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offb: Fix bug in calculating requested vram size
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / bnx2fc / bnx2fc_fcoe.c
blobbdf62a5fc192a5aaa3673b1d620a9749e4cb1427
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 - 2010 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 u32 adapter_count;
19 static DEFINE_MUTEX(bnx2fc_dev_lock);
20 DEFINE_PER_CPU(struct bnx2fc_percpu_s, bnx2fc_percpu);
21
22 #define DRV_MODULE_NAME "bnx2fc"
23 #define DRV_MODULE_VERSION BNX2FC_VERSION
24 #define DRV_MODULE_RELDATE "Mar 17, 2011"
25
26
27 static char version[] __devinitdata =
28 "Broadcom NetXtreme II FCoE Driver " DRV_MODULE_NAME \
29 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
30
31
32 MODULE_AUTHOR("Bhanu Prakash Gollapudi <bprakash@broadcom.com>");
33 MODULE_DESCRIPTION("Broadcom NetXtreme II BCM57710 FCoE Driver");
34 MODULE_LICENSE("GPL");
35 MODULE_VERSION(DRV_MODULE_VERSION);
36
37 #define BNX2FC_MAX_QUEUE_DEPTH 256
38 #define BNX2FC_MIN_QUEUE_DEPTH 32
39 #define FCOE_WORD_TO_BYTE 4
40
41 static struct scsi_transport_template *bnx2fc_transport_template;
42 static struct scsi_transport_template *bnx2fc_vport_xport_template;
43
44 struct workqueue_struct *bnx2fc_wq;
45
46 /* bnx2fc structure needs only one instance of the fcoe_percpu_s structure.
47 * Here the io threads are per cpu but the l2 thread is just one
48 */
49 struct fcoe_percpu_s bnx2fc_global;
50 DEFINE_SPINLOCK(bnx2fc_global_lock);
51
52 static struct cnic_ulp_ops bnx2fc_cnic_cb;
53 static struct libfc_function_template bnx2fc_libfc_fcn_templ;
54 static struct scsi_host_template bnx2fc_shost_template;
55 static struct fc_function_template bnx2fc_transport_function;
56 static struct fc_function_template bnx2fc_vport_xport_function;
57 static int bnx2fc_create(struct net_device *netdev, enum fip_state fip_mode);
58 static int bnx2fc_destroy(struct net_device *net_device);
59 static int bnx2fc_enable(struct net_device *netdev);
60 static int bnx2fc_disable(struct net_device *netdev);
61
62 static void bnx2fc_recv_frame(struct sk_buff *skb);
63
64 static void bnx2fc_start_disc(struct bnx2fc_hba *hba);
65 static int bnx2fc_shost_config(struct fc_lport *lport, struct device *dev);
66 static int bnx2fc_net_config(struct fc_lport *lp);
67 static int bnx2fc_lport_config(struct fc_lport *lport);
68 static int bnx2fc_em_config(struct fc_lport *lport);
69 static int bnx2fc_bind_adapter_devices(struct bnx2fc_hba *hba);
70 static void bnx2fc_unbind_adapter_devices(struct bnx2fc_hba *hba);
71 static int bnx2fc_bind_pcidev(struct bnx2fc_hba *hba);
72 static void bnx2fc_unbind_pcidev(struct bnx2fc_hba *hba);
73 static struct fc_lport *bnx2fc_if_create(struct bnx2fc_hba *hba,
74 struct device *parent, int npiv);
75 static void bnx2fc_destroy_work(struct work_struct *work);
76
77 static struct bnx2fc_hba *bnx2fc_hba_lookup(struct net_device *phys_dev);
78 static struct bnx2fc_hba *bnx2fc_find_hba_for_cnic(struct cnic_dev *cnic);
79
80 static int bnx2fc_fw_init(struct bnx2fc_hba *hba);
81 static void bnx2fc_fw_destroy(struct bnx2fc_hba *hba);
82
83 static void bnx2fc_port_shutdown(struct fc_lport *lport);
84 static void bnx2fc_stop(struct bnx2fc_hba *hba);
85 static int __init bnx2fc_mod_init(void);
86 static void __exit bnx2fc_mod_exit(void);
87
88 unsigned int bnx2fc_debug_level;
89 module_param_named(debug_logging, bnx2fc_debug_level, int, S_IRUGO|S_IWUSR);
90
91 static int bnx2fc_cpu_callback(struct notifier_block *nfb,
92 unsigned long action, void *hcpu);
93 /* notification function for CPU hotplug events */
94 static struct notifier_block bnx2fc_cpu_notifier = {
95 .notifier_call = bnx2fc_cpu_callback,
96 };
97
98 static void bnx2fc_clean_rx_queue(struct fc_lport *lp)
99 {
100 struct fcoe_percpu_s *bg;
101 struct fcoe_rcv_info *fr;
102 struct sk_buff_head *list;
103 struct sk_buff *skb, *next;
104 struct sk_buff *head;
105
106 bg = &bnx2fc_global;
107 spin_lock_bh(&bg->fcoe_rx_list.lock);
108 list = &bg->fcoe_rx_list;
109 head = list->next;
110 for (skb = head; skb != (struct sk_buff *)list;
111 skb = next) {
112 next = skb->next;
113 fr = fcoe_dev_from_skb(skb);
114 if (fr->fr_dev == lp) {
115 __skb_unlink(skb, list);
116 kfree_skb(skb);
117 }
118 }
119 spin_unlock_bh(&bg->fcoe_rx_list.lock);
120 }
121
122 int bnx2fc_get_paged_crc_eof(struct sk_buff *skb, int tlen)
123 {
124 int rc;
125 spin_lock(&bnx2fc_global_lock);
126 rc = fcoe_get_paged_crc_eof(skb, tlen, &bnx2fc_global);
127 spin_unlock(&bnx2fc_global_lock);
128
129 return rc;
130 }
131
132 static void bnx2fc_abort_io(struct fc_lport *lport)
133 {
134 /*
135 * This function is no-op for bnx2fc, but we do
136 * not want to leave it as NULL either, as libfc
137 * can call the default function which is
138 * fc_fcp_abort_io.
139 */
140 }
141
142 static void bnx2fc_cleanup(struct fc_lport *lport)
143 {
144 struct fcoe_port *port = lport_priv(lport);
145 struct bnx2fc_hba *hba = port->priv;
146 struct bnx2fc_rport *tgt;
147 int i;
148
149 BNX2FC_MISC_DBG("Entered %s\n", __func__);
150 mutex_lock(&hba->hba_mutex);
151 spin_lock_bh(&hba->hba_lock);
152 for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
153 tgt = hba->tgt_ofld_list[i];
154 if (tgt) {
155 /* Cleanup IOs belonging to requested vport */
156 if (tgt->port == port) {
157 spin_unlock_bh(&hba->hba_lock);
158 BNX2FC_TGT_DBG(tgt, "flush/cleanup\n");
159 bnx2fc_flush_active_ios(tgt);
160 spin_lock_bh(&hba->hba_lock);
161 }
162 }
163 }
164 spin_unlock_bh(&hba->hba_lock);
165 mutex_unlock(&hba->hba_mutex);
166 }
167
168 static int bnx2fc_xmit_l2_frame(struct bnx2fc_rport *tgt,
169 struct fc_frame *fp)
170 {
171 struct fc_rport_priv *rdata = tgt->rdata;
172 struct fc_frame_header *fh;
173 int rc = 0;
174
175 fh = fc_frame_header_get(fp);
176 BNX2FC_TGT_DBG(tgt, "Xmit L2 frame rport = 0x%x, oxid = 0x%x, "
177 "r_ctl = 0x%x\n", rdata->ids.port_id,
178 ntohs(fh->fh_ox_id), fh->fh_r_ctl);
179 if ((fh->fh_type == FC_TYPE_ELS) &&
180 (fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
181
182 switch (fc_frame_payload_op(fp)) {
183 case ELS_ADISC:
184 rc = bnx2fc_send_adisc(tgt, fp);
185 break;
186 case ELS_LOGO:
187 rc = bnx2fc_send_logo(tgt, fp);
188 break;
189 case ELS_RLS:
190 rc = bnx2fc_send_rls(tgt, fp);
191 break;
192 default:
193 break;
194 }
195 } else if ((fh->fh_type == FC_TYPE_BLS) &&
196 (fh->fh_r_ctl == FC_RCTL_BA_ABTS))
197 BNX2FC_TGT_DBG(tgt, "ABTS frame\n");
198 else {
199 BNX2FC_TGT_DBG(tgt, "Send L2 frame type 0x%x "
200 "rctl 0x%x thru non-offload path\n",
201 fh->fh_type, fh->fh_r_ctl);
202 return -ENODEV;
203 }
204 if (rc)
205 return -ENOMEM;
206 else
207 return 0;
208 }
209
210 /**
211 * bnx2fc_xmit - bnx2fc's FCoE frame transmit function
212 *
213 * @lport: the associated local port
214 * @fp: the fc_frame to be transmitted
215 */
216 static int bnx2fc_xmit(struct fc_lport *lport, struct fc_frame *fp)
217 {
218 struct ethhdr *eh;
219 struct fcoe_crc_eof *cp;
220 struct sk_buff *skb;
221 struct fc_frame_header *fh;
222 struct bnx2fc_hba *hba;
223 struct fcoe_port *port;
224 struct fcoe_hdr *hp;
225 struct bnx2fc_rport *tgt;
226 struct fcoe_dev_stats *stats;
227 u8 sof, eof;
228 u32 crc;
229 unsigned int hlen, tlen, elen;
230 int wlen, rc = 0;
231
232 port = (struct fcoe_port *)lport_priv(lport);
233 hba = port->priv;
234
235 fh = fc_frame_header_get(fp);
236
237 skb = fp_skb(fp);
238 if (!lport->link_up) {
239 BNX2FC_HBA_DBG(lport, "bnx2fc_xmit link down\n");
240 kfree_skb(skb);
241 return 0;
242 }
243
244 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
245 if (!hba->ctlr.sel_fcf) {
246 BNX2FC_HBA_DBG(lport, "FCF not selected yet!\n");
247 kfree_skb(skb);
248 return -EINVAL;
249 }
250 if (fcoe_ctlr_els_send(&hba->ctlr, lport, skb))
251 return 0;
252 }
253
254 sof = fr_sof(fp);
255 eof = fr_eof(fp);
256
257 /*
258 * Snoop the frame header to check if the frame is for
259 * an offloaded session
260 */
261 /*
262 * tgt_ofld_list access is synchronized using
263 * both hba mutex and hba lock. Atleast hba mutex or
264 * hba lock needs to be held for read access.
265 */
266
267 spin_lock_bh(&hba->hba_lock);
268 tgt = bnx2fc_tgt_lookup(port, ntoh24(fh->fh_d_id));
269 if (tgt && (test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
270 /* This frame is for offloaded session */
271 BNX2FC_HBA_DBG(lport, "xmit: Frame is for offloaded session "
272 "port_id = 0x%x\n", ntoh24(fh->fh_d_id));
273 spin_unlock_bh(&hba->hba_lock);
274 rc = bnx2fc_xmit_l2_frame(tgt, fp);
275 if (rc != -ENODEV) {
276 kfree_skb(skb);
277 return rc;
278 }
279 } else {
280 spin_unlock_bh(&hba->hba_lock);
281 }
282
283 elen = sizeof(struct ethhdr);
284 hlen = sizeof(struct fcoe_hdr);
285 tlen = sizeof(struct fcoe_crc_eof);
286 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
287
288 skb->ip_summed = CHECKSUM_NONE;
289 crc = fcoe_fc_crc(fp);
290
291 /* copy port crc and eof to the skb buff */
292 if (skb_is_nonlinear(skb)) {
293 skb_frag_t *frag;
294 if (bnx2fc_get_paged_crc_eof(skb, tlen)) {
295 kfree_skb(skb);
296 return -ENOMEM;
297 }
298 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
299 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
300 + frag->page_offset;
301 } else {
302 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
303 }
304
305 memset(cp, 0, sizeof(*cp));
306 cp->fcoe_eof = eof;
307 cp->fcoe_crc32 = cpu_to_le32(~crc);
308 if (skb_is_nonlinear(skb)) {
309 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
310 cp = NULL;
311 }
312
313 /* adjust skb network/transport offsets to match mac/fcoe/port */
314 skb_push(skb, elen + hlen);
315 skb_reset_mac_header(skb);
316 skb_reset_network_header(skb);
317 skb->mac_len = elen;
318 skb->protocol = htons(ETH_P_FCOE);
319 skb->dev = hba->netdev;
320
321 /* fill up mac and fcoe headers */
322 eh = eth_hdr(skb);
323 eh->h_proto = htons(ETH_P_FCOE);
324 if (hba->ctlr.map_dest)
325 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
326 else
327 /* insert GW address */
328 memcpy(eh->h_dest, hba->ctlr.dest_addr, ETH_ALEN);
329
330 if (unlikely(hba->ctlr.flogi_oxid != FC_XID_UNKNOWN))
331 memcpy(eh->h_source, hba->ctlr.ctl_src_addr, ETH_ALEN);
332 else
333 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
334
335 hp = (struct fcoe_hdr *)(eh + 1);
336 memset(hp, 0, sizeof(*hp));
337 if (FC_FCOE_VER)
338 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
339 hp->fcoe_sof = sof;
340
341 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
342 if (lport->seq_offload && fr_max_payload(fp)) {
343 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
344 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
345 } else {
346 skb_shinfo(skb)->gso_type = 0;
347 skb_shinfo(skb)->gso_size = 0;
348 }
349
350 /*update tx stats */
351 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
352 stats->TxFrames++;
353 stats->TxWords += wlen;
354 put_cpu();
355
356 /* send down to lld */
357 fr_dev(fp) = lport;
358 if (port->fcoe_pending_queue.qlen)
359 fcoe_check_wait_queue(lport, skb);
360 else if (fcoe_start_io(skb))
361 fcoe_check_wait_queue(lport, skb);
362
363 return 0;
364 }
365
366 /**
367 * bnx2fc_rcv - This is bnx2fc's receive function called by NET_RX_SOFTIRQ
368 *
369 * @skb: the receive socket buffer
370 * @dev: associated net device
371 * @ptype: context
372 * @olddev: last device
373 *
374 * This function receives the packet and builds FC frame and passes it up
375 */
376 static int bnx2fc_rcv(struct sk_buff *skb, struct net_device *dev,
377 struct packet_type *ptype, struct net_device *olddev)
378 {
379 struct fc_lport *lport;
380 struct bnx2fc_hba *hba;
381 struct fc_frame_header *fh;
382 struct fcoe_rcv_info *fr;
383 struct fcoe_percpu_s *bg;
384 unsigned short oxid;
385
386 hba = container_of(ptype, struct bnx2fc_hba, fcoe_packet_type);
387 lport = hba->ctlr.lp;
388
389 if (unlikely(lport == NULL)) {
390 printk(KERN_ALERT PFX "bnx2fc_rcv: lport is NULL\n");
391 goto err;
392 }
393
394 if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
395 printk(KERN_ALERT PFX "bnx2fc_rcv: Wrong FC type frame\n");
396 goto err;
397 }
398
399 /*
400 * Check for minimum frame length, and make sure required FCoE
401 * and FC headers are pulled into the linear data area.
402 */
403 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
404 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
405 goto err;
406
407 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
408 fh = (struct fc_frame_header *) skb_transport_header(skb);
409
410 oxid = ntohs(fh->fh_ox_id);
411
412 fr = fcoe_dev_from_skb(skb);
413 fr->fr_dev = lport;
414 fr->ptype = ptype;
415
416 bg = &bnx2fc_global;
417 spin_lock_bh(&bg->fcoe_rx_list.lock);
418
419 __skb_queue_tail(&bg->fcoe_rx_list, skb);
420 if (bg->fcoe_rx_list.qlen == 1)
421 wake_up_process(bg->thread);
422
423 spin_unlock_bh(&bg->fcoe_rx_list.lock);
424
425 return 0;
426 err:
427 kfree_skb(skb);
428 return -1;
429 }
430
431 static int bnx2fc_l2_rcv_thread(void *arg)
432 {
433 struct fcoe_percpu_s *bg = arg;
434 struct sk_buff *skb;
435
436 set_user_nice(current, -20);
437 set_current_state(TASK_INTERRUPTIBLE);
438 while (!kthread_should_stop()) {
439 schedule();
440 spin_lock_bh(&bg->fcoe_rx_list.lock);
441 while ((skb = __skb_dequeue(&bg->fcoe_rx_list)) != NULL) {
442 spin_unlock_bh(&bg->fcoe_rx_list.lock);
443 bnx2fc_recv_frame(skb);
444 spin_lock_bh(&bg->fcoe_rx_list.lock);
445 }
446 __set_current_state(TASK_INTERRUPTIBLE);
447 spin_unlock_bh(&bg->fcoe_rx_list.lock);
448 }
449 __set_current_state(TASK_RUNNING);
450 return 0;
451 }
452
453
454 static void bnx2fc_recv_frame(struct sk_buff *skb)
455 {
456 u32 fr_len;
457 struct fc_lport *lport;
458 struct fcoe_rcv_info *fr;
459 struct fcoe_dev_stats *stats;
460 struct fc_frame_header *fh;
461 struct fcoe_crc_eof crc_eof;
462 struct fc_frame *fp;
463 struct fc_lport *vn_port;
464 struct fcoe_port *port;
465 u8 *mac = NULL;
466 u8 *dest_mac = NULL;
467 struct fcoe_hdr *hp;
468
469 fr = fcoe_dev_from_skb(skb);
470 lport = fr->fr_dev;
471 if (unlikely(lport == NULL)) {
472 printk(KERN_ALERT PFX "Invalid lport struct\n");
473 kfree_skb(skb);
474 return;
475 }
476
477 if (skb_is_nonlinear(skb))
478 skb_linearize(skb);
479 mac = eth_hdr(skb)->h_source;
480 dest_mac = eth_hdr(skb)->h_dest;
481
482 /* Pull the header */
483 hp = (struct fcoe_hdr *) skb_network_header(skb);
484 fh = (struct fc_frame_header *) skb_transport_header(skb);
485 skb_pull(skb, sizeof(struct fcoe_hdr));
486 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
487
488 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
489 stats->RxFrames++;
490 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
491
492 fp = (struct fc_frame *)skb;
493 fc_frame_init(fp);
494 fr_dev(fp) = lport;
495 fr_sof(fp) = hp->fcoe_sof;
496 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
497 put_cpu();
498 kfree_skb(skb);
499 return;
500 }
501 fr_eof(fp) = crc_eof.fcoe_eof;
502 fr_crc(fp) = crc_eof.fcoe_crc32;
503 if (pskb_trim(skb, fr_len)) {
504 put_cpu();
505 kfree_skb(skb);
506 return;
507 }
508
509 fh = fc_frame_header_get(fp);
510
511 vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
512 if (vn_port) {
513 port = lport_priv(vn_port);
514 if (compare_ether_addr(port->data_src_addr, dest_mac)
515 != 0) {
516 BNX2FC_HBA_DBG(lport, "fpma mismatch\n");
517 put_cpu();
518 kfree_skb(skb);
519 return;
520 }
521 }
522 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
523 fh->fh_type == FC_TYPE_FCP) {
524 /* Drop FCP data. We dont this in L2 path */
525 put_cpu();
526 kfree_skb(skb);
527 return;
528 }
529 if (fh->fh_r_ctl == FC_RCTL_ELS_REQ &&
530 fh->fh_type == FC_TYPE_ELS) {
531 switch (fc_frame_payload_op(fp)) {
532 case ELS_LOGO:
533 if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
534 /* drop non-FIP LOGO */
535 put_cpu();
536 kfree_skb(skb);
537 return;
538 }
539 break;
540 }
541 }
542 if (le32_to_cpu(fr_crc(fp)) !=
543 ~crc32(~0, skb->data, fr_len)) {
544 if (stats->InvalidCRCCount < 5)
545 printk(KERN_WARNING PFX "dropping frame with "
546 "CRC error\n");
547 stats->InvalidCRCCount++;
548 put_cpu();
549 kfree_skb(skb);
550 return;
551 }
552 put_cpu();
553 fc_exch_recv(lport, fp);
554 }
555
556 /**
557 * bnx2fc_percpu_io_thread - thread per cpu for ios
558 *
559 * @arg: ptr to bnx2fc_percpu_info structure
560 */
561 int bnx2fc_percpu_io_thread(void *arg)
562 {
563 struct bnx2fc_percpu_s *p = arg;
564 struct bnx2fc_work *work, *tmp;
565 LIST_HEAD(work_list);
566
567 set_user_nice(current, -20);
568 set_current_state(TASK_INTERRUPTIBLE);
569 while (!kthread_should_stop()) {
570 schedule();
571 spin_lock_bh(&p->fp_work_lock);
572 while (!list_empty(&p->work_list)) {
573 list_splice_init(&p->work_list, &work_list);
574 spin_unlock_bh(&p->fp_work_lock);
575
576 list_for_each_entry_safe(work, tmp, &work_list, list) {
577 list_del_init(&work->list);
578 bnx2fc_process_cq_compl(work->tgt, work->wqe);
579 kfree(work);
580 }
581
582 spin_lock_bh(&p->fp_work_lock);
583 }
584 __set_current_state(TASK_INTERRUPTIBLE);
585 spin_unlock_bh(&p->fp_work_lock);
586 }
587 __set_current_state(TASK_RUNNING);
588
589 return 0;
590 }
591
592 static struct fc_host_statistics *bnx2fc_get_host_stats(struct Scsi_Host *shost)
593 {
594 struct fc_host_statistics *bnx2fc_stats;
595 struct fc_lport *lport = shost_priv(shost);
596 struct fcoe_port *port = lport_priv(lport);
597 struct bnx2fc_hba *hba = port->priv;
598 struct fcoe_statistics_params *fw_stats;
599 int rc = 0;
600
601 fw_stats = (struct fcoe_statistics_params *)hba->stats_buffer;
602 if (!fw_stats)
603 return NULL;
604
605 bnx2fc_stats = fc_get_host_stats(shost);
606
607 init_completion(&hba->stat_req_done);
608 if (bnx2fc_send_stat_req(hba))
609 return bnx2fc_stats;
610 rc = wait_for_completion_timeout(&hba->stat_req_done, (2 * HZ));
611 if (!rc) {
612 BNX2FC_HBA_DBG(lport, "FW stat req timed out\n");
613 return bnx2fc_stats;
614 }
615 bnx2fc_stats->invalid_crc_count += fw_stats->rx_stat1.fc_crc_cnt;
616 bnx2fc_stats->tx_frames += fw_stats->tx_stat.fcoe_tx_pkt_cnt;
617 bnx2fc_stats->tx_words += (fw_stats->tx_stat.fcoe_tx_byte_cnt) / 4;
618 bnx2fc_stats->rx_frames += fw_stats->rx_stat0.fcoe_rx_pkt_cnt;
619 bnx2fc_stats->rx_words += (fw_stats->rx_stat0.fcoe_rx_byte_cnt) / 4;
620
621 bnx2fc_stats->dumped_frames = 0;
622 bnx2fc_stats->lip_count = 0;
623 bnx2fc_stats->nos_count = 0;
624 bnx2fc_stats->loss_of_sync_count = 0;
625 bnx2fc_stats->loss_of_signal_count = 0;
626 bnx2fc_stats->prim_seq_protocol_err_count = 0;
627
628 return bnx2fc_stats;
629 }
630
631 static int bnx2fc_shost_config(struct fc_lport *lport, struct device *dev)
632 {
633 struct fcoe_port *port = lport_priv(lport);
634 struct bnx2fc_hba *hba = port->priv;
635 struct Scsi_Host *shost = lport->host;
636 int rc = 0;
637
638 shost->max_cmd_len = BNX2FC_MAX_CMD_LEN;
639 shost->max_lun = BNX2FC_MAX_LUN;
640 shost->max_id = BNX2FC_MAX_FCP_TGT;
641 shost->max_channel = 0;
642 if (lport->vport)
643 shost->transportt = bnx2fc_vport_xport_template;
644 else
645 shost->transportt = bnx2fc_transport_template;
646
647 /* Add the new host to SCSI-ml */
648 rc = scsi_add_host(lport->host, dev);
649 if (rc) {
650 printk(KERN_ERR PFX "Error on scsi_add_host\n");
651 return rc;
652 }
653 if (!lport->vport)
654 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
655 sprintf(fc_host_symbolic_name(lport->host), "%s v%s over %s",
656 BNX2FC_NAME, BNX2FC_VERSION,
657 hba->netdev->name);
658
659 return 0;
660 }
661
662 static void bnx2fc_link_speed_update(struct fc_lport *lport)
663 {
664 struct fcoe_port *port = lport_priv(lport);
665 struct bnx2fc_hba *hba = port->priv;
666 struct net_device *netdev = hba->netdev;
667 struct ethtool_cmd ecmd;
668
669 if (!dev_ethtool_get_settings(netdev, &ecmd)) {
670 lport->link_supported_speeds &=
671 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
672 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
673 SUPPORTED_1000baseT_Full))
674 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
675 if (ecmd.supported & SUPPORTED_10000baseT_Full)
676 lport->link_supported_speeds |= FC_PORTSPEED_10GBIT;
677
678 switch (ethtool_cmd_speed(&ecmd)) {
679 case SPEED_1000:
680 lport->link_speed = FC_PORTSPEED_1GBIT;
681 break;
682 case SPEED_10000:
683 lport->link_speed = FC_PORTSPEED_10GBIT;
684 break;
685 }
686 }
687 }
688 static int bnx2fc_link_ok(struct fc_lport *lport)
689 {
690 struct fcoe_port *port = lport_priv(lport);
691 struct bnx2fc_hba *hba = port->priv;
692 struct net_device *dev = hba->phys_dev;
693 int rc = 0;
694
695 if ((dev->flags & IFF_UP) && netif_carrier_ok(dev))
696 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
697 else {
698 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
699 rc = -1;
700 }
701 return rc;
702 }
703
704 /**
705 * bnx2fc_get_link_state - get network link state
706 *
707 * @hba: adapter instance pointer
708 *
709 * updates adapter structure flag based on netdev state
710 */
711 void bnx2fc_get_link_state(struct bnx2fc_hba *hba)
712 {
713 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
714 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
715 else
716 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
717 }
718
719 static int bnx2fc_net_config(struct fc_lport *lport)
720 {
721 struct bnx2fc_hba *hba;
722 struct fcoe_port *port;
723 u64 wwnn, wwpn;
724
725 port = lport_priv(lport);
726 hba = port->priv;
727
728 /* require support for get_pauseparam ethtool op. */
729 if (!hba->phys_dev->ethtool_ops ||
730 !hba->phys_dev->ethtool_ops->get_pauseparam)
731 return -EOPNOTSUPP;
732
733 if (fc_set_mfs(lport, BNX2FC_MFS))
734 return -EINVAL;
735
736 skb_queue_head_init(&port->fcoe_pending_queue);
737 port->fcoe_pending_queue_active = 0;
738 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long) lport);
739
740 bnx2fc_link_speed_update(lport);
741
742 if (!lport->vport) {
743 wwnn = fcoe_wwn_from_mac(hba->ctlr.ctl_src_addr, 1, 0);
744 BNX2FC_HBA_DBG(lport, "WWNN = 0x%llx\n", wwnn);
745 fc_set_wwnn(lport, wwnn);
746
747 wwpn = fcoe_wwn_from_mac(hba->ctlr.ctl_src_addr, 2, 0);
748 BNX2FC_HBA_DBG(lport, "WWPN = 0x%llx\n", wwpn);
749 fc_set_wwpn(lport, wwpn);
750 }
751
752 return 0;
753 }
754
755 static void bnx2fc_destroy_timer(unsigned long data)
756 {
757 struct bnx2fc_hba *hba = (struct bnx2fc_hba *)data;
758
759 BNX2FC_HBA_DBG(hba->ctlr.lp, "ERROR:bnx2fc_destroy_timer - "
760 "Destroy compl not received!!\n");
761 hba->flags |= BNX2FC_FLAG_DESTROY_CMPL;
762 wake_up_interruptible(&hba->destroy_wait);
763 }
764
765 /**
766 * bnx2fc_indicate_netevent - Generic netdev event handler
767 *
768 * @context: adapter structure pointer
769 * @event: event type
770 *
771 * Handles NETDEV_UP, NETDEV_DOWN, NETDEV_GOING_DOWN,NETDEV_CHANGE and
772 * NETDEV_CHANGE_MTU events
773 */
774 static void bnx2fc_indicate_netevent(void *context, unsigned long event)
775 {
776 struct bnx2fc_hba *hba = (struct bnx2fc_hba *)context;
777 struct fc_lport *lport = hba->ctlr.lp;
778 struct fc_lport *vport;
779 u32 link_possible = 1;
780
781 if (!test_bit(BNX2FC_CREATE_DONE, &hba->init_done)) {
782 BNX2FC_MISC_DBG("driver not ready. event=%s %ld\n",
783 hba->netdev->name, event);
784 return;
785 }
786
787 /*
788 * ASSUMPTION:
789 * indicate_netevent cannot be called from cnic unless bnx2fc
790 * does register_device
791 */
792 BUG_ON(!lport);
793
794 BNX2FC_HBA_DBG(lport, "enter netevent handler - event=%s %ld\n",
795 hba->netdev->name, event);
796
797 switch (event) {
798 case NETDEV_UP:
799 BNX2FC_HBA_DBG(lport, "Port up, adapter_state = %ld\n",
800 hba->adapter_state);
801 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
802 printk(KERN_ERR "indicate_netevent: "\
803 "adapter is not UP!!\n");
804 break;
805
806 case NETDEV_DOWN:
807 BNX2FC_HBA_DBG(lport, "Port down\n");
808 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
809 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
810 link_possible = 0;
811 break;
812
813 case NETDEV_GOING_DOWN:
814 BNX2FC_HBA_DBG(lport, "Port going down\n");
815 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
816 link_possible = 0;
817 break;
818
819 case NETDEV_CHANGE:
820 BNX2FC_HBA_DBG(lport, "NETDEV_CHANGE\n");
821 break;
822
823 default:
824 printk(KERN_ERR PFX "Unkonwn netevent %ld", event);
825 return;
826 }
827
828 bnx2fc_link_speed_update(lport);
829
830 if (link_possible && !bnx2fc_link_ok(lport)) {
831 printk(KERN_ERR "indicate_netevent: call ctlr_link_up\n");
832 fcoe_ctlr_link_up(&hba->ctlr);
833 } else {
834 printk(KERN_ERR "indicate_netevent: call ctlr_link_down\n");
835 if (fcoe_ctlr_link_down(&hba->ctlr)) {
836 clear_bit(ADAPTER_STATE_READY, &hba->adapter_state);
837 mutex_lock(&lport->lp_mutex);
838 list_for_each_entry(vport, &lport->vports, list)
839 fc_host_port_type(vport->host) =
840 FC_PORTTYPE_UNKNOWN;
841 mutex_unlock(&lport->lp_mutex);
842 fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;
843 per_cpu_ptr(lport->dev_stats,
844 get_cpu())->LinkFailureCount++;
845 put_cpu();
846 fcoe_clean_pending_queue(lport);
847
848 init_waitqueue_head(&hba->shutdown_wait);
849 BNX2FC_HBA_DBG(lport, "indicate_netevent "
850 "num_ofld_sess = %d\n",
851 hba->num_ofld_sess);
852 hba->wait_for_link_down = 1;
853 BNX2FC_HBA_DBG(lport, "waiting for uploads to "
854 "compl proc = %s\n",
855 current->comm);
856 wait_event_interruptible(hba->shutdown_wait,
857 (hba->num_ofld_sess == 0));
858 BNX2FC_HBA_DBG(lport, "wakeup - num_ofld_sess = %d\n",
859 hba->num_ofld_sess);
860 hba->wait_for_link_down = 0;
861
862 if (signal_pending(current))
863 flush_signals(current);
864 }
865 }
866 }
867
868 static int bnx2fc_libfc_config(struct fc_lport *lport)
869 {
870
871 /* Set the function pointers set by bnx2fc driver */
872 memcpy(&lport->tt, &bnx2fc_libfc_fcn_templ,
873 sizeof(struct libfc_function_template));
874 fc_elsct_init(lport);
875 fc_exch_init(lport);
876 fc_rport_init(lport);
877 fc_disc_init(lport);
878 return 0;
879 }
880
881 static int bnx2fc_em_config(struct fc_lport *lport)
882 {
883 struct fcoe_port *port = lport_priv(lport);
884 struct bnx2fc_hba *hba = port->priv;
885
886 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, FCOE_MIN_XID,
887 FCOE_MAX_XID, NULL)) {
888 printk(KERN_ERR PFX "em_config:fc_exch_mgr_alloc failed\n");
889 return -ENOMEM;
890 }
891
892 hba->cmd_mgr = bnx2fc_cmd_mgr_alloc(hba, BNX2FC_MIN_XID,
893 BNX2FC_MAX_XID);
894
895 if (!hba->cmd_mgr) {
896 printk(KERN_ERR PFX "em_config:bnx2fc_cmd_mgr_alloc failed\n");
897 fc_exch_mgr_free(lport);
898 return -ENOMEM;
899 }
900 return 0;
901 }
902
903 static int bnx2fc_lport_config(struct fc_lport *lport)
904 {
905 lport->link_up = 0;
906 lport->qfull = 0;
907 lport->max_retry_count = 3;
908 lport->max_rport_retry_count = 3;
909 lport->e_d_tov = 2 * 1000;
910 lport->r_a_tov = 10 * 1000;
911
912 /* REVISIT: enable when supporting tape devices
913 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
914 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
915 */
916 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS);
917 lport->does_npiv = 1;
918
919 memset(&lport->rnid_gen, 0, sizeof(struct fc_els_rnid_gen));
920 lport->rnid_gen.rnid_atype = BNX2FC_RNID_HBA;
921
922 /* alloc stats structure */
923 if (fc_lport_init_stats(lport))
924 return -ENOMEM;
925
926 /* Finish fc_lport configuration */
927 fc_lport_config(lport);
928
929 return 0;
930 }
931
932 /**
933 * bnx2fc_fip_recv - handle a received FIP frame.
934 *
935 * @skb: the received skb
936 * @dev: associated &net_device
937 * @ptype: the &packet_type structure which was used to register this handler.
938 * @orig_dev: original receive &net_device, in case @ dev is a bond.
939 *
940 * Returns: 0 for success
941 */
942 static int bnx2fc_fip_recv(struct sk_buff *skb, struct net_device *dev,
943 struct packet_type *ptype,
944 struct net_device *orig_dev)
945 {
946 struct bnx2fc_hba *hba;
947 hba = container_of(ptype, struct bnx2fc_hba, fip_packet_type);
948 fcoe_ctlr_recv(&hba->ctlr, skb);
949 return 0;
950 }
951
952 /**
953 * bnx2fc_update_src_mac - Update Ethernet MAC filters.
954 *
955 * @fip: FCoE controller.
956 * @old: Unicast MAC address to delete if the MAC is non-zero.
957 * @new: Unicast MAC address to add.
958 *
959 * Remove any previously-set unicast MAC filter.
960 * Add secondary FCoE MAC address filter for our OUI.
961 */
962 static void bnx2fc_update_src_mac(struct fc_lport *lport, u8 *addr)
963 {
964 struct fcoe_port *port = lport_priv(lport);
965
966 memcpy(port->data_src_addr, addr, ETH_ALEN);
967 }
968
969 /**
970 * bnx2fc_get_src_mac - return the ethernet source address for an lport
971 *
972 * @lport: libfc port
973 */
974 static u8 *bnx2fc_get_src_mac(struct fc_lport *lport)
975 {
976 struct fcoe_port *port;
977
978 port = (struct fcoe_port *)lport_priv(lport);
979 return port->data_src_addr;
980 }
981
982 /**
983 * bnx2fc_fip_send - send an Ethernet-encapsulated FIP frame.
984 *
985 * @fip: FCoE controller.
986 * @skb: FIP Packet.
987 */
988 static void bnx2fc_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
989 {
990 skb->dev = bnx2fc_from_ctlr(fip)->netdev;
991 dev_queue_xmit(skb);
992 }
993
994 static int bnx2fc_vport_create(struct fc_vport *vport, bool disabled)
995 {
996 struct Scsi_Host *shost = vport_to_shost(vport);
997 struct fc_lport *n_port = shost_priv(shost);
998 struct fcoe_port *port = lport_priv(n_port);
999 struct bnx2fc_hba *hba = port->priv;
1000 struct net_device *netdev = hba->netdev;
1001 struct fc_lport *vn_port;
1002
1003 if (!test_bit(BNX2FC_FW_INIT_DONE, &hba->init_done)) {
1004 printk(KERN_ERR PFX "vn ports cannot be created on"
1005 "this hba\n");
1006 return -EIO;
1007 }
1008 mutex_lock(&bnx2fc_dev_lock);
1009 vn_port = bnx2fc_if_create(hba, &vport->dev, 1);
1010 mutex_unlock(&bnx2fc_dev_lock);
1011
1012 if (IS_ERR(vn_port)) {
1013 printk(KERN_ERR PFX "bnx2fc_vport_create (%s) failed\n",
1014 netdev->name);
1015 return -EIO;
1016 }
1017
1018 if (disabled) {
1019 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1020 } else {
1021 vn_port->boot_time = jiffies;
1022 fc_lport_init(vn_port);
1023 fc_fabric_login(vn_port);
1024 fc_vport_setlink(vn_port);
1025 }
1026 return 0;
1027 }
1028
1029 static int bnx2fc_vport_destroy(struct fc_vport *vport)
1030 {
1031 struct Scsi_Host *shost = vport_to_shost(vport);
1032 struct fc_lport *n_port = shost_priv(shost);
1033 struct fc_lport *vn_port = vport->dd_data;
1034 struct fcoe_port *port = lport_priv(vn_port);
1035
1036 mutex_lock(&n_port->lp_mutex);
1037 list_del(&vn_port->list);
1038 mutex_unlock(&n_port->lp_mutex);
1039 queue_work(bnx2fc_wq, &port->destroy_work);
1040 return 0;
1041 }
1042
1043 static int bnx2fc_vport_disable(struct fc_vport *vport, bool disable)
1044 {
1045 struct fc_lport *lport = vport->dd_data;
1046
1047 if (disable) {
1048 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1049 fc_fabric_logoff(lport);
1050 } else {
1051 lport->boot_time = jiffies;
1052 fc_fabric_login(lport);
1053 fc_vport_setlink(lport);
1054 }
1055 return 0;
1056 }
1057
1058
1059 static int bnx2fc_netdev_setup(struct bnx2fc_hba *hba)
1060 {
1061 struct net_device *netdev = hba->netdev;
1062 struct net_device *physdev = hba->phys_dev;
1063 struct netdev_hw_addr *ha;
1064 int sel_san_mac = 0;
1065
1066 /* setup Source MAC Address */
1067 rcu_read_lock();
1068 for_each_dev_addr(physdev, ha) {
1069 BNX2FC_MISC_DBG("net_config: ha->type = %d, fip_mac = ",
1070 ha->type);
1071 printk(KERN_INFO "%2x:%2x:%2x:%2x:%2x:%2x\n", ha->addr[0],
1072 ha->addr[1], ha->addr[2], ha->addr[3],
1073 ha->addr[4], ha->addr[5]);
1074
1075 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
1076 (is_valid_ether_addr(ha->addr))) {
1077 memcpy(hba->ctlr.ctl_src_addr, ha->addr, ETH_ALEN);
1078 sel_san_mac = 1;
1079 BNX2FC_MISC_DBG("Found SAN MAC\n");
1080 }
1081 }
1082 rcu_read_unlock();
1083
1084 if (!sel_san_mac)
1085 return -ENODEV;
1086
1087 hba->fip_packet_type.func = bnx2fc_fip_recv;
1088 hba->fip_packet_type.type = htons(ETH_P_FIP);
1089 hba->fip_packet_type.dev = netdev;
1090 dev_add_pack(&hba->fip_packet_type);
1091
1092 hba->fcoe_packet_type.func = bnx2fc_rcv;
1093 hba->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
1094 hba->fcoe_packet_type.dev = netdev;
1095 dev_add_pack(&hba->fcoe_packet_type);
1096
1097 return 0;
1098 }
1099
1100 static int bnx2fc_attach_transport(void)
1101 {
1102 bnx2fc_transport_template =
1103 fc_attach_transport(&bnx2fc_transport_function);
1104
1105 if (bnx2fc_transport_template == NULL) {
1106 printk(KERN_ERR PFX "Failed to attach FC transport\n");
1107 return -ENODEV;
1108 }
1109
1110 bnx2fc_vport_xport_template =
1111 fc_attach_transport(&bnx2fc_vport_xport_function);
1112 if (bnx2fc_vport_xport_template == NULL) {
1113 printk(KERN_ERR PFX
1114 "Failed to attach FC transport for vport\n");
1115 fc_release_transport(bnx2fc_transport_template);
1116 bnx2fc_transport_template = NULL;
1117 return -ENODEV;
1118 }
1119 return 0;
1120 }
1121 static void bnx2fc_release_transport(void)
1122 {
1123 fc_release_transport(bnx2fc_transport_template);
1124 fc_release_transport(bnx2fc_vport_xport_template);
1125 bnx2fc_transport_template = NULL;
1126 bnx2fc_vport_xport_template = NULL;
1127 }
1128
1129 static void bnx2fc_interface_release(struct kref *kref)
1130 {
1131 struct bnx2fc_hba *hba;
1132 struct net_device *netdev;
1133 struct net_device *phys_dev;
1134
1135 hba = container_of(kref, struct bnx2fc_hba, kref);
1136 BNX2FC_MISC_DBG("Interface is being released\n");
1137
1138 netdev = hba->netdev;
1139 phys_dev = hba->phys_dev;
1140
1141 /* tear-down FIP controller */
1142 if (test_and_clear_bit(BNX2FC_CTLR_INIT_DONE, &hba->init_done))
1143 fcoe_ctlr_destroy(&hba->ctlr);
1144
1145 /* Free the command manager */
1146 if (hba->cmd_mgr) {
1147 bnx2fc_cmd_mgr_free(hba->cmd_mgr);
1148 hba->cmd_mgr = NULL;
1149 }
1150 dev_put(netdev);
1151 module_put(THIS_MODULE);
1152 }
1153
1154 static inline void bnx2fc_interface_get(struct bnx2fc_hba *hba)
1155 {
1156 kref_get(&hba->kref);
1157 }
1158
1159 static inline void bnx2fc_interface_put(struct bnx2fc_hba *hba)
1160 {
1161 kref_put(&hba->kref, bnx2fc_interface_release);
1162 }
1163 static void bnx2fc_interface_destroy(struct bnx2fc_hba *hba)
1164 {
1165 bnx2fc_unbind_pcidev(hba);
1166 kfree(hba);
1167 }
1168
1169 /**
1170 * bnx2fc_interface_create - create a new fcoe instance
1171 *
1172 * @cnic: pointer to cnic device
1173 *
1174 * Creates a new FCoE instance on the given device which include allocating
1175 * hba structure, scsi_host and lport structures.
1176 */
1177 static struct bnx2fc_hba *bnx2fc_interface_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 goto bind_err;
1194 hba->phys_dev = cnic->netdev;
1195 /* will get overwritten after we do vlan discovery */
1196 hba->netdev = hba->phys_dev;
1197
1198 init_waitqueue_head(&hba->shutdown_wait);
1199 init_waitqueue_head(&hba->destroy_wait);
1200
1201 return hba;
1202 bind_err:
1203 printk(KERN_ERR PFX "create_interface: bind error\n");
1204 kfree(hba);
1205 return NULL;
1206 }
1207
1208 static int bnx2fc_interface_setup(struct bnx2fc_hba *hba,
1209 enum fip_state fip_mode)
1210 {
1211 int rc = 0;
1212 struct net_device *netdev = hba->netdev;
1213 struct fcoe_ctlr *fip = &hba->ctlr;
1214
1215 dev_hold(netdev);
1216 kref_init(&hba->kref);
1217
1218 hba->flags = 0;
1219
1220 /* Initialize FIP */
1221 memset(fip, 0, sizeof(*fip));
1222 fcoe_ctlr_init(fip, fip_mode);
1223 hba->ctlr.send = bnx2fc_fip_send;
1224 hba->ctlr.update_mac = bnx2fc_update_src_mac;
1225 hba->ctlr.get_src_addr = bnx2fc_get_src_mac;
1226 set_bit(BNX2FC_CTLR_INIT_DONE, &hba->init_done);
1227
1228 INIT_LIST_HEAD(&hba->vports);
1229 rc = bnx2fc_netdev_setup(hba);
1230 if (rc)
1231 goto setup_err;
1232
1233 hba->next_conn_id = 0;
1234
1235 memset(hba->tgt_ofld_list, 0, sizeof(hba->tgt_ofld_list));
1236 hba->num_ofld_sess = 0;
1237
1238 return 0;
1239
1240 setup_err:
1241 fcoe_ctlr_destroy(&hba->ctlr);
1242 dev_put(netdev);
1243 bnx2fc_interface_put(hba);
1244 return rc;
1245 }
1246
1247 /**
1248 * bnx2fc_if_create - Create FCoE instance on a given interface
1249 *
1250 * @hba: FCoE interface to create a local port on
1251 * @parent: Device pointer to be the parent in sysfs for the SCSI host
1252 * @npiv: Indicates if the port is vport or not
1253 *
1254 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1255 *
1256 * Returns: Allocated fc_lport or an error pointer
1257 */
1258 static struct fc_lport *bnx2fc_if_create(struct bnx2fc_hba *hba,
1259 struct device *parent, int npiv)
1260 {
1261 struct fc_lport *lport, *n_port;
1262 struct fcoe_port *port;
1263 struct Scsi_Host *shost;
1264 struct fc_vport *vport = dev_to_vport(parent);
1265 struct bnx2fc_lport *blport;
1266 int rc = 0;
1267
1268 blport = kzalloc(sizeof(struct bnx2fc_lport), GFP_KERNEL);
1269 if (!blport) {
1270 BNX2FC_HBA_DBG(hba->ctlr.lp, "Unable to alloc bnx2fc_lport\n");
1271 return NULL;
1272 }
1273
1274 /* Allocate Scsi_Host structure */
1275 if (!npiv)
1276 lport = libfc_host_alloc(&bnx2fc_shost_template, sizeof(*port));
1277 else
1278 lport = libfc_vport_create(vport, sizeof(*port));
1279
1280 if (!lport) {
1281 printk(KERN_ERR PFX "could not allocate scsi host structure\n");
1282 goto free_blport;
1283 }
1284 shost = lport->host;
1285 port = lport_priv(lport);
1286 port->lport = lport;
1287 port->priv = hba;
1288 INIT_WORK(&port->destroy_work, bnx2fc_destroy_work);
1289
1290 /* Configure fcoe_port */
1291 rc = bnx2fc_lport_config(lport);
1292 if (rc)
1293 goto lp_config_err;
1294
1295 if (npiv) {
1296 printk(KERN_ERR PFX "Setting vport names, 0x%llX 0x%llX\n",
1297 vport->node_name, vport->port_name);
1298 fc_set_wwnn(lport, vport->node_name);
1299 fc_set_wwpn(lport, vport->port_name);
1300 }
1301 /* Configure netdev and networking properties of the lport */
1302 rc = bnx2fc_net_config(lport);
1303 if (rc) {
1304 printk(KERN_ERR PFX "Error on bnx2fc_net_config\n");
1305 goto lp_config_err;
1306 }
1307
1308 rc = bnx2fc_shost_config(lport, parent);
1309 if (rc) {
1310 printk(KERN_ERR PFX "Couldnt configure shost for %s\n",
1311 hba->netdev->name);
1312 goto lp_config_err;
1313 }
1314
1315 /* Initialize the libfc library */
1316 rc = bnx2fc_libfc_config(lport);
1317 if (rc) {
1318 printk(KERN_ERR PFX "Couldnt configure libfc\n");
1319 goto shost_err;
1320 }
1321 fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;
1322
1323 /* Allocate exchange manager */
1324 if (!npiv)
1325 rc = bnx2fc_em_config(lport);
1326 else {
1327 shost = vport_to_shost(vport);
1328 n_port = shost_priv(shost);
1329 rc = fc_exch_mgr_list_clone(n_port, lport);
1330 }
1331
1332 if (rc) {
1333 printk(KERN_ERR PFX "Error on bnx2fc_em_config\n");
1334 goto shost_err;
1335 }
1336
1337 bnx2fc_interface_get(hba);
1338
1339 spin_lock_bh(&hba->hba_lock);
1340 blport->lport = lport;
1341 list_add_tail(&blport->list, &hba->vports);
1342 spin_unlock_bh(&hba->hba_lock);
1343
1344 return lport;
1345
1346 shost_err:
1347 scsi_remove_host(shost);
1348 lp_config_err:
1349 scsi_host_put(lport->host);
1350 free_blport:
1351 kfree(blport);
1352 return NULL;
1353 }
1354
1355 static void bnx2fc_netdev_cleanup(struct bnx2fc_hba *hba)
1356 {
1357 /* Dont listen for Ethernet packets anymore */
1358 __dev_remove_pack(&hba->fcoe_packet_type);
1359 __dev_remove_pack(&hba->fip_packet_type);
1360 synchronize_net();
1361 }
1362
1363 static void bnx2fc_if_destroy(struct fc_lport *lport)
1364 {
1365 struct fcoe_port *port = lport_priv(lport);
1366 struct bnx2fc_hba *hba = port->priv;
1367 struct bnx2fc_lport *blport, *tmp;
1368
1369 BNX2FC_HBA_DBG(hba->ctlr.lp, "ENTERED bnx2fc_if_destroy\n");
1370 /* Stop the transmit retry timer */
1371 del_timer_sync(&port->timer);
1372
1373 /* Free existing transmit skbs */
1374 fcoe_clean_pending_queue(lport);
1375
1376 /* Free queued packets for the receive thread */
1377 bnx2fc_clean_rx_queue(lport);
1378
1379 /* Detach from scsi-ml */
1380 fc_remove_host(lport->host);
1381 scsi_remove_host(lport->host);
1382
1383 /*
1384 * Note that only the physical lport will have the exchange manager.
1385 * for vports, this function is NOP
1386 */
1387 fc_exch_mgr_free(lport);
1388
1389 /* Free memory used by statistical counters */
1390 fc_lport_free_stats(lport);
1391
1392 spin_lock_bh(&hba->hba_lock);
1393 list_for_each_entry_safe(blport, tmp, &hba->vports, list) {
1394 if (blport->lport == lport) {
1395 list_del(&blport->list);
1396 kfree(blport);
1397 }
1398 }
1399 spin_unlock_bh(&hba->hba_lock);
1400
1401 /* Release Scsi_Host */
1402 scsi_host_put(lport->host);
1403
1404 bnx2fc_interface_put(hba);
1405 }
1406
1407 /**
1408 * bnx2fc_destroy - Destroy a bnx2fc FCoE interface
1409 *
1410 * @buffer: The name of the Ethernet interface to be destroyed
1411 * @kp: The associated kernel parameter
1412 *
1413 * Called from sysfs.
1414 *
1415 * Returns: 0 for success
1416 */
1417 static int bnx2fc_destroy(struct net_device *netdev)
1418 {
1419 struct bnx2fc_hba *hba = NULL;
1420 struct net_device *phys_dev;
1421 int rc = 0;
1422
1423 rtnl_lock();
1424
1425 mutex_lock(&bnx2fc_dev_lock);
1426 /* obtain physical netdev */
1427 if (netdev->priv_flags & IFF_802_1Q_VLAN)
1428 phys_dev = vlan_dev_real_dev(netdev);
1429 else {
1430 printk(KERN_ERR PFX "Not a vlan device\n");
1431 rc = -ENODEV;
1432 goto netdev_err;
1433 }
1434
1435 hba = bnx2fc_hba_lookup(phys_dev);
1436 if (!hba || !hba->ctlr.lp) {
1437 rc = -ENODEV;
1438 printk(KERN_ERR PFX "bnx2fc_destroy: hba or lport not found\n");
1439 goto netdev_err;
1440 }
1441
1442 if (!test_bit(BNX2FC_CREATE_DONE, &hba->init_done)) {
1443 printk(KERN_ERR PFX "bnx2fc_destroy: Create not called\n");
1444 goto netdev_err;
1445 }
1446
1447 bnx2fc_netdev_cleanup(hba);
1448
1449 bnx2fc_stop(hba);
1450
1451 bnx2fc_if_destroy(hba->ctlr.lp);
1452
1453 destroy_workqueue(hba->timer_work_queue);
1454
1455 if (test_bit(BNX2FC_FW_INIT_DONE, &hba->init_done))
1456 bnx2fc_fw_destroy(hba);
1457
1458 clear_bit(BNX2FC_CREATE_DONE, &hba->init_done);
1459 netdev_err:
1460 mutex_unlock(&bnx2fc_dev_lock);
1461 rtnl_unlock();
1462 return rc;
1463 }
1464
1465 static void bnx2fc_destroy_work(struct work_struct *work)
1466 {
1467 struct fcoe_port *port;
1468 struct fc_lport *lport;
1469
1470 port = container_of(work, struct fcoe_port, destroy_work);
1471 lport = port->lport;
1472
1473 BNX2FC_HBA_DBG(lport, "Entered bnx2fc_destroy_work\n");
1474
1475 bnx2fc_port_shutdown(lport);
1476 rtnl_lock();
1477 mutex_lock(&bnx2fc_dev_lock);
1478 bnx2fc_if_destroy(lport);
1479 mutex_unlock(&bnx2fc_dev_lock);
1480 rtnl_unlock();
1481 }
1482
1483 static void bnx2fc_unbind_adapter_devices(struct bnx2fc_hba *hba)
1484 {
1485 bnx2fc_free_fw_resc(hba);
1486 bnx2fc_free_task_ctx(hba);
1487 }
1488
1489 /**
1490 * bnx2fc_bind_adapter_devices - binds bnx2fc adapter with the associated
1491 * pci structure
1492 *
1493 * @hba: Adapter instance
1494 */
1495 static int bnx2fc_bind_adapter_devices(struct bnx2fc_hba *hba)
1496 {
1497 if (bnx2fc_setup_task_ctx(hba))
1498 goto mem_err;
1499
1500 if (bnx2fc_setup_fw_resc(hba))
1501 goto mem_err;
1502
1503 return 0;
1504 mem_err:
1505 bnx2fc_unbind_adapter_devices(hba);
1506 return -ENOMEM;
1507 }
1508
1509 static int bnx2fc_bind_pcidev(struct bnx2fc_hba *hba)
1510 {
1511 struct cnic_dev *cnic;
1512
1513 if (!hba->cnic) {
1514 printk(KERN_ERR PFX "cnic is NULL\n");
1515 return -ENODEV;
1516 }
1517 cnic = hba->cnic;
1518 hba->pcidev = cnic->pcidev;
1519 if (hba->pcidev)
1520 pci_dev_get(hba->pcidev);
1521
1522 return 0;
1523 }
1524
1525 static void bnx2fc_unbind_pcidev(struct bnx2fc_hba *hba)
1526 {
1527 if (hba->pcidev)
1528 pci_dev_put(hba->pcidev);
1529 hba->pcidev = NULL;
1530 }
1531
1532
1533
1534 /**
1535 * bnx2fc_ulp_start - cnic callback to initialize & start adapter instance
1536 *
1537 * @handle: transport handle pointing to adapter struture
1538 *
1539 * This function maps adapter structure to pcidev structure and initiates
1540 * firmware handshake to enable/initialize on-chip FCoE components.
1541 * This bnx2fc - cnic interface api callback is used after following
1542 * conditions are met -
1543 * a) underlying network interface is up (marked by event NETDEV_UP
1544 * from netdev
1545 * b) bnx2fc adatper structure is registered.
1546 */
1547 static void bnx2fc_ulp_start(void *handle)
1548 {
1549 struct bnx2fc_hba *hba = handle;
1550 struct fc_lport *lport = hba->ctlr.lp;
1551
1552 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1553 mutex_lock(&bnx2fc_dev_lock);
1554
1555 if (test_bit(BNX2FC_FW_INIT_DONE, &hba->init_done))
1556 goto start_disc;
1557
1558 if (test_bit(BNX2FC_CREATE_DONE, &hba->init_done))
1559 bnx2fc_fw_init(hba);
1560
1561 start_disc:
1562 mutex_unlock(&bnx2fc_dev_lock);
1563
1564 BNX2FC_MISC_DBG("bnx2fc started.\n");
1565
1566 /* Kick off Fabric discovery*/
1567 if (test_bit(BNX2FC_CREATE_DONE, &hba->init_done)) {
1568 printk(KERN_ERR PFX "ulp_init: start discovery\n");
1569 lport->tt.frame_send = bnx2fc_xmit;
1570 bnx2fc_start_disc(hba);
1571 }
1572 }
1573
1574 static void bnx2fc_port_shutdown(struct fc_lport *lport)
1575 {
1576 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1577 fc_fabric_logoff(lport);
1578 fc_lport_destroy(lport);
1579 }
1580
1581 static void bnx2fc_stop(struct bnx2fc_hba *hba)
1582 {
1583 struct fc_lport *lport;
1584 struct fc_lport *vport;
1585
1586 BNX2FC_MISC_DBG("ENTERED %s - init_done = %ld\n", __func__,
1587 hba->init_done);
1588 if (test_bit(BNX2FC_FW_INIT_DONE, &hba->init_done) &&
1589 test_bit(BNX2FC_CREATE_DONE, &hba->init_done)) {
1590 lport = hba->ctlr.lp;
1591 bnx2fc_port_shutdown(lport);
1592 BNX2FC_HBA_DBG(lport, "bnx2fc_stop: waiting for %d "
1593 "offloaded sessions\n",
1594 hba->num_ofld_sess);
1595 wait_event_interruptible(hba->shutdown_wait,
1596 (hba->num_ofld_sess == 0));
1597 mutex_lock(&lport->lp_mutex);
1598 list_for_each_entry(vport, &lport->vports, list)
1599 fc_host_port_type(vport->host) = FC_PORTTYPE_UNKNOWN;
1600 mutex_unlock(&lport->lp_mutex);
1601 fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;
1602 fcoe_ctlr_link_down(&hba->ctlr);
1603 fcoe_clean_pending_queue(lport);
1604
1605 mutex_lock(&hba->hba_mutex);
1606 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
1607 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
1608
1609 clear_bit(ADAPTER_STATE_READY, &hba->adapter_state);
1610 mutex_unlock(&hba->hba_mutex);
1611 }
1612 }
1613
1614 static int bnx2fc_fw_init(struct bnx2fc_hba *hba)
1615 {
1616 #define BNX2FC_INIT_POLL_TIME (1000 / HZ)
1617 int rc = -1;
1618 int i = HZ;
1619
1620 rc = bnx2fc_bind_adapter_devices(hba);
1621 if (rc) {
1622 printk(KERN_ALERT PFX
1623 "bnx2fc_bind_adapter_devices failed - rc = %d\n", rc);
1624 goto err_out;
1625 }
1626
1627 rc = bnx2fc_send_fw_fcoe_init_msg(hba);
1628 if (rc) {
1629 printk(KERN_ALERT PFX
1630 "bnx2fc_send_fw_fcoe_init_msg failed - rc = %d\n", rc);
1631 goto err_unbind;
1632 }
1633
1634 /*
1635 * Wait until the adapter init message is complete, and adapter
1636 * state is UP.
1637 */
1638 while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--)
1639 msleep(BNX2FC_INIT_POLL_TIME);
1640
1641 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) {
1642 printk(KERN_ERR PFX "bnx2fc_start: %s failed to initialize. "
1643 "Ignoring...\n",
1644 hba->cnic->netdev->name);
1645 rc = -1;
1646 goto err_unbind;
1647 }
1648
1649
1650 /* Mark HBA to indicate that the FW INIT is done */
1651 set_bit(BNX2FC_FW_INIT_DONE, &hba->init_done);
1652 return 0;
1653
1654 err_unbind:
1655 bnx2fc_unbind_adapter_devices(hba);
1656 err_out:
1657 return rc;
1658 }
1659
1660 static void bnx2fc_fw_destroy(struct bnx2fc_hba *hba)
1661 {
1662 if (test_and_clear_bit(BNX2FC_FW_INIT_DONE, &hba->init_done)) {
1663 if (bnx2fc_send_fw_fcoe_destroy_msg(hba) == 0) {
1664 init_timer(&hba->destroy_timer);
1665 hba->destroy_timer.expires = BNX2FC_FW_TIMEOUT +
1666 jiffies;
1667 hba->destroy_timer.function = bnx2fc_destroy_timer;
1668 hba->destroy_timer.data = (unsigned long)hba;
1669 add_timer(&hba->destroy_timer);
1670 wait_event_interruptible(hba->destroy_wait,
1671 (hba->flags &
1672 BNX2FC_FLAG_DESTROY_CMPL));
1673 /* This should never happen */
1674 if (signal_pending(current))
1675 flush_signals(current);
1676
1677 del_timer_sync(&hba->destroy_timer);
1678 }
1679 bnx2fc_unbind_adapter_devices(hba);
1680 }
1681 }
1682
1683 /**
1684 * bnx2fc_ulp_stop - cnic callback to shutdown adapter instance
1685 *
1686 * @handle: transport handle pointing to adapter structure
1687 *
1688 * Driver checks if adapter is already in shutdown mode, if not start
1689 * the shutdown process.
1690 */
1691 static void bnx2fc_ulp_stop(void *handle)
1692 {
1693 struct bnx2fc_hba *hba = (struct bnx2fc_hba *)handle;
1694
1695 printk(KERN_ERR "ULP_STOP\n");
1696
1697 mutex_lock(&bnx2fc_dev_lock);
1698 bnx2fc_stop(hba);
1699 bnx2fc_fw_destroy(hba);
1700 mutex_unlock(&bnx2fc_dev_lock);
1701 }
1702
1703 static void bnx2fc_start_disc(struct bnx2fc_hba *hba)
1704 {
1705 struct fc_lport *lport;
1706 int wait_cnt = 0;
1707
1708 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1709 /* Kick off FIP/FLOGI */
1710 if (!test_bit(BNX2FC_FW_INIT_DONE, &hba->init_done)) {
1711 printk(KERN_ERR PFX "Init not done yet\n");
1712 return;
1713 }
1714
1715 lport = hba->ctlr.lp;
1716 BNX2FC_HBA_DBG(lport, "calling fc_fabric_login\n");
1717
1718 if (!bnx2fc_link_ok(lport)) {
1719 BNX2FC_HBA_DBG(lport, "ctlr_link_up\n");
1720 fcoe_ctlr_link_up(&hba->ctlr);
1721 fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1722 set_bit(ADAPTER_STATE_READY, &hba->adapter_state);
1723 }
1724
1725 /* wait for the FCF to be selected before issuing FLOGI */
1726 while (!hba->ctlr.sel_fcf) {
1727 msleep(250);
1728 /* give up after 3 secs */
1729 if (++wait_cnt > 12)
1730 break;
1731 }
1732 fc_lport_init(lport);
1733 fc_fabric_login(lport);
1734 }
1735
1736
1737 /**
1738 * bnx2fc_ulp_init - Initialize an adapter instance
1739 *
1740 * @dev : cnic device handle
1741 * Called from cnic_register_driver() context to initialize all
1742 * enumerated cnic devices. This routine allocates adapter structure
1743 * and other device specific resources.
1744 */
1745 static void bnx2fc_ulp_init(struct cnic_dev *dev)
1746 {
1747 struct bnx2fc_hba *hba;
1748 int rc = 0;
1749
1750 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1751 /* bnx2fc works only when bnx2x is loaded */
1752 if (!test_bit(CNIC_F_BNX2X_CLASS, &dev->flags)) {
1753 printk(KERN_ERR PFX "bnx2fc FCoE not supported on %s,"
1754 " flags: %lx\n",
1755 dev->netdev->name, dev->flags);
1756 return;
1757 }
1758
1759 /* Configure FCoE interface */
1760 hba = bnx2fc_interface_create(dev);
1761 if (!hba) {
1762 printk(KERN_ERR PFX "hba initialization failed\n");
1763 return;
1764 }
1765
1766 /* Add HBA to the adapter list */
1767 mutex_lock(&bnx2fc_dev_lock);
1768 list_add_tail(&hba->link, &adapter_list);
1769 adapter_count++;
1770 mutex_unlock(&bnx2fc_dev_lock);
1771
1772 clear_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic);
1773 rc = dev->register_device(dev, CNIC_ULP_FCOE,
1774 (void *) hba);
1775 if (rc)
1776 printk(KERN_ALERT PFX "register_device failed, rc = %d\n", rc);
1777 else
1778 set_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic);
1779 }
1780
1781
1782 static int bnx2fc_disable(struct net_device *netdev)
1783 {
1784 struct bnx2fc_hba *hba;
1785 struct net_device *phys_dev;
1786 struct ethtool_drvinfo drvinfo;
1787 int rc = 0;
1788
1789 rtnl_lock();
1790
1791 mutex_lock(&bnx2fc_dev_lock);
1792
1793 /* obtain physical netdev */
1794 if (netdev->priv_flags & IFF_802_1Q_VLAN)
1795 phys_dev = vlan_dev_real_dev(netdev);
1796 else {
1797 printk(KERN_ERR PFX "Not a vlan device\n");
1798 rc = -ENODEV;
1799 goto nodev;
1800 }
1801
1802 /* verify if the physical device is a netxtreme2 device */
1803 if (phys_dev->ethtool_ops && phys_dev->ethtool_ops->get_drvinfo) {
1804 memset(&drvinfo, 0, sizeof(drvinfo));
1805 phys_dev->ethtool_ops->get_drvinfo(phys_dev, &drvinfo);
1806 if (strcmp(drvinfo.driver, "bnx2x")) {
1807 printk(KERN_ERR PFX "Not a netxtreme2 device\n");
1808 rc = -ENODEV;
1809 goto nodev;
1810 }
1811 } else {
1812 printk(KERN_ERR PFX "unable to obtain drv_info\n");
1813 rc = -ENODEV;
1814 goto nodev;
1815 }
1816
1817 printk(KERN_ERR PFX "phys_dev is netxtreme2 device\n");
1818
1819 /* obtain hba and initialize rest of the structure */
1820 hba = bnx2fc_hba_lookup(phys_dev);
1821 if (!hba || !hba->ctlr.lp) {
1822 rc = -ENODEV;
1823 printk(KERN_ERR PFX "bnx2fc_disable: hba or lport not found\n");
1824 } else {
1825 fcoe_ctlr_link_down(&hba->ctlr);
1826 fcoe_clean_pending_queue(hba->ctlr.lp);
1827 }
1828
1829 nodev:
1830 mutex_unlock(&bnx2fc_dev_lock);
1831 rtnl_unlock();
1832 return rc;
1833 }
1834
1835
1836 static int bnx2fc_enable(struct net_device *netdev)
1837 {
1838 struct bnx2fc_hba *hba;
1839 struct net_device *phys_dev;
1840 struct ethtool_drvinfo drvinfo;
1841 int rc = 0;
1842
1843 rtnl_lock();
1844
1845 BNX2FC_MISC_DBG("Entered %s\n", __func__);
1846 mutex_lock(&bnx2fc_dev_lock);
1847
1848 /* obtain physical netdev */
1849 if (netdev->priv_flags & IFF_802_1Q_VLAN)
1850 phys_dev = vlan_dev_real_dev(netdev);
1851 else {
1852 printk(KERN_ERR PFX "Not a vlan device\n");
1853 rc = -ENODEV;
1854 goto nodev;
1855 }
1856 /* verify if the physical device is a netxtreme2 device */
1857 if (phys_dev->ethtool_ops && phys_dev->ethtool_ops->get_drvinfo) {
1858 memset(&drvinfo, 0, sizeof(drvinfo));
1859 phys_dev->ethtool_ops->get_drvinfo(phys_dev, &drvinfo);
1860 if (strcmp(drvinfo.driver, "bnx2x")) {
1861 printk(KERN_ERR PFX "Not a netxtreme2 device\n");
1862 rc = -ENODEV;
1863 goto nodev;
1864 }
1865 } else {
1866 printk(KERN_ERR PFX "unable to obtain drv_info\n");
1867 rc = -ENODEV;
1868 goto nodev;
1869 }
1870
1871 /* obtain hba and initialize rest of the structure */
1872 hba = bnx2fc_hba_lookup(phys_dev);
1873 if (!hba || !hba->ctlr.lp) {
1874 rc = -ENODEV;
1875 printk(KERN_ERR PFX "bnx2fc_enable: hba or lport not found\n");
1876 } else if (!bnx2fc_link_ok(hba->ctlr.lp))
1877 fcoe_ctlr_link_up(&hba->ctlr);
1878
1879 nodev:
1880 mutex_unlock(&bnx2fc_dev_lock);
1881 rtnl_unlock();
1882 return rc;
1883 }
1884
1885 /**
1886 * bnx2fc_create - Create bnx2fc FCoE interface
1887 *
1888 * @buffer: The name of Ethernet interface to create on
1889 * @kp: The associated kernel param
1890 *
1891 * Called from sysfs.
1892 *
1893 * Returns: 0 for success
1894 */
1895 static int bnx2fc_create(struct net_device *netdev, enum fip_state fip_mode)
1896 {
1897 struct bnx2fc_hba *hba;
1898 struct net_device *phys_dev;
1899 struct fc_lport *lport;
1900 struct ethtool_drvinfo drvinfo;
1901 int rc = 0;
1902 int vlan_id;
1903
1904 BNX2FC_MISC_DBG("Entered bnx2fc_create\n");
1905 if (fip_mode != FIP_MODE_FABRIC) {
1906 printk(KERN_ERR "fip mode not FABRIC\n");
1907 return -EIO;
1908 }
1909
1910 rtnl_lock();
1911
1912 mutex_lock(&bnx2fc_dev_lock);
1913
1914 if (!try_module_get(THIS_MODULE)) {
1915 rc = -EINVAL;
1916 goto mod_err;
1917 }
1918
1919 /* obtain physical netdev */
1920 if (netdev->priv_flags & IFF_802_1Q_VLAN) {
1921 phys_dev = vlan_dev_real_dev(netdev);
1922 vlan_id = vlan_dev_vlan_id(netdev);
1923 } else {
1924 printk(KERN_ERR PFX "Not a vlan device\n");
1925 rc = -EINVAL;
1926 goto netdev_err;
1927 }
1928 /* verify if the physical device is a netxtreme2 device */
1929 if (phys_dev->ethtool_ops && phys_dev->ethtool_ops->get_drvinfo) {
1930 memset(&drvinfo, 0, sizeof(drvinfo));
1931 phys_dev->ethtool_ops->get_drvinfo(phys_dev, &drvinfo);
1932 if (strcmp(drvinfo.driver, "bnx2x")) {
1933 printk(KERN_ERR PFX "Not a netxtreme2 device\n");
1934 rc = -EINVAL;
1935 goto netdev_err;
1936 }
1937 } else {
1938 printk(KERN_ERR PFX "unable to obtain drv_info\n");
1939 rc = -EINVAL;
1940 goto netdev_err;
1941 }
1942
1943 /* obtain hba and initialize rest of the structure */
1944 hba = bnx2fc_hba_lookup(phys_dev);
1945 if (!hba) {
1946 rc = -ENODEV;
1947 printk(KERN_ERR PFX "bnx2fc_create: hba not found\n");
1948 goto netdev_err;
1949 }
1950
1951 if (!test_bit(BNX2FC_FW_INIT_DONE, &hba->init_done)) {
1952 rc = bnx2fc_fw_init(hba);
1953 if (rc)
1954 goto netdev_err;
1955 }
1956
1957 if (test_bit(BNX2FC_CREATE_DONE, &hba->init_done)) {
1958 rc = -EEXIST;
1959 goto netdev_err;
1960 }
1961
1962 /* update netdev with vlan netdev */
1963 hba->netdev = netdev;
1964 hba->vlan_id = vlan_id;
1965 hba->vlan_enabled = 1;
1966
1967 rc = bnx2fc_interface_setup(hba, fip_mode);
1968 if (rc) {
1969 printk(KERN_ERR PFX "bnx2fc_interface_setup failed\n");
1970 goto ifput_err;
1971 }
1972
1973 hba->timer_work_queue =
1974 create_singlethread_workqueue("bnx2fc_timer_wq");
1975 if (!hba->timer_work_queue) {
1976 printk(KERN_ERR PFX "ulp_init could not create timer_wq\n");
1977 rc = -EINVAL;
1978 goto ifput_err;
1979 }
1980
1981 lport = bnx2fc_if_create(hba, &hba->pcidev->dev, 0);
1982 if (!lport) {
1983 printk(KERN_ERR PFX "Failed to create interface (%s)\n",
1984 netdev->name);
1985 bnx2fc_netdev_cleanup(hba);
1986 rc = -EINVAL;
1987 goto if_create_err;
1988 }
1989
1990 lport->boot_time = jiffies;
1991
1992 /* Make this master N_port */
1993 hba->ctlr.lp = lport;
1994
1995 set_bit(BNX2FC_CREATE_DONE, &hba->init_done);
1996 printk(KERN_ERR PFX "create: START DISC\n");
1997 bnx2fc_start_disc(hba);
1998 /*
1999 * Release from kref_init in bnx2fc_interface_setup, on success
2000 * lport should be holding a reference taken in bnx2fc_if_create
2001 */
2002 bnx2fc_interface_put(hba);
2003 /* put netdev that was held while calling dev_get_by_name */
2004 mutex_unlock(&bnx2fc_dev_lock);
2005 rtnl_unlock();
2006 return 0;
2007
2008 if_create_err:
2009 destroy_workqueue(hba->timer_work_queue);
2010 ifput_err:
2011 bnx2fc_interface_put(hba);
2012 netdev_err:
2013 module_put(THIS_MODULE);
2014 mod_err:
2015 mutex_unlock(&bnx2fc_dev_lock);
2016 rtnl_unlock();
2017 return rc;
2018 }
2019
2020 /**
2021 * bnx2fc_find_hba_for_cnic - maps cnic instance to bnx2fc adapter instance
2022 *
2023 * @cnic: Pointer to cnic device instance
2024 *
2025 **/
2026 static struct bnx2fc_hba *bnx2fc_find_hba_for_cnic(struct cnic_dev *cnic)
2027 {
2028 struct list_head *list;
2029 struct list_head *temp;
2030 struct bnx2fc_hba *hba;
2031
2032 /* Called with bnx2fc_dev_lock held */
2033 list_for_each_safe(list, temp, &adapter_list) {
2034 hba = (struct bnx2fc_hba *)list;
2035 if (hba->cnic == cnic)
2036 return hba;
2037 }
2038 return NULL;
2039 }
2040
2041 static struct bnx2fc_hba *bnx2fc_hba_lookup(struct net_device *phys_dev)
2042 {
2043 struct list_head *list;
2044 struct list_head *temp;
2045 struct bnx2fc_hba *hba;
2046
2047 /* Called with bnx2fc_dev_lock held */
2048 list_for_each_safe(list, temp, &adapter_list) {
2049 hba = (struct bnx2fc_hba *)list;
2050 if (hba->phys_dev == phys_dev)
2051 return hba;
2052 }
2053 printk(KERN_ERR PFX "hba_lookup: hba NULL\n");
2054 return NULL;
2055 }
2056
2057 /**
2058 * bnx2fc_ulp_exit - shuts down adapter instance and frees all resources
2059 *
2060 * @dev cnic device handle
2061 */
2062 static void bnx2fc_ulp_exit(struct cnic_dev *dev)
2063 {
2064 struct bnx2fc_hba *hba;
2065
2066 BNX2FC_MISC_DBG("Entered bnx2fc_ulp_exit\n");
2067
2068 if (!test_bit(CNIC_F_BNX2X_CLASS, &dev->flags)) {
2069 printk(KERN_ERR PFX "bnx2fc port check: %s, flags: %lx\n",
2070 dev->netdev->name, dev->flags);
2071 return;
2072 }
2073
2074 mutex_lock(&bnx2fc_dev_lock);
2075 hba = bnx2fc_find_hba_for_cnic(dev);
2076 if (!hba) {
2077 printk(KERN_ERR PFX "bnx2fc_ulp_exit: hba not found, dev 0%p\n",
2078 dev);
2079 mutex_unlock(&bnx2fc_dev_lock);
2080 return;
2081 }
2082
2083 list_del_init(&hba->link);
2084 adapter_count--;
2085
2086 if (test_bit(BNX2FC_CREATE_DONE, &hba->init_done)) {
2087 /* destroy not called yet, move to quiesced list */
2088 bnx2fc_netdev_cleanup(hba);
2089 bnx2fc_if_destroy(hba->ctlr.lp);
2090 }
2091 mutex_unlock(&bnx2fc_dev_lock);
2092
2093 bnx2fc_ulp_stop(hba);
2094 /* unregister cnic device */
2095 if (test_and_clear_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic))
2096 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_FCOE);
2097 bnx2fc_interface_destroy(hba);
2098 }
2099
2100 /**
2101 * bnx2fc_fcoe_reset - Resets the fcoe
2102 *
2103 * @shost: shost the reset is from
2104 *
2105 * Returns: always 0
2106 */
2107 static int bnx2fc_fcoe_reset(struct Scsi_Host *shost)
2108 {
2109 struct fc_lport *lport = shost_priv(shost);
2110 fc_lport_reset(lport);
2111 return 0;
2112 }
2113
2114
2115 static bool bnx2fc_match(struct net_device *netdev)
2116 {
2117 mutex_lock(&bnx2fc_dev_lock);
2118 if (netdev->priv_flags & IFF_802_1Q_VLAN) {
2119 struct net_device *phys_dev = vlan_dev_real_dev(netdev);
2120
2121 if (bnx2fc_hba_lookup(phys_dev)) {
2122 mutex_unlock(&bnx2fc_dev_lock);
2123 return true;
2124 }
2125 }
2126 mutex_unlock(&bnx2fc_dev_lock);
2127 return false;
2128 }
2129
2130
2131 static struct fcoe_transport bnx2fc_transport = {
2132 .name = {"bnx2fc"},
2133 .attached = false,
2134 .list = LIST_HEAD_INIT(bnx2fc_transport.list),
2135 .match = bnx2fc_match,
2136 .create = bnx2fc_create,
2137 .destroy = bnx2fc_destroy,
2138 .enable = bnx2fc_enable,
2139 .disable = bnx2fc_disable,
2140 };
2141
2142 /**
2143 * bnx2fc_percpu_thread_create - Create a receive thread for an
2144 * online CPU
2145 *
2146 * @cpu: cpu index for the online cpu
2147 */
2148 static void bnx2fc_percpu_thread_create(unsigned int cpu)
2149 {
2150 struct bnx2fc_percpu_s *p;
2151 struct task_struct *thread;
2152
2153 p = &per_cpu(bnx2fc_percpu, cpu);
2154
2155 thread = kthread_create(bnx2fc_percpu_io_thread,
2156 (void *)p,
2157 "bnx2fc_thread/%d", cpu);
2158 /* bind thread to the cpu */
2159 if (likely(!IS_ERR(p->iothread))) {
2160 kthread_bind(thread, cpu);
2161 p->iothread = thread;
2162 wake_up_process(thread);
2163 }
2164 }
2165
2166 static void bnx2fc_percpu_thread_destroy(unsigned int cpu)
2167 {
2168 struct bnx2fc_percpu_s *p;
2169 struct task_struct *thread;
2170 struct bnx2fc_work *work, *tmp;
2171 LIST_HEAD(work_list);
2172
2173 BNX2FC_MISC_DBG("destroying io thread for CPU %d\n", cpu);
2174
2175 /* Prevent any new work from being queued for this CPU */
2176 p = &per_cpu(bnx2fc_percpu, cpu);
2177 spin_lock_bh(&p->fp_work_lock);
2178 thread = p->iothread;
2179 p->iothread = NULL;
2180
2181
2182 /* Free all work in the list */
2183 list_for_each_entry_safe(work, tmp, &work_list, list) {
2184 list_del_init(&work->list);
2185 bnx2fc_process_cq_compl(work->tgt, work->wqe);
2186 kfree(work);
2187 }
2188
2189 spin_unlock_bh(&p->fp_work_lock);
2190
2191 if (thread)
2192 kthread_stop(thread);
2193 }
2194
2195 /**
2196 * bnx2fc_cpu_callback - Handler for CPU hotplug events
2197 *
2198 * @nfb: The callback data block
2199 * @action: The event triggering the callback
2200 * @hcpu: The index of the CPU that the event is for
2201 *
2202 * This creates or destroys per-CPU data for fcoe
2203 *
2204 * Returns NOTIFY_OK always.
2205 */
2206 static int bnx2fc_cpu_callback(struct notifier_block *nfb,
2207 unsigned long action, void *hcpu)
2208 {
2209 unsigned cpu = (unsigned long)hcpu;
2210
2211 switch (action) {
2212 case CPU_ONLINE:
2213 case CPU_ONLINE_FROZEN:
2214 printk(PFX "CPU %x online: Create Rx thread\n", cpu);
2215 bnx2fc_percpu_thread_create(cpu);
2216 break;
2217 case CPU_DEAD:
2218 case CPU_DEAD_FROZEN:
2219 printk(PFX "CPU %x offline: Remove Rx thread\n", cpu);
2220 bnx2fc_percpu_thread_destroy(cpu);
2221 break;
2222 default:
2223 break;
2224 }
2225 return NOTIFY_OK;
2226 }
2227
2228 /**
2229 * bnx2fc_mod_init - module init entry point
2230 *
2231 * Initialize driver wide global data structures, and register
2232 * with cnic module
2233 **/
2234 static int __init bnx2fc_mod_init(void)
2235 {
2236 struct fcoe_percpu_s *bg;
2237 struct task_struct *l2_thread;
2238 int rc = 0;
2239 unsigned int cpu = 0;
2240 struct bnx2fc_percpu_s *p;
2241
2242 printk(KERN_INFO PFX "%s", version);
2243
2244 /* register as a fcoe transport */
2245 rc = fcoe_transport_attach(&bnx2fc_transport);
2246 if (rc) {
2247 printk(KERN_ERR "failed to register an fcoe transport, check "
2248 "if libfcoe is loaded\n");
2249 goto out;
2250 }
2251
2252 INIT_LIST_HEAD(&adapter_list);
2253 mutex_init(&bnx2fc_dev_lock);
2254 adapter_count = 0;
2255
2256 /* Attach FC transport template */
2257 rc = bnx2fc_attach_transport();
2258 if (rc)
2259 goto detach_ft;
2260
2261 bnx2fc_wq = alloc_workqueue("bnx2fc", 0, 0);
2262 if (!bnx2fc_wq) {
2263 rc = -ENOMEM;
2264 goto release_bt;
2265 }
2266
2267 bg = &bnx2fc_global;
2268 skb_queue_head_init(&bg->fcoe_rx_list);
2269 l2_thread = kthread_create(bnx2fc_l2_rcv_thread,
2270 (void *)bg,
2271 "bnx2fc_l2_thread");
2272 if (IS_ERR(l2_thread)) {
2273 rc = PTR_ERR(l2_thread);
2274 goto free_wq;
2275 }
2276 wake_up_process(l2_thread);
2277 spin_lock_bh(&bg->fcoe_rx_list.lock);
2278 bg->thread = l2_thread;
2279 spin_unlock_bh(&bg->fcoe_rx_list.lock);
2280
2281 for_each_possible_cpu(cpu) {
2282 p = &per_cpu(bnx2fc_percpu, cpu);
2283 INIT_LIST_HEAD(&p->work_list);
2284 spin_lock_init(&p->fp_work_lock);
2285 }
2286
2287 for_each_online_cpu(cpu) {
2288 bnx2fc_percpu_thread_create(cpu);
2289 }
2290
2291 /* Initialize per CPU interrupt thread */
2292 register_hotcpu_notifier(&bnx2fc_cpu_notifier);
2293
2294 cnic_register_driver(CNIC_ULP_FCOE, &bnx2fc_cnic_cb);
2295
2296 return 0;
2297
2298 free_wq:
2299 destroy_workqueue(bnx2fc_wq);
2300 release_bt:
2301 bnx2fc_release_transport();
2302 detach_ft:
2303 fcoe_transport_detach(&bnx2fc_transport);
2304 out:
2305 return rc;
2306 }
2307
2308 static void __exit bnx2fc_mod_exit(void)
2309 {
2310 LIST_HEAD(to_be_deleted);
2311 struct bnx2fc_hba *hba, *next;
2312 struct fcoe_percpu_s *bg;
2313 struct task_struct *l2_thread;
2314 struct sk_buff *skb;
2315 unsigned int cpu = 0;
2316
2317 /*
2318 * NOTE: Since cnic calls register_driver routine rtnl_lock,
2319 * it will have higher precedence than bnx2fc_dev_lock.
2320 * unregister_device() cannot be called with bnx2fc_dev_lock
2321 * held.
2322 */
2323 mutex_lock(&bnx2fc_dev_lock);
2324 list_splice(&adapter_list, &to_be_deleted);
2325 INIT_LIST_HEAD(&adapter_list);
2326 adapter_count = 0;
2327 mutex_unlock(&bnx2fc_dev_lock);
2328
2329 /* Unregister with cnic */
2330 list_for_each_entry_safe(hba, next, &to_be_deleted, link) {
2331 list_del_init(&hba->link);
2332 printk(KERN_ERR PFX "MOD_EXIT:destroy hba = 0x%p, kref = %d\n",
2333 hba, atomic_read(&hba->kref.refcount));
2334 bnx2fc_ulp_stop(hba);
2335 /* unregister cnic device */
2336 if (test_and_clear_bit(BNX2FC_CNIC_REGISTERED,
2337 &hba->reg_with_cnic))
2338 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_FCOE);
2339 bnx2fc_interface_destroy(hba);
2340 }
2341 cnic_unregister_driver(CNIC_ULP_FCOE);
2342
2343 /* Destroy global thread */
2344 bg = &bnx2fc_global;
2345 spin_lock_bh(&bg->fcoe_rx_list.lock);
2346 l2_thread = bg->thread;
2347 bg->thread = NULL;
2348 while ((skb = __skb_dequeue(&bg->fcoe_rx_list)) != NULL)
2349 kfree_skb(skb);
2350
2351 spin_unlock_bh(&bg->fcoe_rx_list.lock);
2352
2353 if (l2_thread)
2354 kthread_stop(l2_thread);
2355
2356 unregister_hotcpu_notifier(&bnx2fc_cpu_notifier);
2357
2358 /* Destroy per cpu threads */
2359 for_each_online_cpu(cpu) {
2360 bnx2fc_percpu_thread_destroy(cpu);
2361 }
2362
2363 destroy_workqueue(bnx2fc_wq);
2364 /*
2365 * detach from scsi transport
2366 * must happen after all destroys are done
2367 */
2368 bnx2fc_release_transport();
2369
2370 /* detach from fcoe transport */
2371 fcoe_transport_detach(&bnx2fc_transport);
2372 }
2373
2374 module_init(bnx2fc_mod_init);
2375 module_exit(bnx2fc_mod_exit);
2376
2377 static struct fc_function_template bnx2fc_transport_function = {
2378 .show_host_node_name = 1,
2379 .show_host_port_name = 1,
2380 .show_host_supported_classes = 1,
2381 .show_host_supported_fc4s = 1,
2382 .show_host_active_fc4s = 1,
2383 .show_host_maxframe_size = 1,
2384
2385 .show_host_port_id = 1,
2386 .show_host_supported_speeds = 1,
2387 .get_host_speed = fc_get_host_speed,
2388 .show_host_speed = 1,
2389 .show_host_port_type = 1,
2390 .get_host_port_state = fc_get_host_port_state,
2391 .show_host_port_state = 1,
2392 .show_host_symbolic_name = 1,
2393
2394 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2395 sizeof(struct bnx2fc_rport)),
2396 .show_rport_maxframe_size = 1,
2397 .show_rport_supported_classes = 1,
2398
2399 .show_host_fabric_name = 1,
2400 .show_starget_node_name = 1,
2401 .show_starget_port_name = 1,
2402 .show_starget_port_id = 1,
2403 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2404 .show_rport_dev_loss_tmo = 1,
2405 .get_fc_host_stats = bnx2fc_get_host_stats,
2406
2407 .issue_fc_host_lip = bnx2fc_fcoe_reset,
2408
2409 .terminate_rport_io = fc_rport_terminate_io,
2410
2411 .vport_create = bnx2fc_vport_create,
2412 .vport_delete = bnx2fc_vport_destroy,
2413 .vport_disable = bnx2fc_vport_disable,
2414 };
2415
2416 static struct fc_function_template bnx2fc_vport_xport_function = {
2417 .show_host_node_name = 1,
2418 .show_host_port_name = 1,
2419 .show_host_supported_classes = 1,
2420 .show_host_supported_fc4s = 1,
2421 .show_host_active_fc4s = 1,
2422 .show_host_maxframe_size = 1,
2423
2424 .show_host_port_id = 1,
2425 .show_host_supported_speeds = 1,
2426 .get_host_speed = fc_get_host_speed,
2427 .show_host_speed = 1,
2428 .show_host_port_type = 1,
2429 .get_host_port_state = fc_get_host_port_state,
2430 .show_host_port_state = 1,
2431 .show_host_symbolic_name = 1,
2432
2433 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2434 sizeof(struct bnx2fc_rport)),
2435 .show_rport_maxframe_size = 1,
2436 .show_rport_supported_classes = 1,
2437
2438 .show_host_fabric_name = 1,
2439 .show_starget_node_name = 1,
2440 .show_starget_port_name = 1,
2441 .show_starget_port_id = 1,
2442 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2443 .show_rport_dev_loss_tmo = 1,
2444 .get_fc_host_stats = fc_get_host_stats,
2445 .issue_fc_host_lip = bnx2fc_fcoe_reset,
2446 .terminate_rport_io = fc_rport_terminate_io,
2447 };
2448
2449 /**
2450 * scsi_host_template structure used while registering with SCSI-ml
2451 */
2452 static struct scsi_host_template bnx2fc_shost_template = {
2453 .module = THIS_MODULE,
2454 .name = "Broadcom Offload FCoE Initiator",
2455 .queuecommand = bnx2fc_queuecommand,
2456 .eh_abort_handler = bnx2fc_eh_abort, /* abts */
2457 .eh_device_reset_handler = bnx2fc_eh_device_reset, /* lun reset */
2458 .eh_target_reset_handler = bnx2fc_eh_target_reset, /* tgt reset */
2459 .eh_host_reset_handler = fc_eh_host_reset,
2460 .slave_alloc = fc_slave_alloc,
2461 .change_queue_depth = fc_change_queue_depth,
2462 .change_queue_type = fc_change_queue_type,
2463 .this_id = -1,
2464 .cmd_per_lun = 3,
2465 .can_queue = BNX2FC_CAN_QUEUE,
2466 .use_clustering = ENABLE_CLUSTERING,
2467 .sg_tablesize = BNX2FC_MAX_BDS_PER_CMD,
2468 .max_sectors = 512,
2469 };
2470
2471 static struct libfc_function_template bnx2fc_libfc_fcn_templ = {
2472 .frame_send = bnx2fc_xmit,
2473 .elsct_send = bnx2fc_elsct_send,
2474 .fcp_abort_io = bnx2fc_abort_io,
2475 .fcp_cleanup = bnx2fc_cleanup,
2476 .rport_event_callback = bnx2fc_rport_event_handler,
2477 };
2478
2479 /**
2480 * bnx2fc_cnic_cb - global template of bnx2fc - cnic driver interface
2481 * structure carrying callback function pointers
2482 */
2483 static struct cnic_ulp_ops bnx2fc_cnic_cb = {
2484 .owner = THIS_MODULE,
2485 .cnic_init = bnx2fc_ulp_init,
2486 .cnic_exit = bnx2fc_ulp_exit,
2487 .cnic_start = bnx2fc_ulp_start,
2488 .cnic_stop = bnx2fc_ulp_stop,
2489 .indicate_kcqes = bnx2fc_indicate_kcqe,
2490 .indicate_netevent = bnx2fc_indicate_netevent,
2491 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree