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(-EOPNOTSUPP); 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 fallthrough; 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 = 280 ib_umem_get(pd->device, ucmd.rbuf_addr, 281 ucmd.rbuf_size, 0); 282 if (IS_ERR(qp->rumem)) { 283 ret = PTR_ERR(qp->rumem); 284 goto err_qp; 285 } 286 qp->srq = NULL; 287 } else { 288 qp->rumem = NULL; 289 qp->srq = to_vsrq(init_attr->srq); 290 } 291 292 qp->sumem = ib_umem_get(pd->device, ucmd.sbuf_addr, 293 ucmd.sbuf_size, 0); 294 if (IS_ERR(qp->sumem)) { 295 if (!is_srq) 296 ib_umem_release(qp->rumem); 297 ret = PTR_ERR(qp->sumem); 298 goto err_qp; 299 } 300 301 qp->npages_send = ib_umem_page_count(qp->sumem); 302 if (!is_srq) 303 qp->npages_recv = ib_umem_page_count(qp->rumem); 304 else 305 qp->npages_recv = 0; 306 qp->npages = qp->npages_send + qp->npages_recv; 307 } else { 308 ret = pvrdma_set_sq_size(to_vdev(pd->device), 309 &init_attr->cap, qp); 310 if (ret) 311 goto err_qp; 312 313 ret = pvrdma_set_rq_size(to_vdev(pd->device), 314 &init_attr->cap, qp); 315 if (ret) 316 goto err_qp; 317 318 qp->npages = qp->npages_send + qp->npages_recv; 319 320 /* Skip header page. */ 321 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE; 322 323 /* Recv queue pages are after send pages. */ 324 qp->rq.offset = qp->npages_send * PAGE_SIZE; 325 } 326 327 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) { 328 dev_warn(&dev->pdev->dev, 329 "overflow pages in queuepair\n"); 330 ret = -EINVAL; 331 goto err_umem; 332 } 333 334 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages, 335 qp->is_kernel); 336 if (ret) { 337 dev_warn(&dev->pdev->dev, 338 "could not allocate page directory\n"); 339 goto err_umem; 340 } 341 342 if (!qp->is_kernel) { 343 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0); 344 if (!is_srq) 345 pvrdma_page_dir_insert_umem(&qp->pdir, 346 qp->rumem, 347 qp->npages_send); 348 } else { 349 /* Ring state is always the first page. */ 350 qp->sq.ring = qp->pdir.pages[0]; 351 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1]; 352 } 353 break; 354 default: 355 ret = -EINVAL; 356 goto err_qp; 357 } 358 359 /* Not supported */ 360 init_attr->cap.max_inline_data = 0; 361 362 memset(cmd, 0, sizeof(*cmd)); 363 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP; 364 cmd->pd_handle = to_vpd(pd)->pd_handle; 365 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle; 366 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle; 367 if (is_srq) 368 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle; 369 else 370 cmd->srq_handle = 0; 371 cmd->max_send_wr = init_attr->cap.max_send_wr; 372 cmd->max_recv_wr = init_attr->cap.max_recv_wr; 373 cmd->max_send_sge = init_attr->cap.max_send_sge; 374 cmd->max_recv_sge = init_attr->cap.max_recv_sge; 375 cmd->max_inline_data = init_attr->cap.max_inline_data; 376 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0; 377 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type); 378 cmd->is_srq = is_srq; 379 cmd->lkey = 0; 380 cmd->access_flags = IB_ACCESS_LOCAL_WRITE; 381 cmd->total_chunks = qp->npages; 382 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES; 383 cmd->pdir_dma = qp->pdir.dir_dma; 384 385 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n", 386 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge, 387 cmd->max_recv_sge); 388 389 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP); 390 if (ret < 0) { 391 dev_warn(&dev->pdev->dev, 392 "could not create queuepair, error: %d\n", ret); 393 goto err_pdir; 394 } 395 396 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */ 397 qp->port = init_attr->port_num; 398 399 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION) { 400 qp->ibqp.qp_num = resp_v2->qpn; 401 qp->qp_handle = resp_v2->qp_handle; 402 } else { 403 qp->ibqp.qp_num = resp->qpn; 404 qp->qp_handle = resp->qpn; 405 } 406 407 spin_lock_irqsave(&dev->qp_tbl_lock, flags); 408 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp; 409 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); 410 411 if (udata) { 412 qp_resp.qpn = qp->ibqp.qp_num; 413 qp_resp.qp_handle = qp->qp_handle; 414 415 if (ib_copy_to_udata(udata, &qp_resp, 416 min(udata->outlen, sizeof(qp_resp)))) { 417 dev_warn(&dev->pdev->dev, 418 "failed to copy back udata\n"); 419 __pvrdma_destroy_qp(dev, qp); 420 return ERR_PTR(-EINVAL); 421 } 422 } 423 424 return &qp->ibqp; 425 426 err_pdir: 427 pvrdma_page_dir_cleanup(dev, &qp->pdir); 428 err_umem: 429 ib_umem_release(qp->rumem); 430 ib_umem_release(qp->sumem); 431 err_qp: 432 kfree(qp); 433 atomic_dec(&dev->num_qps); 434 435 return ERR_PTR(ret); 436 } 437 438 static void _pvrdma_free_qp(struct pvrdma_qp *qp) 439 { 440 unsigned long flags; 441 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device); 442 443 spin_lock_irqsave(&dev->qp_tbl_lock, flags); 444 dev->qp_tbl[qp->qp_handle] = NULL; 445 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); 446 447 if (refcount_dec_and_test(&qp->refcnt)) 448 complete(&qp->free); 449 wait_for_completion(&qp->free); 450 451 ib_umem_release(qp->rumem); 452 ib_umem_release(qp->sumem); 453 454 pvrdma_page_dir_cleanup(dev, &qp->pdir); 455 456 kfree(qp); 457 458 atomic_dec(&dev->num_qps); 459 } 460 461 static void pvrdma_free_qp(struct pvrdma_qp *qp) 462 { 463 struct pvrdma_cq *scq; 464 struct pvrdma_cq *rcq; 465 unsigned long scq_flags, rcq_flags; 466 467 /* In case cq is polling */ 468 get_cqs(qp, &scq, &rcq); 469 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags); 470 471 _pvrdma_flush_cqe(qp, scq); 472 if (scq != rcq) 473 _pvrdma_flush_cqe(qp, rcq); 474 475 /* 476 * We're now unlocking the CQs before clearing out the qp handle this 477 * should still be safe. We have destroyed the backend QP and flushed 478 * the CQEs so there should be no other completions for this QP. 479 */ 480 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags); 481 482 _pvrdma_free_qp(qp); 483 } 484 485 static inline void _pvrdma_destroy_qp_work(struct pvrdma_dev *dev, 486 u32 qp_handle) 487 { 488 union pvrdma_cmd_req req; 489 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp; 490 int ret; 491 492 memset(cmd, 0, sizeof(*cmd)); 493 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP; 494 cmd->qp_handle = qp_handle; 495 496 ret = pvrdma_cmd_post(dev, &req, NULL, 0); 497 if (ret < 0) 498 dev_warn(&dev->pdev->dev, 499 "destroy queuepair failed, error: %d\n", ret); 500 } 501 502 /** 503 * pvrdma_destroy_qp - destroy a queue pair 504 * @qp: the queue pair to destroy 505 * @udata: user data or null for kernel object 506 * 507 * @return: always 0. 508 */ 509 int pvrdma_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 510 { 511 struct pvrdma_qp *vqp = to_vqp(qp); 512 513 _pvrdma_destroy_qp_work(to_vdev(qp->device), vqp->qp_handle); 514 pvrdma_free_qp(vqp); 515 516 return 0; 517 } 518 519 static void __pvrdma_destroy_qp(struct pvrdma_dev *dev, 520 struct pvrdma_qp *qp) 521 { 522 _pvrdma_destroy_qp_work(dev, qp->qp_handle); 523 _pvrdma_free_qp(qp); 524 } 525 526 /** 527 * pvrdma_modify_qp - modify queue pair attributes 528 * @ibqp: the queue pair 529 * @attr: the new queue pair's attributes 530 * @attr_mask: attributes mask 531 * @udata: user data 532 * 533 * @returns 0 on success, otherwise returns an errno. 534 */ 535 int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 536 int attr_mask, struct ib_udata *udata) 537 { 538 struct pvrdma_dev *dev = to_vdev(ibqp->device); 539 struct pvrdma_qp *qp = to_vqp(ibqp); 540 union pvrdma_cmd_req req; 541 union pvrdma_cmd_resp rsp; 542 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp; 543 enum ib_qp_state cur_state, next_state; 544 int ret; 545 546 /* Sanity checking. Should need lock here */ 547 mutex_lock(&qp->mutex); 548 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state : 549 qp->state; 550 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state; 551 552 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type, 553 attr_mask)) { 554 ret = -EINVAL; 555 goto out; 556 } 557 558 if (attr_mask & IB_QP_PORT) { 559 if (attr->port_num == 0 || 560 attr->port_num > ibqp->device->phys_port_cnt) { 561 ret = -EINVAL; 562 goto out; 563 } 564 } 565 566 if (attr_mask & IB_QP_MIN_RNR_TIMER) { 567 if (attr->min_rnr_timer > 31) { 568 ret = -EINVAL; 569 goto out; 570 } 571 } 572 573 if (attr_mask & IB_QP_PKEY_INDEX) { 574 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) { 575 ret = -EINVAL; 576 goto out; 577 } 578 } 579 580 if (attr_mask & IB_QP_QKEY) 581 qp->qkey = attr->qkey; 582 583 if (cur_state == next_state && cur_state == IB_QPS_RESET) { 584 ret = 0; 585 goto out; 586 } 587 588 qp->state = next_state; 589 memset(cmd, 0, sizeof(*cmd)); 590 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP; 591 cmd->qp_handle = qp->qp_handle; 592 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask); 593 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state); 594 cmd->attrs.cur_qp_state = 595 ib_qp_state_to_pvrdma(attr->cur_qp_state); 596 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu); 597 cmd->attrs.path_mig_state = 598 ib_mig_state_to_pvrdma(attr->path_mig_state); 599 cmd->attrs.qkey = attr->qkey; 600 cmd->attrs.rq_psn = attr->rq_psn; 601 cmd->attrs.sq_psn = attr->sq_psn; 602 cmd->attrs.dest_qp_num = attr->dest_qp_num; 603 cmd->attrs.qp_access_flags = 604 ib_access_flags_to_pvrdma(attr->qp_access_flags); 605 cmd->attrs.pkey_index = attr->pkey_index; 606 cmd->attrs.alt_pkey_index = attr->alt_pkey_index; 607 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify; 608 cmd->attrs.sq_draining = attr->sq_draining; 609 cmd->attrs.max_rd_atomic = attr->max_rd_atomic; 610 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic; 611 cmd->attrs.min_rnr_timer = attr->min_rnr_timer; 612 cmd->attrs.port_num = attr->port_num; 613 cmd->attrs.timeout = attr->timeout; 614 cmd->attrs.retry_cnt = attr->retry_cnt; 615 cmd->attrs.rnr_retry = attr->rnr_retry; 616 cmd->attrs.alt_port_num = attr->alt_port_num; 617 cmd->attrs.alt_timeout = attr->alt_timeout; 618 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap); 619 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr); 620 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr); 621 622 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP); 623 if (ret < 0) { 624 dev_warn(&dev->pdev->dev, 625 "could not modify queuepair, error: %d\n", ret); 626 } else if (rsp.hdr.err > 0) { 627 dev_warn(&dev->pdev->dev, 628 "cannot modify queuepair, error: %d\n", rsp.hdr.err); 629 ret = -EINVAL; 630 } 631 632 if (ret == 0 && next_state == IB_QPS_RESET) 633 pvrdma_reset_qp(qp); 634 635 out: 636 mutex_unlock(&qp->mutex); 637 638 return ret; 639 } 640 641 static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n) 642 { 643 return pvrdma_page_dir_get_ptr(&qp->pdir, 644 qp->sq.offset + n * qp->sq.wqe_size); 645 } 646 647 static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n) 648 { 649 return pvrdma_page_dir_get_ptr(&qp->pdir, 650 qp->rq.offset + n * qp->rq.wqe_size); 651 } 652 653 static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr, 654 const struct ib_reg_wr *wr) 655 { 656 struct pvrdma_user_mr *mr = to_vmr(wr->mr); 657 658 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova; 659 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma; 660 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift; 661 wqe_hdr->wr.fast_reg.page_list_len = mr->npages; 662 wqe_hdr->wr.fast_reg.length = mr->ibmr.length; 663 wqe_hdr->wr.fast_reg.access_flags = wr->access; 664 wqe_hdr->wr.fast_reg.rkey = wr->key; 665 666 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages, 667 mr->npages); 668 } 669 670 /** 671 * pvrdma_post_send - post send work request entries on a QP 672 * @ibqp: the QP 673 * @wr: work request list to post 674 * @bad_wr: the first bad WR returned 675 * 676 * @return: 0 on success, otherwise errno returned. 677 */ 678 int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 679 const struct ib_send_wr **bad_wr) 680 { 681 struct pvrdma_qp *qp = to_vqp(ibqp); 682 struct pvrdma_dev *dev = to_vdev(ibqp->device); 683 unsigned long flags; 684 struct pvrdma_sq_wqe_hdr *wqe_hdr; 685 struct pvrdma_sge *sge; 686 int i, ret; 687 688 /* 689 * In states lower than RTS, we can fail immediately. In other states, 690 * just post and let the device figure it out. 691 */ 692 if (qp->state < IB_QPS_RTS) { 693 *bad_wr = wr; 694 return -EINVAL; 695 } 696 697 spin_lock_irqsave(&qp->sq.lock, flags); 698 699 while (wr) { 700 unsigned int tail = 0; 701 702 if (unlikely(!pvrdma_idx_ring_has_space( 703 qp->sq.ring, qp->sq.wqe_cnt, &tail))) { 704 dev_warn_ratelimited(&dev->pdev->dev, 705 "send queue is full\n"); 706 *bad_wr = wr; 707 ret = -ENOMEM; 708 goto out; 709 } 710 711 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) { 712 dev_warn_ratelimited(&dev->pdev->dev, 713 "send SGE overflow\n"); 714 *bad_wr = wr; 715 ret = -EINVAL; 716 goto out; 717 } 718 719 if (unlikely(wr->opcode < 0)) { 720 dev_warn_ratelimited(&dev->pdev->dev, 721 "invalid send opcode\n"); 722 *bad_wr = wr; 723 ret = -EINVAL; 724 goto out; 725 } 726 727 /* 728 * Only support UD, RC. 729 * Need to check opcode table for thorough checking. 730 * opcode _UD _UC _RC 731 * _SEND x x x 732 * _SEND_WITH_IMM x x x 733 * _RDMA_WRITE x x 734 * _RDMA_WRITE_WITH_IMM x x 735 * _LOCAL_INV x x 736 * _SEND_WITH_INV x x 737 * _RDMA_READ x 738 * _ATOMIC_CMP_AND_SWP x 739 * _ATOMIC_FETCH_AND_ADD x 740 * _MASK_ATOMIC_CMP_AND_SWP x 741 * _MASK_ATOMIC_FETCH_AND_ADD x 742 * _REG_MR x 743 * 744 */ 745 if (qp->ibqp.qp_type != IB_QPT_UD && 746 qp->ibqp.qp_type != IB_QPT_RC && 747 wr->opcode != IB_WR_SEND) { 748 dev_warn_ratelimited(&dev->pdev->dev, 749 "unsupported queuepair type\n"); 750 *bad_wr = wr; 751 ret = -EINVAL; 752 goto out; 753 } else if (qp->ibqp.qp_type == IB_QPT_UD || 754 qp->ibqp.qp_type == IB_QPT_GSI) { 755 if (wr->opcode != IB_WR_SEND && 756 wr->opcode != IB_WR_SEND_WITH_IMM) { 757 dev_warn_ratelimited(&dev->pdev->dev, 758 "invalid send opcode\n"); 759 *bad_wr = wr; 760 ret = -EINVAL; 761 goto out; 762 } 763 } 764 765 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail); 766 memset(wqe_hdr, 0, sizeof(*wqe_hdr)); 767 wqe_hdr->wr_id = wr->wr_id; 768 wqe_hdr->num_sge = wr->num_sge; 769 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode); 770 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags); 771 if (wr->opcode == IB_WR_SEND_WITH_IMM || 772 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) 773 wqe_hdr->ex.imm_data = wr->ex.imm_data; 774 775 if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) { 776 *bad_wr = wr; 777 ret = -EINVAL; 778 goto out; 779 } 780 781 switch (qp->ibqp.qp_type) { 782 case IB_QPT_GSI: 783 case IB_QPT_UD: 784 if (unlikely(!ud_wr(wr)->ah)) { 785 dev_warn_ratelimited(&dev->pdev->dev, 786 "invalid address handle\n"); 787 *bad_wr = wr; 788 ret = -EINVAL; 789 goto out; 790 } 791 792 /* 793 * Use qkey from qp context if high order bit set, 794 * otherwise from work request. 795 */ 796 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn; 797 wqe_hdr->wr.ud.remote_qkey = 798 ud_wr(wr)->remote_qkey & 0x80000000 ? 799 qp->qkey : ud_wr(wr)->remote_qkey; 800 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av; 801 802 break; 803 case IB_QPT_RC: 804 switch (wr->opcode) { 805 case IB_WR_RDMA_READ: 806 case IB_WR_RDMA_WRITE: 807 case IB_WR_RDMA_WRITE_WITH_IMM: 808 wqe_hdr->wr.rdma.remote_addr = 809 rdma_wr(wr)->remote_addr; 810 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey; 811 break; 812 case IB_WR_LOCAL_INV: 813 case IB_WR_SEND_WITH_INV: 814 wqe_hdr->ex.invalidate_rkey = 815 wr->ex.invalidate_rkey; 816 break; 817 case IB_WR_ATOMIC_CMP_AND_SWP: 818 case IB_WR_ATOMIC_FETCH_AND_ADD: 819 wqe_hdr->wr.atomic.remote_addr = 820 atomic_wr(wr)->remote_addr; 821 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey; 822 wqe_hdr->wr.atomic.compare_add = 823 atomic_wr(wr)->compare_add; 824 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) 825 wqe_hdr->wr.atomic.swap = 826 atomic_wr(wr)->swap; 827 break; 828 case IB_WR_REG_MR: 829 ret = set_reg_seg(wqe_hdr, reg_wr(wr)); 830 if (ret < 0) { 831 dev_warn_ratelimited(&dev->pdev->dev, 832 "Failed to set fast register work request\n"); 833 *bad_wr = wr; 834 goto out; 835 } 836 break; 837 default: 838 break; 839 } 840 841 break; 842 default: 843 dev_warn_ratelimited(&dev->pdev->dev, 844 "invalid queuepair type\n"); 845 ret = -EINVAL; 846 *bad_wr = wr; 847 goto out; 848 } 849 850 sge = (struct pvrdma_sge *)(wqe_hdr + 1); 851 for (i = 0; i < wr->num_sge; i++) { 852 /* Need to check wqe_size 0 or max size */ 853 sge->addr = wr->sg_list[i].addr; 854 sge->length = wr->sg_list[i].length; 855 sge->lkey = wr->sg_list[i].lkey; 856 sge++; 857 } 858 859 /* Make sure wqe is written before index update */ 860 smp_wmb(); 861 862 /* Update shared sq ring */ 863 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail, 864 qp->sq.wqe_cnt); 865 866 wr = wr->next; 867 } 868 869 ret = 0; 870 871 out: 872 spin_unlock_irqrestore(&qp->sq.lock, flags); 873 874 if (!ret) 875 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle); 876 877 return ret; 878 } 879 880 /** 881 * pvrdma_post_receive - post receive work request entries on a QP 882 * @ibqp: the QP 883 * @wr: the work request list to post 884 * @bad_wr: the first bad WR returned 885 * 886 * @return: 0 on success, otherwise errno returned. 887 */ 888 int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 889 const struct ib_recv_wr **bad_wr) 890 { 891 struct pvrdma_dev *dev = to_vdev(ibqp->device); 892 unsigned long flags; 893 struct pvrdma_qp *qp = to_vqp(ibqp); 894 struct pvrdma_rq_wqe_hdr *wqe_hdr; 895 struct pvrdma_sge *sge; 896 int ret = 0; 897 int i; 898 899 /* 900 * In the RESET state, we can fail immediately. For other states, 901 * just post and let the device figure it out. 902 */ 903 if (qp->state == IB_QPS_RESET) { 904 *bad_wr = wr; 905 return -EINVAL; 906 } 907 908 if (qp->srq) { 909 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n"); 910 *bad_wr = wr; 911 return -EINVAL; 912 } 913 914 spin_lock_irqsave(&qp->rq.lock, flags); 915 916 while (wr) { 917 unsigned int tail = 0; 918 919 if (unlikely(wr->num_sge > qp->rq.max_sg || 920 wr->num_sge < 0)) { 921 ret = -EINVAL; 922 *bad_wr = wr; 923 dev_warn_ratelimited(&dev->pdev->dev, 924 "recv SGE overflow\n"); 925 goto out; 926 } 927 928 if (unlikely(!pvrdma_idx_ring_has_space( 929 qp->rq.ring, qp->rq.wqe_cnt, &tail))) { 930 ret = -ENOMEM; 931 *bad_wr = wr; 932 dev_warn_ratelimited(&dev->pdev->dev, 933 "recv queue full\n"); 934 goto out; 935 } 936 937 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail); 938 wqe_hdr->wr_id = wr->wr_id; 939 wqe_hdr->num_sge = wr->num_sge; 940 wqe_hdr->total_len = 0; 941 942 sge = (struct pvrdma_sge *)(wqe_hdr + 1); 943 for (i = 0; i < wr->num_sge; i++) { 944 sge->addr = wr->sg_list[i].addr; 945 sge->length = wr->sg_list[i].length; 946 sge->lkey = wr->sg_list[i].lkey; 947 sge++; 948 } 949 950 /* Make sure wqe is written before index update */ 951 smp_wmb(); 952 953 /* Update shared rq ring */ 954 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail, 955 qp->rq.wqe_cnt); 956 957 wr = wr->next; 958 } 959 960 spin_unlock_irqrestore(&qp->rq.lock, flags); 961 962 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle); 963 964 return ret; 965 966 out: 967 spin_unlock_irqrestore(&qp->rq.lock, flags); 968 969 return ret; 970 } 971 972 /** 973 * pvrdma_query_qp - query a queue pair's attributes 974 * @ibqp: the queue pair to query 975 * @attr: the queue pair's attributes 976 * @attr_mask: attributes mask 977 * @init_attr: initial queue pair attributes 978 * 979 * @returns 0 on success, otherwise returns an errno. 980 */ 981 int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 982 int attr_mask, struct ib_qp_init_attr *init_attr) 983 { 984 struct pvrdma_dev *dev = to_vdev(ibqp->device); 985 struct pvrdma_qp *qp = to_vqp(ibqp); 986 union pvrdma_cmd_req req; 987 union pvrdma_cmd_resp rsp; 988 struct pvrdma_cmd_query_qp *cmd = &req.query_qp; 989 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp; 990 int ret = 0; 991 992 mutex_lock(&qp->mutex); 993 994 if (qp->state == IB_QPS_RESET) { 995 attr->qp_state = IB_QPS_RESET; 996 goto out; 997 } 998 999 memset(cmd, 0, sizeof(*cmd)); 1000 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP; 1001 cmd->qp_handle = qp->qp_handle; 1002 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask); 1003 1004 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP); 1005 if (ret < 0) { 1006 dev_warn(&dev->pdev->dev, 1007 "could not query queuepair, error: %d\n", ret); 1008 goto out; 1009 } 1010 1011 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state); 1012 attr->cur_qp_state = 1013 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state); 1014 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu); 1015 attr->path_mig_state = 1016 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state); 1017 attr->qkey = resp->attrs.qkey; 1018 attr->rq_psn = resp->attrs.rq_psn; 1019 attr->sq_psn = resp->attrs.sq_psn; 1020 attr->dest_qp_num = resp->attrs.dest_qp_num; 1021 attr->qp_access_flags = 1022 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags); 1023 attr->pkey_index = resp->attrs.pkey_index; 1024 attr->alt_pkey_index = resp->attrs.alt_pkey_index; 1025 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify; 1026 attr->sq_draining = resp->attrs.sq_draining; 1027 attr->max_rd_atomic = resp->attrs.max_rd_atomic; 1028 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic; 1029 attr->min_rnr_timer = resp->attrs.min_rnr_timer; 1030 attr->port_num = resp->attrs.port_num; 1031 attr->timeout = resp->attrs.timeout; 1032 attr->retry_cnt = resp->attrs.retry_cnt; 1033 attr->rnr_retry = resp->attrs.rnr_retry; 1034 attr->alt_port_num = resp->attrs.alt_port_num; 1035 attr->alt_timeout = resp->attrs.alt_timeout; 1036 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap); 1037 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr); 1038 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr); 1039 1040 qp->state = attr->qp_state; 1041 1042 ret = 0; 1043 1044 out: 1045 attr->cur_qp_state = attr->qp_state; 1046 1047 init_attr->event_handler = qp->ibqp.event_handler; 1048 init_attr->qp_context = qp->ibqp.qp_context; 1049 init_attr->send_cq = qp->ibqp.send_cq; 1050 init_attr->recv_cq = qp->ibqp.recv_cq; 1051 init_attr->srq = qp->ibqp.srq; 1052 init_attr->xrcd = NULL; 1053 init_attr->cap = attr->cap; 1054 init_attr->sq_sig_type = 0; 1055 init_attr->qp_type = qp->ibqp.qp_type; 1056 init_attr->create_flags = 0; 1057 init_attr->port_num = qp->port; 1058 1059 mutex_unlock(&qp->mutex); 1060 return ret; 1061 } 1062