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 = RDMA_LINK_PHYS_STATE_LINK_UP; 73 else if (dev_get_flags(rxe->ndev) & IFF_UP) 74 attr->phys_state = RDMA_LINK_PHYS_STATE_POLLING; 75 else 76 attr->phys_state = RDMA_LINK_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 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid); 111 112 if (mask & IB_DEVICE_MODIFY_NODE_DESC) { 113 memcpy(rxe->ib_dev.node_desc, 114 attr->node_desc, sizeof(rxe->ib_dev.node_desc)); 115 } 116 117 return 0; 118 } 119 120 static int rxe_modify_port(struct ib_device *dev, 121 u8 port_num, int mask, struct ib_port_modify *attr) 122 { 123 struct rxe_dev *rxe = to_rdev(dev); 124 struct rxe_port *port; 125 126 port = &rxe->port; 127 128 port->attr.port_cap_flags |= attr->set_port_cap_mask; 129 port->attr.port_cap_flags &= ~attr->clr_port_cap_mask; 130 131 if (mask & IB_PORT_RESET_QKEY_CNTR) 132 port->attr.qkey_viol_cntr = 0; 133 134 return 0; 135 } 136 137 static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev, 138 u8 port_num) 139 { 140 struct rxe_dev *rxe = to_rdev(dev); 141 142 return rxe_link_layer(rxe, port_num); 143 } 144 145 static int rxe_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata) 146 { 147 struct rxe_dev *rxe = to_rdev(uctx->device); 148 struct rxe_ucontext *uc = to_ruc(uctx); 149 150 return rxe_add_to_pool(&rxe->uc_pool, &uc->pelem); 151 } 152 153 static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc) 154 { 155 struct rxe_ucontext *uc = to_ruc(ibuc); 156 157 rxe_drop_ref(uc); 158 } 159 160 static int rxe_port_immutable(struct ib_device *dev, u8 port_num, 161 struct ib_port_immutable *immutable) 162 { 163 int err; 164 struct ib_port_attr attr; 165 166 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP; 167 168 err = ib_query_port(dev, port_num, &attr); 169 if (err) 170 return err; 171 172 immutable->pkey_tbl_len = attr.pkey_tbl_len; 173 immutable->gid_tbl_len = attr.gid_tbl_len; 174 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 175 176 return 0; 177 } 178 179 static int rxe_alloc_pd(struct ib_pd *ibpd, struct ib_ucontext *context, 180 struct ib_udata *udata) 181 { 182 struct rxe_dev *rxe = to_rdev(ibpd->device); 183 struct rxe_pd *pd = to_rpd(ibpd); 184 185 return rxe_add_to_pool(&rxe->pd_pool, &pd->pelem); 186 } 187 188 static void rxe_dealloc_pd(struct ib_pd *ibpd) 189 { 190 struct rxe_pd *pd = to_rpd(ibpd); 191 192 rxe_drop_ref(pd); 193 } 194 195 static struct ib_ah *rxe_create_ah(struct ib_pd *ibpd, 196 struct rdma_ah_attr *attr, 197 u32 flags, 198 struct ib_udata *udata) 199 200 { 201 int err; 202 struct rxe_dev *rxe = to_rdev(ibpd->device); 203 struct rxe_pd *pd = to_rpd(ibpd); 204 struct rxe_ah *ah; 205 206 err = rxe_av_chk_attr(rxe, attr); 207 if (err) 208 return ERR_PTR(err); 209 210 ah = rxe_alloc(&rxe->ah_pool); 211 if (!ah) 212 return ERR_PTR(-ENOMEM); 213 214 rxe_add_ref(pd); 215 ah->pd = pd; 216 217 rxe_init_av(attr, &ah->av); 218 return &ah->ibah; 219 } 220 221 static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) 222 { 223 int err; 224 struct rxe_dev *rxe = to_rdev(ibah->device); 225 struct rxe_ah *ah = to_rah(ibah); 226 227 err = rxe_av_chk_attr(rxe, attr); 228 if (err) 229 return err; 230 231 rxe_init_av(attr, &ah->av); 232 return 0; 233 } 234 235 static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) 236 { 237 struct rxe_ah *ah = to_rah(ibah); 238 239 memset(attr, 0, sizeof(*attr)); 240 attr->type = ibah->type; 241 rxe_av_to_attr(&ah->av, attr); 242 return 0; 243 } 244 245 static int rxe_destroy_ah(struct ib_ah *ibah, u32 flags) 246 { 247 struct rxe_ah *ah = to_rah(ibah); 248 249 rxe_drop_ref(ah->pd); 250 rxe_drop_ref(ah); 251 return 0; 252 } 253 254 static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr) 255 { 256 int err; 257 int i; 258 u32 length; 259 struct rxe_recv_wqe *recv_wqe; 260 int num_sge = ibwr->num_sge; 261 262 if (unlikely(queue_full(rq->queue))) { 263 err = -ENOMEM; 264 goto err1; 265 } 266 267 if (unlikely(num_sge > rq->max_sge)) { 268 err = -EINVAL; 269 goto err1; 270 } 271 272 length = 0; 273 for (i = 0; i < num_sge; i++) 274 length += ibwr->sg_list[i].length; 275 276 recv_wqe = producer_addr(rq->queue); 277 recv_wqe->wr_id = ibwr->wr_id; 278 recv_wqe->num_sge = num_sge; 279 280 memcpy(recv_wqe->dma.sge, ibwr->sg_list, 281 num_sge * sizeof(struct ib_sge)); 282 283 recv_wqe->dma.length = length; 284 recv_wqe->dma.resid = length; 285 recv_wqe->dma.num_sge = num_sge; 286 recv_wqe->dma.cur_sge = 0; 287 recv_wqe->dma.sge_offset = 0; 288 289 /* make sure all changes to the work queue are written before we 290 * update the producer pointer 291 */ 292 smp_wmb(); 293 294 advance_producer(rq->queue); 295 return 0; 296 297 err1: 298 return err; 299 } 300 301 static struct ib_srq *rxe_create_srq(struct ib_pd *ibpd, 302 struct ib_srq_init_attr *init, 303 struct ib_udata *udata) 304 { 305 int err; 306 struct rxe_dev *rxe = to_rdev(ibpd->device); 307 struct rxe_pd *pd = to_rpd(ibpd); 308 struct rxe_ucontext *ucontext = 309 rdma_udata_to_drv_context(udata, struct rxe_ucontext, ibuc); 310 struct rxe_srq *srq; 311 struct rxe_create_srq_resp __user *uresp = NULL; 312 313 if (udata) { 314 if (udata->outlen < sizeof(*uresp)) 315 return ERR_PTR(-EINVAL); 316 uresp = udata->outbuf; 317 } 318 319 err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK); 320 if (err) 321 goto err1; 322 323 srq = rxe_alloc(&rxe->srq_pool); 324 if (!srq) { 325 err = -ENOMEM; 326 goto err1; 327 } 328 329 rxe_add_index(srq); 330 rxe_add_ref(pd); 331 srq->pd = pd; 332 333 err = rxe_srq_from_init(rxe, srq, init, &ucontext->ibuc, uresp); 334 if (err) 335 goto err2; 336 337 return &srq->ibsrq; 338 339 err2: 340 rxe_drop_ref(pd); 341 rxe_drop_index(srq); 342 rxe_drop_ref(srq); 343 err1: 344 return ERR_PTR(err); 345 } 346 347 static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, 348 enum ib_srq_attr_mask mask, 349 struct ib_udata *udata) 350 { 351 int err; 352 struct rxe_srq *srq = to_rsrq(ibsrq); 353 struct rxe_dev *rxe = to_rdev(ibsrq->device); 354 struct rxe_modify_srq_cmd ucmd = {}; 355 356 if (udata) { 357 if (udata->inlen < sizeof(ucmd)) 358 return -EINVAL; 359 360 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)); 361 if (err) 362 return err; 363 } 364 365 err = rxe_srq_chk_attr(rxe, srq, attr, mask); 366 if (err) 367 goto err1; 368 369 err = rxe_srq_from_attr(rxe, srq, attr, mask, &ucmd); 370 if (err) 371 goto err1; 372 373 return 0; 374 375 err1: 376 return err; 377 } 378 379 static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr) 380 { 381 struct rxe_srq *srq = to_rsrq(ibsrq); 382 383 if (srq->error) 384 return -EINVAL; 385 386 attr->max_wr = srq->rq.queue->buf->index_mask; 387 attr->max_sge = srq->rq.max_sge; 388 attr->srq_limit = srq->limit; 389 return 0; 390 } 391 392 static int rxe_destroy_srq(struct ib_srq *ibsrq) 393 { 394 struct rxe_srq *srq = to_rsrq(ibsrq); 395 396 if (srq->rq.queue) 397 rxe_queue_cleanup(srq->rq.queue); 398 399 rxe_drop_ref(srq->pd); 400 rxe_drop_index(srq); 401 rxe_drop_ref(srq); 402 403 return 0; 404 } 405 406 static int rxe_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, 407 const struct ib_recv_wr **bad_wr) 408 { 409 int err = 0; 410 unsigned long flags; 411 struct rxe_srq *srq = to_rsrq(ibsrq); 412 413 spin_lock_irqsave(&srq->rq.producer_lock, flags); 414 415 while (wr) { 416 err = post_one_recv(&srq->rq, wr); 417 if (unlikely(err)) 418 break; 419 wr = wr->next; 420 } 421 422 spin_unlock_irqrestore(&srq->rq.producer_lock, flags); 423 424 if (err) 425 *bad_wr = wr; 426 427 return err; 428 } 429 430 static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd, 431 struct ib_qp_init_attr *init, 432 struct ib_udata *udata) 433 { 434 int err; 435 struct rxe_dev *rxe = to_rdev(ibpd->device); 436 struct rxe_pd *pd = to_rpd(ibpd); 437 struct rxe_qp *qp; 438 struct rxe_create_qp_resp __user *uresp = NULL; 439 440 if (udata) { 441 if (udata->outlen < sizeof(*uresp)) 442 return ERR_PTR(-EINVAL); 443 uresp = udata->outbuf; 444 } 445 446 err = rxe_qp_chk_init(rxe, init); 447 if (err) 448 goto err1; 449 450 qp = rxe_alloc(&rxe->qp_pool); 451 if (!qp) { 452 err = -ENOMEM; 453 goto err1; 454 } 455 456 if (udata) { 457 if (udata->inlen) { 458 err = -EINVAL; 459 goto err2; 460 } 461 qp->is_user = 1; 462 } 463 464 rxe_add_index(qp); 465 466 err = rxe_qp_from_init(rxe, qp, pd, init, uresp, ibpd, udata); 467 if (err) 468 goto err3; 469 470 return &qp->ibqp; 471 472 err3: 473 rxe_drop_index(qp); 474 err2: 475 rxe_drop_ref(qp); 476 err1: 477 return ERR_PTR(err); 478 } 479 480 static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 481 int mask, struct ib_udata *udata) 482 { 483 int err; 484 struct rxe_dev *rxe = to_rdev(ibqp->device); 485 struct rxe_qp *qp = to_rqp(ibqp); 486 487 err = rxe_qp_chk_attr(rxe, qp, attr, mask); 488 if (err) 489 goto err1; 490 491 err = rxe_qp_from_attr(qp, attr, mask, udata); 492 if (err) 493 goto err1; 494 495 return 0; 496 497 err1: 498 return err; 499 } 500 501 static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 502 int mask, struct ib_qp_init_attr *init) 503 { 504 struct rxe_qp *qp = to_rqp(ibqp); 505 506 rxe_qp_to_init(qp, init); 507 rxe_qp_to_attr(qp, attr, mask); 508 509 return 0; 510 } 511 512 static int rxe_destroy_qp(struct ib_qp *ibqp) 513 { 514 struct rxe_qp *qp = to_rqp(ibqp); 515 516 rxe_qp_destroy(qp); 517 rxe_drop_index(qp); 518 rxe_drop_ref(qp); 519 return 0; 520 } 521 522 static int validate_send_wr(struct rxe_qp *qp, const struct ib_send_wr *ibwr, 523 unsigned int mask, unsigned int length) 524 { 525 int num_sge = ibwr->num_sge; 526 struct rxe_sq *sq = &qp->sq; 527 528 if (unlikely(num_sge > sq->max_sge)) 529 goto err1; 530 531 if (unlikely(mask & WR_ATOMIC_MASK)) { 532 if (length < 8) 533 goto err1; 534 535 if (atomic_wr(ibwr)->remote_addr & 0x7) 536 goto err1; 537 } 538 539 if (unlikely((ibwr->send_flags & IB_SEND_INLINE) && 540 (length > sq->max_inline))) 541 goto err1; 542 543 return 0; 544 545 err1: 546 return -EINVAL; 547 } 548 549 static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr, 550 const struct ib_send_wr *ibwr) 551 { 552 wr->wr_id = ibwr->wr_id; 553 wr->num_sge = ibwr->num_sge; 554 wr->opcode = ibwr->opcode; 555 wr->send_flags = ibwr->send_flags; 556 557 if (qp_type(qp) == IB_QPT_UD || 558 qp_type(qp) == IB_QPT_SMI || 559 qp_type(qp) == IB_QPT_GSI) { 560 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn; 561 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey; 562 if (qp_type(qp) == IB_QPT_GSI) 563 wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index; 564 if (wr->opcode == IB_WR_SEND_WITH_IMM) 565 wr->ex.imm_data = ibwr->ex.imm_data; 566 } else { 567 switch (wr->opcode) { 568 case IB_WR_RDMA_WRITE_WITH_IMM: 569 wr->ex.imm_data = ibwr->ex.imm_data; 570 /* fall through */ 571 case IB_WR_RDMA_READ: 572 case IB_WR_RDMA_WRITE: 573 wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr; 574 wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey; 575 break; 576 case IB_WR_SEND_WITH_IMM: 577 wr->ex.imm_data = ibwr->ex.imm_data; 578 break; 579 case IB_WR_SEND_WITH_INV: 580 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; 581 break; 582 case IB_WR_ATOMIC_CMP_AND_SWP: 583 case IB_WR_ATOMIC_FETCH_AND_ADD: 584 wr->wr.atomic.remote_addr = 585 atomic_wr(ibwr)->remote_addr; 586 wr->wr.atomic.compare_add = 587 atomic_wr(ibwr)->compare_add; 588 wr->wr.atomic.swap = atomic_wr(ibwr)->swap; 589 wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey; 590 break; 591 case IB_WR_LOCAL_INV: 592 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; 593 break; 594 case IB_WR_REG_MR: 595 wr->wr.reg.mr = reg_wr(ibwr)->mr; 596 wr->wr.reg.key = reg_wr(ibwr)->key; 597 wr->wr.reg.access = reg_wr(ibwr)->access; 598 break; 599 default: 600 break; 601 } 602 } 603 } 604 605 static int init_send_wqe(struct rxe_qp *qp, const struct ib_send_wr *ibwr, 606 unsigned int mask, unsigned int length, 607 struct rxe_send_wqe *wqe) 608 { 609 int num_sge = ibwr->num_sge; 610 struct ib_sge *sge; 611 int i; 612 u8 *p; 613 614 init_send_wr(qp, &wqe->wr, ibwr); 615 616 if (qp_type(qp) == IB_QPT_UD || 617 qp_type(qp) == IB_QPT_SMI || 618 qp_type(qp) == IB_QPT_GSI) 619 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av)); 620 621 if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) { 622 p = wqe->dma.inline_data; 623 624 sge = ibwr->sg_list; 625 for (i = 0; i < num_sge; i++, sge++) { 626 memcpy(p, (void *)(uintptr_t)sge->addr, 627 sge->length); 628 629 p += sge->length; 630 } 631 } else if (mask & WR_REG_MASK) { 632 wqe->mask = mask; 633 wqe->state = wqe_state_posted; 634 return 0; 635 } else 636 memcpy(wqe->dma.sge, ibwr->sg_list, 637 num_sge * sizeof(struct ib_sge)); 638 639 wqe->iova = mask & WR_ATOMIC_MASK ? atomic_wr(ibwr)->remote_addr : 640 mask & WR_READ_OR_WRITE_MASK ? rdma_wr(ibwr)->remote_addr : 0; 641 wqe->mask = mask; 642 wqe->dma.length = length; 643 wqe->dma.resid = length; 644 wqe->dma.num_sge = num_sge; 645 wqe->dma.cur_sge = 0; 646 wqe->dma.sge_offset = 0; 647 wqe->state = wqe_state_posted; 648 wqe->ssn = atomic_add_return(1, &qp->ssn); 649 650 return 0; 651 } 652 653 static int post_one_send(struct rxe_qp *qp, const struct ib_send_wr *ibwr, 654 unsigned int mask, u32 length) 655 { 656 int err; 657 struct rxe_sq *sq = &qp->sq; 658 struct rxe_send_wqe *send_wqe; 659 unsigned long flags; 660 661 err = validate_send_wr(qp, ibwr, mask, length); 662 if (err) 663 return err; 664 665 spin_lock_irqsave(&qp->sq.sq_lock, flags); 666 667 if (unlikely(queue_full(sq->queue))) { 668 err = -ENOMEM; 669 goto err1; 670 } 671 672 send_wqe = producer_addr(sq->queue); 673 674 err = init_send_wqe(qp, ibwr, mask, length, send_wqe); 675 if (unlikely(err)) 676 goto err1; 677 678 /* 679 * make sure all changes to the work queue are 680 * written before we update the producer pointer 681 */ 682 smp_wmb(); 683 684 advance_producer(sq->queue); 685 spin_unlock_irqrestore(&qp->sq.sq_lock, flags); 686 687 return 0; 688 689 err1: 690 spin_unlock_irqrestore(&qp->sq.sq_lock, flags); 691 return err; 692 } 693 694 static int rxe_post_send_kernel(struct rxe_qp *qp, const struct ib_send_wr *wr, 695 const struct ib_send_wr **bad_wr) 696 { 697 int err = 0; 698 unsigned int mask; 699 unsigned int length = 0; 700 int i; 701 702 while (wr) { 703 mask = wr_opcode_mask(wr->opcode, qp); 704 if (unlikely(!mask)) { 705 err = -EINVAL; 706 *bad_wr = wr; 707 break; 708 } 709 710 if (unlikely((wr->send_flags & IB_SEND_INLINE) && 711 !(mask & WR_INLINE_MASK))) { 712 err = -EINVAL; 713 *bad_wr = wr; 714 break; 715 } 716 717 length = 0; 718 for (i = 0; i < wr->num_sge; i++) 719 length += wr->sg_list[i].length; 720 721 err = post_one_send(qp, wr, mask, length); 722 723 if (err) { 724 *bad_wr = wr; 725 break; 726 } 727 wr = wr->next; 728 } 729 730 rxe_run_task(&qp->req.task, 1); 731 if (unlikely(qp->req.state == QP_STATE_ERROR)) 732 rxe_run_task(&qp->comp.task, 1); 733 734 return err; 735 } 736 737 static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 738 const struct ib_send_wr **bad_wr) 739 { 740 struct rxe_qp *qp = to_rqp(ibqp); 741 742 if (unlikely(!qp->valid)) { 743 *bad_wr = wr; 744 return -EINVAL; 745 } 746 747 if (unlikely(qp->req.state < QP_STATE_READY)) { 748 *bad_wr = wr; 749 return -EINVAL; 750 } 751 752 if (qp->is_user) { 753 /* Utilize process context to do protocol processing */ 754 rxe_run_task(&qp->req.task, 0); 755 return 0; 756 } else 757 return rxe_post_send_kernel(qp, wr, bad_wr); 758 } 759 760 static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 761 const struct ib_recv_wr **bad_wr) 762 { 763 int err = 0; 764 struct rxe_qp *qp = to_rqp(ibqp); 765 struct rxe_rq *rq = &qp->rq; 766 unsigned long flags; 767 768 if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) { 769 *bad_wr = wr; 770 err = -EINVAL; 771 goto err1; 772 } 773 774 if (unlikely(qp->srq)) { 775 *bad_wr = wr; 776 err = -EINVAL; 777 goto err1; 778 } 779 780 spin_lock_irqsave(&rq->producer_lock, flags); 781 782 while (wr) { 783 err = post_one_recv(rq, wr); 784 if (unlikely(err)) { 785 *bad_wr = wr; 786 break; 787 } 788 wr = wr->next; 789 } 790 791 spin_unlock_irqrestore(&rq->producer_lock, flags); 792 793 if (qp->resp.state == QP_STATE_ERROR) 794 rxe_run_task(&qp->resp.task, 1); 795 796 err1: 797 return err; 798 } 799 800 static struct ib_cq *rxe_create_cq(struct ib_device *dev, 801 const struct ib_cq_init_attr *attr, 802 struct ib_ucontext *context, 803 struct ib_udata *udata) 804 { 805 int err; 806 struct rxe_dev *rxe = to_rdev(dev); 807 struct rxe_cq *cq; 808 struct rxe_create_cq_resp __user *uresp = NULL; 809 810 if (udata) { 811 if (udata->outlen < sizeof(*uresp)) 812 return ERR_PTR(-EINVAL); 813 uresp = udata->outbuf; 814 } 815 816 if (attr->flags) 817 return ERR_PTR(-EINVAL); 818 819 err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector); 820 if (err) 821 goto err1; 822 823 cq = rxe_alloc(&rxe->cq_pool); 824 if (!cq) { 825 err = -ENOMEM; 826 goto err1; 827 } 828 829 err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector, 830 context, uresp); 831 if (err) 832 goto err2; 833 834 return &cq->ibcq; 835 836 err2: 837 rxe_drop_ref(cq); 838 err1: 839 return ERR_PTR(err); 840 } 841 842 static int rxe_destroy_cq(struct ib_cq *ibcq) 843 { 844 struct rxe_cq *cq = to_rcq(ibcq); 845 846 rxe_cq_disable(cq); 847 848 rxe_drop_ref(cq); 849 return 0; 850 } 851 852 static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata) 853 { 854 int err; 855 struct rxe_cq *cq = to_rcq(ibcq); 856 struct rxe_dev *rxe = to_rdev(ibcq->device); 857 struct rxe_resize_cq_resp __user *uresp = NULL; 858 859 if (udata) { 860 if (udata->outlen < sizeof(*uresp)) 861 return -EINVAL; 862 uresp = udata->outbuf; 863 } 864 865 err = rxe_cq_chk_attr(rxe, cq, cqe, 0); 866 if (err) 867 goto err1; 868 869 err = rxe_cq_resize_queue(cq, cqe, uresp); 870 if (err) 871 goto err1; 872 873 return 0; 874 875 err1: 876 return err; 877 } 878 879 static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) 880 { 881 int i; 882 struct rxe_cq *cq = to_rcq(ibcq); 883 struct rxe_cqe *cqe; 884 unsigned long flags; 885 886 spin_lock_irqsave(&cq->cq_lock, flags); 887 for (i = 0; i < num_entries; i++) { 888 cqe = queue_head(cq->queue); 889 if (!cqe) 890 break; 891 892 memcpy(wc++, &cqe->ibwc, sizeof(*wc)); 893 advance_consumer(cq->queue); 894 } 895 spin_unlock_irqrestore(&cq->cq_lock, flags); 896 897 return i; 898 } 899 900 static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt) 901 { 902 struct rxe_cq *cq = to_rcq(ibcq); 903 int count = queue_count(cq->queue); 904 905 return (count > wc_cnt) ? wc_cnt : count; 906 } 907 908 static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) 909 { 910 struct rxe_cq *cq = to_rcq(ibcq); 911 unsigned long irq_flags; 912 int ret = 0; 913 914 spin_lock_irqsave(&cq->cq_lock, irq_flags); 915 if (cq->notify != IB_CQ_NEXT_COMP) 916 cq->notify = flags & IB_CQ_SOLICITED_MASK; 917 918 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !queue_empty(cq->queue)) 919 ret = 1; 920 921 spin_unlock_irqrestore(&cq->cq_lock, irq_flags); 922 923 return ret; 924 } 925 926 static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access) 927 { 928 struct rxe_dev *rxe = to_rdev(ibpd->device); 929 struct rxe_pd *pd = to_rpd(ibpd); 930 struct rxe_mem *mr; 931 int err; 932 933 mr = rxe_alloc(&rxe->mr_pool); 934 if (!mr) { 935 err = -ENOMEM; 936 goto err1; 937 } 938 939 rxe_add_index(mr); 940 941 rxe_add_ref(pd); 942 943 err = rxe_mem_init_dma(pd, access, mr); 944 if (err) 945 goto err2; 946 947 return &mr->ibmr; 948 949 err2: 950 rxe_drop_ref(pd); 951 rxe_drop_index(mr); 952 rxe_drop_ref(mr); 953 err1: 954 return ERR_PTR(err); 955 } 956 957 static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd, 958 u64 start, 959 u64 length, 960 u64 iova, 961 int access, struct ib_udata *udata) 962 { 963 int err; 964 struct rxe_dev *rxe = to_rdev(ibpd->device); 965 struct rxe_pd *pd = to_rpd(ibpd); 966 struct rxe_mem *mr; 967 968 mr = rxe_alloc(&rxe->mr_pool); 969 if (!mr) { 970 err = -ENOMEM; 971 goto err2; 972 } 973 974 rxe_add_index(mr); 975 976 rxe_add_ref(pd); 977 978 err = rxe_mem_init_user(pd, start, length, iova, 979 access, udata, mr); 980 if (err) 981 goto err3; 982 983 return &mr->ibmr; 984 985 err3: 986 rxe_drop_ref(pd); 987 rxe_drop_index(mr); 988 rxe_drop_ref(mr); 989 err2: 990 return ERR_PTR(err); 991 } 992 993 static int rxe_dereg_mr(struct ib_mr *ibmr) 994 { 995 struct rxe_mem *mr = to_rmr(ibmr); 996 997 mr->state = RXE_MEM_STATE_ZOMBIE; 998 rxe_drop_ref(mr->pd); 999 rxe_drop_index(mr); 1000 rxe_drop_ref(mr); 1001 return 0; 1002 } 1003 1004 static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, 1005 enum ib_mr_type mr_type, 1006 u32 max_num_sg) 1007 { 1008 struct rxe_dev *rxe = to_rdev(ibpd->device); 1009 struct rxe_pd *pd = to_rpd(ibpd); 1010 struct rxe_mem *mr; 1011 int err; 1012 1013 if (mr_type != IB_MR_TYPE_MEM_REG) 1014 return ERR_PTR(-EINVAL); 1015 1016 mr = rxe_alloc(&rxe->mr_pool); 1017 if (!mr) { 1018 err = -ENOMEM; 1019 goto err1; 1020 } 1021 1022 rxe_add_index(mr); 1023 1024 rxe_add_ref(pd); 1025 1026 err = rxe_mem_init_fast(pd, max_num_sg, mr); 1027 if (err) 1028 goto err2; 1029 1030 return &mr->ibmr; 1031 1032 err2: 1033 rxe_drop_ref(pd); 1034 rxe_drop_index(mr); 1035 rxe_drop_ref(mr); 1036 err1: 1037 return ERR_PTR(err); 1038 } 1039 1040 static int rxe_set_page(struct ib_mr *ibmr, u64 addr) 1041 { 1042 struct rxe_mem *mr = to_rmr(ibmr); 1043 struct rxe_map *map; 1044 struct rxe_phys_buf *buf; 1045 1046 if (unlikely(mr->nbuf == mr->num_buf)) 1047 return -ENOMEM; 1048 1049 map = mr->map[mr->nbuf / RXE_BUF_PER_MAP]; 1050 buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP]; 1051 1052 buf->addr = addr; 1053 buf->size = ibmr->page_size; 1054 mr->nbuf++; 1055 1056 return 0; 1057 } 1058 1059 static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, 1060 int sg_nents, unsigned int *sg_offset) 1061 { 1062 struct rxe_mem *mr = to_rmr(ibmr); 1063 int n; 1064 1065 mr->nbuf = 0; 1066 1067 n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page); 1068 1069 mr->va = ibmr->iova; 1070 mr->iova = ibmr->iova; 1071 mr->length = ibmr->length; 1072 mr->page_shift = ilog2(ibmr->page_size); 1073 mr->page_mask = ibmr->page_size - 1; 1074 mr->offset = mr->iova & mr->page_mask; 1075 1076 return n; 1077 } 1078 1079 static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid) 1080 { 1081 int err; 1082 struct rxe_dev *rxe = to_rdev(ibqp->device); 1083 struct rxe_qp *qp = to_rqp(ibqp); 1084 struct rxe_mc_grp *grp; 1085 1086 /* takes a ref on grp if successful */ 1087 err = rxe_mcast_get_grp(rxe, mgid, &grp); 1088 if (err) 1089 return err; 1090 1091 err = rxe_mcast_add_grp_elem(rxe, qp, grp); 1092 1093 rxe_drop_ref(grp); 1094 return err; 1095 } 1096 1097 static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid) 1098 { 1099 struct rxe_dev *rxe = to_rdev(ibqp->device); 1100 struct rxe_qp *qp = to_rqp(ibqp); 1101 1102 return rxe_mcast_drop_grp_elem(rxe, qp, mgid); 1103 } 1104 1105 static ssize_t parent_show(struct device *device, 1106 struct device_attribute *attr, char *buf) 1107 { 1108 struct rxe_dev *rxe = 1109 rdma_device_to_drv_device(device, struct rxe_dev, ib_dev); 1110 1111 return snprintf(buf, 16, "%s\n", rxe_parent_name(rxe, 1)); 1112 } 1113 1114 static DEVICE_ATTR_RO(parent); 1115 1116 static struct attribute *rxe_dev_attributes[] = { 1117 &dev_attr_parent.attr, 1118 NULL 1119 }; 1120 1121 static const struct attribute_group rxe_attr_group = { 1122 .attrs = rxe_dev_attributes, 1123 }; 1124 1125 static int rxe_enable_driver(struct ib_device *ib_dev) 1126 { 1127 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev); 1128 1129 rxe_set_port_state(rxe); 1130 dev_info(&rxe->ib_dev.dev, "added %s\n", netdev_name(rxe->ndev)); 1131 return 0; 1132 } 1133 1134 static const struct ib_device_ops rxe_dev_ops = { 1135 .alloc_hw_stats = rxe_ib_alloc_hw_stats, 1136 .alloc_mr = rxe_alloc_mr, 1137 .alloc_pd = rxe_alloc_pd, 1138 .alloc_ucontext = rxe_alloc_ucontext, 1139 .attach_mcast = rxe_attach_mcast, 1140 .create_ah = rxe_create_ah, 1141 .create_cq = rxe_create_cq, 1142 .create_qp = rxe_create_qp, 1143 .create_srq = rxe_create_srq, 1144 .dealloc_driver = rxe_dealloc, 1145 .dealloc_pd = rxe_dealloc_pd, 1146 .dealloc_ucontext = rxe_dealloc_ucontext, 1147 .dereg_mr = rxe_dereg_mr, 1148 .destroy_ah = rxe_destroy_ah, 1149 .destroy_cq = rxe_destroy_cq, 1150 .destroy_qp = rxe_destroy_qp, 1151 .destroy_srq = rxe_destroy_srq, 1152 .detach_mcast = rxe_detach_mcast, 1153 .enable_driver = rxe_enable_driver, 1154 .get_dma_mr = rxe_get_dma_mr, 1155 .get_hw_stats = rxe_ib_get_hw_stats, 1156 .get_link_layer = rxe_get_link_layer, 1157 .get_port_immutable = rxe_port_immutable, 1158 .map_mr_sg = rxe_map_mr_sg, 1159 .mmap = rxe_mmap, 1160 .modify_ah = rxe_modify_ah, 1161 .modify_device = rxe_modify_device, 1162 .modify_port = rxe_modify_port, 1163 .modify_qp = rxe_modify_qp, 1164 .modify_srq = rxe_modify_srq, 1165 .peek_cq = rxe_peek_cq, 1166 .poll_cq = rxe_poll_cq, 1167 .post_recv = rxe_post_recv, 1168 .post_send = rxe_post_send, 1169 .post_srq_recv = rxe_post_srq_recv, 1170 .query_ah = rxe_query_ah, 1171 .query_device = rxe_query_device, 1172 .query_pkey = rxe_query_pkey, 1173 .query_port = rxe_query_port, 1174 .query_qp = rxe_query_qp, 1175 .query_srq = rxe_query_srq, 1176 .reg_user_mr = rxe_reg_user_mr, 1177 .req_notify_cq = rxe_req_notify_cq, 1178 .resize_cq = rxe_resize_cq, 1179 INIT_RDMA_OBJ_SIZE(ib_pd, rxe_pd, ibpd), 1180 INIT_RDMA_OBJ_SIZE(ib_ucontext, rxe_ucontext, ibuc), 1181 }; 1182 1183 int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name) 1184 { 1185 int err; 1186 struct ib_device *dev = &rxe->ib_dev; 1187 struct crypto_shash *tfm; 1188 1189 strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc)); 1190 1191 dev->owner = THIS_MODULE; 1192 dev->node_type = RDMA_NODE_IB_CA; 1193 dev->phys_port_cnt = 1; 1194 dev->num_comp_vectors = num_possible_cpus(); 1195 dev->dev.parent = rxe_dma_device(rxe); 1196 dev->local_dma_lkey = 0; 1197 addrconf_addr_eui48((unsigned char *)&dev->node_guid, 1198 rxe->ndev->dev_addr); 1199 dev->dev.dma_ops = &dma_virt_ops; 1200 dma_coerce_mask_and_coherent(&dev->dev, 1201 dma_get_required_mask(&dev->dev)); 1202 1203 dev->uverbs_abi_ver = RXE_UVERBS_ABI_VERSION; 1204 dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT) 1205 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) 1206 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE) 1207 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT) 1208 | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD) 1209 | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD) 1210 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ) 1211 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ) 1212 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ) 1213 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ) 1214 | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV) 1215 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP) 1216 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP) 1217 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP) 1218 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP) 1219 | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND) 1220 | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV) 1221 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ) 1222 | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ) 1223 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ) 1224 | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ) 1225 | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ) 1226 | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) 1227 | BIT_ULL(IB_USER_VERBS_CMD_REG_MR) 1228 | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR) 1229 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH) 1230 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH) 1231 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH) 1232 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH) 1233 | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST) 1234 | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST) 1235 ; 1236 1237 ib_set_device_ops(dev, &rxe_dev_ops); 1238 err = ib_device_set_netdev(&rxe->ib_dev, rxe->ndev, 1); 1239 if (err) 1240 return err; 1241 1242 tfm = crypto_alloc_shash("crc32", 0, 0); 1243 if (IS_ERR(tfm)) { 1244 pr_err("failed to allocate crc algorithm err:%ld\n", 1245 PTR_ERR(tfm)); 1246 return PTR_ERR(tfm); 1247 } 1248 rxe->tfm = tfm; 1249 1250 rdma_set_device_sysfs_group(dev, &rxe_attr_group); 1251 dev->driver_id = RDMA_DRIVER_RXE; 1252 err = ib_register_device(dev, ibdev_name); 1253 if (err) 1254 pr_warn("%s failed with error %d\n", __func__, err); 1255 1256 /* 1257 * Note that rxe may be invalid at this point if another thread 1258 * unregistered it. 1259 */ 1260 return err; 1261 } 1262