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