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/skbuff.h>
8 #include <linux/delay.h>
9 #include <linux/sched.h>
10 #include <linux/vmalloc.h>
11 #include <rdma/uverbs_ioctl.h>
12
13 #include "rxe.h"
14 #include "rxe_loc.h"
15 #include "rxe_queue.h"
16 #include "rxe_task.h"
17
rxe_qp_chk_cap(struct rxe_dev * rxe,struct ib_qp_cap * cap,int has_srq)18 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap,
19 int has_srq)
20 {
21 if (cap->max_send_wr > rxe->attr.max_qp_wr) {
22 pr_debug("invalid send wr = %u > %d\n",
23 cap->max_send_wr, rxe->attr.max_qp_wr);
24 goto err1;
25 }
26
27 if (cap->max_send_sge > rxe->attr.max_send_sge) {
28 pr_debug("invalid send sge = %u > %d\n",
29 cap->max_send_sge, rxe->attr.max_send_sge);
30 goto err1;
31 }
32
33 if (!has_srq) {
34 if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
35 pr_debug("invalid recv wr = %u > %d\n",
36 cap->max_recv_wr, rxe->attr.max_qp_wr);
37 goto err1;
38 }
39
40 if (cap->max_recv_sge > rxe->attr.max_recv_sge) {
41 pr_debug("invalid recv sge = %u > %d\n",
42 cap->max_recv_sge, rxe->attr.max_recv_sge);
43 goto err1;
44 }
45 }
46
47 if (cap->max_inline_data > rxe->max_inline_data) {
48 pr_debug("invalid max inline data = %u > %d\n",
49 cap->max_inline_data, rxe->max_inline_data);
50 goto err1;
51 }
52
53 return 0;
54
55 err1:
56 return -EINVAL;
57 }
58
rxe_qp_chk_init(struct rxe_dev * rxe,struct ib_qp_init_attr * init)59 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init)
60 {
61 struct ib_qp_cap *cap = &init->cap;
62 struct rxe_port *port;
63 int port_num = init->port_num;
64
65 switch (init->qp_type) {
66 case IB_QPT_GSI:
67 case IB_QPT_RC:
68 case IB_QPT_UC:
69 case IB_QPT_UD:
70 break;
71 default:
72 return -EOPNOTSUPP;
73 }
74
75 if (!init->recv_cq || !init->send_cq) {
76 pr_debug("missing cq\n");
77 goto err1;
78 }
79
80 if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
81 goto err1;
82
83 if (init->qp_type == IB_QPT_GSI) {
84 if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) {
85 pr_debug("invalid port = %d\n", port_num);
86 goto err1;
87 }
88
89 port = &rxe->port;
90
91 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
92 pr_debug("GSI QP exists for port %d\n", port_num);
93 goto err1;
94 }
95 }
96
97 return 0;
98
99 err1:
100 return -EINVAL;
101 }
102
alloc_rd_atomic_resources(struct rxe_qp * qp,unsigned int n)103 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
104 {
105 qp->resp.res_head = 0;
106 qp->resp.res_tail = 0;
107 qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
108
109 if (!qp->resp.resources)
110 return -ENOMEM;
111
112 return 0;
113 }
114
free_rd_atomic_resources(struct rxe_qp * qp)115 static void free_rd_atomic_resources(struct rxe_qp *qp)
116 {
117 if (qp->resp.resources) {
118 int i;
119
120 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
121 struct resp_res *res = &qp->resp.resources[i];
122
123 free_rd_atomic_resource(res);
124 }
125 kfree(qp->resp.resources);
126 qp->resp.resources = NULL;
127 }
128 }
129
free_rd_atomic_resource(struct resp_res * res)130 void free_rd_atomic_resource(struct resp_res *res)
131 {
132 res->type = 0;
133 }
134
cleanup_rd_atomic_resources(struct rxe_qp * qp)135 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
136 {
137 int i;
138 struct resp_res *res;
139
140 if (qp->resp.resources) {
141 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
142 res = &qp->resp.resources[i];
143 free_rd_atomic_resource(res);
144 }
145 }
146 }
147
rxe_qp_init_misc(struct rxe_dev * rxe,struct rxe_qp * qp,struct ib_qp_init_attr * init)148 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
149 struct ib_qp_init_attr *init)
150 {
151 struct rxe_port *port;
152 u32 qpn;
153
154 qp->sq_sig_type = init->sq_sig_type;
155 qp->attr.path_mtu = 1;
156 qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu);
157
158 qpn = qp->elem.index;
159 port = &rxe->port;
160
161 switch (init->qp_type) {
162 case IB_QPT_GSI:
163 qp->ibqp.qp_num = 1;
164 port->qp_gsi_index = qpn;
165 qp->attr.port_num = init->port_num;
166 break;
167
168 default:
169 qp->ibqp.qp_num = qpn;
170 break;
171 }
172
173 spin_lock_init(&qp->state_lock);
174
175 spin_lock_init(&qp->req.task.state_lock);
176 spin_lock_init(&qp->resp.task.state_lock);
177 spin_lock_init(&qp->comp.task.state_lock);
178
179 spin_lock_init(&qp->sq.sq_lock);
180 spin_lock_init(&qp->rq.producer_lock);
181 spin_lock_init(&qp->rq.consumer_lock);
182
183 atomic_set(&qp->ssn, 0);
184 atomic_set(&qp->skb_out, 0);
185 }
186
rxe_qp_init_req(struct rxe_dev * rxe,struct rxe_qp * qp,struct ib_qp_init_attr * init,struct ib_udata * udata,struct rxe_create_qp_resp __user * uresp)187 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
188 struct ib_qp_init_attr *init, struct ib_udata *udata,
189 struct rxe_create_qp_resp __user *uresp)
190 {
191 int err;
192 int wqe_size;
193 enum queue_type type;
194
195 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
196 if (err < 0)
197 return err;
198 qp->sk->sk->sk_user_data = qp;
199
200 /* pick a source UDP port number for this QP based on
201 * the source QPN. this spreads traffic for different QPs
202 * across different NIC RX queues (while using a single
203 * flow for a given QP to maintain packet order).
204 * the port number must be in the Dynamic Ports range
205 * (0xc000 - 0xffff).
206 */
207 qp->src_port = RXE_ROCE_V2_SPORT + (hash_32(qp_num(qp), 14) & 0x3fff);
208 qp->sq.max_wr = init->cap.max_send_wr;
209
210 /* These caps are limited by rxe_qp_chk_cap() done by the caller */
211 wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge),
212 init->cap.max_inline_data);
213 qp->sq.max_sge = init->cap.max_send_sge =
214 wqe_size / sizeof(struct ib_sge);
215 qp->sq.max_inline = init->cap.max_inline_data = wqe_size;
216 wqe_size += sizeof(struct rxe_send_wqe);
217
218 type = QUEUE_TYPE_FROM_CLIENT;
219 qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr,
220 wqe_size, type);
221 if (!qp->sq.queue)
222 return -ENOMEM;
223
224 err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata,
225 qp->sq.queue->buf, qp->sq.queue->buf_size,
226 &qp->sq.queue->ip);
227
228 if (err) {
229 vfree(qp->sq.queue->buf);
230 kfree(qp->sq.queue);
231 qp->sq.queue = NULL;
232 return err;
233 }
234
235 qp->req.wqe_index = queue_get_producer(qp->sq.queue,
236 QUEUE_TYPE_FROM_CLIENT);
237
238 qp->req.state = QP_STATE_RESET;
239 qp->comp.state = QP_STATE_RESET;
240 qp->req.opcode = -1;
241 qp->comp.opcode = -1;
242
243 skb_queue_head_init(&qp->req_pkts);
244
245 rxe_init_task(&qp->req.task, qp,
246 rxe_requester, "req");
247 rxe_init_task(&qp->comp.task, qp,
248 rxe_completer, "comp");
249
250 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
251 if (init->qp_type == IB_QPT_RC) {
252 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
253 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
254 }
255 return 0;
256 }
257
rxe_qp_init_resp(struct rxe_dev * rxe,struct rxe_qp * qp,struct ib_qp_init_attr * init,struct ib_udata * udata,struct rxe_create_qp_resp __user * uresp)258 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
259 struct ib_qp_init_attr *init,
260 struct ib_udata *udata,
261 struct rxe_create_qp_resp __user *uresp)
262 {
263 int err;
264 int wqe_size;
265 enum queue_type type;
266
267 if (!qp->srq) {
268 qp->rq.max_wr = init->cap.max_recv_wr;
269 qp->rq.max_sge = init->cap.max_recv_sge;
270
271 wqe_size = rcv_wqe_size(qp->rq.max_sge);
272
273 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
274 qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
275
276 type = QUEUE_TYPE_FROM_CLIENT;
277 qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr,
278 wqe_size, type);
279 if (!qp->rq.queue)
280 return -ENOMEM;
281
282 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata,
283 qp->rq.queue->buf, qp->rq.queue->buf_size,
284 &qp->rq.queue->ip);
285 if (err) {
286 vfree(qp->rq.queue->buf);
287 kfree(qp->rq.queue);
288 qp->rq.queue = NULL;
289 return err;
290 }
291 }
292
293 skb_queue_head_init(&qp->resp_pkts);
294
295 rxe_init_task(&qp->resp.task, qp,
296 rxe_responder, "resp");
297
298 qp->resp.opcode = OPCODE_NONE;
299 qp->resp.msn = 0;
300 qp->resp.state = QP_STATE_RESET;
301
302 return 0;
303 }
304
305 /* called by the create qp verb */
rxe_qp_from_init(struct rxe_dev * rxe,struct rxe_qp * qp,struct rxe_pd * pd,struct ib_qp_init_attr * init,struct rxe_create_qp_resp __user * uresp,struct ib_pd * ibpd,struct ib_udata * udata)306 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
307 struct ib_qp_init_attr *init,
308 struct rxe_create_qp_resp __user *uresp,
309 struct ib_pd *ibpd,
310 struct ib_udata *udata)
311 {
312 int err;
313 struct rxe_cq *rcq = to_rcq(init->recv_cq);
314 struct rxe_cq *scq = to_rcq(init->send_cq);
315 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
316
317 rxe_get(pd);
318 rxe_get(rcq);
319 rxe_get(scq);
320 if (srq)
321 rxe_get(srq);
322
323 qp->pd = pd;
324 qp->rcq = rcq;
325 qp->scq = scq;
326 qp->srq = srq;
327
328 atomic_inc(&rcq->num_wq);
329 atomic_inc(&scq->num_wq);
330
331 rxe_qp_init_misc(rxe, qp, init);
332
333 err = rxe_qp_init_req(rxe, qp, init, udata, uresp);
334 if (err)
335 goto err1;
336
337 err = rxe_qp_init_resp(rxe, qp, init, udata, uresp);
338 if (err)
339 goto err2;
340
341 qp->attr.qp_state = IB_QPS_RESET;
342 qp->valid = 1;
343
344 return 0;
345
346 err2:
347 rxe_queue_cleanup(qp->sq.queue);
348 qp->sq.queue = NULL;
349 err1:
350 atomic_dec(&rcq->num_wq);
351 atomic_dec(&scq->num_wq);
352
353 qp->pd = NULL;
354 qp->rcq = NULL;
355 qp->scq = NULL;
356 qp->srq = NULL;
357
358 if (srq)
359 rxe_put(srq);
360 rxe_put(scq);
361 rxe_put(rcq);
362 rxe_put(pd);
363
364 return err;
365 }
366
367 /* called by the query qp verb */
rxe_qp_to_init(struct rxe_qp * qp,struct ib_qp_init_attr * init)368 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
369 {
370 init->event_handler = qp->ibqp.event_handler;
371 init->qp_context = qp->ibqp.qp_context;
372 init->send_cq = qp->ibqp.send_cq;
373 init->recv_cq = qp->ibqp.recv_cq;
374 init->srq = qp->ibqp.srq;
375
376 init->cap.max_send_wr = qp->sq.max_wr;
377 init->cap.max_send_sge = qp->sq.max_sge;
378 init->cap.max_inline_data = qp->sq.max_inline;
379
380 if (!qp->srq) {
381 init->cap.max_recv_wr = qp->rq.max_wr;
382 init->cap.max_recv_sge = qp->rq.max_sge;
383 }
384
385 init->sq_sig_type = qp->sq_sig_type;
386
387 init->qp_type = qp->ibqp.qp_type;
388 init->port_num = 1;
389
390 return 0;
391 }
392
393 /* called by the modify qp verb, this routine checks all the parameters before
394 * making any changes
395 */
rxe_qp_chk_attr(struct rxe_dev * rxe,struct rxe_qp * qp,struct ib_qp_attr * attr,int mask)396 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
397 struct ib_qp_attr *attr, int mask)
398 {
399 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
400 attr->cur_qp_state : qp->attr.qp_state;
401 enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
402 attr->qp_state : cur_state;
403
404 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) {
405 pr_debug("invalid mask or state for qp\n");
406 goto err1;
407 }
408
409 if (mask & IB_QP_STATE) {
410 if (cur_state == IB_QPS_SQD) {
411 if (qp->req.state == QP_STATE_DRAIN &&
412 new_state != IB_QPS_ERR)
413 goto err1;
414 }
415 }
416
417 if (mask & IB_QP_PORT) {
418 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) {
419 pr_debug("invalid port %d\n", attr->port_num);
420 goto err1;
421 }
422 }
423
424 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
425 goto err1;
426
427 if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
428 goto err1;
429
430 if (mask & IB_QP_ALT_PATH) {
431 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
432 goto err1;
433 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) {
434 pr_debug("invalid alt port %d\n", attr->alt_port_num);
435 goto err1;
436 }
437 if (attr->alt_timeout > 31) {
438 pr_debug("invalid QP alt timeout %d > 31\n",
439 attr->alt_timeout);
440 goto err1;
441 }
442 }
443
444 if (mask & IB_QP_PATH_MTU) {
445 struct rxe_port *port = &rxe->port;
446
447 enum ib_mtu max_mtu = port->attr.max_mtu;
448 enum ib_mtu mtu = attr->path_mtu;
449
450 if (mtu > max_mtu) {
451 pr_debug("invalid mtu (%d) > (%d)\n",
452 ib_mtu_enum_to_int(mtu),
453 ib_mtu_enum_to_int(max_mtu));
454 goto err1;
455 }
456 }
457
458 if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
459 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
460 pr_debug("invalid max_rd_atomic %d > %d\n",
461 attr->max_rd_atomic,
462 rxe->attr.max_qp_rd_atom);
463 goto err1;
464 }
465 }
466
467 if (mask & IB_QP_TIMEOUT) {
468 if (attr->timeout > 31) {
469 pr_debug("invalid QP timeout %d > 31\n", attr->timeout);
470 goto err1;
471 }
472 }
473
474 return 0;
475
476 err1:
477 return -EINVAL;
478 }
479
480 /* move the qp to the reset state */
rxe_qp_reset(struct rxe_qp * qp)481 static void rxe_qp_reset(struct rxe_qp *qp)
482 {
483 /* stop tasks from running */
484 rxe_disable_task(&qp->resp.task);
485
486 /* stop request/comp */
487 if (qp->sq.queue) {
488 if (qp_type(qp) == IB_QPT_RC)
489 rxe_disable_task(&qp->comp.task);
490 rxe_disable_task(&qp->req.task);
491 }
492
493 /* move qp to the reset state */
494 qp->req.state = QP_STATE_RESET;
495 qp->comp.state = QP_STATE_RESET;
496 qp->resp.state = QP_STATE_RESET;
497
498 /* let state machines reset themselves drain work and packet queues
499 * etc.
500 */
501 __rxe_do_task(&qp->resp.task);
502
503 if (qp->sq.queue) {
504 __rxe_do_task(&qp->comp.task);
505 __rxe_do_task(&qp->req.task);
506 rxe_queue_reset(qp->sq.queue);
507 }
508
509 /* cleanup attributes */
510 atomic_set(&qp->ssn, 0);
511 qp->req.opcode = -1;
512 qp->req.need_retry = 0;
513 qp->req.wait_for_rnr_timer = 0;
514 qp->req.noack_pkts = 0;
515 qp->resp.msn = 0;
516 qp->resp.opcode = -1;
517 qp->resp.drop_msg = 0;
518 qp->resp.goto_error = 0;
519 qp->resp.sent_psn_nak = 0;
520
521 if (qp->resp.mr) {
522 rxe_put(qp->resp.mr);
523 qp->resp.mr = NULL;
524 }
525
526 cleanup_rd_atomic_resources(qp);
527
528 /* reenable tasks */
529 rxe_enable_task(&qp->resp.task);
530
531 if (qp->sq.queue) {
532 if (qp_type(qp) == IB_QPT_RC)
533 rxe_enable_task(&qp->comp.task);
534
535 rxe_enable_task(&qp->req.task);
536 }
537 }
538
539 /* drain the send queue */
rxe_qp_drain(struct rxe_qp * qp)540 static void rxe_qp_drain(struct rxe_qp *qp)
541 {
542 if (qp->sq.queue) {
543 if (qp->req.state != QP_STATE_DRAINED) {
544 qp->req.state = QP_STATE_DRAIN;
545 if (qp_type(qp) == IB_QPT_RC)
546 rxe_run_task(&qp->comp.task, 1);
547 else
548 __rxe_do_task(&qp->comp.task);
549 rxe_run_task(&qp->req.task, 1);
550 }
551 }
552 }
553
554 /* move the qp to the error state */
rxe_qp_error(struct rxe_qp * qp)555 void rxe_qp_error(struct rxe_qp *qp)
556 {
557 qp->req.state = QP_STATE_ERROR;
558 qp->resp.state = QP_STATE_ERROR;
559 qp->comp.state = QP_STATE_ERROR;
560 qp->attr.qp_state = IB_QPS_ERR;
561
562 /* drain work and packet queues */
563 rxe_run_task(&qp->resp.task, 1);
564
565 if (qp_type(qp) == IB_QPT_RC)
566 rxe_run_task(&qp->comp.task, 1);
567 else
568 __rxe_do_task(&qp->comp.task);
569 rxe_run_task(&qp->req.task, 1);
570 }
571
572 /* called by the modify qp verb */
rxe_qp_from_attr(struct rxe_qp * qp,struct ib_qp_attr * attr,int mask,struct ib_udata * udata)573 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
574 struct ib_udata *udata)
575 {
576 int err;
577
578 if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
579 int max_rd_atomic = attr->max_rd_atomic ?
580 roundup_pow_of_two(attr->max_rd_atomic) : 0;
581
582 qp->attr.max_rd_atomic = max_rd_atomic;
583 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
584 }
585
586 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
587 int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
588 roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
589
590 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
591
592 free_rd_atomic_resources(qp);
593
594 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
595 if (err)
596 return err;
597 }
598
599 if (mask & IB_QP_CUR_STATE)
600 qp->attr.cur_qp_state = attr->qp_state;
601
602 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
603 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
604
605 if (mask & IB_QP_ACCESS_FLAGS)
606 qp->attr.qp_access_flags = attr->qp_access_flags;
607
608 if (mask & IB_QP_PKEY_INDEX)
609 qp->attr.pkey_index = attr->pkey_index;
610
611 if (mask & IB_QP_PORT)
612 qp->attr.port_num = attr->port_num;
613
614 if (mask & IB_QP_QKEY)
615 qp->attr.qkey = attr->qkey;
616
617 if (mask & IB_QP_AV)
618 rxe_init_av(&attr->ah_attr, &qp->pri_av);
619
620 if (mask & IB_QP_ALT_PATH) {
621 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av);
622 qp->attr.alt_port_num = attr->alt_port_num;
623 qp->attr.alt_pkey_index = attr->alt_pkey_index;
624 qp->attr.alt_timeout = attr->alt_timeout;
625 }
626
627 if (mask & IB_QP_PATH_MTU) {
628 qp->attr.path_mtu = attr->path_mtu;
629 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
630 }
631
632 if (mask & IB_QP_TIMEOUT) {
633 qp->attr.timeout = attr->timeout;
634 if (attr->timeout == 0) {
635 qp->qp_timeout_jiffies = 0;
636 } else {
637 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
638 int j = nsecs_to_jiffies(4096ULL << attr->timeout);
639
640 qp->qp_timeout_jiffies = j ? j : 1;
641 }
642 }
643
644 if (mask & IB_QP_RETRY_CNT) {
645 qp->attr.retry_cnt = attr->retry_cnt;
646 qp->comp.retry_cnt = attr->retry_cnt;
647 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
648 attr->retry_cnt);
649 }
650
651 if (mask & IB_QP_RNR_RETRY) {
652 qp->attr.rnr_retry = attr->rnr_retry;
653 qp->comp.rnr_retry = attr->rnr_retry;
654 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
655 attr->rnr_retry);
656 }
657
658 if (mask & IB_QP_RQ_PSN) {
659 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
660 qp->resp.psn = qp->attr.rq_psn;
661 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
662 qp->resp.psn);
663 }
664
665 if (mask & IB_QP_MIN_RNR_TIMER) {
666 qp->attr.min_rnr_timer = attr->min_rnr_timer;
667 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
668 attr->min_rnr_timer);
669 }
670
671 if (mask & IB_QP_SQ_PSN) {
672 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
673 qp->req.psn = qp->attr.sq_psn;
674 qp->comp.psn = qp->attr.sq_psn;
675 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
676 }
677
678 if (mask & IB_QP_PATH_MIG_STATE)
679 qp->attr.path_mig_state = attr->path_mig_state;
680
681 if (mask & IB_QP_DEST_QPN)
682 qp->attr.dest_qp_num = attr->dest_qp_num;
683
684 if (mask & IB_QP_STATE) {
685 qp->attr.qp_state = attr->qp_state;
686
687 switch (attr->qp_state) {
688 case IB_QPS_RESET:
689 pr_debug("qp#%d state -> RESET\n", qp_num(qp));
690 rxe_qp_reset(qp);
691 break;
692
693 case IB_QPS_INIT:
694 pr_debug("qp#%d state -> INIT\n", qp_num(qp));
695 qp->req.state = QP_STATE_INIT;
696 qp->resp.state = QP_STATE_INIT;
697 qp->comp.state = QP_STATE_INIT;
698 break;
699
700 case IB_QPS_RTR:
701 pr_debug("qp#%d state -> RTR\n", qp_num(qp));
702 qp->resp.state = QP_STATE_READY;
703 break;
704
705 case IB_QPS_RTS:
706 pr_debug("qp#%d state -> RTS\n", qp_num(qp));
707 qp->req.state = QP_STATE_READY;
708 qp->comp.state = QP_STATE_READY;
709 break;
710
711 case IB_QPS_SQD:
712 pr_debug("qp#%d state -> SQD\n", qp_num(qp));
713 rxe_qp_drain(qp);
714 break;
715
716 case IB_QPS_SQE:
717 pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
718 /* Not possible from modify_qp. */
719 break;
720
721 case IB_QPS_ERR:
722 pr_debug("qp#%d state -> ERR\n", qp_num(qp));
723 rxe_qp_error(qp);
724 break;
725 }
726 }
727
728 return 0;
729 }
730
731 /* called by the query qp verb */
rxe_qp_to_attr(struct rxe_qp * qp,struct ib_qp_attr * attr,int mask)732 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
733 {
734 *attr = qp->attr;
735
736 attr->rq_psn = qp->resp.psn;
737 attr->sq_psn = qp->req.psn;
738
739 attr->cap.max_send_wr = qp->sq.max_wr;
740 attr->cap.max_send_sge = qp->sq.max_sge;
741 attr->cap.max_inline_data = qp->sq.max_inline;
742
743 if (!qp->srq) {
744 attr->cap.max_recv_wr = qp->rq.max_wr;
745 attr->cap.max_recv_sge = qp->rq.max_sge;
746 }
747
748 rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
749 rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
750
751 if (qp->req.state == QP_STATE_DRAIN) {
752 attr->sq_draining = 1;
753 /* applications that get this state
754 * typically spin on it. yield the
755 * processor
756 */
757 cond_resched();
758 } else {
759 attr->sq_draining = 0;
760 }
761
762 pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
763
764 return 0;
765 }
766
rxe_qp_chk_destroy(struct rxe_qp * qp)767 int rxe_qp_chk_destroy(struct rxe_qp *qp)
768 {
769 /* See IBA o10-2.2.3
770 * An attempt to destroy a QP while attached to a mcast group
771 * will fail immediately.
772 */
773 if (atomic_read(&qp->mcg_num)) {
774 pr_debug("Attempt to destroy QP while attached to multicast group\n");
775 return -EBUSY;
776 }
777
778 return 0;
779 }
780
781 /* called when the last reference to the qp is dropped */
rxe_qp_do_cleanup(struct work_struct * work)782 static void rxe_qp_do_cleanup(struct work_struct *work)
783 {
784 struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
785
786 qp->valid = 0;
787 qp->qp_timeout_jiffies = 0;
788 rxe_cleanup_task(&qp->resp.task);
789
790 if (qp_type(qp) == IB_QPT_RC) {
791 del_timer_sync(&qp->retrans_timer);
792 del_timer_sync(&qp->rnr_nak_timer);
793 }
794
795 rxe_cleanup_task(&qp->req.task);
796 rxe_cleanup_task(&qp->comp.task);
797
798 /* flush out any receive wr's or pending requests */
799 if (qp->req.task.func)
800 __rxe_do_task(&qp->req.task);
801
802 if (qp->sq.queue) {
803 __rxe_do_task(&qp->comp.task);
804 __rxe_do_task(&qp->req.task);
805 }
806
807 if (qp->sq.queue)
808 rxe_queue_cleanup(qp->sq.queue);
809
810 if (qp->srq)
811 rxe_put(qp->srq);
812
813 if (qp->rq.queue)
814 rxe_queue_cleanup(qp->rq.queue);
815
816 if (qp->scq) {
817 atomic_dec(&qp->scq->num_wq);
818 rxe_put(qp->scq);
819 }
820
821 if (qp->rcq) {
822 atomic_dec(&qp->rcq->num_wq);
823 rxe_put(qp->rcq);
824 }
825
826 if (qp->pd)
827 rxe_put(qp->pd);
828
829 if (qp->resp.mr)
830 rxe_put(qp->resp.mr);
831
832 free_rd_atomic_resources(qp);
833
834 if (qp->sk) {
835 if (qp_type(qp) == IB_QPT_RC)
836 sk_dst_reset(qp->sk->sk);
837
838 kernel_sock_shutdown(qp->sk, SHUT_RDWR);
839 sock_release(qp->sk);
840 }
841 }
842
843 /* called when the last reference to the qp is dropped */
rxe_qp_cleanup(struct rxe_pool_elem * elem)844 void rxe_qp_cleanup(struct rxe_pool_elem *elem)
845 {
846 struct rxe_qp *qp = container_of(elem, typeof(*qp), elem);
847
848 execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
849 }
850