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Merge tag 'pm-6.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
[linux-block.git] / drivers / infiniband / core / cm.c
CommitLineData
24f52149 1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
a977049d 2/*
9af57b7a 3 * Copyright (c) 2004-2007 Intel Corporation. All rights reserved.
a977049d
HR		 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.
24f52149 7 * Copyright (c) 2019, Mellanox Technologies inc. All rights reserved.
a977049d 8 */
1b52fa98
SH		 9
10#include <linux/completion.h>
a977049d 11#include <linux/dma-mapping.h>
9af57b7a 12#include <linux/device.h>
e4dd23d7 13#include <linux/module.h>
a977049d
HR		 14#include <linux/err.h>
15#include <linux/idr.h>
16#include <linux/interrupt.h>
f06d2653 17#include <linux/random.h>
a977049d
HR		 18#include <linux/rbtree.h>
19#include <linux/spinlock.h>
5a0e3ad6 20#include <linux/slab.h>
9af57b7a 21#include <linux/sysfs.h>
a977049d 22#include <linux/workqueue.h>
110cf374 23#include <linux/kdev_t.h>
dd5f03be 24#include <linux/etherdevice.h>
a977049d 25
a4d61e84
RD		 26#include <rdma/ib_cache.h>
27#include <rdma/ib_cm.h>
526a12c8 28#include <rdma/ib_sysfs.h>
a977049d 29#include "cm_msgs.h"
c87e65cf 30#include "core_priv.h"
75874b3d 31#include "cm_trace.h"
a977049d
HR		 32
33MODULE_AUTHOR("Sean Hefty");
34MODULE_DESCRIPTION("InfiniBand CM");
35MODULE_LICENSE("Dual BSD/GPL");
36
96d9cbe2 37#define CM_DESTROY_ID_WAIT_TIMEOUT 10000 /* msecs */
04924587 38#define CM_DIRECT_RETRY_CTX ((void *) 1UL)
45611fe8 39#define CM_MRA_SETTING 24 /* 4.096us * 2^24 = ~68.7 seconds */
04924587 40
77a5db13
SW		 41static const char * const ibcm_rej_reason_strs[] = {
42 [IB_CM_REJ_NO_QP] = "no QP",
43 [IB_CM_REJ_NO_EEC] = "no EEC",
44 [IB_CM_REJ_NO_RESOURCES] = "no resources",
45 [IB_CM_REJ_TIMEOUT] = "timeout",
46 [IB_CM_REJ_UNSUPPORTED] = "unsupported",
47 [IB_CM_REJ_INVALID_COMM_ID] = "invalid comm ID",
48 [IB_CM_REJ_INVALID_COMM_INSTANCE] = "invalid comm instance",
49 [IB_CM_REJ_INVALID_SERVICE_ID] = "invalid service ID",
50 [IB_CM_REJ_INVALID_TRANSPORT_TYPE] = "invalid transport type",
51 [IB_CM_REJ_STALE_CONN] = "stale conn",
52 [IB_CM_REJ_RDC_NOT_EXIST] = "RDC not exist",
53 [IB_CM_REJ_INVALID_GID] = "invalid GID",
54 [IB_CM_REJ_INVALID_LID] = "invalid LID",
55 [IB_CM_REJ_INVALID_SL] = "invalid SL",
56 [IB_CM_REJ_INVALID_TRAFFIC_CLASS] = "invalid traffic class",
57 [IB_CM_REJ_INVALID_HOP_LIMIT] = "invalid hop limit",
58 [IB_CM_REJ_INVALID_PACKET_RATE] = "invalid packet rate",
59 [IB_CM_REJ_INVALID_ALT_GID] = "invalid alt GID",
60 [IB_CM_REJ_INVALID_ALT_LID] = "invalid alt LID",
61 [IB_CM_REJ_INVALID_ALT_SL] = "invalid alt SL",
62 [IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS] = "invalid alt traffic class",
63 [IB_CM_REJ_INVALID_ALT_HOP_LIMIT] = "invalid alt hop limit",
64 [IB_CM_REJ_INVALID_ALT_PACKET_RATE] = "invalid alt packet rate",
65 [IB_CM_REJ_PORT_CM_REDIRECT] = "port CM redirect",
66 [IB_CM_REJ_PORT_REDIRECT] = "port redirect",
67 [IB_CM_REJ_INVALID_MTU] = "invalid MTU",
68 [IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES] = "insufficient resp resources",
69 [IB_CM_REJ_CONSUMER_DEFINED] = "consumer defined",
70 [IB_CM_REJ_INVALID_RNR_RETRY] = "invalid RNR retry",
71 [IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID] = "duplicate local comm ID",
72 [IB_CM_REJ_INVALID_CLASS_VERSION] = "invalid class version",
73 [IB_CM_REJ_INVALID_FLOW_LABEL] = "invalid flow label",
74 [IB_CM_REJ_INVALID_ALT_FLOW_LABEL] = "invalid alt flow label",
a20652e1
LR		 75 [IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED] =
76 "vendor option is not supported",
77a5db13
SW		 77};
78
79const char *__attribute_const__ ibcm_reject_msg(int reason)
80{
81 size_t index = reason;
82
83 if (index < ARRAY_SIZE(ibcm_rej_reason_strs) &&
84 ibcm_rej_reason_strs[index])
85 return ibcm_rej_reason_strs[index];
86 else
87 return "unrecognized reason";
88}
89EXPORT_SYMBOL(ibcm_reject_msg);
90
e029fdc0 91struct cm_id_private;
e83f195a 92struct cm_work;
11a0ae4c 93static int cm_add_one(struct ib_device *device);
7c1eb45a 94static void cm_remove_one(struct ib_device *device, void *client_data);
e83f195a
JG		 95static void cm_process_work(struct cm_id_private *cm_id_priv,
96 struct cm_work *work);
6a8824a7
JG		 97static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv,
98 struct ib_cm_sidr_rep_param *param);
fc0856c3 99static void cm_issue_dreq(struct cm_id_private *cm_id_priv);
87cabf3e
JG		 100static int cm_send_drep_locked(struct cm_id_private *cm_id_priv,
101 void *private_data, u8 private_data_len);
81ddb41f
JG		 102static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
103 enum ib_cm_rej_reason reason, void *ari,
104 u8 ari_length, const void *private_data,
105 u8 private_data_len);
a977049d
HR		 106
107static struct ib_client cm_client = {
108 .name = "cm",
109 .add = cm_add_one,
110 .remove = cm_remove_one
111};
112
113static struct ib_cm {
114 spinlock_t lock;
115 struct list_head device_list;
116 rwlock_t device_lock;
117 struct rb_root listen_service_table;
118 u64 listen_service_id;
119 /* struct rb_root peer_service_table; todo: fix peer to peer */
120 struct rb_root remote_qp_table;
121 struct rb_root remote_id_table;
122 struct rb_root remote_sidr_table;
ae78ff3a
MW		 123 struct xarray local_id_table;
124 u32 local_id_next;
f06d2653 125 __be32 random_id_operand;
8575329d 126 struct list_head timewait_list;
a977049d
HR		 127 struct workqueue_struct *wq;
128} cm;
129
9af57b7a
SH		 130/* Counter indexes ordered by attribute ID */
131enum {
132 CM_REQ_COUNTER,
133 CM_MRA_COUNTER,
134 CM_REJ_COUNTER,
135 CM_REP_COUNTER,
136 CM_RTU_COUNTER,
137 CM_DREQ_COUNTER,
138 CM_DREP_COUNTER,
139 CM_SIDR_REQ_COUNTER,
140 CM_SIDR_REP_COUNTER,
141 CM_LAP_COUNTER,
142 CM_APR_COUNTER,
143 CM_ATTR_COUNT,
144 CM_ATTR_ID_OFFSET = 0x0010,
145};
146
147enum {
148 CM_XMIT,
149 CM_XMIT_RETRIES,
150 CM_RECV,
151 CM_RECV_DUPLICATES,
152 CM_COUNTER_GROUPS
153};
154
9af57b7a 155struct cm_counter_attribute {
526a12c8
JG		 156 struct ib_port_attribute attr;
157 unsigned short group;
158 unsigned short index;
9af57b7a
SH		 159};
160
a977049d
HR		 161struct cm_port {
162 struct cm_device *cm_dev;
163 struct ib_mad_agent *mad_agent;
1fb7f897 164 u32 port_num;
526a12c8 165 atomic_long_t counters[CM_COUNTER_GROUPS][CM_ATTR_COUNT];
a977049d
HR		 166};
167
168struct cm_device {
76039ac9 169 struct kref kref;
a977049d 170 struct list_head list;
4dab26be 171 rwlock_t mad_agent_lock;
d4c4196f 172 struct ib_device *ib_device;
1d846126 173 u8 ack_delay;
be4b4993 174 int going_down;
5b361328 175 struct cm_port *port[];
a977049d
HR		 176};
177
178struct cm_av {
179 struct cm_port *port;
90898850 180 struct rdma_ah_attr ah_attr;
eb8336db 181 u16 dlid_datapath;
a977049d 182 u16 pkey_index;
1d846126 183 u8 timeout;
a977049d
HR		 184};
185
186struct cm_work {
c4028958 187 struct delayed_work work;
a977049d
HR		 188 struct list_head list;
189 struct cm_port *port;
190 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
97f52eb4
SH		 191 __be32 local_id; /* Established / timewait */
192 __be32 remote_id;
a977049d 193 struct ib_cm_event cm_event;
5b361328 194 struct sa_path_rec path[];
a977049d
HR		 195};
196
197struct cm_timewait_info {
909624d8 198 struct cm_work work;
8575329d 199 struct list_head list;
a977049d
HR		 200 struct rb_node remote_qp_node;
201 struct rb_node remote_id_node;
97f52eb4
SH		 202 __be64 remote_ca_guid;
203 __be32 remote_qpn;
a977049d
HR		 204 u8 inserted_remote_qp;
205 u8 inserted_remote_id;
206};
207
208struct cm_id_private {
209 struct ib_cm_id id;
210
211 struct rb_node service_node;
212 struct rb_node sidr_id_node;
bf0480a2 213 u32 sidr_slid;
87fd1a11 214 spinlock_t lock; /* Do not acquire inside cm.lock */
1b52fa98 215 struct completion comp;
0acc637d 216 refcount_t refcount;
067b171b 217 /* Number of clients sharing this ib_cm_id. Only valid for listeners.
26caea5f
WL		 218 * Protected by the cm.lock spinlock.
219 */
067b171b 220 int listen_sharecount;
4d6e8a03 221 struct rcu_head rcu;
a977049d
HR		 222
223 struct ib_mad_send_buf *msg;
224 struct cm_timewait_info *timewait_info;
225 /* todo: use alternate port on send failure */
226 struct cm_av av;
227 struct cm_av alt_av;
228
229 void *private_data;
97f52eb4
SH		 230 __be64 tid;
231 __be32 local_qpn;
232 __be32 remote_qpn;
ae7971a7 233 enum ib_qp_type qp_type;
97f52eb4
SH		 234 __be32 sq_psn;
235 __be32 rq_psn;
a977049d
HR		 236 int timeout_ms;
237 enum ib_mtu path_mtu;
e1444b5a 238 __be16 pkey;
a977049d
HR		 239 u8 private_data_len;
240 u8 max_cm_retries;
a977049d
HR		 241 u8 responder_resources;
242 u8 initiator_depth;
a977049d
HR		 243 u8 retry_count;
244 u8 rnr_retry_count;
1d846126 245 u8 target_ack_delay;
a977049d
HR		 246
247 struct list_head work_list;
248 atomic_t work_count;
a20652e1
LR		 249
250 struct rdma_ucm_ece ece;
a977049d
HR		 251};
252
76039ac9
MZ		 253static void cm_dev_release(struct kref *kref)
254{
255 struct cm_device *cm_dev = container_of(kref, struct cm_device, kref);
256 u32 i;
257
258 rdma_for_each_port(cm_dev->ib_device, i)
259 kfree(cm_dev->port[i - 1]);
260
261 kfree(cm_dev);
262}
263
264static void cm_device_put(struct cm_device *cm_dev)
265{
266 kref_put(&cm_dev->kref, cm_dev_release);
267}
268
c4028958 269static void cm_work_handler(struct work_struct *work);
a977049d
HR		 270
271static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
272{
0acc637d 273 if (refcount_dec_and_test(&cm_id_priv->refcount))
1b52fa98 274 complete(&cm_id_priv->comp);
a977049d
HR		 275}
276
4b4e586e 277static struct ib_mad_send_buf *cm_alloc_msg(struct cm_id_private *cm_id_priv)
a977049d
HR		 278{
279 struct ib_mad_agent *mad_agent;
280 struct ib_mad_send_buf *m;
281 struct ib_ah *ah;
282
76039ac9
MZ		 283 lockdep_assert_held(&cm_id_priv->lock);
284
285 if (!cm_id_priv->av.port)
286 return ERR_PTR(-EINVAL);
287
4dab26be 288 read_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
a977049d 289 mad_agent = cm_id_priv->av.port->mad_agent;
76039ac9
MZ		 290 if (!mad_agent) {
291 m = ERR_PTR(-EINVAL);
292 goto out;
293 }
294
3595c398 295 ah = rdma_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr, 0);
76039ac9
MZ		 296 if (IS_ERR(ah)) {
297 m = ERR_CAST(ah);
298 goto out;
299 }
a977049d 300
3cd96564 301 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
3595c398 302 cm_id_priv->av.pkey_index,
34816ad9 303 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
da2dfaa3
IW		 304 GFP_ATOMIC,
305 IB_MGMT_BASE_VERSION);
a977049d 306 if (IS_ERR(m)) {
2553ba21 307 rdma_destroy_ah(ah, 0);
76039ac9 308 goto out;
a977049d
HR		 309 }
310
34816ad9 311 m->ah = ah;
76039ac9
MZ		 312
313out:
4dab26be 314 read_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
4b4e586e 315 return m;
4b4e586e
JG		 316}
317
efafae67
JG		 318static void cm_free_msg(struct ib_mad_send_buf *msg)
319{
efafae67
JG		 320 if (msg->ah)
321 rdma_destroy_ah(msg->ah, 0);
efafae67
JG		 322 ib_free_send_mad(msg);
323}
324
4b4e586e 325static struct ib_mad_send_buf *
1e515921 326cm_alloc_priv_msg(struct cm_id_private *cm_id_priv, enum ib_cm_state state)
4b4e586e
JG		 327{
328 struct ib_mad_send_buf *msg;
329
330 lockdep_assert_held(&cm_id_priv->lock);
331
332 msg = cm_alloc_msg(cm_id_priv);
333 if (IS_ERR(msg))
334 return msg;
1e515921 335
4b4e586e 336 cm_id_priv->msg = msg;
1e515921
SH		 337 refcount_inc(&cm_id_priv->refcount);
338 msg->context[0] = cm_id_priv;
339 msg->context[1] = (void *) (unsigned long) state;
340
341 msg->retries = cm_id_priv->max_cm_retries;
342 msg->timeout_ms = cm_id_priv->timeout_ms;
343
4b4e586e
JG		 344 return msg;
345}
346
347static void cm_free_priv_msg(struct ib_mad_send_buf *msg)
348{
349 struct cm_id_private *cm_id_priv = msg->context[0];
350
351 lockdep_assert_held(&cm_id_priv->lock);
352
353 if (!WARN_ON(cm_id_priv->msg != msg))
354 cm_id_priv->msg = NULL;
355
356 if (msg->ah)
357 rdma_destroy_ah(msg->ah, 0);
358 cm_deref_id(cm_id_priv);
359 ib_free_send_mad(msg);
a977049d
HR		 360}
361
04924587
SH		 362static struct ib_mad_send_buf *
363cm_alloc_response_msg_no_ah(struct cm_port *port,
364 struct ib_mad_recv_wc *mad_recv_wc,
365 bool direct_retry)
c7616118 366{
04924587
SH		 367 struct ib_mad_send_buf *m;
368
369 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
370 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
371 GFP_ATOMIC, IB_MGMT_BASE_VERSION);
372 if (!IS_ERR(m))
373 m->context[0] = direct_retry ? CM_DIRECT_RETRY_CTX : NULL;
374
375 return m;
c7616118
RD		 376}
377
378static int cm_create_response_msg_ah(struct cm_port *port,
379 struct ib_mad_recv_wc *mad_recv_wc,
380 struct ib_mad_send_buf *msg)
a977049d 381{
a977049d
HR		 382 struct ib_ah *ah;
383
384 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
385 mad_recv_wc->recv_buf.grh, port->port_num);
386 if (IS_ERR(ah))
387 return PTR_ERR(ah);
388
c7616118 389 msg->ah = ah;
a977049d
HR		 390 return 0;
391}
392
c7616118
RD		 393static int cm_alloc_response_msg(struct cm_port *port,
394 struct ib_mad_recv_wc *mad_recv_wc,
04924587 395 bool direct_retry,
c7616118
RD		 396 struct ib_mad_send_buf **msg)
397{
398 struct ib_mad_send_buf *m;
399 int ret;
400
04924587 401 m = cm_alloc_response_msg_no_ah(port, mad_recv_wc, direct_retry);
c7616118
RD		 402 if (IS_ERR(m))
403 return PTR_ERR(m);
404
405 ret = cm_create_response_msg_ah(port, mad_recv_wc, m);
406 if (ret) {
96376a40 407 ib_free_send_mad(m);
c7616118
RD		 408 return ret;
409 }
410
411 *msg = m;
412 return 0;
413}
414
f681967a 415static void *cm_copy_private_data(const void *private_data, u8 private_data_len)
a977049d
HR		 416{
417 void *data;
418
419 if (!private_data || !private_data_len)
420 return NULL;
421
bed8bdfd 422 data = kmemdup(private_data, private_data_len, GFP_KERNEL);
a977049d
HR		 423 if (!data)
424 return ERR_PTR(-ENOMEM);
425
a977049d
HR		 426 return data;
427}
428
429static void cm_set_private_data(struct cm_id_private *cm_id_priv,
430 void *private_data, u8 private_data_len)
431{
432 if (cm_id_priv->private_data && cm_id_priv->private_data_len)
433 kfree(cm_id_priv->private_data);
434
435 cm_id_priv->private_data = private_data;
436 cm_id_priv->private_data_len = private_data_len;
437}
438
76039ac9
MZ		 439static void cm_set_av_port(struct cm_av *av, struct cm_port *port)
440{
441 struct cm_port *old_port = av->port;
442
443 if (old_port == port)
444 return;
445
446 av->port = port;
447 if (old_port)
448 cm_device_put(old_port->cm_dev);
449 if (port)
450 kref_get(&port->cm_dev->kref);
451}
452
7345201c
MZ		 453static void cm_init_av_for_lap(struct cm_port *port, struct ib_wc *wc,
454 struct rdma_ah_attr *ah_attr, struct cm_av *av)
0e225dcb 455{
76039ac9 456 cm_set_av_port(av, port);
0e225dcb 457 av->pkey_index = wc->pkey_index;
7345201c 458 rdma_move_ah_attr(&av->ah_attr, ah_attr);
0e225dcb
PP		 459}
460
0c4386ec
PP		 461static int cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
462 struct ib_grh *grh, struct cm_av *av)
a977049d 463{
76039ac9 464 cm_set_av_port(av, port);
a977049d 465 av->pkey_index = wc->pkey_index;
f6bdb142
PP		 466 return ib_init_ah_attr_from_wc(port->cm_dev->ib_device,
467 port->port_num, wc,
468 grh, &av->ah_attr);
a977049d
HR		 469}
470
39839107
PP		 471static struct cm_port *
472get_cm_port_from_path(struct sa_path_rec *path, const struct ib_gid_attr *attr)
a977049d
HR		 473{
474 struct cm_device *cm_dev;
475 struct cm_port *port = NULL;
476 unsigned long flags;
39839107
PP		 477
478 if (attr) {
479 read_lock_irqsave(&cm.device_lock, flags);
480 list_for_each_entry(cm_dev, &cm.device_list, list) {
481 if (cm_dev->ib_device == attr->device) {
482 port = cm_dev->port[attr->port_num - 1];
483 break;
484 }
485 }
486 read_unlock_irqrestore(&cm.device_lock, flags);
487 } else {
488 /* SGID attribute can be NULL in following
489 * conditions.
490 * (a) Alternative path
491 * (b) IB link layer without GRH
492 * (c) LAP send messages
493 */
494 read_lock_irqsave(&cm.device_lock, flags);
495 list_for_each_entry(cm_dev, &cm.device_list, list) {
496 attr = rdma_find_gid(cm_dev->ib_device,
497 &path->sgid,
498 sa_conv_pathrec_to_gid_type(path),
499 NULL);
500 if (!IS_ERR(attr)) {
501 port = cm_dev->port[attr->port_num - 1];
502 break;
503 }
a977049d 504 }
39839107
PP		 505 read_unlock_irqrestore(&cm.device_lock, flags);
506 if (port)
507 rdma_put_gid_attr(attr);
a977049d 508 }
cb12a8e2
PP		 509 return port;
510}
511
39839107
PP		 512static int cm_init_av_by_path(struct sa_path_rec *path,
513 const struct ib_gid_attr *sgid_attr,
3595c398 514 struct cm_av *av)
cb12a8e2 515{
e822ff21 516 struct rdma_ah_attr new_ah_attr;
cb12a8e2
PP		 517 struct cm_device *cm_dev;
518 struct cm_port *port;
519 int ret;
c2c6ff13 520
39839107 521 port = get_cm_port_from_path(path, sgid_attr);
a977049d
HR		 522 if (!port)
523 return -EINVAL;
cb12a8e2 524 cm_dev = port->cm_dev;
a977049d 525
d4c4196f 526 ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num,
a977049d
HR		 527 be16_to_cpu(path->pkey), &av->pkey_index);
528 if (ret)
529 return ret;
530
76039ac9 531 cm_set_av_port(av, port);
e822ff21
PP		 532
533 /*
534 * av->ah_attr might be initialized based on wc or during
aa74f487
PP		 535 * request processing time which might have reference to sgid_attr.
536 * So initialize a new ah_attr on stack.
e822ff21
PP		 537 * If initialization fails, old ah_attr is used for sending any
538 * responses. If initialization is successful, than new ah_attr
aa74f487
PP		 539 * is used by overwriting the old one. So that right ah_attr
540 * can be used to return an error response.
e822ff21 541 */
4ad6a024 542 ret = ib_init_ah_attr_from_path(cm_dev->ib_device, port->port_num, path,
39839107 543 &new_ah_attr, sgid_attr);
5cf3968a
PP		 544 if (ret)
545 return ret;
546
1d846126 547 av->timeout = path->packet_life_time + 1;
d97099fe 548 rdma_move_ah_attr(&av->ah_attr, &new_ah_attr);
e822ff21 549 return 0;
a977049d
HR		 550}
551
7345201c
MZ		 552/* Move av created by cm_init_av_by_path(), so av.dgid is not moved */
553static void cm_move_av_from_path(struct cm_av *dest, struct cm_av *src)
554{
76039ac9
MZ		 555 cm_set_av_port(dest, src->port);
556 cm_set_av_port(src, NULL);
7345201c
MZ		 557 dest->pkey_index = src->pkey_index;
558 rdma_move_ah_attr(&dest->ah_attr, &src->ah_attr);
559 dest->timeout = src->timeout;
560}
561
562static void cm_destroy_av(struct cm_av *av)
563{
564 rdma_destroy_ah_attr(&av->ah_attr);
76039ac9 565 cm_set_av_port(av, NULL);
7345201c
MZ		 566}
567
ae78ff3a
MW		 568static u32 cm_local_id(__be32 local_id)
569{
570 return (__force u32) (local_id ^ cm.random_id_operand);
a977049d
HR		 571}
572
4d6e8a03 573static struct cm_id_private *cm_acquire_id(__be32 local_id, __be32 remote_id)
a977049d
HR		 574{
575 struct cm_id_private *cm_id_priv;
576
4d6e8a03 577 rcu_read_lock();
ae78ff3a 578 cm_id_priv = xa_load(&cm.local_id_table, cm_local_id(local_id));
4d6e8a03
DG		 579 if (!cm_id_priv || cm_id_priv->id.remote_id != remote_id ||
580 !refcount_inc_not_zero(&cm_id_priv->refcount))
581 cm_id_priv = NULL;
582 rcu_read_unlock();
a977049d
HR		 583
584 return cm_id_priv;
585}
586
a88f4888
RD		 587/*
588 * Trivial helpers to strip endian annotation and compare; the
589 * endianness doesn't actually matter since we just need a stable
590 * order for the RB tree.
591 */
592static int be32_lt(__be32 a, __be32 b)
593{
594 return (__force u32) a < (__force u32) b;
595}
596
597static int be32_gt(__be32 a, __be32 b)
598{
599 return (__force u32) a > (__force u32) b;
600}
601
602static int be64_lt(__be64 a, __be64 b)
603{
604 return (__force u64) a < (__force u64) b;
605}
606
607static int be64_gt(__be64 a, __be64 b)
608{
609 return (__force u64) a > (__force u64) b;
610}
611
98f67156
JG		 612/*
613 * Inserts a new cm_id_priv into the listen_service_table. Returns cm_id_priv
614 * if the new ID was inserted, NULL if it could not be inserted due to a
615 * collision, or the existing cm_id_priv ready for shared usage.
616 */
617static struct cm_id_private *cm_insert_listen(struct cm_id_private *cm_id_priv,
618 ib_cm_handler shared_handler)
a977049d
HR		 619{
620 struct rb_node **link = &cm.listen_service_table.rb_node;
621 struct rb_node *parent = NULL;
622 struct cm_id_private *cur_cm_id_priv;
97f52eb4 623 __be64 service_id = cm_id_priv->id.service_id;
98f67156 624 unsigned long flags;
a977049d 625
98f67156 626 spin_lock_irqsave(&cm.lock, flags);
a977049d
HR		 627 while (*link) {
628 parent = *link;
629 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
630 service_node);
637ff8ea
MZ		 631
632 if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
633 link = &(*link)->rb_left;
634 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
635 link = &(*link)->rb_right;
636 else if (be64_lt(service_id, cur_cm_id_priv->id.service_id))
637 link = &(*link)->rb_left;
638 else if (be64_gt(service_id, cur_cm_id_priv->id.service_id))
639 link = &(*link)->rb_right;
640 else {
98f67156
JG		 641 /*
642 * Sharing an ib_cm_id with different handlers is not
643 * supported
644 */
645 if (cur_cm_id_priv->id.cm_handler != shared_handler ||
646 cur_cm_id_priv->id.context ||
647 WARN_ON(!cur_cm_id_priv->id.cm_handler)) {
648 spin_unlock_irqrestore(&cm.lock, flags);
649 return NULL;
650 }
651 refcount_inc(&cur_cm_id_priv->refcount);
652 cur_cm_id_priv->listen_sharecount++;
653 spin_unlock_irqrestore(&cm.lock, flags);
07d357d0 654 return cur_cm_id_priv;
98f67156 655 }
a977049d 656 }
98f67156 657 cm_id_priv->listen_sharecount++;
a977049d
HR		 658 rb_link_node(&cm_id_priv->service_node, parent, link);
659 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
98f67156
JG		 660 spin_unlock_irqrestore(&cm.lock, flags);
661 return cm_id_priv;
a977049d
HR		 662}
663
f681967a
WL		 664static struct cm_id_private *cm_find_listen(struct ib_device *device,
665 __be64 service_id)
a977049d
HR		 666{
667 struct rb_node *node = cm.listen_service_table.rb_node;
668 struct cm_id_private *cm_id_priv;
669
670 while (node) {
671 cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
637ff8ea 672
07d357d0
SH		 673 if (device < cm_id_priv->id.device)
674 node = node->rb_left;
675 else if (device > cm_id_priv->id.device)
676 node = node->rb_right;
a88f4888 677 else if (be64_lt(service_id, cm_id_priv->id.service_id))
a977049d 678 node = node->rb_left;
a88f4888 679 else if (be64_gt(service_id, cm_id_priv->id.service_id))
6e61d04f 680 node = node->rb_right;
637ff8ea
MZ		 681 else {
682 refcount_inc(&cm_id_priv->refcount);
683 return cm_id_priv;
684 }
a977049d
HR		 685 }
686 return NULL;
687}
688
f681967a
WL		 689static struct cm_timewait_info *
690cm_insert_remote_id(struct cm_timewait_info *timewait_info)
a977049d
HR		 691{
692 struct rb_node **link = &cm.remote_id_table.rb_node;
693 struct rb_node *parent = NULL;
694 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 695 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
696 __be32 remote_id = timewait_info->work.remote_id;
a977049d
HR		 697
698 while (*link) {
699 parent = *link;
700 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
701 remote_id_node);
a88f4888 702 if (be32_lt(remote_id, cur_timewait_info->work.remote_id))
a977049d 703 link = &(*link)->rb_left;
a88f4888 704 else if (be32_gt(remote_id, cur_timewait_info->work.remote_id))
a977049d 705 link = &(*link)->rb_right;
a88f4888 706 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d 707 link = &(*link)->rb_left;
a88f4888 708 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d
HR		 709 link = &(*link)->rb_right;
710 else
711 return cur_timewait_info;
712 }
713 timewait_info->inserted_remote_id = 1;
714 rb_link_node(&timewait_info->remote_id_node, parent, link);
715 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
716 return NULL;
717}
718
cfa68b0d
JG		 719static struct cm_id_private *cm_find_remote_id(__be64 remote_ca_guid,
720 __be32 remote_id)
a977049d
HR		 721{
722 struct rb_node *node = cm.remote_id_table.rb_node;
723 struct cm_timewait_info *timewait_info;
cfa68b0d 724 struct cm_id_private *res = NULL;
a977049d 725
cfa68b0d 726 spin_lock_irq(&cm.lock);
a977049d
HR		 727 while (node) {
728 timewait_info = rb_entry(node, struct cm_timewait_info,
729 remote_id_node);
a88f4888 730 if (be32_lt(remote_id, timewait_info->work.remote_id))
a977049d 731 node = node->rb_left;
a88f4888 732 else if (be32_gt(remote_id, timewait_info->work.remote_id))
a977049d 733 node = node->rb_right;
a88f4888 734 else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid))
a977049d 735 node = node->rb_left;
a88f4888 736 else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid))
a977049d 737 node = node->rb_right;
cfa68b0d
JG		 738 else {
739 res = cm_acquire_id(timewait_info->work.local_id,
740 timewait_info->work.remote_id);
741 break;
742 }
a977049d 743 }
cfa68b0d
JG		 744 spin_unlock_irq(&cm.lock);
745 return res;
a977049d
HR		 746}
747
f681967a
WL		 748static struct cm_timewait_info *
749cm_insert_remote_qpn(struct cm_timewait_info *timewait_info)
a977049d
HR		 750{
751 struct rb_node **link = &cm.remote_qp_table.rb_node;
752 struct rb_node *parent = NULL;
753 struct cm_timewait_info *cur_timewait_info;
97f52eb4
SH		 754 __be64 remote_ca_guid = timewait_info->remote_ca_guid;
755 __be32 remote_qpn = timewait_info->remote_qpn;
a977049d
HR		 756
757 while (*link) {
758 parent = *link;
759 cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
760 remote_qp_node);
a88f4888 761 if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn))
a977049d 762 link = &(*link)->rb_left;
a88f4888 763 else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn))
a977049d 764 link = &(*link)->rb_right;
a88f4888 765 else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d 766 link = &(*link)->rb_left;
a88f4888 767 else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
a977049d
HR		 768 link = &(*link)->rb_right;
769 else
770 return cur_timewait_info;
771 }
772 timewait_info->inserted_remote_qp = 1;
773 rb_link_node(&timewait_info->remote_qp_node, parent, link);
774 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
775 return NULL;
776}
777
f681967a
WL		 778static struct cm_id_private *
779cm_insert_remote_sidr(struct cm_id_private *cm_id_priv)
a977049d
HR		 780{
781 struct rb_node **link = &cm.remote_sidr_table.rb_node;
782 struct rb_node *parent = NULL;
783 struct cm_id_private *cur_cm_id_priv;
97f52eb4 784 __be32 remote_id = cm_id_priv->id.remote_id;
a977049d
HR		 785
786 while (*link) {
787 parent = *link;
788 cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
789 sidr_id_node);
a88f4888 790 if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id))
a977049d 791 link = &(*link)->rb_left;
a88f4888 792 else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id))
a977049d
HR		 793 link = &(*link)->rb_right;
794 else {
bf0480a2 795 if (cur_cm_id_priv->sidr_slid < cm_id_priv->sidr_slid)
a977049d 796 link = &(*link)->rb_left;
bf0480a2 797 else if (cur_cm_id_priv->sidr_slid > cm_id_priv->sidr_slid)
a977049d
HR		 798 link = &(*link)->rb_right;
799 else
800 return cur_cm_id_priv;
801 }
802 }
803 rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
804 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
805 return NULL;
806}
807
98f67156
JG		 808static struct cm_id_private *cm_alloc_id_priv(struct ib_device *device,
809 ib_cm_handler cm_handler,
810 void *context)
a977049d
HR		 811{
812 struct cm_id_private *cm_id_priv;
e8dc4e88 813 u32 id;
a977049d
HR		 814 int ret;
815
de6eb66b 816 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
a977049d
HR		 817 if (!cm_id_priv)
818 return ERR_PTR(-ENOMEM);
819
a977049d 820 cm_id_priv->id.state = IB_CM_IDLE;
07d357d0 821 cm_id_priv->id.device = device;
a977049d
HR		 822 cm_id_priv->id.cm_handler = cm_handler;
823 cm_id_priv->id.context = context;
354ba39c 824 cm_id_priv->id.remote_cm_qpn = 1;
a977049d 825
2305d686
JG		 826 RB_CLEAR_NODE(&cm_id_priv->service_node);
827 RB_CLEAR_NODE(&cm_id_priv->sidr_id_node);
a977049d 828 spin_lock_init(&cm_id_priv->lock);
1b52fa98 829 init_completion(&cm_id_priv->comp);
a977049d
HR		 830 INIT_LIST_HEAD(&cm_id_priv->work_list);
831 atomic_set(&cm_id_priv->work_count, -1);
0acc637d 832 refcount_set(&cm_id_priv->refcount, 1);
e8dc4e88 833
eb73060b
JG		 834 ret = xa_alloc_cyclic(&cm.local_id_table, &id, NULL, xa_limit_32b,
835 &cm.local_id_next, GFP_KERNEL);
98365351 836 if (ret < 0)
e8dc4e88
JG		 837 goto error;
838 cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand;
e8dc4e88 839
98f67156 840 return cm_id_priv;
a977049d
HR		 841
842error:
843 kfree(cm_id_priv);
e8dc4e88 844 return ERR_PTR(ret);
a977049d 845}
98f67156
JG		 846
847/*
848 * Make the ID visible to the MAD handlers and other threads that use the
849 * xarray.
850 */
851static void cm_finalize_id(struct cm_id_private *cm_id_priv)
852{
eb73060b
JG		 853 xa_store(&cm.local_id_table, cm_local_id(cm_id_priv->id.local_id),
854 cm_id_priv, GFP_ATOMIC);
98f67156
JG		 855}
856
857struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
858 ib_cm_handler cm_handler,
859 void *context)
860{
861 struct cm_id_private *cm_id_priv;
862
863 cm_id_priv = cm_alloc_id_priv(device, cm_handler, context);
864 if (IS_ERR(cm_id_priv))
865 return ERR_CAST(cm_id_priv);
866
867 cm_finalize_id(cm_id_priv);
868 return &cm_id_priv->id;
869}
a977049d
HR		 870EXPORT_SYMBOL(ib_create_cm_id);
871
f681967a 872static struct cm_work *cm_dequeue_work(struct cm_id_private *cm_id_priv)
a977049d
HR		 873{
874 struct cm_work *work;
875
876 if (list_empty(&cm_id_priv->work_list))
877 return NULL;
878
879 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
880 list_del(&work->list);
881 return work;
882}
883
884static void cm_free_work(struct cm_work *work)
885{
886 if (work->mad_recv_wc)
887 ib_free_recv_mad(work->mad_recv_wc);
888 kfree(work);
889}
890
e83f195a
JG		 891static void cm_queue_work_unlock(struct cm_id_private *cm_id_priv,
892 struct cm_work *work)
1ea7c546 893 __releases(&cm_id_priv->lock)
e83f195a
JG		 894{
895 bool immediate;
896
897 /*
898 * To deliver the event to the user callback we have the drop the
899 * spinlock, however, we need to ensure that the user callback is single
900 * threaded and receives events in the temporal order. If there are
901 * already events being processed then thread new events onto a list,
902 * the thread currently processing will pick them up.
903 */
904 immediate = atomic_inc_and_test(&cm_id_priv->work_count);
905 if (!immediate) {
906 list_add_tail(&work->list, &cm_id_priv->work_list);
907 /*
908 * This routine always consumes incoming reference. Once queued
909 * to the work_list then a reference is held by the thread
910 * currently running cm_process_work() and this reference is not
911 * needed.
912 */
913 cm_deref_id(cm_id_priv);
914 }
915 spin_unlock_irq(&cm_id_priv->lock);
916
917 if (immediate)
918 cm_process_work(cm_id_priv, work);
919}
920
a977049d
HR		 921static inline int cm_convert_to_ms(int iba_time)
922{
923 /* approximate conversion to ms from 4.096us x 2^iba_time */
924 return 1 << max(iba_time - 8, 0);
925}
926
1d846126
SH		 927/*
928 * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time
929 * Because of how ack_timeout is stored, adding one doubles the timeout.
930 * To avoid large timeouts, select the max(ack_delay, life_time + 1), and
931 * increment it (round up) only if the other is within 50%.
932 */
933static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time)
934{
935 int ack_timeout = packet_life_time + 1;
936
937 if (ack_timeout >= ca_ack_delay)
938 ack_timeout += (ca_ack_delay >= (ack_timeout - 1));
939 else
940 ack_timeout = ca_ack_delay +
941 (ack_timeout >= (ca_ack_delay - 1));
942
943 return min(31, ack_timeout);
944}
945
9767a27e 946static void cm_remove_remote(struct cm_id_private *cm_id_priv)
a977049d 947{
9767a27e
JG		 948 struct cm_timewait_info *timewait_info = cm_id_priv->timewait_info;
949
a977049d
HR		 950 if (timewait_info->inserted_remote_id) {
951 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
952 timewait_info->inserted_remote_id = 0;
953 }
954
955 if (timewait_info->inserted_remote_qp) {
956 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
957 timewait_info->inserted_remote_qp = 0;
958 }
a977049d
HR		 959}
960
f681967a 961static struct cm_timewait_info *cm_create_timewait_info(__be32 local_id)
a977049d
HR		 962{
963 struct cm_timewait_info *timewait_info;
964
de6eb66b 965 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
a977049d
HR		 966 if (!timewait_info)
967 return ERR_PTR(-ENOMEM);
a977049d
HR		 968
969 timewait_info->work.local_id = local_id;
c4028958 970 INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
a977049d
HR		 971 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
972 return timewait_info;
973}
974
975static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
976{
977 int wait_time;
8575329d 978 unsigned long flags;
be4b4993
ES		 979 struct cm_device *cm_dev;
980
00777a68
JG		 981 lockdep_assert_held(&cm_id_priv->lock);
982
be4b4993
ES		 983 cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client);
984 if (!cm_dev)
985 return;
a977049d 986
8575329d 987 spin_lock_irqsave(&cm.lock, flags);
9767a27e 988 cm_remove_remote(cm_id_priv);
8575329d
SH		 989 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
990 spin_unlock_irqrestore(&cm.lock, flags);
a70d0590 991
a977049d
HR		 992 /*
993 * The cm_id could be destroyed by the user before we exit timewait.
994 * To protect against this, we search for the cm_id after exiting
995 * timewait before notifying the user that we've exited timewait.
996 */
997 cm_id_priv->id.state = IB_CM_TIMEWAIT;
1d846126 998 wait_time = cm_convert_to_ms(cm_id_priv->av.timeout);
be4b4993
ES		 999
1000 /* Check if the device started its remove_one */
4bfdf635 1001 spin_lock_irqsave(&cm.lock, flags);
be4b4993
ES		 1002 if (!cm_dev->going_down)
1003 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
1004 msecs_to_jiffies(wait_time));
4bfdf635 1005 spin_unlock_irqrestore(&cm.lock, flags);
be4b4993 1006
09fb406a
JG		 1007 /*
1008 * The timewait_info is converted into a work and gets freed during
1009 * cm_free_work() in cm_timewait_handler().
1010 */
1011 BUILD_BUG_ON(offsetof(struct cm_timewait_info, work) != 0);
a977049d
HR		 1012 cm_id_priv->timewait_info = NULL;
1013}
1014
1015static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
1016{
8575329d
SH		 1017 unsigned long flags;
1018
00777a68
JG		 1019 lockdep_assert_held(&cm_id_priv->lock);
1020
a977049d
HR		 1021 cm_id_priv->id.state = IB_CM_IDLE;
1022 if (cm_id_priv->timewait_info) {
8575329d 1023 spin_lock_irqsave(&cm.lock, flags);
9767a27e 1024 cm_remove_remote(cm_id_priv);
8575329d 1025 spin_unlock_irqrestore(&cm.lock, flags);
a977049d
HR		 1026 kfree(cm_id_priv->timewait_info);
1027 cm_id_priv->timewait_info = NULL;
1028 }
1029}
1030
b68e1acb
MZ		 1031static noinline void cm_destroy_id_wait_timeout(struct ib_cm_id *cm_id,
1032 enum ib_cm_state old_state)
96d9cbe2
MP		 1033{
1034 struct cm_id_private *cm_id_priv;
1035
1036 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
b68e1acb
MZ		 1037 pr_err("%s: cm_id=%p timed out. state %d -> %d, refcnt=%d\n", __func__,
1038 cm_id, old_state, cm_id->state, refcount_read(&cm_id_priv->refcount));
96d9cbe2
MP		 1039}
1040
04c33543 1041static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
a977049d
HR		 1042{
1043 struct cm_id_private *cm_id_priv;
b68e1acb 1044 enum ib_cm_state old_state;
a977049d 1045 struct cm_work *work;
96d9cbe2 1046 int ret;
a977049d
HR		 1047
1048 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
24be6e81 1049 spin_lock_irq(&cm_id_priv->lock);
b68e1acb 1050 old_state = cm_id->state;
67b3c8dc 1051retest:
a977049d
HR		 1052 switch (cm_id->state) {
1053 case IB_CM_LISTEN:
67b3c8dc 1054 spin_lock(&cm.lock);
067b171b
HE		 1055 if (--cm_id_priv->listen_sharecount > 0) {
1056 /* The id is still shared. */
2305d686 1057 WARN_ON(refcount_read(&cm_id_priv->refcount) == 1);
67b3c8dc
JG		 1058 spin_unlock(&cm.lock);
1059 spin_unlock_irq(&cm_id_priv->lock);
067b171b 1060 cm_deref_id(cm_id_priv);
067b171b
HE		 1061 return;
1062 }
67b3c8dc 1063 cm_id->state = IB_CM_IDLE;
a977049d 1064 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
2305d686 1065 RB_CLEAR_NODE(&cm_id_priv->service_node);
67b3c8dc 1066 spin_unlock(&cm.lock);
a977049d
HR		 1067 break;
1068 case IB_CM_SIDR_REQ_SENT:
1069 cm_id->state = IB_CM_IDLE;
70076a41 1070 ib_cancel_mad(cm_id_priv->msg);
a977049d
HR		 1071 break;
1072 case IB_CM_SIDR_REQ_RCVD:
6a8824a7
JG		 1073 cm_send_sidr_rep_locked(cm_id_priv,
1074 &(struct ib_cm_sidr_rep_param){
1075 .status = IB_SIDR_REJECT });
67b3c8dc
JG		 1076 /* cm_send_sidr_rep_locked will not move to IDLE if it fails */
1077 cm_id->state = IB_CM_IDLE;
a977049d
HR		 1078 break;
1079 case IB_CM_REQ_SENT:
c29ed5a4 1080 case IB_CM_MRA_REQ_RCVD:
70076a41 1081 ib_cancel_mad(cm_id_priv->msg);
81ddb41f
JG		 1082 cm_send_rej_locked(cm_id_priv, IB_CM_REJ_TIMEOUT,
1083 &cm_id_priv->id.device->node_guid,
1084 sizeof(cm_id_priv->id.device->node_guid),
1085 NULL, 0);
227eca83 1086 break;
04c33543
MT		 1087 case IB_CM_REQ_RCVD:
1088 if (err == -ENOMEM) {
1089 /* Do not reject to allow future retries. */
1090 cm_reset_to_idle(cm_id_priv);
04c33543 1091 } else {
81ddb41f
JG		 1092 cm_send_rej_locked(cm_id_priv,
1093 IB_CM_REJ_CONSUMER_DEFINED, NULL, 0,
1094 NULL, 0);
04c33543
MT		 1095 }
1096 break;
a977049d
HR		 1097 case IB_CM_REP_SENT:
1098 case IB_CM_MRA_REP_RCVD:
70076a41 1099 ib_cancel_mad(cm_id_priv->msg);
fba97dc7
KCP		 1100 cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL,
1101 0, NULL, 0);
1102 goto retest;
a977049d
HR		 1103 case IB_CM_MRA_REQ_SENT:
1104 case IB_CM_REP_RCVD:
1105 case IB_CM_MRA_REP_SENT:
81ddb41f
JG		 1106 cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL,
1107 0, NULL, 0);
a977049d
HR		 1108 break;
1109 case IB_CM_ESTABLISHED:
e029fdc0 1110 if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
67b3c8dc 1111 cm_id->state = IB_CM_IDLE;
2622e18e 1112 break;
e029fdc0 1113 }
fc0856c3
SH		 1114 cm_issue_dreq(cm_id_priv);
1115 cm_enter_timewait(cm_id_priv);
a977049d
HR		 1116 goto retest;
1117 case IB_CM_DREQ_SENT:
70076a41 1118 ib_cancel_mad(cm_id_priv->msg);
a977049d 1119 cm_enter_timewait(cm_id_priv);
67b3c8dc 1120 goto retest;
a977049d 1121 case IB_CM_DREQ_RCVD:
87cabf3e 1122 cm_send_drep_locked(cm_id_priv, NULL, 0);
67b3c8dc
JG		 1123 WARN_ON(cm_id->state != IB_CM_TIMEWAIT);
1124 goto retest;
1125 case IB_CM_TIMEWAIT:
1126 /*
1127 * The cm_acquire_id in cm_timewait_handler will stop working
1cc44279 1128 * once we do xa_erase below, so just move to idle here for
67b3c8dc
JG		 1129 * consistency.
1130 */
1131 cm_id->state = IB_CM_IDLE;
a977049d 1132 break;
67b3c8dc 1133 case IB_CM_IDLE:
a977049d
HR		 1134 break;
1135 }
67b3c8dc 1136 WARN_ON(cm_id->state != IB_CM_IDLE);
a977049d 1137
bede86a3
JG		 1138 spin_lock(&cm.lock);
1139 /* Required for cleanup paths related cm_req_handler() */
1140 if (cm_id_priv->timewait_info) {
9767a27e 1141 cm_remove_remote(cm_id_priv);
bede86a3
JG		 1142 kfree(cm_id_priv->timewait_info);
1143 cm_id_priv->timewait_info = NULL;
1144 }
3595c398 1145
2305d686
JG		 1146 WARN_ON(cm_id_priv->listen_sharecount);
1147 WARN_ON(!RB_EMPTY_NODE(&cm_id_priv->service_node));
1148 if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node))
1149 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
bede86a3
JG		 1150 spin_unlock(&cm.lock);
1151 spin_unlock_irq(&cm_id_priv->lock);
9db0ff53 1152
eb73060b 1153 xa_erase(&cm.local_id_table, cm_local_id(cm_id->local_id));
1b52fa98 1154 cm_deref_id(cm_id_priv);
96d9cbe2
MP		 1155 do {
1156 ret = wait_for_completion_timeout(&cm_id_priv->comp,
1157 msecs_to_jiffies(
1158 CM_DESTROY_ID_WAIT_TIMEOUT));
1159 if (!ret) /* timeout happened */
b68e1acb 1160 cm_destroy_id_wait_timeout(cm_id, old_state);
96d9cbe2
MP		 1161 } while (!ret);
1162
a977049d
HR		 1163 while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
1164 cm_free_work(work);
b7403217 1165
7345201c
MZ		 1166 cm_destroy_av(&cm_id_priv->av);
1167 cm_destroy_av(&cm_id_priv->alt_av);
6e61d04f 1168 kfree(cm_id_priv->private_data);
4d6e8a03 1169 kfree_rcu(cm_id_priv, rcu);
a977049d 1170}
04c33543
MT		 1171
1172void ib_destroy_cm_id(struct ib_cm_id *cm_id)
1173{
1174 cm_destroy_id(cm_id, 0);
1175}
a977049d
HR		 1176EXPORT_SYMBOL(ib_destroy_cm_id);
1177
a461b746 1178static int cm_init_listen(struct cm_id_private *cm_id_priv, __be64 service_id)
98f67156 1179{
98f67156
JG		 1180 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
1181 (service_id != IB_CM_ASSIGN_SERVICE_ID))
1182 return -EINVAL;
1183
a461b746 1184 if (service_id == IB_CM_ASSIGN_SERVICE_ID)
98f67156 1185 cm_id_priv->id.service_id = cpu_to_be64(cm.listen_service_id++);
a461b746 1186 else
98f67156 1187 cm_id_priv->id.service_id = service_id;
a461b746 1188
98f67156
JG		 1189 return 0;
1190}
1191
067b171b 1192/**
98f67156 1193 * ib_cm_listen - Initiates listening on the specified service ID for
067b171b
HE		 1194 * connection and service ID resolution requests.
1195 * @cm_id: Connection identifier associated with the listen request.
1196 * @service_id: Service identifier matched against incoming connection
1197 * and service ID resolution requests. The service ID should be specified
1198 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
1199 * assign a service ID to the caller.
067b171b 1200 */
91a3f14e 1201int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id)
a977049d 1202{
98f67156
JG		 1203 struct cm_id_private *cm_id_priv =
1204 container_of(cm_id, struct cm_id_private, id);
1205 unsigned long flags;
1206 int ret;
73fec7fd 1207
98f67156
JG		 1208 spin_lock_irqsave(&cm_id_priv->lock, flags);
1209 if (cm_id_priv->id.state != IB_CM_IDLE) {
1210 ret = -EINVAL;
1211 goto out;
a977049d 1212 }
a977049d 1213
a461b746 1214 ret = cm_init_listen(cm_id_priv, service_id);
98f67156
JG		 1215 if (ret)
1216 goto out;
1217
1218 if (!cm_insert_listen(cm_id_priv, NULL)) {
a977049d 1219 ret = -EBUSY;
98f67156 1220 goto out;
a977049d 1221 }
73fec7fd 1222
98f67156
JG		 1223 cm_id_priv->id.state = IB_CM_LISTEN;
1224 ret = 0;
73fec7fd 1225
98f67156
JG		 1226out:
1227 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
73fec7fd 1228 return ret;
067b171b 1229}
a977049d
HR		 1230EXPORT_SYMBOL(ib_cm_listen);
1231
067b171b 1232/**
2988ca08
MCC		 1233 * ib_cm_insert_listen - Create a new listening ib_cm_id and listen on
1234 * the given service ID.
067b171b
HE		 1235 *
1236 * If there's an existing ID listening on that same device and service ID,
1237 * return it.
1238 *
1239 * @device: Device associated with the cm_id. All related communication will
1240 * be associated with the specified device.
1241 * @cm_handler: Callback invoked to notify the user of CM events.
1242 * @service_id: Service identifier matched against incoming connection
1243 * and service ID resolution requests. The service ID should be specified
1244 * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
1245 * assign a service ID to the caller.
1246 *
1247 * Callers should call ib_destroy_cm_id when done with the listener ID.
1248 */
1249struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
1250 ib_cm_handler cm_handler,
1251 __be64 service_id)
1252{
98f67156 1253 struct cm_id_private *listen_id_priv;
067b171b 1254 struct cm_id_private *cm_id_priv;
067b171b
HE		 1255 int err = 0;
1256
1257 /* Create an ID in advance, since the creation may sleep */
98f67156
JG		 1258 cm_id_priv = cm_alloc_id_priv(device, cm_handler, NULL);
1259 if (IS_ERR(cm_id_priv))
1260 return ERR_CAST(cm_id_priv);
067b171b 1261
a461b746 1262 err = cm_init_listen(cm_id_priv, service_id);
2990f223
ML		 1263 if (err) {
1264 ib_destroy_cm_id(&cm_id_priv->id);
98f67156 1265 return ERR_PTR(err);
2990f223 1266 }
067b171b 1267
98f67156
JG		 1268 spin_lock_irq(&cm_id_priv->lock);
1269 listen_id_priv = cm_insert_listen(cm_id_priv, cm_handler);
1270 if (listen_id_priv != cm_id_priv) {
1271 spin_unlock_irq(&cm_id_priv->lock);
1272 ib_destroy_cm_id(&cm_id_priv->id);
1273 if (!listen_id_priv)
067b171b 1274 return ERR_PTR(-EINVAL);
98f67156 1275 return &listen_id_priv->id;
067b171b 1276 }
98f67156
JG		 1277 cm_id_priv->id.state = IB_CM_LISTEN;
1278 spin_unlock_irq(&cm_id_priv->lock);
067b171b 1279
98f67156
JG		 1280 /*
1281 * A listen ID does not need to be in the xarray since it does not
1282 * receive mads, is not placed in the remote_id or remote_qpn rbtree,
1283 * and does not enter timewait.
1284 */
067b171b 1285
98f67156 1286 return &cm_id_priv->id;
067b171b
HE		 1287}
1288EXPORT_SYMBOL(ib_cm_insert_listen);
1289
87a37ce9 1290static __be64 cm_form_tid(struct cm_id_private *cm_id_priv)
a977049d 1291{
76039ac9
MZ		 1292 u64 hi_tid = 0, low_tid;
1293
1294 lockdep_assert_held(&cm_id_priv->lock);
1295
1296 low_tid = (u64)cm_id_priv->id.local_id;
1297 if (!cm_id_priv->av.port)
1298 return cpu_to_be64(low_tid);
a977049d 1299
4dab26be 1300 read_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
76039ac9
MZ		 1301 if (cm_id_priv->av.port->mad_agent)
1302 hi_tid = ((u64)cm_id_priv->av.port->mad_agent->hi_tid) << 32;
4dab26be 1303 read_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
a977049d
HR		 1304 return cpu_to_be64(hi_tid | low_tid);
1305}
1306
1307static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
97f52eb4 1308 __be16 attr_id, __be64 tid)
a977049d
HR		 1309{
1310 hdr->base_version = IB_MGMT_BASE_VERSION;
1311 hdr->mgmt_class = IB_MGMT_CLASS_CM;
1312 hdr->class_version = IB_CM_CLASS_VERSION;
1313 hdr->method = IB_MGMT_METHOD_SEND;
1314 hdr->attr_id = attr_id;
1315 hdr->tid = tid;
1316}
1317
a20652e1
LR		 1318static void cm_format_mad_ece_hdr(struct ib_mad_hdr *hdr, __be16 attr_id,
1319 __be64 tid, u32 attr_mod)
1320{
1321 cm_format_mad_hdr(hdr, attr_id, tid);
1322 hdr->attr_mod = cpu_to_be32(attr_mod);
1323}
1324
a977049d
HR		 1325static void cm_format_req(struct cm_req_msg *req_msg,
1326 struct cm_id_private *cm_id_priv,
1327 struct ib_cm_req_param *param)
1328{
c2f8fc4e
DC		 1329 struct sa_path_rec *pri_path = param->primary_path;
1330 struct sa_path_rec *alt_path = param->alternate_path;
e92aa00a 1331 bool pri_ext = false;
eb8336db 1332 __be16 lid;
e92aa00a
HD		 1333
1334 if (pri_path->rec_type == SA_PATH_REC_TYPE_OPA)
1335 pri_ext = opa_is_extended_lid(pri_path->opa.dlid,
1336 pri_path->opa.slid);
3971c9f6 1337
a20652e1
LR		 1338 cm_format_mad_ece_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
1339 cm_form_tid(cm_id_priv), param->ece.attr_mod);
a977049d 1340
91b60a71
JG		 1341 IBA_SET(CM_REQ_LOCAL_COMM_ID, req_msg,
1342 be32_to_cpu(cm_id_priv->id.local_id));
1343 IBA_SET(CM_REQ_SERVICE_ID, req_msg, be64_to_cpu(param->service_id));
1344 IBA_SET(CM_REQ_LOCAL_CA_GUID, req_msg,
1345 be64_to_cpu(cm_id_priv->id.device->node_guid));
01adb7f4 1346 IBA_SET(CM_REQ_LOCAL_QPN, req_msg, param->qp_num);
b6bbee68
JG		 1347 IBA_SET(CM_REQ_INITIATOR_DEPTH, req_msg, param->initiator_depth);
1348 IBA_SET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg,
1349 param->remote_cm_response_timeout);
a977049d 1350 cm_req_set_qp_type(req_msg, param->qp_type);
b6bbee68 1351 IBA_SET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg, param->flow_control);
01adb7f4 1352 IBA_SET(CM_REQ_STARTING_PSN, req_msg, param->starting_psn);
b6bbee68
JG		 1353 IBA_SET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg,
1354 param->local_cm_response_timeout);
91b60a71
JG		 1355 IBA_SET(CM_REQ_PARTITION_KEY, req_msg,
1356 be16_to_cpu(param->primary_path->pkey));
b6bbee68
JG		 1357 IBA_SET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg,
1358 param->primary_path->mtu);
1359 IBA_SET(CM_REQ_MAX_CM_RETRIES, req_msg, param->max_cm_retries);
d26a360b
SH		 1360
1361 if (param->qp_type != IB_QPT_XRC_INI) {
b6bbee68
JG		 1362 IBA_SET(CM_REQ_RESPONDER_RESOURCES, req_msg,
1363 param->responder_resources);
1364 IBA_SET(CM_REQ_RETRY_COUNT, req_msg, param->retry_count);
1365 IBA_SET(CM_REQ_RNR_RETRY_COUNT, req_msg,
1366 param->rnr_retry_count);
1367 IBA_SET(CM_REQ_SRQ, req_msg, param->srq);
d26a360b 1368 }
a977049d 1369
4ca662a3
JG		 1370 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg) =
1371 pri_path->sgid;
1372 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg) =
1373 pri_path->dgid;
e92aa00a 1374 if (pri_ext) {
4ca662a3
JG		 1375 IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg)
1376 ->global.interface_id =
1377 OPA_MAKE_ID(be32_to_cpu(pri_path->opa.slid));
1378 IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg)
1379 ->global.interface_id =
1380 OPA_MAKE_ID(be32_to_cpu(pri_path->opa.dlid));
e92aa00a 1381 }
3971c9f6 1382 if (pri_path->hop_limit <= 1) {
91b60a71
JG		 1383 IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
1384 be16_to_cpu(pri_ext ? 0 :
1385 htons(ntohl(sa_path_get_slid(
1386 pri_path)))));
1387 IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
1388 be16_to_cpu(pri_ext ? 0 :
1389 htons(ntohl(sa_path_get_dlid(
1390 pri_path)))));
3971c9f6 1391 } else {
eb8336db
MZ		 1392
1393 if (param->primary_path_inbound) {
1394 lid = param->primary_path_inbound->ib.dlid;
1395 IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
1396 be16_to_cpu(lid));
1397 } else
1398 IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
1399 be16_to_cpu(IB_LID_PERMISSIVE));
1400
3971c9f6 1401 /* Work-around until there's a way to obtain remote LID info */
91b60a71
JG		 1402 IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
1403 be16_to_cpu(IB_LID_PERMISSIVE));
3971c9f6 1404 }
01adb7f4
JG		 1405 IBA_SET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg,
1406 be32_to_cpu(pri_path->flow_label));
b6bbee68 1407 IBA_SET(CM_REQ_PRIMARY_PACKET_RATE, req_msg, pri_path->rate);
91b60a71
JG		 1408 IBA_SET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg, pri_path->traffic_class);
1409 IBA_SET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg, pri_path->hop_limit);
b6bbee68
JG		 1410 IBA_SET(CM_REQ_PRIMARY_SL, req_msg, pri_path->sl);
1411 IBA_SET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg,
1412 (pri_path->hop_limit <= 1));
1413 IBA_SET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg,
1d846126 1414 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
3971c9f6 1415 pri_path->packet_life_time));
a977049d 1416
3971c9f6 1417 if (alt_path) {
e92aa00a
HD		 1418 bool alt_ext = false;
1419
1420 if (alt_path->rec_type == SA_PATH_REC_TYPE_OPA)
1421 alt_ext = opa_is_extended_lid(alt_path->opa.dlid,
1422 alt_path->opa.slid);
1423
4ca662a3
JG		 1424 *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg) =
1425 alt_path->sgid;
1426 *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg) =
1427 alt_path->dgid;
e92aa00a 1428 if (alt_ext) {
4ca662a3
JG		 1429 IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID,
1430 req_msg)
1431 ->global.interface_id =
1432 OPA_MAKE_ID(be32_to_cpu(alt_path->opa.slid));
1433 IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID,
1434 req_msg)
1435 ->global.interface_id =
1436 OPA_MAKE_ID(be32_to_cpu(alt_path->opa.dlid));
e92aa00a 1437 }
3971c9f6 1438 if (alt_path->hop_limit <= 1) {
91b60a71
JG		 1439 IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
1440 be16_to_cpu(
1441 alt_ext ? 0 :
1442 htons(ntohl(sa_path_get_slid(
1443 alt_path)))));
1444 IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
1445 be16_to_cpu(
1446 alt_ext ? 0 :
1447 htons(ntohl(sa_path_get_dlid(
1448 alt_path)))));
3971c9f6 1449 } else {
91b60a71
JG		 1450 IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
1451 be16_to_cpu(IB_LID_PERMISSIVE));
1452 IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
1453 be16_to_cpu(IB_LID_PERMISSIVE));
3971c9f6 1454 }
01adb7f4
JG		 1455 IBA_SET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg,
1456 be32_to_cpu(alt_path->flow_label));
b6bbee68 1457 IBA_SET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg, alt_path->rate);
91b60a71
JG		 1458 IBA_SET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg,
1459 alt_path->traffic_class);
1460 IBA_SET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg,
1461 alt_path->hop_limit);
b6bbee68
JG		 1462 IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, alt_path->sl);
1463 IBA_SET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg,
1464 (alt_path->hop_limit <= 1));
1465 IBA_SET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg,
1d846126 1466 cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
3971c9f6 1467 alt_path->packet_life_time));
a977049d 1468 }
a20652e1 1469 IBA_SET(CM_REQ_VENDOR_ID, req_msg, param->ece.vendor_id);
a977049d
HR		 1470
1471 if (param->private_data && param->private_data_len)
4ca662a3
JG		 1472 IBA_SET_MEM(CM_REQ_PRIVATE_DATA, req_msg, param->private_data,
1473 param->private_data_len);
a977049d
HR		 1474}
1475
858119e1 1476static int cm_validate_req_param(struct ib_cm_req_param *param)
a977049d 1477{
a977049d
HR		 1478 if (!param->primary_path)
1479 return -EINVAL;
1480
d26a360b
SH		 1481 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC &&
1482 param->qp_type != IB_QPT_XRC_INI)
a977049d
HR		 1483 return -EINVAL;
1484
1485 if (param->private_data &&
1486 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
1487 return -EINVAL;
1488
1489 if (param->alternate_path &&
1490 (param->alternate_path->pkey != param->primary_path->pkey ||
1491 param->alternate_path->mtu != param->primary_path->mtu))
1492 return -EINVAL;
1493
1494 return 0;
1495}
1496
1497int ib_send_cm_req(struct ib_cm_id *cm_id,
1498 struct ib_cm_req_param *param)
1499{
7345201c 1500 struct cm_av av = {}, alt_av = {};
a977049d 1501 struct cm_id_private *cm_id_priv;
4b4e586e 1502 struct ib_mad_send_buf *msg;
a977049d
HR		 1503 struct cm_req_msg *req_msg;
1504 unsigned long flags;
1505 int ret;
1506
1507 ret = cm_validate_req_param(param);
1508 if (ret)
1509 return ret;
1510
1511 /* Verify that we're not in timewait. */
1512 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
1513 spin_lock_irqsave(&cm_id_priv->lock, flags);
bede86a3 1514 if (cm_id->state != IB_CM_IDLE || WARN_ON(cm_id_priv->timewait_info)) {
a977049d 1515 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
7345201c 1516 return -EINVAL;
a977049d
HR		 1517 }
1518 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1519
1520 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
1521 id.local_id);
75df23e2
SH		 1522 if (IS_ERR(cm_id_priv->timewait_info)) {
1523 ret = PTR_ERR(cm_id_priv->timewait_info);
340b940e 1524 cm_id_priv->timewait_info = NULL;
7345201c 1525 return ret;
75df23e2 1526 }
a977049d 1527
39839107 1528 ret = cm_init_av_by_path(param->primary_path,
7345201c 1529 param->ppath_sgid_attr, &av);
a977049d 1530 if (ret)
7345201c 1531 return ret;
a977049d 1532 if (param->alternate_path) {
39839107 1533 ret = cm_init_av_by_path(param->alternate_path, NULL,
7345201c
MZ		 1534 &alt_av);
1535 if (ret) {
1536 cm_destroy_av(&av);
1537 return ret;
1538 }
a977049d
HR		 1539 }
1540 cm_id->service_id = param->service_id;
a977049d
HR		 1541 cm_id_priv->timeout_ms = cm_convert_to_ms(
1542 param->primary_path->packet_life_time) * 2 +
1543 cm_convert_to_ms(
1544 param->remote_cm_response_timeout);
1545 cm_id_priv->max_cm_retries = param->max_cm_retries;
1546 cm_id_priv->initiator_depth = param->initiator_depth;
1547 cm_id_priv->responder_resources = param->responder_resources;
1548 cm_id_priv->retry_count = param->retry_count;
1549 cm_id_priv->path_mtu = param->primary_path->mtu;
e1444b5a 1550 cm_id_priv->pkey = param->primary_path->pkey;
ae7971a7 1551 cm_id_priv->qp_type = param->qp_type;
a977049d 1552
4b4e586e 1553 spin_lock_irqsave(&cm_id_priv->lock, flags);
7345201c
MZ		 1554
1555 cm_move_av_from_path(&cm_id_priv->av, &av);
eb8336db
MZ		 1556 if (param->primary_path_outbound)
1557 cm_id_priv->av.dlid_datapath =
1558 be16_to_cpu(param->primary_path_outbound->ib.dlid);
1559
7345201c
MZ		 1560 if (param->alternate_path)
1561 cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av);
1562
1e515921 1563 msg = cm_alloc_priv_msg(cm_id_priv, IB_CM_REQ_SENT);
4b4e586e
JG		 1564 if (IS_ERR(msg)) {
1565 ret = PTR_ERR(msg);
1566 goto out_unlock;
1567 }
a977049d 1568
4b4e586e 1569 req_msg = (struct cm_req_msg *)msg->mad;
a977049d
HR		 1570 cm_format_req(req_msg, cm_id_priv, param);
1571 cm_id_priv->tid = req_msg->hdr.tid;
a977049d 1572
01adb7f4
JG		 1573 cm_id_priv->local_qpn = cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg));
1574 cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg));
a977049d 1575
8dc105be 1576 trace_icm_send_req(&cm_id_priv->id);
4b4e586e
JG		 1577 ret = ib_post_send_mad(msg, NULL);
1578 if (ret)
1579 goto out_free;
a977049d
HR		 1580 BUG_ON(cm_id->state != IB_CM_IDLE);
1581 cm_id->state = IB_CM_REQ_SENT;
1582 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
1583 return 0;
4b4e586e
JG		 1584out_free:
1585 cm_free_priv_msg(msg);
1586out_unlock:
1587 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
96376a40 1588 return ret;
a977049d
HR		 1589}
1590EXPORT_SYMBOL(ib_send_cm_req);
1591
1592static int cm_issue_rej(struct cm_port *port,
1593 struct ib_mad_recv_wc *mad_recv_wc,
1594 enum ib_cm_rej_reason reason,
1595 enum cm_msg_response msg_rejected,
1596 void *ari, u8 ari_length)
1597{
1598 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1599 struct cm_rej_msg *rej_msg, *rcv_msg;
1600 int ret;
1601
04924587 1602 ret = cm_alloc_response_msg(port, mad_recv_wc, false, &msg);
a977049d
HR		 1603 if (ret)
1604 return ret;
1605
1606 /* We just need common CM header information. Cast to any message. */
1607 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
1608 rej_msg = (struct cm_rej_msg *) msg->mad;
1609
1610 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
91b60a71
JG		 1611 IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg,
1612 IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg));
1613 IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
1614 IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg));
b6bbee68 1615 IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, msg_rejected);
91b60a71 1616 IBA_SET(CM_REJ_REASON, rej_msg, reason);
a977049d
HR		 1617
1618 if (ari && ari_length) {
b6bbee68 1619 IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length);
4ca662a3 1620 IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length);
a977049d
HR		 1621 }
1622
8dc105be
CL		 1623 trace_icm_issue_rej(
1624 IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg),
1625 IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg));
34816ad9 1626 ret = ib_post_send_mad(msg, NULL);
a977049d 1627 if (ret)
1e515921 1628 cm_free_msg(msg);
a977049d
HR		 1629
1630 return ret;
1631}
1632
6b3c0e6e
DC		 1633static bool cm_req_has_alt_path(struct cm_req_msg *req_msg)
1634{
91b60a71
JG		 1635 return ((cpu_to_be16(
1636 IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg))) ||
4ca662a3
JG		 1637 (ib_is_opa_gid(IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID,
1638 req_msg))));
6b3c0e6e
DC		 1639}
1640
1fb7f897 1641static void cm_path_set_rec_type(struct ib_device *ib_device, u32 port_num,
6b3c0e6e
DC		 1642 struct sa_path_rec *path, union ib_gid *gid)
1643{
1644 if (ib_is_opa_gid(gid) && rdma_cap_opa_ah(ib_device, port_num))
1645 path->rec_type = SA_PATH_REC_TYPE_OPA;
1646 else
1647 path->rec_type = SA_PATH_REC_TYPE_IB;
1648}
1649
ac3a949f
DC		 1650static void cm_format_path_lid_from_req(struct cm_req_msg *req_msg,
1651 struct sa_path_rec *primary_path,
b7d95040
MZ		 1652 struct sa_path_rec *alt_path,
1653 struct ib_wc *wc)
ac3a949f
DC		 1654{
1655 u32 lid;
1656
1657 if (primary_path->rec_type != SA_PATH_REC_TYPE_OPA) {
b7d95040 1658 sa_path_set_dlid(primary_path, wc->slid);
ac3a949f 1659 sa_path_set_slid(primary_path,
91b60a71
JG		 1660 IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID,
1661 req_msg));
ac3a949f 1662 } else {
4ca662a3
JG		 1663 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1664 CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg));
9d187177 1665 sa_path_set_dlid(primary_path, lid);
ac3a949f 1666
4ca662a3
JG		 1667 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1668 CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg));
9d187177 1669 sa_path_set_slid(primary_path, lid);
ac3a949f
DC		 1670 }
1671
1672 if (!cm_req_has_alt_path(req_msg))
1673 return;
1674
1675 if (alt_path->rec_type != SA_PATH_REC_TYPE_OPA) {
91b60a71
JG		 1676 sa_path_set_dlid(alt_path,
1677 IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID,
1678 req_msg));
1679 sa_path_set_slid(alt_path,
1680 IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID,
1681 req_msg));
ac3a949f 1682 } else {
4ca662a3
JG		 1683 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1684 CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg));
9d187177 1685 sa_path_set_dlid(alt_path, lid);
ac3a949f 1686
4ca662a3
JG		 1687 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
1688 CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg));
9d187177 1689 sa_path_set_slid(alt_path, lid);
ac3a949f
DC		 1690 }
1691}
1692
858119e1 1693static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
c2f8fc4e 1694 struct sa_path_rec *primary_path,
b7d95040
MZ		 1695 struct sa_path_rec *alt_path,
1696 struct ib_wc *wc)
a977049d 1697{
4ca662a3
JG		 1698 primary_path->dgid =
1699 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg);
1700 primary_path->sgid =
1701 *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg);
01adb7f4
JG		 1702 primary_path->flow_label =
1703 cpu_to_be32(IBA_GET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg));
91b60a71
JG		 1704 primary_path->hop_limit = IBA_GET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg);
1705 primary_path->traffic_class =
1706 IBA_GET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg);
a977049d 1707 primary_path->reversible = 1;
91b60a71
JG		 1708 primary_path->pkey =
1709 cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
b6bbee68 1710 primary_path->sl = IBA_GET(CM_REQ_PRIMARY_SL, req_msg);
a977049d 1711 primary_path->mtu_selector = IB_SA_EQ;
b6bbee68 1712 primary_path->mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
a977049d 1713 primary_path->rate_selector = IB_SA_EQ;
b6bbee68 1714 primary_path->rate = IBA_GET(CM_REQ_PRIMARY_PACKET_RATE, req_msg);
a977049d
HR		 1715 primary_path->packet_life_time_selector = IB_SA_EQ;
1716 primary_path->packet_life_time =
b6bbee68 1717 IBA_GET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg);
a977049d 1718 primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
91b60a71
JG		 1719 primary_path->service_id =
1720 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
114cc9c4
PP		 1721 if (sa_path_is_roce(primary_path))
1722 primary_path->roce.route_resolved = false;
a977049d 1723
ac3a949f 1724 if (cm_req_has_alt_path(req_msg)) {
4ca662a3
JG		 1725 alt_path->dgid = *IBA_GET_MEM_PTR(
1726 CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg);
1727 alt_path->sgid = *IBA_GET_MEM_PTR(
1728 CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg);
01adb7f4
JG		 1729 alt_path->flow_label = cpu_to_be32(
1730 IBA_GET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg));
91b60a71
JG		 1731 alt_path->hop_limit =
1732 IBA_GET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg);
1733 alt_path->traffic_class =
1734 IBA_GET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg);
a977049d 1735 alt_path->reversible = 1;
91b60a71
JG		 1736 alt_path->pkey =
1737 cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
b6bbee68 1738 alt_path->sl = IBA_GET(CM_REQ_ALTERNATE_SL, req_msg);
a977049d 1739 alt_path->mtu_selector = IB_SA_EQ;
b6bbee68
JG		 1740 alt_path->mtu =
1741 IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
a977049d 1742 alt_path->rate_selector = IB_SA_EQ;
b6bbee68 1743 alt_path->rate = IBA_GET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg);
a977049d
HR		 1744 alt_path->packet_life_time_selector = IB_SA_EQ;
1745 alt_path->packet_life_time =
b6bbee68 1746 IBA_GET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg);
a977049d 1747 alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
91b60a71
JG		 1748 alt_path->service_id =
1749 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
114cc9c4
PP		 1750
1751 if (sa_path_is_roce(alt_path))
1752 alt_path->roce.route_resolved = false;
a977049d 1753 }
b7d95040 1754 cm_format_path_lid_from_req(req_msg, primary_path, alt_path, wc);
a977049d
HR		 1755}
1756
24cad9a7
HE		 1757static u16 cm_get_bth_pkey(struct cm_work *work)
1758{
1759 struct ib_device *ib_dev = work->port->cm_dev->ib_device;
1fb7f897 1760 u32 port_num = work->port->port_num;
24cad9a7
HE		 1761 u16 pkey_index = work->mad_recv_wc->wc->pkey_index;
1762 u16 pkey;
1763 int ret;
1764
1765 ret = ib_get_cached_pkey(ib_dev, port_num, pkey_index, &pkey);
1766 if (ret) {
3cea7b4a 1767 dev_warn_ratelimited(&ib_dev->dev, "ib_cm: Couldn't retrieve pkey for incoming request (port %u, pkey index %u). %d\n",
24cad9a7
HE		 1768 port_num, pkey_index, ret);
1769 return 0;
1770 }
1771
1772 return pkey;
1773}
1774
c5c4e40e 1775/**
2988ca08 1776 * cm_opa_to_ib_sgid - Convert OPA SGID to IB SGID
c5c4e40e
DH		 1777 * ULPs (such as IPoIB) do not understand OPA GIDs and will
1778 * reject them as the local_gid will not match the sgid. Therefore,
1779 * change the pathrec's SGID to an IB SGID.
1780 *
1781 * @work: Work completion
1782 * @path: Path record
1783 */
1784static void cm_opa_to_ib_sgid(struct cm_work *work,
1785 struct sa_path_rec *path)
1786{
1787 struct ib_device *dev = work->port->cm_dev->ib_device;
1fb7f897 1788 u32 port_num = work->port->port_num;
c5c4e40e
DH		 1789
1790 if (rdma_cap_opa_ah(dev, port_num) &&
1791 (ib_is_opa_gid(&path->sgid))) {
1792 union ib_gid sgid;
1793
1dfce294 1794 if (rdma_query_gid(dev, port_num, 0, &sgid)) {
c5c4e40e
DH		 1795 dev_warn(&dev->dev,
1796 "Error updating sgid in CM request\n");
1797 return;
1798 }
1799
1800 path->sgid = sgid;
1801 }
1802}
1803
a977049d
HR		 1804static void cm_format_req_event(struct cm_work *work,
1805 struct cm_id_private *cm_id_priv,
1806 struct ib_cm_id *listen_id)
1807{
1808 struct cm_req_msg *req_msg;
1809 struct ib_cm_req_event_param *param;
1810
1811 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1812 param = &work->cm_event.param.req_rcvd;
1813 param->listen_id = listen_id;
24cad9a7 1814 param->bth_pkey = cm_get_bth_pkey(work);
a977049d
HR		 1815 param->port = cm_id_priv->av.port->port_num;
1816 param->primary_path = &work->path[0];
c5c4e40e
DH		 1817 cm_opa_to_ib_sgid(work, param->primary_path);
1818 if (cm_req_has_alt_path(req_msg)) {
a977049d 1819 param->alternate_path = &work->path[1];
c5c4e40e
DH		 1820 cm_opa_to_ib_sgid(work, param->alternate_path);
1821 } else {
a977049d 1822 param->alternate_path = NULL;
c5c4e40e 1823 }
91b60a71
JG		 1824 param->remote_ca_guid =
1825 cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg));
1826 param->remote_qkey = IBA_GET(CM_REQ_LOCAL_Q_KEY, req_msg);
01adb7f4 1827 param->remote_qpn = IBA_GET(CM_REQ_LOCAL_QPN, req_msg);
a977049d 1828 param->qp_type = cm_req_get_qp_type(req_msg);
01adb7f4 1829 param->starting_psn = IBA_GET(CM_REQ_STARTING_PSN, req_msg);
b6bbee68
JG		 1830 param->responder_resources = IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg);
1831 param->initiator_depth = IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg);
a977049d 1832 param->local_cm_response_timeout =
b6bbee68
JG		 1833 IBA_GET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg);
1834 param->flow_control = IBA_GET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg);
a977049d 1835 param->remote_cm_response_timeout =
b6bbee68
JG		 1836 IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg);
1837 param->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg);
1838 param->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg);
1839 param->srq = IBA_GET(CM_REQ_SRQ, req_msg);
cee10433 1840 param->ppath_sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr;
a20652e1
LR		 1841 param->ece.vendor_id = IBA_GET(CM_REQ_VENDOR_ID, req_msg);
1842 param->ece.attr_mod = be32_to_cpu(req_msg->hdr.attr_mod);
1843
4ca662a3
JG		 1844 work->cm_event.private_data =
1845 IBA_GET_MEM_PTR(CM_REQ_PRIVATE_DATA, req_msg);
a977049d
HR		 1846}
1847
1848static void cm_process_work(struct cm_id_private *cm_id_priv,
1849 struct cm_work *work)
1850{
a977049d
HR		 1851 int ret;
1852
1853 /* We will typically only have the current event to report. */
1854 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
1855 cm_free_work(work);
1856
1857 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
24be6e81 1858 spin_lock_irq(&cm_id_priv->lock);
a977049d 1859 work = cm_dequeue_work(cm_id_priv);
24be6e81 1860 spin_unlock_irq(&cm_id_priv->lock);
2f5059a7
LR		 1861 if (!work)
1862 return;
1863
a977049d
HR		 1864 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
1865 &work->cm_event);
1866 cm_free_work(work);
1867 }
1868 cm_deref_id(cm_id_priv);
1869 if (ret)
04c33543 1870 cm_destroy_id(&cm_id_priv->id, ret);
a977049d
HR		 1871}
1872
1873static void cm_format_mra(struct cm_mra_msg *mra_msg,
1874 struct cm_id_private *cm_id_priv,
45611fe8 1875 enum cm_msg_response msg_mraed,
a977049d
HR		 1876 const void *private_data, u8 private_data_len)
1877{
1878 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
b6bbee68 1879 IBA_SET(CM_MRA_MESSAGE_MRAED, mra_msg, msg_mraed);
91b60a71
JG		 1880 IBA_SET(CM_MRA_LOCAL_COMM_ID, mra_msg,
1881 be32_to_cpu(cm_id_priv->id.local_id));
1882 IBA_SET(CM_MRA_REMOTE_COMM_ID, mra_msg,
1883 be32_to_cpu(cm_id_priv->id.remote_id));
45611fe8 1884 IBA_SET(CM_MRA_SERVICE_TIMEOUT, mra_msg, CM_MRA_SETTING);
a977049d
HR		 1885
1886 if (private_data && private_data_len)
4ca662a3
JG		 1887 IBA_SET_MEM(CM_MRA_PRIVATE_DATA, mra_msg, private_data,
1888 private_data_len);
a977049d
HR		 1889}
1890
1891static void cm_format_rej(struct cm_rej_msg *rej_msg,
1892 struct cm_id_private *cm_id_priv,
0c6949c3
LR		 1893 enum ib_cm_rej_reason reason, void *ari,
1894 u8 ari_length, const void *private_data,
1895 u8 private_data_len, enum ib_cm_state state)
a977049d 1896{
00777a68
JG		 1897 lockdep_assert_held(&cm_id_priv->lock);
1898
a977049d 1899 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
91b60a71
JG		 1900 IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg,
1901 be32_to_cpu(cm_id_priv->id.remote_id));
a977049d 1902
0c6949c3 1903 switch (state) {
a977049d 1904 case IB_CM_REQ_RCVD:
91b60a71 1905 IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(0));
b6bbee68 1906 IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ);
a977049d
HR		 1907 break;
1908 case IB_CM_MRA_REQ_SENT:
91b60a71
JG		 1909 IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
1910 be32_to_cpu(cm_id_priv->id.local_id));
b6bbee68 1911 IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ);
a977049d
HR		 1912 break;
1913 case IB_CM_REP_RCVD:
1914 case IB_CM_MRA_REP_SENT:
91b60a71
JG		 1915 IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
1916 be32_to_cpu(cm_id_priv->id.local_id));
b6bbee68 1917 IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REP);
a977049d
HR		 1918 break;
1919 default:
91b60a71
JG		 1920 IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
1921 be32_to_cpu(cm_id_priv->id.local_id));
b6bbee68
JG		 1922 IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg,
1923 CM_MSG_RESPONSE_OTHER);
a977049d
HR		 1924 break;
1925 }
1926
91b60a71 1927 IBA_SET(CM_REJ_REASON, rej_msg, reason);
a977049d 1928 if (ari && ari_length) {
b6bbee68 1929 IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length);
4ca662a3 1930 IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length);
a977049d
HR		 1931 }
1932
1933 if (private_data && private_data_len)
4ca662a3
JG		 1934 IBA_SET_MEM(CM_REJ_PRIVATE_DATA, rej_msg, private_data,
1935 private_data_len);
a977049d
HR		 1936}
1937
1938static void cm_dup_req_handler(struct cm_work *work,
1939 struct cm_id_private *cm_id_priv)
1940{
1941 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 1942 int ret;
1943
526a12c8
JG		 1944 atomic_long_inc(
1945 &work->port->counters[CM_RECV_DUPLICATES][CM_REQ_COUNTER]);
9af57b7a 1946
a977049d 1947 /* Quick state check to discard duplicate REQs. */
d1de9a88
JG		 1948 spin_lock_irq(&cm_id_priv->lock);
1949 if (cm_id_priv->id.state == IB_CM_REQ_RCVD) {
1950 spin_unlock_irq(&cm_id_priv->lock);
a977049d 1951 return;
d1de9a88
JG		 1952 }
1953 spin_unlock_irq(&cm_id_priv->lock);
a977049d 1954
04924587 1955 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, true, &msg);
a977049d
HR		 1956 if (ret)
1957 return;
1958
24be6e81 1959 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 1960 switch (cm_id_priv->id.state) {
1961 case IB_CM_MRA_REQ_SENT:
1962 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
45611fe8 1963 CM_MSG_RESPONSE_REQ,
a977049d
HR		 1964 cm_id_priv->private_data,
1965 cm_id_priv->private_data_len);
1966 break;
1967 case IB_CM_TIMEWAIT:
0c6949c3
LR		 1968 cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv,
1969 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0,
1970 IB_CM_TIMEWAIT);
a977049d
HR		 1971 break;
1972 default:
1973 goto unlock;
1974 }
24be6e81 1975 spin_unlock_irq(&cm_id_priv->lock);
a977049d 1976
8dc105be 1977 trace_icm_send_dup_req(&cm_id_priv->id);
34816ad9 1978 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 1979 if (ret)
1980 goto free;
1981 return;
1982
24be6e81 1983unlock: spin_unlock_irq(&cm_id_priv->lock);
1e515921 1984free: cm_free_msg(msg);
a977049d
HR		 1985}
1986
f681967a
WL		 1987static struct cm_id_private *cm_match_req(struct cm_work *work,
1988 struct cm_id_private *cm_id_priv)
a977049d
HR		 1989{
1990 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
1991 struct cm_timewait_info *timewait_info;
1992 struct cm_req_msg *req_msg;
a977049d
HR		 1993
1994 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
1995
d998ccce 1996 /* Check for possible duplicate REQ. */
24be6e81 1997 spin_lock_irq(&cm.lock);
a977049d 1998 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
a977049d 1999 if (timewait_info) {
4d6e8a03 2000 cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
a977049d 2001 timewait_info->work.remote_id);
24be6e81 2002 spin_unlock_irq(&cm.lock);
a977049d
HR		 2003 if (cur_cm_id_priv) {
2004 cm_dup_req_handler(work, cur_cm_id_priv);
2005 cm_deref_id(cur_cm_id_priv);
d998ccce
SH		 2006 }
2007 return NULL;
2008 }
2009
2010 /* Check for stale connections. */
2011 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
2012 if (timewait_info) {
9767a27e 2013 cm_remove_remote(cm_id_priv);
4d6e8a03 2014 cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
9315bc9a
HWR		 2015 timewait_info->work.remote_id);
2016
24be6e81 2017 spin_unlock_irq(&cm.lock);
d998ccce
SH		 2018 cm_issue_rej(work->port, work->mad_recv_wc,
2019 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
2020 NULL, 0);
9315bc9a 2021 if (cur_cm_id_priv) {
51e8463c 2022 ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0);
9315bc9a
HWR		 2023 cm_deref_id(cur_cm_id_priv);
2024 }
d998ccce 2025 return NULL;
a977049d
HR		 2026 }
2027
2028 /* Find matching listen request. */
91b60a71
JG		 2029 listen_cm_id_priv = cm_find_listen(
2030 cm_id_priv->id.device,
2031 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)));
a977049d 2032 if (!listen_cm_id_priv) {
9767a27e 2033 cm_remove_remote(cm_id_priv);
24be6e81 2034 spin_unlock_irq(&cm.lock);
a977049d
HR		 2035 cm_issue_rej(work->port, work->mad_recv_wc,
2036 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
2037 NULL, 0);
c206f8ba 2038 return NULL;
a977049d 2039 }
24be6e81 2040 spin_unlock_irq(&cm.lock);
a977049d 2041 return listen_cm_id_priv;
a977049d
HR		 2042}
2043
3971c9f6
SH		 2044/*
2045 * Work-around for inter-subnet connections. If the LIDs are permissive,
2046 * we need to override the LID/SL data in the REQ with the LID information
2047 * in the work completion.
2048 */
2049static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
2050{
b6bbee68 2051 if (!IBA_GET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg)) {
91b60a71
JG		 2052 if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID,
2053 req_msg)) == IB_LID_PERMISSIVE) {
2054 IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
2055 be16_to_cpu(ib_lid_be16(wc->slid)));
b6bbee68 2056 IBA_SET(CM_REQ_PRIMARY_SL, req_msg, wc->sl);
3971c9f6
SH		 2057 }
2058
91b60a71
JG		 2059 if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID,
2060 req_msg)) == IB_LID_PERMISSIVE)
2061 IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
2062 wc->dlid_path_bits);
3971c9f6
SH		 2063 }
2064
b6bbee68 2065 if (!IBA_GET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg)) {
91b60a71
JG		 2066 if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID,
2067 req_msg)) == IB_LID_PERMISSIVE) {
2068 IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
2069 be16_to_cpu(ib_lid_be16(wc->slid)));
b6bbee68 2070 IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, wc->sl);
3971c9f6
SH		 2071 }
2072
91b60a71
JG		 2073 if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID,
2074 req_msg)) == IB_LID_PERMISSIVE)
2075 IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
2076 wc->dlid_path_bits);
3971c9f6
SH		 2077 }
2078}
2079
a977049d
HR		 2080static int cm_req_handler(struct cm_work *work)
2081{
a977049d
HR		 2082 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
2083 struct cm_req_msg *req_msg;
d8966fcd 2084 const struct ib_global_route *grh;
a8872d53 2085 const struct ib_gid_attr *gid_attr;
a977049d
HR		 2086 int ret;
2087
2088 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
2089
c206f8ba
JG		 2090 cm_id_priv =
2091 cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL);
2092 if (IS_ERR(cm_id_priv))
2093 return PTR_ERR(cm_id_priv);
a977049d 2094
91b60a71
JG		 2095 cm_id_priv->id.remote_id =
2096 cpu_to_be32(IBA_GET(CM_REQ_LOCAL_COMM_ID, req_msg));
c206f8ba
JG		 2097 cm_id_priv->id.service_id =
2098 cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
c206f8ba
JG		 2099 cm_id_priv->tid = req_msg->hdr.tid;
2100 cm_id_priv->timeout_ms = cm_convert_to_ms(
2101 IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg));
2102 cm_id_priv->max_cm_retries = IBA_GET(CM_REQ_MAX_CM_RETRIES, req_msg);
2103 cm_id_priv->remote_qpn =
2104 cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg));
2105 cm_id_priv->initiator_depth =
2106 IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg);
2107 cm_id_priv->responder_resources =
2108 IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg);
2109 cm_id_priv->path_mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
2110 cm_id_priv->pkey = cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
2111 cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg));
2112 cm_id_priv->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg);
2113 cm_id_priv->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg);
2114 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
2115
0c4386ec
PP		 2116 ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
2117 work->mad_recv_wc->recv_buf.grh,
2118 &cm_id_priv->av);
2119 if (ret)
2120 goto destroy;
a977049d
HR		 2121 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
2122 id.local_id);
2123 if (IS_ERR(cm_id_priv->timewait_info)) {
2124 ret = PTR_ERR(cm_id_priv->timewait_info);
340b940e 2125 cm_id_priv->timewait_info = NULL;
76842405 2126 goto destroy;
a977049d 2127 }
c206f8ba 2128 cm_id_priv->timewait_info->work.remote_id = cm_id_priv->id.remote_id;
91b60a71
JG		 2129 cm_id_priv->timewait_info->remote_ca_guid =
2130 cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg));
c206f8ba
JG		 2131 cm_id_priv->timewait_info->remote_qpn = cm_id_priv->remote_qpn;
2132
2133 /*
2134 * Note that the ID pointer is not in the xarray at this point,
2135 * so this set is only visible to the local thread.
2136 */
2137 cm_id_priv->id.state = IB_CM_REQ_RCVD;
a977049d
HR		 2138
2139 listen_cm_id_priv = cm_match_req(work, cm_id_priv);
2140 if (!listen_cm_id_priv) {
75874b3d 2141 trace_icm_no_listener_err(&cm_id_priv->id);
c206f8ba 2142 cm_id_priv->id.state = IB_CM_IDLE;
a977049d 2143 ret = -EINVAL;
bede86a3 2144 goto destroy;
a977049d
HR		 2145 }
2146
9fdca4da 2147 memset(&work->path[0], 0, sizeof(work->path[0]));
5a3dc323
PP		 2148 if (cm_req_has_alt_path(req_msg))
2149 memset(&work->path[1], 0, sizeof(work->path[1]));
d8966fcd 2150 grh = rdma_ah_read_grh(&cm_id_priv->av.ah_attr);
a8872d53 2151 gid_attr = grh->sgid_attr;
16c72e40 2152
65d4801a 2153 if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE) {
16c72e40 2154 work->path[0].rec_type =
a8872d53 2155 sa_conv_gid_to_pathrec_type(gid_attr->gid_type);
16c72e40 2156 } else {
65d4801a 2157 cm_process_routed_req(req_msg, work->mad_recv_wc->wc);
4ca662a3
JG		 2158 cm_path_set_rec_type(
2159 work->port->cm_dev->ib_device, work->port->port_num,
2160 &work->path[0],
2161 IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID,
2162 req_msg));
16c72e40
PP		 2163 }
2164 if (cm_req_has_alt_path(req_msg))
2165 work->path[1].rec_type = work->path[0].rec_type;
2166 cm_format_paths_from_req(req_msg, &work->path[0],
b7d95040 2167 &work->path[1], work->mad_recv_wc->wc);
16c72e40
PP		 2168 if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE)
2169 sa_path_set_dmac(&work->path[0],
2170 cm_id_priv->av.ah_attr.roce.dmac);
2171 work->path[0].hop_limit = grh->hop_limit;
76039ac9
MZ		 2172
2173 /* This destroy call is needed to pair with cm_init_av_for_response */
2174 cm_destroy_av(&cm_id_priv->av);
3595c398 2175 ret = cm_init_av_by_path(&work->path[0], gid_attr, &cm_id_priv->av);
76842405 2176 if (ret) {
16c72e40
PP		 2177 int err;
2178
1dfce294
PP		 2179 err = rdma_query_gid(work->port->cm_dev->ib_device,
2180 work->port->port_num, 0,
2181 &work->path[0].sgid);
16c72e40 2182 if (err)
c206f8ba 2183 ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID,
16c72e40
PP		 2184 NULL, 0, NULL, 0);
2185 else
c206f8ba 2186 ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID,
16c72e40
PP		 2187 &work->path[0].sgid,
2188 sizeof(work->path[0].sgid),
2189 NULL, 0);
76842405
SH		 2190 goto rejected;
2191 }
eb8336db
MZ		 2192 if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_IB)
2193 cm_id_priv->av.dlid_datapath =
2194 IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg);
2195
6b3c0e6e 2196 if (cm_req_has_alt_path(req_msg)) {
39839107 2197 ret = cm_init_av_by_path(&work->path[1], NULL,
3595c398 2198 &cm_id_priv->alt_av);
76842405 2199 if (ret) {
c206f8ba
JG		 2200 ib_send_cm_rej(&cm_id_priv->id,
2201 IB_CM_REJ_INVALID_ALT_GID,
76842405 2202 &work->path[0].sgid,
16c72e40 2203 sizeof(work->path[0].sgid), NULL, 0);
76842405
SH		 2204 goto rejected;
2205 }
a977049d 2206 }
a977049d 2207
c206f8ba
JG		 2208 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
2209 cm_id_priv->id.context = listen_cm_id_priv->id.context;
a977049d 2210 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
c206f8ba
JG		 2211
2212 /* Now MAD handlers can see the new ID */
2213 spin_lock_irq(&cm_id_priv->lock);
2214 cm_finalize_id(cm_id_priv);
2215
2216 /* Refcount belongs to the event, pairs with cm_process_work() */
2217 refcount_inc(&cm_id_priv->refcount);
e83f195a 2218 cm_queue_work_unlock(cm_id_priv, work);
c206f8ba
JG		 2219 /*
2220 * Since this ID was just created and was not made visible to other MAD
2221 * handlers until the cm_finalize_id() above we know that the
2222 * cm_process_work() will deliver the event and the listen_cm_id
2223 * embedded in the event can be derefed here.
2224 */
a977049d
HR		 2225 cm_deref_id(listen_cm_id_priv);
2226 return 0;
2227
76842405 2228rejected:
a977049d 2229 cm_deref_id(listen_cm_id_priv);
76842405 2230destroy:
c206f8ba 2231 ib_destroy_cm_id(&cm_id_priv->id);
a977049d
HR		 2232 return ret;
2233}
2234
2235static void cm_format_rep(struct cm_rep_msg *rep_msg,
2236 struct cm_id_private *cm_id_priv,
2237 struct ib_cm_rep_param *param)
2238{
a20652e1
LR		 2239 cm_format_mad_ece_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid,
2240 param->ece.attr_mod);
91b60a71
JG		 2241 IBA_SET(CM_REP_LOCAL_COMM_ID, rep_msg,
2242 be32_to_cpu(cm_id_priv->id.local_id));
2243 IBA_SET(CM_REP_REMOTE_COMM_ID, rep_msg,
2244 be32_to_cpu(cm_id_priv->id.remote_id));
01adb7f4 2245 IBA_SET(CM_REP_STARTING_PSN, rep_msg, param->starting_psn);
91b60a71
JG		 2246 IBA_SET(CM_REP_RESPONDER_RESOURCES, rep_msg,
2247 param->responder_resources);
b6bbee68
JG		 2248 IBA_SET(CM_REP_TARGET_ACK_DELAY, rep_msg,
2249 cm_id_priv->av.port->cm_dev->ack_delay);
2250 IBA_SET(CM_REP_FAILOVER_ACCEPTED, rep_msg, param->failover_accepted);
2251 IBA_SET(CM_REP_RNR_RETRY_COUNT, rep_msg, param->rnr_retry_count);
91b60a71
JG		 2252 IBA_SET(CM_REP_LOCAL_CA_GUID, rep_msg,
2253 be64_to_cpu(cm_id_priv->id.device->node_guid));
a977049d 2254
d26a360b 2255 if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) {
91b60a71
JG		 2256 IBA_SET(CM_REP_INITIATOR_DEPTH, rep_msg,
2257 param->initiator_depth);
b6bbee68
JG		 2258 IBA_SET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg,
2259 param->flow_control);
2260 IBA_SET(CM_REP_SRQ, rep_msg, param->srq);
01adb7f4 2261 IBA_SET(CM_REP_LOCAL_QPN, rep_msg, param->qp_num);
d26a360b 2262 } else {
b6bbee68 2263 IBA_SET(CM_REP_SRQ, rep_msg, 1);
01adb7f4 2264 IBA_SET(CM_REP_LOCAL_EE_CONTEXT_NUMBER, rep_msg, param->qp_num);
d26a360b
SH		 2265 }
2266
a20652e1
LR		 2267 IBA_SET(CM_REP_VENDOR_ID_L, rep_msg, param->ece.vendor_id);
2268 IBA_SET(CM_REP_VENDOR_ID_M, rep_msg, param->ece.vendor_id >> 8);
2269 IBA_SET(CM_REP_VENDOR_ID_H, rep_msg, param->ece.vendor_id >> 16);
2270
a977049d 2271 if (param->private_data && param->private_data_len)
4ca662a3
JG		 2272 IBA_SET_MEM(CM_REP_PRIVATE_DATA, rep_msg, param->private_data,
2273 param->private_data_len);
a977049d
HR		 2274}
2275
2276int ib_send_cm_rep(struct ib_cm_id *cm_id,
2277 struct ib_cm_rep_param *param)
2278{
2279 struct cm_id_private *cm_id_priv;
2280 struct ib_mad_send_buf *msg;
2281 struct cm_rep_msg *rep_msg;
a977049d
HR		 2282 unsigned long flags;
2283 int ret;
2284
2285 if (param->private_data &&
2286 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
2287 return -EINVAL;
2288
2289 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2290 spin_lock_irqsave(&cm_id_priv->lock, flags);
2291 if (cm_id->state != IB_CM_REQ_RCVD &&
2292 cm_id->state != IB_CM_MRA_REQ_SENT) {
75874b3d 2293 trace_icm_send_rep_err(cm_id_priv->id.local_id, cm_id->state);
a977049d
HR		 2294 ret = -EINVAL;
2295 goto out;
2296 }
2297
1e515921 2298 msg = cm_alloc_priv_msg(cm_id_priv, IB_CM_REP_SENT);
4b4e586e
JG		 2299 if (IS_ERR(msg)) {
2300 ret = PTR_ERR(msg);
a977049d 2301 goto out;
4b4e586e 2302 }
a977049d
HR		 2303
2304 rep_msg = (struct cm_rep_msg *) msg->mad;
2305 cm_format_rep(rep_msg, cm_id_priv, param);
a977049d 2306
8dc105be 2307 trace_icm_send_rep(cm_id);
34816ad9 2308 ret = ib_post_send_mad(msg, NULL);
4b4e586e
JG		 2309 if (ret)
2310 goto out_free;
a977049d
HR		 2311
2312 cm_id->state = IB_CM_REP_SENT;
a977049d
HR		 2313 cm_id_priv->initiator_depth = param->initiator_depth;
2314 cm_id_priv->responder_resources = param->responder_resources;
01adb7f4 2315 cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg));
ca750d4a
LR		 2316 WARN_ONCE(param->qp_num & 0xFF000000,
2317 "IBTA declares QPN to be 24 bits, but it is 0x%X\n",
2318 param->qp_num);
ef700446 2319 cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF);
4b4e586e
JG		 2320 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2321 return 0;
a977049d 2322
4b4e586e
JG		 2323out_free:
2324 cm_free_priv_msg(msg);
2325out:
2326 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 2327 return ret;
2328}
2329EXPORT_SYMBOL(ib_send_cm_rep);
2330
2331static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
2332 struct cm_id_private *cm_id_priv,
2333 const void *private_data,
2334 u8 private_data_len)
2335{
2336 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
91b60a71
JG		 2337 IBA_SET(CM_RTU_LOCAL_COMM_ID, rtu_msg,
2338 be32_to_cpu(cm_id_priv->id.local_id));
2339 IBA_SET(CM_RTU_REMOTE_COMM_ID, rtu_msg,
2340 be32_to_cpu(cm_id_priv->id.remote_id));
a977049d
HR		 2341
2342 if (private_data && private_data_len)
4ca662a3
JG		 2343 IBA_SET_MEM(CM_RTU_PRIVATE_DATA, rtu_msg, private_data,
2344 private_data_len);
a977049d
HR		 2345}
2346
2347int ib_send_cm_rtu(struct ib_cm_id *cm_id,
2348 const void *private_data,
2349 u8 private_data_len)
2350{
2351 struct cm_id_private *cm_id_priv;
2352 struct ib_mad_send_buf *msg;
a977049d
HR		 2353 unsigned long flags;
2354 void *data;
2355 int ret;
2356
2357 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
2358 return -EINVAL;
2359
2360 data = cm_copy_private_data(private_data, private_data_len);
2361 if (IS_ERR(data))
2362 return PTR_ERR(data);
2363
2364 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
2365 spin_lock_irqsave(&cm_id_priv->lock, flags);
2366 if (cm_id->state != IB_CM_REP_RCVD &&
2367 cm_id->state != IB_CM_MRA_REP_SENT) {
75874b3d 2368 trace_icm_send_cm_rtu_err(cm_id);
a977049d
HR		 2369 ret = -EINVAL;
2370 goto error;
2371 }
2372
4b4e586e
JG		 2373 msg = cm_alloc_msg(cm_id_priv);
2374 if (IS_ERR(msg)) {
2375 ret = PTR_ERR(msg);
a977049d 2376 goto error;
4b4e586e 2377 }
a977049d
HR		 2378
2379 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
2380 private_data, private_data_len);
2381
8dc105be 2382 trace_icm_send_rtu(cm_id);
34816ad9 2383 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2384 if (ret) {
2385 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2386 cm_free_msg(msg);
2387 kfree(data);
2388 return ret;
2389 }
2390
2391 cm_id->state = IB_CM_ESTABLISHED;
2392 cm_set_private_data(cm_id_priv, data, private_data_len);
2393 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2394 return 0;
2395
2396error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
2397 kfree(data);
2398 return ret;
2399}
2400EXPORT_SYMBOL(ib_send_cm_rtu);
2401
ef700446 2402static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type)
a977049d
HR		 2403{
2404 struct cm_rep_msg *rep_msg;
2405 struct ib_cm_rep_event_param *param;
2406
2407 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
2408 param = &work->cm_event.param.rep_rcvd;
91b60a71
JG		 2409 param->remote_ca_guid =
2410 cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg));
2411 param->remote_qkey = IBA_GET(CM_REP_LOCAL_Q_KEY, rep_msg);
ef700446 2412 param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type));
01adb7f4 2413 param->starting_psn = IBA_GET(CM_REP_STARTING_PSN, rep_msg);
91b60a71
JG		 2414 param->responder_resources = IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg);
2415 param->initiator_depth = IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg);
b6bbee68
JG		 2416 param->target_ack_delay = IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg);
2417 param->failover_accepted = IBA_GET(CM_REP_FAILOVER_ACCEPTED, rep_msg);
2418 param->flow_control = IBA_GET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg);
2419 param->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg);
2420 param->srq = IBA_GET(CM_REP_SRQ, rep_msg);
a20652e1
LR		 2421 param->ece.vendor_id = IBA_GET(CM_REP_VENDOR_ID_H, rep_msg) << 16;
2422 param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_M, rep_msg) << 8;
2423 param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_L, rep_msg);
2424 param->ece.attr_mod = be32_to_cpu(rep_msg->hdr.attr_mod);
2425
4ca662a3
JG		 2426 work->cm_event.private_data =
2427 IBA_GET_MEM_PTR(CM_REP_PRIVATE_DATA, rep_msg);
a977049d
HR		 2428}
2429
2430static void cm_dup_rep_handler(struct cm_work *work)
2431{
2432 struct cm_id_private *cm_id_priv;
2433 struct cm_rep_msg *rep_msg;
2434 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2435 int ret;
2436
2437 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
91b60a71
JG		 2438 cm_id_priv = cm_acquire_id(
2439 cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)),
2440 cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg)));
a977049d
HR		 2441 if (!cm_id_priv)
2442 return;
2443
526a12c8
JG		 2444 atomic_long_inc(
2445 &work->port->counters[CM_RECV_DUPLICATES][CM_REP_COUNTER]);
04924587 2446 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, true, &msg);
a977049d
HR		 2447 if (ret)
2448 goto deref;
2449
24be6e81 2450 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2451 if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
2452 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
2453 cm_id_priv->private_data,
2454 cm_id_priv->private_data_len);
2455 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
2456 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
45611fe8 2457 CM_MSG_RESPONSE_REP,
a977049d
HR		 2458 cm_id_priv->private_data,
2459 cm_id_priv->private_data_len);
2460 else
2461 goto unlock;
24be6e81 2462 spin_unlock_irq(&cm_id_priv->lock);
a977049d 2463
8dc105be 2464 trace_icm_send_dup_rep(&cm_id_priv->id);
34816ad9 2465 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2466 if (ret)
2467 goto free;
2468 goto deref;
2469
24be6e81 2470unlock: spin_unlock_irq(&cm_id_priv->lock);
1e515921 2471free: cm_free_msg(msg);
a977049d
HR		 2472deref: cm_deref_id(cm_id_priv);
2473}
2474
2475static int cm_rep_handler(struct cm_work *work)
2476{
2477 struct cm_id_private *cm_id_priv;
2478 struct cm_rep_msg *rep_msg;
a977049d 2479 int ret;
9315bc9a 2480 struct cm_id_private *cur_cm_id_priv;
9315bc9a 2481 struct cm_timewait_info *timewait_info;
a977049d
HR		 2482
2483 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
91b60a71
JG		 2484 cm_id_priv = cm_acquire_id(
2485 cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)), 0);
a977049d
HR		 2486 if (!cm_id_priv) {
2487 cm_dup_rep_handler(work);
75874b3d 2488 trace_icm_remote_no_priv_err(
91b60a71 2489 IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
a977049d
HR		 2490 return -EINVAL;
2491 }
2492
ef700446 2493 cm_format_rep_event(work, cm_id_priv->qp_type);
87fd1a11 2494
24be6e81 2495 spin_lock_irq(&cm_id_priv->lock);
87fd1a11
SH		 2496 switch (cm_id_priv->id.state) {
2497 case IB_CM_REQ_SENT:
2498 case IB_CM_MRA_REQ_RCVD:
2499 break;
2500 default:
87fd1a11 2501 ret = -EINVAL;
75874b3d 2502 trace_icm_rep_unknown_err(
91b60a71 2503 IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg),
75874b3d
CL		 2504 IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg),
2505 cm_id_priv->id.state);
153a2e43 2506 spin_unlock_irq(&cm_id_priv->lock);
87fd1a11
SH		 2507 goto error;
2508 }
2509
91b60a71
JG		 2510 cm_id_priv->timewait_info->work.remote_id =
2511 cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg));
2512 cm_id_priv->timewait_info->remote_ca_guid =
2513 cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg));
ef700446 2514 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
a977049d 2515
87fd1a11 2516 spin_lock(&cm.lock);
a977049d
HR		 2517 /* Check for duplicate REP. */
2518 if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
87fd1a11 2519 spin_unlock(&cm.lock);
24be6e81 2520 spin_unlock_irq(&cm_id_priv->lock);
a977049d 2521 ret = -EINVAL;
75874b3d 2522 trace_icm_insert_failed_err(
91b60a71 2523 IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
a977049d
HR		 2524 goto error;
2525 }
2526 /* Check for a stale connection. */
9315bc9a
HWR		 2527 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
2528 if (timewait_info) {
9767a27e 2529 cm_remove_remote(cm_id_priv);
4d6e8a03 2530 cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
9315bc9a
HWR		 2531 timewait_info->work.remote_id);
2532
87fd1a11 2533 spin_unlock(&cm.lock);
24be6e81 2534 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2535 cm_issue_rej(work->port, work->mad_recv_wc,
2536 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
2537 NULL, 0);
2538 ret = -EINVAL;
75874b3d
CL		 2539 trace_icm_staleconn_err(
2540 IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg),
91b60a71 2541 IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
119bf817 2542
9315bc9a 2543 if (cur_cm_id_priv) {
51e8463c 2544 ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0);
9315bc9a
HWR		 2545 cm_deref_id(cur_cm_id_priv);
2546 }
2547
a977049d
HR		 2548 goto error;
2549 }
87fd1a11 2550 spin_unlock(&cm.lock);
a977049d 2551
a977049d 2552 cm_id_priv->id.state = IB_CM_REP_RCVD;
91b60a71
JG		 2553 cm_id_priv->id.remote_id =
2554 cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg));
ef700446 2555 cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
91b60a71
JG		 2556 cm_id_priv->initiator_depth =
2557 IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg);
2558 cm_id_priv->responder_resources =
2559 IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg);
01adb7f4 2560 cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg));
b6bbee68
JG		 2561 cm_id_priv->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg);
2562 cm_id_priv->target_ack_delay =
2563 IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg);
1d846126
SH		 2564 cm_id_priv->av.timeout =
2565 cm_ack_timeout(cm_id_priv->target_ack_delay,
2566 cm_id_priv->av.timeout - 1);
2567 cm_id_priv->alt_av.timeout =
2568 cm_ack_timeout(cm_id_priv->target_ack_delay,
2569 cm_id_priv->alt_av.timeout - 1);
a977049d 2570
70076a41 2571 ib_cancel_mad(cm_id_priv->msg);
e83f195a 2572 cm_queue_work_unlock(cm_id_priv, work);
a977049d
HR		 2573 return 0;
2574
87fd1a11 2575error:
a977049d
HR		 2576 cm_deref_id(cm_id_priv);
2577 return ret;
2578}
2579
2580static int cm_establish_handler(struct cm_work *work)
2581{
2582 struct cm_id_private *cm_id_priv;
a977049d 2583
e1444b5a 2584 /* See comment in cm_establish about lookup. */
a977049d
HR		 2585 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
2586 if (!cm_id_priv)
2587 return -EINVAL;
2588
24be6e81 2589 spin_lock_irq(&cm_id_priv->lock);
a977049d 2590 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
24be6e81 2591 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2592 goto out;
2593 }
2594
70076a41 2595 ib_cancel_mad(cm_id_priv->msg);
e83f195a 2596 cm_queue_work_unlock(cm_id_priv, work);
a977049d
HR		 2597 return 0;
2598out:
2599 cm_deref_id(cm_id_priv);
2600 return -EINVAL;
2601}
2602
2603static int cm_rtu_handler(struct cm_work *work)
2604{
2605 struct cm_id_private *cm_id_priv;
2606 struct cm_rtu_msg *rtu_msg;
a977049d
HR		 2607
2608 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
91b60a71
JG		 2609 cm_id_priv = cm_acquire_id(
2610 cpu_to_be32(IBA_GET(CM_RTU_REMOTE_COMM_ID, rtu_msg)),
2611 cpu_to_be32(IBA_GET(CM_RTU_LOCAL_COMM_ID, rtu_msg)));
a977049d
HR		 2612 if (!cm_id_priv)
2613 return -EINVAL;
2614
4ca662a3
JG		 2615 work->cm_event.private_data =
2616 IBA_GET_MEM_PTR(CM_RTU_PRIVATE_DATA, rtu_msg);
a977049d 2617
24be6e81 2618 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2619 if (cm_id_priv->id.state != IB_CM_REP_SENT &&
2620 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
24be6e81 2621 spin_unlock_irq(&cm_id_priv->lock);
526a12c8
JG		 2622 atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
2623 [CM_RTU_COUNTER]);
a977049d
HR		 2624 goto out;
2625 }
2626 cm_id_priv->id.state = IB_CM_ESTABLISHED;
2627
70076a41 2628 ib_cancel_mad(cm_id_priv->msg);
e83f195a 2629 cm_queue_work_unlock(cm_id_priv, work);
a977049d
HR		 2630 return 0;
2631out:
2632 cm_deref_id(cm_id_priv);
2633 return -EINVAL;
2634}
2635
2636static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
2637 struct cm_id_private *cm_id_priv,
2638 const void *private_data,
2639 u8 private_data_len)
2640{
2641 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
87a37ce9 2642 cm_form_tid(cm_id_priv));
91b60a71
JG		 2643 IBA_SET(CM_DREQ_LOCAL_COMM_ID, dreq_msg,
2644 be32_to_cpu(cm_id_priv->id.local_id));
2645 IBA_SET(CM_DREQ_REMOTE_COMM_ID, dreq_msg,
2646 be32_to_cpu(cm_id_priv->id.remote_id));
01adb7f4
JG		 2647 IBA_SET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg,
2648 be32_to_cpu(cm_id_priv->remote_qpn));
a977049d
HR		 2649
2650 if (private_data && private_data_len)
4ca662a3
JG		 2651 IBA_SET_MEM(CM_DREQ_PRIVATE_DATA, dreq_msg, private_data,
2652 private_data_len);
a977049d
HR		 2653}
2654
fc0856c3 2655static void cm_issue_dreq(struct cm_id_private *cm_id_priv)
a977049d 2656{
a977049d 2657 struct ib_mad_send_buf *msg;
a977049d
HR		 2658 int ret;
2659
e029fdc0
JG		 2660 lockdep_assert_held(&cm_id_priv->lock);
2661
fc0856c3
SH		 2662 msg = cm_alloc_msg(cm_id_priv);
2663 if (IS_ERR(msg))
2664 return;
2665
2666 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, NULL, 0);
2667
2668 trace_icm_send_dreq(&cm_id_priv->id);
2669 ret = ib_post_send_mad(msg, NULL);
2670 if (ret)
2671 cm_free_msg(msg);
2672}
2673
2674int ib_send_cm_dreq(struct ib_cm_id *cm_id, const void *private_data,
2675 u8 private_data_len)
2676{
2677 struct cm_id_private *cm_id_priv =
2678 container_of(cm_id, struct cm_id_private, id);
2679 struct ib_mad_send_buf *msg;
2680 unsigned long flags;
2681 int ret;
2682
a977049d
HR		 2683 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
2684 return -EINVAL;
2685
fc0856c3 2686 spin_lock_irqsave(&cm_id_priv->lock, flags);
e029fdc0 2687 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
75874b3d 2688 trace_icm_dreq_skipped(&cm_id_priv->id);
fc0856c3
SH		 2689 ret = -EINVAL;
2690 goto unlock;
a977049d
HR		 2691 }
2692
e029fdc0
JG		 2693 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
2694 cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
70076a41 2695 ib_cancel_mad(cm_id_priv->msg);
8d8ac865 2696
1e515921 2697 msg = cm_alloc_priv_msg(cm_id_priv, IB_CM_DREQ_SENT);
4b4e586e 2698 if (IS_ERR(msg)) {
a977049d 2699 cm_enter_timewait(cm_id_priv);
fc0856c3
SH		 2700 ret = PTR_ERR(msg);
2701 goto unlock;
a977049d
HR		 2702 }
2703
2704 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
2705 private_data, private_data_len);
a977049d 2706
8dc105be 2707 trace_icm_send_dreq(&cm_id_priv->id);
34816ad9 2708 ret = ib_post_send_mad(msg, NULL);
a977049d
HR		 2709 if (ret) {
2710 cm_enter_timewait(cm_id_priv);
4b4e586e 2711 cm_free_priv_msg(msg);
fc0856c3 2712 goto unlock;
a977049d
HR		 2713 }
2714
e029fdc0 2715 cm_id_priv->id.state = IB_CM_DREQ_SENT;
fc0856c3 2716unlock:
e029fdc0 2717 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 2718 return ret;
2719}
2720EXPORT_SYMBOL(ib_send_cm_dreq);
2721
2722static void cm_format_drep(struct cm_drep_msg *drep_msg,
2723 struct cm_id_private *cm_id_priv,
2724 const void *private_data,
2725 u8 private_data_len)
2726{
2727 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
91b60a71
JG		 2728 IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg,
2729 be32_to_cpu(cm_id_priv->id.local_id));
2730 IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg,
2731 be32_to_cpu(cm_id_priv->id.remote_id));
a977049d
HR		 2732
2733 if (private_data && private_data_len)
4ca662a3
JG		 2734 IBA_SET_MEM(CM_DREP_PRIVATE_DATA, drep_msg, private_data,
2735 private_data_len);
a977049d
HR		 2736}
2737
87cabf3e
JG		 2738static int cm_send_drep_locked(struct cm_id_private *cm_id_priv,
2739 void *private_data, u8 private_data_len)
a977049d 2740{
a977049d 2741 struct ib_mad_send_buf *msg;
a977049d
HR		 2742 int ret;
2743
87cabf3e
JG		 2744 lockdep_assert_held(&cm_id_priv->lock);
2745
a977049d
HR		 2746 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
2747 return -EINVAL;
2748
87cabf3e 2749 if (cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
75874b3d 2750 trace_icm_send_drep_err(&cm_id_priv->id);
87cabf3e 2751 kfree(private_data);
a977049d
HR		 2752 return -EINVAL;
2753 }
2754
87cabf3e 2755 cm_set_private_data(cm_id_priv, private_data, private_data_len);
a977049d
HR		 2756 cm_enter_timewait(cm_id_priv);
2757
4b4e586e
JG		 2758 msg = cm_alloc_msg(cm_id_priv);
2759 if (IS_ERR(msg))
2760 return PTR_ERR(msg);
a977049d
HR		 2761
2762 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2763 private_data, private_data_len);
2764
8dc105be 2765 trace_icm_send_drep(&cm_id_priv->id);
34816ad9 2766 ret = ib_post_send_mad(msg, NULL);
a977049d 2767 if (ret) {
a977049d
HR		 2768 cm_free_msg(msg);
2769 return ret;
2770 }
87cabf3e
JG		 2771 return 0;
2772}
a977049d 2773
87cabf3e
JG		 2774int ib_send_cm_drep(struct ib_cm_id *cm_id, const void *private_data,
2775 u8 private_data_len)
2776{
2777 struct cm_id_private *cm_id_priv =
2778 container_of(cm_id, struct cm_id_private, id);
2779 unsigned long flags;
2780 void *data;
2781 int ret;
2782
2783 data = cm_copy_private_data(private_data, private_data_len);
2784 if (IS_ERR(data))
2785 return PTR_ERR(data);
2786
2787 spin_lock_irqsave(&cm_id_priv->lock, flags);
2788 ret = cm_send_drep_locked(cm_id_priv, data, private_data_len);
2789 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 2790 return ret;
2791}
2792EXPORT_SYMBOL(ib_send_cm_drep);
2793
82a9c16a
SH		 2794static int cm_issue_drep(struct cm_port *port,
2795 struct ib_mad_recv_wc *mad_recv_wc)
2796{
2797 struct ib_mad_send_buf *msg = NULL;
2798 struct cm_dreq_msg *dreq_msg;
2799 struct cm_drep_msg *drep_msg;
2800 int ret;
2801
04924587 2802 ret = cm_alloc_response_msg(port, mad_recv_wc, true, &msg);
82a9c16a
SH		 2803 if (ret)
2804 return ret;
2805
2806 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
2807 drep_msg = (struct cm_drep_msg *) msg->mad;
2808
2809 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
91b60a71
JG		 2810 IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg,
2811 IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg));
2812 IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg,
2813 IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
82a9c16a 2814
8dc105be
CL		 2815 trace_icm_issue_drep(
2816 IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg),
2817 IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
82a9c16a
SH		 2818 ret = ib_post_send_mad(msg, NULL);
2819 if (ret)
1e515921 2820 cm_free_msg(msg);
82a9c16a
SH		 2821
2822 return ret;
2823}
2824
a977049d
HR		 2825static int cm_dreq_handler(struct cm_work *work)
2826{
2827 struct cm_id_private *cm_id_priv;
2828 struct cm_dreq_msg *dreq_msg;
2829 struct ib_mad_send_buf *msg = NULL;
a977049d
HR		 2830
2831 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
91b60a71
JG		 2832 cm_id_priv = cm_acquire_id(
2833 cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)),
2834 cpu_to_be32(IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg)));
82a9c16a 2835 if (!cm_id_priv) {
526a12c8
JG		 2836 atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
2837 [CM_DREQ_COUNTER]);
82a9c16a 2838 cm_issue_drep(work->port, work->mad_recv_wc);
75874b3d
CL		 2839 trace_icm_no_priv_err(
2840 IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg),
91b60a71 2841 IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
a977049d 2842 return -EINVAL;
82a9c16a 2843 }
a977049d 2844
4ca662a3
JG		 2845 work->cm_event.private_data =
2846 IBA_GET_MEM_PTR(CM_DREQ_PRIVATE_DATA, dreq_msg);
a977049d 2847
24be6e81 2848 spin_lock_irq(&cm_id_priv->lock);
01adb7f4
JG		 2849 if (cm_id_priv->local_qpn !=
2850 cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg)))
a977049d
HR		 2851 goto unlock;
2852
2853 switch (cm_id_priv->id.state) {
2854 case IB_CM_REP_SENT:
2855 case IB_CM_DREQ_SENT:
107dd7be 2856 case IB_CM_MRA_REP_RCVD:
70076a41 2857 ib_cancel_mad(cm_id_priv->msg);
a977049d
HR		 2858 break;
2859 case IB_CM_ESTABLISHED:
8d8ac865
SH		 2860 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
2861 cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
70076a41 2862 ib_cancel_mad(cm_id_priv->msg);
8d8ac865 2863 break;
a977049d 2864 case IB_CM_TIMEWAIT:
526a12c8
JG		 2865 atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
2866 [CM_DREQ_COUNTER]);
04924587
SH		 2867 msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc,
2868 true);
c7616118 2869 if (IS_ERR(msg))
a977049d
HR		 2870 goto unlock;
2871
2872 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
2873 cm_id_priv->private_data,
2874 cm_id_priv->private_data_len);
24be6e81 2875 spin_unlock_irq(&cm_id_priv->lock);
a977049d 2876
c7616118
RD		 2877 if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) ||
2878 ib_post_send_mad(msg, NULL))
1e515921 2879 cm_free_msg(msg);
a977049d 2880 goto deref;
9af57b7a 2881 case IB_CM_DREQ_RCVD:
526a12c8
JG		 2882 atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
2883 [CM_DREQ_COUNTER]);
9af57b7a 2884 goto unlock;
a977049d 2885 default:
75874b3d 2886 trace_icm_dreq_unknown_err(&cm_id_priv->id);
a977049d
HR		 2887 goto unlock;
2888 }
2889 cm_id_priv->id.state = IB_CM_DREQ_RCVD;
2890 cm_id_priv->tid = dreq_msg->hdr.tid;
e83f195a 2891 cm_queue_work_unlock(cm_id_priv, work);
a977049d
HR		 2892 return 0;
2893
24be6e81 2894unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2895deref: cm_deref_id(cm_id_priv);
2896 return -EINVAL;
2897}
2898
2899static int cm_drep_handler(struct cm_work *work)
2900{
2901 struct cm_id_private *cm_id_priv;
2902 struct cm_drep_msg *drep_msg;
a977049d
HR		 2903
2904 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
91b60a71
JG		 2905 cm_id_priv = cm_acquire_id(
2906 cpu_to_be32(IBA_GET(CM_DREP_REMOTE_COMM_ID, drep_msg)),
2907 cpu_to_be32(IBA_GET(CM_DREP_LOCAL_COMM_ID, drep_msg)));
a977049d
HR		 2908 if (!cm_id_priv)
2909 return -EINVAL;
2910
4ca662a3
JG		 2911 work->cm_event.private_data =
2912 IBA_GET_MEM_PTR(CM_DREP_PRIVATE_DATA, drep_msg);
a977049d 2913
24be6e81 2914 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 2915 if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
2916 cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
24be6e81 2917 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 2918 goto out;
2919 }
2920 cm_enter_timewait(cm_id_priv);
2921
70076a41 2922 ib_cancel_mad(cm_id_priv->msg);
e83f195a 2923 cm_queue_work_unlock(cm_id_priv, work);
a977049d
HR		 2924 return 0;
2925out:
2926 cm_deref_id(cm_id_priv);
2927 return -EINVAL;
2928}
2929
81ddb41f
JG		 2930static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
2931 enum ib_cm_rej_reason reason, void *ari,
2932 u8 ari_length, const void *private_data,
2933 u8 private_data_len)
a977049d 2934{
0c6949c3 2935 enum ib_cm_state state = cm_id_priv->id.state;
a977049d 2936 struct ib_mad_send_buf *msg;
a977049d
HR		 2937 int ret;
2938
81ddb41f
JG		 2939 lockdep_assert_held(&cm_id_priv->lock);
2940
a977049d
HR		 2941 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
2942 (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
2943 return -EINVAL;
2944
bd9de1ba
MZ		 2945 trace_icm_send_rej(&cm_id_priv->id, reason);
2946
0c6949c3 2947 switch (state) {
a977049d
HR		 2948 case IB_CM_REQ_SENT:
2949 case IB_CM_MRA_REQ_RCVD:
2950 case IB_CM_REQ_RCVD:
2951 case IB_CM_MRA_REQ_SENT:
2952 case IB_CM_REP_RCVD:
2953 case IB_CM_MRA_REP_SENT:
a977049d 2954 cm_reset_to_idle(cm_id_priv);
4b4e586e
JG		 2955 msg = cm_alloc_msg(cm_id_priv);
2956 if (IS_ERR(msg))
2957 return PTR_ERR(msg);
81ddb41f 2958 cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason,
0c6949c3
LR		 2959 ari, ari_length, private_data, private_data_len,
2960 state);
a977049d
HR		 2961 break;
2962 case IB_CM_REP_SENT:
2963 case IB_CM_MRA_REP_RCVD:
a977049d 2964 cm_enter_timewait(cm_id_priv);
4b4e586e
JG		 2965 msg = cm_alloc_msg(cm_id_priv);
2966 if (IS_ERR(msg))
2967 return PTR_ERR(msg);
81ddb41f 2968 cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason,
0c6949c3
LR		 2969 ari, ari_length, private_data, private_data_len,
2970 state);
a977049d
HR		 2971 break;
2972 default:
75874b3d 2973 trace_icm_send_unknown_rej_err(&cm_id_priv->id);
81ddb41f 2974 return -EINVAL;
a977049d
HR		 2975 }
2976
34816ad9 2977 ret = ib_post_send_mad(msg, NULL);
81ddb41f 2978 if (ret) {
a977049d 2979 cm_free_msg(msg);
81ddb41f
JG		 2980 return ret;
2981 }
a977049d 2982
81ddb41f
JG		 2983 return 0;
2984}
2985
2986int ib_send_cm_rej(struct ib_cm_id *cm_id, enum ib_cm_rej_reason reason,
2987 void *ari, u8 ari_length, const void *private_data,
2988 u8 private_data_len)
2989{
2990 struct cm_id_private *cm_id_priv =
2991 container_of(cm_id, struct cm_id_private, id);
2992 unsigned long flags;
2993 int ret;
2994
2995 spin_lock_irqsave(&cm_id_priv->lock, flags);
2996 ret = cm_send_rej_locked(cm_id_priv, reason, ari, ari_length,
2997 private_data, private_data_len);
2998 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 2999 return ret;
3000}
3001EXPORT_SYMBOL(ib_send_cm_rej);
3002
3003static void cm_format_rej_event(struct cm_work *work)
3004{
3005 struct cm_rej_msg *rej_msg;
3006 struct ib_cm_rej_event_param *param;
3007
3008 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
3009 param = &work->cm_event.param.rej_rcvd;
4ca662a3 3010 param->ari = IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg);
b6bbee68 3011 param->ari_length = IBA_GET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg);
91b60a71 3012 param->reason = IBA_GET(CM_REJ_REASON, rej_msg);
4ca662a3
JG		 3013 work->cm_event.private_data =
3014 IBA_GET_MEM_PTR(CM_REJ_PRIVATE_DATA, rej_msg);
a977049d
HR		 3015}
3016
f681967a 3017static struct cm_id_private *cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
a977049d 3018{
a977049d 3019 struct cm_id_private *cm_id_priv;
97f52eb4 3020 __be32 remote_id;
a977049d 3021
91b60a71 3022 remote_id = cpu_to_be32(IBA_GET(CM_REJ_LOCAL_COMM_ID, rej_msg));
a977049d 3023
91b60a71 3024 if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_TIMEOUT) {
cfa68b0d 3025 cm_id_priv = cm_find_remote_id(
4ca662a3
JG		 3026 *((__be64 *)IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg)),
3027 remote_id);
b6bbee68
JG		 3028 } else if (IBA_GET(CM_REJ_MESSAGE_REJECTED, rej_msg) ==
3029 CM_MSG_RESPONSE_REQ)
91b60a71
JG		 3030 cm_id_priv = cm_acquire_id(
3031 cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)),
3032 0);
a977049d 3033 else
91b60a71
JG		 3034 cm_id_priv = cm_acquire_id(
3035 cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)),
3036 remote_id);
a977049d
HR		 3037
3038 return cm_id_priv;
3039}
3040
3041static int cm_rej_handler(struct cm_work *work)
3042{
3043 struct cm_id_private *cm_id_priv;
3044 struct cm_rej_msg *rej_msg;
a977049d
HR		 3045
3046 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
3047 cm_id_priv = cm_acquire_rejected_id(rej_msg);
3048 if (!cm_id_priv)
3049 return -EINVAL;
3050
3051 cm_format_rej_event(work);
3052
24be6e81 3053 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 3054 switch (cm_id_priv->id.state) {
3055 case IB_CM_REQ_SENT:
3056 case IB_CM_MRA_REQ_RCVD:
3057 case IB_CM_REP_SENT:
3058 case IB_CM_MRA_REP_RCVD:
70076a41 3059 ib_cancel_mad(cm_id_priv->msg);
df561f66 3060 fallthrough;
a977049d
HR		 3061 case IB_CM_REQ_RCVD:
3062 case IB_CM_MRA_REQ_SENT:
91b60a71 3063 if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_STALE_CONN)
a977049d
HR		 3064 cm_enter_timewait(cm_id_priv);
3065 else
3066 cm_reset_to_idle(cm_id_priv);
3067 break;
3068 case IB_CM_DREQ_SENT:
70076a41 3069 ib_cancel_mad(cm_id_priv->msg);
df561f66 3070 fallthrough;
a977049d
HR		 3071 case IB_CM_REP_RCVD:
3072 case IB_CM_MRA_REP_SENT:
a977049d
HR		 3073 cm_enter_timewait(cm_id_priv);
3074 break;
8d8ac865
SH		 3075 case IB_CM_ESTABLISHED:
3076 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT ||
3077 cm_id_priv->id.lap_state == IB_CM_LAP_SENT) {
3078 if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT)
70076a41 3079 ib_cancel_mad(cm_id_priv->msg);
8d8ac865
SH		 3080 cm_enter_timewait(cm_id_priv);
3081 break;
3082 }
df561f66 3083 fallthrough;
a977049d 3084 default:
75874b3d 3085 trace_icm_rej_unknown_err(&cm_id_priv->id);
153a2e43 3086 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3087 goto out;
3088 }
3089
e83f195a 3090 cm_queue_work_unlock(cm_id_priv, work);
a977049d
HR		 3091 return 0;
3092out:
3093 cm_deref_id(cm_id_priv);
3094 return -EINVAL;
3095}
3096
45611fe8 3097int ib_prepare_cm_mra(struct ib_cm_id *cm_id)
a977049d
HR		 3098{
3099 struct cm_id_private *cm_id_priv;
de98b693
SH		 3100 enum ib_cm_state cm_state;
3101 enum ib_cm_lap_state lap_state;
a977049d 3102 unsigned long flags;
45611fe8 3103 int ret = 0;
a977049d
HR		 3104
3105 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3106
3107 spin_lock_irqsave(&cm_id_priv->lock, flags);
9516b8f9 3108 switch (cm_id_priv->id.state) {
a977049d 3109 case IB_CM_REQ_RCVD:
de98b693
SH		 3110 cm_state = IB_CM_MRA_REQ_SENT;
3111 lap_state = cm_id->lap_state;
a977049d
HR		 3112 break;
3113 case IB_CM_REP_RCVD:
de98b693
SH		 3114 cm_state = IB_CM_MRA_REP_SENT;
3115 lap_state = cm_id->lap_state;
a977049d
HR		 3116 break;
3117 case IB_CM_ESTABLISHED:
50a025c6
SH		 3118 if (cm_id->lap_state == IB_CM_LAP_RCVD) {
3119 cm_state = cm_id->state;
3120 lap_state = IB_CM_MRA_LAP_SENT;
50a025c6
SH		 3121 break;
3122 }
df561f66 3123 fallthrough;
de98b693 3124 default:
45611fe8 3125 trace_icm_prepare_mra_unknown_err(&cm_id_priv->id);
de98b693 3126 ret = -EINVAL;
4b4e586e 3127 goto error_unlock;
de98b693
SH		 3128 }
3129
de98b693
SH		 3130 cm_id->state = cm_state;
3131 cm_id->lap_state = lap_state;
45611fe8 3132 cm_set_private_data(cm_id_priv, NULL, 0);
a977049d 3133
4b4e586e
JG		 3134error_unlock:
3135 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 3136 return ret;
3137}
45611fe8 3138EXPORT_SYMBOL(ib_prepare_cm_mra);
a977049d 3139
f681967a 3140static struct cm_id_private *cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
a977049d 3141{
b6bbee68 3142 switch (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg)) {
a977049d 3143 case CM_MSG_RESPONSE_REQ:
91b60a71
JG		 3144 return cm_acquire_id(
3145 cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)),
3146 0);
a977049d
HR		 3147 case CM_MSG_RESPONSE_REP:
3148 case CM_MSG_RESPONSE_OTHER:
91b60a71
JG		 3149 return cm_acquire_id(
3150 cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)),
3151 cpu_to_be32(IBA_GET(CM_MRA_LOCAL_COMM_ID, mra_msg)));
a977049d
HR		 3152 default:
3153 return NULL;
3154 }
3155}
3156
3157static int cm_mra_handler(struct cm_work *work)
3158{
3159 struct cm_id_private *cm_id_priv;
3160 struct cm_mra_msg *mra_msg;
e83f195a 3161 int timeout;
a977049d
HR		 3162
3163 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
3164 cm_id_priv = cm_acquire_mraed_id(mra_msg);
3165 if (!cm_id_priv)
3166 return -EINVAL;
3167
4ca662a3
JG		 3168 work->cm_event.private_data =
3169 IBA_GET_MEM_PTR(CM_MRA_PRIVATE_DATA, mra_msg);
a977049d 3170 work->cm_event.param.mra_rcvd.service_timeout =
b6bbee68
JG		 3171 IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg);
3172 timeout = cm_convert_to_ms(IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg)) +
1d846126 3173 cm_convert_to_ms(cm_id_priv->av.timeout);
a977049d 3174
24be6e81 3175 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 3176 switch (cm_id_priv->id.state) {
3177 case IB_CM_REQ_SENT:
b6bbee68
JG		 3178 if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
3179 CM_MSG_RESPONSE_REQ ||
70076a41 3180 ib_modify_mad(cm_id_priv->msg, timeout))
a977049d
HR		 3181 goto out;
3182 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
3183 break;
3184 case IB_CM_REP_SENT:
b6bbee68
JG		 3185 if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
3186 CM_MSG_RESPONSE_REP ||
70076a41 3187 ib_modify_mad(cm_id_priv->msg, timeout))
a977049d
HR		 3188 goto out;
3189 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
3190 break;
3191 case IB_CM_ESTABLISHED:
b6bbee68
JG		 3192 if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
3193 CM_MSG_RESPONSE_OTHER ||
a977049d 3194 cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
70076a41 3195 ib_modify_mad(cm_id_priv->msg, timeout)) {
9af57b7a 3196 if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
526a12c8
JG		 3197 atomic_long_inc(
3198 &work->port->counters[CM_RECV_DUPLICATES]
3199 [CM_MRA_COUNTER]);
a977049d 3200 goto out;
9af57b7a 3201 }
a977049d
HR		 3202 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
3203 break;
9af57b7a
SH		 3204 case IB_CM_MRA_REQ_RCVD:
3205 case IB_CM_MRA_REP_RCVD:
526a12c8
JG		 3206 atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
3207 [CM_MRA_COUNTER]);
df561f66 3208 fallthrough;
a977049d 3209 default:
75874b3d 3210 trace_icm_mra_unknown_err(&cm_id_priv->id);
a977049d
HR		 3211 goto out;
3212 }
3213
3214 cm_id_priv->msg->context[1] = (void *) (unsigned long)
3215 cm_id_priv->id.state;
e83f195a 3216 cm_queue_work_unlock(cm_id_priv, work);
a977049d
HR		 3217 return 0;
3218out:
24be6e81 3219 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3220 cm_deref_id(cm_id_priv);
3221 return -EINVAL;
3222}
3223
ac3a949f
DC		 3224static void cm_format_path_lid_from_lap(struct cm_lap_msg *lap_msg,
3225 struct sa_path_rec *path)
3226{
3227 u32 lid;
3228
3229 if (path->rec_type != SA_PATH_REC_TYPE_OPA) {
91b60a71
JG		 3230 sa_path_set_dlid(path, IBA_GET(CM_LAP_ALTERNATE_LOCAL_PORT_LID,
3231 lap_msg));
3232 sa_path_set_slid(path, IBA_GET(CM_LAP_ALTERNATE_REMOTE_PORT_LID,
3233 lap_msg));
ac3a949f 3234 } else {
4ca662a3
JG		 3235 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
3236 CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg));
9d187177 3237 sa_path_set_dlid(path, lid);
ac3a949f 3238
4ca662a3
JG		 3239 lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
3240 CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg));
9d187177 3241 sa_path_set_slid(path, lid);
ac3a949f
DC		 3242 }
3243}
3244
e1444b5a 3245static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
c2f8fc4e 3246 struct sa_path_rec *path,
a977049d
HR		 3247 struct cm_lap_msg *lap_msg)
3248{
4ca662a3
JG		 3249 path->dgid = *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg);
3250 path->sgid =
3251 *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg);
01adb7f4
JG		 3252 path->flow_label =
3253 cpu_to_be32(IBA_GET(CM_LAP_ALTERNATE_FLOW_LABEL, lap_msg));
91b60a71 3254 path->hop_limit = IBA_GET(CM_LAP_ALTERNATE_HOP_LIMIT, lap_msg);
b6bbee68 3255 path->traffic_class = IBA_GET(CM_LAP_ALTERNATE_TRAFFIC_CLASS, lap_msg);
a977049d 3256 path->reversible = 1;
e1444b5a 3257 path->pkey = cm_id_priv->pkey;
b6bbee68 3258 path->sl = IBA_GET(CM_LAP_ALTERNATE_SL, lap_msg);
a977049d 3259 path->mtu_selector = IB_SA_EQ;
e1444b5a 3260 path->mtu = cm_id_priv->path_mtu;
a977049d 3261 path->rate_selector = IB_SA_EQ;
b6bbee68 3262 path->rate = IBA_GET(CM_LAP_ALTERNATE_PACKET_RATE, lap_msg);
a977049d 3263 path->packet_life_time_selector = IB_SA_EQ;
b6bbee68
JG		 3264 path->packet_life_time =
3265 IBA_GET(CM_LAP_ALTERNATE_LOCAL_ACK_TIMEOUT, lap_msg);
a977049d 3266 path->packet_life_time -= (path->packet_life_time > 0);
ac3a949f 3267 cm_format_path_lid_from_lap(lap_msg, path);
a977049d
HR		 3268}
3269
3270static int cm_lap_handler(struct cm_work *work)
3271{
3272 struct cm_id_private *cm_id_priv;
3273 struct cm_lap_msg *lap_msg;
3274 struct ib_cm_lap_event_param *param;
3275 struct ib_mad_send_buf *msg = NULL;
7345201c
MZ		 3276 struct rdma_ah_attr ah_attr;
3277 struct cm_av alt_av = {};
a977049d
HR		 3278 int ret;
3279
97c45c2c
PP		 3280 /* Currently Alternate path messages are not supported for
3281 * RoCE link layer.
3282 */
3283 if (rdma_protocol_roce(work->port->cm_dev->ib_device,
3284 work->port->port_num))
3285 return -EINVAL;
3286
a977049d
HR		 3287 /* todo: verify LAP request and send reject APR if invalid. */
3288 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
91b60a71
JG		 3289 cm_id_priv = cm_acquire_id(
3290 cpu_to_be32(IBA_GET(CM_LAP_REMOTE_COMM_ID, lap_msg)),
3291 cpu_to_be32(IBA_GET(CM_LAP_LOCAL_COMM_ID, lap_msg)));
a977049d
HR		 3292 if (!cm_id_priv)
3293 return -EINVAL;
3294
3295 param = &work->cm_event.param.lap_rcvd;
6b3c0e6e
DC		 3296 memset(&work->path[0], 0, sizeof(work->path[1]));
3297 cm_path_set_rec_type(work->port->cm_dev->ib_device,
4ca662a3
JG		 3298 work->port->port_num, &work->path[0],
3299 IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID,
3300 lap_msg));
a977049d 3301 param->alternate_path = &work->path[0];
e1444b5a 3302 cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
4ca662a3
JG		 3303 work->cm_event.private_data =
3304 IBA_GET_MEM_PTR(CM_LAP_PRIVATE_DATA, lap_msg);
a977049d 3305
7345201c
MZ		 3306 ret = ib_init_ah_attr_from_wc(work->port->cm_dev->ib_device,
3307 work->port->port_num,
3308 work->mad_recv_wc->wc,
3309 work->mad_recv_wc->recv_buf.grh,
3310 &ah_attr);
3311 if (ret)
3312 goto deref;
3313
3314 ret = cm_init_av_by_path(param->alternate_path, NULL, &alt_av);
3315 if (ret) {
3316 rdma_destroy_ah_attr(&ah_attr);
b856101a 3317 goto deref;
7345201c
MZ		 3318 }
3319
24be6e81 3320 spin_lock_irq(&cm_id_priv->lock);
7345201c
MZ		 3321 cm_init_av_for_lap(work->port, work->mad_recv_wc->wc,
3322 &ah_attr, &cm_id_priv->av);
3323 cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av);
3324
a977049d
HR		 3325 if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
3326 goto unlock;
3327
3328 switch (cm_id_priv->id.lap_state) {
e1444b5a 3329 case IB_CM_LAP_UNINIT:
a977049d
HR		 3330 case IB_CM_LAP_IDLE:
3331 break;
3332 case IB_CM_MRA_LAP_SENT:
526a12c8
JG		 3333 atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
3334 [CM_LAP_COUNTER]);
04924587
SH		 3335 msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc,
3336 true);
c7616118 3337 if (IS_ERR(msg))
a977049d
HR		 3338 goto unlock;
3339
3340 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
3341 CM_MSG_RESPONSE_OTHER,
a977049d
HR		 3342 cm_id_priv->private_data,
3343 cm_id_priv->private_data_len);
24be6e81 3344 spin_unlock_irq(&cm_id_priv->lock);
a977049d 3345
c7616118
RD		 3346 if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) ||
3347 ib_post_send_mad(msg, NULL))
1e515921 3348 cm_free_msg(msg);
a977049d 3349 goto deref;
9af57b7a 3350 case IB_CM_LAP_RCVD:
526a12c8
JG		 3351 atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
3352 [CM_LAP_COUNTER]);
9af57b7a 3353 goto unlock;
a977049d
HR		 3354 default:
3355 goto unlock;
3356 }
3357
a5c57d32
PP		 3358 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
3359 cm_id_priv->tid = lap_msg->hdr.tid;
e83f195a 3360 cm_queue_work_unlock(cm_id_priv, work);
a977049d
HR		 3361 return 0;
3362
24be6e81 3363unlock: spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3364deref: cm_deref_id(cm_id_priv);
3365 return -EINVAL;
3366}
3367
a977049d
HR		 3368static int cm_apr_handler(struct cm_work *work)
3369{
3370 struct cm_id_private *cm_id_priv;
3371 struct cm_apr_msg *apr_msg;
a977049d 3372
97c45c2c
PP		 3373 /* Currently Alternate path messages are not supported for
3374 * RoCE link layer.
3375 */
3376 if (rdma_protocol_roce(work->port->cm_dev->ib_device,
3377 work->port->port_num))
3378 return -EINVAL;
3379
a977049d 3380 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
91b60a71
JG		 3381 cm_id_priv = cm_acquire_id(
3382 cpu_to_be32(IBA_GET(CM_APR_REMOTE_COMM_ID, apr_msg)),
3383 cpu_to_be32(IBA_GET(CM_APR_LOCAL_COMM_ID, apr_msg)));
a977049d
HR		 3384 if (!cm_id_priv)
3385 return -EINVAL; /* Unmatched reply. */
3386
91b60a71
JG		 3387 work->cm_event.param.apr_rcvd.ap_status =
3388 IBA_GET(CM_APR_AR_STATUS, apr_msg);
4ca662a3
JG		 3389 work->cm_event.param.apr_rcvd.apr_info =
3390 IBA_GET_MEM_PTR(CM_APR_ADDITIONAL_INFORMATION, apr_msg);
91b60a71
JG		 3391 work->cm_event.param.apr_rcvd.info_len =
3392 IBA_GET(CM_APR_ADDITIONAL_INFORMATION_LENGTH, apr_msg);
4ca662a3
JG		 3393 work->cm_event.private_data =
3394 IBA_GET_MEM_PTR(CM_APR_PRIVATE_DATA, apr_msg);
a977049d 3395
24be6e81 3396 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 3397 if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
3398 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
3399 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
24be6e81 3400 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3401 goto out;
3402 }
3403 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
70076a41 3404 ib_cancel_mad(cm_id_priv->msg);
e83f195a 3405 cm_queue_work_unlock(cm_id_priv, work);
a977049d
HR		 3406 return 0;
3407out:
3408 cm_deref_id(cm_id_priv);
3409 return -EINVAL;
3410}
3411
3412static int cm_timewait_handler(struct cm_work *work)
3413{
3414 struct cm_timewait_info *timewait_info;
3415 struct cm_id_private *cm_id_priv;
a977049d 3416
909624d8 3417 timewait_info = container_of(work, struct cm_timewait_info, work);
8575329d
SH		 3418 spin_lock_irq(&cm.lock);
3419 list_del(&timewait_info->list);
3420 spin_unlock_irq(&cm.lock);
a977049d
HR		 3421
3422 cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
3423 timewait_info->work.remote_id);
3424 if (!cm_id_priv)
3425 return -EINVAL;
3426
8575329d 3427 spin_lock_irq(&cm_id_priv->lock);
a977049d
HR		 3428 if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
3429 cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
8575329d 3430 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3431 goto out;
3432 }
3433 cm_id_priv->id.state = IB_CM_IDLE;
e83f195a 3434 cm_queue_work_unlock(cm_id_priv, work);
a977049d
HR		 3435 return 0;
3436out:
3437 cm_deref_id(cm_id_priv);
3438 return -EINVAL;
3439}
3440
3441static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
3442 struct cm_id_private *cm_id_priv,
3443 struct ib_cm_sidr_req_param *param)
3444{
3445 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
87a37ce9 3446 cm_form_tid(cm_id_priv));
91b60a71
JG		 3447 IBA_SET(CM_SIDR_REQ_REQUESTID, sidr_req_msg,
3448 be32_to_cpu(cm_id_priv->id.local_id));
3449 IBA_SET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg,
3450 be16_to_cpu(param->path->pkey));
3451 IBA_SET(CM_SIDR_REQ_SERVICEID, sidr_req_msg,
3452 be64_to_cpu(param->service_id));
a977049d
HR		 3453
3454 if (param->private_data && param->private_data_len)
4ca662a3
JG		 3455 IBA_SET_MEM(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg,
3456 param->private_data, param->private_data_len);
a977049d
HR		 3457}
3458
3459int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
3460 struct ib_cm_sidr_req_param *param)
3461{
3462 struct cm_id_private *cm_id_priv;
3463 struct ib_mad_send_buf *msg;
7345201c 3464 struct cm_av av = {};
a977049d
HR		 3465 unsigned long flags;
3466 int ret;
3467
3468 if (!param->path || (param->private_data &&
3469 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
3470 return -EINVAL;
3471
3472 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
7345201c 3473 ret = cm_init_av_by_path(param->path, param->sgid_attr, &av);
a977049d 3474 if (ret)
4b4e586e 3475 return ret;
a977049d 3476
7345201c
MZ		 3477 spin_lock_irqsave(&cm_id_priv->lock, flags);
3478 cm_move_av_from_path(&cm_id_priv->av, &av);
a977049d 3479 cm_id->service_id = param->service_id;
a977049d
HR		 3480 cm_id_priv->timeout_ms = param->timeout_ms;
3481 cm_id_priv->max_cm_retries = param->max_cm_retries;
4b4e586e 3482 if (cm_id->state != IB_CM_IDLE) {
a977049d 3483 ret = -EINVAL;
4b4e586e 3484 goto out_unlock;
8dc105be 3485 }
a977049d 3486
1e515921 3487 msg = cm_alloc_priv_msg(cm_id_priv, IB_CM_SIDR_REQ_SENT);
4b4e586e
JG		 3488 if (IS_ERR(msg)) {
3489 ret = PTR_ERR(msg);
3490 goto out_unlock;
a977049d 3491 }
4b4e586e
JG		 3492
3493 cm_format_sidr_req((struct cm_sidr_req_msg *)msg->mad, cm_id_priv,
3494 param);
4b4e586e
JG		 3495
3496 trace_icm_send_sidr_req(&cm_id_priv->id);
3497 ret = ib_post_send_mad(msg, NULL);
3498 if (ret)
3499 goto out_free;
a977049d 3500 cm_id->state = IB_CM_SIDR_REQ_SENT;
a977049d 3501 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
4b4e586e
JG		 3502 return 0;
3503out_free:
3504 cm_free_priv_msg(msg);
3505out_unlock:
3506 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 3507 return ret;
3508}
3509EXPORT_SYMBOL(ib_send_cm_sidr_req);
3510
3511static void cm_format_sidr_req_event(struct cm_work *work,
cee10433 3512 const struct cm_id_private *rx_cm_id,
a977049d
HR		 3513 struct ib_cm_id *listen_id)
3514{
3515 struct cm_sidr_req_msg *sidr_req_msg;
3516 struct ib_cm_sidr_req_event_param *param;
3517
3518 sidr_req_msg = (struct cm_sidr_req_msg *)
3519 work->mad_recv_wc->recv_buf.mad;
3520 param = &work->cm_event.param.sidr_req_rcvd;
91b60a71 3521 param->pkey = IBA_GET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg);
a977049d 3522 param->listen_id = listen_id;
91b60a71
JG		 3523 param->service_id =
3524 cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg));
24cad9a7 3525 param->bth_pkey = cm_get_bth_pkey(work);
a977049d 3526 param->port = work->port->port_num;
cee10433 3527 param->sgid_attr = rx_cm_id->av.ah_attr.grh.sgid_attr;
4ca662a3
JG		 3528 work->cm_event.private_data =
3529 IBA_GET_MEM_PTR(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg);
a977049d
HR		 3530}
3531
3532static int cm_sidr_req_handler(struct cm_work *work)
3533{
083bfdbf 3534 struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
a977049d
HR		 3535 struct cm_sidr_req_msg *sidr_req_msg;
3536 struct ib_wc *wc;
0c4386ec 3537 int ret;
a977049d 3538
083bfdbf
JG		 3539 cm_id_priv =
3540 cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL);
3541 if (IS_ERR(cm_id_priv))
3542 return PTR_ERR(cm_id_priv);
a977049d
HR		 3543
3544 /* Record SGID/SLID and request ID for lookup. */
3545 sidr_req_msg = (struct cm_sidr_req_msg *)
3546 work->mad_recv_wc->recv_buf.mad;
083bfdbf
JG		 3547
3548 cm_id_priv->id.remote_id =
3549 cpu_to_be32(IBA_GET(CM_SIDR_REQ_REQUESTID, sidr_req_msg));
3550 cm_id_priv->id.service_id =
3551 cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg));
083bfdbf
JG		 3552 cm_id_priv->tid = sidr_req_msg->hdr.tid;
3553
a977049d 3554 wc = work->mad_recv_wc->wc;
bf0480a2 3555 cm_id_priv->sidr_slid = wc->slid;
0c4386ec
PP		 3556 ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
3557 work->mad_recv_wc->recv_buf.grh,
3558 &cm_id_priv->av);
3559 if (ret)
3560 goto out;
3561
24be6e81 3562 spin_lock_irq(&cm.lock);
083bfdbf
JG		 3563 listen_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
3564 if (listen_cm_id_priv) {
24be6e81 3565 spin_unlock_irq(&cm.lock);
526a12c8
JG		 3566 atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
3567 [CM_SIDR_REQ_COUNTER]);
a977049d
HR		 3568 goto out; /* Duplicate message. */
3569 }
29c2731c 3570 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
083bfdbf
JG		 3571 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
3572 cm_id_priv->id.service_id);
3573 if (!listen_cm_id_priv) {
24be6e81 3574 spin_unlock_irq(&cm.lock);
6a8824a7
JG		 3575 ib_send_cm_sidr_rep(&cm_id_priv->id,
3576 &(struct ib_cm_sidr_rep_param){
3577 .status = IB_SIDR_UNSUPPORTED });
a977049d
HR		 3578 goto out; /* No match. */
3579 }
24be6e81 3580 spin_unlock_irq(&cm.lock);
a977049d 3581
083bfdbf
JG		 3582 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
3583 cm_id_priv->id.context = listen_cm_id_priv->id.context;
a977049d 3584
083bfdbf
JG		 3585 /*
3586 * A SIDR ID does not need to be in the xarray since it does not receive
3587 * mads, is not placed in the remote_id or remote_qpn rbtree, and does
3588 * not enter timewait.
3589 */
3590
3591 cm_format_sidr_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
3592 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
3593 cm_free_work(work);
3594 /*
3595 * A pointer to the listen_cm_id is held in the event, so this deref
3596 * must be after the event is delivered above.
3597 */
3598 cm_deref_id(listen_cm_id_priv);
3599 if (ret)
3600 cm_destroy_id(&cm_id_priv->id, ret);
a977049d
HR		 3601 return 0;
3602out:
3603 ib_destroy_cm_id(&cm_id_priv->id);
3604 return -EINVAL;
3605}
3606
3607static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
3608 struct cm_id_private *cm_id_priv,
3609 struct ib_cm_sidr_rep_param *param)
3610{
a20652e1
LR		 3611 cm_format_mad_ece_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
3612 cm_id_priv->tid, param->ece.attr_mod);
91b60a71
JG		 3613 IBA_SET(CM_SIDR_REP_REQUESTID, sidr_rep_msg,
3614 be32_to_cpu(cm_id_priv->id.remote_id));
3615 IBA_SET(CM_SIDR_REP_STATUS, sidr_rep_msg, param->status);
01adb7f4 3616 IBA_SET(CM_SIDR_REP_QPN, sidr_rep_msg, param->qp_num);
91b60a71
JG		 3617 IBA_SET(CM_SIDR_REP_SERVICEID, sidr_rep_msg,
3618 be64_to_cpu(cm_id_priv->id.service_id));
3619 IBA_SET(CM_SIDR_REP_Q_KEY, sidr_rep_msg, param->qkey);
a20652e1
LR		 3620 IBA_SET(CM_SIDR_REP_VENDOR_ID_L, sidr_rep_msg,
3621 param->ece.vendor_id & 0xFF);
3622 IBA_SET(CM_SIDR_REP_VENDOR_ID_H, sidr_rep_msg,
3623 (param->ece.vendor_id >> 8) & 0xFF);
a977049d
HR		 3624
3625 if (param->info && param->info_length)
4ca662a3
JG		 3626 IBA_SET_MEM(CM_SIDR_REP_ADDITIONAL_INFORMATION, sidr_rep_msg,
3627 param->info, param->info_length);
a977049d
HR		 3628
3629 if (param->private_data && param->private_data_len)
4ca662a3
JG		 3630 IBA_SET_MEM(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg,
3631 param->private_data, param->private_data_len);
a977049d
HR		 3632}
3633
6a8824a7
JG		 3634static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv,
3635 struct ib_cm_sidr_rep_param *param)
a977049d 3636{
a977049d 3637 struct ib_mad_send_buf *msg;
221384df 3638 unsigned long flags;
a977049d
HR		 3639 int ret;
3640
6a8824a7
JG		 3641 lockdep_assert_held(&cm_id_priv->lock);
3642
a977049d
HR		 3643 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
3644 (param->private_data &&
3645 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
3646 return -EINVAL;
3647
6a8824a7
JG		 3648 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_RCVD)
3649 return -EINVAL;
a977049d 3650
4b4e586e
JG		 3651 msg = cm_alloc_msg(cm_id_priv);
3652 if (IS_ERR(msg))
3653 return PTR_ERR(msg);
a977049d
HR		 3654
3655 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
3656 param);
8dc105be 3657 trace_icm_send_sidr_rep(&cm_id_priv->id);
34816ad9 3658 ret = ib_post_send_mad(msg, NULL);
a977049d 3659 if (ret) {
a977049d
HR		 3660 cm_free_msg(msg);
3661 return ret;
3662 }
6a8824a7 3663 cm_id_priv->id.state = IB_CM_IDLE;
221384df 3664 spin_lock_irqsave(&cm.lock, flags);
0ca81a28
DT		 3665 if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) {
3666 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
3667 RB_CLEAR_NODE(&cm_id_priv->sidr_id_node);
3668 }
221384df 3669 spin_unlock_irqrestore(&cm.lock, flags);
a977049d 3670 return 0;
6a8824a7 3671}
a977049d 3672
6a8824a7
JG		 3673int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
3674 struct ib_cm_sidr_rep_param *param)
3675{
3676 struct cm_id_private *cm_id_priv =
3677 container_of(cm_id, struct cm_id_private, id);
3678 unsigned long flags;
3679 int ret;
3680
3681 spin_lock_irqsave(&cm_id_priv->lock, flags);
3682 ret = cm_send_sidr_rep_locked(cm_id_priv, param);
3683 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
a977049d
HR		 3684 return ret;
3685}
3686EXPORT_SYMBOL(ib_send_cm_sidr_rep);
3687
815d456e
PP		 3688static void cm_format_sidr_rep_event(struct cm_work *work,
3689 const struct cm_id_private *cm_id_priv)
a977049d
HR		 3690{
3691 struct cm_sidr_rep_msg *sidr_rep_msg;
3692 struct ib_cm_sidr_rep_event_param *param;
3693
3694 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3695 work->mad_recv_wc->recv_buf.mad;
3696 param = &work->cm_event.param.sidr_rep_rcvd;
91b60a71
JG		 3697 param->status = IBA_GET(CM_SIDR_REP_STATUS, sidr_rep_msg);
3698 param->qkey = IBA_GET(CM_SIDR_REP_Q_KEY, sidr_rep_msg);
01adb7f4 3699 param->qpn = IBA_GET(CM_SIDR_REP_QPN, sidr_rep_msg);
4ca662a3
JG		 3700 param->info = IBA_GET_MEM_PTR(CM_SIDR_REP_ADDITIONAL_INFORMATION,
3701 sidr_rep_msg);
91b60a71
JG		 3702 param->info_len = IBA_GET(CM_SIDR_REP_ADDITIONAL_INFORMATION_LENGTH,
3703 sidr_rep_msg);
815d456e 3704 param->sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr;
4ca662a3
JG		 3705 work->cm_event.private_data =
3706 IBA_GET_MEM_PTR(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg);
a977049d
HR		 3707}
3708
3709static int cm_sidr_rep_handler(struct cm_work *work)
3710{
3711 struct cm_sidr_rep_msg *sidr_rep_msg;
3712 struct cm_id_private *cm_id_priv;
a977049d
HR		 3713
3714 sidr_rep_msg = (struct cm_sidr_rep_msg *)
3715 work->mad_recv_wc->recv_buf.mad;
91b60a71
JG		 3716 cm_id_priv = cm_acquire_id(
3717 cpu_to_be32(IBA_GET(CM_SIDR_REP_REQUESTID, sidr_rep_msg)), 0);
a977049d
HR		 3718 if (!cm_id_priv)
3719 return -EINVAL; /* Unmatched reply. */
3720
24be6e81 3721 spin_lock_irq(&cm_id_priv->lock);
a977049d 3722 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
24be6e81 3723 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3724 goto out;
3725 }
3726 cm_id_priv->id.state = IB_CM_IDLE;
70076a41 3727 ib_cancel_mad(cm_id_priv->msg);
24be6e81 3728 spin_unlock_irq(&cm_id_priv->lock);
a977049d 3729
815d456e 3730 cm_format_sidr_rep_event(work, cm_id_priv);
a977049d
HR		 3731 cm_process_work(cm_id_priv, work);
3732 return 0;
3733out:
3734 cm_deref_id(cm_id_priv);
3735 return -EINVAL;
3736}
3737
c1cf6d9f
JG		 3738static void cm_process_send_error(struct cm_id_private *cm_id_priv,
3739 struct ib_mad_send_buf *msg,
a977049d
HR		 3740 enum ib_wc_status wc_status)
3741{
1e515921 3742 enum ib_cm_state state = (unsigned long) msg->context[1];
c1cf6d9f 3743 struct ib_cm_event cm_event = {};
a977049d
HR		 3744 int ret;
3745
1e515921 3746 /* Discard old sends. */
24be6e81 3747 spin_lock_irq(&cm_id_priv->lock);
c1cf6d9f
JG		 3748 if (msg != cm_id_priv->msg) {
3749 spin_unlock_irq(&cm_id_priv->lock);
7590649e
VD		 3750 cm_free_msg(msg);
3751 cm_deref_id(cm_id_priv);
c1cf6d9f
JG		 3752 return;
3753 }
3754 cm_free_priv_msg(msg);
3755
3756 if (state != cm_id_priv->id.state || wc_status == IB_WC_SUCCESS ||
3757 wc_status == IB_WC_WR_FLUSH_ERR)
3758 goto out_unlock;
a977049d 3759
75874b3d 3760 trace_icm_mad_send_err(state, wc_status);
a977049d
HR		 3761 switch (state) {
3762 case IB_CM_REQ_SENT:
3763 case IB_CM_MRA_REQ_RCVD:
3764 cm_reset_to_idle(cm_id_priv);
3765 cm_event.event = IB_CM_REQ_ERROR;
3766 break;
3767 case IB_CM_REP_SENT:
3768 case IB_CM_MRA_REP_RCVD:
3769 cm_reset_to_idle(cm_id_priv);
3770 cm_event.event = IB_CM_REP_ERROR;
3771 break;
3772 case IB_CM_DREQ_SENT:
3773 cm_enter_timewait(cm_id_priv);
3774 cm_event.event = IB_CM_DREQ_ERROR;
3775 break;
3776 case IB_CM_SIDR_REQ_SENT:
3777 cm_id_priv->id.state = IB_CM_IDLE;
3778 cm_event.event = IB_CM_SIDR_REQ_ERROR;
3779 break;
3780 default:
c1cf6d9f 3781 goto out_unlock;
a977049d 3782 }
24be6e81 3783 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3784 cm_event.param.send_status = wc_status;
3785
3786 /* No other events can occur on the cm_id at this point. */
3787 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
a977049d
HR		 3788 if (ret)
3789 ib_destroy_cm_id(&cm_id_priv->id);
3790 return;
c1cf6d9f 3791out_unlock:
24be6e81 3792 spin_unlock_irq(&cm_id_priv->lock);
a977049d
HR		 3793}
3794
3795static void cm_send_handler(struct ib_mad_agent *mad_agent,
3796 struct ib_mad_send_wc *mad_send_wc)
3797{
34816ad9 3798 struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
04924587 3799 struct cm_id_private *cm_id_priv;
9af57b7a
SH		 3800 struct cm_port *port;
3801 u16 attr_index;
3802
3803 port = mad_agent->context;
3804 attr_index = be16_to_cpu(((struct ib_mad_hdr *)
3805 msg->mad)->attr_id) - CM_ATTR_ID_OFFSET;
3806
04924587 3807 if (msg->context[0] == CM_DIRECT_RETRY_CTX) {
9af57b7a 3808 msg->retries = 1;
04924587
SH		 3809 cm_id_priv = NULL;
3810 } else {
3811 cm_id_priv = msg->context[0];
3812 }
9af57b7a 3813
526a12c8 3814 atomic_long_add(1 + msg->retries, &port->counters[CM_XMIT][attr_index]);
9af57b7a
SH		 3815 if (msg->retries)
3816 atomic_long_add(msg->retries,
526a12c8 3817 &port->counters[CM_XMIT_RETRIES][attr_index]);
a977049d 3818
c1cf6d9f 3819 if (cm_id_priv)
1e515921 3820 cm_process_send_error(cm_id_priv, msg, mad_send_wc->status);
c1cf6d9f 3821 else
1e515921 3822 cm_free_msg(msg);
a977049d
HR		 3823}
3824
c4028958 3825static void cm_work_handler(struct work_struct *_work)
a977049d 3826{
c4028958 3827 struct cm_work *work = container_of(_work, struct cm_work, work.work);
a977049d
HR		 3828 int ret;
3829
3830 switch (work->cm_event.event) {
3831 case IB_CM_REQ_RECEIVED:
3832 ret = cm_req_handler(work);
3833 break;
3834 case IB_CM_MRA_RECEIVED:
3835 ret = cm_mra_handler(work);
3836 break;
3837 case IB_CM_REJ_RECEIVED:
3838 ret = cm_rej_handler(work);
3839 break;
3840 case IB_CM_REP_RECEIVED:
3841 ret = cm_rep_handler(work);
3842 break;
3843 case IB_CM_RTU_RECEIVED:
3844 ret = cm_rtu_handler(work);
3845 break;
3846 case IB_CM_USER_ESTABLISHED:
3847 ret = cm_establish_handler(work);
3848 break;
3849 case IB_CM_DREQ_RECEIVED:
3850 ret = cm_dreq_handler(work);
3851 break;
3852 case IB_CM_DREP_RECEIVED:
3853 ret = cm_drep_handler(work);
3854 break;
3855 case IB_CM_SIDR_REQ_RECEIVED:
3856 ret = cm_sidr_req_handler(work);
3857 break;
3858 case IB_CM_SIDR_REP_RECEIVED:
3859 ret = cm_sidr_rep_handler(work);
3860 break;
3861 case IB_CM_LAP_RECEIVED:
3862 ret = cm_lap_handler(work);
3863 break;
3864 case IB_CM_APR_RECEIVED:
3865 ret = cm_apr_handler(work);
3866 break;
3867 case IB_CM_TIMEWAIT_EXIT:
3868 ret = cm_timewait_handler(work);
3869 break;
3870 default:
75874b3d 3871 trace_icm_handler_err(work->cm_event.event);
a977049d
HR		 3872 ret = -EINVAL;
3873 break;
3874 }
3875 if (ret)
3876 cm_free_work(work);
3877}
3878
e1444b5a 3879static int cm_establish(struct ib_cm_id *cm_id)
a977049d
HR		 3880{
3881 struct cm_id_private *cm_id_priv;
3882 struct cm_work *work;
3883 unsigned long flags;
3884 int ret = 0;
be4b4993
ES		 3885 struct cm_device *cm_dev;
3886
3887 cm_dev = ib_get_client_data(cm_id->device, &cm_client);
3888 if (!cm_dev)
3889 return -ENODEV;
a977049d
HR		 3890
3891 work = kmalloc(sizeof *work, GFP_ATOMIC);
3892 if (!work)
3893 return -ENOMEM;
3894
3895 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3896 spin_lock_irqsave(&cm_id_priv->lock, flags);
b6eb7011 3897 switch (cm_id->state) {
a977049d
HR		 3898 case IB_CM_REP_SENT:
3899 case IB_CM_MRA_REP_RCVD:
3900 cm_id->state = IB_CM_ESTABLISHED;
3901 break;
3902 case IB_CM_ESTABLISHED:
3903 ret = -EISCONN;
3904 break;
3905 default:
75874b3d 3906 trace_icm_establish_err(cm_id);
a977049d
HR		 3907 ret = -EINVAL;
3908 break;
3909 }
3910 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3911
3912 if (ret) {
3913 kfree(work);
3914 goto out;
3915 }
3916
3917 /*
3918 * The CM worker thread may try to destroy the cm_id before it
3919 * can execute this work item. To prevent potential deadlock,
3920 * we need to find the cm_id once we're in the context of the
3921 * worker thread, rather than holding a reference on it.
3922 */
c4028958 3923 INIT_DELAYED_WORK(&work->work, cm_work_handler);
a977049d
HR		 3924 work->local_id = cm_id->local_id;
3925 work->remote_id = cm_id->remote_id;
3926 work->mad_recv_wc = NULL;
3927 work->cm_event.event = IB_CM_USER_ESTABLISHED;
be4b4993
ES		 3928
3929 /* Check if the device started its remove_one */
943f44d9 3930 spin_lock_irqsave(&cm.lock, flags);
be4b4993
ES		 3931 if (!cm_dev->going_down) {
3932 queue_delayed_work(cm.wq, &work->work, 0);
3933 } else {
3934 kfree(work);
3935 ret = -ENODEV;
3936 }
943f44d9 3937 spin_unlock_irqrestore(&cm.lock, flags);
be4b4993 3938
a977049d
HR		 3939out:
3940 return ret;
3941}
e1444b5a
SH		 3942
3943static int cm_migrate(struct ib_cm_id *cm_id)
3944{
3945 struct cm_id_private *cm_id_priv;
3946 unsigned long flags;
3947 int ret = 0;
3948
3949 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
3950 spin_lock_irqsave(&cm_id_priv->lock, flags);
3951 if (cm_id->state == IB_CM_ESTABLISHED &&
3952 (cm_id->lap_state == IB_CM_LAP_UNINIT ||
3953 cm_id->lap_state == IB_CM_LAP_IDLE)) {
3954 cm_id->lap_state = IB_CM_LAP_IDLE;
3955 cm_id_priv->av = cm_id_priv->alt_av;
3956 } else
3957 ret = -EINVAL;
3958 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
3959
3960 return ret;
3961}
3962
3963int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
3964{
3965 int ret;
3966
3967 switch (event) {
3968 case IB_EVENT_COMM_EST:
3969 ret = cm_establish(cm_id);
3970 break;
3971 case IB_EVENT_PATH_MIG:
3972 ret = cm_migrate(cm_id);
3973 break;
3974 default:
3975 ret = -EINVAL;
3976 }
3977 return ret;
3978}
3979EXPORT_SYMBOL(ib_cm_notify);
a977049d
HR		 3980
3981static void cm_recv_handler(struct ib_mad_agent *mad_agent,
ca281265 3982 struct ib_mad_send_buf *send_buf,
a977049d
HR		 3983 struct ib_mad_recv_wc *mad_recv_wc)
3984{
9af57b7a 3985 struct cm_port *port = mad_agent->context;
a977049d
HR		 3986 struct cm_work *work;
3987 enum ib_cm_event_type event;
5a3dc323 3988 bool alt_path = false;
9af57b7a 3989 u16 attr_id;
a977049d 3990 int paths = 0;
be4b4993 3991 int going_down = 0;
a977049d
HR		 3992
3993 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
3994 case CM_REQ_ATTR_ID:
5a3dc323
PP		 3995 alt_path = cm_req_has_alt_path((struct cm_req_msg *)
3996 mad_recv_wc->recv_buf.mad);
3997 paths = 1 + (alt_path != 0);
a977049d
HR		 3998 event = IB_CM_REQ_RECEIVED;
3999 break;
4000 case CM_MRA_ATTR_ID:
4001 event = IB_CM_MRA_RECEIVED;
4002 break;
4003 case CM_REJ_ATTR_ID:
4004 event = IB_CM_REJ_RECEIVED;
4005 break;
4006 case CM_REP_ATTR_ID:
4007 event = IB_CM_REP_RECEIVED;
4008 break;
4009 case CM_RTU_ATTR_ID:
4010 event = IB_CM_RTU_RECEIVED;
4011 break;
4012 case CM_DREQ_ATTR_ID:
4013 event = IB_CM_DREQ_RECEIVED;
4014 break;
4015 case CM_DREP_ATTR_ID:
4016 event = IB_CM_DREP_RECEIVED;
4017 break;
4018 case CM_SIDR_REQ_ATTR_ID:
4019 event = IB_CM_SIDR_REQ_RECEIVED;
4020 break;
4021 case CM_SIDR_REP_ATTR_ID:
4022 event = IB_CM_SIDR_REP_RECEIVED;
4023 break;
4024 case CM_LAP_ATTR_ID:
4025 paths = 1;
4026 event = IB_CM_LAP_RECEIVED;
4027 break;
4028 case CM_APR_ATTR_ID:
4029 event = IB_CM_APR_RECEIVED;
4030 break;
4031 default:
4032 ib_free_recv_mad(mad_recv_wc);
4033 return;
4034 }
4035
9af57b7a 4036 attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id);
526a12c8 4037 atomic_long_inc(&port->counters[CM_RECV][attr_id - CM_ATTR_ID_OFFSET]);
9af57b7a 4038
b5c61b96 4039 work = kmalloc(struct_size(work, path, paths), GFP_KERNEL);
a977049d
HR		 4040 if (!work) {
4041 ib_free_recv_mad(mad_recv_wc);
4042 return;
4043 }
4044
c4028958 4045 INIT_DELAYED_WORK(&work->work, cm_work_handler);
a977049d
HR		 4046 work->cm_event.event = event;
4047 work->mad_recv_wc = mad_recv_wc;
9af57b7a 4048 work->port = port;
be4b4993
ES		 4049
4050 /* Check if the device started its remove_one */
4051 spin_lock_irq(&cm.lock);
4052 if (!port->cm_dev->going_down)
4053 queue_delayed_work(cm.wq, &work->work, 0);
4054 else
4055 going_down = 1;
4056 spin_unlock_irq(&cm.lock);
4057
4058 if (going_down) {
4059 kfree(work);
4060 ib_free_recv_mad(mad_recv_wc);
4061 }
a977049d
HR		 4062}
4063
4064static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
4065 struct ib_qp_attr *qp_attr,
4066 int *qp_attr_mask)
4067{
4068 unsigned long flags;
4069 int ret;
4070
4071 spin_lock_irqsave(&cm_id_priv->lock, flags);
4072 switch (cm_id_priv->id.state) {
4073 case IB_CM_REQ_SENT:
4074 case IB_CM_MRA_REQ_RCVD:
4075 case IB_CM_REQ_RCVD:
4076 case IB_CM_MRA_REQ_SENT:
4077 case IB_CM_REP_RCVD:
4078 case IB_CM_MRA_REP_SENT:
4079 case IB_CM_REP_SENT:
4080 case IB_CM_MRA_REP_RCVD:
4081 case IB_CM_ESTABLISHED:
4082 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
4083 IB_QP_PKEY_INDEX | IB_QP_PORT;
e31353ea 4084 qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
8b4d379b
LZ		 4085 if (cm_id_priv->responder_resources) {
4086 struct ib_device *ib_dev = cm_id_priv->id.device;
4087 u64 support_flush = ib_dev->attrs.device_cap_flags &
4088 (IB_DEVICE_FLUSH_GLOBAL | IB_DEVICE_FLUSH_PERSISTENT);
4089 u32 flushable = support_flush ?
4090 (IB_ACCESS_FLUSH_GLOBAL |
4091 IB_ACCESS_FLUSH_PERSISTENT) : 0;
4092
c1f250c0 4093 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
8b4d379b
LZ		 4094 IB_ACCESS_REMOTE_ATOMIC |
4095 flushable;
4096 }
a977049d 4097 qp_attr->pkey_index = cm_id_priv->av.pkey_index;
76039ac9
MZ		 4098 if (cm_id_priv->av.port)
4099 qp_attr->port_num = cm_id_priv->av.port->port_num;
a977049d
HR		 4100 ret = 0;
4101 break;
4102 default:
75874b3d 4103 trace_icm_qp_init_err(&cm_id_priv->id);
a977049d
HR		 4104 ret = -EINVAL;
4105 break;
4106 }
4107 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
4108 return ret;
4109}
4110
4111static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
4112 struct ib_qp_attr *qp_attr,
4113 int *qp_attr_mask)
4114{
4115 unsigned long flags;
4116 int ret;
4117
4118 spin_lock_irqsave(&cm_id_priv->lock, flags);
4119 switch (cm_id_priv->id.state) {
4120 case IB_CM_REQ_RCVD:
4121 case IB_CM_MRA_REQ_SENT:
4122 case IB_CM_REP_RCVD:
4123 case IB_CM_MRA_REP_SENT:
4124 case IB_CM_REP_SENT:
4125 case IB_CM_MRA_REP_RCVD:
4126 case IB_CM_ESTABLISHED:
4127 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
ae7971a7 4128 IB_QP_DEST_QPN | IB_QP_RQ_PSN;
a977049d 4129 qp_attr->ah_attr = cm_id_priv->av.ah_attr;
eb8336db
MZ		 4130 if ((qp_attr->ah_attr.type == RDMA_AH_ATTR_TYPE_IB) &&
4131 cm_id_priv->av.dlid_datapath &&
4132 (cm_id_priv->av.dlid_datapath != 0xffff))
4133 qp_attr->ah_attr.ib.dlid = cm_id_priv->av.dlid_datapath;
a977049d
HR		 4134 qp_attr->path_mtu = cm_id_priv->path_mtu;
4135 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
4136 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
d26a360b
SH		 4137 if (cm_id_priv->qp_type == IB_QPT_RC ||
4138 cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
ae7971a7
SH		 4139 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
4140 IB_QP_MIN_RNR_TIMER;
4141 qp_attr->max_dest_rd_atomic =
4142 cm_id_priv->responder_resources;
4143 qp_attr->min_rnr_timer = 0;
4144 }
76039ac9
MZ		 4145 if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr) &&
4146 cm_id_priv->alt_av.port) {
a977049d 4147 *qp_attr_mask |= IB_QP_ALT_PATH;
0d8fdfd7 4148 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
e1444b5a 4149 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
1d846126 4150 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
a977049d
HR		 4151 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
4152 }
4153 ret = 0;
4154 break;
4155 default:
75874b3d 4156 trace_icm_qp_rtr_err(&cm_id_priv->id);
a977049d
HR		 4157 ret = -EINVAL;
4158 break;
4159 }
4160 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
4161 return ret;
4162}
4163
4164static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
4165 struct ib_qp_attr *qp_attr,
4166 int *qp_attr_mask)
4167{
4168 unsigned long flags;
4169 int ret;
4170
4171 spin_lock_irqsave(&cm_id_priv->lock, flags);
4172 switch (cm_id_priv->id.state) {
0fe313b0
SH		 4173 /* Allow transition to RTS before sending REP */
4174 case IB_CM_REQ_RCVD:
4175 case IB_CM_MRA_REQ_SENT:
4176
a977049d
HR		 4177 case IB_CM_REP_RCVD:
4178 case IB_CM_MRA_REP_SENT:
4179 case IB_CM_REP_SENT:
4180 case IB_CM_MRA_REP_RCVD:
4181 case IB_CM_ESTABLISHED:
e1444b5a
SH		 4182 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
4183 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
4184 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
d26a360b
SH		 4185 switch (cm_id_priv->qp_type) {
4186 case IB_QPT_RC:
4187 case IB_QPT_XRC_INI:
4188 *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY |
e1444b5a 4189 IB_QP_MAX_QP_RD_ATOMIC;
e1444b5a
SH		 4190 qp_attr->retry_cnt = cm_id_priv->retry_count;
4191 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
d26a360b 4192 qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
df561f66 4193 fallthrough;
d26a360b
SH		 4194 case IB_QPT_XRC_TGT:
4195 *qp_attr_mask |= IB_QP_TIMEOUT;
4196 qp_attr->timeout = cm_id_priv->av.timeout;
4197 break;
4198 default:
4199 break;
e1444b5a 4200 }
d8966fcd 4201 if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr)) {
e1444b5a
SH		 4202 *qp_attr_mask |= IB_QP_PATH_MIG_STATE;
4203 qp_attr->path_mig_state = IB_MIG_REARM;
4204 }
4205 } else {
4206 *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
76039ac9
MZ		 4207 if (cm_id_priv->alt_av.port)
4208 qp_attr->alt_port_num =
4209 cm_id_priv->alt_av.port->port_num;
e1444b5a 4210 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
1d846126 4211 qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
e1444b5a 4212 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
a977049d
HR		 4213 qp_attr->path_mig_state = IB_MIG_REARM;
4214 }
4215 ret = 0;
4216 break;
4217 default:
75874b3d 4218 trace_icm_qp_rts_err(&cm_id_priv->id);
a977049d
HR		 4219 ret = -EINVAL;
4220 break;
4221 }
4222 spin_unlock_irqrestore(&cm_id_priv->lock, flags);
4223 return ret;
4224}
4225
4226int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
4227 struct ib_qp_attr *qp_attr,
4228 int *qp_attr_mask)
4229{
4230 struct cm_id_private *cm_id_priv;
4231 int ret;
4232
4233 cm_id_priv = container_of(cm_id, struct cm_id_private, id);
4234 switch (qp_attr->qp_state) {
4235 case IB_QPS_INIT:
4236 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
4237 break;
4238 case IB_QPS_RTR:
4239 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
4240 break;
4241 case IB_QPS_RTS:
4242 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
4243 break;
4244 default:
4245 ret = -EINVAL;
4246 break;
4247 }
4248 return ret;
4249}
4250EXPORT_SYMBOL(ib_cm_init_qp_attr);
4251
526a12c8
JG		 4252static ssize_t cm_show_counter(struct ib_device *ibdev, u32 port_num,
4253 struct ib_port_attribute *attr, char *buf)
9af57b7a 4254{
526a12c8
JG		 4255 struct cm_counter_attribute *cm_attr =
4256 container_of(attr, struct cm_counter_attribute, attr);
4257 struct cm_device *cm_dev = ib_get_client_data(ibdev, &cm_client);
9af57b7a 4258
526a12c8
JG		 4259 if (WARN_ON(!cm_dev))
4260 return -EINVAL;
9af57b7a 4261
526a12c8
JG		 4262 return sysfs_emit(
4263 buf, "%ld\n",
4264 atomic_long_read(
4265 &cm_dev->port[port_num - 1]
4266 ->counters[cm_attr->group][cm_attr->index]));
9af57b7a
SH		 4267}
4268
526a12c8
JG		 4269#define CM_COUNTER_ATTR(_name, _group, _index) \
4270 { \
4271 .attr = __ATTR(_name, 0444, cm_show_counter, NULL), \
4272 .group = _group, .index = _index \
9af57b7a
SH		 4273 }
4274
526a12c8
JG		 4275#define CM_COUNTER_GROUP(_group, _name) \
4276 static struct cm_counter_attribute cm_counter_attr_##_group[] = { \
4277 CM_COUNTER_ATTR(req, _group, CM_REQ_COUNTER), \
4278 CM_COUNTER_ATTR(mra, _group, CM_MRA_COUNTER), \
4279 CM_COUNTER_ATTR(rej, _group, CM_REJ_COUNTER), \
4280 CM_COUNTER_ATTR(rep, _group, CM_REP_COUNTER), \
4281 CM_COUNTER_ATTR(rtu, _group, CM_RTU_COUNTER), \
4282 CM_COUNTER_ATTR(dreq, _group, CM_DREQ_COUNTER), \
4283 CM_COUNTER_ATTR(drep, _group, CM_DREP_COUNTER), \
4284 CM_COUNTER_ATTR(sidr_req, _group, CM_SIDR_REQ_COUNTER), \
4285 CM_COUNTER_ATTR(sidr_rep, _group, CM_SIDR_REP_COUNTER), \
4286 CM_COUNTER_ATTR(lap, _group, CM_LAP_COUNTER), \
4287 CM_COUNTER_ATTR(apr, _group, CM_APR_COUNTER), \
4288 }; \
4289 static struct attribute *cm_counter_attrs_##_group[] = { \
4290 &cm_counter_attr_##_group[0].attr.attr, \
4291 &cm_counter_attr_##_group[1].attr.attr, \
4292 &cm_counter_attr_##_group[2].attr.attr, \
4293 &cm_counter_attr_##_group[3].attr.attr, \
4294 &cm_counter_attr_##_group[4].attr.attr, \
4295 &cm_counter_attr_##_group[5].attr.attr, \
4296 &cm_counter_attr_##_group[6].attr.attr, \
4297 &cm_counter_attr_##_group[7].attr.attr, \
4298 &cm_counter_attr_##_group[8].attr.attr, \
4299 &cm_counter_attr_##_group[9].attr.attr, \
4300 &cm_counter_attr_##_group[10].attr.attr, \
4301 NULL, \
4302 }; \
4303 static const struct attribute_group cm_counter_group_##_group = { \
4304 .name = _name, \
4305 .attrs = cm_counter_attrs_##_group, \
4306 };
9af57b7a 4307
526a12c8
JG		 4308CM_COUNTER_GROUP(CM_XMIT, "cm_tx_msgs")
4309CM_COUNTER_GROUP(CM_XMIT_RETRIES, "cm_tx_retries")
4310CM_COUNTER_GROUP(CM_RECV, "cm_rx_msgs")
4311CM_COUNTER_GROUP(CM_RECV_DUPLICATES, "cm_rx_duplicates")
4312
4313static const struct attribute_group *cm_counter_groups[] = {
4314 &cm_counter_group_CM_XMIT,
4315 &cm_counter_group_CM_XMIT_RETRIES,
4316 &cm_counter_group_CM_RECV,
4317 &cm_counter_group_CM_RECV_DUPLICATES,
4318 NULL,
4319};
9af57b7a 4320
11a0ae4c 4321static int cm_add_one(struct ib_device *ib_device)
a977049d
HR		 4322{
4323 struct cm_device *cm_dev;
4324 struct cm_port *port;
4325 struct ib_mad_reg_req reg_req = {
4326 .mgmt_class = IB_MGMT_CLASS_CM,
0f29b46d 4327 .mgmt_class_version = IB_CM_CLASS_VERSION,
a977049d
HR		 4328 };
4329 struct ib_port_modify port_modify = {
4330 .set_port_cap_mask = IB_PORT_CM_SUP
4331 };
4332 unsigned long flags;
4333 int ret;
091e6a4c 4334 int count = 0;
1fb7f897 4335 u32 i;
a977049d 4336
acafe7e3
KC		 4337 cm_dev = kzalloc(struct_size(cm_dev, port, ib_device->phys_port_cnt),
4338 GFP_KERNEL);
a977049d 4339 if (!cm_dev)
11a0ae4c 4340 return -ENOMEM;
a977049d 4341
76039ac9 4342 kref_init(&cm_dev->kref);
4dab26be 4343 rwlock_init(&cm_dev->mad_agent_lock);
d4c4196f 4344 cm_dev->ib_device = ib_device;
86bee4c9 4345 cm_dev->ack_delay = ib_device->attrs.local_ca_ack_delay;
be4b4993 4346 cm_dev->going_down = 0;
9af57b7a 4347
526a12c8
JG		 4348 ib_set_client_data(ib_device, &cm_client, cm_dev);
4349
a977049d 4350 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
131be267 4351 rdma_for_each_port (ib_device, i) {
72219cea 4352 if (!rdma_cap_ib_cm(ib_device, i))
091e6a4c
MW		 4353 continue;
4354
9af57b7a 4355 port = kzalloc(sizeof *port, GFP_KERNEL);
11a0ae4c
JG		 4356 if (!port) {
4357 ret = -ENOMEM;
9af57b7a 4358 goto error1;
11a0ae4c 4359 }
9af57b7a
SH		 4360
4361 cm_dev->port[i-1] = port;
a977049d
HR		 4362 port->cm_dev = cm_dev;
4363 port->port_num = i;
9af57b7a 4364
526a12c8
JG		 4365 ret = ib_port_register_client_groups(ib_device, i,
4366 cm_counter_groups);
9af57b7a
SH		 4367 if (ret)
4368 goto error1;
4369
d4c4196f 4370 port->mad_agent = ib_register_mad_agent(ib_device, i,
a977049d
HR		 4371 IB_QPT_GSI,
4372 &reg_req,
4373 0,
4374 cm_send_handler,
4375 cm_recv_handler,
0f29b46d
IW		 4376 port,
4377 0);
11a0ae4c
JG		 4378 if (IS_ERR(port->mad_agent)) {
4379 ret = PTR_ERR(port->mad_agent);
9af57b7a 4380 goto error2;
11a0ae4c 4381 }
a977049d 4382
d4c4196f 4383 ret = ib_modify_port(ib_device, i, 0, &port_modify);
a977049d 4384 if (ret)
9af57b7a 4385 goto error3;
091e6a4c
MW		 4386
4387 count++;
a977049d 4388 }
091e6a4c 4389
11a0ae4c
JG		 4390 if (!count) {
4391 ret = -EOPNOTSUPP;
091e6a4c 4392 goto free;
11a0ae4c 4393 }
091e6a4c 4394
a977049d
HR		 4395 write_lock_irqsave(&cm.device_lock, flags);
4396 list_add_tail(&cm_dev->list, &cm.device_list);
4397 write_unlock_irqrestore(&cm.device_lock, flags);
11a0ae4c 4398 return 0;
a977049d 4399
9af57b7a 4400error3:
cf311cd4 4401 ib_unregister_mad_agent(port->mad_agent);
9af57b7a 4402error2:
526a12c8 4403 ib_port_unregister_client_groups(ib_device, i, cm_counter_groups);
cf311cd4 4404error1:
a977049d
HR		 4405 port_modify.set_port_cap_mask = 0;
4406 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
4407 while (--i) {
72219cea 4408 if (!rdma_cap_ib_cm(ib_device, i))
091e6a4c
MW		 4409 continue;
4410
9af57b7a 4411 port = cm_dev->port[i-1];
d4c4196f 4412 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
a977049d 4413 ib_unregister_mad_agent(port->mad_agent);
526a12c8
JG		 4414 ib_port_unregister_client_groups(ib_device, i,
4415 cm_counter_groups);
a977049d 4416 }
091e6a4c 4417free:
76039ac9 4418 cm_device_put(cm_dev);
11a0ae4c 4419 return ret;
a977049d
HR		 4420}
4421
7c1eb45a 4422static void cm_remove_one(struct ib_device *ib_device, void *client_data)
a977049d 4423{
7c1eb45a 4424 struct cm_device *cm_dev = client_data;
a977049d
HR		 4425 struct cm_port *port;
4426 struct ib_port_modify port_modify = {
4427 .clr_port_cap_mask = IB_PORT_CM_SUP
4428 };
4429 unsigned long flags;
1fb7f897 4430 u32 i;
a977049d 4431
a977049d
HR		 4432 write_lock_irqsave(&cm.device_lock, flags);
4433 list_del(&cm_dev->list);
4434 write_unlock_irqrestore(&cm.device_lock, flags);
4435
be4b4993
ES		 4436 spin_lock_irq(&cm.lock);
4437 cm_dev->going_down = 1;
4438 spin_unlock_irq(&cm.lock);
4439
131be267 4440 rdma_for_each_port (ib_device, i) {
76039ac9
MZ		 4441 struct ib_mad_agent *mad_agent;
4442
72219cea 4443 if (!rdma_cap_ib_cm(ib_device, i))
091e6a4c
MW		 4444 continue;
4445
9af57b7a 4446 port = cm_dev->port[i-1];
76039ac9 4447 mad_agent = port->mad_agent;
d4c4196f 4448 ib_modify_port(ib_device, port->port_num, 0, &port_modify);
be4b4993
ES		 4449 /*
4450 * We flush the queue here after the going_down set, this
4451 * verify that no new works will be queued in the recv handler,
4452 * after that we can call the unregister_mad_agent
4453 */
84ba284c 4454 flush_workqueue(cm.wq);
76039ac9
MZ		 4455 /*
4456 * The above ensures no call paths from the work are running,
4457 * the remaining paths all take the mad_agent_lock.
4458 */
4dab26be 4459 write_lock(&cm_dev->mad_agent_lock);
76039ac9 4460 port->mad_agent = NULL;
4dab26be 4461 write_unlock(&cm_dev->mad_agent_lock);
76039ac9 4462 ib_unregister_mad_agent(mad_agent);
526a12c8
JG		 4463 ib_port_unregister_client_groups(ib_device, i,
4464 cm_counter_groups);
a977049d 4465 }
9db0ff53 4466
76039ac9 4467 cm_device_put(cm_dev);
a977049d
HR		 4468}
4469
4470static int __init ib_cm_init(void)
4471{
4472 int ret;
4473
a977049d
HR		 4474 INIT_LIST_HEAD(&cm.device_list);
4475 rwlock_init(&cm.device_lock);
4476 spin_lock_init(&cm.lock);
4477 cm.listen_service_table = RB_ROOT;
9c3da099 4478 cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
a977049d
HR		 4479 cm.remote_id_table = RB_ROOT;
4480 cm.remote_qp_table = RB_ROOT;
4481 cm.remote_sidr_table = RB_ROOT;
eb73060b 4482 xa_init_flags(&cm.local_id_table, XA_FLAGS_ALLOC);
f06d2653 4483 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
8575329d 4484 INIT_LIST_HEAD(&cm.timewait_list);
a977049d 4485
cb93e597 4486 cm.wq = alloc_workqueue("ib_cm", 0, 1);
9af57b7a
SH		 4487 if (!cm.wq) {
4488 ret = -ENOMEM;
87d4abda 4489 goto error2;
9af57b7a
SH		 4490 }
4491
a977049d
HR		 4492 ret = ib_register_client(&cm_client);
4493 if (ret)
87d4abda 4494 goto error3;
a977049d
HR		 4495
4496 return 0;
87d4abda 4497error3:
a977049d 4498 destroy_workqueue(cm.wq);
87d4abda 4499error2:
a977049d
HR		 4500 return ret;
4501}
4502
4503static void __exit ib_cm_cleanup(void)
4504{
8575329d
SH		 4505 struct cm_timewait_info *timewait_info, *tmp;
4506
4507 spin_lock_irq(&cm.lock);
4508 list_for_each_entry(timewait_info, &cm.timewait_list, list)
4509 cancel_delayed_work(&timewait_info->work.work);
4510 spin_unlock_irq(&cm.lock);
4511
84ba284c 4512 ib_unregister_client(&cm_client);
a977049d 4513 destroy_workqueue(cm.wq);
8575329d
SH		 4514
4515 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
4516 list_del(&timewait_info->list);
4517 kfree(timewait_info);
4518 }
4519
ae78ff3a 4520 WARN_ON(!xa_empty(&cm.local_id_table));
a977049d
HR		 4521}
4522
4523module_init(ib_cm_init);
4524module_exit(ib_cm_cleanup);
Linux 6.x block layer and io_uring tree(s)