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