Loading...
Note: File does not exist in v3.15.
1/*
2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34#include "rxe.h"
35#include "rxe_loc.h"
36#include "rxe_queue.h"
37
38static int rxe_query_device(struct ib_device *dev,
39 struct ib_device_attr *attr,
40 struct ib_udata *uhw)
41{
42 struct rxe_dev *rxe = to_rdev(dev);
43
44 if (uhw->inlen || uhw->outlen)
45 return -EINVAL;
46
47 *attr = rxe->attr;
48 return 0;
49}
50
51static void rxe_eth_speed_to_ib_speed(int speed, u8 *active_speed,
52 u8 *active_width)
53{
54 if (speed <= 1000) {
55 *active_width = IB_WIDTH_1X;
56 *active_speed = IB_SPEED_SDR;
57 } else if (speed <= 10000) {
58 *active_width = IB_WIDTH_1X;
59 *active_speed = IB_SPEED_FDR10;
60 } else if (speed <= 20000) {
61 *active_width = IB_WIDTH_4X;
62 *active_speed = IB_SPEED_DDR;
63 } else if (speed <= 30000) {
64 *active_width = IB_WIDTH_4X;
65 *active_speed = IB_SPEED_QDR;
66 } else if (speed <= 40000) {
67 *active_width = IB_WIDTH_4X;
68 *active_speed = IB_SPEED_FDR10;
69 } else {
70 *active_width = IB_WIDTH_4X;
71 *active_speed = IB_SPEED_EDR;
72 }
73}
74
75static int rxe_query_port(struct ib_device *dev,
76 u8 port_num, struct ib_port_attr *attr)
77{
78 struct rxe_dev *rxe = to_rdev(dev);
79 struct rxe_port *port;
80 u32 speed;
81
82 if (unlikely(port_num != 1)) {
83 pr_warn("invalid port_number %d\n", port_num);
84 goto err1;
85 }
86
87 port = &rxe->port;
88
89 *attr = port->attr;
90
91 mutex_lock(&rxe->usdev_lock);
92 if (rxe->ndev->ethtool_ops->get_link_ksettings) {
93 struct ethtool_link_ksettings ks;
94
95 rxe->ndev->ethtool_ops->get_link_ksettings(rxe->ndev, &ks);
96 speed = ks.base.speed;
97 } else if (rxe->ndev->ethtool_ops->get_settings) {
98 struct ethtool_cmd cmd;
99
100 rxe->ndev->ethtool_ops->get_settings(rxe->ndev, &cmd);
101 speed = cmd.speed;
102 } else {
103 pr_warn("%s speed is unknown, defaulting to 1000\n",
104 rxe->ndev->name);
105 speed = 1000;
106 }
107 rxe_eth_speed_to_ib_speed(speed, &attr->active_speed,
108 &attr->active_width);
109 mutex_unlock(&rxe->usdev_lock);
110
111 return 0;
112
113err1:
114 return -EINVAL;
115}
116
117static int rxe_query_gid(struct ib_device *device,
118 u8 port_num, int index, union ib_gid *gid)
119{
120 int ret;
121
122 if (index > RXE_PORT_GID_TBL_LEN)
123 return -EINVAL;
124
125 ret = ib_get_cached_gid(device, port_num, index, gid, NULL);
126 if (ret == -EAGAIN) {
127 memcpy(gid, &zgid, sizeof(*gid));
128 return 0;
129 }
130
131 return ret;
132}
133
134static int rxe_add_gid(struct ib_device *device, u8 port_num, unsigned int
135 index, const union ib_gid *gid,
136 const struct ib_gid_attr *attr, void **context)
137{
138 if (index >= RXE_PORT_GID_TBL_LEN)
139 return -EINVAL;
140 return 0;
141}
142
143static int rxe_del_gid(struct ib_device *device, u8 port_num, unsigned int
144 index, void **context)
145{
146 if (index >= RXE_PORT_GID_TBL_LEN)
147 return -EINVAL;
148 return 0;
149}
150
151static struct net_device *rxe_get_netdev(struct ib_device *device,
152 u8 port_num)
153{
154 struct rxe_dev *rxe = to_rdev(device);
155
156 if (rxe->ndev) {
157 dev_hold(rxe->ndev);
158 return rxe->ndev;
159 }
160
161 return NULL;
162}
163
164static int rxe_query_pkey(struct ib_device *device,
165 u8 port_num, u16 index, u16 *pkey)
166{
167 struct rxe_dev *rxe = to_rdev(device);
168 struct rxe_port *port;
169
170 if (unlikely(port_num != 1)) {
171 dev_warn(device->dma_device, "invalid port_num = %d\n",
172 port_num);
173 goto err1;
174 }
175
176 port = &rxe->port;
177
178 if (unlikely(index >= port->attr.pkey_tbl_len)) {
179 dev_warn(device->dma_device, "invalid index = %d\n",
180 index);
181 goto err1;
182 }
183
184 *pkey = port->pkey_tbl[index];
185 return 0;
186
187err1:
188 return -EINVAL;
189}
190
191static int rxe_modify_device(struct ib_device *dev,
192 int mask, struct ib_device_modify *attr)
193{
194 struct rxe_dev *rxe = to_rdev(dev);
195
196 if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
197 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
198
199 if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
200 memcpy(rxe->ib_dev.node_desc,
201 attr->node_desc, sizeof(rxe->ib_dev.node_desc));
202 }
203
204 return 0;
205}
206
207static int rxe_modify_port(struct ib_device *dev,
208 u8 port_num, int mask, struct ib_port_modify *attr)
209{
210 struct rxe_dev *rxe = to_rdev(dev);
211 struct rxe_port *port;
212
213 if (unlikely(port_num != 1)) {
214 pr_warn("invalid port_num = %d\n", port_num);
215 goto err1;
216 }
217
218 port = &rxe->port;
219
220 port->attr.port_cap_flags |= attr->set_port_cap_mask;
221 port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
222
223 if (mask & IB_PORT_RESET_QKEY_CNTR)
224 port->attr.qkey_viol_cntr = 0;
225
226 return 0;
227
228err1:
229 return -EINVAL;
230}
231
232static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
233 u8 port_num)
234{
235 struct rxe_dev *rxe = to_rdev(dev);
236
237 return rxe->ifc_ops->link_layer(rxe, port_num);
238}
239
240static struct ib_ucontext *rxe_alloc_ucontext(struct ib_device *dev,
241 struct ib_udata *udata)
242{
243 struct rxe_dev *rxe = to_rdev(dev);
244 struct rxe_ucontext *uc;
245
246 uc = rxe_alloc(&rxe->uc_pool);
247 return uc ? &uc->ibuc : ERR_PTR(-ENOMEM);
248}
249
250static int rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
251{
252 struct rxe_ucontext *uc = to_ruc(ibuc);
253
254 rxe_drop_ref(uc);
255 return 0;
256}
257
258static int rxe_port_immutable(struct ib_device *dev, u8 port_num,
259 struct ib_port_immutable *immutable)
260{
261 int err;
262 struct ib_port_attr attr;
263
264 err = rxe_query_port(dev, port_num, &attr);
265 if (err)
266 return err;
267
268 immutable->pkey_tbl_len = attr.pkey_tbl_len;
269 immutable->gid_tbl_len = attr.gid_tbl_len;
270 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
271 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
272
273 return 0;
274}
275
276static struct ib_pd *rxe_alloc_pd(struct ib_device *dev,
277 struct ib_ucontext *context,
278 struct ib_udata *udata)
279{
280 struct rxe_dev *rxe = to_rdev(dev);
281 struct rxe_pd *pd;
282
283 pd = rxe_alloc(&rxe->pd_pool);
284 return pd ? &pd->ibpd : ERR_PTR(-ENOMEM);
285}
286
287static int rxe_dealloc_pd(struct ib_pd *ibpd)
288{
289 struct rxe_pd *pd = to_rpd(ibpd);
290
291 rxe_drop_ref(pd);
292 return 0;
293}
294
295static int rxe_init_av(struct rxe_dev *rxe, struct ib_ah_attr *attr,
296 struct rxe_av *av)
297{
298 int err;
299 union ib_gid sgid;
300 struct ib_gid_attr sgid_attr;
301
302 err = ib_get_cached_gid(&rxe->ib_dev, attr->port_num,
303 attr->grh.sgid_index, &sgid,
304 &sgid_attr);
305 if (err) {
306 pr_err("Failed to query sgid. err = %d\n", err);
307 return err;
308 }
309
310 err = rxe_av_from_attr(rxe, attr->port_num, av, attr);
311 if (!err)
312 err = rxe_av_fill_ip_info(rxe, av, attr, &sgid_attr, &sgid);
313
314 if (sgid_attr.ndev)
315 dev_put(sgid_attr.ndev);
316 return err;
317}
318
319static struct ib_ah *rxe_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr,
320 struct ib_udata *udata)
321
322{
323 int err;
324 struct rxe_dev *rxe = to_rdev(ibpd->device);
325 struct rxe_pd *pd = to_rpd(ibpd);
326 struct rxe_ah *ah;
327
328 err = rxe_av_chk_attr(rxe, attr);
329 if (err)
330 goto err1;
331
332 ah = rxe_alloc(&rxe->ah_pool);
333 if (!ah) {
334 err = -ENOMEM;
335 goto err1;
336 }
337
338 rxe_add_ref(pd);
339 ah->pd = pd;
340
341 err = rxe_init_av(rxe, attr, &ah->av);
342 if (err)
343 goto err2;
344
345 return &ah->ibah;
346
347err2:
348 rxe_drop_ref(pd);
349 rxe_drop_ref(ah);
350err1:
351 return ERR_PTR(err);
352}
353
354static int rxe_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
355{
356 int err;
357 struct rxe_dev *rxe = to_rdev(ibah->device);
358 struct rxe_ah *ah = to_rah(ibah);
359
360 err = rxe_av_chk_attr(rxe, attr);
361 if (err)
362 return err;
363
364 err = rxe_init_av(rxe, attr, &ah->av);
365 if (err)
366 return err;
367
368 return 0;
369}
370
371static int rxe_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
372{
373 struct rxe_dev *rxe = to_rdev(ibah->device);
374 struct rxe_ah *ah = to_rah(ibah);
375
376 rxe_av_to_attr(rxe, &ah->av, attr);
377 return 0;
378}
379
380static int rxe_destroy_ah(struct ib_ah *ibah)
381{
382 struct rxe_ah *ah = to_rah(ibah);
383
384 rxe_drop_ref(ah->pd);
385 rxe_drop_ref(ah);
386 return 0;
387}
388
389static int post_one_recv(struct rxe_rq *rq, struct ib_recv_wr *ibwr)
390{
391 int err;
392 int i;
393 u32 length;
394 struct rxe_recv_wqe *recv_wqe;
395 int num_sge = ibwr->num_sge;
396
397 if (unlikely(queue_full(rq->queue))) {
398 err = -ENOMEM;
399 goto err1;
400 }
401
402 if (unlikely(num_sge > rq->max_sge)) {
403 err = -EINVAL;
404 goto err1;
405 }
406
407 length = 0;
408 for (i = 0; i < num_sge; i++)
409 length += ibwr->sg_list[i].length;
410
411 recv_wqe = producer_addr(rq->queue);
412 recv_wqe->wr_id = ibwr->wr_id;
413 recv_wqe->num_sge = num_sge;
414
415 memcpy(recv_wqe->dma.sge, ibwr->sg_list,
416 num_sge * sizeof(struct ib_sge));
417
418 recv_wqe->dma.length = length;
419 recv_wqe->dma.resid = length;
420 recv_wqe->dma.num_sge = num_sge;
421 recv_wqe->dma.cur_sge = 0;
422 recv_wqe->dma.sge_offset = 0;
423
424 /* make sure all changes to the work queue are written before we
425 * update the producer pointer
426 */
427 smp_wmb();
428
429 advance_producer(rq->queue);
430 return 0;
431
432err1:
433 return err;
434}
435
436static struct ib_srq *rxe_create_srq(struct ib_pd *ibpd,
437 struct ib_srq_init_attr *init,
438 struct ib_udata *udata)
439{
440 int err;
441 struct rxe_dev *rxe = to_rdev(ibpd->device);
442 struct rxe_pd *pd = to_rpd(ibpd);
443 struct rxe_srq *srq;
444 struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
445
446 err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK);
447 if (err)
448 goto err1;
449
450 srq = rxe_alloc(&rxe->srq_pool);
451 if (!srq) {
452 err = -ENOMEM;
453 goto err1;
454 }
455
456 rxe_add_index(srq);
457 rxe_add_ref(pd);
458 srq->pd = pd;
459
460 err = rxe_srq_from_init(rxe, srq, init, context, udata);
461 if (err)
462 goto err2;
463
464 return &srq->ibsrq;
465
466err2:
467 rxe_drop_ref(pd);
468 rxe_drop_index(srq);
469 rxe_drop_ref(srq);
470err1:
471 return ERR_PTR(err);
472}
473
474static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
475 enum ib_srq_attr_mask mask,
476 struct ib_udata *udata)
477{
478 int err;
479 struct rxe_srq *srq = to_rsrq(ibsrq);
480 struct rxe_dev *rxe = to_rdev(ibsrq->device);
481
482 err = rxe_srq_chk_attr(rxe, srq, attr, mask);
483 if (err)
484 goto err1;
485
486 err = rxe_srq_from_attr(rxe, srq, attr, mask, udata);
487 if (err)
488 goto err1;
489
490 return 0;
491
492err1:
493 return err;
494}
495
496static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
497{
498 struct rxe_srq *srq = to_rsrq(ibsrq);
499
500 if (srq->error)
501 return -EINVAL;
502
503 attr->max_wr = srq->rq.queue->buf->index_mask;
504 attr->max_sge = srq->rq.max_sge;
505 attr->srq_limit = srq->limit;
506 return 0;
507}
508
509static int rxe_destroy_srq(struct ib_srq *ibsrq)
510{
511 struct rxe_srq *srq = to_rsrq(ibsrq);
512
513 if (srq->rq.queue)
514 rxe_queue_cleanup(srq->rq.queue);
515
516 rxe_drop_ref(srq->pd);
517 rxe_drop_index(srq);
518 rxe_drop_ref(srq);
519
520 return 0;
521}
522
523static int rxe_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
524 struct ib_recv_wr **bad_wr)
525{
526 int err = 0;
527 unsigned long flags;
528 struct rxe_srq *srq = to_rsrq(ibsrq);
529
530 spin_lock_irqsave(&srq->rq.producer_lock, flags);
531
532 while (wr) {
533 err = post_one_recv(&srq->rq, wr);
534 if (unlikely(err))
535 break;
536 wr = wr->next;
537 }
538
539 spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
540
541 if (err)
542 *bad_wr = wr;
543
544 return err;
545}
546
547static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd,
548 struct ib_qp_init_attr *init,
549 struct ib_udata *udata)
550{
551 int err;
552 struct rxe_dev *rxe = to_rdev(ibpd->device);
553 struct rxe_pd *pd = to_rpd(ibpd);
554 struct rxe_qp *qp;
555
556 err = rxe_qp_chk_init(rxe, init);
557 if (err)
558 goto err1;
559
560 qp = rxe_alloc(&rxe->qp_pool);
561 if (!qp) {
562 err = -ENOMEM;
563 goto err1;
564 }
565
566 if (udata) {
567 if (udata->inlen) {
568 err = -EINVAL;
569 goto err2;
570 }
571 qp->is_user = 1;
572 }
573
574 rxe_add_index(qp);
575
576 err = rxe_qp_from_init(rxe, qp, pd, init, udata, ibpd);
577 if (err)
578 goto err3;
579
580 return &qp->ibqp;
581
582err3:
583 rxe_drop_index(qp);
584err2:
585 rxe_drop_ref(qp);
586err1:
587 return ERR_PTR(err);
588}
589
590static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
591 int mask, struct ib_udata *udata)
592{
593 int err;
594 struct rxe_dev *rxe = to_rdev(ibqp->device);
595 struct rxe_qp *qp = to_rqp(ibqp);
596
597 err = rxe_qp_chk_attr(rxe, qp, attr, mask);
598 if (err)
599 goto err1;
600
601 err = rxe_qp_from_attr(qp, attr, mask, udata);
602 if (err)
603 goto err1;
604
605 return 0;
606
607err1:
608 return err;
609}
610
611static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
612 int mask, struct ib_qp_init_attr *init)
613{
614 struct rxe_qp *qp = to_rqp(ibqp);
615
616 rxe_qp_to_init(qp, init);
617 rxe_qp_to_attr(qp, attr, mask);
618
619 return 0;
620}
621
622static int rxe_destroy_qp(struct ib_qp *ibqp)
623{
624 struct rxe_qp *qp = to_rqp(ibqp);
625
626 rxe_qp_destroy(qp);
627 rxe_drop_index(qp);
628 rxe_drop_ref(qp);
629 return 0;
630}
631
632static int validate_send_wr(struct rxe_qp *qp, struct ib_send_wr *ibwr,
633 unsigned int mask, unsigned int length)
634{
635 int num_sge = ibwr->num_sge;
636 struct rxe_sq *sq = &qp->sq;
637
638 if (unlikely(num_sge > sq->max_sge))
639 goto err1;
640
641 if (unlikely(mask & WR_ATOMIC_MASK)) {
642 if (length < 8)
643 goto err1;
644
645 if (atomic_wr(ibwr)->remote_addr & 0x7)
646 goto err1;
647 }
648
649 if (unlikely((ibwr->send_flags & IB_SEND_INLINE) &&
650 (length > sq->max_inline)))
651 goto err1;
652
653 return 0;
654
655err1:
656 return -EINVAL;
657}
658
659static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
660 struct ib_send_wr *ibwr)
661{
662 wr->wr_id = ibwr->wr_id;
663 wr->num_sge = ibwr->num_sge;
664 wr->opcode = ibwr->opcode;
665 wr->send_flags = ibwr->send_flags;
666
667 if (qp_type(qp) == IB_QPT_UD ||
668 qp_type(qp) == IB_QPT_SMI ||
669 qp_type(qp) == IB_QPT_GSI) {
670 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn;
671 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey;
672 if (qp_type(qp) == IB_QPT_GSI)
673 wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index;
674 if (wr->opcode == IB_WR_SEND_WITH_IMM)
675 wr->ex.imm_data = ibwr->ex.imm_data;
676 } else {
677 switch (wr->opcode) {
678 case IB_WR_RDMA_WRITE_WITH_IMM:
679 wr->ex.imm_data = ibwr->ex.imm_data;
680 case IB_WR_RDMA_READ:
681 case IB_WR_RDMA_WRITE:
682 wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
683 wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey;
684 break;
685 case IB_WR_SEND_WITH_IMM:
686 wr->ex.imm_data = ibwr->ex.imm_data;
687 break;
688 case IB_WR_SEND_WITH_INV:
689 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
690 break;
691 case IB_WR_ATOMIC_CMP_AND_SWP:
692 case IB_WR_ATOMIC_FETCH_AND_ADD:
693 wr->wr.atomic.remote_addr =
694 atomic_wr(ibwr)->remote_addr;
695 wr->wr.atomic.compare_add =
696 atomic_wr(ibwr)->compare_add;
697 wr->wr.atomic.swap = atomic_wr(ibwr)->swap;
698 wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey;
699 break;
700 case IB_WR_LOCAL_INV:
701 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
702 break;
703 case IB_WR_REG_MR:
704 wr->wr.reg.mr = reg_wr(ibwr)->mr;
705 wr->wr.reg.key = reg_wr(ibwr)->key;
706 wr->wr.reg.access = reg_wr(ibwr)->access;
707 break;
708 default:
709 break;
710 }
711 }
712}
713
714static int init_send_wqe(struct rxe_qp *qp, struct ib_send_wr *ibwr,
715 unsigned int mask, unsigned int length,
716 struct rxe_send_wqe *wqe)
717{
718 int num_sge = ibwr->num_sge;
719 struct ib_sge *sge;
720 int i;
721 u8 *p;
722
723 init_send_wr(qp, &wqe->wr, ibwr);
724
725 if (qp_type(qp) == IB_QPT_UD ||
726 qp_type(qp) == IB_QPT_SMI ||
727 qp_type(qp) == IB_QPT_GSI)
728 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av));
729
730 if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) {
731 p = wqe->dma.inline_data;
732
733 sge = ibwr->sg_list;
734 for (i = 0; i < num_sge; i++, sge++) {
735 if (qp->is_user && copy_from_user(p, (__user void *)
736 (uintptr_t)sge->addr, sge->length))
737 return -EFAULT;
738
739 else if (!qp->is_user)
740 memcpy(p, (void *)(uintptr_t)sge->addr,
741 sge->length);
742
743 p += sge->length;
744 }
745 } else if (mask & WR_REG_MASK) {
746 wqe->mask = mask;
747 wqe->state = wqe_state_posted;
748 return 0;
749 } else
750 memcpy(wqe->dma.sge, ibwr->sg_list,
751 num_sge * sizeof(struct ib_sge));
752
753 wqe->iova = (mask & WR_ATOMIC_MASK) ?
754 atomic_wr(ibwr)->remote_addr :
755 rdma_wr(ibwr)->remote_addr;
756 wqe->mask = mask;
757 wqe->dma.length = length;
758 wqe->dma.resid = length;
759 wqe->dma.num_sge = num_sge;
760 wqe->dma.cur_sge = 0;
761 wqe->dma.sge_offset = 0;
762 wqe->state = wqe_state_posted;
763 wqe->ssn = atomic_add_return(1, &qp->ssn);
764
765 return 0;
766}
767
768static int post_one_send(struct rxe_qp *qp, struct ib_send_wr *ibwr,
769 unsigned int mask, u32 length)
770{
771 int err;
772 struct rxe_sq *sq = &qp->sq;
773 struct rxe_send_wqe *send_wqe;
774 unsigned long flags;
775
776 err = validate_send_wr(qp, ibwr, mask, length);
777 if (err)
778 return err;
779
780 spin_lock_irqsave(&qp->sq.sq_lock, flags);
781
782 if (unlikely(queue_full(sq->queue))) {
783 err = -ENOMEM;
784 goto err1;
785 }
786
787 send_wqe = producer_addr(sq->queue);
788
789 err = init_send_wqe(qp, ibwr, mask, length, send_wqe);
790 if (unlikely(err))
791 goto err1;
792
793 /*
794 * make sure all changes to the work queue are
795 * written before we update the producer pointer
796 */
797 smp_wmb();
798
799 advance_producer(sq->queue);
800 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
801
802 return 0;
803
804err1:
805 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
806 return err;
807}
808
809static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr,
810 struct ib_send_wr **bad_wr)
811{
812 int err = 0;
813 unsigned int mask;
814 unsigned int length = 0;
815 int i;
816 int must_sched;
817
818 while (wr) {
819 mask = wr_opcode_mask(wr->opcode, qp);
820 if (unlikely(!mask)) {
821 err = -EINVAL;
822 *bad_wr = wr;
823 break;
824 }
825
826 if (unlikely((wr->send_flags & IB_SEND_INLINE) &&
827 !(mask & WR_INLINE_MASK))) {
828 err = -EINVAL;
829 *bad_wr = wr;
830 break;
831 }
832
833 length = 0;
834 for (i = 0; i < wr->num_sge; i++)
835 length += wr->sg_list[i].length;
836
837 err = post_one_send(qp, wr, mask, length);
838
839 if (err) {
840 *bad_wr = wr;
841 break;
842 }
843 wr = wr->next;
844 }
845
846 /*
847 * Must sched in case of GSI QP because ib_send_mad() hold irq lock,
848 * and the requester call ip_local_out_sk() that takes spin_lock_bh.
849 */
850 must_sched = (qp_type(qp) == IB_QPT_GSI) ||
851 (queue_count(qp->sq.queue) > 1);
852
853 rxe_run_task(&qp->req.task, must_sched);
854
855 return err;
856}
857
858static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
859 struct ib_send_wr **bad_wr)
860{
861 struct rxe_qp *qp = to_rqp(ibqp);
862
863 if (unlikely(!qp->valid)) {
864 *bad_wr = wr;
865 return -EINVAL;
866 }
867
868 if (unlikely(qp->req.state < QP_STATE_READY)) {
869 *bad_wr = wr;
870 return -EINVAL;
871 }
872
873 if (qp->is_user) {
874 /* Utilize process context to do protocol processing */
875 rxe_run_task(&qp->req.task, 0);
876 return 0;
877 } else
878 return rxe_post_send_kernel(qp, wr, bad_wr);
879}
880
881static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
882 struct ib_recv_wr **bad_wr)
883{
884 int err = 0;
885 struct rxe_qp *qp = to_rqp(ibqp);
886 struct rxe_rq *rq = &qp->rq;
887 unsigned long flags;
888
889 if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) {
890 *bad_wr = wr;
891 err = -EINVAL;
892 goto err1;
893 }
894
895 if (unlikely(qp->srq)) {
896 *bad_wr = wr;
897 err = -EINVAL;
898 goto err1;
899 }
900
901 spin_lock_irqsave(&rq->producer_lock, flags);
902
903 while (wr) {
904 err = post_one_recv(rq, wr);
905 if (unlikely(err)) {
906 *bad_wr = wr;
907 break;
908 }
909 wr = wr->next;
910 }
911
912 spin_unlock_irqrestore(&rq->producer_lock, flags);
913
914err1:
915 return err;
916}
917
918static struct ib_cq *rxe_create_cq(struct ib_device *dev,
919 const struct ib_cq_init_attr *attr,
920 struct ib_ucontext *context,
921 struct ib_udata *udata)
922{
923 int err;
924 struct rxe_dev *rxe = to_rdev(dev);
925 struct rxe_cq *cq;
926
927 if (attr->flags)
928 return ERR_PTR(-EINVAL);
929
930 err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector, udata);
931 if (err)
932 goto err1;
933
934 cq = rxe_alloc(&rxe->cq_pool);
935 if (!cq) {
936 err = -ENOMEM;
937 goto err1;
938 }
939
940 err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector,
941 context, udata);
942 if (err)
943 goto err2;
944
945 return &cq->ibcq;
946
947err2:
948 rxe_drop_ref(cq);
949err1:
950 return ERR_PTR(err);
951}
952
953static int rxe_destroy_cq(struct ib_cq *ibcq)
954{
955 struct rxe_cq *cq = to_rcq(ibcq);
956
957 rxe_drop_ref(cq);
958 return 0;
959}
960
961static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
962{
963 int err;
964 struct rxe_cq *cq = to_rcq(ibcq);
965 struct rxe_dev *rxe = to_rdev(ibcq->device);
966
967 err = rxe_cq_chk_attr(rxe, cq, cqe, 0, udata);
968 if (err)
969 goto err1;
970
971 err = rxe_cq_resize_queue(cq, cqe, udata);
972 if (err)
973 goto err1;
974
975 return 0;
976
977err1:
978 return err;
979}
980
981static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
982{
983 int i;
984 struct rxe_cq *cq = to_rcq(ibcq);
985 struct rxe_cqe *cqe;
986 unsigned long flags;
987
988 spin_lock_irqsave(&cq->cq_lock, flags);
989 for (i = 0; i < num_entries; i++) {
990 cqe = queue_head(cq->queue);
991 if (!cqe)
992 break;
993
994 memcpy(wc++, &cqe->ibwc, sizeof(*wc));
995 advance_consumer(cq->queue);
996 }
997 spin_unlock_irqrestore(&cq->cq_lock, flags);
998
999 return i;
1000}
1001
1002static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
1003{
1004 struct rxe_cq *cq = to_rcq(ibcq);
1005 int count = queue_count(cq->queue);
1006
1007 return (count > wc_cnt) ? wc_cnt : count;
1008}
1009
1010static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
1011{
1012 struct rxe_cq *cq = to_rcq(ibcq);
1013 unsigned long irq_flags;
1014 int ret = 0;
1015
1016 spin_lock_irqsave(&cq->cq_lock, irq_flags);
1017 if (cq->notify != IB_CQ_NEXT_COMP)
1018 cq->notify = flags & IB_CQ_SOLICITED_MASK;
1019
1020 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !queue_empty(cq->queue))
1021 ret = 1;
1022
1023 spin_unlock_irqrestore(&cq->cq_lock, irq_flags);
1024
1025 return ret;
1026}
1027
1028static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
1029{
1030 struct rxe_dev *rxe = to_rdev(ibpd->device);
1031 struct rxe_pd *pd = to_rpd(ibpd);
1032 struct rxe_mem *mr;
1033 int err;
1034
1035 mr = rxe_alloc(&rxe->mr_pool);
1036 if (!mr) {
1037 err = -ENOMEM;
1038 goto err1;
1039 }
1040
1041 rxe_add_index(mr);
1042
1043 rxe_add_ref(pd);
1044
1045 err = rxe_mem_init_dma(rxe, pd, access, mr);
1046 if (err)
1047 goto err2;
1048
1049 return &mr->ibmr;
1050
1051err2:
1052 rxe_drop_ref(pd);
1053 rxe_drop_index(mr);
1054 rxe_drop_ref(mr);
1055err1:
1056 return ERR_PTR(err);
1057}
1058
1059static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
1060 u64 start,
1061 u64 length,
1062 u64 iova,
1063 int access, struct ib_udata *udata)
1064{
1065 int err;
1066 struct rxe_dev *rxe = to_rdev(ibpd->device);
1067 struct rxe_pd *pd = to_rpd(ibpd);
1068 struct rxe_mem *mr;
1069
1070 mr = rxe_alloc(&rxe->mr_pool);
1071 if (!mr) {
1072 err = -ENOMEM;
1073 goto err2;
1074 }
1075
1076 rxe_add_index(mr);
1077
1078 rxe_add_ref(pd);
1079
1080 err = rxe_mem_init_user(rxe, pd, start, length, iova,
1081 access, udata, mr);
1082 if (err)
1083 goto err3;
1084
1085 return &mr->ibmr;
1086
1087err3:
1088 rxe_drop_ref(pd);
1089 rxe_drop_index(mr);
1090 rxe_drop_ref(mr);
1091err2:
1092 return ERR_PTR(err);
1093}
1094
1095static int rxe_dereg_mr(struct ib_mr *ibmr)
1096{
1097 struct rxe_mem *mr = to_rmr(ibmr);
1098
1099 mr->state = RXE_MEM_STATE_ZOMBIE;
1100 rxe_drop_ref(mr->pd);
1101 rxe_drop_index(mr);
1102 rxe_drop_ref(mr);
1103 return 0;
1104}
1105
1106static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd,
1107 enum ib_mr_type mr_type,
1108 u32 max_num_sg)
1109{
1110 struct rxe_dev *rxe = to_rdev(ibpd->device);
1111 struct rxe_pd *pd = to_rpd(ibpd);
1112 struct rxe_mem *mr;
1113 int err;
1114
1115 if (mr_type != IB_MR_TYPE_MEM_REG)
1116 return ERR_PTR(-EINVAL);
1117
1118 mr = rxe_alloc(&rxe->mr_pool);
1119 if (!mr) {
1120 err = -ENOMEM;
1121 goto err1;
1122 }
1123
1124 rxe_add_index(mr);
1125
1126 rxe_add_ref(pd);
1127
1128 err = rxe_mem_init_fast(rxe, pd, max_num_sg, mr);
1129 if (err)
1130 goto err2;
1131
1132 return &mr->ibmr;
1133
1134err2:
1135 rxe_drop_ref(pd);
1136 rxe_drop_index(mr);
1137 rxe_drop_ref(mr);
1138err1:
1139 return ERR_PTR(err);
1140}
1141
1142static int rxe_set_page(struct ib_mr *ibmr, u64 addr)
1143{
1144 struct rxe_mem *mr = to_rmr(ibmr);
1145 struct rxe_map *map;
1146 struct rxe_phys_buf *buf;
1147
1148 if (unlikely(mr->nbuf == mr->num_buf))
1149 return -ENOMEM;
1150
1151 map = mr->map[mr->nbuf / RXE_BUF_PER_MAP];
1152 buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP];
1153
1154 buf->addr = addr;
1155 buf->size = ibmr->page_size;
1156 mr->nbuf++;
1157
1158 return 0;
1159}
1160
1161static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
1162 int sg_nents, unsigned int *sg_offset)
1163{
1164 struct rxe_mem *mr = to_rmr(ibmr);
1165 int n;
1166
1167 mr->nbuf = 0;
1168
1169 n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page);
1170
1171 mr->va = ibmr->iova;
1172 mr->iova = ibmr->iova;
1173 mr->length = ibmr->length;
1174 mr->page_shift = ilog2(ibmr->page_size);
1175 mr->page_mask = ibmr->page_size - 1;
1176 mr->offset = mr->iova & mr->page_mask;
1177
1178 return n;
1179}
1180
1181static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1182{
1183 int err;
1184 struct rxe_dev *rxe = to_rdev(ibqp->device);
1185 struct rxe_qp *qp = to_rqp(ibqp);
1186 struct rxe_mc_grp *grp;
1187
1188 /* takes a ref on grp if successful */
1189 err = rxe_mcast_get_grp(rxe, mgid, &grp);
1190 if (err)
1191 return err;
1192
1193 err = rxe_mcast_add_grp_elem(rxe, qp, grp);
1194
1195 rxe_drop_ref(grp);
1196 return err;
1197}
1198
1199static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1200{
1201 struct rxe_dev *rxe = to_rdev(ibqp->device);
1202 struct rxe_qp *qp = to_rqp(ibqp);
1203
1204 return rxe_mcast_drop_grp_elem(rxe, qp, mgid);
1205}
1206
1207static ssize_t rxe_show_parent(struct device *device,
1208 struct device_attribute *attr, char *buf)
1209{
1210 struct rxe_dev *rxe = container_of(device, struct rxe_dev,
1211 ib_dev.dev);
1212 char *name;
1213
1214 name = rxe->ifc_ops->parent_name(rxe, 1);
1215 return snprintf(buf, 16, "%s\n", name);
1216}
1217
1218static DEVICE_ATTR(parent, S_IRUGO, rxe_show_parent, NULL);
1219
1220static struct device_attribute *rxe_dev_attributes[] = {
1221 &dev_attr_parent,
1222};
1223
1224int rxe_register_device(struct rxe_dev *rxe)
1225{
1226 int err;
1227 int i;
1228 struct ib_device *dev = &rxe->ib_dev;
1229
1230 strlcpy(dev->name, "rxe%d", IB_DEVICE_NAME_MAX);
1231 strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
1232
1233 dev->owner = THIS_MODULE;
1234 dev->node_type = RDMA_NODE_IB_CA;
1235 dev->phys_port_cnt = 1;
1236 dev->num_comp_vectors = RXE_NUM_COMP_VECTORS;
1237 dev->dma_device = rxe->ifc_ops->dma_device(rxe);
1238 dev->local_dma_lkey = 0;
1239 dev->node_guid = rxe->ifc_ops->node_guid(rxe);
1240 dev->dma_ops = &rxe_dma_mapping_ops;
1241
1242 dev->uverbs_abi_ver = RXE_UVERBS_ABI_VERSION;
1243 dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT)
1244 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)
1245 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE)
1246 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT)
1247 | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD)
1248 | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD)
1249 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ)
1250 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ)
1251 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ)
1252 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ)
1253 | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV)
1254 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP)
1255 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP)
1256 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP)
1257 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP)
1258 | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND)
1259 | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV)
1260 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ)
1261 | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ)
1262 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ)
1263 | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ)
1264 | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ)
1265 | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)
1266 | BIT_ULL(IB_USER_VERBS_CMD_REG_MR)
1267 | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR)
1268 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH)
1269 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH)
1270 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH)
1271 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH)
1272 | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST)
1273 | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST)
1274 ;
1275
1276 dev->query_device = rxe_query_device;
1277 dev->modify_device = rxe_modify_device;
1278 dev->query_port = rxe_query_port;
1279 dev->modify_port = rxe_modify_port;
1280 dev->get_link_layer = rxe_get_link_layer;
1281 dev->query_gid = rxe_query_gid;
1282 dev->get_netdev = rxe_get_netdev;
1283 dev->add_gid = rxe_add_gid;
1284 dev->del_gid = rxe_del_gid;
1285 dev->query_pkey = rxe_query_pkey;
1286 dev->alloc_ucontext = rxe_alloc_ucontext;
1287 dev->dealloc_ucontext = rxe_dealloc_ucontext;
1288 dev->mmap = rxe_mmap;
1289 dev->get_port_immutable = rxe_port_immutable;
1290 dev->alloc_pd = rxe_alloc_pd;
1291 dev->dealloc_pd = rxe_dealloc_pd;
1292 dev->create_ah = rxe_create_ah;
1293 dev->modify_ah = rxe_modify_ah;
1294 dev->query_ah = rxe_query_ah;
1295 dev->destroy_ah = rxe_destroy_ah;
1296 dev->create_srq = rxe_create_srq;
1297 dev->modify_srq = rxe_modify_srq;
1298 dev->query_srq = rxe_query_srq;
1299 dev->destroy_srq = rxe_destroy_srq;
1300 dev->post_srq_recv = rxe_post_srq_recv;
1301 dev->create_qp = rxe_create_qp;
1302 dev->modify_qp = rxe_modify_qp;
1303 dev->query_qp = rxe_query_qp;
1304 dev->destroy_qp = rxe_destroy_qp;
1305 dev->post_send = rxe_post_send;
1306 dev->post_recv = rxe_post_recv;
1307 dev->create_cq = rxe_create_cq;
1308 dev->destroy_cq = rxe_destroy_cq;
1309 dev->resize_cq = rxe_resize_cq;
1310 dev->poll_cq = rxe_poll_cq;
1311 dev->peek_cq = rxe_peek_cq;
1312 dev->req_notify_cq = rxe_req_notify_cq;
1313 dev->get_dma_mr = rxe_get_dma_mr;
1314 dev->reg_user_mr = rxe_reg_user_mr;
1315 dev->dereg_mr = rxe_dereg_mr;
1316 dev->alloc_mr = rxe_alloc_mr;
1317 dev->map_mr_sg = rxe_map_mr_sg;
1318 dev->attach_mcast = rxe_attach_mcast;
1319 dev->detach_mcast = rxe_detach_mcast;
1320
1321 err = ib_register_device(dev, NULL);
1322 if (err) {
1323 pr_warn("rxe_register_device failed, err = %d\n", err);
1324 goto err1;
1325 }
1326
1327 for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) {
1328 err = device_create_file(&dev->dev, rxe_dev_attributes[i]);
1329 if (err) {
1330 pr_warn("device_create_file failed, i = %d, err = %d\n",
1331 i, err);
1332 goto err2;
1333 }
1334 }
1335
1336 return 0;
1337
1338err2:
1339 ib_unregister_device(dev);
1340err1:
1341 return err;
1342}
1343
1344int rxe_unregister_device(struct rxe_dev *rxe)
1345{
1346 int i;
1347 struct ib_device *dev = &rxe->ib_dev;
1348
1349 for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i)
1350 device_remove_file(&dev->dev, rxe_dev_attributes[i]);
1351
1352 ib_unregister_device(dev);
1353
1354 return 0;
1355}