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