1 /* 2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/mlx4/cq.h> 35 #include <linux/mlx4/qp.h> 36 #include <linux/mlx4/srq.h> 37 #include <linux/slab.h> 38 39 #include "mlx4_ib.h" 40 #include "user.h" 41 42 static void mlx4_ib_cq_comp(struct mlx4_cq *cq) 43 { 44 struct ib_cq *ibcq = &to_mibcq(cq)->ibcq; 45 ibcq->comp_handler(ibcq, ibcq->cq_context); 46 } 47 48 static void mlx4_ib_cq_event(struct mlx4_cq *cq, enum mlx4_event type) 49 { 50 struct ib_event event; 51 struct ib_cq *ibcq; 52 53 if (type != MLX4_EVENT_TYPE_CQ_ERROR) { 54 pr_warn("Unexpected event type %d " 55 "on CQ %06x\n", type, cq->cqn); 56 return; 57 } 58 59 ibcq = &to_mibcq(cq)->ibcq; 60 if (ibcq->event_handler) { 61 event.device = ibcq->device; 62 event.event = IB_EVENT_CQ_ERR; 63 event.element.cq = ibcq; 64 ibcq->event_handler(&event, ibcq->cq_context); 65 } 66 } 67 68 static void *get_cqe_from_buf(struct mlx4_ib_cq_buf *buf, int n) 69 { 70 return mlx4_buf_offset(&buf->buf, n * buf->entry_size); 71 } 72 73 static void *get_cqe(struct mlx4_ib_cq *cq, int n) 74 { 75 return get_cqe_from_buf(&cq->buf, n); 76 } 77 78 static void *get_sw_cqe(struct mlx4_ib_cq *cq, int n) 79 { 80 struct mlx4_cqe *cqe = get_cqe(cq, n & cq->ibcq.cqe); 81 struct mlx4_cqe *tcqe = ((cq->buf.entry_size == 64) ? (cqe + 1) : cqe); 82 83 return (!!(tcqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK) ^ 84 !!(n & (cq->ibcq.cqe + 1))) ? NULL : cqe; 85 } 86 87 static struct mlx4_cqe *next_cqe_sw(struct mlx4_ib_cq *cq) 88 { 89 return get_sw_cqe(cq, cq->mcq.cons_index); 90 } 91 92 int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) 93 { 94 struct mlx4_ib_cq *mcq = to_mcq(cq); 95 struct mlx4_ib_dev *dev = to_mdev(cq->device); 96 97 return mlx4_cq_modify(dev->dev, &mcq->mcq, cq_count, cq_period); 98 } 99 100 static int mlx4_ib_alloc_cq_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq_buf *buf, int nent) 101 { 102 int err; 103 104 err = mlx4_buf_alloc(dev->dev, nent * dev->dev->caps.cqe_size, 105 PAGE_SIZE * 2, &buf->buf); 106 107 if (err) 108 goto out; 109 110 buf->entry_size = dev->dev->caps.cqe_size; 111 err = mlx4_mtt_init(dev->dev, buf->buf.npages, buf->buf.page_shift, 112 &buf->mtt); 113 if (err) 114 goto err_buf; 115 116 err = mlx4_buf_write_mtt(dev->dev, &buf->mtt, &buf->buf); 117 if (err) 118 goto err_mtt; 119 120 return 0; 121 122 err_mtt: 123 mlx4_mtt_cleanup(dev->dev, &buf->mtt); 124 125 err_buf: 126 mlx4_buf_free(dev->dev, nent * buf->entry_size, &buf->buf); 127 128 out: 129 return err; 130 } 131 132 static void mlx4_ib_free_cq_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq_buf *buf, int cqe) 133 { 134 mlx4_buf_free(dev->dev, (cqe + 1) * buf->entry_size, &buf->buf); 135 } 136 137 static int mlx4_ib_get_cq_umem(struct mlx4_ib_dev *dev, struct ib_ucontext *context, 138 struct mlx4_ib_cq_buf *buf, struct ib_umem **umem, 139 u64 buf_addr, int cqe) 140 { 141 int err; 142 int cqe_size = dev->dev->caps.cqe_size; 143 144 *umem = ib_umem_get(context, buf_addr, cqe * cqe_size, 145 IB_ACCESS_LOCAL_WRITE, 1); 146 if (IS_ERR(*umem)) 147 return PTR_ERR(*umem); 148 149 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(*umem), 150 ilog2((*umem)->page_size), &buf->mtt); 151 if (err) 152 goto err_buf; 153 154 err = mlx4_ib_umem_write_mtt(dev, &buf->mtt, *umem); 155 if (err) 156 goto err_mtt; 157 158 return 0; 159 160 err_mtt: 161 mlx4_mtt_cleanup(dev->dev, &buf->mtt); 162 163 err_buf: 164 ib_umem_release(*umem); 165 166 return err; 167 } 168 169 struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector, 170 struct ib_ucontext *context, 171 struct ib_udata *udata) 172 { 173 struct mlx4_ib_dev *dev = to_mdev(ibdev); 174 struct mlx4_ib_cq *cq; 175 struct mlx4_uar *uar; 176 int err; 177 178 if (entries < 1 || entries > dev->dev->caps.max_cqes) 179 return ERR_PTR(-EINVAL); 180 181 cq = kmalloc(sizeof *cq, GFP_KERNEL); 182 if (!cq) 183 return ERR_PTR(-ENOMEM); 184 185 entries = roundup_pow_of_two(entries + 1); 186 cq->ibcq.cqe = entries - 1; 187 mutex_init(&cq->resize_mutex); 188 spin_lock_init(&cq->lock); 189 cq->resize_buf = NULL; 190 cq->resize_umem = NULL; 191 192 if (context) { 193 struct mlx4_ib_create_cq ucmd; 194 195 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { 196 err = -EFAULT; 197 goto err_cq; 198 } 199 200 err = mlx4_ib_get_cq_umem(dev, context, &cq->buf, &cq->umem, 201 ucmd.buf_addr, entries); 202 if (err) 203 goto err_cq; 204 205 err = mlx4_ib_db_map_user(to_mucontext(context), ucmd.db_addr, 206 &cq->db); 207 if (err) 208 goto err_mtt; 209 210 uar = &to_mucontext(context)->uar; 211 } else { 212 err = mlx4_db_alloc(dev->dev, &cq->db, 1); 213 if (err) 214 goto err_cq; 215 216 cq->mcq.set_ci_db = cq->db.db; 217 cq->mcq.arm_db = cq->db.db + 1; 218 *cq->mcq.set_ci_db = 0; 219 *cq->mcq.arm_db = 0; 220 221 err = mlx4_ib_alloc_cq_buf(dev, &cq->buf, entries); 222 if (err) 223 goto err_db; 224 225 uar = &dev->priv_uar; 226 } 227 228 if (dev->eq_table) 229 vector = dev->eq_table[vector % ibdev->num_comp_vectors]; 230 231 err = mlx4_cq_alloc(dev->dev, entries, &cq->buf.mtt, uar, 232 cq->db.dma, &cq->mcq, vector, 0, 0); 233 if (err) 234 goto err_dbmap; 235 236 cq->mcq.comp = mlx4_ib_cq_comp; 237 cq->mcq.event = mlx4_ib_cq_event; 238 239 if (context) 240 if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof (__u32))) { 241 err = -EFAULT; 242 goto err_dbmap; 243 } 244 245 return &cq->ibcq; 246 247 err_dbmap: 248 if (context) 249 mlx4_ib_db_unmap_user(to_mucontext(context), &cq->db); 250 251 err_mtt: 252 mlx4_mtt_cleanup(dev->dev, &cq->buf.mtt); 253 254 if (context) 255 ib_umem_release(cq->umem); 256 else 257 mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe); 258 259 err_db: 260 if (!context) 261 mlx4_db_free(dev->dev, &cq->db); 262 263 err_cq: 264 kfree(cq); 265 266 return ERR_PTR(err); 267 } 268 269 static int mlx4_alloc_resize_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq, 270 int entries) 271 { 272 int err; 273 274 if (cq->resize_buf) 275 return -EBUSY; 276 277 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC); 278 if (!cq->resize_buf) 279 return -ENOMEM; 280 281 err = mlx4_ib_alloc_cq_buf(dev, &cq->resize_buf->buf, entries); 282 if (err) { 283 kfree(cq->resize_buf); 284 cq->resize_buf = NULL; 285 return err; 286 } 287 288 cq->resize_buf->cqe = entries - 1; 289 290 return 0; 291 } 292 293 static int mlx4_alloc_resize_umem(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq, 294 int entries, struct ib_udata *udata) 295 { 296 struct mlx4_ib_resize_cq ucmd; 297 int err; 298 299 if (cq->resize_umem) 300 return -EBUSY; 301 302 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) 303 return -EFAULT; 304 305 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC); 306 if (!cq->resize_buf) 307 return -ENOMEM; 308 309 err = mlx4_ib_get_cq_umem(dev, cq->umem->context, &cq->resize_buf->buf, 310 &cq->resize_umem, ucmd.buf_addr, entries); 311 if (err) { 312 kfree(cq->resize_buf); 313 cq->resize_buf = NULL; 314 return err; 315 } 316 317 cq->resize_buf->cqe = entries - 1; 318 319 return 0; 320 } 321 322 static int mlx4_ib_get_outstanding_cqes(struct mlx4_ib_cq *cq) 323 { 324 u32 i; 325 326 i = cq->mcq.cons_index; 327 while (get_sw_cqe(cq, i & cq->ibcq.cqe)) 328 ++i; 329 330 return i - cq->mcq.cons_index; 331 } 332 333 static void mlx4_ib_cq_resize_copy_cqes(struct mlx4_ib_cq *cq) 334 { 335 struct mlx4_cqe *cqe, *new_cqe; 336 int i; 337 int cqe_size = cq->buf.entry_size; 338 int cqe_inc = cqe_size == 64 ? 1 : 0; 339 340 i = cq->mcq.cons_index; 341 cqe = get_cqe(cq, i & cq->ibcq.cqe); 342 cqe += cqe_inc; 343 344 while ((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) != MLX4_CQE_OPCODE_RESIZE) { 345 new_cqe = get_cqe_from_buf(&cq->resize_buf->buf, 346 (i + 1) & cq->resize_buf->cqe); 347 memcpy(new_cqe, get_cqe(cq, i & cq->ibcq.cqe), cqe_size); 348 new_cqe += cqe_inc; 349 350 new_cqe->owner_sr_opcode = (cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK) | 351 (((i + 1) & (cq->resize_buf->cqe + 1)) ? MLX4_CQE_OWNER_MASK : 0); 352 cqe = get_cqe(cq, ++i & cq->ibcq.cqe); 353 cqe += cqe_inc; 354 } 355 ++cq->mcq.cons_index; 356 } 357 358 int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) 359 { 360 struct mlx4_ib_dev *dev = to_mdev(ibcq->device); 361 struct mlx4_ib_cq *cq = to_mcq(ibcq); 362 struct mlx4_mtt mtt; 363 int outst_cqe; 364 int err; 365 366 mutex_lock(&cq->resize_mutex); 367 368 if (entries < 1 || entries > dev->dev->caps.max_cqes) { 369 err = -EINVAL; 370 goto out; 371 } 372 373 entries = roundup_pow_of_two(entries + 1); 374 if (entries == ibcq->cqe + 1) { 375 err = 0; 376 goto out; 377 } 378 379 if (ibcq->uobject) { 380 err = mlx4_alloc_resize_umem(dev, cq, entries, udata); 381 if (err) 382 goto out; 383 } else { 384 /* Can't be smaller than the number of outstanding CQEs */ 385 outst_cqe = mlx4_ib_get_outstanding_cqes(cq); 386 if (entries < outst_cqe + 1) { 387 err = 0; 388 goto out; 389 } 390 391 err = mlx4_alloc_resize_buf(dev, cq, entries); 392 if (err) 393 goto out; 394 } 395 396 mtt = cq->buf.mtt; 397 398 err = mlx4_cq_resize(dev->dev, &cq->mcq, entries, &cq->resize_buf->buf.mtt); 399 if (err) 400 goto err_buf; 401 402 mlx4_mtt_cleanup(dev->dev, &mtt); 403 if (ibcq->uobject) { 404 cq->buf = cq->resize_buf->buf; 405 cq->ibcq.cqe = cq->resize_buf->cqe; 406 ib_umem_release(cq->umem); 407 cq->umem = cq->resize_umem; 408 409 kfree(cq->resize_buf); 410 cq->resize_buf = NULL; 411 cq->resize_umem = NULL; 412 } else { 413 struct mlx4_ib_cq_buf tmp_buf; 414 int tmp_cqe = 0; 415 416 spin_lock_irq(&cq->lock); 417 if (cq->resize_buf) { 418 mlx4_ib_cq_resize_copy_cqes(cq); 419 tmp_buf = cq->buf; 420 tmp_cqe = cq->ibcq.cqe; 421 cq->buf = cq->resize_buf->buf; 422 cq->ibcq.cqe = cq->resize_buf->cqe; 423 424 kfree(cq->resize_buf); 425 cq->resize_buf = NULL; 426 } 427 spin_unlock_irq(&cq->lock); 428 429 if (tmp_cqe) 430 mlx4_ib_free_cq_buf(dev, &tmp_buf, tmp_cqe); 431 } 432 433 goto out; 434 435 err_buf: 436 mlx4_mtt_cleanup(dev->dev, &cq->resize_buf->buf.mtt); 437 if (!ibcq->uobject) 438 mlx4_ib_free_cq_buf(dev, &cq->resize_buf->buf, 439 cq->resize_buf->cqe); 440 441 kfree(cq->resize_buf); 442 cq->resize_buf = NULL; 443 444 if (cq->resize_umem) { 445 ib_umem_release(cq->resize_umem); 446 cq->resize_umem = NULL; 447 } 448 449 out: 450 mutex_unlock(&cq->resize_mutex); 451 452 return err; 453 } 454 455 int mlx4_ib_destroy_cq(struct ib_cq *cq) 456 { 457 struct mlx4_ib_dev *dev = to_mdev(cq->device); 458 struct mlx4_ib_cq *mcq = to_mcq(cq); 459 460 mlx4_cq_free(dev->dev, &mcq->mcq); 461 mlx4_mtt_cleanup(dev->dev, &mcq->buf.mtt); 462 463 if (cq->uobject) { 464 mlx4_ib_db_unmap_user(to_mucontext(cq->uobject->context), &mcq->db); 465 ib_umem_release(mcq->umem); 466 } else { 467 mlx4_ib_free_cq_buf(dev, &mcq->buf, cq->cqe); 468 mlx4_db_free(dev->dev, &mcq->db); 469 } 470 471 kfree(mcq); 472 473 return 0; 474 } 475 476 static void dump_cqe(void *cqe) 477 { 478 __be32 *buf = cqe; 479 480 pr_debug("CQE contents %08x %08x %08x %08x %08x %08x %08x %08x\n", 481 be32_to_cpu(buf[0]), be32_to_cpu(buf[1]), be32_to_cpu(buf[2]), 482 be32_to_cpu(buf[3]), be32_to_cpu(buf[4]), be32_to_cpu(buf[5]), 483 be32_to_cpu(buf[6]), be32_to_cpu(buf[7])); 484 } 485 486 static void mlx4_ib_handle_error_cqe(struct mlx4_err_cqe *cqe, 487 struct ib_wc *wc) 488 { 489 if (cqe->syndrome == MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR) { 490 pr_debug("local QP operation err " 491 "(QPN %06x, WQE index %x, vendor syndrome %02x, " 492 "opcode = %02x)\n", 493 be32_to_cpu(cqe->my_qpn), be16_to_cpu(cqe->wqe_index), 494 cqe->vendor_err_syndrome, 495 cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK); 496 dump_cqe(cqe); 497 } 498 499 switch (cqe->syndrome) { 500 case MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR: 501 wc->status = IB_WC_LOC_LEN_ERR; 502 break; 503 case MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR: 504 wc->status = IB_WC_LOC_QP_OP_ERR; 505 break; 506 case MLX4_CQE_SYNDROME_LOCAL_PROT_ERR: 507 wc->status = IB_WC_LOC_PROT_ERR; 508 break; 509 case MLX4_CQE_SYNDROME_WR_FLUSH_ERR: 510 wc->status = IB_WC_WR_FLUSH_ERR; 511 break; 512 case MLX4_CQE_SYNDROME_MW_BIND_ERR: 513 wc->status = IB_WC_MW_BIND_ERR; 514 break; 515 case MLX4_CQE_SYNDROME_BAD_RESP_ERR: 516 wc->status = IB_WC_BAD_RESP_ERR; 517 break; 518 case MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR: 519 wc->status = IB_WC_LOC_ACCESS_ERR; 520 break; 521 case MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR: 522 wc->status = IB_WC_REM_INV_REQ_ERR; 523 break; 524 case MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR: 525 wc->status = IB_WC_REM_ACCESS_ERR; 526 break; 527 case MLX4_CQE_SYNDROME_REMOTE_OP_ERR: 528 wc->status = IB_WC_REM_OP_ERR; 529 break; 530 case MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR: 531 wc->status = IB_WC_RETRY_EXC_ERR; 532 break; 533 case MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR: 534 wc->status = IB_WC_RNR_RETRY_EXC_ERR; 535 break; 536 case MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR: 537 wc->status = IB_WC_REM_ABORT_ERR; 538 break; 539 default: 540 wc->status = IB_WC_GENERAL_ERR; 541 break; 542 } 543 544 wc->vendor_err = cqe->vendor_err_syndrome; 545 } 546 547 static int mlx4_ib_ipoib_csum_ok(__be16 status, __be16 checksum) 548 { 549 return ((status & cpu_to_be16(MLX4_CQE_STATUS_IPV4 | 550 MLX4_CQE_STATUS_IPV4F | 551 MLX4_CQE_STATUS_IPV4OPT | 552 MLX4_CQE_STATUS_IPV6 | 553 MLX4_CQE_STATUS_IPOK)) == 554 cpu_to_be16(MLX4_CQE_STATUS_IPV4 | 555 MLX4_CQE_STATUS_IPOK)) && 556 (status & cpu_to_be16(MLX4_CQE_STATUS_UDP | 557 MLX4_CQE_STATUS_TCP)) && 558 checksum == cpu_to_be16(0xffff); 559 } 560 561 static int use_tunnel_data(struct mlx4_ib_qp *qp, struct mlx4_ib_cq *cq, struct ib_wc *wc, 562 unsigned tail, struct mlx4_cqe *cqe) 563 { 564 struct mlx4_ib_proxy_sqp_hdr *hdr; 565 566 ib_dma_sync_single_for_cpu(qp->ibqp.device, 567 qp->sqp_proxy_rcv[tail].map, 568 sizeof (struct mlx4_ib_proxy_sqp_hdr), 569 DMA_FROM_DEVICE); 570 hdr = (struct mlx4_ib_proxy_sqp_hdr *) (qp->sqp_proxy_rcv[tail].addr); 571 wc->pkey_index = be16_to_cpu(hdr->tun.pkey_index); 572 wc->slid = be16_to_cpu(hdr->tun.slid_mac_47_32); 573 wc->sl = (u8) (be16_to_cpu(hdr->tun.sl_vid) >> 12); 574 wc->src_qp = be32_to_cpu(hdr->tun.flags_src_qp) & 0xFFFFFF; 575 wc->wc_flags |= (hdr->tun.g_ml_path & 0x80) ? (IB_WC_GRH) : 0; 576 wc->dlid_path_bits = 0; 577 578 return 0; 579 } 580 581 static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq, 582 struct mlx4_ib_qp **cur_qp, 583 struct ib_wc *wc) 584 { 585 struct mlx4_cqe *cqe; 586 struct mlx4_qp *mqp; 587 struct mlx4_ib_wq *wq; 588 struct mlx4_ib_srq *srq; 589 struct mlx4_srq *msrq = NULL; 590 int is_send; 591 int is_error; 592 u32 g_mlpath_rqpn; 593 u16 wqe_ctr; 594 unsigned tail = 0; 595 596 repoll: 597 cqe = next_cqe_sw(cq); 598 if (!cqe) 599 return -EAGAIN; 600 601 if (cq->buf.entry_size == 64) 602 cqe++; 603 604 ++cq->mcq.cons_index; 605 606 /* 607 * Make sure we read CQ entry contents after we've checked the 608 * ownership bit. 609 */ 610 rmb(); 611 612 is_send = cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK; 613 is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == 614 MLX4_CQE_OPCODE_ERROR; 615 616 if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_OPCODE_NOP && 617 is_send)) { 618 pr_warn("Completion for NOP opcode detected!\n"); 619 return -EINVAL; 620 } 621 622 /* Resize CQ in progress */ 623 if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_CQE_OPCODE_RESIZE)) { 624 if (cq->resize_buf) { 625 struct mlx4_ib_dev *dev = to_mdev(cq->ibcq.device); 626 627 mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe); 628 cq->buf = cq->resize_buf->buf; 629 cq->ibcq.cqe = cq->resize_buf->cqe; 630 631 kfree(cq->resize_buf); 632 cq->resize_buf = NULL; 633 } 634 635 goto repoll; 636 } 637 638 if (!*cur_qp || 639 (be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK) != (*cur_qp)->mqp.qpn) { 640 /* 641 * We do not have to take the QP table lock here, 642 * because CQs will be locked while QPs are removed 643 * from the table. 644 */ 645 mqp = __mlx4_qp_lookup(to_mdev(cq->ibcq.device)->dev, 646 be32_to_cpu(cqe->vlan_my_qpn)); 647 if (unlikely(!mqp)) { 648 pr_warn("CQ %06x with entry for unknown QPN %06x\n", 649 cq->mcq.cqn, be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK); 650 return -EINVAL; 651 } 652 653 *cur_qp = to_mibqp(mqp); 654 } 655 656 wc->qp = &(*cur_qp)->ibqp; 657 658 if (wc->qp->qp_type == IB_QPT_XRC_TGT) { 659 u32 srq_num; 660 g_mlpath_rqpn = be32_to_cpu(cqe->g_mlpath_rqpn); 661 srq_num = g_mlpath_rqpn & 0xffffff; 662 /* SRQ is also in the radix tree */ 663 msrq = mlx4_srq_lookup(to_mdev(cq->ibcq.device)->dev, 664 srq_num); 665 if (unlikely(!msrq)) { 666 pr_warn("CQ %06x with entry for unknown SRQN %06x\n", 667 cq->mcq.cqn, srq_num); 668 return -EINVAL; 669 } 670 } 671 672 if (is_send) { 673 wq = &(*cur_qp)->sq; 674 if (!(*cur_qp)->sq_signal_bits) { 675 wqe_ctr = be16_to_cpu(cqe->wqe_index); 676 wq->tail += (u16) (wqe_ctr - (u16) wq->tail); 677 } 678 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; 679 ++wq->tail; 680 } else if ((*cur_qp)->ibqp.srq) { 681 srq = to_msrq((*cur_qp)->ibqp.srq); 682 wqe_ctr = be16_to_cpu(cqe->wqe_index); 683 wc->wr_id = srq->wrid[wqe_ctr]; 684 mlx4_ib_free_srq_wqe(srq, wqe_ctr); 685 } else if (msrq) { 686 srq = to_mibsrq(msrq); 687 wqe_ctr = be16_to_cpu(cqe->wqe_index); 688 wc->wr_id = srq->wrid[wqe_ctr]; 689 mlx4_ib_free_srq_wqe(srq, wqe_ctr); 690 } else { 691 wq = &(*cur_qp)->rq; 692 tail = wq->tail & (wq->wqe_cnt - 1); 693 wc->wr_id = wq->wrid[tail]; 694 ++wq->tail; 695 } 696 697 if (unlikely(is_error)) { 698 mlx4_ib_handle_error_cqe((struct mlx4_err_cqe *) cqe, wc); 699 return 0; 700 } 701 702 wc->status = IB_WC_SUCCESS; 703 704 if (is_send) { 705 wc->wc_flags = 0; 706 switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) { 707 case MLX4_OPCODE_RDMA_WRITE_IMM: 708 wc->wc_flags |= IB_WC_WITH_IMM; 709 case MLX4_OPCODE_RDMA_WRITE: 710 wc->opcode = IB_WC_RDMA_WRITE; 711 break; 712 case MLX4_OPCODE_SEND_IMM: 713 wc->wc_flags |= IB_WC_WITH_IMM; 714 case MLX4_OPCODE_SEND: 715 case MLX4_OPCODE_SEND_INVAL: 716 wc->opcode = IB_WC_SEND; 717 break; 718 case MLX4_OPCODE_RDMA_READ: 719 wc->opcode = IB_WC_RDMA_READ; 720 wc->byte_len = be32_to_cpu(cqe->byte_cnt); 721 break; 722 case MLX4_OPCODE_ATOMIC_CS: 723 wc->opcode = IB_WC_COMP_SWAP; 724 wc->byte_len = 8; 725 break; 726 case MLX4_OPCODE_ATOMIC_FA: 727 wc->opcode = IB_WC_FETCH_ADD; 728 wc->byte_len = 8; 729 break; 730 case MLX4_OPCODE_MASKED_ATOMIC_CS: 731 wc->opcode = IB_WC_MASKED_COMP_SWAP; 732 wc->byte_len = 8; 733 break; 734 case MLX4_OPCODE_MASKED_ATOMIC_FA: 735 wc->opcode = IB_WC_MASKED_FETCH_ADD; 736 wc->byte_len = 8; 737 break; 738 case MLX4_OPCODE_BIND_MW: 739 wc->opcode = IB_WC_BIND_MW; 740 break; 741 case MLX4_OPCODE_LSO: 742 wc->opcode = IB_WC_LSO; 743 break; 744 case MLX4_OPCODE_FMR: 745 wc->opcode = IB_WC_FAST_REG_MR; 746 break; 747 case MLX4_OPCODE_LOCAL_INVAL: 748 wc->opcode = IB_WC_LOCAL_INV; 749 break; 750 } 751 } else { 752 wc->byte_len = be32_to_cpu(cqe->byte_cnt); 753 754 switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) { 755 case MLX4_RECV_OPCODE_RDMA_WRITE_IMM: 756 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM; 757 wc->wc_flags = IB_WC_WITH_IMM; 758 wc->ex.imm_data = cqe->immed_rss_invalid; 759 break; 760 case MLX4_RECV_OPCODE_SEND_INVAL: 761 wc->opcode = IB_WC_RECV; 762 wc->wc_flags = IB_WC_WITH_INVALIDATE; 763 wc->ex.invalidate_rkey = be32_to_cpu(cqe->immed_rss_invalid); 764 break; 765 case MLX4_RECV_OPCODE_SEND: 766 wc->opcode = IB_WC_RECV; 767 wc->wc_flags = 0; 768 break; 769 case MLX4_RECV_OPCODE_SEND_IMM: 770 wc->opcode = IB_WC_RECV; 771 wc->wc_flags = IB_WC_WITH_IMM; 772 wc->ex.imm_data = cqe->immed_rss_invalid; 773 break; 774 } 775 776 if (mlx4_is_mfunc(to_mdev(cq->ibcq.device)->dev)) { 777 if ((*cur_qp)->mlx4_ib_qp_type & 778 (MLX4_IB_QPT_PROXY_SMI_OWNER | 779 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) 780 return use_tunnel_data(*cur_qp, cq, wc, tail, cqe); 781 } 782 783 wc->slid = be16_to_cpu(cqe->rlid); 784 g_mlpath_rqpn = be32_to_cpu(cqe->g_mlpath_rqpn); 785 wc->src_qp = g_mlpath_rqpn & 0xffffff; 786 wc->dlid_path_bits = (g_mlpath_rqpn >> 24) & 0x7f; 787 wc->wc_flags |= g_mlpath_rqpn & 0x80000000 ? IB_WC_GRH : 0; 788 wc->pkey_index = be32_to_cpu(cqe->immed_rss_invalid) & 0x7f; 789 wc->wc_flags |= mlx4_ib_ipoib_csum_ok(cqe->status, 790 cqe->checksum) ? IB_WC_IP_CSUM_OK : 0; 791 if (rdma_port_get_link_layer(wc->qp->device, 792 (*cur_qp)->port) == IB_LINK_LAYER_ETHERNET) 793 wc->sl = be16_to_cpu(cqe->sl_vid) >> 13; 794 else 795 wc->sl = be16_to_cpu(cqe->sl_vid) >> 12; 796 } 797 798 return 0; 799 } 800 801 int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) 802 { 803 struct mlx4_ib_cq *cq = to_mcq(ibcq); 804 struct mlx4_ib_qp *cur_qp = NULL; 805 unsigned long flags; 806 int npolled; 807 int err = 0; 808 809 spin_lock_irqsave(&cq->lock, flags); 810 811 for (npolled = 0; npolled < num_entries; ++npolled) { 812 err = mlx4_ib_poll_one(cq, &cur_qp, wc + npolled); 813 if (err) 814 break; 815 } 816 817 mlx4_cq_set_ci(&cq->mcq); 818 819 spin_unlock_irqrestore(&cq->lock, flags); 820 821 if (err == 0 || err == -EAGAIN) 822 return npolled; 823 else 824 return err; 825 } 826 827 int mlx4_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) 828 { 829 mlx4_cq_arm(&to_mcq(ibcq)->mcq, 830 (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ? 831 MLX4_CQ_DB_REQ_NOT_SOL : MLX4_CQ_DB_REQ_NOT, 832 to_mdev(ibcq->device)->uar_map, 833 MLX4_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->uar_lock)); 834 835 return 0; 836 } 837 838 void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq) 839 { 840 u32 prod_index; 841 int nfreed = 0; 842 struct mlx4_cqe *cqe, *dest; 843 u8 owner_bit; 844 int cqe_inc = cq->buf.entry_size == 64 ? 1 : 0; 845 846 /* 847 * First we need to find the current producer index, so we 848 * know where to start cleaning from. It doesn't matter if HW 849 * adds new entries after this loop -- the QP we're worried 850 * about is already in RESET, so the new entries won't come 851 * from our QP and therefore don't need to be checked. 852 */ 853 for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); ++prod_index) 854 if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe) 855 break; 856 857 /* 858 * Now sweep backwards through the CQ, removing CQ entries 859 * that match our QP by copying older entries on top of them. 860 */ 861 while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) { 862 cqe = get_cqe(cq, prod_index & cq->ibcq.cqe); 863 cqe += cqe_inc; 864 865 if ((be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK) == qpn) { 866 if (srq && !(cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK)) 867 mlx4_ib_free_srq_wqe(srq, be16_to_cpu(cqe->wqe_index)); 868 ++nfreed; 869 } else if (nfreed) { 870 dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe); 871 dest += cqe_inc; 872 873 owner_bit = dest->owner_sr_opcode & MLX4_CQE_OWNER_MASK; 874 memcpy(dest, cqe, sizeof *cqe); 875 dest->owner_sr_opcode = owner_bit | 876 (dest->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK); 877 } 878 } 879 880 if (nfreed) { 881 cq->mcq.cons_index += nfreed; 882 /* 883 * Make sure update of buffer contents is done before 884 * updating consumer index. 885 */ 886 wmb(); 887 mlx4_cq_set_ci(&cq->mcq); 888 } 889 } 890 891 void mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq) 892 { 893 spin_lock_irq(&cq->lock); 894 __mlx4_ib_cq_clean(cq, qpn, srq); 895 spin_unlock_irq(&cq->lock); 896 } 897