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Add linux-next specific files for 20110831
[linux-2.6/next.git] / drivers / scsi / bnx2fc / bnx2fc_fcoe.c
blobdaded5a6d066eaecffcab8d628a5a3f2f287f92e
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 "Aug 03, 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 void __bnx2fc_destroy(struct bnx2fc_interface *interface);
60 static int bnx2fc_destroy(struct net_device *net_device);
61 static int bnx2fc_enable(struct net_device *netdev);
62 static int bnx2fc_disable(struct net_device *netdev);
63
64 static void bnx2fc_recv_frame(struct sk_buff *skb);
65
66 static void bnx2fc_start_disc(struct bnx2fc_interface *interface);
67 static int bnx2fc_shost_config(struct fc_lport *lport, struct device *dev);
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 inline void bnx2fc_interface_put(struct bnx2fc_interface *interface);
82 static struct bnx2fc_hba *bnx2fc_find_hba_for_cnic(struct cnic_dev *cnic);
83
84 static int bnx2fc_fw_init(struct bnx2fc_hba *hba);
85 static void bnx2fc_fw_destroy(struct bnx2fc_hba *hba);
86
87 static void bnx2fc_port_shutdown(struct fc_lport *lport);
88 static void bnx2fc_stop(struct bnx2fc_interface *interface);
89 static int __init bnx2fc_mod_init(void);
90 static void __exit bnx2fc_mod_exit(void);
91
92 unsigned int bnx2fc_debug_level;
93 module_param_named(debug_logging, bnx2fc_debug_level, int, S_IRUGO|S_IWUSR);
94
95 static int bnx2fc_cpu_callback(struct notifier_block *nfb,
96 unsigned long action, void *hcpu);
97 /* notification function for CPU hotplug events */
98 static struct notifier_block bnx2fc_cpu_notifier = {
99 .notifier_call = bnx2fc_cpu_callback,
100 };
101
102 static void bnx2fc_clean_rx_queue(struct fc_lport *lp)
103 {
104 struct fcoe_percpu_s *bg;
105 struct fcoe_rcv_info *fr;
106 struct sk_buff_head *list;
107 struct sk_buff *skb, *next;
108 struct sk_buff *head;
109
110 bg = &bnx2fc_global;
111 spin_lock_bh(&bg->fcoe_rx_list.lock);
112 list = &bg->fcoe_rx_list;
113 head = list->next;
114 for (skb = head; skb != (struct sk_buff *)list;
115 skb = next) {
116 next = skb->next;
117 fr = fcoe_dev_from_skb(skb);
118 if (fr->fr_dev == lp) {
119 __skb_unlink(skb, list);
120 kfree_skb(skb);
121 }
122 }
123 spin_unlock_bh(&bg->fcoe_rx_list.lock);
124 }
125
126 int bnx2fc_get_paged_crc_eof(struct sk_buff *skb, int tlen)
127 {
128 int rc;
129 spin_lock(&bnx2fc_global_lock);
130 rc = fcoe_get_paged_crc_eof(skb, tlen, &bnx2fc_global);
131 spin_unlock(&bnx2fc_global_lock);
132
133 return rc;
134 }
135
136 static void bnx2fc_abort_io(struct fc_lport *lport)
137 {
138 /*
139 * This function is no-op for bnx2fc, but we do
140 * not want to leave it as NULL either, as libfc
141 * can call the default function which is
142 * fc_fcp_abort_io.
143 */
144 }
145
146 static void bnx2fc_cleanup(struct fc_lport *lport)
147 {
148 struct fcoe_port *port = lport_priv(lport);
149 struct bnx2fc_interface *interface = port->priv;
150 struct bnx2fc_hba *hba = interface->hba;
151 struct bnx2fc_rport *tgt;
152 int i;
153
154 BNX2FC_MISC_DBG("Entered %s\n", __func__);
155 mutex_lock(&hba->hba_mutex);
156 spin_lock_bh(&hba->hba_lock);
157 for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
158 tgt = hba->tgt_ofld_list[i];
159 if (tgt) {
160 /* Cleanup IOs belonging to requested vport */
161 if (tgt->port == port) {
162 spin_unlock_bh(&hba->hba_lock);
163 BNX2FC_TGT_DBG(tgt, "flush/cleanup\n");
164 bnx2fc_flush_active_ios(tgt);
165 spin_lock_bh(&hba->hba_lock);
166 }
167 }
168 }
169 spin_unlock_bh(&hba->hba_lock);
170 mutex_unlock(&hba->hba_mutex);
171 }
172
173 static int bnx2fc_xmit_l2_frame(struct bnx2fc_rport *tgt,
174 struct fc_frame *fp)
175 {
176 struct fc_rport_priv *rdata = tgt->rdata;
177 struct fc_frame_header *fh;
178 int rc = 0;
179
180 fh = fc_frame_header_get(fp);
181 BNX2FC_TGT_DBG(tgt, "Xmit L2 frame rport = 0x%x, oxid = 0x%x, "
182 "r_ctl = 0x%x\n", rdata->ids.port_id,
183 ntohs(fh->fh_ox_id), fh->fh_r_ctl);
184 if ((fh->fh_type == FC_TYPE_ELS) &&
185 (fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
186
187 switch (fc_frame_payload_op(fp)) {
188 case ELS_ADISC:
189 rc = bnx2fc_send_adisc(tgt, fp);
190 break;
191 case ELS_LOGO:
192 rc = bnx2fc_send_logo(tgt, fp);
193 break;
194 case ELS_RLS:
195 rc = bnx2fc_send_rls(tgt, fp);
196 break;
197 default:
198 break;
199 }
200 } else if ((fh->fh_type == FC_TYPE_BLS) &&
201 (fh->fh_r_ctl == FC_RCTL_BA_ABTS))
202 BNX2FC_TGT_DBG(tgt, "ABTS frame\n");
203 else {
204 BNX2FC_TGT_DBG(tgt, "Send L2 frame type 0x%x "
205 "rctl 0x%x thru non-offload path\n",
206 fh->fh_type, fh->fh_r_ctl);
207 return -ENODEV;
208 }
209 if (rc)
210 return -ENOMEM;
211 else
212 return 0;
213 }
214
215 /**
216 * bnx2fc_xmit - bnx2fc's FCoE frame transmit function
217 *
218 * @lport: the associated local port
219 * @fp: the fc_frame to be transmitted
220 */
221 static int bnx2fc_xmit(struct fc_lport *lport, struct fc_frame *fp)
222 {
223 struct ethhdr *eh;
224 struct fcoe_crc_eof *cp;
225 struct sk_buff *skb;
226 struct fc_frame_header *fh;
227 struct bnx2fc_interface *interface;
228 struct bnx2fc_hba *hba;
229 struct fcoe_port *port;
230 struct fcoe_hdr *hp;
231 struct bnx2fc_rport *tgt;
232 struct fcoe_dev_stats *stats;
233 u8 sof, eof;
234 u32 crc;
235 unsigned int hlen, tlen, elen;
236 int wlen, rc = 0;
237
238 port = (struct fcoe_port *)lport_priv(lport);
239 interface = port->priv;
240 hba = interface->hba;
241
242 fh = fc_frame_header_get(fp);
243
244 skb = fp_skb(fp);
245 if (!lport->link_up) {
246 BNX2FC_HBA_DBG(lport, "bnx2fc_xmit link down\n");
247 kfree_skb(skb);
248 return 0;
249 }
250
251 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
252 if (!interface->ctlr.sel_fcf) {
253 BNX2FC_HBA_DBG(lport, "FCF not selected yet!\n");
254 kfree_skb(skb);
255 return -EINVAL;
256 }
257 if (fcoe_ctlr_els_send(&interface->ctlr, lport, skb))
258 return 0;
259 }
260
261 sof = fr_sof(fp);
262 eof = fr_eof(fp);
263
264 /*
265 * Snoop the frame header to check if the frame is for
266 * an offloaded session
267 */
268 /*
269 * tgt_ofld_list access is synchronized using
270 * both hba mutex and hba lock. Atleast hba mutex or
271 * hba lock needs to be held for read access.
272 */
273
274 spin_lock_bh(&hba->hba_lock);
275 tgt = bnx2fc_tgt_lookup(port, ntoh24(fh->fh_d_id));
276 if (tgt && (test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
277 /* This frame is for offloaded session */
278 BNX2FC_HBA_DBG(lport, "xmit: Frame is for offloaded session "
279 "port_id = 0x%x\n", ntoh24(fh->fh_d_id));
280 spin_unlock_bh(&hba->hba_lock);
281 rc = bnx2fc_xmit_l2_frame(tgt, fp);
282 if (rc != -ENODEV) {
283 kfree_skb(skb);
284 return rc;
285 }
286 } else {
287 spin_unlock_bh(&hba->hba_lock);
288 }
289
290 elen = sizeof(struct ethhdr);
291 hlen = sizeof(struct fcoe_hdr);
292 tlen = sizeof(struct fcoe_crc_eof);
293 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
294
295 skb->ip_summed = CHECKSUM_NONE;
296 crc = fcoe_fc_crc(fp);
297
298 /* copy port crc and eof to the skb buff */
299 if (skb_is_nonlinear(skb)) {
300 skb_frag_t *frag;
301 if (bnx2fc_get_paged_crc_eof(skb, tlen)) {
302 kfree_skb(skb);
303 return -ENOMEM;
304 }
305 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
306 cp = kmap_atomic(skb_frag_page(frag), KM_SKB_DATA_SOFTIRQ)
307 + frag->page_offset;
308 } else {
309 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
310 }
311
312 memset(cp, 0, sizeof(*cp));
313 cp->fcoe_eof = eof;
314 cp->fcoe_crc32 = cpu_to_le32(~crc);
315 if (skb_is_nonlinear(skb)) {
316 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
317 cp = NULL;
318 }
319
320 /* adjust skb network/transport offsets to match mac/fcoe/port */
321 skb_push(skb, elen + hlen);
322 skb_reset_mac_header(skb);
323 skb_reset_network_header(skb);
324 skb->mac_len = elen;
325 skb->protocol = htons(ETH_P_FCOE);
326 skb->dev = interface->netdev;
327
328 /* fill up mac and fcoe headers */
329 eh = eth_hdr(skb);
330 eh->h_proto = htons(ETH_P_FCOE);
331 if (interface->ctlr.map_dest)
332 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
333 else
334 /* insert GW address */
335 memcpy(eh->h_dest, interface->ctlr.dest_addr, ETH_ALEN);
336
337 if (unlikely(interface->ctlr.flogi_oxid != FC_XID_UNKNOWN))
338 memcpy(eh->h_source, interface->ctlr.ctl_src_addr, ETH_ALEN);
339 else
340 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
341
342 hp = (struct fcoe_hdr *)(eh + 1);
343 memset(hp, 0, sizeof(*hp));
344 if (FC_FCOE_VER)
345 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
346 hp->fcoe_sof = sof;
347
348 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
349 if (lport->seq_offload && fr_max_payload(fp)) {
350 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
351 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
352 } else {
353 skb_shinfo(skb)->gso_type = 0;
354 skb_shinfo(skb)->gso_size = 0;
355 }
356
357 /*update tx stats */
358 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
359 stats->TxFrames++;
360 stats->TxWords += wlen;
361 put_cpu();
362
363 /* send down to lld */
364 fr_dev(fp) = lport;
365 if (port->fcoe_pending_queue.qlen)
366 fcoe_check_wait_queue(lport, skb);
367 else if (fcoe_start_io(skb))
368 fcoe_check_wait_queue(lport, skb);
369
370 return 0;
371 }
372
373 /**
374 * bnx2fc_rcv - This is bnx2fc's receive function called by NET_RX_SOFTIRQ
375 *
376 * @skb: the receive socket buffer
377 * @dev: associated net device
378 * @ptype: context
379 * @olddev: last device
380 *
381 * This function receives the packet and builds FC frame and passes it up
382 */
383 static int bnx2fc_rcv(struct sk_buff *skb, struct net_device *dev,
384 struct packet_type *ptype, struct net_device *olddev)
385 {
386 struct fc_lport *lport;
387 struct bnx2fc_interface *interface;
388 struct fc_frame_header *fh;
389 struct fcoe_rcv_info *fr;
390 struct fcoe_percpu_s *bg;
391 unsigned short oxid;
392
393 interface = container_of(ptype, struct bnx2fc_interface,
394 fcoe_packet_type);
395 lport = interface->ctlr.lp;
396
397 if (unlikely(lport == NULL)) {
398 printk(KERN_ERR PFX "bnx2fc_rcv: lport is NULL\n");
399 goto err;
400 }
401
402 if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
403 printk(KERN_ERR PFX "bnx2fc_rcv: Wrong FC type frame\n");
404 goto err;
405 }
406
407 /*
408 * Check for minimum frame length, and make sure required FCoE
409 * and FC headers are pulled into the linear data area.
410 */
411 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
412 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
413 goto err;
414
415 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
416 fh = (struct fc_frame_header *) skb_transport_header(skb);
417
418 oxid = ntohs(fh->fh_ox_id);
419
420 fr = fcoe_dev_from_skb(skb);
421 fr->fr_dev = lport;
422
423 bg = &bnx2fc_global;
424 spin_lock_bh(&bg->fcoe_rx_list.lock);
425
426 __skb_queue_tail(&bg->fcoe_rx_list, skb);
427 if (bg->fcoe_rx_list.qlen == 1)
428 wake_up_process(bg->thread);
429
430 spin_unlock_bh(&bg->fcoe_rx_list.lock);
431
432 return 0;
433 err:
434 kfree_skb(skb);
435 return -1;
436 }
437
438 static int bnx2fc_l2_rcv_thread(void *arg)
439 {
440 struct fcoe_percpu_s *bg = arg;
441 struct sk_buff *skb;
442
443 set_user_nice(current, -20);
444 set_current_state(TASK_INTERRUPTIBLE);
445 while (!kthread_should_stop()) {
446 schedule();
447 spin_lock_bh(&bg->fcoe_rx_list.lock);
448 while ((skb = __skb_dequeue(&bg->fcoe_rx_list)) != NULL) {
449 spin_unlock_bh(&bg->fcoe_rx_list.lock);
450 bnx2fc_recv_frame(skb);
451 spin_lock_bh(&bg->fcoe_rx_list.lock);
452 }
453 __set_current_state(TASK_INTERRUPTIBLE);
454 spin_unlock_bh(&bg->fcoe_rx_list.lock);
455 }
456 __set_current_state(TASK_RUNNING);
457 return 0;
458 }
459
460
461 static void bnx2fc_recv_frame(struct sk_buff *skb)
462 {
463 u32 fr_len;
464 struct fc_lport *lport;
465 struct fcoe_rcv_info *fr;
466 struct fcoe_dev_stats *stats;
467 struct fc_frame_header *fh;
468 struct fcoe_crc_eof crc_eof;
469 struct fc_frame *fp;
470 struct fc_lport *vn_port;
471 struct fcoe_port *port;
472 u8 *mac = NULL;
473 u8 *dest_mac = NULL;
474 struct fcoe_hdr *hp;
475
476 fr = fcoe_dev_from_skb(skb);
477 lport = fr->fr_dev;
478 if (unlikely(lport == NULL)) {
479 printk(KERN_ERR PFX "Invalid lport struct\n");
480 kfree_skb(skb);
481 return;
482 }
483
484 if (skb_is_nonlinear(skb))
485 skb_linearize(skb);
486 mac = eth_hdr(skb)->h_source;
487 dest_mac = eth_hdr(skb)->h_dest;
488
489 /* Pull the header */
490 hp = (struct fcoe_hdr *) skb_network_header(skb);
491 fh = (struct fc_frame_header *) skb_transport_header(skb);
492 skb_pull(skb, sizeof(struct fcoe_hdr));
493 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
494
495 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
496 stats->RxFrames++;
497 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
498
499 fp = (struct fc_frame *)skb;
500 fc_frame_init(fp);
501 fr_dev(fp) = lport;
502 fr_sof(fp) = hp->fcoe_sof;
503 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
504 put_cpu();
505 kfree_skb(skb);
506 return;
507 }
508 fr_eof(fp) = crc_eof.fcoe_eof;
509 fr_crc(fp) = crc_eof.fcoe_crc32;
510 if (pskb_trim(skb, fr_len)) {
511 put_cpu();
512 kfree_skb(skb);
513 return;
514 }
515
516 fh = fc_frame_header_get(fp);
517
518 vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
519 if (vn_port) {
520 port = lport_priv(vn_port);
521 if (compare_ether_addr(port->data_src_addr, dest_mac)
522 != 0) {
523 BNX2FC_HBA_DBG(lport, "fpma mismatch\n");
524 put_cpu();
525 kfree_skb(skb);
526 return;
527 }
528 }
529 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
530 fh->fh_type == FC_TYPE_FCP) {
531 /* Drop FCP data. We dont this in L2 path */
532 put_cpu();
533 kfree_skb(skb);
534 return;
535 }
536 if (fh->fh_r_ctl == FC_RCTL_ELS_REQ &&
537 fh->fh_type == FC_TYPE_ELS) {
538 switch (fc_frame_payload_op(fp)) {
539 case ELS_LOGO:
540 if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
541 /* drop non-FIP LOGO */
542 put_cpu();
543 kfree_skb(skb);
544 return;
545 }
546 break;
547 }
548 }
549
550 if (fh->fh_r_ctl == FC_RCTL_BA_ABTS) {
551 /* Drop incoming ABTS */
552 put_cpu();
553 kfree_skb(skb);
554 return;
555 }
556
557 if (le32_to_cpu(fr_crc(fp)) !=
558 ~crc32(~0, skb->data, fr_len)) {
559 if (stats->InvalidCRCCount < 5)
560 printk(KERN_WARNING PFX "dropping frame with "
561 "CRC error\n");
562 stats->InvalidCRCCount++;
563 put_cpu();
564 kfree_skb(skb);
565 return;
566 }
567 put_cpu();
568 fc_exch_recv(lport, fp);
569 }
570
571 /**
572 * bnx2fc_percpu_io_thread - thread per cpu for ios
573 *
574 * @arg: ptr to bnx2fc_percpu_info structure
575 */
576 int bnx2fc_percpu_io_thread(void *arg)
577 {
578 struct bnx2fc_percpu_s *p = arg;
579 struct bnx2fc_work *work, *tmp;
580 LIST_HEAD(work_list);
581
582 set_user_nice(current, -20);
583 set_current_state(TASK_INTERRUPTIBLE);
584 while (!kthread_should_stop()) {
585 schedule();
586 spin_lock_bh(&p->fp_work_lock);
587 while (!list_empty(&p->work_list)) {
588 list_splice_init(&p->work_list, &work_list);
589 spin_unlock_bh(&p->fp_work_lock);
590
591 list_for_each_entry_safe(work, tmp, &work_list, list) {
592 list_del_init(&work->list);
593 bnx2fc_process_cq_compl(work->tgt, work->wqe);
594 kfree(work);
595 }
596
597 spin_lock_bh(&p->fp_work_lock);
598 }
599 __set_current_state(TASK_INTERRUPTIBLE);
600 spin_unlock_bh(&p->fp_work_lock);
601 }
602 __set_current_state(TASK_RUNNING);
603
604 return 0;
605 }
606
607 static struct fc_host_statistics *bnx2fc_get_host_stats(struct Scsi_Host *shost)
608 {
609 struct fc_host_statistics *bnx2fc_stats;
610 struct fc_lport *lport = shost_priv(shost);
611 struct fcoe_port *port = lport_priv(lport);
612 struct bnx2fc_interface *interface = port->priv;
613 struct bnx2fc_hba *hba = interface->hba;
614 struct fcoe_statistics_params *fw_stats;
615 int rc = 0;
616
617 fw_stats = (struct fcoe_statistics_params *)hba->stats_buffer;
618 if (!fw_stats)
619 return NULL;
620
621 bnx2fc_stats = fc_get_host_stats(shost);
622
623 init_completion(&hba->stat_req_done);
624 if (bnx2fc_send_stat_req(hba))
625 return bnx2fc_stats;
626 rc = wait_for_completion_timeout(&hba->stat_req_done, (2 * HZ));
627 if (!rc) {
628 BNX2FC_HBA_DBG(lport, "FW stat req timed out\n");
629 return bnx2fc_stats;
630 }
631 bnx2fc_stats->invalid_crc_count += fw_stats->rx_stat2.fc_crc_cnt;
632 bnx2fc_stats->tx_frames += fw_stats->tx_stat.fcoe_tx_pkt_cnt;
633 bnx2fc_stats->tx_words += (fw_stats->tx_stat.fcoe_tx_byte_cnt) / 4;
634 bnx2fc_stats->rx_frames += fw_stats->rx_stat0.fcoe_rx_pkt_cnt;
635 bnx2fc_stats->rx_words += (fw_stats->rx_stat0.fcoe_rx_byte_cnt) / 4;
636
637 bnx2fc_stats->dumped_frames = 0;
638 bnx2fc_stats->lip_count = 0;
639 bnx2fc_stats->nos_count = 0;
640 bnx2fc_stats->loss_of_sync_count = 0;
641 bnx2fc_stats->loss_of_signal_count = 0;
642 bnx2fc_stats->prim_seq_protocol_err_count = 0;
643
644 return bnx2fc_stats;
645 }
646
647 static int bnx2fc_shost_config(struct fc_lport *lport, struct device *dev)
648 {
649 struct fcoe_port *port = lport_priv(lport);
650 struct bnx2fc_interface *interface = port->priv;
651 struct Scsi_Host *shost = lport->host;
652 int rc = 0;
653
654 shost->max_cmd_len = BNX2FC_MAX_CMD_LEN;
655 shost->max_lun = BNX2FC_MAX_LUN;
656 shost->max_id = BNX2FC_MAX_FCP_TGT;
657 shost->max_channel = 0;
658 if (lport->vport)
659 shost->transportt = bnx2fc_vport_xport_template;
660 else
661 shost->transportt = bnx2fc_transport_template;
662
663 /* Add the new host to SCSI-ml */
664 rc = scsi_add_host(lport->host, dev);
665 if (rc) {
666 printk(KERN_ERR PFX "Error on scsi_add_host\n");
667 return rc;
668 }
669 if (!lport->vport)
670 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
671 sprintf(fc_host_symbolic_name(lport->host), "%s v%s over %s",
672 BNX2FC_NAME, BNX2FC_VERSION,
673 interface->netdev->name);
674
675 return 0;
676 }
677
678 static void bnx2fc_link_speed_update(struct fc_lport *lport)
679 {
680 struct fcoe_port *port = lport_priv(lport);
681 struct bnx2fc_interface *interface = port->priv;
682 struct net_device *netdev = interface->netdev;
683 struct ethtool_cmd ecmd;
684
685 if (!dev_ethtool_get_settings(netdev, &ecmd)) {
686 lport->link_supported_speeds &=
687 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
688 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
689 SUPPORTED_1000baseT_Full))
690 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
691 if (ecmd.supported & SUPPORTED_10000baseT_Full)
692 lport->link_supported_speeds |= FC_PORTSPEED_10GBIT;
693
694 switch (ethtool_cmd_speed(&ecmd)) {
695 case SPEED_1000:
696 lport->link_speed = FC_PORTSPEED_1GBIT;
697 break;
698 case SPEED_2500:
699 lport->link_speed = FC_PORTSPEED_2GBIT;
700 break;
701 case SPEED_10000:
702 lport->link_speed = FC_PORTSPEED_10GBIT;
703 break;
704 }
705 }
706 }
707 static int bnx2fc_link_ok(struct fc_lport *lport)
708 {
709 struct fcoe_port *port = lport_priv(lport);
710 struct bnx2fc_interface *interface = port->priv;
711 struct bnx2fc_hba *hba = interface->hba;
712 struct net_device *dev = hba->phys_dev;
713 int rc = 0;
714
715 if ((dev->flags & IFF_UP) && netif_carrier_ok(dev))
716 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
717 else {
718 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
719 rc = -1;
720 }
721 return rc;
722 }
723
724 /**
725 * bnx2fc_get_link_state - get network link state
726 *
727 * @hba: adapter instance pointer
728 *
729 * updates adapter structure flag based on netdev state
730 */
731 void bnx2fc_get_link_state(struct bnx2fc_hba *hba)
732 {
733 if (test_bit(__LINK_STATE_NOCARRIER, &hba->phys_dev->state))
734 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
735 else
736 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
737 }
738
739 static int bnx2fc_net_config(struct fc_lport *lport, struct net_device *netdev)
740 {
741 struct bnx2fc_hba *hba;
742 struct bnx2fc_interface *interface;
743 struct fcoe_port *port;
744 u64 wwnn, wwpn;
745
746 port = lport_priv(lport);
747 interface = port->priv;
748 hba = interface->hba;
749
750 /* require support for get_pauseparam ethtool op. */
751 if (!hba->phys_dev->ethtool_ops ||
752 !hba->phys_dev->ethtool_ops->get_pauseparam)
753 return -EOPNOTSUPP;
754
755 if (fc_set_mfs(lport, BNX2FC_MFS))
756 return -EINVAL;
757
758 skb_queue_head_init(&port->fcoe_pending_queue);
759 port->fcoe_pending_queue_active = 0;
760 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long) lport);
761
762 bnx2fc_link_speed_update(lport);
763
764 if (!lport->vport) {
765 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
766 wwnn = fcoe_wwn_from_mac(interface->ctlr.ctl_src_addr,
767 1, 0);
768 BNX2FC_HBA_DBG(lport, "WWNN = 0x%llx\n", wwnn);
769 fc_set_wwnn(lport, wwnn);
770
771 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
772 wwpn = fcoe_wwn_from_mac(interface->ctlr.ctl_src_addr,
773 2, 0);
774
775 BNX2FC_HBA_DBG(lport, "WWPN = 0x%llx\n", wwpn);
776 fc_set_wwpn(lport, wwpn);
777 }
778
779 return 0;
780 }
781
782 static void bnx2fc_destroy_timer(unsigned long data)
783 {
784 struct bnx2fc_hba *hba = (struct bnx2fc_hba *)data;
785
786 printk(KERN_ERR PFX "ERROR:bnx2fc_destroy_timer - "
787 "Destroy compl not received!!\n");
788 set_bit(BNX2FC_FLAG_DESTROY_CMPL, &hba->flags);
789 wake_up_interruptible(&hba->destroy_wait);
790 }
791
792 /**
793 * bnx2fc_indicate_netevent - Generic netdev event handler
794 *
795 * @context: adapter structure pointer
796 * @event: event type
797 * @vlan_id: vlan id - associated vlan id with this event
798 *
799 * Handles NETDEV_UP, NETDEV_DOWN, NETDEV_GOING_DOWN,NETDEV_CHANGE and
800 * NETDEV_CHANGE_MTU events. Handle NETDEV_UNREGISTER only for vlans.
801 */
802 static void bnx2fc_indicate_netevent(void *context, unsigned long event,
803 u16 vlan_id)
804 {
805 struct bnx2fc_hba *hba = (struct bnx2fc_hba *)context;
806 struct fc_lport *lport;
807 struct fc_lport *vport;
808 struct bnx2fc_interface *interface, *tmp;
809 int wait_for_upload = 0;
810 u32 link_possible = 1;
811
812 if (vlan_id != 0 && event != NETDEV_UNREGISTER)
813 return;
814
815 switch (event) {
816 case NETDEV_UP:
817 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
818 printk(KERN_ERR "indicate_netevent: "\
819 "hba is not UP!!\n");
820 break;
821
822 case NETDEV_DOWN:
823 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
824 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
825 link_possible = 0;
826 break;
827
828 case NETDEV_GOING_DOWN:
829 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
830 link_possible = 0;
831 break;
832
833 case NETDEV_CHANGE:
834 break;
835
836 case NETDEV_UNREGISTER:
837 if (!vlan_id)
838 return;
839 mutex_lock(&bnx2fc_dev_lock);
840 list_for_each_entry_safe(interface, tmp, &if_list, list) {
841 if (interface->hba != hba)
842 continue;
843 __bnx2fc_destroy(interface);
844 }
845 mutex_unlock(&bnx2fc_dev_lock);
846 return;
847
848 default:
849 printk(KERN_ERR PFX "Unkonwn netevent %ld", event);
850 return;
851 }
852
853 mutex_lock(&bnx2fc_dev_lock);
854 list_for_each_entry(interface, &if_list, list) {
855
856 if (interface->hba != hba)
857 continue;
858
859 lport = interface->ctlr.lp;
860 BNX2FC_HBA_DBG(lport, "netevent handler - event=%s %ld\n",
861 interface->netdev->name, event);
862
863 bnx2fc_link_speed_update(lport);
864
865 if (link_possible && !bnx2fc_link_ok(lport)) {
866 printk(KERN_ERR "indicate_netevent: ctlr_link_up\n");
867 fcoe_ctlr_link_up(&interface->ctlr);
868 } else if (fcoe_ctlr_link_down(&interface->ctlr)) {
869 mutex_lock(&lport->lp_mutex);
870 list_for_each_entry(vport, &lport->vports, list)
871 fc_host_port_type(vport->host) =
872 FC_PORTTYPE_UNKNOWN;
873 mutex_unlock(&lport->lp_mutex);
874 fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;
875 per_cpu_ptr(lport->dev_stats,
876 get_cpu())->LinkFailureCount++;
877 put_cpu();
878 fcoe_clean_pending_queue(lport);
879 wait_for_upload = 1;
880 }
881 }
882 mutex_unlock(&bnx2fc_dev_lock);
883
884 if (wait_for_upload) {
885 clear_bit(ADAPTER_STATE_READY, &hba->adapter_state);
886 init_waitqueue_head(&hba->shutdown_wait);
887 BNX2FC_MISC_DBG("indicate_netevent "
888 "num_ofld_sess = %d\n",
889 hba->num_ofld_sess);
890 hba->wait_for_link_down = 1;
891 wait_event_interruptible(hba->shutdown_wait,
892 (hba->num_ofld_sess == 0));
893 BNX2FC_MISC_DBG("wakeup - num_ofld_sess = %d\n",
894 hba->num_ofld_sess);
895 hba->wait_for_link_down = 0;
896
897 if (signal_pending(current))
898 flush_signals(current);
899 }
900 }
901
902 static int bnx2fc_libfc_config(struct fc_lport *lport)
903 {
904
905 /* Set the function pointers set by bnx2fc driver */
906 memcpy(&lport->tt, &bnx2fc_libfc_fcn_templ,
907 sizeof(struct libfc_function_template));
908 fc_elsct_init(lport);
909 fc_exch_init(lport);
910 fc_rport_init(lport);
911 fc_disc_init(lport);
912 return 0;
913 }
914
915 static int bnx2fc_em_config(struct fc_lport *lport)
916 {
917 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, FCOE_MIN_XID,
918 FCOE_MAX_XID, NULL)) {
919 printk(KERN_ERR PFX "em_config:fc_exch_mgr_alloc failed\n");
920 return -ENOMEM;
921 }
922
923 return 0;
924 }
925
926 static int bnx2fc_lport_config(struct fc_lport *lport)
927 {
928 lport->link_up = 0;
929 lport->qfull = 0;
930 lport->max_retry_count = 3;
931 lport->max_rport_retry_count = 3;
932 lport->e_d_tov = 2 * 1000;
933 lport->r_a_tov = 10 * 1000;
934
935 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
936 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
937 lport->does_npiv = 1;
938
939 memset(&lport->rnid_gen, 0, sizeof(struct fc_els_rnid_gen));
940 lport->rnid_gen.rnid_atype = BNX2FC_RNID_HBA;
941
942 /* alloc stats structure */
943 if (fc_lport_init_stats(lport))
944 return -ENOMEM;
945
946 /* Finish fc_lport configuration */
947 fc_lport_config(lport);
948
949 return 0;
950 }
951
952 /**
953 * bnx2fc_fip_recv - handle a received FIP frame.
954 *
955 * @skb: the received skb
956 * @dev: associated &net_device
957 * @ptype: the &packet_type structure which was used to register this handler.
958 * @orig_dev: original receive &net_device, in case @ dev is a bond.
959 *
960 * Returns: 0 for success
961 */
962 static int bnx2fc_fip_recv(struct sk_buff *skb, struct net_device *dev,
963 struct packet_type *ptype,
964 struct net_device *orig_dev)
965 {
966 struct bnx2fc_interface *interface;
967 interface = container_of(ptype, struct bnx2fc_interface,
968 fip_packet_type);
969 fcoe_ctlr_recv(&interface->ctlr, skb);
970 return 0;
971 }
972
973 /**
974 * bnx2fc_update_src_mac - Update Ethernet MAC filters.
975 *
976 * @fip: FCoE controller.
977 * @old: Unicast MAC address to delete if the MAC is non-zero.
978 * @new: Unicast MAC address to add.
979 *
980 * Remove any previously-set unicast MAC filter.
981 * Add secondary FCoE MAC address filter for our OUI.
982 */
983 static void bnx2fc_update_src_mac(struct fc_lport *lport, u8 *addr)
984 {
985 struct fcoe_port *port = lport_priv(lport);
986
987 memcpy(port->data_src_addr, addr, ETH_ALEN);
988 }
989
990 /**
991 * bnx2fc_get_src_mac - return the ethernet source address for an lport
992 *
993 * @lport: libfc port
994 */
995 static u8 *bnx2fc_get_src_mac(struct fc_lport *lport)
996 {
997 struct fcoe_port *port;
998
999 port = (struct fcoe_port *)lport_priv(lport);
1000 return port->data_src_addr;
1001 }
1002
1003 /**
1004 * bnx2fc_fip_send - send an Ethernet-encapsulated FIP frame.
1005 *
1006 * @fip: FCoE controller.
1007 * @skb: FIP Packet.
1008 */
1009 static void bnx2fc_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
1010 {
1011 skb->dev = bnx2fc_from_ctlr(fip)->netdev;
1012 dev_queue_xmit(skb);
1013 }
1014
1015 static int bnx2fc_vport_create(struct fc_vport *vport, bool disabled)
1016 {
1017 struct Scsi_Host *shost = vport_to_shost(vport);
1018 struct fc_lport *n_port = shost_priv(shost);
1019 struct fcoe_port *port = lport_priv(n_port);
1020 struct bnx2fc_interface *interface = port->priv;
1021 struct net_device *netdev = interface->netdev;
1022 struct fc_lport *vn_port;
1023 int rc;
1024 char buf[32];
1025
1026 rc = fcoe_validate_vport_create(vport);
1027 if (rc) {
1028 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
1029 printk(KERN_ERR PFX "Failed to create vport, "
1030 "WWPN (0x%s) already exists\n",
1031 buf);
1032 return rc;
1033 }
1034
1035 if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &interface->hba->flags)) {
1036 printk(KERN_ERR PFX "vn ports cannot be created on"
1037 "this interface\n");
1038 return -EIO;
1039 }
1040 mutex_lock(&bnx2fc_dev_lock);
1041 vn_port = bnx2fc_if_create(interface, &vport->dev, 1);
1042 mutex_unlock(&bnx2fc_dev_lock);
1043
1044 if (IS_ERR(vn_port)) {
1045 printk(KERN_ERR PFX "bnx2fc_vport_create (%s) failed\n",
1046 netdev->name);
1047 return -EIO;
1048 }
1049
1050 if (disabled) {
1051 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1052 } else {
1053 vn_port->boot_time = jiffies;
1054 fc_lport_init(vn_port);
1055 fc_fabric_login(vn_port);
1056 fc_vport_setlink(vn_port);
1057 }
1058 return 0;
1059 }
1060
1061 static void bnx2fc_free_vport(struct bnx2fc_hba *hba, struct fc_lport *lport)
1062 {
1063 struct bnx2fc_lport *blport, *tmp;
1064
1065 spin_lock_bh(&hba->hba_lock);
1066 list_for_each_entry_safe(blport, tmp, &hba->vports, list) {
1067 if (blport->lport == lport) {
1068 list_del(&blport->list);
1069 kfree(blport);
1070 }
1071 }
1072 spin_unlock_bh(&hba->hba_lock);
1073 }
1074
1075 static int bnx2fc_vport_destroy(struct fc_vport *vport)
1076 {
1077 struct Scsi_Host *shost = vport_to_shost(vport);
1078 struct fc_lport *n_port = shost_priv(shost);
1079 struct fc_lport *vn_port = vport->dd_data;
1080 struct fcoe_port *port = lport_priv(vn_port);
1081 struct bnx2fc_interface *interface = port->priv;
1082 struct fc_lport *v_port;
1083 bool found = false;
1084
1085 mutex_lock(&n_port->lp_mutex);
1086 list_for_each_entry(v_port, &n_port->vports, list)
1087 if (v_port->vport == vport) {
1088 found = true;
1089 break;
1090 }
1091
1092 if (!found) {
1093 mutex_unlock(&n_port->lp_mutex);
1094 return -ENOENT;
1095 }
1096 list_del(&vn_port->list);
1097 mutex_unlock(&n_port->lp_mutex);
1098 bnx2fc_free_vport(interface->hba, port->lport);
1099 bnx2fc_port_shutdown(port->lport);
1100 bnx2fc_interface_put(interface);
1101 queue_work(bnx2fc_wq, &port->destroy_work);
1102 return 0;
1103 }
1104
1105 static int bnx2fc_vport_disable(struct fc_vport *vport, bool disable)
1106 {
1107 struct fc_lport *lport = vport->dd_data;
1108
1109 if (disable) {
1110 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1111 fc_fabric_logoff(lport);
1112 } else {
1113 lport->boot_time = jiffies;
1114 fc_fabric_login(lport);
1115 fc_vport_setlink(lport);
1116 }
1117 return 0;
1118 }
1119
1120
1121 static int bnx2fc_interface_setup(struct bnx2fc_interface *interface)
1122 {
1123 struct net_device *netdev = interface->netdev;
1124 struct net_device *physdev = interface->hba->phys_dev;
1125 struct netdev_hw_addr *ha;
1126 int sel_san_mac = 0;
1127
1128 /* setup Source MAC Address */
1129 rcu_read_lock();
1130 for_each_dev_addr(physdev, ha) {
1131 BNX2FC_MISC_DBG("net_config: ha->type = %d, fip_mac = ",
1132 ha->type);
1133 printk(KERN_INFO "%2x:%2x:%2x:%2x:%2x:%2x\n", ha->addr[0],
1134 ha->addr[1], ha->addr[2], ha->addr[3],
1135 ha->addr[4], ha->addr[5]);
1136
1137 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
1138 (is_valid_ether_addr(ha->addr))) {
1139 memcpy(interface->ctlr.ctl_src_addr, ha->addr,
1140 ETH_ALEN);
1141 sel_san_mac = 1;
1142 BNX2FC_MISC_DBG("Found SAN MAC\n");
1143 }
1144 }
1145 rcu_read_unlock();
1146
1147 if (!sel_san_mac)
1148 return -ENODEV;
1149
1150 interface->fip_packet_type.func = bnx2fc_fip_recv;
1151 interface->fip_packet_type.type = htons(ETH_P_FIP);
1152 interface->fip_packet_type.dev = netdev;
1153 dev_add_pack(&interface->fip_packet_type);
1154
1155 interface->fcoe_packet_type.func = bnx2fc_rcv;
1156 interface->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
1157 interface->fcoe_packet_type.dev = netdev;
1158 dev_add_pack(&interface->fcoe_packet_type);
1159
1160 return 0;
1161 }
1162
1163 static int bnx2fc_attach_transport(void)
1164 {
1165 bnx2fc_transport_template =
1166 fc_attach_transport(&bnx2fc_transport_function);
1167
1168 if (bnx2fc_transport_template == NULL) {
1169 printk(KERN_ERR PFX "Failed to attach FC transport\n");
1170 return -ENODEV;
1171 }
1172
1173 bnx2fc_vport_xport_template =
1174 fc_attach_transport(&bnx2fc_vport_xport_function);
1175 if (bnx2fc_vport_xport_template == NULL) {
1176 printk(KERN_ERR PFX
1177 "Failed to attach FC transport for vport\n");
1178 fc_release_transport(bnx2fc_transport_template);
1179 bnx2fc_transport_template = NULL;
1180 return -ENODEV;
1181 }
1182 return 0;
1183 }
1184 static void bnx2fc_release_transport(void)
1185 {
1186 fc_release_transport(bnx2fc_transport_template);
1187 fc_release_transport(bnx2fc_vport_xport_template);
1188 bnx2fc_transport_template = NULL;
1189 bnx2fc_vport_xport_template = NULL;
1190 }
1191
1192 static void bnx2fc_interface_release(struct kref *kref)
1193 {
1194 struct bnx2fc_interface *interface;
1195 struct net_device *netdev;
1196
1197 interface = container_of(kref, struct bnx2fc_interface, kref);
1198 BNX2FC_MISC_DBG("Interface is being released\n");
1199
1200 netdev = interface->netdev;
1201
1202 /* tear-down FIP controller */
1203 if (test_and_clear_bit(BNX2FC_CTLR_INIT_DONE, &interface->if_flags))
1204 fcoe_ctlr_destroy(&interface->ctlr);
1205
1206 kfree(interface);
1207
1208 dev_put(netdev);
1209 module_put(THIS_MODULE);
1210 }
1211
1212 static inline void bnx2fc_interface_get(struct bnx2fc_interface *interface)
1213 {
1214 kref_get(&interface->kref);
1215 }
1216
1217 static inline void bnx2fc_interface_put(struct bnx2fc_interface *interface)
1218 {
1219 kref_put(&interface->kref, bnx2fc_interface_release);
1220 }
1221 static void bnx2fc_hba_destroy(struct bnx2fc_hba *hba)
1222 {
1223 /* Free the command manager */
1224 if (hba->cmd_mgr) {
1225 bnx2fc_cmd_mgr_free(hba->cmd_mgr);
1226 hba->cmd_mgr = NULL;
1227 }
1228 kfree(hba->tgt_ofld_list);
1229 bnx2fc_unbind_pcidev(hba);
1230 kfree(hba);
1231 }
1232
1233 /**
1234 * bnx2fc_hba_create - create a new bnx2fc hba
1235 *
1236 * @cnic: pointer to cnic device
1237 *
1238 * Creates a new FCoE hba on the given device.
1239 *
1240 */
1241 static struct bnx2fc_hba *bnx2fc_hba_create(struct cnic_dev *cnic)
1242 {
1243 struct bnx2fc_hba *hba;
1244 int rc;
1245
1246 hba = kzalloc(sizeof(*hba), GFP_KERNEL);
1247 if (!hba) {
1248 printk(KERN_ERR PFX "Unable to allocate hba structure\n");
1249 return NULL;
1250 }
1251 spin_lock_init(&hba->hba_lock);
1252 mutex_init(&hba->hba_mutex);
1253
1254 hba->cnic = cnic;
1255 rc = bnx2fc_bind_pcidev(hba);
1256 if (rc) {
1257 printk(KERN_ERR PFX "create_adapter: bind error\n");
1258 goto bind_err;
1259 }
1260 hba->phys_dev = cnic->netdev;
1261 hba->next_conn_id = 0;
1262
1263 hba->tgt_ofld_list =
1264 kzalloc(sizeof(struct bnx2fc_rport *) * BNX2FC_NUM_MAX_SESS,
1265 GFP_KERNEL);
1266 if (!hba->tgt_ofld_list) {
1267 printk(KERN_ERR PFX "Unable to allocate tgt offload list\n");
1268 goto tgtofld_err;
1269 }
1270
1271 hba->num_ofld_sess = 0;
1272
1273 hba->cmd_mgr = bnx2fc_cmd_mgr_alloc(hba, BNX2FC_MIN_XID,
1274 BNX2FC_MAX_XID);
1275 if (!hba->cmd_mgr) {
1276 printk(KERN_ERR PFX "em_config:bnx2fc_cmd_mgr_alloc failed\n");
1277 goto cmgr_err;
1278 }
1279
1280 init_waitqueue_head(&hba->shutdown_wait);
1281 init_waitqueue_head(&hba->destroy_wait);
1282 INIT_LIST_HEAD(&hba->vports);
1283
1284 return hba;
1285
1286 cmgr_err:
1287 kfree(hba->tgt_ofld_list);
1288 tgtofld_err:
1289 bnx2fc_unbind_pcidev(hba);
1290 bind_err:
1291 kfree(hba);
1292 return NULL;
1293 }
1294
1295 struct bnx2fc_interface *bnx2fc_interface_create(struct bnx2fc_hba *hba,
1296 struct net_device *netdev,
1297 enum fip_state fip_mode)
1298 {
1299 struct bnx2fc_interface *interface;
1300 int rc = 0;
1301
1302 interface = kzalloc(sizeof(*interface), GFP_KERNEL);
1303 if (!interface) {
1304 printk(KERN_ERR PFX "Unable to allocate interface structure\n");
1305 return NULL;
1306 }
1307 dev_hold(netdev);
1308 kref_init(&interface->kref);
1309 interface->hba = hba;
1310 interface->netdev = netdev;
1311
1312 /* Initialize FIP */
1313 fcoe_ctlr_init(&interface->ctlr, fip_mode);
1314 interface->ctlr.send = bnx2fc_fip_send;
1315 interface->ctlr.update_mac = bnx2fc_update_src_mac;
1316 interface->ctlr.get_src_addr = bnx2fc_get_src_mac;
1317 set_bit(BNX2FC_CTLR_INIT_DONE, &interface->if_flags);
1318
1319 rc = bnx2fc_interface_setup(interface);
1320 if (!rc)
1321 return interface;
1322
1323 fcoe_ctlr_destroy(&interface->ctlr);
1324 dev_put(netdev);
1325 kfree(interface);
1326 return NULL;
1327 }
1328
1329 /**
1330 * bnx2fc_if_create - Create FCoE instance on a given interface
1331 *
1332 * @interface: FCoE interface to create a local port on
1333 * @parent: Device pointer to be the parent in sysfs for the SCSI host
1334 * @npiv: Indicates if the port is vport or not
1335 *
1336 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1337 *
1338 * Returns: Allocated fc_lport or an error pointer
1339 */
1340 static struct fc_lport *bnx2fc_if_create(struct bnx2fc_interface *interface,
1341 struct device *parent, int npiv)
1342 {
1343 struct fc_lport *lport, *n_port;
1344 struct fcoe_port *port;
1345 struct Scsi_Host *shost;
1346 struct fc_vport *vport = dev_to_vport(parent);
1347 struct bnx2fc_lport *blport;
1348 struct bnx2fc_hba *hba;
1349 int rc = 0;
1350
1351 blport = kzalloc(sizeof(struct bnx2fc_lport), GFP_KERNEL);
1352 if (!blport) {
1353 BNX2FC_HBA_DBG(interface->ctlr.lp, "Unable to alloc blport\n");
1354 return NULL;
1355 }
1356
1357 /* Allocate Scsi_Host structure */
1358 if (!npiv)
1359 lport = libfc_host_alloc(&bnx2fc_shost_template, sizeof(*port));
1360 else
1361 lport = libfc_vport_create(vport, sizeof(*port));
1362
1363 if (!lport) {
1364 printk(KERN_ERR PFX "could not allocate scsi host structure\n");
1365 goto free_blport;
1366 }
1367 shost = lport->host;
1368 port = lport_priv(lport);
1369 port->lport = lport;
1370 port->priv = interface;
1371 INIT_WORK(&port->destroy_work, bnx2fc_destroy_work);
1372
1373 /* Configure fcoe_port */
1374 rc = bnx2fc_lport_config(lport);
1375 if (rc)
1376 goto lp_config_err;
1377
1378 if (npiv) {
1379 printk(KERN_ERR PFX "Setting vport names, 0x%llX 0x%llX\n",
1380 vport->node_name, vport->port_name);
1381 fc_set_wwnn(lport, vport->node_name);
1382 fc_set_wwpn(lport, vport->port_name);
1383 }
1384 /* Configure netdev and networking properties of the lport */
1385 rc = bnx2fc_net_config(lport, interface->netdev);
1386 if (rc) {
1387 printk(KERN_ERR PFX "Error on bnx2fc_net_config\n");
1388 goto lp_config_err;
1389 }
1390
1391 rc = bnx2fc_shost_config(lport, parent);
1392 if (rc) {
1393 printk(KERN_ERR PFX "Couldnt configure shost for %s\n",
1394 interface->netdev->name);
1395 goto lp_config_err;
1396 }
1397
1398 /* Initialize the libfc library */
1399 rc = bnx2fc_libfc_config(lport);
1400 if (rc) {
1401 printk(KERN_ERR PFX "Couldnt configure libfc\n");
1402 goto shost_err;
1403 }
1404 fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;
1405
1406 /* Allocate exchange manager */
1407 if (!npiv)
1408 rc = bnx2fc_em_config(lport);
1409 else {
1410 shost = vport_to_shost(vport);
1411 n_port = shost_priv(shost);
1412 rc = fc_exch_mgr_list_clone(n_port, lport);
1413 }
1414
1415 if (rc) {
1416 printk(KERN_ERR PFX "Error on bnx2fc_em_config\n");
1417 goto shost_err;
1418 }
1419
1420 bnx2fc_interface_get(interface);
1421
1422 hba = interface->hba;
1423 spin_lock_bh(&hba->hba_lock);
1424 blport->lport = lport;
1425 list_add_tail(&blport->list, &hba->vports);
1426 spin_unlock_bh(&hba->hba_lock);
1427
1428 return lport;
1429
1430 shost_err:
1431 scsi_remove_host(shost);
1432 lp_config_err:
1433 scsi_host_put(lport->host);
1434 free_blport:
1435 kfree(blport);
1436 return NULL;
1437 }
1438
1439 static void bnx2fc_interface_cleanup(struct bnx2fc_interface *interface)
1440 {
1441 struct fc_lport *lport = interface->ctlr.lp;
1442 struct fcoe_port *port = lport_priv(lport);
1443 struct bnx2fc_hba *hba = interface->hba;
1444
1445 /* Stop the transmit retry timer */
1446 del_timer_sync(&port->timer);
1447
1448 /* Free existing transmit skbs */
1449 fcoe_clean_pending_queue(lport);
1450
1451 /* Dont listen for Ethernet packets anymore */
1452 __dev_remove_pack(&interface->fcoe_packet_type);
1453 __dev_remove_pack(&interface->fip_packet_type);
1454 synchronize_net();
1455
1456 bnx2fc_free_vport(hba, lport);
1457 }
1458
1459 static void bnx2fc_if_destroy(struct fc_lport *lport)
1460 {
1461
1462 /* Free queued packets for the receive thread */
1463 bnx2fc_clean_rx_queue(lport);
1464
1465 /* Detach from scsi-ml */
1466 fc_remove_host(lport->host);
1467 scsi_remove_host(lport->host);
1468
1469 /*
1470 * Note that only the physical lport will have the exchange manager.
1471 * for vports, this function is NOP
1472 */
1473 fc_exch_mgr_free(lport);
1474
1475 /* Free memory used by statistical counters */
1476 fc_lport_free_stats(lport);
1477
1478 /* Release Scsi_Host */
1479 scsi_host_put(lport->host);
1480 }
1481
1482 static void __bnx2fc_destroy(struct bnx2fc_interface *interface)
1483 {
1484 struct fc_lport *lport = interface->ctlr.lp;
1485
1486 bnx2fc_interface_cleanup(interface);
1487 bnx2fc_stop(interface);
1488 list_del(&interface->list);
1489 lport = interface->ctlr.lp;
1490 bnx2fc_interface_put(interface);
1491 bnx2fc_if_destroy(lport);
1492 }
1493
1494 /**
1495 * bnx2fc_destroy - Destroy a bnx2fc FCoE interface
1496 *
1497 * @buffer: The name of the Ethernet interface to be destroyed
1498 * @kp: The associated kernel parameter
1499 *
1500 * Called from sysfs.
1501 *
1502 * Returns: 0 for success
1503 */
1504 static int bnx2fc_destroy(struct net_device *netdev)
1505 {
1506 struct bnx2fc_interface *interface = NULL;
1507 int rc = 0;
1508
1509 rtnl_lock();
1510 mutex_lock(&bnx2fc_dev_lock);
1511
1512 interface = bnx2fc_interface_lookup(netdev);
1513 if (!interface || !interface->ctlr.lp) {
1514 rc = -ENODEV;
1515 printk(KERN_ERR PFX "bnx2fc_destroy: interface or lport not found\n");
1516 goto netdev_err;
1517 }
1518
1519
1520 destroy_workqueue(interface->timer_work_queue);
1521 __bnx2fc_destroy(interface);
1522
1523 netdev_err:
1524 mutex_unlock(&bnx2fc_dev_lock);
1525 rtnl_unlock();
1526 return rc;
1527 }
1528
1529 static void bnx2fc_destroy_work(struct work_struct *work)
1530 {
1531 struct fcoe_port *port;
1532 struct fc_lport *lport;
1533
1534 port = container_of(work, struct fcoe_port, destroy_work);
1535 lport = port->lport;
1536
1537 BNX2FC_HBA_DBG(lport, "Entered bnx2fc_destroy_work\n");
1538
1539 rtnl_lock();
1540 mutex_lock(&bnx2fc_dev_lock);
1541 bnx2fc_if_destroy(lport);
1542 mutex_unlock(&bnx2fc_dev_lock);
1543 rtnl_unlock();
1544 }
1545
1546 static void bnx2fc_unbind_adapter_devices(struct bnx2fc_hba *hba)
1547 {
1548 bnx2fc_free_fw_resc(hba);
1549 bnx2fc_free_task_ctx(hba);
1550 }
1551
1552 /**
1553 * bnx2fc_bind_adapter_devices - binds bnx2fc adapter with the associated
1554 * pci structure
1555 *
1556 * @hba: Adapter instance
1557 */
1558 static int bnx2fc_bind_adapter_devices(struct bnx2fc_hba *hba)
1559 {
1560 if (bnx2fc_setup_task_ctx(hba))
1561 goto mem_err;
1562
1563 if (bnx2fc_setup_fw_resc(hba))
1564 goto mem_err;
1565
1566 return 0;
1567 mem_err:
1568 bnx2fc_unbind_adapter_devices(hba);
1569 return -ENOMEM;
1570 }
1571
1572 static int bnx2fc_bind_pcidev(struct bnx2fc_hba *hba)
1573 {
1574 struct cnic_dev *cnic;
1575
1576 if (!hba->cnic) {
1577 printk(KERN_ERR PFX "cnic is NULL\n");
1578 return -ENODEV;
1579 }
1580 cnic = hba->cnic;
1581 hba->pcidev = cnic->pcidev;
1582 if (hba->pcidev)
1583 pci_dev_get(hba->pcidev);
1584
1585 return 0;
1586 }
1587
1588 static void bnx2fc_unbind_pcidev(struct bnx2fc_hba *hba)
1589 {
1590 if (hba->pcidev)
1591 pci_dev_put(hba->pcidev);
1592 hba->pcidev = NULL;
1593 }
1594
1595
1596
1597 /**
1598 * bnx2fc_ulp_start - cnic callback to initialize & start adapter instance
1599 *
1600 * @handle: transport handle pointing to adapter struture
1601 *
1602 * This function maps adapter structure to pcidev structure and initiates
1603 * firmware handshake to enable/initialize on-chip FCoE components.
1604 * This bnx2fc - cnic interface api callback is used after following
1605 * conditions are met -
1606 * a) underlying network interface is up (marked by event NETDEV_UP
1607 * from netdev
1608 * b) bnx2fc adatper structure is registered.
1609 */
1610 static void bnx2fc_ulp_start(void *handle)
1611 {
1612 struct bnx2fc_hba *hba = handle;
1613 struct bnx2fc_interface *interface;
1614 struct fc_lport *lport;
1615
1616 mutex_lock(&bnx2fc_dev_lock);
1617
1618 if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags))
1619 bnx2fc_fw_init(hba);
1620
1621 BNX2FC_MISC_DBG("bnx2fc started.\n");
1622
1623 list_for_each_entry(interface, &if_list, list) {
1624 if (interface->hba == hba) {
1625 lport = interface->ctlr.lp;
1626 /* Kick off Fabric discovery*/
1627 printk(KERN_ERR PFX "ulp_init: start discovery\n");
1628 lport->tt.frame_send = bnx2fc_xmit;
1629 bnx2fc_start_disc(interface);
1630 }
1631 }
1632
1633 mutex_unlock(&bnx2fc_dev_lock);
1634 }
1635
1636 static void bnx2fc_port_shutdown(struct fc_lport *lport)
1637 {
1638 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1639 fc_fabric_logoff(lport);
1640 fc_lport_destroy(lport);
1641 }
1642
1643 static void bnx2fc_stop(struct bnx2fc_interface *interface)
1644 {
1645 struct fc_lport *lport;
1646 struct fc_lport *vport;
1647
1648 if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &interface->hba->flags))
1649 return;
1650
1651 lport = interface->ctlr.lp;
1652 bnx2fc_port_shutdown(lport);
1653
1654 mutex_lock(&lport->lp_mutex);
1655 list_for_each_entry(vport, &lport->vports, list)
1656 fc_host_port_type(vport->host) =
1657 FC_PORTTYPE_UNKNOWN;
1658 mutex_unlock(&lport->lp_mutex);
1659 fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;
1660 fcoe_ctlr_link_down(&interface->ctlr);
1661 fcoe_clean_pending_queue(lport);
1662 }
1663
1664 static int bnx2fc_fw_init(struct bnx2fc_hba *hba)
1665 {
1666 #define BNX2FC_INIT_POLL_TIME (1000 / HZ)
1667 int rc = -1;
1668 int i = HZ;
1669
1670 rc = bnx2fc_bind_adapter_devices(hba);
1671 if (rc) {
1672 printk(KERN_ALERT PFX
1673 "bnx2fc_bind_adapter_devices failed - rc = %d\n", rc);
1674 goto err_out;
1675 }
1676
1677 rc = bnx2fc_send_fw_fcoe_init_msg(hba);
1678 if (rc) {
1679 printk(KERN_ALERT PFX
1680 "bnx2fc_send_fw_fcoe_init_msg failed - rc = %d\n", rc);
1681 goto err_unbind;
1682 }
1683
1684 /*
1685 * Wait until the adapter init message is complete, and adapter
1686 * state is UP.
1687 */
1688 while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--)
1689 msleep(BNX2FC_INIT_POLL_TIME);
1690
1691 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) {
1692 printk(KERN_ERR PFX "bnx2fc_start: %s failed to initialize. "
1693 "Ignoring...\n",
1694 hba->cnic->netdev->name);
1695 rc = -1;
1696 goto err_unbind;
1697 }
1698
1699
1700 set_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags);
1701 return 0;
1702
1703 err_unbind:
1704 bnx2fc_unbind_adapter_devices(hba);
1705 err_out:
1706 return rc;
1707 }
1708
1709 static void bnx2fc_fw_destroy(struct bnx2fc_hba *hba)
1710 {
1711 if (test_and_clear_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags)) {
1712 if (bnx2fc_send_fw_fcoe_destroy_msg(hba) == 0) {
1713 init_timer(&hba->destroy_timer);
1714 hba->destroy_timer.expires = BNX2FC_FW_TIMEOUT +
1715 jiffies;
1716 hba->destroy_timer.function = bnx2fc_destroy_timer;
1717 hba->destroy_timer.data = (unsigned long)hba;
1718 add_timer(&hba->destroy_timer);
1719 wait_event_interruptible(hba->destroy_wait,
1720 test_bit(BNX2FC_FLAG_DESTROY_CMPL,
1721 &hba->flags));
1722 clear_bit(BNX2FC_FLAG_DESTROY_CMPL, &hba->flags);
1723 /* This should never happen */
1724 if (signal_pending(current))
1725 flush_signals(current);
1726
1727 del_timer_sync(&hba->destroy_timer);
1728 }
1729 bnx2fc_unbind_adapter_devices(hba);
1730 }
1731 }
1732
1733 /**
1734 * bnx2fc_ulp_stop - cnic callback to shutdown adapter instance
1735 *
1736 * @handle: transport handle pointing to adapter structure
1737 *
1738 * Driver checks if adapter is already in shutdown mode, if not start
1739 * the shutdown process.
1740 */
1741 static void bnx2fc_ulp_stop(void *handle)
1742 {
1743 struct bnx2fc_hba *hba = handle;
1744 struct bnx2fc_interface *interface;
1745
1746 printk(KERN_ERR "ULP_STOP\n");
1747
1748 mutex_lock(&bnx2fc_dev_lock);
1749 if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags))
1750 goto exit;
1751 list_for_each_entry(interface, &if_list, list) {
1752 if (interface->hba == hba)
1753 bnx2fc_stop(interface);
1754 }
1755 BUG_ON(hba->num_ofld_sess != 0);
1756
1757 mutex_lock(&hba->hba_mutex);
1758 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
1759 clear_bit(ADAPTER_STATE_GOING_DOWN,
1760 &hba->adapter_state);
1761
1762 clear_bit(ADAPTER_STATE_READY, &hba->adapter_state);
1763 mutex_unlock(&hba->hba_mutex);
1764
1765 bnx2fc_fw_destroy(hba);
1766 exit:
1767 mutex_unlock(&bnx2fc_dev_lock);
1768 }
1769
1770 static void bnx2fc_start_disc(struct bnx2fc_interface *interface)
1771 {
1772 struct fc_lport *lport;
1773 int wait_cnt = 0;
1774
1775 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1776 /* Kick off FIP/FLOGI */
1777 if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &interface->hba->flags)) {
1778 printk(KERN_ERR PFX "Init not done yet\n");
1779 return;
1780 }
1781
1782 lport = interface->ctlr.lp;
1783 BNX2FC_HBA_DBG(lport, "calling fc_fabric_login\n");
1784
1785 if (!bnx2fc_link_ok(lport)) {
1786 BNX2FC_HBA_DBG(lport, "ctlr_link_up\n");
1787 fcoe_ctlr_link_up(&interface->ctlr);
1788 fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1789 set_bit(ADAPTER_STATE_READY, &interface->hba->adapter_state);
1790 }
1791
1792 /* wait for the FCF to be selected before issuing FLOGI */
1793 while (!interface->ctlr.sel_fcf) {
1794 msleep(250);
1795 /* give up after 3 secs */
1796 if (++wait_cnt > 12)
1797 break;
1798 }
1799
1800 /* Reset max receive frame size to default */
1801 if (fc_set_mfs(lport, BNX2FC_MFS))
1802 return;
1803
1804 fc_lport_init(lport);
1805 fc_fabric_login(lport);
1806 }
1807
1808
1809 /**
1810 * bnx2fc_ulp_init - Initialize an adapter instance
1811 *
1812 * @dev : cnic device handle
1813 * Called from cnic_register_driver() context to initialize all
1814 * enumerated cnic devices. This routine allocates adapter structure
1815 * and other device specific resources.
1816 */
1817 static void bnx2fc_ulp_init(struct cnic_dev *dev)
1818 {
1819 struct bnx2fc_hba *hba;
1820 int rc = 0;
1821
1822 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1823 /* bnx2fc works only when bnx2x is loaded */
1824 if (!test_bit(CNIC_F_BNX2X_CLASS, &dev->flags) ||
1825 (dev->max_fcoe_conn == 0)) {
1826 printk(KERN_ERR PFX "bnx2fc FCoE not supported on %s,"
1827 " flags: %lx fcoe_conn: %d\n",
1828 dev->netdev->name, dev->flags, dev->max_fcoe_conn);
1829 return;
1830 }
1831
1832 hba = bnx2fc_hba_create(dev);
1833 if (!hba) {
1834 printk(KERN_ERR PFX "hba initialization failed\n");
1835 return;
1836 }
1837
1838 /* Add HBA to the adapter list */
1839 mutex_lock(&bnx2fc_dev_lock);
1840 list_add_tail(&hba->list, &adapter_list);
1841 adapter_count++;
1842 mutex_unlock(&bnx2fc_dev_lock);
1843
1844 clear_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic);
1845 rc = dev->register_device(dev, CNIC_ULP_FCOE,
1846 (void *) hba);
1847 if (rc)
1848 printk(KERN_ERR PFX "register_device failed, rc = %d\n", rc);
1849 else
1850 set_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic);
1851 }
1852
1853
1854 static int bnx2fc_disable(struct net_device *netdev)
1855 {
1856 struct bnx2fc_interface *interface;
1857 int rc = 0;
1858
1859 rtnl_lock();
1860 mutex_lock(&bnx2fc_dev_lock);
1861
1862 interface = bnx2fc_interface_lookup(netdev);
1863 if (!interface || !interface->ctlr.lp) {
1864 rc = -ENODEV;
1865 printk(KERN_ERR PFX "bnx2fc_disable: interface or lport not found\n");
1866 } else {
1867 fcoe_ctlr_link_down(&interface->ctlr);
1868 fcoe_clean_pending_queue(interface->ctlr.lp);
1869 }
1870
1871 mutex_unlock(&bnx2fc_dev_lock);
1872 rtnl_unlock();
1873 return rc;
1874 }
1875
1876
1877 static int bnx2fc_enable(struct net_device *netdev)
1878 {
1879 struct bnx2fc_interface *interface;
1880 int rc = 0;
1881
1882 rtnl_lock();
1883 mutex_lock(&bnx2fc_dev_lock);
1884
1885 interface = bnx2fc_interface_lookup(netdev);
1886 if (!interface || !interface->ctlr.lp) {
1887 rc = -ENODEV;
1888 printk(KERN_ERR PFX "bnx2fc_enable: interface or lport not found\n");
1889 } else if (!bnx2fc_link_ok(interface->ctlr.lp))
1890 fcoe_ctlr_link_up(&interface->ctlr);
1891
1892 mutex_unlock(&bnx2fc_dev_lock);
1893 rtnl_unlock();
1894 return rc;
1895 }
1896
1897 /**
1898 * bnx2fc_create - Create bnx2fc FCoE interface
1899 *
1900 * @buffer: The name of Ethernet interface to create on
1901 * @kp: The associated kernel param
1902 *
1903 * Called from sysfs.
1904 *
1905 * Returns: 0 for success
1906 */
1907 static int bnx2fc_create(struct net_device *netdev, enum fip_state fip_mode)
1908 {
1909 struct bnx2fc_interface *interface;
1910 struct bnx2fc_hba *hba;
1911 struct net_device *phys_dev;
1912 struct fc_lport *lport;
1913 struct ethtool_drvinfo drvinfo;
1914 int rc = 0;
1915 int vlan_id;
1916
1917 BNX2FC_MISC_DBG("Entered bnx2fc_create\n");
1918 if (fip_mode != FIP_MODE_FABRIC) {
1919 printk(KERN_ERR "fip mode not FABRIC\n");
1920 return -EIO;
1921 }
1922
1923 rtnl_lock();
1924
1925 mutex_lock(&bnx2fc_dev_lock);
1926
1927 if (!try_module_get(THIS_MODULE)) {
1928 rc = -EINVAL;
1929 goto mod_err;
1930 }
1931
1932 /* obtain physical netdev */
1933 if (netdev->priv_flags & IFF_802_1Q_VLAN) {
1934 phys_dev = vlan_dev_real_dev(netdev);
1935 vlan_id = vlan_dev_vlan_id(netdev);
1936 } else {
1937 printk(KERN_ERR PFX "Not a vlan device\n");
1938 rc = -EINVAL;
1939 goto netdev_err;
1940 }
1941 /* verify if the physical device is a netxtreme2 device */
1942 if (phys_dev->ethtool_ops && phys_dev->ethtool_ops->get_drvinfo) {
1943 memset(&drvinfo, 0, sizeof(drvinfo));
1944 phys_dev->ethtool_ops->get_drvinfo(phys_dev, &drvinfo);
1945 if (strncmp(drvinfo.driver, "bnx2x", strlen("bnx2x"))) {
1946 printk(KERN_ERR PFX "Not a netxtreme2 device\n");
1947 rc = -EINVAL;
1948 goto netdev_err;
1949 }
1950 } else {
1951 printk(KERN_ERR PFX "unable to obtain drv_info\n");
1952 rc = -EINVAL;
1953 goto netdev_err;
1954 }
1955
1956 /* obtain interface and initialize rest of the structure */
1957 hba = bnx2fc_hba_lookup(phys_dev);
1958 if (!hba) {
1959 rc = -ENODEV;
1960 printk(KERN_ERR PFX "bnx2fc_create: hba not found\n");
1961 goto netdev_err;
1962 }
1963
1964 if (bnx2fc_interface_lookup(netdev)) {
1965 rc = -EEXIST;
1966 goto netdev_err;
1967 }
1968
1969 interface = bnx2fc_interface_create(hba, netdev, fip_mode);
1970 if (!interface) {
1971 printk(KERN_ERR PFX "bnx2fc_interface_create failed\n");
1972 goto ifput_err;
1973 }
1974
1975 interface->vlan_id = vlan_id;
1976 interface->vlan_enabled = 1;
1977
1978 interface->timer_work_queue =
1979 create_singlethread_workqueue("bnx2fc_timer_wq");
1980 if (!interface->timer_work_queue) {
1981 printk(KERN_ERR PFX "ulp_init could not create timer_wq\n");
1982 rc = -EINVAL;
1983 goto ifput_err;
1984 }
1985
1986 lport = bnx2fc_if_create(interface, &interface->hba->pcidev->dev, 0);
1987 if (!lport) {
1988 printk(KERN_ERR PFX "Failed to create interface (%s)\n",
1989 netdev->name);
1990 bnx2fc_interface_cleanup(interface);
1991 rc = -EINVAL;
1992 goto if_create_err;
1993 }
1994
1995 /* Add interface to if_list */
1996 list_add_tail(&interface->list, &if_list);
1997
1998 lport->boot_time = jiffies;
1999
2000 /* Make this master N_port */
2001 interface->ctlr.lp = lport;
2002
2003 BNX2FC_HBA_DBG(lport, "create: START DISC\n");
2004 bnx2fc_start_disc(interface);
2005 /*
2006 * Release from kref_init in bnx2fc_interface_setup, on success
2007 * lport should be holding a reference taken in bnx2fc_if_create
2008 */
2009 bnx2fc_interface_put(interface);
2010 /* put netdev that was held while calling dev_get_by_name */
2011 mutex_unlock(&bnx2fc_dev_lock);
2012 rtnl_unlock();
2013 return 0;
2014
2015 if_create_err:
2016 destroy_workqueue(interface->timer_work_queue);
2017 ifput_err:
2018 bnx2fc_interface_put(interface);
2019 netdev_err:
2020 module_put(THIS_MODULE);
2021 mod_err:
2022 mutex_unlock(&bnx2fc_dev_lock);
2023 rtnl_unlock();
2024 return rc;
2025 }
2026
2027 /**
2028 * bnx2fc_find_hba_for_cnic - maps cnic instance to bnx2fc hba instance
2029 *
2030 * @cnic: Pointer to cnic device instance
2031 *
2032 **/
2033 static struct bnx2fc_hba *bnx2fc_find_hba_for_cnic(struct cnic_dev *cnic)
2034 {
2035 struct list_head *list;
2036 struct list_head *temp;
2037 struct bnx2fc_hba *hba;
2038
2039 /* Called with bnx2fc_dev_lock held */
2040 list_for_each_safe(list, temp, &adapter_list) {
2041 hba = (struct bnx2fc_hba *)list;
2042 if (hba->cnic == cnic)
2043 return hba;
2044 }
2045 return NULL;
2046 }
2047
2048 static struct bnx2fc_interface *bnx2fc_interface_lookup(struct net_device
2049 *netdev)
2050 {
2051 struct bnx2fc_interface *interface;
2052
2053 /* Called with bnx2fc_dev_lock held */
2054 list_for_each_entry(interface, &if_list, list) {
2055 if (interface->netdev == netdev)
2056 return interface;
2057 }
2058 return NULL;
2059 }
2060
2061 static struct bnx2fc_hba *bnx2fc_hba_lookup(struct net_device
2062 *phys_dev)
2063 {
2064 struct bnx2fc_hba *hba;
2065
2066 /* Called with bnx2fc_dev_lock held */
2067 list_for_each_entry(hba, &adapter_list, list) {
2068 if (hba->phys_dev == phys_dev)
2069 return hba;
2070 }
2071 printk(KERN_ERR PFX "adapter_lookup: hba NULL\n");
2072 return NULL;
2073 }
2074
2075 /**
2076 * bnx2fc_ulp_exit - shuts down adapter instance and frees all resources
2077 *
2078 * @dev cnic device handle
2079 */
2080 static void bnx2fc_ulp_exit(struct cnic_dev *dev)
2081 {
2082 struct bnx2fc_hba *hba;
2083 struct bnx2fc_interface *interface, *tmp;
2084
2085 BNX2FC_MISC_DBG("Entered bnx2fc_ulp_exit\n");
2086
2087 if (!test_bit(CNIC_F_BNX2X_CLASS, &dev->flags)) {
2088 printk(KERN_ERR PFX "bnx2fc port check: %s, flags: %lx\n",
2089 dev->netdev->name, dev->flags);
2090 return;
2091 }
2092
2093 mutex_lock(&bnx2fc_dev_lock);
2094 hba = bnx2fc_find_hba_for_cnic(dev);
2095 if (!hba) {
2096 printk(KERN_ERR PFX "bnx2fc_ulp_exit: hba not found, dev 0%p\n",
2097 dev);
2098 mutex_unlock(&bnx2fc_dev_lock);
2099 return;
2100 }
2101
2102 list_del_init(&hba->list);
2103 adapter_count--;
2104
2105 list_for_each_entry_safe(interface, tmp, &if_list, list)
2106 /* destroy not called yet, move to quiesced list */
2107 if (interface->hba == hba)
2108 __bnx2fc_destroy(interface);
2109 mutex_unlock(&bnx2fc_dev_lock);
2110
2111 bnx2fc_ulp_stop(hba);
2112 /* unregister cnic device */
2113 if (test_and_clear_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic))
2114 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_FCOE);
2115 bnx2fc_hba_destroy(hba);
2116 }
2117
2118 /**
2119 * bnx2fc_fcoe_reset - Resets the fcoe
2120 *
2121 * @shost: shost the reset is from
2122 *
2123 * Returns: always 0
2124 */
2125 static int bnx2fc_fcoe_reset(struct Scsi_Host *shost)
2126 {
2127 struct fc_lport *lport = shost_priv(shost);
2128 fc_lport_reset(lport);
2129 return 0;
2130 }
2131
2132
2133 static bool bnx2fc_match(struct net_device *netdev)
2134 {
2135 mutex_lock(&bnx2fc_dev_lock);
2136 if (netdev->priv_flags & IFF_802_1Q_VLAN) {
2137 struct net_device *phys_dev = vlan_dev_real_dev(netdev);
2138
2139 if (bnx2fc_hba_lookup(phys_dev)) {
2140 mutex_unlock(&bnx2fc_dev_lock);
2141 return true;
2142 }
2143 }
2144 mutex_unlock(&bnx2fc_dev_lock);
2145 return false;
2146 }
2147
2148
2149 static struct fcoe_transport bnx2fc_transport = {
2150 .name = {"bnx2fc"},
2151 .attached = false,
2152 .list = LIST_HEAD_INIT(bnx2fc_transport.list),
2153 .match = bnx2fc_match,
2154 .create = bnx2fc_create,
2155 .destroy = bnx2fc_destroy,
2156 .enable = bnx2fc_enable,
2157 .disable = bnx2fc_disable,
2158 };
2159
2160 /**
2161 * bnx2fc_percpu_thread_create - Create a receive thread for an
2162 * online CPU
2163 *
2164 * @cpu: cpu index for the online cpu
2165 */
2166 static void bnx2fc_percpu_thread_create(unsigned int cpu)
2167 {
2168 struct bnx2fc_percpu_s *p;
2169 struct task_struct *thread;
2170
2171 p = &per_cpu(bnx2fc_percpu, cpu);
2172
2173 thread = kthread_create(bnx2fc_percpu_io_thread,
2174 (void *)p,
2175 "bnx2fc_thread/%d", cpu);
2176 /* bind thread to the cpu */
2177 if (likely(!IS_ERR(thread))) {
2178 kthread_bind(thread, cpu);
2179 p->iothread = thread;
2180 wake_up_process(thread);
2181 }
2182 }
2183
2184 static void bnx2fc_percpu_thread_destroy(unsigned int cpu)
2185 {
2186 struct bnx2fc_percpu_s *p;
2187 struct task_struct *thread;
2188 struct bnx2fc_work *work, *tmp;
2189
2190 BNX2FC_MISC_DBG("destroying io thread for CPU %d\n", cpu);
2191
2192 /* Prevent any new work from being queued for this CPU */
2193 p = &per_cpu(bnx2fc_percpu, cpu);
2194 spin_lock_bh(&p->fp_work_lock);
2195 thread = p->iothread;
2196 p->iothread = NULL;
2197
2198
2199 /* Free all work in the list */
2200 list_for_each_entry_safe(work, tmp, &p->work_list, list) {
2201 list_del_init(&work->list);
2202 bnx2fc_process_cq_compl(work->tgt, work->wqe);
2203 kfree(work);
2204 }
2205
2206 spin_unlock_bh(&p->fp_work_lock);
2207
2208 if (thread)
2209 kthread_stop(thread);
2210 }
2211
2212 /**
2213 * bnx2fc_cpu_callback - Handler for CPU hotplug events
2214 *
2215 * @nfb: The callback data block
2216 * @action: The event triggering the callback
2217 * @hcpu: The index of the CPU that the event is for
2218 *
2219 * This creates or destroys per-CPU data for fcoe
2220 *
2221 * Returns NOTIFY_OK always.
2222 */
2223 static int bnx2fc_cpu_callback(struct notifier_block *nfb,
2224 unsigned long action, void *hcpu)
2225 {
2226 unsigned cpu = (unsigned long)hcpu;
2227
2228 switch (action) {
2229 case CPU_ONLINE:
2230 case CPU_ONLINE_FROZEN:
2231 printk(PFX "CPU %x online: Create Rx thread\n", cpu);
2232 bnx2fc_percpu_thread_create(cpu);
2233 break;
2234 case CPU_DEAD:
2235 case CPU_DEAD_FROZEN:
2236 printk(PFX "CPU %x offline: Remove Rx thread\n", cpu);
2237 bnx2fc_percpu_thread_destroy(cpu);
2238 break;
2239 default:
2240 break;
2241 }
2242 return NOTIFY_OK;
2243 }
2244
2245 /**
2246 * bnx2fc_mod_init - module init entry point
2247 *
2248 * Initialize driver wide global data structures, and register
2249 * with cnic module
2250 **/
2251 static int __init bnx2fc_mod_init(void)
2252 {
2253 struct fcoe_percpu_s *bg;
2254 struct task_struct *l2_thread;
2255 int rc = 0;
2256 unsigned int cpu = 0;
2257 struct bnx2fc_percpu_s *p;
2258
2259 printk(KERN_INFO PFX "%s", version);
2260
2261 /* register as a fcoe transport */
2262 rc = fcoe_transport_attach(&bnx2fc_transport);
2263 if (rc) {
2264 printk(KERN_ERR "failed to register an fcoe transport, check "
2265 "if libfcoe is loaded\n");
2266 goto out;
2267 }
2268
2269 INIT_LIST_HEAD(&adapter_list);
2270 INIT_LIST_HEAD(&if_list);
2271 mutex_init(&bnx2fc_dev_lock);
2272 adapter_count = 0;
2273
2274 /* Attach FC transport template */
2275 rc = bnx2fc_attach_transport();
2276 if (rc)
2277 goto detach_ft;
2278
2279 bnx2fc_wq = alloc_workqueue("bnx2fc", 0, 0);
2280 if (!bnx2fc_wq) {
2281 rc = -ENOMEM;
2282 goto release_bt;
2283 }
2284
2285 bg = &bnx2fc_global;
2286 skb_queue_head_init(&bg->fcoe_rx_list);
2287 l2_thread = kthread_create(bnx2fc_l2_rcv_thread,
2288 (void *)bg,
2289 "bnx2fc_l2_thread");
2290 if (IS_ERR(l2_thread)) {
2291 rc = PTR_ERR(l2_thread);
2292 goto free_wq;
2293 }
2294 wake_up_process(l2_thread);
2295 spin_lock_bh(&bg->fcoe_rx_list.lock);
2296 bg->thread = l2_thread;
2297 spin_unlock_bh(&bg->fcoe_rx_list.lock);
2298
2299 for_each_possible_cpu(cpu) {
2300 p = &per_cpu(bnx2fc_percpu, cpu);
2301 INIT_LIST_HEAD(&p->work_list);
2302 spin_lock_init(&p->fp_work_lock);
2303 }
2304
2305 for_each_online_cpu(cpu) {
2306 bnx2fc_percpu_thread_create(cpu);
2307 }
2308
2309 /* Initialize per CPU interrupt thread */
2310 register_hotcpu_notifier(&bnx2fc_cpu_notifier);
2311
2312 cnic_register_driver(CNIC_ULP_FCOE, &bnx2fc_cnic_cb);
2313
2314 return 0;
2315
2316 free_wq:
2317 destroy_workqueue(bnx2fc_wq);
2318 release_bt:
2319 bnx2fc_release_transport();
2320 detach_ft:
2321 fcoe_transport_detach(&bnx2fc_transport);
2322 out:
2323 return rc;
2324 }
2325
2326 static void __exit bnx2fc_mod_exit(void)
2327 {
2328 LIST_HEAD(to_be_deleted);
2329 struct bnx2fc_hba *hba, *next;
2330 struct fcoe_percpu_s *bg;
2331 struct task_struct *l2_thread;
2332 struct sk_buff *skb;
2333 unsigned int cpu = 0;
2334
2335 /*
2336 * NOTE: Since cnic calls register_driver routine rtnl_lock,
2337 * it will have higher precedence than bnx2fc_dev_lock.
2338 * unregister_device() cannot be called with bnx2fc_dev_lock
2339 * held.
2340 */
2341 mutex_lock(&bnx2fc_dev_lock);
2342 list_splice(&adapter_list, &to_be_deleted);
2343 INIT_LIST_HEAD(&adapter_list);
2344 adapter_count = 0;
2345 mutex_unlock(&bnx2fc_dev_lock);
2346
2347 /* Unregister with cnic */
2348 list_for_each_entry_safe(hba, next, &to_be_deleted, list) {
2349 list_del_init(&hba->list);
2350 printk(KERN_ERR PFX "MOD_EXIT:destroy hba = 0x%p\n",
2351 hba);
2352 bnx2fc_ulp_stop(hba);
2353 /* unregister cnic device */
2354 if (test_and_clear_bit(BNX2FC_CNIC_REGISTERED,
2355 &hba->reg_with_cnic))
2356 hba->cnic->unregister_device(hba->cnic,
2357 CNIC_ULP_FCOE);
2358 bnx2fc_hba_destroy(hba);
2359 }
2360 cnic_unregister_driver(CNIC_ULP_FCOE);
2361
2362 /* Destroy global thread */
2363 bg = &bnx2fc_global;
2364 spin_lock_bh(&bg->fcoe_rx_list.lock);
2365 l2_thread = bg->thread;
2366 bg->thread = NULL;
2367 while ((skb = __skb_dequeue(&bg->fcoe_rx_list)) != NULL)
2368 kfree_skb(skb);
2369
2370 spin_unlock_bh(&bg->fcoe_rx_list.lock);
2371
2372 if (l2_thread)
2373 kthread_stop(l2_thread);
2374
2375 unregister_hotcpu_notifier(&bnx2fc_cpu_notifier);
2376
2377 /* Destroy per cpu threads */
2378 for_each_online_cpu(cpu) {
2379 bnx2fc_percpu_thread_destroy(cpu);
2380 }
2381
2382 destroy_workqueue(bnx2fc_wq);
2383 /*
2384 * detach from scsi transport
2385 * must happen after all destroys are done
2386 */
2387 bnx2fc_release_transport();
2388
2389 /* detach from fcoe transport */
2390 fcoe_transport_detach(&bnx2fc_transport);
2391 }
2392
2393 module_init(bnx2fc_mod_init);
2394 module_exit(bnx2fc_mod_exit);
2395
2396 static struct fc_function_template bnx2fc_transport_function = {
2397 .show_host_node_name = 1,
2398 .show_host_port_name = 1,
2399 .show_host_supported_classes = 1,
2400 .show_host_supported_fc4s = 1,
2401 .show_host_active_fc4s = 1,
2402 .show_host_maxframe_size = 1,
2403
2404 .show_host_port_id = 1,
2405 .show_host_supported_speeds = 1,
2406 .get_host_speed = fc_get_host_speed,
2407 .show_host_speed = 1,
2408 .show_host_port_type = 1,
2409 .get_host_port_state = fc_get_host_port_state,
2410 .show_host_port_state = 1,
2411 .show_host_symbolic_name = 1,
2412
2413 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2414 sizeof(struct bnx2fc_rport)),
2415 .show_rport_maxframe_size = 1,
2416 .show_rport_supported_classes = 1,
2417
2418 .show_host_fabric_name = 1,
2419 .show_starget_node_name = 1,
2420 .show_starget_port_name = 1,
2421 .show_starget_port_id = 1,
2422 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2423 .show_rport_dev_loss_tmo = 1,
2424 .get_fc_host_stats = bnx2fc_get_host_stats,
2425
2426 .issue_fc_host_lip = bnx2fc_fcoe_reset,
2427
2428 .terminate_rport_io = fc_rport_terminate_io,
2429
2430 .vport_create = bnx2fc_vport_create,
2431 .vport_delete = bnx2fc_vport_destroy,
2432 .vport_disable = bnx2fc_vport_disable,
2433 .bsg_request = fc_lport_bsg_request,
2434 };
2435
2436 static struct fc_function_template bnx2fc_vport_xport_function = {
2437 .show_host_node_name = 1,
2438 .show_host_port_name = 1,
2439 .show_host_supported_classes = 1,
2440 .show_host_supported_fc4s = 1,
2441 .show_host_active_fc4s = 1,
2442 .show_host_maxframe_size = 1,
2443
2444 .show_host_port_id = 1,
2445 .show_host_supported_speeds = 1,
2446 .get_host_speed = fc_get_host_speed,
2447 .show_host_speed = 1,
2448 .show_host_port_type = 1,
2449 .get_host_port_state = fc_get_host_port_state,
2450 .show_host_port_state = 1,
2451 .show_host_symbolic_name = 1,
2452
2453 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2454 sizeof(struct bnx2fc_rport)),
2455 .show_rport_maxframe_size = 1,
2456 .show_rport_supported_classes = 1,
2457
2458 .show_host_fabric_name = 1,
2459 .show_starget_node_name = 1,
2460 .show_starget_port_name = 1,
2461 .show_starget_port_id = 1,
2462 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2463 .show_rport_dev_loss_tmo = 1,
2464 .get_fc_host_stats = fc_get_host_stats,
2465 .issue_fc_host_lip = bnx2fc_fcoe_reset,
2466 .terminate_rport_io = fc_rport_terminate_io,
2467 .bsg_request = fc_lport_bsg_request,
2468 };
2469
2470 /**
2471 * scsi_host_template structure used while registering with SCSI-ml
2472 */
2473 static struct scsi_host_template bnx2fc_shost_template = {
2474 .module = THIS_MODULE,
2475 .name = "Broadcom Offload FCoE Initiator",
2476 .queuecommand = bnx2fc_queuecommand,
2477 .eh_abort_handler = bnx2fc_eh_abort, /* abts */
2478 .eh_device_reset_handler = bnx2fc_eh_device_reset, /* lun reset */
2479 .eh_target_reset_handler = bnx2fc_eh_target_reset, /* tgt reset */
2480 .eh_host_reset_handler = fc_eh_host_reset,
2481 .slave_alloc = fc_slave_alloc,
2482 .change_queue_depth = fc_change_queue_depth,
2483 .change_queue_type = fc_change_queue_type,
2484 .this_id = -1,
2485 .cmd_per_lun = 3,
2486 .can_queue = BNX2FC_CAN_QUEUE,
2487 .use_clustering = ENABLE_CLUSTERING,
2488 .sg_tablesize = BNX2FC_MAX_BDS_PER_CMD,
2489 .max_sectors = 512,
2490 };
2491
2492 static struct libfc_function_template bnx2fc_libfc_fcn_templ = {
2493 .frame_send = bnx2fc_xmit,
2494 .elsct_send = bnx2fc_elsct_send,
2495 .fcp_abort_io = bnx2fc_abort_io,
2496 .fcp_cleanup = bnx2fc_cleanup,
2497 .rport_event_callback = bnx2fc_rport_event_handler,
2498 };
2499
2500 /**
2501 * bnx2fc_cnic_cb - global template of bnx2fc - cnic driver interface
2502 * structure carrying callback function pointers
2503 */
2504 static struct cnic_ulp_ops bnx2fc_cnic_cb = {
2505 .owner = THIS_MODULE,
2506 .cnic_init = bnx2fc_ulp_init,
2507 .cnic_exit = bnx2fc_ulp_exit,
2508 .cnic_start = bnx2fc_ulp_start,
2509 .cnic_stop = bnx2fc_ulp_stop,
2510 .indicate_kcqes = bnx2fc_indicate_kcqe,
2511 .indicate_netevent = bnx2fc_indicate_netevent,
2512 };
linux-next