summaryrefslogtreecommitdiff
path: root/drivers/infiniband/sw/rdmavt/vt.c
blob: a4553b2b3696d92aabe47e2226eb6b7e369c3e89 (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
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
/*
 * Copyright(c) 2016 Intel Corporation.
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * BSD LICENSE
 *
 * 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.
 *  - Neither the name of Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include "vt.h"
#include "trace.h"

#define RVT_UVERBS_ABI_VERSION 2

MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("RDMA Verbs Transport Library");

static int rvt_init(void)
{
	/*
	 * rdmavt does not need to do anything special when it starts up. All it
	 * needs to do is sit and wait until a driver attempts registration.
	 */
	return 0;
}
module_init(rvt_init);

static void rvt_cleanup(void)
{
	/*
	 * Nothing to do at exit time either. The module won't be able to be
	 * removed until all drivers are gone which means all the dev structs
	 * are gone so there is really nothing to do.
	 */
}
module_exit(rvt_cleanup);

/**
 * rvt_alloc_device - allocate rdi
 * @size: how big of a structure to allocate
 * @nports: number of ports to allocate array slots for
 *
 * Use IB core device alloc to allocate space for the rdi which is assumed to be
 * inside of the ib_device. Any extra space that drivers require should be
 * included in size.
 *
 * We also allocate a port array based on the number of ports.
 *
 * Return: pointer to allocated rdi
 */
struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)
{
	struct rvt_dev_info *rdi = ERR_PTR(-ENOMEM);

	rdi = (struct rvt_dev_info *)ib_alloc_device(size);
	if (!rdi)
		return rdi;

	rdi->ports = kcalloc(nports,
			     sizeof(struct rvt_ibport **),
			     GFP_KERNEL);
	if (!rdi->ports)
		ib_dealloc_device(&rdi->ibdev);

	return rdi;
}
EXPORT_SYMBOL(rvt_alloc_device);

/**
 * rvt_dealloc_device - deallocate rdi
 * @rdi: structure to free
 *
 * Free a structure allocated with rvt_alloc_device()
 */
void rvt_dealloc_device(struct rvt_dev_info *rdi)
{
	kfree(rdi->ports);
	ib_dealloc_device(&rdi->ibdev);
}
EXPORT_SYMBOL(rvt_dealloc_device);

static int rvt_query_device(struct ib_device *ibdev,
			    struct ib_device_attr *props,
			    struct ib_udata *uhw)
{
	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);

	if (uhw->inlen || uhw->outlen)
		return -EINVAL;
	/*
	 * Return rvt_dev_info.dparms.props contents
	 */
	*props = rdi->dparms.props;
	return 0;
}

static int rvt_modify_device(struct ib_device *device,
			     int device_modify_mask,
			     struct ib_device_modify *device_modify)
{
	/*
	 * There is currently no need to supply this based on qib and hfi1.
	 * Future drivers may need to implement this though.
	 */

	return -EOPNOTSUPP;
}

/**
 * rvt_query_port: Passes the query port call to the driver
 * @ibdev: Verbs IB dev
 * @port_num: port number, 1 based from ib core
 * @props: structure to hold returned properties
 *
 * Return: 0 on success
 */
static int rvt_query_port(struct ib_device *ibdev, u8 port_num,
			  struct ib_port_attr *props)
{
	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
	struct rvt_ibport *rvp;
	int port_index = ibport_num_to_idx(ibdev, port_num);

	if (port_index < 0)
		return -EINVAL;

	rvp = rdi->ports[port_index];
	/* props being zeroed by the caller, avoid zeroing it here */
	props->sm_lid = rvp->sm_lid;
	props->sm_sl = rvp->sm_sl;
	props->port_cap_flags = rvp->port_cap_flags;
	props->max_msg_sz = 0x80000000;
	props->pkey_tbl_len = rvt_get_npkeys(rdi);
	props->bad_pkey_cntr = rvp->pkey_violations;
	props->qkey_viol_cntr = rvp->qkey_violations;
	props->subnet_timeout = rvp->subnet_timeout;
	props->init_type_reply = 0;

	/* Populate the remaining ib_port_attr elements */
	return rdi->driver_f.query_port_state(rdi, port_num, props);
}

/**
 * rvt_modify_port
 * @ibdev: Verbs IB dev
 * @port_num: Port number, 1 based from ib core
 * @port_modify_mask: How to change the port
 * @props: Structure to fill in
 *
 * Return: 0 on success
 */
static int rvt_modify_port(struct ib_device *ibdev, u8 port_num,
			   int port_modify_mask, struct ib_port_modify *props)
{
	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
	struct rvt_ibport *rvp;
	int ret = 0;
	int port_index = ibport_num_to_idx(ibdev, port_num);

	if (port_index < 0)
		return -EINVAL;

	rvp = rdi->ports[port_index];
	if (port_modify_mask & IB_PORT_OPA_MASK_CHG) {
		rvp->port_cap3_flags |= props->set_port_cap_mask;
		rvp->port_cap3_flags &= ~props->clr_port_cap_mask;
	} else {
		rvp->port_cap_flags |= props->set_port_cap_mask;
		rvp->port_cap_flags &= ~props->clr_port_cap_mask;
	}

	if (props->set_port_cap_mask || props->clr_port_cap_mask)
		rdi->driver_f.cap_mask_chg(rdi, port_num);
	if (port_modify_mask & IB_PORT_SHUTDOWN)
		ret = rdi->driver_f.shut_down_port(rdi, port_num);
	if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
		rvp->qkey_violations = 0;

	return ret;
}

/**
 * rvt_query_pkey - Return a pkey from the table at a given index
 * @ibdev: Verbs IB dev
 * @port_num: Port number, 1 based from ib core
 * @index: Index into pkey table
 * @pkey: returned pkey from the port pkey table
 *
 * Return: 0 on failure pkey otherwise
 */
static int rvt_query_pkey(struct ib_device *ibdev, u8 port_num, u16 index,
			  u16 *pkey)
{
	/*
	 * Driver will be responsible for keeping rvt_dev_info.pkey_table up to
	 * date. This function will just return that value. There is no need to
	 * lock, if a stale value is read and sent to the user so be it there is
	 * no way to protect against that anyway.
	 */
	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
	int port_index;

	port_index = ibport_num_to_idx(ibdev, port_num);
	if (port_index < 0)
		return -EINVAL;

	if (index >= rvt_get_npkeys(rdi))
		return -EINVAL;

	*pkey = rvt_get_pkey(rdi, port_index, index);
	return 0;
}

/**
 * rvt_query_gid - Return a gid from the table
 * @ibdev: Verbs IB dev
 * @port_num: Port number, 1 based from ib core
 * @guid_index: Index in table
 * @gid: Gid to return
 *
 * Return: 0 on success
 */
static int rvt_query_gid(struct ib_device *ibdev, u8 port_num,
			 int guid_index, union ib_gid *gid)
{
	struct rvt_dev_info *rdi;
	struct rvt_ibport *rvp;
	int port_index;

	/*
	 * Driver is responsible for updating the guid table. Which will be used
	 * to craft the return value. This will work similar to how query_pkey()
	 * is being done.
	 */
	port_index = ibport_num_to_idx(ibdev, port_num);
	if (port_index < 0)
		return -EINVAL;

	rdi = ib_to_rvt(ibdev);
	rvp = rdi->ports[port_index];

	gid->global.subnet_prefix = rvp->gid_prefix;

	return rdi->driver_f.get_guid_be(rdi, rvp, guid_index,
					 &gid->global.interface_id);
}

struct rvt_ucontext {
	struct ib_ucontext ibucontext;
};

static inline struct rvt_ucontext *to_iucontext(struct ib_ucontext
						*ibucontext)
{
	return container_of(ibucontext, struct rvt_ucontext, ibucontext);
}

/**
 * rvt_alloc_ucontext - Allocate a user context
 * @ibdev: Verbs IB dev
 * @udata: User data allocated
 */
static struct ib_ucontext *rvt_alloc_ucontext(struct ib_device *ibdev,
					      struct ib_udata *udata)
{
	struct rvt_ucontext *context;

	context = kmalloc(sizeof(*context), GFP_KERNEL);
	if (!context)
		return ERR_PTR(-ENOMEM);
	return &context->ibucontext;
}

/**
 *rvt_dealloc_ucontext - Free a user context
 *@context - Free this
 */
static int rvt_dealloc_ucontext(struct ib_ucontext *context)
{
	kfree(to_iucontext(context));
	return 0;
}

static int rvt_get_port_immutable(struct ib_device *ibdev, u8 port_num,
				  struct ib_port_immutable *immutable)
{
	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
	struct ib_port_attr attr;
	int err, port_index;

	port_index = ibport_num_to_idx(ibdev, port_num);
	if (port_index < 0)
		return -EINVAL;

	immutable->core_cap_flags = rdi->dparms.core_cap_flags;

	err = ib_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->max_mad_size = rdi->dparms.max_mad_size;

	return 0;
}

enum {
	MISC,
	QUERY_DEVICE,
	MODIFY_DEVICE,
	QUERY_PORT,
	MODIFY_PORT,
	QUERY_PKEY,
	QUERY_GID,
	ALLOC_UCONTEXT,
	DEALLOC_UCONTEXT,
	GET_PORT_IMMUTABLE,
	CREATE_QP,
	MODIFY_QP,
	DESTROY_QP,
	QUERY_QP,
	POST_SEND,
	POST_RECV,
	POST_SRQ_RECV,
	CREATE_AH,
	DESTROY_AH,
	MODIFY_AH,
	QUERY_AH,
	CREATE_SRQ,
	MODIFY_SRQ,
	DESTROY_SRQ,
	QUERY_SRQ,
	ATTACH_MCAST,
	DETACH_MCAST,
	GET_DMA_MR,
	REG_USER_MR,
	DEREG_MR,
	ALLOC_MR,
	MAP_MR_SG,
	ALLOC_FMR,
	MAP_PHYS_FMR,
	UNMAP_FMR,
	DEALLOC_FMR,
	MMAP,
	CREATE_CQ,
	DESTROY_CQ,
	POLL_CQ,
	REQ_NOTFIY_CQ,
	RESIZE_CQ,
	ALLOC_PD,
	DEALLOC_PD,
	_VERB_IDX_MAX /* Must always be last! */
};

static inline int check_driver_override(struct rvt_dev_info *rdi,
					size_t offset, void *func)
{
	if (!*(void **)((void *)&rdi->ibdev + offset)) {
		*(void **)((void *)&rdi->ibdev + offset) = func;
		return 0;
	}

	return 1;
}

static noinline int check_support(struct rvt_dev_info *rdi, int verb)
{
	switch (verb) {
	case MISC:
		/*
		 * These functions are not part of verbs specifically but are
		 * required for rdmavt to function.
		 */
		if ((!rdi->driver_f.port_callback) ||
		    (!rdi->driver_f.get_pci_dev))
			return -EINVAL;
		break;

	case QUERY_DEVICE:
		check_driver_override(rdi, offsetof(struct ib_device,
						    query_device),
						    rvt_query_device);
		break;

	case MODIFY_DEVICE:
		/*
		 * rdmavt does not support modify device currently drivers must
		 * provide.
		 */
		if (!check_driver_override(rdi, offsetof(struct ib_device,
							 modify_device),
					   rvt_modify_device))
			return -EOPNOTSUPP;
		break;

	case QUERY_PORT:
		if (!check_driver_override(rdi, offsetof(struct ib_device,
							 query_port),
					   rvt_query_port))
			if (!rdi->driver_f.query_port_state)
				return -EINVAL;
		break;

	case MODIFY_PORT:
		if (!check_driver_override(rdi, offsetof(struct ib_device,
							 modify_port),
					   rvt_modify_port))
			if (!rdi->driver_f.cap_mask_chg ||
			    !rdi->driver_f.shut_down_port)
				return -EINVAL;
		break;

	case QUERY_PKEY:
		check_driver_override(rdi, offsetof(struct ib_device,
						    query_pkey),
				      rvt_query_pkey);
		break;

	case QUERY_GID:
		if (!check_driver_override(rdi, offsetof(struct ib_device,
							 query_gid),
					   rvt_query_gid))
			if (!rdi->driver_f.get_guid_be)
				return -EINVAL;
		break;

	case ALLOC_UCONTEXT:
		check_driver_override(rdi, offsetof(struct ib_device,
						    alloc_ucontext),
				      rvt_alloc_ucontext);
		break;

	case DEALLOC_UCONTEXT:
		check_driver_override(rdi, offsetof(struct ib_device,
						    dealloc_ucontext),
				      rvt_dealloc_ucontext);
		break;

	case GET_PORT_IMMUTABLE:
		check_driver_override(rdi, offsetof(struct ib_device,
						    get_port_immutable),
				      rvt_get_port_immutable);
		break;

	case CREATE_QP:
		if (!check_driver_override(rdi, offsetof(struct ib_device,
							 create_qp),
					   rvt_create_qp))
			if (!rdi->driver_f.qp_priv_alloc ||
			    !rdi->driver_f.qp_priv_free ||
			    !rdi->driver_f.notify_qp_reset ||
			    !rdi->driver_f.flush_qp_waiters ||
			    !rdi->driver_f.stop_send_queue ||
			    !rdi->driver_f.quiesce_qp)
				return -EINVAL;
		break;

	case MODIFY_QP:
		if (!check_driver_override(rdi, offsetof(struct ib_device,
							 modify_qp),
					   rvt_modify_qp))
			if (!rdi->driver_f.notify_qp_reset ||
			    !rdi->driver_f.schedule_send ||
			    !rdi->driver_f.get_pmtu_from_attr ||
			    !rdi->driver_f.flush_qp_waiters ||
			    !rdi->driver_f.stop_send_queue ||
			    !rdi->driver_f.quiesce_qp ||
			    !rdi->driver_f.notify_error_qp ||
			    !rdi->driver_f.mtu_from_qp ||
			    !rdi->driver_f.mtu_to_path_mtu)
				return -EINVAL;
		break;

	case DESTROY_QP:
		if (!check_driver_override(rdi, offsetof(struct ib_device,
							 destroy_qp),
					   rvt_destroy_qp))
			if (!rdi->driver_f.qp_priv_free ||
			    !rdi->driver_f.notify_qp_reset ||
			    !rdi->driver_f.flush_qp_waiters ||
			    !rdi->driver_f.stop_send_queue ||
			    !rdi->driver_f.quiesce_qp)
				return -EINVAL;
		break;

	case QUERY_QP:
		check_driver_override(rdi, offsetof(struct ib_device,
						    query_qp),
						    rvt_query_qp);
		break;

	case POST_SEND:
		if (!check_driver_override(rdi, offsetof(struct ib_device,
							 post_send),
					   rvt_post_send))
			if (!rdi->driver_f.schedule_send ||
			    !rdi->driver_f.do_send ||
			    !rdi->post_parms)
				return -EINVAL;
		break;

	case POST_RECV:
		check_driver_override(rdi, offsetof(struct ib_device,
						    post_recv),
				      rvt_post_recv);
		break;
	case POST_SRQ_RECV:
		check_driver_override(rdi, offsetof(struct ib_device,
						    post_srq_recv),
				      rvt_post_srq_recv);
		break;

	case CREATE_AH:
		check_driver_override(rdi, offsetof(struct ib_device,
						    create_ah),
				      rvt_create_ah);
		break;

	case DESTROY_AH:
		check_driver_override(rdi, offsetof(struct ib_device,
						    destroy_ah),
				      rvt_destroy_ah);
		break;

	case MODIFY_AH:
		check_driver_override(rdi, offsetof(struct ib_device,
						    modify_ah),
				      rvt_modify_ah);
		break;

	case QUERY_AH:
		check_driver_override(rdi, offsetof(struct ib_device,
						    query_ah),
				      rvt_query_ah);
		break;

	case CREATE_SRQ:
		check_driver_override(rdi, offsetof(struct ib_device,
						    create_srq),
				      rvt_create_srq);
		break;

	case MODIFY_SRQ:
		check_driver_override(rdi, offsetof(struct ib_device,
						    modify_srq),
				      rvt_modify_srq);
		break;

	case DESTROY_SRQ:
		check_driver_override(rdi, offsetof(struct ib_device,
						    destroy_srq),
				      rvt_destroy_srq);
		break;

	case QUERY_SRQ:
		check_driver_override(rdi, offsetof(struct ib_device,
						    query_srq),
				      rvt_query_srq);
		break;

	case ATTACH_MCAST:
		check_driver_override(rdi, offsetof(struct ib_device,
						    attach_mcast),
				      rvt_attach_mcast);
		break;

	case DETACH_MCAST:
		check_driver_override(rdi, offsetof(struct ib_device,
						    detach_mcast),
				      rvt_detach_mcast);
		break;

	case GET_DMA_MR:
		check_driver_override(rdi, offsetof(struct ib_device,
						    get_dma_mr),
				      rvt_get_dma_mr);
		break;

	case REG_USER_MR:
		check_driver_override(rdi, offsetof(struct ib_device,
						    reg_user_mr),
				      rvt_reg_user_mr);
		break;

	case DEREG_MR:
		check_driver_override(rdi, offsetof(struct ib_device,
						    dereg_mr),
				      rvt_dereg_mr);
		break;

	case ALLOC_FMR:
		check_driver_override(rdi, offsetof(struct ib_device,
						    alloc_fmr),
				      rvt_alloc_fmr);
		break;

	case ALLOC_MR:
		check_driver_override(rdi, offsetof(struct ib_device,
						    alloc_mr),
				      rvt_alloc_mr);
		break;

	case MAP_MR_SG:
		check_driver_override(rdi, offsetof(struct ib_device,
						    map_mr_sg),
				      rvt_map_mr_sg);
		break;

	case MAP_PHYS_FMR:
		check_driver_override(rdi, offsetof(struct ib_device,
						    map_phys_fmr),
				      rvt_map_phys_fmr);
		break;

	case UNMAP_FMR:
		check_driver_override(rdi, offsetof(struct ib_device,
						    unmap_fmr),
				      rvt_unmap_fmr);
		break;

	case DEALLOC_FMR:
		check_driver_override(rdi, offsetof(struct ib_device,
						    dealloc_fmr),
				      rvt_dealloc_fmr);
		break;

	case MMAP:
		check_driver_override(rdi, offsetof(struct ib_device,
						    mmap),
				      rvt_mmap);
		break;

	case CREATE_CQ:
		check_driver_override(rdi, offsetof(struct ib_device,
						    create_cq),
				      rvt_create_cq);
		break;

	case DESTROY_CQ:
		check_driver_override(rdi, offsetof(struct ib_device,
						    destroy_cq),
				      rvt_destroy_cq);
		break;

	case POLL_CQ:
		check_driver_override(rdi, offsetof(struct ib_device,
						    poll_cq),
				      rvt_poll_cq);
		break;

	case REQ_NOTFIY_CQ:
		check_driver_override(rdi, offsetof(struct ib_device,
						    req_notify_cq),
				      rvt_req_notify_cq);
		break;

	case RESIZE_CQ:
		check_driver_override(rdi, offsetof(struct ib_device,
						    resize_cq),
				      rvt_resize_cq);
		break;

	case ALLOC_PD:
		check_driver_override(rdi, offsetof(struct ib_device,
						    alloc_pd),
				      rvt_alloc_pd);
		break;

	case DEALLOC_PD:
		check_driver_override(rdi, offsetof(struct ib_device,
						    dealloc_pd),
				      rvt_dealloc_pd);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

/**
 * rvt_register_device - register a driver
 * @rdi: main dev structure for all of rdmavt operations
 *
 * It is up to drivers to allocate the rdi and fill in the appropriate
 * information.
 *
 * Return: 0 on success otherwise an errno.
 */
int rvt_register_device(struct rvt_dev_info *rdi)
{
	int ret = 0, i;

	if (!rdi)
		return -EINVAL;

	/*
	 * Check to ensure drivers have setup the required helpers for the verbs
	 * they want rdmavt to handle
	 */
	for (i = 0; i < _VERB_IDX_MAX; i++)
		if (check_support(rdi, i)) {
			pr_err("Driver support req not met at %d\n", i);
			return -EINVAL;
		}


	/* Once we get past here we can use rvt_pr macros and tracepoints */
	trace_rvt_dbg(rdi, "Driver attempting registration");
	rvt_mmap_init(rdi);

	/* Queue Pairs */
	ret = rvt_driver_qp_init(rdi);
	if (ret) {
		pr_err("Error in driver QP init.\n");
		return -EINVAL;
	}

	/* Address Handle */
	spin_lock_init(&rdi->n_ahs_lock);
	rdi->n_ahs_allocated = 0;

	/* Shared Receive Queue */
	rvt_driver_srq_init(rdi);

	/* Multicast */
	rvt_driver_mcast_init(rdi);

	/* Mem Region */
	ret = rvt_driver_mr_init(rdi);
	if (ret) {
		pr_err("Error in driver MR init.\n");
		goto bail_no_mr;
	}

	/* Completion queues */
	ret = rvt_driver_cq_init(rdi);
	if (ret) {
		pr_err("Error in driver CQ init.\n");
		goto bail_mr;
	}

	/* DMA Operations */
	rdi->ibdev.dev.dma_ops = rdi->ibdev.dev.dma_ops ? : &dma_virt_ops;

	/* Protection Domain */
	spin_lock_init(&rdi->n_pds_lock);
	rdi->n_pds_allocated = 0;

	/*
	 * There are some things which could be set by underlying drivers but
	 * really should be up to rdmavt to set. For instance drivers can't know
	 * exactly which functions rdmavt supports, nor do they know the ABI
	 * version, so we do all of this sort of stuff here.
	 */
	rdi->ibdev.uverbs_abi_ver = RVT_UVERBS_ABI_VERSION;
	rdi->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_CREATE_AH)           |
		(1ull << IB_USER_VERBS_CMD_MODIFY_AH)           |
		(1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
		(1ull << IB_USER_VERBS_CMD_DESTROY_AH)          |
		(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_RESIZE_CQ)           |
		(1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
		(1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
		(1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
		(1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
		(1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
		(1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
		(1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
		(1ull << IB_USER_VERBS_CMD_POST_SEND)           |
		(1ull << IB_USER_VERBS_CMD_POST_RECV)           |
		(1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
		(1ull << IB_USER_VERBS_CMD_DETACH_MCAST)        |
		(1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
		(1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
		(1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
		(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
		(1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
	rdi->ibdev.node_type = RDMA_NODE_IB_CA;
	rdi->ibdev.num_comp_vectors = 1;

	/* We are now good to announce we exist */
	ret =  ib_register_device(&rdi->ibdev, rdi->driver_f.port_callback);
	if (ret) {
		rvt_pr_err(rdi, "Failed to register driver with ib core.\n");
		goto bail_cq;
	}

	rvt_create_mad_agents(rdi);

	rvt_pr_info(rdi, "Registration with rdmavt done.\n");
	return ret;

bail_cq:
	rvt_cq_exit(rdi);

bail_mr:
	rvt_mr_exit(rdi);

bail_no_mr:
	rvt_qp_exit(rdi);

	return ret;
}
EXPORT_SYMBOL(rvt_register_device);

/**
 * rvt_unregister_device - remove a driver
 * @rdi: rvt dev struct
 */
void rvt_unregister_device(struct rvt_dev_info *rdi)
{
	trace_rvt_dbg(rdi, "Driver is unregistering.");
	if (!rdi)
		return;

	rvt_free_mad_agents(rdi);

	ib_unregister_device(&rdi->ibdev);
	rvt_cq_exit(rdi);
	rvt_mr_exit(rdi);
	rvt_qp_exit(rdi);
}
EXPORT_SYMBOL(rvt_unregister_device);

/**
 * rvt_init_port - init internal data for driver port
 * @rdi: rvt dev strut
 * @port: rvt port
 * @port_index: 0 based index of ports, different from IB core port num
 *
 * Keep track of a list of ports. No need to have a detach port.
 * They persist until the driver goes away.
 *
 * Return: always 0
 */
int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
		  int port_index, u16 *pkey_table)
{

	rdi->ports[port_index] = port;
	rdi->ports[port_index]->pkey_table = pkey_table;

	return 0;
}
EXPORT_SYMBOL(rvt_init_port);