1 /* 2 * Copyright (c) 2012-2016 VMware, Inc. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of EITHER the GNU General Public License 6 * version 2 as published by the Free Software Foundation or the BSD 7 * 2-Clause License. This program is distributed in the hope that it 8 * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED 9 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 10 * See the GNU General Public License version 2 for more details at 11 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program available in the file COPYING in the main 15 * directory of this source tree. 16 * 17 * The BSD 2-Clause License 18 * 19 * Redistribution and use in source and binary forms, with or 20 * without modification, are permitted provided that the following 21 * conditions are met: 22 * 23 * - Redistributions of source code must retain the above 24 * copyright notice, this list of conditions and the following 25 * disclaimer. 26 * 27 * - Redistributions in binary form must reproduce the above 28 * copyright notice, this list of conditions and the following 29 * disclaimer in the documentation and/or other materials 30 * provided with the distribution. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 35 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 36 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 37 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 38 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 39 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 41 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 42 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 43 * OF THE POSSIBILITY OF SUCH DAMAGE. 44 */ 45 46 #include <asm/page.h> 47 #include <linux/io.h> 48 #include <linux/wait.h> 49 #include <rdma/ib_addr.h> 50 #include <rdma/ib_smi.h> 51 #include <rdma/ib_user_verbs.h> 52 53 #include "pvrdma.h" 54 55 static void __pvrdma_destroy_qp(struct pvrdma_dev *dev, 56 struct pvrdma_qp *qp); 57 58 static inline void get_cqs(struct pvrdma_qp *qp, struct pvrdma_cq **send_cq, 59 struct pvrdma_cq **recv_cq) 60 { 61 *send_cq = to_vcq(qp->ibqp.send_cq); 62 *recv_cq = to_vcq(qp->ibqp.recv_cq); 63 } 64 65 static void pvrdma_lock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq, 66 unsigned long *scq_flags, 67 unsigned long *rcq_flags) 68 __acquires(scq->cq_lock) __acquires(rcq->cq_lock) 69 { 70 if (scq == rcq) { 71 spin_lock_irqsave(&scq->cq_lock, *scq_flags); 72 __acquire(rcq->cq_lock); 73 } else if (scq->cq_handle < rcq->cq_handle) { 74 spin_lock_irqsave(&scq->cq_lock, *scq_flags); 75 spin_lock_irqsave_nested(&rcq->cq_lock, *rcq_flags, 76 SINGLE_DEPTH_NESTING); 77 } else { 78 spin_lock_irqsave(&rcq->cq_lock, *rcq_flags); 79 spin_lock_irqsave_nested(&scq->cq_lock, *scq_flags, 80 SINGLE_DEPTH_NESTING); 81 } 82 } 83 84 static void pvrdma_unlock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq, 85 unsigned long *scq_flags, 86 unsigned long *rcq_flags) 87 __releases(scq->cq_lock) __releases(rcq->cq_lock) 88 { 89 if (scq == rcq) { 90 __release(rcq->cq_lock); 91 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags); 92 } else if (scq->cq_handle < rcq->cq_handle) { 93 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags); 94 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags); 95 } else { 96 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags); 97 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags); 98 } 99 } 100 101 static void pvrdma_reset_qp(struct pvrdma_qp *qp) 102 { 103 struct pvrdma_cq *scq, *rcq; 104 unsigned long scq_flags, rcq_flags; 105 106 /* Clean up cqes */ 107 get_cqs(qp, &scq, &rcq); 108 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags); 109 110 _pvrdma_flush_cqe(qp, scq); 111 if (scq != rcq) 112 _pvrdma_flush_cqe(qp, rcq); 113 114 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags); 115 116 /* 117 * Reset queuepair. The checks are because usermode queuepairs won't 118 * have kernel ringstates. 119 */ 120 if (qp->rq.ring) { 121 atomic_set(&qp->rq.ring->cons_head, 0); 122 atomic_set(&qp->rq.ring->prod_tail, 0); 123 } 124 if (qp->sq.ring) { 125 atomic_set(&qp->sq.ring->cons_head, 0); 126 atomic_set(&qp->sq.ring->prod_tail, 0); 127 } 128 } 129 130 static int pvrdma_set_rq_size(struct pvrdma_dev *dev, 131 struct ib_qp_cap *req_cap, 132 struct pvrdma_qp *qp) 133 { 134 if (req_cap->max_recv_wr > dev->dsr->caps.max_qp_wr || 135 req_cap->max_recv_sge > dev->dsr->caps.max_sge) { 136 dev_warn(&dev->pdev->dev, "recv queue size invalid\n"); 137 return -EINVAL; 138 } 139 140 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_recv_wr)); 141 qp->rq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_recv_sge)); 142 143 /* Write back */ 144 req_cap->max_recv_wr = qp->rq.wqe_cnt; 145 req_cap->max_recv_sge = qp->rq.max_sg; 146 147 qp->rq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_rq_wqe_hdr) + 148 sizeof(struct pvrdma_sge) * 149 qp->rq.max_sg); 150 qp->npages_recv = (qp->rq.wqe_cnt * qp->rq.wqe_size + PAGE_SIZE - 1) / 151 PAGE_SIZE; 152 153 return 0; 154 } 155 156 static int pvrdma_set_sq_size(struct pvrdma_dev *dev, struct ib_qp_cap *req_cap, 157 struct pvrdma_qp *qp) 158 { 159 if (req_cap->max_send_wr > dev->dsr->caps.max_qp_wr || 160 req_cap->max_send_sge > dev->dsr->caps.max_sge) { 161 dev_warn(&dev->pdev->dev, "send queue size invalid\n"); 162 return -EINVAL; 163 } 164 165 qp->sq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_send_wr)); 166 qp->sq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_send_sge)); 167 168 /* Write back */ 169 req_cap->max_send_wr = qp->sq.wqe_cnt; 170 req_cap->max_send_sge = qp->sq.max_sg; 171 172 qp->sq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_sq_wqe_hdr) + 173 sizeof(struct pvrdma_sge) * 174 qp->sq.max_sg); 175 /* Note: one extra page for the header. */ 176 qp->npages_send = PVRDMA_QP_NUM_HEADER_PAGES + 177 (qp->sq.wqe_cnt * qp->sq.wqe_size + PAGE_SIZE - 1) / 178 PAGE_SIZE; 179 180 return 0; 181 } 182 183 /** 184 * pvrdma_create_qp - create queue pair 185 * @pd: protection domain 186 * @init_attr: queue pair attributes 187 * @udata: user data 188 * 189 * @return: the ib_qp pointer on success, otherwise returns an errno. 190 */ 191 struct ib_qp *pvrdma_create_qp(struct ib_pd *pd, 192 struct ib_qp_init_attr *init_attr, 193 struct ib_udata *udata) 194 { 195 struct pvrdma_qp *qp = NULL; 196 struct pvrdma_dev *dev = to_vdev(pd->device); 197 union pvrdma_cmd_req req; 198 union pvrdma_cmd_resp rsp; 199 struct pvrdma_cmd_create_qp *cmd = &req.create_qp; 200 struct pvrdma_cmd_create_qp_resp *resp = &rsp.create_qp_resp; 201 struct pvrdma_cmd_create_qp_resp_v2 *resp_v2 = &rsp.create_qp_resp_v2; 202 struct pvrdma_create_qp ucmd; 203 struct pvrdma_create_qp_resp qp_resp = {}; 204 unsigned long flags; 205 int ret; 206 bool is_srq = !!init_attr->srq; 207 208 if (init_attr->create_flags) { 209 dev_warn(&dev->pdev->dev, 210 "invalid create queuepair flags %#x\n", 211 init_attr->create_flags); 212 return ERR_PTR(-EINVAL); 213 } 214 215 if (init_attr->qp_type != IB_QPT_RC && 216 init_attr->qp_type != IB_QPT_UD && 217 init_attr->qp_type != IB_QPT_GSI) { 218 dev_warn(&dev->pdev->dev, "queuepair type %d not supported\n", 219 init_attr->qp_type); 220 return ERR_PTR(-EINVAL); 221 } 222 223 if (is_srq && !dev->dsr->caps.max_srq) { 224 dev_warn(&dev->pdev->dev, 225 "SRQs not supported by device\n"); 226 return ERR_PTR(-EINVAL); 227 } 228 229 if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp)) 230 return ERR_PTR(-ENOMEM); 231 232 switch (init_attr->qp_type) { 233 case IB_QPT_GSI: 234 if (init_attr->port_num == 0 || 235 init_attr->port_num > pd->device->phys_port_cnt || 236 udata) { 237 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n"); 238 ret = -EINVAL; 239 goto err_qp; 240 } 241 /* fall through */ 242 case IB_QPT_RC: 243 case IB_QPT_UD: 244 qp = kzalloc(sizeof(*qp), GFP_KERNEL); 245 if (!qp) { 246 ret = -ENOMEM; 247 goto err_qp; 248 } 249 250 spin_lock_init(&qp->sq.lock); 251 spin_lock_init(&qp->rq.lock); 252 mutex_init(&qp->mutex); 253 refcount_set(&qp->refcnt, 1); 254 init_completion(&qp->free); 255 256 qp->state = IB_QPS_RESET; 257 qp->is_kernel = !udata; 258 259 if (!qp->is_kernel) { 260 dev_dbg(&dev->pdev->dev, 261 "create queuepair from user space\n"); 262 263 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) { 264 ret = -EFAULT; 265 goto err_qp; 266 } 267 268 /* Userspace supports qpn and qp handles? */ 269 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION && 270 udata->outlen < sizeof(qp_resp)) { 271 dev_warn(&dev->pdev->dev, 272 "create queuepair not supported\n"); 273 ret = -EOPNOTSUPP; 274 goto err_qp; 275 } 276 277 if (!is_srq) { 278 /* set qp->sq.wqe_cnt, shift, buf_size.. */ 279 qp->rumem = ib_umem_get(udata, ucmd.rbuf_addr, 280 ucmd.rbuf_size, 0); 281 if (IS_ERR(qp->rumem)) { 282 ret = PTR_ERR(qp->rumem); 283 goto err_qp; 284 } 285 qp->srq = NULL; 286 } else { 287 qp->rumem = NULL; 288 qp->srq = to_vsrq(init_attr->srq); 289 } 290 291 qp->sumem = ib_umem_get(udata, ucmd.sbuf_addr, 292 ucmd.sbuf_size, 0); 293 if (IS_ERR(qp->sumem)) { 294 if (!is_srq) 295 ib_umem_release(qp->rumem); 296 ret = PTR_ERR(qp->sumem); 297 goto err_qp; 298 } 299 300 qp->npages_send = ib_umem_page_count(qp->sumem); 301 if (!is_srq) 302 qp->npages_recv = ib_umem_page_count(qp->rumem); 303 else 304 qp->npages_recv = 0; 305 qp->npages = qp->npages_send + qp->npages_recv; 306 } else { 307 ret = pvrdma_set_sq_size(to_vdev(pd->device), 308 &init_attr->cap, qp); 309 if (ret) 310 goto err_qp; 311 312 ret = pvrdma_set_rq_size(to_vdev(pd->device), 313 &init_attr->cap, qp); 314 if (ret) 315 goto err_qp; 316 317 qp->npages = qp->npages_send + qp->npages_recv; 318 319 /* Skip header page. */ 320 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE; 321 322 /* Recv queue pages are after send pages. */ 323 qp->rq.offset = qp->npages_send * PAGE_SIZE; 324 } 325 326 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) { 327 dev_warn(&dev->pdev->dev, 328 "overflow pages in queuepair\n"); 329 ret = -EINVAL; 330 goto err_umem; 331 } 332 333 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages, 334 qp->is_kernel); 335 if (ret) { 336 dev_warn(&dev->pdev->dev, 337 "could not allocate page directory\n"); 338 goto err_umem; 339 } 340 341 if (!qp->is_kernel) { 342 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0); 343 if (!is_srq) 344 pvrdma_page_dir_insert_umem(&qp->pdir, 345 qp->rumem, 346 qp->npages_send); 347 } else { 348 /* Ring state is always the first page. */ 349 qp->sq.ring = qp->pdir.pages[0]; 350 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1]; 351 } 352 break; 353 default: 354 ret = -EINVAL; 355 goto err_qp; 356 } 357 358 /* Not supported */ 359 init_attr->cap.max_inline_data = 0; 360 361 memset(cmd, 0, sizeof(*cmd)); 362 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP; 363 cmd->pd_handle = to_vpd(pd)->pd_handle; 364 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle; 365 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle; 366 if (is_srq) 367 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle; 368 else 369 cmd->srq_handle = 0; 370 cmd->max_send_wr = init_attr->cap.max_send_wr; 371 cmd->max_recv_wr = init_attr->cap.max_recv_wr; 372 cmd->max_send_sge = init_attr->cap.max_send_sge; 373 cmd->max_recv_sge = init_attr->cap.max_recv_sge; 374 cmd->max_inline_data = init_attr->cap.max_inline_data; 375 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0; 376 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type); 377 cmd->is_srq = is_srq; 378 cmd->lkey = 0; 379 cmd->access_flags = IB_ACCESS_LOCAL_WRITE; 380 cmd->total_chunks = qp->npages; 381 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES; 382 cmd->pdir_dma = qp->pdir.dir_dma; 383 384 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n", 385 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge, 386 cmd->max_recv_sge); 387 388 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP); 389 if (ret < 0) { 390 dev_warn(&dev->pdev->dev, 391 "could not create queuepair, error: %d\n", ret); 392 goto err_pdir; 393 } 394 395 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */ 396 qp->port = init_attr->port_num; 397 398 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION) { 399 qp->ibqp.qp_num = resp_v2->qpn; 400 qp->qp_handle = resp_v2->qp_handle; 401 } else { 402 qp->ibqp.qp_num = resp->qpn; 403 qp->qp_handle = resp->qpn; 404 } 405 406 spin_lock_irqsave(&dev->qp_tbl_lock, flags); 407 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp; 408 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); 409 410 if (udata) { 411 qp_resp.qpn = qp->ibqp.qp_num; 412 qp_resp.qp_handle = qp->qp_handle; 413 414 if (ib_copy_to_udata(udata, &qp_resp, 415 min(udata->outlen, sizeof(qp_resp)))) { 416 dev_warn(&dev->pdev->dev, 417 "failed to copy back udata\n"); 418 __pvrdma_destroy_qp(dev, qp); 419 return ERR_PTR(-EINVAL); 420 } 421 } 422 423 return &qp->ibqp; 424 425 err_pdir: 426 pvrdma_page_dir_cleanup(dev, &qp->pdir); 427 err_umem: 428 ib_umem_release(qp->rumem); 429 ib_umem_release(qp->sumem); 430 err_qp: 431 kfree(qp); 432 atomic_dec(&dev->num_qps); 433 434 return ERR_PTR(ret); 435 } 436 437 static void _pvrdma_free_qp(struct pvrdma_qp *qp) 438 { 439 unsigned long flags; 440 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device); 441 442 spin_lock_irqsave(&dev->qp_tbl_lock, flags); 443 dev->qp_tbl[qp->qp_handle] = NULL; 444 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); 445 446 if (refcount_dec_and_test(&qp->refcnt)) 447 complete(&qp->free); 448 wait_for_completion(&qp->free); 449 450 ib_umem_release(qp->rumem); 451 ib_umem_release(qp->sumem); 452 453 pvrdma_page_dir_cleanup(dev, &qp->pdir); 454 455 kfree(qp); 456 457 atomic_dec(&dev->num_qps); 458 } 459 460 static void pvrdma_free_qp(struct pvrdma_qp *qp) 461 { 462 struct pvrdma_cq *scq; 463 struct pvrdma_cq *rcq; 464 unsigned long scq_flags, rcq_flags; 465 466 /* In case cq is polling */ 467 get_cqs(qp, &scq, &rcq); 468 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags); 469 470 _pvrdma_flush_cqe(qp, scq); 471 if (scq != rcq) 472 _pvrdma_flush_cqe(qp, rcq); 473 474 /* 475 * We're now unlocking the CQs before clearing out the qp handle this 476 * should still be safe. We have destroyed the backend QP and flushed 477 * the CQEs so there should be no other completions for this QP. 478 */ 479 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags); 480 481 _pvrdma_free_qp(qp); 482 } 483 484 static inline void _pvrdma_destroy_qp_work(struct pvrdma_dev *dev, 485 u32 qp_handle) 486 { 487 union pvrdma_cmd_req req; 488 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp; 489 int ret; 490 491 memset(cmd, 0, sizeof(*cmd)); 492 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP; 493 cmd->qp_handle = qp_handle; 494 495 ret = pvrdma_cmd_post(dev, &req, NULL, 0); 496 if (ret < 0) 497 dev_warn(&dev->pdev->dev, 498 "destroy queuepair failed, error: %d\n", ret); 499 } 500 501 /** 502 * pvrdma_destroy_qp - destroy a queue pair 503 * @qp: the queue pair to destroy 504 * @udata: user data or null for kernel object 505 * 506 * @return: always 0. 507 */ 508 int pvrdma_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 509 { 510 struct pvrdma_qp *vqp = to_vqp(qp); 511 512 _pvrdma_destroy_qp_work(to_vdev(qp->device), vqp->qp_handle); 513 pvrdma_free_qp(vqp); 514 515 return 0; 516 } 517 518 static void __pvrdma_destroy_qp(struct pvrdma_dev *dev, 519 struct pvrdma_qp *qp) 520 { 521 _pvrdma_destroy_qp_work(dev, qp->qp_handle); 522 _pvrdma_free_qp(qp); 523 } 524 525 /** 526 * pvrdma_modify_qp - modify queue pair attributes 527 * @ibqp: the queue pair 528 * @attr: the new queue pair's attributes 529 * @attr_mask: attributes mask 530 * @udata: user data 531 * 532 * @returns 0 on success, otherwise returns an errno. 533 */ 534 int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 535 int attr_mask, struct ib_udata *udata) 536 { 537 struct pvrdma_dev *dev = to_vdev(ibqp->device); 538 struct pvrdma_qp *qp = to_vqp(ibqp); 539 union pvrdma_cmd_req req; 540 union pvrdma_cmd_resp rsp; 541 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp; 542 enum ib_qp_state cur_state, next_state; 543 int ret; 544 545 /* Sanity checking. Should need lock here */ 546 mutex_lock(&qp->mutex); 547 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state : 548 qp->state; 549 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state; 550 551 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type, 552 attr_mask)) { 553 ret = -EINVAL; 554 goto out; 555 } 556 557 if (attr_mask & IB_QP_PORT) { 558 if (attr->port_num == 0 || 559 attr->port_num > ibqp->device->phys_port_cnt) { 560 ret = -EINVAL; 561 goto out; 562 } 563 } 564 565 if (attr_mask & IB_QP_MIN_RNR_TIMER) { 566 if (attr->min_rnr_timer > 31) { 567 ret = -EINVAL; 568 goto out; 569 } 570 } 571 572 if (attr_mask & IB_QP_PKEY_INDEX) { 573 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) { 574 ret = -EINVAL; 575 goto out; 576 } 577 } 578 579 if (attr_mask & IB_QP_QKEY) 580 qp->qkey = attr->qkey; 581 582 if (cur_state == next_state && cur_state == IB_QPS_RESET) { 583 ret = 0; 584 goto out; 585 } 586 587 qp->state = next_state; 588 memset(cmd, 0, sizeof(*cmd)); 589 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP; 590 cmd->qp_handle = qp->qp_handle; 591 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask); 592 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state); 593 cmd->attrs.cur_qp_state = 594 ib_qp_state_to_pvrdma(attr->cur_qp_state); 595 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu); 596 cmd->attrs.path_mig_state = 597 ib_mig_state_to_pvrdma(attr->path_mig_state); 598 cmd->attrs.qkey = attr->qkey; 599 cmd->attrs.rq_psn = attr->rq_psn; 600 cmd->attrs.sq_psn = attr->sq_psn; 601 cmd->attrs.dest_qp_num = attr->dest_qp_num; 602 cmd->attrs.qp_access_flags = 603 ib_access_flags_to_pvrdma(attr->qp_access_flags); 604 cmd->attrs.pkey_index = attr->pkey_index; 605 cmd->attrs.alt_pkey_index = attr->alt_pkey_index; 606 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify; 607 cmd->attrs.sq_draining = attr->sq_draining; 608 cmd->attrs.max_rd_atomic = attr->max_rd_atomic; 609 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic; 610 cmd->attrs.min_rnr_timer = attr->min_rnr_timer; 611 cmd->attrs.port_num = attr->port_num; 612 cmd->attrs.timeout = attr->timeout; 613 cmd->attrs.retry_cnt = attr->retry_cnt; 614 cmd->attrs.rnr_retry = attr->rnr_retry; 615 cmd->attrs.alt_port_num = attr->alt_port_num; 616 cmd->attrs.alt_timeout = attr->alt_timeout; 617 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap); 618 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr); 619 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr); 620 621 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP); 622 if (ret < 0) { 623 dev_warn(&dev->pdev->dev, 624 "could not modify queuepair, error: %d\n", ret); 625 } else if (rsp.hdr.err > 0) { 626 dev_warn(&dev->pdev->dev, 627 "cannot modify queuepair, error: %d\n", rsp.hdr.err); 628 ret = -EINVAL; 629 } 630 631 if (ret == 0 && next_state == IB_QPS_RESET) 632 pvrdma_reset_qp(qp); 633 634 out: 635 mutex_unlock(&qp->mutex); 636 637 return ret; 638 } 639 640 static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n) 641 { 642 return pvrdma_page_dir_get_ptr(&qp->pdir, 643 qp->sq.offset + n * qp->sq.wqe_size); 644 } 645 646 static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n) 647 { 648 return pvrdma_page_dir_get_ptr(&qp->pdir, 649 qp->rq.offset + n * qp->rq.wqe_size); 650 } 651 652 static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr, 653 const struct ib_reg_wr *wr) 654 { 655 struct pvrdma_user_mr *mr = to_vmr(wr->mr); 656 657 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova; 658 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma; 659 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift; 660 wqe_hdr->wr.fast_reg.page_list_len = mr->npages; 661 wqe_hdr->wr.fast_reg.length = mr->ibmr.length; 662 wqe_hdr->wr.fast_reg.access_flags = wr->access; 663 wqe_hdr->wr.fast_reg.rkey = wr->key; 664 665 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages, 666 mr->npages); 667 } 668 669 /** 670 * pvrdma_post_send - post send work request entries on a QP 671 * @ibqp: the QP 672 * @wr: work request list to post 673 * @bad_wr: the first bad WR returned 674 * 675 * @return: 0 on success, otherwise errno returned. 676 */ 677 int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 678 const struct ib_send_wr **bad_wr) 679 { 680 struct pvrdma_qp *qp = to_vqp(ibqp); 681 struct pvrdma_dev *dev = to_vdev(ibqp->device); 682 unsigned long flags; 683 struct pvrdma_sq_wqe_hdr *wqe_hdr; 684 struct pvrdma_sge *sge; 685 int i, ret; 686 687 /* 688 * In states lower than RTS, we can fail immediately. In other states, 689 * just post and let the device figure it out. 690 */ 691 if (qp->state < IB_QPS_RTS) { 692 *bad_wr = wr; 693 return -EINVAL; 694 } 695 696 spin_lock_irqsave(&qp->sq.lock, flags); 697 698 while (wr) { 699 unsigned int tail = 0; 700 701 if (unlikely(!pvrdma_idx_ring_has_space( 702 qp->sq.ring, qp->sq.wqe_cnt, &tail))) { 703 dev_warn_ratelimited(&dev->pdev->dev, 704 "send queue is full\n"); 705 *bad_wr = wr; 706 ret = -ENOMEM; 707 goto out; 708 } 709 710 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) { 711 dev_warn_ratelimited(&dev->pdev->dev, 712 "send SGE overflow\n"); 713 *bad_wr = wr; 714 ret = -EINVAL; 715 goto out; 716 } 717 718 if (unlikely(wr->opcode < 0)) { 719 dev_warn_ratelimited(&dev->pdev->dev, 720 "invalid send opcode\n"); 721 *bad_wr = wr; 722 ret = -EINVAL; 723 goto out; 724 } 725 726 /* 727 * Only support UD, RC. 728 * Need to check opcode table for thorough checking. 729 * opcode _UD _UC _RC 730 * _SEND x x x 731 * _SEND_WITH_IMM x x x 732 * _RDMA_WRITE x x 733 * _RDMA_WRITE_WITH_IMM x x 734 * _LOCAL_INV x x 735 * _SEND_WITH_INV x x 736 * _RDMA_READ x 737 * _ATOMIC_CMP_AND_SWP x 738 * _ATOMIC_FETCH_AND_ADD x 739 * _MASK_ATOMIC_CMP_AND_SWP x 740 * _MASK_ATOMIC_FETCH_AND_ADD x 741 * _REG_MR x 742 * 743 */ 744 if (qp->ibqp.qp_type != IB_QPT_UD && 745 qp->ibqp.qp_type != IB_QPT_RC && 746 wr->opcode != IB_WR_SEND) { 747 dev_warn_ratelimited(&dev->pdev->dev, 748 "unsupported queuepair type\n"); 749 *bad_wr = wr; 750 ret = -EINVAL; 751 goto out; 752 } else if (qp->ibqp.qp_type == IB_QPT_UD || 753 qp->ibqp.qp_type == IB_QPT_GSI) { 754 if (wr->opcode != IB_WR_SEND && 755 wr->opcode != IB_WR_SEND_WITH_IMM) { 756 dev_warn_ratelimited(&dev->pdev->dev, 757 "invalid send opcode\n"); 758 *bad_wr = wr; 759 ret = -EINVAL; 760 goto out; 761 } 762 } 763 764 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail); 765 memset(wqe_hdr, 0, sizeof(*wqe_hdr)); 766 wqe_hdr->wr_id = wr->wr_id; 767 wqe_hdr->num_sge = wr->num_sge; 768 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode); 769 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags); 770 if (wr->opcode == IB_WR_SEND_WITH_IMM || 771 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) 772 wqe_hdr->ex.imm_data = wr->ex.imm_data; 773 774 if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) { 775 *bad_wr = wr; 776 ret = -EINVAL; 777 goto out; 778 } 779 780 switch (qp->ibqp.qp_type) { 781 case IB_QPT_GSI: 782 case IB_QPT_UD: 783 if (unlikely(!ud_wr(wr)->ah)) { 784 dev_warn_ratelimited(&dev->pdev->dev, 785 "invalid address handle\n"); 786 *bad_wr = wr; 787 ret = -EINVAL; 788 goto out; 789 } 790 791 /* 792 * Use qkey from qp context if high order bit set, 793 * otherwise from work request. 794 */ 795 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn; 796 wqe_hdr->wr.ud.remote_qkey = 797 ud_wr(wr)->remote_qkey & 0x80000000 ? 798 qp->qkey : ud_wr(wr)->remote_qkey; 799 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av; 800 801 break; 802 case IB_QPT_RC: 803 switch (wr->opcode) { 804 case IB_WR_RDMA_READ: 805 case IB_WR_RDMA_WRITE: 806 case IB_WR_RDMA_WRITE_WITH_IMM: 807 wqe_hdr->wr.rdma.remote_addr = 808 rdma_wr(wr)->remote_addr; 809 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey; 810 break; 811 case IB_WR_LOCAL_INV: 812 case IB_WR_SEND_WITH_INV: 813 wqe_hdr->ex.invalidate_rkey = 814 wr->ex.invalidate_rkey; 815 break; 816 case IB_WR_ATOMIC_CMP_AND_SWP: 817 case IB_WR_ATOMIC_FETCH_AND_ADD: 818 wqe_hdr->wr.atomic.remote_addr = 819 atomic_wr(wr)->remote_addr; 820 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey; 821 wqe_hdr->wr.atomic.compare_add = 822 atomic_wr(wr)->compare_add; 823 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) 824 wqe_hdr->wr.atomic.swap = 825 atomic_wr(wr)->swap; 826 break; 827 case IB_WR_REG_MR: 828 ret = set_reg_seg(wqe_hdr, reg_wr(wr)); 829 if (ret < 0) { 830 dev_warn_ratelimited(&dev->pdev->dev, 831 "Failed to set fast register work request\n"); 832 *bad_wr = wr; 833 goto out; 834 } 835 break; 836 default: 837 break; 838 } 839 840 break; 841 default: 842 dev_warn_ratelimited(&dev->pdev->dev, 843 "invalid queuepair type\n"); 844 ret = -EINVAL; 845 *bad_wr = wr; 846 goto out; 847 } 848 849 sge = (struct pvrdma_sge *)(wqe_hdr + 1); 850 for (i = 0; i < wr->num_sge; i++) { 851 /* Need to check wqe_size 0 or max size */ 852 sge->addr = wr->sg_list[i].addr; 853 sge->length = wr->sg_list[i].length; 854 sge->lkey = wr->sg_list[i].lkey; 855 sge++; 856 } 857 858 /* Make sure wqe is written before index update */ 859 smp_wmb(); 860 861 /* Update shared sq ring */ 862 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail, 863 qp->sq.wqe_cnt); 864 865 wr = wr->next; 866 } 867 868 ret = 0; 869 870 out: 871 spin_unlock_irqrestore(&qp->sq.lock, flags); 872 873 if (!ret) 874 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle); 875 876 return ret; 877 } 878 879 /** 880 * pvrdma_post_receive - post receive work request entries on a QP 881 * @ibqp: the QP 882 * @wr: the work request list to post 883 * @bad_wr: the first bad WR returned 884 * 885 * @return: 0 on success, otherwise errno returned. 886 */ 887 int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 888 const struct ib_recv_wr **bad_wr) 889 { 890 struct pvrdma_dev *dev = to_vdev(ibqp->device); 891 unsigned long flags; 892 struct pvrdma_qp *qp = to_vqp(ibqp); 893 struct pvrdma_rq_wqe_hdr *wqe_hdr; 894 struct pvrdma_sge *sge; 895 int ret = 0; 896 int i; 897 898 /* 899 * In the RESET state, we can fail immediately. For other states, 900 * just post and let the device figure it out. 901 */ 902 if (qp->state == IB_QPS_RESET) { 903 *bad_wr = wr; 904 return -EINVAL; 905 } 906 907 if (qp->srq) { 908 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n"); 909 *bad_wr = wr; 910 return -EINVAL; 911 } 912 913 spin_lock_irqsave(&qp->rq.lock, flags); 914 915 while (wr) { 916 unsigned int tail = 0; 917 918 if (unlikely(wr->num_sge > qp->rq.max_sg || 919 wr->num_sge < 0)) { 920 ret = -EINVAL; 921 *bad_wr = wr; 922 dev_warn_ratelimited(&dev->pdev->dev, 923 "recv SGE overflow\n"); 924 goto out; 925 } 926 927 if (unlikely(!pvrdma_idx_ring_has_space( 928 qp->rq.ring, qp->rq.wqe_cnt, &tail))) { 929 ret = -ENOMEM; 930 *bad_wr = wr; 931 dev_warn_ratelimited(&dev->pdev->dev, 932 "recv queue full\n"); 933 goto out; 934 } 935 936 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail); 937 wqe_hdr->wr_id = wr->wr_id; 938 wqe_hdr->num_sge = wr->num_sge; 939 wqe_hdr->total_len = 0; 940 941 sge = (struct pvrdma_sge *)(wqe_hdr + 1); 942 for (i = 0; i < wr->num_sge; i++) { 943 sge->addr = wr->sg_list[i].addr; 944 sge->length = wr->sg_list[i].length; 945 sge->lkey = wr->sg_list[i].lkey; 946 sge++; 947 } 948 949 /* Make sure wqe is written before index update */ 950 smp_wmb(); 951 952 /* Update shared rq ring */ 953 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail, 954 qp->rq.wqe_cnt); 955 956 wr = wr->next; 957 } 958 959 spin_unlock_irqrestore(&qp->rq.lock, flags); 960 961 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle); 962 963 return ret; 964 965 out: 966 spin_unlock_irqrestore(&qp->rq.lock, flags); 967 968 return ret; 969 } 970 971 /** 972 * pvrdma_query_qp - query a queue pair's attributes 973 * @ibqp: the queue pair to query 974 * @attr: the queue pair's attributes 975 * @attr_mask: attributes mask 976 * @init_attr: initial queue pair attributes 977 * 978 * @returns 0 on success, otherwise returns an errno. 979 */ 980 int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 981 int attr_mask, struct ib_qp_init_attr *init_attr) 982 { 983 struct pvrdma_dev *dev = to_vdev(ibqp->device); 984 struct pvrdma_qp *qp = to_vqp(ibqp); 985 union pvrdma_cmd_req req; 986 union pvrdma_cmd_resp rsp; 987 struct pvrdma_cmd_query_qp *cmd = &req.query_qp; 988 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp; 989 int ret = 0; 990 991 mutex_lock(&qp->mutex); 992 993 if (qp->state == IB_QPS_RESET) { 994 attr->qp_state = IB_QPS_RESET; 995 goto out; 996 } 997 998 memset(cmd, 0, sizeof(*cmd)); 999 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP; 1000 cmd->qp_handle = qp->qp_handle; 1001 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask); 1002 1003 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP); 1004 if (ret < 0) { 1005 dev_warn(&dev->pdev->dev, 1006 "could not query queuepair, error: %d\n", ret); 1007 goto out; 1008 } 1009 1010 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state); 1011 attr->cur_qp_state = 1012 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state); 1013 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu); 1014 attr->path_mig_state = 1015 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state); 1016 attr->qkey = resp->attrs.qkey; 1017 attr->rq_psn = resp->attrs.rq_psn; 1018 attr->sq_psn = resp->attrs.sq_psn; 1019 attr->dest_qp_num = resp->attrs.dest_qp_num; 1020 attr->qp_access_flags = 1021 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags); 1022 attr->pkey_index = resp->attrs.pkey_index; 1023 attr->alt_pkey_index = resp->attrs.alt_pkey_index; 1024 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify; 1025 attr->sq_draining = resp->attrs.sq_draining; 1026 attr->max_rd_atomic = resp->attrs.max_rd_atomic; 1027 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic; 1028 attr->min_rnr_timer = resp->attrs.min_rnr_timer; 1029 attr->port_num = resp->attrs.port_num; 1030 attr->timeout = resp->attrs.timeout; 1031 attr->retry_cnt = resp->attrs.retry_cnt; 1032 attr->rnr_retry = resp->attrs.rnr_retry; 1033 attr->alt_port_num = resp->attrs.alt_port_num; 1034 attr->alt_timeout = resp->attrs.alt_timeout; 1035 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap); 1036 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr); 1037 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr); 1038 1039 qp->state = attr->qp_state; 1040 1041 ret = 0; 1042 1043 out: 1044 attr->cur_qp_state = attr->qp_state; 1045 1046 init_attr->event_handler = qp->ibqp.event_handler; 1047 init_attr->qp_context = qp->ibqp.qp_context; 1048 init_attr->send_cq = qp->ibqp.send_cq; 1049 init_attr->recv_cq = qp->ibqp.recv_cq; 1050 init_attr->srq = qp->ibqp.srq; 1051 init_attr->xrcd = NULL; 1052 init_attr->cap = attr->cap; 1053 init_attr->sq_sig_type = 0; 1054 init_attr->qp_type = qp->ibqp.qp_type; 1055 init_attr->create_flags = 0; 1056 init_attr->port_num = qp->port; 1057 1058 mutex_unlock(&qp->mutex); 1059 return ret; 1060 } 1061