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