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