1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2/* 3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 5 */ 6 7#include <linux/dma-mapping.h> 8#include <net/addrconf.h> 9#include <rdma/uverbs_ioctl.h> 10#include "rxe.h" 11#include "rxe_loc.h" 12#include "rxe_queue.h" 13#include "rxe_hw_counters.h" 14 15static int rxe_query_device(struct ib_device *dev, 16 struct ib_device_attr *attr, 17 struct ib_udata *uhw) 18{ 19 struct rxe_dev *rxe = to_rdev(dev); 20 21 if (uhw->inlen || uhw->outlen) 22 return -EINVAL; 23 24 *attr = rxe->attr; 25 return 0; 26} 27 28static int rxe_query_port(struct ib_device *dev, 29 u8 port_num, struct ib_port_attr *attr) 30{ 31 struct rxe_dev *rxe = to_rdev(dev); 32 struct rxe_port *port; 33 int rc; 34 35 port = &rxe->port; 36 37 /* *attr being zeroed by the caller, avoid zeroing it here */ 38 *attr = port->attr; 39 40 mutex_lock(&rxe->usdev_lock); 41 rc = ib_get_eth_speed(dev, port_num, &attr->active_speed, 42 &attr->active_width); 43 44 if (attr->state == IB_PORT_ACTIVE) 45 attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP; 46 else if (dev_get_flags(rxe->ndev) & IFF_UP) 47 attr->phys_state = IB_PORT_PHYS_STATE_POLLING; 48 else 49 attr->phys_state = IB_PORT_PHYS_STATE_DISABLED; 50 51 mutex_unlock(&rxe->usdev_lock); 52 53 return rc; 54} 55 56static int rxe_query_pkey(struct ib_device *device, 57 u8 port_num, u16 index, u16 *pkey) 58{ 59 if (index > 0) 60 return -EINVAL; 61 62 *pkey = IB_DEFAULT_PKEY_FULL; 63 return 0; 64} 65 66static int rxe_modify_device(struct ib_device *dev, 67 int mask, struct ib_device_modify *attr) 68{ 69 struct rxe_dev *rxe = to_rdev(dev); 70 71 if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID | 72 IB_DEVICE_MODIFY_NODE_DESC)) 73 return -EOPNOTSUPP; 74 75 if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) 76 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid); 77 78 if (mask & IB_DEVICE_MODIFY_NODE_DESC) { 79 memcpy(rxe->ib_dev.node_desc, 80 attr->node_desc, sizeof(rxe->ib_dev.node_desc)); 81 } 82 83 return 0; 84} 85 86static int rxe_modify_port(struct ib_device *dev, 87 u8 port_num, int mask, struct ib_port_modify *attr) 88{ 89 struct rxe_dev *rxe = to_rdev(dev); 90 struct rxe_port *port; 91 92 port = &rxe->port; 93 94 port->attr.port_cap_flags |= attr->set_port_cap_mask; 95 port->attr.port_cap_flags &= ~attr->clr_port_cap_mask; 96 97 if (mask & IB_PORT_RESET_QKEY_CNTR) 98 port->attr.qkey_viol_cntr = 0; 99 100 return 0; 101} 102 103static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev, 104 u8 port_num) 105{ 106 return IB_LINK_LAYER_ETHERNET; 107} 108 109static int rxe_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata) 110{ 111 struct rxe_dev *rxe = to_rdev(uctx->device); 112 struct rxe_ucontext *uc = to_ruc(uctx); 113 114 return rxe_add_to_pool(&rxe->uc_pool, &uc->pelem); 115} 116 117static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc) 118{ 119 struct rxe_ucontext *uc = to_ruc(ibuc); 120 121 rxe_drop_ref(uc); 122} 123 124static int rxe_port_immutable(struct ib_device *dev, u8 port_num, 125 struct ib_port_immutable *immutable) 126{ 127 int err; 128 struct ib_port_attr attr; 129 130 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP; 131 132 err = ib_query_port(dev, port_num, &attr); 133 if (err) 134 return err; 135 136 immutable->pkey_tbl_len = attr.pkey_tbl_len; 137 immutable->gid_tbl_len = attr.gid_tbl_len; 138 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 139 140 return 0; 141} 142 143static int rxe_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 144{ 145 struct rxe_dev *rxe = to_rdev(ibpd->device); 146 struct rxe_pd *pd = to_rpd(ibpd); 147 148 return rxe_add_to_pool(&rxe->pd_pool, &pd->pelem); 149} 150 151static int rxe_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 152{ 153 struct rxe_pd *pd = to_rpd(ibpd); 154 155 rxe_drop_ref(pd); 156 return 0; 157} 158 159static int rxe_create_ah(struct ib_ah *ibah, 160 struct rdma_ah_init_attr *init_attr, 161 struct ib_udata *udata) 162 163{ 164 int err; 165 struct rxe_dev *rxe = to_rdev(ibah->device); 166 struct rxe_ah *ah = to_rah(ibah); 167 168 err = rxe_av_chk_attr(rxe, init_attr->ah_attr); 169 if (err) 170 return err; 171 172 err = rxe_add_to_pool(&rxe->ah_pool, &ah->pelem); 173 if (err) 174 return err; 175 176 rxe_init_av(init_attr->ah_attr, &ah->av); 177 return 0; 178} 179 180static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) 181{ 182 int err; 183 struct rxe_dev *rxe = to_rdev(ibah->device); 184 struct rxe_ah *ah = to_rah(ibah); 185 186 err = rxe_av_chk_attr(rxe, attr); 187 if (err) 188 return err; 189 190 rxe_init_av(attr, &ah->av); 191 return 0; 192} 193 194static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) 195{ 196 struct rxe_ah *ah = to_rah(ibah); 197 198 memset(attr, 0, sizeof(*attr)); 199 attr->type = ibah->type; 200 rxe_av_to_attr(&ah->av, attr); 201 return 0; 202} 203 204static int rxe_destroy_ah(struct ib_ah *ibah, u32 flags) 205{ 206 struct rxe_ah *ah = to_rah(ibah); 207 208 rxe_drop_ref(ah); 209 return 0; 210} 211 212static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr) 213{ 214 int err; 215 int i; 216 u32 length; 217 struct rxe_recv_wqe *recv_wqe; 218 int num_sge = ibwr->num_sge; 219 220 if (unlikely(queue_full(rq->queue))) { 221 err = -ENOMEM; 222 goto err1; 223 } 224 225 if (unlikely(num_sge > rq->max_sge)) { 226 err = -EINVAL; 227 goto err1; 228 } 229 230 length = 0; 231 for (i = 0; i < num_sge; i++) 232 length += ibwr->sg_list[i].length; 233 234 recv_wqe = producer_addr(rq->queue); 235 recv_wqe->wr_id = ibwr->wr_id; 236 recv_wqe->num_sge = num_sge; 237 238 memcpy(recv_wqe->dma.sge, ibwr->sg_list, 239 num_sge * sizeof(struct ib_sge)); 240 241 recv_wqe->dma.length = length; 242 recv_wqe->dma.resid = length; 243 recv_wqe->dma.num_sge = num_sge; 244 recv_wqe->dma.cur_sge = 0; 245 recv_wqe->dma.sge_offset = 0; 246 247 /* make sure all changes to the work queue are written before we 248 * update the producer pointer 249 */ 250 smp_wmb(); 251 252 advance_producer(rq->queue); 253 return 0; 254 255err1: 256 return err; 257} 258 259static int rxe_create_srq(struct ib_srq *ibsrq, struct ib_srq_init_attr *init, 260 struct ib_udata *udata) 261{ 262 int err; 263 struct rxe_dev *rxe = to_rdev(ibsrq->device); 264 struct rxe_pd *pd = to_rpd(ibsrq->pd); 265 struct rxe_srq *srq = to_rsrq(ibsrq); 266 struct rxe_create_srq_resp __user *uresp = NULL; 267 268 if (udata) { 269 if (udata->outlen < sizeof(*uresp)) 270 return -EINVAL; 271 uresp = udata->outbuf; 272 } 273 274 err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK); 275 if (err) 276 goto err1; 277 278 err = rxe_add_to_pool(&rxe->srq_pool, &srq->pelem); 279 if (err) 280 goto err1; 281 282 rxe_add_ref(pd); 283 srq->pd = pd; 284 285 err = rxe_srq_from_init(rxe, srq, init, udata, uresp); 286 if (err) 287 goto err2; 288 289 return 0; 290 291err2: 292 rxe_drop_ref(pd); 293 rxe_drop_ref(srq); 294err1: 295 return err; 296} 297 298static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, 299 enum ib_srq_attr_mask mask, 300 struct ib_udata *udata) 301{ 302 int err; 303 struct rxe_srq *srq = to_rsrq(ibsrq); 304 struct rxe_dev *rxe = to_rdev(ibsrq->device); 305 struct rxe_modify_srq_cmd ucmd = {}; 306 307 if (udata) { 308 if (udata->inlen < sizeof(ucmd)) 309 return -EINVAL; 310 311 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)); 312 if (err) 313 return err; 314 } 315 316 err = rxe_srq_chk_attr(rxe, srq, attr, mask); 317 if (err) 318 goto err1; 319 320 err = rxe_srq_from_attr(rxe, srq, attr, mask, &ucmd, udata); 321 if (err) 322 goto err1; 323 324 return 0; 325 326err1: 327 return err; 328} 329 330static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr) 331{ 332 struct rxe_srq *srq = to_rsrq(ibsrq); 333 334 if (srq->error) 335 return -EINVAL; 336 337 attr->max_wr = srq->rq.queue->buf->index_mask; 338 attr->max_sge = srq->rq.max_sge; 339 attr->srq_limit = srq->limit; 340 return 0; 341} 342 343static int rxe_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata) 344{ 345 struct rxe_srq *srq = to_rsrq(ibsrq); 346 347 if (srq->rq.queue) 348 rxe_queue_cleanup(srq->rq.queue); 349 350 rxe_drop_ref(srq->pd); 351 rxe_drop_ref(srq); 352 return 0; 353} 354 355static int rxe_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, 356 const struct ib_recv_wr **bad_wr) 357{ 358 int err = 0; 359 unsigned long flags; 360 struct rxe_srq *srq = to_rsrq(ibsrq); 361 362 spin_lock_irqsave(&srq->rq.producer_lock, flags); 363 364 while (wr) { 365 err = post_one_recv(&srq->rq, wr); 366 if (unlikely(err)) 367 break; 368 wr = wr->next; 369 } 370 371 spin_unlock_irqrestore(&srq->rq.producer_lock, flags); 372 373 if (err) 374 *bad_wr = wr; 375 376 return err; 377} 378 379static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd, 380 struct ib_qp_init_attr *init, 381 struct ib_udata *udata) 382{ 383 int err; 384 struct rxe_dev *rxe = to_rdev(ibpd->device); 385 struct rxe_pd *pd = to_rpd(ibpd); 386 struct rxe_qp *qp; 387 struct rxe_create_qp_resp __user *uresp = NULL; 388 389 if (udata) { 390 if (udata->outlen < sizeof(*uresp)) 391 return ERR_PTR(-EINVAL); 392 uresp = udata->outbuf; 393 } 394 395 err = rxe_qp_chk_init(rxe, init); 396 if (err) 397 goto err1; 398 399 qp = rxe_alloc(&rxe->qp_pool); 400 if (!qp) { 401 err = -ENOMEM; 402 goto err1; 403 } 404 405 if (udata) { 406 if (udata->inlen) { 407 err = -EINVAL; 408 goto err2; 409 } 410 qp->is_user = 1; 411 } 412 413 rxe_add_index(qp); 414 415 err = rxe_qp_from_init(rxe, qp, pd, init, uresp, ibpd, udata); 416 if (err) 417 goto err3; 418 419 return &qp->ibqp; 420 421err3: 422 rxe_drop_index(qp); 423err2: 424 rxe_drop_ref(qp); 425err1: 426 return ERR_PTR(err); 427} 428 429static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 430 int mask, struct ib_udata *udata) 431{ 432 int err; 433 struct rxe_dev *rxe = to_rdev(ibqp->device); 434 struct rxe_qp *qp = to_rqp(ibqp); 435 436 err = rxe_qp_chk_attr(rxe, qp, attr, mask); 437 if (err) 438 goto err1; 439 440 err = rxe_qp_from_attr(qp, attr, mask, udata); 441 if (err) 442 goto err1; 443 444 return 0; 445 446err1: 447 return err; 448} 449 450static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 451 int mask, struct ib_qp_init_attr *init) 452{ 453 struct rxe_qp *qp = to_rqp(ibqp); 454 455 rxe_qp_to_init(qp, init); 456 rxe_qp_to_attr(qp, attr, mask); 457 458 return 0; 459} 460 461static int rxe_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) 462{ 463 struct rxe_qp *qp = to_rqp(ibqp); 464 465 rxe_qp_destroy(qp); 466 rxe_drop_index(qp); 467 rxe_drop_ref(qp); 468 return 0; 469} 470 471static int validate_send_wr(struct rxe_qp *qp, const struct ib_send_wr *ibwr, 472 unsigned int mask, unsigned int length) 473{ 474 int num_sge = ibwr->num_sge; 475 struct rxe_sq *sq = &qp->sq; 476 477 if (unlikely(num_sge > sq->max_sge)) 478 goto err1; 479 480 if (unlikely(mask & WR_ATOMIC_MASK)) { 481 if (length < 8) 482 goto err1; 483 484 if (atomic_wr(ibwr)->remote_addr & 0x7) 485 goto err1; 486 } 487 488 if (unlikely((ibwr->send_flags & IB_SEND_INLINE) && 489 (length > sq->max_inline))) 490 goto err1; 491 492 return 0; 493 494err1: 495 return -EINVAL; 496} 497 498static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr, 499 const struct ib_send_wr *ibwr) 500{ 501 wr->wr_id = ibwr->wr_id; 502 wr->num_sge = ibwr->num_sge; 503 wr->opcode = ibwr->opcode; 504 wr->send_flags = ibwr->send_flags; 505 506 if (qp_type(qp) == IB_QPT_UD || 507 qp_type(qp) == IB_QPT_SMI || 508 qp_type(qp) == IB_QPT_GSI) { 509 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn; 510 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey; 511 if (qp_type(qp) == IB_QPT_GSI) 512 wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index; 513 if (wr->opcode == IB_WR_SEND_WITH_IMM) 514 wr->ex.imm_data = ibwr->ex.imm_data; 515 } else { 516 switch (wr->opcode) { 517 case IB_WR_RDMA_WRITE_WITH_IMM: 518 wr->ex.imm_data = ibwr->ex.imm_data; 519 fallthrough; 520 case IB_WR_RDMA_READ: 521 case IB_WR_RDMA_WRITE: 522 wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr; 523 wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey; 524 break; 525 case IB_WR_SEND_WITH_IMM: 526 wr->ex.imm_data = ibwr->ex.imm_data; 527 break; 528 case IB_WR_SEND_WITH_INV: 529 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; 530 break; 531 case IB_WR_ATOMIC_CMP_AND_SWP: 532 case IB_WR_ATOMIC_FETCH_AND_ADD: 533 wr->wr.atomic.remote_addr = 534 atomic_wr(ibwr)->remote_addr; 535 wr->wr.atomic.compare_add = 536 atomic_wr(ibwr)->compare_add; 537 wr->wr.atomic.swap = atomic_wr(ibwr)->swap; 538 wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey; 539 break; 540 case IB_WR_LOCAL_INV: 541 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; 542 break; 543 case IB_WR_REG_MR: 544 wr->wr.reg.mr = reg_wr(ibwr)->mr; 545 wr->wr.reg.key = reg_wr(ibwr)->key; 546 wr->wr.reg.access = reg_wr(ibwr)->access; 547 break; 548 default: 549 break; 550 } 551 } 552} 553 554static int init_send_wqe(struct rxe_qp *qp, const struct ib_send_wr *ibwr, 555 unsigned int mask, unsigned int length, 556 struct rxe_send_wqe *wqe) 557{ 558 int num_sge = ibwr->num_sge; 559 struct ib_sge *sge; 560 int i; 561 u8 *p; 562 563 init_send_wr(qp, &wqe->wr, ibwr); 564 565 if (qp_type(qp) == IB_QPT_UD || 566 qp_type(qp) == IB_QPT_SMI || 567 qp_type(qp) == IB_QPT_GSI) 568 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av)); 569 570 if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) { 571 p = wqe->dma.inline_data; 572 573 sge = ibwr->sg_list; 574 for (i = 0; i < num_sge; i++, sge++) { 575 memcpy(p, (void *)(uintptr_t)sge->addr, 576 sge->length); 577 578 p += sge->length; 579 } 580 } else if (mask & WR_REG_MASK) { 581 wqe->mask = mask; 582 wqe->state = wqe_state_posted; 583 return 0; 584 } else 585 memcpy(wqe->dma.sge, ibwr->sg_list, 586 num_sge * sizeof(struct ib_sge)); 587 588 wqe->iova = mask & WR_ATOMIC_MASK ? atomic_wr(ibwr)->remote_addr : 589 mask & WR_READ_OR_WRITE_MASK ? rdma_wr(ibwr)->remote_addr : 0; 590 wqe->mask = mask; 591 wqe->dma.length = length; 592 wqe->dma.resid = length; 593 wqe->dma.num_sge = num_sge; 594 wqe->dma.cur_sge = 0; 595 wqe->dma.sge_offset = 0; 596 wqe->state = wqe_state_posted; 597 wqe->ssn = atomic_add_return(1, &qp->ssn); 598 599 return 0; 600} 601 602static int post_one_send(struct rxe_qp *qp, const struct ib_send_wr *ibwr, 603 unsigned int mask, u32 length) 604{ 605 int err; 606 struct rxe_sq *sq = &qp->sq; 607 struct rxe_send_wqe *send_wqe; 608 unsigned long flags; 609 610 err = validate_send_wr(qp, ibwr, mask, length); 611 if (err) 612 return err; 613 614 spin_lock_irqsave(&qp->sq.sq_lock, flags); 615 616 if (unlikely(queue_full(sq->queue))) { 617 err = -ENOMEM; 618 goto err1; 619 } 620 621 send_wqe = producer_addr(sq->queue); 622 623 err = init_send_wqe(qp, ibwr, mask, length, send_wqe); 624 if (unlikely(err)) 625 goto err1; 626 627 /* 628 * make sure all changes to the work queue are 629 * written before we update the producer pointer 630 */ 631 smp_wmb(); 632 633 advance_producer(sq->queue); 634 spin_unlock_irqrestore(&qp->sq.sq_lock, flags); 635 636 return 0; 637 638err1: 639 spin_unlock_irqrestore(&qp->sq.sq_lock, flags); 640 return err; 641} 642 643static int rxe_post_send_kernel(struct rxe_qp *qp, const struct ib_send_wr *wr, 644 const struct ib_send_wr **bad_wr) 645{ 646 int err = 0; 647 unsigned int mask; 648 unsigned int length = 0; 649 int i; 650 struct ib_send_wr *next; 651 652 while (wr) { 653 mask = wr_opcode_mask(wr->opcode, qp); 654 if (unlikely(!mask)) { 655 err = -EINVAL; 656 *bad_wr = wr; 657 break; 658 } 659 660 if (unlikely((wr->send_flags & IB_SEND_INLINE) && 661 !(mask & WR_INLINE_MASK))) { 662 err = -EINVAL; 663 *bad_wr = wr; 664 break; 665 } 666 667 next = wr->next; 668 669 length = 0; 670 for (i = 0; i < wr->num_sge; i++) 671 length += wr->sg_list[i].length; 672 673 err = post_one_send(qp, wr, mask, length); 674 675 if (err) { 676 *bad_wr = wr; 677 break; 678 } 679 wr = next; 680 } 681 682 rxe_run_task(&qp->req.task, 1); 683 if (unlikely(qp->req.state == QP_STATE_ERROR)) 684 rxe_run_task(&qp->comp.task, 1); 685 686 return err; 687} 688 689static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 690 const struct ib_send_wr **bad_wr) 691{ 692 struct rxe_qp *qp = to_rqp(ibqp); 693 694 if (unlikely(!qp->valid)) { 695 *bad_wr = wr; 696 return -EINVAL; 697 } 698 699 if (unlikely(qp->req.state < QP_STATE_READY)) { 700 *bad_wr = wr; 701 return -EINVAL; 702 } 703 704 if (qp->is_user) { 705 /* Utilize process context to do protocol processing */ 706 rxe_run_task(&qp->req.task, 0); 707 return 0; 708 } else 709 return rxe_post_send_kernel(qp, wr, bad_wr); 710} 711 712static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 713 const struct ib_recv_wr **bad_wr) 714{ 715 int err = 0; 716 struct rxe_qp *qp = to_rqp(ibqp); 717 struct rxe_rq *rq = &qp->rq; 718 unsigned long flags; 719 720 if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) { 721 *bad_wr = wr; 722 err = -EINVAL; 723 goto err1; 724 } 725 726 if (unlikely(qp->srq)) { 727 *bad_wr = wr; 728 err = -EINVAL; 729 goto err1; 730 } 731 732 spin_lock_irqsave(&rq->producer_lock, flags); 733 734 while (wr) { 735 err = post_one_recv(rq, wr); 736 if (unlikely(err)) { 737 *bad_wr = wr; 738 break; 739 } 740 wr = wr->next; 741 } 742 743 spin_unlock_irqrestore(&rq->producer_lock, flags); 744 745 if (qp->resp.state == QP_STATE_ERROR) 746 rxe_run_task(&qp->resp.task, 1); 747 748err1: 749 return err; 750} 751 752static int rxe_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, 753 struct ib_udata *udata) 754{ 755 int err; 756 struct ib_device *dev = ibcq->device; 757 struct rxe_dev *rxe = to_rdev(dev); 758 struct rxe_cq *cq = to_rcq(ibcq); 759 struct rxe_create_cq_resp __user *uresp = NULL; 760 761 if (udata) { 762 if (udata->outlen < sizeof(*uresp)) 763 return -EINVAL; 764 uresp = udata->outbuf; 765 } 766 767 if (attr->flags) 768 return -EINVAL; 769 770 err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector); 771 if (err) 772 return err; 773 774 err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector, udata, 775 uresp); 776 if (err) 777 return err; 778 779 return rxe_add_to_pool(&rxe->cq_pool, &cq->pelem); 780} 781 782static int rxe_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata) 783{ 784 struct rxe_cq *cq = to_rcq(ibcq); 785 786 rxe_cq_disable(cq); 787 788 rxe_drop_ref(cq); 789 return 0; 790} 791 792static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata) 793{ 794 int err; 795 struct rxe_cq *cq = to_rcq(ibcq); 796 struct rxe_dev *rxe = to_rdev(ibcq->device); 797 struct rxe_resize_cq_resp __user *uresp = NULL; 798 799 if (udata) { 800 if (udata->outlen < sizeof(*uresp)) 801 return -EINVAL; 802 uresp = udata->outbuf; 803 } 804 805 err = rxe_cq_chk_attr(rxe, cq, cqe, 0); 806 if (err) 807 goto err1; 808 809 err = rxe_cq_resize_queue(cq, cqe, uresp, udata); 810 if (err) 811 goto err1; 812 813 return 0; 814 815err1: 816 return err; 817} 818 819static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) 820{ 821 int i; 822 struct rxe_cq *cq = to_rcq(ibcq); 823 struct rxe_cqe *cqe; 824 unsigned long flags; 825 826 spin_lock_irqsave(&cq->cq_lock, flags); 827 for (i = 0; i < num_entries; i++) { 828 cqe = queue_head(cq->queue); 829 if (!cqe) 830 break; 831 832 memcpy(wc++, &cqe->ibwc, sizeof(*wc)); 833 advance_consumer(cq->queue); 834 } 835 spin_unlock_irqrestore(&cq->cq_lock, flags); 836 837 return i; 838} 839 840static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt) 841{ 842 struct rxe_cq *cq = to_rcq(ibcq); 843 int count = queue_count(cq->queue); 844 845 return (count > wc_cnt) ? wc_cnt : count; 846} 847 848static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) 849{ 850 struct rxe_cq *cq = to_rcq(ibcq); 851 unsigned long irq_flags; 852 int ret = 0; 853 854 spin_lock_irqsave(&cq->cq_lock, irq_flags); 855 if (cq->notify != IB_CQ_NEXT_COMP) 856 cq->notify = flags & IB_CQ_SOLICITED_MASK; 857 858 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !queue_empty(cq->queue)) 859 ret = 1; 860 861 spin_unlock_irqrestore(&cq->cq_lock, irq_flags); 862 863 return ret; 864} 865 866static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access) 867{ 868 struct rxe_dev *rxe = to_rdev(ibpd->device); 869 struct rxe_pd *pd = to_rpd(ibpd); 870 struct rxe_mem *mr; 871 872 mr = rxe_alloc(&rxe->mr_pool); 873 if (!mr) 874 return ERR_PTR(-ENOMEM); 875 876 rxe_add_index(mr); 877 rxe_add_ref(pd); 878 rxe_mem_init_dma(pd, access, mr); 879 880 return &mr->ibmr; 881} 882 883static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd, 884 u64 start, 885 u64 length, 886 u64 iova, 887 int access, struct ib_udata *udata) 888{ 889 int err; 890 struct rxe_dev *rxe = to_rdev(ibpd->device); 891 struct rxe_pd *pd = to_rpd(ibpd); 892 struct rxe_mem *mr; 893 894 mr = rxe_alloc(&rxe->mr_pool); 895 if (!mr) { 896 err = -ENOMEM; 897 goto err2; 898 } 899 900 rxe_add_index(mr); 901 902 rxe_add_ref(pd); 903 904 err = rxe_mem_init_user(pd, start, length, iova, 905 access, udata, mr); 906 if (err) 907 goto err3; 908 909 return &mr->ibmr; 910 911err3: 912 rxe_drop_ref(pd); 913 rxe_drop_index(mr); 914 rxe_drop_ref(mr); 915err2: 916 return ERR_PTR(err); 917} 918 919static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) 920{ 921 struct rxe_mem *mr = to_rmr(ibmr); 922 923 mr->state = RXE_MEM_STATE_ZOMBIE; 924 rxe_drop_ref(mr_pd(mr)); 925 rxe_drop_index(mr); 926 rxe_drop_ref(mr); 927 return 0; 928} 929 930static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type, 931 u32 max_num_sg) 932{ 933 struct rxe_dev *rxe = to_rdev(ibpd->device); 934 struct rxe_pd *pd = to_rpd(ibpd); 935 struct rxe_mem *mr; 936 int err; 937 938 if (mr_type != IB_MR_TYPE_MEM_REG) 939 return ERR_PTR(-EINVAL); 940 941 mr = rxe_alloc(&rxe->mr_pool); 942 if (!mr) { 943 err = -ENOMEM; 944 goto err1; 945 } 946 947 rxe_add_index(mr); 948 949 rxe_add_ref(pd); 950 951 err = rxe_mem_init_fast(pd, max_num_sg, mr); 952 if (err) 953 goto err2; 954 955 return &mr->ibmr; 956 957err2: 958 rxe_drop_ref(pd); 959 rxe_drop_index(mr); 960 rxe_drop_ref(mr); 961err1: 962 return ERR_PTR(err); 963} 964 965static int rxe_set_page(struct ib_mr *ibmr, u64 addr) 966{ 967 struct rxe_mem *mr = to_rmr(ibmr); 968 struct rxe_map *map; 969 struct rxe_phys_buf *buf; 970 971 if (unlikely(mr->nbuf == mr->num_buf)) 972 return -ENOMEM; 973 974 map = mr->map[mr->nbuf / RXE_BUF_PER_MAP]; 975 buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP]; 976 977 buf->addr = addr; 978 buf->size = ibmr->page_size; 979 mr->nbuf++; 980 981 return 0; 982} 983 984static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, 985 int sg_nents, unsigned int *sg_offset) 986{ 987 struct rxe_mem *mr = to_rmr(ibmr); 988 int n; 989 990 mr->nbuf = 0; 991 992 n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page); 993 994 mr->va = ibmr->iova; 995 mr->iova = ibmr->iova; 996 mr->length = ibmr->length; 997 mr->page_shift = ilog2(ibmr->page_size); 998 mr->page_mask = ibmr->page_size - 1; 999 mr->offset = mr->iova & mr->page_mask; 1000 1001 return n; 1002} 1003 1004static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid) 1005{ 1006 int err; 1007 struct rxe_dev *rxe = to_rdev(ibqp->device); 1008 struct rxe_qp *qp = to_rqp(ibqp); 1009 struct rxe_mc_grp *grp; 1010 1011 /* takes a ref on grp if successful */ 1012 err = rxe_mcast_get_grp(rxe, mgid, &grp); 1013 if (err) 1014 return err; 1015 1016 err = rxe_mcast_add_grp_elem(rxe, qp, grp); 1017 1018 rxe_drop_ref(grp); 1019 return err; 1020} 1021 1022static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid) 1023{ 1024 struct rxe_dev *rxe = to_rdev(ibqp->device); 1025 struct rxe_qp *qp = to_rqp(ibqp); 1026 1027 return rxe_mcast_drop_grp_elem(rxe, qp, mgid); 1028} 1029 1030static ssize_t parent_show(struct device *device, 1031 struct device_attribute *attr, char *buf) 1032{ 1033 struct rxe_dev *rxe = 1034 rdma_device_to_drv_device(device, struct rxe_dev, ib_dev); 1035 1036 return scnprintf(buf, PAGE_SIZE, "%s\n", rxe_parent_name(rxe, 1)); 1037} 1038 1039static DEVICE_ATTR_RO(parent); 1040 1041static struct attribute *rxe_dev_attributes[] = { 1042 &dev_attr_parent.attr, 1043 NULL 1044}; 1045 1046static const struct attribute_group rxe_attr_group = { 1047 .attrs = rxe_dev_attributes, 1048}; 1049 1050static int rxe_enable_driver(struct ib_device *ib_dev) 1051{ 1052 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev); 1053 1054 rxe_set_port_state(rxe); 1055 dev_info(&rxe->ib_dev.dev, "added %s\n", netdev_name(rxe->ndev)); 1056 return 0; 1057} 1058 1059static const struct ib_device_ops rxe_dev_ops = { 1060 .owner = THIS_MODULE, 1061 .driver_id = RDMA_DRIVER_RXE, 1062 .uverbs_abi_ver = RXE_UVERBS_ABI_VERSION, 1063 1064 .alloc_hw_stats = rxe_ib_alloc_hw_stats, 1065 .alloc_mr = rxe_alloc_mr, 1066 .alloc_pd = rxe_alloc_pd, 1067 .alloc_ucontext = rxe_alloc_ucontext, 1068 .attach_mcast = rxe_attach_mcast, 1069 .create_ah = rxe_create_ah, 1070 .create_cq = rxe_create_cq, 1071 .create_qp = rxe_create_qp, 1072 .create_srq = rxe_create_srq, 1073 .dealloc_driver = rxe_dealloc, 1074 .dealloc_pd = rxe_dealloc_pd, 1075 .dealloc_ucontext = rxe_dealloc_ucontext, 1076 .dereg_mr = rxe_dereg_mr, 1077 .destroy_ah = rxe_destroy_ah, 1078 .destroy_cq = rxe_destroy_cq, 1079 .destroy_qp = rxe_destroy_qp, 1080 .destroy_srq = rxe_destroy_srq, 1081 .detach_mcast = rxe_detach_mcast, 1082 .enable_driver = rxe_enable_driver, 1083 .get_dma_mr = rxe_get_dma_mr, 1084 .get_hw_stats = rxe_ib_get_hw_stats, 1085 .get_link_layer = rxe_get_link_layer, 1086 .get_port_immutable = rxe_port_immutable, 1087 .map_mr_sg = rxe_map_mr_sg, 1088 .mmap = rxe_mmap, 1089 .modify_ah = rxe_modify_ah, 1090 .modify_device = rxe_modify_device, 1091 .modify_port = rxe_modify_port, 1092 .modify_qp = rxe_modify_qp, 1093 .modify_srq = rxe_modify_srq, 1094 .peek_cq = rxe_peek_cq, 1095 .poll_cq = rxe_poll_cq, 1096 .post_recv = rxe_post_recv, 1097 .post_send = rxe_post_send, 1098 .post_srq_recv = rxe_post_srq_recv, 1099 .query_ah = rxe_query_ah, 1100 .query_device = rxe_query_device, 1101 .query_pkey = rxe_query_pkey, 1102 .query_port = rxe_query_port, 1103 .query_qp = rxe_query_qp, 1104 .query_srq = rxe_query_srq, 1105 .reg_user_mr = rxe_reg_user_mr, 1106 .req_notify_cq = rxe_req_notify_cq, 1107 .resize_cq = rxe_resize_cq, 1108 1109 INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah), 1110 INIT_RDMA_OBJ_SIZE(ib_cq, rxe_cq, ibcq), 1111 INIT_RDMA_OBJ_SIZE(ib_pd, rxe_pd, ibpd), 1112 INIT_RDMA_OBJ_SIZE(ib_srq, rxe_srq, ibsrq), 1113 INIT_RDMA_OBJ_SIZE(ib_ucontext, rxe_ucontext, ibuc), 1114}; 1115 1116int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name) 1117{ 1118 int err; 1119 struct ib_device *dev = &rxe->ib_dev; 1120 struct crypto_shash *tfm; 1121 1122 strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc)); 1123 1124 dev->node_type = RDMA_NODE_IB_CA; 1125 dev->phys_port_cnt = 1; 1126 dev->num_comp_vectors = num_possible_cpus(); 1127 dev->local_dma_lkey = 0; 1128 addrconf_addr_eui48((unsigned char *)&dev->node_guid, 1129 rxe->ndev->dev_addr); 1130 1131 dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT) 1132 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) 1133 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE) 1134 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT) 1135 | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD) 1136 | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD) 1137 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ) 1138 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ) 1139 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ) 1140 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ) 1141 | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV) 1142 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP) 1143 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP) 1144 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP) 1145 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP) 1146 | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND) 1147 | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV) 1148 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ) 1149 | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ) 1150 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ) 1151 | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ) 1152 | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ) 1153 | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) 1154 | BIT_ULL(IB_USER_VERBS_CMD_REG_MR) 1155 | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR) 1156 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH) 1157 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH) 1158 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH) 1159 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH) 1160 | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST) 1161 | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST) 1162 ; 1163 1164 ib_set_device_ops(dev, &rxe_dev_ops); 1165 err = ib_device_set_netdev(&rxe->ib_dev, rxe->ndev, 1); 1166 if (err) 1167 return err; 1168 1169 tfm = crypto_alloc_shash("crc32", 0, 0); 1170 if (IS_ERR(tfm)) { 1171 pr_err("failed to allocate crc algorithm err:%ld\n", 1172 PTR_ERR(tfm)); 1173 return PTR_ERR(tfm); 1174 } 1175 rxe->tfm = tfm; 1176 1177 rdma_set_device_sysfs_group(dev, &rxe_attr_group); 1178 err = ib_register_device(dev, ibdev_name, NULL); 1179 if (err) 1180 pr_warn("%s failed with error %d\n", __func__, err); 1181 1182 /* 1183 * Note that rxe may be invalid at this point if another thread 1184 * unregistered it. 1185 */ 1186 return err; 1187} 1188