xref: /openbmc/linux/drivers/scsi/fnic/fnic_main.c (revision 3dc4b6fb)
1 /*
2  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
4  *
5  * This program is free software; you may redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; version 2 of the License.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16  * SOFTWARE.
17  */
18 #include <linux/module.h>
19 #include <linux/mempool.h>
20 #include <linux/string.h>
21 #include <linux/slab.h>
22 #include <linux/errno.h>
23 #include <linux/init.h>
24 #include <linux/pci.h>
25 #include <linux/skbuff.h>
26 #include <linux/interrupt.h>
27 #include <linux/spinlock.h>
28 #include <linux/workqueue.h>
29 #include <linux/if_ether.h>
30 #include <scsi/fc/fc_fip.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_fc.h>
34 #include <scsi/scsi_tcq.h>
35 #include <scsi/libfc.h>
36 #include <scsi/fc_frame.h>
37 
38 #include "vnic_dev.h"
39 #include "vnic_intr.h"
40 #include "vnic_stats.h"
41 #include "fnic_io.h"
42 #include "fnic_fip.h"
43 #include "fnic.h"
44 
45 #define PCI_DEVICE_ID_CISCO_FNIC	0x0045
46 
47 /* Timer to poll notification area for events. Used for MSI interrupts */
48 #define FNIC_NOTIFY_TIMER_PERIOD	(2 * HZ)
49 
50 static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
51 static struct kmem_cache *fnic_io_req_cache;
52 LIST_HEAD(fnic_list);
53 DEFINE_SPINLOCK(fnic_list_lock);
54 
55 /* Supported devices by fnic module */
56 static struct pci_device_id fnic_id_table[] = {
57 	{ PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
58 	{ 0, }
59 };
60 
61 MODULE_DESCRIPTION(DRV_DESCRIPTION);
62 MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
63 	      "Joseph R. Eykholt <jeykholt@cisco.com>");
64 MODULE_LICENSE("GPL v2");
65 MODULE_VERSION(DRV_VERSION);
66 MODULE_DEVICE_TABLE(pci, fnic_id_table);
67 
68 unsigned int fnic_log_level;
69 module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
70 MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");
71 
72 
73 unsigned int io_completions = FNIC_DFLT_IO_COMPLETIONS;
74 module_param(io_completions, int, S_IRUGO|S_IWUSR);
75 MODULE_PARM_DESC(io_completions, "Max CQ entries to process at a time");
76 
77 unsigned int fnic_trace_max_pages = 16;
78 module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR);
79 MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages "
80 					"for fnic trace buffer");
81 
82 unsigned int fnic_fc_trace_max_pages = 64;
83 module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR);
84 MODULE_PARM_DESC(fnic_fc_trace_max_pages,
85 		 "Total allocated memory pages for fc trace buffer");
86 
87 static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH;
88 module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
89 MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");
90 
91 static struct libfc_function_template fnic_transport_template = {
92 	.frame_send = fnic_send,
93 	.lport_set_port_id = fnic_set_port_id,
94 	.fcp_abort_io = fnic_empty_scsi_cleanup,
95 	.fcp_cleanup = fnic_empty_scsi_cleanup,
96 	.exch_mgr_reset = fnic_exch_mgr_reset
97 };
98 
99 static int fnic_slave_alloc(struct scsi_device *sdev)
100 {
101 	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
102 
103 	if (!rport || fc_remote_port_chkready(rport))
104 		return -ENXIO;
105 
106 	scsi_change_queue_depth(sdev, fnic_max_qdepth);
107 	return 0;
108 }
109 
110 static struct scsi_host_template fnic_host_template = {
111 	.module = THIS_MODULE,
112 	.name = DRV_NAME,
113 	.queuecommand = fnic_queuecommand,
114 	.eh_timed_out = fc_eh_timed_out,
115 	.eh_abort_handler = fnic_abort_cmd,
116 	.eh_device_reset_handler = fnic_device_reset,
117 	.eh_host_reset_handler = fnic_host_reset,
118 	.slave_alloc = fnic_slave_alloc,
119 	.change_queue_depth = scsi_change_queue_depth,
120 	.this_id = -1,
121 	.cmd_per_lun = 3,
122 	.can_queue = FNIC_DFLT_IO_REQ,
123 	.sg_tablesize = FNIC_MAX_SG_DESC_CNT,
124 	.max_sectors = 0xffff,
125 	.shost_attrs = fnic_attrs,
126 	.track_queue_depth = 1,
127 };
128 
129 static void
130 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
131 {
132 	if (timeout)
133 		rport->dev_loss_tmo = timeout;
134 	else
135 		rport->dev_loss_tmo = 1;
136 }
137 
138 static void fnic_get_host_speed(struct Scsi_Host *shost);
139 static struct scsi_transport_template *fnic_fc_transport;
140 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
141 static void fnic_reset_host_stats(struct Scsi_Host *);
142 
143 static struct fc_function_template fnic_fc_functions = {
144 
145 	.show_host_node_name = 1,
146 	.show_host_port_name = 1,
147 	.show_host_supported_classes = 1,
148 	.show_host_supported_fc4s = 1,
149 	.show_host_active_fc4s = 1,
150 	.show_host_maxframe_size = 1,
151 	.show_host_port_id = 1,
152 	.show_host_supported_speeds = 1,
153 	.get_host_speed = fnic_get_host_speed,
154 	.show_host_speed = 1,
155 	.show_host_port_type = 1,
156 	.get_host_port_state = fc_get_host_port_state,
157 	.show_host_port_state = 1,
158 	.show_host_symbolic_name = 1,
159 	.show_rport_maxframe_size = 1,
160 	.show_rport_supported_classes = 1,
161 	.show_host_fabric_name = 1,
162 	.show_starget_node_name = 1,
163 	.show_starget_port_name = 1,
164 	.show_starget_port_id = 1,
165 	.show_rport_dev_loss_tmo = 1,
166 	.set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo,
167 	.issue_fc_host_lip = fnic_reset,
168 	.get_fc_host_stats = fnic_get_stats,
169 	.reset_fc_host_stats = fnic_reset_host_stats,
170 	.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
171 	.terminate_rport_io = fnic_terminate_rport_io,
172 	.bsg_request = fc_lport_bsg_request,
173 };
174 
175 static void fnic_get_host_speed(struct Scsi_Host *shost)
176 {
177 	struct fc_lport *lp = shost_priv(shost);
178 	struct fnic *fnic = lport_priv(lp);
179 	u32 port_speed = vnic_dev_port_speed(fnic->vdev);
180 
181 	/* Add in other values as they get defined in fw */
182 	switch (port_speed) {
183 	case DCEM_PORTSPEED_10G:
184 		fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
185 		break;
186 	case DCEM_PORTSPEED_20G:
187 		fc_host_speed(shost) = FC_PORTSPEED_20GBIT;
188 		break;
189 	case DCEM_PORTSPEED_25G:
190 		fc_host_speed(shost) = FC_PORTSPEED_25GBIT;
191 		break;
192 	case DCEM_PORTSPEED_40G:
193 	case DCEM_PORTSPEED_4x10G:
194 		fc_host_speed(shost) = FC_PORTSPEED_40GBIT;
195 		break;
196 	case DCEM_PORTSPEED_100G:
197 		fc_host_speed(shost) = FC_PORTSPEED_100GBIT;
198 		break;
199 	default:
200 		fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
201 		break;
202 	}
203 }
204 
205 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
206 {
207 	int ret;
208 	struct fc_lport *lp = shost_priv(host);
209 	struct fnic *fnic = lport_priv(lp);
210 	struct fc_host_statistics *stats = &lp->host_stats;
211 	struct vnic_stats *vs;
212 	unsigned long flags;
213 
214 	if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
215 		return stats;
216 	fnic->stats_time = jiffies;
217 
218 	spin_lock_irqsave(&fnic->fnic_lock, flags);
219 	ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
220 	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
221 
222 	if (ret) {
223 		FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
224 			      "fnic: Get vnic stats failed"
225 			      " 0x%x", ret);
226 		return stats;
227 	}
228 	vs = fnic->stats;
229 	stats->tx_frames = vs->tx.tx_unicast_frames_ok;
230 	stats->tx_words  = vs->tx.tx_unicast_bytes_ok / 4;
231 	stats->rx_frames = vs->rx.rx_unicast_frames_ok;
232 	stats->rx_words  = vs->rx.rx_unicast_bytes_ok / 4;
233 	stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
234 	stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
235 	stats->invalid_crc_count = vs->rx.rx_crc_errors;
236 	stats->seconds_since_last_reset =
237 			(jiffies - fnic->stats_reset_time) / HZ;
238 	stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
239 	stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
240 
241 	return stats;
242 }
243 
244 /*
245  * fnic_dump_fchost_stats
246  * note : dumps fc_statistics into system logs
247  */
248 void fnic_dump_fchost_stats(struct Scsi_Host *host,
249 				struct fc_host_statistics *stats)
250 {
251 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
252 			"fnic: seconds since last reset = %llu\n",
253 			stats->seconds_since_last_reset);
254 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
255 			"fnic: tx frames		= %llu\n",
256 			stats->tx_frames);
257 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
258 			"fnic: tx words		= %llu\n",
259 			stats->tx_words);
260 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
261 			"fnic: rx frames		= %llu\n",
262 			stats->rx_frames);
263 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
264 			"fnic: rx words		= %llu\n",
265 			stats->rx_words);
266 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
267 			"fnic: lip count		= %llu\n",
268 			stats->lip_count);
269 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
270 			"fnic: nos count		= %llu\n",
271 			stats->nos_count);
272 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
273 			"fnic: error frames		= %llu\n",
274 			stats->error_frames);
275 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
276 			"fnic: dumped frames	= %llu\n",
277 			stats->dumped_frames);
278 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
279 			"fnic: link failure count	= %llu\n",
280 			stats->link_failure_count);
281 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
282 			"fnic: loss of sync count	= %llu\n",
283 			stats->loss_of_sync_count);
284 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
285 			"fnic: loss of signal count	= %llu\n",
286 			stats->loss_of_signal_count);
287 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
288 			"fnic: prim seq protocol err count = %llu\n",
289 			stats->prim_seq_protocol_err_count);
290 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
291 			"fnic: invalid tx word count= %llu\n",
292 			stats->invalid_tx_word_count);
293 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
294 			"fnic: invalid crc count	= %llu\n",
295 			stats->invalid_crc_count);
296 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
297 			"fnic: fcp input requests	= %llu\n",
298 			stats->fcp_input_requests);
299 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
300 			"fnic: fcp output requests	= %llu\n",
301 			stats->fcp_output_requests);
302 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
303 			"fnic: fcp control requests	= %llu\n",
304 			stats->fcp_control_requests);
305 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
306 			"fnic: fcp input megabytes	= %llu\n",
307 			stats->fcp_input_megabytes);
308 	FNIC_MAIN_NOTE(KERN_NOTICE, host,
309 			"fnic: fcp output megabytes	= %llu\n",
310 			stats->fcp_output_megabytes);
311 	return;
312 }
313 
314 /*
315  * fnic_reset_host_stats : clears host stats
316  * note : called when reset_statistics set under sysfs dir
317  */
318 static void fnic_reset_host_stats(struct Scsi_Host *host)
319 {
320 	int ret;
321 	struct fc_lport *lp = shost_priv(host);
322 	struct fnic *fnic = lport_priv(lp);
323 	struct fc_host_statistics *stats;
324 	unsigned long flags;
325 
326 	/* dump current stats, before clearing them */
327 	stats = fnic_get_stats(host);
328 	fnic_dump_fchost_stats(host, stats);
329 
330 	spin_lock_irqsave(&fnic->fnic_lock, flags);
331 	ret = vnic_dev_stats_clear(fnic->vdev);
332 	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
333 
334 	if (ret) {
335 		FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
336 				"fnic: Reset vnic stats failed"
337 				" 0x%x", ret);
338 		return;
339 	}
340 	fnic->stats_reset_time = jiffies;
341 	memset(stats, 0, sizeof(*stats));
342 
343 	return;
344 }
345 
346 void fnic_log_q_error(struct fnic *fnic)
347 {
348 	unsigned int i;
349 	u32 error_status;
350 
351 	for (i = 0; i < fnic->raw_wq_count; i++) {
352 		error_status = ioread32(&fnic->wq[i].ctrl->error_status);
353 		if (error_status)
354 			shost_printk(KERN_ERR, fnic->lport->host,
355 				     "WQ[%d] error_status"
356 				     " %d\n", i, error_status);
357 	}
358 
359 	for (i = 0; i < fnic->rq_count; i++) {
360 		error_status = ioread32(&fnic->rq[i].ctrl->error_status);
361 		if (error_status)
362 			shost_printk(KERN_ERR, fnic->lport->host,
363 				     "RQ[%d] error_status"
364 				     " %d\n", i, error_status);
365 	}
366 
367 	for (i = 0; i < fnic->wq_copy_count; i++) {
368 		error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
369 		if (error_status)
370 			shost_printk(KERN_ERR, fnic->lport->host,
371 				     "CWQ[%d] error_status"
372 				     " %d\n", i, error_status);
373 	}
374 }
375 
376 void fnic_handle_link_event(struct fnic *fnic)
377 {
378 	unsigned long flags;
379 
380 	spin_lock_irqsave(&fnic->fnic_lock, flags);
381 	if (fnic->stop_rx_link_events) {
382 		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
383 		return;
384 	}
385 	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
386 
387 	queue_work(fnic_event_queue, &fnic->link_work);
388 
389 }
390 
391 static int fnic_notify_set(struct fnic *fnic)
392 {
393 	int err;
394 
395 	switch (vnic_dev_get_intr_mode(fnic->vdev)) {
396 	case VNIC_DEV_INTR_MODE_INTX:
397 		err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
398 		break;
399 	case VNIC_DEV_INTR_MODE_MSI:
400 		err = vnic_dev_notify_set(fnic->vdev, -1);
401 		break;
402 	case VNIC_DEV_INTR_MODE_MSIX:
403 		err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
404 		break;
405 	default:
406 		shost_printk(KERN_ERR, fnic->lport->host,
407 			     "Interrupt mode should be set up"
408 			     " before devcmd notify set %d\n",
409 			     vnic_dev_get_intr_mode(fnic->vdev));
410 		err = -1;
411 		break;
412 	}
413 
414 	return err;
415 }
416 
417 static void fnic_notify_timer(struct timer_list *t)
418 {
419 	struct fnic *fnic = from_timer(fnic, t, notify_timer);
420 
421 	fnic_handle_link_event(fnic);
422 	mod_timer(&fnic->notify_timer,
423 		  round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
424 }
425 
426 static void fnic_fip_notify_timer(struct timer_list *t)
427 {
428 	struct fnic *fnic = from_timer(fnic, t, fip_timer);
429 
430 	fnic_handle_fip_timer(fnic);
431 }
432 
433 static void fnic_notify_timer_start(struct fnic *fnic)
434 {
435 	switch (vnic_dev_get_intr_mode(fnic->vdev)) {
436 	case VNIC_DEV_INTR_MODE_MSI:
437 		/*
438 		 * Schedule first timeout immediately. The driver is
439 		 * initiatialized and ready to look for link up notification
440 		 */
441 		mod_timer(&fnic->notify_timer, jiffies);
442 		break;
443 	default:
444 		/* Using intr for notification for INTx/MSI-X */
445 		break;
446 	};
447 }
448 
449 static int fnic_dev_wait(struct vnic_dev *vdev,
450 			 int (*start)(struct vnic_dev *, int),
451 			 int (*finished)(struct vnic_dev *, int *),
452 			 int arg)
453 {
454 	unsigned long time;
455 	int done;
456 	int err;
457 	int count;
458 
459 	count = 0;
460 
461 	err = start(vdev, arg);
462 	if (err)
463 		return err;
464 
465 	/* Wait for func to complete.
466 	* Sometime schedule_timeout_uninterruptible take long time
467 	* to wake up so we do not retry as we are only waiting for
468 	* 2 seconds in while loop. By adding count, we make sure
469 	* we try atleast three times before returning -ETIMEDOUT
470 	*/
471 	time = jiffies + (HZ * 2);
472 	do {
473 		err = finished(vdev, &done);
474 		count++;
475 		if (err)
476 			return err;
477 		if (done)
478 			return 0;
479 		schedule_timeout_uninterruptible(HZ / 10);
480 	} while (time_after(time, jiffies) || (count < 3));
481 
482 	return -ETIMEDOUT;
483 }
484 
485 static int fnic_cleanup(struct fnic *fnic)
486 {
487 	unsigned int i;
488 	int err;
489 
490 	vnic_dev_disable(fnic->vdev);
491 	for (i = 0; i < fnic->intr_count; i++)
492 		vnic_intr_mask(&fnic->intr[i]);
493 
494 	for (i = 0; i < fnic->rq_count; i++) {
495 		err = vnic_rq_disable(&fnic->rq[i]);
496 		if (err)
497 			return err;
498 	}
499 	for (i = 0; i < fnic->raw_wq_count; i++) {
500 		err = vnic_wq_disable(&fnic->wq[i]);
501 		if (err)
502 			return err;
503 	}
504 	for (i = 0; i < fnic->wq_copy_count; i++) {
505 		err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
506 		if (err)
507 			return err;
508 	}
509 
510 	/* Clean up completed IOs and FCS frames */
511 	fnic_wq_copy_cmpl_handler(fnic, io_completions);
512 	fnic_wq_cmpl_handler(fnic, -1);
513 	fnic_rq_cmpl_handler(fnic, -1);
514 
515 	/* Clean up the IOs and FCS frames that have not completed */
516 	for (i = 0; i < fnic->raw_wq_count; i++)
517 		vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
518 	for (i = 0; i < fnic->rq_count; i++)
519 		vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
520 	for (i = 0; i < fnic->wq_copy_count; i++)
521 		vnic_wq_copy_clean(&fnic->wq_copy[i],
522 				   fnic_wq_copy_cleanup_handler);
523 
524 	for (i = 0; i < fnic->cq_count; i++)
525 		vnic_cq_clean(&fnic->cq[i]);
526 	for (i = 0; i < fnic->intr_count; i++)
527 		vnic_intr_clean(&fnic->intr[i]);
528 
529 	mempool_destroy(fnic->io_req_pool);
530 	for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
531 		mempool_destroy(fnic->io_sgl_pool[i]);
532 
533 	return 0;
534 }
535 
536 static void fnic_iounmap(struct fnic *fnic)
537 {
538 	if (fnic->bar0.vaddr)
539 		iounmap(fnic->bar0.vaddr);
540 }
541 
542 /**
543  * fnic_get_mac() - get assigned data MAC address for FIP code.
544  * @lport: 	local port.
545  */
546 static u8 *fnic_get_mac(struct fc_lport *lport)
547 {
548 	struct fnic *fnic = lport_priv(lport);
549 
550 	return fnic->data_src_addr;
551 }
552 
553 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)
554 {
555 	u16 old_vlan;
556 	old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id);
557 }
558 
559 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
560 {
561 	struct Scsi_Host *host;
562 	struct fc_lport *lp;
563 	struct fnic *fnic;
564 	mempool_t *pool;
565 	int err;
566 	int i;
567 	unsigned long flags;
568 
569 	/*
570 	 * Allocate SCSI Host and set up association between host,
571 	 * local port, and fnic
572 	 */
573 	lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));
574 	if (!lp) {
575 		printk(KERN_ERR PFX "Unable to alloc libfc local port\n");
576 		err = -ENOMEM;
577 		goto err_out;
578 	}
579 	host = lp->host;
580 	fnic = lport_priv(lp);
581 	fnic->lport = lp;
582 	fnic->ctlr.lp = lp;
583 
584 	snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
585 		 host->host_no);
586 
587 	host->transportt = fnic_fc_transport;
588 
589 	fnic_stats_debugfs_init(fnic);
590 
591 	/* Setup PCI resources */
592 	pci_set_drvdata(pdev, fnic);
593 
594 	fnic->pdev = pdev;
595 
596 	err = pci_enable_device(pdev);
597 	if (err) {
598 		shost_printk(KERN_ERR, fnic->lport->host,
599 			     "Cannot enable PCI device, aborting.\n");
600 		goto err_out_free_hba;
601 	}
602 
603 	err = pci_request_regions(pdev, DRV_NAME);
604 	if (err) {
605 		shost_printk(KERN_ERR, fnic->lport->host,
606 			     "Cannot enable PCI resources, aborting\n");
607 		goto err_out_disable_device;
608 	}
609 
610 	pci_set_master(pdev);
611 
612 	/* Query PCI controller on system for DMA addressing
613 	 * limitation for the device.  Try 64-bit first, and
614 	 * fail to 32-bit.
615 	 */
616 	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
617 	if (err) {
618 		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
619 		if (err) {
620 			shost_printk(KERN_ERR, fnic->lport->host,
621 				     "No usable DMA configuration "
622 				     "aborting\n");
623 			goto err_out_release_regions;
624 		}
625 	}
626 
627 	/* Map vNIC resources from BAR0 */
628 	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
629 		shost_printk(KERN_ERR, fnic->lport->host,
630 			     "BAR0 not memory-map'able, aborting.\n");
631 		err = -ENODEV;
632 		goto err_out_release_regions;
633 	}
634 
635 	fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
636 	fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
637 	fnic->bar0.len = pci_resource_len(pdev, 0);
638 
639 	if (!fnic->bar0.vaddr) {
640 		shost_printk(KERN_ERR, fnic->lport->host,
641 			     "Cannot memory-map BAR0 res hdr, "
642 			     "aborting.\n");
643 		err = -ENODEV;
644 		goto err_out_release_regions;
645 	}
646 
647 	fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
648 	if (!fnic->vdev) {
649 		shost_printk(KERN_ERR, fnic->lport->host,
650 			     "vNIC registration failed, "
651 			     "aborting.\n");
652 		err = -ENODEV;
653 		goto err_out_iounmap;
654 	}
655 
656 	err = vnic_dev_cmd_init(fnic->vdev);
657 	if (err) {
658 		shost_printk(KERN_ERR, fnic->lport->host,
659 				"vnic_dev_cmd_init() returns %d, aborting\n",
660 				err);
661 		goto err_out_vnic_unregister;
662 	}
663 
664 	err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
665 			    vnic_dev_open_done, CMD_OPENF_RQ_ENABLE_THEN_POST);
666 	if (err) {
667 		shost_printk(KERN_ERR, fnic->lport->host,
668 			     "vNIC dev open failed, aborting.\n");
669 		goto err_out_dev_cmd_deinit;
670 	}
671 
672 	err = vnic_dev_init(fnic->vdev, 0);
673 	if (err) {
674 		shost_printk(KERN_ERR, fnic->lport->host,
675 			     "vNIC dev init failed, aborting.\n");
676 		goto err_out_dev_close;
677 	}
678 
679 	err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
680 	if (err) {
681 		shost_printk(KERN_ERR, fnic->lport->host,
682 			     "vNIC get MAC addr failed \n");
683 		goto err_out_dev_close;
684 	}
685 	/* set data_src for point-to-point mode and to keep it non-zero */
686 	memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN);
687 
688 	/* Get vNIC configuration */
689 	err = fnic_get_vnic_config(fnic);
690 	if (err) {
691 		shost_printk(KERN_ERR, fnic->lport->host,
692 			     "Get vNIC configuration failed, "
693 			     "aborting.\n");
694 		goto err_out_dev_close;
695 	}
696 
697 	/* Configure Maximum Outstanding IO reqs*/
698 	if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) {
699 		host->can_queue = min_t(u32, FNIC_MAX_IO_REQ,
700 					max_t(u32, FNIC_MIN_IO_REQ,
701 					fnic->config.io_throttle_count));
702 	}
703 	fnic->fnic_max_tag_id = host->can_queue;
704 
705 	host->max_lun = fnic->config.luns_per_tgt;
706 	host->max_id = FNIC_MAX_FCP_TARGET;
707 	host->max_cmd_len = FCOE_MAX_CMD_LEN;
708 
709 	fnic_get_res_counts(fnic);
710 
711 	err = fnic_set_intr_mode(fnic);
712 	if (err) {
713 		shost_printk(KERN_ERR, fnic->lport->host,
714 			     "Failed to set intr mode, "
715 			     "aborting.\n");
716 		goto err_out_dev_close;
717 	}
718 
719 	err = fnic_alloc_vnic_resources(fnic);
720 	if (err) {
721 		shost_printk(KERN_ERR, fnic->lport->host,
722 			     "Failed to alloc vNIC resources, "
723 			     "aborting.\n");
724 		goto err_out_clear_intr;
725 	}
726 
727 
728 	/* initialize all fnic locks */
729 	spin_lock_init(&fnic->fnic_lock);
730 
731 	for (i = 0; i < FNIC_WQ_MAX; i++)
732 		spin_lock_init(&fnic->wq_lock[i]);
733 
734 	for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
735 		spin_lock_init(&fnic->wq_copy_lock[i]);
736 		fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
737 		fnic->fw_ack_recd[i] = 0;
738 		fnic->fw_ack_index[i] = -1;
739 	}
740 
741 	for (i = 0; i < FNIC_IO_LOCKS; i++)
742 		spin_lock_init(&fnic->io_req_lock[i]);
743 
744 	fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
745 	if (!fnic->io_req_pool)
746 		goto err_out_free_resources;
747 
748 	pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
749 	if (!pool)
750 		goto err_out_free_ioreq_pool;
751 	fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
752 
753 	pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
754 	if (!pool)
755 		goto err_out_free_dflt_pool;
756 	fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
757 
758 	/* setup vlan config, hw inserts vlan header */
759 	fnic->vlan_hw_insert = 1;
760 	fnic->vlan_id = 0;
761 
762 	/* Initialize the FIP fcoe_ctrl struct */
763 	fnic->ctlr.send = fnic_eth_send;
764 	fnic->ctlr.update_mac = fnic_update_mac;
765 	fnic->ctlr.get_src_addr = fnic_get_mac;
766 	if (fnic->config.flags & VFCF_FIP_CAPABLE) {
767 		shost_printk(KERN_INFO, fnic->lport->host,
768 			     "firmware supports FIP\n");
769 		/* enable directed and multicast */
770 		vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
771 		vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
772 		vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
773 		fnic->set_vlan = fnic_set_vlan;
774 		fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);
775 		timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0);
776 		spin_lock_init(&fnic->vlans_lock);
777 		INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);
778 		INIT_WORK(&fnic->event_work, fnic_handle_event);
779 		skb_queue_head_init(&fnic->fip_frame_queue);
780 		INIT_LIST_HEAD(&fnic->evlist);
781 		INIT_LIST_HEAD(&fnic->vlans);
782 	} else {
783 		shost_printk(KERN_INFO, fnic->lport->host,
784 			     "firmware uses non-FIP mode\n");
785 		fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);
786 		fnic->ctlr.state = FIP_ST_NON_FIP;
787 	}
788 	fnic->state = FNIC_IN_FC_MODE;
789 
790 	atomic_set(&fnic->in_flight, 0);
791 	fnic->state_flags = FNIC_FLAGS_NONE;
792 
793 	/* Enable hardware stripping of vlan header on ingress */
794 	fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
795 
796 	/* Setup notification buffer area */
797 	err = fnic_notify_set(fnic);
798 	if (err) {
799 		shost_printk(KERN_ERR, fnic->lport->host,
800 			     "Failed to alloc notify buffer, aborting.\n");
801 		goto err_out_free_max_pool;
802 	}
803 
804 	/* Setup notify timer when using MSI interrupts */
805 	if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
806 		timer_setup(&fnic->notify_timer, fnic_notify_timer, 0);
807 
808 	/* allocate RQ buffers and post them to RQ*/
809 	for (i = 0; i < fnic->rq_count; i++) {
810 		vnic_rq_enable(&fnic->rq[i]);
811 		err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
812 		if (err) {
813 			shost_printk(KERN_ERR, fnic->lport->host,
814 				     "fnic_alloc_rq_frame can't alloc "
815 				     "frame\n");
816 			goto err_out_free_rq_buf;
817 		}
818 	}
819 
820 	/*
821 	 * Initialization done with PCI system, hardware, firmware.
822 	 * Add host to SCSI
823 	 */
824 	err = scsi_add_host(lp->host, &pdev->dev);
825 	if (err) {
826 		shost_printk(KERN_ERR, fnic->lport->host,
827 			     "fnic: scsi_add_host failed...exiting\n");
828 		goto err_out_free_rq_buf;
829 	}
830 
831 	/* Start local port initiatialization */
832 
833 	lp->link_up = 0;
834 
835 	lp->max_retry_count = fnic->config.flogi_retries;
836 	lp->max_rport_retry_count = fnic->config.plogi_retries;
837 	lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
838 			      FCP_SPPF_CONF_COMPL);
839 	if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
840 		lp->service_params |= FCP_SPPF_RETRY;
841 
842 	lp->boot_time = jiffies;
843 	lp->e_d_tov = fnic->config.ed_tov;
844 	lp->r_a_tov = fnic->config.ra_tov;
845 	lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
846 	fc_set_wwnn(lp, fnic->config.node_wwn);
847 	fc_set_wwpn(lp, fnic->config.port_wwn);
848 
849 	fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0);
850 
851 	if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
852 			       FCPIO_HOST_EXCH_RANGE_END, NULL)) {
853 		err = -ENOMEM;
854 		goto err_out_remove_scsi_host;
855 	}
856 
857 	fc_lport_init_stats(lp);
858 	fnic->stats_reset_time = jiffies;
859 
860 	fc_lport_config(lp);
861 
862 	if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
863 		       sizeof(struct fc_frame_header))) {
864 		err = -EINVAL;
865 		goto err_out_free_exch_mgr;
866 	}
867 	fc_host_maxframe_size(lp->host) = lp->mfs;
868 	fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000;
869 
870 	sprintf(fc_host_symbolic_name(lp->host),
871 		DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
872 
873 	spin_lock_irqsave(&fnic_list_lock, flags);
874 	list_add_tail(&fnic->list, &fnic_list);
875 	spin_unlock_irqrestore(&fnic_list_lock, flags);
876 
877 	INIT_WORK(&fnic->link_work, fnic_handle_link);
878 	INIT_WORK(&fnic->frame_work, fnic_handle_frame);
879 	skb_queue_head_init(&fnic->frame_queue);
880 	skb_queue_head_init(&fnic->tx_queue);
881 
882 	/* Enable all queues */
883 	for (i = 0; i < fnic->raw_wq_count; i++)
884 		vnic_wq_enable(&fnic->wq[i]);
885 	for (i = 0; i < fnic->wq_copy_count; i++)
886 		vnic_wq_copy_enable(&fnic->wq_copy[i]);
887 
888 	fc_fabric_login(lp);
889 
890 	err = fnic_request_intr(fnic);
891 	if (err) {
892 		shost_printk(KERN_ERR, fnic->lport->host,
893 			     "Unable to request irq.\n");
894 		goto err_out_free_exch_mgr;
895 	}
896 
897 	vnic_dev_enable(fnic->vdev);
898 
899 	for (i = 0; i < fnic->intr_count; i++)
900 		vnic_intr_unmask(&fnic->intr[i]);
901 
902 	fnic_notify_timer_start(fnic);
903 
904 	return 0;
905 
906 err_out_free_exch_mgr:
907 	fc_exch_mgr_free(lp);
908 err_out_remove_scsi_host:
909 	fc_remove_host(lp->host);
910 	scsi_remove_host(lp->host);
911 err_out_free_rq_buf:
912 	for (i = 0; i < fnic->rq_count; i++)
913 		vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
914 	vnic_dev_notify_unset(fnic->vdev);
915 err_out_free_max_pool:
916 	mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
917 err_out_free_dflt_pool:
918 	mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
919 err_out_free_ioreq_pool:
920 	mempool_destroy(fnic->io_req_pool);
921 err_out_free_resources:
922 	fnic_free_vnic_resources(fnic);
923 err_out_clear_intr:
924 	fnic_clear_intr_mode(fnic);
925 err_out_dev_close:
926 	vnic_dev_close(fnic->vdev);
927 err_out_dev_cmd_deinit:
928 err_out_vnic_unregister:
929 	vnic_dev_unregister(fnic->vdev);
930 err_out_iounmap:
931 	fnic_iounmap(fnic);
932 err_out_release_regions:
933 	pci_release_regions(pdev);
934 err_out_disable_device:
935 	pci_disable_device(pdev);
936 err_out_free_hba:
937 	fnic_stats_debugfs_remove(fnic);
938 	scsi_host_put(lp->host);
939 err_out:
940 	return err;
941 }
942 
943 static void fnic_remove(struct pci_dev *pdev)
944 {
945 	struct fnic *fnic = pci_get_drvdata(pdev);
946 	struct fc_lport *lp = fnic->lport;
947 	unsigned long flags;
948 
949 	/*
950 	 * Mark state so that the workqueue thread stops forwarding
951 	 * received frames and link events to the local port. ISR and
952 	 * other threads that can queue work items will also stop
953 	 * creating work items on the fnic workqueue
954 	 */
955 	spin_lock_irqsave(&fnic->fnic_lock, flags);
956 	fnic->stop_rx_link_events = 1;
957 	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
958 
959 	if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
960 		del_timer_sync(&fnic->notify_timer);
961 
962 	/*
963 	 * Flush the fnic event queue. After this call, there should
964 	 * be no event queued for this fnic device in the workqueue
965 	 */
966 	flush_workqueue(fnic_event_queue);
967 	skb_queue_purge(&fnic->frame_queue);
968 	skb_queue_purge(&fnic->tx_queue);
969 
970 	if (fnic->config.flags & VFCF_FIP_CAPABLE) {
971 		del_timer_sync(&fnic->fip_timer);
972 		skb_queue_purge(&fnic->fip_frame_queue);
973 		fnic_fcoe_reset_vlans(fnic);
974 		fnic_fcoe_evlist_free(fnic);
975 	}
976 
977 	/*
978 	 * Log off the fabric. This stops all remote ports, dns port,
979 	 * logs off the fabric. This flushes all rport, disc, lport work
980 	 * before returning
981 	 */
982 	fc_fabric_logoff(fnic->lport);
983 
984 	spin_lock_irqsave(&fnic->fnic_lock, flags);
985 	fnic->in_remove = 1;
986 	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
987 
988 	fcoe_ctlr_destroy(&fnic->ctlr);
989 	fc_lport_destroy(lp);
990 	fnic_stats_debugfs_remove(fnic);
991 
992 	/*
993 	 * This stops the fnic device, masks all interrupts. Completed
994 	 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
995 	 * cleaned up
996 	 */
997 	fnic_cleanup(fnic);
998 
999 	BUG_ON(!skb_queue_empty(&fnic->frame_queue));
1000 	BUG_ON(!skb_queue_empty(&fnic->tx_queue));
1001 
1002 	spin_lock_irqsave(&fnic_list_lock, flags);
1003 	list_del(&fnic->list);
1004 	spin_unlock_irqrestore(&fnic_list_lock, flags);
1005 
1006 	fc_remove_host(fnic->lport->host);
1007 	scsi_remove_host(fnic->lport->host);
1008 	fc_exch_mgr_free(fnic->lport);
1009 	vnic_dev_notify_unset(fnic->vdev);
1010 	fnic_free_intr(fnic);
1011 	fnic_free_vnic_resources(fnic);
1012 	fnic_clear_intr_mode(fnic);
1013 	vnic_dev_close(fnic->vdev);
1014 	vnic_dev_unregister(fnic->vdev);
1015 	fnic_iounmap(fnic);
1016 	pci_release_regions(pdev);
1017 	pci_disable_device(pdev);
1018 	scsi_host_put(lp->host);
1019 }
1020 
1021 static struct pci_driver fnic_driver = {
1022 	.name = DRV_NAME,
1023 	.id_table = fnic_id_table,
1024 	.probe = fnic_probe,
1025 	.remove = fnic_remove,
1026 };
1027 
1028 static int __init fnic_init_module(void)
1029 {
1030 	size_t len;
1031 	int err = 0;
1032 
1033 	printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1034 
1035 	/* Create debugfs entries for fnic */
1036 	err = fnic_debugfs_init();
1037 	if (err < 0) {
1038 		printk(KERN_ERR PFX "Failed to create fnic directory "
1039 				"for tracing and stats logging\n");
1040 		fnic_debugfs_terminate();
1041 	}
1042 
1043 	/* Allocate memory for trace buffer */
1044 	err = fnic_trace_buf_init();
1045 	if (err < 0) {
1046 		printk(KERN_ERR PFX
1047 		       "Trace buffer initialization Failed. "
1048 		       "Fnic Tracing utility is disabled\n");
1049 		fnic_trace_free();
1050 	}
1051 
1052     /* Allocate memory for fc trace buffer */
1053 	err = fnic_fc_trace_init();
1054 	if (err < 0) {
1055 		printk(KERN_ERR PFX "FC trace buffer initialization Failed "
1056 		       "FC frame tracing utility is disabled\n");
1057 		fnic_fc_trace_free();
1058 	}
1059 
1060 	/* Create a cache for allocation of default size sgls */
1061 	len = sizeof(struct fnic_dflt_sgl_list);
1062 	fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
1063 		("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1064 		 SLAB_HWCACHE_ALIGN,
1065 		 NULL);
1066 	if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
1067 		printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
1068 		err = -ENOMEM;
1069 		goto err_create_fnic_sgl_slab_dflt;
1070 	}
1071 
1072 	/* Create a cache for allocation of max size sgls*/
1073 	len = sizeof(struct fnic_sgl_list);
1074 	fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
1075 		("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1076 		  SLAB_HWCACHE_ALIGN,
1077 		  NULL);
1078 	if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
1079 		printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
1080 		err = -ENOMEM;
1081 		goto err_create_fnic_sgl_slab_max;
1082 	}
1083 
1084 	/* Create a cache of io_req structs for use via mempool */
1085 	fnic_io_req_cache = kmem_cache_create("fnic_io_req",
1086 					      sizeof(struct fnic_io_req),
1087 					      0, SLAB_HWCACHE_ALIGN, NULL);
1088 	if (!fnic_io_req_cache) {
1089 		printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
1090 		err = -ENOMEM;
1091 		goto err_create_fnic_ioreq_slab;
1092 	}
1093 
1094 	fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
1095 	if (!fnic_event_queue) {
1096 		printk(KERN_ERR PFX "fnic work queue create failed\n");
1097 		err = -ENOMEM;
1098 		goto err_create_fnic_workq;
1099 	}
1100 
1101 	spin_lock_init(&fnic_list_lock);
1102 	INIT_LIST_HEAD(&fnic_list);
1103 
1104 	fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q");
1105 	if (!fnic_fip_queue) {
1106 		printk(KERN_ERR PFX "fnic FIP work queue create failed\n");
1107 		err = -ENOMEM;
1108 		goto err_create_fip_workq;
1109 	}
1110 
1111 	fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
1112 	if (!fnic_fc_transport) {
1113 		printk(KERN_ERR PFX "fc_attach_transport error\n");
1114 		err = -ENOMEM;
1115 		goto err_fc_transport;
1116 	}
1117 
1118 	/* register the driver with PCI system */
1119 	err = pci_register_driver(&fnic_driver);
1120 	if (err < 0) {
1121 		printk(KERN_ERR PFX "pci register error\n");
1122 		goto err_pci_register;
1123 	}
1124 	return err;
1125 
1126 err_pci_register:
1127 	fc_release_transport(fnic_fc_transport);
1128 err_fc_transport:
1129 	destroy_workqueue(fnic_fip_queue);
1130 err_create_fip_workq:
1131 	destroy_workqueue(fnic_event_queue);
1132 err_create_fnic_workq:
1133 	kmem_cache_destroy(fnic_io_req_cache);
1134 err_create_fnic_ioreq_slab:
1135 	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1136 err_create_fnic_sgl_slab_max:
1137 	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1138 err_create_fnic_sgl_slab_dflt:
1139 	fnic_trace_free();
1140 	fnic_fc_trace_free();
1141 	fnic_debugfs_terminate();
1142 	return err;
1143 }
1144 
1145 static void __exit fnic_cleanup_module(void)
1146 {
1147 	pci_unregister_driver(&fnic_driver);
1148 	destroy_workqueue(fnic_event_queue);
1149 	if (fnic_fip_queue) {
1150 		flush_workqueue(fnic_fip_queue);
1151 		destroy_workqueue(fnic_fip_queue);
1152 	}
1153 	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1154 	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1155 	kmem_cache_destroy(fnic_io_req_cache);
1156 	fc_release_transport(fnic_fc_transport);
1157 	fnic_trace_free();
1158 	fnic_fc_trace_free();
1159 	fnic_debugfs_terminate();
1160 }
1161 
1162 module_init(fnic_init_module);
1163 module_exit(fnic_cleanup_module);
1164 
1165