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