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