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34#include <linux/dma-mapping.h>
35#include <net/addrconf.h>
36#include "rxe.h"
37#include "rxe_loc.h"
38#include "rxe_queue.h"
39#include "rxe_hw_counters.h"
40
41static int rxe_query_device(struct ib_device *dev,
42 struct ib_device_attr *attr,
43 struct ib_udata *uhw)
44{
45 struct rxe_dev *rxe = to_rdev(dev);
46
47 if (uhw->inlen || uhw->outlen)
48 return -EINVAL;
49
50 *attr = rxe->attr;
51 return 0;
52}
53
54static void rxe_eth_speed_to_ib_speed(int speed, u8 *active_speed,
55 u8 *active_width)
56{
57 if (speed <= 1000) {
58 *active_width = IB_WIDTH_1X;
59 *active_speed = IB_SPEED_SDR;
60 } else if (speed <= 10000) {
61 *active_width = IB_WIDTH_1X;
62 *active_speed = IB_SPEED_FDR10;
63 } else if (speed <= 20000) {
64 *active_width = IB_WIDTH_4X;
65 *active_speed = IB_SPEED_DDR;
66 } else if (speed <= 30000) {
67 *active_width = IB_WIDTH_4X;
68 *active_speed = IB_SPEED_QDR;
69 } else if (speed <= 40000) {
70 *active_width = IB_WIDTH_4X;
71 *active_speed = IB_SPEED_FDR10;
72 } else {
73 *active_width = IB_WIDTH_4X;
74 *active_speed = IB_SPEED_EDR;
75 }
76}
77
78static int rxe_query_port(struct ib_device *dev,
79 u8 port_num, struct ib_port_attr *attr)
80{
81 struct rxe_dev *rxe = to_rdev(dev);
82 struct rxe_port *port;
83 u32 speed;
84
85 if (unlikely(port_num != 1)) {
86 pr_warn("invalid port_number %d\n", port_num);
87 goto err1;
88 }
89
90 port = &rxe->port;
91
92
93 *attr = port->attr;
94
95 mutex_lock(&rxe->usdev_lock);
96 if (rxe->ndev->ethtool_ops->get_link_ksettings) {
97 struct ethtool_link_ksettings ks;
98
99 rxe->ndev->ethtool_ops->get_link_ksettings(rxe->ndev, &ks);
100 speed = ks.base.speed;
101 } else if (rxe->ndev->ethtool_ops->get_settings) {
102 struct ethtool_cmd cmd;
103
104 rxe->ndev->ethtool_ops->get_settings(rxe->ndev, &cmd);
105 speed = cmd.speed;
106 } else {
107 pr_warn("%s speed is unknown, defaulting to 1000\n",
108 rxe->ndev->name);
109 speed = 1000;
110 }
111 rxe_eth_speed_to_ib_speed(speed, &attr->active_speed,
112 &attr->active_width);
113 mutex_unlock(&rxe->usdev_lock);
114
115 return 0;
116
117err1:
118 return -EINVAL;
119}
120
121static int rxe_query_gid(struct ib_device *device,
122 u8 port_num, int index, union ib_gid *gid)
123{
124 int ret;
125
126 if (index > RXE_PORT_GID_TBL_LEN)
127 return -EINVAL;
128
129 ret = ib_get_cached_gid(device, port_num, index, gid, NULL);
130 if (ret == -EAGAIN) {
131 memcpy(gid, &zgid, sizeof(*gid));
132 return 0;
133 }
134
135 return ret;
136}
137
138static int rxe_add_gid(struct ib_device *device, u8 port_num, unsigned int
139 index, const union ib_gid *gid,
140 const struct ib_gid_attr *attr, void **context)
141{
142 if (index >= RXE_PORT_GID_TBL_LEN)
143 return -EINVAL;
144 return 0;
145}
146
147static int rxe_del_gid(struct ib_device *device, u8 port_num, unsigned int
148 index, void **context)
149{
150 if (index >= RXE_PORT_GID_TBL_LEN)
151 return -EINVAL;
152 return 0;
153}
154
155static struct net_device *rxe_get_netdev(struct ib_device *device,
156 u8 port_num)
157{
158 struct rxe_dev *rxe = to_rdev(device);
159
160 if (rxe->ndev) {
161 dev_hold(rxe->ndev);
162 return rxe->ndev;
163 }
164
165 return NULL;
166}
167
168static int rxe_query_pkey(struct ib_device *device,
169 u8 port_num, u16 index, u16 *pkey)
170{
171 struct rxe_dev *rxe = to_rdev(device);
172 struct rxe_port *port;
173
174 if (unlikely(port_num != 1)) {
175 dev_warn(device->dev.parent, "invalid port_num = %d\n",
176 port_num);
177 goto err1;
178 }
179
180 port = &rxe->port;
181
182 if (unlikely(index >= port->attr.pkey_tbl_len)) {
183 dev_warn(device->dev.parent, "invalid index = %d\n",
184 index);
185 goto err1;
186 }
187
188 *pkey = port->pkey_tbl[index];
189 return 0;
190
191err1:
192 return -EINVAL;
193}
194
195static int rxe_modify_device(struct ib_device *dev,
196 int mask, struct ib_device_modify *attr)
197{
198 struct rxe_dev *rxe = to_rdev(dev);
199
200 if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
201 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
202
203 if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
204 memcpy(rxe->ib_dev.node_desc,
205 attr->node_desc, sizeof(rxe->ib_dev.node_desc));
206 }
207
208 return 0;
209}
210
211static int rxe_modify_port(struct ib_device *dev,
212 u8 port_num, int mask, struct ib_port_modify *attr)
213{
214 struct rxe_dev *rxe = to_rdev(dev);
215 struct rxe_port *port;
216
217 if (unlikely(port_num != 1)) {
218 pr_warn("invalid port_num = %d\n", port_num);
219 goto err1;
220 }
221
222 port = &rxe->port;
223
224 port->attr.port_cap_flags |= attr->set_port_cap_mask;
225 port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
226
227 if (mask & IB_PORT_RESET_QKEY_CNTR)
228 port->attr.qkey_viol_cntr = 0;
229
230 return 0;
231
232err1:
233 return -EINVAL;
234}
235
236static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
237 u8 port_num)
238{
239 struct rxe_dev *rxe = to_rdev(dev);
240
241 return rxe_link_layer(rxe, port_num);
242}
243
244static struct ib_ucontext *rxe_alloc_ucontext(struct ib_device *dev,
245 struct ib_udata *udata)
246{
247 struct rxe_dev *rxe = to_rdev(dev);
248 struct rxe_ucontext *uc;
249
250 uc = rxe_alloc(&rxe->uc_pool);
251 return uc ? &uc->ibuc : ERR_PTR(-ENOMEM);
252}
253
254static int rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
255{
256 struct rxe_ucontext *uc = to_ruc(ibuc);
257
258 rxe_drop_ref(uc);
259 return 0;
260}
261
262static int rxe_port_immutable(struct ib_device *dev, u8 port_num,
263 struct ib_port_immutable *immutable)
264{
265 int err;
266 struct ib_port_attr attr;
267
268 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
269
270 err = ib_query_port(dev, port_num, &attr);
271 if (err)
272 return err;
273
274 immutable->pkey_tbl_len = attr.pkey_tbl_len;
275 immutable->gid_tbl_len = attr.gid_tbl_len;
276 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
277
278 return 0;
279}
280
281static struct ib_pd *rxe_alloc_pd(struct ib_device *dev,
282 struct ib_ucontext *context,
283 struct ib_udata *udata)
284{
285 struct rxe_dev *rxe = to_rdev(dev);
286 struct rxe_pd *pd;
287
288 pd = rxe_alloc(&rxe->pd_pool);
289 return pd ? &pd->ibpd : ERR_PTR(-ENOMEM);
290}
291
292static int rxe_dealloc_pd(struct ib_pd *ibpd)
293{
294 struct rxe_pd *pd = to_rpd(ibpd);
295
296 rxe_drop_ref(pd);
297 return 0;
298}
299
300static int rxe_init_av(struct rxe_dev *rxe, struct rdma_ah_attr *attr,
301 struct rxe_av *av)
302{
303 int err;
304 union ib_gid sgid;
305 struct ib_gid_attr sgid_attr;
306
307 err = ib_get_cached_gid(&rxe->ib_dev, rdma_ah_get_port_num(attr),
308 rdma_ah_read_grh(attr)->sgid_index, &sgid,
309 &sgid_attr);
310 if (err) {
311 pr_err("Failed to query sgid. err = %d\n", err);
312 return err;
313 }
314
315 err = rxe_av_from_attr(rxe, rdma_ah_get_port_num(attr), av, attr);
316 if (!err)
317 err = rxe_av_fill_ip_info(rxe, av, attr, &sgid_attr, &sgid);
318
319 if (sgid_attr.ndev)
320 dev_put(sgid_attr.ndev);
321 return err;
322}
323
324static struct ib_ah *rxe_create_ah(struct ib_pd *ibpd,
325 struct rdma_ah_attr *attr,
326 struct ib_udata *udata)
327
328{
329 int err;
330 struct rxe_dev *rxe = to_rdev(ibpd->device);
331 struct rxe_pd *pd = to_rpd(ibpd);
332 struct rxe_ah *ah;
333
334 err = rxe_av_chk_attr(rxe, attr);
335 if (err)
336 goto err1;
337
338 ah = rxe_alloc(&rxe->ah_pool);
339 if (!ah) {
340 err = -ENOMEM;
341 goto err1;
342 }
343
344 rxe_add_ref(pd);
345 ah->pd = pd;
346
347 err = rxe_init_av(rxe, attr, &ah->av);
348 if (err)
349 goto err2;
350
351 return &ah->ibah;
352
353err2:
354 rxe_drop_ref(pd);
355 rxe_drop_ref(ah);
356err1:
357 return ERR_PTR(err);
358}
359
360static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
361{
362 int err;
363 struct rxe_dev *rxe = to_rdev(ibah->device);
364 struct rxe_ah *ah = to_rah(ibah);
365
366 err = rxe_av_chk_attr(rxe, attr);
367 if (err)
368 return err;
369
370 err = rxe_init_av(rxe, attr, &ah->av);
371 if (err)
372 return err;
373
374 return 0;
375}
376
377static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
378{
379 struct rxe_dev *rxe = to_rdev(ibah->device);
380 struct rxe_ah *ah = to_rah(ibah);
381
382 memset(attr, 0, sizeof(*attr));
383 attr->type = ibah->type;
384 rxe_av_to_attr(rxe, &ah->av, attr);
385 return 0;
386}
387
388static int rxe_destroy_ah(struct ib_ah *ibah)
389{
390 struct rxe_ah *ah = to_rah(ibah);
391
392 rxe_drop_ref(ah->pd);
393 rxe_drop_ref(ah);
394 return 0;
395}
396
397static int post_one_recv(struct rxe_rq *rq, struct ib_recv_wr *ibwr)
398{
399 int err;
400 int i;
401 u32 length;
402 struct rxe_recv_wqe *recv_wqe;
403 int num_sge = ibwr->num_sge;
404
405 if (unlikely(queue_full(rq->queue))) {
406 err = -ENOMEM;
407 goto err1;
408 }
409
410 if (unlikely(num_sge > rq->max_sge)) {
411 err = -EINVAL;
412 goto err1;
413 }
414
415 length = 0;
416 for (i = 0; i < num_sge; i++)
417 length += ibwr->sg_list[i].length;
418
419 recv_wqe = producer_addr(rq->queue);
420 recv_wqe->wr_id = ibwr->wr_id;
421 recv_wqe->num_sge = num_sge;
422
423 memcpy(recv_wqe->dma.sge, ibwr->sg_list,
424 num_sge * sizeof(struct ib_sge));
425
426 recv_wqe->dma.length = length;
427 recv_wqe->dma.resid = length;
428 recv_wqe->dma.num_sge = num_sge;
429 recv_wqe->dma.cur_sge = 0;
430 recv_wqe->dma.sge_offset = 0;
431
432
433
434
435 smp_wmb();
436
437 advance_producer(rq->queue);
438 return 0;
439
440err1:
441 return err;
442}
443
444static struct ib_srq *rxe_create_srq(struct ib_pd *ibpd,
445 struct ib_srq_init_attr *init,
446 struct ib_udata *udata)
447{
448 int err;
449 struct rxe_dev *rxe = to_rdev(ibpd->device);
450 struct rxe_pd *pd = to_rpd(ibpd);
451 struct rxe_srq *srq;
452 struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
453
454 err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK);
455 if (err)
456 goto err1;
457
458 srq = rxe_alloc(&rxe->srq_pool);
459 if (!srq) {
460 err = -ENOMEM;
461 goto err1;
462 }
463
464 rxe_add_index(srq);
465 rxe_add_ref(pd);
466 srq->pd = pd;
467
468 err = rxe_srq_from_init(rxe, srq, init, context, udata);
469 if (err)
470 goto err2;
471
472 return &srq->ibsrq;
473
474err2:
475 rxe_drop_ref(pd);
476 rxe_drop_index(srq);
477 rxe_drop_ref(srq);
478err1:
479 return ERR_PTR(err);
480}
481
482static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
483 enum ib_srq_attr_mask mask,
484 struct ib_udata *udata)
485{
486 int err;
487 struct rxe_srq *srq = to_rsrq(ibsrq);
488 struct rxe_dev *rxe = to_rdev(ibsrq->device);
489
490 err = rxe_srq_chk_attr(rxe, srq, attr, mask);
491 if (err)
492 goto err1;
493
494 err = rxe_srq_from_attr(rxe, srq, attr, mask, udata);
495 if (err)
496 goto err1;
497
498 return 0;
499
500err1:
501 return err;
502}
503
504static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
505{
506 struct rxe_srq *srq = to_rsrq(ibsrq);
507
508 if (srq->error)
509 return -EINVAL;
510
511 attr->max_wr = srq->rq.queue->buf->index_mask;
512 attr->max_sge = srq->rq.max_sge;
513 attr->srq_limit = srq->limit;
514 return 0;
515}
516
517static int rxe_destroy_srq(struct ib_srq *ibsrq)
518{
519 struct rxe_srq *srq = to_rsrq(ibsrq);
520
521 if (srq->rq.queue)
522 rxe_queue_cleanup(srq->rq.queue);
523
524 rxe_drop_ref(srq->pd);
525 rxe_drop_index(srq);
526 rxe_drop_ref(srq);
527
528 return 0;
529}
530
531static int rxe_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
532 struct ib_recv_wr **bad_wr)
533{
534 int err = 0;
535 unsigned long flags;
536 struct rxe_srq *srq = to_rsrq(ibsrq);
537
538 spin_lock_irqsave(&srq->rq.producer_lock, flags);
539
540 while (wr) {
541 err = post_one_recv(&srq->rq, wr);
542 if (unlikely(err))
543 break;
544 wr = wr->next;
545 }
546
547 spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
548
549 if (err)
550 *bad_wr = wr;
551
552 return err;
553}
554
555static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd,
556 struct ib_qp_init_attr *init,
557 struct ib_udata *udata)
558{
559 int err;
560 struct rxe_dev *rxe = to_rdev(ibpd->device);
561 struct rxe_pd *pd = to_rpd(ibpd);
562 struct rxe_qp *qp;
563
564 err = rxe_qp_chk_init(rxe, init);
565 if (err)
566 goto err1;
567
568 qp = rxe_alloc(&rxe->qp_pool);
569 if (!qp) {
570 err = -ENOMEM;
571 goto err1;
572 }
573
574 if (udata) {
575 if (udata->inlen) {
576 err = -EINVAL;
577 goto err2;
578 }
579 qp->is_user = 1;
580 }
581
582 rxe_add_index(qp);
583
584 err = rxe_qp_from_init(rxe, qp, pd, init, udata, ibpd);
585 if (err)
586 goto err3;
587
588 return &qp->ibqp;
589
590err3:
591 rxe_drop_index(qp);
592err2:
593 rxe_drop_ref(qp);
594err1:
595 return ERR_PTR(err);
596}
597
598static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
599 int mask, struct ib_udata *udata)
600{
601 int err;
602 struct rxe_dev *rxe = to_rdev(ibqp->device);
603 struct rxe_qp *qp = to_rqp(ibqp);
604
605 err = rxe_qp_chk_attr(rxe, qp, attr, mask);
606 if (err)
607 goto err1;
608
609 err = rxe_qp_from_attr(qp, attr, mask, udata);
610 if (err)
611 goto err1;
612
613 return 0;
614
615err1:
616 return err;
617}
618
619static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
620 int mask, struct ib_qp_init_attr *init)
621{
622 struct rxe_qp *qp = to_rqp(ibqp);
623
624 rxe_qp_to_init(qp, init);
625 rxe_qp_to_attr(qp, attr, mask);
626
627 return 0;
628}
629
630static int rxe_destroy_qp(struct ib_qp *ibqp)
631{
632 struct rxe_qp *qp = to_rqp(ibqp);
633
634 rxe_qp_destroy(qp);
635 rxe_drop_index(qp);
636 rxe_drop_ref(qp);
637 return 0;
638}
639
640static int validate_send_wr(struct rxe_qp *qp, struct ib_send_wr *ibwr,
641 unsigned int mask, unsigned int length)
642{
643 int num_sge = ibwr->num_sge;
644 struct rxe_sq *sq = &qp->sq;
645
646 if (unlikely(num_sge > sq->max_sge))
647 goto err1;
648
649 if (unlikely(mask & WR_ATOMIC_MASK)) {
650 if (length < 8)
651 goto err1;
652
653 if (atomic_wr(ibwr)->remote_addr & 0x7)
654 goto err1;
655 }
656
657 if (unlikely((ibwr->send_flags & IB_SEND_INLINE) &&
658 (length > sq->max_inline)))
659 goto err1;
660
661 return 0;
662
663err1:
664 return -EINVAL;
665}
666
667static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
668 struct ib_send_wr *ibwr)
669{
670 wr->wr_id = ibwr->wr_id;
671 wr->num_sge = ibwr->num_sge;
672 wr->opcode = ibwr->opcode;
673 wr->send_flags = ibwr->send_flags;
674
675 if (qp_type(qp) == IB_QPT_UD ||
676 qp_type(qp) == IB_QPT_SMI ||
677 qp_type(qp) == IB_QPT_GSI) {
678 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn;
679 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey;
680 if (qp_type(qp) == IB_QPT_GSI)
681 wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index;
682 if (wr->opcode == IB_WR_SEND_WITH_IMM)
683 wr->ex.imm_data = ibwr->ex.imm_data;
684 } else {
685 switch (wr->opcode) {
686 case IB_WR_RDMA_WRITE_WITH_IMM:
687 wr->ex.imm_data = ibwr->ex.imm_data;
688 case IB_WR_RDMA_READ:
689 case IB_WR_RDMA_WRITE:
690 wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
691 wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey;
692 break;
693 case IB_WR_SEND_WITH_IMM:
694 wr->ex.imm_data = ibwr->ex.imm_data;
695 break;
696 case IB_WR_SEND_WITH_INV:
697 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
698 break;
699 case IB_WR_ATOMIC_CMP_AND_SWP:
700 case IB_WR_ATOMIC_FETCH_AND_ADD:
701 wr->wr.atomic.remote_addr =
702 atomic_wr(ibwr)->remote_addr;
703 wr->wr.atomic.compare_add =
704 atomic_wr(ibwr)->compare_add;
705 wr->wr.atomic.swap = atomic_wr(ibwr)->swap;
706 wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey;
707 break;
708 case IB_WR_LOCAL_INV:
709 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
710 break;
711 case IB_WR_REG_MR:
712 wr->wr.reg.mr = reg_wr(ibwr)->mr;
713 wr->wr.reg.key = reg_wr(ibwr)->key;
714 wr->wr.reg.access = reg_wr(ibwr)->access;
715 break;
716 default:
717 break;
718 }
719 }
720}
721
722static int init_send_wqe(struct rxe_qp *qp, struct ib_send_wr *ibwr,
723 unsigned int mask, unsigned int length,
724 struct rxe_send_wqe *wqe)
725{
726 int num_sge = ibwr->num_sge;
727 struct ib_sge *sge;
728 int i;
729 u8 *p;
730
731 init_send_wr(qp, &wqe->wr, ibwr);
732
733 if (qp_type(qp) == IB_QPT_UD ||
734 qp_type(qp) == IB_QPT_SMI ||
735 qp_type(qp) == IB_QPT_GSI)
736 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av));
737
738 if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) {
739 p = wqe->dma.inline_data;
740
741 sge = ibwr->sg_list;
742 for (i = 0; i < num_sge; i++, sge++) {
743 memcpy(p, (void *)(uintptr_t)sge->addr,
744 sge->length);
745
746 p += sge->length;
747 }
748 } else if (mask & WR_REG_MASK) {
749 wqe->mask = mask;
750 wqe->state = wqe_state_posted;
751 return 0;
752 } else
753 memcpy(wqe->dma.sge, ibwr->sg_list,
754 num_sge * sizeof(struct ib_sge));
755
756 wqe->iova = (mask & WR_ATOMIC_MASK) ?
757 atomic_wr(ibwr)->remote_addr :
758 rdma_wr(ibwr)->remote_addr;
759 wqe->mask = mask;
760 wqe->dma.length = length;
761 wqe->dma.resid = length;
762 wqe->dma.num_sge = num_sge;
763 wqe->dma.cur_sge = 0;
764 wqe->dma.sge_offset = 0;
765 wqe->state = wqe_state_posted;
766 wqe->ssn = atomic_add_return(1, &qp->ssn);
767
768 return 0;
769}
770
771static int post_one_send(struct rxe_qp *qp, struct ib_send_wr *ibwr,
772 unsigned int mask, u32 length)
773{
774 int err;
775 struct rxe_sq *sq = &qp->sq;
776 struct rxe_send_wqe *send_wqe;
777 unsigned long flags;
778
779 err = validate_send_wr(qp, ibwr, mask, length);
780 if (err)
781 return err;
782
783 spin_lock_irqsave(&qp->sq.sq_lock, flags);
784
785 if (unlikely(queue_full(sq->queue))) {
786 err = -ENOMEM;
787 goto err1;
788 }
789
790 send_wqe = producer_addr(sq->queue);
791
792 err = init_send_wqe(qp, ibwr, mask, length, send_wqe);
793 if (unlikely(err))
794 goto err1;
795
796
797
798
799
800 smp_wmb();
801
802 advance_producer(sq->queue);
803 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
804
805 return 0;
806
807err1:
808 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
809 return err;
810}
811
812static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr,
813 struct ib_send_wr **bad_wr)
814{
815 int err = 0;
816 unsigned int mask;
817 unsigned int length = 0;
818 int i;
819 int must_sched;
820
821 while (wr) {
822 mask = wr_opcode_mask(wr->opcode, qp);
823 if (unlikely(!mask)) {
824 err = -EINVAL;
825 *bad_wr = wr;
826 break;
827 }
828
829 if (unlikely((wr->send_flags & IB_SEND_INLINE) &&
830 !(mask & WR_INLINE_MASK))) {
831 err = -EINVAL;
832 *bad_wr = wr;
833 break;
834 }
835
836 length = 0;
837 for (i = 0; i < wr->num_sge; i++)
838 length += wr->sg_list[i].length;
839
840 err = post_one_send(qp, wr, mask, length);
841
842 if (err) {
843 *bad_wr = wr;
844 break;
845 }
846 wr = wr->next;
847 }
848
849
850
851
852
853 must_sched = (qp_type(qp) == IB_QPT_GSI) ||
854 (queue_count(qp->sq.queue) > 1);
855
856 rxe_run_task(&qp->req.task, must_sched);
857
858 return err;
859}
860
861static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
862 struct ib_send_wr **bad_wr)
863{
864 struct rxe_qp *qp = to_rqp(ibqp);
865
866 if (unlikely(!qp->valid)) {
867 *bad_wr = wr;
868 return -EINVAL;
869 }
870
871 if (unlikely(qp->req.state < QP_STATE_READY)) {
872 *bad_wr = wr;
873 return -EINVAL;
874 }
875
876 if (qp->is_user) {
877
878 rxe_run_task(&qp->req.task, 0);
879 return 0;
880 } else
881 return rxe_post_send_kernel(qp, wr, bad_wr);
882}
883
884static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
885 struct ib_recv_wr **bad_wr)
886{
887 int err = 0;
888 struct rxe_qp *qp = to_rqp(ibqp);
889 struct rxe_rq *rq = &qp->rq;
890 unsigned long flags;
891
892 if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) {
893 *bad_wr = wr;
894 err = -EINVAL;
895 goto err1;
896 }
897
898 if (unlikely(qp->srq)) {
899 *bad_wr = wr;
900 err = -EINVAL;
901 goto err1;
902 }
903
904 spin_lock_irqsave(&rq->producer_lock, flags);
905
906 while (wr) {
907 err = post_one_recv(rq, wr);
908 if (unlikely(err)) {
909 *bad_wr = wr;
910 break;
911 }
912 wr = wr->next;
913 }
914
915 spin_unlock_irqrestore(&rq->producer_lock, flags);
916
917err1:
918 return err;
919}
920
921static struct ib_cq *rxe_create_cq(struct ib_device *dev,
922 const struct ib_cq_init_attr *attr,
923 struct ib_ucontext *context,
924 struct ib_udata *udata)
925{
926 int err;
927 struct rxe_dev *rxe = to_rdev(dev);
928 struct rxe_cq *cq;
929
930 if (attr->flags)
931 return ERR_PTR(-EINVAL);
932
933 err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector, udata);
934 if (err)
935 goto err1;
936
937 cq = rxe_alloc(&rxe->cq_pool);
938 if (!cq) {
939 err = -ENOMEM;
940 goto err1;
941 }
942
943 err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector,
944 context, udata);
945 if (err)
946 goto err2;
947
948 return &cq->ibcq;
949
950err2:
951 rxe_drop_ref(cq);
952err1:
953 return ERR_PTR(err);
954}
955
956static int rxe_destroy_cq(struct ib_cq *ibcq)
957{
958 struct rxe_cq *cq = to_rcq(ibcq);
959
960 rxe_drop_ref(cq);
961 return 0;
962}
963
964static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
965{
966 int err;
967 struct rxe_cq *cq = to_rcq(ibcq);
968 struct rxe_dev *rxe = to_rdev(ibcq->device);
969
970 err = rxe_cq_chk_attr(rxe, cq, cqe, 0, udata);
971 if (err)
972 goto err1;
973
974 err = rxe_cq_resize_queue(cq, cqe, udata);
975 if (err)
976 goto err1;
977
978 return 0;
979
980err1:
981 return err;
982}
983
984static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
985{
986 int i;
987 struct rxe_cq *cq = to_rcq(ibcq);
988 struct rxe_cqe *cqe;
989 unsigned long flags;
990
991 spin_lock_irqsave(&cq->cq_lock, flags);
992 for (i = 0; i < num_entries; i++) {
993 cqe = queue_head(cq->queue);
994 if (!cqe)
995 break;
996
997 memcpy(wc++, &cqe->ibwc, sizeof(*wc));
998 advance_consumer(cq->queue);
999 }
1000 spin_unlock_irqrestore(&cq->cq_lock, flags);
1001
1002 return i;
1003}
1004
1005static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
1006{
1007 struct rxe_cq *cq = to_rcq(ibcq);
1008 int count = queue_count(cq->queue);
1009
1010 return (count > wc_cnt) ? wc_cnt : count;
1011}
1012
1013static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
1014{
1015 struct rxe_cq *cq = to_rcq(ibcq);
1016 unsigned long irq_flags;
1017 int ret = 0;
1018
1019 spin_lock_irqsave(&cq->cq_lock, irq_flags);
1020 if (cq->notify != IB_CQ_NEXT_COMP)
1021 cq->notify = flags & IB_CQ_SOLICITED_MASK;
1022
1023 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !queue_empty(cq->queue))
1024 ret = 1;
1025
1026 spin_unlock_irqrestore(&cq->cq_lock, irq_flags);
1027
1028 return ret;
1029}
1030
1031static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
1032{
1033 struct rxe_dev *rxe = to_rdev(ibpd->device);
1034 struct rxe_pd *pd = to_rpd(ibpd);
1035 struct rxe_mem *mr;
1036 int err;
1037
1038 mr = rxe_alloc(&rxe->mr_pool);
1039 if (!mr) {
1040 err = -ENOMEM;
1041 goto err1;
1042 }
1043
1044 rxe_add_index(mr);
1045
1046 rxe_add_ref(pd);
1047
1048 err = rxe_mem_init_dma(rxe, pd, access, mr);
1049 if (err)
1050 goto err2;
1051
1052 return &mr->ibmr;
1053
1054err2:
1055 rxe_drop_ref(pd);
1056 rxe_drop_index(mr);
1057 rxe_drop_ref(mr);
1058err1:
1059 return ERR_PTR(err);
1060}
1061
1062static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
1063 u64 start,
1064 u64 length,
1065 u64 iova,
1066 int access, struct ib_udata *udata)
1067{
1068 int err;
1069 struct rxe_dev *rxe = to_rdev(ibpd->device);
1070 struct rxe_pd *pd = to_rpd(ibpd);
1071 struct rxe_mem *mr;
1072
1073 mr = rxe_alloc(&rxe->mr_pool);
1074 if (!mr) {
1075 err = -ENOMEM;
1076 goto err2;
1077 }
1078
1079 rxe_add_index(mr);
1080
1081 rxe_add_ref(pd);
1082
1083 err = rxe_mem_init_user(rxe, pd, start, length, iova,
1084 access, udata, mr);
1085 if (err)
1086 goto err3;
1087
1088 return &mr->ibmr;
1089
1090err3:
1091 rxe_drop_ref(pd);
1092 rxe_drop_index(mr);
1093 rxe_drop_ref(mr);
1094err2:
1095 return ERR_PTR(err);
1096}
1097
1098static int rxe_dereg_mr(struct ib_mr *ibmr)
1099{
1100 struct rxe_mem *mr = to_rmr(ibmr);
1101
1102 mr->state = RXE_MEM_STATE_ZOMBIE;
1103 rxe_drop_ref(mr->pd);
1104 rxe_drop_index(mr);
1105 rxe_drop_ref(mr);
1106 return 0;
1107}
1108
1109static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd,
1110 enum ib_mr_type mr_type,
1111 u32 max_num_sg)
1112{
1113 struct rxe_dev *rxe = to_rdev(ibpd->device);
1114 struct rxe_pd *pd = to_rpd(ibpd);
1115 struct rxe_mem *mr;
1116 int err;
1117
1118 if (mr_type != IB_MR_TYPE_MEM_REG)
1119 return ERR_PTR(-EINVAL);
1120
1121 mr = rxe_alloc(&rxe->mr_pool);
1122 if (!mr) {
1123 err = -ENOMEM;
1124 goto err1;
1125 }
1126
1127 rxe_add_index(mr);
1128
1129 rxe_add_ref(pd);
1130
1131 err = rxe_mem_init_fast(rxe, pd, max_num_sg, mr);
1132 if (err)
1133 goto err2;
1134
1135 return &mr->ibmr;
1136
1137err2:
1138 rxe_drop_ref(pd);
1139 rxe_drop_index(mr);
1140 rxe_drop_ref(mr);
1141err1:
1142 return ERR_PTR(err);
1143}
1144
1145static int rxe_set_page(struct ib_mr *ibmr, u64 addr)
1146{
1147 struct rxe_mem *mr = to_rmr(ibmr);
1148 struct rxe_map *map;
1149 struct rxe_phys_buf *buf;
1150
1151 if (unlikely(mr->nbuf == mr->num_buf))
1152 return -ENOMEM;
1153
1154 map = mr->map[mr->nbuf / RXE_BUF_PER_MAP];
1155 buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP];
1156
1157 buf->addr = addr;
1158 buf->size = ibmr->page_size;
1159 mr->nbuf++;
1160
1161 return 0;
1162}
1163
1164static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
1165 int sg_nents, unsigned int *sg_offset)
1166{
1167 struct rxe_mem *mr = to_rmr(ibmr);
1168 int n;
1169
1170 mr->nbuf = 0;
1171
1172 n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page);
1173
1174 mr->va = ibmr->iova;
1175 mr->iova = ibmr->iova;
1176 mr->length = ibmr->length;
1177 mr->page_shift = ilog2(ibmr->page_size);
1178 mr->page_mask = ibmr->page_size - 1;
1179 mr->offset = mr->iova & mr->page_mask;
1180
1181 return n;
1182}
1183
1184static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1185{
1186 int err;
1187 struct rxe_dev *rxe = to_rdev(ibqp->device);
1188 struct rxe_qp *qp = to_rqp(ibqp);
1189 struct rxe_mc_grp *grp;
1190
1191
1192 err = rxe_mcast_get_grp(rxe, mgid, &grp);
1193 if (err)
1194 return err;
1195
1196 err = rxe_mcast_add_grp_elem(rxe, qp, grp);
1197
1198 rxe_drop_ref(grp);
1199 return err;
1200}
1201
1202static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1203{
1204 struct rxe_dev *rxe = to_rdev(ibqp->device);
1205 struct rxe_qp *qp = to_rqp(ibqp);
1206
1207 return rxe_mcast_drop_grp_elem(rxe, qp, mgid);
1208}
1209
1210static ssize_t rxe_show_parent(struct device *device,
1211 struct device_attribute *attr, char *buf)
1212{
1213 struct rxe_dev *rxe = container_of(device, struct rxe_dev,
1214 ib_dev.dev);
1215
1216 return snprintf(buf, 16, "%s\n", rxe_parent_name(rxe, 1));
1217}
1218
1219static DEVICE_ATTR(parent, S_IRUGO, rxe_show_parent, NULL);
1220
1221static struct device_attribute *rxe_dev_attributes[] = {
1222 &dev_attr_parent,
1223};
1224
1225int rxe_register_device(struct rxe_dev *rxe)
1226{
1227 int err;
1228 int i;
1229 struct ib_device *dev = &rxe->ib_dev;
1230
1231 strlcpy(dev->name, "rxe%d", IB_DEVICE_NAME_MAX);
1232 strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
1233
1234 dev->owner = THIS_MODULE;
1235 dev->node_type = RDMA_NODE_IB_CA;
1236 dev->phys_port_cnt = 1;
1237 dev->num_comp_vectors = num_possible_cpus();
1238 dev->dev.parent = rxe_dma_device(rxe);
1239 dev->local_dma_lkey = 0;
1240 addrconf_addr_eui48((unsigned char *)&dev->node_guid,
1241 rxe->ndev->dev_addr);
1242 dev->dev.dma_ops = &dma_virt_ops;
1243
1244 dev->uverbs_abi_ver = RXE_UVERBS_ABI_VERSION;
1245 dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT)
1246 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)
1247 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE)
1248 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT)
1249 | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD)
1250 | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD)
1251 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ)
1252 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ)
1253 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ)
1254 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ)
1255 | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV)
1256 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP)
1257 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP)
1258 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP)
1259 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP)
1260 | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND)
1261 | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV)
1262 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ)
1263 | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ)
1264 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ)
1265 | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ)
1266 | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ)
1267 | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)
1268 | BIT_ULL(IB_USER_VERBS_CMD_REG_MR)
1269 | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR)
1270 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH)
1271 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH)
1272 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH)
1273 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH)
1274 | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST)
1275 | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST)
1276 ;
1277
1278 dev->query_device = rxe_query_device;
1279 dev->modify_device = rxe_modify_device;
1280 dev->query_port = rxe_query_port;
1281 dev->modify_port = rxe_modify_port;
1282 dev->get_link_layer = rxe_get_link_layer;
1283 dev->query_gid = rxe_query_gid;
1284 dev->get_netdev = rxe_get_netdev;
1285 dev->add_gid = rxe_add_gid;
1286 dev->del_gid = rxe_del_gid;
1287 dev->query_pkey = rxe_query_pkey;
1288 dev->alloc_ucontext = rxe_alloc_ucontext;
1289 dev->dealloc_ucontext = rxe_dealloc_ucontext;
1290 dev->mmap = rxe_mmap;
1291 dev->get_port_immutable = rxe_port_immutable;
1292 dev->alloc_pd = rxe_alloc_pd;
1293 dev->dealloc_pd = rxe_dealloc_pd;
1294 dev->create_ah = rxe_create_ah;
1295 dev->modify_ah = rxe_modify_ah;
1296 dev->query_ah = rxe_query_ah;
1297 dev->destroy_ah = rxe_destroy_ah;
1298 dev->create_srq = rxe_create_srq;
1299 dev->modify_srq = rxe_modify_srq;
1300 dev->query_srq = rxe_query_srq;
1301 dev->destroy_srq = rxe_destroy_srq;
1302 dev->post_srq_recv = rxe_post_srq_recv;
1303 dev->create_qp = rxe_create_qp;
1304 dev->modify_qp = rxe_modify_qp;
1305 dev->query_qp = rxe_query_qp;
1306 dev->destroy_qp = rxe_destroy_qp;
1307 dev->post_send = rxe_post_send;
1308 dev->post_recv = rxe_post_recv;
1309 dev->create_cq = rxe_create_cq;
1310 dev->destroy_cq = rxe_destroy_cq;
1311 dev->resize_cq = rxe_resize_cq;
1312 dev->poll_cq = rxe_poll_cq;
1313 dev->peek_cq = rxe_peek_cq;
1314 dev->req_notify_cq = rxe_req_notify_cq;
1315 dev->get_dma_mr = rxe_get_dma_mr;
1316 dev->reg_user_mr = rxe_reg_user_mr;
1317 dev->dereg_mr = rxe_dereg_mr;
1318 dev->alloc_mr = rxe_alloc_mr;
1319 dev->map_mr_sg = rxe_map_mr_sg;
1320 dev->attach_mcast = rxe_attach_mcast;
1321 dev->detach_mcast = rxe_detach_mcast;
1322 dev->get_hw_stats = rxe_ib_get_hw_stats;
1323 dev->alloc_hw_stats = rxe_ib_alloc_hw_stats;
1324
1325 rxe->tfm = crypto_alloc_shash("crc32", 0, 0);
1326 if (IS_ERR(rxe->tfm)) {
1327 pr_err("failed to allocate crc algorithm err:%ld\n",
1328 PTR_ERR(rxe->tfm));
1329 return PTR_ERR(rxe->tfm);
1330 }
1331
1332 err = ib_register_device(dev, NULL);
1333 if (err) {
1334 pr_warn("rxe_register_device failed, err = %d\n", err);
1335 goto err1;
1336 }
1337
1338 for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) {
1339 err = device_create_file(&dev->dev, rxe_dev_attributes[i]);
1340 if (err) {
1341 pr_warn("device_create_file failed, i = %d, err = %d\n",
1342 i, err);
1343 goto err2;
1344 }
1345 }
1346
1347 return 0;
1348
1349err2:
1350 ib_unregister_device(dev);
1351err1:
1352 crypto_free_shash(rxe->tfm);
1353
1354 return err;
1355}
1356
1357int rxe_unregister_device(struct rxe_dev *rxe)
1358{
1359 int i;
1360 struct ib_device *dev = &rxe->ib_dev;
1361
1362 for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i)
1363 device_remove_file(&dev->dev, rxe_dev_attributes[i]);
1364
1365 ib_unregister_device(dev);
1366
1367 return 0;
1368}
1369
