1 /* 2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/log2.h> 35 #include <linux/etherdevice.h> 36 #include <net/ip.h> 37 #include <linux/slab.h> 38 #include <linux/netdevice.h> 39 40 #include <rdma/ib_cache.h> 41 #include <rdma/ib_pack.h> 42 #include <rdma/ib_addr.h> 43 #include <rdma/ib_mad.h> 44 #include <rdma/uverbs_ioctl.h> 45 46 #include <linux/mlx4/driver.h> 47 #include <linux/mlx4/qp.h> 48 49 #include "mlx4_ib.h" 50 #include <rdma/mlx4-abi.h> 51 52 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, 53 struct mlx4_ib_cq *recv_cq); 54 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, 55 struct mlx4_ib_cq *recv_cq); 56 static int _mlx4_ib_modify_wq(struct ib_wq *ibwq, enum ib_wq_state new_state, 57 struct ib_udata *udata); 58 59 enum { 60 MLX4_IB_ACK_REQ_FREQ = 8, 61 }; 62 63 enum { 64 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83, 65 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f, 66 MLX4_IB_LINK_TYPE_IB = 0, 67 MLX4_IB_LINK_TYPE_ETH = 1 68 }; 69 70 enum { 71 /* 72 * Largest possible UD header: send with GRH and immediate 73 * data plus 18 bytes for an Ethernet header with VLAN/802.1Q 74 * tag. (LRH would only use 8 bytes, so Ethernet is the 75 * biggest case) 76 */ 77 MLX4_IB_UD_HEADER_SIZE = 82, 78 MLX4_IB_LSO_HEADER_SPARE = 128, 79 }; 80 81 struct mlx4_ib_sqp { 82 struct mlx4_ib_qp qp; 83 int pkey_index; 84 u32 qkey; 85 u32 send_psn; 86 struct ib_ud_header ud_header; 87 u8 header_buf[MLX4_IB_UD_HEADER_SIZE]; 88 struct ib_qp *roce_v2_gsi; 89 }; 90 91 enum { 92 MLX4_IB_MIN_SQ_STRIDE = 6, 93 MLX4_IB_CACHE_LINE_SIZE = 64, 94 }; 95 96 enum { 97 MLX4_RAW_QP_MTU = 7, 98 MLX4_RAW_QP_MSGMAX = 31, 99 }; 100 101 #ifndef ETH_ALEN 102 #define ETH_ALEN 6 103 #endif 104 105 static const __be32 mlx4_ib_opcode[] = { 106 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND), 107 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO), 108 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM), 109 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE), 110 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM), 111 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ), 112 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS), 113 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA), 114 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL), 115 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL), 116 [IB_WR_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR), 117 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS), 118 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA), 119 }; 120 121 enum mlx4_ib_source_type { 122 MLX4_IB_QP_SRC = 0, 123 MLX4_IB_RWQ_SRC = 1, 124 }; 125 126 static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp) 127 { 128 return container_of(mqp, struct mlx4_ib_sqp, qp); 129 } 130 131 static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 132 { 133 if (!mlx4_is_master(dev->dev)) 134 return 0; 135 136 return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn && 137 qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn + 138 8 * MLX4_MFUNC_MAX; 139 } 140 141 static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 142 { 143 int proxy_sqp = 0; 144 int real_sqp = 0; 145 int i; 146 /* PPF or Native -- real SQP */ 147 real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) && 148 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn && 149 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3); 150 if (real_sqp) 151 return 1; 152 /* VF or PF -- proxy SQP */ 153 if (mlx4_is_mfunc(dev->dev)) { 154 for (i = 0; i < dev->dev->caps.num_ports; i++) { 155 if (qp->mqp.qpn == dev->dev->caps.spec_qps[i].qp0_proxy || 156 qp->mqp.qpn == dev->dev->caps.spec_qps[i].qp1_proxy) { 157 proxy_sqp = 1; 158 break; 159 } 160 } 161 } 162 if (proxy_sqp) 163 return 1; 164 165 return !!(qp->flags & MLX4_IB_ROCE_V2_GSI_QP); 166 } 167 168 /* used for INIT/CLOSE port logic */ 169 static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 170 { 171 int proxy_qp0 = 0; 172 int real_qp0 = 0; 173 int i; 174 /* PPF or Native -- real QP0 */ 175 real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) && 176 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn && 177 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1); 178 if (real_qp0) 179 return 1; 180 /* VF or PF -- proxy QP0 */ 181 if (mlx4_is_mfunc(dev->dev)) { 182 for (i = 0; i < dev->dev->caps.num_ports; i++) { 183 if (qp->mqp.qpn == dev->dev->caps.spec_qps[i].qp0_proxy) { 184 proxy_qp0 = 1; 185 break; 186 } 187 } 188 } 189 return proxy_qp0; 190 } 191 192 static void *get_wqe(struct mlx4_ib_qp *qp, int offset) 193 { 194 return mlx4_buf_offset(&qp->buf, offset); 195 } 196 197 static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n) 198 { 199 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift)); 200 } 201 202 static void *get_send_wqe(struct mlx4_ib_qp *qp, int n) 203 { 204 return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift)); 205 } 206 207 /* 208 * Stamp a SQ WQE so that it is invalid if prefetched by marking the 209 * first four bytes of every 64 byte chunk with 0xffffffff, except for 210 * the very first chunk of the WQE. 211 */ 212 static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n) 213 { 214 __be32 *wqe; 215 int i; 216 int s; 217 void *buf; 218 struct mlx4_wqe_ctrl_seg *ctrl; 219 220 buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1)); 221 ctrl = (struct mlx4_wqe_ctrl_seg *)buf; 222 s = (ctrl->qpn_vlan.fence_size & 0x3f) << 4; 223 for (i = 64; i < s; i += 64) { 224 wqe = buf + i; 225 *wqe = cpu_to_be32(0xffffffff); 226 } 227 } 228 229 static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type) 230 { 231 struct ib_event event; 232 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp; 233 234 if (type == MLX4_EVENT_TYPE_PATH_MIG) 235 to_mibqp(qp)->port = to_mibqp(qp)->alt_port; 236 237 if (ibqp->event_handler) { 238 event.device = ibqp->device; 239 event.element.qp = ibqp; 240 switch (type) { 241 case MLX4_EVENT_TYPE_PATH_MIG: 242 event.event = IB_EVENT_PATH_MIG; 243 break; 244 case MLX4_EVENT_TYPE_COMM_EST: 245 event.event = IB_EVENT_COMM_EST; 246 break; 247 case MLX4_EVENT_TYPE_SQ_DRAINED: 248 event.event = IB_EVENT_SQ_DRAINED; 249 break; 250 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE: 251 event.event = IB_EVENT_QP_LAST_WQE_REACHED; 252 break; 253 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR: 254 event.event = IB_EVENT_QP_FATAL; 255 break; 256 case MLX4_EVENT_TYPE_PATH_MIG_FAILED: 257 event.event = IB_EVENT_PATH_MIG_ERR; 258 break; 259 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR: 260 event.event = IB_EVENT_QP_REQ_ERR; 261 break; 262 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR: 263 event.event = IB_EVENT_QP_ACCESS_ERR; 264 break; 265 default: 266 pr_warn("Unexpected event type %d " 267 "on QP %06x\n", type, qp->qpn); 268 return; 269 } 270 271 ibqp->event_handler(&event, ibqp->qp_context); 272 } 273 } 274 275 static void mlx4_ib_wq_event(struct mlx4_qp *qp, enum mlx4_event type) 276 { 277 pr_warn_ratelimited("Unexpected event type %d on WQ 0x%06x. Events are not supported for WQs\n", 278 type, qp->qpn); 279 } 280 281 static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags) 282 { 283 /* 284 * UD WQEs must have a datagram segment. 285 * RC and UC WQEs might have a remote address segment. 286 * MLX WQEs need two extra inline data segments (for the UD 287 * header and space for the ICRC). 288 */ 289 switch (type) { 290 case MLX4_IB_QPT_UD: 291 return sizeof (struct mlx4_wqe_ctrl_seg) + 292 sizeof (struct mlx4_wqe_datagram_seg) + 293 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0); 294 case MLX4_IB_QPT_PROXY_SMI_OWNER: 295 case MLX4_IB_QPT_PROXY_SMI: 296 case MLX4_IB_QPT_PROXY_GSI: 297 return sizeof (struct mlx4_wqe_ctrl_seg) + 298 sizeof (struct mlx4_wqe_datagram_seg) + 64; 299 case MLX4_IB_QPT_TUN_SMI_OWNER: 300 case MLX4_IB_QPT_TUN_GSI: 301 return sizeof (struct mlx4_wqe_ctrl_seg) + 302 sizeof (struct mlx4_wqe_datagram_seg); 303 304 case MLX4_IB_QPT_UC: 305 return sizeof (struct mlx4_wqe_ctrl_seg) + 306 sizeof (struct mlx4_wqe_raddr_seg); 307 case MLX4_IB_QPT_RC: 308 return sizeof (struct mlx4_wqe_ctrl_seg) + 309 sizeof (struct mlx4_wqe_masked_atomic_seg) + 310 sizeof (struct mlx4_wqe_raddr_seg); 311 case MLX4_IB_QPT_SMI: 312 case MLX4_IB_QPT_GSI: 313 return sizeof (struct mlx4_wqe_ctrl_seg) + 314 ALIGN(MLX4_IB_UD_HEADER_SIZE + 315 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE, 316 MLX4_INLINE_ALIGN) * 317 sizeof (struct mlx4_wqe_inline_seg), 318 sizeof (struct mlx4_wqe_data_seg)) + 319 ALIGN(4 + 320 sizeof (struct mlx4_wqe_inline_seg), 321 sizeof (struct mlx4_wqe_data_seg)); 322 default: 323 return sizeof (struct mlx4_wqe_ctrl_seg); 324 } 325 } 326 327 static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, 328 bool is_user, bool has_rq, struct mlx4_ib_qp *qp, 329 u32 inl_recv_sz) 330 { 331 /* Sanity check RQ size before proceeding */ 332 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE || 333 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg)) 334 return -EINVAL; 335 336 if (!has_rq) { 337 if (cap->max_recv_wr || inl_recv_sz) 338 return -EINVAL; 339 340 qp->rq.wqe_cnt = qp->rq.max_gs = 0; 341 } else { 342 u32 max_inl_recv_sz = dev->dev->caps.max_rq_sg * 343 sizeof(struct mlx4_wqe_data_seg); 344 u32 wqe_size; 345 346 /* HW requires >= 1 RQ entry with >= 1 gather entry */ 347 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge || 348 inl_recv_sz > max_inl_recv_sz)) 349 return -EINVAL; 350 351 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr)); 352 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge)); 353 wqe_size = qp->rq.max_gs * sizeof(struct mlx4_wqe_data_seg); 354 qp->rq.wqe_shift = ilog2(max_t(u32, wqe_size, inl_recv_sz)); 355 } 356 357 /* leave userspace return values as they were, so as not to break ABI */ 358 if (is_user) { 359 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt; 360 cap->max_recv_sge = qp->rq.max_gs; 361 } else { 362 cap->max_recv_wr = qp->rq.max_post = 363 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt); 364 cap->max_recv_sge = min(qp->rq.max_gs, 365 min(dev->dev->caps.max_sq_sg, 366 dev->dev->caps.max_rq_sg)); 367 } 368 369 return 0; 370 } 371 372 static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, 373 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp) 374 { 375 int s; 376 377 /* Sanity check SQ size before proceeding */ 378 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) || 379 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) || 380 cap->max_inline_data + send_wqe_overhead(type, qp->flags) + 381 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz) 382 return -EINVAL; 383 384 /* 385 * For MLX transport we need 2 extra S/G entries: 386 * one for the header and one for the checksum at the end 387 */ 388 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI || 389 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) && 390 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg) 391 return -EINVAL; 392 393 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg), 394 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) + 395 send_wqe_overhead(type, qp->flags); 396 397 if (s > dev->dev->caps.max_sq_desc_sz) 398 return -EINVAL; 399 400 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s)); 401 402 /* 403 * We need to leave 2 KB + 1 WR of headroom in the SQ to 404 * allow HW to prefetch. 405 */ 406 qp->sq_spare_wqes = MLX4_IB_SQ_HEADROOM(qp->sq.wqe_shift); 407 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr + 408 qp->sq_spare_wqes); 409 410 qp->sq.max_gs = 411 (min(dev->dev->caps.max_sq_desc_sz, 412 (1 << qp->sq.wqe_shift)) - 413 send_wqe_overhead(type, qp->flags)) / 414 sizeof (struct mlx4_wqe_data_seg); 415 416 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + 417 (qp->sq.wqe_cnt << qp->sq.wqe_shift); 418 if (qp->rq.wqe_shift > qp->sq.wqe_shift) { 419 qp->rq.offset = 0; 420 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift; 421 } else { 422 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift; 423 qp->sq.offset = 0; 424 } 425 426 cap->max_send_wr = qp->sq.max_post = 427 qp->sq.wqe_cnt - qp->sq_spare_wqes; 428 cap->max_send_sge = min(qp->sq.max_gs, 429 min(dev->dev->caps.max_sq_sg, 430 dev->dev->caps.max_rq_sg)); 431 /* We don't support inline sends for kernel QPs (yet) */ 432 cap->max_inline_data = 0; 433 434 return 0; 435 } 436 437 static int set_user_sq_size(struct mlx4_ib_dev *dev, 438 struct mlx4_ib_qp *qp, 439 struct mlx4_ib_create_qp *ucmd) 440 { 441 /* Sanity check SQ size before proceeding */ 442 if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes || 443 ucmd->log_sq_stride > 444 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) || 445 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE) 446 return -EINVAL; 447 448 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count; 449 qp->sq.wqe_shift = ucmd->log_sq_stride; 450 451 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + 452 (qp->sq.wqe_cnt << qp->sq.wqe_shift); 453 454 return 0; 455 } 456 457 static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp) 458 { 459 int i; 460 461 qp->sqp_proxy_rcv = 462 kmalloc_array(qp->rq.wqe_cnt, sizeof(struct mlx4_ib_buf), 463 GFP_KERNEL); 464 if (!qp->sqp_proxy_rcv) 465 return -ENOMEM; 466 for (i = 0; i < qp->rq.wqe_cnt; i++) { 467 qp->sqp_proxy_rcv[i].addr = 468 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr), 469 GFP_KERNEL); 470 if (!qp->sqp_proxy_rcv[i].addr) 471 goto err; 472 qp->sqp_proxy_rcv[i].map = 473 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr, 474 sizeof (struct mlx4_ib_proxy_sqp_hdr), 475 DMA_FROM_DEVICE); 476 if (ib_dma_mapping_error(dev, qp->sqp_proxy_rcv[i].map)) { 477 kfree(qp->sqp_proxy_rcv[i].addr); 478 goto err; 479 } 480 } 481 return 0; 482 483 err: 484 while (i > 0) { 485 --i; 486 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map, 487 sizeof (struct mlx4_ib_proxy_sqp_hdr), 488 DMA_FROM_DEVICE); 489 kfree(qp->sqp_proxy_rcv[i].addr); 490 } 491 kfree(qp->sqp_proxy_rcv); 492 qp->sqp_proxy_rcv = NULL; 493 return -ENOMEM; 494 } 495 496 static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp) 497 { 498 int i; 499 500 for (i = 0; i < qp->rq.wqe_cnt; i++) { 501 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map, 502 sizeof (struct mlx4_ib_proxy_sqp_hdr), 503 DMA_FROM_DEVICE); 504 kfree(qp->sqp_proxy_rcv[i].addr); 505 } 506 kfree(qp->sqp_proxy_rcv); 507 } 508 509 static bool qp_has_rq(struct ib_qp_init_attr *attr) 510 { 511 if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT) 512 return false; 513 514 return !attr->srq; 515 } 516 517 static int qp0_enabled_vf(struct mlx4_dev *dev, int qpn) 518 { 519 int i; 520 for (i = 0; i < dev->caps.num_ports; i++) { 521 if (qpn == dev->caps.spec_qps[i].qp0_proxy) 522 return !!dev->caps.spec_qps[i].qp0_qkey; 523 } 524 return 0; 525 } 526 527 static void mlx4_ib_free_qp_counter(struct mlx4_ib_dev *dev, 528 struct mlx4_ib_qp *qp) 529 { 530 mutex_lock(&dev->counters_table[qp->port - 1].mutex); 531 mlx4_counter_free(dev->dev, qp->counter_index->index); 532 list_del(&qp->counter_index->list); 533 mutex_unlock(&dev->counters_table[qp->port - 1].mutex); 534 535 kfree(qp->counter_index); 536 qp->counter_index = NULL; 537 } 538 539 static int set_qp_rss(struct mlx4_ib_dev *dev, struct mlx4_ib_rss *rss_ctx, 540 struct ib_qp_init_attr *init_attr, 541 struct mlx4_ib_create_qp_rss *ucmd) 542 { 543 rss_ctx->base_qpn_tbl_sz = init_attr->rwq_ind_tbl->ind_tbl[0]->wq_num | 544 (init_attr->rwq_ind_tbl->log_ind_tbl_size << 24); 545 546 if ((ucmd->rx_hash_function == MLX4_IB_RX_HASH_FUNC_TOEPLITZ) && 547 (dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS_TOP)) { 548 memcpy(rss_ctx->rss_key, ucmd->rx_hash_key, 549 MLX4_EN_RSS_KEY_SIZE); 550 } else { 551 pr_debug("RX Hash function is not supported\n"); 552 return (-EOPNOTSUPP); 553 } 554 555 if (ucmd->rx_hash_fields_mask & ~(MLX4_IB_RX_HASH_SRC_IPV4 | 556 MLX4_IB_RX_HASH_DST_IPV4 | 557 MLX4_IB_RX_HASH_SRC_IPV6 | 558 MLX4_IB_RX_HASH_DST_IPV6 | 559 MLX4_IB_RX_HASH_SRC_PORT_TCP | 560 MLX4_IB_RX_HASH_DST_PORT_TCP | 561 MLX4_IB_RX_HASH_SRC_PORT_UDP | 562 MLX4_IB_RX_HASH_DST_PORT_UDP | 563 MLX4_IB_RX_HASH_INNER)) { 564 pr_debug("RX Hash fields_mask has unsupported mask (0x%llx)\n", 565 ucmd->rx_hash_fields_mask); 566 return (-EOPNOTSUPP); 567 } 568 569 if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_IPV4) && 570 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_IPV4)) { 571 rss_ctx->flags = MLX4_RSS_IPV4; 572 } else if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_IPV4) || 573 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_IPV4)) { 574 pr_debug("RX Hash fields_mask is not supported - both IPv4 SRC and DST must be set\n"); 575 return (-EOPNOTSUPP); 576 } 577 578 if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_IPV6) && 579 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_IPV6)) { 580 rss_ctx->flags |= MLX4_RSS_IPV6; 581 } else if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_IPV6) || 582 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_IPV6)) { 583 pr_debug("RX Hash fields_mask is not supported - both IPv6 SRC and DST must be set\n"); 584 return (-EOPNOTSUPP); 585 } 586 587 if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_PORT_UDP) && 588 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_PORT_UDP)) { 589 if (!(dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 590 pr_debug("RX Hash fields_mask for UDP is not supported\n"); 591 return (-EOPNOTSUPP); 592 } 593 594 if (rss_ctx->flags & MLX4_RSS_IPV4) 595 rss_ctx->flags |= MLX4_RSS_UDP_IPV4; 596 if (rss_ctx->flags & MLX4_RSS_IPV6) 597 rss_ctx->flags |= MLX4_RSS_UDP_IPV6; 598 if (!(rss_ctx->flags & (MLX4_RSS_IPV6 | MLX4_RSS_IPV4))) { 599 pr_debug("RX Hash fields_mask is not supported - UDP must be set with IPv4 or IPv6\n"); 600 return (-EOPNOTSUPP); 601 } 602 } else if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_PORT_UDP) || 603 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_PORT_UDP)) { 604 pr_debug("RX Hash fields_mask is not supported - both UDP SRC and DST must be set\n"); 605 return (-EOPNOTSUPP); 606 } 607 608 if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_PORT_TCP) && 609 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_PORT_TCP)) { 610 if (rss_ctx->flags & MLX4_RSS_IPV4) 611 rss_ctx->flags |= MLX4_RSS_TCP_IPV4; 612 if (rss_ctx->flags & MLX4_RSS_IPV6) 613 rss_ctx->flags |= MLX4_RSS_TCP_IPV6; 614 if (!(rss_ctx->flags & (MLX4_RSS_IPV6 | MLX4_RSS_IPV4))) { 615 pr_debug("RX Hash fields_mask is not supported - TCP must be set with IPv4 or IPv6\n"); 616 return (-EOPNOTSUPP); 617 } 618 } else if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_PORT_TCP) || 619 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_PORT_TCP)) { 620 pr_debug("RX Hash fields_mask is not supported - both TCP SRC and DST must be set\n"); 621 return (-EOPNOTSUPP); 622 } 623 624 if (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_INNER) { 625 if (dev->dev->caps.tunnel_offload_mode == 626 MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) { 627 /* 628 * Hash according to inner headers if exist, otherwise 629 * according to outer headers. 630 */ 631 rss_ctx->flags |= MLX4_RSS_BY_INNER_HEADERS_IPONLY; 632 } else { 633 pr_debug("RSS Hash for inner headers isn't supported\n"); 634 return (-EOPNOTSUPP); 635 } 636 } 637 638 return 0; 639 } 640 641 static int create_qp_rss(struct mlx4_ib_dev *dev, 642 struct ib_qp_init_attr *init_attr, 643 struct mlx4_ib_create_qp_rss *ucmd, 644 struct mlx4_ib_qp *qp) 645 { 646 int qpn; 647 int err; 648 649 qp->mqp.usage = MLX4_RES_USAGE_USER_VERBS; 650 651 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn, 0, qp->mqp.usage); 652 if (err) 653 return err; 654 655 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp); 656 if (err) 657 goto err_qpn; 658 659 mutex_init(&qp->mutex); 660 661 INIT_LIST_HEAD(&qp->gid_list); 662 INIT_LIST_HEAD(&qp->steering_rules); 663 664 qp->mlx4_ib_qp_type = MLX4_IB_QPT_RAW_PACKET; 665 qp->state = IB_QPS_RESET; 666 667 /* Set dummy send resources to be compatible with HV and PRM */ 668 qp->sq_no_prefetch = 1; 669 qp->sq.wqe_cnt = 1; 670 qp->sq.wqe_shift = MLX4_IB_MIN_SQ_STRIDE; 671 qp->buf_size = qp->sq.wqe_cnt << MLX4_IB_MIN_SQ_STRIDE; 672 qp->mtt = (to_mqp( 673 (struct ib_qp *)init_attr->rwq_ind_tbl->ind_tbl[0]))->mtt; 674 675 qp->rss_ctx = kzalloc(sizeof(*qp->rss_ctx), GFP_KERNEL); 676 if (!qp->rss_ctx) { 677 err = -ENOMEM; 678 goto err_qp_alloc; 679 } 680 681 err = set_qp_rss(dev, qp->rss_ctx, init_attr, ucmd); 682 if (err) 683 goto err; 684 685 return 0; 686 687 err: 688 kfree(qp->rss_ctx); 689 690 err_qp_alloc: 691 mlx4_qp_remove(dev->dev, &qp->mqp); 692 mlx4_qp_free(dev->dev, &qp->mqp); 693 694 err_qpn: 695 mlx4_qp_release_range(dev->dev, qpn, 1); 696 return err; 697 } 698 699 static struct ib_qp *_mlx4_ib_create_qp_rss(struct ib_pd *pd, 700 struct ib_qp_init_attr *init_attr, 701 struct ib_udata *udata) 702 { 703 struct mlx4_ib_qp *qp; 704 struct mlx4_ib_create_qp_rss ucmd = {}; 705 size_t required_cmd_sz; 706 int err; 707 708 if (!udata) { 709 pr_debug("RSS QP with NULL udata\n"); 710 return ERR_PTR(-EINVAL); 711 } 712 713 if (udata->outlen) 714 return ERR_PTR(-EOPNOTSUPP); 715 716 required_cmd_sz = offsetof(typeof(ucmd), reserved1) + 717 sizeof(ucmd.reserved1); 718 if (udata->inlen < required_cmd_sz) { 719 pr_debug("invalid inlen\n"); 720 return ERR_PTR(-EINVAL); 721 } 722 723 if (ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen))) { 724 pr_debug("copy failed\n"); 725 return ERR_PTR(-EFAULT); 726 } 727 728 if (memchr_inv(ucmd.reserved, 0, sizeof(ucmd.reserved))) 729 return ERR_PTR(-EOPNOTSUPP); 730 731 if (ucmd.comp_mask || ucmd.reserved1) 732 return ERR_PTR(-EOPNOTSUPP); 733 734 if (udata->inlen > sizeof(ucmd) && 735 !ib_is_udata_cleared(udata, sizeof(ucmd), 736 udata->inlen - sizeof(ucmd))) { 737 pr_debug("inlen is not supported\n"); 738 return ERR_PTR(-EOPNOTSUPP); 739 } 740 741 if (init_attr->qp_type != IB_QPT_RAW_PACKET) { 742 pr_debug("RSS QP with unsupported QP type %d\n", 743 init_attr->qp_type); 744 return ERR_PTR(-EOPNOTSUPP); 745 } 746 747 if (init_attr->create_flags) { 748 pr_debug("RSS QP doesn't support create flags\n"); 749 return ERR_PTR(-EOPNOTSUPP); 750 } 751 752 if (init_attr->send_cq || init_attr->cap.max_send_wr) { 753 pr_debug("RSS QP with unsupported send attributes\n"); 754 return ERR_PTR(-EOPNOTSUPP); 755 } 756 757 qp = kzalloc(sizeof(*qp), GFP_KERNEL); 758 if (!qp) 759 return ERR_PTR(-ENOMEM); 760 761 qp->pri.vid = 0xFFFF; 762 qp->alt.vid = 0xFFFF; 763 764 err = create_qp_rss(to_mdev(pd->device), init_attr, &ucmd, qp); 765 if (err) { 766 kfree(qp); 767 return ERR_PTR(err); 768 } 769 770 qp->ibqp.qp_num = qp->mqp.qpn; 771 772 return &qp->ibqp; 773 } 774 775 /* 776 * This function allocates a WQN from a range which is consecutive and aligned 777 * to its size. In case the range is full, then it creates a new range and 778 * allocates WQN from it. The new range will be used for following allocations. 779 */ 780 static int mlx4_ib_alloc_wqn(struct mlx4_ib_ucontext *context, 781 struct mlx4_ib_qp *qp, int range_size, int *wqn) 782 { 783 struct mlx4_ib_dev *dev = to_mdev(context->ibucontext.device); 784 struct mlx4_wqn_range *range; 785 int err = 0; 786 787 mutex_lock(&context->wqn_ranges_mutex); 788 789 range = list_first_entry_or_null(&context->wqn_ranges_list, 790 struct mlx4_wqn_range, list); 791 792 if (!range || (range->refcount == range->size) || range->dirty) { 793 range = kzalloc(sizeof(*range), GFP_KERNEL); 794 if (!range) { 795 err = -ENOMEM; 796 goto out; 797 } 798 799 err = mlx4_qp_reserve_range(dev->dev, range_size, 800 range_size, &range->base_wqn, 0, 801 qp->mqp.usage); 802 if (err) { 803 kfree(range); 804 goto out; 805 } 806 807 range->size = range_size; 808 list_add(&range->list, &context->wqn_ranges_list); 809 } else if (range_size != 1) { 810 /* 811 * Requesting a new range (>1) when last range is still open, is 812 * not valid. 813 */ 814 err = -EINVAL; 815 goto out; 816 } 817 818 qp->wqn_range = range; 819 820 *wqn = range->base_wqn + range->refcount; 821 822 range->refcount++; 823 824 out: 825 mutex_unlock(&context->wqn_ranges_mutex); 826 827 return err; 828 } 829 830 static void mlx4_ib_release_wqn(struct mlx4_ib_ucontext *context, 831 struct mlx4_ib_qp *qp, bool dirty_release) 832 { 833 struct mlx4_ib_dev *dev = to_mdev(context->ibucontext.device); 834 struct mlx4_wqn_range *range; 835 836 mutex_lock(&context->wqn_ranges_mutex); 837 838 range = qp->wqn_range; 839 840 range->refcount--; 841 if (!range->refcount) { 842 mlx4_qp_release_range(dev->dev, range->base_wqn, 843 range->size); 844 list_del(&range->list); 845 kfree(range); 846 } else if (dirty_release) { 847 /* 848 * A range which one of its WQNs is destroyed, won't be able to be 849 * reused for further WQN allocations. 850 * The next created WQ will allocate a new range. 851 */ 852 range->dirty = 1; 853 } 854 855 mutex_unlock(&context->wqn_ranges_mutex); 856 } 857 858 static int create_rq(struct ib_pd *pd, struct ib_qp_init_attr *init_attr, 859 struct ib_udata *udata, struct mlx4_ib_qp *qp) 860 { 861 struct mlx4_ib_dev *dev = to_mdev(pd->device); 862 int qpn; 863 int err; 864 struct mlx4_ib_ucontext *context = rdma_udata_to_drv_context( 865 udata, struct mlx4_ib_ucontext, ibucontext); 866 struct mlx4_ib_cq *mcq; 867 unsigned long flags; 868 int range_size; 869 struct mlx4_ib_create_wq wq; 870 size_t copy_len; 871 int shift; 872 int n; 873 874 qp->mlx4_ib_qp_type = MLX4_IB_QPT_RAW_PACKET; 875 876 mutex_init(&qp->mutex); 877 spin_lock_init(&qp->sq.lock); 878 spin_lock_init(&qp->rq.lock); 879 INIT_LIST_HEAD(&qp->gid_list); 880 INIT_LIST_HEAD(&qp->steering_rules); 881 882 qp->state = IB_QPS_RESET; 883 884 copy_len = min(sizeof(struct mlx4_ib_create_wq), udata->inlen); 885 886 if (ib_copy_from_udata(&wq, udata, copy_len)) { 887 err = -EFAULT; 888 goto err; 889 } 890 891 if (wq.comp_mask || wq.reserved[0] || wq.reserved[1] || 892 wq.reserved[2]) { 893 pr_debug("user command isn't supported\n"); 894 err = -EOPNOTSUPP; 895 goto err; 896 } 897 898 if (wq.log_range_size > ilog2(dev->dev->caps.max_rss_tbl_sz)) { 899 pr_debug("WQN range size must be equal or smaller than %d\n", 900 dev->dev->caps.max_rss_tbl_sz); 901 err = -EOPNOTSUPP; 902 goto err; 903 } 904 range_size = 1 << wq.log_range_size; 905 906 if (init_attr->create_flags & IB_QP_CREATE_SCATTER_FCS) 907 qp->flags |= MLX4_IB_QP_SCATTER_FCS; 908 909 err = set_rq_size(dev, &init_attr->cap, true, true, qp, qp->inl_recv_sz); 910 if (err) 911 goto err; 912 913 qp->sq_no_prefetch = 1; 914 qp->sq.wqe_cnt = 1; 915 qp->sq.wqe_shift = MLX4_IB_MIN_SQ_STRIDE; 916 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + 917 (qp->sq.wqe_cnt << qp->sq.wqe_shift); 918 919 qp->umem = ib_umem_get(udata, wq.buf_addr, qp->buf_size, 0, 0); 920 if (IS_ERR(qp->umem)) { 921 err = PTR_ERR(qp->umem); 922 goto err; 923 } 924 925 n = ib_umem_page_count(qp->umem); 926 shift = mlx4_ib_umem_calc_optimal_mtt_size(qp->umem, 0, &n); 927 err = mlx4_mtt_init(dev->dev, n, shift, &qp->mtt); 928 929 if (err) 930 goto err_buf; 931 932 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem); 933 if (err) 934 goto err_mtt; 935 936 err = mlx4_ib_db_map_user(udata, wq.db_addr, &qp->db); 937 if (err) 938 goto err_mtt; 939 qp->mqp.usage = MLX4_RES_USAGE_USER_VERBS; 940 941 err = mlx4_ib_alloc_wqn(context, qp, range_size, &qpn); 942 if (err) 943 goto err_wrid; 944 945 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp); 946 if (err) 947 goto err_qpn; 948 949 /* 950 * Hardware wants QPN written in big-endian order (after 951 * shifting) for send doorbell. Precompute this value to save 952 * a little bit when posting sends. 953 */ 954 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8); 955 956 qp->mqp.event = mlx4_ib_wq_event; 957 958 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags); 959 mlx4_ib_lock_cqs(to_mcq(init_attr->send_cq), 960 to_mcq(init_attr->recv_cq)); 961 /* Maintain device to QPs access, needed for further handling 962 * via reset flow 963 */ 964 list_add_tail(&qp->qps_list, &dev->qp_list); 965 /* Maintain CQ to QPs access, needed for further handling 966 * via reset flow 967 */ 968 mcq = to_mcq(init_attr->send_cq); 969 list_add_tail(&qp->cq_send_list, &mcq->send_qp_list); 970 mcq = to_mcq(init_attr->recv_cq); 971 list_add_tail(&qp->cq_recv_list, &mcq->recv_qp_list); 972 mlx4_ib_unlock_cqs(to_mcq(init_attr->send_cq), 973 to_mcq(init_attr->recv_cq)); 974 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags); 975 return 0; 976 977 err_qpn: 978 mlx4_ib_release_wqn(context, qp, 0); 979 err_wrid: 980 mlx4_ib_db_unmap_user(context, &qp->db); 981 982 err_mtt: 983 mlx4_mtt_cleanup(dev->dev, &qp->mtt); 984 err_buf: 985 ib_umem_release(qp->umem); 986 err: 987 return err; 988 } 989 990 static int create_qp_common(struct ib_pd *pd, struct ib_qp_init_attr *init_attr, 991 struct ib_udata *udata, int sqpn, 992 struct mlx4_ib_qp **caller_qp) 993 { 994 struct mlx4_ib_dev *dev = to_mdev(pd->device); 995 int qpn; 996 int err; 997 struct mlx4_ib_sqp *sqp = NULL; 998 struct mlx4_ib_qp *qp; 999 struct mlx4_ib_ucontext *context = rdma_udata_to_drv_context( 1000 udata, struct mlx4_ib_ucontext, ibucontext); 1001 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type; 1002 struct mlx4_ib_cq *mcq; 1003 unsigned long flags; 1004 1005 /* When tunneling special qps, we use a plain UD qp */ 1006 if (sqpn) { 1007 if (mlx4_is_mfunc(dev->dev) && 1008 (!mlx4_is_master(dev->dev) || 1009 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) { 1010 if (init_attr->qp_type == IB_QPT_GSI) 1011 qp_type = MLX4_IB_QPT_PROXY_GSI; 1012 else { 1013 if (mlx4_is_master(dev->dev) || 1014 qp0_enabled_vf(dev->dev, sqpn)) 1015 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER; 1016 else 1017 qp_type = MLX4_IB_QPT_PROXY_SMI; 1018 } 1019 } 1020 qpn = sqpn; 1021 /* add extra sg entry for tunneling */ 1022 init_attr->cap.max_recv_sge++; 1023 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) { 1024 struct mlx4_ib_qp_tunnel_init_attr *tnl_init = 1025 container_of(init_attr, 1026 struct mlx4_ib_qp_tunnel_init_attr, init_attr); 1027 if ((tnl_init->proxy_qp_type != IB_QPT_SMI && 1028 tnl_init->proxy_qp_type != IB_QPT_GSI) || 1029 !mlx4_is_master(dev->dev)) 1030 return -EINVAL; 1031 if (tnl_init->proxy_qp_type == IB_QPT_GSI) 1032 qp_type = MLX4_IB_QPT_TUN_GSI; 1033 else if (tnl_init->slave == mlx4_master_func_num(dev->dev) || 1034 mlx4_vf_smi_enabled(dev->dev, tnl_init->slave, 1035 tnl_init->port)) 1036 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER; 1037 else 1038 qp_type = MLX4_IB_QPT_TUN_SMI; 1039 /* we are definitely in the PPF here, since we are creating 1040 * tunnel QPs. base_tunnel_sqpn is therefore valid. */ 1041 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave 1042 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1; 1043 sqpn = qpn; 1044 } 1045 1046 if (!*caller_qp) { 1047 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI || 1048 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER | 1049 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) { 1050 sqp = kzalloc(sizeof(struct mlx4_ib_sqp), GFP_KERNEL); 1051 if (!sqp) 1052 return -ENOMEM; 1053 qp = &sqp->qp; 1054 } else { 1055 qp = kzalloc(sizeof(struct mlx4_ib_qp), GFP_KERNEL); 1056 if (!qp) 1057 return -ENOMEM; 1058 } 1059 qp->pri.vid = 0xFFFF; 1060 qp->alt.vid = 0xFFFF; 1061 } else 1062 qp = *caller_qp; 1063 1064 qp->mlx4_ib_qp_type = qp_type; 1065 1066 mutex_init(&qp->mutex); 1067 spin_lock_init(&qp->sq.lock); 1068 spin_lock_init(&qp->rq.lock); 1069 INIT_LIST_HEAD(&qp->gid_list); 1070 INIT_LIST_HEAD(&qp->steering_rules); 1071 1072 qp->state = IB_QPS_RESET; 1073 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) 1074 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); 1075 1076 if (udata) { 1077 struct mlx4_ib_create_qp ucmd; 1078 size_t copy_len; 1079 int shift; 1080 int n; 1081 1082 copy_len = sizeof(struct mlx4_ib_create_qp); 1083 1084 if (ib_copy_from_udata(&ucmd, udata, copy_len)) { 1085 err = -EFAULT; 1086 goto err; 1087 } 1088 1089 qp->inl_recv_sz = ucmd.inl_recv_sz; 1090 1091 if (init_attr->create_flags & IB_QP_CREATE_SCATTER_FCS) { 1092 if (!(dev->dev->caps.flags & 1093 MLX4_DEV_CAP_FLAG_FCS_KEEP)) { 1094 pr_debug("scatter FCS is unsupported\n"); 1095 err = -EOPNOTSUPP; 1096 goto err; 1097 } 1098 1099 qp->flags |= MLX4_IB_QP_SCATTER_FCS; 1100 } 1101 1102 err = set_rq_size(dev, &init_attr->cap, udata, 1103 qp_has_rq(init_attr), qp, qp->inl_recv_sz); 1104 if (err) 1105 goto err; 1106 1107 qp->sq_no_prefetch = ucmd.sq_no_prefetch; 1108 1109 err = set_user_sq_size(dev, qp, &ucmd); 1110 if (err) 1111 goto err; 1112 1113 qp->umem = 1114 ib_umem_get(udata, ucmd.buf_addr, qp->buf_size, 0, 0); 1115 if (IS_ERR(qp->umem)) { 1116 err = PTR_ERR(qp->umem); 1117 goto err; 1118 } 1119 1120 n = ib_umem_page_count(qp->umem); 1121 shift = mlx4_ib_umem_calc_optimal_mtt_size(qp->umem, 0, &n); 1122 err = mlx4_mtt_init(dev->dev, n, shift, &qp->mtt); 1123 1124 if (err) 1125 goto err_buf; 1126 1127 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem); 1128 if (err) 1129 goto err_mtt; 1130 1131 if (qp_has_rq(init_attr)) { 1132 err = mlx4_ib_db_map_user(udata, ucmd.db_addr, &qp->db); 1133 if (err) 1134 goto err_mtt; 1135 } 1136 qp->mqp.usage = MLX4_RES_USAGE_USER_VERBS; 1137 } else { 1138 err = set_rq_size(dev, &init_attr->cap, udata, 1139 qp_has_rq(init_attr), qp, 0); 1140 if (err) 1141 goto err; 1142 1143 qp->sq_no_prefetch = 0; 1144 1145 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO) 1146 qp->flags |= MLX4_IB_QP_LSO; 1147 1148 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) { 1149 if (dev->steering_support == 1150 MLX4_STEERING_MODE_DEVICE_MANAGED) 1151 qp->flags |= MLX4_IB_QP_NETIF; 1152 else 1153 goto err; 1154 } 1155 1156 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp); 1157 if (err) 1158 goto err; 1159 1160 if (qp_has_rq(init_attr)) { 1161 err = mlx4_db_alloc(dev->dev, &qp->db, 0); 1162 if (err) 1163 goto err; 1164 1165 *qp->db.db = 0; 1166 } 1167 1168 if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, 1169 &qp->buf)) { 1170 err = -ENOMEM; 1171 goto err_db; 1172 } 1173 1174 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift, 1175 &qp->mtt); 1176 if (err) 1177 goto err_buf; 1178 1179 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf); 1180 if (err) 1181 goto err_mtt; 1182 1183 qp->sq.wrid = kvmalloc_array(qp->sq.wqe_cnt, 1184 sizeof(u64), GFP_KERNEL); 1185 qp->rq.wrid = kvmalloc_array(qp->rq.wqe_cnt, 1186 sizeof(u64), GFP_KERNEL); 1187 if (!qp->sq.wrid || !qp->rq.wrid) { 1188 err = -ENOMEM; 1189 goto err_wrid; 1190 } 1191 qp->mqp.usage = MLX4_RES_USAGE_DRIVER; 1192 } 1193 1194 if (sqpn) { 1195 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 1196 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) { 1197 if (alloc_proxy_bufs(pd->device, qp)) { 1198 err = -ENOMEM; 1199 goto err_wrid; 1200 } 1201 } 1202 } else { 1203 /* Raw packet QPNs may not have bits 6,7 set in their qp_num; 1204 * otherwise, the WQE BlueFlame setup flow wrongly causes 1205 * VLAN insertion. */ 1206 if (init_attr->qp_type == IB_QPT_RAW_PACKET) 1207 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn, 1208 (init_attr->cap.max_send_wr ? 1209 MLX4_RESERVE_ETH_BF_QP : 0) | 1210 (init_attr->cap.max_recv_wr ? 1211 MLX4_RESERVE_A0_QP : 0), 1212 qp->mqp.usage); 1213 else 1214 if (qp->flags & MLX4_IB_QP_NETIF) 1215 err = mlx4_ib_steer_qp_alloc(dev, 1, &qpn); 1216 else 1217 err = mlx4_qp_reserve_range(dev->dev, 1, 1, 1218 &qpn, 0, qp->mqp.usage); 1219 if (err) 1220 goto err_proxy; 1221 } 1222 1223 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) 1224 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK; 1225 1226 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp); 1227 if (err) 1228 goto err_qpn; 1229 1230 if (init_attr->qp_type == IB_QPT_XRC_TGT) 1231 qp->mqp.qpn |= (1 << 23); 1232 1233 /* 1234 * Hardware wants QPN written in big-endian order (after 1235 * shifting) for send doorbell. Precompute this value to save 1236 * a little bit when posting sends. 1237 */ 1238 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8); 1239 1240 qp->mqp.event = mlx4_ib_qp_event; 1241 1242 if (!*caller_qp) 1243 *caller_qp = qp; 1244 1245 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags); 1246 mlx4_ib_lock_cqs(to_mcq(init_attr->send_cq), 1247 to_mcq(init_attr->recv_cq)); 1248 /* Maintain device to QPs access, needed for further handling 1249 * via reset flow 1250 */ 1251 list_add_tail(&qp->qps_list, &dev->qp_list); 1252 /* Maintain CQ to QPs access, needed for further handling 1253 * via reset flow 1254 */ 1255 mcq = to_mcq(init_attr->send_cq); 1256 list_add_tail(&qp->cq_send_list, &mcq->send_qp_list); 1257 mcq = to_mcq(init_attr->recv_cq); 1258 list_add_tail(&qp->cq_recv_list, &mcq->recv_qp_list); 1259 mlx4_ib_unlock_cqs(to_mcq(init_attr->send_cq), 1260 to_mcq(init_attr->recv_cq)); 1261 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags); 1262 return 0; 1263 1264 err_qpn: 1265 if (!sqpn) { 1266 if (qp->flags & MLX4_IB_QP_NETIF) 1267 mlx4_ib_steer_qp_free(dev, qpn, 1); 1268 else 1269 mlx4_qp_release_range(dev->dev, qpn, 1); 1270 } 1271 err_proxy: 1272 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI) 1273 free_proxy_bufs(pd->device, qp); 1274 err_wrid: 1275 if (udata) { 1276 if (qp_has_rq(init_attr)) 1277 mlx4_ib_db_unmap_user(context, &qp->db); 1278 } else { 1279 kvfree(qp->sq.wrid); 1280 kvfree(qp->rq.wrid); 1281 } 1282 1283 err_mtt: 1284 mlx4_mtt_cleanup(dev->dev, &qp->mtt); 1285 1286 err_buf: 1287 if (!qp->umem) 1288 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); 1289 ib_umem_release(qp->umem); 1290 1291 err_db: 1292 if (!udata && qp_has_rq(init_attr)) 1293 mlx4_db_free(dev->dev, &qp->db); 1294 1295 err: 1296 if (!sqp && !*caller_qp) 1297 kfree(qp); 1298 kfree(sqp); 1299 1300 return err; 1301 } 1302 1303 static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state) 1304 { 1305 switch (state) { 1306 case IB_QPS_RESET: return MLX4_QP_STATE_RST; 1307 case IB_QPS_INIT: return MLX4_QP_STATE_INIT; 1308 case IB_QPS_RTR: return MLX4_QP_STATE_RTR; 1309 case IB_QPS_RTS: return MLX4_QP_STATE_RTS; 1310 case IB_QPS_SQD: return MLX4_QP_STATE_SQD; 1311 case IB_QPS_SQE: return MLX4_QP_STATE_SQER; 1312 case IB_QPS_ERR: return MLX4_QP_STATE_ERR; 1313 default: return -1; 1314 } 1315 } 1316 1317 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) 1318 __acquires(&send_cq->lock) __acquires(&recv_cq->lock) 1319 { 1320 if (send_cq == recv_cq) { 1321 spin_lock(&send_cq->lock); 1322 __acquire(&recv_cq->lock); 1323 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { 1324 spin_lock(&send_cq->lock); 1325 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING); 1326 } else { 1327 spin_lock(&recv_cq->lock); 1328 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING); 1329 } 1330 } 1331 1332 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) 1333 __releases(&send_cq->lock) __releases(&recv_cq->lock) 1334 { 1335 if (send_cq == recv_cq) { 1336 __release(&recv_cq->lock); 1337 spin_unlock(&send_cq->lock); 1338 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { 1339 spin_unlock(&recv_cq->lock); 1340 spin_unlock(&send_cq->lock); 1341 } else { 1342 spin_unlock(&send_cq->lock); 1343 spin_unlock(&recv_cq->lock); 1344 } 1345 } 1346 1347 static void del_gid_entries(struct mlx4_ib_qp *qp) 1348 { 1349 struct mlx4_ib_gid_entry *ge, *tmp; 1350 1351 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) { 1352 list_del(&ge->list); 1353 kfree(ge); 1354 } 1355 } 1356 1357 static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp) 1358 { 1359 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT) 1360 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd); 1361 else 1362 return to_mpd(qp->ibqp.pd); 1363 } 1364 1365 static void get_cqs(struct mlx4_ib_qp *qp, enum mlx4_ib_source_type src, 1366 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq) 1367 { 1368 switch (qp->ibqp.qp_type) { 1369 case IB_QPT_XRC_TGT: 1370 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq); 1371 *recv_cq = *send_cq; 1372 break; 1373 case IB_QPT_XRC_INI: 1374 *send_cq = to_mcq(qp->ibqp.send_cq); 1375 *recv_cq = *send_cq; 1376 break; 1377 default: 1378 *recv_cq = (src == MLX4_IB_QP_SRC) ? to_mcq(qp->ibqp.recv_cq) : 1379 to_mcq(qp->ibwq.cq); 1380 *send_cq = (src == MLX4_IB_QP_SRC) ? to_mcq(qp->ibqp.send_cq) : 1381 *recv_cq; 1382 break; 1383 } 1384 } 1385 1386 static void destroy_qp_rss(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 1387 { 1388 if (qp->state != IB_QPS_RESET) { 1389 int i; 1390 1391 for (i = 0; i < (1 << qp->ibqp.rwq_ind_tbl->log_ind_tbl_size); 1392 i++) { 1393 struct ib_wq *ibwq = qp->ibqp.rwq_ind_tbl->ind_tbl[i]; 1394 struct mlx4_ib_qp *wq = to_mqp((struct ib_qp *)ibwq); 1395 1396 mutex_lock(&wq->mutex); 1397 1398 wq->rss_usecnt--; 1399 1400 mutex_unlock(&wq->mutex); 1401 } 1402 1403 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state), 1404 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp)) 1405 pr_warn("modify QP %06x to RESET failed.\n", 1406 qp->mqp.qpn); 1407 } 1408 1409 mlx4_qp_remove(dev->dev, &qp->mqp); 1410 mlx4_qp_free(dev->dev, &qp->mqp); 1411 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1); 1412 del_gid_entries(qp); 1413 kfree(qp->rss_ctx); 1414 } 1415 1416 static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, 1417 enum mlx4_ib_source_type src, 1418 struct ib_udata *udata) 1419 { 1420 struct mlx4_ib_cq *send_cq, *recv_cq; 1421 unsigned long flags; 1422 1423 if (qp->state != IB_QPS_RESET) { 1424 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state), 1425 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp)) 1426 pr_warn("modify QP %06x to RESET failed.\n", 1427 qp->mqp.qpn); 1428 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) { 1429 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 1430 qp->pri.smac = 0; 1431 qp->pri.smac_port = 0; 1432 } 1433 if (qp->alt.smac) { 1434 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 1435 qp->alt.smac = 0; 1436 } 1437 if (qp->pri.vid < 0x1000) { 1438 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid); 1439 qp->pri.vid = 0xFFFF; 1440 qp->pri.candidate_vid = 0xFFFF; 1441 qp->pri.update_vid = 0; 1442 } 1443 if (qp->alt.vid < 0x1000) { 1444 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid); 1445 qp->alt.vid = 0xFFFF; 1446 qp->alt.candidate_vid = 0xFFFF; 1447 qp->alt.update_vid = 0; 1448 } 1449 } 1450 1451 get_cqs(qp, src, &send_cq, &recv_cq); 1452 1453 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags); 1454 mlx4_ib_lock_cqs(send_cq, recv_cq); 1455 1456 /* del from lists under both locks above to protect reset flow paths */ 1457 list_del(&qp->qps_list); 1458 list_del(&qp->cq_send_list); 1459 list_del(&qp->cq_recv_list); 1460 if (!udata) { 1461 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn, 1462 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL); 1463 if (send_cq != recv_cq) 1464 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); 1465 } 1466 1467 mlx4_qp_remove(dev->dev, &qp->mqp); 1468 1469 mlx4_ib_unlock_cqs(send_cq, recv_cq); 1470 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags); 1471 1472 mlx4_qp_free(dev->dev, &qp->mqp); 1473 1474 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp)) { 1475 if (qp->flags & MLX4_IB_QP_NETIF) 1476 mlx4_ib_steer_qp_free(dev, qp->mqp.qpn, 1); 1477 else if (src == MLX4_IB_RWQ_SRC) 1478 mlx4_ib_release_wqn( 1479 rdma_udata_to_drv_context( 1480 udata, 1481 struct mlx4_ib_ucontext, 1482 ibucontext), 1483 qp, 1); 1484 else 1485 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1); 1486 } 1487 1488 mlx4_mtt_cleanup(dev->dev, &qp->mtt); 1489 1490 if (udata) { 1491 if (qp->rq.wqe_cnt) { 1492 struct mlx4_ib_ucontext *mcontext = 1493 rdma_udata_to_drv_context( 1494 udata, 1495 struct mlx4_ib_ucontext, 1496 ibucontext); 1497 1498 mlx4_ib_db_unmap_user(mcontext, &qp->db); 1499 } 1500 } else { 1501 kvfree(qp->sq.wrid); 1502 kvfree(qp->rq.wrid); 1503 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 1504 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) 1505 free_proxy_bufs(&dev->ib_dev, qp); 1506 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); 1507 if (qp->rq.wqe_cnt) 1508 mlx4_db_free(dev->dev, &qp->db); 1509 } 1510 ib_umem_release(qp->umem); 1511 1512 del_gid_entries(qp); 1513 } 1514 1515 static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr) 1516 { 1517 /* Native or PPF */ 1518 if (!mlx4_is_mfunc(dev->dev) || 1519 (mlx4_is_master(dev->dev) && 1520 attr->create_flags & MLX4_IB_SRIOV_SQP)) { 1521 return dev->dev->phys_caps.base_sqpn + 1522 (attr->qp_type == IB_QPT_SMI ? 0 : 2) + 1523 attr->port_num - 1; 1524 } 1525 /* PF or VF -- creating proxies */ 1526 if (attr->qp_type == IB_QPT_SMI) 1527 return dev->dev->caps.spec_qps[attr->port_num - 1].qp0_proxy; 1528 else 1529 return dev->dev->caps.spec_qps[attr->port_num - 1].qp1_proxy; 1530 } 1531 1532 static struct ib_qp *_mlx4_ib_create_qp(struct ib_pd *pd, 1533 struct ib_qp_init_attr *init_attr, 1534 struct ib_udata *udata) 1535 { 1536 struct mlx4_ib_qp *qp = NULL; 1537 int err; 1538 int sup_u_create_flags = MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK; 1539 u16 xrcdn = 0; 1540 1541 if (init_attr->rwq_ind_tbl) 1542 return _mlx4_ib_create_qp_rss(pd, init_attr, udata); 1543 1544 /* 1545 * We only support LSO, vendor flag1, and multicast loopback blocking, 1546 * and only for kernel UD QPs. 1547 */ 1548 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO | 1549 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK | 1550 MLX4_IB_SRIOV_TUNNEL_QP | 1551 MLX4_IB_SRIOV_SQP | 1552 MLX4_IB_QP_NETIF | 1553 MLX4_IB_QP_CREATE_ROCE_V2_GSI)) 1554 return ERR_PTR(-EINVAL); 1555 1556 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) { 1557 if (init_attr->qp_type != IB_QPT_UD) 1558 return ERR_PTR(-EINVAL); 1559 } 1560 1561 if (init_attr->create_flags) { 1562 if (udata && init_attr->create_flags & ~(sup_u_create_flags)) 1563 return ERR_PTR(-EINVAL); 1564 1565 if ((init_attr->create_flags & ~(MLX4_IB_SRIOV_SQP | 1566 MLX4_IB_QP_CREATE_ROCE_V2_GSI | 1567 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) && 1568 init_attr->qp_type != IB_QPT_UD) || 1569 (init_attr->create_flags & MLX4_IB_SRIOV_SQP && 1570 init_attr->qp_type > IB_QPT_GSI) || 1571 (init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI && 1572 init_attr->qp_type != IB_QPT_GSI)) 1573 return ERR_PTR(-EINVAL); 1574 } 1575 1576 switch (init_attr->qp_type) { 1577 case IB_QPT_XRC_TGT: 1578 pd = to_mxrcd(init_attr->xrcd)->pd; 1579 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn; 1580 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq; 1581 /* fall through */ 1582 case IB_QPT_XRC_INI: 1583 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC)) 1584 return ERR_PTR(-ENOSYS); 1585 init_attr->recv_cq = init_attr->send_cq; 1586 /* fall through */ 1587 case IB_QPT_RC: 1588 case IB_QPT_UC: 1589 case IB_QPT_RAW_PACKET: 1590 qp = kzalloc(sizeof(*qp), GFP_KERNEL); 1591 if (!qp) 1592 return ERR_PTR(-ENOMEM); 1593 qp->pri.vid = 0xFFFF; 1594 qp->alt.vid = 0xFFFF; 1595 /* fall through */ 1596 case IB_QPT_UD: 1597 { 1598 err = create_qp_common(pd, init_attr, udata, 0, &qp); 1599 if (err) { 1600 kfree(qp); 1601 return ERR_PTR(err); 1602 } 1603 1604 qp->ibqp.qp_num = qp->mqp.qpn; 1605 qp->xrcdn = xrcdn; 1606 1607 break; 1608 } 1609 case IB_QPT_SMI: 1610 case IB_QPT_GSI: 1611 { 1612 int sqpn; 1613 1614 /* Userspace is not allowed to create special QPs: */ 1615 if (udata) 1616 return ERR_PTR(-EINVAL); 1617 if (init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI) { 1618 int res = mlx4_qp_reserve_range(to_mdev(pd->device)->dev, 1619 1, 1, &sqpn, 0, 1620 MLX4_RES_USAGE_DRIVER); 1621 1622 if (res) 1623 return ERR_PTR(res); 1624 } else { 1625 sqpn = get_sqp_num(to_mdev(pd->device), init_attr); 1626 } 1627 1628 err = create_qp_common(pd, init_attr, udata, sqpn, &qp); 1629 if (err) 1630 return ERR_PTR(err); 1631 1632 qp->port = init_attr->port_num; 1633 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1634 init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI ? sqpn : 1; 1635 break; 1636 } 1637 default: 1638 /* Don't support raw QPs */ 1639 return ERR_PTR(-EINVAL); 1640 } 1641 1642 return &qp->ibqp; 1643 } 1644 1645 struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd, 1646 struct ib_qp_init_attr *init_attr, 1647 struct ib_udata *udata) { 1648 struct ib_device *device = pd ? pd->device : init_attr->xrcd->device; 1649 struct ib_qp *ibqp; 1650 struct mlx4_ib_dev *dev = to_mdev(device); 1651 1652 ibqp = _mlx4_ib_create_qp(pd, init_attr, udata); 1653 1654 if (!IS_ERR(ibqp) && 1655 (init_attr->qp_type == IB_QPT_GSI) && 1656 !(init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI)) { 1657 struct mlx4_ib_sqp *sqp = to_msqp((to_mqp(ibqp))); 1658 int is_eth = rdma_cap_eth_ah(&dev->ib_dev, init_attr->port_num); 1659 1660 if (is_eth && 1661 dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2) { 1662 init_attr->create_flags |= MLX4_IB_QP_CREATE_ROCE_V2_GSI; 1663 sqp->roce_v2_gsi = ib_create_qp(pd, init_attr); 1664 1665 if (IS_ERR(sqp->roce_v2_gsi)) { 1666 pr_err("Failed to create GSI QP for RoCEv2 (%ld)\n", PTR_ERR(sqp->roce_v2_gsi)); 1667 sqp->roce_v2_gsi = NULL; 1668 } else { 1669 sqp = to_msqp(to_mqp(sqp->roce_v2_gsi)); 1670 sqp->qp.flags |= MLX4_IB_ROCE_V2_GSI_QP; 1671 } 1672 1673 init_attr->create_flags &= ~MLX4_IB_QP_CREATE_ROCE_V2_GSI; 1674 } 1675 } 1676 return ibqp; 1677 } 1678 1679 static int _mlx4_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 1680 { 1681 struct mlx4_ib_dev *dev = to_mdev(qp->device); 1682 struct mlx4_ib_qp *mqp = to_mqp(qp); 1683 1684 if (is_qp0(dev, mqp)) 1685 mlx4_CLOSE_PORT(dev->dev, mqp->port); 1686 1687 if (mqp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI && 1688 dev->qp1_proxy[mqp->port - 1] == mqp) { 1689 mutex_lock(&dev->qp1_proxy_lock[mqp->port - 1]); 1690 dev->qp1_proxy[mqp->port - 1] = NULL; 1691 mutex_unlock(&dev->qp1_proxy_lock[mqp->port - 1]); 1692 } 1693 1694 if (mqp->counter_index) 1695 mlx4_ib_free_qp_counter(dev, mqp); 1696 1697 if (qp->rwq_ind_tbl) { 1698 destroy_qp_rss(dev, mqp); 1699 } else { 1700 destroy_qp_common(dev, mqp, MLX4_IB_QP_SRC, udata); 1701 } 1702 1703 if (is_sqp(dev, mqp)) 1704 kfree(to_msqp(mqp)); 1705 else 1706 kfree(mqp); 1707 1708 return 0; 1709 } 1710 1711 int mlx4_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 1712 { 1713 struct mlx4_ib_qp *mqp = to_mqp(qp); 1714 1715 if (mqp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) { 1716 struct mlx4_ib_sqp *sqp = to_msqp(mqp); 1717 1718 if (sqp->roce_v2_gsi) 1719 ib_destroy_qp(sqp->roce_v2_gsi); 1720 } 1721 1722 return _mlx4_ib_destroy_qp(qp, udata); 1723 } 1724 1725 static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type) 1726 { 1727 switch (type) { 1728 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC; 1729 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC; 1730 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD; 1731 case MLX4_IB_QPT_XRC_INI: 1732 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC; 1733 case MLX4_IB_QPT_SMI: 1734 case MLX4_IB_QPT_GSI: 1735 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX; 1736 1737 case MLX4_IB_QPT_PROXY_SMI_OWNER: 1738 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ? 1739 MLX4_QP_ST_MLX : -1); 1740 case MLX4_IB_QPT_PROXY_SMI: 1741 case MLX4_IB_QPT_TUN_SMI: 1742 case MLX4_IB_QPT_PROXY_GSI: 1743 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ? 1744 MLX4_QP_ST_UD : -1); 1745 default: return -1; 1746 } 1747 } 1748 1749 static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr, 1750 int attr_mask) 1751 { 1752 u8 dest_rd_atomic; 1753 u32 access_flags; 1754 u32 hw_access_flags = 0; 1755 1756 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1757 dest_rd_atomic = attr->max_dest_rd_atomic; 1758 else 1759 dest_rd_atomic = qp->resp_depth; 1760 1761 if (attr_mask & IB_QP_ACCESS_FLAGS) 1762 access_flags = attr->qp_access_flags; 1763 else 1764 access_flags = qp->atomic_rd_en; 1765 1766 if (!dest_rd_atomic) 1767 access_flags &= IB_ACCESS_REMOTE_WRITE; 1768 1769 if (access_flags & IB_ACCESS_REMOTE_READ) 1770 hw_access_flags |= MLX4_QP_BIT_RRE; 1771 if (access_flags & IB_ACCESS_REMOTE_ATOMIC) 1772 hw_access_flags |= MLX4_QP_BIT_RAE; 1773 if (access_flags & IB_ACCESS_REMOTE_WRITE) 1774 hw_access_flags |= MLX4_QP_BIT_RWE; 1775 1776 return cpu_to_be32(hw_access_flags); 1777 } 1778 1779 static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr, 1780 int attr_mask) 1781 { 1782 if (attr_mask & IB_QP_PKEY_INDEX) 1783 sqp->pkey_index = attr->pkey_index; 1784 if (attr_mask & IB_QP_QKEY) 1785 sqp->qkey = attr->qkey; 1786 if (attr_mask & IB_QP_SQ_PSN) 1787 sqp->send_psn = attr->sq_psn; 1788 } 1789 1790 static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port) 1791 { 1792 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6); 1793 } 1794 1795 static int _mlx4_set_path(struct mlx4_ib_dev *dev, 1796 const struct rdma_ah_attr *ah, 1797 u64 smac, u16 vlan_tag, struct mlx4_qp_path *path, 1798 struct mlx4_roce_smac_vlan_info *smac_info, u8 port) 1799 { 1800 int vidx; 1801 int smac_index; 1802 int err; 1803 1804 path->grh_mylmc = rdma_ah_get_path_bits(ah) & 0x7f; 1805 path->rlid = cpu_to_be16(rdma_ah_get_dlid(ah)); 1806 if (rdma_ah_get_static_rate(ah)) { 1807 path->static_rate = rdma_ah_get_static_rate(ah) + 1808 MLX4_STAT_RATE_OFFSET; 1809 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && 1810 !(1 << path->static_rate & dev->dev->caps.stat_rate_support)) 1811 --path->static_rate; 1812 } else 1813 path->static_rate = 0; 1814 1815 if (rdma_ah_get_ah_flags(ah) & IB_AH_GRH) { 1816 const struct ib_global_route *grh = rdma_ah_read_grh(ah); 1817 int real_sgid_index = 1818 mlx4_ib_gid_index_to_real_index(dev, grh->sgid_attr); 1819 1820 if (real_sgid_index < 0) 1821 return real_sgid_index; 1822 if (real_sgid_index >= dev->dev->caps.gid_table_len[port]) { 1823 pr_err("sgid_index (%u) too large. max is %d\n", 1824 real_sgid_index, dev->dev->caps.gid_table_len[port] - 1); 1825 return -1; 1826 } 1827 1828 path->grh_mylmc |= 1 << 7; 1829 path->mgid_index = real_sgid_index; 1830 path->hop_limit = grh->hop_limit; 1831 path->tclass_flowlabel = 1832 cpu_to_be32((grh->traffic_class << 20) | 1833 (grh->flow_label)); 1834 memcpy(path->rgid, grh->dgid.raw, 16); 1835 } 1836 1837 if (ah->type == RDMA_AH_ATTR_TYPE_ROCE) { 1838 if (!(rdma_ah_get_ah_flags(ah) & IB_AH_GRH)) 1839 return -1; 1840 1841 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | 1842 ((port - 1) << 6) | ((rdma_ah_get_sl(ah) & 7) << 3); 1843 1844 path->feup |= MLX4_FEUP_FORCE_ETH_UP; 1845 if (vlan_tag < 0x1000) { 1846 if (smac_info->vid < 0x1000) { 1847 /* both valid vlan ids */ 1848 if (smac_info->vid != vlan_tag) { 1849 /* different VIDs. unreg old and reg new */ 1850 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx); 1851 if (err) 1852 return err; 1853 smac_info->candidate_vid = vlan_tag; 1854 smac_info->candidate_vlan_index = vidx; 1855 smac_info->candidate_vlan_port = port; 1856 smac_info->update_vid = 1; 1857 path->vlan_index = vidx; 1858 } else { 1859 path->vlan_index = smac_info->vlan_index; 1860 } 1861 } else { 1862 /* no current vlan tag in qp */ 1863 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx); 1864 if (err) 1865 return err; 1866 smac_info->candidate_vid = vlan_tag; 1867 smac_info->candidate_vlan_index = vidx; 1868 smac_info->candidate_vlan_port = port; 1869 smac_info->update_vid = 1; 1870 path->vlan_index = vidx; 1871 } 1872 path->feup |= MLX4_FVL_FORCE_ETH_VLAN; 1873 path->fl = 1 << 6; 1874 } else { 1875 /* have current vlan tag. unregister it at modify-qp success */ 1876 if (smac_info->vid < 0x1000) { 1877 smac_info->candidate_vid = 0xFFFF; 1878 smac_info->update_vid = 1; 1879 } 1880 } 1881 1882 /* get smac_index for RoCE use. 1883 * If no smac was yet assigned, register one. 1884 * If one was already assigned, but the new mac differs, 1885 * unregister the old one and register the new one. 1886 */ 1887 if ((!smac_info->smac && !smac_info->smac_port) || 1888 smac_info->smac != smac) { 1889 /* register candidate now, unreg if needed, after success */ 1890 smac_index = mlx4_register_mac(dev->dev, port, smac); 1891 if (smac_index >= 0) { 1892 smac_info->candidate_smac_index = smac_index; 1893 smac_info->candidate_smac = smac; 1894 smac_info->candidate_smac_port = port; 1895 } else { 1896 return -EINVAL; 1897 } 1898 } else { 1899 smac_index = smac_info->smac_index; 1900 } 1901 memcpy(path->dmac, ah->roce.dmac, 6); 1902 path->ackto = MLX4_IB_LINK_TYPE_ETH; 1903 /* put MAC table smac index for IBoE */ 1904 path->grh_mylmc = (u8) (smac_index) | 0x80; 1905 } else { 1906 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | 1907 ((port - 1) << 6) | ((rdma_ah_get_sl(ah) & 0xf) << 2); 1908 } 1909 1910 return 0; 1911 } 1912 1913 static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_qp_attr *qp, 1914 enum ib_qp_attr_mask qp_attr_mask, 1915 struct mlx4_ib_qp *mqp, 1916 struct mlx4_qp_path *path, u8 port, 1917 u16 vlan_id, u8 *smac) 1918 { 1919 return _mlx4_set_path(dev, &qp->ah_attr, 1920 mlx4_mac_to_u64(smac), 1921 vlan_id, 1922 path, &mqp->pri, port); 1923 } 1924 1925 static int mlx4_set_alt_path(struct mlx4_ib_dev *dev, 1926 const struct ib_qp_attr *qp, 1927 enum ib_qp_attr_mask qp_attr_mask, 1928 struct mlx4_ib_qp *mqp, 1929 struct mlx4_qp_path *path, u8 port) 1930 { 1931 return _mlx4_set_path(dev, &qp->alt_ah_attr, 1932 0, 1933 0xffff, 1934 path, &mqp->alt, port); 1935 } 1936 1937 static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 1938 { 1939 struct mlx4_ib_gid_entry *ge, *tmp; 1940 1941 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) { 1942 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) { 1943 ge->added = 1; 1944 ge->port = qp->port; 1945 } 1946 } 1947 } 1948 1949 static int handle_eth_ud_smac_index(struct mlx4_ib_dev *dev, 1950 struct mlx4_ib_qp *qp, 1951 struct mlx4_qp_context *context) 1952 { 1953 u64 u64_mac; 1954 int smac_index; 1955 1956 u64_mac = atomic64_read(&dev->iboe.mac[qp->port - 1]); 1957 1958 context->pri_path.sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | ((qp->port - 1) << 6); 1959 if (!qp->pri.smac && !qp->pri.smac_port) { 1960 smac_index = mlx4_register_mac(dev->dev, qp->port, u64_mac); 1961 if (smac_index >= 0) { 1962 qp->pri.candidate_smac_index = smac_index; 1963 qp->pri.candidate_smac = u64_mac; 1964 qp->pri.candidate_smac_port = qp->port; 1965 context->pri_path.grh_mylmc = 0x80 | (u8) smac_index; 1966 } else { 1967 return -ENOENT; 1968 } 1969 } 1970 return 0; 1971 } 1972 1973 static int create_qp_lb_counter(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 1974 { 1975 struct counter_index *new_counter_index; 1976 int err; 1977 u32 tmp_idx; 1978 1979 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) != 1980 IB_LINK_LAYER_ETHERNET || 1981 !(qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) || 1982 !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_LB_SRC_CHK)) 1983 return 0; 1984 1985 err = mlx4_counter_alloc(dev->dev, &tmp_idx, MLX4_RES_USAGE_DRIVER); 1986 if (err) 1987 return err; 1988 1989 new_counter_index = kmalloc(sizeof(*new_counter_index), GFP_KERNEL); 1990 if (!new_counter_index) { 1991 mlx4_counter_free(dev->dev, tmp_idx); 1992 return -ENOMEM; 1993 } 1994 1995 new_counter_index->index = tmp_idx; 1996 new_counter_index->allocated = 1; 1997 qp->counter_index = new_counter_index; 1998 1999 mutex_lock(&dev->counters_table[qp->port - 1].mutex); 2000 list_add_tail(&new_counter_index->list, 2001 &dev->counters_table[qp->port - 1].counters_list); 2002 mutex_unlock(&dev->counters_table[qp->port - 1].mutex); 2003 2004 return 0; 2005 } 2006 2007 enum { 2008 MLX4_QPC_ROCE_MODE_1 = 0, 2009 MLX4_QPC_ROCE_MODE_2 = 2, 2010 MLX4_QPC_ROCE_MODE_UNDEFINED = 0xff 2011 }; 2012 2013 static u8 gid_type_to_qpc(enum ib_gid_type gid_type) 2014 { 2015 switch (gid_type) { 2016 case IB_GID_TYPE_ROCE: 2017 return MLX4_QPC_ROCE_MODE_1; 2018 case IB_GID_TYPE_ROCE_UDP_ENCAP: 2019 return MLX4_QPC_ROCE_MODE_2; 2020 default: 2021 return MLX4_QPC_ROCE_MODE_UNDEFINED; 2022 } 2023 } 2024 2025 /* 2026 * Go over all RSS QP's childes (WQs) and apply their HW state according to 2027 * their logic state if the RSS QP is the first RSS QP associated for the WQ. 2028 */ 2029 static int bringup_rss_rwqs(struct ib_rwq_ind_table *ind_tbl, u8 port_num, 2030 struct ib_udata *udata) 2031 { 2032 int err = 0; 2033 int i; 2034 2035 for (i = 0; i < (1 << ind_tbl->log_ind_tbl_size); i++) { 2036 struct ib_wq *ibwq = ind_tbl->ind_tbl[i]; 2037 struct mlx4_ib_qp *wq = to_mqp((struct ib_qp *)ibwq); 2038 2039 mutex_lock(&wq->mutex); 2040 2041 /* Mlx4_ib restrictions: 2042 * WQ's is associated to a port according to the RSS QP it is 2043 * associates to. 2044 * In case the WQ is associated to a different port by another 2045 * RSS QP, return a failure. 2046 */ 2047 if ((wq->rss_usecnt > 0) && (wq->port != port_num)) { 2048 err = -EINVAL; 2049 mutex_unlock(&wq->mutex); 2050 break; 2051 } 2052 wq->port = port_num; 2053 if ((wq->rss_usecnt == 0) && (ibwq->state == IB_WQS_RDY)) { 2054 err = _mlx4_ib_modify_wq(ibwq, IB_WQS_RDY, udata); 2055 if (err) { 2056 mutex_unlock(&wq->mutex); 2057 break; 2058 } 2059 } 2060 wq->rss_usecnt++; 2061 2062 mutex_unlock(&wq->mutex); 2063 } 2064 2065 if (i && err) { 2066 int j; 2067 2068 for (j = (i - 1); j >= 0; j--) { 2069 struct ib_wq *ibwq = ind_tbl->ind_tbl[j]; 2070 struct mlx4_ib_qp *wq = to_mqp((struct ib_qp *)ibwq); 2071 2072 mutex_lock(&wq->mutex); 2073 2074 if ((wq->rss_usecnt == 1) && 2075 (ibwq->state == IB_WQS_RDY)) 2076 if (_mlx4_ib_modify_wq(ibwq, IB_WQS_RESET, 2077 udata)) 2078 pr_warn("failed to reverse WQN=0x%06x\n", 2079 ibwq->wq_num); 2080 wq->rss_usecnt--; 2081 2082 mutex_unlock(&wq->mutex); 2083 } 2084 } 2085 2086 return err; 2087 } 2088 2089 static void bring_down_rss_rwqs(struct ib_rwq_ind_table *ind_tbl, 2090 struct ib_udata *udata) 2091 { 2092 int i; 2093 2094 for (i = 0; i < (1 << ind_tbl->log_ind_tbl_size); i++) { 2095 struct ib_wq *ibwq = ind_tbl->ind_tbl[i]; 2096 struct mlx4_ib_qp *wq = to_mqp((struct ib_qp *)ibwq); 2097 2098 mutex_lock(&wq->mutex); 2099 2100 if ((wq->rss_usecnt == 1) && (ibwq->state == IB_WQS_RDY)) 2101 if (_mlx4_ib_modify_wq(ibwq, IB_WQS_RESET, udata)) 2102 pr_warn("failed to reverse WQN=%x\n", 2103 ibwq->wq_num); 2104 wq->rss_usecnt--; 2105 2106 mutex_unlock(&wq->mutex); 2107 } 2108 } 2109 2110 static void fill_qp_rss_context(struct mlx4_qp_context *context, 2111 struct mlx4_ib_qp *qp) 2112 { 2113 struct mlx4_rss_context *rss_context; 2114 2115 rss_context = (void *)context + offsetof(struct mlx4_qp_context, 2116 pri_path) + MLX4_RSS_OFFSET_IN_QPC_PRI_PATH; 2117 2118 rss_context->base_qpn = cpu_to_be32(qp->rss_ctx->base_qpn_tbl_sz); 2119 rss_context->default_qpn = 2120 cpu_to_be32(qp->rss_ctx->base_qpn_tbl_sz & 0xffffff); 2121 if (qp->rss_ctx->flags & (MLX4_RSS_UDP_IPV4 | MLX4_RSS_UDP_IPV6)) 2122 rss_context->base_qpn_udp = rss_context->default_qpn; 2123 rss_context->flags = qp->rss_ctx->flags; 2124 /* Currently support just toeplitz */ 2125 rss_context->hash_fn = MLX4_RSS_HASH_TOP; 2126 2127 memcpy(rss_context->rss_key, qp->rss_ctx->rss_key, 2128 MLX4_EN_RSS_KEY_SIZE); 2129 } 2130 2131 static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type, 2132 const struct ib_qp_attr *attr, int attr_mask, 2133 enum ib_qp_state cur_state, 2134 enum ib_qp_state new_state, 2135 struct ib_udata *udata) 2136 { 2137 struct ib_srq *ibsrq; 2138 const struct ib_gid_attr *gid_attr = NULL; 2139 struct ib_rwq_ind_table *rwq_ind_tbl; 2140 enum ib_qp_type qp_type; 2141 struct mlx4_ib_dev *dev; 2142 struct mlx4_ib_qp *qp; 2143 struct mlx4_ib_pd *pd; 2144 struct mlx4_ib_cq *send_cq, *recv_cq; 2145 struct mlx4_ib_ucontext *ucontext = rdma_udata_to_drv_context( 2146 udata, struct mlx4_ib_ucontext, ibucontext); 2147 struct mlx4_qp_context *context; 2148 enum mlx4_qp_optpar optpar = 0; 2149 int sqd_event; 2150 int steer_qp = 0; 2151 int err = -EINVAL; 2152 int counter_index; 2153 2154 if (src_type == MLX4_IB_RWQ_SRC) { 2155 struct ib_wq *ibwq; 2156 2157 ibwq = (struct ib_wq *)src; 2158 ibsrq = NULL; 2159 rwq_ind_tbl = NULL; 2160 qp_type = IB_QPT_RAW_PACKET; 2161 qp = to_mqp((struct ib_qp *)ibwq); 2162 dev = to_mdev(ibwq->device); 2163 pd = to_mpd(ibwq->pd); 2164 } else { 2165 struct ib_qp *ibqp; 2166 2167 ibqp = (struct ib_qp *)src; 2168 ibsrq = ibqp->srq; 2169 rwq_ind_tbl = ibqp->rwq_ind_tbl; 2170 qp_type = ibqp->qp_type; 2171 qp = to_mqp(ibqp); 2172 dev = to_mdev(ibqp->device); 2173 pd = get_pd(qp); 2174 } 2175 2176 /* APM is not supported under RoCE */ 2177 if (attr_mask & IB_QP_ALT_PATH && 2178 rdma_port_get_link_layer(&dev->ib_dev, qp->port) == 2179 IB_LINK_LAYER_ETHERNET) 2180 return -ENOTSUPP; 2181 2182 context = kzalloc(sizeof *context, GFP_KERNEL); 2183 if (!context) 2184 return -ENOMEM; 2185 2186 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) | 2187 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16)); 2188 2189 if (!(attr_mask & IB_QP_PATH_MIG_STATE)) 2190 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); 2191 else { 2192 optpar |= MLX4_QP_OPTPAR_PM_STATE; 2193 switch (attr->path_mig_state) { 2194 case IB_MIG_MIGRATED: 2195 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); 2196 break; 2197 case IB_MIG_REARM: 2198 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11); 2199 break; 2200 case IB_MIG_ARMED: 2201 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11); 2202 break; 2203 } 2204 } 2205 2206 if (qp->inl_recv_sz) 2207 context->param3 |= cpu_to_be32(1 << 25); 2208 2209 if (qp->flags & MLX4_IB_QP_SCATTER_FCS) 2210 context->param3 |= cpu_to_be32(1 << 29); 2211 2212 if (qp_type == IB_QPT_GSI || qp_type == IB_QPT_SMI) 2213 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11; 2214 else if (qp_type == IB_QPT_RAW_PACKET) 2215 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX; 2216 else if (qp_type == IB_QPT_UD) { 2217 if (qp->flags & MLX4_IB_QP_LSO) 2218 context->mtu_msgmax = (IB_MTU_4096 << 5) | 2219 ilog2(dev->dev->caps.max_gso_sz); 2220 else 2221 context->mtu_msgmax = (IB_MTU_4096 << 5) | 13; 2222 } else if (attr_mask & IB_QP_PATH_MTU) { 2223 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) { 2224 pr_err("path MTU (%u) is invalid\n", 2225 attr->path_mtu); 2226 goto out; 2227 } 2228 context->mtu_msgmax = (attr->path_mtu << 5) | 2229 ilog2(dev->dev->caps.max_msg_sz); 2230 } 2231 2232 if (!rwq_ind_tbl) { /* PRM RSS receive side should be left zeros */ 2233 if (qp->rq.wqe_cnt) 2234 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3; 2235 context->rq_size_stride |= qp->rq.wqe_shift - 4; 2236 } 2237 2238 if (qp->sq.wqe_cnt) 2239 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3; 2240 context->sq_size_stride |= qp->sq.wqe_shift - 4; 2241 2242 if (new_state == IB_QPS_RESET && qp->counter_index) 2243 mlx4_ib_free_qp_counter(dev, qp); 2244 2245 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) { 2246 context->sq_size_stride |= !!qp->sq_no_prefetch << 7; 2247 context->xrcd = cpu_to_be32((u32) qp->xrcdn); 2248 if (qp_type == IB_QPT_RAW_PACKET) 2249 context->param3 |= cpu_to_be32(1 << 30); 2250 } 2251 2252 if (ucontext) 2253 context->usr_page = cpu_to_be32( 2254 mlx4_to_hw_uar_index(dev->dev, ucontext->uar.index)); 2255 else 2256 context->usr_page = cpu_to_be32( 2257 mlx4_to_hw_uar_index(dev->dev, dev->priv_uar.index)); 2258 2259 if (attr_mask & IB_QP_DEST_QPN) 2260 context->remote_qpn = cpu_to_be32(attr->dest_qp_num); 2261 2262 if (attr_mask & IB_QP_PORT) { 2263 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD && 2264 !(attr_mask & IB_QP_AV)) { 2265 mlx4_set_sched(&context->pri_path, attr->port_num); 2266 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE; 2267 } 2268 } 2269 2270 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) { 2271 err = create_qp_lb_counter(dev, qp); 2272 if (err) 2273 goto out; 2274 2275 counter_index = 2276 dev->counters_table[qp->port - 1].default_counter; 2277 if (qp->counter_index) 2278 counter_index = qp->counter_index->index; 2279 2280 if (counter_index != -1) { 2281 context->pri_path.counter_index = counter_index; 2282 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX; 2283 if (qp->counter_index) { 2284 context->pri_path.fl |= 2285 MLX4_FL_ETH_SRC_CHECK_MC_LB; 2286 context->pri_path.vlan_control |= 2287 MLX4_CTRL_ETH_SRC_CHECK_IF_COUNTER; 2288 } 2289 } else 2290 context->pri_path.counter_index = 2291 MLX4_SINK_COUNTER_INDEX(dev->dev); 2292 2293 if (qp->flags & MLX4_IB_QP_NETIF) { 2294 mlx4_ib_steer_qp_reg(dev, qp, 1); 2295 steer_qp = 1; 2296 } 2297 2298 if (qp_type == IB_QPT_GSI) { 2299 enum ib_gid_type gid_type = qp->flags & MLX4_IB_ROCE_V2_GSI_QP ? 2300 IB_GID_TYPE_ROCE_UDP_ENCAP : IB_GID_TYPE_ROCE; 2301 u8 qpc_roce_mode = gid_type_to_qpc(gid_type); 2302 2303 context->rlkey_roce_mode |= (qpc_roce_mode << 6); 2304 } 2305 } 2306 2307 if (attr_mask & IB_QP_PKEY_INDEX) { 2308 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) 2309 context->pri_path.disable_pkey_check = 0x40; 2310 context->pri_path.pkey_index = attr->pkey_index; 2311 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX; 2312 } 2313 2314 if (attr_mask & IB_QP_AV) { 2315 u8 port_num = mlx4_is_bonded(dev->dev) ? 1 : 2316 attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 2317 u16 vlan = 0xffff; 2318 u8 smac[ETH_ALEN]; 2319 int is_eth = 2320 rdma_cap_eth_ah(&dev->ib_dev, port_num) && 2321 rdma_ah_get_ah_flags(&attr->ah_attr) & IB_AH_GRH; 2322 2323 if (is_eth) { 2324 gid_attr = attr->ah_attr.grh.sgid_attr; 2325 err = rdma_read_gid_l2_fields(gid_attr, &vlan, 2326 &smac[0]); 2327 if (err) 2328 goto out; 2329 } 2330 2331 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path, 2332 port_num, vlan, smac)) 2333 goto out; 2334 2335 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH | 2336 MLX4_QP_OPTPAR_SCHED_QUEUE); 2337 2338 if (is_eth && 2339 (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR)) { 2340 u8 qpc_roce_mode = gid_type_to_qpc(gid_attr->gid_type); 2341 2342 if (qpc_roce_mode == MLX4_QPC_ROCE_MODE_UNDEFINED) { 2343 err = -EINVAL; 2344 goto out; 2345 } 2346 context->rlkey_roce_mode |= (qpc_roce_mode << 6); 2347 } 2348 2349 } 2350 2351 if (attr_mask & IB_QP_TIMEOUT) { 2352 context->pri_path.ackto |= attr->timeout << 3; 2353 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT; 2354 } 2355 2356 if (attr_mask & IB_QP_ALT_PATH) { 2357 if (attr->alt_port_num == 0 || 2358 attr->alt_port_num > dev->dev->caps.num_ports) 2359 goto out; 2360 2361 if (attr->alt_pkey_index >= 2362 dev->dev->caps.pkey_table_len[attr->alt_port_num]) 2363 goto out; 2364 2365 if (mlx4_set_alt_path(dev, attr, attr_mask, qp, 2366 &context->alt_path, 2367 attr->alt_port_num)) 2368 goto out; 2369 2370 context->alt_path.pkey_index = attr->alt_pkey_index; 2371 context->alt_path.ackto = attr->alt_timeout << 3; 2372 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH; 2373 } 2374 2375 context->pd = cpu_to_be32(pd->pdn); 2376 2377 if (!rwq_ind_tbl) { 2378 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28); 2379 get_cqs(qp, src_type, &send_cq, &recv_cq); 2380 } else { /* Set dummy CQs to be compatible with HV and PRM */ 2381 send_cq = to_mcq(rwq_ind_tbl->ind_tbl[0]->cq); 2382 recv_cq = send_cq; 2383 } 2384 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn); 2385 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn); 2386 2387 /* Set "fast registration enabled" for all kernel QPs */ 2388 if (!ucontext) 2389 context->params1 |= cpu_to_be32(1 << 11); 2390 2391 if (attr_mask & IB_QP_RNR_RETRY) { 2392 context->params1 |= cpu_to_be32(attr->rnr_retry << 13); 2393 optpar |= MLX4_QP_OPTPAR_RNR_RETRY; 2394 } 2395 2396 if (attr_mask & IB_QP_RETRY_CNT) { 2397 context->params1 |= cpu_to_be32(attr->retry_cnt << 16); 2398 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT; 2399 } 2400 2401 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) { 2402 if (attr->max_rd_atomic) 2403 context->params1 |= 2404 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21); 2405 optpar |= MLX4_QP_OPTPAR_SRA_MAX; 2406 } 2407 2408 if (attr_mask & IB_QP_SQ_PSN) 2409 context->next_send_psn = cpu_to_be32(attr->sq_psn); 2410 2411 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) { 2412 if (attr->max_dest_rd_atomic) 2413 context->params2 |= 2414 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21); 2415 optpar |= MLX4_QP_OPTPAR_RRA_MAX; 2416 } 2417 2418 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) { 2419 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask); 2420 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE; 2421 } 2422 2423 if (ibsrq) 2424 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC); 2425 2426 if (attr_mask & IB_QP_MIN_RNR_TIMER) { 2427 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24); 2428 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT; 2429 } 2430 if (attr_mask & IB_QP_RQ_PSN) 2431 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn); 2432 2433 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */ 2434 if (attr_mask & IB_QP_QKEY) { 2435 if (qp->mlx4_ib_qp_type & 2436 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) 2437 context->qkey = cpu_to_be32(IB_QP_SET_QKEY); 2438 else { 2439 if (mlx4_is_mfunc(dev->dev) && 2440 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) && 2441 (attr->qkey & MLX4_RESERVED_QKEY_MASK) == 2442 MLX4_RESERVED_QKEY_BASE) { 2443 pr_err("Cannot use reserved QKEY" 2444 " 0x%x (range 0xffff0000..0xffffffff" 2445 " is reserved)\n", attr->qkey); 2446 err = -EINVAL; 2447 goto out; 2448 } 2449 context->qkey = cpu_to_be32(attr->qkey); 2450 } 2451 optpar |= MLX4_QP_OPTPAR_Q_KEY; 2452 } 2453 2454 if (ibsrq) 2455 context->srqn = cpu_to_be32(1 << 24 | 2456 to_msrq(ibsrq)->msrq.srqn); 2457 2458 if (qp->rq.wqe_cnt && 2459 cur_state == IB_QPS_RESET && 2460 new_state == IB_QPS_INIT) 2461 context->db_rec_addr = cpu_to_be64(qp->db.dma); 2462 2463 if (cur_state == IB_QPS_INIT && 2464 new_state == IB_QPS_RTR && 2465 (qp_type == IB_QPT_GSI || qp_type == IB_QPT_SMI || 2466 qp_type == IB_QPT_UD || qp_type == IB_QPT_RAW_PACKET)) { 2467 context->pri_path.sched_queue = (qp->port - 1) << 6; 2468 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI || 2469 qp->mlx4_ib_qp_type & 2470 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) { 2471 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE; 2472 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI) 2473 context->pri_path.fl = 0x80; 2474 } else { 2475 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) 2476 context->pri_path.fl = 0x80; 2477 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE; 2478 } 2479 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) == 2480 IB_LINK_LAYER_ETHERNET) { 2481 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI || 2482 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) 2483 context->pri_path.feup = 1 << 7; /* don't fsm */ 2484 /* handle smac_index */ 2485 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD || 2486 qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI || 2487 qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) { 2488 err = handle_eth_ud_smac_index(dev, qp, context); 2489 if (err) { 2490 err = -EINVAL; 2491 goto out; 2492 } 2493 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI) 2494 dev->qp1_proxy[qp->port - 1] = qp; 2495 } 2496 } 2497 } 2498 2499 if (qp_type == IB_QPT_RAW_PACKET) { 2500 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) | 2501 MLX4_IB_LINK_TYPE_ETH; 2502 if (dev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) { 2503 /* set QP to receive both tunneled & non-tunneled packets */ 2504 if (!rwq_ind_tbl) 2505 context->srqn = cpu_to_be32(7 << 28); 2506 } 2507 } 2508 2509 if (qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) { 2510 int is_eth = rdma_port_get_link_layer( 2511 &dev->ib_dev, qp->port) == 2512 IB_LINK_LAYER_ETHERNET; 2513 if (is_eth) { 2514 context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH; 2515 optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH; 2516 } 2517 } 2518 2519 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD && 2520 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify) 2521 sqd_event = 1; 2522 else 2523 sqd_event = 0; 2524 2525 if (!ucontext && 2526 cur_state == IB_QPS_RESET && 2527 new_state == IB_QPS_INIT) 2528 context->rlkey_roce_mode |= (1 << 4); 2529 2530 /* 2531 * Before passing a kernel QP to the HW, make sure that the 2532 * ownership bits of the send queue are set and the SQ 2533 * headroom is stamped so that the hardware doesn't start 2534 * processing stale work requests. 2535 */ 2536 if (!ucontext && 2537 cur_state == IB_QPS_RESET && 2538 new_state == IB_QPS_INIT) { 2539 struct mlx4_wqe_ctrl_seg *ctrl; 2540 int i; 2541 2542 for (i = 0; i < qp->sq.wqe_cnt; ++i) { 2543 ctrl = get_send_wqe(qp, i); 2544 ctrl->owner_opcode = cpu_to_be32(1 << 31); 2545 ctrl->qpn_vlan.fence_size = 2546 1 << (qp->sq.wqe_shift - 4); 2547 stamp_send_wqe(qp, i); 2548 } 2549 } 2550 2551 if (rwq_ind_tbl && 2552 cur_state == IB_QPS_RESET && 2553 new_state == IB_QPS_INIT) { 2554 fill_qp_rss_context(context, qp); 2555 context->flags |= cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET); 2556 } 2557 2558 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state), 2559 to_mlx4_state(new_state), context, optpar, 2560 sqd_event, &qp->mqp); 2561 if (err) 2562 goto out; 2563 2564 qp->state = new_state; 2565 2566 if (attr_mask & IB_QP_ACCESS_FLAGS) 2567 qp->atomic_rd_en = attr->qp_access_flags; 2568 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 2569 qp->resp_depth = attr->max_dest_rd_atomic; 2570 if (attr_mask & IB_QP_PORT) { 2571 qp->port = attr->port_num; 2572 update_mcg_macs(dev, qp); 2573 } 2574 if (attr_mask & IB_QP_ALT_PATH) 2575 qp->alt_port = attr->alt_port_num; 2576 2577 if (is_sqp(dev, qp)) 2578 store_sqp_attrs(to_msqp(qp), attr, attr_mask); 2579 2580 /* 2581 * If we moved QP0 to RTR, bring the IB link up; if we moved 2582 * QP0 to RESET or ERROR, bring the link back down. 2583 */ 2584 if (is_qp0(dev, qp)) { 2585 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR) 2586 if (mlx4_INIT_PORT(dev->dev, qp->port)) 2587 pr_warn("INIT_PORT failed for port %d\n", 2588 qp->port); 2589 2590 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR && 2591 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR)) 2592 mlx4_CLOSE_PORT(dev->dev, qp->port); 2593 } 2594 2595 /* 2596 * If we moved a kernel QP to RESET, clean up all old CQ 2597 * entries and reinitialize the QP. 2598 */ 2599 if (new_state == IB_QPS_RESET) { 2600 if (!ucontext) { 2601 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn, 2602 ibsrq ? to_msrq(ibsrq) : NULL); 2603 if (send_cq != recv_cq) 2604 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); 2605 2606 qp->rq.head = 0; 2607 qp->rq.tail = 0; 2608 qp->sq.head = 0; 2609 qp->sq.tail = 0; 2610 qp->sq_next_wqe = 0; 2611 if (qp->rq.wqe_cnt) 2612 *qp->db.db = 0; 2613 2614 if (qp->flags & MLX4_IB_QP_NETIF) 2615 mlx4_ib_steer_qp_reg(dev, qp, 0); 2616 } 2617 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) { 2618 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 2619 qp->pri.smac = 0; 2620 qp->pri.smac_port = 0; 2621 } 2622 if (qp->alt.smac) { 2623 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 2624 qp->alt.smac = 0; 2625 } 2626 if (qp->pri.vid < 0x1000) { 2627 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid); 2628 qp->pri.vid = 0xFFFF; 2629 qp->pri.candidate_vid = 0xFFFF; 2630 qp->pri.update_vid = 0; 2631 } 2632 2633 if (qp->alt.vid < 0x1000) { 2634 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid); 2635 qp->alt.vid = 0xFFFF; 2636 qp->alt.candidate_vid = 0xFFFF; 2637 qp->alt.update_vid = 0; 2638 } 2639 } 2640 out: 2641 if (err && qp->counter_index) 2642 mlx4_ib_free_qp_counter(dev, qp); 2643 if (err && steer_qp) 2644 mlx4_ib_steer_qp_reg(dev, qp, 0); 2645 kfree(context); 2646 if (qp->pri.candidate_smac || 2647 (!qp->pri.candidate_smac && qp->pri.candidate_smac_port)) { 2648 if (err) { 2649 mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac); 2650 } else { 2651 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) 2652 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 2653 qp->pri.smac = qp->pri.candidate_smac; 2654 qp->pri.smac_index = qp->pri.candidate_smac_index; 2655 qp->pri.smac_port = qp->pri.candidate_smac_port; 2656 } 2657 qp->pri.candidate_smac = 0; 2658 qp->pri.candidate_smac_index = 0; 2659 qp->pri.candidate_smac_port = 0; 2660 } 2661 if (qp->alt.candidate_smac) { 2662 if (err) { 2663 mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac); 2664 } else { 2665 if (qp->alt.smac) 2666 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 2667 qp->alt.smac = qp->alt.candidate_smac; 2668 qp->alt.smac_index = qp->alt.candidate_smac_index; 2669 qp->alt.smac_port = qp->alt.candidate_smac_port; 2670 } 2671 qp->alt.candidate_smac = 0; 2672 qp->alt.candidate_smac_index = 0; 2673 qp->alt.candidate_smac_port = 0; 2674 } 2675 2676 if (qp->pri.update_vid) { 2677 if (err) { 2678 if (qp->pri.candidate_vid < 0x1000) 2679 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port, 2680 qp->pri.candidate_vid); 2681 } else { 2682 if (qp->pri.vid < 0x1000) 2683 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, 2684 qp->pri.vid); 2685 qp->pri.vid = qp->pri.candidate_vid; 2686 qp->pri.vlan_port = qp->pri.candidate_vlan_port; 2687 qp->pri.vlan_index = qp->pri.candidate_vlan_index; 2688 } 2689 qp->pri.candidate_vid = 0xFFFF; 2690 qp->pri.update_vid = 0; 2691 } 2692 2693 if (qp->alt.update_vid) { 2694 if (err) { 2695 if (qp->alt.candidate_vid < 0x1000) 2696 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port, 2697 qp->alt.candidate_vid); 2698 } else { 2699 if (qp->alt.vid < 0x1000) 2700 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, 2701 qp->alt.vid); 2702 qp->alt.vid = qp->alt.candidate_vid; 2703 qp->alt.vlan_port = qp->alt.candidate_vlan_port; 2704 qp->alt.vlan_index = qp->alt.candidate_vlan_index; 2705 } 2706 qp->alt.candidate_vid = 0xFFFF; 2707 qp->alt.update_vid = 0; 2708 } 2709 2710 return err; 2711 } 2712 2713 enum { 2714 MLX4_IB_MODIFY_QP_RSS_SUP_ATTR_MSK = (IB_QP_STATE | 2715 IB_QP_PORT), 2716 }; 2717 2718 static int _mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 2719 int attr_mask, struct ib_udata *udata) 2720 { 2721 struct mlx4_ib_dev *dev = to_mdev(ibqp->device); 2722 struct mlx4_ib_qp *qp = to_mqp(ibqp); 2723 enum ib_qp_state cur_state, new_state; 2724 int err = -EINVAL; 2725 mutex_lock(&qp->mutex); 2726 2727 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state; 2728 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; 2729 2730 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, 2731 attr_mask)) { 2732 pr_debug("qpn 0x%x: invalid attribute mask specified " 2733 "for transition %d to %d. qp_type %d," 2734 " attr_mask 0x%x\n", 2735 ibqp->qp_num, cur_state, new_state, 2736 ibqp->qp_type, attr_mask); 2737 goto out; 2738 } 2739 2740 if (ibqp->rwq_ind_tbl) { 2741 if (!(((cur_state == IB_QPS_RESET) && 2742 (new_state == IB_QPS_INIT)) || 2743 ((cur_state == IB_QPS_INIT) && 2744 (new_state == IB_QPS_RTR)))) { 2745 pr_debug("qpn 0x%x: RSS QP unsupported transition %d to %d\n", 2746 ibqp->qp_num, cur_state, new_state); 2747 2748 err = -EOPNOTSUPP; 2749 goto out; 2750 } 2751 2752 if (attr_mask & ~MLX4_IB_MODIFY_QP_RSS_SUP_ATTR_MSK) { 2753 pr_debug("qpn 0x%x: RSS QP unsupported attribute mask 0x%x for transition %d to %d\n", 2754 ibqp->qp_num, attr_mask, cur_state, new_state); 2755 2756 err = -EOPNOTSUPP; 2757 goto out; 2758 } 2759 } 2760 2761 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) { 2762 if ((cur_state == IB_QPS_RESET) && (new_state == IB_QPS_INIT)) { 2763 if ((ibqp->qp_type == IB_QPT_RC) || 2764 (ibqp->qp_type == IB_QPT_UD) || 2765 (ibqp->qp_type == IB_QPT_UC) || 2766 (ibqp->qp_type == IB_QPT_RAW_PACKET) || 2767 (ibqp->qp_type == IB_QPT_XRC_INI)) { 2768 attr->port_num = mlx4_ib_bond_next_port(dev); 2769 } 2770 } else { 2771 /* no sense in changing port_num 2772 * when ports are bonded */ 2773 attr_mask &= ~IB_QP_PORT; 2774 } 2775 } 2776 2777 if ((attr_mask & IB_QP_PORT) && 2778 (attr->port_num == 0 || attr->port_num > dev->num_ports)) { 2779 pr_debug("qpn 0x%x: invalid port number (%d) specified " 2780 "for transition %d to %d. qp_type %d\n", 2781 ibqp->qp_num, attr->port_num, cur_state, 2782 new_state, ibqp->qp_type); 2783 goto out; 2784 } 2785 2786 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) && 2787 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) != 2788 IB_LINK_LAYER_ETHERNET)) 2789 goto out; 2790 2791 if (attr_mask & IB_QP_PKEY_INDEX) { 2792 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 2793 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) { 2794 pr_debug("qpn 0x%x: invalid pkey index (%d) specified " 2795 "for transition %d to %d. qp_type %d\n", 2796 ibqp->qp_num, attr->pkey_index, cur_state, 2797 new_state, ibqp->qp_type); 2798 goto out; 2799 } 2800 } 2801 2802 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC && 2803 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) { 2804 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. " 2805 "Transition %d to %d. qp_type %d\n", 2806 ibqp->qp_num, attr->max_rd_atomic, cur_state, 2807 new_state, ibqp->qp_type); 2808 goto out; 2809 } 2810 2811 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC && 2812 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) { 2813 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. " 2814 "Transition %d to %d. qp_type %d\n", 2815 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state, 2816 new_state, ibqp->qp_type); 2817 goto out; 2818 } 2819 2820 if (cur_state == new_state && cur_state == IB_QPS_RESET) { 2821 err = 0; 2822 goto out; 2823 } 2824 2825 if (ibqp->rwq_ind_tbl && (new_state == IB_QPS_INIT)) { 2826 err = bringup_rss_rwqs(ibqp->rwq_ind_tbl, attr->port_num, 2827 udata); 2828 if (err) 2829 goto out; 2830 } 2831 2832 err = __mlx4_ib_modify_qp(ibqp, MLX4_IB_QP_SRC, attr, attr_mask, 2833 cur_state, new_state, udata); 2834 2835 if (ibqp->rwq_ind_tbl && err) 2836 bring_down_rss_rwqs(ibqp->rwq_ind_tbl, udata); 2837 2838 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) 2839 attr->port_num = 1; 2840 2841 out: 2842 mutex_unlock(&qp->mutex); 2843 return err; 2844 } 2845 2846 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 2847 int attr_mask, struct ib_udata *udata) 2848 { 2849 struct mlx4_ib_qp *mqp = to_mqp(ibqp); 2850 int ret; 2851 2852 ret = _mlx4_ib_modify_qp(ibqp, attr, attr_mask, udata); 2853 2854 if (mqp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) { 2855 struct mlx4_ib_sqp *sqp = to_msqp(mqp); 2856 int err = 0; 2857 2858 if (sqp->roce_v2_gsi) 2859 err = ib_modify_qp(sqp->roce_v2_gsi, attr, attr_mask); 2860 if (err) 2861 pr_err("Failed to modify GSI QP for RoCEv2 (%d)\n", 2862 err); 2863 } 2864 return ret; 2865 } 2866 2867 static int vf_get_qp0_qkey(struct mlx4_dev *dev, int qpn, u32 *qkey) 2868 { 2869 int i; 2870 for (i = 0; i < dev->caps.num_ports; i++) { 2871 if (qpn == dev->caps.spec_qps[i].qp0_proxy || 2872 qpn == dev->caps.spec_qps[i].qp0_tunnel) { 2873 *qkey = dev->caps.spec_qps[i].qp0_qkey; 2874 return 0; 2875 } 2876 } 2877 return -EINVAL; 2878 } 2879 2880 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp, 2881 const struct ib_ud_wr *wr, 2882 void *wqe, unsigned *mlx_seg_len) 2883 { 2884 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device); 2885 struct ib_device *ib_dev = &mdev->ib_dev; 2886 struct mlx4_wqe_mlx_seg *mlx = wqe; 2887 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx; 2888 struct mlx4_ib_ah *ah = to_mah(wr->ah); 2889 u16 pkey; 2890 u32 qkey; 2891 int send_size; 2892 int header_size; 2893 int spc; 2894 int i; 2895 2896 if (wr->wr.opcode != IB_WR_SEND) 2897 return -EINVAL; 2898 2899 send_size = 0; 2900 2901 for (i = 0; i < wr->wr.num_sge; ++i) 2902 send_size += wr->wr.sg_list[i].length; 2903 2904 /* for proxy-qp0 sends, need to add in size of tunnel header */ 2905 /* for tunnel-qp0 sends, tunnel header is already in s/g list */ 2906 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) 2907 send_size += sizeof (struct mlx4_ib_tunnel_header); 2908 2909 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, 0, 0, &sqp->ud_header); 2910 2911 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) { 2912 sqp->ud_header.lrh.service_level = 2913 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28; 2914 sqp->ud_header.lrh.destination_lid = 2915 cpu_to_be16(ah->av.ib.g_slid & 0x7f); 2916 sqp->ud_header.lrh.source_lid = 2917 cpu_to_be16(ah->av.ib.g_slid & 0x7f); 2918 } 2919 2920 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); 2921 2922 /* force loopback */ 2923 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR); 2924 mlx->rlid = sqp->ud_header.lrh.destination_lid; 2925 2926 sqp->ud_header.lrh.virtual_lane = 0; 2927 sqp->ud_header.bth.solicited_event = !!(wr->wr.send_flags & IB_SEND_SOLICITED); 2928 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey); 2929 sqp->ud_header.bth.pkey = cpu_to_be16(pkey); 2930 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER) 2931 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->remote_qpn); 2932 else 2933 sqp->ud_header.bth.destination_qpn = 2934 cpu_to_be32(mdev->dev->caps.spec_qps[sqp->qp.port - 1].qp0_tunnel); 2935 2936 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1)); 2937 if (mlx4_is_master(mdev->dev)) { 2938 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey)) 2939 return -EINVAL; 2940 } else { 2941 if (vf_get_qp0_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey)) 2942 return -EINVAL; 2943 } 2944 sqp->ud_header.deth.qkey = cpu_to_be32(qkey); 2945 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn); 2946 2947 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY; 2948 sqp->ud_header.immediate_present = 0; 2949 2950 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf); 2951 2952 /* 2953 * Inline data segments may not cross a 64 byte boundary. If 2954 * our UD header is bigger than the space available up to the 2955 * next 64 byte boundary in the WQE, use two inline data 2956 * segments to hold the UD header. 2957 */ 2958 spc = MLX4_INLINE_ALIGN - 2959 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1)); 2960 if (header_size <= spc) { 2961 inl->byte_count = cpu_to_be32(1 << 31 | header_size); 2962 memcpy(inl + 1, sqp->header_buf, header_size); 2963 i = 1; 2964 } else { 2965 inl->byte_count = cpu_to_be32(1 << 31 | spc); 2966 memcpy(inl + 1, sqp->header_buf, spc); 2967 2968 inl = (void *) (inl + 1) + spc; 2969 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc); 2970 /* 2971 * Need a barrier here to make sure all the data is 2972 * visible before the byte_count field is set. 2973 * Otherwise the HCA prefetcher could grab the 64-byte 2974 * chunk with this inline segment and get a valid (!= 2975 * 0xffffffff) byte count but stale data, and end up 2976 * generating a packet with bad headers. 2977 * 2978 * The first inline segment's byte_count field doesn't 2979 * need a barrier, because it comes after a 2980 * control/MLX segment and therefore is at an offset 2981 * of 16 mod 64. 2982 */ 2983 wmb(); 2984 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc)); 2985 i = 2; 2986 } 2987 2988 *mlx_seg_len = 2989 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16); 2990 return 0; 2991 } 2992 2993 static u8 sl_to_vl(struct mlx4_ib_dev *dev, u8 sl, int port_num) 2994 { 2995 union sl2vl_tbl_to_u64 tmp_vltab; 2996 u8 vl; 2997 2998 if (sl > 15) 2999 return 0xf; 3000 tmp_vltab.sl64 = atomic64_read(&dev->sl2vl[port_num - 1]); 3001 vl = tmp_vltab.sl8[sl >> 1]; 3002 if (sl & 1) 3003 vl &= 0x0f; 3004 else 3005 vl >>= 4; 3006 return vl; 3007 } 3008 3009 static int fill_gid_by_hw_index(struct mlx4_ib_dev *ibdev, u8 port_num, 3010 int index, union ib_gid *gid, 3011 enum ib_gid_type *gid_type) 3012 { 3013 struct mlx4_ib_iboe *iboe = &ibdev->iboe; 3014 struct mlx4_port_gid_table *port_gid_table; 3015 unsigned long flags; 3016 3017 port_gid_table = &iboe->gids[port_num - 1]; 3018 spin_lock_irqsave(&iboe->lock, flags); 3019 memcpy(gid, &port_gid_table->gids[index].gid, sizeof(*gid)); 3020 *gid_type = port_gid_table->gids[index].gid_type; 3021 spin_unlock_irqrestore(&iboe->lock, flags); 3022 if (rdma_is_zero_gid(gid)) 3023 return -ENOENT; 3024 3025 return 0; 3026 } 3027 3028 #define MLX4_ROCEV2_QP1_SPORT 0xC000 3029 static int build_mlx_header(struct mlx4_ib_sqp *sqp, const struct ib_ud_wr *wr, 3030 void *wqe, unsigned *mlx_seg_len) 3031 { 3032 struct ib_device *ib_dev = sqp->qp.ibqp.device; 3033 struct mlx4_ib_dev *ibdev = to_mdev(ib_dev); 3034 struct mlx4_wqe_mlx_seg *mlx = wqe; 3035 struct mlx4_wqe_ctrl_seg *ctrl = wqe; 3036 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx; 3037 struct mlx4_ib_ah *ah = to_mah(wr->ah); 3038 union ib_gid sgid; 3039 u16 pkey; 3040 int send_size; 3041 int header_size; 3042 int spc; 3043 int i; 3044 int err = 0; 3045 u16 vlan = 0xffff; 3046 bool is_eth; 3047 bool is_vlan = false; 3048 bool is_grh; 3049 bool is_udp = false; 3050 int ip_version = 0; 3051 3052 send_size = 0; 3053 for (i = 0; i < wr->wr.num_sge; ++i) 3054 send_size += wr->wr.sg_list[i].length; 3055 3056 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET; 3057 is_grh = mlx4_ib_ah_grh_present(ah); 3058 if (is_eth) { 3059 enum ib_gid_type gid_type; 3060 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) { 3061 /* When multi-function is enabled, the ib_core gid 3062 * indexes don't necessarily match the hw ones, so 3063 * we must use our own cache */ 3064 err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev, 3065 be32_to_cpu(ah->av.ib.port_pd) >> 24, 3066 ah->av.ib.gid_index, &sgid.raw[0]); 3067 if (err) 3068 return err; 3069 } else { 3070 err = fill_gid_by_hw_index(ibdev, sqp->qp.port, 3071 ah->av.ib.gid_index, 3072 &sgid, &gid_type); 3073 if (!err) { 3074 is_udp = gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP; 3075 if (is_udp) { 3076 if (ipv6_addr_v4mapped((struct in6_addr *)&sgid)) 3077 ip_version = 4; 3078 else 3079 ip_version = 6; 3080 is_grh = false; 3081 } 3082 } else { 3083 return err; 3084 } 3085 } 3086 if (ah->av.eth.vlan != cpu_to_be16(0xffff)) { 3087 vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff; 3088 is_vlan = 1; 3089 } 3090 } 3091 err = ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 3092 ip_version, is_udp, 0, &sqp->ud_header); 3093 if (err) 3094 return err; 3095 3096 if (!is_eth) { 3097 sqp->ud_header.lrh.service_level = 3098 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28; 3099 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid; 3100 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f); 3101 } 3102 3103 if (is_grh || (ip_version == 6)) { 3104 sqp->ud_header.grh.traffic_class = 3105 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff; 3106 sqp->ud_header.grh.flow_label = 3107 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff); 3108 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit; 3109 if (is_eth) { 3110 memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16); 3111 } else { 3112 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) { 3113 /* When multi-function is enabled, the ib_core gid 3114 * indexes don't necessarily match the hw ones, so 3115 * we must use our own cache 3116 */ 3117 sqp->ud_header.grh.source_gid.global.subnet_prefix = 3118 cpu_to_be64(atomic64_read(&(to_mdev(ib_dev)->sriov. 3119 demux[sqp->qp.port - 1]. 3120 subnet_prefix))); 3121 sqp->ud_header.grh.source_gid.global.interface_id = 3122 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1]. 3123 guid_cache[ah->av.ib.gid_index]; 3124 } else { 3125 sqp->ud_header.grh.source_gid = 3126 ah->ibah.sgid_attr->gid; 3127 } 3128 } 3129 memcpy(sqp->ud_header.grh.destination_gid.raw, 3130 ah->av.ib.dgid, 16); 3131 } 3132 3133 if (ip_version == 4) { 3134 sqp->ud_header.ip4.tos = 3135 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff; 3136 sqp->ud_header.ip4.id = 0; 3137 sqp->ud_header.ip4.frag_off = htons(IP_DF); 3138 sqp->ud_header.ip4.ttl = ah->av.eth.hop_limit; 3139 3140 memcpy(&sqp->ud_header.ip4.saddr, 3141 sgid.raw + 12, 4); 3142 memcpy(&sqp->ud_header.ip4.daddr, ah->av.ib.dgid + 12, 4); 3143 sqp->ud_header.ip4.check = ib_ud_ip4_csum(&sqp->ud_header); 3144 } 3145 3146 if (is_udp) { 3147 sqp->ud_header.udp.dport = htons(ROCE_V2_UDP_DPORT); 3148 sqp->ud_header.udp.sport = htons(MLX4_ROCEV2_QP1_SPORT); 3149 sqp->ud_header.udp.csum = 0; 3150 } 3151 3152 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); 3153 3154 if (!is_eth) { 3155 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) | 3156 (sqp->ud_header.lrh.destination_lid == 3157 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) | 3158 (sqp->ud_header.lrh.service_level << 8)); 3159 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000)) 3160 mlx->flags |= cpu_to_be32(0x1); /* force loopback */ 3161 mlx->rlid = sqp->ud_header.lrh.destination_lid; 3162 } 3163 3164 switch (wr->wr.opcode) { 3165 case IB_WR_SEND: 3166 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY; 3167 sqp->ud_header.immediate_present = 0; 3168 break; 3169 case IB_WR_SEND_WITH_IMM: 3170 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; 3171 sqp->ud_header.immediate_present = 1; 3172 sqp->ud_header.immediate_data = wr->wr.ex.imm_data; 3173 break; 3174 default: 3175 return -EINVAL; 3176 } 3177 3178 if (is_eth) { 3179 struct in6_addr in6; 3180 u16 ether_type; 3181 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13; 3182 3183 ether_type = (!is_udp) ? ETH_P_IBOE: 3184 (ip_version == 4 ? ETH_P_IP : ETH_P_IPV6); 3185 3186 mlx->sched_prio = cpu_to_be16(pcp); 3187 3188 ether_addr_copy(sqp->ud_header.eth.smac_h, ah->av.eth.s_mac); 3189 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6); 3190 memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2); 3191 memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4); 3192 memcpy(&in6, sgid.raw, sizeof(in6)); 3193 3194 3195 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6)) 3196 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK); 3197 if (!is_vlan) { 3198 sqp->ud_header.eth.type = cpu_to_be16(ether_type); 3199 } else { 3200 sqp->ud_header.vlan.type = cpu_to_be16(ether_type); 3201 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp); 3202 } 3203 } else { 3204 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 3205 sl_to_vl(to_mdev(ib_dev), 3206 sqp->ud_header.lrh.service_level, 3207 sqp->qp.port); 3208 if (sqp->qp.ibqp.qp_num && sqp->ud_header.lrh.virtual_lane == 15) 3209 return -EINVAL; 3210 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE) 3211 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE; 3212 } 3213 sqp->ud_header.bth.solicited_event = !!(wr->wr.send_flags & IB_SEND_SOLICITED); 3214 if (!sqp->qp.ibqp.qp_num) 3215 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey); 3216 else 3217 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->pkey_index, &pkey); 3218 sqp->ud_header.bth.pkey = cpu_to_be16(pkey); 3219 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->remote_qpn); 3220 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1)); 3221 sqp->ud_header.deth.qkey = cpu_to_be32(wr->remote_qkey & 0x80000000 ? 3222 sqp->qkey : wr->remote_qkey); 3223 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num); 3224 3225 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf); 3226 3227 if (0) { 3228 pr_err("built UD header of size %d:\n", header_size); 3229 for (i = 0; i < header_size / 4; ++i) { 3230 if (i % 8 == 0) 3231 pr_err(" [%02x] ", i * 4); 3232 pr_cont(" %08x", 3233 be32_to_cpu(((__be32 *) sqp->header_buf)[i])); 3234 if ((i + 1) % 8 == 0) 3235 pr_cont("\n"); 3236 } 3237 pr_err("\n"); 3238 } 3239 3240 /* 3241 * Inline data segments may not cross a 64 byte boundary. If 3242 * our UD header is bigger than the space available up to the 3243 * next 64 byte boundary in the WQE, use two inline data 3244 * segments to hold the UD header. 3245 */ 3246 spc = MLX4_INLINE_ALIGN - 3247 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1)); 3248 if (header_size <= spc) { 3249 inl->byte_count = cpu_to_be32(1 << 31 | header_size); 3250 memcpy(inl + 1, sqp->header_buf, header_size); 3251 i = 1; 3252 } else { 3253 inl->byte_count = cpu_to_be32(1 << 31 | spc); 3254 memcpy(inl + 1, sqp->header_buf, spc); 3255 3256 inl = (void *) (inl + 1) + spc; 3257 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc); 3258 /* 3259 * Need a barrier here to make sure all the data is 3260 * visible before the byte_count field is set. 3261 * Otherwise the HCA prefetcher could grab the 64-byte 3262 * chunk with this inline segment and get a valid (!= 3263 * 0xffffffff) byte count but stale data, and end up 3264 * generating a packet with bad headers. 3265 * 3266 * The first inline segment's byte_count field doesn't 3267 * need a barrier, because it comes after a 3268 * control/MLX segment and therefore is at an offset 3269 * of 16 mod 64. 3270 */ 3271 wmb(); 3272 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc)); 3273 i = 2; 3274 } 3275 3276 *mlx_seg_len = 3277 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16); 3278 return 0; 3279 } 3280 3281 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq) 3282 { 3283 unsigned cur; 3284 struct mlx4_ib_cq *cq; 3285 3286 cur = wq->head - wq->tail; 3287 if (likely(cur + nreq < wq->max_post)) 3288 return 0; 3289 3290 cq = to_mcq(ib_cq); 3291 spin_lock(&cq->lock); 3292 cur = wq->head - wq->tail; 3293 spin_unlock(&cq->lock); 3294 3295 return cur + nreq >= wq->max_post; 3296 } 3297 3298 static __be32 convert_access(int acc) 3299 { 3300 return (acc & IB_ACCESS_REMOTE_ATOMIC ? 3301 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) | 3302 (acc & IB_ACCESS_REMOTE_WRITE ? 3303 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) | 3304 (acc & IB_ACCESS_REMOTE_READ ? 3305 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) | 3306 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) | 3307 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ); 3308 } 3309 3310 static void set_reg_seg(struct mlx4_wqe_fmr_seg *fseg, 3311 const struct ib_reg_wr *wr) 3312 { 3313 struct mlx4_ib_mr *mr = to_mmr(wr->mr); 3314 3315 fseg->flags = convert_access(wr->access); 3316 fseg->mem_key = cpu_to_be32(wr->key); 3317 fseg->buf_list = cpu_to_be64(mr->page_map); 3318 fseg->start_addr = cpu_to_be64(mr->ibmr.iova); 3319 fseg->reg_len = cpu_to_be64(mr->ibmr.length); 3320 fseg->offset = 0; /* XXX -- is this just for ZBVA? */ 3321 fseg->page_size = cpu_to_be32(ilog2(mr->ibmr.page_size)); 3322 fseg->reserved[0] = 0; 3323 fseg->reserved[1] = 0; 3324 } 3325 3326 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey) 3327 { 3328 memset(iseg, 0, sizeof(*iseg)); 3329 iseg->mem_key = cpu_to_be32(rkey); 3330 } 3331 3332 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg, 3333 u64 remote_addr, u32 rkey) 3334 { 3335 rseg->raddr = cpu_to_be64(remote_addr); 3336 rseg->rkey = cpu_to_be32(rkey); 3337 rseg->reserved = 0; 3338 } 3339 3340 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, 3341 const struct ib_atomic_wr *wr) 3342 { 3343 if (wr->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP) { 3344 aseg->swap_add = cpu_to_be64(wr->swap); 3345 aseg->compare = cpu_to_be64(wr->compare_add); 3346 } else if (wr->wr.opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) { 3347 aseg->swap_add = cpu_to_be64(wr->compare_add); 3348 aseg->compare = cpu_to_be64(wr->compare_add_mask); 3349 } else { 3350 aseg->swap_add = cpu_to_be64(wr->compare_add); 3351 aseg->compare = 0; 3352 } 3353 3354 } 3355 3356 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg, 3357 const struct ib_atomic_wr *wr) 3358 { 3359 aseg->swap_add = cpu_to_be64(wr->swap); 3360 aseg->swap_add_mask = cpu_to_be64(wr->swap_mask); 3361 aseg->compare = cpu_to_be64(wr->compare_add); 3362 aseg->compare_mask = cpu_to_be64(wr->compare_add_mask); 3363 } 3364 3365 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg, 3366 const struct ib_ud_wr *wr) 3367 { 3368 memcpy(dseg->av, &to_mah(wr->ah)->av, sizeof (struct mlx4_av)); 3369 dseg->dqpn = cpu_to_be32(wr->remote_qpn); 3370 dseg->qkey = cpu_to_be32(wr->remote_qkey); 3371 dseg->vlan = to_mah(wr->ah)->av.eth.vlan; 3372 memcpy(dseg->mac, to_mah(wr->ah)->av.eth.mac, 6); 3373 } 3374 3375 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev, 3376 struct mlx4_wqe_datagram_seg *dseg, 3377 const struct ib_ud_wr *wr, 3378 enum mlx4_ib_qp_type qpt) 3379 { 3380 union mlx4_ext_av *av = &to_mah(wr->ah)->av; 3381 struct mlx4_av sqp_av = {0}; 3382 int port = *((u8 *) &av->ib.port_pd) & 0x3; 3383 3384 /* force loopback */ 3385 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000); 3386 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */ 3387 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel & 3388 cpu_to_be32(0xf0000000); 3389 3390 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av)); 3391 if (qpt == MLX4_IB_QPT_PROXY_GSI) 3392 dseg->dqpn = cpu_to_be32(dev->dev->caps.spec_qps[port - 1].qp1_tunnel); 3393 else 3394 dseg->dqpn = cpu_to_be32(dev->dev->caps.spec_qps[port - 1].qp0_tunnel); 3395 /* Use QKEY from the QP context, which is set by master */ 3396 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY); 3397 } 3398 3399 static void build_tunnel_header(const struct ib_ud_wr *wr, void *wqe, 3400 unsigned *mlx_seg_len) 3401 { 3402 struct mlx4_wqe_inline_seg *inl = wqe; 3403 struct mlx4_ib_tunnel_header hdr; 3404 struct mlx4_ib_ah *ah = to_mah(wr->ah); 3405 int spc; 3406 int i; 3407 3408 memcpy(&hdr.av, &ah->av, sizeof hdr.av); 3409 hdr.remote_qpn = cpu_to_be32(wr->remote_qpn); 3410 hdr.pkey_index = cpu_to_be16(wr->pkey_index); 3411 hdr.qkey = cpu_to_be32(wr->remote_qkey); 3412 memcpy(hdr.mac, ah->av.eth.mac, 6); 3413 hdr.vlan = ah->av.eth.vlan; 3414 3415 spc = MLX4_INLINE_ALIGN - 3416 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1)); 3417 if (sizeof (hdr) <= spc) { 3418 memcpy(inl + 1, &hdr, sizeof (hdr)); 3419 wmb(); 3420 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr)); 3421 i = 1; 3422 } else { 3423 memcpy(inl + 1, &hdr, spc); 3424 wmb(); 3425 inl->byte_count = cpu_to_be32(1 << 31 | spc); 3426 3427 inl = (void *) (inl + 1) + spc; 3428 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc); 3429 wmb(); 3430 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc)); 3431 i = 2; 3432 } 3433 3434 *mlx_seg_len = 3435 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16); 3436 } 3437 3438 static void set_mlx_icrc_seg(void *dseg) 3439 { 3440 u32 *t = dseg; 3441 struct mlx4_wqe_inline_seg *iseg = dseg; 3442 3443 t[1] = 0; 3444 3445 /* 3446 * Need a barrier here before writing the byte_count field to 3447 * make sure that all the data is visible before the 3448 * byte_count field is set. Otherwise, if the segment begins 3449 * a new cacheline, the HCA prefetcher could grab the 64-byte 3450 * chunk and get a valid (!= * 0xffffffff) byte count but 3451 * stale data, and end up sending the wrong data. 3452 */ 3453 wmb(); 3454 3455 iseg->byte_count = cpu_to_be32((1 << 31) | 4); 3456 } 3457 3458 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg) 3459 { 3460 dseg->lkey = cpu_to_be32(sg->lkey); 3461 dseg->addr = cpu_to_be64(sg->addr); 3462 3463 /* 3464 * Need a barrier here before writing the byte_count field to 3465 * make sure that all the data is visible before the 3466 * byte_count field is set. Otherwise, if the segment begins 3467 * a new cacheline, the HCA prefetcher could grab the 64-byte 3468 * chunk and get a valid (!= * 0xffffffff) byte count but 3469 * stale data, and end up sending the wrong data. 3470 */ 3471 wmb(); 3472 3473 dseg->byte_count = cpu_to_be32(sg->length); 3474 } 3475 3476 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg) 3477 { 3478 dseg->byte_count = cpu_to_be32(sg->length); 3479 dseg->lkey = cpu_to_be32(sg->lkey); 3480 dseg->addr = cpu_to_be64(sg->addr); 3481 } 3482 3483 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, 3484 const struct ib_ud_wr *wr, struct mlx4_ib_qp *qp, 3485 unsigned *lso_seg_len, __be32 *lso_hdr_sz, __be32 *blh) 3486 { 3487 unsigned halign = ALIGN(sizeof *wqe + wr->hlen, 16); 3488 3489 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE)) 3490 *blh = cpu_to_be32(1 << 6); 3491 3492 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) && 3493 wr->wr.num_sge > qp->sq.max_gs - (halign >> 4))) 3494 return -EINVAL; 3495 3496 memcpy(wqe->header, wr->header, wr->hlen); 3497 3498 *lso_hdr_sz = cpu_to_be32(wr->mss << 16 | wr->hlen); 3499 *lso_seg_len = halign; 3500 return 0; 3501 } 3502 3503 static __be32 send_ieth(const struct ib_send_wr *wr) 3504 { 3505 switch (wr->opcode) { 3506 case IB_WR_SEND_WITH_IMM: 3507 case IB_WR_RDMA_WRITE_WITH_IMM: 3508 return wr->ex.imm_data; 3509 3510 case IB_WR_SEND_WITH_INV: 3511 return cpu_to_be32(wr->ex.invalidate_rkey); 3512 3513 default: 3514 return 0; 3515 } 3516 } 3517 3518 static void add_zero_len_inline(void *wqe) 3519 { 3520 struct mlx4_wqe_inline_seg *inl = wqe; 3521 memset(wqe, 0, 16); 3522 inl->byte_count = cpu_to_be32(1 << 31); 3523 } 3524 3525 static int _mlx4_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 3526 const struct ib_send_wr **bad_wr, bool drain) 3527 { 3528 struct mlx4_ib_qp *qp = to_mqp(ibqp); 3529 void *wqe; 3530 struct mlx4_wqe_ctrl_seg *ctrl; 3531 struct mlx4_wqe_data_seg *dseg; 3532 unsigned long flags; 3533 int nreq; 3534 int err = 0; 3535 unsigned ind; 3536 int uninitialized_var(size); 3537 unsigned uninitialized_var(seglen); 3538 __be32 dummy; 3539 __be32 *lso_wqe; 3540 __be32 uninitialized_var(lso_hdr_sz); 3541 __be32 blh; 3542 int i; 3543 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device); 3544 3545 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) { 3546 struct mlx4_ib_sqp *sqp = to_msqp(qp); 3547 3548 if (sqp->roce_v2_gsi) { 3549 struct mlx4_ib_ah *ah = to_mah(ud_wr(wr)->ah); 3550 enum ib_gid_type gid_type; 3551 union ib_gid gid; 3552 3553 if (!fill_gid_by_hw_index(mdev, sqp->qp.port, 3554 ah->av.ib.gid_index, 3555 &gid, &gid_type)) 3556 qp = (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 3557 to_mqp(sqp->roce_v2_gsi) : qp; 3558 else 3559 pr_err("Failed to get gid at index %d. RoCEv2 will not work properly\n", 3560 ah->av.ib.gid_index); 3561 } 3562 } 3563 3564 spin_lock_irqsave(&qp->sq.lock, flags); 3565 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR && 3566 !drain) { 3567 err = -EIO; 3568 *bad_wr = wr; 3569 nreq = 0; 3570 goto out; 3571 } 3572 3573 ind = qp->sq_next_wqe; 3574 3575 for (nreq = 0; wr; ++nreq, wr = wr->next) { 3576 lso_wqe = &dummy; 3577 blh = 0; 3578 3579 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) { 3580 err = -ENOMEM; 3581 *bad_wr = wr; 3582 goto out; 3583 } 3584 3585 if (unlikely(wr->num_sge > qp->sq.max_gs)) { 3586 err = -EINVAL; 3587 *bad_wr = wr; 3588 goto out; 3589 } 3590 3591 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1)); 3592 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id; 3593 3594 ctrl->srcrb_flags = 3595 (wr->send_flags & IB_SEND_SIGNALED ? 3596 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) | 3597 (wr->send_flags & IB_SEND_SOLICITED ? 3598 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) | 3599 ((wr->send_flags & IB_SEND_IP_CSUM) ? 3600 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM | 3601 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) | 3602 qp->sq_signal_bits; 3603 3604 ctrl->imm = send_ieth(wr); 3605 3606 wqe += sizeof *ctrl; 3607 size = sizeof *ctrl / 16; 3608 3609 switch (qp->mlx4_ib_qp_type) { 3610 case MLX4_IB_QPT_RC: 3611 case MLX4_IB_QPT_UC: 3612 switch (wr->opcode) { 3613 case IB_WR_ATOMIC_CMP_AND_SWP: 3614 case IB_WR_ATOMIC_FETCH_AND_ADD: 3615 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD: 3616 set_raddr_seg(wqe, atomic_wr(wr)->remote_addr, 3617 atomic_wr(wr)->rkey); 3618 wqe += sizeof (struct mlx4_wqe_raddr_seg); 3619 3620 set_atomic_seg(wqe, atomic_wr(wr)); 3621 wqe += sizeof (struct mlx4_wqe_atomic_seg); 3622 3623 size += (sizeof (struct mlx4_wqe_raddr_seg) + 3624 sizeof (struct mlx4_wqe_atomic_seg)) / 16; 3625 3626 break; 3627 3628 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP: 3629 set_raddr_seg(wqe, atomic_wr(wr)->remote_addr, 3630 atomic_wr(wr)->rkey); 3631 wqe += sizeof (struct mlx4_wqe_raddr_seg); 3632 3633 set_masked_atomic_seg(wqe, atomic_wr(wr)); 3634 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg); 3635 3636 size += (sizeof (struct mlx4_wqe_raddr_seg) + 3637 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16; 3638 3639 break; 3640 3641 case IB_WR_RDMA_READ: 3642 case IB_WR_RDMA_WRITE: 3643 case IB_WR_RDMA_WRITE_WITH_IMM: 3644 set_raddr_seg(wqe, rdma_wr(wr)->remote_addr, 3645 rdma_wr(wr)->rkey); 3646 wqe += sizeof (struct mlx4_wqe_raddr_seg); 3647 size += sizeof (struct mlx4_wqe_raddr_seg) / 16; 3648 break; 3649 3650 case IB_WR_LOCAL_INV: 3651 ctrl->srcrb_flags |= 3652 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER); 3653 set_local_inv_seg(wqe, wr->ex.invalidate_rkey); 3654 wqe += sizeof (struct mlx4_wqe_local_inval_seg); 3655 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16; 3656 break; 3657 3658 case IB_WR_REG_MR: 3659 ctrl->srcrb_flags |= 3660 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER); 3661 set_reg_seg(wqe, reg_wr(wr)); 3662 wqe += sizeof(struct mlx4_wqe_fmr_seg); 3663 size += sizeof(struct mlx4_wqe_fmr_seg) / 16; 3664 break; 3665 3666 default: 3667 /* No extra segments required for sends */ 3668 break; 3669 } 3670 break; 3671 3672 case MLX4_IB_QPT_TUN_SMI_OWNER: 3673 err = build_sriov_qp0_header(to_msqp(qp), ud_wr(wr), 3674 ctrl, &seglen); 3675 if (unlikely(err)) { 3676 *bad_wr = wr; 3677 goto out; 3678 } 3679 wqe += seglen; 3680 size += seglen / 16; 3681 break; 3682 case MLX4_IB_QPT_TUN_SMI: 3683 case MLX4_IB_QPT_TUN_GSI: 3684 /* this is a UD qp used in MAD responses to slaves. */ 3685 set_datagram_seg(wqe, ud_wr(wr)); 3686 /* set the forced-loopback bit in the data seg av */ 3687 *(__be32 *) wqe |= cpu_to_be32(0x80000000); 3688 wqe += sizeof (struct mlx4_wqe_datagram_seg); 3689 size += sizeof (struct mlx4_wqe_datagram_seg) / 16; 3690 break; 3691 case MLX4_IB_QPT_UD: 3692 set_datagram_seg(wqe, ud_wr(wr)); 3693 wqe += sizeof (struct mlx4_wqe_datagram_seg); 3694 size += sizeof (struct mlx4_wqe_datagram_seg) / 16; 3695 3696 if (wr->opcode == IB_WR_LSO) { 3697 err = build_lso_seg(wqe, ud_wr(wr), qp, &seglen, 3698 &lso_hdr_sz, &blh); 3699 if (unlikely(err)) { 3700 *bad_wr = wr; 3701 goto out; 3702 } 3703 lso_wqe = (__be32 *) wqe; 3704 wqe += seglen; 3705 size += seglen / 16; 3706 } 3707 break; 3708 3709 case MLX4_IB_QPT_PROXY_SMI_OWNER: 3710 err = build_sriov_qp0_header(to_msqp(qp), ud_wr(wr), 3711 ctrl, &seglen); 3712 if (unlikely(err)) { 3713 *bad_wr = wr; 3714 goto out; 3715 } 3716 wqe += seglen; 3717 size += seglen / 16; 3718 /* to start tunnel header on a cache-line boundary */ 3719 add_zero_len_inline(wqe); 3720 wqe += 16; 3721 size++; 3722 build_tunnel_header(ud_wr(wr), wqe, &seglen); 3723 wqe += seglen; 3724 size += seglen / 16; 3725 break; 3726 case MLX4_IB_QPT_PROXY_SMI: 3727 case MLX4_IB_QPT_PROXY_GSI: 3728 /* If we are tunneling special qps, this is a UD qp. 3729 * In this case we first add a UD segment targeting 3730 * the tunnel qp, and then add a header with address 3731 * information */ 3732 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, 3733 ud_wr(wr), 3734 qp->mlx4_ib_qp_type); 3735 wqe += sizeof (struct mlx4_wqe_datagram_seg); 3736 size += sizeof (struct mlx4_wqe_datagram_seg) / 16; 3737 build_tunnel_header(ud_wr(wr), wqe, &seglen); 3738 wqe += seglen; 3739 size += seglen / 16; 3740 break; 3741 3742 case MLX4_IB_QPT_SMI: 3743 case MLX4_IB_QPT_GSI: 3744 err = build_mlx_header(to_msqp(qp), ud_wr(wr), ctrl, 3745 &seglen); 3746 if (unlikely(err)) { 3747 *bad_wr = wr; 3748 goto out; 3749 } 3750 wqe += seglen; 3751 size += seglen / 16; 3752 break; 3753 3754 default: 3755 break; 3756 } 3757 3758 /* 3759 * Write data segments in reverse order, so as to 3760 * overwrite cacheline stamp last within each 3761 * cacheline. This avoids issues with WQE 3762 * prefetching. 3763 */ 3764 3765 dseg = wqe; 3766 dseg += wr->num_sge - 1; 3767 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16); 3768 3769 /* Add one more inline data segment for ICRC for MLX sends */ 3770 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI || 3771 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI || 3772 qp->mlx4_ib_qp_type & 3773 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) { 3774 set_mlx_icrc_seg(dseg + 1); 3775 size += sizeof (struct mlx4_wqe_data_seg) / 16; 3776 } 3777 3778 for (i = wr->num_sge - 1; i >= 0; --i, --dseg) 3779 set_data_seg(dseg, wr->sg_list + i); 3780 3781 /* 3782 * Possibly overwrite stamping in cacheline with LSO 3783 * segment only after making sure all data segments 3784 * are written. 3785 */ 3786 wmb(); 3787 *lso_wqe = lso_hdr_sz; 3788 3789 ctrl->qpn_vlan.fence_size = (wr->send_flags & IB_SEND_FENCE ? 3790 MLX4_WQE_CTRL_FENCE : 0) | size; 3791 3792 /* 3793 * Make sure descriptor is fully written before 3794 * setting ownership bit (because HW can start 3795 * executing as soon as we do). 3796 */ 3797 wmb(); 3798 3799 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) { 3800 *bad_wr = wr; 3801 err = -EINVAL; 3802 goto out; 3803 } 3804 3805 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] | 3806 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh; 3807 3808 /* 3809 * We can improve latency by not stamping the last 3810 * send queue WQE until after ringing the doorbell, so 3811 * only stamp here if there are still more WQEs to post. 3812 */ 3813 if (wr->next) 3814 stamp_send_wqe(qp, ind + qp->sq_spare_wqes); 3815 ind++; 3816 } 3817 3818 out: 3819 if (likely(nreq)) { 3820 qp->sq.head += nreq; 3821 3822 /* 3823 * Make sure that descriptors are written before 3824 * doorbell record. 3825 */ 3826 wmb(); 3827 3828 writel_relaxed(qp->doorbell_qpn, 3829 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL); 3830 3831 stamp_send_wqe(qp, ind + qp->sq_spare_wqes - 1); 3832 3833 qp->sq_next_wqe = ind; 3834 } 3835 3836 spin_unlock_irqrestore(&qp->sq.lock, flags); 3837 3838 return err; 3839 } 3840 3841 int mlx4_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 3842 const struct ib_send_wr **bad_wr) 3843 { 3844 return _mlx4_ib_post_send(ibqp, wr, bad_wr, false); 3845 } 3846 3847 static int _mlx4_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 3848 const struct ib_recv_wr **bad_wr, bool drain) 3849 { 3850 struct mlx4_ib_qp *qp = to_mqp(ibqp); 3851 struct mlx4_wqe_data_seg *scat; 3852 unsigned long flags; 3853 int err = 0; 3854 int nreq; 3855 int ind; 3856 int max_gs; 3857 int i; 3858 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device); 3859 3860 max_gs = qp->rq.max_gs; 3861 spin_lock_irqsave(&qp->rq.lock, flags); 3862 3863 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR && 3864 !drain) { 3865 err = -EIO; 3866 *bad_wr = wr; 3867 nreq = 0; 3868 goto out; 3869 } 3870 3871 ind = qp->rq.head & (qp->rq.wqe_cnt - 1); 3872 3873 for (nreq = 0; wr; ++nreq, wr = wr->next) { 3874 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) { 3875 err = -ENOMEM; 3876 *bad_wr = wr; 3877 goto out; 3878 } 3879 3880 if (unlikely(wr->num_sge > qp->rq.max_gs)) { 3881 err = -EINVAL; 3882 *bad_wr = wr; 3883 goto out; 3884 } 3885 3886 scat = get_recv_wqe(qp, ind); 3887 3888 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 3889 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) { 3890 ib_dma_sync_single_for_device(ibqp->device, 3891 qp->sqp_proxy_rcv[ind].map, 3892 sizeof (struct mlx4_ib_proxy_sqp_hdr), 3893 DMA_FROM_DEVICE); 3894 scat->byte_count = 3895 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr)); 3896 /* use dma lkey from upper layer entry */ 3897 scat->lkey = cpu_to_be32(wr->sg_list->lkey); 3898 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map); 3899 scat++; 3900 max_gs--; 3901 } 3902 3903 for (i = 0; i < wr->num_sge; ++i) 3904 __set_data_seg(scat + i, wr->sg_list + i); 3905 3906 if (i < max_gs) { 3907 scat[i].byte_count = 0; 3908 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY); 3909 scat[i].addr = 0; 3910 } 3911 3912 qp->rq.wrid[ind] = wr->wr_id; 3913 3914 ind = (ind + 1) & (qp->rq.wqe_cnt - 1); 3915 } 3916 3917 out: 3918 if (likely(nreq)) { 3919 qp->rq.head += nreq; 3920 3921 /* 3922 * Make sure that descriptors are written before 3923 * doorbell record. 3924 */ 3925 wmb(); 3926 3927 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff); 3928 } 3929 3930 spin_unlock_irqrestore(&qp->rq.lock, flags); 3931 3932 return err; 3933 } 3934 3935 int mlx4_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 3936 const struct ib_recv_wr **bad_wr) 3937 { 3938 return _mlx4_ib_post_recv(ibqp, wr, bad_wr, false); 3939 } 3940 3941 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state) 3942 { 3943 switch (mlx4_state) { 3944 case MLX4_QP_STATE_RST: return IB_QPS_RESET; 3945 case MLX4_QP_STATE_INIT: return IB_QPS_INIT; 3946 case MLX4_QP_STATE_RTR: return IB_QPS_RTR; 3947 case MLX4_QP_STATE_RTS: return IB_QPS_RTS; 3948 case MLX4_QP_STATE_SQ_DRAINING: 3949 case MLX4_QP_STATE_SQD: return IB_QPS_SQD; 3950 case MLX4_QP_STATE_SQER: return IB_QPS_SQE; 3951 case MLX4_QP_STATE_ERR: return IB_QPS_ERR; 3952 default: return -1; 3953 } 3954 } 3955 3956 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state) 3957 { 3958 switch (mlx4_mig_state) { 3959 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED; 3960 case MLX4_QP_PM_REARM: return IB_MIG_REARM; 3961 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED; 3962 default: return -1; 3963 } 3964 } 3965 3966 static int to_ib_qp_access_flags(int mlx4_flags) 3967 { 3968 int ib_flags = 0; 3969 3970 if (mlx4_flags & MLX4_QP_BIT_RRE) 3971 ib_flags |= IB_ACCESS_REMOTE_READ; 3972 if (mlx4_flags & MLX4_QP_BIT_RWE) 3973 ib_flags |= IB_ACCESS_REMOTE_WRITE; 3974 if (mlx4_flags & MLX4_QP_BIT_RAE) 3975 ib_flags |= IB_ACCESS_REMOTE_ATOMIC; 3976 3977 return ib_flags; 3978 } 3979 3980 static void to_rdma_ah_attr(struct mlx4_ib_dev *ibdev, 3981 struct rdma_ah_attr *ah_attr, 3982 struct mlx4_qp_path *path) 3983 { 3984 struct mlx4_dev *dev = ibdev->dev; 3985 u8 port_num = path->sched_queue & 0x40 ? 2 : 1; 3986 3987 memset(ah_attr, 0, sizeof(*ah_attr)); 3988 if (port_num == 0 || port_num > dev->caps.num_ports) 3989 return; 3990 ah_attr->type = rdma_ah_find_type(&ibdev->ib_dev, port_num); 3991 3992 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) 3993 rdma_ah_set_sl(ah_attr, ((path->sched_queue >> 3) & 0x7) | 3994 ((path->sched_queue & 4) << 1)); 3995 else 3996 rdma_ah_set_sl(ah_attr, (path->sched_queue >> 2) & 0xf); 3997 rdma_ah_set_port_num(ah_attr, port_num); 3998 3999 rdma_ah_set_dlid(ah_attr, be16_to_cpu(path->rlid)); 4000 rdma_ah_set_path_bits(ah_attr, path->grh_mylmc & 0x7f); 4001 rdma_ah_set_static_rate(ah_attr, 4002 path->static_rate ? path->static_rate - 5 : 0); 4003 if (path->grh_mylmc & (1 << 7)) { 4004 rdma_ah_set_grh(ah_attr, NULL, 4005 be32_to_cpu(path->tclass_flowlabel) & 0xfffff, 4006 path->mgid_index, 4007 path->hop_limit, 4008 (be32_to_cpu(path->tclass_flowlabel) 4009 >> 20) & 0xff); 4010 rdma_ah_set_dgid_raw(ah_attr, path->rgid); 4011 } 4012 } 4013 4014 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask, 4015 struct ib_qp_init_attr *qp_init_attr) 4016 { 4017 struct mlx4_ib_dev *dev = to_mdev(ibqp->device); 4018 struct mlx4_ib_qp *qp = to_mqp(ibqp); 4019 struct mlx4_qp_context context; 4020 int mlx4_state; 4021 int err = 0; 4022 4023 if (ibqp->rwq_ind_tbl) 4024 return -EOPNOTSUPP; 4025 4026 mutex_lock(&qp->mutex); 4027 4028 if (qp->state == IB_QPS_RESET) { 4029 qp_attr->qp_state = IB_QPS_RESET; 4030 goto done; 4031 } 4032 4033 err = mlx4_qp_query(dev->dev, &qp->mqp, &context); 4034 if (err) { 4035 err = -EINVAL; 4036 goto out; 4037 } 4038 4039 mlx4_state = be32_to_cpu(context.flags) >> 28; 4040 4041 qp->state = to_ib_qp_state(mlx4_state); 4042 qp_attr->qp_state = qp->state; 4043 qp_attr->path_mtu = context.mtu_msgmax >> 5; 4044 qp_attr->path_mig_state = 4045 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3); 4046 qp_attr->qkey = be32_to_cpu(context.qkey); 4047 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff; 4048 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff; 4049 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff; 4050 qp_attr->qp_access_flags = 4051 to_ib_qp_access_flags(be32_to_cpu(context.params2)); 4052 4053 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) { 4054 to_rdma_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path); 4055 to_rdma_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path); 4056 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f; 4057 qp_attr->alt_port_num = 4058 rdma_ah_get_port_num(&qp_attr->alt_ah_attr); 4059 } 4060 4061 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f; 4062 if (qp_attr->qp_state == IB_QPS_INIT) 4063 qp_attr->port_num = qp->port; 4064 else 4065 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1; 4066 4067 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */ 4068 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING; 4069 4070 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7); 4071 4072 qp_attr->max_dest_rd_atomic = 4073 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7); 4074 qp_attr->min_rnr_timer = 4075 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f; 4076 qp_attr->timeout = context.pri_path.ackto >> 3; 4077 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7; 4078 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7; 4079 qp_attr->alt_timeout = context.alt_path.ackto >> 3; 4080 4081 done: 4082 qp_attr->cur_qp_state = qp_attr->qp_state; 4083 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt; 4084 qp_attr->cap.max_recv_sge = qp->rq.max_gs; 4085 4086 if (!ibqp->uobject) { 4087 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt; 4088 qp_attr->cap.max_send_sge = qp->sq.max_gs; 4089 } else { 4090 qp_attr->cap.max_send_wr = 0; 4091 qp_attr->cap.max_send_sge = 0; 4092 } 4093 4094 /* 4095 * We don't support inline sends for kernel QPs (yet), and we 4096 * don't know what userspace's value should be. 4097 */ 4098 qp_attr->cap.max_inline_data = 0; 4099 4100 qp_init_attr->cap = qp_attr->cap; 4101 4102 qp_init_attr->create_flags = 0; 4103 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) 4104 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK; 4105 4106 if (qp->flags & MLX4_IB_QP_LSO) 4107 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO; 4108 4109 if (qp->flags & MLX4_IB_QP_NETIF) 4110 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP; 4111 4112 qp_init_attr->sq_sig_type = 4113 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ? 4114 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR; 4115 4116 out: 4117 mutex_unlock(&qp->mutex); 4118 return err; 4119 } 4120 4121 struct ib_wq *mlx4_ib_create_wq(struct ib_pd *pd, 4122 struct ib_wq_init_attr *init_attr, 4123 struct ib_udata *udata) 4124 { 4125 struct mlx4_dev *dev = to_mdev(pd->device)->dev; 4126 struct ib_qp_init_attr ib_qp_init_attr = {}; 4127 struct mlx4_ib_qp *qp; 4128 struct mlx4_ib_create_wq ucmd; 4129 int err, required_cmd_sz; 4130 4131 if (!udata) 4132 return ERR_PTR(-EINVAL); 4133 4134 required_cmd_sz = offsetof(typeof(ucmd), comp_mask) + 4135 sizeof(ucmd.comp_mask); 4136 if (udata->inlen < required_cmd_sz) { 4137 pr_debug("invalid inlen\n"); 4138 return ERR_PTR(-EINVAL); 4139 } 4140 4141 if (udata->inlen > sizeof(ucmd) && 4142 !ib_is_udata_cleared(udata, sizeof(ucmd), 4143 udata->inlen - sizeof(ucmd))) { 4144 pr_debug("inlen is not supported\n"); 4145 return ERR_PTR(-EOPNOTSUPP); 4146 } 4147 4148 if (udata->outlen) 4149 return ERR_PTR(-EOPNOTSUPP); 4150 4151 if (init_attr->wq_type != IB_WQT_RQ) { 4152 pr_debug("unsupported wq type %d\n", init_attr->wq_type); 4153 return ERR_PTR(-EOPNOTSUPP); 4154 } 4155 4156 if (init_attr->create_flags & ~IB_WQ_FLAGS_SCATTER_FCS || 4157 !(dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP)) { 4158 pr_debug("unsupported create_flags %u\n", 4159 init_attr->create_flags); 4160 return ERR_PTR(-EOPNOTSUPP); 4161 } 4162 4163 qp = kzalloc(sizeof(*qp), GFP_KERNEL); 4164 if (!qp) 4165 return ERR_PTR(-ENOMEM); 4166 4167 qp->pri.vid = 0xFFFF; 4168 qp->alt.vid = 0xFFFF; 4169 4170 ib_qp_init_attr.qp_context = init_attr->wq_context; 4171 ib_qp_init_attr.qp_type = IB_QPT_RAW_PACKET; 4172 ib_qp_init_attr.cap.max_recv_wr = init_attr->max_wr; 4173 ib_qp_init_attr.cap.max_recv_sge = init_attr->max_sge; 4174 ib_qp_init_attr.recv_cq = init_attr->cq; 4175 ib_qp_init_attr.send_cq = ib_qp_init_attr.recv_cq; /* Dummy CQ */ 4176 4177 if (init_attr->create_flags & IB_WQ_FLAGS_SCATTER_FCS) 4178 ib_qp_init_attr.create_flags |= IB_QP_CREATE_SCATTER_FCS; 4179 4180 err = create_rq(pd, &ib_qp_init_attr, udata, qp); 4181 if (err) { 4182 kfree(qp); 4183 return ERR_PTR(err); 4184 } 4185 4186 qp->ibwq.event_handler = init_attr->event_handler; 4187 qp->ibwq.wq_num = qp->mqp.qpn; 4188 qp->ibwq.state = IB_WQS_RESET; 4189 4190 return &qp->ibwq; 4191 } 4192 4193 static int ib_wq2qp_state(enum ib_wq_state state) 4194 { 4195 switch (state) { 4196 case IB_WQS_RESET: 4197 return IB_QPS_RESET; 4198 case IB_WQS_RDY: 4199 return IB_QPS_RTR; 4200 default: 4201 return IB_QPS_ERR; 4202 } 4203 } 4204 4205 static int _mlx4_ib_modify_wq(struct ib_wq *ibwq, enum ib_wq_state new_state, 4206 struct ib_udata *udata) 4207 { 4208 struct mlx4_ib_qp *qp = to_mqp((struct ib_qp *)ibwq); 4209 enum ib_qp_state qp_cur_state; 4210 enum ib_qp_state qp_new_state; 4211 int attr_mask; 4212 int err; 4213 4214 /* ib_qp.state represents the WQ HW state while ib_wq.state represents 4215 * the WQ logic state. 4216 */ 4217 qp_cur_state = qp->state; 4218 qp_new_state = ib_wq2qp_state(new_state); 4219 4220 if (ib_wq2qp_state(new_state) == qp_cur_state) 4221 return 0; 4222 4223 if (new_state == IB_WQS_RDY) { 4224 struct ib_qp_attr attr = {}; 4225 4226 attr.port_num = qp->port; 4227 attr_mask = IB_QP_PORT; 4228 4229 err = __mlx4_ib_modify_qp(ibwq, MLX4_IB_RWQ_SRC, &attr, 4230 attr_mask, IB_QPS_RESET, IB_QPS_INIT, 4231 udata); 4232 if (err) { 4233 pr_debug("WQN=0x%06x failed to apply RST->INIT on the HW QP\n", 4234 ibwq->wq_num); 4235 return err; 4236 } 4237 4238 qp_cur_state = IB_QPS_INIT; 4239 } 4240 4241 attr_mask = 0; 4242 err = __mlx4_ib_modify_qp(ibwq, MLX4_IB_RWQ_SRC, NULL, attr_mask, 4243 qp_cur_state, qp_new_state, udata); 4244 4245 if (err && (qp_cur_state == IB_QPS_INIT)) { 4246 qp_new_state = IB_QPS_RESET; 4247 if (__mlx4_ib_modify_qp(ibwq, MLX4_IB_RWQ_SRC, NULL, 4248 attr_mask, IB_QPS_INIT, IB_QPS_RESET, 4249 udata)) { 4250 pr_warn("WQN=0x%06x failed with reverting HW's resources failure\n", 4251 ibwq->wq_num); 4252 qp_new_state = IB_QPS_INIT; 4253 } 4254 } 4255 4256 qp->state = qp_new_state; 4257 4258 return err; 4259 } 4260 4261 int mlx4_ib_modify_wq(struct ib_wq *ibwq, struct ib_wq_attr *wq_attr, 4262 u32 wq_attr_mask, struct ib_udata *udata) 4263 { 4264 struct mlx4_ib_qp *qp = to_mqp((struct ib_qp *)ibwq); 4265 struct mlx4_ib_modify_wq ucmd = {}; 4266 size_t required_cmd_sz; 4267 enum ib_wq_state cur_state, new_state; 4268 int err = 0; 4269 4270 required_cmd_sz = offsetof(typeof(ucmd), reserved) + 4271 sizeof(ucmd.reserved); 4272 if (udata->inlen < required_cmd_sz) 4273 return -EINVAL; 4274 4275 if (udata->inlen > sizeof(ucmd) && 4276 !ib_is_udata_cleared(udata, sizeof(ucmd), 4277 udata->inlen - sizeof(ucmd))) 4278 return -EOPNOTSUPP; 4279 4280 if (ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen))) 4281 return -EFAULT; 4282 4283 if (ucmd.comp_mask || ucmd.reserved) 4284 return -EOPNOTSUPP; 4285 4286 if (wq_attr_mask & IB_WQ_FLAGS) 4287 return -EOPNOTSUPP; 4288 4289 cur_state = wq_attr_mask & IB_WQ_CUR_STATE ? wq_attr->curr_wq_state : 4290 ibwq->state; 4291 new_state = wq_attr_mask & IB_WQ_STATE ? wq_attr->wq_state : cur_state; 4292 4293 if (cur_state < IB_WQS_RESET || cur_state > IB_WQS_ERR || 4294 new_state < IB_WQS_RESET || new_state > IB_WQS_ERR) 4295 return -EINVAL; 4296 4297 if ((new_state == IB_WQS_RDY) && (cur_state == IB_WQS_ERR)) 4298 return -EINVAL; 4299 4300 if ((new_state == IB_WQS_ERR) && (cur_state == IB_WQS_RESET)) 4301 return -EINVAL; 4302 4303 /* Need to protect against the parent RSS which also may modify WQ 4304 * state. 4305 */ 4306 mutex_lock(&qp->mutex); 4307 4308 /* Can update HW state only if a RSS QP has already associated to this 4309 * WQ, so we can apply its port on the WQ. 4310 */ 4311 if (qp->rss_usecnt) 4312 err = _mlx4_ib_modify_wq(ibwq, new_state, udata); 4313 4314 if (!err) 4315 ibwq->state = new_state; 4316 4317 mutex_unlock(&qp->mutex); 4318 4319 return err; 4320 } 4321 4322 void mlx4_ib_destroy_wq(struct ib_wq *ibwq, struct ib_udata *udata) 4323 { 4324 struct mlx4_ib_dev *dev = to_mdev(ibwq->device); 4325 struct mlx4_ib_qp *qp = to_mqp((struct ib_qp *)ibwq); 4326 4327 if (qp->counter_index) 4328 mlx4_ib_free_qp_counter(dev, qp); 4329 4330 destroy_qp_common(dev, qp, MLX4_IB_RWQ_SRC, udata); 4331 4332 kfree(qp); 4333 } 4334 4335 struct ib_rwq_ind_table 4336 *mlx4_ib_create_rwq_ind_table(struct ib_device *device, 4337 struct ib_rwq_ind_table_init_attr *init_attr, 4338 struct ib_udata *udata) 4339 { 4340 struct ib_rwq_ind_table *rwq_ind_table; 4341 struct mlx4_ib_create_rwq_ind_tbl_resp resp = {}; 4342 unsigned int ind_tbl_size = 1 << init_attr->log_ind_tbl_size; 4343 unsigned int base_wqn; 4344 size_t min_resp_len; 4345 int i; 4346 int err; 4347 4348 if (udata->inlen > 0 && 4349 !ib_is_udata_cleared(udata, 0, 4350 udata->inlen)) 4351 return ERR_PTR(-EOPNOTSUPP); 4352 4353 min_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved); 4354 if (udata->outlen && udata->outlen < min_resp_len) 4355 return ERR_PTR(-EINVAL); 4356 4357 if (ind_tbl_size > 4358 device->attrs.rss_caps.max_rwq_indirection_table_size) { 4359 pr_debug("log_ind_tbl_size = %d is bigger than supported = %d\n", 4360 ind_tbl_size, 4361 device->attrs.rss_caps.max_rwq_indirection_table_size); 4362 return ERR_PTR(-EINVAL); 4363 } 4364 4365 base_wqn = init_attr->ind_tbl[0]->wq_num; 4366 4367 if (base_wqn % ind_tbl_size) { 4368 pr_debug("WQN=0x%x isn't aligned with indirection table size\n", 4369 base_wqn); 4370 return ERR_PTR(-EINVAL); 4371 } 4372 4373 for (i = 1; i < ind_tbl_size; i++) { 4374 if (++base_wqn != init_attr->ind_tbl[i]->wq_num) { 4375 pr_debug("indirection table's WQNs aren't consecutive\n"); 4376 return ERR_PTR(-EINVAL); 4377 } 4378 } 4379 4380 rwq_ind_table = kzalloc(sizeof(*rwq_ind_table), GFP_KERNEL); 4381 if (!rwq_ind_table) 4382 return ERR_PTR(-ENOMEM); 4383 4384 if (udata->outlen) { 4385 resp.response_length = offsetof(typeof(resp), response_length) + 4386 sizeof(resp.response_length); 4387 err = ib_copy_to_udata(udata, &resp, resp.response_length); 4388 if (err) 4389 goto err; 4390 } 4391 4392 return rwq_ind_table; 4393 4394 err: 4395 kfree(rwq_ind_table); 4396 return ERR_PTR(err); 4397 } 4398 4399 int mlx4_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_tbl) 4400 { 4401 kfree(ib_rwq_ind_tbl); 4402 return 0; 4403 } 4404 4405 struct mlx4_ib_drain_cqe { 4406 struct ib_cqe cqe; 4407 struct completion done; 4408 }; 4409 4410 static void mlx4_ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc) 4411 { 4412 struct mlx4_ib_drain_cqe *cqe = container_of(wc->wr_cqe, 4413 struct mlx4_ib_drain_cqe, 4414 cqe); 4415 4416 complete(&cqe->done); 4417 } 4418 4419 /* This function returns only once the drained WR was completed */ 4420 static void handle_drain_completion(struct ib_cq *cq, 4421 struct mlx4_ib_drain_cqe *sdrain, 4422 struct mlx4_ib_dev *dev) 4423 { 4424 struct mlx4_dev *mdev = dev->dev; 4425 4426 if (cq->poll_ctx == IB_POLL_DIRECT) { 4427 while (wait_for_completion_timeout(&sdrain->done, HZ / 10) <= 0) 4428 ib_process_cq_direct(cq, -1); 4429 return; 4430 } 4431 4432 if (mdev->persist->state == MLX4_DEVICE_STATE_INTERNAL_ERROR) { 4433 struct mlx4_ib_cq *mcq = to_mcq(cq); 4434 bool triggered = false; 4435 unsigned long flags; 4436 4437 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags); 4438 /* Make sure that the CQ handler won't run if wasn't run yet */ 4439 if (!mcq->mcq.reset_notify_added) 4440 mcq->mcq.reset_notify_added = 1; 4441 else 4442 triggered = true; 4443 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags); 4444 4445 if (triggered) { 4446 /* Wait for any scheduled/running task to be ended */ 4447 switch (cq->poll_ctx) { 4448 case IB_POLL_SOFTIRQ: 4449 irq_poll_disable(&cq->iop); 4450 irq_poll_enable(&cq->iop); 4451 break; 4452 case IB_POLL_WORKQUEUE: 4453 cancel_work_sync(&cq->work); 4454 break; 4455 default: 4456 WARN_ON_ONCE(1); 4457 } 4458 } 4459 4460 /* Run the CQ handler - this makes sure that the drain WR will 4461 * be processed if wasn't processed yet. 4462 */ 4463 mcq->mcq.comp(&mcq->mcq); 4464 } 4465 4466 wait_for_completion(&sdrain->done); 4467 } 4468 4469 void mlx4_ib_drain_sq(struct ib_qp *qp) 4470 { 4471 struct ib_cq *cq = qp->send_cq; 4472 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 4473 struct mlx4_ib_drain_cqe sdrain; 4474 const struct ib_send_wr *bad_swr; 4475 struct ib_rdma_wr swr = { 4476 .wr = { 4477 .next = NULL, 4478 { .wr_cqe = &sdrain.cqe, }, 4479 .opcode = IB_WR_RDMA_WRITE, 4480 }, 4481 }; 4482 int ret; 4483 struct mlx4_ib_dev *dev = to_mdev(qp->device); 4484 struct mlx4_dev *mdev = dev->dev; 4485 4486 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 4487 if (ret && mdev->persist->state != MLX4_DEVICE_STATE_INTERNAL_ERROR) { 4488 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 4489 return; 4490 } 4491 4492 sdrain.cqe.done = mlx4_ib_drain_qp_done; 4493 init_completion(&sdrain.done); 4494 4495 ret = _mlx4_ib_post_send(qp, &swr.wr, &bad_swr, true); 4496 if (ret) { 4497 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 4498 return; 4499 } 4500 4501 handle_drain_completion(cq, &sdrain, dev); 4502 } 4503 4504 void mlx4_ib_drain_rq(struct ib_qp *qp) 4505 { 4506 struct ib_cq *cq = qp->recv_cq; 4507 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 4508 struct mlx4_ib_drain_cqe rdrain; 4509 struct ib_recv_wr rwr = {}; 4510 const struct ib_recv_wr *bad_rwr; 4511 int ret; 4512 struct mlx4_ib_dev *dev = to_mdev(qp->device); 4513 struct mlx4_dev *mdev = dev->dev; 4514 4515 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 4516 if (ret && mdev->persist->state != MLX4_DEVICE_STATE_INTERNAL_ERROR) { 4517 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 4518 return; 4519 } 4520 4521 rwr.wr_cqe = &rdrain.cqe; 4522 rdrain.cqe.done = mlx4_ib_drain_qp_done; 4523 init_completion(&rdrain.done); 4524 4525 ret = _mlx4_ib_post_recv(qp, &rwr, &bad_rwr, true); 4526 if (ret) { 4527 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 4528 return; 4529 } 4530 4531 handle_drain_completion(cq, &rdrain, dev); 4532 } 4533