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