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
rxe_query_device(struct ib_device * dev,struct ib_device_attr * attr,struct ib_udata * uhw)15 static 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
rxe_query_port(struct ib_device * dev,u32 port_num,struct ib_port_attr * attr)28 static 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
rxe_query_pkey(struct ib_device * device,u32 port_num,u16 index,u16 * pkey)53 static 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
rxe_modify_device(struct ib_device * dev,int mask,struct ib_device_modify * attr)63 static 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
rxe_modify_port(struct ib_device * dev,u32 port_num,int mask,struct ib_port_modify * attr)83 static 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
rxe_get_link_layer(struct ib_device * dev,u32 port_num)100 static 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
rxe_alloc_ucontext(struct ib_ucontext * ibuc,struct ib_udata * udata)106 static 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
rxe_dealloc_ucontext(struct ib_ucontext * ibuc)114 static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
115 {
116 struct rxe_ucontext *uc = to_ruc(ibuc);
117
118 rxe_cleanup(uc);
119 }
120
rxe_port_immutable(struct ib_device * dev,u32 port_num,struct ib_port_immutable * immutable)121 static 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
rxe_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)140 static 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
rxe_dealloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)148 static 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
rxe_create_ah(struct ib_ah * ibah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)156 static 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
rxe_modify_ah(struct ib_ah * ibah,struct rdma_ah_attr * attr)208 static 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
rxe_query_ah(struct ib_ah * ibah,struct rdma_ah_attr * attr)221 static 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
rxe_destroy_ah(struct ib_ah * ibah,u32 flags)231 static 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
post_one_recv(struct rxe_rq * rq,const struct ib_recv_wr * ibwr)240 static 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_FROM_ULP);
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_FROM_ULP);
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_FROM_ULP);
272
273 return 0;
274 }
275
rxe_create_srq(struct ib_srq * ibsrq,struct ib_srq_init_attr * init,struct ib_udata * udata)276 static 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
311 err_cleanup:
312 rxe_cleanup(srq);
313
314 return err;
315 }
316
rxe_modify_srq(struct ib_srq * ibsrq,struct ib_srq_attr * attr,enum ib_srq_attr_mask mask,struct ib_udata * udata)317 static 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
rxe_query_srq(struct ib_srq * ibsrq,struct ib_srq_attr * attr)342 static 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
rxe_destroy_srq(struct ib_srq * ibsrq,struct ib_udata * udata)355 static 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
rxe_post_srq_recv(struct ib_srq * ibsrq,const struct ib_recv_wr * wr,const struct ib_recv_wr ** bad_wr)363 static 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
rxe_create_qp(struct ib_qp * ibqp,struct ib_qp_init_attr * init,struct ib_udata * udata)387 static 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
429 qp_init:
430 rxe_cleanup(qp);
431 return err;
432 }
433
rxe_modify_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int mask,struct ib_udata * udata)434 static 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
rxe_query_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int mask,struct ib_qp_init_attr * init)460 static 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
rxe_destroy_qp(struct ib_qp * ibqp,struct ib_udata * udata)471 static 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
validate_send_wr(struct rxe_qp * qp,const struct ib_send_wr * ibwr,unsigned int mask,unsigned int length)484 static 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
init_send_wr(struct rxe_qp * qp,struct rxe_send_wr * wr,const struct ib_send_wr * ibwr)508 static 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
copy_inline_data_to_wqe(struct rxe_send_wqe * wqe,const struct ib_send_wr * ibwr)565 static 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
init_send_wqe(struct rxe_qp * qp,const struct ib_send_wr * ibwr,unsigned int mask,unsigned int length,struct rxe_send_wqe * wqe)578 static 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
post_one_send(struct rxe_qp * qp,const struct ib_send_wr * ibwr,unsigned int mask,u32 length)611 static 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_FROM_ULP);
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_FROM_ULP);
634 init_send_wqe(qp, ibwr, mask, length, send_wqe);
635
636 queue_advance_producer(sq->queue, QUEUE_TYPE_FROM_ULP);
637
638 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
639
640 return 0;
641 }
642
rxe_post_send_kernel(struct rxe_qp * qp,const struct ib_send_wr * wr,const struct ib_send_wr ** bad_wr)643 static 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
rxe_post_send(struct ib_qp * ibqp,const struct ib_send_wr * wr,const struct ib_send_wr ** bad_wr)689 static 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
rxe_post_recv(struct ib_qp * ibqp,const struct ib_recv_wr * wr,const struct ib_recv_wr ** bad_wr)712 static 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
rxe_create_cq(struct ib_cq * ibcq,const struct ib_cq_init_attr * attr,struct ib_udata * udata)749 static 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
rxe_destroy_cq(struct ib_cq * ibcq,struct ib_udata * udata)779 static 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
rxe_resize_cq(struct ib_cq * ibcq,int cqe,struct ib_udata * udata)795 static 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
rxe_poll_cq(struct ib_cq * ibcq,int num_entries,struct ib_wc * wc)815 static 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_TO_ULP);
825 if (!cqe)
826 break;
827
828 memcpy(wc++, &cqe->ibwc, sizeof(*wc));
829 queue_advance_consumer(cq->queue, QUEUE_TYPE_TO_ULP);
830 }
831 spin_unlock_irqrestore(&cq->cq_lock, flags);
832
833 return i;
834 }
835
rxe_peek_cq(struct ib_cq * ibcq,int wc_cnt)836 static 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_TO_ULP);
842
843 return (count > wc_cnt) ? wc_cnt : count;
844 }
845
rxe_req_notify_cq(struct ib_cq * ibcq,enum ib_cq_notify_flags flags)846 static 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_TO_ULP);
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
rxe_get_dma_mr(struct ib_pd * ibpd,int access)867 static 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 int err;
873
874 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
875 if (!mr) {
876 err = -ENOMEM;
877 goto err_out;
878 }
879
880 err = rxe_add_to_pool(&rxe->mr_pool, mr);
881 if (err)
882 goto err_free;
883
884 rxe_get(pd);
885 mr->ibmr.pd = ibpd;
886 mr->ibmr.device = ibpd->device;
887
888 rxe_mr_init_dma(access, mr);
889 rxe_finalize(mr);
890 return &mr->ibmr;
891
892 err_free:
893 kfree(mr);
894 err_out:
895 return ERR_PTR(err);
896 }
897
rxe_reg_user_mr(struct ib_pd * ibpd,u64 start,u64 length,u64 iova,int access,struct ib_udata * udata)898 static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
899 u64 start,
900 u64 length,
901 u64 iova,
902 int access, struct ib_udata *udata)
903 {
904 int err;
905 struct rxe_dev *rxe = to_rdev(ibpd->device);
906 struct rxe_pd *pd = to_rpd(ibpd);
907 struct rxe_mr *mr;
908
909 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
910 if (!mr) {
911 err = -ENOMEM;
912 goto err_out;
913 }
914
915 err = rxe_add_to_pool(&rxe->mr_pool, mr);
916 if (err)
917 goto err_free;
918
919 rxe_get(pd);
920 mr->ibmr.pd = ibpd;
921 mr->ibmr.device = ibpd->device;
922
923 err = rxe_mr_init_user(rxe, start, length, iova, access, mr);
924 if (err)
925 goto err_cleanup;
926
927 rxe_finalize(mr);
928 return &mr->ibmr;
929
930 err_cleanup:
931 rxe_cleanup(mr);
932 err_free:
933 kfree(mr);
934 err_out:
935 return ERR_PTR(err);
936 }
937
rxe_alloc_mr(struct ib_pd * ibpd,enum ib_mr_type mr_type,u32 max_num_sg)938 static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
939 u32 max_num_sg)
940 {
941 struct rxe_dev *rxe = to_rdev(ibpd->device);
942 struct rxe_pd *pd = to_rpd(ibpd);
943 struct rxe_mr *mr;
944 int err;
945
946 if (mr_type != IB_MR_TYPE_MEM_REG)
947 return ERR_PTR(-EINVAL);
948
949 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
950 if (!mr) {
951 err = -ENOMEM;
952 goto err_out;
953 }
954
955 err = rxe_add_to_pool(&rxe->mr_pool, mr);
956 if (err)
957 goto err_free;
958
959 rxe_get(pd);
960 mr->ibmr.pd = ibpd;
961 mr->ibmr.device = ibpd->device;
962
963 err = rxe_mr_init_fast(max_num_sg, mr);
964 if (err)
965 goto err_cleanup;
966
967 rxe_finalize(mr);
968 return &mr->ibmr;
969
970 err_cleanup:
971 rxe_cleanup(mr);
972 err_free:
973 kfree(mr);
974 err_out:
975 return ERR_PTR(err);
976 }
977
parent_show(struct device * device,struct device_attribute * attr,char * buf)978 static ssize_t parent_show(struct device *device,
979 struct device_attribute *attr, char *buf)
980 {
981 struct rxe_dev *rxe =
982 rdma_device_to_drv_device(device, struct rxe_dev, ib_dev);
983
984 return sysfs_emit(buf, "%s\n", rxe_parent_name(rxe, 1));
985 }
986
987 static DEVICE_ATTR_RO(parent);
988
989 static struct attribute *rxe_dev_attributes[] = {
990 &dev_attr_parent.attr,
991 NULL
992 };
993
994 static const struct attribute_group rxe_attr_group = {
995 .attrs = rxe_dev_attributes,
996 };
997
rxe_enable_driver(struct ib_device * ib_dev)998 static int rxe_enable_driver(struct ib_device *ib_dev)
999 {
1000 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
1001
1002 rxe_set_port_state(rxe);
1003 dev_info(&rxe->ib_dev.dev, "added %s\n", netdev_name(rxe->ndev));
1004 return 0;
1005 }
1006
1007 static const struct ib_device_ops rxe_dev_ops = {
1008 .owner = THIS_MODULE,
1009 .driver_id = RDMA_DRIVER_RXE,
1010 .uverbs_abi_ver = RXE_UVERBS_ABI_VERSION,
1011
1012 .alloc_hw_port_stats = rxe_ib_alloc_hw_port_stats,
1013 .alloc_mr = rxe_alloc_mr,
1014 .alloc_mw = rxe_alloc_mw,
1015 .alloc_pd = rxe_alloc_pd,
1016 .alloc_ucontext = rxe_alloc_ucontext,
1017 .attach_mcast = rxe_attach_mcast,
1018 .create_ah = rxe_create_ah,
1019 .create_cq = rxe_create_cq,
1020 .create_qp = rxe_create_qp,
1021 .create_srq = rxe_create_srq,
1022 .create_user_ah = rxe_create_ah,
1023 .dealloc_driver = rxe_dealloc,
1024 .dealloc_mw = rxe_dealloc_mw,
1025 .dealloc_pd = rxe_dealloc_pd,
1026 .dealloc_ucontext = rxe_dealloc_ucontext,
1027 .dereg_mr = rxe_dereg_mr,
1028 .destroy_ah = rxe_destroy_ah,
1029 .destroy_cq = rxe_destroy_cq,
1030 .destroy_qp = rxe_destroy_qp,
1031 .destroy_srq = rxe_destroy_srq,
1032 .detach_mcast = rxe_detach_mcast,
1033 .device_group = &rxe_attr_group,
1034 .enable_driver = rxe_enable_driver,
1035 .get_dma_mr = rxe_get_dma_mr,
1036 .get_hw_stats = rxe_ib_get_hw_stats,
1037 .get_link_layer = rxe_get_link_layer,
1038 .get_port_immutable = rxe_port_immutable,
1039 .map_mr_sg = rxe_map_mr_sg,
1040 .mmap = rxe_mmap,
1041 .modify_ah = rxe_modify_ah,
1042 .modify_device = rxe_modify_device,
1043 .modify_port = rxe_modify_port,
1044 .modify_qp = rxe_modify_qp,
1045 .modify_srq = rxe_modify_srq,
1046 .peek_cq = rxe_peek_cq,
1047 .poll_cq = rxe_poll_cq,
1048 .post_recv = rxe_post_recv,
1049 .post_send = rxe_post_send,
1050 .post_srq_recv = rxe_post_srq_recv,
1051 .query_ah = rxe_query_ah,
1052 .query_device = rxe_query_device,
1053 .query_pkey = rxe_query_pkey,
1054 .query_port = rxe_query_port,
1055 .query_qp = rxe_query_qp,
1056 .query_srq = rxe_query_srq,
1057 .reg_user_mr = rxe_reg_user_mr,
1058 .req_notify_cq = rxe_req_notify_cq,
1059 .resize_cq = rxe_resize_cq,
1060
1061 INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah),
1062 INIT_RDMA_OBJ_SIZE(ib_cq, rxe_cq, ibcq),
1063 INIT_RDMA_OBJ_SIZE(ib_pd, rxe_pd, ibpd),
1064 INIT_RDMA_OBJ_SIZE(ib_qp, rxe_qp, ibqp),
1065 INIT_RDMA_OBJ_SIZE(ib_srq, rxe_srq, ibsrq),
1066 INIT_RDMA_OBJ_SIZE(ib_ucontext, rxe_ucontext, ibuc),
1067 INIT_RDMA_OBJ_SIZE(ib_mw, rxe_mw, ibmw),
1068 };
1069
rxe_register_device(struct rxe_dev * rxe,const char * ibdev_name)1070 int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name)
1071 {
1072 int err;
1073 struct ib_device *dev = &rxe->ib_dev;
1074
1075 strscpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
1076
1077 dev->node_type = RDMA_NODE_IB_CA;
1078 dev->phys_port_cnt = 1;
1079 dev->num_comp_vectors = num_possible_cpus();
1080 dev->local_dma_lkey = 0;
1081 addrconf_addr_eui48((unsigned char *)&dev->node_guid,
1082 rxe->ndev->dev_addr);
1083
1084 dev->uverbs_cmd_mask |= BIT_ULL(IB_USER_VERBS_CMD_POST_SEND) |
1085 BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ);
1086
1087 ib_set_device_ops(dev, &rxe_dev_ops);
1088 err = ib_device_set_netdev(&rxe->ib_dev, rxe->ndev, 1);
1089 if (err)
1090 return err;
1091
1092 err = rxe_icrc_init(rxe);
1093 if (err)
1094 return err;
1095
1096 err = ib_register_device(dev, ibdev_name, NULL);
1097 if (err)
1098 rxe_dbg(rxe, "failed with error %d\n", err);
1099
1100 /*
1101 * Note that rxe may be invalid at this point if another thread
1102 * unregistered it.
1103 */
1104 return err;
1105 }
1106