2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
4 * Copyright (c) 2006 Intel Corporation. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/err.h>
38 #include <linux/random.h>
39 #include <linux/spinlock.h>
40 #include <linux/slab.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/kref.h>
43 #include <linux/xarray.h>
44 #include <linux/workqueue.h>
45 #include <uapi/linux/if_ether.h>
46 #include <rdma/ib_pack.h>
47 #include <rdma/ib_cache.h>
48 #include <rdma/rdma_netlink.h>
49 #include <net/netlink.h>
50 #include <uapi/rdma/ib_user_sa.h>
51 #include <rdma/ib_marshall.h>
52 #include <rdma/ib_addr.h>
53 #include <rdma/opa_addr.h>
55 #include "core_priv.h"
57 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100
58 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000
59 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000
60 #define IB_SA_CPI_MAX_RETRY_CNT 3
61 #define IB_SA_CPI_RETRY_WAIT 1000 /*msecs */
62 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
71 enum rdma_class_port_info_type {
72 RDMA_CLASS_PORT_INFO_IB,
73 RDMA_CLASS_PORT_INFO_OPA
76 struct rdma_class_port_info {
77 enum rdma_class_port_info_type type;
79 struct ib_class_port_info ib;
80 struct opa_class_port_info opa;
84 struct ib_sa_classport_cache {
87 struct rdma_class_port_info data;
91 struct ib_mad_agent *agent;
92 struct ib_sa_sm_ah *sm_ah;
93 struct work_struct update_task;
94 struct ib_sa_classport_cache classport_info;
95 struct delayed_work ib_cpi_work;
96 spinlock_t classport_lock; /* protects class port info set */
101 struct ib_sa_device {
102 int start_port, end_port;
103 struct ib_event_handler event_handler;
104 struct ib_sa_port port[];
108 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
109 void (*release)(struct ib_sa_query *);
110 struct ib_sa_client *client;
111 struct ib_sa_port *port;
112 struct ib_mad_send_buf *mad_buf;
113 struct ib_sa_sm_ah *sm_ah;
116 struct list_head list; /* Local svc request list */
117 u32 seq; /* Local svc request sequence number */
118 unsigned long timeout; /* Local svc timeout */
119 u8 path_use; /* How will the pathrecord be used */
122 #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
123 #define IB_SA_CANCEL 0x00000002
124 #define IB_SA_QUERY_OPA 0x00000004
126 struct ib_sa_service_query {
127 void (*callback)(int, struct ib_sa_service_rec *, void *);
129 struct ib_sa_query sa_query;
132 struct ib_sa_path_query {
133 void (*callback)(int, struct sa_path_rec *, void *);
135 struct ib_sa_query sa_query;
136 struct sa_path_rec *conv_pr;
139 struct ib_sa_guidinfo_query {
140 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
142 struct ib_sa_query sa_query;
145 struct ib_sa_classport_info_query {
146 void (*callback)(void *);
148 struct ib_sa_query sa_query;
151 struct ib_sa_mcmember_query {
152 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
154 struct ib_sa_query sa_query;
157 static LIST_HEAD(ib_nl_request_list);
158 static DEFINE_SPINLOCK(ib_nl_request_lock);
159 static atomic_t ib_nl_sa_request_seq;
160 static struct workqueue_struct *ib_nl_wq;
161 static struct delayed_work ib_nl_timed_work;
162 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
163 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
164 .len = sizeof(struct ib_path_rec_data)},
165 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
166 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
167 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
168 .len = sizeof(struct rdma_nla_ls_gid)},
169 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
170 .len = sizeof(struct rdma_nla_ls_gid)},
171 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
172 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
173 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
177 static int ib_sa_add_one(struct ib_device *device);
178 static void ib_sa_remove_one(struct ib_device *device, void *client_data);
180 static struct ib_client sa_client = {
182 .add = ib_sa_add_one,
183 .remove = ib_sa_remove_one
186 static DEFINE_XARRAY_FLAGS(queries, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
188 static DEFINE_SPINLOCK(tid_lock);
191 #define PATH_REC_FIELD(field) \
192 .struct_offset_bytes = offsetof(struct sa_path_rec, field), \
193 .struct_size_bytes = sizeof_field(struct sa_path_rec, field), \
194 .field_name = "sa_path_rec:" #field
196 static const struct ib_field path_rec_table[] = {
197 { PATH_REC_FIELD(service_id),
201 { PATH_REC_FIELD(dgid),
205 { PATH_REC_FIELD(sgid),
209 { PATH_REC_FIELD(ib.dlid),
213 { PATH_REC_FIELD(ib.slid),
217 { PATH_REC_FIELD(ib.raw_traffic),
225 { PATH_REC_FIELD(flow_label),
229 { PATH_REC_FIELD(hop_limit),
233 { PATH_REC_FIELD(traffic_class),
237 { PATH_REC_FIELD(reversible),
241 { PATH_REC_FIELD(numb_path),
245 { PATH_REC_FIELD(pkey),
249 { PATH_REC_FIELD(qos_class),
253 { PATH_REC_FIELD(sl),
257 { PATH_REC_FIELD(mtu_selector),
261 { PATH_REC_FIELD(mtu),
265 { PATH_REC_FIELD(rate_selector),
269 { PATH_REC_FIELD(rate),
273 { PATH_REC_FIELD(packet_life_time_selector),
277 { PATH_REC_FIELD(packet_life_time),
281 { PATH_REC_FIELD(preference),
291 #define OPA_PATH_REC_FIELD(field) \
292 .struct_offset_bytes = \
293 offsetof(struct sa_path_rec, field), \
294 .struct_size_bytes = \
295 sizeof_field(struct sa_path_rec, field), \
296 .field_name = "sa_path_rec:" #field
298 static const struct ib_field opa_path_rec_table[] = {
299 { OPA_PATH_REC_FIELD(service_id),
303 { OPA_PATH_REC_FIELD(dgid),
307 { OPA_PATH_REC_FIELD(sgid),
311 { OPA_PATH_REC_FIELD(opa.dlid),
315 { OPA_PATH_REC_FIELD(opa.slid),
319 { OPA_PATH_REC_FIELD(opa.raw_traffic),
327 { OPA_PATH_REC_FIELD(flow_label),
331 { OPA_PATH_REC_FIELD(hop_limit),
335 { OPA_PATH_REC_FIELD(traffic_class),
339 { OPA_PATH_REC_FIELD(reversible),
343 { OPA_PATH_REC_FIELD(numb_path),
347 { OPA_PATH_REC_FIELD(pkey),
351 { OPA_PATH_REC_FIELD(opa.l2_8B),
355 { OPA_PATH_REC_FIELD(opa.l2_10B),
359 { OPA_PATH_REC_FIELD(opa.l2_9B),
363 { OPA_PATH_REC_FIELD(opa.l2_16B),
371 { OPA_PATH_REC_FIELD(opa.qos_type),
375 { OPA_PATH_REC_FIELD(opa.qos_priority),
383 { OPA_PATH_REC_FIELD(sl),
391 { OPA_PATH_REC_FIELD(mtu_selector),
395 { OPA_PATH_REC_FIELD(mtu),
399 { OPA_PATH_REC_FIELD(rate_selector),
403 { OPA_PATH_REC_FIELD(rate),
407 { OPA_PATH_REC_FIELD(packet_life_time_selector),
411 { OPA_PATH_REC_FIELD(packet_life_time),
415 { OPA_PATH_REC_FIELD(preference),
421 #define MCMEMBER_REC_FIELD(field) \
422 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
423 .struct_size_bytes = sizeof_field(struct ib_sa_mcmember_rec, field), \
424 .field_name = "sa_mcmember_rec:" #field
426 static const struct ib_field mcmember_rec_table[] = {
427 { MCMEMBER_REC_FIELD(mgid),
431 { MCMEMBER_REC_FIELD(port_gid),
435 { MCMEMBER_REC_FIELD(qkey),
439 { MCMEMBER_REC_FIELD(mlid),
443 { MCMEMBER_REC_FIELD(mtu_selector),
447 { MCMEMBER_REC_FIELD(mtu),
451 { MCMEMBER_REC_FIELD(traffic_class),
455 { MCMEMBER_REC_FIELD(pkey),
459 { MCMEMBER_REC_FIELD(rate_selector),
463 { MCMEMBER_REC_FIELD(rate),
467 { MCMEMBER_REC_FIELD(packet_life_time_selector),
471 { MCMEMBER_REC_FIELD(packet_life_time),
475 { MCMEMBER_REC_FIELD(sl),
479 { MCMEMBER_REC_FIELD(flow_label),
483 { MCMEMBER_REC_FIELD(hop_limit),
487 { MCMEMBER_REC_FIELD(scope),
491 { MCMEMBER_REC_FIELD(join_state),
495 { MCMEMBER_REC_FIELD(proxy_join),
505 #define SERVICE_REC_FIELD(field) \
506 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
507 .struct_size_bytes = sizeof_field(struct ib_sa_service_rec, field), \
508 .field_name = "sa_service_rec:" #field
510 static const struct ib_field service_rec_table[] = {
511 { SERVICE_REC_FIELD(id),
515 { SERVICE_REC_FIELD(gid),
519 { SERVICE_REC_FIELD(pkey),
523 { SERVICE_REC_FIELD(lease),
527 { SERVICE_REC_FIELD(key),
531 { SERVICE_REC_FIELD(name),
535 { SERVICE_REC_FIELD(data8),
539 { SERVICE_REC_FIELD(data16),
543 { SERVICE_REC_FIELD(data32),
547 { SERVICE_REC_FIELD(data64),
553 #define CLASSPORTINFO_REC_FIELD(field) \
554 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
555 .struct_size_bytes = sizeof_field(struct ib_class_port_info, field), \
556 .field_name = "ib_class_port_info:" #field
558 static const struct ib_field ib_classport_info_rec_table[] = {
559 { CLASSPORTINFO_REC_FIELD(base_version),
563 { CLASSPORTINFO_REC_FIELD(class_version),
567 { CLASSPORTINFO_REC_FIELD(capability_mask),
571 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
575 { CLASSPORTINFO_REC_FIELD(redirect_gid),
579 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
583 { CLASSPORTINFO_REC_FIELD(redirect_lid),
587 { CLASSPORTINFO_REC_FIELD(redirect_pkey),
592 { CLASSPORTINFO_REC_FIELD(redirect_qp),
596 { CLASSPORTINFO_REC_FIELD(redirect_qkey),
601 { CLASSPORTINFO_REC_FIELD(trap_gid),
605 { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
610 { CLASSPORTINFO_REC_FIELD(trap_lid),
614 { CLASSPORTINFO_REC_FIELD(trap_pkey),
619 { CLASSPORTINFO_REC_FIELD(trap_hlqp),
623 { CLASSPORTINFO_REC_FIELD(trap_qkey),
629 #define OPA_CLASSPORTINFO_REC_FIELD(field) \
630 .struct_offset_bytes =\
631 offsetof(struct opa_class_port_info, field), \
632 .struct_size_bytes = \
633 sizeof_field(struct opa_class_port_info, field), \
634 .field_name = "opa_class_port_info:" #field
636 static const struct ib_field opa_classport_info_rec_table[] = {
637 { OPA_CLASSPORTINFO_REC_FIELD(base_version),
641 { OPA_CLASSPORTINFO_REC_FIELD(class_version),
645 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask),
649 { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
653 { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid),
657 { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl),
661 { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid),
665 { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp),
669 { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey),
673 { OPA_CLASSPORTINFO_REC_FIELD(trap_gid),
677 { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl),
681 { OPA_CLASSPORTINFO_REC_FIELD(trap_lid),
685 { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp),
689 { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey),
693 { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey),
697 { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey),
701 { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd),
711 #define GUIDINFO_REC_FIELD(field) \
712 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
713 .struct_size_bytes = sizeof_field(struct ib_sa_guidinfo_rec, field), \
714 .field_name = "sa_guidinfo_rec:" #field
716 static const struct ib_field guidinfo_rec_table[] = {
717 { GUIDINFO_REC_FIELD(lid),
721 { GUIDINFO_REC_FIELD(block_num),
725 { GUIDINFO_REC_FIELD(res1),
729 { GUIDINFO_REC_FIELD(res2),
733 { GUIDINFO_REC_FIELD(guid_info_list),
739 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
741 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
744 static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
746 return (query->flags & IB_SA_CANCEL);
749 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
750 struct ib_sa_query *query)
752 struct sa_path_rec *sa_rec = query->mad_buf->context[1];
753 struct ib_sa_mad *mad = query->mad_buf->mad;
754 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
757 struct rdma_ls_resolve_header *header;
759 query->mad_buf->context[1] = NULL;
761 /* Construct the family header first */
762 header = skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
763 memcpy(header->device_name, dev_name(&query->port->agent->device->dev),
765 header->port_num = query->port->port_num;
767 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
768 sa_rec->reversible != 0)
769 query->path_use = LS_RESOLVE_PATH_USE_GMP;
771 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
772 header->path_use = query->path_use;
774 /* Now build the attributes */
775 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
776 val64 = be64_to_cpu(sa_rec->service_id);
777 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
778 sizeof(val64), &val64);
780 if (comp_mask & IB_SA_PATH_REC_DGID)
781 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
782 sizeof(sa_rec->dgid), &sa_rec->dgid);
783 if (comp_mask & IB_SA_PATH_REC_SGID)
784 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
785 sizeof(sa_rec->sgid), &sa_rec->sgid);
786 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
787 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
788 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
790 if (comp_mask & IB_SA_PATH_REC_PKEY) {
791 val16 = be16_to_cpu(sa_rec->pkey);
792 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
793 sizeof(val16), &val16);
795 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
796 val16 = be16_to_cpu(sa_rec->qos_class);
797 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
798 sizeof(val16), &val16);
802 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
806 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
807 len += nla_total_size(sizeof(u64));
808 if (comp_mask & IB_SA_PATH_REC_DGID)
809 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
810 if (comp_mask & IB_SA_PATH_REC_SGID)
811 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
812 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
813 len += nla_total_size(sizeof(u8));
814 if (comp_mask & IB_SA_PATH_REC_PKEY)
815 len += nla_total_size(sizeof(u16));
816 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
817 len += nla_total_size(sizeof(u16));
820 * Make sure that at least some of the required comp_mask bits are
823 if (WARN_ON(len == 0))
826 /* Add the family header */
827 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
832 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
834 struct sk_buff *skb = NULL;
835 struct nlmsghdr *nlh;
837 struct ib_sa_mad *mad;
844 INIT_LIST_HEAD(&query->list);
845 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
847 mad = query->mad_buf->mad;
848 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
852 skb = nlmsg_new(len, gfp_mask);
856 /* Put nlmsg header only for now */
857 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
858 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
865 ib_nl_set_path_rec_attrs(skb, query);
867 /* Repair the nlmsg header length */
870 gfp_flag = ((gfp_mask & GFP_ATOMIC) == GFP_ATOMIC) ? GFP_ATOMIC :
873 spin_lock_irqsave(&ib_nl_request_lock, flags);
874 ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, gfp_flag);
879 /* Put the request on the list.*/
880 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
881 query->timeout = delay + jiffies;
882 list_add_tail(&query->list, &ib_nl_request_list);
883 /* Start the timeout if this is the only request */
884 if (ib_nl_request_list.next == &query->list)
885 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
888 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
893 static int ib_nl_cancel_request(struct ib_sa_query *query)
896 struct ib_sa_query *wait_query;
899 spin_lock_irqsave(&ib_nl_request_lock, flags);
900 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
901 /* Let the timeout to take care of the callback */
902 if (query == wait_query) {
903 query->flags |= IB_SA_CANCEL;
904 query->timeout = jiffies;
905 list_move(&query->list, &ib_nl_request_list);
907 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
911 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
916 static void send_handler(struct ib_mad_agent *agent,
917 struct ib_mad_send_wc *mad_send_wc);
919 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
920 const struct nlmsghdr *nlh)
922 struct ib_mad_send_wc mad_send_wc;
923 struct ib_sa_mad *mad = NULL;
924 const struct nlattr *head, *curr;
925 struct ib_path_rec_data *rec;
930 if (query->callback) {
931 head = (const struct nlattr *) nlmsg_data(nlh);
932 len = nlmsg_len(nlh);
933 switch (query->path_use) {
934 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
935 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
938 case LS_RESOLVE_PATH_USE_ALL:
939 case LS_RESOLVE_PATH_USE_GMP:
941 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
942 IB_PATH_BIDIRECTIONAL;
945 nla_for_each_attr(curr, head, len, rem) {
946 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
947 rec = nla_data(curr);
949 * Get the first one. In the future, we may
950 * need to get up to 6 pathrecords.
952 if ((rec->flags & mask) == mask) {
953 mad = query->mad_buf->mad;
954 mad->mad_hdr.method |=
956 memcpy(mad->data, rec->path_rec,
957 sizeof(rec->path_rec));
963 query->callback(query, status, mad);
966 mad_send_wc.send_buf = query->mad_buf;
967 mad_send_wc.status = IB_WC_SUCCESS;
968 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
971 static void ib_nl_request_timeout(struct work_struct *work)
974 struct ib_sa_query *query;
976 struct ib_mad_send_wc mad_send_wc;
979 spin_lock_irqsave(&ib_nl_request_lock, flags);
980 while (!list_empty(&ib_nl_request_list)) {
981 query = list_entry(ib_nl_request_list.next,
982 struct ib_sa_query, list);
984 if (time_after(query->timeout, jiffies)) {
985 delay = query->timeout - jiffies;
986 if ((long)delay <= 0)
988 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
992 list_del(&query->list);
993 ib_sa_disable_local_svc(query);
994 /* Hold the lock to protect against query cancellation */
995 if (ib_sa_query_cancelled(query))
998 ret = ib_post_send_mad(query->mad_buf, NULL);
1000 mad_send_wc.send_buf = query->mad_buf;
1001 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
1002 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1003 send_handler(query->port->agent, &mad_send_wc);
1004 spin_lock_irqsave(&ib_nl_request_lock, flags);
1007 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1010 int ib_nl_handle_set_timeout(struct sk_buff *skb,
1011 struct nlmsghdr *nlh,
1012 struct netlink_ext_ack *extack)
1014 int timeout, delta, abs_delta;
1015 const struct nlattr *attr;
1016 unsigned long flags;
1017 struct ib_sa_query *query;
1019 struct nlattr *tb[LS_NLA_TYPE_MAX];
1022 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
1023 !(NETLINK_CB(skb).sk))
1026 ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1027 nlmsg_len(nlh), ib_nl_policy, NULL);
1028 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
1030 goto settimeout_out;
1032 timeout = *(int *) nla_data(attr);
1033 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
1034 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
1035 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
1036 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
1038 delta = timeout - sa_local_svc_timeout_ms;
1045 spin_lock_irqsave(&ib_nl_request_lock, flags);
1046 sa_local_svc_timeout_ms = timeout;
1047 list_for_each_entry(query, &ib_nl_request_list, list) {
1048 if (delta < 0 && abs_delta > query->timeout)
1051 query->timeout += delta;
1053 /* Get the new delay from the first entry */
1055 delay = query->timeout - jiffies;
1061 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1062 (unsigned long)delay);
1063 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1070 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1072 struct nlattr *tb[LS_NLA_TYPE_MAX];
1075 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1078 ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1079 nlmsg_len(nlh), ib_nl_policy, NULL);
1086 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1087 struct nlmsghdr *nlh,
1088 struct netlink_ext_ack *extack)
1090 unsigned long flags;
1091 struct ib_sa_query *query;
1092 struct ib_mad_send_buf *send_buf;
1093 struct ib_mad_send_wc mad_send_wc;
1097 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1098 !(NETLINK_CB(skb).sk))
1101 spin_lock_irqsave(&ib_nl_request_lock, flags);
1102 list_for_each_entry(query, &ib_nl_request_list, list) {
1104 * If the query is cancelled, let the timeout routine
1107 if (nlh->nlmsg_seq == query->seq) {
1108 found = !ib_sa_query_cancelled(query);
1110 list_del(&query->list);
1116 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1120 send_buf = query->mad_buf;
1122 if (!ib_nl_is_good_resolve_resp(nlh)) {
1123 /* if the result is a failure, send out the packet via IB */
1124 ib_sa_disable_local_svc(query);
1125 ret = ib_post_send_mad(query->mad_buf, NULL);
1126 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1128 mad_send_wc.send_buf = send_buf;
1129 mad_send_wc.status = IB_WC_GENERAL_ERR;
1130 send_handler(query->port->agent, &mad_send_wc);
1133 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1134 ib_nl_process_good_resolve_rsp(query, nlh);
1141 static void free_sm_ah(struct kref *kref)
1143 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1145 rdma_destroy_ah(sm_ah->ah, 0);
1149 void ib_sa_register_client(struct ib_sa_client *client)
1151 atomic_set(&client->users, 1);
1152 init_completion(&client->comp);
1154 EXPORT_SYMBOL(ib_sa_register_client);
1156 void ib_sa_unregister_client(struct ib_sa_client *client)
1158 ib_sa_client_put(client);
1159 wait_for_completion(&client->comp);
1161 EXPORT_SYMBOL(ib_sa_unregister_client);
1164 * ib_sa_cancel_query - try to cancel an SA query
1165 * @id:ID of query to cancel
1166 * @query:query pointer to cancel
1168 * Try to cancel an SA query. If the id and query don't match up or
1169 * the query has already completed, nothing is done. Otherwise the
1170 * query is canceled and will complete with a status of -EINTR.
1172 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1174 unsigned long flags;
1175 struct ib_mad_agent *agent;
1176 struct ib_mad_send_buf *mad_buf;
1178 xa_lock_irqsave(&queries, flags);
1179 if (xa_load(&queries, id) != query) {
1180 xa_unlock_irqrestore(&queries, flags);
1183 agent = query->port->agent;
1184 mad_buf = query->mad_buf;
1185 xa_unlock_irqrestore(&queries, flags);
1188 * If the query is still on the netlink request list, schedule
1189 * it to be cancelled by the timeout routine. Otherwise, it has been
1190 * sent to the MAD layer and has to be cancelled from there.
1192 if (!ib_nl_cancel_request(query))
1193 ib_cancel_mad(agent, mad_buf);
1195 EXPORT_SYMBOL(ib_sa_cancel_query);
1197 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1199 struct ib_sa_device *sa_dev;
1200 struct ib_sa_port *port;
1201 unsigned long flags;
1204 sa_dev = ib_get_client_data(device, &sa_client);
1208 port = &sa_dev->port[port_num - sa_dev->start_port];
1209 spin_lock_irqsave(&port->ah_lock, flags);
1210 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1211 spin_unlock_irqrestore(&port->ah_lock, flags);
1213 return src_path_mask;
1216 static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num,
1217 struct sa_path_rec *rec,
1218 struct rdma_ah_attr *ah_attr,
1219 const struct ib_gid_attr *gid_attr)
1221 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1224 gid_attr = rdma_find_gid_by_port(device, &rec->sgid, type,
1226 if (IS_ERR(gid_attr))
1227 return PTR_ERR(gid_attr);
1229 rdma_hold_gid_attr(gid_attr);
1231 rdma_move_grh_sgid_attr(ah_attr, &rec->dgid,
1232 be32_to_cpu(rec->flow_label),
1233 rec->hop_limit, rec->traffic_class,
1239 * ib_init_ah_attr_from_path - Initialize address handle attributes based on
1240 * an SA path record.
1241 * @device: Device associated ah attributes initialization.
1242 * @port_num: Port on the specified device.
1243 * @rec: path record entry to use for ah attributes initialization.
1244 * @ah_attr: address handle attributes to initialization from path record.
1245 * @gid_attr: SGID attribute to consider during initialization.
1247 * When ib_init_ah_attr_from_path() returns success,
1248 * (a) for IB link layer it optionally contains a reference to SGID attribute
1249 * when GRH is present for IB link layer.
1250 * (b) for RoCE link layer it contains a reference to SGID attribute.
1251 * User must invoke rdma_destroy_ah_attr() to release reference to SGID
1252 * attributes which are initialized using ib_init_ah_attr_from_path().
1254 int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num,
1255 struct sa_path_rec *rec,
1256 struct rdma_ah_attr *ah_attr,
1257 const struct ib_gid_attr *gid_attr)
1261 memset(ah_attr, 0, sizeof(*ah_attr));
1262 ah_attr->type = rdma_ah_find_type(device, port_num);
1263 rdma_ah_set_sl(ah_attr, rec->sl);
1264 rdma_ah_set_port_num(ah_attr, port_num);
1265 rdma_ah_set_static_rate(ah_attr, rec->rate);
1267 if (sa_path_is_roce(rec)) {
1268 ret = roce_resolve_route_from_path(rec, gid_attr);
1272 memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
1274 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1275 if (sa_path_is_opa(rec) &&
1276 rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
1277 rdma_ah_set_make_grd(ah_attr, true);
1279 rdma_ah_set_path_bits(ah_attr,
1280 be32_to_cpu(sa_path_get_slid(rec)) &
1281 get_src_path_mask(device, port_num));
1284 if (rec->hop_limit > 0 || sa_path_is_roce(rec))
1285 ret = init_ah_attr_grh_fields(device, port_num,
1286 rec, ah_attr, gid_attr);
1289 EXPORT_SYMBOL(ib_init_ah_attr_from_path);
1291 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1293 struct rdma_ah_attr ah_attr;
1294 unsigned long flags;
1296 spin_lock_irqsave(&query->port->ah_lock, flags);
1297 if (!query->port->sm_ah) {
1298 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1301 kref_get(&query->port->sm_ah->ref);
1302 query->sm_ah = query->port->sm_ah;
1303 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1306 * Always check if sm_ah has valid dlid assigned,
1307 * before querying for class port info
1309 if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) ||
1310 !rdma_is_valid_unicast_lid(&ah_attr)) {
1311 kref_put(&query->sm_ah->ref, free_sm_ah);
1314 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1315 query->sm_ah->pkey_index,
1316 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1318 ((query->flags & IB_SA_QUERY_OPA) ?
1319 OPA_MGMT_BASE_VERSION :
1320 IB_MGMT_BASE_VERSION));
1321 if (IS_ERR(query->mad_buf)) {
1322 kref_put(&query->sm_ah->ref, free_sm_ah);
1326 query->mad_buf->ah = query->sm_ah->ah;
1331 static void free_mad(struct ib_sa_query *query)
1333 ib_free_send_mad(query->mad_buf);
1334 kref_put(&query->sm_ah->ref, free_sm_ah);
1337 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1339 struct ib_sa_mad *mad = query->mad_buf->mad;
1340 unsigned long flags;
1342 memset(mad, 0, sizeof *mad);
1344 if (query->flags & IB_SA_QUERY_OPA) {
1345 mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
1346 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1348 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1349 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1351 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1352 spin_lock_irqsave(&tid_lock, flags);
1354 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1355 spin_unlock_irqrestore(&tid_lock, flags);
1358 static int send_mad(struct ib_sa_query *query, unsigned long timeout_ms,
1361 unsigned long flags;
1364 xa_lock_irqsave(&queries, flags);
1365 ret = __xa_alloc(&queries, &id, query, xa_limit_32b, gfp_mask);
1366 xa_unlock_irqrestore(&queries, flags);
1370 query->mad_buf->timeout_ms = timeout_ms;
1371 query->mad_buf->context[0] = query;
1374 if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1375 (!(query->flags & IB_SA_QUERY_OPA))) {
1376 if (rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
1377 if (!ib_nl_make_request(query, gfp_mask))
1380 ib_sa_disable_local_svc(query);
1383 ret = ib_post_send_mad(query->mad_buf, NULL);
1385 xa_lock_irqsave(&queries, flags);
1386 __xa_erase(&queries, id);
1387 xa_unlock_irqrestore(&queries, flags);
1391 * It's not safe to dereference query any more, because the
1392 * send may already have completed and freed the query in
1395 return ret ? ret : id;
1398 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1400 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1402 EXPORT_SYMBOL(ib_sa_unpack_path);
1404 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1406 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1408 EXPORT_SYMBOL(ib_sa_pack_path);
1410 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1411 struct ib_sa_device *sa_dev,
1414 struct ib_sa_port *port;
1415 unsigned long flags;
1418 port = &sa_dev->port[port_num - sa_dev->start_port];
1419 spin_lock_irqsave(&port->classport_lock, flags);
1420 if (!port->classport_info.valid)
1423 if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1424 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1425 OPA_CLASS_PORT_INFO_PR_SUPPORT;
1427 spin_unlock_irqrestore(&port->classport_lock, flags);
1431 enum opa_pr_supported {
1438 * Check if current PR query can be an OPA query.
1439 * Retuns PR_NOT_SUPPORTED if a path record query is not
1440 * possible, PR_OPA_SUPPORTED if an OPA path record query
1441 * is possible and PR_IB_SUPPORTED if an IB path record
1442 * query is possible.
1444 static int opa_pr_query_possible(struct ib_sa_client *client,
1445 struct ib_sa_device *sa_dev,
1446 struct ib_device *device, u8 port_num,
1447 struct sa_path_rec *rec)
1449 struct ib_port_attr port_attr;
1451 if (ib_query_port(device, port_num, &port_attr))
1452 return PR_NOT_SUPPORTED;
1454 if (ib_sa_opa_pathrecord_support(client, sa_dev, port_num))
1455 return PR_OPA_SUPPORTED;
1457 if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1458 return PR_NOT_SUPPORTED;
1460 return PR_IB_SUPPORTED;
1463 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1465 struct ib_sa_mad *mad)
1467 struct ib_sa_path_query *query =
1468 container_of(sa_query, struct ib_sa_path_query, sa_query);
1471 struct sa_path_rec rec;
1473 if (sa_query->flags & IB_SA_QUERY_OPA) {
1474 ib_unpack(opa_path_rec_table,
1475 ARRAY_SIZE(opa_path_rec_table),
1477 rec.rec_type = SA_PATH_REC_TYPE_OPA;
1478 query->callback(status, &rec, query->context);
1480 ib_unpack(path_rec_table,
1481 ARRAY_SIZE(path_rec_table),
1483 rec.rec_type = SA_PATH_REC_TYPE_IB;
1484 sa_path_set_dmac_zero(&rec);
1486 if (query->conv_pr) {
1487 struct sa_path_rec opa;
1489 memset(&opa, 0, sizeof(struct sa_path_rec));
1490 sa_convert_path_ib_to_opa(&opa, &rec);
1491 query->callback(status, &opa, query->context);
1493 query->callback(status, &rec, query->context);
1497 query->callback(status, NULL, query->context);
1500 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1502 struct ib_sa_path_query *query =
1503 container_of(sa_query, struct ib_sa_path_query, sa_query);
1505 kfree(query->conv_pr);
1510 * ib_sa_path_rec_get - Start a Path get query
1512 * @device:device to send query on
1513 * @port_num: port number to send query on
1514 * @rec:Path Record to send in query
1515 * @comp_mask:component mask to send in query
1516 * @timeout_ms:time to wait for response
1517 * @gfp_mask:GFP mask to use for internal allocations
1518 * @callback:function called when query completes, times out or is
1520 * @context:opaque user context passed to callback
1521 * @sa_query:query context, used to cancel query
1523 * Send a Path Record Get query to the SA to look up a path. The
1524 * callback function will be called when the query completes (or
1525 * fails); status is 0 for a successful response, -EINTR if the query
1526 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1527 * occurred sending the query. The resp parameter of the callback is
1528 * only valid if status is 0.
1530 * If the return value of ib_sa_path_rec_get() is negative, it is an
1531 * error code. Otherwise it is a query ID that can be used to cancel
1534 int ib_sa_path_rec_get(struct ib_sa_client *client,
1535 struct ib_device *device, u8 port_num,
1536 struct sa_path_rec *rec,
1537 ib_sa_comp_mask comp_mask,
1538 unsigned long timeout_ms, gfp_t gfp_mask,
1539 void (*callback)(int status,
1540 struct sa_path_rec *resp,
1543 struct ib_sa_query **sa_query)
1545 struct ib_sa_path_query *query;
1546 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1547 struct ib_sa_port *port;
1548 struct ib_mad_agent *agent;
1549 struct ib_sa_mad *mad;
1550 enum opa_pr_supported status;
1556 if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1557 (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1560 port = &sa_dev->port[port_num - sa_dev->start_port];
1561 agent = port->agent;
1563 query = kzalloc(sizeof(*query), gfp_mask);
1567 query->sa_query.port = port;
1568 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1569 status = opa_pr_query_possible(client, sa_dev, device, port_num,
1571 if (status == PR_NOT_SUPPORTED) {
1574 } else if (status == PR_OPA_SUPPORTED) {
1575 query->sa_query.flags |= IB_SA_QUERY_OPA;
1578 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1579 if (!query->conv_pr) {
1586 ret = alloc_mad(&query->sa_query, gfp_mask);
1590 ib_sa_client_get(client);
1591 query->sa_query.client = client;
1592 query->callback = callback;
1593 query->context = context;
1595 mad = query->sa_query.mad_buf->mad;
1596 init_mad(&query->sa_query, agent);
1598 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1599 query->sa_query.release = ib_sa_path_rec_release;
1600 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1601 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1602 mad->sa_hdr.comp_mask = comp_mask;
1604 if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1605 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1607 } else if (query->conv_pr) {
1608 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1609 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1610 query->conv_pr, mad->data);
1612 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1616 *sa_query = &query->sa_query;
1618 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1619 query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1620 query->conv_pr : rec;
1622 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1630 ib_sa_client_put(query->sa_query.client);
1631 free_mad(&query->sa_query);
1633 kfree(query->conv_pr);
1638 EXPORT_SYMBOL(ib_sa_path_rec_get);
1640 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1642 struct ib_sa_mad *mad)
1644 struct ib_sa_service_query *query =
1645 container_of(sa_query, struct ib_sa_service_query, sa_query);
1648 struct ib_sa_service_rec rec;
1650 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1652 query->callback(status, &rec, query->context);
1654 query->callback(status, NULL, query->context);
1657 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1659 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1663 * ib_sa_service_rec_query - Start Service Record operation
1665 * @device:device to send request on
1666 * @port_num: port number to send request on
1667 * @method:SA method - should be get, set, or delete
1668 * @rec:Service Record to send in request
1669 * @comp_mask:component mask to send in request
1670 * @timeout_ms:time to wait for response
1671 * @gfp_mask:GFP mask to use for internal allocations
1672 * @callback:function called when request completes, times out or is
1674 * @context:opaque user context passed to callback
1675 * @sa_query:request context, used to cancel request
1677 * Send a Service Record set/get/delete to the SA to register,
1678 * unregister or query a service record.
1679 * The callback function will be called when the request completes (or
1680 * fails); status is 0 for a successful response, -EINTR if the query
1681 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1682 * occurred sending the query. The resp parameter of the callback is
1683 * only valid if status is 0.
1685 * If the return value of ib_sa_service_rec_query() is negative, it is an
1686 * error code. Otherwise it is a request ID that can be used to cancel
1689 int ib_sa_service_rec_query(struct ib_sa_client *client,
1690 struct ib_device *device, u8 port_num, u8 method,
1691 struct ib_sa_service_rec *rec,
1692 ib_sa_comp_mask comp_mask,
1693 unsigned long timeout_ms, gfp_t gfp_mask,
1694 void (*callback)(int status,
1695 struct ib_sa_service_rec *resp,
1698 struct ib_sa_query **sa_query)
1700 struct ib_sa_service_query *query;
1701 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1702 struct ib_sa_port *port;
1703 struct ib_mad_agent *agent;
1704 struct ib_sa_mad *mad;
1710 port = &sa_dev->port[port_num - sa_dev->start_port];
1711 agent = port->agent;
1713 if (method != IB_MGMT_METHOD_GET &&
1714 method != IB_MGMT_METHOD_SET &&
1715 method != IB_SA_METHOD_DELETE)
1718 query = kzalloc(sizeof(*query), gfp_mask);
1722 query->sa_query.port = port;
1723 ret = alloc_mad(&query->sa_query, gfp_mask);
1727 ib_sa_client_get(client);
1728 query->sa_query.client = client;
1729 query->callback = callback;
1730 query->context = context;
1732 mad = query->sa_query.mad_buf->mad;
1733 init_mad(&query->sa_query, agent);
1735 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1736 query->sa_query.release = ib_sa_service_rec_release;
1737 mad->mad_hdr.method = method;
1738 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1739 mad->sa_hdr.comp_mask = comp_mask;
1741 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1744 *sa_query = &query->sa_query;
1746 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1754 ib_sa_client_put(query->sa_query.client);
1755 free_mad(&query->sa_query);
1761 EXPORT_SYMBOL(ib_sa_service_rec_query);
1763 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1765 struct ib_sa_mad *mad)
1767 struct ib_sa_mcmember_query *query =
1768 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1771 struct ib_sa_mcmember_rec rec;
1773 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1775 query->callback(status, &rec, query->context);
1777 query->callback(status, NULL, query->context);
1780 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1782 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1785 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1786 struct ib_device *device, u8 port_num,
1788 struct ib_sa_mcmember_rec *rec,
1789 ib_sa_comp_mask comp_mask,
1790 unsigned long timeout_ms, gfp_t gfp_mask,
1791 void (*callback)(int status,
1792 struct ib_sa_mcmember_rec *resp,
1795 struct ib_sa_query **sa_query)
1797 struct ib_sa_mcmember_query *query;
1798 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1799 struct ib_sa_port *port;
1800 struct ib_mad_agent *agent;
1801 struct ib_sa_mad *mad;
1807 port = &sa_dev->port[port_num - sa_dev->start_port];
1808 agent = port->agent;
1810 query = kzalloc(sizeof(*query), gfp_mask);
1814 query->sa_query.port = port;
1815 ret = alloc_mad(&query->sa_query, gfp_mask);
1819 ib_sa_client_get(client);
1820 query->sa_query.client = client;
1821 query->callback = callback;
1822 query->context = context;
1824 mad = query->sa_query.mad_buf->mad;
1825 init_mad(&query->sa_query, agent);
1827 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1828 query->sa_query.release = ib_sa_mcmember_rec_release;
1829 mad->mad_hdr.method = method;
1830 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1831 mad->sa_hdr.comp_mask = comp_mask;
1833 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1836 *sa_query = &query->sa_query;
1838 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1846 ib_sa_client_put(query->sa_query.client);
1847 free_mad(&query->sa_query);
1854 /* Support GuidInfoRecord */
1855 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1857 struct ib_sa_mad *mad)
1859 struct ib_sa_guidinfo_query *query =
1860 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1863 struct ib_sa_guidinfo_rec rec;
1865 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1867 query->callback(status, &rec, query->context);
1869 query->callback(status, NULL, query->context);
1872 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1874 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1877 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1878 struct ib_device *device, u8 port_num,
1879 struct ib_sa_guidinfo_rec *rec,
1880 ib_sa_comp_mask comp_mask, u8 method,
1881 unsigned long timeout_ms, gfp_t gfp_mask,
1882 void (*callback)(int status,
1883 struct ib_sa_guidinfo_rec *resp,
1886 struct ib_sa_query **sa_query)
1888 struct ib_sa_guidinfo_query *query;
1889 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1890 struct ib_sa_port *port;
1891 struct ib_mad_agent *agent;
1892 struct ib_sa_mad *mad;
1898 if (method != IB_MGMT_METHOD_GET &&
1899 method != IB_MGMT_METHOD_SET &&
1900 method != IB_SA_METHOD_DELETE) {
1904 port = &sa_dev->port[port_num - sa_dev->start_port];
1905 agent = port->agent;
1907 query = kzalloc(sizeof(*query), gfp_mask);
1911 query->sa_query.port = port;
1912 ret = alloc_mad(&query->sa_query, gfp_mask);
1916 ib_sa_client_get(client);
1917 query->sa_query.client = client;
1918 query->callback = callback;
1919 query->context = context;
1921 mad = query->sa_query.mad_buf->mad;
1922 init_mad(&query->sa_query, agent);
1924 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1925 query->sa_query.release = ib_sa_guidinfo_rec_release;
1927 mad->mad_hdr.method = method;
1928 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1929 mad->sa_hdr.comp_mask = comp_mask;
1931 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1934 *sa_query = &query->sa_query;
1936 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1944 ib_sa_client_put(query->sa_query.client);
1945 free_mad(&query->sa_query);
1951 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1953 bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
1954 struct ib_device *device,
1957 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1958 struct ib_sa_port *port;
1960 unsigned long flags;
1965 port = &sa_dev->port[port_num - sa_dev->start_port];
1967 spin_lock_irqsave(&port->classport_lock, flags);
1968 if ((port->classport_info.valid) &&
1969 (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
1970 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
1971 & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
1972 spin_unlock_irqrestore(&port->classport_lock, flags);
1975 EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
1977 struct ib_classport_info_context {
1978 struct completion done;
1979 struct ib_sa_query *sa_query;
1982 static void ib_classportinfo_cb(void *context)
1984 struct ib_classport_info_context *cb_ctx = context;
1986 complete(&cb_ctx->done);
1989 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
1991 struct ib_sa_mad *mad)
1993 unsigned long flags;
1994 struct ib_sa_classport_info_query *query =
1995 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
1996 struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
1999 if (sa_query->flags & IB_SA_QUERY_OPA) {
2000 struct opa_class_port_info rec;
2002 ib_unpack(opa_classport_info_rec_table,
2003 ARRAY_SIZE(opa_classport_info_rec_table),
2006 spin_lock_irqsave(&sa_query->port->classport_lock,
2008 if (!status && !info->valid) {
2009 memcpy(&info->data.opa, &rec,
2010 sizeof(info->data.opa));
2013 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2015 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2019 struct ib_class_port_info rec;
2021 ib_unpack(ib_classport_info_rec_table,
2022 ARRAY_SIZE(ib_classport_info_rec_table),
2025 spin_lock_irqsave(&sa_query->port->classport_lock,
2027 if (!status && !info->valid) {
2028 memcpy(&info->data.ib, &rec,
2029 sizeof(info->data.ib));
2032 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2034 spin_unlock_irqrestore(&sa_query->port->classport_lock,
2038 query->callback(query->context);
2041 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2043 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2047 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2048 unsigned long timeout_ms,
2049 void (*callback)(void *context),
2051 struct ib_sa_query **sa_query)
2053 struct ib_mad_agent *agent;
2054 struct ib_sa_classport_info_query *query;
2055 struct ib_sa_mad *mad;
2056 gfp_t gfp_mask = GFP_KERNEL;
2059 agent = port->agent;
2061 query = kzalloc(sizeof(*query), gfp_mask);
2065 query->sa_query.port = port;
2066 query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2068 IB_SA_QUERY_OPA : 0;
2069 ret = alloc_mad(&query->sa_query, gfp_mask);
2073 query->callback = callback;
2074 query->context = context;
2076 mad = query->sa_query.mad_buf->mad;
2077 init_mad(&query->sa_query, agent);
2079 query->sa_query.callback = ib_sa_classport_info_rec_callback;
2080 query->sa_query.release = ib_sa_classport_info_rec_release;
2081 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
2082 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2083 mad->sa_hdr.comp_mask = 0;
2084 *sa_query = &query->sa_query;
2086 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2094 free_mad(&query->sa_query);
2101 static void update_ib_cpi(struct work_struct *work)
2103 struct ib_sa_port *port =
2104 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2105 struct ib_classport_info_context *cb_context;
2106 unsigned long flags;
2109 /* If the classport info is valid, nothing
2112 spin_lock_irqsave(&port->classport_lock, flags);
2113 if (port->classport_info.valid) {
2114 spin_unlock_irqrestore(&port->classport_lock, flags);
2117 spin_unlock_irqrestore(&port->classport_lock, flags);
2119 cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2123 init_completion(&cb_context->done);
2125 ret = ib_sa_classport_info_rec_query(port, 3000,
2126 ib_classportinfo_cb, cb_context,
2127 &cb_context->sa_query);
2130 wait_for_completion(&cb_context->done);
2133 spin_lock_irqsave(&port->classport_lock, flags);
2135 /* If the classport info is still not valid, the query should have
2136 * failed for some reason. Retry issuing the query
2138 if (!port->classport_info.valid) {
2139 port->classport_info.retry_cnt++;
2140 if (port->classport_info.retry_cnt <=
2141 IB_SA_CPI_MAX_RETRY_CNT) {
2142 unsigned long delay =
2143 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2145 queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2148 spin_unlock_irqrestore(&port->classport_lock, flags);
2154 static void send_handler(struct ib_mad_agent *agent,
2155 struct ib_mad_send_wc *mad_send_wc)
2157 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2158 unsigned long flags;
2160 if (query->callback)
2161 switch (mad_send_wc->status) {
2163 /* No callback -- already got recv */
2165 case IB_WC_RESP_TIMEOUT_ERR:
2166 query->callback(query, -ETIMEDOUT, NULL);
2168 case IB_WC_WR_FLUSH_ERR:
2169 query->callback(query, -EINTR, NULL);
2172 query->callback(query, -EIO, NULL);
2176 xa_lock_irqsave(&queries, flags);
2177 __xa_erase(&queries, query->id);
2178 xa_unlock_irqrestore(&queries, flags);
2182 ib_sa_client_put(query->client);
2183 query->release(query);
2186 static void recv_handler(struct ib_mad_agent *mad_agent,
2187 struct ib_mad_send_buf *send_buf,
2188 struct ib_mad_recv_wc *mad_recv_wc)
2190 struct ib_sa_query *query;
2195 query = send_buf->context[0];
2196 if (query->callback) {
2197 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2198 query->callback(query,
2199 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2201 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2203 query->callback(query, -EIO, NULL);
2206 ib_free_recv_mad(mad_recv_wc);
2209 static void update_sm_ah(struct work_struct *work)
2211 struct ib_sa_port *port =
2212 container_of(work, struct ib_sa_port, update_task);
2213 struct ib_sa_sm_ah *new_ah;
2214 struct ib_port_attr port_attr;
2215 struct rdma_ah_attr ah_attr;
2218 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2219 pr_warn("Couldn't query port\n");
2223 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2227 kref_init(&new_ah->ref);
2228 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2230 new_ah->pkey_index = 0;
2231 if (ib_find_pkey(port->agent->device, port->port_num,
2232 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2233 pr_err("Couldn't find index for default PKey\n");
2235 memset(&ah_attr, 0, sizeof(ah_attr));
2236 ah_attr.type = rdma_ah_find_type(port->agent->device,
2238 rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2239 rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2240 rdma_ah_set_port_num(&ah_attr, port->port_num);
2242 grh_required = rdma_is_grh_required(port->agent->device,
2246 * The OPA sm_lid of 0xFFFF needs special handling so that it can be
2247 * differentiated from a permissive LID of 0xFFFF. We set the
2248 * grh_required flag here so the SA can program the DGID in the
2249 * address handle appropriately
2251 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA &&
2253 port_attr.sm_lid == be16_to_cpu(IB_LID_PERMISSIVE)))
2254 rdma_ah_set_make_grd(&ah_attr, true);
2256 if (ah_attr.type == RDMA_AH_ATTR_TYPE_IB && grh_required) {
2257 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2258 rdma_ah_set_subnet_prefix(&ah_attr,
2259 cpu_to_be64(port_attr.subnet_prefix));
2260 rdma_ah_set_interface_id(&ah_attr,
2261 cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2264 new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr,
2265 RDMA_CREATE_AH_SLEEPABLE);
2266 if (IS_ERR(new_ah->ah)) {
2267 pr_warn("Couldn't create new SM AH\n");
2272 spin_lock_irq(&port->ah_lock);
2274 kref_put(&port->sm_ah->ref, free_sm_ah);
2275 port->sm_ah = new_ah;
2276 spin_unlock_irq(&port->ah_lock);
2279 static void ib_sa_event(struct ib_event_handler *handler,
2280 struct ib_event *event)
2282 if (event->event == IB_EVENT_PORT_ERR ||
2283 event->event == IB_EVENT_PORT_ACTIVE ||
2284 event->event == IB_EVENT_LID_CHANGE ||
2285 event->event == IB_EVENT_PKEY_CHANGE ||
2286 event->event == IB_EVENT_SM_CHANGE ||
2287 event->event == IB_EVENT_CLIENT_REREGISTER) {
2288 unsigned long flags;
2289 struct ib_sa_device *sa_dev =
2290 container_of(handler, typeof(*sa_dev), event_handler);
2291 u8 port_num = event->element.port_num - sa_dev->start_port;
2292 struct ib_sa_port *port = &sa_dev->port[port_num];
2294 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2297 spin_lock_irqsave(&port->ah_lock, flags);
2299 kref_put(&port->sm_ah->ref, free_sm_ah);
2301 spin_unlock_irqrestore(&port->ah_lock, flags);
2303 if (event->event == IB_EVENT_SM_CHANGE ||
2304 event->event == IB_EVENT_CLIENT_REREGISTER ||
2305 event->event == IB_EVENT_LID_CHANGE ||
2306 event->event == IB_EVENT_PORT_ACTIVE) {
2307 unsigned long delay =
2308 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2310 spin_lock_irqsave(&port->classport_lock, flags);
2311 port->classport_info.valid = false;
2312 port->classport_info.retry_cnt = 0;
2313 spin_unlock_irqrestore(&port->classport_lock, flags);
2314 queue_delayed_work(ib_wq,
2315 &port->ib_cpi_work, delay);
2317 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2321 static int ib_sa_add_one(struct ib_device *device)
2323 struct ib_sa_device *sa_dev;
2328 s = rdma_start_port(device);
2329 e = rdma_end_port(device);
2331 sa_dev = kzalloc(struct_size(sa_dev, port, e - s + 1), GFP_KERNEL);
2335 sa_dev->start_port = s;
2336 sa_dev->end_port = e;
2338 for (i = 0; i <= e - s; ++i) {
2339 spin_lock_init(&sa_dev->port[i].ah_lock);
2340 if (!rdma_cap_ib_sa(device, i + 1))
2343 sa_dev->port[i].sm_ah = NULL;
2344 sa_dev->port[i].port_num = i + s;
2346 spin_lock_init(&sa_dev->port[i].classport_lock);
2347 sa_dev->port[i].classport_info.valid = false;
2349 sa_dev->port[i].agent =
2350 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2351 NULL, 0, send_handler,
2352 recv_handler, sa_dev, 0);
2353 if (IS_ERR(sa_dev->port[i].agent)) {
2354 ret = PTR_ERR(sa_dev->port[i].agent);
2358 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2359 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2370 ib_set_client_data(device, &sa_client, sa_dev);
2373 * We register our event handler after everything is set up,
2374 * and then update our cached info after the event handler is
2375 * registered to avoid any problems if a port changes state
2376 * during our initialization.
2379 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2380 ib_register_event_handler(&sa_dev->event_handler);
2382 for (i = 0; i <= e - s; ++i) {
2383 if (rdma_cap_ib_sa(device, i + 1))
2384 update_sm_ah(&sa_dev->port[i].update_task);
2391 if (rdma_cap_ib_sa(device, i + 1))
2392 ib_unregister_mad_agent(sa_dev->port[i].agent);
2399 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2401 struct ib_sa_device *sa_dev = client_data;
2404 ib_unregister_event_handler(&sa_dev->event_handler);
2405 flush_workqueue(ib_wq);
2407 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2408 if (rdma_cap_ib_sa(device, i + 1)) {
2409 cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2410 ib_unregister_mad_agent(sa_dev->port[i].agent);
2411 if (sa_dev->port[i].sm_ah)
2412 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2420 int ib_sa_init(void)
2424 get_random_bytes(&tid, sizeof tid);
2426 atomic_set(&ib_nl_sa_request_seq, 0);
2428 ret = ib_register_client(&sa_client);
2430 pr_err("Couldn't register ib_sa client\n");
2436 pr_err("Couldn't initialize multicast handling\n");
2440 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2446 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2453 ib_unregister_client(&sa_client);
2458 void ib_sa_cleanup(void)
2460 cancel_delayed_work(&ib_nl_timed_work);
2461 flush_workqueue(ib_nl_wq);
2462 destroy_workqueue(ib_nl_wq);
2464 ib_unregister_client(&sa_client);
2465 WARN_ON(!xa_empty(&queries));