Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013, Mellanox Technologies inc. 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 "mlx5_ib.h" |
| 36 | #include "user.h" |
| 37 | |
| 38 | static void mlx5_ib_cq_comp(struct mlx5_core_cq *cq) |
| 39 | { |
| 40 | struct ib_cq *ibcq = &to_mibcq(cq)->ibcq; |
| 41 | |
| 42 | ibcq->comp_handler(ibcq, ibcq->cq_context); |
| 43 | } |
| 44 | |
| 45 | static void mlx5_ib_cq_event(struct mlx5_core_cq *mcq, enum mlx5_event type) |
| 46 | { |
| 47 | struct mlx5_ib_cq *cq = container_of(mcq, struct mlx5_ib_cq, mcq); |
| 48 | struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); |
| 49 | struct ib_cq *ibcq = &cq->ibcq; |
| 50 | struct ib_event event; |
| 51 | |
| 52 | if (type != MLX5_EVENT_TYPE_CQ_ERROR) { |
| 53 | mlx5_ib_warn(dev, "Unexpected event type %d on CQ %06x\n", |
| 54 | type, mcq->cqn); |
| 55 | return; |
| 56 | } |
| 57 | |
| 58 | if (ibcq->event_handler) { |
| 59 | event.device = &dev->ib_dev; |
| 60 | event.event = IB_EVENT_CQ_ERR; |
| 61 | event.element.cq = ibcq; |
| 62 | ibcq->event_handler(&event, ibcq->cq_context); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | static void *get_cqe_from_buf(struct mlx5_ib_cq_buf *buf, int n, int size) |
| 67 | { |
| 68 | return mlx5_buf_offset(&buf->buf, n * size); |
| 69 | } |
| 70 | |
| 71 | static void *get_cqe(struct mlx5_ib_cq *cq, int n) |
| 72 | { |
| 73 | return get_cqe_from_buf(&cq->buf, n, cq->mcq.cqe_sz); |
| 74 | } |
| 75 | |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 76 | static u8 sw_ownership_bit(int n, int nent) |
| 77 | { |
| 78 | return (n & nent) ? 1 : 0; |
| 79 | } |
| 80 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 81 | static void *get_sw_cqe(struct mlx5_ib_cq *cq, int n) |
| 82 | { |
| 83 | void *cqe = get_cqe(cq, n & cq->ibcq.cqe); |
| 84 | struct mlx5_cqe64 *cqe64; |
| 85 | |
| 86 | cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 87 | |
| 88 | if (likely((cqe64->op_own) >> 4 != MLX5_CQE_INVALID) && |
| 89 | !((cqe64->op_own & MLX5_CQE_OWNER_MASK) ^ !!(n & (cq->ibcq.cqe + 1)))) { |
| 90 | return cqe; |
| 91 | } else { |
| 92 | return NULL; |
| 93 | } |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | static void *next_cqe_sw(struct mlx5_ib_cq *cq) |
| 97 | { |
| 98 | return get_sw_cqe(cq, cq->mcq.cons_index); |
| 99 | } |
| 100 | |
| 101 | static enum ib_wc_opcode get_umr_comp(struct mlx5_ib_wq *wq, int idx) |
| 102 | { |
| 103 | switch (wq->wr_data[idx]) { |
| 104 | case MLX5_IB_WR_UMR: |
| 105 | return 0; |
| 106 | |
| 107 | case IB_WR_LOCAL_INV: |
| 108 | return IB_WC_LOCAL_INV; |
| 109 | |
| 110 | case IB_WR_FAST_REG_MR: |
| 111 | return IB_WC_FAST_REG_MR; |
| 112 | |
| 113 | default: |
| 114 | pr_warn("unknown completion status\n"); |
| 115 | return 0; |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | static void handle_good_req(struct ib_wc *wc, struct mlx5_cqe64 *cqe, |
| 120 | struct mlx5_ib_wq *wq, int idx) |
| 121 | { |
| 122 | wc->wc_flags = 0; |
| 123 | switch (be32_to_cpu(cqe->sop_drop_qpn) >> 24) { |
| 124 | case MLX5_OPCODE_RDMA_WRITE_IMM: |
| 125 | wc->wc_flags |= IB_WC_WITH_IMM; |
| 126 | case MLX5_OPCODE_RDMA_WRITE: |
| 127 | wc->opcode = IB_WC_RDMA_WRITE; |
| 128 | break; |
| 129 | case MLX5_OPCODE_SEND_IMM: |
| 130 | wc->wc_flags |= IB_WC_WITH_IMM; |
| 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_BIND_MW: |
| 156 | wc->opcode = IB_WC_BIND_MW; |
| 157 | break; |
| 158 | case MLX5_OPCODE_UMR: |
| 159 | wc->opcode = get_umr_comp(wq, idx); |
| 160 | break; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | enum { |
| 165 | MLX5_GRH_IN_BUFFER = 1, |
| 166 | MLX5_GRH_IN_CQE = 2, |
| 167 | }; |
| 168 | |
| 169 | static void handle_responder(struct ib_wc *wc, struct mlx5_cqe64 *cqe, |
| 170 | struct mlx5_ib_qp *qp) |
| 171 | { |
| 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 = 0; |
| 211 | break; |
| 212 | case MLX5_CQE_RESP_SEND_IMM: |
| 213 | wc->opcode = IB_WC_RECV; |
| 214 | wc->wc_flags = IB_WC_WITH_IMM; |
| 215 | wc->ex.imm_data = cqe->imm_inval_pkey; |
| 216 | break; |
| 217 | case MLX5_CQE_RESP_SEND_INV: |
| 218 | wc->opcode = IB_WC_RECV; |
| 219 | wc->wc_flags = IB_WC_WITH_INVALIDATE; |
| 220 | wc->ex.invalidate_rkey = be32_to_cpu(cqe->imm_inval_pkey); |
| 221 | break; |
| 222 | } |
| 223 | wc->slid = be16_to_cpu(cqe->slid); |
| 224 | wc->sl = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0xf; |
| 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 | wc->pkey_index = be32_to_cpu(cqe->imm_inval_pkey) & 0xffff; |
| 230 | } |
| 231 | |
| 232 | static void dump_cqe(struct mlx5_ib_dev *dev, struct mlx5_err_cqe *cqe) |
| 233 | { |
| 234 | __be32 *p = (__be32 *)cqe; |
| 235 | int i; |
| 236 | |
| 237 | mlx5_ib_warn(dev, "dump error cqe\n"); |
| 238 | for (i = 0; i < sizeof(*cqe) / 16; i++, p += 4) |
| 239 | pr_info("%08x %08x %08x %08x\n", be32_to_cpu(p[0]), |
| 240 | be32_to_cpu(p[1]), be32_to_cpu(p[2]), |
| 241 | be32_to_cpu(p[3])); |
| 242 | } |
| 243 | |
| 244 | static void mlx5_handle_error_cqe(struct mlx5_ib_dev *dev, |
| 245 | struct mlx5_err_cqe *cqe, |
| 246 | struct ib_wc *wc) |
| 247 | { |
| 248 | int dump = 1; |
| 249 | |
| 250 | switch (cqe->syndrome) { |
| 251 | case MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR: |
| 252 | wc->status = IB_WC_LOC_LEN_ERR; |
| 253 | break; |
| 254 | case MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR: |
| 255 | wc->status = IB_WC_LOC_QP_OP_ERR; |
| 256 | break; |
| 257 | case MLX5_CQE_SYNDROME_LOCAL_PROT_ERR: |
| 258 | wc->status = IB_WC_LOC_PROT_ERR; |
| 259 | break; |
| 260 | case MLX5_CQE_SYNDROME_WR_FLUSH_ERR: |
| 261 | dump = 0; |
| 262 | wc->status = IB_WC_WR_FLUSH_ERR; |
| 263 | break; |
| 264 | case MLX5_CQE_SYNDROME_MW_BIND_ERR: |
| 265 | wc->status = IB_WC_MW_BIND_ERR; |
| 266 | break; |
| 267 | case MLX5_CQE_SYNDROME_BAD_RESP_ERR: |
| 268 | wc->status = IB_WC_BAD_RESP_ERR; |
| 269 | break; |
| 270 | case MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR: |
| 271 | wc->status = IB_WC_LOC_ACCESS_ERR; |
| 272 | break; |
| 273 | case MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR: |
| 274 | wc->status = IB_WC_REM_INV_REQ_ERR; |
| 275 | break; |
| 276 | case MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR: |
| 277 | wc->status = IB_WC_REM_ACCESS_ERR; |
| 278 | break; |
| 279 | case MLX5_CQE_SYNDROME_REMOTE_OP_ERR: |
| 280 | wc->status = IB_WC_REM_OP_ERR; |
| 281 | break; |
| 282 | case MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR: |
| 283 | wc->status = IB_WC_RETRY_EXC_ERR; |
| 284 | dump = 0; |
| 285 | break; |
| 286 | case MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR: |
| 287 | wc->status = IB_WC_RNR_RETRY_EXC_ERR; |
| 288 | dump = 0; |
| 289 | break; |
| 290 | case MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR: |
| 291 | wc->status = IB_WC_REM_ABORT_ERR; |
| 292 | break; |
| 293 | default: |
| 294 | wc->status = IB_WC_GENERAL_ERR; |
| 295 | break; |
| 296 | } |
| 297 | |
| 298 | wc->vendor_err = cqe->vendor_err_synd; |
| 299 | if (dump) |
| 300 | dump_cqe(dev, cqe); |
| 301 | } |
| 302 | |
| 303 | static int is_atomic_response(struct mlx5_ib_qp *qp, uint16_t idx) |
| 304 | { |
| 305 | /* TBD: waiting decision |
| 306 | */ |
| 307 | return 0; |
| 308 | } |
| 309 | |
| 310 | static void *mlx5_get_atomic_laddr(struct mlx5_ib_qp *qp, uint16_t idx) |
| 311 | { |
| 312 | struct mlx5_wqe_data_seg *dpseg; |
| 313 | void *addr; |
| 314 | |
| 315 | dpseg = mlx5_get_send_wqe(qp, idx) + sizeof(struct mlx5_wqe_ctrl_seg) + |
| 316 | sizeof(struct mlx5_wqe_raddr_seg) + |
| 317 | sizeof(struct mlx5_wqe_atomic_seg); |
| 318 | addr = (void *)(unsigned long)be64_to_cpu(dpseg->addr); |
| 319 | return addr; |
| 320 | } |
| 321 | |
| 322 | static void handle_atomic(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64, |
| 323 | uint16_t idx) |
| 324 | { |
| 325 | void *addr; |
| 326 | int byte_count; |
| 327 | int i; |
| 328 | |
| 329 | if (!is_atomic_response(qp, idx)) |
| 330 | return; |
| 331 | |
| 332 | byte_count = be32_to_cpu(cqe64->byte_cnt); |
| 333 | addr = mlx5_get_atomic_laddr(qp, idx); |
| 334 | |
| 335 | if (byte_count == 4) { |
| 336 | *(uint32_t *)addr = be32_to_cpu(*((__be32 *)addr)); |
| 337 | } else { |
| 338 | for (i = 0; i < byte_count; i += 8) { |
| 339 | *(uint64_t *)addr = be64_to_cpu(*((__be64 *)addr)); |
| 340 | addr += 8; |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | return; |
| 345 | } |
| 346 | |
| 347 | static void handle_atomics(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64, |
| 348 | u16 tail, u16 head) |
| 349 | { |
| 350 | int idx; |
| 351 | |
| 352 | do { |
| 353 | idx = tail & (qp->sq.wqe_cnt - 1); |
| 354 | handle_atomic(qp, cqe64, idx); |
| 355 | if (idx == head) |
| 356 | break; |
| 357 | |
| 358 | tail = qp->sq.w_list[idx].next; |
| 359 | } while (1); |
| 360 | tail = qp->sq.w_list[idx].next; |
| 361 | qp->sq.last_poll = tail; |
| 362 | } |
| 363 | |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 364 | static void free_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf) |
| 365 | { |
| 366 | mlx5_buf_free(&dev->mdev, &buf->buf); |
| 367 | } |
| 368 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 369 | static int mlx5_poll_one(struct mlx5_ib_cq *cq, |
| 370 | struct mlx5_ib_qp **cur_qp, |
| 371 | struct ib_wc *wc) |
| 372 | { |
| 373 | struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); |
| 374 | struct mlx5_err_cqe *err_cqe; |
| 375 | struct mlx5_cqe64 *cqe64; |
| 376 | struct mlx5_core_qp *mqp; |
| 377 | struct mlx5_ib_wq *wq; |
| 378 | uint8_t opcode; |
| 379 | uint32_t qpn; |
| 380 | u16 wqe_ctr; |
| 381 | void *cqe; |
| 382 | int idx; |
| 383 | |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 384 | repoll: |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 385 | cqe = next_cqe_sw(cq); |
| 386 | if (!cqe) |
| 387 | return -EAGAIN; |
| 388 | |
| 389 | cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; |
| 390 | |
| 391 | ++cq->mcq.cons_index; |
| 392 | |
| 393 | /* Make sure we read CQ entry contents after we've checked the |
| 394 | * ownership bit. |
| 395 | */ |
| 396 | rmb(); |
| 397 | |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 398 | opcode = cqe64->op_own >> 4; |
| 399 | if (unlikely(opcode == MLX5_CQE_RESIZE_CQ)) { |
| 400 | if (likely(cq->resize_buf)) { |
| 401 | free_cq_buf(dev, &cq->buf); |
| 402 | cq->buf = *cq->resize_buf; |
| 403 | kfree(cq->resize_buf); |
| 404 | cq->resize_buf = NULL; |
| 405 | goto repoll; |
| 406 | } else { |
| 407 | mlx5_ib_warn(dev, "unexpected resize cqe\n"); |
| 408 | } |
| 409 | } |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 410 | |
| 411 | qpn = ntohl(cqe64->sop_drop_qpn) & 0xffffff; |
| 412 | if (!*cur_qp || (qpn != (*cur_qp)->ibqp.qp_num)) { |
| 413 | /* We do not have to take the QP table lock here, |
| 414 | * because CQs will be locked while QPs are removed |
| 415 | * from the table. |
| 416 | */ |
| 417 | mqp = __mlx5_qp_lookup(&dev->mdev, qpn); |
| 418 | if (unlikely(!mqp)) { |
| 419 | mlx5_ib_warn(dev, "CQE@CQ %06x for unknown QPN %6x\n", |
| 420 | cq->mcq.cqn, qpn); |
| 421 | return -EINVAL; |
| 422 | } |
| 423 | |
| 424 | *cur_qp = to_mibqp(mqp); |
| 425 | } |
| 426 | |
| 427 | wc->qp = &(*cur_qp)->ibqp; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 428 | switch (opcode) { |
| 429 | case MLX5_CQE_REQ: |
| 430 | wq = &(*cur_qp)->sq; |
| 431 | wqe_ctr = be16_to_cpu(cqe64->wqe_counter); |
| 432 | idx = wqe_ctr & (wq->wqe_cnt - 1); |
| 433 | handle_good_req(wc, cqe64, wq, idx); |
| 434 | handle_atomics(*cur_qp, cqe64, wq->last_poll, idx); |
| 435 | wc->wr_id = wq->wrid[idx]; |
| 436 | wq->tail = wq->wqe_head[idx] + 1; |
| 437 | wc->status = IB_WC_SUCCESS; |
| 438 | break; |
| 439 | case MLX5_CQE_RESP_WR_IMM: |
| 440 | case MLX5_CQE_RESP_SEND: |
| 441 | case MLX5_CQE_RESP_SEND_IMM: |
| 442 | case MLX5_CQE_RESP_SEND_INV: |
| 443 | handle_responder(wc, cqe64, *cur_qp); |
| 444 | wc->status = IB_WC_SUCCESS; |
| 445 | break; |
| 446 | case MLX5_CQE_RESIZE_CQ: |
| 447 | break; |
| 448 | case MLX5_CQE_REQ_ERR: |
| 449 | case MLX5_CQE_RESP_ERR: |
| 450 | err_cqe = (struct mlx5_err_cqe *)cqe64; |
| 451 | mlx5_handle_error_cqe(dev, err_cqe, wc); |
| 452 | mlx5_ib_dbg(dev, "%s error cqe on cqn 0x%x:\n", |
| 453 | opcode == MLX5_CQE_REQ_ERR ? |
| 454 | "Requestor" : "Responder", cq->mcq.cqn); |
| 455 | mlx5_ib_dbg(dev, "syndrome 0x%x, vendor syndrome 0x%x\n", |
| 456 | err_cqe->syndrome, err_cqe->vendor_err_synd); |
| 457 | if (opcode == MLX5_CQE_REQ_ERR) { |
| 458 | wq = &(*cur_qp)->sq; |
| 459 | wqe_ctr = be16_to_cpu(cqe64->wqe_counter); |
| 460 | idx = wqe_ctr & (wq->wqe_cnt - 1); |
| 461 | wc->wr_id = wq->wrid[idx]; |
| 462 | wq->tail = wq->wqe_head[idx] + 1; |
| 463 | } else { |
| 464 | struct mlx5_ib_srq *srq; |
| 465 | |
| 466 | if ((*cur_qp)->ibqp.srq) { |
| 467 | srq = to_msrq((*cur_qp)->ibqp.srq); |
| 468 | wqe_ctr = be16_to_cpu(cqe64->wqe_counter); |
| 469 | wc->wr_id = srq->wrid[wqe_ctr]; |
| 470 | mlx5_ib_free_srq_wqe(srq, wqe_ctr); |
| 471 | } else { |
| 472 | wq = &(*cur_qp)->rq; |
| 473 | wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; |
| 474 | ++wq->tail; |
| 475 | } |
| 476 | } |
| 477 | break; |
| 478 | } |
| 479 | |
| 480 | return 0; |
| 481 | } |
| 482 | |
| 483 | int mlx5_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) |
| 484 | { |
| 485 | struct mlx5_ib_cq *cq = to_mcq(ibcq); |
| 486 | struct mlx5_ib_qp *cur_qp = NULL; |
| 487 | unsigned long flags; |
| 488 | int npolled; |
| 489 | int err = 0; |
| 490 | |
| 491 | spin_lock_irqsave(&cq->lock, flags); |
| 492 | |
| 493 | for (npolled = 0; npolled < num_entries; npolled++) { |
| 494 | err = mlx5_poll_one(cq, &cur_qp, wc + npolled); |
| 495 | if (err) |
| 496 | break; |
| 497 | } |
| 498 | |
| 499 | if (npolled) |
| 500 | mlx5_cq_set_ci(&cq->mcq); |
| 501 | |
| 502 | spin_unlock_irqrestore(&cq->lock, flags); |
| 503 | |
| 504 | if (err == 0 || err == -EAGAIN) |
| 505 | return npolled; |
| 506 | else |
| 507 | return err; |
| 508 | } |
| 509 | |
| 510 | int mlx5_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) |
| 511 | { |
| 512 | mlx5_cq_arm(&to_mcq(ibcq)->mcq, |
| 513 | (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ? |
| 514 | MLX5_CQ_DB_REQ_NOT_SOL : MLX5_CQ_DB_REQ_NOT, |
| 515 | to_mdev(ibcq->device)->mdev.priv.uuari.uars[0].map, |
| 516 | MLX5_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->mdev.priv.cq_uar_lock)); |
| 517 | |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | static int alloc_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf, |
| 522 | int nent, int cqe_size) |
| 523 | { |
| 524 | int err; |
| 525 | |
| 526 | err = mlx5_buf_alloc(&dev->mdev, nent * cqe_size, |
| 527 | PAGE_SIZE * 2, &buf->buf); |
| 528 | if (err) |
| 529 | return err; |
| 530 | |
| 531 | buf->cqe_size = cqe_size; |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 532 | buf->nent = nent; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 533 | |
| 534 | return 0; |
| 535 | } |
| 536 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 537 | static int create_cq_user(struct mlx5_ib_dev *dev, struct ib_udata *udata, |
| 538 | struct ib_ucontext *context, struct mlx5_ib_cq *cq, |
| 539 | int entries, struct mlx5_create_cq_mbox_in **cqb, |
| 540 | int *cqe_size, int *index, int *inlen) |
| 541 | { |
| 542 | struct mlx5_ib_create_cq ucmd; |
| 543 | int page_shift; |
| 544 | int npages; |
| 545 | int ncont; |
| 546 | int err; |
| 547 | |
| 548 | if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) |
| 549 | return -EFAULT; |
| 550 | |
| 551 | if (ucmd.cqe_size != 64 && ucmd.cqe_size != 128) |
| 552 | return -EINVAL; |
| 553 | |
| 554 | *cqe_size = ucmd.cqe_size; |
| 555 | |
| 556 | cq->buf.umem = ib_umem_get(context, ucmd.buf_addr, |
| 557 | entries * ucmd.cqe_size, |
| 558 | IB_ACCESS_LOCAL_WRITE, 1); |
| 559 | if (IS_ERR(cq->buf.umem)) { |
| 560 | err = PTR_ERR(cq->buf.umem); |
| 561 | return err; |
| 562 | } |
| 563 | |
| 564 | err = mlx5_ib_db_map_user(to_mucontext(context), ucmd.db_addr, |
| 565 | &cq->db); |
| 566 | if (err) |
| 567 | goto err_umem; |
| 568 | |
| 569 | mlx5_ib_cont_pages(cq->buf.umem, ucmd.buf_addr, &npages, &page_shift, |
| 570 | &ncont, NULL); |
| 571 | mlx5_ib_dbg(dev, "addr 0x%llx, size %u, npages %d, page_shift %d, ncont %d\n", |
| 572 | ucmd.buf_addr, entries * ucmd.cqe_size, npages, page_shift, ncont); |
| 573 | |
| 574 | *inlen = sizeof(**cqb) + sizeof(*(*cqb)->pas) * ncont; |
| 575 | *cqb = mlx5_vzalloc(*inlen); |
| 576 | if (!*cqb) { |
| 577 | err = -ENOMEM; |
| 578 | goto err_db; |
| 579 | } |
| 580 | mlx5_ib_populate_pas(dev, cq->buf.umem, page_shift, (*cqb)->pas, 0); |
Eli Cohen | cf1c5e1 | 2013-10-31 15:26:36 +0200 | [diff] [blame] | 581 | (*cqb)->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 582 | |
| 583 | *index = to_mucontext(context)->uuari.uars[0].index; |
| 584 | |
| 585 | return 0; |
| 586 | |
| 587 | err_db: |
| 588 | mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db); |
| 589 | |
| 590 | err_umem: |
| 591 | ib_umem_release(cq->buf.umem); |
| 592 | return err; |
| 593 | } |
| 594 | |
| 595 | static void destroy_cq_user(struct mlx5_ib_cq *cq, struct ib_ucontext *context) |
| 596 | { |
| 597 | mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db); |
| 598 | ib_umem_release(cq->buf.umem); |
| 599 | } |
| 600 | |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 601 | static void init_cq_buf(struct mlx5_ib_cq *cq, struct mlx5_ib_cq_buf *buf) |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 602 | { |
| 603 | int i; |
| 604 | void *cqe; |
| 605 | struct mlx5_cqe64 *cqe64; |
| 606 | |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 607 | for (i = 0; i < buf->nent; i++) { |
| 608 | cqe = get_cqe_from_buf(buf, i, buf->cqe_size); |
| 609 | cqe64 = buf->cqe_size == 64 ? cqe : cqe + 64; |
| 610 | cqe64->op_own = MLX5_CQE_INVALID << 4; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 611 | } |
| 612 | } |
| 613 | |
| 614 | static int create_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, |
| 615 | int entries, int cqe_size, |
| 616 | struct mlx5_create_cq_mbox_in **cqb, |
| 617 | int *index, int *inlen) |
| 618 | { |
| 619 | int err; |
| 620 | |
| 621 | err = mlx5_db_alloc(&dev->mdev, &cq->db); |
| 622 | if (err) |
| 623 | return err; |
| 624 | |
| 625 | cq->mcq.set_ci_db = cq->db.db; |
| 626 | cq->mcq.arm_db = cq->db.db + 1; |
| 627 | *cq->mcq.set_ci_db = 0; |
| 628 | *cq->mcq.arm_db = 0; |
| 629 | cq->mcq.cqe_sz = cqe_size; |
| 630 | |
| 631 | err = alloc_cq_buf(dev, &cq->buf, entries, cqe_size); |
| 632 | if (err) |
| 633 | goto err_db; |
| 634 | |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 635 | init_cq_buf(cq, &cq->buf); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 636 | |
| 637 | *inlen = sizeof(**cqb) + sizeof(*(*cqb)->pas) * cq->buf.buf.npages; |
| 638 | *cqb = mlx5_vzalloc(*inlen); |
| 639 | if (!*cqb) { |
| 640 | err = -ENOMEM; |
| 641 | goto err_buf; |
| 642 | } |
| 643 | mlx5_fill_page_array(&cq->buf.buf, (*cqb)->pas); |
| 644 | |
Eli Cohen | 1b77d2b | 2013-10-24 12:01:03 +0300 | [diff] [blame] | 645 | (*cqb)->ctx.log_pg_sz = cq->buf.buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 646 | *index = dev->mdev.priv.uuari.uars[0].index; |
| 647 | |
| 648 | return 0; |
| 649 | |
| 650 | err_buf: |
| 651 | free_cq_buf(dev, &cq->buf); |
| 652 | |
| 653 | err_db: |
| 654 | mlx5_db_free(&dev->mdev, &cq->db); |
| 655 | return err; |
| 656 | } |
| 657 | |
| 658 | static void destroy_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq) |
| 659 | { |
| 660 | free_cq_buf(dev, &cq->buf); |
| 661 | mlx5_db_free(&dev->mdev, &cq->db); |
| 662 | } |
| 663 | |
| 664 | struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev, int entries, |
| 665 | int vector, struct ib_ucontext *context, |
| 666 | struct ib_udata *udata) |
| 667 | { |
| 668 | struct mlx5_create_cq_mbox_in *cqb = NULL; |
| 669 | struct mlx5_ib_dev *dev = to_mdev(ibdev); |
| 670 | struct mlx5_ib_cq *cq; |
| 671 | int uninitialized_var(index); |
| 672 | int uninitialized_var(inlen); |
| 673 | int cqe_size; |
| 674 | int irqn; |
| 675 | int eqn; |
| 676 | int err; |
| 677 | |
Eli Cohen | 51ee86a | 2013-10-23 09:53:13 +0300 | [diff] [blame] | 678 | if (entries < 0) |
| 679 | return ERR_PTR(-EINVAL); |
| 680 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 681 | entries = roundup_pow_of_two(entries + 1); |
Eli Cohen | 51ee86a | 2013-10-23 09:53:13 +0300 | [diff] [blame] | 682 | if (entries > dev->mdev.caps.max_cqes) |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 683 | return ERR_PTR(-EINVAL); |
| 684 | |
| 685 | cq = kzalloc(sizeof(*cq), GFP_KERNEL); |
| 686 | if (!cq) |
| 687 | return ERR_PTR(-ENOMEM); |
| 688 | |
| 689 | cq->ibcq.cqe = entries - 1; |
| 690 | mutex_init(&cq->resize_mutex); |
| 691 | spin_lock_init(&cq->lock); |
| 692 | cq->resize_buf = NULL; |
| 693 | cq->resize_umem = NULL; |
| 694 | |
| 695 | if (context) { |
| 696 | err = create_cq_user(dev, udata, context, cq, entries, |
| 697 | &cqb, &cqe_size, &index, &inlen); |
| 698 | if (err) |
| 699 | goto err_create; |
| 700 | } else { |
| 701 | /* for now choose 64 bytes till we have a proper interface */ |
| 702 | cqe_size = 64; |
| 703 | err = create_cq_kernel(dev, cq, entries, cqe_size, &cqb, |
| 704 | &index, &inlen); |
| 705 | if (err) |
| 706 | goto err_create; |
| 707 | } |
| 708 | |
| 709 | cq->cqe_size = cqe_size; |
| 710 | cqb->ctx.cqe_sz_flags = cqe_sz_to_mlx_sz(cqe_size) << 5; |
| 711 | cqb->ctx.log_sz_usr_page = cpu_to_be32((ilog2(entries) << 24) | index); |
| 712 | err = mlx5_vector2eqn(dev, vector, &eqn, &irqn); |
| 713 | if (err) |
| 714 | goto err_cqb; |
| 715 | |
| 716 | cqb->ctx.c_eqn = cpu_to_be16(eqn); |
| 717 | cqb->ctx.db_record_addr = cpu_to_be64(cq->db.dma); |
| 718 | |
| 719 | err = mlx5_core_create_cq(&dev->mdev, &cq->mcq, cqb, inlen); |
| 720 | if (err) |
| 721 | goto err_cqb; |
| 722 | |
| 723 | mlx5_ib_dbg(dev, "cqn 0x%x\n", cq->mcq.cqn); |
| 724 | cq->mcq.irqn = irqn; |
| 725 | cq->mcq.comp = mlx5_ib_cq_comp; |
| 726 | cq->mcq.event = mlx5_ib_cq_event; |
| 727 | |
| 728 | if (context) |
| 729 | if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof(__u32))) { |
| 730 | err = -EFAULT; |
| 731 | goto err_cmd; |
| 732 | } |
| 733 | |
| 734 | |
| 735 | mlx5_vfree(cqb); |
| 736 | return &cq->ibcq; |
| 737 | |
| 738 | err_cmd: |
| 739 | mlx5_core_destroy_cq(&dev->mdev, &cq->mcq); |
| 740 | |
| 741 | err_cqb: |
| 742 | mlx5_vfree(cqb); |
| 743 | if (context) |
| 744 | destroy_cq_user(cq, context); |
| 745 | else |
| 746 | destroy_cq_kernel(dev, cq); |
| 747 | |
| 748 | err_create: |
| 749 | kfree(cq); |
| 750 | |
| 751 | return ERR_PTR(err); |
| 752 | } |
| 753 | |
| 754 | |
| 755 | int mlx5_ib_destroy_cq(struct ib_cq *cq) |
| 756 | { |
| 757 | struct mlx5_ib_dev *dev = to_mdev(cq->device); |
| 758 | struct mlx5_ib_cq *mcq = to_mcq(cq); |
| 759 | struct ib_ucontext *context = NULL; |
| 760 | |
| 761 | if (cq->uobject) |
| 762 | context = cq->uobject->context; |
| 763 | |
| 764 | mlx5_core_destroy_cq(&dev->mdev, &mcq->mcq); |
| 765 | if (context) |
| 766 | destroy_cq_user(mcq, context); |
| 767 | else |
| 768 | destroy_cq_kernel(dev, mcq); |
| 769 | |
| 770 | kfree(mcq); |
| 771 | |
| 772 | return 0; |
| 773 | } |
| 774 | |
Moshe Lazer | cfd8f1d | 2013-10-23 09:53:17 +0300 | [diff] [blame] | 775 | static int is_equal_rsn(struct mlx5_cqe64 *cqe64, u32 rsn) |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 776 | { |
Moshe Lazer | cfd8f1d | 2013-10-23 09:53:17 +0300 | [diff] [blame] | 777 | return rsn == (ntohl(cqe64->sop_drop_qpn) & 0xffffff); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 778 | } |
| 779 | |
| 780 | void __mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 rsn, struct mlx5_ib_srq *srq) |
| 781 | { |
| 782 | struct mlx5_cqe64 *cqe64, *dest64; |
| 783 | void *cqe, *dest; |
| 784 | u32 prod_index; |
| 785 | int nfreed = 0; |
| 786 | u8 owner_bit; |
| 787 | |
| 788 | if (!cq) |
| 789 | return; |
| 790 | |
| 791 | /* First we need to find the current producer index, so we |
| 792 | * know where to start cleaning from. It doesn't matter if HW |
| 793 | * adds new entries after this loop -- the QP we're worried |
| 794 | * about is already in RESET, so the new entries won't come |
| 795 | * from our QP and therefore don't need to be checked. |
| 796 | */ |
| 797 | for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); prod_index++) |
| 798 | if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe) |
| 799 | break; |
| 800 | |
| 801 | /* Now sweep backwards through the CQ, removing CQ entries |
| 802 | * that match our QP by copying older entries on top of them. |
| 803 | */ |
| 804 | while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) { |
| 805 | cqe = get_cqe(cq, prod_index & cq->ibcq.cqe); |
| 806 | cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64; |
Moshe Lazer | cfd8f1d | 2013-10-23 09:53:17 +0300 | [diff] [blame] | 807 | if (is_equal_rsn(cqe64, rsn)) { |
| 808 | if (srq && (ntohl(cqe64->srqn) & 0xffffff)) |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 809 | mlx5_ib_free_srq_wqe(srq, be16_to_cpu(cqe64->wqe_counter)); |
| 810 | ++nfreed; |
| 811 | } else if (nfreed) { |
| 812 | dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe); |
| 813 | dest64 = (cq->mcq.cqe_sz == 64) ? dest : dest + 64; |
| 814 | owner_bit = dest64->op_own & MLX5_CQE_OWNER_MASK; |
| 815 | memcpy(dest, cqe, cq->mcq.cqe_sz); |
| 816 | dest64->op_own = owner_bit | |
| 817 | (dest64->op_own & ~MLX5_CQE_OWNER_MASK); |
| 818 | } |
| 819 | } |
| 820 | |
| 821 | if (nfreed) { |
| 822 | cq->mcq.cons_index += nfreed; |
| 823 | /* Make sure update of buffer contents is done before |
| 824 | * updating consumer index. |
| 825 | */ |
| 826 | wmb(); |
| 827 | mlx5_cq_set_ci(&cq->mcq); |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | void mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 qpn, struct mlx5_ib_srq *srq) |
| 832 | { |
| 833 | if (!cq) |
| 834 | return; |
| 835 | |
| 836 | spin_lock_irq(&cq->lock); |
| 837 | __mlx5_ib_cq_clean(cq, qpn, srq); |
| 838 | spin_unlock_irq(&cq->lock); |
| 839 | } |
| 840 | |
| 841 | int mlx5_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) |
| 842 | { |
Eli Cohen | 3bdb31f | 2014-01-14 17:45:17 +0200 | [diff] [blame] | 843 | struct mlx5_modify_cq_mbox_in *in; |
| 844 | struct mlx5_ib_dev *dev = to_mdev(cq->device); |
| 845 | struct mlx5_ib_cq *mcq = to_mcq(cq); |
| 846 | int err; |
| 847 | u32 fsel; |
| 848 | |
| 849 | if (!(dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_CQ_MODER)) |
| 850 | return -ENOSYS; |
| 851 | |
| 852 | in = kzalloc(sizeof(*in), GFP_KERNEL); |
| 853 | if (!in) |
| 854 | return -ENOMEM; |
| 855 | |
| 856 | in->cqn = cpu_to_be32(mcq->mcq.cqn); |
| 857 | fsel = (MLX5_CQ_MODIFY_PERIOD | MLX5_CQ_MODIFY_COUNT); |
| 858 | in->ctx.cq_period = cpu_to_be16(cq_period); |
| 859 | in->ctx.cq_max_count = cpu_to_be16(cq_count); |
| 860 | in->field_select = cpu_to_be32(fsel); |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 861 | err = mlx5_core_modify_cq(&dev->mdev, &mcq->mcq, in, sizeof(*in)); |
Eli Cohen | 3bdb31f | 2014-01-14 17:45:17 +0200 | [diff] [blame] | 862 | kfree(in); |
| 863 | |
| 864 | if (err) |
| 865 | mlx5_ib_warn(dev, "modify cq 0x%x failed\n", mcq->mcq.cqn); |
| 866 | |
| 867 | return err; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 868 | } |
| 869 | |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 870 | static int resize_user(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, |
| 871 | int entries, struct ib_udata *udata, int *npas, |
| 872 | int *page_shift, int *cqe_size) |
| 873 | { |
| 874 | struct mlx5_ib_resize_cq ucmd; |
| 875 | struct ib_umem *umem; |
| 876 | int err; |
| 877 | int npages; |
| 878 | struct ib_ucontext *context = cq->buf.umem->context; |
| 879 | |
| 880 | if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) |
| 881 | return -EFAULT; |
| 882 | |
| 883 | umem = ib_umem_get(context, ucmd.buf_addr, entries * ucmd.cqe_size, |
| 884 | IB_ACCESS_LOCAL_WRITE, 1); |
| 885 | if (IS_ERR(umem)) { |
| 886 | err = PTR_ERR(umem); |
| 887 | return err; |
| 888 | } |
| 889 | |
| 890 | mlx5_ib_cont_pages(umem, ucmd.buf_addr, &npages, page_shift, |
| 891 | npas, NULL); |
| 892 | |
| 893 | cq->resize_umem = umem; |
| 894 | *cqe_size = ucmd.cqe_size; |
| 895 | |
| 896 | return 0; |
| 897 | } |
| 898 | |
| 899 | static void un_resize_user(struct mlx5_ib_cq *cq) |
| 900 | { |
| 901 | ib_umem_release(cq->resize_umem); |
| 902 | } |
| 903 | |
| 904 | static int resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq, |
| 905 | int entries, int cqe_size) |
| 906 | { |
| 907 | int err; |
| 908 | |
| 909 | cq->resize_buf = kzalloc(sizeof(*cq->resize_buf), GFP_KERNEL); |
| 910 | if (!cq->resize_buf) |
| 911 | return -ENOMEM; |
| 912 | |
| 913 | err = alloc_cq_buf(dev, cq->resize_buf, entries, cqe_size); |
| 914 | if (err) |
| 915 | goto ex; |
| 916 | |
| 917 | init_cq_buf(cq, cq->resize_buf); |
| 918 | |
| 919 | return 0; |
| 920 | |
| 921 | ex: |
| 922 | kfree(cq->resize_buf); |
| 923 | return err; |
| 924 | } |
| 925 | |
| 926 | static void un_resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq) |
| 927 | { |
| 928 | free_cq_buf(dev, cq->resize_buf); |
| 929 | cq->resize_buf = NULL; |
| 930 | } |
| 931 | |
| 932 | static int copy_resize_cqes(struct mlx5_ib_cq *cq) |
| 933 | { |
| 934 | struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device); |
| 935 | struct mlx5_cqe64 *scqe64; |
| 936 | struct mlx5_cqe64 *dcqe64; |
| 937 | void *start_cqe; |
| 938 | void *scqe; |
| 939 | void *dcqe; |
| 940 | int ssize; |
| 941 | int dsize; |
| 942 | int i; |
| 943 | u8 sw_own; |
| 944 | |
| 945 | ssize = cq->buf.cqe_size; |
| 946 | dsize = cq->resize_buf->cqe_size; |
| 947 | if (ssize != dsize) { |
| 948 | mlx5_ib_warn(dev, "resize from different cqe size is not supported\n"); |
| 949 | return -EINVAL; |
| 950 | } |
| 951 | |
| 952 | i = cq->mcq.cons_index; |
| 953 | scqe = get_sw_cqe(cq, i); |
| 954 | scqe64 = ssize == 64 ? scqe : scqe + 64; |
| 955 | start_cqe = scqe; |
| 956 | if (!scqe) { |
| 957 | mlx5_ib_warn(dev, "expected cqe in sw ownership\n"); |
| 958 | return -EINVAL; |
| 959 | } |
| 960 | |
| 961 | while ((scqe64->op_own >> 4) != MLX5_CQE_RESIZE_CQ) { |
| 962 | dcqe = get_cqe_from_buf(cq->resize_buf, |
| 963 | (i + 1) & (cq->resize_buf->nent), |
| 964 | dsize); |
| 965 | dcqe64 = dsize == 64 ? dcqe : dcqe + 64; |
| 966 | sw_own = sw_ownership_bit(i + 1, cq->resize_buf->nent); |
| 967 | memcpy(dcqe, scqe, dsize); |
| 968 | dcqe64->op_own = (dcqe64->op_own & ~MLX5_CQE_OWNER_MASK) | sw_own; |
| 969 | |
| 970 | ++i; |
| 971 | scqe = get_sw_cqe(cq, i); |
| 972 | scqe64 = ssize == 64 ? scqe : scqe + 64; |
| 973 | if (!scqe) { |
| 974 | mlx5_ib_warn(dev, "expected cqe in sw ownership\n"); |
| 975 | return -EINVAL; |
| 976 | } |
| 977 | |
| 978 | if (scqe == start_cqe) { |
| 979 | pr_warn("resize CQ failed to get resize CQE, CQN 0x%x\n", |
| 980 | cq->mcq.cqn); |
| 981 | return -ENOMEM; |
| 982 | } |
| 983 | } |
| 984 | ++cq->mcq.cons_index; |
| 985 | return 0; |
| 986 | } |
| 987 | |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 988 | int mlx5_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata) |
| 989 | { |
Eli Cohen | bde5158 | 2014-01-14 17:45:18 +0200 | [diff] [blame] | 990 | struct mlx5_ib_dev *dev = to_mdev(ibcq->device); |
| 991 | struct mlx5_ib_cq *cq = to_mcq(ibcq); |
| 992 | struct mlx5_modify_cq_mbox_in *in; |
| 993 | int err; |
| 994 | int npas; |
| 995 | int page_shift; |
| 996 | int inlen; |
| 997 | int uninitialized_var(cqe_size); |
| 998 | unsigned long flags; |
| 999 | |
| 1000 | if (!(dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_RESIZE_CQ)) { |
| 1001 | pr_info("Firmware does not support resize CQ\n"); |
| 1002 | return -ENOSYS; |
| 1003 | } |
| 1004 | |
| 1005 | if (entries < 1) |
| 1006 | return -EINVAL; |
| 1007 | |
| 1008 | entries = roundup_pow_of_two(entries + 1); |
| 1009 | if (entries > dev->mdev.caps.max_cqes + 1) |
| 1010 | return -EINVAL; |
| 1011 | |
| 1012 | if (entries == ibcq->cqe + 1) |
| 1013 | return 0; |
| 1014 | |
| 1015 | mutex_lock(&cq->resize_mutex); |
| 1016 | if (udata) { |
| 1017 | err = resize_user(dev, cq, entries, udata, &npas, &page_shift, |
| 1018 | &cqe_size); |
| 1019 | } else { |
| 1020 | cqe_size = 64; |
| 1021 | err = resize_kernel(dev, cq, entries, cqe_size); |
| 1022 | if (!err) { |
| 1023 | npas = cq->resize_buf->buf.npages; |
| 1024 | page_shift = cq->resize_buf->buf.page_shift; |
| 1025 | } |
| 1026 | } |
| 1027 | |
| 1028 | if (err) |
| 1029 | goto ex; |
| 1030 | |
| 1031 | inlen = sizeof(*in) + npas * sizeof(in->pas[0]); |
| 1032 | in = mlx5_vzalloc(inlen); |
| 1033 | if (!in) { |
| 1034 | err = -ENOMEM; |
| 1035 | goto ex_resize; |
| 1036 | } |
| 1037 | |
| 1038 | if (udata) |
| 1039 | mlx5_ib_populate_pas(dev, cq->resize_umem, page_shift, |
| 1040 | in->pas, 0); |
| 1041 | else |
| 1042 | mlx5_fill_page_array(&cq->resize_buf->buf, in->pas); |
| 1043 | |
| 1044 | in->field_select = cpu_to_be32(MLX5_MODIFY_CQ_MASK_LOG_SIZE | |
| 1045 | MLX5_MODIFY_CQ_MASK_PG_OFFSET | |
| 1046 | MLX5_MODIFY_CQ_MASK_PG_SIZE); |
| 1047 | in->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT; |
| 1048 | in->ctx.cqe_sz_flags = cqe_sz_to_mlx_sz(cqe_size) << 5; |
| 1049 | in->ctx.page_offset = 0; |
| 1050 | in->ctx.log_sz_usr_page = cpu_to_be32(ilog2(entries) << 24); |
| 1051 | in->hdr.opmod = cpu_to_be16(MLX5_CQ_OPMOD_RESIZE); |
| 1052 | in->cqn = cpu_to_be32(cq->mcq.cqn); |
| 1053 | |
| 1054 | err = mlx5_core_modify_cq(&dev->mdev, &cq->mcq, in, inlen); |
| 1055 | if (err) |
| 1056 | goto ex_alloc; |
| 1057 | |
| 1058 | if (udata) { |
| 1059 | cq->ibcq.cqe = entries - 1; |
| 1060 | ib_umem_release(cq->buf.umem); |
| 1061 | cq->buf.umem = cq->resize_umem; |
| 1062 | cq->resize_umem = NULL; |
| 1063 | } else { |
| 1064 | struct mlx5_ib_cq_buf tbuf; |
| 1065 | int resized = 0; |
| 1066 | |
| 1067 | spin_lock_irqsave(&cq->lock, flags); |
| 1068 | if (cq->resize_buf) { |
| 1069 | err = copy_resize_cqes(cq); |
| 1070 | if (!err) { |
| 1071 | tbuf = cq->buf; |
| 1072 | cq->buf = *cq->resize_buf; |
| 1073 | kfree(cq->resize_buf); |
| 1074 | cq->resize_buf = NULL; |
| 1075 | resized = 1; |
| 1076 | } |
| 1077 | } |
| 1078 | cq->ibcq.cqe = entries - 1; |
| 1079 | spin_unlock_irqrestore(&cq->lock, flags); |
| 1080 | if (resized) |
| 1081 | free_cq_buf(dev, &tbuf); |
| 1082 | } |
| 1083 | mutex_unlock(&cq->resize_mutex); |
| 1084 | |
| 1085 | mlx5_vfree(in); |
| 1086 | return 0; |
| 1087 | |
| 1088 | ex_alloc: |
| 1089 | mlx5_vfree(in); |
| 1090 | |
| 1091 | ex_resize: |
| 1092 | if (udata) |
| 1093 | un_resize_user(cq); |
| 1094 | else |
| 1095 | un_resize_kernel(dev, cq); |
| 1096 | ex: |
| 1097 | mutex_unlock(&cq->resize_mutex); |
| 1098 | return err; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1099 | } |
| 1100 | |
| 1101 | int mlx5_ib_get_cqe_size(struct mlx5_ib_dev *dev, struct ib_cq *ibcq) |
| 1102 | { |
| 1103 | struct mlx5_ib_cq *cq; |
| 1104 | |
| 1105 | if (!ibcq) |
| 1106 | return 128; |
| 1107 | |
| 1108 | cq = to_mcq(ibcq); |
| 1109 | return cq->cqe_size; |
| 1110 | } |