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1/*
2 * Copyright(c) 2016 Intel Corporation.
3 *
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
6 *
7 * GPL LICENSE SUMMARY
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * BSD LICENSE
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 *
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * - Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
29 * distribution.
30 * - Neither the name of Intel Corporation nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 *
46 */
47
48#include <linux/module.h>
49#include <linux/kernel.h>
50#include <linux/dma-mapping.h>
51#include "vt.h"
52#include "trace.h"
53
54#define RVT_UVERBS_ABI_VERSION 2
55
56MODULE_LICENSE("Dual BSD/GPL");
57MODULE_DESCRIPTION("RDMA Verbs Transport Library");
58
59static int rvt_init(void)
60{
61 /*
62 * rdmavt does not need to do anything special when it starts up. All it
63 * needs to do is sit and wait until a driver attempts registration.
64 */
65 return 0;
66}
67module_init(rvt_init);
68
69static void rvt_cleanup(void)
70{
71 /*
72 * Nothing to do at exit time either. The module won't be able to be
73 * removed until all drivers are gone which means all the dev structs
74 * are gone so there is really nothing to do.
75 */
76}
77module_exit(rvt_cleanup);
78
79/**
80 * rvt_alloc_device - allocate rdi
81 * @size: how big of a structure to allocate
82 * @nports: number of ports to allocate array slots for
83 *
84 * Use IB core device alloc to allocate space for the rdi which is assumed to be
85 * inside of the ib_device. Any extra space that drivers require should be
86 * included in size.
87 *
88 * We also allocate a port array based on the number of ports.
89 *
90 * Return: pointer to allocated rdi
91 */
92struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)
93{
94 struct rvt_dev_info *rdi;
95
96 rdi = (struct rvt_dev_info *)ib_alloc_device(size);
97 if (!rdi)
98 return rdi;
99
100 rdi->ports = kcalloc(nports,
101 sizeof(struct rvt_ibport **),
102 GFP_KERNEL);
103 if (!rdi->ports)
104 ib_dealloc_device(&rdi->ibdev);
105
106 return rdi;
107}
108EXPORT_SYMBOL(rvt_alloc_device);
109
110/**
111 * rvt_dealloc_device - deallocate rdi
112 * @rdi: structure to free
113 *
114 * Free a structure allocated with rvt_alloc_device()
115 */
116void rvt_dealloc_device(struct rvt_dev_info *rdi)
117{
118 kfree(rdi->ports);
119 ib_dealloc_device(&rdi->ibdev);
120}
121EXPORT_SYMBOL(rvt_dealloc_device);
122
123static int rvt_query_device(struct ib_device *ibdev,
124 struct ib_device_attr *props,
125 struct ib_udata *uhw)
126{
127 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
128
129 if (uhw->inlen || uhw->outlen)
130 return -EINVAL;
131 /*
132 * Return rvt_dev_info.dparms.props contents
133 */
134 *props = rdi->dparms.props;
135 return 0;
136}
137
138static int rvt_modify_device(struct ib_device *device,
139 int device_modify_mask,
140 struct ib_device_modify *device_modify)
141{
142 /*
143 * There is currently no need to supply this based on qib and hfi1.
144 * Future drivers may need to implement this though.
145 */
146
147 return -EOPNOTSUPP;
148}
149
150/**
151 * rvt_query_port: Passes the query port call to the driver
152 * @ibdev: Verbs IB dev
153 * @port_num: port number, 1 based from ib core
154 * @props: structure to hold returned properties
155 *
156 * Return: 0 on success
157 */
158static int rvt_query_port(struct ib_device *ibdev, u8 port_num,
159 struct ib_port_attr *props)
160{
161 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
162 struct rvt_ibport *rvp;
163 int port_index = ibport_num_to_idx(ibdev, port_num);
164
165 if (port_index < 0)
166 return -EINVAL;
167
168 rvp = rdi->ports[port_index];
169 /* props being zeroed by the caller, avoid zeroing it here */
170 props->sm_lid = rvp->sm_lid;
171 props->sm_sl = rvp->sm_sl;
172 props->port_cap_flags = rvp->port_cap_flags;
173 props->max_msg_sz = 0x80000000;
174 props->pkey_tbl_len = rvt_get_npkeys(rdi);
175 props->bad_pkey_cntr = rvp->pkey_violations;
176 props->qkey_viol_cntr = rvp->qkey_violations;
177 props->subnet_timeout = rvp->subnet_timeout;
178 props->init_type_reply = 0;
179
180 /* Populate the remaining ib_port_attr elements */
181 return rdi->driver_f.query_port_state(rdi, port_num, props);
182}
183
184/**
185 * rvt_modify_port
186 * @ibdev: Verbs IB dev
187 * @port_num: Port number, 1 based from ib core
188 * @port_modify_mask: How to change the port
189 * @props: Structure to fill in
190 *
191 * Return: 0 on success
192 */
193static int rvt_modify_port(struct ib_device *ibdev, u8 port_num,
194 int port_modify_mask, struct ib_port_modify *props)
195{
196 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
197 struct rvt_ibport *rvp;
198 int ret = 0;
199 int port_index = ibport_num_to_idx(ibdev, port_num);
200
201 if (port_index < 0)
202 return -EINVAL;
203
204 rvp = rdi->ports[port_index];
205 if (port_modify_mask & IB_PORT_OPA_MASK_CHG) {
206 rvp->port_cap3_flags |= props->set_port_cap_mask;
207 rvp->port_cap3_flags &= ~props->clr_port_cap_mask;
208 } else {
209 rvp->port_cap_flags |= props->set_port_cap_mask;
210 rvp->port_cap_flags &= ~props->clr_port_cap_mask;
211 }
212
213 if (props->set_port_cap_mask || props->clr_port_cap_mask)
214 rdi->driver_f.cap_mask_chg(rdi, port_num);
215 if (port_modify_mask & IB_PORT_SHUTDOWN)
216 ret = rdi->driver_f.shut_down_port(rdi, port_num);
217 if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
218 rvp->qkey_violations = 0;
219
220 return ret;
221}
222
223/**
224 * rvt_query_pkey - Return a pkey from the table at a given index
225 * @ibdev: Verbs IB dev
226 * @port_num: Port number, 1 based from ib core
227 * @index: Index into pkey table
228 * @pkey: returned pkey from the port pkey table
229 *
230 * Return: 0 on failure pkey otherwise
231 */
232static int rvt_query_pkey(struct ib_device *ibdev, u8 port_num, u16 index,
233 u16 *pkey)
234{
235 /*
236 * Driver will be responsible for keeping rvt_dev_info.pkey_table up to
237 * date. This function will just return that value. There is no need to
238 * lock, if a stale value is read and sent to the user so be it there is
239 * no way to protect against that anyway.
240 */
241 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
242 int port_index;
243
244 port_index = ibport_num_to_idx(ibdev, port_num);
245 if (port_index < 0)
246 return -EINVAL;
247
248 if (index >= rvt_get_npkeys(rdi))
249 return -EINVAL;
250
251 *pkey = rvt_get_pkey(rdi, port_index, index);
252 return 0;
253}
254
255/**
256 * rvt_query_gid - Return a gid from the table
257 * @ibdev: Verbs IB dev
258 * @port_num: Port number, 1 based from ib core
259 * @guid_index: Index in table
260 * @gid: Gid to return
261 *
262 * Return: 0 on success
263 */
264static int rvt_query_gid(struct ib_device *ibdev, u8 port_num,
265 int guid_index, union ib_gid *gid)
266{
267 struct rvt_dev_info *rdi;
268 struct rvt_ibport *rvp;
269 int port_index;
270
271 /*
272 * Driver is responsible for updating the guid table. Which will be used
273 * to craft the return value. This will work similar to how query_pkey()
274 * is being done.
275 */
276 port_index = ibport_num_to_idx(ibdev, port_num);
277 if (port_index < 0)
278 return -EINVAL;
279
280 rdi = ib_to_rvt(ibdev);
281 rvp = rdi->ports[port_index];
282
283 gid->global.subnet_prefix = rvp->gid_prefix;
284
285 return rdi->driver_f.get_guid_be(rdi, rvp, guid_index,
286 &gid->global.interface_id);
287}
288
289struct rvt_ucontext {
290 struct ib_ucontext ibucontext;
291};
292
293static inline struct rvt_ucontext *to_iucontext(struct ib_ucontext
294 *ibucontext)
295{
296 return container_of(ibucontext, struct rvt_ucontext, ibucontext);
297}
298
299/**
300 * rvt_alloc_ucontext - Allocate a user context
301 * @ibdev: Verbs IB dev
302 * @udata: User data allocated
303 */
304static struct ib_ucontext *rvt_alloc_ucontext(struct ib_device *ibdev,
305 struct ib_udata *udata)
306{
307 struct rvt_ucontext *context;
308
309 context = kmalloc(sizeof(*context), GFP_KERNEL);
310 if (!context)
311 return ERR_PTR(-ENOMEM);
312 return &context->ibucontext;
313}
314
315/**
316 *rvt_dealloc_ucontext - Free a user context
317 *@context - Free this
318 */
319static int rvt_dealloc_ucontext(struct ib_ucontext *context)
320{
321 kfree(to_iucontext(context));
322 return 0;
323}
324
325static int rvt_get_port_immutable(struct ib_device *ibdev, u8 port_num,
326 struct ib_port_immutable *immutable)
327{
328 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
329 struct ib_port_attr attr;
330 int err, port_index;
331
332 port_index = ibport_num_to_idx(ibdev, port_num);
333 if (port_index < 0)
334 return -EINVAL;
335
336 immutable->core_cap_flags = rdi->dparms.core_cap_flags;
337
338 err = ib_query_port(ibdev, port_num, &attr);
339 if (err)
340 return err;
341
342 immutable->pkey_tbl_len = attr.pkey_tbl_len;
343 immutable->gid_tbl_len = attr.gid_tbl_len;
344 immutable->max_mad_size = rdi->dparms.max_mad_size;
345
346 return 0;
347}
348
349enum {
350 MISC,
351 QUERY_DEVICE,
352 MODIFY_DEVICE,
353 QUERY_PORT,
354 MODIFY_PORT,
355 QUERY_PKEY,
356 QUERY_GID,
357 ALLOC_UCONTEXT,
358 DEALLOC_UCONTEXT,
359 GET_PORT_IMMUTABLE,
360 CREATE_QP,
361 MODIFY_QP,
362 DESTROY_QP,
363 QUERY_QP,
364 POST_SEND,
365 POST_RECV,
366 POST_SRQ_RECV,
367 CREATE_AH,
368 DESTROY_AH,
369 MODIFY_AH,
370 QUERY_AH,
371 CREATE_SRQ,
372 MODIFY_SRQ,
373 DESTROY_SRQ,
374 QUERY_SRQ,
375 ATTACH_MCAST,
376 DETACH_MCAST,
377 GET_DMA_MR,
378 REG_USER_MR,
379 DEREG_MR,
380 ALLOC_MR,
381 MAP_MR_SG,
382 ALLOC_FMR,
383 MAP_PHYS_FMR,
384 UNMAP_FMR,
385 DEALLOC_FMR,
386 MMAP,
387 CREATE_CQ,
388 DESTROY_CQ,
389 POLL_CQ,
390 REQ_NOTFIY_CQ,
391 RESIZE_CQ,
392 ALLOC_PD,
393 DEALLOC_PD,
394 _VERB_IDX_MAX /* Must always be last! */
395};
396
397static inline int check_driver_override(struct rvt_dev_info *rdi,
398 size_t offset, void *func)
399{
400 if (!*(void **)((void *)&rdi->ibdev + offset)) {
401 *(void **)((void *)&rdi->ibdev + offset) = func;
402 return 0;
403 }
404
405 return 1;
406}
407
408static noinline int check_support(struct rvt_dev_info *rdi, int verb)
409{
410 switch (verb) {
411 case MISC:
412 /*
413 * These functions are not part of verbs specifically but are
414 * required for rdmavt to function.
415 */
416 if ((!rdi->driver_f.port_callback) ||
417 (!rdi->driver_f.get_pci_dev))
418 return -EINVAL;
419 break;
420
421 case QUERY_DEVICE:
422 check_driver_override(rdi, offsetof(struct ib_device,
423 query_device),
424 rvt_query_device);
425 break;
426
427 case MODIFY_DEVICE:
428 /*
429 * rdmavt does not support modify device currently drivers must
430 * provide.
431 */
432 if (!check_driver_override(rdi, offsetof(struct ib_device,
433 modify_device),
434 rvt_modify_device))
435 return -EOPNOTSUPP;
436 break;
437
438 case QUERY_PORT:
439 if (!check_driver_override(rdi, offsetof(struct ib_device,
440 query_port),
441 rvt_query_port))
442 if (!rdi->driver_f.query_port_state)
443 return -EINVAL;
444 break;
445
446 case MODIFY_PORT:
447 if (!check_driver_override(rdi, offsetof(struct ib_device,
448 modify_port),
449 rvt_modify_port))
450 if (!rdi->driver_f.cap_mask_chg ||
451 !rdi->driver_f.shut_down_port)
452 return -EINVAL;
453 break;
454
455 case QUERY_PKEY:
456 check_driver_override(rdi, offsetof(struct ib_device,
457 query_pkey),
458 rvt_query_pkey);
459 break;
460
461 case QUERY_GID:
462 if (!check_driver_override(rdi, offsetof(struct ib_device,
463 query_gid),
464 rvt_query_gid))
465 if (!rdi->driver_f.get_guid_be)
466 return -EINVAL;
467 break;
468
469 case ALLOC_UCONTEXT:
470 check_driver_override(rdi, offsetof(struct ib_device,
471 alloc_ucontext),
472 rvt_alloc_ucontext);
473 break;
474
475 case DEALLOC_UCONTEXT:
476 check_driver_override(rdi, offsetof(struct ib_device,
477 dealloc_ucontext),
478 rvt_dealloc_ucontext);
479 break;
480
481 case GET_PORT_IMMUTABLE:
482 check_driver_override(rdi, offsetof(struct ib_device,
483 get_port_immutable),
484 rvt_get_port_immutable);
485 break;
486
487 case CREATE_QP:
488 if (!check_driver_override(rdi, offsetof(struct ib_device,
489 create_qp),
490 rvt_create_qp))
491 if (!rdi->driver_f.qp_priv_alloc ||
492 !rdi->driver_f.qp_priv_free ||
493 !rdi->driver_f.notify_qp_reset ||
494 !rdi->driver_f.flush_qp_waiters ||
495 !rdi->driver_f.stop_send_queue ||
496 !rdi->driver_f.quiesce_qp)
497 return -EINVAL;
498 break;
499
500 case MODIFY_QP:
501 if (!check_driver_override(rdi, offsetof(struct ib_device,
502 modify_qp),
503 rvt_modify_qp))
504 if (!rdi->driver_f.notify_qp_reset ||
505 !rdi->driver_f.schedule_send ||
506 !rdi->driver_f.get_pmtu_from_attr ||
507 !rdi->driver_f.flush_qp_waiters ||
508 !rdi->driver_f.stop_send_queue ||
509 !rdi->driver_f.quiesce_qp ||
510 !rdi->driver_f.notify_error_qp ||
511 !rdi->driver_f.mtu_from_qp ||
512 !rdi->driver_f.mtu_to_path_mtu)
513 return -EINVAL;
514 break;
515
516 case DESTROY_QP:
517 if (!check_driver_override(rdi, offsetof(struct ib_device,
518 destroy_qp),
519 rvt_destroy_qp))
520 if (!rdi->driver_f.qp_priv_free ||
521 !rdi->driver_f.notify_qp_reset ||
522 !rdi->driver_f.flush_qp_waiters ||
523 !rdi->driver_f.stop_send_queue ||
524 !rdi->driver_f.quiesce_qp)
525 return -EINVAL;
526 break;
527
528 case QUERY_QP:
529 check_driver_override(rdi, offsetof(struct ib_device,
530 query_qp),
531 rvt_query_qp);
532 break;
533
534 case POST_SEND:
535 if (!check_driver_override(rdi, offsetof(struct ib_device,
536 post_send),
537 rvt_post_send))
538 if (!rdi->driver_f.schedule_send ||
539 !rdi->driver_f.do_send ||
540 !rdi->post_parms)
541 return -EINVAL;
542 break;
543
544 case POST_RECV:
545 check_driver_override(rdi, offsetof(struct ib_device,
546 post_recv),
547 rvt_post_recv);
548 break;
549 case POST_SRQ_RECV:
550 check_driver_override(rdi, offsetof(struct ib_device,
551 post_srq_recv),
552 rvt_post_srq_recv);
553 break;
554
555 case CREATE_AH:
556 check_driver_override(rdi, offsetof(struct ib_device,
557 create_ah),
558 rvt_create_ah);
559 break;
560
561 case DESTROY_AH:
562 check_driver_override(rdi, offsetof(struct ib_device,
563 destroy_ah),
564 rvt_destroy_ah);
565 break;
566
567 case MODIFY_AH:
568 check_driver_override(rdi, offsetof(struct ib_device,
569 modify_ah),
570 rvt_modify_ah);
571 break;
572
573 case QUERY_AH:
574 check_driver_override(rdi, offsetof(struct ib_device,
575 query_ah),
576 rvt_query_ah);
577 break;
578
579 case CREATE_SRQ:
580 check_driver_override(rdi, offsetof(struct ib_device,
581 create_srq),
582 rvt_create_srq);
583 break;
584
585 case MODIFY_SRQ:
586 check_driver_override(rdi, offsetof(struct ib_device,
587 modify_srq),
588 rvt_modify_srq);
589 break;
590
591 case DESTROY_SRQ:
592 check_driver_override(rdi, offsetof(struct ib_device,
593 destroy_srq),
594 rvt_destroy_srq);
595 break;
596
597 case QUERY_SRQ:
598 check_driver_override(rdi, offsetof(struct ib_device,
599 query_srq),
600 rvt_query_srq);
601 break;
602
603 case ATTACH_MCAST:
604 check_driver_override(rdi, offsetof(struct ib_device,
605 attach_mcast),
606 rvt_attach_mcast);
607 break;
608
609 case DETACH_MCAST:
610 check_driver_override(rdi, offsetof(struct ib_device,
611 detach_mcast),
612 rvt_detach_mcast);
613 break;
614
615 case GET_DMA_MR:
616 check_driver_override(rdi, offsetof(struct ib_device,
617 get_dma_mr),
618 rvt_get_dma_mr);
619 break;
620
621 case REG_USER_MR:
622 check_driver_override(rdi, offsetof(struct ib_device,
623 reg_user_mr),
624 rvt_reg_user_mr);
625 break;
626
627 case DEREG_MR:
628 check_driver_override(rdi, offsetof(struct ib_device,
629 dereg_mr),
630 rvt_dereg_mr);
631 break;
632
633 case ALLOC_FMR:
634 check_driver_override(rdi, offsetof(struct ib_device,
635 alloc_fmr),
636 rvt_alloc_fmr);
637 break;
638
639 case ALLOC_MR:
640 check_driver_override(rdi, offsetof(struct ib_device,
641 alloc_mr),
642 rvt_alloc_mr);
643 break;
644
645 case MAP_MR_SG:
646 check_driver_override(rdi, offsetof(struct ib_device,
647 map_mr_sg),
648 rvt_map_mr_sg);
649 break;
650
651 case MAP_PHYS_FMR:
652 check_driver_override(rdi, offsetof(struct ib_device,
653 map_phys_fmr),
654 rvt_map_phys_fmr);
655 break;
656
657 case UNMAP_FMR:
658 check_driver_override(rdi, offsetof(struct ib_device,
659 unmap_fmr),
660 rvt_unmap_fmr);
661 break;
662
663 case DEALLOC_FMR:
664 check_driver_override(rdi, offsetof(struct ib_device,
665 dealloc_fmr),
666 rvt_dealloc_fmr);
667 break;
668
669 case MMAP:
670 check_driver_override(rdi, offsetof(struct ib_device,
671 mmap),
672 rvt_mmap);
673 break;
674
675 case CREATE_CQ:
676 check_driver_override(rdi, offsetof(struct ib_device,
677 create_cq),
678 rvt_create_cq);
679 break;
680
681 case DESTROY_CQ:
682 check_driver_override(rdi, offsetof(struct ib_device,
683 destroy_cq),
684 rvt_destroy_cq);
685 break;
686
687 case POLL_CQ:
688 check_driver_override(rdi, offsetof(struct ib_device,
689 poll_cq),
690 rvt_poll_cq);
691 break;
692
693 case REQ_NOTFIY_CQ:
694 check_driver_override(rdi, offsetof(struct ib_device,
695 req_notify_cq),
696 rvt_req_notify_cq);
697 break;
698
699 case RESIZE_CQ:
700 check_driver_override(rdi, offsetof(struct ib_device,
701 resize_cq),
702 rvt_resize_cq);
703 break;
704
705 case ALLOC_PD:
706 check_driver_override(rdi, offsetof(struct ib_device,
707 alloc_pd),
708 rvt_alloc_pd);
709 break;
710
711 case DEALLOC_PD:
712 check_driver_override(rdi, offsetof(struct ib_device,
713 dealloc_pd),
714 rvt_dealloc_pd);
715 break;
716
717 default:
718 return -EINVAL;
719 }
720
721 return 0;
722}
723
724/**
725 * rvt_register_device - register a driver
726 * @rdi: main dev structure for all of rdmavt operations
727 *
728 * It is up to drivers to allocate the rdi and fill in the appropriate
729 * information.
730 *
731 * Return: 0 on success otherwise an errno.
732 */
733int rvt_register_device(struct rvt_dev_info *rdi, u32 driver_id)
734{
735 int ret = 0, i;
736
737 if (!rdi)
738 return -EINVAL;
739
740 /*
741 * Check to ensure drivers have setup the required helpers for the verbs
742 * they want rdmavt to handle
743 */
744 for (i = 0; i < _VERB_IDX_MAX; i++)
745 if (check_support(rdi, i)) {
746 pr_err("Driver support req not met at %d\n", i);
747 return -EINVAL;
748 }
749
750
751 /* Once we get past here we can use rvt_pr macros and tracepoints */
752 trace_rvt_dbg(rdi, "Driver attempting registration");
753 rvt_mmap_init(rdi);
754
755 /* Queue Pairs */
756 ret = rvt_driver_qp_init(rdi);
757 if (ret) {
758 pr_err("Error in driver QP init.\n");
759 return -EINVAL;
760 }
761
762 /* Address Handle */
763 spin_lock_init(&rdi->n_ahs_lock);
764 rdi->n_ahs_allocated = 0;
765
766 /* Shared Receive Queue */
767 rvt_driver_srq_init(rdi);
768
769 /* Multicast */
770 rvt_driver_mcast_init(rdi);
771
772 /* Mem Region */
773 ret = rvt_driver_mr_init(rdi);
774 if (ret) {
775 pr_err("Error in driver MR init.\n");
776 goto bail_no_mr;
777 }
778
779 /* Completion queues */
780 ret = rvt_driver_cq_init(rdi);
781 if (ret) {
782 pr_err("Error in driver CQ init.\n");
783 goto bail_mr;
784 }
785
786 /* DMA Operations */
787 rdi->ibdev.dev.dma_ops = rdi->ibdev.dev.dma_ops ? : &dma_virt_ops;
788
789 /* Protection Domain */
790 spin_lock_init(&rdi->n_pds_lock);
791 rdi->n_pds_allocated = 0;
792
793 /*
794 * There are some things which could be set by underlying drivers but
795 * really should be up to rdmavt to set. For instance drivers can't know
796 * exactly which functions rdmavt supports, nor do they know the ABI
797 * version, so we do all of this sort of stuff here.
798 */
799 rdi->ibdev.uverbs_abi_ver = RVT_UVERBS_ABI_VERSION;
800 rdi->ibdev.uverbs_cmd_mask =
801 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
802 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
803 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
804 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
805 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
806 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
807 (1ull << IB_USER_VERBS_CMD_MODIFY_AH) |
808 (1ull << IB_USER_VERBS_CMD_QUERY_AH) |
809 (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
810 (1ull << IB_USER_VERBS_CMD_REG_MR) |
811 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
812 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
813 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
814 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
815 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
816 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
817 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
818 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
819 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
820 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
821 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
822 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
823 (1ull << IB_USER_VERBS_CMD_POST_RECV) |
824 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
825 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
826 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
827 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
828 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
829 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
830 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
831 rdi->ibdev.node_type = RDMA_NODE_IB_CA;
832 rdi->ibdev.num_comp_vectors = 1;
833
834 rdi->ibdev.driver_id = driver_id;
835 /* We are now good to announce we exist */
836 ret = ib_register_device(&rdi->ibdev, rdi->driver_f.port_callback);
837 if (ret) {
838 rvt_pr_err(rdi, "Failed to register driver with ib core.\n");
839 goto bail_cq;
840 }
841
842 rvt_create_mad_agents(rdi);
843
844 rvt_pr_info(rdi, "Registration with rdmavt done.\n");
845 return ret;
846
847bail_cq:
848 rvt_cq_exit(rdi);
849
850bail_mr:
851 rvt_mr_exit(rdi);
852
853bail_no_mr:
854 rvt_qp_exit(rdi);
855
856 return ret;
857}
858EXPORT_SYMBOL(rvt_register_device);
859
860/**
861 * rvt_unregister_device - remove a driver
862 * @rdi: rvt dev struct
863 */
864void rvt_unregister_device(struct rvt_dev_info *rdi)
865{
866 trace_rvt_dbg(rdi, "Driver is unregistering.");
867 if (!rdi)
868 return;
869
870 rvt_free_mad_agents(rdi);
871
872 ib_unregister_device(&rdi->ibdev);
873 rvt_cq_exit(rdi);
874 rvt_mr_exit(rdi);
875 rvt_qp_exit(rdi);
876}
877EXPORT_SYMBOL(rvt_unregister_device);
878
879/**
880 * rvt_init_port - init internal data for driver port
881 * @rdi: rvt dev strut
882 * @port: rvt port
883 * @port_index: 0 based index of ports, different from IB core port num
884 *
885 * Keep track of a list of ports. No need to have a detach port.
886 * They persist until the driver goes away.
887 *
888 * Return: always 0
889 */
890int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
891 int port_index, u16 *pkey_table)
892{
893
894 rdi->ports[port_index] = port;
895 rdi->ports[port_index]->pkey_table = pkey_table;
896
897 return 0;
898}
899EXPORT_SYMBOL(rvt_init_port);