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>
47 #include <linux/security.h>
49 #include <rdma/ib_verbs.h>
50 #include <rdma/ib_cache.h>
51 #include <rdma/ib_addr.h>
54 #include "core_priv.h"
56 static const char * const ib_events
[] = {
57 [IB_EVENT_CQ_ERR
] = "CQ error",
58 [IB_EVENT_QP_FATAL
] = "QP fatal error",
59 [IB_EVENT_QP_REQ_ERR
] = "QP request error",
60 [IB_EVENT_QP_ACCESS_ERR
] = "QP access error",
61 [IB_EVENT_COMM_EST
] = "communication established",
62 [IB_EVENT_SQ_DRAINED
] = "send queue drained",
63 [IB_EVENT_PATH_MIG
] = "path migration successful",
64 [IB_EVENT_PATH_MIG_ERR
] = "path migration error",
65 [IB_EVENT_DEVICE_FATAL
] = "device fatal error",
66 [IB_EVENT_PORT_ACTIVE
] = "port active",
67 [IB_EVENT_PORT_ERR
] = "port error",
68 [IB_EVENT_LID_CHANGE
] = "LID change",
69 [IB_EVENT_PKEY_CHANGE
] = "P_key change",
70 [IB_EVENT_SM_CHANGE
] = "SM change",
71 [IB_EVENT_SRQ_ERR
] = "SRQ error",
72 [IB_EVENT_SRQ_LIMIT_REACHED
] = "SRQ limit reached",
73 [IB_EVENT_QP_LAST_WQE_REACHED
] = "last WQE reached",
74 [IB_EVENT_CLIENT_REREGISTER
] = "client reregister",
75 [IB_EVENT_GID_CHANGE
] = "GID changed",
78 const char *__attribute_const__
ib_event_msg(enum ib_event_type event
)
82 return (index
< ARRAY_SIZE(ib_events
) && ib_events
[index
]) ?
83 ib_events
[index
] : "unrecognized event";
85 EXPORT_SYMBOL(ib_event_msg
);
87 static const char * const wc_statuses
[] = {
88 [IB_WC_SUCCESS
] = "success",
89 [IB_WC_LOC_LEN_ERR
] = "local length error",
90 [IB_WC_LOC_QP_OP_ERR
] = "local QP operation error",
91 [IB_WC_LOC_EEC_OP_ERR
] = "local EE context operation error",
92 [IB_WC_LOC_PROT_ERR
] = "local protection error",
93 [IB_WC_WR_FLUSH_ERR
] = "WR flushed",
94 [IB_WC_MW_BIND_ERR
] = "memory management operation error",
95 [IB_WC_BAD_RESP_ERR
] = "bad response error",
96 [IB_WC_LOC_ACCESS_ERR
] = "local access error",
97 [IB_WC_REM_INV_REQ_ERR
] = "invalid request error",
98 [IB_WC_REM_ACCESS_ERR
] = "remote access error",
99 [IB_WC_REM_OP_ERR
] = "remote operation error",
100 [IB_WC_RETRY_EXC_ERR
] = "transport retry counter exceeded",
101 [IB_WC_RNR_RETRY_EXC_ERR
] = "RNR retry counter exceeded",
102 [IB_WC_LOC_RDD_VIOL_ERR
] = "local RDD violation error",
103 [IB_WC_REM_INV_RD_REQ_ERR
] = "remote invalid RD request",
104 [IB_WC_REM_ABORT_ERR
] = "operation aborted",
105 [IB_WC_INV_EECN_ERR
] = "invalid EE context number",
106 [IB_WC_INV_EEC_STATE_ERR
] = "invalid EE context state",
107 [IB_WC_FATAL_ERR
] = "fatal error",
108 [IB_WC_RESP_TIMEOUT_ERR
] = "response timeout error",
109 [IB_WC_GENERAL_ERR
] = "general error",
112 const char *__attribute_const__
ib_wc_status_msg(enum ib_wc_status status
)
114 size_t index
= status
;
116 return (index
< ARRAY_SIZE(wc_statuses
) && wc_statuses
[index
]) ?
117 wc_statuses
[index
] : "unrecognized status";
119 EXPORT_SYMBOL(ib_wc_status_msg
);
121 __attribute_const__
int ib_rate_to_mult(enum ib_rate rate
)
124 case IB_RATE_2_5_GBPS
: return 1;
125 case IB_RATE_5_GBPS
: return 2;
126 case IB_RATE_10_GBPS
: return 4;
127 case IB_RATE_20_GBPS
: return 8;
128 case IB_RATE_30_GBPS
: return 12;
129 case IB_RATE_40_GBPS
: return 16;
130 case IB_RATE_60_GBPS
: return 24;
131 case IB_RATE_80_GBPS
: return 32;
132 case IB_RATE_120_GBPS
: return 48;
136 EXPORT_SYMBOL(ib_rate_to_mult
);
138 __attribute_const__
enum ib_rate
mult_to_ib_rate(int mult
)
141 case 1: return IB_RATE_2_5_GBPS
;
142 case 2: return IB_RATE_5_GBPS
;
143 case 4: return IB_RATE_10_GBPS
;
144 case 8: return IB_RATE_20_GBPS
;
145 case 12: return IB_RATE_30_GBPS
;
146 case 16: return IB_RATE_40_GBPS
;
147 case 24: return IB_RATE_60_GBPS
;
148 case 32: return IB_RATE_80_GBPS
;
149 case 48: return IB_RATE_120_GBPS
;
150 default: return IB_RATE_PORT_CURRENT
;
153 EXPORT_SYMBOL(mult_to_ib_rate
);
155 __attribute_const__
int ib_rate_to_mbps(enum ib_rate rate
)
158 case IB_RATE_2_5_GBPS
: return 2500;
159 case IB_RATE_5_GBPS
: return 5000;
160 case IB_RATE_10_GBPS
: return 10000;
161 case IB_RATE_20_GBPS
: return 20000;
162 case IB_RATE_30_GBPS
: return 30000;
163 case IB_RATE_40_GBPS
: return 40000;
164 case IB_RATE_60_GBPS
: return 60000;
165 case IB_RATE_80_GBPS
: return 80000;
166 case IB_RATE_120_GBPS
: return 120000;
167 case IB_RATE_14_GBPS
: return 14062;
168 case IB_RATE_56_GBPS
: return 56250;
169 case IB_RATE_112_GBPS
: return 112500;
170 case IB_RATE_168_GBPS
: return 168750;
171 case IB_RATE_25_GBPS
: return 25781;
172 case IB_RATE_100_GBPS
: return 103125;
173 case IB_RATE_200_GBPS
: return 206250;
174 case IB_RATE_300_GBPS
: return 309375;
178 EXPORT_SYMBOL(ib_rate_to_mbps
);
180 __attribute_const__
enum rdma_transport_type
181 rdma_node_get_transport(enum rdma_node_type node_type
)
184 case RDMA_NODE_IB_CA
:
185 case RDMA_NODE_IB_SWITCH
:
186 case RDMA_NODE_IB_ROUTER
:
187 return RDMA_TRANSPORT_IB
;
189 return RDMA_TRANSPORT_IWARP
;
190 case RDMA_NODE_USNIC
:
191 return RDMA_TRANSPORT_USNIC
;
192 case RDMA_NODE_USNIC_UDP
:
193 return RDMA_TRANSPORT_USNIC_UDP
;
199 EXPORT_SYMBOL(rdma_node_get_transport
);
201 enum rdma_link_layer
rdma_port_get_link_layer(struct ib_device
*device
, u8 port_num
)
203 if (device
->get_link_layer
)
204 return device
->get_link_layer(device
, port_num
);
206 switch (rdma_node_get_transport(device
->node_type
)) {
207 case RDMA_TRANSPORT_IB
:
208 return IB_LINK_LAYER_INFINIBAND
;
209 case RDMA_TRANSPORT_IWARP
:
210 case RDMA_TRANSPORT_USNIC
:
211 case RDMA_TRANSPORT_USNIC_UDP
:
212 return IB_LINK_LAYER_ETHERNET
;
214 return IB_LINK_LAYER_UNSPECIFIED
;
217 EXPORT_SYMBOL(rdma_port_get_link_layer
);
219 /* Protection domains */
222 * ib_alloc_pd - Allocates an unused protection domain.
223 * @device: The device on which to allocate the protection domain.
225 * A protection domain object provides an association between QPs, shared
226 * receive queues, address handles, memory regions, and memory windows.
228 * Every PD has a local_dma_lkey which can be used as the lkey value for local
231 struct ib_pd
*__ib_alloc_pd(struct ib_device
*device
, unsigned int flags
,
235 int mr_access_flags
= 0;
237 pd
= device
->alloc_pd(device
, NULL
, NULL
);
243 pd
->__internal_mr
= NULL
;
244 atomic_set(&pd
->usecnt
, 0);
247 if (device
->attrs
.device_cap_flags
& IB_DEVICE_LOCAL_DMA_LKEY
)
248 pd
->local_dma_lkey
= device
->local_dma_lkey
;
250 mr_access_flags
|= IB_ACCESS_LOCAL_WRITE
;
252 if (flags
& IB_PD_UNSAFE_GLOBAL_RKEY
) {
253 pr_warn("%s: enabling unsafe global rkey\n", caller
);
254 mr_access_flags
|= IB_ACCESS_REMOTE_READ
| IB_ACCESS_REMOTE_WRITE
;
257 if (mr_access_flags
) {
260 mr
= pd
->device
->get_dma_mr(pd
, mr_access_flags
);
266 mr
->device
= pd
->device
;
269 mr
->need_inval
= false;
271 pd
->__internal_mr
= mr
;
273 if (!(device
->attrs
.device_cap_flags
& IB_DEVICE_LOCAL_DMA_LKEY
))
274 pd
->local_dma_lkey
= pd
->__internal_mr
->lkey
;
276 if (flags
& IB_PD_UNSAFE_GLOBAL_RKEY
)
277 pd
->unsafe_global_rkey
= pd
->__internal_mr
->rkey
;
282 EXPORT_SYMBOL(__ib_alloc_pd
);
285 * ib_dealloc_pd - Deallocates a protection domain.
286 * @pd: The protection domain to deallocate.
288 * It is an error to call this function while any resources in the pd still
289 * exist. The caller is responsible to synchronously destroy them and
290 * guarantee no new allocations will happen.
292 void ib_dealloc_pd(struct ib_pd
*pd
)
296 if (pd
->__internal_mr
) {
297 ret
= pd
->device
->dereg_mr(pd
->__internal_mr
);
299 pd
->__internal_mr
= NULL
;
302 /* uverbs manipulates usecnt with proper locking, while the kabi
303 requires the caller to guarantee we can't race here. */
304 WARN_ON(atomic_read(&pd
->usecnt
));
306 /* Making delalloc_pd a void return is a WIP, no driver should return
308 ret
= pd
->device
->dealloc_pd(pd
);
309 WARN_ONCE(ret
, "Infiniband HW driver failed dealloc_pd");
311 EXPORT_SYMBOL(ib_dealloc_pd
);
313 /* Address handles */
315 struct ib_ah
*rdma_create_ah(struct ib_pd
*pd
, struct rdma_ah_attr
*ah_attr
)
319 ah
= pd
->device
->create_ah(pd
, ah_attr
, NULL
);
322 ah
->device
= pd
->device
;
325 ah
->type
= ah_attr
->type
;
326 atomic_inc(&pd
->usecnt
);
331 EXPORT_SYMBOL(rdma_create_ah
);
333 int ib_get_rdma_header_version(const union rdma_network_hdr
*hdr
)
335 const struct iphdr
*ip4h
= (struct iphdr
*)&hdr
->roce4grh
;
336 struct iphdr ip4h_checked
;
337 const struct ipv6hdr
*ip6h
= (struct ipv6hdr
*)&hdr
->ibgrh
;
339 /* If it's IPv6, the version must be 6, otherwise, the first
340 * 20 bytes (before the IPv4 header) are garbled.
342 if (ip6h
->version
!= 6)
343 return (ip4h
->version
== 4) ? 4 : 0;
344 /* version may be 6 or 4 because the first 20 bytes could be garbled */
346 /* RoCE v2 requires no options, thus header length
353 * We can't write on scattered buffers so we need to copy to
356 memcpy(&ip4h_checked
, ip4h
, sizeof(ip4h_checked
));
357 ip4h_checked
.check
= 0;
358 ip4h_checked
.check
= ip_fast_csum((u8
*)&ip4h_checked
, 5);
359 /* if IPv4 header checksum is OK, believe it */
360 if (ip4h
->check
== ip4h_checked
.check
)
364 EXPORT_SYMBOL(ib_get_rdma_header_version
);
366 static enum rdma_network_type
ib_get_net_type_by_grh(struct ib_device
*device
,
368 const struct ib_grh
*grh
)
372 if (rdma_protocol_ib(device
, port_num
))
373 return RDMA_NETWORK_IB
;
375 grh_version
= ib_get_rdma_header_version((union rdma_network_hdr
*)grh
);
377 if (grh_version
== 4)
378 return RDMA_NETWORK_IPV4
;
380 if (grh
->next_hdr
== IPPROTO_UDP
)
381 return RDMA_NETWORK_IPV6
;
383 return RDMA_NETWORK_ROCE_V1
;
386 struct find_gid_index_context
{
388 enum ib_gid_type gid_type
;
391 static bool find_gid_index(const union ib_gid
*gid
,
392 const struct ib_gid_attr
*gid_attr
,
395 struct find_gid_index_context
*ctx
=
396 (struct find_gid_index_context
*)context
;
398 if (ctx
->gid_type
!= gid_attr
->gid_type
)
401 if ((!!(ctx
->vlan_id
!= 0xffff) == !is_vlan_dev(gid_attr
->ndev
)) ||
402 (is_vlan_dev(gid_attr
->ndev
) &&
403 vlan_dev_vlan_id(gid_attr
->ndev
) != ctx
->vlan_id
))
409 static int get_sgid_index_from_eth(struct ib_device
*device
, u8 port_num
,
410 u16 vlan_id
, const union ib_gid
*sgid
,
411 enum ib_gid_type gid_type
,
414 struct find_gid_index_context context
= {.vlan_id
= vlan_id
,
415 .gid_type
= gid_type
};
417 return ib_find_gid_by_filter(device
, sgid
, port_num
, find_gid_index
,
418 &context
, gid_index
);
421 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr
*hdr
,
422 enum rdma_network_type net_type
,
423 union ib_gid
*sgid
, union ib_gid
*dgid
)
425 struct sockaddr_in src_in
;
426 struct sockaddr_in dst_in
;
427 __be32 src_saddr
, dst_saddr
;
432 if (net_type
== RDMA_NETWORK_IPV4
) {
433 memcpy(&src_in
.sin_addr
.s_addr
,
434 &hdr
->roce4grh
.saddr
, 4);
435 memcpy(&dst_in
.sin_addr
.s_addr
,
436 &hdr
->roce4grh
.daddr
, 4);
437 src_saddr
= src_in
.sin_addr
.s_addr
;
438 dst_saddr
= dst_in
.sin_addr
.s_addr
;
439 ipv6_addr_set_v4mapped(src_saddr
,
440 (struct in6_addr
*)sgid
);
441 ipv6_addr_set_v4mapped(dst_saddr
,
442 (struct in6_addr
*)dgid
);
444 } else if (net_type
== RDMA_NETWORK_IPV6
||
445 net_type
== RDMA_NETWORK_IB
) {
446 *dgid
= hdr
->ibgrh
.dgid
;
447 *sgid
= hdr
->ibgrh
.sgid
;
453 EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr
);
456 * This function creates ah from the incoming packet.
457 * Incoming packet has dgid of the receiver node on which this code is
458 * getting executed and, sgid contains the GID of the sender.
460 * When resolving mac address of destination, the arrived dgid is used
461 * as sgid and, sgid is used as dgid because sgid contains destinations
462 * GID whom to respond to.
464 * This is why when calling rdma_addr_find_l2_eth_by_grh() function, the
465 * position of arguments dgid and sgid do not match the order of the
468 int ib_init_ah_from_wc(struct ib_device
*device
, u8 port_num
,
469 const struct ib_wc
*wc
, const struct ib_grh
*grh
,
470 struct rdma_ah_attr
*ah_attr
)
475 enum rdma_network_type net_type
= RDMA_NETWORK_IB
;
476 enum ib_gid_type gid_type
= IB_GID_TYPE_IB
;
481 memset(ah_attr
, 0, sizeof *ah_attr
);
482 ah_attr
->type
= rdma_ah_find_type(device
, port_num
);
483 if (rdma_cap_eth_ah(device
, port_num
)) {
484 if (wc
->wc_flags
& IB_WC_WITH_NETWORK_HDR_TYPE
)
485 net_type
= wc
->network_hdr_type
;
487 net_type
= ib_get_net_type_by_grh(device
, port_num
, grh
);
488 gid_type
= ib_network_to_gid_type(net_type
);
490 ret
= ib_get_gids_from_rdma_hdr((union rdma_network_hdr
*)grh
, net_type
,
495 if (rdma_protocol_roce(device
, port_num
)) {
497 u16 vlan_id
= wc
->wc_flags
& IB_WC_WITH_VLAN
?
498 wc
->vlan_id
: 0xffff;
499 struct net_device
*idev
;
500 struct net_device
*resolved_dev
;
502 if (!(wc
->wc_flags
& IB_WC_GRH
))
505 if (!device
->get_netdev
)
508 idev
= device
->get_netdev(device
, port_num
);
512 ret
= rdma_addr_find_l2_eth_by_grh(&dgid
, &sgid
,
514 wc
->wc_flags
& IB_WC_WITH_VLAN
?
516 &if_index
, &hoplimit
);
522 resolved_dev
= dev_get_by_index(&init_net
, if_index
);
524 if (resolved_dev
!= idev
&& !rdma_is_upper_dev_rcu(idev
,
529 dev_put(resolved_dev
);
533 ret
= get_sgid_index_from_eth(device
, port_num
, vlan_id
,
534 &dgid
, gid_type
, &gid_index
);
539 rdma_ah_set_dlid(ah_attr
, wc
->slid
);
540 rdma_ah_set_sl(ah_attr
, wc
->sl
);
541 rdma_ah_set_path_bits(ah_attr
, wc
->dlid_path_bits
);
542 rdma_ah_set_port_num(ah_attr
, port_num
);
544 if (wc
->wc_flags
& IB_WC_GRH
) {
545 if (!rdma_cap_eth_ah(device
, port_num
)) {
546 if (dgid
.global
.interface_id
!= cpu_to_be64(IB_SA_WELL_KNOWN_GUID
)) {
547 ret
= ib_find_cached_gid_by_port(device
, &dgid
,
558 flow_class
= be32_to_cpu(grh
->version_tclass_flow
);
559 rdma_ah_set_grh(ah_attr
, &sgid
,
560 flow_class
& 0xFFFFF,
561 (u8
)gid_index
, hoplimit
,
562 (flow_class
>> 20) & 0xFF);
567 EXPORT_SYMBOL(ib_init_ah_from_wc
);
569 struct ib_ah
*ib_create_ah_from_wc(struct ib_pd
*pd
, const struct ib_wc
*wc
,
570 const struct ib_grh
*grh
, u8 port_num
)
572 struct rdma_ah_attr ah_attr
;
575 ret
= ib_init_ah_from_wc(pd
->device
, port_num
, wc
, grh
, &ah_attr
);
579 return rdma_create_ah(pd
, &ah_attr
);
581 EXPORT_SYMBOL(ib_create_ah_from_wc
);
583 int rdma_modify_ah(struct ib_ah
*ah
, struct rdma_ah_attr
*ah_attr
)
585 if (ah
->type
!= ah_attr
->type
)
588 return ah
->device
->modify_ah
?
589 ah
->device
->modify_ah(ah
, ah_attr
) :
592 EXPORT_SYMBOL(rdma_modify_ah
);
594 int rdma_query_ah(struct ib_ah
*ah
, struct rdma_ah_attr
*ah_attr
)
596 return ah
->device
->query_ah
?
597 ah
->device
->query_ah(ah
, ah_attr
) :
600 EXPORT_SYMBOL(rdma_query_ah
);
602 int rdma_destroy_ah(struct ib_ah
*ah
)
608 ret
= ah
->device
->destroy_ah(ah
);
610 atomic_dec(&pd
->usecnt
);
614 EXPORT_SYMBOL(rdma_destroy_ah
);
616 /* Shared receive queues */
618 struct ib_srq
*ib_create_srq(struct ib_pd
*pd
,
619 struct ib_srq_init_attr
*srq_init_attr
)
623 if (!pd
->device
->create_srq
)
624 return ERR_PTR(-ENOSYS
);
626 srq
= pd
->device
->create_srq(pd
, srq_init_attr
, NULL
);
629 srq
->device
= pd
->device
;
632 srq
->event_handler
= srq_init_attr
->event_handler
;
633 srq
->srq_context
= srq_init_attr
->srq_context
;
634 srq
->srq_type
= srq_init_attr
->srq_type
;
635 if (srq
->srq_type
== IB_SRQT_XRC
) {
636 srq
->ext
.xrc
.xrcd
= srq_init_attr
->ext
.xrc
.xrcd
;
637 srq
->ext
.xrc
.cq
= srq_init_attr
->ext
.xrc
.cq
;
638 atomic_inc(&srq
->ext
.xrc
.xrcd
->usecnt
);
639 atomic_inc(&srq
->ext
.xrc
.cq
->usecnt
);
641 atomic_inc(&pd
->usecnt
);
642 atomic_set(&srq
->usecnt
, 0);
647 EXPORT_SYMBOL(ib_create_srq
);
649 int ib_modify_srq(struct ib_srq
*srq
,
650 struct ib_srq_attr
*srq_attr
,
651 enum ib_srq_attr_mask srq_attr_mask
)
653 return srq
->device
->modify_srq
?
654 srq
->device
->modify_srq(srq
, srq_attr
, srq_attr_mask
, NULL
) :
657 EXPORT_SYMBOL(ib_modify_srq
);
659 int ib_query_srq(struct ib_srq
*srq
,
660 struct ib_srq_attr
*srq_attr
)
662 return srq
->device
->query_srq
?
663 srq
->device
->query_srq(srq
, srq_attr
) : -ENOSYS
;
665 EXPORT_SYMBOL(ib_query_srq
);
667 int ib_destroy_srq(struct ib_srq
*srq
)
670 enum ib_srq_type srq_type
;
671 struct ib_xrcd
*uninitialized_var(xrcd
);
672 struct ib_cq
*uninitialized_var(cq
);
675 if (atomic_read(&srq
->usecnt
))
679 srq_type
= srq
->srq_type
;
680 if (srq_type
== IB_SRQT_XRC
) {
681 xrcd
= srq
->ext
.xrc
.xrcd
;
682 cq
= srq
->ext
.xrc
.cq
;
685 ret
= srq
->device
->destroy_srq(srq
);
687 atomic_dec(&pd
->usecnt
);
688 if (srq_type
== IB_SRQT_XRC
) {
689 atomic_dec(&xrcd
->usecnt
);
690 atomic_dec(&cq
->usecnt
);
696 EXPORT_SYMBOL(ib_destroy_srq
);
700 static void __ib_shared_qp_event_handler(struct ib_event
*event
, void *context
)
702 struct ib_qp
*qp
= context
;
705 spin_lock_irqsave(&qp
->device
->event_handler_lock
, flags
);
706 list_for_each_entry(event
->element
.qp
, &qp
->open_list
, open_list
)
707 if (event
->element
.qp
->event_handler
)
708 event
->element
.qp
->event_handler(event
, event
->element
.qp
->qp_context
);
709 spin_unlock_irqrestore(&qp
->device
->event_handler_lock
, flags
);
712 static void __ib_insert_xrcd_qp(struct ib_xrcd
*xrcd
, struct ib_qp
*qp
)
714 mutex_lock(&xrcd
->tgt_qp_mutex
);
715 list_add(&qp
->xrcd_list
, &xrcd
->tgt_qp_list
);
716 mutex_unlock(&xrcd
->tgt_qp_mutex
);
719 static struct ib_qp
*__ib_open_qp(struct ib_qp
*real_qp
,
720 void (*event_handler
)(struct ib_event
*, void *),
727 qp
= kzalloc(sizeof *qp
, GFP_KERNEL
);
729 return ERR_PTR(-ENOMEM
);
731 qp
->real_qp
= real_qp
;
732 err
= ib_open_shared_qp_security(qp
, real_qp
->device
);
738 qp
->real_qp
= real_qp
;
739 atomic_inc(&real_qp
->usecnt
);
740 qp
->device
= real_qp
->device
;
741 qp
->event_handler
= event_handler
;
742 qp
->qp_context
= qp_context
;
743 qp
->qp_num
= real_qp
->qp_num
;
744 qp
->qp_type
= real_qp
->qp_type
;
746 spin_lock_irqsave(&real_qp
->device
->event_handler_lock
, flags
);
747 list_add(&qp
->open_list
, &real_qp
->open_list
);
748 spin_unlock_irqrestore(&real_qp
->device
->event_handler_lock
, flags
);
753 struct ib_qp
*ib_open_qp(struct ib_xrcd
*xrcd
,
754 struct ib_qp_open_attr
*qp_open_attr
)
756 struct ib_qp
*qp
, *real_qp
;
758 if (qp_open_attr
->qp_type
!= IB_QPT_XRC_TGT
)
759 return ERR_PTR(-EINVAL
);
761 qp
= ERR_PTR(-EINVAL
);
762 mutex_lock(&xrcd
->tgt_qp_mutex
);
763 list_for_each_entry(real_qp
, &xrcd
->tgt_qp_list
, xrcd_list
) {
764 if (real_qp
->qp_num
== qp_open_attr
->qp_num
) {
765 qp
= __ib_open_qp(real_qp
, qp_open_attr
->event_handler
,
766 qp_open_attr
->qp_context
);
770 mutex_unlock(&xrcd
->tgt_qp_mutex
);
773 EXPORT_SYMBOL(ib_open_qp
);
775 static struct ib_qp
*ib_create_xrc_qp(struct ib_qp
*qp
,
776 struct ib_qp_init_attr
*qp_init_attr
)
778 struct ib_qp
*real_qp
= qp
;
780 qp
->event_handler
= __ib_shared_qp_event_handler
;
783 qp
->send_cq
= qp
->recv_cq
= NULL
;
785 qp
->xrcd
= qp_init_attr
->xrcd
;
786 atomic_inc(&qp_init_attr
->xrcd
->usecnt
);
787 INIT_LIST_HEAD(&qp
->open_list
);
789 qp
= __ib_open_qp(real_qp
, qp_init_attr
->event_handler
,
790 qp_init_attr
->qp_context
);
792 __ib_insert_xrcd_qp(qp_init_attr
->xrcd
, real_qp
);
794 real_qp
->device
->destroy_qp(real_qp
);
798 struct ib_qp
*ib_create_qp(struct ib_pd
*pd
,
799 struct ib_qp_init_attr
*qp_init_attr
)
801 struct ib_device
*device
= pd
? pd
->device
: qp_init_attr
->xrcd
->device
;
805 if (qp_init_attr
->rwq_ind_tbl
&&
806 (qp_init_attr
->recv_cq
||
807 qp_init_attr
->srq
|| qp_init_attr
->cap
.max_recv_wr
||
808 qp_init_attr
->cap
.max_recv_sge
))
809 return ERR_PTR(-EINVAL
);
812 * If the callers is using the RDMA API calculate the resources
813 * needed for the RDMA READ/WRITE operations.
815 * Note that these callers need to pass in a port number.
817 if (qp_init_attr
->cap
.max_rdma_ctxs
)
818 rdma_rw_init_qp(device
, qp_init_attr
);
820 qp
= device
->create_qp(pd
, qp_init_attr
, NULL
);
824 ret
= ib_create_qp_security(qp
, device
);
833 qp
->qp_type
= qp_init_attr
->qp_type
;
834 qp
->rwq_ind_tbl
= qp_init_attr
->rwq_ind_tbl
;
836 atomic_set(&qp
->usecnt
, 0);
838 spin_lock_init(&qp
->mr_lock
);
839 INIT_LIST_HEAD(&qp
->rdma_mrs
);
840 INIT_LIST_HEAD(&qp
->sig_mrs
);
842 if (qp_init_attr
->qp_type
== IB_QPT_XRC_TGT
)
843 return ib_create_xrc_qp(qp
, qp_init_attr
);
845 qp
->event_handler
= qp_init_attr
->event_handler
;
846 qp
->qp_context
= qp_init_attr
->qp_context
;
847 if (qp_init_attr
->qp_type
== IB_QPT_XRC_INI
) {
851 qp
->recv_cq
= qp_init_attr
->recv_cq
;
852 if (qp_init_attr
->recv_cq
)
853 atomic_inc(&qp_init_attr
->recv_cq
->usecnt
);
854 qp
->srq
= qp_init_attr
->srq
;
856 atomic_inc(&qp_init_attr
->srq
->usecnt
);
860 qp
->send_cq
= qp_init_attr
->send_cq
;
863 atomic_inc(&pd
->usecnt
);
864 if (qp_init_attr
->send_cq
)
865 atomic_inc(&qp_init_attr
->send_cq
->usecnt
);
866 if (qp_init_attr
->rwq_ind_tbl
)
867 atomic_inc(&qp
->rwq_ind_tbl
->usecnt
);
869 if (qp_init_attr
->cap
.max_rdma_ctxs
) {
870 ret
= rdma_rw_init_mrs(qp
, qp_init_attr
);
872 pr_err("failed to init MR pool ret= %d\n", ret
);
879 * Note: all hw drivers guarantee that max_send_sge is lower than
880 * the device RDMA WRITE SGE limit but not all hw drivers ensure that
881 * max_send_sge <= max_sge_rd.
883 qp
->max_write_sge
= qp_init_attr
->cap
.max_send_sge
;
884 qp
->max_read_sge
= min_t(u32
, qp_init_attr
->cap
.max_send_sge
,
885 device
->attrs
.max_sge_rd
);
889 EXPORT_SYMBOL(ib_create_qp
);
891 static const struct {
893 enum ib_qp_attr_mask req_param
[IB_QPT_MAX
];
894 enum ib_qp_attr_mask opt_param
[IB_QPT_MAX
];
895 } qp_state_table
[IB_QPS_ERR
+ 1][IB_QPS_ERR
+ 1] = {
897 [IB_QPS_RESET
] = { .valid
= 1 },
898 [IB_QPS_ERR
] = { .valid
= 1 },
902 [IB_QPT_UD
] = (IB_QP_PKEY_INDEX
|
905 [IB_QPT_RAW_PACKET
] = IB_QP_PORT
,
906 [IB_QPT_UC
] = (IB_QP_PKEY_INDEX
|
909 [IB_QPT_RC
] = (IB_QP_PKEY_INDEX
|
912 [IB_QPT_XRC_INI
] = (IB_QP_PKEY_INDEX
|
915 [IB_QPT_XRC_TGT
] = (IB_QP_PKEY_INDEX
|
918 [IB_QPT_SMI
] = (IB_QP_PKEY_INDEX
|
920 [IB_QPT_GSI
] = (IB_QP_PKEY_INDEX
|
926 [IB_QPS_RESET
] = { .valid
= 1 },
927 [IB_QPS_ERR
] = { .valid
= 1 },
931 [IB_QPT_UD
] = (IB_QP_PKEY_INDEX
|
934 [IB_QPT_UC
] = (IB_QP_PKEY_INDEX
|
937 [IB_QPT_RC
] = (IB_QP_PKEY_INDEX
|
940 [IB_QPT_XRC_INI
] = (IB_QP_PKEY_INDEX
|
943 [IB_QPT_XRC_TGT
] = (IB_QP_PKEY_INDEX
|
946 [IB_QPT_SMI
] = (IB_QP_PKEY_INDEX
|
948 [IB_QPT_GSI
] = (IB_QP_PKEY_INDEX
|
955 [IB_QPT_UC
] = (IB_QP_AV
|
959 [IB_QPT_RC
] = (IB_QP_AV
|
963 IB_QP_MAX_DEST_RD_ATOMIC
|
964 IB_QP_MIN_RNR_TIMER
),
965 [IB_QPT_XRC_INI
] = (IB_QP_AV
|
969 [IB_QPT_XRC_TGT
] = (IB_QP_AV
|
973 IB_QP_MAX_DEST_RD_ATOMIC
|
974 IB_QP_MIN_RNR_TIMER
),
977 [IB_QPT_UD
] = (IB_QP_PKEY_INDEX
|
979 [IB_QPT_UC
] = (IB_QP_ALT_PATH
|
982 [IB_QPT_RC
] = (IB_QP_ALT_PATH
|
985 [IB_QPT_XRC_INI
] = (IB_QP_ALT_PATH
|
988 [IB_QPT_XRC_TGT
] = (IB_QP_ALT_PATH
|
991 [IB_QPT_SMI
] = (IB_QP_PKEY_INDEX
|
993 [IB_QPT_GSI
] = (IB_QP_PKEY_INDEX
|
999 [IB_QPS_RESET
] = { .valid
= 1 },
1000 [IB_QPS_ERR
] = { .valid
= 1 },
1004 [IB_QPT_UD
] = IB_QP_SQ_PSN
,
1005 [IB_QPT_UC
] = IB_QP_SQ_PSN
,
1006 [IB_QPT_RC
] = (IB_QP_TIMEOUT
|
1010 IB_QP_MAX_QP_RD_ATOMIC
),
1011 [IB_QPT_XRC_INI
] = (IB_QP_TIMEOUT
|
1015 IB_QP_MAX_QP_RD_ATOMIC
),
1016 [IB_QPT_XRC_TGT
] = (IB_QP_TIMEOUT
|
1018 [IB_QPT_SMI
] = IB_QP_SQ_PSN
,
1019 [IB_QPT_GSI
] = IB_QP_SQ_PSN
,
1022 [IB_QPT_UD
] = (IB_QP_CUR_STATE
|
1024 [IB_QPT_UC
] = (IB_QP_CUR_STATE
|
1026 IB_QP_ACCESS_FLAGS
|
1027 IB_QP_PATH_MIG_STATE
),
1028 [IB_QPT_RC
] = (IB_QP_CUR_STATE
|
1030 IB_QP_ACCESS_FLAGS
|
1031 IB_QP_MIN_RNR_TIMER
|
1032 IB_QP_PATH_MIG_STATE
),
1033 [IB_QPT_XRC_INI
] = (IB_QP_CUR_STATE
|
1035 IB_QP_ACCESS_FLAGS
|
1036 IB_QP_PATH_MIG_STATE
),
1037 [IB_QPT_XRC_TGT
] = (IB_QP_CUR_STATE
|
1039 IB_QP_ACCESS_FLAGS
|
1040 IB_QP_MIN_RNR_TIMER
|
1041 IB_QP_PATH_MIG_STATE
),
1042 [IB_QPT_SMI
] = (IB_QP_CUR_STATE
|
1044 [IB_QPT_GSI
] = (IB_QP_CUR_STATE
|
1046 [IB_QPT_RAW_PACKET
] = IB_QP_RATE_LIMIT
,
1051 [IB_QPS_RESET
] = { .valid
= 1 },
1052 [IB_QPS_ERR
] = { .valid
= 1 },
1056 [IB_QPT_UD
] = (IB_QP_CUR_STATE
|
1058 [IB_QPT_UC
] = (IB_QP_CUR_STATE
|
1059 IB_QP_ACCESS_FLAGS
|
1061 IB_QP_PATH_MIG_STATE
),
1062 [IB_QPT_RC
] = (IB_QP_CUR_STATE
|
1063 IB_QP_ACCESS_FLAGS
|
1065 IB_QP_PATH_MIG_STATE
|
1066 IB_QP_MIN_RNR_TIMER
),
1067 [IB_QPT_XRC_INI
] = (IB_QP_CUR_STATE
|
1068 IB_QP_ACCESS_FLAGS
|
1070 IB_QP_PATH_MIG_STATE
),
1071 [IB_QPT_XRC_TGT
] = (IB_QP_CUR_STATE
|
1072 IB_QP_ACCESS_FLAGS
|
1074 IB_QP_PATH_MIG_STATE
|
1075 IB_QP_MIN_RNR_TIMER
),
1076 [IB_QPT_SMI
] = (IB_QP_CUR_STATE
|
1078 [IB_QPT_GSI
] = (IB_QP_CUR_STATE
|
1080 [IB_QPT_RAW_PACKET
] = IB_QP_RATE_LIMIT
,
1086 [IB_QPT_UD
] = IB_QP_EN_SQD_ASYNC_NOTIFY
,
1087 [IB_QPT_UC
] = IB_QP_EN_SQD_ASYNC_NOTIFY
,
1088 [IB_QPT_RC
] = IB_QP_EN_SQD_ASYNC_NOTIFY
,
1089 [IB_QPT_XRC_INI
] = IB_QP_EN_SQD_ASYNC_NOTIFY
,
1090 [IB_QPT_XRC_TGT
] = IB_QP_EN_SQD_ASYNC_NOTIFY
, /* ??? */
1091 [IB_QPT_SMI
] = IB_QP_EN_SQD_ASYNC_NOTIFY
,
1092 [IB_QPT_GSI
] = IB_QP_EN_SQD_ASYNC_NOTIFY
1097 [IB_QPS_RESET
] = { .valid
= 1 },
1098 [IB_QPS_ERR
] = { .valid
= 1 },
1102 [IB_QPT_UD
] = (IB_QP_CUR_STATE
|
1104 [IB_QPT_UC
] = (IB_QP_CUR_STATE
|
1106 IB_QP_ACCESS_FLAGS
|
1107 IB_QP_PATH_MIG_STATE
),
1108 [IB_QPT_RC
] = (IB_QP_CUR_STATE
|
1110 IB_QP_ACCESS_FLAGS
|
1111 IB_QP_MIN_RNR_TIMER
|
1112 IB_QP_PATH_MIG_STATE
),
1113 [IB_QPT_XRC_INI
] = (IB_QP_CUR_STATE
|
1115 IB_QP_ACCESS_FLAGS
|
1116 IB_QP_PATH_MIG_STATE
),
1117 [IB_QPT_XRC_TGT
] = (IB_QP_CUR_STATE
|
1119 IB_QP_ACCESS_FLAGS
|
1120 IB_QP_MIN_RNR_TIMER
|
1121 IB_QP_PATH_MIG_STATE
),
1122 [IB_QPT_SMI
] = (IB_QP_CUR_STATE
|
1124 [IB_QPT_GSI
] = (IB_QP_CUR_STATE
|
1131 [IB_QPT_UD
] = (IB_QP_PKEY_INDEX
|
1133 [IB_QPT_UC
] = (IB_QP_AV
|
1135 IB_QP_ACCESS_FLAGS
|
1137 IB_QP_PATH_MIG_STATE
),
1138 [IB_QPT_RC
] = (IB_QP_PORT
|
1143 IB_QP_MAX_QP_RD_ATOMIC
|
1144 IB_QP_MAX_DEST_RD_ATOMIC
|
1146 IB_QP_ACCESS_FLAGS
|
1148 IB_QP_MIN_RNR_TIMER
|
1149 IB_QP_PATH_MIG_STATE
),
1150 [IB_QPT_XRC_INI
] = (IB_QP_PORT
|
1155 IB_QP_MAX_QP_RD_ATOMIC
|
1157 IB_QP_ACCESS_FLAGS
|
1159 IB_QP_PATH_MIG_STATE
),
1160 [IB_QPT_XRC_TGT
] = (IB_QP_PORT
|
1163 IB_QP_MAX_DEST_RD_ATOMIC
|
1165 IB_QP_ACCESS_FLAGS
|
1167 IB_QP_MIN_RNR_TIMER
|
1168 IB_QP_PATH_MIG_STATE
),
1169 [IB_QPT_SMI
] = (IB_QP_PKEY_INDEX
|
1171 [IB_QPT_GSI
] = (IB_QP_PKEY_INDEX
|
1177 [IB_QPS_RESET
] = { .valid
= 1 },
1178 [IB_QPS_ERR
] = { .valid
= 1 },
1182 [IB_QPT_UD
] = (IB_QP_CUR_STATE
|
1184 [IB_QPT_UC
] = (IB_QP_CUR_STATE
|
1185 IB_QP_ACCESS_FLAGS
),
1186 [IB_QPT_SMI
] = (IB_QP_CUR_STATE
|
1188 [IB_QPT_GSI
] = (IB_QP_CUR_STATE
|
1194 [IB_QPS_RESET
] = { .valid
= 1 },
1195 [IB_QPS_ERR
] = { .valid
= 1 }
1199 int ib_modify_qp_is_ok(enum ib_qp_state cur_state
, enum ib_qp_state next_state
,
1200 enum ib_qp_type type
, enum ib_qp_attr_mask mask
,
1201 enum rdma_link_layer ll
)
1203 enum ib_qp_attr_mask req_param
, opt_param
;
1205 if (cur_state
< 0 || cur_state
> IB_QPS_ERR
||
1206 next_state
< 0 || next_state
> IB_QPS_ERR
)
1209 if (mask
& IB_QP_CUR_STATE
&&
1210 cur_state
!= IB_QPS_RTR
&& cur_state
!= IB_QPS_RTS
&&
1211 cur_state
!= IB_QPS_SQD
&& cur_state
!= IB_QPS_SQE
)
1214 if (!qp_state_table
[cur_state
][next_state
].valid
)
1217 req_param
= qp_state_table
[cur_state
][next_state
].req_param
[type
];
1218 opt_param
= qp_state_table
[cur_state
][next_state
].opt_param
[type
];
1220 if ((mask
& req_param
) != req_param
)
1223 if (mask
& ~(req_param
| opt_param
| IB_QP_STATE
))
1228 EXPORT_SYMBOL(ib_modify_qp_is_ok
);
1230 int ib_resolve_eth_dmac(struct ib_device
*device
,
1231 struct rdma_ah_attr
*ah_attr
)
1234 struct ib_global_route
*grh
;
1236 if (!rdma_is_port_valid(device
, rdma_ah_get_port_num(ah_attr
)))
1239 if (ah_attr
->type
!= RDMA_AH_ATTR_TYPE_ROCE
)
1242 grh
= rdma_ah_retrieve_grh(ah_attr
);
1244 if (rdma_link_local_addr((struct in6_addr
*)grh
->dgid
.raw
)) {
1245 rdma_get_ll_mac((struct in6_addr
*)grh
->dgid
.raw
,
1246 ah_attr
->roce
.dmac
);
1249 struct ib_gid_attr sgid_attr
;
1253 ret
= ib_query_gid(device
,
1254 rdma_ah_get_port_num(ah_attr
),
1258 if (ret
|| !sgid_attr
.ndev
) {
1264 ifindex
= sgid_attr
.ndev
->ifindex
;
1267 rdma_addr_find_l2_eth_by_grh(&sgid
, &grh
->dgid
,
1269 NULL
, &ifindex
, &hop_limit
);
1271 dev_put(sgid_attr
.ndev
);
1273 grh
->hop_limit
= hop_limit
;
1278 EXPORT_SYMBOL(ib_resolve_eth_dmac
);
1281 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP.
1282 * @qp: The QP to modify.
1283 * @attr: On input, specifies the QP attributes to modify. On output,
1284 * the current values of selected QP attributes are returned.
1285 * @attr_mask: A bit-mask used to specify which attributes of the QP
1286 * are being modified.
1287 * @udata: pointer to user's input output buffer information
1288 * are being modified.
1289 * It returns 0 on success and returns appropriate error code on error.
1291 int ib_modify_qp_with_udata(struct ib_qp
*qp
, struct ib_qp_attr
*attr
,
1292 int attr_mask
, struct ib_udata
*udata
)
1296 if (attr_mask
& IB_QP_AV
) {
1297 ret
= ib_resolve_eth_dmac(qp
->device
, &attr
->ah_attr
);
1301 return ib_security_modify_qp(qp
, attr
, attr_mask
, udata
);
1303 EXPORT_SYMBOL(ib_modify_qp_with_udata
);
1305 int ib_modify_qp(struct ib_qp
*qp
,
1306 struct ib_qp_attr
*qp_attr
,
1309 return ib_modify_qp_with_udata(qp
, qp_attr
, qp_attr_mask
, NULL
);
1311 EXPORT_SYMBOL(ib_modify_qp
);
1313 int ib_query_qp(struct ib_qp
*qp
,
1314 struct ib_qp_attr
*qp_attr
,
1316 struct ib_qp_init_attr
*qp_init_attr
)
1318 return qp
->device
->query_qp
?
1319 qp
->device
->query_qp(qp
->real_qp
, qp_attr
, qp_attr_mask
, qp_init_attr
) :
1322 EXPORT_SYMBOL(ib_query_qp
);
1324 int ib_close_qp(struct ib_qp
*qp
)
1326 struct ib_qp
*real_qp
;
1327 unsigned long flags
;
1329 real_qp
= qp
->real_qp
;
1333 spin_lock_irqsave(&real_qp
->device
->event_handler_lock
, flags
);
1334 list_del(&qp
->open_list
);
1335 spin_unlock_irqrestore(&real_qp
->device
->event_handler_lock
, flags
);
1337 atomic_dec(&real_qp
->usecnt
);
1338 ib_close_shared_qp_security(qp
->qp_sec
);
1343 EXPORT_SYMBOL(ib_close_qp
);
1345 static int __ib_destroy_shared_qp(struct ib_qp
*qp
)
1347 struct ib_xrcd
*xrcd
;
1348 struct ib_qp
*real_qp
;
1351 real_qp
= qp
->real_qp
;
1352 xrcd
= real_qp
->xrcd
;
1354 mutex_lock(&xrcd
->tgt_qp_mutex
);
1356 if (atomic_read(&real_qp
->usecnt
) == 0)
1357 list_del(&real_qp
->xrcd_list
);
1360 mutex_unlock(&xrcd
->tgt_qp_mutex
);
1363 ret
= ib_destroy_qp(real_qp
);
1365 atomic_dec(&xrcd
->usecnt
);
1367 __ib_insert_xrcd_qp(xrcd
, real_qp
);
1373 int ib_destroy_qp(struct ib_qp
*qp
)
1376 struct ib_cq
*scq
, *rcq
;
1378 struct ib_rwq_ind_table
*ind_tbl
;
1379 struct ib_qp_security
*sec
;
1382 WARN_ON_ONCE(qp
->mrs_used
> 0);
1384 if (atomic_read(&qp
->usecnt
))
1387 if (qp
->real_qp
!= qp
)
1388 return __ib_destroy_shared_qp(qp
);
1394 ind_tbl
= qp
->rwq_ind_tbl
;
1397 ib_destroy_qp_security_begin(sec
);
1400 rdma_rw_cleanup_mrs(qp
);
1402 ret
= qp
->device
->destroy_qp(qp
);
1405 atomic_dec(&pd
->usecnt
);
1407 atomic_dec(&scq
->usecnt
);
1409 atomic_dec(&rcq
->usecnt
);
1411 atomic_dec(&srq
->usecnt
);
1413 atomic_dec(&ind_tbl
->usecnt
);
1415 ib_destroy_qp_security_end(sec
);
1418 ib_destroy_qp_security_abort(sec
);
1423 EXPORT_SYMBOL(ib_destroy_qp
);
1425 /* Completion queues */
1427 struct ib_cq
*ib_create_cq(struct ib_device
*device
,
1428 ib_comp_handler comp_handler
,
1429 void (*event_handler
)(struct ib_event
*, void *),
1431 const struct ib_cq_init_attr
*cq_attr
)
1435 cq
= device
->create_cq(device
, cq_attr
, NULL
, NULL
);
1438 cq
->device
= device
;
1440 cq
->comp_handler
= comp_handler
;
1441 cq
->event_handler
= event_handler
;
1442 cq
->cq_context
= cq_context
;
1443 atomic_set(&cq
->usecnt
, 0);
1448 EXPORT_SYMBOL(ib_create_cq
);
1450 int ib_modify_cq(struct ib_cq
*cq
, u16 cq_count
, u16 cq_period
)
1452 return cq
->device
->modify_cq
?
1453 cq
->device
->modify_cq(cq
, cq_count
, cq_period
) : -ENOSYS
;
1455 EXPORT_SYMBOL(ib_modify_cq
);
1457 int ib_destroy_cq(struct ib_cq
*cq
)
1459 if (atomic_read(&cq
->usecnt
))
1462 return cq
->device
->destroy_cq(cq
);
1464 EXPORT_SYMBOL(ib_destroy_cq
);
1466 int ib_resize_cq(struct ib_cq
*cq
, int cqe
)
1468 return cq
->device
->resize_cq
?
1469 cq
->device
->resize_cq(cq
, cqe
, NULL
) : -ENOSYS
;
1471 EXPORT_SYMBOL(ib_resize_cq
);
1473 /* Memory regions */
1475 int ib_dereg_mr(struct ib_mr
*mr
)
1477 struct ib_pd
*pd
= mr
->pd
;
1480 ret
= mr
->device
->dereg_mr(mr
);
1482 atomic_dec(&pd
->usecnt
);
1486 EXPORT_SYMBOL(ib_dereg_mr
);
1489 * ib_alloc_mr() - Allocates a memory region
1490 * @pd: protection domain associated with the region
1491 * @mr_type: memory region type
1492 * @max_num_sg: maximum sg entries available for registration.
1495 * Memory registeration page/sg lists must not exceed max_num_sg.
1496 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
1497 * max_num_sg * used_page_size.
1500 struct ib_mr
*ib_alloc_mr(struct ib_pd
*pd
,
1501 enum ib_mr_type mr_type
,
1506 if (!pd
->device
->alloc_mr
)
1507 return ERR_PTR(-ENOSYS
);
1509 mr
= pd
->device
->alloc_mr(pd
, mr_type
, max_num_sg
);
1511 mr
->device
= pd
->device
;
1514 atomic_inc(&pd
->usecnt
);
1515 mr
->need_inval
= false;
1520 EXPORT_SYMBOL(ib_alloc_mr
);
1522 /* "Fast" memory regions */
1524 struct ib_fmr
*ib_alloc_fmr(struct ib_pd
*pd
,
1525 int mr_access_flags
,
1526 struct ib_fmr_attr
*fmr_attr
)
1530 if (!pd
->device
->alloc_fmr
)
1531 return ERR_PTR(-ENOSYS
);
1533 fmr
= pd
->device
->alloc_fmr(pd
, mr_access_flags
, fmr_attr
);
1535 fmr
->device
= pd
->device
;
1537 atomic_inc(&pd
->usecnt
);
1542 EXPORT_SYMBOL(ib_alloc_fmr
);
1544 int ib_unmap_fmr(struct list_head
*fmr_list
)
1548 if (list_empty(fmr_list
))
1551 fmr
= list_entry(fmr_list
->next
, struct ib_fmr
, list
);
1552 return fmr
->device
->unmap_fmr(fmr_list
);
1554 EXPORT_SYMBOL(ib_unmap_fmr
);
1556 int ib_dealloc_fmr(struct ib_fmr
*fmr
)
1562 ret
= fmr
->device
->dealloc_fmr(fmr
);
1564 atomic_dec(&pd
->usecnt
);
1568 EXPORT_SYMBOL(ib_dealloc_fmr
);
1570 /* Multicast groups */
1572 static bool is_valid_mcast_lid(struct ib_qp
*qp
, u16 lid
)
1574 struct ib_qp_init_attr init_attr
= {};
1575 struct ib_qp_attr attr
= {};
1576 int num_eth_ports
= 0;
1579 /* If QP state >= init, it is assigned to a port and we can check this
1582 if (!ib_query_qp(qp
, &attr
, IB_QP_STATE
| IB_QP_PORT
, &init_attr
)) {
1583 if (attr
.qp_state
>= IB_QPS_INIT
) {
1584 if (qp
->device
->get_link_layer(qp
->device
, attr
.port_num
) !=
1585 IB_LINK_LAYER_INFINIBAND
)
1591 /* Can't get a quick answer, iterate over all ports */
1592 for (port
= 0; port
< qp
->device
->phys_port_cnt
; port
++)
1593 if (qp
->device
->get_link_layer(qp
->device
, port
) !=
1594 IB_LINK_LAYER_INFINIBAND
)
1597 /* If we have at lease one Ethernet port, RoCE annex declares that
1598 * multicast LID should be ignored. We can't tell at this step if the
1599 * QP belongs to an IB or Ethernet port.
1604 /* If all the ports are IB, we can check according to IB spec. */
1606 return !(lid
< be16_to_cpu(IB_MULTICAST_LID_BASE
) ||
1607 lid
== be16_to_cpu(IB_LID_PERMISSIVE
));
1610 int ib_attach_mcast(struct ib_qp
*qp
, union ib_gid
*gid
, u16 lid
)
1614 if (!qp
->device
->attach_mcast
)
1617 if (!rdma_is_multicast_addr((struct in6_addr
*)gid
->raw
) ||
1618 qp
->qp_type
!= IB_QPT_UD
|| !is_valid_mcast_lid(qp
, lid
))
1621 ret
= qp
->device
->attach_mcast(qp
, gid
, lid
);
1623 atomic_inc(&qp
->usecnt
);
1626 EXPORT_SYMBOL(ib_attach_mcast
);
1628 int ib_detach_mcast(struct ib_qp
*qp
, union ib_gid
*gid
, u16 lid
)
1632 if (!qp
->device
->detach_mcast
)
1635 if (!rdma_is_multicast_addr((struct in6_addr
*)gid
->raw
) ||
1636 qp
->qp_type
!= IB_QPT_UD
|| !is_valid_mcast_lid(qp
, lid
))
1639 ret
= qp
->device
->detach_mcast(qp
, gid
, lid
);
1641 atomic_dec(&qp
->usecnt
);
1644 EXPORT_SYMBOL(ib_detach_mcast
);
1646 struct ib_xrcd
*ib_alloc_xrcd(struct ib_device
*device
)
1648 struct ib_xrcd
*xrcd
;
1650 if (!device
->alloc_xrcd
)
1651 return ERR_PTR(-ENOSYS
);
1653 xrcd
= device
->alloc_xrcd(device
, NULL
, NULL
);
1654 if (!IS_ERR(xrcd
)) {
1655 xrcd
->device
= device
;
1657 atomic_set(&xrcd
->usecnt
, 0);
1658 mutex_init(&xrcd
->tgt_qp_mutex
);
1659 INIT_LIST_HEAD(&xrcd
->tgt_qp_list
);
1664 EXPORT_SYMBOL(ib_alloc_xrcd
);
1666 int ib_dealloc_xrcd(struct ib_xrcd
*xrcd
)
1671 if (atomic_read(&xrcd
->usecnt
))
1674 while (!list_empty(&xrcd
->tgt_qp_list
)) {
1675 qp
= list_entry(xrcd
->tgt_qp_list
.next
, struct ib_qp
, xrcd_list
);
1676 ret
= ib_destroy_qp(qp
);
1681 return xrcd
->device
->dealloc_xrcd(xrcd
);
1683 EXPORT_SYMBOL(ib_dealloc_xrcd
);
1686 * ib_create_wq - Creates a WQ associated with the specified protection
1688 * @pd: The protection domain associated with the WQ.
1689 * @wq_init_attr: A list of initial attributes required to create the
1690 * WQ. If WQ creation succeeds, then the attributes are updated to
1691 * the actual capabilities of the created WQ.
1693 * wq_init_attr->max_wr and wq_init_attr->max_sge determine
1694 * the requested size of the WQ, and set to the actual values allocated
1696 * If ib_create_wq() succeeds, then max_wr and max_sge will always be
1697 * at least as large as the requested values.
1699 struct ib_wq
*ib_create_wq(struct ib_pd
*pd
,
1700 struct ib_wq_init_attr
*wq_attr
)
1704 if (!pd
->device
->create_wq
)
1705 return ERR_PTR(-ENOSYS
);
1707 wq
= pd
->device
->create_wq(pd
, wq_attr
, NULL
);
1709 wq
->event_handler
= wq_attr
->event_handler
;
1710 wq
->wq_context
= wq_attr
->wq_context
;
1711 wq
->wq_type
= wq_attr
->wq_type
;
1712 wq
->cq
= wq_attr
->cq
;
1713 wq
->device
= pd
->device
;
1716 atomic_inc(&pd
->usecnt
);
1717 atomic_inc(&wq_attr
->cq
->usecnt
);
1718 atomic_set(&wq
->usecnt
, 0);
1722 EXPORT_SYMBOL(ib_create_wq
);
1725 * ib_destroy_wq - Destroys the specified WQ.
1726 * @wq: The WQ to destroy.
1728 int ib_destroy_wq(struct ib_wq
*wq
)
1731 struct ib_cq
*cq
= wq
->cq
;
1732 struct ib_pd
*pd
= wq
->pd
;
1734 if (atomic_read(&wq
->usecnt
))
1737 err
= wq
->device
->destroy_wq(wq
);
1739 atomic_dec(&pd
->usecnt
);
1740 atomic_dec(&cq
->usecnt
);
1744 EXPORT_SYMBOL(ib_destroy_wq
);
1747 * ib_modify_wq - Modifies the specified WQ.
1748 * @wq: The WQ to modify.
1749 * @wq_attr: On input, specifies the WQ attributes to modify.
1750 * @wq_attr_mask: A bit-mask used to specify which attributes of the WQ
1751 * are being modified.
1752 * On output, the current values of selected WQ attributes are returned.
1754 int ib_modify_wq(struct ib_wq
*wq
, struct ib_wq_attr
*wq_attr
,
1759 if (!wq
->device
->modify_wq
)
1762 err
= wq
->device
->modify_wq(wq
, wq_attr
, wq_attr_mask
, NULL
);
1765 EXPORT_SYMBOL(ib_modify_wq
);
1768 * ib_create_rwq_ind_table - Creates a RQ Indirection Table.
1769 * @device: The device on which to create the rwq indirection table.
1770 * @ib_rwq_ind_table_init_attr: A list of initial attributes required to
1771 * create the Indirection Table.
1773 * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less
1774 * than the created ib_rwq_ind_table object and the caller is responsible
1775 * for its memory allocation/free.
1777 struct ib_rwq_ind_table
*ib_create_rwq_ind_table(struct ib_device
*device
,
1778 struct ib_rwq_ind_table_init_attr
*init_attr
)
1780 struct ib_rwq_ind_table
*rwq_ind_table
;
1784 if (!device
->create_rwq_ind_table
)
1785 return ERR_PTR(-ENOSYS
);
1787 table_size
= (1 << init_attr
->log_ind_tbl_size
);
1788 rwq_ind_table
= device
->create_rwq_ind_table(device
,
1790 if (IS_ERR(rwq_ind_table
))
1791 return rwq_ind_table
;
1793 rwq_ind_table
->ind_tbl
= init_attr
->ind_tbl
;
1794 rwq_ind_table
->log_ind_tbl_size
= init_attr
->log_ind_tbl_size
;
1795 rwq_ind_table
->device
= device
;
1796 rwq_ind_table
->uobject
= NULL
;
1797 atomic_set(&rwq_ind_table
->usecnt
, 0);
1799 for (i
= 0; i
< table_size
; i
++)
1800 atomic_inc(&rwq_ind_table
->ind_tbl
[i
]->usecnt
);
1802 return rwq_ind_table
;
1804 EXPORT_SYMBOL(ib_create_rwq_ind_table
);
1807 * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table.
1808 * @wq_ind_table: The Indirection Table to destroy.
1810 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table
*rwq_ind_table
)
1813 u32 table_size
= (1 << rwq_ind_table
->log_ind_tbl_size
);
1814 struct ib_wq
**ind_tbl
= rwq_ind_table
->ind_tbl
;
1816 if (atomic_read(&rwq_ind_table
->usecnt
))
1819 err
= rwq_ind_table
->device
->destroy_rwq_ind_table(rwq_ind_table
);
1821 for (i
= 0; i
< table_size
; i
++)
1822 atomic_dec(&ind_tbl
[i
]->usecnt
);
1827 EXPORT_SYMBOL(ib_destroy_rwq_ind_table
);
1829 struct ib_flow
*ib_create_flow(struct ib_qp
*qp
,
1830 struct ib_flow_attr
*flow_attr
,
1833 struct ib_flow
*flow_id
;
1834 if (!qp
->device
->create_flow
)
1835 return ERR_PTR(-ENOSYS
);
1837 flow_id
= qp
->device
->create_flow(qp
, flow_attr
, domain
);
1838 if (!IS_ERR(flow_id
)) {
1839 atomic_inc(&qp
->usecnt
);
1844 EXPORT_SYMBOL(ib_create_flow
);
1846 int ib_destroy_flow(struct ib_flow
*flow_id
)
1849 struct ib_qp
*qp
= flow_id
->qp
;
1851 err
= qp
->device
->destroy_flow(flow_id
);
1853 atomic_dec(&qp
->usecnt
);
1856 EXPORT_SYMBOL(ib_destroy_flow
);
1858 int ib_check_mr_status(struct ib_mr
*mr
, u32 check_mask
,
1859 struct ib_mr_status
*mr_status
)
1861 return mr
->device
->check_mr_status
?
1862 mr
->device
->check_mr_status(mr
, check_mask
, mr_status
) : -ENOSYS
;
1864 EXPORT_SYMBOL(ib_check_mr_status
);
1866 int ib_set_vf_link_state(struct ib_device
*device
, int vf
, u8 port
,
1869 if (!device
->set_vf_link_state
)
1872 return device
->set_vf_link_state(device
, vf
, port
, state
);
1874 EXPORT_SYMBOL(ib_set_vf_link_state
);
1876 int ib_get_vf_config(struct ib_device
*device
, int vf
, u8 port
,
1877 struct ifla_vf_info
*info
)
1879 if (!device
->get_vf_config
)
1882 return device
->get_vf_config(device
, vf
, port
, info
);
1884 EXPORT_SYMBOL(ib_get_vf_config
);
1886 int ib_get_vf_stats(struct ib_device
*device
, int vf
, u8 port
,
1887 struct ifla_vf_stats
*stats
)
1889 if (!device
->get_vf_stats
)
1892 return device
->get_vf_stats(device
, vf
, port
, stats
);
1894 EXPORT_SYMBOL(ib_get_vf_stats
);
1896 int ib_set_vf_guid(struct ib_device
*device
, int vf
, u8 port
, u64 guid
,
1899 if (!device
->set_vf_guid
)
1902 return device
->set_vf_guid(device
, vf
, port
, guid
, type
);
1904 EXPORT_SYMBOL(ib_set_vf_guid
);
1907 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
1908 * and set it the memory region.
1909 * @mr: memory region
1910 * @sg: dma mapped scatterlist
1911 * @sg_nents: number of entries in sg
1912 * @sg_offset: offset in bytes into sg
1913 * @page_size: page vector desired page size
1916 * - The first sg element is allowed to have an offset.
1917 * - Each sg element must either be aligned to page_size or virtually
1918 * contiguous to the previous element. In case an sg element has a
1919 * non-contiguous offset, the mapping prefix will not include it.
1920 * - The last sg element is allowed to have length less than page_size.
1921 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size
1922 * then only max_num_sg entries will be mapped.
1923 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
1924 * constraints holds and the page_size argument is ignored.
1926 * Returns the number of sg elements that were mapped to the memory region.
1928 * After this completes successfully, the memory region
1929 * is ready for registration.
1931 int ib_map_mr_sg(struct ib_mr
*mr
, struct scatterlist
*sg
, int sg_nents
,
1932 unsigned int *sg_offset
, unsigned int page_size
)
1934 if (unlikely(!mr
->device
->map_mr_sg
))
1937 mr
->page_size
= page_size
;
1939 return mr
->device
->map_mr_sg(mr
, sg
, sg_nents
, sg_offset
);
1941 EXPORT_SYMBOL(ib_map_mr_sg
);
1944 * ib_sg_to_pages() - Convert the largest prefix of a sg list
1946 * @mr: memory region
1947 * @sgl: dma mapped scatterlist
1948 * @sg_nents: number of entries in sg
1949 * @sg_offset_p: IN: start offset in bytes into sg
1950 * OUT: offset in bytes for element n of the sg of the first
1951 * byte that has not been processed where n is the return
1952 * value of this function.
1953 * @set_page: driver page assignment function pointer
1955 * Core service helper for drivers to convert the largest
1956 * prefix of given sg list to a page vector. The sg list
1957 * prefix converted is the prefix that meet the requirements
1960 * Returns the number of sg elements that were assigned to
1963 int ib_sg_to_pages(struct ib_mr
*mr
, struct scatterlist
*sgl
, int sg_nents
,
1964 unsigned int *sg_offset_p
, int (*set_page
)(struct ib_mr
*, u64
))
1966 struct scatterlist
*sg
;
1967 u64 last_end_dma_addr
= 0;
1968 unsigned int sg_offset
= sg_offset_p
? *sg_offset_p
: 0;
1969 unsigned int last_page_off
= 0;
1970 u64 page_mask
= ~((u64
)mr
->page_size
- 1);
1973 if (unlikely(sg_nents
<= 0 || sg_offset
> sg_dma_len(&sgl
[0])))
1976 mr
->iova
= sg_dma_address(&sgl
[0]) + sg_offset
;
1979 for_each_sg(sgl
, sg
, sg_nents
, i
) {
1980 u64 dma_addr
= sg_dma_address(sg
) + sg_offset
;
1981 u64 prev_addr
= dma_addr
;
1982 unsigned int dma_len
= sg_dma_len(sg
) - sg_offset
;
1983 u64 end_dma_addr
= dma_addr
+ dma_len
;
1984 u64 page_addr
= dma_addr
& page_mask
;
1987 * For the second and later elements, check whether either the
1988 * end of element i-1 or the start of element i is not aligned
1989 * on a page boundary.
1991 if (i
&& (last_page_off
!= 0 || page_addr
!= dma_addr
)) {
1992 /* Stop mapping if there is a gap. */
1993 if (last_end_dma_addr
!= dma_addr
)
1997 * Coalesce this element with the last. If it is small
1998 * enough just update mr->length. Otherwise start
1999 * mapping from the next page.
2005 ret
= set_page(mr
, page_addr
);
2006 if (unlikely(ret
< 0)) {
2007 sg_offset
= prev_addr
- sg_dma_address(sg
);
2008 mr
->length
+= prev_addr
- dma_addr
;
2010 *sg_offset_p
= sg_offset
;
2011 return i
|| sg_offset
? i
: ret
;
2013 prev_addr
= page_addr
;
2015 page_addr
+= mr
->page_size
;
2016 } while (page_addr
< end_dma_addr
);
2018 mr
->length
+= dma_len
;
2019 last_end_dma_addr
= end_dma_addr
;
2020 last_page_off
= end_dma_addr
& ~page_mask
;
2029 EXPORT_SYMBOL(ib_sg_to_pages
);
2031 struct ib_drain_cqe
{
2033 struct completion done
;
2036 static void ib_drain_qp_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
2038 struct ib_drain_cqe
*cqe
= container_of(wc
->wr_cqe
, struct ib_drain_cqe
,
2041 complete(&cqe
->done
);
2045 * Post a WR and block until its completion is reaped for the SQ.
2047 static void __ib_drain_sq(struct ib_qp
*qp
)
2049 struct ib_cq
*cq
= qp
->send_cq
;
2050 struct ib_qp_attr attr
= { .qp_state
= IB_QPS_ERR
};
2051 struct ib_drain_cqe sdrain
;
2052 struct ib_send_wr swr
= {}, *bad_swr
;
2055 swr
.wr_cqe
= &sdrain
.cqe
;
2056 sdrain
.cqe
.done
= ib_drain_qp_done
;
2057 init_completion(&sdrain
.done
);
2059 ret
= ib_modify_qp(qp
, &attr
, IB_QP_STATE
);
2061 WARN_ONCE(ret
, "failed to drain send queue: %d\n", ret
);
2065 ret
= ib_post_send(qp
, &swr
, &bad_swr
);
2067 WARN_ONCE(ret
, "failed to drain send queue: %d\n", ret
);
2071 if (cq
->poll_ctx
== IB_POLL_DIRECT
)
2072 while (wait_for_completion_timeout(&sdrain
.done
, HZ
/ 10) <= 0)
2073 ib_process_cq_direct(cq
, -1);
2075 wait_for_completion(&sdrain
.done
);
2079 * Post a WR and block until its completion is reaped for the RQ.
2081 static void __ib_drain_rq(struct ib_qp
*qp
)
2083 struct ib_cq
*cq
= qp
->recv_cq
;
2084 struct ib_qp_attr attr
= { .qp_state
= IB_QPS_ERR
};
2085 struct ib_drain_cqe rdrain
;
2086 struct ib_recv_wr rwr
= {}, *bad_rwr
;
2089 rwr
.wr_cqe
= &rdrain
.cqe
;
2090 rdrain
.cqe
.done
= ib_drain_qp_done
;
2091 init_completion(&rdrain
.done
);
2093 ret
= ib_modify_qp(qp
, &attr
, IB_QP_STATE
);
2095 WARN_ONCE(ret
, "failed to drain recv queue: %d\n", ret
);
2099 ret
= ib_post_recv(qp
, &rwr
, &bad_rwr
);
2101 WARN_ONCE(ret
, "failed to drain recv queue: %d\n", ret
);
2105 if (cq
->poll_ctx
== IB_POLL_DIRECT
)
2106 while (wait_for_completion_timeout(&rdrain
.done
, HZ
/ 10) <= 0)
2107 ib_process_cq_direct(cq
, -1);
2109 wait_for_completion(&rdrain
.done
);
2113 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the
2115 * @qp: queue pair to drain
2117 * If the device has a provider-specific drain function, then
2118 * call that. Otherwise call the generic drain function
2123 * ensure there is room in the CQ and SQ for the drain work request and
2126 * allocate the CQ using ib_alloc_cq().
2128 * ensure that there are no other contexts that are posting WRs concurrently.
2129 * Otherwise the drain is not guaranteed.
2131 void ib_drain_sq(struct ib_qp
*qp
)
2133 if (qp
->device
->drain_sq
)
2134 qp
->device
->drain_sq(qp
);
2138 EXPORT_SYMBOL(ib_drain_sq
);
2141 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the
2143 * @qp: queue pair to drain
2145 * If the device has a provider-specific drain function, then
2146 * call that. Otherwise call the generic drain function
2151 * ensure there is room in the CQ and RQ for the drain work request and
2154 * allocate the CQ using ib_alloc_cq().
2156 * ensure that there are no other contexts that are posting WRs concurrently.
2157 * Otherwise the drain is not guaranteed.
2159 void ib_drain_rq(struct ib_qp
*qp
)
2161 if (qp
->device
->drain_rq
)
2162 qp
->device
->drain_rq(qp
);
2166 EXPORT_SYMBOL(ib_drain_rq
);
2169 * ib_drain_qp() - Block until all CQEs have been consumed by the
2170 * application on both the RQ and SQ.
2171 * @qp: queue pair to drain
2175 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests
2178 * allocate the CQs using ib_alloc_cq().
2180 * ensure that there are no other contexts that are posting WRs concurrently.
2181 * Otherwise the drain is not guaranteed.
2183 void ib_drain_qp(struct ib_qp
*qp
)
2189 EXPORT_SYMBOL(ib_drain_qp
);