blob: c8a4305c76622a1ed5055ab0cb3d71370760d86c [file] [log] [blame]
Robert Love85b4aa42008-12-09 15:10:24 -08001/*
Chris Leechaf7f85d2009-08-25 13:59:24 -07002 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
Robert Love85b4aa42008-12-09 15:10:24 -08003 *
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.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
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.
16 *
17 * Maintained at www.Open-FCoE.org
18 */
19
20#include <linux/module.h>
Robert Love85b4aa42008-12-09 15:10:24 -080021#include <linux/spinlock.h>
Robert Love85b4aa42008-12-09 15:10:24 -080022#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>
Robert Love85b4aa42008-12-09 15:10:24 -080027#include <linux/crc32.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090028#include <linux/slab.h>
Robert Love85b4aa42008-12-09 15:10:24 -080029#include <linux/cpu.h>
30#include <linux/fs.h>
31#include <linux/sysfs.h>
32#include <linux/ctype.h>
Tejun Heo2ca32b42011-01-28 16:05:32 -080033#include <linux/workqueue.h>
john fastabend6f6c2aa2011-11-18 13:35:56 -080034#include <net/dcbnl.h>
35#include <net/dcbevent.h>
Robert Love85b4aa42008-12-09 15:10:24 -080036#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>
41
42#include <scsi/fc/fc_encaps.h>
Joe Eykholt97c83892009-03-17 11:42:40 -070043#include <scsi/fc/fc_fip.h>
Robert Love8d55e502012-05-22 19:06:26 -070044#include <scsi/fc/fc_fcoe.h>
Robert Love85b4aa42008-12-09 15:10:24 -080045
46#include <scsi/libfc.h>
47#include <scsi/fc_frame.h>
48#include <scsi/libfcoe.h>
Robert Love85b4aa42008-12-09 15:10:24 -080049
Vasu Devfdd780272009-03-17 11:42:24 -070050#include "fcoe.h"
51
Robert Love85b4aa42008-12-09 15:10:24 -080052MODULE_AUTHOR("Open-FCoE.org");
53MODULE_DESCRIPTION("FCoE");
Vasu Dev9b34ecf2009-03-17 11:42:13 -070054MODULE_LICENSE("GPL v2");
Robert Love85b4aa42008-12-09 15:10:24 -080055
Yi Zou05cc7392009-08-25 13:59:03 -070056/* Performance tuning parameters for fcoe */
Vasu Dev860eca22011-09-27 21:38:18 -070057static unsigned int fcoe_ddp_min = 4096;
Yi Zou05cc7392009-08-25 13:59:03 -070058module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
59MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
60 "Direct Data Placement (DDP).");
61
Bart Van Assche7c9c6842012-01-13 17:26:25 -080062unsigned int fcoe_debug_logging;
63module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
64MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
65
66static DEFINE_MUTEX(fcoe_config_mutex);
Chris Leechdfc1d0f2009-08-25 14:00:13 -070067
Tejun Heo2ca32b42011-01-28 16:05:32 -080068static struct workqueue_struct *fcoe_wq;
69
Robert Love85b4aa42008-12-09 15:10:24 -080070/* fcoe host list */
Chris Leech090eb6c2009-08-25 14:00:28 -070071/* must only by accessed under the RTNL mutex */
Bart Van Assche7c9c6842012-01-13 17:26:25 -080072static LIST_HEAD(fcoe_hostlist);
73static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
Robert Love85b4aa42008-12-09 15:10:24 -080074
Chris Leechdd3fd722009-04-21 16:27:36 -070075/* Function Prototypes */
Robert Love1875f272009-11-03 11:47:50 -080076static int fcoe_reset(struct Scsi_Host *);
Vasu Devfdd780272009-03-17 11:42:24 -070077static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
78static int fcoe_rcv(struct sk_buff *, struct net_device *,
79 struct packet_type *, struct net_device *);
Robert Love1875f272009-11-03 11:47:50 -080080static void fcoe_percpu_clean(struct fc_lport *);
81static int fcoe_link_ok(struct fc_lport *);
Vasu Devfdd780272009-03-17 11:42:24 -070082
83static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
84static int fcoe_hostlist_add(const struct fc_lport *);
Neil Hormanf9184df2013-01-15 14:34:40 -050085static void fcoe_hostlist_del(const struct fc_lport *);
Vasu Devfdd780272009-03-17 11:42:24 -070086
Robert Love85b4aa42008-12-09 15:10:24 -080087static int fcoe_device_notification(struct notifier_block *, ulong, void *);
88static void fcoe_dev_setup(void);
89static void fcoe_dev_cleanup(void);
Robert Love1875f272009-11-03 11:47:50 -080090static struct fcoe_interface
91*fcoe_hostlist_lookup_port(const struct net_device *);
Robert Love85b4aa42008-12-09 15:10:24 -080092
Robert Love1875f272009-11-03 11:47:50 -080093static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
94 struct packet_type *, struct net_device *);
95
96static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
97static void fcoe_update_src_mac(struct fc_lport *, u8 *);
98static u8 *fcoe_get_src_mac(struct fc_lport *);
99static void fcoe_destroy_work(struct work_struct *);
100
101static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
102 unsigned int);
103static int fcoe_ddp_done(struct fc_lport *, u16);
Yi Zou71f89492011-06-20 16:59:10 -0700104static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
105 unsigned int);
john fastabend6f6c2aa2011-11-18 13:35:56 -0800106static int fcoe_dcb_app_notification(struct notifier_block *notifier,
107 ulong event, void *ptr);
Robert Love1875f272009-11-03 11:47:50 -0800108
Yi Zou78a58242011-01-28 16:05:16 -0800109static bool fcoe_match(struct net_device *netdev);
Hannes Reinecke1917d422016-07-04 10:29:19 +0200110static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode);
Yi Zou78a58242011-01-28 16:05:16 -0800111static int fcoe_destroy(struct net_device *netdev);
112static int fcoe_enable(struct net_device *netdev);
113static int fcoe_disable(struct net_device *netdev);
Robert Love1875f272009-11-03 11:47:50 -0800114
Robert Love435c8662012-11-27 06:53:35 +0000115/* fcoe_syfs control interface handlers */
116static int fcoe_ctlr_alloc(struct net_device *netdev);
117static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
Hannes Reineckea87dccc2016-07-04 10:29:21 +0200118static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev);
Robert Love435c8662012-11-27 06:53:35 +0000119
Robert Love1875f272009-11-03 11:47:50 -0800120static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
121 u32 did, struct fc_frame *,
122 unsigned int op,
123 void (*resp)(struct fc_seq *,
124 struct fc_frame *,
125 void *),
126 void *, u32 timeout);
Chris Leech859b7b62009-11-20 14:54:47 -0800127static void fcoe_recv_frame(struct sk_buff *skb);
Robert Love1875f272009-11-03 11:47:50 -0800128
Robert Love1875f272009-11-03 11:47:50 -0800129/* notification function for packets from net device */
Robert Love85b4aa42008-12-09 15:10:24 -0800130static struct notifier_block fcoe_notifier = {
131 .notifier_call = fcoe_device_notification,
132};
133
john fastabend6f6c2aa2011-11-18 13:35:56 -0800134/* notification function for DCB events */
135static struct notifier_block dcb_notifier = {
136 .notifier_call = fcoe_dcb_app_notification,
137};
138
Yi Zou8ca86f82011-01-28 16:05:11 -0800139static struct scsi_transport_template *fcoe_nport_scsi_transport;
140static struct scsi_transport_template *fcoe_vport_scsi_transport;
Vasu Dev7f349142009-03-27 09:06:31 -0700141
Robert Love1875f272009-11-03 11:47:50 -0800142static int fcoe_vport_destroy(struct fc_vport *);
143static int fcoe_vport_create(struct fc_vport *, bool disabled);
144static int fcoe_vport_disable(struct fc_vport *, bool disable);
145static void fcoe_set_vport_symbolic_name(struct fc_vport *);
Joe Eykholt7d65b0d2010-03-12 16:08:02 -0800146static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
Robert Love8d55e502012-05-22 19:06:26 -0700147static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
148
Hannes Reineckea87dccc2016-07-04 10:29:21 +0200149
Robert Love8d55e502012-05-22 19:06:26 -0700150static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
Hannes Reineckea87dccc2016-07-04 10:29:21 +0200151 .set_fcoe_ctlr_mode = fcoe_ctlr_mode,
Robert Love435c8662012-11-27 06:53:35 +0000152 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
Robert Love8d55e502012-05-22 19:06:26 -0700153 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
154 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
155 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
156 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
157 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
158 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
159
160 .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
161 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
162};
Robert Love1875f272009-11-03 11:47:50 -0800163
164static struct libfc_function_template fcoe_libfc_fcn_templ = {
165 .frame_send = fcoe_xmit,
166 .ddp_setup = fcoe_ddp_setup,
167 .ddp_done = fcoe_ddp_done,
Yi Zou71f89492011-06-20 16:59:10 -0700168 .ddp_target = fcoe_ddp_target,
Robert Love1875f272009-11-03 11:47:50 -0800169 .elsct_send = fcoe_elsct_send,
Yi Zoub84056b2009-11-20 14:55:19 -0800170 .get_lesb = fcoe_get_lesb,
Joe Eykholt7d65b0d2010-03-12 16:08:02 -0800171 .lport_set_port_id = fcoe_set_port_id,
Robert Love1875f272009-11-03 11:47:50 -0800172};
Chris Leech9a057532009-11-03 11:46:40 -0800173
Bart Van Assche7c9c6842012-01-13 17:26:25 -0800174static struct fc_function_template fcoe_nport_fc_functions = {
Vasu Dev7f349142009-03-27 09:06:31 -0700175 .show_host_node_name = 1,
176 .show_host_port_name = 1,
177 .show_host_supported_classes = 1,
178 .show_host_supported_fc4s = 1,
179 .show_host_active_fc4s = 1,
180 .show_host_maxframe_size = 1,
Neerav Parikh9f71af22012-01-22 17:30:16 -0800181 .show_host_serial_number = 1,
182 .show_host_manufacturer = 1,
183 .show_host_model = 1,
184 .show_host_model_description = 1,
185 .show_host_hardware_version = 1,
186 .show_host_driver_version = 1,
187 .show_host_firmware_version = 1,
188 .show_host_optionrom_version = 1,
Vasu Dev7f349142009-03-27 09:06:31 -0700189
190 .show_host_port_id = 1,
191 .show_host_supported_speeds = 1,
192 .get_host_speed = fc_get_host_speed,
193 .show_host_speed = 1,
194 .show_host_port_type = 1,
195 .get_host_port_state = fc_get_host_port_state,
196 .show_host_port_state = 1,
197 .show_host_symbolic_name = 1,
198
199 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
200 .show_rport_maxframe_size = 1,
201 .show_rport_supported_classes = 1,
202
203 .show_host_fabric_name = 1,
204 .show_starget_node_name = 1,
205 .show_starget_port_name = 1,
206 .show_starget_port_id = 1,
207 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
208 .show_rport_dev_loss_tmo = 1,
209 .get_fc_host_stats = fc_get_host_stats,
210 .issue_fc_host_lip = fcoe_reset,
211
212 .terminate_rport_io = fc_rport_terminate_io,
Chris Leech9a057532009-11-03 11:46:40 -0800213
214 .vport_create = fcoe_vport_create,
215 .vport_delete = fcoe_vport_destroy,
216 .vport_disable = fcoe_vport_disable,
Chris Leechdc8596d2009-11-03 11:47:18 -0800217 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
Steve Maa51ab392009-11-03 11:47:34 -0800218
219 .bsg_request = fc_lport_bsg_request,
Vasu Dev7f349142009-03-27 09:06:31 -0700220};
221
Bart Van Assche7c9c6842012-01-13 17:26:25 -0800222static struct fc_function_template fcoe_vport_fc_functions = {
Chris Leeche9084bb2009-11-03 11:46:34 -0800223 .show_host_node_name = 1,
224 .show_host_port_name = 1,
225 .show_host_supported_classes = 1,
226 .show_host_supported_fc4s = 1,
227 .show_host_active_fc4s = 1,
228 .show_host_maxframe_size = 1,
Neerav Parikh7e5adcf2012-02-10 17:18:31 -0800229 .show_host_serial_number = 1,
230 .show_host_manufacturer = 1,
231 .show_host_model = 1,
232 .show_host_model_description = 1,
233 .show_host_hardware_version = 1,
234 .show_host_driver_version = 1,
235 .show_host_firmware_version = 1,
236 .show_host_optionrom_version = 1,
Chris Leeche9084bb2009-11-03 11:46:34 -0800237
238 .show_host_port_id = 1,
239 .show_host_supported_speeds = 1,
240 .get_host_speed = fc_get_host_speed,
241 .show_host_speed = 1,
242 .show_host_port_type = 1,
243 .get_host_port_state = fc_get_host_port_state,
244 .show_host_port_state = 1,
245 .show_host_symbolic_name = 1,
246
247 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
248 .show_rport_maxframe_size = 1,
249 .show_rport_supported_classes = 1,
250
251 .show_host_fabric_name = 1,
252 .show_starget_node_name = 1,
253 .show_starget_port_name = 1,
254 .show_starget_port_id = 1,
255 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
256 .show_rport_dev_loss_tmo = 1,
257 .get_fc_host_stats = fc_get_host_stats,
258 .issue_fc_host_lip = fcoe_reset,
259
260 .terminate_rport_io = fc_rport_terminate_io,
Steve Maa51ab392009-11-03 11:47:34 -0800261
262 .bsg_request = fc_lport_bsg_request,
Chris Leeche9084bb2009-11-03 11:46:34 -0800263};
264
Vasu Dev7f349142009-03-27 09:06:31 -0700265static struct scsi_host_template fcoe_shost_template = {
266 .module = THIS_MODULE,
267 .name = "FCoE Driver",
268 .proc_name = FCOE_NAME,
269 .queuecommand = fc_queuecommand,
270 .eh_abort_handler = fc_eh_abort,
271 .eh_device_reset_handler = fc_eh_device_reset,
272 .eh_host_reset_handler = fc_eh_host_reset,
273 .slave_alloc = fc_slave_alloc,
Christoph Hellwigdb5ed4d2014-11-13 15:08:42 +0100274 .change_queue_depth = scsi_change_queue_depth,
Vasu Dev7f349142009-03-27 09:06:31 -0700275 .this_id = -1,
Vasu Dev14caf442009-10-15 17:46:55 -0700276 .cmd_per_lun = 3,
Vasu Dev7f349142009-03-27 09:06:31 -0700277 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
278 .use_clustering = ENABLE_CLUSTERING,
279 .sg_tablesize = SG_ALL,
280 .max_sectors = 0xffff,
Christoph Hellwigc40ecc12014-11-13 14:25:11 +0100281 .track_queue_depth = 1,
Vasu Dev7f349142009-03-27 09:06:31 -0700282};
283
Chris Leech54b649f2009-08-25 14:00:07 -0700284/**
Robert Love1875f272009-11-03 11:47:50 -0800285 * fcoe_interface_setup() - Setup a FCoE interface
286 * @fcoe: The new FCoE interface
287 * @netdev: The net device that the fcoe interface is on
Chris Leech54b649f2009-08-25 14:00:07 -0700288 *
289 * Returns : 0 for success
Chris Leech2e70e242009-08-25 14:00:23 -0700290 * Locking: must be called with the RTNL mutex held
Chris Leech54b649f2009-08-25 14:00:07 -0700291 */
292static int fcoe_interface_setup(struct fcoe_interface *fcoe,
293 struct net_device *netdev)
294{
Robert Love619fe4b2012-05-22 19:06:10 -0700295 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
Chris Leech54b649f2009-08-25 14:00:07 -0700296 struct netdev_hw_addr *ha;
Yi Zou5bab87e2009-11-03 11:49:43 -0800297 struct net_device *real_dev;
Chris Leech54b649f2009-08-25 14:00:07 -0700298 u8 flogi_maddr[ETH_ALEN];
Yi Zoub7a727f2009-10-21 16:28:03 -0700299 const struct net_device_ops *ops;
Chris Leech54b649f2009-08-25 14:00:07 -0700300
301 fcoe->netdev = netdev;
302
Yi Zoub7a727f2009-10-21 16:28:03 -0700303 /* Let LLD initialize for FCoE */
304 ops = netdev->netdev_ops;
305 if (ops->ndo_fcoe_enable) {
306 if (ops->ndo_fcoe_enable(netdev))
307 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
308 " specific feature for LLD.\n");
309 }
310
Chris Leech54b649f2009-08-25 14:00:07 -0700311 /* Do not support for bonding device */
Jiri Pirkocc8bdf02011-03-01 20:05:35 +0000312 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
john fastabend59d92512009-11-03 11:48:44 -0800313 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
Chris Leech54b649f2009-08-25 14:00:07 -0700314 return -EOPNOTSUPP;
315 }
316
317 /* look for SAN MAC address, if multiple SAN MACs exist, only
318 * use the first one for SPMA */
Yi Zou5bab87e2009-11-03 11:49:43 -0800319 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
320 vlan_dev_real_dev(netdev) : netdev;
Vasu Devd1483bb2011-09-27 21:38:13 -0700321 fcoe->realdev = real_dev;
Chris Leech54b649f2009-08-25 14:00:07 -0700322 rcu_read_lock();
Yi Zou5bab87e2009-11-03 11:49:43 -0800323 for_each_dev_addr(real_dev, ha) {
Chris Leech54b649f2009-08-25 14:00:07 -0700324 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
Yi Zoubf361702009-11-03 11:49:38 -0800325 (is_valid_ether_addr(ha->addr))) {
Chris Leech54b649f2009-08-25 14:00:07 -0700326 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
327 fip->spma = 1;
328 break;
329 }
330 }
331 rcu_read_unlock();
332
333 /* setup Source Mac Address */
334 if (!fip->spma)
335 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
336
337 /*
338 * Add FCoE MAC address as second unicast MAC address
339 * or enter promiscuous mode if not capable of listening
340 * for multiple unicast MACs.
341 */
Chris Leech54b649f2009-08-25 14:00:07 -0700342 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000343 dev_uc_add(netdev, flogi_maddr);
Chris Leech54b649f2009-08-25 14:00:07 -0700344 if (fip->spma)
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000345 dev_uc_add(netdev, fip->ctl_src_addr);
Joe Eykholte10f8c62010-07-20 15:20:30 -0700346 if (fip->mode == FIP_MODE_VN2VN) {
347 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
348 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
349 } else
350 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
Chris Leech54b649f2009-08-25 14:00:07 -0700351
352 /*
353 * setup the receive function from ethernet driver
354 * on the ethertype for the given device
355 */
356 fcoe->fcoe_packet_type.func = fcoe_rcv;
Vaishali Thakkar420fa212015-08-19 11:18:44 +0530357 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);
Chris Leech54b649f2009-08-25 14:00:07 -0700358 fcoe->fcoe_packet_type.dev = netdev;
359 dev_add_pack(&fcoe->fcoe_packet_type);
360
361 fcoe->fip_packet_type.func = fcoe_fip_recv;
362 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
363 fcoe->fip_packet_type.dev = netdev;
364 dev_add_pack(&fcoe->fip_packet_type);
365
366 return 0;
367}
368
Vasu Dev7f349142009-03-27 09:06:31 -0700369/**
Robert Love1875f272009-11-03 11:47:50 -0800370 * fcoe_interface_create() - Create a FCoE interface on a net device
371 * @netdev: The net device to create the FCoE interface on
Joe Eykholt1dd454d2010-07-20 15:20:46 -0700372 * @fip_mode: The mode to use for FIP
Chris Leech030f4e02009-08-25 14:00:02 -0700373 *
374 * Returns: pointer to a struct fcoe_interface or NULL on error
375 */
Joe Eykholt1dd454d2010-07-20 15:20:46 -0700376static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
377 enum fip_state fip_mode)
Chris Leech030f4e02009-08-25 14:00:02 -0700378{
Robert Love8d55e502012-05-22 19:06:26 -0700379 struct fcoe_ctlr_device *ctlr_dev;
Robert Love619fe4b2012-05-22 19:06:10 -0700380 struct fcoe_ctlr *ctlr;
Chris Leech030f4e02009-08-25 14:00:02 -0700381 struct fcoe_interface *fcoe;
Robert Love619fe4b2012-05-22 19:06:10 -0700382 int size;
john fastabend59d92512009-11-03 11:48:44 -0800383 int err;
Chris Leech030f4e02009-08-25 14:00:02 -0700384
Robert Love7287fb92011-01-28 16:03:47 -0800385 if (!try_module_get(THIS_MODULE)) {
386 FCOE_NETDEV_DBG(netdev,
387 "Could not get a reference to the module\n");
388 fcoe = ERR_PTR(-EBUSY);
389 goto out;
390 }
391
Robert Love619fe4b2012-05-22 19:06:10 -0700392 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
Robert Love8d55e502012-05-22 19:06:26 -0700393 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
394 size);
395 if (!ctlr_dev) {
396 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
Robert Love7287fb92011-01-28 16:03:47 -0800397 fcoe = ERR_PTR(-ENOMEM);
Robert Love6f687942012-02-10 17:18:36 -0800398 goto out_putmod;
Chris Leech030f4e02009-08-25 14:00:02 -0700399 }
400
Robert Love8d55e502012-05-22 19:06:26 -0700401 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
Robert Love9d348762013-09-05 07:47:27 +0000402 ctlr->cdev = ctlr_dev;
Robert Love8d55e502012-05-22 19:06:26 -0700403 fcoe = fcoe_ctlr_priv(ctlr);
404
Chris Leech2e70e242009-08-25 14:00:23 -0700405 dev_hold(netdev);
Chris Leech54b649f2009-08-25 14:00:07 -0700406
407 /*
408 * Initialize FIP.
409 */
Robert Love619fe4b2012-05-22 19:06:10 -0700410 fcoe_ctlr_init(ctlr, fip_mode);
411 ctlr->send = fcoe_fip_send;
412 ctlr->update_mac = fcoe_update_src_mac;
413 ctlr->get_src_addr = fcoe_get_src_mac;
Chris Leech54b649f2009-08-25 14:00:07 -0700414
john fastabend59d92512009-11-03 11:48:44 -0800415 err = fcoe_interface_setup(fcoe, netdev);
416 if (err) {
Robert Love619fe4b2012-05-22 19:06:10 -0700417 fcoe_ctlr_destroy(ctlr);
Robert Love8d55e502012-05-22 19:06:26 -0700418 fcoe_ctlr_device_delete(ctlr_dev);
john fastabend59d92512009-11-03 11:48:44 -0800419 dev_put(netdev);
Robert Love7287fb92011-01-28 16:03:47 -0800420 fcoe = ERR_PTR(err);
Robert Love6f687942012-02-10 17:18:36 -0800421 goto out_putmod;
john fastabend59d92512009-11-03 11:48:44 -0800422 }
Chris Leech030f4e02009-08-25 14:00:02 -0700423
Robert Love7287fb92011-01-28 16:03:47 -0800424 goto out;
425
Robert Love6f687942012-02-10 17:18:36 -0800426out_putmod:
Robert Love7287fb92011-01-28 16:03:47 -0800427 module_put(THIS_MODULE);
428out:
Chris Leech030f4e02009-08-25 14:00:02 -0700429 return fcoe;
430}
431
432/**
Vasu Dev433eba02012-04-20 12:16:27 -0700433 * fcoe_interface_remove() - remove FCoE interface from netdev
Vasu Devf04ca1b2011-04-01 16:06:45 -0700434 * @fcoe: The FCoE interface to be cleaned up
435 *
436 * Caller must be holding the RTNL mutex
437 */
Vasu Dev433eba02012-04-20 12:16:27 -0700438static void fcoe_interface_remove(struct fcoe_interface *fcoe)
Vasu Devf04ca1b2011-04-01 16:06:45 -0700439{
440 struct net_device *netdev = fcoe->netdev;
Robert Love619fe4b2012-05-22 19:06:10 -0700441 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
Vasu Devf04ca1b2011-04-01 16:06:45 -0700442 u8 flogi_maddr[ETH_ALEN];
443 const struct net_device_ops *ops;
Vasu Devf04ca1b2011-04-01 16:06:45 -0700444
445 /*
446 * Don't listen for Ethernet packets anymore.
447 * synchronize_net() ensures that the packet handlers are not running
448 * on another CPU. dev_remove_pack() would do that, this calls the
449 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
450 */
451 __dev_remove_pack(&fcoe->fcoe_packet_type);
452 __dev_remove_pack(&fcoe->fip_packet_type);
453 synchronize_net();
454
455 /* Delete secondary MAC addresses */
456 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
457 dev_uc_del(netdev, flogi_maddr);
458 if (fip->spma)
459 dev_uc_del(netdev, fip->ctl_src_addr);
460 if (fip->mode == FIP_MODE_VN2VN) {
461 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
462 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
463 } else
464 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
465
Vasu Devf04ca1b2011-04-01 16:06:45 -0700466 /* Tell the LLD we are done w/ FCoE */
467 ops = netdev->netdev_ops;
468 if (ops->ndo_fcoe_disable) {
469 if (ops->ndo_fcoe_disable(netdev))
470 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
471 " specific feature for LLD.\n");
472 }
Vasu Dev433eba02012-04-20 12:16:27 -0700473 fcoe->removed = 1;
474}
Neerav Parikhb2085a42011-06-20 16:59:51 -0700475
Vasu Dev433eba02012-04-20 12:16:27 -0700476
477/**
478 * fcoe_interface_cleanup() - Clean up a FCoE interface
479 * @fcoe: The FCoE interface to be cleaned up
480 */
481static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
482{
483 struct net_device *netdev = fcoe->netdev;
Robert Love619fe4b2012-05-22 19:06:10 -0700484 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
Vasu Dev433eba02012-04-20 12:16:27 -0700485
486 rtnl_lock();
487 if (!fcoe->removed)
488 fcoe_interface_remove(fcoe);
Robert Love848e7d52011-08-25 12:40:47 -0700489 rtnl_unlock();
490
Neerav Parikhb2085a42011-06-20 16:59:51 -0700491 /* Release the self-reference taken during fcoe_interface_create() */
Robert Love1a8ef412012-02-10 17:18:46 -0800492 /* tear-down the FCoE controller */
493 fcoe_ctlr_destroy(fip);
Robert Love619fe4b2012-05-22 19:06:10 -0700494 scsi_host_put(fip->lp->host);
Robert Love1a8ef412012-02-10 17:18:46 -0800495 dev_put(netdev);
496 module_put(THIS_MODULE);
Vasu Devf04ca1b2011-04-01 16:06:45 -0700497}
498
499/**
Robert Love1875f272009-11-03 11:47:50 -0800500 * 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 the skb was received on.
505 * (in case dev is a bond)
Vasu Devab6b85c2009-05-17 12:33:08 +0000506 *
507 * Returns: 0 for success
508 */
Robert Love1875f272009-11-03 11:47:50 -0800509static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
Vasu Devab6b85c2009-05-17 12:33:08 +0000510 struct packet_type *ptype,
511 struct net_device *orig_dev)
512{
Chris Leech259ad852009-08-25 13:59:41 -0700513 struct fcoe_interface *fcoe;
Robert Love619fe4b2012-05-22 19:06:10 -0700514 struct fcoe_ctlr *ctlr;
Vasu Devab6b85c2009-05-17 12:33:08 +0000515
Chris Leech259ad852009-08-25 13:59:41 -0700516 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
Robert Love619fe4b2012-05-22 19:06:10 -0700517 ctlr = fcoe_to_ctlr(fcoe);
518 fcoe_ctlr_recv(ctlr, skb);
Vasu Devab6b85c2009-05-17 12:33:08 +0000519 return 0;
520}
521
522/**
Vasu Dev980f5152011-07-27 15:11:05 -0700523 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
524 * @port: The FCoE port
525 * @skb: The FIP/FCoE packet to be sent
526 */
527static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
528{
529 if (port->fcoe_pending_queue.qlen)
530 fcoe_check_wait_queue(port->lport, skb);
531 else if (fcoe_start_io(skb))
532 fcoe_check_wait_queue(port->lport, skb);
533}
534
535/**
Robert Love1875f272009-11-03 11:47:50 -0800536 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
537 * @fip: The FCoE controller
538 * @skb: The FIP packet to be sent
Vasu Devab6b85c2009-05-17 12:33:08 +0000539 */
540static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
541{
Chris Leech3fe9a0b2009-08-25 13:59:46 -0700542 skb->dev = fcoe_from_ctlr(fip)->netdev;
Vasu Dev980f5152011-07-27 15:11:05 -0700543 fcoe_port_send(lport_priv(fip->lp), skb);
Vasu Devab6b85c2009-05-17 12:33:08 +0000544}
545
546/**
Robert Love1875f272009-11-03 11:47:50 -0800547 * fcoe_update_src_mac() - Update the Ethernet MAC filters
548 * @lport: The local port to update the source MAC on
549 * @addr: Unicast MAC address to add
Vasu Devab6b85c2009-05-17 12:33:08 +0000550 *
551 * Remove any previously-set unicast MAC filter.
552 * Add secondary FCoE MAC address filter for our OUI.
553 */
Chris Leech11b56182009-11-03 11:46:29 -0800554static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
Vasu Devab6b85c2009-05-17 12:33:08 +0000555{
Chris Leech11b56182009-11-03 11:46:29 -0800556 struct fcoe_port *port = lport_priv(lport);
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -0800557 struct fcoe_interface *fcoe = port->priv;
Vasu Devab6b85c2009-05-17 12:33:08 +0000558
Chris Leech11b56182009-11-03 11:46:29 -0800559 if (!is_zero_ether_addr(port->data_src_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000560 dev_uc_del(fcoe->netdev, port->data_src_addr);
Chris Leech11b56182009-11-03 11:46:29 -0800561 if (!is_zero_ether_addr(addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000562 dev_uc_add(fcoe->netdev, addr);
Chris Leech11b56182009-11-03 11:46:29 -0800563 memcpy(port->data_src_addr, addr, ETH_ALEN);
Vasu Devab6b85c2009-05-17 12:33:08 +0000564}
565
566/**
Chris Leech11b56182009-11-03 11:46:29 -0800567 * fcoe_get_src_mac() - return the Ethernet source address for an lport
568 * @lport: libfc lport
569 */
570static u8 *fcoe_get_src_mac(struct fc_lport *lport)
571{
572 struct fcoe_port *port = lport_priv(lport);
573
574 return port->data_src_addr;
575}
576
577/**
Robert Love1875f272009-11-03 11:47:50 -0800578 * fcoe_lport_config() - Set up a local port
579 * @lport: The local port to be setup
Vasu Dev7f349142009-03-27 09:06:31 -0700580 *
581 * Returns: 0 for success
582 */
Robert Love1875f272009-11-03 11:47:50 -0800583static int fcoe_lport_config(struct fc_lport *lport)
Vasu Dev7f349142009-03-27 09:06:31 -0700584{
Robert Love1875f272009-11-03 11:47:50 -0800585 lport->link_up = 0;
586 lport->qfull = 0;
587 lport->max_retry_count = 3;
588 lport->max_rport_retry_count = 3;
589 lport->e_d_tov = 2 * 1000; /* FC-FS default */
590 lport->r_a_tov = 2 * 2 * 1000;
591 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
592 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
593 lport->does_npiv = 1;
Vasu Dev7f349142009-03-27 09:06:31 -0700594
Robert Love1875f272009-11-03 11:47:50 -0800595 fc_lport_init_stats(lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700596
597 /* lport fc_lport related configuration */
Robert Love1875f272009-11-03 11:47:50 -0800598 fc_lport_config(lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700599
600 /* offload related configuration */
Robert Love1875f272009-11-03 11:47:50 -0800601 lport->crc_offload = 0;
602 lport->seq_offload = 0;
603 lport->lro_enabled = 0;
604 lport->lro_xid = 0;
605 lport->lso_max = 0;
Vasu Dev7f349142009-03-27 09:06:31 -0700606
607 return 0;
608}
609
610/**
Yi Zou54a5b212010-07-20 15:21:17 -0700611 * fcoe_netdev_features_change - Updates the lport's offload flags based
612 * on the LLD netdev's FCoE feature flags
613 */
614static void fcoe_netdev_features_change(struct fc_lport *lport,
615 struct net_device *netdev)
616{
617 mutex_lock(&lport->lp_mutex);
618
619 if (netdev->features & NETIF_F_SG)
620 lport->sg_supp = 1;
621 else
622 lport->sg_supp = 0;
623
624 if (netdev->features & NETIF_F_FCOE_CRC) {
625 lport->crc_offload = 1;
626 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
627 } else {
628 lport->crc_offload = 0;
629 }
630
631 if (netdev->features & NETIF_F_FSO) {
632 lport->seq_offload = 1;
633 lport->lso_max = netdev->gso_max_size;
634 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
635 lport->lso_max);
636 } else {
637 lport->seq_offload = 0;
638 lport->lso_max = 0;
639 }
640
641 if (netdev->fcoe_ddp_xid) {
642 lport->lro_enabled = 1;
643 lport->lro_xid = netdev->fcoe_ddp_xid;
644 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
645 lport->lro_xid);
646 } else {
647 lport->lro_enabled = 0;
648 lport->lro_xid = 0;
649 }
650
651 mutex_unlock(&lport->lp_mutex);
652}
653
654/**
Robert Love1875f272009-11-03 11:47:50 -0800655 * fcoe_netdev_config() - Set up net devive for SW FCoE
656 * @lport: The local port that is associated with the net device
657 * @netdev: The associated net device
Vasu Dev7f349142009-03-27 09:06:31 -0700658 *
Robert Love1875f272009-11-03 11:47:50 -0800659 * Must be called after fcoe_lport_config() as it will use local port mutex
Vasu Dev7f349142009-03-27 09:06:31 -0700660 *
Robert Love1875f272009-11-03 11:47:50 -0800661 * Returns: 0 for success
Vasu Dev7f349142009-03-27 09:06:31 -0700662 */
Robert Love1875f272009-11-03 11:47:50 -0800663static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
Vasu Dev7f349142009-03-27 09:06:31 -0700664{
665 u32 mfs;
666 u64 wwnn, wwpn;
Chris Leech25024982009-08-25 13:59:35 -0700667 struct fcoe_interface *fcoe;
Robert Love619fe4b2012-05-22 19:06:10 -0700668 struct fcoe_ctlr *ctlr;
Chris Leech014f5c32009-08-25 13:59:30 -0700669 struct fcoe_port *port;
Vasu Dev7f349142009-03-27 09:06:31 -0700670
671 /* Setup lport private data to point to fcoe softc */
Robert Love1875f272009-11-03 11:47:50 -0800672 port = lport_priv(lport);
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -0800673 fcoe = port->priv;
Robert Love619fe4b2012-05-22 19:06:10 -0700674 ctlr = fcoe_to_ctlr(fcoe);
Vasu Dev7f349142009-03-27 09:06:31 -0700675
Hannes Reinecke9a6cf882016-07-19 13:49:40 +0200676 /* Figure out the VLAN ID, if any */
677 if (netdev->priv_flags & IFF_802_1Q_VLAN)
678 lport->vlan = vlan_dev_vlan_id(netdev);
679 else
680 lport->vlan = 0;
681
Vasu Dev7f349142009-03-27 09:06:31 -0700682 /*
683 * Determine max frame size based on underlying device and optional
684 * user-configured limit. If the MFS is too low, fcoe_link_ok()
685 * will return 0, so do this first.
686 */
Yi Zou7221d7e2009-10-21 16:27:52 -0700687 mfs = netdev->mtu;
688 if (netdev->features & NETIF_F_FCOE_MTU) {
689 mfs = FCOE_MTU;
690 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
691 }
692 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
Robert Love1875f272009-11-03 11:47:50 -0800693 if (fc_set_mfs(lport, mfs))
Vasu Dev7f349142009-03-27 09:06:31 -0700694 return -EINVAL;
695
Vasu Dev7f349142009-03-27 09:06:31 -0700696 /* offload features support */
Yi Zou54a5b212010-07-20 15:21:17 -0700697 fcoe_netdev_features_change(lport, netdev);
Vasu Dev7f349142009-03-27 09:06:31 -0700698
Chris Leech014f5c32009-08-25 13:59:30 -0700699 skb_queue_head_init(&port->fcoe_pending_queue);
700 port->fcoe_pending_queue_active = 0;
Robert Love1875f272009-11-03 11:47:50 -0800701 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700702
Robert Love5e4f8fe2010-05-07 15:18:35 -0700703 fcoe_link_speed_update(lport);
704
Robert Love1875f272009-11-03 11:47:50 -0800705 if (!lport->vport) {
Yi Zoudcece412009-11-20 15:22:21 -0800706 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
Robert Love619fe4b2012-05-22 19:06:10 -0700707 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
Robert Love1875f272009-11-03 11:47:50 -0800708 fc_set_wwnn(lport, wwnn);
Yi Zoudcece412009-11-20 15:22:21 -0800709 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
Robert Love619fe4b2012-05-22 19:06:10 -0700710 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
Vasu Devcf4aebca2010-07-20 15:21:22 -0700711 2, 0);
Robert Love1875f272009-11-03 11:47:50 -0800712 fc_set_wwpn(lport, wwpn);
Chris Leech9a057532009-11-03 11:46:40 -0800713 }
Vasu Dev7f349142009-03-27 09:06:31 -0700714
Vasu Dev7f349142009-03-27 09:06:31 -0700715 return 0;
716}
717
718/**
Robert Love1875f272009-11-03 11:47:50 -0800719 * fcoe_shost_config() - Set up the SCSI host associated with a local port
720 * @lport: The local port
Robert Love1875f272009-11-03 11:47:50 -0800721 * @dev: The device associated with the SCSI host
Vasu Dev7f349142009-03-27 09:06:31 -0700722 *
723 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
724 *
Robert Love1875f272009-11-03 11:47:50 -0800725 * Returns: 0 for success
Vasu Dev7f349142009-03-27 09:06:31 -0700726 */
Vasu Dev8ba00a42010-04-09 14:22:54 -0700727static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
Vasu Dev7f349142009-03-27 09:06:31 -0700728{
729 int rc = 0;
730
731 /* lport scsi host config */
Robert Love1875f272009-11-03 11:47:50 -0800732 lport->host->max_lun = FCOE_MAX_LUN;
733 lport->host->max_id = FCOE_MAX_FCP_TARGET;
734 lport->host->max_channel = 0;
Vasu Devda87bfa2010-04-09 14:22:59 -0700735 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
736
Robert Love1875f272009-11-03 11:47:50 -0800737 if (lport->vport)
Yi Zou8ca86f82011-01-28 16:05:11 -0800738 lport->host->transportt = fcoe_vport_scsi_transport;
Chris Leeche9084bb2009-11-03 11:46:34 -0800739 else
Yi Zou8ca86f82011-01-28 16:05:11 -0800740 lport->host->transportt = fcoe_nport_scsi_transport;
Vasu Dev7f349142009-03-27 09:06:31 -0700741
742 /* add the new host to the SCSI-ml */
Robert Love1875f272009-11-03 11:47:50 -0800743 rc = scsi_add_host(lport->host, dev);
Vasu Dev7f349142009-03-27 09:06:31 -0700744 if (rc) {
Robert Love1875f272009-11-03 11:47:50 -0800745 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
Robert Loved5488eb2009-06-10 15:30:59 -0700746 "error on scsi_add_host\n");
Vasu Dev7f349142009-03-27 09:06:31 -0700747 return rc;
748 }
Chris Leech9a057532009-11-03 11:46:40 -0800749
Robert Love1875f272009-11-03 11:47:50 -0800750 if (!lport->vport)
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700751 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
Chris Leech9a057532009-11-03 11:46:40 -0800752
Robert Love1875f272009-11-03 11:47:50 -0800753 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
Chris Leech5baa17c2009-11-03 11:46:56 -0800754 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
Robert Love1875f272009-11-03 11:47:50 -0800755 fcoe_netdev(lport)->name);
Vasu Dev7f349142009-03-27 09:06:31 -0700756
757 return 0;
758}
759
Neerav Parikh6fef3902012-01-22 17:30:10 -0800760
761/**
762 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
763 * @lport: The local port that is associated with the net device
764 * @netdev: The associated net device
765 *
766 * Must be called after fcoe_shost_config() as it will use local port mutex
767 *
768 */
769static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
770{
771 struct fcoe_interface *fcoe;
772 struct fcoe_port *port;
773 struct net_device *realdev;
774 int rc;
Neerav Parikh6fef3902012-01-22 17:30:10 -0800775
776 port = lport_priv(lport);
777 fcoe = port->priv;
778 realdev = fcoe->realdev;
779
Neerav Parikh6fef3902012-01-22 17:30:10 -0800780 /* No FDMI state m/c for NPIV ports */
781 if (lport->vport)
782 return;
783
784 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000785 struct netdev_fcoe_hbainfo *fdmi;
786 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
787 if (!fdmi)
788 return;
789
Neerav Parikh6fef3902012-01-22 17:30:10 -0800790 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000791 fdmi);
Neerav Parikh6fef3902012-01-22 17:30:10 -0800792 if (rc) {
793 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
794 "information from netdev.\n");
795 return;
796 }
797
798 snprintf(fc_host_serial_number(lport->host),
799 FC_SERIAL_NUMBER_SIZE,
800 "%s",
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000801 fdmi->serial_number);
Neerav Parikh6fef3902012-01-22 17:30:10 -0800802 snprintf(fc_host_manufacturer(lport->host),
803 FC_SERIAL_NUMBER_SIZE,
804 "%s",
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000805 fdmi->manufacturer);
Neerav Parikh6fef3902012-01-22 17:30:10 -0800806 snprintf(fc_host_model(lport->host),
807 FC_SYMBOLIC_NAME_SIZE,
808 "%s",
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000809 fdmi->model);
Neerav Parikh6fef3902012-01-22 17:30:10 -0800810 snprintf(fc_host_model_description(lport->host),
811 FC_SYMBOLIC_NAME_SIZE,
812 "%s",
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000813 fdmi->model_description);
Neerav Parikh6fef3902012-01-22 17:30:10 -0800814 snprintf(fc_host_hardware_version(lport->host),
815 FC_VERSION_STRING_SIZE,
816 "%s",
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000817 fdmi->hardware_version);
Neerav Parikh6fef3902012-01-22 17:30:10 -0800818 snprintf(fc_host_driver_version(lport->host),
819 FC_VERSION_STRING_SIZE,
820 "%s",
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000821 fdmi->driver_version);
Neerav Parikh6fef3902012-01-22 17:30:10 -0800822 snprintf(fc_host_optionrom_version(lport->host),
823 FC_VERSION_STRING_SIZE,
824 "%s",
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000825 fdmi->optionrom_version);
Neerav Parikh6fef3902012-01-22 17:30:10 -0800826 snprintf(fc_host_firmware_version(lport->host),
827 FC_VERSION_STRING_SIZE,
828 "%s",
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000829 fdmi->firmware_version);
Neerav Parikh6fef3902012-01-22 17:30:10 -0800830
831 /* Enable FDMI lport states */
832 lport->fdmi_enabled = 1;
Neerav Parikhf07d46b2013-05-18 05:12:28 +0000833 kfree(fdmi);
Neerav Parikh6fef3902012-01-22 17:30:10 -0800834 } else {
835 lport->fdmi_enabled = 0;
836 printk(KERN_INFO "fcoe: No FDMI support.\n");
837 }
838}
839
Robert Love1875f272009-11-03 11:47:50 -0800840/**
841 * fcoe_oem_match() - The match routine for the offloaded exchange manager
842 * @fp: The I/O frame
Vasu Devd7179682009-07-29 17:05:21 -0700843 *
Robert Love1875f272009-11-03 11:47:50 -0800844 * This routine will be associated with an exchange manager (EM). When
845 * the libfc exchange handling code is looking for an EM to use it will
846 * call this routine and pass it the frame that it wishes to send. This
847 * routine will return True if the associated EM is to be used and False
848 * if the echange code should continue looking for an EM.
849 *
850 * The offload EM that this routine is associated with will handle any
851 * packets that are for SCSI read requests.
852 *
Kiran Patil1ff99182011-06-20 16:59:15 -0700853 * This has been enhanced to work when FCoE stack is operating in target
854 * mode.
855 *
Robert Love1875f272009-11-03 11:47:50 -0800856 * Returns: True for read types I/O, otherwise returns false.
Vasu Devd7179682009-07-29 17:05:21 -0700857 */
Bart Van Assche7c9c6842012-01-13 17:26:25 -0800858static bool fcoe_oem_match(struct fc_frame *fp)
Vasu Devd7179682009-07-29 17:05:21 -0700859{
Kiran Patil1ff99182011-06-20 16:59:15 -0700860 struct fc_frame_header *fh = fc_frame_header_get(fp);
861 struct fcp_cmnd *fcp;
862
863 if (fc_fcp_is_read(fr_fsp(fp)) &&
864 (fr_fsp(fp)->data_len > fcoe_ddp_min))
865 return true;
Yi Zoua762dce2012-01-13 17:26:15 -0800866 else if ((fr_fsp(fp) == NULL) &&
867 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
868 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
Kiran Patil1ff99182011-06-20 16:59:15 -0700869 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
Yi Zoua762dce2012-01-13 17:26:15 -0800870 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
871 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
Kiran Patil1ff99182011-06-20 16:59:15 -0700872 return true;
873 }
874 return false;
Vasu Devd7179682009-07-29 17:05:21 -0700875}
876
Vasu Dev7f349142009-03-27 09:06:31 -0700877/**
Robert Love1875f272009-11-03 11:47:50 -0800878 * fcoe_em_config() - Allocate and configure an exchange manager
879 * @lport: The local port that the new EM will be associated with
Vasu Dev7f349142009-03-27 09:06:31 -0700880 *
Robert Love1875f272009-11-03 11:47:50 -0800881 * Returns: 0 on success
Vasu Dev7f349142009-03-27 09:06:31 -0700882 */
Robert Love1875f272009-11-03 11:47:50 -0800883static inline int fcoe_em_config(struct fc_lport *lport)
Vasu Dev7f349142009-03-27 09:06:31 -0700884{
Robert Love1875f272009-11-03 11:47:50 -0800885 struct fcoe_port *port = lport_priv(lport);
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -0800886 struct fcoe_interface *fcoe = port->priv;
Chris Leech25024982009-08-25 13:59:35 -0700887 struct fcoe_interface *oldfcoe = NULL;
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700888 struct net_device *old_real_dev, *cur_real_dev;
Vasu Devd7179682009-07-29 17:05:21 -0700889 u16 min_xid = FCOE_MIN_XID;
890 u16 max_xid = FCOE_MAX_XID;
891
892 /*
893 * Check if need to allocate an em instance for
894 * offload exchange ids to be shared across all VN_PORTs/lport.
895 */
Robert Love1875f272009-11-03 11:47:50 -0800896 if (!lport->lro_enabled || !lport->lro_xid ||
897 (lport->lro_xid >= max_xid)) {
898 lport->lro_xid = 0;
Vasu Devd7179682009-07-29 17:05:21 -0700899 goto skip_oem;
900 }
901
902 /*
903 * Reuse existing offload em instance in case
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700904 * it is already allocated on real eth device
Vasu Devd7179682009-07-29 17:05:21 -0700905 */
Chris Leech25024982009-08-25 13:59:35 -0700906 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
907 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700908 else
Chris Leech25024982009-08-25 13:59:35 -0700909 cur_real_dev = fcoe->netdev;
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700910
Chris Leech25024982009-08-25 13:59:35 -0700911 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
Chris Leech25024982009-08-25 13:59:35 -0700912 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
913 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700914 else
Chris Leech25024982009-08-25 13:59:35 -0700915 old_real_dev = oldfcoe->netdev;
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700916
917 if (cur_real_dev == old_real_dev) {
Chris Leech991cbb62009-08-25 13:59:51 -0700918 fcoe->oem = oldfcoe->oem;
Vasu Devd7179682009-07-29 17:05:21 -0700919 break;
920 }
921 }
922
Chris Leech991cbb62009-08-25 13:59:51 -0700923 if (fcoe->oem) {
Robert Love1875f272009-11-03 11:47:50 -0800924 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
Vasu Devd7179682009-07-29 17:05:21 -0700925 printk(KERN_ERR "fcoe_em_config: failed to add "
926 "offload em:%p on interface:%s\n",
Chris Leech991cbb62009-08-25 13:59:51 -0700927 fcoe->oem, fcoe->netdev->name);
Vasu Devd7179682009-07-29 17:05:21 -0700928 return -ENOMEM;
929 }
930 } else {
Robert Love1875f272009-11-03 11:47:50 -0800931 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
932 FCOE_MIN_XID, lport->lro_xid,
933 fcoe_oem_match);
Chris Leech991cbb62009-08-25 13:59:51 -0700934 if (!fcoe->oem) {
Vasu Devd7179682009-07-29 17:05:21 -0700935 printk(KERN_ERR "fcoe_em_config: failed to allocate "
936 "em for offload exches on interface:%s\n",
Chris Leech25024982009-08-25 13:59:35 -0700937 fcoe->netdev->name);
Vasu Devd7179682009-07-29 17:05:21 -0700938 return -ENOMEM;
939 }
940 }
941
942 /*
943 * Exclude offload EM xid range from next EM xid range.
944 */
Robert Love1875f272009-11-03 11:47:50 -0800945 min_xid += lport->lro_xid + 1;
Vasu Devd7179682009-07-29 17:05:21 -0700946
947skip_oem:
Robert Love1875f272009-11-03 11:47:50 -0800948 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
Vasu Devd7179682009-07-29 17:05:21 -0700949 printk(KERN_ERR "fcoe_em_config: failed to "
Chris Leech25024982009-08-25 13:59:35 -0700950 "allocate em on interface %s\n", fcoe->netdev->name);
Vasu Dev7f349142009-03-27 09:06:31 -0700951 return -ENOMEM;
Vasu Devd7179682009-07-29 17:05:21 -0700952 }
Vasu Dev7f349142009-03-27 09:06:31 -0700953
954 return 0;
955}
956
957/**
Robert Love1875f272009-11-03 11:47:50 -0800958 * fcoe_if_destroy() - Tear down a SW FCoE instance
959 * @lport: The local port to be destroyed
Vasu Dev34ce27b2010-05-07 15:18:46 -0700960 *
Vasu Dev7f349142009-03-27 09:06:31 -0700961 */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700962static void fcoe_if_destroy(struct fc_lport *lport)
Vasu Dev7f349142009-03-27 09:06:31 -0700963{
Neerav Parikhb2085a42011-06-20 16:59:51 -0700964 struct fcoe_port *port = lport_priv(lport);
965 struct fcoe_interface *fcoe = port->priv;
966 struct net_device *netdev = fcoe->netdev;
967
968 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
969
970 /* Logout of the fabric */
971 fc_fabric_logoff(lport);
972
973 /* Cleanup the fc_lport */
974 fc_lport_destroy(lport);
975
976 /* Stop the transmit retry timer */
977 del_timer_sync(&port->timer);
978
979 /* Free existing transmit skbs */
980 fcoe_clean_pending_queue(lport);
981
982 rtnl_lock();
983 if (!is_zero_ether_addr(port->data_src_addr))
984 dev_uc_del(netdev, port->data_src_addr);
Vasu Dev433eba02012-04-20 12:16:27 -0700985 if (lport->vport)
986 synchronize_net();
987 else
988 fcoe_interface_remove(fcoe);
Neerav Parikhb2085a42011-06-20 16:59:51 -0700989 rtnl_unlock();
990
Chris Leech54b649f2009-08-25 14:00:07 -0700991 /* Free queued packets for the per-CPU receive threads */
992 fcoe_percpu_clean(lport);
993
Vasu Dev7f349142009-03-27 09:06:31 -0700994 /* Detach from the scsi-ml */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700995 fc_remove_host(lport->host);
996 scsi_remove_host(lport->host);
Vasu Dev7f349142009-03-27 09:06:31 -0700997
Yi Zou80e736f2010-11-30 16:18:07 -0800998 /* Destroy lport scsi_priv */
999 fc_fcp_destroy(lport);
1000
Vasu Dev7f349142009-03-27 09:06:31 -07001001 /* There are no more rports or I/O, free the EM */
Chris Leechaf7f85d2009-08-25 13:59:24 -07001002 fc_exch_mgr_free(lport);
Vasu Dev7f349142009-03-27 09:06:31 -07001003
Vasu Dev7f349142009-03-27 09:06:31 -07001004 /* Free memory used by statistical counters */
Chris Leechaf7f85d2009-08-25 13:59:24 -07001005 fc_lport_free_stats(lport);
Vasu Dev7f349142009-03-27 09:06:31 -07001006
Vasu Dev3cab4462012-04-20 12:16:38 -07001007 /*
1008 * Release the Scsi_Host for vport but hold on to
1009 * master lport until it fcoe interface fully cleaned-up.
1010 */
1011 if (lport->vport)
1012 scsi_host_put(lport->host);
Vasu Dev7f349142009-03-27 09:06:31 -07001013}
1014
Robert Love1875f272009-11-03 11:47:50 -08001015/**
1016 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1017 * @lport: The local port to setup DDP for
1018 * @xid: The exchange ID for this DDP transfer
1019 * @sgl: The scatterlist describing this transfer
1020 * @sgc: The number of sg items
Vasu Dev7f349142009-03-27 09:06:31 -07001021 *
Robert Love1875f272009-11-03 11:47:50 -08001022 * Returns: 0 if the DDP context was not configured
Vasu Dev7f349142009-03-27 09:06:31 -07001023 */
Robert Love1875f272009-11-03 11:47:50 -08001024static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1025 struct scatterlist *sgl, unsigned int sgc)
Vasu Dev7f349142009-03-27 09:06:31 -07001026{
Robert Love1875f272009-11-03 11:47:50 -08001027 struct net_device *netdev = fcoe_netdev(lport);
Vasu Dev7f349142009-03-27 09:06:31 -07001028
Robert Love1875f272009-11-03 11:47:50 -08001029 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1030 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1031 xid, sgl,
1032 sgc);
Vasu Dev7f349142009-03-27 09:06:31 -07001033
1034 return 0;
1035}
1036
Vasu Dev7f349142009-03-27 09:06:31 -07001037/**
Yi Zou71f89492011-06-20 16:59:10 -07001038 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1039 * @lport: The local port to setup DDP for
1040 * @xid: The exchange ID for this DDP transfer
1041 * @sgl: The scatterlist describing this transfer
1042 * @sgc: The number of sg items
1043 *
1044 * Returns: 0 if the DDP context was not configured
1045 */
1046static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1047 struct scatterlist *sgl, unsigned int sgc)
1048{
1049 struct net_device *netdev = fcoe_netdev(lport);
1050
1051 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1052 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1053 sgl, sgc);
1054
1055 return 0;
1056}
1057
1058
1059/**
Robert Love1875f272009-11-03 11:47:50 -08001060 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1061 * @lport: The local port to complete DDP on
1062 * @xid: The exchange ID for this DDP transfer
Vasu Dev7f349142009-03-27 09:06:31 -07001063 *
Robert Love1875f272009-11-03 11:47:50 -08001064 * Returns: the length of data that have been completed by DDP
1065 */
1066static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1067{
1068 struct net_device *netdev = fcoe_netdev(lport);
1069
1070 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1071 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1072 return 0;
1073}
1074
1075/**
1076 * fcoe_if_create() - Create a FCoE instance on an interface
1077 * @fcoe: The FCoE interface to create a local port on
1078 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1079 * @npiv: Indicates if the port is a vport or not
Vasu Dev7f349142009-03-27 09:06:31 -07001080 *
Robert Love1875f272009-11-03 11:47:50 -08001081 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1082 *
1083 * Returns: The allocated fc_lport or an error pointer
Vasu Dev7f349142009-03-27 09:06:31 -07001084 */
Chris Leech030f4e02009-08-25 14:00:02 -07001085static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
Chris Leech9a057532009-11-03 11:46:40 -08001086 struct device *parent, int npiv)
Vasu Dev7f349142009-03-27 09:06:31 -07001087{
Robert Love619fe4b2012-05-22 19:06:10 -07001088 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
Robert Love1875f272009-11-03 11:47:50 -08001089 struct net_device *netdev = fcoe->netdev;
Vasu Dev72fa3962011-02-25 15:03:01 -08001090 struct fc_lport *lport, *n_port;
Chris Leech014f5c32009-08-25 13:59:30 -07001091 struct fcoe_port *port;
Vasu Dev72fa3962011-02-25 15:03:01 -08001092 struct Scsi_Host *shost;
Robert Love1875f272009-11-03 11:47:50 -08001093 int rc;
Chris Leech9a057532009-11-03 11:46:40 -08001094 /*
1095 * parent is only a vport if npiv is 1,
1096 * but we'll only use vport in that case so go ahead and set it
1097 */
1098 struct fc_vport *vport = dev_to_vport(parent);
Vasu Dev7f349142009-03-27 09:06:31 -07001099
Robert Loved5488eb2009-06-10 15:30:59 -07001100 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
Vasu Dev7f349142009-03-27 09:06:31 -07001101
Vasu Dev72fa3962011-02-25 15:03:01 -08001102 if (!npiv)
1103 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1104 else
1105 lport = libfc_vport_create(vport, sizeof(*port));
1106
Chris Leech86221962009-11-03 11:46:08 -08001107 if (!lport) {
Chris Leech014f5c32009-08-25 13:59:30 -07001108 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1109 rc = -ENOMEM;
Chris Leech030f4e02009-08-25 14:00:02 -07001110 goto out;
Chris Leech014f5c32009-08-25 13:59:30 -07001111 }
Chris Leech014f5c32009-08-25 13:59:30 -07001112 port = lport_priv(lport);
Chris Leech2e70e242009-08-25 14:00:23 -07001113 port->lport = lport;
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08001114 port->priv = fcoe;
Yi Zou66524ec2012-12-06 06:23:43 +00001115 port->get_netdev = fcoe_netdev;
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08001116 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1117 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
Chris Leech2e70e242009-08-25 14:00:23 -07001118 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
Vasu Dev7f349142009-03-27 09:06:31 -07001119
Neil Hormanf9184df2013-01-15 14:34:40 -05001120 /*
1121 * Need to add the lport to the hostlist
1122 * so we catch NETDEV_CHANGE events.
1123 */
1124 fcoe_hostlist_add(lport);
1125
Robert Love1875f272009-11-03 11:47:50 -08001126 /* configure a fc_lport including the exchange manager */
Chris Leechaf7f85d2009-08-25 13:59:24 -07001127 rc = fcoe_lport_config(lport);
Vasu Dev7f349142009-03-27 09:06:31 -07001128 if (rc) {
Robert Loved5488eb2009-06-10 15:30:59 -07001129 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1130 "interface\n");
Vasu Dev7f349142009-03-27 09:06:31 -07001131 goto out_host_put;
1132 }
1133
Chris Leech9a057532009-11-03 11:46:40 -08001134 if (npiv) {
Chris Leech9f8f3aa2010-04-09 14:23:16 -07001135 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1136 "%16.16llx %16.16llx\n",
Robert Love1875f272009-11-03 11:47:50 -08001137 vport->node_name, vport->port_name);
Chris Leech9a057532009-11-03 11:46:40 -08001138 fc_set_wwnn(lport, vport->node_name);
1139 fc_set_wwpn(lport, vport->port_name);
1140 }
1141
Vasu Devab6b85c2009-05-17 12:33:08 +00001142 /* configure lport network properties */
Chris Leechaf7f85d2009-08-25 13:59:24 -07001143 rc = fcoe_netdev_config(lport, netdev);
Vasu Devab6b85c2009-05-17 12:33:08 +00001144 if (rc) {
Robert Loved5488eb2009-06-10 15:30:59 -07001145 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1146 "interface\n");
Chris Leech54b649f2009-08-25 14:00:07 -07001147 goto out_lp_destroy;
Vasu Devab6b85c2009-05-17 12:33:08 +00001148 }
Joe Eykholt97c83892009-03-17 11:42:40 -07001149
Vasu Dev7f349142009-03-27 09:06:31 -07001150 /* configure lport scsi host properties */
Vasu Dev8ba00a42010-04-09 14:22:54 -07001151 rc = fcoe_shost_config(lport, parent);
Vasu Dev7f349142009-03-27 09:06:31 -07001152 if (rc) {
Robert Loved5488eb2009-06-10 15:30:59 -07001153 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1154 "interface\n");
Chris Leech54b649f2009-08-25 14:00:07 -07001155 goto out_lp_destroy;
Vasu Dev7f349142009-03-27 09:06:31 -07001156 }
1157
Vasu Dev7f349142009-03-27 09:06:31 -07001158 /* Initialize the library */
Robert Love619fe4b2012-05-22 19:06:10 -07001159 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
Vasu Dev7f349142009-03-27 09:06:31 -07001160 if (rc) {
Robert Loved5488eb2009-06-10 15:30:59 -07001161 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1162 "interface\n");
Vasu Dev7f349142009-03-27 09:06:31 -07001163 goto out_lp_destroy;
1164 }
1165
Neerav Parikh6fef3902012-01-22 17:30:10 -08001166 /* Initialized FDMI information */
1167 fcoe_fdmi_info(lport, netdev);
1168
Vasu Dev72fa3962011-02-25 15:03:01 -08001169 /*
1170 * fcoe_em_alloc() and fcoe_hostlist_add() both
1171 * need to be atomic with respect to other changes to the
1172 * hostlist since fcoe_em_alloc() looks for an existing EM
1173 * instance on host list updated by fcoe_hostlist_add().
1174 *
1175 * This is currently handled through the fcoe_config_mutex
1176 * begin held.
1177 */
1178 if (!npiv)
Chris Leech9a057532009-11-03 11:46:40 -08001179 /* lport exch manager allocation */
1180 rc = fcoe_em_config(lport);
Vasu Dev72fa3962011-02-25 15:03:01 -08001181 else {
1182 shost = vport_to_shost(vport);
1183 n_port = shost_priv(shost);
1184 rc = fc_exch_mgr_list_clone(n_port, lport);
1185 }
1186
1187 if (rc) {
1188 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1189 goto out_lp_destroy;
Vasu Dev96316092009-07-29 17:05:00 -07001190 }
1191
Chris Leechaf7f85d2009-08-25 13:59:24 -07001192 return lport;
Vasu Dev7f349142009-03-27 09:06:31 -07001193
1194out_lp_destroy:
Chris Leechaf7f85d2009-08-25 13:59:24 -07001195 fc_exch_mgr_free(lport);
Vasu Dev7f349142009-03-27 09:06:31 -07001196out_host_put:
Neil Hormanf9184df2013-01-15 14:34:40 -05001197 fcoe_hostlist_del(lport);
Chris Leechaf7f85d2009-08-25 13:59:24 -07001198 scsi_host_put(lport->host);
1199out:
1200 return ERR_PTR(rc);
Vasu Dev7f349142009-03-27 09:06:31 -07001201}
1202
1203/**
Robert Love1875f272009-11-03 11:47:50 -08001204 * fcoe_if_init() - Initialization routine for fcoe.ko
Vasu Dev7f349142009-03-27 09:06:31 -07001205 *
Robert Love1875f272009-11-03 11:47:50 -08001206 * Attaches the SW FCoE transport to the FC transport
1207 *
1208 * Returns: 0 on success
Vasu Dev7f349142009-03-27 09:06:31 -07001209 */
1210static int __init fcoe_if_init(void)
1211{
1212 /* attach to scsi transport */
Yi Zou8ca86f82011-01-28 16:05:11 -08001213 fcoe_nport_scsi_transport =
1214 fc_attach_transport(&fcoe_nport_fc_functions);
1215 fcoe_vport_scsi_transport =
1216 fc_attach_transport(&fcoe_vport_fc_functions);
Vasu Dev7f349142009-03-27 09:06:31 -07001217
Yi Zou8ca86f82011-01-28 16:05:11 -08001218 if (!fcoe_nport_scsi_transport) {
Robert Loved5488eb2009-06-10 15:30:59 -07001219 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
Vasu Dev7f349142009-03-27 09:06:31 -07001220 return -ENODEV;
1221 }
1222
1223 return 0;
1224}
1225
1226/**
Robert Love1875f272009-11-03 11:47:50 -08001227 * fcoe_if_exit() - Tear down fcoe.ko
Vasu Dev7f349142009-03-27 09:06:31 -07001228 *
Robert Love1875f272009-11-03 11:47:50 -08001229 * Detaches the SW FCoE transport from the FC transport
1230 *
1231 * Returns: 0 on success
Vasu Dev7f349142009-03-27 09:06:31 -07001232 */
Bart Van Assche7c9c6842012-01-13 17:26:25 -08001233static int __exit fcoe_if_exit(void)
Vasu Dev7f349142009-03-27 09:06:31 -07001234{
Yi Zou8ca86f82011-01-28 16:05:11 -08001235 fc_release_transport(fcoe_nport_scsi_transport);
1236 fc_release_transport(fcoe_vport_scsi_transport);
1237 fcoe_nport_scsi_transport = NULL;
1238 fcoe_vport_scsi_transport = NULL;
Vasu Dev7f349142009-03-27 09:06:31 -07001239 return 0;
1240}
1241
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001242static void fcoe_thread_cleanup_local(unsigned int cpu)
Robert Love8976f422009-03-17 11:41:46 -07001243{
Robert Love8976f422009-03-17 11:41:46 -07001244 struct page *crc_eof;
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001245 struct fcoe_percpu_s *p;
Robert Love8976f422009-03-17 11:41:46 -07001246
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001247 p = per_cpu_ptr(&fcoe_percpu, cpu);
Robert Love8976f422009-03-17 11:41:46 -07001248 spin_lock_bh(&p->fcoe_rx_list.lock);
Robert Love8976f422009-03-17 11:41:46 -07001249 crc_eof = p->crc_eof_page;
1250 p->crc_eof_page = NULL;
1251 p->crc_eof_offset = 0;
1252 spin_unlock_bh(&p->fcoe_rx_list.lock);
1253
Robert Love8976f422009-03-17 11:41:46 -07001254 if (crc_eof)
1255 put_page(crc_eof);
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001256 flush_work(&p->work);
Robert Love8976f422009-03-17 11:41:46 -07001257}
1258
Robert Love8976f422009-03-17 11:41:46 -07001259/**
Kiran Patil064287e2011-06-20 16:59:20 -07001260 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1261 * command.
Kiran Patil064287e2011-06-20 16:59:20 -07001262 *
Vasu Devd2722812011-07-27 15:11:10 -07001263 * This routine selects next CPU based on cpumask to distribute
1264 * incoming requests in round robin.
Kiran Patil064287e2011-06-20 16:59:20 -07001265 *
Vasu Devd2722812011-07-27 15:11:10 -07001266 * Returns: int CPU number
Kiran Patil064287e2011-06-20 16:59:20 -07001267 */
Vasu Devd2722812011-07-27 15:11:10 -07001268static inline unsigned int fcoe_select_cpu(void)
Kiran Patil064287e2011-06-20 16:59:20 -07001269{
1270 static unsigned int selected_cpu;
1271
Vasu Devd2722812011-07-27 15:11:10 -07001272 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1273 if (selected_cpu >= nr_cpu_ids)
1274 selected_cpu = cpumask_first(cpu_online_mask);
1275
Kiran Patil064287e2011-06-20 16:59:20 -07001276 return selected_cpu;
1277}
1278
1279/**
Robert Love1875f272009-11-03 11:47:50 -08001280 * fcoe_rcv() - Receive packets from a net device
1281 * @skb: The received packet
1282 * @netdev: The net device that the packet was received on
1283 * @ptype: The packet type context
1284 * @olddev: The last device net device
Robert Love85b4aa42008-12-09 15:10:24 -08001285 *
Robert Love1875f272009-11-03 11:47:50 -08001286 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1287 * FC frame and passes the frame to libfc.
Robert Love85b4aa42008-12-09 15:10:24 -08001288 *
1289 * Returns: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08001290 */
Bart Van Assche7c9c6842012-01-13 17:26:25 -08001291static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
Robert Love85b4aa42008-12-09 15:10:24 -08001292 struct packet_type *ptype, struct net_device *olddev)
1293{
Robert Love1875f272009-11-03 11:47:50 -08001294 struct fc_lport *lport;
Robert Love85b4aa42008-12-09 15:10:24 -08001295 struct fcoe_rcv_info *fr;
Robert Love619fe4b2012-05-22 19:06:10 -07001296 struct fcoe_ctlr *ctlr;
Chris Leech259ad852009-08-25 13:59:41 -07001297 struct fcoe_interface *fcoe;
Robert Love85b4aa42008-12-09 15:10:24 -08001298 struct fc_frame_header *fh;
Robert Love85b4aa42008-12-09 15:10:24 -08001299 struct fcoe_percpu_s *fps;
Vasu Dev519e5132010-07-20 15:19:32 -07001300 struct ethhdr *eh;
Vasu Devb2f00912009-08-25 13:58:53 -07001301 unsigned int cpu;
Robert Love85b4aa42008-12-09 15:10:24 -08001302
Chris Leech259ad852009-08-25 13:59:41 -07001303 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
Robert Love619fe4b2012-05-22 19:06:10 -07001304 ctlr = fcoe_to_ctlr(fcoe);
1305 lport = ctlr->lp;
Robert Love1875f272009-11-03 11:47:50 -08001306 if (unlikely(!lport)) {
Bart Van Assche465b87b2013-08-14 15:42:09 +00001307 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
Robert Love85b4aa42008-12-09 15:10:24 -08001308 goto err2;
1309 }
Robert Love1875f272009-11-03 11:47:50 -08001310 if (!lport->link_up)
Joe Eykholt97c83892009-03-17 11:42:40 -07001311 goto err2;
Robert Love85b4aa42008-12-09 15:10:24 -08001312
Bart Van Assche465b87b2013-08-14 15:42:09 +00001313 FCOE_NETDEV_DBG(netdev,
1314 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
Robert Loved5488eb2009-06-10 15:30:59 -07001315 skb->len, skb->data_len, skb->head, skb->data,
1316 skb_tail_pointer(skb), skb_end_pointer(skb),
1317 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
Robert Love85b4aa42008-12-09 15:10:24 -08001318
Neil Horman8b6124342013-08-03 10:45:54 +00001319
1320 skb = skb_share_check(skb, GFP_ATOMIC);
1321
1322 if (skb == NULL)
1323 return NET_RX_DROP;
1324
Vasu Dev519e5132010-07-20 15:19:32 -07001325 eh = eth_hdr(skb);
Vasu Dev519e5132010-07-20 15:19:32 -07001326
Robert Love619fe4b2012-05-22 19:06:10 -07001327 if (is_fip_mode(ctlr) &&
Joe Perches6942df72013-09-02 03:32:33 +00001328 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
Vasu Dev519e5132010-07-20 15:19:32 -07001329 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1330 eh->h_source);
Robert Love85b4aa42008-12-09 15:10:24 -08001331 goto err;
1332 }
1333
1334 /*
1335 * Check for minimum frame length, and make sure required FCoE
1336 * and FC headers are pulled into the linear data area.
1337 */
1338 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
Robert Love1875f272009-11-03 11:47:50 -08001339 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
Robert Love85b4aa42008-12-09 15:10:24 -08001340 goto err;
1341
1342 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1343 fh = (struct fc_frame_header *) skb_transport_header(skb);
1344
Robert Love0ee31cb2010-10-08 17:12:46 -07001345 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1346 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1347 eh->h_dest);
1348 goto err;
1349 }
1350
Robert Love85b4aa42008-12-09 15:10:24 -08001351 fr = fcoe_dev_from_skb(skb);
Robert Love1875f272009-11-03 11:47:50 -08001352 fr->fr_dev = lport;
Robert Love5e5e92d2009-03-17 11:41:35 -07001353
Robert Love85b4aa42008-12-09 15:10:24 -08001354 /*
Vasu Devb2f00912009-08-25 13:58:53 -07001355 * In case the incoming frame's exchange is originated from
1356 * the initiator, then received frame's exchange id is ANDed
1357 * with fc_cpu_mask bits to get the same cpu on which exchange
Vasu Devd2722812011-07-27 15:11:10 -07001358 * was originated, otherwise select cpu using rx exchange id
1359 * or fcoe_select_cpu().
Robert Love85b4aa42008-12-09 15:10:24 -08001360 */
Vasu Devb2f00912009-08-25 13:58:53 -07001361 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1362 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
Kiran Patil064287e2011-06-20 16:59:20 -07001363 else {
Vasu Devd2722812011-07-27 15:11:10 -07001364 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1365 cpu = fcoe_select_cpu();
1366 else
Kiran Patil29bdd2b2011-06-20 16:59:25 -07001367 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
Kiran Patil064287e2011-06-20 16:59:20 -07001368 }
Vasu Dev324f6672011-07-27 15:10:39 -07001369
1370 if (cpu >= nr_cpu_ids)
1371 goto err;
1372
Robert Love8976f422009-03-17 11:41:46 -07001373 fps = &per_cpu(fcoe_percpu, cpu);
Neil Horman94aa29f2012-03-09 14:50:08 -08001374 spin_lock(&fps->fcoe_rx_list.lock);
Robert Love8976f422009-03-17 11:41:46 -07001375 /*
1376 * We now have a valid CPU that we're targeting for
1377 * this skb. We also have this receive thread locked,
1378 * so we're free to queue skbs into it's queue.
1379 */
Robert Love85b4aa42008-12-09 15:10:24 -08001380
Neil Horman5e70c4c2012-03-09 14:49:48 -08001381 /*
1382 * Note: We used to have a set of conditions under which we would
1383 * call fcoe_recv_frame directly, rather than queuing to the rx list
1384 * as it could save a few cycles, but doing so is prohibited, as
1385 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1386 * in softirq context.
Chris Leech859b7b62009-11-20 14:54:47 -08001387 */
Neil Horman5e70c4c2012-03-09 14:49:48 -08001388 __skb_queue_tail(&fps->fcoe_rx_list, skb);
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001389 schedule_work_on(cpu, &fps->work);
Neil Horman94aa29f2012-03-09 14:50:08 -08001390 spin_unlock(&fps->fcoe_rx_list.lock);
Robert Love85b4aa42008-12-09 15:10:24 -08001391
Neil Horman34bac2e2013-08-03 10:45:55 +00001392 return NET_RX_SUCCESS;
Robert Love85b4aa42008-12-09 15:10:24 -08001393err:
Vasu Dev1bd49b42012-05-25 10:26:43 -07001394 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
Joe Eykholtf018b732010-03-12 16:08:55 -08001395 put_cpu();
Robert Love85b4aa42008-12-09 15:10:24 -08001396err2:
1397 kfree_skb(skb);
Neil Horman34bac2e2013-08-03 10:45:55 +00001398 return NET_RX_DROP;
Robert Love85b4aa42008-12-09 15:10:24 -08001399}
Robert Love85b4aa42008-12-09 15:10:24 -08001400
1401/**
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08001402 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
Robert Love1875f272009-11-03 11:47:50 -08001403 * @skb: The packet to be transmitted
1404 * @tlen: The total length of the trailer
1405 *
Robert Love85b4aa42008-12-09 15:10:24 -08001406 * Returns: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08001407 */
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08001408static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
Robert Love85b4aa42008-12-09 15:10:24 -08001409{
1410 struct fcoe_percpu_s *fps;
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08001411 int rc;
Robert Love85b4aa42008-12-09 15:10:24 -08001412
Robert Love5e5e92d2009-03-17 11:41:35 -07001413 fps = &get_cpu_var(fcoe_percpu);
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08001414 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
Robert Love5e5e92d2009-03-17 11:41:35 -07001415 put_cpu_var(fcoe_percpu);
Robert Love85b4aa42008-12-09 15:10:24 -08001416
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08001417 return rc;
Robert Love85b4aa42008-12-09 15:10:24 -08001418}
Robert Love85b4aa42008-12-09 15:10:24 -08001419
1420/**
Robert Love1875f272009-11-03 11:47:50 -08001421 * fcoe_xmit() - Transmit a FCoE frame
1422 * @lport: The local port that the frame is to be transmitted for
1423 * @fp: The frame to be transmitted
Robert Love85b4aa42008-12-09 15:10:24 -08001424 *
Robert Love1875f272009-11-03 11:47:50 -08001425 * Return: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08001426 */
Bart Van Assche7c9c6842012-01-13 17:26:25 -08001427static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
Robert Love85b4aa42008-12-09 15:10:24 -08001428{
Vasu Dev4bb6b512009-05-06 10:52:34 -07001429 int wlen;
Robert Love85b4aa42008-12-09 15:10:24 -08001430 u32 crc;
1431 struct ethhdr *eh;
1432 struct fcoe_crc_eof *cp;
1433 struct sk_buff *skb;
Vasu Dev1bd49b42012-05-25 10:26:43 -07001434 struct fc_stats *stats;
Robert Love85b4aa42008-12-09 15:10:24 -08001435 struct fc_frame_header *fh;
1436 unsigned int hlen; /* header length implies the version */
1437 unsigned int tlen; /* trailer length */
1438 unsigned int elen; /* eth header, may include vlan */
Robert Love1875f272009-11-03 11:47:50 -08001439 struct fcoe_port *port = lport_priv(lport);
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08001440 struct fcoe_interface *fcoe = port->priv;
Robert Love619fe4b2012-05-22 19:06:10 -07001441 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
Robert Love85b4aa42008-12-09 15:10:24 -08001442 u8 sof, eof;
1443 struct fcoe_hdr *hp;
1444
1445 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1446
Robert Love85b4aa42008-12-09 15:10:24 -08001447 fh = fc_frame_header_get(fp);
Joe Eykholt97c83892009-03-17 11:42:40 -07001448 skb = fp_skb(fp);
1449 wlen = skb->len / FCOE_WORD_TO_BYTE;
1450
Robert Love1875f272009-11-03 11:47:50 -08001451 if (!lport->link_up) {
Dan Carpenter3caf02e2009-04-21 16:27:25 -07001452 kfree_skb(skb);
Joe Eykholt97c83892009-03-17 11:42:40 -07001453 return 0;
Robert Love85b4aa42008-12-09 15:10:24 -08001454 }
1455
Joe Eykholt9860eeb2010-03-12 16:07:52 -08001456 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
Robert Love619fe4b2012-05-22 19:06:10 -07001457 fcoe_ctlr_els_send(ctlr, lport, skb))
Joe Eykholt97c83892009-03-17 11:42:40 -07001458 return 0;
1459
Robert Love85b4aa42008-12-09 15:10:24 -08001460 sof = fr_sof(fp);
1461 eof = fr_eof(fp);
1462
Vasu Dev4e57e1c2009-05-06 10:52:46 -07001463 elen = sizeof(struct ethhdr);
Robert Love85b4aa42008-12-09 15:10:24 -08001464 hlen = sizeof(struct fcoe_hdr);
1465 tlen = sizeof(struct fcoe_crc_eof);
1466 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1467
1468 /* crc offload */
Robert Love1875f272009-11-03 11:47:50 -08001469 if (likely(lport->crc_offload)) {
Tom Herbert253aab02015-12-14 11:19:42 -08001470 skb->ip_summed = CHECKSUM_PARTIAL;
Robert Love85b4aa42008-12-09 15:10:24 -08001471 skb->csum_start = skb_headroom(skb);
1472 skb->csum_offset = skb->len;
1473 crc = 0;
1474 } else {
1475 skb->ip_summed = CHECKSUM_NONE;
1476 crc = fcoe_fc_crc(fp);
1477 }
1478
Chris Leech014f5c32009-08-25 13:59:30 -07001479 /* copy port crc and eof to the skb buff */
Robert Love85b4aa42008-12-09 15:10:24 -08001480 if (skb_is_nonlinear(skb)) {
1481 skb_frag_t *frag;
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08001482 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
Roel Kluine9041582009-02-27 10:56:22 -08001483 kfree_skb(skb);
Robert Love85b4aa42008-12-09 15:10:24 -08001484 return -ENOMEM;
1485 }
1486 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
Cong Wang77dfce02011-11-25 23:14:23 +08001487 cp = kmap_atomic(skb_frag_page(frag))
Robert Love85b4aa42008-12-09 15:10:24 -08001488 + frag->page_offset;
1489 } else {
1490 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1491 }
1492
1493 memset(cp, 0, sizeof(*cp));
1494 cp->fcoe_eof = eof;
1495 cp->fcoe_crc32 = cpu_to_le32(~crc);
1496
1497 if (skb_is_nonlinear(skb)) {
Cong Wang77dfce02011-11-25 23:14:23 +08001498 kunmap_atomic(cp);
Robert Love85b4aa42008-12-09 15:10:24 -08001499 cp = NULL;
1500 }
1501
Chris Leech014f5c32009-08-25 13:59:30 -07001502 /* adjust skb network/transport offsets to match mac/fcoe/port */
Robert Love85b4aa42008-12-09 15:10:24 -08001503 skb_push(skb, elen + hlen);
1504 skb_reset_mac_header(skb);
1505 skb_reset_network_header(skb);
1506 skb->mac_len = elen;
Yi Zou211c7382009-02-27 14:06:37 -08001507 skb->protocol = htons(ETH_P_FCOE);
Neerav Parikh31c37a62012-09-24 11:52:45 -07001508 skb->priority = fcoe->priority;
john fastabend6f6c2aa2011-11-18 13:35:56 -08001509
Vasu Devd1483bb2011-09-27 21:38:13 -07001510 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
Patrick McHardyf6469682013-04-19 02:04:27 +00001511 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
Robert Love2884d422013-06-19 01:56:54 +00001512 /* must set skb->dev before calling vlan_put_tag */
Vasu Devd1483bb2011-09-27 21:38:13 -07001513 skb->dev = fcoe->realdev;
Jiri Pirkob960a0ac2014-11-19 14:04:56 +01001514 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1515 vlan_dev_vlan_id(fcoe->netdev));
Vasu Devd1483bb2011-09-27 21:38:13 -07001516 } else
1517 skb->dev = fcoe->netdev;
Robert Love85b4aa42008-12-09 15:10:24 -08001518
1519 /* fill up mac and fcoe headers */
1520 eh = eth_hdr(skb);
1521 eh->h_proto = htons(ETH_P_FCOE);
Robert Love619fe4b2012-05-22 19:06:10 -07001522 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1523 if (ctlr->map_dest)
Joe Eykholtcd229e42010-07-20 15:20:40 -07001524 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
Robert Love85b4aa42008-12-09 15:10:24 -08001525
Robert Love619fe4b2012-05-22 19:06:10 -07001526 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1527 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
Robert Love85b4aa42008-12-09 15:10:24 -08001528 else
Chris Leech11b56182009-11-03 11:46:29 -08001529 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
Robert Love85b4aa42008-12-09 15:10:24 -08001530
1531 hp = (struct fcoe_hdr *)(eh + 1);
1532 memset(hp, 0, sizeof(*hp));
1533 if (FC_FCOE_VER)
1534 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1535 hp->fcoe_sof = sof;
1536
Yi Zou39ca9a02009-02-27 14:07:15 -08001537 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
Robert Love1875f272009-11-03 11:47:50 -08001538 if (lport->seq_offload && fr_max_payload(fp)) {
Yi Zou39ca9a02009-02-27 14:07:15 -08001539 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1540 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1541 } else {
1542 skb_shinfo(skb)->gso_type = 0;
1543 skb_shinfo(skb)->gso_size = 0;
1544 }
Robert Love85b4aa42008-12-09 15:10:24 -08001545 /* update tx stats: regardless if LLD fails */
Vasu Dev1bd49b42012-05-25 10:26:43 -07001546 stats = per_cpu_ptr(lport->stats, get_cpu());
Robert Love582b45b2009-03-31 15:51:50 -07001547 stats->TxFrames++;
1548 stats->TxWords += wlen;
Joe Eykholtf018b732010-03-12 16:08:55 -08001549 put_cpu();
Robert Love85b4aa42008-12-09 15:10:24 -08001550
1551 /* send down to lld */
Robert Love1875f272009-11-03 11:47:50 -08001552 fr_dev(fp) = lport;
Vasu Dev980f5152011-07-27 15:11:05 -07001553 fcoe_port_send(port, skb);
Robert Love85b4aa42008-12-09 15:10:24 -08001554 return 0;
1555}
Robert Love85b4aa42008-12-09 15:10:24 -08001556
Robert Love34f42a02009-02-27 10:55:45 -08001557/**
Vasu Dev52ee8322011-01-28 16:03:52 -08001558 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1559 * @lport: The local port the frame was received on
1560 * @fp: The received frame
1561 *
1562 * Return: 0 on passing filtering checks
1563 */
1564static inline int fcoe_filter_frames(struct fc_lport *lport,
1565 struct fc_frame *fp)
1566{
Robert Love619fe4b2012-05-22 19:06:10 -07001567 struct fcoe_ctlr *ctlr;
Vasu Dev52ee8322011-01-28 16:03:52 -08001568 struct fcoe_interface *fcoe;
1569 struct fc_frame_header *fh;
1570 struct sk_buff *skb = (struct sk_buff *)fp;
Vasu Dev1bd49b42012-05-25 10:26:43 -07001571 struct fc_stats *stats;
Vasu Dev52ee8322011-01-28 16:03:52 -08001572
1573 /*
1574 * We only check CRC if no offload is available and if it is
1575 * it's solicited data, in which case, the FCP layer would
1576 * check it during the copy.
1577 */
1578 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1579 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1580 else
1581 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1582
1583 fh = (struct fc_frame_header *) skb_transport_header(skb);
1584 fh = fc_frame_header_get(fp);
1585 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1586 return 0;
1587
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08001588 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
Robert Love619fe4b2012-05-22 19:06:10 -07001589 ctlr = fcoe_to_ctlr(fcoe);
1590 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
Vasu Dev52ee8322011-01-28 16:03:52 -08001591 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1592 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1593 return -EINVAL;
1594 }
1595
Dan Carpenterf2f96d22011-02-25 15:03:23 -08001596 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
Vasu Dev52ee8322011-01-28 16:03:52 -08001597 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1598 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1599 return 0;
1600 }
1601
Vasu Dev1bd49b42012-05-25 10:26:43 -07001602 stats = per_cpu_ptr(lport->stats, get_cpu());
Vasu Dev52ee8322011-01-28 16:03:52 -08001603 stats->InvalidCRCCount++;
1604 if (stats->InvalidCRCCount < 5)
1605 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
Thomas Gleixner7e1e7ea2011-11-11 20:52:01 +01001606 put_cpu();
Vasu Dev52ee8322011-01-28 16:03:52 -08001607 return -EINVAL;
1608}
1609
1610/**
Chris Leech859b7b62009-11-20 14:54:47 -08001611 * fcoe_recv_frame() - process a single received frame
1612 * @skb: frame to process
1613 */
1614static void fcoe_recv_frame(struct sk_buff *skb)
1615{
1616 u32 fr_len;
1617 struct fc_lport *lport;
1618 struct fcoe_rcv_info *fr;
Vasu Dev1bd49b42012-05-25 10:26:43 -07001619 struct fc_stats *stats;
Chris Leech859b7b62009-11-20 14:54:47 -08001620 struct fcoe_crc_eof crc_eof;
1621 struct fc_frame *fp;
Chris Leech859b7b62009-11-20 14:54:47 -08001622 struct fcoe_port *port;
1623 struct fcoe_hdr *hp;
1624
1625 fr = fcoe_dev_from_skb(skb);
1626 lport = fr->fr_dev;
1627 if (unlikely(!lport)) {
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001628 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
Chris Leech859b7b62009-11-20 14:54:47 -08001629 kfree_skb(skb);
1630 return;
1631 }
1632
Bart Van Assche465b87b2013-08-14 15:42:09 +00001633 FCOE_NETDEV_DBG(skb->dev,
1634 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
Chris Leech859b7b62009-11-20 14:54:47 -08001635 skb->len, skb->data_len,
1636 skb->head, skb->data, skb_tail_pointer(skb),
1637 skb_end_pointer(skb), skb->csum,
1638 skb->dev ? skb->dev->name : "<NULL>");
1639
Chris Leech859b7b62009-11-20 14:54:47 -08001640 port = lport_priv(lport);
Robert Lovef1633012011-12-16 14:24:49 -08001641 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
Chris Leech859b7b62009-11-20 14:54:47 -08001642
1643 /*
1644 * Frame length checks and setting up the header pointers
1645 * was done in fcoe_rcv already.
1646 */
1647 hp = (struct fcoe_hdr *) skb_network_header(skb);
Chris Leech859b7b62009-11-20 14:54:47 -08001648
Vasu Dev1bd49b42012-05-25 10:26:43 -07001649 stats = per_cpu_ptr(lport->stats, get_cpu());
Chris Leech859b7b62009-11-20 14:54:47 -08001650 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1651 if (stats->ErrorFrames < 5)
1652 printk(KERN_WARNING "fcoe: FCoE version "
1653 "mismatch: The frame has "
1654 "version %x, but the "
1655 "initiator supports version "
1656 "%x\n", FC_FCOE_DECAPS_VER(hp),
1657 FC_FCOE_VER);
Joe Eykholtf018b732010-03-12 16:08:55 -08001658 goto drop;
Chris Leech859b7b62009-11-20 14:54:47 -08001659 }
1660
1661 skb_pull(skb, sizeof(struct fcoe_hdr));
1662 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1663
1664 stats->RxFrames++;
1665 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1666
1667 fp = (struct fc_frame *)skb;
1668 fc_frame_init(fp);
1669 fr_dev(fp) = lport;
1670 fr_sof(fp) = hp->fcoe_sof;
1671
1672 /* Copy out the CRC and EOF trailer for access */
Joe Eykholtf018b732010-03-12 16:08:55 -08001673 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1674 goto drop;
Chris Leech859b7b62009-11-20 14:54:47 -08001675 fr_eof(fp) = crc_eof.fcoe_eof;
1676 fr_crc(fp) = crc_eof.fcoe_crc32;
Joe Eykholtf018b732010-03-12 16:08:55 -08001677 if (pskb_trim(skb, fr_len))
1678 goto drop;
Chris Leech859b7b62009-11-20 14:54:47 -08001679
Vasu Dev52ee8322011-01-28 16:03:52 -08001680 if (!fcoe_filter_frames(lport, fp)) {
1681 put_cpu();
1682 fc_exch_recv(lport, fp);
1683 return;
Chris Leech859b7b62009-11-20 14:54:47 -08001684 }
Joe Eykholtf018b732010-03-12 16:08:55 -08001685drop:
1686 stats->ErrorFrames++;
1687 put_cpu();
1688 kfree_skb(skb);
Chris Leech859b7b62009-11-20 14:54:47 -08001689}
1690
1691/**
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001692 * fcoe_receive_work() - The per-CPU worker
1693 * @work: The work struct
Robert Love85b4aa42008-12-09 15:10:24 -08001694 *
Robert Love85b4aa42008-12-09 15:10:24 -08001695 */
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001696static void fcoe_receive_work(struct work_struct *work)
Robert Love85b4aa42008-12-09 15:10:24 -08001697{
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001698 struct fcoe_percpu_s *p;
Robert Love85b4aa42008-12-09 15:10:24 -08001699 struct sk_buff *skb;
Neil Horman20dc3812012-03-09 14:50:24 -08001700 struct sk_buff_head tmp;
1701
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001702 p = container_of(work, struct fcoe_percpu_s, work);
Neil Horman20dc3812012-03-09 14:50:24 -08001703 skb_queue_head_init(&tmp);
Robert Love85b4aa42008-12-09 15:10:24 -08001704
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001705 spin_lock_bh(&p->fcoe_rx_list.lock);
1706 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1707 spin_unlock_bh(&p->fcoe_rx_list.lock);
Robert Love85b4aa42008-12-09 15:10:24 -08001708
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001709 if (!skb_queue_len(&tmp))
1710 return;
Robert Love85b4aa42008-12-09 15:10:24 -08001711
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02001712 while ((skb = __skb_dequeue(&tmp)))
1713 fcoe_recv_frame(skb);
Robert Love85b4aa42008-12-09 15:10:24 -08001714}
1715
1716/**
Robert Love1875f272009-11-03 11:47:50 -08001717 * fcoe_dev_setup() - Setup the link change notification interface
Robert Love34f42a02009-02-27 10:55:45 -08001718 */
Randy Dunlapb0d428a2009-04-27 21:49:31 -07001719static void fcoe_dev_setup(void)
Robert Love85b4aa42008-12-09 15:10:24 -08001720{
john fastabend6f6c2aa2011-11-18 13:35:56 -08001721 register_dcbevent_notifier(&dcb_notifier);
Robert Love85b4aa42008-12-09 15:10:24 -08001722 register_netdevice_notifier(&fcoe_notifier);
1723}
1724
1725/**
Robert Love1875f272009-11-03 11:47:50 -08001726 * fcoe_dev_cleanup() - Cleanup the link change notification interface
Robert Love34f42a02009-02-27 10:55:45 -08001727 */
Robert Love85b4aa42008-12-09 15:10:24 -08001728static void fcoe_dev_cleanup(void)
1729{
john fastabend6f6c2aa2011-11-18 13:35:56 -08001730 unregister_dcbevent_notifier(&dcb_notifier);
Robert Love85b4aa42008-12-09 15:10:24 -08001731 unregister_netdevice_notifier(&fcoe_notifier);
1732}
1733
john fastabend6f6c2aa2011-11-18 13:35:56 -08001734static struct fcoe_interface *
1735fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1736{
1737 struct fcoe_interface *fcoe;
1738 struct net_device *real_dev;
1739
1740 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1741 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1742 real_dev = vlan_dev_real_dev(fcoe->netdev);
1743 else
1744 real_dev = fcoe->netdev;
1745
1746 if (netdev == real_dev)
1747 return fcoe;
1748 }
1749 return NULL;
1750}
1751
1752static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1753 ulong event, void *ptr)
1754{
1755 struct dcb_app_type *entry = ptr;
Robert Love619fe4b2012-05-22 19:06:10 -07001756 struct fcoe_ctlr *ctlr;
john fastabend6f6c2aa2011-11-18 13:35:56 -08001757 struct fcoe_interface *fcoe;
1758 struct net_device *netdev;
john fastabend6f6c2aa2011-11-18 13:35:56 -08001759 int prio;
1760
1761 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1762 return NOTIFY_OK;
1763
1764 netdev = dev_get_by_index(&init_net, entry->ifindex);
1765 if (!netdev)
1766 return NOTIFY_OK;
1767
1768 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1769 dev_put(netdev);
1770 if (!fcoe)
1771 return NOTIFY_OK;
1772
Robert Love619fe4b2012-05-22 19:06:10 -07001773 ctlr = fcoe_to_ctlr(fcoe);
1774
john fastabend6f6c2aa2011-11-18 13:35:56 -08001775 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1776 prio = ffs(entry->app.priority) - 1;
1777 else
1778 prio = entry->app.priority;
1779
1780 if (prio < 0)
1781 return NOTIFY_OK;
1782
1783 if (entry->app.protocol == ETH_P_FIP ||
1784 entry->app.protocol == ETH_P_FCOE)
Robert Love619fe4b2012-05-22 19:06:10 -07001785 ctlr->priority = prio;
john fastabend6f6c2aa2011-11-18 13:35:56 -08001786
Neerav Parikh31c37a62012-09-24 11:52:45 -07001787 if (entry->app.protocol == ETH_P_FCOE)
1788 fcoe->priority = prio;
john fastabend6f6c2aa2011-11-18 13:35:56 -08001789
1790 return NOTIFY_OK;
1791}
1792
Robert Love85b4aa42008-12-09 15:10:24 -08001793/**
Robert Love1875f272009-11-03 11:47:50 -08001794 * fcoe_device_notification() - Handler for net device events
1795 * @notifier: The context of the notification
1796 * @event: The type of event
1797 * @ptr: The net device that the event was on
Robert Love85b4aa42008-12-09 15:10:24 -08001798 *
Robert Love1875f272009-11-03 11:47:50 -08001799 * This function is called by the Ethernet driver in case of link change event.
Robert Love85b4aa42008-12-09 15:10:24 -08001800 *
1801 * Returns: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08001802 */
Robert Love85b4aa42008-12-09 15:10:24 -08001803static int fcoe_device_notification(struct notifier_block *notifier,
1804 ulong event, void *ptr)
1805{
Robert Love435c8662012-11-27 06:53:35 +00001806 struct fcoe_ctlr_device *cdev;
Robert Love1875f272009-11-03 11:47:50 -08001807 struct fc_lport *lport = NULL;
Jiri Pirko351638e2013-05-28 01:30:21 +00001808 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
Robert Love619fe4b2012-05-22 19:06:10 -07001809 struct fcoe_ctlr *ctlr;
Chris Leech014f5c32009-08-25 13:59:30 -07001810 struct fcoe_interface *fcoe;
Chris Leech2e70e242009-08-25 14:00:23 -07001811 struct fcoe_port *port;
Vasu Dev1bd49b42012-05-25 10:26:43 -07001812 struct fc_stats *stats;
Joe Eykholt97c83892009-03-17 11:42:40 -07001813 u32 link_possible = 1;
Robert Love85b4aa42008-12-09 15:10:24 -08001814 u32 mfs;
1815 int rc = NOTIFY_OK;
1816
Chris Leech014f5c32009-08-25 13:59:30 -07001817 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
Chris Leech25024982009-08-25 13:59:35 -07001818 if (fcoe->netdev == netdev) {
Robert Love619fe4b2012-05-22 19:06:10 -07001819 ctlr = fcoe_to_ctlr(fcoe);
1820 lport = ctlr->lp;
Robert Love85b4aa42008-12-09 15:10:24 -08001821 break;
1822 }
1823 }
Robert Love1875f272009-11-03 11:47:50 -08001824 if (!lport) {
Robert Love85b4aa42008-12-09 15:10:24 -08001825 rc = NOTIFY_DONE;
1826 goto out;
1827 }
1828
Robert Love85b4aa42008-12-09 15:10:24 -08001829 switch (event) {
1830 case NETDEV_DOWN:
1831 case NETDEV_GOING_DOWN:
Joe Eykholt97c83892009-03-17 11:42:40 -07001832 link_possible = 0;
Robert Love85b4aa42008-12-09 15:10:24 -08001833 break;
1834 case NETDEV_UP:
1835 case NETDEV_CHANGE:
Robert Love85b4aa42008-12-09 15:10:24 -08001836 break;
1837 case NETDEV_CHANGEMTU:
Yi Zou7221d7e2009-10-21 16:27:52 -07001838 if (netdev->features & NETIF_F_FCOE_MTU)
1839 break;
Vasu Dev1d1b88d2009-07-29 17:05:45 -07001840 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1841 sizeof(struct fcoe_crc_eof));
Robert Love85b4aa42008-12-09 15:10:24 -08001842 if (mfs >= FC_MIN_MAX_FRAME)
Robert Love1875f272009-11-03 11:47:50 -08001843 fc_set_mfs(lport, mfs);
Robert Love85b4aa42008-12-09 15:10:24 -08001844 break;
1845 case NETDEV_REGISTER:
1846 break;
Chris Leech2e70e242009-08-25 14:00:23 -07001847 case NETDEV_UNREGISTER:
1848 list_del(&fcoe->list);
Robert Love619fe4b2012-05-22 19:06:10 -07001849 port = lport_priv(ctlr->lp);
Tejun Heo2ca32b42011-01-28 16:05:32 -08001850 queue_work(fcoe_wq, &port->destroy_work);
Chris Leech2e70e242009-08-25 14:00:23 -07001851 goto out;
1852 break;
Yi Zou54a5b212010-07-20 15:21:17 -07001853 case NETDEV_FEAT_CHANGE:
1854 fcoe_netdev_features_change(lport, netdev);
1855 break;
Robert Love85b4aa42008-12-09 15:10:24 -08001856 default:
Vasu Dev1d1b88d2009-07-29 17:05:45 -07001857 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
Robert Loved5488eb2009-06-10 15:30:59 -07001858 "from netdev netlink\n", event);
Robert Love85b4aa42008-12-09 15:10:24 -08001859 }
Robert Love5e4f8fe2010-05-07 15:18:35 -07001860
1861 fcoe_link_speed_update(lport);
1862
Robert Love435c8662012-11-27 06:53:35 +00001863 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
1864
1865 if (link_possible && !fcoe_link_ok(lport)) {
1866 switch (cdev->enabled) {
1867 case FCOE_CTLR_DISABLED:
1868 pr_info("Link up while interface is disabled.\n");
1869 break;
1870 case FCOE_CTLR_ENABLED:
1871 case FCOE_CTLR_UNUSED:
1872 fcoe_ctlr_link_up(ctlr);
1873 };
1874 } else if (fcoe_ctlr_link_down(ctlr)) {
1875 switch (cdev->enabled) {
1876 case FCOE_CTLR_DISABLED:
1877 pr_info("Link down while interface is disabled.\n");
1878 break;
1879 case FCOE_CTLR_ENABLED:
1880 case FCOE_CTLR_UNUSED:
1881 stats = per_cpu_ptr(lport->stats, get_cpu());
1882 stats->LinkFailureCount++;
1883 put_cpu();
1884 fcoe_clean_pending_queue(lport);
1885 };
Robert Love85b4aa42008-12-09 15:10:24 -08001886 }
1887out:
1888 return rc;
1889}
1890
1891/**
Vasu Dev55a66d32009-12-10 09:59:31 -08001892 * fcoe_disable() - Disables a FCoE interface
Yi Zou78a58242011-01-28 16:05:16 -08001893 * @netdev : The net_device object the Ethernet interface to create on
Vasu Dev55a66d32009-12-10 09:59:31 -08001894 *
Yi Zou78a58242011-01-28 16:05:16 -08001895 * Called from fcoe transport.
Vasu Dev55a66d32009-12-10 09:59:31 -08001896 *
1897 * Returns: 0 for success
Robert Love435c8662012-11-27 06:53:35 +00001898 *
1899 * Deprecated: use fcoe_ctlr_enabled()
Vasu Dev55a66d32009-12-10 09:59:31 -08001900 */
Yi Zou78a58242011-01-28 16:05:16 -08001901static int fcoe_disable(struct net_device *netdev)
Vasu Dev55a66d32009-12-10 09:59:31 -08001902{
Robert Love619fe4b2012-05-22 19:06:10 -07001903 struct fcoe_ctlr *ctlr;
Vasu Dev55a66d32009-12-10 09:59:31 -08001904 struct fcoe_interface *fcoe;
Vasu Dev55a66d32009-12-10 09:59:31 -08001905 int rc = 0;
1906
1907 mutex_lock(&fcoe_config_mutex);
Vasu Dev55a66d32009-12-10 09:59:31 -08001908
Robert Loveee5df622011-04-01 16:05:59 -07001909 rtnl_lock();
Vasu Dev55a66d32009-12-10 09:59:31 -08001910 fcoe = fcoe_hostlist_lookup_port(netdev);
1911 rtnl_unlock();
1912
Chris Leech9ee50e42010-04-09 14:22:23 -07001913 if (fcoe) {
Robert Love619fe4b2012-05-22 19:06:10 -07001914 ctlr = fcoe_to_ctlr(fcoe);
1915 fcoe_ctlr_link_down(ctlr);
1916 fcoe_clean_pending_queue(ctlr->lp);
Chris Leech9ee50e42010-04-09 14:22:23 -07001917 } else
Vasu Dev55a66d32009-12-10 09:59:31 -08001918 rc = -ENODEV;
1919
Vasu Dev55a66d32009-12-10 09:59:31 -08001920 mutex_unlock(&fcoe_config_mutex);
1921 return rc;
1922}
1923
1924/**
1925 * fcoe_enable() - Enables a FCoE interface
Yi Zou78a58242011-01-28 16:05:16 -08001926 * @netdev : The net_device object the Ethernet interface to create on
Vasu Dev55a66d32009-12-10 09:59:31 -08001927 *
Yi Zou78a58242011-01-28 16:05:16 -08001928 * Called from fcoe transport.
Vasu Dev55a66d32009-12-10 09:59:31 -08001929 *
1930 * Returns: 0 for success
1931 */
Yi Zou78a58242011-01-28 16:05:16 -08001932static int fcoe_enable(struct net_device *netdev)
Vasu Dev55a66d32009-12-10 09:59:31 -08001933{
Robert Love619fe4b2012-05-22 19:06:10 -07001934 struct fcoe_ctlr *ctlr;
Vasu Dev55a66d32009-12-10 09:59:31 -08001935 struct fcoe_interface *fcoe;
Vasu Dev55a66d32009-12-10 09:59:31 -08001936 int rc = 0;
1937
1938 mutex_lock(&fcoe_config_mutex);
Robert Loveee5df622011-04-01 16:05:59 -07001939 rtnl_lock();
Vasu Dev55a66d32009-12-10 09:59:31 -08001940 fcoe = fcoe_hostlist_lookup_port(netdev);
1941 rtnl_unlock();
1942
Robert Love619fe4b2012-05-22 19:06:10 -07001943 if (!fcoe) {
Vasu Dev55a66d32009-12-10 09:59:31 -08001944 rc = -ENODEV;
Robert Love619fe4b2012-05-22 19:06:10 -07001945 goto out;
1946 }
Vasu Dev55a66d32009-12-10 09:59:31 -08001947
Robert Love619fe4b2012-05-22 19:06:10 -07001948 ctlr = fcoe_to_ctlr(fcoe);
1949
1950 if (!fcoe_link_ok(ctlr->lp))
1951 fcoe_ctlr_link_up(ctlr);
1952
1953out:
Vasu Dev55a66d32009-12-10 09:59:31 -08001954 mutex_unlock(&fcoe_config_mutex);
1955 return rc;
1956}
1957
1958/**
Robert Love435c8662012-11-27 06:53:35 +00001959 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
1960 * @cdev: The FCoE Controller that is being enabled or disabled
1961 *
1962 * fcoe_sysfs will ensure that the state of 'enabled' has
1963 * changed, so no checking is necessary here. This routine simply
1964 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
1965 * When those routines are removed the functionality can be merged
1966 * here.
1967 */
1968static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
1969{
1970 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
1971 struct fc_lport *lport = ctlr->lp;
1972 struct net_device *netdev = fcoe_netdev(lport);
1973
1974 switch (cdev->enabled) {
1975 case FCOE_CTLR_ENABLED:
1976 return fcoe_enable(netdev);
1977 case FCOE_CTLR_DISABLED:
1978 return fcoe_disable(netdev);
1979 case FCOE_CTLR_UNUSED:
1980 default:
1981 return -ENOTSUPP;
1982 };
1983}
1984
1985/**
Hannes Reineckea87dccc2016-07-04 10:29:21 +02001986 * fcoe_ctlr_mode() - Switch FIP mode
1987 * @cdev: The FCoE Controller that is being modified
1988 *
1989 * When the FIP mode has been changed we need to update
1990 * the multicast addresses to ensure we get the correct
1991 * frames.
1992 */
1993static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev)
1994{
1995 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
1996 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
1997
1998 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN &&
1999 ctlr->mode != FIP_MODE_VN2VN) {
2000 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS);
2001 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2002 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS);
2003 } else if (ctlr->mode != FIP_MODE_FABRIC) {
2004 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2005 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS);
2006 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS);
2007 }
2008 fcoe_ctlr_set_fip_mode(ctlr_dev);
2009}
2010
2011/**
Robert Love1875f272009-11-03 11:47:50 -08002012 * fcoe_destroy() - Destroy a FCoE interface
Yi Zou78a58242011-01-28 16:05:16 -08002013 * @netdev : The net_device object the Ethernet interface to create on
Robert Love1875f272009-11-03 11:47:50 -08002014 *
Yi Zou78a58242011-01-28 16:05:16 -08002015 * Called from fcoe transport
Robert Love85b4aa42008-12-09 15:10:24 -08002016 *
2017 * Returns: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08002018 */
Yi Zou78a58242011-01-28 16:05:16 -08002019static int fcoe_destroy(struct net_device *netdev)
Robert Love85b4aa42008-12-09 15:10:24 -08002020{
Robert Love619fe4b2012-05-22 19:06:10 -07002021 struct fcoe_ctlr *ctlr;
Chris Leech030f4e02009-08-25 14:00:02 -07002022 struct fcoe_interface *fcoe;
Vasu Devf04ca1b2011-04-01 16:06:45 -07002023 struct fc_lport *lport;
Neerav Parikhb2085a42011-06-20 16:59:51 -07002024 struct fcoe_port *port;
Mike Christie8eca355f2009-10-21 16:27:44 -07002025 int rc = 0;
Robert Love85b4aa42008-12-09 15:10:24 -08002026
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002027 mutex_lock(&fcoe_config_mutex);
Robert Loveee5df622011-04-01 16:05:59 -07002028 rtnl_lock();
Chris Leech2e70e242009-08-25 14:00:23 -07002029 fcoe = fcoe_hostlist_lookup_port(netdev);
2030 if (!fcoe) {
Robert Love85b4aa42008-12-09 15:10:24 -08002031 rc = -ENODEV;
Yi Zou78a58242011-01-28 16:05:16 -08002032 goto out_nodev;
Robert Love85b4aa42008-12-09 15:10:24 -08002033 }
Robert Love619fe4b2012-05-22 19:06:10 -07002034 ctlr = fcoe_to_ctlr(fcoe);
2035 lport = ctlr->lp;
Neerav Parikhb2085a42011-06-20 16:59:51 -07002036 port = lport_priv(lport);
Yi Zou54a5b212010-07-20 15:21:17 -07002037 list_del(&fcoe->list);
Neerav Parikhb2085a42011-06-20 16:59:51 -07002038 queue_work(fcoe_wq, &port->destroy_work);
Robert Love85b4aa42008-12-09 15:10:24 -08002039out_nodev:
Neerav Parikhb2085a42011-06-20 16:59:51 -07002040 rtnl_unlock();
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002041 mutex_unlock(&fcoe_config_mutex);
Robert Love85b4aa42008-12-09 15:10:24 -08002042 return rc;
2043}
2044
Robert Love1875f272009-11-03 11:47:50 -08002045/**
2046 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2047 * @work: Handle to the FCoE port to be destroyed
2048 */
Chris Leech2e70e242009-08-25 14:00:23 -07002049static void fcoe_destroy_work(struct work_struct *work)
2050{
Robert Lovef9c4358e2013-03-25 11:00:27 -07002051 struct fcoe_ctlr_device *cdev;
2052 struct fcoe_ctlr *ctlr;
Chris Leech2e70e242009-08-25 14:00:23 -07002053 struct fcoe_port *port;
Neerav Parikhb2085a42011-06-20 16:59:51 -07002054 struct fcoe_interface *fcoe;
Neerav Parikh94aa7432013-01-15 15:42:38 -08002055 struct Scsi_Host *shost;
2056 struct fc_host_attrs *fc_host;
2057 unsigned long flags;
2058 struct fc_vport *vport;
2059 struct fc_vport *next_vport;
Chris Leech2e70e242009-08-25 14:00:23 -07002060
2061 port = container_of(work, struct fcoe_port, destroy_work);
Neerav Parikh94aa7432013-01-15 15:42:38 -08002062 shost = port->lport->host;
2063 fc_host = shost_to_fc_host(shost);
2064
2065 /* Loop through all the vports and mark them for deletion */
2066 spin_lock_irqsave(shost->host_lock, flags);
2067 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2068 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2069 continue;
2070 } else {
2071 vport->flags |= FC_VPORT_DELETING;
2072 queue_work(fc_host_work_q(shost),
2073 &vport->vport_delete_work);
2074 }
2075 }
2076 spin_unlock_irqrestore(shost->host_lock, flags);
2077
2078 flush_workqueue(fc_host_work_q(shost));
2079
Chris Leech2e70e242009-08-25 14:00:23 -07002080 mutex_lock(&fcoe_config_mutex);
Neerav Parikhb2085a42011-06-20 16:59:51 -07002081
Neerav Parikhb2085a42011-06-20 16:59:51 -07002082 fcoe = port->priv;
Robert Lovef9c4358e2013-03-25 11:00:27 -07002083 ctlr = fcoe_to_ctlr(fcoe);
2084 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2085
Chris Leech2e70e242009-08-25 14:00:23 -07002086 fcoe_if_destroy(port->lport);
Robert Loveccefd232012-02-10 17:18:41 -08002087 fcoe_interface_cleanup(fcoe);
Neerav Parikhb2085a42011-06-20 16:59:51 -07002088
Chris Leech2e70e242009-08-25 14:00:23 -07002089 mutex_unlock(&fcoe_config_mutex);
Robert Lovef9c4358e2013-03-25 11:00:27 -07002090
2091 fcoe_ctlr_device_delete(cdev);
Chris Leech2e70e242009-08-25 14:00:23 -07002092}
2093
Robert Love85b4aa42008-12-09 15:10:24 -08002094/**
Yi Zou78a58242011-01-28 16:05:16 -08002095 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2096 * @netdev : The net_device object the Ethernet interface to create on
Robert Love1875f272009-11-03 11:47:50 -08002097 *
Yi Zou78a58242011-01-28 16:05:16 -08002098 * Called from fcoe transport.
2099 *
2100 * Returns: always returns true as this is the default FCoE transport,
2101 * i.e., support all netdevs.
2102 */
2103static bool fcoe_match(struct net_device *netdev)
2104{
2105 return true;
2106}
2107
2108/**
john fastabend6f6c2aa2011-11-18 13:35:56 -08002109 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2110 * @netdev: The net_device object of the L2 link that should be queried
2111 * @port: The fcoe_port to bind FCoE APP priority with
2112 * @
2113 */
2114static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2115{
2116#ifdef CONFIG_DCB
2117 int dcbx;
2118 u8 fup, up;
2119 struct net_device *netdev = fcoe->realdev;
Robert Love619fe4b2012-05-22 19:06:10 -07002120 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
john fastabend6f6c2aa2011-11-18 13:35:56 -08002121 struct dcb_app app = {
2122 .priority = 0,
2123 .protocol = ETH_P_FCOE
2124 };
2125
2126 /* setup DCB priority attributes. */
2127 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2128 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2129
2130 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2131 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2132 up = dcb_ieee_getapp_mask(netdev, &app);
2133 app.protocol = ETH_P_FIP;
2134 fup = dcb_ieee_getapp_mask(netdev, &app);
2135 } else {
2136 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2137 up = dcb_getapp(netdev, &app);
2138 app.protocol = ETH_P_FIP;
2139 fup = dcb_getapp(netdev, &app);
2140 }
2141
Neerav Parikh31c37a62012-09-24 11:52:45 -07002142 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0;
2143 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority;
john fastabend6f6c2aa2011-11-18 13:35:56 -08002144 }
2145#endif
2146}
2147
Robert Love435c8662012-11-27 06:53:35 +00002148enum fcoe_create_link_state {
2149 FCOE_CREATE_LINK_DOWN,
2150 FCOE_CREATE_LINK_UP,
2151};
2152
john fastabend6f6c2aa2011-11-18 13:35:56 -08002153/**
Robert Love435c8662012-11-27 06:53:35 +00002154 * _fcoe_create() - (internal) Create a fcoe interface
2155 * @netdev : The net_device object the Ethernet interface to create on
2156 * @fip_mode: The FIP mode for this creation
2157 * @link_state: The ctlr link state on creation
Yi Zou78a58242011-01-28 16:05:16 -08002158 *
Robert Love435c8662012-11-27 06:53:35 +00002159 * Called from either the libfcoe 'create' module parameter
2160 * via fcoe_create or from fcoe_syfs's ctlr_create file.
Robert Love85b4aa42008-12-09 15:10:24 -08002161 *
Robert Love435c8662012-11-27 06:53:35 +00002162 * libfcoe's 'create' module parameter is deprecated so some
2163 * consolidation of code can be done when that interface is
2164 * removed.
Robert Love34f42a02009-02-27 10:55:45 -08002165 */
Hannes Reinecke1917d422016-07-04 10:29:19 +02002166static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode,
Robert Love435c8662012-11-27 06:53:35 +00002167 enum fcoe_create_link_state link_state)
Robert Love85b4aa42008-12-09 15:10:24 -08002168{
Neerav Parikhb2085a42011-06-20 16:59:51 -07002169 int rc = 0;
Robert Love8d55e502012-05-22 19:06:26 -07002170 struct fcoe_ctlr_device *ctlr_dev;
Robert Love619fe4b2012-05-22 19:06:10 -07002171 struct fcoe_ctlr *ctlr;
Chris Leech030f4e02009-08-25 14:00:02 -07002172 struct fcoe_interface *fcoe;
Chris Leechaf7f85d2009-08-25 13:59:24 -07002173 struct fc_lport *lport;
Robert Love85b4aa42008-12-09 15:10:24 -08002174
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002175 mutex_lock(&fcoe_config_mutex);
Robert Loveee5df622011-04-01 16:05:59 -07002176 rtnl_lock();
Vasu Dev34ce27b2010-05-07 15:18:46 -07002177
Robert Love85b4aa42008-12-09 15:10:24 -08002178 /* look for existing lport */
2179 if (fcoe_hostlist_lookup(netdev)) {
2180 rc = -EEXIST;
Yi Zou78a58242011-01-28 16:05:16 -08002181 goto out_nodev;
Robert Love85b4aa42008-12-09 15:10:24 -08002182 }
Robert Love85b4aa42008-12-09 15:10:24 -08002183
Joe Eykholt1dd454d2010-07-20 15:20:46 -07002184 fcoe = fcoe_interface_create(netdev, fip_mode);
Robert Love7287fb92011-01-28 16:03:47 -08002185 if (IS_ERR(fcoe)) {
2186 rc = PTR_ERR(fcoe);
Yi Zou78a58242011-01-28 16:05:16 -08002187 goto out_nodev;
Chris Leech030f4e02009-08-25 14:00:02 -07002188 }
2189
Robert Love619fe4b2012-05-22 19:06:10 -07002190 ctlr = fcoe_to_ctlr(fcoe);
Robert Love8d55e502012-05-22 19:06:26 -07002191 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2192 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
Chris Leechaf7f85d2009-08-25 13:59:24 -07002193 if (IS_ERR(lport)) {
Robert Loved5488eb2009-06-10 15:30:59 -07002194 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
Robert Love85b4aa42008-12-09 15:10:24 -08002195 netdev->name);
Robert Love85b4aa42008-12-09 15:10:24 -08002196 rc = -EIO;
Robert Love848e7d52011-08-25 12:40:47 -07002197 rtnl_unlock();
Chris Leech2e70e242009-08-25 14:00:23 -07002198 fcoe_interface_cleanup(fcoe);
Robert Lovef9c4358e2013-03-25 11:00:27 -07002199 mutex_unlock(&fcoe_config_mutex);
2200 fcoe_ctlr_device_delete(ctlr_dev);
2201 goto out;
Robert Love85b4aa42008-12-09 15:10:24 -08002202 }
Chris Leech030f4e02009-08-25 14:00:02 -07002203
Chris Leech54b649f2009-08-25 14:00:07 -07002204 /* Make this the "master" N_Port */
Robert Love619fe4b2012-05-22 19:06:10 -07002205 ctlr->lp = lport;
Chris Leech030f4e02009-08-25 14:00:02 -07002206
john fastabend6f6c2aa2011-11-18 13:35:56 -08002207 /* setup DCB priority attributes. */
2208 fcoe_dcb_create(fcoe);
2209
Chris Leech54b649f2009-08-25 14:00:07 -07002210 /* start FIP Discovery and FLOGI */
2211 lport->boot_time = jiffies;
2212 fc_fabric_login(lport);
Robert Love435c8662012-11-27 06:53:35 +00002213
2214 /*
2215 * If the fcoe_ctlr_device is to be set to DISABLED
2216 * it must be done after the lport is added to the
2217 * hostlist, but before the rtnl_lock is released.
2218 * This is because the rtnl_lock protects the
2219 * hostlist that fcoe_device_notification uses. If
2220 * the FCoE Controller is intended to be created
2221 * DISABLED then 'enabled' needs to be considered
2222 * handling link events. 'enabled' must be set
2223 * before the lport can be found in the hostlist
2224 * when a link up event is received.
2225 */
2226 if (link_state == FCOE_CREATE_LINK_UP)
2227 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2228 else
2229 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2230
2231 if (link_state == FCOE_CREATE_LINK_UP &&
2232 !fcoe_link_ok(lport)) {
Robert Love22805122012-03-13 18:22:12 -07002233 rtnl_unlock();
Robert Love619fe4b2012-05-22 19:06:10 -07002234 fcoe_ctlr_link_up(ctlr);
Robert Love22805122012-03-13 18:22:12 -07002235 mutex_unlock(&fcoe_config_mutex);
2236 return rc;
2237 }
Chris Leech54b649f2009-08-25 14:00:07 -07002238
Robert Love85b4aa42008-12-09 15:10:24 -08002239out_nodev:
Vasu Dev34ce27b2010-05-07 15:18:46 -07002240 rtnl_unlock();
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002241 mutex_unlock(&fcoe_config_mutex);
Robert Lovef9c4358e2013-03-25 11:00:27 -07002242out:
Robert Love85b4aa42008-12-09 15:10:24 -08002243 return rc;
2244}
2245
Robert Love34f42a02009-02-27 10:55:45 -08002246/**
Robert Love435c8662012-11-27 06:53:35 +00002247 * fcoe_create() - Create a fcoe interface
2248 * @netdev : The net_device object the Ethernet interface to create on
2249 * @fip_mode: The FIP mode for this creation
2250 *
2251 * Called from fcoe transport
2252 *
2253 * Returns: 0 for success
2254 */
Hannes Reinecke1917d422016-07-04 10:29:19 +02002255static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode)
Robert Love435c8662012-11-27 06:53:35 +00002256{
2257 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2258}
2259
2260/**
2261 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2262 * @netdev: The net_device to be used by the allocated FCoE Controller
2263 *
2264 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2265 * in a link_down state. The allows the user an opportunity to configure
2266 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2267 *
2268 * Creating in with this routine starts the FCoE Controller in Fabric
2269 * mode. The user can change to VN2VN or another mode before enabling.
2270 */
2271static int fcoe_ctlr_alloc(struct net_device *netdev)
2272{
2273 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2274 FCOE_CREATE_LINK_DOWN);
2275}
2276
2277/**
Robert Love5e4f8fe2010-05-07 15:18:35 -07002278 * fcoe_link_ok() - Check if the link is OK for a local port
2279 * @lport: The local port to check link on
2280 *
2281 * Returns: 0 if link is UP and OK, -1 if not
2282 *
2283 */
Bart Van Assche7c9c6842012-01-13 17:26:25 -08002284static int fcoe_link_ok(struct fc_lport *lport)
Robert Love5e4f8fe2010-05-07 15:18:35 -07002285{
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08002286 struct net_device *netdev = fcoe_netdev(lport);
Robert Love5e4f8fe2010-05-07 15:18:35 -07002287
2288 if (netif_oper_up(netdev))
2289 return 0;
2290 return -1;
2291}
2292
2293/**
Robert Love1875f272009-11-03 11:47:50 -08002294 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2295 * @lport: The local port whose skbs are to be cleared
Joe Eykholte7a51992009-08-25 14:04:08 -07002296 *
2297 * Must be called with fcoe_create_mutex held to single-thread completion.
2298 *
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02002299 * This flushes the pending skbs by flush the work item for each CPU. The work
2300 * item on each possible CPU is flushed because we may have used the per-CPU
2301 * struct of an offline CPU.
Robert Love85b4aa42008-12-09 15:10:24 -08002302 */
Bart Van Assche7c9c6842012-01-13 17:26:25 -08002303static void fcoe_percpu_clean(struct fc_lport *lport)
Robert Love85b4aa42008-12-09 15:10:24 -08002304{
Robert Love85b4aa42008-12-09 15:10:24 -08002305 struct fcoe_percpu_s *pp;
Robert Love5e5e92d2009-03-17 11:41:35 -07002306 unsigned int cpu;
Robert Love85b4aa42008-12-09 15:10:24 -08002307
Robert Love5e5e92d2009-03-17 11:41:35 -07002308 for_each_possible_cpu(cpu) {
2309 pp = &per_cpu(fcoe_percpu, cpu);
Joe Eykholte7a51992009-08-25 14:04:08 -07002310
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02002311 flush_work(&pp->work);
Robert Love85b4aa42008-12-09 15:10:24 -08002312 }
2313}
Robert Love85b4aa42008-12-09 15:10:24 -08002314
2315/**
Robert Love1875f272009-11-03 11:47:50 -08002316 * fcoe_reset() - Reset a local port
2317 * @shost: The SCSI host associated with the local port to be reset
Robert Love85b4aa42008-12-09 15:10:24 -08002318 *
Robert Love1875f272009-11-03 11:47:50 -08002319 * Returns: Always 0 (return value required by FC transport template)
Robert Love85b4aa42008-12-09 15:10:24 -08002320 */
Bart Van Assche7c9c6842012-01-13 17:26:25 -08002321static int fcoe_reset(struct Scsi_Host *shost)
Robert Love85b4aa42008-12-09 15:10:24 -08002322{
2323 struct fc_lport *lport = shost_priv(shost);
Vasu Devd2f80952011-02-25 15:03:28 -08002324 struct fcoe_port *port = lport_priv(lport);
2325 struct fcoe_interface *fcoe = port->priv;
Robert Love619fe4b2012-05-22 19:06:10 -07002326 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
Robert Love435c8662012-11-27 06:53:35 +00002327 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
Vasu Devd2f80952011-02-25 15:03:28 -08002328
Robert Love619fe4b2012-05-22 19:06:10 -07002329 fcoe_ctlr_link_down(ctlr);
2330 fcoe_clean_pending_queue(ctlr->lp);
Robert Love435c8662012-11-27 06:53:35 +00002331
2332 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2333 !fcoe_link_ok(ctlr->lp))
Robert Love619fe4b2012-05-22 19:06:10 -07002334 fcoe_ctlr_link_up(ctlr);
Robert Love85b4aa42008-12-09 15:10:24 -08002335 return 0;
2336}
Robert Love85b4aa42008-12-09 15:10:24 -08002337
Robert Love34f42a02009-02-27 10:55:45 -08002338/**
Robert Love1875f272009-11-03 11:47:50 -08002339 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2340 * @netdev: The net device used as a key
Robert Love85b4aa42008-12-09 15:10:24 -08002341 *
Robert Love1875f272009-11-03 11:47:50 -08002342 * Locking: Must be called with the RNL mutex held.
2343 *
2344 * Returns: NULL or the FCoE interface
Robert Love85b4aa42008-12-09 15:10:24 -08002345 */
Chris Leech014f5c32009-08-25 13:59:30 -07002346static struct fcoe_interface *
Robert Love1875f272009-11-03 11:47:50 -08002347fcoe_hostlist_lookup_port(const struct net_device *netdev)
Robert Love85b4aa42008-12-09 15:10:24 -08002348{
Chris Leech014f5c32009-08-25 13:59:30 -07002349 struct fcoe_interface *fcoe;
Robert Love85b4aa42008-12-09 15:10:24 -08002350
Chris Leech014f5c32009-08-25 13:59:30 -07002351 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
Robert Love1875f272009-11-03 11:47:50 -08002352 if (fcoe->netdev == netdev)
Chris Leech014f5c32009-08-25 13:59:30 -07002353 return fcoe;
Robert Love85b4aa42008-12-09 15:10:24 -08002354 }
Robert Love85b4aa42008-12-09 15:10:24 -08002355 return NULL;
2356}
2357
Robert Love34f42a02009-02-27 10:55:45 -08002358/**
Robert Love1875f272009-11-03 11:47:50 -08002359 * fcoe_hostlist_lookup() - Find the local port associated with a
2360 * given net device
2361 * @netdev: The netdevice used as a key
Robert Love85b4aa42008-12-09 15:10:24 -08002362 *
Robert Love1875f272009-11-03 11:47:50 -08002363 * Locking: Must be called with the RTNL mutex held
2364 *
2365 * Returns: NULL or the local port
Robert Love85b4aa42008-12-09 15:10:24 -08002366 */
Chris Leech090eb6c2009-08-25 14:00:28 -07002367static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
Robert Love85b4aa42008-12-09 15:10:24 -08002368{
Robert Love619fe4b2012-05-22 19:06:10 -07002369 struct fcoe_ctlr *ctlr;
Chris Leech014f5c32009-08-25 13:59:30 -07002370 struct fcoe_interface *fcoe;
Robert Love85b4aa42008-12-09 15:10:24 -08002371
Chris Leech014f5c32009-08-25 13:59:30 -07002372 fcoe = fcoe_hostlist_lookup_port(netdev);
Robert Love619fe4b2012-05-22 19:06:10 -07002373 ctlr = fcoe_to_ctlr(fcoe);
2374 return (fcoe) ? ctlr->lp : NULL;
Robert Love85b4aa42008-12-09 15:10:24 -08002375}
Robert Love85b4aa42008-12-09 15:10:24 -08002376
Robert Love34f42a02009-02-27 10:55:45 -08002377/**
Robert Love1875f272009-11-03 11:47:50 -08002378 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2379 * port to the hostlist
2380 * @lport: The local port that identifies the FCoE interface to be added
2381 *
2382 * Locking: must be called with the RTNL mutex held
Robert Love85b4aa42008-12-09 15:10:24 -08002383 *
2384 * Returns: 0 for success
2385 */
Chris Leech090eb6c2009-08-25 14:00:28 -07002386static int fcoe_hostlist_add(const struct fc_lport *lport)
Robert Love85b4aa42008-12-09 15:10:24 -08002387{
Chris Leech014f5c32009-08-25 13:59:30 -07002388 struct fcoe_interface *fcoe;
2389 struct fcoe_port *port;
Robert Love85b4aa42008-12-09 15:10:24 -08002390
Chris Leech014f5c32009-08-25 13:59:30 -07002391 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2392 if (!fcoe) {
2393 port = lport_priv(lport);
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08002394 fcoe = port->priv;
Chris Leech014f5c32009-08-25 13:59:30 -07002395 list_add_tail(&fcoe->list, &fcoe_hostlist);
Robert Love85b4aa42008-12-09 15:10:24 -08002396 }
2397 return 0;
2398}
Robert Love85b4aa42008-12-09 15:10:24 -08002399
Neil Hormanf9184df2013-01-15 14:34:40 -05002400/**
2401 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2402 * port to the hostlist
2403 * @lport: The local port that identifies the FCoE interface to be added
2404 *
2405 * Locking: must be called with the RTNL mutex held
2406 *
2407 */
2408static void fcoe_hostlist_del(const struct fc_lport *lport)
2409{
2410 struct fcoe_interface *fcoe;
2411 struct fcoe_port *port;
2412
2413 port = lport_priv(lport);
2414 fcoe = port->priv;
2415 list_del(&fcoe->list);
2416 return;
2417}
Yi Zou78a58242011-01-28 16:05:16 -08002418
2419static struct fcoe_transport fcoe_sw_transport = {
2420 .name = {FCOE_TRANSPORT_DEFAULT},
2421 .attached = false,
2422 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2423 .match = fcoe_match,
Robert Love435c8662012-11-27 06:53:35 +00002424 .alloc = fcoe_ctlr_alloc,
Yi Zou78a58242011-01-28 16:05:16 -08002425 .create = fcoe_create,
2426 .destroy = fcoe_destroy,
2427 .enable = fcoe_enable,
2428 .disable = fcoe_disable,
2429};
2430
Robert Love34f42a02009-02-27 10:55:45 -08002431/**
Robert Love1875f272009-11-03 11:47:50 -08002432 * fcoe_init() - Initialize fcoe.ko
Robert Love85b4aa42008-12-09 15:10:24 -08002433 *
Robert Love1875f272009-11-03 11:47:50 -08002434 * Returns: 0 on success, or a negative value on failure
Robert Love34f42a02009-02-27 10:55:45 -08002435 */
Robert Love85b4aa42008-12-09 15:10:24 -08002436static int __init fcoe_init(void)
2437{
Robert Love1875f272009-11-03 11:47:50 -08002438 struct fcoe_percpu_s *p;
Robert Love38eccab2009-03-17 11:41:30 -07002439 unsigned int cpu;
Robert Love8976f422009-03-17 11:41:46 -07002440 int rc = 0;
Robert Love85b4aa42008-12-09 15:10:24 -08002441
Tejun Heo2ca32b42011-01-28 16:05:32 -08002442 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2443 if (!fcoe_wq)
2444 return -ENOMEM;
2445
Yi Zou78a58242011-01-28 16:05:16 -08002446 /* register as a fcoe transport */
2447 rc = fcoe_transport_attach(&fcoe_sw_transport);
2448 if (rc) {
2449 printk(KERN_ERR "failed to register an fcoe transport, check "
2450 "if libfcoe is loaded\n");
2451 return rc;
2452 }
2453
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002454 mutex_lock(&fcoe_config_mutex);
2455
Robert Love38eccab2009-03-17 11:41:30 -07002456 for_each_possible_cpu(cpu) {
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02002457 p = per_cpu_ptr(&fcoe_percpu, cpu);
2458 INIT_WORK(&p->work, fcoe_receive_work);
Robert Love38eccab2009-03-17 11:41:30 -07002459 skb_queue_head_init(&p->fcoe_rx_list);
2460 }
2461
Robert Love8976f422009-03-17 11:41:46 -07002462 /* Setup link change notification */
Robert Love85b4aa42008-12-09 15:10:24 -08002463 fcoe_dev_setup();
2464
Chris Leech5892c322009-08-25 13:59:14 -07002465 rc = fcoe_if_init();
2466 if (rc)
2467 goto out_free;
Robert Love85b4aa42008-12-09 15:10:24 -08002468
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002469 mutex_unlock(&fcoe_config_mutex);
Robert Love85b4aa42008-12-09 15:10:24 -08002470 return 0;
Robert Love8976f422009-03-17 11:41:46 -07002471
2472out_free:
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002473 mutex_unlock(&fcoe_config_mutex);
Tejun Heo2ca32b42011-01-28 16:05:32 -08002474 destroy_workqueue(fcoe_wq);
Robert Love8976f422009-03-17 11:41:46 -07002475 return rc;
Robert Love85b4aa42008-12-09 15:10:24 -08002476}
2477module_init(fcoe_init);
2478
2479/**
Robert Love1875f272009-11-03 11:47:50 -08002480 * fcoe_exit() - Clean up fcoe.ko
Robert Love85b4aa42008-12-09 15:10:24 -08002481 *
Robert Love1875f272009-11-03 11:47:50 -08002482 * Returns: 0 on success or a negative value on failure
Robert Love34f42a02009-02-27 10:55:45 -08002483 */
Robert Love85b4aa42008-12-09 15:10:24 -08002484static void __exit fcoe_exit(void)
2485{
Chris Leech014f5c32009-08-25 13:59:30 -07002486 struct fcoe_interface *fcoe, *tmp;
Robert Love619fe4b2012-05-22 19:06:10 -07002487 struct fcoe_ctlr *ctlr;
Chris Leech2e70e242009-08-25 14:00:23 -07002488 struct fcoe_port *port;
Robert Love1875f272009-11-03 11:47:50 -08002489 unsigned int cpu;
Robert Love85b4aa42008-12-09 15:10:24 -08002490
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002491 mutex_lock(&fcoe_config_mutex);
2492
Robert Love85b4aa42008-12-09 15:10:24 -08002493 fcoe_dev_cleanup();
2494
Vasu Dev5919a592009-03-27 09:03:29 -07002495 /* releases the associated fcoe hosts */
Chris Leech090eb6c2009-08-25 14:00:28 -07002496 rtnl_lock();
2497 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
Robert Love619fe4b2012-05-22 19:06:10 -07002498 ctlr = fcoe_to_ctlr(fcoe);
2499 port = lport_priv(ctlr->lp);
Neil Hormanf9184df2013-01-15 14:34:40 -05002500 fcoe_hostlist_del(port->lport);
Tejun Heo2ca32b42011-01-28 16:05:32 -08002501 queue_work(fcoe_wq, &port->destroy_work);
Chris Leechc863df32009-08-25 14:00:18 -07002502 }
Chris Leech090eb6c2009-08-25 14:00:28 -07002503 rtnl_unlock();
Robert Love85b4aa42008-12-09 15:10:24 -08002504
Sebastian Andrzej Siewior4b9bc862016-04-12 17:16:54 +02002505 for_each_possible_cpu(cpu)
2506 fcoe_thread_cleanup_local(cpu);
Srivatsa S. Bhatcd45ae32014-03-11 02:09:52 +05302507
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002508 mutex_unlock(&fcoe_config_mutex);
Chris Leech2e70e242009-08-25 14:00:23 -07002509
Tejun Heo2ca32b42011-01-28 16:05:32 -08002510 /*
2511 * destroy_work's may be chained but destroy_workqueue()
2512 * can take care of them. Just kill the fcoe_wq.
2513 */
2514 destroy_workqueue(fcoe_wq);
Chris Leech2e70e242009-08-25 14:00:23 -07002515
Tejun Heo2ca32b42011-01-28 16:05:32 -08002516 /*
2517 * Detaching from the scsi transport must happen after all
2518 * destroys are done on the fcoe_wq. destroy_workqueue will
2519 * enusre the fcoe_wq is flushed.
2520 */
Chris Leech2e70e242009-08-25 14:00:23 -07002521 fcoe_if_exit();
Yi Zou78a58242011-01-28 16:05:16 -08002522
2523 /* detach from fcoe transport */
2524 fcoe_transport_detach(&fcoe_sw_transport);
Robert Love85b4aa42008-12-09 15:10:24 -08002525}
2526module_exit(fcoe_exit);
Chris Leech11b56182009-11-03 11:46:29 -08002527
2528/**
2529 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2530 * @seq: active sequence in the FLOGI or FDISC exchange
2531 * @fp: response frame, or error encoded in a pointer (timeout)
2532 * @arg: pointer the the fcoe_ctlr structure
2533 *
Uwe Kleine-König65155b32010-06-11 12:17:01 +02002534 * This handles MAC address management for FCoE, then passes control on to
Chris Leech11b56182009-11-03 11:46:29 -08002535 * the libfc FLOGI response handler.
2536 */
2537static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2538{
2539 struct fcoe_ctlr *fip = arg;
2540 struct fc_exch *exch = fc_seq_exch(seq);
2541 struct fc_lport *lport = exch->lp;
2542 u8 *mac;
2543
2544 if (IS_ERR(fp))
2545 goto done;
2546
2547 mac = fr_cb(fp)->granted_mac;
Vasu Dev907c07d2011-10-28 11:34:23 -07002548 /* pre-FIP */
2549 if (is_zero_ether_addr(mac))
2550 fcoe_ctlr_recv_flogi(fip, lport, fp);
2551 if (!is_zero_ether_addr(mac))
2552 fcoe_update_src_mac(lport, mac);
Chris Leech11b56182009-11-03 11:46:29 -08002553done:
2554 fc_lport_flogi_resp(seq, fp, lport);
2555}
2556
2557/**
2558 * fcoe_logo_resp() - FCoE specific LOGO response handler
2559 * @seq: active sequence in the LOGO exchange
2560 * @fp: response frame, or error encoded in a pointer (timeout)
2561 * @arg: pointer the the fcoe_ctlr structure
2562 *
Uwe Kleine-König65155b32010-06-11 12:17:01 +02002563 * This handles MAC address management for FCoE, then passes control on to
Chris Leech11b56182009-11-03 11:46:29 -08002564 * the libfc LOGO response handler.
2565 */
2566static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2567{
Joe Eykholt386309ce2009-11-03 11:49:16 -08002568 struct fc_lport *lport = arg;
Chris Leech11b56182009-11-03 11:46:29 -08002569 static u8 zero_mac[ETH_ALEN] = { 0 };
2570
2571 if (!IS_ERR(fp))
Joe Eykholt386309ce2009-11-03 11:49:16 -08002572 fcoe_update_src_mac(lport, zero_mac);
Chris Leech11b56182009-11-03 11:46:29 -08002573 fc_lport_logo_resp(seq, fp, lport);
2574}
2575
2576/**
2577 * fcoe_elsct_send - FCoE specific ELS handler
2578 *
2579 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2580 * using FCoE specific response handlers and passing the FIP controller as
2581 * the argument (the lport is still available from the exchange).
2582 *
2583 * Most of the work here is just handed off to the libfc routine.
2584 */
Robert Love1875f272009-11-03 11:47:50 -08002585static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2586 struct fc_frame *fp, unsigned int op,
2587 void (*resp)(struct fc_seq *,
2588 struct fc_frame *,
2589 void *),
2590 void *arg, u32 timeout)
Chris Leech11b56182009-11-03 11:46:29 -08002591{
2592 struct fcoe_port *port = lport_priv(lport);
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08002593 struct fcoe_interface *fcoe = port->priv;
Robert Love619fe4b2012-05-22 19:06:10 -07002594 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
Chris Leech11b56182009-11-03 11:46:29 -08002595 struct fc_frame_header *fh = fc_frame_header_get(fp);
2596
2597 switch (op) {
2598 case ELS_FLOGI:
2599 case ELS_FDISC:
Joe Eykholte10f8c62010-07-20 15:20:30 -07002600 if (lport->point_to_multipoint)
2601 break;
Chris Leech11b56182009-11-03 11:46:29 -08002602 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2603 fip, timeout);
2604 case ELS_LOGO:
2605 /* only hook onto fabric logouts, not port logouts */
2606 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2607 break;
2608 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
Joe Eykholt386309ce2009-11-03 11:49:16 -08002609 lport, timeout);
Chris Leech11b56182009-11-03 11:46:29 -08002610 }
2611 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2612}
2613
Chris Leech9a057532009-11-03 11:46:40 -08002614/**
2615 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2616 * @vport: fc_vport object to create a new fc_host for
2617 * @disabled: start the new fc_host in a disabled state by default?
2618 *
2619 * Returns: 0 for success
2620 */
2621static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2622{
2623 struct Scsi_Host *shost = vport_to_shost(vport);
2624 struct fc_lport *n_port = shost_priv(shost);
2625 struct fcoe_port *port = lport_priv(n_port);
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08002626 struct fcoe_interface *fcoe = port->priv;
Chris Leech9a057532009-11-03 11:46:40 -08002627 struct net_device *netdev = fcoe->netdev;
2628 struct fc_lport *vn_port;
Neerav Parikhbdf25212011-05-16 16:45:29 -07002629 int rc;
2630 char buf[32];
2631
2632 rc = fcoe_validate_vport_create(vport);
2633 if (rc) {
Bhanu Prakash Gollapudid8348952011-08-04 17:38:49 -07002634 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
Neerav Parikhbdf25212011-05-16 16:45:29 -07002635 printk(KERN_ERR "fcoe: Failed to create vport, "
2636 "WWPN (0x%s) already exists\n",
2637 buf);
2638 return rc;
2639 }
Chris Leech9a057532009-11-03 11:46:40 -08002640
2641 mutex_lock(&fcoe_config_mutex);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +00002642 rtnl_lock();
Chris Leech9a057532009-11-03 11:46:40 -08002643 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +00002644 rtnl_unlock();
Chris Leech9a057532009-11-03 11:46:40 -08002645 mutex_unlock(&fcoe_config_mutex);
2646
2647 if (IS_ERR(vn_port)) {
2648 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2649 netdev->name);
2650 return -EIO;
2651 }
2652
2653 if (disabled) {
2654 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2655 } else {
2656 vn_port->boot_time = jiffies;
2657 fc_fabric_login(vn_port);
2658 fc_vport_setlink(vn_port);
2659 }
2660 return 0;
2661}
2662
2663/**
2664 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2665 * @vport: fc_vport object that is being destroyed
2666 *
2667 * Returns: 0 for success
2668 */
2669static int fcoe_vport_destroy(struct fc_vport *vport)
2670{
2671 struct Scsi_Host *shost = vport_to_shost(vport);
2672 struct fc_lport *n_port = shost_priv(shost);
2673 struct fc_lport *vn_port = vport->dd_data;
Chris Leech9a057532009-11-03 11:46:40 -08002674
2675 mutex_lock(&n_port->lp_mutex);
2676 list_del(&vn_port->list);
2677 mutex_unlock(&n_port->lp_mutex);
Robert Loveccefd232012-02-10 17:18:41 -08002678
2679 mutex_lock(&fcoe_config_mutex);
2680 fcoe_if_destroy(vn_port);
2681 mutex_unlock(&fcoe_config_mutex);
2682
Chris Leech9a057532009-11-03 11:46:40 -08002683 return 0;
2684}
2685
2686/**
2687 * fcoe_vport_disable() - change vport state
2688 * @vport: vport to bring online/offline
2689 * @disable: should the vport be disabled?
2690 */
2691static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2692{
2693 struct fc_lport *lport = vport->dd_data;
2694
2695 if (disable) {
2696 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2697 fc_fabric_logoff(lport);
2698 } else {
2699 lport->boot_time = jiffies;
2700 fc_fabric_login(lport);
2701 fc_vport_setlink(lport);
2702 }
2703
2704 return 0;
2705}
2706
Chris Leechdc8596d2009-11-03 11:47:18 -08002707/**
2708 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2709 * @vport: fc_vport with a new symbolic name string
2710 *
2711 * After generating a new symbolic name string, a new RSPN_ID request is
2712 * sent to the name server. There is no response handler, so if it fails
2713 * for some reason it will not be retried.
2714 */
2715static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2716{
2717 struct fc_lport *lport = vport->dd_data;
2718 struct fc_frame *fp;
2719 size_t len;
2720
2721 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2722 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2723 fcoe_netdev(lport)->name, vport->symbolic_name);
2724
2725 if (lport->state != LPORT_ST_READY)
2726 return;
2727
2728 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2729 fp = fc_frame_alloc(lport,
2730 sizeof(struct fc_ct_hdr) +
2731 sizeof(struct fc_ns_rspn) + len);
2732 if (!fp)
2733 return;
2734 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
Joe Eykholtb94f8952009-11-03 11:50:21 -08002735 NULL, NULL, 3 * lport->r_a_tov);
Chris Leechdc8596d2009-11-03 11:47:18 -08002736}
Yi Zoub84056b2009-11-20 14:55:19 -08002737
Robert Love8d55e502012-05-22 19:06:26 -07002738static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2739{
2740 struct fcoe_ctlr_device *ctlr_dev =
2741 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2742 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2743 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2744
2745 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2746}
2747
Joe Eykholt7d65b0d2010-03-12 16:08:02 -08002748/**
2749 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2750 * @lport: the local port
2751 * @port_id: the port ID
2752 * @fp: the received frame, if any, that caused the port_id to be set.
2753 *
2754 * This routine handles the case where we received a FLOGI and are
2755 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2756 * so it can set the non-mapped mode and gateway address.
2757 *
2758 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2759 */
2760static void fcoe_set_port_id(struct fc_lport *lport,
2761 u32 port_id, struct fc_frame *fp)
2762{
2763 struct fcoe_port *port = lport_priv(lport);
Bhanu Prakash Gollapudi8597ae82011-01-28 16:05:37 -08002764 struct fcoe_interface *fcoe = port->priv;
Robert Love619fe4b2012-05-22 19:06:10 -07002765 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
Joe Eykholt7d65b0d2010-03-12 16:08:02 -08002766
2767 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
Robert Love619fe4b2012-05-22 19:06:10 -07002768 fcoe_ctlr_recv_flogi(ctlr, lport, fp);
Joe Eykholt7d65b0d2010-03-12 16:08:02 -08002769}