2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
4 * Copyright (c) 2004 Intel Corporation. All rights reserved.
5 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.
7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
8 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
10 * This software is available to you under a choice of one of two
11 * licenses. You may choose to be licensed under the terms of the GNU
12 * General Public License (GPL) Version 2, available from the file
13 * COPYING in the main directory of this source tree, or the
14 * OpenIB.org BSD license below:
16 * Redistribution and use in source and binary forms, with or
17 * without modification, are permitted provided that the following
20 * - Redistributions of source code must retain the above
21 * copyright notice, this list of conditions and the following
24 * - Redistributions in binary form must reproduce the above
25 * copyright notice, this list of conditions and the following
26 * disclaimer in the documentation and/or other materials
27 * provided with the distribution.
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
39 #include <linux/errno.h>
40 #include <linux/err.h>
41 #include <linux/string.h>
42 #include <linux/slab.h>
44 #include <rdma/ib_verbs.h>
45 #include <rdma/ib_cache.h>
47 int ib_rate_to_mult(enum ib_rate rate)
50 case IB_RATE_2_5_GBPS: return 1;
51 case IB_RATE_5_GBPS: return 2;
52 case IB_RATE_10_GBPS: return 4;
53 case IB_RATE_20_GBPS: return 8;
54 case IB_RATE_30_GBPS: return 12;
55 case IB_RATE_40_GBPS: return 16;
56 case IB_RATE_60_GBPS: return 24;
57 case IB_RATE_80_GBPS: return 32;
58 case IB_RATE_120_GBPS: return 48;
62 EXPORT_SYMBOL(ib_rate_to_mult);
64 enum ib_rate mult_to_ib_rate(int mult)
67 case 1: return IB_RATE_2_5_GBPS;
68 case 2: return IB_RATE_5_GBPS;
69 case 4: return IB_RATE_10_GBPS;
70 case 8: return IB_RATE_20_GBPS;
71 case 12: return IB_RATE_30_GBPS;
72 case 16: return IB_RATE_40_GBPS;
73 case 24: return IB_RATE_60_GBPS;
74 case 32: return IB_RATE_80_GBPS;
75 case 48: return IB_RATE_120_GBPS;
76 default: return IB_RATE_PORT_CURRENT;
79 EXPORT_SYMBOL(mult_to_ib_rate);
81 int ib_rate_to_mbps(enum ib_rate rate)
84 case IB_RATE_2_5_GBPS: return 2500;
85 case IB_RATE_5_GBPS: return 5000;
86 case IB_RATE_10_GBPS: return 10000;
87 case IB_RATE_20_GBPS: return 20000;
88 case IB_RATE_30_GBPS: return 30000;
89 case IB_RATE_40_GBPS: return 40000;
90 case IB_RATE_60_GBPS: return 60000;
91 case IB_RATE_80_GBPS: return 80000;
92 case IB_RATE_120_GBPS: return 120000;
93 case IB_RATE_14_GBPS: return 14062;
94 case IB_RATE_56_GBPS: return 56250;
95 case IB_RATE_112_GBPS: return 112500;
96 case IB_RATE_168_GBPS: return 168750;
97 case IB_RATE_25_GBPS: return 25781;
98 case IB_RATE_100_GBPS: return 103125;
99 case IB_RATE_200_GBPS: return 206250;
100 case IB_RATE_300_GBPS: return 309375;
104 EXPORT_SYMBOL(ib_rate_to_mbps);
106 enum rdma_transport_type
107 rdma_node_get_transport(enum rdma_node_type node_type)
110 case RDMA_NODE_IB_CA:
111 case RDMA_NODE_IB_SWITCH:
112 case RDMA_NODE_IB_ROUTER:
113 return RDMA_TRANSPORT_IB;
115 return RDMA_TRANSPORT_IWARP;
121 EXPORT_SYMBOL(rdma_node_get_transport);
123 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
125 if (device->get_link_layer)
126 return device->get_link_layer(device, port_num);
128 switch (rdma_node_get_transport(device->node_type)) {
129 case RDMA_TRANSPORT_IB:
130 return IB_LINK_LAYER_INFINIBAND;
131 case RDMA_TRANSPORT_IWARP:
132 return IB_LINK_LAYER_ETHERNET;
134 return IB_LINK_LAYER_UNSPECIFIED;
137 EXPORT_SYMBOL(rdma_port_get_link_layer);
139 /* Protection domains */
141 struct ib_pd *ib_alloc_pd(struct ib_device *device)
145 pd = device->alloc_pd(device, NULL, NULL);
150 atomic_set(&pd->usecnt, 0);
155 EXPORT_SYMBOL(ib_alloc_pd);
157 int ib_dealloc_pd(struct ib_pd *pd)
159 if (atomic_read(&pd->usecnt))
162 return pd->device->dealloc_pd(pd);
164 EXPORT_SYMBOL(ib_dealloc_pd);
166 /* Address handles */
168 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
172 ah = pd->device->create_ah(pd, ah_attr);
175 ah->device = pd->device;
178 atomic_inc(&pd->usecnt);
183 EXPORT_SYMBOL(ib_create_ah);
185 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
186 struct ib_grh *grh, struct ib_ah_attr *ah_attr)
192 memset(ah_attr, 0, sizeof *ah_attr);
193 ah_attr->dlid = wc->slid;
194 ah_attr->sl = wc->sl;
195 ah_attr->src_path_bits = wc->dlid_path_bits;
196 ah_attr->port_num = port_num;
198 if (wc->wc_flags & IB_WC_GRH) {
199 ah_attr->ah_flags = IB_AH_GRH;
200 ah_attr->grh.dgid = grh->sgid;
202 ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
207 ah_attr->grh.sgid_index = (u8) gid_index;
208 flow_class = be32_to_cpu(grh->version_tclass_flow);
209 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
210 ah_attr->grh.hop_limit = 0xFF;
211 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
215 EXPORT_SYMBOL(ib_init_ah_from_wc);
217 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
218 struct ib_grh *grh, u8 port_num)
220 struct ib_ah_attr ah_attr;
223 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
227 return ib_create_ah(pd, &ah_attr);
229 EXPORT_SYMBOL(ib_create_ah_from_wc);
231 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
233 return ah->device->modify_ah ?
234 ah->device->modify_ah(ah, ah_attr) :
237 EXPORT_SYMBOL(ib_modify_ah);
239 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
241 return ah->device->query_ah ?
242 ah->device->query_ah(ah, ah_attr) :
245 EXPORT_SYMBOL(ib_query_ah);
247 int ib_destroy_ah(struct ib_ah *ah)
253 ret = ah->device->destroy_ah(ah);
255 atomic_dec(&pd->usecnt);
259 EXPORT_SYMBOL(ib_destroy_ah);
261 /* Shared receive queues */
263 struct ib_srq *ib_create_srq(struct ib_pd *pd,
264 struct ib_srq_init_attr *srq_init_attr)
268 if (!pd->device->create_srq)
269 return ERR_PTR(-ENOSYS);
271 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
274 srq->device = pd->device;
277 srq->event_handler = srq_init_attr->event_handler;
278 srq->srq_context = srq_init_attr->srq_context;
279 srq->srq_type = srq_init_attr->srq_type;
280 if (srq->srq_type == IB_SRQT_XRC) {
281 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
282 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq;
283 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
284 atomic_inc(&srq->ext.xrc.cq->usecnt);
286 atomic_inc(&pd->usecnt);
287 atomic_set(&srq->usecnt, 0);
292 EXPORT_SYMBOL(ib_create_srq);
294 int ib_modify_srq(struct ib_srq *srq,
295 struct ib_srq_attr *srq_attr,
296 enum ib_srq_attr_mask srq_attr_mask)
298 return srq->device->modify_srq ?
299 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
302 EXPORT_SYMBOL(ib_modify_srq);
304 int ib_query_srq(struct ib_srq *srq,
305 struct ib_srq_attr *srq_attr)
307 return srq->device->query_srq ?
308 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
310 EXPORT_SYMBOL(ib_query_srq);
312 int ib_destroy_srq(struct ib_srq *srq)
315 enum ib_srq_type srq_type;
316 struct ib_xrcd *uninitialized_var(xrcd);
317 struct ib_cq *uninitialized_var(cq);
320 if (atomic_read(&srq->usecnt))
324 srq_type = srq->srq_type;
325 if (srq_type == IB_SRQT_XRC) {
326 xrcd = srq->ext.xrc.xrcd;
327 cq = srq->ext.xrc.cq;
330 ret = srq->device->destroy_srq(srq);
332 atomic_dec(&pd->usecnt);
333 if (srq_type == IB_SRQT_XRC) {
334 atomic_dec(&xrcd->usecnt);
335 atomic_dec(&cq->usecnt);
341 EXPORT_SYMBOL(ib_destroy_srq);
345 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
347 struct ib_qp *qp = context;
349 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
350 event->element.qp->event_handler(event, event->element.qp->qp_context);
353 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
355 mutex_lock(&xrcd->tgt_qp_mutex);
356 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
357 mutex_unlock(&xrcd->tgt_qp_mutex);
360 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
361 void (*event_handler)(struct ib_event *, void *),
367 qp = kzalloc(sizeof *qp, GFP_KERNEL);
369 return ERR_PTR(-ENOMEM);
371 qp->real_qp = real_qp;
372 atomic_inc(&real_qp->usecnt);
373 qp->device = real_qp->device;
374 qp->event_handler = event_handler;
375 qp->qp_context = qp_context;
376 qp->qp_num = real_qp->qp_num;
377 qp->qp_type = real_qp->qp_type;
379 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
380 list_add(&qp->open_list, &real_qp->open_list);
381 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
386 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
387 struct ib_qp_open_attr *qp_open_attr)
389 struct ib_qp *qp, *real_qp;
391 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
392 return ERR_PTR(-EINVAL);
394 qp = ERR_PTR(-EINVAL);
395 mutex_lock(&xrcd->tgt_qp_mutex);
396 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
397 if (real_qp->qp_num == qp_open_attr->qp_num) {
398 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
399 qp_open_attr->qp_context);
403 mutex_unlock(&xrcd->tgt_qp_mutex);
406 EXPORT_SYMBOL(ib_open_qp);
408 struct ib_qp *ib_create_qp(struct ib_pd *pd,
409 struct ib_qp_init_attr *qp_init_attr)
411 struct ib_qp *qp, *real_qp;
412 struct ib_device *device;
414 device = pd ? pd->device : qp_init_attr->xrcd->device;
415 qp = device->create_qp(pd, qp_init_attr, NULL);
421 qp->qp_type = qp_init_attr->qp_type;
423 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
424 qp->event_handler = __ib_shared_qp_event_handler;
427 qp->send_cq = qp->recv_cq = NULL;
429 qp->xrcd = qp_init_attr->xrcd;
430 atomic_inc(&qp_init_attr->xrcd->usecnt);
431 INIT_LIST_HEAD(&qp->open_list);
432 atomic_set(&qp->usecnt, 0);
435 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
436 qp_init_attr->qp_context);
438 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
440 real_qp->device->destroy_qp(real_qp);
442 qp->event_handler = qp_init_attr->event_handler;
443 qp->qp_context = qp_init_attr->qp_context;
444 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
448 qp->recv_cq = qp_init_attr->recv_cq;
449 atomic_inc(&qp_init_attr->recv_cq->usecnt);
450 qp->srq = qp_init_attr->srq;
452 atomic_inc(&qp_init_attr->srq->usecnt);
456 qp->send_cq = qp_init_attr->send_cq;
459 atomic_inc(&pd->usecnt);
460 atomic_inc(&qp_init_attr->send_cq->usecnt);
466 EXPORT_SYMBOL(ib_create_qp);
468 static const struct {
470 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
471 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
472 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
474 [IB_QPS_RESET] = { .valid = 1 },
478 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
481 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
484 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
487 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
490 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
493 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
495 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
501 [IB_QPS_RESET] = { .valid = 1 },
502 [IB_QPS_ERR] = { .valid = 1 },
506 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
509 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
512 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
515 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
518 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
521 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
523 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
530 [IB_QPT_UC] = (IB_QP_AV |
534 [IB_QPT_RC] = (IB_QP_AV |
538 IB_QP_MAX_DEST_RD_ATOMIC |
539 IB_QP_MIN_RNR_TIMER),
540 [IB_QPT_XRC_INI] = (IB_QP_AV |
544 [IB_QPT_XRC_TGT] = (IB_QP_AV |
548 IB_QP_MAX_DEST_RD_ATOMIC |
549 IB_QP_MIN_RNR_TIMER),
552 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
554 [IB_QPT_UC] = (IB_QP_ALT_PATH |
557 [IB_QPT_RC] = (IB_QP_ALT_PATH |
560 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
563 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
566 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
568 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
574 [IB_QPS_RESET] = { .valid = 1 },
575 [IB_QPS_ERR] = { .valid = 1 },
579 [IB_QPT_UD] = IB_QP_SQ_PSN,
580 [IB_QPT_UC] = IB_QP_SQ_PSN,
581 [IB_QPT_RC] = (IB_QP_TIMEOUT |
585 IB_QP_MAX_QP_RD_ATOMIC),
586 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
590 IB_QP_MAX_QP_RD_ATOMIC),
591 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
593 [IB_QPT_SMI] = IB_QP_SQ_PSN,
594 [IB_QPT_GSI] = IB_QP_SQ_PSN,
597 [IB_QPT_UD] = (IB_QP_CUR_STATE |
599 [IB_QPT_UC] = (IB_QP_CUR_STATE |
602 IB_QP_PATH_MIG_STATE),
603 [IB_QPT_RC] = (IB_QP_CUR_STATE |
606 IB_QP_MIN_RNR_TIMER |
607 IB_QP_PATH_MIG_STATE),
608 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
611 IB_QP_PATH_MIG_STATE),
612 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
615 IB_QP_MIN_RNR_TIMER |
616 IB_QP_PATH_MIG_STATE),
617 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
619 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
625 [IB_QPS_RESET] = { .valid = 1 },
626 [IB_QPS_ERR] = { .valid = 1 },
630 [IB_QPT_UD] = (IB_QP_CUR_STATE |
632 [IB_QPT_UC] = (IB_QP_CUR_STATE |
635 IB_QP_PATH_MIG_STATE),
636 [IB_QPT_RC] = (IB_QP_CUR_STATE |
639 IB_QP_PATH_MIG_STATE |
640 IB_QP_MIN_RNR_TIMER),
641 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
644 IB_QP_PATH_MIG_STATE),
645 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
648 IB_QP_PATH_MIG_STATE |
649 IB_QP_MIN_RNR_TIMER),
650 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
652 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
659 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
660 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
661 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
662 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
663 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
664 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
665 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
670 [IB_QPS_RESET] = { .valid = 1 },
671 [IB_QPS_ERR] = { .valid = 1 },
675 [IB_QPT_UD] = (IB_QP_CUR_STATE |
677 [IB_QPT_UC] = (IB_QP_CUR_STATE |
680 IB_QP_PATH_MIG_STATE),
681 [IB_QPT_RC] = (IB_QP_CUR_STATE |
684 IB_QP_MIN_RNR_TIMER |
685 IB_QP_PATH_MIG_STATE),
686 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
689 IB_QP_PATH_MIG_STATE),
690 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
693 IB_QP_MIN_RNR_TIMER |
694 IB_QP_PATH_MIG_STATE),
695 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
697 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
704 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
706 [IB_QPT_UC] = (IB_QP_AV |
710 IB_QP_PATH_MIG_STATE),
711 [IB_QPT_RC] = (IB_QP_PORT |
716 IB_QP_MAX_QP_RD_ATOMIC |
717 IB_QP_MAX_DEST_RD_ATOMIC |
721 IB_QP_MIN_RNR_TIMER |
722 IB_QP_PATH_MIG_STATE),
723 [IB_QPT_XRC_INI] = (IB_QP_PORT |
728 IB_QP_MAX_QP_RD_ATOMIC |
732 IB_QP_PATH_MIG_STATE),
733 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
736 IB_QP_MAX_DEST_RD_ATOMIC |
740 IB_QP_MIN_RNR_TIMER |
741 IB_QP_PATH_MIG_STATE),
742 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
744 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
750 [IB_QPS_RESET] = { .valid = 1 },
751 [IB_QPS_ERR] = { .valid = 1 },
755 [IB_QPT_UD] = (IB_QP_CUR_STATE |
757 [IB_QPT_UC] = (IB_QP_CUR_STATE |
759 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
761 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
767 [IB_QPS_RESET] = { .valid = 1 },
768 [IB_QPS_ERR] = { .valid = 1 }
772 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
773 enum ib_qp_type type, enum ib_qp_attr_mask mask)
775 enum ib_qp_attr_mask req_param, opt_param;
777 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
778 next_state < 0 || next_state > IB_QPS_ERR)
781 if (mask & IB_QP_CUR_STATE &&
782 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
783 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
786 if (!qp_state_table[cur_state][next_state].valid)
789 req_param = qp_state_table[cur_state][next_state].req_param[type];
790 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
792 if ((mask & req_param) != req_param)
795 if (mask & ~(req_param | opt_param | IB_QP_STATE))
800 EXPORT_SYMBOL(ib_modify_qp_is_ok);
802 int ib_modify_qp(struct ib_qp *qp,
803 struct ib_qp_attr *qp_attr,
806 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
808 EXPORT_SYMBOL(ib_modify_qp);
810 int ib_query_qp(struct ib_qp *qp,
811 struct ib_qp_attr *qp_attr,
813 struct ib_qp_init_attr *qp_init_attr)
815 return qp->device->query_qp ?
816 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
819 EXPORT_SYMBOL(ib_query_qp);
821 int ib_close_qp(struct ib_qp *qp)
823 struct ib_qp *real_qp;
826 real_qp = qp->real_qp;
830 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
831 list_del(&qp->open_list);
832 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
834 atomic_dec(&real_qp->usecnt);
839 EXPORT_SYMBOL(ib_close_qp);
841 static int __ib_destroy_shared_qp(struct ib_qp *qp)
843 struct ib_xrcd *xrcd;
844 struct ib_qp *real_qp;
847 real_qp = qp->real_qp;
848 xrcd = real_qp->xrcd;
850 mutex_lock(&xrcd->tgt_qp_mutex);
852 if (atomic_read(&real_qp->usecnt) == 0)
853 list_del(&real_qp->xrcd_list);
856 mutex_unlock(&xrcd->tgt_qp_mutex);
859 ret = ib_destroy_qp(real_qp);
861 atomic_dec(&xrcd->usecnt);
863 __ib_insert_xrcd_qp(xrcd, real_qp);
869 int ib_destroy_qp(struct ib_qp *qp)
872 struct ib_cq *scq, *rcq;
876 if (atomic_read(&qp->usecnt))
879 if (qp->real_qp != qp)
880 return __ib_destroy_shared_qp(qp);
887 ret = qp->device->destroy_qp(qp);
890 atomic_dec(&pd->usecnt);
892 atomic_dec(&scq->usecnt);
894 atomic_dec(&rcq->usecnt);
896 atomic_dec(&srq->usecnt);
901 EXPORT_SYMBOL(ib_destroy_qp);
903 /* Completion queues */
905 struct ib_cq *ib_create_cq(struct ib_device *device,
906 ib_comp_handler comp_handler,
907 void (*event_handler)(struct ib_event *, void *),
908 void *cq_context, int cqe, int comp_vector)
912 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
917 cq->comp_handler = comp_handler;
918 cq->event_handler = event_handler;
919 cq->cq_context = cq_context;
920 atomic_set(&cq->usecnt, 0);
925 EXPORT_SYMBOL(ib_create_cq);
927 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
929 return cq->device->modify_cq ?
930 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
932 EXPORT_SYMBOL(ib_modify_cq);
934 int ib_destroy_cq(struct ib_cq *cq)
936 if (atomic_read(&cq->usecnt))
939 return cq->device->destroy_cq(cq);
941 EXPORT_SYMBOL(ib_destroy_cq);
943 int ib_resize_cq(struct ib_cq *cq, int cqe)
945 return cq->device->resize_cq ?
946 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
948 EXPORT_SYMBOL(ib_resize_cq);
952 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
956 mr = pd->device->get_dma_mr(pd, mr_access_flags);
959 mr->device = pd->device;
962 atomic_inc(&pd->usecnt);
963 atomic_set(&mr->usecnt, 0);
968 EXPORT_SYMBOL(ib_get_dma_mr);
970 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
971 struct ib_phys_buf *phys_buf_array,
978 if (!pd->device->reg_phys_mr)
979 return ERR_PTR(-ENOSYS);
981 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
982 mr_access_flags, iova_start);
985 mr->device = pd->device;
988 atomic_inc(&pd->usecnt);
989 atomic_set(&mr->usecnt, 0);
994 EXPORT_SYMBOL(ib_reg_phys_mr);
996 int ib_rereg_phys_mr(struct ib_mr *mr,
999 struct ib_phys_buf *phys_buf_array,
1001 int mr_access_flags,
1004 struct ib_pd *old_pd;
1007 if (!mr->device->rereg_phys_mr)
1010 if (atomic_read(&mr->usecnt))
1015 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
1016 phys_buf_array, num_phys_buf,
1017 mr_access_flags, iova_start);
1019 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
1020 atomic_dec(&old_pd->usecnt);
1021 atomic_inc(&pd->usecnt);
1026 EXPORT_SYMBOL(ib_rereg_phys_mr);
1028 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
1030 return mr->device->query_mr ?
1031 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
1033 EXPORT_SYMBOL(ib_query_mr);
1035 int ib_dereg_mr(struct ib_mr *mr)
1040 if (atomic_read(&mr->usecnt))
1044 ret = mr->device->dereg_mr(mr);
1046 atomic_dec(&pd->usecnt);
1050 EXPORT_SYMBOL(ib_dereg_mr);
1052 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
1056 if (!pd->device->alloc_fast_reg_mr)
1057 return ERR_PTR(-ENOSYS);
1059 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len);
1062 mr->device = pd->device;
1065 atomic_inc(&pd->usecnt);
1066 atomic_set(&mr->usecnt, 0);
1071 EXPORT_SYMBOL(ib_alloc_fast_reg_mr);
1073 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
1074 int max_page_list_len)
1076 struct ib_fast_reg_page_list *page_list;
1078 if (!device->alloc_fast_reg_page_list)
1079 return ERR_PTR(-ENOSYS);
1081 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
1083 if (!IS_ERR(page_list)) {
1084 page_list->device = device;
1085 page_list->max_page_list_len = max_page_list_len;
1090 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
1092 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
1094 page_list->device->free_fast_reg_page_list(page_list);
1096 EXPORT_SYMBOL(ib_free_fast_reg_page_list);
1098 /* Memory windows */
1100 struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
1104 if (!pd->device->alloc_mw)
1105 return ERR_PTR(-ENOSYS);
1107 mw = pd->device->alloc_mw(pd);
1109 mw->device = pd->device;
1112 atomic_inc(&pd->usecnt);
1117 EXPORT_SYMBOL(ib_alloc_mw);
1119 int ib_dealloc_mw(struct ib_mw *mw)
1125 ret = mw->device->dealloc_mw(mw);
1127 atomic_dec(&pd->usecnt);
1131 EXPORT_SYMBOL(ib_dealloc_mw);
1133 /* "Fast" memory regions */
1135 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1136 int mr_access_flags,
1137 struct ib_fmr_attr *fmr_attr)
1141 if (!pd->device->alloc_fmr)
1142 return ERR_PTR(-ENOSYS);
1144 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1146 fmr->device = pd->device;
1148 atomic_inc(&pd->usecnt);
1153 EXPORT_SYMBOL(ib_alloc_fmr);
1155 int ib_unmap_fmr(struct list_head *fmr_list)
1159 if (list_empty(fmr_list))
1162 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1163 return fmr->device->unmap_fmr(fmr_list);
1165 EXPORT_SYMBOL(ib_unmap_fmr);
1167 int ib_dealloc_fmr(struct ib_fmr *fmr)
1173 ret = fmr->device->dealloc_fmr(fmr);
1175 atomic_dec(&pd->usecnt);
1179 EXPORT_SYMBOL(ib_dealloc_fmr);
1181 /* Multicast groups */
1183 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1185 if (!qp->device->attach_mcast)
1187 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1190 return qp->device->attach_mcast(qp, gid, lid);
1192 EXPORT_SYMBOL(ib_attach_mcast);
1194 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1196 if (!qp->device->detach_mcast)
1198 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1201 return qp->device->detach_mcast(qp, gid, lid);
1203 EXPORT_SYMBOL(ib_detach_mcast);
1205 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1207 struct ib_xrcd *xrcd;
1209 if (!device->alloc_xrcd)
1210 return ERR_PTR(-ENOSYS);
1212 xrcd = device->alloc_xrcd(device, NULL, NULL);
1213 if (!IS_ERR(xrcd)) {
1214 xrcd->device = device;
1216 atomic_set(&xrcd->usecnt, 0);
1217 mutex_init(&xrcd->tgt_qp_mutex);
1218 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1223 EXPORT_SYMBOL(ib_alloc_xrcd);
1225 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1230 if (atomic_read(&xrcd->usecnt))
1233 while (!list_empty(&xrcd->tgt_qp_list)) {
1234 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1235 ret = ib_destroy_qp(qp);
1240 return xrcd->device->dealloc_xrcd(xrcd);
1242 EXPORT_SYMBOL(ib_dealloc_xrcd);