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/export.h>
42 #include <linux/string.h>
43 #include <linux/slab.h>
45 #include <linux/in6.h>
46 #include <net/addrconf.h>
48 #include <rdma/ib_verbs.h>
49 #include <rdma/ib_cache.h>
50 #include <rdma/ib_addr.h>
53 #include "core_priv.h"
55 static const char * const ib_events[] = {
56 [IB_EVENT_CQ_ERR] = "CQ error",
57 [IB_EVENT_QP_FATAL] = "QP fatal error",
58 [IB_EVENT_QP_REQ_ERR] = "QP request error",
59 [IB_EVENT_QP_ACCESS_ERR] = "QP access error",
60 [IB_EVENT_COMM_EST] = "communication established",
61 [IB_EVENT_SQ_DRAINED] = "send queue drained",
62 [IB_EVENT_PATH_MIG] = "path migration successful",
63 [IB_EVENT_PATH_MIG_ERR] = "path migration error",
64 [IB_EVENT_DEVICE_FATAL] = "device fatal error",
65 [IB_EVENT_PORT_ACTIVE] = "port active",
66 [IB_EVENT_PORT_ERR] = "port error",
67 [IB_EVENT_LID_CHANGE] = "LID change",
68 [IB_EVENT_PKEY_CHANGE] = "P_key change",
69 [IB_EVENT_SM_CHANGE] = "SM change",
70 [IB_EVENT_SRQ_ERR] = "SRQ error",
71 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",
72 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",
73 [IB_EVENT_CLIENT_REREGISTER] = "client reregister",
74 [IB_EVENT_GID_CHANGE] = "GID changed",
77 const char *__attribute_const__ ib_event_msg(enum ib_event_type event)
81 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
82 ib_events[index] : "unrecognized event";
84 EXPORT_SYMBOL(ib_event_msg);
86 static const char * const wc_statuses[] = {
87 [IB_WC_SUCCESS] = "success",
88 [IB_WC_LOC_LEN_ERR] = "local length error",
89 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error",
90 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",
91 [IB_WC_LOC_PROT_ERR] = "local protection error",
92 [IB_WC_WR_FLUSH_ERR] = "WR flushed",
93 [IB_WC_MW_BIND_ERR] = "memory management operation error",
94 [IB_WC_BAD_RESP_ERR] = "bad response error",
95 [IB_WC_LOC_ACCESS_ERR] = "local access error",
96 [IB_WC_REM_INV_REQ_ERR] = "invalid request error",
97 [IB_WC_REM_ACCESS_ERR] = "remote access error",
98 [IB_WC_REM_OP_ERR] = "remote operation error",
99 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",
100 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",
101 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",
102 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",
103 [IB_WC_REM_ABORT_ERR] = "operation aborted",
104 [IB_WC_INV_EECN_ERR] = "invalid EE context number",
105 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",
106 [IB_WC_FATAL_ERR] = "fatal error",
107 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",
108 [IB_WC_GENERAL_ERR] = "general error",
111 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status)
113 size_t index = status;
115 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
116 wc_statuses[index] : "unrecognized status";
118 EXPORT_SYMBOL(ib_wc_status_msg);
120 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
123 case IB_RATE_2_5_GBPS: return 1;
124 case IB_RATE_5_GBPS: return 2;
125 case IB_RATE_10_GBPS: return 4;
126 case IB_RATE_20_GBPS: return 8;
127 case IB_RATE_30_GBPS: return 12;
128 case IB_RATE_40_GBPS: return 16;
129 case IB_RATE_60_GBPS: return 24;
130 case IB_RATE_80_GBPS: return 32;
131 case IB_RATE_120_GBPS: return 48;
135 EXPORT_SYMBOL(ib_rate_to_mult);
137 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
140 case 1: return IB_RATE_2_5_GBPS;
141 case 2: return IB_RATE_5_GBPS;
142 case 4: return IB_RATE_10_GBPS;
143 case 8: return IB_RATE_20_GBPS;
144 case 12: return IB_RATE_30_GBPS;
145 case 16: return IB_RATE_40_GBPS;
146 case 24: return IB_RATE_60_GBPS;
147 case 32: return IB_RATE_80_GBPS;
148 case 48: return IB_RATE_120_GBPS;
149 default: return IB_RATE_PORT_CURRENT;
152 EXPORT_SYMBOL(mult_to_ib_rate);
154 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
157 case IB_RATE_2_5_GBPS: return 2500;
158 case IB_RATE_5_GBPS: return 5000;
159 case IB_RATE_10_GBPS: return 10000;
160 case IB_RATE_20_GBPS: return 20000;
161 case IB_RATE_30_GBPS: return 30000;
162 case IB_RATE_40_GBPS: return 40000;
163 case IB_RATE_60_GBPS: return 60000;
164 case IB_RATE_80_GBPS: return 80000;
165 case IB_RATE_120_GBPS: return 120000;
166 case IB_RATE_14_GBPS: return 14062;
167 case IB_RATE_56_GBPS: return 56250;
168 case IB_RATE_112_GBPS: return 112500;
169 case IB_RATE_168_GBPS: return 168750;
170 case IB_RATE_25_GBPS: return 25781;
171 case IB_RATE_100_GBPS: return 103125;
172 case IB_RATE_200_GBPS: return 206250;
173 case IB_RATE_300_GBPS: return 309375;
177 EXPORT_SYMBOL(ib_rate_to_mbps);
179 __attribute_const__ enum rdma_transport_type
180 rdma_node_get_transport(enum rdma_node_type node_type)
183 case RDMA_NODE_IB_CA:
184 case RDMA_NODE_IB_SWITCH:
185 case RDMA_NODE_IB_ROUTER:
186 return RDMA_TRANSPORT_IB;
188 return RDMA_TRANSPORT_IWARP;
189 case RDMA_NODE_USNIC:
190 return RDMA_TRANSPORT_USNIC;
191 case RDMA_NODE_USNIC_UDP:
192 return RDMA_TRANSPORT_USNIC_UDP;
198 EXPORT_SYMBOL(rdma_node_get_transport);
200 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
202 if (device->get_link_layer)
203 return device->get_link_layer(device, port_num);
205 switch (rdma_node_get_transport(device->node_type)) {
206 case RDMA_TRANSPORT_IB:
207 return IB_LINK_LAYER_INFINIBAND;
208 case RDMA_TRANSPORT_IWARP:
209 case RDMA_TRANSPORT_USNIC:
210 case RDMA_TRANSPORT_USNIC_UDP:
211 return IB_LINK_LAYER_ETHERNET;
213 return IB_LINK_LAYER_UNSPECIFIED;
216 EXPORT_SYMBOL(rdma_port_get_link_layer);
218 /* Protection domains */
221 * ib_alloc_pd - Allocates an unused protection domain.
222 * @device: The device on which to allocate the protection domain.
224 * A protection domain object provides an association between QPs, shared
225 * receive queues, address handles, memory regions, and memory windows.
227 * Every PD has a local_dma_lkey which can be used as the lkey value for local
230 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
234 int mr_access_flags = 0;
236 pd = device->alloc_pd(device, NULL, NULL);
242 pd->__internal_mr = NULL;
243 atomic_set(&pd->usecnt, 0);
246 if (device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)
247 pd->local_dma_lkey = device->local_dma_lkey;
249 mr_access_flags |= IB_ACCESS_LOCAL_WRITE;
251 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) {
252 pr_warn("%s: enabling unsafe global rkey\n", caller);
253 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE;
256 if (mr_access_flags) {
259 mr = pd->device->get_dma_mr(pd, mr_access_flags);
265 mr->device = pd->device;
268 mr->need_inval = false;
270 pd->__internal_mr = mr;
272 if (!(device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY))
273 pd->local_dma_lkey = pd->__internal_mr->lkey;
275 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY)
276 pd->unsafe_global_rkey = pd->__internal_mr->rkey;
281 EXPORT_SYMBOL(__ib_alloc_pd);
284 * ib_dealloc_pd - Deallocates a protection domain.
285 * @pd: The protection domain to deallocate.
287 * It is an error to call this function while any resources in the pd still
288 * exist. The caller is responsible to synchronously destroy them and
289 * guarantee no new allocations will happen.
291 void ib_dealloc_pd(struct ib_pd *pd)
295 if (pd->__internal_mr) {
296 ret = pd->device->dereg_mr(pd->__internal_mr);
298 pd->__internal_mr = NULL;
301 /* uverbs manipulates usecnt with proper locking, while the kabi
302 requires the caller to guarantee we can't race here. */
303 WARN_ON(atomic_read(&pd->usecnt));
305 /* Making delalloc_pd a void return is a WIP, no driver should return
307 ret = pd->device->dealloc_pd(pd);
308 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
310 EXPORT_SYMBOL(ib_dealloc_pd);
312 /* Address handles */
314 struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr)
318 ah = pd->device->create_ah(pd, ah_attr, NULL);
321 ah->device = pd->device;
324 ah->type = ah_attr->type;
325 atomic_inc(&pd->usecnt);
330 EXPORT_SYMBOL(rdma_create_ah);
332 int ib_get_rdma_header_version(const union rdma_network_hdr *hdr)
334 const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh;
335 struct iphdr ip4h_checked;
336 const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh;
338 /* If it's IPv6, the version must be 6, otherwise, the first
339 * 20 bytes (before the IPv4 header) are garbled.
341 if (ip6h->version != 6)
342 return (ip4h->version == 4) ? 4 : 0;
343 /* version may be 6 or 4 because the first 20 bytes could be garbled */
345 /* RoCE v2 requires no options, thus header length
352 * We can't write on scattered buffers so we need to copy to
355 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked));
356 ip4h_checked.check = 0;
357 ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5);
358 /* if IPv4 header checksum is OK, believe it */
359 if (ip4h->check == ip4h_checked.check)
363 EXPORT_SYMBOL(ib_get_rdma_header_version);
365 static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device,
367 const struct ib_grh *grh)
371 if (rdma_protocol_ib(device, port_num))
372 return RDMA_NETWORK_IB;
374 grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh);
376 if (grh_version == 4)
377 return RDMA_NETWORK_IPV4;
379 if (grh->next_hdr == IPPROTO_UDP)
380 return RDMA_NETWORK_IPV6;
382 return RDMA_NETWORK_ROCE_V1;
385 struct find_gid_index_context {
387 enum ib_gid_type gid_type;
390 static bool find_gid_index(const union ib_gid *gid,
391 const struct ib_gid_attr *gid_attr,
394 struct find_gid_index_context *ctx =
395 (struct find_gid_index_context *)context;
397 if (ctx->gid_type != gid_attr->gid_type)
400 if ((!!(ctx->vlan_id != 0xffff) == !is_vlan_dev(gid_attr->ndev)) ||
401 (is_vlan_dev(gid_attr->ndev) &&
402 vlan_dev_vlan_id(gid_attr->ndev) != ctx->vlan_id))
408 static int get_sgid_index_from_eth(struct ib_device *device, u8 port_num,
409 u16 vlan_id, const union ib_gid *sgid,
410 enum ib_gid_type gid_type,
413 struct find_gid_index_context context = {.vlan_id = vlan_id,
414 .gid_type = gid_type};
416 return ib_find_gid_by_filter(device, sgid, port_num, find_gid_index,
417 &context, gid_index);
420 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr,
421 enum rdma_network_type net_type,
422 union ib_gid *sgid, union ib_gid *dgid)
424 struct sockaddr_in src_in;
425 struct sockaddr_in dst_in;
426 __be32 src_saddr, dst_saddr;
431 if (net_type == RDMA_NETWORK_IPV4) {
432 memcpy(&src_in.sin_addr.s_addr,
433 &hdr->roce4grh.saddr, 4);
434 memcpy(&dst_in.sin_addr.s_addr,
435 &hdr->roce4grh.daddr, 4);
436 src_saddr = src_in.sin_addr.s_addr;
437 dst_saddr = dst_in.sin_addr.s_addr;
438 ipv6_addr_set_v4mapped(src_saddr,
439 (struct in6_addr *)sgid);
440 ipv6_addr_set_v4mapped(dst_saddr,
441 (struct in6_addr *)dgid);
443 } else if (net_type == RDMA_NETWORK_IPV6 ||
444 net_type == RDMA_NETWORK_IB) {
445 *dgid = hdr->ibgrh.dgid;
446 *sgid = hdr->ibgrh.sgid;
452 EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr);
454 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
455 const struct ib_wc *wc, const struct ib_grh *grh,
456 struct rdma_ah_attr *ah_attr)
461 enum rdma_network_type net_type = RDMA_NETWORK_IB;
462 enum ib_gid_type gid_type = IB_GID_TYPE_IB;
467 memset(ah_attr, 0, sizeof *ah_attr);
468 ah_attr->type = rdma_ah_find_type(device, port_num);
469 if (rdma_cap_eth_ah(device, port_num)) {
470 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE)
471 net_type = wc->network_hdr_type;
473 net_type = ib_get_net_type_by_grh(device, port_num, grh);
474 gid_type = ib_network_to_gid_type(net_type);
476 ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
481 if (rdma_protocol_roce(device, port_num)) {
483 u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ?
484 wc->vlan_id : 0xffff;
485 struct net_device *idev;
486 struct net_device *resolved_dev;
488 if (!(wc->wc_flags & IB_WC_GRH))
491 if (!device->get_netdev)
494 idev = device->get_netdev(device, port_num);
498 ret = rdma_addr_find_l2_eth_by_grh(&dgid, &sgid,
500 wc->wc_flags & IB_WC_WITH_VLAN ?
502 &if_index, &hoplimit);
508 resolved_dev = dev_get_by_index(&init_net, if_index);
509 if (resolved_dev->flags & IFF_LOOPBACK) {
510 dev_put(resolved_dev);
512 dev_hold(resolved_dev);
515 if (resolved_dev != idev && !rdma_is_upper_dev_rcu(idev,
520 dev_put(resolved_dev);
524 ret = get_sgid_index_from_eth(device, port_num, vlan_id,
525 &dgid, gid_type, &gid_index);
530 rdma_ah_set_dlid(ah_attr, wc->slid);
531 rdma_ah_set_sl(ah_attr, wc->sl);
532 rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits);
533 rdma_ah_set_port_num(ah_attr, port_num);
535 if (wc->wc_flags & IB_WC_GRH) {
536 if (!rdma_cap_eth_ah(device, port_num)) {
537 if (dgid.global.interface_id != cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) {
538 ret = ib_find_cached_gid_by_port(device, &dgid,
549 flow_class = be32_to_cpu(grh->version_tclass_flow);
550 rdma_ah_set_grh(ah_attr, &sgid,
551 flow_class & 0xFFFFF,
552 (u8)gid_index, hoplimit,
553 (flow_class >> 20) & 0xFF);
558 EXPORT_SYMBOL(ib_init_ah_from_wc);
560 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
561 const struct ib_grh *grh, u8 port_num)
563 struct rdma_ah_attr ah_attr;
566 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
570 return rdma_create_ah(pd, &ah_attr);
572 EXPORT_SYMBOL(ib_create_ah_from_wc);
574 int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
576 if (ah->type != ah_attr->type)
579 return ah->device->modify_ah ?
580 ah->device->modify_ah(ah, ah_attr) :
583 EXPORT_SYMBOL(rdma_modify_ah);
585 int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
587 return ah->device->query_ah ?
588 ah->device->query_ah(ah, ah_attr) :
591 EXPORT_SYMBOL(rdma_query_ah);
593 int rdma_destroy_ah(struct ib_ah *ah)
599 ret = ah->device->destroy_ah(ah);
601 atomic_dec(&pd->usecnt);
605 EXPORT_SYMBOL(rdma_destroy_ah);
607 /* Shared receive queues */
609 struct ib_srq *ib_create_srq(struct ib_pd *pd,
610 struct ib_srq_init_attr *srq_init_attr)
614 if (!pd->device->create_srq)
615 return ERR_PTR(-ENOSYS);
617 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
620 srq->device = pd->device;
623 srq->event_handler = srq_init_attr->event_handler;
624 srq->srq_context = srq_init_attr->srq_context;
625 srq->srq_type = srq_init_attr->srq_type;
626 if (srq->srq_type == IB_SRQT_XRC) {
627 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
628 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq;
629 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
630 atomic_inc(&srq->ext.xrc.cq->usecnt);
632 atomic_inc(&pd->usecnt);
633 atomic_set(&srq->usecnt, 0);
638 EXPORT_SYMBOL(ib_create_srq);
640 int ib_modify_srq(struct ib_srq *srq,
641 struct ib_srq_attr *srq_attr,
642 enum ib_srq_attr_mask srq_attr_mask)
644 return srq->device->modify_srq ?
645 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
648 EXPORT_SYMBOL(ib_modify_srq);
650 int ib_query_srq(struct ib_srq *srq,
651 struct ib_srq_attr *srq_attr)
653 return srq->device->query_srq ?
654 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
656 EXPORT_SYMBOL(ib_query_srq);
658 int ib_destroy_srq(struct ib_srq *srq)
661 enum ib_srq_type srq_type;
662 struct ib_xrcd *uninitialized_var(xrcd);
663 struct ib_cq *uninitialized_var(cq);
666 if (atomic_read(&srq->usecnt))
670 srq_type = srq->srq_type;
671 if (srq_type == IB_SRQT_XRC) {
672 xrcd = srq->ext.xrc.xrcd;
673 cq = srq->ext.xrc.cq;
676 ret = srq->device->destroy_srq(srq);
678 atomic_dec(&pd->usecnt);
679 if (srq_type == IB_SRQT_XRC) {
680 atomic_dec(&xrcd->usecnt);
681 atomic_dec(&cq->usecnt);
687 EXPORT_SYMBOL(ib_destroy_srq);
691 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
693 struct ib_qp *qp = context;
696 spin_lock_irqsave(&qp->device->event_handler_lock, flags);
697 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
698 if (event->element.qp->event_handler)
699 event->element.qp->event_handler(event, event->element.qp->qp_context);
700 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
703 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
705 mutex_lock(&xrcd->tgt_qp_mutex);
706 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
707 mutex_unlock(&xrcd->tgt_qp_mutex);
710 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
711 void (*event_handler)(struct ib_event *, void *),
717 qp = kzalloc(sizeof *qp, GFP_KERNEL);
719 return ERR_PTR(-ENOMEM);
721 qp->real_qp = real_qp;
722 atomic_inc(&real_qp->usecnt);
723 qp->device = real_qp->device;
724 qp->event_handler = event_handler;
725 qp->qp_context = qp_context;
726 qp->qp_num = real_qp->qp_num;
727 qp->qp_type = real_qp->qp_type;
729 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
730 list_add(&qp->open_list, &real_qp->open_list);
731 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
736 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
737 struct ib_qp_open_attr *qp_open_attr)
739 struct ib_qp *qp, *real_qp;
741 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
742 return ERR_PTR(-EINVAL);
744 qp = ERR_PTR(-EINVAL);
745 mutex_lock(&xrcd->tgt_qp_mutex);
746 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
747 if (real_qp->qp_num == qp_open_attr->qp_num) {
748 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
749 qp_open_attr->qp_context);
753 mutex_unlock(&xrcd->tgt_qp_mutex);
756 EXPORT_SYMBOL(ib_open_qp);
758 static struct ib_qp *ib_create_xrc_qp(struct ib_qp *qp,
759 struct ib_qp_init_attr *qp_init_attr)
761 struct ib_qp *real_qp = qp;
763 qp->event_handler = __ib_shared_qp_event_handler;
766 qp->send_cq = qp->recv_cq = NULL;
768 qp->xrcd = qp_init_attr->xrcd;
769 atomic_inc(&qp_init_attr->xrcd->usecnt);
770 INIT_LIST_HEAD(&qp->open_list);
772 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
773 qp_init_attr->qp_context);
775 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
777 real_qp->device->destroy_qp(real_qp);
781 struct ib_qp *ib_create_qp(struct ib_pd *pd,
782 struct ib_qp_init_attr *qp_init_attr)
784 struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device;
788 if (qp_init_attr->rwq_ind_tbl &&
789 (qp_init_attr->recv_cq ||
790 qp_init_attr->srq || qp_init_attr->cap.max_recv_wr ||
791 qp_init_attr->cap.max_recv_sge))
792 return ERR_PTR(-EINVAL);
795 * If the callers is using the RDMA API calculate the resources
796 * needed for the RDMA READ/WRITE operations.
798 * Note that these callers need to pass in a port number.
800 if (qp_init_attr->cap.max_rdma_ctxs)
801 rdma_rw_init_qp(device, qp_init_attr);
803 qp = device->create_qp(pd, qp_init_attr, NULL);
810 qp->qp_type = qp_init_attr->qp_type;
811 qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl;
813 atomic_set(&qp->usecnt, 0);
815 spin_lock_init(&qp->mr_lock);
816 INIT_LIST_HEAD(&qp->rdma_mrs);
817 INIT_LIST_HEAD(&qp->sig_mrs);
819 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT)
820 return ib_create_xrc_qp(qp, qp_init_attr);
822 qp->event_handler = qp_init_attr->event_handler;
823 qp->qp_context = qp_init_attr->qp_context;
824 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
828 qp->recv_cq = qp_init_attr->recv_cq;
829 if (qp_init_attr->recv_cq)
830 atomic_inc(&qp_init_attr->recv_cq->usecnt);
831 qp->srq = qp_init_attr->srq;
833 atomic_inc(&qp_init_attr->srq->usecnt);
837 qp->send_cq = qp_init_attr->send_cq;
840 atomic_inc(&pd->usecnt);
841 if (qp_init_attr->send_cq)
842 atomic_inc(&qp_init_attr->send_cq->usecnt);
843 if (qp_init_attr->rwq_ind_tbl)
844 atomic_inc(&qp->rwq_ind_tbl->usecnt);
846 if (qp_init_attr->cap.max_rdma_ctxs) {
847 ret = rdma_rw_init_mrs(qp, qp_init_attr);
849 pr_err("failed to init MR pool ret= %d\n", ret);
856 * Note: all hw drivers guarantee that max_send_sge is lower than
857 * the device RDMA WRITE SGE limit but not all hw drivers ensure that
858 * max_send_sge <= max_sge_rd.
860 qp->max_write_sge = qp_init_attr->cap.max_send_sge;
861 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge,
862 device->attrs.max_sge_rd);
866 EXPORT_SYMBOL(ib_create_qp);
868 static const struct {
870 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
871 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
872 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
874 [IB_QPS_RESET] = { .valid = 1 },
878 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
881 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
882 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
885 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
888 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
891 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
894 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
896 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
902 [IB_QPS_RESET] = { .valid = 1 },
903 [IB_QPS_ERR] = { .valid = 1 },
907 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
910 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
913 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
916 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
919 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
922 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
924 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
931 [IB_QPT_UC] = (IB_QP_AV |
935 [IB_QPT_RC] = (IB_QP_AV |
939 IB_QP_MAX_DEST_RD_ATOMIC |
940 IB_QP_MIN_RNR_TIMER),
941 [IB_QPT_XRC_INI] = (IB_QP_AV |
945 [IB_QPT_XRC_TGT] = (IB_QP_AV |
949 IB_QP_MAX_DEST_RD_ATOMIC |
950 IB_QP_MIN_RNR_TIMER),
953 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
955 [IB_QPT_UC] = (IB_QP_ALT_PATH |
958 [IB_QPT_RC] = (IB_QP_ALT_PATH |
961 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
964 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
967 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
969 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
975 [IB_QPS_RESET] = { .valid = 1 },
976 [IB_QPS_ERR] = { .valid = 1 },
980 [IB_QPT_UD] = IB_QP_SQ_PSN,
981 [IB_QPT_UC] = IB_QP_SQ_PSN,
982 [IB_QPT_RC] = (IB_QP_TIMEOUT |
986 IB_QP_MAX_QP_RD_ATOMIC),
987 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
991 IB_QP_MAX_QP_RD_ATOMIC),
992 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
994 [IB_QPT_SMI] = IB_QP_SQ_PSN,
995 [IB_QPT_GSI] = IB_QP_SQ_PSN,
998 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1000 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1002 IB_QP_ACCESS_FLAGS |
1003 IB_QP_PATH_MIG_STATE),
1004 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1006 IB_QP_ACCESS_FLAGS |
1007 IB_QP_MIN_RNR_TIMER |
1008 IB_QP_PATH_MIG_STATE),
1009 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1011 IB_QP_ACCESS_FLAGS |
1012 IB_QP_PATH_MIG_STATE),
1013 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1015 IB_QP_ACCESS_FLAGS |
1016 IB_QP_MIN_RNR_TIMER |
1017 IB_QP_PATH_MIG_STATE),
1018 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1020 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1022 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1027 [IB_QPS_RESET] = { .valid = 1 },
1028 [IB_QPS_ERR] = { .valid = 1 },
1032 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1034 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1035 IB_QP_ACCESS_FLAGS |
1037 IB_QP_PATH_MIG_STATE),
1038 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1039 IB_QP_ACCESS_FLAGS |
1041 IB_QP_PATH_MIG_STATE |
1042 IB_QP_MIN_RNR_TIMER),
1043 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1044 IB_QP_ACCESS_FLAGS |
1046 IB_QP_PATH_MIG_STATE),
1047 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1048 IB_QP_ACCESS_FLAGS |
1050 IB_QP_PATH_MIG_STATE |
1051 IB_QP_MIN_RNR_TIMER),
1052 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1054 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1056 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1062 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1063 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1064 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1065 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1066 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
1067 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1068 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
1073 [IB_QPS_RESET] = { .valid = 1 },
1074 [IB_QPS_ERR] = { .valid = 1 },
1078 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1080 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1082 IB_QP_ACCESS_FLAGS |
1083 IB_QP_PATH_MIG_STATE),
1084 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1086 IB_QP_ACCESS_FLAGS |
1087 IB_QP_MIN_RNR_TIMER |
1088 IB_QP_PATH_MIG_STATE),
1089 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1091 IB_QP_ACCESS_FLAGS |
1092 IB_QP_PATH_MIG_STATE),
1093 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1095 IB_QP_ACCESS_FLAGS |
1096 IB_QP_MIN_RNR_TIMER |
1097 IB_QP_PATH_MIG_STATE),
1098 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1100 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1107 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1109 [IB_QPT_UC] = (IB_QP_AV |
1111 IB_QP_ACCESS_FLAGS |
1113 IB_QP_PATH_MIG_STATE),
1114 [IB_QPT_RC] = (IB_QP_PORT |
1119 IB_QP_MAX_QP_RD_ATOMIC |
1120 IB_QP_MAX_DEST_RD_ATOMIC |
1122 IB_QP_ACCESS_FLAGS |
1124 IB_QP_MIN_RNR_TIMER |
1125 IB_QP_PATH_MIG_STATE),
1126 [IB_QPT_XRC_INI] = (IB_QP_PORT |
1131 IB_QP_MAX_QP_RD_ATOMIC |
1133 IB_QP_ACCESS_FLAGS |
1135 IB_QP_PATH_MIG_STATE),
1136 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
1139 IB_QP_MAX_DEST_RD_ATOMIC |
1141 IB_QP_ACCESS_FLAGS |
1143 IB_QP_MIN_RNR_TIMER |
1144 IB_QP_PATH_MIG_STATE),
1145 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1147 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1153 [IB_QPS_RESET] = { .valid = 1 },
1154 [IB_QPS_ERR] = { .valid = 1 },
1158 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1160 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1161 IB_QP_ACCESS_FLAGS),
1162 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1164 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1170 [IB_QPS_RESET] = { .valid = 1 },
1171 [IB_QPS_ERR] = { .valid = 1 }
1175 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
1176 enum ib_qp_type type, enum ib_qp_attr_mask mask,
1177 enum rdma_link_layer ll)
1179 enum ib_qp_attr_mask req_param, opt_param;
1181 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
1182 next_state < 0 || next_state > IB_QPS_ERR)
1185 if (mask & IB_QP_CUR_STATE &&
1186 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
1187 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
1190 if (!qp_state_table[cur_state][next_state].valid)
1193 req_param = qp_state_table[cur_state][next_state].req_param[type];
1194 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
1196 if ((mask & req_param) != req_param)
1199 if (mask & ~(req_param | opt_param | IB_QP_STATE))
1204 EXPORT_SYMBOL(ib_modify_qp_is_ok);
1206 int ib_resolve_eth_dmac(struct ib_device *device,
1207 struct rdma_ah_attr *ah_attr)
1210 struct ib_global_route *grh;
1212 if (!rdma_is_port_valid(device, rdma_ah_get_port_num(ah_attr)))
1215 if (ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE)
1218 grh = rdma_ah_retrieve_grh(ah_attr);
1220 if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw)) {
1221 rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw,
1222 ah_attr->roce.dmac);
1225 struct ib_gid_attr sgid_attr;
1229 ret = ib_query_gid(device,
1230 rdma_ah_get_port_num(ah_attr),
1234 if (ret || !sgid_attr.ndev) {
1240 ifindex = sgid_attr.ndev->ifindex;
1243 rdma_addr_find_l2_eth_by_grh(&sgid, &grh->dgid,
1245 NULL, &ifindex, &hop_limit);
1247 dev_put(sgid_attr.ndev);
1249 grh->hop_limit = hop_limit;
1254 EXPORT_SYMBOL(ib_resolve_eth_dmac);
1256 int ib_modify_qp(struct ib_qp *qp,
1257 struct ib_qp_attr *qp_attr,
1261 if (qp_attr_mask & IB_QP_AV) {
1264 ret = ib_resolve_eth_dmac(qp->device, &qp_attr->ah_attr);
1269 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
1271 EXPORT_SYMBOL(ib_modify_qp);
1273 int ib_query_qp(struct ib_qp *qp,
1274 struct ib_qp_attr *qp_attr,
1276 struct ib_qp_init_attr *qp_init_attr)
1278 return qp->device->query_qp ?
1279 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
1282 EXPORT_SYMBOL(ib_query_qp);
1284 int ib_close_qp(struct ib_qp *qp)
1286 struct ib_qp *real_qp;
1287 unsigned long flags;
1289 real_qp = qp->real_qp;
1293 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1294 list_del(&qp->open_list);
1295 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1297 atomic_dec(&real_qp->usecnt);
1302 EXPORT_SYMBOL(ib_close_qp);
1304 static int __ib_destroy_shared_qp(struct ib_qp *qp)
1306 struct ib_xrcd *xrcd;
1307 struct ib_qp *real_qp;
1310 real_qp = qp->real_qp;
1311 xrcd = real_qp->xrcd;
1313 mutex_lock(&xrcd->tgt_qp_mutex);
1315 if (atomic_read(&real_qp->usecnt) == 0)
1316 list_del(&real_qp->xrcd_list);
1319 mutex_unlock(&xrcd->tgt_qp_mutex);
1322 ret = ib_destroy_qp(real_qp);
1324 atomic_dec(&xrcd->usecnt);
1326 __ib_insert_xrcd_qp(xrcd, real_qp);
1332 int ib_destroy_qp(struct ib_qp *qp)
1335 struct ib_cq *scq, *rcq;
1337 struct ib_rwq_ind_table *ind_tbl;
1340 WARN_ON_ONCE(qp->mrs_used > 0);
1342 if (atomic_read(&qp->usecnt))
1345 if (qp->real_qp != qp)
1346 return __ib_destroy_shared_qp(qp);
1352 ind_tbl = qp->rwq_ind_tbl;
1355 rdma_rw_cleanup_mrs(qp);
1357 ret = qp->device->destroy_qp(qp);
1360 atomic_dec(&pd->usecnt);
1362 atomic_dec(&scq->usecnt);
1364 atomic_dec(&rcq->usecnt);
1366 atomic_dec(&srq->usecnt);
1368 atomic_dec(&ind_tbl->usecnt);
1373 EXPORT_SYMBOL(ib_destroy_qp);
1375 /* Completion queues */
1377 struct ib_cq *ib_create_cq(struct ib_device *device,
1378 ib_comp_handler comp_handler,
1379 void (*event_handler)(struct ib_event *, void *),
1381 const struct ib_cq_init_attr *cq_attr)
1385 cq = device->create_cq(device, cq_attr, NULL, NULL);
1388 cq->device = device;
1390 cq->comp_handler = comp_handler;
1391 cq->event_handler = event_handler;
1392 cq->cq_context = cq_context;
1393 atomic_set(&cq->usecnt, 0);
1398 EXPORT_SYMBOL(ib_create_cq);
1400 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1402 return cq->device->modify_cq ?
1403 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
1405 EXPORT_SYMBOL(ib_modify_cq);
1407 int ib_destroy_cq(struct ib_cq *cq)
1409 if (atomic_read(&cq->usecnt))
1412 return cq->device->destroy_cq(cq);
1414 EXPORT_SYMBOL(ib_destroy_cq);
1416 int ib_resize_cq(struct ib_cq *cq, int cqe)
1418 return cq->device->resize_cq ?
1419 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
1421 EXPORT_SYMBOL(ib_resize_cq);
1423 /* Memory regions */
1425 int ib_dereg_mr(struct ib_mr *mr)
1427 struct ib_pd *pd = mr->pd;
1430 ret = mr->device->dereg_mr(mr);
1432 atomic_dec(&pd->usecnt);
1436 EXPORT_SYMBOL(ib_dereg_mr);
1439 * ib_alloc_mr() - Allocates a memory region
1440 * @pd: protection domain associated with the region
1441 * @mr_type: memory region type
1442 * @max_num_sg: maximum sg entries available for registration.
1445 * Memory registeration page/sg lists must not exceed max_num_sg.
1446 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
1447 * max_num_sg * used_page_size.
1450 struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
1451 enum ib_mr_type mr_type,
1456 if (!pd->device->alloc_mr)
1457 return ERR_PTR(-ENOSYS);
1459 mr = pd->device->alloc_mr(pd, mr_type, max_num_sg);
1461 mr->device = pd->device;
1464 atomic_inc(&pd->usecnt);
1465 mr->need_inval = false;
1470 EXPORT_SYMBOL(ib_alloc_mr);
1472 /* "Fast" memory regions */
1474 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1475 int mr_access_flags,
1476 struct ib_fmr_attr *fmr_attr)
1480 if (!pd->device->alloc_fmr)
1481 return ERR_PTR(-ENOSYS);
1483 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1485 fmr->device = pd->device;
1487 atomic_inc(&pd->usecnt);
1492 EXPORT_SYMBOL(ib_alloc_fmr);
1494 int ib_unmap_fmr(struct list_head *fmr_list)
1498 if (list_empty(fmr_list))
1501 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1502 return fmr->device->unmap_fmr(fmr_list);
1504 EXPORT_SYMBOL(ib_unmap_fmr);
1506 int ib_dealloc_fmr(struct ib_fmr *fmr)
1512 ret = fmr->device->dealloc_fmr(fmr);
1514 atomic_dec(&pd->usecnt);
1518 EXPORT_SYMBOL(ib_dealloc_fmr);
1520 /* Multicast groups */
1522 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1526 if (!qp->device->attach_mcast)
1528 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD ||
1529 lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
1530 lid == be16_to_cpu(IB_LID_PERMISSIVE))
1533 ret = qp->device->attach_mcast(qp, gid, lid);
1535 atomic_inc(&qp->usecnt);
1538 EXPORT_SYMBOL(ib_attach_mcast);
1540 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1544 if (!qp->device->detach_mcast)
1546 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD ||
1547 lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
1548 lid == be16_to_cpu(IB_LID_PERMISSIVE))
1551 ret = qp->device->detach_mcast(qp, gid, lid);
1553 atomic_dec(&qp->usecnt);
1556 EXPORT_SYMBOL(ib_detach_mcast);
1558 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1560 struct ib_xrcd *xrcd;
1562 if (!device->alloc_xrcd)
1563 return ERR_PTR(-ENOSYS);
1565 xrcd = device->alloc_xrcd(device, NULL, NULL);
1566 if (!IS_ERR(xrcd)) {
1567 xrcd->device = device;
1569 atomic_set(&xrcd->usecnt, 0);
1570 mutex_init(&xrcd->tgt_qp_mutex);
1571 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1576 EXPORT_SYMBOL(ib_alloc_xrcd);
1578 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1583 if (atomic_read(&xrcd->usecnt))
1586 while (!list_empty(&xrcd->tgt_qp_list)) {
1587 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1588 ret = ib_destroy_qp(qp);
1593 return xrcd->device->dealloc_xrcd(xrcd);
1595 EXPORT_SYMBOL(ib_dealloc_xrcd);
1598 * ib_create_wq - Creates a WQ associated with the specified protection
1600 * @pd: The protection domain associated with the WQ.
1601 * @wq_init_attr: A list of initial attributes required to create the
1602 * WQ. If WQ creation succeeds, then the attributes are updated to
1603 * the actual capabilities of the created WQ.
1605 * wq_init_attr->max_wr and wq_init_attr->max_sge determine
1606 * the requested size of the WQ, and set to the actual values allocated
1608 * If ib_create_wq() succeeds, then max_wr and max_sge will always be
1609 * at least as large as the requested values.
1611 struct ib_wq *ib_create_wq(struct ib_pd *pd,
1612 struct ib_wq_init_attr *wq_attr)
1616 if (!pd->device->create_wq)
1617 return ERR_PTR(-ENOSYS);
1619 wq = pd->device->create_wq(pd, wq_attr, NULL);
1621 wq->event_handler = wq_attr->event_handler;
1622 wq->wq_context = wq_attr->wq_context;
1623 wq->wq_type = wq_attr->wq_type;
1624 wq->cq = wq_attr->cq;
1625 wq->device = pd->device;
1628 atomic_inc(&pd->usecnt);
1629 atomic_inc(&wq_attr->cq->usecnt);
1630 atomic_set(&wq->usecnt, 0);
1634 EXPORT_SYMBOL(ib_create_wq);
1637 * ib_destroy_wq - Destroys the specified WQ.
1638 * @wq: The WQ to destroy.
1640 int ib_destroy_wq(struct ib_wq *wq)
1643 struct ib_cq *cq = wq->cq;
1644 struct ib_pd *pd = wq->pd;
1646 if (atomic_read(&wq->usecnt))
1649 err = wq->device->destroy_wq(wq);
1651 atomic_dec(&pd->usecnt);
1652 atomic_dec(&cq->usecnt);
1656 EXPORT_SYMBOL(ib_destroy_wq);
1659 * ib_modify_wq - Modifies the specified WQ.
1660 * @wq: The WQ to modify.
1661 * @wq_attr: On input, specifies the WQ attributes to modify.
1662 * @wq_attr_mask: A bit-mask used to specify which attributes of the WQ
1663 * are being modified.
1664 * On output, the current values of selected WQ attributes are returned.
1666 int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
1671 if (!wq->device->modify_wq)
1674 err = wq->device->modify_wq(wq, wq_attr, wq_attr_mask, NULL);
1677 EXPORT_SYMBOL(ib_modify_wq);
1680 * ib_create_rwq_ind_table - Creates a RQ Indirection Table.
1681 * @device: The device on which to create the rwq indirection table.
1682 * @ib_rwq_ind_table_init_attr: A list of initial attributes required to
1683 * create the Indirection Table.
1685 * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less
1686 * than the created ib_rwq_ind_table object and the caller is responsible
1687 * for its memory allocation/free.
1689 struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device,
1690 struct ib_rwq_ind_table_init_attr *init_attr)
1692 struct ib_rwq_ind_table *rwq_ind_table;
1696 if (!device->create_rwq_ind_table)
1697 return ERR_PTR(-ENOSYS);
1699 table_size = (1 << init_attr->log_ind_tbl_size);
1700 rwq_ind_table = device->create_rwq_ind_table(device,
1702 if (IS_ERR(rwq_ind_table))
1703 return rwq_ind_table;
1705 rwq_ind_table->ind_tbl = init_attr->ind_tbl;
1706 rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size;
1707 rwq_ind_table->device = device;
1708 rwq_ind_table->uobject = NULL;
1709 atomic_set(&rwq_ind_table->usecnt, 0);
1711 for (i = 0; i < table_size; i++)
1712 atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt);
1714 return rwq_ind_table;
1716 EXPORT_SYMBOL(ib_create_rwq_ind_table);
1719 * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table.
1720 * @wq_ind_table: The Indirection Table to destroy.
1722 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table)
1725 u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size);
1726 struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl;
1728 if (atomic_read(&rwq_ind_table->usecnt))
1731 err = rwq_ind_table->device->destroy_rwq_ind_table(rwq_ind_table);
1733 for (i = 0; i < table_size; i++)
1734 atomic_dec(&ind_tbl[i]->usecnt);
1739 EXPORT_SYMBOL(ib_destroy_rwq_ind_table);
1741 struct ib_flow *ib_create_flow(struct ib_qp *qp,
1742 struct ib_flow_attr *flow_attr,
1745 struct ib_flow *flow_id;
1746 if (!qp->device->create_flow)
1747 return ERR_PTR(-ENOSYS);
1749 flow_id = qp->device->create_flow(qp, flow_attr, domain);
1750 if (!IS_ERR(flow_id)) {
1751 atomic_inc(&qp->usecnt);
1756 EXPORT_SYMBOL(ib_create_flow);
1758 int ib_destroy_flow(struct ib_flow *flow_id)
1761 struct ib_qp *qp = flow_id->qp;
1763 err = qp->device->destroy_flow(flow_id);
1765 atomic_dec(&qp->usecnt);
1768 EXPORT_SYMBOL(ib_destroy_flow);
1770 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
1771 struct ib_mr_status *mr_status)
1773 return mr->device->check_mr_status ?
1774 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS;
1776 EXPORT_SYMBOL(ib_check_mr_status);
1778 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port,
1781 if (!device->set_vf_link_state)
1784 return device->set_vf_link_state(device, vf, port, state);
1786 EXPORT_SYMBOL(ib_set_vf_link_state);
1788 int ib_get_vf_config(struct ib_device *device, int vf, u8 port,
1789 struct ifla_vf_info *info)
1791 if (!device->get_vf_config)
1794 return device->get_vf_config(device, vf, port, info);
1796 EXPORT_SYMBOL(ib_get_vf_config);
1798 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port,
1799 struct ifla_vf_stats *stats)
1801 if (!device->get_vf_stats)
1804 return device->get_vf_stats(device, vf, port, stats);
1806 EXPORT_SYMBOL(ib_get_vf_stats);
1808 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid,
1811 if (!device->set_vf_guid)
1814 return device->set_vf_guid(device, vf, port, guid, type);
1816 EXPORT_SYMBOL(ib_set_vf_guid);
1819 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
1820 * and set it the memory region.
1821 * @mr: memory region
1822 * @sg: dma mapped scatterlist
1823 * @sg_nents: number of entries in sg
1824 * @sg_offset: offset in bytes into sg
1825 * @page_size: page vector desired page size
1828 * - The first sg element is allowed to have an offset.
1829 * - Each sg element must either be aligned to page_size or virtually
1830 * contiguous to the previous element. In case an sg element has a
1831 * non-contiguous offset, the mapping prefix will not include it.
1832 * - The last sg element is allowed to have length less than page_size.
1833 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size
1834 * then only max_num_sg entries will be mapped.
1835 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
1836 * constraints holds and the page_size argument is ignored.
1838 * Returns the number of sg elements that were mapped to the memory region.
1840 * After this completes successfully, the memory region
1841 * is ready for registration.
1843 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
1844 unsigned int *sg_offset, unsigned int page_size)
1846 if (unlikely(!mr->device->map_mr_sg))
1849 mr->page_size = page_size;
1851 return mr->device->map_mr_sg(mr, sg, sg_nents, sg_offset);
1853 EXPORT_SYMBOL(ib_map_mr_sg);
1856 * ib_sg_to_pages() - Convert the largest prefix of a sg list
1858 * @mr: memory region
1859 * @sgl: dma mapped scatterlist
1860 * @sg_nents: number of entries in sg
1861 * @sg_offset_p: IN: start offset in bytes into sg
1862 * OUT: offset in bytes for element n of the sg of the first
1863 * byte that has not been processed where n is the return
1864 * value of this function.
1865 * @set_page: driver page assignment function pointer
1867 * Core service helper for drivers to convert the largest
1868 * prefix of given sg list to a page vector. The sg list
1869 * prefix converted is the prefix that meet the requirements
1872 * Returns the number of sg elements that were assigned to
1875 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
1876 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))
1878 struct scatterlist *sg;
1879 u64 last_end_dma_addr = 0;
1880 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
1881 unsigned int last_page_off = 0;
1882 u64 page_mask = ~((u64)mr->page_size - 1);
1885 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))
1888 mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
1891 for_each_sg(sgl, sg, sg_nents, i) {
1892 u64 dma_addr = sg_dma_address(sg) + sg_offset;
1893 u64 prev_addr = dma_addr;
1894 unsigned int dma_len = sg_dma_len(sg) - sg_offset;
1895 u64 end_dma_addr = dma_addr + dma_len;
1896 u64 page_addr = dma_addr & page_mask;
1899 * For the second and later elements, check whether either the
1900 * end of element i-1 or the start of element i is not aligned
1901 * on a page boundary.
1903 if (i && (last_page_off != 0 || page_addr != dma_addr)) {
1904 /* Stop mapping if there is a gap. */
1905 if (last_end_dma_addr != dma_addr)
1909 * Coalesce this element with the last. If it is small
1910 * enough just update mr->length. Otherwise start
1911 * mapping from the next page.
1917 ret = set_page(mr, page_addr);
1918 if (unlikely(ret < 0)) {
1919 sg_offset = prev_addr - sg_dma_address(sg);
1920 mr->length += prev_addr - dma_addr;
1922 *sg_offset_p = sg_offset;
1923 return i || sg_offset ? i : ret;
1925 prev_addr = page_addr;
1927 page_addr += mr->page_size;
1928 } while (page_addr < end_dma_addr);
1930 mr->length += dma_len;
1931 last_end_dma_addr = end_dma_addr;
1932 last_page_off = end_dma_addr & ~page_mask;
1941 EXPORT_SYMBOL(ib_sg_to_pages);
1943 struct ib_drain_cqe {
1945 struct completion done;
1948 static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc)
1950 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe,
1953 complete(&cqe->done);
1957 * Post a WR and block until its completion is reaped for the SQ.
1959 static void __ib_drain_sq(struct ib_qp *qp)
1961 struct ib_cq *cq = qp->send_cq;
1962 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
1963 struct ib_drain_cqe sdrain;
1964 struct ib_send_wr swr = {}, *bad_swr;
1967 swr.wr_cqe = &sdrain.cqe;
1968 sdrain.cqe.done = ib_drain_qp_done;
1969 init_completion(&sdrain.done);
1971 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
1973 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
1977 ret = ib_post_send(qp, &swr, &bad_swr);
1979 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
1983 if (cq->poll_ctx == IB_POLL_DIRECT)
1984 while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0)
1985 ib_process_cq_direct(cq, -1);
1987 wait_for_completion(&sdrain.done);
1991 * Post a WR and block until its completion is reaped for the RQ.
1993 static void __ib_drain_rq(struct ib_qp *qp)
1995 struct ib_cq *cq = qp->recv_cq;
1996 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
1997 struct ib_drain_cqe rdrain;
1998 struct ib_recv_wr rwr = {}, *bad_rwr;
2001 rwr.wr_cqe = &rdrain.cqe;
2002 rdrain.cqe.done = ib_drain_qp_done;
2003 init_completion(&rdrain.done);
2005 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2007 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2011 ret = ib_post_recv(qp, &rwr, &bad_rwr);
2013 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2017 if (cq->poll_ctx == IB_POLL_DIRECT)
2018 while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0)
2019 ib_process_cq_direct(cq, -1);
2021 wait_for_completion(&rdrain.done);
2025 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the
2027 * @qp: queue pair to drain
2029 * If the device has a provider-specific drain function, then
2030 * call that. Otherwise call the generic drain function
2035 * ensure there is room in the CQ and SQ for the drain work request and
2038 * allocate the CQ using ib_alloc_cq().
2040 * ensure that there are no other contexts that are posting WRs concurrently.
2041 * Otherwise the drain is not guaranteed.
2043 void ib_drain_sq(struct ib_qp *qp)
2045 if (qp->device->drain_sq)
2046 qp->device->drain_sq(qp);
2050 EXPORT_SYMBOL(ib_drain_sq);
2053 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the
2055 * @qp: queue pair to drain
2057 * If the device has a provider-specific drain function, then
2058 * call that. Otherwise call the generic drain function
2063 * ensure there is room in the CQ and RQ for the drain work request and
2066 * allocate the CQ using ib_alloc_cq().
2068 * ensure that there are no other contexts that are posting WRs concurrently.
2069 * Otherwise the drain is not guaranteed.
2071 void ib_drain_rq(struct ib_qp *qp)
2073 if (qp->device->drain_rq)
2074 qp->device->drain_rq(qp);
2078 EXPORT_SYMBOL(ib_drain_rq);
2081 * ib_drain_qp() - Block until all CQEs have been consumed by the
2082 * application on both the RQ and SQ.
2083 * @qp: queue pair to drain
2087 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests
2090 * allocate the CQs using ib_alloc_cq().
2092 * ensure that there are no other contexts that are posting WRs concurrently.
2093 * Otherwise the drain is not guaranteed.
2095 void ib_drain_qp(struct ib_qp *qp)
2101 EXPORT_SYMBOL(ib_drain_qp);