1/* 2 * Copyright (c) 2005 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved. 4 * Copyright (c) 2005 PathScale, Inc. All rights reserved. 5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 * 35 * $Id: uverbs_cmd.c,v 1.1.1.1 2007/10/11 23:31:50 Exp $ 36 */ 37 38#include <linux/file.h> 39#include <linux/fs.h> 40 41#include <asm/uaccess.h> 42 43#include "uverbs.h" 44 45static struct lock_class_key pd_lock_key; 46static struct lock_class_key mr_lock_key; 47static struct lock_class_key cq_lock_key; 48static struct lock_class_key qp_lock_key; 49static struct lock_class_key ah_lock_key; 50static struct lock_class_key srq_lock_key; 51 52#define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \ 53 do { \ 54 (udata)->inbuf = (void __user *) (ibuf); \ 55 (udata)->outbuf = (void __user *) (obuf); \ 56 (udata)->inlen = (ilen); \ 57 (udata)->outlen = (olen); \ 58 } while (0) 59 60/* 61 * The ib_uobject locking scheme is as follows: 62 * 63 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it 64 * needs to be held during all idr operations. When an object is 65 * looked up, a reference must be taken on the object's kref before 66 * dropping this lock. 67 * 68 * - Each object also has an rwsem. This rwsem must be held for 69 * reading while an operation that uses the object is performed. 70 * For example, while registering an MR, the associated PD's 71 * uobject.mutex must be held for reading. The rwsem must be held 72 * for writing while initializing or destroying an object. 73 * 74 * - In addition, each object has a "live" flag. If this flag is not 75 * set, then lookups of the object will fail even if it is found in 76 * the idr. This handles a reader that blocks and does not acquire 77 * the rwsem until after the object is destroyed. The destroy 78 * operation will set the live flag to 0 and then drop the rwsem; 79 * this will allow the reader to acquire the rwsem, see that the 80 * live flag is 0, and then drop the rwsem and its reference to 81 * object. The underlying storage will not be freed until the last 82 * reference to the object is dropped. 83 */ 84 85static void init_uobj(struct ib_uobject *uobj, u64 user_handle, 86 struct ib_ucontext *context, struct lock_class_key *key) 87{ 88 uobj->user_handle = user_handle; 89 uobj->context = context; 90 kref_init(&uobj->ref); 91 init_rwsem(&uobj->mutex); 92 lockdep_set_class(&uobj->mutex, key); 93 uobj->live = 0; 94} 95 96static void release_uobj(struct kref *kref) 97{ 98 kfree(container_of(kref, struct ib_uobject, ref)); 99} 100 101static void put_uobj(struct ib_uobject *uobj) 102{ 103 kref_put(&uobj->ref, release_uobj); 104} 105 106static void put_uobj_read(struct ib_uobject *uobj) 107{ 108 up_read(&uobj->mutex); 109 put_uobj(uobj); 110} 111 112static void put_uobj_write(struct ib_uobject *uobj) 113{ 114 up_write(&uobj->mutex); 115 put_uobj(uobj); 116} 117 118static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj) 119{ 120 int ret; 121 122retry: 123 if (!idr_pre_get(idr, GFP_KERNEL)) 124 return -ENOMEM; 125 126 spin_lock(&ib_uverbs_idr_lock); 127 ret = idr_get_new(idr, uobj, &uobj->id); 128 spin_unlock(&ib_uverbs_idr_lock); 129 130 if (ret == -EAGAIN) 131 goto retry; 132 133 return ret; 134} 135 136void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj) 137{ 138 spin_lock(&ib_uverbs_idr_lock); 139 idr_remove(idr, uobj->id); 140 spin_unlock(&ib_uverbs_idr_lock); 141} 142 143static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id, 144 struct ib_ucontext *context) 145{ 146 struct ib_uobject *uobj; 147 148 spin_lock(&ib_uverbs_idr_lock); 149 uobj = idr_find(idr, id); 150 if (uobj) 151 kref_get(&uobj->ref); 152 spin_unlock(&ib_uverbs_idr_lock); 153 154 return uobj; 155} 156 157static struct ib_uobject *idr_read_uobj(struct idr *idr, int id, 158 struct ib_ucontext *context, int nested) 159{ 160 struct ib_uobject *uobj; 161 162 uobj = __idr_get_uobj(idr, id, context); 163 if (!uobj) 164 return NULL; 165 166 if (nested) 167 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING); 168 else 169 down_read(&uobj->mutex); 170 if (!uobj->live) { 171 put_uobj_read(uobj); 172 return NULL; 173 } 174 175 return uobj; 176} 177 178static struct ib_uobject *idr_write_uobj(struct idr *idr, int id, 179 struct ib_ucontext *context) 180{ 181 struct ib_uobject *uobj; 182 183 uobj = __idr_get_uobj(idr, id, context); 184 if (!uobj) 185 return NULL; 186 187 down_write(&uobj->mutex); 188 if (!uobj->live) { 189 put_uobj_write(uobj); 190 return NULL; 191 } 192 193 return uobj; 194} 195 196static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context, 197 int nested) 198{ 199 struct ib_uobject *uobj; 200 201 uobj = idr_read_uobj(idr, id, context, nested); 202 return uobj ? uobj->object : NULL; 203} 204 205static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context) 206{ 207 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0); 208} 209 210static void put_pd_read(struct ib_pd *pd) 211{ 212 put_uobj_read(pd->uobject); 213} 214 215static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested) 216{ 217 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested); 218} 219 220static void put_cq_read(struct ib_cq *cq) 221{ 222 put_uobj_read(cq->uobject); 223} 224 225static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context) 226{ 227 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0); 228} 229 230static void put_ah_read(struct ib_ah *ah) 231{ 232 put_uobj_read(ah->uobject); 233} 234 235static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context) 236{ 237 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0); 238} 239 240static void put_qp_read(struct ib_qp *qp) 241{ 242 put_uobj_read(qp->uobject); 243} 244 245static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context) 246{ 247 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0); 248} 249 250static void put_srq_read(struct ib_srq *srq) 251{ 252 put_uobj_read(srq->uobject); 253} 254 255ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, 256 const char __user *buf, 257 int in_len, int out_len) 258{ 259 struct ib_uverbs_get_context cmd; 260 struct ib_uverbs_get_context_resp resp; 261 struct ib_udata udata; 262 struct ib_device *ibdev = file->device->ib_dev; 263 struct ib_ucontext *ucontext; 264 struct file *filp; 265 int ret; 266 267 if (out_len < sizeof resp) 268 return -ENOSPC; 269 270 if (copy_from_user(&cmd, buf, sizeof cmd)) 271 return -EFAULT; 272 273 mutex_lock(&file->mutex); 274 275 if (file->ucontext) { 276 ret = -EINVAL; 277 goto err; 278 } 279 280 INIT_UDATA(&udata, buf + sizeof cmd, 281 (unsigned long) cmd.response + sizeof resp, 282 in_len - sizeof cmd, out_len - sizeof resp); 283 284 ucontext = ibdev->alloc_ucontext(ibdev, &udata); 285 if (IS_ERR(ucontext)) { 286 ret = PTR_ERR(file->ucontext); 287 goto err; 288 } 289 290 ucontext->device = ibdev; 291 INIT_LIST_HEAD(&ucontext->pd_list); 292 INIT_LIST_HEAD(&ucontext->mr_list); 293 INIT_LIST_HEAD(&ucontext->mw_list); 294 INIT_LIST_HEAD(&ucontext->cq_list); 295 INIT_LIST_HEAD(&ucontext->qp_list); 296 INIT_LIST_HEAD(&ucontext->srq_list); 297 INIT_LIST_HEAD(&ucontext->ah_list); 298 ucontext->closing = 0; 299 300 resp.num_comp_vectors = file->device->num_comp_vectors; 301 302 filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd); 303 if (IS_ERR(filp)) { 304 ret = PTR_ERR(filp); 305 goto err_free; 306 } 307 308 if (copy_to_user((void __user *) (unsigned long) cmd.response, 309 &resp, sizeof resp)) { 310 ret = -EFAULT; 311 goto err_file; 312 } 313 314 file->async_file = filp->private_data; 315 316 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev, 317 ib_uverbs_event_handler); 318 ret = ib_register_event_handler(&file->event_handler); 319 if (ret) 320 goto err_file; 321 322 kref_get(&file->async_file->ref); 323 kref_get(&file->ref); 324 file->ucontext = ucontext; 325 326 fd_install(resp.async_fd, filp); 327 328 mutex_unlock(&file->mutex); 329 330 return in_len; 331 332err_file: 333 put_unused_fd(resp.async_fd); 334 fput(filp); 335 336err_free: 337 ibdev->dealloc_ucontext(ucontext); 338 339err: 340 mutex_unlock(&file->mutex); 341 return ret; 342} 343 344ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file, 345 const char __user *buf, 346 int in_len, int out_len) 347{ 348 struct ib_uverbs_query_device cmd; 349 struct ib_uverbs_query_device_resp resp; 350 struct ib_device_attr attr; 351 int ret; 352 353 if (out_len < sizeof resp) 354 return -ENOSPC; 355 356 if (copy_from_user(&cmd, buf, sizeof cmd)) 357 return -EFAULT; 358 359 ret = ib_query_device(file->device->ib_dev, &attr); 360 if (ret) 361 return ret; 362 363 memset(&resp, 0, sizeof resp); 364 365 resp.fw_ver = attr.fw_ver; 366 resp.node_guid = file->device->ib_dev->node_guid; 367 resp.sys_image_guid = attr.sys_image_guid; 368 resp.max_mr_size = attr.max_mr_size; 369 resp.page_size_cap = attr.page_size_cap; 370 resp.vendor_id = attr.vendor_id; 371 resp.vendor_part_id = attr.vendor_part_id; 372 resp.hw_ver = attr.hw_ver; 373 resp.max_qp = attr.max_qp; 374 resp.max_qp_wr = attr.max_qp_wr; 375 resp.device_cap_flags = attr.device_cap_flags; 376 resp.max_sge = attr.max_sge; 377 resp.max_sge_rd = attr.max_sge_rd; 378 resp.max_cq = attr.max_cq; 379 resp.max_cqe = attr.max_cqe; 380 resp.max_mr = attr.max_mr; 381 resp.max_pd = attr.max_pd; 382 resp.max_qp_rd_atom = attr.max_qp_rd_atom; 383 resp.max_ee_rd_atom = attr.max_ee_rd_atom; 384 resp.max_res_rd_atom = attr.max_res_rd_atom; 385 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom; 386 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom; 387 resp.atomic_cap = attr.atomic_cap; 388 resp.max_ee = attr.max_ee; 389 resp.max_rdd = attr.max_rdd; 390 resp.max_mw = attr.max_mw; 391 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp; 392 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp; 393 resp.max_mcast_grp = attr.max_mcast_grp; 394 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach; 395 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach; 396 resp.max_ah = attr.max_ah; 397 resp.max_fmr = attr.max_fmr; 398 resp.max_map_per_fmr = attr.max_map_per_fmr; 399 resp.max_srq = attr.max_srq; 400 resp.max_srq_wr = attr.max_srq_wr; 401 resp.max_srq_sge = attr.max_srq_sge; 402 resp.max_pkeys = attr.max_pkeys; 403 resp.local_ca_ack_delay = attr.local_ca_ack_delay; 404 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt; 405 406 if (copy_to_user((void __user *) (unsigned long) cmd.response, 407 &resp, sizeof resp)) 408 return -EFAULT; 409 410 return in_len; 411} 412 413ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file, 414 const char __user *buf, 415 int in_len, int out_len) 416{ 417 struct ib_uverbs_query_port cmd; 418 struct ib_uverbs_query_port_resp resp; 419 struct ib_port_attr attr; 420 int ret; 421 422 if (out_len < sizeof resp) 423 return -ENOSPC; 424 425 if (copy_from_user(&cmd, buf, sizeof cmd)) 426 return -EFAULT; 427 428 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr); 429 if (ret) 430 return ret; 431 432 memset(&resp, 0, sizeof resp); 433 434 resp.state = attr.state; 435 resp.max_mtu = attr.max_mtu; 436 resp.active_mtu = attr.active_mtu; 437 resp.gid_tbl_len = attr.gid_tbl_len; 438 resp.port_cap_flags = attr.port_cap_flags; 439 resp.max_msg_sz = attr.max_msg_sz; 440 resp.bad_pkey_cntr = attr.bad_pkey_cntr; 441 resp.qkey_viol_cntr = attr.qkey_viol_cntr; 442 resp.pkey_tbl_len = attr.pkey_tbl_len; 443 resp.lid = attr.lid; 444 resp.sm_lid = attr.sm_lid; 445 resp.lmc = attr.lmc; 446 resp.max_vl_num = attr.max_vl_num; 447 resp.sm_sl = attr.sm_sl; 448 resp.subnet_timeout = attr.subnet_timeout; 449 resp.init_type_reply = attr.init_type_reply; 450 resp.active_width = attr.active_width; 451 resp.active_speed = attr.active_speed; 452 resp.phys_state = attr.phys_state; 453 454 if (copy_to_user((void __user *) (unsigned long) cmd.response, 455 &resp, sizeof resp)) 456 return -EFAULT; 457 458 return in_len; 459} 460 461ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file, 462 const char __user *buf, 463 int in_len, int out_len) 464{ 465 struct ib_uverbs_alloc_pd cmd; 466 struct ib_uverbs_alloc_pd_resp resp; 467 struct ib_udata udata; 468 struct ib_uobject *uobj; 469 struct ib_pd *pd; 470 int ret; 471 472 if (out_len < sizeof resp) 473 return -ENOSPC; 474 475 if (copy_from_user(&cmd, buf, sizeof cmd)) 476 return -EFAULT; 477 478 INIT_UDATA(&udata, buf + sizeof cmd, 479 (unsigned long) cmd.response + sizeof resp, 480 in_len - sizeof cmd, out_len - sizeof resp); 481 482 uobj = kmalloc(sizeof *uobj, GFP_KERNEL); 483 if (!uobj) 484 return -ENOMEM; 485 486 init_uobj(uobj, 0, file->ucontext, &pd_lock_key); 487 down_write(&uobj->mutex); 488 489 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev, 490 file->ucontext, &udata); 491 if (IS_ERR(pd)) { 492 ret = PTR_ERR(pd); 493 goto err; 494 } 495 496 pd->device = file->device->ib_dev; 497 pd->uobject = uobj; 498 atomic_set(&pd->usecnt, 0); 499 500 uobj->object = pd; 501 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj); 502 if (ret) 503 goto err_idr; 504 505 memset(&resp, 0, sizeof resp); 506 resp.pd_handle = uobj->id; 507 508 if (copy_to_user((void __user *) (unsigned long) cmd.response, 509 &resp, sizeof resp)) { 510 ret = -EFAULT; 511 goto err_copy; 512 } 513 514 mutex_lock(&file->mutex); 515 list_add_tail(&uobj->list, &file->ucontext->pd_list); 516 mutex_unlock(&file->mutex); 517 518 uobj->live = 1; 519 520 up_write(&uobj->mutex); 521 522 return in_len; 523 524err_copy: 525 idr_remove_uobj(&ib_uverbs_pd_idr, uobj); 526 527err_idr: 528 ib_dealloc_pd(pd); 529 530err: 531 put_uobj_write(uobj); 532 return ret; 533} 534 535ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file, 536 const char __user *buf, 537 int in_len, int out_len) 538{ 539 struct ib_uverbs_dealloc_pd cmd; 540 struct ib_uobject *uobj; 541 int ret; 542 543 if (copy_from_user(&cmd, buf, sizeof cmd)) 544 return -EFAULT; 545 546 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext); 547 if (!uobj) 548 return -EINVAL; 549 550 ret = ib_dealloc_pd(uobj->object); 551 if (!ret) 552 uobj->live = 0; 553 554 put_uobj_write(uobj); 555 556 if (ret) 557 return ret; 558 559 idr_remove_uobj(&ib_uverbs_pd_idr, uobj); 560 561 mutex_lock(&file->mutex); 562 list_del(&uobj->list); 563 mutex_unlock(&file->mutex); 564 565 put_uobj(uobj); 566 567 return in_len; 568} 569 570ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, 571 const char __user *buf, int in_len, 572 int out_len) 573{ 574 struct ib_uverbs_reg_mr cmd; 575 struct ib_uverbs_reg_mr_resp resp; 576 struct ib_udata udata; 577 struct ib_uobject *uobj; 578 struct ib_pd *pd; 579 struct ib_mr *mr; 580 int ret; 581 582 if (out_len < sizeof resp) 583 return -ENOSPC; 584 585 if (copy_from_user(&cmd, buf, sizeof cmd)) 586 return -EFAULT; 587 588 INIT_UDATA(&udata, buf + sizeof cmd, 589 (unsigned long) cmd.response + sizeof resp, 590 in_len - sizeof cmd, out_len - sizeof resp); 591 592 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 593 return -EINVAL; 594 595 /* 596 * Local write permission is required if remote write or 597 * remote atomic permission is also requested. 598 */ 599 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) && 600 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE)) 601 return -EINVAL; 602 603 uobj = kmalloc(sizeof *uobj, GFP_KERNEL); 604 if (!uobj) 605 return -ENOMEM; 606 607 init_uobj(uobj, 0, file->ucontext, &mr_lock_key); 608 down_write(&uobj->mutex); 609 610 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 611 if (!pd) { 612 ret = -EINVAL; 613 goto err_free; 614 } 615 616 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 617 cmd.access_flags, &udata); 618 if (IS_ERR(mr)) { 619 ret = PTR_ERR(mr); 620 goto err_put; 621 } 622 623 mr->device = pd->device; 624 mr->pd = pd; 625 mr->uobject = uobj; 626 atomic_inc(&pd->usecnt); 627 atomic_set(&mr->usecnt, 0); 628 629 uobj->object = mr; 630 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj); 631 if (ret) 632 goto err_unreg; 633 634 memset(&resp, 0, sizeof resp); 635 resp.lkey = mr->lkey; 636 resp.rkey = mr->rkey; 637 resp.mr_handle = uobj->id; 638 639 if (copy_to_user((void __user *) (unsigned long) cmd.response, 640 &resp, sizeof resp)) { 641 ret = -EFAULT; 642 goto err_copy; 643 } 644 645 put_pd_read(pd); 646 647 mutex_lock(&file->mutex); 648 list_add_tail(&uobj->list, &file->ucontext->mr_list); 649 mutex_unlock(&file->mutex); 650 651 uobj->live = 1; 652 653 up_write(&uobj->mutex); 654 655 return in_len; 656 657err_copy: 658 idr_remove_uobj(&ib_uverbs_mr_idr, uobj); 659 660err_unreg: 661 ib_dereg_mr(mr); 662 663err_put: 664 put_pd_read(pd); 665 666err_free: 667 put_uobj_write(uobj); 668 return ret; 669} 670 671ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file, 672 const char __user *buf, int in_len, 673 int out_len) 674{ 675 struct ib_uverbs_dereg_mr cmd; 676 struct ib_mr *mr; 677 struct ib_uobject *uobj; 678 int ret = -EINVAL; 679 680 if (copy_from_user(&cmd, buf, sizeof cmd)) 681 return -EFAULT; 682 683 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext); 684 if (!uobj) 685 return -EINVAL; 686 687 mr = uobj->object; 688 689 ret = ib_dereg_mr(mr); 690 if (!ret) 691 uobj->live = 0; 692 693 put_uobj_write(uobj); 694 695 if (ret) 696 return ret; 697 698 idr_remove_uobj(&ib_uverbs_mr_idr, uobj); 699 700 mutex_lock(&file->mutex); 701 list_del(&uobj->list); 702 mutex_unlock(&file->mutex); 703 704 put_uobj(uobj); 705 706 return in_len; 707} 708 709ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file, 710 const char __user *buf, int in_len, 711 int out_len) 712{ 713 struct ib_uverbs_create_comp_channel cmd; 714 struct ib_uverbs_create_comp_channel_resp resp; 715 struct file *filp; 716 717 if (out_len < sizeof resp) 718 return -ENOSPC; 719 720 if (copy_from_user(&cmd, buf, sizeof cmd)) 721 return -EFAULT; 722 723 filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd); 724 if (IS_ERR(filp)) 725 return PTR_ERR(filp); 726 727 if (copy_to_user((void __user *) (unsigned long) cmd.response, 728 &resp, sizeof resp)) { 729 put_unused_fd(resp.fd); 730 fput(filp); 731 return -EFAULT; 732 } 733 734 fd_install(resp.fd, filp); 735 return in_len; 736} 737 738ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, 739 const char __user *buf, int in_len, 740 int out_len) 741{ 742 struct ib_uverbs_create_cq cmd; 743 struct ib_uverbs_create_cq_resp resp; 744 struct ib_udata udata; 745 struct ib_ucq_object *obj; 746 struct ib_uverbs_event_file *ev_file = NULL; 747 struct ib_cq *cq; 748 int ret; 749 750 if (out_len < sizeof resp) 751 return -ENOSPC; 752 753 if (copy_from_user(&cmd, buf, sizeof cmd)) 754 return -EFAULT; 755 756 INIT_UDATA(&udata, buf + sizeof cmd, 757 (unsigned long) cmd.response + sizeof resp, 758 in_len - sizeof cmd, out_len - sizeof resp); 759 760 if (cmd.comp_vector >= file->device->num_comp_vectors) 761 return -EINVAL; 762 763 obj = kmalloc(sizeof *obj, GFP_KERNEL); 764 if (!obj) 765 return -ENOMEM; 766 767 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key); 768 down_write(&obj->uobject.mutex); 769 770 if (cmd.comp_channel >= 0) { 771 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel); 772 if (!ev_file) { 773 ret = -EINVAL; 774 goto err; 775 } 776 } 777 778 obj->uverbs_file = file; 779 obj->comp_events_reported = 0; 780 obj->async_events_reported = 0; 781 INIT_LIST_HEAD(&obj->comp_list); 782 INIT_LIST_HEAD(&obj->async_list); 783 784 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe, 785 cmd.comp_vector, 786 file->ucontext, &udata); 787 if (IS_ERR(cq)) { 788 ret = PTR_ERR(cq); 789 goto err_file; 790 } 791 792 cq->device = file->device->ib_dev; 793 cq->uobject = &obj->uobject; 794 cq->comp_handler = ib_uverbs_comp_handler; 795 cq->event_handler = ib_uverbs_cq_event_handler; 796 cq->cq_context = ev_file; 797 atomic_set(&cq->usecnt, 0); 798 799 obj->uobject.object = cq; 800 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject); 801 if (ret) 802 goto err_free; 803 804 memset(&resp, 0, sizeof resp); 805 resp.cq_handle = obj->uobject.id; 806 resp.cqe = cq->cqe; 807 808 if (copy_to_user((void __user *) (unsigned long) cmd.response, 809 &resp, sizeof resp)) { 810 ret = -EFAULT; 811 goto err_copy; 812 } 813 814 mutex_lock(&file->mutex); 815 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list); 816 mutex_unlock(&file->mutex); 817 818 obj->uobject.live = 1; 819 820 up_write(&obj->uobject.mutex); 821 822 return in_len; 823 824err_copy: 825 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject); 826 827err_free: 828 ib_destroy_cq(cq); 829 830err_file: 831 if (ev_file) 832 ib_uverbs_release_ucq(file, ev_file, obj); 833 834err: 835 put_uobj_write(&obj->uobject); 836 return ret; 837} 838 839ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file, 840 const char __user *buf, int in_len, 841 int out_len) 842{ 843 struct ib_uverbs_resize_cq cmd; 844 struct ib_uverbs_resize_cq_resp resp; 845 struct ib_udata udata; 846 struct ib_cq *cq; 847 int ret = -EINVAL; 848 849 if (copy_from_user(&cmd, buf, sizeof cmd)) 850 return -EFAULT; 851 852 INIT_UDATA(&udata, buf + sizeof cmd, 853 (unsigned long) cmd.response + sizeof resp, 854 in_len - sizeof cmd, out_len - sizeof resp); 855 856 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); 857 if (!cq) 858 return -EINVAL; 859 860 ret = cq->device->resize_cq(cq, cmd.cqe, &udata); 861 if (ret) 862 goto out; 863 864 resp.cqe = cq->cqe; 865 866 if (copy_to_user((void __user *) (unsigned long) cmd.response, 867 &resp, sizeof resp.cqe)) 868 ret = -EFAULT; 869 870out: 871 put_cq_read(cq); 872 873 return ret ? ret : in_len; 874} 875 876ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file, 877 const char __user *buf, int in_len, 878 int out_len) 879{ 880 struct ib_uverbs_poll_cq cmd; 881 struct ib_uverbs_poll_cq_resp *resp; 882 struct ib_cq *cq; 883 struct ib_wc *wc; 884 int ret = 0; 885 int i; 886 int rsize; 887 888 if (copy_from_user(&cmd, buf, sizeof cmd)) 889 return -EFAULT; 890 891 wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL); 892 if (!wc) 893 return -ENOMEM; 894 895 rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc); 896 resp = kmalloc(rsize, GFP_KERNEL); 897 if (!resp) { 898 ret = -ENOMEM; 899 goto out_wc; 900 } 901 902 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); 903 if (!cq) { 904 ret = -EINVAL; 905 goto out; 906 } 907 908 resp->count = ib_poll_cq(cq, cmd.ne, wc); 909 910 put_cq_read(cq); 911 912 for (i = 0; i < resp->count; i++) { 913 resp->wc[i].wr_id = wc[i].wr_id; 914 resp->wc[i].status = wc[i].status; 915 resp->wc[i].opcode = wc[i].opcode; 916 resp->wc[i].vendor_err = wc[i].vendor_err; 917 resp->wc[i].byte_len = wc[i].byte_len; 918 resp->wc[i].imm_data = (__u32 __force) wc[i].imm_data; 919 resp->wc[i].qp_num = wc[i].qp->qp_num; 920 resp->wc[i].src_qp = wc[i].src_qp; 921 resp->wc[i].wc_flags = wc[i].wc_flags; 922 resp->wc[i].pkey_index = wc[i].pkey_index; 923 resp->wc[i].slid = wc[i].slid; 924 resp->wc[i].sl = wc[i].sl; 925 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits; 926 resp->wc[i].port_num = wc[i].port_num; 927 } 928 929 if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize)) 930 ret = -EFAULT; 931 932out: 933 kfree(resp); 934 935out_wc: 936 kfree(wc); 937 return ret ? ret : in_len; 938} 939 940ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file, 941 const char __user *buf, int in_len, 942 int out_len) 943{ 944 struct ib_uverbs_req_notify_cq cmd; 945 struct ib_cq *cq; 946 947 if (copy_from_user(&cmd, buf, sizeof cmd)) 948 return -EFAULT; 949 950 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); 951 if (!cq) 952 return -EINVAL; 953 954 ib_req_notify_cq(cq, cmd.solicited_only ? 955 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 956 957 put_cq_read(cq); 958 959 return in_len; 960} 961 962ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file, 963 const char __user *buf, int in_len, 964 int out_len) 965{ 966 struct ib_uverbs_destroy_cq cmd; 967 struct ib_uverbs_destroy_cq_resp resp; 968 struct ib_uobject *uobj; 969 struct ib_cq *cq; 970 struct ib_ucq_object *obj; 971 struct ib_uverbs_event_file *ev_file; 972 int ret = -EINVAL; 973 974 if (copy_from_user(&cmd, buf, sizeof cmd)) 975 return -EFAULT; 976 977 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext); 978 if (!uobj) 979 return -EINVAL; 980 cq = uobj->object; 981 ev_file = cq->cq_context; 982 obj = container_of(cq->uobject, struct ib_ucq_object, uobject); 983 984 ret = ib_destroy_cq(cq); 985 if (!ret) 986 uobj->live = 0; 987 988 put_uobj_write(uobj); 989 990 if (ret) 991 return ret; 992 993 idr_remove_uobj(&ib_uverbs_cq_idr, uobj); 994 995 mutex_lock(&file->mutex); 996 list_del(&uobj->list); 997 mutex_unlock(&file->mutex); 998 999 ib_uverbs_release_ucq(file, ev_file, obj); 1000 1001 memset(&resp, 0, sizeof resp); 1002 resp.comp_events_reported = obj->comp_events_reported; 1003 resp.async_events_reported = obj->async_events_reported; 1004 1005 put_uobj(uobj); 1006 1007 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1008 &resp, sizeof resp)) 1009 return -EFAULT; 1010 1011 return in_len; 1012} 1013 1014ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file, 1015 const char __user *buf, int in_len, 1016 int out_len) 1017{ 1018 struct ib_uverbs_create_qp cmd; 1019 struct ib_uverbs_create_qp_resp resp; 1020 struct ib_udata udata; 1021 struct ib_uqp_object *obj; 1022 struct ib_pd *pd; 1023 struct ib_cq *scq, *rcq; 1024 struct ib_srq *srq; 1025 struct ib_qp *qp; 1026 struct ib_qp_init_attr attr; 1027 int ret; 1028 1029 if (out_len < sizeof resp) 1030 return -ENOSPC; 1031 1032 if (copy_from_user(&cmd, buf, sizeof cmd)) 1033 return -EFAULT; 1034 1035 INIT_UDATA(&udata, buf + sizeof cmd, 1036 (unsigned long) cmd.response + sizeof resp, 1037 in_len - sizeof cmd, out_len - sizeof resp); 1038 1039 obj = kmalloc(sizeof *obj, GFP_KERNEL); 1040 if (!obj) 1041 return -ENOMEM; 1042 1043 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key); 1044 down_write(&obj->uevent.uobject.mutex); 1045 1046 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL; 1047 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 1048 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0); 1049 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ? 1050 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1); 1051 1052 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) { 1053 ret = -EINVAL; 1054 goto err_put; 1055 } 1056 1057 attr.event_handler = ib_uverbs_qp_event_handler; 1058 attr.qp_context = file; 1059 attr.send_cq = scq; 1060 attr.recv_cq = rcq; 1061 attr.srq = srq; 1062 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR; 1063 attr.qp_type = cmd.qp_type; 1064 1065 attr.cap.max_send_wr = cmd.max_send_wr; 1066 attr.cap.max_recv_wr = cmd.max_recv_wr; 1067 attr.cap.max_send_sge = cmd.max_send_sge; 1068 attr.cap.max_recv_sge = cmd.max_recv_sge; 1069 attr.cap.max_inline_data = cmd.max_inline_data; 1070 1071 obj->uevent.events_reported = 0; 1072 INIT_LIST_HEAD(&obj->uevent.event_list); 1073 INIT_LIST_HEAD(&obj->mcast_list); 1074 1075 qp = pd->device->create_qp(pd, &attr, &udata); 1076 if (IS_ERR(qp)) { 1077 ret = PTR_ERR(qp); 1078 goto err_put; 1079 } 1080 1081 qp->device = pd->device; 1082 qp->pd = pd; 1083 qp->send_cq = attr.send_cq; 1084 qp->recv_cq = attr.recv_cq; 1085 qp->srq = attr.srq; 1086 qp->uobject = &obj->uevent.uobject; 1087 qp->event_handler = attr.event_handler; 1088 qp->qp_context = attr.qp_context; 1089 qp->qp_type = attr.qp_type; 1090 atomic_inc(&pd->usecnt); 1091 atomic_inc(&attr.send_cq->usecnt); 1092 atomic_inc(&attr.recv_cq->usecnt); 1093 if (attr.srq) 1094 atomic_inc(&attr.srq->usecnt); 1095 1096 obj->uevent.uobject.object = qp; 1097 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); 1098 if (ret) 1099 goto err_destroy; 1100 1101 memset(&resp, 0, sizeof resp); 1102 resp.qpn = qp->qp_num; 1103 resp.qp_handle = obj->uevent.uobject.id; 1104 resp.max_recv_sge = attr.cap.max_recv_sge; 1105 resp.max_send_sge = attr.cap.max_send_sge; 1106 resp.max_recv_wr = attr.cap.max_recv_wr; 1107 resp.max_send_wr = attr.cap.max_send_wr; 1108 resp.max_inline_data = attr.cap.max_inline_data; 1109 1110 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1111 &resp, sizeof resp)) { 1112 ret = -EFAULT; 1113 goto err_copy; 1114 } 1115 1116 put_pd_read(pd); 1117 put_cq_read(scq); 1118 if (rcq != scq) 1119 put_cq_read(rcq); 1120 if (srq) 1121 put_srq_read(srq); 1122 1123 mutex_lock(&file->mutex); 1124 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); 1125 mutex_unlock(&file->mutex); 1126 1127 obj->uevent.uobject.live = 1; 1128 1129 up_write(&obj->uevent.uobject.mutex); 1130 1131 return in_len; 1132 1133err_copy: 1134 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); 1135 1136err_destroy: 1137 ib_destroy_qp(qp); 1138 1139err_put: 1140 if (pd) 1141 put_pd_read(pd); 1142 if (scq) 1143 put_cq_read(scq); 1144 if (rcq && rcq != scq) 1145 put_cq_read(rcq); 1146 if (srq) 1147 put_srq_read(srq); 1148 1149 put_uobj_write(&obj->uevent.uobject); 1150 return ret; 1151} 1152 1153ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file, 1154 const char __user *buf, int in_len, 1155 int out_len) 1156{ 1157 struct ib_uverbs_query_qp cmd; 1158 struct ib_uverbs_query_qp_resp resp; 1159 struct ib_qp *qp; 1160 struct ib_qp_attr *attr; 1161 struct ib_qp_init_attr *init_attr; 1162 int ret; 1163 1164 if (copy_from_user(&cmd, buf, sizeof cmd)) 1165 return -EFAULT; 1166 1167 attr = kmalloc(sizeof *attr, GFP_KERNEL); 1168 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); 1169 if (!attr || !init_attr) { 1170 ret = -ENOMEM; 1171 goto out; 1172 } 1173 1174 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 1175 if (!qp) { 1176 ret = -EINVAL; 1177 goto out; 1178 } 1179 1180 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1181 1182 put_qp_read(qp); 1183 1184 if (ret) 1185 goto out; 1186 1187 memset(&resp, 0, sizeof resp); 1188 1189 resp.qp_state = attr->qp_state; 1190 resp.cur_qp_state = attr->cur_qp_state; 1191 resp.path_mtu = attr->path_mtu; 1192 resp.path_mig_state = attr->path_mig_state; 1193 resp.qkey = attr->qkey; 1194 resp.rq_psn = attr->rq_psn; 1195 resp.sq_psn = attr->sq_psn; 1196 resp.dest_qp_num = attr->dest_qp_num; 1197 resp.qp_access_flags = attr->qp_access_flags; 1198 resp.pkey_index = attr->pkey_index; 1199 resp.alt_pkey_index = attr->alt_pkey_index; 1200 resp.sq_draining = attr->sq_draining; 1201 resp.max_rd_atomic = attr->max_rd_atomic; 1202 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1203 resp.min_rnr_timer = attr->min_rnr_timer; 1204 resp.port_num = attr->port_num; 1205 resp.timeout = attr->timeout; 1206 resp.retry_cnt = attr->retry_cnt; 1207 resp.rnr_retry = attr->rnr_retry; 1208 resp.alt_port_num = attr->alt_port_num; 1209 resp.alt_timeout = attr->alt_timeout; 1210 1211 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16); 1212 resp.dest.flow_label = attr->ah_attr.grh.flow_label; 1213 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index; 1214 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit; 1215 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class; 1216 resp.dest.dlid = attr->ah_attr.dlid; 1217 resp.dest.sl = attr->ah_attr.sl; 1218 resp.dest.src_path_bits = attr->ah_attr.src_path_bits; 1219 resp.dest.static_rate = attr->ah_attr.static_rate; 1220 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH); 1221 resp.dest.port_num = attr->ah_attr.port_num; 1222 1223 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16); 1224 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label; 1225 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index; 1226 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit; 1227 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class; 1228 resp.alt_dest.dlid = attr->alt_ah_attr.dlid; 1229 resp.alt_dest.sl = attr->alt_ah_attr.sl; 1230 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits; 1231 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate; 1232 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH); 1233 resp.alt_dest.port_num = attr->alt_ah_attr.port_num; 1234 1235 resp.max_send_wr = init_attr->cap.max_send_wr; 1236 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1237 resp.max_send_sge = init_attr->cap.max_send_sge; 1238 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1239 resp.max_inline_data = init_attr->cap.max_inline_data; 1240 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1241 1242 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1243 &resp, sizeof resp)) 1244 ret = -EFAULT; 1245 1246out: 1247 kfree(attr); 1248 kfree(init_attr); 1249 1250 return ret ? ret : in_len; 1251} 1252 1253ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file, 1254 const char __user *buf, int in_len, 1255 int out_len) 1256{ 1257 struct ib_uverbs_modify_qp cmd; 1258 struct ib_udata udata; 1259 struct ib_qp *qp; 1260 struct ib_qp_attr *attr; 1261 int ret; 1262 1263 if (copy_from_user(&cmd, buf, sizeof cmd)) 1264 return -EFAULT; 1265 1266 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, 1267 out_len); 1268 1269 attr = kmalloc(sizeof *attr, GFP_KERNEL); 1270 if (!attr) 1271 return -ENOMEM; 1272 1273 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 1274 if (!qp) { 1275 ret = -EINVAL; 1276 goto out; 1277 } 1278 1279 attr->qp_state = cmd.qp_state; 1280 attr->cur_qp_state = cmd.cur_qp_state; 1281 attr->path_mtu = cmd.path_mtu; 1282 attr->path_mig_state = cmd.path_mig_state; 1283 attr->qkey = cmd.qkey; 1284 attr->rq_psn = cmd.rq_psn; 1285 attr->sq_psn = cmd.sq_psn; 1286 attr->dest_qp_num = cmd.dest_qp_num; 1287 attr->qp_access_flags = cmd.qp_access_flags; 1288 attr->pkey_index = cmd.pkey_index; 1289 attr->alt_pkey_index = cmd.alt_pkey_index; 1290 attr->en_sqd_async_notify = cmd.en_sqd_async_notify; 1291 attr->max_rd_atomic = cmd.max_rd_atomic; 1292 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic; 1293 attr->min_rnr_timer = cmd.min_rnr_timer; 1294 attr->port_num = cmd.port_num; 1295 attr->timeout = cmd.timeout; 1296 attr->retry_cnt = cmd.retry_cnt; 1297 attr->rnr_retry = cmd.rnr_retry; 1298 attr->alt_port_num = cmd.alt_port_num; 1299 attr->alt_timeout = cmd.alt_timeout; 1300 1301 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16); 1302 attr->ah_attr.grh.flow_label = cmd.dest.flow_label; 1303 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index; 1304 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit; 1305 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class; 1306 attr->ah_attr.dlid = cmd.dest.dlid; 1307 attr->ah_attr.sl = cmd.dest.sl; 1308 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits; 1309 attr->ah_attr.static_rate = cmd.dest.static_rate; 1310 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0; 1311 attr->ah_attr.port_num = cmd.dest.port_num; 1312 1313 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16); 1314 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label; 1315 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index; 1316 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit; 1317 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class; 1318 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid; 1319 attr->alt_ah_attr.sl = cmd.alt_dest.sl; 1320 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits; 1321 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate; 1322 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0; 1323 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num; 1324 1325 ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata); 1326 1327 put_qp_read(qp); 1328 1329 if (ret) 1330 goto out; 1331 1332 ret = in_len; 1333 1334out: 1335 kfree(attr); 1336 1337 return ret; 1338} 1339 1340ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file, 1341 const char __user *buf, int in_len, 1342 int out_len) 1343{ 1344 struct ib_uverbs_destroy_qp cmd; 1345 struct ib_uverbs_destroy_qp_resp resp; 1346 struct ib_uobject *uobj; 1347 struct ib_qp *qp; 1348 struct ib_uqp_object *obj; 1349 int ret = -EINVAL; 1350 1351 if (copy_from_user(&cmd, buf, sizeof cmd)) 1352 return -EFAULT; 1353 1354 memset(&resp, 0, sizeof resp); 1355 1356 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext); 1357 if (!uobj) 1358 return -EINVAL; 1359 qp = uobj->object; 1360 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 1361 1362 if (!list_empty(&obj->mcast_list)) { 1363 put_uobj_write(uobj); 1364 return -EBUSY; 1365 } 1366 1367 ret = ib_destroy_qp(qp); 1368 if (!ret) 1369 uobj->live = 0; 1370 1371 put_uobj_write(uobj); 1372 1373 if (ret) 1374 return ret; 1375 1376 idr_remove_uobj(&ib_uverbs_qp_idr, uobj); 1377 1378 mutex_lock(&file->mutex); 1379 list_del(&uobj->list); 1380 mutex_unlock(&file->mutex); 1381 1382 ib_uverbs_release_uevent(file, &obj->uevent); 1383 1384 resp.events_reported = obj->uevent.events_reported; 1385 1386 put_uobj(uobj); 1387 1388 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1389 &resp, sizeof resp)) 1390 return -EFAULT; 1391 1392 return in_len; 1393} 1394 1395ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file, 1396 const char __user *buf, int in_len, 1397 int out_len) 1398{ 1399 struct ib_uverbs_post_send cmd; 1400 struct ib_uverbs_post_send_resp resp; 1401 struct ib_uverbs_send_wr *user_wr; 1402 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr; 1403 struct ib_qp *qp; 1404 int i, sg_ind; 1405 int is_ud; 1406 ssize_t ret = -EINVAL; 1407 1408 if (copy_from_user(&cmd, buf, sizeof cmd)) 1409 return -EFAULT; 1410 1411 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count + 1412 cmd.sge_count * sizeof (struct ib_uverbs_sge)) 1413 return -EINVAL; 1414 1415 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr)) 1416 return -EINVAL; 1417 1418 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 1419 if (!user_wr) 1420 return -ENOMEM; 1421 1422 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 1423 if (!qp) 1424 goto out; 1425 1426 is_ud = qp->qp_type == IB_QPT_UD; 1427 sg_ind = 0; 1428 last = NULL; 1429 for (i = 0; i < cmd.wr_count; ++i) { 1430 if (copy_from_user(user_wr, 1431 buf + sizeof cmd + i * cmd.wqe_size, 1432 cmd.wqe_size)) { 1433 ret = -EFAULT; 1434 goto out_put; 1435 } 1436 1437 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 1438 ret = -EINVAL; 1439 goto out_put; 1440 } 1441 1442 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + 1443 user_wr->num_sge * sizeof (struct ib_sge), 1444 GFP_KERNEL); 1445 if (!next) { 1446 ret = -ENOMEM; 1447 goto out_put; 1448 } 1449 1450 if (!last) 1451 wr = next; 1452 else 1453 last->next = next; 1454 last = next; 1455 1456 next->next = NULL; 1457 next->wr_id = user_wr->wr_id; 1458 next->num_sge = user_wr->num_sge; 1459 next->opcode = user_wr->opcode; 1460 next->send_flags = user_wr->send_flags; 1461 next->imm_data = (__be32 __force) user_wr->imm_data; 1462 1463 if (is_ud) { 1464 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah, 1465 file->ucontext); 1466 if (!next->wr.ud.ah) { 1467 ret = -EINVAL; 1468 goto out_put; 1469 } 1470 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn; 1471 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey; 1472 } else { 1473 switch (next->opcode) { 1474 case IB_WR_RDMA_WRITE: 1475 case IB_WR_RDMA_WRITE_WITH_IMM: 1476 case IB_WR_RDMA_READ: 1477 next->wr.rdma.remote_addr = 1478 user_wr->wr.rdma.remote_addr; 1479 next->wr.rdma.rkey = 1480 user_wr->wr.rdma.rkey; 1481 break; 1482 case IB_WR_ATOMIC_CMP_AND_SWP: 1483 case IB_WR_ATOMIC_FETCH_AND_ADD: 1484 next->wr.atomic.remote_addr = 1485 user_wr->wr.atomic.remote_addr; 1486 next->wr.atomic.compare_add = 1487 user_wr->wr.atomic.compare_add; 1488 next->wr.atomic.swap = user_wr->wr.atomic.swap; 1489 next->wr.atomic.rkey = user_wr->wr.atomic.rkey; 1490 break; 1491 default: 1492 break; 1493 } 1494 } 1495 1496 if (next->num_sge) { 1497 next->sg_list = (void *) next + 1498 ALIGN(sizeof *next, sizeof (struct ib_sge)); 1499 if (copy_from_user(next->sg_list, 1500 buf + sizeof cmd + 1501 cmd.wr_count * cmd.wqe_size + 1502 sg_ind * sizeof (struct ib_sge), 1503 next->num_sge * sizeof (struct ib_sge))) { 1504 ret = -EFAULT; 1505 goto out_put; 1506 } 1507 sg_ind += next->num_sge; 1508 } else 1509 next->sg_list = NULL; 1510 } 1511 1512 resp.bad_wr = 0; 1513 ret = qp->device->post_send(qp, wr, &bad_wr); 1514 if (ret) 1515 for (next = wr; next; next = next->next) { 1516 ++resp.bad_wr; 1517 if (next == bad_wr) 1518 break; 1519 } 1520 1521 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1522 &resp, sizeof resp)) 1523 ret = -EFAULT; 1524 1525out_put: 1526 put_qp_read(qp); 1527 1528 while (wr) { 1529 if (is_ud && wr->wr.ud.ah) 1530 put_ah_read(wr->wr.ud.ah); 1531 next = wr->next; 1532 kfree(wr); 1533 wr = next; 1534 } 1535 1536out: 1537 kfree(user_wr); 1538 1539 return ret ? ret : in_len; 1540} 1541 1542static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf, 1543 int in_len, 1544 u32 wr_count, 1545 u32 sge_count, 1546 u32 wqe_size) 1547{ 1548 struct ib_uverbs_recv_wr *user_wr; 1549 struct ib_recv_wr *wr = NULL, *last, *next; 1550 int sg_ind; 1551 int i; 1552 int ret; 1553 1554 if (in_len < wqe_size * wr_count + 1555 sge_count * sizeof (struct ib_uverbs_sge)) 1556 return ERR_PTR(-EINVAL); 1557 1558 if (wqe_size < sizeof (struct ib_uverbs_recv_wr)) 1559 return ERR_PTR(-EINVAL); 1560 1561 user_wr = kmalloc(wqe_size, GFP_KERNEL); 1562 if (!user_wr) 1563 return ERR_PTR(-ENOMEM); 1564 1565 sg_ind = 0; 1566 last = NULL; 1567 for (i = 0; i < wr_count; ++i) { 1568 if (copy_from_user(user_wr, buf + i * wqe_size, 1569 wqe_size)) { 1570 ret = -EFAULT; 1571 goto err; 1572 } 1573 1574 if (user_wr->num_sge + sg_ind > sge_count) { 1575 ret = -EINVAL; 1576 goto err; 1577 } 1578 1579 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + 1580 user_wr->num_sge * sizeof (struct ib_sge), 1581 GFP_KERNEL); 1582 if (!next) { 1583 ret = -ENOMEM; 1584 goto err; 1585 } 1586 1587 if (!last) 1588 wr = next; 1589 else 1590 last->next = next; 1591 last = next; 1592 1593 next->next = NULL; 1594 next->wr_id = user_wr->wr_id; 1595 next->num_sge = user_wr->num_sge; 1596 1597 if (next->num_sge) { 1598 next->sg_list = (void *) next + 1599 ALIGN(sizeof *next, sizeof (struct ib_sge)); 1600 if (copy_from_user(next->sg_list, 1601 buf + wr_count * wqe_size + 1602 sg_ind * sizeof (struct ib_sge), 1603 next->num_sge * sizeof (struct ib_sge))) { 1604 ret = -EFAULT; 1605 goto err; 1606 } 1607 sg_ind += next->num_sge; 1608 } else 1609 next->sg_list = NULL; 1610 } 1611 1612 kfree(user_wr); 1613 return wr; 1614 1615err: 1616 kfree(user_wr); 1617 1618 while (wr) { 1619 next = wr->next; 1620 kfree(wr); 1621 wr = next; 1622 } 1623 1624 return ERR_PTR(ret); 1625} 1626 1627ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file, 1628 const char __user *buf, int in_len, 1629 int out_len) 1630{ 1631 struct ib_uverbs_post_recv cmd; 1632 struct ib_uverbs_post_recv_resp resp; 1633 struct ib_recv_wr *wr, *next, *bad_wr; 1634 struct ib_qp *qp; 1635 ssize_t ret = -EINVAL; 1636 1637 if (copy_from_user(&cmd, buf, sizeof cmd)) 1638 return -EFAULT; 1639 1640 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd, 1641 in_len - sizeof cmd, cmd.wr_count, 1642 cmd.sge_count, cmd.wqe_size); 1643 if (IS_ERR(wr)) 1644 return PTR_ERR(wr); 1645 1646 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 1647 if (!qp) 1648 goto out; 1649 1650 resp.bad_wr = 0; 1651 ret = qp->device->post_recv(qp, wr, &bad_wr); 1652 1653 put_qp_read(qp); 1654 1655 if (ret) 1656 for (next = wr; next; next = next->next) { 1657 ++resp.bad_wr; 1658 if (next == bad_wr) 1659 break; 1660 } 1661 1662 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1663 &resp, sizeof resp)) 1664 ret = -EFAULT; 1665 1666out: 1667 while (wr) { 1668 next = wr->next; 1669 kfree(wr); 1670 wr = next; 1671 } 1672 1673 return ret ? ret : in_len; 1674} 1675 1676ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file, 1677 const char __user *buf, int in_len, 1678 int out_len) 1679{ 1680 struct ib_uverbs_post_srq_recv cmd; 1681 struct ib_uverbs_post_srq_recv_resp resp; 1682 struct ib_recv_wr *wr, *next, *bad_wr; 1683 struct ib_srq *srq; 1684 ssize_t ret = -EINVAL; 1685 1686 if (copy_from_user(&cmd, buf, sizeof cmd)) 1687 return -EFAULT; 1688 1689 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd, 1690 in_len - sizeof cmd, cmd.wr_count, 1691 cmd.sge_count, cmd.wqe_size); 1692 if (IS_ERR(wr)) 1693 return PTR_ERR(wr); 1694 1695 srq = idr_read_srq(cmd.srq_handle, file->ucontext); 1696 if (!srq) 1697 goto out; 1698 1699 resp.bad_wr = 0; 1700 ret = srq->device->post_srq_recv(srq, wr, &bad_wr); 1701 1702 put_srq_read(srq); 1703 1704 if (ret) 1705 for (next = wr; next; next = next->next) { 1706 ++resp.bad_wr; 1707 if (next == bad_wr) 1708 break; 1709 } 1710 1711 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1712 &resp, sizeof resp)) 1713 ret = -EFAULT; 1714 1715out: 1716 while (wr) { 1717 next = wr->next; 1718 kfree(wr); 1719 wr = next; 1720 } 1721 1722 return ret ? ret : in_len; 1723} 1724 1725ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file, 1726 const char __user *buf, int in_len, 1727 int out_len) 1728{ 1729 struct ib_uverbs_create_ah cmd; 1730 struct ib_uverbs_create_ah_resp resp; 1731 struct ib_uobject *uobj; 1732 struct ib_pd *pd; 1733 struct ib_ah *ah; 1734 struct ib_ah_attr attr; 1735 int ret; 1736 1737 if (out_len < sizeof resp) 1738 return -ENOSPC; 1739 1740 if (copy_from_user(&cmd, buf, sizeof cmd)) 1741 return -EFAULT; 1742 1743 uobj = kmalloc(sizeof *uobj, GFP_KERNEL); 1744 if (!uobj) 1745 return -ENOMEM; 1746 1747 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key); 1748 down_write(&uobj->mutex); 1749 1750 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 1751 if (!pd) { 1752 ret = -EINVAL; 1753 goto err; 1754 } 1755 1756 attr.dlid = cmd.attr.dlid; 1757 attr.sl = cmd.attr.sl; 1758 attr.src_path_bits = cmd.attr.src_path_bits; 1759 attr.static_rate = cmd.attr.static_rate; 1760 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0; 1761 attr.port_num = cmd.attr.port_num; 1762 attr.grh.flow_label = cmd.attr.grh.flow_label; 1763 attr.grh.sgid_index = cmd.attr.grh.sgid_index; 1764 attr.grh.hop_limit = cmd.attr.grh.hop_limit; 1765 attr.grh.traffic_class = cmd.attr.grh.traffic_class; 1766 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16); 1767 1768 ah = ib_create_ah(pd, &attr); 1769 if (IS_ERR(ah)) { 1770 ret = PTR_ERR(ah); 1771 goto err_put; 1772 } 1773 1774 ah->uobject = uobj; 1775 uobj->object = ah; 1776 1777 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj); 1778 if (ret) 1779 goto err_destroy; 1780 1781 resp.ah_handle = uobj->id; 1782 1783 if (copy_to_user((void __user *) (unsigned long) cmd.response, 1784 &resp, sizeof resp)) { 1785 ret = -EFAULT; 1786 goto err_copy; 1787 } 1788 1789 put_pd_read(pd); 1790 1791 mutex_lock(&file->mutex); 1792 list_add_tail(&uobj->list, &file->ucontext->ah_list); 1793 mutex_unlock(&file->mutex); 1794 1795 uobj->live = 1; 1796 1797 up_write(&uobj->mutex); 1798 1799 return in_len; 1800 1801err_copy: 1802 idr_remove_uobj(&ib_uverbs_ah_idr, uobj); 1803 1804err_destroy: 1805 ib_destroy_ah(ah); 1806 1807err_put: 1808 put_pd_read(pd); 1809 1810err: 1811 put_uobj_write(uobj); 1812 return ret; 1813} 1814 1815ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file, 1816 const char __user *buf, int in_len, int out_len) 1817{ 1818 struct ib_uverbs_destroy_ah cmd; 1819 struct ib_ah *ah; 1820 struct ib_uobject *uobj; 1821 int ret; 1822 1823 if (copy_from_user(&cmd, buf, sizeof cmd)) 1824 return -EFAULT; 1825 1826 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext); 1827 if (!uobj) 1828 return -EINVAL; 1829 ah = uobj->object; 1830 1831 ret = ib_destroy_ah(ah); 1832 if (!ret) 1833 uobj->live = 0; 1834 1835 put_uobj_write(uobj); 1836 1837 if (ret) 1838 return ret; 1839 1840 idr_remove_uobj(&ib_uverbs_ah_idr, uobj); 1841 1842 mutex_lock(&file->mutex); 1843 list_del(&uobj->list); 1844 mutex_unlock(&file->mutex); 1845 1846 put_uobj(uobj); 1847 1848 return in_len; 1849} 1850 1851ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file, 1852 const char __user *buf, int in_len, 1853 int out_len) 1854{ 1855 struct ib_uverbs_attach_mcast cmd; 1856 struct ib_qp *qp; 1857 struct ib_uqp_object *obj; 1858 struct ib_uverbs_mcast_entry *mcast; 1859 int ret; 1860 1861 if (copy_from_user(&cmd, buf, sizeof cmd)) 1862 return -EFAULT; 1863 1864 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 1865 if (!qp) 1866 return -EINVAL; 1867 1868 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); 1869 1870 list_for_each_entry(mcast, &obj->mcast_list, list) 1871 if (cmd.mlid == mcast->lid && 1872 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 1873 ret = 0; 1874 goto out_put; 1875 } 1876 1877 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 1878 if (!mcast) { 1879 ret = -ENOMEM; 1880 goto out_put; 1881 } 1882 1883 mcast->lid = cmd.mlid; 1884 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 1885 1886 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 1887 if (!ret) 1888 list_add_tail(&mcast->list, &obj->mcast_list); 1889 else 1890 kfree(mcast); 1891 1892out_put: 1893 put_qp_read(qp); 1894 1895 return ret ? ret : in_len; 1896} 1897 1898ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file, 1899 const char __user *buf, int in_len, 1900 int out_len) 1901{ 1902 struct ib_uverbs_detach_mcast cmd; 1903 struct ib_uqp_object *obj; 1904 struct ib_qp *qp; 1905 struct ib_uverbs_mcast_entry *mcast; 1906 int ret = -EINVAL; 1907 1908 if (copy_from_user(&cmd, buf, sizeof cmd)) 1909 return -EFAULT; 1910 1911 qp = idr_read_qp(cmd.qp_handle, file->ucontext); 1912 if (!qp) 1913 return -EINVAL; 1914 1915 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid); 1916 if (ret) 1917 goto out_put; 1918 1919 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); 1920 1921 list_for_each_entry(mcast, &obj->mcast_list, list) 1922 if (cmd.mlid == mcast->lid && 1923 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 1924 list_del(&mcast->list); 1925 kfree(mcast); 1926 break; 1927 } 1928 1929out_put: 1930 put_qp_read(qp); 1931 1932 return ret ? ret : in_len; 1933} 1934 1935ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file, 1936 const char __user *buf, int in_len, 1937 int out_len) 1938{ 1939 struct ib_uverbs_create_srq cmd; 1940 struct ib_uverbs_create_srq_resp resp; 1941 struct ib_udata udata; 1942 struct ib_uevent_object *obj; 1943 struct ib_pd *pd; 1944 struct ib_srq *srq; 1945 struct ib_srq_init_attr attr; 1946 int ret; 1947 1948 if (out_len < sizeof resp) 1949 return -ENOSPC; 1950 1951 if (copy_from_user(&cmd, buf, sizeof cmd)) 1952 return -EFAULT; 1953 1954 INIT_UDATA(&udata, buf + sizeof cmd, 1955 (unsigned long) cmd.response + sizeof resp, 1956 in_len - sizeof cmd, out_len - sizeof resp); 1957 1958 obj = kmalloc(sizeof *obj, GFP_KERNEL); 1959 if (!obj) 1960 return -ENOMEM; 1961 1962 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key); 1963 down_write(&obj->uobject.mutex); 1964 1965 pd = idr_read_pd(cmd.pd_handle, file->ucontext); 1966 if (!pd) { 1967 ret = -EINVAL; 1968 goto err; 1969 } 1970 1971 attr.event_handler = ib_uverbs_srq_event_handler; 1972 attr.srq_context = file; 1973 attr.attr.max_wr = cmd.max_wr; 1974 attr.attr.max_sge = cmd.max_sge; 1975 attr.attr.srq_limit = cmd.srq_limit; 1976 1977 obj->events_reported = 0; 1978 INIT_LIST_HEAD(&obj->event_list); 1979 1980 srq = pd->device->create_srq(pd, &attr, &udata); 1981 if (IS_ERR(srq)) { 1982 ret = PTR_ERR(srq); 1983 goto err_put; 1984 } 1985 1986 srq->device = pd->device; 1987 srq->pd = pd; 1988 srq->uobject = &obj->uobject; 1989 srq->event_handler = attr.event_handler; 1990 srq->srq_context = attr.srq_context; 1991 atomic_inc(&pd->usecnt); 1992 atomic_set(&srq->usecnt, 0); 1993 1994 obj->uobject.object = srq; 1995 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject); 1996 if (ret) 1997 goto err_destroy; 1998 1999 memset(&resp, 0, sizeof resp); 2000 resp.srq_handle = obj->uobject.id; 2001 resp.max_wr = attr.attr.max_wr; 2002 resp.max_sge = attr.attr.max_sge; 2003 2004 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2005 &resp, sizeof resp)) { 2006 ret = -EFAULT; 2007 goto err_copy; 2008 } 2009 2010 put_pd_read(pd); 2011 2012 mutex_lock(&file->mutex); 2013 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list); 2014 mutex_unlock(&file->mutex); 2015 2016 obj->uobject.live = 1; 2017 2018 up_write(&obj->uobject.mutex); 2019 2020 return in_len; 2021 2022err_copy: 2023 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject); 2024 2025err_destroy: 2026 ib_destroy_srq(srq); 2027 2028err_put: 2029 put_pd_read(pd); 2030 2031err: 2032 put_uobj_write(&obj->uobject); 2033 return ret; 2034} 2035 2036ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file, 2037 const char __user *buf, int in_len, 2038 int out_len) 2039{ 2040 struct ib_uverbs_modify_srq cmd; 2041 struct ib_udata udata; 2042 struct ib_srq *srq; 2043 struct ib_srq_attr attr; 2044 int ret; 2045 2046 if (copy_from_user(&cmd, buf, sizeof cmd)) 2047 return -EFAULT; 2048 2049 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, 2050 out_len); 2051 2052 srq = idr_read_srq(cmd.srq_handle, file->ucontext); 2053 if (!srq) 2054 return -EINVAL; 2055 2056 attr.max_wr = cmd.max_wr; 2057 attr.srq_limit = cmd.srq_limit; 2058 2059 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata); 2060 2061 put_srq_read(srq); 2062 2063 return ret ? ret : in_len; 2064} 2065 2066ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file, 2067 const char __user *buf, 2068 int in_len, int out_len) 2069{ 2070 struct ib_uverbs_query_srq cmd; 2071 struct ib_uverbs_query_srq_resp resp; 2072 struct ib_srq_attr attr; 2073 struct ib_srq *srq; 2074 int ret; 2075 2076 if (out_len < sizeof resp) 2077 return -ENOSPC; 2078 2079 if (copy_from_user(&cmd, buf, sizeof cmd)) 2080 return -EFAULT; 2081 2082 srq = idr_read_srq(cmd.srq_handle, file->ucontext); 2083 if (!srq) 2084 return -EINVAL; 2085 2086 ret = ib_query_srq(srq, &attr); 2087 2088 put_srq_read(srq); 2089 2090 if (ret) 2091 return ret; 2092 2093 memset(&resp, 0, sizeof resp); 2094 2095 resp.max_wr = attr.max_wr; 2096 resp.max_sge = attr.max_sge; 2097 resp.srq_limit = attr.srq_limit; 2098 2099 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2100 &resp, sizeof resp)) 2101 return -EFAULT; 2102 2103 return in_len; 2104} 2105 2106ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file, 2107 const char __user *buf, int in_len, 2108 int out_len) 2109{ 2110 struct ib_uverbs_destroy_srq cmd; 2111 struct ib_uverbs_destroy_srq_resp resp; 2112 struct ib_uobject *uobj; 2113 struct ib_srq *srq; 2114 struct ib_uevent_object *obj; 2115 int ret = -EINVAL; 2116 2117 if (copy_from_user(&cmd, buf, sizeof cmd)) 2118 return -EFAULT; 2119 2120 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext); 2121 if (!uobj) 2122 return -EINVAL; 2123 srq = uobj->object; 2124 obj = container_of(uobj, struct ib_uevent_object, uobject); 2125 2126 ret = ib_destroy_srq(srq); 2127 if (!ret) 2128 uobj->live = 0; 2129 2130 put_uobj_write(uobj); 2131 2132 if (ret) 2133 return ret; 2134 2135 idr_remove_uobj(&ib_uverbs_srq_idr, uobj); 2136 2137 mutex_lock(&file->mutex); 2138 list_del(&uobj->list); 2139 mutex_unlock(&file->mutex); 2140 2141 ib_uverbs_release_uevent(file, obj); 2142 2143 memset(&resp, 0, sizeof resp); 2144 resp.events_reported = obj->events_reported; 2145 2146 put_uobj(uobj); 2147 2148 if (copy_to_user((void __user *) (unsigned long) cmd.response, 2149 &resp, sizeof resp)) 2150 ret = -EFAULT; 2151 2152 return ret ? ret : in_len; 2153} 2154