lp_destroy;
1222 /* Initialized FDMI information */
1223 fcoe_fdmi_info(lport, netdev);
1226 * fcoe_em_alloc() and fcoe_hostlist_add() both
1227 * need to be atomic with respect to other changes to the
1228 * hostlist since fcoe_em_alloc() looks for an existing EM
1229 * instance on host list updated by fcoe_hostlist_add().
1231 * This is currently handled through the fcoe_config_mutex
1235 /* lport exch manager allocation */
1236 rc = fcoe_em_config(lport);
1238 shost = vport_to_shost(vport);
1239 n_port = shost_priv(shost);
1240 rc = fc_exch_mgr_list_clone(n_port, lport);
1244 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1245 goto out_lp_destroy;
1251 fc_exch_mgr_free(lport);
1253 fcoe_hostlist_del(lport);
1254 scsi_host_put(lport->host);
1260 * fcoe_if_init() - Initialization routine for fcoe.ko
1262 * Attaches the SW FCoE transport to the FC transport
1264 * Returns: 0 on success
1266 static int __init fcoe_if_init(void)
1268 /* attach to scsi transport */
1269 fcoe_nport_scsi_transport =
1270 fc_attach_transport(&fcoe_nport_fc_functions);
1271 fcoe_vport_scsi_transport =
1272 fc_attach_transport(&fcoe_vport_fc_functions);
1274 if (!fcoe_nport_scsi_transport) {
1275 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1283 * fcoe_if_exit() - Tear down fcoe.ko
1285 * Detaches the SW FCoE transport from the FC transport
1287 * Returns: 0 on success
1289 static int __exit fcoe_if_exit(void)
1291 fc_release_transport(fcoe_nport_scsi_transport);
1292 fc_release_transport(fcoe_vport_scsi_transport);
1293 fcoe_nport_scsi_transport = NULL;
1294 fcoe_vport_scsi_transport = NULL;
1298 static void fcoe_thread_cleanup_local(unsigned int cpu)
1300 struct page *crc_eof;
1301 struct fcoe_percpu_s *p;
1303 p = per_cpu_ptr(&fcoe_percpu, cpu);
1304 spin_lock_bh(&p->fcoe_rx_list.lock);
1305 crc_eof = p->crc_eof_page;
1306 p->crc_eof_page = NULL;
1307 p->crc_eof_offset = 0;
1308 spin_unlock_bh(&p->fcoe_rx_list.lock);
1312 flush_work(&p->work);
1316 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1319 * This routine selects next CPU based on cpumask to distribute
1320 * incoming requests in round robin.
1322 * Returns: int CPU number
1324 static inline unsigned int fcoe_select_cpu(void)
1326 static unsigned int selected_cpu;
1328 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1329 if (selected_cpu >= nr_cpu_ids)
1330 selected_cpu = cpumask_first(cpu_online_mask);
1332 return selected_cpu;
1336 * fcoe_rcv() - Receive packets from a net device
1337 * @skb: The received packet
1338 * @netdev: The net device that the packet was received on
1339 * @ptype: The packet type context
1340 * @olddev: The last device net device
1342 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1343 * FC frame and passes the frame to libfc.
1345 * Returns: 0 for success
1347 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1348 struct packet_type *ptype, struct net_device *olddev)
1350 struct fc_lport *lport;
1351 struct fcoe_rcv_info *fr;
1352 struct fcoe_ctlr *ctlr;
1353 struct fcoe_interface *fcoe;
1354 struct fc_frame_header *fh;
1355 struct fcoe_percpu_s *fps;
1359 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1360 ctlr = fcoe_to_ctlr(fcoe);
1362 if (unlikely(!lport)) {
1363 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
1366 if (!lport->link_up)
1369 FCOE_NETDEV_DBG(netdev,
1370 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1371 skb->len, skb->data_len, skb->head, skb->data,
1372 skb_tail_pointer(skb), skb_end_pointer(skb),
1373 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1376 skb = skb_share_check(skb, GFP_ATOMIC);
1383 if (is_fip_mode(ctlr) &&
1384 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
1385 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1391 * Check for minimum frame length, and make sure required FCoE
1392 * and FC headers are pulled into the linear data area.
1394 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1395 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1398 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1399 fh = (struct fc_frame_header *) skb_transport_header(skb);
1401 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1402 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1407 fr = fcoe_dev_from_skb(skb);
1411 * In case the incoming frame's exchange is originated from
1412 * the initiator, then received frame's exchange id is ANDed
1413 * with fc_cpu_mask bits to get the same cpu on which exchange
1414 * was originated, otherwise select cpu using rx exchange id
1415 * or fcoe_select_cpu().
1417 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1418 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1420 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1421 cpu = fcoe_select_cpu();
1423 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1426 if (cpu >= nr_cpu_ids)
1429 fps = &per_cpu(fcoe_percpu, cpu);
1430 spin_lock(&fps->fcoe_rx_list.lock);
1432 * We now have a valid CPU that we're targeting for
1433 * this skb. We also have this receive thread locked,
1434 * so we're free to queue skbs into it's queue.
1438 * Note: We used to have a set of conditions under which we would
1439 * call fcoe_recv_frame directly, rather than queuing to the rx list
1440 * as it could save a few cycles, but doing so is prohibited, as
1441 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1442 * in softirq context.
1444 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1445 schedule_work_on(cpu, &fps->work);
1446 spin_unlock(&fps->fcoe_rx_list.lock);
1448 return NET_RX_SUCCESS;
1450 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
1458 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1459 * @skb: The packet to be transmitted
1460 * @tlen: The total length of the trailer
1462 * Returns: 0 for success
1464 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1466 struct fcoe_percpu_s *fps;
1469 fps = &get_cpu_var(fcoe_percpu);
1470 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1471 put_cpu_var(fcoe_percpu);
1477 * fcoe_xmit() - Transmit a FCoE frame
1478 * @lport: The local port that the frame is to be transmitted for
1479 * @fp: The frame to be transmitted
1481 * Return: 0 for success
1483 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1488 struct fcoe_crc_eof *cp;
1489 struct sk_buff *skb;
1490 struct fc_stats *stats;
1491 struct fc_frame_header *fh;
1492 unsigned int hlen; /* header length implies the version */
1493 unsigned int tlen; /* trailer length */
1494 unsigned int elen; /* eth header, may include vlan */
1495 struct fcoe_port *port = lport_priv(lport);
1496 struct fcoe_interface *fcoe = port->priv;
1497 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1499 struct fcoe_hdr *hp;
1501 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1503 fh = fc_frame_header_get(fp);
1505 wlen = skb->len / FCOE_WORD_TO_BYTE;
1507 if (!lport->link_up) {
1512 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1513 fcoe_ctlr_els_send(ctlr, lport, skb))
1519 elen = sizeof(struct ethhdr);
1520 hlen = sizeof(struct fcoe_hdr);
1521 tlen = sizeof(struct fcoe_crc_eof);
1522 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1525 if (likely(lport->crc_offload)) {
1526 skb->ip_summed = CHECKSUM_PARTIAL;
1527 skb->csum_start = skb_headroom(skb);
1528 skb->csum_offset = skb->len;
1531 skb->ip_summed = CHECKSUM_NONE;
1532 crc = fcoe_fc_crc(fp);
1535 /* copy port crc and eof to the skb buff */
1536 if (skb_is_nonlinear(skb)) {
1538 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1542 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1543 cp = kmap_atomic(skb_frag_page(frag))
1544 + frag->page_offset;
1546 cp = skb_put(skb, tlen);
1549 memset(cp, 0, sizeof(*cp));
1551 cp->fcoe_crc32 = cpu_to_le32(~crc);
1553 if (skb_is_nonlinear(skb)) {
1558 /* adjust skb network/transport offsets to match mac/fcoe/port */
1559 skb_push(skb, elen + hlen);
1560 skb_reset_mac_header(skb);
1561 skb_reset_network_header(skb);
1562 skb->mac_len = elen;
1563 skb->protocol = htons(ETH_P_FCOE);
1564 skb->priority = fcoe->priority;
1566 if (is_vlan_dev(fcoe->netdev) &&
1567 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
1568 /* must set skb->dev before calling vlan_put_tag */
1569 skb->dev = fcoe->realdev;
1570 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1571 vlan_dev_vlan_id(fcoe->netdev));
1573 skb->dev = fcoe->netdev;
1575 /* fill up mac and fcoe headers */
1577 eh->h_proto = htons(ETH_P_FCOE);
1578 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1580 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1582 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1583 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
1585 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1587 hp = (struct fcoe_hdr *)(eh + 1);
1588 memset(hp, 0, sizeof(*hp));
1590 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1593 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1594 if (lport->seq_offload && fr_max_payload(fp)) {
1595 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1596 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1598 skb_shinfo(skb)->gso_type = 0;
1599 skb_shinfo(skb)->gso_size = 0;
1601 /* update tx stats: regardless if LLD fails */
1602 stats = per_cpu_ptr(lport->stats, get_cpu());
1604 stats->TxWords += wlen;
1607 /* send down to lld */
1609 fcoe_port_send(port, skb);
1614 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1615 * @lport: The local port the frame was received on
1616 * @fp: The received frame
1618 * Return: 0 on passing filtering checks
1620 static inline int fcoe_filter_frames(struct fc_lport *lport,
1621 struct fc_frame *fp)
1623 struct fcoe_ctlr *ctlr;
1624 struct fcoe_interface *fcoe;
1625 struct fc_frame_header *fh;
1626 struct sk_buff *skb = (struct sk_buff *)fp;
1627 struct fc_stats *stats;
1630 * We only check CRC if no offload is available and if it is
1631 * it's solicited data, in which case, the FCP layer would
1632 * check it during the copy.
1634 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1635 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1637 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1639 fh = (struct fc_frame_header *) skb_transport_header(skb);
1640 fh = fc_frame_header_get(fp);
1641 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1644 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1645 ctlr = fcoe_to_ctlr(fcoe);
1646 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1647 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1648 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1652 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1653 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1654 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1658 stats = per_cpu_ptr(lport->stats, get_cpu());
1659 stats->InvalidCRCCount++;
1660 if (stats->InvalidCRCCount < 5)
1661 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1667 * fcoe_recv_frame() - process a single received frame
1668 * @skb: frame to process
1670 static void fcoe_recv_frame(struct sk_buff *skb)
1673 struct fc_lport *lport;
1674 struct fcoe_rcv_info *fr;
1675 struct fc_stats *stats;
1676 struct fcoe_crc_eof crc_eof;
1677 struct fc_frame *fp;
1678 struct fcoe_port *port;
1679 struct fcoe_hdr *hp;
1681 fr = fcoe_dev_from_skb(skb);
1683 if (unlikely(!lport)) {
1684 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
1689 FCOE_NETDEV_DBG(skb->dev,
1690 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1691 skb->len, skb->data_len,
1692 skb->head, skb->data, skb_tail_pointer(skb),
1693 skb_end_pointer(skb), skb->csum,
1694 skb->dev ? skb->dev->name : "<NULL>");
1696 port = lport_priv(lport);
1697 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
1700 * Frame length checks and setting up the header pointers
1701 * was done in fcoe_rcv already.
1703 hp = (struct fcoe_hdr *) skb_network_header(skb);
1705 stats = per_cpu_ptr(lport->stats, get_cpu());
1706 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1707 if (stats->ErrorFrames < 5)
1708 printk(KERN_WARNING "fcoe: FCoE version "
1709 "mismatch: The frame has "
1710 "version %x, but the "
1711 "initiator supports version "
1712 "%x\n", FC_FCOE_DECAPS_VER(hp),
1717 skb_pull(skb, sizeof(struct fcoe_hdr));
1718 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1721 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1723 fp = (struct fc_frame *)skb;
1726 fr_sof(fp) = hp->fcoe_sof;
1728 /* Copy out the CRC and EOF trailer for access */
1729 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1731 fr_eof(fp) = crc_eof.fcoe_eof;
1732 fr_crc(fp) = crc_eof.fcoe_crc32;
1733 if (pskb_trim(skb, fr_len))
1736 if (!fcoe_filter_frames(lport, fp)) {
1738 fc_exch_recv(lport, fp);
1742 stats->ErrorFrames++;
1748 * fcoe_receive_work() - The per-CPU worker
1749 * @work: The work struct
1752 static void fcoe_receive_work(struct work_struct *work)
1754 struct fcoe_percpu_s *p;
1755 struct sk_buff *skb;
1756 struct sk_buff_head tmp;
1758 p = container_of(work, struct fcoe_percpu_s, work);
1759 skb_queue_head_init(&tmp);
1761 spin_lock_bh(&p->fcoe_rx_list.lock);
1762 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1763 spin_unlock_bh(&p->fcoe_rx_list.lock);
1765 if (!skb_queue_len(&tmp))
1768 while ((skb = __skb_dequeue(&tmp)))
1769 fcoe_recv_frame(skb);
1773 * fcoe_dev_setup() - Setup the link change notification interface
1775 static void fcoe_dev_setup(void)
1777 register_dcbevent_notifier(&dcb_notifier);
1778 register_netdevice_notifier(&fcoe_notifier);
1782 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1784 static void fcoe_dev_cleanup(void)
1786 unregister_dcbevent_notifier(&dcb_notifier);
1787 unregister_netdevice_notifier(&fcoe_notifier);
1790 static struct fcoe_interface *
1791 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1793 struct fcoe_interface *fcoe;
1794 struct net_device *real_dev;
1796 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1797 if (is_vlan_dev(fcoe->netdev))
1798 real_dev = vlan_dev_real_dev(fcoe->netdev);
1800 real_dev = fcoe->netdev;
1802 if (netdev == real_dev)
1808 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1809 ulong event, void *ptr)
1811 struct dcb_app_type *entry = ptr;
1812 struct fcoe_ctlr *ctlr;
1813 struct fcoe_interface *fcoe;
1814 struct net_device *netdev;
1817 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1820 netdev = dev_get_by_index(&init_net, entry->ifindex);
1824 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1829 ctlr = fcoe_to_ctlr(fcoe);
1831 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1832 prio = ffs(entry->app.priority) - 1;
1834 prio = entry->app.priority;
1839 if (entry->app.protocol == ETH_P_FIP ||
1840 entry->app.protocol == ETH_P_FCOE)
1841 ctlr->priority = prio;
1843 if (entry->app.protocol == ETH_P_FCOE)
1844 fcoe->priority = prio;
1850 * fcoe_device_notification() - Handler for net device events
1851 * @notifier: The context of the notification
1852 * @event: The type of event
1853 * @ptr: The net device that the event was on
1855 * This function is called by the Ethernet driver in case of link change event.
1857 * Returns: 0 for success
1859 static int fcoe_device_notification(struct notifier_block *notifier,
1860 ulong event, void *ptr)
1862 struct fcoe_ctlr_device *cdev;
1863 struct fc_lport *lport = NULL;
1864 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1865 struct fcoe_ctlr *ctlr;
1866 struct fcoe_interface *fcoe;
1867 struct fcoe_port *port;
1868 struct fc_stats *stats;
1869 u32 link_possible = 1;
1873 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1874 if (fcoe->netdev == netdev) {
1875 ctlr = fcoe_to_ctlr(fcoe);
1887 case NETDEV_GOING_DOWN:
1893 case NETDEV_CHANGEMTU:
1894 if (netdev->features & NETIF_F_FCOE_MTU)
1896 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1897 sizeof(struct fcoe_crc_eof));
1898 if (mfs >= FC_MIN_MAX_FRAME)
1899 fc_set_mfs(lport, mfs);
1901 case NETDEV_REGISTER:
1903 case NETDEV_UNREGISTER:
1904 list_del(&fcoe->list);
1905 port = lport_priv(ctlr->lp);
1906 queue_work(fcoe_wq, &port->destroy_work);
1909 case NETDEV_FEAT_CHANGE:
1910 fcoe_netdev_features_change(lport, netdev);
1913 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1914 "from netdev netlink\n", event);
1917 fcoe_link_speed_update(lport);
1919 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
1921 if (link_possible && !fcoe_link_ok(lport)) {
1922 switch (cdev->enabled) {
1923 case FCOE_CTLR_DISABLED:
1924 pr_info("Link up while interface is disabled.\n");
1926 case FCOE_CTLR_ENABLED:
1927 case FCOE_CTLR_UNUSED:
1928 fcoe_ctlr_link_up(ctlr);
1930 } else if (fcoe_ctlr_link_down(ctlr)) {
1931 switch (cdev->enabled) {
1932 case FCOE_CTLR_DISABLED:
1933 pr_info("Link down while interface is disabled.\n");
1935 case FCOE_CTLR_ENABLED:
1936 case FCOE_CTLR_UNUSED:
1937 stats = per_cpu_ptr(lport->stats, get_cpu());
1938 stats->LinkFailureCount++;
1940 fcoe_clean_pending_queue(lport);
1948 * fcoe_disable() - Disables a FCoE interface
1949 * @netdev : The net_device object the Ethernet interface to create on
1951 * Called from fcoe transport.
1953 * Returns: 0 for success
1955 * Deprecated: use fcoe_ctlr_enabled()
1957 static int fcoe_disable(struct net_device *netdev)
1959 struct fcoe_ctlr *ctlr;
1960 struct fcoe_interface *fcoe;
1963 mutex_lock(&fcoe_config_mutex);
1966 fcoe = fcoe_hostlist_lookup_port(netdev);
1970 ctlr = fcoe_to_ctlr(fcoe);
1971 fcoe_ctlr_link_down(ctlr);
1972 fcoe_clean_pending_queue(ctlr->lp);
1976 mutex_unlock(&fcoe_config_mutex);
1981 * fcoe_enable() - Enables a FCoE interface
1982 * @netdev : The net_device object the Ethernet interface to create on
1984 * Called from fcoe transport.
1986 * Returns: 0 for success
1988 static int fcoe_enable(struct net_device *netdev)
1990 struct fcoe_ctlr *ctlr;
1991 struct fcoe_interface *fcoe;
1994 mutex_lock(&fcoe_config_mutex);
1996 fcoe = fcoe_hostlist_lookup_port(netdev);
2004 ctlr = fcoe_to_ctlr(fcoe);
2006 if (!fcoe_link_ok(ctlr->lp))
2007 fcoe_ctlr_link_up(ctlr);
2010 mutex_unlock(&fcoe_config_mutex);
2015 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
2016 * @cdev: The FCoE Controller that is being enabled or disabled
2018 * fcoe_sysfs will ensure that the state of 'enabled' has
2019 * changed, so no checking is necessary here. This routine simply
2020 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
2021 * When those routines are removed the functionality can be merged
2024 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
2026 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
2027 struct fc_lport *lport = ctlr->lp;
2028 struct net_device *netdev = fcoe_netdev(lport);
2030 switch (cdev->enabled) {
2031 case FCOE_CTLR_ENABLED:
2032 return fcoe_enable(netdev);
2033 case FCOE_CTLR_DISABLED:
2034 return fcoe_disable(netdev);
2035 case FCOE_CTLR_UNUSED:
2042 * fcoe_ctlr_mode() - Switch FIP mode
2043 * @cdev: The FCoE Controller that is being modified
2045 * When the FIP mode has been changed we need to update
2046 * the multicast addresses to ensure we get the correct
2049 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev)
2051 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2052 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2054 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN &&
2055 ctlr->mode != FIP_MODE_VN2VN) {
2056 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS);
2057 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2058 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS);
2059 } else if (ctlr->mode != FIP_MODE_FABRIC) {
2060 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2061 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS);
2062 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS);
2064 fcoe_ctlr_set_fip_mode(ctlr_dev);
2068 * fcoe_destroy() - Destroy a FCoE interface
2069 * @netdev : The net_device object the Ethernet interface to create on
2071 * Called from fcoe transport
2073 * Returns: 0 for success
2075 static int fcoe_destroy(struct net_device *netdev)
2077 struct fcoe_ctlr *ctlr;
2078 struct fcoe_interface *fcoe;
2079 struct fc_lport *lport;
2080 struct fcoe_port *port;
2083 mutex_lock(&fcoe_config_mutex);
2085 fcoe = fcoe_hostlist_lookup_port(netdev);
2090 ctlr = fcoe_to_ctlr(fcoe);
2092 port = lport_priv(lport);
2093 list_del(&fcoe->list);
2094 queue_work(fcoe_wq, &port->destroy_work);
2097 mutex_unlock(&fcoe_config_mutex);
2102 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2103 * @work: Handle to the FCoE port to be destroyed
2105 static void fcoe_destroy_work(struct work_struct *work)
2107 struct fcoe_ctlr_device *cdev;
2108 struct fcoe_ctlr *ctlr;
2109 struct fcoe_port *port;
2110 struct fcoe_interface *fcoe;
2111 struct Scsi_Host *shost;
2112 struct fc_host_attrs *fc_host;
2113 unsigned long flags;
2114 struct fc_vport *vport;
2115 struct fc_vport *next_vport;
2117 port = container_of(work, struct fcoe_port, destroy_work);
2118 shost = port->lport->host;
2119 fc_host = shost_to_fc_host(shost);
2121 /* Loop through all the vports and mark them for deletion */
2122 spin_lock_irqsave(shost->host_lock, flags);
2123 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2124 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2127 vport->flags |= FC_VPORT_DELETING;
2128 queue_work(fc_host_work_q(shost),
2129 &vport->vport_delete_work);
2132 spin_unlock_irqrestore(shost->host_lock, flags);
2134 flush_workqueue(fc_host_work_q(shost));
2136 mutex_lock(&fcoe_config_mutex);
2139 ctlr = fcoe_to_ctlr(fcoe);
2140 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2142 fcoe_if_destroy(port->lport);
2143 fcoe_interface_cleanup(fcoe);
2145 mutex_unlock(&fcoe_config_mutex);
2147 fcoe_ctlr_device_delete(cdev);
2151 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2152 * @netdev : The net_device object the Ethernet interface to create on
2154 * Called from fcoe transport.
2156 * Returns: always returns true as this is the default FCoE transport,
2157 * i.e., support all netdevs.
2159 static bool fcoe_match(struct net_device *netdev)
2165 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2166 * @netdev: The net_device object of the L2 link that should be queried
2167 * @port: The fcoe_port to bind FCoE APP priority with
2170 static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2172 int ctlr_prio = TC_PRIO_BESTEFFORT;
2173 int fcoe_prio = TC_PRIO_INTERACTIVE;
2174 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2178 struct net_device *netdev = fcoe->realdev;
2179 struct dcb_app app = {
2181 .protocol = ETH_P_FCOE
2184 /* setup DCB priority attributes. */
2185 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2186 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2188 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2189 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2190 up = dcb_ieee_getapp_mask(netdev, &app);
2191 app.protocol = ETH_P_FIP;
2192 fup = dcb_ieee_getapp_mask(netdev, &app);
2194 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2195 up = dcb_getapp(netdev, &app);
2196 app.protocol = ETH_P_FIP;
2197 fup = dcb_getapp(netdev, &app);
2200 fcoe_prio = ffs(up) ? ffs(up) - 1 : 0;
2201 ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio;
2204 fcoe->priority = fcoe_prio;
2205 ctlr->priority = ctlr_prio;
2208 enum fcoe_create_link_state {
2209 FCOE_CREATE_LINK_DOWN,
2210 FCOE_CREATE_LINK_UP,
2214 * _fcoe_create() - (internal) Create a fcoe interface
2215 * @netdev : The net_device object the Ethernet interface to create on
2216 * @fip_mode: The FIP mode for this creation
2217 * @link_state: The ctlr link state on creation
2219 * Called from either the libfcoe 'create' module parameter
2220 * via fcoe_create or from fcoe_syfs's ctlr_create file.
2222 * libfcoe's 'create' module parameter is deprecated so some
2223 * consolidation of code can be done when that interface is
2226 static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode,
2227 enum fcoe_create_link_state link_state)
2230 struct fcoe_ctlr_device *ctlr_dev;
2231 struct fcoe_ctlr *ctlr;
2232 struct fcoe_interface *fcoe;
2233 struct fc_lport *lport;
2235 mutex_lock(&fcoe_config_mutex);
2238 /* look for existing lport */
2239 if (fcoe_hostlist_lookup(netdev)) {
2244 fcoe = fcoe_interface_create(netdev, fip_mode);
2250 ctlr = fcoe_to_ctlr(fcoe);
2251 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2252 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
2253 if (IS_ERR(lport)) {
2254 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2258 fcoe_interface_cleanup(fcoe);
2259 mutex_unlock(&fcoe_config_mutex);
2260 fcoe_ctlr_device_delete(ctlr_dev);
2264 /* Make this the "master" N_Port */
2267 /* setup DCB priority attributes. */
2268 fcoe_dcb_create(fcoe);
2270 /* start FIP Discovery and FLOGI */
2271 lport->boot_time = jiffies;
2272 fc_fabric_login(lport);
2275 * If the fcoe_ctlr_device is to be set to DISABLED
2276 * it must be done after the lport is added to the
2277 * hostlist, but before the rtnl_lock is released.
2278 * This is because the rtnl_lock protects the
2279 * hostlist that fcoe_device_notification uses. If
2280 * the FCoE Controller is intended to be created
2281 * DISABLED then 'enabled' needs to be considered
2282 * handling link events. 'enabled' must be set
2283 * before the lport can be found in the hostlist
2284 * when a link up event is received.
2286 if (link_state == FCOE_CREATE_LINK_UP)
2287 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2289 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2291 if (link_state == FCOE_CREATE_LINK_UP &&
2292 !fcoe_link_ok(lport)) {
2294 fcoe_ctlr_link_up(ctlr);
2295 mutex_unlock(&fcoe_config_mutex);
2301 mutex_unlock(&fcoe_config_mutex);
2307 * fcoe_create() - Create a fcoe interface
2308 * @netdev : The net_device object the Ethernet interface to create on
2309 * @fip_mode: The FIP mode for this creation
2311 * Called from fcoe transport
2313 * Returns: 0 for success
2315 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode)
2317 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2321 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2322 * @netdev: The net_device to be used by the allocated FCoE Controller
2324 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2325 * in a link_down state. The allows the user an opportunity to configure
2326 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2328 * Creating in with this routine starts the FCoE Controller in Fabric
2329 * mode. The user can change to VN2VN or another mode before enabling.
2331 static int fcoe_ctlr_alloc(struct net_device *netdev)
2333 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2334 FCOE_CREATE_LINK_DOWN);
2338 * fcoe_link_ok() - Check if the link is OK for a local port
2339 * @lport: The local port to check link on
2341 * Returns: 0 if link is UP and OK, -1 if not
2344 static int fcoe_link_ok(struct fc_lport *lport)
2346 struct net_device *netdev = fcoe_netdev(lport);
2348 if (netif_oper_up(netdev))
2354 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2355 * @lport: The local port whose skbs are to be cleared
2357 * Must be called with fcoe_create_mutex held to single-thread completion.
2359 * This flushes the pending skbs by flush the work item for each CPU. The work
2360 * item on each possible CPU is flushed because we may have used the per-CPU
2361 * struct of an offline CPU.
2363 static void fcoe_percpu_clean(struct fc_lport *lport)
2365 struct fcoe_percpu_s *pp;
2368 for_each_possible_cpu(cpu) {
2369 pp = &per_cpu(fcoe_percpu, cpu);
2371 flush_work(&pp->work);
2376 * fcoe_reset() - Reset a local port
2377 * @shost: The SCSI host associated with the local port to be reset
2379 * Returns: Always 0 (return value required by FC transport template)
2381 static int fcoe_reset(struct Scsi_Host *shost)
2383 struct fc_lport *lport = shost_priv(shost);
2384 struct fcoe_port *port = lport_priv(lport);
2385 struct fcoe_interface *fcoe = port->priv;
2386 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2387 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2389 fcoe_ctlr_link_down(ctlr);
2390 fcoe_clean_pending_queue(ctlr->lp);
2392 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2393 !fcoe_link_ok(ctlr->lp))
2394 fcoe_ctlr_link_up(ctlr);
2399 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2400 * @netdev: The net device used as a key
2402 * Locking: Must be called with the RNL mutex held.
2404 * Returns: NULL or the FCoE interface
2406 static struct fcoe_interface *
2407 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2409 struct fcoe_interface *fcoe;
2411 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2412 if (fcoe->netdev == netdev)
2419 * fcoe_hostlist_lookup() - Find the local port associated with a
2421 * @netdev: The netdevice used as a key
2423 * Locking: Must be called with the RTNL mutex held
2425 * Returns: NULL or the local port
2427 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2429 struct fcoe_ctlr *ctlr;
2430 struct fcoe_interface *fcoe;
2432 fcoe = fcoe_hostlist_lookup_port(netdev);
2433 ctlr = fcoe_to_ctlr(fcoe);
2434 return (fcoe) ? ctlr->lp : NULL;
2438 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2439 * port to the hostlist
2440 * @lport: The local port that identifies the FCoE interface to be added
2442 * Locking: must be called with the RTNL mutex held
2444 * Returns: 0 for success
2446 static int fcoe_hostlist_add(const struct fc_lport *lport)
2448 struct fcoe_interface *fcoe;
2449 struct fcoe_port *port;
2451 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2453 port = lport_priv(lport);
2455 list_add_tail(&fcoe->list, &fcoe_hostlist);
2461 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2462 * port to the hostlist
2463 * @lport: The local port that identifies the FCoE interface to be added
2465 * Locking: must be called with the RTNL mutex held
2468 static void fcoe_hostlist_del(const struct fc_lport *lport)
2470 struct fcoe_interface *fcoe;
2471 struct fcoe_port *port;
2473 port = lport_priv(lport);
2475 list_del(&fcoe->list);
2479 static struct fcoe_transport fcoe_sw_transport = {
2480 .name = {FCOE_TRANSPORT_DEFAULT},
2482 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2483 .match = fcoe_match,
2484 .alloc = fcoe_ctlr_alloc,
2485 .create = fcoe_create,
2486 .destroy = fcoe_destroy,
2487 .enable = fcoe_enable,
2488 .disable = fcoe_disable,
2492 * fcoe_init() - Initialize fcoe.ko
2494 * Returns: 0 on success, or a negative value on failure
2496 static int __init fcoe_init(void)
2498 struct fcoe_percpu_s *p;
2502 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2506 /* register as a fcoe transport */
2507 rc = fcoe_transport_attach(&fcoe_sw_transport);
2509 printk(KERN_ERR "failed to register an fcoe transport, check "
2510 "if libfcoe is loaded\n");
2514 mutex_lock(&fcoe_config_mutex);
2516 for_each_possible_cpu(cpu) {
2517 p = per_cpu_ptr(&fcoe_percpu, cpu);
2518 INIT_WORK(&p->work, fcoe_receive_work);
2519 skb_queue_head_init(&p->fcoe_rx_list);
2522 /* Setup link change notification */
2525 rc = fcoe_if_init();
2529 mutex_unlock(&fcoe_config_mutex);
2533 mutex_unlock(&fcoe_config_mutex);
2535 destroy_workqueue(fcoe_wq);
2538 module_init(fcoe_init);
2541 * fcoe_exit() - Clean up fcoe.ko
2543 * Returns: 0 on success or a negative value on failure
2545 static void __exit fcoe_exit(void)
2547 struct fcoe_interface *fcoe, *tmp;
2548 struct fcoe_ctlr *ctlr;
2549 struct fcoe_port *port;
2552 mutex_lock(&fcoe_config_mutex);
2556 /* releases the associated fcoe hosts */
2558 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2559 ctlr = fcoe_to_ctlr(fcoe);
2560 port = lport_priv(ctlr->lp);
2561 fcoe_hostlist_del(port->lport);
2562 queue_work(fcoe_wq, &port->destroy_work);
2566 for_each_possible_cpu(cpu)
2567 fcoe_thread_cleanup_local(cpu);
2569 mutex_unlock(&fcoe_config_mutex);
2572 * destroy_work's may be chained but destroy_workqueue()
2573 * can take care of them. Just kill the fcoe_wq.
2575 destroy_workqueue(fcoe_wq);
2578 * Detaching from the scsi transport must happen after all
2579 * destroys are done on the fcoe_wq. destroy_workqueue will
2580 * enusre the fcoe_wq is flushed.
2584 /* detach from fcoe transport */
2585 fcoe_transport_detach(&fcoe_sw_transport);
2587 module_exit(fcoe_exit);
2590 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2591 * @seq: active sequence in the FLOGI or FDISC exchange
2592 * @fp: response frame, or error encoded in a pointer (timeout)
2593 * @arg: pointer the the fcoe_ctlr structure
2595 * This handles MAC address management for FCoE, then passes control on to
2596 * the libfc FLOGI response handler.
2598 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2600 struct fcoe_ctlr *fip = arg;
2601 struct fc_exch *exch = fc_seq_exch(seq);
2602 struct fc_lport *lport = exch->lp;
2608 mac = fr_cb(fp)->granted_mac;
2610 if (is_zero_ether_addr(mac))
2611 fcoe_ctlr_recv_flogi(fip, lport, fp);
2612 if (!is_zero_ether_addr(mac))
2613 fcoe_update_src_mac(lport, mac);
2615 fc_lport_flogi_resp(seq, fp, lport);
2619 * fcoe_logo_resp() - FCoE specific LOGO response handler
2620 * @seq: active sequence in the LOGO exchange
2621 * @fp: response frame, or error encoded in a pointer (timeout)
2622 * @arg: pointer the the fcoe_ctlr structure
2624 * This handles MAC address management for FCoE, then passes control on to
2625 * the libfc LOGO response handler.
2627 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2629 struct fc_lport *lport = arg;
2630 static u8 zero_mac[ETH_ALEN] = { 0 };
2633 fcoe_update_src_mac(lport, zero_mac);
2634 fc_lport_logo_resp(seq, fp, lport);
2638 * fcoe_elsct_send - FCoE specific ELS handler
2640 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2641 * using FCoE specific response handlers and passing the FIP controller as
2642 * the argument (the lport is still available from the exchange).
2644 * Most of the work here is just handed off to the libfc routine.
2646 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2647 struct fc_frame *fp, unsigned int op,
2648 void (*resp)(struct fc_seq *,
2651 void *arg, u32 timeout)
2653 struct fcoe_port *port = lport_priv(lport);
2654 struct fcoe_interface *fcoe = port->priv;
2655 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
2656 struct fc_frame_header *fh = fc_frame_header_get(fp);
2661 if (lport->point_to_multipoint)
2663 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2666 /* only hook onto fabric logouts, not port logouts */
2667 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2669 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2672 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2676 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2677 * @vport: fc_vport object to create a new fc_host for
2678 * @disabled: start the new fc_host in a disabled state by default?
2680 * Returns: 0 for success
2682 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2684 struct Scsi_Host *shost = vport_to_shost(vport);
2685 struct fc_lport *n_port = shost_priv(shost);
2686 struct fcoe_port *port = lport_priv(n_port);
2687 struct fcoe_interface *fcoe = port->priv;
2688 struct net_device *netdev = fcoe->netdev;
2689 struct fc_lport *vn_port;
2693 rc = fcoe_validate_vport_create(vport);
2695 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2696 printk(KERN_ERR "fcoe: Failed to create vport, "
2697 "WWPN (0x%s) already exists\n",
2702 mutex_lock(&fcoe_config_mutex);
2704 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2706 mutex_unlock(&fcoe_config_mutex);
2708 if (IS_ERR(vn_port)) {
2709 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2715 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2717 vn_port->boot_time = jiffies;
2718 fc_fabric_login(vn_port);
2719 fc_vport_setlink(vn_port);
2725 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2726 * @vport: fc_vport object that is being destroyed
2728 * Returns: 0 for success
2730 static int fcoe_vport_destroy(struct fc_vport *vport)
2732 struct Scsi_Host *shost = vport_to_shost(vport);
2733 struct fc_lport *n_port = shost_priv(shost);
2734 struct fc_lport *vn_port = vport->dd_data;
2736 mutex_lock(&n_port->lp_mutex);
2737 list_del(&vn_port->list);
2738 mutex_unlock(&n_port->lp_mutex);
2740 mutex_lock(&fcoe_config_mutex);
2741 fcoe_if_destroy(vn_port);
2742 mutex_unlock(&fcoe_config_mutex);
2748 * fcoe_vport_disable() - change vport state
2749 * @vport: vport to bring online/offline
2750 * @disable: should the vport be disabled?
2752 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2754 struct fc_lport *lport = vport->dd_data;
2757 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2758 fc_fabric_logoff(lport);
2760 lport->boot_time = jiffies;
2761 fc_fabric_login(lport);
2762 fc_vport_setlink(lport);
2769 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2770 * @vport: fc_vport with a new symbolic name string
2772 * After generating a new symbolic name string, a new RSPN_ID request is
2773 * sent to the name server. There is no response handler, so if it fails
2774 * for some reason it will not be retried.
2776 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2778 struct fc_lport *lport = vport->dd_data;
2779 struct fc_frame *fp;
2782 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2783 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2784 fcoe_netdev(lport)->name, vport->symbolic_name);
2786 if (lport->state != LPORT_ST_READY)
2789 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2790 fp = fc_frame_alloc(lport,
2791 sizeof(struct fc_ct_hdr) +
2792 sizeof(struct fc_ns_rspn) + len);
2795 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2796 NULL, NULL, 3 * lport->r_a_tov);
2799 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2801 struct fcoe_ctlr_device *ctlr_dev =
2802 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2803 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2804 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2806 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2810 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2811 * @lport: the local port
2812 * @port_id: the port ID
2813 * @fp: the received frame, if any, that caused the port_id to be set.
2815 * This routine handles the case where we received a FLOGI and are
2816 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2817 * so it can set the non-mapped mode and gateway address.
2819 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2821 static void fcoe_set_port_id(struct fc_lport *lport,
2822 u32 port_id, struct fc_frame *fp)
2824 struct fcoe_port *port = lport_priv(lport);
2825 struct fcoe_interface *fcoe = port->priv;
2826 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2828 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2829 fcoe_ctlr_recv_flogi(ctlr, lport, fp);