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1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2/*
3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
5 */
6
7#include <linux/dma-mapping.h>
8#include <net/addrconf.h>
9#include <rdma/uverbs_ioctl.h>
10
11#include "rxe.h"
12#include "rxe_queue.h"
13#include "rxe_hw_counters.h"
14
15static int rxe_query_device(struct ib_device *dev,
16 struct ib_device_attr *attr,
17 struct ib_udata *uhw)
18{
19 struct rxe_dev *rxe = to_rdev(dev);
20
21 if (uhw->inlen || uhw->outlen)
22 return -EINVAL;
23
24 *attr = rxe->attr;
25 return 0;
26}
27
28static int rxe_query_port(struct ib_device *dev,
29 u32 port_num, struct ib_port_attr *attr)
30{
31 struct rxe_dev *rxe = to_rdev(dev);
32 int rc;
33
34 /* *attr being zeroed by the caller, avoid zeroing it here */
35 *attr = rxe->port.attr;
36
37 mutex_lock(&rxe->usdev_lock);
38 rc = ib_get_eth_speed(dev, port_num, &attr->active_speed,
39 &attr->active_width);
40
41 if (attr->state == IB_PORT_ACTIVE)
42 attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
43 else if (dev_get_flags(rxe->ndev) & IFF_UP)
44 attr->phys_state = IB_PORT_PHYS_STATE_POLLING;
45 else
46 attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;
47
48 mutex_unlock(&rxe->usdev_lock);
49
50 return rc;
51}
52
53static int rxe_query_pkey(struct ib_device *device,
54 u32 port_num, u16 index, u16 *pkey)
55{
56 if (index > 0)
57 return -EINVAL;
58
59 *pkey = IB_DEFAULT_PKEY_FULL;
60 return 0;
61}
62
63static int rxe_modify_device(struct ib_device *dev,
64 int mask, struct ib_device_modify *attr)
65{
66 struct rxe_dev *rxe = to_rdev(dev);
67
68 if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
69 IB_DEVICE_MODIFY_NODE_DESC))
70 return -EOPNOTSUPP;
71
72 if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
73 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
74
75 if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
76 memcpy(rxe->ib_dev.node_desc,
77 attr->node_desc, sizeof(rxe->ib_dev.node_desc));
78 }
79
80 return 0;
81}
82
83static int rxe_modify_port(struct ib_device *dev,
84 u32 port_num, int mask, struct ib_port_modify *attr)
85{
86 struct rxe_dev *rxe = to_rdev(dev);
87 struct rxe_port *port;
88
89 port = &rxe->port;
90
91 port->attr.port_cap_flags |= attr->set_port_cap_mask;
92 port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
93
94 if (mask & IB_PORT_RESET_QKEY_CNTR)
95 port->attr.qkey_viol_cntr = 0;
96
97 return 0;
98}
99
100static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
101 u32 port_num)
102{
103 return IB_LINK_LAYER_ETHERNET;
104}
105
106static int rxe_alloc_ucontext(struct ib_ucontext *ibuc, struct ib_udata *udata)
107{
108 struct rxe_dev *rxe = to_rdev(ibuc->device);
109 struct rxe_ucontext *uc = to_ruc(ibuc);
110
111 return rxe_add_to_pool(&rxe->uc_pool, uc);
112}
113
114static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
115{
116 struct rxe_ucontext *uc = to_ruc(ibuc);
117
118 rxe_cleanup(uc);
119}
120
121static int rxe_port_immutable(struct ib_device *dev, u32 port_num,
122 struct ib_port_immutable *immutable)
123{
124 int err;
125 struct ib_port_attr attr;
126
127 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
128
129 err = ib_query_port(dev, port_num, &attr);
130 if (err)
131 return err;
132
133 immutable->pkey_tbl_len = attr.pkey_tbl_len;
134 immutable->gid_tbl_len = attr.gid_tbl_len;
135 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
136
137 return 0;
138}
139
140static int rxe_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
141{
142 struct rxe_dev *rxe = to_rdev(ibpd->device);
143 struct rxe_pd *pd = to_rpd(ibpd);
144
145 return rxe_add_to_pool(&rxe->pd_pool, pd);
146}
147
148static int rxe_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
149{
150 struct rxe_pd *pd = to_rpd(ibpd);
151
152 rxe_cleanup(pd);
153 return 0;
154}
155
156static int rxe_create_ah(struct ib_ah *ibah,
157 struct rdma_ah_init_attr *init_attr,
158 struct ib_udata *udata)
159
160{
161 struct rxe_dev *rxe = to_rdev(ibah->device);
162 struct rxe_ah *ah = to_rah(ibah);
163 struct rxe_create_ah_resp __user *uresp = NULL;
164 int err;
165
166 if (udata) {
167 /* test if new user provider */
168 if (udata->outlen >= sizeof(*uresp))
169 uresp = udata->outbuf;
170 ah->is_user = true;
171 } else {
172 ah->is_user = false;
173 }
174
175 err = rxe_add_to_pool_ah(&rxe->ah_pool, ah,
176 init_attr->flags & RDMA_CREATE_AH_SLEEPABLE);
177 if (err)
178 return err;
179
180 /* create index > 0 */
181 ah->ah_num = ah->elem.index;
182
183 err = rxe_ah_chk_attr(ah, init_attr->ah_attr);
184 if (err) {
185 rxe_cleanup(ah);
186 return err;
187 }
188
189 if (uresp) {
190 /* only if new user provider */
191 err = copy_to_user(&uresp->ah_num, &ah->ah_num,
192 sizeof(uresp->ah_num));
193 if (err) {
194 rxe_cleanup(ah);
195 return -EFAULT;
196 }
197 } else if (ah->is_user) {
198 /* only if old user provider */
199 ah->ah_num = 0;
200 }
201
202 rxe_init_av(init_attr->ah_attr, &ah->av);
203 rxe_finalize(ah);
204
205 return 0;
206}
207
208static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
209{
210 int err;
211 struct rxe_ah *ah = to_rah(ibah);
212
213 err = rxe_ah_chk_attr(ah, attr);
214 if (err)
215 return err;
216
217 rxe_init_av(attr, &ah->av);
218 return 0;
219}
220
221static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
222{
223 struct rxe_ah *ah = to_rah(ibah);
224
225 memset(attr, 0, sizeof(*attr));
226 attr->type = ibah->type;
227 rxe_av_to_attr(&ah->av, attr);
228 return 0;
229}
230
231static int rxe_destroy_ah(struct ib_ah *ibah, u32 flags)
232{
233 struct rxe_ah *ah = to_rah(ibah);
234
235 rxe_cleanup_ah(ah, flags & RDMA_DESTROY_AH_SLEEPABLE);
236
237 return 0;
238}
239
240static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr)
241{
242 int i;
243 u32 length;
244 struct rxe_recv_wqe *recv_wqe;
245 int num_sge = ibwr->num_sge;
246 int full;
247
248 full = queue_full(rq->queue, QUEUE_TYPE_TO_DRIVER);
249 if (unlikely(full))
250 return -ENOMEM;
251
252 if (unlikely(num_sge > rq->max_sge))
253 return -EINVAL;
254
255 length = 0;
256 for (i = 0; i < num_sge; i++)
257 length += ibwr->sg_list[i].length;
258
259 recv_wqe = queue_producer_addr(rq->queue, QUEUE_TYPE_TO_DRIVER);
260 recv_wqe->wr_id = ibwr->wr_id;
261
262 memcpy(recv_wqe->dma.sge, ibwr->sg_list,
263 num_sge * sizeof(struct ib_sge));
264
265 recv_wqe->dma.length = length;
266 recv_wqe->dma.resid = length;
267 recv_wqe->dma.num_sge = num_sge;
268 recv_wqe->dma.cur_sge = 0;
269 recv_wqe->dma.sge_offset = 0;
270
271 queue_advance_producer(rq->queue, QUEUE_TYPE_TO_DRIVER);
272
273 return 0;
274}
275
276static int rxe_create_srq(struct ib_srq *ibsrq, struct ib_srq_init_attr *init,
277 struct ib_udata *udata)
278{
279 int err;
280 struct rxe_dev *rxe = to_rdev(ibsrq->device);
281 struct rxe_pd *pd = to_rpd(ibsrq->pd);
282 struct rxe_srq *srq = to_rsrq(ibsrq);
283 struct rxe_create_srq_resp __user *uresp = NULL;
284
285 if (udata) {
286 if (udata->outlen < sizeof(*uresp))
287 return -EINVAL;
288 uresp = udata->outbuf;
289 }
290
291 if (init->srq_type != IB_SRQT_BASIC)
292 return -EOPNOTSUPP;
293
294 err = rxe_srq_chk_init(rxe, init);
295 if (err)
296 return err;
297
298 err = rxe_add_to_pool(&rxe->srq_pool, srq);
299 if (err)
300 return err;
301
302 rxe_get(pd);
303 srq->pd = pd;
304
305 err = rxe_srq_from_init(rxe, srq, init, udata, uresp);
306 if (err)
307 goto err_cleanup;
308
309 return 0;
310
311err_cleanup:
312 rxe_cleanup(srq);
313
314 return err;
315}
316
317static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
318 enum ib_srq_attr_mask mask,
319 struct ib_udata *udata)
320{
321 int err;
322 struct rxe_srq *srq = to_rsrq(ibsrq);
323 struct rxe_dev *rxe = to_rdev(ibsrq->device);
324 struct rxe_modify_srq_cmd ucmd = {};
325
326 if (udata) {
327 if (udata->inlen < sizeof(ucmd))
328 return -EINVAL;
329
330 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
331 if (err)
332 return err;
333 }
334
335 err = rxe_srq_chk_attr(rxe, srq, attr, mask);
336 if (err)
337 return err;
338
339 return rxe_srq_from_attr(rxe, srq, attr, mask, &ucmd, udata);
340}
341
342static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
343{
344 struct rxe_srq *srq = to_rsrq(ibsrq);
345
346 if (srq->error)
347 return -EINVAL;
348
349 attr->max_wr = srq->rq.queue->buf->index_mask;
350 attr->max_sge = srq->rq.max_sge;
351 attr->srq_limit = srq->limit;
352 return 0;
353}
354
355static int rxe_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata)
356{
357 struct rxe_srq *srq = to_rsrq(ibsrq);
358
359 rxe_cleanup(srq);
360 return 0;
361}
362
363static int rxe_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
364 const struct ib_recv_wr **bad_wr)
365{
366 int err = 0;
367 struct rxe_srq *srq = to_rsrq(ibsrq);
368 unsigned long flags;
369
370 spin_lock_irqsave(&srq->rq.producer_lock, flags);
371
372 while (wr) {
373 err = post_one_recv(&srq->rq, wr);
374 if (unlikely(err))
375 break;
376 wr = wr->next;
377 }
378
379 spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
380
381 if (err)
382 *bad_wr = wr;
383
384 return err;
385}
386
387static int rxe_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init,
388 struct ib_udata *udata)
389{
390 int err;
391 struct rxe_dev *rxe = to_rdev(ibqp->device);
392 struct rxe_pd *pd = to_rpd(ibqp->pd);
393 struct rxe_qp *qp = to_rqp(ibqp);
394 struct rxe_create_qp_resp __user *uresp = NULL;
395
396 if (udata) {
397 if (udata->outlen < sizeof(*uresp))
398 return -EINVAL;
399 uresp = udata->outbuf;
400 }
401
402 if (init->create_flags)
403 return -EOPNOTSUPP;
404
405 err = rxe_qp_chk_init(rxe, init);
406 if (err)
407 return err;
408
409 if (udata) {
410 if (udata->inlen)
411 return -EINVAL;
412
413 qp->is_user = true;
414 } else {
415 qp->is_user = false;
416 }
417
418 err = rxe_add_to_pool(&rxe->qp_pool, qp);
419 if (err)
420 return err;
421
422 err = rxe_qp_from_init(rxe, qp, pd, init, uresp, ibqp->pd, udata);
423 if (err)
424 goto qp_init;
425
426 rxe_finalize(qp);
427 return 0;
428
429qp_init:
430 rxe_cleanup(qp);
431 return err;
432}
433
434static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
435 int mask, struct ib_udata *udata)
436{
437 int err;
438 struct rxe_dev *rxe = to_rdev(ibqp->device);
439 struct rxe_qp *qp = to_rqp(ibqp);
440
441 if (mask & ~IB_QP_ATTR_STANDARD_BITS)
442 return -EOPNOTSUPP;
443
444 err = rxe_qp_chk_attr(rxe, qp, attr, mask);
445 if (err)
446 return err;
447
448 err = rxe_qp_from_attr(qp, attr, mask, udata);
449 if (err)
450 return err;
451
452 if ((mask & IB_QP_AV) && (attr->ah_attr.ah_flags & IB_AH_GRH))
453 qp->src_port = rdma_get_udp_sport(attr->ah_attr.grh.flow_label,
454 qp->ibqp.qp_num,
455 qp->attr.dest_qp_num);
456
457 return 0;
458}
459
460static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
461 int mask, struct ib_qp_init_attr *init)
462{
463 struct rxe_qp *qp = to_rqp(ibqp);
464
465 rxe_qp_to_init(qp, init);
466 rxe_qp_to_attr(qp, attr, mask);
467
468 return 0;
469}
470
471static int rxe_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
472{
473 struct rxe_qp *qp = to_rqp(ibqp);
474 int ret;
475
476 ret = rxe_qp_chk_destroy(qp);
477 if (ret)
478 return ret;
479
480 rxe_cleanup(qp);
481 return 0;
482}
483
484static int validate_send_wr(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
485 unsigned int mask, unsigned int length)
486{
487 int num_sge = ibwr->num_sge;
488 struct rxe_sq *sq = &qp->sq;
489
490 if (unlikely(num_sge > sq->max_sge))
491 return -EINVAL;
492
493 if (unlikely(mask & WR_ATOMIC_MASK)) {
494 if (length < 8)
495 return -EINVAL;
496
497 if (atomic_wr(ibwr)->remote_addr & 0x7)
498 return -EINVAL;
499 }
500
501 if (unlikely((ibwr->send_flags & IB_SEND_INLINE) &&
502 (length > sq->max_inline)))
503 return -EINVAL;
504
505 return 0;
506}
507
508static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
509 const struct ib_send_wr *ibwr)
510{
511 wr->wr_id = ibwr->wr_id;
512 wr->opcode = ibwr->opcode;
513 wr->send_flags = ibwr->send_flags;
514
515 if (qp_type(qp) == IB_QPT_UD ||
516 qp_type(qp) == IB_QPT_GSI) {
517 struct ib_ah *ibah = ud_wr(ibwr)->ah;
518
519 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn;
520 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey;
521 wr->wr.ud.ah_num = to_rah(ibah)->ah_num;
522 if (qp_type(qp) == IB_QPT_GSI)
523 wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index;
524 if (wr->opcode == IB_WR_SEND_WITH_IMM)
525 wr->ex.imm_data = ibwr->ex.imm_data;
526 } else {
527 switch (wr->opcode) {
528 case IB_WR_RDMA_WRITE_WITH_IMM:
529 wr->ex.imm_data = ibwr->ex.imm_data;
530 fallthrough;
531 case IB_WR_RDMA_READ:
532 case IB_WR_RDMA_WRITE:
533 wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
534 wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey;
535 break;
536 case IB_WR_SEND_WITH_IMM:
537 wr->ex.imm_data = ibwr->ex.imm_data;
538 break;
539 case IB_WR_SEND_WITH_INV:
540 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
541 break;
542 case IB_WR_ATOMIC_CMP_AND_SWP:
543 case IB_WR_ATOMIC_FETCH_AND_ADD:
544 wr->wr.atomic.remote_addr =
545 atomic_wr(ibwr)->remote_addr;
546 wr->wr.atomic.compare_add =
547 atomic_wr(ibwr)->compare_add;
548 wr->wr.atomic.swap = atomic_wr(ibwr)->swap;
549 wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey;
550 break;
551 case IB_WR_LOCAL_INV:
552 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
553 break;
554 case IB_WR_REG_MR:
555 wr->wr.reg.mr = reg_wr(ibwr)->mr;
556 wr->wr.reg.key = reg_wr(ibwr)->key;
557 wr->wr.reg.access = reg_wr(ibwr)->access;
558 break;
559 default:
560 break;
561 }
562 }
563}
564
565static void copy_inline_data_to_wqe(struct rxe_send_wqe *wqe,
566 const struct ib_send_wr *ibwr)
567{
568 struct ib_sge *sge = ibwr->sg_list;
569 u8 *p = wqe->dma.inline_data;
570 int i;
571
572 for (i = 0; i < ibwr->num_sge; i++, sge++) {
573 memcpy(p, (void *)(uintptr_t)sge->addr, sge->length);
574 p += sge->length;
575 }
576}
577
578static void init_send_wqe(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
579 unsigned int mask, unsigned int length,
580 struct rxe_send_wqe *wqe)
581{
582 int num_sge = ibwr->num_sge;
583
584 init_send_wr(qp, &wqe->wr, ibwr);
585
586 /* local operation */
587 if (unlikely(mask & WR_LOCAL_OP_MASK)) {
588 wqe->mask = mask;
589 wqe->state = wqe_state_posted;
590 return;
591 }
592
593 if (unlikely(ibwr->send_flags & IB_SEND_INLINE))
594 copy_inline_data_to_wqe(wqe, ibwr);
595 else
596 memcpy(wqe->dma.sge, ibwr->sg_list,
597 num_sge * sizeof(struct ib_sge));
598
599 wqe->iova = mask & WR_ATOMIC_MASK ? atomic_wr(ibwr)->remote_addr :
600 mask & WR_READ_OR_WRITE_MASK ? rdma_wr(ibwr)->remote_addr : 0;
601 wqe->mask = mask;
602 wqe->dma.length = length;
603 wqe->dma.resid = length;
604 wqe->dma.num_sge = num_sge;
605 wqe->dma.cur_sge = 0;
606 wqe->dma.sge_offset = 0;
607 wqe->state = wqe_state_posted;
608 wqe->ssn = atomic_add_return(1, &qp->ssn);
609}
610
611static int post_one_send(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
612 unsigned int mask, u32 length)
613{
614 int err;
615 struct rxe_sq *sq = &qp->sq;
616 struct rxe_send_wqe *send_wqe;
617 unsigned long flags;
618 int full;
619
620 err = validate_send_wr(qp, ibwr, mask, length);
621 if (err)
622 return err;
623
624 spin_lock_irqsave(&qp->sq.sq_lock, flags);
625
626 full = queue_full(sq->queue, QUEUE_TYPE_TO_DRIVER);
627
628 if (unlikely(full)) {
629 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
630 return -ENOMEM;
631 }
632
633 send_wqe = queue_producer_addr(sq->queue, QUEUE_TYPE_TO_DRIVER);
634 init_send_wqe(qp, ibwr, mask, length, send_wqe);
635
636 queue_advance_producer(sq->queue, QUEUE_TYPE_TO_DRIVER);
637
638 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
639
640 return 0;
641}
642
643static int rxe_post_send_kernel(struct rxe_qp *qp, const struct ib_send_wr *wr,
644 const struct ib_send_wr **bad_wr)
645{
646 int err = 0;
647 unsigned int mask;
648 unsigned int length = 0;
649 int i;
650 struct ib_send_wr *next;
651
652 while (wr) {
653 mask = wr_opcode_mask(wr->opcode, qp);
654 if (unlikely(!mask)) {
655 err = -EINVAL;
656 *bad_wr = wr;
657 break;
658 }
659
660 if (unlikely((wr->send_flags & IB_SEND_INLINE) &&
661 !(mask & WR_INLINE_MASK))) {
662 err = -EINVAL;
663 *bad_wr = wr;
664 break;
665 }
666
667 next = wr->next;
668
669 length = 0;
670 for (i = 0; i < wr->num_sge; i++)
671 length += wr->sg_list[i].length;
672
673 err = post_one_send(qp, wr, mask, length);
674
675 if (err) {
676 *bad_wr = wr;
677 break;
678 }
679 wr = next;
680 }
681
682 rxe_sched_task(&qp->req.task);
683 if (unlikely(qp->req.state == QP_STATE_ERROR))
684 rxe_sched_task(&qp->comp.task);
685
686 return err;
687}
688
689static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
690 const struct ib_send_wr **bad_wr)
691{
692 struct rxe_qp *qp = to_rqp(ibqp);
693
694 if (unlikely(!qp->valid)) {
695 *bad_wr = wr;
696 return -EINVAL;
697 }
698
699 if (unlikely(qp->req.state < QP_STATE_READY)) {
700 *bad_wr = wr;
701 return -EINVAL;
702 }
703
704 if (qp->is_user) {
705 /* Utilize process context to do protocol processing */
706 rxe_run_task(&qp->req.task);
707 return 0;
708 } else
709 return rxe_post_send_kernel(qp, wr, bad_wr);
710}
711
712static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
713 const struct ib_recv_wr **bad_wr)
714{
715 int err = 0;
716 struct rxe_qp *qp = to_rqp(ibqp);
717 struct rxe_rq *rq = &qp->rq;
718 unsigned long flags;
719
720 if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) {
721 *bad_wr = wr;
722 return -EINVAL;
723 }
724
725 if (unlikely(qp->srq)) {
726 *bad_wr = wr;
727 return -EINVAL;
728 }
729
730 spin_lock_irqsave(&rq->producer_lock, flags);
731
732 while (wr) {
733 err = post_one_recv(rq, wr);
734 if (unlikely(err)) {
735 *bad_wr = wr;
736 break;
737 }
738 wr = wr->next;
739 }
740
741 spin_unlock_irqrestore(&rq->producer_lock, flags);
742
743 if (qp->resp.state == QP_STATE_ERROR)
744 rxe_sched_task(&qp->resp.task);
745
746 return err;
747}
748
749static int rxe_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
750 struct ib_udata *udata)
751{
752 int err;
753 struct ib_device *dev = ibcq->device;
754 struct rxe_dev *rxe = to_rdev(dev);
755 struct rxe_cq *cq = to_rcq(ibcq);
756 struct rxe_create_cq_resp __user *uresp = NULL;
757
758 if (udata) {
759 if (udata->outlen < sizeof(*uresp))
760 return -EINVAL;
761 uresp = udata->outbuf;
762 }
763
764 if (attr->flags)
765 return -EOPNOTSUPP;
766
767 err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector);
768 if (err)
769 return err;
770
771 err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector, udata,
772 uresp);
773 if (err)
774 return err;
775
776 return rxe_add_to_pool(&rxe->cq_pool, cq);
777}
778
779static int rxe_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
780{
781 struct rxe_cq *cq = to_rcq(ibcq);
782
783 /* See IBA C11-17: The CI shall return an error if this Verb is
784 * invoked while a Work Queue is still associated with the CQ.
785 */
786 if (atomic_read(&cq->num_wq))
787 return -EINVAL;
788
789 rxe_cq_disable(cq);
790
791 rxe_cleanup(cq);
792 return 0;
793}
794
795static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
796{
797 int err;
798 struct rxe_cq *cq = to_rcq(ibcq);
799 struct rxe_dev *rxe = to_rdev(ibcq->device);
800 struct rxe_resize_cq_resp __user *uresp = NULL;
801
802 if (udata) {
803 if (udata->outlen < sizeof(*uresp))
804 return -EINVAL;
805 uresp = udata->outbuf;
806 }
807
808 err = rxe_cq_chk_attr(rxe, cq, cqe, 0);
809 if (err)
810 return err;
811
812 return rxe_cq_resize_queue(cq, cqe, uresp, udata);
813}
814
815static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
816{
817 int i;
818 struct rxe_cq *cq = to_rcq(ibcq);
819 struct rxe_cqe *cqe;
820 unsigned long flags;
821
822 spin_lock_irqsave(&cq->cq_lock, flags);
823 for (i = 0; i < num_entries; i++) {
824 cqe = queue_head(cq->queue, QUEUE_TYPE_FROM_DRIVER);
825 if (!cqe)
826 break;
827
828 memcpy(wc++, &cqe->ibwc, sizeof(*wc));
829 queue_advance_consumer(cq->queue, QUEUE_TYPE_FROM_DRIVER);
830 }
831 spin_unlock_irqrestore(&cq->cq_lock, flags);
832
833 return i;
834}
835
836static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
837{
838 struct rxe_cq *cq = to_rcq(ibcq);
839 int count;
840
841 count = queue_count(cq->queue, QUEUE_TYPE_FROM_DRIVER);
842
843 return (count > wc_cnt) ? wc_cnt : count;
844}
845
846static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
847{
848 struct rxe_cq *cq = to_rcq(ibcq);
849 int ret = 0;
850 int empty;
851 unsigned long irq_flags;
852
853 spin_lock_irqsave(&cq->cq_lock, irq_flags);
854 if (cq->notify != IB_CQ_NEXT_COMP)
855 cq->notify = flags & IB_CQ_SOLICITED_MASK;
856
857 empty = queue_empty(cq->queue, QUEUE_TYPE_FROM_DRIVER);
858
859 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !empty)
860 ret = 1;
861
862 spin_unlock_irqrestore(&cq->cq_lock, irq_flags);
863
864 return ret;
865}
866
867static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
868{
869 struct rxe_dev *rxe = to_rdev(ibpd->device);
870 struct rxe_pd *pd = to_rpd(ibpd);
871 struct rxe_mr *mr;
872
873 mr = rxe_alloc(&rxe->mr_pool);
874 if (!mr)
875 return ERR_PTR(-ENOMEM);
876
877 rxe_get(pd);
878 mr->ibmr.pd = ibpd;
879 mr->ibmr.device = ibpd->device;
880
881 rxe_mr_init_dma(access, mr);
882 rxe_finalize(mr);
883
884 return &mr->ibmr;
885}
886
887static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
888 u64 start,
889 u64 length,
890 u64 iova,
891 int access, struct ib_udata *udata)
892{
893 int err;
894 struct rxe_dev *rxe = to_rdev(ibpd->device);
895 struct rxe_pd *pd = to_rpd(ibpd);
896 struct rxe_mr *mr;
897
898 mr = rxe_alloc(&rxe->mr_pool);
899 if (!mr)
900 return ERR_PTR(-ENOMEM);
901
902 rxe_get(pd);
903 mr->ibmr.pd = ibpd;
904 mr->ibmr.device = ibpd->device;
905
906 err = rxe_mr_init_user(rxe, start, length, iova, access, mr);
907 if (err)
908 goto err1;
909
910 rxe_finalize(mr);
911
912 return &mr->ibmr;
913
914err1:
915 rxe_cleanup(mr);
916 return ERR_PTR(err);
917}
918
919static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
920 u32 max_num_sg)
921{
922 struct rxe_dev *rxe = to_rdev(ibpd->device);
923 struct rxe_pd *pd = to_rpd(ibpd);
924 struct rxe_mr *mr;
925 int err;
926
927 if (mr_type != IB_MR_TYPE_MEM_REG)
928 return ERR_PTR(-EINVAL);
929
930 mr = rxe_alloc(&rxe->mr_pool);
931 if (!mr)
932 return ERR_PTR(-ENOMEM);
933
934 rxe_get(pd);
935 mr->ibmr.pd = ibpd;
936 mr->ibmr.device = ibpd->device;
937
938 err = rxe_mr_init_fast(max_num_sg, mr);
939 if (err)
940 goto err1;
941
942 rxe_finalize(mr);
943
944 return &mr->ibmr;
945
946err1:
947 rxe_cleanup(mr);
948 return ERR_PTR(err);
949}
950
951static int rxe_set_page(struct ib_mr *ibmr, u64 addr)
952{
953 struct rxe_mr *mr = to_rmr(ibmr);
954 struct rxe_map *map;
955 struct rxe_phys_buf *buf;
956
957 if (unlikely(mr->nbuf == mr->num_buf))
958 return -ENOMEM;
959
960 map = mr->map[mr->nbuf / RXE_BUF_PER_MAP];
961 buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP];
962
963 buf->addr = addr;
964 buf->size = ibmr->page_size;
965 mr->nbuf++;
966
967 return 0;
968}
969
970static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
971 int sg_nents, unsigned int *sg_offset)
972{
973 struct rxe_mr *mr = to_rmr(ibmr);
974 int n;
975
976 mr->nbuf = 0;
977
978 n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page);
979
980 mr->page_shift = ilog2(ibmr->page_size);
981 mr->page_mask = ibmr->page_size - 1;
982 mr->offset = ibmr->iova & mr->page_mask;
983
984 return n;
985}
986
987static ssize_t parent_show(struct device *device,
988 struct device_attribute *attr, char *buf)
989{
990 struct rxe_dev *rxe =
991 rdma_device_to_drv_device(device, struct rxe_dev, ib_dev);
992
993 return sysfs_emit(buf, "%s\n", rxe_parent_name(rxe, 1));
994}
995
996static DEVICE_ATTR_RO(parent);
997
998static struct attribute *rxe_dev_attributes[] = {
999 &dev_attr_parent.attr,
1000 NULL
1001};
1002
1003static const struct attribute_group rxe_attr_group = {
1004 .attrs = rxe_dev_attributes,
1005};
1006
1007static int rxe_enable_driver(struct ib_device *ib_dev)
1008{
1009 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
1010
1011 rxe_set_port_state(rxe);
1012 dev_info(&rxe->ib_dev.dev, "added %s\n", netdev_name(rxe->ndev));
1013 return 0;
1014}
1015
1016static const struct ib_device_ops rxe_dev_ops = {
1017 .owner = THIS_MODULE,
1018 .driver_id = RDMA_DRIVER_RXE,
1019 .uverbs_abi_ver = RXE_UVERBS_ABI_VERSION,
1020
1021 .alloc_hw_port_stats = rxe_ib_alloc_hw_port_stats,
1022 .alloc_mr = rxe_alloc_mr,
1023 .alloc_mw = rxe_alloc_mw,
1024 .alloc_pd = rxe_alloc_pd,
1025 .alloc_ucontext = rxe_alloc_ucontext,
1026 .attach_mcast = rxe_attach_mcast,
1027 .create_ah = rxe_create_ah,
1028 .create_cq = rxe_create_cq,
1029 .create_qp = rxe_create_qp,
1030 .create_srq = rxe_create_srq,
1031 .create_user_ah = rxe_create_ah,
1032 .dealloc_driver = rxe_dealloc,
1033 .dealloc_mw = rxe_dealloc_mw,
1034 .dealloc_pd = rxe_dealloc_pd,
1035 .dealloc_ucontext = rxe_dealloc_ucontext,
1036 .dereg_mr = rxe_dereg_mr,
1037 .destroy_ah = rxe_destroy_ah,
1038 .destroy_cq = rxe_destroy_cq,
1039 .destroy_qp = rxe_destroy_qp,
1040 .destroy_srq = rxe_destroy_srq,
1041 .detach_mcast = rxe_detach_mcast,
1042 .device_group = &rxe_attr_group,
1043 .enable_driver = rxe_enable_driver,
1044 .get_dma_mr = rxe_get_dma_mr,
1045 .get_hw_stats = rxe_ib_get_hw_stats,
1046 .get_link_layer = rxe_get_link_layer,
1047 .get_port_immutable = rxe_port_immutable,
1048 .map_mr_sg = rxe_map_mr_sg,
1049 .mmap = rxe_mmap,
1050 .modify_ah = rxe_modify_ah,
1051 .modify_device = rxe_modify_device,
1052 .modify_port = rxe_modify_port,
1053 .modify_qp = rxe_modify_qp,
1054 .modify_srq = rxe_modify_srq,
1055 .peek_cq = rxe_peek_cq,
1056 .poll_cq = rxe_poll_cq,
1057 .post_recv = rxe_post_recv,
1058 .post_send = rxe_post_send,
1059 .post_srq_recv = rxe_post_srq_recv,
1060 .query_ah = rxe_query_ah,
1061 .query_device = rxe_query_device,
1062 .query_pkey = rxe_query_pkey,
1063 .query_port = rxe_query_port,
1064 .query_qp = rxe_query_qp,
1065 .query_srq = rxe_query_srq,
1066 .reg_user_mr = rxe_reg_user_mr,
1067 .req_notify_cq = rxe_req_notify_cq,
1068 .resize_cq = rxe_resize_cq,
1069
1070 INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah),
1071 INIT_RDMA_OBJ_SIZE(ib_cq, rxe_cq, ibcq),
1072 INIT_RDMA_OBJ_SIZE(ib_pd, rxe_pd, ibpd),
1073 INIT_RDMA_OBJ_SIZE(ib_qp, rxe_qp, ibqp),
1074 INIT_RDMA_OBJ_SIZE(ib_srq, rxe_srq, ibsrq),
1075 INIT_RDMA_OBJ_SIZE(ib_ucontext, rxe_ucontext, ibuc),
1076 INIT_RDMA_OBJ_SIZE(ib_mw, rxe_mw, ibmw),
1077};
1078
1079int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name)
1080{
1081 int err;
1082 struct ib_device *dev = &rxe->ib_dev;
1083
1084 strscpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
1085
1086 dev->node_type = RDMA_NODE_IB_CA;
1087 dev->phys_port_cnt = 1;
1088 dev->num_comp_vectors = num_possible_cpus();
1089 dev->local_dma_lkey = 0;
1090 addrconf_addr_eui48((unsigned char *)&dev->node_guid,
1091 rxe->ndev->dev_addr);
1092
1093 dev->uverbs_cmd_mask |= BIT_ULL(IB_USER_VERBS_CMD_POST_SEND) |
1094 BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ);
1095
1096 ib_set_device_ops(dev, &rxe_dev_ops);
1097 err = ib_device_set_netdev(&rxe->ib_dev, rxe->ndev, 1);
1098 if (err)
1099 return err;
1100
1101 err = rxe_icrc_init(rxe);
1102 if (err)
1103 return err;
1104
1105 err = ib_register_device(dev, ibdev_name, NULL);
1106 if (err)
1107 rxe_dbg(rxe, "failed with error %d\n", err);
1108
1109 /*
1110 * Note that rxe may be invalid at this point if another thread
1111 * unregistered it.
1112 */
1113 return err;
1114}