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47
48#include <linux/module.h>
49#include <linux/kernel.h>
50#include <linux/dma-mapping.h>
51#include "vt.h"
52#include "cq.h"
53#include "trace.h"
54
55#define RVT_UVERBS_ABI_VERSION 2
56
57MODULE_LICENSE("Dual BSD/GPL");
58MODULE_DESCRIPTION("RDMA Verbs Transport Library");
59
60static int rvt_init(void)
61{
62 int ret = rvt_driver_cq_init();
63
64 if (ret)
65 pr_err("Error in driver CQ init.\n");
66
67 return ret;
68}
69module_init(rvt_init);
70
71static void rvt_cleanup(void)
72{
73 rvt_cq_exit();
74}
75module_exit(rvt_cleanup);
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)
91{
92 struct rvt_dev_info *rdi;
93
94 rdi = (struct rvt_dev_info *)ib_alloc_device(size);
95 if (!rdi)
96 return rdi;
97
98 rdi->ports = kcalloc(nports,
99 sizeof(struct rvt_ibport **),
100 GFP_KERNEL);
101 if (!rdi->ports)
102 ib_dealloc_device(&rdi->ibdev);
103
104 return rdi;
105}
106EXPORT_SYMBOL(rvt_alloc_device);
107
108
109
110
111
112
113
114void rvt_dealloc_device(struct rvt_dev_info *rdi)
115{
116 kfree(rdi->ports);
117 ib_dealloc_device(&rdi->ibdev);
118}
119EXPORT_SYMBOL(rvt_dealloc_device);
120
121static int rvt_query_device(struct ib_device *ibdev,
122 struct ib_device_attr *props,
123 struct ib_udata *uhw)
124{
125 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
126
127 if (uhw->inlen || uhw->outlen)
128 return -EINVAL;
129
130
131
132 *props = rdi->dparms.props;
133 return 0;
134}
135
136static int rvt_modify_device(struct ib_device *device,
137 int device_modify_mask,
138 struct ib_device_modify *device_modify)
139{
140
141
142
143
144
145 return -EOPNOTSUPP;
146}
147
148
149
150
151
152
153
154
155
156static int rvt_query_port(struct ib_device *ibdev, u8 port_num,
157 struct ib_port_attr *props)
158{
159 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
160 struct rvt_ibport *rvp;
161 int port_index = ibport_num_to_idx(ibdev, port_num);
162
163 if (port_index < 0)
164 return -EINVAL;
165
166 rvp = rdi->ports[port_index];
167
168 props->sm_lid = rvp->sm_lid;
169 props->sm_sl = rvp->sm_sl;
170 props->port_cap_flags = rvp->port_cap_flags;
171 props->max_msg_sz = 0x80000000;
172 props->pkey_tbl_len = rvt_get_npkeys(rdi);
173 props->bad_pkey_cntr = rvp->pkey_violations;
174 props->qkey_viol_cntr = rvp->qkey_violations;
175 props->subnet_timeout = rvp->subnet_timeout;
176 props->init_type_reply = 0;
177
178
179 return rdi->driver_f.query_port_state(rdi, port_num, props);
180}
181
182
183
184
185
186
187
188
189
190
191static int rvt_modify_port(struct ib_device *ibdev, u8 port_num,
192 int port_modify_mask, struct ib_port_modify *props)
193{
194 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
195 struct rvt_ibport *rvp;
196 int ret = 0;
197 int port_index = ibport_num_to_idx(ibdev, port_num);
198
199 if (port_index < 0)
200 return -EINVAL;
201
202 rvp = rdi->ports[port_index];
203 if (port_modify_mask & IB_PORT_OPA_MASK_CHG) {
204 rvp->port_cap3_flags |= props->set_port_cap_mask;
205 rvp->port_cap3_flags &= ~props->clr_port_cap_mask;
206 } else {
207 rvp->port_cap_flags |= props->set_port_cap_mask;
208 rvp->port_cap_flags &= ~props->clr_port_cap_mask;
209 }
210
211 if (props->set_port_cap_mask || props->clr_port_cap_mask)
212 rdi->driver_f.cap_mask_chg(rdi, port_num);
213 if (port_modify_mask & IB_PORT_SHUTDOWN)
214 ret = rdi->driver_f.shut_down_port(rdi, port_num);
215 if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
216 rvp->qkey_violations = 0;
217
218 return ret;
219}
220
221
222
223
224
225
226
227
228
229
230static int rvt_query_pkey(struct ib_device *ibdev, u8 port_num, u16 index,
231 u16 *pkey)
232{
233
234
235
236
237
238
239 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
240 int port_index;
241
242 port_index = ibport_num_to_idx(ibdev, port_num);
243 if (port_index < 0)
244 return -EINVAL;
245
246 if (index >= rvt_get_npkeys(rdi))
247 return -EINVAL;
248
249 *pkey = rvt_get_pkey(rdi, port_index, index);
250 return 0;
251}
252
253
254
255
256
257
258
259
260
261
262static int rvt_query_gid(struct ib_device *ibdev, u8 port_num,
263 int guid_index, union ib_gid *gid)
264{
265 struct rvt_dev_info *rdi;
266 struct rvt_ibport *rvp;
267 int port_index;
268
269
270
271
272
273
274 port_index = ibport_num_to_idx(ibdev, port_num);
275 if (port_index < 0)
276 return -EINVAL;
277
278 rdi = ib_to_rvt(ibdev);
279 rvp = rdi->ports[port_index];
280
281 gid->global.subnet_prefix = rvp->gid_prefix;
282
283 return rdi->driver_f.get_guid_be(rdi, rvp, guid_index,
284 &gid->global.interface_id);
285}
286
287struct rvt_ucontext {
288 struct ib_ucontext ibucontext;
289};
290
291static inline struct rvt_ucontext *to_iucontext(struct ib_ucontext
292 *ibucontext)
293{
294 return container_of(ibucontext, struct rvt_ucontext, ibucontext);
295}
296
297
298
299
300
301
302static struct ib_ucontext *rvt_alloc_ucontext(struct ib_device *ibdev,
303 struct ib_udata *udata)
304{
305 struct rvt_ucontext *context;
306
307 context = kmalloc(sizeof(*context), GFP_KERNEL);
308 if (!context)
309 return ERR_PTR(-ENOMEM);
310 return &context->ibucontext;
311}
312
313
314
315
316
317static int rvt_dealloc_ucontext(struct ib_ucontext *context)
318{
319 kfree(to_iucontext(context));
320 return 0;
321}
322
323static int rvt_get_port_immutable(struct ib_device *ibdev, u8 port_num,
324 struct ib_port_immutable *immutable)
325{
326 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
327 struct ib_port_attr attr;
328 int err, port_index;
329
330 port_index = ibport_num_to_idx(ibdev, port_num);
331 if (port_index < 0)
332 return -EINVAL;
333
334 immutable->core_cap_flags = rdi->dparms.core_cap_flags;
335
336 err = ib_query_port(ibdev, port_num, &attr);
337 if (err)
338 return err;
339
340 immutable->pkey_tbl_len = attr.pkey_tbl_len;
341 immutable->gid_tbl_len = attr.gid_tbl_len;
342 immutable->max_mad_size = rdi->dparms.max_mad_size;
343
344 return 0;
345}
346
347enum {
348 MISC,
349 QUERY_DEVICE,
350 MODIFY_DEVICE,
351 QUERY_PORT,
352 MODIFY_PORT,
353 QUERY_PKEY,
354 QUERY_GID,
355 ALLOC_UCONTEXT,
356 DEALLOC_UCONTEXT,
357 GET_PORT_IMMUTABLE,
358 CREATE_QP,
359 MODIFY_QP,
360 DESTROY_QP,
361 QUERY_QP,
362 POST_SEND,
363 POST_RECV,
364 POST_SRQ_RECV,
365 CREATE_AH,
366 DESTROY_AH,
367 MODIFY_AH,
368 QUERY_AH,
369 CREATE_SRQ,
370 MODIFY_SRQ,
371 DESTROY_SRQ,
372 QUERY_SRQ,
373 ATTACH_MCAST,
374 DETACH_MCAST,
375 GET_DMA_MR,
376 REG_USER_MR,
377 DEREG_MR,
378 ALLOC_MR,
379 MAP_MR_SG,
380 ALLOC_FMR,
381 MAP_PHYS_FMR,
382 UNMAP_FMR,
383 DEALLOC_FMR,
384 MMAP,
385 CREATE_CQ,
386 DESTROY_CQ,
387 POLL_CQ,
388 REQ_NOTFIY_CQ,
389 RESIZE_CQ,
390 ALLOC_PD,
391 DEALLOC_PD,
392 _VERB_IDX_MAX
393};
394
395static inline int check_driver_override(struct rvt_dev_info *rdi,
396 size_t offset, void *func)
397{
398 if (!*(void **)((void *)&rdi->ibdev + offset)) {
399 *(void **)((void *)&rdi->ibdev + offset) = func;
400 return 0;
401 }
402
403 return 1;
404}
405
406static noinline int check_support(struct rvt_dev_info *rdi, int verb)
407{
408 switch (verb) {
409 case MISC:
410
411
412
413
414 if ((!rdi->driver_f.port_callback) ||
415 (!rdi->driver_f.get_pci_dev))
416 return -EINVAL;
417 break;
418
419 case QUERY_DEVICE:
420 check_driver_override(rdi, offsetof(struct ib_device,
421 query_device),
422 rvt_query_device);
423 break;
424
425 case MODIFY_DEVICE:
426
427
428
429
430 if (!check_driver_override(rdi, offsetof(struct ib_device,
431 modify_device),
432 rvt_modify_device))
433 return -EOPNOTSUPP;
434 break;
435
436 case QUERY_PORT:
437 if (!check_driver_override(rdi, offsetof(struct ib_device,
438 query_port),
439 rvt_query_port))
440 if (!rdi->driver_f.query_port_state)
441 return -EINVAL;
442 break;
443
444 case MODIFY_PORT:
445 if (!check_driver_override(rdi, offsetof(struct ib_device,
446 modify_port),
447 rvt_modify_port))
448 if (!rdi->driver_f.cap_mask_chg ||
449 !rdi->driver_f.shut_down_port)
450 return -EINVAL;
451 break;
452
453 case QUERY_PKEY:
454 check_driver_override(rdi, offsetof(struct ib_device,
455 query_pkey),
456 rvt_query_pkey);
457 break;
458
459 case QUERY_GID:
460 if (!check_driver_override(rdi, offsetof(struct ib_device,
461 query_gid),
462 rvt_query_gid))
463 if (!rdi->driver_f.get_guid_be)
464 return -EINVAL;
465 break;
466
467 case ALLOC_UCONTEXT:
468 check_driver_override(rdi, offsetof(struct ib_device,
469 alloc_ucontext),
470 rvt_alloc_ucontext);
471 break;
472
473 case DEALLOC_UCONTEXT:
474 check_driver_override(rdi, offsetof(struct ib_device,
475 dealloc_ucontext),
476 rvt_dealloc_ucontext);
477 break;
478
479 case GET_PORT_IMMUTABLE:
480 check_driver_override(rdi, offsetof(struct ib_device,
481 get_port_immutable),
482 rvt_get_port_immutable);
483 break;
484
485 case CREATE_QP:
486 if (!check_driver_override(rdi, offsetof(struct ib_device,
487 create_qp),
488 rvt_create_qp))
489 if (!rdi->driver_f.qp_priv_alloc ||
490 !rdi->driver_f.qp_priv_free ||
491 !rdi->driver_f.notify_qp_reset ||
492 !rdi->driver_f.flush_qp_waiters ||
493 !rdi->driver_f.stop_send_queue ||
494 !rdi->driver_f.quiesce_qp)
495 return -EINVAL;
496 break;
497
498 case MODIFY_QP:
499 if (!check_driver_override(rdi, offsetof(struct ib_device,
500 modify_qp),
501 rvt_modify_qp))
502 if (!rdi->driver_f.notify_qp_reset ||
503 !rdi->driver_f.schedule_send ||
504 !rdi->driver_f.get_pmtu_from_attr ||
505 !rdi->driver_f.flush_qp_waiters ||
506 !rdi->driver_f.stop_send_queue ||
507 !rdi->driver_f.quiesce_qp ||
508 !rdi->driver_f.notify_error_qp ||
509 !rdi->driver_f.mtu_from_qp ||
510 !rdi->driver_f.mtu_to_path_mtu)
511 return -EINVAL;
512 break;
513
514 case DESTROY_QP:
515 if (!check_driver_override(rdi, offsetof(struct ib_device,
516 destroy_qp),
517 rvt_destroy_qp))
518 if (!rdi->driver_f.qp_priv_free ||
519 !rdi->driver_f.notify_qp_reset ||
520 !rdi->driver_f.flush_qp_waiters ||
521 !rdi->driver_f.stop_send_queue ||
522 !rdi->driver_f.quiesce_qp)
523 return -EINVAL;
524 break;
525
526 case QUERY_QP:
527 check_driver_override(rdi, offsetof(struct ib_device,
528 query_qp),
529 rvt_query_qp);
530 break;
531
532 case POST_SEND:
533 if (!check_driver_override(rdi, offsetof(struct ib_device,
534 post_send),
535 rvt_post_send))
536 if (!rdi->driver_f.schedule_send ||
537 !rdi->driver_f.do_send ||
538 !rdi->post_parms)
539 return -EINVAL;
540 break;
541
542 case POST_RECV:
543 check_driver_override(rdi, offsetof(struct ib_device,
544 post_recv),
545 rvt_post_recv);
546 break;
547 case POST_SRQ_RECV:
548 check_driver_override(rdi, offsetof(struct ib_device,
549 post_srq_recv),
550 rvt_post_srq_recv);
551 break;
552
553 case CREATE_AH:
554 check_driver_override(rdi, offsetof(struct ib_device,
555 create_ah),
556 rvt_create_ah);
557 break;
558
559 case DESTROY_AH:
560 check_driver_override(rdi, offsetof(struct ib_device,
561 destroy_ah),
562 rvt_destroy_ah);
563 break;
564
565 case MODIFY_AH:
566 check_driver_override(rdi, offsetof(struct ib_device,
567 modify_ah),
568 rvt_modify_ah);
569 break;
570
571 case QUERY_AH:
572 check_driver_override(rdi, offsetof(struct ib_device,
573 query_ah),
574 rvt_query_ah);
575 break;
576
577 case CREATE_SRQ:
578 check_driver_override(rdi, offsetof(struct ib_device,
579 create_srq),
580 rvt_create_srq);
581 break;
582
583 case MODIFY_SRQ:
584 check_driver_override(rdi, offsetof(struct ib_device,
585 modify_srq),
586 rvt_modify_srq);
587 break;
588
589 case DESTROY_SRQ:
590 check_driver_override(rdi, offsetof(struct ib_device,
591 destroy_srq),
592 rvt_destroy_srq);
593 break;
594
595 case QUERY_SRQ:
596 check_driver_override(rdi, offsetof(struct ib_device,
597 query_srq),
598 rvt_query_srq);
599 break;
600
601 case ATTACH_MCAST:
602 check_driver_override(rdi, offsetof(struct ib_device,
603 attach_mcast),
604 rvt_attach_mcast);
605 break;
606
607 case DETACH_MCAST:
608 check_driver_override(rdi, offsetof(struct ib_device,
609 detach_mcast),
610 rvt_detach_mcast);
611 break;
612
613 case GET_DMA_MR:
614 check_driver_override(rdi, offsetof(struct ib_device,
615 get_dma_mr),
616 rvt_get_dma_mr);
617 break;
618
619 case REG_USER_MR:
620 check_driver_override(rdi, offsetof(struct ib_device,
621 reg_user_mr),
622 rvt_reg_user_mr);
623 break;
624
625 case DEREG_MR:
626 check_driver_override(rdi, offsetof(struct ib_device,
627 dereg_mr),
628 rvt_dereg_mr);
629 break;
630
631 case ALLOC_FMR:
632 check_driver_override(rdi, offsetof(struct ib_device,
633 alloc_fmr),
634 rvt_alloc_fmr);
635 break;
636
637 case ALLOC_MR:
638 check_driver_override(rdi, offsetof(struct ib_device,
639 alloc_mr),
640 rvt_alloc_mr);
641 break;
642
643 case MAP_MR_SG:
644 check_driver_override(rdi, offsetof(struct ib_device,
645 map_mr_sg),
646 rvt_map_mr_sg);
647 break;
648
649 case MAP_PHYS_FMR:
650 check_driver_override(rdi, offsetof(struct ib_device,
651 map_phys_fmr),
652 rvt_map_phys_fmr);
653 break;
654
655 case UNMAP_FMR:
656 check_driver_override(rdi, offsetof(struct ib_device,
657 unmap_fmr),
658 rvt_unmap_fmr);
659 break;
660
661 case DEALLOC_FMR:
662 check_driver_override(rdi, offsetof(struct ib_device,
663 dealloc_fmr),
664 rvt_dealloc_fmr);
665 break;
666
667 case MMAP:
668 check_driver_override(rdi, offsetof(struct ib_device,
669 mmap),
670 rvt_mmap);
671 break;
672
673 case CREATE_CQ:
674 check_driver_override(rdi, offsetof(struct ib_device,
675 create_cq),
676 rvt_create_cq);
677 break;
678
679 case DESTROY_CQ:
680 check_driver_override(rdi, offsetof(struct ib_device,
681 destroy_cq),
682 rvt_destroy_cq);
683 break;
684
685 case POLL_CQ:
686 check_driver_override(rdi, offsetof(struct ib_device,
687 poll_cq),
688 rvt_poll_cq);
689 break;
690
691 case REQ_NOTFIY_CQ:
692 check_driver_override(rdi, offsetof(struct ib_device,
693 req_notify_cq),
694 rvt_req_notify_cq);
695 break;
696
697 case RESIZE_CQ:
698 check_driver_override(rdi, offsetof(struct ib_device,
699 resize_cq),
700 rvt_resize_cq);
701 break;
702
703 case ALLOC_PD:
704 check_driver_override(rdi, offsetof(struct ib_device,
705 alloc_pd),
706 rvt_alloc_pd);
707 break;
708
709 case DEALLOC_PD:
710 check_driver_override(rdi, offsetof(struct ib_device,
711 dealloc_pd),
712 rvt_dealloc_pd);
713 break;
714
715 default:
716 return -EINVAL;
717 }
718
719 return 0;
720}
721
722
723
724
725
726
727
728
729
730
731int rvt_register_device(struct rvt_dev_info *rdi, u32 driver_id)
732{
733 int ret = 0, i;
734
735 if (!rdi)
736 return -EINVAL;
737
738
739
740
741
742 for (i = 0; i < _VERB_IDX_MAX; i++)
743 if (check_support(rdi, i)) {
744 pr_err("Driver support req not met at %d\n", i);
745 return -EINVAL;
746 }
747
748
749
750 trace_rvt_dbg(rdi, "Driver attempting registration");
751 rvt_mmap_init(rdi);
752
753
754 ret = rvt_driver_qp_init(rdi);
755 if (ret) {
756 pr_err("Error in driver QP init.\n");
757 return -EINVAL;
758 }
759
760
761 spin_lock_init(&rdi->n_ahs_lock);
762 rdi->n_ahs_allocated = 0;
763
764
765 rvt_driver_srq_init(rdi);
766
767
768 rvt_driver_mcast_init(rdi);
769
770
771 ret = rvt_driver_mr_init(rdi);
772 if (ret) {
773 pr_err("Error in driver MR init.\n");
774 goto bail_no_mr;
775 }
776
777
778 spin_lock_init(&rdi->n_cqs_lock);
779
780
781 rdi->ibdev.dev.dma_ops = rdi->ibdev.dev.dma_ops ? : &dma_virt_ops;
782
783
784 spin_lock_init(&rdi->n_pds_lock);
785 rdi->n_pds_allocated = 0;
786
787
788
789
790
791
792
793 rdi->ibdev.uverbs_abi_ver = RVT_UVERBS_ABI_VERSION;
794 rdi->ibdev.uverbs_cmd_mask =
795 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
796 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
797 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
798 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
799 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
800 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
801 (1ull << IB_USER_VERBS_CMD_MODIFY_AH) |
802 (1ull << IB_USER_VERBS_CMD_QUERY_AH) |
803 (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
804 (1ull << IB_USER_VERBS_CMD_REG_MR) |
805 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
806 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
807 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
808 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
809 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
810 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
811 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
812 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
813 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
814 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
815 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
816 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
817 (1ull << IB_USER_VERBS_CMD_POST_RECV) |
818 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
819 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
820 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
821 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
822 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
823 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
824 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
825 rdi->ibdev.node_type = RDMA_NODE_IB_CA;
826 if (!rdi->ibdev.num_comp_vectors)
827 rdi->ibdev.num_comp_vectors = 1;
828
829 rdi->ibdev.driver_id = driver_id;
830
831 ret = ib_register_device(&rdi->ibdev, rdi->driver_f.port_callback);
832 if (ret) {
833 rvt_pr_err(rdi, "Failed to register driver with ib core.\n");
834 goto bail_mr;
835 }
836
837 rvt_create_mad_agents(rdi);
838
839 rvt_pr_info(rdi, "Registration with rdmavt done.\n");
840 return ret;
841
842bail_mr:
843 rvt_mr_exit(rdi);
844
845bail_no_mr:
846 rvt_qp_exit(rdi);
847
848 return ret;
849}
850EXPORT_SYMBOL(rvt_register_device);
851
852
853
854
855
856void rvt_unregister_device(struct rvt_dev_info *rdi)
857{
858 trace_rvt_dbg(rdi, "Driver is unregistering.");
859 if (!rdi)
860 return;
861
862 rvt_free_mad_agents(rdi);
863
864 ib_unregister_device(&rdi->ibdev);
865 rvt_mr_exit(rdi);
866 rvt_qp_exit(rdi);
867}
868EXPORT_SYMBOL(rvt_unregister_device);
869
870
871
872
873
874
875
876
877
878
879
880
881int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
882 int port_index, u16 *pkey_table)
883{
884
885 rdi->ports[port_index] = port;
886 rdi->ports[port_index]->pkey_table = pkey_table;
887
888 return 0;
889}
890EXPORT_SYMBOL(rvt_init_port);
891