1/* 2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33#include <linux/kref.h> 34#include <rdma/ib_umem.h> 35#include <rdma/ib_user_verbs.h> 36#include "mlx5_ib.h" 37#include "user.h" 38 39static void mlx5_ib_cq_comp(struct mlx5_core_cq *cq) 40{ 41 struct ib_cq *ibcq = &to_mibcq(cq)->ibcq; 42 43 ibcq->comp_handler(ibcq, ibcq->cq_context); 44} 45 46static void mlx5_ib_cq_event(struct mlx5_core_cq *mcq, enum mlx5_event type) 47{ 48 struct mlx5_ib_cq *cq = container_of(mcq, struct mlx5_ib_cq, mcq); 49 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 50 struct ib_cq *ibcq = &cq->ibcq; 51 struct ib_event event; 52 53 if (type != MLX5_EVENT_TYPE_CQ_ERROR) { 54 mlx5_ib_warn(dev, "Unexpected event type %d on CQ %06x\n", 55 type, mcq->cqn); 56 return; 57 } 58 59 if (ibcq->event_handler) { 60 event.device = &dev->ib_dev; 61 event.event = IB_EVENT_CQ_ERR; 62 event.element.cq = ibcq; 63 ibcq->event_handler(&event, ibcq->cq_context); 64 } 65} 66 67static void *get_cqe_from_buf(struct mlx5_ib_cq_buf *buf, int n, int size) 68{ 69 return mlx5_buf_offset(&buf->buf, n * size); 70} 71 72static void *get_cqe(struct mlx5_ib_cq *cq, int n) 73{ 74 return get_cqe_from_buf(&cq->buf, n, cq->mcq.cqe_sz); 75} 76 77static u8 sw_ownership_bit(int n, int nent) 78{ 79 return (n & nent) ? 1 : 0; 80} 81 82static void *get_sw_cqe(struct mlx5_ib_cq *cq, int n) 83{ 84 void *cqe = get_cqe(cq, n & cq->ibcq.cqe); 85 struct mlx5_cqe64 *cqe64; 86 87 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; 88 89 if (likely((cqe64->op_own) >> 4 != MLX5_CQE_INVALID) && 90 !((cqe64->op_own & MLX5_CQE_OWNER_MASK) ^ !!(n & (cq->ibcq.cqe + 1)))) { 91 return cqe; 92 } else { 93 return NULL; 94 } 95} 96 97static void *next_cqe_sw(struct mlx5_ib_cq *cq) 98{ 99 return get_sw_cqe(cq, cq->mcq.cons_index); 100} 101 102static enum ib_wc_opcode get_umr_comp(struct mlx5_ib_wq *wq, int idx) 103{ 104 switch (wq->wr_data[idx]) { 105 case MLX5_IB_WR_UMR: 106 return 0; 107 108 case IB_WR_LOCAL_INV: 109 return IB_WC_LOCAL_INV; 110 111 case IB_WR_FAST_REG_MR: 112 return IB_WC_FAST_REG_MR; 113 114 default: 115 pr_warn("unknown completion status\n"); 116 return 0; 117 } 118} 119 120static void handle_good_req(struct ib_wc *wc, struct mlx5_cqe64 *cqe, 121 struct mlx5_ib_wq *wq, int idx) 122{ 123 wc->wc_flags = 0; 124 switch (be32_to_cpu(cqe->sop_drop_qpn) >> 24) { 125 case MLX5_OPCODE_RDMA_WRITE_IMM: 126 wc->wc_flags |= IB_WC_WITH_IMM; 127 case MLX5_OPCODE_RDMA_WRITE: 128 wc->opcode = IB_WC_RDMA_WRITE; 129 break; 130 case MLX5_OPCODE_SEND_IMM: 131 wc->wc_flags |= IB_WC_WITH_IMM; 132 case MLX5_OPCODE_SEND: 133 case MLX5_OPCODE_SEND_INVAL: 134 wc->opcode = IB_WC_SEND; 135 break; 136 case MLX5_OPCODE_RDMA_READ: 137 wc->opcode = IB_WC_RDMA_READ; 138 wc->byte_len = be32_to_cpu(cqe->byte_cnt); 139 break; 140 case MLX5_OPCODE_ATOMIC_CS: 141 wc->opcode = IB_WC_COMP_SWAP; 142 wc->byte_len = 8; 143 break; 144 case MLX5_OPCODE_ATOMIC_FA: 145 wc->opcode = IB_WC_FETCH_ADD; 146 wc->byte_len = 8; 147 break; 148 case MLX5_OPCODE_ATOMIC_MASKED_CS: 149 wc->opcode = IB_WC_MASKED_COMP_SWAP; 150 wc->byte_len = 8; 151 break; 152 case MLX5_OPCODE_ATOMIC_MASKED_FA: 153 wc->opcode = IB_WC_MASKED_FETCH_ADD; 154 wc->byte_len = 8; 155 break; 156 case MLX5_OPCODE_BIND_MW: 157 wc->opcode = IB_WC_BIND_MW; 158 break; 159 case MLX5_OPCODE_UMR: 160 wc->opcode = get_umr_comp(wq, idx); 161 break; 162 } 163} 164 165enum { 166 MLX5_GRH_IN_BUFFER = 1, 167 MLX5_GRH_IN_CQE = 2, 168}; 169 170static void handle_responder(struct ib_wc *wc, struct mlx5_cqe64 *cqe, 171 struct mlx5_ib_qp *qp) 172{ 173 struct mlx5_ib_dev *dev = to_mdev(qp->ibqp.device); 174 struct mlx5_ib_srq *srq; 175 struct mlx5_ib_wq *wq; 176 u16 wqe_ctr; 177 u8 g; 178 179 if (qp->ibqp.srq || qp->ibqp.xrcd) { 180 struct mlx5_core_srq *msrq = NULL; 181 182 if (qp->ibqp.xrcd) { 183 msrq = mlx5_core_get_srq(dev->mdev, 184 be32_to_cpu(cqe->srqn)); 185 srq = to_mibsrq(msrq); 186 } else { 187 srq = to_msrq(qp->ibqp.srq); 188 } 189 if (srq) { 190 wqe_ctr = be16_to_cpu(cqe->wqe_counter); 191 wc->wr_id = srq->wrid[wqe_ctr]; 192 mlx5_ib_free_srq_wqe(srq, wqe_ctr); 193 if (msrq && atomic_dec_and_test(&msrq->refcount)) 194 complete(&msrq->free); 195 } 196 } else { 197 wq = &qp->rq; 198 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; 199 ++wq->tail; 200 } 201 wc->byte_len = be32_to_cpu(cqe->byte_cnt); 202 203 switch (cqe->op_own >> 4) { 204 case MLX5_CQE_RESP_WR_IMM: 205 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM; 206 wc->wc_flags = IB_WC_WITH_IMM; 207 wc->ex.imm_data = cqe->imm_inval_pkey; 208 break; 209 case MLX5_CQE_RESP_SEND: 210 wc->opcode = IB_WC_RECV; 211 wc->wc_flags = 0; 212 break; 213 case MLX5_CQE_RESP_SEND_IMM: 214 wc->opcode = IB_WC_RECV; 215 wc->wc_flags = IB_WC_WITH_IMM; 216 wc->ex.imm_data = cqe->imm_inval_pkey; 217 break; 218 case MLX5_CQE_RESP_SEND_INV: 219 wc->opcode = IB_WC_RECV; 220 wc->wc_flags = IB_WC_WITH_INVALIDATE; 221 wc->ex.invalidate_rkey = be32_to_cpu(cqe->imm_inval_pkey); 222 break; 223 } 224 wc->slid = be16_to_cpu(cqe->slid); 225 wc->sl = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0xf; 226 wc->src_qp = be32_to_cpu(cqe->flags_rqpn) & 0xffffff; 227 wc->dlid_path_bits = cqe->ml_path; 228 g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3; 229 wc->wc_flags |= g ? IB_WC_GRH : 0; 230 wc->pkey_index = be32_to_cpu(cqe->imm_inval_pkey) & 0xffff; 231} 232 233static void dump_cqe(struct mlx5_ib_dev *dev, struct mlx5_err_cqe *cqe) 234{ 235 __be32 *p = (__be32 *)cqe; 236 int i; 237 238 mlx5_ib_warn(dev, "dump error cqe\n"); 239 for (i = 0; i < sizeof(*cqe) / 16; i++, p += 4) 240 pr_info("%08x %08x %08x %08x\n", be32_to_cpu(p[0]), 241 be32_to_cpu(p[1]), be32_to_cpu(p[2]), 242 be32_to_cpu(p[3])); 243} 244 245static void mlx5_handle_error_cqe(struct mlx5_ib_dev *dev, 246 struct mlx5_err_cqe *cqe, 247 struct ib_wc *wc) 248{ 249 int dump = 1; 250 251 switch (cqe->syndrome) { 252 case MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR: 253 wc->status = IB_WC_LOC_LEN_ERR; 254 break; 255 case MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR: 256 wc->status = IB_WC_LOC_QP_OP_ERR; 257 break; 258 case MLX5_CQE_SYNDROME_LOCAL_PROT_ERR: 259 wc->status = IB_WC_LOC_PROT_ERR; 260 break; 261 case MLX5_CQE_SYNDROME_WR_FLUSH_ERR: 262 dump = 0; 263 wc->status = IB_WC_WR_FLUSH_ERR; 264 break; 265 case MLX5_CQE_SYNDROME_MW_BIND_ERR: 266 wc->status = IB_WC_MW_BIND_ERR; 267 break; 268 case MLX5_CQE_SYNDROME_BAD_RESP_ERR: 269 wc->status = IB_WC_BAD_RESP_ERR; 270 break; 271 case MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR: 272 wc->status = IB_WC_LOC_ACCESS_ERR; 273 break; 274 case MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR: 275 wc->status = IB_WC_REM_INV_REQ_ERR; 276 break; 277 case MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR: 278 wc->status = IB_WC_REM_ACCESS_ERR; 279 break; 280 case MLX5_CQE_SYNDROME_REMOTE_OP_ERR: 281 wc->status = IB_WC_REM_OP_ERR; 282 break; 283 case MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR: 284 wc->status = IB_WC_RETRY_EXC_ERR; 285 dump = 0; 286 break; 287 case MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR: 288 wc->status = IB_WC_RNR_RETRY_EXC_ERR; 289 dump = 0; 290 break; 291 case MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR: 292 wc->status = IB_WC_REM_ABORT_ERR; 293 break; 294 default: 295 wc->status = IB_WC_GENERAL_ERR; 296 break; 297 } 298 299 wc->vendor_err = cqe->vendor_err_synd; 300 if (dump) 301 dump_cqe(dev, cqe); 302} 303 304static int is_atomic_response(struct mlx5_ib_qp *qp, uint16_t idx) 305{ 306 /* TBD: waiting decision 307 */ 308 return 0; 309} 310 311static void *mlx5_get_atomic_laddr(struct mlx5_ib_qp *qp, uint16_t idx) 312{ 313 struct mlx5_wqe_data_seg *dpseg; 314 void *addr; 315 316 dpseg = mlx5_get_send_wqe(qp, idx) + sizeof(struct mlx5_wqe_ctrl_seg) + 317 sizeof(struct mlx5_wqe_raddr_seg) + 318 sizeof(struct mlx5_wqe_atomic_seg); 319 addr = (void *)(unsigned long)be64_to_cpu(dpseg->addr); 320 return addr; 321} 322 323static void handle_atomic(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64, 324 uint16_t idx) 325{ 326 void *addr; 327 int byte_count; 328 int i; 329 330 if (!is_atomic_response(qp, idx)) 331 return; 332 333 byte_count = be32_to_cpu(cqe64->byte_cnt); 334 addr = mlx5_get_atomic_laddr(qp, idx); 335 336 if (byte_count == 4) { 337 *(uint32_t *)addr = be32_to_cpu(*((__be32 *)addr)); 338 } else { 339 for (i = 0; i < byte_count; i += 8) { 340 *(uint64_t *)addr = be64_to_cpu(*((__be64 *)addr)); 341 addr += 8; 342 } 343 } 344 345 return; 346} 347 348static void handle_atomics(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64, 349 u16 tail, u16 head) 350{ 351 u16 idx; 352 353 do { 354 idx = tail & (qp->sq.wqe_cnt - 1); 355 handle_atomic(qp, cqe64, idx); 356 if (idx == head) 357 break; 358 359 tail = qp->sq.w_list[idx].next; 360 } while (1); 361 tail = qp->sq.w_list[idx].next; 362 qp->sq.last_poll = tail; 363} 364 365static void free_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf) 366{ 367 mlx5_buf_free(dev->mdev, &buf->buf); 368} 369 370static void get_sig_err_item(struct mlx5_sig_err_cqe *cqe, 371 struct ib_sig_err *item) 372{ 373 u16 syndrome = be16_to_cpu(cqe->syndrome); 374 375#define GUARD_ERR (1 << 13) 376#define APPTAG_ERR (1 << 12) 377#define REFTAG_ERR (1 << 11) 378 379 if (syndrome & GUARD_ERR) { 380 item->err_type = IB_SIG_BAD_GUARD; 381 item->expected = be32_to_cpu(cqe->expected_trans_sig) >> 16; 382 item->actual = be32_to_cpu(cqe->actual_trans_sig) >> 16; 383 } else 384 if (syndrome & REFTAG_ERR) { 385 item->err_type = IB_SIG_BAD_REFTAG; 386 item->expected = be32_to_cpu(cqe->expected_reftag); 387 item->actual = be32_to_cpu(cqe->actual_reftag); 388 } else 389 if (syndrome & APPTAG_ERR) { 390 item->err_type = IB_SIG_BAD_APPTAG; 391 item->expected = be32_to_cpu(cqe->expected_trans_sig) & 0xffff; 392 item->actual = be32_to_cpu(cqe->actual_trans_sig) & 0xffff; 393 } else { 394 pr_err("Got signature completion error with bad syndrome %04x\n", 395 syndrome); 396 } 397 398 item->sig_err_offset = be64_to_cpu(cqe->err_offset); 399 item->key = be32_to_cpu(cqe->mkey); 400} 401 402static int mlx5_poll_one(struct mlx5_ib_cq *cq, 403 struct mlx5_ib_qp **cur_qp, 404 struct ib_wc *wc) 405{ 406 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 407 struct mlx5_err_cqe *err_cqe; 408 struct mlx5_cqe64 *cqe64; 409 struct mlx5_core_qp *mqp; 410 struct mlx5_ib_wq *wq; 411 struct mlx5_sig_err_cqe *sig_err_cqe; 412 struct mlx5_core_mr *mmr; 413 struct mlx5_ib_mr *mr; 414 uint8_t opcode; 415 uint32_t qpn; 416 u16 wqe_ctr; 417 void *cqe; 418 int idx; 419 420repoll: 421 cqe = next_cqe_sw(cq); 422 if (!cqe) 423 return -EAGAIN; 424 425 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; 426 427 ++cq->mcq.cons_index; 428 429 /* Make sure we read CQ entry contents after we've checked the 430 * ownership bit. 431 */ 432 rmb(); 433 434 opcode = cqe64->op_own >> 4; 435 if (unlikely(opcode == MLX5_CQE_RESIZE_CQ)) { 436 if (likely(cq->resize_buf)) { 437 free_cq_buf(dev, &cq->buf); 438 cq->buf = *cq->resize_buf; 439 kfree(cq->resize_buf); 440 cq->resize_buf = NULL; 441 goto repoll; 442 } else { 443 mlx5_ib_warn(dev, "unexpected resize cqe\n"); 444 } 445 } 446 447 qpn = ntohl(cqe64->sop_drop_qpn) & 0xffffff; 448 if (!*cur_qp || (qpn != (*cur_qp)->ibqp.qp_num)) { 449 /* We do not have to take the QP table lock here, 450 * because CQs will be locked while QPs are removed 451 * from the table. 452 */ 453 mqp = __mlx5_qp_lookup(dev->mdev, qpn); 454 if (unlikely(!mqp)) { 455 mlx5_ib_warn(dev, "CQE@CQ %06x for unknown QPN %6x\n", 456 cq->mcq.cqn, qpn); 457 return -EINVAL; 458 } 459 460 *cur_qp = to_mibqp(mqp); 461 } 462 463 wc->qp = &(*cur_qp)->ibqp; 464 switch (opcode) { 465 case MLX5_CQE_REQ: 466 wq = &(*cur_qp)->sq; 467 wqe_ctr = be16_to_cpu(cqe64->wqe_counter); 468 idx = wqe_ctr & (wq->wqe_cnt - 1); 469 handle_good_req(wc, cqe64, wq, idx); 470 handle_atomics(*cur_qp, cqe64, wq->last_poll, idx); 471 wc->wr_id = wq->wrid[idx]; 472 wq->tail = wq->wqe_head[idx] + 1; 473 wc->status = IB_WC_SUCCESS; 474 break; 475 case MLX5_CQE_RESP_WR_IMM: 476 case MLX5_CQE_RESP_SEND: 477 case MLX5_CQE_RESP_SEND_IMM: 478 case MLX5_CQE_RESP_SEND_INV: 479 handle_responder(wc, cqe64, *cur_qp); 480 wc->status = IB_WC_SUCCESS; 481 break; 482 case MLX5_CQE_RESIZE_CQ: 483 break; 484 case MLX5_CQE_REQ_ERR: 485 case MLX5_CQE_RESP_ERR: 486 err_cqe = (struct mlx5_err_cqe *)cqe64; 487 mlx5_handle_error_cqe(dev, err_cqe, wc); 488 mlx5_ib_dbg(dev, "%s error cqe on cqn 0x%x:\n", 489 opcode == MLX5_CQE_REQ_ERR ? 490 "Requestor" : "Responder", cq->mcq.cqn); 491 mlx5_ib_dbg(dev, "syndrome 0x%x, vendor syndrome 0x%x\n", 492 err_cqe->syndrome, err_cqe->vendor_err_synd); 493 if (opcode == MLX5_CQE_REQ_ERR) { 494 wq = &(*cur_qp)->sq; 495 wqe_ctr = be16_to_cpu(cqe64->wqe_counter); 496 idx = wqe_ctr & (wq->wqe_cnt - 1); 497 wc->wr_id = wq->wrid[idx]; 498 wq->tail = wq->wqe_head[idx] + 1; 499 } else { 500 struct mlx5_ib_srq *srq; 501 502 if ((*cur_qp)->ibqp.srq) { 503 srq = to_msrq((*cur_qp)->ibqp.srq); 504 wqe_ctr = be16_to_cpu(cqe64->wqe_counter); 505 wc->wr_id = srq->wrid[wqe_ctr]; 506 mlx5_ib_free_srq_wqe(srq, wqe_ctr); 507 } else { 508 wq = &(*cur_qp)->rq; 509 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; 510 ++wq->tail; 511 } 512 } 513 break; 514 case MLX5_CQE_SIG_ERR: 515 sig_err_cqe = (struct mlx5_sig_err_cqe *)cqe64; 516 517 read_lock(&dev->mdev->priv.mr_table.lock); 518 mmr = __mlx5_mr_lookup(dev->mdev, 519 mlx5_base_mkey(be32_to_cpu(sig_err_cqe->mkey))); 520 if (unlikely(!mmr)) { 521 read_unlock(&dev->mdev->priv.mr_table.lock); 522 mlx5_ib_warn(dev, "CQE@CQ %06x for unknown MR %6x\n", 523 cq->mcq.cqn, be32_to_cpu(sig_err_cqe->mkey)); 524 return -EINVAL; 525 } 526 527 mr = to_mibmr(mmr); 528 get_sig_err_item(sig_err_cqe, &mr->sig->err_item); 529 mr->sig->sig_err_exists = true; 530 mr->sig->sigerr_count++; 531 532 mlx5_ib_warn(dev, "CQN: 0x%x Got SIGERR on key: 0x%x err_type %x err_offset %llx expected %x actual %x\n", 533 cq->mcq.cqn, mr->sig->err_item.key, 534 mr->sig->err_item.err_type, 535 mr->sig->err_item.sig_err_offset, 536 mr->sig->err_item.expected, 537 mr->sig->err_item.actual); 538 539 read_unlock(&dev->mdev->priv.mr_table.lock); 540 goto repoll; 541 } 542 543 return 0; 544} 545 546int mlx5_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) 547{ 548 struct mlx5_ib_cq *cq = to_mcq(ibcq); 549 struct mlx5_ib_qp *cur_qp = NULL; 550 unsigned long flags; 551 int npolled; 552 int err = 0; 553 554 spin_lock_irqsave(&cq->lock, flags); 555 556 for (npolled = 0; npolled < num_entries; npolled++) { 557 err = mlx5_poll_one(cq, &cur_qp, wc + npolled); 558 if (err) 559 break; 560 } 561 562 if (npolled) 563 mlx5_cq_set_ci(&cq->mcq); 564 565 spin_unlock_irqrestore(&cq->lock, flags); 566 567 if (err == 0 || err == -EAGAIN) 568 return npolled; 569 else 570 return err; 571} 572 573int mlx5_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) 574{ 575 struct mlx5_core_dev *mdev = to_mdev(ibcq->device)->mdev; 576 void __iomem *uar_page = mdev->priv.uuari.uars[0].map; 577 578 mlx5_cq_arm(&to_mcq(ibcq)->mcq, 579 (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ? 580 MLX5_CQ_DB_REQ_NOT_SOL : MLX5_CQ_DB_REQ_NOT, 581 uar_page, 582 MLX5_GET_DOORBELL_LOCK(&mdev->priv.cq_uar_lock), 583 to_mcq(ibcq)->mcq.cons_index); 584 585 return 0; 586} 587 588static int alloc_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf, 589 int nent, int cqe_size) 590{ 591 int err; 592 593 err = mlx5_buf_alloc(dev->mdev, nent * cqe_size, 594 PAGE_SIZE * 2, &buf->buf); 595 if (err) 596 return err; 597 598 buf->cqe_size = cqe_size; 599 buf->nent = nent; 600 601 return 0; 602} 603 604static int create_cq_user(struct mlx5_ib_dev *dev, struct ib_udata *udata, 605 struct ib_ucontext *context, struct mlx5_ib_cq *cq, 606 int entries, struct mlx5_create_cq_mbox_in **cqb, 607 int *cqe_size, int *index, int *inlen) 608{ 609 struct mlx5_ib_create_cq ucmd; 610 size_t ucmdlen; 611 int page_shift; 612 int npages; 613 int ncont; 614 int err; 615 616 ucmdlen = 617 (udata->inlen - sizeof(struct ib_uverbs_cmd_hdr) < 618 sizeof(ucmd)) ? (sizeof(ucmd) - 619 sizeof(ucmd.reserved)) : sizeof(ucmd); 620 621 if (ib_copy_from_udata(&ucmd, udata, ucmdlen)) 622 return -EFAULT; 623 624 if (ucmdlen == sizeof(ucmd) && 625 ucmd.reserved != 0) 626 return -EINVAL; 627 628 if (ucmd.cqe_size != 64 && ucmd.cqe_size != 128) 629 return -EINVAL; 630 631 *cqe_size = ucmd.cqe_size; 632 633 cq->buf.umem = ib_umem_get(context, ucmd.buf_addr, 634 entries * ucmd.cqe_size, 635 IB_ACCESS_LOCAL_WRITE, 1); 636 if (IS_ERR(cq->buf.umem)) { 637 err = PTR_ERR(cq->buf.umem); 638 return err; 639 } 640 641 err = mlx5_ib_db_map_user(to_mucontext(context), ucmd.db_addr, 642 &cq->db); 643 if (err) 644 goto err_umem; 645 646 mlx5_ib_cont_pages(cq->buf.umem, ucmd.buf_addr, &npages, &page_shift, 647 &ncont, NULL); 648 mlx5_ib_dbg(dev, "addr 0x%llx, size %u, npages %d, page_shift %d, ncont %d\n", 649 ucmd.buf_addr, entries * ucmd.cqe_size, npages, page_shift, ncont); 650 651 *inlen = sizeof(**cqb) + sizeof(*(*cqb)->pas) * ncont; 652 *cqb = mlx5_vzalloc(*inlen); 653 if (!*cqb) { 654 err = -ENOMEM; 655 goto err_db; 656 } 657 mlx5_ib_populate_pas(dev, cq->buf.umem, page_shift, (*cqb)->pas, 0); 658 (*cqb)->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT; 659 660 *index = to_mucontext(context)->uuari.uars[0].index; 661 662 return 0; 663 664err_db: 665 mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db); 666 667err_umem: 668 ib_umem_release(cq->buf.umem); 669 return err; 670} 671 672static void destroy_cq_user(struct mlx5_ib_cq *cq, struct ib_ucontext *context) 673{ 674 mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db); 675 ib_umem_release(cq->buf.umem); 676} 677 678static void init_cq_buf(struct mlx5_ib_cq *cq, struct mlx5_ib_cq_buf *buf) 679{ 680 int i; 681 void *cqe; 682 struct mlx5_cqe64 *cqe64; 683 684 for (i = 0; i < buf->nent; i++) { 685 cqe = get_cqe_from_buf(buf, i, buf->cqe_size); 686 cqe64 = buf->cqe_size == 64 ? cqe : cqe + 64; 687 cqe64->op_own = MLX5_CQE_INVALID << 4; 688 } 689} 690 691static int create_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, 692 int entries, int cqe_size, 693 struct mlx5_create_cq_mbox_in **cqb, 694 int *index, int *inlen) 695{ 696 int err; 697 698 err = mlx5_db_alloc(dev->mdev, &cq->db); 699 if (err) 700 return err; 701 702 cq->mcq.set_ci_db = cq->db.db; 703 cq->mcq.arm_db = cq->db.db + 1; 704 cq->mcq.cqe_sz = cqe_size; 705 706 err = alloc_cq_buf(dev, &cq->buf, entries, cqe_size); 707 if (err) 708 goto err_db; 709 710 init_cq_buf(cq, &cq->buf); 711 712 *inlen = sizeof(**cqb) + sizeof(*(*cqb)->pas) * cq->buf.buf.npages; 713 *cqb = mlx5_vzalloc(*inlen); 714 if (!*cqb) { 715 err = -ENOMEM; 716 goto err_buf; 717 } 718 mlx5_fill_page_array(&cq->buf.buf, (*cqb)->pas); 719 720 (*cqb)->ctx.log_pg_sz = cq->buf.buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT; 721 *index = dev->mdev->priv.uuari.uars[0].index; 722 723 return 0; 724 725err_buf: 726 free_cq_buf(dev, &cq->buf); 727 728err_db: 729 mlx5_db_free(dev->mdev, &cq->db); 730 return err; 731} 732 733static void destroy_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq) 734{ 735 free_cq_buf(dev, &cq->buf); 736 mlx5_db_free(dev->mdev, &cq->db); 737} 738 739struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev, int entries, 740 int vector, struct ib_ucontext *context, 741 struct ib_udata *udata) 742{ 743 struct mlx5_create_cq_mbox_in *cqb = NULL; 744 struct mlx5_ib_dev *dev = to_mdev(ibdev); 745 struct mlx5_ib_cq *cq; 746 int uninitialized_var(index); 747 int uninitialized_var(inlen); 748 int cqe_size; 749 int irqn; 750 int eqn; 751 int err; 752 753 if (entries < 0) 754 return ERR_PTR(-EINVAL); 755 756 entries = roundup_pow_of_two(entries + 1); 757 if (entries > dev->mdev->caps.gen.max_cqes) 758 return ERR_PTR(-EINVAL); 759 760 cq = kzalloc(sizeof(*cq), GFP_KERNEL); 761 if (!cq) 762 return ERR_PTR(-ENOMEM); 763 764 cq->ibcq.cqe = entries - 1; 765 mutex_init(&cq->resize_mutex); 766 spin_lock_init(&cq->lock); 767 cq->resize_buf = NULL; 768 cq->resize_umem = NULL; 769 770 if (context) { 771 err = create_cq_user(dev, udata, context, cq, entries, 772 &cqb, &cqe_size, &index, &inlen); 773 if (err) 774 goto err_create; 775 } else { 776 /* for now choose 64 bytes till we have a proper interface */ 777 cqe_size = 64; 778 err = create_cq_kernel(dev, cq, entries, cqe_size, &cqb, 779 &index, &inlen); 780 if (err) 781 goto err_create; 782 } 783 784 cq->cqe_size = cqe_size; 785 cqb->ctx.cqe_sz_flags = cqe_sz_to_mlx_sz(cqe_size) << 5; 786 cqb->ctx.log_sz_usr_page = cpu_to_be32((ilog2(entries) << 24) | index); 787 err = mlx5_vector2eqn(dev->mdev, vector, &eqn, &irqn); 788 if (err) 789 goto err_cqb; 790 791 cqb->ctx.c_eqn = cpu_to_be16(eqn); 792 cqb->ctx.db_record_addr = cpu_to_be64(cq->db.dma); 793 794 err = mlx5_core_create_cq(dev->mdev, &cq->mcq, cqb, inlen); 795 if (err) 796 goto err_cqb; 797 798 mlx5_ib_dbg(dev, "cqn 0x%x\n", cq->mcq.cqn); 799 cq->mcq.irqn = irqn; 800 cq->mcq.comp = mlx5_ib_cq_comp; 801 cq->mcq.event = mlx5_ib_cq_event; 802 803 if (context) 804 if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof(__u32))) { 805 err = -EFAULT; 806 goto err_cmd; 807 } 808 809 810 kvfree(cqb); 811 return &cq->ibcq; 812 813err_cmd: 814 mlx5_core_destroy_cq(dev->mdev, &cq->mcq); 815 816err_cqb: 817 kvfree(cqb); 818 if (context) 819 destroy_cq_user(cq, context); 820 else 821 destroy_cq_kernel(dev, cq); 822 823err_create: 824 kfree(cq); 825 826 return ERR_PTR(err); 827} 828 829 830int mlx5_ib_destroy_cq(struct ib_cq *cq) 831{ 832 struct mlx5_ib_dev *dev = to_mdev(cq->device); 833 struct mlx5_ib_cq *mcq = to_mcq(cq); 834 struct ib_ucontext *context = NULL; 835 836 if (cq->uobject) 837 context = cq->uobject->context; 838 839 mlx5_core_destroy_cq(dev->mdev, &mcq->mcq); 840 if (context) 841 destroy_cq_user(mcq, context); 842 else 843 destroy_cq_kernel(dev, mcq); 844 845 kfree(mcq); 846 847 return 0; 848} 849 850static int is_equal_rsn(struct mlx5_cqe64 *cqe64, u32 rsn) 851{ 852 return rsn == (ntohl(cqe64->sop_drop_qpn) & 0xffffff); 853} 854 855void __mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 rsn, struct mlx5_ib_srq *srq) 856{ 857 struct mlx5_cqe64 *cqe64, *dest64; 858 void *cqe, *dest; 859 u32 prod_index; 860 int nfreed = 0; 861 u8 owner_bit; 862 863 if (!cq) 864 return; 865 866 /* First we need to find the current producer index, so we 867 * know where to start cleaning from. It doesn't matter if HW 868 * adds new entries after this loop -- the QP we're worried 869 * about is already in RESET, so the new entries won't come 870 * from our QP and therefore don't need to be checked. 871 */ 872 for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); prod_index++) 873 if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe) 874 break; 875 876 /* Now sweep backwards through the CQ, removing CQ entries 877 * that match our QP by copying older entries on top of them. 878 */ 879 while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) { 880 cqe = get_cqe(cq, prod_index & cq->ibcq.cqe); 881 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; 882 if (is_equal_rsn(cqe64, rsn)) { 883 if (srq && (ntohl(cqe64->srqn) & 0xffffff)) 884 mlx5_ib_free_srq_wqe(srq, be16_to_cpu(cqe64->wqe_counter)); 885 ++nfreed; 886 } else if (nfreed) { 887 dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe); 888 dest64 = (cq->mcq.cqe_sz == 64) ? dest : dest + 64; 889 owner_bit = dest64->op_own & MLX5_CQE_OWNER_MASK; 890 memcpy(dest, cqe, cq->mcq.cqe_sz); 891 dest64->op_own = owner_bit | 892 (dest64->op_own & ~MLX5_CQE_OWNER_MASK); 893 } 894 } 895 896 if (nfreed) { 897 cq->mcq.cons_index += nfreed; 898 /* Make sure update of buffer contents is done before 899 * updating consumer index. 900 */ 901 wmb(); 902 mlx5_cq_set_ci(&cq->mcq); 903 } 904} 905 906void mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 qpn, struct mlx5_ib_srq *srq) 907{ 908 if (!cq) 909 return; 910 911 spin_lock_irq(&cq->lock); 912 __mlx5_ib_cq_clean(cq, qpn, srq); 913 spin_unlock_irq(&cq->lock); 914} 915 916int mlx5_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) 917{ 918 struct mlx5_modify_cq_mbox_in *in; 919 struct mlx5_ib_dev *dev = to_mdev(cq->device); 920 struct mlx5_ib_cq *mcq = to_mcq(cq); 921 int err; 922 u32 fsel; 923 924 if (!(dev->mdev->caps.gen.flags & MLX5_DEV_CAP_FLAG_CQ_MODER)) 925 return -ENOSYS; 926 927 in = kzalloc(sizeof(*in), GFP_KERNEL); 928 if (!in) 929 return -ENOMEM; 930 931 in->cqn = cpu_to_be32(mcq->mcq.cqn); 932 fsel = (MLX5_CQ_MODIFY_PERIOD | MLX5_CQ_MODIFY_COUNT); 933 in->ctx.cq_period = cpu_to_be16(cq_period); 934 in->ctx.cq_max_count = cpu_to_be16(cq_count); 935 in->field_select = cpu_to_be32(fsel); 936 err = mlx5_core_modify_cq(dev->mdev, &mcq->mcq, in, sizeof(*in)); 937 kfree(in); 938 939 if (err) 940 mlx5_ib_warn(dev, "modify cq 0x%x failed\n", mcq->mcq.cqn); 941 942 return err; 943} 944 945static int resize_user(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, 946 int entries, struct ib_udata *udata, int *npas, 947 int *page_shift, int *cqe_size) 948{ 949 struct mlx5_ib_resize_cq ucmd; 950 struct ib_umem *umem; 951 int err; 952 int npages; 953 struct ib_ucontext *context = cq->buf.umem->context; 954 955 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)); 956 if (err) 957 return err; 958 959 if (ucmd.reserved0 || ucmd.reserved1) 960 return -EINVAL; 961 962 umem = ib_umem_get(context, ucmd.buf_addr, entries * ucmd.cqe_size, 963 IB_ACCESS_LOCAL_WRITE, 1); 964 if (IS_ERR(umem)) { 965 err = PTR_ERR(umem); 966 return err; 967 } 968 969 mlx5_ib_cont_pages(umem, ucmd.buf_addr, &npages, page_shift, 970 npas, NULL); 971 972 cq->resize_umem = umem; 973 *cqe_size = ucmd.cqe_size; 974 975 return 0; 976} 977 978static void un_resize_user(struct mlx5_ib_cq *cq) 979{ 980 ib_umem_release(cq->resize_umem); 981} 982 983static int resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, 984 int entries, int cqe_size) 985{ 986 int err; 987 988 cq->resize_buf = kzalloc(sizeof(*cq->resize_buf), GFP_KERNEL); 989 if (!cq->resize_buf) 990 return -ENOMEM; 991 992 err = alloc_cq_buf(dev, cq->resize_buf, entries, cqe_size); 993 if (err) 994 goto ex; 995 996 init_cq_buf(cq, cq->resize_buf); 997 998 return 0; 999 1000ex: 1001 kfree(cq->resize_buf); 1002 return err; 1003} 1004 1005static void un_resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq) 1006{ 1007 free_cq_buf(dev, cq->resize_buf); 1008 cq->resize_buf = NULL; 1009} 1010 1011static int copy_resize_cqes(struct mlx5_ib_cq *cq) 1012{ 1013 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 1014 struct mlx5_cqe64 *scqe64; 1015 struct mlx5_cqe64 *dcqe64; 1016 void *start_cqe; 1017 void *scqe; 1018 void *dcqe; 1019 int ssize; 1020 int dsize; 1021 int i; 1022 u8 sw_own; 1023 1024 ssize = cq->buf.cqe_size; 1025 dsize = cq->resize_buf->cqe_size; 1026 if (ssize != dsize) { 1027 mlx5_ib_warn(dev, "resize from different cqe size is not supported\n"); 1028 return -EINVAL; 1029 } 1030 1031 i = cq->mcq.cons_index; 1032 scqe = get_sw_cqe(cq, i); 1033 scqe64 = ssize == 64 ? scqe : scqe + 64; 1034 start_cqe = scqe; 1035 if (!scqe) { 1036 mlx5_ib_warn(dev, "expected cqe in sw ownership\n"); 1037 return -EINVAL; 1038 } 1039 1040 while ((scqe64->op_own >> 4) != MLX5_CQE_RESIZE_CQ) { 1041 dcqe = get_cqe_from_buf(cq->resize_buf, 1042 (i + 1) & (cq->resize_buf->nent), 1043 dsize); 1044 dcqe64 = dsize == 64 ? dcqe : dcqe + 64; 1045 sw_own = sw_ownership_bit(i + 1, cq->resize_buf->nent); 1046 memcpy(dcqe, scqe, dsize); 1047 dcqe64->op_own = (dcqe64->op_own & ~MLX5_CQE_OWNER_MASK) | sw_own; 1048 1049 ++i; 1050 scqe = get_sw_cqe(cq, i); 1051 scqe64 = ssize == 64 ? scqe : scqe + 64; 1052 if (!scqe) { 1053 mlx5_ib_warn(dev, "expected cqe in sw ownership\n"); 1054 return -EINVAL; 1055 } 1056 1057 if (scqe == start_cqe) { 1058 pr_warn("resize CQ failed to get resize CQE, CQN 0x%x\n", 1059 cq->mcq.cqn); 1060 return -ENOMEM; 1061 } 1062 } 1063 ++cq->mcq.cons_index; 1064 return 0; 1065} 1066 1067int mlx5_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) 1068{ 1069 struct mlx5_ib_dev *dev = to_mdev(ibcq->device); 1070 struct mlx5_ib_cq *cq = to_mcq(ibcq); 1071 struct mlx5_modify_cq_mbox_in *in; 1072 int err; 1073 int npas; 1074 int page_shift; 1075 int inlen; 1076 int uninitialized_var(cqe_size); 1077 unsigned long flags; 1078 1079 if (!(dev->mdev->caps.gen.flags & MLX5_DEV_CAP_FLAG_RESIZE_CQ)) { 1080 pr_info("Firmware does not support resize CQ\n"); 1081 return -ENOSYS; 1082 } 1083 1084 if (entries < 1) 1085 return -EINVAL; 1086 1087 entries = roundup_pow_of_two(entries + 1); 1088 if (entries > dev->mdev->caps.gen.max_cqes + 1) 1089 return -EINVAL; 1090 1091 if (entries == ibcq->cqe + 1) 1092 return 0; 1093 1094 mutex_lock(&cq->resize_mutex); 1095 if (udata) { 1096 err = resize_user(dev, cq, entries, udata, &npas, &page_shift, 1097 &cqe_size); 1098 } else { 1099 cqe_size = 64; 1100 err = resize_kernel(dev, cq, entries, cqe_size); 1101 if (!err) { 1102 npas = cq->resize_buf->buf.npages; 1103 page_shift = cq->resize_buf->buf.page_shift; 1104 } 1105 } 1106 1107 if (err) 1108 goto ex; 1109 1110 inlen = sizeof(*in) + npas * sizeof(in->pas[0]); 1111 in = mlx5_vzalloc(inlen); 1112 if (!in) { 1113 err = -ENOMEM; 1114 goto ex_resize; 1115 } 1116 1117 if (udata) 1118 mlx5_ib_populate_pas(dev, cq->resize_umem, page_shift, 1119 in->pas, 0); 1120 else 1121 mlx5_fill_page_array(&cq->resize_buf->buf, in->pas); 1122 1123 in->field_select = cpu_to_be32(MLX5_MODIFY_CQ_MASK_LOG_SIZE | 1124 MLX5_MODIFY_CQ_MASK_PG_OFFSET | 1125 MLX5_MODIFY_CQ_MASK_PG_SIZE); 1126 in->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT; 1127 in->ctx.cqe_sz_flags = cqe_sz_to_mlx_sz(cqe_size) << 5; 1128 in->ctx.page_offset = 0; 1129 in->ctx.log_sz_usr_page = cpu_to_be32(ilog2(entries) << 24); 1130 in->hdr.opmod = cpu_to_be16(MLX5_CQ_OPMOD_RESIZE); 1131 in->cqn = cpu_to_be32(cq->mcq.cqn); 1132 1133 err = mlx5_core_modify_cq(dev->mdev, &cq->mcq, in, inlen); 1134 if (err) 1135 goto ex_alloc; 1136 1137 if (udata) { 1138 cq->ibcq.cqe = entries - 1; 1139 ib_umem_release(cq->buf.umem); 1140 cq->buf.umem = cq->resize_umem; 1141 cq->resize_umem = NULL; 1142 } else { 1143 struct mlx5_ib_cq_buf tbuf; 1144 int resized = 0; 1145 1146 spin_lock_irqsave(&cq->lock, flags); 1147 if (cq->resize_buf) { 1148 err = copy_resize_cqes(cq); 1149 if (!err) { 1150 tbuf = cq->buf; 1151 cq->buf = *cq->resize_buf; 1152 kfree(cq->resize_buf); 1153 cq->resize_buf = NULL; 1154 resized = 1; 1155 } 1156 } 1157 cq->ibcq.cqe = entries - 1; 1158 spin_unlock_irqrestore(&cq->lock, flags); 1159 if (resized) 1160 free_cq_buf(dev, &tbuf); 1161 } 1162 mutex_unlock(&cq->resize_mutex); 1163 1164 kvfree(in); 1165 return 0; 1166 1167ex_alloc: 1168 kvfree(in); 1169 1170ex_resize: 1171 if (udata) 1172 un_resize_user(cq); 1173 else 1174 un_resize_kernel(dev, cq); 1175ex: 1176 mutex_unlock(&cq->resize_mutex); 1177 return err; 1178} 1179 1180int mlx5_ib_get_cqe_size(struct mlx5_ib_dev *dev, struct ib_cq *ibcq) 1181{ 1182 struct mlx5_ib_cq *cq; 1183 1184 if (!ibcq) 1185 return 128; 1186 1187 cq = to_mcq(ibcq); 1188 return cq->cqe_size; 1189} 1190