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Merge branches 'acpi-ec', 'acpi-video', 'acpi-button' and 'acpi-thermal'
[linux-2.6-block.git] / drivers / infiniband / sw / rdmavt / vt.c
CommitLineData
0194621b 1/*
fe314195 2 * Copyright(c) 2016 Intel Corporation.
0194621b
DD		 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 "vt.h"
81ba39a8 51#include "trace.h"
0194621b 52
182285d0
DD		 53#define RVT_UVERBS_ABI_VERSION 2
54
0194621b
DD		 55MODULE_LICENSE("Dual BSD/GPL");
56MODULE_DESCRIPTION("RDMA Verbs Transport Library");
57
58static int rvt_init(void)
59{
90793f71
DD		 60 /*
61 * rdmavt does not need to do anything special when it starts up. All it
62 * needs to do is sit and wait until a driver attempts registration.
63 */
0194621b
DD		 64 return 0;
65}
66module_init(rvt_init);
67
68static void rvt_cleanup(void)
69{
90793f71
DD		 70 /*
71 * Nothing to do at exit time either. The module won't be able to be
72 * removed until all drivers are gone which means all the dev structs
73 * are gone so there is really nothing to do.
74 */
0194621b
DD		 75}
76module_exit(rvt_cleanup);
77
90793f71
DD		 78/**
79 * rvt_alloc_device - allocate rdi
80 * @size: how big of a structure to allocate
81 * @nports: number of ports to allocate array slots for
82 *
83 * Use IB core device alloc to allocate space for the rdi which is assumed to be
84 * inside of the ib_device. Any extra space that drivers require should be
85 * included in size.
86 *
87 * We also allocate a port array based on the number of ports.
88 *
89 * Return: pointer to allocated rdi
90 */
ff6acd69
DD		 91struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)
92{
93 struct rvt_dev_info *rdi = ERR_PTR(-ENOMEM);
94
95 rdi = (struct rvt_dev_info *)ib_alloc_device(size);
96 if (!rdi)
97 return rdi;
98
99 rdi->ports = kcalloc(nports,
100 sizeof(struct rvt_ibport **),
101 GFP_KERNEL);
102 if (!rdi->ports)
103 ib_dealloc_device(&rdi->ibdev);
104
105 return rdi;
106}
107EXPORT_SYMBOL(rvt_alloc_device);
108
ea0e4ce3
JJ		 109/**
110 * rvt_dealloc_device - deallocate rdi
111 * @rdi: structure to free
112 *
113 * Free a structure allocated with rvt_alloc_device()
114 */
115void rvt_dealloc_device(struct rvt_dev_info *rdi)
116{
117 kfree(rdi->ports);
118 ib_dealloc_device(&rdi->ibdev);
119}
120EXPORT_SYMBOL(rvt_dealloc_device);
121
19ef1edd
DD		 122static int rvt_query_device(struct ib_device *ibdev,
123 struct ib_device_attr *props,
124 struct ib_udata *uhw)
125{
feaeb6e2
HC		 126 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
127
128 if (uhw->inlen || uhw->outlen)
129 return -EINVAL;
19ef1edd 130 /*
feaeb6e2 131 * Return rvt_dev_info.dparms.props contents
19ef1edd 132 */
feaeb6e2
HC		 133 *props = rdi->dparms.props;
134 return 0;
19ef1edd
DD		 135}
136
137static int rvt_modify_device(struct ib_device *device,
138 int device_modify_mask,
139 struct ib_device_modify *device_modify)
140{
141 /*
90793f71
DD		 142 * There is currently no need to supply this based on qib and hfi1.
143 * Future drivers may need to implement this though.
19ef1edd
DD		 144 */
145
19ef1edd
DD		 146 return -EOPNOTSUPP;
147}
148
765525c1
DD		 149/**
150 * rvt_query_port: Passes the query port call to the driver
151 * @ibdev: Verbs IB dev
f1badc71 152 * @port_num: port number, 1 based from ib core
765525c1
DD		 153 * @props: structure to hold returned properties
154 *
90793f71 155 * Return: 0 on success
765525c1 156 */
f1badc71 157static int rvt_query_port(struct ib_device *ibdev, u8 port_num,
765525c1
DD		 158 struct ib_port_attr *props)
159{
61a650c1
HC		 160 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
161 struct rvt_ibport *rvp;
162 int port_index = ibport_num_to_idx(ibdev, port_num);
163
164 if (port_index < 0)
f1badc71
DD		 165 return -EINVAL;
166
61a650c1
HC		 167 rvp = rdi->ports[port_index];
168 memset(props, 0, sizeof(*props));
169 props->sm_lid = rvp->sm_lid;
170 props->sm_sl = rvp->sm_sl;
171 props->port_cap_flags = rvp->port_cap_flags;
172 props->max_msg_sz = 0x80000000;
173 props->pkey_tbl_len = rvt_get_npkeys(rdi);
174 props->bad_pkey_cntr = rvp->pkey_violations;
175 props->qkey_viol_cntr = rvp->qkey_violations;
176 props->subnet_timeout = rvp->subnet_timeout;
177 props->init_type_reply = 0;
178
179 /* Populate the remaining ib_port_attr elements */
180 return rdi->driver_f.query_port_state(rdi, port_num, props);
765525c1
DD		 181}
182
183/**
184 * rvt_modify_port
185 * @ibdev: Verbs IB dev
f1badc71 186 * @port_num: Port number, 1 based from ib core
765525c1
DD		 187 * @port_modify_mask: How to change the port
188 * @props: Structure to fill in
189 *
90793f71 190 * Return: 0 on success
765525c1 191 */
f1badc71 192static int rvt_modify_port(struct ib_device *ibdev, u8 port_num,
765525c1
DD		 193 int port_modify_mask, struct ib_port_modify *props)
194{
61a650c1
HC		 195 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
196 struct rvt_ibport *rvp;
197 int ret = 0;
198 int port_index = ibport_num_to_idx(ibdev, port_num);
199
200 if (port_index < 0)
f1badc71
DD		 201 return -EINVAL;
202
61a650c1
HC		 203 rvp = rdi->ports[port_index];
204 rvp->port_cap_flags |= props->set_port_cap_mask;
205 rvp->port_cap_flags &= ~props->clr_port_cap_mask;
206
207 if (props->set_port_cap_mask || props->clr_port_cap_mask)
208 rdi->driver_f.cap_mask_chg(rdi, port_num);
209 if (port_modify_mask & IB_PORT_SHUTDOWN)
210 ret = rdi->driver_f.shut_down_port(rdi, port_num);
211 if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
212 rvp->qkey_violations = 0;
213
214 return ret;
765525c1
DD		 215}
216
30588643
DD		 217/**
218 * rvt_query_pkey - Return a pkey from the table at a given index
219 * @ibdev: Verbs IB dev
f1badc71 220 * @port_num: Port number, 1 based from ib core
30588643
DD		 221 * @intex: Index into pkey table
222 *
90793f71 223 * Return: 0 on failure pkey otherwise
30588643 224 */
f1badc71 225static int rvt_query_pkey(struct ib_device *ibdev, u8 port_num, u16 index,
30588643
DD		 226 u16 *pkey)
227{
228 /*
229 * Driver will be responsible for keeping rvt_dev_info.pkey_table up to
230 * date. This function will just return that value. There is no need to
231 * lock, if a stale value is read and sent to the user so be it there is
232 * no way to protect against that anyway.
233 */
38ce2c6f
DD		 234 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
235 int port_index;
236
f1badc71
DD		 237 port_index = ibport_num_to_idx(ibdev, port_num);
238 if (port_index < 0)
38ce2c6f
DD		 239 return -EINVAL;
240
f1badc71 241 if (index >= rvt_get_npkeys(rdi))
38ce2c6f
DD		 242 return -EINVAL;
243
244 *pkey = rvt_get_pkey(rdi, port_index, index);
30588643
DD		 245 return 0;
246}
247
2d092e11
DD		 248/**
249 * rvt_query_gid - Return a gid from the table
250 * @ibdev: Verbs IB dev
f1badc71 251 * @port_num: Port number, 1 based from ib core
2d092e11
DD		 252 * @index: = Index in table
253 * @gid: Gid to return
254 *
90793f71 255 * Return: 0 on success
2d092e11 256 */
f1badc71 257static int rvt_query_gid(struct ib_device *ibdev, u8 port_num,
1f024992 258 int guid_index, union ib_gid *gid)
2d092e11 259{
1f024992
DD		 260 struct rvt_dev_info *rdi;
261 struct rvt_ibport *rvp;
262 int port_index;
263
2d092e11
DD		 264 /*
265 * Driver is responsible for updating the guid table. Which will be used
266 * to craft the return value. This will work similar to how query_pkey()
267 * is being done.
268 */
1f024992
DD		 269 port_index = ibport_num_to_idx(ibdev, port_num);
270 if (port_index < 0)
f1badc71 271 return -EINVAL;
2d092e11 272
1f024992
DD		 273 rdi = ib_to_rvt(ibdev);
274 rvp = rdi->ports[port_index];
275
276 gid->global.subnet_prefix = rvp->gid_prefix;
277
278 return rdi->driver_f.get_guid_be(rdi, rvp, guid_index,
279 &gid->global.interface_id);
2d092e11
DD		 280}
281
6c43cf4b
HC		 282struct rvt_ucontext {
283 struct ib_ucontext ibucontext;
284};
285
286static inline struct rvt_ucontext *to_iucontext(struct ib_ucontext
287 *ibucontext)
288{
289 return container_of(ibucontext, struct rvt_ucontext, ibucontext);
290}
291
c4ed7d8b
DD		 292/**
293 * rvt_alloc_ucontext - Allocate a user context
294 * @ibdev: Vers IB dev
295 * @data: User data allocated
296 */
297static struct ib_ucontext *rvt_alloc_ucontext(struct ib_device *ibdev,
298 struct ib_udata *udata)
299{
6c43cf4b
HC		 300 struct rvt_ucontext *context;
301
302 context = kmalloc(sizeof(*context), GFP_KERNEL);
303 if (!context)
304 return ERR_PTR(-ENOMEM);
305 return &context->ibucontext;
c4ed7d8b
DD		 306}
307
308/**
309 *rvt_dealloc_ucontext - Free a user context
310 *@context - Free this
311 */
312static int rvt_dealloc_ucontext(struct ib_ucontext *context)
313{
6c43cf4b
HC		 314 kfree(to_iucontext(context));
315 return 0;
c4ed7d8b
DD		 316}
317
e6a8818a
DD		 318static int rvt_get_port_immutable(struct ib_device *ibdev, u8 port_num,
319 struct ib_port_immutable *immutable)
320{
61a650c1
HC		 321 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
322 struct ib_port_attr attr;
323 int err, port_index;
324
325 port_index = ibport_num_to_idx(ibdev, port_num);
326 if (port_index < 0)
327 return -EINVAL;
328
329 err = rvt_query_port(ibdev, port_num, &attr);
330 if (err)
331 return err;
332
333 immutable->pkey_tbl_len = attr.pkey_tbl_len;
334 immutable->gid_tbl_len = attr.gid_tbl_len;
335 immutable->core_cap_flags = rdi->dparms.core_cap_flags;
336 immutable->max_mad_size = rdi->dparms.max_mad_size;
337
338 return 0;
e6a8818a
DD		 339}
340
1348d706
DD		 341enum {
342 MISC,
343 QUERY_DEVICE,
344 MODIFY_DEVICE,
345 QUERY_PORT,
346 MODIFY_PORT,
347 QUERY_PKEY,
348 QUERY_GID,
349 ALLOC_UCONTEXT,
350 DEALLOC_UCONTEXT,
351 GET_PORT_IMMUTABLE,
352 CREATE_QP,
353 MODIFY_QP,
354 DESTROY_QP,
355 QUERY_QP,
356 POST_SEND,
357 POST_RECV,
358 POST_SRQ_RECV,
359 CREATE_AH,
360 DESTROY_AH,
361 MODIFY_AH,
362 QUERY_AH,
363 CREATE_SRQ,
364 MODIFY_SRQ,
365 DESTROY_SRQ,
366 QUERY_SRQ,
367 ATTACH_MCAST,
368 DETACH_MCAST,
369 GET_DMA_MR,
370 REG_USER_MR,
371 DEREG_MR,
372 ALLOC_MR,
373 ALLOC_FMR,
374 MAP_PHYS_FMR,
375 UNMAP_FMR,
376 DEALLOC_FMR,
377 MMAP,
378 CREATE_CQ,
379 DESTROY_CQ,
380 POLL_CQ,
381 REQ_NOTFIY_CQ,
382 RESIZE_CQ,
383 ALLOC_PD,
384 DEALLOC_PD,
385 _VERB_IDX_MAX /* Must always be last! */
386};
387
388static inline int check_driver_override(struct rvt_dev_info *rdi,
389 size_t offset, void *func)
390{
391 if (!*(void **)((void *)&rdi->ibdev + offset)) {
392 *(void **)((void *)&rdi->ibdev + offset) = func;
393 return 0;
394 }
395
396 return 1;
397}
398
9debaaec 399static noinline int check_support(struct rvt_dev_info *rdi, int verb)
1348d706
DD		 400{
401 switch (verb) {
402 case MISC:
403 /*
404 * These functions are not part of verbs specifically but are
405 * required for rdmavt to function.
406 */
407 if ((!rdi->driver_f.port_callback) ||
408 (!rdi->driver_f.get_card_name) ||
409 (!rdi->driver_f.get_pci_dev))
410 return -EINVAL;
411 break;
412
413 case QUERY_DEVICE:
414 check_driver_override(rdi, offsetof(struct ib_device,
415 query_device),
416 rvt_query_device);
417 break;
418
419 case MODIFY_DEVICE:
420 /*
421 * rdmavt does not support modify device currently drivers must
422 * provide.
423 */
424 if (!check_driver_override(rdi, offsetof(struct ib_device,
425 modify_device),
426 rvt_modify_device))
427 return -EOPNOTSUPP;
428 break;
429
430 case QUERY_PORT:
431 if (!check_driver_override(rdi, offsetof(struct ib_device,
432 query_port),
433 rvt_query_port))
434 if (!rdi->driver_f.query_port_state)
435 return -EINVAL;
436 break;
437
438 case MODIFY_PORT:
439 if (!check_driver_override(rdi, offsetof(struct ib_device,
440 modify_port),
441 rvt_modify_port))
442 if (!rdi->driver_f.cap_mask_chg ||
443 !rdi->driver_f.shut_down_port)
444 return -EINVAL;
445 break;
446
447 case QUERY_PKEY:
448 check_driver_override(rdi, offsetof(struct ib_device,
449 query_pkey),
450 rvt_query_pkey);
451 break;
452
453 case QUERY_GID:
454 if (!check_driver_override(rdi, offsetof(struct ib_device,
455 query_gid),
456 rvt_query_gid))
457 if (!rdi->driver_f.get_guid_be)
458 return -EINVAL;
459 break;
460
461 case ALLOC_UCONTEXT:
462 check_driver_override(rdi, offsetof(struct ib_device,
463 alloc_ucontext),
464 rvt_alloc_ucontext);
465 break;
466
467 case DEALLOC_UCONTEXT:
468 check_driver_override(rdi, offsetof(struct ib_device,
469 dealloc_ucontext),
470 rvt_dealloc_ucontext);
471 break;
472
473 case GET_PORT_IMMUTABLE:
474 check_driver_override(rdi, offsetof(struct ib_device,
475 get_port_immutable),
476 rvt_get_port_immutable);
477 break;
478
479 case CREATE_QP:
480 if (!check_driver_override(rdi, offsetof(struct ib_device,
481 create_qp),
482 rvt_create_qp))
483 if (!rdi->driver_f.qp_priv_alloc ||
484 !rdi->driver_f.qp_priv_free ||
485 !rdi->driver_f.notify_qp_reset ||
486 !rdi->driver_f.flush_qp_waiters ||
487 !rdi->driver_f.stop_send_queue ||
488 !rdi->driver_f.quiesce_qp)
489 return -EINVAL;
490 break;
491
492 case MODIFY_QP:
493 if (!check_driver_override(rdi, offsetof(struct ib_device,
494 modify_qp),
495 rvt_modify_qp))
496 if (!rdi->driver_f.notify_qp_reset ||
497 !rdi->driver_f.schedule_send ||
498 !rdi->driver_f.get_pmtu_from_attr ||
499 !rdi->driver_f.flush_qp_waiters ||
500 !rdi->driver_f.stop_send_queue ||
501 !rdi->driver_f.quiesce_qp ||
502 !rdi->driver_f.notify_error_qp ||
503 !rdi->driver_f.mtu_from_qp ||
96605672 504 !rdi->driver_f.mtu_to_path_mtu)
1348d706
DD		 505 return -EINVAL;
506 break;
507
508 case DESTROY_QP:
509 if (!check_driver_override(rdi, offsetof(struct ib_device,
510 destroy_qp),
511 rvt_destroy_qp))
512 if (!rdi->driver_f.qp_priv_free ||
513 !rdi->driver_f.notify_qp_reset ||
514 !rdi->driver_f.flush_qp_waiters ||
515 !rdi->driver_f.stop_send_queue ||
516 !rdi->driver_f.quiesce_qp)
517 return -EINVAL;
518 break;
519
520 case QUERY_QP:
521 check_driver_override(rdi, offsetof(struct ib_device,
522 query_qp),
523 rvt_query_qp);
524 break;
525
526 case POST_SEND:
527 if (!check_driver_override(rdi, offsetof(struct ib_device,
528 post_send),
529 rvt_post_send))
530 if (!rdi->driver_f.schedule_send ||
531 !rdi->driver_f.do_send)
532 return -EINVAL;
533 break;
534
535 case POST_RECV:
536 check_driver_override(rdi, offsetof(struct ib_device,
537 post_recv),
538 rvt_post_recv);
539 break;
540 case POST_SRQ_RECV:
541 check_driver_override(rdi, offsetof(struct ib_device,
542 post_srq_recv),
543 rvt_post_srq_recv);
544 break;
545
546 case CREATE_AH:
547 check_driver_override(rdi, offsetof(struct ib_device,
548 create_ah),
549 rvt_create_ah);
550 break;
551
552 case DESTROY_AH:
553 check_driver_override(rdi, offsetof(struct ib_device,
554 destroy_ah),
555 rvt_destroy_ah);
556 break;
557
558 case MODIFY_AH:
559 check_driver_override(rdi, offsetof(struct ib_device,
560 modify_ah),
561 rvt_modify_ah);
562 break;
563
564 case QUERY_AH:
565 check_driver_override(rdi, offsetof(struct ib_device,
566 query_ah),
567 rvt_query_ah);
568 break;
569
570 case CREATE_SRQ:
571 check_driver_override(rdi, offsetof(struct ib_device,
572 create_srq),
573 rvt_create_srq);
574 break;
575
576 case MODIFY_SRQ:
577 check_driver_override(rdi, offsetof(struct ib_device,
578 modify_srq),
579 rvt_modify_srq);
580 break;
581
582 case DESTROY_SRQ:
583 check_driver_override(rdi, offsetof(struct ib_device,
584 destroy_srq),
585 rvt_destroy_srq);
586 break;
587
588 case QUERY_SRQ:
589 check_driver_override(rdi, offsetof(struct ib_device,
590 query_srq),
591 rvt_query_srq);
592 break;
593
594 case ATTACH_MCAST:
595 check_driver_override(rdi, offsetof(struct ib_device,
596 attach_mcast),
597 rvt_attach_mcast);
598 break;
599
600 case DETACH_MCAST:
601 check_driver_override(rdi, offsetof(struct ib_device,
602 detach_mcast),
603 rvt_detach_mcast);
604 break;
605
606 case GET_DMA_MR:
607 check_driver_override(rdi, offsetof(struct ib_device,
608 get_dma_mr),
609 rvt_get_dma_mr);
610 break;
611
612 case REG_USER_MR:
613 check_driver_override(rdi, offsetof(struct ib_device,
614 reg_user_mr),
615 rvt_reg_user_mr);
616 break;
617
618 case DEREG_MR:
619 check_driver_override(rdi, offsetof(struct ib_device,
620 dereg_mr),
621 rvt_dereg_mr);
622 break;
623
624 case ALLOC_FMR:
625 check_driver_override(rdi, offsetof(struct ib_device,
626 alloc_fmr),
627 rvt_alloc_fmr);
628 break;
629
630 case ALLOC_MR:
631 check_driver_override(rdi, offsetof(struct ib_device,
632 alloc_mr),
633 rvt_alloc_mr);
634 break;
635
636 case MAP_PHYS_FMR:
637 check_driver_override(rdi, offsetof(struct ib_device,
638 map_phys_fmr),
639 rvt_map_phys_fmr);
640 break;
641
642 case UNMAP_FMR:
643 check_driver_override(rdi, offsetof(struct ib_device,
644 unmap_fmr),
645 rvt_unmap_fmr);
646 break;
647
648 case DEALLOC_FMR:
649 check_driver_override(rdi, offsetof(struct ib_device,
650 dealloc_fmr),
651 rvt_dealloc_fmr);
652 break;
653
654 case MMAP:
655 check_driver_override(rdi, offsetof(struct ib_device,
656 mmap),
657 rvt_mmap);
658 break;
659
660 case CREATE_CQ:
661 check_driver_override(rdi, offsetof(struct ib_device,
662 create_cq),
663 rvt_create_cq);
664 break;
665
666 case DESTROY_CQ:
667 check_driver_override(rdi, offsetof(struct ib_device,
668 destroy_cq),
669 rvt_destroy_cq);
670 break;
671
672 case POLL_CQ:
673 check_driver_override(rdi, offsetof(struct ib_device,
674 poll_cq),
675 rvt_poll_cq);
676 break;
677
678 case REQ_NOTFIY_CQ:
679 check_driver_override(rdi, offsetof(struct ib_device,
680 req_notify_cq),
681 rvt_req_notify_cq);
682 break;
683
684 case RESIZE_CQ:
685 check_driver_override(rdi, offsetof(struct ib_device,
686 resize_cq),
687 rvt_resize_cq);
688 break;
689
690 case ALLOC_PD:
691 check_driver_override(rdi, offsetof(struct ib_device,
692 alloc_pd),
693 rvt_alloc_pd);
694 break;
695
696 case DEALLOC_PD:
697 check_driver_override(rdi, offsetof(struct ib_device,
698 dealloc_pd),
699 rvt_dealloc_pd);
700 break;
701
702 default:
703 return -EINVAL;
704 }
705
706 return 0;
707}
4997870a 708
90793f71
DD		 709/**
710 * rvt_register_device - register a driver
711 * @rdi: main dev structure for all of rdmavt operations
712 *
713 * It is up to drivers to allocate the rdi and fill in the appropriate
714 * information.
715 *
716 * Return: 0 on success otherwise an errno.
717 */
0194621b
DD		 718int rvt_register_device(struct rvt_dev_info *rdi)
719{
1348d706 720 int ret = 0, i;
7b1e2099 721
0194621b
DD		 722 if (!rdi)
723 return -EINVAL;
724
1348d706
DD		 725 /*
726 * Check to ensure drivers have setup the required helpers for the verbs
727 * they want rdmavt to handle
728 */
729 for (i = 0; i < _VERB_IDX_MAX; i++)
730 if (check_support(rdi, i)) {
731 pr_err("Driver support req not met at %d\n", i);
732 return -EINVAL;
733 }
734
b534875d 735
81ba39a8
DD		 736 /* Once we get past here we can use rvt_pr macros and tracepoints */
737 trace_rvt_dbg(rdi, "Driver attempting registration");
822514d7 738 rvt_mmap_init(rdi);
b534875d 739
b518d3e6 740 /* Queue Pairs */
0acb0cc7
DD		 741 ret = rvt_driver_qp_init(rdi);
742 if (ret) {
743 pr_err("Error in driver QP init.\n");
744 return -EINVAL;
745 }
746
4c1e4972 747 /* Address Handle */
119a8e70
KH		 748 spin_lock_init(&rdi->n_ahs_lock);
749 rdi->n_ahs_allocated = 0;
4c1e4972 750
aad9158b 751 /* Shared Receive Queue */
b8f881b9 752 rvt_driver_srq_init(rdi);
aad9158b 753
9fa25171 754 /* Multicast */
4e74080b 755 rvt_driver_mcast_init(rdi);
9fa25171 756
2a055eb7 757 /* Mem Region */
7b1e2099
DD		 758 ret = rvt_driver_mr_init(rdi);
759 if (ret) {
36055a06 760 pr_err("Error in driver MR init.\n");
7b1e2099
DD		 761 goto bail_no_mr;
762 }
763
cf16335a 764 /* Completion queues */
6f6387ae
DD		 765 ret = rvt_driver_cq_init(rdi);
766 if (ret) {
767 pr_err("Error in driver CQ init.\n");
768 goto bail_mr;
769 }
cf16335a 770
8afd32eb 771 /* DMA Operations */
c1b332bc
DD		 772 rdi->ibdev.dma_ops =
773 rdi->ibdev.dma_ops ? : &rvt_default_dma_mapping_ops;
774
8afd32eb 775 /* Protection Domain */
8afd32eb
DD		 776 spin_lock_init(&rdi->n_pds_lock);
777 rdi->n_pds_allocated = 0;
778
182285d0
DD		 779 /*
780 * There are some things which could be set by underlying drivers but
781 * really should be up to rdmavt to set. For instance drivers can't know
782 * exactly which functions rdmavt supports, nor do they know the ABI
783 * version, so we do all of this sort of stuff here.
784 */
785 rdi->ibdev.uverbs_abi_ver = RVT_UVERBS_ABI_VERSION;
786 rdi->ibdev.uverbs_cmd_mask =
787 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
788 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
789 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
790 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
791 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
792 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
793 (1ull << IB_USER_VERBS_CMD_MODIFY_AH) |
794 (1ull << IB_USER_VERBS_CMD_QUERY_AH) |
795 (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
796 (1ull << IB_USER_VERBS_CMD_REG_MR) |
797 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
798 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
799 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
800 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
801 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
802 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
803 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
804 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
805 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
806 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
807 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
808 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
809 (1ull << IB_USER_VERBS_CMD_POST_RECV) |
810 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
811 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
812 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
813 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
814 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
815 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
816 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
817 rdi->ibdev.node_type = RDMA_NODE_IB_CA;
818 rdi->ibdev.num_comp_vectors = 1;
819
7b1e2099
DD		 820 /* We are now good to announce we exist */
821 ret = ib_register_device(&rdi->ibdev, rdi->driver_f.port_callback);
822 if (ret) {
823 rvt_pr_err(rdi, "Failed to register driver with ib core.\n");
6f6387ae 824 goto bail_cq;
7b1e2099
DD		 825 }
826
3711baf2
DD		 827 rvt_create_mad_agents(rdi);
828
b534875d 829 rvt_pr_info(rdi, "Registration with rdmavt done.\n");
7b1e2099 830 return ret;
aec57787 831
6f6387ae
DD		 832bail_cq:
833 rvt_cq_exit(rdi);
834
7b1e2099
DD		 835bail_mr:
836 rvt_mr_exit(rdi);
837
838bail_no_mr:
0acb0cc7
DD		 839 rvt_qp_exit(rdi);
840
7b1e2099 841 return ret;
0194621b
DD		 842}
843EXPORT_SYMBOL(rvt_register_device);
844
90793f71
DD		 845/**
846 * rvt_unregister_device - remove a driver
847 * @rdi: rvt dev struct
848 */
0194621b
DD		 849void rvt_unregister_device(struct rvt_dev_info *rdi)
850{
81ba39a8 851 trace_rvt_dbg(rdi, "Driver is unregistering.");
0194621b
DD		 852 if (!rdi)
853 return;
854
3711baf2
DD		 855 rvt_free_mad_agents(rdi);
856
0194621b 857 ib_unregister_device(&rdi->ibdev);
6f6387ae 858 rvt_cq_exit(rdi);
7b1e2099 859 rvt_mr_exit(rdi);
515667f8 860 rvt_qp_exit(rdi);
0194621b
DD		 861}
862EXPORT_SYMBOL(rvt_unregister_device);
f3d01bbc 863
90793f71
DD		 864/**
865 * rvt_init_port - init internal data for driver port
866 * @rdi: rvt dev strut
867 * @port: rvt port
868 * @port_index: 0 based index of ports, different from IB core port num
869 *
f3d01bbc
DD		 870 * Keep track of a list of ports. No need to have a detach port.
871 * They persist until the driver goes away.
90793f71
DD		 872 *
873 * Return: always 0
f3d01bbc 874 */
38ce2c6f 875int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
f1badc71 876 int port_index, u16 *pkey_table)
f3d01bbc 877{
38ce2c6f 878
f1badc71
DD		 879 rdi->ports[port_index] = port;
880 rdi->ports[port_index]->pkey_table = pkey_table;
38ce2c6f
DD		 881
882 return 0;
f3d01bbc 883}
38ce2c6f 884EXPORT_SYMBOL(rvt_init_port);
Linux 6.x block layer and io_uring tree(s)