1 /* 2 * Copyright (c) 2004 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved. 4 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 5 * Copyright (c) 2008 Cisco. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #define pr_fmt(fmt) "user_mad: " fmt 37 38 #include <linux/module.h> 39 #include <linux/init.h> 40 #include <linux/device.h> 41 #include <linux/err.h> 42 #include <linux/fs.h> 43 #include <linux/cdev.h> 44 #include <linux/dma-mapping.h> 45 #include <linux/poll.h> 46 #include <linux/mutex.h> 47 #include <linux/kref.h> 48 #include <linux/compat.h> 49 #include <linux/sched.h> 50 #include <linux/semaphore.h> 51 #include <linux/slab.h> 52 53 #include <linux/uaccess.h> 54 55 #include <rdma/ib_mad.h> 56 #include <rdma/ib_user_mad.h> 57 58 MODULE_AUTHOR("Roland Dreier"); 59 MODULE_DESCRIPTION("InfiniBand userspace MAD packet access"); 60 MODULE_LICENSE("Dual BSD/GPL"); 61 62 enum { 63 IB_UMAD_MAX_PORTS = 64, 64 IB_UMAD_MAX_AGENTS = 32, 65 66 IB_UMAD_MAJOR = 231, 67 IB_UMAD_MINOR_BASE = 0 68 }; 69 70 /* 71 * Our lifetime rules for these structs are the following: 72 * device special file is opened, we take a reference on the 73 * ib_umad_port's struct ib_umad_device. We drop these 74 * references in the corresponding close(). 75 * 76 * In addition to references coming from open character devices, there 77 * is one more reference to each ib_umad_device representing the 78 * module's reference taken when allocating the ib_umad_device in 79 * ib_umad_add_one(). 80 * 81 * When destroying an ib_umad_device, we drop the module's reference. 82 */ 83 84 struct ib_umad_port { 85 struct cdev cdev; 86 struct device *dev; 87 88 struct cdev sm_cdev; 89 struct device *sm_dev; 90 struct semaphore sm_sem; 91 92 struct mutex file_mutex; 93 struct list_head file_list; 94 95 struct ib_device *ib_dev; 96 struct ib_umad_device *umad_dev; 97 int dev_num; 98 u8 port_num; 99 }; 100 101 struct ib_umad_device { 102 struct kobject kobj; 103 struct ib_umad_port port[0]; 104 }; 105 106 struct ib_umad_file { 107 struct mutex mutex; 108 struct ib_umad_port *port; 109 struct list_head recv_list; 110 struct list_head send_list; 111 struct list_head port_list; 112 spinlock_t send_lock; 113 wait_queue_head_t recv_wait; 114 struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS]; 115 int agents_dead; 116 u8 use_pkey_index; 117 u8 already_used; 118 }; 119 120 struct ib_umad_packet { 121 struct ib_mad_send_buf *msg; 122 struct ib_mad_recv_wc *recv_wc; 123 struct list_head list; 124 int length; 125 struct ib_user_mad mad; 126 }; 127 128 static struct class *umad_class; 129 130 static const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE); 131 132 static DEFINE_SPINLOCK(port_lock); 133 static DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS); 134 135 static void ib_umad_add_one(struct ib_device *device); 136 static void ib_umad_remove_one(struct ib_device *device, void *client_data); 137 138 static void ib_umad_release_dev(struct kobject *kobj) 139 { 140 struct ib_umad_device *dev = 141 container_of(kobj, struct ib_umad_device, kobj); 142 143 kfree(dev); 144 } 145 146 static struct kobj_type ib_umad_dev_ktype = { 147 .release = ib_umad_release_dev, 148 }; 149 150 static int hdr_size(struct ib_umad_file *file) 151 { 152 return file->use_pkey_index ? sizeof (struct ib_user_mad_hdr) : 153 sizeof (struct ib_user_mad_hdr_old); 154 } 155 156 /* caller must hold file->mutex */ 157 static struct ib_mad_agent *__get_agent(struct ib_umad_file *file, int id) 158 { 159 return file->agents_dead ? NULL : file->agent[id]; 160 } 161 162 static int queue_packet(struct ib_umad_file *file, 163 struct ib_mad_agent *agent, 164 struct ib_umad_packet *packet) 165 { 166 int ret = 1; 167 168 mutex_lock(&file->mutex); 169 170 for (packet->mad.hdr.id = 0; 171 packet->mad.hdr.id < IB_UMAD_MAX_AGENTS; 172 packet->mad.hdr.id++) 173 if (agent == __get_agent(file, packet->mad.hdr.id)) { 174 list_add_tail(&packet->list, &file->recv_list); 175 wake_up_interruptible(&file->recv_wait); 176 ret = 0; 177 break; 178 } 179 180 mutex_unlock(&file->mutex); 181 182 return ret; 183 } 184 185 static void dequeue_send(struct ib_umad_file *file, 186 struct ib_umad_packet *packet) 187 { 188 spin_lock_irq(&file->send_lock); 189 list_del(&packet->list); 190 spin_unlock_irq(&file->send_lock); 191 } 192 193 static void send_handler(struct ib_mad_agent *agent, 194 struct ib_mad_send_wc *send_wc) 195 { 196 struct ib_umad_file *file = agent->context; 197 struct ib_umad_packet *packet = send_wc->send_buf->context[0]; 198 199 dequeue_send(file, packet); 200 rdma_destroy_ah(packet->msg->ah); 201 ib_free_send_mad(packet->msg); 202 203 if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) { 204 packet->length = IB_MGMT_MAD_HDR; 205 packet->mad.hdr.status = ETIMEDOUT; 206 if (!queue_packet(file, agent, packet)) 207 return; 208 } 209 kfree(packet); 210 } 211 212 static void recv_handler(struct ib_mad_agent *agent, 213 struct ib_mad_send_buf *send_buf, 214 struct ib_mad_recv_wc *mad_recv_wc) 215 { 216 struct ib_umad_file *file = agent->context; 217 struct ib_umad_packet *packet; 218 219 if (mad_recv_wc->wc->status != IB_WC_SUCCESS) 220 goto err1; 221 222 packet = kzalloc(sizeof *packet, GFP_KERNEL); 223 if (!packet) 224 goto err1; 225 226 packet->length = mad_recv_wc->mad_len; 227 packet->recv_wc = mad_recv_wc; 228 229 packet->mad.hdr.status = 0; 230 packet->mad.hdr.length = hdr_size(file) + mad_recv_wc->mad_len; 231 packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp); 232 packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid); 233 packet->mad.hdr.sl = mad_recv_wc->wc->sl; 234 packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits; 235 packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index; 236 packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH); 237 if (packet->mad.hdr.grh_present) { 238 struct rdma_ah_attr ah_attr; 239 const struct ib_global_route *grh; 240 241 ib_init_ah_from_wc(agent->device, agent->port_num, 242 mad_recv_wc->wc, mad_recv_wc->recv_buf.grh, 243 &ah_attr); 244 245 grh = rdma_ah_read_grh(&ah_attr); 246 packet->mad.hdr.gid_index = grh->sgid_index; 247 packet->mad.hdr.hop_limit = grh->hop_limit; 248 packet->mad.hdr.traffic_class = grh->traffic_class; 249 memcpy(packet->mad.hdr.gid, &grh->dgid, 16); 250 packet->mad.hdr.flow_label = cpu_to_be32(grh->flow_label); 251 } 252 253 if (queue_packet(file, agent, packet)) 254 goto err2; 255 return; 256 257 err2: 258 kfree(packet); 259 err1: 260 ib_free_recv_mad(mad_recv_wc); 261 } 262 263 static ssize_t copy_recv_mad(struct ib_umad_file *file, char __user *buf, 264 struct ib_umad_packet *packet, size_t count) 265 { 266 struct ib_mad_recv_buf *recv_buf; 267 int left, seg_payload, offset, max_seg_payload; 268 size_t seg_size; 269 270 recv_buf = &packet->recv_wc->recv_buf; 271 seg_size = packet->recv_wc->mad_seg_size; 272 273 /* We need enough room to copy the first (or only) MAD segment. */ 274 if ((packet->length <= seg_size && 275 count < hdr_size(file) + packet->length) || 276 (packet->length > seg_size && 277 count < hdr_size(file) + seg_size)) 278 return -EINVAL; 279 280 if (copy_to_user(buf, &packet->mad, hdr_size(file))) 281 return -EFAULT; 282 283 buf += hdr_size(file); 284 seg_payload = min_t(int, packet->length, seg_size); 285 if (copy_to_user(buf, recv_buf->mad, seg_payload)) 286 return -EFAULT; 287 288 if (seg_payload < packet->length) { 289 /* 290 * Multipacket RMPP MAD message. Copy remainder of message. 291 * Note that last segment may have a shorter payload. 292 */ 293 if (count < hdr_size(file) + packet->length) { 294 /* 295 * The buffer is too small, return the first RMPP segment, 296 * which includes the RMPP message length. 297 */ 298 return -ENOSPC; 299 } 300 offset = ib_get_mad_data_offset(recv_buf->mad->mad_hdr.mgmt_class); 301 max_seg_payload = seg_size - offset; 302 303 for (left = packet->length - seg_payload, buf += seg_payload; 304 left; left -= seg_payload, buf += seg_payload) { 305 recv_buf = container_of(recv_buf->list.next, 306 struct ib_mad_recv_buf, list); 307 seg_payload = min(left, max_seg_payload); 308 if (copy_to_user(buf, ((void *) recv_buf->mad) + offset, 309 seg_payload)) 310 return -EFAULT; 311 } 312 } 313 return hdr_size(file) + packet->length; 314 } 315 316 static ssize_t copy_send_mad(struct ib_umad_file *file, char __user *buf, 317 struct ib_umad_packet *packet, size_t count) 318 { 319 ssize_t size = hdr_size(file) + packet->length; 320 321 if (count < size) 322 return -EINVAL; 323 324 if (copy_to_user(buf, &packet->mad, hdr_size(file))) 325 return -EFAULT; 326 327 buf += hdr_size(file); 328 329 if (copy_to_user(buf, packet->mad.data, packet->length)) 330 return -EFAULT; 331 332 return size; 333 } 334 335 static ssize_t ib_umad_read(struct file *filp, char __user *buf, 336 size_t count, loff_t *pos) 337 { 338 struct ib_umad_file *file = filp->private_data; 339 struct ib_umad_packet *packet; 340 ssize_t ret; 341 342 if (count < hdr_size(file)) 343 return -EINVAL; 344 345 mutex_lock(&file->mutex); 346 347 while (list_empty(&file->recv_list)) { 348 mutex_unlock(&file->mutex); 349 350 if (filp->f_flags & O_NONBLOCK) 351 return -EAGAIN; 352 353 if (wait_event_interruptible(file->recv_wait, 354 !list_empty(&file->recv_list))) 355 return -ERESTARTSYS; 356 357 mutex_lock(&file->mutex); 358 } 359 360 packet = list_entry(file->recv_list.next, struct ib_umad_packet, list); 361 list_del(&packet->list); 362 363 mutex_unlock(&file->mutex); 364 365 if (packet->recv_wc) 366 ret = copy_recv_mad(file, buf, packet, count); 367 else 368 ret = copy_send_mad(file, buf, packet, count); 369 370 if (ret < 0) { 371 /* Requeue packet */ 372 mutex_lock(&file->mutex); 373 list_add(&packet->list, &file->recv_list); 374 mutex_unlock(&file->mutex); 375 } else { 376 if (packet->recv_wc) 377 ib_free_recv_mad(packet->recv_wc); 378 kfree(packet); 379 } 380 return ret; 381 } 382 383 static int copy_rmpp_mad(struct ib_mad_send_buf *msg, const char __user *buf) 384 { 385 int left, seg; 386 387 /* Copy class specific header */ 388 if ((msg->hdr_len > IB_MGMT_RMPP_HDR) && 389 copy_from_user(msg->mad + IB_MGMT_RMPP_HDR, buf + IB_MGMT_RMPP_HDR, 390 msg->hdr_len - IB_MGMT_RMPP_HDR)) 391 return -EFAULT; 392 393 /* All headers are in place. Copy data segments. */ 394 for (seg = 1, left = msg->data_len, buf += msg->hdr_len; left > 0; 395 seg++, left -= msg->seg_size, buf += msg->seg_size) { 396 if (copy_from_user(ib_get_rmpp_segment(msg, seg), buf, 397 min(left, msg->seg_size))) 398 return -EFAULT; 399 } 400 return 0; 401 } 402 403 static int same_destination(struct ib_user_mad_hdr *hdr1, 404 struct ib_user_mad_hdr *hdr2) 405 { 406 if (!hdr1->grh_present && !hdr2->grh_present) 407 return (hdr1->lid == hdr2->lid); 408 409 if (hdr1->grh_present && hdr2->grh_present) 410 return !memcmp(hdr1->gid, hdr2->gid, 16); 411 412 return 0; 413 } 414 415 static int is_duplicate(struct ib_umad_file *file, 416 struct ib_umad_packet *packet) 417 { 418 struct ib_umad_packet *sent_packet; 419 struct ib_mad_hdr *sent_hdr, *hdr; 420 421 hdr = (struct ib_mad_hdr *) packet->mad.data; 422 list_for_each_entry(sent_packet, &file->send_list, list) { 423 sent_hdr = (struct ib_mad_hdr *) sent_packet->mad.data; 424 425 if ((hdr->tid != sent_hdr->tid) || 426 (hdr->mgmt_class != sent_hdr->mgmt_class)) 427 continue; 428 429 /* 430 * No need to be overly clever here. If two new operations have 431 * the same TID, reject the second as a duplicate. This is more 432 * restrictive than required by the spec. 433 */ 434 if (!ib_response_mad(hdr)) { 435 if (!ib_response_mad(sent_hdr)) 436 return 1; 437 continue; 438 } else if (!ib_response_mad(sent_hdr)) 439 continue; 440 441 if (same_destination(&packet->mad.hdr, &sent_packet->mad.hdr)) 442 return 1; 443 } 444 445 return 0; 446 } 447 448 static ssize_t ib_umad_write(struct file *filp, const char __user *buf, 449 size_t count, loff_t *pos) 450 { 451 struct ib_umad_file *file = filp->private_data; 452 struct ib_umad_packet *packet; 453 struct ib_mad_agent *agent; 454 struct rdma_ah_attr ah_attr; 455 struct ib_ah *ah; 456 struct ib_rmpp_mad *rmpp_mad; 457 __be64 *tid; 458 int ret, data_len, hdr_len, copy_offset, rmpp_active; 459 u8 base_version; 460 461 if (count < hdr_size(file) + IB_MGMT_RMPP_HDR) 462 return -EINVAL; 463 464 packet = kzalloc(sizeof *packet + IB_MGMT_RMPP_HDR, GFP_KERNEL); 465 if (!packet) 466 return -ENOMEM; 467 468 if (copy_from_user(&packet->mad, buf, hdr_size(file))) { 469 ret = -EFAULT; 470 goto err; 471 } 472 473 if (packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) { 474 ret = -EINVAL; 475 goto err; 476 } 477 478 buf += hdr_size(file); 479 480 if (copy_from_user(packet->mad.data, buf, IB_MGMT_RMPP_HDR)) { 481 ret = -EFAULT; 482 goto err; 483 } 484 485 mutex_lock(&file->mutex); 486 487 agent = __get_agent(file, packet->mad.hdr.id); 488 if (!agent) { 489 ret = -EINVAL; 490 goto err_up; 491 } 492 493 memset(&ah_attr, 0, sizeof ah_attr); 494 ah_attr.type = rdma_ah_find_type(file->port->ib_dev, 495 file->port->port_num); 496 rdma_ah_set_dlid(&ah_attr, be16_to_cpu(packet->mad.hdr.lid)); 497 rdma_ah_set_sl(&ah_attr, packet->mad.hdr.sl); 498 rdma_ah_set_path_bits(&ah_attr, packet->mad.hdr.path_bits); 499 rdma_ah_set_port_num(&ah_attr, file->port->port_num); 500 if (packet->mad.hdr.grh_present) { 501 rdma_ah_set_grh(&ah_attr, NULL, 502 be32_to_cpu(packet->mad.hdr.flow_label), 503 packet->mad.hdr.gid_index, 504 packet->mad.hdr.hop_limit, 505 packet->mad.hdr.traffic_class); 506 rdma_ah_set_dgid_raw(&ah_attr, packet->mad.hdr.gid); 507 } 508 509 ah = rdma_create_ah(agent->qp->pd, &ah_attr); 510 if (IS_ERR(ah)) { 511 ret = PTR_ERR(ah); 512 goto err_up; 513 } 514 515 rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data; 516 hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); 517 518 if (ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) 519 && ib_mad_kernel_rmpp_agent(agent)) { 520 copy_offset = IB_MGMT_RMPP_HDR; 521 rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & 522 IB_MGMT_RMPP_FLAG_ACTIVE; 523 } else { 524 copy_offset = IB_MGMT_MAD_HDR; 525 rmpp_active = 0; 526 } 527 528 base_version = ((struct ib_mad_hdr *)&packet->mad.data)->base_version; 529 data_len = count - hdr_size(file) - hdr_len; 530 packet->msg = ib_create_send_mad(agent, 531 be32_to_cpu(packet->mad.hdr.qpn), 532 packet->mad.hdr.pkey_index, rmpp_active, 533 hdr_len, data_len, GFP_KERNEL, 534 base_version); 535 if (IS_ERR(packet->msg)) { 536 ret = PTR_ERR(packet->msg); 537 goto err_ah; 538 } 539 540 packet->msg->ah = ah; 541 packet->msg->timeout_ms = packet->mad.hdr.timeout_ms; 542 packet->msg->retries = packet->mad.hdr.retries; 543 packet->msg->context[0] = packet; 544 545 /* Copy MAD header. Any RMPP header is already in place. */ 546 memcpy(packet->msg->mad, packet->mad.data, IB_MGMT_MAD_HDR); 547 548 if (!rmpp_active) { 549 if (copy_from_user(packet->msg->mad + copy_offset, 550 buf + copy_offset, 551 hdr_len + data_len - copy_offset)) { 552 ret = -EFAULT; 553 goto err_msg; 554 } 555 } else { 556 ret = copy_rmpp_mad(packet->msg, buf); 557 if (ret) 558 goto err_msg; 559 } 560 561 /* 562 * Set the high-order part of the transaction ID to make MADs from 563 * different agents unique, and allow routing responses back to the 564 * original requestor. 565 */ 566 if (!ib_response_mad(packet->msg->mad)) { 567 tid = &((struct ib_mad_hdr *) packet->msg->mad)->tid; 568 *tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | 569 (be64_to_cpup(tid) & 0xffffffff)); 570 rmpp_mad->mad_hdr.tid = *tid; 571 } 572 573 if (!ib_mad_kernel_rmpp_agent(agent) 574 && ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) 575 && (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE)) { 576 spin_lock_irq(&file->send_lock); 577 list_add_tail(&packet->list, &file->send_list); 578 spin_unlock_irq(&file->send_lock); 579 } else { 580 spin_lock_irq(&file->send_lock); 581 ret = is_duplicate(file, packet); 582 if (!ret) 583 list_add_tail(&packet->list, &file->send_list); 584 spin_unlock_irq(&file->send_lock); 585 if (ret) { 586 ret = -EINVAL; 587 goto err_msg; 588 } 589 } 590 591 ret = ib_post_send_mad(packet->msg, NULL); 592 if (ret) 593 goto err_send; 594 595 mutex_unlock(&file->mutex); 596 return count; 597 598 err_send: 599 dequeue_send(file, packet); 600 err_msg: 601 ib_free_send_mad(packet->msg); 602 err_ah: 603 rdma_destroy_ah(ah); 604 err_up: 605 mutex_unlock(&file->mutex); 606 err: 607 kfree(packet); 608 return ret; 609 } 610 611 static unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait) 612 { 613 struct ib_umad_file *file = filp->private_data; 614 615 /* we will always be able to post a MAD send */ 616 unsigned int mask = POLLOUT | POLLWRNORM; 617 618 poll_wait(filp, &file->recv_wait, wait); 619 620 if (!list_empty(&file->recv_list)) 621 mask |= POLLIN | POLLRDNORM; 622 623 return mask; 624 } 625 626 static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg, 627 int compat_method_mask) 628 { 629 struct ib_user_mad_reg_req ureq; 630 struct ib_mad_reg_req req; 631 struct ib_mad_agent *agent = NULL; 632 int agent_id; 633 int ret; 634 635 mutex_lock(&file->port->file_mutex); 636 mutex_lock(&file->mutex); 637 638 if (!file->port->ib_dev) { 639 dev_notice(file->port->dev, 640 "ib_umad_reg_agent: invalid device\n"); 641 ret = -EPIPE; 642 goto out; 643 } 644 645 if (copy_from_user(&ureq, arg, sizeof ureq)) { 646 ret = -EFAULT; 647 goto out; 648 } 649 650 if (ureq.qpn != 0 && ureq.qpn != 1) { 651 dev_notice(file->port->dev, 652 "ib_umad_reg_agent: invalid QPN %d specified\n", 653 ureq.qpn); 654 ret = -EINVAL; 655 goto out; 656 } 657 658 for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) 659 if (!__get_agent(file, agent_id)) 660 goto found; 661 662 dev_notice(file->port->dev, 663 "ib_umad_reg_agent: Max Agents (%u) reached\n", 664 IB_UMAD_MAX_AGENTS); 665 ret = -ENOMEM; 666 goto out; 667 668 found: 669 if (ureq.mgmt_class) { 670 memset(&req, 0, sizeof(req)); 671 req.mgmt_class = ureq.mgmt_class; 672 req.mgmt_class_version = ureq.mgmt_class_version; 673 memcpy(req.oui, ureq.oui, sizeof req.oui); 674 675 if (compat_method_mask) { 676 u32 *umm = (u32 *) ureq.method_mask; 677 int i; 678 679 for (i = 0; i < BITS_TO_LONGS(IB_MGMT_MAX_METHODS); ++i) 680 req.method_mask[i] = 681 umm[i * 2] | ((u64) umm[i * 2 + 1] << 32); 682 } else 683 memcpy(req.method_mask, ureq.method_mask, 684 sizeof req.method_mask); 685 } 686 687 agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, 688 ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, 689 ureq.mgmt_class ? &req : NULL, 690 ureq.rmpp_version, 691 send_handler, recv_handler, file, 0); 692 if (IS_ERR(agent)) { 693 ret = PTR_ERR(agent); 694 agent = NULL; 695 goto out; 696 } 697 698 if (put_user(agent_id, 699 (u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) { 700 ret = -EFAULT; 701 goto out; 702 } 703 704 if (!file->already_used) { 705 file->already_used = 1; 706 if (!file->use_pkey_index) { 707 dev_warn(file->port->dev, 708 "process %s did not enable P_Key index support.\n", 709 current->comm); 710 dev_warn(file->port->dev, 711 " Documentation/infiniband/user_mad.txt has info on the new ABI.\n"); 712 } 713 } 714 715 file->agent[agent_id] = agent; 716 ret = 0; 717 718 out: 719 mutex_unlock(&file->mutex); 720 721 if (ret && agent) 722 ib_unregister_mad_agent(agent); 723 724 mutex_unlock(&file->port->file_mutex); 725 726 return ret; 727 } 728 729 static int ib_umad_reg_agent2(struct ib_umad_file *file, void __user *arg) 730 { 731 struct ib_user_mad_reg_req2 ureq; 732 struct ib_mad_reg_req req; 733 struct ib_mad_agent *agent = NULL; 734 int agent_id; 735 int ret; 736 737 mutex_lock(&file->port->file_mutex); 738 mutex_lock(&file->mutex); 739 740 if (!file->port->ib_dev) { 741 dev_notice(file->port->dev, 742 "ib_umad_reg_agent2: invalid device\n"); 743 ret = -EPIPE; 744 goto out; 745 } 746 747 if (copy_from_user(&ureq, arg, sizeof(ureq))) { 748 ret = -EFAULT; 749 goto out; 750 } 751 752 if (ureq.qpn != 0 && ureq.qpn != 1) { 753 dev_notice(file->port->dev, 754 "ib_umad_reg_agent2: invalid QPN %d specified\n", 755 ureq.qpn); 756 ret = -EINVAL; 757 goto out; 758 } 759 760 if (ureq.flags & ~IB_USER_MAD_REG_FLAGS_CAP) { 761 dev_notice(file->port->dev, 762 "ib_umad_reg_agent2 failed: invalid registration flags specified 0x%x; supported 0x%x\n", 763 ureq.flags, IB_USER_MAD_REG_FLAGS_CAP); 764 ret = -EINVAL; 765 766 if (put_user((u32)IB_USER_MAD_REG_FLAGS_CAP, 767 (u32 __user *) (arg + offsetof(struct 768 ib_user_mad_reg_req2, flags)))) 769 ret = -EFAULT; 770 771 goto out; 772 } 773 774 for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) 775 if (!__get_agent(file, agent_id)) 776 goto found; 777 778 dev_notice(file->port->dev, 779 "ib_umad_reg_agent2: Max Agents (%u) reached\n", 780 IB_UMAD_MAX_AGENTS); 781 ret = -ENOMEM; 782 goto out; 783 784 found: 785 if (ureq.mgmt_class) { 786 memset(&req, 0, sizeof(req)); 787 req.mgmt_class = ureq.mgmt_class; 788 req.mgmt_class_version = ureq.mgmt_class_version; 789 if (ureq.oui & 0xff000000) { 790 dev_notice(file->port->dev, 791 "ib_umad_reg_agent2 failed: oui invalid 0x%08x\n", 792 ureq.oui); 793 ret = -EINVAL; 794 goto out; 795 } 796 req.oui[2] = ureq.oui & 0x0000ff; 797 req.oui[1] = (ureq.oui & 0x00ff00) >> 8; 798 req.oui[0] = (ureq.oui & 0xff0000) >> 16; 799 memcpy(req.method_mask, ureq.method_mask, 800 sizeof(req.method_mask)); 801 } 802 803 agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, 804 ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, 805 ureq.mgmt_class ? &req : NULL, 806 ureq.rmpp_version, 807 send_handler, recv_handler, file, 808 ureq.flags); 809 if (IS_ERR(agent)) { 810 ret = PTR_ERR(agent); 811 agent = NULL; 812 goto out; 813 } 814 815 if (put_user(agent_id, 816 (u32 __user *)(arg + 817 offsetof(struct ib_user_mad_reg_req2, id)))) { 818 ret = -EFAULT; 819 goto out; 820 } 821 822 if (!file->already_used) { 823 file->already_used = 1; 824 file->use_pkey_index = 1; 825 } 826 827 file->agent[agent_id] = agent; 828 ret = 0; 829 830 out: 831 mutex_unlock(&file->mutex); 832 833 if (ret && agent) 834 ib_unregister_mad_agent(agent); 835 836 mutex_unlock(&file->port->file_mutex); 837 838 return ret; 839 } 840 841 842 static int ib_umad_unreg_agent(struct ib_umad_file *file, u32 __user *arg) 843 { 844 struct ib_mad_agent *agent = NULL; 845 u32 id; 846 int ret = 0; 847 848 if (get_user(id, arg)) 849 return -EFAULT; 850 851 mutex_lock(&file->port->file_mutex); 852 mutex_lock(&file->mutex); 853 854 if (id >= IB_UMAD_MAX_AGENTS || !__get_agent(file, id)) { 855 ret = -EINVAL; 856 goto out; 857 } 858 859 agent = file->agent[id]; 860 file->agent[id] = NULL; 861 862 out: 863 mutex_unlock(&file->mutex); 864 865 if (agent) 866 ib_unregister_mad_agent(agent); 867 868 mutex_unlock(&file->port->file_mutex); 869 870 return ret; 871 } 872 873 static long ib_umad_enable_pkey(struct ib_umad_file *file) 874 { 875 int ret = 0; 876 877 mutex_lock(&file->mutex); 878 if (file->already_used) 879 ret = -EINVAL; 880 else 881 file->use_pkey_index = 1; 882 mutex_unlock(&file->mutex); 883 884 return ret; 885 } 886 887 static long ib_umad_ioctl(struct file *filp, unsigned int cmd, 888 unsigned long arg) 889 { 890 switch (cmd) { 891 case IB_USER_MAD_REGISTER_AGENT: 892 return ib_umad_reg_agent(filp->private_data, (void __user *) arg, 0); 893 case IB_USER_MAD_UNREGISTER_AGENT: 894 return ib_umad_unreg_agent(filp->private_data, (__u32 __user *) arg); 895 case IB_USER_MAD_ENABLE_PKEY: 896 return ib_umad_enable_pkey(filp->private_data); 897 case IB_USER_MAD_REGISTER_AGENT2: 898 return ib_umad_reg_agent2(filp->private_data, (void __user *) arg); 899 default: 900 return -ENOIOCTLCMD; 901 } 902 } 903 904 #ifdef CONFIG_COMPAT 905 static long ib_umad_compat_ioctl(struct file *filp, unsigned int cmd, 906 unsigned long arg) 907 { 908 switch (cmd) { 909 case IB_USER_MAD_REGISTER_AGENT: 910 return ib_umad_reg_agent(filp->private_data, compat_ptr(arg), 1); 911 case IB_USER_MAD_UNREGISTER_AGENT: 912 return ib_umad_unreg_agent(filp->private_data, compat_ptr(arg)); 913 case IB_USER_MAD_ENABLE_PKEY: 914 return ib_umad_enable_pkey(filp->private_data); 915 case IB_USER_MAD_REGISTER_AGENT2: 916 return ib_umad_reg_agent2(filp->private_data, compat_ptr(arg)); 917 default: 918 return -ENOIOCTLCMD; 919 } 920 } 921 #endif 922 923 /* 924 * ib_umad_open() does not need the BKL: 925 * 926 * - the ib_umad_port structures are properly reference counted, and 927 * everything else is purely local to the file being created, so 928 * races against other open calls are not a problem; 929 * - the ioctl method does not affect any global state outside of the 930 * file structure being operated on; 931 */ 932 static int ib_umad_open(struct inode *inode, struct file *filp) 933 { 934 struct ib_umad_port *port; 935 struct ib_umad_file *file; 936 int ret = -ENXIO; 937 938 port = container_of(inode->i_cdev, struct ib_umad_port, cdev); 939 940 mutex_lock(&port->file_mutex); 941 942 if (!port->ib_dev) 943 goto out; 944 945 ret = -ENOMEM; 946 file = kzalloc(sizeof *file, GFP_KERNEL); 947 if (!file) 948 goto out; 949 950 mutex_init(&file->mutex); 951 spin_lock_init(&file->send_lock); 952 INIT_LIST_HEAD(&file->recv_list); 953 INIT_LIST_HEAD(&file->send_list); 954 init_waitqueue_head(&file->recv_wait); 955 956 file->port = port; 957 filp->private_data = file; 958 959 list_add_tail(&file->port_list, &port->file_list); 960 961 ret = nonseekable_open(inode, filp); 962 if (ret) { 963 list_del(&file->port_list); 964 kfree(file); 965 goto out; 966 } 967 968 kobject_get(&port->umad_dev->kobj); 969 970 out: 971 mutex_unlock(&port->file_mutex); 972 return ret; 973 } 974 975 static int ib_umad_close(struct inode *inode, struct file *filp) 976 { 977 struct ib_umad_file *file = filp->private_data; 978 struct ib_umad_device *dev = file->port->umad_dev; 979 struct ib_umad_packet *packet, *tmp; 980 int already_dead; 981 int i; 982 983 mutex_lock(&file->port->file_mutex); 984 mutex_lock(&file->mutex); 985 986 already_dead = file->agents_dead; 987 file->agents_dead = 1; 988 989 list_for_each_entry_safe(packet, tmp, &file->recv_list, list) { 990 if (packet->recv_wc) 991 ib_free_recv_mad(packet->recv_wc); 992 kfree(packet); 993 } 994 995 list_del(&file->port_list); 996 997 mutex_unlock(&file->mutex); 998 999 if (!already_dead) 1000 for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i) 1001 if (file->agent[i]) 1002 ib_unregister_mad_agent(file->agent[i]); 1003 1004 mutex_unlock(&file->port->file_mutex); 1005 1006 kfree(file); 1007 kobject_put(&dev->kobj); 1008 1009 return 0; 1010 } 1011 1012 static const struct file_operations umad_fops = { 1013 .owner = THIS_MODULE, 1014 .read = ib_umad_read, 1015 .write = ib_umad_write, 1016 .poll = ib_umad_poll, 1017 .unlocked_ioctl = ib_umad_ioctl, 1018 #ifdef CONFIG_COMPAT 1019 .compat_ioctl = ib_umad_compat_ioctl, 1020 #endif 1021 .open = ib_umad_open, 1022 .release = ib_umad_close, 1023 .llseek = no_llseek, 1024 }; 1025 1026 static int ib_umad_sm_open(struct inode *inode, struct file *filp) 1027 { 1028 struct ib_umad_port *port; 1029 struct ib_port_modify props = { 1030 .set_port_cap_mask = IB_PORT_SM 1031 }; 1032 int ret; 1033 1034 port = container_of(inode->i_cdev, struct ib_umad_port, sm_cdev); 1035 1036 if (filp->f_flags & O_NONBLOCK) { 1037 if (down_trylock(&port->sm_sem)) { 1038 ret = -EAGAIN; 1039 goto fail; 1040 } 1041 } else { 1042 if (down_interruptible(&port->sm_sem)) { 1043 ret = -ERESTARTSYS; 1044 goto fail; 1045 } 1046 } 1047 1048 ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); 1049 if (ret) 1050 goto err_up_sem; 1051 1052 filp->private_data = port; 1053 1054 ret = nonseekable_open(inode, filp); 1055 if (ret) 1056 goto err_clr_sm_cap; 1057 1058 kobject_get(&port->umad_dev->kobj); 1059 1060 return 0; 1061 1062 err_clr_sm_cap: 1063 swap(props.set_port_cap_mask, props.clr_port_cap_mask); 1064 ib_modify_port(port->ib_dev, port->port_num, 0, &props); 1065 1066 err_up_sem: 1067 up(&port->sm_sem); 1068 1069 fail: 1070 return ret; 1071 } 1072 1073 static int ib_umad_sm_close(struct inode *inode, struct file *filp) 1074 { 1075 struct ib_umad_port *port = filp->private_data; 1076 struct ib_port_modify props = { 1077 .clr_port_cap_mask = IB_PORT_SM 1078 }; 1079 int ret = 0; 1080 1081 mutex_lock(&port->file_mutex); 1082 if (port->ib_dev) 1083 ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); 1084 mutex_unlock(&port->file_mutex); 1085 1086 up(&port->sm_sem); 1087 1088 kobject_put(&port->umad_dev->kobj); 1089 1090 return ret; 1091 } 1092 1093 static const struct file_operations umad_sm_fops = { 1094 .owner = THIS_MODULE, 1095 .open = ib_umad_sm_open, 1096 .release = ib_umad_sm_close, 1097 .llseek = no_llseek, 1098 }; 1099 1100 static struct ib_client umad_client = { 1101 .name = "umad", 1102 .add = ib_umad_add_one, 1103 .remove = ib_umad_remove_one 1104 }; 1105 1106 static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, 1107 char *buf) 1108 { 1109 struct ib_umad_port *port = dev_get_drvdata(dev); 1110 1111 if (!port) 1112 return -ENODEV; 1113 1114 return sprintf(buf, "%s\n", port->ib_dev->name); 1115 } 1116 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); 1117 1118 static ssize_t show_port(struct device *dev, struct device_attribute *attr, 1119 char *buf) 1120 { 1121 struct ib_umad_port *port = dev_get_drvdata(dev); 1122 1123 if (!port) 1124 return -ENODEV; 1125 1126 return sprintf(buf, "%d\n", port->port_num); 1127 } 1128 static DEVICE_ATTR(port, S_IRUGO, show_port, NULL); 1129 1130 static CLASS_ATTR_STRING(abi_version, S_IRUGO, 1131 __stringify(IB_USER_MAD_ABI_VERSION)); 1132 1133 static dev_t overflow_maj; 1134 static DECLARE_BITMAP(overflow_map, IB_UMAD_MAX_PORTS); 1135 static int find_overflow_devnum(struct ib_device *device) 1136 { 1137 int ret; 1138 1139 if (!overflow_maj) { 1140 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UMAD_MAX_PORTS * 2, 1141 "infiniband_mad"); 1142 if (ret) { 1143 dev_err(&device->dev, 1144 "couldn't register dynamic device number\n"); 1145 return ret; 1146 } 1147 } 1148 1149 ret = find_first_zero_bit(overflow_map, IB_UMAD_MAX_PORTS); 1150 if (ret >= IB_UMAD_MAX_PORTS) 1151 return -1; 1152 1153 return ret; 1154 } 1155 1156 static int ib_umad_init_port(struct ib_device *device, int port_num, 1157 struct ib_umad_device *umad_dev, 1158 struct ib_umad_port *port) 1159 { 1160 int devnum; 1161 dev_t base; 1162 1163 spin_lock(&port_lock); 1164 devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS); 1165 if (devnum >= IB_UMAD_MAX_PORTS) { 1166 spin_unlock(&port_lock); 1167 devnum = find_overflow_devnum(device); 1168 if (devnum < 0) 1169 return -1; 1170 1171 spin_lock(&port_lock); 1172 port->dev_num = devnum + IB_UMAD_MAX_PORTS; 1173 base = devnum + overflow_maj; 1174 set_bit(devnum, overflow_map); 1175 } else { 1176 port->dev_num = devnum; 1177 base = devnum + base_dev; 1178 set_bit(devnum, dev_map); 1179 } 1180 spin_unlock(&port_lock); 1181 1182 port->ib_dev = device; 1183 port->port_num = port_num; 1184 sema_init(&port->sm_sem, 1); 1185 mutex_init(&port->file_mutex); 1186 INIT_LIST_HEAD(&port->file_list); 1187 1188 cdev_init(&port->cdev, &umad_fops); 1189 port->cdev.owner = THIS_MODULE; 1190 cdev_set_parent(&port->cdev, &umad_dev->kobj); 1191 kobject_set_name(&port->cdev.kobj, "umad%d", port->dev_num); 1192 if (cdev_add(&port->cdev, base, 1)) 1193 goto err_cdev; 1194 1195 port->dev = device_create(umad_class, device->dev.parent, 1196 port->cdev.dev, port, 1197 "umad%d", port->dev_num); 1198 if (IS_ERR(port->dev)) 1199 goto err_cdev; 1200 1201 if (device_create_file(port->dev, &dev_attr_ibdev)) 1202 goto err_dev; 1203 if (device_create_file(port->dev, &dev_attr_port)) 1204 goto err_dev; 1205 1206 base += IB_UMAD_MAX_PORTS; 1207 cdev_init(&port->sm_cdev, &umad_sm_fops); 1208 port->sm_cdev.owner = THIS_MODULE; 1209 cdev_set_parent(&port->sm_cdev, &umad_dev->kobj); 1210 kobject_set_name(&port->sm_cdev.kobj, "issm%d", port->dev_num); 1211 if (cdev_add(&port->sm_cdev, base, 1)) 1212 goto err_sm_cdev; 1213 1214 port->sm_dev = device_create(umad_class, device->dev.parent, 1215 port->sm_cdev.dev, port, 1216 "issm%d", port->dev_num); 1217 if (IS_ERR(port->sm_dev)) 1218 goto err_sm_cdev; 1219 1220 if (device_create_file(port->sm_dev, &dev_attr_ibdev)) 1221 goto err_sm_dev; 1222 if (device_create_file(port->sm_dev, &dev_attr_port)) 1223 goto err_sm_dev; 1224 1225 return 0; 1226 1227 err_sm_dev: 1228 device_destroy(umad_class, port->sm_cdev.dev); 1229 1230 err_sm_cdev: 1231 cdev_del(&port->sm_cdev); 1232 1233 err_dev: 1234 device_destroy(umad_class, port->cdev.dev); 1235 1236 err_cdev: 1237 cdev_del(&port->cdev); 1238 if (port->dev_num < IB_UMAD_MAX_PORTS) 1239 clear_bit(devnum, dev_map); 1240 else 1241 clear_bit(devnum, overflow_map); 1242 1243 return -1; 1244 } 1245 1246 static void ib_umad_kill_port(struct ib_umad_port *port) 1247 { 1248 struct ib_umad_file *file; 1249 int id; 1250 1251 dev_set_drvdata(port->dev, NULL); 1252 dev_set_drvdata(port->sm_dev, NULL); 1253 1254 device_destroy(umad_class, port->cdev.dev); 1255 device_destroy(umad_class, port->sm_cdev.dev); 1256 1257 cdev_del(&port->cdev); 1258 cdev_del(&port->sm_cdev); 1259 1260 mutex_lock(&port->file_mutex); 1261 1262 port->ib_dev = NULL; 1263 1264 list_for_each_entry(file, &port->file_list, port_list) { 1265 mutex_lock(&file->mutex); 1266 file->agents_dead = 1; 1267 mutex_unlock(&file->mutex); 1268 1269 for (id = 0; id < IB_UMAD_MAX_AGENTS; ++id) 1270 if (file->agent[id]) 1271 ib_unregister_mad_agent(file->agent[id]); 1272 } 1273 1274 mutex_unlock(&port->file_mutex); 1275 1276 if (port->dev_num < IB_UMAD_MAX_PORTS) 1277 clear_bit(port->dev_num, dev_map); 1278 else 1279 clear_bit(port->dev_num - IB_UMAD_MAX_PORTS, overflow_map); 1280 } 1281 1282 static void ib_umad_add_one(struct ib_device *device) 1283 { 1284 struct ib_umad_device *umad_dev; 1285 int s, e, i; 1286 int count = 0; 1287 1288 s = rdma_start_port(device); 1289 e = rdma_end_port(device); 1290 1291 umad_dev = kzalloc(sizeof *umad_dev + 1292 (e - s + 1) * sizeof (struct ib_umad_port), 1293 GFP_KERNEL); 1294 if (!umad_dev) 1295 return; 1296 1297 kobject_init(&umad_dev->kobj, &ib_umad_dev_ktype); 1298 1299 for (i = s; i <= e; ++i) { 1300 if (!rdma_cap_ib_mad(device, i)) 1301 continue; 1302 1303 umad_dev->port[i - s].umad_dev = umad_dev; 1304 1305 if (ib_umad_init_port(device, i, umad_dev, 1306 &umad_dev->port[i - s])) 1307 goto err; 1308 1309 count++; 1310 } 1311 1312 if (!count) 1313 goto free; 1314 1315 ib_set_client_data(device, &umad_client, umad_dev); 1316 1317 return; 1318 1319 err: 1320 while (--i >= s) { 1321 if (!rdma_cap_ib_mad(device, i)) 1322 continue; 1323 1324 ib_umad_kill_port(&umad_dev->port[i - s]); 1325 } 1326 free: 1327 kobject_put(&umad_dev->kobj); 1328 } 1329 1330 static void ib_umad_remove_one(struct ib_device *device, void *client_data) 1331 { 1332 struct ib_umad_device *umad_dev = client_data; 1333 int i; 1334 1335 if (!umad_dev) 1336 return; 1337 1338 for (i = 0; i <= rdma_end_port(device) - rdma_start_port(device); ++i) { 1339 if (rdma_cap_ib_mad(device, i + rdma_start_port(device))) 1340 ib_umad_kill_port(&umad_dev->port[i]); 1341 } 1342 1343 kobject_put(&umad_dev->kobj); 1344 } 1345 1346 static char *umad_devnode(struct device *dev, umode_t *mode) 1347 { 1348 return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); 1349 } 1350 1351 static int __init ib_umad_init(void) 1352 { 1353 int ret; 1354 1355 ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2, 1356 "infiniband_mad"); 1357 if (ret) { 1358 pr_err("couldn't register device number\n"); 1359 goto out; 1360 } 1361 1362 umad_class = class_create(THIS_MODULE, "infiniband_mad"); 1363 if (IS_ERR(umad_class)) { 1364 ret = PTR_ERR(umad_class); 1365 pr_err("couldn't create class infiniband_mad\n"); 1366 goto out_chrdev; 1367 } 1368 1369 umad_class->devnode = umad_devnode; 1370 1371 ret = class_create_file(umad_class, &class_attr_abi_version.attr); 1372 if (ret) { 1373 pr_err("couldn't create abi_version attribute\n"); 1374 goto out_class; 1375 } 1376 1377 ret = ib_register_client(&umad_client); 1378 if (ret) { 1379 pr_err("couldn't register ib_umad client\n"); 1380 goto out_class; 1381 } 1382 1383 return 0; 1384 1385 out_class: 1386 class_destroy(umad_class); 1387 1388 out_chrdev: 1389 unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); 1390 1391 out: 1392 return ret; 1393 } 1394 1395 static void __exit ib_umad_cleanup(void) 1396 { 1397 ib_unregister_client(&umad_client); 1398 class_destroy(umad_class); 1399 unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); 1400 if (overflow_maj) 1401 unregister_chrdev_region(overflow_maj, IB_UMAD_MAX_PORTS * 2); 1402 } 1403 1404 module_init(ib_umad_init); 1405 module_exit(ib_umad_cleanup); 1406