1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
3 * Copyright (c) 2004-2007 Intel Corporation. All rights reserved.
4 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
5 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
6 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
7 * Copyright (c) 2019, Mellanox Technologies inc. All rights reserved.
10 #include <linux/completion.h>
11 #include <linux/dma-mapping.h>
12 #include <linux/device.h>
13 #include <linux/module.h>
14 #include <linux/err.h>
15 #include <linux/idr.h>
16 #include <linux/interrupt.h>
17 #include <linux/random.h>
18 #include <linux/rbtree.h>
19 #include <linux/spinlock.h>
20 #include <linux/slab.h>
21 #include <linux/sysfs.h>
22 #include <linux/workqueue.h>
23 #include <linux/kdev_t.h>
24 #include <linux/etherdevice.h>
26 #include <rdma/ib_cache.h>
27 #include <rdma/ib_cm.h>
29 #include "core_priv.h"
32 MODULE_AUTHOR("Sean Hefty");
33 MODULE_DESCRIPTION("InfiniBand CM");
34 MODULE_LICENSE("Dual BSD/GPL");
36 static const char * const ibcm_rej_reason_strs[] = {
37 [IB_CM_REJ_NO_QP] = "no QP",
38 [IB_CM_REJ_NO_EEC] = "no EEC",
39 [IB_CM_REJ_NO_RESOURCES] = "no resources",
40 [IB_CM_REJ_TIMEOUT] = "timeout",
41 [IB_CM_REJ_UNSUPPORTED] = "unsupported",
42 [IB_CM_REJ_INVALID_COMM_ID] = "invalid comm ID",
43 [IB_CM_REJ_INVALID_COMM_INSTANCE] = "invalid comm instance",
44 [IB_CM_REJ_INVALID_SERVICE_ID] = "invalid service ID",
45 [IB_CM_REJ_INVALID_TRANSPORT_TYPE] = "invalid transport type",
46 [IB_CM_REJ_STALE_CONN] = "stale conn",
47 [IB_CM_REJ_RDC_NOT_EXIST] = "RDC not exist",
48 [IB_CM_REJ_INVALID_GID] = "invalid GID",
49 [IB_CM_REJ_INVALID_LID] = "invalid LID",
50 [IB_CM_REJ_INVALID_SL] = "invalid SL",
51 [IB_CM_REJ_INVALID_TRAFFIC_CLASS] = "invalid traffic class",
52 [IB_CM_REJ_INVALID_HOP_LIMIT] = "invalid hop limit",
53 [IB_CM_REJ_INVALID_PACKET_RATE] = "invalid packet rate",
54 [IB_CM_REJ_INVALID_ALT_GID] = "invalid alt GID",
55 [IB_CM_REJ_INVALID_ALT_LID] = "invalid alt LID",
56 [IB_CM_REJ_INVALID_ALT_SL] = "invalid alt SL",
57 [IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS] = "invalid alt traffic class",
58 [IB_CM_REJ_INVALID_ALT_HOP_LIMIT] = "invalid alt hop limit",
59 [IB_CM_REJ_INVALID_ALT_PACKET_RATE] = "invalid alt packet rate",
60 [IB_CM_REJ_PORT_CM_REDIRECT] = "port CM redirect",
61 [IB_CM_REJ_PORT_REDIRECT] = "port redirect",
62 [IB_CM_REJ_INVALID_MTU] = "invalid MTU",
63 [IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES] = "insufficient resp resources",
64 [IB_CM_REJ_CONSUMER_DEFINED] = "consumer defined",
65 [IB_CM_REJ_INVALID_RNR_RETRY] = "invalid RNR retry",
66 [IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID] = "duplicate local comm ID",
67 [IB_CM_REJ_INVALID_CLASS_VERSION] = "invalid class version",
68 [IB_CM_REJ_INVALID_FLOW_LABEL] = "invalid flow label",
69 [IB_CM_REJ_INVALID_ALT_FLOW_LABEL] = "invalid alt flow label",
70 [IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED] =
71 "vendor option is not supported",
74 const char *__attribute_const__ ibcm_reject_msg(int reason)
76 size_t index = reason;
78 if (index < ARRAY_SIZE(ibcm_rej_reason_strs) &&
79 ibcm_rej_reason_strs[index])
80 return ibcm_rej_reason_strs[index];
82 return "unrecognized reason";
84 EXPORT_SYMBOL(ibcm_reject_msg);
88 static int cm_add_one(struct ib_device *device);
89 static void cm_remove_one(struct ib_device *device, void *client_data);
90 static void cm_process_work(struct cm_id_private *cm_id_priv,
91 struct cm_work *work);
92 static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv,
93 struct ib_cm_sidr_rep_param *param);
94 static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv,
95 const void *private_data, u8 private_data_len);
96 static int cm_send_drep_locked(struct cm_id_private *cm_id_priv,
97 void *private_data, u8 private_data_len);
98 static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
99 enum ib_cm_rej_reason reason, void *ari,
100 u8 ari_length, const void *private_data,
101 u8 private_data_len);
103 static struct ib_client cm_client = {
106 .remove = cm_remove_one
109 static struct ib_cm {
111 struct list_head device_list;
112 rwlock_t device_lock;
113 struct rb_root listen_service_table;
114 u64 listen_service_id;
115 /* struct rb_root peer_service_table; todo: fix peer to peer */
116 struct rb_root remote_qp_table;
117 struct rb_root remote_id_table;
118 struct rb_root remote_sidr_table;
119 struct xarray local_id_table;
121 __be32 random_id_operand;
122 struct list_head timewait_list;
123 struct workqueue_struct *wq;
124 /* Sync on cm change port state */
125 spinlock_t state_lock;
128 /* Counter indexes ordered by attribute ID */
142 CM_ATTR_ID_OFFSET = 0x0010,
153 static char const counter_group_names[CM_COUNTER_GROUPS]
154 [sizeof("cm_rx_duplicates")] = {
155 "cm_tx_msgs", "cm_tx_retries",
156 "cm_rx_msgs", "cm_rx_duplicates"
159 struct cm_counter_group {
161 atomic_long_t counter[CM_ATTR_COUNT];
164 struct cm_counter_attribute {
165 struct attribute attr;
169 #define CM_COUNTER_ATTR(_name, _index) \
170 struct cm_counter_attribute cm_##_name##_counter_attr = { \
171 .attr = { .name = __stringify(_name), .mode = 0444 }, \
175 static CM_COUNTER_ATTR(req, CM_REQ_COUNTER);
176 static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER);
177 static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER);
178 static CM_COUNTER_ATTR(rep, CM_REP_COUNTER);
179 static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER);
180 static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER);
181 static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER);
182 static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER);
183 static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER);
184 static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER);
185 static CM_COUNTER_ATTR(apr, CM_APR_COUNTER);
187 static struct attribute *cm_counter_default_attrs[] = {
188 &cm_req_counter_attr.attr,
189 &cm_mra_counter_attr.attr,
190 &cm_rej_counter_attr.attr,
191 &cm_rep_counter_attr.attr,
192 &cm_rtu_counter_attr.attr,
193 &cm_dreq_counter_attr.attr,
194 &cm_drep_counter_attr.attr,
195 &cm_sidr_req_counter_attr.attr,
196 &cm_sidr_rep_counter_attr.attr,
197 &cm_lap_counter_attr.attr,
198 &cm_apr_counter_attr.attr,
203 struct cm_device *cm_dev;
204 struct ib_mad_agent *mad_agent;
206 struct list_head cm_priv_prim_list;
207 struct list_head cm_priv_altr_list;
208 struct cm_counter_group counter_group[CM_COUNTER_GROUPS];
212 struct list_head list;
213 struct ib_device *ib_device;
216 struct cm_port *port[];
220 struct cm_port *port;
222 struct rdma_ah_attr ah_attr;
228 struct delayed_work work;
229 struct list_head list;
230 struct cm_port *port;
231 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
232 __be32 local_id; /* Established / timewait */
234 struct ib_cm_event cm_event;
235 struct sa_path_rec path[];
238 struct cm_timewait_info {
240 struct list_head list;
241 struct rb_node remote_qp_node;
242 struct rb_node remote_id_node;
243 __be64 remote_ca_guid;
245 u8 inserted_remote_qp;
246 u8 inserted_remote_id;
249 struct cm_id_private {
252 struct rb_node service_node;
253 struct rb_node sidr_id_node;
254 spinlock_t lock; /* Do not acquire inside cm.lock */
255 struct completion comp;
257 /* Number of clients sharing this ib_cm_id. Only valid for listeners.
258 * Protected by the cm.lock spinlock. */
259 int listen_sharecount;
262 struct ib_mad_send_buf *msg;
263 struct cm_timewait_info *timewait_info;
264 /* todo: use alternate port on send failure */
272 enum ib_qp_type qp_type;
276 enum ib_mtu path_mtu;
280 u8 responder_resources;
287 struct list_head prim_list;
288 struct list_head altr_list;
289 /* Indicates that the send port mad is registered and av is set */
290 int prim_send_port_not_ready;
291 int altr_send_port_not_ready;
293 struct list_head work_list;
296 struct rdma_ucm_ece ece;
299 static void cm_work_handler(struct work_struct *work);
301 static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
303 if (refcount_dec_and_test(&cm_id_priv->refcount))
304 complete(&cm_id_priv->comp);
307 static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
308 struct ib_mad_send_buf **msg)
310 struct ib_mad_agent *mad_agent;
311 struct ib_mad_send_buf *m;
314 unsigned long flags, flags2;
317 /* don't let the port to be released till the agent is down */
318 spin_lock_irqsave(&cm.state_lock, flags2);
319 spin_lock_irqsave(&cm.lock, flags);
320 if (!cm_id_priv->prim_send_port_not_ready)
321 av = &cm_id_priv->av;
322 else if (!cm_id_priv->altr_send_port_not_ready &&
323 (cm_id_priv->alt_av.port))
324 av = &cm_id_priv->alt_av;
326 pr_info("%s: not valid CM id\n", __func__);
328 spin_unlock_irqrestore(&cm.lock, flags);
331 spin_unlock_irqrestore(&cm.lock, flags);
332 /* Make sure the port haven't released the mad yet */
333 mad_agent = cm_id_priv->av.port->mad_agent;
335 pr_info("%s: not a valid MAD agent\n", __func__);
339 ah = rdma_create_ah(mad_agent->qp->pd, &av->ah_attr, 0);
345 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
347 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
349 IB_MGMT_BASE_VERSION);
351 rdma_destroy_ah(ah, 0);
356 /* Timeout set by caller if response is expected. */
358 m->retries = cm_id_priv->max_cm_retries;
360 refcount_inc(&cm_id_priv->refcount);
361 m->context[0] = cm_id_priv;
365 spin_unlock_irqrestore(&cm.state_lock, flags2);
369 static struct ib_mad_send_buf *cm_alloc_response_msg_no_ah(struct cm_port *port,
370 struct ib_mad_recv_wc *mad_recv_wc)
372 return ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
373 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
375 IB_MGMT_BASE_VERSION);
378 static int cm_create_response_msg_ah(struct cm_port *port,
379 struct ib_mad_recv_wc *mad_recv_wc,
380 struct ib_mad_send_buf *msg)
384 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
385 mad_recv_wc->recv_buf.grh, port->port_num);
393 static void cm_free_msg(struct ib_mad_send_buf *msg)
396 rdma_destroy_ah(msg->ah, 0);
398 cm_deref_id(msg->context[0]);
399 ib_free_send_mad(msg);
402 static int cm_alloc_response_msg(struct cm_port *port,
403 struct ib_mad_recv_wc *mad_recv_wc,
404 struct ib_mad_send_buf **msg)
406 struct ib_mad_send_buf *m;
409 m = cm_alloc_response_msg_no_ah(port, mad_recv_wc);
413 ret = cm_create_response_msg_ah(port, mad_recv_wc, m);
423 static void * cm_copy_private_data(const void *private_data,
428 if (!private_data || !private_data_len)
431 data = kmemdup(private_data, private_data_len, GFP_KERNEL);
433 return ERR_PTR(-ENOMEM);
438 static void cm_set_private_data(struct cm_id_private *cm_id_priv,
439 void *private_data, u8 private_data_len)
441 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
442 kfree(cm_id_priv->private_data);
444 cm_id_priv->private_data = private_data;
445 cm_id_priv->private_data_len = private_data_len;
448 static int cm_init_av_for_lap(struct cm_port *port, struct ib_wc *wc,
449 struct ib_grh *grh, struct cm_av *av)
451 struct rdma_ah_attr new_ah_attr;
455 av->pkey_index = wc->pkey_index;
458 * av->ah_attr might be initialized based on past wc during incoming
459 * connect request or while sending out connect request. So initialize
460 * a new ah_attr on stack. If initialization fails, old ah_attr is
461 * used for sending any responses. If initialization is successful,
462 * than new ah_attr is used by overwriting old one.
464 ret = ib_init_ah_attr_from_wc(port->cm_dev->ib_device,
470 rdma_move_ah_attr(&av->ah_attr, &new_ah_attr);
474 static int cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
475 struct ib_grh *grh, struct cm_av *av)
478 av->pkey_index = wc->pkey_index;
479 return ib_init_ah_attr_from_wc(port->cm_dev->ib_device,
484 static void add_cm_id_to_port_list(struct cm_id_private *cm_id_priv,
485 struct cm_av *av, struct cm_port *port)
489 spin_lock_irqsave(&cm.lock, flags);
490 if (&cm_id_priv->av == av)
491 list_add_tail(&cm_id_priv->prim_list, &port->cm_priv_prim_list);
492 else if (&cm_id_priv->alt_av == av)
493 list_add_tail(&cm_id_priv->altr_list, &port->cm_priv_altr_list);
496 spin_unlock_irqrestore(&cm.lock, flags);
499 static struct cm_port *
500 get_cm_port_from_path(struct sa_path_rec *path, const struct ib_gid_attr *attr)
502 struct cm_device *cm_dev;
503 struct cm_port *port = NULL;
507 read_lock_irqsave(&cm.device_lock, flags);
508 list_for_each_entry(cm_dev, &cm.device_list, list) {
509 if (cm_dev->ib_device == attr->device) {
510 port = cm_dev->port[attr->port_num - 1];
514 read_unlock_irqrestore(&cm.device_lock, flags);
516 /* SGID attribute can be NULL in following
518 * (a) Alternative path
519 * (b) IB link layer without GRH
520 * (c) LAP send messages
522 read_lock_irqsave(&cm.device_lock, flags);
523 list_for_each_entry(cm_dev, &cm.device_list, list) {
524 attr = rdma_find_gid(cm_dev->ib_device,
526 sa_conv_pathrec_to_gid_type(path),
529 port = cm_dev->port[attr->port_num - 1];
533 read_unlock_irqrestore(&cm.device_lock, flags);
535 rdma_put_gid_attr(attr);
540 static int cm_init_av_by_path(struct sa_path_rec *path,
541 const struct ib_gid_attr *sgid_attr,
543 struct cm_id_private *cm_id_priv)
545 struct rdma_ah_attr new_ah_attr;
546 struct cm_device *cm_dev;
547 struct cm_port *port;
550 port = get_cm_port_from_path(path, sgid_attr);
553 cm_dev = port->cm_dev;
555 ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num,
556 be16_to_cpu(path->pkey), &av->pkey_index);
563 * av->ah_attr might be initialized based on wc or during
564 * request processing time which might have reference to sgid_attr.
565 * So initialize a new ah_attr on stack.
566 * If initialization fails, old ah_attr is used for sending any
567 * responses. If initialization is successful, than new ah_attr
568 * is used by overwriting the old one. So that right ah_attr
569 * can be used to return an error response.
571 ret = ib_init_ah_attr_from_path(cm_dev->ib_device, port->port_num, path,
572 &new_ah_attr, sgid_attr);
576 av->timeout = path->packet_life_time + 1;
577 add_cm_id_to_port_list(cm_id_priv, av, port);
578 rdma_move_ah_attr(&av->ah_attr, &new_ah_attr);
582 static u32 cm_local_id(__be32 local_id)
584 return (__force u32) (local_id ^ cm.random_id_operand);
587 static struct cm_id_private *cm_acquire_id(__be32 local_id, __be32 remote_id)
589 struct cm_id_private *cm_id_priv;
592 cm_id_priv = xa_load(&cm.local_id_table, cm_local_id(local_id));
593 if (!cm_id_priv || cm_id_priv->id.remote_id != remote_id ||
594 !refcount_inc_not_zero(&cm_id_priv->refcount))
602 * Trivial helpers to strip endian annotation and compare; the
603 * endianness doesn't actually matter since we just need a stable
604 * order for the RB tree.
606 static int be32_lt(__be32 a, __be32 b)
608 return (__force u32) a < (__force u32) b;
611 static int be32_gt(__be32 a, __be32 b)
613 return (__force u32) a > (__force u32) b;
616 static int be64_lt(__be64 a, __be64 b)
618 return (__force u64) a < (__force u64) b;
621 static int be64_gt(__be64 a, __be64 b)
623 return (__force u64) a > (__force u64) b;
627 * Inserts a new cm_id_priv into the listen_service_table. Returns cm_id_priv
628 * if the new ID was inserted, NULL if it could not be inserted due to a
629 * collision, or the existing cm_id_priv ready for shared usage.
631 static struct cm_id_private *cm_insert_listen(struct cm_id_private *cm_id_priv,
632 ib_cm_handler shared_handler)
634 struct rb_node **link = &cm.listen_service_table.rb_node;
635 struct rb_node *parent = NULL;
636 struct cm_id_private *cur_cm_id_priv;
637 __be64 service_id = cm_id_priv->id.service_id;
638 __be64 service_mask = cm_id_priv->id.service_mask;
641 spin_lock_irqsave(&cm.lock, flags);
644 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
646 if ((cur_cm_id_priv->id.service_mask & service_id) ==
647 (service_mask & cur_cm_id_priv->id.service_id) &&
648 (cm_id_priv->id.device == cur_cm_id_priv->id.device)) {
650 * Sharing an ib_cm_id with different handlers is not
653 if (cur_cm_id_priv->id.cm_handler != shared_handler ||
654 cur_cm_id_priv->id.context ||
655 WARN_ON(!cur_cm_id_priv->id.cm_handler)) {
656 spin_unlock_irqrestore(&cm.lock, flags);
659 refcount_inc(&cur_cm_id_priv->refcount);
660 cur_cm_id_priv->listen_sharecount++;
661 spin_unlock_irqrestore(&cm.lock, flags);
662 return cur_cm_id_priv;
665 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
666 link = &(*link)->rb_left;
667 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
668 link = &(*link)->rb_right;
669 else if (be64_lt(service_id, cur_cm_id_priv->id.service_id))
670 link = &(*link)->rb_left;
671 else if (be64_gt(service_id, cur_cm_id_priv->id.service_id))
672 link = &(*link)->rb_right;
674 link = &(*link)->rb_right;
676 cm_id_priv->listen_sharecount++;
677 rb_link_node(&cm_id_priv->service_node, parent, link);
678 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
679 spin_unlock_irqrestore(&cm.lock, flags);
683 static struct cm_id_private * cm_find_listen(struct ib_device *device,
686 struct rb_node *node = cm.listen_service_table.rb_node;
687 struct cm_id_private *cm_id_priv;
690 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
691 if ((cm_id_priv->id.service_mask & service_id) ==
692 cm_id_priv->id.service_id &&
693 (cm_id_priv->id.device == device)) {
694 refcount_inc(&cm_id_priv->refcount);
697 if (device < cm_id_priv->id.device)
698 node = node->rb_left;
699 else if (device > cm_id_priv->id.device)
700 node = node->rb_right;
701 else if (be64_lt(service_id, cm_id_priv->id.service_id))
702 node = node->rb_left;
703 else if (be64_gt(service_id, cm_id_priv->id.service_id))
704 node = node->rb_right;
706 node = node->rb_right;
711 static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
714 struct rb_node **link = &cm.remote_id_table.rb_node;
715 struct rb_node *parent = NULL;
716 struct cm_timewait_info *cur_timewait_info;
717 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
718 __be32 remote_id = timewait_info->work.remote_id;
722 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
724 if (be32_lt(remote_id, cur_timewait_info->work.remote_id))
725 link = &(*link)->rb_left;
726 else if (be32_gt(remote_id, cur_timewait_info->work.remote_id))
727 link = &(*link)->rb_right;
728 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
729 link = &(*link)->rb_left;
730 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
731 link = &(*link)->rb_right;
733 return cur_timewait_info;
735 timewait_info->inserted_remote_id = 1;
736 rb_link_node(&timewait_info->remote_id_node, parent, link);
737 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
741 static struct cm_id_private *cm_find_remote_id(__be64 remote_ca_guid,
744 struct rb_node *node = cm.remote_id_table.rb_node;
745 struct cm_timewait_info *timewait_info;
746 struct cm_id_private *res = NULL;
748 spin_lock_irq(&cm.lock);
750 timewait_info = rb_entry(node, struct cm_timewait_info,
752 if (be32_lt(remote_id, timewait_info->work.remote_id))
753 node = node->rb_left;
754 else if (be32_gt(remote_id, timewait_info->work.remote_id))
755 node = node->rb_right;
756 else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid))
757 node = node->rb_left;
758 else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid))
759 node = node->rb_right;
761 res = cm_acquire_id(timewait_info->work.local_id,
762 timewait_info->work.remote_id);
766 spin_unlock_irq(&cm.lock);
770 static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
773 struct rb_node **link = &cm.remote_qp_table.rb_node;
774 struct rb_node *parent = NULL;
775 struct cm_timewait_info *cur_timewait_info;
776 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
777 __be32 remote_qpn = timewait_info->remote_qpn;
781 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
783 if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn))
784 link = &(*link)->rb_left;
785 else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn))
786 link = &(*link)->rb_right;
787 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
788 link = &(*link)->rb_left;
789 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
790 link = &(*link)->rb_right;
792 return cur_timewait_info;
794 timewait_info->inserted_remote_qp = 1;
795 rb_link_node(&timewait_info->remote_qp_node, parent, link);
796 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
800 static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
803 struct rb_node **link = &cm.remote_sidr_table.rb_node;
804 struct rb_node *parent = NULL;
805 struct cm_id_private *cur_cm_id_priv;
806 union ib_gid *port_gid = &cm_id_priv->av.dgid;
807 __be32 remote_id = cm_id_priv->id.remote_id;
811 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
813 if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id))
814 link = &(*link)->rb_left;
815 else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id))
816 link = &(*link)->rb_right;
819 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
822 link = &(*link)->rb_left;
824 link = &(*link)->rb_right;
826 return cur_cm_id_priv;
829 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
830 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
834 static struct cm_id_private *cm_alloc_id_priv(struct ib_device *device,
835 ib_cm_handler cm_handler,
838 struct cm_id_private *cm_id_priv;
842 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
844 return ERR_PTR(-ENOMEM);
846 cm_id_priv->id.state = IB_CM_IDLE;
847 cm_id_priv->id.device = device;
848 cm_id_priv->id.cm_handler = cm_handler;
849 cm_id_priv->id.context = context;
850 cm_id_priv->id.remote_cm_qpn = 1;
852 RB_CLEAR_NODE(&cm_id_priv->service_node);
853 RB_CLEAR_NODE(&cm_id_priv->sidr_id_node);
854 spin_lock_init(&cm_id_priv->lock);
855 init_completion(&cm_id_priv->comp);
856 INIT_LIST_HEAD(&cm_id_priv->work_list);
857 INIT_LIST_HEAD(&cm_id_priv->prim_list);
858 INIT_LIST_HEAD(&cm_id_priv->altr_list);
859 atomic_set(&cm_id_priv->work_count, -1);
860 refcount_set(&cm_id_priv->refcount, 1);
862 ret = xa_alloc_cyclic_irq(&cm.local_id_table, &id, NULL, xa_limit_32b,
863 &cm.local_id_next, GFP_KERNEL);
866 cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand;
876 * Make the ID visible to the MAD handlers and other threads that use the
879 static void cm_finalize_id(struct cm_id_private *cm_id_priv)
881 xa_store_irq(&cm.local_id_table, cm_local_id(cm_id_priv->id.local_id),
882 cm_id_priv, GFP_KERNEL);
885 struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
886 ib_cm_handler cm_handler,
889 struct cm_id_private *cm_id_priv;
891 cm_id_priv = cm_alloc_id_priv(device, cm_handler, context);
892 if (IS_ERR(cm_id_priv))
893 return ERR_CAST(cm_id_priv);
895 cm_finalize_id(cm_id_priv);
896 return &cm_id_priv->id;
898 EXPORT_SYMBOL(ib_create_cm_id);
900 static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
902 struct cm_work *work;
904 if (list_empty(&cm_id_priv->work_list))
907 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
908 list_del(&work->list);
912 static void cm_free_work(struct cm_work *work)
914 if (work->mad_recv_wc)
915 ib_free_recv_mad(work->mad_recv_wc);
919 static void cm_queue_work_unlock(struct cm_id_private *cm_id_priv,
920 struct cm_work *work)
921 __releases(&cm_id_priv->lock)
926 * To deliver the event to the user callback we have the drop the
927 * spinlock, however, we need to ensure that the user callback is single
928 * threaded and receives events in the temporal order. If there are
929 * already events being processed then thread new events onto a list,
930 * the thread currently processing will pick them up.
932 immediate = atomic_inc_and_test(&cm_id_priv->work_count);
934 list_add_tail(&work->list, &cm_id_priv->work_list);
936 * This routine always consumes incoming reference. Once queued
937 * to the work_list then a reference is held by the thread
938 * currently running cm_process_work() and this reference is not
941 cm_deref_id(cm_id_priv);
943 spin_unlock_irq(&cm_id_priv->lock);
946 cm_process_work(cm_id_priv, work);
949 static inline int cm_convert_to_ms(int iba_time)
951 /* approximate conversion to ms from 4.096us x 2^iba_time */
952 return 1 << max(iba_time - 8, 0);
956 * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time
957 * Because of how ack_timeout is stored, adding one doubles the timeout.
958 * To avoid large timeouts, select the max(ack_delay, life_time + 1), and
959 * increment it (round up) only if the other is within 50%.
961 static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time)
963 int ack_timeout = packet_life_time + 1;
965 if (ack_timeout >= ca_ack_delay)
966 ack_timeout += (ca_ack_delay >= (ack_timeout - 1));
968 ack_timeout = ca_ack_delay +
969 (ack_timeout >= (ca_ack_delay - 1));
971 return min(31, ack_timeout);
974 static void cm_remove_remote(struct cm_id_private *cm_id_priv)
976 struct cm_timewait_info *timewait_info = cm_id_priv->timewait_info;
978 if (timewait_info->inserted_remote_id) {
979 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
980 timewait_info->inserted_remote_id = 0;
983 if (timewait_info->inserted_remote_qp) {
984 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
985 timewait_info->inserted_remote_qp = 0;
989 static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
991 struct cm_timewait_info *timewait_info;
993 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
995 return ERR_PTR(-ENOMEM);
997 timewait_info->work.local_id = local_id;
998 INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
999 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
1000 return timewait_info;
1003 static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
1006 unsigned long flags;
1007 struct cm_device *cm_dev;
1009 lockdep_assert_held(&cm_id_priv->lock);
1011 cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client);
1015 spin_lock_irqsave(&cm.lock, flags);
1016 cm_remove_remote(cm_id_priv);
1017 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
1018 spin_unlock_irqrestore(&cm.lock, flags);
1021 * The cm_id could be destroyed by the user before we exit timewait.
1022 * To protect against this, we search for the cm_id after exiting
1023 * timewait before notifying the user that we've exited timewait.
1025 cm_id_priv->id.state = IB_CM_TIMEWAIT;
1026 wait_time = cm_convert_to_ms(cm_id_priv->av.timeout);
1028 /* Check if the device started its remove_one */
1029 spin_lock_irqsave(&cm.lock, flags);
1030 if (!cm_dev->going_down)
1031 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
1032 msecs_to_jiffies(wait_time));
1033 spin_unlock_irqrestore(&cm.lock, flags);
1036 * The timewait_info is converted into a work and gets freed during
1037 * cm_free_work() in cm_timewait_handler().
1039 BUILD_BUG_ON(offsetof(struct cm_timewait_info, work) != 0);
1040 cm_id_priv->timewait_info = NULL;
1043 static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
1045 unsigned long flags;
1047 lockdep_assert_held(&cm_id_priv->lock);
1049 cm_id_priv->id.state = IB_CM_IDLE;
1050 if (cm_id_priv->timewait_info) {
1051 spin_lock_irqsave(&cm.lock, flags);
1052 cm_remove_remote(cm_id_priv);
1053 spin_unlock_irqrestore(&cm.lock, flags);
1054 kfree(cm_id_priv->timewait_info);
1055 cm_id_priv->timewait_info = NULL;
1059 static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
1061 struct cm_id_private *cm_id_priv;
1062 struct cm_work *work;
1064 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1065 spin_lock_irq(&cm_id_priv->lock);
1067 switch (cm_id->state) {
1069 spin_lock(&cm.lock);
1070 if (--cm_id_priv->listen_sharecount > 0) {
1071 /* The id is still shared. */
1072 WARN_ON(refcount_read(&cm_id_priv->refcount) == 1);
1073 spin_unlock(&cm.lock);
1074 spin_unlock_irq(&cm_id_priv->lock);
1075 cm_deref_id(cm_id_priv);
1078 cm_id->state = IB_CM_IDLE;
1079 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
1080 RB_CLEAR_NODE(&cm_id_priv->service_node);
1081 spin_unlock(&cm.lock);
1083 case IB_CM_SIDR_REQ_SENT:
1084 cm_id->state = IB_CM_IDLE;
1085 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1087 case IB_CM_SIDR_REQ_RCVD:
1088 cm_send_sidr_rep_locked(cm_id_priv,
1089 &(struct ib_cm_sidr_rep_param){
1090 .status = IB_SIDR_REJECT });
1091 /* cm_send_sidr_rep_locked will not move to IDLE if it fails */
1092 cm_id->state = IB_CM_IDLE;
1094 case IB_CM_REQ_SENT:
1095 case IB_CM_MRA_REQ_RCVD:
1096 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1097 cm_send_rej_locked(cm_id_priv, IB_CM_REJ_TIMEOUT,
1098 &cm_id_priv->id.device->node_guid,
1099 sizeof(cm_id_priv->id.device->node_guid),
1102 case IB_CM_REQ_RCVD:
1103 if (err == -ENOMEM) {
1104 /* Do not reject to allow future retries. */
1105 cm_reset_to_idle(cm_id_priv);
1107 cm_send_rej_locked(cm_id_priv,
1108 IB_CM_REJ_CONSUMER_DEFINED, NULL, 0,
1112 case IB_CM_REP_SENT:
1113 case IB_CM_MRA_REP_RCVD:
1114 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1115 cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL,
1118 case IB_CM_MRA_REQ_SENT:
1119 case IB_CM_REP_RCVD:
1120 case IB_CM_MRA_REP_SENT:
1121 cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL,
1124 case IB_CM_ESTABLISHED:
1125 if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
1126 cm_id->state = IB_CM_IDLE;
1129 cm_send_dreq_locked(cm_id_priv, NULL, 0);
1131 case IB_CM_DREQ_SENT:
1132 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
1133 cm_enter_timewait(cm_id_priv);
1135 case IB_CM_DREQ_RCVD:
1136 cm_send_drep_locked(cm_id_priv, NULL, 0);
1137 WARN_ON(cm_id->state != IB_CM_TIMEWAIT);
1139 case IB_CM_TIMEWAIT:
1141 * The cm_acquire_id in cm_timewait_handler will stop working
1142 * once we do xa_erase below, so just move to idle here for
1145 cm_id->state = IB_CM_IDLE;
1150 WARN_ON(cm_id->state != IB_CM_IDLE);
1152 spin_lock(&cm.lock);
1153 /* Required for cleanup paths related cm_req_handler() */
1154 if (cm_id_priv->timewait_info) {
1155 cm_remove_remote(cm_id_priv);
1156 kfree(cm_id_priv->timewait_info);
1157 cm_id_priv->timewait_info = NULL;
1159 if (!list_empty(&cm_id_priv->altr_list) &&
1160 (!cm_id_priv->altr_send_port_not_ready))
1161 list_del(&cm_id_priv->altr_list);
1162 if (!list_empty(&cm_id_priv->prim_list) &&
1163 (!cm_id_priv->prim_send_port_not_ready))
1164 list_del(&cm_id_priv->prim_list);
1165 WARN_ON(cm_id_priv->listen_sharecount);
1166 WARN_ON(!RB_EMPTY_NODE(&cm_id_priv->service_node));
1167 if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node))
1168 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
1169 spin_unlock(&cm.lock);
1170 spin_unlock_irq(&cm_id_priv->lock);
1172 xa_erase_irq(&cm.local_id_table, cm_local_id(cm_id->local_id));
1173 cm_deref_id(cm_id_priv);
1174 wait_for_completion(&cm_id_priv->comp);
1175 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
1178 rdma_destroy_ah_attr(&cm_id_priv->av.ah_attr);
1179 rdma_destroy_ah_attr(&cm_id_priv->alt_av.ah_attr);
1180 kfree(cm_id_priv->private_data);
1181 kfree_rcu(cm_id_priv, rcu);
1184 void ib_destroy_cm_id(struct ib_cm_id *cm_id)
1186 cm_destroy_id(cm_id, 0);
1188 EXPORT_SYMBOL(ib_destroy_cm_id);
1190 static int cm_init_listen(struct cm_id_private *cm_id_priv, __be64 service_id,
1191 __be64 service_mask)
1193 service_mask = service_mask ? service_mask : ~cpu_to_be64(0);
1194 service_id &= service_mask;
1195 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
1196 (service_id != IB_CM_ASSIGN_SERVICE_ID))
1199 if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
1200 cm_id_priv->id.service_id = cpu_to_be64(cm.listen_service_id++);
1201 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
1203 cm_id_priv->id.service_id = service_id;
1204 cm_id_priv->id.service_mask = service_mask;
1210 * ib_cm_listen - Initiates listening on the specified service ID for
1211 * connection and service ID resolution requests.
1212 * @cm_id: Connection identifier associated with the listen request.
1213 * @service_id: Service identifier matched against incoming connection
1214 * and service ID resolution requests. The service ID should be specified
1215 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
1216 * assign a service ID to the caller.
1217 * @service_mask: Mask applied to service ID used to listen across a
1218 * range of service IDs. If set to 0, the service ID is matched
1219 * exactly. This parameter is ignored if %service_id is set to
1220 * IB_CM_ASSIGN_SERVICE_ID.
1222 int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask)
1224 struct cm_id_private *cm_id_priv =
1225 container_of(cm_id, struct cm_id_private, id);
1226 unsigned long flags;
1229 spin_lock_irqsave(&cm_id_priv->lock, flags);
1230 if (cm_id_priv->id.state != IB_CM_IDLE) {
1235 ret = cm_init_listen(cm_id_priv, service_id, service_mask);
1239 if (!cm_insert_listen(cm_id_priv, NULL)) {
1244 cm_id_priv->id.state = IB_CM_LISTEN;
1248 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1251 EXPORT_SYMBOL(ib_cm_listen);
1254 * Create a new listening ib_cm_id and listen on the given service ID.
1256 * If there's an existing ID listening on that same device and service ID,
1259 * @device: Device associated with the cm_id. All related communication will
1260 * be associated with the specified device.
1261 * @cm_handler: Callback invoked to notify the user of CM events.
1262 * @service_id: Service identifier matched against incoming connection
1263 * and service ID resolution requests. The service ID should be specified
1264 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
1265 * assign a service ID to the caller.
1267 * Callers should call ib_destroy_cm_id when done with the listener ID.
1269 struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
1270 ib_cm_handler cm_handler,
1273 struct cm_id_private *listen_id_priv;
1274 struct cm_id_private *cm_id_priv;
1277 /* Create an ID in advance, since the creation may sleep */
1278 cm_id_priv = cm_alloc_id_priv(device, cm_handler, NULL);
1279 if (IS_ERR(cm_id_priv))
1280 return ERR_CAST(cm_id_priv);
1282 err = cm_init_listen(cm_id_priv, service_id, 0);
1284 return ERR_PTR(err);
1286 spin_lock_irq(&cm_id_priv->lock);
1287 listen_id_priv = cm_insert_listen(cm_id_priv, cm_handler);
1288 if (listen_id_priv != cm_id_priv) {
1289 spin_unlock_irq(&cm_id_priv->lock);
1290 ib_destroy_cm_id(&cm_id_priv->id);
1291 if (!listen_id_priv)
1292 return ERR_PTR(-EINVAL);
1293 return &listen_id_priv->id;
1295 cm_id_priv->id.state = IB_CM_LISTEN;
1296 spin_unlock_irq(&cm_id_priv->lock);
1299 * A listen ID does not need to be in the xarray since it does not
1300 * receive mads, is not placed in the remote_id or remote_qpn rbtree,
1301 * and does not enter timewait.
1304 return &cm_id_priv->id;
1306 EXPORT_SYMBOL(ib_cm_insert_listen);
1308 static __be64 cm_form_tid(struct cm_id_private *cm_id_priv)
1310 u64 hi_tid, low_tid;
1312 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
1313 low_tid = (u64)cm_id_priv->id.local_id;
1314 return cpu_to_be64(hi_tid | low_tid);
1317 static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
1318 __be16 attr_id, __be64 tid)
1320 hdr->base_version = IB_MGMT_BASE_VERSION;
1321 hdr->mgmt_class = IB_MGMT_CLASS_CM;
1322 hdr->class_version = IB_CM_CLASS_VERSION;
1323 hdr->method = IB_MGMT_METHOD_SEND;
1324 hdr->attr_id = attr_id;
1328 static void cm_format_mad_ece_hdr(struct ib_mad_hdr *hdr, __be16 attr_id,
1329 __be64 tid, u32 attr_mod)
1331 cm_format_mad_hdr(hdr, attr_id, tid);
1332 hdr->attr_mod = cpu_to_be32(attr_mod);
1335 static void cm_format_req(struct cm_req_msg *req_msg,
1336 struct cm_id_private *cm_id_priv,
1337 struct ib_cm_req_param *param)
1339 struct sa_path_rec *pri_path = param->primary_path;
1340 struct sa_path_rec *alt_path = param->alternate_path;
1341 bool pri_ext = false;
1343 if (pri_path->rec_type == SA_PATH_REC_TYPE_OPA)
1344 pri_ext = opa_is_extended_lid(pri_path->opa.dlid,
1345 pri_path->opa.slid);
1347 cm_format_mad_ece_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
1348 cm_form_tid(cm_id_priv), param->ece.attr_mod);
1350 IBA_SET(CM_REQ_LOCAL_COMM_ID, req_msg,
1351 be32_to_cpu(cm_id_priv->id.local_id));
1352 IBA_SET(CM_REQ_SERVICE_ID, req_msg, be64_to_cpu(param->service_id));
1353 IBA_SET(CM_REQ_LOCAL_CA_GUID, req_msg,
1354 be64_to_cpu(cm_id_priv->id.device->node_guid));
1355 IBA_SET(CM_REQ_LOCAL_QPN, req_msg, param->qp_num);
1356 IBA_SET(CM_REQ_INITIATOR_DEPTH, req_msg, param->initiator_depth);
1357 IBA_SET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg,
1358 param->remote_cm_response_timeout);
1359 cm_req_set_qp_type(req_msg, param->qp_type);
1360 IBA_SET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg, param->flow_control);
1361 IBA_SET(CM_REQ_STARTING_PSN, req_msg, param->starting_psn);
1362 IBA_SET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg,
1363 param->local_cm_response_timeout);
1364 IBA_SET(CM_REQ_PARTITION_KEY, req_msg,
1365 be16_to_cpu(param->primary_path->pkey));
1366 IBA_SET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg,
1367 param->primary_path->mtu);
1368 IBA_SET(CM_REQ_MAX_CM_RETRIES, req_msg, param->max_cm_retries);
1370 if (param->qp_type != IB_QPT_XRC_INI) {
1371 IBA_SET(CM_REQ_RESPONDER_RESOURCES, req_msg,
1372 param->responder_resources);
1373 IBA_SET(CM_REQ_RETRY_COUNT, req_msg, param->retry_count);
1374 IBA_SET(CM_REQ_RNR_RETRY_COUNT, req_msg,
1375 param->rnr_retry_count);
1376 IBA_SET(CM_REQ_SRQ, req_msg, param->srq);
1379 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg) =
1381 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg) =
1384 IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg)
1385 ->global.interface_id =
1386 OPA_MAKE_ID(be32_to_cpu(pri_path->opa.slid));
1387 IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg)
1388 ->global.interface_id =
1389 OPA_MAKE_ID(be32_to_cpu(pri_path->opa.dlid));
1391 if (pri_path->hop_limit <= 1) {
1392 IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
1393 be16_to_cpu(pri_ext ? 0 :
1394 htons(ntohl(sa_path_get_slid(
1396 IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
1397 be16_to_cpu(pri_ext ? 0 :
1398 htons(ntohl(sa_path_get_dlid(
1401 /* Work-around until there's a way to obtain remote LID info */
1402 IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
1403 be16_to_cpu(IB_LID_PERMISSIVE));
1404 IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
1405 be16_to_cpu(IB_LID_PERMISSIVE));
1407 IBA_SET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg,
1408 be32_to_cpu(pri_path->flow_label));
1409 IBA_SET(CM_REQ_PRIMARY_PACKET_RATE, req_msg, pri_path->rate);
1410 IBA_SET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg, pri_path->traffic_class);
1411 IBA_SET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg, pri_path->hop_limit);
1412 IBA_SET(CM_REQ_PRIMARY_SL, req_msg, pri_path->sl);
1413 IBA_SET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg,
1414 (pri_path->hop_limit <= 1));
1415 IBA_SET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg,
1416 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
1417 pri_path->packet_life_time));
1420 bool alt_ext = false;
1422 if (alt_path->rec_type == SA_PATH_REC_TYPE_OPA)
1423 alt_ext = opa_is_extended_lid(alt_path->opa.dlid,
1424 alt_path->opa.slid);
1426 *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg) =
1428 *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg) =
1431 IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID,
1433 ->global.interface_id =
1434 OPA_MAKE_ID(be32_to_cpu(alt_path->opa.slid));
1435 IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID,
1437 ->global.interface_id =
1438 OPA_MAKE_ID(be32_to_cpu(alt_path->opa.dlid));
1440 if (alt_path->hop_limit <= 1) {
1441 IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
1444 htons(ntohl(sa_path_get_slid(
1446 IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
1449 htons(ntohl(sa_path_get_dlid(
1452 IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
1453 be16_to_cpu(IB_LID_PERMISSIVE));
1454 IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
1455 be16_to_cpu(IB_LID_PERMISSIVE));
1457 IBA_SET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg,
1458 be32_to_cpu(alt_path->flow_label));
1459 IBA_SET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg, alt_path->rate);
1460 IBA_SET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg,
1461 alt_path->traffic_class);
1462 IBA_SET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg,
1463 alt_path->hop_limit);
1464 IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, alt_path->sl);
1465 IBA_SET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg,
1466 (alt_path->hop_limit <= 1));
1467 IBA_SET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg,
1468 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
1469 alt_path->packet_life_time));
1471 IBA_SET(CM_REQ_VENDOR_ID, req_msg, param->ece.vendor_id);
1473 if (param->private_data && param->private_data_len)
1474 IBA_SET_MEM(CM_REQ_PRIVATE_DATA, req_msg, param->private_data,
1475 param->private_data_len);
1478 static int cm_validate_req_param(struct ib_cm_req_param *param)
1480 if (!param->primary_path)
1483 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC &&
1484 param->qp_type != IB_QPT_XRC_INI)
1487 if (param->private_data &&
1488 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
1491 if (param->alternate_path &&
1492 (param->alternate_path->pkey != param->primary_path->pkey ||
1493 param->alternate_path->mtu != param->primary_path->mtu))
1499 int ib_send_cm_req(struct ib_cm_id *cm_id,
1500 struct ib_cm_req_param *param)
1502 struct cm_id_private *cm_id_priv;
1503 struct cm_req_msg *req_msg;
1504 unsigned long flags;
1507 ret = cm_validate_req_param(param);
1511 /* Verify that we're not in timewait. */
1512 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1513 spin_lock_irqsave(&cm_id_priv->lock, flags);
1514 if (cm_id->state != IB_CM_IDLE || WARN_ON(cm_id_priv->timewait_info)) {
1515 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1519 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1521 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1523 if (IS_ERR(cm_id_priv->timewait_info)) {
1524 ret = PTR_ERR(cm_id_priv->timewait_info);
1528 ret = cm_init_av_by_path(param->primary_path,
1529 param->ppath_sgid_attr, &cm_id_priv->av,
1533 if (param->alternate_path) {
1534 ret = cm_init_av_by_path(param->alternate_path, NULL,
1535 &cm_id_priv->alt_av, cm_id_priv);
1539 cm_id->service_id = param->service_id;
1540 cm_id->service_mask = ~cpu_to_be64(0);
1541 cm_id_priv->timeout_ms = cm_convert_to_ms(
1542 param->primary_path->packet_life_time) * 2 +
1544 param->remote_cm_response_timeout);
1545 cm_id_priv->max_cm_retries = param->max_cm_retries;
1546 cm_id_priv->initiator_depth = param->initiator_depth;
1547 cm_id_priv->responder_resources = param->responder_resources;
1548 cm_id_priv->retry_count = param->retry_count;
1549 cm_id_priv->path_mtu = param->primary_path->mtu;
1550 cm_id_priv->pkey = param->primary_path->pkey;
1551 cm_id_priv->qp_type = param->qp_type;
1553 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
1557 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
1558 cm_format_req(req_msg, cm_id_priv, param);
1559 cm_id_priv->tid = req_msg->hdr.tid;
1560 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
1561 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
1563 cm_id_priv->local_qpn = cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg));
1564 cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg));
1566 trace_icm_send_req(&cm_id_priv->id);
1567 spin_lock_irqsave(&cm_id_priv->lock, flags);
1568 ret = ib_post_send_mad(cm_id_priv->msg, NULL);
1570 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1573 BUG_ON(cm_id->state != IB_CM_IDLE);
1574 cm_id->state = IB_CM_REQ_SENT;
1575 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1578 error2: cm_free_msg(cm_id_priv->msg);
1581 EXPORT_SYMBOL(ib_send_cm_req);
1583 static int cm_issue_rej(struct cm_port *port,
1584 struct ib_mad_recv_wc *mad_recv_wc,
1585 enum ib_cm_rej_reason reason,
1586 enum cm_msg_response msg_rejected,
1587 void *ari, u8 ari_length)
1589 struct ib_mad_send_buf *msg = NULL;
1590 struct cm_rej_msg *rej_msg, *rcv_msg;
1593 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
1597 /* We just need common CM header information. Cast to any message. */
1598 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1599 rej_msg = (struct cm_rej_msg *) msg->mad;
1601 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
1602 IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg,
1603 IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg));
1604 IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
1605 IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg));
1606 IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, msg_rejected);
1607 IBA_SET(CM_REJ_REASON, rej_msg, reason);
1609 if (ari && ari_length) {
1610 IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length);
1611 IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length);
1614 trace_icm_issue_rej(
1615 IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg),
1616 IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg));
1617 ret = ib_post_send_mad(msg, NULL);
1624 static bool cm_req_has_alt_path(struct cm_req_msg *req_msg)
1626 return ((cpu_to_be16(
1627 IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg))) ||
1628 (ib_is_opa_gid(IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID,
1632 static void cm_path_set_rec_type(struct ib_device *ib_device, u8 port_num,
1633 struct sa_path_rec *path, union ib_gid *gid)
1635 if (ib_is_opa_gid(gid) && rdma_cap_opa_ah(ib_device, port_num))
1636 path->rec_type = SA_PATH_REC_TYPE_OPA;
1638 path->rec_type = SA_PATH_REC_TYPE_IB;
1641 static void cm_format_path_lid_from_req(struct cm_req_msg *req_msg,
1642 struct sa_path_rec *primary_path,
1643 struct sa_path_rec *alt_path)
1647 if (primary_path->rec_type != SA_PATH_REC_TYPE_OPA) {
1648 sa_path_set_dlid(primary_path,
1649 IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID,
1651 sa_path_set_slid(primary_path,
1652 IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID,
1655 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1656 CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg));
1657 sa_path_set_dlid(primary_path, lid);
1659 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1660 CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg));
1661 sa_path_set_slid(primary_path, lid);
1664 if (!cm_req_has_alt_path(req_msg))
1667 if (alt_path->rec_type != SA_PATH_REC_TYPE_OPA) {
1668 sa_path_set_dlid(alt_path,
1669 IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID,
1671 sa_path_set_slid(alt_path,
1672 IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID,
1675 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1676 CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg));
1677 sa_path_set_dlid(alt_path, lid);
1679 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1680 CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg));
1681 sa_path_set_slid(alt_path, lid);
1685 static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
1686 struct sa_path_rec *primary_path,
1687 struct sa_path_rec *alt_path)
1689 primary_path->dgid =
1690 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg);
1691 primary_path->sgid =
1692 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg);
1693 primary_path->flow_label =
1694 cpu_to_be32(IBA_GET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg));
1695 primary_path->hop_limit = IBA_GET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg);
1696 primary_path->traffic_class =
1697 IBA_GET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg);
1698 primary_path->reversible = 1;
1699 primary_path->pkey =
1700 cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
1701 primary_path->sl = IBA_GET(CM_REQ_PRIMARY_SL, req_msg);
1702 primary_path->mtu_selector = IB_SA_EQ;
1703 primary_path->mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
1704 primary_path->rate_selector = IB_SA_EQ;
1705 primary_path->rate = IBA_GET(CM_REQ_PRIMARY_PACKET_RATE, req_msg);
1706 primary_path->packet_life_time_selector = IB_SA_EQ;
1707 primary_path->packet_life_time =
1708 IBA_GET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg);
1709 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
1710 primary_path->service_id =
1711 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
1712 if (sa_path_is_roce(primary_path))
1713 primary_path->roce.route_resolved = false;
1715 if (cm_req_has_alt_path(req_msg)) {
1716 alt_path->dgid = *IBA_GET_MEM_PTR(
1717 CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg);
1718 alt_path->sgid = *IBA_GET_MEM_PTR(
1719 CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg);
1720 alt_path->flow_label = cpu_to_be32(
1721 IBA_GET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg));
1722 alt_path->hop_limit =
1723 IBA_GET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg);
1724 alt_path->traffic_class =
1725 IBA_GET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg);
1726 alt_path->reversible = 1;
1728 cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
1729 alt_path->sl = IBA_GET(CM_REQ_ALTERNATE_SL, req_msg);
1730 alt_path->mtu_selector = IB_SA_EQ;
1732 IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
1733 alt_path->rate_selector = IB_SA_EQ;
1734 alt_path->rate = IBA_GET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg);
1735 alt_path->packet_life_time_selector = IB_SA_EQ;
1736 alt_path->packet_life_time =
1737 IBA_GET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg);
1738 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
1739 alt_path->service_id =
1740 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
1742 if (sa_path_is_roce(alt_path))
1743 alt_path->roce.route_resolved = false;
1745 cm_format_path_lid_from_req(req_msg, primary_path, alt_path);
1748 static u16 cm_get_bth_pkey(struct cm_work *work)
1750 struct ib_device *ib_dev = work->port->cm_dev->ib_device;
1751 u8 port_num = work->port->port_num;
1752 u16 pkey_index = work->mad_recv_wc->wc->pkey_index;
1756 ret = ib_get_cached_pkey(ib_dev, port_num, pkey_index, &pkey);
1758 dev_warn_ratelimited(&ib_dev->dev, "ib_cm: Couldn't retrieve pkey for incoming request (port %d, pkey index %d). %d\n",
1759 port_num, pkey_index, ret);
1767 * Convert OPA SGID to IB SGID
1768 * ULPs (such as IPoIB) do not understand OPA GIDs and will
1769 * reject them as the local_gid will not match the sgid. Therefore,
1770 * change the pathrec's SGID to an IB SGID.
1772 * @work: Work completion
1773 * @path: Path record
1775 static void cm_opa_to_ib_sgid(struct cm_work *work,
1776 struct sa_path_rec *path)
1778 struct ib_device *dev = work->port->cm_dev->ib_device;
1779 u8 port_num = work->port->port_num;
1781 if (rdma_cap_opa_ah(dev, port_num) &&
1782 (ib_is_opa_gid(&path->sgid))) {
1785 if (rdma_query_gid(dev, port_num, 0, &sgid)) {
1787 "Error updating sgid in CM request\n");
1795 static void cm_format_req_event(struct cm_work *work,
1796 struct cm_id_private *cm_id_priv,
1797 struct ib_cm_id *listen_id)
1799 struct cm_req_msg *req_msg;
1800 struct ib_cm_req_event_param *param;
1802 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1803 param = &work->cm_event.param.req_rcvd;
1804 param->listen_id = listen_id;
1805 param->bth_pkey = cm_get_bth_pkey(work);
1806 param->port = cm_id_priv->av.port->port_num;
1807 param->primary_path = &work->path[0];
1808 cm_opa_to_ib_sgid(work, param->primary_path);
1809 if (cm_req_has_alt_path(req_msg)) {
1810 param->alternate_path = &work->path[1];
1811 cm_opa_to_ib_sgid(work, param->alternate_path);
1813 param->alternate_path = NULL;
1815 param->remote_ca_guid =
1816 cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg));
1817 param->remote_qkey = IBA_GET(CM_REQ_LOCAL_Q_KEY, req_msg);
1818 param->remote_qpn = IBA_GET(CM_REQ_LOCAL_QPN, req_msg);
1819 param->qp_type = cm_req_get_qp_type(req_msg);
1820 param->starting_psn = IBA_GET(CM_REQ_STARTING_PSN, req_msg);
1821 param->responder_resources = IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg);
1822 param->initiator_depth = IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg);
1823 param->local_cm_response_timeout =
1824 IBA_GET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg);
1825 param->flow_control = IBA_GET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg);
1826 param->remote_cm_response_timeout =
1827 IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg);
1828 param->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg);
1829 param->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg);
1830 param->srq = IBA_GET(CM_REQ_SRQ, req_msg);
1831 param->ppath_sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr;
1832 param->ece.vendor_id = IBA_GET(CM_REQ_VENDOR_ID, req_msg);
1833 param->ece.attr_mod = be32_to_cpu(req_msg->hdr.attr_mod);
1835 work->cm_event.private_data =
1836 IBA_GET_MEM_PTR(CM_REQ_PRIVATE_DATA, req_msg);
1839 static void cm_process_work(struct cm_id_private *cm_id_priv,
1840 struct cm_work *work)
1844 /* We will typically only have the current event to report. */
1845 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1848 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
1849 spin_lock_irq(&cm_id_priv->lock);
1850 work = cm_dequeue_work(cm_id_priv);
1851 spin_unlock_irq(&cm_id_priv->lock);
1855 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1859 cm_deref_id(cm_id_priv);
1861 cm_destroy_id(&cm_id_priv->id, ret);
1864 static void cm_format_mra(struct cm_mra_msg *mra_msg,
1865 struct cm_id_private *cm_id_priv,
1866 enum cm_msg_response msg_mraed, u8 service_timeout,
1867 const void *private_data, u8 private_data_len)
1869 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
1870 IBA_SET(CM_MRA_MESSAGE_MRAED, mra_msg, msg_mraed);
1871 IBA_SET(CM_MRA_LOCAL_COMM_ID, mra_msg,
1872 be32_to_cpu(cm_id_priv->id.local_id));
1873 IBA_SET(CM_MRA_REMOTE_COMM_ID, mra_msg,
1874 be32_to_cpu(cm_id_priv->id.remote_id));
1875 IBA_SET(CM_MRA_SERVICE_TIMEOUT, mra_msg, service_timeout);
1877 if (private_data && private_data_len)
1878 IBA_SET_MEM(CM_MRA_PRIVATE_DATA, mra_msg, private_data,
1882 static void cm_format_rej(struct cm_rej_msg *rej_msg,
1883 struct cm_id_private *cm_id_priv,
1884 enum ib_cm_rej_reason reason, void *ari,
1885 u8 ari_length, const void *private_data,
1886 u8 private_data_len, enum ib_cm_state state)
1888 lockdep_assert_held(&cm_id_priv->lock);
1890 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
1891 IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg,
1892 be32_to_cpu(cm_id_priv->id.remote_id));
1895 case IB_CM_REQ_RCVD:
1896 IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(0));
1897 IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ);
1899 case IB_CM_MRA_REQ_SENT:
1900 IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
1901 be32_to_cpu(cm_id_priv->id.local_id));
1902 IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ);
1904 case IB_CM_REP_RCVD:
1905 case IB_CM_MRA_REP_SENT:
1906 IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
1907 be32_to_cpu(cm_id_priv->id.local_id));
1908 IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REP);
1911 IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
1912 be32_to_cpu(cm_id_priv->id.local_id));
1913 IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg,
1914 CM_MSG_RESPONSE_OTHER);
1918 IBA_SET(CM_REJ_REASON, rej_msg, reason);
1919 if (ari && ari_length) {
1920 IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length);
1921 IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length);
1924 if (private_data && private_data_len)
1925 IBA_SET_MEM(CM_REJ_PRIVATE_DATA, rej_msg, private_data,
1929 static void cm_dup_req_handler(struct cm_work *work,
1930 struct cm_id_private *cm_id_priv)
1932 struct ib_mad_send_buf *msg = NULL;
1935 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
1936 counter[CM_REQ_COUNTER]);
1938 /* Quick state check to discard duplicate REQs. */
1939 spin_lock_irq(&cm_id_priv->lock);
1940 if (cm_id_priv->id.state == IB_CM_REQ_RCVD) {
1941 spin_unlock_irq(&cm_id_priv->lock);
1944 spin_unlock_irq(&cm_id_priv->lock);
1946 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
1950 spin_lock_irq(&cm_id_priv->lock);
1951 switch (cm_id_priv->id.state) {
1952 case IB_CM_MRA_REQ_SENT:
1953 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
1954 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
1955 cm_id_priv->private_data,
1956 cm_id_priv->private_data_len);
1958 case IB_CM_TIMEWAIT:
1959 cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv,
1960 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0,
1966 spin_unlock_irq(&cm_id_priv->lock);
1968 trace_icm_send_dup_req(&cm_id_priv->id);
1969 ret = ib_post_send_mad(msg, NULL);
1974 unlock: spin_unlock_irq(&cm_id_priv->lock);
1975 free: cm_free_msg(msg);
1978 static struct cm_id_private * cm_match_req(struct cm_work *work,
1979 struct cm_id_private *cm_id_priv)
1981 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1982 struct cm_timewait_info *timewait_info;
1983 struct cm_req_msg *req_msg;
1985 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1987 /* Check for possible duplicate REQ. */
1988 spin_lock_irq(&cm.lock);
1989 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
1990 if (timewait_info) {
1991 cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
1992 timewait_info->work.remote_id);
1993 spin_unlock_irq(&cm.lock);
1994 if (cur_cm_id_priv) {
1995 cm_dup_req_handler(work, cur_cm_id_priv);
1996 cm_deref_id(cur_cm_id_priv);
2001 /* Check for stale connections. */
2002 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
2003 if (timewait_info) {
2004 cm_remove_remote(cm_id_priv);
2005 cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2006 timewait_info->work.remote_id);
2008 spin_unlock_irq(&cm.lock);
2009 cm_issue_rej(work->port, work->mad_recv_wc,
2010 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
2012 if (cur_cm_id_priv) {
2013 ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0);
2014 cm_deref_id(cur_cm_id_priv);
2019 /* Find matching listen request. */
2020 listen_cm_id_priv = cm_find_listen(
2021 cm_id_priv->id.device,
2022 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)));
2023 if (!listen_cm_id_priv) {
2024 cm_remove_remote(cm_id_priv);
2025 spin_unlock_irq(&cm.lock);
2026 cm_issue_rej(work->port, work->mad_recv_wc,
2027 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
2031 spin_unlock_irq(&cm.lock);
2032 return listen_cm_id_priv;
2036 * Work-around for inter-subnet connections. If the LIDs are permissive,
2037 * we need to override the LID/SL data in the REQ with the LID information
2038 * in the work completion.
2040 static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
2042 if (!IBA_GET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg)) {
2043 if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID,
2044 req_msg)) == IB_LID_PERMISSIVE) {
2045 IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
2046 be16_to_cpu(ib_lid_be16(wc->slid)));
2047 IBA_SET(CM_REQ_PRIMARY_SL, req_msg, wc->sl);
2050 if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID,
2051 req_msg)) == IB_LID_PERMISSIVE)
2052 IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
2053 wc->dlid_path_bits);
2056 if (!IBA_GET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg)) {
2057 if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID,
2058 req_msg)) == IB_LID_PERMISSIVE) {
2059 IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
2060 be16_to_cpu(ib_lid_be16(wc->slid)));
2061 IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, wc->sl);
2064 if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID,
2065 req_msg)) == IB_LID_PERMISSIVE)
2066 IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
2067 wc->dlid_path_bits);
2071 static int cm_req_handler(struct cm_work *work)
2073 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
2074 struct cm_req_msg *req_msg;
2075 const struct ib_global_route *grh;
2076 const struct ib_gid_attr *gid_attr;
2079 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
2082 cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL);
2083 if (IS_ERR(cm_id_priv))
2084 return PTR_ERR(cm_id_priv);
2086 cm_id_priv->id.remote_id =
2087 cpu_to_be32(IBA_GET(CM_REQ_LOCAL_COMM_ID, req_msg));
2088 cm_id_priv->id.service_id =
2089 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
2090 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
2091 cm_id_priv->tid = req_msg->hdr.tid;
2092 cm_id_priv->timeout_ms = cm_convert_to_ms(
2093 IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg));
2094 cm_id_priv->max_cm_retries = IBA_GET(CM_REQ_MAX_CM_RETRIES, req_msg);
2095 cm_id_priv->remote_qpn =
2096 cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg));
2097 cm_id_priv->initiator_depth =
2098 IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg);
2099 cm_id_priv->responder_resources =
2100 IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg);
2101 cm_id_priv->path_mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
2102 cm_id_priv->pkey = cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
2103 cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg));
2104 cm_id_priv->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg);
2105 cm_id_priv->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg);
2106 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
2108 ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2109 work->mad_recv_wc->recv_buf.grh,
2113 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
2115 if (IS_ERR(cm_id_priv->timewait_info)) {
2116 ret = PTR_ERR(cm_id_priv->timewait_info);
2119 cm_id_priv->timewait_info->work.remote_id = cm_id_priv->id.remote_id;
2120 cm_id_priv->timewait_info->remote_ca_guid =
2121 cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg));
2122 cm_id_priv->timewait_info->remote_qpn = cm_id_priv->remote_qpn;
2125 * Note that the ID pointer is not in the xarray at this point,
2126 * so this set is only visible to the local thread.
2128 cm_id_priv->id.state = IB_CM_REQ_RCVD;
2130 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
2131 if (!listen_cm_id_priv) {
2132 trace_icm_no_listener_err(&cm_id_priv->id);
2133 cm_id_priv->id.state = IB_CM_IDLE;
2138 cm_process_routed_req(req_msg, work->mad_recv_wc->wc);
2140 memset(&work->path[0], 0, sizeof(work->path[0]));
2141 if (cm_req_has_alt_path(req_msg))
2142 memset(&work->path[1], 0, sizeof(work->path[1]));
2143 grh = rdma_ah_read_grh(&cm_id_priv->av.ah_attr);
2144 gid_attr = grh->sgid_attr;
2147 rdma_protocol_roce(work->port->cm_dev->ib_device,
2148 work->port->port_num)) {
2149 work->path[0].rec_type =
2150 sa_conv_gid_to_pathrec_type(gid_attr->gid_type);
2152 cm_path_set_rec_type(
2153 work->port->cm_dev->ib_device, work->port->port_num,
2155 IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID,
2158 if (cm_req_has_alt_path(req_msg))
2159 work->path[1].rec_type = work->path[0].rec_type;
2160 cm_format_paths_from_req(req_msg, &work->path[0],
2162 if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE)
2163 sa_path_set_dmac(&work->path[0],
2164 cm_id_priv->av.ah_attr.roce.dmac);
2165 work->path[0].hop_limit = grh->hop_limit;
2166 ret = cm_init_av_by_path(&work->path[0], gid_attr, &cm_id_priv->av,
2171 err = rdma_query_gid(work->port->cm_dev->ib_device,
2172 work->port->port_num, 0,
2173 &work->path[0].sgid);
2175 ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID,
2178 ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID,
2179 &work->path[0].sgid,
2180 sizeof(work->path[0].sgid),
2184 if (cm_req_has_alt_path(req_msg)) {
2185 ret = cm_init_av_by_path(&work->path[1], NULL,
2186 &cm_id_priv->alt_av, cm_id_priv);
2188 ib_send_cm_rej(&cm_id_priv->id,
2189 IB_CM_REJ_INVALID_ALT_GID,
2190 &work->path[0].sgid,
2191 sizeof(work->path[0].sgid), NULL, 0);
2196 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
2197 cm_id_priv->id.context = listen_cm_id_priv->id.context;
2198 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
2200 /* Now MAD handlers can see the new ID */
2201 spin_lock_irq(&cm_id_priv->lock);
2202 cm_finalize_id(cm_id_priv);
2204 /* Refcount belongs to the event, pairs with cm_process_work() */
2205 refcount_inc(&cm_id_priv->refcount);
2206 cm_queue_work_unlock(cm_id_priv, work);
2208 * Since this ID was just created and was not made visible to other MAD
2209 * handlers until the cm_finalize_id() above we know that the
2210 * cm_process_work() will deliver the event and the listen_cm_id
2211 * embedded in the event can be derefed here.
2213 cm_deref_id(listen_cm_id_priv);
2217 cm_deref_id(listen_cm_id_priv);
2219 ib_destroy_cm_id(&cm_id_priv->id);
2223 static void cm_format_rep(struct cm_rep_msg *rep_msg,
2224 struct cm_id_private *cm_id_priv,
2225 struct ib_cm_rep_param *param)
2227 cm_format_mad_ece_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid,
2228 param->ece.attr_mod);
2229 IBA_SET(CM_REP_LOCAL_COMM_ID, rep_msg,
2230 be32_to_cpu(cm_id_priv->id.local_id));
2231 IBA_SET(CM_REP_REMOTE_COMM_ID, rep_msg,
2232 be32_to_cpu(cm_id_priv->id.remote_id));
2233 IBA_SET(CM_REP_STARTING_PSN, rep_msg, param->starting_psn);
2234 IBA_SET(CM_REP_RESPONDER_RESOURCES, rep_msg,
2235 param->responder_resources);
2236 IBA_SET(CM_REP_TARGET_ACK_DELAY, rep_msg,
2237 cm_id_priv->av.port->cm_dev->ack_delay);
2238 IBA_SET(CM_REP_FAILOVER_ACCEPTED, rep_msg, param->failover_accepted);
2239 IBA_SET(CM_REP_RNR_RETRY_COUNT, rep_msg, param->rnr_retry_count);
2240 IBA_SET(CM_REP_LOCAL_CA_GUID, rep_msg,
2241 be64_to_cpu(cm_id_priv->id.device->node_guid));
2243 if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) {
2244 IBA_SET(CM_REP_INITIATOR_DEPTH, rep_msg,
2245 param->initiator_depth);
2246 IBA_SET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg,
2247 param->flow_control);
2248 IBA_SET(CM_REP_SRQ, rep_msg, param->srq);
2249 IBA_SET(CM_REP_LOCAL_QPN, rep_msg, param->qp_num);
2251 IBA_SET(CM_REP_SRQ, rep_msg, 1);
2252 IBA_SET(CM_REP_LOCAL_EE_CONTEXT_NUMBER, rep_msg, param->qp_num);
2255 IBA_SET(CM_REP_VENDOR_ID_L, rep_msg, param->ece.vendor_id);
2256 IBA_SET(CM_REP_VENDOR_ID_M, rep_msg, param->ece.vendor_id >> 8);
2257 IBA_SET(CM_REP_VENDOR_ID_H, rep_msg, param->ece.vendor_id >> 16);
2259 if (param->private_data && param->private_data_len)
2260 IBA_SET_MEM(CM_REP_PRIVATE_DATA, rep_msg, param->private_data,
2261 param->private_data_len);
2264 int ib_send_cm_rep(struct ib_cm_id *cm_id,
2265 struct ib_cm_rep_param *param)
2267 struct cm_id_private *cm_id_priv;
2268 struct ib_mad_send_buf *msg;
2269 struct cm_rep_msg *rep_msg;
2270 unsigned long flags;
2273 if (param->private_data &&
2274 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
2277 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2278 spin_lock_irqsave(&cm_id_priv->lock, flags);
2279 if (cm_id->state != IB_CM_REQ_RCVD &&
2280 cm_id->state != IB_CM_MRA_REQ_SENT) {
2281 trace_icm_send_rep_err(cm_id_priv->id.local_id, cm_id->state);
2286 ret = cm_alloc_msg(cm_id_priv, &msg);
2290 rep_msg = (struct cm_rep_msg *) msg->mad;
2291 cm_format_rep(rep_msg, cm_id_priv, param);
2292 msg->timeout_ms = cm_id_priv->timeout_ms;
2293 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
2295 trace_icm_send_rep(cm_id);
2296 ret = ib_post_send_mad(msg, NULL);
2298 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2303 cm_id->state = IB_CM_REP_SENT;
2304 cm_id_priv->msg = msg;
2305 cm_id_priv->initiator_depth = param->initiator_depth;
2306 cm_id_priv->responder_resources = param->responder_resources;
2307 cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg));
2308 WARN_ONCE(param->qp_num & 0xFF000000,
2309 "IBTA declares QPN to be 24 bits, but it is 0x%X\n",
2311 cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF);
2313 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2316 EXPORT_SYMBOL(ib_send_cm_rep);
2318 static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
2319 struct cm_id_private *cm_id_priv,
2320 const void *private_data,
2321 u8 private_data_len)
2323 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
2324 IBA_SET(CM_RTU_LOCAL_COMM_ID, rtu_msg,
2325 be32_to_cpu(cm_id_priv->id.local_id));
2326 IBA_SET(CM_RTU_REMOTE_COMM_ID, rtu_msg,
2327 be32_to_cpu(cm_id_priv->id.remote_id));
2329 if (private_data && private_data_len)
2330 IBA_SET_MEM(CM_RTU_PRIVATE_DATA, rtu_msg, private_data,
2334 int ib_send_cm_rtu(struct ib_cm_id *cm_id,
2335 const void *private_data,
2336 u8 private_data_len)
2338 struct cm_id_private *cm_id_priv;
2339 struct ib_mad_send_buf *msg;
2340 unsigned long flags;
2344 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
2347 data = cm_copy_private_data(private_data, private_data_len);
2349 return PTR_ERR(data);
2351 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2352 spin_lock_irqsave(&cm_id_priv->lock, flags);
2353 if (cm_id->state != IB_CM_REP_RCVD &&
2354 cm_id->state != IB_CM_MRA_REP_SENT) {
2355 trace_icm_send_cm_rtu_err(cm_id);
2360 ret = cm_alloc_msg(cm_id_priv, &msg);
2364 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
2365 private_data, private_data_len);
2367 trace_icm_send_rtu(cm_id);
2368 ret = ib_post_send_mad(msg, NULL);
2370 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2376 cm_id->state = IB_CM_ESTABLISHED;
2377 cm_set_private_data(cm_id_priv, data, private_data_len);
2378 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2381 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2385 EXPORT_SYMBOL(ib_send_cm_rtu);
2387 static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type)
2389 struct cm_rep_msg *rep_msg;
2390 struct ib_cm_rep_event_param *param;
2392 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
2393 param = &work->cm_event.param.rep_rcvd;
2394 param->remote_ca_guid =
2395 cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg));
2396 param->remote_qkey = IBA_GET(CM_REP_LOCAL_Q_KEY, rep_msg);
2397 param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type));
2398 param->starting_psn = IBA_GET(CM_REP_STARTING_PSN, rep_msg);
2399 param->responder_resources = IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg);
2400 param->initiator_depth = IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg);
2401 param->target_ack_delay = IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg);
2402 param->failover_accepted = IBA_GET(CM_REP_FAILOVER_ACCEPTED, rep_msg);
2403 param->flow_control = IBA_GET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg);
2404 param->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg);
2405 param->srq = IBA_GET(CM_REP_SRQ, rep_msg);
2406 param->ece.vendor_id = IBA_GET(CM_REP_VENDOR_ID_H, rep_msg) << 16;
2407 param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_M, rep_msg) << 8;
2408 param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_L, rep_msg);
2409 param->ece.attr_mod = be32_to_cpu(rep_msg->hdr.attr_mod);
2411 work->cm_event.private_data =
2412 IBA_GET_MEM_PTR(CM_REP_PRIVATE_DATA, rep_msg);
2415 static void cm_dup_rep_handler(struct cm_work *work)
2417 struct cm_id_private *cm_id_priv;
2418 struct cm_rep_msg *rep_msg;
2419 struct ib_mad_send_buf *msg = NULL;
2422 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
2423 cm_id_priv = cm_acquire_id(
2424 cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)),
2425 cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg)));
2429 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2430 counter[CM_REP_COUNTER]);
2431 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
2435 spin_lock_irq(&cm_id_priv->lock);
2436 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
2437 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
2438 cm_id_priv->private_data,
2439 cm_id_priv->private_data_len);
2440 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
2441 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
2442 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
2443 cm_id_priv->private_data,
2444 cm_id_priv->private_data_len);
2447 spin_unlock_irq(&cm_id_priv->lock);
2449 trace_icm_send_dup_rep(&cm_id_priv->id);
2450 ret = ib_post_send_mad(msg, NULL);
2455 unlock: spin_unlock_irq(&cm_id_priv->lock);
2456 free: cm_free_msg(msg);
2457 deref: cm_deref_id(cm_id_priv);
2460 static int cm_rep_handler(struct cm_work *work)
2462 struct cm_id_private *cm_id_priv;
2463 struct cm_rep_msg *rep_msg;
2465 struct cm_id_private *cur_cm_id_priv;
2466 struct cm_timewait_info *timewait_info;
2468 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
2469 cm_id_priv = cm_acquire_id(
2470 cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)), 0);
2472 cm_dup_rep_handler(work);
2473 trace_icm_remote_no_priv_err(
2474 IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
2478 cm_format_rep_event(work, cm_id_priv->qp_type);
2480 spin_lock_irq(&cm_id_priv->lock);
2481 switch (cm_id_priv->id.state) {
2482 case IB_CM_REQ_SENT:
2483 case IB_CM_MRA_REQ_RCVD:
2487 trace_icm_rep_unknown_err(
2488 IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg),
2489 IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg),
2490 cm_id_priv->id.state);
2491 spin_unlock_irq(&cm_id_priv->lock);
2495 cm_id_priv->timewait_info->work.remote_id =
2496 cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg));
2497 cm_id_priv->timewait_info->remote_ca_guid =
2498 cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg));
2499 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
2501 spin_lock(&cm.lock);
2502 /* Check for duplicate REP. */
2503 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
2504 spin_unlock(&cm.lock);
2505 spin_unlock_irq(&cm_id_priv->lock);
2507 trace_icm_insert_failed_err(
2508 IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
2511 /* Check for a stale connection. */
2512 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
2513 if (timewait_info) {
2514 cm_remove_remote(cm_id_priv);
2515 cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
2516 timewait_info->work.remote_id);
2518 spin_unlock(&cm.lock);
2519 spin_unlock_irq(&cm_id_priv->lock);
2520 cm_issue_rej(work->port, work->mad_recv_wc,
2521 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
2524 trace_icm_staleconn_err(
2525 IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg),
2526 IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
2528 if (cur_cm_id_priv) {
2529 ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0);
2530 cm_deref_id(cur_cm_id_priv);
2535 spin_unlock(&cm.lock);
2537 cm_id_priv->id.state = IB_CM_REP_RCVD;
2538 cm_id_priv->id.remote_id =
2539 cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg));
2540 cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
2541 cm_id_priv->initiator_depth =
2542 IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg);
2543 cm_id_priv->responder_resources =
2544 IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg);
2545 cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg));
2546 cm_id_priv->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg);
2547 cm_id_priv->target_ack_delay =
2548 IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg);
2549 cm_id_priv->av.timeout =
2550 cm_ack_timeout(cm_id_priv->target_ack_delay,
2551 cm_id_priv->av.timeout - 1);
2552 cm_id_priv->alt_av.timeout =
2553 cm_ack_timeout(cm_id_priv->target_ack_delay,
2554 cm_id_priv->alt_av.timeout - 1);
2556 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2557 cm_queue_work_unlock(cm_id_priv, work);
2561 cm_deref_id(cm_id_priv);
2565 static int cm_establish_handler(struct cm_work *work)
2567 struct cm_id_private *cm_id_priv;
2569 /* See comment in cm_establish about lookup. */
2570 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
2574 spin_lock_irq(&cm_id_priv->lock);
2575 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
2576 spin_unlock_irq(&cm_id_priv->lock);
2580 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2581 cm_queue_work_unlock(cm_id_priv, work);
2584 cm_deref_id(cm_id_priv);
2588 static int cm_rtu_handler(struct cm_work *work)
2590 struct cm_id_private *cm_id_priv;
2591 struct cm_rtu_msg *rtu_msg;
2593 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
2594 cm_id_priv = cm_acquire_id(
2595 cpu_to_be32(IBA_GET(CM_RTU_REMOTE_COMM_ID, rtu_msg)),
2596 cpu_to_be32(IBA_GET(CM_RTU_LOCAL_COMM_ID, rtu_msg)));
2600 work->cm_event.private_data =
2601 IBA_GET_MEM_PTR(CM_RTU_PRIVATE_DATA, rtu_msg);
2603 spin_lock_irq(&cm_id_priv->lock);
2604 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
2605 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
2606 spin_unlock_irq(&cm_id_priv->lock);
2607 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2608 counter[CM_RTU_COUNTER]);
2611 cm_id_priv->id.state = IB_CM_ESTABLISHED;
2613 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2614 cm_queue_work_unlock(cm_id_priv, work);
2617 cm_deref_id(cm_id_priv);
2621 static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
2622 struct cm_id_private *cm_id_priv,
2623 const void *private_data,
2624 u8 private_data_len)
2626 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
2627 cm_form_tid(cm_id_priv));
2628 IBA_SET(CM_DREQ_LOCAL_COMM_ID, dreq_msg,
2629 be32_to_cpu(cm_id_priv->id.local_id));
2630 IBA_SET(CM_DREQ_REMOTE_COMM_ID, dreq_msg,
2631 be32_to_cpu(cm_id_priv->id.remote_id));
2632 IBA_SET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg,
2633 be32_to_cpu(cm_id_priv->remote_qpn));
2635 if (private_data && private_data_len)
2636 IBA_SET_MEM(CM_DREQ_PRIVATE_DATA, dreq_msg, private_data,
2640 static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv,
2641 const void *private_data, u8 private_data_len)
2643 struct ib_mad_send_buf *msg;
2646 lockdep_assert_held(&cm_id_priv->lock);
2648 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
2651 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
2652 trace_icm_dreq_skipped(&cm_id_priv->id);
2656 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
2657 cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
2658 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2660 ret = cm_alloc_msg(cm_id_priv, &msg);
2662 cm_enter_timewait(cm_id_priv);
2666 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
2667 private_data, private_data_len);
2668 msg->timeout_ms = cm_id_priv->timeout_ms;
2669 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
2671 trace_icm_send_dreq(&cm_id_priv->id);
2672 ret = ib_post_send_mad(msg, NULL);
2674 cm_enter_timewait(cm_id_priv);
2679 cm_id_priv->id.state = IB_CM_DREQ_SENT;
2680 cm_id_priv->msg = msg;
2684 int ib_send_cm_dreq(struct ib_cm_id *cm_id, const void *private_data,
2685 u8 private_data_len)
2687 struct cm_id_private *cm_id_priv =
2688 container_of(cm_id, struct cm_id_private, id);
2689 unsigned long flags;
2692 spin_lock_irqsave(&cm_id_priv->lock, flags);
2693 ret = cm_send_dreq_locked(cm_id_priv, private_data, private_data_len);
2694 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2697 EXPORT_SYMBOL(ib_send_cm_dreq);
2699 static void cm_format_drep(struct cm_drep_msg *drep_msg,
2700 struct cm_id_private *cm_id_priv,
2701 const void *private_data,
2702 u8 private_data_len)
2704 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
2705 IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg,
2706 be32_to_cpu(cm_id_priv->id.local_id));
2707 IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg,
2708 be32_to_cpu(cm_id_priv->id.remote_id));
2710 if (private_data && private_data_len)
2711 IBA_SET_MEM(CM_DREP_PRIVATE_DATA, drep_msg, private_data,
2715 static int cm_send_drep_locked(struct cm_id_private *cm_id_priv,
2716 void *private_data, u8 private_data_len)
2718 struct ib_mad_send_buf *msg;
2721 lockdep_assert_held(&cm_id_priv->lock);
2723 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
2726 if (cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
2727 trace_icm_send_drep_err(&cm_id_priv->id);
2728 kfree(private_data);
2732 cm_set_private_data(cm_id_priv, private_data, private_data_len);
2733 cm_enter_timewait(cm_id_priv);
2735 ret = cm_alloc_msg(cm_id_priv, &msg);
2739 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2740 private_data, private_data_len);
2742 trace_icm_send_drep(&cm_id_priv->id);
2743 ret = ib_post_send_mad(msg, NULL);
2751 int ib_send_cm_drep(struct ib_cm_id *cm_id, const void *private_data,
2752 u8 private_data_len)
2754 struct cm_id_private *cm_id_priv =
2755 container_of(cm_id, struct cm_id_private, id);
2756 unsigned long flags;
2760 data = cm_copy_private_data(private_data, private_data_len);
2762 return PTR_ERR(data);
2764 spin_lock_irqsave(&cm_id_priv->lock, flags);
2765 ret = cm_send_drep_locked(cm_id_priv, data, private_data_len);
2766 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2769 EXPORT_SYMBOL(ib_send_cm_drep);
2771 static int cm_issue_drep(struct cm_port *port,
2772 struct ib_mad_recv_wc *mad_recv_wc)
2774 struct ib_mad_send_buf *msg = NULL;
2775 struct cm_dreq_msg *dreq_msg;
2776 struct cm_drep_msg *drep_msg;
2779 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
2783 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
2784 drep_msg = (struct cm_drep_msg *) msg->mad;
2786 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
2787 IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg,
2788 IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg));
2789 IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg,
2790 IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
2792 trace_icm_issue_drep(
2793 IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg),
2794 IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
2795 ret = ib_post_send_mad(msg, NULL);
2802 static int cm_dreq_handler(struct cm_work *work)
2804 struct cm_id_private *cm_id_priv;
2805 struct cm_dreq_msg *dreq_msg;
2806 struct ib_mad_send_buf *msg = NULL;
2808 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
2809 cm_id_priv = cm_acquire_id(
2810 cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)),
2811 cpu_to_be32(IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg)));
2813 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2814 counter[CM_DREQ_COUNTER]);
2815 cm_issue_drep(work->port, work->mad_recv_wc);
2816 trace_icm_no_priv_err(
2817 IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg),
2818 IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
2822 work->cm_event.private_data =
2823 IBA_GET_MEM_PTR(CM_DREQ_PRIVATE_DATA, dreq_msg);
2825 spin_lock_irq(&cm_id_priv->lock);
2826 if (cm_id_priv->local_qpn !=
2827 cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg)))
2830 switch (cm_id_priv->id.state) {
2831 case IB_CM_REP_SENT:
2832 case IB_CM_DREQ_SENT:
2833 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2835 case IB_CM_ESTABLISHED:
2836 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
2837 cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
2838 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2840 case IB_CM_MRA_REP_RCVD:
2842 case IB_CM_TIMEWAIT:
2843 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2844 counter[CM_DREQ_COUNTER]);
2845 msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc);
2849 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2850 cm_id_priv->private_data,
2851 cm_id_priv->private_data_len);
2852 spin_unlock_irq(&cm_id_priv->lock);
2854 if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) ||
2855 ib_post_send_mad(msg, NULL))
2858 case IB_CM_DREQ_RCVD:
2859 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
2860 counter[CM_DREQ_COUNTER]);
2863 trace_icm_dreq_unknown_err(&cm_id_priv->id);
2866 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
2867 cm_id_priv->tid = dreq_msg->hdr.tid;
2868 cm_queue_work_unlock(cm_id_priv, work);
2871 unlock: spin_unlock_irq(&cm_id_priv->lock);
2872 deref: cm_deref_id(cm_id_priv);
2876 static int cm_drep_handler(struct cm_work *work)
2878 struct cm_id_private *cm_id_priv;
2879 struct cm_drep_msg *drep_msg;
2881 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
2882 cm_id_priv = cm_acquire_id(
2883 cpu_to_be32(IBA_GET(CM_DREP_REMOTE_COMM_ID, drep_msg)),
2884 cpu_to_be32(IBA_GET(CM_DREP_LOCAL_COMM_ID, drep_msg)));
2888 work->cm_event.private_data =
2889 IBA_GET_MEM_PTR(CM_DREP_PRIVATE_DATA, drep_msg);
2891 spin_lock_irq(&cm_id_priv->lock);
2892 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2893 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
2894 spin_unlock_irq(&cm_id_priv->lock);
2897 cm_enter_timewait(cm_id_priv);
2899 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
2900 cm_queue_work_unlock(cm_id_priv, work);
2903 cm_deref_id(cm_id_priv);
2907 static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
2908 enum ib_cm_rej_reason reason, void *ari,
2909 u8 ari_length, const void *private_data,
2910 u8 private_data_len)
2912 enum ib_cm_state state = cm_id_priv->id.state;
2913 struct ib_mad_send_buf *msg;
2916 lockdep_assert_held(&cm_id_priv->lock);
2918 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2919 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2923 case IB_CM_REQ_SENT:
2924 case IB_CM_MRA_REQ_RCVD:
2925 case IB_CM_REQ_RCVD:
2926 case IB_CM_MRA_REQ_SENT:
2927 case IB_CM_REP_RCVD:
2928 case IB_CM_MRA_REP_SENT:
2929 cm_reset_to_idle(cm_id_priv);
2930 ret = cm_alloc_msg(cm_id_priv, &msg);
2933 cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason,
2934 ari, ari_length, private_data, private_data_len,
2937 case IB_CM_REP_SENT:
2938 case IB_CM_MRA_REP_RCVD:
2939 cm_enter_timewait(cm_id_priv);
2940 ret = cm_alloc_msg(cm_id_priv, &msg);
2943 cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason,
2944 ari, ari_length, private_data, private_data_len,
2948 trace_icm_send_unknown_rej_err(&cm_id_priv->id);
2952 trace_icm_send_rej(&cm_id_priv->id, reason);
2953 ret = ib_post_send_mad(msg, NULL);
2962 int ib_send_cm_rej(struct ib_cm_id *cm_id, enum ib_cm_rej_reason reason,
2963 void *ari, u8 ari_length, const void *private_data,
2964 u8 private_data_len)
2966 struct cm_id_private *cm_id_priv =
2967 container_of(cm_id, struct cm_id_private, id);
2968 unsigned long flags;
2971 spin_lock_irqsave(&cm_id_priv->lock, flags);
2972 ret = cm_send_rej_locked(cm_id_priv, reason, ari, ari_length,
2973 private_data, private_data_len);
2974 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2977 EXPORT_SYMBOL(ib_send_cm_rej);
2979 static void cm_format_rej_event(struct cm_work *work)
2981 struct cm_rej_msg *rej_msg;
2982 struct ib_cm_rej_event_param *param;
2984 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
2985 param = &work->cm_event.param.rej_rcvd;
2986 param->ari = IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg);
2987 param->ari_length = IBA_GET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg);
2988 param->reason = IBA_GET(CM_REJ_REASON, rej_msg);
2989 work->cm_event.private_data =
2990 IBA_GET_MEM_PTR(CM_REJ_PRIVATE_DATA, rej_msg);
2993 static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
2995 struct cm_id_private *cm_id_priv;
2998 remote_id = cpu_to_be32(IBA_GET(CM_REJ_LOCAL_COMM_ID, rej_msg));
3000 if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_TIMEOUT) {
3001 cm_id_priv = cm_find_remote_id(
3002 *((__be64 *)IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg)),
3004 } else if (IBA_GET(CM_REJ_MESSAGE_REJECTED, rej_msg) ==
3005 CM_MSG_RESPONSE_REQ)
3006 cm_id_priv = cm_acquire_id(
3007 cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)),
3010 cm_id_priv = cm_acquire_id(
3011 cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)),
3017 static int cm_rej_handler(struct cm_work *work)
3019 struct cm_id_private *cm_id_priv;
3020 struct cm_rej_msg *rej_msg;
3022 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
3023 cm_id_priv = cm_acquire_rejected_id(rej_msg);
3027 cm_format_rej_event(work);
3029 spin_lock_irq(&cm_id_priv->lock);
3030 switch (cm_id_priv->id.state) {
3031 case IB_CM_REQ_SENT:
3032 case IB_CM_MRA_REQ_RCVD:
3033 case IB_CM_REP_SENT:
3034 case IB_CM_MRA_REP_RCVD:
3035 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
3037 case IB_CM_REQ_RCVD:
3038 case IB_CM_MRA_REQ_SENT:
3039 if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_STALE_CONN)
3040 cm_enter_timewait(cm_id_priv);
3042 cm_reset_to_idle(cm_id_priv);
3044 case IB_CM_DREQ_SENT:
3045 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
3047 case IB_CM_REP_RCVD:
3048 case IB_CM_MRA_REP_SENT:
3049 cm_enter_timewait(cm_id_priv);
3051 case IB_CM_ESTABLISHED:
3052 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT ||
3053 cm_id_priv->id.lap_state == IB_CM_LAP_SENT) {
3054 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT)
3055 ib_cancel_mad(cm_id_priv->av.port->mad_agent,
3057 cm_enter_timewait(cm_id_priv);
3062 trace_icm_rej_unknown_err(&cm_id_priv->id);
3063 spin_unlock_irq(&cm_id_priv->lock);
3067 cm_queue_work_unlock(cm_id_priv, work);
3070 cm_deref_id(cm_id_priv);
3074 int ib_send_cm_mra(struct ib_cm_id *cm_id,
3076 const void *private_data,
3077 u8 private_data_len)
3079 struct cm_id_private *cm_id_priv;
3080 struct ib_mad_send_buf *msg;
3081 enum ib_cm_state cm_state;
3082 enum ib_cm_lap_state lap_state;
3083 enum cm_msg_response msg_response;
3085 unsigned long flags;
3088 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
3091 data = cm_copy_private_data(private_data, private_data_len);
3093 return PTR_ERR(data);
3095 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3097 spin_lock_irqsave(&cm_id_priv->lock, flags);
3098 switch(cm_id_priv->id.state) {
3099 case IB_CM_REQ_RCVD:
3100 cm_state = IB_CM_MRA_REQ_SENT;
3101 lap_state = cm_id->lap_state;
3102 msg_response = CM_MSG_RESPONSE_REQ;
3104 case IB_CM_REP_RCVD:
3105 cm_state = IB_CM_MRA_REP_SENT;
3106 lap_state = cm_id->lap_state;
3107 msg_response = CM_MSG_RESPONSE_REP;
3109 case IB_CM_ESTABLISHED:
3110 if (cm_id->lap_state == IB_CM_LAP_RCVD) {
3111 cm_state = cm_id->state;
3112 lap_state = IB_CM_MRA_LAP_SENT;
3113 msg_response = CM_MSG_RESPONSE_OTHER;
3118 trace_icm_send_mra_unknown_err(&cm_id_priv->id);
3123 if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) {
3124 ret = cm_alloc_msg(cm_id_priv, &msg);
3128 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
3129 msg_response, service_timeout,
3130 private_data, private_data_len);
3131 trace_icm_send_mra(cm_id);
3132 ret = ib_post_send_mad(msg, NULL);
3137 cm_id->state = cm_state;
3138 cm_id->lap_state = lap_state;
3139 cm_id_priv->service_timeout = service_timeout;
3140 cm_set_private_data(cm_id_priv, data, private_data_len);
3141 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3144 error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3148 error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3153 EXPORT_SYMBOL(ib_send_cm_mra);
3155 static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
3157 switch (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg)) {
3158 case CM_MSG_RESPONSE_REQ:
3159 return cm_acquire_id(
3160 cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)),
3162 case CM_MSG_RESPONSE_REP:
3163 case CM_MSG_RESPONSE_OTHER:
3164 return cm_acquire_id(
3165 cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)),
3166 cpu_to_be32(IBA_GET(CM_MRA_LOCAL_COMM_ID, mra_msg)));
3172 static int cm_mra_handler(struct cm_work *work)
3174 struct cm_id_private *cm_id_priv;
3175 struct cm_mra_msg *mra_msg;
3178 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
3179 cm_id_priv = cm_acquire_mraed_id(mra_msg);
3183 work->cm_event.private_data =
3184 IBA_GET_MEM_PTR(CM_MRA_PRIVATE_DATA, mra_msg);
3185 work->cm_event.param.mra_rcvd.service_timeout =
3186 IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg);
3187 timeout = cm_convert_to_ms(IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg)) +
3188 cm_convert_to_ms(cm_id_priv->av.timeout);
3190 spin_lock_irq(&cm_id_priv->lock);
3191 switch (cm_id_priv->id.state) {
3192 case IB_CM_REQ_SENT:
3193 if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
3194 CM_MSG_RESPONSE_REQ ||
3195 ib_modify_mad(cm_id_priv->av.port->mad_agent,
3196 cm_id_priv->msg, timeout))
3198 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
3200 case IB_CM_REP_SENT:
3201 if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
3202 CM_MSG_RESPONSE_REP ||
3203 ib_modify_mad(cm_id_priv->av.port->mad_agent,
3204 cm_id_priv->msg, timeout))
3206 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
3208 case IB_CM_ESTABLISHED:
3209 if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
3210 CM_MSG_RESPONSE_OTHER ||
3211 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
3212 ib_modify_mad(cm_id_priv->av.port->mad_agent,
3213 cm_id_priv->msg, timeout)) {
3214 if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
3215 atomic_long_inc(&work->port->
3216 counter_group[CM_RECV_DUPLICATES].
3217 counter[CM_MRA_COUNTER]);
3220 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
3222 case IB_CM_MRA_REQ_RCVD:
3223 case IB_CM_MRA_REP_RCVD:
3224 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
3225 counter[CM_MRA_COUNTER]);
3228 trace_icm_mra_unknown_err(&cm_id_priv->id);
3232 cm_id_priv->msg->context[1] = (void *) (unsigned long)
3233 cm_id_priv->id.state;
3234 cm_queue_work_unlock(cm_id_priv, work);
3237 spin_unlock_irq(&cm_id_priv->lock);
3238 cm_deref_id(cm_id_priv);
3242 static void cm_format_path_lid_from_lap(struct cm_lap_msg *lap_msg,
3243 struct sa_path_rec *path)
3247 if (path->rec_type != SA_PATH_REC_TYPE_OPA) {
3248 sa_path_set_dlid(path, IBA_GET(CM_LAP_ALTERNATE_LOCAL_PORT_LID,
3250 sa_path_set_slid(path, IBA_GET(CM_LAP_ALTERNATE_REMOTE_PORT_LID,
3253 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
3254 CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg));
3255 sa_path_set_dlid(path, lid);
3257 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
3258 CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg));
3259 sa_path_set_slid(path, lid);
3263 static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
3264 struct sa_path_rec *path,
3265 struct cm_lap_msg *lap_msg)
3267 path->dgid = *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg);
3269 *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg);
3271 cpu_to_be32(IBA_GET(CM_LAP_ALTERNATE_FLOW_LABEL, lap_msg));
3272 path->hop_limit = IBA_GET(CM_LAP_ALTERNATE_HOP_LIMIT, lap_msg);
3273 path->traffic_class = IBA_GET(CM_LAP_ALTERNATE_TRAFFIC_CLASS, lap_msg);
3274 path->reversible = 1;
3275 path->pkey = cm_id_priv->pkey;
3276 path->sl = IBA_GET(CM_LAP_ALTERNATE_SL, lap_msg);
3277 path->mtu_selector = IB_SA_EQ;
3278 path->mtu = cm_id_priv->path_mtu;
3279 path->rate_selector = IB_SA_EQ;
3280 path->rate = IBA_GET(CM_LAP_ALTERNATE_PACKET_RATE, lap_msg);
3281 path->packet_life_time_selector = IB_SA_EQ;
3282 path->packet_life_time =
3283 IBA_GET(CM_LAP_ALTERNATE_LOCAL_ACK_TIMEOUT, lap_msg);
3284 path->packet_life_time -= (path->packet_life_time > 0);
3285 cm_format_path_lid_from_lap(lap_msg, path);
3288 static int cm_lap_handler(struct cm_work *work)
3290 struct cm_id_private *cm_id_priv;
3291 struct cm_lap_msg *lap_msg;
3292 struct ib_cm_lap_event_param *param;
3293 struct ib_mad_send_buf *msg = NULL;
3296 /* Currently Alternate path messages are not supported for
3299 if (rdma_protocol_roce(work->port->cm_dev->ib_device,
3300 work->port->port_num))
3303 /* todo: verify LAP request and send reject APR if invalid. */
3304 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
3305 cm_id_priv = cm_acquire_id(
3306 cpu_to_be32(IBA_GET(CM_LAP_REMOTE_COMM_ID, lap_msg)),
3307 cpu_to_be32(IBA_GET(CM_LAP_LOCAL_COMM_ID, lap_msg)));
3311 param = &work->cm_event.param.lap_rcvd;
3312 memset(&work->path[0], 0, sizeof(work->path[1]));
3313 cm_path_set_rec_type(work->port->cm_dev->ib_device,
3314 work->port->port_num, &work->path[0],
3315 IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID,
3317 param->alternate_path = &work->path[0];
3318 cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
3319 work->cm_event.private_data =
3320 IBA_GET_MEM_PTR(CM_LAP_PRIVATE_DATA, lap_msg);
3322 spin_lock_irq(&cm_id_priv->lock);
3323 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
3326 switch (cm_id_priv->id.lap_state) {
3327 case IB_CM_LAP_UNINIT:
3328 case IB_CM_LAP_IDLE:
3330 case IB_CM_MRA_LAP_SENT:
3331 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
3332 counter[CM_LAP_COUNTER]);
3333 msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc);
3337 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
3338 CM_MSG_RESPONSE_OTHER,
3339 cm_id_priv->service_timeout,
3340 cm_id_priv->private_data,
3341 cm_id_priv->private_data_len);
3342 spin_unlock_irq(&cm_id_priv->lock);
3344 if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) ||
3345 ib_post_send_mad(msg, NULL))
3348 case IB_CM_LAP_RCVD:
3349 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
3350 counter[CM_LAP_COUNTER]);
3356 ret = cm_init_av_for_lap(work->port, work->mad_recv_wc->wc,
3357 work->mad_recv_wc->recv_buf.grh,
3362 ret = cm_init_av_by_path(param->alternate_path, NULL,
3363 &cm_id_priv->alt_av, cm_id_priv);
3367 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
3368 cm_id_priv->tid = lap_msg->hdr.tid;
3369 cm_queue_work_unlock(cm_id_priv, work);
3372 unlock: spin_unlock_irq(&cm_id_priv->lock);
3373 deref: cm_deref_id(cm_id_priv);
3377 static int cm_apr_handler(struct cm_work *work)
3379 struct cm_id_private *cm_id_priv;
3380 struct cm_apr_msg *apr_msg;
3382 /* Currently Alternate path messages are not supported for
3385 if (rdma_protocol_roce(work->port->cm_dev->ib_device,
3386 work->port->port_num))
3389 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
3390 cm_id_priv = cm_acquire_id(
3391 cpu_to_be32(IBA_GET(CM_APR_REMOTE_COMM_ID, apr_msg)),
3392 cpu_to_be32(IBA_GET(CM_APR_LOCAL_COMM_ID, apr_msg)));
3394 return -EINVAL; /* Unmatched reply. */
3396 work->cm_event.param.apr_rcvd.ap_status =
3397 IBA_GET(CM_APR_AR_STATUS, apr_msg);
3398 work->cm_event.param.apr_rcvd.apr_info =
3399 IBA_GET_MEM_PTR(CM_APR_ADDITIONAL_INFORMATION, apr_msg);
3400 work->cm_event.param.apr_rcvd.info_len =
3401 IBA_GET(CM_APR_ADDITIONAL_INFORMATION_LENGTH, apr_msg);
3402 work->cm_event.private_data =
3403 IBA_GET_MEM_PTR(CM_APR_PRIVATE_DATA, apr_msg);
3405 spin_lock_irq(&cm_id_priv->lock);
3406 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
3407 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
3408 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
3409 spin_unlock_irq(&cm_id_priv->lock);
3412 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
3413 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
3414 cm_id_priv->msg = NULL;
3415 cm_queue_work_unlock(cm_id_priv, work);
3418 cm_deref_id(cm_id_priv);
3422 static int cm_timewait_handler(struct cm_work *work)
3424 struct cm_timewait_info *timewait_info;
3425 struct cm_id_private *cm_id_priv;
3427 timewait_info = container_of(work, struct cm_timewait_info, work);
3428 spin_lock_irq(&cm.lock);
3429 list_del(&timewait_info->list);
3430 spin_unlock_irq(&cm.lock);
3432 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
3433 timewait_info->work.remote_id);
3437 spin_lock_irq(&cm_id_priv->lock);
3438 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
3439 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
3440 spin_unlock_irq(&cm_id_priv->lock);
3443 cm_id_priv->id.state = IB_CM_IDLE;
3444 cm_queue_work_unlock(cm_id_priv, work);
3447 cm_deref_id(cm_id_priv);
3451 static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
3452 struct cm_id_private *cm_id_priv,
3453 struct ib_cm_sidr_req_param *param)
3455 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
3456 cm_form_tid(cm_id_priv));
3457 IBA_SET(CM_SIDR_REQ_REQUESTID, sidr_req_msg,
3458 be32_to_cpu(cm_id_priv->id.local_id));
3459 IBA_SET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg,
3460 be16_to_cpu(param->path->pkey));
3461 IBA_SET(CM_SIDR_REQ_SERVICEID, sidr_req_msg,
3462 be64_to_cpu(param->service_id));
3464 if (param->private_data && param->private_data_len)
3465 IBA_SET_MEM(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg,
3466 param->private_data, param->private_data_len);
3469 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
3470 struct ib_cm_sidr_req_param *param)
3472 struct cm_id_private *cm_id_priv;
3473 struct ib_mad_send_buf *msg;
3474 unsigned long flags;
3477 if (!param->path || (param->private_data &&
3478 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
3481 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3482 ret = cm_init_av_by_path(param->path, param->sgid_attr,
3488 cm_id->service_id = param->service_id;
3489 cm_id->service_mask = ~cpu_to_be64(0);
3490 cm_id_priv->timeout_ms = param->timeout_ms;
3491 cm_id_priv->max_cm_retries = param->max_cm_retries;
3492 ret = cm_alloc_msg(cm_id_priv, &msg);
3496 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
3498 msg->timeout_ms = cm_id_priv->timeout_ms;
3499 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
3501 spin_lock_irqsave(&cm_id_priv->lock, flags);
3502 if (cm_id->state == IB_CM_IDLE) {
3503 trace_icm_send_sidr_req(&cm_id_priv->id);
3504 ret = ib_post_send_mad(msg, NULL);
3510 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3514 cm_id->state = IB_CM_SIDR_REQ_SENT;
3515 cm_id_priv->msg = msg;
3516 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3520 EXPORT_SYMBOL(ib_send_cm_sidr_req);
3522 static void cm_format_sidr_req_event(struct cm_work *work,
3523 const struct cm_id_private *rx_cm_id,
3524 struct ib_cm_id *listen_id)
3526 struct cm_sidr_req_msg *sidr_req_msg;
3527 struct ib_cm_sidr_req_event_param *param;
3529 sidr_req_msg = (struct cm_sidr_req_msg *)
3530 work->mad_recv_wc->recv_buf.mad;
3531 param = &work->cm_event.param.sidr_req_rcvd;
3532 param->pkey = IBA_GET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg);
3533 param->listen_id = listen_id;
3535 cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg));
3536 param->bth_pkey = cm_get_bth_pkey(work);
3537 param->port = work->port->port_num;
3538 param->sgid_attr = rx_cm_id->av.ah_attr.grh.sgid_attr;
3539 work->cm_event.private_data =
3540 IBA_GET_MEM_PTR(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg);
3543 static int cm_sidr_req_handler(struct cm_work *work)
3545 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
3546 struct cm_sidr_req_msg *sidr_req_msg;
3551 cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL);
3552 if (IS_ERR(cm_id_priv))
3553 return PTR_ERR(cm_id_priv);
3555 /* Record SGID/SLID and request ID for lookup. */
3556 sidr_req_msg = (struct cm_sidr_req_msg *)
3557 work->mad_recv_wc->recv_buf.mad;
3559 cm_id_priv->id.remote_id =
3560 cpu_to_be32(IBA_GET(CM_SIDR_REQ_REQUESTID, sidr_req_msg));
3561 cm_id_priv->id.service_id =
3562 cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg));
3563 cm_id_priv->id.service_mask = ~cpu_to_be64(0);
3564 cm_id_priv->tid = sidr_req_msg->hdr.tid;
3566 wc = work->mad_recv_wc->wc;
3567 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
3568 cm_id_priv->av.dgid.global.interface_id = 0;
3569 ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
3570 work->mad_recv_wc->recv_buf.grh,
3575 spin_lock_irq(&cm.lock);
3576 listen_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
3577 if (listen_cm_id_priv) {
3578 spin_unlock_irq(&cm.lock);
3579 atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
3580 counter[CM_SIDR_REQ_COUNTER]);
3581 goto out; /* Duplicate message. */
3583 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
3584 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
3585 cm_id_priv->id.service_id);
3586 if (!listen_cm_id_priv) {
3587 spin_unlock_irq(&cm.lock);
3588 ib_send_cm_sidr_rep(&cm_id_priv->id,
3589 &(struct ib_cm_sidr_rep_param){
3590 .status = IB_SIDR_UNSUPPORTED });
3591 goto out; /* No match. */
3593 spin_unlock_irq(&cm.lock);
3595 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
3596 cm_id_priv->id.context = listen_cm_id_priv->id.context;
3599 * A SIDR ID does not need to be in the xarray since it does not receive
3600 * mads, is not placed in the remote_id or remote_qpn rbtree, and does
3601 * not enter timewait.
3604 cm_format_sidr_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
3605 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
3608 * A pointer to the listen_cm_id is held in the event, so this deref
3609 * must be after the event is delivered above.
3611 cm_deref_id(listen_cm_id_priv);
3613 cm_destroy_id(&cm_id_priv->id, ret);
3616 ib_destroy_cm_id(&cm_id_priv->id);
3620 static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
3621 struct cm_id_private *cm_id_priv,
3622 struct ib_cm_sidr_rep_param *param)
3624 cm_format_mad_ece_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
3625 cm_id_priv->tid, param->ece.attr_mod);
3626 IBA_SET(CM_SIDR_REP_REQUESTID, sidr_rep_msg,
3627 be32_to_cpu(cm_id_priv->id.remote_id));
3628 IBA_SET(CM_SIDR_REP_STATUS, sidr_rep_msg, param->status);
3629 IBA_SET(CM_SIDR_REP_QPN, sidr_rep_msg, param->qp_num);
3630 IBA_SET(CM_SIDR_REP_SERVICEID, sidr_rep_msg,
3631 be64_to_cpu(cm_id_priv->id.service_id));
3632 IBA_SET(CM_SIDR_REP_Q_KEY, sidr_rep_msg, param->qkey);
3633 IBA_SET(CM_SIDR_REP_VENDOR_ID_L, sidr_rep_msg,
3634 param->ece.vendor_id & 0xFF);
3635 IBA_SET(CM_SIDR_REP_VENDOR_ID_H, sidr_rep_msg,
3636 (param->ece.vendor_id >> 8) & 0xFF);
3638 if (param->info && param->info_length)
3639 IBA_SET_MEM(CM_SIDR_REP_ADDITIONAL_INFORMATION, sidr_rep_msg,
3640 param->info, param->info_length);
3642 if (param->private_data && param->private_data_len)
3643 IBA_SET_MEM(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg,
3644 param->private_data, param->private_data_len);
3647 static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv,
3648 struct ib_cm_sidr_rep_param *param)
3650 struct ib_mad_send_buf *msg;
3653 lockdep_assert_held(&cm_id_priv->lock);
3655 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
3656 (param->private_data &&
3657 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
3660 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_RCVD)
3663 ret = cm_alloc_msg(cm_id_priv, &msg);
3667 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
3669 trace_icm_send_sidr_rep(&cm_id_priv->id);
3670 ret = ib_post_send_mad(msg, NULL);
3675 cm_id_priv->id.state = IB_CM_IDLE;
3676 spin_lock_irq(&cm.lock);
3677 if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) {
3678 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
3679 RB_CLEAR_NODE(&cm_id_priv->sidr_id_node);
3681 spin_unlock_irq(&cm.lock);
3685 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
3686 struct ib_cm_sidr_rep_param *param)
3688 struct cm_id_private *cm_id_priv =
3689 container_of(cm_id, struct cm_id_private, id);
3690 unsigned long flags;
3693 spin_lock_irqsave(&cm_id_priv->lock, flags);
3694 ret = cm_send_sidr_rep_locked(cm_id_priv, param);
3695 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3698 EXPORT_SYMBOL(ib_send_cm_sidr_rep);
3700 static void cm_format_sidr_rep_event(struct cm_work *work,
3701 const struct cm_id_private *cm_id_priv)
3703 struct cm_sidr_rep_msg *sidr_rep_msg;
3704 struct ib_cm_sidr_rep_event_param *param;
3706 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3707 work->mad_recv_wc->recv_buf.mad;
3708 param = &work->cm_event.param.sidr_rep_rcvd;
3709 param->status = IBA_GET(CM_SIDR_REP_STATUS, sidr_rep_msg);
3710 param->qkey = IBA_GET(CM_SIDR_REP_Q_KEY, sidr_rep_msg);
3711 param->qpn = IBA_GET(CM_SIDR_REP_QPN, sidr_rep_msg);
3712 param->info = IBA_GET_MEM_PTR(CM_SIDR_REP_ADDITIONAL_INFORMATION,
3714 param->info_len = IBA_GET(CM_SIDR_REP_ADDITIONAL_INFORMATION_LENGTH,
3716 param->sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr;
3717 work->cm_event.private_data =
3718 IBA_GET_MEM_PTR(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg);
3721 static int cm_sidr_rep_handler(struct cm_work *work)
3723 struct cm_sidr_rep_msg *sidr_rep_msg;
3724 struct cm_id_private *cm_id_priv;
3726 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3727 work->mad_recv_wc->recv_buf.mad;
3728 cm_id_priv = cm_acquire_id(
3729 cpu_to_be32(IBA_GET(CM_SIDR_REP_REQUESTID, sidr_rep_msg)), 0);
3731 return -EINVAL; /* Unmatched reply. */
3733 spin_lock_irq(&cm_id_priv->lock);
3734 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
3735 spin_unlock_irq(&cm_id_priv->lock);
3738 cm_id_priv->id.state = IB_CM_IDLE;
3739 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
3740 spin_unlock_irq(&cm_id_priv->lock);
3742 cm_format_sidr_rep_event(work, cm_id_priv);
3743 cm_process_work(cm_id_priv, work);
3746 cm_deref_id(cm_id_priv);
3750 static void cm_process_send_error(struct ib_mad_send_buf *msg,
3751 enum ib_wc_status wc_status)
3753 struct cm_id_private *cm_id_priv;
3754 struct ib_cm_event cm_event;
3755 enum ib_cm_state state;
3758 memset(&cm_event, 0, sizeof cm_event);
3759 cm_id_priv = msg->context[0];
3761 /* Discard old sends or ones without a response. */
3762 spin_lock_irq(&cm_id_priv->lock);
3763 state = (enum ib_cm_state) (unsigned long) msg->context[1];
3764 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
3767 trace_icm_mad_send_err(state, wc_status);
3769 case IB_CM_REQ_SENT:
3770 case IB_CM_MRA_REQ_RCVD:
3771 cm_reset_to_idle(cm_id_priv);
3772 cm_event.event = IB_CM_REQ_ERROR;
3774 case IB_CM_REP_SENT:
3775 case IB_CM_MRA_REP_RCVD:
3776 cm_reset_to_idle(cm_id_priv);
3777 cm_event.event = IB_CM_REP_ERROR;
3779 case IB_CM_DREQ_SENT:
3780 cm_enter_timewait(cm_id_priv);
3781 cm_event.event = IB_CM_DREQ_ERROR;
3783 case IB_CM_SIDR_REQ_SENT:
3784 cm_id_priv->id.state = IB_CM_IDLE;
3785 cm_event.event = IB_CM_SIDR_REQ_ERROR;
3790 spin_unlock_irq(&cm_id_priv->lock);
3791 cm_event.param.send_status = wc_status;
3793 /* No other events can occur on the cm_id at this point. */
3794 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
3797 ib_destroy_cm_id(&cm_id_priv->id);
3800 spin_unlock_irq(&cm_id_priv->lock);
3804 static void cm_send_handler(struct ib_mad_agent *mad_agent,
3805 struct ib_mad_send_wc *mad_send_wc)
3807 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
3808 struct cm_port *port;
3811 port = mad_agent->context;
3812 attr_index = be16_to_cpu(((struct ib_mad_hdr *)
3813 msg->mad)->attr_id) - CM_ATTR_ID_OFFSET;
3816 * If the send was in response to a received message (context[0] is not
3817 * set to a cm_id), and is not a REJ, then it is a send that was
3820 if (!msg->context[0] && (attr_index != CM_REJ_COUNTER))
3823 atomic_long_add(1 + msg->retries,
3824 &port->counter_group[CM_XMIT].counter[attr_index]);
3826 atomic_long_add(msg->retries,
3827 &port->counter_group[CM_XMIT_RETRIES].
3828 counter[attr_index]);
3830 switch (mad_send_wc->status) {
3832 case IB_WC_WR_FLUSH_ERR:
3836 if (msg->context[0] && msg->context[1])
3837 cm_process_send_error(msg, mad_send_wc->status);
3844 static void cm_work_handler(struct work_struct *_work)
3846 struct cm_work *work = container_of(_work, struct cm_work, work.work);
3849 switch (work->cm_event.event) {
3850 case IB_CM_REQ_RECEIVED:
3851 ret = cm_req_handler(work);
3853 case IB_CM_MRA_RECEIVED:
3854 ret = cm_mra_handler(work);
3856 case IB_CM_REJ_RECEIVED:
3857 ret = cm_rej_handler(work);
3859 case IB_CM_REP_RECEIVED:
3860 ret = cm_rep_handler(work);
3862 case IB_CM_RTU_RECEIVED:
3863 ret = cm_rtu_handler(work);
3865 case IB_CM_USER_ESTABLISHED:
3866 ret = cm_establish_handler(work);
3868 case IB_CM_DREQ_RECEIVED:
3869 ret = cm_dreq_handler(work);
3871 case IB_CM_DREP_RECEIVED:
3872 ret = cm_drep_handler(work);
3874 case IB_CM_SIDR_REQ_RECEIVED:
3875 ret = cm_sidr_req_handler(work);
3877 case IB_CM_SIDR_REP_RECEIVED:
3878 ret = cm_sidr_rep_handler(work);
3880 case IB_CM_LAP_RECEIVED:
3881 ret = cm_lap_handler(work);
3883 case IB_CM_APR_RECEIVED:
3884 ret = cm_apr_handler(work);
3886 case IB_CM_TIMEWAIT_EXIT:
3887 ret = cm_timewait_handler(work);
3890 trace_icm_handler_err(work->cm_event.event);
3898 static int cm_establish(struct ib_cm_id *cm_id)
3900 struct cm_id_private *cm_id_priv;
3901 struct cm_work *work;
3902 unsigned long flags;
3904 struct cm_device *cm_dev;
3906 cm_dev = ib_get_client_data(cm_id->device, &cm_client);
3910 work = kmalloc(sizeof *work, GFP_ATOMIC);
3914 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3915 spin_lock_irqsave(&cm_id_priv->lock, flags);
3916 switch (cm_id->state)
3918 case IB_CM_REP_SENT:
3919 case IB_CM_MRA_REP_RCVD:
3920 cm_id->state = IB_CM_ESTABLISHED;
3922 case IB_CM_ESTABLISHED:
3926 trace_icm_establish_err(cm_id);
3930 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3938 * The CM worker thread may try to destroy the cm_id before it
3939 * can execute this work item. To prevent potential deadlock,
3940 * we need to find the cm_id once we're in the context of the
3941 * worker thread, rather than holding a reference on it.
3943 INIT_DELAYED_WORK(&work->work, cm_work_handler);
3944 work->local_id = cm_id->local_id;
3945 work->remote_id = cm_id->remote_id;
3946 work->mad_recv_wc = NULL;
3947 work->cm_event.event = IB_CM_USER_ESTABLISHED;
3949 /* Check if the device started its remove_one */
3950 spin_lock_irqsave(&cm.lock, flags);
3951 if (!cm_dev->going_down) {
3952 queue_delayed_work(cm.wq, &work->work, 0);
3957 spin_unlock_irqrestore(&cm.lock, flags);
3963 static int cm_migrate(struct ib_cm_id *cm_id)
3965 struct cm_id_private *cm_id_priv;
3966 struct cm_av tmp_av;
3967 unsigned long flags;
3968 int tmp_send_port_not_ready;
3971 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3972 spin_lock_irqsave(&cm_id_priv->lock, flags);
3973 if (cm_id->state == IB_CM_ESTABLISHED &&
3974 (cm_id->lap_state == IB_CM_LAP_UNINIT ||
3975 cm_id->lap_state == IB_CM_LAP_IDLE)) {
3976 cm_id->lap_state = IB_CM_LAP_IDLE;
3977 /* Swap address vector */
3978 tmp_av = cm_id_priv->av;
3979 cm_id_priv->av = cm_id_priv->alt_av;
3980 cm_id_priv->alt_av = tmp_av;
3981 /* Swap port send ready state */
3982 tmp_send_port_not_ready = cm_id_priv->prim_send_port_not_ready;
3983 cm_id_priv->prim_send_port_not_ready = cm_id_priv->altr_send_port_not_ready;
3984 cm_id_priv->altr_send_port_not_ready = tmp_send_port_not_ready;
3987 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3992 int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
3997 case IB_EVENT_COMM_EST:
3998 ret = cm_establish(cm_id);
4000 case IB_EVENT_PATH_MIG:
4001 ret = cm_migrate(cm_id);
4008 EXPORT_SYMBOL(ib_cm_notify);
4010 static void cm_recv_handler(struct ib_mad_agent *mad_agent,
4011 struct ib_mad_send_buf *send_buf,
4012 struct ib_mad_recv_wc *mad_recv_wc)
4014 struct cm_port *port = mad_agent->context;
4015 struct cm_work *work;
4016 enum ib_cm_event_type event;
4017 bool alt_path = false;
4022 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
4023 case CM_REQ_ATTR_ID:
4024 alt_path = cm_req_has_alt_path((struct cm_req_msg *)
4025 mad_recv_wc->recv_buf.mad);
4026 paths = 1 + (alt_path != 0);
4027 event = IB_CM_REQ_RECEIVED;
4029 case CM_MRA_ATTR_ID:
4030 event = IB_CM_MRA_RECEIVED;
4032 case CM_REJ_ATTR_ID:
4033 event = IB_CM_REJ_RECEIVED;
4035 case CM_REP_ATTR_ID:
4036 event = IB_CM_REP_RECEIVED;
4038 case CM_RTU_ATTR_ID:
4039 event = IB_CM_RTU_RECEIVED;
4041 case CM_DREQ_ATTR_ID:
4042 event = IB_CM_DREQ_RECEIVED;
4044 case CM_DREP_ATTR_ID:
4045 event = IB_CM_DREP_RECEIVED;
4047 case CM_SIDR_REQ_ATTR_ID:
4048 event = IB_CM_SIDR_REQ_RECEIVED;
4050 case CM_SIDR_REP_ATTR_ID:
4051 event = IB_CM_SIDR_REP_RECEIVED;
4053 case CM_LAP_ATTR_ID:
4055 event = IB_CM_LAP_RECEIVED;
4057 case CM_APR_ATTR_ID:
4058 event = IB_CM_APR_RECEIVED;
4061 ib_free_recv_mad(mad_recv_wc);
4065 attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id);
4066 atomic_long_inc(&port->counter_group[CM_RECV].
4067 counter[attr_id - CM_ATTR_ID_OFFSET]);
4069 work = kmalloc(struct_size(work, path, paths), GFP_KERNEL);
4071 ib_free_recv_mad(mad_recv_wc);
4075 INIT_DELAYED_WORK(&work->work, cm_work_handler);
4076 work->cm_event.event = event;
4077 work->mad_recv_wc = mad_recv_wc;
4080 /* Check if the device started its remove_one */
4081 spin_lock_irq(&cm.lock);
4082 if (!port->cm_dev->going_down)
4083 queue_delayed_work(cm.wq, &work->work, 0);
4086 spin_unlock_irq(&cm.lock);
4090 ib_free_recv_mad(mad_recv_wc);
4094 static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
4095 struct ib_qp_attr *qp_attr,
4098 unsigned long flags;
4101 spin_lock_irqsave(&cm_id_priv->lock, flags);
4102 switch (cm_id_priv->id.state) {
4103 case IB_CM_REQ_SENT:
4104 case IB_CM_MRA_REQ_RCVD:
4105 case IB_CM_REQ_RCVD:
4106 case IB_CM_MRA_REQ_SENT:
4107 case IB_CM_REP_RCVD:
4108 case IB_CM_MRA_REP_SENT:
4109 case IB_CM_REP_SENT:
4110 case IB_CM_MRA_REP_RCVD:
4111 case IB_CM_ESTABLISHED:
4112 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
4113 IB_QP_PKEY_INDEX | IB_QP_PORT;
4114 qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
4115 if (cm_id_priv->responder_resources)
4116 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
4117 IB_ACCESS_REMOTE_ATOMIC;
4118 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
4119 qp_attr->port_num = cm_id_priv->av.port->port_num;
4123 trace_icm_qp_init_err(&cm_id_priv->id);
4127 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
4131 static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
4132 struct ib_qp_attr *qp_attr,
4135 unsigned long flags;
4138 spin_lock_irqsave(&cm_id_priv->lock, flags);
4139 switch (cm_id_priv->id.state) {
4140 case IB_CM_REQ_RCVD:
4141 case IB_CM_MRA_REQ_SENT:
4142 case IB_CM_REP_RCVD:
4143 case IB_CM_MRA_REP_SENT:
4144 case IB_CM_REP_SENT:
4145 case IB_CM_MRA_REP_RCVD:
4146 case IB_CM_ESTABLISHED:
4147 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
4148 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
4149 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
4150 qp_attr->path_mtu = cm_id_priv->path_mtu;
4151 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
4152 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
4153 if (cm_id_priv->qp_type == IB_QPT_RC ||
4154 cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
4155 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
4156 IB_QP_MIN_RNR_TIMER;
4157 qp_attr->max_dest_rd_atomic =
4158 cm_id_priv->responder_resources;
4159 qp_attr->min_rnr_timer = 0;
4161 if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr)) {
4162 *qp_attr_mask |= IB_QP_ALT_PATH;
4163 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
4164 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
4165 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
4166 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
4171 trace_icm_qp_rtr_err(&cm_id_priv->id);
4175 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
4179 static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
4180 struct ib_qp_attr *qp_attr,
4183 unsigned long flags;
4186 spin_lock_irqsave(&cm_id_priv->lock, flags);
4187 switch (cm_id_priv->id.state) {
4188 /* Allow transition to RTS before sending REP */
4189 case IB_CM_REQ_RCVD:
4190 case IB_CM_MRA_REQ_SENT:
4192 case IB_CM_REP_RCVD:
4193 case IB_CM_MRA_REP_SENT:
4194 case IB_CM_REP_SENT:
4195 case IB_CM_MRA_REP_RCVD:
4196 case IB_CM_ESTABLISHED:
4197 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
4198 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
4199 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
4200 switch (cm_id_priv->qp_type) {
4202 case IB_QPT_XRC_INI:
4203 *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY |
4204 IB_QP_MAX_QP_RD_ATOMIC;
4205 qp_attr->retry_cnt = cm_id_priv->retry_count;
4206 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
4207 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
4209 case IB_QPT_XRC_TGT:
4210 *qp_attr_mask |= IB_QP_TIMEOUT;
4211 qp_attr->timeout = cm_id_priv->av.timeout;
4216 if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr)) {
4217 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
4218 qp_attr->path_mig_state = IB_MIG_REARM;
4221 *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
4222 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
4223 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
4224 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
4225 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
4226 qp_attr->path_mig_state = IB_MIG_REARM;
4231 trace_icm_qp_rts_err(&cm_id_priv->id);
4235 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
4239 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
4240 struct ib_qp_attr *qp_attr,
4243 struct cm_id_private *cm_id_priv;
4246 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
4247 switch (qp_attr->qp_state) {
4249 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
4252 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
4255 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
4263 EXPORT_SYMBOL(ib_cm_init_qp_attr);
4265 static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr,
4268 struct cm_counter_group *group;
4269 struct cm_counter_attribute *cm_attr;
4271 group = container_of(obj, struct cm_counter_group, obj);
4272 cm_attr = container_of(attr, struct cm_counter_attribute, attr);
4274 return sprintf(buf, "%ld\n",
4275 atomic_long_read(&group->counter[cm_attr->index]));
4278 static const struct sysfs_ops cm_counter_ops = {
4279 .show = cm_show_counter
4282 static struct kobj_type cm_counter_obj_type = {
4283 .sysfs_ops = &cm_counter_ops,
4284 .default_attrs = cm_counter_default_attrs
4287 static int cm_create_port_fs(struct cm_port *port)
4291 for (i = 0; i < CM_COUNTER_GROUPS; i++) {
4292 ret = ib_port_register_module_stat(port->cm_dev->ib_device,
4294 &port->counter_group[i].obj,
4295 &cm_counter_obj_type,
4296 counter_group_names[i]);
4305 ib_port_unregister_module_stat(&port->counter_group[i].obj);
4310 static void cm_remove_port_fs(struct cm_port *port)
4314 for (i = 0; i < CM_COUNTER_GROUPS; i++)
4315 ib_port_unregister_module_stat(&port->counter_group[i].obj);
4319 static int cm_add_one(struct ib_device *ib_device)
4321 struct cm_device *cm_dev;
4322 struct cm_port *port;
4323 struct ib_mad_reg_req reg_req = {
4324 .mgmt_class = IB_MGMT_CLASS_CM,
4325 .mgmt_class_version = IB_CM_CLASS_VERSION,
4327 struct ib_port_modify port_modify = {
4328 .set_port_cap_mask = IB_PORT_CM_SUP
4330 unsigned long flags;
4335 cm_dev = kzalloc(struct_size(cm_dev, port, ib_device->phys_port_cnt),
4340 cm_dev->ib_device = ib_device;
4341 cm_dev->ack_delay = ib_device->attrs.local_ca_ack_delay;
4342 cm_dev->going_down = 0;
4344 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
4345 for (i = 1; i <= ib_device->phys_port_cnt; i++) {
4346 if (!rdma_cap_ib_cm(ib_device, i))
4349 port = kzalloc(sizeof *port, GFP_KERNEL);
4355 cm_dev->port[i-1] = port;
4356 port->cm_dev = cm_dev;
4359 INIT_LIST_HEAD(&port->cm_priv_prim_list);
4360 INIT_LIST_HEAD(&port->cm_priv_altr_list);
4362 ret = cm_create_port_fs(port);
4366 port->mad_agent = ib_register_mad_agent(ib_device, i,
4374 if (IS_ERR(port->mad_agent)) {
4375 ret = PTR_ERR(port->mad_agent);
4379 ret = ib_modify_port(ib_device, i, 0, &port_modify);
4391 ib_set_client_data(ib_device, &cm_client, cm_dev);
4393 write_lock_irqsave(&cm.device_lock, flags);
4394 list_add_tail(&cm_dev->list, &cm.device_list);
4395 write_unlock_irqrestore(&cm.device_lock, flags);
4399 ib_unregister_mad_agent(port->mad_agent);
4401 cm_remove_port_fs(port);
4403 port_modify.set_port_cap_mask = 0;
4404 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
4407 if (!rdma_cap_ib_cm(ib_device, i))
4410 port = cm_dev->port[i-1];
4411 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
4412 ib_unregister_mad_agent(port->mad_agent);
4413 cm_remove_port_fs(port);
4421 static void cm_remove_one(struct ib_device *ib_device, void *client_data)
4423 struct cm_device *cm_dev = client_data;
4424 struct cm_port *port;
4425 struct cm_id_private *cm_id_priv;
4426 struct ib_mad_agent *cur_mad_agent;
4427 struct ib_port_modify port_modify = {
4428 .clr_port_cap_mask = IB_PORT_CM_SUP
4430 unsigned long flags;
4433 write_lock_irqsave(&cm.device_lock, flags);
4434 list_del(&cm_dev->list);
4435 write_unlock_irqrestore(&cm.device_lock, flags);
4437 spin_lock_irq(&cm.lock);
4438 cm_dev->going_down = 1;
4439 spin_unlock_irq(&cm.lock);
4441 for (i = 1; i <= ib_device->phys_port_cnt; i++) {
4442 if (!rdma_cap_ib_cm(ib_device, i))
4445 port = cm_dev->port[i-1];
4446 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
4447 /* Mark all the cm_id's as not valid */
4448 spin_lock_irq(&cm.lock);
4449 list_for_each_entry(cm_id_priv, &port->cm_priv_altr_list, altr_list)
4450 cm_id_priv->altr_send_port_not_ready = 1;
4451 list_for_each_entry(cm_id_priv, &port->cm_priv_prim_list, prim_list)
4452 cm_id_priv->prim_send_port_not_ready = 1;
4453 spin_unlock_irq(&cm.lock);
4455 * We flush the queue here after the going_down set, this
4456 * verify that no new works will be queued in the recv handler,
4457 * after that we can call the unregister_mad_agent
4459 flush_workqueue(cm.wq);
4460 spin_lock_irq(&cm.state_lock);
4461 cur_mad_agent = port->mad_agent;
4462 port->mad_agent = NULL;
4463 spin_unlock_irq(&cm.state_lock);
4464 ib_unregister_mad_agent(cur_mad_agent);
4465 cm_remove_port_fs(port);
4472 static int __init ib_cm_init(void)
4476 INIT_LIST_HEAD(&cm.device_list);
4477 rwlock_init(&cm.device_lock);
4478 spin_lock_init(&cm.lock);
4479 spin_lock_init(&cm.state_lock);
4480 cm.listen_service_table = RB_ROOT;
4481 cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
4482 cm.remote_id_table = RB_ROOT;
4483 cm.remote_qp_table = RB_ROOT;
4484 cm.remote_sidr_table = RB_ROOT;
4485 xa_init_flags(&cm.local_id_table, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
4486 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
4487 INIT_LIST_HEAD(&cm.timewait_list);
4489 cm.wq = alloc_workqueue("ib_cm", 0, 1);
4495 ret = ib_register_client(&cm_client);
4501 destroy_workqueue(cm.wq);
4506 static void __exit ib_cm_cleanup(void)
4508 struct cm_timewait_info *timewait_info, *tmp;
4510 spin_lock_irq(&cm.lock);
4511 list_for_each_entry(timewait_info, &cm.timewait_list, list)
4512 cancel_delayed_work(&timewait_info->work.work);
4513 spin_unlock_irq(&cm.lock);
4515 ib_unregister_client(&cm_client);
4516 destroy_workqueue(cm.wq);
4518 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
4519 list_del(&timewait_info->list);
4520 kfree(timewait_info);
4523 WARN_ON(!xa_empty(&cm.local_id_table));
4526 module_init(ib_cm_init);
4527 module_exit(ib_cm_cleanup);