1 /* 2 * Copyright (c) 2004-2006 Intel Corporation. All rights reserved. 3 * Copyright (c) 2004 Topspin Corporation. All rights reserved. 4 * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. 5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 * 35 * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $ 36 */ 37 38 #include <linux/completion.h> 39 #include <linux/dma-mapping.h> 40 #include <linux/err.h> 41 #include <linux/idr.h> 42 #include <linux/interrupt.h> 43 #include <linux/pci.h> 44 #include <linux/random.h> 45 #include <linux/rbtree.h> 46 #include <linux/spinlock.h> 47 #include <linux/workqueue.h> 48 49 #include <rdma/ib_cache.h> 50 #include <rdma/ib_cm.h> 51 #include "cm_msgs.h" 52 53 MODULE_AUTHOR("Sean Hefty"); 54 MODULE_DESCRIPTION("InfiniBand CM"); 55 MODULE_LICENSE("Dual BSD/GPL"); 56 57 static void cm_add_one(struct ib_device *device); 58 static void cm_remove_one(struct ib_device *device); 59 60 static struct ib_client cm_client = { 61 .name = "cm", 62 .add = cm_add_one, 63 .remove = cm_remove_one 64 }; 65 66 static struct ib_cm { 67 spinlock_t lock; 68 struct list_head device_list; 69 rwlock_t device_lock; 70 struct rb_root listen_service_table; 71 u64 listen_service_id; 72 /* struct rb_root peer_service_table; todo: fix peer to peer */ 73 struct rb_root remote_qp_table; 74 struct rb_root remote_id_table; 75 struct rb_root remote_sidr_table; 76 struct idr local_id_table; 77 __be32 random_id_operand; 78 struct list_head timewait_list; 79 struct workqueue_struct *wq; 80 } cm; 81 82 struct cm_port { 83 struct cm_device *cm_dev; 84 struct ib_mad_agent *mad_agent; 85 u8 port_num; 86 }; 87 88 struct cm_device { 89 struct list_head list; 90 struct ib_device *device; 91 struct cm_port port[0]; 92 }; 93 94 struct cm_av { 95 struct cm_port *port; 96 union ib_gid dgid; 97 struct ib_ah_attr ah_attr; 98 u16 pkey_index; 99 u8 packet_life_time; 100 }; 101 102 struct cm_work { 103 struct delayed_work work; 104 struct list_head list; 105 struct cm_port *port; 106 struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ 107 __be32 local_id; /* Established / timewait */ 108 __be32 remote_id; 109 struct ib_cm_event cm_event; 110 struct ib_sa_path_rec path[0]; 111 }; 112 113 struct cm_timewait_info { 114 struct cm_work work; /* Must be first. */ 115 struct list_head list; 116 struct rb_node remote_qp_node; 117 struct rb_node remote_id_node; 118 __be64 remote_ca_guid; 119 __be32 remote_qpn; 120 u8 inserted_remote_qp; 121 u8 inserted_remote_id; 122 }; 123 124 struct cm_id_private { 125 struct ib_cm_id id; 126 127 struct rb_node service_node; 128 struct rb_node sidr_id_node; 129 spinlock_t lock; /* Do not acquire inside cm.lock */ 130 struct completion comp; 131 atomic_t refcount; 132 133 struct ib_mad_send_buf *msg; 134 struct cm_timewait_info *timewait_info; 135 /* todo: use alternate port on send failure */ 136 struct cm_av av; 137 struct cm_av alt_av; 138 struct ib_cm_compare_data *compare_data; 139 140 void *private_data; 141 __be64 tid; 142 __be32 local_qpn; 143 __be32 remote_qpn; 144 enum ib_qp_type qp_type; 145 __be32 sq_psn; 146 __be32 rq_psn; 147 int timeout_ms; 148 enum ib_mtu path_mtu; 149 __be16 pkey; 150 u8 private_data_len; 151 u8 max_cm_retries; 152 u8 peer_to_peer; 153 u8 responder_resources; 154 u8 initiator_depth; 155 u8 retry_count; 156 u8 rnr_retry_count; 157 u8 service_timeout; 158 159 struct list_head work_list; 160 atomic_t work_count; 161 }; 162 163 static void cm_work_handler(struct work_struct *work); 164 165 static inline void cm_deref_id(struct cm_id_private *cm_id_priv) 166 { 167 if (atomic_dec_and_test(&cm_id_priv->refcount)) 168 complete(&cm_id_priv->comp); 169 } 170 171 static int cm_alloc_msg(struct cm_id_private *cm_id_priv, 172 struct ib_mad_send_buf **msg) 173 { 174 struct ib_mad_agent *mad_agent; 175 struct ib_mad_send_buf *m; 176 struct ib_ah *ah; 177 178 mad_agent = cm_id_priv->av.port->mad_agent; 179 ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); 180 if (IS_ERR(ah)) 181 return PTR_ERR(ah); 182 183 m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, 184 cm_id_priv->av.pkey_index, 185 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, 186 GFP_ATOMIC); 187 if (IS_ERR(m)) { 188 ib_destroy_ah(ah); 189 return PTR_ERR(m); 190 } 191 192 /* Timeout set by caller if response is expected. */ 193 m->ah = ah; 194 m->retries = cm_id_priv->max_cm_retries; 195 196 atomic_inc(&cm_id_priv->refcount); 197 m->context[0] = cm_id_priv; 198 *msg = m; 199 return 0; 200 } 201 202 static int cm_alloc_response_msg(struct cm_port *port, 203 struct ib_mad_recv_wc *mad_recv_wc, 204 struct ib_mad_send_buf **msg) 205 { 206 struct ib_mad_send_buf *m; 207 struct ib_ah *ah; 208 209 ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, 210 mad_recv_wc->recv_buf.grh, port->port_num); 211 if (IS_ERR(ah)) 212 return PTR_ERR(ah); 213 214 m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, 215 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, 216 GFP_ATOMIC); 217 if (IS_ERR(m)) { 218 ib_destroy_ah(ah); 219 return PTR_ERR(m); 220 } 221 m->ah = ah; 222 *msg = m; 223 return 0; 224 } 225 226 static void cm_free_msg(struct ib_mad_send_buf *msg) 227 { 228 ib_destroy_ah(msg->ah); 229 if (msg->context[0]) 230 cm_deref_id(msg->context[0]); 231 ib_free_send_mad(msg); 232 } 233 234 static void * cm_copy_private_data(const void *private_data, 235 u8 private_data_len) 236 { 237 void *data; 238 239 if (!private_data || !private_data_len) 240 return NULL; 241 242 data = kmemdup(private_data, private_data_len, GFP_KERNEL); 243 if (!data) 244 return ERR_PTR(-ENOMEM); 245 246 return data; 247 } 248 249 static void cm_set_private_data(struct cm_id_private *cm_id_priv, 250 void *private_data, u8 private_data_len) 251 { 252 if (cm_id_priv->private_data && cm_id_priv->private_data_len) 253 kfree(cm_id_priv->private_data); 254 255 cm_id_priv->private_data = private_data; 256 cm_id_priv->private_data_len = private_data_len; 257 } 258 259 static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, 260 struct ib_grh *grh, struct cm_av *av) 261 { 262 av->port = port; 263 av->pkey_index = wc->pkey_index; 264 ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc, 265 grh, &av->ah_attr); 266 } 267 268 static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) 269 { 270 struct cm_device *cm_dev; 271 struct cm_port *port = NULL; 272 unsigned long flags; 273 int ret; 274 u8 p; 275 276 read_lock_irqsave(&cm.device_lock, flags); 277 list_for_each_entry(cm_dev, &cm.device_list, list) { 278 if (!ib_find_cached_gid(cm_dev->device, &path->sgid, 279 &p, NULL)) { 280 port = &cm_dev->port[p-1]; 281 break; 282 } 283 } 284 read_unlock_irqrestore(&cm.device_lock, flags); 285 286 if (!port) 287 return -EINVAL; 288 289 ret = ib_find_cached_pkey(cm_dev->device, port->port_num, 290 be16_to_cpu(path->pkey), &av->pkey_index); 291 if (ret) 292 return ret; 293 294 av->port = port; 295 ib_init_ah_from_path(cm_dev->device, port->port_num, path, 296 &av->ah_attr); 297 av->packet_life_time = path->packet_life_time; 298 return 0; 299 } 300 301 static int cm_alloc_id(struct cm_id_private *cm_id_priv) 302 { 303 unsigned long flags; 304 int ret, id; 305 static int next_id; 306 307 do { 308 spin_lock_irqsave(&cm.lock, flags); 309 ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, 310 next_id++, &id); 311 spin_unlock_irqrestore(&cm.lock, flags); 312 } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); 313 314 cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand); 315 return ret; 316 } 317 318 static void cm_free_id(__be32 local_id) 319 { 320 unsigned long flags; 321 322 spin_lock_irqsave(&cm.lock, flags); 323 idr_remove(&cm.local_id_table, 324 (__force int) (local_id ^ cm.random_id_operand)); 325 spin_unlock_irqrestore(&cm.lock, flags); 326 } 327 328 static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) 329 { 330 struct cm_id_private *cm_id_priv; 331 332 cm_id_priv = idr_find(&cm.local_id_table, 333 (__force int) (local_id ^ cm.random_id_operand)); 334 if (cm_id_priv) { 335 if (cm_id_priv->id.remote_id == remote_id) 336 atomic_inc(&cm_id_priv->refcount); 337 else 338 cm_id_priv = NULL; 339 } 340 341 return cm_id_priv; 342 } 343 344 static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) 345 { 346 struct cm_id_private *cm_id_priv; 347 unsigned long flags; 348 349 spin_lock_irqsave(&cm.lock, flags); 350 cm_id_priv = cm_get_id(local_id, remote_id); 351 spin_unlock_irqrestore(&cm.lock, flags); 352 353 return cm_id_priv; 354 } 355 356 static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) 357 { 358 int i; 359 360 for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) 361 ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & 362 ((unsigned long *) mask)[i]; 363 } 364 365 static int cm_compare_data(struct ib_cm_compare_data *src_data, 366 struct ib_cm_compare_data *dst_data) 367 { 368 u8 src[IB_CM_COMPARE_SIZE]; 369 u8 dst[IB_CM_COMPARE_SIZE]; 370 371 if (!src_data || !dst_data) 372 return 0; 373 374 cm_mask_copy(src, src_data->data, dst_data->mask); 375 cm_mask_copy(dst, dst_data->data, src_data->mask); 376 return memcmp(src, dst, IB_CM_COMPARE_SIZE); 377 } 378 379 static int cm_compare_private_data(u8 *private_data, 380 struct ib_cm_compare_data *dst_data) 381 { 382 u8 src[IB_CM_COMPARE_SIZE]; 383 384 if (!dst_data) 385 return 0; 386 387 cm_mask_copy(src, private_data, dst_data->mask); 388 return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); 389 } 390 391 static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) 392 { 393 struct rb_node **link = &cm.listen_service_table.rb_node; 394 struct rb_node *parent = NULL; 395 struct cm_id_private *cur_cm_id_priv; 396 __be64 service_id = cm_id_priv->id.service_id; 397 __be64 service_mask = cm_id_priv->id.service_mask; 398 int data_cmp; 399 400 while (*link) { 401 parent = *link; 402 cur_cm_id_priv = rb_entry(parent, struct cm_id_private, 403 service_node); 404 data_cmp = cm_compare_data(cm_id_priv->compare_data, 405 cur_cm_id_priv->compare_data); 406 if ((cur_cm_id_priv->id.service_mask & service_id) == 407 (service_mask & cur_cm_id_priv->id.service_id) && 408 (cm_id_priv->id.device == cur_cm_id_priv->id.device) && 409 !data_cmp) 410 return cur_cm_id_priv; 411 412 if (cm_id_priv->id.device < cur_cm_id_priv->id.device) 413 link = &(*link)->rb_left; 414 else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) 415 link = &(*link)->rb_right; 416 else if (service_id < cur_cm_id_priv->id.service_id) 417 link = &(*link)->rb_left; 418 else if (service_id > cur_cm_id_priv->id.service_id) 419 link = &(*link)->rb_right; 420 else if (data_cmp < 0) 421 link = &(*link)->rb_left; 422 else 423 link = &(*link)->rb_right; 424 } 425 rb_link_node(&cm_id_priv->service_node, parent, link); 426 rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); 427 return NULL; 428 } 429 430 static struct cm_id_private * cm_find_listen(struct ib_device *device, 431 __be64 service_id, 432 u8 *private_data) 433 { 434 struct rb_node *node = cm.listen_service_table.rb_node; 435 struct cm_id_private *cm_id_priv; 436 int data_cmp; 437 438 while (node) { 439 cm_id_priv = rb_entry(node, struct cm_id_private, service_node); 440 data_cmp = cm_compare_private_data(private_data, 441 cm_id_priv->compare_data); 442 if ((cm_id_priv->id.service_mask & service_id) == 443 cm_id_priv->id.service_id && 444 (cm_id_priv->id.device == device) && !data_cmp) 445 return cm_id_priv; 446 447 if (device < cm_id_priv->id.device) 448 node = node->rb_left; 449 else if (device > cm_id_priv->id.device) 450 node = node->rb_right; 451 else if (service_id < cm_id_priv->id.service_id) 452 node = node->rb_left; 453 else if (service_id > cm_id_priv->id.service_id) 454 node = node->rb_right; 455 else if (data_cmp < 0) 456 node = node->rb_left; 457 else 458 node = node->rb_right; 459 } 460 return NULL; 461 } 462 463 static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info 464 *timewait_info) 465 { 466 struct rb_node **link = &cm.remote_id_table.rb_node; 467 struct rb_node *parent = NULL; 468 struct cm_timewait_info *cur_timewait_info; 469 __be64 remote_ca_guid = timewait_info->remote_ca_guid; 470 __be32 remote_id = timewait_info->work.remote_id; 471 472 while (*link) { 473 parent = *link; 474 cur_timewait_info = rb_entry(parent, struct cm_timewait_info, 475 remote_id_node); 476 if (remote_id < cur_timewait_info->work.remote_id) 477 link = &(*link)->rb_left; 478 else if (remote_id > cur_timewait_info->work.remote_id) 479 link = &(*link)->rb_right; 480 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) 481 link = &(*link)->rb_left; 482 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) 483 link = &(*link)->rb_right; 484 else 485 return cur_timewait_info; 486 } 487 timewait_info->inserted_remote_id = 1; 488 rb_link_node(&timewait_info->remote_id_node, parent, link); 489 rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); 490 return NULL; 491 } 492 493 static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, 494 __be32 remote_id) 495 { 496 struct rb_node *node = cm.remote_id_table.rb_node; 497 struct cm_timewait_info *timewait_info; 498 499 while (node) { 500 timewait_info = rb_entry(node, struct cm_timewait_info, 501 remote_id_node); 502 if (remote_id < timewait_info->work.remote_id) 503 node = node->rb_left; 504 else if (remote_id > timewait_info->work.remote_id) 505 node = node->rb_right; 506 else if (remote_ca_guid < timewait_info->remote_ca_guid) 507 node = node->rb_left; 508 else if (remote_ca_guid > timewait_info->remote_ca_guid) 509 node = node->rb_right; 510 else 511 return timewait_info; 512 } 513 return NULL; 514 } 515 516 static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info 517 *timewait_info) 518 { 519 struct rb_node **link = &cm.remote_qp_table.rb_node; 520 struct rb_node *parent = NULL; 521 struct cm_timewait_info *cur_timewait_info; 522 __be64 remote_ca_guid = timewait_info->remote_ca_guid; 523 __be32 remote_qpn = timewait_info->remote_qpn; 524 525 while (*link) { 526 parent = *link; 527 cur_timewait_info = rb_entry(parent, struct cm_timewait_info, 528 remote_qp_node); 529 if (remote_qpn < cur_timewait_info->remote_qpn) 530 link = &(*link)->rb_left; 531 else if (remote_qpn > cur_timewait_info->remote_qpn) 532 link = &(*link)->rb_right; 533 else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) 534 link = &(*link)->rb_left; 535 else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) 536 link = &(*link)->rb_right; 537 else 538 return cur_timewait_info; 539 } 540 timewait_info->inserted_remote_qp = 1; 541 rb_link_node(&timewait_info->remote_qp_node, parent, link); 542 rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); 543 return NULL; 544 } 545 546 static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private 547 *cm_id_priv) 548 { 549 struct rb_node **link = &cm.remote_sidr_table.rb_node; 550 struct rb_node *parent = NULL; 551 struct cm_id_private *cur_cm_id_priv; 552 union ib_gid *port_gid = &cm_id_priv->av.dgid; 553 __be32 remote_id = cm_id_priv->id.remote_id; 554 555 while (*link) { 556 parent = *link; 557 cur_cm_id_priv = rb_entry(parent, struct cm_id_private, 558 sidr_id_node); 559 if (remote_id < cur_cm_id_priv->id.remote_id) 560 link = &(*link)->rb_left; 561 else if (remote_id > cur_cm_id_priv->id.remote_id) 562 link = &(*link)->rb_right; 563 else { 564 int cmp; 565 cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, 566 sizeof *port_gid); 567 if (cmp < 0) 568 link = &(*link)->rb_left; 569 else if (cmp > 0) 570 link = &(*link)->rb_right; 571 else 572 return cur_cm_id_priv; 573 } 574 } 575 rb_link_node(&cm_id_priv->sidr_id_node, parent, link); 576 rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); 577 return NULL; 578 } 579 580 static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, 581 enum ib_cm_sidr_status status) 582 { 583 struct ib_cm_sidr_rep_param param; 584 585 memset(¶m, 0, sizeof param); 586 param.status = status; 587 ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); 588 } 589 590 struct ib_cm_id *ib_create_cm_id(struct ib_device *device, 591 ib_cm_handler cm_handler, 592 void *context) 593 { 594 struct cm_id_private *cm_id_priv; 595 int ret; 596 597 cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); 598 if (!cm_id_priv) 599 return ERR_PTR(-ENOMEM); 600 601 cm_id_priv->id.state = IB_CM_IDLE; 602 cm_id_priv->id.device = device; 603 cm_id_priv->id.cm_handler = cm_handler; 604 cm_id_priv->id.context = context; 605 cm_id_priv->id.remote_cm_qpn = 1; 606 ret = cm_alloc_id(cm_id_priv); 607 if (ret) 608 goto error; 609 610 spin_lock_init(&cm_id_priv->lock); 611 init_completion(&cm_id_priv->comp); 612 INIT_LIST_HEAD(&cm_id_priv->work_list); 613 atomic_set(&cm_id_priv->work_count, -1); 614 atomic_set(&cm_id_priv->refcount, 1); 615 return &cm_id_priv->id; 616 617 error: 618 kfree(cm_id_priv); 619 return ERR_PTR(-ENOMEM); 620 } 621 EXPORT_SYMBOL(ib_create_cm_id); 622 623 static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) 624 { 625 struct cm_work *work; 626 627 if (list_empty(&cm_id_priv->work_list)) 628 return NULL; 629 630 work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); 631 list_del(&work->list); 632 return work; 633 } 634 635 static void cm_free_work(struct cm_work *work) 636 { 637 if (work->mad_recv_wc) 638 ib_free_recv_mad(work->mad_recv_wc); 639 kfree(work); 640 } 641 642 static inline int cm_convert_to_ms(int iba_time) 643 { 644 /* approximate conversion to ms from 4.096us x 2^iba_time */ 645 return 1 << max(iba_time - 8, 0); 646 } 647 648 static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) 649 { 650 if (timewait_info->inserted_remote_id) { 651 rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); 652 timewait_info->inserted_remote_id = 0; 653 } 654 655 if (timewait_info->inserted_remote_qp) { 656 rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); 657 timewait_info->inserted_remote_qp = 0; 658 } 659 } 660 661 static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) 662 { 663 struct cm_timewait_info *timewait_info; 664 665 timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); 666 if (!timewait_info) 667 return ERR_PTR(-ENOMEM); 668 669 timewait_info->work.local_id = local_id; 670 INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); 671 timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; 672 return timewait_info; 673 } 674 675 static void cm_enter_timewait(struct cm_id_private *cm_id_priv) 676 { 677 int wait_time; 678 unsigned long flags; 679 680 spin_lock_irqsave(&cm.lock, flags); 681 cm_cleanup_timewait(cm_id_priv->timewait_info); 682 list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); 683 spin_unlock_irqrestore(&cm.lock, flags); 684 685 /* 686 * The cm_id could be destroyed by the user before we exit timewait. 687 * To protect against this, we search for the cm_id after exiting 688 * timewait before notifying the user that we've exited timewait. 689 */ 690 cm_id_priv->id.state = IB_CM_TIMEWAIT; 691 wait_time = cm_convert_to_ms(cm_id_priv->av.packet_life_time + 1); 692 queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, 693 msecs_to_jiffies(wait_time)); 694 cm_id_priv->timewait_info = NULL; 695 } 696 697 static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) 698 { 699 unsigned long flags; 700 701 cm_id_priv->id.state = IB_CM_IDLE; 702 if (cm_id_priv->timewait_info) { 703 spin_lock_irqsave(&cm.lock, flags); 704 cm_cleanup_timewait(cm_id_priv->timewait_info); 705 spin_unlock_irqrestore(&cm.lock, flags); 706 kfree(cm_id_priv->timewait_info); 707 cm_id_priv->timewait_info = NULL; 708 } 709 } 710 711 static void cm_destroy_id(struct ib_cm_id *cm_id, int err) 712 { 713 struct cm_id_private *cm_id_priv; 714 struct cm_work *work; 715 unsigned long flags; 716 717 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 718 retest: 719 spin_lock_irqsave(&cm_id_priv->lock, flags); 720 switch (cm_id->state) { 721 case IB_CM_LISTEN: 722 cm_id->state = IB_CM_IDLE; 723 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 724 spin_lock_irqsave(&cm.lock, flags); 725 rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); 726 spin_unlock_irqrestore(&cm.lock, flags); 727 break; 728 case IB_CM_SIDR_REQ_SENT: 729 cm_id->state = IB_CM_IDLE; 730 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 731 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 732 break; 733 case IB_CM_SIDR_REQ_RCVD: 734 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 735 cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); 736 break; 737 case IB_CM_REQ_SENT: 738 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 739 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 740 ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, 741 &cm_id_priv->id.device->node_guid, 742 sizeof cm_id_priv->id.device->node_guid, 743 NULL, 0); 744 break; 745 case IB_CM_REQ_RCVD: 746 if (err == -ENOMEM) { 747 /* Do not reject to allow future retries. */ 748 cm_reset_to_idle(cm_id_priv); 749 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 750 } else { 751 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 752 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, 753 NULL, 0, NULL, 0); 754 } 755 break; 756 case IB_CM_MRA_REQ_RCVD: 757 case IB_CM_REP_SENT: 758 case IB_CM_MRA_REP_RCVD: 759 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 760 /* Fall through */ 761 case IB_CM_MRA_REQ_SENT: 762 case IB_CM_REP_RCVD: 763 case IB_CM_MRA_REP_SENT: 764 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 765 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, 766 NULL, 0, NULL, 0); 767 break; 768 case IB_CM_ESTABLISHED: 769 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 770 ib_send_cm_dreq(cm_id, NULL, 0); 771 goto retest; 772 case IB_CM_DREQ_SENT: 773 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 774 cm_enter_timewait(cm_id_priv); 775 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 776 break; 777 case IB_CM_DREQ_RCVD: 778 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 779 ib_send_cm_drep(cm_id, NULL, 0); 780 break; 781 default: 782 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 783 break; 784 } 785 786 cm_free_id(cm_id->local_id); 787 cm_deref_id(cm_id_priv); 788 wait_for_completion(&cm_id_priv->comp); 789 while ((work = cm_dequeue_work(cm_id_priv)) != NULL) 790 cm_free_work(work); 791 kfree(cm_id_priv->compare_data); 792 kfree(cm_id_priv->private_data); 793 kfree(cm_id_priv); 794 } 795 796 void ib_destroy_cm_id(struct ib_cm_id *cm_id) 797 { 798 cm_destroy_id(cm_id, 0); 799 } 800 EXPORT_SYMBOL(ib_destroy_cm_id); 801 802 int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, 803 struct ib_cm_compare_data *compare_data) 804 { 805 struct cm_id_private *cm_id_priv, *cur_cm_id_priv; 806 unsigned long flags; 807 int ret = 0; 808 809 service_mask = service_mask ? service_mask : 810 __constant_cpu_to_be64(~0ULL); 811 service_id &= service_mask; 812 if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && 813 (service_id != IB_CM_ASSIGN_SERVICE_ID)) 814 return -EINVAL; 815 816 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 817 if (cm_id->state != IB_CM_IDLE) 818 return -EINVAL; 819 820 if (compare_data) { 821 cm_id_priv->compare_data = kzalloc(sizeof *compare_data, 822 GFP_KERNEL); 823 if (!cm_id_priv->compare_data) 824 return -ENOMEM; 825 cm_mask_copy(cm_id_priv->compare_data->data, 826 compare_data->data, compare_data->mask); 827 memcpy(cm_id_priv->compare_data->mask, compare_data->mask, 828 IB_CM_COMPARE_SIZE); 829 } 830 831 cm_id->state = IB_CM_LISTEN; 832 833 spin_lock_irqsave(&cm.lock, flags); 834 if (service_id == IB_CM_ASSIGN_SERVICE_ID) { 835 cm_id->service_id = cpu_to_be64(cm.listen_service_id++); 836 cm_id->service_mask = __constant_cpu_to_be64(~0ULL); 837 } else { 838 cm_id->service_id = service_id; 839 cm_id->service_mask = service_mask; 840 } 841 cur_cm_id_priv = cm_insert_listen(cm_id_priv); 842 spin_unlock_irqrestore(&cm.lock, flags); 843 844 if (cur_cm_id_priv) { 845 cm_id->state = IB_CM_IDLE; 846 kfree(cm_id_priv->compare_data); 847 cm_id_priv->compare_data = NULL; 848 ret = -EBUSY; 849 } 850 return ret; 851 } 852 EXPORT_SYMBOL(ib_cm_listen); 853 854 static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, 855 enum cm_msg_sequence msg_seq) 856 { 857 u64 hi_tid, low_tid; 858 859 hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; 860 low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | 861 (msg_seq << 30)); 862 return cpu_to_be64(hi_tid | low_tid); 863 } 864 865 static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, 866 __be16 attr_id, __be64 tid) 867 { 868 hdr->base_version = IB_MGMT_BASE_VERSION; 869 hdr->mgmt_class = IB_MGMT_CLASS_CM; 870 hdr->class_version = IB_CM_CLASS_VERSION; 871 hdr->method = IB_MGMT_METHOD_SEND; 872 hdr->attr_id = attr_id; 873 hdr->tid = tid; 874 } 875 876 static void cm_format_req(struct cm_req_msg *req_msg, 877 struct cm_id_private *cm_id_priv, 878 struct ib_cm_req_param *param) 879 { 880 cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, 881 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); 882 883 req_msg->local_comm_id = cm_id_priv->id.local_id; 884 req_msg->service_id = param->service_id; 885 req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; 886 cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); 887 cm_req_set_resp_res(req_msg, param->responder_resources); 888 cm_req_set_init_depth(req_msg, param->initiator_depth); 889 cm_req_set_remote_resp_timeout(req_msg, 890 param->remote_cm_response_timeout); 891 cm_req_set_qp_type(req_msg, param->qp_type); 892 cm_req_set_flow_ctrl(req_msg, param->flow_control); 893 cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); 894 cm_req_set_local_resp_timeout(req_msg, 895 param->local_cm_response_timeout); 896 cm_req_set_retry_count(req_msg, param->retry_count); 897 req_msg->pkey = param->primary_path->pkey; 898 cm_req_set_path_mtu(req_msg, param->primary_path->mtu); 899 cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); 900 cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); 901 cm_req_set_srq(req_msg, param->srq); 902 903 req_msg->primary_local_lid = param->primary_path->slid; 904 req_msg->primary_remote_lid = param->primary_path->dlid; 905 req_msg->primary_local_gid = param->primary_path->sgid; 906 req_msg->primary_remote_gid = param->primary_path->dgid; 907 cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); 908 cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); 909 req_msg->primary_traffic_class = param->primary_path->traffic_class; 910 req_msg->primary_hop_limit = param->primary_path->hop_limit; 911 cm_req_set_primary_sl(req_msg, param->primary_path->sl); 912 cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ 913 cm_req_set_primary_local_ack_timeout(req_msg, 914 min(31, param->primary_path->packet_life_time + 1)); 915 916 if (param->alternate_path) { 917 req_msg->alt_local_lid = param->alternate_path->slid; 918 req_msg->alt_remote_lid = param->alternate_path->dlid; 919 req_msg->alt_local_gid = param->alternate_path->sgid; 920 req_msg->alt_remote_gid = param->alternate_path->dgid; 921 cm_req_set_alt_flow_label(req_msg, 922 param->alternate_path->flow_label); 923 cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); 924 req_msg->alt_traffic_class = param->alternate_path->traffic_class; 925 req_msg->alt_hop_limit = param->alternate_path->hop_limit; 926 cm_req_set_alt_sl(req_msg, param->alternate_path->sl); 927 cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ 928 cm_req_set_alt_local_ack_timeout(req_msg, 929 min(31, param->alternate_path->packet_life_time + 1)); 930 } 931 932 if (param->private_data && param->private_data_len) 933 memcpy(req_msg->private_data, param->private_data, 934 param->private_data_len); 935 } 936 937 static int cm_validate_req_param(struct ib_cm_req_param *param) 938 { 939 /* peer-to-peer not supported */ 940 if (param->peer_to_peer) 941 return -EINVAL; 942 943 if (!param->primary_path) 944 return -EINVAL; 945 946 if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) 947 return -EINVAL; 948 949 if (param->private_data && 950 param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) 951 return -EINVAL; 952 953 if (param->alternate_path && 954 (param->alternate_path->pkey != param->primary_path->pkey || 955 param->alternate_path->mtu != param->primary_path->mtu)) 956 return -EINVAL; 957 958 return 0; 959 } 960 961 int ib_send_cm_req(struct ib_cm_id *cm_id, 962 struct ib_cm_req_param *param) 963 { 964 struct cm_id_private *cm_id_priv; 965 struct cm_req_msg *req_msg; 966 unsigned long flags; 967 int ret; 968 969 ret = cm_validate_req_param(param); 970 if (ret) 971 return ret; 972 973 /* Verify that we're not in timewait. */ 974 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 975 spin_lock_irqsave(&cm_id_priv->lock, flags); 976 if (cm_id->state != IB_CM_IDLE) { 977 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 978 ret = -EINVAL; 979 goto out; 980 } 981 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 982 983 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> 984 id.local_id); 985 if (IS_ERR(cm_id_priv->timewait_info)) { 986 ret = PTR_ERR(cm_id_priv->timewait_info); 987 goto out; 988 } 989 990 ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); 991 if (ret) 992 goto error1; 993 if (param->alternate_path) { 994 ret = cm_init_av_by_path(param->alternate_path, 995 &cm_id_priv->alt_av); 996 if (ret) 997 goto error1; 998 } 999 cm_id->service_id = param->service_id; 1000 cm_id->service_mask = __constant_cpu_to_be64(~0ULL); 1001 cm_id_priv->timeout_ms = cm_convert_to_ms( 1002 param->primary_path->packet_life_time) * 2 + 1003 cm_convert_to_ms( 1004 param->remote_cm_response_timeout); 1005 cm_id_priv->max_cm_retries = param->max_cm_retries; 1006 cm_id_priv->initiator_depth = param->initiator_depth; 1007 cm_id_priv->responder_resources = param->responder_resources; 1008 cm_id_priv->retry_count = param->retry_count; 1009 cm_id_priv->path_mtu = param->primary_path->mtu; 1010 cm_id_priv->pkey = param->primary_path->pkey; 1011 cm_id_priv->qp_type = param->qp_type; 1012 1013 ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); 1014 if (ret) 1015 goto error1; 1016 1017 req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; 1018 cm_format_req(req_msg, cm_id_priv, param); 1019 cm_id_priv->tid = req_msg->hdr.tid; 1020 cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; 1021 cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; 1022 1023 cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); 1024 cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); 1025 1026 spin_lock_irqsave(&cm_id_priv->lock, flags); 1027 ret = ib_post_send_mad(cm_id_priv->msg, NULL); 1028 if (ret) { 1029 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1030 goto error2; 1031 } 1032 BUG_ON(cm_id->state != IB_CM_IDLE); 1033 cm_id->state = IB_CM_REQ_SENT; 1034 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1035 return 0; 1036 1037 error2: cm_free_msg(cm_id_priv->msg); 1038 error1: kfree(cm_id_priv->timewait_info); 1039 out: return ret; 1040 } 1041 EXPORT_SYMBOL(ib_send_cm_req); 1042 1043 static int cm_issue_rej(struct cm_port *port, 1044 struct ib_mad_recv_wc *mad_recv_wc, 1045 enum ib_cm_rej_reason reason, 1046 enum cm_msg_response msg_rejected, 1047 void *ari, u8 ari_length) 1048 { 1049 struct ib_mad_send_buf *msg = NULL; 1050 struct cm_rej_msg *rej_msg, *rcv_msg; 1051 int ret; 1052 1053 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); 1054 if (ret) 1055 return ret; 1056 1057 /* We just need common CM header information. Cast to any message. */ 1058 rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; 1059 rej_msg = (struct cm_rej_msg *) msg->mad; 1060 1061 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); 1062 rej_msg->remote_comm_id = rcv_msg->local_comm_id; 1063 rej_msg->local_comm_id = rcv_msg->remote_comm_id; 1064 cm_rej_set_msg_rejected(rej_msg, msg_rejected); 1065 rej_msg->reason = cpu_to_be16(reason); 1066 1067 if (ari && ari_length) { 1068 cm_rej_set_reject_info_len(rej_msg, ari_length); 1069 memcpy(rej_msg->ari, ari, ari_length); 1070 } 1071 1072 ret = ib_post_send_mad(msg, NULL); 1073 if (ret) 1074 cm_free_msg(msg); 1075 1076 return ret; 1077 } 1078 1079 static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, 1080 __be32 local_qpn, __be32 remote_qpn) 1081 { 1082 return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || 1083 ((local_ca_guid == remote_ca_guid) && 1084 (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); 1085 } 1086 1087 static void cm_format_paths_from_req(struct cm_req_msg *req_msg, 1088 struct ib_sa_path_rec *primary_path, 1089 struct ib_sa_path_rec *alt_path) 1090 { 1091 memset(primary_path, 0, sizeof *primary_path); 1092 primary_path->dgid = req_msg->primary_local_gid; 1093 primary_path->sgid = req_msg->primary_remote_gid; 1094 primary_path->dlid = req_msg->primary_local_lid; 1095 primary_path->slid = req_msg->primary_remote_lid; 1096 primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); 1097 primary_path->hop_limit = req_msg->primary_hop_limit; 1098 primary_path->traffic_class = req_msg->primary_traffic_class; 1099 primary_path->reversible = 1; 1100 primary_path->pkey = req_msg->pkey; 1101 primary_path->sl = cm_req_get_primary_sl(req_msg); 1102 primary_path->mtu_selector = IB_SA_EQ; 1103 primary_path->mtu = cm_req_get_path_mtu(req_msg); 1104 primary_path->rate_selector = IB_SA_EQ; 1105 primary_path->rate = cm_req_get_primary_packet_rate(req_msg); 1106 primary_path->packet_life_time_selector = IB_SA_EQ; 1107 primary_path->packet_life_time = 1108 cm_req_get_primary_local_ack_timeout(req_msg); 1109 primary_path->packet_life_time -= (primary_path->packet_life_time > 0); 1110 1111 if (req_msg->alt_local_lid) { 1112 memset(alt_path, 0, sizeof *alt_path); 1113 alt_path->dgid = req_msg->alt_local_gid; 1114 alt_path->sgid = req_msg->alt_remote_gid; 1115 alt_path->dlid = req_msg->alt_local_lid; 1116 alt_path->slid = req_msg->alt_remote_lid; 1117 alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); 1118 alt_path->hop_limit = req_msg->alt_hop_limit; 1119 alt_path->traffic_class = req_msg->alt_traffic_class; 1120 alt_path->reversible = 1; 1121 alt_path->pkey = req_msg->pkey; 1122 alt_path->sl = cm_req_get_alt_sl(req_msg); 1123 alt_path->mtu_selector = IB_SA_EQ; 1124 alt_path->mtu = cm_req_get_path_mtu(req_msg); 1125 alt_path->rate_selector = IB_SA_EQ; 1126 alt_path->rate = cm_req_get_alt_packet_rate(req_msg); 1127 alt_path->packet_life_time_selector = IB_SA_EQ; 1128 alt_path->packet_life_time = 1129 cm_req_get_alt_local_ack_timeout(req_msg); 1130 alt_path->packet_life_time -= (alt_path->packet_life_time > 0); 1131 } 1132 } 1133 1134 static void cm_format_req_event(struct cm_work *work, 1135 struct cm_id_private *cm_id_priv, 1136 struct ib_cm_id *listen_id) 1137 { 1138 struct cm_req_msg *req_msg; 1139 struct ib_cm_req_event_param *param; 1140 1141 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; 1142 param = &work->cm_event.param.req_rcvd; 1143 param->listen_id = listen_id; 1144 param->port = cm_id_priv->av.port->port_num; 1145 param->primary_path = &work->path[0]; 1146 if (req_msg->alt_local_lid) 1147 param->alternate_path = &work->path[1]; 1148 else 1149 param->alternate_path = NULL; 1150 param->remote_ca_guid = req_msg->local_ca_guid; 1151 param->remote_qkey = be32_to_cpu(req_msg->local_qkey); 1152 param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); 1153 param->qp_type = cm_req_get_qp_type(req_msg); 1154 param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); 1155 param->responder_resources = cm_req_get_init_depth(req_msg); 1156 param->initiator_depth = cm_req_get_resp_res(req_msg); 1157 param->local_cm_response_timeout = 1158 cm_req_get_remote_resp_timeout(req_msg); 1159 param->flow_control = cm_req_get_flow_ctrl(req_msg); 1160 param->remote_cm_response_timeout = 1161 cm_req_get_local_resp_timeout(req_msg); 1162 param->retry_count = cm_req_get_retry_count(req_msg); 1163 param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); 1164 param->srq = cm_req_get_srq(req_msg); 1165 work->cm_event.private_data = &req_msg->private_data; 1166 } 1167 1168 static void cm_process_work(struct cm_id_private *cm_id_priv, 1169 struct cm_work *work) 1170 { 1171 unsigned long flags; 1172 int ret; 1173 1174 /* We will typically only have the current event to report. */ 1175 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); 1176 cm_free_work(work); 1177 1178 while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { 1179 spin_lock_irqsave(&cm_id_priv->lock, flags); 1180 work = cm_dequeue_work(cm_id_priv); 1181 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1182 BUG_ON(!work); 1183 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, 1184 &work->cm_event); 1185 cm_free_work(work); 1186 } 1187 cm_deref_id(cm_id_priv); 1188 if (ret) 1189 cm_destroy_id(&cm_id_priv->id, ret); 1190 } 1191 1192 static void cm_format_mra(struct cm_mra_msg *mra_msg, 1193 struct cm_id_private *cm_id_priv, 1194 enum cm_msg_response msg_mraed, u8 service_timeout, 1195 const void *private_data, u8 private_data_len) 1196 { 1197 cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); 1198 cm_mra_set_msg_mraed(mra_msg, msg_mraed); 1199 mra_msg->local_comm_id = cm_id_priv->id.local_id; 1200 mra_msg->remote_comm_id = cm_id_priv->id.remote_id; 1201 cm_mra_set_service_timeout(mra_msg, service_timeout); 1202 1203 if (private_data && private_data_len) 1204 memcpy(mra_msg->private_data, private_data, private_data_len); 1205 } 1206 1207 static void cm_format_rej(struct cm_rej_msg *rej_msg, 1208 struct cm_id_private *cm_id_priv, 1209 enum ib_cm_rej_reason reason, 1210 void *ari, 1211 u8 ari_length, 1212 const void *private_data, 1213 u8 private_data_len) 1214 { 1215 cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); 1216 rej_msg->remote_comm_id = cm_id_priv->id.remote_id; 1217 1218 switch(cm_id_priv->id.state) { 1219 case IB_CM_REQ_RCVD: 1220 rej_msg->local_comm_id = 0; 1221 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); 1222 break; 1223 case IB_CM_MRA_REQ_SENT: 1224 rej_msg->local_comm_id = cm_id_priv->id.local_id; 1225 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); 1226 break; 1227 case IB_CM_REP_RCVD: 1228 case IB_CM_MRA_REP_SENT: 1229 rej_msg->local_comm_id = cm_id_priv->id.local_id; 1230 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); 1231 break; 1232 default: 1233 rej_msg->local_comm_id = cm_id_priv->id.local_id; 1234 cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); 1235 break; 1236 } 1237 1238 rej_msg->reason = cpu_to_be16(reason); 1239 if (ari && ari_length) { 1240 cm_rej_set_reject_info_len(rej_msg, ari_length); 1241 memcpy(rej_msg->ari, ari, ari_length); 1242 } 1243 1244 if (private_data && private_data_len) 1245 memcpy(rej_msg->private_data, private_data, private_data_len); 1246 } 1247 1248 static void cm_dup_req_handler(struct cm_work *work, 1249 struct cm_id_private *cm_id_priv) 1250 { 1251 struct ib_mad_send_buf *msg = NULL; 1252 unsigned long flags; 1253 int ret; 1254 1255 /* Quick state check to discard duplicate REQs. */ 1256 if (cm_id_priv->id.state == IB_CM_REQ_RCVD) 1257 return; 1258 1259 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); 1260 if (ret) 1261 return; 1262 1263 spin_lock_irqsave(&cm_id_priv->lock, flags); 1264 switch (cm_id_priv->id.state) { 1265 case IB_CM_MRA_REQ_SENT: 1266 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, 1267 CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, 1268 cm_id_priv->private_data, 1269 cm_id_priv->private_data_len); 1270 break; 1271 case IB_CM_TIMEWAIT: 1272 cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, 1273 IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); 1274 break; 1275 default: 1276 goto unlock; 1277 } 1278 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1279 1280 ret = ib_post_send_mad(msg, NULL); 1281 if (ret) 1282 goto free; 1283 return; 1284 1285 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1286 free: cm_free_msg(msg); 1287 } 1288 1289 static struct cm_id_private * cm_match_req(struct cm_work *work, 1290 struct cm_id_private *cm_id_priv) 1291 { 1292 struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; 1293 struct cm_timewait_info *timewait_info; 1294 struct cm_req_msg *req_msg; 1295 unsigned long flags; 1296 1297 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; 1298 1299 /* Check for duplicate REQ and stale connections. */ 1300 spin_lock_irqsave(&cm.lock, flags); 1301 timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); 1302 if (!timewait_info) 1303 timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); 1304 1305 if (timewait_info) { 1306 cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, 1307 timewait_info->work.remote_id); 1308 cm_cleanup_timewait(cm_id_priv->timewait_info); 1309 spin_unlock_irqrestore(&cm.lock, flags); 1310 if (cur_cm_id_priv) { 1311 cm_dup_req_handler(work, cur_cm_id_priv); 1312 cm_deref_id(cur_cm_id_priv); 1313 } else 1314 cm_issue_rej(work->port, work->mad_recv_wc, 1315 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, 1316 NULL, 0); 1317 listen_cm_id_priv = NULL; 1318 goto out; 1319 } 1320 1321 /* Find matching listen request. */ 1322 listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, 1323 req_msg->service_id, 1324 req_msg->private_data); 1325 if (!listen_cm_id_priv) { 1326 cm_cleanup_timewait(cm_id_priv->timewait_info); 1327 spin_unlock_irqrestore(&cm.lock, flags); 1328 cm_issue_rej(work->port, work->mad_recv_wc, 1329 IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, 1330 NULL, 0); 1331 goto out; 1332 } 1333 atomic_inc(&listen_cm_id_priv->refcount); 1334 atomic_inc(&cm_id_priv->refcount); 1335 cm_id_priv->id.state = IB_CM_REQ_RCVD; 1336 atomic_inc(&cm_id_priv->work_count); 1337 spin_unlock_irqrestore(&cm.lock, flags); 1338 out: 1339 return listen_cm_id_priv; 1340 } 1341 1342 static int cm_req_handler(struct cm_work *work) 1343 { 1344 struct ib_cm_id *cm_id; 1345 struct cm_id_private *cm_id_priv, *listen_cm_id_priv; 1346 struct cm_req_msg *req_msg; 1347 int ret; 1348 1349 req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; 1350 1351 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); 1352 if (IS_ERR(cm_id)) 1353 return PTR_ERR(cm_id); 1354 1355 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 1356 cm_id_priv->id.remote_id = req_msg->local_comm_id; 1357 cm_init_av_for_response(work->port, work->mad_recv_wc->wc, 1358 work->mad_recv_wc->recv_buf.grh, 1359 &cm_id_priv->av); 1360 cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> 1361 id.local_id); 1362 if (IS_ERR(cm_id_priv->timewait_info)) { 1363 ret = PTR_ERR(cm_id_priv->timewait_info); 1364 goto destroy; 1365 } 1366 cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; 1367 cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; 1368 cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); 1369 1370 listen_cm_id_priv = cm_match_req(work, cm_id_priv); 1371 if (!listen_cm_id_priv) { 1372 ret = -EINVAL; 1373 kfree(cm_id_priv->timewait_info); 1374 goto destroy; 1375 } 1376 1377 cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; 1378 cm_id_priv->id.context = listen_cm_id_priv->id.context; 1379 cm_id_priv->id.service_id = req_msg->service_id; 1380 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); 1381 1382 cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); 1383 ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); 1384 if (ret) { 1385 ib_get_cached_gid(work->port->cm_dev->device, 1386 work->port->port_num, 0, &work->path[0].sgid); 1387 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, 1388 &work->path[0].sgid, sizeof work->path[0].sgid, 1389 NULL, 0); 1390 goto rejected; 1391 } 1392 if (req_msg->alt_local_lid) { 1393 ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); 1394 if (ret) { 1395 ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, 1396 &work->path[0].sgid, 1397 sizeof work->path[0].sgid, NULL, 0); 1398 goto rejected; 1399 } 1400 } 1401 cm_id_priv->tid = req_msg->hdr.tid; 1402 cm_id_priv->timeout_ms = cm_convert_to_ms( 1403 cm_req_get_local_resp_timeout(req_msg)); 1404 cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); 1405 cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); 1406 cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); 1407 cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); 1408 cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); 1409 cm_id_priv->pkey = req_msg->pkey; 1410 cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); 1411 cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); 1412 cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); 1413 cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); 1414 1415 cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); 1416 cm_process_work(cm_id_priv, work); 1417 cm_deref_id(listen_cm_id_priv); 1418 return 0; 1419 1420 rejected: 1421 atomic_dec(&cm_id_priv->refcount); 1422 cm_deref_id(listen_cm_id_priv); 1423 destroy: 1424 ib_destroy_cm_id(cm_id); 1425 return ret; 1426 } 1427 1428 static void cm_format_rep(struct cm_rep_msg *rep_msg, 1429 struct cm_id_private *cm_id_priv, 1430 struct ib_cm_rep_param *param) 1431 { 1432 cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); 1433 rep_msg->local_comm_id = cm_id_priv->id.local_id; 1434 rep_msg->remote_comm_id = cm_id_priv->id.remote_id; 1435 cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); 1436 cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); 1437 rep_msg->resp_resources = param->responder_resources; 1438 rep_msg->initiator_depth = param->initiator_depth; 1439 cm_rep_set_target_ack_delay(rep_msg, param->target_ack_delay); 1440 cm_rep_set_failover(rep_msg, param->failover_accepted); 1441 cm_rep_set_flow_ctrl(rep_msg, param->flow_control); 1442 cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); 1443 cm_rep_set_srq(rep_msg, param->srq); 1444 rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; 1445 1446 if (param->private_data && param->private_data_len) 1447 memcpy(rep_msg->private_data, param->private_data, 1448 param->private_data_len); 1449 } 1450 1451 int ib_send_cm_rep(struct ib_cm_id *cm_id, 1452 struct ib_cm_rep_param *param) 1453 { 1454 struct cm_id_private *cm_id_priv; 1455 struct ib_mad_send_buf *msg; 1456 struct cm_rep_msg *rep_msg; 1457 unsigned long flags; 1458 int ret; 1459 1460 if (param->private_data && 1461 param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) 1462 return -EINVAL; 1463 1464 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 1465 spin_lock_irqsave(&cm_id_priv->lock, flags); 1466 if (cm_id->state != IB_CM_REQ_RCVD && 1467 cm_id->state != IB_CM_MRA_REQ_SENT) { 1468 ret = -EINVAL; 1469 goto out; 1470 } 1471 1472 ret = cm_alloc_msg(cm_id_priv, &msg); 1473 if (ret) 1474 goto out; 1475 1476 rep_msg = (struct cm_rep_msg *) msg->mad; 1477 cm_format_rep(rep_msg, cm_id_priv, param); 1478 msg->timeout_ms = cm_id_priv->timeout_ms; 1479 msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; 1480 1481 ret = ib_post_send_mad(msg, NULL); 1482 if (ret) { 1483 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1484 cm_free_msg(msg); 1485 return ret; 1486 } 1487 1488 cm_id->state = IB_CM_REP_SENT; 1489 cm_id_priv->msg = msg; 1490 cm_id_priv->initiator_depth = param->initiator_depth; 1491 cm_id_priv->responder_resources = param->responder_resources; 1492 cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); 1493 cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_msg); 1494 1495 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1496 return ret; 1497 } 1498 EXPORT_SYMBOL(ib_send_cm_rep); 1499 1500 static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, 1501 struct cm_id_private *cm_id_priv, 1502 const void *private_data, 1503 u8 private_data_len) 1504 { 1505 cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); 1506 rtu_msg->local_comm_id = cm_id_priv->id.local_id; 1507 rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; 1508 1509 if (private_data && private_data_len) 1510 memcpy(rtu_msg->private_data, private_data, private_data_len); 1511 } 1512 1513 int ib_send_cm_rtu(struct ib_cm_id *cm_id, 1514 const void *private_data, 1515 u8 private_data_len) 1516 { 1517 struct cm_id_private *cm_id_priv; 1518 struct ib_mad_send_buf *msg; 1519 unsigned long flags; 1520 void *data; 1521 int ret; 1522 1523 if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) 1524 return -EINVAL; 1525 1526 data = cm_copy_private_data(private_data, private_data_len); 1527 if (IS_ERR(data)) 1528 return PTR_ERR(data); 1529 1530 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 1531 spin_lock_irqsave(&cm_id_priv->lock, flags); 1532 if (cm_id->state != IB_CM_REP_RCVD && 1533 cm_id->state != IB_CM_MRA_REP_SENT) { 1534 ret = -EINVAL; 1535 goto error; 1536 } 1537 1538 ret = cm_alloc_msg(cm_id_priv, &msg); 1539 if (ret) 1540 goto error; 1541 1542 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, 1543 private_data, private_data_len); 1544 1545 ret = ib_post_send_mad(msg, NULL); 1546 if (ret) { 1547 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1548 cm_free_msg(msg); 1549 kfree(data); 1550 return ret; 1551 } 1552 1553 cm_id->state = IB_CM_ESTABLISHED; 1554 cm_set_private_data(cm_id_priv, data, private_data_len); 1555 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1556 return 0; 1557 1558 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1559 kfree(data); 1560 return ret; 1561 } 1562 EXPORT_SYMBOL(ib_send_cm_rtu); 1563 1564 static void cm_format_rep_event(struct cm_work *work) 1565 { 1566 struct cm_rep_msg *rep_msg; 1567 struct ib_cm_rep_event_param *param; 1568 1569 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; 1570 param = &work->cm_event.param.rep_rcvd; 1571 param->remote_ca_guid = rep_msg->local_ca_guid; 1572 param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); 1573 param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); 1574 param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); 1575 param->responder_resources = rep_msg->initiator_depth; 1576 param->initiator_depth = rep_msg->resp_resources; 1577 param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); 1578 param->failover_accepted = cm_rep_get_failover(rep_msg); 1579 param->flow_control = cm_rep_get_flow_ctrl(rep_msg); 1580 param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); 1581 param->srq = cm_rep_get_srq(rep_msg); 1582 work->cm_event.private_data = &rep_msg->private_data; 1583 } 1584 1585 static void cm_dup_rep_handler(struct cm_work *work) 1586 { 1587 struct cm_id_private *cm_id_priv; 1588 struct cm_rep_msg *rep_msg; 1589 struct ib_mad_send_buf *msg = NULL; 1590 unsigned long flags; 1591 int ret; 1592 1593 rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; 1594 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 1595 rep_msg->local_comm_id); 1596 if (!cm_id_priv) 1597 return; 1598 1599 ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); 1600 if (ret) 1601 goto deref; 1602 1603 spin_lock_irqsave(&cm_id_priv->lock, flags); 1604 if (cm_id_priv->id.state == IB_CM_ESTABLISHED) 1605 cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, 1606 cm_id_priv->private_data, 1607 cm_id_priv->private_data_len); 1608 else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) 1609 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, 1610 CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, 1611 cm_id_priv->private_data, 1612 cm_id_priv->private_data_len); 1613 else 1614 goto unlock; 1615 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1616 1617 ret = ib_post_send_mad(msg, NULL); 1618 if (ret) 1619 goto free; 1620 goto deref; 1621 1622 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1623 free: cm_free_msg(msg); 1624 deref: cm_deref_id(cm_id_priv); 1625 } 1626 1627 static int cm_rep_handler(struct cm_work *work) 1628 { 1629 struct cm_id_private *cm_id_priv; 1630 struct cm_rep_msg *rep_msg; 1631 unsigned long flags; 1632 int ret; 1633 1634 rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; 1635 cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); 1636 if (!cm_id_priv) { 1637 cm_dup_rep_handler(work); 1638 return -EINVAL; 1639 } 1640 1641 cm_format_rep_event(work); 1642 1643 spin_lock_irqsave(&cm_id_priv->lock, flags); 1644 switch (cm_id_priv->id.state) { 1645 case IB_CM_REQ_SENT: 1646 case IB_CM_MRA_REQ_RCVD: 1647 break; 1648 default: 1649 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1650 ret = -EINVAL; 1651 goto error; 1652 } 1653 1654 cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; 1655 cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; 1656 cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); 1657 1658 spin_lock(&cm.lock); 1659 /* Check for duplicate REP. */ 1660 if (cm_insert_remote_id(cm_id_priv->timewait_info)) { 1661 spin_unlock(&cm.lock); 1662 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1663 ret = -EINVAL; 1664 goto error; 1665 } 1666 /* Check for a stale connection. */ 1667 if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { 1668 rb_erase(&cm_id_priv->timewait_info->remote_id_node, 1669 &cm.remote_id_table); 1670 cm_id_priv->timewait_info->inserted_remote_id = 0; 1671 spin_unlock(&cm.lock); 1672 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1673 cm_issue_rej(work->port, work->mad_recv_wc, 1674 IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, 1675 NULL, 0); 1676 ret = -EINVAL; 1677 goto error; 1678 } 1679 spin_unlock(&cm.lock); 1680 1681 cm_id_priv->id.state = IB_CM_REP_RCVD; 1682 cm_id_priv->id.remote_id = rep_msg->local_comm_id; 1683 cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); 1684 cm_id_priv->initiator_depth = rep_msg->resp_resources; 1685 cm_id_priv->responder_resources = rep_msg->initiator_depth; 1686 cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); 1687 cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); 1688 1689 /* todo: handle peer_to_peer */ 1690 1691 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 1692 ret = atomic_inc_and_test(&cm_id_priv->work_count); 1693 if (!ret) 1694 list_add_tail(&work->list, &cm_id_priv->work_list); 1695 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1696 1697 if (ret) 1698 cm_process_work(cm_id_priv, work); 1699 else 1700 cm_deref_id(cm_id_priv); 1701 return 0; 1702 1703 error: 1704 cm_deref_id(cm_id_priv); 1705 return ret; 1706 } 1707 1708 static int cm_establish_handler(struct cm_work *work) 1709 { 1710 struct cm_id_private *cm_id_priv; 1711 unsigned long flags; 1712 int ret; 1713 1714 /* See comment in cm_establish about lookup. */ 1715 cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); 1716 if (!cm_id_priv) 1717 return -EINVAL; 1718 1719 spin_lock_irqsave(&cm_id_priv->lock, flags); 1720 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { 1721 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1722 goto out; 1723 } 1724 1725 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 1726 ret = atomic_inc_and_test(&cm_id_priv->work_count); 1727 if (!ret) 1728 list_add_tail(&work->list, &cm_id_priv->work_list); 1729 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1730 1731 if (ret) 1732 cm_process_work(cm_id_priv, work); 1733 else 1734 cm_deref_id(cm_id_priv); 1735 return 0; 1736 out: 1737 cm_deref_id(cm_id_priv); 1738 return -EINVAL; 1739 } 1740 1741 static int cm_rtu_handler(struct cm_work *work) 1742 { 1743 struct cm_id_private *cm_id_priv; 1744 struct cm_rtu_msg *rtu_msg; 1745 unsigned long flags; 1746 int ret; 1747 1748 rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; 1749 cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, 1750 rtu_msg->local_comm_id); 1751 if (!cm_id_priv) 1752 return -EINVAL; 1753 1754 work->cm_event.private_data = &rtu_msg->private_data; 1755 1756 spin_lock_irqsave(&cm_id_priv->lock, flags); 1757 if (cm_id_priv->id.state != IB_CM_REP_SENT && 1758 cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { 1759 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1760 goto out; 1761 } 1762 cm_id_priv->id.state = IB_CM_ESTABLISHED; 1763 1764 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 1765 ret = atomic_inc_and_test(&cm_id_priv->work_count); 1766 if (!ret) 1767 list_add_tail(&work->list, &cm_id_priv->work_list); 1768 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1769 1770 if (ret) 1771 cm_process_work(cm_id_priv, work); 1772 else 1773 cm_deref_id(cm_id_priv); 1774 return 0; 1775 out: 1776 cm_deref_id(cm_id_priv); 1777 return -EINVAL; 1778 } 1779 1780 static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, 1781 struct cm_id_private *cm_id_priv, 1782 const void *private_data, 1783 u8 private_data_len) 1784 { 1785 cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, 1786 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); 1787 dreq_msg->local_comm_id = cm_id_priv->id.local_id; 1788 dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; 1789 cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); 1790 1791 if (private_data && private_data_len) 1792 memcpy(dreq_msg->private_data, private_data, private_data_len); 1793 } 1794 1795 int ib_send_cm_dreq(struct ib_cm_id *cm_id, 1796 const void *private_data, 1797 u8 private_data_len) 1798 { 1799 struct cm_id_private *cm_id_priv; 1800 struct ib_mad_send_buf *msg; 1801 unsigned long flags; 1802 int ret; 1803 1804 if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) 1805 return -EINVAL; 1806 1807 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 1808 spin_lock_irqsave(&cm_id_priv->lock, flags); 1809 if (cm_id->state != IB_CM_ESTABLISHED) { 1810 ret = -EINVAL; 1811 goto out; 1812 } 1813 1814 ret = cm_alloc_msg(cm_id_priv, &msg); 1815 if (ret) { 1816 cm_enter_timewait(cm_id_priv); 1817 goto out; 1818 } 1819 1820 cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, 1821 private_data, private_data_len); 1822 msg->timeout_ms = cm_id_priv->timeout_ms; 1823 msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; 1824 1825 ret = ib_post_send_mad(msg, NULL); 1826 if (ret) { 1827 cm_enter_timewait(cm_id_priv); 1828 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1829 cm_free_msg(msg); 1830 return ret; 1831 } 1832 1833 cm_id->state = IB_CM_DREQ_SENT; 1834 cm_id_priv->msg = msg; 1835 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1836 return ret; 1837 } 1838 EXPORT_SYMBOL(ib_send_cm_dreq); 1839 1840 static void cm_format_drep(struct cm_drep_msg *drep_msg, 1841 struct cm_id_private *cm_id_priv, 1842 const void *private_data, 1843 u8 private_data_len) 1844 { 1845 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); 1846 drep_msg->local_comm_id = cm_id_priv->id.local_id; 1847 drep_msg->remote_comm_id = cm_id_priv->id.remote_id; 1848 1849 if (private_data && private_data_len) 1850 memcpy(drep_msg->private_data, private_data, private_data_len); 1851 } 1852 1853 int ib_send_cm_drep(struct ib_cm_id *cm_id, 1854 const void *private_data, 1855 u8 private_data_len) 1856 { 1857 struct cm_id_private *cm_id_priv; 1858 struct ib_mad_send_buf *msg; 1859 unsigned long flags; 1860 void *data; 1861 int ret; 1862 1863 if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) 1864 return -EINVAL; 1865 1866 data = cm_copy_private_data(private_data, private_data_len); 1867 if (IS_ERR(data)) 1868 return PTR_ERR(data); 1869 1870 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 1871 spin_lock_irqsave(&cm_id_priv->lock, flags); 1872 if (cm_id->state != IB_CM_DREQ_RCVD) { 1873 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1874 kfree(data); 1875 return -EINVAL; 1876 } 1877 1878 cm_set_private_data(cm_id_priv, data, private_data_len); 1879 cm_enter_timewait(cm_id_priv); 1880 1881 ret = cm_alloc_msg(cm_id_priv, &msg); 1882 if (ret) 1883 goto out; 1884 1885 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, 1886 private_data, private_data_len); 1887 1888 ret = ib_post_send_mad(msg, NULL); 1889 if (ret) { 1890 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1891 cm_free_msg(msg); 1892 return ret; 1893 } 1894 1895 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1896 return ret; 1897 } 1898 EXPORT_SYMBOL(ib_send_cm_drep); 1899 1900 static int cm_issue_drep(struct cm_port *port, 1901 struct ib_mad_recv_wc *mad_recv_wc) 1902 { 1903 struct ib_mad_send_buf *msg = NULL; 1904 struct cm_dreq_msg *dreq_msg; 1905 struct cm_drep_msg *drep_msg; 1906 int ret; 1907 1908 ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); 1909 if (ret) 1910 return ret; 1911 1912 dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; 1913 drep_msg = (struct cm_drep_msg *) msg->mad; 1914 1915 cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); 1916 drep_msg->remote_comm_id = dreq_msg->local_comm_id; 1917 drep_msg->local_comm_id = dreq_msg->remote_comm_id; 1918 1919 ret = ib_post_send_mad(msg, NULL); 1920 if (ret) 1921 cm_free_msg(msg); 1922 1923 return ret; 1924 } 1925 1926 static int cm_dreq_handler(struct cm_work *work) 1927 { 1928 struct cm_id_private *cm_id_priv; 1929 struct cm_dreq_msg *dreq_msg; 1930 struct ib_mad_send_buf *msg = NULL; 1931 unsigned long flags; 1932 int ret; 1933 1934 dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; 1935 cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, 1936 dreq_msg->local_comm_id); 1937 if (!cm_id_priv) { 1938 cm_issue_drep(work->port, work->mad_recv_wc); 1939 return -EINVAL; 1940 } 1941 1942 work->cm_event.private_data = &dreq_msg->private_data; 1943 1944 spin_lock_irqsave(&cm_id_priv->lock, flags); 1945 if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) 1946 goto unlock; 1947 1948 switch (cm_id_priv->id.state) { 1949 case IB_CM_REP_SENT: 1950 case IB_CM_DREQ_SENT: 1951 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 1952 break; 1953 case IB_CM_ESTABLISHED: 1954 case IB_CM_MRA_REP_RCVD: 1955 break; 1956 case IB_CM_TIMEWAIT: 1957 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) 1958 goto unlock; 1959 1960 cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, 1961 cm_id_priv->private_data, 1962 cm_id_priv->private_data_len); 1963 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1964 1965 if (ib_post_send_mad(msg, NULL)) 1966 cm_free_msg(msg); 1967 goto deref; 1968 default: 1969 goto unlock; 1970 } 1971 cm_id_priv->id.state = IB_CM_DREQ_RCVD; 1972 cm_id_priv->tid = dreq_msg->hdr.tid; 1973 ret = atomic_inc_and_test(&cm_id_priv->work_count); 1974 if (!ret) 1975 list_add_tail(&work->list, &cm_id_priv->work_list); 1976 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1977 1978 if (ret) 1979 cm_process_work(cm_id_priv, work); 1980 else 1981 cm_deref_id(cm_id_priv); 1982 return 0; 1983 1984 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 1985 deref: cm_deref_id(cm_id_priv); 1986 return -EINVAL; 1987 } 1988 1989 static int cm_drep_handler(struct cm_work *work) 1990 { 1991 struct cm_id_private *cm_id_priv; 1992 struct cm_drep_msg *drep_msg; 1993 unsigned long flags; 1994 int ret; 1995 1996 drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; 1997 cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, 1998 drep_msg->local_comm_id); 1999 if (!cm_id_priv) 2000 return -EINVAL; 2001 2002 work->cm_event.private_data = &drep_msg->private_data; 2003 2004 spin_lock_irqsave(&cm_id_priv->lock, flags); 2005 if (cm_id_priv->id.state != IB_CM_DREQ_SENT && 2006 cm_id_priv->id.state != IB_CM_DREQ_RCVD) { 2007 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2008 goto out; 2009 } 2010 cm_enter_timewait(cm_id_priv); 2011 2012 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 2013 ret = atomic_inc_and_test(&cm_id_priv->work_count); 2014 if (!ret) 2015 list_add_tail(&work->list, &cm_id_priv->work_list); 2016 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2017 2018 if (ret) 2019 cm_process_work(cm_id_priv, work); 2020 else 2021 cm_deref_id(cm_id_priv); 2022 return 0; 2023 out: 2024 cm_deref_id(cm_id_priv); 2025 return -EINVAL; 2026 } 2027 2028 int ib_send_cm_rej(struct ib_cm_id *cm_id, 2029 enum ib_cm_rej_reason reason, 2030 void *ari, 2031 u8 ari_length, 2032 const void *private_data, 2033 u8 private_data_len) 2034 { 2035 struct cm_id_private *cm_id_priv; 2036 struct ib_mad_send_buf *msg; 2037 unsigned long flags; 2038 int ret; 2039 2040 if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || 2041 (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) 2042 return -EINVAL; 2043 2044 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 2045 2046 spin_lock_irqsave(&cm_id_priv->lock, flags); 2047 switch (cm_id->state) { 2048 case IB_CM_REQ_SENT: 2049 case IB_CM_MRA_REQ_RCVD: 2050 case IB_CM_REQ_RCVD: 2051 case IB_CM_MRA_REQ_SENT: 2052 case IB_CM_REP_RCVD: 2053 case IB_CM_MRA_REP_SENT: 2054 ret = cm_alloc_msg(cm_id_priv, &msg); 2055 if (!ret) 2056 cm_format_rej((struct cm_rej_msg *) msg->mad, 2057 cm_id_priv, reason, ari, ari_length, 2058 private_data, private_data_len); 2059 2060 cm_reset_to_idle(cm_id_priv); 2061 break; 2062 case IB_CM_REP_SENT: 2063 case IB_CM_MRA_REP_RCVD: 2064 ret = cm_alloc_msg(cm_id_priv, &msg); 2065 if (!ret) 2066 cm_format_rej((struct cm_rej_msg *) msg->mad, 2067 cm_id_priv, reason, ari, ari_length, 2068 private_data, private_data_len); 2069 2070 cm_enter_timewait(cm_id_priv); 2071 break; 2072 default: 2073 ret = -EINVAL; 2074 goto out; 2075 } 2076 2077 if (ret) 2078 goto out; 2079 2080 ret = ib_post_send_mad(msg, NULL); 2081 if (ret) 2082 cm_free_msg(msg); 2083 2084 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2085 return ret; 2086 } 2087 EXPORT_SYMBOL(ib_send_cm_rej); 2088 2089 static void cm_format_rej_event(struct cm_work *work) 2090 { 2091 struct cm_rej_msg *rej_msg; 2092 struct ib_cm_rej_event_param *param; 2093 2094 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; 2095 param = &work->cm_event.param.rej_rcvd; 2096 param->ari = rej_msg->ari; 2097 param->ari_length = cm_rej_get_reject_info_len(rej_msg); 2098 param->reason = __be16_to_cpu(rej_msg->reason); 2099 work->cm_event.private_data = &rej_msg->private_data; 2100 } 2101 2102 static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) 2103 { 2104 struct cm_timewait_info *timewait_info; 2105 struct cm_id_private *cm_id_priv; 2106 unsigned long flags; 2107 __be32 remote_id; 2108 2109 remote_id = rej_msg->local_comm_id; 2110 2111 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { 2112 spin_lock_irqsave(&cm.lock, flags); 2113 timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), 2114 remote_id); 2115 if (!timewait_info) { 2116 spin_unlock_irqrestore(&cm.lock, flags); 2117 return NULL; 2118 } 2119 cm_id_priv = idr_find(&cm.local_id_table, (__force int) 2120 (timewait_info->work.local_id ^ 2121 cm.random_id_operand)); 2122 if (cm_id_priv) { 2123 if (cm_id_priv->id.remote_id == remote_id) 2124 atomic_inc(&cm_id_priv->refcount); 2125 else 2126 cm_id_priv = NULL; 2127 } 2128 spin_unlock_irqrestore(&cm.lock, flags); 2129 } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) 2130 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); 2131 else 2132 cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); 2133 2134 return cm_id_priv; 2135 } 2136 2137 static int cm_rej_handler(struct cm_work *work) 2138 { 2139 struct cm_id_private *cm_id_priv; 2140 struct cm_rej_msg *rej_msg; 2141 unsigned long flags; 2142 int ret; 2143 2144 rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; 2145 cm_id_priv = cm_acquire_rejected_id(rej_msg); 2146 if (!cm_id_priv) 2147 return -EINVAL; 2148 2149 cm_format_rej_event(work); 2150 2151 spin_lock_irqsave(&cm_id_priv->lock, flags); 2152 switch (cm_id_priv->id.state) { 2153 case IB_CM_REQ_SENT: 2154 case IB_CM_MRA_REQ_RCVD: 2155 case IB_CM_REP_SENT: 2156 case IB_CM_MRA_REP_RCVD: 2157 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 2158 /* fall through */ 2159 case IB_CM_REQ_RCVD: 2160 case IB_CM_MRA_REQ_SENT: 2161 if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) 2162 cm_enter_timewait(cm_id_priv); 2163 else 2164 cm_reset_to_idle(cm_id_priv); 2165 break; 2166 case IB_CM_DREQ_SENT: 2167 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 2168 /* fall through */ 2169 case IB_CM_REP_RCVD: 2170 case IB_CM_MRA_REP_SENT: 2171 case IB_CM_ESTABLISHED: 2172 cm_enter_timewait(cm_id_priv); 2173 break; 2174 default: 2175 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2176 ret = -EINVAL; 2177 goto out; 2178 } 2179 2180 ret = atomic_inc_and_test(&cm_id_priv->work_count); 2181 if (!ret) 2182 list_add_tail(&work->list, &cm_id_priv->work_list); 2183 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2184 2185 if (ret) 2186 cm_process_work(cm_id_priv, work); 2187 else 2188 cm_deref_id(cm_id_priv); 2189 return 0; 2190 out: 2191 cm_deref_id(cm_id_priv); 2192 return -EINVAL; 2193 } 2194 2195 int ib_send_cm_mra(struct ib_cm_id *cm_id, 2196 u8 service_timeout, 2197 const void *private_data, 2198 u8 private_data_len) 2199 { 2200 struct cm_id_private *cm_id_priv; 2201 struct ib_mad_send_buf *msg; 2202 void *data; 2203 unsigned long flags; 2204 int ret; 2205 2206 if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) 2207 return -EINVAL; 2208 2209 data = cm_copy_private_data(private_data, private_data_len); 2210 if (IS_ERR(data)) 2211 return PTR_ERR(data); 2212 2213 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 2214 2215 spin_lock_irqsave(&cm_id_priv->lock, flags); 2216 switch(cm_id_priv->id.state) { 2217 case IB_CM_REQ_RCVD: 2218 ret = cm_alloc_msg(cm_id_priv, &msg); 2219 if (ret) 2220 goto error1; 2221 2222 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, 2223 CM_MSG_RESPONSE_REQ, service_timeout, 2224 private_data, private_data_len); 2225 ret = ib_post_send_mad(msg, NULL); 2226 if (ret) 2227 goto error2; 2228 cm_id->state = IB_CM_MRA_REQ_SENT; 2229 break; 2230 case IB_CM_REP_RCVD: 2231 ret = cm_alloc_msg(cm_id_priv, &msg); 2232 if (ret) 2233 goto error1; 2234 2235 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, 2236 CM_MSG_RESPONSE_REP, service_timeout, 2237 private_data, private_data_len); 2238 ret = ib_post_send_mad(msg, NULL); 2239 if (ret) 2240 goto error2; 2241 cm_id->state = IB_CM_MRA_REP_SENT; 2242 break; 2243 case IB_CM_ESTABLISHED: 2244 ret = cm_alloc_msg(cm_id_priv, &msg); 2245 if (ret) 2246 goto error1; 2247 2248 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, 2249 CM_MSG_RESPONSE_OTHER, service_timeout, 2250 private_data, private_data_len); 2251 ret = ib_post_send_mad(msg, NULL); 2252 if (ret) 2253 goto error2; 2254 cm_id->lap_state = IB_CM_MRA_LAP_SENT; 2255 break; 2256 default: 2257 ret = -EINVAL; 2258 goto error1; 2259 } 2260 cm_id_priv->service_timeout = service_timeout; 2261 cm_set_private_data(cm_id_priv, data, private_data_len); 2262 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2263 return 0; 2264 2265 error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2266 kfree(data); 2267 return ret; 2268 2269 error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2270 kfree(data); 2271 cm_free_msg(msg); 2272 return ret; 2273 } 2274 EXPORT_SYMBOL(ib_send_cm_mra); 2275 2276 static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) 2277 { 2278 switch (cm_mra_get_msg_mraed(mra_msg)) { 2279 case CM_MSG_RESPONSE_REQ: 2280 return cm_acquire_id(mra_msg->remote_comm_id, 0); 2281 case CM_MSG_RESPONSE_REP: 2282 case CM_MSG_RESPONSE_OTHER: 2283 return cm_acquire_id(mra_msg->remote_comm_id, 2284 mra_msg->local_comm_id); 2285 default: 2286 return NULL; 2287 } 2288 } 2289 2290 static int cm_mra_handler(struct cm_work *work) 2291 { 2292 struct cm_id_private *cm_id_priv; 2293 struct cm_mra_msg *mra_msg; 2294 unsigned long flags; 2295 int timeout, ret; 2296 2297 mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; 2298 cm_id_priv = cm_acquire_mraed_id(mra_msg); 2299 if (!cm_id_priv) 2300 return -EINVAL; 2301 2302 work->cm_event.private_data = &mra_msg->private_data; 2303 work->cm_event.param.mra_rcvd.service_timeout = 2304 cm_mra_get_service_timeout(mra_msg); 2305 timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + 2306 cm_convert_to_ms(cm_id_priv->av.packet_life_time); 2307 2308 spin_lock_irqsave(&cm_id_priv->lock, flags); 2309 switch (cm_id_priv->id.state) { 2310 case IB_CM_REQ_SENT: 2311 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || 2312 ib_modify_mad(cm_id_priv->av.port->mad_agent, 2313 cm_id_priv->msg, timeout)) 2314 goto out; 2315 cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; 2316 break; 2317 case IB_CM_REP_SENT: 2318 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || 2319 ib_modify_mad(cm_id_priv->av.port->mad_agent, 2320 cm_id_priv->msg, timeout)) 2321 goto out; 2322 cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; 2323 break; 2324 case IB_CM_ESTABLISHED: 2325 if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || 2326 cm_id_priv->id.lap_state != IB_CM_LAP_SENT || 2327 ib_modify_mad(cm_id_priv->av.port->mad_agent, 2328 cm_id_priv->msg, timeout)) 2329 goto out; 2330 cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; 2331 break; 2332 default: 2333 goto out; 2334 } 2335 2336 cm_id_priv->msg->context[1] = (void *) (unsigned long) 2337 cm_id_priv->id.state; 2338 ret = atomic_inc_and_test(&cm_id_priv->work_count); 2339 if (!ret) 2340 list_add_tail(&work->list, &cm_id_priv->work_list); 2341 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2342 2343 if (ret) 2344 cm_process_work(cm_id_priv, work); 2345 else 2346 cm_deref_id(cm_id_priv); 2347 return 0; 2348 out: 2349 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2350 cm_deref_id(cm_id_priv); 2351 return -EINVAL; 2352 } 2353 2354 static void cm_format_lap(struct cm_lap_msg *lap_msg, 2355 struct cm_id_private *cm_id_priv, 2356 struct ib_sa_path_rec *alternate_path, 2357 const void *private_data, 2358 u8 private_data_len) 2359 { 2360 cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, 2361 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); 2362 lap_msg->local_comm_id = cm_id_priv->id.local_id; 2363 lap_msg->remote_comm_id = cm_id_priv->id.remote_id; 2364 cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); 2365 /* todo: need remote CM response timeout */ 2366 cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); 2367 lap_msg->alt_local_lid = alternate_path->slid; 2368 lap_msg->alt_remote_lid = alternate_path->dlid; 2369 lap_msg->alt_local_gid = alternate_path->sgid; 2370 lap_msg->alt_remote_gid = alternate_path->dgid; 2371 cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); 2372 cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); 2373 lap_msg->alt_hop_limit = alternate_path->hop_limit; 2374 cm_lap_set_packet_rate(lap_msg, alternate_path->rate); 2375 cm_lap_set_sl(lap_msg, alternate_path->sl); 2376 cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ 2377 cm_lap_set_local_ack_timeout(lap_msg, 2378 min(31, alternate_path->packet_life_time + 1)); 2379 2380 if (private_data && private_data_len) 2381 memcpy(lap_msg->private_data, private_data, private_data_len); 2382 } 2383 2384 int ib_send_cm_lap(struct ib_cm_id *cm_id, 2385 struct ib_sa_path_rec *alternate_path, 2386 const void *private_data, 2387 u8 private_data_len) 2388 { 2389 struct cm_id_private *cm_id_priv; 2390 struct ib_mad_send_buf *msg; 2391 unsigned long flags; 2392 int ret; 2393 2394 if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) 2395 return -EINVAL; 2396 2397 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 2398 spin_lock_irqsave(&cm_id_priv->lock, flags); 2399 if (cm_id->state != IB_CM_ESTABLISHED || 2400 (cm_id->lap_state != IB_CM_LAP_UNINIT && 2401 cm_id->lap_state != IB_CM_LAP_IDLE)) { 2402 ret = -EINVAL; 2403 goto out; 2404 } 2405 2406 ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); 2407 if (ret) 2408 goto out; 2409 2410 ret = cm_alloc_msg(cm_id_priv, &msg); 2411 if (ret) 2412 goto out; 2413 2414 cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, 2415 alternate_path, private_data, private_data_len); 2416 msg->timeout_ms = cm_id_priv->timeout_ms; 2417 msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; 2418 2419 ret = ib_post_send_mad(msg, NULL); 2420 if (ret) { 2421 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2422 cm_free_msg(msg); 2423 return ret; 2424 } 2425 2426 cm_id->lap_state = IB_CM_LAP_SENT; 2427 cm_id_priv->msg = msg; 2428 2429 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2430 return ret; 2431 } 2432 EXPORT_SYMBOL(ib_send_cm_lap); 2433 2434 static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, 2435 struct ib_sa_path_rec *path, 2436 struct cm_lap_msg *lap_msg) 2437 { 2438 memset(path, 0, sizeof *path); 2439 path->dgid = lap_msg->alt_local_gid; 2440 path->sgid = lap_msg->alt_remote_gid; 2441 path->dlid = lap_msg->alt_local_lid; 2442 path->slid = lap_msg->alt_remote_lid; 2443 path->flow_label = cm_lap_get_flow_label(lap_msg); 2444 path->hop_limit = lap_msg->alt_hop_limit; 2445 path->traffic_class = cm_lap_get_traffic_class(lap_msg); 2446 path->reversible = 1; 2447 path->pkey = cm_id_priv->pkey; 2448 path->sl = cm_lap_get_sl(lap_msg); 2449 path->mtu_selector = IB_SA_EQ; 2450 path->mtu = cm_id_priv->path_mtu; 2451 path->rate_selector = IB_SA_EQ; 2452 path->rate = cm_lap_get_packet_rate(lap_msg); 2453 path->packet_life_time_selector = IB_SA_EQ; 2454 path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); 2455 path->packet_life_time -= (path->packet_life_time > 0); 2456 } 2457 2458 static int cm_lap_handler(struct cm_work *work) 2459 { 2460 struct cm_id_private *cm_id_priv; 2461 struct cm_lap_msg *lap_msg; 2462 struct ib_cm_lap_event_param *param; 2463 struct ib_mad_send_buf *msg = NULL; 2464 unsigned long flags; 2465 int ret; 2466 2467 /* todo: verify LAP request and send reject APR if invalid. */ 2468 lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; 2469 cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, 2470 lap_msg->local_comm_id); 2471 if (!cm_id_priv) 2472 return -EINVAL; 2473 2474 param = &work->cm_event.param.lap_rcvd; 2475 param->alternate_path = &work->path[0]; 2476 cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); 2477 work->cm_event.private_data = &lap_msg->private_data; 2478 2479 spin_lock_irqsave(&cm_id_priv->lock, flags); 2480 if (cm_id_priv->id.state != IB_CM_ESTABLISHED) 2481 goto unlock; 2482 2483 switch (cm_id_priv->id.lap_state) { 2484 case IB_CM_LAP_UNINIT: 2485 case IB_CM_LAP_IDLE: 2486 break; 2487 case IB_CM_MRA_LAP_SENT: 2488 if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) 2489 goto unlock; 2490 2491 cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, 2492 CM_MSG_RESPONSE_OTHER, 2493 cm_id_priv->service_timeout, 2494 cm_id_priv->private_data, 2495 cm_id_priv->private_data_len); 2496 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2497 2498 if (ib_post_send_mad(msg, NULL)) 2499 cm_free_msg(msg); 2500 goto deref; 2501 default: 2502 goto unlock; 2503 } 2504 2505 cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; 2506 cm_id_priv->tid = lap_msg->hdr.tid; 2507 cm_init_av_for_response(work->port, work->mad_recv_wc->wc, 2508 work->mad_recv_wc->recv_buf.grh, 2509 &cm_id_priv->av); 2510 cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); 2511 ret = atomic_inc_and_test(&cm_id_priv->work_count); 2512 if (!ret) 2513 list_add_tail(&work->list, &cm_id_priv->work_list); 2514 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2515 2516 if (ret) 2517 cm_process_work(cm_id_priv, work); 2518 else 2519 cm_deref_id(cm_id_priv); 2520 return 0; 2521 2522 unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2523 deref: cm_deref_id(cm_id_priv); 2524 return -EINVAL; 2525 } 2526 2527 static void cm_format_apr(struct cm_apr_msg *apr_msg, 2528 struct cm_id_private *cm_id_priv, 2529 enum ib_cm_apr_status status, 2530 void *info, 2531 u8 info_length, 2532 const void *private_data, 2533 u8 private_data_len) 2534 { 2535 cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); 2536 apr_msg->local_comm_id = cm_id_priv->id.local_id; 2537 apr_msg->remote_comm_id = cm_id_priv->id.remote_id; 2538 apr_msg->ap_status = (u8) status; 2539 2540 if (info && info_length) { 2541 apr_msg->info_length = info_length; 2542 memcpy(apr_msg->info, info, info_length); 2543 } 2544 2545 if (private_data && private_data_len) 2546 memcpy(apr_msg->private_data, private_data, private_data_len); 2547 } 2548 2549 int ib_send_cm_apr(struct ib_cm_id *cm_id, 2550 enum ib_cm_apr_status status, 2551 void *info, 2552 u8 info_length, 2553 const void *private_data, 2554 u8 private_data_len) 2555 { 2556 struct cm_id_private *cm_id_priv; 2557 struct ib_mad_send_buf *msg; 2558 unsigned long flags; 2559 int ret; 2560 2561 if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || 2562 (info && info_length > IB_CM_APR_INFO_LENGTH)) 2563 return -EINVAL; 2564 2565 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 2566 spin_lock_irqsave(&cm_id_priv->lock, flags); 2567 if (cm_id->state != IB_CM_ESTABLISHED || 2568 (cm_id->lap_state != IB_CM_LAP_RCVD && 2569 cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { 2570 ret = -EINVAL; 2571 goto out; 2572 } 2573 2574 ret = cm_alloc_msg(cm_id_priv, &msg); 2575 if (ret) 2576 goto out; 2577 2578 cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, 2579 info, info_length, private_data, private_data_len); 2580 ret = ib_post_send_mad(msg, NULL); 2581 if (ret) { 2582 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2583 cm_free_msg(msg); 2584 return ret; 2585 } 2586 2587 cm_id->lap_state = IB_CM_LAP_IDLE; 2588 out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2589 return ret; 2590 } 2591 EXPORT_SYMBOL(ib_send_cm_apr); 2592 2593 static int cm_apr_handler(struct cm_work *work) 2594 { 2595 struct cm_id_private *cm_id_priv; 2596 struct cm_apr_msg *apr_msg; 2597 unsigned long flags; 2598 int ret; 2599 2600 apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; 2601 cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, 2602 apr_msg->local_comm_id); 2603 if (!cm_id_priv) 2604 return -EINVAL; /* Unmatched reply. */ 2605 2606 work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; 2607 work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; 2608 work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; 2609 work->cm_event.private_data = &apr_msg->private_data; 2610 2611 spin_lock_irqsave(&cm_id_priv->lock, flags); 2612 if (cm_id_priv->id.state != IB_CM_ESTABLISHED || 2613 (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && 2614 cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { 2615 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2616 goto out; 2617 } 2618 cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; 2619 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 2620 cm_id_priv->msg = NULL; 2621 2622 ret = atomic_inc_and_test(&cm_id_priv->work_count); 2623 if (!ret) 2624 list_add_tail(&work->list, &cm_id_priv->work_list); 2625 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2626 2627 if (ret) 2628 cm_process_work(cm_id_priv, work); 2629 else 2630 cm_deref_id(cm_id_priv); 2631 return 0; 2632 out: 2633 cm_deref_id(cm_id_priv); 2634 return -EINVAL; 2635 } 2636 2637 static int cm_timewait_handler(struct cm_work *work) 2638 { 2639 struct cm_timewait_info *timewait_info; 2640 struct cm_id_private *cm_id_priv; 2641 int ret; 2642 2643 timewait_info = (struct cm_timewait_info *)work; 2644 spin_lock_irq(&cm.lock); 2645 list_del(&timewait_info->list); 2646 spin_unlock_irq(&cm.lock); 2647 2648 cm_id_priv = cm_acquire_id(timewait_info->work.local_id, 2649 timewait_info->work.remote_id); 2650 if (!cm_id_priv) 2651 return -EINVAL; 2652 2653 spin_lock_irq(&cm_id_priv->lock); 2654 if (cm_id_priv->id.state != IB_CM_TIMEWAIT || 2655 cm_id_priv->remote_qpn != timewait_info->remote_qpn) { 2656 spin_unlock_irq(&cm_id_priv->lock); 2657 goto out; 2658 } 2659 cm_id_priv->id.state = IB_CM_IDLE; 2660 ret = atomic_inc_and_test(&cm_id_priv->work_count); 2661 if (!ret) 2662 list_add_tail(&work->list, &cm_id_priv->work_list); 2663 spin_unlock_irq(&cm_id_priv->lock); 2664 2665 if (ret) 2666 cm_process_work(cm_id_priv, work); 2667 else 2668 cm_deref_id(cm_id_priv); 2669 return 0; 2670 out: 2671 cm_deref_id(cm_id_priv); 2672 return -EINVAL; 2673 } 2674 2675 static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, 2676 struct cm_id_private *cm_id_priv, 2677 struct ib_cm_sidr_req_param *param) 2678 { 2679 cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, 2680 cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); 2681 sidr_req_msg->request_id = cm_id_priv->id.local_id; 2682 sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); 2683 sidr_req_msg->service_id = param->service_id; 2684 2685 if (param->private_data && param->private_data_len) 2686 memcpy(sidr_req_msg->private_data, param->private_data, 2687 param->private_data_len); 2688 } 2689 2690 int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, 2691 struct ib_cm_sidr_req_param *param) 2692 { 2693 struct cm_id_private *cm_id_priv; 2694 struct ib_mad_send_buf *msg; 2695 unsigned long flags; 2696 int ret; 2697 2698 if (!param->path || (param->private_data && 2699 param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) 2700 return -EINVAL; 2701 2702 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 2703 ret = cm_init_av_by_path(param->path, &cm_id_priv->av); 2704 if (ret) 2705 goto out; 2706 2707 cm_id->service_id = param->service_id; 2708 cm_id->service_mask = __constant_cpu_to_be64(~0ULL); 2709 cm_id_priv->timeout_ms = param->timeout_ms; 2710 cm_id_priv->max_cm_retries = param->max_cm_retries; 2711 ret = cm_alloc_msg(cm_id_priv, &msg); 2712 if (ret) 2713 goto out; 2714 2715 cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, 2716 param); 2717 msg->timeout_ms = cm_id_priv->timeout_ms; 2718 msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; 2719 2720 spin_lock_irqsave(&cm_id_priv->lock, flags); 2721 if (cm_id->state == IB_CM_IDLE) 2722 ret = ib_post_send_mad(msg, NULL); 2723 else 2724 ret = -EINVAL; 2725 2726 if (ret) { 2727 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2728 cm_free_msg(msg); 2729 goto out; 2730 } 2731 cm_id->state = IB_CM_SIDR_REQ_SENT; 2732 cm_id_priv->msg = msg; 2733 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2734 out: 2735 return ret; 2736 } 2737 EXPORT_SYMBOL(ib_send_cm_sidr_req); 2738 2739 static void cm_format_sidr_req_event(struct cm_work *work, 2740 struct ib_cm_id *listen_id) 2741 { 2742 struct cm_sidr_req_msg *sidr_req_msg; 2743 struct ib_cm_sidr_req_event_param *param; 2744 2745 sidr_req_msg = (struct cm_sidr_req_msg *) 2746 work->mad_recv_wc->recv_buf.mad; 2747 param = &work->cm_event.param.sidr_req_rcvd; 2748 param->pkey = __be16_to_cpu(sidr_req_msg->pkey); 2749 param->listen_id = listen_id; 2750 param->port = work->port->port_num; 2751 work->cm_event.private_data = &sidr_req_msg->private_data; 2752 } 2753 2754 static int cm_sidr_req_handler(struct cm_work *work) 2755 { 2756 struct ib_cm_id *cm_id; 2757 struct cm_id_private *cm_id_priv, *cur_cm_id_priv; 2758 struct cm_sidr_req_msg *sidr_req_msg; 2759 struct ib_wc *wc; 2760 unsigned long flags; 2761 2762 cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); 2763 if (IS_ERR(cm_id)) 2764 return PTR_ERR(cm_id); 2765 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 2766 2767 /* Record SGID/SLID and request ID for lookup. */ 2768 sidr_req_msg = (struct cm_sidr_req_msg *) 2769 work->mad_recv_wc->recv_buf.mad; 2770 wc = work->mad_recv_wc->wc; 2771 cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); 2772 cm_id_priv->av.dgid.global.interface_id = 0; 2773 cm_init_av_for_response(work->port, work->mad_recv_wc->wc, 2774 work->mad_recv_wc->recv_buf.grh, 2775 &cm_id_priv->av); 2776 cm_id_priv->id.remote_id = sidr_req_msg->request_id; 2777 cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; 2778 cm_id_priv->tid = sidr_req_msg->hdr.tid; 2779 atomic_inc(&cm_id_priv->work_count); 2780 2781 spin_lock_irqsave(&cm.lock, flags); 2782 cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); 2783 if (cur_cm_id_priv) { 2784 spin_unlock_irqrestore(&cm.lock, flags); 2785 goto out; /* Duplicate message. */ 2786 } 2787 cur_cm_id_priv = cm_find_listen(cm_id->device, 2788 sidr_req_msg->service_id, 2789 sidr_req_msg->private_data); 2790 if (!cur_cm_id_priv) { 2791 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); 2792 spin_unlock_irqrestore(&cm.lock, flags); 2793 /* todo: reply with no match */ 2794 goto out; /* No match. */ 2795 } 2796 atomic_inc(&cur_cm_id_priv->refcount); 2797 spin_unlock_irqrestore(&cm.lock, flags); 2798 2799 cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; 2800 cm_id_priv->id.context = cur_cm_id_priv->id.context; 2801 cm_id_priv->id.service_id = sidr_req_msg->service_id; 2802 cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); 2803 2804 cm_format_sidr_req_event(work, &cur_cm_id_priv->id); 2805 cm_process_work(cm_id_priv, work); 2806 cm_deref_id(cur_cm_id_priv); 2807 return 0; 2808 out: 2809 ib_destroy_cm_id(&cm_id_priv->id); 2810 return -EINVAL; 2811 } 2812 2813 static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, 2814 struct cm_id_private *cm_id_priv, 2815 struct ib_cm_sidr_rep_param *param) 2816 { 2817 cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, 2818 cm_id_priv->tid); 2819 sidr_rep_msg->request_id = cm_id_priv->id.remote_id; 2820 sidr_rep_msg->status = param->status; 2821 cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); 2822 sidr_rep_msg->service_id = cm_id_priv->id.service_id; 2823 sidr_rep_msg->qkey = cpu_to_be32(param->qkey); 2824 2825 if (param->info && param->info_length) 2826 memcpy(sidr_rep_msg->info, param->info, param->info_length); 2827 2828 if (param->private_data && param->private_data_len) 2829 memcpy(sidr_rep_msg->private_data, param->private_data, 2830 param->private_data_len); 2831 } 2832 2833 int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, 2834 struct ib_cm_sidr_rep_param *param) 2835 { 2836 struct cm_id_private *cm_id_priv; 2837 struct ib_mad_send_buf *msg; 2838 unsigned long flags; 2839 int ret; 2840 2841 if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || 2842 (param->private_data && 2843 param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) 2844 return -EINVAL; 2845 2846 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 2847 spin_lock_irqsave(&cm_id_priv->lock, flags); 2848 if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { 2849 ret = -EINVAL; 2850 goto error; 2851 } 2852 2853 ret = cm_alloc_msg(cm_id_priv, &msg); 2854 if (ret) 2855 goto error; 2856 2857 cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, 2858 param); 2859 ret = ib_post_send_mad(msg, NULL); 2860 if (ret) { 2861 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2862 cm_free_msg(msg); 2863 return ret; 2864 } 2865 cm_id->state = IB_CM_IDLE; 2866 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2867 2868 spin_lock_irqsave(&cm.lock, flags); 2869 rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); 2870 spin_unlock_irqrestore(&cm.lock, flags); 2871 return 0; 2872 2873 error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2874 return ret; 2875 } 2876 EXPORT_SYMBOL(ib_send_cm_sidr_rep); 2877 2878 static void cm_format_sidr_rep_event(struct cm_work *work) 2879 { 2880 struct cm_sidr_rep_msg *sidr_rep_msg; 2881 struct ib_cm_sidr_rep_event_param *param; 2882 2883 sidr_rep_msg = (struct cm_sidr_rep_msg *) 2884 work->mad_recv_wc->recv_buf.mad; 2885 param = &work->cm_event.param.sidr_rep_rcvd; 2886 param->status = sidr_rep_msg->status; 2887 param->qkey = be32_to_cpu(sidr_rep_msg->qkey); 2888 param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); 2889 param->info = &sidr_rep_msg->info; 2890 param->info_len = sidr_rep_msg->info_length; 2891 work->cm_event.private_data = &sidr_rep_msg->private_data; 2892 } 2893 2894 static int cm_sidr_rep_handler(struct cm_work *work) 2895 { 2896 struct cm_sidr_rep_msg *sidr_rep_msg; 2897 struct cm_id_private *cm_id_priv; 2898 unsigned long flags; 2899 2900 sidr_rep_msg = (struct cm_sidr_rep_msg *) 2901 work->mad_recv_wc->recv_buf.mad; 2902 cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); 2903 if (!cm_id_priv) 2904 return -EINVAL; /* Unmatched reply. */ 2905 2906 spin_lock_irqsave(&cm_id_priv->lock, flags); 2907 if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { 2908 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2909 goto out; 2910 } 2911 cm_id_priv->id.state = IB_CM_IDLE; 2912 ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); 2913 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2914 2915 cm_format_sidr_rep_event(work); 2916 cm_process_work(cm_id_priv, work); 2917 return 0; 2918 out: 2919 cm_deref_id(cm_id_priv); 2920 return -EINVAL; 2921 } 2922 2923 static void cm_process_send_error(struct ib_mad_send_buf *msg, 2924 enum ib_wc_status wc_status) 2925 { 2926 struct cm_id_private *cm_id_priv; 2927 struct ib_cm_event cm_event; 2928 enum ib_cm_state state; 2929 unsigned long flags; 2930 int ret; 2931 2932 memset(&cm_event, 0, sizeof cm_event); 2933 cm_id_priv = msg->context[0]; 2934 2935 /* Discard old sends or ones without a response. */ 2936 spin_lock_irqsave(&cm_id_priv->lock, flags); 2937 state = (enum ib_cm_state) (unsigned long) msg->context[1]; 2938 if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) 2939 goto discard; 2940 2941 switch (state) { 2942 case IB_CM_REQ_SENT: 2943 case IB_CM_MRA_REQ_RCVD: 2944 cm_reset_to_idle(cm_id_priv); 2945 cm_event.event = IB_CM_REQ_ERROR; 2946 break; 2947 case IB_CM_REP_SENT: 2948 case IB_CM_MRA_REP_RCVD: 2949 cm_reset_to_idle(cm_id_priv); 2950 cm_event.event = IB_CM_REP_ERROR; 2951 break; 2952 case IB_CM_DREQ_SENT: 2953 cm_enter_timewait(cm_id_priv); 2954 cm_event.event = IB_CM_DREQ_ERROR; 2955 break; 2956 case IB_CM_SIDR_REQ_SENT: 2957 cm_id_priv->id.state = IB_CM_IDLE; 2958 cm_event.event = IB_CM_SIDR_REQ_ERROR; 2959 break; 2960 default: 2961 goto discard; 2962 } 2963 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2964 cm_event.param.send_status = wc_status; 2965 2966 /* No other events can occur on the cm_id at this point. */ 2967 ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); 2968 cm_free_msg(msg); 2969 if (ret) 2970 ib_destroy_cm_id(&cm_id_priv->id); 2971 return; 2972 discard: 2973 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 2974 cm_free_msg(msg); 2975 } 2976 2977 static void cm_send_handler(struct ib_mad_agent *mad_agent, 2978 struct ib_mad_send_wc *mad_send_wc) 2979 { 2980 struct ib_mad_send_buf *msg = mad_send_wc->send_buf; 2981 2982 switch (mad_send_wc->status) { 2983 case IB_WC_SUCCESS: 2984 case IB_WC_WR_FLUSH_ERR: 2985 cm_free_msg(msg); 2986 break; 2987 default: 2988 if (msg->context[0] && msg->context[1]) 2989 cm_process_send_error(msg, mad_send_wc->status); 2990 else 2991 cm_free_msg(msg); 2992 break; 2993 } 2994 } 2995 2996 static void cm_work_handler(struct work_struct *_work) 2997 { 2998 struct cm_work *work = container_of(_work, struct cm_work, work.work); 2999 int ret; 3000 3001 switch (work->cm_event.event) { 3002 case IB_CM_REQ_RECEIVED: 3003 ret = cm_req_handler(work); 3004 break; 3005 case IB_CM_MRA_RECEIVED: 3006 ret = cm_mra_handler(work); 3007 break; 3008 case IB_CM_REJ_RECEIVED: 3009 ret = cm_rej_handler(work); 3010 break; 3011 case IB_CM_REP_RECEIVED: 3012 ret = cm_rep_handler(work); 3013 break; 3014 case IB_CM_RTU_RECEIVED: 3015 ret = cm_rtu_handler(work); 3016 break; 3017 case IB_CM_USER_ESTABLISHED: 3018 ret = cm_establish_handler(work); 3019 break; 3020 case IB_CM_DREQ_RECEIVED: 3021 ret = cm_dreq_handler(work); 3022 break; 3023 case IB_CM_DREP_RECEIVED: 3024 ret = cm_drep_handler(work); 3025 break; 3026 case IB_CM_SIDR_REQ_RECEIVED: 3027 ret = cm_sidr_req_handler(work); 3028 break; 3029 case IB_CM_SIDR_REP_RECEIVED: 3030 ret = cm_sidr_rep_handler(work); 3031 break; 3032 case IB_CM_LAP_RECEIVED: 3033 ret = cm_lap_handler(work); 3034 break; 3035 case IB_CM_APR_RECEIVED: 3036 ret = cm_apr_handler(work); 3037 break; 3038 case IB_CM_TIMEWAIT_EXIT: 3039 ret = cm_timewait_handler(work); 3040 break; 3041 default: 3042 ret = -EINVAL; 3043 break; 3044 } 3045 if (ret) 3046 cm_free_work(work); 3047 } 3048 3049 static int cm_establish(struct ib_cm_id *cm_id) 3050 { 3051 struct cm_id_private *cm_id_priv; 3052 struct cm_work *work; 3053 unsigned long flags; 3054 int ret = 0; 3055 3056 work = kmalloc(sizeof *work, GFP_ATOMIC); 3057 if (!work) 3058 return -ENOMEM; 3059 3060 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 3061 spin_lock_irqsave(&cm_id_priv->lock, flags); 3062 switch (cm_id->state) 3063 { 3064 case IB_CM_REP_SENT: 3065 case IB_CM_MRA_REP_RCVD: 3066 cm_id->state = IB_CM_ESTABLISHED; 3067 break; 3068 case IB_CM_ESTABLISHED: 3069 ret = -EISCONN; 3070 break; 3071 default: 3072 ret = -EINVAL; 3073 break; 3074 } 3075 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 3076 3077 if (ret) { 3078 kfree(work); 3079 goto out; 3080 } 3081 3082 /* 3083 * The CM worker thread may try to destroy the cm_id before it 3084 * can execute this work item. To prevent potential deadlock, 3085 * we need to find the cm_id once we're in the context of the 3086 * worker thread, rather than holding a reference on it. 3087 */ 3088 INIT_DELAYED_WORK(&work->work, cm_work_handler); 3089 work->local_id = cm_id->local_id; 3090 work->remote_id = cm_id->remote_id; 3091 work->mad_recv_wc = NULL; 3092 work->cm_event.event = IB_CM_USER_ESTABLISHED; 3093 queue_delayed_work(cm.wq, &work->work, 0); 3094 out: 3095 return ret; 3096 } 3097 3098 static int cm_migrate(struct ib_cm_id *cm_id) 3099 { 3100 struct cm_id_private *cm_id_priv; 3101 unsigned long flags; 3102 int ret = 0; 3103 3104 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 3105 spin_lock_irqsave(&cm_id_priv->lock, flags); 3106 if (cm_id->state == IB_CM_ESTABLISHED && 3107 (cm_id->lap_state == IB_CM_LAP_UNINIT || 3108 cm_id->lap_state == IB_CM_LAP_IDLE)) { 3109 cm_id->lap_state = IB_CM_LAP_IDLE; 3110 cm_id_priv->av = cm_id_priv->alt_av; 3111 } else 3112 ret = -EINVAL; 3113 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 3114 3115 return ret; 3116 } 3117 3118 int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) 3119 { 3120 int ret; 3121 3122 switch (event) { 3123 case IB_EVENT_COMM_EST: 3124 ret = cm_establish(cm_id); 3125 break; 3126 case IB_EVENT_PATH_MIG: 3127 ret = cm_migrate(cm_id); 3128 break; 3129 default: 3130 ret = -EINVAL; 3131 } 3132 return ret; 3133 } 3134 EXPORT_SYMBOL(ib_cm_notify); 3135 3136 static void cm_recv_handler(struct ib_mad_agent *mad_agent, 3137 struct ib_mad_recv_wc *mad_recv_wc) 3138 { 3139 struct cm_work *work; 3140 enum ib_cm_event_type event; 3141 int paths = 0; 3142 3143 switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { 3144 case CM_REQ_ATTR_ID: 3145 paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> 3146 alt_local_lid != 0); 3147 event = IB_CM_REQ_RECEIVED; 3148 break; 3149 case CM_MRA_ATTR_ID: 3150 event = IB_CM_MRA_RECEIVED; 3151 break; 3152 case CM_REJ_ATTR_ID: 3153 event = IB_CM_REJ_RECEIVED; 3154 break; 3155 case CM_REP_ATTR_ID: 3156 event = IB_CM_REP_RECEIVED; 3157 break; 3158 case CM_RTU_ATTR_ID: 3159 event = IB_CM_RTU_RECEIVED; 3160 break; 3161 case CM_DREQ_ATTR_ID: 3162 event = IB_CM_DREQ_RECEIVED; 3163 break; 3164 case CM_DREP_ATTR_ID: 3165 event = IB_CM_DREP_RECEIVED; 3166 break; 3167 case CM_SIDR_REQ_ATTR_ID: 3168 event = IB_CM_SIDR_REQ_RECEIVED; 3169 break; 3170 case CM_SIDR_REP_ATTR_ID: 3171 event = IB_CM_SIDR_REP_RECEIVED; 3172 break; 3173 case CM_LAP_ATTR_ID: 3174 paths = 1; 3175 event = IB_CM_LAP_RECEIVED; 3176 break; 3177 case CM_APR_ATTR_ID: 3178 event = IB_CM_APR_RECEIVED; 3179 break; 3180 default: 3181 ib_free_recv_mad(mad_recv_wc); 3182 return; 3183 } 3184 3185 work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, 3186 GFP_KERNEL); 3187 if (!work) { 3188 ib_free_recv_mad(mad_recv_wc); 3189 return; 3190 } 3191 3192 INIT_DELAYED_WORK(&work->work, cm_work_handler); 3193 work->cm_event.event = event; 3194 work->mad_recv_wc = mad_recv_wc; 3195 work->port = (struct cm_port *)mad_agent->context; 3196 queue_delayed_work(cm.wq, &work->work, 0); 3197 } 3198 3199 static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, 3200 struct ib_qp_attr *qp_attr, 3201 int *qp_attr_mask) 3202 { 3203 unsigned long flags; 3204 int ret; 3205 3206 spin_lock_irqsave(&cm_id_priv->lock, flags); 3207 switch (cm_id_priv->id.state) { 3208 case IB_CM_REQ_SENT: 3209 case IB_CM_MRA_REQ_RCVD: 3210 case IB_CM_REQ_RCVD: 3211 case IB_CM_MRA_REQ_SENT: 3212 case IB_CM_REP_RCVD: 3213 case IB_CM_MRA_REP_SENT: 3214 case IB_CM_REP_SENT: 3215 case IB_CM_MRA_REP_RCVD: 3216 case IB_CM_ESTABLISHED: 3217 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | 3218 IB_QP_PKEY_INDEX | IB_QP_PORT; 3219 qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; 3220 if (cm_id_priv->responder_resources) 3221 qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | 3222 IB_ACCESS_REMOTE_ATOMIC; 3223 qp_attr->pkey_index = cm_id_priv->av.pkey_index; 3224 qp_attr->port_num = cm_id_priv->av.port->port_num; 3225 ret = 0; 3226 break; 3227 default: 3228 ret = -EINVAL; 3229 break; 3230 } 3231 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 3232 return ret; 3233 } 3234 3235 static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, 3236 struct ib_qp_attr *qp_attr, 3237 int *qp_attr_mask) 3238 { 3239 unsigned long flags; 3240 int ret; 3241 3242 spin_lock_irqsave(&cm_id_priv->lock, flags); 3243 switch (cm_id_priv->id.state) { 3244 case IB_CM_REQ_RCVD: 3245 case IB_CM_MRA_REQ_SENT: 3246 case IB_CM_REP_RCVD: 3247 case IB_CM_MRA_REP_SENT: 3248 case IB_CM_REP_SENT: 3249 case IB_CM_MRA_REP_RCVD: 3250 case IB_CM_ESTABLISHED: 3251 *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | 3252 IB_QP_DEST_QPN | IB_QP_RQ_PSN; 3253 qp_attr->ah_attr = cm_id_priv->av.ah_attr; 3254 qp_attr->path_mtu = cm_id_priv->path_mtu; 3255 qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); 3256 qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); 3257 if (cm_id_priv->qp_type == IB_QPT_RC) { 3258 *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | 3259 IB_QP_MIN_RNR_TIMER; 3260 qp_attr->max_dest_rd_atomic = 3261 cm_id_priv->responder_resources; 3262 qp_attr->min_rnr_timer = 0; 3263 } 3264 if (cm_id_priv->alt_av.ah_attr.dlid) { 3265 *qp_attr_mask |= IB_QP_ALT_PATH; 3266 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; 3267 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; 3268 qp_attr->alt_timeout = 3269 cm_id_priv->alt_av.packet_life_time + 1; 3270 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; 3271 } 3272 ret = 0; 3273 break; 3274 default: 3275 ret = -EINVAL; 3276 break; 3277 } 3278 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 3279 return ret; 3280 } 3281 3282 static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, 3283 struct ib_qp_attr *qp_attr, 3284 int *qp_attr_mask) 3285 { 3286 unsigned long flags; 3287 int ret; 3288 3289 spin_lock_irqsave(&cm_id_priv->lock, flags); 3290 switch (cm_id_priv->id.state) { 3291 /* Allow transition to RTS before sending REP */ 3292 case IB_CM_REQ_RCVD: 3293 case IB_CM_MRA_REQ_SENT: 3294 3295 case IB_CM_REP_RCVD: 3296 case IB_CM_MRA_REP_SENT: 3297 case IB_CM_REP_SENT: 3298 case IB_CM_MRA_REP_RCVD: 3299 case IB_CM_ESTABLISHED: 3300 if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { 3301 *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; 3302 qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); 3303 if (cm_id_priv->qp_type == IB_QPT_RC) { 3304 *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | 3305 IB_QP_RNR_RETRY | 3306 IB_QP_MAX_QP_RD_ATOMIC; 3307 qp_attr->timeout = 3308 cm_id_priv->av.packet_life_time + 1; 3309 qp_attr->retry_cnt = cm_id_priv->retry_count; 3310 qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; 3311 qp_attr->max_rd_atomic = 3312 cm_id_priv->initiator_depth; 3313 } 3314 if (cm_id_priv->alt_av.ah_attr.dlid) { 3315 *qp_attr_mask |= IB_QP_PATH_MIG_STATE; 3316 qp_attr->path_mig_state = IB_MIG_REARM; 3317 } 3318 } else { 3319 *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; 3320 qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; 3321 qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; 3322 qp_attr->alt_timeout = 3323 cm_id_priv->alt_av.packet_life_time + 1; 3324 qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; 3325 qp_attr->path_mig_state = IB_MIG_REARM; 3326 } 3327 ret = 0; 3328 break; 3329 default: 3330 ret = -EINVAL; 3331 break; 3332 } 3333 spin_unlock_irqrestore(&cm_id_priv->lock, flags); 3334 return ret; 3335 } 3336 3337 int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, 3338 struct ib_qp_attr *qp_attr, 3339 int *qp_attr_mask) 3340 { 3341 struct cm_id_private *cm_id_priv; 3342 int ret; 3343 3344 cm_id_priv = container_of(cm_id, struct cm_id_private, id); 3345 switch (qp_attr->qp_state) { 3346 case IB_QPS_INIT: 3347 ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); 3348 break; 3349 case IB_QPS_RTR: 3350 ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); 3351 break; 3352 case IB_QPS_RTS: 3353 ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); 3354 break; 3355 default: 3356 ret = -EINVAL; 3357 break; 3358 } 3359 return ret; 3360 } 3361 EXPORT_SYMBOL(ib_cm_init_qp_attr); 3362 3363 static void cm_add_one(struct ib_device *device) 3364 { 3365 struct cm_device *cm_dev; 3366 struct cm_port *port; 3367 struct ib_mad_reg_req reg_req = { 3368 .mgmt_class = IB_MGMT_CLASS_CM, 3369 .mgmt_class_version = IB_CM_CLASS_VERSION 3370 }; 3371 struct ib_port_modify port_modify = { 3372 .set_port_cap_mask = IB_PORT_CM_SUP 3373 }; 3374 unsigned long flags; 3375 int ret; 3376 u8 i; 3377 3378 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 3379 return; 3380 3381 cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * 3382 device->phys_port_cnt, GFP_KERNEL); 3383 if (!cm_dev) 3384 return; 3385 3386 cm_dev->device = device; 3387 3388 set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); 3389 for (i = 1; i <= device->phys_port_cnt; i++) { 3390 port = &cm_dev->port[i-1]; 3391 port->cm_dev = cm_dev; 3392 port->port_num = i; 3393 port->mad_agent = ib_register_mad_agent(device, i, 3394 IB_QPT_GSI, 3395 ®_req, 3396 0, 3397 cm_send_handler, 3398 cm_recv_handler, 3399 port); 3400 if (IS_ERR(port->mad_agent)) 3401 goto error1; 3402 3403 ret = ib_modify_port(device, i, 0, &port_modify); 3404 if (ret) 3405 goto error2; 3406 } 3407 ib_set_client_data(device, &cm_client, cm_dev); 3408 3409 write_lock_irqsave(&cm.device_lock, flags); 3410 list_add_tail(&cm_dev->list, &cm.device_list); 3411 write_unlock_irqrestore(&cm.device_lock, flags); 3412 return; 3413 3414 error2: 3415 ib_unregister_mad_agent(port->mad_agent); 3416 error1: 3417 port_modify.set_port_cap_mask = 0; 3418 port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; 3419 while (--i) { 3420 port = &cm_dev->port[i-1]; 3421 ib_modify_port(device, port->port_num, 0, &port_modify); 3422 ib_unregister_mad_agent(port->mad_agent); 3423 } 3424 kfree(cm_dev); 3425 } 3426 3427 static void cm_remove_one(struct ib_device *device) 3428 { 3429 struct cm_device *cm_dev; 3430 struct cm_port *port; 3431 struct ib_port_modify port_modify = { 3432 .clr_port_cap_mask = IB_PORT_CM_SUP 3433 }; 3434 unsigned long flags; 3435 int i; 3436 3437 cm_dev = ib_get_client_data(device, &cm_client); 3438 if (!cm_dev) 3439 return; 3440 3441 write_lock_irqsave(&cm.device_lock, flags); 3442 list_del(&cm_dev->list); 3443 write_unlock_irqrestore(&cm.device_lock, flags); 3444 3445 for (i = 1; i <= device->phys_port_cnt; i++) { 3446 port = &cm_dev->port[i-1]; 3447 ib_modify_port(device, port->port_num, 0, &port_modify); 3448 ib_unregister_mad_agent(port->mad_agent); 3449 } 3450 kfree(cm_dev); 3451 } 3452 3453 static int __init ib_cm_init(void) 3454 { 3455 int ret; 3456 3457 memset(&cm, 0, sizeof cm); 3458 INIT_LIST_HEAD(&cm.device_list); 3459 rwlock_init(&cm.device_lock); 3460 spin_lock_init(&cm.lock); 3461 cm.listen_service_table = RB_ROOT; 3462 cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); 3463 cm.remote_id_table = RB_ROOT; 3464 cm.remote_qp_table = RB_ROOT; 3465 cm.remote_sidr_table = RB_ROOT; 3466 idr_init(&cm.local_id_table); 3467 get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); 3468 idr_pre_get(&cm.local_id_table, GFP_KERNEL); 3469 INIT_LIST_HEAD(&cm.timewait_list); 3470 3471 cm.wq = create_workqueue("ib_cm"); 3472 if (!cm.wq) 3473 return -ENOMEM; 3474 3475 ret = ib_register_client(&cm_client); 3476 if (ret) 3477 goto error; 3478 3479 return 0; 3480 error: 3481 destroy_workqueue(cm.wq); 3482 return ret; 3483 } 3484 3485 static void __exit ib_cm_cleanup(void) 3486 { 3487 struct cm_timewait_info *timewait_info, *tmp; 3488 3489 spin_lock_irq(&cm.lock); 3490 list_for_each_entry(timewait_info, &cm.timewait_list, list) 3491 cancel_delayed_work(&timewait_info->work.work); 3492 spin_unlock_irq(&cm.lock); 3493 3494 destroy_workqueue(cm.wq); 3495 3496 list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { 3497 list_del(&timewait_info->list); 3498 kfree(timewait_info); 3499 } 3500 3501 ib_unregister_client(&cm_client); 3502 idr_destroy(&cm.local_id_table); 3503 } 3504 3505 module_init(ib_cm_init); 3506 module_exit(ib_cm_cleanup); 3507 3508