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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 | |
33 | MODULE_AUTHOR("Sean Hefty"); | |
34 | MODULE_DESCRIPTION("InfiniBand CM"); | |
35 | MODULE_LICENSE("Dual BSD/GPL"); | |
36 | ||
77a5db13 SW |
37 | static const char * const ibcm_rej_reason_strs[] = { |
38 | [IB_CM_REJ_NO_QP] = "no QP", | |
39 | [IB_CM_REJ_NO_EEC] = "no EEC", | |
40 | [IB_CM_REJ_NO_RESOURCES] = "no resources", | |
41 | [IB_CM_REJ_TIMEOUT] = "timeout", | |
42 | [IB_CM_REJ_UNSUPPORTED] = "unsupported", | |
43 | [IB_CM_REJ_INVALID_COMM_ID] = "invalid comm ID", | |
44 | [IB_CM_REJ_INVALID_COMM_INSTANCE] = "invalid comm instance", | |
45 | [IB_CM_REJ_INVALID_SERVICE_ID] = "invalid service ID", | |
46 | [IB_CM_REJ_INVALID_TRANSPORT_TYPE] = "invalid transport type", | |
47 | [IB_CM_REJ_STALE_CONN] = "stale conn", | |
48 | [IB_CM_REJ_RDC_NOT_EXIST] = "RDC not exist", | |
49 | [IB_CM_REJ_INVALID_GID] = "invalid GID", | |
50 | [IB_CM_REJ_INVALID_LID] = "invalid LID", | |
51 | [IB_CM_REJ_INVALID_SL] = "invalid SL", | |
52 | [IB_CM_REJ_INVALID_TRAFFIC_CLASS] = "invalid traffic class", | |
53 | [IB_CM_REJ_INVALID_HOP_LIMIT] = "invalid hop limit", | |
54 | [IB_CM_REJ_INVALID_PACKET_RATE] = "invalid packet rate", | |
55 | [IB_CM_REJ_INVALID_ALT_GID] = "invalid alt GID", | |
56 | [IB_CM_REJ_INVALID_ALT_LID] = "invalid alt LID", | |
57 | [IB_CM_REJ_INVALID_ALT_SL] = "invalid alt SL", | |
58 | [IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS] = "invalid alt traffic class", | |
59 | [IB_CM_REJ_INVALID_ALT_HOP_LIMIT] = "invalid alt hop limit", | |
60 | [IB_CM_REJ_INVALID_ALT_PACKET_RATE] = "invalid alt packet rate", | |
61 | [IB_CM_REJ_PORT_CM_REDIRECT] = "port CM redirect", | |
62 | [IB_CM_REJ_PORT_REDIRECT] = "port redirect", | |
63 | [IB_CM_REJ_INVALID_MTU] = "invalid MTU", | |
64 | [IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES] = "insufficient resp resources", | |
65 | [IB_CM_REJ_CONSUMER_DEFINED] = "consumer defined", | |
66 | [IB_CM_REJ_INVALID_RNR_RETRY] = "invalid RNR retry", | |
67 | [IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID] = "duplicate local comm ID", | |
68 | [IB_CM_REJ_INVALID_CLASS_VERSION] = "invalid class version", | |
69 | [IB_CM_REJ_INVALID_FLOW_LABEL] = "invalid flow label", | |
70 | [IB_CM_REJ_INVALID_ALT_FLOW_LABEL] = "invalid alt flow label", | |
a20652e1 LR |
71 | [IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED] = |
72 | "vendor option is not supported", | |
77a5db13 SW |
73 | }; |
74 | ||
75 | const char *__attribute_const__ ibcm_reject_msg(int reason) | |
76 | { | |
77 | size_t index = reason; | |
78 | ||
79 | if (index < ARRAY_SIZE(ibcm_rej_reason_strs) && | |
80 | ibcm_rej_reason_strs[index]) | |
81 | return ibcm_rej_reason_strs[index]; | |
82 | else | |
83 | return "unrecognized reason"; | |
84 | } | |
85 | EXPORT_SYMBOL(ibcm_reject_msg); | |
86 | ||
e029fdc0 | 87 | struct cm_id_private; |
e83f195a | 88 | struct cm_work; |
11a0ae4c | 89 | static int cm_add_one(struct ib_device *device); |
7c1eb45a | 90 | static void cm_remove_one(struct ib_device *device, void *client_data); |
e83f195a JG |
91 | static void cm_process_work(struct cm_id_private *cm_id_priv, |
92 | struct cm_work *work); | |
6a8824a7 JG |
93 | static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv, |
94 | struct ib_cm_sidr_rep_param *param); | |
e029fdc0 JG |
95 | static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv, |
96 | const void *private_data, u8 private_data_len); | |
87cabf3e JG |
97 | static int cm_send_drep_locked(struct cm_id_private *cm_id_priv, |
98 | void *private_data, u8 private_data_len); | |
81ddb41f JG |
99 | static int cm_send_rej_locked(struct cm_id_private *cm_id_priv, |
100 | enum ib_cm_rej_reason reason, void *ari, | |
101 | u8 ari_length, const void *private_data, | |
102 | u8 private_data_len); | |
a977049d HR |
103 | |
104 | static struct ib_client cm_client = { | |
105 | .name = "cm", | |
106 | .add = cm_add_one, | |
107 | .remove = cm_remove_one | |
108 | }; | |
109 | ||
110 | static struct ib_cm { | |
111 | spinlock_t lock; | |
112 | struct list_head device_list; | |
113 | rwlock_t device_lock; | |
114 | struct rb_root listen_service_table; | |
115 | u64 listen_service_id; | |
116 | /* struct rb_root peer_service_table; todo: fix peer to peer */ | |
117 | struct rb_root remote_qp_table; | |
118 | struct rb_root remote_id_table; | |
119 | struct rb_root remote_sidr_table; | |
ae78ff3a MW |
120 | struct xarray local_id_table; |
121 | u32 local_id_next; | |
f06d2653 | 122 | __be32 random_id_operand; |
8575329d | 123 | struct list_head timewait_list; |
a977049d HR |
124 | struct workqueue_struct *wq; |
125 | } cm; | |
126 | ||
9af57b7a SH |
127 | /* Counter indexes ordered by attribute ID */ |
128 | enum { | |
129 | CM_REQ_COUNTER, | |
130 | CM_MRA_COUNTER, | |
131 | CM_REJ_COUNTER, | |
132 | CM_REP_COUNTER, | |
133 | CM_RTU_COUNTER, | |
134 | CM_DREQ_COUNTER, | |
135 | CM_DREP_COUNTER, | |
136 | CM_SIDR_REQ_COUNTER, | |
137 | CM_SIDR_REP_COUNTER, | |
138 | CM_LAP_COUNTER, | |
139 | CM_APR_COUNTER, | |
140 | CM_ATTR_COUNT, | |
141 | CM_ATTR_ID_OFFSET = 0x0010, | |
142 | }; | |
143 | ||
144 | enum { | |
145 | CM_XMIT, | |
146 | CM_XMIT_RETRIES, | |
147 | CM_RECV, | |
148 | CM_RECV_DUPLICATES, | |
149 | CM_COUNTER_GROUPS | |
150 | }; | |
151 | ||
9af57b7a | 152 | struct cm_counter_attribute { |
526a12c8 JG |
153 | struct ib_port_attribute attr; |
154 | unsigned short group; | |
155 | unsigned short index; | |
9af57b7a SH |
156 | }; |
157 | ||
a977049d HR |
158 | struct cm_port { |
159 | struct cm_device *cm_dev; | |
160 | struct ib_mad_agent *mad_agent; | |
1fb7f897 | 161 | u32 port_num; |
526a12c8 | 162 | atomic_long_t counters[CM_COUNTER_GROUPS][CM_ATTR_COUNT]; |
a977049d HR |
163 | }; |
164 | ||
165 | struct cm_device { | |
76039ac9 | 166 | struct kref kref; |
a977049d | 167 | struct list_head list; |
76039ac9 | 168 | spinlock_t mad_agent_lock; |
d4c4196f | 169 | struct ib_device *ib_device; |
1d846126 | 170 | u8 ack_delay; |
be4b4993 | 171 | int going_down; |
5b361328 | 172 | struct cm_port *port[]; |
a977049d HR |
173 | }; |
174 | ||
175 | struct cm_av { | |
176 | struct cm_port *port; | |
90898850 | 177 | struct rdma_ah_attr ah_attr; |
a977049d | 178 | u16 pkey_index; |
1d846126 | 179 | u8 timeout; |
a977049d HR |
180 | }; |
181 | ||
182 | struct cm_work { | |
c4028958 | 183 | struct delayed_work work; |
a977049d HR |
184 | struct list_head list; |
185 | struct cm_port *port; | |
186 | struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ | |
97f52eb4 SH |
187 | __be32 local_id; /* Established / timewait */ |
188 | __be32 remote_id; | |
a977049d | 189 | struct ib_cm_event cm_event; |
5b361328 | 190 | struct sa_path_rec path[]; |
a977049d HR |
191 | }; |
192 | ||
193 | struct cm_timewait_info { | |
909624d8 | 194 | struct cm_work work; |
8575329d | 195 | struct list_head list; |
a977049d HR |
196 | struct rb_node remote_qp_node; |
197 | struct rb_node remote_id_node; | |
97f52eb4 SH |
198 | __be64 remote_ca_guid; |
199 | __be32 remote_qpn; | |
a977049d HR |
200 | u8 inserted_remote_qp; |
201 | u8 inserted_remote_id; | |
202 | }; | |
203 | ||
204 | struct cm_id_private { | |
205 | struct ib_cm_id id; | |
206 | ||
207 | struct rb_node service_node; | |
208 | struct rb_node sidr_id_node; | |
bf0480a2 | 209 | u32 sidr_slid; |
87fd1a11 | 210 | spinlock_t lock; /* Do not acquire inside cm.lock */ |
1b52fa98 | 211 | struct completion comp; |
0acc637d | 212 | refcount_t refcount; |
067b171b | 213 | /* Number of clients sharing this ib_cm_id. Only valid for listeners. |
26caea5f WL |
214 | * Protected by the cm.lock spinlock. |
215 | */ | |
067b171b | 216 | int listen_sharecount; |
4d6e8a03 | 217 | struct rcu_head rcu; |
a977049d HR |
218 | |
219 | struct ib_mad_send_buf *msg; | |
220 | struct cm_timewait_info *timewait_info; | |
221 | /* todo: use alternate port on send failure */ | |
222 | struct cm_av av; | |
223 | struct cm_av alt_av; | |
224 | ||
225 | void *private_data; | |
97f52eb4 SH |
226 | __be64 tid; |
227 | __be32 local_qpn; | |
228 | __be32 remote_qpn; | |
ae7971a7 | 229 | enum ib_qp_type qp_type; |
97f52eb4 SH |
230 | __be32 sq_psn; |
231 | __be32 rq_psn; | |
a977049d HR |
232 | int timeout_ms; |
233 | enum ib_mtu path_mtu; | |
e1444b5a | 234 | __be16 pkey; |
a977049d HR |
235 | u8 private_data_len; |
236 | u8 max_cm_retries; | |
a977049d HR |
237 | u8 responder_resources; |
238 | u8 initiator_depth; | |
a977049d HR |
239 | u8 retry_count; |
240 | u8 rnr_retry_count; | |
241 | u8 service_timeout; | |
1d846126 | 242 | u8 target_ack_delay; |
a977049d HR |
243 | |
244 | struct list_head work_list; | |
245 | atomic_t work_count; | |
a20652e1 LR |
246 | |
247 | struct rdma_ucm_ece ece; | |
a977049d HR |
248 | }; |
249 | ||
76039ac9 MZ |
250 | static void cm_dev_release(struct kref *kref) |
251 | { | |
252 | struct cm_device *cm_dev = container_of(kref, struct cm_device, kref); | |
253 | u32 i; | |
254 | ||
255 | rdma_for_each_port(cm_dev->ib_device, i) | |
256 | kfree(cm_dev->port[i - 1]); | |
257 | ||
258 | kfree(cm_dev); | |
259 | } | |
260 | ||
261 | static void cm_device_put(struct cm_device *cm_dev) | |
262 | { | |
263 | kref_put(&cm_dev->kref, cm_dev_release); | |
264 | } | |
265 | ||
c4028958 | 266 | static void cm_work_handler(struct work_struct *work); |
a977049d HR |
267 | |
268 | static inline void cm_deref_id(struct cm_id_private *cm_id_priv) | |
269 | { | |
0acc637d | 270 | if (refcount_dec_and_test(&cm_id_priv->refcount)) |
1b52fa98 | 271 | complete(&cm_id_priv->comp); |
a977049d HR |
272 | } |
273 | ||
4b4e586e | 274 | static struct ib_mad_send_buf *cm_alloc_msg(struct cm_id_private *cm_id_priv) |
a977049d HR |
275 | { |
276 | struct ib_mad_agent *mad_agent; | |
277 | struct ib_mad_send_buf *m; | |
278 | struct ib_ah *ah; | |
279 | ||
76039ac9 MZ |
280 | lockdep_assert_held(&cm_id_priv->lock); |
281 | ||
282 | if (!cm_id_priv->av.port) | |
283 | return ERR_PTR(-EINVAL); | |
284 | ||
285 | spin_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); | |
a977049d | 286 | mad_agent = cm_id_priv->av.port->mad_agent; |
76039ac9 MZ |
287 | if (!mad_agent) { |
288 | m = ERR_PTR(-EINVAL); | |
289 | goto out; | |
290 | } | |
291 | ||
3595c398 | 292 | ah = rdma_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr, 0); |
76039ac9 MZ |
293 | if (IS_ERR(ah)) { |
294 | m = ERR_CAST(ah); | |
295 | goto out; | |
296 | } | |
a977049d | 297 | |
3cd96564 | 298 | m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
3595c398 | 299 | cm_id_priv->av.pkey_index, |
34816ad9 | 300 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, |
da2dfaa3 IW |
301 | GFP_ATOMIC, |
302 | IB_MGMT_BASE_VERSION); | |
a977049d | 303 | if (IS_ERR(m)) { |
2553ba21 | 304 | rdma_destroy_ah(ah, 0); |
76039ac9 | 305 | goto out; |
a977049d HR |
306 | } |
307 | ||
308 | /* Timeout set by caller if response is expected. */ | |
34816ad9 SH |
309 | m->ah = ah; |
310 | m->retries = cm_id_priv->max_cm_retries; | |
a977049d | 311 | |
0acc637d | 312 | refcount_inc(&cm_id_priv->refcount); |
a977049d | 313 | m->context[0] = cm_id_priv; |
76039ac9 MZ |
314 | |
315 | out: | |
316 | spin_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); | |
4b4e586e | 317 | return m; |
4b4e586e JG |
318 | } |
319 | ||
efafae67 JG |
320 | static void cm_free_msg(struct ib_mad_send_buf *msg) |
321 | { | |
322 | struct cm_id_private *cm_id_priv = msg->context[0]; | |
323 | ||
324 | if (msg->ah) | |
325 | rdma_destroy_ah(msg->ah, 0); | |
326 | cm_deref_id(cm_id_priv); | |
327 | ib_free_send_mad(msg); | |
328 | } | |
329 | ||
4b4e586e JG |
330 | static struct ib_mad_send_buf * |
331 | cm_alloc_priv_msg(struct cm_id_private *cm_id_priv) | |
332 | { | |
333 | struct ib_mad_send_buf *msg; | |
334 | ||
335 | lockdep_assert_held(&cm_id_priv->lock); | |
336 | ||
337 | msg = cm_alloc_msg(cm_id_priv); | |
338 | if (IS_ERR(msg)) | |
339 | return msg; | |
340 | cm_id_priv->msg = msg; | |
341 | return msg; | |
342 | } | |
343 | ||
344 | static void cm_free_priv_msg(struct ib_mad_send_buf *msg) | |
345 | { | |
346 | struct cm_id_private *cm_id_priv = msg->context[0]; | |
347 | ||
348 | lockdep_assert_held(&cm_id_priv->lock); | |
349 | ||
350 | if (!WARN_ON(cm_id_priv->msg != msg)) | |
351 | cm_id_priv->msg = NULL; | |
352 | ||
353 | if (msg->ah) | |
354 | rdma_destroy_ah(msg->ah, 0); | |
355 | cm_deref_id(cm_id_priv); | |
356 | ib_free_send_mad(msg); | |
a977049d HR |
357 | } |
358 | ||
c7616118 RD |
359 | static struct ib_mad_send_buf *cm_alloc_response_msg_no_ah(struct cm_port *port, |
360 | struct ib_mad_recv_wc *mad_recv_wc) | |
361 | { | |
362 | return ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, | |
363 | 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, | |
364 | GFP_ATOMIC, | |
365 | IB_MGMT_BASE_VERSION); | |
366 | } | |
367 | ||
368 | static int cm_create_response_msg_ah(struct cm_port *port, | |
369 | struct ib_mad_recv_wc *mad_recv_wc, | |
370 | struct ib_mad_send_buf *msg) | |
a977049d | 371 | { |
a977049d HR |
372 | struct ib_ah *ah; |
373 | ||
374 | ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, | |
375 | mad_recv_wc->recv_buf.grh, port->port_num); | |
376 | if (IS_ERR(ah)) | |
377 | return PTR_ERR(ah); | |
378 | ||
c7616118 | 379 | msg->ah = ah; |
a977049d HR |
380 | return 0; |
381 | } | |
382 | ||
c7616118 RD |
383 | static int cm_alloc_response_msg(struct cm_port *port, |
384 | struct ib_mad_recv_wc *mad_recv_wc, | |
385 | struct ib_mad_send_buf **msg) | |
386 | { | |
387 | struct ib_mad_send_buf *m; | |
388 | int ret; | |
389 | ||
390 | m = cm_alloc_response_msg_no_ah(port, mad_recv_wc); | |
391 | if (IS_ERR(m)) | |
392 | return PTR_ERR(m); | |
393 | ||
394 | ret = cm_create_response_msg_ah(port, mad_recv_wc, m); | |
395 | if (ret) { | |
96376a40 | 396 | ib_free_send_mad(m); |
c7616118 RD |
397 | return ret; |
398 | } | |
399 | ||
400 | *msg = m; | |
401 | return 0; | |
402 | } | |
403 | ||
96376a40 JG |
404 | static void cm_free_response_msg(struct ib_mad_send_buf *msg) |
405 | { | |
406 | if (msg->ah) | |
407 | rdma_destroy_ah(msg->ah, 0); | |
408 | ib_free_send_mad(msg); | |
409 | } | |
410 | ||
f681967a | 411 | static void *cm_copy_private_data(const void *private_data, u8 private_data_len) |
a977049d HR |
412 | { |
413 | void *data; | |
414 | ||
415 | if (!private_data || !private_data_len) | |
416 | return NULL; | |
417 | ||
bed8bdfd | 418 | data = kmemdup(private_data, private_data_len, GFP_KERNEL); |
a977049d HR |
419 | if (!data) |
420 | return ERR_PTR(-ENOMEM); | |
421 | ||
a977049d HR |
422 | return data; |
423 | } | |
424 | ||
425 | static void cm_set_private_data(struct cm_id_private *cm_id_priv, | |
426 | void *private_data, u8 private_data_len) | |
427 | { | |
428 | if (cm_id_priv->private_data && cm_id_priv->private_data_len) | |
429 | kfree(cm_id_priv->private_data); | |
430 | ||
431 | cm_id_priv->private_data = private_data; | |
432 | cm_id_priv->private_data_len = private_data_len; | |
433 | } | |
434 | ||
76039ac9 MZ |
435 | static void cm_set_av_port(struct cm_av *av, struct cm_port *port) |
436 | { | |
437 | struct cm_port *old_port = av->port; | |
438 | ||
439 | if (old_port == port) | |
440 | return; | |
441 | ||
442 | av->port = port; | |
443 | if (old_port) | |
444 | cm_device_put(old_port->cm_dev); | |
445 | if (port) | |
446 | kref_get(&port->cm_dev->kref); | |
447 | } | |
448 | ||
7345201c MZ |
449 | static void cm_init_av_for_lap(struct cm_port *port, struct ib_wc *wc, |
450 | struct rdma_ah_attr *ah_attr, struct cm_av *av) | |
0e225dcb | 451 | { |
76039ac9 | 452 | cm_set_av_port(av, port); |
0e225dcb | 453 | av->pkey_index = wc->pkey_index; |
7345201c | 454 | rdma_move_ah_attr(&av->ah_attr, ah_attr); |
0e225dcb PP |
455 | } |
456 | ||
0c4386ec PP |
457 | static int cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
458 | struct ib_grh *grh, struct cm_av *av) | |
a977049d | 459 | { |
76039ac9 | 460 | cm_set_av_port(av, port); |
a977049d | 461 | av->pkey_index = wc->pkey_index; |
f6bdb142 PP |
462 | return ib_init_ah_attr_from_wc(port->cm_dev->ib_device, |
463 | port->port_num, wc, | |
464 | grh, &av->ah_attr); | |
a977049d HR |
465 | } |
466 | ||
39839107 PP |
467 | static struct cm_port * |
468 | get_cm_port_from_path(struct sa_path_rec *path, const struct ib_gid_attr *attr) | |
a977049d HR |
469 | { |
470 | struct cm_device *cm_dev; | |
471 | struct cm_port *port = NULL; | |
472 | unsigned long flags; | |
39839107 PP |
473 | |
474 | if (attr) { | |
475 | read_lock_irqsave(&cm.device_lock, flags); | |
476 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
477 | if (cm_dev->ib_device == attr->device) { | |
478 | port = cm_dev->port[attr->port_num - 1]; | |
479 | break; | |
480 | } | |
481 | } | |
482 | read_unlock_irqrestore(&cm.device_lock, flags); | |
483 | } else { | |
484 | /* SGID attribute can be NULL in following | |
485 | * conditions. | |
486 | * (a) Alternative path | |
487 | * (b) IB link layer without GRH | |
488 | * (c) LAP send messages | |
489 | */ | |
490 | read_lock_irqsave(&cm.device_lock, flags); | |
491 | list_for_each_entry(cm_dev, &cm.device_list, list) { | |
492 | attr = rdma_find_gid(cm_dev->ib_device, | |
493 | &path->sgid, | |
494 | sa_conv_pathrec_to_gid_type(path), | |
495 | NULL); | |
496 | if (!IS_ERR(attr)) { | |
497 | port = cm_dev->port[attr->port_num - 1]; | |
498 | break; | |
499 | } | |
a977049d | 500 | } |
39839107 PP |
501 | read_unlock_irqrestore(&cm.device_lock, flags); |
502 | if (port) | |
503 | rdma_put_gid_attr(attr); | |
a977049d | 504 | } |
cb12a8e2 PP |
505 | return port; |
506 | } | |
507 | ||
39839107 PP |
508 | static int cm_init_av_by_path(struct sa_path_rec *path, |
509 | const struct ib_gid_attr *sgid_attr, | |
3595c398 | 510 | struct cm_av *av) |
cb12a8e2 | 511 | { |
e822ff21 | 512 | struct rdma_ah_attr new_ah_attr; |
cb12a8e2 PP |
513 | struct cm_device *cm_dev; |
514 | struct cm_port *port; | |
515 | int ret; | |
c2c6ff13 | 516 | |
39839107 | 517 | port = get_cm_port_from_path(path, sgid_attr); |
a977049d HR |
518 | if (!port) |
519 | return -EINVAL; | |
cb12a8e2 | 520 | cm_dev = port->cm_dev; |
a977049d | 521 | |
d4c4196f | 522 | ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num, |
a977049d HR |
523 | be16_to_cpu(path->pkey), &av->pkey_index); |
524 | if (ret) | |
525 | return ret; | |
526 | ||
76039ac9 | 527 | cm_set_av_port(av, port); |
e822ff21 PP |
528 | |
529 | /* | |
530 | * av->ah_attr might be initialized based on wc or during | |
aa74f487 PP |
531 | * request processing time which might have reference to sgid_attr. |
532 | * So initialize a new ah_attr on stack. | |
e822ff21 PP |
533 | * If initialization fails, old ah_attr is used for sending any |
534 | * responses. If initialization is successful, than new ah_attr | |
aa74f487 PP |
535 | * is used by overwriting the old one. So that right ah_attr |
536 | * can be used to return an error response. | |
e822ff21 | 537 | */ |
4ad6a024 | 538 | ret = ib_init_ah_attr_from_path(cm_dev->ib_device, port->port_num, path, |
39839107 | 539 | &new_ah_attr, sgid_attr); |
5cf3968a PP |
540 | if (ret) |
541 | return ret; | |
542 | ||
1d846126 | 543 | av->timeout = path->packet_life_time + 1; |
d97099fe | 544 | rdma_move_ah_attr(&av->ah_attr, &new_ah_attr); |
e822ff21 | 545 | return 0; |
a977049d HR |
546 | } |
547 | ||
7345201c MZ |
548 | /* Move av created by cm_init_av_by_path(), so av.dgid is not moved */ |
549 | static void cm_move_av_from_path(struct cm_av *dest, struct cm_av *src) | |
550 | { | |
76039ac9 MZ |
551 | cm_set_av_port(dest, src->port); |
552 | cm_set_av_port(src, NULL); | |
7345201c MZ |
553 | dest->pkey_index = src->pkey_index; |
554 | rdma_move_ah_attr(&dest->ah_attr, &src->ah_attr); | |
555 | dest->timeout = src->timeout; | |
556 | } | |
557 | ||
558 | static void cm_destroy_av(struct cm_av *av) | |
559 | { | |
560 | rdma_destroy_ah_attr(&av->ah_attr); | |
76039ac9 | 561 | cm_set_av_port(av, NULL); |
7345201c MZ |
562 | } |
563 | ||
ae78ff3a MW |
564 | static u32 cm_local_id(__be32 local_id) |
565 | { | |
566 | return (__force u32) (local_id ^ cm.random_id_operand); | |
a977049d HR |
567 | } |
568 | ||
4d6e8a03 | 569 | static struct cm_id_private *cm_acquire_id(__be32 local_id, __be32 remote_id) |
a977049d HR |
570 | { |
571 | struct cm_id_private *cm_id_priv; | |
572 | ||
4d6e8a03 | 573 | rcu_read_lock(); |
ae78ff3a | 574 | cm_id_priv = xa_load(&cm.local_id_table, cm_local_id(local_id)); |
4d6e8a03 DG |
575 | if (!cm_id_priv || cm_id_priv->id.remote_id != remote_id || |
576 | !refcount_inc_not_zero(&cm_id_priv->refcount)) | |
577 | cm_id_priv = NULL; | |
578 | rcu_read_unlock(); | |
a977049d HR |
579 | |
580 | return cm_id_priv; | |
581 | } | |
582 | ||
a88f4888 RD |
583 | /* |
584 | * Trivial helpers to strip endian annotation and compare; the | |
585 | * endianness doesn't actually matter since we just need a stable | |
586 | * order for the RB tree. | |
587 | */ | |
588 | static int be32_lt(__be32 a, __be32 b) | |
589 | { | |
590 | return (__force u32) a < (__force u32) b; | |
591 | } | |
592 | ||
593 | static int be32_gt(__be32 a, __be32 b) | |
594 | { | |
595 | return (__force u32) a > (__force u32) b; | |
596 | } | |
597 | ||
598 | static int be64_lt(__be64 a, __be64 b) | |
599 | { | |
600 | return (__force u64) a < (__force u64) b; | |
601 | } | |
602 | ||
603 | static int be64_gt(__be64 a, __be64 b) | |
604 | { | |
605 | return (__force u64) a > (__force u64) b; | |
606 | } | |
607 | ||
98f67156 JG |
608 | /* |
609 | * Inserts a new cm_id_priv into the listen_service_table. Returns cm_id_priv | |
610 | * if the new ID was inserted, NULL if it could not be inserted due to a | |
611 | * collision, or the existing cm_id_priv ready for shared usage. | |
612 | */ | |
613 | static struct cm_id_private *cm_insert_listen(struct cm_id_private *cm_id_priv, | |
614 | ib_cm_handler shared_handler) | |
a977049d HR |
615 | { |
616 | struct rb_node **link = &cm.listen_service_table.rb_node; | |
617 | struct rb_node *parent = NULL; | |
618 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 SH |
619 | __be64 service_id = cm_id_priv->id.service_id; |
620 | __be64 service_mask = cm_id_priv->id.service_mask; | |
98f67156 | 621 | unsigned long flags; |
a977049d | 622 | |
98f67156 | 623 | spin_lock_irqsave(&cm.lock, flags); |
a977049d HR |
624 | while (*link) { |
625 | parent = *link; | |
626 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
627 | service_node); | |
628 | if ((cur_cm_id_priv->id.service_mask & service_id) == | |
07d357d0 | 629 | (service_mask & cur_cm_id_priv->id.service_id) && |
98f67156 JG |
630 | (cm_id_priv->id.device == cur_cm_id_priv->id.device)) { |
631 | /* | |
632 | * Sharing an ib_cm_id with different handlers is not | |
633 | * supported | |
634 | */ | |
635 | if (cur_cm_id_priv->id.cm_handler != shared_handler || | |
636 | cur_cm_id_priv->id.context || | |
637 | WARN_ON(!cur_cm_id_priv->id.cm_handler)) { | |
638 | spin_unlock_irqrestore(&cm.lock, flags); | |
639 | return NULL; | |
640 | } | |
641 | refcount_inc(&cur_cm_id_priv->refcount); | |
642 | cur_cm_id_priv->listen_sharecount++; | |
643 | spin_unlock_irqrestore(&cm.lock, flags); | |
07d357d0 | 644 | return cur_cm_id_priv; |
98f67156 | 645 | } |
07d357d0 SH |
646 | |
647 | if (cm_id_priv->id.device < cur_cm_id_priv->id.device) | |
648 | link = &(*link)->rb_left; | |
649 | else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) | |
650 | link = &(*link)->rb_right; | |
a88f4888 | 651 | else if (be64_lt(service_id, cur_cm_id_priv->id.service_id)) |
a977049d | 652 | link = &(*link)->rb_left; |
a88f4888 | 653 | else if (be64_gt(service_id, cur_cm_id_priv->id.service_id)) |
6e61d04f | 654 | link = &(*link)->rb_right; |
a977049d HR |
655 | else |
656 | link = &(*link)->rb_right; | |
657 | } | |
98f67156 | 658 | cm_id_priv->listen_sharecount++; |
a977049d HR |
659 | rb_link_node(&cm_id_priv->service_node, parent, link); |
660 | rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); | |
98f67156 JG |
661 | spin_unlock_irqrestore(&cm.lock, flags); |
662 | return cm_id_priv; | |
a977049d HR |
663 | } |
664 | ||
f681967a WL |
665 | static struct cm_id_private *cm_find_listen(struct ib_device *device, |
666 | __be64 service_id) | |
a977049d HR |
667 | { |
668 | struct rb_node *node = cm.listen_service_table.rb_node; | |
669 | struct cm_id_private *cm_id_priv; | |
670 | ||
671 | while (node) { | |
672 | cm_id_priv = rb_entry(node, struct cm_id_private, service_node); | |
673 | if ((cm_id_priv->id.service_mask & service_id) == | |
07d357d0 | 674 | cm_id_priv->id.service_id && |
a0e46db4 JG |
675 | (cm_id_priv->id.device == device)) { |
676 | refcount_inc(&cm_id_priv->refcount); | |
a977049d | 677 | return cm_id_priv; |
a0e46db4 | 678 | } |
07d357d0 SH |
679 | if (device < cm_id_priv->id.device) |
680 | node = node->rb_left; | |
681 | else if (device > cm_id_priv->id.device) | |
682 | node = node->rb_right; | |
a88f4888 | 683 | else if (be64_lt(service_id, cm_id_priv->id.service_id)) |
a977049d | 684 | node = node->rb_left; |
a88f4888 | 685 | else if (be64_gt(service_id, cm_id_priv->id.service_id)) |
6e61d04f | 686 | node = node->rb_right; |
a977049d HR |
687 | else |
688 | node = node->rb_right; | |
689 | } | |
690 | return NULL; | |
691 | } | |
692 | ||
f681967a WL |
693 | static struct cm_timewait_info * |
694 | cm_insert_remote_id(struct cm_timewait_info *timewait_info) | |
a977049d HR |
695 | { |
696 | struct rb_node **link = &cm.remote_id_table.rb_node; | |
697 | struct rb_node *parent = NULL; | |
698 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
699 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
700 | __be32 remote_id = timewait_info->work.remote_id; | |
a977049d HR |
701 | |
702 | while (*link) { | |
703 | parent = *link; | |
704 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
705 | remote_id_node); | |
a88f4888 | 706 | if (be32_lt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 707 | link = &(*link)->rb_left; |
a88f4888 | 708 | else if (be32_gt(remote_id, cur_timewait_info->work.remote_id)) |
a977049d | 709 | link = &(*link)->rb_right; |
a88f4888 | 710 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 711 | link = &(*link)->rb_left; |
a88f4888 | 712 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
713 | link = &(*link)->rb_right; |
714 | else | |
715 | return cur_timewait_info; | |
716 | } | |
717 | timewait_info->inserted_remote_id = 1; | |
718 | rb_link_node(&timewait_info->remote_id_node, parent, link); | |
719 | rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); | |
720 | return NULL; | |
721 | } | |
722 | ||
cfa68b0d JG |
723 | static struct cm_id_private *cm_find_remote_id(__be64 remote_ca_guid, |
724 | __be32 remote_id) | |
a977049d HR |
725 | { |
726 | struct rb_node *node = cm.remote_id_table.rb_node; | |
727 | struct cm_timewait_info *timewait_info; | |
cfa68b0d | 728 | struct cm_id_private *res = NULL; |
a977049d | 729 | |
cfa68b0d | 730 | spin_lock_irq(&cm.lock); |
a977049d HR |
731 | while (node) { |
732 | timewait_info = rb_entry(node, struct cm_timewait_info, | |
733 | remote_id_node); | |
a88f4888 | 734 | if (be32_lt(remote_id, timewait_info->work.remote_id)) |
a977049d | 735 | node = node->rb_left; |
a88f4888 | 736 | else if (be32_gt(remote_id, timewait_info->work.remote_id)) |
a977049d | 737 | node = node->rb_right; |
a88f4888 | 738 | else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d | 739 | node = node->rb_left; |
a88f4888 | 740 | else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid)) |
a977049d | 741 | node = node->rb_right; |
cfa68b0d JG |
742 | else { |
743 | res = cm_acquire_id(timewait_info->work.local_id, | |
744 | timewait_info->work.remote_id); | |
745 | break; | |
746 | } | |
a977049d | 747 | } |
cfa68b0d JG |
748 | spin_unlock_irq(&cm.lock); |
749 | return res; | |
a977049d HR |
750 | } |
751 | ||
f681967a WL |
752 | static struct cm_timewait_info * |
753 | cm_insert_remote_qpn(struct cm_timewait_info *timewait_info) | |
a977049d HR |
754 | { |
755 | struct rb_node **link = &cm.remote_qp_table.rb_node; | |
756 | struct rb_node *parent = NULL; | |
757 | struct cm_timewait_info *cur_timewait_info; | |
97f52eb4 SH |
758 | __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
759 | __be32 remote_qpn = timewait_info->remote_qpn; | |
a977049d HR |
760 | |
761 | while (*link) { | |
762 | parent = *link; | |
763 | cur_timewait_info = rb_entry(parent, struct cm_timewait_info, | |
764 | remote_qp_node); | |
a88f4888 | 765 | if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 766 | link = &(*link)->rb_left; |
a88f4888 | 767 | else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn)) |
a977049d | 768 | link = &(*link)->rb_right; |
a88f4888 | 769 | else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d | 770 | link = &(*link)->rb_left; |
a88f4888 | 771 | else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) |
a977049d HR |
772 | link = &(*link)->rb_right; |
773 | else | |
774 | return cur_timewait_info; | |
775 | } | |
776 | timewait_info->inserted_remote_qp = 1; | |
777 | rb_link_node(&timewait_info->remote_qp_node, parent, link); | |
778 | rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
779 | return NULL; | |
780 | } | |
781 | ||
f681967a WL |
782 | static struct cm_id_private * |
783 | cm_insert_remote_sidr(struct cm_id_private *cm_id_priv) | |
a977049d HR |
784 | { |
785 | struct rb_node **link = &cm.remote_sidr_table.rb_node; | |
786 | struct rb_node *parent = NULL; | |
787 | struct cm_id_private *cur_cm_id_priv; | |
97f52eb4 | 788 | __be32 remote_id = cm_id_priv->id.remote_id; |
a977049d HR |
789 | |
790 | while (*link) { | |
791 | parent = *link; | |
792 | cur_cm_id_priv = rb_entry(parent, struct cm_id_private, | |
793 | sidr_id_node); | |
a88f4888 | 794 | if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d | 795 | link = &(*link)->rb_left; |
a88f4888 | 796 | else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id)) |
a977049d HR |
797 | link = &(*link)->rb_right; |
798 | else { | |
bf0480a2 | 799 | if (cur_cm_id_priv->sidr_slid < cm_id_priv->sidr_slid) |
a977049d | 800 | link = &(*link)->rb_left; |
bf0480a2 | 801 | else if (cur_cm_id_priv->sidr_slid > cm_id_priv->sidr_slid) |
a977049d HR |
802 | link = &(*link)->rb_right; |
803 | else | |
804 | return cur_cm_id_priv; | |
805 | } | |
806 | } | |
807 | rb_link_node(&cm_id_priv->sidr_id_node, parent, link); | |
808 | rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
809 | return NULL; | |
810 | } | |
811 | ||
98f67156 JG |
812 | static struct cm_id_private *cm_alloc_id_priv(struct ib_device *device, |
813 | ib_cm_handler cm_handler, | |
814 | void *context) | |
a977049d HR |
815 | { |
816 | struct cm_id_private *cm_id_priv; | |
e8dc4e88 | 817 | u32 id; |
a977049d HR |
818 | int ret; |
819 | ||
de6eb66b | 820 | cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
a977049d HR |
821 | if (!cm_id_priv) |
822 | return ERR_PTR(-ENOMEM); | |
823 | ||
a977049d | 824 | cm_id_priv->id.state = IB_CM_IDLE; |
07d357d0 | 825 | cm_id_priv->id.device = device; |
a977049d HR |
826 | cm_id_priv->id.cm_handler = cm_handler; |
827 | cm_id_priv->id.context = context; | |
354ba39c | 828 | cm_id_priv->id.remote_cm_qpn = 1; |
a977049d | 829 | |
2305d686 JG |
830 | RB_CLEAR_NODE(&cm_id_priv->service_node); |
831 | RB_CLEAR_NODE(&cm_id_priv->sidr_id_node); | |
a977049d | 832 | spin_lock_init(&cm_id_priv->lock); |
1b52fa98 | 833 | init_completion(&cm_id_priv->comp); |
a977049d HR |
834 | INIT_LIST_HEAD(&cm_id_priv->work_list); |
835 | atomic_set(&cm_id_priv->work_count, -1); | |
0acc637d | 836 | refcount_set(&cm_id_priv->refcount, 1); |
e8dc4e88 | 837 | |
eb73060b JG |
838 | ret = xa_alloc_cyclic(&cm.local_id_table, &id, NULL, xa_limit_32b, |
839 | &cm.local_id_next, GFP_KERNEL); | |
98365351 | 840 | if (ret < 0) |
e8dc4e88 JG |
841 | goto error; |
842 | cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; | |
e8dc4e88 | 843 | |
98f67156 | 844 | return cm_id_priv; |
a977049d HR |
845 | |
846 | error: | |
847 | kfree(cm_id_priv); | |
e8dc4e88 | 848 | return ERR_PTR(ret); |
a977049d | 849 | } |
98f67156 JG |
850 | |
851 | /* | |
852 | * Make the ID visible to the MAD handlers and other threads that use the | |
853 | * xarray. | |
854 | */ | |
855 | static void cm_finalize_id(struct cm_id_private *cm_id_priv) | |
856 | { | |
eb73060b JG |
857 | xa_store(&cm.local_id_table, cm_local_id(cm_id_priv->id.local_id), |
858 | cm_id_priv, GFP_ATOMIC); | |
98f67156 JG |
859 | } |
860 | ||
861 | struct ib_cm_id *ib_create_cm_id(struct ib_device *device, | |
862 | ib_cm_handler cm_handler, | |
863 | void *context) | |
864 | { | |
865 | struct cm_id_private *cm_id_priv; | |
866 | ||
867 | cm_id_priv = cm_alloc_id_priv(device, cm_handler, context); | |
868 | if (IS_ERR(cm_id_priv)) | |
869 | return ERR_CAST(cm_id_priv); | |
870 | ||
871 | cm_finalize_id(cm_id_priv); | |
872 | return &cm_id_priv->id; | |
873 | } | |
a977049d HR |
874 | EXPORT_SYMBOL(ib_create_cm_id); |
875 | ||
f681967a | 876 | static struct cm_work *cm_dequeue_work(struct cm_id_private *cm_id_priv) |
a977049d HR |
877 | { |
878 | struct cm_work *work; | |
879 | ||
880 | if (list_empty(&cm_id_priv->work_list)) | |
881 | return NULL; | |
882 | ||
883 | work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); | |
884 | list_del(&work->list); | |
885 | return work; | |
886 | } | |
887 | ||
888 | static void cm_free_work(struct cm_work *work) | |
889 | { | |
890 | if (work->mad_recv_wc) | |
891 | ib_free_recv_mad(work->mad_recv_wc); | |
892 | kfree(work); | |
893 | } | |
894 | ||
e83f195a JG |
895 | static void cm_queue_work_unlock(struct cm_id_private *cm_id_priv, |
896 | struct cm_work *work) | |
1ea7c546 | 897 | __releases(&cm_id_priv->lock) |
e83f195a JG |
898 | { |
899 | bool immediate; | |
900 | ||
901 | /* | |
902 | * To deliver the event to the user callback we have the drop the | |
903 | * spinlock, however, we need to ensure that the user callback is single | |
904 | * threaded and receives events in the temporal order. If there are | |
905 | * already events being processed then thread new events onto a list, | |
906 | * the thread currently processing will pick them up. | |
907 | */ | |
908 | immediate = atomic_inc_and_test(&cm_id_priv->work_count); | |
909 | if (!immediate) { | |
910 | list_add_tail(&work->list, &cm_id_priv->work_list); | |
911 | /* | |
912 | * This routine always consumes incoming reference. Once queued | |
913 | * to the work_list then a reference is held by the thread | |
914 | * currently running cm_process_work() and this reference is not | |
915 | * needed. | |
916 | */ | |
917 | cm_deref_id(cm_id_priv); | |
918 | } | |
919 | spin_unlock_irq(&cm_id_priv->lock); | |
920 | ||
921 | if (immediate) | |
922 | cm_process_work(cm_id_priv, work); | |
923 | } | |
924 | ||
a977049d HR |
925 | static inline int cm_convert_to_ms(int iba_time) |
926 | { | |
927 | /* approximate conversion to ms from 4.096us x 2^iba_time */ | |
928 | return 1 << max(iba_time - 8, 0); | |
929 | } | |
930 | ||
1d846126 SH |
931 | /* |
932 | * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time | |
933 | * Because of how ack_timeout is stored, adding one doubles the timeout. | |
934 | * To avoid large timeouts, select the max(ack_delay, life_time + 1), and | |
935 | * increment it (round up) only if the other is within 50%. | |
936 | */ | |
937 | static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) | |
938 | { | |
939 | int ack_timeout = packet_life_time + 1; | |
940 | ||
941 | if (ack_timeout >= ca_ack_delay) | |
942 | ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); | |
943 | else | |
944 | ack_timeout = ca_ack_delay + | |
945 | (ack_timeout >= (ca_ack_delay - 1)); | |
946 | ||
947 | return min(31, ack_timeout); | |
948 | } | |
949 | ||
9767a27e | 950 | static void cm_remove_remote(struct cm_id_private *cm_id_priv) |
a977049d | 951 | { |
9767a27e JG |
952 | struct cm_timewait_info *timewait_info = cm_id_priv->timewait_info; |
953 | ||
a977049d HR |
954 | if (timewait_info->inserted_remote_id) { |
955 | rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); | |
956 | timewait_info->inserted_remote_id = 0; | |
957 | } | |
958 | ||
959 | if (timewait_info->inserted_remote_qp) { | |
960 | rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); | |
961 | timewait_info->inserted_remote_qp = 0; | |
962 | } | |
a977049d HR |
963 | } |
964 | ||
f681967a | 965 | static struct cm_timewait_info *cm_create_timewait_info(__be32 local_id) |
a977049d HR |
966 | { |
967 | struct cm_timewait_info *timewait_info; | |
968 | ||
de6eb66b | 969 | timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
a977049d HR |
970 | if (!timewait_info) |
971 | return ERR_PTR(-ENOMEM); | |
a977049d HR |
972 | |
973 | timewait_info->work.local_id = local_id; | |
c4028958 | 974 | INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
a977049d HR |
975 | timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
976 | return timewait_info; | |
977 | } | |
978 | ||
979 | static void cm_enter_timewait(struct cm_id_private *cm_id_priv) | |
980 | { | |
981 | int wait_time; | |
8575329d | 982 | unsigned long flags; |
be4b4993 ES |
983 | struct cm_device *cm_dev; |
984 | ||
00777a68 JG |
985 | lockdep_assert_held(&cm_id_priv->lock); |
986 | ||
be4b4993 ES |
987 | cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client); |
988 | if (!cm_dev) | |
989 | return; | |
a977049d | 990 | |
8575329d | 991 | spin_lock_irqsave(&cm.lock, flags); |
9767a27e | 992 | cm_remove_remote(cm_id_priv); |
8575329d SH |
993 | list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
994 | spin_unlock_irqrestore(&cm.lock, flags); | |
a70d0590 | 995 | |
a977049d HR |
996 | /* |
997 | * The cm_id could be destroyed by the user before we exit timewait. | |
998 | * To protect against this, we search for the cm_id after exiting | |
999 | * timewait before notifying the user that we've exited timewait. | |
1000 | */ | |
1001 | cm_id_priv->id.state = IB_CM_TIMEWAIT; | |
1d846126 | 1002 | wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
be4b4993 ES |
1003 | |
1004 | /* Check if the device started its remove_one */ | |
4bfdf635 | 1005 | spin_lock_irqsave(&cm.lock, flags); |
be4b4993 ES |
1006 | if (!cm_dev->going_down) |
1007 | queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, | |
1008 | msecs_to_jiffies(wait_time)); | |
4bfdf635 | 1009 | spin_unlock_irqrestore(&cm.lock, flags); |
be4b4993 | 1010 | |
09fb406a JG |
1011 | /* |
1012 | * The timewait_info is converted into a work and gets freed during | |
1013 | * cm_free_work() in cm_timewait_handler(). | |
1014 | */ | |
1015 | BUILD_BUG_ON(offsetof(struct cm_timewait_info, work) != 0); | |
a977049d HR |
1016 | cm_id_priv->timewait_info = NULL; |
1017 | } | |
1018 | ||
1019 | static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) | |
1020 | { | |
8575329d SH |
1021 | unsigned long flags; |
1022 | ||
00777a68 JG |
1023 | lockdep_assert_held(&cm_id_priv->lock); |
1024 | ||
a977049d HR |
1025 | cm_id_priv->id.state = IB_CM_IDLE; |
1026 | if (cm_id_priv->timewait_info) { | |
8575329d | 1027 | spin_lock_irqsave(&cm.lock, flags); |
9767a27e | 1028 | cm_remove_remote(cm_id_priv); |
8575329d | 1029 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d HR |
1030 | kfree(cm_id_priv->timewait_info); |
1031 | cm_id_priv->timewait_info = NULL; | |
1032 | } | |
1033 | } | |
1034 | ||
04c33543 | 1035 | static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
a977049d HR |
1036 | { |
1037 | struct cm_id_private *cm_id_priv; | |
1038 | struct cm_work *work; | |
a977049d HR |
1039 | |
1040 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
24be6e81 | 1041 | spin_lock_irq(&cm_id_priv->lock); |
67b3c8dc | 1042 | retest: |
a977049d HR |
1043 | switch (cm_id->state) { |
1044 | case IB_CM_LISTEN: | |
67b3c8dc | 1045 | spin_lock(&cm.lock); |
067b171b HE |
1046 | if (--cm_id_priv->listen_sharecount > 0) { |
1047 | /* The id is still shared. */ | |
2305d686 | 1048 | WARN_ON(refcount_read(&cm_id_priv->refcount) == 1); |
67b3c8dc JG |
1049 | spin_unlock(&cm.lock); |
1050 | spin_unlock_irq(&cm_id_priv->lock); | |
067b171b | 1051 | cm_deref_id(cm_id_priv); |
067b171b HE |
1052 | return; |
1053 | } | |
67b3c8dc | 1054 | cm_id->state = IB_CM_IDLE; |
a977049d | 1055 | rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
2305d686 | 1056 | RB_CLEAR_NODE(&cm_id_priv->service_node); |
67b3c8dc | 1057 | spin_unlock(&cm.lock); |
a977049d HR |
1058 | break; |
1059 | case IB_CM_SIDR_REQ_SENT: | |
1060 | cm_id->state = IB_CM_IDLE; | |
70076a41 | 1061 | ib_cancel_mad(cm_id_priv->msg); |
a977049d HR |
1062 | break; |
1063 | case IB_CM_SIDR_REQ_RCVD: | |
6a8824a7 JG |
1064 | cm_send_sidr_rep_locked(cm_id_priv, |
1065 | &(struct ib_cm_sidr_rep_param){ | |
1066 | .status = IB_SIDR_REJECT }); | |
67b3c8dc JG |
1067 | /* cm_send_sidr_rep_locked will not move to IDLE if it fails */ |
1068 | cm_id->state = IB_CM_IDLE; | |
a977049d HR |
1069 | break; |
1070 | case IB_CM_REQ_SENT: | |
c29ed5a4 | 1071 | case IB_CM_MRA_REQ_RCVD: |
70076a41 | 1072 | ib_cancel_mad(cm_id_priv->msg); |
81ddb41f JG |
1073 | cm_send_rej_locked(cm_id_priv, IB_CM_REJ_TIMEOUT, |
1074 | &cm_id_priv->id.device->node_guid, | |
1075 | sizeof(cm_id_priv->id.device->node_guid), | |
1076 | NULL, 0); | |
227eca83 | 1077 | break; |
04c33543 MT |
1078 | case IB_CM_REQ_RCVD: |
1079 | if (err == -ENOMEM) { | |
1080 | /* Do not reject to allow future retries. */ | |
1081 | cm_reset_to_idle(cm_id_priv); | |
04c33543 | 1082 | } else { |
81ddb41f JG |
1083 | cm_send_rej_locked(cm_id_priv, |
1084 | IB_CM_REJ_CONSUMER_DEFINED, NULL, 0, | |
1085 | NULL, 0); | |
04c33543 MT |
1086 | } |
1087 | break; | |
a977049d HR |
1088 | case IB_CM_REP_SENT: |
1089 | case IB_CM_MRA_REP_RCVD: | |
70076a41 | 1090 | ib_cancel_mad(cm_id_priv->msg); |
fba97dc7 KCP |
1091 | cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL, |
1092 | 0, NULL, 0); | |
1093 | goto retest; | |
a977049d HR |
1094 | case IB_CM_MRA_REQ_SENT: |
1095 | case IB_CM_REP_RCVD: | |
1096 | case IB_CM_MRA_REP_SENT: | |
81ddb41f JG |
1097 | cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL, |
1098 | 0, NULL, 0); | |
a977049d HR |
1099 | break; |
1100 | case IB_CM_ESTABLISHED: | |
e029fdc0 | 1101 | if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) { |
67b3c8dc | 1102 | cm_id->state = IB_CM_IDLE; |
2622e18e | 1103 | break; |
e029fdc0 JG |
1104 | } |
1105 | cm_send_dreq_locked(cm_id_priv, NULL, 0); | |
a977049d HR |
1106 | goto retest; |
1107 | case IB_CM_DREQ_SENT: | |
70076a41 | 1108 | ib_cancel_mad(cm_id_priv->msg); |
a977049d | 1109 | cm_enter_timewait(cm_id_priv); |
67b3c8dc | 1110 | goto retest; |
a977049d | 1111 | case IB_CM_DREQ_RCVD: |
87cabf3e | 1112 | cm_send_drep_locked(cm_id_priv, NULL, 0); |
67b3c8dc JG |
1113 | WARN_ON(cm_id->state != IB_CM_TIMEWAIT); |
1114 | goto retest; | |
1115 | case IB_CM_TIMEWAIT: | |
1116 | /* | |
1117 | * The cm_acquire_id in cm_timewait_handler will stop working | |
1cc44279 | 1118 | * once we do xa_erase below, so just move to idle here for |
67b3c8dc JG |
1119 | * consistency. |
1120 | */ | |
1121 | cm_id->state = IB_CM_IDLE; | |
a977049d | 1122 | break; |
67b3c8dc | 1123 | case IB_CM_IDLE: |
a977049d HR |
1124 | break; |
1125 | } | |
67b3c8dc | 1126 | WARN_ON(cm_id->state != IB_CM_IDLE); |
a977049d | 1127 | |
bede86a3 JG |
1128 | spin_lock(&cm.lock); |
1129 | /* Required for cleanup paths related cm_req_handler() */ | |
1130 | if (cm_id_priv->timewait_info) { | |
9767a27e | 1131 | cm_remove_remote(cm_id_priv); |
bede86a3 JG |
1132 | kfree(cm_id_priv->timewait_info); |
1133 | cm_id_priv->timewait_info = NULL; | |
1134 | } | |
3595c398 | 1135 | |
2305d686 JG |
1136 | WARN_ON(cm_id_priv->listen_sharecount); |
1137 | WARN_ON(!RB_EMPTY_NODE(&cm_id_priv->service_node)); | |
1138 | if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) | |
1139 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
bede86a3 JG |
1140 | spin_unlock(&cm.lock); |
1141 | spin_unlock_irq(&cm_id_priv->lock); | |
9db0ff53 | 1142 | |
eb73060b | 1143 | xa_erase(&cm.local_id_table, cm_local_id(cm_id->local_id)); |
1b52fa98 SH |
1144 | cm_deref_id(cm_id_priv); |
1145 | wait_for_completion(&cm_id_priv->comp); | |
a977049d HR |
1146 | while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
1147 | cm_free_work(work); | |
b7403217 | 1148 | |
7345201c MZ |
1149 | cm_destroy_av(&cm_id_priv->av); |
1150 | cm_destroy_av(&cm_id_priv->alt_av); | |
6e61d04f | 1151 | kfree(cm_id_priv->private_data); |
4d6e8a03 | 1152 | kfree_rcu(cm_id_priv, rcu); |
a977049d | 1153 | } |
04c33543 MT |
1154 | |
1155 | void ib_destroy_cm_id(struct ib_cm_id *cm_id) | |
1156 | { | |
1157 | cm_destroy_id(cm_id, 0); | |
1158 | } | |
a977049d HR |
1159 | EXPORT_SYMBOL(ib_destroy_cm_id); |
1160 | ||
98f67156 JG |
1161 | static int cm_init_listen(struct cm_id_private *cm_id_priv, __be64 service_id, |
1162 | __be64 service_mask) | |
1163 | { | |
1164 | service_mask = service_mask ? service_mask : ~cpu_to_be64(0); | |
1165 | service_id &= service_mask; | |
1166 | if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && | |
1167 | (service_id != IB_CM_ASSIGN_SERVICE_ID)) | |
1168 | return -EINVAL; | |
1169 | ||
1170 | if (service_id == IB_CM_ASSIGN_SERVICE_ID) { | |
1171 | cm_id_priv->id.service_id = cpu_to_be64(cm.listen_service_id++); | |
1172 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); | |
1173 | } else { | |
1174 | cm_id_priv->id.service_id = service_id; | |
1175 | cm_id_priv->id.service_mask = service_mask; | |
1176 | } | |
1177 | return 0; | |
1178 | } | |
1179 | ||
067b171b | 1180 | /** |
98f67156 | 1181 | * ib_cm_listen - Initiates listening on the specified service ID for |
067b171b HE |
1182 | * connection and service ID resolution requests. |
1183 | * @cm_id: Connection identifier associated with the listen request. | |
1184 | * @service_id: Service identifier matched against incoming connection | |
1185 | * and service ID resolution requests. The service ID should be specified | |
1186 | * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will | |
1187 | * assign a service ID to the caller. | |
1188 | * @service_mask: Mask applied to service ID used to listen across a | |
1189 | * range of service IDs. If set to 0, the service ID is matched | |
1190 | * exactly. This parameter is ignored if %service_id is set to | |
1191 | * IB_CM_ASSIGN_SERVICE_ID. | |
067b171b | 1192 | */ |
98f67156 | 1193 | int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask) |
a977049d | 1194 | { |
98f67156 JG |
1195 | struct cm_id_private *cm_id_priv = |
1196 | container_of(cm_id, struct cm_id_private, id); | |
1197 | unsigned long flags; | |
1198 | int ret; | |
73fec7fd | 1199 | |
98f67156 JG |
1200 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
1201 | if (cm_id_priv->id.state != IB_CM_IDLE) { | |
1202 | ret = -EINVAL; | |
1203 | goto out; | |
a977049d | 1204 | } |
a977049d | 1205 | |
98f67156 JG |
1206 | ret = cm_init_listen(cm_id_priv, service_id, service_mask); |
1207 | if (ret) | |
1208 | goto out; | |
1209 | ||
1210 | if (!cm_insert_listen(cm_id_priv, NULL)) { | |
a977049d | 1211 | ret = -EBUSY; |
98f67156 | 1212 | goto out; |
a977049d | 1213 | } |
73fec7fd | 1214 | |
98f67156 JG |
1215 | cm_id_priv->id.state = IB_CM_LISTEN; |
1216 | ret = 0; | |
73fec7fd | 1217 | |
98f67156 JG |
1218 | out: |
1219 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
73fec7fd | 1220 | return ret; |
067b171b | 1221 | } |
a977049d HR |
1222 | EXPORT_SYMBOL(ib_cm_listen); |
1223 | ||
067b171b | 1224 | /** |
2988ca08 MCC |
1225 | * ib_cm_insert_listen - Create a new listening ib_cm_id and listen on |
1226 | * the given service ID. | |
067b171b HE |
1227 | * |
1228 | * If there's an existing ID listening on that same device and service ID, | |
1229 | * return it. | |
1230 | * | |
1231 | * @device: Device associated with the cm_id. All related communication will | |
1232 | * be associated with the specified device. | |
1233 | * @cm_handler: Callback invoked to notify the user of CM events. | |
1234 | * @service_id: Service identifier matched against incoming connection | |
1235 | * and service ID resolution requests. The service ID should be specified | |
1236 | * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will | |
1237 | * assign a service ID to the caller. | |
1238 | * | |
1239 | * Callers should call ib_destroy_cm_id when done with the listener ID. | |
1240 | */ | |
1241 | struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device, | |
1242 | ib_cm_handler cm_handler, | |
1243 | __be64 service_id) | |
1244 | { | |
98f67156 | 1245 | struct cm_id_private *listen_id_priv; |
067b171b | 1246 | struct cm_id_private *cm_id_priv; |
067b171b HE |
1247 | int err = 0; |
1248 | ||
1249 | /* Create an ID in advance, since the creation may sleep */ | |
98f67156 JG |
1250 | cm_id_priv = cm_alloc_id_priv(device, cm_handler, NULL); |
1251 | if (IS_ERR(cm_id_priv)) | |
1252 | return ERR_CAST(cm_id_priv); | |
067b171b | 1253 | |
98f67156 JG |
1254 | err = cm_init_listen(cm_id_priv, service_id, 0); |
1255 | if (err) | |
1256 | return ERR_PTR(err); | |
067b171b | 1257 | |
98f67156 JG |
1258 | spin_lock_irq(&cm_id_priv->lock); |
1259 | listen_id_priv = cm_insert_listen(cm_id_priv, cm_handler); | |
1260 | if (listen_id_priv != cm_id_priv) { | |
1261 | spin_unlock_irq(&cm_id_priv->lock); | |
1262 | ib_destroy_cm_id(&cm_id_priv->id); | |
1263 | if (!listen_id_priv) | |
067b171b | 1264 | return ERR_PTR(-EINVAL); |
98f67156 | 1265 | return &listen_id_priv->id; |
067b171b | 1266 | } |
98f67156 JG |
1267 | cm_id_priv->id.state = IB_CM_LISTEN; |
1268 | spin_unlock_irq(&cm_id_priv->lock); | |
067b171b | 1269 | |
98f67156 JG |
1270 | /* |
1271 | * A listen ID does not need to be in the xarray since it does not | |
1272 | * receive mads, is not placed in the remote_id or remote_qpn rbtree, | |
1273 | * and does not enter timewait. | |
1274 | */ | |
067b171b | 1275 | |
98f67156 | 1276 | return &cm_id_priv->id; |
067b171b HE |
1277 | } |
1278 | EXPORT_SYMBOL(ib_cm_insert_listen); | |
1279 | ||
87a37ce9 | 1280 | static __be64 cm_form_tid(struct cm_id_private *cm_id_priv) |
a977049d | 1281 | { |
76039ac9 MZ |
1282 | u64 hi_tid = 0, low_tid; |
1283 | ||
1284 | lockdep_assert_held(&cm_id_priv->lock); | |
1285 | ||
1286 | low_tid = (u64)cm_id_priv->id.local_id; | |
1287 | if (!cm_id_priv->av.port) | |
1288 | return cpu_to_be64(low_tid); | |
a977049d | 1289 | |
76039ac9 MZ |
1290 | spin_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); |
1291 | if (cm_id_priv->av.port->mad_agent) | |
1292 | hi_tid = ((u64)cm_id_priv->av.port->mad_agent->hi_tid) << 32; | |
1293 | spin_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); | |
a977049d HR |
1294 | return cpu_to_be64(hi_tid | low_tid); |
1295 | } | |
1296 | ||
1297 | static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, | |
97f52eb4 | 1298 | __be16 attr_id, __be64 tid) |
a977049d HR |
1299 | { |
1300 | hdr->base_version = IB_MGMT_BASE_VERSION; | |
1301 | hdr->mgmt_class = IB_MGMT_CLASS_CM; | |
1302 | hdr->class_version = IB_CM_CLASS_VERSION; | |
1303 | hdr->method = IB_MGMT_METHOD_SEND; | |
1304 | hdr->attr_id = attr_id; | |
1305 | hdr->tid = tid; | |
1306 | } | |
1307 | ||
a20652e1 LR |
1308 | static void cm_format_mad_ece_hdr(struct ib_mad_hdr *hdr, __be16 attr_id, |
1309 | __be64 tid, u32 attr_mod) | |
1310 | { | |
1311 | cm_format_mad_hdr(hdr, attr_id, tid); | |
1312 | hdr->attr_mod = cpu_to_be32(attr_mod); | |
1313 | } | |
1314 | ||
a977049d HR |
1315 | static void cm_format_req(struct cm_req_msg *req_msg, |
1316 | struct cm_id_private *cm_id_priv, | |
1317 | struct ib_cm_req_param *param) | |
1318 | { | |
c2f8fc4e DC |
1319 | struct sa_path_rec *pri_path = param->primary_path; |
1320 | struct sa_path_rec *alt_path = param->alternate_path; | |
e92aa00a HD |
1321 | bool pri_ext = false; |
1322 | ||
1323 | if (pri_path->rec_type == SA_PATH_REC_TYPE_OPA) | |
1324 | pri_ext = opa_is_extended_lid(pri_path->opa.dlid, | |
1325 | pri_path->opa.slid); | |
3971c9f6 | 1326 | |
a20652e1 LR |
1327 | cm_format_mad_ece_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
1328 | cm_form_tid(cm_id_priv), param->ece.attr_mod); | |
a977049d | 1329 | |
91b60a71 JG |
1330 | IBA_SET(CM_REQ_LOCAL_COMM_ID, req_msg, |
1331 | be32_to_cpu(cm_id_priv->id.local_id)); | |
1332 | IBA_SET(CM_REQ_SERVICE_ID, req_msg, be64_to_cpu(param->service_id)); | |
1333 | IBA_SET(CM_REQ_LOCAL_CA_GUID, req_msg, | |
1334 | be64_to_cpu(cm_id_priv->id.device->node_guid)); | |
01adb7f4 | 1335 | IBA_SET(CM_REQ_LOCAL_QPN, req_msg, param->qp_num); |
b6bbee68 JG |
1336 | IBA_SET(CM_REQ_INITIATOR_DEPTH, req_msg, param->initiator_depth); |
1337 | IBA_SET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg, | |
1338 | param->remote_cm_response_timeout); | |
a977049d | 1339 | cm_req_set_qp_type(req_msg, param->qp_type); |
b6bbee68 | 1340 | IBA_SET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg, param->flow_control); |
01adb7f4 | 1341 | IBA_SET(CM_REQ_STARTING_PSN, req_msg, param->starting_psn); |
b6bbee68 JG |
1342 | IBA_SET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg, |
1343 | param->local_cm_response_timeout); | |
91b60a71 JG |
1344 | IBA_SET(CM_REQ_PARTITION_KEY, req_msg, |
1345 | be16_to_cpu(param->primary_path->pkey)); | |
b6bbee68 JG |
1346 | IBA_SET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg, |
1347 | param->primary_path->mtu); | |
1348 | IBA_SET(CM_REQ_MAX_CM_RETRIES, req_msg, param->max_cm_retries); | |
d26a360b SH |
1349 | |
1350 | if (param->qp_type != IB_QPT_XRC_INI) { | |
b6bbee68 JG |
1351 | IBA_SET(CM_REQ_RESPONDER_RESOURCES, req_msg, |
1352 | param->responder_resources); | |
1353 | IBA_SET(CM_REQ_RETRY_COUNT, req_msg, param->retry_count); | |
1354 | IBA_SET(CM_REQ_RNR_RETRY_COUNT, req_msg, | |
1355 | param->rnr_retry_count); | |
1356 | IBA_SET(CM_REQ_SRQ, req_msg, param->srq); | |
d26a360b | 1357 | } |
a977049d | 1358 | |
4ca662a3 JG |
1359 | *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg) = |
1360 | pri_path->sgid; | |
1361 | *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg) = | |
1362 | pri_path->dgid; | |
e92aa00a | 1363 | if (pri_ext) { |
4ca662a3 JG |
1364 | IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg) |
1365 | ->global.interface_id = | |
1366 | OPA_MAKE_ID(be32_to_cpu(pri_path->opa.slid)); | |
1367 | IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg) | |
1368 | ->global.interface_id = | |
1369 | OPA_MAKE_ID(be32_to_cpu(pri_path->opa.dlid)); | |
e92aa00a | 1370 | } |
3971c9f6 | 1371 | if (pri_path->hop_limit <= 1) { |
91b60a71 JG |
1372 | IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg, |
1373 | be16_to_cpu(pri_ext ? 0 : | |
1374 | htons(ntohl(sa_path_get_slid( | |
1375 | pri_path))))); | |
1376 | IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg, | |
1377 | be16_to_cpu(pri_ext ? 0 : | |
1378 | htons(ntohl(sa_path_get_dlid( | |
1379 | pri_path))))); | |
3971c9f6 SH |
1380 | } else { |
1381 | /* Work-around until there's a way to obtain remote LID info */ | |
91b60a71 JG |
1382 | IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg, |
1383 | be16_to_cpu(IB_LID_PERMISSIVE)); | |
1384 | IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg, | |
1385 | be16_to_cpu(IB_LID_PERMISSIVE)); | |
3971c9f6 | 1386 | } |
01adb7f4 JG |
1387 | IBA_SET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg, |
1388 | be32_to_cpu(pri_path->flow_label)); | |
b6bbee68 | 1389 | IBA_SET(CM_REQ_PRIMARY_PACKET_RATE, req_msg, pri_path->rate); |
91b60a71 JG |
1390 | IBA_SET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg, pri_path->traffic_class); |
1391 | IBA_SET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg, pri_path->hop_limit); | |
b6bbee68 JG |
1392 | IBA_SET(CM_REQ_PRIMARY_SL, req_msg, pri_path->sl); |
1393 | IBA_SET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg, | |
1394 | (pri_path->hop_limit <= 1)); | |
1395 | IBA_SET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg, | |
1d846126 | 1396 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1397 | pri_path->packet_life_time)); |
a977049d | 1398 | |
3971c9f6 | 1399 | if (alt_path) { |
e92aa00a HD |
1400 | bool alt_ext = false; |
1401 | ||
1402 | if (alt_path->rec_type == SA_PATH_REC_TYPE_OPA) | |
1403 | alt_ext = opa_is_extended_lid(alt_path->opa.dlid, | |
1404 | alt_path->opa.slid); | |
1405 | ||
4ca662a3 JG |
1406 | *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg) = |
1407 | alt_path->sgid; | |
1408 | *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg) = | |
1409 | alt_path->dgid; | |
e92aa00a | 1410 | if (alt_ext) { |
4ca662a3 JG |
1411 | IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, |
1412 | req_msg) | |
1413 | ->global.interface_id = | |
1414 | OPA_MAKE_ID(be32_to_cpu(alt_path->opa.slid)); | |
1415 | IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID, | |
1416 | req_msg) | |
1417 | ->global.interface_id = | |
1418 | OPA_MAKE_ID(be32_to_cpu(alt_path->opa.dlid)); | |
e92aa00a | 1419 | } |
3971c9f6 | 1420 | if (alt_path->hop_limit <= 1) { |
91b60a71 JG |
1421 | IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg, |
1422 | be16_to_cpu( | |
1423 | alt_ext ? 0 : | |
1424 | htons(ntohl(sa_path_get_slid( | |
1425 | alt_path))))); | |
1426 | IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg, | |
1427 | be16_to_cpu( | |
1428 | alt_ext ? 0 : | |
1429 | htons(ntohl(sa_path_get_dlid( | |
1430 | alt_path))))); | |
3971c9f6 | 1431 | } else { |
91b60a71 JG |
1432 | IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg, |
1433 | be16_to_cpu(IB_LID_PERMISSIVE)); | |
1434 | IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg, | |
1435 | be16_to_cpu(IB_LID_PERMISSIVE)); | |
3971c9f6 | 1436 | } |
01adb7f4 JG |
1437 | IBA_SET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg, |
1438 | be32_to_cpu(alt_path->flow_label)); | |
b6bbee68 | 1439 | IBA_SET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg, alt_path->rate); |
91b60a71 JG |
1440 | IBA_SET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg, |
1441 | alt_path->traffic_class); | |
1442 | IBA_SET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg, | |
1443 | alt_path->hop_limit); | |
b6bbee68 JG |
1444 | IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, alt_path->sl); |
1445 | IBA_SET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg, | |
1446 | (alt_path->hop_limit <= 1)); | |
1447 | IBA_SET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg, | |
1d846126 | 1448 | cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
3971c9f6 | 1449 | alt_path->packet_life_time)); |
a977049d | 1450 | } |
a20652e1 | 1451 | IBA_SET(CM_REQ_VENDOR_ID, req_msg, param->ece.vendor_id); |
a977049d HR |
1452 | |
1453 | if (param->private_data && param->private_data_len) | |
4ca662a3 JG |
1454 | IBA_SET_MEM(CM_REQ_PRIVATE_DATA, req_msg, param->private_data, |
1455 | param->private_data_len); | |
a977049d HR |
1456 | } |
1457 | ||
858119e1 | 1458 | static int cm_validate_req_param(struct ib_cm_req_param *param) |
a977049d | 1459 | { |
a977049d HR |
1460 | if (!param->primary_path) |
1461 | return -EINVAL; | |
1462 | ||
d26a360b SH |
1463 | if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC && |
1464 | param->qp_type != IB_QPT_XRC_INI) | |
a977049d HR |
1465 | return -EINVAL; |
1466 | ||
1467 | if (param->private_data && | |
1468 | param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) | |
1469 | return -EINVAL; | |
1470 | ||
1471 | if (param->alternate_path && | |
1472 | (param->alternate_path->pkey != param->primary_path->pkey || | |
1473 | param->alternate_path->mtu != param->primary_path->mtu)) | |
1474 | return -EINVAL; | |
1475 | ||
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | int ib_send_cm_req(struct ib_cm_id *cm_id, | |
1480 | struct ib_cm_req_param *param) | |
1481 | { | |
7345201c | 1482 | struct cm_av av = {}, alt_av = {}; |
a977049d | 1483 | struct cm_id_private *cm_id_priv; |
4b4e586e | 1484 | struct ib_mad_send_buf *msg; |
a977049d HR |
1485 | struct cm_req_msg *req_msg; |
1486 | unsigned long flags; | |
1487 | int ret; | |
1488 | ||
1489 | ret = cm_validate_req_param(param); | |
1490 | if (ret) | |
1491 | return ret; | |
1492 | ||
1493 | /* Verify that we're not in timewait. */ | |
1494 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
1495 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
bede86a3 | 1496 | if (cm_id->state != IB_CM_IDLE || WARN_ON(cm_id_priv->timewait_info)) { |
a977049d | 1497 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
7345201c | 1498 | return -EINVAL; |
a977049d HR |
1499 | } |
1500 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1501 | ||
1502 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> | |
1503 | id.local_id); | |
75df23e2 SH |
1504 | if (IS_ERR(cm_id_priv->timewait_info)) { |
1505 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
340b940e | 1506 | cm_id_priv->timewait_info = NULL; |
7345201c | 1507 | return ret; |
75df23e2 | 1508 | } |
a977049d | 1509 | |
39839107 | 1510 | ret = cm_init_av_by_path(param->primary_path, |
7345201c | 1511 | param->ppath_sgid_attr, &av); |
a977049d | 1512 | if (ret) |
7345201c | 1513 | return ret; |
a977049d | 1514 | if (param->alternate_path) { |
39839107 | 1515 | ret = cm_init_av_by_path(param->alternate_path, NULL, |
7345201c MZ |
1516 | &alt_av); |
1517 | if (ret) { | |
1518 | cm_destroy_av(&av); | |
1519 | return ret; | |
1520 | } | |
a977049d HR |
1521 | } |
1522 | cm_id->service_id = param->service_id; | |
9c3da099 | 1523 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
1524 | cm_id_priv->timeout_ms = cm_convert_to_ms( |
1525 | param->primary_path->packet_life_time) * 2 + | |
1526 | cm_convert_to_ms( | |
1527 | param->remote_cm_response_timeout); | |
1528 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
1529 | cm_id_priv->initiator_depth = param->initiator_depth; | |
1530 | cm_id_priv->responder_resources = param->responder_resources; | |
1531 | cm_id_priv->retry_count = param->retry_count; | |
1532 | cm_id_priv->path_mtu = param->primary_path->mtu; | |
e1444b5a | 1533 | cm_id_priv->pkey = param->primary_path->pkey; |
ae7971a7 | 1534 | cm_id_priv->qp_type = param->qp_type; |
a977049d | 1535 | |
4b4e586e | 1536 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
7345201c MZ |
1537 | |
1538 | cm_move_av_from_path(&cm_id_priv->av, &av); | |
1539 | if (param->alternate_path) | |
1540 | cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av); | |
1541 | ||
4b4e586e JG |
1542 | msg = cm_alloc_priv_msg(cm_id_priv); |
1543 | if (IS_ERR(msg)) { | |
1544 | ret = PTR_ERR(msg); | |
1545 | goto out_unlock; | |
1546 | } | |
a977049d | 1547 | |
4b4e586e | 1548 | req_msg = (struct cm_req_msg *)msg->mad; |
a977049d HR |
1549 | cm_format_req(req_msg, cm_id_priv, param); |
1550 | cm_id_priv->tid = req_msg->hdr.tid; | |
4b4e586e JG |
1551 | msg->timeout_ms = cm_id_priv->timeout_ms; |
1552 | msg->context[1] = (void *)(unsigned long)IB_CM_REQ_SENT; | |
a977049d | 1553 | |
01adb7f4 JG |
1554 | cm_id_priv->local_qpn = cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg)); |
1555 | cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg)); | |
a977049d | 1556 | |
8dc105be | 1557 | trace_icm_send_req(&cm_id_priv->id); |
4b4e586e JG |
1558 | ret = ib_post_send_mad(msg, NULL); |
1559 | if (ret) | |
1560 | goto out_free; | |
a977049d HR |
1561 | BUG_ON(cm_id->state != IB_CM_IDLE); |
1562 | cm_id->state = IB_CM_REQ_SENT; | |
1563 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
1564 | return 0; | |
4b4e586e JG |
1565 | out_free: |
1566 | cm_free_priv_msg(msg); | |
1567 | out_unlock: | |
1568 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
96376a40 | 1569 | return ret; |
a977049d HR |
1570 | } |
1571 | EXPORT_SYMBOL(ib_send_cm_req); | |
1572 | ||
1573 | static int cm_issue_rej(struct cm_port *port, | |
1574 | struct ib_mad_recv_wc *mad_recv_wc, | |
1575 | enum ib_cm_rej_reason reason, | |
1576 | enum cm_msg_response msg_rejected, | |
1577 | void *ari, u8 ari_length) | |
1578 | { | |
1579 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1580 | struct cm_rej_msg *rej_msg, *rcv_msg; |
1581 | int ret; | |
1582 | ||
1583 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
1584 | if (ret) | |
1585 | return ret; | |
1586 | ||
1587 | /* We just need common CM header information. Cast to any message. */ | |
1588 | rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; | |
1589 | rej_msg = (struct cm_rej_msg *) msg->mad; | |
1590 | ||
1591 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); | |
91b60a71 JG |
1592 | IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg, |
1593 | IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg)); | |
1594 | IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, | |
1595 | IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg)); | |
b6bbee68 | 1596 | IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, msg_rejected); |
91b60a71 | 1597 | IBA_SET(CM_REJ_REASON, rej_msg, reason); |
a977049d HR |
1598 | |
1599 | if (ari && ari_length) { | |
b6bbee68 | 1600 | IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length); |
4ca662a3 | 1601 | IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length); |
a977049d HR |
1602 | } |
1603 | ||
8dc105be CL |
1604 | trace_icm_issue_rej( |
1605 | IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg), | |
1606 | IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg)); | |
34816ad9 | 1607 | ret = ib_post_send_mad(msg, NULL); |
a977049d | 1608 | if (ret) |
96376a40 | 1609 | cm_free_response_msg(msg); |
a977049d HR |
1610 | |
1611 | return ret; | |
1612 | } | |
1613 | ||
6b3c0e6e DC |
1614 | static bool cm_req_has_alt_path(struct cm_req_msg *req_msg) |
1615 | { | |
91b60a71 JG |
1616 | return ((cpu_to_be16( |
1617 | IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg))) || | |
4ca662a3 JG |
1618 | (ib_is_opa_gid(IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, |
1619 | req_msg)))); | |
6b3c0e6e DC |
1620 | } |
1621 | ||
1fb7f897 | 1622 | static void cm_path_set_rec_type(struct ib_device *ib_device, u32 port_num, |
6b3c0e6e DC |
1623 | struct sa_path_rec *path, union ib_gid *gid) |
1624 | { | |
1625 | if (ib_is_opa_gid(gid) && rdma_cap_opa_ah(ib_device, port_num)) | |
1626 | path->rec_type = SA_PATH_REC_TYPE_OPA; | |
1627 | else | |
1628 | path->rec_type = SA_PATH_REC_TYPE_IB; | |
1629 | } | |
1630 | ||
ac3a949f DC |
1631 | static void cm_format_path_lid_from_req(struct cm_req_msg *req_msg, |
1632 | struct sa_path_rec *primary_path, | |
1633 | struct sa_path_rec *alt_path) | |
1634 | { | |
1635 | u32 lid; | |
1636 | ||
1637 | if (primary_path->rec_type != SA_PATH_REC_TYPE_OPA) { | |
1638 | sa_path_set_dlid(primary_path, | |
91b60a71 JG |
1639 | IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID, |
1640 | req_msg)); | |
ac3a949f | 1641 | sa_path_set_slid(primary_path, |
91b60a71 JG |
1642 | IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID, |
1643 | req_msg)); | |
ac3a949f | 1644 | } else { |
4ca662a3 JG |
1645 | lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
1646 | CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg)); | |
9d187177 | 1647 | sa_path_set_dlid(primary_path, lid); |
ac3a949f | 1648 | |
4ca662a3 JG |
1649 | lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
1650 | CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg)); | |
9d187177 | 1651 | sa_path_set_slid(primary_path, lid); |
ac3a949f DC |
1652 | } |
1653 | ||
1654 | if (!cm_req_has_alt_path(req_msg)) | |
1655 | return; | |
1656 | ||
1657 | if (alt_path->rec_type != SA_PATH_REC_TYPE_OPA) { | |
91b60a71 JG |
1658 | sa_path_set_dlid(alt_path, |
1659 | IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, | |
1660 | req_msg)); | |
1661 | sa_path_set_slid(alt_path, | |
1662 | IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, | |
1663 | req_msg)); | |
ac3a949f | 1664 | } else { |
4ca662a3 JG |
1665 | lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
1666 | CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg)); | |
9d187177 | 1667 | sa_path_set_dlid(alt_path, lid); |
ac3a949f | 1668 | |
4ca662a3 JG |
1669 | lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
1670 | CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg)); | |
9d187177 | 1671 | sa_path_set_slid(alt_path, lid); |
ac3a949f DC |
1672 | } |
1673 | } | |
1674 | ||
858119e1 | 1675 | static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
c2f8fc4e DC |
1676 | struct sa_path_rec *primary_path, |
1677 | struct sa_path_rec *alt_path) | |
a977049d | 1678 | { |
4ca662a3 JG |
1679 | primary_path->dgid = |
1680 | *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg); | |
1681 | primary_path->sgid = | |
1682 | *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg); | |
01adb7f4 JG |
1683 | primary_path->flow_label = |
1684 | cpu_to_be32(IBA_GET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg)); | |
91b60a71 JG |
1685 | primary_path->hop_limit = IBA_GET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg); |
1686 | primary_path->traffic_class = | |
1687 | IBA_GET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg); | |
a977049d | 1688 | primary_path->reversible = 1; |
91b60a71 JG |
1689 | primary_path->pkey = |
1690 | cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg)); | |
b6bbee68 | 1691 | primary_path->sl = IBA_GET(CM_REQ_PRIMARY_SL, req_msg); |
a977049d | 1692 | primary_path->mtu_selector = IB_SA_EQ; |
b6bbee68 | 1693 | primary_path->mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg); |
a977049d | 1694 | primary_path->rate_selector = IB_SA_EQ; |
b6bbee68 | 1695 | primary_path->rate = IBA_GET(CM_REQ_PRIMARY_PACKET_RATE, req_msg); |
a977049d HR |
1696 | primary_path->packet_life_time_selector = IB_SA_EQ; |
1697 | primary_path->packet_life_time = | |
b6bbee68 | 1698 | IBA_GET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg); |
a977049d | 1699 | primary_path->packet_life_time -= (primary_path->packet_life_time > 0); |
91b60a71 JG |
1700 | primary_path->service_id = |
1701 | cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)); | |
114cc9c4 PP |
1702 | if (sa_path_is_roce(primary_path)) |
1703 | primary_path->roce.route_resolved = false; | |
a977049d | 1704 | |
ac3a949f | 1705 | if (cm_req_has_alt_path(req_msg)) { |
4ca662a3 JG |
1706 | alt_path->dgid = *IBA_GET_MEM_PTR( |
1707 | CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg); | |
1708 | alt_path->sgid = *IBA_GET_MEM_PTR( | |
1709 | CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg); | |
01adb7f4 JG |
1710 | alt_path->flow_label = cpu_to_be32( |
1711 | IBA_GET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg)); | |
91b60a71 JG |
1712 | alt_path->hop_limit = |
1713 | IBA_GET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg); | |
1714 | alt_path->traffic_class = | |
1715 | IBA_GET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg); | |
a977049d | 1716 | alt_path->reversible = 1; |
91b60a71 JG |
1717 | alt_path->pkey = |
1718 | cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg)); | |
b6bbee68 | 1719 | alt_path->sl = IBA_GET(CM_REQ_ALTERNATE_SL, req_msg); |
a977049d | 1720 | alt_path->mtu_selector = IB_SA_EQ; |
b6bbee68 JG |
1721 | alt_path->mtu = |
1722 | IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg); | |
a977049d | 1723 | alt_path->rate_selector = IB_SA_EQ; |
b6bbee68 | 1724 | alt_path->rate = IBA_GET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg); |
a977049d HR |
1725 | alt_path->packet_life_time_selector = IB_SA_EQ; |
1726 | alt_path->packet_life_time = | |
b6bbee68 | 1727 | IBA_GET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg); |
a977049d | 1728 | alt_path->packet_life_time -= (alt_path->packet_life_time > 0); |
91b60a71 JG |
1729 | alt_path->service_id = |
1730 | cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)); | |
114cc9c4 PP |
1731 | |
1732 | if (sa_path_is_roce(alt_path)) | |
1733 | alt_path->roce.route_resolved = false; | |
a977049d | 1734 | } |
ac3a949f | 1735 | cm_format_path_lid_from_req(req_msg, primary_path, alt_path); |
a977049d HR |
1736 | } |
1737 | ||
24cad9a7 HE |
1738 | static u16 cm_get_bth_pkey(struct cm_work *work) |
1739 | { | |
1740 | struct ib_device *ib_dev = work->port->cm_dev->ib_device; | |
1fb7f897 | 1741 | u32 port_num = work->port->port_num; |
24cad9a7 HE |
1742 | u16 pkey_index = work->mad_recv_wc->wc->pkey_index; |
1743 | u16 pkey; | |
1744 | int ret; | |
1745 | ||
1746 | ret = ib_get_cached_pkey(ib_dev, port_num, pkey_index, &pkey); | |
1747 | if (ret) { | |
3cea7b4a | 1748 | dev_warn_ratelimited(&ib_dev->dev, "ib_cm: Couldn't retrieve pkey for incoming request (port %u, pkey index %u). %d\n", |
24cad9a7 HE |
1749 | port_num, pkey_index, ret); |
1750 | return 0; | |
1751 | } | |
1752 | ||
1753 | return pkey; | |
1754 | } | |
1755 | ||
c5c4e40e | 1756 | /** |
2988ca08 | 1757 | * cm_opa_to_ib_sgid - Convert OPA SGID to IB SGID |
c5c4e40e DH |
1758 | * ULPs (such as IPoIB) do not understand OPA GIDs and will |
1759 | * reject them as the local_gid will not match the sgid. Therefore, | |
1760 | * change the pathrec's SGID to an IB SGID. | |
1761 | * | |
1762 | * @work: Work completion | |
1763 | * @path: Path record | |
1764 | */ | |
1765 | static void cm_opa_to_ib_sgid(struct cm_work *work, | |
1766 | struct sa_path_rec *path) | |
1767 | { | |
1768 | struct ib_device *dev = work->port->cm_dev->ib_device; | |
1fb7f897 | 1769 | u32 port_num = work->port->port_num; |
c5c4e40e DH |
1770 | |
1771 | if (rdma_cap_opa_ah(dev, port_num) && | |
1772 | (ib_is_opa_gid(&path->sgid))) { | |
1773 | union ib_gid sgid; | |
1774 | ||
1dfce294 | 1775 | if (rdma_query_gid(dev, port_num, 0, &sgid)) { |
c5c4e40e DH |
1776 | dev_warn(&dev->dev, |
1777 | "Error updating sgid in CM request\n"); | |
1778 | return; | |
1779 | } | |
1780 | ||
1781 | path->sgid = sgid; | |
1782 | } | |
1783 | } | |
1784 | ||
a977049d HR |
1785 | static void cm_format_req_event(struct cm_work *work, |
1786 | struct cm_id_private *cm_id_priv, | |
1787 | struct ib_cm_id *listen_id) | |
1788 | { | |
1789 | struct cm_req_msg *req_msg; | |
1790 | struct ib_cm_req_event_param *param; | |
1791 | ||
1792 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1793 | param = &work->cm_event.param.req_rcvd; | |
1794 | param->listen_id = listen_id; | |
24cad9a7 | 1795 | param->bth_pkey = cm_get_bth_pkey(work); |
a977049d HR |
1796 | param->port = cm_id_priv->av.port->port_num; |
1797 | param->primary_path = &work->path[0]; | |
c5c4e40e DH |
1798 | cm_opa_to_ib_sgid(work, param->primary_path); |
1799 | if (cm_req_has_alt_path(req_msg)) { | |
a977049d | 1800 | param->alternate_path = &work->path[1]; |
c5c4e40e DH |
1801 | cm_opa_to_ib_sgid(work, param->alternate_path); |
1802 | } else { | |
a977049d | 1803 | param->alternate_path = NULL; |
c5c4e40e | 1804 | } |
91b60a71 JG |
1805 | param->remote_ca_guid = |
1806 | cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg)); | |
1807 | param->remote_qkey = IBA_GET(CM_REQ_LOCAL_Q_KEY, req_msg); | |
01adb7f4 | 1808 | param->remote_qpn = IBA_GET(CM_REQ_LOCAL_QPN, req_msg); |
a977049d | 1809 | param->qp_type = cm_req_get_qp_type(req_msg); |
01adb7f4 | 1810 | param->starting_psn = IBA_GET(CM_REQ_STARTING_PSN, req_msg); |
b6bbee68 JG |
1811 | param->responder_resources = IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg); |
1812 | param->initiator_depth = IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg); | |
a977049d | 1813 | param->local_cm_response_timeout = |
b6bbee68 JG |
1814 | IBA_GET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg); |
1815 | param->flow_control = IBA_GET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg); | |
a977049d | 1816 | param->remote_cm_response_timeout = |
b6bbee68 JG |
1817 | IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg); |
1818 | param->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg); | |
1819 | param->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg); | |
1820 | param->srq = IBA_GET(CM_REQ_SRQ, req_msg); | |
cee10433 | 1821 | param->ppath_sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr; |
a20652e1 LR |
1822 | param->ece.vendor_id = IBA_GET(CM_REQ_VENDOR_ID, req_msg); |
1823 | param->ece.attr_mod = be32_to_cpu(req_msg->hdr.attr_mod); | |
1824 | ||
4ca662a3 JG |
1825 | work->cm_event.private_data = |
1826 | IBA_GET_MEM_PTR(CM_REQ_PRIVATE_DATA, req_msg); | |
a977049d HR |
1827 | } |
1828 | ||
1829 | static void cm_process_work(struct cm_id_private *cm_id_priv, | |
1830 | struct cm_work *work) | |
1831 | { | |
a977049d HR |
1832 | int ret; |
1833 | ||
1834 | /* We will typically only have the current event to report. */ | |
1835 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
1836 | cm_free_work(work); | |
1837 | ||
1838 | while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { | |
24be6e81 | 1839 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 1840 | work = cm_dequeue_work(cm_id_priv); |
24be6e81 | 1841 | spin_unlock_irq(&cm_id_priv->lock); |
2f5059a7 LR |
1842 | if (!work) |
1843 | return; | |
1844 | ||
a977049d HR |
1845 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, |
1846 | &work->cm_event); | |
1847 | cm_free_work(work); | |
1848 | } | |
1849 | cm_deref_id(cm_id_priv); | |
1850 | if (ret) | |
04c33543 | 1851 | cm_destroy_id(&cm_id_priv->id, ret); |
a977049d HR |
1852 | } |
1853 | ||
1854 | static void cm_format_mra(struct cm_mra_msg *mra_msg, | |
1855 | struct cm_id_private *cm_id_priv, | |
1856 | enum cm_msg_response msg_mraed, u8 service_timeout, | |
1857 | const void *private_data, u8 private_data_len) | |
1858 | { | |
1859 | cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); | |
b6bbee68 | 1860 | IBA_SET(CM_MRA_MESSAGE_MRAED, mra_msg, msg_mraed); |
91b60a71 JG |
1861 | IBA_SET(CM_MRA_LOCAL_COMM_ID, mra_msg, |
1862 | be32_to_cpu(cm_id_priv->id.local_id)); | |
1863 | IBA_SET(CM_MRA_REMOTE_COMM_ID, mra_msg, | |
1864 | be32_to_cpu(cm_id_priv->id.remote_id)); | |
b6bbee68 | 1865 | IBA_SET(CM_MRA_SERVICE_TIMEOUT, mra_msg, service_timeout); |
a977049d HR |
1866 | |
1867 | if (private_data && private_data_len) | |
4ca662a3 JG |
1868 | IBA_SET_MEM(CM_MRA_PRIVATE_DATA, mra_msg, private_data, |
1869 | private_data_len); | |
a977049d HR |
1870 | } |
1871 | ||
1872 | static void cm_format_rej(struct cm_rej_msg *rej_msg, | |
1873 | struct cm_id_private *cm_id_priv, | |
0c6949c3 LR |
1874 | enum ib_cm_rej_reason reason, void *ari, |
1875 | u8 ari_length, const void *private_data, | |
1876 | u8 private_data_len, enum ib_cm_state state) | |
a977049d | 1877 | { |
00777a68 JG |
1878 | lockdep_assert_held(&cm_id_priv->lock); |
1879 | ||
a977049d | 1880 | cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); |
91b60a71 JG |
1881 | IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg, |
1882 | be32_to_cpu(cm_id_priv->id.remote_id)); | |
a977049d | 1883 | |
0c6949c3 | 1884 | switch (state) { |
a977049d | 1885 | case IB_CM_REQ_RCVD: |
91b60a71 | 1886 | IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(0)); |
b6bbee68 | 1887 | IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ); |
a977049d HR |
1888 | break; |
1889 | case IB_CM_MRA_REQ_SENT: | |
91b60a71 JG |
1890 | IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, |
1891 | be32_to_cpu(cm_id_priv->id.local_id)); | |
b6bbee68 | 1892 | IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ); |
a977049d HR |
1893 | break; |
1894 | case IB_CM_REP_RCVD: | |
1895 | case IB_CM_MRA_REP_SENT: | |
91b60a71 JG |
1896 | IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, |
1897 | be32_to_cpu(cm_id_priv->id.local_id)); | |
b6bbee68 | 1898 | IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REP); |
a977049d HR |
1899 | break; |
1900 | default: | |
91b60a71 JG |
1901 | IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, |
1902 | be32_to_cpu(cm_id_priv->id.local_id)); | |
b6bbee68 JG |
1903 | IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, |
1904 | CM_MSG_RESPONSE_OTHER); | |
a977049d HR |
1905 | break; |
1906 | } | |
1907 | ||
91b60a71 | 1908 | IBA_SET(CM_REJ_REASON, rej_msg, reason); |
a977049d | 1909 | if (ari && ari_length) { |
b6bbee68 | 1910 | IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length); |
4ca662a3 | 1911 | IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length); |
a977049d HR |
1912 | } |
1913 | ||
1914 | if (private_data && private_data_len) | |
4ca662a3 JG |
1915 | IBA_SET_MEM(CM_REJ_PRIVATE_DATA, rej_msg, private_data, |
1916 | private_data_len); | |
a977049d HR |
1917 | } |
1918 | ||
1919 | static void cm_dup_req_handler(struct cm_work *work, | |
1920 | struct cm_id_private *cm_id_priv) | |
1921 | { | |
1922 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
1923 | int ret; |
1924 | ||
526a12c8 JG |
1925 | atomic_long_inc( |
1926 | &work->port->counters[CM_RECV_DUPLICATES][CM_REQ_COUNTER]); | |
9af57b7a | 1927 | |
a977049d | 1928 | /* Quick state check to discard duplicate REQs. */ |
d1de9a88 JG |
1929 | spin_lock_irq(&cm_id_priv->lock); |
1930 | if (cm_id_priv->id.state == IB_CM_REQ_RCVD) { | |
1931 | spin_unlock_irq(&cm_id_priv->lock); | |
a977049d | 1932 | return; |
d1de9a88 JG |
1933 | } |
1934 | spin_unlock_irq(&cm_id_priv->lock); | |
a977049d HR |
1935 | |
1936 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); | |
1937 | if (ret) | |
1938 | return; | |
1939 | ||
24be6e81 | 1940 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
1941 | switch (cm_id_priv->id.state) { |
1942 | case IB_CM_MRA_REQ_SENT: | |
1943 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
1944 | CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, | |
1945 | cm_id_priv->private_data, | |
1946 | cm_id_priv->private_data_len); | |
1947 | break; | |
1948 | case IB_CM_TIMEWAIT: | |
0c6949c3 LR |
1949 | cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, |
1950 | IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0, | |
1951 | IB_CM_TIMEWAIT); | |
a977049d HR |
1952 | break; |
1953 | default: | |
1954 | goto unlock; | |
1955 | } | |
24be6e81 | 1956 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 1957 | |
8dc105be | 1958 | trace_icm_send_dup_req(&cm_id_priv->id); |
34816ad9 | 1959 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
1960 | if (ret) |
1961 | goto free; | |
1962 | return; | |
1963 | ||
24be6e81 | 1964 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
96376a40 | 1965 | free: cm_free_response_msg(msg); |
a977049d HR |
1966 | } |
1967 | ||
f681967a WL |
1968 | static struct cm_id_private *cm_match_req(struct cm_work *work, |
1969 | struct cm_id_private *cm_id_priv) | |
a977049d HR |
1970 | { |
1971 | struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; | |
1972 | struct cm_timewait_info *timewait_info; | |
1973 | struct cm_req_msg *req_msg; | |
a977049d HR |
1974 | |
1975 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
1976 | ||
d998ccce | 1977 | /* Check for possible duplicate REQ. */ |
24be6e81 | 1978 | spin_lock_irq(&cm.lock); |
a977049d | 1979 | timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
a977049d | 1980 | if (timewait_info) { |
4d6e8a03 | 1981 | cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id, |
a977049d | 1982 | timewait_info->work.remote_id); |
24be6e81 | 1983 | spin_unlock_irq(&cm.lock); |
a977049d HR |
1984 | if (cur_cm_id_priv) { |
1985 | cm_dup_req_handler(work, cur_cm_id_priv); | |
1986 | cm_deref_id(cur_cm_id_priv); | |
d998ccce SH |
1987 | } |
1988 | return NULL; | |
1989 | } | |
1990 | ||
1991 | /* Check for stale connections. */ | |
1992 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); | |
1993 | if (timewait_info) { | |
9767a27e | 1994 | cm_remove_remote(cm_id_priv); |
4d6e8a03 | 1995 | cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id, |
9315bc9a HWR |
1996 | timewait_info->work.remote_id); |
1997 | ||
24be6e81 | 1998 | spin_unlock_irq(&cm.lock); |
d998ccce SH |
1999 | cm_issue_rej(work->port, work->mad_recv_wc, |
2000 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, | |
2001 | NULL, 0); | |
9315bc9a | 2002 | if (cur_cm_id_priv) { |
51e8463c | 2003 | ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0); |
9315bc9a HWR |
2004 | cm_deref_id(cur_cm_id_priv); |
2005 | } | |
d998ccce | 2006 | return NULL; |
a977049d HR |
2007 | } |
2008 | ||
2009 | /* Find matching listen request. */ | |
91b60a71 JG |
2010 | listen_cm_id_priv = cm_find_listen( |
2011 | cm_id_priv->id.device, | |
2012 | cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg))); | |
a977049d | 2013 | if (!listen_cm_id_priv) { |
9767a27e | 2014 | cm_remove_remote(cm_id_priv); |
24be6e81 | 2015 | spin_unlock_irq(&cm.lock); |
a977049d HR |
2016 | cm_issue_rej(work->port, work->mad_recv_wc, |
2017 | IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, | |
2018 | NULL, 0); | |
c206f8ba | 2019 | return NULL; |
a977049d | 2020 | } |
24be6e81 | 2021 | spin_unlock_irq(&cm.lock); |
a977049d | 2022 | return listen_cm_id_priv; |
a977049d HR |
2023 | } |
2024 | ||
3971c9f6 SH |
2025 | /* |
2026 | * Work-around for inter-subnet connections. If the LIDs are permissive, | |
2027 | * we need to override the LID/SL data in the REQ with the LID information | |
2028 | * in the work completion. | |
2029 | */ | |
2030 | static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) | |
2031 | { | |
b6bbee68 | 2032 | if (!IBA_GET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg)) { |
91b60a71 JG |
2033 | if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID, |
2034 | req_msg)) == IB_LID_PERMISSIVE) { | |
2035 | IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg, | |
2036 | be16_to_cpu(ib_lid_be16(wc->slid))); | |
b6bbee68 | 2037 | IBA_SET(CM_REQ_PRIMARY_SL, req_msg, wc->sl); |
3971c9f6 SH |
2038 | } |
2039 | ||
91b60a71 JG |
2040 | if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID, |
2041 | req_msg)) == IB_LID_PERMISSIVE) | |
2042 | IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg, | |
2043 | wc->dlid_path_bits); | |
3971c9f6 SH |
2044 | } |
2045 | ||
b6bbee68 | 2046 | if (!IBA_GET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg)) { |
91b60a71 JG |
2047 | if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, |
2048 | req_msg)) == IB_LID_PERMISSIVE) { | |
2049 | IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg, | |
2050 | be16_to_cpu(ib_lid_be16(wc->slid))); | |
b6bbee68 | 2051 | IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, wc->sl); |
3971c9f6 SH |
2052 | } |
2053 | ||
91b60a71 JG |
2054 | if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, |
2055 | req_msg)) == IB_LID_PERMISSIVE) | |
2056 | IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg, | |
2057 | wc->dlid_path_bits); | |
3971c9f6 SH |
2058 | } |
2059 | } | |
2060 | ||
a977049d HR |
2061 | static int cm_req_handler(struct cm_work *work) |
2062 | { | |
a977049d HR |
2063 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; |
2064 | struct cm_req_msg *req_msg; | |
d8966fcd | 2065 | const struct ib_global_route *grh; |
a8872d53 | 2066 | const struct ib_gid_attr *gid_attr; |
a977049d HR |
2067 | int ret; |
2068 | ||
2069 | req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; | |
2070 | ||
c206f8ba JG |
2071 | cm_id_priv = |
2072 | cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL); | |
2073 | if (IS_ERR(cm_id_priv)) | |
2074 | return PTR_ERR(cm_id_priv); | |
a977049d | 2075 | |
91b60a71 JG |
2076 | cm_id_priv->id.remote_id = |
2077 | cpu_to_be32(IBA_GET(CM_REQ_LOCAL_COMM_ID, req_msg)); | |
c206f8ba JG |
2078 | cm_id_priv->id.service_id = |
2079 | cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)); | |
2080 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); | |
2081 | cm_id_priv->tid = req_msg->hdr.tid; | |
2082 | cm_id_priv->timeout_ms = cm_convert_to_ms( | |
2083 | IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg)); | |
2084 | cm_id_priv->max_cm_retries = IBA_GET(CM_REQ_MAX_CM_RETRIES, req_msg); | |
2085 | cm_id_priv->remote_qpn = | |
2086 | cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg)); | |
2087 | cm_id_priv->initiator_depth = | |
2088 | IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg); | |
2089 | cm_id_priv->responder_resources = | |
2090 | IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg); | |
2091 | cm_id_priv->path_mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg); | |
2092 | cm_id_priv->pkey = cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg)); | |
2093 | cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg)); | |
2094 | cm_id_priv->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg); | |
2095 | cm_id_priv->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg); | |
2096 | cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); | |
2097 | ||
0c4386ec PP |
2098 | ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
2099 | work->mad_recv_wc->recv_buf.grh, | |
2100 | &cm_id_priv->av); | |
2101 | if (ret) | |
2102 | goto destroy; | |
a977049d HR |
2103 | cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> |
2104 | id.local_id); | |
2105 | if (IS_ERR(cm_id_priv->timewait_info)) { | |
2106 | ret = PTR_ERR(cm_id_priv->timewait_info); | |
340b940e | 2107 | cm_id_priv->timewait_info = NULL; |
76842405 | 2108 | goto destroy; |
a977049d | 2109 | } |
c206f8ba | 2110 | cm_id_priv->timewait_info->work.remote_id = cm_id_priv->id.remote_id; |
91b60a71 JG |
2111 | cm_id_priv->timewait_info->remote_ca_guid = |
2112 | cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg)); | |
c206f8ba JG |
2113 | cm_id_priv->timewait_info->remote_qpn = cm_id_priv->remote_qpn; |
2114 | ||
2115 | /* | |
2116 | * Note that the ID pointer is not in the xarray at this point, | |
2117 | * so this set is only visible to the local thread. | |
2118 | */ | |
2119 | cm_id_priv->id.state = IB_CM_REQ_RCVD; | |
a977049d HR |
2120 | |
2121 | listen_cm_id_priv = cm_match_req(work, cm_id_priv); | |
2122 | if (!listen_cm_id_priv) { | |
75874b3d | 2123 | trace_icm_no_listener_err(&cm_id_priv->id); |
c206f8ba | 2124 | cm_id_priv->id.state = IB_CM_IDLE; |
a977049d | 2125 | ret = -EINVAL; |
bede86a3 | 2126 | goto destroy; |
a977049d HR |
2127 | } |
2128 | ||
9fdca4da | 2129 | memset(&work->path[0], 0, sizeof(work->path[0])); |
5a3dc323 PP |
2130 | if (cm_req_has_alt_path(req_msg)) |
2131 | memset(&work->path[1], 0, sizeof(work->path[1])); | |
d8966fcd | 2132 | grh = rdma_ah_read_grh(&cm_id_priv->av.ah_attr); |
a8872d53 | 2133 | gid_attr = grh->sgid_attr; |
16c72e40 | 2134 | |
65d4801a | 2135 | if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE) { |
16c72e40 | 2136 | work->path[0].rec_type = |
a8872d53 | 2137 | sa_conv_gid_to_pathrec_type(gid_attr->gid_type); |
16c72e40 | 2138 | } else { |
65d4801a | 2139 | cm_process_routed_req(req_msg, work->mad_recv_wc->wc); |
4ca662a3 JG |
2140 | cm_path_set_rec_type( |
2141 | work->port->cm_dev->ib_device, work->port->port_num, | |
2142 | &work->path[0], | |
2143 | IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, | |
2144 | req_msg)); | |
16c72e40 PP |
2145 | } |
2146 | if (cm_req_has_alt_path(req_msg)) | |
2147 | work->path[1].rec_type = work->path[0].rec_type; | |
2148 | cm_format_paths_from_req(req_msg, &work->path[0], | |
2149 | &work->path[1]); | |
2150 | if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE) | |
2151 | sa_path_set_dmac(&work->path[0], | |
2152 | cm_id_priv->av.ah_attr.roce.dmac); | |
2153 | work->path[0].hop_limit = grh->hop_limit; | |
76039ac9 MZ |
2154 | |
2155 | /* This destroy call is needed to pair with cm_init_av_for_response */ | |
2156 | cm_destroy_av(&cm_id_priv->av); | |
3595c398 | 2157 | ret = cm_init_av_by_path(&work->path[0], gid_attr, &cm_id_priv->av); |
76842405 | 2158 | if (ret) { |
16c72e40 PP |
2159 | int err; |
2160 | ||
1dfce294 PP |
2161 | err = rdma_query_gid(work->port->cm_dev->ib_device, |
2162 | work->port->port_num, 0, | |
2163 | &work->path[0].sgid); | |
16c72e40 | 2164 | if (err) |
c206f8ba | 2165 | ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID, |
16c72e40 PP |
2166 | NULL, 0, NULL, 0); |
2167 | else | |
c206f8ba | 2168 | ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID, |
16c72e40 PP |
2169 | &work->path[0].sgid, |
2170 | sizeof(work->path[0].sgid), | |
2171 | NULL, 0); | |
76842405 SH |
2172 | goto rejected; |
2173 | } | |
6b3c0e6e | 2174 | if (cm_req_has_alt_path(req_msg)) { |
39839107 | 2175 | ret = cm_init_av_by_path(&work->path[1], NULL, |
3595c398 | 2176 | &cm_id_priv->alt_av); |
76842405 | 2177 | if (ret) { |
c206f8ba JG |
2178 | ib_send_cm_rej(&cm_id_priv->id, |
2179 | IB_CM_REJ_INVALID_ALT_GID, | |
76842405 | 2180 | &work->path[0].sgid, |
16c72e40 | 2181 | sizeof(work->path[0].sgid), NULL, 0); |
76842405 SH |
2182 | goto rejected; |
2183 | } | |
a977049d | 2184 | } |
a977049d | 2185 | |
c206f8ba JG |
2186 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; |
2187 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
a977049d | 2188 | cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); |
c206f8ba JG |
2189 | |
2190 | /* Now MAD handlers can see the new ID */ | |
2191 | spin_lock_irq(&cm_id_priv->lock); | |
2192 | cm_finalize_id(cm_id_priv); | |
2193 | ||
2194 | /* Refcount belongs to the event, pairs with cm_process_work() */ | |
2195 | refcount_inc(&cm_id_priv->refcount); | |
e83f195a | 2196 | cm_queue_work_unlock(cm_id_priv, work); |
c206f8ba JG |
2197 | /* |
2198 | * Since this ID was just created and was not made visible to other MAD | |
2199 | * handlers until the cm_finalize_id() above we know that the | |
2200 | * cm_process_work() will deliver the event and the listen_cm_id | |
2201 | * embedded in the event can be derefed here. | |
2202 | */ | |
a977049d HR |
2203 | cm_deref_id(listen_cm_id_priv); |
2204 | return 0; | |
2205 | ||
76842405 | 2206 | rejected: |
a977049d | 2207 | cm_deref_id(listen_cm_id_priv); |
76842405 | 2208 | destroy: |
c206f8ba | 2209 | ib_destroy_cm_id(&cm_id_priv->id); |
a977049d HR |
2210 | return ret; |
2211 | } | |
2212 | ||
2213 | static void cm_format_rep(struct cm_rep_msg *rep_msg, | |
2214 | struct cm_id_private *cm_id_priv, | |
2215 | struct ib_cm_rep_param *param) | |
2216 | { | |
a20652e1 LR |
2217 | cm_format_mad_ece_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid, |
2218 | param->ece.attr_mod); | |
91b60a71 JG |
2219 | IBA_SET(CM_REP_LOCAL_COMM_ID, rep_msg, |
2220 | be32_to_cpu(cm_id_priv->id.local_id)); | |
2221 | IBA_SET(CM_REP_REMOTE_COMM_ID, rep_msg, | |
2222 | be32_to_cpu(cm_id_priv->id.remote_id)); | |
01adb7f4 | 2223 | IBA_SET(CM_REP_STARTING_PSN, rep_msg, param->starting_psn); |
91b60a71 JG |
2224 | IBA_SET(CM_REP_RESPONDER_RESOURCES, rep_msg, |
2225 | param->responder_resources); | |
b6bbee68 JG |
2226 | IBA_SET(CM_REP_TARGET_ACK_DELAY, rep_msg, |
2227 | cm_id_priv->av.port->cm_dev->ack_delay); | |
2228 | IBA_SET(CM_REP_FAILOVER_ACCEPTED, rep_msg, param->failover_accepted); | |
2229 | IBA_SET(CM_REP_RNR_RETRY_COUNT, rep_msg, param->rnr_retry_count); | |
91b60a71 JG |
2230 | IBA_SET(CM_REP_LOCAL_CA_GUID, rep_msg, |
2231 | be64_to_cpu(cm_id_priv->id.device->node_guid)); | |
a977049d | 2232 | |
d26a360b | 2233 | if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) { |
91b60a71 JG |
2234 | IBA_SET(CM_REP_INITIATOR_DEPTH, rep_msg, |
2235 | param->initiator_depth); | |
b6bbee68 JG |
2236 | IBA_SET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg, |
2237 | param->flow_control); | |
2238 | IBA_SET(CM_REP_SRQ, rep_msg, param->srq); | |
01adb7f4 | 2239 | IBA_SET(CM_REP_LOCAL_QPN, rep_msg, param->qp_num); |
d26a360b | 2240 | } else { |
b6bbee68 | 2241 | IBA_SET(CM_REP_SRQ, rep_msg, 1); |
01adb7f4 | 2242 | IBA_SET(CM_REP_LOCAL_EE_CONTEXT_NUMBER, rep_msg, param->qp_num); |
d26a360b SH |
2243 | } |
2244 | ||
a20652e1 LR |
2245 | IBA_SET(CM_REP_VENDOR_ID_L, rep_msg, param->ece.vendor_id); |
2246 | IBA_SET(CM_REP_VENDOR_ID_M, rep_msg, param->ece.vendor_id >> 8); | |
2247 | IBA_SET(CM_REP_VENDOR_ID_H, rep_msg, param->ece.vendor_id >> 16); | |
2248 | ||
a977049d | 2249 | if (param->private_data && param->private_data_len) |
4ca662a3 JG |
2250 | IBA_SET_MEM(CM_REP_PRIVATE_DATA, rep_msg, param->private_data, |
2251 | param->private_data_len); | |
a977049d HR |
2252 | } |
2253 | ||
2254 | int ib_send_cm_rep(struct ib_cm_id *cm_id, | |
2255 | struct ib_cm_rep_param *param) | |
2256 | { | |
2257 | struct cm_id_private *cm_id_priv; | |
2258 | struct ib_mad_send_buf *msg; | |
2259 | struct cm_rep_msg *rep_msg; | |
a977049d HR |
2260 | unsigned long flags; |
2261 | int ret; | |
2262 | ||
2263 | if (param->private_data && | |
2264 | param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) | |
2265 | return -EINVAL; | |
2266 | ||
2267 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2268 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2269 | if (cm_id->state != IB_CM_REQ_RCVD && | |
2270 | cm_id->state != IB_CM_MRA_REQ_SENT) { | |
75874b3d | 2271 | trace_icm_send_rep_err(cm_id_priv->id.local_id, cm_id->state); |
a977049d HR |
2272 | ret = -EINVAL; |
2273 | goto out; | |
2274 | } | |
2275 | ||
4b4e586e JG |
2276 | msg = cm_alloc_priv_msg(cm_id_priv); |
2277 | if (IS_ERR(msg)) { | |
2278 | ret = PTR_ERR(msg); | |
a977049d | 2279 | goto out; |
4b4e586e | 2280 | } |
a977049d HR |
2281 | |
2282 | rep_msg = (struct cm_rep_msg *) msg->mad; | |
2283 | cm_format_rep(rep_msg, cm_id_priv, param); | |
34816ad9 | 2284 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2285 | msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
2286 | ||
8dc105be | 2287 | trace_icm_send_rep(cm_id); |
34816ad9 | 2288 | ret = ib_post_send_mad(msg, NULL); |
4b4e586e JG |
2289 | if (ret) |
2290 | goto out_free; | |
a977049d HR |
2291 | |
2292 | cm_id->state = IB_CM_REP_SENT; | |
a977049d HR |
2293 | cm_id_priv->initiator_depth = param->initiator_depth; |
2294 | cm_id_priv->responder_resources = param->responder_resources; | |
01adb7f4 | 2295 | cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg)); |
ca750d4a LR |
2296 | WARN_ONCE(param->qp_num & 0xFF000000, |
2297 | "IBTA declares QPN to be 24 bits, but it is 0x%X\n", | |
2298 | param->qp_num); | |
ef700446 | 2299 | cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF); |
4b4e586e JG |
2300 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
2301 | return 0; | |
a977049d | 2302 | |
4b4e586e JG |
2303 | out_free: |
2304 | cm_free_priv_msg(msg); | |
2305 | out: | |
2306 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
2307 | return ret; |
2308 | } | |
2309 | EXPORT_SYMBOL(ib_send_cm_rep); | |
2310 | ||
2311 | static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, | |
2312 | struct cm_id_private *cm_id_priv, | |
2313 | const void *private_data, | |
2314 | u8 private_data_len) | |
2315 | { | |
2316 | cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); | |
91b60a71 JG |
2317 | IBA_SET(CM_RTU_LOCAL_COMM_ID, rtu_msg, |
2318 | be32_to_cpu(cm_id_priv->id.local_id)); | |
2319 | IBA_SET(CM_RTU_REMOTE_COMM_ID, rtu_msg, | |
2320 | be32_to_cpu(cm_id_priv->id.remote_id)); | |
a977049d HR |
2321 | |
2322 | if (private_data && private_data_len) | |
4ca662a3 JG |
2323 | IBA_SET_MEM(CM_RTU_PRIVATE_DATA, rtu_msg, private_data, |
2324 | private_data_len); | |
a977049d HR |
2325 | } |
2326 | ||
2327 | int ib_send_cm_rtu(struct ib_cm_id *cm_id, | |
2328 | const void *private_data, | |
2329 | u8 private_data_len) | |
2330 | { | |
2331 | struct cm_id_private *cm_id_priv; | |
2332 | struct ib_mad_send_buf *msg; | |
a977049d HR |
2333 | unsigned long flags; |
2334 | void *data; | |
2335 | int ret; | |
2336 | ||
2337 | if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) | |
2338 | return -EINVAL; | |
2339 | ||
2340 | data = cm_copy_private_data(private_data, private_data_len); | |
2341 | if (IS_ERR(data)) | |
2342 | return PTR_ERR(data); | |
2343 | ||
2344 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
2345 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2346 | if (cm_id->state != IB_CM_REP_RCVD && | |
2347 | cm_id->state != IB_CM_MRA_REP_SENT) { | |
75874b3d | 2348 | trace_icm_send_cm_rtu_err(cm_id); |
a977049d HR |
2349 | ret = -EINVAL; |
2350 | goto error; | |
2351 | } | |
2352 | ||
4b4e586e JG |
2353 | msg = cm_alloc_msg(cm_id_priv); |
2354 | if (IS_ERR(msg)) { | |
2355 | ret = PTR_ERR(msg); | |
a977049d | 2356 | goto error; |
4b4e586e | 2357 | } |
a977049d HR |
2358 | |
2359 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
2360 | private_data, private_data_len); | |
2361 | ||
8dc105be | 2362 | trace_icm_send_rtu(cm_id); |
34816ad9 | 2363 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2364 | if (ret) { |
2365 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2366 | cm_free_msg(msg); | |
2367 | kfree(data); | |
2368 | return ret; | |
2369 | } | |
2370 | ||
2371 | cm_id->state = IB_CM_ESTABLISHED; | |
2372 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
2373 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2374 | return 0; | |
2375 | ||
2376 | error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
2377 | kfree(data); | |
2378 | return ret; | |
2379 | } | |
2380 | EXPORT_SYMBOL(ib_send_cm_rtu); | |
2381 | ||
ef700446 | 2382 | static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type) |
a977049d HR |
2383 | { |
2384 | struct cm_rep_msg *rep_msg; | |
2385 | struct ib_cm_rep_event_param *param; | |
2386 | ||
2387 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
2388 | param = &work->cm_event.param.rep_rcvd; | |
91b60a71 JG |
2389 | param->remote_ca_guid = |
2390 | cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg)); | |
2391 | param->remote_qkey = IBA_GET(CM_REP_LOCAL_Q_KEY, rep_msg); | |
ef700446 | 2392 | param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type)); |
01adb7f4 | 2393 | param->starting_psn = IBA_GET(CM_REP_STARTING_PSN, rep_msg); |
91b60a71 JG |
2394 | param->responder_resources = IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg); |
2395 | param->initiator_depth = IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg); | |
b6bbee68 JG |
2396 | param->target_ack_delay = IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg); |
2397 | param->failover_accepted = IBA_GET(CM_REP_FAILOVER_ACCEPTED, rep_msg); | |
2398 | param->flow_control = IBA_GET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg); | |
2399 | param->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg); | |
2400 | param->srq = IBA_GET(CM_REP_SRQ, rep_msg); | |
a20652e1 LR |
2401 | param->ece.vendor_id = IBA_GET(CM_REP_VENDOR_ID_H, rep_msg) << 16; |
2402 | param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_M, rep_msg) << 8; | |
2403 | param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_L, rep_msg); | |
2404 | param->ece.attr_mod = be32_to_cpu(rep_msg->hdr.attr_mod); | |
2405 | ||
4ca662a3 JG |
2406 | work->cm_event.private_data = |
2407 | IBA_GET_MEM_PTR(CM_REP_PRIVATE_DATA, rep_msg); | |
a977049d HR |
2408 | } |
2409 | ||
2410 | static void cm_dup_rep_handler(struct cm_work *work) | |
2411 | { | |
2412 | struct cm_id_private *cm_id_priv; | |
2413 | struct cm_rep_msg *rep_msg; | |
2414 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2415 | int ret; |
2416 | ||
2417 | rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; | |
91b60a71 JG |
2418 | cm_id_priv = cm_acquire_id( |
2419 | cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)), | |
2420 | cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg))); | |
a977049d HR |
2421 | if (!cm_id_priv) |
2422 | return; | |
2423 | ||
526a12c8 JG |
2424 | atomic_long_inc( |
2425 | &work->port->counters[CM_RECV_DUPLICATES][CM_REP_COUNTER]); | |
a977049d HR |
2426 | ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
2427 | if (ret) | |
2428 | goto deref; | |
2429 | ||
24be6e81 | 2430 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2431 | if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
2432 | cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, | |
2433 | cm_id_priv->private_data, | |
2434 | cm_id_priv->private_data_len); | |
2435 | else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) | |
2436 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
2437 | CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, | |
2438 | cm_id_priv->private_data, | |
2439 | cm_id_priv->private_data_len); | |
2440 | else | |
2441 | goto unlock; | |
24be6e81 | 2442 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2443 | |
8dc105be | 2444 | trace_icm_send_dup_rep(&cm_id_priv->id); |
34816ad9 | 2445 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2446 | if (ret) |
2447 | goto free; | |
2448 | goto deref; | |
2449 | ||
24be6e81 | 2450 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
96376a40 | 2451 | free: cm_free_response_msg(msg); |
a977049d HR |
2452 | deref: cm_deref_id(cm_id_priv); |
2453 | } | |
2454 | ||
2455 | static int cm_rep_handler(struct cm_work *work) | |
2456 | { | |
2457 | struct cm_id_private *cm_id_priv; | |
2458 | struct cm_rep_msg *rep_msg; | |
a977049d | 2459 | int ret; |
9315bc9a | 2460 | struct cm_id_private *cur_cm_id_priv; |
9315bc9a | 2461 | struct cm_timewait_info *timewait_info; |
a977049d HR |
2462 | |
2463 | rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; | |
91b60a71 JG |
2464 | cm_id_priv = cm_acquire_id( |
2465 | cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)), 0); | |
a977049d HR |
2466 | if (!cm_id_priv) { |
2467 | cm_dup_rep_handler(work); | |
75874b3d | 2468 | trace_icm_remote_no_priv_err( |
91b60a71 | 2469 | IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)); |
a977049d HR |
2470 | return -EINVAL; |
2471 | } | |
2472 | ||
ef700446 | 2473 | cm_format_rep_event(work, cm_id_priv->qp_type); |
87fd1a11 | 2474 | |
24be6e81 | 2475 | spin_lock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
2476 | switch (cm_id_priv->id.state) { |
2477 | case IB_CM_REQ_SENT: | |
2478 | case IB_CM_MRA_REQ_RCVD: | |
2479 | break; | |
2480 | default: | |
87fd1a11 | 2481 | ret = -EINVAL; |
75874b3d | 2482 | trace_icm_rep_unknown_err( |
91b60a71 | 2483 | IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg), |
75874b3d CL |
2484 | IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg), |
2485 | cm_id_priv->id.state); | |
153a2e43 | 2486 | spin_unlock_irq(&cm_id_priv->lock); |
87fd1a11 SH |
2487 | goto error; |
2488 | } | |
2489 | ||
91b60a71 JG |
2490 | cm_id_priv->timewait_info->work.remote_id = |
2491 | cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg)); | |
2492 | cm_id_priv->timewait_info->remote_ca_guid = | |
2493 | cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg)); | |
ef700446 | 2494 | cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
a977049d | 2495 | |
87fd1a11 | 2496 | spin_lock(&cm.lock); |
a977049d HR |
2497 | /* Check for duplicate REP. */ |
2498 | if (cm_insert_remote_id(cm_id_priv->timewait_info)) { | |
87fd1a11 | 2499 | spin_unlock(&cm.lock); |
24be6e81 | 2500 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2501 | ret = -EINVAL; |
75874b3d | 2502 | trace_icm_insert_failed_err( |
91b60a71 | 2503 | IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)); |
a977049d HR |
2504 | goto error; |
2505 | } | |
2506 | /* Check for a stale connection. */ | |
9315bc9a HWR |
2507 | timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); |
2508 | if (timewait_info) { | |
9767a27e | 2509 | cm_remove_remote(cm_id_priv); |
4d6e8a03 | 2510 | cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id, |
9315bc9a HWR |
2511 | timewait_info->work.remote_id); |
2512 | ||
87fd1a11 | 2513 | spin_unlock(&cm.lock); |
24be6e81 | 2514 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2515 | cm_issue_rej(work->port, work->mad_recv_wc, |
2516 | IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, | |
2517 | NULL, 0); | |
2518 | ret = -EINVAL; | |
75874b3d CL |
2519 | trace_icm_staleconn_err( |
2520 | IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg), | |
91b60a71 | 2521 | IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)); |
119bf817 | 2522 | |
9315bc9a | 2523 | if (cur_cm_id_priv) { |
51e8463c | 2524 | ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0); |
9315bc9a HWR |
2525 | cm_deref_id(cur_cm_id_priv); |
2526 | } | |
2527 | ||
a977049d HR |
2528 | goto error; |
2529 | } | |
87fd1a11 | 2530 | spin_unlock(&cm.lock); |
a977049d | 2531 | |
a977049d | 2532 | cm_id_priv->id.state = IB_CM_REP_RCVD; |
91b60a71 JG |
2533 | cm_id_priv->id.remote_id = |
2534 | cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg)); | |
ef700446 | 2535 | cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
91b60a71 JG |
2536 | cm_id_priv->initiator_depth = |
2537 | IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg); | |
2538 | cm_id_priv->responder_resources = | |
2539 | IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg); | |
01adb7f4 | 2540 | cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg)); |
b6bbee68 JG |
2541 | cm_id_priv->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg); |
2542 | cm_id_priv->target_ack_delay = | |
2543 | IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg); | |
1d846126 SH |
2544 | cm_id_priv->av.timeout = |
2545 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2546 | cm_id_priv->av.timeout - 1); | |
2547 | cm_id_priv->alt_av.timeout = | |
2548 | cm_ack_timeout(cm_id_priv->target_ack_delay, | |
2549 | cm_id_priv->alt_av.timeout - 1); | |
a977049d | 2550 | |
70076a41 | 2551 | ib_cancel_mad(cm_id_priv->msg); |
e83f195a | 2552 | cm_queue_work_unlock(cm_id_priv, work); |
a977049d HR |
2553 | return 0; |
2554 | ||
87fd1a11 | 2555 | error: |
a977049d HR |
2556 | cm_deref_id(cm_id_priv); |
2557 | return ret; | |
2558 | } | |
2559 | ||
2560 | static int cm_establish_handler(struct cm_work *work) | |
2561 | { | |
2562 | struct cm_id_private *cm_id_priv; | |
a977049d | 2563 | |
e1444b5a | 2564 | /* See comment in cm_establish about lookup. */ |
a977049d HR |
2565 | cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
2566 | if (!cm_id_priv) | |
2567 | return -EINVAL; | |
2568 | ||
24be6e81 | 2569 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 2570 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
24be6e81 | 2571 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2572 | goto out; |
2573 | } | |
2574 | ||
70076a41 | 2575 | ib_cancel_mad(cm_id_priv->msg); |
e83f195a | 2576 | cm_queue_work_unlock(cm_id_priv, work); |
a977049d HR |
2577 | return 0; |
2578 | out: | |
2579 | cm_deref_id(cm_id_priv); | |
2580 | return -EINVAL; | |
2581 | } | |
2582 | ||
2583 | static int cm_rtu_handler(struct cm_work *work) | |
2584 | { | |
2585 | struct cm_id_private *cm_id_priv; | |
2586 | struct cm_rtu_msg *rtu_msg; | |
a977049d HR |
2587 | |
2588 | rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; | |
91b60a71 JG |
2589 | cm_id_priv = cm_acquire_id( |
2590 | cpu_to_be32(IBA_GET(CM_RTU_REMOTE_COMM_ID, rtu_msg)), | |
2591 | cpu_to_be32(IBA_GET(CM_RTU_LOCAL_COMM_ID, rtu_msg))); | |
a977049d HR |
2592 | if (!cm_id_priv) |
2593 | return -EINVAL; | |
2594 | ||
4ca662a3 JG |
2595 | work->cm_event.private_data = |
2596 | IBA_GET_MEM_PTR(CM_RTU_PRIVATE_DATA, rtu_msg); | |
a977049d | 2597 | |
24be6e81 | 2598 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2599 | if (cm_id_priv->id.state != IB_CM_REP_SENT && |
2600 | cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { | |
24be6e81 | 2601 | spin_unlock_irq(&cm_id_priv->lock); |
526a12c8 JG |
2602 | atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] |
2603 | [CM_RTU_COUNTER]); | |
a977049d HR |
2604 | goto out; |
2605 | } | |
2606 | cm_id_priv->id.state = IB_CM_ESTABLISHED; | |
2607 | ||
70076a41 | 2608 | ib_cancel_mad(cm_id_priv->msg); |
e83f195a | 2609 | cm_queue_work_unlock(cm_id_priv, work); |
a977049d HR |
2610 | return 0; |
2611 | out: | |
2612 | cm_deref_id(cm_id_priv); | |
2613 | return -EINVAL; | |
2614 | } | |
2615 | ||
2616 | static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, | |
2617 | struct cm_id_private *cm_id_priv, | |
2618 | const void *private_data, | |
2619 | u8 private_data_len) | |
2620 | { | |
2621 | cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, | |
87a37ce9 | 2622 | cm_form_tid(cm_id_priv)); |
91b60a71 JG |
2623 | IBA_SET(CM_DREQ_LOCAL_COMM_ID, dreq_msg, |
2624 | be32_to_cpu(cm_id_priv->id.local_id)); | |
2625 | IBA_SET(CM_DREQ_REMOTE_COMM_ID, dreq_msg, | |
2626 | be32_to_cpu(cm_id_priv->id.remote_id)); | |
01adb7f4 JG |
2627 | IBA_SET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg, |
2628 | be32_to_cpu(cm_id_priv->remote_qpn)); | |
a977049d HR |
2629 | |
2630 | if (private_data && private_data_len) | |
4ca662a3 JG |
2631 | IBA_SET_MEM(CM_DREQ_PRIVATE_DATA, dreq_msg, private_data, |
2632 | private_data_len); | |
a977049d HR |
2633 | } |
2634 | ||
e029fdc0 JG |
2635 | static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv, |
2636 | const void *private_data, u8 private_data_len) | |
a977049d | 2637 | { |
a977049d | 2638 | struct ib_mad_send_buf *msg; |
a977049d HR |
2639 | int ret; |
2640 | ||
e029fdc0 JG |
2641 | lockdep_assert_held(&cm_id_priv->lock); |
2642 | ||
a977049d HR |
2643 | if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) |
2644 | return -EINVAL; | |
2645 | ||
e029fdc0 | 2646 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
75874b3d | 2647 | trace_icm_dreq_skipped(&cm_id_priv->id); |
e029fdc0 | 2648 | return -EINVAL; |
a977049d HR |
2649 | } |
2650 | ||
e029fdc0 JG |
2651 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT || |
2652 | cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
70076a41 | 2653 | ib_cancel_mad(cm_id_priv->msg); |
8d8ac865 | 2654 | |
4b4e586e JG |
2655 | msg = cm_alloc_priv_msg(cm_id_priv); |
2656 | if (IS_ERR(msg)) { | |
a977049d | 2657 | cm_enter_timewait(cm_id_priv); |
4b4e586e | 2658 | return PTR_ERR(msg); |
a977049d HR |
2659 | } |
2660 | ||
2661 | cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, | |
2662 | private_data, private_data_len); | |
34816ad9 | 2663 | msg->timeout_ms = cm_id_priv->timeout_ms; |
a977049d HR |
2664 | msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
2665 | ||
8dc105be | 2666 | trace_icm_send_dreq(&cm_id_priv->id); |
34816ad9 | 2667 | ret = ib_post_send_mad(msg, NULL); |
a977049d HR |
2668 | if (ret) { |
2669 | cm_enter_timewait(cm_id_priv); | |
4b4e586e | 2670 | cm_free_priv_msg(msg); |
a977049d HR |
2671 | return ret; |
2672 | } | |
2673 | ||
e029fdc0 | 2674 | cm_id_priv->id.state = IB_CM_DREQ_SENT; |
e029fdc0 JG |
2675 | return 0; |
2676 | } | |
2677 | ||
2678 | int ib_send_cm_dreq(struct ib_cm_id *cm_id, const void *private_data, | |
2679 | u8 private_data_len) | |
2680 | { | |
2681 | struct cm_id_private *cm_id_priv = | |
2682 | container_of(cm_id, struct cm_id_private, id); | |
2683 | unsigned long flags; | |
2684 | int ret; | |
2685 | ||
2686 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2687 | ret = cm_send_dreq_locked(cm_id_priv, private_data, private_data_len); | |
2688 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
2689 | return ret; |
2690 | } | |
2691 | EXPORT_SYMBOL(ib_send_cm_dreq); | |
2692 | ||
2693 | static void cm_format_drep(struct cm_drep_msg *drep_msg, | |
2694 | struct cm_id_private *cm_id_priv, | |
2695 | const void *private_data, | |
2696 | u8 private_data_len) | |
2697 | { | |
2698 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); | |
91b60a71 JG |
2699 | IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg, |
2700 | be32_to_cpu(cm_id_priv->id.local_id)); | |
2701 | IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg, | |
2702 | be32_to_cpu(cm_id_priv->id.remote_id)); | |
a977049d HR |
2703 | |
2704 | if (private_data && private_data_len) | |
4ca662a3 JG |
2705 | IBA_SET_MEM(CM_DREP_PRIVATE_DATA, drep_msg, private_data, |
2706 | private_data_len); | |
a977049d HR |
2707 | } |
2708 | ||
87cabf3e JG |
2709 | static int cm_send_drep_locked(struct cm_id_private *cm_id_priv, |
2710 | void *private_data, u8 private_data_len) | |
a977049d | 2711 | { |
a977049d | 2712 | struct ib_mad_send_buf *msg; |
a977049d HR |
2713 | int ret; |
2714 | ||
87cabf3e JG |
2715 | lockdep_assert_held(&cm_id_priv->lock); |
2716 | ||
a977049d HR |
2717 | if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) |
2718 | return -EINVAL; | |
2719 | ||
87cabf3e | 2720 | if (cm_id_priv->id.state != IB_CM_DREQ_RCVD) { |
75874b3d | 2721 | trace_icm_send_drep_err(&cm_id_priv->id); |
87cabf3e | 2722 | kfree(private_data); |
a977049d HR |
2723 | return -EINVAL; |
2724 | } | |
2725 | ||
87cabf3e | 2726 | cm_set_private_data(cm_id_priv, private_data, private_data_len); |
a977049d HR |
2727 | cm_enter_timewait(cm_id_priv); |
2728 | ||
4b4e586e JG |
2729 | msg = cm_alloc_msg(cm_id_priv); |
2730 | if (IS_ERR(msg)) | |
2731 | return PTR_ERR(msg); | |
a977049d HR |
2732 | |
2733 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2734 | private_data, private_data_len); | |
2735 | ||
8dc105be | 2736 | trace_icm_send_drep(&cm_id_priv->id); |
34816ad9 | 2737 | ret = ib_post_send_mad(msg, NULL); |
a977049d | 2738 | if (ret) { |
a977049d HR |
2739 | cm_free_msg(msg); |
2740 | return ret; | |
2741 | } | |
87cabf3e JG |
2742 | return 0; |
2743 | } | |
a977049d | 2744 | |
87cabf3e JG |
2745 | int ib_send_cm_drep(struct ib_cm_id *cm_id, const void *private_data, |
2746 | u8 private_data_len) | |
2747 | { | |
2748 | struct cm_id_private *cm_id_priv = | |
2749 | container_of(cm_id, struct cm_id_private, id); | |
2750 | unsigned long flags; | |
2751 | void *data; | |
2752 | int ret; | |
2753 | ||
2754 | data = cm_copy_private_data(private_data, private_data_len); | |
2755 | if (IS_ERR(data)) | |
2756 | return PTR_ERR(data); | |
2757 | ||
2758 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2759 | ret = cm_send_drep_locked(cm_id_priv, data, private_data_len); | |
2760 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
2761 | return ret; |
2762 | } | |
2763 | EXPORT_SYMBOL(ib_send_cm_drep); | |
2764 | ||
82a9c16a SH |
2765 | static int cm_issue_drep(struct cm_port *port, |
2766 | struct ib_mad_recv_wc *mad_recv_wc) | |
2767 | { | |
2768 | struct ib_mad_send_buf *msg = NULL; | |
2769 | struct cm_dreq_msg *dreq_msg; | |
2770 | struct cm_drep_msg *drep_msg; | |
2771 | int ret; | |
2772 | ||
2773 | ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); | |
2774 | if (ret) | |
2775 | return ret; | |
2776 | ||
2777 | dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; | |
2778 | drep_msg = (struct cm_drep_msg *) msg->mad; | |
2779 | ||
2780 | cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); | |
91b60a71 JG |
2781 | IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg, |
2782 | IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg)); | |
2783 | IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg, | |
2784 | IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)); | |
82a9c16a | 2785 | |
8dc105be CL |
2786 | trace_icm_issue_drep( |
2787 | IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg), | |
2788 | IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)); | |
82a9c16a SH |
2789 | ret = ib_post_send_mad(msg, NULL); |
2790 | if (ret) | |
96376a40 | 2791 | cm_free_response_msg(msg); |
82a9c16a SH |
2792 | |
2793 | return ret; | |
2794 | } | |
2795 | ||
a977049d HR |
2796 | static int cm_dreq_handler(struct cm_work *work) |
2797 | { | |
2798 | struct cm_id_private *cm_id_priv; | |
2799 | struct cm_dreq_msg *dreq_msg; | |
2800 | struct ib_mad_send_buf *msg = NULL; | |
a977049d HR |
2801 | |
2802 | dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; | |
91b60a71 JG |
2803 | cm_id_priv = cm_acquire_id( |
2804 | cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)), | |
2805 | cpu_to_be32(IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg))); | |
82a9c16a | 2806 | if (!cm_id_priv) { |
526a12c8 JG |
2807 | atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] |
2808 | [CM_DREQ_COUNTER]); | |
82a9c16a | 2809 | cm_issue_drep(work->port, work->mad_recv_wc); |
75874b3d CL |
2810 | trace_icm_no_priv_err( |
2811 | IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg), | |
91b60a71 | 2812 | IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)); |
a977049d | 2813 | return -EINVAL; |
82a9c16a | 2814 | } |
a977049d | 2815 | |
4ca662a3 JG |
2816 | work->cm_event.private_data = |
2817 | IBA_GET_MEM_PTR(CM_DREQ_PRIVATE_DATA, dreq_msg); | |
a977049d | 2818 | |
24be6e81 | 2819 | spin_lock_irq(&cm_id_priv->lock); |
01adb7f4 JG |
2820 | if (cm_id_priv->local_qpn != |
2821 | cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg))) | |
a977049d HR |
2822 | goto unlock; |
2823 | ||
2824 | switch (cm_id_priv->id.state) { | |
2825 | case IB_CM_REP_SENT: | |
2826 | case IB_CM_DREQ_SENT: | |
7b17f979 | 2827 | case IB_CM_MRA_REP_RCVD: |
70076a41 | 2828 | ib_cancel_mad(cm_id_priv->msg); |
a977049d HR |
2829 | break; |
2830 | case IB_CM_ESTABLISHED: | |
8d8ac865 SH |
2831 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT || |
2832 | cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) | |
70076a41 | 2833 | ib_cancel_mad(cm_id_priv->msg); |
8d8ac865 | 2834 | break; |
a977049d | 2835 | case IB_CM_TIMEWAIT: |
526a12c8 JG |
2836 | atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] |
2837 | [CM_DREQ_COUNTER]); | |
c7616118 RD |
2838 | msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc); |
2839 | if (IS_ERR(msg)) | |
a977049d HR |
2840 | goto unlock; |
2841 | ||
2842 | cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, | |
2843 | cm_id_priv->private_data, | |
2844 | cm_id_priv->private_data_len); | |
24be6e81 | 2845 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 2846 | |
c7616118 RD |
2847 | if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) || |
2848 | ib_post_send_mad(msg, NULL)) | |
96376a40 | 2849 | cm_free_response_msg(msg); |
a977049d | 2850 | goto deref; |
9af57b7a | 2851 | case IB_CM_DREQ_RCVD: |
526a12c8 JG |
2852 | atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] |
2853 | [CM_DREQ_COUNTER]); | |
9af57b7a | 2854 | goto unlock; |
a977049d | 2855 | default: |
75874b3d | 2856 | trace_icm_dreq_unknown_err(&cm_id_priv->id); |
a977049d HR |
2857 | goto unlock; |
2858 | } | |
2859 | cm_id_priv->id.state = IB_CM_DREQ_RCVD; | |
2860 | cm_id_priv->tid = dreq_msg->hdr.tid; | |
e83f195a | 2861 | cm_queue_work_unlock(cm_id_priv, work); |
a977049d HR |
2862 | return 0; |
2863 | ||
24be6e81 | 2864 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2865 | deref: cm_deref_id(cm_id_priv); |
2866 | return -EINVAL; | |
2867 | } | |
2868 | ||
2869 | static int cm_drep_handler(struct cm_work *work) | |
2870 | { | |
2871 | struct cm_id_private *cm_id_priv; | |
2872 | struct cm_drep_msg *drep_msg; | |
a977049d HR |
2873 | |
2874 | drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; | |
91b60a71 JG |
2875 | cm_id_priv = cm_acquire_id( |
2876 | cpu_to_be32(IBA_GET(CM_DREP_REMOTE_COMM_ID, drep_msg)), | |
2877 | cpu_to_be32(IBA_GET(CM_DREP_LOCAL_COMM_ID, drep_msg))); | |
a977049d HR |
2878 | if (!cm_id_priv) |
2879 | return -EINVAL; | |
2880 | ||
4ca662a3 JG |
2881 | work->cm_event.private_data = |
2882 | IBA_GET_MEM_PTR(CM_DREP_PRIVATE_DATA, drep_msg); | |
a977049d | 2883 | |
24be6e81 | 2884 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
2885 | if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
2886 | cm_id_priv->id.state != IB_CM_DREQ_RCVD) { | |
24be6e81 | 2887 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
2888 | goto out; |
2889 | } | |
2890 | cm_enter_timewait(cm_id_priv); | |
2891 | ||
70076a41 | 2892 | ib_cancel_mad(cm_id_priv->msg); |
e83f195a | 2893 | cm_queue_work_unlock(cm_id_priv, work); |
a977049d HR |
2894 | return 0; |
2895 | out: | |
2896 | cm_deref_id(cm_id_priv); | |
2897 | return -EINVAL; | |
2898 | } | |
2899 | ||
81ddb41f JG |
2900 | static int cm_send_rej_locked(struct cm_id_private *cm_id_priv, |
2901 | enum ib_cm_rej_reason reason, void *ari, | |
2902 | u8 ari_length, const void *private_data, | |
2903 | u8 private_data_len) | |
a977049d | 2904 | { |
0c6949c3 | 2905 | enum ib_cm_state state = cm_id_priv->id.state; |
a977049d | 2906 | struct ib_mad_send_buf *msg; |
a977049d HR |
2907 | int ret; |
2908 | ||
81ddb41f JG |
2909 | lockdep_assert_held(&cm_id_priv->lock); |
2910 | ||
a977049d HR |
2911 | if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || |
2912 | (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) | |
2913 | return -EINVAL; | |
2914 | ||
0c6949c3 | 2915 | switch (state) { |
a977049d HR |
2916 | case IB_CM_REQ_SENT: |
2917 | case IB_CM_MRA_REQ_RCVD: | |
2918 | case IB_CM_REQ_RCVD: | |
2919 | case IB_CM_MRA_REQ_SENT: | |
2920 | case IB_CM_REP_RCVD: | |
2921 | case IB_CM_MRA_REP_SENT: | |
a977049d | 2922 | cm_reset_to_idle(cm_id_priv); |
4b4e586e JG |
2923 | msg = cm_alloc_msg(cm_id_priv); |
2924 | if (IS_ERR(msg)) | |
2925 | return PTR_ERR(msg); | |
81ddb41f | 2926 | cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason, |
0c6949c3 LR |
2927 | ari, ari_length, private_data, private_data_len, |
2928 | state); | |
a977049d HR |
2929 | break; |
2930 | case IB_CM_REP_SENT: | |
2931 | case IB_CM_MRA_REP_RCVD: | |
a977049d | 2932 | cm_enter_timewait(cm_id_priv); |
4b4e586e JG |
2933 | msg = cm_alloc_msg(cm_id_priv); |
2934 | if (IS_ERR(msg)) | |
2935 | return PTR_ERR(msg); | |
81ddb41f | 2936 | cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason, |
0c6949c3 LR |
2937 | ari, ari_length, private_data, private_data_len, |
2938 | state); | |
a977049d HR |
2939 | break; |
2940 | default: | |
75874b3d | 2941 | trace_icm_send_unknown_rej_err(&cm_id_priv->id); |
81ddb41f | 2942 | return -EINVAL; |
a977049d HR |
2943 | } |
2944 | ||
8dc105be | 2945 | trace_icm_send_rej(&cm_id_priv->id, reason); |
34816ad9 | 2946 | ret = ib_post_send_mad(msg, NULL); |
81ddb41f | 2947 | if (ret) { |
a977049d | 2948 | cm_free_msg(msg); |
81ddb41f JG |
2949 | return ret; |
2950 | } | |
a977049d | 2951 | |
81ddb41f JG |
2952 | return 0; |
2953 | } | |
2954 | ||
2955 | int ib_send_cm_rej(struct ib_cm_id *cm_id, enum ib_cm_rej_reason reason, | |
2956 | void *ari, u8 ari_length, const void *private_data, | |
2957 | u8 private_data_len) | |
2958 | { | |
2959 | struct cm_id_private *cm_id_priv = | |
2960 | container_of(cm_id, struct cm_id_private, id); | |
2961 | unsigned long flags; | |
2962 | int ret; | |
2963 | ||
2964 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
2965 | ret = cm_send_rej_locked(cm_id_priv, reason, ari, ari_length, | |
2966 | private_data, private_data_len); | |
2967 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
2968 | return ret; |
2969 | } | |
2970 | EXPORT_SYMBOL(ib_send_cm_rej); | |
2971 | ||
2972 | static void cm_format_rej_event(struct cm_work *work) | |
2973 | { | |
2974 | struct cm_rej_msg *rej_msg; | |
2975 | struct ib_cm_rej_event_param *param; | |
2976 | ||
2977 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
2978 | param = &work->cm_event.param.rej_rcvd; | |
4ca662a3 | 2979 | param->ari = IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg); |
b6bbee68 | 2980 | param->ari_length = IBA_GET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg); |
91b60a71 | 2981 | param->reason = IBA_GET(CM_REJ_REASON, rej_msg); |
4ca662a3 JG |
2982 | work->cm_event.private_data = |
2983 | IBA_GET_MEM_PTR(CM_REJ_PRIVATE_DATA, rej_msg); | |
a977049d HR |
2984 | } |
2985 | ||
f681967a | 2986 | static struct cm_id_private *cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) |
a977049d | 2987 | { |
a977049d | 2988 | struct cm_id_private *cm_id_priv; |
97f52eb4 | 2989 | __be32 remote_id; |
a977049d | 2990 | |
91b60a71 | 2991 | remote_id = cpu_to_be32(IBA_GET(CM_REJ_LOCAL_COMM_ID, rej_msg)); |
a977049d | 2992 | |
91b60a71 | 2993 | if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_TIMEOUT) { |
cfa68b0d | 2994 | cm_id_priv = cm_find_remote_id( |
4ca662a3 JG |
2995 | *((__be64 *)IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg)), |
2996 | remote_id); | |
b6bbee68 JG |
2997 | } else if (IBA_GET(CM_REJ_MESSAGE_REJECTED, rej_msg) == |
2998 | CM_MSG_RESPONSE_REQ) | |
91b60a71 JG |
2999 | cm_id_priv = cm_acquire_id( |
3000 | cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)), | |
3001 | 0); | |
a977049d | 3002 | else |
91b60a71 JG |
3003 | cm_id_priv = cm_acquire_id( |
3004 | cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)), | |
3005 | remote_id); | |
a977049d HR |
3006 | |
3007 | return cm_id_priv; | |
3008 | } | |
3009 | ||
3010 | static int cm_rej_handler(struct cm_work *work) | |
3011 | { | |
3012 | struct cm_id_private *cm_id_priv; | |
3013 | struct cm_rej_msg *rej_msg; | |
a977049d HR |
3014 | |
3015 | rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; | |
3016 | cm_id_priv = cm_acquire_rejected_id(rej_msg); | |
3017 | if (!cm_id_priv) | |
3018 | return -EINVAL; | |
3019 | ||
3020 | cm_format_rej_event(work); | |
3021 | ||
24be6e81 | 3022 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3023 | switch (cm_id_priv->id.state) { |
3024 | case IB_CM_REQ_SENT: | |
3025 | case IB_CM_MRA_REQ_RCVD: | |
3026 | case IB_CM_REP_SENT: | |
3027 | case IB_CM_MRA_REP_RCVD: | |
70076a41 | 3028 | ib_cancel_mad(cm_id_priv->msg); |
df561f66 | 3029 | fallthrough; |
a977049d HR |
3030 | case IB_CM_REQ_RCVD: |
3031 | case IB_CM_MRA_REQ_SENT: | |
91b60a71 | 3032 | if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_STALE_CONN) |
a977049d HR |
3033 | cm_enter_timewait(cm_id_priv); |
3034 | else | |
3035 | cm_reset_to_idle(cm_id_priv); | |
3036 | break; | |
3037 | case IB_CM_DREQ_SENT: | |
70076a41 | 3038 | ib_cancel_mad(cm_id_priv->msg); |
df561f66 | 3039 | fallthrough; |
a977049d HR |
3040 | case IB_CM_REP_RCVD: |
3041 | case IB_CM_MRA_REP_SENT: | |
a977049d HR |
3042 | cm_enter_timewait(cm_id_priv); |
3043 | break; | |
8d8ac865 SH |
3044 | case IB_CM_ESTABLISHED: |
3045 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT || | |
3046 | cm_id_priv->id.lap_state == IB_CM_LAP_SENT) { | |
3047 | if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT) | |
70076a41 | 3048 | ib_cancel_mad(cm_id_priv->msg); |
8d8ac865 SH |
3049 | cm_enter_timewait(cm_id_priv); |
3050 | break; | |
3051 | } | |
df561f66 | 3052 | fallthrough; |
a977049d | 3053 | default: |
75874b3d | 3054 | trace_icm_rej_unknown_err(&cm_id_priv->id); |
153a2e43 | 3055 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3056 | goto out; |
3057 | } | |
3058 | ||
e83f195a | 3059 | cm_queue_work_unlock(cm_id_priv, work); |
a977049d HR |
3060 | return 0; |
3061 | out: | |
3062 | cm_deref_id(cm_id_priv); | |
3063 | return -EINVAL; | |
3064 | } | |
3065 | ||
3066 | int ib_send_cm_mra(struct ib_cm_id *cm_id, | |
3067 | u8 service_timeout, | |
3068 | const void *private_data, | |
3069 | u8 private_data_len) | |
3070 | { | |
3071 | struct cm_id_private *cm_id_priv; | |
3072 | struct ib_mad_send_buf *msg; | |
de98b693 SH |
3073 | enum ib_cm_state cm_state; |
3074 | enum ib_cm_lap_state lap_state; | |
3075 | enum cm_msg_response msg_response; | |
a977049d HR |
3076 | void *data; |
3077 | unsigned long flags; | |
3078 | int ret; | |
3079 | ||
3080 | if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) | |
3081 | return -EINVAL; | |
3082 | ||
3083 | data = cm_copy_private_data(private_data, private_data_len); | |
3084 | if (IS_ERR(data)) | |
3085 | return PTR_ERR(data); | |
3086 | ||
3087 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3088 | ||
3089 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
9516b8f9 | 3090 | switch (cm_id_priv->id.state) { |
a977049d | 3091 | case IB_CM_REQ_RCVD: |
de98b693 SH |
3092 | cm_state = IB_CM_MRA_REQ_SENT; |
3093 | lap_state = cm_id->lap_state; | |
3094 | msg_response = CM_MSG_RESPONSE_REQ; | |
a977049d HR |
3095 | break; |
3096 | case IB_CM_REP_RCVD: | |
de98b693 SH |
3097 | cm_state = IB_CM_MRA_REP_SENT; |
3098 | lap_state = cm_id->lap_state; | |
3099 | msg_response = CM_MSG_RESPONSE_REP; | |
a977049d HR |
3100 | break; |
3101 | case IB_CM_ESTABLISHED: | |
50a025c6 SH |
3102 | if (cm_id->lap_state == IB_CM_LAP_RCVD) { |
3103 | cm_state = cm_id->state; | |
3104 | lap_state = IB_CM_MRA_LAP_SENT; | |
3105 | msg_response = CM_MSG_RESPONSE_OTHER; | |
3106 | break; | |
3107 | } | |
df561f66 | 3108 | fallthrough; |
de98b693 | 3109 | default: |
75874b3d | 3110 | trace_icm_send_mra_unknown_err(&cm_id_priv->id); |
de98b693 | 3111 | ret = -EINVAL; |
4b4e586e | 3112 | goto error_unlock; |
de98b693 SH |
3113 | } |
3114 | ||
3115 | if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { | |
4b4e586e JG |
3116 | msg = cm_alloc_msg(cm_id_priv); |
3117 | if (IS_ERR(msg)) { | |
3118 | ret = PTR_ERR(msg); | |
3119 | goto error_unlock; | |
3120 | } | |
a977049d HR |
3121 | |
3122 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
de98b693 | 3123 | msg_response, service_timeout, |
a977049d | 3124 | private_data, private_data_len); |
8dc105be | 3125 | trace_icm_send_mra(cm_id); |
34816ad9 | 3126 | ret = ib_post_send_mad(msg, NULL); |
a977049d | 3127 | if (ret) |
4b4e586e | 3128 | goto error_free_msg; |
a977049d | 3129 | } |
de98b693 SH |
3130 | |
3131 | cm_id->state = cm_state; | |
3132 | cm_id->lap_state = lap_state; | |
a977049d HR |
3133 | cm_id_priv->service_timeout = service_timeout; |
3134 | cm_set_private_data(cm_id_priv, data, private_data_len); | |
3135 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3136 | return 0; | |
3137 | ||
4b4e586e | 3138 | error_free_msg: |
a977049d | 3139 | cm_free_msg(msg); |
4b4e586e JG |
3140 | error_unlock: |
3141 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3142 | kfree(data); | |
a977049d HR |
3143 | return ret; |
3144 | } | |
3145 | EXPORT_SYMBOL(ib_send_cm_mra); | |
3146 | ||
f681967a | 3147 | static struct cm_id_private *cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) |
a977049d | 3148 | { |
b6bbee68 | 3149 | switch (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg)) { |
a977049d | 3150 | case CM_MSG_RESPONSE_REQ: |
91b60a71 JG |
3151 | return cm_acquire_id( |
3152 | cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)), | |
3153 | 0); | |
a977049d HR |
3154 | case CM_MSG_RESPONSE_REP: |
3155 | case CM_MSG_RESPONSE_OTHER: | |
91b60a71 JG |
3156 | return cm_acquire_id( |
3157 | cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)), | |
3158 | cpu_to_be32(IBA_GET(CM_MRA_LOCAL_COMM_ID, mra_msg))); | |
a977049d HR |
3159 | default: |
3160 | return NULL; | |
3161 | } | |
3162 | } | |
3163 | ||
3164 | static int cm_mra_handler(struct cm_work *work) | |
3165 | { | |
3166 | struct cm_id_private *cm_id_priv; | |
3167 | struct cm_mra_msg *mra_msg; | |
e83f195a | 3168 | int timeout; |
a977049d HR |
3169 | |
3170 | mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; | |
3171 | cm_id_priv = cm_acquire_mraed_id(mra_msg); | |
3172 | if (!cm_id_priv) | |
3173 | return -EINVAL; | |
3174 | ||
4ca662a3 JG |
3175 | work->cm_event.private_data = |
3176 | IBA_GET_MEM_PTR(CM_MRA_PRIVATE_DATA, mra_msg); | |
a977049d | 3177 | work->cm_event.param.mra_rcvd.service_timeout = |
b6bbee68 JG |
3178 | IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg); |
3179 | timeout = cm_convert_to_ms(IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg)) + | |
1d846126 | 3180 | cm_convert_to_ms(cm_id_priv->av.timeout); |
a977049d | 3181 | |
24be6e81 | 3182 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3183 | switch (cm_id_priv->id.state) { |
3184 | case IB_CM_REQ_SENT: | |
b6bbee68 JG |
3185 | if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) != |
3186 | CM_MSG_RESPONSE_REQ || | |
70076a41 | 3187 | ib_modify_mad(cm_id_priv->msg, timeout)) |
a977049d HR |
3188 | goto out; |
3189 | cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; | |
3190 | break; | |
3191 | case IB_CM_REP_SENT: | |
b6bbee68 JG |
3192 | if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) != |
3193 | CM_MSG_RESPONSE_REP || | |
70076a41 | 3194 | ib_modify_mad(cm_id_priv->msg, timeout)) |
a977049d HR |
3195 | goto out; |
3196 | cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; | |
3197 | break; | |
3198 | case IB_CM_ESTABLISHED: | |
b6bbee68 JG |
3199 | if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) != |
3200 | CM_MSG_RESPONSE_OTHER || | |
a977049d | 3201 | cm_id_priv->id.lap_state != IB_CM_LAP_SENT || |
70076a41 | 3202 | ib_modify_mad(cm_id_priv->msg, timeout)) { |
9af57b7a | 3203 | if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) |
526a12c8 JG |
3204 | atomic_long_inc( |
3205 | &work->port->counters[CM_RECV_DUPLICATES] | |
3206 | [CM_MRA_COUNTER]); | |
a977049d | 3207 | goto out; |
9af57b7a | 3208 | } |
a977049d HR |
3209 | cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
3210 | break; | |
9af57b7a SH |
3211 | case IB_CM_MRA_REQ_RCVD: |
3212 | case IB_CM_MRA_REP_RCVD: | |
526a12c8 JG |
3213 | atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] |
3214 | [CM_MRA_COUNTER]); | |
df561f66 | 3215 | fallthrough; |
a977049d | 3216 | default: |
75874b3d | 3217 | trace_icm_mra_unknown_err(&cm_id_priv->id); |
a977049d HR |
3218 | goto out; |
3219 | } | |
3220 | ||
3221 | cm_id_priv->msg->context[1] = (void *) (unsigned long) | |
3222 | cm_id_priv->id.state; | |
e83f195a | 3223 | cm_queue_work_unlock(cm_id_priv, work); |
a977049d HR |
3224 | return 0; |
3225 | out: | |
24be6e81 | 3226 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3227 | cm_deref_id(cm_id_priv); |
3228 | return -EINVAL; | |
3229 | } | |
3230 | ||
ac3a949f DC |
3231 | static void cm_format_path_lid_from_lap(struct cm_lap_msg *lap_msg, |
3232 | struct sa_path_rec *path) | |
3233 | { | |
3234 | u32 lid; | |
3235 | ||
3236 | if (path->rec_type != SA_PATH_REC_TYPE_OPA) { | |
91b60a71 JG |
3237 | sa_path_set_dlid(path, IBA_GET(CM_LAP_ALTERNATE_LOCAL_PORT_LID, |
3238 | lap_msg)); | |
3239 | sa_path_set_slid(path, IBA_GET(CM_LAP_ALTERNATE_REMOTE_PORT_LID, | |
3240 | lap_msg)); | |
ac3a949f | 3241 | } else { |
4ca662a3 JG |
3242 | lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
3243 | CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg)); | |
9d187177 | 3244 | sa_path_set_dlid(path, lid); |
ac3a949f | 3245 | |
4ca662a3 JG |
3246 | lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
3247 | CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg)); | |
9d187177 | 3248 | sa_path_set_slid(path, lid); |
ac3a949f DC |
3249 | } |
3250 | } | |
3251 | ||
e1444b5a | 3252 | static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
c2f8fc4e | 3253 | struct sa_path_rec *path, |
a977049d HR |
3254 | struct cm_lap_msg *lap_msg) |
3255 | { | |
4ca662a3 JG |
3256 | path->dgid = *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg); |
3257 | path->sgid = | |
3258 | *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg); | |
01adb7f4 JG |
3259 | path->flow_label = |
3260 | cpu_to_be32(IBA_GET(CM_LAP_ALTERNATE_FLOW_LABEL, lap_msg)); | |
91b60a71 | 3261 | path->hop_limit = IBA_GET(CM_LAP_ALTERNATE_HOP_LIMIT, lap_msg); |
b6bbee68 | 3262 | path->traffic_class = IBA_GET(CM_LAP_ALTERNATE_TRAFFIC_CLASS, lap_msg); |
a977049d | 3263 | path->reversible = 1; |
e1444b5a | 3264 | path->pkey = cm_id_priv->pkey; |
b6bbee68 | 3265 | path->sl = IBA_GET(CM_LAP_ALTERNATE_SL, lap_msg); |
a977049d | 3266 | path->mtu_selector = IB_SA_EQ; |
e1444b5a | 3267 | path->mtu = cm_id_priv->path_mtu; |
a977049d | 3268 | path->rate_selector = IB_SA_EQ; |
b6bbee68 | 3269 | path->rate = IBA_GET(CM_LAP_ALTERNATE_PACKET_RATE, lap_msg); |
a977049d | 3270 | path->packet_life_time_selector = IB_SA_EQ; |
b6bbee68 JG |
3271 | path->packet_life_time = |
3272 | IBA_GET(CM_LAP_ALTERNATE_LOCAL_ACK_TIMEOUT, lap_msg); | |
a977049d | 3273 | path->packet_life_time -= (path->packet_life_time > 0); |
ac3a949f | 3274 | cm_format_path_lid_from_lap(lap_msg, path); |
a977049d HR |
3275 | } |
3276 | ||
3277 | static int cm_lap_handler(struct cm_work *work) | |
3278 | { | |
3279 | struct cm_id_private *cm_id_priv; | |
3280 | struct cm_lap_msg *lap_msg; | |
3281 | struct ib_cm_lap_event_param *param; | |
3282 | struct ib_mad_send_buf *msg = NULL; | |
7345201c MZ |
3283 | struct rdma_ah_attr ah_attr; |
3284 | struct cm_av alt_av = {}; | |
a977049d HR |
3285 | int ret; |
3286 | ||
97c45c2c PP |
3287 | /* Currently Alternate path messages are not supported for |
3288 | * RoCE link layer. | |
3289 | */ | |
3290 | if (rdma_protocol_roce(work->port->cm_dev->ib_device, | |
3291 | work->port->port_num)) | |
3292 | return -EINVAL; | |
3293 | ||
a977049d HR |
3294 | /* todo: verify LAP request and send reject APR if invalid. */ |
3295 | lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; | |
91b60a71 JG |
3296 | cm_id_priv = cm_acquire_id( |
3297 | cpu_to_be32(IBA_GET(CM_LAP_REMOTE_COMM_ID, lap_msg)), | |
3298 | cpu_to_be32(IBA_GET(CM_LAP_LOCAL_COMM_ID, lap_msg))); | |
a977049d HR |
3299 | if (!cm_id_priv) |
3300 | return -EINVAL; | |
3301 | ||
3302 | param = &work->cm_event.param.lap_rcvd; | |
6b3c0e6e DC |
3303 | memset(&work->path[0], 0, sizeof(work->path[1])); |
3304 | cm_path_set_rec_type(work->port->cm_dev->ib_device, | |
4ca662a3 JG |
3305 | work->port->port_num, &work->path[0], |
3306 | IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID, | |
3307 | lap_msg)); | |
a977049d | 3308 | param->alternate_path = &work->path[0]; |
e1444b5a | 3309 | cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
4ca662a3 JG |
3310 | work->cm_event.private_data = |
3311 | IBA_GET_MEM_PTR(CM_LAP_PRIVATE_DATA, lap_msg); | |
a977049d | 3312 | |
7345201c MZ |
3313 | ret = ib_init_ah_attr_from_wc(work->port->cm_dev->ib_device, |
3314 | work->port->port_num, | |
3315 | work->mad_recv_wc->wc, | |
3316 | work->mad_recv_wc->recv_buf.grh, | |
3317 | &ah_attr); | |
3318 | if (ret) | |
3319 | goto deref; | |
3320 | ||
3321 | ret = cm_init_av_by_path(param->alternate_path, NULL, &alt_av); | |
3322 | if (ret) { | |
3323 | rdma_destroy_ah_attr(&ah_attr); | |
1264cabd | 3324 | goto deref; |
7345201c MZ |
3325 | } |
3326 | ||
24be6e81 | 3327 | spin_lock_irq(&cm_id_priv->lock); |
7345201c MZ |
3328 | cm_init_av_for_lap(work->port, work->mad_recv_wc->wc, |
3329 | &ah_attr, &cm_id_priv->av); | |
3330 | cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av); | |
3331 | ||
a977049d HR |
3332 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
3333 | goto unlock; | |
3334 | ||
3335 | switch (cm_id_priv->id.lap_state) { | |
e1444b5a | 3336 | case IB_CM_LAP_UNINIT: |
a977049d HR |
3337 | case IB_CM_LAP_IDLE: |
3338 | break; | |
3339 | case IB_CM_MRA_LAP_SENT: | |
526a12c8 JG |
3340 | atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] |
3341 | [CM_LAP_COUNTER]); | |
c7616118 RD |
3342 | msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc); |
3343 | if (IS_ERR(msg)) | |
a977049d HR |
3344 | goto unlock; |
3345 | ||
3346 | cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, | |
3347 | CM_MSG_RESPONSE_OTHER, | |
3348 | cm_id_priv->service_timeout, | |
3349 | cm_id_priv->private_data, | |
3350 | cm_id_priv->private_data_len); | |
24be6e81 | 3351 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 3352 | |
c7616118 RD |
3353 | if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) || |
3354 | ib_post_send_mad(msg, NULL)) | |
96376a40 | 3355 | cm_free_response_msg(msg); |
a977049d | 3356 | goto deref; |
9af57b7a | 3357 | case IB_CM_LAP_RCVD: |
526a12c8 JG |
3358 | atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] |
3359 | [CM_LAP_COUNTER]); | |
9af57b7a | 3360 | goto unlock; |
a977049d HR |
3361 | default: |
3362 | goto unlock; | |
3363 | } | |
3364 | ||
a5c57d32 PP |
3365 | cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; |
3366 | cm_id_priv->tid = lap_msg->hdr.tid; | |
e83f195a | 3367 | cm_queue_work_unlock(cm_id_priv, work); |
a977049d HR |
3368 | return 0; |
3369 | ||
24be6e81 | 3370 | unlock: spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3371 | deref: cm_deref_id(cm_id_priv); |
3372 | return -EINVAL; | |
3373 | } | |
3374 | ||
a977049d HR |
3375 | static int cm_apr_handler(struct cm_work *work) |
3376 | { | |
3377 | struct cm_id_private *cm_id_priv; | |
3378 | struct cm_apr_msg *apr_msg; | |
a977049d | 3379 | |
97c45c2c PP |
3380 | /* Currently Alternate path messages are not supported for |
3381 | * RoCE link layer. | |
3382 | */ | |
3383 | if (rdma_protocol_roce(work->port->cm_dev->ib_device, | |
3384 | work->port->port_num)) | |
3385 | return -EINVAL; | |
3386 | ||
a977049d | 3387 | apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; |
91b60a71 JG |
3388 | cm_id_priv = cm_acquire_id( |
3389 | cpu_to_be32(IBA_GET(CM_APR_REMOTE_COMM_ID, apr_msg)), | |
3390 | cpu_to_be32(IBA_GET(CM_APR_LOCAL_COMM_ID, apr_msg))); | |
a977049d HR |
3391 | if (!cm_id_priv) |
3392 | return -EINVAL; /* Unmatched reply. */ | |
3393 | ||
91b60a71 JG |
3394 | work->cm_event.param.apr_rcvd.ap_status = |
3395 | IBA_GET(CM_APR_AR_STATUS, apr_msg); | |
4ca662a3 JG |
3396 | work->cm_event.param.apr_rcvd.apr_info = |
3397 | IBA_GET_MEM_PTR(CM_APR_ADDITIONAL_INFORMATION, apr_msg); | |
91b60a71 JG |
3398 | work->cm_event.param.apr_rcvd.info_len = |
3399 | IBA_GET(CM_APR_ADDITIONAL_INFORMATION_LENGTH, apr_msg); | |
4ca662a3 JG |
3400 | work->cm_event.private_data = |
3401 | IBA_GET_MEM_PTR(CM_APR_PRIVATE_DATA, apr_msg); | |
a977049d | 3402 | |
24be6e81 | 3403 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3404 | if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
3405 | (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && | |
3406 | cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { | |
24be6e81 | 3407 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3408 | goto out; |
3409 | } | |
3410 | cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; | |
70076a41 | 3411 | ib_cancel_mad(cm_id_priv->msg); |
e83f195a | 3412 | cm_queue_work_unlock(cm_id_priv, work); |
a977049d HR |
3413 | return 0; |
3414 | out: | |
3415 | cm_deref_id(cm_id_priv); | |
3416 | return -EINVAL; | |
3417 | } | |
3418 | ||
3419 | static int cm_timewait_handler(struct cm_work *work) | |
3420 | { | |
3421 | struct cm_timewait_info *timewait_info; | |
3422 | struct cm_id_private *cm_id_priv; | |
a977049d | 3423 | |
909624d8 | 3424 | timewait_info = container_of(work, struct cm_timewait_info, work); |
8575329d SH |
3425 | spin_lock_irq(&cm.lock); |
3426 | list_del(&timewait_info->list); | |
3427 | spin_unlock_irq(&cm.lock); | |
a977049d HR |
3428 | |
3429 | cm_id_priv = cm_acquire_id(timewait_info->work.local_id, | |
3430 | timewait_info->work.remote_id); | |
3431 | if (!cm_id_priv) | |
3432 | return -EINVAL; | |
3433 | ||
8575329d | 3434 | spin_lock_irq(&cm_id_priv->lock); |
a977049d HR |
3435 | if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
3436 | cm_id_priv->remote_qpn != timewait_info->remote_qpn) { | |
8575329d | 3437 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3438 | goto out; |
3439 | } | |
3440 | cm_id_priv->id.state = IB_CM_IDLE; | |
e83f195a | 3441 | cm_queue_work_unlock(cm_id_priv, work); |
a977049d HR |
3442 | return 0; |
3443 | out: | |
3444 | cm_deref_id(cm_id_priv); | |
3445 | return -EINVAL; | |
3446 | } | |
3447 | ||
3448 | static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, | |
3449 | struct cm_id_private *cm_id_priv, | |
3450 | struct ib_cm_sidr_req_param *param) | |
3451 | { | |
3452 | cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, | |
87a37ce9 | 3453 | cm_form_tid(cm_id_priv)); |
91b60a71 JG |
3454 | IBA_SET(CM_SIDR_REQ_REQUESTID, sidr_req_msg, |
3455 | be32_to_cpu(cm_id_priv->id.local_id)); | |
3456 | IBA_SET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg, | |
3457 | be16_to_cpu(param->path->pkey)); | |
3458 | IBA_SET(CM_SIDR_REQ_SERVICEID, sidr_req_msg, | |
3459 | be64_to_cpu(param->service_id)); | |
a977049d HR |
3460 | |
3461 | if (param->private_data && param->private_data_len) | |
4ca662a3 JG |
3462 | IBA_SET_MEM(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg, |
3463 | param->private_data, param->private_data_len); | |
a977049d HR |
3464 | } |
3465 | ||
3466 | int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, | |
3467 | struct ib_cm_sidr_req_param *param) | |
3468 | { | |
3469 | struct cm_id_private *cm_id_priv; | |
3470 | struct ib_mad_send_buf *msg; | |
7345201c | 3471 | struct cm_av av = {}; |
a977049d HR |
3472 | unsigned long flags; |
3473 | int ret; | |
3474 | ||
3475 | if (!param->path || (param->private_data && | |
3476 | param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) | |
3477 | return -EINVAL; | |
3478 | ||
3479 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
7345201c | 3480 | ret = cm_init_av_by_path(param->path, param->sgid_attr, &av); |
a977049d | 3481 | if (ret) |
4b4e586e | 3482 | return ret; |
a977049d | 3483 | |
7345201c MZ |
3484 | spin_lock_irqsave(&cm_id_priv->lock, flags); |
3485 | cm_move_av_from_path(&cm_id_priv->av, &av); | |
a977049d | 3486 | cm_id->service_id = param->service_id; |
9c3da099 | 3487 | cm_id->service_mask = ~cpu_to_be64(0); |
a977049d HR |
3488 | cm_id_priv->timeout_ms = param->timeout_ms; |
3489 | cm_id_priv->max_cm_retries = param->max_cm_retries; | |
4b4e586e | 3490 | if (cm_id->state != IB_CM_IDLE) { |
a977049d | 3491 | ret = -EINVAL; |
4b4e586e | 3492 | goto out_unlock; |
8dc105be | 3493 | } |
a977049d | 3494 | |
4b4e586e JG |
3495 | msg = cm_alloc_priv_msg(cm_id_priv); |
3496 | if (IS_ERR(msg)) { | |
3497 | ret = PTR_ERR(msg); | |
3498 | goto out_unlock; | |
a977049d | 3499 | } |
4b4e586e JG |
3500 | |
3501 | cm_format_sidr_req((struct cm_sidr_req_msg *)msg->mad, cm_id_priv, | |
3502 | param); | |
3503 | msg->timeout_ms = cm_id_priv->timeout_ms; | |
3504 | msg->context[1] = (void *)(unsigned long)IB_CM_SIDR_REQ_SENT; | |
3505 | ||
3506 | trace_icm_send_sidr_req(&cm_id_priv->id); | |
3507 | ret = ib_post_send_mad(msg, NULL); | |
3508 | if (ret) | |
3509 | goto out_free; | |
a977049d | 3510 | cm_id->state = IB_CM_SIDR_REQ_SENT; |
a977049d | 3511 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
4b4e586e JG |
3512 | return 0; |
3513 | out_free: | |
3514 | cm_free_priv_msg(msg); | |
3515 | out_unlock: | |
3516 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
3517 | return ret; |
3518 | } | |
3519 | EXPORT_SYMBOL(ib_send_cm_sidr_req); | |
3520 | ||
3521 | static void cm_format_sidr_req_event(struct cm_work *work, | |
cee10433 | 3522 | const struct cm_id_private *rx_cm_id, |
a977049d HR |
3523 | struct ib_cm_id *listen_id) |
3524 | { | |
3525 | struct cm_sidr_req_msg *sidr_req_msg; | |
3526 | struct ib_cm_sidr_req_event_param *param; | |
3527 | ||
3528 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
3529 | work->mad_recv_wc->recv_buf.mad; | |
3530 | param = &work->cm_event.param.sidr_req_rcvd; | |
91b60a71 | 3531 | param->pkey = IBA_GET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg); |
a977049d | 3532 | param->listen_id = listen_id; |
91b60a71 JG |
3533 | param->service_id = |
3534 | cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg)); | |
24cad9a7 | 3535 | param->bth_pkey = cm_get_bth_pkey(work); |
a977049d | 3536 | param->port = work->port->port_num; |
cee10433 | 3537 | param->sgid_attr = rx_cm_id->av.ah_attr.grh.sgid_attr; |
4ca662a3 JG |
3538 | work->cm_event.private_data = |
3539 | IBA_GET_MEM_PTR(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg); | |
a977049d HR |
3540 | } |
3541 | ||
3542 | static int cm_sidr_req_handler(struct cm_work *work) | |
3543 | { | |
083bfdbf | 3544 | struct cm_id_private *cm_id_priv, *listen_cm_id_priv; |
a977049d HR |
3545 | struct cm_sidr_req_msg *sidr_req_msg; |
3546 | struct ib_wc *wc; | |
0c4386ec | 3547 | int ret; |
a977049d | 3548 | |
083bfdbf JG |
3549 | cm_id_priv = |
3550 | cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL); | |
3551 | if (IS_ERR(cm_id_priv)) | |
3552 | return PTR_ERR(cm_id_priv); | |
a977049d HR |
3553 | |
3554 | /* Record SGID/SLID and request ID for lookup. */ | |
3555 | sidr_req_msg = (struct cm_sidr_req_msg *) | |
3556 | work->mad_recv_wc->recv_buf.mad; | |
083bfdbf JG |
3557 | |
3558 | cm_id_priv->id.remote_id = | |
3559 | cpu_to_be32(IBA_GET(CM_SIDR_REQ_REQUESTID, sidr_req_msg)); | |
3560 | cm_id_priv->id.service_id = | |
3561 | cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg)); | |
3562 | cm_id_priv->id.service_mask = ~cpu_to_be64(0); | |
3563 | cm_id_priv->tid = sidr_req_msg->hdr.tid; | |
3564 | ||
a977049d | 3565 | wc = work->mad_recv_wc->wc; |
bf0480a2 | 3566 | cm_id_priv->sidr_slid = wc->slid; |
0c4386ec PP |
3567 | ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
3568 | work->mad_recv_wc->recv_buf.grh, | |
3569 | &cm_id_priv->av); | |
3570 | if (ret) | |
3571 | goto out; | |
3572 | ||
24be6e81 | 3573 | spin_lock_irq(&cm.lock); |
083bfdbf JG |
3574 | listen_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
3575 | if (listen_cm_id_priv) { | |
24be6e81 | 3576 | spin_unlock_irq(&cm.lock); |
526a12c8 JG |
3577 | atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] |
3578 | [CM_SIDR_REQ_COUNTER]); | |
a977049d HR |
3579 | goto out; /* Duplicate message. */ |
3580 | } | |
29c2731c | 3581 | cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
083bfdbf JG |
3582 | listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
3583 | cm_id_priv->id.service_id); | |
3584 | if (!listen_cm_id_priv) { | |
24be6e81 | 3585 | spin_unlock_irq(&cm.lock); |
6a8824a7 JG |
3586 | ib_send_cm_sidr_rep(&cm_id_priv->id, |
3587 | &(struct ib_cm_sidr_rep_param){ | |
3588 | .status = IB_SIDR_UNSUPPORTED }); | |
a977049d HR |
3589 | goto out; /* No match. */ |
3590 | } | |
24be6e81 | 3591 | spin_unlock_irq(&cm.lock); |
a977049d | 3592 | |
083bfdbf JG |
3593 | cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; |
3594 | cm_id_priv->id.context = listen_cm_id_priv->id.context; | |
a977049d | 3595 | |
083bfdbf JG |
3596 | /* |
3597 | * A SIDR ID does not need to be in the xarray since it does not receive | |
3598 | * mads, is not placed in the remote_id or remote_qpn rbtree, and does | |
3599 | * not enter timewait. | |
3600 | */ | |
3601 | ||
3602 | cm_format_sidr_req_event(work, cm_id_priv, &listen_cm_id_priv->id); | |
3603 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); | |
3604 | cm_free_work(work); | |
3605 | /* | |
3606 | * A pointer to the listen_cm_id is held in the event, so this deref | |
3607 | * must be after the event is delivered above. | |
3608 | */ | |
3609 | cm_deref_id(listen_cm_id_priv); | |
3610 | if (ret) | |
3611 | cm_destroy_id(&cm_id_priv->id, ret); | |
a977049d HR |
3612 | return 0; |
3613 | out: | |
3614 | ib_destroy_cm_id(&cm_id_priv->id); | |
3615 | return -EINVAL; | |
3616 | } | |
3617 | ||
3618 | static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, | |
3619 | struct cm_id_private *cm_id_priv, | |
3620 | struct ib_cm_sidr_rep_param *param) | |
3621 | { | |
a20652e1 LR |
3622 | cm_format_mad_ece_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, |
3623 | cm_id_priv->tid, param->ece.attr_mod); | |
91b60a71 JG |
3624 | IBA_SET(CM_SIDR_REP_REQUESTID, sidr_rep_msg, |
3625 | be32_to_cpu(cm_id_priv->id.remote_id)); | |
3626 | IBA_SET(CM_SIDR_REP_STATUS, sidr_rep_msg, param->status); | |
01adb7f4 | 3627 | IBA_SET(CM_SIDR_REP_QPN, sidr_rep_msg, param->qp_num); |
91b60a71 JG |
3628 | IBA_SET(CM_SIDR_REP_SERVICEID, sidr_rep_msg, |
3629 | be64_to_cpu(cm_id_priv->id.service_id)); | |
3630 | IBA_SET(CM_SIDR_REP_Q_KEY, sidr_rep_msg, param->qkey); | |
a20652e1 LR |
3631 | IBA_SET(CM_SIDR_REP_VENDOR_ID_L, sidr_rep_msg, |
3632 | param->ece.vendor_id & 0xFF); | |
3633 | IBA_SET(CM_SIDR_REP_VENDOR_ID_H, sidr_rep_msg, | |
3634 | (param->ece.vendor_id >> 8) & 0xFF); | |
a977049d HR |
3635 | |
3636 | if (param->info && param->info_length) | |
4ca662a3 JG |
3637 | IBA_SET_MEM(CM_SIDR_REP_ADDITIONAL_INFORMATION, sidr_rep_msg, |
3638 | param->info, param->info_length); | |
a977049d HR |
3639 | |
3640 | if (param->private_data && param->private_data_len) | |
4ca662a3 JG |
3641 | IBA_SET_MEM(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg, |
3642 | param->private_data, param->private_data_len); | |
a977049d HR |
3643 | } |
3644 | ||
6a8824a7 JG |
3645 | static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv, |
3646 | struct ib_cm_sidr_rep_param *param) | |
a977049d | 3647 | { |
a977049d | 3648 | struct ib_mad_send_buf *msg; |
221384df | 3649 | unsigned long flags; |
a977049d HR |
3650 | int ret; |
3651 | ||
6a8824a7 JG |
3652 | lockdep_assert_held(&cm_id_priv->lock); |
3653 | ||
a977049d HR |
3654 | if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || |
3655 | (param->private_data && | |
3656 | param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) | |
3657 | return -EINVAL; | |
3658 | ||
6a8824a7 JG |
3659 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_RCVD) |
3660 | return -EINVAL; | |
a977049d | 3661 | |
4b4e586e JG |
3662 | msg = cm_alloc_msg(cm_id_priv); |
3663 | if (IS_ERR(msg)) | |
3664 | return PTR_ERR(msg); | |
a977049d HR |
3665 | |
3666 | cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, | |
3667 | param); | |
8dc105be | 3668 | trace_icm_send_sidr_rep(&cm_id_priv->id); |
34816ad9 | 3669 | ret = ib_post_send_mad(msg, NULL); |
a977049d | 3670 | if (ret) { |
a977049d HR |
3671 | cm_free_msg(msg); |
3672 | return ret; | |
3673 | } | |
6a8824a7 | 3674 | cm_id_priv->id.state = IB_CM_IDLE; |
221384df | 3675 | spin_lock_irqsave(&cm.lock, flags); |
0ca81a28 DT |
3676 | if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) { |
3677 | rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); | |
3678 | RB_CLEAR_NODE(&cm_id_priv->sidr_id_node); | |
3679 | } | |
221384df | 3680 | spin_unlock_irqrestore(&cm.lock, flags); |
a977049d | 3681 | return 0; |
6a8824a7 | 3682 | } |
a977049d | 3683 | |
6a8824a7 JG |
3684 | int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, |
3685 | struct ib_cm_sidr_rep_param *param) | |
3686 | { | |
3687 | struct cm_id_private *cm_id_priv = | |
3688 | container_of(cm_id, struct cm_id_private, id); | |
3689 | unsigned long flags; | |
3690 | int ret; | |
3691 | ||
3692 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3693 | ret = cm_send_sidr_rep_locked(cm_id_priv, param); | |
3694 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
a977049d HR |
3695 | return ret; |
3696 | } | |
3697 | EXPORT_SYMBOL(ib_send_cm_sidr_rep); | |
3698 | ||
815d456e PP |
3699 | static void cm_format_sidr_rep_event(struct cm_work *work, |
3700 | const struct cm_id_private *cm_id_priv) | |
a977049d HR |
3701 | { |
3702 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3703 | struct ib_cm_sidr_rep_event_param *param; | |
3704 | ||
3705 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3706 | work->mad_recv_wc->recv_buf.mad; | |
3707 | param = &work->cm_event.param.sidr_rep_rcvd; | |
91b60a71 JG |
3708 | param->status = IBA_GET(CM_SIDR_REP_STATUS, sidr_rep_msg); |
3709 | param->qkey = IBA_GET(CM_SIDR_REP_Q_KEY, sidr_rep_msg); | |
01adb7f4 | 3710 | param->qpn = IBA_GET(CM_SIDR_REP_QPN, sidr_rep_msg); |
4ca662a3 JG |
3711 | param->info = IBA_GET_MEM_PTR(CM_SIDR_REP_ADDITIONAL_INFORMATION, |
3712 | sidr_rep_msg); | |
91b60a71 JG |
3713 | param->info_len = IBA_GET(CM_SIDR_REP_ADDITIONAL_INFORMATION_LENGTH, |
3714 | sidr_rep_msg); | |
815d456e | 3715 | param->sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr; |
4ca662a3 JG |
3716 | work->cm_event.private_data = |
3717 | IBA_GET_MEM_PTR(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg); | |
a977049d HR |
3718 | } |
3719 | ||
3720 | static int cm_sidr_rep_handler(struct cm_work *work) | |
3721 | { | |
3722 | struct cm_sidr_rep_msg *sidr_rep_msg; | |
3723 | struct cm_id_private *cm_id_priv; | |
a977049d HR |
3724 | |
3725 | sidr_rep_msg = (struct cm_sidr_rep_msg *) | |
3726 | work->mad_recv_wc->recv_buf.mad; | |
91b60a71 JG |
3727 | cm_id_priv = cm_acquire_id( |
3728 | cpu_to_be32(IBA_GET(CM_SIDR_REP_REQUESTID, sidr_rep_msg)), 0); | |
a977049d HR |
3729 | if (!cm_id_priv) |
3730 | return -EINVAL; /* Unmatched reply. */ | |
3731 | ||
24be6e81 | 3732 | spin_lock_irq(&cm_id_priv->lock); |
a977049d | 3733 | if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
24be6e81 | 3734 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3735 | goto out; |
3736 | } | |
3737 | cm_id_priv->id.state = IB_CM_IDLE; | |
70076a41 | 3738 | ib_cancel_mad(cm_id_priv->msg); |
24be6e81 | 3739 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d | 3740 | |
815d456e | 3741 | cm_format_sidr_rep_event(work, cm_id_priv); |
a977049d HR |
3742 | cm_process_work(cm_id_priv, work); |
3743 | return 0; | |
3744 | out: | |
3745 | cm_deref_id(cm_id_priv); | |
3746 | return -EINVAL; | |
3747 | } | |
3748 | ||
c1cf6d9f JG |
3749 | static void cm_process_send_error(struct cm_id_private *cm_id_priv, |
3750 | struct ib_mad_send_buf *msg, | |
3751 | enum ib_cm_state state, | |
a977049d HR |
3752 | enum ib_wc_status wc_status) |
3753 | { | |
c1cf6d9f | 3754 | struct ib_cm_event cm_event = {}; |
a977049d HR |
3755 | int ret; |
3756 | ||
a977049d | 3757 | /* Discard old sends or ones without a response. */ |
24be6e81 | 3758 | spin_lock_irq(&cm_id_priv->lock); |
c1cf6d9f JG |
3759 | if (msg != cm_id_priv->msg) { |
3760 | spin_unlock_irq(&cm_id_priv->lock); | |
3761 | cm_free_msg(msg); | |
3762 | return; | |
3763 | } | |
3764 | cm_free_priv_msg(msg); | |
3765 | ||
3766 | if (state != cm_id_priv->id.state || wc_status == IB_WC_SUCCESS || | |
3767 | wc_status == IB_WC_WR_FLUSH_ERR) | |
3768 | goto out_unlock; | |
a977049d | 3769 | |
75874b3d | 3770 | trace_icm_mad_send_err(state, wc_status); |
a977049d HR |
3771 | switch (state) { |
3772 | case IB_CM_REQ_SENT: | |
3773 | case IB_CM_MRA_REQ_RCVD: | |
3774 | cm_reset_to_idle(cm_id_priv); | |
3775 | cm_event.event = IB_CM_REQ_ERROR; | |
3776 | break; | |
3777 | case IB_CM_REP_SENT: | |
3778 | case IB_CM_MRA_REP_RCVD: | |
3779 | cm_reset_to_idle(cm_id_priv); | |
3780 | cm_event.event = IB_CM_REP_ERROR; | |
3781 | break; | |
3782 | case IB_CM_DREQ_SENT: | |
3783 | cm_enter_timewait(cm_id_priv); | |
3784 | cm_event.event = IB_CM_DREQ_ERROR; | |
3785 | break; | |
3786 | case IB_CM_SIDR_REQ_SENT: | |
3787 | cm_id_priv->id.state = IB_CM_IDLE; | |
3788 | cm_event.event = IB_CM_SIDR_REQ_ERROR; | |
3789 | break; | |
3790 | default: | |
c1cf6d9f | 3791 | goto out_unlock; |
a977049d | 3792 | } |
24be6e81 | 3793 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3794 | cm_event.param.send_status = wc_status; |
3795 | ||
3796 | /* No other events can occur on the cm_id at this point. */ | |
3797 | ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); | |
a977049d HR |
3798 | if (ret) |
3799 | ib_destroy_cm_id(&cm_id_priv->id); | |
3800 | return; | |
c1cf6d9f | 3801 | out_unlock: |
24be6e81 | 3802 | spin_unlock_irq(&cm_id_priv->lock); |
a977049d HR |
3803 | } |
3804 | ||
3805 | static void cm_send_handler(struct ib_mad_agent *mad_agent, | |
3806 | struct ib_mad_send_wc *mad_send_wc) | |
3807 | { | |
34816ad9 | 3808 | struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
c1cf6d9f JG |
3809 | struct cm_id_private *cm_id_priv = msg->context[0]; |
3810 | enum ib_cm_state state = | |
3811 | (enum ib_cm_state)(unsigned long)msg->context[1]; | |
9af57b7a SH |
3812 | struct cm_port *port; |
3813 | u16 attr_index; | |
3814 | ||
3815 | port = mad_agent->context; | |
3816 | attr_index = be16_to_cpu(((struct ib_mad_hdr *) | |
3817 | msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; | |
3818 | ||
3819 | /* | |
3820 | * If the send was in response to a received message (context[0] is not | |
3821 | * set to a cm_id), and is not a REJ, then it is a send that was | |
3822 | * manually retried. | |
3823 | */ | |
c1cf6d9f | 3824 | if (!cm_id_priv && (attr_index != CM_REJ_COUNTER)) |
9af57b7a SH |
3825 | msg->retries = 1; |
3826 | ||
526a12c8 | 3827 | atomic_long_add(1 + msg->retries, &port->counters[CM_XMIT][attr_index]); |
9af57b7a SH |
3828 | if (msg->retries) |
3829 | atomic_long_add(msg->retries, | |
526a12c8 | 3830 | &port->counters[CM_XMIT_RETRIES][attr_index]); |
a977049d | 3831 | |
c1cf6d9f JG |
3832 | if (cm_id_priv) |
3833 | cm_process_send_error(cm_id_priv, msg, state, | |
3834 | mad_send_wc->status); | |
3835 | else | |
3836 | cm_free_response_msg(msg); | |
a977049d HR |
3837 | } |
3838 | ||
c4028958 | 3839 | static void cm_work_handler(struct work_struct *_work) |
a977049d | 3840 | { |
c4028958 | 3841 | struct cm_work *work = container_of(_work, struct cm_work, work.work); |
a977049d HR |
3842 | int ret; |
3843 | ||
3844 | switch (work->cm_event.event) { | |
3845 | case IB_CM_REQ_RECEIVED: | |
3846 | ret = cm_req_handler(work); | |
3847 | break; | |
3848 | case IB_CM_MRA_RECEIVED: | |
3849 | ret = cm_mra_handler(work); | |
3850 | break; | |
3851 | case IB_CM_REJ_RECEIVED: | |
3852 | ret = cm_rej_handler(work); | |
3853 | break; | |
3854 | case IB_CM_REP_RECEIVED: | |
3855 | ret = cm_rep_handler(work); | |
3856 | break; | |
3857 | case IB_CM_RTU_RECEIVED: | |
3858 | ret = cm_rtu_handler(work); | |
3859 | break; | |
3860 | case IB_CM_USER_ESTABLISHED: | |
3861 | ret = cm_establish_handler(work); | |
3862 | break; | |
3863 | case IB_CM_DREQ_RECEIVED: | |
3864 | ret = cm_dreq_handler(work); | |
3865 | break; | |
3866 | case IB_CM_DREP_RECEIVED: | |
3867 | ret = cm_drep_handler(work); | |
3868 | break; | |
3869 | case IB_CM_SIDR_REQ_RECEIVED: | |
3870 | ret = cm_sidr_req_handler(work); | |
3871 | break; | |
3872 | case IB_CM_SIDR_REP_RECEIVED: | |
3873 | ret = cm_sidr_rep_handler(work); | |
3874 | break; | |
3875 | case IB_CM_LAP_RECEIVED: | |
3876 | ret = cm_lap_handler(work); | |
3877 | break; | |
3878 | case IB_CM_APR_RECEIVED: | |
3879 | ret = cm_apr_handler(work); | |
3880 | break; | |
3881 | case IB_CM_TIMEWAIT_EXIT: | |
3882 | ret = cm_timewait_handler(work); | |
3883 | break; | |
3884 | default: | |
75874b3d | 3885 | trace_icm_handler_err(work->cm_event.event); |
a977049d HR |
3886 | ret = -EINVAL; |
3887 | break; | |
3888 | } | |
3889 | if (ret) | |
3890 | cm_free_work(work); | |
3891 | } | |
3892 | ||
e1444b5a | 3893 | static int cm_establish(struct ib_cm_id *cm_id) |
a977049d HR |
3894 | { |
3895 | struct cm_id_private *cm_id_priv; | |
3896 | struct cm_work *work; | |
3897 | unsigned long flags; | |
3898 | int ret = 0; | |
be4b4993 ES |
3899 | struct cm_device *cm_dev; |
3900 | ||
3901 | cm_dev = ib_get_client_data(cm_id->device, &cm_client); | |
3902 | if (!cm_dev) | |
3903 | return -ENODEV; | |
a977049d HR |
3904 | |
3905 | work = kmalloc(sizeof *work, GFP_ATOMIC); | |
3906 | if (!work) | |
3907 | return -ENOMEM; | |
3908 | ||
3909 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3910 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
b6eb7011 | 3911 | switch (cm_id->state) { |
a977049d HR |
3912 | case IB_CM_REP_SENT: |
3913 | case IB_CM_MRA_REP_RCVD: | |
3914 | cm_id->state = IB_CM_ESTABLISHED; | |
3915 | break; | |
3916 | case IB_CM_ESTABLISHED: | |
3917 | ret = -EISCONN; | |
3918 | break; | |
3919 | default: | |
75874b3d | 3920 | trace_icm_establish_err(cm_id); |
a977049d HR |
3921 | ret = -EINVAL; |
3922 | break; | |
3923 | } | |
3924 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3925 | ||
3926 | if (ret) { | |
3927 | kfree(work); | |
3928 | goto out; | |
3929 | } | |
3930 | ||
3931 | /* | |
3932 | * The CM worker thread may try to destroy the cm_id before it | |
3933 | * can execute this work item. To prevent potential deadlock, | |
3934 | * we need to find the cm_id once we're in the context of the | |
3935 | * worker thread, rather than holding a reference on it. | |
3936 | */ | |
c4028958 | 3937 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
3938 | work->local_id = cm_id->local_id; |
3939 | work->remote_id = cm_id->remote_id; | |
3940 | work->mad_recv_wc = NULL; | |
3941 | work->cm_event.event = IB_CM_USER_ESTABLISHED; | |
be4b4993 ES |
3942 | |
3943 | /* Check if the device started its remove_one */ | |
943f44d9 | 3944 | spin_lock_irqsave(&cm.lock, flags); |
be4b4993 ES |
3945 | if (!cm_dev->going_down) { |
3946 | queue_delayed_work(cm.wq, &work->work, 0); | |
3947 | } else { | |
3948 | kfree(work); | |
3949 | ret = -ENODEV; | |
3950 | } | |
943f44d9 | 3951 | spin_unlock_irqrestore(&cm.lock, flags); |
be4b4993 | 3952 | |
a977049d HR |
3953 | out: |
3954 | return ret; | |
3955 | } | |
e1444b5a SH |
3956 | |
3957 | static int cm_migrate(struct ib_cm_id *cm_id) | |
3958 | { | |
3959 | struct cm_id_private *cm_id_priv; | |
3960 | unsigned long flags; | |
3961 | int ret = 0; | |
3962 | ||
3963 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
3964 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
3965 | if (cm_id->state == IB_CM_ESTABLISHED && | |
3966 | (cm_id->lap_state == IB_CM_LAP_UNINIT || | |
3967 | cm_id->lap_state == IB_CM_LAP_IDLE)) { | |
3968 | cm_id->lap_state = IB_CM_LAP_IDLE; | |
3969 | cm_id_priv->av = cm_id_priv->alt_av; | |
3970 | } else | |
3971 | ret = -EINVAL; | |
3972 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
3973 | ||
3974 | return ret; | |
3975 | } | |
3976 | ||
3977 | int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) | |
3978 | { | |
3979 | int ret; | |
3980 | ||
3981 | switch (event) { | |
3982 | case IB_EVENT_COMM_EST: | |
3983 | ret = cm_establish(cm_id); | |
3984 | break; | |
3985 | case IB_EVENT_PATH_MIG: | |
3986 | ret = cm_migrate(cm_id); | |
3987 | break; | |
3988 | default: | |
3989 | ret = -EINVAL; | |
3990 | } | |
3991 | return ret; | |
3992 | } | |
3993 | EXPORT_SYMBOL(ib_cm_notify); | |
a977049d HR |
3994 | |
3995 | static void cm_recv_handler(struct ib_mad_agent *mad_agent, | |
ca281265 | 3996 | struct ib_mad_send_buf *send_buf, |
a977049d HR |
3997 | struct ib_mad_recv_wc *mad_recv_wc) |
3998 | { | |
9af57b7a | 3999 | struct cm_port *port = mad_agent->context; |
a977049d HR |
4000 | struct cm_work *work; |
4001 | enum ib_cm_event_type event; | |
5a3dc323 | 4002 | bool alt_path = false; |
9af57b7a | 4003 | u16 attr_id; |
a977049d | 4004 | int paths = 0; |
be4b4993 | 4005 | int going_down = 0; |
a977049d HR |
4006 | |
4007 | switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { | |
4008 | case CM_REQ_ATTR_ID: | |
5a3dc323 PP |
4009 | alt_path = cm_req_has_alt_path((struct cm_req_msg *) |
4010 | mad_recv_wc->recv_buf.mad); | |
4011 | paths = 1 + (alt_path != 0); | |
a977049d HR |
4012 | event = IB_CM_REQ_RECEIVED; |
4013 | break; | |
4014 | case CM_MRA_ATTR_ID: | |
4015 | event = IB_CM_MRA_RECEIVED; | |
4016 | break; | |
4017 | case CM_REJ_ATTR_ID: | |
4018 | event = IB_CM_REJ_RECEIVED; | |
4019 | break; | |
4020 | case CM_REP_ATTR_ID: | |
4021 | event = IB_CM_REP_RECEIVED; | |
4022 | break; | |
4023 | case CM_RTU_ATTR_ID: | |
4024 | event = IB_CM_RTU_RECEIVED; | |
4025 | break; | |
4026 | case CM_DREQ_ATTR_ID: | |
4027 | event = IB_CM_DREQ_RECEIVED; | |
4028 | break; | |
4029 | case CM_DREP_ATTR_ID: | |
4030 | event = IB_CM_DREP_RECEIVED; | |
4031 | break; | |
4032 | case CM_SIDR_REQ_ATTR_ID: | |
4033 | event = IB_CM_SIDR_REQ_RECEIVED; | |
4034 | break; | |
4035 | case CM_SIDR_REP_ATTR_ID: | |
4036 | event = IB_CM_SIDR_REP_RECEIVED; | |
4037 | break; | |
4038 | case CM_LAP_ATTR_ID: | |
4039 | paths = 1; | |
4040 | event = IB_CM_LAP_RECEIVED; | |
4041 | break; | |
4042 | case CM_APR_ATTR_ID: | |
4043 | event = IB_CM_APR_RECEIVED; | |
4044 | break; | |
4045 | default: | |
4046 | ib_free_recv_mad(mad_recv_wc); | |
4047 | return; | |
4048 | } | |
4049 | ||
9af57b7a | 4050 | attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); |
526a12c8 | 4051 | atomic_long_inc(&port->counters[CM_RECV][attr_id - CM_ATTR_ID_OFFSET]); |
9af57b7a | 4052 | |
b5c61b96 | 4053 | work = kmalloc(struct_size(work, path, paths), GFP_KERNEL); |
a977049d HR |
4054 | if (!work) { |
4055 | ib_free_recv_mad(mad_recv_wc); | |
4056 | return; | |
4057 | } | |
4058 | ||
c4028958 | 4059 | INIT_DELAYED_WORK(&work->work, cm_work_handler); |
a977049d HR |
4060 | work->cm_event.event = event; |
4061 | work->mad_recv_wc = mad_recv_wc; | |
9af57b7a | 4062 | work->port = port; |
be4b4993 ES |
4063 | |
4064 | /* Check if the device started its remove_one */ | |
4065 | spin_lock_irq(&cm.lock); | |
4066 | if (!port->cm_dev->going_down) | |
4067 | queue_delayed_work(cm.wq, &work->work, 0); | |
4068 | else | |
4069 | going_down = 1; | |
4070 | spin_unlock_irq(&cm.lock); | |
4071 | ||
4072 | if (going_down) { | |
4073 | kfree(work); | |
4074 | ib_free_recv_mad(mad_recv_wc); | |
4075 | } | |
a977049d HR |
4076 | } |
4077 | ||
4078 | static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, | |
4079 | struct ib_qp_attr *qp_attr, | |
4080 | int *qp_attr_mask) | |
4081 | { | |
4082 | unsigned long flags; | |
4083 | int ret; | |
4084 | ||
4085 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
4086 | switch (cm_id_priv->id.state) { | |
4087 | case IB_CM_REQ_SENT: | |
4088 | case IB_CM_MRA_REQ_RCVD: | |
4089 | case IB_CM_REQ_RCVD: | |
4090 | case IB_CM_MRA_REQ_SENT: | |
4091 | case IB_CM_REP_RCVD: | |
4092 | case IB_CM_MRA_REP_SENT: | |
4093 | case IB_CM_REP_SENT: | |
4094 | case IB_CM_MRA_REP_RCVD: | |
4095 | case IB_CM_ESTABLISHED: | |
4096 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
4097 | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
e31353ea | 4098 | qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
a977049d | 4099 | if (cm_id_priv->responder_resources) |
c1f250c0 SH |
4100 | qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
4101 | IB_ACCESS_REMOTE_ATOMIC; | |
a977049d | 4102 | qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
76039ac9 MZ |
4103 | if (cm_id_priv->av.port) |
4104 | qp_attr->port_num = cm_id_priv->av.port->port_num; | |
a977049d HR |
4105 | ret = 0; |
4106 | break; | |
4107 | default: | |
75874b3d | 4108 | trace_icm_qp_init_err(&cm_id_priv->id); |
a977049d HR |
4109 | ret = -EINVAL; |
4110 | break; | |
4111 | } | |
4112 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
4113 | return ret; | |
4114 | } | |
4115 | ||
4116 | static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, | |
4117 | struct ib_qp_attr *qp_attr, | |
4118 | int *qp_attr_mask) | |
4119 | { | |
4120 | unsigned long flags; | |
4121 | int ret; | |
4122 | ||
4123 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
4124 | switch (cm_id_priv->id.state) { | |
4125 | case IB_CM_REQ_RCVD: | |
4126 | case IB_CM_MRA_REQ_SENT: | |
4127 | case IB_CM_REP_RCVD: | |
4128 | case IB_CM_MRA_REP_SENT: | |
4129 | case IB_CM_REP_SENT: | |
4130 | case IB_CM_MRA_REP_RCVD: | |
4131 | case IB_CM_ESTABLISHED: | |
4132 | *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | | |
ae7971a7 | 4133 | IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
a977049d HR |
4134 | qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
4135 | qp_attr->path_mtu = cm_id_priv->path_mtu; | |
4136 | qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); | |
4137 | qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); | |
d26a360b SH |
4138 | if (cm_id_priv->qp_type == IB_QPT_RC || |
4139 | cm_id_priv->qp_type == IB_QPT_XRC_TGT) { | |
ae7971a7 SH |
4140 | *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | |
4141 | IB_QP_MIN_RNR_TIMER; | |
4142 | qp_attr->max_dest_rd_atomic = | |
4143 | cm_id_priv->responder_resources; | |
4144 | qp_attr->min_rnr_timer = 0; | |
4145 | } | |
76039ac9 MZ |
4146 | if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr) && |
4147 | cm_id_priv->alt_av.port) { | |
a977049d | 4148 | *qp_attr_mask |= IB_QP_ALT_PATH; |
0d8fdfd7 | 4149 | qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
e1444b5a | 4150 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 4151 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
a977049d HR |
4152 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
4153 | } | |
4154 | ret = 0; | |
4155 | break; | |
4156 | default: | |
75874b3d | 4157 | trace_icm_qp_rtr_err(&cm_id_priv->id); |
a977049d HR |
4158 | ret = -EINVAL; |
4159 | break; | |
4160 | } | |
4161 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
4162 | return ret; | |
4163 | } | |
4164 | ||
4165 | static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, | |
4166 | struct ib_qp_attr *qp_attr, | |
4167 | int *qp_attr_mask) | |
4168 | { | |
4169 | unsigned long flags; | |
4170 | int ret; | |
4171 | ||
4172 | spin_lock_irqsave(&cm_id_priv->lock, flags); | |
4173 | switch (cm_id_priv->id.state) { | |
0fe313b0 SH |
4174 | /* Allow transition to RTS before sending REP */ |
4175 | case IB_CM_REQ_RCVD: | |
4176 | case IB_CM_MRA_REQ_SENT: | |
4177 | ||
a977049d HR |
4178 | case IB_CM_REP_RCVD: |
4179 | case IB_CM_MRA_REP_SENT: | |
4180 | case IB_CM_REP_SENT: | |
4181 | case IB_CM_MRA_REP_RCVD: | |
4182 | case IB_CM_ESTABLISHED: | |
e1444b5a SH |
4183 | if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
4184 | *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; | |
4185 | qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); | |
d26a360b SH |
4186 | switch (cm_id_priv->qp_type) { |
4187 | case IB_QPT_RC: | |
4188 | case IB_QPT_XRC_INI: | |
4189 | *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY | | |
e1444b5a | 4190 | IB_QP_MAX_QP_RD_ATOMIC; |
e1444b5a SH |
4191 | qp_attr->retry_cnt = cm_id_priv->retry_count; |
4192 | qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; | |
d26a360b | 4193 | qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; |
df561f66 | 4194 | fallthrough; |
d26a360b SH |
4195 | case IB_QPT_XRC_TGT: |
4196 | *qp_attr_mask |= IB_QP_TIMEOUT; | |
4197 | qp_attr->timeout = cm_id_priv->av.timeout; | |
4198 | break; | |
4199 | default: | |
4200 | break; | |
e1444b5a | 4201 | } |
d8966fcd | 4202 | if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr)) { |
e1444b5a SH |
4203 | *qp_attr_mask |= IB_QP_PATH_MIG_STATE; |
4204 | qp_attr->path_mig_state = IB_MIG_REARM; | |
4205 | } | |
4206 | } else { | |
4207 | *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; | |
76039ac9 MZ |
4208 | if (cm_id_priv->alt_av.port) |
4209 | qp_attr->alt_port_num = | |
4210 | cm_id_priv->alt_av.port->port_num; | |
e1444b5a | 4211 | qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
1d846126 | 4212 | qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
e1444b5a | 4213 | qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
a977049d HR |
4214 | qp_attr->path_mig_state = IB_MIG_REARM; |
4215 | } | |
4216 | ret = 0; | |
4217 | break; | |
4218 | default: | |
75874b3d | 4219 | trace_icm_qp_rts_err(&cm_id_priv->id); |
a977049d HR |
4220 | ret = -EINVAL; |
4221 | break; | |
4222 | } | |
4223 | spin_unlock_irqrestore(&cm_id_priv->lock, flags); | |
4224 | return ret; | |
4225 | } | |
4226 | ||
4227 | int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, | |
4228 | struct ib_qp_attr *qp_attr, | |
4229 | int *qp_attr_mask) | |
4230 | { | |
4231 | struct cm_id_private *cm_id_priv; | |
4232 | int ret; | |
4233 | ||
4234 | cm_id_priv = container_of(cm_id, struct cm_id_private, id); | |
4235 | switch (qp_attr->qp_state) { | |
4236 | case IB_QPS_INIT: | |
4237 | ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
4238 | break; | |
4239 | case IB_QPS_RTR: | |
4240 | ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
4241 | break; | |
4242 | case IB_QPS_RTS: | |
4243 | ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); | |
4244 | break; | |
4245 | default: | |
4246 | ret = -EINVAL; | |
4247 | break; | |
4248 | } | |
4249 | return ret; | |
4250 | } | |
4251 | EXPORT_SYMBOL(ib_cm_init_qp_attr); | |
4252 | ||
526a12c8 JG |
4253 | static ssize_t cm_show_counter(struct ib_device *ibdev, u32 port_num, |
4254 | struct ib_port_attribute *attr, char *buf) | |
9af57b7a | 4255 | { |
526a12c8 JG |
4256 | struct cm_counter_attribute *cm_attr = |
4257 | container_of(attr, struct cm_counter_attribute, attr); | |
4258 | struct cm_device *cm_dev = ib_get_client_data(ibdev, &cm_client); | |
9af57b7a | 4259 | |
526a12c8 JG |
4260 | if (WARN_ON(!cm_dev)) |
4261 | return -EINVAL; | |
9af57b7a | 4262 | |
526a12c8 JG |
4263 | return sysfs_emit( |
4264 | buf, "%ld\n", | |
4265 | atomic_long_read( | |
4266 | &cm_dev->port[port_num - 1] | |
4267 | ->counters[cm_attr->group][cm_attr->index])); | |
9af57b7a SH |
4268 | } |
4269 | ||
526a12c8 JG |
4270 | #define CM_COUNTER_ATTR(_name, _group, _index) \ |
4271 | { \ | |
4272 | .attr = __ATTR(_name, 0444, cm_show_counter, NULL), \ | |
4273 | .group = _group, .index = _index \ | |
9af57b7a SH |
4274 | } |
4275 | ||
526a12c8 JG |
4276 | #define CM_COUNTER_GROUP(_group, _name) \ |
4277 | static struct cm_counter_attribute cm_counter_attr_##_group[] = { \ | |
4278 | CM_COUNTER_ATTR(req, _group, CM_REQ_COUNTER), \ | |
4279 | CM_COUNTER_ATTR(mra, _group, CM_MRA_COUNTER), \ | |
4280 | CM_COUNTER_ATTR(rej, _group, CM_REJ_COUNTER), \ | |
4281 | CM_COUNTER_ATTR(rep, _group, CM_REP_COUNTER), \ | |
4282 | CM_COUNTER_ATTR(rtu, _group, CM_RTU_COUNTER), \ | |
4283 | CM_COUNTER_ATTR(dreq, _group, CM_DREQ_COUNTER), \ | |
4284 | CM_COUNTER_ATTR(drep, _group, CM_DREP_COUNTER), \ | |
4285 | CM_COUNTER_ATTR(sidr_req, _group, CM_SIDR_REQ_COUNTER), \ | |
4286 | CM_COUNTER_ATTR(sidr_rep, _group, CM_SIDR_REP_COUNTER), \ | |
4287 | CM_COUNTER_ATTR(lap, _group, CM_LAP_COUNTER), \ | |
4288 | CM_COUNTER_ATTR(apr, _group, CM_APR_COUNTER), \ | |
4289 | }; \ | |
4290 | static struct attribute *cm_counter_attrs_##_group[] = { \ | |
4291 | &cm_counter_attr_##_group[0].attr.attr, \ | |
4292 | &cm_counter_attr_##_group[1].attr.attr, \ | |
4293 | &cm_counter_attr_##_group[2].attr.attr, \ | |
4294 | &cm_counter_attr_##_group[3].attr.attr, \ | |
4295 | &cm_counter_attr_##_group[4].attr.attr, \ | |
4296 | &cm_counter_attr_##_group[5].attr.attr, \ | |
4297 | &cm_counter_attr_##_group[6].attr.attr, \ | |
4298 | &cm_counter_attr_##_group[7].attr.attr, \ | |
4299 | &cm_counter_attr_##_group[8].attr.attr, \ | |
4300 | &cm_counter_attr_##_group[9].attr.attr, \ | |
4301 | &cm_counter_attr_##_group[10].attr.attr, \ | |
4302 | NULL, \ | |
4303 | }; \ | |
4304 | static const struct attribute_group cm_counter_group_##_group = { \ | |
4305 | .name = _name, \ | |
4306 | .attrs = cm_counter_attrs_##_group, \ | |
4307 | }; | |
9af57b7a | 4308 | |
526a12c8 JG |
4309 | CM_COUNTER_GROUP(CM_XMIT, "cm_tx_msgs") |
4310 | CM_COUNTER_GROUP(CM_XMIT_RETRIES, "cm_tx_retries") | |
4311 | CM_COUNTER_GROUP(CM_RECV, "cm_rx_msgs") | |
4312 | CM_COUNTER_GROUP(CM_RECV_DUPLICATES, "cm_rx_duplicates") | |
4313 | ||
4314 | static const struct attribute_group *cm_counter_groups[] = { | |
4315 | &cm_counter_group_CM_XMIT, | |
4316 | &cm_counter_group_CM_XMIT_RETRIES, | |
4317 | &cm_counter_group_CM_RECV, | |
4318 | &cm_counter_group_CM_RECV_DUPLICATES, | |
4319 | NULL, | |
4320 | }; | |
9af57b7a | 4321 | |
11a0ae4c | 4322 | static int cm_add_one(struct ib_device *ib_device) |
a977049d HR |
4323 | { |
4324 | struct cm_device *cm_dev; | |
4325 | struct cm_port *port; | |
4326 | struct ib_mad_reg_req reg_req = { | |
4327 | .mgmt_class = IB_MGMT_CLASS_CM, | |
0f29b46d | 4328 | .mgmt_class_version = IB_CM_CLASS_VERSION, |
a977049d HR |
4329 | }; |
4330 | struct ib_port_modify port_modify = { | |
4331 | .set_port_cap_mask = IB_PORT_CM_SUP | |
4332 | }; | |
4333 | unsigned long flags; | |
4334 | int ret; | |
091e6a4c | 4335 | int count = 0; |
1fb7f897 | 4336 | u32 i; |
a977049d | 4337 | |
acafe7e3 KC |
4338 | cm_dev = kzalloc(struct_size(cm_dev, port, ib_device->phys_port_cnt), |
4339 | GFP_KERNEL); | |
a977049d | 4340 | if (!cm_dev) |
11a0ae4c | 4341 | return -ENOMEM; |
a977049d | 4342 | |
76039ac9 MZ |
4343 | kref_init(&cm_dev->kref); |
4344 | spin_lock_init(&cm_dev->mad_agent_lock); | |
d4c4196f | 4345 | cm_dev->ib_device = ib_device; |
86bee4c9 | 4346 | cm_dev->ack_delay = ib_device->attrs.local_ca_ack_delay; |
be4b4993 | 4347 | cm_dev->going_down = 0; |
9af57b7a | 4348 | |
526a12c8 JG |
4349 | ib_set_client_data(ib_device, &cm_client, cm_dev); |
4350 | ||
a977049d | 4351 | set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
131be267 | 4352 | rdma_for_each_port (ib_device, i) { |
72219cea | 4353 | if (!rdma_cap_ib_cm(ib_device, i)) |
091e6a4c MW |
4354 | continue; |
4355 | ||
9af57b7a | 4356 | port = kzalloc(sizeof *port, GFP_KERNEL); |
11a0ae4c JG |
4357 | if (!port) { |
4358 | ret = -ENOMEM; | |
9af57b7a | 4359 | goto error1; |
11a0ae4c | 4360 | } |
9af57b7a SH |
4361 | |
4362 | cm_dev->port[i-1] = port; | |
a977049d HR |
4363 | port->cm_dev = cm_dev; |
4364 | port->port_num = i; | |
9af57b7a | 4365 | |
526a12c8 JG |
4366 | ret = ib_port_register_client_groups(ib_device, i, |
4367 | cm_counter_groups); | |
9af57b7a SH |
4368 | if (ret) |
4369 | goto error1; | |
4370 | ||
d4c4196f | 4371 | port->mad_agent = ib_register_mad_agent(ib_device, i, |
a977049d HR |
4372 | IB_QPT_GSI, |
4373 | ®_req, | |
4374 | 0, | |
4375 | cm_send_handler, | |
4376 | cm_recv_handler, | |
0f29b46d IW |
4377 | port, |
4378 | 0); | |
11a0ae4c JG |
4379 | if (IS_ERR(port->mad_agent)) { |
4380 | ret = PTR_ERR(port->mad_agent); | |
9af57b7a | 4381 | goto error2; |
11a0ae4c | 4382 | } |
a977049d | 4383 | |
d4c4196f | 4384 | ret = ib_modify_port(ib_device, i, 0, &port_modify); |
a977049d | 4385 | if (ret) |
9af57b7a | 4386 | goto error3; |
091e6a4c MW |
4387 | |
4388 | count++; | |
a977049d | 4389 | } |
091e6a4c | 4390 | |
11a0ae4c JG |
4391 | if (!count) { |
4392 | ret = -EOPNOTSUPP; | |
091e6a4c | 4393 | goto free; |
11a0ae4c | 4394 | } |
091e6a4c | 4395 | |
a977049d HR |
4396 | write_lock_irqsave(&cm.device_lock, flags); |
4397 | list_add_tail(&cm_dev->list, &cm.device_list); | |
4398 | write_unlock_irqrestore(&cm.device_lock, flags); | |
11a0ae4c | 4399 | return 0; |
a977049d | 4400 | |
9af57b7a | 4401 | error3: |
cf311cd4 | 4402 | ib_unregister_mad_agent(port->mad_agent); |
9af57b7a | 4403 | error2: |
526a12c8 | 4404 | ib_port_unregister_client_groups(ib_device, i, cm_counter_groups); |
cf311cd4 | 4405 | error1: |
a977049d HR |
4406 | port_modify.set_port_cap_mask = 0; |
4407 | port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; | |
4408 | while (--i) { | |
72219cea | 4409 | if (!rdma_cap_ib_cm(ib_device, i)) |
091e6a4c MW |
4410 | continue; |
4411 | ||
9af57b7a | 4412 | port = cm_dev->port[i-1]; |
d4c4196f | 4413 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
a977049d | 4414 | ib_unregister_mad_agent(port->mad_agent); |
526a12c8 JG |
4415 | ib_port_unregister_client_groups(ib_device, i, |
4416 | cm_counter_groups); | |
a977049d | 4417 | } |
091e6a4c | 4418 | free: |
76039ac9 | 4419 | cm_device_put(cm_dev); |
11a0ae4c | 4420 | return ret; |
a977049d HR |
4421 | } |
4422 | ||
7c1eb45a | 4423 | static void cm_remove_one(struct ib_device *ib_device, void *client_data) |
a977049d | 4424 | { |
7c1eb45a | 4425 | struct cm_device *cm_dev = client_data; |
a977049d HR |
4426 | struct cm_port *port; |
4427 | struct ib_port_modify port_modify = { | |
4428 | .clr_port_cap_mask = IB_PORT_CM_SUP | |
4429 | }; | |
4430 | unsigned long flags; | |
1fb7f897 | 4431 | u32 i; |
a977049d | 4432 | |
a977049d HR |
4433 | write_lock_irqsave(&cm.device_lock, flags); |
4434 | list_del(&cm_dev->list); | |
4435 | write_unlock_irqrestore(&cm.device_lock, flags); | |
4436 | ||
be4b4993 ES |
4437 | spin_lock_irq(&cm.lock); |
4438 | cm_dev->going_down = 1; | |
4439 | spin_unlock_irq(&cm.lock); | |
4440 | ||
131be267 | 4441 | rdma_for_each_port (ib_device, i) { |
76039ac9 MZ |
4442 | struct ib_mad_agent *mad_agent; |
4443 | ||
72219cea | 4444 | if (!rdma_cap_ib_cm(ib_device, i)) |
091e6a4c MW |
4445 | continue; |
4446 | ||
9af57b7a | 4447 | port = cm_dev->port[i-1]; |
76039ac9 | 4448 | mad_agent = port->mad_agent; |
d4c4196f | 4449 | ib_modify_port(ib_device, port->port_num, 0, &port_modify); |
be4b4993 ES |
4450 | /* |
4451 | * We flush the queue here after the going_down set, this | |
4452 | * verify that no new works will be queued in the recv handler, | |
4453 | * after that we can call the unregister_mad_agent | |
4454 | */ | |
84ba284c | 4455 | flush_workqueue(cm.wq); |
76039ac9 MZ |
4456 | /* |
4457 | * The above ensures no call paths from the work are running, | |
4458 | * the remaining paths all take the mad_agent_lock. | |
4459 | */ | |
4460 | spin_lock(&cm_dev->mad_agent_lock); | |
4461 | port->mad_agent = NULL; | |
4462 | spin_unlock(&cm_dev->mad_agent_lock); | |
4463 | ib_unregister_mad_agent(mad_agent); | |
526a12c8 JG |
4464 | ib_port_unregister_client_groups(ib_device, i, |
4465 | cm_counter_groups); | |
a977049d | 4466 | } |
9db0ff53 | 4467 | |
76039ac9 | 4468 | cm_device_put(cm_dev); |
a977049d HR |
4469 | } |
4470 | ||
4471 | static int __init ib_cm_init(void) | |
4472 | { | |
4473 | int ret; | |
4474 | ||
a977049d HR |
4475 | INIT_LIST_HEAD(&cm.device_list); |
4476 | rwlock_init(&cm.device_lock); | |
4477 | spin_lock_init(&cm.lock); | |
4478 | cm.listen_service_table = RB_ROOT; | |
9c3da099 | 4479 | cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); |
a977049d HR |
4480 | cm.remote_id_table = RB_ROOT; |
4481 | cm.remote_qp_table = RB_ROOT; | |
4482 | cm.remote_sidr_table = RB_ROOT; | |
eb73060b | 4483 | xa_init_flags(&cm.local_id_table, XA_FLAGS_ALLOC); |
f06d2653 | 4484 | get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
8575329d | 4485 | INIT_LIST_HEAD(&cm.timewait_list); |
a977049d | 4486 | |
cb93e597 | 4487 | cm.wq = alloc_workqueue("ib_cm", 0, 1); |
9af57b7a SH |
4488 | if (!cm.wq) { |
4489 | ret = -ENOMEM; | |
87d4abda | 4490 | goto error2; |
9af57b7a SH |
4491 | } |
4492 | ||
a977049d HR |
4493 | ret = ib_register_client(&cm_client); |
4494 | if (ret) | |
87d4abda | 4495 | goto error3; |
a977049d HR |
4496 | |
4497 | return 0; | |
87d4abda | 4498 | error3: |
a977049d | 4499 | destroy_workqueue(cm.wq); |
87d4abda | 4500 | error2: |
a977049d HR |
4501 | return ret; |
4502 | } | |
4503 | ||
4504 | static void __exit ib_cm_cleanup(void) | |
4505 | { | |
8575329d SH |
4506 | struct cm_timewait_info *timewait_info, *tmp; |
4507 | ||
4508 | spin_lock_irq(&cm.lock); | |
4509 | list_for_each_entry(timewait_info, &cm.timewait_list, list) | |
4510 | cancel_delayed_work(&timewait_info->work.work); | |
4511 | spin_unlock_irq(&cm.lock); | |
4512 | ||
84ba284c | 4513 | ib_unregister_client(&cm_client); |
a977049d | 4514 | destroy_workqueue(cm.wq); |
8575329d SH |
4515 | |
4516 | list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { | |
4517 | list_del(&timewait_info->list); | |
4518 | kfree(timewait_info); | |
4519 | } | |
4520 | ||
ae78ff3a | 4521 | WARN_ON(!xa_empty(&cm.local_id_table)); |
a977049d HR |
4522 | } |
4523 | ||
4524 | module_init(ib_cm_init); | |
4525 | module_exit(ib_cm_cleanup); |