1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
5 * Maintained at www.Open-FCoE.org
8 #include <linux/module.h>
9 #include <linux/spinlock.h>
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/ethtool.h>
13 #include <linux/if_ether.h>
14 #include <linux/if_vlan.h>
15 #include <linux/crc32.h>
16 #include <linux/slab.h>
17 #include <linux/cpu.h>
19 #include <linux/sysfs.h>
20 #include <linux/ctype.h>
21 #include <linux/workqueue.h>
22 #include <net/dcbnl.h>
23 #include <net/dcbevent.h>
24 #include <scsi/scsi_tcq.h>
25 #include <scsi/scsicam.h>
26 #include <scsi/scsi_transport.h>
27 #include <scsi/scsi_transport_fc.h>
28 #include <net/rtnetlink.h>
30 #include <scsi/fc/fc_encaps.h>
31 #include <scsi/fc/fc_fip.h>
32 #include <scsi/fc/fc_fcoe.h>
34 #include <scsi/libfc.h>
35 #include <scsi/fc_frame.h>
36 #include <scsi/libfcoe.h>
40 MODULE_AUTHOR("Open-FCoE.org");
41 MODULE_DESCRIPTION("FCoE");
42 MODULE_LICENSE("GPL v2");
44 /* Performance tuning parameters for fcoe */
45 static unsigned int fcoe_ddp_min = 4096;
46 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
47 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
48 "Direct Data Placement (DDP).");
50 unsigned int fcoe_debug_logging;
51 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
52 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
54 static unsigned int fcoe_e_d_tov = 2 * 1000;
55 module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR);
56 MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000");
58 static unsigned int fcoe_r_a_tov = 2 * 2 * 1000;
59 module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR);
60 MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000");
62 static DEFINE_MUTEX(fcoe_config_mutex);
64 static struct workqueue_struct *fcoe_wq;
67 /* must only by accessed under the RTNL mutex */
68 static LIST_HEAD(fcoe_hostlist);
69 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
71 /* Function Prototypes */
72 static int fcoe_reset(struct Scsi_Host *);
73 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
74 static int fcoe_rcv(struct sk_buff *, struct net_device *,
75 struct packet_type *, struct net_device *);
76 static void fcoe_percpu_clean(struct fc_lport *);
77 static int fcoe_link_ok(struct fc_lport *);
79 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
80 static int fcoe_hostlist_add(const struct fc_lport *);
81 static void fcoe_hostlist_del(const struct fc_lport *);
83 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
84 static void fcoe_dev_setup(void);
85 static void fcoe_dev_cleanup(void);
86 static struct fcoe_interface
87 *fcoe_hostlist_lookup_port(const struct net_device *);
89 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
90 struct packet_type *, struct net_device *);
91 static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *,
92 struct packet_type *, struct net_device *);
94 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
95 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
96 static u8 *fcoe_get_src_mac(struct fc_lport *);
97 static void fcoe_destroy_work(struct work_struct *);
99 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
101 static int fcoe_ddp_done(struct fc_lport *, u16);
102 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
104 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
105 ulong event, void *ptr);
107 static bool fcoe_match(struct net_device *netdev);
108 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode);
109 static int fcoe_destroy(struct net_device *netdev);
110 static int fcoe_enable(struct net_device *netdev);
111 static int fcoe_disable(struct net_device *netdev);
113 /* fcoe_syfs control interface handlers */
114 static int fcoe_ctlr_alloc(struct net_device *netdev);
115 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
116 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev);
118 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
119 u32 did, struct fc_frame *,
121 void (*resp)(struct fc_seq *,
124 void *, u32 timeout);
125 static void fcoe_recv_frame(struct sk_buff *skb);
127 /* notification function for packets from net device */
128 static struct notifier_block fcoe_notifier = {
129 .notifier_call = fcoe_device_notification,
132 /* notification function for DCB events */
133 static struct notifier_block dcb_notifier = {
134 .notifier_call = fcoe_dcb_app_notification,
137 static struct scsi_transport_template *fcoe_nport_scsi_transport;
138 static struct scsi_transport_template *fcoe_vport_scsi_transport;
140 static int fcoe_vport_destroy(struct fc_vport *);
141 static int fcoe_vport_create(struct fc_vport *, bool disabled);
142 static int fcoe_vport_disable(struct fc_vport *, bool disable);
143 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
144 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
145 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
146 static void fcoe_vport_remove(struct fc_lport *);
148 static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
149 .set_fcoe_ctlr_mode = fcoe_ctlr_mode,
150 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
151 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
152 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
153 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
154 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
155 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
156 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
158 .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
159 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
162 static struct libfc_function_template fcoe_libfc_fcn_templ = {
163 .frame_send = fcoe_xmit,
164 .ddp_setup = fcoe_ddp_setup,
165 .ddp_done = fcoe_ddp_done,
166 .ddp_target = fcoe_ddp_target,
167 .elsct_send = fcoe_elsct_send,
168 .get_lesb = fcoe_get_lesb,
169 .lport_set_port_id = fcoe_set_port_id,
172 static struct fc_function_template fcoe_nport_fc_functions = {
173 .show_host_node_name = 1,
174 .show_host_port_name = 1,
175 .show_host_supported_classes = 1,
176 .show_host_supported_fc4s = 1,
177 .show_host_active_fc4s = 1,
178 .show_host_maxframe_size = 1,
179 .show_host_serial_number = 1,
180 .show_host_manufacturer = 1,
181 .show_host_model = 1,
182 .show_host_model_description = 1,
183 .show_host_hardware_version = 1,
184 .show_host_driver_version = 1,
185 .show_host_firmware_version = 1,
186 .show_host_optionrom_version = 1,
188 .show_host_port_id = 1,
189 .show_host_supported_speeds = 1,
190 .get_host_speed = fc_get_host_speed,
191 .show_host_speed = 1,
192 .show_host_port_type = 1,
193 .get_host_port_state = fc_get_host_port_state,
194 .show_host_port_state = 1,
195 .show_host_symbolic_name = 1,
197 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
198 .show_rport_maxframe_size = 1,
199 .show_rport_supported_classes = 1,
201 .show_host_fabric_name = 1,
202 .show_starget_node_name = 1,
203 .show_starget_port_name = 1,
204 .show_starget_port_id = 1,
205 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
206 .show_rport_dev_loss_tmo = 1,
207 .get_fc_host_stats = fc_get_host_stats,
208 .issue_fc_host_lip = fcoe_reset,
210 .terminate_rport_io = fc_rport_terminate_io,
212 .vport_create = fcoe_vport_create,
213 .vport_delete = fcoe_vport_destroy,
214 .vport_disable = fcoe_vport_disable,
215 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
217 .bsg_request = fc_lport_bsg_request,
220 static struct fc_function_template fcoe_vport_fc_functions = {
221 .show_host_node_name = 1,
222 .show_host_port_name = 1,
223 .show_host_supported_classes = 1,
224 .show_host_supported_fc4s = 1,
225 .show_host_active_fc4s = 1,
226 .show_host_maxframe_size = 1,
227 .show_host_serial_number = 1,
228 .show_host_manufacturer = 1,
229 .show_host_model = 1,
230 .show_host_model_description = 1,
231 .show_host_hardware_version = 1,
232 .show_host_driver_version = 1,
233 .show_host_firmware_version = 1,
234 .show_host_optionrom_version = 1,
236 .show_host_port_id = 1,
237 .show_host_supported_speeds = 1,
238 .get_host_speed = fc_get_host_speed,
239 .show_host_speed = 1,
240 .show_host_port_type = 1,
241 .get_host_port_state = fc_get_host_port_state,
242 .show_host_port_state = 1,
243 .show_host_symbolic_name = 1,
245 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
246 .show_rport_maxframe_size = 1,
247 .show_rport_supported_classes = 1,
249 .show_host_fabric_name = 1,
250 .show_starget_node_name = 1,
251 .show_starget_port_name = 1,
252 .show_starget_port_id = 1,
253 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
254 .show_rport_dev_loss_tmo = 1,
255 .get_fc_host_stats = fc_get_host_stats,
256 .issue_fc_host_lip = fcoe_reset,
258 .terminate_rport_io = fc_rport_terminate_io,
260 .bsg_request = fc_lport_bsg_request,
263 static struct scsi_host_template fcoe_shost_template = {
264 .module = THIS_MODULE,
265 .name = "FCoE Driver",
266 .proc_name = FCOE_NAME,
267 .queuecommand = fc_queuecommand,
268 .eh_timed_out = fc_eh_timed_out,
269 .eh_abort_handler = fc_eh_abort,
270 .eh_device_reset_handler = fc_eh_device_reset,
271 .eh_host_reset_handler = fc_eh_host_reset,
272 .slave_alloc = fc_slave_alloc,
273 .change_queue_depth = scsi_change_queue_depth,
276 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
277 .sg_tablesize = SG_ALL,
278 .max_sectors = 0xffff,
279 .track_queue_depth = 1,
283 * fcoe_interface_setup() - Setup a FCoE interface
284 * @fcoe: The new FCoE interface
285 * @netdev: The net device that the fcoe interface is on
287 * Returns : 0 for success
288 * Locking: must be called with the RTNL mutex held
290 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
291 struct net_device *netdev)
293 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
294 struct netdev_hw_addr *ha;
295 struct net_device *real_dev;
296 u8 flogi_maddr[ETH_ALEN];
297 const struct net_device_ops *ops;
299 fcoe->netdev = netdev;
301 /* Let LLD initialize for FCoE */
302 ops = netdev->netdev_ops;
303 if (ops->ndo_fcoe_enable) {
304 if (ops->ndo_fcoe_enable(netdev))
305 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
306 " specific feature for LLD.\n");
309 /* Do not support for bonding device */
310 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
311 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
315 /* look for SAN MAC address, if multiple SAN MACs exist, only
316 * use the first one for SPMA */
317 real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev;
318 fcoe->realdev = real_dev;
320 for_each_dev_addr(real_dev, ha) {
321 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
322 (is_valid_ether_addr(ha->addr))) {
323 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
330 /* setup Source Mac Address */
332 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
335 * Add FCoE MAC address as second unicast MAC address
336 * or enter promiscuous mode if not capable of listening
337 * for multiple unicast MACs.
339 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
340 dev_uc_add(netdev, flogi_maddr);
342 dev_uc_add(netdev, fip->ctl_src_addr);
343 if (fip->mode == FIP_MODE_VN2VN) {
344 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
345 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
347 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
350 * setup the receive function from ethernet driver
351 * on the ethertype for the given device
353 fcoe->fcoe_packet_type.func = fcoe_rcv;
354 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);
355 fcoe->fcoe_packet_type.dev = netdev;
356 dev_add_pack(&fcoe->fcoe_packet_type);
358 fcoe->fip_packet_type.func = fcoe_fip_recv;
359 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
360 fcoe->fip_packet_type.dev = netdev;
361 dev_add_pack(&fcoe->fip_packet_type);
363 if (netdev != real_dev) {
364 fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv;
365 fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP);
366 fcoe->fip_vlan_packet_type.dev = real_dev;
367 dev_add_pack(&fcoe->fip_vlan_packet_type);
373 * fcoe_interface_create() - Create a FCoE interface on a net device
374 * @netdev: The net device to create the FCoE interface on
375 * @fip_mode: The mode to use for FIP
377 * Returns: pointer to a struct fcoe_interface or NULL on error
379 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
380 enum fip_mode fip_mode)
382 struct fcoe_ctlr_device *ctlr_dev;
383 struct fcoe_ctlr *ctlr;
384 struct fcoe_interface *fcoe;
388 if (!try_module_get(THIS_MODULE)) {
389 FCOE_NETDEV_DBG(netdev,
390 "Could not get a reference to the module\n");
391 fcoe = ERR_PTR(-EBUSY);
395 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
396 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
399 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
400 fcoe = ERR_PTR(-ENOMEM);
404 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
405 ctlr->cdev = ctlr_dev;
406 fcoe = fcoe_ctlr_priv(ctlr);
413 fcoe_ctlr_init(ctlr, fip_mode);
414 ctlr->send = fcoe_fip_send;
415 ctlr->update_mac = fcoe_update_src_mac;
416 ctlr->get_src_addr = fcoe_get_src_mac;
418 err = fcoe_interface_setup(fcoe, netdev);
420 fcoe_ctlr_destroy(ctlr);
421 fcoe_ctlr_device_delete(ctlr_dev);
430 module_put(THIS_MODULE);
436 * fcoe_interface_remove() - remove FCoE interface from netdev
437 * @fcoe: The FCoE interface to be cleaned up
439 * Caller must be holding the RTNL mutex
441 static void fcoe_interface_remove(struct fcoe_interface *fcoe)
443 struct net_device *netdev = fcoe->netdev;
444 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
445 u8 flogi_maddr[ETH_ALEN];
446 const struct net_device_ops *ops;
449 * Don't listen for Ethernet packets anymore.
450 * synchronize_net() ensures that the packet handlers are not running
451 * on another CPU. dev_remove_pack() would do that, this calls the
452 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
454 __dev_remove_pack(&fcoe->fcoe_packet_type);
455 __dev_remove_pack(&fcoe->fip_packet_type);
456 if (netdev != fcoe->realdev)
457 __dev_remove_pack(&fcoe->fip_vlan_packet_type);
460 /* Delete secondary MAC addresses */
461 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
462 dev_uc_del(netdev, flogi_maddr);
464 dev_uc_del(netdev, fip->ctl_src_addr);
465 if (fip->mode == FIP_MODE_VN2VN) {
466 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
467 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
469 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
471 /* Tell the LLD we are done w/ FCoE */
472 ops = netdev->netdev_ops;
473 if (ops->ndo_fcoe_disable) {
474 if (ops->ndo_fcoe_disable(netdev))
475 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
476 " specific feature for LLD.\n");
483 * fcoe_interface_cleanup() - Clean up a FCoE interface
484 * @fcoe: The FCoE interface to be cleaned up
486 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
488 struct net_device *netdev = fcoe->netdev;
489 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
491 /* Release the self-reference taken during fcoe_interface_create() */
492 /* tear-down the FCoE controller */
493 fcoe_ctlr_destroy(fip);
494 scsi_host_put(fip->lp->host);
496 module_put(THIS_MODULE);
500 * fcoe_fip_recv() - Handler for received FIP frames
501 * @skb: The receive skb
502 * @netdev: The associated net device
503 * @ptype: The packet_type structure which was used to register this handler
504 * @orig_dev: The original net_device the skb was received on.
505 * (in case dev is a bond)
507 * Returns: 0 for success
509 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
510 struct packet_type *ptype,
511 struct net_device *orig_dev)
513 struct fcoe_interface *fcoe;
514 struct fcoe_ctlr *ctlr;
516 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
517 ctlr = fcoe_to_ctlr(fcoe);
518 fcoe_ctlr_recv(ctlr, skb);
523 * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames
524 * @skb: The receive skb
525 * @netdev: The associated net device
526 * @ptype: The packet_type structure which was used to register this handler
527 * @orig_dev: The original net_device the skb was received on.
528 * (in case dev is a bond)
530 * Returns: 0 for success
532 static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev,
533 struct packet_type *ptype,
534 struct net_device *orig_dev)
536 struct fcoe_interface *fcoe;
537 struct fcoe_ctlr *ctlr;
539 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type);
540 ctlr = fcoe_to_ctlr(fcoe);
541 fcoe_ctlr_recv(ctlr, skb);
546 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
547 * @port: The FCoE port
548 * @skb: The FIP/FCoE packet to be sent
550 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
552 if (port->fcoe_pending_queue.qlen)
553 fcoe_check_wait_queue(port->lport, skb);
554 else if (fcoe_start_io(skb))
555 fcoe_check_wait_queue(port->lport, skb);
559 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
560 * @fip: The FCoE controller
561 * @skb: The FIP packet to be sent
563 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
565 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip);
568 struct fip_header fip;
572 * Use default VLAN for FIP VLAN discovery protocol
574 frame = (struct fip_frame *)skb->data;
575 if (ntohs(frame->eth.h_proto) == ETH_P_FIP &&
576 ntohs(frame->fip.fip_op) == FIP_OP_VLAN &&
577 fcoe->realdev != fcoe->netdev)
578 skb->dev = fcoe->realdev;
580 skb->dev = fcoe->netdev;
581 fcoe_port_send(lport_priv(fip->lp), skb);
585 * fcoe_update_src_mac() - Update the Ethernet MAC filters
586 * @lport: The local port to update the source MAC on
587 * @addr: Unicast MAC address to add
589 * Remove any previously-set unicast MAC filter.
590 * Add secondary FCoE MAC address filter for our OUI.
592 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
594 struct fcoe_port *port = lport_priv(lport);
595 struct fcoe_interface *fcoe = port->priv;
597 if (!is_zero_ether_addr(port->data_src_addr))
598 dev_uc_del(fcoe->netdev, port->data_src_addr);
599 if (!is_zero_ether_addr(addr))
600 dev_uc_add(fcoe->netdev, addr);
601 memcpy(port->data_src_addr, addr, ETH_ALEN);
605 * fcoe_get_src_mac() - return the Ethernet source address for an lport
606 * @lport: libfc lport
608 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
610 struct fcoe_port *port = lport_priv(lport);
612 return port->data_src_addr;
616 * fcoe_lport_config() - Set up a local port
617 * @lport: The local port to be setup
619 * Returns: 0 for success
621 static int fcoe_lport_config(struct fc_lport *lport)
625 lport->max_retry_count = 3;
626 lport->max_rport_retry_count = 3;
627 lport->e_d_tov = fcoe_e_d_tov;
628 lport->r_a_tov = fcoe_r_a_tov;
629 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
630 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
631 lport->does_npiv = 1;
633 fc_lport_init_stats(lport);
635 /* lport fc_lport related configuration */
636 fc_lport_config(lport);
638 /* offload related configuration */
639 lport->crc_offload = 0;
640 lport->seq_offload = 0;
641 lport->lro_enabled = 0;
649 * fcoe_netdev_features_change - Updates the lport's offload flags based
650 * on the LLD netdev's FCoE feature flags
652 static void fcoe_netdev_features_change(struct fc_lport *lport,
653 struct net_device *netdev)
655 mutex_lock(&lport->lp_mutex);
657 if (netdev->features & NETIF_F_SG)
662 if (netdev->features & NETIF_F_FCOE_CRC) {
663 lport->crc_offload = 1;
664 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
666 lport->crc_offload = 0;
669 if (netdev->features & NETIF_F_FSO) {
670 lport->seq_offload = 1;
671 lport->lso_max = netdev->gso_max_size;
672 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
675 lport->seq_offload = 0;
679 if (netdev->fcoe_ddp_xid) {
680 lport->lro_enabled = 1;
681 lport->lro_xid = netdev->fcoe_ddp_xid;
682 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
685 lport->lro_enabled = 0;
689 mutex_unlock(&lport->lp_mutex);
693 * fcoe_netdev_config() - Set up net devive for SW FCoE
694 * @lport: The local port that is associated with the net device
695 * @netdev: The associated net device
697 * Must be called after fcoe_lport_config() as it will use local port mutex
699 * Returns: 0 for success
701 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
705 struct fcoe_interface *fcoe;
706 struct fcoe_ctlr *ctlr;
707 struct fcoe_port *port;
709 /* Setup lport private data to point to fcoe softc */
710 port = lport_priv(lport);
712 ctlr = fcoe_to_ctlr(fcoe);
714 /* Figure out the VLAN ID, if any */
715 if (is_vlan_dev(netdev))
716 lport->vlan = vlan_dev_vlan_id(netdev);
721 * Determine max frame size based on underlying device and optional
722 * user-configured limit. If the MFS is too low, fcoe_link_ok()
723 * will return 0, so do this first.
726 if (netdev->features & NETIF_F_FCOE_MTU) {
728 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
730 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
731 if (fc_set_mfs(lport, mfs))
734 /* offload features support */
735 fcoe_netdev_features_change(lport, netdev);
737 skb_queue_head_init(&port->fcoe_pending_queue);
738 port->fcoe_pending_queue_active = 0;
739 timer_setup(&port->timer, fcoe_queue_timer, 0);
741 fcoe_link_speed_update(lport);
744 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
745 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
746 fc_set_wwnn(lport, wwnn);
747 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
748 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
750 fc_set_wwpn(lport, wwpn);
757 * fcoe_shost_config() - Set up the SCSI host associated with a local port
758 * @lport: The local port
759 * @dev: The device associated with the SCSI host
761 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
763 * Returns: 0 for success
765 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
769 /* lport scsi host config */
770 lport->host->max_lun = FCOE_MAX_LUN;
771 lport->host->max_id = FCOE_MAX_FCP_TARGET;
772 lport->host->max_channel = 0;
773 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
776 lport->host->transportt = fcoe_vport_scsi_transport;
778 lport->host->transportt = fcoe_nport_scsi_transport;
780 /* add the new host to the SCSI-ml */
781 rc = scsi_add_host(lport->host, dev);
783 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
784 "error on scsi_add_host\n");
789 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
791 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
792 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
793 fcoe_netdev(lport)->name);
800 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
801 * @lport: The local port that is associated with the net device
802 * @netdev: The associated net device
804 * Must be called after fcoe_shost_config() as it will use local port mutex
807 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
809 struct fcoe_interface *fcoe;
810 struct fcoe_port *port;
811 struct net_device *realdev;
814 port = lport_priv(lport);
816 realdev = fcoe->realdev;
818 /* No FDMI state m/c for NPIV ports */
822 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
823 struct netdev_fcoe_hbainfo *fdmi;
824 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
828 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
831 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
832 "information from netdev.\n");
836 snprintf(fc_host_serial_number(lport->host),
837 FC_SERIAL_NUMBER_SIZE,
839 fdmi->serial_number);
840 snprintf(fc_host_manufacturer(lport->host),
841 FC_SERIAL_NUMBER_SIZE,
844 snprintf(fc_host_model(lport->host),
845 FC_SYMBOLIC_NAME_SIZE,
848 snprintf(fc_host_model_description(lport->host),
849 FC_SYMBOLIC_NAME_SIZE,
851 fdmi->model_description);
852 snprintf(fc_host_hardware_version(lport->host),
853 FC_VERSION_STRING_SIZE,
855 fdmi->hardware_version);
856 snprintf(fc_host_driver_version(lport->host),
857 FC_VERSION_STRING_SIZE,
859 fdmi->driver_version);
860 snprintf(fc_host_optionrom_version(lport->host),
861 FC_VERSION_STRING_SIZE,
863 fdmi->optionrom_version);
864 snprintf(fc_host_firmware_version(lport->host),
865 FC_VERSION_STRING_SIZE,
867 fdmi->firmware_version);
869 /* Enable FDMI lport states */
870 lport->fdmi_enabled = 1;
873 lport->fdmi_enabled = 0;
874 printk(KERN_INFO "fcoe: No FDMI support.\n");
879 * fcoe_oem_match() - The match routine for the offloaded exchange manager
882 * This routine will be associated with an exchange manager (EM). When
883 * the libfc exchange handling code is looking for an EM to use it will
884 * call this routine and pass it the frame that it wishes to send. This
885 * routine will return True if the associated EM is to be used and False
886 * if the echange code should continue looking for an EM.
888 * The offload EM that this routine is associated with will handle any
889 * packets that are for SCSI read requests.
891 * This has been enhanced to work when FCoE stack is operating in target
894 * Returns: True for read types I/O, otherwise returns false.
896 static bool fcoe_oem_match(struct fc_frame *fp)
898 struct fc_frame_header *fh = fc_frame_header_get(fp);
899 struct fcp_cmnd *fcp;
901 if (fc_fcp_is_read(fr_fsp(fp)) &&
902 (fr_fsp(fp)->data_len > fcoe_ddp_min))
904 else if ((fr_fsp(fp) == NULL) &&
905 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
906 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
907 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
908 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
909 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
916 * fcoe_em_config() - Allocate and configure an exchange manager
917 * @lport: The local port that the new EM will be associated with
919 * Returns: 0 on success
921 static inline int fcoe_em_config(struct fc_lport *lport)
923 struct fcoe_port *port = lport_priv(lport);
924 struct fcoe_interface *fcoe = port->priv;
925 struct fcoe_interface *oldfcoe = NULL;
926 struct net_device *old_real_dev, *cur_real_dev;
927 u16 min_xid = FCOE_MIN_XID;
928 u16 max_xid = FCOE_MAX_XID;
931 * Check if need to allocate an em instance for
932 * offload exchange ids to be shared across all VN_PORTs/lport.
934 if (!lport->lro_enabled || !lport->lro_xid ||
935 (lport->lro_xid >= max_xid)) {
941 * Reuse existing offload em instance in case
942 * it is already allocated on real eth device
944 if (is_vlan_dev(fcoe->netdev))
945 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
947 cur_real_dev = fcoe->netdev;
949 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
950 if (is_vlan_dev(oldfcoe->netdev))
951 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
953 old_real_dev = oldfcoe->netdev;
955 if (cur_real_dev == old_real_dev) {
956 fcoe->oem = oldfcoe->oem;
962 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
963 printk(KERN_ERR "fcoe_em_config: failed to add "
964 "offload em:%p on interface:%s\n",
965 fcoe->oem, fcoe->netdev->name);
969 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
970 FCOE_MIN_XID, lport->lro_xid,
973 printk(KERN_ERR "fcoe_em_config: failed to allocate "
974 "em for offload exches on interface:%s\n",
981 * Exclude offload EM xid range from next EM xid range.
983 min_xid += lport->lro_xid + 1;
986 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
987 printk(KERN_ERR "fcoe_em_config: failed to "
988 "allocate em on interface %s\n", fcoe->netdev->name);
996 * fcoe_if_destroy() - Tear down a SW FCoE instance
997 * @lport: The local port to be destroyed
999 * Locking: Must be called with the RTNL mutex held.
1002 static void fcoe_if_destroy(struct fc_lport *lport)
1004 struct fcoe_port *port = lport_priv(lport);
1005 struct fcoe_interface *fcoe = port->priv;
1006 struct net_device *netdev = fcoe->netdev;
1008 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
1010 /* Logout of the fabric */
1011 fc_fabric_logoff(lport);
1013 /* Cleanup the fc_lport */
1014 fc_lport_destroy(lport);
1016 /* Stop the transmit retry timer */
1017 del_timer_sync(&port->timer);
1019 /* Free existing transmit skbs */
1020 fcoe_clean_pending_queue(lport);
1022 if (!is_zero_ether_addr(port->data_src_addr))
1023 dev_uc_del(netdev, port->data_src_addr);
1027 fcoe_interface_remove(fcoe);
1029 /* Free queued packets for the per-CPU receive threads */
1030 fcoe_percpu_clean(lport);
1032 /* Detach from the scsi-ml */
1033 fc_remove_host(lport->host);
1034 scsi_remove_host(lport->host);
1036 /* Destroy lport scsi_priv */
1037 fc_fcp_destroy(lport);
1039 /* There are no more rports or I/O, free the EM */
1040 fc_exch_mgr_free(lport);
1042 /* Free memory used by statistical counters */
1043 fc_lport_free_stats(lport);
1046 * Release the Scsi_Host for vport but hold on to
1047 * master lport until it fcoe interface fully cleaned-up.
1050 scsi_host_put(lport->host);
1054 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1055 * @lport: The local port to setup DDP for
1056 * @xid: The exchange ID for this DDP transfer
1057 * @sgl: The scatterlist describing this transfer
1058 * @sgc: The number of sg items
1060 * Returns: 0 if the DDP context was not configured
1062 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1063 struct scatterlist *sgl, unsigned int sgc)
1065 struct net_device *netdev = fcoe_netdev(lport);
1067 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1068 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1076 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1077 * @lport: The local port to setup DDP for
1078 * @xid: The exchange ID for this DDP transfer
1079 * @sgl: The scatterlist describing this transfer
1080 * @sgc: The number of sg items
1082 * Returns: 0 if the DDP context was not configured
1084 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1085 struct scatterlist *sgl, unsigned int sgc)
1087 struct net_device *netdev = fcoe_netdev(lport);
1089 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1090 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1098 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1099 * @lport: The local port to complete DDP on
1100 * @xid: The exchange ID for this DDP transfer
1102 * Returns: the length of data that have been completed by DDP
1104 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1106 struct net_device *netdev = fcoe_netdev(lport);
1108 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1109 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1114 * fcoe_if_create() - Create a FCoE instance on an interface
1115 * @fcoe: The FCoE interface to create a local port on
1116 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1117 * @npiv: Indicates if the port is a vport or not
1119 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1121 * Returns: The allocated fc_lport or an error pointer
1123 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1124 struct device *parent, int npiv)
1126 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1127 struct net_device *netdev = fcoe->netdev;
1128 struct fc_lport *lport, *n_port;
1129 struct fcoe_port *port;
1130 struct Scsi_Host *shost;
1133 * parent is only a vport if npiv is 1,
1134 * but we'll only use vport in that case so go ahead and set it
1136 struct fc_vport *vport = dev_to_vport(parent);
1138 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1141 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1143 lport = libfc_vport_create(vport, sizeof(*port));
1146 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1150 port = lport_priv(lport);
1151 port->lport = lport;
1153 port->get_netdev = fcoe_netdev;
1154 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1155 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1156 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1159 * Need to add the lport to the hostlist
1160 * so we catch NETDEV_CHANGE events.
1162 fcoe_hostlist_add(lport);
1164 /* configure a fc_lport including the exchange manager */
1165 rc = fcoe_lport_config(lport);
1167 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1173 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1174 "%16.16llx %16.16llx\n",
1175 vport->node_name, vport->port_name);
1176 fc_set_wwnn(lport, vport->node_name);
1177 fc_set_wwpn(lport, vport->port_name);
1180 /* configure lport network properties */
1181 rc = fcoe_netdev_config(lport, netdev);
1183 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1185 goto out_lp_destroy;
1188 /* configure lport scsi host properties */
1189 rc = fcoe_shost_config(lport, parent);
1191 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1193 goto out_lp_destroy;
1196 /* Initialize the library */
1197 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
1199 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1201 goto out_lp_destroy;
1204 /* Initialized FDMI information */
1205 fcoe_fdmi_info(lport, netdev);
1208 * fcoe_em_alloc() and fcoe_hostlist_add() both
1209 * need to be atomic with respect to other changes to the
1210 * hostlist since fcoe_em_alloc() looks for an existing EM
1211 * instance on host list updated by fcoe_hostlist_add().
1213 * This is currently handled through the fcoe_config_mutex
1217 /* lport exch manager allocation */
1218 rc = fcoe_em_config(lport);
1220 shost = vport_to_shost(vport);
1221 n_port = shost_priv(shost);
1222 rc = fc_exch_mgr_list_clone(n_port, lport);
1226 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1227 goto out_lp_destroy;
1233 fc_exch_mgr_free(lport);
1235 fcoe_hostlist_del(lport);
1236 scsi_host_put(lport->host);
1242 * fcoe_if_init() - Initialization routine for fcoe.ko
1244 * Attaches the SW FCoE transport to the FC transport
1246 * Returns: 0 on success
1248 static int __init fcoe_if_init(void)
1250 /* attach to scsi transport */
1251 fcoe_nport_scsi_transport =
1252 fc_attach_transport(&fcoe_nport_fc_functions);
1253 fcoe_vport_scsi_transport =
1254 fc_attach_transport(&fcoe_vport_fc_functions);
1256 if (!fcoe_nport_scsi_transport) {
1257 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1265 * fcoe_if_exit() - Tear down fcoe.ko
1267 * Detaches the SW FCoE transport from the FC transport
1269 * Returns: 0 on success
1271 static int __exit fcoe_if_exit(void)
1273 fc_release_transport(fcoe_nport_scsi_transport);
1274 fc_release_transport(fcoe_vport_scsi_transport);
1275 fcoe_nport_scsi_transport = NULL;
1276 fcoe_vport_scsi_transport = NULL;
1280 static void fcoe_thread_cleanup_local(unsigned int cpu)
1282 struct page *crc_eof;
1283 struct fcoe_percpu_s *p;
1285 p = per_cpu_ptr(&fcoe_percpu, cpu);
1286 spin_lock_bh(&p->fcoe_rx_list.lock);
1287 crc_eof = p->crc_eof_page;
1288 p->crc_eof_page = NULL;
1289 p->crc_eof_offset = 0;
1290 spin_unlock_bh(&p->fcoe_rx_list.lock);
1294 flush_work(&p->work);
1298 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1301 * This routine selects next CPU based on cpumask to distribute
1302 * incoming requests in round robin.
1304 * Returns: int CPU number
1306 static inline unsigned int fcoe_select_cpu(void)
1308 static unsigned int selected_cpu;
1310 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1311 if (selected_cpu >= nr_cpu_ids)
1312 selected_cpu = cpumask_first(cpu_online_mask);
1314 return selected_cpu;
1318 * fcoe_rcv() - Receive packets from a net device
1319 * @skb: The received packet
1320 * @netdev: The net device that the packet was received on
1321 * @ptype: The packet type context
1322 * @olddev: The last device net device
1324 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1325 * FC frame and passes the frame to libfc.
1327 * Returns: 0 for success
1329 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1330 struct packet_type *ptype, struct net_device *olddev)
1332 struct fc_lport *lport;
1333 struct fcoe_rcv_info *fr;
1334 struct fcoe_ctlr *ctlr;
1335 struct fcoe_interface *fcoe;
1336 struct fc_frame_header *fh;
1337 struct fcoe_percpu_s *fps;
1341 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1342 ctlr = fcoe_to_ctlr(fcoe);
1344 if (unlikely(!lport)) {
1345 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
1348 if (!lport->link_up)
1351 FCOE_NETDEV_DBG(netdev,
1352 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1353 skb->len, skb->data_len, skb->head, skb->data,
1354 skb_tail_pointer(skb), skb_end_pointer(skb),
1355 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1358 skb = skb_share_check(skb, GFP_ATOMIC);
1365 if (is_fip_mode(ctlr) &&
1366 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
1367 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1373 * Check for minimum frame length, and make sure required FCoE
1374 * and FC headers are pulled into the linear data area.
1376 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1377 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1380 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1381 fh = (struct fc_frame_header *) skb_transport_header(skb);
1383 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1384 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1389 fr = fcoe_dev_from_skb(skb);
1393 * In case the incoming frame's exchange is originated from
1394 * the initiator, then received frame's exchange id is ANDed
1395 * with fc_cpu_mask bits to get the same cpu on which exchange
1396 * was originated, otherwise select cpu using rx exchange id
1397 * or fcoe_select_cpu().
1399 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1400 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1402 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1403 cpu = fcoe_select_cpu();
1405 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1408 if (cpu >= nr_cpu_ids)
1411 fps = &per_cpu(fcoe_percpu, cpu);
1412 spin_lock(&fps->fcoe_rx_list.lock);
1414 * We now have a valid CPU that we're targeting for
1415 * this skb. We also have this receive thread locked,
1416 * so we're free to queue skbs into it's queue.
1420 * Note: We used to have a set of conditions under which we would
1421 * call fcoe_recv_frame directly, rather than queuing to the rx list
1422 * as it could save a few cycles, but doing so is prohibited, as
1423 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1424 * in softirq context.
1426 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1427 schedule_work_on(cpu, &fps->work);
1428 spin_unlock(&fps->fcoe_rx_list.lock);
1430 return NET_RX_SUCCESS;
1432 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
1440 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1441 * @skb: The packet to be transmitted
1442 * @tlen: The total length of the trailer
1444 * Returns: 0 for success
1446 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1448 struct fcoe_percpu_s *fps;
1451 fps = &get_cpu_var(fcoe_percpu);
1452 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1453 put_cpu_var(fcoe_percpu);
1459 * fcoe_xmit() - Transmit a FCoE frame
1460 * @lport: The local port that the frame is to be transmitted for
1461 * @fp: The frame to be transmitted
1463 * Return: 0 for success
1465 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1470 struct fcoe_crc_eof *cp;
1471 struct sk_buff *skb;
1472 struct fc_stats *stats;
1473 struct fc_frame_header *fh;
1474 unsigned int hlen; /* header length implies the version */
1475 unsigned int tlen; /* trailer length */
1476 unsigned int elen; /* eth header, may include vlan */
1477 struct fcoe_port *port = lport_priv(lport);
1478 struct fcoe_interface *fcoe = port->priv;
1479 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1481 struct fcoe_hdr *hp;
1483 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1485 fh = fc_frame_header_get(fp);
1487 wlen = skb->len / FCOE_WORD_TO_BYTE;
1489 if (!lport->link_up) {
1494 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1495 fcoe_ctlr_els_send(ctlr, lport, skb))
1501 elen = sizeof(struct ethhdr);
1502 hlen = sizeof(struct fcoe_hdr);
1503 tlen = sizeof(struct fcoe_crc_eof);
1504 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1507 if (likely(lport->crc_offload)) {
1508 skb->ip_summed = CHECKSUM_PARTIAL;
1509 skb->csum_start = skb_headroom(skb);
1510 skb->csum_offset = skb->len;
1513 skb->ip_summed = CHECKSUM_NONE;
1514 crc = fcoe_fc_crc(fp);
1517 /* copy port crc and eof to the skb buff */
1518 if (skb_is_nonlinear(skb)) {
1520 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1524 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1525 cp = kmap_atomic(skb_frag_page(frag))
1526 + frag->page_offset;
1528 cp = skb_put(skb, tlen);
1531 memset(cp, 0, sizeof(*cp));
1533 cp->fcoe_crc32 = cpu_to_le32(~crc);
1535 if (skb_is_nonlinear(skb)) {
1540 /* adjust skb network/transport offsets to match mac/fcoe/port */
1541 skb_push(skb, elen + hlen);
1542 skb_reset_mac_header(skb);
1543 skb_reset_network_header(skb);
1544 skb->mac_len = elen;
1545 skb->protocol = htons(ETH_P_FCOE);
1546 skb->priority = fcoe->priority;
1548 if (is_vlan_dev(fcoe->netdev) &&
1549 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
1550 /* must set skb->dev before calling vlan_put_tag */
1551 skb->dev = fcoe->realdev;
1552 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1553 vlan_dev_vlan_id(fcoe->netdev));
1555 skb->dev = fcoe->netdev;
1557 /* fill up mac and fcoe headers */
1559 eh->h_proto = htons(ETH_P_FCOE);
1560 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1562 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1564 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1565 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
1567 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1569 hp = (struct fcoe_hdr *)(eh + 1);
1570 memset(hp, 0, sizeof(*hp));
1572 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1575 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1576 if (lport->seq_offload && fr_max_payload(fp)) {
1577 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1578 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1580 skb_shinfo(skb)->gso_type = 0;
1581 skb_shinfo(skb)->gso_size = 0;
1583 /* update tx stats: regardless if LLD fails */
1584 stats = per_cpu_ptr(lport->stats, get_cpu());
1586 stats->TxWords += wlen;
1589 /* send down to lld */
1591 fcoe_port_send(port, skb);
1596 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1597 * @lport: The local port the frame was received on
1598 * @fp: The received frame
1600 * Return: 0 on passing filtering checks
1602 static inline int fcoe_filter_frames(struct fc_lport *lport,
1603 struct fc_frame *fp)
1605 struct fcoe_ctlr *ctlr;
1606 struct fcoe_interface *fcoe;
1607 struct fc_frame_header *fh;
1608 struct sk_buff *skb = (struct sk_buff *)fp;
1609 struct fc_stats *stats;
1612 * We only check CRC if no offload is available and if it is
1613 * it's solicited data, in which case, the FCP layer would
1614 * check it during the copy.
1616 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1617 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1619 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1621 fh = (struct fc_frame_header *) skb_transport_header(skb);
1622 fh = fc_frame_header_get(fp);
1623 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1626 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1627 ctlr = fcoe_to_ctlr(fcoe);
1628 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1629 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1630 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1634 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1635 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1636 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1640 stats = per_cpu_ptr(lport->stats, get_cpu());
1641 stats->InvalidCRCCount++;
1642 if (stats->InvalidCRCCount < 5)
1643 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1649 * fcoe_recv_frame() - process a single received frame
1650 * @skb: frame to process
1652 static void fcoe_recv_frame(struct sk_buff *skb)
1655 struct fc_lport *lport;
1656 struct fcoe_rcv_info *fr;
1657 struct fc_stats *stats;
1658 struct fcoe_crc_eof crc_eof;
1659 struct fc_frame *fp;
1660 struct fcoe_hdr *hp;
1662 fr = fcoe_dev_from_skb(skb);
1664 if (unlikely(!lport)) {
1665 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
1670 FCOE_NETDEV_DBG(skb->dev,
1671 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1672 skb->len, skb->data_len,
1673 skb->head, skb->data, skb_tail_pointer(skb),
1674 skb_end_pointer(skb), skb->csum,
1675 skb->dev ? skb->dev->name : "<NULL>");
1677 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
1680 * Frame length checks and setting up the header pointers
1681 * was done in fcoe_rcv already.
1683 hp = (struct fcoe_hdr *) skb_network_header(skb);
1685 stats = per_cpu_ptr(lport->stats, get_cpu());
1686 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1687 if (stats->ErrorFrames < 5)
1688 printk(KERN_WARNING "fcoe: FCoE version "
1689 "mismatch: The frame has "
1690 "version %x, but the "
1691 "initiator supports version "
1692 "%x\n", FC_FCOE_DECAPS_VER(hp),
1697 skb_pull(skb, sizeof(struct fcoe_hdr));
1698 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1701 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1703 fp = (struct fc_frame *)skb;
1706 fr_sof(fp) = hp->fcoe_sof;
1708 /* Copy out the CRC and EOF trailer for access */
1709 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1711 fr_eof(fp) = crc_eof.fcoe_eof;
1712 fr_crc(fp) = crc_eof.fcoe_crc32;
1713 if (pskb_trim(skb, fr_len))
1716 if (!fcoe_filter_frames(lport, fp)) {
1718 fc_exch_recv(lport, fp);
1722 stats->ErrorFrames++;
1728 * fcoe_receive_work() - The per-CPU worker
1729 * @work: The work struct
1732 static void fcoe_receive_work(struct work_struct *work)
1734 struct fcoe_percpu_s *p;
1735 struct sk_buff *skb;
1736 struct sk_buff_head tmp;
1738 p = container_of(work, struct fcoe_percpu_s, work);
1739 skb_queue_head_init(&tmp);
1741 spin_lock_bh(&p->fcoe_rx_list.lock);
1742 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1743 spin_unlock_bh(&p->fcoe_rx_list.lock);
1745 if (!skb_queue_len(&tmp))
1748 while ((skb = __skb_dequeue(&tmp)))
1749 fcoe_recv_frame(skb);
1753 * fcoe_dev_setup() - Setup the link change notification interface
1755 static void fcoe_dev_setup(void)
1757 register_dcbevent_notifier(&dcb_notifier);
1758 register_netdevice_notifier(&fcoe_notifier);
1762 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1764 static void fcoe_dev_cleanup(void)
1766 unregister_dcbevent_notifier(&dcb_notifier);
1767 unregister_netdevice_notifier(&fcoe_notifier);
1770 static struct fcoe_interface *
1771 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1773 struct fcoe_interface *fcoe;
1774 struct net_device *real_dev;
1776 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1777 if (is_vlan_dev(fcoe->netdev))
1778 real_dev = vlan_dev_real_dev(fcoe->netdev);
1780 real_dev = fcoe->netdev;
1782 if (netdev == real_dev)
1788 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1789 ulong event, void *ptr)
1791 struct dcb_app_type *entry = ptr;
1792 struct fcoe_ctlr *ctlr;
1793 struct fcoe_interface *fcoe;
1794 struct net_device *netdev;
1797 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1800 netdev = dev_get_by_index(&init_net, entry->ifindex);
1804 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1809 ctlr = fcoe_to_ctlr(fcoe);
1811 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1812 prio = ffs(entry->app.priority) - 1;
1814 prio = entry->app.priority;
1819 if (entry->app.protocol == ETH_P_FIP ||
1820 entry->app.protocol == ETH_P_FCOE)
1821 ctlr->priority = prio;
1823 if (entry->app.protocol == ETH_P_FCOE)
1824 fcoe->priority = prio;
1830 * fcoe_device_notification() - Handler for net device events
1831 * @notifier: The context of the notification
1832 * @event: The type of event
1833 * @ptr: The net device that the event was on
1835 * This function is called by the Ethernet driver in case of link change event.
1837 * Returns: 0 for success
1839 static int fcoe_device_notification(struct notifier_block *notifier,
1840 ulong event, void *ptr)
1842 struct fcoe_ctlr_device *cdev;
1843 struct fc_lport *lport = NULL;
1844 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1845 struct fcoe_ctlr *ctlr;
1846 struct fcoe_interface *fcoe;
1847 struct fc_stats *stats;
1848 u32 link_possible = 1;
1852 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1853 if (fcoe->netdev == netdev) {
1854 ctlr = fcoe_to_ctlr(fcoe);
1866 case NETDEV_GOING_DOWN:
1872 case NETDEV_CHANGEMTU:
1873 if (netdev->features & NETIF_F_FCOE_MTU)
1875 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1876 sizeof(struct fcoe_crc_eof));
1877 if (mfs >= FC_MIN_MAX_FRAME)
1878 fc_set_mfs(lport, mfs);
1880 case NETDEV_REGISTER:
1882 case NETDEV_UNREGISTER:
1883 list_del(&fcoe->list);
1884 fcoe_vport_remove(lport);
1885 mutex_lock(&fcoe_config_mutex);
1886 fcoe_if_destroy(lport);
1888 fcoe_interface_remove(fcoe);
1889 fcoe_interface_cleanup(fcoe);
1890 mutex_unlock(&fcoe_config_mutex);
1891 fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr));
1894 case NETDEV_FEAT_CHANGE:
1895 fcoe_netdev_features_change(lport, netdev);
1898 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1899 "from netdev netlink\n", event);
1902 fcoe_link_speed_update(lport);
1904 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
1906 if (link_possible && !fcoe_link_ok(lport)) {
1907 switch (cdev->enabled) {
1908 case FCOE_CTLR_DISABLED:
1909 pr_info("Link up while interface is disabled.\n");
1911 case FCOE_CTLR_ENABLED:
1912 case FCOE_CTLR_UNUSED:
1913 fcoe_ctlr_link_up(ctlr);
1915 } else if (fcoe_ctlr_link_down(ctlr)) {
1916 switch (cdev->enabled) {
1917 case FCOE_CTLR_DISABLED:
1918 pr_info("Link down while interface is disabled.\n");
1920 case FCOE_CTLR_ENABLED:
1921 case FCOE_CTLR_UNUSED:
1922 stats = per_cpu_ptr(lport->stats, get_cpu());
1923 stats->LinkFailureCount++;
1925 fcoe_clean_pending_queue(lport);
1933 * fcoe_disable() - Disables a FCoE interface
1934 * @netdev : The net_device object the Ethernet interface to create on
1936 * Called from fcoe transport.
1938 * Returns: 0 for success
1940 * Deprecated: use fcoe_ctlr_enabled()
1942 static int fcoe_disable(struct net_device *netdev)
1944 struct fcoe_ctlr *ctlr;
1945 struct fcoe_interface *fcoe;
1948 mutex_lock(&fcoe_config_mutex);
1951 fcoe = fcoe_hostlist_lookup_port(netdev);
1955 ctlr = fcoe_to_ctlr(fcoe);
1956 fcoe_ctlr_link_down(ctlr);
1957 fcoe_clean_pending_queue(ctlr->lp);
1961 mutex_unlock(&fcoe_config_mutex);
1966 * fcoe_enable() - Enables a FCoE interface
1967 * @netdev : The net_device object the Ethernet interface to create on
1969 * Called from fcoe transport.
1971 * Returns: 0 for success
1973 static int fcoe_enable(struct net_device *netdev)
1975 struct fcoe_ctlr *ctlr;
1976 struct fcoe_interface *fcoe;
1979 mutex_lock(&fcoe_config_mutex);
1981 fcoe = fcoe_hostlist_lookup_port(netdev);
1989 ctlr = fcoe_to_ctlr(fcoe);
1991 if (!fcoe_link_ok(ctlr->lp))
1992 fcoe_ctlr_link_up(ctlr);
1995 mutex_unlock(&fcoe_config_mutex);
2000 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
2001 * @cdev: The FCoE Controller that is being enabled or disabled
2003 * fcoe_sysfs will ensure that the state of 'enabled' has
2004 * changed, so no checking is necessary here. This routine simply
2005 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
2006 * When those routines are removed the functionality can be merged
2009 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
2011 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
2012 struct fc_lport *lport = ctlr->lp;
2013 struct net_device *netdev = fcoe_netdev(lport);
2015 switch (cdev->enabled) {
2016 case FCOE_CTLR_ENABLED:
2017 return fcoe_enable(netdev);
2018 case FCOE_CTLR_DISABLED:
2019 return fcoe_disable(netdev);
2020 case FCOE_CTLR_UNUSED:
2027 * fcoe_ctlr_mode() - Switch FIP mode
2028 * @cdev: The FCoE Controller that is being modified
2030 * When the FIP mode has been changed we need to update
2031 * the multicast addresses to ensure we get the correct
2034 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev)
2036 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2037 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2039 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN &&
2040 ctlr->mode != FIP_MODE_VN2VN) {
2041 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS);
2042 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2043 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS);
2044 } else if (ctlr->mode != FIP_MODE_FABRIC) {
2045 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2046 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS);
2047 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS);
2049 fcoe_ctlr_set_fip_mode(ctlr_dev);
2053 * fcoe_destroy() - Destroy a FCoE interface
2054 * @netdev : The net_device object the Ethernet interface to create on
2056 * Called from fcoe transport
2058 * Returns: 0 for success
2060 static int fcoe_destroy(struct net_device *netdev)
2062 struct fcoe_ctlr *ctlr;
2063 struct fcoe_interface *fcoe;
2064 struct fc_lport *lport;
2065 struct fcoe_port *port;
2068 mutex_lock(&fcoe_config_mutex);
2070 fcoe = fcoe_hostlist_lookup_port(netdev);
2075 ctlr = fcoe_to_ctlr(fcoe);
2077 port = lport_priv(lport);
2078 list_del(&fcoe->list);
2079 queue_work(fcoe_wq, &port->destroy_work);
2082 mutex_unlock(&fcoe_config_mutex);
2087 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2088 * @work: Handle to the FCoE port to be destroyed
2090 static void fcoe_destroy_work(struct work_struct *work)
2092 struct fcoe_ctlr_device *cdev;
2093 struct fcoe_ctlr *ctlr;
2094 struct fcoe_port *port;
2095 struct fcoe_interface *fcoe;
2097 port = container_of(work, struct fcoe_port, destroy_work);
2099 fcoe_vport_remove(port->lport);
2101 mutex_lock(&fcoe_config_mutex);
2104 ctlr = fcoe_to_ctlr(fcoe);
2105 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2108 fcoe_if_destroy(port->lport);
2110 fcoe_interface_remove(fcoe);
2112 fcoe_interface_cleanup(fcoe);
2114 mutex_unlock(&fcoe_config_mutex);
2116 fcoe_ctlr_device_delete(cdev);
2120 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2121 * @netdev : The net_device object the Ethernet interface to create on
2123 * Called from fcoe transport.
2125 * Returns: always returns true as this is the default FCoE transport,
2126 * i.e., support all netdevs.
2128 static bool fcoe_match(struct net_device *netdev)
2134 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2135 * @netdev: The net_device object of the L2 link that should be queried
2136 * @port: The fcoe_port to bind FCoE APP priority with
2139 static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2141 int ctlr_prio = TC_PRIO_BESTEFFORT;
2142 int fcoe_prio = TC_PRIO_INTERACTIVE;
2143 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2147 struct net_device *netdev = fcoe->realdev;
2148 struct dcb_app app = {
2150 .protocol = ETH_P_FCOE
2153 /* setup DCB priority attributes. */
2154 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2155 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2157 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2158 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2159 up = dcb_ieee_getapp_mask(netdev, &app);
2160 app.protocol = ETH_P_FIP;
2161 fup = dcb_ieee_getapp_mask(netdev, &app);
2163 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2164 up = dcb_getapp(netdev, &app);
2165 app.protocol = ETH_P_FIP;
2166 fup = dcb_getapp(netdev, &app);
2169 fcoe_prio = ffs(up) ? ffs(up) - 1 : 0;
2170 ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio;
2173 fcoe->priority = fcoe_prio;
2174 ctlr->priority = ctlr_prio;
2177 enum fcoe_create_link_state {
2178 FCOE_CREATE_LINK_DOWN,
2179 FCOE_CREATE_LINK_UP,
2183 * _fcoe_create() - (internal) Create a fcoe interface
2184 * @netdev : The net_device object the Ethernet interface to create on
2185 * @fip_mode: The FIP mode for this creation
2186 * @link_state: The ctlr link state on creation
2188 * Called from either the libfcoe 'create' module parameter
2189 * via fcoe_create or from fcoe_syfs's ctlr_create file.
2191 * libfcoe's 'create' module parameter is deprecated so some
2192 * consolidation of code can be done when that interface is
2195 static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode,
2196 enum fcoe_create_link_state link_state)
2199 struct fcoe_ctlr_device *ctlr_dev;
2200 struct fcoe_ctlr *ctlr;
2201 struct fcoe_interface *fcoe;
2202 struct fc_lport *lport;
2204 mutex_lock(&fcoe_config_mutex);
2207 /* look for existing lport */
2208 if (fcoe_hostlist_lookup(netdev)) {
2213 fcoe = fcoe_interface_create(netdev, fip_mode);
2219 ctlr = fcoe_to_ctlr(fcoe);
2220 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2221 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
2222 if (IS_ERR(lport)) {
2223 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2227 fcoe_interface_remove(fcoe);
2229 fcoe_interface_cleanup(fcoe);
2230 mutex_unlock(&fcoe_config_mutex);
2231 fcoe_ctlr_device_delete(ctlr_dev);
2235 /* Make this the "master" N_Port */
2238 /* setup DCB priority attributes. */
2239 fcoe_dcb_create(fcoe);
2241 /* start FIP Discovery and FLOGI */
2242 lport->boot_time = jiffies;
2243 fc_fabric_login(lport);
2246 * If the fcoe_ctlr_device is to be set to DISABLED
2247 * it must be done after the lport is added to the
2248 * hostlist, but before the rtnl_lock is released.
2249 * This is because the rtnl_lock protects the
2250 * hostlist that fcoe_device_notification uses. If
2251 * the FCoE Controller is intended to be created
2252 * DISABLED then 'enabled' needs to be considered
2253 * handling link events. 'enabled' must be set
2254 * before the lport can be found in the hostlist
2255 * when a link up event is received.
2257 if (link_state == FCOE_CREATE_LINK_UP)
2258 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2260 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2262 if (link_state == FCOE_CREATE_LINK_UP &&
2263 !fcoe_link_ok(lport)) {
2265 fcoe_ctlr_link_up(ctlr);
2266 mutex_unlock(&fcoe_config_mutex);
2272 mutex_unlock(&fcoe_config_mutex);
2278 * fcoe_create() - Create a fcoe interface
2279 * @netdev : The net_device object the Ethernet interface to create on
2280 * @fip_mode: The FIP mode for this creation
2282 * Called from fcoe transport
2284 * Returns: 0 for success
2286 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode)
2288 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2292 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2293 * @netdev: The net_device to be used by the allocated FCoE Controller
2295 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2296 * in a link_down state. The allows the user an opportunity to configure
2297 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2299 * Creating in with this routine starts the FCoE Controller in Fabric
2300 * mode. The user can change to VN2VN or another mode before enabling.
2302 static int fcoe_ctlr_alloc(struct net_device *netdev)
2304 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2305 FCOE_CREATE_LINK_DOWN);
2309 * fcoe_link_ok() - Check if the link is OK for a local port
2310 * @lport: The local port to check link on
2312 * Returns: 0 if link is UP and OK, -1 if not
2315 static int fcoe_link_ok(struct fc_lport *lport)
2317 struct net_device *netdev = fcoe_netdev(lport);
2319 if (netif_oper_up(netdev))
2325 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2326 * @lport: The local port whose skbs are to be cleared
2328 * Must be called with fcoe_create_mutex held to single-thread completion.
2330 * This flushes the pending skbs by flush the work item for each CPU. The work
2331 * item on each possible CPU is flushed because we may have used the per-CPU
2332 * struct of an offline CPU.
2334 static void fcoe_percpu_clean(struct fc_lport *lport)
2336 struct fcoe_percpu_s *pp;
2339 for_each_possible_cpu(cpu) {
2340 pp = &per_cpu(fcoe_percpu, cpu);
2342 flush_work(&pp->work);
2347 * fcoe_reset() - Reset a local port
2348 * @shost: The SCSI host associated with the local port to be reset
2350 * Returns: Always 0 (return value required by FC transport template)
2352 static int fcoe_reset(struct Scsi_Host *shost)
2354 struct fc_lport *lport = shost_priv(shost);
2355 struct fcoe_port *port = lport_priv(lport);
2356 struct fcoe_interface *fcoe = port->priv;
2357 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2358 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2360 fcoe_ctlr_link_down(ctlr);
2361 fcoe_clean_pending_queue(ctlr->lp);
2363 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2364 !fcoe_link_ok(ctlr->lp))
2365 fcoe_ctlr_link_up(ctlr);
2370 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2371 * @netdev: The net device used as a key
2373 * Locking: Must be called with the RNL mutex held.
2375 * Returns: NULL or the FCoE interface
2377 static struct fcoe_interface *
2378 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2380 struct fcoe_interface *fcoe;
2382 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2383 if (fcoe->netdev == netdev)
2390 * fcoe_hostlist_lookup() - Find the local port associated with a
2392 * @netdev: The netdevice used as a key
2394 * Locking: Must be called with the RTNL mutex held
2396 * Returns: NULL or the local port
2398 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2400 struct fcoe_ctlr *ctlr;
2401 struct fcoe_interface *fcoe;
2403 fcoe = fcoe_hostlist_lookup_port(netdev);
2404 ctlr = fcoe_to_ctlr(fcoe);
2405 return (fcoe) ? ctlr->lp : NULL;
2409 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2410 * port to the hostlist
2411 * @lport: The local port that identifies the FCoE interface to be added
2413 * Locking: must be called with the RTNL mutex held
2415 * Returns: 0 for success
2417 static int fcoe_hostlist_add(const struct fc_lport *lport)
2419 struct fcoe_interface *fcoe;
2420 struct fcoe_port *port;
2422 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2424 port = lport_priv(lport);
2426 list_add_tail(&fcoe->list, &fcoe_hostlist);
2432 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2433 * port to the hostlist
2434 * @lport: The local port that identifies the FCoE interface to be added
2436 * Locking: must be called with the RTNL mutex held
2439 static void fcoe_hostlist_del(const struct fc_lport *lport)
2441 struct fcoe_interface *fcoe;
2442 struct fcoe_port *port;
2444 port = lport_priv(lport);
2446 list_del(&fcoe->list);
2450 static struct fcoe_transport fcoe_sw_transport = {
2451 .name = {FCOE_TRANSPORT_DEFAULT},
2453 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2454 .match = fcoe_match,
2455 .alloc = fcoe_ctlr_alloc,
2456 .create = fcoe_create,
2457 .destroy = fcoe_destroy,
2458 .enable = fcoe_enable,
2459 .disable = fcoe_disable,
2463 * fcoe_init() - Initialize fcoe.ko
2465 * Returns: 0 on success, or a negative value on failure
2467 static int __init fcoe_init(void)
2469 struct fcoe_percpu_s *p;
2473 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2477 /* register as a fcoe transport */
2478 rc = fcoe_transport_attach(&fcoe_sw_transport);
2480 printk(KERN_ERR "failed to register an fcoe transport, check "
2481 "if libfcoe is loaded\n");
2485 mutex_lock(&fcoe_config_mutex);
2487 for_each_possible_cpu(cpu) {
2488 p = per_cpu_ptr(&fcoe_percpu, cpu);
2489 INIT_WORK(&p->work, fcoe_receive_work);
2490 skb_queue_head_init(&p->fcoe_rx_list);
2493 /* Setup link change notification */
2496 rc = fcoe_if_init();
2500 mutex_unlock(&fcoe_config_mutex);
2504 mutex_unlock(&fcoe_config_mutex);
2506 destroy_workqueue(fcoe_wq);
2509 module_init(fcoe_init);
2512 * fcoe_exit() - Clean up fcoe.ko
2514 * Returns: 0 on success or a negative value on failure
2516 static void __exit fcoe_exit(void)
2518 struct fcoe_interface *fcoe, *tmp;
2519 struct fcoe_ctlr *ctlr;
2520 struct fcoe_port *port;
2523 mutex_lock(&fcoe_config_mutex);
2527 /* releases the associated fcoe hosts */
2529 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2530 ctlr = fcoe_to_ctlr(fcoe);
2531 port = lport_priv(ctlr->lp);
2532 fcoe_hostlist_del(port->lport);
2533 queue_work(fcoe_wq, &port->destroy_work);
2537 for_each_possible_cpu(cpu)
2538 fcoe_thread_cleanup_local(cpu);
2540 mutex_unlock(&fcoe_config_mutex);
2543 * destroy_work's may be chained but destroy_workqueue()
2544 * can take care of them. Just kill the fcoe_wq.
2546 destroy_workqueue(fcoe_wq);
2549 * Detaching from the scsi transport must happen after all
2550 * destroys are done on the fcoe_wq. destroy_workqueue will
2551 * enusre the fcoe_wq is flushed.
2555 /* detach from fcoe transport */
2556 fcoe_transport_detach(&fcoe_sw_transport);
2558 module_exit(fcoe_exit);
2561 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2562 * @seq: active sequence in the FLOGI or FDISC exchange
2563 * @fp: response frame, or error encoded in a pointer (timeout)
2564 * @arg: pointer to the fcoe_ctlr structure
2566 * This handles MAC address management for FCoE, then passes control on to
2567 * the libfc FLOGI response handler.
2569 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2571 struct fcoe_ctlr *fip = arg;
2572 struct fc_exch *exch = fc_seq_exch(seq);
2573 struct fc_lport *lport = exch->lp;
2579 mac = fr_cb(fp)->granted_mac;
2581 if (is_zero_ether_addr(mac))
2582 fcoe_ctlr_recv_flogi(fip, lport, fp);
2583 if (!is_zero_ether_addr(mac))
2584 fcoe_update_src_mac(lport, mac);
2586 fc_lport_flogi_resp(seq, fp, lport);
2590 * fcoe_logo_resp() - FCoE specific LOGO response handler
2591 * @seq: active sequence in the LOGO exchange
2592 * @fp: response frame, or error encoded in a pointer (timeout)
2593 * @arg: pointer to the fcoe_ctlr structure
2595 * This handles MAC address management for FCoE, then passes control on to
2596 * the libfc LOGO response handler.
2598 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2600 struct fc_lport *lport = arg;
2601 static u8 zero_mac[ETH_ALEN] = { 0 };
2604 fcoe_update_src_mac(lport, zero_mac);
2605 fc_lport_logo_resp(seq, fp, lport);
2609 * fcoe_elsct_send - FCoE specific ELS handler
2611 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2612 * using FCoE specific response handlers and passing the FIP controller as
2613 * the argument (the lport is still available from the exchange).
2615 * Most of the work here is just handed off to the libfc routine.
2617 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2618 struct fc_frame *fp, unsigned int op,
2619 void (*resp)(struct fc_seq *,
2622 void *arg, u32 timeout)
2624 struct fcoe_port *port = lport_priv(lport);
2625 struct fcoe_interface *fcoe = port->priv;
2626 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
2627 struct fc_frame_header *fh = fc_frame_header_get(fp);
2632 if (lport->point_to_multipoint)
2634 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2637 /* only hook onto fabric logouts, not port logouts */
2638 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2640 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2643 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2647 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2648 * @vport: fc_vport object to create a new fc_host for
2649 * @disabled: start the new fc_host in a disabled state by default?
2651 * Returns: 0 for success
2653 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2655 struct Scsi_Host *shost = vport_to_shost(vport);
2656 struct fc_lport *n_port = shost_priv(shost);
2657 struct fcoe_port *port = lport_priv(n_port);
2658 struct fcoe_interface *fcoe = port->priv;
2659 struct net_device *netdev = fcoe->netdev;
2660 struct fc_lport *vn_port;
2664 rc = fcoe_validate_vport_create(vport);
2666 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2667 printk(KERN_ERR "fcoe: Failed to create vport, "
2668 "WWPN (0x%s) already exists\n",
2673 mutex_lock(&fcoe_config_mutex);
2675 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2677 mutex_unlock(&fcoe_config_mutex);
2679 if (IS_ERR(vn_port)) {
2680 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2686 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2688 vn_port->boot_time = jiffies;
2689 fc_fabric_login(vn_port);
2690 fc_vport_setlink(vn_port);
2696 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2697 * @vport: fc_vport object that is being destroyed
2699 * Returns: 0 for success
2701 static int fcoe_vport_destroy(struct fc_vport *vport)
2703 struct Scsi_Host *shost = vport_to_shost(vport);
2704 struct fc_lport *n_port = shost_priv(shost);
2705 struct fc_lport *vn_port = vport->dd_data;
2707 mutex_lock(&n_port->lp_mutex);
2708 list_del(&vn_port->list);
2709 mutex_unlock(&n_port->lp_mutex);
2711 mutex_lock(&fcoe_config_mutex);
2713 fcoe_if_destroy(vn_port);
2715 mutex_unlock(&fcoe_config_mutex);
2721 * fcoe_vport_remove() - remove attached vports
2722 * @lport: lport for which the vports should be removed
2724 static void fcoe_vport_remove(struct fc_lport *lport)
2726 struct Scsi_Host *shost;
2727 struct fc_host_attrs *fc_host;
2728 unsigned long flags;
2729 struct fc_vport *vport;
2730 struct fc_vport *next_vport;
2732 shost = lport->host;
2733 fc_host = shost_to_fc_host(shost);
2735 /* Loop through all the vports and mark them for deletion */
2736 spin_lock_irqsave(shost->host_lock, flags);
2737 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2738 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2741 vport->flags |= FC_VPORT_DELETING;
2742 queue_work(fc_host_work_q(shost),
2743 &vport->vport_delete_work);
2746 spin_unlock_irqrestore(shost->host_lock, flags);
2748 flush_workqueue(fc_host_work_q(shost));
2752 * fcoe_vport_disable() - change vport state
2753 * @vport: vport to bring online/offline
2754 * @disable: should the vport be disabled?
2756 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2758 struct fc_lport *lport = vport->dd_data;
2761 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2762 fc_fabric_logoff(lport);
2764 lport->boot_time = jiffies;
2765 fc_fabric_login(lport);
2766 fc_vport_setlink(lport);
2773 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2774 * @vport: fc_vport with a new symbolic name string
2776 * After generating a new symbolic name string, a new RSPN_ID request is
2777 * sent to the name server. There is no response handler, so if it fails
2778 * for some reason it will not be retried.
2780 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2782 struct fc_lport *lport = vport->dd_data;
2783 struct fc_frame *fp;
2786 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2787 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2788 fcoe_netdev(lport)->name, vport->symbolic_name);
2790 if (lport->state != LPORT_ST_READY)
2793 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2794 fp = fc_frame_alloc(lport,
2795 sizeof(struct fc_ct_hdr) +
2796 sizeof(struct fc_ns_rspn) + len);
2799 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2800 NULL, NULL, 3 * lport->r_a_tov);
2803 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2805 struct fcoe_ctlr_device *ctlr_dev =
2806 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2807 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2808 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2810 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2814 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2815 * @lport: the local port
2816 * @port_id: the port ID
2817 * @fp: the received frame, if any, that caused the port_id to be set.
2819 * This routine handles the case where we received a FLOGI and are
2820 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2821 * so it can set the non-mapped mode and gateway address.
2823 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2825 static void fcoe_set_port_id(struct fc_lport *lport,
2826 u32 port_id, struct fc_frame *fp)
2828 struct fcoe_port *port = lport_priv(lport);
2829 struct fcoe_interface *fcoe = port->priv;
2830 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2832 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2833 fcoe_ctlr_recv_flogi(ctlr, lport, fp);