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 <rdma/uverbs_ioctl.h> 37 #include "rxe.h" 38 #include "rxe_loc.h" 39 #include "rxe_queue.h" 40 #include "rxe_hw_counters.h" 41 42 static int rxe_query_device(struct ib_device *dev, 43 struct ib_device_attr *attr, 44 struct ib_udata *uhw) 45 { 46 struct rxe_dev *rxe = to_rdev(dev); 47 48 if (uhw->inlen || uhw->outlen) 49 return -EINVAL; 50 51 *attr = rxe->attr; 52 return 0; 53 } 54 55 static int rxe_query_port(struct ib_device *dev, 56 u8 port_num, struct ib_port_attr *attr) 57 { 58 struct rxe_dev *rxe = to_rdev(dev); 59 struct rxe_port *port; 60 int rc; 61 62 port = &rxe->port; 63 64 /* *attr being zeroed by the caller, avoid zeroing it here */ 65 *attr = port->attr; 66 67 mutex_lock(&rxe->usdev_lock); 68 rc = ib_get_eth_speed(dev, port_num, &attr->active_speed, 69 &attr->active_width); 70 71 if (attr->state == IB_PORT_ACTIVE) 72 attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP; 73 else if (dev_get_flags(rxe->ndev) & IFF_UP) 74 attr->phys_state = IB_PORT_PHYS_STATE_POLLING; 75 else 76 attr->phys_state = IB_PORT_PHYS_STATE_DISABLED; 77 78 mutex_unlock(&rxe->usdev_lock); 79 80 return rc; 81 } 82 83 static int rxe_query_pkey(struct ib_device *device, 84 u8 port_num, u16 index, u16 *pkey) 85 { 86 struct rxe_dev *rxe = to_rdev(device); 87 struct rxe_port *port; 88 89 port = &rxe->port; 90 91 if (unlikely(index >= port->attr.pkey_tbl_len)) { 92 dev_warn(device->dev.parent, "invalid index = %d\n", 93 index); 94 goto err1; 95 } 96 97 *pkey = port->pkey_tbl[index]; 98 return 0; 99 100 err1: 101 return -EINVAL; 102 } 103 104 static int rxe_modify_device(struct ib_device *dev, 105 int mask, struct ib_device_modify *attr) 106 { 107 struct rxe_dev *rxe = to_rdev(dev); 108 109 if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID | 110 IB_DEVICE_MODIFY_NODE_DESC)) 111 return -EOPNOTSUPP; 112 113 if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) 114 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid); 115 116 if (mask & IB_DEVICE_MODIFY_NODE_DESC) { 117 memcpy(rxe->ib_dev.node_desc, 118 attr->node_desc, sizeof(rxe->ib_dev.node_desc)); 119 } 120 121 return 0; 122 } 123 124 static int rxe_modify_port(struct ib_device *dev, 125 u8 port_num, int mask, struct ib_port_modify *attr) 126 { 127 struct rxe_dev *rxe = to_rdev(dev); 128 struct rxe_port *port; 129 130 port = &rxe->port; 131 132 port->attr.port_cap_flags |= attr->set_port_cap_mask; 133 port->attr.port_cap_flags &= ~attr->clr_port_cap_mask; 134 135 if (mask & IB_PORT_RESET_QKEY_CNTR) 136 port->attr.qkey_viol_cntr = 0; 137 138 return 0; 139 } 140 141 static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev, 142 u8 port_num) 143 { 144 struct rxe_dev *rxe = to_rdev(dev); 145 146 return rxe_link_layer(rxe, port_num); 147 } 148 149 static int rxe_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata) 150 { 151 struct rxe_dev *rxe = to_rdev(uctx->device); 152 struct rxe_ucontext *uc = to_ruc(uctx); 153 154 return rxe_add_to_pool(&rxe->uc_pool, &uc->pelem); 155 } 156 157 static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc) 158 { 159 struct rxe_ucontext *uc = to_ruc(ibuc); 160 161 rxe_drop_ref(uc); 162 } 163 164 static int rxe_port_immutable(struct ib_device *dev, u8 port_num, 165 struct ib_port_immutable *immutable) 166 { 167 int err; 168 struct ib_port_attr attr; 169 170 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP; 171 172 err = ib_query_port(dev, port_num, &attr); 173 if (err) 174 return err; 175 176 immutable->pkey_tbl_len = attr.pkey_tbl_len; 177 immutable->gid_tbl_len = attr.gid_tbl_len; 178 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 179 180 return 0; 181 } 182 183 static int rxe_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 184 { 185 struct rxe_dev *rxe = to_rdev(ibpd->device); 186 struct rxe_pd *pd = to_rpd(ibpd); 187 188 return rxe_add_to_pool(&rxe->pd_pool, &pd->pelem); 189 } 190 191 static void rxe_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 192 { 193 struct rxe_pd *pd = to_rpd(ibpd); 194 195 rxe_drop_ref(pd); 196 } 197 198 static int rxe_create_ah(struct ib_ah *ibah, 199 struct rdma_ah_init_attr *init_attr, 200 struct ib_udata *udata) 201 202 { 203 int err; 204 struct rxe_dev *rxe = to_rdev(ibah->device); 205 struct rxe_ah *ah = to_rah(ibah); 206 207 err = rxe_av_chk_attr(rxe, init_attr->ah_attr); 208 if (err) 209 return err; 210 211 err = rxe_add_to_pool(&rxe->ah_pool, &ah->pelem); 212 if (err) 213 return err; 214 215 rxe_init_av(init_attr->ah_attr, &ah->av); 216 return 0; 217 } 218 219 static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) 220 { 221 int err; 222 struct rxe_dev *rxe = to_rdev(ibah->device); 223 struct rxe_ah *ah = to_rah(ibah); 224 225 err = rxe_av_chk_attr(rxe, attr); 226 if (err) 227 return err; 228 229 rxe_init_av(attr, &ah->av); 230 return 0; 231 } 232 233 static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) 234 { 235 struct rxe_ah *ah = to_rah(ibah); 236 237 memset(attr, 0, sizeof(*attr)); 238 attr->type = ibah->type; 239 rxe_av_to_attr(&ah->av, attr); 240 return 0; 241 } 242 243 static void rxe_destroy_ah(struct ib_ah *ibah, u32 flags) 244 { 245 struct rxe_ah *ah = to_rah(ibah); 246 247 rxe_drop_ref(ah); 248 } 249 250 static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr) 251 { 252 int err; 253 int i; 254 u32 length; 255 struct rxe_recv_wqe *recv_wqe; 256 int num_sge = ibwr->num_sge; 257 258 if (unlikely(queue_full(rq->queue))) { 259 err = -ENOMEM; 260 goto err1; 261 } 262 263 if (unlikely(num_sge > rq->max_sge)) { 264 err = -EINVAL; 265 goto err1; 266 } 267 268 length = 0; 269 for (i = 0; i < num_sge; i++) 270 length += ibwr->sg_list[i].length; 271 272 recv_wqe = producer_addr(rq->queue); 273 recv_wqe->wr_id = ibwr->wr_id; 274 recv_wqe->num_sge = num_sge; 275 276 memcpy(recv_wqe->dma.sge, ibwr->sg_list, 277 num_sge * sizeof(struct ib_sge)); 278 279 recv_wqe->dma.length = length; 280 recv_wqe->dma.resid = length; 281 recv_wqe->dma.num_sge = num_sge; 282 recv_wqe->dma.cur_sge = 0; 283 recv_wqe->dma.sge_offset = 0; 284 285 /* make sure all changes to the work queue are written before we 286 * update the producer pointer 287 */ 288 smp_wmb(); 289 290 advance_producer(rq->queue); 291 return 0; 292 293 err1: 294 return err; 295 } 296 297 static int rxe_create_srq(struct ib_srq *ibsrq, struct ib_srq_init_attr *init, 298 struct ib_udata *udata) 299 { 300 int err; 301 struct rxe_dev *rxe = to_rdev(ibsrq->device); 302 struct rxe_pd *pd = to_rpd(ibsrq->pd); 303 struct rxe_srq *srq = to_rsrq(ibsrq); 304 struct rxe_create_srq_resp __user *uresp = NULL; 305 306 if (udata) { 307 if (udata->outlen < sizeof(*uresp)) 308 return -EINVAL; 309 uresp = udata->outbuf; 310 } 311 312 err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK); 313 if (err) 314 goto err1; 315 316 err = rxe_add_to_pool(&rxe->srq_pool, &srq->pelem); 317 if (err) 318 goto err1; 319 320 rxe_add_ref(pd); 321 srq->pd = pd; 322 323 err = rxe_srq_from_init(rxe, srq, init, udata, uresp); 324 if (err) 325 goto err2; 326 327 return 0; 328 329 err2: 330 rxe_drop_ref(pd); 331 rxe_drop_ref(srq); 332 err1: 333 return err; 334 } 335 336 static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, 337 enum ib_srq_attr_mask mask, 338 struct ib_udata *udata) 339 { 340 int err; 341 struct rxe_srq *srq = to_rsrq(ibsrq); 342 struct rxe_dev *rxe = to_rdev(ibsrq->device); 343 struct rxe_modify_srq_cmd ucmd = {}; 344 345 if (udata) { 346 if (udata->inlen < sizeof(ucmd)) 347 return -EINVAL; 348 349 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)); 350 if (err) 351 return err; 352 } 353 354 err = rxe_srq_chk_attr(rxe, srq, attr, mask); 355 if (err) 356 goto err1; 357 358 err = rxe_srq_from_attr(rxe, srq, attr, mask, &ucmd, udata); 359 if (err) 360 goto err1; 361 362 return 0; 363 364 err1: 365 return err; 366 } 367 368 static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr) 369 { 370 struct rxe_srq *srq = to_rsrq(ibsrq); 371 372 if (srq->error) 373 return -EINVAL; 374 375 attr->max_wr = srq->rq.queue->buf->index_mask; 376 attr->max_sge = srq->rq.max_sge; 377 attr->srq_limit = srq->limit; 378 return 0; 379 } 380 381 static void rxe_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata) 382 { 383 struct rxe_srq *srq = to_rsrq(ibsrq); 384 385 if (srq->rq.queue) 386 rxe_queue_cleanup(srq->rq.queue); 387 388 rxe_drop_ref(srq->pd); 389 rxe_drop_ref(srq); 390 } 391 392 static int rxe_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, 393 const struct ib_recv_wr **bad_wr) 394 { 395 int err = 0; 396 unsigned long flags; 397 struct rxe_srq *srq = to_rsrq(ibsrq); 398 399 spin_lock_irqsave(&srq->rq.producer_lock, flags); 400 401 while (wr) { 402 err = post_one_recv(&srq->rq, wr); 403 if (unlikely(err)) 404 break; 405 wr = wr->next; 406 } 407 408 spin_unlock_irqrestore(&srq->rq.producer_lock, flags); 409 410 if (err) 411 *bad_wr = wr; 412 413 return err; 414 } 415 416 static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd, 417 struct ib_qp_init_attr *init, 418 struct ib_udata *udata) 419 { 420 int err; 421 struct rxe_dev *rxe = to_rdev(ibpd->device); 422 struct rxe_pd *pd = to_rpd(ibpd); 423 struct rxe_qp *qp; 424 struct rxe_create_qp_resp __user *uresp = NULL; 425 426 if (udata) { 427 if (udata->outlen < sizeof(*uresp)) 428 return ERR_PTR(-EINVAL); 429 uresp = udata->outbuf; 430 } 431 432 err = rxe_qp_chk_init(rxe, init); 433 if (err) 434 goto err1; 435 436 qp = rxe_alloc(&rxe->qp_pool); 437 if (!qp) { 438 err = -ENOMEM; 439 goto err1; 440 } 441 442 if (udata) { 443 if (udata->inlen) { 444 err = -EINVAL; 445 goto err2; 446 } 447 qp->is_user = 1; 448 } 449 450 rxe_add_index(qp); 451 452 err = rxe_qp_from_init(rxe, qp, pd, init, uresp, ibpd, udata); 453 if (err) 454 goto err3; 455 456 return &qp->ibqp; 457 458 err3: 459 rxe_drop_index(qp); 460 err2: 461 rxe_drop_ref(qp); 462 err1: 463 return ERR_PTR(err); 464 } 465 466 static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 467 int mask, struct ib_udata *udata) 468 { 469 int err; 470 struct rxe_dev *rxe = to_rdev(ibqp->device); 471 struct rxe_qp *qp = to_rqp(ibqp); 472 473 err = rxe_qp_chk_attr(rxe, qp, attr, mask); 474 if (err) 475 goto err1; 476 477 err = rxe_qp_from_attr(qp, attr, mask, udata); 478 if (err) 479 goto err1; 480 481 return 0; 482 483 err1: 484 return err; 485 } 486 487 static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 488 int mask, struct ib_qp_init_attr *init) 489 { 490 struct rxe_qp *qp = to_rqp(ibqp); 491 492 rxe_qp_to_init(qp, init); 493 rxe_qp_to_attr(qp, attr, mask); 494 495 return 0; 496 } 497 498 static int rxe_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) 499 { 500 struct rxe_qp *qp = to_rqp(ibqp); 501 502 rxe_qp_destroy(qp); 503 rxe_drop_index(qp); 504 rxe_drop_ref(qp); 505 return 0; 506 } 507 508 static int validate_send_wr(struct rxe_qp *qp, const struct ib_send_wr *ibwr, 509 unsigned int mask, unsigned int length) 510 { 511 int num_sge = ibwr->num_sge; 512 struct rxe_sq *sq = &qp->sq; 513 514 if (unlikely(num_sge > sq->max_sge)) 515 goto err1; 516 517 if (unlikely(mask & WR_ATOMIC_MASK)) { 518 if (length < 8) 519 goto err1; 520 521 if (atomic_wr(ibwr)->remote_addr & 0x7) 522 goto err1; 523 } 524 525 if (unlikely((ibwr->send_flags & IB_SEND_INLINE) && 526 (length > sq->max_inline))) 527 goto err1; 528 529 return 0; 530 531 err1: 532 return -EINVAL; 533 } 534 535 static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr, 536 const struct ib_send_wr *ibwr) 537 { 538 wr->wr_id = ibwr->wr_id; 539 wr->num_sge = ibwr->num_sge; 540 wr->opcode = ibwr->opcode; 541 wr->send_flags = ibwr->send_flags; 542 543 if (qp_type(qp) == IB_QPT_UD || 544 qp_type(qp) == IB_QPT_SMI || 545 qp_type(qp) == IB_QPT_GSI) { 546 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn; 547 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey; 548 if (qp_type(qp) == IB_QPT_GSI) 549 wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index; 550 if (wr->opcode == IB_WR_SEND_WITH_IMM) 551 wr->ex.imm_data = ibwr->ex.imm_data; 552 } else { 553 switch (wr->opcode) { 554 case IB_WR_RDMA_WRITE_WITH_IMM: 555 wr->ex.imm_data = ibwr->ex.imm_data; 556 /* fall through */ 557 case IB_WR_RDMA_READ: 558 case IB_WR_RDMA_WRITE: 559 wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr; 560 wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey; 561 break; 562 case IB_WR_SEND_WITH_IMM: 563 wr->ex.imm_data = ibwr->ex.imm_data; 564 break; 565 case IB_WR_SEND_WITH_INV: 566 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; 567 break; 568 case IB_WR_ATOMIC_CMP_AND_SWP: 569 case IB_WR_ATOMIC_FETCH_AND_ADD: 570 wr->wr.atomic.remote_addr = 571 atomic_wr(ibwr)->remote_addr; 572 wr->wr.atomic.compare_add = 573 atomic_wr(ibwr)->compare_add; 574 wr->wr.atomic.swap = atomic_wr(ibwr)->swap; 575 wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey; 576 break; 577 case IB_WR_LOCAL_INV: 578 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; 579 break; 580 case IB_WR_REG_MR: 581 wr->wr.reg.mr = reg_wr(ibwr)->mr; 582 wr->wr.reg.key = reg_wr(ibwr)->key; 583 wr->wr.reg.access = reg_wr(ibwr)->access; 584 break; 585 default: 586 break; 587 } 588 } 589 } 590 591 static int init_send_wqe(struct rxe_qp *qp, const struct ib_send_wr *ibwr, 592 unsigned int mask, unsigned int length, 593 struct rxe_send_wqe *wqe) 594 { 595 int num_sge = ibwr->num_sge; 596 struct ib_sge *sge; 597 int i; 598 u8 *p; 599 600 init_send_wr(qp, &wqe->wr, ibwr); 601 602 if (qp_type(qp) == IB_QPT_UD || 603 qp_type(qp) == IB_QPT_SMI || 604 qp_type(qp) == IB_QPT_GSI) 605 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av)); 606 607 if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) { 608 p = wqe->dma.inline_data; 609 610 sge = ibwr->sg_list; 611 for (i = 0; i < num_sge; i++, sge++) { 612 memcpy(p, (void *)(uintptr_t)sge->addr, 613 sge->length); 614 615 p += sge->length; 616 } 617 } else if (mask & WR_REG_MASK) { 618 wqe->mask = mask; 619 wqe->state = wqe_state_posted; 620 return 0; 621 } else 622 memcpy(wqe->dma.sge, ibwr->sg_list, 623 num_sge * sizeof(struct ib_sge)); 624 625 wqe->iova = mask & WR_ATOMIC_MASK ? atomic_wr(ibwr)->remote_addr : 626 mask & WR_READ_OR_WRITE_MASK ? rdma_wr(ibwr)->remote_addr : 0; 627 wqe->mask = mask; 628 wqe->dma.length = length; 629 wqe->dma.resid = length; 630 wqe->dma.num_sge = num_sge; 631 wqe->dma.cur_sge = 0; 632 wqe->dma.sge_offset = 0; 633 wqe->state = wqe_state_posted; 634 wqe->ssn = atomic_add_return(1, &qp->ssn); 635 636 return 0; 637 } 638 639 static int post_one_send(struct rxe_qp *qp, const struct ib_send_wr *ibwr, 640 unsigned int mask, u32 length) 641 { 642 int err; 643 struct rxe_sq *sq = &qp->sq; 644 struct rxe_send_wqe *send_wqe; 645 unsigned long flags; 646 647 err = validate_send_wr(qp, ibwr, mask, length); 648 if (err) 649 return err; 650 651 spin_lock_irqsave(&qp->sq.sq_lock, flags); 652 653 if (unlikely(queue_full(sq->queue))) { 654 err = -ENOMEM; 655 goto err1; 656 } 657 658 send_wqe = producer_addr(sq->queue); 659 660 err = init_send_wqe(qp, ibwr, mask, length, send_wqe); 661 if (unlikely(err)) 662 goto err1; 663 664 /* 665 * make sure all changes to the work queue are 666 * written before we update the producer pointer 667 */ 668 smp_wmb(); 669 670 advance_producer(sq->queue); 671 spin_unlock_irqrestore(&qp->sq.sq_lock, flags); 672 673 return 0; 674 675 err1: 676 spin_unlock_irqrestore(&qp->sq.sq_lock, flags); 677 return err; 678 } 679 680 static int rxe_post_send_kernel(struct rxe_qp *qp, const struct ib_send_wr *wr, 681 const struct ib_send_wr **bad_wr) 682 { 683 int err = 0; 684 unsigned int mask; 685 unsigned int length = 0; 686 int i; 687 688 while (wr) { 689 mask = wr_opcode_mask(wr->opcode, qp); 690 if (unlikely(!mask)) { 691 err = -EINVAL; 692 *bad_wr = wr; 693 break; 694 } 695 696 if (unlikely((wr->send_flags & IB_SEND_INLINE) && 697 !(mask & WR_INLINE_MASK))) { 698 err = -EINVAL; 699 *bad_wr = wr; 700 break; 701 } 702 703 length = 0; 704 for (i = 0; i < wr->num_sge; i++) 705 length += wr->sg_list[i].length; 706 707 err = post_one_send(qp, wr, mask, length); 708 709 if (err) { 710 *bad_wr = wr; 711 break; 712 } 713 wr = wr->next; 714 } 715 716 rxe_run_task(&qp->req.task, 1); 717 if (unlikely(qp->req.state == QP_STATE_ERROR)) 718 rxe_run_task(&qp->comp.task, 1); 719 720 return err; 721 } 722 723 static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 724 const struct ib_send_wr **bad_wr) 725 { 726 struct rxe_qp *qp = to_rqp(ibqp); 727 728 if (unlikely(!qp->valid)) { 729 *bad_wr = wr; 730 return -EINVAL; 731 } 732 733 if (unlikely(qp->req.state < QP_STATE_READY)) { 734 *bad_wr = wr; 735 return -EINVAL; 736 } 737 738 if (qp->is_user) { 739 /* Utilize process context to do protocol processing */ 740 rxe_run_task(&qp->req.task, 0); 741 return 0; 742 } else 743 return rxe_post_send_kernel(qp, wr, bad_wr); 744 } 745 746 static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 747 const struct ib_recv_wr **bad_wr) 748 { 749 int err = 0; 750 struct rxe_qp *qp = to_rqp(ibqp); 751 struct rxe_rq *rq = &qp->rq; 752 unsigned long flags; 753 754 if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) { 755 *bad_wr = wr; 756 err = -EINVAL; 757 goto err1; 758 } 759 760 if (unlikely(qp->srq)) { 761 *bad_wr = wr; 762 err = -EINVAL; 763 goto err1; 764 } 765 766 spin_lock_irqsave(&rq->producer_lock, flags); 767 768 while (wr) { 769 err = post_one_recv(rq, wr); 770 if (unlikely(err)) { 771 *bad_wr = wr; 772 break; 773 } 774 wr = wr->next; 775 } 776 777 spin_unlock_irqrestore(&rq->producer_lock, flags); 778 779 if (qp->resp.state == QP_STATE_ERROR) 780 rxe_run_task(&qp->resp.task, 1); 781 782 err1: 783 return err; 784 } 785 786 static int rxe_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, 787 struct ib_udata *udata) 788 { 789 int err; 790 struct ib_device *dev = ibcq->device; 791 struct rxe_dev *rxe = to_rdev(dev); 792 struct rxe_cq *cq = to_rcq(ibcq); 793 struct rxe_create_cq_resp __user *uresp = NULL; 794 795 if (udata) { 796 if (udata->outlen < sizeof(*uresp)) 797 return -EINVAL; 798 uresp = udata->outbuf; 799 } 800 801 if (attr->flags) 802 return -EINVAL; 803 804 err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector); 805 if (err) 806 return err; 807 808 err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector, udata, 809 uresp); 810 if (err) 811 return err; 812 813 return rxe_add_to_pool(&rxe->cq_pool, &cq->pelem); 814 } 815 816 static void rxe_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata) 817 { 818 struct rxe_cq *cq = to_rcq(ibcq); 819 820 rxe_cq_disable(cq); 821 822 rxe_drop_ref(cq); 823 } 824 825 static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata) 826 { 827 int err; 828 struct rxe_cq *cq = to_rcq(ibcq); 829 struct rxe_dev *rxe = to_rdev(ibcq->device); 830 struct rxe_resize_cq_resp __user *uresp = NULL; 831 832 if (udata) { 833 if (udata->outlen < sizeof(*uresp)) 834 return -EINVAL; 835 uresp = udata->outbuf; 836 } 837 838 err = rxe_cq_chk_attr(rxe, cq, cqe, 0); 839 if (err) 840 goto err1; 841 842 err = rxe_cq_resize_queue(cq, cqe, uresp, udata); 843 if (err) 844 goto err1; 845 846 return 0; 847 848 err1: 849 return err; 850 } 851 852 static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) 853 { 854 int i; 855 struct rxe_cq *cq = to_rcq(ibcq); 856 struct rxe_cqe *cqe; 857 unsigned long flags; 858 859 spin_lock_irqsave(&cq->cq_lock, flags); 860 for (i = 0; i < num_entries; i++) { 861 cqe = queue_head(cq->queue); 862 if (!cqe) 863 break; 864 865 memcpy(wc++, &cqe->ibwc, sizeof(*wc)); 866 advance_consumer(cq->queue); 867 } 868 spin_unlock_irqrestore(&cq->cq_lock, flags); 869 870 return i; 871 } 872 873 static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt) 874 { 875 struct rxe_cq *cq = to_rcq(ibcq); 876 int count = queue_count(cq->queue); 877 878 return (count > wc_cnt) ? wc_cnt : count; 879 } 880 881 static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) 882 { 883 struct rxe_cq *cq = to_rcq(ibcq); 884 unsigned long irq_flags; 885 int ret = 0; 886 887 spin_lock_irqsave(&cq->cq_lock, irq_flags); 888 if (cq->notify != IB_CQ_NEXT_COMP) 889 cq->notify = flags & IB_CQ_SOLICITED_MASK; 890 891 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !queue_empty(cq->queue)) 892 ret = 1; 893 894 spin_unlock_irqrestore(&cq->cq_lock, irq_flags); 895 896 return ret; 897 } 898 899 static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access) 900 { 901 struct rxe_dev *rxe = to_rdev(ibpd->device); 902 struct rxe_pd *pd = to_rpd(ibpd); 903 struct rxe_mem *mr; 904 int err; 905 906 mr = rxe_alloc(&rxe->mr_pool); 907 if (!mr) { 908 err = -ENOMEM; 909 goto err1; 910 } 911 912 rxe_add_index(mr); 913 914 rxe_add_ref(pd); 915 916 err = rxe_mem_init_dma(pd, access, mr); 917 if (err) 918 goto err2; 919 920 return &mr->ibmr; 921 922 err2: 923 rxe_drop_ref(pd); 924 rxe_drop_index(mr); 925 rxe_drop_ref(mr); 926 err1: 927 return ERR_PTR(err); 928 } 929 930 static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd, 931 u64 start, 932 u64 length, 933 u64 iova, 934 int access, struct ib_udata *udata) 935 { 936 int err; 937 struct rxe_dev *rxe = to_rdev(ibpd->device); 938 struct rxe_pd *pd = to_rpd(ibpd); 939 struct rxe_mem *mr; 940 941 mr = rxe_alloc(&rxe->mr_pool); 942 if (!mr) { 943 err = -ENOMEM; 944 goto err2; 945 } 946 947 rxe_add_index(mr); 948 949 rxe_add_ref(pd); 950 951 err = rxe_mem_init_user(pd, start, length, iova, 952 access, udata, mr); 953 if (err) 954 goto err3; 955 956 return &mr->ibmr; 957 958 err3: 959 rxe_drop_ref(pd); 960 rxe_drop_index(mr); 961 rxe_drop_ref(mr); 962 err2: 963 return ERR_PTR(err); 964 } 965 966 static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) 967 { 968 struct rxe_mem *mr = to_rmr(ibmr); 969 970 mr->state = RXE_MEM_STATE_ZOMBIE; 971 rxe_drop_ref(mr->pd); 972 rxe_drop_index(mr); 973 rxe_drop_ref(mr); 974 return 0; 975 } 976 977 static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type, 978 u32 max_num_sg, struct ib_udata *udata) 979 { 980 struct rxe_dev *rxe = to_rdev(ibpd->device); 981 struct rxe_pd *pd = to_rpd(ibpd); 982 struct rxe_mem *mr; 983 int err; 984 985 if (mr_type != IB_MR_TYPE_MEM_REG) 986 return ERR_PTR(-EINVAL); 987 988 mr = rxe_alloc(&rxe->mr_pool); 989 if (!mr) { 990 err = -ENOMEM; 991 goto err1; 992 } 993 994 rxe_add_index(mr); 995 996 rxe_add_ref(pd); 997 998 err = rxe_mem_init_fast(pd, max_num_sg, mr); 999 if (err) 1000 goto err2; 1001 1002 return &mr->ibmr; 1003 1004 err2: 1005 rxe_drop_ref(pd); 1006 rxe_drop_index(mr); 1007 rxe_drop_ref(mr); 1008 err1: 1009 return ERR_PTR(err); 1010 } 1011 1012 static int rxe_set_page(struct ib_mr *ibmr, u64 addr) 1013 { 1014 struct rxe_mem *mr = to_rmr(ibmr); 1015 struct rxe_map *map; 1016 struct rxe_phys_buf *buf; 1017 1018 if (unlikely(mr->nbuf == mr->num_buf)) 1019 return -ENOMEM; 1020 1021 map = mr->map[mr->nbuf / RXE_BUF_PER_MAP]; 1022 buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP]; 1023 1024 buf->addr = addr; 1025 buf->size = ibmr->page_size; 1026 mr->nbuf++; 1027 1028 return 0; 1029 } 1030 1031 static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, 1032 int sg_nents, unsigned int *sg_offset) 1033 { 1034 struct rxe_mem *mr = to_rmr(ibmr); 1035 int n; 1036 1037 mr->nbuf = 0; 1038 1039 n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page); 1040 1041 mr->va = ibmr->iova; 1042 mr->iova = ibmr->iova; 1043 mr->length = ibmr->length; 1044 mr->page_shift = ilog2(ibmr->page_size); 1045 mr->page_mask = ibmr->page_size - 1; 1046 mr->offset = mr->iova & mr->page_mask; 1047 1048 return n; 1049 } 1050 1051 static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid) 1052 { 1053 int err; 1054 struct rxe_dev *rxe = to_rdev(ibqp->device); 1055 struct rxe_qp *qp = to_rqp(ibqp); 1056 struct rxe_mc_grp *grp; 1057 1058 /* takes a ref on grp if successful */ 1059 err = rxe_mcast_get_grp(rxe, mgid, &grp); 1060 if (err) 1061 return err; 1062 1063 err = rxe_mcast_add_grp_elem(rxe, qp, grp); 1064 1065 rxe_drop_ref(grp); 1066 return err; 1067 } 1068 1069 static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid) 1070 { 1071 struct rxe_dev *rxe = to_rdev(ibqp->device); 1072 struct rxe_qp *qp = to_rqp(ibqp); 1073 1074 return rxe_mcast_drop_grp_elem(rxe, qp, mgid); 1075 } 1076 1077 static ssize_t parent_show(struct device *device, 1078 struct device_attribute *attr, char *buf) 1079 { 1080 struct rxe_dev *rxe = 1081 rdma_device_to_drv_device(device, struct rxe_dev, ib_dev); 1082 1083 return snprintf(buf, 16, "%s\n", rxe_parent_name(rxe, 1)); 1084 } 1085 1086 static DEVICE_ATTR_RO(parent); 1087 1088 static struct attribute *rxe_dev_attributes[] = { 1089 &dev_attr_parent.attr, 1090 NULL 1091 }; 1092 1093 static const struct attribute_group rxe_attr_group = { 1094 .attrs = rxe_dev_attributes, 1095 }; 1096 1097 static int rxe_enable_driver(struct ib_device *ib_dev) 1098 { 1099 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev); 1100 1101 rxe_set_port_state(rxe); 1102 dev_info(&rxe->ib_dev.dev, "added %s\n", netdev_name(rxe->ndev)); 1103 return 0; 1104 } 1105 1106 static const struct ib_device_ops rxe_dev_ops = { 1107 .owner = THIS_MODULE, 1108 .driver_id = RDMA_DRIVER_RXE, 1109 .uverbs_abi_ver = RXE_UVERBS_ABI_VERSION, 1110 1111 .alloc_hw_stats = rxe_ib_alloc_hw_stats, 1112 .alloc_mr = rxe_alloc_mr, 1113 .alloc_pd = rxe_alloc_pd, 1114 .alloc_ucontext = rxe_alloc_ucontext, 1115 .attach_mcast = rxe_attach_mcast, 1116 .create_ah = rxe_create_ah, 1117 .create_cq = rxe_create_cq, 1118 .create_qp = rxe_create_qp, 1119 .create_srq = rxe_create_srq, 1120 .dealloc_driver = rxe_dealloc, 1121 .dealloc_pd = rxe_dealloc_pd, 1122 .dealloc_ucontext = rxe_dealloc_ucontext, 1123 .dereg_mr = rxe_dereg_mr, 1124 .destroy_ah = rxe_destroy_ah, 1125 .destroy_cq = rxe_destroy_cq, 1126 .destroy_qp = rxe_destroy_qp, 1127 .destroy_srq = rxe_destroy_srq, 1128 .detach_mcast = rxe_detach_mcast, 1129 .enable_driver = rxe_enable_driver, 1130 .get_dma_mr = rxe_get_dma_mr, 1131 .get_hw_stats = rxe_ib_get_hw_stats, 1132 .get_link_layer = rxe_get_link_layer, 1133 .get_port_immutable = rxe_port_immutable, 1134 .map_mr_sg = rxe_map_mr_sg, 1135 .mmap = rxe_mmap, 1136 .modify_ah = rxe_modify_ah, 1137 .modify_device = rxe_modify_device, 1138 .modify_port = rxe_modify_port, 1139 .modify_qp = rxe_modify_qp, 1140 .modify_srq = rxe_modify_srq, 1141 .peek_cq = rxe_peek_cq, 1142 .poll_cq = rxe_poll_cq, 1143 .post_recv = rxe_post_recv, 1144 .post_send = rxe_post_send, 1145 .post_srq_recv = rxe_post_srq_recv, 1146 .query_ah = rxe_query_ah, 1147 .query_device = rxe_query_device, 1148 .query_pkey = rxe_query_pkey, 1149 .query_port = rxe_query_port, 1150 .query_qp = rxe_query_qp, 1151 .query_srq = rxe_query_srq, 1152 .reg_user_mr = rxe_reg_user_mr, 1153 .req_notify_cq = rxe_req_notify_cq, 1154 .resize_cq = rxe_resize_cq, 1155 1156 INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah), 1157 INIT_RDMA_OBJ_SIZE(ib_cq, rxe_cq, ibcq), 1158 INIT_RDMA_OBJ_SIZE(ib_pd, rxe_pd, ibpd), 1159 INIT_RDMA_OBJ_SIZE(ib_srq, rxe_srq, ibsrq), 1160 INIT_RDMA_OBJ_SIZE(ib_ucontext, rxe_ucontext, ibuc), 1161 }; 1162 1163 int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name) 1164 { 1165 int err; 1166 struct ib_device *dev = &rxe->ib_dev; 1167 struct crypto_shash *tfm; 1168 1169 strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc)); 1170 1171 dev->node_type = RDMA_NODE_IB_CA; 1172 dev->phys_port_cnt = 1; 1173 dev->num_comp_vectors = num_possible_cpus(); 1174 dev->dev.parent = rxe_dma_device(rxe); 1175 dev->local_dma_lkey = 0; 1176 addrconf_addr_eui48((unsigned char *)&dev->node_guid, 1177 rxe->ndev->dev_addr); 1178 dev->dev.dma_ops = &dma_virt_ops; 1179 dev->dev.dma_parms = &rxe->dma_parms; 1180 rxe->dma_parms = (struct device_dma_parameters) 1181 { .max_segment_size = SZ_2G }; 1182 dma_coerce_mask_and_coherent(&dev->dev, 1183 dma_get_required_mask(&dev->dev)); 1184 1185 dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT) 1186 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) 1187 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE) 1188 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT) 1189 | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD) 1190 | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD) 1191 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ) 1192 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ) 1193 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ) 1194 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ) 1195 | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV) 1196 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP) 1197 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP) 1198 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP) 1199 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP) 1200 | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND) 1201 | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV) 1202 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ) 1203 | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ) 1204 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ) 1205 | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ) 1206 | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ) 1207 | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) 1208 | BIT_ULL(IB_USER_VERBS_CMD_REG_MR) 1209 | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR) 1210 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH) 1211 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH) 1212 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH) 1213 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH) 1214 | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST) 1215 | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST) 1216 ; 1217 1218 ib_set_device_ops(dev, &rxe_dev_ops); 1219 err = ib_device_set_netdev(&rxe->ib_dev, rxe->ndev, 1); 1220 if (err) 1221 return err; 1222 1223 tfm = crypto_alloc_shash("crc32", 0, 0); 1224 if (IS_ERR(tfm)) { 1225 pr_err("failed to allocate crc algorithm err:%ld\n", 1226 PTR_ERR(tfm)); 1227 return PTR_ERR(tfm); 1228 } 1229 rxe->tfm = tfm; 1230 1231 rdma_set_device_sysfs_group(dev, &rxe_attr_group); 1232 err = ib_register_device(dev, ibdev_name); 1233 if (err) 1234 pr_warn("%s failed with error %d\n", __func__, err); 1235 1236 /* 1237 * Note that rxe may be invalid at this point if another thread 1238 * unregistered it. 1239 */ 1240 return err; 1241 } 1242