1 /* 2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/dma-mapping.h> 35 #include <net/addrconf.h> 36 #include "rxe.h" 37 #include "rxe_loc.h" 38 #include "rxe_queue.h" 39 #include "rxe_hw_counters.h" 40 41 static int rxe_query_device(struct ib_device *dev, 42 struct ib_device_attr *attr, 43 struct ib_udata *uhw) 44 { 45 struct rxe_dev *rxe = to_rdev(dev); 46 47 if (uhw->inlen || uhw->outlen) 48 return -EINVAL; 49 50 *attr = rxe->attr; 51 return 0; 52 } 53 54 static int rxe_query_port(struct ib_device *dev, 55 u8 port_num, struct ib_port_attr *attr) 56 { 57 struct rxe_dev *rxe = to_rdev(dev); 58 struct rxe_port *port; 59 int rc = -EINVAL; 60 61 if (unlikely(port_num != 1)) { 62 pr_warn("invalid port_number %d\n", port_num); 63 goto out; 64 } 65 66 port = &rxe->port; 67 68 /* *attr being zeroed by the caller, avoid zeroing it here */ 69 *attr = port->attr; 70 71 mutex_lock(&rxe->usdev_lock); 72 rc = ib_get_eth_speed(dev, port_num, &attr->active_speed, 73 &attr->active_width); 74 mutex_unlock(&rxe->usdev_lock); 75 76 out: 77 return rc; 78 } 79 80 static int rxe_query_gid(struct ib_device *device, 81 u8 port_num, int index, union ib_gid *gid) 82 { 83 int ret; 84 85 if (index > RXE_PORT_GID_TBL_LEN) 86 return -EINVAL; 87 88 ret = ib_get_cached_gid(device, port_num, index, gid, NULL); 89 if (ret == -EAGAIN) { 90 memcpy(gid, &zgid, sizeof(*gid)); 91 return 0; 92 } 93 94 return ret; 95 } 96 97 static int rxe_add_gid(struct ib_device *device, u8 port_num, unsigned int 98 index, const union ib_gid *gid, 99 const struct ib_gid_attr *attr, void **context) 100 { 101 if (index >= RXE_PORT_GID_TBL_LEN) 102 return -EINVAL; 103 return 0; 104 } 105 106 static int rxe_del_gid(struct ib_device *device, u8 port_num, unsigned int 107 index, void **context) 108 { 109 if (index >= RXE_PORT_GID_TBL_LEN) 110 return -EINVAL; 111 return 0; 112 } 113 114 static struct net_device *rxe_get_netdev(struct ib_device *device, 115 u8 port_num) 116 { 117 struct rxe_dev *rxe = to_rdev(device); 118 119 if (rxe->ndev) { 120 dev_hold(rxe->ndev); 121 return rxe->ndev; 122 } 123 124 return NULL; 125 } 126 127 static int rxe_query_pkey(struct ib_device *device, 128 u8 port_num, u16 index, u16 *pkey) 129 { 130 struct rxe_dev *rxe = to_rdev(device); 131 struct rxe_port *port; 132 133 if (unlikely(port_num != 1)) { 134 dev_warn(device->dev.parent, "invalid port_num = %d\n", 135 port_num); 136 goto err1; 137 } 138 139 port = &rxe->port; 140 141 if (unlikely(index >= port->attr.pkey_tbl_len)) { 142 dev_warn(device->dev.parent, "invalid index = %d\n", 143 index); 144 goto err1; 145 } 146 147 *pkey = port->pkey_tbl[index]; 148 return 0; 149 150 err1: 151 return -EINVAL; 152 } 153 154 static int rxe_modify_device(struct ib_device *dev, 155 int mask, struct ib_device_modify *attr) 156 { 157 struct rxe_dev *rxe = to_rdev(dev); 158 159 if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) 160 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid); 161 162 if (mask & IB_DEVICE_MODIFY_NODE_DESC) { 163 memcpy(rxe->ib_dev.node_desc, 164 attr->node_desc, sizeof(rxe->ib_dev.node_desc)); 165 } 166 167 return 0; 168 } 169 170 static int rxe_modify_port(struct ib_device *dev, 171 u8 port_num, int mask, struct ib_port_modify *attr) 172 { 173 struct rxe_dev *rxe = to_rdev(dev); 174 struct rxe_port *port; 175 176 if (unlikely(port_num != 1)) { 177 pr_warn("invalid port_num = %d\n", port_num); 178 goto err1; 179 } 180 181 port = &rxe->port; 182 183 port->attr.port_cap_flags |= attr->set_port_cap_mask; 184 port->attr.port_cap_flags &= ~attr->clr_port_cap_mask; 185 186 if (mask & IB_PORT_RESET_QKEY_CNTR) 187 port->attr.qkey_viol_cntr = 0; 188 189 return 0; 190 191 err1: 192 return -EINVAL; 193 } 194 195 static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev, 196 u8 port_num) 197 { 198 struct rxe_dev *rxe = to_rdev(dev); 199 200 return rxe_link_layer(rxe, port_num); 201 } 202 203 static struct ib_ucontext *rxe_alloc_ucontext(struct ib_device *dev, 204 struct ib_udata *udata) 205 { 206 struct rxe_dev *rxe = to_rdev(dev); 207 struct rxe_ucontext *uc; 208 209 uc = rxe_alloc(&rxe->uc_pool); 210 return uc ? &uc->ibuc : ERR_PTR(-ENOMEM); 211 } 212 213 static int rxe_dealloc_ucontext(struct ib_ucontext *ibuc) 214 { 215 struct rxe_ucontext *uc = to_ruc(ibuc); 216 217 rxe_drop_ref(uc); 218 return 0; 219 } 220 221 static int rxe_port_immutable(struct ib_device *dev, u8 port_num, 222 struct ib_port_immutable *immutable) 223 { 224 int err; 225 struct ib_port_attr attr; 226 227 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP; 228 229 err = ib_query_port(dev, port_num, &attr); 230 if (err) 231 return err; 232 233 immutable->pkey_tbl_len = attr.pkey_tbl_len; 234 immutable->gid_tbl_len = attr.gid_tbl_len; 235 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 236 237 return 0; 238 } 239 240 static struct ib_pd *rxe_alloc_pd(struct ib_device *dev, 241 struct ib_ucontext *context, 242 struct ib_udata *udata) 243 { 244 struct rxe_dev *rxe = to_rdev(dev); 245 struct rxe_pd *pd; 246 247 pd = rxe_alloc(&rxe->pd_pool); 248 return pd ? &pd->ibpd : ERR_PTR(-ENOMEM); 249 } 250 251 static int rxe_dealloc_pd(struct ib_pd *ibpd) 252 { 253 struct rxe_pd *pd = to_rpd(ibpd); 254 255 rxe_drop_ref(pd); 256 return 0; 257 } 258 259 static int rxe_init_av(struct rxe_dev *rxe, struct rdma_ah_attr *attr, 260 struct rxe_av *av) 261 { 262 int err; 263 union ib_gid sgid; 264 struct ib_gid_attr sgid_attr; 265 266 err = ib_get_cached_gid(&rxe->ib_dev, rdma_ah_get_port_num(attr), 267 rdma_ah_read_grh(attr)->sgid_index, &sgid, 268 &sgid_attr); 269 if (err) { 270 pr_err("Failed to query sgid. err = %d\n", err); 271 return err; 272 } 273 274 rxe_av_from_attr(rdma_ah_get_port_num(attr), av, attr); 275 rxe_av_fill_ip_info(av, attr, &sgid_attr, &sgid); 276 277 if (sgid_attr.ndev) 278 dev_put(sgid_attr.ndev); 279 return 0; 280 } 281 282 static struct ib_ah *rxe_create_ah(struct ib_pd *ibpd, 283 struct rdma_ah_attr *attr, 284 struct ib_udata *udata) 285 286 { 287 int err; 288 struct rxe_dev *rxe = to_rdev(ibpd->device); 289 struct rxe_pd *pd = to_rpd(ibpd); 290 struct rxe_ah *ah; 291 292 err = rxe_av_chk_attr(rxe, attr); 293 if (err) 294 goto err1; 295 296 ah = rxe_alloc(&rxe->ah_pool); 297 if (!ah) { 298 err = -ENOMEM; 299 goto err1; 300 } 301 302 rxe_add_ref(pd); 303 ah->pd = pd; 304 305 err = rxe_init_av(rxe, attr, &ah->av); 306 if (err) 307 goto err2; 308 309 return &ah->ibah; 310 311 err2: 312 rxe_drop_ref(pd); 313 rxe_drop_ref(ah); 314 err1: 315 return ERR_PTR(err); 316 } 317 318 static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) 319 { 320 int err; 321 struct rxe_dev *rxe = to_rdev(ibah->device); 322 struct rxe_ah *ah = to_rah(ibah); 323 324 err = rxe_av_chk_attr(rxe, attr); 325 if (err) 326 return err; 327 328 err = rxe_init_av(rxe, attr, &ah->av); 329 if (err) 330 return err; 331 332 return 0; 333 } 334 335 static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) 336 { 337 struct rxe_ah *ah = to_rah(ibah); 338 339 memset(attr, 0, sizeof(*attr)); 340 attr->type = ibah->type; 341 rxe_av_to_attr(&ah->av, attr); 342 return 0; 343 } 344 345 static int rxe_destroy_ah(struct ib_ah *ibah) 346 { 347 struct rxe_ah *ah = to_rah(ibah); 348 349 rxe_drop_ref(ah->pd); 350 rxe_drop_ref(ah); 351 return 0; 352 } 353 354 static int post_one_recv(struct rxe_rq *rq, struct ib_recv_wr *ibwr) 355 { 356 int err; 357 int i; 358 u32 length; 359 struct rxe_recv_wqe *recv_wqe; 360 int num_sge = ibwr->num_sge; 361 362 if (unlikely(queue_full(rq->queue))) { 363 err = -ENOMEM; 364 goto err1; 365 } 366 367 if (unlikely(num_sge > rq->max_sge)) { 368 err = -EINVAL; 369 goto err1; 370 } 371 372 length = 0; 373 for (i = 0; i < num_sge; i++) 374 length += ibwr->sg_list[i].length; 375 376 recv_wqe = producer_addr(rq->queue); 377 recv_wqe->wr_id = ibwr->wr_id; 378 recv_wqe->num_sge = num_sge; 379 380 memcpy(recv_wqe->dma.sge, ibwr->sg_list, 381 num_sge * sizeof(struct ib_sge)); 382 383 recv_wqe->dma.length = length; 384 recv_wqe->dma.resid = length; 385 recv_wqe->dma.num_sge = num_sge; 386 recv_wqe->dma.cur_sge = 0; 387 recv_wqe->dma.sge_offset = 0; 388 389 /* make sure all changes to the work queue are written before we 390 * update the producer pointer 391 */ 392 smp_wmb(); 393 394 advance_producer(rq->queue); 395 return 0; 396 397 err1: 398 return err; 399 } 400 401 static struct ib_srq *rxe_create_srq(struct ib_pd *ibpd, 402 struct ib_srq_init_attr *init, 403 struct ib_udata *udata) 404 { 405 int err; 406 struct rxe_dev *rxe = to_rdev(ibpd->device); 407 struct rxe_pd *pd = to_rpd(ibpd); 408 struct rxe_srq *srq; 409 struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL; 410 411 err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK); 412 if (err) 413 goto err1; 414 415 srq = rxe_alloc(&rxe->srq_pool); 416 if (!srq) { 417 err = -ENOMEM; 418 goto err1; 419 } 420 421 rxe_add_index(srq); 422 rxe_add_ref(pd); 423 srq->pd = pd; 424 425 err = rxe_srq_from_init(rxe, srq, init, context, udata); 426 if (err) 427 goto err2; 428 429 return &srq->ibsrq; 430 431 err2: 432 rxe_drop_ref(pd); 433 rxe_drop_index(srq); 434 rxe_drop_ref(srq); 435 err1: 436 return ERR_PTR(err); 437 } 438 439 static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, 440 enum ib_srq_attr_mask mask, 441 struct ib_udata *udata) 442 { 443 int err; 444 struct rxe_srq *srq = to_rsrq(ibsrq); 445 struct rxe_dev *rxe = to_rdev(ibsrq->device); 446 447 err = rxe_srq_chk_attr(rxe, srq, attr, mask); 448 if (err) 449 goto err1; 450 451 err = rxe_srq_from_attr(rxe, srq, attr, mask, udata); 452 if (err) 453 goto err1; 454 455 return 0; 456 457 err1: 458 return err; 459 } 460 461 static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr) 462 { 463 struct rxe_srq *srq = to_rsrq(ibsrq); 464 465 if (srq->error) 466 return -EINVAL; 467 468 attr->max_wr = srq->rq.queue->buf->index_mask; 469 attr->max_sge = srq->rq.max_sge; 470 attr->srq_limit = srq->limit; 471 return 0; 472 } 473 474 static int rxe_destroy_srq(struct ib_srq *ibsrq) 475 { 476 struct rxe_srq *srq = to_rsrq(ibsrq); 477 478 if (srq->rq.queue) 479 rxe_queue_cleanup(srq->rq.queue); 480 481 rxe_drop_ref(srq->pd); 482 rxe_drop_index(srq); 483 rxe_drop_ref(srq); 484 485 return 0; 486 } 487 488 static int rxe_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, 489 struct ib_recv_wr **bad_wr) 490 { 491 int err = 0; 492 unsigned long flags; 493 struct rxe_srq *srq = to_rsrq(ibsrq); 494 495 spin_lock_irqsave(&srq->rq.producer_lock, flags); 496 497 while (wr) { 498 err = post_one_recv(&srq->rq, wr); 499 if (unlikely(err)) 500 break; 501 wr = wr->next; 502 } 503 504 spin_unlock_irqrestore(&srq->rq.producer_lock, flags); 505 506 if (err) 507 *bad_wr = wr; 508 509 return err; 510 } 511 512 static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd, 513 struct ib_qp_init_attr *init, 514 struct ib_udata *udata) 515 { 516 int err; 517 struct rxe_dev *rxe = to_rdev(ibpd->device); 518 struct rxe_pd *pd = to_rpd(ibpd); 519 struct rxe_qp *qp; 520 521 err = rxe_qp_chk_init(rxe, init); 522 if (err) 523 goto err1; 524 525 qp = rxe_alloc(&rxe->qp_pool); 526 if (!qp) { 527 err = -ENOMEM; 528 goto err1; 529 } 530 531 if (udata) { 532 if (udata->inlen) { 533 err = -EINVAL; 534 goto err2; 535 } 536 qp->is_user = 1; 537 } 538 539 rxe_add_index(qp); 540 541 err = rxe_qp_from_init(rxe, qp, pd, init, udata, ibpd); 542 if (err) 543 goto err3; 544 545 return &qp->ibqp; 546 547 err3: 548 rxe_drop_index(qp); 549 err2: 550 rxe_drop_ref(qp); 551 err1: 552 return ERR_PTR(err); 553 } 554 555 static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 556 int mask, struct ib_udata *udata) 557 { 558 int err; 559 struct rxe_dev *rxe = to_rdev(ibqp->device); 560 struct rxe_qp *qp = to_rqp(ibqp); 561 562 err = rxe_qp_chk_attr(rxe, qp, attr, mask); 563 if (err) 564 goto err1; 565 566 err = rxe_qp_from_attr(qp, attr, mask, udata); 567 if (err) 568 goto err1; 569 570 return 0; 571 572 err1: 573 return err; 574 } 575 576 static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 577 int mask, struct ib_qp_init_attr *init) 578 { 579 struct rxe_qp *qp = to_rqp(ibqp); 580 581 rxe_qp_to_init(qp, init); 582 rxe_qp_to_attr(qp, attr, mask); 583 584 return 0; 585 } 586 587 static int rxe_destroy_qp(struct ib_qp *ibqp) 588 { 589 struct rxe_qp *qp = to_rqp(ibqp); 590 591 rxe_qp_destroy(qp); 592 rxe_drop_index(qp); 593 rxe_drop_ref(qp); 594 return 0; 595 } 596 597 static int validate_send_wr(struct rxe_qp *qp, struct ib_send_wr *ibwr, 598 unsigned int mask, unsigned int length) 599 { 600 int num_sge = ibwr->num_sge; 601 struct rxe_sq *sq = &qp->sq; 602 603 if (unlikely(num_sge > sq->max_sge)) 604 goto err1; 605 606 if (unlikely(mask & WR_ATOMIC_MASK)) { 607 if (length < 8) 608 goto err1; 609 610 if (atomic_wr(ibwr)->remote_addr & 0x7) 611 goto err1; 612 } 613 614 if (unlikely((ibwr->send_flags & IB_SEND_INLINE) && 615 (length > sq->max_inline))) 616 goto err1; 617 618 return 0; 619 620 err1: 621 return -EINVAL; 622 } 623 624 static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr, 625 struct ib_send_wr *ibwr) 626 { 627 wr->wr_id = ibwr->wr_id; 628 wr->num_sge = ibwr->num_sge; 629 wr->opcode = ibwr->opcode; 630 wr->send_flags = ibwr->send_flags; 631 632 if (qp_type(qp) == IB_QPT_UD || 633 qp_type(qp) == IB_QPT_SMI || 634 qp_type(qp) == IB_QPT_GSI) { 635 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn; 636 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey; 637 if (qp_type(qp) == IB_QPT_GSI) 638 wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index; 639 if (wr->opcode == IB_WR_SEND_WITH_IMM) 640 wr->ex.imm_data = ibwr->ex.imm_data; 641 } else { 642 switch (wr->opcode) { 643 case IB_WR_RDMA_WRITE_WITH_IMM: 644 wr->ex.imm_data = ibwr->ex.imm_data; 645 /* fall through */ 646 case IB_WR_RDMA_READ: 647 case IB_WR_RDMA_WRITE: 648 wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr; 649 wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey; 650 break; 651 case IB_WR_SEND_WITH_IMM: 652 wr->ex.imm_data = ibwr->ex.imm_data; 653 break; 654 case IB_WR_SEND_WITH_INV: 655 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; 656 break; 657 case IB_WR_ATOMIC_CMP_AND_SWP: 658 case IB_WR_ATOMIC_FETCH_AND_ADD: 659 wr->wr.atomic.remote_addr = 660 atomic_wr(ibwr)->remote_addr; 661 wr->wr.atomic.compare_add = 662 atomic_wr(ibwr)->compare_add; 663 wr->wr.atomic.swap = atomic_wr(ibwr)->swap; 664 wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey; 665 break; 666 case IB_WR_LOCAL_INV: 667 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; 668 break; 669 case IB_WR_REG_MR: 670 wr->wr.reg.mr = reg_wr(ibwr)->mr; 671 wr->wr.reg.key = reg_wr(ibwr)->key; 672 wr->wr.reg.access = reg_wr(ibwr)->access; 673 break; 674 default: 675 break; 676 } 677 } 678 } 679 680 static int init_send_wqe(struct rxe_qp *qp, struct ib_send_wr *ibwr, 681 unsigned int mask, unsigned int length, 682 struct rxe_send_wqe *wqe) 683 { 684 int num_sge = ibwr->num_sge; 685 struct ib_sge *sge; 686 int i; 687 u8 *p; 688 689 init_send_wr(qp, &wqe->wr, ibwr); 690 691 if (qp_type(qp) == IB_QPT_UD || 692 qp_type(qp) == IB_QPT_SMI || 693 qp_type(qp) == IB_QPT_GSI) 694 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av)); 695 696 if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) { 697 p = wqe->dma.inline_data; 698 699 sge = ibwr->sg_list; 700 for (i = 0; i < num_sge; i++, sge++) { 701 memcpy(p, (void *)(uintptr_t)sge->addr, 702 sge->length); 703 704 p += sge->length; 705 } 706 } else if (mask & WR_REG_MASK) { 707 wqe->mask = mask; 708 wqe->state = wqe_state_posted; 709 return 0; 710 } else 711 memcpy(wqe->dma.sge, ibwr->sg_list, 712 num_sge * sizeof(struct ib_sge)); 713 714 wqe->iova = (mask & WR_ATOMIC_MASK) ? 715 atomic_wr(ibwr)->remote_addr : 716 rdma_wr(ibwr)->remote_addr; 717 wqe->mask = mask; 718 wqe->dma.length = length; 719 wqe->dma.resid = length; 720 wqe->dma.num_sge = num_sge; 721 wqe->dma.cur_sge = 0; 722 wqe->dma.sge_offset = 0; 723 wqe->state = wqe_state_posted; 724 wqe->ssn = atomic_add_return(1, &qp->ssn); 725 726 return 0; 727 } 728 729 static int post_one_send(struct rxe_qp *qp, struct ib_send_wr *ibwr, 730 unsigned int mask, u32 length) 731 { 732 int err; 733 struct rxe_sq *sq = &qp->sq; 734 struct rxe_send_wqe *send_wqe; 735 unsigned long flags; 736 737 err = validate_send_wr(qp, ibwr, mask, length); 738 if (err) 739 return err; 740 741 spin_lock_irqsave(&qp->sq.sq_lock, flags); 742 743 if (unlikely(queue_full(sq->queue))) { 744 err = -ENOMEM; 745 goto err1; 746 } 747 748 send_wqe = producer_addr(sq->queue); 749 750 err = init_send_wqe(qp, ibwr, mask, length, send_wqe); 751 if (unlikely(err)) 752 goto err1; 753 754 /* 755 * make sure all changes to the work queue are 756 * written before we update the producer pointer 757 */ 758 smp_wmb(); 759 760 advance_producer(sq->queue); 761 spin_unlock_irqrestore(&qp->sq.sq_lock, flags); 762 763 return 0; 764 765 err1: 766 spin_unlock_irqrestore(&qp->sq.sq_lock, flags); 767 return err; 768 } 769 770 static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr, 771 struct ib_send_wr **bad_wr) 772 { 773 int err = 0; 774 unsigned int mask; 775 unsigned int length = 0; 776 int i; 777 int must_sched; 778 779 while (wr) { 780 mask = wr_opcode_mask(wr->opcode, qp); 781 if (unlikely(!mask)) { 782 err = -EINVAL; 783 *bad_wr = wr; 784 break; 785 } 786 787 if (unlikely((wr->send_flags & IB_SEND_INLINE) && 788 !(mask & WR_INLINE_MASK))) { 789 err = -EINVAL; 790 *bad_wr = wr; 791 break; 792 } 793 794 length = 0; 795 for (i = 0; i < wr->num_sge; i++) 796 length += wr->sg_list[i].length; 797 798 err = post_one_send(qp, wr, mask, length); 799 800 if (err) { 801 *bad_wr = wr; 802 break; 803 } 804 wr = wr->next; 805 } 806 807 /* 808 * Must sched in case of GSI QP because ib_send_mad() hold irq lock, 809 * and the requester call ip_local_out_sk() that takes spin_lock_bh. 810 */ 811 must_sched = (qp_type(qp) == IB_QPT_GSI) || 812 (queue_count(qp->sq.queue) > 1); 813 814 rxe_run_task(&qp->req.task, must_sched); 815 if (unlikely(qp->req.state == QP_STATE_ERROR)) 816 rxe_run_task(&qp->comp.task, 1); 817 818 return err; 819 } 820 821 static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, 822 struct ib_send_wr **bad_wr) 823 { 824 struct rxe_qp *qp = to_rqp(ibqp); 825 826 if (unlikely(!qp->valid)) { 827 *bad_wr = wr; 828 return -EINVAL; 829 } 830 831 if (unlikely(qp->req.state < QP_STATE_READY)) { 832 *bad_wr = wr; 833 return -EINVAL; 834 } 835 836 if (qp->is_user) { 837 /* Utilize process context to do protocol processing */ 838 rxe_run_task(&qp->req.task, 0); 839 return 0; 840 } else 841 return rxe_post_send_kernel(qp, wr, bad_wr); 842 } 843 844 static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, 845 struct ib_recv_wr **bad_wr) 846 { 847 int err = 0; 848 struct rxe_qp *qp = to_rqp(ibqp); 849 struct rxe_rq *rq = &qp->rq; 850 unsigned long flags; 851 852 if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) { 853 *bad_wr = wr; 854 err = -EINVAL; 855 goto err1; 856 } 857 858 if (unlikely(qp->srq)) { 859 *bad_wr = wr; 860 err = -EINVAL; 861 goto err1; 862 } 863 864 spin_lock_irqsave(&rq->producer_lock, flags); 865 866 while (wr) { 867 err = post_one_recv(rq, wr); 868 if (unlikely(err)) { 869 *bad_wr = wr; 870 break; 871 } 872 wr = wr->next; 873 } 874 875 spin_unlock_irqrestore(&rq->producer_lock, flags); 876 877 if (qp->resp.state == QP_STATE_ERROR) 878 rxe_run_task(&qp->resp.task, 1); 879 880 err1: 881 return err; 882 } 883 884 static struct ib_cq *rxe_create_cq(struct ib_device *dev, 885 const struct ib_cq_init_attr *attr, 886 struct ib_ucontext *context, 887 struct ib_udata *udata) 888 { 889 int err; 890 struct rxe_dev *rxe = to_rdev(dev); 891 struct rxe_cq *cq; 892 893 if (attr->flags) 894 return ERR_PTR(-EINVAL); 895 896 err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector, udata); 897 if (err) 898 goto err1; 899 900 cq = rxe_alloc(&rxe->cq_pool); 901 if (!cq) { 902 err = -ENOMEM; 903 goto err1; 904 } 905 906 err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector, 907 context, udata); 908 if (err) 909 goto err2; 910 911 return &cq->ibcq; 912 913 err2: 914 rxe_drop_ref(cq); 915 err1: 916 return ERR_PTR(err); 917 } 918 919 static int rxe_destroy_cq(struct ib_cq *ibcq) 920 { 921 struct rxe_cq *cq = to_rcq(ibcq); 922 923 rxe_cq_disable(cq); 924 925 rxe_drop_ref(cq); 926 return 0; 927 } 928 929 static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata) 930 { 931 int err; 932 struct rxe_cq *cq = to_rcq(ibcq); 933 struct rxe_dev *rxe = to_rdev(ibcq->device); 934 935 err = rxe_cq_chk_attr(rxe, cq, cqe, 0, udata); 936 if (err) 937 goto err1; 938 939 err = rxe_cq_resize_queue(cq, cqe, udata); 940 if (err) 941 goto err1; 942 943 return 0; 944 945 err1: 946 return err; 947 } 948 949 static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) 950 { 951 int i; 952 struct rxe_cq *cq = to_rcq(ibcq); 953 struct rxe_cqe *cqe; 954 unsigned long flags; 955 956 spin_lock_irqsave(&cq->cq_lock, flags); 957 for (i = 0; i < num_entries; i++) { 958 cqe = queue_head(cq->queue); 959 if (!cqe) 960 break; 961 962 memcpy(wc++, &cqe->ibwc, sizeof(*wc)); 963 advance_consumer(cq->queue); 964 } 965 spin_unlock_irqrestore(&cq->cq_lock, flags); 966 967 return i; 968 } 969 970 static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt) 971 { 972 struct rxe_cq *cq = to_rcq(ibcq); 973 int count = queue_count(cq->queue); 974 975 return (count > wc_cnt) ? wc_cnt : count; 976 } 977 978 static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) 979 { 980 struct rxe_cq *cq = to_rcq(ibcq); 981 unsigned long irq_flags; 982 int ret = 0; 983 984 spin_lock_irqsave(&cq->cq_lock, irq_flags); 985 if (cq->notify != IB_CQ_NEXT_COMP) 986 cq->notify = flags & IB_CQ_SOLICITED_MASK; 987 988 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !queue_empty(cq->queue)) 989 ret = 1; 990 991 spin_unlock_irqrestore(&cq->cq_lock, irq_flags); 992 993 return ret; 994 } 995 996 static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access) 997 { 998 struct rxe_dev *rxe = to_rdev(ibpd->device); 999 struct rxe_pd *pd = to_rpd(ibpd); 1000 struct rxe_mem *mr; 1001 int err; 1002 1003 mr = rxe_alloc(&rxe->mr_pool); 1004 if (!mr) { 1005 err = -ENOMEM; 1006 goto err1; 1007 } 1008 1009 rxe_add_index(mr); 1010 1011 rxe_add_ref(pd); 1012 1013 err = rxe_mem_init_dma(rxe, pd, access, mr); 1014 if (err) 1015 goto err2; 1016 1017 return &mr->ibmr; 1018 1019 err2: 1020 rxe_drop_ref(pd); 1021 rxe_drop_index(mr); 1022 rxe_drop_ref(mr); 1023 err1: 1024 return ERR_PTR(err); 1025 } 1026 1027 static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd, 1028 u64 start, 1029 u64 length, 1030 u64 iova, 1031 int access, struct ib_udata *udata) 1032 { 1033 int err; 1034 struct rxe_dev *rxe = to_rdev(ibpd->device); 1035 struct rxe_pd *pd = to_rpd(ibpd); 1036 struct rxe_mem *mr; 1037 1038 mr = rxe_alloc(&rxe->mr_pool); 1039 if (!mr) { 1040 err = -ENOMEM; 1041 goto err2; 1042 } 1043 1044 rxe_add_index(mr); 1045 1046 rxe_add_ref(pd); 1047 1048 err = rxe_mem_init_user(rxe, pd, start, length, iova, 1049 access, udata, mr); 1050 if (err) 1051 goto err3; 1052 1053 return &mr->ibmr; 1054 1055 err3: 1056 rxe_drop_ref(pd); 1057 rxe_drop_index(mr); 1058 rxe_drop_ref(mr); 1059 err2: 1060 return ERR_PTR(err); 1061 } 1062 1063 static int rxe_dereg_mr(struct ib_mr *ibmr) 1064 { 1065 struct rxe_mem *mr = to_rmr(ibmr); 1066 1067 mr->state = RXE_MEM_STATE_ZOMBIE; 1068 rxe_drop_ref(mr->pd); 1069 rxe_drop_index(mr); 1070 rxe_drop_ref(mr); 1071 return 0; 1072 } 1073 1074 static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, 1075 enum ib_mr_type mr_type, 1076 u32 max_num_sg) 1077 { 1078 struct rxe_dev *rxe = to_rdev(ibpd->device); 1079 struct rxe_pd *pd = to_rpd(ibpd); 1080 struct rxe_mem *mr; 1081 int err; 1082 1083 if (mr_type != IB_MR_TYPE_MEM_REG) 1084 return ERR_PTR(-EINVAL); 1085 1086 mr = rxe_alloc(&rxe->mr_pool); 1087 if (!mr) { 1088 err = -ENOMEM; 1089 goto err1; 1090 } 1091 1092 rxe_add_index(mr); 1093 1094 rxe_add_ref(pd); 1095 1096 err = rxe_mem_init_fast(rxe, pd, max_num_sg, mr); 1097 if (err) 1098 goto err2; 1099 1100 return &mr->ibmr; 1101 1102 err2: 1103 rxe_drop_ref(pd); 1104 rxe_drop_index(mr); 1105 rxe_drop_ref(mr); 1106 err1: 1107 return ERR_PTR(err); 1108 } 1109 1110 static int rxe_set_page(struct ib_mr *ibmr, u64 addr) 1111 { 1112 struct rxe_mem *mr = to_rmr(ibmr); 1113 struct rxe_map *map; 1114 struct rxe_phys_buf *buf; 1115 1116 if (unlikely(mr->nbuf == mr->num_buf)) 1117 return -ENOMEM; 1118 1119 map = mr->map[mr->nbuf / RXE_BUF_PER_MAP]; 1120 buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP]; 1121 1122 buf->addr = addr; 1123 buf->size = ibmr->page_size; 1124 mr->nbuf++; 1125 1126 return 0; 1127 } 1128 1129 static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, 1130 int sg_nents, unsigned int *sg_offset) 1131 { 1132 struct rxe_mem *mr = to_rmr(ibmr); 1133 int n; 1134 1135 mr->nbuf = 0; 1136 1137 n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page); 1138 1139 mr->va = ibmr->iova; 1140 mr->iova = ibmr->iova; 1141 mr->length = ibmr->length; 1142 mr->page_shift = ilog2(ibmr->page_size); 1143 mr->page_mask = ibmr->page_size - 1; 1144 mr->offset = mr->iova & mr->page_mask; 1145 1146 return n; 1147 } 1148 1149 static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid) 1150 { 1151 int err; 1152 struct rxe_dev *rxe = to_rdev(ibqp->device); 1153 struct rxe_qp *qp = to_rqp(ibqp); 1154 struct rxe_mc_grp *grp; 1155 1156 /* takes a ref on grp if successful */ 1157 err = rxe_mcast_get_grp(rxe, mgid, &grp); 1158 if (err) 1159 return err; 1160 1161 err = rxe_mcast_add_grp_elem(rxe, qp, grp); 1162 1163 rxe_drop_ref(grp); 1164 return err; 1165 } 1166 1167 static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid) 1168 { 1169 struct rxe_dev *rxe = to_rdev(ibqp->device); 1170 struct rxe_qp *qp = to_rqp(ibqp); 1171 1172 return rxe_mcast_drop_grp_elem(rxe, qp, mgid); 1173 } 1174 1175 static ssize_t parent_show(struct device *device, 1176 struct device_attribute *attr, char *buf) 1177 { 1178 struct rxe_dev *rxe = container_of(device, struct rxe_dev, 1179 ib_dev.dev); 1180 1181 return snprintf(buf, 16, "%s\n", rxe_parent_name(rxe, 1)); 1182 } 1183 1184 static DEVICE_ATTR_RO(parent); 1185 1186 static struct device_attribute *rxe_dev_attributes[] = { 1187 &dev_attr_parent, 1188 }; 1189 1190 int rxe_register_device(struct rxe_dev *rxe) 1191 { 1192 int err; 1193 int i; 1194 struct ib_device *dev = &rxe->ib_dev; 1195 struct crypto_shash *tfm; 1196 1197 strlcpy(dev->name, "rxe%d", IB_DEVICE_NAME_MAX); 1198 strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc)); 1199 1200 dev->owner = THIS_MODULE; 1201 dev->node_type = RDMA_NODE_IB_CA; 1202 dev->phys_port_cnt = 1; 1203 dev->num_comp_vectors = num_possible_cpus(); 1204 dev->dev.parent = rxe_dma_device(rxe); 1205 dev->local_dma_lkey = 0; 1206 addrconf_addr_eui48((unsigned char *)&dev->node_guid, 1207 rxe->ndev->dev_addr); 1208 dev->dev.dma_ops = &dma_virt_ops; 1209 dma_coerce_mask_and_coherent(&dev->dev, 1210 dma_get_required_mask(dev->dev.parent)); 1211 1212 dev->uverbs_abi_ver = RXE_UVERBS_ABI_VERSION; 1213 dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT) 1214 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) 1215 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE) 1216 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT) 1217 | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD) 1218 | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD) 1219 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ) 1220 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ) 1221 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ) 1222 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ) 1223 | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV) 1224 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP) 1225 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP) 1226 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP) 1227 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP) 1228 | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND) 1229 | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV) 1230 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ) 1231 | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ) 1232 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ) 1233 | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ) 1234 | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ) 1235 | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) 1236 | BIT_ULL(IB_USER_VERBS_CMD_REG_MR) 1237 | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR) 1238 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH) 1239 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH) 1240 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH) 1241 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH) 1242 | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST) 1243 | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST) 1244 ; 1245 1246 dev->query_device = rxe_query_device; 1247 dev->modify_device = rxe_modify_device; 1248 dev->query_port = rxe_query_port; 1249 dev->modify_port = rxe_modify_port; 1250 dev->get_link_layer = rxe_get_link_layer; 1251 dev->query_gid = rxe_query_gid; 1252 dev->get_netdev = rxe_get_netdev; 1253 dev->add_gid = rxe_add_gid; 1254 dev->del_gid = rxe_del_gid; 1255 dev->query_pkey = rxe_query_pkey; 1256 dev->alloc_ucontext = rxe_alloc_ucontext; 1257 dev->dealloc_ucontext = rxe_dealloc_ucontext; 1258 dev->mmap = rxe_mmap; 1259 dev->get_port_immutable = rxe_port_immutable; 1260 dev->alloc_pd = rxe_alloc_pd; 1261 dev->dealloc_pd = rxe_dealloc_pd; 1262 dev->create_ah = rxe_create_ah; 1263 dev->modify_ah = rxe_modify_ah; 1264 dev->query_ah = rxe_query_ah; 1265 dev->destroy_ah = rxe_destroy_ah; 1266 dev->create_srq = rxe_create_srq; 1267 dev->modify_srq = rxe_modify_srq; 1268 dev->query_srq = rxe_query_srq; 1269 dev->destroy_srq = rxe_destroy_srq; 1270 dev->post_srq_recv = rxe_post_srq_recv; 1271 dev->create_qp = rxe_create_qp; 1272 dev->modify_qp = rxe_modify_qp; 1273 dev->query_qp = rxe_query_qp; 1274 dev->destroy_qp = rxe_destroy_qp; 1275 dev->post_send = rxe_post_send; 1276 dev->post_recv = rxe_post_recv; 1277 dev->create_cq = rxe_create_cq; 1278 dev->destroy_cq = rxe_destroy_cq; 1279 dev->resize_cq = rxe_resize_cq; 1280 dev->poll_cq = rxe_poll_cq; 1281 dev->peek_cq = rxe_peek_cq; 1282 dev->req_notify_cq = rxe_req_notify_cq; 1283 dev->get_dma_mr = rxe_get_dma_mr; 1284 dev->reg_user_mr = rxe_reg_user_mr; 1285 dev->dereg_mr = rxe_dereg_mr; 1286 dev->alloc_mr = rxe_alloc_mr; 1287 dev->map_mr_sg = rxe_map_mr_sg; 1288 dev->attach_mcast = rxe_attach_mcast; 1289 dev->detach_mcast = rxe_detach_mcast; 1290 dev->get_hw_stats = rxe_ib_get_hw_stats; 1291 dev->alloc_hw_stats = rxe_ib_alloc_hw_stats; 1292 1293 tfm = crypto_alloc_shash("crc32", 0, 0); 1294 if (IS_ERR(tfm)) { 1295 pr_err("failed to allocate crc algorithm err:%ld\n", 1296 PTR_ERR(tfm)); 1297 return PTR_ERR(tfm); 1298 } 1299 rxe->tfm = tfm; 1300 1301 err = ib_register_device(dev, NULL); 1302 if (err) { 1303 pr_warn("%s failed with error %d\n", __func__, err); 1304 goto err1; 1305 } 1306 1307 for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) { 1308 err = device_create_file(&dev->dev, rxe_dev_attributes[i]); 1309 if (err) { 1310 pr_warn("%s failed with error %d for attr number %d\n", 1311 __func__, err, i); 1312 goto err2; 1313 } 1314 } 1315 1316 return 0; 1317 1318 err2: 1319 ib_unregister_device(dev); 1320 err1: 1321 crypto_free_shash(rxe->tfm); 1322 1323 return err; 1324 } 1325 1326 int rxe_unregister_device(struct rxe_dev *rxe) 1327 { 1328 int i; 1329 struct ib_device *dev = &rxe->ib_dev; 1330 1331 for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) 1332 device_remove_file(&dev->dev, rxe_dev_attributes[i]); 1333 1334 ib_unregister_device(dev); 1335 1336 return 0; 1337 } 1338