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.
260 int listen_sharecount
;
263 struct ib_mad_send_buf
*msg
;
264 struct cm_timewait_info
*timewait_info
;
265 /* todo: use alternate port on send failure */
273 enum ib_qp_type qp_type
;
277 enum ib_mtu path_mtu
;
281 u8 responder_resources
;
288 struct list_head prim_list
;
289 struct list_head altr_list
;
290 /* Indicates that the send port mad is registered and av is set */
291 int prim_send_port_not_ready
;
292 int altr_send_port_not_ready
;
294 struct list_head work_list
;
297 struct rdma_ucm_ece ece
;
300 static void cm_work_handler(struct work_struct
*work
);
302 static inline void cm_deref_id(struct cm_id_private
*cm_id_priv
)
304 if (refcount_dec_and_test(&cm_id_priv
->refcount
))
305 complete(&cm_id_priv
->comp
);
308 static int cm_alloc_msg(struct cm_id_private
*cm_id_priv
,
309 struct ib_mad_send_buf
**msg
)
311 struct ib_mad_agent
*mad_agent
;
312 struct ib_mad_send_buf
*m
;
315 unsigned long flags
, flags2
;
318 /* don't let the port to be released till the agent is down */
319 spin_lock_irqsave(&cm
.state_lock
, flags2
);
320 spin_lock_irqsave(&cm
.lock
, flags
);
321 if (!cm_id_priv
->prim_send_port_not_ready
)
322 av
= &cm_id_priv
->av
;
323 else if (!cm_id_priv
->altr_send_port_not_ready
&&
324 (cm_id_priv
->alt_av
.port
))
325 av
= &cm_id_priv
->alt_av
;
327 pr_info("%s: not valid CM id\n", __func__
);
329 spin_unlock_irqrestore(&cm
.lock
, flags
);
332 spin_unlock_irqrestore(&cm
.lock
, flags
);
333 /* Make sure the port haven't released the mad yet */
334 mad_agent
= cm_id_priv
->av
.port
->mad_agent
;
336 pr_info("%s: not a valid MAD agent\n", __func__
);
340 ah
= rdma_create_ah(mad_agent
->qp
->pd
, &av
->ah_attr
, 0);
346 m
= ib_create_send_mad(mad_agent
, cm_id_priv
->id
.remote_cm_qpn
,
348 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
350 IB_MGMT_BASE_VERSION
);
352 rdma_destroy_ah(ah
, 0);
357 /* Timeout set by caller if response is expected. */
359 m
->retries
= cm_id_priv
->max_cm_retries
;
361 refcount_inc(&cm_id_priv
->refcount
);
362 m
->context
[0] = cm_id_priv
;
366 spin_unlock_irqrestore(&cm
.state_lock
, flags2
);
370 static struct ib_mad_send_buf
*cm_alloc_response_msg_no_ah(struct cm_port
*port
,
371 struct ib_mad_recv_wc
*mad_recv_wc
)
373 return ib_create_send_mad(port
->mad_agent
, 1, mad_recv_wc
->wc
->pkey_index
,
374 0, IB_MGMT_MAD_HDR
, IB_MGMT_MAD_DATA
,
376 IB_MGMT_BASE_VERSION
);
379 static int cm_create_response_msg_ah(struct cm_port
*port
,
380 struct ib_mad_recv_wc
*mad_recv_wc
,
381 struct ib_mad_send_buf
*msg
)
385 ah
= ib_create_ah_from_wc(port
->mad_agent
->qp
->pd
, mad_recv_wc
->wc
,
386 mad_recv_wc
->recv_buf
.grh
, port
->port_num
);
394 static void cm_free_msg(struct ib_mad_send_buf
*msg
)
397 rdma_destroy_ah(msg
->ah
, 0);
399 cm_deref_id(msg
->context
[0]);
400 ib_free_send_mad(msg
);
403 static int cm_alloc_response_msg(struct cm_port
*port
,
404 struct ib_mad_recv_wc
*mad_recv_wc
,
405 struct ib_mad_send_buf
**msg
)
407 struct ib_mad_send_buf
*m
;
410 m
= cm_alloc_response_msg_no_ah(port
, mad_recv_wc
);
414 ret
= cm_create_response_msg_ah(port
, mad_recv_wc
, m
);
424 static void *cm_copy_private_data(const void *private_data
, u8 private_data_len
)
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
*
712 cm_insert_remote_id(struct cm_timewait_info
*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
*
771 cm_insert_remote_qpn(struct cm_timewait_info
*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
*
801 cm_insert_remote_sidr(struct cm_id_private
*cm_id_priv
)
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(&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(&cm
.local_id_table
, cm_local_id(cm_id_priv
->id
.local_id
),
882 cm_id_priv
, GFP_ATOMIC
);
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(&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 * ib_cm_insert_listen - Create a new listening ib_cm_id and listen on
1255 * the given service ID.
1257 * If there's an existing ID listening on that same device and service ID,
1260 * @device: Device associated with the cm_id. All related communication will
1261 * be associated with the specified device.
1262 * @cm_handler: Callback invoked to notify the user of CM events.
1263 * @service_id: Service identifier matched against incoming connection
1264 * and service ID resolution requests. The service ID should be specified
1265 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
1266 * assign a service ID to the caller.
1268 * Callers should call ib_destroy_cm_id when done with the listener ID.
1270 struct ib_cm_id
*ib_cm_insert_listen(struct ib_device
*device
,
1271 ib_cm_handler cm_handler
,
1274 struct cm_id_private
*listen_id_priv
;
1275 struct cm_id_private
*cm_id_priv
;
1278 /* Create an ID in advance, since the creation may sleep */
1279 cm_id_priv
= cm_alloc_id_priv(device
, cm_handler
, NULL
);
1280 if (IS_ERR(cm_id_priv
))
1281 return ERR_CAST(cm_id_priv
);
1283 err
= cm_init_listen(cm_id_priv
, service_id
, 0);
1285 return ERR_PTR(err
);
1287 spin_lock_irq(&cm_id_priv
->lock
);
1288 listen_id_priv
= cm_insert_listen(cm_id_priv
, cm_handler
);
1289 if (listen_id_priv
!= cm_id_priv
) {
1290 spin_unlock_irq(&cm_id_priv
->lock
);
1291 ib_destroy_cm_id(&cm_id_priv
->id
);
1292 if (!listen_id_priv
)
1293 return ERR_PTR(-EINVAL
);
1294 return &listen_id_priv
->id
;
1296 cm_id_priv
->id
.state
= IB_CM_LISTEN
;
1297 spin_unlock_irq(&cm_id_priv
->lock
);
1300 * A listen ID does not need to be in the xarray since it does not
1301 * receive mads, is not placed in the remote_id or remote_qpn rbtree,
1302 * and does not enter timewait.
1305 return &cm_id_priv
->id
;
1307 EXPORT_SYMBOL(ib_cm_insert_listen
);
1309 static __be64
cm_form_tid(struct cm_id_private
*cm_id_priv
)
1311 u64 hi_tid
, low_tid
;
1313 hi_tid
= ((u64
) cm_id_priv
->av
.port
->mad_agent
->hi_tid
) << 32;
1314 low_tid
= (u64
)cm_id_priv
->id
.local_id
;
1315 return cpu_to_be64(hi_tid
| low_tid
);
1318 static void cm_format_mad_hdr(struct ib_mad_hdr
*hdr
,
1319 __be16 attr_id
, __be64 tid
)
1321 hdr
->base_version
= IB_MGMT_BASE_VERSION
;
1322 hdr
->mgmt_class
= IB_MGMT_CLASS_CM
;
1323 hdr
->class_version
= IB_CM_CLASS_VERSION
;
1324 hdr
->method
= IB_MGMT_METHOD_SEND
;
1325 hdr
->attr_id
= attr_id
;
1329 static void cm_format_mad_ece_hdr(struct ib_mad_hdr
*hdr
, __be16 attr_id
,
1330 __be64 tid
, u32 attr_mod
)
1332 cm_format_mad_hdr(hdr
, attr_id
, tid
);
1333 hdr
->attr_mod
= cpu_to_be32(attr_mod
);
1336 static void cm_format_req(struct cm_req_msg
*req_msg
,
1337 struct cm_id_private
*cm_id_priv
,
1338 struct ib_cm_req_param
*param
)
1340 struct sa_path_rec
*pri_path
= param
->primary_path
;
1341 struct sa_path_rec
*alt_path
= param
->alternate_path
;
1342 bool pri_ext
= false;
1344 if (pri_path
->rec_type
== SA_PATH_REC_TYPE_OPA
)
1345 pri_ext
= opa_is_extended_lid(pri_path
->opa
.dlid
,
1346 pri_path
->opa
.slid
);
1348 cm_format_mad_ece_hdr(&req_msg
->hdr
, CM_REQ_ATTR_ID
,
1349 cm_form_tid(cm_id_priv
), param
->ece
.attr_mod
);
1351 IBA_SET(CM_REQ_LOCAL_COMM_ID
, req_msg
,
1352 be32_to_cpu(cm_id_priv
->id
.local_id
));
1353 IBA_SET(CM_REQ_SERVICE_ID
, req_msg
, be64_to_cpu(param
->service_id
));
1354 IBA_SET(CM_REQ_LOCAL_CA_GUID
, req_msg
,
1355 be64_to_cpu(cm_id_priv
->id
.device
->node_guid
));
1356 IBA_SET(CM_REQ_LOCAL_QPN
, req_msg
, param
->qp_num
);
1357 IBA_SET(CM_REQ_INITIATOR_DEPTH
, req_msg
, param
->initiator_depth
);
1358 IBA_SET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT
, req_msg
,
1359 param
->remote_cm_response_timeout
);
1360 cm_req_set_qp_type(req_msg
, param
->qp_type
);
1361 IBA_SET(CM_REQ_END_TO_END_FLOW_CONTROL
, req_msg
, param
->flow_control
);
1362 IBA_SET(CM_REQ_STARTING_PSN
, req_msg
, param
->starting_psn
);
1363 IBA_SET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT
, req_msg
,
1364 param
->local_cm_response_timeout
);
1365 IBA_SET(CM_REQ_PARTITION_KEY
, req_msg
,
1366 be16_to_cpu(param
->primary_path
->pkey
));
1367 IBA_SET(CM_REQ_PATH_PACKET_PAYLOAD_MTU
, req_msg
,
1368 param
->primary_path
->mtu
);
1369 IBA_SET(CM_REQ_MAX_CM_RETRIES
, req_msg
, param
->max_cm_retries
);
1371 if (param
->qp_type
!= IB_QPT_XRC_INI
) {
1372 IBA_SET(CM_REQ_RESPONDER_RESOURCES
, req_msg
,
1373 param
->responder_resources
);
1374 IBA_SET(CM_REQ_RETRY_COUNT
, req_msg
, param
->retry_count
);
1375 IBA_SET(CM_REQ_RNR_RETRY_COUNT
, req_msg
,
1376 param
->rnr_retry_count
);
1377 IBA_SET(CM_REQ_SRQ
, req_msg
, param
->srq
);
1380 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID
, req_msg
) =
1382 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID
, req_msg
) =
1385 IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID
, req_msg
)
1386 ->global
.interface_id
=
1387 OPA_MAKE_ID(be32_to_cpu(pri_path
->opa
.slid
));
1388 IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID
, req_msg
)
1389 ->global
.interface_id
=
1390 OPA_MAKE_ID(be32_to_cpu(pri_path
->opa
.dlid
));
1392 if (pri_path
->hop_limit
<= 1) {
1393 IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID
, req_msg
,
1394 be16_to_cpu(pri_ext
? 0 :
1395 htons(ntohl(sa_path_get_slid(
1397 IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID
, req_msg
,
1398 be16_to_cpu(pri_ext
? 0 :
1399 htons(ntohl(sa_path_get_dlid(
1402 /* Work-around until there's a way to obtain remote LID info */
1403 IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID
, req_msg
,
1404 be16_to_cpu(IB_LID_PERMISSIVE
));
1405 IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID
, req_msg
,
1406 be16_to_cpu(IB_LID_PERMISSIVE
));
1408 IBA_SET(CM_REQ_PRIMARY_FLOW_LABEL
, req_msg
,
1409 be32_to_cpu(pri_path
->flow_label
));
1410 IBA_SET(CM_REQ_PRIMARY_PACKET_RATE
, req_msg
, pri_path
->rate
);
1411 IBA_SET(CM_REQ_PRIMARY_TRAFFIC_CLASS
, req_msg
, pri_path
->traffic_class
);
1412 IBA_SET(CM_REQ_PRIMARY_HOP_LIMIT
, req_msg
, pri_path
->hop_limit
);
1413 IBA_SET(CM_REQ_PRIMARY_SL
, req_msg
, pri_path
->sl
);
1414 IBA_SET(CM_REQ_PRIMARY_SUBNET_LOCAL
, req_msg
,
1415 (pri_path
->hop_limit
<= 1));
1416 IBA_SET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT
, req_msg
,
1417 cm_ack_timeout(cm_id_priv
->av
.port
->cm_dev
->ack_delay
,
1418 pri_path
->packet_life_time
));
1421 bool alt_ext
= false;
1423 if (alt_path
->rec_type
== SA_PATH_REC_TYPE_OPA
)
1424 alt_ext
= opa_is_extended_lid(alt_path
->opa
.dlid
,
1425 alt_path
->opa
.slid
);
1427 *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID
, req_msg
) =
1429 *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID
, req_msg
) =
1432 IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID
,
1434 ->global
.interface_id
=
1435 OPA_MAKE_ID(be32_to_cpu(alt_path
->opa
.slid
));
1436 IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID
,
1438 ->global
.interface_id
=
1439 OPA_MAKE_ID(be32_to_cpu(alt_path
->opa
.dlid
));
1441 if (alt_path
->hop_limit
<= 1) {
1442 IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID
, req_msg
,
1445 htons(ntohl(sa_path_get_slid(
1447 IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID
, req_msg
,
1450 htons(ntohl(sa_path_get_dlid(
1453 IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID
, req_msg
,
1454 be16_to_cpu(IB_LID_PERMISSIVE
));
1455 IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID
, req_msg
,
1456 be16_to_cpu(IB_LID_PERMISSIVE
));
1458 IBA_SET(CM_REQ_ALTERNATE_FLOW_LABEL
, req_msg
,
1459 be32_to_cpu(alt_path
->flow_label
));
1460 IBA_SET(CM_REQ_ALTERNATE_PACKET_RATE
, req_msg
, alt_path
->rate
);
1461 IBA_SET(CM_REQ_ALTERNATE_TRAFFIC_CLASS
, req_msg
,
1462 alt_path
->traffic_class
);
1463 IBA_SET(CM_REQ_ALTERNATE_HOP_LIMIT
, req_msg
,
1464 alt_path
->hop_limit
);
1465 IBA_SET(CM_REQ_ALTERNATE_SL
, req_msg
, alt_path
->sl
);
1466 IBA_SET(CM_REQ_ALTERNATE_SUBNET_LOCAL
, req_msg
,
1467 (alt_path
->hop_limit
<= 1));
1468 IBA_SET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT
, req_msg
,
1469 cm_ack_timeout(cm_id_priv
->av
.port
->cm_dev
->ack_delay
,
1470 alt_path
->packet_life_time
));
1472 IBA_SET(CM_REQ_VENDOR_ID
, req_msg
, param
->ece
.vendor_id
);
1474 if (param
->private_data
&& param
->private_data_len
)
1475 IBA_SET_MEM(CM_REQ_PRIVATE_DATA
, req_msg
, param
->private_data
,
1476 param
->private_data_len
);
1479 static int cm_validate_req_param(struct ib_cm_req_param
*param
)
1481 if (!param
->primary_path
)
1484 if (param
->qp_type
!= IB_QPT_RC
&& param
->qp_type
!= IB_QPT_UC
&&
1485 param
->qp_type
!= IB_QPT_XRC_INI
)
1488 if (param
->private_data
&&
1489 param
->private_data_len
> IB_CM_REQ_PRIVATE_DATA_SIZE
)
1492 if (param
->alternate_path
&&
1493 (param
->alternate_path
->pkey
!= param
->primary_path
->pkey
||
1494 param
->alternate_path
->mtu
!= param
->primary_path
->mtu
))
1500 int ib_send_cm_req(struct ib_cm_id
*cm_id
,
1501 struct ib_cm_req_param
*param
)
1503 struct cm_id_private
*cm_id_priv
;
1504 struct cm_req_msg
*req_msg
;
1505 unsigned long flags
;
1508 ret
= cm_validate_req_param(param
);
1512 /* Verify that we're not in timewait. */
1513 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
1514 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1515 if (cm_id
->state
!= IB_CM_IDLE
|| WARN_ON(cm_id_priv
->timewait_info
)) {
1516 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1520 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1522 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
1524 if (IS_ERR(cm_id_priv
->timewait_info
)) {
1525 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
1526 cm_id_priv
->timewait_info
= NULL
;
1530 ret
= cm_init_av_by_path(param
->primary_path
,
1531 param
->ppath_sgid_attr
, &cm_id_priv
->av
,
1535 if (param
->alternate_path
) {
1536 ret
= cm_init_av_by_path(param
->alternate_path
, NULL
,
1537 &cm_id_priv
->alt_av
, cm_id_priv
);
1541 cm_id
->service_id
= param
->service_id
;
1542 cm_id
->service_mask
= ~cpu_to_be64(0);
1543 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
1544 param
->primary_path
->packet_life_time
) * 2 +
1546 param
->remote_cm_response_timeout
);
1547 cm_id_priv
->max_cm_retries
= param
->max_cm_retries
;
1548 cm_id_priv
->initiator_depth
= param
->initiator_depth
;
1549 cm_id_priv
->responder_resources
= param
->responder_resources
;
1550 cm_id_priv
->retry_count
= param
->retry_count
;
1551 cm_id_priv
->path_mtu
= param
->primary_path
->mtu
;
1552 cm_id_priv
->pkey
= param
->primary_path
->pkey
;
1553 cm_id_priv
->qp_type
= param
->qp_type
;
1555 ret
= cm_alloc_msg(cm_id_priv
, &cm_id_priv
->msg
);
1559 req_msg
= (struct cm_req_msg
*) cm_id_priv
->msg
->mad
;
1560 cm_format_req(req_msg
, cm_id_priv
, param
);
1561 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
1562 cm_id_priv
->msg
->timeout_ms
= cm_id_priv
->timeout_ms
;
1563 cm_id_priv
->msg
->context
[1] = (void *) (unsigned long) IB_CM_REQ_SENT
;
1565 cm_id_priv
->local_qpn
= cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN
, req_msg
));
1566 cm_id_priv
->rq_psn
= cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN
, req_msg
));
1568 trace_icm_send_req(&cm_id_priv
->id
);
1569 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
1570 ret
= ib_post_send_mad(cm_id_priv
->msg
, NULL
);
1572 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1575 BUG_ON(cm_id
->state
!= IB_CM_IDLE
);
1576 cm_id
->state
= IB_CM_REQ_SENT
;
1577 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
1580 error2
: cm_free_msg(cm_id_priv
->msg
);
1583 EXPORT_SYMBOL(ib_send_cm_req
);
1585 static int cm_issue_rej(struct cm_port
*port
,
1586 struct ib_mad_recv_wc
*mad_recv_wc
,
1587 enum ib_cm_rej_reason reason
,
1588 enum cm_msg_response msg_rejected
,
1589 void *ari
, u8 ari_length
)
1591 struct ib_mad_send_buf
*msg
= NULL
;
1592 struct cm_rej_msg
*rej_msg
, *rcv_msg
;
1595 ret
= cm_alloc_response_msg(port
, mad_recv_wc
, &msg
);
1599 /* We just need common CM header information. Cast to any message. */
1600 rcv_msg
= (struct cm_rej_msg
*) mad_recv_wc
->recv_buf
.mad
;
1601 rej_msg
= (struct cm_rej_msg
*) msg
->mad
;
1603 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, rcv_msg
->hdr
.tid
);
1604 IBA_SET(CM_REJ_REMOTE_COMM_ID
, rej_msg
,
1605 IBA_GET(CM_REJ_LOCAL_COMM_ID
, rcv_msg
));
1606 IBA_SET(CM_REJ_LOCAL_COMM_ID
, rej_msg
,
1607 IBA_GET(CM_REJ_REMOTE_COMM_ID
, rcv_msg
));
1608 IBA_SET(CM_REJ_MESSAGE_REJECTED
, rej_msg
, msg_rejected
);
1609 IBA_SET(CM_REJ_REASON
, rej_msg
, reason
);
1611 if (ari
&& ari_length
) {
1612 IBA_SET(CM_REJ_REJECTED_INFO_LENGTH
, rej_msg
, ari_length
);
1613 IBA_SET_MEM(CM_REJ_ARI
, rej_msg
, ari
, ari_length
);
1616 trace_icm_issue_rej(
1617 IBA_GET(CM_REJ_LOCAL_COMM_ID
, rcv_msg
),
1618 IBA_GET(CM_REJ_REMOTE_COMM_ID
, rcv_msg
));
1619 ret
= ib_post_send_mad(msg
, NULL
);
1626 static bool cm_req_has_alt_path(struct cm_req_msg
*req_msg
)
1628 return ((cpu_to_be16(
1629 IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID
, req_msg
))) ||
1630 (ib_is_opa_gid(IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID
,
1634 static void cm_path_set_rec_type(struct ib_device
*ib_device
, u32 port_num
,
1635 struct sa_path_rec
*path
, union ib_gid
*gid
)
1637 if (ib_is_opa_gid(gid
) && rdma_cap_opa_ah(ib_device
, port_num
))
1638 path
->rec_type
= SA_PATH_REC_TYPE_OPA
;
1640 path
->rec_type
= SA_PATH_REC_TYPE_IB
;
1643 static void cm_format_path_lid_from_req(struct cm_req_msg
*req_msg
,
1644 struct sa_path_rec
*primary_path
,
1645 struct sa_path_rec
*alt_path
)
1649 if (primary_path
->rec_type
!= SA_PATH_REC_TYPE_OPA
) {
1650 sa_path_set_dlid(primary_path
,
1651 IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID
,
1653 sa_path_set_slid(primary_path
,
1654 IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID
,
1657 lid
= opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1658 CM_REQ_PRIMARY_LOCAL_PORT_GID
, req_msg
));
1659 sa_path_set_dlid(primary_path
, lid
);
1661 lid
= opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1662 CM_REQ_PRIMARY_REMOTE_PORT_GID
, req_msg
));
1663 sa_path_set_slid(primary_path
, lid
);
1666 if (!cm_req_has_alt_path(req_msg
))
1669 if (alt_path
->rec_type
!= SA_PATH_REC_TYPE_OPA
) {
1670 sa_path_set_dlid(alt_path
,
1671 IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID
,
1673 sa_path_set_slid(alt_path
,
1674 IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID
,
1677 lid
= opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1678 CM_REQ_ALTERNATE_LOCAL_PORT_GID
, req_msg
));
1679 sa_path_set_dlid(alt_path
, lid
);
1681 lid
= opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1682 CM_REQ_ALTERNATE_REMOTE_PORT_GID
, req_msg
));
1683 sa_path_set_slid(alt_path
, lid
);
1687 static void cm_format_paths_from_req(struct cm_req_msg
*req_msg
,
1688 struct sa_path_rec
*primary_path
,
1689 struct sa_path_rec
*alt_path
)
1691 primary_path
->dgid
=
1692 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID
, req_msg
);
1693 primary_path
->sgid
=
1694 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID
, req_msg
);
1695 primary_path
->flow_label
=
1696 cpu_to_be32(IBA_GET(CM_REQ_PRIMARY_FLOW_LABEL
, req_msg
));
1697 primary_path
->hop_limit
= IBA_GET(CM_REQ_PRIMARY_HOP_LIMIT
, req_msg
);
1698 primary_path
->traffic_class
=
1699 IBA_GET(CM_REQ_PRIMARY_TRAFFIC_CLASS
, req_msg
);
1700 primary_path
->reversible
= 1;
1701 primary_path
->pkey
=
1702 cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY
, req_msg
));
1703 primary_path
->sl
= IBA_GET(CM_REQ_PRIMARY_SL
, req_msg
);
1704 primary_path
->mtu_selector
= IB_SA_EQ
;
1705 primary_path
->mtu
= IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU
, req_msg
);
1706 primary_path
->rate_selector
= IB_SA_EQ
;
1707 primary_path
->rate
= IBA_GET(CM_REQ_PRIMARY_PACKET_RATE
, req_msg
);
1708 primary_path
->packet_life_time_selector
= IB_SA_EQ
;
1709 primary_path
->packet_life_time
=
1710 IBA_GET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT
, req_msg
);
1711 primary_path
->packet_life_time
-= (primary_path
->packet_life_time
> 0);
1712 primary_path
->service_id
=
1713 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID
, req_msg
));
1714 if (sa_path_is_roce(primary_path
))
1715 primary_path
->roce
.route_resolved
= false;
1717 if (cm_req_has_alt_path(req_msg
)) {
1718 alt_path
->dgid
= *IBA_GET_MEM_PTR(
1719 CM_REQ_ALTERNATE_LOCAL_PORT_GID
, req_msg
);
1720 alt_path
->sgid
= *IBA_GET_MEM_PTR(
1721 CM_REQ_ALTERNATE_REMOTE_PORT_GID
, req_msg
);
1722 alt_path
->flow_label
= cpu_to_be32(
1723 IBA_GET(CM_REQ_ALTERNATE_FLOW_LABEL
, req_msg
));
1724 alt_path
->hop_limit
=
1725 IBA_GET(CM_REQ_ALTERNATE_HOP_LIMIT
, req_msg
);
1726 alt_path
->traffic_class
=
1727 IBA_GET(CM_REQ_ALTERNATE_TRAFFIC_CLASS
, req_msg
);
1728 alt_path
->reversible
= 1;
1730 cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY
, req_msg
));
1731 alt_path
->sl
= IBA_GET(CM_REQ_ALTERNATE_SL
, req_msg
);
1732 alt_path
->mtu_selector
= IB_SA_EQ
;
1734 IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU
, req_msg
);
1735 alt_path
->rate_selector
= IB_SA_EQ
;
1736 alt_path
->rate
= IBA_GET(CM_REQ_ALTERNATE_PACKET_RATE
, req_msg
);
1737 alt_path
->packet_life_time_selector
= IB_SA_EQ
;
1738 alt_path
->packet_life_time
=
1739 IBA_GET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT
, req_msg
);
1740 alt_path
->packet_life_time
-= (alt_path
->packet_life_time
> 0);
1741 alt_path
->service_id
=
1742 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID
, req_msg
));
1744 if (sa_path_is_roce(alt_path
))
1745 alt_path
->roce
.route_resolved
= false;
1747 cm_format_path_lid_from_req(req_msg
, primary_path
, alt_path
);
1750 static u16
cm_get_bth_pkey(struct cm_work
*work
)
1752 struct ib_device
*ib_dev
= work
->port
->cm_dev
->ib_device
;
1753 u32 port_num
= work
->port
->port_num
;
1754 u16 pkey_index
= work
->mad_recv_wc
->wc
->pkey_index
;
1758 ret
= ib_get_cached_pkey(ib_dev
, port_num
, pkey_index
, &pkey
);
1760 dev_warn_ratelimited(&ib_dev
->dev
, "ib_cm: Couldn't retrieve pkey for incoming request (port %d, pkey index %d). %d\n",
1761 port_num
, pkey_index
, ret
);
1769 * cm_opa_to_ib_sgid - Convert OPA SGID to IB SGID
1770 * ULPs (such as IPoIB) do not understand OPA GIDs and will
1771 * reject them as the local_gid will not match the sgid. Therefore,
1772 * change the pathrec's SGID to an IB SGID.
1774 * @work: Work completion
1775 * @path: Path record
1777 static void cm_opa_to_ib_sgid(struct cm_work
*work
,
1778 struct sa_path_rec
*path
)
1780 struct ib_device
*dev
= work
->port
->cm_dev
->ib_device
;
1781 u32 port_num
= work
->port
->port_num
;
1783 if (rdma_cap_opa_ah(dev
, port_num
) &&
1784 (ib_is_opa_gid(&path
->sgid
))) {
1787 if (rdma_query_gid(dev
, port_num
, 0, &sgid
)) {
1789 "Error updating sgid in CM request\n");
1797 static void cm_format_req_event(struct cm_work
*work
,
1798 struct cm_id_private
*cm_id_priv
,
1799 struct ib_cm_id
*listen_id
)
1801 struct cm_req_msg
*req_msg
;
1802 struct ib_cm_req_event_param
*param
;
1804 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1805 param
= &work
->cm_event
.param
.req_rcvd
;
1806 param
->listen_id
= listen_id
;
1807 param
->bth_pkey
= cm_get_bth_pkey(work
);
1808 param
->port
= cm_id_priv
->av
.port
->port_num
;
1809 param
->primary_path
= &work
->path
[0];
1810 cm_opa_to_ib_sgid(work
, param
->primary_path
);
1811 if (cm_req_has_alt_path(req_msg
)) {
1812 param
->alternate_path
= &work
->path
[1];
1813 cm_opa_to_ib_sgid(work
, param
->alternate_path
);
1815 param
->alternate_path
= NULL
;
1817 param
->remote_ca_guid
=
1818 cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID
, req_msg
));
1819 param
->remote_qkey
= IBA_GET(CM_REQ_LOCAL_Q_KEY
, req_msg
);
1820 param
->remote_qpn
= IBA_GET(CM_REQ_LOCAL_QPN
, req_msg
);
1821 param
->qp_type
= cm_req_get_qp_type(req_msg
);
1822 param
->starting_psn
= IBA_GET(CM_REQ_STARTING_PSN
, req_msg
);
1823 param
->responder_resources
= IBA_GET(CM_REQ_INITIATOR_DEPTH
, req_msg
);
1824 param
->initiator_depth
= IBA_GET(CM_REQ_RESPONDER_RESOURCES
, req_msg
);
1825 param
->local_cm_response_timeout
=
1826 IBA_GET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT
, req_msg
);
1827 param
->flow_control
= IBA_GET(CM_REQ_END_TO_END_FLOW_CONTROL
, req_msg
);
1828 param
->remote_cm_response_timeout
=
1829 IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT
, req_msg
);
1830 param
->retry_count
= IBA_GET(CM_REQ_RETRY_COUNT
, req_msg
);
1831 param
->rnr_retry_count
= IBA_GET(CM_REQ_RNR_RETRY_COUNT
, req_msg
);
1832 param
->srq
= IBA_GET(CM_REQ_SRQ
, req_msg
);
1833 param
->ppath_sgid_attr
= cm_id_priv
->av
.ah_attr
.grh
.sgid_attr
;
1834 param
->ece
.vendor_id
= IBA_GET(CM_REQ_VENDOR_ID
, req_msg
);
1835 param
->ece
.attr_mod
= be32_to_cpu(req_msg
->hdr
.attr_mod
);
1837 work
->cm_event
.private_data
=
1838 IBA_GET_MEM_PTR(CM_REQ_PRIVATE_DATA
, req_msg
);
1841 static void cm_process_work(struct cm_id_private
*cm_id_priv
,
1842 struct cm_work
*work
)
1846 /* We will typically only have the current event to report. */
1847 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &work
->cm_event
);
1850 while (!ret
&& !atomic_add_negative(-1, &cm_id_priv
->work_count
)) {
1851 spin_lock_irq(&cm_id_priv
->lock
);
1852 work
= cm_dequeue_work(cm_id_priv
);
1853 spin_unlock_irq(&cm_id_priv
->lock
);
1857 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
,
1861 cm_deref_id(cm_id_priv
);
1863 cm_destroy_id(&cm_id_priv
->id
, ret
);
1866 static void cm_format_mra(struct cm_mra_msg
*mra_msg
,
1867 struct cm_id_private
*cm_id_priv
,
1868 enum cm_msg_response msg_mraed
, u8 service_timeout
,
1869 const void *private_data
, u8 private_data_len
)
1871 cm_format_mad_hdr(&mra_msg
->hdr
, CM_MRA_ATTR_ID
, cm_id_priv
->tid
);
1872 IBA_SET(CM_MRA_MESSAGE_MRAED
, mra_msg
, msg_mraed
);
1873 IBA_SET(CM_MRA_LOCAL_COMM_ID
, mra_msg
,
1874 be32_to_cpu(cm_id_priv
->id
.local_id
));
1875 IBA_SET(CM_MRA_REMOTE_COMM_ID
, mra_msg
,
1876 be32_to_cpu(cm_id_priv
->id
.remote_id
));
1877 IBA_SET(CM_MRA_SERVICE_TIMEOUT
, mra_msg
, service_timeout
);
1879 if (private_data
&& private_data_len
)
1880 IBA_SET_MEM(CM_MRA_PRIVATE_DATA
, mra_msg
, private_data
,
1884 static void cm_format_rej(struct cm_rej_msg
*rej_msg
,
1885 struct cm_id_private
*cm_id_priv
,
1886 enum ib_cm_rej_reason reason
, void *ari
,
1887 u8 ari_length
, const void *private_data
,
1888 u8 private_data_len
, enum ib_cm_state state
)
1890 lockdep_assert_held(&cm_id_priv
->lock
);
1892 cm_format_mad_hdr(&rej_msg
->hdr
, CM_REJ_ATTR_ID
, cm_id_priv
->tid
);
1893 IBA_SET(CM_REJ_REMOTE_COMM_ID
, rej_msg
,
1894 be32_to_cpu(cm_id_priv
->id
.remote_id
));
1897 case IB_CM_REQ_RCVD
:
1898 IBA_SET(CM_REJ_LOCAL_COMM_ID
, rej_msg
, be32_to_cpu(0));
1899 IBA_SET(CM_REJ_MESSAGE_REJECTED
, rej_msg
, CM_MSG_RESPONSE_REQ
);
1901 case IB_CM_MRA_REQ_SENT
:
1902 IBA_SET(CM_REJ_LOCAL_COMM_ID
, rej_msg
,
1903 be32_to_cpu(cm_id_priv
->id
.local_id
));
1904 IBA_SET(CM_REJ_MESSAGE_REJECTED
, rej_msg
, CM_MSG_RESPONSE_REQ
);
1906 case IB_CM_REP_RCVD
:
1907 case IB_CM_MRA_REP_SENT
:
1908 IBA_SET(CM_REJ_LOCAL_COMM_ID
, rej_msg
,
1909 be32_to_cpu(cm_id_priv
->id
.local_id
));
1910 IBA_SET(CM_REJ_MESSAGE_REJECTED
, rej_msg
, CM_MSG_RESPONSE_REP
);
1913 IBA_SET(CM_REJ_LOCAL_COMM_ID
, rej_msg
,
1914 be32_to_cpu(cm_id_priv
->id
.local_id
));
1915 IBA_SET(CM_REJ_MESSAGE_REJECTED
, rej_msg
,
1916 CM_MSG_RESPONSE_OTHER
);
1920 IBA_SET(CM_REJ_REASON
, rej_msg
, reason
);
1921 if (ari
&& ari_length
) {
1922 IBA_SET(CM_REJ_REJECTED_INFO_LENGTH
, rej_msg
, ari_length
);
1923 IBA_SET_MEM(CM_REJ_ARI
, rej_msg
, ari
, ari_length
);
1926 if (private_data
&& private_data_len
)
1927 IBA_SET_MEM(CM_REJ_PRIVATE_DATA
, rej_msg
, private_data
,
1931 static void cm_dup_req_handler(struct cm_work
*work
,
1932 struct cm_id_private
*cm_id_priv
)
1934 struct ib_mad_send_buf
*msg
= NULL
;
1937 atomic_long_inc(&work
->port
->counter_group
[CM_RECV_DUPLICATES
].
1938 counter
[CM_REQ_COUNTER
]);
1940 /* Quick state check to discard duplicate REQs. */
1941 spin_lock_irq(&cm_id_priv
->lock
);
1942 if (cm_id_priv
->id
.state
== IB_CM_REQ_RCVD
) {
1943 spin_unlock_irq(&cm_id_priv
->lock
);
1946 spin_unlock_irq(&cm_id_priv
->lock
);
1948 ret
= cm_alloc_response_msg(work
->port
, work
->mad_recv_wc
, &msg
);
1952 spin_lock_irq(&cm_id_priv
->lock
);
1953 switch (cm_id_priv
->id
.state
) {
1954 case IB_CM_MRA_REQ_SENT
:
1955 cm_format_mra((struct cm_mra_msg
*) msg
->mad
, cm_id_priv
,
1956 CM_MSG_RESPONSE_REQ
, cm_id_priv
->service_timeout
,
1957 cm_id_priv
->private_data
,
1958 cm_id_priv
->private_data_len
);
1960 case IB_CM_TIMEWAIT
:
1961 cm_format_rej((struct cm_rej_msg
*)msg
->mad
, cm_id_priv
,
1962 IB_CM_REJ_STALE_CONN
, NULL
, 0, NULL
, 0,
1968 spin_unlock_irq(&cm_id_priv
->lock
);
1970 trace_icm_send_dup_req(&cm_id_priv
->id
);
1971 ret
= ib_post_send_mad(msg
, NULL
);
1976 unlock
: spin_unlock_irq(&cm_id_priv
->lock
);
1977 free
: cm_free_msg(msg
);
1980 static struct cm_id_private
*cm_match_req(struct cm_work
*work
,
1981 struct cm_id_private
*cm_id_priv
)
1983 struct cm_id_private
*listen_cm_id_priv
, *cur_cm_id_priv
;
1984 struct cm_timewait_info
*timewait_info
;
1985 struct cm_req_msg
*req_msg
;
1987 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
1989 /* Check for possible duplicate REQ. */
1990 spin_lock_irq(&cm
.lock
);
1991 timewait_info
= cm_insert_remote_id(cm_id_priv
->timewait_info
);
1992 if (timewait_info
) {
1993 cur_cm_id_priv
= cm_acquire_id(timewait_info
->work
.local_id
,
1994 timewait_info
->work
.remote_id
);
1995 spin_unlock_irq(&cm
.lock
);
1996 if (cur_cm_id_priv
) {
1997 cm_dup_req_handler(work
, cur_cm_id_priv
);
1998 cm_deref_id(cur_cm_id_priv
);
2003 /* Check for stale connections. */
2004 timewait_info
= cm_insert_remote_qpn(cm_id_priv
->timewait_info
);
2005 if (timewait_info
) {
2006 cm_remove_remote(cm_id_priv
);
2007 cur_cm_id_priv
= cm_acquire_id(timewait_info
->work
.local_id
,
2008 timewait_info
->work
.remote_id
);
2010 spin_unlock_irq(&cm
.lock
);
2011 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
2012 IB_CM_REJ_STALE_CONN
, CM_MSG_RESPONSE_REQ
,
2014 if (cur_cm_id_priv
) {
2015 ib_send_cm_dreq(&cur_cm_id_priv
->id
, NULL
, 0);
2016 cm_deref_id(cur_cm_id_priv
);
2021 /* Find matching listen request. */
2022 listen_cm_id_priv
= cm_find_listen(
2023 cm_id_priv
->id
.device
,
2024 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID
, req_msg
)));
2025 if (!listen_cm_id_priv
) {
2026 cm_remove_remote(cm_id_priv
);
2027 spin_unlock_irq(&cm
.lock
);
2028 cm_issue_rej(work
->port
, work
->mad_recv_wc
,
2029 IB_CM_REJ_INVALID_SERVICE_ID
, CM_MSG_RESPONSE_REQ
,
2033 spin_unlock_irq(&cm
.lock
);
2034 return listen_cm_id_priv
;
2038 * Work-around for inter-subnet connections. If the LIDs are permissive,
2039 * we need to override the LID/SL data in the REQ with the LID information
2040 * in the work completion.
2042 static void cm_process_routed_req(struct cm_req_msg
*req_msg
, struct ib_wc
*wc
)
2044 if (!IBA_GET(CM_REQ_PRIMARY_SUBNET_LOCAL
, req_msg
)) {
2045 if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID
,
2046 req_msg
)) == IB_LID_PERMISSIVE
) {
2047 IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID
, req_msg
,
2048 be16_to_cpu(ib_lid_be16(wc
->slid
)));
2049 IBA_SET(CM_REQ_PRIMARY_SL
, req_msg
, wc
->sl
);
2052 if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID
,
2053 req_msg
)) == IB_LID_PERMISSIVE
)
2054 IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID
, req_msg
,
2055 wc
->dlid_path_bits
);
2058 if (!IBA_GET(CM_REQ_ALTERNATE_SUBNET_LOCAL
, req_msg
)) {
2059 if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID
,
2060 req_msg
)) == IB_LID_PERMISSIVE
) {
2061 IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID
, req_msg
,
2062 be16_to_cpu(ib_lid_be16(wc
->slid
)));
2063 IBA_SET(CM_REQ_ALTERNATE_SL
, req_msg
, wc
->sl
);
2066 if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID
,
2067 req_msg
)) == IB_LID_PERMISSIVE
)
2068 IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID
, req_msg
,
2069 wc
->dlid_path_bits
);
2073 static int cm_req_handler(struct cm_work
*work
)
2075 struct cm_id_private
*cm_id_priv
, *listen_cm_id_priv
;
2076 struct cm_req_msg
*req_msg
;
2077 const struct ib_global_route
*grh
;
2078 const struct ib_gid_attr
*gid_attr
;
2081 req_msg
= (struct cm_req_msg
*)work
->mad_recv_wc
->recv_buf
.mad
;
2084 cm_alloc_id_priv(work
->port
->cm_dev
->ib_device
, NULL
, NULL
);
2085 if (IS_ERR(cm_id_priv
))
2086 return PTR_ERR(cm_id_priv
);
2088 cm_id_priv
->id
.remote_id
=
2089 cpu_to_be32(IBA_GET(CM_REQ_LOCAL_COMM_ID
, req_msg
));
2090 cm_id_priv
->id
.service_id
=
2091 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID
, req_msg
));
2092 cm_id_priv
->id
.service_mask
= ~cpu_to_be64(0);
2093 cm_id_priv
->tid
= req_msg
->hdr
.tid
;
2094 cm_id_priv
->timeout_ms
= cm_convert_to_ms(
2095 IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT
, req_msg
));
2096 cm_id_priv
->max_cm_retries
= IBA_GET(CM_REQ_MAX_CM_RETRIES
, req_msg
);
2097 cm_id_priv
->remote_qpn
=
2098 cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN
, req_msg
));
2099 cm_id_priv
->initiator_depth
=
2100 IBA_GET(CM_REQ_RESPONDER_RESOURCES
, req_msg
);
2101 cm_id_priv
->responder_resources
=
2102 IBA_GET(CM_REQ_INITIATOR_DEPTH
, req_msg
);
2103 cm_id_priv
->path_mtu
= IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU
, req_msg
);
2104 cm_id_priv
->pkey
= cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY
, req_msg
));
2105 cm_id_priv
->sq_psn
= cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN
, req_msg
));
2106 cm_id_priv
->retry_count
= IBA_GET(CM_REQ_RETRY_COUNT
, req_msg
);
2107 cm_id_priv
->rnr_retry_count
= IBA_GET(CM_REQ_RNR_RETRY_COUNT
, req_msg
);
2108 cm_id_priv
->qp_type
= cm_req_get_qp_type(req_msg
);
2110 ret
= cm_init_av_for_response(work
->port
, work
->mad_recv_wc
->wc
,
2111 work
->mad_recv_wc
->recv_buf
.grh
,
2115 cm_id_priv
->timewait_info
= cm_create_timewait_info(cm_id_priv
->
2117 if (IS_ERR(cm_id_priv
->timewait_info
)) {
2118 ret
= PTR_ERR(cm_id_priv
->timewait_info
);
2119 cm_id_priv
->timewait_info
= NULL
;
2122 cm_id_priv
->timewait_info
->work
.remote_id
= cm_id_priv
->id
.remote_id
;
2123 cm_id_priv
->timewait_info
->remote_ca_guid
=
2124 cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID
, req_msg
));
2125 cm_id_priv
->timewait_info
->remote_qpn
= cm_id_priv
->remote_qpn
;
2128 * Note that the ID pointer is not in the xarray at this point,
2129 * so this set is only visible to the local thread.
2131 cm_id_priv
->id
.state
= IB_CM_REQ_RCVD
;
2133 listen_cm_id_priv
= cm_match_req(work
, cm_id_priv
);
2134 if (!listen_cm_id_priv
) {
2135 trace_icm_no_listener_err(&cm_id_priv
->id
);
2136 cm_id_priv
->id
.state
= IB_CM_IDLE
;
2141 memset(&work
->path
[0], 0, sizeof(work
->path
[0]));
2142 if (cm_req_has_alt_path(req_msg
))
2143 memset(&work
->path
[1], 0, sizeof(work
->path
[1]));
2144 grh
= rdma_ah_read_grh(&cm_id_priv
->av
.ah_attr
);
2145 gid_attr
= grh
->sgid_attr
;
2147 if (cm_id_priv
->av
.ah_attr
.type
== RDMA_AH_ATTR_TYPE_ROCE
) {
2148 work
->path
[0].rec_type
=
2149 sa_conv_gid_to_pathrec_type(gid_attr
->gid_type
);
2151 cm_process_routed_req(req_msg
, work
->mad_recv_wc
->wc
);
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
;
3651 unsigned long flags
;
3654 lockdep_assert_held(&cm_id_priv
->lock
);
3656 if ((param
->info
&& param
->info_length
> IB_CM_SIDR_REP_INFO_LENGTH
) ||
3657 (param
->private_data
&&
3658 param
->private_data_len
> IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
))
3661 if (cm_id_priv
->id
.state
!= IB_CM_SIDR_REQ_RCVD
)
3664 ret
= cm_alloc_msg(cm_id_priv
, &msg
);
3668 cm_format_sidr_rep((struct cm_sidr_rep_msg
*) msg
->mad
, cm_id_priv
,
3670 trace_icm_send_sidr_rep(&cm_id_priv
->id
);
3671 ret
= ib_post_send_mad(msg
, NULL
);
3676 cm_id_priv
->id
.state
= IB_CM_IDLE
;
3677 spin_lock_irqsave(&cm
.lock
, flags
);
3678 if (!RB_EMPTY_NODE(&cm_id_priv
->sidr_id_node
)) {
3679 rb_erase(&cm_id_priv
->sidr_id_node
, &cm
.remote_sidr_table
);
3680 RB_CLEAR_NODE(&cm_id_priv
->sidr_id_node
);
3682 spin_unlock_irqrestore(&cm
.lock
, flags
);
3686 int ib_send_cm_sidr_rep(struct ib_cm_id
*cm_id
,
3687 struct ib_cm_sidr_rep_param
*param
)
3689 struct cm_id_private
*cm_id_priv
=
3690 container_of(cm_id
, struct cm_id_private
, id
);
3691 unsigned long flags
;
3694 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3695 ret
= cm_send_sidr_rep_locked(cm_id_priv
, param
);
3696 spin_unlock_irqrestore(&cm_id_priv
->lock
, flags
);
3699 EXPORT_SYMBOL(ib_send_cm_sidr_rep
);
3701 static void cm_format_sidr_rep_event(struct cm_work
*work
,
3702 const struct cm_id_private
*cm_id_priv
)
3704 struct cm_sidr_rep_msg
*sidr_rep_msg
;
3705 struct ib_cm_sidr_rep_event_param
*param
;
3707 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
3708 work
->mad_recv_wc
->recv_buf
.mad
;
3709 param
= &work
->cm_event
.param
.sidr_rep_rcvd
;
3710 param
->status
= IBA_GET(CM_SIDR_REP_STATUS
, sidr_rep_msg
);
3711 param
->qkey
= IBA_GET(CM_SIDR_REP_Q_KEY
, sidr_rep_msg
);
3712 param
->qpn
= IBA_GET(CM_SIDR_REP_QPN
, sidr_rep_msg
);
3713 param
->info
= IBA_GET_MEM_PTR(CM_SIDR_REP_ADDITIONAL_INFORMATION
,
3715 param
->info_len
= IBA_GET(CM_SIDR_REP_ADDITIONAL_INFORMATION_LENGTH
,
3717 param
->sgid_attr
= cm_id_priv
->av
.ah_attr
.grh
.sgid_attr
;
3718 work
->cm_event
.private_data
=
3719 IBA_GET_MEM_PTR(CM_SIDR_REP_PRIVATE_DATA
, sidr_rep_msg
);
3722 static int cm_sidr_rep_handler(struct cm_work
*work
)
3724 struct cm_sidr_rep_msg
*sidr_rep_msg
;
3725 struct cm_id_private
*cm_id_priv
;
3727 sidr_rep_msg
= (struct cm_sidr_rep_msg
*)
3728 work
->mad_recv_wc
->recv_buf
.mad
;
3729 cm_id_priv
= cm_acquire_id(
3730 cpu_to_be32(IBA_GET(CM_SIDR_REP_REQUESTID
, sidr_rep_msg
)), 0);
3732 return -EINVAL
; /* Unmatched reply. */
3734 spin_lock_irq(&cm_id_priv
->lock
);
3735 if (cm_id_priv
->id
.state
!= IB_CM_SIDR_REQ_SENT
) {
3736 spin_unlock_irq(&cm_id_priv
->lock
);
3739 cm_id_priv
->id
.state
= IB_CM_IDLE
;
3740 ib_cancel_mad(cm_id_priv
->av
.port
->mad_agent
, cm_id_priv
->msg
);
3741 spin_unlock_irq(&cm_id_priv
->lock
);
3743 cm_format_sidr_rep_event(work
, cm_id_priv
);
3744 cm_process_work(cm_id_priv
, work
);
3747 cm_deref_id(cm_id_priv
);
3751 static void cm_process_send_error(struct ib_mad_send_buf
*msg
,
3752 enum ib_wc_status wc_status
)
3754 struct cm_id_private
*cm_id_priv
;
3755 struct ib_cm_event cm_event
;
3756 enum ib_cm_state state
;
3759 memset(&cm_event
, 0, sizeof cm_event
);
3760 cm_id_priv
= msg
->context
[0];
3762 /* Discard old sends or ones without a response. */
3763 spin_lock_irq(&cm_id_priv
->lock
);
3764 state
= (enum ib_cm_state
) (unsigned long) msg
->context
[1];
3765 if (msg
!= cm_id_priv
->msg
|| state
!= cm_id_priv
->id
.state
)
3768 trace_icm_mad_send_err(state
, wc_status
);
3770 case IB_CM_REQ_SENT
:
3771 case IB_CM_MRA_REQ_RCVD
:
3772 cm_reset_to_idle(cm_id_priv
);
3773 cm_event
.event
= IB_CM_REQ_ERROR
;
3775 case IB_CM_REP_SENT
:
3776 case IB_CM_MRA_REP_RCVD
:
3777 cm_reset_to_idle(cm_id_priv
);
3778 cm_event
.event
= IB_CM_REP_ERROR
;
3780 case IB_CM_DREQ_SENT
:
3781 cm_enter_timewait(cm_id_priv
);
3782 cm_event
.event
= IB_CM_DREQ_ERROR
;
3784 case IB_CM_SIDR_REQ_SENT
:
3785 cm_id_priv
->id
.state
= IB_CM_IDLE
;
3786 cm_event
.event
= IB_CM_SIDR_REQ_ERROR
;
3791 spin_unlock_irq(&cm_id_priv
->lock
);
3792 cm_event
.param
.send_status
= wc_status
;
3794 /* No other events can occur on the cm_id at this point. */
3795 ret
= cm_id_priv
->id
.cm_handler(&cm_id_priv
->id
, &cm_event
);
3798 ib_destroy_cm_id(&cm_id_priv
->id
);
3801 spin_unlock_irq(&cm_id_priv
->lock
);
3805 static void cm_send_handler(struct ib_mad_agent
*mad_agent
,
3806 struct ib_mad_send_wc
*mad_send_wc
)
3808 struct ib_mad_send_buf
*msg
= mad_send_wc
->send_buf
;
3809 struct cm_port
*port
;
3812 port
= mad_agent
->context
;
3813 attr_index
= be16_to_cpu(((struct ib_mad_hdr
*)
3814 msg
->mad
)->attr_id
) - CM_ATTR_ID_OFFSET
;
3817 * If the send was in response to a received message (context[0] is not
3818 * set to a cm_id), and is not a REJ, then it is a send that was
3821 if (!msg
->context
[0] && (attr_index
!= CM_REJ_COUNTER
))
3824 atomic_long_add(1 + msg
->retries
,
3825 &port
->counter_group
[CM_XMIT
].counter
[attr_index
]);
3827 atomic_long_add(msg
->retries
,
3828 &port
->counter_group
[CM_XMIT_RETRIES
].
3829 counter
[attr_index
]);
3831 switch (mad_send_wc
->status
) {
3833 case IB_WC_WR_FLUSH_ERR
:
3837 if (msg
->context
[0] && msg
->context
[1])
3838 cm_process_send_error(msg
, mad_send_wc
->status
);
3845 static void cm_work_handler(struct work_struct
*_work
)
3847 struct cm_work
*work
= container_of(_work
, struct cm_work
, work
.work
);
3850 switch (work
->cm_event
.event
) {
3851 case IB_CM_REQ_RECEIVED
:
3852 ret
= cm_req_handler(work
);
3854 case IB_CM_MRA_RECEIVED
:
3855 ret
= cm_mra_handler(work
);
3857 case IB_CM_REJ_RECEIVED
:
3858 ret
= cm_rej_handler(work
);
3860 case IB_CM_REP_RECEIVED
:
3861 ret
= cm_rep_handler(work
);
3863 case IB_CM_RTU_RECEIVED
:
3864 ret
= cm_rtu_handler(work
);
3866 case IB_CM_USER_ESTABLISHED
:
3867 ret
= cm_establish_handler(work
);
3869 case IB_CM_DREQ_RECEIVED
:
3870 ret
= cm_dreq_handler(work
);
3872 case IB_CM_DREP_RECEIVED
:
3873 ret
= cm_drep_handler(work
);
3875 case IB_CM_SIDR_REQ_RECEIVED
:
3876 ret
= cm_sidr_req_handler(work
);
3878 case IB_CM_SIDR_REP_RECEIVED
:
3879 ret
= cm_sidr_rep_handler(work
);
3881 case IB_CM_LAP_RECEIVED
:
3882 ret
= cm_lap_handler(work
);
3884 case IB_CM_APR_RECEIVED
:
3885 ret
= cm_apr_handler(work
);
3887 case IB_CM_TIMEWAIT_EXIT
:
3888 ret
= cm_timewait_handler(work
);
3891 trace_icm_handler_err(work
->cm_event
.event
);
3899 static int cm_establish(struct ib_cm_id
*cm_id
)
3901 struct cm_id_private
*cm_id_priv
;
3902 struct cm_work
*work
;
3903 unsigned long flags
;
3905 struct cm_device
*cm_dev
;
3907 cm_dev
= ib_get_client_data(cm_id
->device
, &cm_client
);
3911 work
= kmalloc(sizeof *work
, GFP_ATOMIC
);
3915 cm_id_priv
= container_of(cm_id
, struct cm_id_private
, id
);
3916 spin_lock_irqsave(&cm_id_priv
->lock
, flags
);
3917 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 sysfs_emit(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 rdma_for_each_port (ib_device
, 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 rdma_for_each_port (ib_device
, 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
);
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
);