Free Electrons

Embedded Linux Experts

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#include <linux/module.h>
#include <linux/mempool.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/skbuff.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/scsi_tcq.h>
#include <scsi/libfc.h>
#include <scsi/fc_frame.h>

#include "vnic_dev.h"
#include "vnic_intr.h"
#include "vnic_stats.h"
#include "fnic_io.h"
#include "fnic.h"

#define PCI_DEVICE_ID_CISCO_FNIC	0x0045

/* Timer to poll notification area for events. Used for MSI interrupts */
#define FNIC_NOTIFY_TIMER_PERIOD	(2 * HZ)

static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
static struct kmem_cache *fnic_io_req_cache;
LIST_HEAD(fnic_list);
DEFINE_SPINLOCK(fnic_list_lock);

/* Supported devices by fnic module */
static struct pci_device_id fnic_id_table[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
	{ 0, }
};

MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
	      "Joseph R. Eykholt <jeykholt@cisco.com>");
MODULE_LICENSE("GPL v2");
MODULE_VERSION(DRV_VERSION);
MODULE_DEVICE_TABLE(pci, fnic_id_table);

unsigned int fnic_log_level;
module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");


static struct libfc_function_template fnic_transport_template = {
	.frame_send = fnic_send,
	.fcp_abort_io = fnic_empty_scsi_cleanup,
	.fcp_cleanup = fnic_empty_scsi_cleanup,
	.exch_mgr_reset = fnic_exch_mgr_reset
};

static int fnic_slave_alloc(struct scsi_device *sdev)
{
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
	struct fc_lport *lp = shost_priv(sdev->host);
	struct fnic *fnic = lport_priv(lp);

	sdev->tagged_supported = 1;

	if (!rport || fc_remote_port_chkready(rport))
		return -ENXIO;

	scsi_activate_tcq(sdev, FNIC_DFLT_QUEUE_DEPTH);
	rport->dev_loss_tmo = fnic->config.port_down_timeout / 1000;

	return 0;
}

static struct scsi_host_template fnic_host_template = {
	.module = THIS_MODULE,
	.name = DRV_NAME,
	.queuecommand = fnic_queuecommand,
	.eh_abort_handler = fnic_abort_cmd,
	.eh_device_reset_handler = fnic_device_reset,
	.eh_host_reset_handler = fnic_host_reset,
	.slave_alloc = fnic_slave_alloc,
	.change_queue_depth = fc_change_queue_depth,
	.change_queue_type = fc_change_queue_type,
	.this_id = -1,
	.cmd_per_lun = 3,
	.can_queue = FNIC_MAX_IO_REQ,
	.use_clustering = ENABLE_CLUSTERING,
	.sg_tablesize = FNIC_MAX_SG_DESC_CNT,
	.max_sectors = 0xffff,
	.shost_attrs = fnic_attrs,
};

static void fnic_get_host_speed(struct Scsi_Host *shost);
static struct scsi_transport_template *fnic_fc_transport;
static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);

static struct fc_function_template fnic_fc_functions = {

	.show_host_node_name = 1,
	.show_host_port_name = 1,
	.show_host_supported_classes = 1,
	.show_host_supported_fc4s = 1,
	.show_host_active_fc4s = 1,
	.show_host_maxframe_size = 1,
	.show_host_port_id = 1,
	.show_host_supported_speeds = 1,
	.get_host_speed = fnic_get_host_speed,
	.show_host_speed = 1,
	.show_host_port_type = 1,
	.get_host_port_state = fc_get_host_port_state,
	.show_host_port_state = 1,
	.show_host_symbolic_name = 1,
	.show_rport_maxframe_size = 1,
	.show_rport_supported_classes = 1,
	.show_host_fabric_name = 1,
	.show_starget_node_name = 1,
	.show_starget_port_name = 1,
	.show_starget_port_id = 1,
	.show_rport_dev_loss_tmo = 1,
	.issue_fc_host_lip = fnic_reset,
	.get_fc_host_stats = fnic_get_stats,
	.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
	.terminate_rport_io = fnic_terminate_rport_io,
};

static void fnic_get_host_speed(struct Scsi_Host *shost)
{
	struct fc_lport *lp = shost_priv(shost);
	struct fnic *fnic = lport_priv(lp);
	u32 port_speed = vnic_dev_port_speed(fnic->vdev);

	/* Add in other values as they get defined in fw */
	switch (port_speed) {
	case 10000:
		fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
		break;
	default:
		fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
		break;
	}
}

static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
{
	int ret;
	struct fc_lport *lp = shost_priv(host);
	struct fnic *fnic = lport_priv(lp);
	struct fc_host_statistics *stats = &lp->host_stats;
	struct vnic_stats *vs;
	unsigned long flags;

	if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
		return stats;
	fnic->stats_time = jiffies;

	spin_lock_irqsave(&fnic->fnic_lock, flags);
	ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);

	if (ret) {
		FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
			      "fnic: Get vnic stats failed"
			      " 0x%x", ret);
		return stats;
	}
	vs = fnic->stats;
	stats->tx_frames = vs->tx.tx_unicast_frames_ok;
	stats->tx_words  = vs->tx.tx_unicast_bytes_ok / 4;
	stats->rx_frames = vs->rx.rx_unicast_frames_ok;
	stats->rx_words  = vs->rx.rx_unicast_bytes_ok / 4;
	stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
	stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
	stats->invalid_crc_count = vs->rx.rx_crc_errors;
	stats->seconds_since_last_reset = (jiffies - lp->boot_time) / HZ;
	stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
	stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);

	return stats;
}

void fnic_log_q_error(struct fnic *fnic)
{
	unsigned int i;
	u32 error_status;

	for (i = 0; i < fnic->raw_wq_count; i++) {
		error_status = ioread32(&fnic->wq[i].ctrl->error_status);
		if (error_status)
			shost_printk(KERN_ERR, fnic->lport->host,
				     "WQ[%d] error_status"
				     " %d\n", i, error_status);
	}

	for (i = 0; i < fnic->rq_count; i++) {
		error_status = ioread32(&fnic->rq[i].ctrl->error_status);
		if (error_status)
			shost_printk(KERN_ERR, fnic->lport->host,
				     "RQ[%d] error_status"
				     " %d\n", i, error_status);
	}

	for (i = 0; i < fnic->wq_copy_count; i++) {
		error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
		if (error_status)
			shost_printk(KERN_ERR, fnic->lport->host,
				     "CWQ[%d] error_status"
				     " %d\n", i, error_status);
	}
}

void fnic_handle_link_event(struct fnic *fnic)
{
	unsigned long flags;

	spin_lock_irqsave(&fnic->fnic_lock, flags);
	if (fnic->stop_rx_link_events) {
		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
		return;
	}
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);

	queue_work(fnic_event_queue, &fnic->link_work);

}

static int fnic_notify_set(struct fnic *fnic)
{
	int err;

	switch (vnic_dev_get_intr_mode(fnic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
		err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
		break;
	case VNIC_DEV_INTR_MODE_MSI:
		err = vnic_dev_notify_set(fnic->vdev, -1);
		break;
	case VNIC_DEV_INTR_MODE_MSIX:
		err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
		break;
	default:
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Interrupt mode should be set up"
			     " before devcmd notify set %d\n",
			     vnic_dev_get_intr_mode(fnic->vdev));
		err = -1;
		break;
	}

	return err;
}

static void fnic_notify_timer(unsigned long data)
{
	struct fnic *fnic = (struct fnic *)data;

	fnic_handle_link_event(fnic);
	mod_timer(&fnic->notify_timer,
		  round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
}

static void fnic_notify_timer_start(struct fnic *fnic)
{
	switch (vnic_dev_get_intr_mode(fnic->vdev)) {
	case VNIC_DEV_INTR_MODE_MSI:
		/*
		 * Schedule first timeout immediately. The driver is
		 * initiatialized and ready to look for link up notification
		 */
		mod_timer(&fnic->notify_timer, jiffies);
		break;
	default:
		/* Using intr for notification for INTx/MSI-X */
		break;
	};
}

static int fnic_dev_wait(struct vnic_dev *vdev,
			 int (*start)(struct vnic_dev *, int),
			 int (*finished)(struct vnic_dev *, int *),
			 int arg)
{
	unsigned long time;
	int done;
	int err;

	err = start(vdev, arg);
	if (err)
		return err;

	/* Wait for func to complete...2 seconds max */
	time = jiffies + (HZ * 2);
	do {
		err = finished(vdev, &done);
		if (err)
			return err;
		if (done)
			return 0;
		schedule_timeout_uninterruptible(HZ / 10);
	} while (time_after(time, jiffies));

	return -ETIMEDOUT;
}

static int fnic_cleanup(struct fnic *fnic)
{
	unsigned int i;
	int err;
	unsigned long flags;
	struct fc_frame *flogi = NULL;
	struct fc_frame *flogi_resp = NULL;

	vnic_dev_disable(fnic->vdev);
	for (i = 0; i < fnic->intr_count; i++)
		vnic_intr_mask(&fnic->intr[i]);

	for (i = 0; i < fnic->rq_count; i++) {
		err = vnic_rq_disable(&fnic->rq[i]);
		if (err)
			return err;
	}
	for (i = 0; i < fnic->raw_wq_count; i++) {
		err = vnic_wq_disable(&fnic->wq[i]);
		if (err)
			return err;
	}
	for (i = 0; i < fnic->wq_copy_count; i++) {
		err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
		if (err)
			return err;
	}

	/* Clean up completed IOs and FCS frames */
	fnic_wq_copy_cmpl_handler(fnic, -1);
	fnic_wq_cmpl_handler(fnic, -1);
	fnic_rq_cmpl_handler(fnic, -1);

	/* Clean up the IOs and FCS frames that have not completed */
	for (i = 0; i < fnic->raw_wq_count; i++)
		vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
	for (i = 0; i < fnic->rq_count; i++)
		vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
	for (i = 0; i < fnic->wq_copy_count; i++)
		vnic_wq_copy_clean(&fnic->wq_copy[i],
				   fnic_wq_copy_cleanup_handler);

	for (i = 0; i < fnic->cq_count; i++)
		vnic_cq_clean(&fnic->cq[i]);
	for (i = 0; i < fnic->intr_count; i++)
		vnic_intr_clean(&fnic->intr[i]);

	/*
	 * Remove cached flogi and flogi resp frames if any
	 * These frames are not in any queue, and therefore queue
	 * cleanup does not clean them. So clean them explicitly
	 */
	spin_lock_irqsave(&fnic->fnic_lock, flags);
	flogi = fnic->flogi;
	fnic->flogi = NULL;
	flogi_resp = fnic->flogi_resp;
	fnic->flogi_resp = NULL;
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);

	if (flogi)
		dev_kfree_skb(fp_skb(flogi));

	if (flogi_resp)
		dev_kfree_skb(fp_skb(flogi_resp));

	mempool_destroy(fnic->io_req_pool);
	for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
		mempool_destroy(fnic->io_sgl_pool[i]);

	return 0;
}

static void fnic_iounmap(struct fnic *fnic)
{
	if (fnic->bar0.vaddr)
		iounmap(fnic->bar0.vaddr);
}

/*
 * Allocate element for mempools requiring GFP_DMA flag.
 * Otherwise, checks in kmem_flagcheck() hit BUG_ON().
 */
static void *fnic_alloc_slab_dma(gfp_t gfp_mask, void *pool_data)
{
	struct kmem_cache *mem = pool_data;

	return kmem_cache_alloc(mem, gfp_mask | GFP_ATOMIC | GFP_DMA);
}

static int __devinit fnic_probe(struct pci_dev *pdev,
				const struct pci_device_id *ent)
{
	struct Scsi_Host *host;
	struct fc_lport *lp;
	struct fnic *fnic;
	mempool_t *pool;
	int err;
	int i;
	unsigned long flags;

	/*
	 * Allocate SCSI Host and set up association between host,
	 * local port, and fnic
	 */
	host = scsi_host_alloc(&fnic_host_template,
			       sizeof(struct fc_lport) + sizeof(struct fnic));
	if (!host) {
		printk(KERN_ERR PFX "Unable to alloc SCSI host\n");
		err = -ENOMEM;
		goto err_out;
	}
	lp = shost_priv(host);
	lp->host = host;
	fnic = lport_priv(lp);
	fnic->lport = lp;

	snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
		 host->host_no);

	host->transportt = fnic_fc_transport;

	err = scsi_init_shared_tag_map(host, FNIC_MAX_IO_REQ);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Unable to alloc shared tag map\n");
		goto err_out_free_hba;
	}

	/* Setup PCI resources */
	pci_set_drvdata(pdev, fnic);

	fnic->pdev = pdev;

	err = pci_enable_device(pdev);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Cannot enable PCI device, aborting.\n");
		goto err_out_free_hba;
	}

	err = pci_request_regions(pdev, DRV_NAME);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Cannot enable PCI resources, aborting\n");
		goto err_out_disable_device;
	}

	pci_set_master(pdev);

	/* Query PCI controller on system for DMA addressing
	 * limitation for the device.  Try 40-bit first, and
	 * fail to 32-bit.
	 */
	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
	if (err) {
		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
		if (err) {
			shost_printk(KERN_ERR, fnic->lport->host,
				     "No usable DMA configuration "
				     "aborting\n");
			goto err_out_release_regions;
		}
		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
		if (err) {
			shost_printk(KERN_ERR, fnic->lport->host,
				     "Unable to obtain 32-bit DMA "
				     "for consistent allocations, aborting.\n");
			goto err_out_release_regions;
		}
	} else {
		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
		if (err) {
			shost_printk(KERN_ERR, fnic->lport->host,
				     "Unable to obtain 40-bit DMA "
				     "for consistent allocations, aborting.\n");
			goto err_out_release_regions;
		}
	}

	/* Map vNIC resources from BAR0 */
	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "BAR0 not memory-map'able, aborting.\n");
		err = -ENODEV;
		goto err_out_release_regions;
	}

	fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
	fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
	fnic->bar0.len = pci_resource_len(pdev, 0);

	if (!fnic->bar0.vaddr) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Cannot memory-map BAR0 res hdr, "
			     "aborting.\n");
		err = -ENODEV;
		goto err_out_release_regions;
	}

	fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
	if (!fnic->vdev) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "vNIC registration failed, "
			     "aborting.\n");
		err = -ENODEV;
		goto err_out_iounmap;
	}

	err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
			    vnic_dev_open_done, 0);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "vNIC dev open failed, aborting.\n");
		goto err_out_vnic_unregister;
	}

	err = vnic_dev_init(fnic->vdev, 0);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "vNIC dev init failed, aborting.\n");
		goto err_out_dev_close;
	}

	err = vnic_dev_mac_addr(fnic->vdev, fnic->mac_addr);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "vNIC get MAC addr failed \n");
		goto err_out_dev_close;
	}

	/* Get vNIC configuration */
	err = fnic_get_vnic_config(fnic);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Get vNIC configuration failed, "
			     "aborting.\n");
		goto err_out_dev_close;
	}
	host->max_lun = fnic->config.luns_per_tgt;
	host->max_id = FNIC_MAX_FCP_TARGET;

	fnic_get_res_counts(fnic);

	err = fnic_set_intr_mode(fnic);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Failed to set intr mode, "
			     "aborting.\n");
		goto err_out_dev_close;
	}

	err = fnic_request_intr(fnic);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Unable to request irq.\n");
		goto err_out_clear_intr;
	}

	err = fnic_alloc_vnic_resources(fnic);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Failed to alloc vNIC resources, "
			     "aborting.\n");
		goto err_out_free_intr;
	}


	/* initialize all fnic locks */
	spin_lock_init(&fnic->fnic_lock);

	for (i = 0; i < FNIC_WQ_MAX; i++)
		spin_lock_init(&fnic->wq_lock[i]);

	for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
		spin_lock_init(&fnic->wq_copy_lock[i]);
		fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
		fnic->fw_ack_recd[i] = 0;
		fnic->fw_ack_index[i] = -1;
	}

	for (i = 0; i < FNIC_IO_LOCKS; i++)
		spin_lock_init(&fnic->io_req_lock[i]);

	fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
	if (!fnic->io_req_pool)
		goto err_out_free_resources;

	pool = mempool_create(2, fnic_alloc_slab_dma, mempool_free_slab,
			      fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
	if (!pool)
		goto err_out_free_ioreq_pool;
	fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;

	pool = mempool_create(2, fnic_alloc_slab_dma, mempool_free_slab,
			      fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
	if (!pool)
		goto err_out_free_dflt_pool;
	fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;

	/* setup vlan config, hw inserts vlan header */
	fnic->vlan_hw_insert = 1;
	fnic->vlan_id = 0;

	fnic->flogi_oxid = FC_XID_UNKNOWN;
	fnic->flogi = NULL;
	fnic->flogi_resp = NULL;
	fnic->state = FNIC_IN_FC_MODE;

	/* Enable hardware stripping of vlan header on ingress */
	fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);

	/* Setup notification buffer area */
	err = fnic_notify_set(fnic);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "Failed to alloc notify buffer, aborting.\n");
		goto err_out_free_max_pool;
	}

	/* Setup notify timer when using MSI interrupts */
	if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
		setup_timer(&fnic->notify_timer,
			    fnic_notify_timer, (unsigned long)fnic);

	/* allocate RQ buffers and post them to RQ*/
	for (i = 0; i < fnic->rq_count; i++) {
		err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
		if (err) {
			shost_printk(KERN_ERR, fnic->lport->host,
				     "fnic_alloc_rq_frame can't alloc "
				     "frame\n");
			goto err_out_free_rq_buf;
		}
	}

	/*
	 * Initialization done with PCI system, hardware, firmware.
	 * Add host to SCSI
	 */
	err = scsi_add_host(lp->host, &pdev->dev);
	if (err) {
		shost_printk(KERN_ERR, fnic->lport->host,
			     "fnic: scsi_add_host failed...exiting\n");
		goto err_out_free_rq_buf;
	}

	/* Start local port initiatialization */

	lp->link_up = 0;
	lp->tt = fnic_transport_template;

	lp->max_retry_count = fnic->config.flogi_retries;
	lp->max_rport_retry_count = fnic->config.plogi_retries;
	lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
			      FCP_SPPF_CONF_COMPL);
	if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
		lp->service_params |= FCP_SPPF_RETRY;

	lp->boot_time = jiffies;
	lp->e_d_tov = fnic->config.ed_tov;
	lp->r_a_tov = fnic->config.ra_tov;
	lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
	fc_set_wwnn(lp, fnic->config.node_wwn);
	fc_set_wwpn(lp, fnic->config.port_wwn);

	fc_lport_init(lp);
	fc_exch_init(lp);
	fc_elsct_init(lp);
	fc_rport_init(lp);
	fc_disc_init(lp);

	if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
			       FCPIO_HOST_EXCH_RANGE_END, NULL)) {
		err = -ENOMEM;
		goto err_out_remove_scsi_host;
	}

	fc_lport_config(lp);

	if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
		       sizeof(struct fc_frame_header))) {
		err = -EINVAL;
		goto err_out_free_exch_mgr;
	}
	fc_host_maxframe_size(lp->host) = lp->mfs;

	sprintf(fc_host_symbolic_name(lp->host),
		DRV_NAME " v" DRV_VERSION " over %s", fnic->name);

	spin_lock_irqsave(&fnic_list_lock, flags);
	list_add_tail(&fnic->list, &fnic_list);
	spin_unlock_irqrestore(&fnic_list_lock, flags);

	INIT_WORK(&fnic->link_work, fnic_handle_link);
	INIT_WORK(&fnic->frame_work, fnic_handle_frame);
	skb_queue_head_init(&fnic->frame_queue);

	/* Enable all queues */
	for (i = 0; i < fnic->raw_wq_count; i++)
		vnic_wq_enable(&fnic->wq[i]);
	for (i = 0; i < fnic->rq_count; i++)
		vnic_rq_enable(&fnic->rq[i]);
	for (i = 0; i < fnic->wq_copy_count; i++)
		vnic_wq_copy_enable(&fnic->wq_copy[i]);

	fc_fabric_login(lp);

	vnic_dev_enable(fnic->vdev);
	for (i = 0; i < fnic->intr_count; i++)
		vnic_intr_unmask(&fnic->intr[i]);

	fnic_notify_timer_start(fnic);

	return 0;

err_out_free_exch_mgr:
	fc_exch_mgr_free(lp);
err_out_remove_scsi_host:
	fc_remove_host(fnic->lport->host);
	scsi_remove_host(fnic->lport->host);
err_out_free_rq_buf:
	for (i = 0; i < fnic->rq_count; i++)
		vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
	vnic_dev_notify_unset(fnic->vdev);
err_out_free_max_pool:
	mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
err_out_free_dflt_pool:
	mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
err_out_free_ioreq_pool:
	mempool_destroy(fnic->io_req_pool);
err_out_free_resources:
	fnic_free_vnic_resources(fnic);
err_out_free_intr:
	fnic_free_intr(fnic);
err_out_clear_intr:
	fnic_clear_intr_mode(fnic);
err_out_dev_close:
	vnic_dev_close(fnic->vdev);
err_out_vnic_unregister:
	vnic_dev_unregister(fnic->vdev);
err_out_iounmap:
	fnic_iounmap(fnic);
err_out_release_regions:
	pci_release_regions(pdev);
err_out_disable_device:
	pci_disable_device(pdev);
err_out_free_hba:
	scsi_host_put(lp->host);
err_out:
	return err;
}

static void __devexit fnic_remove(struct pci_dev *pdev)
{
	struct fnic *fnic = pci_get_drvdata(pdev);
	unsigned long flags;

	/*
	 * Mark state so that the workqueue thread stops forwarding
	 * received frames and link events to the local port. ISR and
	 * other threads that can queue work items will also stop
	 * creating work items on the fnic workqueue
	 */
	spin_lock_irqsave(&fnic->fnic_lock, flags);
	fnic->stop_rx_link_events = 1;
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);

	if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
		del_timer_sync(&fnic->notify_timer);

	/*
	 * Flush the fnic event queue. After this call, there should
	 * be no event queued for this fnic device in the workqueue
	 */
	flush_workqueue(fnic_event_queue);
	skb_queue_purge(&fnic->frame_queue);

	/*
	 * Log off the fabric. This stops all remote ports, dns port,
	 * logs off the fabric. This flushes all rport, disc, lport work
	 * before returning
	 */
	fc_fabric_logoff(fnic->lport);

	spin_lock_irqsave(&fnic->fnic_lock, flags);
	fnic->in_remove = 1;
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);

	fc_lport_destroy(fnic->lport);

	/*
	 * This stops the fnic device, masks all interrupts. Completed
	 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
	 * cleaned up
	 */
	fnic_cleanup(fnic);

	BUG_ON(!skb_queue_empty(&fnic->frame_queue));

	spin_lock_irqsave(&fnic_list_lock, flags);
	list_del(&fnic->list);
	spin_unlock_irqrestore(&fnic_list_lock, flags);

	fc_remove_host(fnic->lport->host);
	scsi_remove_host(fnic->lport->host);
	fc_exch_mgr_free(fnic->lport);
	vnic_dev_notify_unset(fnic->vdev);
	fnic_free_vnic_resources(fnic);
	fnic_free_intr(fnic);
	fnic_clear_intr_mode(fnic);
	vnic_dev_close(fnic->vdev);
	vnic_dev_unregister(fnic->vdev);
	fnic_iounmap(fnic);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
	scsi_host_put(fnic->lport->host);
}

static struct pci_driver fnic_driver = {
	.name = DRV_NAME,
	.id_table = fnic_id_table,
	.probe = fnic_probe,
	.remove = __devexit_p(fnic_remove),
};

static int __init fnic_init_module(void)
{
	size_t len;
	int err = 0;

	printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);

	/* Create a cache for allocation of default size sgls */
	len = sizeof(struct fnic_dflt_sgl_list);
	fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
		("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
		 SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA,
		 NULL);
	if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
		printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
		err = -ENOMEM;
		goto err_create_fnic_sgl_slab_dflt;
	}

	/* Create a cache for allocation of max size sgls*/
	len = sizeof(struct fnic_sgl_list);
	fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
		("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
		 SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA,
		 NULL);
	if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
		printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
		err = -ENOMEM;
		goto err_create_fnic_sgl_slab_max;
	}

	/* Create a cache of io_req structs for use via mempool */
	fnic_io_req_cache = kmem_cache_create("fnic_io_req",
					      sizeof(struct fnic_io_req),
					      0, SLAB_HWCACHE_ALIGN, NULL);
	if (!fnic_io_req_cache) {
		printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
		err = -ENOMEM;
		goto err_create_fnic_ioreq_slab;
	}

	fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
	if (!fnic_event_queue) {
		printk(KERN_ERR PFX "fnic work queue create failed\n");
		err = -ENOMEM;
		goto err_create_fnic_workq;
	}

	spin_lock_init(&fnic_list_lock);
	INIT_LIST_HEAD(&fnic_list);

	fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
	if (!fnic_fc_transport) {
		printk(KERN_ERR PFX "fc_attach_transport error\n");
		err = -ENOMEM;
		goto err_fc_transport;
	}

	/* register the driver with PCI system */
	err = pci_register_driver(&fnic_driver);
	if (err < 0) {
		printk(KERN_ERR PFX "pci register error\n");
		goto err_pci_register;
	}
	return err;

err_pci_register:
	fc_release_transport(fnic_fc_transport);
err_fc_transport:
	destroy_workqueue(fnic_event_queue);
err_create_fnic_workq:
	kmem_cache_destroy(fnic_io_req_cache);
err_create_fnic_ioreq_slab:
	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
err_create_fnic_sgl_slab_max:
	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
err_create_fnic_sgl_slab_dflt:
	return err;
}

static void __exit fnic_cleanup_module(void)
{
	pci_unregister_driver(&fnic_driver);
	destroy_workqueue(fnic_event_queue);
	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
	kmem_cache_destroy(fnic_io_req_cache);
	fc_release_transport(fnic_fc_transport);
}

module_init(fnic_init_module);
module_exit(fnic_cleanup_module);