1/* 2 3 * Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved. 4 * Copyright (c) 2005 Intel Corporation. All rights reserved. 5 * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved. 6 * Copyright (c) 2009 HNR Consulting. All rights reserved. 7 * 8 * This software is available to you under a choice of one of two 9 * licenses. You may choose to be licensed under the terms of the GNU 10 * General Public License (GPL) Version 2, available from the file 11 * COPYING in the main directory of this source tree, or the 12 * OpenIB.org BSD license below: 13 * 14 * Redistribution and use in source and binary forms, with or 15 * without modification, are permitted provided that the following 16 * conditions are met: 17 * 18 * - Redistributions of source code must retain the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer. 21 * 22 * - Redistributions in binary form must reproduce the above 23 * copyright notice, this list of conditions and the following 24 * disclaimer in the documentation and/or other materials 25 * provided with the distribution. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 34 * SOFTWARE. 35 * 36 37 #include <linux/dma-mapping.h> 38 #include <rdma/ib_cache.h> 39 */ 40#include <linux/gfp.h> 41#include <linux/workqueue.h> 42#include <linux/bitops.h> 43 44#include <rdma/ib_cache.h> 45 46#include "mad_priv.h" 47#include "mad_rmpp.h" 48/* 49 #include "mad_rmpp.h" 50 */ 51#include "smi.h" 52#include "agent.h" 53/* 54 MODULE_LICENSE("Dual BSD/GPL"); 55 MODULE_DESCRIPTION("kernel IB MAD API"); 56 MODULE_AUTHOR("Hal Rosenstock"); 57 MODULE_AUTHOR("Sean Hefty"); 58 */ 59int mad_sendq_size = IB_MAD_QP_SEND_SIZE; 60int mad_recvq_size = IB_MAD_QP_RECV_SIZE; 61/* 62 module_param_named(send_queue_size, mad_sendq_size, int, 0444); 63 MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests"); 64 module_param_named(recv_queue_size, mad_recvq_size, int, 0444); 65 MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests"); 66 67 static struct kmem_cache *ib_mad_cache; 68 */ 69static struct list_head ib_mad_port_list; 70 71static u32 ib_mad_client_id = 0; 72/* 73 Port list lock 74 static spinlock_t ib_mad_port_list_lock; 75 76 77 Forward declarations*/ 78static int method_in_use(struct ib_mad_mgmt_method_table **method, 79 struct ib_mad_reg_req *mad_reg_req); 80/* 81 static void remove_mad_reg_req(struct ib_mad_agent_private *priv); 82 */ 83static struct ib_mad_agent_private *find_mad_agent( 84 struct ib_mad_port_private *port_priv, struct ib_mad *mad); 85/* 86 static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, 87 struct ib_mad_private *mad); 88 static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); 89 static void timeout_sends(struct work_struct *work); 90 static void local_completions(struct work_struct *work); 91 92 static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, 93 struct ib_mad_agent_private *agent_priv, u8 mgmt_class); 94 95 static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, 96 struct ib_mad_agent_private *agent_priv); 97 98 99 * Returns a ib_mad_port_private structure or NULL for a device/port 100 * Assumes ib_mad_port_list_lock is being held 101 */ 102static inline struct ib_mad_port_private * 103__ib_get_mad_port(struct ib_device *device, int port_num) { 104 struct ib_mad_port_private *entry; 105 106 list_for_each_entry(entry, &ib_mad_port_list, port_list) 107 { 108 if (entry->device == device && entry->port_num == port_num) 109 return entry; 110 } 111 return NULL; 112} 113/* 114 115 * Wrapper function to return a ib_mad_port_private structure or NULL 116 * for a device/port 117 */ 118static inline struct ib_mad_port_private * 119ib_get_mad_port(struct ib_device *device, int port_num) { 120 struct ib_mad_port_private *entry; 121 /*unsigned long flags;*/ 122 123 /*spin_lock_irqsave(&ib_mad_port_list_lock, flags);*/ 124 entry = __ib_get_mad_port(device, port_num); 125 /*spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);*/ 126 127 return entry; 128} 129 130static inline u8 convert_mgmt_class(u8 mgmt_class) { 131 /*Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0*/ 132 return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? 0 : mgmt_class; 133} 134 135static int get_spl_qp_index(enum ib_qp_type qp_type) { 136 switch (qp_type) { 137 case IB_QPT_SMI: 138 return 0; 139 case IB_QPT_GSI: 140 return 1; 141 default: 142 return -1; 143 } 144} 145 146static int vendor_class_index(u8 mgmt_class) { 147 return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; 148} 149 150static int is_vendor_class(u8 mgmt_class) { 151 if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) 152 || (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) 153 return 0; 154 return 1; 155} 156 157static inline int is_vendor_oui(u8 *oui) { 158 if (oui[0] || oui[1] || oui[2]) 159 return 1; 160 return 0; 161} 162 163static inline int is_vendor_method_in_use( 164 struct ib_mad_mgmt_vendor_class *vendor_class, 165 struct ib_mad_reg_req *mad_reg_req) { 166 struct ib_mad_mgmt_method_table *method; 167 int i; 168 169 for (i = 0; i < MAX_MGMT_OUI; i++) { 170 if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { 171 method = vendor_class->method_table[i]; 172 if (method) { 173 if (method_in_use(&method, mad_reg_req)) 174 return 1; 175 else 176 break; 177 } 178 } 179 } 180 return 0; 181} 182 183int ib_response_mad(struct ib_mad *mad) { 184 return ((mad->mad_hdr.method & IB_MGMT_METHOD_RESP) 185 || (mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) 186 || ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_BM) 187 && (mad->mad_hdr.attr_mod & IB_BM_ATTR_MOD_RESP))); 188} 189/* 190 EXPORT_SYMBOL(ib_response_mad); 191 192 static void timeout_callback(unsigned long data) 193 { 194 struct ib_mad_agent_private *mad_agent_priv = 195 (struct ib_mad_agent_private *) data; 196 197 queue_work(mad_agent_priv->qp_info->port_priv->wq, 198 &mad_agent_priv->timeout_work); 199 } 200 201 202 * ib_register_mad_agent - Register to send/receive MADs 203 */ 204struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, 205 u8 port_num, enum ib_qp_type qp_type, 206 struct ib_mad_reg_req *mad_reg_req, u8 rmpp_version, 207 ib_mad_send_handler send_handler, ib_mad_recv_handler recv_handler, 208 void *context) { 209 struct ib_mad_port_private *port_priv; 210 struct ib_mad_agent *ret = ERR_PTR(-EINVAL); 211 struct ib_mad_agent_private *mad_agent_priv; 212 struct ib_mad_reg_req *reg_req = NULL; 213 /*struct ib_mad_mgmt_class_table *class; 214 struct ib_mad_mgmt_vendor_class_table *vendor; 215 struct ib_mad_mgmt_vendor_class *vendor_class; 216 struct ib_mad_mgmt_method_table *method;*/ 217 int /*ret2,*/qpn; 218 /*unsigned long flags; 219 u8 mgmt_class, vclass;*/ 220 221 /*Validate parameters*/ 222 qpn = get_spl_qp_index(qp_type); 223 if (qpn == -1) 224 goto error1; 225 226 if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) 227 goto error1; 228 229 /*Validate MAD registration request if supplied*/ 230 if (mad_reg_req) { 231 assert(!"NYI"); 232 /*if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) 233 goto error1; 234 if (!recv_handler) 235 goto error1; 236 if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { 237 238 * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only 239 * one in this range currently allowed 240 241 if (mad_reg_req->mgmt_class != 242 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 243 goto error1; 244 } else if (mad_reg_req->mgmt_class == 0) { 245 246 * Class 0 is reserved in IBA and is used for 247 * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE 248 249 goto error1; 250 } else if (is_vendor_class(mad_reg_req->mgmt_class)) { 251 252 * If class is in "new" vendor range, 253 * ensure supplied OUI is not zero 254 255 if (!is_vendor_oui(mad_reg_req->oui)) 256 goto error1; 257 } 258 Make sure class supplied is consistent with RMPP 259 if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { 260 if (rmpp_version) 261 goto error1; 262 } 263 Make sure class supplied is consistent with QP type 264 if (qp_type == IB_QPT_SMI) { 265 if ((mad_reg_req->mgmt_class != 266 IB_MGMT_CLASS_SUBN_LID_ROUTED) && (mad_reg_req->mgmt_class != 267 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) 268 goto error1; 269 } else { 270 if ((mad_reg_req->mgmt_class == 271 IB_MGMT_CLASS_SUBN_LID_ROUTED) || (mad_reg_req->mgmt_class == 272 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) 273 goto error1; 274 }*/ 275 } else { 276 /*No registration request supplied*/ 277 if (!send_handler) 278 goto error1; 279 } 280 281 /*Validate device and port*/ 282 port_priv = ib_get_mad_port(device, port_num); 283 if (!port_priv) { 284 ret = ERR_PTR(-ENODEV); 285 goto error1; 286 } 287 288 /*Allocate structures*/ 289 mad_agent_priv = calloc(1, sizeof *mad_agent_priv); 290 if (!mad_agent_priv) { 291 ret = ERR_PTR(-ENOMEM); 292 goto error1; 293 } 294 295 mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, 296 IB_ACCESS_LOCAL_WRITE); 297 if (IS_ERR(mad_agent_priv->agent.mr)) { 298 ret = ERR_PTR(-ENOMEM); 299 goto error2; 300 } 301 302 if (mad_reg_req) { 303 assert(!"NYI"); 304 /*reg_req = malloc(sizeof *reg_req); 305 if (!reg_req) { 306 ret = ERR_PTR(-ENOMEM); 307 goto error3; 308 } 309 Make a copy of the MAD registration request 310 memcpy(reg_req, mad_reg_req, sizeof *reg_req);*/ 311 } 312 313 /*Now, fill in the various structures*/ 314 mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; 315 mad_agent_priv->reg_req = reg_req; 316 mad_agent_priv->agent.rmpp_version = rmpp_version; 317 mad_agent_priv->agent.device = device; 318 mad_agent_priv->agent.recv_handler = recv_handler; 319 mad_agent_priv->agent.send_handler = send_handler; 320 mad_agent_priv->agent.context = context; 321 mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; 322 mad_agent_priv->agent.port_num = port_num; 323 /*spin_lock_init(&mad_agent_priv->lock);*/ 324 INIT_LIST_HEAD(&mad_agent_priv->send_list); 325 INIT_LIST_HEAD(&mad_agent_priv->wait_list); 326 INIT_LIST_HEAD(&mad_agent_priv->done_list); 327 INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); 328 /*INIT_WORK(&mad_agent_priv->timeout_work, timeout_sends); 329 setup_timer(&mad_agent_priv->timeout_timer, timeout_callback, 330 (unsigned long) mad_agent_priv); 331 INIT_LIST_HEAD(&mad_agent_priv->local_list); 332 INIT_WORK(&mad_agent_priv->local_work, local_completions); 333 atomic_set(&mad_agent_priv->refcount, 1); 334 init_completion(&mad_agent_priv->comp); 335 336 spin_lock_irqsave(&port_priv->reg_lock, flags);*/ 337 mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; 338 339 /** Make sure MAD registration (if supplied) 340 * is non overlapping with any existing ones*/ 341 342 if (mad_reg_req) { 343 assert(!"NYI"); 344 /*mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); 345 if (!is_vendor_class(mgmt_class)) { 346 class = port_priv->version[mad_reg_req->mgmt_class_version].class; 347 if (class) { 348 method = class->method_table[mgmt_class]; 349 if (method) { 350 if (method_in_use(&method, mad_reg_req)) 351 goto error4; 352 } 353 } 354 ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, mgmt_class); 355 } else { 356 "New" vendor class range 357 vendor = port_priv->version[mad_reg_req->mgmt_class_version].vendor; 358 if (vendor) { 359 vclass = vendor_class_index(mgmt_class); 360 vendor_class = vendor->vendor_class[vclass]; 361 if (vendor_class) { 362 if (is_vendor_method_in_use(vendor_class, mad_reg_req)) 363 goto error4; 364 } 365 } 366 ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); 367 } 368 if (ret2) { 369 ret = ERR_PTR(ret2); 370 goto error4; 371 }*/ 372 } 373 374 /*Add mad agent into port's agent list*/ 375 list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); 376 /*spin_unlock_irqrestore(&port_priv->reg_lock, flags);*/ 377 378 return &mad_agent_priv->agent; 379 380 /*TODO: cleanup*/ 381 /*error4: spin_unlock_irqrestore(&port_priv->reg_lock, flags); 382 free(reg_req); 383 error3: ib_dereg_mr(mad_agent_priv->agent.mr);*/ 384 error2: free(mad_agent_priv); 385 error1: return ret; 386} 387/* 388 EXPORT_SYMBOL(ib_register_mad_agent); 389 390 static inline int is_snooping_sends(int mad_snoop_flags) 391 { 392 return (mad_snoop_flags & 393 (IB_MAD_SNOOP_POSTED_SENDS | 394 IB_MAD_SNOOP_RMPP_SENDS | 395 IB_MAD_SNOOP_SEND_COMPLETIONS | 396 IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS)); 397 } 398 399 static inline int is_snooping_recvs(int mad_snoop_flags) 400 { 401 return (mad_snoop_flags & 402 (IB_MAD_SNOOP_RECVS | 403 IB_MAD_SNOOP_RMPP_RECVS)); 404 } 405 406 static int register_snoop_agent(struct ib_mad_qp_info *qp_info, 407 struct ib_mad_snoop_private *mad_snoop_priv) 408 { 409 struct ib_mad_snoop_private **new_snoop_table; 410 unsigned long flags; 411 int i; 412 413 spin_lock_irqsave(&qp_info->snoop_lock, flags); 414 Check for empty slot in array. 415 for (i = 0; i < qp_info->snoop_table_size; i++) 416 if (!qp_info->snoop_table[i]) 417 break; 418 419 if (i == qp_info->snoop_table_size) { 420 Grow table. 421 new_snoop_table = krealloc(qp_info->snoop_table, 422 sizeof mad_snoop_priv * 423 (qp_info->snoop_table_size + 1), 424 GFP_ATOMIC); 425 if (!new_snoop_table) { 426 i = -ENOMEM; 427 goto out; 428 } 429 430 qp_info->snoop_table = new_snoop_table; 431 qp_info->snoop_table_size++; 432 } 433 qp_info->snoop_table[i] = mad_snoop_priv; 434 atomic_inc(&qp_info->snoop_count); 435 out: 436 spin_unlock_irqrestore(&qp_info->snoop_lock, flags); 437 return i; 438 } 439 440 struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, 441 u8 port_num, 442 enum ib_qp_type qp_type, 443 int mad_snoop_flags, 444 ib_mad_snoop_handler snoop_handler, 445 ib_mad_recv_handler recv_handler, 446 void *context) 447 { 448 struct ib_mad_port_private *port_priv; 449 struct ib_mad_agent *ret; 450 struct ib_mad_snoop_private *mad_snoop_priv; 451 int qpn; 452 453 Validate parameters 454 if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || 455 (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { 456 ret = ERR_PTR(-EINVAL); 457 goto error1; 458 } 459 qpn = get_spl_qp_index(qp_type); 460 if (qpn == -1) { 461 ret = ERR_PTR(-EINVAL); 462 goto error1; 463 } 464 port_priv = ib_get_mad_port(device, port_num); 465 if (!port_priv) { 466 ret = ERR_PTR(-ENODEV); 467 goto error1; 468 } 469 Allocate structures 470 mad_snoop_priv = calloc(1,sizeof *mad_snoop_priv); 471 if (!mad_snoop_priv) { 472 ret = ERR_PTR(-ENOMEM); 473 goto error1; 474 } 475 476 Now, fill in the various structures 477 mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; 478 mad_snoop_priv->agent.device = device; 479 mad_snoop_priv->agent.recv_handler = recv_handler; 480 mad_snoop_priv->agent.snoop_handler = snoop_handler; 481 mad_snoop_priv->agent.context = context; 482 mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; 483 mad_snoop_priv->agent.port_num = port_num; 484 mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; 485 init_completion(&mad_snoop_priv->comp); 486 mad_snoop_priv->snoop_index = register_snoop_agent( 487 &port_priv->qp_info[qpn], 488 mad_snoop_priv); 489 if (mad_snoop_priv->snoop_index < 0) { 490 ret = ERR_PTR(mad_snoop_priv->snoop_index); 491 goto error2; 492 } 493 494 atomic_set(&mad_snoop_priv->refcount, 1); 495 return &mad_snoop_priv->agent; 496 497 error2: 498 free(mad_snoop_priv); 499 error1: 500 return ret; 501 } 502 EXPORT_SYMBOL(ib_register_mad_snoop); 503 */ 504static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) { 505 /*if (atomic_dec_and_test(&mad_agent_priv->refcount)) 506 complete(&mad_agent_priv->comp);*/ 507} 508/* 509 static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) 510 { 511 if (atomic_dec_and_test(&mad_snoop_priv->refcount)) 512 complete(&mad_snoop_priv->comp); 513 } 514 515 static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) 516 { 517 struct ib_mad_port_private *port_priv; 518 unsigned long flags; 519 520 Note that we could still be handling received MADs 521 522 523 * Canceling all sends results in dropping received response 524 * MADs, preventing us from queuing additional work 525 526 cancel_mads(mad_agent_priv); 527 port_priv = mad_agent_priv->qp_info->port_priv; 528 del_timer_sync(&mad_agent_priv->timeout_timer); 529 cancel_work_sync(&mad_agent_priv->timeout_work); 530 531 spin_lock_irqsave(&port_priv->reg_lock, flags); 532 remove_mad_reg_req(mad_agent_priv); 533 list_del(&mad_agent_priv->agent_list); 534 spin_unlock_irqrestore(&port_priv->reg_lock, flags); 535 536 flush_workqueue(port_priv->wq); 537 ib_cancel_rmpp_recvs(mad_agent_priv); 538 539 deref_mad_agent(mad_agent_priv); 540 wait_for_completion(&mad_agent_priv->comp); 541 542 free(mad_agent_priv->reg_req); 543 ib_dereg_mr(mad_agent_priv->agent.mr); 544 free(mad_agent_priv); 545 } 546 547 static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) 548 { 549 struct ib_mad_qp_info *qp_info; 550 unsigned long flags; 551 552 qp_info = mad_snoop_priv->qp_info; 553 spin_lock_irqsave(&qp_info->snoop_lock, flags); 554 qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; 555 atomic_dec(&qp_info->snoop_count); 556 spin_unlock_irqrestore(&qp_info->snoop_lock, flags); 557 558 deref_snoop_agent(mad_snoop_priv); 559 wait_for_completion(&mad_snoop_priv->comp); 560 561 free(mad_snoop_priv); 562 } 563 564 565 * ib_unregister_mad_agent - Unregisters a client from using MAD services 566 567 int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) 568 { 569 struct ib_mad_agent_private *mad_agent_priv; 570 struct ib_mad_snoop_private *mad_snoop_priv; 571 572 If the TID is zero, the agent can only snoop. 573 if (mad_agent->hi_tid) { 574 mad_agent_priv = container_of(mad_agent, 575 struct ib_mad_agent_private, 576 agent); 577 unregister_mad_agent(mad_agent_priv); 578 } else { 579 mad_snoop_priv = container_of(mad_agent, 580 struct ib_mad_snoop_private, 581 agent); 582 unregister_mad_snoop(mad_snoop_priv); 583 } 584 return 0; 585 } 586 EXPORT_SYMBOL(ib_unregister_mad_agent); 587 */ 588static void dequeue_mad(struct ib_mad_list_head *mad_list) { 589 struct ib_mad_queue *mad_queue; 590 //unsigned long flags; 591 592 assert(!!mad_list->mad_queue); 593 mad_queue = mad_list->mad_queue; 594 /*spin_lock_irqsave(&mad_queue->lock, flags);*/ 595 list_del(&mad_list->list); 596 mad_queue->count--; 597 /*spin_unlock_irqrestore(&mad_queue->lock, flags);*/ 598} 599/* 600 static void snoop_send(struct ib_mad_qp_info *qp_info, 601 struct ib_mad_send_buf *send_buf, 602 struct ib_mad_send_wc *mad_send_wc, 603 int mad_snoop_flags) 604 { 605 struct ib_mad_snoop_private *mad_snoop_priv; 606 unsigned long flags; 607 int i; 608 609 spin_lock_irqsave(&qp_info->snoop_lock, flags); 610 for (i = 0; i < qp_info->snoop_table_size; i++) { 611 mad_snoop_priv = qp_info->snoop_table[i]; 612 if (!mad_snoop_priv || 613 !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) 614 continue; 615 616 atomic_inc(&mad_snoop_priv->refcount); 617 spin_unlock_irqrestore(&qp_info->snoop_lock, flags); 618 mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, 619 send_buf, mad_send_wc); 620 deref_snoop_agent(mad_snoop_priv); 621 spin_lock_irqsave(&qp_info->snoop_lock, flags); 622 } 623 spin_unlock_irqrestore(&qp_info->snoop_lock, flags); 624 } 625 626 static void snoop_recv(struct ib_mad_qp_info *qp_info, 627 struct ib_mad_recv_wc *mad_recv_wc, 628 int mad_snoop_flags) 629 { 630 struct ib_mad_snoop_private *mad_snoop_priv; 631 unsigned long flags; 632 int i; 633 634 spin_lock_irqsave(&qp_info->snoop_lock, flags); 635 for (i = 0; i < qp_info->snoop_table_size; i++) { 636 mad_snoop_priv = qp_info->snoop_table[i]; 637 if (!mad_snoop_priv || 638 !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) 639 continue; 640 641 atomic_inc(&mad_snoop_priv->refcount); 642 spin_unlock_irqrestore(&qp_info->snoop_lock, flags); 643 mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, 644 mad_recv_wc); 645 deref_snoop_agent(mad_snoop_priv); 646 spin_lock_irqsave(&qp_info->snoop_lock, flags); 647 } 648 spin_unlock_irqrestore(&qp_info->snoop_lock, flags); 649 } 650 */ 651static void build_smp_wc(struct ib_qp *qp, u64 wr_id, u16 slid, u16 pkey_index, 652 u8 port_num, struct ib_wc *wc) { 653 memset(wc, 0, sizeof *wc); 654 wc->wr_id = wr_id; 655 wc->status = IB_WC_SUCCESS; 656 wc->opcode = IB_WC_RECV; 657 wc->pkey_index = pkey_index; 658 wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); 659 wc->src_qp = IB_QP0; 660 wc->qp = qp; 661 wc->slid = slid; 662 wc->sl = 0; 663 wc->dlid_path_bits = 0; 664 wc->port_num = port_num; 665} 666/* 667 668 * Return 0 if SMP is to be sent 669 * Return 1 if SMP was consumed locally (whether or not solicited) 670 * Return < 0 if error 671 */ 672static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, 673 struct ib_mad_send_wr_private *mad_send_wr) { 674 int ret = 0; 675 struct ib_smp *smp = mad_send_wr->send_buf.mad; 676 /*unsigned long flags;*/ 677 struct ib_mad_local_private *local; 678 struct ib_mad_private *mad_priv; 679 struct ib_mad_port_private *port_priv; 680 struct ib_mad_agent_private *recv_mad_agent = NULL; 681 struct ib_device *device = mad_agent_priv->agent.device; 682 u8 port_num; 683 struct ib_wc mad_wc; 684 struct ib_send_wr *send_wr = &mad_send_wr->send_wr; 685 686 if (device->node_type == RDMA_NODE_IB_SWITCH) 687 port_num = send_wr->wr.ud.port_num; 688 else 689 port_num = mad_agent_priv->agent.port_num; 690 691 /** Directed route handling starts if the initial LID routed part of 692 * a request or the ending LID routed part of a response is empty. 693 * If we are at the start of the LID routed part, don't update the 694 * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec.*/ 695 696 if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) != 697 IB_LID_PERMISSIVE) 698 goto out; 699 if (smi_handle_dr_smp_send(smp, device->node_type, port_num) 700 == IB_SMI_DISCARD) { 701 ret = -EINVAL; 702 printf("Invalid directed route\n"); 703 goto out; 704 } 705 706 /*Check to post send on QP or process locally*/ 707 if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD 708 && smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD) 709 goto out; 710 711 local = malloc(sizeof *local); 712 if (!local) { 713 ret = -ENOMEM; 714 printf("No memory for ib_mad_local_private\n"); 715 goto out; 716 } 717 local->mad_priv = NULL; 718 local->recv_mad_agent = NULL; 719 mad_priv = calloc(1, sizeof *mad_priv);/*kmem_cache_alloc(ib_mad_cache);*/ 720 if (!mad_priv) { 721 ret = -ENOMEM; 722 printf("No memory for local response MAD\n"); 723 free(local); 724 goto out; 725 } 726 727 build_smp_wc(mad_agent_priv->agent.qp, send_wr->wr_id, 728 be16_to_cpu(smp->dr_slid), send_wr->wr.ud.pkey_index, 729 send_wr->wr.ud.port_num, &mad_wc); 730 731 /*No GRH for DR SMP*/ 732 ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, 733 (struct ib_mad *) smp, (struct ib_mad *) &mad_priv->mad); 734 switch (ret) { 735 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: 736 if (ib_response_mad(&mad_priv->mad.mad) 737 && mad_agent_priv->agent.recv_handler) { 738 local->mad_priv = mad_priv; 739 local->recv_mad_agent = mad_agent_priv; 740 741 /** Reference MAD agent until receive 742 * side of local completion handled*/ 743 744 /*atomic_inc(&mad_agent_priv->refcount);*/ 745 } else 746 free(mad_priv); 747 /*kmem_cache_free(ib_mad_cache, mad_priv);*/ 748 break; 749 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: 750 free(mad_priv); 751 /*kmem_cache_free(ib_mad_cache, mad_priv);*/ 752 break; 753 case IB_MAD_RESULT_SUCCESS: 754 /*Treat like an incoming receive MAD*/ 755 port_priv = ib_get_mad_port(mad_agent_priv->agent.device, 756 mad_agent_priv->agent.port_num); 757 if (port_priv) { 758 memcpy(&mad_priv->mad.mad, smp, sizeof(struct ib_mad)); 759 recv_mad_agent = find_mad_agent(port_priv, &mad_priv->mad.mad); 760 } 761 if (!port_priv || !recv_mad_agent) { 762 763 /** No receiving agent so drop packet and 764 * generate send completion.*/ 765 766 free(mad_priv); 767 /*kmem_cache_free(ib_mad_cache, mad_priv);*/ 768 break; 769 } 770 local->mad_priv = mad_priv; 771 local->recv_mad_agent = recv_mad_agent; 772 break; 773 default: 774 /*kmem_cache_free(ib_mad_cache, mad_priv);*/ 775 free(mad_priv); 776 free(local); 777 ret = -EINVAL; 778 goto out; 779 } 780 781 local->mad_send_wr = mad_send_wr; 782 /*Reference MAD agent until send side of local completion handled*/ 783 /*atomic_inc(&mad_agent_priv->refcount);*/ 784 /* Queue local completion to local list*/ 785 /*spin_lock_irqsave(&mad_agent_priv->lock, flags);*/ 786 list_add_tail(&local->completion_list, &mad_agent_priv->local_list); 787 /*spin_unlock_irqrestore(&mad_agent_priv->lock, flags);*/ 788 queue_work(mad_agent_priv->qp_info->port_priv->wq, 789 &mad_agent_priv->local_work); 790 ret = 1; 791 out: return ret; 792} 793 794static int get_pad_size(int hdr_len, int data_len) { 795 int seg_size, pad; 796 797 seg_size = sizeof(struct ib_mad) - hdr_len; 798 if (data_len && seg_size) { 799 pad = seg_size - data_len % seg_size; 800 return pad == seg_size ? 0 : pad; 801 } else 802 return seg_size; 803} 804 805static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) { 806 struct ib_rmpp_segment *s, *t; 807 808 list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) 809 { 810 list_del(&s->list); 811 free(s); 812 } 813} 814 815static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, 816 gfp_t gfp_mask) { 817 struct ib_mad_send_buf *send_buf = &send_wr->send_buf; 818 struct ib_rmpp_mad *rmpp_mad = send_buf->mad; 819 struct ib_rmpp_segment *seg = NULL; 820 int left, seg_size, pad; 821 822 send_buf->seg_size = sizeof(struct ib_mad) - send_buf->hdr_len; 823 seg_size = send_buf->seg_size; 824 pad = send_wr->pad; 825 826 /*Allocate data segments.*/ 827 for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { 828 seg = malloc(sizeof(*seg) + seg_size); 829 if (!seg) { 830 printf("alloc_send_rmpp_segs: RMPP mem " 831 "alloc failed for len %zd, gfp %#x\n", 832 sizeof(*seg) + seg_size, gfp_mask); 833 /*TODO*/ 834 /*free_send_rmpp_list(send_wr);*/ 835 return -ENOMEM; 836 } 837 seg->num = ++send_buf->seg_count; 838 list_add_tail(&seg->list, &send_wr->rmpp_list); 839 } 840 841 /* Zero any padding*/ 842 if (pad) 843 memset(seg->data + seg_size - pad, 0, pad); 844 845 rmpp_mad->rmpp_hdr.rmpp_version = 846 send_wr->mad_agent_priv->agent.rmpp_version; 847 rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; 848 ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); 849 850 send_wr->cur_seg = container_of(send_wr->rmpp_list.next, 851 struct ib_rmpp_segment, list); 852 send_wr->last_ack_seg = send_wr->cur_seg; 853 return 0; 854} 855 856static inline int ib_get_payload_offset( 857 struct ib_mad_send_wr_private *mad_send_wr) { 858 if (mad_send_wr->send_buf.seg_count) { 859 assert(!"NYI"); 860 return 0; 861 /*return ib_get_rmpp_segment(&mad_send_wr->send_buf, mad_send_wr->seg_num);*/ 862 } else 863 return /*mad_send_wr->send_buf.mad +*/mad_send_wr->send_buf.hdr_len; 864} 865 866struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, 867 u32 remote_qpn, u16 pkey_index, int rmpp_active, int hdr_len, 868 int data_len, gfp_t gfp_mask) { 869 struct ib_mad_agent_private *mad_agent_priv; 870 struct ib_mad_send_wr_private *mad_send_wr; 871 int pad, message_size, ret, size; 872 void *buf; 873 u64 t; 874 875 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, 876 agent); 877 pad = get_pad_size(hdr_len, data_len); 878 message_size = hdr_len + data_len + pad; 879 880 if ((!mad_agent->rmpp_version 881 && (rmpp_active || message_size > sizeof(struct ib_mad))) 882 || (!rmpp_active && message_size > sizeof(struct ib_mad))) 883 return ERR_PTR(-EINVAL); 884 885 size = rmpp_active ? hdr_len : sizeof(struct ib_mad); 886 887 buf = dma_alloc(sizeof *mad_send_wr + size, &t); 888 if (!buf) 889 return ERR_PTR(-ENOMEM); 890 891 mad_send_wr = buf + size; 892 INIT_LIST_HEAD(&mad_send_wr->rmpp_list); 893 mad_send_wr->send_buf.mad = buf; 894 mad_send_wr->send_buf.hdr_len = hdr_len; 895 mad_send_wr->send_buf.data_len = data_len; 896 mad_send_wr->pad = pad; 897 898 mad_send_wr->mad_agent_priv = mad_agent_priv; 899 mad_send_wr->sg_list[0].length = hdr_len; 900 mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey; 901 mad_send_wr->sg_list[0].addr = t; 902 903 mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len; 904 mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey; 905 mad_send_wr->sg_list[1].addr = t + ib_get_payload_offset(mad_send_wr); 906 907 mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; 908 mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; 909 mad_send_wr->send_wr.num_sge = 2; 910 mad_send_wr->send_wr.opcode = IB_WR_SEND; 911 mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; 912 mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; 913 mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; 914 mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index; 915 916 if (rmpp_active) { 917 ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask); 918 if (ret) { 919 free(buf); 920 return ERR_PTR(ret); 921 } 922 } 923 924 mad_send_wr->send_buf.mad_agent = mad_agent; 925 /*atomic_inc(&mad_agent_priv->refcount);*/ 926 return &mad_send_wr->send_buf; 927} 928/* 929 EXPORT_SYMBOL(ib_create_send_mad); 930 931 int ib_get_mad_data_offset(u8 mgmt_class) 932 { 933 if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) 934 return IB_MGMT_SA_HDR; 935 else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || 936 (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || 937 (mgmt_class == IB_MGMT_CLASS_BIS)) 938 return IB_MGMT_DEVICE_HDR; 939 else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && 940 (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) 941 return IB_MGMT_VENDOR_HDR; 942 else 943 return IB_MGMT_MAD_HDR; 944 } 945 EXPORT_SYMBOL(ib_get_mad_data_offset); 946 947 int ib_is_mad_class_rmpp(u8 mgmt_class) 948 { 949 if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || 950 (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || 951 (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || 952 (mgmt_class == IB_MGMT_CLASS_BIS) || 953 ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && 954 (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) 955 return 1; 956 return 0; 957 } 958 EXPORT_SYMBOL(ib_is_mad_class_rmpp); 959 960 void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) { 961 struct ib_mad_send_wr_private *mad_send_wr; 962 struct list_head *list; 963 964 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, 965 send_buf); 966 list = &mad_send_wr->cur_seg->list; 967 968 if (mad_send_wr->cur_seg->num < seg_num) { 969 list_for_each_entry(mad_send_wr->cur_seg, list, list) 970 if (mad_send_wr->cur_seg->num == seg_num) 971 break; 972 } else if (mad_send_wr->cur_seg->num > seg_num) { 973 list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) 974 if (mad_send_wr->cur_seg->num == seg_num) 975 break; 976 } 977 return mad_send_wr->cur_seg->data; 978 } 979 980 EXPORT_SYMBOL(ib_get_rmpp_segment); 981 */ 982void ib_free_send_mad(struct ib_mad_send_buf *send_buf) { 983 struct ib_mad_agent_private *mad_agent_priv; 984 struct ib_mad_send_wr_private *mad_send_wr; 985 986 mad_agent_priv = container_of(send_buf->mad_agent, 987 struct ib_mad_agent_private, agent); 988 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, 989 send_buf); 990 991 free_send_rmpp_list(mad_send_wr); 992 free(send_buf->mad); 993 deref_mad_agent(mad_agent_priv); 994} 995/* 996 EXPORT_SYMBOL(ib_free_send_mad); 997 */ 998int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) { 999 struct ib_mad_qp_info *qp_info; 1000 struct list_head *list; 1001 struct ib_send_wr *bad_send_wr; 1002 struct ib_mad_agent *mad_agent; 1003 struct ib_sge *sge; 1004 /*unsigned long flags;*/ 1005 int ret; 1006 1007 /*Set WR ID to find mad_send_wr upon completion*/ 1008 qp_info = mad_send_wr->mad_agent_priv->qp_info; 1009 mad_send_wr->send_wr.wr_id = (unsigned long) &mad_send_wr->mad_list; 1010 mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; 1011 1012 mad_agent = mad_send_wr->send_buf.mad_agent; 1013 sge = mad_send_wr->sg_list; 1014 /*sge[0].addr = ib_dma_map_single(mad_agent->device, 1015 mad_send_wr->send_buf.mad, sge[0].length, DMA_TO_DEVICE);*/ 1016 mad_send_wr->header_mapping = sge[0].addr; 1017 1018 /*sge[1].addr = ib_dma_map_single(mad_agent->device, 1019 ib_get_payload(mad_send_wr), sge[1].length, DMA_TO_DEVICE);*/ 1020 mad_send_wr->payload_mapping = sge[1].addr; 1021 1022 /*spin_lock_irqsave(&qp_info->send_queue.lock, flags);*/ 1023 if (qp_info->send_queue.count < qp_info->send_queue.max_active) { 1024 ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, &bad_send_wr); 1025 list = &qp_info->send_queue.list; 1026 } else { 1027 ret = 0; 1028 list = &qp_info->overflow_list; 1029 } 1030 1031 if (!ret) { 1032 qp_info->send_queue.count++; 1033 list_add_tail(&mad_send_wr->mad_list.list, list); 1034 } 1035 /*spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); 1036 if (ret) { 1037 ib_dma_unmap_single(mad_agent->device, mad_send_wr->header_mapping, 1038 sge[0].length, DMA_TO_DEVICE); 1039 ib_dma_unmap_single(mad_agent->device, mad_send_wr->payload_mapping, 1040 sge[1].length, DMA_TO_DEVICE); 1041 }*/ 1042 return ret; 1043} 1044/* 1045 1046 * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated 1047 * with the registered client 1048 */ 1049int ib_post_send_mad(struct ib_mad_send_buf *send_buf, 1050 struct ib_mad_send_buf **bad_send_buf) { 1051 struct ib_mad_agent_private *mad_agent_priv; 1052 struct ib_mad_send_buf *next_send_buf; 1053 struct ib_mad_send_wr_private *mad_send_wr; 1054 /*unsigned long flags;*/ 1055 int ret = -EINVAL; 1056 1057 /*Walk list of send WRs and post each on send list*/ 1058 for (; send_buf; send_buf = next_send_buf) { 1059 1060 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, 1061 send_buf); 1062 mad_agent_priv = mad_send_wr->mad_agent_priv; 1063 1064 if (!send_buf->mad_agent->send_handler 1065 || (send_buf->timeout_ms && !send_buf->mad_agent->recv_handler)) { 1066 ret = -EINVAL; 1067 goto error; 1068 } 1069 1070 /*XXX: should be impl*/ 1071 /*if (!ib_is_mad_class_rmpp( 1072 ((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { 1073 if (mad_agent_priv->agent.rmpp_version) { 1074 ret = -EINVAL; 1075 goto error; 1076 } 1077 }*/ 1078 1079 /** Save pointer to next work request to post in case the 1080 * current one completes, and the user modifies the work 1081 * request associated with the completion*/ 1082 1083 next_send_buf = send_buf->next; 1084 mad_send_wr->send_wr.wr.ud.ah = send_buf->ah; 1085 1086 if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == 1087 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 1088 ret = handle_outgoing_dr_smp(mad_agent_priv, mad_send_wr); 1089 if (ret < 0) /*error*/ 1090 goto error; 1091 else if (ret == 1) /*locally consumed*/ 1092 continue; 1093 } 1094 1095 mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; 1096 /*Timeout will be updated after send completes*/ 1097 /*XXX*/ 1098 /*mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms);*/ 1099 mad_send_wr->max_retries = send_buf->retries; 1100 mad_send_wr->retries_left = send_buf->retries; 1101 send_buf->retries = 0; 1102 /*Reference for work request to QP + response*/ 1103 /*XXX*/ 1104 /*mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0);*/ 1105 mad_send_wr->status = IB_WC_SUCCESS; 1106 1107 /*Reference MAD agent until send completes*/ 1108 /*XXX*/ 1109 /*atomic_inc(&mad_agent_priv->refcount); 1110 spin_lock_irqsave(&mad_agent_priv->lock, flags);*/ 1111 list_add_tail(&mad_send_wr->agent_list, &mad_agent_priv->send_list); 1112 /*spin_unlock_irqrestore(&mad_agent_priv->lock, flags);*/ 1113 1114 if (mad_agent_priv->agent.rmpp_version) { 1115 assert(!"NYI"); 1116 /*ret = ib_send_rmpp_mad(mad_send_wr); 1117 if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) 1118 ret = ib_send_mad(mad_send_wr);*/ 1119 } else 1120 ret = ib_send_mad(mad_send_wr); 1121 if (ret < 0) { 1122 /*Fail send request*/ 1123 /*spin_lock_irqsave(&mad_agent_priv->lock, flags);*/ 1124 list_del(&mad_send_wr->agent_list); 1125 /*spin_unlock_irqrestore(&mad_agent_priv->lock, flags);*/ 1126 /*atomic_dec(&mad_agent_priv->refcount);*/ 1127 goto error; 1128 } 1129 } 1130 return 0; 1131 error: if (bad_send_buf) 1132 *bad_send_buf = send_buf; 1133 return ret; 1134} 1135/* 1136 EXPORT_SYMBOL(ib_post_send_mad); 1137 1138 1139 * ib_free_recv_mad - Returns data buffers used to receive 1140 * a MAD to the access layer 1141 1142 void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) 1143 { 1144 struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; 1145 struct ib_mad_private_header *mad_priv_hdr; 1146 struct ib_mad_private *priv; 1147 struct list_head free_list; 1148 1149 INIT_LIST_HEAD(&free_list); 1150 list_splice_init(&mad_recv_wc->rmpp_list, &free_list); 1151 1152 list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, 1153 &free_list, list) { 1154 mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, 1155 recv_buf); 1156 mad_priv_hdr = container_of(mad_recv_wc, 1157 struct ib_mad_private_header, 1158 recv_wc); 1159 priv = container_of(mad_priv_hdr, struct ib_mad_private, 1160 header); 1161 kmem_cache_free(ib_mad_cache, priv); 1162 } 1163 } 1164 EXPORT_SYMBOL(ib_free_recv_mad); 1165 1166 struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, 1167 u8 rmpp_version, 1168 ib_mad_send_handler send_handler, 1169 ib_mad_recv_handler recv_handler, 1170 void *context) 1171 { 1172 return ERR_PTR(-EINVAL); XXX: for now 1173 } 1174 EXPORT_SYMBOL(ib_redirect_mad_qp); 1175 1176 int ib_process_mad_wc(struct ib_mad_agent *mad_agent, 1177 struct ib_wc *wc) 1178 { 1179 printf( "ib_process_mad_wc() not implemented yet\n"); 1180 return 0; 1181 } 1182 EXPORT_SYMBOL(ib_process_mad_wc); 1183 */ 1184static int method_in_use(struct ib_mad_mgmt_method_table **method, 1185 struct ib_mad_reg_req *mad_reg_req) { 1186 int i; 1187 1188 for (i = find_first_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS); 1189 i < IB_MGMT_MAX_METHODS; 1190 i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, 1191 1 + i)) { 1192 if ((*method)->agent[i]) { 1193 printf("Method %d already in use\n", i); 1194 return -EINVAL; 1195 } 1196 } 1197 return 0; 1198} 1199/* 1200 static int allocate_method_table(struct ib_mad_mgmt_method_table **method) 1201 { 1202 Allocate management method table 1203 *method = calloc(1,sizeof **method); 1204 if (!*method) { 1205 printf( "No memory for " 1206 "ib_mad_mgmt_method_table\n"); 1207 return -ENOMEM; 1208 } 1209 1210 return 0; 1211 } 1212 1213 1214 * Check to see if there are any methods still in use 1215 1216 static int check_method_table(struct ib_mad_mgmt_method_table *method) 1217 { 1218 int i; 1219 1220 for (i = 0; i < IB_MGMT_MAX_METHODS; i++) 1221 if (method->agent[i]) 1222 return 1; 1223 return 0; 1224 } 1225 1226 1227 * Check to see if there are any method tables for this class still in use 1228 1229 static int check_class_table(struct ib_mad_mgmt_class_table *class) 1230 { 1231 int i; 1232 1233 for (i = 0; i < MAX_MGMT_CLASS; i++) 1234 if (class->method_table[i]) 1235 return 1; 1236 return 0; 1237 } 1238 1239 static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) 1240 { 1241 int i; 1242 1243 for (i = 0; i < MAX_MGMT_OUI; i++) 1244 if (vendor_class->method_table[i]) 1245 return 1; 1246 return 0; 1247 } 1248 */ 1249static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, 1250 u8 *oui) { 1251 int i; 1252 1253 for (i = 0; i < MAX_MGMT_OUI; i++) 1254 /* Is there matching OUI for this vendor class ?*/ 1255 if (!memcmp(vendor_class->oui[i], oui, 3)) 1256 return i; 1257 1258 return -1; 1259} 1260/* 1261 static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) 1262 { 1263 int i; 1264 1265 for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) 1266 if (vendor->vendor_class[i]) 1267 return 1; 1268 1269 return 0; 1270 } 1271 1272 static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, 1273 struct ib_mad_agent_private *agent) 1274 { 1275 int i; 1276 1277 Remove any methods for this mad agent 1278 for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { 1279 if (method->agent[i] == agent) { 1280 method->agent[i] = NULL; 1281 } 1282 } 1283 } 1284 1285 static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, 1286 struct ib_mad_agent_private *agent_priv, u8 mgmt_class) { 1287 struct ib_mad_port_private *port_priv; 1288 struct ib_mad_mgmt_class_table **class; 1289 struct ib_mad_mgmt_method_table **method; 1290 int i, ret; 1291 1292 port_priv = agent_priv->qp_info->port_priv; 1293 class = &port_priv->version[mad_reg_req->mgmt_class_version].class; 1294 if (!*class) { 1295 Allocate management class table for "new" class version 1296 *class = calloc(1, sizeof **class); 1297 if (!*class) { 1298 printf("No memory for " 1299 "ib_mad_mgmt_class_table\n"); 1300 ret = -ENOMEM; 1301 goto error1; 1302 } 1303 1304 Allocate method table for this management class 1305 method = &(*class)->method_table[mgmt_class]; 1306 if ((ret = allocate_method_table(method))) 1307 goto error2; 1308 } else { 1309 method = &(*class)->method_table[mgmt_class]; 1310 if (!*method) { 1311 Allocate method table for this management class 1312 if ((ret = allocate_method_table(method))) 1313 goto error1; 1314 } 1315 } 1316 1317 Now, make sure methods are not already in use 1318 if (method_in_use(method, mad_reg_req)) 1319 goto error3; 1320 1321 Finally, add in methods being registered 1322 for (i = find_first_bit(mad_reg_req->method_mask, 1323 IB_MGMT_MAX_METHODS); i < IB_MGMT_MAX_METHODS; 1324 i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, 1325 1 + i)) { 1326 (*method)->agent[i] = agent_priv; 1327 } 1328 return 0; 1329 1330 error3: 1331 Remove any methods for this mad agent 1332 remove_methods_mad_agent(*method, agent_priv); 1333 Now, check to see if there are any methods in use 1334 if (!check_method_table(*method)) { 1335 If not, release management method table 1336 free(*method); 1337 *method = NULL; 1338 } 1339 ret = -EINVAL; 1340 goto error1; 1341 error2: free(*class); 1342 *class = NULL; 1343 error1: return ret; 1344 } 1345 1346 static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, 1347 struct ib_mad_agent_private *agent_priv) 1348 { 1349 struct ib_mad_port_private *port_priv; 1350 struct ib_mad_mgmt_vendor_class_table **vendor_table; 1351 struct ib_mad_mgmt_vendor_class_table *vendor = NULL; 1352 struct ib_mad_mgmt_vendor_class *vendor_class = NULL; 1353 struct ib_mad_mgmt_method_table **method; 1354 int i, ret = -ENOMEM; 1355 u8 vclass; 1356 1357 "New" vendor (with OUI) class 1358 vclass = vendor_class_index(mad_reg_req->mgmt_class); 1359 port_priv = agent_priv->qp_info->port_priv; 1360 vendor_table = &port_priv->version[ 1361 mad_reg_req->mgmt_class_version].vendor; 1362 if (!*vendor_table) { 1363 Allocate mgmt vendor class table for "new" class version 1364 vendor = calloc(1,sizeof *vendor); 1365 if (!vendor) { 1366 printf( "No memory for " 1367 "ib_mad_mgmt_vendor_class_table\n"); 1368 goto error1; 1369 } 1370 1371 *vendor_table = vendor; 1372 } 1373 if (!(*vendor_table)->vendor_class[vclass]) { 1374 Allocate table for this management vendor class 1375 vendor_class = calloc(1,sizeof *vendor_class); 1376 if (!vendor_class) { 1377 printf( "No memory for " 1378 "ib_mad_mgmt_vendor_class\n"); 1379 goto error2; 1380 } 1381 1382 (*vendor_table)->vendor_class[vclass] = vendor_class; 1383 } 1384 for (i = 0; i < MAX_MGMT_OUI; i++) { 1385 Is there matching OUI for this vendor class ? 1386 if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], 1387 mad_reg_req->oui, 3)) { 1388 method = &(*vendor_table)->vendor_class[ 1389 vclass]->method_table[i]; 1390 BUG_ON(!*method); 1391 goto check_in_use; 1392 } 1393 } 1394 for (i = 0; i < MAX_MGMT_OUI; i++) { 1395 OUI slot available ? 1396 if (!is_vendor_oui((*vendor_table)->vendor_class[ 1397 vclass]->oui[i])) { 1398 method = &(*vendor_table)->vendor_class[ 1399 vclass]->method_table[i]; 1400 BUG_ON(*method); 1401 Allocate method table for this OUI 1402 if ((ret = allocate_method_table(method))) 1403 goto error3; 1404 memcpy((*vendor_table)->vendor_class[vclass]->oui[i], 1405 mad_reg_req->oui, 3); 1406 goto check_in_use; 1407 } 1408 } 1409 printf( "All OUI slots in use\n"); 1410 goto error3; 1411 1412 check_in_use: 1413 Now, make sure methods are not already in use 1414 if (method_in_use(method, mad_reg_req)) 1415 goto error4; 1416 1417 Finally, add in methods being registered 1418 for (i = find_first_bit(mad_reg_req->method_mask, 1419 IB_MGMT_MAX_METHODS); 1420 i < IB_MGMT_MAX_METHODS; 1421 i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, 1422 1+i)) { 1423 (*method)->agent[i] = agent_priv; 1424 } 1425 return 0; 1426 1427 error4: 1428 Remove any methods for this mad agent 1429 remove_methods_mad_agent(*method, agent_priv); 1430 Now, check to see if there are any methods in use 1431 if (!check_method_table(*method)) { 1432 If not, release management method table 1433 free(*method); 1434 *method = NULL; 1435 } 1436 ret = -EINVAL; 1437 error3: 1438 if (vendor_class) { 1439 (*vendor_table)->vendor_class[vclass] = NULL; 1440 free(vendor_class); 1441 } 1442 error2: 1443 if (vendor) { 1444 *vendor_table = NULL; 1445 free(vendor); 1446 } 1447 error1: 1448 return ret; 1449 } 1450 1451 static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) 1452 { 1453 struct ib_mad_port_private *port_priv; 1454 struct ib_mad_mgmt_class_table *class; 1455 struct ib_mad_mgmt_method_table *method; 1456 struct ib_mad_mgmt_vendor_class_table *vendor; 1457 struct ib_mad_mgmt_vendor_class *vendor_class; 1458 int index; 1459 u8 mgmt_class; 1460 1461 1462 * Was MAD registration request supplied 1463 * with original registration ? 1464 1465 if (!agent_priv->reg_req) { 1466 goto out; 1467 } 1468 1469 port_priv = agent_priv->qp_info->port_priv; 1470 mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); 1471 class = port_priv->version[ 1472 agent_priv->reg_req->mgmt_class_version].class; 1473 if (!class) 1474 goto vendor_check; 1475 1476 method = class->method_table[mgmt_class]; 1477 if (method) { 1478 Remove any methods for this mad agent 1479 remove_methods_mad_agent(method, agent_priv); 1480 Now, check to see if there are any methods still in use 1481 if (!check_method_table(method)) { 1482 If not, release management method table 1483 free(method); 1484 class->method_table[mgmt_class] = NULL; 1485 Any management classes left ? 1486 if (!check_class_table(class)) { 1487 If not, release management class table 1488 free(class); 1489 port_priv->version[ 1490 agent_priv->reg_req-> 1491 mgmt_class_version].class = NULL; 1492 } 1493 } 1494 } 1495 1496 vendor_check: 1497 if (!is_vendor_class(mgmt_class)) 1498 goto out; 1499 1500 normalize mgmt_class to vendor range 2 1501 mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); 1502 vendor = port_priv->version[ 1503 agent_priv->reg_req->mgmt_class_version].vendor; 1504 1505 if (!vendor) 1506 goto out; 1507 1508 vendor_class = vendor->vendor_class[mgmt_class]; 1509 if (vendor_class) { 1510 index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); 1511 if (index < 0) 1512 goto out; 1513 method = vendor_class->method_table[index]; 1514 if (method) { 1515 Remove any methods for this mad agent 1516 remove_methods_mad_agent(method, agent_priv); 1517 1518 * Now, check to see if there are 1519 * any methods still in use 1520 1521 if (!check_method_table(method)) { 1522 If not, release management method table 1523 free(method); 1524 vendor_class->method_table[index] = NULL; 1525 memset(vendor_class->oui[index], 0, 3); 1526 Any OUIs left ? 1527 if (!check_vendor_class(vendor_class)) { 1528 If not, release vendor class table 1529 free(vendor_class); 1530 vendor->vendor_class[mgmt_class] = NULL; 1531 Any other vendor classes left ? 1532 if (!check_vendor_table(vendor)) { 1533 free(vendor); 1534 port_priv->version[ 1535 agent_priv->reg_req-> 1536 mgmt_class_version]. 1537 vendor = NULL; 1538 } 1539 } 1540 } 1541 } 1542 } 1543 1544 out: 1545 return; 1546 } 1547 */ 1548static struct ib_mad_agent_private *find_mad_agent( 1549 struct ib_mad_port_private *port_priv, struct ib_mad *mad) { 1550 struct ib_mad_agent_private *mad_agent = NULL; 1551 /*unsigned long flags;*/ 1552 1553 /*spin_lock_irqsave(&port_priv->reg_lock, flags);*/ 1554 if (ib_response_mad(mad)) { 1555 u32 hi_tid; 1556 struct ib_mad_agent_private *entry; 1557 1558 /** Routing is based on high 32 bits of transaction ID 1559 * of MAD.*/ 1560 1561 hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32; 1562 list_for_each_entry(entry, &port_priv->agent_list, agent_list) 1563 { 1564 if (entry->agent.hi_tid == hi_tid) { 1565 mad_agent = entry; 1566 break; 1567 } 1568 } 1569 } else { 1570 struct ib_mad_mgmt_class_table *class; 1571 struct ib_mad_mgmt_method_table *method; 1572 struct ib_mad_mgmt_vendor_class_table *vendor; 1573 struct ib_mad_mgmt_vendor_class *vendor_class; 1574 struct ib_vendor_mad *vendor_mad; 1575 int index; 1576 1577 /** Routing is based on version, class, and method 1578 * For "newer" vendor MADs, also based on OUI*/ 1579 1580 if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION) 1581 goto out; 1582 if (!is_vendor_class(mad->mad_hdr.mgmt_class)) { 1583 class = port_priv->version[mad->mad_hdr.class_version].class; 1584 if (!class) 1585 goto out; 1586 method = class->method_table[convert_mgmt_class( 1587 mad->mad_hdr.mgmt_class)]; 1588 if (method) 1589 mad_agent = method->agent[mad->mad_hdr.method 1590 & ~IB_MGMT_METHOD_RESP]; 1591 } else { 1592 vendor = port_priv->version[mad->mad_hdr.class_version].vendor; 1593 if (!vendor) 1594 goto out; 1595 vendor_class = vendor->vendor_class[vendor_class_index( 1596 mad->mad_hdr.mgmt_class)]; 1597 if (!vendor_class) 1598 goto out; 1599 /*Find matching OUI*/ 1600 vendor_mad = (struct ib_vendor_mad *) mad; 1601 index = find_vendor_oui(vendor_class, vendor_mad->oui); 1602 if (index == -1) 1603 goto out; 1604 method = vendor_class->method_table[index]; 1605 if (method) { 1606 mad_agent = method->agent[mad->mad_hdr.method 1607 & ~IB_MGMT_METHOD_RESP]; 1608 } 1609 } 1610 } 1611 1612 if (mad_agent) { 1613 if (!mad_agent->agent.recv_handler) { 1614 /*atomic_inc(&mad_agent->refcount); 1615 else {*/ 1616 printf("No receive handler for client " 1617 "%p on port %d\n", &mad_agent->agent, port_priv->port_num); 1618 mad_agent = NULL; 1619 } 1620 } 1621 out: /*spin_unlock_irqrestore(&port_priv->reg_lock, flags);*/ 1622 1623 return mad_agent; 1624} 1625/* 1626 static int validate_mad(struct ib_mad *mad, u32 qp_num) 1627 { 1628 int valid = 0; 1629 1630 Make sure MAD base version is understood 1631 if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) { 1632 printf( "MAD received with unsupported base " 1633 "version %d\n", mad->mad_hdr.base_version); 1634 goto out; 1635 } 1636 1637 Filter SMI packets sent to other than QP0 1638 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || 1639 (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { 1640 if (qp_num == 0) 1641 valid = 1; 1642 } else { 1643 Filter GSI packets sent to QP0 1644 if (qp_num != 0) 1645 valid = 1; 1646 } 1647 1648 out: 1649 return valid; 1650 } 1651 1652 static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv, 1653 struct ib_mad_hdr *mad_hdr) 1654 { 1655 struct ib_rmpp_mad *rmpp_mad; 1656 1657 rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; 1658 return !mad_agent_priv->agent.rmpp_version || 1659 !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & 1660 IB_MGMT_RMPP_FLAG_ACTIVE) || 1661 (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); 1662 } 1663 1664 static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr, 1665 struct ib_mad_recv_wc *rwc) 1666 { 1667 return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class == 1668 rwc->recv_buf.mad->mad_hdr.mgmt_class; 1669 } 1670 1671 static inline int rcv_has_same_gid(struct ib_mad_agent_private *mad_agent_priv, 1672 struct ib_mad_send_wr_private *wr, 1673 struct ib_mad_recv_wc *rwc ) 1674 { 1675 struct ib_ah_attr attr; 1676 u8 send_resp, rcv_resp; 1677 union ib_gid sgid; 1678 struct ib_device *device = mad_agent_priv->agent.device; 1679 u8 port_num = mad_agent_priv->agent.port_num; 1680 u8 lmc; 1681 1682 send_resp = ib_response_mad((struct ib_mad *)wr->send_buf.mad); 1683 rcv_resp = ib_response_mad(rwc->recv_buf.mad); 1684 1685 if (send_resp == rcv_resp) 1686 both requests, or both responses. GIDs different 1687 return 0; 1688 1689 if (ib_query_ah(wr->send_buf.ah, &attr)) 1690 Assume not equal, to avoid false positives. 1691 return 0; 1692 1693 if (!!(attr.ah_flags & IB_AH_GRH) != 1694 !!(rwc->wc->wc_flags & IB_WC_GRH)) 1695 one has GID, other does not. Assume different 1696 return 0; 1697 1698 if (!send_resp && rcv_resp) { 1699 is request/response. 1700 if (!(attr.ah_flags & IB_AH_GRH)) { 1701 if (ib_get_cached_lmc(device, port_num, &lmc)) 1702 return 0; 1703 return (!lmc || !((attr.src_path_bits ^ 1704 rwc->wc->dlid_path_bits) & 1705 ((1 << lmc) - 1))); 1706 } else { 1707 if (ib_get_cached_gid(device, port_num, 1708 attr.grh.sgid_index, &sgid)) 1709 return 0; 1710 return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, 1711 16); 1712 } 1713 } 1714 1715 if (!(attr.ah_flags & IB_AH_GRH)) 1716 return attr.dlid == rwc->wc->slid; 1717 else 1718 return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw, 1719 16); 1720 } 1721 1722 static inline int is_direct(u8 class) 1723 { 1724 return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE); 1725 } 1726 1727 struct ib_mad_send_wr_private* 1728 ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, 1729 struct ib_mad_recv_wc *wc) 1730 { 1731 struct ib_mad_send_wr_private *wr; 1732 struct ib_mad *mad; 1733 1734 mad = (struct ib_mad *)wc->recv_buf.mad; 1735 1736 list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) { 1737 if ((wr->tid == mad->mad_hdr.tid) && 1738 rcv_has_same_class(wr, wc) && 1739 1740 * Don't check GID for direct routed MADs. 1741 * These might have permissive LIDs. 1742 1743 (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || 1744 rcv_has_same_gid(mad_agent_priv, wr, wc))) 1745 return (wr->status == IB_WC_SUCCESS) ? wr : NULL; 1746 } 1747 1748 1749 * It's possible to receive the response before we've 1750 * been notified that the send has completed 1751 1752 list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) { 1753 if (is_data_mad(mad_agent_priv, wr->send_buf.mad) && 1754 wr->tid == mad->mad_hdr.tid && 1755 wr->timeout && 1756 rcv_has_same_class(wr, wc) && 1757 1758 * Don't check GID for direct routed MADs. 1759 * These might have permissive LIDs. 1760 1761 (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || 1762 rcv_has_same_gid(mad_agent_priv, wr, wc))) 1763 Verify request has not been canceled 1764 return (wr->status == IB_WC_SUCCESS) ? wr : NULL; 1765 } 1766 return NULL; 1767 } 1768 1769 void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) 1770 { 1771 mad_send_wr->timeout = 0; 1772 if (mad_send_wr->refcount == 1) 1773 list_move_tail(&mad_send_wr->agent_list, 1774 &mad_send_wr->mad_agent_priv->done_list); 1775 } 1776 1777 static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, 1778 struct ib_mad_recv_wc *mad_recv_wc) 1779 { 1780 struct ib_mad_send_wr_private *mad_send_wr; 1781 struct ib_mad_send_wc mad_send_wc; 1782 unsigned long flags; 1783 1784 INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); 1785 list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); 1786 if (mad_agent_priv->agent.rmpp_version) { 1787 mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, 1788 mad_recv_wc); 1789 if (!mad_recv_wc) { 1790 deref_mad_agent(mad_agent_priv); 1791 return; 1792 } 1793 } 1794 1795 Complete corresponding request 1796 if (ib_response_mad(mad_recv_wc->recv_buf.mad)) { 1797 spin_lock_irqsave(&mad_agent_priv->lock, flags); 1798 mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); 1799 if (!mad_send_wr) { 1800 spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 1801 ib_free_recv_mad(mad_recv_wc); 1802 deref_mad_agent(mad_agent_priv); 1803 return; 1804 } 1805 ib_mark_mad_done(mad_send_wr); 1806 spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 1807 1808 Defined behavior is to complete response before request 1809 mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf; 1810 mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, 1811 mad_recv_wc); 1812 atomic_dec(&mad_agent_priv->refcount); 1813 1814 mad_send_wc.status = IB_WC_SUCCESS; 1815 mad_send_wc.vendor_err = 0; 1816 mad_send_wc.send_buf = &mad_send_wr->send_buf; 1817 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); 1818 } else { 1819 mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, 1820 mad_recv_wc); 1821 deref_mad_agent(mad_agent_priv); 1822 } 1823 } 1824 */ 1825static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, 1826 struct ib_wc *wc) { 1827 struct ib_mad_qp_info *qp_info; 1828 struct ib_mad_private_header *mad_priv_hdr; 1829 struct ib_mad_private *recv, *response = NULL; 1830 struct ib_mad_list_head *mad_list; 1831 struct ib_mad_agent_private *mad_agent; 1832 int port_num; 1833 1834 mad_list = (struct ib_mad_list_head *) (unsigned long) wc->wr_id; 1835 qp_info = mad_list->mad_queue->qp_info; 1836 dequeue_mad(mad_list); 1837 1838 mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, 1839 mad_list); 1840 recv = container_of(mad_priv_hdr, struct ib_mad_private, header); 1841//ib_dma_unmap_single(port_priv->device, recv->header.mapping, 1842// sizeof(struct ib_mad_private) 1843// - sizeof(struct ib_mad_private_header), DMA_FROM_DEVICE); 1844 1845 /*Setup MAD receive work completion from "normal" work completion*/ 1846 recv->header.wc = *wc; 1847 recv->header.recv_wc.wc = &recv->header.wc; 1848 recv->header.recv_wc.mad_len = sizeof(struct ib_mad); 1849 recv->header.recv_wc.recv_buf.mad = &recv->mad.mad; 1850 recv->header.recv_wc.recv_buf.grh = &recv->grh; 1851 1852//if (atomic_read(&qp_info->snoop_count)) 1853// snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); 1854 1855 /*Validate MAD*/ 1856//if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num)) 1857// goto out; 1858 response = calloc(1, sizeof *response); //kmem_cache_alloc(ib_mad_cache); 1859 if (!response) { 1860 printf("ib_mad_recv_done_handler no memory " 1861 "for response buffer\n"); 1862 goto out; 1863 } 1864 1865 if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) 1866 port_num = wc->port_num; 1867 else 1868 port_num = port_priv->port_num; 1869 1870 if (recv->mad.mad.mad_hdr.mgmt_class == 1871 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 1872 enum smi_forward_action retsmi; 1873 1874 if (smi_handle_dr_smp_recv(&recv->mad.smp, port_priv->device->node_type, 1875 port_num, port_priv->device->phys_port_cnt) == IB_SMI_DISCARD) 1876 goto out; 1877 1878 retsmi = smi_check_forward_dr_smp(&recv->mad.smp); 1879 if (retsmi == IB_SMI_LOCAL) 1880 goto local; 1881 1882 if (retsmi == IB_SMI_SEND) { /*don't forward 1883 */ 1884 if (smi_handle_dr_smp_send(&recv->mad.smp, 1885 port_priv->device->node_type, port_num) == IB_SMI_DISCARD) 1886 goto out; 1887 1888 if (smi_check_local_smp(&recv->mad.smp, port_priv->device) 1889 == IB_SMI_DISCARD) 1890 goto out; 1891 } else if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) { 1892 /*forward case for switches*/ 1893 memcpy(response, recv, sizeof(*response)); 1894 response->header.recv_wc.wc = &response->header.wc; 1895 response->header.recv_wc.recv_buf.mad = &response->mad.mad; 1896 response->header.recv_wc.recv_buf.grh = &response->grh; 1897 1898 agent_send_response(&response->mad.mad, &response->grh, wc, 1899 port_priv->device, smi_get_fwd_port(&recv->mad.smp), 1900 qp_info->qp->qp_num); 1901 1902 goto out; 1903 } 1904 } 1905 1906 local: 1907 /*Give driver "right of first refusal" on incoming MAD*/ 1908 if (port_priv->device->process_mad) { 1909 int ret; 1910 1911 ret = port_priv->device->process_mad(port_priv->device, 0, 1912 port_priv->port_num, wc, &recv->grh, &recv->mad.mad, 1913 &response->mad.mad); 1914 if (ret & IB_MAD_RESULT_SUCCESS) { 1915 if (ret & IB_MAD_RESULT_CONSUMED) 1916 goto out; 1917 if (ret & IB_MAD_RESULT_REPLY) { 1918 agent_send_response(&response->mad.mad, &recv->grh, wc, 1919 port_priv->device, port_num, qp_info->qp->qp_num); 1920 goto out; 1921 } 1922 } 1923 } 1924 1925 mad_agent = find_mad_agent(port_priv, &recv->mad.mad); 1926 if (mad_agent) { 1927 //ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); 1928 1929 /** recv is freed up in error cases in ib_mad_complete_recv 1930 * or via recv_handler in ib_mad_complete_recv()*/ 1931 1932 recv = NULL; 1933 } 1934 1935 out: 1936 /*Post another receive request for this QP*/ 1937 /*if (response) { 1938 ib_mad_post_receive_mads(qp_info, response); 1939 if (recv) 1940 kmem_cache_free(ib_mad_cache, recv); 1941 } else 1942 ib_mad_post_receive_mads(qp_info, recv);*/ 1943 return; 1944} 1945/* 1946 static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) 1947 { 1948 struct ib_mad_send_wr_private *mad_send_wr; 1949 1950 if (list_empty(&mad_agent_priv->wait_list)) { 1951 del_timer(&mad_agent_priv->timeout_timer); 1952 } else { 1953 mad_send_wr = list_entry(mad_agent_priv->wait_list.next, 1954 struct ib_mad_send_wr_private, 1955 agent_list); 1956 1957 if (time_after(mad_agent_priv->timeout, 1958 mad_send_wr->timeout)) { 1959 mad_agent_priv->timeout = mad_send_wr->timeout; 1960 mod_timer(&mad_agent_priv->timeout_timer, 1961 mad_send_wr->timeout); 1962 } 1963 } 1964 } 1965 */ 1966/*static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) { 1967 struct ib_mad_agent_private *mad_agent_priv; 1968 struct ib_mad_send_wr_private *temp_mad_send_wr; 1969 struct list_head *list_item; 1970 unsigned long delay; 1971 1972 mad_agent_priv = mad_send_wr->mad_agent_priv; 1973 list_del(&mad_send_wr->agent_list); 1974 1975 delay = mad_send_wr->timeout; 1976 mad_send_wr->timeout += jiffies; 1977 1978 if (delay) { 1979 list_for_each_prev(list_item, &mad_agent_priv->wait_list) 1980 { 1981 temp_mad_send_wr = list_entry(list_item, 1982 struct ib_mad_send_wr_private, agent_list); 1983 if (time_after(mad_send_wr->timeout, temp_mad_send_wr->timeout)) 1984 break; 1985 } 1986 } else 1987 list_item = &mad_agent_priv->wait_list; 1988 list_add(&mad_send_wr->agent_list, list_item); 1989 1990 Reschedule a work item if we have a shorter timeout 1991 if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) 1992 mod_timer(&mad_agent_priv->timeout_timer, mad_send_wr->timeout); 1993 }*/ 1994/* 1995 void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, 1996 int timeout_ms) 1997 { 1998 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); 1999 wait_for_response(mad_send_wr); 2000 } 2001 2002 2003 * Process a send work completion 2004 */ 2005/*void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, 2006 struct ib_mad_send_wc *mad_send_wc) { 2007 struct ib_mad_agent_private *mad_agent_priv; 2008 unsigned long flags; 2009 int ret; 2010 2011 mad_agent_priv = mad_send_wr->mad_agent_priv; 2012 spin_lock_irqsave(&mad_agent_priv->lock, flags); 2013 if (mad_agent_priv->agent.rmpp_version) { 2014 ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); 2015 if (ret == IB_RMPP_RESULT_CONSUMED) 2016 goto done; 2017 } else 2018 ret = IB_RMPP_RESULT_UNHANDLED; 2019 2020 if (mad_send_wc->status != IB_WC_SUCCESS 2021 && mad_send_wr->status == IB_WC_SUCCESS) { 2022 mad_send_wr->status = mad_send_wc->status; 2023 mad_send_wr->refcount -= (mad_send_wr->timeout > 0); 2024 } 2025 2026 if (--mad_send_wr->refcount > 0) { 2027 if (mad_send_wr->refcount == 1 && mad_send_wr->timeout 2028 && mad_send_wr->status == IB_WC_SUCCESS) { 2029 wait_for_response(mad_send_wr); 2030 } 2031 goto done; 2032 } 2033 2034 Remove send from MAD agent and notify client of completion 2035 list_del(&mad_send_wr->agent_list); 2036 adjust_timeout(mad_agent_priv); 2037 spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 2038 2039 if (mad_send_wr->status != IB_WC_SUCCESS) 2040 mad_send_wc->status = mad_send_wr->status; 2041 if (ret == IB_RMPP_RESULT_INTERNAL) 2042 ib_rmpp_send_handler(mad_send_wc); 2043 else 2044 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, mad_send_wc); 2045 2046 Release reference on agent taken when sending 2047 deref_mad_agent(mad_agent_priv); 2048 return; 2049 done: spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 2050 }*/ 2051 2052/*static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, 2053 struct ib_wc *wc) { 2054 struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; 2055 struct ib_mad_list_head *mad_list; 2056 struct ib_mad_qp_info *qp_info; 2057 struct ib_mad_queue *send_queue; 2058 struct ib_send_wr *bad_send_wr; 2059 struct ib_mad_send_wc mad_send_wc; 2060 unsigned long flags; 2061 int ret; 2062 2063 mad_list = (struct ib_mad_list_head *) (unsigned long) wc->wr_id; 2064 mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, 2065 mad_list); 2066 send_queue = mad_list->mad_queue; 2067 qp_info = send_queue->qp_info; 2068 2069 retry: ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, 2070 mad_send_wr->header_mapping, mad_send_wr->sg_list[0].length, 2071 DMA_TO_DEVICE); 2072 ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, 2073 mad_send_wr->payload_mapping, mad_send_wr->sg_list[1].length, 2074 DMA_TO_DEVICE); 2075 queued_send_wr = NULL; 2076 spin_lock_irqsave(&send_queue->lock, flags); 2077 list_del(&mad_list->list); 2078 2079 Move queued send to the send queue 2080 if (send_queue->count-- > send_queue->max_active) { 2081 mad_list = container_of(qp_info->overflow_list.next, 2082 struct ib_mad_list_head, list); 2083 queued_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, 2084 mad_list); 2085 list_move_tail(&mad_list->list, &send_queue->list); 2086 } 2087 spin_unlock_irqrestore(&send_queue->lock, flags); 2088 2089 mad_send_wc.send_buf = &mad_send_wr->send_buf; 2090 mad_send_wc.status = wc->status; 2091 mad_send_wc.vendor_err = wc->vendor_err; 2092 if (atomic_read(&qp_info->snoop_count)) 2093 snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, 2094 IB_MAD_SNOOP_SEND_COMPLETIONS); 2095 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); 2096 2097 if (queued_send_wr) { 2098 ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, &bad_send_wr); 2099 if (ret) { 2100 printf("ib_post_send failed: %d\n", ret); 2101 mad_send_wr = queued_send_wr; 2102 wc->status = IB_WC_LOC_QP_OP_ERR; 2103 goto retry; 2104 } 2105 } 2106 }*/ 2107/* 2108 static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) 2109 { 2110 struct ib_mad_send_wr_private *mad_send_wr; 2111 struct ib_mad_list_head *mad_list; 2112 unsigned long flags; 2113 2114 spin_lock_irqsave(&qp_info->send_queue.lock, flags); 2115 list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { 2116 mad_send_wr = container_of(mad_list, 2117 struct ib_mad_send_wr_private, 2118 mad_list); 2119 mad_send_wr->retry = 1; 2120 } 2121 spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); 2122 } 2123 2124 static void mad_error_handler(struct ib_mad_port_private *port_priv, 2125 struct ib_wc *wc) 2126 { 2127 struct ib_mad_list_head *mad_list; 2128 struct ib_mad_qp_info *qp_info; 2129 struct ib_mad_send_wr_private *mad_send_wr; 2130 int ret; 2131 2132 Determine if failure was a send or receive 2133 mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; 2134 qp_info = mad_list->mad_queue->qp_info; 2135 if (mad_list->mad_queue == &qp_info->recv_queue) 2136 2137 * Receive errors indicate that the QP has entered the error 2138 * state - error handling/shutdown code will cleanup 2139 2140 return; 2141 2142 2143 * Send errors will transition the QP to SQE - move 2144 * QP to RTS and repost flushed work requests 2145 2146 mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, 2147 mad_list); 2148 if (wc->status == IB_WC_WR_FLUSH_ERR) { 2149 if (mad_send_wr->retry) { 2150 Repost send 2151 struct ib_send_wr *bad_send_wr; 2152 2153 mad_send_wr->retry = 0; 2154 ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, 2155 &bad_send_wr); 2156 if (ret) 2157 ib_mad_send_done_handler(port_priv, wc); 2158 } else 2159 ib_mad_send_done_handler(port_priv, wc); 2160 } else { 2161 struct ib_qp_attr *attr; 2162 2163 Transition QP to RTS and fail offending send 2164 attr = malloc(sizeof *attr); 2165 if (attr) { 2166 attr->qp_state = IB_QPS_RTS; 2167 attr->cur_qp_state = IB_QPS_SQE; 2168 ret = ib_modify_qp(qp_info->qp, attr, 2169 IB_QP_STATE | IB_QP_CUR_STATE); 2170 free(attr); 2171 if (ret) 2172 printf( "mad_error_handler - " 2173 "ib_modify_qp to RTS : %d\n", ret); 2174 else 2175 mark_sends_for_retry(qp_info); 2176 } 2177 ib_mad_send_done_handler(port_priv, wc); 2178 } 2179 } 2180 2181 2182 * IB MAD completion callback 2183 */ 2184static void ib_mad_completion_handler(struct work_struct *work) { 2185 struct ib_mad_port_private *port_priv; 2186 struct ib_wc wc; 2187 2188 port_priv = container_of(work, struct ib_mad_port_private, work); 2189 ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); 2190 2191 while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { 2192 if (wc.status == IB_WC_SUCCESS) { 2193 switch (wc.opcode) { 2194 case IB_WC_SEND: 2195 //ib_mad_send_done_handler(port_priv, &wc); 2196 break; 2197 case IB_WC_RECV: 2198 ib_mad_recv_done_handler(port_priv, &wc); 2199 break; 2200 default: 2201 assert(0); 2202 break; 2203 } 2204 } /*else 2205 mad_error_handler(port_priv, &wc);*/ 2206 } 2207} 2208/* 2209 static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) 2210 { 2211 unsigned long flags; 2212 struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; 2213 struct ib_mad_send_wc mad_send_wc; 2214 struct list_head cancel_list; 2215 2216 INIT_LIST_HEAD(&cancel_list); 2217 2218 spin_lock_irqsave(&mad_agent_priv->lock, flags); 2219 list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, 2220 &mad_agent_priv->send_list, agent_list) { 2221 if (mad_send_wr->status == IB_WC_SUCCESS) { 2222 mad_send_wr->status = IB_WC_WR_FLUSH_ERR; 2223 mad_send_wr->refcount -= (mad_send_wr->timeout > 0); 2224 } 2225 } 2226 2227 Empty wait list to prevent receives from finding a request 2228 list_splice_init(&mad_agent_priv->wait_list, &cancel_list); 2229 spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 2230 2231 Report all cancelled requests 2232 mad_send_wc.status = IB_WC_WR_FLUSH_ERR; 2233 mad_send_wc.vendor_err = 0; 2234 2235 list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, 2236 &cancel_list, agent_list) { 2237 mad_send_wc.send_buf = &mad_send_wr->send_buf; 2238 list_del(&mad_send_wr->agent_list); 2239 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, 2240 &mad_send_wc); 2241 atomic_dec(&mad_agent_priv->refcount); 2242 } 2243 } 2244 2245 static struct ib_mad_send_wr_private* 2246 find_send_wr(struct ib_mad_agent_private *mad_agent_priv, 2247 struct ib_mad_send_buf *send_buf) 2248 { 2249 struct ib_mad_send_wr_private *mad_send_wr; 2250 2251 list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, 2252 agent_list) { 2253 if (&mad_send_wr->send_buf == send_buf) 2254 return mad_send_wr; 2255 } 2256 2257 list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, 2258 agent_list) { 2259 if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && 2260 &mad_send_wr->send_buf == send_buf) 2261 return mad_send_wr; 2262 } 2263 return NULL; 2264 } 2265 2266 int ib_modify_mad(struct ib_mad_agent *mad_agent, 2267 struct ib_mad_send_buf *send_buf, u32 timeout_ms) 2268 { 2269 struct ib_mad_agent_private *mad_agent_priv; 2270 struct ib_mad_send_wr_private *mad_send_wr; 2271 unsigned long flags; 2272 int active; 2273 2274 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, 2275 agent); 2276 spin_lock_irqsave(&mad_agent_priv->lock, flags); 2277 mad_send_wr = find_send_wr(mad_agent_priv, send_buf); 2278 if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { 2279 spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 2280 return -EINVAL; 2281 } 2282 2283 active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); 2284 if (!timeout_ms) { 2285 mad_send_wr->status = IB_WC_WR_FLUSH_ERR; 2286 mad_send_wr->refcount -= (mad_send_wr->timeout > 0); 2287 } 2288 2289 mad_send_wr->send_buf.timeout_ms = timeout_ms; 2290 if (active) 2291 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); 2292 else 2293 ib_reset_mad_timeout(mad_send_wr, timeout_ms); 2294 2295 spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 2296 return 0; 2297 } 2298 EXPORT_SYMBOL(ib_modify_mad); 2299 2300 void ib_cancel_mad(struct ib_mad_agent *mad_agent, 2301 struct ib_mad_send_buf *send_buf) 2302 { 2303 ib_modify_mad(mad_agent, send_buf, 0); 2304 } 2305 EXPORT_SYMBOL(ib_cancel_mad); 2306 2307 static void local_completions(struct work_struct *work) 2308 { 2309 struct ib_mad_agent_private *mad_agent_priv; 2310 struct ib_mad_local_private *local; 2311 struct ib_mad_agent_private *recv_mad_agent; 2312 unsigned long flags; 2313 int free_mad; 2314 struct ib_wc wc; 2315 struct ib_mad_send_wc mad_send_wc; 2316 2317 mad_agent_priv = 2318 container_of(work, struct ib_mad_agent_private, local_work); 2319 2320 spin_lock_irqsave(&mad_agent_priv->lock, flags); 2321 while (!list_empty(&mad_agent_priv->local_list)) { 2322 local = list_entry(mad_agent_priv->local_list.next, 2323 struct ib_mad_local_private, 2324 completion_list); 2325 list_del(&local->completion_list); 2326 spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 2327 free_mad = 0; 2328 if (local->mad_priv) { 2329 recv_mad_agent = local->recv_mad_agent; 2330 if (!recv_mad_agent) { 2331 printf( "No receive MAD agent for local completion\n"); 2332 free_mad = 1; 2333 goto local_send_completion; 2334 } 2335 2336 2337 * Defined behavior is to complete response 2338 * before request 2339 2340 build_smp_wc(recv_mad_agent->agent.qp, 2341 (unsigned long) local->mad_send_wr, 2342 be16_to_cpu(IB_LID_PERMISSIVE), 2343 0, recv_mad_agent->agent.port_num, &wc); 2344 2345 local->mad_priv->header.recv_wc.wc = &wc; 2346 local->mad_priv->header.recv_wc.mad_len = 2347 sizeof(struct ib_mad); 2348 INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); 2349 list_add(&local->mad_priv->header.recv_wc.recv_buf.list, 2350 &local->mad_priv->header.recv_wc.rmpp_list); 2351 local->mad_priv->header.recv_wc.recv_buf.grh = NULL; 2352 local->mad_priv->header.recv_wc.recv_buf.mad = 2353 &local->mad_priv->mad.mad; 2354 if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) 2355 snoop_recv(recv_mad_agent->qp_info, 2356 &local->mad_priv->header.recv_wc, 2357 IB_MAD_SNOOP_RECVS); 2358 recv_mad_agent->agent.recv_handler( 2359 &recv_mad_agent->agent, 2360 &local->mad_priv->header.recv_wc); 2361 spin_lock_irqsave(&recv_mad_agent->lock, flags); 2362 atomic_dec(&recv_mad_agent->refcount); 2363 spin_unlock_irqrestore(&recv_mad_agent->lock, flags); 2364 } 2365 2366 local_send_completion: 2367 Complete send 2368 mad_send_wc.status = IB_WC_SUCCESS; 2369 mad_send_wc.vendor_err = 0; 2370 mad_send_wc.send_buf = &local->mad_send_wr->send_buf; 2371 if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) 2372 snoop_send(mad_agent_priv->qp_info, 2373 &local->mad_send_wr->send_buf, 2374 &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); 2375 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, 2376 &mad_send_wc); 2377 2378 spin_lock_irqsave(&mad_agent_priv->lock, flags); 2379 atomic_dec(&mad_agent_priv->refcount); 2380 if (free_mad) 2381 kmem_cache_free(ib_mad_cache, local->mad_priv); 2382 free(local); 2383 } 2384 spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 2385 } 2386 2387 static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) 2388 { 2389 int ret; 2390 2391 if (!mad_send_wr->retries_left) 2392 return -ETIMEDOUT; 2393 2394 mad_send_wr->retries_left--; 2395 mad_send_wr->send_buf.retries++; 2396 2397 mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); 2398 2399 if (mad_send_wr->mad_agent_priv->agent.rmpp_version) { 2400 ret = ib_retry_rmpp(mad_send_wr); 2401 switch (ret) { 2402 case IB_RMPP_RESULT_UNHANDLED: 2403 ret = ib_send_mad(mad_send_wr); 2404 break; 2405 case IB_RMPP_RESULT_CONSUMED: 2406 ret = 0; 2407 break; 2408 default: 2409 ret = -ECOMM; 2410 break; 2411 } 2412 } else 2413 ret = ib_send_mad(mad_send_wr); 2414 2415 if (!ret) { 2416 mad_send_wr->refcount++; 2417 list_add_tail(&mad_send_wr->agent_list, 2418 &mad_send_wr->mad_agent_priv->send_list); 2419 } 2420 return ret; 2421 } 2422 2423 static void timeout_sends(struct work_struct *work) 2424 { 2425 struct ib_mad_agent_private *mad_agent_priv; 2426 struct ib_mad_send_wr_private *mad_send_wr; 2427 struct ib_mad_send_wc mad_send_wc; 2428 unsigned long flags; 2429 2430 mad_agent_priv = container_of(work, struct ib_mad_agent_private, 2431 timeout_work); 2432 mad_send_wc.vendor_err = 0; 2433 2434 spin_lock_irqsave(&mad_agent_priv->lock, flags); 2435 while (!list_empty(&mad_agent_priv->wait_list)) { 2436 mad_send_wr = list_entry(mad_agent_priv->wait_list.next, 2437 struct ib_mad_send_wr_private, 2438 agent_list); 2439 2440 if (time_after(mad_send_wr->timeout, jiffies)) { 2441 mod_timer(&mad_agent_priv->timeout_timer, 2442 mad_send_wr->timeout); 2443 break; 2444 } 2445 2446 list_del(&mad_send_wr->agent_list); 2447 if (mad_send_wr->status == IB_WC_SUCCESS && 2448 !retry_send(mad_send_wr)) 2449 continue; 2450 2451 spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 2452 2453 if (mad_send_wr->status == IB_WC_SUCCESS) 2454 mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; 2455 else 2456 mad_send_wc.status = mad_send_wr->status; 2457 mad_send_wc.send_buf = &mad_send_wr->send_buf; 2458 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, 2459 &mad_send_wc); 2460 2461 atomic_dec(&mad_agent_priv->refcount); 2462 spin_lock_irqsave(&mad_agent_priv->lock, flags); 2463 } 2464 spin_unlock_irqrestore(&mad_agent_priv->lock, flags); 2465 } 2466 */ 2467static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg) { 2468 struct ib_mad_port_private *port_priv = cq->cq_context; 2469 /*unsigned long flags;*/ 2470 2471 printf("ib_mad_completion_handler\n"); 2472 2473 /*spin_lock_irqsave(&ib_mad_port_list_lock, flags);*/ 2474 if (!list_empty(&port_priv->port_list)) 2475 queue_work(port_priv->wq, &port_priv->work); 2476 /*ib_mad_completion_handler(port_priv);*/ 2477 /*spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);*/ 2478} 2479/* 2480 2481 * Allocate receive MADs and post receive WRs for them 2482 */ 2483static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, 2484 struct ib_mad_private *mad) { 2485 /*unsigned long flags;*/ 2486 int post, ret; 2487 struct ib_mad_private *mad_priv; 2488 struct ib_sge sg_list; 2489 struct ib_recv_wr recv_wr, *bad_recv_wr; 2490 struct ib_mad_queue *recv_queue = &qp_info->recv_queue; 2491 genpaddr_t t; 2492 2493 /*Initialize common scatter list fields*/ 2494 sg_list.length = sizeof *mad_priv - sizeof mad_priv->header; 2495 sg_list.lkey = (*qp_info->port_priv->mr).lkey; 2496 2497 /*Initialize common receive WR fields*/ 2498 recv_wr.next = NULL; 2499 recv_wr.sg_list = &sg_list; 2500 recv_wr.num_sge = 1; 2501 2502 do { 2503 /*Allocate and map receive buffer*/ 2504 if (mad) { 2505 mad_priv = mad; 2506 mad = NULL; 2507 } else { 2508 mad_priv = dma_alloc(sizeof *mad_priv, &t); //kmem_cache_alloc(ib_mad_cache); 2509 if (!mad_priv) { 2510 printf("No memory for receive buffer\n"); 2511 ret = -ENOMEM; 2512 break; 2513 } 2514 } 2515 sg_list.addr = t + sizeof mad_priv->header;/*ib_dma_map_single(qp_info->port_priv->device, 2516 &mad_priv->grh, sizeof *mad_priv - sizeof mad_priv->header, 2517 DMA_FROM_DEVICE);*/ 2518 mad_priv->header.mapping = sg_list.addr; 2519 recv_wr.wr_id = (unsigned long) &mad_priv->header.mad_list; 2520 mad_priv->header.mad_list.mad_queue = recv_queue; 2521 2522 /*Post receive WR*/ 2523 /*spin_lock_irqsave(&recv_queue->lock, flags);*/ 2524 post = (++recv_queue->count < recv_queue->max_active); 2525 list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); 2526 /*spin_unlock_irqrestore(&recv_queue->lock, flags);*/ 2527 ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); 2528 if (ret) { 2529 /*spin_lock_irqsave(&recv_queue->lock, flags);*/ 2530 list_del(&mad_priv->header.mad_list.list); 2531 recv_queue->count--; 2532 /*spin_unlock_irqrestore(&recv_queue->lock, flags);*/ 2533 /*TODO: cleanup*/ 2534 assert(0); 2535 /*ib_dma_unmap_single(qp_info->port_priv->device, 2536 mad_priv->header.mapping, 2537 sizeof *mad_priv - sizeof mad_priv->header, 2538 DMA_FROM_DEVICE);*/ 2539 free(mad_priv); 2540 printf("ib_post_recv failed: %d\n", ret); 2541 break; 2542 } 2543 } while (post); 2544 2545 return ret; 2546} 2547/* 2548 2549 * Return all the posted receive MADs 2550 2551 static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) 2552 { 2553 struct ib_mad_private_header *mad_priv_hdr; 2554 struct ib_mad_private *recv; 2555 struct ib_mad_list_head *mad_list; 2556 2557 if (!qp_info->qp) 2558 return; 2559 2560 while (!list_empty(&qp_info->recv_queue.list)) { 2561 2562 mad_list = list_entry(qp_info->recv_queue.list.next, 2563 struct ib_mad_list_head, list); 2564 mad_priv_hdr = container_of(mad_list, 2565 struct ib_mad_private_header, 2566 mad_list); 2567 recv = container_of(mad_priv_hdr, struct ib_mad_private, 2568 header); 2569 2570 Remove from posted receive MAD list 2571 list_del(&mad_list->list); 2572 2573 ib_dma_unmap_single(qp_info->port_priv->device, 2574 recv->header.mapping, 2575 sizeof(struct ib_mad_private) - 2576 sizeof(struct ib_mad_private_header), 2577 DMA_FROM_DEVICE); 2578 kmem_cache_free(ib_mad_cache, recv); 2579 } 2580 2581 qp_info->recv_queue.count = 0; 2582 } 2583 2584 2585 * Start the port 2586 */ 2587static int ib_mad_port_start(struct ib_mad_port_private *port_priv) { 2588 int ret, i; 2589 struct ib_qp_attr *attr; 2590 struct ib_qp *qp; 2591 2592 attr = malloc(sizeof *attr); 2593 if (!attr) { 2594 printf("Couldn't malloc ib_qp_attr\n"); 2595 return -ENOMEM; 2596 } 2597 2598 for (i = 0; i < IB_MAD_QPS_CORE; i++) { 2599 qp = port_priv->qp_info[i].qp; 2600 if (!qp) 2601 continue; 2602 2603 /** PKey index for QP1 is irrelevant but 2604 * one is needed for the Reset to Init transition*/ 2605 2606 attr->qp_state = IB_QPS_INIT; 2607 attr->pkey_index = 0; 2608 attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; 2609 ret = ib_modify_qp(qp, attr, 2610 IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY); 2611 if (ret) { 2612 printf("Couldn't change QP%d state to " 2613 "INIT: %d\n", i, ret); 2614 goto out; 2615 } 2616 2617 attr->qp_state = IB_QPS_RTR; 2618 ret = ib_modify_qp(qp, attr, IB_QP_STATE); 2619 if (ret) { 2620 printf("Couldn't change QP%d state to " 2621 "RTR: %d\n", i, ret); 2622 goto out; 2623 } 2624 2625 attr->qp_state = IB_QPS_RTS; 2626 attr->sq_psn = IB_MAD_SEND_Q_PSN; 2627 ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); 2628 if (ret) { 2629 printf("Couldn't change QP%d state to " 2630 "RTS: %d\n", i, ret); 2631 goto out; 2632 } 2633 } 2634 2635 ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); 2636 if (ret) { 2637 printf("Failed to request completion " 2638 "notification: %d\n", ret); 2639 goto out; 2640 } 2641 2642 for (i = 0; i < IB_MAD_QPS_CORE; i++) { 2643 if (!port_priv->qp_info[i].qp) 2644 continue; 2645 2646 ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); 2647 if (ret) { 2648 printf("Couldn't post receive WRs\n"); 2649 goto out; 2650 } 2651 } 2652 out: free(attr); 2653 return ret; 2654} 2655 2656static void qp_event_handler(struct ib_event *event, void *qp_context) { 2657 struct ib_mad_qp_info *qp_info = qp_context; 2658 2659 /*It's worse than that! He's dead, Jim!*/ 2660 printf("Fatal error (%d) on MAD QP (%d)\n", event->event, 2661 qp_info->qp->qp_num); 2662} 2663 2664static void init_mad_queue(struct ib_mad_qp_info *qp_info, 2665 struct ib_mad_queue *mad_queue) { 2666 mad_queue->qp_info = qp_info; 2667 mad_queue->count = 0; 2668 /*spin_lock_init(&mad_queue->lock);*/ 2669 INIT_LIST_HEAD(&mad_queue->list); 2670} 2671 2672static void init_mad_qp(struct ib_mad_port_private *port_priv, 2673 struct ib_mad_qp_info *qp_info) { 2674 qp_info->port_priv = port_priv; 2675 init_mad_queue(qp_info, &qp_info->send_queue); 2676 init_mad_queue(qp_info, &qp_info->recv_queue); 2677 INIT_LIST_HEAD(&qp_info->overflow_list); 2678 /*spin_lock_init(&qp_info->snoop_lock);*/ 2679 qp_info->snoop_table = NULL; 2680 qp_info->snoop_table_size = 0; 2681 /*atomic_set(&qp_info->snoop_count, 0);*/ 2682} 2683 2684static int create_mad_qp(struct ib_mad_qp_info *qp_info, 2685 enum ib_qp_type qp_type) { 2686 struct ib_qp_init_attr qp_init_attr; 2687 int ret; 2688 2689 memset(&qp_init_attr, 0, sizeof qp_init_attr); 2690 qp_init_attr.send_cq = qp_info->port_priv->cq; 2691 qp_init_attr.recv_cq = qp_info->port_priv->cq; 2692 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; 2693 qp_init_attr.cap.max_send_wr = mad_sendq_size; 2694 qp_init_attr.cap.max_recv_wr = mad_recvq_size; 2695 qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; 2696 qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; 2697 qp_init_attr.qp_type = qp_type; 2698 qp_init_attr.port_num = qp_info->port_priv->port_num; 2699 qp_init_attr.qp_context = qp_info; 2700 qp_init_attr.event_handler = qp_event_handler; 2701 qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); 2702 if (IS_ERR(qp_info->qp)) { 2703 printf("Couldn't create ib_mad QP%d\n", get_spl_qp_index(qp_type)); 2704 ret = PTR_ERR(qp_info->qp); 2705 goto error; 2706 } 2707 /*Use minimum queue sizes unless the CQ is resized*/ 2708 qp_info->send_queue.max_active = mad_sendq_size; 2709 qp_info->recv_queue.max_active = mad_recvq_size; 2710 return 0; 2711 2712 error: return ret; 2713} 2714/* 2715 static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) 2716 { 2717 if (!qp_info->qp) 2718 return; 2719 2720 ib_destroy_qp(qp_info->qp); 2721 free(qp_info->snoop_table); 2722 } 2723 2724 2725 * Open the port 2726 * Create the QP, PD, MR, and CQ if needed 2727 */ 2728static int ib_mad_port_open(struct ib_device *device, int port_num) { 2729 int ret, cq_size; 2730 struct ib_mad_port_private *port_priv; 2731 /*unsigned long flags;*/ 2732 char name[sizeof "ib_mad123"]; 2733 int has_smi; 2734 2735 /*Create new device info*/ 2736 port_priv = calloc(1, sizeof *port_priv); 2737 if (!port_priv) { 2738 printf("No memory for ib_mad_port_private\n"); 2739 return -ENOMEM; 2740 } 2741 2742 port_priv->device = device; 2743 port_priv->port_num = port_num; 2744 /*spin_lock_init(&port_priv->reg_lock);*/ 2745 INIT_LIST_HEAD(&port_priv->agent_list); 2746 init_mad_qp(port_priv, &port_priv->qp_info[0]); 2747 init_mad_qp(port_priv, &port_priv->qp_info[1]); 2748 2749 cq_size = mad_sendq_size + mad_recvq_size; 2750 has_smi = rdma_port_get_link_layer(device, port_num) 2751 == IB_LINK_LAYER_INFINIBAND; 2752 if (has_smi) 2753 cq_size *= 2; 2754 2755 port_priv->cq = ib_create_cq(port_priv->device, 2756 ib_mad_thread_completion_handler, 2757 NULL, port_priv, cq_size, 0); 2758 if (IS_ERR(port_priv->cq)) { 2759 printf("Couldn't create ib_mad CQ\n"); 2760 ret = PTR_ERR(port_priv->cq); 2761 goto error3; 2762 } 2763 2764 port_priv->pd = ib_alloc_pd(device); 2765 if (IS_ERR(port_priv->pd)) { 2766 printf("Couldn't create ib_mad PD\n"); 2767 ret = PTR_ERR(port_priv->pd); 2768 goto error4; 2769 } 2770 2771 port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); 2772 if (IS_ERR(port_priv->mr)) { 2773 printf("Couldn't get ib_mad DMA MR\n"); 2774 ret = PTR_ERR(port_priv->mr); 2775 goto error5; 2776 } 2777 2778 if (has_smi) { 2779 ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); 2780 if (ret) 2781 goto error6; 2782 } 2783 2784 ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); 2785 if (ret) 2786 goto error7; 2787 2788 snprintf(name, sizeof name, "ib_mad%d", port_num); 2789 port_priv->wq = create_singlethread_workqueue(name); 2790 if (!port_priv->wq) { 2791 ret = -ENOMEM; 2792 goto error8; 2793 } 2794 INIT_WORK(&port_priv->work, ib_mad_completion_handler); 2795 2796 if (!ib_mad_port_list.next) 2797 INIT_LIST_HEAD(&ib_mad_port_list); 2798 2799 /*spin_lock_irqsave(&ib_mad_port_list_lock, flags);*/ 2800 list_add_tail(&port_priv->port_list, &ib_mad_port_list); 2801 /*spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);*/ 2802 2803 ret = ib_mad_port_start(port_priv); 2804 if (ret) { 2805 printf("Couldn't start port\n"); 2806 goto error9; 2807 } 2808 2809 return 0; 2810 2811 /*TODO: cleanup*/ 2812 error9: /*spin_lock_irqsave(&ib_mad_port_list_lock, flags);*/ 2813 list_del_init(&port_priv->port_list); 2814 /*spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); 2815 2816 destroy_workqueue(port_priv->wq);*/ 2817 error8: /*destroy_mad_qp(&port_priv->qp_info[1]);*/ 2818 error7: /*destroy_mad_qp(&port_priv->qp_info[0]);*/ 2819 error6: /*ib_dereg_mr(port_priv->mr);*/ 2820 error5: /*ib_dealloc_pd(port_priv->pd);*/ 2821 error4: /*ib_destroy_cq(port_priv->cq);*/ 2822 /*cleanup_recv_queue(&port_priv->qp_info[1]); 2823 cleanup_recv_queue(&port_priv->qp_info[0]);*/ 2824 error3: free(port_priv); 2825 2826 return ret; 2827} 2828/* 2829 2830 * Close the port 2831 * If there are no classes using the port, free the port 2832 * resources (CQ, MR, PD, QP) and remove the port's info structure 2833 2834 static int ib_mad_port_close(struct ib_device *device, int port_num) 2835 { 2836 struct ib_mad_port_private *port_priv; 2837 unsigned long flags; 2838 2839 spin_lock_irqsave(&ib_mad_port_list_lock, flags); 2840 port_priv = __ib_get_mad_port(device, port_num); 2841 if (port_priv == NULL) { 2842 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); 2843 printf( "Port %d not found\n", port_num); 2844 return -ENODEV; 2845 } 2846 list_del_init(&port_priv->port_list); 2847 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); 2848 2849 destroy_workqueue(port_priv->wq); 2850 destroy_mad_qp(&port_priv->qp_info[1]); 2851 destroy_mad_qp(&port_priv->qp_info[0]); 2852 ib_dereg_mr(port_priv->mr); 2853 ib_dealloc_pd(port_priv->pd); 2854 ib_destroy_cq(port_priv->cq); 2855 cleanup_recv_queue(&port_priv->qp_info[1]); 2856 cleanup_recv_queue(&port_priv->qp_info[0]); 2857 XXX: Handle deallocation of MAD registration tables 2858 2859 free(port_priv); 2860 2861 return 0; 2862 } 2863 */ 2864void ib_mad_init_device(struct ib_device *device) { 2865 int start, end, i; 2866 2867 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 2868 return; 2869 2870 if (device->node_type == RDMA_NODE_IB_SWITCH) { 2871 start = 0; 2872 end = 0; 2873 } else { 2874 start = 1; 2875 end = device->phys_port_cnt; 2876 } 2877 2878 for (i = start; i <= end; i++) { 2879 if (ib_mad_port_open(device, i)) { 2880 printf("Couldn't open %s port %d\n", device->name, i); 2881 goto error; 2882 } 2883 if (ib_agent_port_open(device, i)) { 2884 printf("Couldn't open %s port %d " 2885 "for agents\n", device->name, i); 2886 goto error_agent; 2887 } 2888 } 2889 return; 2890 2891 /*TODO: cleanup*/ 2892 error_agent: /*if (ib_mad_port_close(device, i))*/ 2893 printf("Couldn't close %s port %d\n", device->name, i); 2894 2895 error: i--; 2896 2897 /*while (i >= start) { 2898 if (ib_agent_port_close(device, i)) 2899 printf("Couldn't close %s port %d " 2900 "for agents\n", device->name, i); 2901 if (ib_mad_port_close(device, i)) 2902 printf("Couldn't close %s port %d\n", device->name, i); 2903 i--; 2904 }*/ 2905} 2906/* 2907 static void ib_mad_remove_device(struct ib_device *device) 2908 { 2909 int i, num_ports, cur_port; 2910 2911 if (device->node_type == RDMA_NODE_IB_SWITCH) { 2912 num_ports = 1; 2913 cur_port = 0; 2914 } else { 2915 num_ports = device->phys_port_cnt; 2916 cur_port = 1; 2917 } 2918 for (i = 0; i < num_ports; i++, cur_port++) { 2919 if (ib_agent_port_close(device, cur_port)) 2920 printf( "Couldn't close %s port %d " 2921 "for agents\n", 2922 device->name, cur_port); 2923 if (ib_mad_port_close(device, cur_port)) 2924 printf( "Couldn't close %s port %d\n", 2925 device->name, cur_port); 2926 } 2927 } 2928 2929 static struct ib_client mad_client = { 2930 .name = "mad", 2931 .add = ib_mad_init_device, 2932 .remove = ib_mad_remove_device 2933 }; 2934 2935 static int __init ib_mad_init_module(void) 2936 { 2937 int ret; 2938 2939 mad_recvq_size = min(mad_recvq_size, IB_MAD_QP_MAX_SIZE); 2940 mad_recvq_size = max(mad_recvq_size, IB_MAD_QP_MIN_SIZE); 2941 2942 mad_sendq_size = min(mad_sendq_size, IB_MAD_QP_MAX_SIZE); 2943 mad_sendq_size = max(mad_sendq_size, IB_MAD_QP_MIN_SIZE); 2944 2945 spin_lock_init(&ib_mad_port_list_lock); 2946 2947 ib_mad_cache = kmem_cache_create("ib_mad", 2948 sizeof(struct ib_mad_private), 2949 0, 2950 SLAB_HWCACHE_ALIGN, 2951 NULL); 2952 if (!ib_mad_cache) { 2953 printf( "Couldn't create ib_mad cache\n"); 2954 ret = -ENOMEM; 2955 goto error1; 2956 } 2957 2958 INIT_LIST_HEAD(&ib_mad_port_list); 2959 2960 if (ib_register_client(&mad_client)) { 2961 printf( "Couldn't register ib_mad client\n"); 2962 ret = -EINVAL; 2963 goto error2; 2964 } 2965 2966 return 0; 2967 2968 error2: 2969 kmem_cache_destroy(ib_mad_cache); 2970 error1: 2971 return ret; 2972 } 2973 2974 static void __exit ib_mad_cleanup_module(void) 2975 { 2976 ib_unregister_client(&mad_client); 2977 kmem_cache_destroy(ib_mad_cache); 2978 } 2979 2980 module_init(ib_mad_init_module); 2981 module_exit(ib_mad_cleanup_module); 2982 2983 */ 2984