1 /* QLogic qedr NIC Driver
2 * Copyright (c) 2015-2017 QLogic Corporation
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and /or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #include <net/addrconf.h>
36 #include <net/route.h>
37 #include <net/ip6_route.h>
40 #include "qedr_iw_cm.h"
43 qedr_fill_sockaddr4(const struct qed_iwarp_cm_info *cm_info,
44 struct iw_cm_event *event)
46 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
47 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
49 laddr->sin_family = AF_INET;
50 raddr->sin_family = AF_INET;
52 laddr->sin_port = htons(cm_info->local_port);
53 raddr->sin_port = htons(cm_info->remote_port);
55 laddr->sin_addr.s_addr = htonl(cm_info->local_ip[0]);
56 raddr->sin_addr.s_addr = htonl(cm_info->remote_ip[0]);
60 qedr_fill_sockaddr6(const struct qed_iwarp_cm_info *cm_info,
61 struct iw_cm_event *event)
63 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
64 struct sockaddr_in6 *raddr6 =
65 (struct sockaddr_in6 *)&event->remote_addr;
68 laddr6->sin6_family = AF_INET6;
69 raddr6->sin6_family = AF_INET6;
71 laddr6->sin6_port = htons(cm_info->local_port);
72 raddr6->sin6_port = htons(cm_info->remote_port);
74 for (i = 0; i < 4; i++) {
75 laddr6->sin6_addr.in6_u.u6_addr32[i] =
76 htonl(cm_info->local_ip[i]);
77 raddr6->sin6_addr.in6_u.u6_addr32[i] =
78 htonl(cm_info->remote_ip[i]);
83 qedr_iw_mpa_request(void *context, struct qed_iwarp_cm_event_params *params)
85 struct qedr_iw_listener *listener = (struct qedr_iw_listener *)context;
86 struct qedr_dev *dev = listener->dev;
87 struct iw_cm_event event;
88 struct qedr_iw_ep *ep;
90 ep = kzalloc(sizeof(*ep), GFP_ATOMIC);
95 ep->qed_context = params->ep_context;
97 memset(&event, 0, sizeof(event));
98 event.event = IW_CM_EVENT_CONNECT_REQUEST;
99 event.status = params->status;
101 if (!IS_ENABLED(CONFIG_IPV6) ||
102 params->cm_info->ip_version == QED_TCP_IPV4)
103 qedr_fill_sockaddr4(params->cm_info, &event);
105 qedr_fill_sockaddr6(params->cm_info, &event);
107 event.provider_data = (void *)ep;
108 event.private_data = (void *)params->cm_info->private_data;
109 event.private_data_len = (u8)params->cm_info->private_data_len;
110 event.ord = params->cm_info->ord;
111 event.ird = params->cm_info->ird;
113 listener->cm_id->event_handler(listener->cm_id, &event);
117 qedr_iw_issue_event(void *context,
118 struct qed_iwarp_cm_event_params *params,
119 enum iw_cm_event_type event_type)
121 struct qedr_iw_ep *ep = (struct qedr_iw_ep *)context;
122 struct iw_cm_event event;
124 memset(&event, 0, sizeof(event));
125 event.status = params->status;
126 event.event = event_type;
128 if (params->cm_info) {
129 event.ird = params->cm_info->ird;
130 event.ord = params->cm_info->ord;
131 event.private_data_len = params->cm_info->private_data_len;
132 event.private_data = (void *)params->cm_info->private_data;
136 ep->cm_id->event_handler(ep->cm_id, &event);
140 qedr_iw_close_event(void *context, struct qed_iwarp_cm_event_params *params)
142 struct qedr_iw_ep *ep = (struct qedr_iw_ep *)context;
145 qedr_iw_issue_event(context, params, IW_CM_EVENT_CLOSE);
147 ep->cm_id->rem_ref(ep->cm_id);
153 qedr_iw_qp_event(void *context,
154 struct qed_iwarp_cm_event_params *params,
155 enum ib_event_type ib_event, char *str)
157 struct qedr_iw_ep *ep = (struct qedr_iw_ep *)context;
158 struct qedr_dev *dev = ep->dev;
159 struct ib_qp *ibqp = &ep->qp->ibqp;
160 struct ib_event event;
162 DP_NOTICE(dev, "QP error received: %s\n", str);
164 if (ibqp->event_handler) {
165 event.event = ib_event;
166 event.device = ibqp->device;
167 event.element.qp = ibqp;
168 ibqp->event_handler(&event, ibqp->qp_context);
172 struct qedr_discon_work {
173 struct work_struct work;
174 struct qedr_iw_ep *ep;
175 enum qed_iwarp_event_type event;
179 static void qedr_iw_disconnect_worker(struct work_struct *work)
181 struct qedr_discon_work *dwork =
182 container_of(work, struct qedr_discon_work, work);
183 struct qed_rdma_modify_qp_in_params qp_params = { 0 };
184 struct qedr_iw_ep *ep = dwork->ep;
185 struct qedr_dev *dev = ep->dev;
186 struct qedr_qp *qp = ep->qp;
187 struct iw_cm_event event;
191 qedr_iw_qp_rem_ref(&qp->ibqp);
195 memset(&event, 0, sizeof(event));
196 event.status = dwork->status;
197 event.event = IW_CM_EVENT_DISCONNECT;
199 /* Success means graceful disconnect was requested. modifying
200 * to SQD is translated to graceful disconnect. O/w reset is sent
203 qp_params.new_state = QED_ROCE_QP_STATE_ERR;
205 qp_params.new_state = QED_ROCE_QP_STATE_SQD;
210 ep->cm_id->event_handler(ep->cm_id, &event);
212 SET_FIELD(qp_params.modify_flags,
213 QED_RDMA_MODIFY_QP_VALID_NEW_STATE, 1);
215 dev->ops->rdma_modify_qp(dev->rdma_ctx, qp->qed_qp, &qp_params);
217 qedr_iw_qp_rem_ref(&qp->ibqp);
221 qedr_iw_disconnect_event(void *context,
222 struct qed_iwarp_cm_event_params *params)
224 struct qedr_discon_work *work;
225 struct qedr_iw_ep *ep = (struct qedr_iw_ep *)context;
226 struct qedr_dev *dev = ep->dev;
227 struct qedr_qp *qp = ep->qp;
229 work = kzalloc(sizeof(*work), GFP_ATOMIC);
233 qedr_iw_qp_add_ref(&qp->ibqp);
235 work->event = params->event;
236 work->status = params->status;
238 INIT_WORK(&work->work, qedr_iw_disconnect_worker);
239 queue_work(dev->iwarp_wq, &work->work);
243 qedr_iw_passive_complete(void *context,
244 struct qed_iwarp_cm_event_params *params)
246 struct qedr_iw_ep *ep = (struct qedr_iw_ep *)context;
247 struct qedr_dev *dev = ep->dev;
249 /* We will only reach the following state if MPA_REJECT was called on
250 * passive. In this case there will be no associated QP.
252 if ((params->status == -ECONNREFUSED) && (!ep->qp)) {
253 DP_DEBUG(dev, QEDR_MSG_IWARP,
254 "PASSIVE connection refused releasing ep...\n");
259 qedr_iw_issue_event(context, params, IW_CM_EVENT_ESTABLISHED);
261 if (params->status < 0)
262 qedr_iw_close_event(context, params);
266 qedr_iw_mpa_reply(void *context, struct qed_iwarp_cm_event_params *params)
268 struct qedr_iw_ep *ep = (struct qedr_iw_ep *)context;
269 struct qedr_dev *dev = ep->dev;
270 struct qed_iwarp_send_rtr_in rtr_in;
272 rtr_in.ep_context = params->ep_context;
274 return dev->ops->iwarp_send_rtr(dev->rdma_ctx, &rtr_in);
278 qedr_iw_event_handler(void *context, struct qed_iwarp_cm_event_params *params)
280 struct qedr_iw_ep *ep = (struct qedr_iw_ep *)context;
281 struct qedr_dev *dev = ep->dev;
283 switch (params->event) {
284 case QED_IWARP_EVENT_MPA_REQUEST:
285 qedr_iw_mpa_request(context, params);
287 case QED_IWARP_EVENT_ACTIVE_MPA_REPLY:
288 qedr_iw_mpa_reply(context, params);
290 case QED_IWARP_EVENT_PASSIVE_COMPLETE:
291 ep->during_connect = 0;
292 qedr_iw_passive_complete(context, params);
295 case QED_IWARP_EVENT_ACTIVE_COMPLETE:
296 ep->during_connect = 0;
297 qedr_iw_issue_event(context,
299 IW_CM_EVENT_CONNECT_REPLY);
300 if (params->status < 0) {
301 struct qedr_iw_ep *ep = (struct qedr_iw_ep *)context;
303 ep->cm_id->rem_ref(ep->cm_id);
307 case QED_IWARP_EVENT_DISCONNECT:
308 qedr_iw_disconnect_event(context, params);
310 case QED_IWARP_EVENT_CLOSE:
311 ep->during_connect = 0;
312 qedr_iw_close_event(context, params);
314 case QED_IWARP_EVENT_RQ_EMPTY:
315 qedr_iw_qp_event(context, params, IB_EVENT_QP_FATAL,
316 "QED_IWARP_EVENT_RQ_EMPTY");
318 case QED_IWARP_EVENT_IRQ_FULL:
319 qedr_iw_qp_event(context, params, IB_EVENT_QP_FATAL,
320 "QED_IWARP_EVENT_IRQ_FULL");
322 case QED_IWARP_EVENT_LLP_TIMEOUT:
323 qedr_iw_qp_event(context, params, IB_EVENT_QP_FATAL,
324 "QED_IWARP_EVENT_LLP_TIMEOUT");
326 case QED_IWARP_EVENT_REMOTE_PROTECTION_ERROR:
327 qedr_iw_qp_event(context, params, IB_EVENT_QP_ACCESS_ERR,
328 "QED_IWARP_EVENT_REMOTE_PROTECTION_ERROR");
330 case QED_IWARP_EVENT_CQ_OVERFLOW:
331 qedr_iw_qp_event(context, params, IB_EVENT_QP_FATAL,
332 "QED_IWARP_EVENT_CQ_OVERFLOW");
334 case QED_IWARP_EVENT_QP_CATASTROPHIC:
335 qedr_iw_qp_event(context, params, IB_EVENT_QP_FATAL,
336 "QED_IWARP_EVENT_QP_CATASTROPHIC");
338 case QED_IWARP_EVENT_LOCAL_ACCESS_ERROR:
339 qedr_iw_qp_event(context, params, IB_EVENT_QP_ACCESS_ERR,
340 "QED_IWARP_EVENT_LOCAL_ACCESS_ERROR");
342 case QED_IWARP_EVENT_REMOTE_OPERATION_ERROR:
343 qedr_iw_qp_event(context, params, IB_EVENT_QP_FATAL,
344 "QED_IWARP_EVENT_REMOTE_OPERATION_ERROR");
346 case QED_IWARP_EVENT_TERMINATE_RECEIVED:
347 DP_NOTICE(dev, "Got terminate message\n");
350 DP_NOTICE(dev, "Unknown event received %d\n", params->event);
356 static u16 qedr_iw_get_vlan_ipv4(struct qedr_dev *dev, u32 *addr)
358 struct net_device *ndev;
361 ndev = ip_dev_find(&init_net, htonl(addr[0]));
364 vlan_id = rdma_vlan_dev_vlan_id(ndev);
367 if (vlan_id == 0xffff)
372 static u16 qedr_iw_get_vlan_ipv6(u32 *addr)
374 struct net_device *ndev = NULL;
375 struct in6_addr laddr6;
379 if (!IS_ENABLED(CONFIG_IPV6))
382 for (i = 0; i < 4; i++)
383 laddr6.in6_u.u6_addr32[i] = htonl(addr[i]);
386 for_each_netdev_rcu(&init_net, ndev) {
387 if (ipv6_chk_addr(&init_net, &laddr6, ndev, 1)) {
388 vlan_id = rdma_vlan_dev_vlan_id(ndev);
394 if (vlan_id == 0xffff)
401 qedr_addr4_resolve(struct qedr_dev *dev,
402 struct sockaddr_in *src_in,
403 struct sockaddr_in *dst_in, u8 *dst_mac)
405 __be32 src_ip = src_in->sin_addr.s_addr;
406 __be32 dst_ip = dst_in->sin_addr.s_addr;
407 struct neighbour *neigh = NULL;
408 struct rtable *rt = NULL;
411 rt = ip_route_output(&init_net, dst_ip, src_ip, 0, 0);
413 DP_ERR(dev, "ip_route_output returned error\n");
417 neigh = dst_neigh_lookup(&rt->dst, &dst_ip);
421 if (neigh->nud_state & NUD_VALID) {
422 ether_addr_copy(dst_mac, neigh->ha);
423 DP_DEBUG(dev, QEDR_MSG_QP, "mac_addr=[%pM]\n", dst_mac);
425 neigh_event_send(neigh, NULL);
428 neigh_release(neigh);
437 qedr_addr6_resolve(struct qedr_dev *dev,
438 struct sockaddr_in6 *src_in,
439 struct sockaddr_in6 *dst_in, u8 *dst_mac)
441 struct neighbour *neigh = NULL;
442 struct dst_entry *dst;
446 memset(&fl6, 0, sizeof(fl6));
447 fl6.daddr = dst_in->sin6_addr;
448 fl6.saddr = src_in->sin6_addr;
450 dst = ip6_route_output(&init_net, NULL, &fl6);
452 if ((!dst) || dst->error) {
456 "ip6_route_output returned dst->error = %d\n",
461 neigh = dst_neigh_lookup(dst, &fl6.daddr);
464 if (neigh->nud_state & NUD_VALID) {
465 ether_addr_copy(dst_mac, neigh->ha);
466 DP_DEBUG(dev, QEDR_MSG_QP, "mac_addr=[%pM]\n", dst_mac);
468 neigh_event_send(neigh, NULL);
471 neigh_release(neigh);
479 int qedr_iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
481 struct qedr_dev *dev = get_qedr_dev(cm_id->device);
482 struct qed_iwarp_connect_out out_params;
483 struct qed_iwarp_connect_in in_params;
484 struct qed_iwarp_cm_info *cm_info;
485 struct sockaddr_in6 *laddr6;
486 struct sockaddr_in6 *raddr6;
487 struct sockaddr_in *laddr;
488 struct sockaddr_in *raddr;
489 struct qedr_iw_ep *ep;
494 qp = idr_find(&dev->qpidr.idr, conn_param->qpn);
498 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
499 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
500 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
501 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
503 DP_DEBUG(dev, QEDR_MSG_IWARP, "MAPPED %d %d\n",
504 ntohs(((struct sockaddr_in *)&cm_id->remote_addr)->sin_port),
505 ntohs(raddr->sin_port));
507 DP_DEBUG(dev, QEDR_MSG_IWARP,
508 "Connect source address: %pISpc, remote address: %pISpc\n",
509 &cm_id->local_addr, &cm_id->remote_addr);
511 if (!laddr->sin_port || !raddr->sin_port)
514 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
521 cm_id->add_ref(cm_id);
524 in_params.event_cb = qedr_iw_event_handler;
525 in_params.cb_context = ep;
527 cm_info = &in_params.cm_info;
528 memset(cm_info->local_ip, 0, sizeof(cm_info->local_ip));
529 memset(cm_info->remote_ip, 0, sizeof(cm_info->remote_ip));
531 if (!IS_ENABLED(CONFIG_IPV6) ||
532 cm_id->remote_addr.ss_family == AF_INET) {
533 cm_info->ip_version = QED_TCP_IPV4;
535 cm_info->remote_ip[0] = ntohl(raddr->sin_addr.s_addr);
536 cm_info->local_ip[0] = ntohl(laddr->sin_addr.s_addr);
537 cm_info->remote_port = ntohs(raddr->sin_port);
538 cm_info->local_port = ntohs(laddr->sin_port);
539 cm_info->vlan = qedr_iw_get_vlan_ipv4(dev, cm_info->local_ip);
541 rc = qedr_addr4_resolve(dev, laddr, raddr,
542 (u8 *)in_params.remote_mac_addr);
544 in_params.mss = dev->iwarp_max_mtu -
545 (sizeof(struct iphdr) + sizeof(struct tcphdr));
548 in_params.cm_info.ip_version = QED_TCP_IPV6;
550 for (i = 0; i < 4; i++) {
551 cm_info->remote_ip[i] =
552 ntohl(raddr6->sin6_addr.in6_u.u6_addr32[i]);
553 cm_info->local_ip[i] =
554 ntohl(laddr6->sin6_addr.in6_u.u6_addr32[i]);
557 cm_info->local_port = ntohs(laddr6->sin6_port);
558 cm_info->remote_port = ntohs(raddr6->sin6_port);
560 in_params.mss = dev->iwarp_max_mtu -
561 (sizeof(struct ipv6hdr) + sizeof(struct tcphdr));
563 cm_info->vlan = qedr_iw_get_vlan_ipv6(cm_info->local_ip);
565 rc = qedr_addr6_resolve(dev, laddr6, raddr6,
566 (u8 *)in_params.remote_mac_addr);
571 DP_DEBUG(dev, QEDR_MSG_IWARP,
572 "ord = %d ird=%d private_data=%p private_data_len=%d rq_psn=%d\n",
573 conn_param->ord, conn_param->ird, conn_param->private_data,
574 conn_param->private_data_len, qp->rq_psn);
576 cm_info->ord = conn_param->ord;
577 cm_info->ird = conn_param->ird;
578 cm_info->private_data = conn_param->private_data;
579 cm_info->private_data_len = conn_param->private_data_len;
580 in_params.qp = qp->qed_qp;
581 memcpy(in_params.local_mac_addr, dev->ndev->dev_addr, ETH_ALEN);
583 ep->during_connect = 1;
584 rc = dev->ops->iwarp_connect(dev->rdma_ctx, &in_params, &out_params);
591 cm_id->rem_ref(cm_id);
596 int qedr_iw_create_listen(struct iw_cm_id *cm_id, int backlog)
598 struct qedr_dev *dev = get_qedr_dev(cm_id->device);
599 struct qedr_iw_listener *listener;
600 struct qed_iwarp_listen_in iparams;
601 struct qed_iwarp_listen_out oparams;
602 struct sockaddr_in *laddr;
603 struct sockaddr_in6 *laddr6;
607 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
608 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
610 DP_DEBUG(dev, QEDR_MSG_IWARP,
611 "Create Listener address: %pISpc\n", &cm_id->local_addr);
613 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
618 cm_id->add_ref(cm_id);
619 listener->cm_id = cm_id;
620 listener->backlog = backlog;
622 iparams.cb_context = listener;
623 iparams.event_cb = qedr_iw_event_handler;
624 iparams.max_backlog = backlog;
626 if (!IS_ENABLED(CONFIG_IPV6) ||
627 cm_id->local_addr.ss_family == AF_INET) {
628 iparams.ip_version = QED_TCP_IPV4;
629 memset(iparams.ip_addr, 0, sizeof(iparams.ip_addr));
631 iparams.ip_addr[0] = ntohl(laddr->sin_addr.s_addr);
632 iparams.port = ntohs(laddr->sin_port);
633 iparams.vlan = qedr_iw_get_vlan_ipv4(dev, iparams.ip_addr);
635 iparams.ip_version = QED_TCP_IPV6;
637 for (i = 0; i < 4; i++) {
639 ntohl(laddr6->sin6_addr.in6_u.u6_addr32[i]);
642 iparams.port = ntohs(laddr6->sin6_port);
644 iparams.vlan = qedr_iw_get_vlan_ipv6(iparams.ip_addr);
646 rc = dev->ops->iwarp_create_listen(dev->rdma_ctx, &iparams, &oparams);
650 listener->qed_handle = oparams.handle;
651 cm_id->provider_data = listener;
655 cm_id->rem_ref(cm_id);
660 int qedr_iw_destroy_listen(struct iw_cm_id *cm_id)
662 struct qedr_iw_listener *listener = cm_id->provider_data;
663 struct qedr_dev *dev = get_qedr_dev(cm_id->device);
666 if (listener->qed_handle)
667 rc = dev->ops->iwarp_destroy_listen(dev->rdma_ctx,
668 listener->qed_handle);
670 cm_id->rem_ref(cm_id);
674 int qedr_iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
676 struct qedr_iw_ep *ep = (struct qedr_iw_ep *)cm_id->provider_data;
677 struct qedr_dev *dev = ep->dev;
679 struct qed_iwarp_accept_in params;
682 DP_DEBUG(dev, QEDR_MSG_IWARP, "Accept on qpid=%d\n", conn_param->qpn);
684 qp = idr_find(&dev->qpidr.idr, conn_param->qpn);
686 DP_ERR(dev, "Invalid QP number %d\n", conn_param->qpn);
692 cm_id->add_ref(cm_id);
695 params.ep_context = ep->qed_context;
696 params.cb_context = ep;
697 params.qp = ep->qp->qed_qp;
698 params.private_data = conn_param->private_data;
699 params.private_data_len = conn_param->private_data_len;
700 params.ird = conn_param->ird;
701 params.ord = conn_param->ord;
703 ep->during_connect = 1;
704 rc = dev->ops->iwarp_accept(dev->rdma_ctx, ¶ms);
710 ep->during_connect = 0;
711 cm_id->rem_ref(cm_id);
715 int qedr_iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
717 struct qedr_iw_ep *ep = (struct qedr_iw_ep *)cm_id->provider_data;
718 struct qedr_dev *dev = ep->dev;
719 struct qed_iwarp_reject_in params;
721 params.ep_context = ep->qed_context;
722 params.cb_context = ep;
723 params.private_data = pdata;
724 params.private_data_len = pdata_len;
727 return dev->ops->iwarp_reject(dev->rdma_ctx, ¶ms);
730 void qedr_iw_qp_add_ref(struct ib_qp *ibqp)
732 struct qedr_qp *qp = get_qedr_qp(ibqp);
734 atomic_inc(&qp->refcnt);
737 void qedr_iw_qp_rem_ref(struct ib_qp *ibqp)
739 struct qedr_qp *qp = get_qedr_qp(ibqp);
741 if (atomic_dec_and_test(&qp->refcnt)) {
742 spin_lock_irq(&qp->dev->qpidr.idr_lock);
743 idr_remove(&qp->dev->qpidr.idr, qp->qp_id);
744 spin_unlock_irq(&qp->dev->qpidr.idr_lock);
749 struct ib_qp *qedr_iw_get_qp(struct ib_device *ibdev, int qpn)
751 struct qedr_dev *dev = get_qedr_dev(ibdev);
753 return idr_find(&dev->qpidr.idr, qpn);