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