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 <rdma/ib_cache.h> 37 #include "mlx5_ib.h" 38 #include "user.h" 39 40 static void mlx5_ib_cq_comp(struct mlx5_core_cq *cq) 41 { 42 struct ib_cq *ibcq = &to_mibcq(cq)->ibcq; 43 44 ibcq->comp_handler(ibcq, ibcq->cq_context); 45 } 46 47 static void mlx5_ib_cq_event(struct mlx5_core_cq *mcq, enum mlx5_event type) 48 { 49 struct mlx5_ib_cq *cq = container_of(mcq, struct mlx5_ib_cq, mcq); 50 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 51 struct ib_cq *ibcq = &cq->ibcq; 52 struct ib_event event; 53 54 if (type != MLX5_EVENT_TYPE_CQ_ERROR) { 55 mlx5_ib_warn(dev, "Unexpected event type %d on CQ %06x\n", 56 type, mcq->cqn); 57 return; 58 } 59 60 if (ibcq->event_handler) { 61 event.device = &dev->ib_dev; 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 mlx5_ib_cq_buf *buf, int n, int size) 69 { 70 return mlx5_buf_offset(&buf->buf, n * size); 71 } 72 73 static void *get_cqe(struct mlx5_ib_cq *cq, int n) 74 { 75 return get_cqe_from_buf(&cq->buf, n, cq->mcq.cqe_sz); 76 } 77 78 static u8 sw_ownership_bit(int n, int nent) 79 { 80 return (n & nent) ? 1 : 0; 81 } 82 83 static void *get_sw_cqe(struct mlx5_ib_cq *cq, int n) 84 { 85 void *cqe = get_cqe(cq, n & cq->ibcq.cqe); 86 struct mlx5_cqe64 *cqe64; 87 88 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; 89 90 if (likely((cqe64->op_own) >> 4 != MLX5_CQE_INVALID) && 91 !((cqe64->op_own & MLX5_CQE_OWNER_MASK) ^ !!(n & (cq->ibcq.cqe + 1)))) { 92 return cqe; 93 } else { 94 return NULL; 95 } 96 } 97 98 static void *next_cqe_sw(struct mlx5_ib_cq *cq) 99 { 100 return get_sw_cqe(cq, cq->mcq.cons_index); 101 } 102 103 static enum ib_wc_opcode get_umr_comp(struct mlx5_ib_wq *wq, int idx) 104 { 105 switch (wq->wr_data[idx]) { 106 case MLX5_IB_WR_UMR: 107 return 0; 108 109 case IB_WR_LOCAL_INV: 110 return IB_WC_LOCAL_INV; 111 112 case IB_WR_REG_MR: 113 return IB_WC_REG_MR; 114 115 default: 116 pr_warn("unknown completion status\n"); 117 return 0; 118 } 119 } 120 121 static void handle_good_req(struct ib_wc *wc, struct mlx5_cqe64 *cqe, 122 struct mlx5_ib_wq *wq, int idx) 123 { 124 wc->wc_flags = 0; 125 switch (be32_to_cpu(cqe->sop_drop_qpn) >> 24) { 126 case MLX5_OPCODE_RDMA_WRITE_IMM: 127 wc->wc_flags |= IB_WC_WITH_IMM; 128 case MLX5_OPCODE_RDMA_WRITE: 129 wc->opcode = IB_WC_RDMA_WRITE; 130 break; 131 case MLX5_OPCODE_SEND_IMM: 132 wc->wc_flags |= IB_WC_WITH_IMM; 133 case MLX5_OPCODE_SEND: 134 case MLX5_OPCODE_SEND_INVAL: 135 wc->opcode = IB_WC_SEND; 136 break; 137 case MLX5_OPCODE_RDMA_READ: 138 wc->opcode = IB_WC_RDMA_READ; 139 wc->byte_len = be32_to_cpu(cqe->byte_cnt); 140 break; 141 case MLX5_OPCODE_ATOMIC_CS: 142 wc->opcode = IB_WC_COMP_SWAP; 143 wc->byte_len = 8; 144 break; 145 case MLX5_OPCODE_ATOMIC_FA: 146 wc->opcode = IB_WC_FETCH_ADD; 147 wc->byte_len = 8; 148 break; 149 case MLX5_OPCODE_ATOMIC_MASKED_CS: 150 wc->opcode = IB_WC_MASKED_COMP_SWAP; 151 wc->byte_len = 8; 152 break; 153 case MLX5_OPCODE_ATOMIC_MASKED_FA: 154 wc->opcode = IB_WC_MASKED_FETCH_ADD; 155 wc->byte_len = 8; 156 break; 157 case MLX5_OPCODE_UMR: 158 wc->opcode = get_umr_comp(wq, idx); 159 break; 160 } 161 } 162 163 enum { 164 MLX5_GRH_IN_BUFFER = 1, 165 MLX5_GRH_IN_CQE = 2, 166 }; 167 168 static void handle_responder(struct ib_wc *wc, struct mlx5_cqe64 *cqe, 169 struct mlx5_ib_qp *qp) 170 { 171 enum rdma_link_layer ll = rdma_port_get_link_layer(qp->ibqp.device, 1); 172 struct mlx5_ib_dev *dev = to_mdev(qp->ibqp.device); 173 struct mlx5_ib_srq *srq; 174 struct mlx5_ib_wq *wq; 175 u16 wqe_ctr; 176 u8 g; 177 178 if (qp->ibqp.srq || qp->ibqp.xrcd) { 179 struct mlx5_core_srq *msrq = NULL; 180 181 if (qp->ibqp.xrcd) { 182 msrq = mlx5_core_get_srq(dev->mdev, 183 be32_to_cpu(cqe->srqn)); 184 srq = to_mibsrq(msrq); 185 } else { 186 srq = to_msrq(qp->ibqp.srq); 187 } 188 if (srq) { 189 wqe_ctr = be16_to_cpu(cqe->wqe_counter); 190 wc->wr_id = srq->wrid[wqe_ctr]; 191 mlx5_ib_free_srq_wqe(srq, wqe_ctr); 192 if (msrq && atomic_dec_and_test(&msrq->refcount)) 193 complete(&msrq->free); 194 } 195 } else { 196 wq = &qp->rq; 197 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; 198 ++wq->tail; 199 } 200 wc->byte_len = be32_to_cpu(cqe->byte_cnt); 201 202 switch (cqe->op_own >> 4) { 203 case MLX5_CQE_RESP_WR_IMM: 204 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM; 205 wc->wc_flags = IB_WC_WITH_IMM; 206 wc->ex.imm_data = cqe->imm_inval_pkey; 207 break; 208 case MLX5_CQE_RESP_SEND: 209 wc->opcode = IB_WC_RECV; 210 wc->wc_flags = IB_WC_IP_CSUM_OK; 211 if (unlikely(!((cqe->hds_ip_ext & CQE_L3_OK) && 212 (cqe->hds_ip_ext & CQE_L4_OK)))) 213 wc->wc_flags = 0; 214 break; 215 case MLX5_CQE_RESP_SEND_IMM: 216 wc->opcode = IB_WC_RECV; 217 wc->wc_flags = IB_WC_WITH_IMM; 218 wc->ex.imm_data = cqe->imm_inval_pkey; 219 break; 220 case MLX5_CQE_RESP_SEND_INV: 221 wc->opcode = IB_WC_RECV; 222 wc->wc_flags = IB_WC_WITH_INVALIDATE; 223 wc->ex.invalidate_rkey = be32_to_cpu(cqe->imm_inval_pkey); 224 break; 225 } 226 wc->slid = be16_to_cpu(cqe->slid); 227 wc->sl = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0xf; 228 wc->src_qp = be32_to_cpu(cqe->flags_rqpn) & 0xffffff; 229 wc->dlid_path_bits = cqe->ml_path; 230 g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3; 231 wc->wc_flags |= g ? IB_WC_GRH : 0; 232 if (unlikely(is_qp1(qp->ibqp.qp_type))) { 233 u16 pkey = be32_to_cpu(cqe->imm_inval_pkey) & 0xffff; 234 235 ib_find_cached_pkey(&dev->ib_dev, qp->port, pkey, 236 &wc->pkey_index); 237 } else { 238 wc->pkey_index = 0; 239 } 240 241 if (ll != IB_LINK_LAYER_ETHERNET) 242 return; 243 244 switch (wc->sl & 0x3) { 245 case MLX5_CQE_ROCE_L3_HEADER_TYPE_GRH: 246 wc->network_hdr_type = RDMA_NETWORK_IB; 247 break; 248 case MLX5_CQE_ROCE_L3_HEADER_TYPE_IPV6: 249 wc->network_hdr_type = RDMA_NETWORK_IPV6; 250 break; 251 case MLX5_CQE_ROCE_L3_HEADER_TYPE_IPV4: 252 wc->network_hdr_type = RDMA_NETWORK_IPV4; 253 break; 254 } 255 wc->wc_flags |= IB_WC_WITH_NETWORK_HDR_TYPE; 256 } 257 258 static void dump_cqe(struct mlx5_ib_dev *dev, struct mlx5_err_cqe *cqe) 259 { 260 __be32 *p = (__be32 *)cqe; 261 int i; 262 263 mlx5_ib_warn(dev, "dump error cqe\n"); 264 for (i = 0; i < sizeof(*cqe) / 16; i++, p += 4) 265 pr_info("%08x %08x %08x %08x\n", be32_to_cpu(p[0]), 266 be32_to_cpu(p[1]), be32_to_cpu(p[2]), 267 be32_to_cpu(p[3])); 268 } 269 270 static void mlx5_handle_error_cqe(struct mlx5_ib_dev *dev, 271 struct mlx5_err_cqe *cqe, 272 struct ib_wc *wc) 273 { 274 int dump = 1; 275 276 switch (cqe->syndrome) { 277 case MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR: 278 wc->status = IB_WC_LOC_LEN_ERR; 279 break; 280 case MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR: 281 wc->status = IB_WC_LOC_QP_OP_ERR; 282 break; 283 case MLX5_CQE_SYNDROME_LOCAL_PROT_ERR: 284 wc->status = IB_WC_LOC_PROT_ERR; 285 break; 286 case MLX5_CQE_SYNDROME_WR_FLUSH_ERR: 287 dump = 0; 288 wc->status = IB_WC_WR_FLUSH_ERR; 289 break; 290 case MLX5_CQE_SYNDROME_MW_BIND_ERR: 291 wc->status = IB_WC_MW_BIND_ERR; 292 break; 293 case MLX5_CQE_SYNDROME_BAD_RESP_ERR: 294 wc->status = IB_WC_BAD_RESP_ERR; 295 break; 296 case MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR: 297 wc->status = IB_WC_LOC_ACCESS_ERR; 298 break; 299 case MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR: 300 wc->status = IB_WC_REM_INV_REQ_ERR; 301 break; 302 case MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR: 303 wc->status = IB_WC_REM_ACCESS_ERR; 304 break; 305 case MLX5_CQE_SYNDROME_REMOTE_OP_ERR: 306 wc->status = IB_WC_REM_OP_ERR; 307 break; 308 case MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR: 309 wc->status = IB_WC_RETRY_EXC_ERR; 310 dump = 0; 311 break; 312 case MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR: 313 wc->status = IB_WC_RNR_RETRY_EXC_ERR; 314 dump = 0; 315 break; 316 case MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR: 317 wc->status = IB_WC_REM_ABORT_ERR; 318 break; 319 default: 320 wc->status = IB_WC_GENERAL_ERR; 321 break; 322 } 323 324 wc->vendor_err = cqe->vendor_err_synd; 325 if (dump) 326 dump_cqe(dev, cqe); 327 } 328 329 static int is_atomic_response(struct mlx5_ib_qp *qp, uint16_t idx) 330 { 331 /* TBD: waiting decision 332 */ 333 return 0; 334 } 335 336 static void *mlx5_get_atomic_laddr(struct mlx5_ib_qp *qp, uint16_t idx) 337 { 338 struct mlx5_wqe_data_seg *dpseg; 339 void *addr; 340 341 dpseg = mlx5_get_send_wqe(qp, idx) + sizeof(struct mlx5_wqe_ctrl_seg) + 342 sizeof(struct mlx5_wqe_raddr_seg) + 343 sizeof(struct mlx5_wqe_atomic_seg); 344 addr = (void *)(unsigned long)be64_to_cpu(dpseg->addr); 345 return addr; 346 } 347 348 static void handle_atomic(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64, 349 uint16_t idx) 350 { 351 void *addr; 352 int byte_count; 353 int i; 354 355 if (!is_atomic_response(qp, idx)) 356 return; 357 358 byte_count = be32_to_cpu(cqe64->byte_cnt); 359 addr = mlx5_get_atomic_laddr(qp, idx); 360 361 if (byte_count == 4) { 362 *(uint32_t *)addr = be32_to_cpu(*((__be32 *)addr)); 363 } else { 364 for (i = 0; i < byte_count; i += 8) { 365 *(uint64_t *)addr = be64_to_cpu(*((__be64 *)addr)); 366 addr += 8; 367 } 368 } 369 370 return; 371 } 372 373 static void handle_atomics(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64, 374 u16 tail, u16 head) 375 { 376 u16 idx; 377 378 do { 379 idx = tail & (qp->sq.wqe_cnt - 1); 380 handle_atomic(qp, cqe64, idx); 381 if (idx == head) 382 break; 383 384 tail = qp->sq.w_list[idx].next; 385 } while (1); 386 tail = qp->sq.w_list[idx].next; 387 qp->sq.last_poll = tail; 388 } 389 390 static void free_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf) 391 { 392 mlx5_buf_free(dev->mdev, &buf->buf); 393 } 394 395 static void get_sig_err_item(struct mlx5_sig_err_cqe *cqe, 396 struct ib_sig_err *item) 397 { 398 u16 syndrome = be16_to_cpu(cqe->syndrome); 399 400 #define GUARD_ERR (1 << 13) 401 #define APPTAG_ERR (1 << 12) 402 #define REFTAG_ERR (1 << 11) 403 404 if (syndrome & GUARD_ERR) { 405 item->err_type = IB_SIG_BAD_GUARD; 406 item->expected = be32_to_cpu(cqe->expected_trans_sig) >> 16; 407 item->actual = be32_to_cpu(cqe->actual_trans_sig) >> 16; 408 } else 409 if (syndrome & REFTAG_ERR) { 410 item->err_type = IB_SIG_BAD_REFTAG; 411 item->expected = be32_to_cpu(cqe->expected_reftag); 412 item->actual = be32_to_cpu(cqe->actual_reftag); 413 } else 414 if (syndrome & APPTAG_ERR) { 415 item->err_type = IB_SIG_BAD_APPTAG; 416 item->expected = be32_to_cpu(cqe->expected_trans_sig) & 0xffff; 417 item->actual = be32_to_cpu(cqe->actual_trans_sig) & 0xffff; 418 } else { 419 pr_err("Got signature completion error with bad syndrome %04x\n", 420 syndrome); 421 } 422 423 item->sig_err_offset = be64_to_cpu(cqe->err_offset); 424 item->key = be32_to_cpu(cqe->mkey); 425 } 426 427 static int mlx5_poll_one(struct mlx5_ib_cq *cq, 428 struct mlx5_ib_qp **cur_qp, 429 struct ib_wc *wc) 430 { 431 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 432 struct mlx5_err_cqe *err_cqe; 433 struct mlx5_cqe64 *cqe64; 434 struct mlx5_core_qp *mqp; 435 struct mlx5_ib_wq *wq; 436 struct mlx5_sig_err_cqe *sig_err_cqe; 437 struct mlx5_core_mkey *mmkey; 438 struct mlx5_ib_mr *mr; 439 uint8_t opcode; 440 uint32_t qpn; 441 u16 wqe_ctr; 442 void *cqe; 443 int idx; 444 445 repoll: 446 cqe = next_cqe_sw(cq); 447 if (!cqe) 448 return -EAGAIN; 449 450 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; 451 452 ++cq->mcq.cons_index; 453 454 /* Make sure we read CQ entry contents after we've checked the 455 * ownership bit. 456 */ 457 rmb(); 458 459 opcode = cqe64->op_own >> 4; 460 if (unlikely(opcode == MLX5_CQE_RESIZE_CQ)) { 461 if (likely(cq->resize_buf)) { 462 free_cq_buf(dev, &cq->buf); 463 cq->buf = *cq->resize_buf; 464 kfree(cq->resize_buf); 465 cq->resize_buf = NULL; 466 goto repoll; 467 } else { 468 mlx5_ib_warn(dev, "unexpected resize cqe\n"); 469 } 470 } 471 472 qpn = ntohl(cqe64->sop_drop_qpn) & 0xffffff; 473 if (!*cur_qp || (qpn != (*cur_qp)->ibqp.qp_num)) { 474 /* We do not have to take the QP table lock here, 475 * because CQs will be locked while QPs are removed 476 * from the table. 477 */ 478 mqp = __mlx5_qp_lookup(dev->mdev, qpn); 479 if (unlikely(!mqp)) { 480 mlx5_ib_warn(dev, "CQE@CQ %06x for unknown QPN %6x\n", 481 cq->mcq.cqn, qpn); 482 return -EINVAL; 483 } 484 485 *cur_qp = to_mibqp(mqp); 486 } 487 488 wc->qp = &(*cur_qp)->ibqp; 489 switch (opcode) { 490 case MLX5_CQE_REQ: 491 wq = &(*cur_qp)->sq; 492 wqe_ctr = be16_to_cpu(cqe64->wqe_counter); 493 idx = wqe_ctr & (wq->wqe_cnt - 1); 494 handle_good_req(wc, cqe64, wq, idx); 495 handle_atomics(*cur_qp, cqe64, wq->last_poll, idx); 496 wc->wr_id = wq->wrid[idx]; 497 wq->tail = wq->wqe_head[idx] + 1; 498 wc->status = IB_WC_SUCCESS; 499 break; 500 case MLX5_CQE_RESP_WR_IMM: 501 case MLX5_CQE_RESP_SEND: 502 case MLX5_CQE_RESP_SEND_IMM: 503 case MLX5_CQE_RESP_SEND_INV: 504 handle_responder(wc, cqe64, *cur_qp); 505 wc->status = IB_WC_SUCCESS; 506 break; 507 case MLX5_CQE_RESIZE_CQ: 508 break; 509 case MLX5_CQE_REQ_ERR: 510 case MLX5_CQE_RESP_ERR: 511 err_cqe = (struct mlx5_err_cqe *)cqe64; 512 mlx5_handle_error_cqe(dev, err_cqe, wc); 513 mlx5_ib_dbg(dev, "%s error cqe on cqn 0x%x:\n", 514 opcode == MLX5_CQE_REQ_ERR ? 515 "Requestor" : "Responder", cq->mcq.cqn); 516 mlx5_ib_dbg(dev, "syndrome 0x%x, vendor syndrome 0x%x\n", 517 err_cqe->syndrome, err_cqe->vendor_err_synd); 518 if (opcode == MLX5_CQE_REQ_ERR) { 519 wq = &(*cur_qp)->sq; 520 wqe_ctr = be16_to_cpu(cqe64->wqe_counter); 521 idx = wqe_ctr & (wq->wqe_cnt - 1); 522 wc->wr_id = wq->wrid[idx]; 523 wq->tail = wq->wqe_head[idx] + 1; 524 } else { 525 struct mlx5_ib_srq *srq; 526 527 if ((*cur_qp)->ibqp.srq) { 528 srq = to_msrq((*cur_qp)->ibqp.srq); 529 wqe_ctr = be16_to_cpu(cqe64->wqe_counter); 530 wc->wr_id = srq->wrid[wqe_ctr]; 531 mlx5_ib_free_srq_wqe(srq, wqe_ctr); 532 } else { 533 wq = &(*cur_qp)->rq; 534 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; 535 ++wq->tail; 536 } 537 } 538 break; 539 case MLX5_CQE_SIG_ERR: 540 sig_err_cqe = (struct mlx5_sig_err_cqe *)cqe64; 541 542 read_lock(&dev->mdev->priv.mkey_table.lock); 543 mmkey = __mlx5_mr_lookup(dev->mdev, 544 mlx5_base_mkey(be32_to_cpu(sig_err_cqe->mkey))); 545 if (unlikely(!mmkey)) { 546 read_unlock(&dev->mdev->priv.mkey_table.lock); 547 mlx5_ib_warn(dev, "CQE@CQ %06x for unknown MR %6x\n", 548 cq->mcq.cqn, be32_to_cpu(sig_err_cqe->mkey)); 549 return -EINVAL; 550 } 551 552 mr = to_mibmr(mmkey); 553 get_sig_err_item(sig_err_cqe, &mr->sig->err_item); 554 mr->sig->sig_err_exists = true; 555 mr->sig->sigerr_count++; 556 557 mlx5_ib_warn(dev, "CQN: 0x%x Got SIGERR on key: 0x%x err_type %x err_offset %llx expected %x actual %x\n", 558 cq->mcq.cqn, mr->sig->err_item.key, 559 mr->sig->err_item.err_type, 560 mr->sig->err_item.sig_err_offset, 561 mr->sig->err_item.expected, 562 mr->sig->err_item.actual); 563 564 read_unlock(&dev->mdev->priv.mkey_table.lock); 565 goto repoll; 566 } 567 568 return 0; 569 } 570 571 static int poll_soft_wc(struct mlx5_ib_cq *cq, int num_entries, 572 struct ib_wc *wc) 573 { 574 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 575 struct mlx5_ib_wc *soft_wc, *next; 576 int npolled = 0; 577 578 list_for_each_entry_safe(soft_wc, next, &cq->wc_list, list) { 579 if (npolled >= num_entries) 580 break; 581 582 mlx5_ib_dbg(dev, "polled software generated completion on CQ 0x%x\n", 583 cq->mcq.cqn); 584 585 wc[npolled++] = soft_wc->wc; 586 list_del(&soft_wc->list); 587 kfree(soft_wc); 588 } 589 590 return npolled; 591 } 592 593 int mlx5_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) 594 { 595 struct mlx5_ib_cq *cq = to_mcq(ibcq); 596 struct mlx5_ib_qp *cur_qp = NULL; 597 unsigned long flags; 598 int soft_polled = 0; 599 int npolled; 600 int err = 0; 601 602 spin_lock_irqsave(&cq->lock, flags); 603 604 if (unlikely(!list_empty(&cq->wc_list))) 605 soft_polled = poll_soft_wc(cq, num_entries, wc); 606 607 for (npolled = 0; npolled < num_entries - soft_polled; npolled++) { 608 err = mlx5_poll_one(cq, &cur_qp, wc + soft_polled + npolled); 609 if (err) 610 break; 611 } 612 613 if (npolled) 614 mlx5_cq_set_ci(&cq->mcq); 615 616 spin_unlock_irqrestore(&cq->lock, flags); 617 618 if (err == 0 || err == -EAGAIN) 619 return soft_polled + npolled; 620 else 621 return err; 622 } 623 624 int mlx5_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) 625 { 626 struct mlx5_core_dev *mdev = to_mdev(ibcq->device)->mdev; 627 struct mlx5_ib_cq *cq = to_mcq(ibcq); 628 void __iomem *uar_page = mdev->priv.uuari.uars[0].map; 629 unsigned long irq_flags; 630 int ret = 0; 631 632 spin_lock_irqsave(&cq->lock, irq_flags); 633 if (cq->notify_flags != IB_CQ_NEXT_COMP) 634 cq->notify_flags = flags & IB_CQ_SOLICITED_MASK; 635 636 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !list_empty(&cq->wc_list)) 637 ret = 1; 638 spin_unlock_irqrestore(&cq->lock, irq_flags); 639 640 mlx5_cq_arm(&cq->mcq, 641 (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ? 642 MLX5_CQ_DB_REQ_NOT_SOL : MLX5_CQ_DB_REQ_NOT, 643 uar_page, 644 MLX5_GET_DOORBELL_LOCK(&mdev->priv.cq_uar_lock), 645 to_mcq(ibcq)->mcq.cons_index); 646 647 return ret; 648 } 649 650 static int alloc_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf, 651 int nent, int cqe_size) 652 { 653 int err; 654 655 err = mlx5_buf_alloc(dev->mdev, nent * cqe_size, &buf->buf); 656 if (err) 657 return err; 658 659 buf->cqe_size = cqe_size; 660 buf->nent = nent; 661 662 return 0; 663 } 664 665 static int create_cq_user(struct mlx5_ib_dev *dev, struct ib_udata *udata, 666 struct ib_ucontext *context, struct mlx5_ib_cq *cq, 667 int entries, struct mlx5_create_cq_mbox_in **cqb, 668 int *cqe_size, int *index, int *inlen) 669 { 670 struct mlx5_ib_create_cq ucmd; 671 size_t ucmdlen; 672 int page_shift; 673 int npages; 674 int ncont; 675 int err; 676 677 ucmdlen = 678 (udata->inlen - sizeof(struct ib_uverbs_cmd_hdr) < 679 sizeof(ucmd)) ? (sizeof(ucmd) - 680 sizeof(ucmd.reserved)) : sizeof(ucmd); 681 682 if (ib_copy_from_udata(&ucmd, udata, ucmdlen)) 683 return -EFAULT; 684 685 if (ucmdlen == sizeof(ucmd) && 686 ucmd.reserved != 0) 687 return -EINVAL; 688 689 if (ucmd.cqe_size != 64 && ucmd.cqe_size != 128) 690 return -EINVAL; 691 692 *cqe_size = ucmd.cqe_size; 693 694 cq->buf.umem = ib_umem_get(context, ucmd.buf_addr, 695 entries * ucmd.cqe_size, 696 IB_ACCESS_LOCAL_WRITE, 1); 697 if (IS_ERR(cq->buf.umem)) { 698 err = PTR_ERR(cq->buf.umem); 699 return err; 700 } 701 702 err = mlx5_ib_db_map_user(to_mucontext(context), ucmd.db_addr, 703 &cq->db); 704 if (err) 705 goto err_umem; 706 707 mlx5_ib_cont_pages(cq->buf.umem, ucmd.buf_addr, &npages, &page_shift, 708 &ncont, NULL); 709 mlx5_ib_dbg(dev, "addr 0x%llx, size %u, npages %d, page_shift %d, ncont %d\n", 710 ucmd.buf_addr, entries * ucmd.cqe_size, npages, page_shift, ncont); 711 712 *inlen = sizeof(**cqb) + sizeof(*(*cqb)->pas) * ncont; 713 *cqb = mlx5_vzalloc(*inlen); 714 if (!*cqb) { 715 err = -ENOMEM; 716 goto err_db; 717 } 718 mlx5_ib_populate_pas(dev, cq->buf.umem, page_shift, (*cqb)->pas, 0); 719 (*cqb)->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT; 720 721 *index = to_mucontext(context)->uuari.uars[0].index; 722 723 return 0; 724 725 err_db: 726 mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db); 727 728 err_umem: 729 ib_umem_release(cq->buf.umem); 730 return err; 731 } 732 733 static void destroy_cq_user(struct mlx5_ib_cq *cq, struct ib_ucontext *context) 734 { 735 mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db); 736 ib_umem_release(cq->buf.umem); 737 } 738 739 static void init_cq_buf(struct mlx5_ib_cq *cq, struct mlx5_ib_cq_buf *buf) 740 { 741 int i; 742 void *cqe; 743 struct mlx5_cqe64 *cqe64; 744 745 for (i = 0; i < buf->nent; i++) { 746 cqe = get_cqe_from_buf(buf, i, buf->cqe_size); 747 cqe64 = buf->cqe_size == 64 ? cqe : cqe + 64; 748 cqe64->op_own = MLX5_CQE_INVALID << 4; 749 } 750 } 751 752 static int create_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, 753 int entries, int cqe_size, 754 struct mlx5_create_cq_mbox_in **cqb, 755 int *index, int *inlen) 756 { 757 int err; 758 759 err = mlx5_db_alloc(dev->mdev, &cq->db); 760 if (err) 761 return err; 762 763 cq->mcq.set_ci_db = cq->db.db; 764 cq->mcq.arm_db = cq->db.db + 1; 765 cq->mcq.cqe_sz = cqe_size; 766 767 err = alloc_cq_buf(dev, &cq->buf, entries, cqe_size); 768 if (err) 769 goto err_db; 770 771 init_cq_buf(cq, &cq->buf); 772 773 *inlen = sizeof(**cqb) + sizeof(*(*cqb)->pas) * cq->buf.buf.npages; 774 *cqb = mlx5_vzalloc(*inlen); 775 if (!*cqb) { 776 err = -ENOMEM; 777 goto err_buf; 778 } 779 mlx5_fill_page_array(&cq->buf.buf, (*cqb)->pas); 780 781 (*cqb)->ctx.log_pg_sz = cq->buf.buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT; 782 *index = dev->mdev->priv.uuari.uars[0].index; 783 784 return 0; 785 786 err_buf: 787 free_cq_buf(dev, &cq->buf); 788 789 err_db: 790 mlx5_db_free(dev->mdev, &cq->db); 791 return err; 792 } 793 794 static void destroy_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq) 795 { 796 free_cq_buf(dev, &cq->buf); 797 mlx5_db_free(dev->mdev, &cq->db); 798 } 799 800 static void notify_soft_wc_handler(struct work_struct *work) 801 { 802 struct mlx5_ib_cq *cq = container_of(work, struct mlx5_ib_cq, 803 notify_work); 804 805 cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context); 806 } 807 808 struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev, 809 const struct ib_cq_init_attr *attr, 810 struct ib_ucontext *context, 811 struct ib_udata *udata) 812 { 813 int entries = attr->cqe; 814 int vector = attr->comp_vector; 815 struct mlx5_create_cq_mbox_in *cqb = NULL; 816 struct mlx5_ib_dev *dev = to_mdev(ibdev); 817 struct mlx5_ib_cq *cq; 818 int uninitialized_var(index); 819 int uninitialized_var(inlen); 820 int cqe_size; 821 unsigned int irqn; 822 int eqn; 823 int err; 824 825 if (entries < 0 || 826 (entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz)))) 827 return ERR_PTR(-EINVAL); 828 829 if (check_cq_create_flags(attr->flags)) 830 return ERR_PTR(-EOPNOTSUPP); 831 832 entries = roundup_pow_of_two(entries + 1); 833 if (entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz))) 834 return ERR_PTR(-EINVAL); 835 836 cq = kzalloc(sizeof(*cq), GFP_KERNEL); 837 if (!cq) 838 return ERR_PTR(-ENOMEM); 839 840 cq->ibcq.cqe = entries - 1; 841 mutex_init(&cq->resize_mutex); 842 spin_lock_init(&cq->lock); 843 cq->resize_buf = NULL; 844 cq->resize_umem = NULL; 845 cq->create_flags = attr->flags; 846 847 if (context) { 848 err = create_cq_user(dev, udata, context, cq, entries, 849 &cqb, &cqe_size, &index, &inlen); 850 if (err) 851 goto err_create; 852 } else { 853 /* for now choose 64 bytes till we have a proper interface */ 854 cqe_size = 64; 855 err = create_cq_kernel(dev, cq, entries, cqe_size, &cqb, 856 &index, &inlen); 857 if (err) 858 goto err_create; 859 860 INIT_WORK(&cq->notify_work, notify_soft_wc_handler); 861 } 862 863 cq->cqe_size = cqe_size; 864 cqb->ctx.cqe_sz_flags = cqe_sz_to_mlx_sz(cqe_size) << 5; 865 866 if (cq->create_flags & IB_CQ_FLAGS_IGNORE_OVERRUN) 867 cqb->ctx.cqe_sz_flags |= (1 << 1); 868 869 cqb->ctx.log_sz_usr_page = cpu_to_be32((ilog2(entries) << 24) | index); 870 err = mlx5_vector2eqn(dev->mdev, vector, &eqn, &irqn); 871 if (err) 872 goto err_cqb; 873 874 cqb->ctx.c_eqn = cpu_to_be16(eqn); 875 cqb->ctx.db_record_addr = cpu_to_be64(cq->db.dma); 876 877 err = mlx5_core_create_cq(dev->mdev, &cq->mcq, cqb, inlen); 878 if (err) 879 goto err_cqb; 880 881 mlx5_ib_dbg(dev, "cqn 0x%x\n", cq->mcq.cqn); 882 cq->mcq.irqn = irqn; 883 if (context) 884 cq->mcq.tasklet_ctx.comp = mlx5_ib_cq_comp; 885 else 886 cq->mcq.comp = mlx5_ib_cq_comp; 887 cq->mcq.event = mlx5_ib_cq_event; 888 889 INIT_LIST_HEAD(&cq->wc_list); 890 891 if (context) 892 if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof(__u32))) { 893 err = -EFAULT; 894 goto err_cmd; 895 } 896 897 898 kvfree(cqb); 899 return &cq->ibcq; 900 901 err_cmd: 902 mlx5_core_destroy_cq(dev->mdev, &cq->mcq); 903 904 err_cqb: 905 kvfree(cqb); 906 if (context) 907 destroy_cq_user(cq, context); 908 else 909 destroy_cq_kernel(dev, cq); 910 911 err_create: 912 kfree(cq); 913 914 return ERR_PTR(err); 915 } 916 917 918 int mlx5_ib_destroy_cq(struct ib_cq *cq) 919 { 920 struct mlx5_ib_dev *dev = to_mdev(cq->device); 921 struct mlx5_ib_cq *mcq = to_mcq(cq); 922 struct ib_ucontext *context = NULL; 923 924 if (cq->uobject) 925 context = cq->uobject->context; 926 927 mlx5_core_destroy_cq(dev->mdev, &mcq->mcq); 928 if (context) 929 destroy_cq_user(mcq, context); 930 else 931 destroy_cq_kernel(dev, mcq); 932 933 kfree(mcq); 934 935 return 0; 936 } 937 938 static int is_equal_rsn(struct mlx5_cqe64 *cqe64, u32 rsn) 939 { 940 return rsn == (ntohl(cqe64->sop_drop_qpn) & 0xffffff); 941 } 942 943 void __mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 rsn, struct mlx5_ib_srq *srq) 944 { 945 struct mlx5_cqe64 *cqe64, *dest64; 946 void *cqe, *dest; 947 u32 prod_index; 948 int nfreed = 0; 949 u8 owner_bit; 950 951 if (!cq) 952 return; 953 954 /* First we need to find the current producer index, so we 955 * know where to start cleaning from. It doesn't matter if HW 956 * adds new entries after this loop -- the QP we're worried 957 * about is already in RESET, so the new entries won't come 958 * from our QP and therefore don't need to be checked. 959 */ 960 for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); prod_index++) 961 if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe) 962 break; 963 964 /* Now sweep backwards through the CQ, removing CQ entries 965 * that match our QP by copying older entries on top of them. 966 */ 967 while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) { 968 cqe = get_cqe(cq, prod_index & cq->ibcq.cqe); 969 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; 970 if (is_equal_rsn(cqe64, rsn)) { 971 if (srq && (ntohl(cqe64->srqn) & 0xffffff)) 972 mlx5_ib_free_srq_wqe(srq, be16_to_cpu(cqe64->wqe_counter)); 973 ++nfreed; 974 } else if (nfreed) { 975 dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe); 976 dest64 = (cq->mcq.cqe_sz == 64) ? dest : dest + 64; 977 owner_bit = dest64->op_own & MLX5_CQE_OWNER_MASK; 978 memcpy(dest, cqe, cq->mcq.cqe_sz); 979 dest64->op_own = owner_bit | 980 (dest64->op_own & ~MLX5_CQE_OWNER_MASK); 981 } 982 } 983 984 if (nfreed) { 985 cq->mcq.cons_index += nfreed; 986 /* Make sure update of buffer contents is done before 987 * updating consumer index. 988 */ 989 wmb(); 990 mlx5_cq_set_ci(&cq->mcq); 991 } 992 } 993 994 void mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 qpn, struct mlx5_ib_srq *srq) 995 { 996 if (!cq) 997 return; 998 999 spin_lock_irq(&cq->lock); 1000 __mlx5_ib_cq_clean(cq, qpn, srq); 1001 spin_unlock_irq(&cq->lock); 1002 } 1003 1004 int mlx5_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) 1005 { 1006 struct mlx5_modify_cq_mbox_in *in; 1007 struct mlx5_ib_dev *dev = to_mdev(cq->device); 1008 struct mlx5_ib_cq *mcq = to_mcq(cq); 1009 int err; 1010 u32 fsel; 1011 1012 if (!MLX5_CAP_GEN(dev->mdev, cq_moderation)) 1013 return -ENOSYS; 1014 1015 in = kzalloc(sizeof(*in), GFP_KERNEL); 1016 if (!in) 1017 return -ENOMEM; 1018 1019 in->cqn = cpu_to_be32(mcq->mcq.cqn); 1020 fsel = (MLX5_CQ_MODIFY_PERIOD | MLX5_CQ_MODIFY_COUNT); 1021 in->ctx.cq_period = cpu_to_be16(cq_period); 1022 in->ctx.cq_max_count = cpu_to_be16(cq_count); 1023 in->field_select = cpu_to_be32(fsel); 1024 err = mlx5_core_modify_cq(dev->mdev, &mcq->mcq, in, sizeof(*in)); 1025 kfree(in); 1026 1027 if (err) 1028 mlx5_ib_warn(dev, "modify cq 0x%x failed\n", mcq->mcq.cqn); 1029 1030 return err; 1031 } 1032 1033 static int resize_user(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, 1034 int entries, struct ib_udata *udata, int *npas, 1035 int *page_shift, int *cqe_size) 1036 { 1037 struct mlx5_ib_resize_cq ucmd; 1038 struct ib_umem *umem; 1039 int err; 1040 int npages; 1041 struct ib_ucontext *context = cq->buf.umem->context; 1042 1043 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)); 1044 if (err) 1045 return err; 1046 1047 if (ucmd.reserved0 || ucmd.reserved1) 1048 return -EINVAL; 1049 1050 umem = ib_umem_get(context, ucmd.buf_addr, entries * ucmd.cqe_size, 1051 IB_ACCESS_LOCAL_WRITE, 1); 1052 if (IS_ERR(umem)) { 1053 err = PTR_ERR(umem); 1054 return err; 1055 } 1056 1057 mlx5_ib_cont_pages(umem, ucmd.buf_addr, &npages, page_shift, 1058 npas, NULL); 1059 1060 cq->resize_umem = umem; 1061 *cqe_size = ucmd.cqe_size; 1062 1063 return 0; 1064 } 1065 1066 static void un_resize_user(struct mlx5_ib_cq *cq) 1067 { 1068 ib_umem_release(cq->resize_umem); 1069 } 1070 1071 static int resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, 1072 int entries, int cqe_size) 1073 { 1074 int err; 1075 1076 cq->resize_buf = kzalloc(sizeof(*cq->resize_buf), GFP_KERNEL); 1077 if (!cq->resize_buf) 1078 return -ENOMEM; 1079 1080 err = alloc_cq_buf(dev, cq->resize_buf, entries, cqe_size); 1081 if (err) 1082 goto ex; 1083 1084 init_cq_buf(cq, cq->resize_buf); 1085 1086 return 0; 1087 1088 ex: 1089 kfree(cq->resize_buf); 1090 return err; 1091 } 1092 1093 static void un_resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq) 1094 { 1095 free_cq_buf(dev, cq->resize_buf); 1096 cq->resize_buf = NULL; 1097 } 1098 1099 static int copy_resize_cqes(struct mlx5_ib_cq *cq) 1100 { 1101 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 1102 struct mlx5_cqe64 *scqe64; 1103 struct mlx5_cqe64 *dcqe64; 1104 void *start_cqe; 1105 void *scqe; 1106 void *dcqe; 1107 int ssize; 1108 int dsize; 1109 int i; 1110 u8 sw_own; 1111 1112 ssize = cq->buf.cqe_size; 1113 dsize = cq->resize_buf->cqe_size; 1114 if (ssize != dsize) { 1115 mlx5_ib_warn(dev, "resize from different cqe size is not supported\n"); 1116 return -EINVAL; 1117 } 1118 1119 i = cq->mcq.cons_index; 1120 scqe = get_sw_cqe(cq, i); 1121 scqe64 = ssize == 64 ? scqe : scqe + 64; 1122 start_cqe = scqe; 1123 if (!scqe) { 1124 mlx5_ib_warn(dev, "expected cqe in sw ownership\n"); 1125 return -EINVAL; 1126 } 1127 1128 while ((scqe64->op_own >> 4) != MLX5_CQE_RESIZE_CQ) { 1129 dcqe = get_cqe_from_buf(cq->resize_buf, 1130 (i + 1) & (cq->resize_buf->nent), 1131 dsize); 1132 dcqe64 = dsize == 64 ? dcqe : dcqe + 64; 1133 sw_own = sw_ownership_bit(i + 1, cq->resize_buf->nent); 1134 memcpy(dcqe, scqe, dsize); 1135 dcqe64->op_own = (dcqe64->op_own & ~MLX5_CQE_OWNER_MASK) | sw_own; 1136 1137 ++i; 1138 scqe = get_sw_cqe(cq, i); 1139 scqe64 = ssize == 64 ? scqe : scqe + 64; 1140 if (!scqe) { 1141 mlx5_ib_warn(dev, "expected cqe in sw ownership\n"); 1142 return -EINVAL; 1143 } 1144 1145 if (scqe == start_cqe) { 1146 pr_warn("resize CQ failed to get resize CQE, CQN 0x%x\n", 1147 cq->mcq.cqn); 1148 return -ENOMEM; 1149 } 1150 } 1151 ++cq->mcq.cons_index; 1152 return 0; 1153 } 1154 1155 int mlx5_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) 1156 { 1157 struct mlx5_ib_dev *dev = to_mdev(ibcq->device); 1158 struct mlx5_ib_cq *cq = to_mcq(ibcq); 1159 struct mlx5_modify_cq_mbox_in *in; 1160 int err; 1161 int npas; 1162 int page_shift; 1163 int inlen; 1164 int uninitialized_var(cqe_size); 1165 unsigned long flags; 1166 1167 if (!MLX5_CAP_GEN(dev->mdev, cq_resize)) { 1168 pr_info("Firmware does not support resize CQ\n"); 1169 return -ENOSYS; 1170 } 1171 1172 if (entries < 1 || 1173 entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz))) { 1174 mlx5_ib_warn(dev, "wrong entries number %d, max %d\n", 1175 entries, 1176 1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz)); 1177 return -EINVAL; 1178 } 1179 1180 entries = roundup_pow_of_two(entries + 1); 1181 if (entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz)) + 1) 1182 return -EINVAL; 1183 1184 if (entries == ibcq->cqe + 1) 1185 return 0; 1186 1187 mutex_lock(&cq->resize_mutex); 1188 if (udata) { 1189 err = resize_user(dev, cq, entries, udata, &npas, &page_shift, 1190 &cqe_size); 1191 } else { 1192 cqe_size = 64; 1193 err = resize_kernel(dev, cq, entries, cqe_size); 1194 if (!err) { 1195 npas = cq->resize_buf->buf.npages; 1196 page_shift = cq->resize_buf->buf.page_shift; 1197 } 1198 } 1199 1200 if (err) 1201 goto ex; 1202 1203 inlen = sizeof(*in) + npas * sizeof(in->pas[0]); 1204 in = mlx5_vzalloc(inlen); 1205 if (!in) { 1206 err = -ENOMEM; 1207 goto ex_resize; 1208 } 1209 1210 if (udata) 1211 mlx5_ib_populate_pas(dev, cq->resize_umem, page_shift, 1212 in->pas, 0); 1213 else 1214 mlx5_fill_page_array(&cq->resize_buf->buf, in->pas); 1215 1216 in->field_select = cpu_to_be32(MLX5_MODIFY_CQ_MASK_LOG_SIZE | 1217 MLX5_MODIFY_CQ_MASK_PG_OFFSET | 1218 MLX5_MODIFY_CQ_MASK_PG_SIZE); 1219 in->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT; 1220 in->ctx.cqe_sz_flags = cqe_sz_to_mlx_sz(cqe_size) << 5; 1221 in->ctx.page_offset = 0; 1222 in->ctx.log_sz_usr_page = cpu_to_be32(ilog2(entries) << 24); 1223 in->hdr.opmod = cpu_to_be16(MLX5_CQ_OPMOD_RESIZE); 1224 in->cqn = cpu_to_be32(cq->mcq.cqn); 1225 1226 err = mlx5_core_modify_cq(dev->mdev, &cq->mcq, in, inlen); 1227 if (err) 1228 goto ex_alloc; 1229 1230 if (udata) { 1231 cq->ibcq.cqe = entries - 1; 1232 ib_umem_release(cq->buf.umem); 1233 cq->buf.umem = cq->resize_umem; 1234 cq->resize_umem = NULL; 1235 } else { 1236 struct mlx5_ib_cq_buf tbuf; 1237 int resized = 0; 1238 1239 spin_lock_irqsave(&cq->lock, flags); 1240 if (cq->resize_buf) { 1241 err = copy_resize_cqes(cq); 1242 if (!err) { 1243 tbuf = cq->buf; 1244 cq->buf = *cq->resize_buf; 1245 kfree(cq->resize_buf); 1246 cq->resize_buf = NULL; 1247 resized = 1; 1248 } 1249 } 1250 cq->ibcq.cqe = entries - 1; 1251 spin_unlock_irqrestore(&cq->lock, flags); 1252 if (resized) 1253 free_cq_buf(dev, &tbuf); 1254 } 1255 mutex_unlock(&cq->resize_mutex); 1256 1257 kvfree(in); 1258 return 0; 1259 1260 ex_alloc: 1261 kvfree(in); 1262 1263 ex_resize: 1264 if (udata) 1265 un_resize_user(cq); 1266 else 1267 un_resize_kernel(dev, cq); 1268 ex: 1269 mutex_unlock(&cq->resize_mutex); 1270 return err; 1271 } 1272 1273 int mlx5_ib_get_cqe_size(struct mlx5_ib_dev *dev, struct ib_cq *ibcq) 1274 { 1275 struct mlx5_ib_cq *cq; 1276 1277 if (!ibcq) 1278 return 128; 1279 1280 cq = to_mcq(ibcq); 1281 return cq->cqe_size; 1282 } 1283 1284 /* Called from atomic context */ 1285 int mlx5_ib_generate_wc(struct ib_cq *ibcq, struct ib_wc *wc) 1286 { 1287 struct mlx5_ib_wc *soft_wc; 1288 struct mlx5_ib_cq *cq = to_mcq(ibcq); 1289 unsigned long flags; 1290 1291 soft_wc = kmalloc(sizeof(*soft_wc), GFP_ATOMIC); 1292 if (!soft_wc) 1293 return -ENOMEM; 1294 1295 soft_wc->wc = *wc; 1296 spin_lock_irqsave(&cq->lock, flags); 1297 list_add_tail(&soft_wc->list, &cq->wc_list); 1298 if (cq->notify_flags == IB_CQ_NEXT_COMP || 1299 wc->status != IB_WC_SUCCESS) { 1300 cq->notify_flags = 0; 1301 schedule_work(&cq->notify_work); 1302 } 1303 spin_unlock_irqrestore(&cq->lock, flags); 1304 1305 return 0; 1306 } 1307