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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>
21#include <linux/version.h>
Robert Love85b4aa42008-12-09 15:10:24 -080022#include <linux/spinlock.h>
Robert Love85b4aa42008-12-09 15:10:24 -080023#include <linux/netdevice.h>
24#include <linux/etherdevice.h>
25#include <linux/ethtool.h>
26#include <linux/if_ether.h>
27#include <linux/if_vlan.h>
Robert Love85b4aa42008-12-09 15:10:24 -080028#include <linux/crc32.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/slab.h>
Robert Love85b4aa42008-12-09 15:10:24 -080030#include <linux/cpu.h>
31#include <linux/fs.h>
32#include <linux/sysfs.h>
33#include <linux/ctype.h>
34#include <scsi/scsi_tcq.h>
35#include <scsi/scsicam.h>
36#include <scsi/scsi_transport.h>
37#include <scsi/scsi_transport_fc.h>
38#include <net/rtnetlink.h>
39
40#include <scsi/fc/fc_encaps.h>
Joe Eykholt97c83892009-03-17 11:42:40 -070041#include <scsi/fc/fc_fip.h>
Robert Love85b4aa42008-12-09 15:10:24 -080042
43#include <scsi/libfc.h>
44#include <scsi/fc_frame.h>
45#include <scsi/libfcoe.h>
Robert Love85b4aa42008-12-09 15:10:24 -080046
Vasu Devfdd78022009-03-17 11:42:24 -070047#include "fcoe.h"
48
Robert Love85b4aa42008-12-09 15:10:24 -080049MODULE_AUTHOR("Open-FCoE.org");
50MODULE_DESCRIPTION("FCoE");
Vasu Dev9b34ecf2009-03-17 11:42:13 -070051MODULE_LICENSE("GPL v2");
Robert Love85b4aa42008-12-09 15:10:24 -080052
Yi Zou05cc7392009-08-25 13:59:03 -070053/* Performance tuning parameters for fcoe */
54static unsigned int fcoe_ddp_min;
55module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
56MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
57 "Direct Data Placement (DDP).");
58
Chris Leechdfc1d0f2009-08-25 14:00:13 -070059DEFINE_MUTEX(fcoe_config_mutex);
60
Joe Eykholte7a51992009-08-25 14:04:08 -070061/* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
62static DECLARE_COMPLETION(fcoe_flush_completion);
63
Robert Love85b4aa42008-12-09 15:10:24 -080064/* fcoe host list */
Chris Leech090eb6c2009-08-25 14:00:28 -070065/* must only by accessed under the RTNL mutex */
Robert Love85b4aa42008-12-09 15:10:24 -080066LIST_HEAD(fcoe_hostlist);
Robert Love5e5e92d2009-03-17 11:41:35 -070067DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
Robert Love85b4aa42008-12-09 15:10:24 -080068
Chris Leechdd3fd722009-04-21 16:27:36 -070069/* Function Prototypes */
Robert Love1875f272009-11-03 11:47:50 -080070static int fcoe_reset(struct Scsi_Host *);
Vasu Devfdd78022009-03-17 11:42:24 -070071static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
72static int fcoe_rcv(struct sk_buff *, struct net_device *,
73 struct packet_type *, struct net_device *);
Robert Love1875f272009-11-03 11:47:50 -080074static int fcoe_percpu_receive_thread(void *);
75static void fcoe_clean_pending_queue(struct fc_lport *);
76static void fcoe_percpu_clean(struct fc_lport *);
Robert Love5e4f8fe2010-05-07 15:18:35 -070077static int fcoe_link_speed_update(struct fc_lport *);
Robert Love1875f272009-11-03 11:47:50 -080078static int fcoe_link_ok(struct fc_lport *);
Vasu Devfdd78022009-03-17 11:42:24 -070079
80static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
81static int fcoe_hostlist_add(const struct fc_lport *);
Vasu Devfdd78022009-03-17 11:42:24 -070082
Vasu Dev4bb6b512009-05-06 10:52:34 -070083static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *);
Robert Love85b4aa42008-12-09 15:10:24 -080084static int fcoe_device_notification(struct notifier_block *, ulong, void *);
85static void fcoe_dev_setup(void);
86static void fcoe_dev_cleanup(void);
Robert Love1875f272009-11-03 11:47:50 -080087static struct fcoe_interface
88*fcoe_hostlist_lookup_port(const struct net_device *);
Robert Love85b4aa42008-12-09 15:10:24 -080089
Robert Love1875f272009-11-03 11:47:50 -080090static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
91 struct packet_type *, struct net_device *);
92
93static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
94static void fcoe_update_src_mac(struct fc_lport *, u8 *);
95static u8 *fcoe_get_src_mac(struct fc_lport *);
96static void fcoe_destroy_work(struct work_struct *);
97
98static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
99 unsigned int);
100static int fcoe_ddp_done(struct fc_lport *, u16);
101
102static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
103
104static int fcoe_create(const char *, struct kernel_param *);
105static int fcoe_destroy(const char *, struct kernel_param *);
Vasu Dev55a66d32009-12-10 09:59:31 -0800106static int fcoe_enable(const char *, struct kernel_param *);
107static int fcoe_disable(const char *, struct kernel_param *);
Robert Love1875f272009-11-03 11:47:50 -0800108
Robert Love1875f272009-11-03 11:47:50 -0800109static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
110 u32 did, struct fc_frame *,
111 unsigned int op,
112 void (*resp)(struct fc_seq *,
113 struct fc_frame *,
114 void *),
115 void *, u32 timeout);
Chris Leech859b7b62009-11-20 14:54:47 -0800116static void fcoe_recv_frame(struct sk_buff *skb);
Robert Love1875f272009-11-03 11:47:50 -0800117
Yi Zoub84056b2009-11-20 14:55:19 -0800118static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
119
Vasu Dev30678172010-10-08 17:12:25 -0700120module_param_call(create, fcoe_create, NULL, (void *)FIP_MODE_FABRIC, S_IWUSR);
Robert Love1875f272009-11-03 11:47:50 -0800121__MODULE_PARM_TYPE(create, "string");
Vasu Dev55a66d32009-12-10 09:59:31 -0800122MODULE_PARM_DESC(create, " Creates fcoe instance on a ethernet interface");
Joe Eykholt1dd454d2010-07-20 15:20:46 -0700123module_param_call(create_vn2vn, fcoe_create, NULL,
124 (void *)FIP_MODE_VN2VN, S_IWUSR);
125__MODULE_PARM_TYPE(create_vn2vn, "string");
126MODULE_PARM_DESC(create_vn2vn, " Creates a VN_node to VN_node FCoE instance "
127 "on an Ethernet interface");
Robert Love1875f272009-11-03 11:47:50 -0800128module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
129__MODULE_PARM_TYPE(destroy, "string");
Vasu Dev55a66d32009-12-10 09:59:31 -0800130MODULE_PARM_DESC(destroy, " Destroys fcoe instance on a ethernet interface");
131module_param_call(enable, fcoe_enable, NULL, NULL, S_IWUSR);
132__MODULE_PARM_TYPE(enable, "string");
133MODULE_PARM_DESC(enable, " Enables fcoe on a ethernet interface.");
134module_param_call(disable, fcoe_disable, NULL, NULL, S_IWUSR);
135__MODULE_PARM_TYPE(disable, "string");
136MODULE_PARM_DESC(disable, " Disables fcoe on a ethernet interface.");
Robert Love1875f272009-11-03 11:47:50 -0800137
138/* notification function for packets from net device */
Robert Love85b4aa42008-12-09 15:10:24 -0800139static struct notifier_block fcoe_notifier = {
140 .notifier_call = fcoe_device_notification,
141};
142
Robert Love1875f272009-11-03 11:47:50 -0800143/* notification function for CPU hotplug events */
144static struct notifier_block fcoe_cpu_notifier = {
145 .notifier_call = fcoe_cpu_callback,
146};
147
Chris Leeche9084bb2009-11-03 11:46:34 -0800148static struct scsi_transport_template *fcoe_transport_template;
149static struct scsi_transport_template *fcoe_vport_transport_template;
Vasu Dev7f349142009-03-27 09:06:31 -0700150
Robert Love1875f272009-11-03 11:47:50 -0800151static int fcoe_vport_destroy(struct fc_vport *);
152static int fcoe_vport_create(struct fc_vport *, bool disabled);
153static int fcoe_vport_disable(struct fc_vport *, bool disable);
154static void fcoe_set_vport_symbolic_name(struct fc_vport *);
Joe Eykholt7d65b0d2010-03-12 16:08:02 -0800155static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
Robert Love1875f272009-11-03 11:47:50 -0800156
157static struct libfc_function_template fcoe_libfc_fcn_templ = {
158 .frame_send = fcoe_xmit,
159 .ddp_setup = fcoe_ddp_setup,
160 .ddp_done = fcoe_ddp_done,
161 .elsct_send = fcoe_elsct_send,
Yi Zoub84056b2009-11-20 14:55:19 -0800162 .get_lesb = fcoe_get_lesb,
Joe Eykholt7d65b0d2010-03-12 16:08:02 -0800163 .lport_set_port_id = fcoe_set_port_id,
Robert Love1875f272009-11-03 11:47:50 -0800164};
Chris Leech9a057532009-11-03 11:46:40 -0800165
Vasu Dev7f349142009-03-27 09:06:31 -0700166struct fc_function_template fcoe_transport_function = {
167 .show_host_node_name = 1,
168 .show_host_port_name = 1,
169 .show_host_supported_classes = 1,
170 .show_host_supported_fc4s = 1,
171 .show_host_active_fc4s = 1,
172 .show_host_maxframe_size = 1,
173
174 .show_host_port_id = 1,
175 .show_host_supported_speeds = 1,
176 .get_host_speed = fc_get_host_speed,
177 .show_host_speed = 1,
178 .show_host_port_type = 1,
179 .get_host_port_state = fc_get_host_port_state,
180 .show_host_port_state = 1,
181 .show_host_symbolic_name = 1,
182
183 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
184 .show_rport_maxframe_size = 1,
185 .show_rport_supported_classes = 1,
186
187 .show_host_fabric_name = 1,
188 .show_starget_node_name = 1,
189 .show_starget_port_name = 1,
190 .show_starget_port_id = 1,
191 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
192 .show_rport_dev_loss_tmo = 1,
193 .get_fc_host_stats = fc_get_host_stats,
194 .issue_fc_host_lip = fcoe_reset,
195
196 .terminate_rport_io = fc_rport_terminate_io,
Chris Leech9a057532009-11-03 11:46:40 -0800197
198 .vport_create = fcoe_vport_create,
199 .vport_delete = fcoe_vport_destroy,
200 .vport_disable = fcoe_vport_disable,
Chris Leechdc8596d2009-11-03 11:47:18 -0800201 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
Steve Maa51ab392009-11-03 11:47:34 -0800202
203 .bsg_request = fc_lport_bsg_request,
Vasu Dev7f349142009-03-27 09:06:31 -0700204};
205
Chris Leeche9084bb2009-11-03 11:46:34 -0800206struct fc_function_template fcoe_vport_transport_function = {
207 .show_host_node_name = 1,
208 .show_host_port_name = 1,
209 .show_host_supported_classes = 1,
210 .show_host_supported_fc4s = 1,
211 .show_host_active_fc4s = 1,
212 .show_host_maxframe_size = 1,
213
214 .show_host_port_id = 1,
215 .show_host_supported_speeds = 1,
216 .get_host_speed = fc_get_host_speed,
217 .show_host_speed = 1,
218 .show_host_port_type = 1,
219 .get_host_port_state = fc_get_host_port_state,
220 .show_host_port_state = 1,
221 .show_host_symbolic_name = 1,
222
223 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
224 .show_rport_maxframe_size = 1,
225 .show_rport_supported_classes = 1,
226
227 .show_host_fabric_name = 1,
228 .show_starget_node_name = 1,
229 .show_starget_port_name = 1,
230 .show_starget_port_id = 1,
231 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
232 .show_rport_dev_loss_tmo = 1,
233 .get_fc_host_stats = fc_get_host_stats,
234 .issue_fc_host_lip = fcoe_reset,
235
236 .terminate_rport_io = fc_rport_terminate_io,
Steve Maa51ab392009-11-03 11:47:34 -0800237
238 .bsg_request = fc_lport_bsg_request,
Chris Leeche9084bb2009-11-03 11:46:34 -0800239};
240
Vasu Dev7f349142009-03-27 09:06:31 -0700241static struct scsi_host_template fcoe_shost_template = {
242 .module = THIS_MODULE,
243 .name = "FCoE Driver",
244 .proc_name = FCOE_NAME,
245 .queuecommand = fc_queuecommand,
246 .eh_abort_handler = fc_eh_abort,
247 .eh_device_reset_handler = fc_eh_device_reset,
248 .eh_host_reset_handler = fc_eh_host_reset,
249 .slave_alloc = fc_slave_alloc,
250 .change_queue_depth = fc_change_queue_depth,
251 .change_queue_type = fc_change_queue_type,
252 .this_id = -1,
Vasu Dev14caf442009-10-15 17:46:55 -0700253 .cmd_per_lun = 3,
Vasu Dev7f349142009-03-27 09:06:31 -0700254 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
255 .use_clustering = ENABLE_CLUSTERING,
256 .sg_tablesize = SG_ALL,
257 .max_sectors = 0xffff,
258};
259
Chris Leech54b649f2009-08-25 14:00:07 -0700260/**
Robert Love1875f272009-11-03 11:47:50 -0800261 * fcoe_interface_setup() - Setup a FCoE interface
262 * @fcoe: The new FCoE interface
263 * @netdev: The net device that the fcoe interface is on
Chris Leech54b649f2009-08-25 14:00:07 -0700264 *
265 * Returns : 0 for success
Chris Leech2e70e242009-08-25 14:00:23 -0700266 * Locking: must be called with the RTNL mutex held
Chris Leech54b649f2009-08-25 14:00:07 -0700267 */
268static int fcoe_interface_setup(struct fcoe_interface *fcoe,
269 struct net_device *netdev)
270{
271 struct fcoe_ctlr *fip = &fcoe->ctlr;
272 struct netdev_hw_addr *ha;
Yi Zou5bab87e2009-11-03 11:49:43 -0800273 struct net_device *real_dev;
Chris Leech54b649f2009-08-25 14:00:07 -0700274 u8 flogi_maddr[ETH_ALEN];
Yi Zoub7a727f2009-10-21 16:28:03 -0700275 const struct net_device_ops *ops;
Chris Leech54b649f2009-08-25 14:00:07 -0700276
277 fcoe->netdev = netdev;
278
Yi Zoub7a727f2009-10-21 16:28:03 -0700279 /* Let LLD initialize for FCoE */
280 ops = netdev->netdev_ops;
281 if (ops->ndo_fcoe_enable) {
282 if (ops->ndo_fcoe_enable(netdev))
283 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
284 " specific feature for LLD.\n");
285 }
286
Chris Leech54b649f2009-08-25 14:00:07 -0700287 /* Do not support for bonding device */
288 if ((netdev->priv_flags & IFF_MASTER_ALB) ||
289 (netdev->priv_flags & IFF_SLAVE_INACTIVE) ||
290 (netdev->priv_flags & IFF_MASTER_8023AD)) {
john fastabend59d92512009-11-03 11:48:44 -0800291 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
Chris Leech54b649f2009-08-25 14:00:07 -0700292 return -EOPNOTSUPP;
293 }
294
295 /* look for SAN MAC address, if multiple SAN MACs exist, only
296 * use the first one for SPMA */
Yi Zou5bab87e2009-11-03 11:49:43 -0800297 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
298 vlan_dev_real_dev(netdev) : netdev;
Chris Leech54b649f2009-08-25 14:00:07 -0700299 rcu_read_lock();
Yi Zou5bab87e2009-11-03 11:49:43 -0800300 for_each_dev_addr(real_dev, ha) {
Chris Leech54b649f2009-08-25 14:00:07 -0700301 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
Yi Zoubf361702009-11-03 11:49:38 -0800302 (is_valid_ether_addr(ha->addr))) {
Chris Leech54b649f2009-08-25 14:00:07 -0700303 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
304 fip->spma = 1;
305 break;
306 }
307 }
308 rcu_read_unlock();
309
310 /* setup Source Mac Address */
311 if (!fip->spma)
312 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
313
314 /*
315 * Add FCoE MAC address as second unicast MAC address
316 * or enter promiscuous mode if not capable of listening
317 * for multiple unicast MACs.
318 */
Chris Leech54b649f2009-08-25 14:00:07 -0700319 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000320 dev_uc_add(netdev, flogi_maddr);
Chris Leech54b649f2009-08-25 14:00:07 -0700321 if (fip->spma)
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000322 dev_uc_add(netdev, fip->ctl_src_addr);
Joe Eykholte10f8c62010-07-20 15:20:30 -0700323 if (fip->mode == FIP_MODE_VN2VN) {
324 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
325 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
326 } else
327 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
Chris Leech54b649f2009-08-25 14:00:07 -0700328
329 /*
330 * setup the receive function from ethernet driver
331 * on the ethertype for the given device
332 */
333 fcoe->fcoe_packet_type.func = fcoe_rcv;
334 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
335 fcoe->fcoe_packet_type.dev = netdev;
336 dev_add_pack(&fcoe->fcoe_packet_type);
337
338 fcoe->fip_packet_type.func = fcoe_fip_recv;
339 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
340 fcoe->fip_packet_type.dev = netdev;
341 dev_add_pack(&fcoe->fip_packet_type);
342
343 return 0;
344}
345
Vasu Dev7f349142009-03-27 09:06:31 -0700346/**
Robert Love1875f272009-11-03 11:47:50 -0800347 * fcoe_interface_create() - Create a FCoE interface on a net device
348 * @netdev: The net device to create the FCoE interface on
Joe Eykholt1dd454d2010-07-20 15:20:46 -0700349 * @fip_mode: The mode to use for FIP
Chris Leech030f4e02009-08-25 14:00:02 -0700350 *
351 * Returns: pointer to a struct fcoe_interface or NULL on error
352 */
Joe Eykholt1dd454d2010-07-20 15:20:46 -0700353static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
354 enum fip_state fip_mode)
Chris Leech030f4e02009-08-25 14:00:02 -0700355{
356 struct fcoe_interface *fcoe;
john fastabend59d92512009-11-03 11:48:44 -0800357 int err;
Chris Leech030f4e02009-08-25 14:00:02 -0700358
359 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
360 if (!fcoe) {
361 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
362 return NULL;
363 }
364
Chris Leech2e70e242009-08-25 14:00:23 -0700365 dev_hold(netdev);
Chris Leech030f4e02009-08-25 14:00:02 -0700366 kref_init(&fcoe->kref);
Chris Leech54b649f2009-08-25 14:00:07 -0700367
368 /*
369 * Initialize FIP.
370 */
Joe Eykholt1dd454d2010-07-20 15:20:46 -0700371 fcoe_ctlr_init(&fcoe->ctlr, fip_mode);
Chris Leech54b649f2009-08-25 14:00:07 -0700372 fcoe->ctlr.send = fcoe_fip_send;
373 fcoe->ctlr.update_mac = fcoe_update_src_mac;
Chris Leech11b56182009-11-03 11:46:29 -0800374 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
Chris Leech54b649f2009-08-25 14:00:07 -0700375
john fastabend59d92512009-11-03 11:48:44 -0800376 err = fcoe_interface_setup(fcoe, netdev);
377 if (err) {
378 fcoe_ctlr_destroy(&fcoe->ctlr);
379 kfree(fcoe);
380 dev_put(netdev);
381 return NULL;
382 }
Chris Leech030f4e02009-08-25 14:00:02 -0700383
384 return fcoe;
385}
386
387/**
Robert Love1875f272009-11-03 11:47:50 -0800388 * fcoe_interface_cleanup() - Clean up a FCoE interface
389 * @fcoe: The FCoE interface to be cleaned up
Chris Leech2e70e242009-08-25 14:00:23 -0700390 *
391 * Caller must be holding the RTNL mutex
Chris Leech54b649f2009-08-25 14:00:07 -0700392 */
393void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
394{
395 struct net_device *netdev = fcoe->netdev;
396 struct fcoe_ctlr *fip = &fcoe->ctlr;
397 u8 flogi_maddr[ETH_ALEN];
Yi Zoub7a727f2009-10-21 16:28:03 -0700398 const struct net_device_ops *ops;
Chris Leech54b649f2009-08-25 14:00:07 -0700399
400 /*
401 * Don't listen for Ethernet packets anymore.
402 * synchronize_net() ensures that the packet handlers are not running
403 * on another CPU. dev_remove_pack() would do that, this calls the
404 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
405 */
406 __dev_remove_pack(&fcoe->fcoe_packet_type);
407 __dev_remove_pack(&fcoe->fip_packet_type);
408 synchronize_net();
409
Chris Leech54b649f2009-08-25 14:00:07 -0700410 /* Delete secondary MAC addresses */
Chris Leech54b649f2009-08-25 14:00:07 -0700411 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000412 dev_uc_del(netdev, flogi_maddr);
Chris Leech54b649f2009-08-25 14:00:07 -0700413 if (fip->spma)
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000414 dev_uc_del(netdev, fip->ctl_src_addr);
Joe Eykholte10f8c62010-07-20 15:20:30 -0700415 if (fip->mode == FIP_MODE_VN2VN) {
416 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
417 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
418 } else
419 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
Yi Zoub7a727f2009-10-21 16:28:03 -0700420
421 /* Tell the LLD we are done w/ FCoE */
422 ops = netdev->netdev_ops;
423 if (ops->ndo_fcoe_disable) {
424 if (ops->ndo_fcoe_disable(netdev))
425 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
426 " specific feature for LLD.\n");
427 }
Chris Leech54b649f2009-08-25 14:00:07 -0700428}
429
430/**
Chris Leech030f4e02009-08-25 14:00:02 -0700431 * fcoe_interface_release() - fcoe_port kref release function
Robert Love1875f272009-11-03 11:47:50 -0800432 * @kref: Embedded reference count in an fcoe_interface struct
Chris Leech030f4e02009-08-25 14:00:02 -0700433 */
434static void fcoe_interface_release(struct kref *kref)
435{
436 struct fcoe_interface *fcoe;
Chris Leech2e70e242009-08-25 14:00:23 -0700437 struct net_device *netdev;
Chris Leech030f4e02009-08-25 14:00:02 -0700438
439 fcoe = container_of(kref, struct fcoe_interface, kref);
Chris Leech2e70e242009-08-25 14:00:23 -0700440 netdev = fcoe->netdev;
441 /* tear-down the FCoE controller */
442 fcoe_ctlr_destroy(&fcoe->ctlr);
Chris Leech030f4e02009-08-25 14:00:02 -0700443 kfree(fcoe);
Chris Leech2e70e242009-08-25 14:00:23 -0700444 dev_put(netdev);
Chris Leech030f4e02009-08-25 14:00:02 -0700445}
446
447/**
Robert Love1875f272009-11-03 11:47:50 -0800448 * fcoe_interface_get() - Get a reference to a FCoE interface
449 * @fcoe: The FCoE interface to be held
Chris Leech030f4e02009-08-25 14:00:02 -0700450 */
451static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
452{
453 kref_get(&fcoe->kref);
454}
455
456/**
Robert Love1875f272009-11-03 11:47:50 -0800457 * fcoe_interface_put() - Put a reference to a FCoE interface
458 * @fcoe: The FCoE interface to be released
Chris Leech030f4e02009-08-25 14:00:02 -0700459 */
460static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
461{
462 kref_put(&fcoe->kref, fcoe_interface_release);
463}
464
465/**
Robert Love1875f272009-11-03 11:47:50 -0800466 * fcoe_fip_recv() - Handler for received FIP frames
467 * @skb: The receive skb
468 * @netdev: The associated net device
469 * @ptype: The packet_type structure which was used to register this handler
470 * @orig_dev: The original net_device the the skb was received on.
471 * (in case dev is a bond)
Vasu Devab6b85c2009-05-17 12:33:08 +0000472 *
473 * Returns: 0 for success
474 */
Robert Love1875f272009-11-03 11:47:50 -0800475static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
Vasu Devab6b85c2009-05-17 12:33:08 +0000476 struct packet_type *ptype,
477 struct net_device *orig_dev)
478{
Chris Leech259ad852009-08-25 13:59:41 -0700479 struct fcoe_interface *fcoe;
Vasu Devab6b85c2009-05-17 12:33:08 +0000480
Chris Leech259ad852009-08-25 13:59:41 -0700481 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
Chris Leech3fe9a0b2009-08-25 13:59:46 -0700482 fcoe_ctlr_recv(&fcoe->ctlr, skb);
Vasu Devab6b85c2009-05-17 12:33:08 +0000483 return 0;
484}
485
486/**
Robert Love1875f272009-11-03 11:47:50 -0800487 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
488 * @fip: The FCoE controller
489 * @skb: The FIP packet to be sent
Vasu Devab6b85c2009-05-17 12:33:08 +0000490 */
491static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
492{
Chris Leech3fe9a0b2009-08-25 13:59:46 -0700493 skb->dev = fcoe_from_ctlr(fip)->netdev;
Vasu Devab6b85c2009-05-17 12:33:08 +0000494 dev_queue_xmit(skb);
495}
496
497/**
Robert Love1875f272009-11-03 11:47:50 -0800498 * fcoe_update_src_mac() - Update the Ethernet MAC filters
499 * @lport: The local port to update the source MAC on
500 * @addr: Unicast MAC address to add
Vasu Devab6b85c2009-05-17 12:33:08 +0000501 *
502 * Remove any previously-set unicast MAC filter.
503 * Add secondary FCoE MAC address filter for our OUI.
504 */
Chris Leech11b56182009-11-03 11:46:29 -0800505static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
Vasu Devab6b85c2009-05-17 12:33:08 +0000506{
Chris Leech11b56182009-11-03 11:46:29 -0800507 struct fcoe_port *port = lport_priv(lport);
508 struct fcoe_interface *fcoe = port->fcoe;
Vasu Devab6b85c2009-05-17 12:33:08 +0000509
Vasu Devab6b85c2009-05-17 12:33:08 +0000510 rtnl_lock();
Chris Leech11b56182009-11-03 11:46:29 -0800511 if (!is_zero_ether_addr(port->data_src_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000512 dev_uc_del(fcoe->netdev, port->data_src_addr);
Chris Leech11b56182009-11-03 11:46:29 -0800513 if (!is_zero_ether_addr(addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000514 dev_uc_add(fcoe->netdev, addr);
Chris Leech11b56182009-11-03 11:46:29 -0800515 memcpy(port->data_src_addr, addr, ETH_ALEN);
Vasu Devab6b85c2009-05-17 12:33:08 +0000516 rtnl_unlock();
517}
518
519/**
Chris Leech11b56182009-11-03 11:46:29 -0800520 * fcoe_get_src_mac() - return the Ethernet source address for an lport
521 * @lport: libfc lport
522 */
523static u8 *fcoe_get_src_mac(struct fc_lport *lport)
524{
525 struct fcoe_port *port = lport_priv(lport);
526
527 return port->data_src_addr;
528}
529
530/**
Robert Love1875f272009-11-03 11:47:50 -0800531 * fcoe_lport_config() - Set up a local port
532 * @lport: The local port to be setup
Vasu Dev7f349142009-03-27 09:06:31 -0700533 *
534 * Returns: 0 for success
535 */
Robert Love1875f272009-11-03 11:47:50 -0800536static int fcoe_lport_config(struct fc_lport *lport)
Vasu Dev7f349142009-03-27 09:06:31 -0700537{
Robert Love1875f272009-11-03 11:47:50 -0800538 lport->link_up = 0;
539 lport->qfull = 0;
540 lport->max_retry_count = 3;
541 lport->max_rport_retry_count = 3;
542 lport->e_d_tov = 2 * 1000; /* FC-FS default */
543 lport->r_a_tov = 2 * 2 * 1000;
544 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
545 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
546 lport->does_npiv = 1;
Vasu Dev7f349142009-03-27 09:06:31 -0700547
Robert Love1875f272009-11-03 11:47:50 -0800548 fc_lport_init_stats(lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700549
550 /* lport fc_lport related configuration */
Robert Love1875f272009-11-03 11:47:50 -0800551 fc_lport_config(lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700552
553 /* offload related configuration */
Robert Love1875f272009-11-03 11:47:50 -0800554 lport->crc_offload = 0;
555 lport->seq_offload = 0;
556 lport->lro_enabled = 0;
557 lport->lro_xid = 0;
558 lport->lso_max = 0;
Vasu Dev7f349142009-03-27 09:06:31 -0700559
560 return 0;
561}
562
563/**
Robert Love1875f272009-11-03 11:47:50 -0800564 * fcoe_queue_timer() - The fcoe queue timer
565 * @lport: The local port
Vasu Dev1047f222009-05-06 10:52:40 -0700566 *
567 * Calls fcoe_check_wait_queue on timeout
Vasu Dev1047f222009-05-06 10:52:40 -0700568 */
Robert Love1875f272009-11-03 11:47:50 -0800569static void fcoe_queue_timer(ulong lport)
Vasu Dev1047f222009-05-06 10:52:40 -0700570{
Robert Love1875f272009-11-03 11:47:50 -0800571 fcoe_check_wait_queue((struct fc_lport *)lport, NULL);
Vasu Dev1047f222009-05-06 10:52:40 -0700572}
573
574/**
Yi Zoudcece412009-11-20 15:22:21 -0800575 * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
576 * @netdev: the associated net device
577 * @wwn: the output WWN
578 * @type: the type of WWN (WWPN or WWNN)
579 *
580 * Returns: 0 for success
581 */
582static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
583{
584 const struct net_device_ops *ops = netdev->netdev_ops;
585
586 if (ops->ndo_fcoe_get_wwn)
587 return ops->ndo_fcoe_get_wwn(netdev, wwn, type);
588 return -EINVAL;
589}
590
591/**
Yi Zou54a5b212010-07-20 15:21:17 -0700592 * fcoe_netdev_features_change - Updates the lport's offload flags based
593 * on the LLD netdev's FCoE feature flags
594 */
595static void fcoe_netdev_features_change(struct fc_lport *lport,
596 struct net_device *netdev)
597{
598 mutex_lock(&lport->lp_mutex);
599
600 if (netdev->features & NETIF_F_SG)
601 lport->sg_supp = 1;
602 else
603 lport->sg_supp = 0;
604
605 if (netdev->features & NETIF_F_FCOE_CRC) {
606 lport->crc_offload = 1;
607 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
608 } else {
609 lport->crc_offload = 0;
610 }
611
612 if (netdev->features & NETIF_F_FSO) {
613 lport->seq_offload = 1;
614 lport->lso_max = netdev->gso_max_size;
615 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
616 lport->lso_max);
617 } else {
618 lport->seq_offload = 0;
619 lport->lso_max = 0;
620 }
621
622 if (netdev->fcoe_ddp_xid) {
623 lport->lro_enabled = 1;
624 lport->lro_xid = netdev->fcoe_ddp_xid;
625 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
626 lport->lro_xid);
627 } else {
628 lport->lro_enabled = 0;
629 lport->lro_xid = 0;
630 }
631
632 mutex_unlock(&lport->lp_mutex);
633}
634
635/**
Robert Love1875f272009-11-03 11:47:50 -0800636 * fcoe_netdev_config() - Set up net devive for SW FCoE
637 * @lport: The local port that is associated with the net device
638 * @netdev: The associated net device
Vasu Dev7f349142009-03-27 09:06:31 -0700639 *
Robert Love1875f272009-11-03 11:47:50 -0800640 * Must be called after fcoe_lport_config() as it will use local port mutex
Vasu Dev7f349142009-03-27 09:06:31 -0700641 *
Robert Love1875f272009-11-03 11:47:50 -0800642 * Returns: 0 for success
Vasu Dev7f349142009-03-27 09:06:31 -0700643 */
Robert Love1875f272009-11-03 11:47:50 -0800644static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
Vasu Dev7f349142009-03-27 09:06:31 -0700645{
646 u32 mfs;
647 u64 wwnn, wwpn;
Chris Leech25024982009-08-25 13:59:35 -0700648 struct fcoe_interface *fcoe;
Chris Leech014f5c32009-08-25 13:59:30 -0700649 struct fcoe_port *port;
Vasu Dev7f349142009-03-27 09:06:31 -0700650
651 /* Setup lport private data to point to fcoe softc */
Robert Love1875f272009-11-03 11:47:50 -0800652 port = lport_priv(lport);
Chris Leech25024982009-08-25 13:59:35 -0700653 fcoe = port->fcoe;
Vasu Dev7f349142009-03-27 09:06:31 -0700654
655 /*
656 * Determine max frame size based on underlying device and optional
657 * user-configured limit. If the MFS is too low, fcoe_link_ok()
658 * will return 0, so do this first.
659 */
Yi Zou7221d7e2009-10-21 16:27:52 -0700660 mfs = netdev->mtu;
661 if (netdev->features & NETIF_F_FCOE_MTU) {
662 mfs = FCOE_MTU;
663 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
664 }
665 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
Robert Love1875f272009-11-03 11:47:50 -0800666 if (fc_set_mfs(lport, mfs))
Vasu Dev7f349142009-03-27 09:06:31 -0700667 return -EINVAL;
668
Vasu Dev7f349142009-03-27 09:06:31 -0700669 /* offload features support */
Yi Zou54a5b212010-07-20 15:21:17 -0700670 fcoe_netdev_features_change(lport, netdev);
Vasu Dev7f349142009-03-27 09:06:31 -0700671
Chris Leech014f5c32009-08-25 13:59:30 -0700672 skb_queue_head_init(&port->fcoe_pending_queue);
673 port->fcoe_pending_queue_active = 0;
Robert Love1875f272009-11-03 11:47:50 -0800674 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700675
Robert Love5e4f8fe2010-05-07 15:18:35 -0700676 fcoe_link_speed_update(lport);
677
Robert Love1875f272009-11-03 11:47:50 -0800678 if (!lport->vport) {
Yi Zoudcece412009-11-20 15:22:21 -0800679 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
680 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
Robert Love1875f272009-11-03 11:47:50 -0800681 fc_set_wwnn(lport, wwnn);
Yi Zoudcece412009-11-20 15:22:21 -0800682 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
683 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr,
Vasu Devcf4aebca2010-07-20 15:21:22 -0700684 2, 0);
Robert Love1875f272009-11-03 11:47:50 -0800685 fc_set_wwpn(lport, wwpn);
Chris Leech9a057532009-11-03 11:46:40 -0800686 }
Vasu Dev7f349142009-03-27 09:06:31 -0700687
Vasu Dev7f349142009-03-27 09:06:31 -0700688 return 0;
689}
690
691/**
Robert Love1875f272009-11-03 11:47:50 -0800692 * fcoe_shost_config() - Set up the SCSI host associated with a local port
693 * @lport: The local port
Robert Love1875f272009-11-03 11:47:50 -0800694 * @dev: The device associated with the SCSI host
Vasu Dev7f349142009-03-27 09:06:31 -0700695 *
696 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
697 *
Robert Love1875f272009-11-03 11:47:50 -0800698 * Returns: 0 for success
Vasu Dev7f349142009-03-27 09:06:31 -0700699 */
Vasu Dev8ba00a42010-04-09 14:22:54 -0700700static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
Vasu Dev7f349142009-03-27 09:06:31 -0700701{
702 int rc = 0;
703
704 /* lport scsi host config */
Robert Love1875f272009-11-03 11:47:50 -0800705 lport->host->max_lun = FCOE_MAX_LUN;
706 lport->host->max_id = FCOE_MAX_FCP_TARGET;
707 lport->host->max_channel = 0;
Vasu Devda87bfa2010-04-09 14:22:59 -0700708 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
709
Robert Love1875f272009-11-03 11:47:50 -0800710 if (lport->vport)
711 lport->host->transportt = fcoe_vport_transport_template;
Chris Leeche9084bb2009-11-03 11:46:34 -0800712 else
Robert Love1875f272009-11-03 11:47:50 -0800713 lport->host->transportt = fcoe_transport_template;
Vasu Dev7f349142009-03-27 09:06:31 -0700714
715 /* add the new host to the SCSI-ml */
Robert Love1875f272009-11-03 11:47:50 -0800716 rc = scsi_add_host(lport->host, dev);
Vasu Dev7f349142009-03-27 09:06:31 -0700717 if (rc) {
Robert Love1875f272009-11-03 11:47:50 -0800718 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
Robert Loved5488eb2009-06-10 15:30:59 -0700719 "error on scsi_add_host\n");
Vasu Dev7f349142009-03-27 09:06:31 -0700720 return rc;
721 }
Chris Leech9a057532009-11-03 11:46:40 -0800722
Robert Love1875f272009-11-03 11:47:50 -0800723 if (!lport->vport)
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700724 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
Chris Leech9a057532009-11-03 11:46:40 -0800725
Robert Love1875f272009-11-03 11:47:50 -0800726 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
Chris Leech5baa17c2009-11-03 11:46:56 -0800727 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
Robert Love1875f272009-11-03 11:47:50 -0800728 fcoe_netdev(lport)->name);
Vasu Dev7f349142009-03-27 09:06:31 -0700729
730 return 0;
731}
732
Robert Love1875f272009-11-03 11:47:50 -0800733/**
734 * fcoe_oem_match() - The match routine for the offloaded exchange manager
735 * @fp: The I/O frame
Vasu Devd7179682009-07-29 17:05:21 -0700736 *
Robert Love1875f272009-11-03 11:47:50 -0800737 * This routine will be associated with an exchange manager (EM). When
738 * the libfc exchange handling code is looking for an EM to use it will
739 * call this routine and pass it the frame that it wishes to send. This
740 * routine will return True if the associated EM is to be used and False
741 * if the echange code should continue looking for an EM.
742 *
743 * The offload EM that this routine is associated with will handle any
744 * packets that are for SCSI read requests.
745 *
746 * Returns: True for read types I/O, otherwise returns false.
Vasu Devd7179682009-07-29 17:05:21 -0700747 */
748bool fcoe_oem_match(struct fc_frame *fp)
749{
Yi Zou05cc7392009-08-25 13:59:03 -0700750 return fc_fcp_is_read(fr_fsp(fp)) &&
751 (fr_fsp(fp)->data_len > fcoe_ddp_min);
Vasu Devd7179682009-07-29 17:05:21 -0700752}
753
Vasu Dev7f349142009-03-27 09:06:31 -0700754/**
Robert Love1875f272009-11-03 11:47:50 -0800755 * fcoe_em_config() - Allocate and configure an exchange manager
756 * @lport: The local port that the new EM will be associated with
Vasu Dev7f349142009-03-27 09:06:31 -0700757 *
Robert Love1875f272009-11-03 11:47:50 -0800758 * Returns: 0 on success
Vasu Dev7f349142009-03-27 09:06:31 -0700759 */
Robert Love1875f272009-11-03 11:47:50 -0800760static inline int fcoe_em_config(struct fc_lport *lport)
Vasu Dev7f349142009-03-27 09:06:31 -0700761{
Robert Love1875f272009-11-03 11:47:50 -0800762 struct fcoe_port *port = lport_priv(lport);
Chris Leech25024982009-08-25 13:59:35 -0700763 struct fcoe_interface *fcoe = port->fcoe;
764 struct fcoe_interface *oldfcoe = NULL;
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700765 struct net_device *old_real_dev, *cur_real_dev;
Vasu Devd7179682009-07-29 17:05:21 -0700766 u16 min_xid = FCOE_MIN_XID;
767 u16 max_xid = FCOE_MAX_XID;
768
769 /*
770 * Check if need to allocate an em instance for
771 * offload exchange ids to be shared across all VN_PORTs/lport.
772 */
Robert Love1875f272009-11-03 11:47:50 -0800773 if (!lport->lro_enabled || !lport->lro_xid ||
774 (lport->lro_xid >= max_xid)) {
775 lport->lro_xid = 0;
Vasu Devd7179682009-07-29 17:05:21 -0700776 goto skip_oem;
777 }
778
779 /*
780 * Reuse existing offload em instance in case
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700781 * it is already allocated on real eth device
Vasu Devd7179682009-07-29 17:05:21 -0700782 */
Chris Leech25024982009-08-25 13:59:35 -0700783 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
784 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700785 else
Chris Leech25024982009-08-25 13:59:35 -0700786 cur_real_dev = fcoe->netdev;
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700787
Chris Leech25024982009-08-25 13:59:35 -0700788 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
Chris Leech25024982009-08-25 13:59:35 -0700789 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
790 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700791 else
Chris Leech25024982009-08-25 13:59:35 -0700792 old_real_dev = oldfcoe->netdev;
Vasu Dev1d1b88d2009-07-29 17:05:45 -0700793
794 if (cur_real_dev == old_real_dev) {
Chris Leech991cbb62009-08-25 13:59:51 -0700795 fcoe->oem = oldfcoe->oem;
Vasu Devd7179682009-07-29 17:05:21 -0700796 break;
797 }
798 }
799
Chris Leech991cbb62009-08-25 13:59:51 -0700800 if (fcoe->oem) {
Robert Love1875f272009-11-03 11:47:50 -0800801 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
Vasu Devd7179682009-07-29 17:05:21 -0700802 printk(KERN_ERR "fcoe_em_config: failed to add "
803 "offload em:%p on interface:%s\n",
Chris Leech991cbb62009-08-25 13:59:51 -0700804 fcoe->oem, fcoe->netdev->name);
Vasu Devd7179682009-07-29 17:05:21 -0700805 return -ENOMEM;
806 }
807 } else {
Robert Love1875f272009-11-03 11:47:50 -0800808 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
809 FCOE_MIN_XID, lport->lro_xid,
810 fcoe_oem_match);
Chris Leech991cbb62009-08-25 13:59:51 -0700811 if (!fcoe->oem) {
Vasu Devd7179682009-07-29 17:05:21 -0700812 printk(KERN_ERR "fcoe_em_config: failed to allocate "
813 "em for offload exches on interface:%s\n",
Chris Leech25024982009-08-25 13:59:35 -0700814 fcoe->netdev->name);
Vasu Devd7179682009-07-29 17:05:21 -0700815 return -ENOMEM;
816 }
817 }
818
819 /*
820 * Exclude offload EM xid range from next EM xid range.
821 */
Robert Love1875f272009-11-03 11:47:50 -0800822 min_xid += lport->lro_xid + 1;
Vasu Devd7179682009-07-29 17:05:21 -0700823
824skip_oem:
Robert Love1875f272009-11-03 11:47:50 -0800825 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
Vasu Devd7179682009-07-29 17:05:21 -0700826 printk(KERN_ERR "fcoe_em_config: failed to "
Chris Leech25024982009-08-25 13:59:35 -0700827 "allocate em on interface %s\n", fcoe->netdev->name);
Vasu Dev7f349142009-03-27 09:06:31 -0700828 return -ENOMEM;
Vasu Devd7179682009-07-29 17:05:21 -0700829 }
Vasu Dev7f349142009-03-27 09:06:31 -0700830
831 return 0;
832}
833
834/**
Robert Love1875f272009-11-03 11:47:50 -0800835 * fcoe_if_destroy() - Tear down a SW FCoE instance
836 * @lport: The local port to be destroyed
Vasu Dev34ce27b2010-05-07 15:18:46 -0700837 *
838 * Locking: must be called with the RTNL mutex held and RTNL mutex
839 * needed to be dropped by this function since not dropping RTNL
840 * would cause circular locking warning on synchronous fip worker
841 * cancelling thru fcoe_interface_put invoked by this function.
842 *
Vasu Dev7f349142009-03-27 09:06:31 -0700843 */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700844static void fcoe_if_destroy(struct fc_lport *lport)
Vasu Dev7f349142009-03-27 09:06:31 -0700845{
Chris Leech014f5c32009-08-25 13:59:30 -0700846 struct fcoe_port *port = lport_priv(lport);
847 struct fcoe_interface *fcoe = port->fcoe;
Chris Leech25024982009-08-25 13:59:35 -0700848 struct net_device *netdev = fcoe->netdev;
Vasu Dev7f349142009-03-27 09:06:31 -0700849
Robert Loved5488eb2009-06-10 15:30:59 -0700850 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
Vasu Dev7f349142009-03-27 09:06:31 -0700851
Vasu Dev7f349142009-03-27 09:06:31 -0700852 /* Logout of the fabric */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700853 fc_fabric_logoff(lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700854
Vasu Dev7f349142009-03-27 09:06:31 -0700855 /* Cleanup the fc_lport */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700856 fc_lport_destroy(lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700857
Chris Leech54b649f2009-08-25 14:00:07 -0700858 /* Stop the transmit retry timer */
859 del_timer_sync(&port->timer);
860
861 /* Free existing transmit skbs */
862 fcoe_clean_pending_queue(lport);
863
Chris Leech11b56182009-11-03 11:46:29 -0800864 if (!is_zero_ether_addr(port->data_src_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000865 dev_uc_del(netdev, port->data_src_addr);
Chris Leech11b56182009-11-03 11:46:29 -0800866 rtnl_unlock();
867
Chris Leech54b649f2009-08-25 14:00:07 -0700868 /* receives may not be stopped until after this */
869 fcoe_interface_put(fcoe);
870
871 /* Free queued packets for the per-CPU receive threads */
872 fcoe_percpu_clean(lport);
873
Vasu Dev7f349142009-03-27 09:06:31 -0700874 /* Detach from the scsi-ml */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700875 fc_remove_host(lport->host);
876 scsi_remove_host(lport->host);
Vasu Dev7f349142009-03-27 09:06:31 -0700877
Yi Zou80e736f2010-11-30 16:18:07 -0800878 /* Destroy lport scsi_priv */
879 fc_fcp_destroy(lport);
880
Vasu Dev7f349142009-03-27 09:06:31 -0700881 /* There are no more rports or I/O, free the EM */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700882 fc_exch_mgr_free(lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700883
Vasu Dev7f349142009-03-27 09:06:31 -0700884 /* Free memory used by statistical counters */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700885 fc_lport_free_stats(lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700886
Chris Leech2e70e242009-08-25 14:00:23 -0700887 /* Release the Scsi_Host */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700888 scsi_host_put(lport->host);
Vasu Dev15af9742010-05-07 15:19:03 -0700889 module_put(THIS_MODULE);
Vasu Dev7f349142009-03-27 09:06:31 -0700890}
891
Robert Love1875f272009-11-03 11:47:50 -0800892/**
893 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
894 * @lport: The local port to setup DDP for
895 * @xid: The exchange ID for this DDP transfer
896 * @sgl: The scatterlist describing this transfer
897 * @sgc: The number of sg items
Vasu Dev7f349142009-03-27 09:06:31 -0700898 *
Robert Love1875f272009-11-03 11:47:50 -0800899 * Returns: 0 if the DDP context was not configured
Vasu Dev7f349142009-03-27 09:06:31 -0700900 */
Robert Love1875f272009-11-03 11:47:50 -0800901static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
902 struct scatterlist *sgl, unsigned int sgc)
Vasu Dev7f349142009-03-27 09:06:31 -0700903{
Robert Love1875f272009-11-03 11:47:50 -0800904 struct net_device *netdev = fcoe_netdev(lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700905
Robert Love1875f272009-11-03 11:47:50 -0800906 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
907 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
908 xid, sgl,
909 sgc);
Vasu Dev7f349142009-03-27 09:06:31 -0700910
911 return 0;
912}
913
Vasu Dev7f349142009-03-27 09:06:31 -0700914/**
Robert Love1875f272009-11-03 11:47:50 -0800915 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
916 * @lport: The local port to complete DDP on
917 * @xid: The exchange ID for this DDP transfer
Vasu Dev7f349142009-03-27 09:06:31 -0700918 *
Robert Love1875f272009-11-03 11:47:50 -0800919 * Returns: the length of data that have been completed by DDP
920 */
921static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
922{
923 struct net_device *netdev = fcoe_netdev(lport);
924
925 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
926 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
927 return 0;
928}
929
930/**
931 * fcoe_if_create() - Create a FCoE instance on an interface
932 * @fcoe: The FCoE interface to create a local port on
933 * @parent: The device pointer to be the parent in sysfs for the SCSI host
934 * @npiv: Indicates if the port is a vport or not
Vasu Dev7f349142009-03-27 09:06:31 -0700935 *
Robert Love1875f272009-11-03 11:47:50 -0800936 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
937 *
938 * Returns: The allocated fc_lport or an error pointer
Vasu Dev7f349142009-03-27 09:06:31 -0700939 */
Chris Leech030f4e02009-08-25 14:00:02 -0700940static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
Chris Leech9a057532009-11-03 11:46:40 -0800941 struct device *parent, int npiv)
Vasu Dev7f349142009-03-27 09:06:31 -0700942{
Robert Love1875f272009-11-03 11:47:50 -0800943 struct net_device *netdev = fcoe->netdev;
Chris Leechaf7f85d2009-08-25 13:59:24 -0700944 struct fc_lport *lport = NULL;
Chris Leech014f5c32009-08-25 13:59:30 -0700945 struct fcoe_port *port;
Robert Love1875f272009-11-03 11:47:50 -0800946 int rc;
Chris Leech9a057532009-11-03 11:46:40 -0800947 /*
948 * parent is only a vport if npiv is 1,
949 * but we'll only use vport in that case so go ahead and set it
950 */
951 struct fc_vport *vport = dev_to_vport(parent);
Vasu Dev7f349142009-03-27 09:06:31 -0700952
Robert Loved5488eb2009-06-10 15:30:59 -0700953 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
Vasu Dev7f349142009-03-27 09:06:31 -0700954
Chris Leech9a057532009-11-03 11:46:40 -0800955 if (!npiv) {
956 lport = libfc_host_alloc(&fcoe_shost_template,
957 sizeof(struct fcoe_port));
958 } else {
959 lport = libfc_vport_create(vport,
960 sizeof(struct fcoe_port));
961 }
Chris Leech86221962009-11-03 11:46:08 -0800962 if (!lport) {
Chris Leech014f5c32009-08-25 13:59:30 -0700963 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
964 rc = -ENOMEM;
Chris Leech030f4e02009-08-25 14:00:02 -0700965 goto out;
Chris Leech014f5c32009-08-25 13:59:30 -0700966 }
Chris Leech014f5c32009-08-25 13:59:30 -0700967 port = lport_priv(lport);
Chris Leech2e70e242009-08-25 14:00:23 -0700968 port->lport = lport;
Chris Leech014f5c32009-08-25 13:59:30 -0700969 port->fcoe = fcoe;
Chris Leech2e70e242009-08-25 14:00:23 -0700970 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
Vasu Dev7f349142009-03-27 09:06:31 -0700971
Robert Love1875f272009-11-03 11:47:50 -0800972 /* configure a fc_lport including the exchange manager */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700973 rc = fcoe_lport_config(lport);
Vasu Dev7f349142009-03-27 09:06:31 -0700974 if (rc) {
Robert Loved5488eb2009-06-10 15:30:59 -0700975 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
976 "interface\n");
Vasu Dev7f349142009-03-27 09:06:31 -0700977 goto out_host_put;
978 }
979
Chris Leech9a057532009-11-03 11:46:40 -0800980 if (npiv) {
Chris Leech9f8f3aa2010-04-09 14:23:16 -0700981 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
982 "%16.16llx %16.16llx\n",
Robert Love1875f272009-11-03 11:47:50 -0800983 vport->node_name, vport->port_name);
Chris Leech9a057532009-11-03 11:46:40 -0800984 fc_set_wwnn(lport, vport->node_name);
985 fc_set_wwpn(lport, vport->port_name);
986 }
987
Vasu Devab6b85c2009-05-17 12:33:08 +0000988 /* configure lport network properties */
Chris Leechaf7f85d2009-08-25 13:59:24 -0700989 rc = fcoe_netdev_config(lport, netdev);
Vasu Devab6b85c2009-05-17 12:33:08 +0000990 if (rc) {
Robert Loved5488eb2009-06-10 15:30:59 -0700991 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
992 "interface\n");
Chris Leech54b649f2009-08-25 14:00:07 -0700993 goto out_lp_destroy;
Vasu Devab6b85c2009-05-17 12:33:08 +0000994 }
Joe Eykholt97c83892009-03-17 11:42:40 -0700995
Vasu Dev7f349142009-03-27 09:06:31 -0700996 /* configure lport scsi host properties */
Vasu Dev8ba00a42010-04-09 14:22:54 -0700997 rc = fcoe_shost_config(lport, parent);
Vasu Dev7f349142009-03-27 09:06:31 -0700998 if (rc) {
Robert Loved5488eb2009-06-10 15:30:59 -0700999 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1000 "interface\n");
Chris Leech54b649f2009-08-25 14:00:07 -07001001 goto out_lp_destroy;
Vasu Dev7f349142009-03-27 09:06:31 -07001002 }
1003
Vasu Dev7f349142009-03-27 09:06:31 -07001004 /* Initialize the library */
Joe Eykholte10f8c62010-07-20 15:20:30 -07001005 rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1);
Vasu Dev7f349142009-03-27 09:06:31 -07001006 if (rc) {
Robert Loved5488eb2009-06-10 15:30:59 -07001007 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1008 "interface\n");
Vasu Dev7f349142009-03-27 09:06:31 -07001009 goto out_lp_destroy;
1010 }
1011
Chris Leech9a057532009-11-03 11:46:40 -08001012 if (!npiv) {
1013 /*
1014 * fcoe_em_alloc() and fcoe_hostlist_add() both
1015 * need to be atomic with respect to other changes to the
1016 * hostlist since fcoe_em_alloc() looks for an existing EM
1017 * instance on host list updated by fcoe_hostlist_add().
1018 *
1019 * This is currently handled through the fcoe_config_mutex
1020 * begin held.
1021 */
Chris Leechc863df32009-08-25 14:00:18 -07001022
Chris Leech9a057532009-11-03 11:46:40 -08001023 /* lport exch manager allocation */
1024 rc = fcoe_em_config(lport);
1025 if (rc) {
1026 FCOE_NETDEV_DBG(netdev, "Could not configure the EM "
Robert Love1875f272009-11-03 11:47:50 -08001027 "for the interface\n");
Chris Leech9a057532009-11-03 11:46:40 -08001028 goto out_lp_destroy;
1029 }
Vasu Dev96316092009-07-29 17:05:00 -07001030 }
1031
Chris Leech030f4e02009-08-25 14:00:02 -07001032 fcoe_interface_get(fcoe);
Chris Leechaf7f85d2009-08-25 13:59:24 -07001033 return lport;
Vasu Dev7f349142009-03-27 09:06:31 -07001034
1035out_lp_destroy:
Chris Leechaf7f85d2009-08-25 13:59:24 -07001036 fc_exch_mgr_free(lport);
Vasu Dev7f349142009-03-27 09:06:31 -07001037out_host_put:
Chris Leechaf7f85d2009-08-25 13:59:24 -07001038 scsi_host_put(lport->host);
1039out:
1040 return ERR_PTR(rc);
Vasu Dev7f349142009-03-27 09:06:31 -07001041}
1042
1043/**
Robert Love1875f272009-11-03 11:47:50 -08001044 * fcoe_if_init() - Initialization routine for fcoe.ko
Vasu Dev7f349142009-03-27 09:06:31 -07001045 *
Robert Love1875f272009-11-03 11:47:50 -08001046 * Attaches the SW FCoE transport to the FC transport
1047 *
1048 * Returns: 0 on success
Vasu Dev7f349142009-03-27 09:06:31 -07001049 */
1050static int __init fcoe_if_init(void)
1051{
1052 /* attach to scsi transport */
Chris Leeche9084bb2009-11-03 11:46:34 -08001053 fcoe_transport_template = fc_attach_transport(&fcoe_transport_function);
1054 fcoe_vport_transport_template =
1055 fc_attach_transport(&fcoe_vport_transport_function);
Vasu Dev7f349142009-03-27 09:06:31 -07001056
Chris Leeche9084bb2009-11-03 11:46:34 -08001057 if (!fcoe_transport_template) {
Robert Loved5488eb2009-06-10 15:30:59 -07001058 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
Vasu Dev7f349142009-03-27 09:06:31 -07001059 return -ENODEV;
1060 }
1061
1062 return 0;
1063}
1064
1065/**
Robert Love1875f272009-11-03 11:47:50 -08001066 * fcoe_if_exit() - Tear down fcoe.ko
Vasu Dev7f349142009-03-27 09:06:31 -07001067 *
Robert Love1875f272009-11-03 11:47:50 -08001068 * Detaches the SW FCoE transport from the FC transport
1069 *
1070 * Returns: 0 on success
Vasu Dev7f349142009-03-27 09:06:31 -07001071 */
1072int __exit fcoe_if_exit(void)
1073{
Chris Leeche9084bb2009-11-03 11:46:34 -08001074 fc_release_transport(fcoe_transport_template);
1075 fc_release_transport(fcoe_vport_transport_template);
1076 fcoe_transport_template = NULL;
1077 fcoe_vport_transport_template = NULL;
Vasu Dev7f349142009-03-27 09:06:31 -07001078 return 0;
1079}
1080
Robert Love85b4aa42008-12-09 15:10:24 -08001081/**
Robert Love1875f272009-11-03 11:47:50 -08001082 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1083 * @cpu: The CPU index of the CPU to create a receive thread for
Robert Love8976f422009-03-17 11:41:46 -07001084 */
1085static void fcoe_percpu_thread_create(unsigned int cpu)
1086{
1087 struct fcoe_percpu_s *p;
1088 struct task_struct *thread;
1089
1090 p = &per_cpu(fcoe_percpu, cpu);
1091
1092 thread = kthread_create(fcoe_percpu_receive_thread,
1093 (void *)p, "fcoethread/%d", cpu);
1094
Joe Eykholte7a51992009-08-25 14:04:08 -07001095 if (likely(!IS_ERR(thread))) {
Robert Love8976f422009-03-17 11:41:46 -07001096 kthread_bind(thread, cpu);
1097 wake_up_process(thread);
1098
1099 spin_lock_bh(&p->fcoe_rx_list.lock);
1100 p->thread = thread;
1101 spin_unlock_bh(&p->fcoe_rx_list.lock);
1102 }
1103}
1104
1105/**
Robert Love1875f272009-11-03 11:47:50 -08001106 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1107 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
Robert Love8976f422009-03-17 11:41:46 -07001108 *
1109 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1110 * current CPU's Rx thread. If the thread being destroyed is bound to
1111 * the CPU processing this context the skbs will be freed.
1112 */
1113static void fcoe_percpu_thread_destroy(unsigned int cpu)
1114{
1115 struct fcoe_percpu_s *p;
1116 struct task_struct *thread;
1117 struct page *crc_eof;
1118 struct sk_buff *skb;
1119#ifdef CONFIG_SMP
1120 struct fcoe_percpu_s *p0;
Joe Eykholtf018b732010-03-12 16:08:55 -08001121 unsigned targ_cpu = get_cpu();
Robert Love8976f422009-03-17 11:41:46 -07001122#endif /* CONFIG_SMP */
1123
Robert Loved5488eb2009-06-10 15:30:59 -07001124 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
Robert Love8976f422009-03-17 11:41:46 -07001125
1126 /* Prevent any new skbs from being queued for this CPU. */
1127 p = &per_cpu(fcoe_percpu, cpu);
1128 spin_lock_bh(&p->fcoe_rx_list.lock);
1129 thread = p->thread;
1130 p->thread = NULL;
1131 crc_eof = p->crc_eof_page;
1132 p->crc_eof_page = NULL;
1133 p->crc_eof_offset = 0;
1134 spin_unlock_bh(&p->fcoe_rx_list.lock);
1135
1136#ifdef CONFIG_SMP
1137 /*
1138 * Don't bother moving the skb's if this context is running
1139 * on the same CPU that is having its thread destroyed. This
1140 * can easily happen when the module is removed.
1141 */
1142 if (cpu != targ_cpu) {
1143 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1144 spin_lock_bh(&p0->fcoe_rx_list.lock);
1145 if (p0->thread) {
Robert Loved5488eb2009-06-10 15:30:59 -07001146 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1147 cpu, targ_cpu);
Robert Love8976f422009-03-17 11:41:46 -07001148
1149 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1150 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1151 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1152 } else {
1153 /*
1154 * The targeted CPU is not initialized and cannot accept
Robert Love1875f272009-11-03 11:47:50 -08001155 * new skbs. Unlock the targeted CPU and drop the skbs
Robert Love8976f422009-03-17 11:41:46 -07001156 * on the CPU that is going offline.
1157 */
1158 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1159 kfree_skb(skb);
1160 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1161 }
1162 } else {
1163 /*
1164 * This scenario occurs when the module is being removed
1165 * and all threads are being destroyed. skbs will continue
1166 * to be shifted from the CPU thread that is being removed
1167 * to the CPU thread associated with the CPU that is processing
1168 * the module removal. Once there is only one CPU Rx thread it
1169 * will reach this case and we will drop all skbs and later
1170 * stop the thread.
1171 */
1172 spin_lock_bh(&p->fcoe_rx_list.lock);
1173 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1174 kfree_skb(skb);
1175 spin_unlock_bh(&p->fcoe_rx_list.lock);
1176 }
Joe Eykholtf018b732010-03-12 16:08:55 -08001177 put_cpu();
Robert Love8976f422009-03-17 11:41:46 -07001178#else
1179 /*
Chris Leechdd3fd722009-04-21 16:27:36 -07001180 * This a non-SMP scenario where the singular Rx thread is
Robert Love8976f422009-03-17 11:41:46 -07001181 * being removed. Free all skbs and stop the thread.
1182 */
1183 spin_lock_bh(&p->fcoe_rx_list.lock);
1184 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1185 kfree_skb(skb);
1186 spin_unlock_bh(&p->fcoe_rx_list.lock);
1187#endif
1188
1189 if (thread)
1190 kthread_stop(thread);
1191
1192 if (crc_eof)
1193 put_page(crc_eof);
1194}
1195
1196/**
Robert Love1875f272009-11-03 11:47:50 -08001197 * fcoe_cpu_callback() - Handler for CPU hotplug events
1198 * @nfb: The callback data block
1199 * @action: The event triggering the callback
1200 * @hcpu: The index of the CPU that the event is for
Robert Love8976f422009-03-17 11:41:46 -07001201 *
Robert Love1875f272009-11-03 11:47:50 -08001202 * This creates or destroys per-CPU data for fcoe
Robert Love8976f422009-03-17 11:41:46 -07001203 *
1204 * Returns NOTIFY_OK always.
1205 */
1206static int fcoe_cpu_callback(struct notifier_block *nfb,
1207 unsigned long action, void *hcpu)
1208{
1209 unsigned cpu = (unsigned long)hcpu;
1210
1211 switch (action) {
1212 case CPU_ONLINE:
1213 case CPU_ONLINE_FROZEN:
Robert Loved5488eb2009-06-10 15:30:59 -07001214 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
Robert Love8976f422009-03-17 11:41:46 -07001215 fcoe_percpu_thread_create(cpu);
1216 break;
1217 case CPU_DEAD:
1218 case CPU_DEAD_FROZEN:
Robert Loved5488eb2009-06-10 15:30:59 -07001219 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
Robert Love8976f422009-03-17 11:41:46 -07001220 fcoe_percpu_thread_destroy(cpu);
1221 break;
1222 default:
1223 break;
1224 }
1225 return NOTIFY_OK;
1226}
1227
Robert Love8976f422009-03-17 11:41:46 -07001228/**
Robert Love1875f272009-11-03 11:47:50 -08001229 * fcoe_rcv() - Receive packets from a net device
1230 * @skb: The received packet
1231 * @netdev: The net device that the packet was received on
1232 * @ptype: The packet type context
1233 * @olddev: The last device net device
Robert Love85b4aa42008-12-09 15:10:24 -08001234 *
Robert Love1875f272009-11-03 11:47:50 -08001235 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1236 * FC frame and passes the frame to libfc.
Robert Love85b4aa42008-12-09 15:10:24 -08001237 *
1238 * Returns: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08001239 */
Robert Love1875f272009-11-03 11:47:50 -08001240int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
Robert Love85b4aa42008-12-09 15:10:24 -08001241 struct packet_type *ptype, struct net_device *olddev)
1242{
Robert Love1875f272009-11-03 11:47:50 -08001243 struct fc_lport *lport;
Robert Love85b4aa42008-12-09 15:10:24 -08001244 struct fcoe_rcv_info *fr;
Chris Leech259ad852009-08-25 13:59:41 -07001245 struct fcoe_interface *fcoe;
Robert Love85b4aa42008-12-09 15:10:24 -08001246 struct fc_frame_header *fh;
Robert Love85b4aa42008-12-09 15:10:24 -08001247 struct fcoe_percpu_s *fps;
Vasu Dev519e5132010-07-20 15:19:32 -07001248 struct ethhdr *eh;
Vasu Devb2f00912009-08-25 13:58:53 -07001249 unsigned int cpu;
Robert Love85b4aa42008-12-09 15:10:24 -08001250
Chris Leech259ad852009-08-25 13:59:41 -07001251 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
Robert Love1875f272009-11-03 11:47:50 -08001252 lport = fcoe->ctlr.lp;
1253 if (unlikely(!lport)) {
1254 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
Robert Love85b4aa42008-12-09 15:10:24 -08001255 goto err2;
1256 }
Robert Love1875f272009-11-03 11:47:50 -08001257 if (!lport->link_up)
Joe Eykholt97c83892009-03-17 11:42:40 -07001258 goto err2;
Robert Love85b4aa42008-12-09 15:10:24 -08001259
Robert Love1875f272009-11-03 11:47:50 -08001260 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
Robert Loved5488eb2009-06-10 15:30:59 -07001261 "data:%p tail:%p end:%p sum:%d dev:%s",
1262 skb->len, skb->data_len, skb->head, skb->data,
1263 skb_tail_pointer(skb), skb_end_pointer(skb),
1264 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
Robert Love85b4aa42008-12-09 15:10:24 -08001265
Vasu Dev519e5132010-07-20 15:19:32 -07001266 eh = eth_hdr(skb);
Vasu Dev519e5132010-07-20 15:19:32 -07001267
1268 if (is_fip_mode(&fcoe->ctlr) &&
1269 compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) {
1270 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1271 eh->h_source);
Robert Love85b4aa42008-12-09 15:10:24 -08001272 goto err;
1273 }
1274
1275 /*
1276 * Check for minimum frame length, and make sure required FCoE
1277 * and FC headers are pulled into the linear data area.
1278 */
1279 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
Robert Love1875f272009-11-03 11:47:50 -08001280 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
Robert Love85b4aa42008-12-09 15:10:24 -08001281 goto err;
1282
1283 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1284 fh = (struct fc_frame_header *) skb_transport_header(skb);
1285
Robert Love0ee31cb2010-10-08 17:12:46 -07001286 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1287 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1288 eh->h_dest);
1289 goto err;
1290 }
1291
Robert Love85b4aa42008-12-09 15:10:24 -08001292 fr = fcoe_dev_from_skb(skb);
Robert Love1875f272009-11-03 11:47:50 -08001293 fr->fr_dev = lport;
Robert Love85b4aa42008-12-09 15:10:24 -08001294 fr->ptype = ptype;
Robert Love5e5e92d2009-03-17 11:41:35 -07001295
Robert Love85b4aa42008-12-09 15:10:24 -08001296 /*
Vasu Devb2f00912009-08-25 13:58:53 -07001297 * In case the incoming frame's exchange is originated from
1298 * the initiator, then received frame's exchange id is ANDed
1299 * with fc_cpu_mask bits to get the same cpu on which exchange
1300 * was originated, otherwise just use the current cpu.
Robert Love85b4aa42008-12-09 15:10:24 -08001301 */
Vasu Devb2f00912009-08-25 13:58:53 -07001302 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1303 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1304 else
1305 cpu = smp_processor_id();
Robert Love5e5e92d2009-03-17 11:41:35 -07001306
Robert Love8976f422009-03-17 11:41:46 -07001307 fps = &per_cpu(fcoe_percpu, cpu);
Robert Love85b4aa42008-12-09 15:10:24 -08001308 spin_lock_bh(&fps->fcoe_rx_list.lock);
Robert Love8976f422009-03-17 11:41:46 -07001309 if (unlikely(!fps->thread)) {
1310 /*
1311 * The targeted CPU is not ready, let's target
1312 * the first CPU now. For non-SMP systems this
1313 * will check the same CPU twice.
1314 */
Robert Love1875f272009-11-03 11:47:50 -08001315 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
Robert Loved5488eb2009-06-10 15:30:59 -07001316 "ready for incoming skb- using first online "
1317 "CPU.\n");
Robert Love8976f422009-03-17 11:41:46 -07001318
1319 spin_unlock_bh(&fps->fcoe_rx_list.lock);
Rusty Russell69571772009-12-17 11:43:14 -06001320 cpu = cpumask_first(cpu_online_mask);
Robert Love8976f422009-03-17 11:41:46 -07001321 fps = &per_cpu(fcoe_percpu, cpu);
1322 spin_lock_bh(&fps->fcoe_rx_list.lock);
1323 if (!fps->thread) {
1324 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1325 goto err;
1326 }
1327 }
1328
1329 /*
1330 * We now have a valid CPU that we're targeting for
1331 * this skb. We also have this receive thread locked,
1332 * so we're free to queue skbs into it's queue.
1333 */
Robert Love85b4aa42008-12-09 15:10:24 -08001334
Chris Leech859b7b62009-11-20 14:54:47 -08001335 /* If this is a SCSI-FCP frame, and this is already executing on the
1336 * correct CPU, and the queue for this CPU is empty, then go ahead
1337 * and process the frame directly in the softirq context.
1338 * This lets us process completions without context switching from the
1339 * NET_RX softirq, to our receive processing thread, and then back to
1340 * BLOCK softirq context.
1341 */
1342 if (fh->fh_type == FC_TYPE_FCP &&
1343 cpu == smp_processor_id() &&
1344 skb_queue_empty(&fps->fcoe_rx_list)) {
1345 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1346 fcoe_recv_frame(skb);
1347 } else {
1348 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1349 if (fps->fcoe_rx_list.qlen == 1)
1350 wake_up_process(fps->thread);
1351 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1352 }
Robert Love85b4aa42008-12-09 15:10:24 -08001353
1354 return 0;
1355err:
Joe Eykholtf018b732010-03-12 16:08:55 -08001356 per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++;
1357 put_cpu();
Robert Love85b4aa42008-12-09 15:10:24 -08001358err2:
1359 kfree_skb(skb);
1360 return -1;
1361}
Robert Love85b4aa42008-12-09 15:10:24 -08001362
1363/**
Robert Love1875f272009-11-03 11:47:50 -08001364 * fcoe_start_io() - Start FCoE I/O
1365 * @skb: The packet to be transmitted
1366 *
1367 * This routine is called from the net device to start transmitting
1368 * FCoE packets.
Robert Love85b4aa42008-12-09 15:10:24 -08001369 *
1370 * Returns: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08001371 */
Robert Love85b4aa42008-12-09 15:10:24 -08001372static inline int fcoe_start_io(struct sk_buff *skb)
1373{
Chris Leech18fa11e2009-11-03 11:50:05 -08001374 struct sk_buff *nskb;
Robert Love85b4aa42008-12-09 15:10:24 -08001375 int rc;
1376
Chris Leech18fa11e2009-11-03 11:50:05 -08001377 nskb = skb_clone(skb, GFP_ATOMIC);
1378 rc = dev_queue_xmit(nskb);
Robert Love85b4aa42008-12-09 15:10:24 -08001379 if (rc != 0)
1380 return rc;
1381 kfree_skb(skb);
1382 return 0;
1383}
1384
1385/**
Robert Love1875f272009-11-03 11:47:50 -08001386 * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1387 * @skb: The packet to be transmitted
1388 * @tlen: The total length of the trailer
1389 *
1390 * This routine allocates a page for frame trailers. The page is re-used if
1391 * there is enough room left on it for the current trailer. If there isn't
1392 * enough buffer left a new page is allocated for the trailer. Reference to
1393 * the page from this function as well as the skbs using the page fragments
1394 * ensure that the page is freed at the appropriate time.
Robert Love85b4aa42008-12-09 15:10:24 -08001395 *
1396 * Returns: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08001397 */
Robert Love85b4aa42008-12-09 15:10:24 -08001398static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
1399{
1400 struct fcoe_percpu_s *fps;
1401 struct page *page;
Robert Love85b4aa42008-12-09 15:10:24 -08001402
Robert Love5e5e92d2009-03-17 11:41:35 -07001403 fps = &get_cpu_var(fcoe_percpu);
Robert Love85b4aa42008-12-09 15:10:24 -08001404 page = fps->crc_eof_page;
1405 if (!page) {
1406 page = alloc_page(GFP_ATOMIC);
1407 if (!page) {
Robert Love5e5e92d2009-03-17 11:41:35 -07001408 put_cpu_var(fcoe_percpu);
Robert Love85b4aa42008-12-09 15:10:24 -08001409 return -ENOMEM;
1410 }
1411 fps->crc_eof_page = page;
Robert Love8976f422009-03-17 11:41:46 -07001412 fps->crc_eof_offset = 0;
Robert Love85b4aa42008-12-09 15:10:24 -08001413 }
1414
1415 get_page(page);
1416 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
1417 fps->crc_eof_offset, tlen);
1418 skb->len += tlen;
1419 skb->data_len += tlen;
1420 skb->truesize += tlen;
1421 fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
1422
1423 if (fps->crc_eof_offset >= PAGE_SIZE) {
1424 fps->crc_eof_page = NULL;
1425 fps->crc_eof_offset = 0;
1426 put_page(page);
1427 }
Robert Love5e5e92d2009-03-17 11:41:35 -07001428 put_cpu_var(fcoe_percpu);
Robert Love85b4aa42008-12-09 15:10:24 -08001429 return 0;
1430}
1431
1432/**
Robert Love1875f272009-11-03 11:47:50 -08001433 * fcoe_fc_crc() - Calculates the CRC for a given frame
1434 * @fp: The frame to be checksumed
Robert Love85b4aa42008-12-09 15:10:24 -08001435 *
Robert Love1875f272009-11-03 11:47:50 -08001436 * This uses crc32() routine to calculate the CRC for a frame
1437 *
1438 * Return: The 32 bit CRC value
Robert Love34f42a02009-02-27 10:55:45 -08001439 */
Robert Love85b4aa42008-12-09 15:10:24 -08001440u32 fcoe_fc_crc(struct fc_frame *fp)
1441{
1442 struct sk_buff *skb = fp_skb(fp);
1443 struct skb_frag_struct *frag;
1444 unsigned char *data;
1445 unsigned long off, len, clen;
1446 u32 crc;
1447 unsigned i;
1448
1449 crc = crc32(~0, skb->data, skb_headlen(skb));
1450
1451 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1452 frag = &skb_shinfo(skb)->frags[i];
1453 off = frag->page_offset;
1454 len = frag->size;
1455 while (len > 0) {
1456 clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
1457 data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
1458 KM_SKB_DATA_SOFTIRQ);
1459 crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
1460 kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
1461 off += clen;
1462 len -= clen;
1463 }
1464 }
1465 return crc;
1466}
Robert Love85b4aa42008-12-09 15:10:24 -08001467
1468/**
Robert Love1875f272009-11-03 11:47:50 -08001469 * fcoe_xmit() - Transmit a FCoE frame
1470 * @lport: The local port that the frame is to be transmitted for
1471 * @fp: The frame to be transmitted
Robert Love85b4aa42008-12-09 15:10:24 -08001472 *
Robert Love1875f272009-11-03 11:47:50 -08001473 * Return: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08001474 */
Robert Love1875f272009-11-03 11:47:50 -08001475int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
Robert Love85b4aa42008-12-09 15:10:24 -08001476{
Vasu Dev4bb6b512009-05-06 10:52:34 -07001477 int wlen;
Robert Love85b4aa42008-12-09 15:10:24 -08001478 u32 crc;
1479 struct ethhdr *eh;
1480 struct fcoe_crc_eof *cp;
1481 struct sk_buff *skb;
1482 struct fcoe_dev_stats *stats;
1483 struct fc_frame_header *fh;
1484 unsigned int hlen; /* header length implies the version */
1485 unsigned int tlen; /* trailer length */
1486 unsigned int elen; /* eth header, may include vlan */
Robert Love1875f272009-11-03 11:47:50 -08001487 struct fcoe_port *port = lport_priv(lport);
Chris Leech3fe9a0b2009-08-25 13:59:46 -07001488 struct fcoe_interface *fcoe = port->fcoe;
Robert Love85b4aa42008-12-09 15:10:24 -08001489 u8 sof, eof;
1490 struct fcoe_hdr *hp;
1491
1492 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1493
Robert Love85b4aa42008-12-09 15:10:24 -08001494 fh = fc_frame_header_get(fp);
Joe Eykholt97c83892009-03-17 11:42:40 -07001495 skb = fp_skb(fp);
1496 wlen = skb->len / FCOE_WORD_TO_BYTE;
1497
Robert Love1875f272009-11-03 11:47:50 -08001498 if (!lport->link_up) {
Dan Carpenter3caf02e2009-04-21 16:27:25 -07001499 kfree_skb(skb);
Joe Eykholt97c83892009-03-17 11:42:40 -07001500 return 0;
Robert Love85b4aa42008-12-09 15:10:24 -08001501 }
1502
Joe Eykholt9860eeb2010-03-12 16:07:52 -08001503 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
Robert Love1875f272009-11-03 11:47:50 -08001504 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
Joe Eykholt97c83892009-03-17 11:42:40 -07001505 return 0;
1506
Robert Love85b4aa42008-12-09 15:10:24 -08001507 sof = fr_sof(fp);
1508 eof = fr_eof(fp);
1509
Vasu Dev4e57e1c2009-05-06 10:52:46 -07001510 elen = sizeof(struct ethhdr);
Robert Love85b4aa42008-12-09 15:10:24 -08001511 hlen = sizeof(struct fcoe_hdr);
1512 tlen = sizeof(struct fcoe_crc_eof);
1513 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1514
1515 /* crc offload */
Robert Love1875f272009-11-03 11:47:50 -08001516 if (likely(lport->crc_offload)) {
Yi Zou39ca9a02009-02-27 14:07:15 -08001517 skb->ip_summed = CHECKSUM_PARTIAL;
Robert Love85b4aa42008-12-09 15:10:24 -08001518 skb->csum_start = skb_headroom(skb);
1519 skb->csum_offset = skb->len;
1520 crc = 0;
1521 } else {
1522 skb->ip_summed = CHECKSUM_NONE;
1523 crc = fcoe_fc_crc(fp);
1524 }
1525
Chris Leech014f5c32009-08-25 13:59:30 -07001526 /* copy port crc and eof to the skb buff */
Robert Love85b4aa42008-12-09 15:10:24 -08001527 if (skb_is_nonlinear(skb)) {
1528 skb_frag_t *frag;
1529 if (fcoe_get_paged_crc_eof(skb, tlen)) {
Roel Kluine9041582009-02-27 10:56:22 -08001530 kfree_skb(skb);
Robert Love85b4aa42008-12-09 15:10:24 -08001531 return -ENOMEM;
1532 }
1533 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1534 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1535 + frag->page_offset;
1536 } else {
1537 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1538 }
1539
1540 memset(cp, 0, sizeof(*cp));
1541 cp->fcoe_eof = eof;
1542 cp->fcoe_crc32 = cpu_to_le32(~crc);
1543
1544 if (skb_is_nonlinear(skb)) {
1545 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1546 cp = NULL;
1547 }
1548
Chris Leech014f5c32009-08-25 13:59:30 -07001549 /* adjust skb network/transport offsets to match mac/fcoe/port */
Robert Love85b4aa42008-12-09 15:10:24 -08001550 skb_push(skb, elen + hlen);
1551 skb_reset_mac_header(skb);
1552 skb_reset_network_header(skb);
1553 skb->mac_len = elen;
Yi Zou211c7382009-02-27 14:06:37 -08001554 skb->protocol = htons(ETH_P_FCOE);
Chris Leech3fe9a0b2009-08-25 13:59:46 -07001555 skb->dev = fcoe->netdev;
Robert Love85b4aa42008-12-09 15:10:24 -08001556
1557 /* fill up mac and fcoe headers */
1558 eh = eth_hdr(skb);
1559 eh->h_proto = htons(ETH_P_FCOE);
Joe Eykholtcd229e42010-07-20 15:20:40 -07001560 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
Chris Leech3fe9a0b2009-08-25 13:59:46 -07001561 if (fcoe->ctlr.map_dest)
Joe Eykholtcd229e42010-07-20 15:20:40 -07001562 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
Robert Love85b4aa42008-12-09 15:10:24 -08001563
Chris Leech3fe9a0b2009-08-25 13:59:46 -07001564 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1565 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
Robert Love85b4aa42008-12-09 15:10:24 -08001566 else
Chris Leech11b56182009-11-03 11:46:29 -08001567 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
Robert Love85b4aa42008-12-09 15:10:24 -08001568
1569 hp = (struct fcoe_hdr *)(eh + 1);
1570 memset(hp, 0, sizeof(*hp));
1571 if (FC_FCOE_VER)
1572 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1573 hp->fcoe_sof = sof;
1574
Yi Zou39ca9a02009-02-27 14:07:15 -08001575 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
Robert Love1875f272009-11-03 11:47:50 -08001576 if (lport->seq_offload && fr_max_payload(fp)) {
Yi Zou39ca9a02009-02-27 14:07:15 -08001577 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1578 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1579 } else {
1580 skb_shinfo(skb)->gso_type = 0;
1581 skb_shinfo(skb)->gso_size = 0;
1582 }
Robert Love85b4aa42008-12-09 15:10:24 -08001583 /* update tx stats: regardless if LLD fails */
Joe Eykholtf018b732010-03-12 16:08:55 -08001584 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
Robert Love582b45b2009-03-31 15:51:50 -07001585 stats->TxFrames++;
1586 stats->TxWords += wlen;
Joe Eykholtf018b732010-03-12 16:08:55 -08001587 put_cpu();
Robert Love85b4aa42008-12-09 15:10:24 -08001588
1589 /* send down to lld */
Robert Love1875f272009-11-03 11:47:50 -08001590 fr_dev(fp) = lport;
Chris Leech014f5c32009-08-25 13:59:30 -07001591 if (port->fcoe_pending_queue.qlen)
Robert Love1875f272009-11-03 11:47:50 -08001592 fcoe_check_wait_queue(lport, skb);
Vasu Dev4bb6b512009-05-06 10:52:34 -07001593 else if (fcoe_start_io(skb))
Robert Love1875f272009-11-03 11:47:50 -08001594 fcoe_check_wait_queue(lport, skb);
Robert Love85b4aa42008-12-09 15:10:24 -08001595
1596 return 0;
1597}
Robert Love85b4aa42008-12-09 15:10:24 -08001598
Robert Love34f42a02009-02-27 10:55:45 -08001599/**
Robert Love1875f272009-11-03 11:47:50 -08001600 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1601 * @skb: The completed skb (argument required by destructor)
Joe Eykholte7a51992009-08-25 14:04:08 -07001602 */
1603static void fcoe_percpu_flush_done(struct sk_buff *skb)
1604{
1605 complete(&fcoe_flush_completion);
1606}
1607
1608/**
Chris Leech859b7b62009-11-20 14:54:47 -08001609 * fcoe_recv_frame() - process a single received frame
1610 * @skb: frame to process
1611 */
1612static void fcoe_recv_frame(struct sk_buff *skb)
1613{
1614 u32 fr_len;
1615 struct fc_lport *lport;
1616 struct fcoe_rcv_info *fr;
1617 struct fcoe_dev_stats *stats;
1618 struct fc_frame_header *fh;
1619 struct fcoe_crc_eof crc_eof;
1620 struct fc_frame *fp;
Chris Leech859b7b62009-11-20 14:54:47 -08001621 struct fcoe_port *port;
1622 struct fcoe_hdr *hp;
1623
1624 fr = fcoe_dev_from_skb(skb);
1625 lport = fr->fr_dev;
1626 if (unlikely(!lport)) {
1627 if (skb->destructor != fcoe_percpu_flush_done)
1628 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1629 kfree_skb(skb);
1630 return;
1631 }
1632
1633 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1634 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1635 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);
1641 if (skb_is_nonlinear(skb))
1642 skb_linearize(skb); /* not ideal */
Chris Leech859b7b62009-11-20 14:54:47 -08001643
1644 /*
1645 * Frame length checks and setting up the header pointers
1646 * was done in fcoe_rcv already.
1647 */
1648 hp = (struct fcoe_hdr *) skb_network_header(skb);
1649 fh = (struct fc_frame_header *) skb_transport_header(skb);
1650
Joe Eykholtf018b732010-03-12 16:08:55 -08001651 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
Chris Leech859b7b62009-11-20 14:54:47 -08001652 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1653 if (stats->ErrorFrames < 5)
1654 printk(KERN_WARNING "fcoe: FCoE version "
1655 "mismatch: The frame has "
1656 "version %x, but the "
1657 "initiator supports version "
1658 "%x\n", FC_FCOE_DECAPS_VER(hp),
1659 FC_FCOE_VER);
Joe Eykholtf018b732010-03-12 16:08:55 -08001660 goto drop;
Chris Leech859b7b62009-11-20 14:54:47 -08001661 }
1662
1663 skb_pull(skb, sizeof(struct fcoe_hdr));
1664 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1665
1666 stats->RxFrames++;
1667 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1668
1669 fp = (struct fc_frame *)skb;
1670 fc_frame_init(fp);
1671 fr_dev(fp) = lport;
1672 fr_sof(fp) = hp->fcoe_sof;
1673
1674 /* Copy out the CRC and EOF trailer for access */
Joe Eykholtf018b732010-03-12 16:08:55 -08001675 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1676 goto drop;
Chris Leech859b7b62009-11-20 14:54:47 -08001677 fr_eof(fp) = crc_eof.fcoe_eof;
1678 fr_crc(fp) = crc_eof.fcoe_crc32;
Joe Eykholtf018b732010-03-12 16:08:55 -08001679 if (pskb_trim(skb, fr_len))
1680 goto drop;
Chris Leech859b7b62009-11-20 14:54:47 -08001681
1682 /*
1683 * We only check CRC if no offload is available and if it is
1684 * it's solicited data, in which case, the FCP layer would
1685 * check it during the copy.
1686 */
1687 if (lport->crc_offload &&
1688 skb->ip_summed == CHECKSUM_UNNECESSARY)
1689 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1690 else
1691 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1692
1693 fh = fc_frame_header_get(fp);
Joe Eykholtf018b732010-03-12 16:08:55 -08001694 if ((fh->fh_r_ctl != FC_RCTL_DD_SOL_DATA ||
1695 fh->fh_type != FC_TYPE_FCP) &&
1696 (fr_flags(fp) & FCPHF_CRC_UNCHECKED)) {
Chris Leech859b7b62009-11-20 14:54:47 -08001697 if (le32_to_cpu(fr_crc(fp)) !=
1698 ~crc32(~0, skb->data, fr_len)) {
1699 if (stats->InvalidCRCCount < 5)
1700 printk(KERN_WARNING "fcoe: dropping "
1701 "frame with CRC error\n");
1702 stats->InvalidCRCCount++;
Joe Eykholtf018b732010-03-12 16:08:55 -08001703 goto drop;
Chris Leech859b7b62009-11-20 14:54:47 -08001704 }
1705 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1706 }
Joe Eykholtf018b732010-03-12 16:08:55 -08001707 put_cpu();
Chris Leech859b7b62009-11-20 14:54:47 -08001708 fc_exch_recv(lport, fp);
Joe Eykholtf018b732010-03-12 16:08:55 -08001709 return;
1710
1711drop:
1712 stats->ErrorFrames++;
1713 put_cpu();
1714 kfree_skb(skb);
Chris Leech859b7b62009-11-20 14:54:47 -08001715}
1716
1717/**
Robert Love1875f272009-11-03 11:47:50 -08001718 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1719 * @arg: The per-CPU context
Robert Love85b4aa42008-12-09 15:10:24 -08001720 *
1721 * Return: 0 for success
Robert Love85b4aa42008-12-09 15:10:24 -08001722 */
1723int fcoe_percpu_receive_thread(void *arg)
1724{
1725 struct fcoe_percpu_s *p = arg;
Robert Love85b4aa42008-12-09 15:10:24 -08001726 struct sk_buff *skb;
Robert Love85b4aa42008-12-09 15:10:24 -08001727
Robert Love4469c192009-02-27 10:56:38 -08001728 set_user_nice(current, -20);
Robert Love85b4aa42008-12-09 15:10:24 -08001729
1730 while (!kthread_should_stop()) {
1731
1732 spin_lock_bh(&p->fcoe_rx_list.lock);
1733 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1734 set_current_state(TASK_INTERRUPTIBLE);
1735 spin_unlock_bh(&p->fcoe_rx_list.lock);
1736 schedule();
1737 set_current_state(TASK_RUNNING);
1738 if (kthread_should_stop())
1739 return 0;
1740 spin_lock_bh(&p->fcoe_rx_list.lock);
1741 }
1742 spin_unlock_bh(&p->fcoe_rx_list.lock);
Chris Leech859b7b62009-11-20 14:54:47 -08001743 fcoe_recv_frame(skb);
Robert Love85b4aa42008-12-09 15:10:24 -08001744 }
1745 return 0;
1746}
1747
1748/**
Robert Love1875f272009-11-03 11:47:50 -08001749 * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
1750 * @lport: The local port whose backlog is to be cleared
Robert Love85b4aa42008-12-09 15:10:24 -08001751 *
Robert Love1875f272009-11-03 11:47:50 -08001752 * This empties the wait_queue, dequeues the head of the wait_queue queue
1753 * and calls fcoe_start_io() for each packet. If all skb have been
1754 * transmitted it returns the qlen. If an error occurs it restores
1755 * wait_queue (to try again later) and returns -1.
Robert Love85b4aa42008-12-09 15:10:24 -08001756 *
Robert Love1875f272009-11-03 11:47:50 -08001757 * The wait_queue is used when the skb transmit fails. The failed skb
1758 * will go in the wait_queue which will be emptied by the timer function or
Robert Love85b4aa42008-12-09 15:10:24 -08001759 * by the next skb transmit.
Robert Love34f42a02009-02-27 10:55:45 -08001760 */
Robert Love1875f272009-11-03 11:47:50 -08001761static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
Robert Love85b4aa42008-12-09 15:10:24 -08001762{
Robert Love1875f272009-11-03 11:47:50 -08001763 struct fcoe_port *port = lport_priv(lport);
Vasu Dev4bb6b512009-05-06 10:52:34 -07001764 int rc;
Robert Love85b4aa42008-12-09 15:10:24 -08001765
Chris Leech014f5c32009-08-25 13:59:30 -07001766 spin_lock_bh(&port->fcoe_pending_queue.lock);
Vasu Dev4bb6b512009-05-06 10:52:34 -07001767
1768 if (skb)
Chris Leech014f5c32009-08-25 13:59:30 -07001769 __skb_queue_tail(&port->fcoe_pending_queue, skb);
Vasu Dev4bb6b512009-05-06 10:52:34 -07001770
Chris Leech014f5c32009-08-25 13:59:30 -07001771 if (port->fcoe_pending_queue_active)
Vasu Devc826a312009-02-27 10:56:27 -08001772 goto out;
Chris Leech014f5c32009-08-25 13:59:30 -07001773 port->fcoe_pending_queue_active = 1;
Chris Leech55c8baf2009-02-27 10:56:32 -08001774
Chris Leech014f5c32009-08-25 13:59:30 -07001775 while (port->fcoe_pending_queue.qlen) {
Chris Leech55c8baf2009-02-27 10:56:32 -08001776 /* keep qlen > 0 until fcoe_start_io succeeds */
Chris Leech014f5c32009-08-25 13:59:30 -07001777 port->fcoe_pending_queue.qlen++;
1778 skb = __skb_dequeue(&port->fcoe_pending_queue);
Chris Leech55c8baf2009-02-27 10:56:32 -08001779
Chris Leech014f5c32009-08-25 13:59:30 -07001780 spin_unlock_bh(&port->fcoe_pending_queue.lock);
Chris Leech55c8baf2009-02-27 10:56:32 -08001781 rc = fcoe_start_io(skb);
Chris Leech014f5c32009-08-25 13:59:30 -07001782 spin_lock_bh(&port->fcoe_pending_queue.lock);
Chris Leech55c8baf2009-02-27 10:56:32 -08001783
1784 if (rc) {
Chris Leech014f5c32009-08-25 13:59:30 -07001785 __skb_queue_head(&port->fcoe_pending_queue, skb);
Chris Leech55c8baf2009-02-27 10:56:32 -08001786 /* undo temporary increment above */
Chris Leech014f5c32009-08-25 13:59:30 -07001787 port->fcoe_pending_queue.qlen--;
Chris Leech55c8baf2009-02-27 10:56:32 -08001788 break;
Robert Love85b4aa42008-12-09 15:10:24 -08001789 }
Chris Leech55c8baf2009-02-27 10:56:32 -08001790 /* undo temporary increment above */
Chris Leech014f5c32009-08-25 13:59:30 -07001791 port->fcoe_pending_queue.qlen--;
Robert Love85b4aa42008-12-09 15:10:24 -08001792 }
Chris Leech55c8baf2009-02-27 10:56:32 -08001793
Chris Leech014f5c32009-08-25 13:59:30 -07001794 if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
Robert Love1875f272009-11-03 11:47:50 -08001795 lport->qfull = 0;
Chris Leech014f5c32009-08-25 13:59:30 -07001796 if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
1797 mod_timer(&port->timer, jiffies + 2);
1798 port->fcoe_pending_queue_active = 0;
Vasu Devc826a312009-02-27 10:56:27 -08001799out:
Chris Leech014f5c32009-08-25 13:59:30 -07001800 if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
Robert Love1875f272009-11-03 11:47:50 -08001801 lport->qfull = 1;
Chris Leech014f5c32009-08-25 13:59:30 -07001802 spin_unlock_bh(&port->fcoe_pending_queue.lock);
Vasu Dev4bb6b512009-05-06 10:52:34 -07001803 return;
Robert Love85b4aa42008-12-09 15:10:24 -08001804}
1805
1806/**
Robert Love1875f272009-11-03 11:47:50 -08001807 * fcoe_dev_setup() - Setup the link change notification interface
Robert Love34f42a02009-02-27 10:55:45 -08001808 */
Randy Dunlapb0d428a2009-04-27 21:49:31 -07001809static void fcoe_dev_setup(void)
Robert Love85b4aa42008-12-09 15:10:24 -08001810{
Robert Love85b4aa42008-12-09 15:10:24 -08001811 register_netdevice_notifier(&fcoe_notifier);
1812}
1813
1814/**
Robert Love1875f272009-11-03 11:47:50 -08001815 * fcoe_dev_cleanup() - Cleanup the link change notification interface
Robert Love34f42a02009-02-27 10:55:45 -08001816 */
Robert Love85b4aa42008-12-09 15:10:24 -08001817static void fcoe_dev_cleanup(void)
1818{
1819 unregister_netdevice_notifier(&fcoe_notifier);
1820}
1821
1822/**
Robert Love1875f272009-11-03 11:47:50 -08001823 * fcoe_device_notification() - Handler for net device events
1824 * @notifier: The context of the notification
1825 * @event: The type of event
1826 * @ptr: The net device that the event was on
Robert Love85b4aa42008-12-09 15:10:24 -08001827 *
Robert Love1875f272009-11-03 11:47:50 -08001828 * This function is called by the Ethernet driver in case of link change event.
Robert Love85b4aa42008-12-09 15:10:24 -08001829 *
1830 * Returns: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08001831 */
Robert Love85b4aa42008-12-09 15:10:24 -08001832static int fcoe_device_notification(struct notifier_block *notifier,
1833 ulong event, void *ptr)
1834{
Robert Love1875f272009-11-03 11:47:50 -08001835 struct fc_lport *lport = NULL;
Vasu Dev1d1b88d2009-07-29 17:05:45 -07001836 struct net_device *netdev = ptr;
Chris Leech014f5c32009-08-25 13:59:30 -07001837 struct fcoe_interface *fcoe;
Chris Leech2e70e242009-08-25 14:00:23 -07001838 struct fcoe_port *port;
Robert Love85b4aa42008-12-09 15:10:24 -08001839 struct fcoe_dev_stats *stats;
Joe Eykholt97c83892009-03-17 11:42:40 -07001840 u32 link_possible = 1;
Robert Love85b4aa42008-12-09 15:10:24 -08001841 u32 mfs;
1842 int rc = NOTIFY_OK;
1843
Chris Leech014f5c32009-08-25 13:59:30 -07001844 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
Chris Leech25024982009-08-25 13:59:35 -07001845 if (fcoe->netdev == netdev) {
Robert Love1875f272009-11-03 11:47:50 -08001846 lport = fcoe->ctlr.lp;
Robert Love85b4aa42008-12-09 15:10:24 -08001847 break;
1848 }
1849 }
Robert Love1875f272009-11-03 11:47:50 -08001850 if (!lport) {
Robert Love85b4aa42008-12-09 15:10:24 -08001851 rc = NOTIFY_DONE;
1852 goto out;
1853 }
1854
Robert Love85b4aa42008-12-09 15:10:24 -08001855 switch (event) {
1856 case NETDEV_DOWN:
1857 case NETDEV_GOING_DOWN:
Joe Eykholt97c83892009-03-17 11:42:40 -07001858 link_possible = 0;
Robert Love85b4aa42008-12-09 15:10:24 -08001859 break;
1860 case NETDEV_UP:
1861 case NETDEV_CHANGE:
Robert Love85b4aa42008-12-09 15:10:24 -08001862 break;
1863 case NETDEV_CHANGEMTU:
Yi Zou7221d7e2009-10-21 16:27:52 -07001864 if (netdev->features & NETIF_F_FCOE_MTU)
1865 break;
Vasu Dev1d1b88d2009-07-29 17:05:45 -07001866 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1867 sizeof(struct fcoe_crc_eof));
Robert Love85b4aa42008-12-09 15:10:24 -08001868 if (mfs >= FC_MIN_MAX_FRAME)
Robert Love1875f272009-11-03 11:47:50 -08001869 fc_set_mfs(lport, mfs);
Robert Love85b4aa42008-12-09 15:10:24 -08001870 break;
1871 case NETDEV_REGISTER:
1872 break;
Chris Leech2e70e242009-08-25 14:00:23 -07001873 case NETDEV_UNREGISTER:
1874 list_del(&fcoe->list);
1875 port = lport_priv(fcoe->ctlr.lp);
1876 fcoe_interface_cleanup(fcoe);
1877 schedule_work(&port->destroy_work);
1878 goto out;
1879 break;
Yi Zou54a5b212010-07-20 15:21:17 -07001880 case NETDEV_FEAT_CHANGE:
1881 fcoe_netdev_features_change(lport, netdev);
1882 break;
Robert Love85b4aa42008-12-09 15:10:24 -08001883 default:
Vasu Dev1d1b88d2009-07-29 17:05:45 -07001884 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
Robert Loved5488eb2009-06-10 15:30:59 -07001885 "from netdev netlink\n", event);
Robert Love85b4aa42008-12-09 15:10:24 -08001886 }
Robert Love5e4f8fe2010-05-07 15:18:35 -07001887
1888 fcoe_link_speed_update(lport);
1889
Robert Love1875f272009-11-03 11:47:50 -08001890 if (link_possible && !fcoe_link_ok(lport))
Chris Leech3fe9a0b2009-08-25 13:59:46 -07001891 fcoe_ctlr_link_up(&fcoe->ctlr);
1892 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
Joe Eykholtf018b732010-03-12 16:08:55 -08001893 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
Joe Eykholt97c83892009-03-17 11:42:40 -07001894 stats->LinkFailureCount++;
Joe Eykholtf018b732010-03-12 16:08:55 -08001895 put_cpu();
Robert Love1875f272009-11-03 11:47:50 -08001896 fcoe_clean_pending_queue(lport);
Robert Love85b4aa42008-12-09 15:10:24 -08001897 }
1898out:
1899 return rc;
1900}
1901
1902/**
Robert Love1875f272009-11-03 11:47:50 -08001903 * fcoe_if_to_netdev() - Parse a name buffer to get a net device
1904 * @buffer: The name of the net device
Robert Love85b4aa42008-12-09 15:10:24 -08001905 *
Robert Love1875f272009-11-03 11:47:50 -08001906 * Returns: NULL or a ptr to net_device
Robert Love34f42a02009-02-27 10:55:45 -08001907 */
Robert Love85b4aa42008-12-09 15:10:24 -08001908static struct net_device *fcoe_if_to_netdev(const char *buffer)
1909{
1910 char *cp;
1911 char ifname[IFNAMSIZ + 2];
1912
1913 if (buffer) {
1914 strlcpy(ifname, buffer, IFNAMSIZ);
1915 cp = ifname + strlen(ifname);
1916 while (--cp >= ifname && *cp == '\n')
1917 *cp = '\0';
1918 return dev_get_by_name(&init_net, ifname);
1919 }
1920 return NULL;
1921}
1922
1923/**
Vasu Dev55a66d32009-12-10 09:59:31 -08001924 * fcoe_disable() - Disables a FCoE interface
1925 * @buffer: The name of the Ethernet interface to be disabled
1926 * @kp: The associated kernel parameter
1927 *
1928 * Called from sysfs.
1929 *
1930 * Returns: 0 for success
1931 */
1932static int fcoe_disable(const char *buffer, struct kernel_param *kp)
1933{
1934 struct fcoe_interface *fcoe;
1935 struct net_device *netdev;
1936 int rc = 0;
1937
1938 mutex_lock(&fcoe_config_mutex);
1939#ifdef CONFIG_FCOE_MODULE
1940 /*
1941 * Make sure the module has been initialized, and is not about to be
1942 * removed. Module paramter sysfs files are writable before the
1943 * module_init function is called and after module_exit.
1944 */
1945 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1946 rc = -ENODEV;
1947 goto out_nodev;
1948 }
1949#endif
1950
1951 netdev = fcoe_if_to_netdev(buffer);
1952 if (!netdev) {
1953 rc = -ENODEV;
1954 goto out_nodev;
1955 }
1956
Vasu Dev34ce27b2010-05-07 15:18:46 -07001957 if (!rtnl_trylock()) {
1958 dev_put(netdev);
1959 mutex_unlock(&fcoe_config_mutex);
1960 return restart_syscall();
1961 }
1962
Vasu Dev55a66d32009-12-10 09:59:31 -08001963 fcoe = fcoe_hostlist_lookup_port(netdev);
1964 rtnl_unlock();
1965
Chris Leech9ee50e42010-04-09 14:22:23 -07001966 if (fcoe) {
Chris Leech9ee50e42010-04-09 14:22:23 -07001967 fcoe_ctlr_link_down(&fcoe->ctlr);
Vasu Dev9d4cbc02010-07-20 15:19:26 -07001968 fcoe_clean_pending_queue(fcoe->ctlr.lp);
Chris Leech9ee50e42010-04-09 14:22:23 -07001969 } else
Vasu Dev55a66d32009-12-10 09:59:31 -08001970 rc = -ENODEV;
1971
1972 dev_put(netdev);
1973out_nodev:
1974 mutex_unlock(&fcoe_config_mutex);
1975 return rc;
1976}
1977
1978/**
1979 * fcoe_enable() - Enables a FCoE interface
1980 * @buffer: The name of the Ethernet interface to be enabled
1981 * @kp: The associated kernel parameter
1982 *
1983 * Called from sysfs.
1984 *
1985 * Returns: 0 for success
1986 */
1987static int fcoe_enable(const char *buffer, struct kernel_param *kp)
1988{
1989 struct fcoe_interface *fcoe;
1990 struct net_device *netdev;
1991 int rc = 0;
1992
1993 mutex_lock(&fcoe_config_mutex);
1994#ifdef CONFIG_FCOE_MODULE
1995 /*
1996 * Make sure the module has been initialized, and is not about to be
1997 * removed. Module paramter sysfs files are writable before the
1998 * module_init function is called and after module_exit.
1999 */
2000 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
2001 rc = -ENODEV;
2002 goto out_nodev;
2003 }
2004#endif
2005
2006 netdev = fcoe_if_to_netdev(buffer);
2007 if (!netdev) {
2008 rc = -ENODEV;
2009 goto out_nodev;
2010 }
2011
Vasu Dev34ce27b2010-05-07 15:18:46 -07002012 if (!rtnl_trylock()) {
2013 dev_put(netdev);
2014 mutex_unlock(&fcoe_config_mutex);
2015 return restart_syscall();
2016 }
2017
Vasu Dev55a66d32009-12-10 09:59:31 -08002018 fcoe = fcoe_hostlist_lookup_port(netdev);
2019 rtnl_unlock();
2020
Vasu Dev9d4cbc02010-07-20 15:19:26 -07002021 if (!fcoe)
Vasu Dev55a66d32009-12-10 09:59:31 -08002022 rc = -ENODEV;
Vasu Dev9d4cbc02010-07-20 15:19:26 -07002023 else if (!fcoe_link_ok(fcoe->ctlr.lp))
2024 fcoe_ctlr_link_up(&fcoe->ctlr);
Vasu Dev55a66d32009-12-10 09:59:31 -08002025
2026 dev_put(netdev);
2027out_nodev:
2028 mutex_unlock(&fcoe_config_mutex);
2029 return rc;
2030}
2031
2032/**
Robert Love1875f272009-11-03 11:47:50 -08002033 * fcoe_destroy() - Destroy a FCoE interface
2034 * @buffer: The name of the Ethernet interface to be destroyed
2035 * @kp: The associated kernel parameter
2036 *
2037 * Called from sysfs.
Robert Love85b4aa42008-12-09 15:10:24 -08002038 *
2039 * Returns: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08002040 */
Robert Love85b4aa42008-12-09 15:10:24 -08002041static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
2042{
Chris Leech030f4e02009-08-25 14:00:02 -07002043 struct fcoe_interface *fcoe;
Chris Leech2e70e242009-08-25 14:00:23 -07002044 struct net_device *netdev;
Mike Christie8eca3552009-10-21 16:27:44 -07002045 int rc = 0;
Robert Love85b4aa42008-12-09 15:10:24 -08002046
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002047 mutex_lock(&fcoe_config_mutex);
2048#ifdef CONFIG_FCOE_MODULE
2049 /*
2050 * Make sure the module has been initialized, and is not about to be
2051 * removed. Module paramter sysfs files are writable before the
2052 * module_init function is called and after module_exit.
2053 */
2054 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
2055 rc = -ENODEV;
2056 goto out_nodev;
2057 }
2058#endif
2059
Robert Love85b4aa42008-12-09 15:10:24 -08002060 netdev = fcoe_if_to_netdev(buffer);
2061 if (!netdev) {
2062 rc = -ENODEV;
2063 goto out_nodev;
2064 }
Chris Leech2e70e242009-08-25 14:00:23 -07002065
Vasu Dev34ce27b2010-05-07 15:18:46 -07002066 if (!rtnl_trylock()) {
2067 dev_put(netdev);
2068 mutex_unlock(&fcoe_config_mutex);
2069 return restart_syscall();
2070 }
2071
Chris Leech2e70e242009-08-25 14:00:23 -07002072 fcoe = fcoe_hostlist_lookup_port(netdev);
2073 if (!fcoe) {
Chris Leech090eb6c2009-08-25 14:00:28 -07002074 rtnl_unlock();
Robert Love85b4aa42008-12-09 15:10:24 -08002075 rc = -ENODEV;
2076 goto out_putdev;
2077 }
Chris Leech2e70e242009-08-25 14:00:23 -07002078 fcoe_interface_cleanup(fcoe);
Yi Zou54a5b212010-07-20 15:21:17 -07002079 list_del(&fcoe->list);
Vasu Dev34ce27b2010-05-07 15:18:46 -07002080 /* RTNL mutex is dropped by fcoe_if_destroy */
Chris Leech2e70e242009-08-25 14:00:23 -07002081 fcoe_if_destroy(fcoe->ctlr.lp);
Rob Love6409ea62010-01-21 10:16:05 -08002082
Robert Love85b4aa42008-12-09 15:10:24 -08002083out_putdev:
2084 dev_put(netdev);
2085out_nodev:
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002086 mutex_unlock(&fcoe_config_mutex);
Robert Love85b4aa42008-12-09 15:10:24 -08002087 return rc;
2088}
2089
Robert Love1875f272009-11-03 11:47:50 -08002090/**
2091 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2092 * @work: Handle to the FCoE port to be destroyed
2093 */
Chris Leech2e70e242009-08-25 14:00:23 -07002094static void fcoe_destroy_work(struct work_struct *work)
2095{
2096 struct fcoe_port *port;
2097
2098 port = container_of(work, struct fcoe_port, destroy_work);
2099 mutex_lock(&fcoe_config_mutex);
Vasu Dev34ce27b2010-05-07 15:18:46 -07002100 rtnl_lock();
2101 /* RTNL mutex is dropped by fcoe_if_destroy */
Chris Leech2e70e242009-08-25 14:00:23 -07002102 fcoe_if_destroy(port->lport);
2103 mutex_unlock(&fcoe_config_mutex);
2104}
2105
Robert Love85b4aa42008-12-09 15:10:24 -08002106/**
Robert Love1875f272009-11-03 11:47:50 -08002107 * fcoe_create() - Create a fcoe interface
2108 * @buffer: The name of the Ethernet interface to create on
2109 * @kp: The associated kernel param
2110 *
2111 * Called from sysfs.
Robert Love85b4aa42008-12-09 15:10:24 -08002112 *
2113 * Returns: 0 for success
Robert Love34f42a02009-02-27 10:55:45 -08002114 */
Robert Love85b4aa42008-12-09 15:10:24 -08002115static int fcoe_create(const char *buffer, struct kernel_param *kp)
2116{
Joe Eykholt1dd454d2010-07-20 15:20:46 -07002117 enum fip_state fip_mode = (enum fip_state)(long)kp->arg;
Robert Love85b4aa42008-12-09 15:10:24 -08002118 int rc;
Chris Leech030f4e02009-08-25 14:00:02 -07002119 struct fcoe_interface *fcoe;
Chris Leechaf7f85d2009-08-25 13:59:24 -07002120 struct fc_lport *lport;
Robert Love85b4aa42008-12-09 15:10:24 -08002121 struct net_device *netdev;
2122
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002123 mutex_lock(&fcoe_config_mutex);
Vasu Dev34ce27b2010-05-07 15:18:46 -07002124
2125 if (!rtnl_trylock()) {
2126 mutex_unlock(&fcoe_config_mutex);
2127 return restart_syscall();
2128 }
2129
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002130#ifdef CONFIG_FCOE_MODULE
2131 /*
2132 * Make sure the module has been initialized, and is not about to be
2133 * removed. Module paramter sysfs files are writable before the
2134 * module_init function is called and after module_exit.
2135 */
2136 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
2137 rc = -ENODEV;
Vasu Dev721cafa2010-05-07 15:18:19 -07002138 goto out_nomod;
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002139 }
2140#endif
2141
Rob Love6409ea62010-01-21 10:16:05 -08002142 if (!try_module_get(THIS_MODULE)) {
2143 rc = -EINVAL;
2144 goto out_nomod;
2145 }
2146
Robert Love85b4aa42008-12-09 15:10:24 -08002147 netdev = fcoe_if_to_netdev(buffer);
2148 if (!netdev) {
2149 rc = -ENODEV;
2150 goto out_nodev;
2151 }
Chris Leech2e70e242009-08-25 14:00:23 -07002152
Robert Love85b4aa42008-12-09 15:10:24 -08002153 /* look for existing lport */
2154 if (fcoe_hostlist_lookup(netdev)) {
2155 rc = -EEXIST;
2156 goto out_putdev;
2157 }
Robert Love85b4aa42008-12-09 15:10:24 -08002158
Joe Eykholt1dd454d2010-07-20 15:20:46 -07002159 fcoe = fcoe_interface_create(netdev, fip_mode);
Chris Leech030f4e02009-08-25 14:00:02 -07002160 if (!fcoe) {
2161 rc = -ENOMEM;
2162 goto out_putdev;
2163 }
2164
Chris Leech9a057532009-11-03 11:46:40 -08002165 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
Chris Leechaf7f85d2009-08-25 13:59:24 -07002166 if (IS_ERR(lport)) {
Robert Loved5488eb2009-06-10 15:30:59 -07002167 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
Robert Love85b4aa42008-12-09 15:10:24 -08002168 netdev->name);
Robert Love85b4aa42008-12-09 15:10:24 -08002169 rc = -EIO;
Chris Leech2e70e242009-08-25 14:00:23 -07002170 fcoe_interface_cleanup(fcoe);
Chris Leech030f4e02009-08-25 14:00:02 -07002171 goto out_free;
Robert Love85b4aa42008-12-09 15:10:24 -08002172 }
Chris Leech030f4e02009-08-25 14:00:02 -07002173
Chris Leech54b649f2009-08-25 14:00:07 -07002174 /* Make this the "master" N_Port */
2175 fcoe->ctlr.lp = lport;
Chris Leech030f4e02009-08-25 14:00:02 -07002176
Chris Leechc863df32009-08-25 14:00:18 -07002177 /* add to lports list */
2178 fcoe_hostlist_add(lport);
2179
Chris Leech54b649f2009-08-25 14:00:07 -07002180 /* start FIP Discovery and FLOGI */
2181 lport->boot_time = jiffies;
2182 fc_fabric_login(lport);
2183 if (!fcoe_link_ok(lport))
2184 fcoe_ctlr_link_up(&fcoe->ctlr);
2185
Chris Leech54b649f2009-08-25 14:00:07 -07002186 /*
2187 * Release from init in fcoe_interface_create(), on success lport
2188 * should be holding a reference taken in fcoe_if_create().
2189 */
Chris Leech030f4e02009-08-25 14:00:02 -07002190 fcoe_interface_put(fcoe);
Rob Love6409ea62010-01-21 10:16:05 -08002191 dev_put(netdev);
2192 rtnl_unlock();
2193 mutex_unlock(&fcoe_config_mutex);
2194
2195 return 0;
2196out_free:
2197 fcoe_interface_put(fcoe);
Robert Love85b4aa42008-12-09 15:10:24 -08002198out_putdev:
2199 dev_put(netdev);
2200out_nodev:
Rob Love6409ea62010-01-21 10:16:05 -08002201 module_put(THIS_MODULE);
2202out_nomod:
Vasu Dev34ce27b2010-05-07 15:18:46 -07002203 rtnl_unlock();
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002204 mutex_unlock(&fcoe_config_mutex);
Robert Love85b4aa42008-12-09 15:10:24 -08002205 return rc;
2206}
2207
Robert Love34f42a02009-02-27 10:55:45 -08002208/**
Robert Love5e4f8fe2010-05-07 15:18:35 -07002209 * fcoe_link_speed_update() - Update the supported and actual link speeds
2210 * @lport: The local port to update speeds for
Robert Love85b4aa42008-12-09 15:10:24 -08002211 *
Robert Love5e4f8fe2010-05-07 15:18:35 -07002212 * Returns: 0 if the ethtool query was successful
2213 * -1 if the ethtool query failed
Robert Love85b4aa42008-12-09 15:10:24 -08002214 */
Robert Love5e4f8fe2010-05-07 15:18:35 -07002215int fcoe_link_speed_update(struct fc_lport *lport)
Robert Love85b4aa42008-12-09 15:10:24 -08002216{
Robert Love1875f272009-11-03 11:47:50 -08002217 struct fcoe_port *port = lport_priv(lport);
2218 struct net_device *netdev = port->fcoe->netdev;
Robert Love85b4aa42008-12-09 15:10:24 -08002219 struct ethtool_cmd ecmd = { ETHTOOL_GSET };
Robert Love85b4aa42008-12-09 15:10:24 -08002220
Robert Love5e4f8fe2010-05-07 15:18:35 -07002221 if (!dev_ethtool_get_settings(netdev, &ecmd)) {
Robert Love1875f272009-11-03 11:47:50 -08002222 lport->link_supported_speeds &=
Yi Zou2f718d62009-07-29 17:04:01 -07002223 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
2224 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
2225 SUPPORTED_1000baseT_Full))
Robert Love1875f272009-11-03 11:47:50 -08002226 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
Yi Zou2f718d62009-07-29 17:04:01 -07002227 if (ecmd.supported & SUPPORTED_10000baseT_Full)
Robert Love1875f272009-11-03 11:47:50 -08002228 lport->link_supported_speeds |=
Yi Zou2f718d62009-07-29 17:04:01 -07002229 FC_PORTSPEED_10GBIT;
2230 if (ecmd.speed == SPEED_1000)
Robert Love1875f272009-11-03 11:47:50 -08002231 lport->link_speed = FC_PORTSPEED_1GBIT;
Yi Zou2f718d62009-07-29 17:04:01 -07002232 if (ecmd.speed == SPEED_10000)
Robert Love1875f272009-11-03 11:47:50 -08002233 lport->link_speed = FC_PORTSPEED_10GBIT;
Robert Love85b4aa42008-12-09 15:10:24 -08002234
Yi Zou2f718d62009-07-29 17:04:01 -07002235 return 0;
2236 }
2237 return -1;
Robert Love85b4aa42008-12-09 15:10:24 -08002238}
Robert Love85b4aa42008-12-09 15:10:24 -08002239
Robert Love34f42a02009-02-27 10:55:45 -08002240/**
Robert Love5e4f8fe2010-05-07 15:18:35 -07002241 * fcoe_link_ok() - Check if the link is OK for a local port
2242 * @lport: The local port to check link on
2243 *
2244 * Returns: 0 if link is UP and OK, -1 if not
2245 *
2246 */
2247int fcoe_link_ok(struct fc_lport *lport)
2248{
2249 struct fcoe_port *port = lport_priv(lport);
2250 struct net_device *netdev = port->fcoe->netdev;
2251
2252 if (netif_oper_up(netdev))
2253 return 0;
2254 return -1;
2255}
2256
2257/**
Robert Love1875f272009-11-03 11:47:50 -08002258 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2259 * @lport: The local port whose skbs are to be cleared
Joe Eykholte7a51992009-08-25 14:04:08 -07002260 *
2261 * Must be called with fcoe_create_mutex held to single-thread completion.
2262 *
2263 * This flushes the pending skbs by adding a new skb to each queue and
2264 * waiting until they are all freed. This assures us that not only are
2265 * there no packets that will be handled by the lport, but also that any
2266 * threads already handling packet have returned.
Robert Love85b4aa42008-12-09 15:10:24 -08002267 */
Robert Love1875f272009-11-03 11:47:50 -08002268void fcoe_percpu_clean(struct fc_lport *lport)
Robert Love85b4aa42008-12-09 15:10:24 -08002269{
Robert Love85b4aa42008-12-09 15:10:24 -08002270 struct fcoe_percpu_s *pp;
2271 struct fcoe_rcv_info *fr;
2272 struct sk_buff_head *list;
2273 struct sk_buff *skb, *next;
2274 struct sk_buff *head;
Robert Love5e5e92d2009-03-17 11:41:35 -07002275 unsigned int cpu;
Robert Love85b4aa42008-12-09 15:10:24 -08002276
Robert Love5e5e92d2009-03-17 11:41:35 -07002277 for_each_possible_cpu(cpu) {
2278 pp = &per_cpu(fcoe_percpu, cpu);
2279 spin_lock_bh(&pp->fcoe_rx_list.lock);
2280 list = &pp->fcoe_rx_list;
2281 head = list->next;
2282 for (skb = head; skb != (struct sk_buff *)list;
2283 skb = next) {
2284 next = skb->next;
2285 fr = fcoe_dev_from_skb(skb);
Robert Love1875f272009-11-03 11:47:50 -08002286 if (fr->fr_dev == lport) {
Robert Love5e5e92d2009-03-17 11:41:35 -07002287 __skb_unlink(skb, list);
2288 kfree_skb(skb);
Robert Love85b4aa42008-12-09 15:10:24 -08002289 }
Robert Love85b4aa42008-12-09 15:10:24 -08002290 }
Joe Eykholte7a51992009-08-25 14:04:08 -07002291
2292 if (!pp->thread || !cpu_online(cpu)) {
2293 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2294 continue;
2295 }
2296
2297 skb = dev_alloc_skb(0);
2298 if (!skb) {
2299 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2300 continue;
2301 }
2302 skb->destructor = fcoe_percpu_flush_done;
2303
2304 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2305 if (pp->fcoe_rx_list.qlen == 1)
2306 wake_up_process(pp->thread);
Robert Love5e5e92d2009-03-17 11:41:35 -07002307 spin_unlock_bh(&pp->fcoe_rx_list.lock);
Joe Eykholte7a51992009-08-25 14:04:08 -07002308
2309 wait_for_completion(&fcoe_flush_completion);
Robert Love85b4aa42008-12-09 15:10:24 -08002310 }
2311}
Robert Love85b4aa42008-12-09 15:10:24 -08002312
2313/**
Robert Love34f42a02009-02-27 10:55:45 -08002314 * fcoe_clean_pending_queue() - Dequeue a skb and free it
Robert Love1875f272009-11-03 11:47:50 -08002315 * @lport: The local port to dequeue a skb on
Robert Love34f42a02009-02-27 10:55:45 -08002316 */
Robert Love1875f272009-11-03 11:47:50 -08002317void fcoe_clean_pending_queue(struct fc_lport *lport)
Robert Love85b4aa42008-12-09 15:10:24 -08002318{
Robert Love1875f272009-11-03 11:47:50 -08002319 struct fcoe_port *port = lport_priv(lport);
Robert Love85b4aa42008-12-09 15:10:24 -08002320 struct sk_buff *skb;
2321
Chris Leech014f5c32009-08-25 13:59:30 -07002322 spin_lock_bh(&port->fcoe_pending_queue.lock);
2323 while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
2324 spin_unlock_bh(&port->fcoe_pending_queue.lock);
Robert Love85b4aa42008-12-09 15:10:24 -08002325 kfree_skb(skb);
Chris Leech014f5c32009-08-25 13:59:30 -07002326 spin_lock_bh(&port->fcoe_pending_queue.lock);
Robert Love85b4aa42008-12-09 15:10:24 -08002327 }
Chris Leech014f5c32009-08-25 13:59:30 -07002328 spin_unlock_bh(&port->fcoe_pending_queue.lock);
Robert Love85b4aa42008-12-09 15:10:24 -08002329}
Robert Love85b4aa42008-12-09 15:10:24 -08002330
2331/**
Robert Love1875f272009-11-03 11:47:50 -08002332 * fcoe_reset() - Reset a local port
2333 * @shost: The SCSI host associated with the local port to be reset
Robert Love85b4aa42008-12-09 15:10:24 -08002334 *
Robert Love1875f272009-11-03 11:47:50 -08002335 * Returns: Always 0 (return value required by FC transport template)
Robert Love85b4aa42008-12-09 15:10:24 -08002336 */
2337int fcoe_reset(struct Scsi_Host *shost)
2338{
2339 struct fc_lport *lport = shost_priv(shost);
2340 fc_lport_reset(lport);
2341 return 0;
2342}
Robert Love85b4aa42008-12-09 15:10:24 -08002343
Robert Love34f42a02009-02-27 10:55:45 -08002344/**
Robert Love1875f272009-11-03 11:47:50 -08002345 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2346 * @netdev: The net device used as a key
Robert Love85b4aa42008-12-09 15:10:24 -08002347 *
Robert Love1875f272009-11-03 11:47:50 -08002348 * Locking: Must be called with the RNL mutex held.
2349 *
2350 * Returns: NULL or the FCoE interface
Robert Love85b4aa42008-12-09 15:10:24 -08002351 */
Chris Leech014f5c32009-08-25 13:59:30 -07002352static struct fcoe_interface *
Robert Love1875f272009-11-03 11:47:50 -08002353fcoe_hostlist_lookup_port(const struct net_device *netdev)
Robert Love85b4aa42008-12-09 15:10:24 -08002354{
Chris Leech014f5c32009-08-25 13:59:30 -07002355 struct fcoe_interface *fcoe;
Robert Love85b4aa42008-12-09 15:10:24 -08002356
Chris Leech014f5c32009-08-25 13:59:30 -07002357 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
Robert Love1875f272009-11-03 11:47:50 -08002358 if (fcoe->netdev == netdev)
Chris Leech014f5c32009-08-25 13:59:30 -07002359 return fcoe;
Robert Love85b4aa42008-12-09 15:10:24 -08002360 }
Robert Love85b4aa42008-12-09 15:10:24 -08002361 return NULL;
2362}
2363
Robert Love34f42a02009-02-27 10:55:45 -08002364/**
Robert Love1875f272009-11-03 11:47:50 -08002365 * fcoe_hostlist_lookup() - Find the local port associated with a
2366 * given net device
2367 * @netdev: The netdevice used as a key
Robert Love85b4aa42008-12-09 15:10:24 -08002368 *
Robert Love1875f272009-11-03 11:47:50 -08002369 * Locking: Must be called with the RTNL mutex held
2370 *
2371 * Returns: NULL or the local port
Robert Love85b4aa42008-12-09 15:10:24 -08002372 */
Chris Leech090eb6c2009-08-25 14:00:28 -07002373static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
Robert Love85b4aa42008-12-09 15:10:24 -08002374{
Chris Leech014f5c32009-08-25 13:59:30 -07002375 struct fcoe_interface *fcoe;
Robert Love85b4aa42008-12-09 15:10:24 -08002376
Chris Leech014f5c32009-08-25 13:59:30 -07002377 fcoe = fcoe_hostlist_lookup_port(netdev);
Chris Leech3fe9a0b2009-08-25 13:59:46 -07002378 return (fcoe) ? fcoe->ctlr.lp : NULL;
Robert Love85b4aa42008-12-09 15:10:24 -08002379}
Robert Love85b4aa42008-12-09 15:10:24 -08002380
Robert Love34f42a02009-02-27 10:55:45 -08002381/**
Robert Love1875f272009-11-03 11:47:50 -08002382 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2383 * port to the hostlist
2384 * @lport: The local port that identifies the FCoE interface to be added
2385 *
2386 * Locking: must be called with the RTNL mutex held
Robert Love85b4aa42008-12-09 15:10:24 -08002387 *
2388 * Returns: 0 for success
2389 */
Chris Leech090eb6c2009-08-25 14:00:28 -07002390static int fcoe_hostlist_add(const struct fc_lport *lport)
Robert Love85b4aa42008-12-09 15:10:24 -08002391{
Chris Leech014f5c32009-08-25 13:59:30 -07002392 struct fcoe_interface *fcoe;
2393 struct fcoe_port *port;
Robert Love85b4aa42008-12-09 15:10:24 -08002394
Chris Leech014f5c32009-08-25 13:59:30 -07002395 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2396 if (!fcoe) {
2397 port = lport_priv(lport);
2398 fcoe = port->fcoe;
2399 list_add_tail(&fcoe->list, &fcoe_hostlist);
Robert Love85b4aa42008-12-09 15:10:24 -08002400 }
2401 return 0;
2402}
Robert Love85b4aa42008-12-09 15:10:24 -08002403
Robert Love34f42a02009-02-27 10:55:45 -08002404/**
Robert Love1875f272009-11-03 11:47:50 -08002405 * fcoe_init() - Initialize fcoe.ko
Robert Love85b4aa42008-12-09 15:10:24 -08002406 *
Robert Love1875f272009-11-03 11:47:50 -08002407 * Returns: 0 on success, or a negative value on failure
Robert Love34f42a02009-02-27 10:55:45 -08002408 */
Robert Love85b4aa42008-12-09 15:10:24 -08002409static int __init fcoe_init(void)
2410{
Robert Love1875f272009-11-03 11:47:50 -08002411 struct fcoe_percpu_s *p;
Robert Love38eccab2009-03-17 11:41:30 -07002412 unsigned int cpu;
Robert Love8976f422009-03-17 11:41:46 -07002413 int rc = 0;
Robert Love85b4aa42008-12-09 15:10:24 -08002414
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002415 mutex_lock(&fcoe_config_mutex);
2416
Robert Love38eccab2009-03-17 11:41:30 -07002417 for_each_possible_cpu(cpu) {
Robert Love5e5e92d2009-03-17 11:41:35 -07002418 p = &per_cpu(fcoe_percpu, cpu);
Robert Love38eccab2009-03-17 11:41:30 -07002419 skb_queue_head_init(&p->fcoe_rx_list);
2420 }
2421
Robert Love8976f422009-03-17 11:41:46 -07002422 for_each_online_cpu(cpu)
2423 fcoe_percpu_thread_create(cpu);
Robert Love85b4aa42008-12-09 15:10:24 -08002424
Robert Love8976f422009-03-17 11:41:46 -07002425 /* Initialize per CPU interrupt thread */
2426 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2427 if (rc)
2428 goto out_free;
Robert Love85b4aa42008-12-09 15:10:24 -08002429
Robert Love8976f422009-03-17 11:41:46 -07002430 /* Setup link change notification */
Robert Love85b4aa42008-12-09 15:10:24 -08002431 fcoe_dev_setup();
2432
Chris Leech5892c322009-08-25 13:59:14 -07002433 rc = fcoe_if_init();
2434 if (rc)
2435 goto out_free;
Robert Love85b4aa42008-12-09 15:10:24 -08002436
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002437 mutex_unlock(&fcoe_config_mutex);
Robert Love85b4aa42008-12-09 15:10:24 -08002438 return 0;
Robert Love8976f422009-03-17 11:41:46 -07002439
2440out_free:
2441 for_each_online_cpu(cpu) {
2442 fcoe_percpu_thread_destroy(cpu);
2443 }
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002444 mutex_unlock(&fcoe_config_mutex);
Robert Love8976f422009-03-17 11:41:46 -07002445 return rc;
Robert Love85b4aa42008-12-09 15:10:24 -08002446}
2447module_init(fcoe_init);
2448
2449/**
Robert Love1875f272009-11-03 11:47:50 -08002450 * fcoe_exit() - Clean up fcoe.ko
Robert Love85b4aa42008-12-09 15:10:24 -08002451 *
Robert Love1875f272009-11-03 11:47:50 -08002452 * Returns: 0 on success or a negative value on failure
Robert Love34f42a02009-02-27 10:55:45 -08002453 */
Robert Love85b4aa42008-12-09 15:10:24 -08002454static void __exit fcoe_exit(void)
2455{
Chris Leech014f5c32009-08-25 13:59:30 -07002456 struct fcoe_interface *fcoe, *tmp;
Chris Leech2e70e242009-08-25 14:00:23 -07002457 struct fcoe_port *port;
Robert Love1875f272009-11-03 11:47:50 -08002458 unsigned int cpu;
Robert Love85b4aa42008-12-09 15:10:24 -08002459
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002460 mutex_lock(&fcoe_config_mutex);
2461
Robert Love85b4aa42008-12-09 15:10:24 -08002462 fcoe_dev_cleanup();
2463
Vasu Dev5919a592009-03-27 09:03:29 -07002464 /* releases the associated fcoe hosts */
Chris Leech090eb6c2009-08-25 14:00:28 -07002465 rtnl_lock();
2466 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
Chris Leechc863df32009-08-25 14:00:18 -07002467 list_del(&fcoe->list);
Chris Leech2e70e242009-08-25 14:00:23 -07002468 port = lport_priv(fcoe->ctlr.lp);
Chris Leech2e70e242009-08-25 14:00:23 -07002469 fcoe_interface_cleanup(fcoe);
Chris Leech2e70e242009-08-25 14:00:23 -07002470 schedule_work(&port->destroy_work);
Chris Leechc863df32009-08-25 14:00:18 -07002471 }
Chris Leech090eb6c2009-08-25 14:00:28 -07002472 rtnl_unlock();
Robert Love85b4aa42008-12-09 15:10:24 -08002473
Robert Love8976f422009-03-17 11:41:46 -07002474 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2475
Chris Leech014f5c32009-08-25 13:59:30 -07002476 for_each_online_cpu(cpu)
Robert Love8976f422009-03-17 11:41:46 -07002477 fcoe_percpu_thread_destroy(cpu);
Robert Love85b4aa42008-12-09 15:10:24 -08002478
Chris Leechdfc1d0f2009-08-25 14:00:13 -07002479 mutex_unlock(&fcoe_config_mutex);
Chris Leech2e70e242009-08-25 14:00:23 -07002480
2481 /* flush any asyncronous interface destroys,
2482 * this should happen after the netdev notifier is unregistered */
2483 flush_scheduled_work();
Chris Leech9a057532009-11-03 11:46:40 -08002484 /* That will flush out all the N_Ports on the hostlist, but now we
2485 * may have NPIV VN_Ports scheduled for destruction */
2486 flush_scheduled_work();
Chris Leech2e70e242009-08-25 14:00:23 -07002487
2488 /* detach from scsi transport
2489 * must happen after all destroys are done, therefor after the flush */
2490 fcoe_if_exit();
Robert Love85b4aa42008-12-09 15:10:24 -08002491}
2492module_exit(fcoe_exit);
Chris Leech11b56182009-11-03 11:46:29 -08002493
2494/**
2495 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2496 * @seq: active sequence in the FLOGI or FDISC exchange
2497 * @fp: response frame, or error encoded in a pointer (timeout)
2498 * @arg: pointer the the fcoe_ctlr structure
2499 *
Uwe Kleine-König65155b32010-06-11 12:17:01 +02002500 * This handles MAC address management for FCoE, then passes control on to
Chris Leech11b56182009-11-03 11:46:29 -08002501 * the libfc FLOGI response handler.
2502 */
2503static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2504{
2505 struct fcoe_ctlr *fip = arg;
2506 struct fc_exch *exch = fc_seq_exch(seq);
2507 struct fc_lport *lport = exch->lp;
2508 u8 *mac;
2509
2510 if (IS_ERR(fp))
2511 goto done;
2512
2513 mac = fr_cb(fp)->granted_mac;
2514 if (is_zero_ether_addr(mac)) {
2515 /* pre-FIP */
Joe Eykholt386309ce2009-11-03 11:49:16 -08002516 if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
Chris Leech11b56182009-11-03 11:46:29 -08002517 fc_frame_free(fp);
2518 return;
2519 }
Chris Leech11b56182009-11-03 11:46:29 -08002520 }
Joe Eykholt386309ce2009-11-03 11:49:16 -08002521 fcoe_update_src_mac(lport, mac);
Chris Leech11b56182009-11-03 11:46:29 -08002522done:
2523 fc_lport_flogi_resp(seq, fp, lport);
2524}
2525
2526/**
2527 * fcoe_logo_resp() - FCoE specific LOGO response handler
2528 * @seq: active sequence in the LOGO exchange
2529 * @fp: response frame, or error encoded in a pointer (timeout)
2530 * @arg: pointer the the fcoe_ctlr structure
2531 *
Uwe Kleine-König65155b32010-06-11 12:17:01 +02002532 * This handles MAC address management for FCoE, then passes control on to
Chris Leech11b56182009-11-03 11:46:29 -08002533 * the libfc LOGO response handler.
2534 */
2535static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2536{
Joe Eykholt386309ce2009-11-03 11:49:16 -08002537 struct fc_lport *lport = arg;
Chris Leech11b56182009-11-03 11:46:29 -08002538 static u8 zero_mac[ETH_ALEN] = { 0 };
2539
2540 if (!IS_ERR(fp))
Joe Eykholt386309ce2009-11-03 11:49:16 -08002541 fcoe_update_src_mac(lport, zero_mac);
Chris Leech11b56182009-11-03 11:46:29 -08002542 fc_lport_logo_resp(seq, fp, lport);
2543}
2544
2545/**
2546 * fcoe_elsct_send - FCoE specific ELS handler
2547 *
2548 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2549 * using FCoE specific response handlers and passing the FIP controller as
2550 * the argument (the lport is still available from the exchange).
2551 *
2552 * Most of the work here is just handed off to the libfc routine.
2553 */
Robert Love1875f272009-11-03 11:47:50 -08002554static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2555 struct fc_frame *fp, unsigned int op,
2556 void (*resp)(struct fc_seq *,
2557 struct fc_frame *,
2558 void *),
2559 void *arg, u32 timeout)
Chris Leech11b56182009-11-03 11:46:29 -08002560{
2561 struct fcoe_port *port = lport_priv(lport);
2562 struct fcoe_interface *fcoe = port->fcoe;
2563 struct fcoe_ctlr *fip = &fcoe->ctlr;
2564 struct fc_frame_header *fh = fc_frame_header_get(fp);
2565
2566 switch (op) {
2567 case ELS_FLOGI:
2568 case ELS_FDISC:
Joe Eykholte10f8c62010-07-20 15:20:30 -07002569 if (lport->point_to_multipoint)
2570 break;
Chris Leech11b56182009-11-03 11:46:29 -08002571 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2572 fip, timeout);
2573 case ELS_LOGO:
2574 /* only hook onto fabric logouts, not port logouts */
2575 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2576 break;
2577 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
Joe Eykholt386309ce2009-11-03 11:49:16 -08002578 lport, timeout);
Chris Leech11b56182009-11-03 11:46:29 -08002579 }
2580 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2581}
2582
Chris Leech9a057532009-11-03 11:46:40 -08002583/**
2584 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2585 * @vport: fc_vport object to create a new fc_host for
2586 * @disabled: start the new fc_host in a disabled state by default?
2587 *
2588 * Returns: 0 for success
2589 */
2590static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2591{
2592 struct Scsi_Host *shost = vport_to_shost(vport);
2593 struct fc_lport *n_port = shost_priv(shost);
2594 struct fcoe_port *port = lport_priv(n_port);
2595 struct fcoe_interface *fcoe = port->fcoe;
2596 struct net_device *netdev = fcoe->netdev;
2597 struct fc_lport *vn_port;
2598
2599 mutex_lock(&fcoe_config_mutex);
2600 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2601 mutex_unlock(&fcoe_config_mutex);
2602
2603 if (IS_ERR(vn_port)) {
2604 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2605 netdev->name);
2606 return -EIO;
2607 }
2608
2609 if (disabled) {
2610 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2611 } else {
2612 vn_port->boot_time = jiffies;
2613 fc_fabric_login(vn_port);
2614 fc_vport_setlink(vn_port);
2615 }
2616 return 0;
2617}
2618
2619/**
2620 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2621 * @vport: fc_vport object that is being destroyed
2622 *
2623 * Returns: 0 for success
2624 */
2625static int fcoe_vport_destroy(struct fc_vport *vport)
2626{
2627 struct Scsi_Host *shost = vport_to_shost(vport);
2628 struct fc_lport *n_port = shost_priv(shost);
2629 struct fc_lport *vn_port = vport->dd_data;
2630 struct fcoe_port *port = lport_priv(vn_port);
2631
2632 mutex_lock(&n_port->lp_mutex);
2633 list_del(&vn_port->list);
2634 mutex_unlock(&n_port->lp_mutex);
2635 schedule_work(&port->destroy_work);
2636 return 0;
2637}
2638
2639/**
2640 * fcoe_vport_disable() - change vport state
2641 * @vport: vport to bring online/offline
2642 * @disable: should the vport be disabled?
2643 */
2644static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2645{
2646 struct fc_lport *lport = vport->dd_data;
2647
2648 if (disable) {
2649 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2650 fc_fabric_logoff(lport);
2651 } else {
2652 lport->boot_time = jiffies;
2653 fc_fabric_login(lport);
2654 fc_vport_setlink(lport);
2655 }
2656
2657 return 0;
2658}
2659
Chris Leechdc8596d2009-11-03 11:47:18 -08002660/**
2661 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2662 * @vport: fc_vport with a new symbolic name string
2663 *
2664 * After generating a new symbolic name string, a new RSPN_ID request is
2665 * sent to the name server. There is no response handler, so if it fails
2666 * for some reason it will not be retried.
2667 */
2668static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2669{
2670 struct fc_lport *lport = vport->dd_data;
2671 struct fc_frame *fp;
2672 size_t len;
2673
2674 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2675 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2676 fcoe_netdev(lport)->name, vport->symbolic_name);
2677
2678 if (lport->state != LPORT_ST_READY)
2679 return;
2680
2681 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2682 fp = fc_frame_alloc(lport,
2683 sizeof(struct fc_ct_hdr) +
2684 sizeof(struct fc_ns_rspn) + len);
2685 if (!fp)
2686 return;
2687 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
Joe Eykholtb94f8952009-11-03 11:50:21 -08002688 NULL, NULL, 3 * lport->r_a_tov);
Chris Leechdc8596d2009-11-03 11:47:18 -08002689}
Yi Zoub84056b2009-11-20 14:55:19 -08002690
2691/**
2692 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2693 * @lport: the local port
2694 * @fc_lesb: the link error status block
2695 */
2696static void fcoe_get_lesb(struct fc_lport *lport,
2697 struct fc_els_lesb *fc_lesb)
2698{
2699 unsigned int cpu;
2700 u32 lfc, vlfc, mdac;
2701 struct fcoe_dev_stats *devst;
2702 struct fcoe_fc_els_lesb *lesb;
Eric Dumazet28172732010-07-07 14:58:56 -07002703 struct rtnl_link_stats64 temp;
Yi Zoub84056b2009-11-20 14:55:19 -08002704 struct net_device *netdev = fcoe_netdev(lport);
2705
2706 lfc = 0;
2707 vlfc = 0;
2708 mdac = 0;
2709 lesb = (struct fcoe_fc_els_lesb *)fc_lesb;
2710 memset(lesb, 0, sizeof(*lesb));
2711 for_each_possible_cpu(cpu) {
2712 devst = per_cpu_ptr(lport->dev_stats, cpu);
2713 lfc += devst->LinkFailureCount;
2714 vlfc += devst->VLinkFailureCount;
2715 mdac += devst->MissDiscAdvCount;
2716 }
2717 lesb->lesb_link_fail = htonl(lfc);
2718 lesb->lesb_vlink_fail = htonl(vlfc);
2719 lesb->lesb_miss_fka = htonl(mdac);
Eric Dumazet28172732010-07-07 14:58:56 -07002720 lesb->lesb_fcs_error = htonl(dev_get_stats(netdev, &temp)->rx_crc_errors);
Yi Zoub84056b2009-11-20 14:55:19 -08002721}
Joe Eykholt7d65b0d2010-03-12 16:08:02 -08002722
2723/**
2724 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2725 * @lport: the local port
2726 * @port_id: the port ID
2727 * @fp: the received frame, if any, that caused the port_id to be set.
2728 *
2729 * This routine handles the case where we received a FLOGI and are
2730 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2731 * so it can set the non-mapped mode and gateway address.
2732 *
2733 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2734 */
2735static void fcoe_set_port_id(struct fc_lport *lport,
2736 u32 port_id, struct fc_frame *fp)
2737{
2738 struct fcoe_port *port = lport_priv(lport);
2739 struct fcoe_interface *fcoe = port->fcoe;
2740
2741 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2742 fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp);
2743}