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