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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / scsi / bnx2fc / bnx2fc_fcoe.c
blob820a1840c3f755b5c90fd66922e2da5f8d729dab
1 /* bnx2fc_fcoe.c: Broadcom NetXtreme II Linux FCoE offload driver.
2 * This file contains the code that interacts with libfc, libfcoe,
3 * cnic modules to create FCoE instances, send/receive non-offloaded
4 * FIP/FCoE packets, listen to link events etc.
5 *
6 * Copyright (c) 2008 - 2011 Broadcom Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation.
11 *
12 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
13 */
14
15 #include "bnx2fc.h"
16
17 static struct list_head adapter_list;
18 static struct list_head if_list;
19 static u32 adapter_count;
20 static DEFINE_MUTEX(bnx2fc_dev_lock);
21 DEFINE_PER_CPU(struct bnx2fc_percpu_s, bnx2fc_percpu);
22
23 #define DRV_MODULE_NAME "bnx2fc"
24 #define DRV_MODULE_VERSION BNX2FC_VERSION
25 #define DRV_MODULE_RELDATE "Jun 23, 2011"
26
27
28 static char version[] __devinitdata =
29 "Broadcom NetXtreme II FCoE Driver " DRV_MODULE_NAME \
30 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
31
32
33 MODULE_AUTHOR("Bhanu Prakash Gollapudi <bprakash@broadcom.com>");
34 MODULE_DESCRIPTION("Broadcom NetXtreme II BCM57710 FCoE Driver");
35 MODULE_LICENSE("GPL");
36 MODULE_VERSION(DRV_MODULE_VERSION);
37
38 #define BNX2FC_MAX_QUEUE_DEPTH 256
39 #define BNX2FC_MIN_QUEUE_DEPTH 32
40 #define FCOE_WORD_TO_BYTE 4
41
42 static struct scsi_transport_template *bnx2fc_transport_template;
43 static struct scsi_transport_template *bnx2fc_vport_xport_template;
44
45 struct workqueue_struct *bnx2fc_wq;
46
47 /* bnx2fc structure needs only one instance of the fcoe_percpu_s structure.
48 * Here the io threads are per cpu but the l2 thread is just one
49 */
50 struct fcoe_percpu_s bnx2fc_global;
51 DEFINE_SPINLOCK(bnx2fc_global_lock);
52
53 static struct cnic_ulp_ops bnx2fc_cnic_cb;
54 static struct libfc_function_template bnx2fc_libfc_fcn_templ;
55 static struct scsi_host_template bnx2fc_shost_template;
56 static struct fc_function_template bnx2fc_transport_function;
57 static struct fc_function_template bnx2fc_vport_xport_function;
58 static int bnx2fc_create(struct net_device *netdev, enum fip_state fip_mode);
59 static int bnx2fc_destroy(struct net_device *net_device);
60 static int bnx2fc_enable(struct net_device *netdev);
61 static int bnx2fc_disable(struct net_device *netdev);
62
63 static void bnx2fc_recv_frame(struct sk_buff *skb);
64
65 static void bnx2fc_start_disc(struct bnx2fc_interface *interface);
66 static int bnx2fc_shost_config(struct fc_lport *lport, struct device *dev);
67 static int bnx2fc_net_config(struct fc_lport *lp);
68 static int bnx2fc_lport_config(struct fc_lport *lport);
69 static int bnx2fc_em_config(struct fc_lport *lport);
70 static int bnx2fc_bind_adapter_devices(struct bnx2fc_hba *hba);
71 static void bnx2fc_unbind_adapter_devices(struct bnx2fc_hba *hba);
72 static int bnx2fc_bind_pcidev(struct bnx2fc_hba *hba);
73 static void bnx2fc_unbind_pcidev(struct bnx2fc_hba *hba);
74 static struct fc_lport *bnx2fc_if_create(struct bnx2fc_interface *interface,
75 struct device *parent, int npiv);
76 static void bnx2fc_destroy_work(struct work_struct *work);
77
78 static struct bnx2fc_hba *bnx2fc_hba_lookup(struct net_device *phys_dev);
79 static struct bnx2fc_interface *bnx2fc_interface_lookup(struct net_device
80 *phys_dev);
81 static struct bnx2fc_hba *bnx2fc_find_hba_for_cnic(struct cnic_dev *cnic);
82
83 static int bnx2fc_fw_init(struct bnx2fc_hba *hba);
84 static void bnx2fc_fw_destroy(struct bnx2fc_hba *hba);
85
86 static void bnx2fc_port_shutdown(struct fc_lport *lport);
87 static void bnx2fc_stop(struct bnx2fc_interface *interface);
88 static int __init bnx2fc_mod_init(void);
89 static void __exit bnx2fc_mod_exit(void);
90
91 unsigned int bnx2fc_debug_level;
92 module_param_named(debug_logging, bnx2fc_debug_level, int, S_IRUGO|S_IWUSR);
93
94 static int bnx2fc_cpu_callback(struct notifier_block *nfb,
95 unsigned long action, void *hcpu);
96 /* notification function for CPU hotplug events */
97 static struct notifier_block bnx2fc_cpu_notifier = {
98 .notifier_call = bnx2fc_cpu_callback,
99 };
100
101 static void bnx2fc_clean_rx_queue(struct fc_lport *lp)
102 {
103 struct fcoe_percpu_s *bg;
104 struct fcoe_rcv_info *fr;
105 struct sk_buff_head *list;
106 struct sk_buff *skb, *next;
107 struct sk_buff *head;
108
109 bg = &bnx2fc_global;
110 spin_lock_bh(&bg->fcoe_rx_list.lock);
111 list = &bg->fcoe_rx_list;
112 head = list->next;
113 for (skb = head; skb != (struct sk_buff *)list;
114 skb = next) {
115 next = skb->next;
116 fr = fcoe_dev_from_skb(skb);
117 if (fr->fr_dev == lp) {
118 __skb_unlink(skb, list);
119 kfree_skb(skb);
120 }
121 }
122 spin_unlock_bh(&bg->fcoe_rx_list.lock);
123 }
124
125 int bnx2fc_get_paged_crc_eof(struct sk_buff *skb, int tlen)
126 {
127 int rc;
128 spin_lock(&bnx2fc_global_lock);
129 rc = fcoe_get_paged_crc_eof(skb, tlen, &bnx2fc_global);
130 spin_unlock(&bnx2fc_global_lock);
131
132 return rc;
133 }
134
135 static void bnx2fc_abort_io(struct fc_lport *lport)
136 {
137 /*
138 * This function is no-op for bnx2fc, but we do
139 * not want to leave it as NULL either, as libfc
140 * can call the default function which is
141 * fc_fcp_abort_io.
142 */
143 }
144
145 static void bnx2fc_cleanup(struct fc_lport *lport)
146 {
147 struct fcoe_port *port = lport_priv(lport);
148 struct bnx2fc_interface *interface = port->priv;
149 struct bnx2fc_hba *hba = interface->hba;
150 struct bnx2fc_rport *tgt;
151 int i;
152
153 BNX2FC_MISC_DBG("Entered %s\n", __func__);
154 mutex_lock(&hba->hba_mutex);
155 spin_lock_bh(&hba->hba_lock);
156 for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
157 tgt = hba->tgt_ofld_list[i];
158 if (tgt) {
159 /* Cleanup IOs belonging to requested vport */
160 if (tgt->port == port) {
161 spin_unlock_bh(&hba->hba_lock);
162 BNX2FC_TGT_DBG(tgt, "flush/cleanup\n");
163 bnx2fc_flush_active_ios(tgt);
164 spin_lock_bh(&hba->hba_lock);
165 }
166 }
167 }
168 spin_unlock_bh(&hba->hba_lock);
169 mutex_unlock(&hba->hba_mutex);
170 }
171
172 static int bnx2fc_xmit_l2_frame(struct bnx2fc_rport *tgt,
173 struct fc_frame *fp)
174 {
175 struct fc_rport_priv *rdata = tgt->rdata;
176 struct fc_frame_header *fh;
177 int rc = 0;
178
179 fh = fc_frame_header_get(fp);
180 BNX2FC_TGT_DBG(tgt, "Xmit L2 frame rport = 0x%x, oxid = 0x%x, "
181 "r_ctl = 0x%x\n", rdata->ids.port_id,
182 ntohs(fh->fh_ox_id), fh->fh_r_ctl);
183 if ((fh->fh_type == FC_TYPE_ELS) &&
184 (fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
185
186 switch (fc_frame_payload_op(fp)) {
187 case ELS_ADISC:
188 rc = bnx2fc_send_adisc(tgt, fp);
189 break;
190 case ELS_LOGO:
191 rc = bnx2fc_send_logo(tgt, fp);
192 break;
193 case ELS_RLS:
194 rc = bnx2fc_send_rls(tgt, fp);
195 break;
196 default:
197 break;
198 }
199 } else if ((fh->fh_type == FC_TYPE_BLS) &&
200 (fh->fh_r_ctl == FC_RCTL_BA_ABTS))
201 BNX2FC_TGT_DBG(tgt, "ABTS frame\n");
202 else {
203 BNX2FC_TGT_DBG(tgt, "Send L2 frame type 0x%x "
204 "rctl 0x%x thru non-offload path\n",
205 fh->fh_type, fh->fh_r_ctl);
206 return -ENODEV;
207 }
208 if (rc)
209 return -ENOMEM;
210 else
211 return 0;
212 }
213
214 /**
215 * bnx2fc_xmit - bnx2fc's FCoE frame transmit function
216 *
217 * @lport: the associated local port
218 * @fp: the fc_frame to be transmitted
219 */
220 static int bnx2fc_xmit(struct fc_lport *lport, struct fc_frame *fp)
221 {
222 struct ethhdr *eh;
223 struct fcoe_crc_eof *cp;
224 struct sk_buff *skb;
225 struct fc_frame_header *fh;
226 struct bnx2fc_interface *interface;
227 struct bnx2fc_hba *hba;
228 struct fcoe_port *port;
229 struct fcoe_hdr *hp;
230 struct bnx2fc_rport *tgt;
231 struct fcoe_dev_stats *stats;
232 u8 sof, eof;
233 u32 crc;
234 unsigned int hlen, tlen, elen;
235 int wlen, rc = 0;
236
237 port = (struct fcoe_port *)lport_priv(lport);
238 interface = port->priv;
239 hba = interface->hba;
240
241 fh = fc_frame_header_get(fp);
242
243 skb = fp_skb(fp);
244 if (!lport->link_up) {
245 BNX2FC_HBA_DBG(lport, "bnx2fc_xmit link down\n");
246 kfree_skb(skb);
247 return 0;
248 }
249
250 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
251 if (!interface->ctlr.sel_fcf) {
252 BNX2FC_HBA_DBG(lport, "FCF not selected yet!\n");
253 kfree_skb(skb);
254 return -EINVAL;
255 }
256 if (fcoe_ctlr_els_send(&interface->ctlr, lport, skb))
257 return 0;
258 }
259
260 sof = fr_sof(fp);
261 eof = fr_eof(fp);
262
263 /*
264 * Snoop the frame header to check if the frame is for
265 * an offloaded session
266 */
267 /*
268 * tgt_ofld_list access is synchronized using
269 * both hba mutex and hba lock. Atleast hba mutex or
270 * hba lock needs to be held for read access.
271 */
272
273 spin_lock_bh(&hba->hba_lock);
274 tgt = bnx2fc_tgt_lookup(port, ntoh24(fh->fh_d_id));
275 if (tgt && (test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
276 /* This frame is for offloaded session */
277 BNX2FC_HBA_DBG(lport, "xmit: Frame is for offloaded session "
278 "port_id = 0x%x\n", ntoh24(fh->fh_d_id));
279 spin_unlock_bh(&hba->hba_lock);
280 rc = bnx2fc_xmit_l2_frame(tgt, fp);
281 if (rc != -ENODEV) {
282 kfree_skb(skb);
283 return rc;
284 }
285 } else {
286 spin_unlock_bh(&hba->hba_lock);
287 }
288
289 elen = sizeof(struct ethhdr);
290 hlen = sizeof(struct fcoe_hdr);
291 tlen = sizeof(struct fcoe_crc_eof);
292 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
293
294 skb->ip_summed = CHECKSUM_NONE;
295 crc = fcoe_fc_crc(fp);
296
297 /* copy port crc and eof to the skb buff */
298 if (skb_is_nonlinear(skb)) {
299 skb_frag_t *frag;
300 if (bnx2fc_get_paged_crc_eof(skb, tlen)) {
301 kfree_skb(skb);
302 return -ENOMEM;
303 }
304 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
305 cp = kmap_atomic(skb_frag_page(frag), KM_SKB_DATA_SOFTIRQ)
306 + frag->page_offset;
307 } else {
308 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
309 }
310
311 memset(cp, 0, sizeof(*cp));
312 cp->fcoe_eof = eof;
313 cp->fcoe_crc32 = cpu_to_le32(~crc);
314 if (skb_is_nonlinear(skb)) {
315 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
316 cp = NULL;
317 }
318
319 /* adjust skb network/transport offsets to match mac/fcoe/port */
320 skb_push(skb, elen + hlen);
321 skb_reset_mac_header(skb);
322 skb_reset_network_header(skb);
323 skb->mac_len = elen;
324 skb->protocol = htons(ETH_P_FCOE);
325 skb->dev = interface->netdev;
326
327 /* fill up mac and fcoe headers */
328 eh = eth_hdr(skb);
329 eh->h_proto = htons(ETH_P_FCOE);
330 if (interface->ctlr.map_dest)
331 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
332 else
333 /* insert GW address */
334 memcpy(eh->h_dest, interface->ctlr.dest_addr, ETH_ALEN);
335
336 if (unlikely(interface->ctlr.flogi_oxid != FC_XID_UNKNOWN))
337 memcpy(eh->h_source, interface->ctlr.ctl_src_addr, ETH_ALEN);
338 else
339 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
340
341 hp = (struct fcoe_hdr *)(eh + 1);
342 memset(hp, 0, sizeof(*hp));
343 if (FC_FCOE_VER)
344 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
345 hp->fcoe_sof = sof;
346
347 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
348 if (lport->seq_offload && fr_max_payload(fp)) {
349 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
350 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
351 } else {
352 skb_shinfo(skb)->gso_type = 0;
353 skb_shinfo(skb)->gso_size = 0;
354 }
355
356 /*update tx stats */
357 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
358 stats->TxFrames++;
359 stats->TxWords += wlen;
360 put_cpu();
361
362 /* send down to lld */
363 fr_dev(fp) = lport;
364 if (port->fcoe_pending_queue.qlen)
365 fcoe_check_wait_queue(lport, skb);
366 else if (fcoe_start_io(skb))
367 fcoe_check_wait_queue(lport, skb);
368
369 return 0;
370 }
371
372 /**
373 * bnx2fc_rcv - This is bnx2fc's receive function called by NET_RX_SOFTIRQ
374 *
375 * @skb: the receive socket buffer
376 * @dev: associated net device
377 * @ptype: context
378 * @olddev: last device
379 *
380 * This function receives the packet and builds FC frame and passes it up
381 */
382 static int bnx2fc_rcv(struct sk_buff *skb, struct net_device *dev,
383 struct packet_type *ptype, struct net_device *olddev)
384 {
385 struct fc_lport *lport;
386 struct bnx2fc_interface *interface;
387 struct fc_frame_header *fh;
388 struct fcoe_rcv_info *fr;
389 struct fcoe_percpu_s *bg;
390 unsigned short oxid;
391
392 interface = container_of(ptype, struct bnx2fc_interface,
393 fcoe_packet_type);
394 lport = interface->ctlr.lp;
395
396 if (unlikely(lport == NULL)) {
397 printk(KERN_ERR PFX "bnx2fc_rcv: lport is NULL\n");
398 goto err;
399 }
400
401 if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
402 printk(KERN_ERR PFX "bnx2fc_rcv: Wrong FC type frame\n");
403 goto err;
404 }
405
406 /*
407 * Check for minimum frame length, and make sure required FCoE
408 * and FC headers are pulled into the linear data area.
409 */
410 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
411 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
412 goto err;
413
414 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
415 fh = (struct fc_frame_header *) skb_transport_header(skb);
416
417 oxid = ntohs(fh->fh_ox_id);
418
419 fr = fcoe_dev_from_skb(skb);
420 fr->fr_dev = lport;
421
422 bg = &bnx2fc_global;
423 spin_lock_bh(&bg->fcoe_rx_list.lock);
424
425 __skb_queue_tail(&bg->fcoe_rx_list, skb);
426 if (bg->fcoe_rx_list.qlen == 1)
427 wake_up_process(bg->thread);
428
429 spin_unlock_bh(&bg->fcoe_rx_list.lock);
430
431 return 0;
432 err:
433 kfree_skb(skb);
434 return -1;
435 }
436
437 static int bnx2fc_l2_rcv_thread(void *arg)
438 {
439 struct fcoe_percpu_s *bg = arg;
440 struct sk_buff *skb;
441
442 set_user_nice(current, -20);
443 set_current_state(TASK_INTERRUPTIBLE);
444 while (!kthread_should_stop()) {
445 schedule();
446 spin_lock_bh(&bg->fcoe_rx_list.lock);
447 while ((skb = __skb_dequeue(&bg->fcoe_rx_list)) != NULL) {
448 spin_unlock_bh(&bg->fcoe_rx_list.lock);
449 bnx2fc_recv_frame(skb);
450 spin_lock_bh(&bg->fcoe_rx_list.lock);
451 }
452 __set_current_state(TASK_INTERRUPTIBLE);
453 spin_unlock_bh(&bg->fcoe_rx_list.lock);
454 }
455 __set_current_state(TASK_RUNNING);
456 return 0;
457 }
458
459
460 static void bnx2fc_recv_frame(struct sk_buff *skb)
461 {
462 u32 fr_len;
463 struct fc_lport *lport;
464 struct fcoe_rcv_info *fr;
465 struct fcoe_dev_stats *stats;
466 struct fc_frame_header *fh;
467 struct fcoe_crc_eof crc_eof;
468 struct fc_frame *fp;
469 struct fc_lport *vn_port;
470 struct fcoe_port *port;
471 u8 *mac = NULL;
472 u8 *dest_mac = NULL;
473 struct fcoe_hdr *hp;
474
475 fr = fcoe_dev_from_skb(skb);
476 lport = fr->fr_dev;
477 if (unlikely(lport == NULL)) {
478 printk(KERN_ERR PFX "Invalid lport struct\n");
479 kfree_skb(skb);
480 return;
481 }
482
483 if (skb_is_nonlinear(skb))
484 skb_linearize(skb);
485 mac = eth_hdr(skb)->h_source;
486 dest_mac = eth_hdr(skb)->h_dest;
487
488 /* Pull the header */
489 hp = (struct fcoe_hdr *) skb_network_header(skb);
490 fh = (struct fc_frame_header *) skb_transport_header(skb);
491 skb_pull(skb, sizeof(struct fcoe_hdr));
492 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
493
494 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
495 stats->RxFrames++;
496 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
497
498 fp = (struct fc_frame *)skb;
499 fc_frame_init(fp);
500 fr_dev(fp) = lport;
501 fr_sof(fp) = hp->fcoe_sof;
502 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
503 put_cpu();
504 kfree_skb(skb);
505 return;
506 }
507 fr_eof(fp) = crc_eof.fcoe_eof;
508 fr_crc(fp) = crc_eof.fcoe_crc32;
509 if (pskb_trim(skb, fr_len)) {
510 put_cpu();
511 kfree_skb(skb);
512 return;
513 }
514
515 fh = fc_frame_header_get(fp);
516
517 vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
518 if (vn_port) {
519 port = lport_priv(vn_port);
520 if (compare_ether_addr(port->data_src_addr, dest_mac)
521 != 0) {
522 BNX2FC_HBA_DBG(lport, "fpma mismatch\n");
523 put_cpu();
524 kfree_skb(skb);
525 return;
526 }
527 }
528 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
529 fh->fh_type == FC_TYPE_FCP) {
530 /* Drop FCP data. We dont this in L2 path */
531 put_cpu();
532 kfree_skb(skb);
533 return;
534 }
535 if (fh->fh_r_ctl == FC_RCTL_ELS_REQ &&
536 fh->fh_type == FC_TYPE_ELS) {
537 switch (fc_frame_payload_op(fp)) {
538 case ELS_LOGO:
539 if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
540 /* drop non-FIP LOGO */
541 put_cpu();
542 kfree_skb(skb);
543 return;
544 }
545 break;
546 }
547 }
548 if (le32_to_cpu(fr_crc(fp)) !=
549 ~crc32(~0, skb->data, fr_len)) {
550 if (stats->InvalidCRCCount < 5)
551 printk(KERN_WARNING PFX "dropping frame with "
552 "CRC error\n");
553 stats->InvalidCRCCount++;
554 put_cpu();
555 kfree_skb(skb);
556 return;
557 }
558 put_cpu();
559 fc_exch_recv(lport, fp);
560 }
561
562 /**
563 * bnx2fc_percpu_io_thread - thread per cpu for ios
564 *
565 * @arg: ptr to bnx2fc_percpu_info structure
566 */
567 int bnx2fc_percpu_io_thread(void *arg)
568 {
569 struct bnx2fc_percpu_s *p = arg;
570 struct bnx2fc_work *work, *tmp;
571 LIST_HEAD(work_list);
572
573 set_user_nice(current, -20);
574 set_current_state(TASK_INTERRUPTIBLE);
575 while (!kthread_should_stop()) {
576 schedule();
577 spin_lock_bh(&p->fp_work_lock);
578 while (!list_empty(&p->work_list)) {
579 list_splice_init(&p->work_list, &work_list);
580 spin_unlock_bh(&p->fp_work_lock);
581
582 list_for_each_entry_safe(work, tmp, &work_list, list) {
583 list_del_init(&work->list);
584 bnx2fc_process_cq_compl(work->tgt, work->wqe);
585 kfree(work);
586 }
587
588 spin_lock_bh(&p->fp_work_lock);
589 }
590 __set_current_state(TASK_INTERRUPTIBLE);
591 spin_unlock_bh(&p->fp_work_lock);
592 }
593 __set_current_state(TASK_RUNNING);
594
595 return 0;
596 }
597
598 static struct fc_host_statistics *bnx2fc_get_host_stats(struct Scsi_Host *shost)
599 {
600 struct fc_host_statistics *bnx2fc_stats;
601 struct fc_lport *lport = shost_priv(shost);
602 struct fcoe_port *port = lport_priv(lport);
603 struct bnx2fc_interface *interface = port->priv;
604 struct bnx2fc_hba *hba = interface->hba;
605 struct fcoe_statistics_params *fw_stats;
606 int rc = 0;
607
608 fw_stats = (struct fcoe_statistics_params *)hba->stats_buffer;
609 if (!fw_stats)
610 return NULL;
611
612 bnx2fc_stats = fc_get_host_stats(shost);
613
614 init_completion(&hba->stat_req_done);
615 if (bnx2fc_send_stat_req(hba))
616 return bnx2fc_stats;
617 rc = wait_for_completion_timeout(&hba->stat_req_done, (2 * HZ));
618 if (!rc) {
619 BNX2FC_HBA_DBG(lport, "FW stat req timed out\n");
620 return bnx2fc_stats;
621 }
622 bnx2fc_stats->invalid_crc_count += fw_stats->rx_stat2.fc_crc_cnt;
623 bnx2fc_stats->tx_frames += fw_stats->tx_stat.fcoe_tx_pkt_cnt;
624 bnx2fc_stats->tx_words += (fw_stats->tx_stat.fcoe_tx_byte_cnt) / 4;
625 bnx2fc_stats->rx_frames += fw_stats->rx_stat0.fcoe_rx_pkt_cnt;
626 bnx2fc_stats->rx_words += (fw_stats->rx_stat0.fcoe_rx_byte_cnt) / 4;
627
628 bnx2fc_stats->dumped_frames = 0;
629 bnx2fc_stats->lip_count = 0;
630 bnx2fc_stats->nos_count = 0;
631 bnx2fc_stats->loss_of_sync_count = 0;
632 bnx2fc_stats->loss_of_signal_count = 0;
633 bnx2fc_stats->prim_seq_protocol_err_count = 0;
634
635 return bnx2fc_stats;
636 }
637
638 static int bnx2fc_shost_config(struct fc_lport *lport, struct device *dev)
639 {
640 struct fcoe_port *port = lport_priv(lport);
641 struct bnx2fc_interface *interface = port->priv;
642 struct Scsi_Host *shost = lport->host;
643 int rc = 0;
644
645 shost->max_cmd_len = BNX2FC_MAX_CMD_LEN;
646 shost->max_lun = BNX2FC_MAX_LUN;
647 shost->max_id = BNX2FC_MAX_FCP_TGT;
648 shost->max_channel = 0;
649 if (lport->vport)
650 shost->transportt = bnx2fc_vport_xport_template;
651 else
652 shost->transportt = bnx2fc_transport_template;
653
654 /* Add the new host to SCSI-ml */
655 rc = scsi_add_host(lport->host, dev);
656 if (rc) {
657 printk(KERN_ERR PFX "Error on scsi_add_host\n");
658 return rc;
659 }
660 if (!lport->vport)
661 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
662 sprintf(fc_host_symbolic_name(lport->host), "%s v%s over %s",
663 BNX2FC_NAME, BNX2FC_VERSION,
664 interface->netdev->name);
665
666 return 0;
667 }
668
669 static void bnx2fc_link_speed_update(struct fc_lport *lport)
670 {
671 struct fcoe_port *port = lport_priv(lport);
672 struct bnx2fc_interface *interface = port->priv;
673 struct net_device *netdev = interface->netdev;
674 struct ethtool_cmd ecmd;
675
676 if (!__ethtool_get_settings(netdev, &ecmd)) {
677 lport->link_supported_speeds &=
678 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
679 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
680 SUPPORTED_1000baseT_Full))
681 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
682 if (ecmd.supported & SUPPORTED_10000baseT_Full)
683 lport->link_supported_speeds |= FC_PORTSPEED_10GBIT;
684
685 switch (ethtool_cmd_speed(&ecmd)) {
686 case SPEED_1000:
687 lport->link_speed = FC_PORTSPEED_1GBIT;
688 break;
689 case SPEED_2500:
690 lport->link_speed = FC_PORTSPEED_2GBIT;
691 break;
692 case SPEED_10000:
693 lport->link_speed = FC_PORTSPEED_10GBIT;
694 break;
695 }
696 }
697 }
698 static int bnx2fc_link_ok(struct fc_lport *lport)
699 {
700 struct fcoe_port *port = lport_priv(lport);
701 struct bnx2fc_interface *interface = port->priv;
702 struct bnx2fc_hba *hba = interface->hba;
703 struct net_device *dev = hba->phys_dev;
704 int rc = 0;
705
706 if ((dev->flags & IFF_UP) && netif_carrier_ok(dev))
707 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
708 else {
709 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
710 rc = -1;
711 }
712 return rc;
713 }
714
715 /**
716 * bnx2fc_get_link_state - get network link state
717 *
718 * @hba: adapter instance pointer
719 *
720 * updates adapter structure flag based on netdev state
721 */
722 void bnx2fc_get_link_state(struct bnx2fc_hba *hba)
723 {
724 if (test_bit(__LINK_STATE_NOCARRIER, &hba->phys_dev->state))
725 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
726 else
727 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
728 }
729
730 static int bnx2fc_net_config(struct fc_lport *lport)
731 {
732 struct bnx2fc_hba *hba;
733 struct bnx2fc_interface *interface;
734 struct fcoe_port *port;
735 u64 wwnn, wwpn;
736
737 port = lport_priv(lport);
738 interface = port->priv;
739 hba = interface->hba;
740
741 /* require support for get_pauseparam ethtool op. */
742 if (!hba->phys_dev->ethtool_ops ||
743 !hba->phys_dev->ethtool_ops->get_pauseparam)
744 return -EOPNOTSUPP;
745
746 if (fc_set_mfs(lport, BNX2FC_MFS))
747 return -EINVAL;
748
749 skb_queue_head_init(&port->fcoe_pending_queue);
750 port->fcoe_pending_queue_active = 0;
751 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long) lport);
752
753 bnx2fc_link_speed_update(lport);
754
755 if (!lport->vport) {
756 wwnn = fcoe_wwn_from_mac(interface->ctlr.ctl_src_addr, 1, 0);
757 BNX2FC_HBA_DBG(lport, "WWNN = 0x%llx\n", wwnn);
758 fc_set_wwnn(lport, wwnn);
759
760 wwpn = fcoe_wwn_from_mac(interface->ctlr.ctl_src_addr, 2, 0);
761 BNX2FC_HBA_DBG(lport, "WWPN = 0x%llx\n", wwpn);
762 fc_set_wwpn(lport, wwpn);
763 }
764
765 return 0;
766 }
767
768 static void bnx2fc_destroy_timer(unsigned long data)
769 {
770 struct bnx2fc_hba *hba = (struct bnx2fc_hba *)data;
771
772 BNX2FC_MISC_DBG("ERROR:bnx2fc_destroy_timer - "
773 "Destroy compl not received!!\n");
774 set_bit(BNX2FC_FLAG_DESTROY_CMPL, &hba->flags);
775 wake_up_interruptible(&hba->destroy_wait);
776 }
777
778 /**
779 * bnx2fc_indicate_netevent - Generic netdev event handler
780 *
781 * @context: adapter structure pointer
782 * @event: event type
783 * @vlan_id: vlan id - associated vlan id with this event
784 *
785 * Handles NETDEV_UP, NETDEV_DOWN, NETDEV_GOING_DOWN,NETDEV_CHANGE and
786 * NETDEV_CHANGE_MTU events
787 */
788 static void bnx2fc_indicate_netevent(void *context, unsigned long event,
789 u16 vlan_id)
790 {
791 struct bnx2fc_hba *hba = (struct bnx2fc_hba *)context;
792 struct fc_lport *lport;
793 struct fc_lport *vport;
794 struct bnx2fc_interface *interface;
795 int wait_for_upload = 0;
796 u32 link_possible = 1;
797
798 /* Ignore vlans for now */
799 if (vlan_id != 0)
800 return;
801
802 switch (event) {
803 case NETDEV_UP:
804 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
805 printk(KERN_ERR "indicate_netevent: "\
806 "hba is not UP!!\n");
807 break;
808
809 case NETDEV_DOWN:
810 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
811 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
812 link_possible = 0;
813 break;
814
815 case NETDEV_GOING_DOWN:
816 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
817 link_possible = 0;
818 break;
819
820 case NETDEV_CHANGE:
821 break;
822
823 default:
824 printk(KERN_ERR PFX "Unkonwn netevent %ld", event);
825 return;
826 }
827
828 mutex_lock(&bnx2fc_dev_lock);
829 list_for_each_entry(interface, &if_list, list) {
830
831 if (interface->hba != hba)
832 continue;
833
834 lport = interface->ctlr.lp;
835 BNX2FC_HBA_DBG(lport, "netevent handler - event=%s %ld\n",
836 interface->netdev->name, event);
837
838 bnx2fc_link_speed_update(lport);
839
840 if (link_possible && !bnx2fc_link_ok(lport)) {
841 printk(KERN_ERR "indicate_netevent: ctlr_link_up\n");
842 fcoe_ctlr_link_up(&interface->ctlr);
843 } else if (fcoe_ctlr_link_down(&interface->ctlr)) {
844 mutex_lock(&lport->lp_mutex);
845 list_for_each_entry(vport, &lport->vports, list)
846 fc_host_port_type(vport->host) =
847 FC_PORTTYPE_UNKNOWN;
848 mutex_unlock(&lport->lp_mutex);
849 fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;
850 per_cpu_ptr(lport->dev_stats,
851 get_cpu())->LinkFailureCount++;
852 put_cpu();
853 fcoe_clean_pending_queue(lport);
854 wait_for_upload = 1;
855 }
856 }
857 mutex_unlock(&bnx2fc_dev_lock);
858
859 if (wait_for_upload) {
860 clear_bit(ADAPTER_STATE_READY, &hba->adapter_state);
861 init_waitqueue_head(&hba->shutdown_wait);
862 BNX2FC_MISC_DBG("indicate_netevent "
863 "num_ofld_sess = %d\n",
864 hba->num_ofld_sess);
865 hba->wait_for_link_down = 1;
866 wait_event_interruptible(hba->shutdown_wait,
867 (hba->num_ofld_sess == 0));
868 BNX2FC_MISC_DBG("wakeup - num_ofld_sess = %d\n",
869 hba->num_ofld_sess);
870 hba->wait_for_link_down = 0;
871
872 if (signal_pending(current))
873 flush_signals(current);
874 }
875 }
876
877 static int bnx2fc_libfc_config(struct fc_lport *lport)
878 {
879
880 /* Set the function pointers set by bnx2fc driver */
881 memcpy(&lport->tt, &bnx2fc_libfc_fcn_templ,
882 sizeof(struct libfc_function_template));
883 fc_elsct_init(lport);
884 fc_exch_init(lport);
885 fc_rport_init(lport);
886 fc_disc_init(lport);
887 return 0;
888 }
889
890 static int bnx2fc_em_config(struct fc_lport *lport)
891 {
892 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, FCOE_MIN_XID,
893 FCOE_MAX_XID, NULL)) {
894 printk(KERN_ERR PFX "em_config:fc_exch_mgr_alloc failed\n");
895 return -ENOMEM;
896 }
897
898 return 0;
899 }
900
901 static int bnx2fc_lport_config(struct fc_lport *lport)
902 {
903 lport->link_up = 0;
904 lport->qfull = 0;
905 lport->max_retry_count = 3;
906 lport->max_rport_retry_count = 3;
907 lport->e_d_tov = 2 * 1000;
908 lport->r_a_tov = 10 * 1000;
909
910 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
911 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
912 lport->does_npiv = 1;
913
914 memset(&lport->rnid_gen, 0, sizeof(struct fc_els_rnid_gen));
915 lport->rnid_gen.rnid_atype = BNX2FC_RNID_HBA;
916
917 /* alloc stats structure */
918 if (fc_lport_init_stats(lport))
919 return -ENOMEM;
920
921 /* Finish fc_lport configuration */
922 fc_lport_config(lport);
923
924 return 0;
925 }
926
927 /**
928 * bnx2fc_fip_recv - handle a received FIP frame.
929 *
930 * @skb: the received skb
931 * @dev: associated &net_device
932 * @ptype: the &packet_type structure which was used to register this handler.
933 * @orig_dev: original receive &net_device, in case @ dev is a bond.
934 *
935 * Returns: 0 for success
936 */
937 static int bnx2fc_fip_recv(struct sk_buff *skb, struct net_device *dev,
938 struct packet_type *ptype,
939 struct net_device *orig_dev)
940 {
941 struct bnx2fc_interface *interface;
942 interface = container_of(ptype, struct bnx2fc_interface,
943 fip_packet_type);
944 fcoe_ctlr_recv(&interface->ctlr, skb);
945 return 0;
946 }
947
948 /**
949 * bnx2fc_update_src_mac - Update Ethernet MAC filters.
950 *
951 * @fip: FCoE controller.
952 * @old: Unicast MAC address to delete if the MAC is non-zero.
953 * @new: Unicast MAC address to add.
954 *
955 * Remove any previously-set unicast MAC filter.
956 * Add secondary FCoE MAC address filter for our OUI.
957 */
958 static void bnx2fc_update_src_mac(struct fc_lport *lport, u8 *addr)
959 {
960 struct fcoe_port *port = lport_priv(lport);
961
962 memcpy(port->data_src_addr, addr, ETH_ALEN);
963 }
964
965 /**
966 * bnx2fc_get_src_mac - return the ethernet source address for an lport
967 *
968 * @lport: libfc port
969 */
970 static u8 *bnx2fc_get_src_mac(struct fc_lport *lport)
971 {
972 struct fcoe_port *port;
973
974 port = (struct fcoe_port *)lport_priv(lport);
975 return port->data_src_addr;
976 }
977
978 /**
979 * bnx2fc_fip_send - send an Ethernet-encapsulated FIP frame.
980 *
981 * @fip: FCoE controller.
982 * @skb: FIP Packet.
983 */
984 static void bnx2fc_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
985 {
986 skb->dev = bnx2fc_from_ctlr(fip)->netdev;
987 dev_queue_xmit(skb);
988 }
989
990 static int bnx2fc_vport_create(struct fc_vport *vport, bool disabled)
991 {
992 struct Scsi_Host *shost = vport_to_shost(vport);
993 struct fc_lport *n_port = shost_priv(shost);
994 struct fcoe_port *port = lport_priv(n_port);
995 struct bnx2fc_interface *interface = port->priv;
996 struct net_device *netdev = interface->netdev;
997 struct fc_lport *vn_port;
998
999 if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &interface->hba->flags)) {
1000 printk(KERN_ERR PFX "vn ports cannot be created on"
1001 "this interface\n");
1002 return -EIO;
1003 }
1004 rtnl_lock();
1005 mutex_lock(&bnx2fc_dev_lock);
1006 vn_port = bnx2fc_if_create(interface, &vport->dev, 1);
1007 mutex_unlock(&bnx2fc_dev_lock);
1008 rtnl_unlock();
1009
1010 if (IS_ERR(vn_port)) {
1011 printk(KERN_ERR PFX "bnx2fc_vport_create (%s) failed\n",
1012 netdev->name);
1013 return -EIO;
1014 }
1015
1016 if (disabled) {
1017 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1018 } else {
1019 vn_port->boot_time = jiffies;
1020 fc_lport_init(vn_port);
1021 fc_fabric_login(vn_port);
1022 fc_vport_setlink(vn_port);
1023 }
1024 return 0;
1025 }
1026
1027 static int bnx2fc_vport_destroy(struct fc_vport *vport)
1028 {
1029 struct Scsi_Host *shost = vport_to_shost(vport);
1030 struct fc_lport *n_port = shost_priv(shost);
1031 struct fc_lport *vn_port = vport->dd_data;
1032 struct fcoe_port *port = lport_priv(vn_port);
1033
1034 mutex_lock(&n_port->lp_mutex);
1035 list_del(&vn_port->list);
1036 mutex_unlock(&n_port->lp_mutex);
1037 queue_work(bnx2fc_wq, &port->destroy_work);
1038 return 0;
1039 }
1040
1041 static int bnx2fc_vport_disable(struct fc_vport *vport, bool disable)
1042 {
1043 struct fc_lport *lport = vport->dd_data;
1044
1045 if (disable) {
1046 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1047 fc_fabric_logoff(lport);
1048 } else {
1049 lport->boot_time = jiffies;
1050 fc_fabric_login(lport);
1051 fc_vport_setlink(lport);
1052 }
1053 return 0;
1054 }
1055
1056
1057 static int bnx2fc_netdev_setup(struct bnx2fc_interface *interface)
1058 {
1059 struct net_device *netdev = interface->netdev;
1060 struct net_device *physdev = interface->hba->phys_dev;
1061 struct netdev_hw_addr *ha;
1062 int sel_san_mac = 0;
1063
1064 /* setup Source MAC Address */
1065 rcu_read_lock();
1066 for_each_dev_addr(physdev, ha) {
1067 BNX2FC_MISC_DBG("net_config: ha->type = %d, fip_mac = ",
1068 ha->type);
1069 printk(KERN_INFO "%2x:%2x:%2x:%2x:%2x:%2x\n", ha->addr[0],
1070 ha->addr[1], ha->addr[2], ha->addr[3],
1071 ha->addr[4], ha->addr[5]);
1072
1073 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
1074 (is_valid_ether_addr(ha->addr))) {
1075 memcpy(interface->ctlr.ctl_src_addr, ha->addr,
1076 ETH_ALEN);
1077 sel_san_mac = 1;
1078 BNX2FC_MISC_DBG("Found SAN MAC\n");
1079 }
1080 }
1081 rcu_read_unlock();
1082
1083 if (!sel_san_mac)
1084 return -ENODEV;
1085
1086 interface->fip_packet_type.func = bnx2fc_fip_recv;
1087 interface->fip_packet_type.type = htons(ETH_P_FIP);
1088 interface->fip_packet_type.dev = netdev;
1089 dev_add_pack(&interface->fip_packet_type);
1090
1091 interface->fcoe_packet_type.func = bnx2fc_rcv;
1092 interface->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
1093 interface->fcoe_packet_type.dev = netdev;
1094 dev_add_pack(&interface->fcoe_packet_type);
1095
1096 return 0;
1097 }
1098
1099 static int bnx2fc_attach_transport(void)
1100 {
1101 bnx2fc_transport_template =
1102 fc_attach_transport(&bnx2fc_transport_function);
1103
1104 if (bnx2fc_transport_template == NULL) {
1105 printk(KERN_ERR PFX "Failed to attach FC transport\n");
1106 return -ENODEV;
1107 }
1108
1109 bnx2fc_vport_xport_template =
1110 fc_attach_transport(&bnx2fc_vport_xport_function);
1111 if (bnx2fc_vport_xport_template == NULL) {
1112 printk(KERN_ERR PFX
1113 "Failed to attach FC transport for vport\n");
1114 fc_release_transport(bnx2fc_transport_template);
1115 bnx2fc_transport_template = NULL;
1116 return -ENODEV;
1117 }
1118 return 0;
1119 }
1120 static void bnx2fc_release_transport(void)
1121 {
1122 fc_release_transport(bnx2fc_transport_template);
1123 fc_release_transport(bnx2fc_vport_xport_template);
1124 bnx2fc_transport_template = NULL;
1125 bnx2fc_vport_xport_template = NULL;
1126 }
1127
1128 static void bnx2fc_interface_release(struct kref *kref)
1129 {
1130 struct bnx2fc_interface *interface;
1131 struct net_device *netdev;
1132
1133 interface = container_of(kref, struct bnx2fc_interface, kref);
1134 BNX2FC_MISC_DBG("Interface is being released\n");
1135
1136 netdev = interface->netdev;
1137
1138 /* tear-down FIP controller */
1139 if (test_and_clear_bit(BNX2FC_CTLR_INIT_DONE, &interface->if_flags))
1140 fcoe_ctlr_destroy(&interface->ctlr);
1141
1142 kfree(interface);
1143
1144 dev_put(netdev);
1145 module_put(THIS_MODULE);
1146 }
1147
1148 static inline void bnx2fc_interface_get(struct bnx2fc_interface *interface)
1149 {
1150 kref_get(&interface->kref);
1151 }
1152
1153 static inline void bnx2fc_interface_put(struct bnx2fc_interface *interface)
1154 {
1155 kref_put(&interface->kref, bnx2fc_interface_release);
1156 }
1157 static void bnx2fc_hba_destroy(struct bnx2fc_hba *hba)
1158 {
1159 /* Free the command manager */
1160 if (hba->cmd_mgr) {
1161 bnx2fc_cmd_mgr_free(hba->cmd_mgr);
1162 hba->cmd_mgr = NULL;
1163 }
1164 kfree(hba->tgt_ofld_list);
1165 bnx2fc_unbind_pcidev(hba);
1166 kfree(hba);
1167 }
1168
1169 /**
1170 * bnx2fc_hba_create - create a new bnx2fc hba
1171 *
1172 * @cnic: pointer to cnic device
1173 *
1174 * Creates a new FCoE hba on the given device.
1175 *
1176 */
1177 static struct bnx2fc_hba *bnx2fc_hba_create(struct cnic_dev *cnic)
1178 {
1179 struct bnx2fc_hba *hba;
1180 int rc;
1181
1182 hba = kzalloc(sizeof(*hba), GFP_KERNEL);
1183 if (!hba) {
1184 printk(KERN_ERR PFX "Unable to allocate hba structure\n");
1185 return NULL;
1186 }
1187 spin_lock_init(&hba->hba_lock);
1188 mutex_init(&hba->hba_mutex);
1189
1190 hba->cnic = cnic;
1191 rc = bnx2fc_bind_pcidev(hba);
1192 if (rc) {
1193 printk(KERN_ERR PFX "create_adapter: bind error\n");
1194 goto bind_err;
1195 }
1196 hba->phys_dev = cnic->netdev;
1197 hba->next_conn_id = 0;
1198
1199 hba->tgt_ofld_list =
1200 kzalloc(sizeof(struct bnx2fc_rport *) * BNX2FC_NUM_MAX_SESS,
1201 GFP_KERNEL);
1202 if (!hba->tgt_ofld_list) {
1203 printk(KERN_ERR PFX "Unable to allocate tgt offload list\n");
1204 goto tgtofld_err;
1205 }
1206
1207 hba->num_ofld_sess = 0;
1208
1209 hba->cmd_mgr = bnx2fc_cmd_mgr_alloc(hba, BNX2FC_MIN_XID,
1210 BNX2FC_MAX_XID);
1211 if (!hba->cmd_mgr) {
1212 printk(KERN_ERR PFX "em_config:bnx2fc_cmd_mgr_alloc failed\n");
1213 goto cmgr_err;
1214 }
1215
1216 init_waitqueue_head(&hba->shutdown_wait);
1217 init_waitqueue_head(&hba->destroy_wait);
1218 INIT_LIST_HEAD(&hba->vports);
1219
1220 return hba;
1221
1222 cmgr_err:
1223 kfree(hba->tgt_ofld_list);
1224 tgtofld_err:
1225 bnx2fc_unbind_pcidev(hba);
1226 bind_err:
1227 kfree(hba);
1228 return NULL;
1229 }
1230
1231 struct bnx2fc_interface *bnx2fc_interface_create(struct bnx2fc_hba *hba,
1232 struct net_device *netdev,
1233 enum fip_state fip_mode)
1234 {
1235 struct bnx2fc_interface *interface;
1236 int rc = 0;
1237
1238 interface = kzalloc(sizeof(*interface), GFP_KERNEL);
1239 if (!interface) {
1240 printk(KERN_ERR PFX "Unable to allocate interface structure\n");
1241 return NULL;
1242 }
1243 dev_hold(netdev);
1244 kref_init(&interface->kref);
1245 interface->hba = hba;
1246 interface->netdev = netdev;
1247
1248 /* Initialize FIP */
1249 fcoe_ctlr_init(&interface->ctlr, fip_mode);
1250 interface->ctlr.send = bnx2fc_fip_send;
1251 interface->ctlr.update_mac = bnx2fc_update_src_mac;
1252 interface->ctlr.get_src_addr = bnx2fc_get_src_mac;
1253 set_bit(BNX2FC_CTLR_INIT_DONE, &interface->if_flags);
1254
1255 rc = bnx2fc_netdev_setup(interface);
1256 if (!rc)
1257 return interface;
1258
1259 fcoe_ctlr_destroy(&interface->ctlr);
1260 dev_put(netdev);
1261 kfree(interface);
1262 return NULL;
1263 }
1264
1265 /**
1266 * bnx2fc_if_create - Create FCoE instance on a given interface
1267 *
1268 * @interface: FCoE interface to create a local port on
1269 * @parent: Device pointer to be the parent in sysfs for the SCSI host
1270 * @npiv: Indicates if the port is vport or not
1271 *
1272 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1273 *
1274 * Returns: Allocated fc_lport or an error pointer
1275 */
1276 static struct fc_lport *bnx2fc_if_create(struct bnx2fc_interface *interface,
1277 struct device *parent, int npiv)
1278 {
1279 struct fc_lport *lport, *n_port;
1280 struct fcoe_port *port;
1281 struct Scsi_Host *shost;
1282 struct fc_vport *vport = dev_to_vport(parent);
1283 struct bnx2fc_lport *blport;
1284 struct bnx2fc_hba *hba;
1285 int rc = 0;
1286
1287 blport = kzalloc(sizeof(struct bnx2fc_lport), GFP_KERNEL);
1288 if (!blport) {
1289 BNX2FC_HBA_DBG(interface->ctlr.lp, "Unable to alloc blport\n");
1290 return NULL;
1291 }
1292
1293 /* Allocate Scsi_Host structure */
1294 if (!npiv)
1295 lport = libfc_host_alloc(&bnx2fc_shost_template, sizeof(*port));
1296 else
1297 lport = libfc_vport_create(vport, sizeof(*port));
1298
1299 if (!lport) {
1300 printk(KERN_ERR PFX "could not allocate scsi host structure\n");
1301 goto free_blport;
1302 }
1303 shost = lport->host;
1304 port = lport_priv(lport);
1305 port->lport = lport;
1306 port->priv = interface;
1307 INIT_WORK(&port->destroy_work, bnx2fc_destroy_work);
1308
1309 /* Configure fcoe_port */
1310 rc = bnx2fc_lport_config(lport);
1311 if (rc)
1312 goto lp_config_err;
1313
1314 if (npiv) {
1315 printk(KERN_ERR PFX "Setting vport names, 0x%llX 0x%llX\n",
1316 vport->node_name, vport->port_name);
1317 fc_set_wwnn(lport, vport->node_name);
1318 fc_set_wwpn(lport, vport->port_name);
1319 }
1320 /* Configure netdev and networking properties of the lport */
1321 rc = bnx2fc_net_config(lport);
1322 if (rc) {
1323 printk(KERN_ERR PFX "Error on bnx2fc_net_config\n");
1324 goto lp_config_err;
1325 }
1326
1327 rc = bnx2fc_shost_config(lport, parent);
1328 if (rc) {
1329 printk(KERN_ERR PFX "Couldnt configure shost for %s\n",
1330 interface->netdev->name);
1331 goto lp_config_err;
1332 }
1333
1334 /* Initialize the libfc library */
1335 rc = bnx2fc_libfc_config(lport);
1336 if (rc) {
1337 printk(KERN_ERR PFX "Couldnt configure libfc\n");
1338 goto shost_err;
1339 }
1340 fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;
1341
1342 /* Allocate exchange manager */
1343 if (!npiv)
1344 rc = bnx2fc_em_config(lport);
1345 else {
1346 shost = vport_to_shost(vport);
1347 n_port = shost_priv(shost);
1348 rc = fc_exch_mgr_list_clone(n_port, lport);
1349 }
1350
1351 if (rc) {
1352 printk(KERN_ERR PFX "Error on bnx2fc_em_config\n");
1353 goto shost_err;
1354 }
1355
1356 bnx2fc_interface_get(interface);
1357
1358 hba = interface->hba;
1359 spin_lock_bh(&hba->hba_lock);
1360 blport->lport = lport;
1361 list_add_tail(&blport->list, &hba->vports);
1362 spin_unlock_bh(&hba->hba_lock);
1363
1364 return lport;
1365
1366 shost_err:
1367 scsi_remove_host(shost);
1368 lp_config_err:
1369 scsi_host_put(lport->host);
1370 free_blport:
1371 kfree(blport);
1372 return NULL;
1373 }
1374
1375 static void bnx2fc_netdev_cleanup(struct bnx2fc_interface *interface)
1376 {
1377 /* Dont listen for Ethernet packets anymore */
1378 __dev_remove_pack(&interface->fcoe_packet_type);
1379 __dev_remove_pack(&interface->fip_packet_type);
1380 synchronize_net();
1381 }
1382
1383 static void bnx2fc_if_destroy(struct fc_lport *lport, struct bnx2fc_hba *hba)
1384 {
1385 struct fcoe_port *port = lport_priv(lport);
1386 struct bnx2fc_lport *blport, *tmp;
1387
1388 /* Stop the transmit retry timer */
1389 del_timer_sync(&port->timer);
1390
1391 /* Free existing transmit skbs */
1392 fcoe_clean_pending_queue(lport);
1393
1394 /* Free queued packets for the receive thread */
1395 bnx2fc_clean_rx_queue(lport);
1396
1397 /* Detach from scsi-ml */
1398 fc_remove_host(lport->host);
1399 scsi_remove_host(lport->host);
1400
1401 /*
1402 * Note that only the physical lport will have the exchange manager.
1403 * for vports, this function is NOP
1404 */
1405 fc_exch_mgr_free(lport);
1406
1407 /* Free memory used by statistical counters */
1408 fc_lport_free_stats(lport);
1409
1410 spin_lock_bh(&hba->hba_lock);
1411 list_for_each_entry_safe(blport, tmp, &hba->vports, list) {
1412 if (blport->lport == lport) {
1413 list_del(&blport->list);
1414 kfree(blport);
1415 }
1416 }
1417 spin_unlock_bh(&hba->hba_lock);
1418
1419 /* Release Scsi_Host */
1420 scsi_host_put(lport->host);
1421 }
1422
1423 /**
1424 * bnx2fc_destroy - Destroy a bnx2fc FCoE interface
1425 *
1426 * @buffer: The name of the Ethernet interface to be destroyed
1427 * @kp: The associated kernel parameter
1428 *
1429 * Called from sysfs.
1430 *
1431 * Returns: 0 for success
1432 */
1433 static int bnx2fc_destroy(struct net_device *netdev)
1434 {
1435 struct bnx2fc_interface *interface = NULL;
1436 struct bnx2fc_hba *hba;
1437 struct fc_lport *lport;
1438 int rc = 0;
1439
1440 rtnl_lock();
1441 mutex_lock(&bnx2fc_dev_lock);
1442
1443 interface = bnx2fc_interface_lookup(netdev);
1444 if (!interface || !interface->ctlr.lp) {
1445 rc = -ENODEV;
1446 printk(KERN_ERR PFX "bnx2fc_destroy: interface or lport not found\n");
1447 goto netdev_err;
1448 }
1449
1450 hba = interface->hba;
1451
1452 bnx2fc_netdev_cleanup(interface);
1453 lport = interface->ctlr.lp;
1454 bnx2fc_stop(interface);
1455 list_del(&interface->list);
1456 destroy_workqueue(interface->timer_work_queue);
1457 bnx2fc_interface_put(interface);
1458 bnx2fc_if_destroy(lport, hba);
1459
1460 netdev_err:
1461 mutex_unlock(&bnx2fc_dev_lock);
1462 rtnl_unlock();
1463 return rc;
1464 }
1465
1466 static void bnx2fc_destroy_work(struct work_struct *work)
1467 {
1468 struct fcoe_port *port;
1469 struct fc_lport *lport;
1470 struct bnx2fc_interface *interface;
1471 struct bnx2fc_hba *hba;
1472
1473 port = container_of(work, struct fcoe_port, destroy_work);
1474 lport = port->lport;
1475 interface = port->priv;
1476 hba = interface->hba;
1477
1478 BNX2FC_HBA_DBG(lport, "Entered bnx2fc_destroy_work\n");
1479
1480 bnx2fc_port_shutdown(lport);
1481 rtnl_lock();
1482 mutex_lock(&bnx2fc_dev_lock);
1483 bnx2fc_if_destroy(lport, hba);
1484 mutex_unlock(&bnx2fc_dev_lock);
1485 rtnl_unlock();
1486 }
1487
1488 static void bnx2fc_unbind_adapter_devices(struct bnx2fc_hba *hba)
1489 {
1490 bnx2fc_free_fw_resc(hba);
1491 bnx2fc_free_task_ctx(hba);
1492 }
1493
1494 /**
1495 * bnx2fc_bind_adapter_devices - binds bnx2fc adapter with the associated
1496 * pci structure
1497 *
1498 * @hba: Adapter instance
1499 */
1500 static int bnx2fc_bind_adapter_devices(struct bnx2fc_hba *hba)
1501 {
1502 if (bnx2fc_setup_task_ctx(hba))
1503 goto mem_err;
1504
1505 if (bnx2fc_setup_fw_resc(hba))
1506 goto mem_err;
1507
1508 return 0;
1509 mem_err:
1510 bnx2fc_unbind_adapter_devices(hba);
1511 return -ENOMEM;
1512 }
1513
1514 static int bnx2fc_bind_pcidev(struct bnx2fc_hba *hba)
1515 {
1516 struct cnic_dev *cnic;
1517
1518 if (!hba->cnic) {
1519 printk(KERN_ERR PFX "cnic is NULL\n");
1520 return -ENODEV;
1521 }
1522 cnic = hba->cnic;
1523 hba->pcidev = cnic->pcidev;
1524 if (hba->pcidev)
1525 pci_dev_get(hba->pcidev);
1526
1527 return 0;
1528 }
1529
1530 static void bnx2fc_unbind_pcidev(struct bnx2fc_hba *hba)
1531 {
1532 if (hba->pcidev)
1533 pci_dev_put(hba->pcidev);
1534 hba->pcidev = NULL;
1535 }
1536
1537
1538
1539 /**
1540 * bnx2fc_ulp_start - cnic callback to initialize & start adapter instance
1541 *
1542 * @handle: transport handle pointing to adapter struture
1543 *
1544 * This function maps adapter structure to pcidev structure and initiates
1545 * firmware handshake to enable/initialize on-chip FCoE components.
1546 * This bnx2fc - cnic interface api callback is used after following
1547 * conditions are met -
1548 * a) underlying network interface is up (marked by event NETDEV_UP
1549 * from netdev
1550 * b) bnx2fc adatper structure is registered.
1551 */
1552 static void bnx2fc_ulp_start(void *handle)
1553 {
1554 struct bnx2fc_hba *hba = handle;
1555 struct bnx2fc_interface *interface;
1556 struct fc_lport *lport;
1557
1558 mutex_lock(&bnx2fc_dev_lock);
1559
1560 if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags))
1561 bnx2fc_fw_init(hba);
1562
1563 BNX2FC_MISC_DBG("bnx2fc started.\n");
1564
1565 list_for_each_entry(interface, &if_list, list) {
1566 if (interface->hba == hba) {
1567 lport = interface->ctlr.lp;
1568 /* Kick off Fabric discovery*/
1569 printk(KERN_ERR PFX "ulp_init: start discovery\n");
1570 lport->tt.frame_send = bnx2fc_xmit;
1571 bnx2fc_start_disc(interface);
1572 }
1573 }
1574
1575 mutex_unlock(&bnx2fc_dev_lock);
1576 }
1577
1578 static void bnx2fc_port_shutdown(struct fc_lport *lport)
1579 {
1580 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1581 fc_fabric_logoff(lport);
1582 fc_lport_destroy(lport);
1583 }
1584
1585 static void bnx2fc_stop(struct bnx2fc_interface *interface)
1586 {
1587 struct fc_lport *lport;
1588 struct fc_lport *vport;
1589
1590 if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &interface->hba->flags))
1591 return;
1592
1593 lport = interface->ctlr.lp;
1594 bnx2fc_port_shutdown(lport);
1595
1596 mutex_lock(&lport->lp_mutex);
1597 list_for_each_entry(vport, &lport->vports, list)
1598 fc_host_port_type(vport->host) =
1599 FC_PORTTYPE_UNKNOWN;
1600 mutex_unlock(&lport->lp_mutex);
1601 fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;
1602 fcoe_ctlr_link_down(&interface->ctlr);
1603 fcoe_clean_pending_queue(lport);
1604 }
1605
1606 static int bnx2fc_fw_init(struct bnx2fc_hba *hba)
1607 {
1608 #define BNX2FC_INIT_POLL_TIME (1000 / HZ)
1609 int rc = -1;
1610 int i = HZ;
1611
1612 rc = bnx2fc_bind_adapter_devices(hba);
1613 if (rc) {
1614 printk(KERN_ALERT PFX
1615 "bnx2fc_bind_adapter_devices failed - rc = %d\n", rc);
1616 goto err_out;
1617 }
1618
1619 rc = bnx2fc_send_fw_fcoe_init_msg(hba);
1620 if (rc) {
1621 printk(KERN_ALERT PFX
1622 "bnx2fc_send_fw_fcoe_init_msg failed - rc = %d\n", rc);
1623 goto err_unbind;
1624 }
1625
1626 /*
1627 * Wait until the adapter init message is complete, and adapter
1628 * state is UP.
1629 */
1630 while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--)
1631 msleep(BNX2FC_INIT_POLL_TIME);
1632
1633 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) {
1634 printk(KERN_ERR PFX "bnx2fc_start: %s failed to initialize. "
1635 "Ignoring...\n",
1636 hba->cnic->netdev->name);
1637 rc = -1;
1638 goto err_unbind;
1639 }
1640
1641
1642 set_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags);
1643 return 0;
1644
1645 err_unbind:
1646 bnx2fc_unbind_adapter_devices(hba);
1647 err_out:
1648 return rc;
1649 }
1650
1651 static void bnx2fc_fw_destroy(struct bnx2fc_hba *hba)
1652 {
1653 if (test_and_clear_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags)) {
1654 if (bnx2fc_send_fw_fcoe_destroy_msg(hba) == 0) {
1655 init_timer(&hba->destroy_timer);
1656 hba->destroy_timer.expires = BNX2FC_FW_TIMEOUT +
1657 jiffies;
1658 hba->destroy_timer.function = bnx2fc_destroy_timer;
1659 hba->destroy_timer.data = (unsigned long)hba;
1660 add_timer(&hba->destroy_timer);
1661 wait_event_interruptible(hba->destroy_wait,
1662 test_bit(BNX2FC_FLAG_DESTROY_CMPL,
1663 &hba->flags));
1664 /* This should never happen */
1665 if (signal_pending(current))
1666 flush_signals(current);
1667
1668 del_timer_sync(&hba->destroy_timer);
1669 }
1670 bnx2fc_unbind_adapter_devices(hba);
1671 }
1672 }
1673
1674 /**
1675 * bnx2fc_ulp_stop - cnic callback to shutdown adapter instance
1676 *
1677 * @handle: transport handle pointing to adapter structure
1678 *
1679 * Driver checks if adapter is already in shutdown mode, if not start
1680 * the shutdown process.
1681 */
1682 static void bnx2fc_ulp_stop(void *handle)
1683 {
1684 struct bnx2fc_hba *hba = handle;
1685 struct bnx2fc_interface *interface;
1686
1687 printk(KERN_ERR "ULP_STOP\n");
1688
1689 mutex_lock(&bnx2fc_dev_lock);
1690 if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags))
1691 goto exit;
1692 list_for_each_entry(interface, &if_list, list) {
1693 if (interface->hba == hba)
1694 bnx2fc_stop(interface);
1695 }
1696 BUG_ON(hba->num_ofld_sess != 0);
1697
1698 mutex_lock(&hba->hba_mutex);
1699 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
1700 clear_bit(ADAPTER_STATE_GOING_DOWN,
1701 &hba->adapter_state);
1702
1703 clear_bit(ADAPTER_STATE_READY, &hba->adapter_state);
1704 mutex_unlock(&hba->hba_mutex);
1705
1706 bnx2fc_fw_destroy(hba);
1707 exit:
1708 mutex_unlock(&bnx2fc_dev_lock);
1709 }
1710
1711 static void bnx2fc_start_disc(struct bnx2fc_interface *interface)
1712 {
1713 struct fc_lport *lport;
1714 int wait_cnt = 0;
1715
1716 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1717 /* Kick off FIP/FLOGI */
1718 if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &interface->hba->flags)) {
1719 printk(KERN_ERR PFX "Init not done yet\n");
1720 return;
1721 }
1722
1723 lport = interface->ctlr.lp;
1724 BNX2FC_HBA_DBG(lport, "calling fc_fabric_login\n");
1725
1726 if (!bnx2fc_link_ok(lport)) {
1727 BNX2FC_HBA_DBG(lport, "ctlr_link_up\n");
1728 fcoe_ctlr_link_up(&interface->ctlr);
1729 fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1730 set_bit(ADAPTER_STATE_READY, &interface->hba->adapter_state);
1731 }
1732
1733 /* wait for the FCF to be selected before issuing FLOGI */
1734 while (!interface->ctlr.sel_fcf) {
1735 msleep(250);
1736 /* give up after 3 secs */
1737 if (++wait_cnt > 12)
1738 break;
1739 }
1740 fc_lport_init(lport);
1741 fc_fabric_login(lport);
1742 }
1743
1744
1745 /**
1746 * bnx2fc_ulp_init - Initialize an adapter instance
1747 *
1748 * @dev : cnic device handle
1749 * Called from cnic_register_driver() context to initialize all
1750 * enumerated cnic devices. This routine allocates adapter structure
1751 * and other device specific resources.
1752 */
1753 static void bnx2fc_ulp_init(struct cnic_dev *dev)
1754 {
1755 struct bnx2fc_hba *hba;
1756 int rc = 0;
1757
1758 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1759 /* bnx2fc works only when bnx2x is loaded */
1760 if (!test_bit(CNIC_F_BNX2X_CLASS, &dev->flags) ||
1761 (dev->max_fcoe_conn == 0)) {
1762 printk(KERN_ERR PFX "bnx2fc FCoE not supported on %s,"
1763 " flags: %lx fcoe_conn: %d\n",
1764 dev->netdev->name, dev->flags, dev->max_fcoe_conn);
1765 return;
1766 }
1767
1768 hba = bnx2fc_hba_create(dev);
1769 if (!hba) {
1770 printk(KERN_ERR PFX "hba initialization failed\n");
1771 return;
1772 }
1773
1774 /* Add HBA to the adapter list */
1775 mutex_lock(&bnx2fc_dev_lock);
1776 list_add_tail(&hba->list, &adapter_list);
1777 adapter_count++;
1778 mutex_unlock(&bnx2fc_dev_lock);
1779
1780 clear_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic);
1781 rc = dev->register_device(dev, CNIC_ULP_FCOE,
1782 (void *) hba);
1783 if (rc)
1784 printk(KERN_ERR PFX "register_device failed, rc = %d\n", rc);
1785 else
1786 set_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic);
1787 }
1788
1789
1790 static int bnx2fc_disable(struct net_device *netdev)
1791 {
1792 struct bnx2fc_interface *interface;
1793 int rc = 0;
1794
1795 rtnl_lock();
1796 mutex_lock(&bnx2fc_dev_lock);
1797
1798 interface = bnx2fc_interface_lookup(netdev);
1799 if (!interface || !interface->ctlr.lp) {
1800 rc = -ENODEV;
1801 printk(KERN_ERR PFX "bnx2fc_disable: interface or lport not found\n");
1802 } else {
1803 fcoe_ctlr_link_down(&interface->ctlr);
1804 fcoe_clean_pending_queue(interface->ctlr.lp);
1805 }
1806
1807 mutex_unlock(&bnx2fc_dev_lock);
1808 rtnl_unlock();
1809 return rc;
1810 }
1811
1812
1813 static int bnx2fc_enable(struct net_device *netdev)
1814 {
1815 struct bnx2fc_interface *interface;
1816 int rc = 0;
1817
1818 rtnl_lock();
1819 mutex_lock(&bnx2fc_dev_lock);
1820
1821 interface = bnx2fc_interface_lookup(netdev);
1822 if (!interface || !interface->ctlr.lp) {
1823 rc = -ENODEV;
1824 printk(KERN_ERR PFX "bnx2fc_enable: interface or lport not found\n");
1825 } else if (!bnx2fc_link_ok(interface->ctlr.lp))
1826 fcoe_ctlr_link_up(&interface->ctlr);
1827
1828 mutex_unlock(&bnx2fc_dev_lock);
1829 rtnl_unlock();
1830 return rc;
1831 }
1832
1833 /**
1834 * bnx2fc_create - Create bnx2fc FCoE interface
1835 *
1836 * @buffer: The name of Ethernet interface to create on
1837 * @kp: The associated kernel param
1838 *
1839 * Called from sysfs.
1840 *
1841 * Returns: 0 for success
1842 */
1843 static int bnx2fc_create(struct net_device *netdev, enum fip_state fip_mode)
1844 {
1845 struct bnx2fc_interface *interface;
1846 struct bnx2fc_hba *hba;
1847 struct net_device *phys_dev;
1848 struct fc_lport *lport;
1849 struct ethtool_drvinfo drvinfo;
1850 int rc = 0;
1851 int vlan_id;
1852
1853 BNX2FC_MISC_DBG("Entered bnx2fc_create\n");
1854 if (fip_mode != FIP_MODE_FABRIC) {
1855 printk(KERN_ERR "fip mode not FABRIC\n");
1856 return -EIO;
1857 }
1858
1859 rtnl_lock();
1860
1861 mutex_lock(&bnx2fc_dev_lock);
1862
1863 if (!try_module_get(THIS_MODULE)) {
1864 rc = -EINVAL;
1865 goto mod_err;
1866 }
1867
1868 /* obtain physical netdev */
1869 if (netdev->priv_flags & IFF_802_1Q_VLAN) {
1870 phys_dev = vlan_dev_real_dev(netdev);
1871 vlan_id = vlan_dev_vlan_id(netdev);
1872 } else {
1873 printk(KERN_ERR PFX "Not a vlan device\n");
1874 rc = -EINVAL;
1875 goto netdev_err;
1876 }
1877 /* verify if the physical device is a netxtreme2 device */
1878 if (phys_dev->ethtool_ops && phys_dev->ethtool_ops->get_drvinfo) {
1879 memset(&drvinfo, 0, sizeof(drvinfo));
1880 phys_dev->ethtool_ops->get_drvinfo(phys_dev, &drvinfo);
1881 if (strncmp(drvinfo.driver, "bnx2x", strlen("bnx2x"))) {
1882 printk(KERN_ERR PFX "Not a netxtreme2 device\n");
1883 rc = -EINVAL;
1884 goto netdev_err;
1885 }
1886 } else {
1887 printk(KERN_ERR PFX "unable to obtain drv_info\n");
1888 rc = -EINVAL;
1889 goto netdev_err;
1890 }
1891
1892 /* obtain interface and initialize rest of the structure */
1893 hba = bnx2fc_hba_lookup(phys_dev);
1894 if (!hba) {
1895 rc = -ENODEV;
1896 printk(KERN_ERR PFX "bnx2fc_create: hba not found\n");
1897 goto netdev_err;
1898 }
1899
1900 if (bnx2fc_interface_lookup(netdev)) {
1901 rc = -EEXIST;
1902 goto netdev_err;
1903 }
1904
1905 interface = bnx2fc_interface_create(hba, netdev, fip_mode);
1906 if (!interface) {
1907 printk(KERN_ERR PFX "bnx2fc_interface_create failed\n");
1908 goto ifput_err;
1909 }
1910
1911 interface->vlan_id = vlan_id;
1912 interface->vlan_enabled = 1;
1913
1914 interface->timer_work_queue =
1915 create_singlethread_workqueue("bnx2fc_timer_wq");
1916 if (!interface->timer_work_queue) {
1917 printk(KERN_ERR PFX "ulp_init could not create timer_wq\n");
1918 rc = -EINVAL;
1919 goto ifput_err;
1920 }
1921
1922 lport = bnx2fc_if_create(interface, &interface->hba->pcidev->dev, 0);
1923 if (!lport) {
1924 printk(KERN_ERR PFX "Failed to create interface (%s)\n",
1925 netdev->name);
1926 bnx2fc_netdev_cleanup(interface);
1927 rc = -EINVAL;
1928 goto if_create_err;
1929 }
1930
1931 /* Add interface to if_list */
1932 list_add_tail(&interface->list, &if_list);
1933
1934 lport->boot_time = jiffies;
1935
1936 /* Make this master N_port */
1937 interface->ctlr.lp = lport;
1938
1939 BNX2FC_HBA_DBG(lport, "create: START DISC\n");
1940 bnx2fc_start_disc(interface);
1941 /*
1942 * Release from kref_init in bnx2fc_interface_setup, on success
1943 * lport should be holding a reference taken in bnx2fc_if_create
1944 */
1945 bnx2fc_interface_put(interface);
1946 /* put netdev that was held while calling dev_get_by_name */
1947 mutex_unlock(&bnx2fc_dev_lock);
1948 rtnl_unlock();
1949 return 0;
1950
1951 if_create_err:
1952 destroy_workqueue(interface->timer_work_queue);
1953 ifput_err:
1954 bnx2fc_interface_put(interface);
1955 netdev_err:
1956 module_put(THIS_MODULE);
1957 mod_err:
1958 mutex_unlock(&bnx2fc_dev_lock);
1959 rtnl_unlock();
1960 return rc;
1961 }
1962
1963 /**
1964 * bnx2fc_find_hba_for_cnic - maps cnic instance to bnx2fc hba instance
1965 *
1966 * @cnic: Pointer to cnic device instance
1967 *
1968 **/
1969 static struct bnx2fc_hba *bnx2fc_find_hba_for_cnic(struct cnic_dev *cnic)
1970 {
1971 struct list_head *list;
1972 struct list_head *temp;
1973 struct bnx2fc_hba *hba;
1974
1975 /* Called with bnx2fc_dev_lock held */
1976 list_for_each_safe(list, temp, &adapter_list) {
1977 hba = (struct bnx2fc_hba *)list;
1978 if (hba->cnic == cnic)
1979 return hba;
1980 }
1981 return NULL;
1982 }
1983
1984 static struct bnx2fc_interface *bnx2fc_interface_lookup(struct net_device
1985 *netdev)
1986 {
1987 struct bnx2fc_interface *interface;
1988
1989 /* Called with bnx2fc_dev_lock held */
1990 list_for_each_entry(interface, &if_list, list) {
1991 if (interface->netdev == netdev)
1992 return interface;
1993 }
1994 return NULL;
1995 }
1996
1997 static struct bnx2fc_hba *bnx2fc_hba_lookup(struct net_device
1998 *phys_dev)
1999 {
2000 struct bnx2fc_hba *hba;
2001
2002 /* Called with bnx2fc_dev_lock held */
2003 list_for_each_entry(hba, &adapter_list, list) {
2004 if (hba->phys_dev == phys_dev)
2005 return hba;
2006 }
2007 printk(KERN_ERR PFX "adapter_lookup: hba NULL\n");
2008 return NULL;
2009 }
2010
2011 /**
2012 * bnx2fc_ulp_exit - shuts down adapter instance and frees all resources
2013 *
2014 * @dev cnic device handle
2015 */
2016 static void bnx2fc_ulp_exit(struct cnic_dev *dev)
2017 {
2018 struct bnx2fc_hba *hba;
2019 struct bnx2fc_interface *interface, *tmp;
2020 struct fc_lport *lport;
2021
2022 BNX2FC_MISC_DBG("Entered bnx2fc_ulp_exit\n");
2023
2024 if (!test_bit(CNIC_F_BNX2X_CLASS, &dev->flags)) {
2025 printk(KERN_ERR PFX "bnx2fc port check: %s, flags: %lx\n",
2026 dev->netdev->name, dev->flags);
2027 return;
2028 }
2029
2030 mutex_lock(&bnx2fc_dev_lock);
2031 hba = bnx2fc_find_hba_for_cnic(dev);
2032 if (!hba) {
2033 printk(KERN_ERR PFX "bnx2fc_ulp_exit: hba not found, dev 0%p\n",
2034 dev);
2035 mutex_unlock(&bnx2fc_dev_lock);
2036 return;
2037 }
2038
2039 list_del_init(&hba->list);
2040 adapter_count--;
2041
2042 list_for_each_entry_safe(interface, tmp, &if_list, list) {
2043 /* destroy not called yet, move to quiesced list */
2044 if (interface->hba == hba) {
2045 bnx2fc_netdev_cleanup(interface);
2046 bnx2fc_stop(interface);
2047
2048 list_del(&interface->list);
2049 lport = interface->ctlr.lp;
2050 bnx2fc_interface_put(interface);
2051 bnx2fc_if_destroy(lport, hba);
2052 }
2053 }
2054 mutex_unlock(&bnx2fc_dev_lock);
2055
2056 bnx2fc_ulp_stop(hba);
2057 /* unregister cnic device */
2058 if (test_and_clear_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic))
2059 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_FCOE);
2060 bnx2fc_hba_destroy(hba);
2061 }
2062
2063 /**
2064 * bnx2fc_fcoe_reset - Resets the fcoe
2065 *
2066 * @shost: shost the reset is from
2067 *
2068 * Returns: always 0
2069 */
2070 static int bnx2fc_fcoe_reset(struct Scsi_Host *shost)
2071 {
2072 struct fc_lport *lport = shost_priv(shost);
2073 fc_lport_reset(lport);
2074 return 0;
2075 }
2076
2077
2078 static bool bnx2fc_match(struct net_device *netdev)
2079 {
2080 mutex_lock(&bnx2fc_dev_lock);
2081 if (netdev->priv_flags & IFF_802_1Q_VLAN) {
2082 struct net_device *phys_dev = vlan_dev_real_dev(netdev);
2083
2084 if (bnx2fc_hba_lookup(phys_dev)) {
2085 mutex_unlock(&bnx2fc_dev_lock);
2086 return true;
2087 }
2088 }
2089 mutex_unlock(&bnx2fc_dev_lock);
2090 return false;
2091 }
2092
2093
2094 static struct fcoe_transport bnx2fc_transport = {
2095 .name = {"bnx2fc"},
2096 .attached = false,
2097 .list = LIST_HEAD_INIT(bnx2fc_transport.list),
2098 .match = bnx2fc_match,
2099 .create = bnx2fc_create,
2100 .destroy = bnx2fc_destroy,
2101 .enable = bnx2fc_enable,
2102 .disable = bnx2fc_disable,
2103 };
2104
2105 /**
2106 * bnx2fc_percpu_thread_create - Create a receive thread for an
2107 * online CPU
2108 *
2109 * @cpu: cpu index for the online cpu
2110 */
2111 static void bnx2fc_percpu_thread_create(unsigned int cpu)
2112 {
2113 struct bnx2fc_percpu_s *p;
2114 struct task_struct *thread;
2115
2116 p = &per_cpu(bnx2fc_percpu, cpu);
2117
2118 thread = kthread_create(bnx2fc_percpu_io_thread,
2119 (void *)p,
2120 "bnx2fc_thread/%d", cpu);
2121 /* bind thread to the cpu */
2122 if (likely(!IS_ERR(p->iothread))) {
2123 kthread_bind(thread, cpu);
2124 p->iothread = thread;
2125 wake_up_process(thread);
2126 }
2127 }
2128
2129 static void bnx2fc_percpu_thread_destroy(unsigned int cpu)
2130 {
2131 struct bnx2fc_percpu_s *p;
2132 struct task_struct *thread;
2133 struct bnx2fc_work *work, *tmp;
2134 LIST_HEAD(work_list);
2135
2136 BNX2FC_MISC_DBG("destroying io thread for CPU %d\n", cpu);
2137
2138 /* Prevent any new work from being queued for this CPU */
2139 p = &per_cpu(bnx2fc_percpu, cpu);
2140 spin_lock_bh(&p->fp_work_lock);
2141 thread = p->iothread;
2142 p->iothread = NULL;
2143
2144
2145 /* Free all work in the list */
2146 list_for_each_entry_safe(work, tmp, &work_list, list) {
2147 list_del_init(&work->list);
2148 bnx2fc_process_cq_compl(work->tgt, work->wqe);
2149 kfree(work);
2150 }
2151
2152 spin_unlock_bh(&p->fp_work_lock);
2153
2154 if (thread)
2155 kthread_stop(thread);
2156 }
2157
2158 /**
2159 * bnx2fc_cpu_callback - Handler for CPU hotplug events
2160 *
2161 * @nfb: The callback data block
2162 * @action: The event triggering the callback
2163 * @hcpu: The index of the CPU that the event is for
2164 *
2165 * This creates or destroys per-CPU data for fcoe
2166 *
2167 * Returns NOTIFY_OK always.
2168 */
2169 static int bnx2fc_cpu_callback(struct notifier_block *nfb,
2170 unsigned long action, void *hcpu)
2171 {
2172 unsigned cpu = (unsigned long)hcpu;
2173
2174 switch (action) {
2175 case CPU_ONLINE:
2176 case CPU_ONLINE_FROZEN:
2177 printk(PFX "CPU %x online: Create Rx thread\n", cpu);
2178 bnx2fc_percpu_thread_create(cpu);
2179 break;
2180 case CPU_DEAD:
2181 case CPU_DEAD_FROZEN:
2182 printk(PFX "CPU %x offline: Remove Rx thread\n", cpu);
2183 bnx2fc_percpu_thread_destroy(cpu);
2184 break;
2185 default:
2186 break;
2187 }
2188 return NOTIFY_OK;
2189 }
2190
2191 /**
2192 * bnx2fc_mod_init - module init entry point
2193 *
2194 * Initialize driver wide global data structures, and register
2195 * with cnic module
2196 **/
2197 static int __init bnx2fc_mod_init(void)
2198 {
2199 struct fcoe_percpu_s *bg;
2200 struct task_struct *l2_thread;
2201 int rc = 0;
2202 unsigned int cpu = 0;
2203 struct bnx2fc_percpu_s *p;
2204
2205 printk(KERN_INFO PFX "%s", version);
2206
2207 /* register as a fcoe transport */
2208 rc = fcoe_transport_attach(&bnx2fc_transport);
2209 if (rc) {
2210 printk(KERN_ERR "failed to register an fcoe transport, check "
2211 "if libfcoe is loaded\n");
2212 goto out;
2213 }
2214
2215 INIT_LIST_HEAD(&adapter_list);
2216 INIT_LIST_HEAD(&if_list);
2217 mutex_init(&bnx2fc_dev_lock);
2218 adapter_count = 0;
2219
2220 /* Attach FC transport template */
2221 rc = bnx2fc_attach_transport();
2222 if (rc)
2223 goto detach_ft;
2224
2225 bnx2fc_wq = alloc_workqueue("bnx2fc", 0, 0);
2226 if (!bnx2fc_wq) {
2227 rc = -ENOMEM;
2228 goto release_bt;
2229 }
2230
2231 bg = &bnx2fc_global;
2232 skb_queue_head_init(&bg->fcoe_rx_list);
2233 l2_thread = kthread_create(bnx2fc_l2_rcv_thread,
2234 (void *)bg,
2235 "bnx2fc_l2_thread");
2236 if (IS_ERR(l2_thread)) {
2237 rc = PTR_ERR(l2_thread);
2238 goto free_wq;
2239 }
2240 wake_up_process(l2_thread);
2241 spin_lock_bh(&bg->fcoe_rx_list.lock);
2242 bg->thread = l2_thread;
2243 spin_unlock_bh(&bg->fcoe_rx_list.lock);
2244
2245 for_each_possible_cpu(cpu) {
2246 p = &per_cpu(bnx2fc_percpu, cpu);
2247 INIT_LIST_HEAD(&p->work_list);
2248 spin_lock_init(&p->fp_work_lock);
2249 }
2250
2251 for_each_online_cpu(cpu) {
2252 bnx2fc_percpu_thread_create(cpu);
2253 }
2254
2255 /* Initialize per CPU interrupt thread */
2256 register_hotcpu_notifier(&bnx2fc_cpu_notifier);
2257
2258 cnic_register_driver(CNIC_ULP_FCOE, &bnx2fc_cnic_cb);
2259
2260 return 0;
2261
2262 free_wq:
2263 destroy_workqueue(bnx2fc_wq);
2264 release_bt:
2265 bnx2fc_release_transport();
2266 detach_ft:
2267 fcoe_transport_detach(&bnx2fc_transport);
2268 out:
2269 return rc;
2270 }
2271
2272 static void __exit bnx2fc_mod_exit(void)
2273 {
2274 LIST_HEAD(to_be_deleted);
2275 struct bnx2fc_hba *hba, *next;
2276 struct fcoe_percpu_s *bg;
2277 struct task_struct *l2_thread;
2278 struct sk_buff *skb;
2279 unsigned int cpu = 0;
2280
2281 /*
2282 * NOTE: Since cnic calls register_driver routine rtnl_lock,
2283 * it will have higher precedence than bnx2fc_dev_lock.
2284 * unregister_device() cannot be called with bnx2fc_dev_lock
2285 * held.
2286 */
2287 mutex_lock(&bnx2fc_dev_lock);
2288 list_splice(&adapter_list, &to_be_deleted);
2289 INIT_LIST_HEAD(&adapter_list);
2290 adapter_count = 0;
2291 mutex_unlock(&bnx2fc_dev_lock);
2292
2293 /* Unregister with cnic */
2294 list_for_each_entry_safe(hba, next, &to_be_deleted, list) {
2295 list_del_init(&hba->list);
2296 printk(KERN_ERR PFX "MOD_EXIT:destroy hba = 0x%p\n",
2297 hba);
2298 bnx2fc_ulp_stop(hba);
2299 /* unregister cnic device */
2300 if (test_and_clear_bit(BNX2FC_CNIC_REGISTERED,
2301 &hba->reg_with_cnic))
2302 hba->cnic->unregister_device(hba->cnic,
2303 CNIC_ULP_FCOE);
2304 bnx2fc_hba_destroy(hba);
2305 }
2306 cnic_unregister_driver(CNIC_ULP_FCOE);
2307
2308 /* Destroy global thread */
2309 bg = &bnx2fc_global;
2310 spin_lock_bh(&bg->fcoe_rx_list.lock);
2311 l2_thread = bg->thread;
2312 bg->thread = NULL;
2313 while ((skb = __skb_dequeue(&bg->fcoe_rx_list)) != NULL)
2314 kfree_skb(skb);
2315
2316 spin_unlock_bh(&bg->fcoe_rx_list.lock);
2317
2318 if (l2_thread)
2319 kthread_stop(l2_thread);
2320
2321 unregister_hotcpu_notifier(&bnx2fc_cpu_notifier);
2322
2323 /* Destroy per cpu threads */
2324 for_each_online_cpu(cpu) {
2325 bnx2fc_percpu_thread_destroy(cpu);
2326 }
2327
2328 destroy_workqueue(bnx2fc_wq);
2329 /*
2330 * detach from scsi transport
2331 * must happen after all destroys are done
2332 */
2333 bnx2fc_release_transport();
2334
2335 /* detach from fcoe transport */
2336 fcoe_transport_detach(&bnx2fc_transport);
2337 }
2338
2339 module_init(bnx2fc_mod_init);
2340 module_exit(bnx2fc_mod_exit);
2341
2342 static struct fc_function_template bnx2fc_transport_function = {
2343 .show_host_node_name = 1,
2344 .show_host_port_name = 1,
2345 .show_host_supported_classes = 1,
2346 .show_host_supported_fc4s = 1,
2347 .show_host_active_fc4s = 1,
2348 .show_host_maxframe_size = 1,
2349
2350 .show_host_port_id = 1,
2351 .show_host_supported_speeds = 1,
2352 .get_host_speed = fc_get_host_speed,
2353 .show_host_speed = 1,
2354 .show_host_port_type = 1,
2355 .get_host_port_state = fc_get_host_port_state,
2356 .show_host_port_state = 1,
2357 .show_host_symbolic_name = 1,
2358
2359 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2360 sizeof(struct bnx2fc_rport)),
2361 .show_rport_maxframe_size = 1,
2362 .show_rport_supported_classes = 1,
2363
2364 .show_host_fabric_name = 1,
2365 .show_starget_node_name = 1,
2366 .show_starget_port_name = 1,
2367 .show_starget_port_id = 1,
2368 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2369 .show_rport_dev_loss_tmo = 1,
2370 .get_fc_host_stats = bnx2fc_get_host_stats,
2371
2372 .issue_fc_host_lip = bnx2fc_fcoe_reset,
2373
2374 .terminate_rport_io = fc_rport_terminate_io,
2375
2376 .vport_create = bnx2fc_vport_create,
2377 .vport_delete = bnx2fc_vport_destroy,
2378 .vport_disable = bnx2fc_vport_disable,
2379 };
2380
2381 static struct fc_function_template bnx2fc_vport_xport_function = {
2382 .show_host_node_name = 1,
2383 .show_host_port_name = 1,
2384 .show_host_supported_classes = 1,
2385 .show_host_supported_fc4s = 1,
2386 .show_host_active_fc4s = 1,
2387 .show_host_maxframe_size = 1,
2388
2389 .show_host_port_id = 1,
2390 .show_host_supported_speeds = 1,
2391 .get_host_speed = fc_get_host_speed,
2392 .show_host_speed = 1,
2393 .show_host_port_type = 1,
2394 .get_host_port_state = fc_get_host_port_state,
2395 .show_host_port_state = 1,
2396 .show_host_symbolic_name = 1,
2397
2398 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2399 sizeof(struct bnx2fc_rport)),
2400 .show_rport_maxframe_size = 1,
2401 .show_rport_supported_classes = 1,
2402
2403 .show_host_fabric_name = 1,
2404 .show_starget_node_name = 1,
2405 .show_starget_port_name = 1,
2406 .show_starget_port_id = 1,
2407 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2408 .show_rport_dev_loss_tmo = 1,
2409 .get_fc_host_stats = fc_get_host_stats,
2410 .issue_fc_host_lip = bnx2fc_fcoe_reset,
2411 .terminate_rport_io = fc_rport_terminate_io,
2412 };
2413
2414 /**
2415 * scsi_host_template structure used while registering with SCSI-ml
2416 */
2417 static struct scsi_host_template bnx2fc_shost_template = {
2418 .module = THIS_MODULE,
2419 .name = "Broadcom Offload FCoE Initiator",
2420 .queuecommand = bnx2fc_queuecommand,
2421 .eh_abort_handler = bnx2fc_eh_abort, /* abts */
2422 .eh_device_reset_handler = bnx2fc_eh_device_reset, /* lun reset */
2423 .eh_target_reset_handler = bnx2fc_eh_target_reset, /* tgt reset */
2424 .eh_host_reset_handler = fc_eh_host_reset,
2425 .slave_alloc = fc_slave_alloc,
2426 .change_queue_depth = fc_change_queue_depth,
2427 .change_queue_type = fc_change_queue_type,
2428 .this_id = -1,
2429 .cmd_per_lun = 3,
2430 .can_queue = BNX2FC_CAN_QUEUE,
2431 .use_clustering = ENABLE_CLUSTERING,
2432 .sg_tablesize = BNX2FC_MAX_BDS_PER_CMD,
2433 .max_sectors = 512,
2434 };
2435
2436 static struct libfc_function_template bnx2fc_libfc_fcn_templ = {
2437 .frame_send = bnx2fc_xmit,
2438 .elsct_send = bnx2fc_elsct_send,
2439 .fcp_abort_io = bnx2fc_abort_io,
2440 .fcp_cleanup = bnx2fc_cleanup,
2441 .rport_event_callback = bnx2fc_rport_event_handler,
2442 };
2443
2444 /**
2445 * bnx2fc_cnic_cb - global template of bnx2fc - cnic driver interface
2446 * structure carrying callback function pointers
2447 */
2448 static struct cnic_ulp_ops bnx2fc_cnic_cb = {
2449 .owner = THIS_MODULE,
2450 .cnic_init = bnx2fc_ulp_init,
2451 .cnic_exit = bnx2fc_ulp_exit,
2452 .cnic_start = bnx2fc_ulp_start,
2453 .cnic_stop = bnx2fc_ulp_stop,
2454 .indicate_kcqes = bnx2fc_indicate_kcqe,
2455 .indicate_netevent = bnx2fc_indicate_netevent,
2456 };
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