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34#include <linux/dma-mapping.h>
35#include <net/addrconf.h>
36#include <rdma/uverbs_ioctl.h>
37#include "rxe.h"
38#include "rxe_loc.h"
39#include "rxe_queue.h"
40#include "rxe_hw_counters.h"
41
42static int rxe_query_device(struct ib_device *dev,
43 struct ib_device_attr *attr,
44 struct ib_udata *uhw)
45{
46 struct rxe_dev *rxe = to_rdev(dev);
47
48 if (uhw->inlen || uhw->outlen)
49 return -EINVAL;
50
51 *attr = rxe->attr;
52 return 0;
53}
54
55static int rxe_query_port(struct ib_device *dev,
56 u8 port_num, struct ib_port_attr *attr)
57{
58 struct rxe_dev *rxe = to_rdev(dev);
59 struct rxe_port *port;
60 int rc;
61
62 port = &rxe->port;
63
64
65 *attr = port->attr;
66
67 mutex_lock(&rxe->usdev_lock);
68 rc = ib_get_eth_speed(dev, port_num, &attr->active_speed,
69 &attr->active_width);
70
71 if (attr->state == IB_PORT_ACTIVE)
72 attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
73 else if (dev_get_flags(rxe->ndev) & IFF_UP)
74 attr->phys_state = IB_PORT_PHYS_STATE_POLLING;
75 else
76 attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;
77
78 mutex_unlock(&rxe->usdev_lock);
79
80 return rc;
81}
82
83static int rxe_query_pkey(struct ib_device *device,
84 u8 port_num, u16 index, u16 *pkey)
85{
86 struct rxe_dev *rxe = to_rdev(device);
87 struct rxe_port *port;
88
89 port = &rxe->port;
90
91 if (unlikely(index >= port->attr.pkey_tbl_len)) {
92 dev_warn(device->dev.parent, "invalid index = %d\n",
93 index);
94 goto err1;
95 }
96
97 *pkey = port->pkey_tbl[index];
98 return 0;
99
100err1:
101 return -EINVAL;
102}
103
104static int rxe_modify_device(struct ib_device *dev,
105 int mask, struct ib_device_modify *attr)
106{
107 struct rxe_dev *rxe = to_rdev(dev);
108
109 if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
110 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
111
112 if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
113 memcpy(rxe->ib_dev.node_desc,
114 attr->node_desc, sizeof(rxe->ib_dev.node_desc));
115 }
116
117 return 0;
118}
119
120static int rxe_modify_port(struct ib_device *dev,
121 u8 port_num, int mask, struct ib_port_modify *attr)
122{
123 struct rxe_dev *rxe = to_rdev(dev);
124 struct rxe_port *port;
125
126 port = &rxe->port;
127
128 port->attr.port_cap_flags |= attr->set_port_cap_mask;
129 port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
130
131 if (mask & IB_PORT_RESET_QKEY_CNTR)
132 port->attr.qkey_viol_cntr = 0;
133
134 return 0;
135}
136
137static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
138 u8 port_num)
139{
140 struct rxe_dev *rxe = to_rdev(dev);
141
142 return rxe_link_layer(rxe, port_num);
143}
144
145static int rxe_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
146{
147 struct rxe_dev *rxe = to_rdev(uctx->device);
148 struct rxe_ucontext *uc = to_ruc(uctx);
149
150 return rxe_add_to_pool(&rxe->uc_pool, &uc->pelem);
151}
152
153static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
154{
155 struct rxe_ucontext *uc = to_ruc(ibuc);
156
157 rxe_drop_ref(uc);
158}
159
160static int rxe_port_immutable(struct ib_device *dev, u8 port_num,
161 struct ib_port_immutable *immutable)
162{
163 int err;
164 struct ib_port_attr attr;
165
166 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
167
168 err = ib_query_port(dev, port_num, &attr);
169 if (err)
170 return err;
171
172 immutable->pkey_tbl_len = attr.pkey_tbl_len;
173 immutable->gid_tbl_len = attr.gid_tbl_len;
174 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
175
176 return 0;
177}
178
179static int rxe_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
180{
181 struct rxe_dev *rxe = to_rdev(ibpd->device);
182 struct rxe_pd *pd = to_rpd(ibpd);
183
184 return rxe_add_to_pool(&rxe->pd_pool, &pd->pelem);
185}
186
187static void rxe_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
188{
189 struct rxe_pd *pd = to_rpd(ibpd);
190
191 rxe_drop_ref(pd);
192}
193
194static int rxe_create_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr,
195 u32 flags, struct ib_udata *udata)
196
197{
198 int err;
199 struct rxe_dev *rxe = to_rdev(ibah->device);
200 struct rxe_ah *ah = to_rah(ibah);
201
202 err = rxe_av_chk_attr(rxe, attr);
203 if (err)
204 return err;
205
206 err = rxe_add_to_pool(&rxe->ah_pool, &ah->pelem);
207 if (err)
208 return err;
209
210 rxe_init_av(attr, &ah->av);
211 return 0;
212}
213
214static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
215{
216 int err;
217 struct rxe_dev *rxe = to_rdev(ibah->device);
218 struct rxe_ah *ah = to_rah(ibah);
219
220 err = rxe_av_chk_attr(rxe, attr);
221 if (err)
222 return err;
223
224 rxe_init_av(attr, &ah->av);
225 return 0;
226}
227
228static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
229{
230 struct rxe_ah *ah = to_rah(ibah);
231
232 memset(attr, 0, sizeof(*attr));
233 attr->type = ibah->type;
234 rxe_av_to_attr(&ah->av, attr);
235 return 0;
236}
237
238static void rxe_destroy_ah(struct ib_ah *ibah, u32 flags)
239{
240 struct rxe_ah *ah = to_rah(ibah);
241
242 rxe_drop_ref(ah);
243}
244
245static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr)
246{
247 int err;
248 int i;
249 u32 length;
250 struct rxe_recv_wqe *recv_wqe;
251 int num_sge = ibwr->num_sge;
252
253 if (unlikely(queue_full(rq->queue))) {
254 err = -ENOMEM;
255 goto err1;
256 }
257
258 if (unlikely(num_sge > rq->max_sge)) {
259 err = -EINVAL;
260 goto err1;
261 }
262
263 length = 0;
264 for (i = 0; i < num_sge; i++)
265 length += ibwr->sg_list[i].length;
266
267 recv_wqe = producer_addr(rq->queue);
268 recv_wqe->wr_id = ibwr->wr_id;
269 recv_wqe->num_sge = num_sge;
270
271 memcpy(recv_wqe->dma.sge, ibwr->sg_list,
272 num_sge * sizeof(struct ib_sge));
273
274 recv_wqe->dma.length = length;
275 recv_wqe->dma.resid = length;
276 recv_wqe->dma.num_sge = num_sge;
277 recv_wqe->dma.cur_sge = 0;
278 recv_wqe->dma.sge_offset = 0;
279
280
281
282
283 smp_wmb();
284
285 advance_producer(rq->queue);
286 return 0;
287
288err1:
289 return err;
290}
291
292static int rxe_create_srq(struct ib_srq *ibsrq, struct ib_srq_init_attr *init,
293 struct ib_udata *udata)
294{
295 int err;
296 struct rxe_dev *rxe = to_rdev(ibsrq->device);
297 struct rxe_pd *pd = to_rpd(ibsrq->pd);
298 struct rxe_srq *srq = to_rsrq(ibsrq);
299 struct rxe_create_srq_resp __user *uresp = NULL;
300
301 if (udata) {
302 if (udata->outlen < sizeof(*uresp))
303 return -EINVAL;
304 uresp = udata->outbuf;
305 }
306
307 err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK);
308 if (err)
309 goto err1;
310
311 err = rxe_add_to_pool(&rxe->srq_pool, &srq->pelem);
312 if (err)
313 goto err1;
314
315 rxe_add_ref(pd);
316 srq->pd = pd;
317
318 err = rxe_srq_from_init(rxe, srq, init, udata, uresp);
319 if (err)
320 goto err2;
321
322 return 0;
323
324err2:
325 rxe_drop_ref(pd);
326 rxe_drop_ref(srq);
327err1:
328 return err;
329}
330
331static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
332 enum ib_srq_attr_mask mask,
333 struct ib_udata *udata)
334{
335 int err;
336 struct rxe_srq *srq = to_rsrq(ibsrq);
337 struct rxe_dev *rxe = to_rdev(ibsrq->device);
338 struct rxe_modify_srq_cmd ucmd = {};
339
340 if (udata) {
341 if (udata->inlen < sizeof(ucmd))
342 return -EINVAL;
343
344 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
345 if (err)
346 return err;
347 }
348
349 err = rxe_srq_chk_attr(rxe, srq, attr, mask);
350 if (err)
351 goto err1;
352
353 err = rxe_srq_from_attr(rxe, srq, attr, mask, &ucmd, udata);
354 if (err)
355 goto err1;
356
357 return 0;
358
359err1:
360 return err;
361}
362
363static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
364{
365 struct rxe_srq *srq = to_rsrq(ibsrq);
366
367 if (srq->error)
368 return -EINVAL;
369
370 attr->max_wr = srq->rq.queue->buf->index_mask;
371 attr->max_sge = srq->rq.max_sge;
372 attr->srq_limit = srq->limit;
373 return 0;
374}
375
376static void rxe_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata)
377{
378 struct rxe_srq *srq = to_rsrq(ibsrq);
379
380 if (srq->rq.queue)
381 rxe_queue_cleanup(srq->rq.queue);
382
383 rxe_drop_ref(srq->pd);
384 rxe_drop_ref(srq);
385}
386
387static int rxe_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
388 const struct ib_recv_wr **bad_wr)
389{
390 int err = 0;
391 unsigned long flags;
392 struct rxe_srq *srq = to_rsrq(ibsrq);
393
394 spin_lock_irqsave(&srq->rq.producer_lock, flags);
395
396 while (wr) {
397 err = post_one_recv(&srq->rq, wr);
398 if (unlikely(err))
399 break;
400 wr = wr->next;
401 }
402
403 spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
404
405 if (err)
406 *bad_wr = wr;
407
408 return err;
409}
410
411static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd,
412 struct ib_qp_init_attr *init,
413 struct ib_udata *udata)
414{
415 int err;
416 struct rxe_dev *rxe = to_rdev(ibpd->device);
417 struct rxe_pd *pd = to_rpd(ibpd);
418 struct rxe_qp *qp;
419 struct rxe_create_qp_resp __user *uresp = NULL;
420
421 if (udata) {
422 if (udata->outlen < sizeof(*uresp))
423 return ERR_PTR(-EINVAL);
424 uresp = udata->outbuf;
425 }
426
427 err = rxe_qp_chk_init(rxe, init);
428 if (err)
429 goto err1;
430
431 qp = rxe_alloc(&rxe->qp_pool);
432 if (!qp) {
433 err = -ENOMEM;
434 goto err1;
435 }
436
437 if (udata) {
438 if (udata->inlen) {
439 err = -EINVAL;
440 goto err2;
441 }
442 qp->is_user = 1;
443 }
444
445 rxe_add_index(qp);
446
447 err = rxe_qp_from_init(rxe, qp, pd, init, uresp, ibpd, udata);
448 if (err)
449 goto err3;
450
451 return &qp->ibqp;
452
453err3:
454 rxe_drop_index(qp);
455err2:
456 rxe_drop_ref(qp);
457err1:
458 return ERR_PTR(err);
459}
460
461static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
462 int mask, struct ib_udata *udata)
463{
464 int err;
465 struct rxe_dev *rxe = to_rdev(ibqp->device);
466 struct rxe_qp *qp = to_rqp(ibqp);
467
468 err = rxe_qp_chk_attr(rxe, qp, attr, mask);
469 if (err)
470 goto err1;
471
472 err = rxe_qp_from_attr(qp, attr, mask, udata);
473 if (err)
474 goto err1;
475
476 return 0;
477
478err1:
479 return err;
480}
481
482static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
483 int mask, struct ib_qp_init_attr *init)
484{
485 struct rxe_qp *qp = to_rqp(ibqp);
486
487 rxe_qp_to_init(qp, init);
488 rxe_qp_to_attr(qp, attr, mask);
489
490 return 0;
491}
492
493static int rxe_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
494{
495 struct rxe_qp *qp = to_rqp(ibqp);
496
497 rxe_qp_destroy(qp);
498 rxe_drop_index(qp);
499 rxe_drop_ref(qp);
500 return 0;
501}
502
503static int validate_send_wr(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
504 unsigned int mask, unsigned int length)
505{
506 int num_sge = ibwr->num_sge;
507 struct rxe_sq *sq = &qp->sq;
508
509 if (unlikely(num_sge > sq->max_sge))
510 goto err1;
511
512 if (unlikely(mask & WR_ATOMIC_MASK)) {
513 if (length < 8)
514 goto err1;
515
516 if (atomic_wr(ibwr)->remote_addr & 0x7)
517 goto err1;
518 }
519
520 if (unlikely((ibwr->send_flags & IB_SEND_INLINE) &&
521 (length > sq->max_inline)))
522 goto err1;
523
524 return 0;
525
526err1:
527 return -EINVAL;
528}
529
530static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
531 const struct ib_send_wr *ibwr)
532{
533 wr->wr_id = ibwr->wr_id;
534 wr->num_sge = ibwr->num_sge;
535 wr->opcode = ibwr->opcode;
536 wr->send_flags = ibwr->send_flags;
537
538 if (qp_type(qp) == IB_QPT_UD ||
539 qp_type(qp) == IB_QPT_SMI ||
540 qp_type(qp) == IB_QPT_GSI) {
541 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn;
542 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey;
543 if (qp_type(qp) == IB_QPT_GSI)
544 wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index;
545 if (wr->opcode == IB_WR_SEND_WITH_IMM)
546 wr->ex.imm_data = ibwr->ex.imm_data;
547 } else {
548 switch (wr->opcode) {
549 case IB_WR_RDMA_WRITE_WITH_IMM:
550 wr->ex.imm_data = ibwr->ex.imm_data;
551
552 case IB_WR_RDMA_READ:
553 case IB_WR_RDMA_WRITE:
554 wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
555 wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey;
556 break;
557 case IB_WR_SEND_WITH_IMM:
558 wr->ex.imm_data = ibwr->ex.imm_data;
559 break;
560 case IB_WR_SEND_WITH_INV:
561 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
562 break;
563 case IB_WR_ATOMIC_CMP_AND_SWP:
564 case IB_WR_ATOMIC_FETCH_AND_ADD:
565 wr->wr.atomic.remote_addr =
566 atomic_wr(ibwr)->remote_addr;
567 wr->wr.atomic.compare_add =
568 atomic_wr(ibwr)->compare_add;
569 wr->wr.atomic.swap = atomic_wr(ibwr)->swap;
570 wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey;
571 break;
572 case IB_WR_LOCAL_INV:
573 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
574 break;
575 case IB_WR_REG_MR:
576 wr->wr.reg.mr = reg_wr(ibwr)->mr;
577 wr->wr.reg.key = reg_wr(ibwr)->key;
578 wr->wr.reg.access = reg_wr(ibwr)->access;
579 break;
580 default:
581 break;
582 }
583 }
584}
585
586static int init_send_wqe(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
587 unsigned int mask, unsigned int length,
588 struct rxe_send_wqe *wqe)
589{
590 int num_sge = ibwr->num_sge;
591 struct ib_sge *sge;
592 int i;
593 u8 *p;
594
595 init_send_wr(qp, &wqe->wr, ibwr);
596
597 if (qp_type(qp) == IB_QPT_UD ||
598 qp_type(qp) == IB_QPT_SMI ||
599 qp_type(qp) == IB_QPT_GSI)
600 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av));
601
602 if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) {
603 p = wqe->dma.inline_data;
604
605 sge = ibwr->sg_list;
606 for (i = 0; i < num_sge; i++, sge++) {
607 memcpy(p, (void *)(uintptr_t)sge->addr,
608 sge->length);
609
610 p += sge->length;
611 }
612 } else if (mask & WR_REG_MASK) {
613 wqe->mask = mask;
614 wqe->state = wqe_state_posted;
615 return 0;
616 } else
617 memcpy(wqe->dma.sge, ibwr->sg_list,
618 num_sge * sizeof(struct ib_sge));
619
620 wqe->iova = mask & WR_ATOMIC_MASK ? atomic_wr(ibwr)->remote_addr :
621 mask & WR_READ_OR_WRITE_MASK ? rdma_wr(ibwr)->remote_addr : 0;
622 wqe->mask = mask;
623 wqe->dma.length = length;
624 wqe->dma.resid = length;
625 wqe->dma.num_sge = num_sge;
626 wqe->dma.cur_sge = 0;
627 wqe->dma.sge_offset = 0;
628 wqe->state = wqe_state_posted;
629 wqe->ssn = atomic_add_return(1, &qp->ssn);
630
631 return 0;
632}
633
634static int post_one_send(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
635 unsigned int mask, u32 length)
636{
637 int err;
638 struct rxe_sq *sq = &qp->sq;
639 struct rxe_send_wqe *send_wqe;
640 unsigned long flags;
641
642 err = validate_send_wr(qp, ibwr, mask, length);
643 if (err)
644 return err;
645
646 spin_lock_irqsave(&qp->sq.sq_lock, flags);
647
648 if (unlikely(queue_full(sq->queue))) {
649 err = -ENOMEM;
650 goto err1;
651 }
652
653 send_wqe = producer_addr(sq->queue);
654
655 err = init_send_wqe(qp, ibwr, mask, length, send_wqe);
656 if (unlikely(err))
657 goto err1;
658
659
660
661
662
663 smp_wmb();
664
665 advance_producer(sq->queue);
666 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
667
668 return 0;
669
670err1:
671 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
672 return err;
673}
674
675static int rxe_post_send_kernel(struct rxe_qp *qp, const struct ib_send_wr *wr,
676 const struct ib_send_wr **bad_wr)
677{
678 int err = 0;
679 unsigned int mask;
680 unsigned int length = 0;
681 int i;
682
683 while (wr) {
684 mask = wr_opcode_mask(wr->opcode, qp);
685 if (unlikely(!mask)) {
686 err = -EINVAL;
687 *bad_wr = wr;
688 break;
689 }
690
691 if (unlikely((wr->send_flags & IB_SEND_INLINE) &&
692 !(mask & WR_INLINE_MASK))) {
693 err = -EINVAL;
694 *bad_wr = wr;
695 break;
696 }
697
698 length = 0;
699 for (i = 0; i < wr->num_sge; i++)
700 length += wr->sg_list[i].length;
701
702 err = post_one_send(qp, wr, mask, length);
703
704 if (err) {
705 *bad_wr = wr;
706 break;
707 }
708 wr = wr->next;
709 }
710
711 rxe_run_task(&qp->req.task, 1);
712 if (unlikely(qp->req.state == QP_STATE_ERROR))
713 rxe_run_task(&qp->comp.task, 1);
714
715 return err;
716}
717
718static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
719 const struct ib_send_wr **bad_wr)
720{
721 struct rxe_qp *qp = to_rqp(ibqp);
722
723 if (unlikely(!qp->valid)) {
724 *bad_wr = wr;
725 return -EINVAL;
726 }
727
728 if (unlikely(qp->req.state < QP_STATE_READY)) {
729 *bad_wr = wr;
730 return -EINVAL;
731 }
732
733 if (qp->is_user) {
734
735 rxe_run_task(&qp->req.task, 0);
736 return 0;
737 } else
738 return rxe_post_send_kernel(qp, wr, bad_wr);
739}
740
741static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
742 const struct ib_recv_wr **bad_wr)
743{
744 int err = 0;
745 struct rxe_qp *qp = to_rqp(ibqp);
746 struct rxe_rq *rq = &qp->rq;
747 unsigned long flags;
748
749 if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) {
750 *bad_wr = wr;
751 err = -EINVAL;
752 goto err1;
753 }
754
755 if (unlikely(qp->srq)) {
756 *bad_wr = wr;
757 err = -EINVAL;
758 goto err1;
759 }
760
761 spin_lock_irqsave(&rq->producer_lock, flags);
762
763 while (wr) {
764 err = post_one_recv(rq, wr);
765 if (unlikely(err)) {
766 *bad_wr = wr;
767 break;
768 }
769 wr = wr->next;
770 }
771
772 spin_unlock_irqrestore(&rq->producer_lock, flags);
773
774 if (qp->resp.state == QP_STATE_ERROR)
775 rxe_run_task(&qp->resp.task, 1);
776
777err1:
778 return err;
779}
780
781static int rxe_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
782 struct ib_udata *udata)
783{
784 int err;
785 struct ib_device *dev = ibcq->device;
786 struct rxe_dev *rxe = to_rdev(dev);
787 struct rxe_cq *cq = to_rcq(ibcq);
788 struct rxe_create_cq_resp __user *uresp = NULL;
789
790 if (udata) {
791 if (udata->outlen < sizeof(*uresp))
792 return -EINVAL;
793 uresp = udata->outbuf;
794 }
795
796 if (attr->flags)
797 return -EINVAL;
798
799 err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector);
800 if (err)
801 return err;
802
803 err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector, udata,
804 uresp);
805 if (err)
806 return err;
807
808 return rxe_add_to_pool(&rxe->cq_pool, &cq->pelem);
809}
810
811static void rxe_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
812{
813 struct rxe_cq *cq = to_rcq(ibcq);
814
815 rxe_cq_disable(cq);
816
817 rxe_drop_ref(cq);
818}
819
820static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
821{
822 int err;
823 struct rxe_cq *cq = to_rcq(ibcq);
824 struct rxe_dev *rxe = to_rdev(ibcq->device);
825 struct rxe_resize_cq_resp __user *uresp = NULL;
826
827 if (udata) {
828 if (udata->outlen < sizeof(*uresp))
829 return -EINVAL;
830 uresp = udata->outbuf;
831 }
832
833 err = rxe_cq_chk_attr(rxe, cq, cqe, 0);
834 if (err)
835 goto err1;
836
837 err = rxe_cq_resize_queue(cq, cqe, uresp, udata);
838 if (err)
839 goto err1;
840
841 return 0;
842
843err1:
844 return err;
845}
846
847static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
848{
849 int i;
850 struct rxe_cq *cq = to_rcq(ibcq);
851 struct rxe_cqe *cqe;
852 unsigned long flags;
853
854 spin_lock_irqsave(&cq->cq_lock, flags);
855 for (i = 0; i < num_entries; i++) {
856 cqe = queue_head(cq->queue);
857 if (!cqe)
858 break;
859
860 memcpy(wc++, &cqe->ibwc, sizeof(*wc));
861 advance_consumer(cq->queue);
862 }
863 spin_unlock_irqrestore(&cq->cq_lock, flags);
864
865 return i;
866}
867
868static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
869{
870 struct rxe_cq *cq = to_rcq(ibcq);
871 int count = queue_count(cq->queue);
872
873 return (count > wc_cnt) ? wc_cnt : count;
874}
875
876static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
877{
878 struct rxe_cq *cq = to_rcq(ibcq);
879 unsigned long irq_flags;
880 int ret = 0;
881
882 spin_lock_irqsave(&cq->cq_lock, irq_flags);
883 if (cq->notify != IB_CQ_NEXT_COMP)
884 cq->notify = flags & IB_CQ_SOLICITED_MASK;
885
886 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !queue_empty(cq->queue))
887 ret = 1;
888
889 spin_unlock_irqrestore(&cq->cq_lock, irq_flags);
890
891 return ret;
892}
893
894static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
895{
896 struct rxe_dev *rxe = to_rdev(ibpd->device);
897 struct rxe_pd *pd = to_rpd(ibpd);
898 struct rxe_mem *mr;
899 int err;
900
901 mr = rxe_alloc(&rxe->mr_pool);
902 if (!mr) {
903 err = -ENOMEM;
904 goto err1;
905 }
906
907 rxe_add_index(mr);
908
909 rxe_add_ref(pd);
910
911 err = rxe_mem_init_dma(pd, access, mr);
912 if (err)
913 goto err2;
914
915 return &mr->ibmr;
916
917err2:
918 rxe_drop_ref(pd);
919 rxe_drop_index(mr);
920 rxe_drop_ref(mr);
921err1:
922 return ERR_PTR(err);
923}
924
925static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
926 u64 start,
927 u64 length,
928 u64 iova,
929 int access, struct ib_udata *udata)
930{
931 int err;
932 struct rxe_dev *rxe = to_rdev(ibpd->device);
933 struct rxe_pd *pd = to_rpd(ibpd);
934 struct rxe_mem *mr;
935
936 mr = rxe_alloc(&rxe->mr_pool);
937 if (!mr) {
938 err = -ENOMEM;
939 goto err2;
940 }
941
942 rxe_add_index(mr);
943
944 rxe_add_ref(pd);
945
946 err = rxe_mem_init_user(pd, start, length, iova,
947 access, udata, mr);
948 if (err)
949 goto err3;
950
951 return &mr->ibmr;
952
953err3:
954 rxe_drop_ref(pd);
955 rxe_drop_index(mr);
956 rxe_drop_ref(mr);
957err2:
958 return ERR_PTR(err);
959}
960
961static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
962{
963 struct rxe_mem *mr = to_rmr(ibmr);
964
965 mr->state = RXE_MEM_STATE_ZOMBIE;
966 rxe_drop_ref(mr->pd);
967 rxe_drop_index(mr);
968 rxe_drop_ref(mr);
969 return 0;
970}
971
972static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
973 u32 max_num_sg, struct ib_udata *udata)
974{
975 struct rxe_dev *rxe = to_rdev(ibpd->device);
976 struct rxe_pd *pd = to_rpd(ibpd);
977 struct rxe_mem *mr;
978 int err;
979
980 if (mr_type != IB_MR_TYPE_MEM_REG)
981 return ERR_PTR(-EINVAL);
982
983 mr = rxe_alloc(&rxe->mr_pool);
984 if (!mr) {
985 err = -ENOMEM;
986 goto err1;
987 }
988
989 rxe_add_index(mr);
990
991 rxe_add_ref(pd);
992
993 err = rxe_mem_init_fast(pd, max_num_sg, mr);
994 if (err)
995 goto err2;
996
997 return &mr->ibmr;
998
999err2:
1000 rxe_drop_ref(pd);
1001 rxe_drop_index(mr);
1002 rxe_drop_ref(mr);
1003err1:
1004 return ERR_PTR(err);
1005}
1006
1007static int rxe_set_page(struct ib_mr *ibmr, u64 addr)
1008{
1009 struct rxe_mem *mr = to_rmr(ibmr);
1010 struct rxe_map *map;
1011 struct rxe_phys_buf *buf;
1012
1013 if (unlikely(mr->nbuf == mr->num_buf))
1014 return -ENOMEM;
1015
1016 map = mr->map[mr->nbuf / RXE_BUF_PER_MAP];
1017 buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP];
1018
1019 buf->addr = addr;
1020 buf->size = ibmr->page_size;
1021 mr->nbuf++;
1022
1023 return 0;
1024}
1025
1026static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
1027 int sg_nents, unsigned int *sg_offset)
1028{
1029 struct rxe_mem *mr = to_rmr(ibmr);
1030 int n;
1031
1032 mr->nbuf = 0;
1033
1034 n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page);
1035
1036 mr->va = ibmr->iova;
1037 mr->iova = ibmr->iova;
1038 mr->length = ibmr->length;
1039 mr->page_shift = ilog2(ibmr->page_size);
1040 mr->page_mask = ibmr->page_size - 1;
1041 mr->offset = mr->iova & mr->page_mask;
1042
1043 return n;
1044}
1045
1046static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1047{
1048 int err;
1049 struct rxe_dev *rxe = to_rdev(ibqp->device);
1050 struct rxe_qp *qp = to_rqp(ibqp);
1051 struct rxe_mc_grp *grp;
1052
1053
1054 err = rxe_mcast_get_grp(rxe, mgid, &grp);
1055 if (err)
1056 return err;
1057
1058 err = rxe_mcast_add_grp_elem(rxe, qp, grp);
1059
1060 rxe_drop_ref(grp);
1061 return err;
1062}
1063
1064static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1065{
1066 struct rxe_dev *rxe = to_rdev(ibqp->device);
1067 struct rxe_qp *qp = to_rqp(ibqp);
1068
1069 return rxe_mcast_drop_grp_elem(rxe, qp, mgid);
1070}
1071
1072static ssize_t parent_show(struct device *device,
1073 struct device_attribute *attr, char *buf)
1074{
1075 struct rxe_dev *rxe =
1076 rdma_device_to_drv_device(device, struct rxe_dev, ib_dev);
1077
1078 return snprintf(buf, 16, "%s\n", rxe_parent_name(rxe, 1));
1079}
1080
1081static DEVICE_ATTR_RO(parent);
1082
1083static struct attribute *rxe_dev_attributes[] = {
1084 &dev_attr_parent.attr,
1085 NULL
1086};
1087
1088static const struct attribute_group rxe_attr_group = {
1089 .attrs = rxe_dev_attributes,
1090};
1091
1092static int rxe_enable_driver(struct ib_device *ib_dev)
1093{
1094 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
1095
1096 rxe_set_port_state(rxe);
1097 dev_info(&rxe->ib_dev.dev, "added %s\n", netdev_name(rxe->ndev));
1098 return 0;
1099}
1100
1101static const struct ib_device_ops rxe_dev_ops = {
1102 .owner = THIS_MODULE,
1103 .driver_id = RDMA_DRIVER_RXE,
1104 .uverbs_abi_ver = RXE_UVERBS_ABI_VERSION,
1105
1106 .alloc_hw_stats = rxe_ib_alloc_hw_stats,
1107 .alloc_mr = rxe_alloc_mr,
1108 .alloc_pd = rxe_alloc_pd,
1109 .alloc_ucontext = rxe_alloc_ucontext,
1110 .attach_mcast = rxe_attach_mcast,
1111 .create_ah = rxe_create_ah,
1112 .create_cq = rxe_create_cq,
1113 .create_qp = rxe_create_qp,
1114 .create_srq = rxe_create_srq,
1115 .dealloc_driver = rxe_dealloc,
1116 .dealloc_pd = rxe_dealloc_pd,
1117 .dealloc_ucontext = rxe_dealloc_ucontext,
1118 .dereg_mr = rxe_dereg_mr,
1119 .destroy_ah = rxe_destroy_ah,
1120 .destroy_cq = rxe_destroy_cq,
1121 .destroy_qp = rxe_destroy_qp,
1122 .destroy_srq = rxe_destroy_srq,
1123 .detach_mcast = rxe_detach_mcast,
1124 .enable_driver = rxe_enable_driver,
1125 .get_dma_mr = rxe_get_dma_mr,
1126 .get_hw_stats = rxe_ib_get_hw_stats,
1127 .get_link_layer = rxe_get_link_layer,
1128 .get_port_immutable = rxe_port_immutable,
1129 .map_mr_sg = rxe_map_mr_sg,
1130 .mmap = rxe_mmap,
1131 .modify_ah = rxe_modify_ah,
1132 .modify_device = rxe_modify_device,
1133 .modify_port = rxe_modify_port,
1134 .modify_qp = rxe_modify_qp,
1135 .modify_srq = rxe_modify_srq,
1136 .peek_cq = rxe_peek_cq,
1137 .poll_cq = rxe_poll_cq,
1138 .post_recv = rxe_post_recv,
1139 .post_send = rxe_post_send,
1140 .post_srq_recv = rxe_post_srq_recv,
1141 .query_ah = rxe_query_ah,
1142 .query_device = rxe_query_device,
1143 .query_pkey = rxe_query_pkey,
1144 .query_port = rxe_query_port,
1145 .query_qp = rxe_query_qp,
1146 .query_srq = rxe_query_srq,
1147 .reg_user_mr = rxe_reg_user_mr,
1148 .req_notify_cq = rxe_req_notify_cq,
1149 .resize_cq = rxe_resize_cq,
1150
1151 INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah),
1152 INIT_RDMA_OBJ_SIZE(ib_cq, rxe_cq, ibcq),
1153 INIT_RDMA_OBJ_SIZE(ib_pd, rxe_pd, ibpd),
1154 INIT_RDMA_OBJ_SIZE(ib_srq, rxe_srq, ibsrq),
1155 INIT_RDMA_OBJ_SIZE(ib_ucontext, rxe_ucontext, ibuc),
1156};
1157
1158int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name)
1159{
1160 int err;
1161 struct ib_device *dev = &rxe->ib_dev;
1162 struct crypto_shash *tfm;
1163
1164 strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
1165
1166 dev->node_type = RDMA_NODE_IB_CA;
1167 dev->phys_port_cnt = 1;
1168 dev->num_comp_vectors = num_possible_cpus();
1169 dev->dev.parent = rxe_dma_device(rxe);
1170 dev->local_dma_lkey = 0;
1171 addrconf_addr_eui48((unsigned char *)&dev->node_guid,
1172 rxe->ndev->dev_addr);
1173 dev->dev.dma_ops = &dma_virt_ops;
1174 dma_coerce_mask_and_coherent(&dev->dev,
1175 dma_get_required_mask(&dev->dev));
1176
1177 dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT)
1178 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)
1179 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE)
1180 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT)
1181 | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD)
1182 | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD)
1183 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ)
1184 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ)
1185 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ)
1186 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ)
1187 | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV)
1188 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP)
1189 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP)
1190 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP)
1191 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP)
1192 | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND)
1193 | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV)
1194 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ)
1195 | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ)
1196 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ)
1197 | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ)
1198 | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ)
1199 | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)
1200 | BIT_ULL(IB_USER_VERBS_CMD_REG_MR)
1201 | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR)
1202 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH)
1203 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH)
1204 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH)
1205 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH)
1206 | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST)
1207 | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST)
1208 ;
1209
1210 ib_set_device_ops(dev, &rxe_dev_ops);
1211 err = ib_device_set_netdev(&rxe->ib_dev, rxe->ndev, 1);
1212 if (err)
1213 return err;
1214
1215 tfm = crypto_alloc_shash("crc32", 0, 0);
1216 if (IS_ERR(tfm)) {
1217 pr_err("failed to allocate crc algorithm err:%ld\n",
1218 PTR_ERR(tfm));
1219 return PTR_ERR(tfm);
1220 }
1221 rxe->tfm = tfm;
1222
1223 rdma_set_device_sysfs_group(dev, &rxe_attr_group);
1224 err = ib_register_device(dev, ibdev_name);
1225 if (err)
1226 pr_warn("%s failed with error %d\n", __func__, err);
1227
1228
1229
1230
1231
1232 return err;
1233}
1234
