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 "srq.h" 39 #include "qp.h" 40 41 static void mlx5_ib_cq_comp(struct mlx5_core_cq *cq, struct mlx5_eqe *eqe) 42 { 43 struct ib_cq *ibcq = &to_mibcq(cq)->ibcq; 44 45 ibcq->comp_handler(ibcq, ibcq->cq_context); 46 } 47 48 static void mlx5_ib_cq_event(struct mlx5_core_cq *mcq, enum mlx5_event type) 49 { 50 struct mlx5_ib_cq *cq = container_of(mcq, struct mlx5_ib_cq, mcq); 51 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 52 struct ib_cq *ibcq = &cq->ibcq; 53 struct ib_event event; 54 55 if (type != MLX5_EVENT_TYPE_CQ_ERROR) { 56 mlx5_ib_warn(dev, "Unexpected event type %d on CQ %06x\n", 57 type, mcq->cqn); 58 return; 59 } 60 61 if (ibcq->event_handler) { 62 event.device = &dev->ib_dev; 63 event.event = IB_EVENT_CQ_ERR; 64 event.element.cq = ibcq; 65 ibcq->event_handler(&event, ibcq->cq_context); 66 } 67 } 68 69 static void *get_cqe(struct mlx5_ib_cq *cq, int n) 70 { 71 return mlx5_frag_buf_get_wqe(&cq->buf.fbc, n); 72 } 73 74 static u8 sw_ownership_bit(int n, int nent) 75 { 76 return (n & nent) ? 1 : 0; 77 } 78 79 static void *get_sw_cqe(struct mlx5_ib_cq *cq, int n) 80 { 81 void *cqe = get_cqe(cq, n & cq->ibcq.cqe); 82 struct mlx5_cqe64 *cqe64; 83 84 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; 85 86 if (likely(get_cqe_opcode(cqe64) != MLX5_CQE_INVALID) && 87 !((cqe64->op_own & MLX5_CQE_OWNER_MASK) ^ !!(n & (cq->ibcq.cqe + 1)))) { 88 return cqe; 89 } else { 90 return NULL; 91 } 92 } 93 94 static void *next_cqe_sw(struct mlx5_ib_cq *cq) 95 { 96 return get_sw_cqe(cq, cq->mcq.cons_index); 97 } 98 99 static enum ib_wc_opcode get_umr_comp(struct mlx5_ib_wq *wq, int idx) 100 { 101 switch (wq->wr_data[idx]) { 102 case MLX5_IB_WR_UMR: 103 return 0; 104 105 case IB_WR_LOCAL_INV: 106 return IB_WC_LOCAL_INV; 107 108 case IB_WR_REG_MR: 109 return IB_WC_REG_MR; 110 111 default: 112 pr_warn("unknown completion status\n"); 113 return 0; 114 } 115 } 116 117 static void handle_good_req(struct ib_wc *wc, struct mlx5_cqe64 *cqe, 118 struct mlx5_ib_wq *wq, int idx) 119 { 120 wc->wc_flags = 0; 121 switch (be32_to_cpu(cqe->sop_drop_qpn) >> 24) { 122 case MLX5_OPCODE_RDMA_WRITE_IMM: 123 wc->wc_flags |= IB_WC_WITH_IMM; 124 /* fall through */ 125 case MLX5_OPCODE_RDMA_WRITE: 126 wc->opcode = IB_WC_RDMA_WRITE; 127 break; 128 case MLX5_OPCODE_SEND_IMM: 129 wc->wc_flags |= IB_WC_WITH_IMM; 130 /* fall through */ 131 case MLX5_OPCODE_SEND: 132 case MLX5_OPCODE_SEND_INVAL: 133 wc->opcode = IB_WC_SEND; 134 break; 135 case MLX5_OPCODE_RDMA_READ: 136 wc->opcode = IB_WC_RDMA_READ; 137 wc->byte_len = be32_to_cpu(cqe->byte_cnt); 138 break; 139 case MLX5_OPCODE_ATOMIC_CS: 140 wc->opcode = IB_WC_COMP_SWAP; 141 wc->byte_len = 8; 142 break; 143 case MLX5_OPCODE_ATOMIC_FA: 144 wc->opcode = IB_WC_FETCH_ADD; 145 wc->byte_len = 8; 146 break; 147 case MLX5_OPCODE_ATOMIC_MASKED_CS: 148 wc->opcode = IB_WC_MASKED_COMP_SWAP; 149 wc->byte_len = 8; 150 break; 151 case MLX5_OPCODE_ATOMIC_MASKED_FA: 152 wc->opcode = IB_WC_MASKED_FETCH_ADD; 153 wc->byte_len = 8; 154 break; 155 case MLX5_OPCODE_UMR: 156 wc->opcode = get_umr_comp(wq, idx); 157 break; 158 } 159 } 160 161 enum { 162 MLX5_GRH_IN_BUFFER = 1, 163 MLX5_GRH_IN_CQE = 2, 164 }; 165 166 static void handle_responder(struct ib_wc *wc, struct mlx5_cqe64 *cqe, 167 struct mlx5_ib_qp *qp) 168 { 169 enum rdma_link_layer ll = rdma_port_get_link_layer(qp->ibqp.device, 1); 170 struct mlx5_ib_dev *dev = to_mdev(qp->ibqp.device); 171 struct mlx5_ib_srq *srq; 172 struct mlx5_ib_wq *wq; 173 u16 wqe_ctr; 174 u8 roce_packet_type; 175 bool vlan_present; 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_cmd_get_srq(dev, be32_to_cpu(cqe->srqn)); 183 srq = to_mibsrq(msrq); 184 } else { 185 srq = to_msrq(qp->ibqp.srq); 186 } 187 if (srq) { 188 wqe_ctr = be16_to_cpu(cqe->wqe_counter); 189 wc->wr_id = srq->wrid[wqe_ctr]; 190 mlx5_ib_free_srq_wqe(srq, wqe_ctr); 191 if (msrq) 192 mlx5_core_res_put(&msrq->common); 193 } 194 } else { 195 wq = &qp->rq; 196 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; 197 ++wq->tail; 198 } 199 wc->byte_len = be32_to_cpu(cqe->byte_cnt); 200 201 switch (get_cqe_opcode(cqe)) { 202 case MLX5_CQE_RESP_WR_IMM: 203 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM; 204 wc->wc_flags = IB_WC_WITH_IMM; 205 wc->ex.imm_data = cqe->immediate; 206 break; 207 case MLX5_CQE_RESP_SEND: 208 wc->opcode = IB_WC_RECV; 209 wc->wc_flags = IB_WC_IP_CSUM_OK; 210 if (unlikely(!((cqe->hds_ip_ext & CQE_L3_OK) && 211 (cqe->hds_ip_ext & CQE_L4_OK)))) 212 wc->wc_flags = 0; 213 break; 214 case MLX5_CQE_RESP_SEND_IMM: 215 wc->opcode = IB_WC_RECV; 216 wc->wc_flags = IB_WC_WITH_IMM; 217 wc->ex.imm_data = cqe->immediate; 218 break; 219 case MLX5_CQE_RESP_SEND_INV: 220 wc->opcode = IB_WC_RECV; 221 wc->wc_flags = IB_WC_WITH_INVALIDATE; 222 wc->ex.invalidate_rkey = be32_to_cpu(cqe->inval_rkey); 223 break; 224 } 225 wc->src_qp = be32_to_cpu(cqe->flags_rqpn) & 0xffffff; 226 wc->dlid_path_bits = cqe->ml_path; 227 g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3; 228 wc->wc_flags |= g ? IB_WC_GRH : 0; 229 if (unlikely(is_qp1(qp->ibqp.qp_type))) { 230 u16 pkey = be32_to_cpu(cqe->pkey) & 0xffff; 231 232 ib_find_cached_pkey(&dev->ib_dev, qp->port, pkey, 233 &wc->pkey_index); 234 } else { 235 wc->pkey_index = 0; 236 } 237 238 if (ll != IB_LINK_LAYER_ETHERNET) { 239 wc->slid = be16_to_cpu(cqe->slid); 240 wc->sl = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0xf; 241 return; 242 } 243 244 wc->slid = 0; 245 vlan_present = cqe->l4_l3_hdr_type & 0x1; 246 roce_packet_type = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0x3; 247 if (vlan_present) { 248 wc->vlan_id = (be16_to_cpu(cqe->vlan_info)) & 0xfff; 249 wc->sl = (be16_to_cpu(cqe->vlan_info) >> 13) & 0x7; 250 wc->wc_flags |= IB_WC_WITH_VLAN; 251 } else { 252 wc->sl = 0; 253 } 254 255 switch (roce_packet_type) { 256 case MLX5_CQE_ROCE_L3_HEADER_TYPE_GRH: 257 wc->network_hdr_type = RDMA_NETWORK_IB; 258 break; 259 case MLX5_CQE_ROCE_L3_HEADER_TYPE_IPV6: 260 wc->network_hdr_type = RDMA_NETWORK_IPV6; 261 break; 262 case MLX5_CQE_ROCE_L3_HEADER_TYPE_IPV4: 263 wc->network_hdr_type = RDMA_NETWORK_IPV4; 264 break; 265 } 266 wc->wc_flags |= IB_WC_WITH_NETWORK_HDR_TYPE; 267 } 268 269 static void dump_cqe(struct mlx5_ib_dev *dev, struct mlx5_err_cqe *cqe) 270 { 271 mlx5_ib_warn(dev, "dump error cqe\n"); 272 mlx5_dump_err_cqe(dev->mdev, cqe); 273 } 274 275 static void mlx5_handle_error_cqe(struct mlx5_ib_dev *dev, 276 struct mlx5_err_cqe *cqe, 277 struct ib_wc *wc) 278 { 279 int dump = 1; 280 281 switch (cqe->syndrome) { 282 case MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR: 283 wc->status = IB_WC_LOC_LEN_ERR; 284 break; 285 case MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR: 286 wc->status = IB_WC_LOC_QP_OP_ERR; 287 break; 288 case MLX5_CQE_SYNDROME_LOCAL_PROT_ERR: 289 wc->status = IB_WC_LOC_PROT_ERR; 290 break; 291 case MLX5_CQE_SYNDROME_WR_FLUSH_ERR: 292 dump = 0; 293 wc->status = IB_WC_WR_FLUSH_ERR; 294 break; 295 case MLX5_CQE_SYNDROME_MW_BIND_ERR: 296 wc->status = IB_WC_MW_BIND_ERR; 297 break; 298 case MLX5_CQE_SYNDROME_BAD_RESP_ERR: 299 wc->status = IB_WC_BAD_RESP_ERR; 300 break; 301 case MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR: 302 wc->status = IB_WC_LOC_ACCESS_ERR; 303 break; 304 case MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR: 305 wc->status = IB_WC_REM_INV_REQ_ERR; 306 break; 307 case MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR: 308 wc->status = IB_WC_REM_ACCESS_ERR; 309 break; 310 case MLX5_CQE_SYNDROME_REMOTE_OP_ERR: 311 wc->status = IB_WC_REM_OP_ERR; 312 break; 313 case MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR: 314 wc->status = IB_WC_RETRY_EXC_ERR; 315 dump = 0; 316 break; 317 case MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR: 318 wc->status = IB_WC_RNR_RETRY_EXC_ERR; 319 dump = 0; 320 break; 321 case MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR: 322 wc->status = IB_WC_REM_ABORT_ERR; 323 break; 324 default: 325 wc->status = IB_WC_GENERAL_ERR; 326 break; 327 } 328 329 wc->vendor_err = cqe->vendor_err_synd; 330 if (dump) 331 dump_cqe(dev, cqe); 332 } 333 334 static void handle_atomics(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64, 335 u16 tail, u16 head) 336 { 337 u16 idx; 338 339 do { 340 idx = tail & (qp->sq.wqe_cnt - 1); 341 if (idx == head) 342 break; 343 344 tail = qp->sq.w_list[idx].next; 345 } while (1); 346 tail = qp->sq.w_list[idx].next; 347 qp->sq.last_poll = tail; 348 } 349 350 static void free_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf) 351 { 352 mlx5_frag_buf_free(dev->mdev, &buf->frag_buf); 353 } 354 355 static void get_sig_err_item(struct mlx5_sig_err_cqe *cqe, 356 struct ib_sig_err *item) 357 { 358 u16 syndrome = be16_to_cpu(cqe->syndrome); 359 360 #define GUARD_ERR (1 << 13) 361 #define APPTAG_ERR (1 << 12) 362 #define REFTAG_ERR (1 << 11) 363 364 if (syndrome & GUARD_ERR) { 365 item->err_type = IB_SIG_BAD_GUARD; 366 item->expected = be32_to_cpu(cqe->expected_trans_sig) >> 16; 367 item->actual = be32_to_cpu(cqe->actual_trans_sig) >> 16; 368 } else 369 if (syndrome & REFTAG_ERR) { 370 item->err_type = IB_SIG_BAD_REFTAG; 371 item->expected = be32_to_cpu(cqe->expected_reftag); 372 item->actual = be32_to_cpu(cqe->actual_reftag); 373 } else 374 if (syndrome & APPTAG_ERR) { 375 item->err_type = IB_SIG_BAD_APPTAG; 376 item->expected = be32_to_cpu(cqe->expected_trans_sig) & 0xffff; 377 item->actual = be32_to_cpu(cqe->actual_trans_sig) & 0xffff; 378 } else { 379 pr_err("Got signature completion error with bad syndrome %04x\n", 380 syndrome); 381 } 382 383 item->sig_err_offset = be64_to_cpu(cqe->err_offset); 384 item->key = be32_to_cpu(cqe->mkey); 385 } 386 387 static void sw_comp(struct mlx5_ib_qp *qp, int num_entries, struct ib_wc *wc, 388 int *npolled, bool is_send) 389 { 390 struct mlx5_ib_wq *wq; 391 unsigned int cur; 392 int np; 393 int i; 394 395 wq = (is_send) ? &qp->sq : &qp->rq; 396 cur = wq->head - wq->tail; 397 np = *npolled; 398 399 if (cur == 0) 400 return; 401 402 for (i = 0; i < cur && np < num_entries; i++) { 403 unsigned int idx; 404 405 idx = (is_send) ? wq->last_poll : wq->tail; 406 idx &= (wq->wqe_cnt - 1); 407 wc->wr_id = wq->wrid[idx]; 408 wc->status = IB_WC_WR_FLUSH_ERR; 409 wc->vendor_err = MLX5_CQE_SYNDROME_WR_FLUSH_ERR; 410 wq->tail++; 411 if (is_send) 412 wq->last_poll = wq->w_list[idx].next; 413 np++; 414 wc->qp = &qp->ibqp; 415 wc++; 416 } 417 *npolled = np; 418 } 419 420 static void mlx5_ib_poll_sw_comp(struct mlx5_ib_cq *cq, int num_entries, 421 struct ib_wc *wc, int *npolled) 422 { 423 struct mlx5_ib_qp *qp; 424 425 *npolled = 0; 426 /* Find uncompleted WQEs belonging to that cq and return mmics ones */ 427 list_for_each_entry(qp, &cq->list_send_qp, cq_send_list) { 428 sw_comp(qp, num_entries, wc + *npolled, npolled, true); 429 if (*npolled >= num_entries) 430 return; 431 } 432 433 list_for_each_entry(qp, &cq->list_recv_qp, cq_recv_list) { 434 sw_comp(qp, num_entries, wc + *npolled, npolled, false); 435 if (*npolled >= num_entries) 436 return; 437 } 438 } 439 440 static int mlx5_poll_one(struct mlx5_ib_cq *cq, 441 struct mlx5_ib_qp **cur_qp, 442 struct ib_wc *wc) 443 { 444 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 445 struct mlx5_err_cqe *err_cqe; 446 struct mlx5_cqe64 *cqe64; 447 struct mlx5_core_qp *mqp; 448 struct mlx5_ib_wq *wq; 449 uint8_t opcode; 450 uint32_t qpn; 451 u16 wqe_ctr; 452 void *cqe; 453 int idx; 454 455 repoll: 456 cqe = next_cqe_sw(cq); 457 if (!cqe) 458 return -EAGAIN; 459 460 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; 461 462 ++cq->mcq.cons_index; 463 464 /* Make sure we read CQ entry contents after we've checked the 465 * ownership bit. 466 */ 467 rmb(); 468 469 opcode = get_cqe_opcode(cqe64); 470 if (unlikely(opcode == MLX5_CQE_RESIZE_CQ)) { 471 if (likely(cq->resize_buf)) { 472 free_cq_buf(dev, &cq->buf); 473 cq->buf = *cq->resize_buf; 474 kfree(cq->resize_buf); 475 cq->resize_buf = NULL; 476 goto repoll; 477 } else { 478 mlx5_ib_warn(dev, "unexpected resize cqe\n"); 479 } 480 } 481 482 qpn = ntohl(cqe64->sop_drop_qpn) & 0xffffff; 483 if (!*cur_qp || (qpn != (*cur_qp)->ibqp.qp_num)) { 484 /* We do not have to take the QP table lock here, 485 * because CQs will be locked while QPs are removed 486 * from the table. 487 */ 488 mqp = radix_tree_lookup(&dev->qp_table.tree, qpn); 489 *cur_qp = to_mibqp(mqp); 490 } 491 492 wc->qp = &(*cur_qp)->ibqp; 493 switch (opcode) { 494 case MLX5_CQE_REQ: 495 wq = &(*cur_qp)->sq; 496 wqe_ctr = be16_to_cpu(cqe64->wqe_counter); 497 idx = wqe_ctr & (wq->wqe_cnt - 1); 498 handle_good_req(wc, cqe64, wq, idx); 499 handle_atomics(*cur_qp, cqe64, wq->last_poll, idx); 500 wc->wr_id = wq->wrid[idx]; 501 wq->tail = wq->wqe_head[idx] + 1; 502 wc->status = IB_WC_SUCCESS; 503 break; 504 case MLX5_CQE_RESP_WR_IMM: 505 case MLX5_CQE_RESP_SEND: 506 case MLX5_CQE_RESP_SEND_IMM: 507 case MLX5_CQE_RESP_SEND_INV: 508 handle_responder(wc, cqe64, *cur_qp); 509 wc->status = IB_WC_SUCCESS; 510 break; 511 case MLX5_CQE_RESIZE_CQ: 512 break; 513 case MLX5_CQE_REQ_ERR: 514 case MLX5_CQE_RESP_ERR: 515 err_cqe = (struct mlx5_err_cqe *)cqe64; 516 mlx5_handle_error_cqe(dev, err_cqe, wc); 517 mlx5_ib_dbg(dev, "%s error cqe on cqn 0x%x:\n", 518 opcode == MLX5_CQE_REQ_ERR ? 519 "Requestor" : "Responder", cq->mcq.cqn); 520 mlx5_ib_dbg(dev, "syndrome 0x%x, vendor syndrome 0x%x\n", 521 err_cqe->syndrome, err_cqe->vendor_err_synd); 522 if (opcode == MLX5_CQE_REQ_ERR) { 523 wq = &(*cur_qp)->sq; 524 wqe_ctr = be16_to_cpu(cqe64->wqe_counter); 525 idx = wqe_ctr & (wq->wqe_cnt - 1); 526 wc->wr_id = wq->wrid[idx]; 527 wq->tail = wq->wqe_head[idx] + 1; 528 } else { 529 struct mlx5_ib_srq *srq; 530 531 if ((*cur_qp)->ibqp.srq) { 532 srq = to_msrq((*cur_qp)->ibqp.srq); 533 wqe_ctr = be16_to_cpu(cqe64->wqe_counter); 534 wc->wr_id = srq->wrid[wqe_ctr]; 535 mlx5_ib_free_srq_wqe(srq, wqe_ctr); 536 } else { 537 wq = &(*cur_qp)->rq; 538 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; 539 ++wq->tail; 540 } 541 } 542 break; 543 case MLX5_CQE_SIG_ERR: { 544 struct mlx5_sig_err_cqe *sig_err_cqe = 545 (struct mlx5_sig_err_cqe *)cqe64; 546 struct mlx5_core_sig_ctx *sig; 547 548 xa_lock(&dev->sig_mrs); 549 sig = xa_load(&dev->sig_mrs, 550 mlx5_base_mkey(be32_to_cpu(sig_err_cqe->mkey))); 551 get_sig_err_item(sig_err_cqe, &sig->err_item); 552 sig->sig_err_exists = true; 553 sig->sigerr_count++; 554 555 mlx5_ib_warn(dev, "CQN: 0x%x Got SIGERR on key: 0x%x err_type %x err_offset %llx expected %x actual %x\n", 556 cq->mcq.cqn, sig->err_item.key, 557 sig->err_item.err_type, 558 sig->err_item.sig_err_offset, 559 sig->err_item.expected, 560 sig->err_item.actual); 561 562 xa_unlock(&dev->sig_mrs); 563 goto repoll; 564 } 565 } 566 567 return 0; 568 } 569 570 static int poll_soft_wc(struct mlx5_ib_cq *cq, int num_entries, 571 struct ib_wc *wc, bool is_fatal_err) 572 { 573 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 574 struct mlx5_ib_wc *soft_wc, *next; 575 int npolled = 0; 576 577 list_for_each_entry_safe(soft_wc, next, &cq->wc_list, list) { 578 if (npolled >= num_entries) 579 break; 580 581 mlx5_ib_dbg(dev, "polled software generated completion on CQ 0x%x\n", 582 cq->mcq.cqn); 583 584 if (unlikely(is_fatal_err)) { 585 soft_wc->wc.status = IB_WC_WR_FLUSH_ERR; 586 soft_wc->wc.vendor_err = MLX5_CQE_SYNDROME_WR_FLUSH_ERR; 587 } 588 wc[npolled++] = soft_wc->wc; 589 list_del(&soft_wc->list); 590 kfree(soft_wc); 591 } 592 593 return npolled; 594 } 595 596 int mlx5_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) 597 { 598 struct mlx5_ib_cq *cq = to_mcq(ibcq); 599 struct mlx5_ib_qp *cur_qp = NULL; 600 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 601 struct mlx5_core_dev *mdev = dev->mdev; 602 unsigned long flags; 603 int soft_polled = 0; 604 int npolled; 605 606 spin_lock_irqsave(&cq->lock, flags); 607 if (mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) { 608 /* make sure no soft wqe's are waiting */ 609 if (unlikely(!list_empty(&cq->wc_list))) 610 soft_polled = poll_soft_wc(cq, num_entries, wc, true); 611 612 mlx5_ib_poll_sw_comp(cq, num_entries - soft_polled, 613 wc + soft_polled, &npolled); 614 goto out; 615 } 616 617 if (unlikely(!list_empty(&cq->wc_list))) 618 soft_polled = poll_soft_wc(cq, num_entries, wc, false); 619 620 for (npolled = 0; npolled < num_entries - soft_polled; npolled++) { 621 if (mlx5_poll_one(cq, &cur_qp, wc + soft_polled + npolled)) 622 break; 623 } 624 625 if (npolled) 626 mlx5_cq_set_ci(&cq->mcq); 627 out: 628 spin_unlock_irqrestore(&cq->lock, flags); 629 630 return soft_polled + npolled; 631 } 632 633 int mlx5_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) 634 { 635 struct mlx5_core_dev *mdev = to_mdev(ibcq->device)->mdev; 636 struct mlx5_ib_cq *cq = to_mcq(ibcq); 637 void __iomem *uar_page = mdev->priv.uar->map; 638 unsigned long irq_flags; 639 int ret = 0; 640 641 spin_lock_irqsave(&cq->lock, irq_flags); 642 if (cq->notify_flags != IB_CQ_NEXT_COMP) 643 cq->notify_flags = flags & IB_CQ_SOLICITED_MASK; 644 645 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !list_empty(&cq->wc_list)) 646 ret = 1; 647 spin_unlock_irqrestore(&cq->lock, irq_flags); 648 649 mlx5_cq_arm(&cq->mcq, 650 (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ? 651 MLX5_CQ_DB_REQ_NOT_SOL : MLX5_CQ_DB_REQ_NOT, 652 uar_page, to_mcq(ibcq)->mcq.cons_index); 653 654 return ret; 655 } 656 657 static int alloc_cq_frag_buf(struct mlx5_ib_dev *dev, 658 struct mlx5_ib_cq_buf *buf, 659 int nent, 660 int cqe_size) 661 { 662 struct mlx5_frag_buf *frag_buf = &buf->frag_buf; 663 u8 log_wq_stride = 6 + (cqe_size == 128 ? 1 : 0); 664 u8 log_wq_sz = ilog2(cqe_size); 665 int err; 666 667 err = mlx5_frag_buf_alloc_node(dev->mdev, 668 nent * cqe_size, 669 frag_buf, 670 dev->mdev->priv.numa_node); 671 if (err) 672 return err; 673 674 mlx5_init_fbc(frag_buf->frags, log_wq_stride, log_wq_sz, &buf->fbc); 675 676 buf->cqe_size = cqe_size; 677 buf->nent = nent; 678 679 return 0; 680 } 681 682 enum { 683 MLX5_CQE_RES_FORMAT_HASH = 0, 684 MLX5_CQE_RES_FORMAT_CSUM = 1, 685 MLX5_CQE_RES_FORMAT_CSUM_STRIDX = 3, 686 }; 687 688 static int mini_cqe_res_format_to_hw(struct mlx5_ib_dev *dev, u8 format) 689 { 690 switch (format) { 691 case MLX5_IB_CQE_RES_FORMAT_HASH: 692 return MLX5_CQE_RES_FORMAT_HASH; 693 case MLX5_IB_CQE_RES_FORMAT_CSUM: 694 return MLX5_CQE_RES_FORMAT_CSUM; 695 case MLX5_IB_CQE_RES_FORMAT_CSUM_STRIDX: 696 if (MLX5_CAP_GEN(dev->mdev, mini_cqe_resp_stride_index)) 697 return MLX5_CQE_RES_FORMAT_CSUM_STRIDX; 698 return -EOPNOTSUPP; 699 default: 700 return -EINVAL; 701 } 702 } 703 704 static int create_cq_user(struct mlx5_ib_dev *dev, struct ib_udata *udata, 705 struct mlx5_ib_cq *cq, int entries, u32 **cqb, 706 int *cqe_size, int *index, int *inlen) 707 { 708 struct mlx5_ib_create_cq ucmd = {}; 709 size_t ucmdlen; 710 int page_shift; 711 __be64 *pas; 712 int npages; 713 int ncont; 714 void *cqc; 715 int err; 716 struct mlx5_ib_ucontext *context = rdma_udata_to_drv_context( 717 udata, struct mlx5_ib_ucontext, ibucontext); 718 719 ucmdlen = min(udata->inlen, sizeof(ucmd)); 720 if (ucmdlen < offsetof(struct mlx5_ib_create_cq, flags)) 721 return -EINVAL; 722 723 if (ib_copy_from_udata(&ucmd, udata, ucmdlen)) 724 return -EFAULT; 725 726 if ((ucmd.flags & ~(MLX5_IB_CREATE_CQ_FLAGS_CQE_128B_PAD | 727 MLX5_IB_CREATE_CQ_FLAGS_UAR_PAGE_INDEX))) 728 return -EINVAL; 729 730 if ((ucmd.cqe_size != 64 && ucmd.cqe_size != 128) || 731 ucmd.reserved0 || ucmd.reserved1) 732 return -EINVAL; 733 734 *cqe_size = ucmd.cqe_size; 735 736 cq->buf.umem = 737 ib_umem_get(&dev->ib_dev, ucmd.buf_addr, 738 entries * ucmd.cqe_size, IB_ACCESS_LOCAL_WRITE); 739 if (IS_ERR(cq->buf.umem)) { 740 err = PTR_ERR(cq->buf.umem); 741 return err; 742 } 743 744 err = mlx5_ib_db_map_user(context, udata, ucmd.db_addr, &cq->db); 745 if (err) 746 goto err_umem; 747 748 mlx5_ib_cont_pages(cq->buf.umem, ucmd.buf_addr, 0, &npages, &page_shift, 749 &ncont, NULL); 750 mlx5_ib_dbg(dev, "addr 0x%llx, size %u, npages %d, page_shift %d, ncont %d\n", 751 ucmd.buf_addr, entries * ucmd.cqe_size, npages, page_shift, ncont); 752 753 *inlen = MLX5_ST_SZ_BYTES(create_cq_in) + 754 MLX5_FLD_SZ_BYTES(create_cq_in, pas[0]) * ncont; 755 *cqb = kvzalloc(*inlen, GFP_KERNEL); 756 if (!*cqb) { 757 err = -ENOMEM; 758 goto err_db; 759 } 760 761 pas = (__be64 *)MLX5_ADDR_OF(create_cq_in, *cqb, pas); 762 mlx5_ib_populate_pas(dev, cq->buf.umem, page_shift, pas, 0); 763 764 cqc = MLX5_ADDR_OF(create_cq_in, *cqb, cq_context); 765 MLX5_SET(cqc, cqc, log_page_size, 766 page_shift - MLX5_ADAPTER_PAGE_SHIFT); 767 768 if (ucmd.flags & MLX5_IB_CREATE_CQ_FLAGS_UAR_PAGE_INDEX) { 769 *index = ucmd.uar_page_index; 770 } else if (context->bfregi.lib_uar_dyn) { 771 err = -EINVAL; 772 goto err_cqb; 773 } else { 774 *index = context->bfregi.sys_pages[0]; 775 } 776 777 if (ucmd.cqe_comp_en == 1) { 778 int mini_cqe_format; 779 780 if (!((*cqe_size == 128 && 781 MLX5_CAP_GEN(dev->mdev, cqe_compression_128)) || 782 (*cqe_size == 64 && 783 MLX5_CAP_GEN(dev->mdev, cqe_compression)))) { 784 err = -EOPNOTSUPP; 785 mlx5_ib_warn(dev, "CQE compression is not supported for size %d!\n", 786 *cqe_size); 787 goto err_cqb; 788 } 789 790 mini_cqe_format = 791 mini_cqe_res_format_to_hw(dev, 792 ucmd.cqe_comp_res_format); 793 if (mini_cqe_format < 0) { 794 err = mini_cqe_format; 795 mlx5_ib_dbg(dev, "CQE compression res format %d error: %d\n", 796 ucmd.cqe_comp_res_format, err); 797 goto err_cqb; 798 } 799 800 MLX5_SET(cqc, cqc, cqe_comp_en, 1); 801 MLX5_SET(cqc, cqc, mini_cqe_res_format, mini_cqe_format); 802 } 803 804 if (ucmd.flags & MLX5_IB_CREATE_CQ_FLAGS_CQE_128B_PAD) { 805 if (*cqe_size != 128 || 806 !MLX5_CAP_GEN(dev->mdev, cqe_128_always)) { 807 err = -EOPNOTSUPP; 808 mlx5_ib_warn(dev, 809 "CQE padding is not supported for CQE size of %dB!\n", 810 *cqe_size); 811 goto err_cqb; 812 } 813 814 cq->private_flags |= MLX5_IB_CQ_PR_FLAGS_CQE_128_PAD; 815 } 816 817 MLX5_SET(create_cq_in, *cqb, uid, context->devx_uid); 818 return 0; 819 820 err_cqb: 821 kvfree(*cqb); 822 823 err_db: 824 mlx5_ib_db_unmap_user(context, &cq->db); 825 826 err_umem: 827 ib_umem_release(cq->buf.umem); 828 return err; 829 } 830 831 static void destroy_cq_user(struct mlx5_ib_cq *cq, struct ib_udata *udata) 832 { 833 struct mlx5_ib_ucontext *context = rdma_udata_to_drv_context( 834 udata, struct mlx5_ib_ucontext, ibucontext); 835 836 mlx5_ib_db_unmap_user(context, &cq->db); 837 ib_umem_release(cq->buf.umem); 838 } 839 840 static void init_cq_frag_buf(struct mlx5_ib_cq *cq, 841 struct mlx5_ib_cq_buf *buf) 842 { 843 int i; 844 void *cqe; 845 struct mlx5_cqe64 *cqe64; 846 847 for (i = 0; i < buf->nent; i++) { 848 cqe = get_cqe(cq, i); 849 cqe64 = buf->cqe_size == 64 ? cqe : cqe + 64; 850 cqe64->op_own = MLX5_CQE_INVALID << 4; 851 } 852 } 853 854 static int create_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, 855 int entries, int cqe_size, 856 u32 **cqb, int *index, int *inlen) 857 { 858 __be64 *pas; 859 void *cqc; 860 int err; 861 862 err = mlx5_db_alloc(dev->mdev, &cq->db); 863 if (err) 864 return err; 865 866 cq->mcq.set_ci_db = cq->db.db; 867 cq->mcq.arm_db = cq->db.db + 1; 868 cq->mcq.cqe_sz = cqe_size; 869 870 err = alloc_cq_frag_buf(dev, &cq->buf, entries, cqe_size); 871 if (err) 872 goto err_db; 873 874 init_cq_frag_buf(cq, &cq->buf); 875 876 *inlen = MLX5_ST_SZ_BYTES(create_cq_in) + 877 MLX5_FLD_SZ_BYTES(create_cq_in, pas[0]) * 878 cq->buf.frag_buf.npages; 879 *cqb = kvzalloc(*inlen, GFP_KERNEL); 880 if (!*cqb) { 881 err = -ENOMEM; 882 goto err_buf; 883 } 884 885 pas = (__be64 *)MLX5_ADDR_OF(create_cq_in, *cqb, pas); 886 mlx5_fill_page_frag_array(&cq->buf.frag_buf, pas); 887 888 cqc = MLX5_ADDR_OF(create_cq_in, *cqb, cq_context); 889 MLX5_SET(cqc, cqc, log_page_size, 890 cq->buf.frag_buf.page_shift - 891 MLX5_ADAPTER_PAGE_SHIFT); 892 893 *index = dev->mdev->priv.uar->index; 894 895 return 0; 896 897 err_buf: 898 free_cq_buf(dev, &cq->buf); 899 900 err_db: 901 mlx5_db_free(dev->mdev, &cq->db); 902 return err; 903 } 904 905 static void destroy_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq) 906 { 907 free_cq_buf(dev, &cq->buf); 908 mlx5_db_free(dev->mdev, &cq->db); 909 } 910 911 static void notify_soft_wc_handler(struct work_struct *work) 912 { 913 struct mlx5_ib_cq *cq = container_of(work, struct mlx5_ib_cq, 914 notify_work); 915 916 cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context); 917 } 918 919 int mlx5_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, 920 struct ib_udata *udata) 921 { 922 struct ib_device *ibdev = ibcq->device; 923 int entries = attr->cqe; 924 int vector = attr->comp_vector; 925 struct mlx5_ib_dev *dev = to_mdev(ibdev); 926 struct mlx5_ib_cq *cq = to_mcq(ibcq); 927 u32 out[MLX5_ST_SZ_DW(create_cq_out)]; 928 int index; 929 int inlen; 930 u32 *cqb = NULL; 931 void *cqc; 932 int cqe_size; 933 unsigned int irqn; 934 int eqn; 935 int err; 936 937 if (entries < 0 || 938 (entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz)))) 939 return -EINVAL; 940 941 if (check_cq_create_flags(attr->flags)) 942 return -EOPNOTSUPP; 943 944 entries = roundup_pow_of_two(entries + 1); 945 if (entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz))) 946 return -EINVAL; 947 948 cq->ibcq.cqe = entries - 1; 949 mutex_init(&cq->resize_mutex); 950 spin_lock_init(&cq->lock); 951 cq->resize_buf = NULL; 952 cq->resize_umem = NULL; 953 cq->create_flags = attr->flags; 954 INIT_LIST_HEAD(&cq->list_send_qp); 955 INIT_LIST_HEAD(&cq->list_recv_qp); 956 957 if (udata) { 958 err = create_cq_user(dev, udata, cq, entries, &cqb, &cqe_size, 959 &index, &inlen); 960 if (err) 961 return err; 962 } else { 963 cqe_size = cache_line_size() == 128 ? 128 : 64; 964 err = create_cq_kernel(dev, cq, entries, cqe_size, &cqb, 965 &index, &inlen); 966 if (err) 967 return err; 968 969 INIT_WORK(&cq->notify_work, notify_soft_wc_handler); 970 } 971 972 err = mlx5_vector2eqn(dev->mdev, vector, &eqn, &irqn); 973 if (err) 974 goto err_cqb; 975 976 cq->cqe_size = cqe_size; 977 978 cqc = MLX5_ADDR_OF(create_cq_in, cqb, cq_context); 979 MLX5_SET(cqc, cqc, cqe_sz, 980 cqe_sz_to_mlx_sz(cqe_size, 981 cq->private_flags & 982 MLX5_IB_CQ_PR_FLAGS_CQE_128_PAD)); 983 MLX5_SET(cqc, cqc, log_cq_size, ilog2(entries)); 984 MLX5_SET(cqc, cqc, uar_page, index); 985 MLX5_SET(cqc, cqc, c_eqn, eqn); 986 MLX5_SET64(cqc, cqc, dbr_addr, cq->db.dma); 987 if (cq->create_flags & IB_UVERBS_CQ_FLAGS_IGNORE_OVERRUN) 988 MLX5_SET(cqc, cqc, oi, 1); 989 990 err = mlx5_core_create_cq(dev->mdev, &cq->mcq, cqb, inlen, out, sizeof(out)); 991 if (err) 992 goto err_cqb; 993 994 mlx5_ib_dbg(dev, "cqn 0x%x\n", cq->mcq.cqn); 995 cq->mcq.irqn = irqn; 996 if (udata) 997 cq->mcq.tasklet_ctx.comp = mlx5_ib_cq_comp; 998 else 999 cq->mcq.comp = mlx5_ib_cq_comp; 1000 cq->mcq.event = mlx5_ib_cq_event; 1001 1002 INIT_LIST_HEAD(&cq->wc_list); 1003 1004 if (udata) 1005 if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof(__u32))) { 1006 err = -EFAULT; 1007 goto err_cmd; 1008 } 1009 1010 1011 kvfree(cqb); 1012 return 0; 1013 1014 err_cmd: 1015 mlx5_core_destroy_cq(dev->mdev, &cq->mcq); 1016 1017 err_cqb: 1018 kvfree(cqb); 1019 if (udata) 1020 destroy_cq_user(cq, udata); 1021 else 1022 destroy_cq_kernel(dev, cq); 1023 return err; 1024 } 1025 1026 void mlx5_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata) 1027 { 1028 struct mlx5_ib_dev *dev = to_mdev(cq->device); 1029 struct mlx5_ib_cq *mcq = to_mcq(cq); 1030 1031 mlx5_core_destroy_cq(dev->mdev, &mcq->mcq); 1032 if (udata) 1033 destroy_cq_user(mcq, udata); 1034 else 1035 destroy_cq_kernel(dev, mcq); 1036 } 1037 1038 static int is_equal_rsn(struct mlx5_cqe64 *cqe64, u32 rsn) 1039 { 1040 return rsn == (ntohl(cqe64->sop_drop_qpn) & 0xffffff); 1041 } 1042 1043 void __mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 rsn, struct mlx5_ib_srq *srq) 1044 { 1045 struct mlx5_cqe64 *cqe64, *dest64; 1046 void *cqe, *dest; 1047 u32 prod_index; 1048 int nfreed = 0; 1049 u8 owner_bit; 1050 1051 if (!cq) 1052 return; 1053 1054 /* First we need to find the current producer index, so we 1055 * know where to start cleaning from. It doesn't matter if HW 1056 * adds new entries after this loop -- the QP we're worried 1057 * about is already in RESET, so the new entries won't come 1058 * from our QP and therefore don't need to be checked. 1059 */ 1060 for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); prod_index++) 1061 if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe) 1062 break; 1063 1064 /* Now sweep backwards through the CQ, removing CQ entries 1065 * that match our QP by copying older entries on top of them. 1066 */ 1067 while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) { 1068 cqe = get_cqe(cq, prod_index & cq->ibcq.cqe); 1069 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; 1070 if (is_equal_rsn(cqe64, rsn)) { 1071 if (srq && (ntohl(cqe64->srqn) & 0xffffff)) 1072 mlx5_ib_free_srq_wqe(srq, be16_to_cpu(cqe64->wqe_counter)); 1073 ++nfreed; 1074 } else if (nfreed) { 1075 dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe); 1076 dest64 = (cq->mcq.cqe_sz == 64) ? dest : dest + 64; 1077 owner_bit = dest64->op_own & MLX5_CQE_OWNER_MASK; 1078 memcpy(dest, cqe, cq->mcq.cqe_sz); 1079 dest64->op_own = owner_bit | 1080 (dest64->op_own & ~MLX5_CQE_OWNER_MASK); 1081 } 1082 } 1083 1084 if (nfreed) { 1085 cq->mcq.cons_index += nfreed; 1086 /* Make sure update of buffer contents is done before 1087 * updating consumer index. 1088 */ 1089 wmb(); 1090 mlx5_cq_set_ci(&cq->mcq); 1091 } 1092 } 1093 1094 void mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 qpn, struct mlx5_ib_srq *srq) 1095 { 1096 if (!cq) 1097 return; 1098 1099 spin_lock_irq(&cq->lock); 1100 __mlx5_ib_cq_clean(cq, qpn, srq); 1101 spin_unlock_irq(&cq->lock); 1102 } 1103 1104 int mlx5_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) 1105 { 1106 struct mlx5_ib_dev *dev = to_mdev(cq->device); 1107 struct mlx5_ib_cq *mcq = to_mcq(cq); 1108 int err; 1109 1110 if (!MLX5_CAP_GEN(dev->mdev, cq_moderation)) 1111 return -EOPNOTSUPP; 1112 1113 if (cq_period > MLX5_MAX_CQ_PERIOD) 1114 return -EINVAL; 1115 1116 err = mlx5_core_modify_cq_moderation(dev->mdev, &mcq->mcq, 1117 cq_period, cq_count); 1118 if (err) 1119 mlx5_ib_warn(dev, "modify cq 0x%x failed\n", mcq->mcq.cqn); 1120 1121 return err; 1122 } 1123 1124 static int resize_user(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, 1125 int entries, struct ib_udata *udata, int *npas, 1126 int *page_shift, int *cqe_size) 1127 { 1128 struct mlx5_ib_resize_cq ucmd; 1129 struct ib_umem *umem; 1130 int err; 1131 int npages; 1132 1133 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)); 1134 if (err) 1135 return err; 1136 1137 if (ucmd.reserved0 || ucmd.reserved1) 1138 return -EINVAL; 1139 1140 /* check multiplication overflow */ 1141 if (ucmd.cqe_size && SIZE_MAX / ucmd.cqe_size <= entries - 1) 1142 return -EINVAL; 1143 1144 umem = ib_umem_get(&dev->ib_dev, ucmd.buf_addr, 1145 (size_t)ucmd.cqe_size * entries, 1146 IB_ACCESS_LOCAL_WRITE); 1147 if (IS_ERR(umem)) { 1148 err = PTR_ERR(umem); 1149 return err; 1150 } 1151 1152 mlx5_ib_cont_pages(umem, ucmd.buf_addr, 0, &npages, page_shift, 1153 npas, NULL); 1154 1155 cq->resize_umem = umem; 1156 *cqe_size = ucmd.cqe_size; 1157 1158 return 0; 1159 } 1160 1161 static int resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, 1162 int entries, int cqe_size) 1163 { 1164 int err; 1165 1166 cq->resize_buf = kzalloc(sizeof(*cq->resize_buf), GFP_KERNEL); 1167 if (!cq->resize_buf) 1168 return -ENOMEM; 1169 1170 err = alloc_cq_frag_buf(dev, cq->resize_buf, entries, cqe_size); 1171 if (err) 1172 goto ex; 1173 1174 init_cq_frag_buf(cq, cq->resize_buf); 1175 1176 return 0; 1177 1178 ex: 1179 kfree(cq->resize_buf); 1180 return err; 1181 } 1182 1183 static int copy_resize_cqes(struct mlx5_ib_cq *cq) 1184 { 1185 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); 1186 struct mlx5_cqe64 *scqe64; 1187 struct mlx5_cqe64 *dcqe64; 1188 void *start_cqe; 1189 void *scqe; 1190 void *dcqe; 1191 int ssize; 1192 int dsize; 1193 int i; 1194 u8 sw_own; 1195 1196 ssize = cq->buf.cqe_size; 1197 dsize = cq->resize_buf->cqe_size; 1198 if (ssize != dsize) { 1199 mlx5_ib_warn(dev, "resize from different cqe size is not supported\n"); 1200 return -EINVAL; 1201 } 1202 1203 i = cq->mcq.cons_index; 1204 scqe = get_sw_cqe(cq, i); 1205 scqe64 = ssize == 64 ? scqe : scqe + 64; 1206 start_cqe = scqe; 1207 if (!scqe) { 1208 mlx5_ib_warn(dev, "expected cqe in sw ownership\n"); 1209 return -EINVAL; 1210 } 1211 1212 while (get_cqe_opcode(scqe64) != MLX5_CQE_RESIZE_CQ) { 1213 dcqe = mlx5_frag_buf_get_wqe(&cq->resize_buf->fbc, 1214 (i + 1) & cq->resize_buf->nent); 1215 dcqe64 = dsize == 64 ? dcqe : dcqe + 64; 1216 sw_own = sw_ownership_bit(i + 1, cq->resize_buf->nent); 1217 memcpy(dcqe, scqe, dsize); 1218 dcqe64->op_own = (dcqe64->op_own & ~MLX5_CQE_OWNER_MASK) | sw_own; 1219 1220 ++i; 1221 scqe = get_sw_cqe(cq, i); 1222 scqe64 = ssize == 64 ? scqe : scqe + 64; 1223 if (!scqe) { 1224 mlx5_ib_warn(dev, "expected cqe in sw ownership\n"); 1225 return -EINVAL; 1226 } 1227 1228 if (scqe == start_cqe) { 1229 pr_warn("resize CQ failed to get resize CQE, CQN 0x%x\n", 1230 cq->mcq.cqn); 1231 return -ENOMEM; 1232 } 1233 } 1234 ++cq->mcq.cons_index; 1235 return 0; 1236 } 1237 1238 int mlx5_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) 1239 { 1240 struct mlx5_ib_dev *dev = to_mdev(ibcq->device); 1241 struct mlx5_ib_cq *cq = to_mcq(ibcq); 1242 void *cqc; 1243 u32 *in; 1244 int err; 1245 int npas; 1246 __be64 *pas; 1247 int page_shift; 1248 int inlen; 1249 int cqe_size; 1250 unsigned long flags; 1251 1252 if (!MLX5_CAP_GEN(dev->mdev, cq_resize)) { 1253 pr_info("Firmware does not support resize CQ\n"); 1254 return -ENOSYS; 1255 } 1256 1257 if (entries < 1 || 1258 entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz))) { 1259 mlx5_ib_warn(dev, "wrong entries number %d, max %d\n", 1260 entries, 1261 1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz)); 1262 return -EINVAL; 1263 } 1264 1265 entries = roundup_pow_of_two(entries + 1); 1266 if (entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz)) + 1) 1267 return -EINVAL; 1268 1269 if (entries == ibcq->cqe + 1) 1270 return 0; 1271 1272 mutex_lock(&cq->resize_mutex); 1273 if (udata) { 1274 err = resize_user(dev, cq, entries, udata, &npas, &page_shift, 1275 &cqe_size); 1276 } else { 1277 cqe_size = 64; 1278 err = resize_kernel(dev, cq, entries, cqe_size); 1279 if (!err) { 1280 struct mlx5_frag_buf *frag_buf = &cq->resize_buf->frag_buf; 1281 1282 npas = frag_buf->npages; 1283 page_shift = frag_buf->page_shift; 1284 } 1285 } 1286 1287 if (err) 1288 goto ex; 1289 1290 inlen = MLX5_ST_SZ_BYTES(modify_cq_in) + 1291 MLX5_FLD_SZ_BYTES(modify_cq_in, pas[0]) * npas; 1292 1293 in = kvzalloc(inlen, GFP_KERNEL); 1294 if (!in) { 1295 err = -ENOMEM; 1296 goto ex_resize; 1297 } 1298 1299 pas = (__be64 *)MLX5_ADDR_OF(modify_cq_in, in, pas); 1300 if (udata) 1301 mlx5_ib_populate_pas(dev, cq->resize_umem, page_shift, 1302 pas, 0); 1303 else 1304 mlx5_fill_page_frag_array(&cq->resize_buf->frag_buf, pas); 1305 1306 MLX5_SET(modify_cq_in, in, 1307 modify_field_select_resize_field_select.resize_field_select.resize_field_select, 1308 MLX5_MODIFY_CQ_MASK_LOG_SIZE | 1309 MLX5_MODIFY_CQ_MASK_PG_OFFSET | 1310 MLX5_MODIFY_CQ_MASK_PG_SIZE); 1311 1312 cqc = MLX5_ADDR_OF(modify_cq_in, in, cq_context); 1313 1314 MLX5_SET(cqc, cqc, log_page_size, 1315 page_shift - MLX5_ADAPTER_PAGE_SHIFT); 1316 MLX5_SET(cqc, cqc, cqe_sz, 1317 cqe_sz_to_mlx_sz(cqe_size, 1318 cq->private_flags & 1319 MLX5_IB_CQ_PR_FLAGS_CQE_128_PAD)); 1320 MLX5_SET(cqc, cqc, log_cq_size, ilog2(entries)); 1321 1322 MLX5_SET(modify_cq_in, in, op_mod, MLX5_CQ_OPMOD_RESIZE); 1323 MLX5_SET(modify_cq_in, in, cqn, cq->mcq.cqn); 1324 1325 err = mlx5_core_modify_cq(dev->mdev, &cq->mcq, in, inlen); 1326 if (err) 1327 goto ex_alloc; 1328 1329 if (udata) { 1330 cq->ibcq.cqe = entries - 1; 1331 ib_umem_release(cq->buf.umem); 1332 cq->buf.umem = cq->resize_umem; 1333 cq->resize_umem = NULL; 1334 } else { 1335 struct mlx5_ib_cq_buf tbuf; 1336 int resized = 0; 1337 1338 spin_lock_irqsave(&cq->lock, flags); 1339 if (cq->resize_buf) { 1340 err = copy_resize_cqes(cq); 1341 if (!err) { 1342 tbuf = cq->buf; 1343 cq->buf = *cq->resize_buf; 1344 kfree(cq->resize_buf); 1345 cq->resize_buf = NULL; 1346 resized = 1; 1347 } 1348 } 1349 cq->ibcq.cqe = entries - 1; 1350 spin_unlock_irqrestore(&cq->lock, flags); 1351 if (resized) 1352 free_cq_buf(dev, &tbuf); 1353 } 1354 mutex_unlock(&cq->resize_mutex); 1355 1356 kvfree(in); 1357 return 0; 1358 1359 ex_alloc: 1360 kvfree(in); 1361 1362 ex_resize: 1363 ib_umem_release(cq->resize_umem); 1364 if (!udata) { 1365 free_cq_buf(dev, cq->resize_buf); 1366 cq->resize_buf = NULL; 1367 } 1368 ex: 1369 mutex_unlock(&cq->resize_mutex); 1370 return err; 1371 } 1372 1373 int mlx5_ib_get_cqe_size(struct ib_cq *ibcq) 1374 { 1375 struct mlx5_ib_cq *cq; 1376 1377 if (!ibcq) 1378 return 128; 1379 1380 cq = to_mcq(ibcq); 1381 return cq->cqe_size; 1382 } 1383 1384 /* Called from atomic context */ 1385 int mlx5_ib_generate_wc(struct ib_cq *ibcq, struct ib_wc *wc) 1386 { 1387 struct mlx5_ib_wc *soft_wc; 1388 struct mlx5_ib_cq *cq = to_mcq(ibcq); 1389 unsigned long flags; 1390 1391 soft_wc = kmalloc(sizeof(*soft_wc), GFP_ATOMIC); 1392 if (!soft_wc) 1393 return -ENOMEM; 1394 1395 soft_wc->wc = *wc; 1396 spin_lock_irqsave(&cq->lock, flags); 1397 list_add_tail(&soft_wc->list, &cq->wc_list); 1398 if (cq->notify_flags == IB_CQ_NEXT_COMP || 1399 wc->status != IB_WC_SUCCESS) { 1400 cq->notify_flags = 0; 1401 schedule_work(&cq->notify_work); 1402 } 1403 spin_unlock_irqrestore(&cq->lock, flags); 1404 1405 return 0; 1406 } 1407