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(-EOPNOTSUPP); 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 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n"); 237 ret = -EINVAL; 238 goto err_qp; 239 } 240 fallthrough; 241 case IB_QPT_RC: 242 case IB_QPT_UD: 243 qp = kzalloc(sizeof(*qp), GFP_KERNEL); 244 if (!qp) { 245 ret = -ENOMEM; 246 goto err_qp; 247 } 248 249 spin_lock_init(&qp->sq.lock); 250 spin_lock_init(&qp->rq.lock); 251 mutex_init(&qp->mutex); 252 refcount_set(&qp->refcnt, 1); 253 init_completion(&qp->free); 254 255 qp->state = IB_QPS_RESET; 256 qp->is_kernel = !udata; 257 258 if (!qp->is_kernel) { 259 dev_dbg(&dev->pdev->dev, 260 "create queuepair from user space\n"); 261 262 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) { 263 ret = -EFAULT; 264 goto err_qp; 265 } 266 267 /* Userspace supports qpn and qp handles? */ 268 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION && 269 udata->outlen < sizeof(qp_resp)) { 270 dev_warn(&dev->pdev->dev, 271 "create queuepair not supported\n"); 272 ret = -EOPNOTSUPP; 273 goto err_qp; 274 } 275 276 if (!is_srq) { 277 /* set qp->sq.wqe_cnt, shift, buf_size.. */ 278 qp->rumem = 279 ib_umem_get(pd->device, 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(pd->device, 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 = 301 ib_umem_num_dma_blocks(qp->sumem, PAGE_SIZE); 302 if (!is_srq) 303 qp->npages_recv = ib_umem_num_dma_blocks( 304 qp->rumem, PAGE_SIZE); 305 else 306 qp->npages_recv = 0; 307 qp->npages = qp->npages_send + qp->npages_recv; 308 } else { 309 ret = pvrdma_set_sq_size(to_vdev(pd->device), 310 &init_attr->cap, qp); 311 if (ret) 312 goto err_qp; 313 314 ret = pvrdma_set_rq_size(to_vdev(pd->device), 315 &init_attr->cap, qp); 316 if (ret) 317 goto err_qp; 318 319 qp->npages = qp->npages_send + qp->npages_recv; 320 321 /* Skip header page. */ 322 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE; 323 324 /* Recv queue pages are after send pages. */ 325 qp->rq.offset = qp->npages_send * PAGE_SIZE; 326 } 327 328 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) { 329 dev_warn(&dev->pdev->dev, 330 "overflow pages in queuepair\n"); 331 ret = -EINVAL; 332 goto err_umem; 333 } 334 335 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages, 336 qp->is_kernel); 337 if (ret) { 338 dev_warn(&dev->pdev->dev, 339 "could not allocate page directory\n"); 340 goto err_umem; 341 } 342 343 if (!qp->is_kernel) { 344 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0); 345 if (!is_srq) 346 pvrdma_page_dir_insert_umem(&qp->pdir, 347 qp->rumem, 348 qp->npages_send); 349 } else { 350 /* Ring state is always the first page. */ 351 qp->sq.ring = qp->pdir.pages[0]; 352 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1]; 353 } 354 break; 355 default: 356 ret = -EINVAL; 357 goto err_qp; 358 } 359 360 /* Not supported */ 361 init_attr->cap.max_inline_data = 0; 362 363 memset(cmd, 0, sizeof(*cmd)); 364 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP; 365 cmd->pd_handle = to_vpd(pd)->pd_handle; 366 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle; 367 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle; 368 if (is_srq) 369 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle; 370 else 371 cmd->srq_handle = 0; 372 cmd->max_send_wr = init_attr->cap.max_send_wr; 373 cmd->max_recv_wr = init_attr->cap.max_recv_wr; 374 cmd->max_send_sge = init_attr->cap.max_send_sge; 375 cmd->max_recv_sge = init_attr->cap.max_recv_sge; 376 cmd->max_inline_data = init_attr->cap.max_inline_data; 377 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0; 378 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type); 379 cmd->is_srq = is_srq; 380 cmd->lkey = 0; 381 cmd->access_flags = IB_ACCESS_LOCAL_WRITE; 382 cmd->total_chunks = qp->npages; 383 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES; 384 cmd->pdir_dma = qp->pdir.dir_dma; 385 386 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n", 387 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge, 388 cmd->max_recv_sge); 389 390 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP); 391 if (ret < 0) { 392 dev_warn(&dev->pdev->dev, 393 "could not create queuepair, error: %d\n", ret); 394 goto err_pdir; 395 } 396 397 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */ 398 qp->port = init_attr->port_num; 399 400 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION) { 401 qp->ibqp.qp_num = resp_v2->qpn; 402 qp->qp_handle = resp_v2->qp_handle; 403 } else { 404 qp->ibqp.qp_num = resp->qpn; 405 qp->qp_handle = resp->qpn; 406 } 407 408 spin_lock_irqsave(&dev->qp_tbl_lock, flags); 409 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp; 410 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); 411 412 if (udata) { 413 qp_resp.qpn = qp->ibqp.qp_num; 414 qp_resp.qp_handle = qp->qp_handle; 415 416 if (ib_copy_to_udata(udata, &qp_resp, 417 min(udata->outlen, sizeof(qp_resp)))) { 418 dev_warn(&dev->pdev->dev, 419 "failed to copy back udata\n"); 420 __pvrdma_destroy_qp(dev, qp); 421 return ERR_PTR(-EINVAL); 422 } 423 } 424 425 return &qp->ibqp; 426 427 err_pdir: 428 pvrdma_page_dir_cleanup(dev, &qp->pdir); 429 err_umem: 430 ib_umem_release(qp->rumem); 431 ib_umem_release(qp->sumem); 432 err_qp: 433 kfree(qp); 434 atomic_dec(&dev->num_qps); 435 436 return ERR_PTR(ret); 437 } 438 439 static void _pvrdma_free_qp(struct pvrdma_qp *qp) 440 { 441 unsigned long flags; 442 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device); 443 444 spin_lock_irqsave(&dev->qp_tbl_lock, flags); 445 dev->qp_tbl[qp->qp_handle] = NULL; 446 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); 447 448 if (refcount_dec_and_test(&qp->refcnt)) 449 complete(&qp->free); 450 wait_for_completion(&qp->free); 451 452 ib_umem_release(qp->rumem); 453 ib_umem_release(qp->sumem); 454 455 pvrdma_page_dir_cleanup(dev, &qp->pdir); 456 457 kfree(qp); 458 459 atomic_dec(&dev->num_qps); 460 } 461 462 static void pvrdma_free_qp(struct pvrdma_qp *qp) 463 { 464 struct pvrdma_cq *scq; 465 struct pvrdma_cq *rcq; 466 unsigned long scq_flags, rcq_flags; 467 468 /* In case cq is polling */ 469 get_cqs(qp, &scq, &rcq); 470 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags); 471 472 _pvrdma_flush_cqe(qp, scq); 473 if (scq != rcq) 474 _pvrdma_flush_cqe(qp, rcq); 475 476 /* 477 * We're now unlocking the CQs before clearing out the qp handle this 478 * should still be safe. We have destroyed the backend QP and flushed 479 * the CQEs so there should be no other completions for this QP. 480 */ 481 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags); 482 483 _pvrdma_free_qp(qp); 484 } 485 486 static inline void _pvrdma_destroy_qp_work(struct pvrdma_dev *dev, 487 u32 qp_handle) 488 { 489 union pvrdma_cmd_req req; 490 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp; 491 int ret; 492 493 memset(cmd, 0, sizeof(*cmd)); 494 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP; 495 cmd->qp_handle = qp_handle; 496 497 ret = pvrdma_cmd_post(dev, &req, NULL, 0); 498 if (ret < 0) 499 dev_warn(&dev->pdev->dev, 500 "destroy queuepair failed, error: %d\n", ret); 501 } 502 503 /** 504 * pvrdma_destroy_qp - destroy a queue pair 505 * @qp: the queue pair to destroy 506 * @udata: user data or null for kernel object 507 * 508 * @return: always 0. 509 */ 510 int pvrdma_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 511 { 512 struct pvrdma_qp *vqp = to_vqp(qp); 513 514 _pvrdma_destroy_qp_work(to_vdev(qp->device), vqp->qp_handle); 515 pvrdma_free_qp(vqp); 516 517 return 0; 518 } 519 520 static void __pvrdma_destroy_qp(struct pvrdma_dev *dev, 521 struct pvrdma_qp *qp) 522 { 523 _pvrdma_destroy_qp_work(dev, qp->qp_handle); 524 _pvrdma_free_qp(qp); 525 } 526 527 /** 528 * pvrdma_modify_qp - modify queue pair attributes 529 * @ibqp: the queue pair 530 * @attr: the new queue pair's attributes 531 * @attr_mask: attributes mask 532 * @udata: user data 533 * 534 * @returns 0 on success, otherwise returns an errno. 535 */ 536 int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 537 int attr_mask, struct ib_udata *udata) 538 { 539 struct pvrdma_dev *dev = to_vdev(ibqp->device); 540 struct pvrdma_qp *qp = to_vqp(ibqp); 541 union pvrdma_cmd_req req; 542 union pvrdma_cmd_resp rsp; 543 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp; 544 enum ib_qp_state cur_state, next_state; 545 int ret; 546 547 if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 548 return -EOPNOTSUPP; 549 550 /* Sanity checking. Should need lock here */ 551 mutex_lock(&qp->mutex); 552 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state : 553 qp->state; 554 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state; 555 556 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type, 557 attr_mask)) { 558 ret = -EINVAL; 559 goto out; 560 } 561 562 if (attr_mask & IB_QP_PORT) { 563 if (attr->port_num == 0 || 564 attr->port_num > ibqp->device->phys_port_cnt) { 565 ret = -EINVAL; 566 goto out; 567 } 568 } 569 570 if (attr_mask & IB_QP_MIN_RNR_TIMER) { 571 if (attr->min_rnr_timer > 31) { 572 ret = -EINVAL; 573 goto out; 574 } 575 } 576 577 if (attr_mask & IB_QP_PKEY_INDEX) { 578 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) { 579 ret = -EINVAL; 580 goto out; 581 } 582 } 583 584 if (attr_mask & IB_QP_QKEY) 585 qp->qkey = attr->qkey; 586 587 if (cur_state == next_state && cur_state == IB_QPS_RESET) { 588 ret = 0; 589 goto out; 590 } 591 592 qp->state = next_state; 593 memset(cmd, 0, sizeof(*cmd)); 594 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP; 595 cmd->qp_handle = qp->qp_handle; 596 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask); 597 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state); 598 cmd->attrs.cur_qp_state = 599 ib_qp_state_to_pvrdma(attr->cur_qp_state); 600 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu); 601 cmd->attrs.path_mig_state = 602 ib_mig_state_to_pvrdma(attr->path_mig_state); 603 cmd->attrs.qkey = attr->qkey; 604 cmd->attrs.rq_psn = attr->rq_psn; 605 cmd->attrs.sq_psn = attr->sq_psn; 606 cmd->attrs.dest_qp_num = attr->dest_qp_num; 607 cmd->attrs.qp_access_flags = 608 ib_access_flags_to_pvrdma(attr->qp_access_flags); 609 cmd->attrs.pkey_index = attr->pkey_index; 610 cmd->attrs.alt_pkey_index = attr->alt_pkey_index; 611 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify; 612 cmd->attrs.sq_draining = attr->sq_draining; 613 cmd->attrs.max_rd_atomic = attr->max_rd_atomic; 614 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic; 615 cmd->attrs.min_rnr_timer = attr->min_rnr_timer; 616 cmd->attrs.port_num = attr->port_num; 617 cmd->attrs.timeout = attr->timeout; 618 cmd->attrs.retry_cnt = attr->retry_cnt; 619 cmd->attrs.rnr_retry = attr->rnr_retry; 620 cmd->attrs.alt_port_num = attr->alt_port_num; 621 cmd->attrs.alt_timeout = attr->alt_timeout; 622 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap); 623 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr); 624 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr); 625 626 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP); 627 if (ret < 0) { 628 dev_warn(&dev->pdev->dev, 629 "could not modify queuepair, error: %d\n", ret); 630 } else if (rsp.hdr.err > 0) { 631 dev_warn(&dev->pdev->dev, 632 "cannot modify queuepair, error: %d\n", rsp.hdr.err); 633 ret = -EINVAL; 634 } 635 636 if (ret == 0 && next_state == IB_QPS_RESET) 637 pvrdma_reset_qp(qp); 638 639 out: 640 mutex_unlock(&qp->mutex); 641 642 return ret; 643 } 644 645 static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n) 646 { 647 return pvrdma_page_dir_get_ptr(&qp->pdir, 648 qp->sq.offset + n * qp->sq.wqe_size); 649 } 650 651 static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n) 652 { 653 return pvrdma_page_dir_get_ptr(&qp->pdir, 654 qp->rq.offset + n * qp->rq.wqe_size); 655 } 656 657 static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr, 658 const struct ib_reg_wr *wr) 659 { 660 struct pvrdma_user_mr *mr = to_vmr(wr->mr); 661 662 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova; 663 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma; 664 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift; 665 wqe_hdr->wr.fast_reg.page_list_len = mr->npages; 666 wqe_hdr->wr.fast_reg.length = mr->ibmr.length; 667 wqe_hdr->wr.fast_reg.access_flags = wr->access; 668 wqe_hdr->wr.fast_reg.rkey = wr->key; 669 670 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages, 671 mr->npages); 672 } 673 674 /** 675 * pvrdma_post_send - post send work request entries on a QP 676 * @ibqp: the QP 677 * @wr: work request list to post 678 * @bad_wr: the first bad WR returned 679 * 680 * @return: 0 on success, otherwise errno returned. 681 */ 682 int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 683 const struct ib_send_wr **bad_wr) 684 { 685 struct pvrdma_qp *qp = to_vqp(ibqp); 686 struct pvrdma_dev *dev = to_vdev(ibqp->device); 687 unsigned long flags; 688 struct pvrdma_sq_wqe_hdr *wqe_hdr; 689 struct pvrdma_sge *sge; 690 int i, ret; 691 692 /* 693 * In states lower than RTS, we can fail immediately. In other states, 694 * just post and let the device figure it out. 695 */ 696 if (qp->state < IB_QPS_RTS) { 697 *bad_wr = wr; 698 return -EINVAL; 699 } 700 701 spin_lock_irqsave(&qp->sq.lock, flags); 702 703 while (wr) { 704 unsigned int tail = 0; 705 706 if (unlikely(!pvrdma_idx_ring_has_space( 707 qp->sq.ring, qp->sq.wqe_cnt, &tail))) { 708 dev_warn_ratelimited(&dev->pdev->dev, 709 "send queue is full\n"); 710 *bad_wr = wr; 711 ret = -ENOMEM; 712 goto out; 713 } 714 715 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) { 716 dev_warn_ratelimited(&dev->pdev->dev, 717 "send SGE overflow\n"); 718 *bad_wr = wr; 719 ret = -EINVAL; 720 goto out; 721 } 722 723 if (unlikely(wr->opcode < 0)) { 724 dev_warn_ratelimited(&dev->pdev->dev, 725 "invalid send opcode\n"); 726 *bad_wr = wr; 727 ret = -EINVAL; 728 goto out; 729 } 730 731 /* 732 * Only support UD, RC. 733 * Need to check opcode table for thorough checking. 734 * opcode _UD _UC _RC 735 * _SEND x x x 736 * _SEND_WITH_IMM x x x 737 * _RDMA_WRITE x x 738 * _RDMA_WRITE_WITH_IMM x x 739 * _LOCAL_INV x x 740 * _SEND_WITH_INV x x 741 * _RDMA_READ x 742 * _ATOMIC_CMP_AND_SWP x 743 * _ATOMIC_FETCH_AND_ADD x 744 * _MASK_ATOMIC_CMP_AND_SWP x 745 * _MASK_ATOMIC_FETCH_AND_ADD x 746 * _REG_MR x 747 * 748 */ 749 if (qp->ibqp.qp_type != IB_QPT_UD && 750 qp->ibqp.qp_type != IB_QPT_RC && 751 wr->opcode != IB_WR_SEND) { 752 dev_warn_ratelimited(&dev->pdev->dev, 753 "unsupported queuepair type\n"); 754 *bad_wr = wr; 755 ret = -EINVAL; 756 goto out; 757 } else if (qp->ibqp.qp_type == IB_QPT_UD || 758 qp->ibqp.qp_type == IB_QPT_GSI) { 759 if (wr->opcode != IB_WR_SEND && 760 wr->opcode != IB_WR_SEND_WITH_IMM) { 761 dev_warn_ratelimited(&dev->pdev->dev, 762 "invalid send opcode\n"); 763 *bad_wr = wr; 764 ret = -EINVAL; 765 goto out; 766 } 767 } 768 769 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail); 770 memset(wqe_hdr, 0, sizeof(*wqe_hdr)); 771 wqe_hdr->wr_id = wr->wr_id; 772 wqe_hdr->num_sge = wr->num_sge; 773 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode); 774 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags); 775 if (wr->opcode == IB_WR_SEND_WITH_IMM || 776 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) 777 wqe_hdr->ex.imm_data = wr->ex.imm_data; 778 779 if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) { 780 *bad_wr = wr; 781 ret = -EINVAL; 782 goto out; 783 } 784 785 switch (qp->ibqp.qp_type) { 786 case IB_QPT_GSI: 787 case IB_QPT_UD: 788 if (unlikely(!ud_wr(wr)->ah)) { 789 dev_warn_ratelimited(&dev->pdev->dev, 790 "invalid address handle\n"); 791 *bad_wr = wr; 792 ret = -EINVAL; 793 goto out; 794 } 795 796 /* 797 * Use qkey from qp context if high order bit set, 798 * otherwise from work request. 799 */ 800 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn; 801 wqe_hdr->wr.ud.remote_qkey = 802 ud_wr(wr)->remote_qkey & 0x80000000 ? 803 qp->qkey : ud_wr(wr)->remote_qkey; 804 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av; 805 806 break; 807 case IB_QPT_RC: 808 switch (wr->opcode) { 809 case IB_WR_RDMA_READ: 810 case IB_WR_RDMA_WRITE: 811 case IB_WR_RDMA_WRITE_WITH_IMM: 812 wqe_hdr->wr.rdma.remote_addr = 813 rdma_wr(wr)->remote_addr; 814 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey; 815 break; 816 case IB_WR_LOCAL_INV: 817 case IB_WR_SEND_WITH_INV: 818 wqe_hdr->ex.invalidate_rkey = 819 wr->ex.invalidate_rkey; 820 break; 821 case IB_WR_ATOMIC_CMP_AND_SWP: 822 case IB_WR_ATOMIC_FETCH_AND_ADD: 823 wqe_hdr->wr.atomic.remote_addr = 824 atomic_wr(wr)->remote_addr; 825 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey; 826 wqe_hdr->wr.atomic.compare_add = 827 atomic_wr(wr)->compare_add; 828 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) 829 wqe_hdr->wr.atomic.swap = 830 atomic_wr(wr)->swap; 831 break; 832 case IB_WR_REG_MR: 833 ret = set_reg_seg(wqe_hdr, reg_wr(wr)); 834 if (ret < 0) { 835 dev_warn_ratelimited(&dev->pdev->dev, 836 "Failed to set fast register work request\n"); 837 *bad_wr = wr; 838 goto out; 839 } 840 break; 841 default: 842 break; 843 } 844 845 break; 846 default: 847 dev_warn_ratelimited(&dev->pdev->dev, 848 "invalid queuepair type\n"); 849 ret = -EINVAL; 850 *bad_wr = wr; 851 goto out; 852 } 853 854 sge = (struct pvrdma_sge *)(wqe_hdr + 1); 855 for (i = 0; i < wr->num_sge; i++) { 856 /* Need to check wqe_size 0 or max size */ 857 sge->addr = wr->sg_list[i].addr; 858 sge->length = wr->sg_list[i].length; 859 sge->lkey = wr->sg_list[i].lkey; 860 sge++; 861 } 862 863 /* Make sure wqe is written before index update */ 864 smp_wmb(); 865 866 /* Update shared sq ring */ 867 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail, 868 qp->sq.wqe_cnt); 869 870 wr = wr->next; 871 } 872 873 ret = 0; 874 875 out: 876 spin_unlock_irqrestore(&qp->sq.lock, flags); 877 878 if (!ret) 879 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle); 880 881 return ret; 882 } 883 884 /** 885 * pvrdma_post_recv - post receive work request entries on a QP 886 * @ibqp: the QP 887 * @wr: the work request list to post 888 * @bad_wr: the first bad WR returned 889 * 890 * @return: 0 on success, otherwise errno returned. 891 */ 892 int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 893 const struct ib_recv_wr **bad_wr) 894 { 895 struct pvrdma_dev *dev = to_vdev(ibqp->device); 896 unsigned long flags; 897 struct pvrdma_qp *qp = to_vqp(ibqp); 898 struct pvrdma_rq_wqe_hdr *wqe_hdr; 899 struct pvrdma_sge *sge; 900 int ret = 0; 901 int i; 902 903 /* 904 * In the RESET state, we can fail immediately. For other states, 905 * just post and let the device figure it out. 906 */ 907 if (qp->state == IB_QPS_RESET) { 908 *bad_wr = wr; 909 return -EINVAL; 910 } 911 912 if (qp->srq) { 913 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n"); 914 *bad_wr = wr; 915 return -EINVAL; 916 } 917 918 spin_lock_irqsave(&qp->rq.lock, flags); 919 920 while (wr) { 921 unsigned int tail = 0; 922 923 if (unlikely(wr->num_sge > qp->rq.max_sg || 924 wr->num_sge < 0)) { 925 ret = -EINVAL; 926 *bad_wr = wr; 927 dev_warn_ratelimited(&dev->pdev->dev, 928 "recv SGE overflow\n"); 929 goto out; 930 } 931 932 if (unlikely(!pvrdma_idx_ring_has_space( 933 qp->rq.ring, qp->rq.wqe_cnt, &tail))) { 934 ret = -ENOMEM; 935 *bad_wr = wr; 936 dev_warn_ratelimited(&dev->pdev->dev, 937 "recv queue full\n"); 938 goto out; 939 } 940 941 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail); 942 wqe_hdr->wr_id = wr->wr_id; 943 wqe_hdr->num_sge = wr->num_sge; 944 wqe_hdr->total_len = 0; 945 946 sge = (struct pvrdma_sge *)(wqe_hdr + 1); 947 for (i = 0; i < wr->num_sge; i++) { 948 sge->addr = wr->sg_list[i].addr; 949 sge->length = wr->sg_list[i].length; 950 sge->lkey = wr->sg_list[i].lkey; 951 sge++; 952 } 953 954 /* Make sure wqe is written before index update */ 955 smp_wmb(); 956 957 /* Update shared rq ring */ 958 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail, 959 qp->rq.wqe_cnt); 960 961 wr = wr->next; 962 } 963 964 spin_unlock_irqrestore(&qp->rq.lock, flags); 965 966 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle); 967 968 return ret; 969 970 out: 971 spin_unlock_irqrestore(&qp->rq.lock, flags); 972 973 return ret; 974 } 975 976 /** 977 * pvrdma_query_qp - query a queue pair's attributes 978 * @ibqp: the queue pair to query 979 * @attr: the queue pair's attributes 980 * @attr_mask: attributes mask 981 * @init_attr: initial queue pair attributes 982 * 983 * @returns 0 on success, otherwise returns an errno. 984 */ 985 int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 986 int attr_mask, struct ib_qp_init_attr *init_attr) 987 { 988 struct pvrdma_dev *dev = to_vdev(ibqp->device); 989 struct pvrdma_qp *qp = to_vqp(ibqp); 990 union pvrdma_cmd_req req; 991 union pvrdma_cmd_resp rsp; 992 struct pvrdma_cmd_query_qp *cmd = &req.query_qp; 993 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp; 994 int ret = 0; 995 996 mutex_lock(&qp->mutex); 997 998 if (qp->state == IB_QPS_RESET) { 999 attr->qp_state = IB_QPS_RESET; 1000 goto out; 1001 } 1002 1003 memset(cmd, 0, sizeof(*cmd)); 1004 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP; 1005 cmd->qp_handle = qp->qp_handle; 1006 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask); 1007 1008 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP); 1009 if (ret < 0) { 1010 dev_warn(&dev->pdev->dev, 1011 "could not query queuepair, error: %d\n", ret); 1012 goto out; 1013 } 1014 1015 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state); 1016 attr->cur_qp_state = 1017 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state); 1018 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu); 1019 attr->path_mig_state = 1020 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state); 1021 attr->qkey = resp->attrs.qkey; 1022 attr->rq_psn = resp->attrs.rq_psn; 1023 attr->sq_psn = resp->attrs.sq_psn; 1024 attr->dest_qp_num = resp->attrs.dest_qp_num; 1025 attr->qp_access_flags = 1026 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags); 1027 attr->pkey_index = resp->attrs.pkey_index; 1028 attr->alt_pkey_index = resp->attrs.alt_pkey_index; 1029 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify; 1030 attr->sq_draining = resp->attrs.sq_draining; 1031 attr->max_rd_atomic = resp->attrs.max_rd_atomic; 1032 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic; 1033 attr->min_rnr_timer = resp->attrs.min_rnr_timer; 1034 attr->port_num = resp->attrs.port_num; 1035 attr->timeout = resp->attrs.timeout; 1036 attr->retry_cnt = resp->attrs.retry_cnt; 1037 attr->rnr_retry = resp->attrs.rnr_retry; 1038 attr->alt_port_num = resp->attrs.alt_port_num; 1039 attr->alt_timeout = resp->attrs.alt_timeout; 1040 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap); 1041 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr); 1042 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr); 1043 1044 qp->state = attr->qp_state; 1045 1046 ret = 0; 1047 1048 out: 1049 attr->cur_qp_state = attr->qp_state; 1050 1051 init_attr->event_handler = qp->ibqp.event_handler; 1052 init_attr->qp_context = qp->ibqp.qp_context; 1053 init_attr->send_cq = qp->ibqp.send_cq; 1054 init_attr->recv_cq = qp->ibqp.recv_cq; 1055 init_attr->srq = qp->ibqp.srq; 1056 init_attr->xrcd = NULL; 1057 init_attr->cap = attr->cap; 1058 init_attr->sq_sig_type = 0; 1059 init_attr->qp_type = qp->ibqp.qp_type; 1060 init_attr->create_flags = 0; 1061 init_attr->port_num = qp->port; 1062 1063 mutex_unlock(&qp->mutex); 1064 return ret; 1065 } 1066