summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/hw/cxgb4/provider.c
blob: 49b51b7e0fd786bf49dc2187e6c661f14087f3ae (plain)
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
/*
 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * 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/moduleparam.h>
#include <linux/device.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/rtnetlink.h>
#include <linux/inetdevice.h>
#include <linux/io.h>

#include <asm/irq.h>
#include <asm/byteorder.h>

#include <rdma/iw_cm.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_user_verbs.h>

#include "iw_cxgb4.h"

static int fastreg_support = 1;
module_param(fastreg_support, int, 0644);
MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default=1)");

static struct ib_ah *c4iw_ah_create(struct ib_pd *pd,
				    struct ib_ah_attr *ah_attr,
				    struct ib_udata *udata)

{
	return ERR_PTR(-ENOSYS);
}

static int c4iw_ah_destroy(struct ib_ah *ah)
{
	return -ENOSYS;
}

static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
	return -ENOSYS;
}

static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
	return -ENOSYS;
}

static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags,
			    u8 port_num, const struct ib_wc *in_wc,
			    const struct ib_grh *in_grh,
			    const struct ib_mad_hdr *in_mad,
			    size_t in_mad_size,
			    struct ib_mad_hdr *out_mad,
			    size_t *out_mad_size,
			    u16 *out_mad_pkey_index)
{
	return -ENOSYS;
}

static int c4iw_dealloc_ucontext(struct ib_ucontext *context)
{
	struct c4iw_dev *rhp = to_c4iw_dev(context->device);
	struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
	struct c4iw_mm_entry *mm, *tmp;

	PDBG("%s context %p\n", __func__, context);
	list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
		kfree(mm);
	c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
	kfree(ucontext);
	return 0;
}

static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev,
					       struct ib_udata *udata)
{
	struct c4iw_ucontext *context;
	struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
	static int warned;
	struct c4iw_alloc_ucontext_resp uresp;
	int ret = 0;
	struct c4iw_mm_entry *mm = NULL;

	PDBG("%s ibdev %p\n", __func__, ibdev);
	context = kzalloc(sizeof(*context), GFP_KERNEL);
	if (!context) {
		ret = -ENOMEM;
		goto err;
	}

	c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
	INIT_LIST_HEAD(&context->mmaps);
	spin_lock_init(&context->mmap_lock);

	if (udata->outlen < sizeof(uresp) - sizeof(uresp.reserved)) {
		if (!warned++)
			pr_err(MOD "Warning - downlevel libcxgb4 (non-fatal), device status page disabled.");
		rhp->rdev.flags |= T4_STATUS_PAGE_DISABLED;
	} else {
		mm = kmalloc(sizeof(*mm), GFP_KERNEL);
		if (!mm) {
			ret = -ENOMEM;
			goto err_free;
		}

		uresp.status_page_size = PAGE_SIZE;

		spin_lock(&context->mmap_lock);
		uresp.status_page_key = context->key;
		context->key += PAGE_SIZE;
		spin_unlock(&context->mmap_lock);

		ret = ib_copy_to_udata(udata, &uresp,
				       sizeof(uresp) - sizeof(uresp.reserved));
		if (ret)
			goto err_mm;

		mm->key = uresp.status_page_key;
		mm->addr = virt_to_phys(rhp->rdev.status_page);
		mm->len = PAGE_SIZE;
		insert_mmap(context, mm);
	}
	return &context->ibucontext;
err_mm:
	kfree(mm);
err_free:
	kfree(context);
err:
	return ERR_PTR(ret);
}

static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
{
	int len = vma->vm_end - vma->vm_start;
	u32 key = vma->vm_pgoff << PAGE_SHIFT;
	struct c4iw_rdev *rdev;
	int ret = 0;
	struct c4iw_mm_entry *mm;
	struct c4iw_ucontext *ucontext;
	u64 addr;

	PDBG("%s pgoff 0x%lx key 0x%x len %d\n", __func__, vma->vm_pgoff,
	     key, len);

	if (vma->vm_start & (PAGE_SIZE-1))
		return -EINVAL;

	rdev = &(to_c4iw_dev(context->device)->rdev);
	ucontext = to_c4iw_ucontext(context);

	mm = remove_mmap(ucontext, key, len);
	if (!mm)
		return -EINVAL;
	addr = mm->addr;
	kfree(mm);

	if ((addr >= pci_resource_start(rdev->lldi.pdev, 0)) &&
	    (addr < (pci_resource_start(rdev->lldi.pdev, 0) +
		    pci_resource_len(rdev->lldi.pdev, 0)))) {

		/*
		 * MA_SYNC register...
		 */
		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
		ret = io_remap_pfn_range(vma, vma->vm_start,
					 addr >> PAGE_SHIFT,
					 len, vma->vm_page_prot);
	} else if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) &&
		   (addr < (pci_resource_start(rdev->lldi.pdev, 2) +
		    pci_resource_len(rdev->lldi.pdev, 2)))) {

		/*
		 * Map user DB or OCQP memory...
		 */
		if (addr >= rdev->oc_mw_pa)
			vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
		else {
			if (!is_t4(rdev->lldi.adapter_type))
				vma->vm_page_prot =
					t4_pgprot_wc(vma->vm_page_prot);
			else
				vma->vm_page_prot =
					pgprot_noncached(vma->vm_page_prot);
		}
		ret = io_remap_pfn_range(vma, vma->vm_start,
					 addr >> PAGE_SHIFT,
					 len, vma->vm_page_prot);
	} else {

		/*
		 * Map WQ or CQ contig dma memory...
		 */
		ret = remap_pfn_range(vma, vma->vm_start,
				      addr >> PAGE_SHIFT,
				      len, vma->vm_page_prot);
	}

	return ret;
}

static int c4iw_deallocate_pd(struct ib_pd *pd)
{
	struct c4iw_dev *rhp;
	struct c4iw_pd *php;

	php = to_c4iw_pd(pd);
	rhp = php->rhp;
	PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid);
	c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
	mutex_lock(&rhp->rdev.stats.lock);
	rhp->rdev.stats.pd.cur--;
	mutex_unlock(&rhp->rdev.stats.lock);
	kfree(php);
	return 0;
}

static struct ib_pd *c4iw_allocate_pd(struct ib_device *ibdev,
				      struct ib_ucontext *context,
				      struct ib_udata *udata)
{
	struct c4iw_pd *php;
	u32 pdid;
	struct c4iw_dev *rhp;

	PDBG("%s ibdev %p\n", __func__, ibdev);
	rhp = (struct c4iw_dev *) ibdev;
	pdid =  c4iw_get_resource(&rhp->rdev.resource.pdid_table);
	if (!pdid)
		return ERR_PTR(-EINVAL);
	php = kzalloc(sizeof(*php), GFP_KERNEL);
	if (!php) {
		c4iw_put_resource(&rhp->rdev.resource.pdid_table, pdid);
		return ERR_PTR(-ENOMEM);
	}
	php->pdid = pdid;
	php->rhp = rhp;
	if (context) {
		if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
			c4iw_deallocate_pd(&php->ibpd);
			return ERR_PTR(-EFAULT);
		}
	}
	mutex_lock(&rhp->rdev.stats.lock);
	rhp->rdev.stats.pd.cur++;
	if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
		rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
	mutex_unlock(&rhp->rdev.stats.lock);
	PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php);
	return &php->ibpd;
}

static int c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
			   u16 *pkey)
{
	PDBG("%s ibdev %p\n", __func__, ibdev);
	*pkey = 0;
	return 0;
}

static int c4iw_query_gid(struct ib_device *ibdev, u8 port, int index,
			  union ib_gid *gid)
{
	struct c4iw_dev *dev;

	PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
	       __func__, ibdev, port, index, gid);
	dev = to_c4iw_dev(ibdev);
	BUG_ON(port == 0);
	memset(&(gid->raw[0]), 0, sizeof(gid->raw));
	memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
	return 0;
}

static int c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
			     struct ib_udata *uhw)
{

	struct c4iw_dev *dev;

	PDBG("%s ibdev %p\n", __func__, ibdev);

	if (uhw->inlen || uhw->outlen)
		return -EINVAL;

	dev = to_c4iw_dev(ibdev);
	memset(props, 0, sizeof *props);
	memcpy(&props->sys_image_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
	props->hw_ver = CHELSIO_CHIP_RELEASE(dev->rdev.lldi.adapter_type);
	props->fw_ver = dev->rdev.lldi.fw_vers;
	props->device_cap_flags = dev->device_cap_flags;
	props->page_size_cap = T4_PAGESIZE_MASK;
	props->vendor_id = (u32)dev->rdev.lldi.pdev->vendor;
	props->vendor_part_id = (u32)dev->rdev.lldi.pdev->device;
	props->max_mr_size = T4_MAX_MR_SIZE;
	props->max_qp = dev->rdev.lldi.vr->qp.size / 2;
	props->max_qp_wr = dev->rdev.hw_queue.t4_max_qp_depth;
	props->max_sge = T4_MAX_RECV_SGE;
	props->max_sge_rd = 1;
	props->max_res_rd_atom = dev->rdev.lldi.max_ird_adapter;
	props->max_qp_rd_atom = min(dev->rdev.lldi.max_ordird_qp,
				    c4iw_max_read_depth);
	props->max_qp_init_rd_atom = props->max_qp_rd_atom;
	props->max_cq = dev->rdev.lldi.vr->qp.size;
	props->max_cqe = dev->rdev.hw_queue.t4_max_cq_depth;
	props->max_mr = c4iw_num_stags(&dev->rdev);
	props->max_pd = T4_MAX_NUM_PD;
	props->local_ca_ack_delay = 0;
	props->max_fast_reg_page_list_len =
		t4_max_fr_depth(dev->rdev.lldi.ulptx_memwrite_dsgl && use_dsgl);

	return 0;
}

static int c4iw_query_port(struct ib_device *ibdev, u8 port,
			   struct ib_port_attr *props)
{
	struct c4iw_dev *dev;
	struct net_device *netdev;
	struct in_device *inetdev;

	PDBG("%s ibdev %p\n", __func__, ibdev);

	dev = to_c4iw_dev(ibdev);
	netdev = dev->rdev.lldi.ports[port-1];

	memset(props, 0, sizeof(struct ib_port_attr));
	props->max_mtu = IB_MTU_4096;
	if (netdev->mtu >= 4096)
		props->active_mtu = IB_MTU_4096;
	else if (netdev->mtu >= 2048)
		props->active_mtu = IB_MTU_2048;
	else if (netdev->mtu >= 1024)
		props->active_mtu = IB_MTU_1024;
	else if (netdev->mtu >= 512)
		props->active_mtu = IB_MTU_512;
	else
		props->active_mtu = IB_MTU_256;

	if (!netif_carrier_ok(netdev))
		props->state = IB_PORT_DOWN;
	else {
		inetdev = in_dev_get(netdev);
		if (inetdev) {
			if (inetdev->ifa_list)
				props->state = IB_PORT_ACTIVE;
			else
				props->state = IB_PORT_INIT;
			in_dev_put(inetdev);
		} else
			props->state = IB_PORT_INIT;
	}

	props->port_cap_flags =
	    IB_PORT_CM_SUP |
	    IB_PORT_SNMP_TUNNEL_SUP |
	    IB_PORT_REINIT_SUP |
	    IB_PORT_DEVICE_MGMT_SUP |
	    IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
	props->gid_tbl_len = 1;
	props->pkey_tbl_len = 1;
	props->active_width = 2;
	props->active_speed = IB_SPEED_DDR;
	props->max_msg_sz = -1;

	return 0;
}

static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
			char *buf)
{
	struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
						 ibdev.dev);
	PDBG("%s dev 0x%p\n", __func__, dev);
	return sprintf(buf, "%d\n",
		       CHELSIO_CHIP_RELEASE(c4iw_dev->rdev.lldi.adapter_type));
}

static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
			char *buf)
{
	struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
						 ibdev.dev);
	struct ethtool_drvinfo info;
	struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];

	PDBG("%s dev 0x%p\n", __func__, dev);
	lldev->ethtool_ops->get_drvinfo(lldev, &info);
	return sprintf(buf, "%s\n", info.driver);
}

static ssize_t show_board(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
						 ibdev.dev);
	PDBG("%s dev 0x%p\n", __func__, dev);
	return sprintf(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
		       c4iw_dev->rdev.lldi.pdev->device);
}

enum counters {
	IP4INSEGS,
	IP4OUTSEGS,
	IP4RETRANSSEGS,
	IP4OUTRSTS,
	IP6INSEGS,
	IP6OUTSEGS,
	IP6RETRANSSEGS,
	IP6OUTRSTS,
	NR_COUNTERS
};

static const char * const names[] = {
	[IP4INSEGS] = "ip4InSegs",
	[IP4OUTSEGS] = "ip4OutSegs",
	[IP4RETRANSSEGS] = "ip4RetransSegs",
	[IP4OUTRSTS] = "ip4OutRsts",
	[IP6INSEGS] = "ip6InSegs",
	[IP6OUTSEGS] = "ip6OutSegs",
	[IP6RETRANSSEGS] = "ip6RetransSegs",
	[IP6OUTRSTS] = "ip6OutRsts"
};

static struct rdma_hw_stats *c4iw_alloc_stats(struct ib_device *ibdev,
					      u8 port_num)
{
	BUILD_BUG_ON(ARRAY_SIZE(names) != NR_COUNTERS);

	if (port_num != 0)
		return NULL;

	return rdma_alloc_hw_stats_struct(names, NR_COUNTERS,
					  RDMA_HW_STATS_DEFAULT_LIFESPAN);
}

static int c4iw_get_mib(struct ib_device *ibdev,
			struct rdma_hw_stats *stats,
			u8 port, int index)
{
	struct tp_tcp_stats v4, v6;
	struct c4iw_dev *c4iw_dev = to_c4iw_dev(ibdev);

	cxgb4_get_tcp_stats(c4iw_dev->rdev.lldi.pdev, &v4, &v6);
	stats->value[IP4INSEGS] = v4.tcp_in_segs;
	stats->value[IP4OUTSEGS] = v4.tcp_out_segs;
	stats->value[IP4RETRANSSEGS] = v4.tcp_retrans_segs;
	stats->value[IP4OUTRSTS] = v4.tcp_out_rsts;
	stats->value[IP6INSEGS] = v6.tcp_in_segs;
	stats->value[IP6OUTSEGS] = v6.tcp_out_segs;
	stats->value[IP6RETRANSSEGS] = v6.tcp_retrans_segs;
	stats->value[IP6OUTRSTS] = v6.tcp_out_rsts;

	return stats->num_counters;
}

static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);

static struct device_attribute *c4iw_class_attributes[] = {
	&dev_attr_hw_rev,
	&dev_attr_hca_type,
	&dev_attr_board_id,
};

static int c4iw_port_immutable(struct ib_device *ibdev, u8 port_num,
			       struct ib_port_immutable *immutable)
{
	struct ib_port_attr attr;
	int err;

	err = c4iw_query_port(ibdev, port_num, &attr);
	if (err)
		return err;

	immutable->pkey_tbl_len = attr.pkey_tbl_len;
	immutable->gid_tbl_len = attr.gid_tbl_len;
	immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;

	return 0;
}

static void get_dev_fw_str(struct ib_device *dev, char *str,
			   size_t str_len)
{
	struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
						 ibdev);
	PDBG("%s dev 0x%p\n", __func__, dev);

	snprintf(str, str_len, "%u.%u.%u.%u",
		 FW_HDR_FW_VER_MAJOR_G(c4iw_dev->rdev.lldi.fw_vers),
		 FW_HDR_FW_VER_MINOR_G(c4iw_dev->rdev.lldi.fw_vers),
		 FW_HDR_FW_VER_MICRO_G(c4iw_dev->rdev.lldi.fw_vers),
		 FW_HDR_FW_VER_BUILD_G(c4iw_dev->rdev.lldi.fw_vers));
}

int c4iw_register_device(struct c4iw_dev *dev)
{
	int ret;
	int i;

	PDBG("%s c4iw_dev %p\n", __func__, dev);
	BUG_ON(!dev->rdev.lldi.ports[0]);
	strlcpy(dev->ibdev.name, "cxgb4_%d", IB_DEVICE_NAME_MAX);
	memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
	memcpy(&dev->ibdev.node_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
	dev->ibdev.owner = THIS_MODULE;
	dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
	if (fastreg_support)
		dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
	dev->ibdev.local_dma_lkey = 0;
	dev->ibdev.uverbs_cmd_mask =
	    (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
	    (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
	    (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
	    (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
	    (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
	    (1ull << IB_USER_VERBS_CMD_REG_MR) |
	    (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
	    (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
	    (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
	    (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
	    (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
	    (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
	    (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
	    (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
	    (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
	    (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
	    (1ull << IB_USER_VERBS_CMD_POST_SEND) |
	    (1ull << IB_USER_VERBS_CMD_POST_RECV);
	dev->ibdev.node_type = RDMA_NODE_RNIC;
	BUILD_BUG_ON(sizeof(C4IW_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
	memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
	dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
	dev->ibdev.num_comp_vectors =  dev->rdev.lldi.nciq;
	dev->ibdev.dma_device = &(dev->rdev.lldi.pdev->dev);
	dev->ibdev.query_device = c4iw_query_device;
	dev->ibdev.query_port = c4iw_query_port;
	dev->ibdev.query_pkey = c4iw_query_pkey;
	dev->ibdev.query_gid = c4iw_query_gid;
	dev->ibdev.alloc_ucontext = c4iw_alloc_ucontext;
	dev->ibdev.dealloc_ucontext = c4iw_dealloc_ucontext;
	dev->ibdev.mmap = c4iw_mmap;
	dev->ibdev.alloc_pd = c4iw_allocate_pd;
	dev->ibdev.dealloc_pd = c4iw_deallocate_pd;
	dev->ibdev.create_ah = c4iw_ah_create;
	dev->ibdev.destroy_ah = c4iw_ah_destroy;
	dev->ibdev.create_qp = c4iw_create_qp;
	dev->ibdev.modify_qp = c4iw_ib_modify_qp;
	dev->ibdev.query_qp = c4iw_ib_query_qp;
	dev->ibdev.destroy_qp = c4iw_destroy_qp;
	dev->ibdev.create_cq = c4iw_create_cq;
	dev->ibdev.destroy_cq = c4iw_destroy_cq;
	dev->ibdev.resize_cq = c4iw_resize_cq;
	dev->ibdev.poll_cq = c4iw_poll_cq;
	dev->ibdev.get_dma_mr = c4iw_get_dma_mr;
	dev->ibdev.reg_user_mr = c4iw_reg_user_mr;
	dev->ibdev.dereg_mr = c4iw_dereg_mr;
	dev->ibdev.alloc_mw = c4iw_alloc_mw;
	dev->ibdev.dealloc_mw = c4iw_dealloc_mw;
	dev->ibdev.alloc_mr = c4iw_alloc_mr;
	dev->ibdev.map_mr_sg = c4iw_map_mr_sg;
	dev->ibdev.attach_mcast = c4iw_multicast_attach;
	dev->ibdev.detach_mcast = c4iw_multicast_detach;
	dev->ibdev.process_mad = c4iw_process_mad;
	dev->ibdev.req_notify_cq = c4iw_arm_cq;
	dev->ibdev.post_send = c4iw_post_send;
	dev->ibdev.post_recv = c4iw_post_receive;
	dev->ibdev.alloc_hw_stats = c4iw_alloc_stats;
	dev->ibdev.get_hw_stats = c4iw_get_mib;
	dev->ibdev.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
	dev->ibdev.get_port_immutable = c4iw_port_immutable;
	dev->ibdev.get_dev_fw_str = get_dev_fw_str;
	dev->ibdev.drain_sq = c4iw_drain_sq;
	dev->ibdev.drain_rq = c4iw_drain_rq;

	dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
	if (!dev->ibdev.iwcm)
		return -ENOMEM;

	dev->ibdev.iwcm->connect = c4iw_connect;
	dev->ibdev.iwcm->accept = c4iw_accept_cr;
	dev->ibdev.iwcm->reject = c4iw_reject_cr;
	dev->ibdev.iwcm->create_listen = c4iw_create_listen;
	dev->ibdev.iwcm->destroy_listen = c4iw_destroy_listen;
	dev->ibdev.iwcm->add_ref = c4iw_qp_add_ref;
	dev->ibdev.iwcm->rem_ref = c4iw_qp_rem_ref;
	dev->ibdev.iwcm->get_qp = c4iw_get_qp;
	memcpy(dev->ibdev.iwcm->ifname, dev->rdev.lldi.ports[0]->name,
	       sizeof(dev->ibdev.iwcm->ifname));

	ret = ib_register_device(&dev->ibdev, NULL);
	if (ret)
		goto bail1;

	for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i) {
		ret = device_create_file(&dev->ibdev.dev,
					 c4iw_class_attributes[i]);
		if (ret)
			goto bail2;
	}
	return 0;
bail2:
	ib_unregister_device(&dev->ibdev);
bail1:
	kfree(dev->ibdev.iwcm);
	return ret;
}

void c4iw_unregister_device(struct c4iw_dev *dev)
{
	int i;

	PDBG("%s c4iw_dev %p\n", __func__, dev);
	for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i)
		device_remove_file(&dev->ibdev.dev,
				   c4iw_class_attributes[i]);
	ib_unregister_device(&dev->ibdev);
	kfree(dev->ibdev.iwcm);
	return;
}