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_warn("invalid send wr = %d > %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_warn("invalid send sge = %d > %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_warn("invalid recv wr = %d > %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_warn("invalid recv sge = %d > %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_warn("invalid max inline data = %d > %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_SMI:
67 case IB_QPT_GSI:
68 case IB_QPT_RC:
69 case IB_QPT_UC:
70 case IB_QPT_UD:
71 break;
72 default:
73 return -EOPNOTSUPP;
74 }
75
76 if (!init->recv_cq || !init->send_cq) {
77 pr_warn("missing cq\n");
78 goto err1;
79 }
80
81 if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
82 goto err1;
83
84 if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) {
85 if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) {
86 pr_warn("invalid port = %d\n", port_num);
87 goto err1;
88 }
89
90 port = &rxe->port;
91
92 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) {
93 pr_warn("SMI QP exists for port %d\n", port_num);
94 goto err1;
95 }
96
97 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
98 pr_warn("GSI QP exists for port %d\n", port_num);
99 goto err1;
100 }
101 }
102
103 return 0;
104
105 err1:
106 return -EINVAL;
107 }
108
alloc_rd_atomic_resources(struct rxe_qp * qp,unsigned int n)109 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
110 {
111 qp->resp.res_head = 0;
112 qp->resp.res_tail = 0;
113 qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
114
115 if (!qp->resp.resources)
116 return -ENOMEM;
117
118 return 0;
119 }
120
free_rd_atomic_resources(struct rxe_qp * qp)121 static void free_rd_atomic_resources(struct rxe_qp *qp)
122 {
123 if (qp->resp.resources) {
124 int i;
125
126 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
127 struct resp_res *res = &qp->resp.resources[i];
128
129 free_rd_atomic_resource(qp, res);
130 }
131 kfree(qp->resp.resources);
132 qp->resp.resources = NULL;
133 }
134 }
135
free_rd_atomic_resource(struct rxe_qp * qp,struct resp_res * res)136 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res)
137 {
138 if (res->type == RXE_ATOMIC_MASK) {
139 kfree_skb(res->atomic.skb);
140 } else if (res->type == RXE_READ_MASK) {
141 if (res->read.mr)
142 rxe_drop_ref(res->read.mr);
143 }
144 res->type = 0;
145 }
146
cleanup_rd_atomic_resources(struct rxe_qp * qp)147 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
148 {
149 int i;
150 struct resp_res *res;
151
152 if (qp->resp.resources) {
153 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
154 res = &qp->resp.resources[i];
155 free_rd_atomic_resource(qp, res);
156 }
157 }
158 }
159
rxe_qp_init_misc(struct rxe_dev * rxe,struct rxe_qp * qp,struct ib_qp_init_attr * init)160 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
161 struct ib_qp_init_attr *init)
162 {
163 struct rxe_port *port;
164 u32 qpn;
165
166 qp->sq_sig_type = init->sq_sig_type;
167 qp->attr.path_mtu = 1;
168 qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu);
169
170 qpn = qp->pelem.index;
171 port = &rxe->port;
172
173 switch (init->qp_type) {
174 case IB_QPT_SMI:
175 qp->ibqp.qp_num = 0;
176 port->qp_smi_index = qpn;
177 qp->attr.port_num = init->port_num;
178 break;
179
180 case IB_QPT_GSI:
181 qp->ibqp.qp_num = 1;
182 port->qp_gsi_index = qpn;
183 qp->attr.port_num = init->port_num;
184 break;
185
186 default:
187 qp->ibqp.qp_num = qpn;
188 break;
189 }
190
191 INIT_LIST_HEAD(&qp->grp_list);
192
193 spin_lock_init(&qp->grp_lock);
194 spin_lock_init(&qp->state_lock);
195
196 atomic_set(&qp->ssn, 0);
197 atomic_set(&qp->skb_out, 0);
198 }
199
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)200 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
201 struct ib_qp_init_attr *init, struct ib_udata *udata,
202 struct rxe_create_qp_resp __user *uresp)
203 {
204 int err;
205 int wqe_size;
206 enum queue_type type;
207
208 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
209 if (err < 0)
210 return err;
211 qp->sk->sk->sk_user_data = qp;
212
213 /* pick a source UDP port number for this QP based on
214 * the source QPN. this spreads traffic for different QPs
215 * across different NIC RX queues (while using a single
216 * flow for a given QP to maintain packet order).
217 * the port number must be in the Dynamic Ports range
218 * (0xc000 - 0xffff).
219 */
220 qp->src_port = RXE_ROCE_V2_SPORT +
221 (hash_32_generic(qp_num(qp), 14) & 0x3fff);
222 qp->sq.max_wr = init->cap.max_send_wr;
223
224 /* These caps are limited by rxe_qp_chk_cap() done by the caller */
225 wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge),
226 init->cap.max_inline_data);
227 qp->sq.max_sge = init->cap.max_send_sge =
228 wqe_size / sizeof(struct ib_sge);
229 qp->sq.max_inline = init->cap.max_inline_data = wqe_size;
230 wqe_size += sizeof(struct rxe_send_wqe);
231
232 type = QUEUE_TYPE_FROM_CLIENT;
233 qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr,
234 wqe_size, type);
235 if (!qp->sq.queue)
236 return -ENOMEM;
237
238 err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata,
239 qp->sq.queue->buf, qp->sq.queue->buf_size,
240 &qp->sq.queue->ip);
241
242 if (err) {
243 vfree(qp->sq.queue->buf);
244 kfree(qp->sq.queue);
245 qp->sq.queue = NULL;
246 return err;
247 }
248
249 qp->req.wqe_index = queue_get_producer(qp->sq.queue,
250 QUEUE_TYPE_FROM_CLIENT);
251
252 qp->req.state = QP_STATE_RESET;
253 qp->req.opcode = -1;
254 qp->comp.opcode = -1;
255
256 spin_lock_init(&qp->sq.sq_lock);
257 skb_queue_head_init(&qp->req_pkts);
258
259 rxe_init_task(rxe, &qp->req.task, qp,
260 rxe_requester, "req");
261 rxe_init_task(rxe, &qp->comp.task, qp,
262 rxe_completer, "comp");
263
264 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
265 if (init->qp_type == IB_QPT_RC) {
266 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
267 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
268 }
269 return 0;
270 }
271
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)272 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
273 struct ib_qp_init_attr *init,
274 struct ib_udata *udata,
275 struct rxe_create_qp_resp __user *uresp)
276 {
277 int err;
278 int wqe_size;
279 enum queue_type type;
280
281 if (!qp->srq) {
282 qp->rq.max_wr = init->cap.max_recv_wr;
283 qp->rq.max_sge = init->cap.max_recv_sge;
284
285 wqe_size = rcv_wqe_size(qp->rq.max_sge);
286
287 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
288 qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
289
290 type = QUEUE_TYPE_FROM_CLIENT;
291 qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr,
292 wqe_size, type);
293 if (!qp->rq.queue)
294 return -ENOMEM;
295
296 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata,
297 qp->rq.queue->buf, qp->rq.queue->buf_size,
298 &qp->rq.queue->ip);
299 if (err) {
300 vfree(qp->rq.queue->buf);
301 kfree(qp->rq.queue);
302 qp->rq.queue = NULL;
303 return err;
304 }
305 }
306
307 spin_lock_init(&qp->rq.producer_lock);
308 spin_lock_init(&qp->rq.consumer_lock);
309
310 skb_queue_head_init(&qp->resp_pkts);
311
312 rxe_init_task(rxe, &qp->resp.task, qp,
313 rxe_responder, "resp");
314
315 qp->resp.opcode = OPCODE_NONE;
316 qp->resp.msn = 0;
317 qp->resp.state = QP_STATE_RESET;
318
319 return 0;
320 }
321
322 /* 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)323 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
324 struct ib_qp_init_attr *init,
325 struct rxe_create_qp_resp __user *uresp,
326 struct ib_pd *ibpd,
327 struct ib_udata *udata)
328 {
329 int err;
330 struct rxe_cq *rcq = to_rcq(init->recv_cq);
331 struct rxe_cq *scq = to_rcq(init->send_cq);
332 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
333
334 rxe_add_ref(pd);
335 rxe_add_ref(rcq);
336 rxe_add_ref(scq);
337 if (srq)
338 rxe_add_ref(srq);
339
340 qp->pd = pd;
341 qp->rcq = rcq;
342 qp->scq = scq;
343 qp->srq = srq;
344
345 rxe_qp_init_misc(rxe, qp, init);
346
347 err = rxe_qp_init_req(rxe, qp, init, udata, uresp);
348 if (err)
349 goto err1;
350
351 err = rxe_qp_init_resp(rxe, qp, init, udata, uresp);
352 if (err)
353 goto err2;
354
355 qp->attr.qp_state = IB_QPS_RESET;
356 qp->valid = 1;
357
358 return 0;
359
360 err2:
361 rxe_queue_cleanup(qp->sq.queue);
362 qp->sq.queue = NULL;
363 err1:
364 qp->pd = NULL;
365 qp->rcq = NULL;
366 qp->scq = NULL;
367 qp->srq = NULL;
368
369 if (srq)
370 rxe_drop_ref(srq);
371 rxe_drop_ref(scq);
372 rxe_drop_ref(rcq);
373 rxe_drop_ref(pd);
374
375 return err;
376 }
377
378 /* called by the query qp verb */
rxe_qp_to_init(struct rxe_qp * qp,struct ib_qp_init_attr * init)379 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
380 {
381 init->event_handler = qp->ibqp.event_handler;
382 init->qp_context = qp->ibqp.qp_context;
383 init->send_cq = qp->ibqp.send_cq;
384 init->recv_cq = qp->ibqp.recv_cq;
385 init->srq = qp->ibqp.srq;
386
387 init->cap.max_send_wr = qp->sq.max_wr;
388 init->cap.max_send_sge = qp->sq.max_sge;
389 init->cap.max_inline_data = qp->sq.max_inline;
390
391 if (!qp->srq) {
392 init->cap.max_recv_wr = qp->rq.max_wr;
393 init->cap.max_recv_sge = qp->rq.max_sge;
394 }
395
396 init->sq_sig_type = qp->sq_sig_type;
397
398 init->qp_type = qp->ibqp.qp_type;
399 init->port_num = 1;
400
401 return 0;
402 }
403
404 /* called by the modify qp verb, this routine checks all the parameters before
405 * making any changes
406 */
rxe_qp_chk_attr(struct rxe_dev * rxe,struct rxe_qp * qp,struct ib_qp_attr * attr,int mask)407 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
408 struct ib_qp_attr *attr, int mask)
409 {
410 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
411 attr->cur_qp_state : qp->attr.qp_state;
412 enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
413 attr->qp_state : cur_state;
414
415 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) {
416 pr_warn("invalid mask or state for qp\n");
417 goto err1;
418 }
419
420 if (mask & IB_QP_STATE) {
421 if (cur_state == IB_QPS_SQD) {
422 if (qp->req.state == QP_STATE_DRAIN &&
423 new_state != IB_QPS_ERR)
424 goto err1;
425 }
426 }
427
428 if (mask & IB_QP_PORT) {
429 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) {
430 pr_warn("invalid port %d\n", attr->port_num);
431 goto err1;
432 }
433 }
434
435 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
436 goto err1;
437
438 if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
439 goto err1;
440
441 if (mask & IB_QP_ALT_PATH) {
442 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
443 goto err1;
444 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) {
445 pr_warn("invalid alt port %d\n", attr->alt_port_num);
446 goto err1;
447 }
448 if (attr->alt_timeout > 31) {
449 pr_warn("invalid QP alt timeout %d > 31\n",
450 attr->alt_timeout);
451 goto err1;
452 }
453 }
454
455 if (mask & IB_QP_PATH_MTU) {
456 struct rxe_port *port = &rxe->port;
457
458 enum ib_mtu max_mtu = port->attr.max_mtu;
459 enum ib_mtu mtu = attr->path_mtu;
460
461 if (mtu > max_mtu) {
462 pr_debug("invalid mtu (%d) > (%d)\n",
463 ib_mtu_enum_to_int(mtu),
464 ib_mtu_enum_to_int(max_mtu));
465 goto err1;
466 }
467 }
468
469 if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
470 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
471 pr_warn("invalid max_rd_atomic %d > %d\n",
472 attr->max_rd_atomic,
473 rxe->attr.max_qp_rd_atom);
474 goto err1;
475 }
476 }
477
478 if (mask & IB_QP_TIMEOUT) {
479 if (attr->timeout > 31) {
480 pr_warn("invalid QP timeout %d > 31\n",
481 attr->timeout);
482 goto err1;
483 }
484 }
485
486 return 0;
487
488 err1:
489 return -EINVAL;
490 }
491
492 /* move the qp to the reset state */
rxe_qp_reset(struct rxe_qp * qp)493 static void rxe_qp_reset(struct rxe_qp *qp)
494 {
495 /* stop tasks from running */
496 rxe_disable_task(&qp->resp.task);
497
498 /* stop request/comp */
499 if (qp->sq.queue) {
500 if (qp_type(qp) == IB_QPT_RC)
501 rxe_disable_task(&qp->comp.task);
502 rxe_disable_task(&qp->req.task);
503 }
504
505 /* move qp to the reset state */
506 qp->req.state = QP_STATE_RESET;
507 qp->resp.state = QP_STATE_RESET;
508
509 /* let state machines reset themselves drain work and packet queues
510 * etc.
511 */
512 __rxe_do_task(&qp->resp.task);
513
514 if (qp->sq.queue) {
515 __rxe_do_task(&qp->comp.task);
516 __rxe_do_task(&qp->req.task);
517 rxe_queue_reset(qp->sq.queue);
518 }
519
520 /* cleanup attributes */
521 atomic_set(&qp->ssn, 0);
522 qp->req.opcode = -1;
523 qp->req.need_retry = 0;
524 qp->req.noack_pkts = 0;
525 qp->resp.msn = 0;
526 qp->resp.opcode = -1;
527 qp->resp.drop_msg = 0;
528 qp->resp.goto_error = 0;
529 qp->resp.sent_psn_nak = 0;
530
531 if (qp->resp.mr) {
532 rxe_drop_ref(qp->resp.mr);
533 qp->resp.mr = NULL;
534 }
535
536 cleanup_rd_atomic_resources(qp);
537
538 /* reenable tasks */
539 rxe_enable_task(&qp->resp.task);
540
541 if (qp->sq.queue) {
542 if (qp_type(qp) == IB_QPT_RC)
543 rxe_enable_task(&qp->comp.task);
544
545 rxe_enable_task(&qp->req.task);
546 }
547 }
548
549 /* drain the send queue */
rxe_qp_drain(struct rxe_qp * qp)550 static void rxe_qp_drain(struct rxe_qp *qp)
551 {
552 if (qp->sq.queue) {
553 if (qp->req.state != QP_STATE_DRAINED) {
554 qp->req.state = QP_STATE_DRAIN;
555 if (qp_type(qp) == IB_QPT_RC)
556 rxe_run_task(&qp->comp.task, 1);
557 else
558 __rxe_do_task(&qp->comp.task);
559 rxe_run_task(&qp->req.task, 1);
560 }
561 }
562 }
563
564 /* move the qp to the error state */
rxe_qp_error(struct rxe_qp * qp)565 void rxe_qp_error(struct rxe_qp *qp)
566 {
567 qp->req.state = QP_STATE_ERROR;
568 qp->resp.state = QP_STATE_ERROR;
569 qp->attr.qp_state = IB_QPS_ERR;
570
571 /* drain work and packet queues */
572 rxe_run_task(&qp->resp.task, 1);
573
574 if (qp_type(qp) == IB_QPT_RC)
575 rxe_run_task(&qp->comp.task, 1);
576 else
577 __rxe_do_task(&qp->comp.task);
578 rxe_run_task(&qp->req.task, 1);
579 }
580
581 /* 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)582 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
583 struct ib_udata *udata)
584 {
585 int err;
586
587 if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
588 int max_rd_atomic = attr->max_rd_atomic ?
589 roundup_pow_of_two(attr->max_rd_atomic) : 0;
590
591 qp->attr.max_rd_atomic = max_rd_atomic;
592 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
593 }
594
595 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
596 int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
597 roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
598
599 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
600
601 free_rd_atomic_resources(qp);
602
603 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
604 if (err)
605 return err;
606 }
607
608 if (mask & IB_QP_CUR_STATE)
609 qp->attr.cur_qp_state = attr->qp_state;
610
611 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
612 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
613
614 if (mask & IB_QP_ACCESS_FLAGS)
615 qp->attr.qp_access_flags = attr->qp_access_flags;
616
617 if (mask & IB_QP_PKEY_INDEX)
618 qp->attr.pkey_index = attr->pkey_index;
619
620 if (mask & IB_QP_PORT)
621 qp->attr.port_num = attr->port_num;
622
623 if (mask & IB_QP_QKEY)
624 qp->attr.qkey = attr->qkey;
625
626 if (mask & IB_QP_AV)
627 rxe_init_av(&attr->ah_attr, &qp->pri_av);
628
629 if (mask & IB_QP_ALT_PATH) {
630 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av);
631 qp->attr.alt_port_num = attr->alt_port_num;
632 qp->attr.alt_pkey_index = attr->alt_pkey_index;
633 qp->attr.alt_timeout = attr->alt_timeout;
634 }
635
636 if (mask & IB_QP_PATH_MTU) {
637 qp->attr.path_mtu = attr->path_mtu;
638 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
639 }
640
641 if (mask & IB_QP_TIMEOUT) {
642 qp->attr.timeout = attr->timeout;
643 if (attr->timeout == 0) {
644 qp->qp_timeout_jiffies = 0;
645 } else {
646 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
647 int j = nsecs_to_jiffies(4096ULL << attr->timeout);
648
649 qp->qp_timeout_jiffies = j ? j : 1;
650 }
651 }
652
653 if (mask & IB_QP_RETRY_CNT) {
654 qp->attr.retry_cnt = attr->retry_cnt;
655 qp->comp.retry_cnt = attr->retry_cnt;
656 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
657 attr->retry_cnt);
658 }
659
660 if (mask & IB_QP_RNR_RETRY) {
661 qp->attr.rnr_retry = attr->rnr_retry;
662 qp->comp.rnr_retry = attr->rnr_retry;
663 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
664 attr->rnr_retry);
665 }
666
667 if (mask & IB_QP_RQ_PSN) {
668 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
669 qp->resp.psn = qp->attr.rq_psn;
670 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
671 qp->resp.psn);
672 }
673
674 if (mask & IB_QP_MIN_RNR_TIMER) {
675 qp->attr.min_rnr_timer = attr->min_rnr_timer;
676 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
677 attr->min_rnr_timer);
678 }
679
680 if (mask & IB_QP_SQ_PSN) {
681 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
682 qp->req.psn = qp->attr.sq_psn;
683 qp->comp.psn = qp->attr.sq_psn;
684 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
685 }
686
687 if (mask & IB_QP_PATH_MIG_STATE)
688 qp->attr.path_mig_state = attr->path_mig_state;
689
690 if (mask & IB_QP_DEST_QPN)
691 qp->attr.dest_qp_num = attr->dest_qp_num;
692
693 if (mask & IB_QP_STATE) {
694 qp->attr.qp_state = attr->qp_state;
695
696 switch (attr->qp_state) {
697 case IB_QPS_RESET:
698 pr_debug("qp#%d state -> RESET\n", qp_num(qp));
699 rxe_qp_reset(qp);
700 break;
701
702 case IB_QPS_INIT:
703 pr_debug("qp#%d state -> INIT\n", qp_num(qp));
704 qp->req.state = QP_STATE_INIT;
705 qp->resp.state = QP_STATE_INIT;
706 break;
707
708 case IB_QPS_RTR:
709 pr_debug("qp#%d state -> RTR\n", qp_num(qp));
710 qp->resp.state = QP_STATE_READY;
711 break;
712
713 case IB_QPS_RTS:
714 pr_debug("qp#%d state -> RTS\n", qp_num(qp));
715 qp->req.state = QP_STATE_READY;
716 break;
717
718 case IB_QPS_SQD:
719 pr_debug("qp#%d state -> SQD\n", qp_num(qp));
720 rxe_qp_drain(qp);
721 break;
722
723 case IB_QPS_SQE:
724 pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
725 /* Not possible from modify_qp. */
726 break;
727
728 case IB_QPS_ERR:
729 pr_debug("qp#%d state -> ERR\n", qp_num(qp));
730 rxe_qp_error(qp);
731 break;
732 }
733 }
734
735 return 0;
736 }
737
738 /* called by the query qp verb */
rxe_qp_to_attr(struct rxe_qp * qp,struct ib_qp_attr * attr,int mask)739 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
740 {
741 *attr = qp->attr;
742
743 attr->rq_psn = qp->resp.psn;
744 attr->sq_psn = qp->req.psn;
745
746 attr->cap.max_send_wr = qp->sq.max_wr;
747 attr->cap.max_send_sge = qp->sq.max_sge;
748 attr->cap.max_inline_data = qp->sq.max_inline;
749
750 if (!qp->srq) {
751 attr->cap.max_recv_wr = qp->rq.max_wr;
752 attr->cap.max_recv_sge = qp->rq.max_sge;
753 }
754
755 rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
756 rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
757
758 if (qp->req.state == QP_STATE_DRAIN) {
759 attr->sq_draining = 1;
760 /* applications that get this state
761 * typically spin on it. yield the
762 * processor
763 */
764 cond_resched();
765 } else {
766 attr->sq_draining = 0;
767 }
768
769 pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
770
771 return 0;
772 }
773
774 /* called by the destroy qp verb */
rxe_qp_destroy(struct rxe_qp * qp)775 void rxe_qp_destroy(struct rxe_qp *qp)
776 {
777 qp->valid = 0;
778 qp->qp_timeout_jiffies = 0;
779 rxe_cleanup_task(&qp->resp.task);
780
781 if (qp_type(qp) == IB_QPT_RC) {
782 del_timer_sync(&qp->retrans_timer);
783 del_timer_sync(&qp->rnr_nak_timer);
784 }
785
786 rxe_cleanup_task(&qp->req.task);
787 rxe_cleanup_task(&qp->comp.task);
788
789 /* flush out any receive wr's or pending requests */
790 __rxe_do_task(&qp->req.task);
791 if (qp->sq.queue) {
792 __rxe_do_task(&qp->comp.task);
793 __rxe_do_task(&qp->req.task);
794 }
795 }
796
797 /* called when the last reference to the qp is dropped */
rxe_qp_do_cleanup(struct work_struct * work)798 static void rxe_qp_do_cleanup(struct work_struct *work)
799 {
800 struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
801
802 rxe_drop_all_mcast_groups(qp);
803
804 if (qp->sq.queue)
805 rxe_queue_cleanup(qp->sq.queue);
806
807 if (qp->srq)
808 rxe_drop_ref(qp->srq);
809
810 if (qp->rq.queue)
811 rxe_queue_cleanup(qp->rq.queue);
812
813 if (qp->scq)
814 rxe_drop_ref(qp->scq);
815 if (qp->rcq)
816 rxe_drop_ref(qp->rcq);
817 if (qp->pd)
818 rxe_drop_ref(qp->pd);
819
820 if (qp->resp.mr) {
821 rxe_drop_ref(qp->resp.mr);
822 qp->resp.mr = NULL;
823 }
824
825 if (qp_type(qp) == IB_QPT_RC)
826 sk_dst_reset(qp->sk->sk);
827
828 free_rd_atomic_resources(qp);
829
830 kernel_sock_shutdown(qp->sk, SHUT_RDWR);
831 sock_release(qp->sk);
832 }
833
834 /* called when the last reference to the qp is dropped */
rxe_qp_cleanup(struct rxe_pool_entry * arg)835 void rxe_qp_cleanup(struct rxe_pool_entry *arg)
836 {
837 struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem);
838
839 execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
840 }
841