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-rw-r--r--drivers/scsi/fcoe/fcoe_sw.c561
1 files changed, 0 insertions, 561 deletions
diff --git a/drivers/scsi/fcoe/fcoe_sw.c b/drivers/scsi/fcoe/fcoe_sw.c
deleted file mode 100644
index 2bbbe3c0cc7b..000000000000
--- a/drivers/scsi/fcoe/fcoe_sw.c
+++ /dev/null
@@ -1,561 +0,0 @@
1/*
2 * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
3 *
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>
22#include <linux/kernel.h>
23#include <linux/pci.h>
24#include <linux/init.h>
25#include <linux/spinlock.h>
26#include <linux/netdevice.h>
27#include <linux/etherdevice.h>
28#include <linux/if_vlan.h>
29#include <net/rtnetlink.h>
30
31#include <scsi/fc/fc_els.h>
32#include <scsi/fc/fc_encaps.h>
33#include <scsi/fc/fc_fs.h>
34#include <scsi/scsi_transport.h>
35#include <scsi/scsi_transport_fc.h>
36
37#include <scsi/libfc.h>
38#include <scsi/libfcoe.h>
39#include <scsi/fc_transport_fcoe.h>
40
41#define FCOE_SW_VERSION "0.1"
42#define FCOE_SW_NAME "fcoesw"
43#define FCOE_SW_VENDOR "Open-FCoE.org"
44
45#define FCOE_MAX_LUN 255
46#define FCOE_MAX_FCP_TARGET 256
47
48#define FCOE_MAX_OUTSTANDING_COMMANDS 1024
49
50#define FCOE_MIN_XID 0x0001 /* the min xid supported by fcoe_sw */
51#define FCOE_MAX_XID 0x07ef /* the max xid supported by fcoe_sw */
52
53static struct scsi_transport_template *scsi_transport_fcoe_sw;
54
55struct fc_function_template fcoe_sw_transport_function = {
56 .show_host_node_name = 1,
57 .show_host_port_name = 1,
58 .show_host_supported_classes = 1,
59 .show_host_supported_fc4s = 1,
60 .show_host_active_fc4s = 1,
61 .show_host_maxframe_size = 1,
62
63 .show_host_port_id = 1,
64 .show_host_supported_speeds = 1,
65 .get_host_speed = fc_get_host_speed,
66 .show_host_speed = 1,
67 .show_host_port_type = 1,
68 .get_host_port_state = fc_get_host_port_state,
69 .show_host_port_state = 1,
70 .show_host_symbolic_name = 1,
71
72 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
73 .show_rport_maxframe_size = 1,
74 .show_rport_supported_classes = 1,
75
76 .show_host_fabric_name = 1,
77 .show_starget_node_name = 1,
78 .show_starget_port_name = 1,
79 .show_starget_port_id = 1,
80 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
81 .show_rport_dev_loss_tmo = 1,
82 .get_fc_host_stats = fc_get_host_stats,
83 .issue_fc_host_lip = fcoe_reset,
84
85 .terminate_rport_io = fc_rport_terminate_io,
86};
87
88static struct scsi_host_template fcoe_sw_shost_template = {
89 .module = THIS_MODULE,
90 .name = "FCoE Driver",
91 .proc_name = FCOE_SW_NAME,
92 .queuecommand = fc_queuecommand,
93 .eh_abort_handler = fc_eh_abort,
94 .eh_device_reset_handler = fc_eh_device_reset,
95 .eh_host_reset_handler = fc_eh_host_reset,
96 .slave_alloc = fc_slave_alloc,
97 .change_queue_depth = fc_change_queue_depth,
98 .change_queue_type = fc_change_queue_type,
99 .this_id = -1,
100 .cmd_per_lun = 32,
101 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
102 .use_clustering = ENABLE_CLUSTERING,
103 .sg_tablesize = SG_ALL,
104 .max_sectors = 0xffff,
105};
106
107/**
108 * fcoe_sw_lport_config() - sets up the fc_lport
109 * @lp: ptr to the fc_lport
110 * @shost: ptr to the parent scsi host
111 *
112 * Returns: 0 for success
113 */
114static int fcoe_sw_lport_config(struct fc_lport *lp)
115{
116 int i = 0;
117
118 lp->link_up = 0;
119 lp->qfull = 0;
120 lp->max_retry_count = 3;
121 lp->e_d_tov = 2 * 1000; /* FC-FS default */
122 lp->r_a_tov = 2 * 2 * 1000;
123 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
124 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
125
126 /*
127 * allocate per cpu stats block
128 */
129 for_each_online_cpu(i)
130 lp->dev_stats[i] = kzalloc(sizeof(struct fcoe_dev_stats),
131 GFP_KERNEL);
132
133 /* lport fc_lport related configuration */
134 fc_lport_config(lp);
135
136 /* offload related configuration */
137 lp->crc_offload = 0;
138 lp->seq_offload = 0;
139 lp->lro_enabled = 0;
140 lp->lro_xid = 0;
141 lp->lso_max = 0;
142
143 return 0;
144}
145
146/**
147 * fcoe_sw_netdev_config() - Set up netdev for SW FCoE
148 * @lp : ptr to the fc_lport
149 * @netdev : ptr to the associated netdevice struct
150 *
151 * Must be called after fcoe_sw_lport_config() as it will use lport mutex
152 *
153 * Returns : 0 for success
154 */
155static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev)
156{
157 u32 mfs;
158 u64 wwnn, wwpn;
159 struct fcoe_softc *fc;
160 u8 flogi_maddr[ETH_ALEN];
161
162 /* Setup lport private data to point to fcoe softc */
163 fc = lport_priv(lp);
164 fc->lp = lp;
165 fc->real_dev = netdev;
166 fc->phys_dev = netdev;
167
168 /* Require support for get_pauseparam ethtool op. */
169 if (netdev->priv_flags & IFF_802_1Q_VLAN)
170 fc->phys_dev = vlan_dev_real_dev(netdev);
171
172 /* Do not support for bonding device */
173 if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
174 (fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
175 (fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
176 return -EOPNOTSUPP;
177 }
178
179 /*
180 * Determine max frame size based on underlying device and optional
181 * user-configured limit. If the MFS is too low, fcoe_link_ok()
182 * will return 0, so do this first.
183 */
184 mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
185 sizeof(struct fcoe_crc_eof));
186 if (fc_set_mfs(lp, mfs))
187 return -EINVAL;
188
189 if (!fcoe_link_ok(lp))
190 lp->link_up = 1;
191
192 /* offload features support */
193 if (fc->real_dev->features & NETIF_F_SG)
194 lp->sg_supp = 1;
195
196#ifdef NETIF_F_FCOE_CRC
197 if (netdev->features & NETIF_F_FCOE_CRC) {
198 lp->crc_offload = 1;
199 printk(KERN_DEBUG "fcoe:%s supports FCCRC offload\n",
200 netdev->name);
201 }
202#endif
203#ifdef NETIF_F_FSO
204 if (netdev->features & NETIF_F_FSO) {
205 lp->seq_offload = 1;
206 lp->lso_max = netdev->gso_max_size;
207 printk(KERN_DEBUG "fcoe:%s supports LSO for max len 0x%x\n",
208 netdev->name, lp->lso_max);
209 }
210#endif
211 if (netdev->fcoe_ddp_xid) {
212 lp->lro_enabled = 1;
213 lp->lro_xid = netdev->fcoe_ddp_xid;
214 printk(KERN_DEBUG "fcoe:%s supports LRO for max xid 0x%x\n",
215 netdev->name, lp->lro_xid);
216 }
217 skb_queue_head_init(&fc->fcoe_pending_queue);
218 fc->fcoe_pending_queue_active = 0;
219
220 /* setup Source Mac Address */
221 memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr,
222 fc->real_dev->addr_len);
223
224 wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
225 fc_set_wwnn(lp, wwnn);
226 /* XXX - 3rd arg needs to be vlan id */
227 wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
228 fc_set_wwpn(lp, wwpn);
229
230 /*
231 * Add FCoE MAC address as second unicast MAC address
232 * or enter promiscuous mode if not capable of listening
233 * for multiple unicast MACs.
234 */
235 rtnl_lock();
236 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
237 dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
238 rtnl_unlock();
239
240 /*
241 * setup the receive function from ethernet driver
242 * on the ethertype for the given device
243 */
244 fc->fcoe_packet_type.func = fcoe_rcv;
245 fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
246 fc->fcoe_packet_type.dev = fc->real_dev;
247 dev_add_pack(&fc->fcoe_packet_type);
248
249 return 0;
250}
251
252/**
253 * fcoe_sw_shost_config() - Sets up fc_lport->host
254 * @lp : ptr to the fc_lport
255 * @shost : ptr to the associated scsi host
256 * @dev : device associated to scsi host
257 *
258 * Must be called after fcoe_sw_lport_config() and fcoe_sw_netdev_config()
259 *
260 * Returns : 0 for success
261 */
262static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
263 struct device *dev)
264{
265 int rc = 0;
266
267 /* lport scsi host config */
268 lp->host = shost;
269
270 lp->host->max_lun = FCOE_MAX_LUN;
271 lp->host->max_id = FCOE_MAX_FCP_TARGET;
272 lp->host->max_channel = 0;
273 lp->host->transportt = scsi_transport_fcoe_sw;
274
275 /* add the new host to the SCSI-ml */
276 rc = scsi_add_host(lp->host, dev);
277 if (rc) {
278 FC_DBG("fcoe_sw_shost_config:error on scsi_add_host\n");
279 return rc;
280 }
281 sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
282 FCOE_SW_NAME, FCOE_SW_VERSION,
283 fcoe_netdev(lp)->name);
284
285 return 0;
286}
287
288/**
289 * fcoe_sw_em_config() - allocates em for this lport
290 * @lp: the port that em is to allocated for
291 *
292 * Returns : 0 on success
293 */
294static inline int fcoe_sw_em_config(struct fc_lport *lp)
295{
296 BUG_ON(lp->emp);
297
298 lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
299 FCOE_MIN_XID, FCOE_MAX_XID);
300 if (!lp->emp)
301 return -ENOMEM;
302
303 return 0;
304}
305
306/**
307 * fcoe_sw_destroy() - FCoE software HBA tear-down function
308 * @netdev: ptr to the associated net_device
309 *
310 * Returns: 0 if link is OK for use by FCoE.
311 */
312static int fcoe_sw_destroy(struct net_device *netdev)
313{
314 int cpu;
315 struct fc_lport *lp = NULL;
316 struct fcoe_softc *fc;
317 u8 flogi_maddr[ETH_ALEN];
318
319 BUG_ON(!netdev);
320
321 printk(KERN_DEBUG "fcoe_sw_destroy:interface on %s\n",
322 netdev->name);
323
324 lp = fcoe_hostlist_lookup(netdev);
325 if (!lp)
326 return -ENODEV;
327
328 fc = lport_priv(lp);
329
330 /* Logout of the fabric */
331 fc_fabric_logoff(lp);
332
333 /* Remove the instance from fcoe's list */
334 fcoe_hostlist_remove(lp);
335
336 /* Don't listen for Ethernet packets anymore */
337 dev_remove_pack(&fc->fcoe_packet_type);
338
339 /* Cleanup the fc_lport */
340 fc_lport_destroy(lp);
341 fc_fcp_destroy(lp);
342
343 /* Detach from the scsi-ml */
344 fc_remove_host(lp->host);
345 scsi_remove_host(lp->host);
346
347 /* There are no more rports or I/O, free the EM */
348 if (lp->emp)
349 fc_exch_mgr_free(lp->emp);
350
351 /* Delete secondary MAC addresses */
352 rtnl_lock();
353 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
354 dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
355 if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
356 dev_unicast_delete(fc->real_dev, fc->data_src_addr, ETH_ALEN);
357 rtnl_unlock();
358
359 /* Free the per-CPU revieve threads */
360 fcoe_percpu_clean(lp);
361
362 /* Free existing skbs */
363 fcoe_clean_pending_queue(lp);
364
365 /* Free memory used by statistical counters */
366 for_each_online_cpu(cpu)
367 kfree(lp->dev_stats[cpu]);
368
369 /* Release the net_device and Scsi_Host */
370 dev_put(fc->real_dev);
371 scsi_host_put(lp->host);
372
373 return 0;
374}
375
376/*
377 * fcoe_sw_ddp_setup - calls LLD's ddp_setup through net_device
378 * @lp: the corresponding fc_lport
379 * @xid: the exchange id for this ddp transfer
380 * @sgl: the scatterlist describing this transfer
381 * @sgc: number of sg items
382 *
383 * Returns : 0 no ddp
384 */
385static int fcoe_sw_ddp_setup(struct fc_lport *lp, u16 xid,
386 struct scatterlist *sgl, unsigned int sgc)
387{
388 struct net_device *n = fcoe_netdev(lp);
389
390 if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
391 return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
392
393 return 0;
394}
395
396/*
397 * fcoe_sw_ddp_done - calls LLD's ddp_done through net_device
398 * @lp: the corresponding fc_lport
399 * @xid: the exchange id for this ddp transfer
400 *
401 * Returns : the length of data that have been completed by ddp
402 */
403static int fcoe_sw_ddp_done(struct fc_lport *lp, u16 xid)
404{
405 struct net_device *n = fcoe_netdev(lp);
406
407 if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
408 return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
409 return 0;
410}
411
412static struct libfc_function_template fcoe_sw_libfc_fcn_templ = {
413 .frame_send = fcoe_xmit,
414 .ddp_setup = fcoe_sw_ddp_setup,
415 .ddp_done = fcoe_sw_ddp_done,
416};
417
418/**
419 * fcoe_sw_create() - this function creates the fcoe interface
420 * @netdev: pointer the associated netdevice
421 *
422 * Creates fc_lport struct and scsi_host for lport, configures lport
423 * and starts fabric login.
424 *
425 * Returns : 0 on success
426 */
427static int fcoe_sw_create(struct net_device *netdev)
428{
429 int rc;
430 struct fc_lport *lp = NULL;
431 struct fcoe_softc *fc;
432 struct Scsi_Host *shost;
433
434 BUG_ON(!netdev);
435
436 printk(KERN_DEBUG "fcoe_sw_create:interface on %s\n",
437 netdev->name);
438
439 lp = fcoe_hostlist_lookup(netdev);
440 if (lp)
441 return -EEXIST;
442
443 shost = fcoe_host_alloc(&fcoe_sw_shost_template,
444 sizeof(struct fcoe_softc));
445 if (!shost) {
446 FC_DBG("Could not allocate host structure\n");
447 return -ENOMEM;
448 }
449 lp = shost_priv(shost);
450 fc = lport_priv(lp);
451
452 /* configure fc_lport, e.g., em */
453 rc = fcoe_sw_lport_config(lp);
454 if (rc) {
455 FC_DBG("Could not configure lport\n");
456 goto out_host_put;
457 }
458
459 /* configure lport network properties */
460 rc = fcoe_sw_netdev_config(lp, netdev);
461 if (rc) {
462 FC_DBG("Could not configure netdev for lport\n");
463 goto out_host_put;
464 }
465
466 /* configure lport scsi host properties */
467 rc = fcoe_sw_shost_config(lp, shost, &netdev->dev);
468 if (rc) {
469 FC_DBG("Could not configure shost for lport\n");
470 goto out_host_put;
471 }
472
473 /* lport exch manager allocation */
474 rc = fcoe_sw_em_config(lp);
475 if (rc) {
476 FC_DBG("Could not configure em for lport\n");
477 goto out_host_put;
478 }
479
480 /* Initialize the library */
481 rc = fcoe_libfc_config(lp, &fcoe_sw_libfc_fcn_templ);
482 if (rc) {
483 FC_DBG("Could not configure libfc for lport!\n");
484 goto out_lp_destroy;
485 }
486
487 /* add to lports list */
488 fcoe_hostlist_add(lp);
489
490 lp->boot_time = jiffies;
491
492 fc_fabric_login(lp);
493
494 dev_hold(netdev);
495
496 return rc;
497
498out_lp_destroy:
499 fc_exch_mgr_free(lp->emp); /* Free the EM */
500out_host_put:
501 scsi_host_put(lp->host);
502 return rc;
503}
504
505/**
506 * fcoe_sw_match() - The FCoE SW transport match function
507 *
508 * Returns : false always
509 */
510static bool fcoe_sw_match(struct net_device *netdev)
511{
512 /* FIXME - for sw transport, always return false */
513 return false;
514}
515
516/* the sw hba fcoe transport */
517struct fcoe_transport fcoe_sw_transport = {
518 .name = "fcoesw",
519 .create = fcoe_sw_create,
520 .destroy = fcoe_sw_destroy,
521 .match = fcoe_sw_match,
522 .vendor = 0x0,
523 .device = 0xffff,
524};
525
526/**
527 * fcoe_sw_init() - Registers fcoe_sw_transport
528 *
529 * Returns : 0 on success
530 */
531int __init fcoe_sw_init(void)
532{
533 /* attach to scsi transport */
534 scsi_transport_fcoe_sw =
535 fc_attach_transport(&fcoe_sw_transport_function);
536
537 if (!scsi_transport_fcoe_sw) {
538 printk(KERN_ERR "fcoe_sw_init:fc_attach_transport() failed\n");
539 return -ENODEV;
540 }
541
542 mutex_init(&fcoe_sw_transport.devlock);
543 INIT_LIST_HEAD(&fcoe_sw_transport.devlist);
544
545 /* register sw transport */
546 fcoe_transport_register(&fcoe_sw_transport);
547 return 0;
548}
549
550/**
551 * fcoe_sw_exit() - Unregisters fcoe_sw_transport
552 *
553 * Returns : 0 on success
554 */
555int __exit fcoe_sw_exit(void)
556{
557 /* dettach the transport */
558 fc_release_transport(scsi_transport_fcoe_sw);
559 fcoe_transport_unregister(&fcoe_sw_transport);
560 return 0;
561}
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