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/slab.h> 36#include <linux/netdevice.h> 37#include <linux/bitops.h> 38#include <linux/rcupdate.h> 39#include <linux/etherdevice.h> 40 41#include <rdma/ib_cache.h> 42#include <rdma/ib_pack.h> 43#include <rdma/ib_addr.h> 44#include <rdma/ib_mad.h> 45#include <rdma/uverbs_ioctl.h> 46 47#include <dev/mlx4/cmd.h> 48#include <dev/mlx4/qp.h> 49#include <dev/mlx4/driver.h> 50#include <linux/io.h> 51 52#include "mlx4_ib.h" 53#include <rdma/mlx4-abi.h> 54 55static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, 56 struct mlx4_ib_cq *recv_cq); 57static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, 58 struct mlx4_ib_cq *recv_cq); 59 60enum { 61 MLX4_IB_ACK_REQ_FREQ = 8, 62}; 63 64enum { 65 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83, 66 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f, 67 MLX4_IB_LINK_TYPE_IB = 0, 68 MLX4_IB_LINK_TYPE_ETH = 1 69}; 70 71enum { 72 /* 73 * Largest possible UD header: send with GRH and immediate 74 * data plus 18 bytes for an Ethernet header with VLAN/802.1Q 75 * tag. (LRH would only use 8 bytes, so Ethernet is the 76 * biggest case) 77 */ 78 MLX4_IB_UD_HEADER_SIZE = 82, 79 MLX4_IB_LSO_HEADER_SPARE = 128, 80}; 81 82enum { 83 MLX4_IB_IBOE_ETHERTYPE = 0x8915 84}; 85 86struct mlx4_ib_sqp { 87 struct mlx4_ib_qp qp; 88 int pkey_index; 89 u32 qkey; 90 u32 send_psn; 91 struct ib_ud_header ud_header; 92 u8 header_buf[MLX4_IB_UD_HEADER_SIZE]; 93 struct ib_qp *roce_v2_gsi; 94}; 95 96enum { 97 MLX4_IB_MIN_SQ_STRIDE = 6, 98 MLX4_IB_CACHE_LINE_SIZE = 64, 99}; 100 101enum { 102 MLX4_RAW_QP_MTU = 7, 103 MLX4_RAW_QP_MSGMAX = 31, 104}; 105 106#ifndef ETH_ALEN 107#define ETH_ALEN 6 108#endif 109 110static const __be32 mlx4_ib_opcode[] = { 111 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND), 112 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO), 113 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM), 114 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE), 115 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM), 116 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ), 117 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS), 118 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA), 119 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL), 120 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL), 121 [IB_WR_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR), 122 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS), 123 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA), 124}; 125 126static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp) 127{ 128 return container_of(mqp, struct mlx4_ib_sqp, qp); 129} 130 131static 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 141static 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.qp0_proxy[i] || 156 qp->mqp.qpn == dev->dev->caps.qp1_proxy[i]) { 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 */ 169static 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.qp0_proxy[i]) { 184 proxy_qp0 = 1; 185 break; 186 } 187 } 188 } 189 return proxy_qp0; 190} 191 192static void *get_wqe(struct mlx4_ib_qp *qp, int offset) 193{ 194 return mlx4_buf_offset(&qp->buf, offset); 195} 196 197static 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 202static 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 210 * 0x7FFFFFF | (invalid_ownership_value << 31). 211 * 212 * When the max work request size is less than or equal to the WQE 213 * basic block size, as an optimization, we can stamp all WQEs with 214 * 0xffffffff, and skip the very first chunk of each WQE. 215 */ 216static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size) 217{ 218 __be32 *wqe; 219 int i; 220 int s; 221 int ind; 222 void *buf; 223 __be32 stamp; 224 struct mlx4_wqe_ctrl_seg *ctrl; 225 226 if (qp->sq_max_wqes_per_wr > 1) { 227 s = roundup(size, 1U << qp->sq.wqe_shift); 228 for (i = 0; i < s; i += 64) { 229 ind = (i >> qp->sq.wqe_shift) + n; 230 stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) : 231 cpu_to_be32(0xffffffff); 232 buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1)); 233 wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1)); 234 *wqe = stamp; 235 } 236 } else { 237 ctrl = buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1)); 238 s = (ctrl->fence_size & 0x3f) << 4; 239 for (i = 64; i < s; i += 64) { 240 wqe = buf + i; 241 *wqe = cpu_to_be32(0xffffffff); 242 } 243 } 244} 245 246static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size) 247{ 248 struct mlx4_wqe_ctrl_seg *ctrl; 249 struct mlx4_wqe_inline_seg *inl; 250 void *wqe; 251 int s; 252 253 ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1)); 254 s = sizeof(struct mlx4_wqe_ctrl_seg); 255 256 if (qp->ibqp.qp_type == IB_QPT_UD) { 257 struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl; 258 struct mlx4_av *av = (struct mlx4_av *)dgram->av; 259 memset(dgram, 0, sizeof *dgram); 260 av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn); 261 s += sizeof(struct mlx4_wqe_datagram_seg); 262 } 263 264 /* Pad the remainder of the WQE with an inline data segment. */ 265 if (size > s) { 266 inl = wqe + s; 267 inl->byte_count = cpu_to_be32(1U << 31 | (size - s - sizeof *inl)); 268 } 269 ctrl->srcrb_flags = 0; 270 ctrl->fence_size = size / 16; 271 /* 272 * Make sure descriptor is fully written before setting ownership bit 273 * (because HW can start executing as soon as we do). 274 */ 275 wmb(); 276 277 ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) | 278 (n & qp->sq.wqe_cnt ? cpu_to_be32(1U << 31) : 0); 279 280 stamp_send_wqe(qp, n + qp->sq_spare_wqes, size); 281} 282 283/* Post NOP WQE to prevent wrap-around in the middle of WR */ 284static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind) 285{ 286 unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1)); 287 if (unlikely(s < qp->sq_max_wqes_per_wr)) { 288 post_nop_wqe(qp, ind, s << qp->sq.wqe_shift); 289 ind += s; 290 } 291 return ind; 292} 293 294static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type) 295{ 296 struct ib_event event; 297 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp; 298 299 if (type == MLX4_EVENT_TYPE_PATH_MIG) 300 to_mibqp(qp)->port = to_mibqp(qp)->alt_port; 301 302 if (ibqp->event_handler) { 303 event.device = ibqp->device; 304 event.element.qp = ibqp; 305 switch (type) { 306 case MLX4_EVENT_TYPE_PATH_MIG: 307 event.event = IB_EVENT_PATH_MIG; 308 break; 309 case MLX4_EVENT_TYPE_COMM_EST: 310 event.event = IB_EVENT_COMM_EST; 311 break; 312 case MLX4_EVENT_TYPE_SQ_DRAINED: 313 event.event = IB_EVENT_SQ_DRAINED; 314 break; 315 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE: 316 event.event = IB_EVENT_QP_LAST_WQE_REACHED; 317 break; 318 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR: 319 event.event = IB_EVENT_QP_FATAL; 320 break; 321 case MLX4_EVENT_TYPE_PATH_MIG_FAILED: 322 event.event = IB_EVENT_PATH_MIG_ERR; 323 break; 324 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR: 325 event.event = IB_EVENT_QP_REQ_ERR; 326 break; 327 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR: 328 event.event = IB_EVENT_QP_ACCESS_ERR; 329 break; 330 default: 331 pr_warn("Unexpected event type %d " 332 "on QP %06x\n", type, qp->qpn); 333 return; 334 } 335 336 ibqp->event_handler(&event, ibqp->qp_context); 337 } 338} 339 340static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags) 341{ 342 /* 343 * UD WQEs must have a datagram segment. 344 * RC and UC WQEs might have a remote address segment. 345 * MLX WQEs need two extra inline data segments (for the UD 346 * header and space for the ICRC). 347 */ 348 switch (type) { 349 case MLX4_IB_QPT_UD: 350 return sizeof (struct mlx4_wqe_ctrl_seg) + 351 sizeof (struct mlx4_wqe_datagram_seg) + 352 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0); 353 case MLX4_IB_QPT_PROXY_SMI_OWNER: 354 case MLX4_IB_QPT_PROXY_SMI: 355 case MLX4_IB_QPT_PROXY_GSI: 356 return sizeof (struct mlx4_wqe_ctrl_seg) + 357 sizeof (struct mlx4_wqe_datagram_seg) + 64; 358 case MLX4_IB_QPT_TUN_SMI_OWNER: 359 case MLX4_IB_QPT_TUN_GSI: 360 return sizeof (struct mlx4_wqe_ctrl_seg) + 361 sizeof (struct mlx4_wqe_datagram_seg); 362 363 case MLX4_IB_QPT_UC: 364 return sizeof (struct mlx4_wqe_ctrl_seg) + 365 sizeof (struct mlx4_wqe_raddr_seg); 366 case MLX4_IB_QPT_RC: 367 return sizeof (struct mlx4_wqe_ctrl_seg) + 368 sizeof (struct mlx4_wqe_masked_atomic_seg) + 369 sizeof (struct mlx4_wqe_raddr_seg); 370 case MLX4_IB_QPT_SMI: 371 case MLX4_IB_QPT_GSI: 372 return sizeof (struct mlx4_wqe_ctrl_seg) + 373 ALIGN(MLX4_IB_UD_HEADER_SIZE + 374 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE, 375 MLX4_INLINE_ALIGN) * 376 sizeof (struct mlx4_wqe_inline_seg), 377 sizeof (struct mlx4_wqe_data_seg)) + 378 ALIGN(4 + 379 sizeof (struct mlx4_wqe_inline_seg), 380 sizeof (struct mlx4_wqe_data_seg)); 381 default: 382 return sizeof (struct mlx4_wqe_ctrl_seg); 383 } 384} 385 386static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, 387 int is_user, int has_rq, struct mlx4_ib_qp *qp) 388{ 389 /* Sanity check RQ size before proceeding */ 390 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE || 391 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg)) 392 return -EINVAL; 393 394 if (!has_rq) { 395 if (cap->max_recv_wr) 396 return -EINVAL; 397 398 qp->rq.wqe_cnt = qp->rq.max_gs = 0; 399 } else { 400 /* HW requires >= 1 RQ entry with >= 1 gather entry */ 401 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge)) 402 return -EINVAL; 403 404 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr)); 405 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge)); 406 qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg)); 407 } 408 409 /* leave userspace return values as they were, so as not to break ABI */ 410 if (is_user) { 411 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt; 412 cap->max_recv_sge = qp->rq.max_gs; 413 } else { 414 cap->max_recv_wr = qp->rq.max_post = 415 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt); 416 cap->max_recv_sge = min(qp->rq.max_gs, 417 min(dev->dev->caps.max_sq_sg, 418 dev->dev->caps.max_rq_sg)); 419 } 420 421 return 0; 422} 423 424static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, 425 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp, 426 bool shrink_wqe) 427{ 428 int s; 429 430 /* Sanity check SQ size before proceeding */ 431 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) || 432 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) || 433 cap->max_inline_data + send_wqe_overhead(type, qp->flags) + 434 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz) 435 return -EINVAL; 436 437 /* 438 * For MLX transport we need 2 extra S/G entries: 439 * one for the header and one for the checksum at the end 440 */ 441 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI || 442 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) && 443 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg) 444 return -EINVAL; 445 446 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg), 447 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) + 448 send_wqe_overhead(type, qp->flags); 449 450 if (s > dev->dev->caps.max_sq_desc_sz) 451 return -EINVAL; 452 453 /* 454 * Hermon supports shrinking WQEs, such that a single work 455 * request can include multiple units of 1 << wqe_shift. This 456 * way, work requests can differ in size, and do not have to 457 * be a power of 2 in size, saving memory and speeding up send 458 * WR posting. Unfortunately, if we do this then the 459 * wqe_index field in CQEs can't be used to look up the WR ID 460 * anymore, so we do this only if selective signaling is off. 461 * 462 * Further, on 32-bit platforms, we can't use vmap() to make 463 * the QP buffer virtually contiguous. Thus we have to use 464 * constant-sized WRs to make sure a WR is always fully within 465 * a single page-sized chunk. 466 * 467 * Finally, we use NOP work requests to pad the end of the 468 * work queue, to avoid wrap-around in the middle of WR. We 469 * set NEC bit to avoid getting completions with error for 470 * these NOP WRs, but since NEC is only supported starting 471 * with firmware 2.2.232, we use constant-sized WRs for older 472 * firmware. 473 * 474 * And, since MLX QPs only support SEND, we use constant-sized 475 * WRs in this case. 476 * 477 * We look for the smallest value of wqe_shift such that the 478 * resulting number of wqes does not exceed device 479 * capabilities. 480 * 481 * We set WQE size to at least 64 bytes, this way stamping 482 * invalidates each WQE. 483 */ 484 if (shrink_wqe && dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC && 485 qp->sq_signal_bits && BITS_PER_LONG == 64 && 486 type != MLX4_IB_QPT_SMI && type != MLX4_IB_QPT_GSI && 487 !(type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_PROXY_SMI | 488 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) 489 qp->sq.wqe_shift = ilog2(64); 490 else 491 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s)); 492 493 for (;;) { 494 qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift); 495 496 /* 497 * We need to leave 2 KB + 1 WR of headroom in the SQ to 498 * allow HW to prefetch. 499 */ 500 qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr; 501 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr * 502 qp->sq_max_wqes_per_wr + 503 qp->sq_spare_wqes); 504 505 if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes) 506 break; 507 508 if (qp->sq_max_wqes_per_wr <= 1) 509 return -EINVAL; 510 511 ++qp->sq.wqe_shift; 512 } 513 514 qp->sq.max_gs = (min(dev->dev->caps.max_sq_desc_sz, 515 (qp->sq_max_wqes_per_wr << qp->sq.wqe_shift)) - 516 send_wqe_overhead(type, qp->flags)) / 517 sizeof (struct mlx4_wqe_data_seg); 518 519 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + 520 (qp->sq.wqe_cnt << qp->sq.wqe_shift); 521 if (qp->rq.wqe_shift > qp->sq.wqe_shift) { 522 qp->rq.offset = 0; 523 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift; 524 } else { 525 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift; 526 qp->sq.offset = 0; 527 } 528 529 cap->max_send_wr = qp->sq.max_post = 530 (qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr; 531 cap->max_send_sge = min(qp->sq.max_gs, 532 min(dev->dev->caps.max_sq_sg, 533 dev->dev->caps.max_rq_sg)); 534 /* We don't support inline sends for kernel QPs (yet) */ 535 cap->max_inline_data = 0; 536 537 return 0; 538} 539 540static int set_user_sq_size(struct mlx4_ib_dev *dev, 541 struct mlx4_ib_qp *qp, 542 struct mlx4_ib_create_qp *ucmd) 543{ 544 /* Sanity check SQ size before proceeding */ 545 if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes || 546 ucmd->log_sq_stride > 547 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) || 548 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE) 549 return -EINVAL; 550 551 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count; 552 qp->sq.wqe_shift = ucmd->log_sq_stride; 553 554 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + 555 (qp->sq.wqe_cnt << qp->sq.wqe_shift); 556 557 return 0; 558} 559 560static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp) 561{ 562 int i; 563 564 qp->sqp_proxy_rcv = 565 kmalloc(sizeof (struct mlx4_ib_buf) * qp->rq.wqe_cnt, 566 GFP_KERNEL); 567 if (!qp->sqp_proxy_rcv) 568 return -ENOMEM; 569 for (i = 0; i < qp->rq.wqe_cnt; i++) { 570 qp->sqp_proxy_rcv[i].addr = 571 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr), 572 GFP_KERNEL); 573 if (!qp->sqp_proxy_rcv[i].addr) 574 goto err; 575 qp->sqp_proxy_rcv[i].map = 576 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr, 577 sizeof (struct mlx4_ib_proxy_sqp_hdr), 578 DMA_FROM_DEVICE); 579 if (ib_dma_mapping_error(dev, qp->sqp_proxy_rcv[i].map)) { 580 kfree(qp->sqp_proxy_rcv[i].addr); 581 goto err; 582 } 583 } 584 return 0; 585 586err: 587 while (i > 0) { 588 --i; 589 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map, 590 sizeof (struct mlx4_ib_proxy_sqp_hdr), 591 DMA_FROM_DEVICE); 592 kfree(qp->sqp_proxy_rcv[i].addr); 593 } 594 kfree(qp->sqp_proxy_rcv); 595 qp->sqp_proxy_rcv = NULL; 596 return -ENOMEM; 597} 598 599static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp) 600{ 601 int i; 602 603 for (i = 0; i < qp->rq.wqe_cnt; i++) { 604 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map, 605 sizeof (struct mlx4_ib_proxy_sqp_hdr), 606 DMA_FROM_DEVICE); 607 kfree(qp->sqp_proxy_rcv[i].addr); 608 } 609 kfree(qp->sqp_proxy_rcv); 610} 611 612static int qp_has_rq(struct ib_qp_init_attr *attr) 613{ 614 if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT) 615 return 0; 616 617 return !attr->srq; 618} 619 620static int qp0_enabled_vf(struct mlx4_dev *dev, int qpn) 621{ 622 int i; 623 for (i = 0; i < dev->caps.num_ports; i++) { 624 if (qpn == dev->caps.qp0_proxy[i]) 625 return !!dev->caps.qp0_qkey[i]; 626 } 627 return 0; 628} 629 630static void mlx4_ib_free_qp_counter(struct mlx4_ib_dev *dev, 631 struct mlx4_ib_qp *qp) 632{ 633 mutex_lock(&dev->counters_table[qp->port - 1].mutex); 634 mlx4_counter_free(dev->dev, qp->counter_index->index); 635 list_del(&qp->counter_index->list); 636 mutex_unlock(&dev->counters_table[qp->port - 1].mutex); 637 638 kfree(qp->counter_index); 639 qp->counter_index = NULL; 640} 641 642static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd, 643 struct ib_qp_init_attr *init_attr, 644 struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp, 645 gfp_t gfp) 646{ 647 int qpn; 648 int err; 649 struct ib_qp_cap backup_cap; 650 struct mlx4_ib_sqp *sqp; 651 struct mlx4_ib_qp *qp; 652 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type; 653 struct mlx4_ib_cq *mcq; 654 unsigned long flags; 655 656 /* When tunneling special qps, we use a plain UD qp */ 657 if (sqpn) { 658 if (mlx4_is_mfunc(dev->dev) && 659 (!mlx4_is_master(dev->dev) || 660 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) { 661 if (init_attr->qp_type == IB_QPT_GSI) 662 qp_type = MLX4_IB_QPT_PROXY_GSI; 663 else { 664 if (mlx4_is_master(dev->dev) || 665 qp0_enabled_vf(dev->dev, sqpn)) 666 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER; 667 else 668 qp_type = MLX4_IB_QPT_PROXY_SMI; 669 } 670 } 671 qpn = sqpn; 672 /* add extra sg entry for tunneling */ 673 init_attr->cap.max_recv_sge++; 674 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) { 675 struct mlx4_ib_qp_tunnel_init_attr *tnl_init = 676 container_of(init_attr, 677 struct mlx4_ib_qp_tunnel_init_attr, init_attr); 678 if ((tnl_init->proxy_qp_type != IB_QPT_SMI && 679 tnl_init->proxy_qp_type != IB_QPT_GSI) || 680 !mlx4_is_master(dev->dev)) 681 return -EINVAL; 682 if (tnl_init->proxy_qp_type == IB_QPT_GSI) 683 qp_type = MLX4_IB_QPT_TUN_GSI; 684 else if (tnl_init->slave == mlx4_master_func_num(dev->dev) || 685 mlx4_vf_smi_enabled(dev->dev, tnl_init->slave, 686 tnl_init->port)) 687 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER; 688 else 689 qp_type = MLX4_IB_QPT_TUN_SMI; 690 /* we are definitely in the PPF here, since we are creating 691 * tunnel QPs. base_tunnel_sqpn is therefore valid. */ 692 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave 693 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1; 694 sqpn = qpn; 695 } 696 697 if (!*caller_qp) { 698 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI || 699 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER | 700 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) { 701 sqp = kzalloc(sizeof (struct mlx4_ib_sqp), gfp); 702 if (!sqp) 703 return -ENOMEM; 704 qp = &sqp->qp; 705 qp->pri.vid = 0xFFFF; 706 qp->alt.vid = 0xFFFF; 707 } else { 708 qp = kzalloc(sizeof (struct mlx4_ib_qp), gfp); 709 if (!qp) 710 return -ENOMEM; 711 qp->pri.vid = 0xFFFF; 712 qp->alt.vid = 0xFFFF; 713 } 714 } else 715 qp = *caller_qp; 716 717 qp->mlx4_ib_qp_type = qp_type; 718 719 mutex_init(&qp->mutex); 720 spin_lock_init(&qp->sq.lock); 721 spin_lock_init(&qp->rq.lock); 722 INIT_LIST_HEAD(&qp->gid_list); 723 INIT_LIST_HEAD(&qp->steering_rules); 724 725 qp->state = IB_QPS_RESET; 726 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) 727 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); 728 729 err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, qp_has_rq(init_attr), qp); 730 if (err) 731 goto err; 732 733 if (pd->uobject) { 734 struct mlx4_ib_create_qp ucmd; 735 736 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { 737 err = -EFAULT; 738 goto err; 739 } 740 741 qp->sq_no_prefetch = ucmd.sq_no_prefetch; 742 743 err = set_user_sq_size(dev, qp, &ucmd); 744 if (err) 745 goto err; 746 747 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, 748 qp->buf_size, 0, 0); 749 if (IS_ERR(qp->umem)) { 750 err = PTR_ERR(qp->umem); 751 goto err; 752 } 753 754 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem), 755 ilog2(qp->umem->page_size), &qp->mtt); 756 if (err) 757 goto err_buf; 758 759 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem); 760 if (err) 761 goto err_mtt; 762 763 if (qp_has_rq(init_attr)) { 764 err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context), 765 ucmd.db_addr, &qp->db); 766 if (err) 767 goto err_mtt; 768 } 769 } else { 770 qp->sq_no_prefetch = 0; 771 772 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO) 773 qp->flags |= MLX4_IB_QP_LSO; 774 775 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) { 776 if (dev->steering_support == 777 MLX4_STEERING_MODE_DEVICE_MANAGED) 778 qp->flags |= MLX4_IB_QP_NETIF; 779 else 780 goto err; 781 } 782 783 memcpy(&backup_cap, &init_attr->cap, sizeof(backup_cap)); 784 err = set_kernel_sq_size(dev, &init_attr->cap, 785 qp_type, qp, true); 786 if (err) 787 goto err; 788 789 if (qp_has_rq(init_attr)) { 790 err = mlx4_db_alloc(dev->dev, &qp->db, 0, gfp); 791 if (err) 792 goto err; 793 794 *qp->db.db = 0; 795 } 796 797 if (mlx4_buf_alloc(dev->dev, qp->buf_size, qp->buf_size, 798 &qp->buf, gfp)) { 799 memcpy(&init_attr->cap, &backup_cap, 800 sizeof(backup_cap)); 801 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, 802 qp, false); 803 if (err) 804 goto err_db; 805 806 if (mlx4_buf_alloc(dev->dev, qp->buf_size, 807 PAGE_SIZE * 2, &qp->buf, gfp)) { 808 err = -ENOMEM; 809 goto err_db; 810 } 811 } 812 813 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift, 814 &qp->mtt); 815 if (err) 816 goto err_buf; 817 818 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf, gfp); 819 if (err) 820 goto err_mtt; 821 822 qp->sq.wrid = kmalloc_array(qp->sq.wqe_cnt, sizeof(u64), 823 gfp | __GFP_NOWARN); 824 if (!qp->sq.wrid) 825 qp->sq.wrid = __vmalloc(qp->sq.wqe_cnt * sizeof(u64), 826 gfp, 0 /*PAGE_KERNEL*/); 827 qp->rq.wrid = kmalloc_array(qp->rq.wqe_cnt, sizeof(u64), 828 gfp | __GFP_NOWARN); 829 if (!qp->rq.wrid) 830 qp->rq.wrid = __vmalloc(qp->rq.wqe_cnt * sizeof(u64), 831 gfp, 0 /*PAGE_KERNEL*/); 832 if (!qp->sq.wrid || !qp->rq.wrid) { 833 err = -ENOMEM; 834 goto err_wrid; 835 } 836 } 837 838 if (sqpn) { 839 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 840 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) { 841 if (alloc_proxy_bufs(pd->device, qp)) { 842 err = -ENOMEM; 843 goto err_wrid; 844 } 845 } 846 } else { 847 /* Raw packet QPNs may not have bits 6,7 set in their qp_num; 848 * otherwise, the WQE BlueFlame setup flow wrongly causes 849 * VLAN insertion. */ 850 if (init_attr->qp_type == IB_QPT_RAW_PACKET) 851 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn, 852 (init_attr->cap.max_send_wr ? 853 MLX4_RESERVE_ETH_BF_QP : 0) | 854 (init_attr->cap.max_recv_wr ? 855 MLX4_RESERVE_A0_QP : 0)); 856 else 857 if (qp->flags & MLX4_IB_QP_NETIF) 858 err = mlx4_ib_steer_qp_alloc(dev, 1, &qpn); 859 else 860 err = mlx4_qp_reserve_range(dev->dev, 1, 1, 861 &qpn, 0); 862 if (err) 863 goto err_proxy; 864 } 865 866 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) 867 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK; 868 869 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp, gfp); 870 if (err) 871 goto err_qpn; 872 873 if (init_attr->qp_type == IB_QPT_XRC_TGT) 874 qp->mqp.qpn |= (1 << 23); 875 876 /* 877 * Hardware wants QPN written in big-endian order (after 878 * shifting) for send doorbell. Precompute this value to save 879 * a little bit when posting sends. 880 */ 881 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8); 882 883 qp->mqp.event = mlx4_ib_qp_event; 884 if (!*caller_qp) 885 *caller_qp = qp; 886 887 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags); 888 mlx4_ib_lock_cqs(to_mcq(init_attr->send_cq), 889 to_mcq(init_attr->recv_cq)); 890 /* Maintain device to QPs access, needed for further handling 891 * via reset flow 892 */ 893 list_add_tail(&qp->qps_list, &dev->qp_list); 894 /* Maintain CQ to QPs access, needed for further handling 895 * via reset flow 896 */ 897 mcq = to_mcq(init_attr->send_cq); 898 list_add_tail(&qp->cq_send_list, &mcq->send_qp_list); 899 mcq = to_mcq(init_attr->recv_cq); 900 list_add_tail(&qp->cq_recv_list, &mcq->recv_qp_list); 901 mlx4_ib_unlock_cqs(to_mcq(init_attr->send_cq), 902 to_mcq(init_attr->recv_cq)); 903 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags); 904 return 0; 905 906err_qpn: 907 if (!sqpn) { 908 if (qp->flags & MLX4_IB_QP_NETIF) 909 mlx4_ib_steer_qp_free(dev, qpn, 1); 910 else 911 mlx4_qp_release_range(dev->dev, qpn, 1); 912 } 913err_proxy: 914 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI) 915 free_proxy_bufs(pd->device, qp); 916err_wrid: 917 if (pd->uobject) { 918 if (qp_has_rq(init_attr)) 919 mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db); 920 } else { 921 kvfree(qp->sq.wrid); 922 kvfree(qp->rq.wrid); 923 } 924 925err_mtt: 926 mlx4_mtt_cleanup(dev->dev, &qp->mtt); 927 928err_buf: 929 if (pd->uobject) 930 ib_umem_release(qp->umem); 931 else 932 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); 933 934err_db: 935 if (!pd->uobject && qp_has_rq(init_attr)) 936 mlx4_db_free(dev->dev, &qp->db); 937 938err: 939 if (!*caller_qp) 940 kfree(qp); 941 return err; 942} 943 944static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state) 945{ 946 switch (state) { 947 case IB_QPS_RESET: return MLX4_QP_STATE_RST; 948 case IB_QPS_INIT: return MLX4_QP_STATE_INIT; 949 case IB_QPS_RTR: return MLX4_QP_STATE_RTR; 950 case IB_QPS_RTS: return MLX4_QP_STATE_RTS; 951 case IB_QPS_SQD: return MLX4_QP_STATE_SQD; 952 case IB_QPS_SQE: return MLX4_QP_STATE_SQER; 953 case IB_QPS_ERR: return MLX4_QP_STATE_ERR; 954 default: return -1; 955 } 956} 957 958static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) 959 __acquires(&send_cq->lock) __acquires(&recv_cq->lock) 960{ 961 if (send_cq == recv_cq) { 962 spin_lock(&send_cq->lock); 963 __acquire(&recv_cq->lock); 964 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { 965 spin_lock(&send_cq->lock); 966 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING); 967 } else { 968 spin_lock(&recv_cq->lock); 969 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING); 970 } 971} 972 973static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) 974 __releases(&send_cq->lock) __releases(&recv_cq->lock) 975{ 976 if (send_cq == recv_cq) { 977 __release(&recv_cq->lock); 978 spin_unlock(&send_cq->lock); 979 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { 980 spin_unlock(&recv_cq->lock); 981 spin_unlock(&send_cq->lock); 982 } else { 983 spin_unlock(&send_cq->lock); 984 spin_unlock(&recv_cq->lock); 985 } 986} 987 988static void del_gid_entries(struct mlx4_ib_qp *qp) 989{ 990 struct mlx4_ib_gid_entry *ge, *tmp; 991 992 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) { 993 list_del(&ge->list); 994 kfree(ge); 995 } 996} 997 998static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp) 999{ 1000 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT) 1001 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd); 1002 else 1003 return to_mpd(qp->ibqp.pd); 1004} 1005 1006static void get_cqs(struct mlx4_ib_qp *qp, 1007 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq) 1008{ 1009 switch (qp->ibqp.qp_type) { 1010 case IB_QPT_XRC_TGT: 1011 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq); 1012 *recv_cq = *send_cq; 1013 break; 1014 case IB_QPT_XRC_INI: 1015 *send_cq = to_mcq(qp->ibqp.send_cq); 1016 *recv_cq = *send_cq; 1017 break; 1018 default: 1019 *send_cq = to_mcq(qp->ibqp.send_cq); 1020 *recv_cq = to_mcq(qp->ibqp.recv_cq); 1021 break; 1022 } 1023} 1024 1025static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, 1026 struct ib_udata *udata) 1027{ 1028 struct mlx4_ib_cq *send_cq, *recv_cq; 1029 unsigned long flags; 1030 1031 if (qp->state != IB_QPS_RESET) { 1032 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state), 1033 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp)) 1034 pr_warn("modify QP %06x to RESET failed.\n", 1035 qp->mqp.qpn); 1036 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) { 1037 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 1038 qp->pri.smac = 0; 1039 qp->pri.smac_port = 0; 1040 } 1041 if (qp->alt.smac) { 1042 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 1043 qp->alt.smac = 0; 1044 } 1045 if (qp->pri.vid < 0x1000) { 1046 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid); 1047 qp->pri.vid = 0xFFFF; 1048 qp->pri.candidate_vid = 0xFFFF; 1049 qp->pri.update_vid = 0; 1050 } 1051 if (qp->alt.vid < 0x1000) { 1052 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid); 1053 qp->alt.vid = 0xFFFF; 1054 qp->alt.candidate_vid = 0xFFFF; 1055 qp->alt.update_vid = 0; 1056 } 1057 } 1058 1059 get_cqs(qp, &send_cq, &recv_cq); 1060 1061 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags); 1062 mlx4_ib_lock_cqs(send_cq, recv_cq); 1063 1064 /* del from lists under both locks above to protect reset flow paths */ 1065 list_del(&qp->qps_list); 1066 list_del(&qp->cq_send_list); 1067 list_del(&qp->cq_recv_list); 1068 if (!udata) { 1069 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn, 1070 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL); 1071 if (send_cq != recv_cq) 1072 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); 1073 } 1074 1075 mlx4_qp_remove(dev->dev, &qp->mqp); 1076 1077 mlx4_ib_unlock_cqs(send_cq, recv_cq); 1078 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags); 1079 1080 mlx4_qp_free(dev->dev, &qp->mqp); 1081 1082 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp)) { 1083 if (qp->flags & MLX4_IB_QP_NETIF) 1084 mlx4_ib_steer_qp_free(dev, qp->mqp.qpn, 1); 1085 else 1086 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1); 1087 } 1088 1089 mlx4_mtt_cleanup(dev->dev, &qp->mtt); 1090 1091 if (udata) { 1092 if (qp->rq.wqe_cnt) { 1093 struct mlx4_ib_ucontext *mcontext = 1094 rdma_udata_to_drv_context( 1095 udata, 1096 struct mlx4_ib_ucontext, 1097 ibucontext); 1098 1099 mlx4_ib_db_unmap_user(mcontext, &qp->db); 1100 } 1101 } else { 1102 kvfree(qp->sq.wrid); 1103 kvfree(qp->rq.wrid); 1104 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 1105 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) 1106 free_proxy_bufs(&dev->ib_dev, qp); 1107 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); 1108 if (qp->rq.wqe_cnt) 1109 mlx4_db_free(dev->dev, &qp->db); 1110 } 1111 ib_umem_release(qp->umem); 1112 1113 del_gid_entries(qp); 1114} 1115 1116static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr) 1117{ 1118 /* Native or PPF */ 1119 if (!mlx4_is_mfunc(dev->dev) || 1120 (mlx4_is_master(dev->dev) && 1121 attr->create_flags & MLX4_IB_SRIOV_SQP)) { 1122 return dev->dev->phys_caps.base_sqpn + 1123 (attr->qp_type == IB_QPT_SMI ? 0 : 2) + 1124 attr->port_num - 1; 1125 } 1126 /* PF or VF -- creating proxies */ 1127 if (attr->qp_type == IB_QPT_SMI) 1128 return dev->dev->caps.qp0_proxy[attr->port_num - 1]; 1129 else 1130 return dev->dev->caps.qp1_proxy[attr->port_num - 1]; 1131} 1132 1133static struct ib_qp *_mlx4_ib_create_qp(struct ib_pd *pd, 1134 struct ib_qp_init_attr *init_attr, 1135 struct ib_udata *udata) 1136{ 1137 struct mlx4_ib_qp *qp = NULL; 1138 int err; 1139 int sup_u_create_flags = MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK; 1140 u16 xrcdn = 0; 1141 gfp_t gfp; 1142 1143 gfp = (init_attr->create_flags & MLX4_IB_QP_CREATE_USE_GFP_NOIO) ? 1144 GFP_NOIO : GFP_KERNEL; 1145 /* 1146 * We only support LSO, vendor flag1, and multicast loopback blocking, 1147 * and only for kernel UD QPs. 1148 */ 1149 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO | 1150 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK | 1151 MLX4_IB_SRIOV_TUNNEL_QP | 1152 MLX4_IB_SRIOV_SQP | 1153 MLX4_IB_QP_NETIF | 1154 MLX4_IB_QP_CREATE_ROCE_V2_GSI | 1155 MLX4_IB_QP_CREATE_USE_GFP_NOIO)) 1156 return ERR_PTR(-EINVAL); 1157 1158 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) { 1159 if (init_attr->qp_type != IB_QPT_UD) 1160 return ERR_PTR(-EINVAL); 1161 } 1162 1163 if (init_attr->create_flags) { 1164 if (udata && init_attr->create_flags & ~(sup_u_create_flags)) 1165 return ERR_PTR(-EINVAL); 1166 1167 if ((init_attr->create_flags & ~(MLX4_IB_SRIOV_SQP | 1168 MLX4_IB_QP_CREATE_USE_GFP_NOIO | 1169 MLX4_IB_QP_CREATE_ROCE_V2_GSI | 1170 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) && 1171 init_attr->qp_type != IB_QPT_UD) || 1172 (init_attr->create_flags & MLX4_IB_SRIOV_SQP && 1173 init_attr->qp_type > IB_QPT_GSI) || 1174 (init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI && 1175 init_attr->qp_type != IB_QPT_GSI)) 1176 return ERR_PTR(-EINVAL); 1177 } 1178 1179 switch (init_attr->qp_type) { 1180 case IB_QPT_XRC_TGT: 1181 pd = to_mxrcd(init_attr->xrcd)->pd; 1182 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn; 1183 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq; 1184 /* fall through */ 1185 case IB_QPT_XRC_INI: 1186 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC)) 1187 return ERR_PTR(-ENOSYS); 1188 init_attr->recv_cq = init_attr->send_cq; 1189 /* fall through */ 1190 case IB_QPT_RC: 1191 case IB_QPT_UC: 1192 case IB_QPT_RAW_PACKET: 1193 qp = kzalloc(sizeof *qp, gfp); 1194 if (!qp) 1195 return ERR_PTR(-ENOMEM); 1196 qp->pri.vid = 0xFFFF; 1197 qp->alt.vid = 0xFFFF; 1198 /* fall through */ 1199 case IB_QPT_UD: 1200 { 1201 err = create_qp_common(to_mdev(pd->device), pd, init_attr, 1202 udata, 0, &qp, gfp); 1203 if (err) { 1204 kfree(qp); 1205 return ERR_PTR(err); 1206 } 1207 1208 qp->ibqp.qp_num = qp->mqp.qpn; 1209 qp->xrcdn = xrcdn; 1210 1211 break; 1212 } 1213 case IB_QPT_SMI: 1214 case IB_QPT_GSI: 1215 { 1216 int sqpn; 1217 1218 /* Userspace is not allowed to create special QPs: */ 1219 if (udata) 1220 return ERR_PTR(-EINVAL); 1221 if (init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI) { 1222 int res = mlx4_qp_reserve_range(to_mdev(pd->device)->dev, 1, 1, &sqpn, 0); 1223 1224 if (res) 1225 return ERR_PTR(res); 1226 } else { 1227 sqpn = get_sqp_num(to_mdev(pd->device), init_attr); 1228 } 1229 1230 err = create_qp_common(to_mdev(pd->device), pd, init_attr, udata, 1231 sqpn, 1232 &qp, gfp); 1233 if (err) 1234 return ERR_PTR(err); 1235 1236 qp->port = init_attr->port_num; 1237 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1238 init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI ? sqpn : 1; 1239 break; 1240 } 1241 default: 1242 /* Don't support raw QPs */ 1243 return ERR_PTR(-EINVAL); 1244 } 1245 1246 return &qp->ibqp; 1247} 1248 1249struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd, 1250 struct ib_qp_init_attr *init_attr, 1251 struct ib_udata *udata) { 1252 struct ib_device *device = pd ? pd->device : init_attr->xrcd->device; 1253 struct ib_qp *ibqp; 1254 struct mlx4_ib_dev *dev = to_mdev(device); 1255 1256 ibqp = _mlx4_ib_create_qp(pd, init_attr, udata); 1257 1258 if (!IS_ERR(ibqp) && 1259 (init_attr->qp_type == IB_QPT_GSI) && 1260 !(init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI)) { 1261 struct mlx4_ib_sqp *sqp = to_msqp((to_mqp(ibqp))); 1262 int is_eth = rdma_cap_eth_ah(&dev->ib_dev, init_attr->port_num); 1263 1264 if (is_eth && 1265 dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2) { 1266 init_attr->create_flags |= MLX4_IB_QP_CREATE_ROCE_V2_GSI; 1267 sqp->roce_v2_gsi = ib_create_qp(pd, init_attr); 1268 1269 if (IS_ERR(sqp->roce_v2_gsi)) { 1270 pr_err("Failed to create GSI QP for RoCEv2 (%ld)\n", PTR_ERR(sqp->roce_v2_gsi)); 1271 sqp->roce_v2_gsi = NULL; 1272 } else { 1273 sqp = to_msqp(to_mqp(sqp->roce_v2_gsi)); 1274 sqp->qp.flags |= MLX4_IB_ROCE_V2_GSI_QP; 1275 } 1276 1277 init_attr->create_flags &= ~MLX4_IB_QP_CREATE_ROCE_V2_GSI; 1278 } 1279 } 1280 return ibqp; 1281} 1282 1283static int _mlx4_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 1284{ 1285 struct mlx4_ib_dev *dev = to_mdev(qp->device); 1286 struct mlx4_ib_qp *mqp = to_mqp(qp); 1287 1288 if (is_qp0(dev, mqp)) 1289 mlx4_CLOSE_PORT(dev->dev, mqp->port); 1290 1291 if (dev->qp1_proxy[mqp->port - 1] == mqp) { 1292 mutex_lock(&dev->qp1_proxy_lock[mqp->port - 1]); 1293 dev->qp1_proxy[mqp->port - 1] = NULL; 1294 mutex_unlock(&dev->qp1_proxy_lock[mqp->port - 1]); 1295 } 1296 1297 if (mqp->counter_index) 1298 mlx4_ib_free_qp_counter(dev, mqp); 1299 1300 destroy_qp_common(dev, mqp, udata); 1301 1302 if (is_sqp(dev, mqp)) 1303 kfree(to_msqp(mqp)); 1304 else 1305 kfree(mqp); 1306 1307 return 0; 1308} 1309 1310int mlx4_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) 1311{ 1312 struct mlx4_ib_qp *mqp = to_mqp(qp); 1313 1314 if (mqp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) { 1315 struct mlx4_ib_sqp *sqp = to_msqp(mqp); 1316 1317 if (sqp->roce_v2_gsi) 1318 ib_destroy_qp(sqp->roce_v2_gsi); 1319 } 1320 1321 return _mlx4_ib_destroy_qp(qp, udata); 1322} 1323 1324static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type) 1325{ 1326 switch (type) { 1327 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC; 1328 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC; 1329 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD; 1330 case MLX4_IB_QPT_XRC_INI: 1331 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC; 1332 case MLX4_IB_QPT_SMI: 1333 case MLX4_IB_QPT_GSI: 1334 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX; 1335 1336 case MLX4_IB_QPT_PROXY_SMI_OWNER: 1337 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ? 1338 MLX4_QP_ST_MLX : -1); 1339 case MLX4_IB_QPT_PROXY_SMI: 1340 case MLX4_IB_QPT_TUN_SMI: 1341 case MLX4_IB_QPT_PROXY_GSI: 1342 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ? 1343 MLX4_QP_ST_UD : -1); 1344 default: return -1; 1345 } 1346} 1347 1348static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr, 1349 int attr_mask) 1350{ 1351 u8 dest_rd_atomic; 1352 u32 access_flags; 1353 u32 hw_access_flags = 0; 1354 1355 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1356 dest_rd_atomic = attr->max_dest_rd_atomic; 1357 else 1358 dest_rd_atomic = qp->resp_depth; 1359 1360 if (attr_mask & IB_QP_ACCESS_FLAGS) 1361 access_flags = attr->qp_access_flags; 1362 else 1363 access_flags = qp->atomic_rd_en; 1364 1365 if (!dest_rd_atomic) 1366 access_flags &= IB_ACCESS_REMOTE_WRITE; 1367 1368 if (access_flags & IB_ACCESS_REMOTE_READ) 1369 hw_access_flags |= MLX4_QP_BIT_RRE; 1370 if (access_flags & IB_ACCESS_REMOTE_ATOMIC) 1371 hw_access_flags |= MLX4_QP_BIT_RAE; 1372 if (access_flags & IB_ACCESS_REMOTE_WRITE) 1373 hw_access_flags |= MLX4_QP_BIT_RWE; 1374 1375 return cpu_to_be32(hw_access_flags); 1376} 1377 1378static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr, 1379 int attr_mask) 1380{ 1381 if (attr_mask & IB_QP_PKEY_INDEX) 1382 sqp->pkey_index = attr->pkey_index; 1383 if (attr_mask & IB_QP_QKEY) 1384 sqp->qkey = attr->qkey; 1385 if (attr_mask & IB_QP_SQ_PSN) 1386 sqp->send_psn = attr->sq_psn; 1387} 1388 1389static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port) 1390{ 1391 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6); 1392} 1393 1394static int _mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah, 1395 u64 smac, u16 vlan_tag, struct mlx4_qp_path *path, 1396 struct mlx4_roce_smac_vlan_info *smac_info, u8 port) 1397{ 1398 int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) == 1399 IB_LINK_LAYER_ETHERNET; 1400 int vidx; 1401 int smac_index; 1402 int err; 1403 1404 1405 path->grh_mylmc = ah->src_path_bits & 0x7f; 1406 path->rlid = cpu_to_be16(ah->dlid); 1407 if (ah->static_rate) { 1408 path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET; 1409 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && 1410 !(1 << path->static_rate & dev->dev->caps.stat_rate_support)) 1411 --path->static_rate; 1412 } else 1413 path->static_rate = 0; 1414 1415 if (ah->ah_flags & IB_AH_GRH) { 1416 int real_sgid_index = mlx4_ib_gid_index_to_real_index(dev, 1417 port, 1418 ah->grh.sgid_index); 1419 1420 if (real_sgid_index >= dev->dev->caps.gid_table_len[port]) { 1421 pr_err("sgid_index (%u) too large. max is %d\n", 1422 real_sgid_index, dev->dev->caps.gid_table_len[port] - 1); 1423 return -1; 1424 } 1425 1426 path->grh_mylmc |= 1 << 7; 1427 path->mgid_index = real_sgid_index; 1428 path->hop_limit = ah->grh.hop_limit; 1429 path->tclass_flowlabel = 1430 cpu_to_be32((ah->grh.traffic_class << 20) | 1431 (ah->grh.flow_label)); 1432 memcpy(path->rgid, ah->grh.dgid.raw, 16); 1433 } 1434 1435 if (is_eth) { 1436 if (!(ah->ah_flags & IB_AH_GRH)) 1437 return -1; 1438 1439 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | 1440 ((port - 1) << 6) | ((ah->sl & 7) << 3); 1441 1442 path->feup |= MLX4_FEUP_FORCE_ETH_UP; 1443 if (vlan_tag < 0x1000) { 1444 if (smac_info->vid < 0x1000) { 1445 /* both valid vlan ids */ 1446 if (smac_info->vid != vlan_tag) { 1447 /* different VIDs. unreg old and reg new */ 1448 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx); 1449 if (err) 1450 return err; 1451 smac_info->candidate_vid = vlan_tag; 1452 smac_info->candidate_vlan_index = vidx; 1453 smac_info->candidate_vlan_port = port; 1454 smac_info->update_vid = 1; 1455 path->vlan_index = vidx; 1456 } else { 1457 path->vlan_index = smac_info->vlan_index; 1458 } 1459 } else { 1460 /* no current vlan tag in qp */ 1461 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx); 1462 if (err) 1463 return err; 1464 smac_info->candidate_vid = vlan_tag; 1465 smac_info->candidate_vlan_index = vidx; 1466 smac_info->candidate_vlan_port = port; 1467 smac_info->update_vid = 1; 1468 path->vlan_index = vidx; 1469 } 1470 path->feup |= MLX4_FVL_FORCE_ETH_VLAN; 1471 path->fl = 1 << 6; 1472 } else { 1473 /* have current vlan tag. unregister it at modify-qp success */ 1474 if (smac_info->vid < 0x1000) { 1475 smac_info->candidate_vid = 0xFFFF; 1476 smac_info->update_vid = 1; 1477 } 1478 } 1479 1480 /* get smac_index for RoCE use. 1481 * If no smac was yet assigned, register one. 1482 * If one was already assigned, but the new mac differs, 1483 * unregister the old one and register the new one. 1484 */ 1485 if ((!smac_info->smac && !smac_info->smac_port) || 1486 smac_info->smac != smac) { 1487 /* register candidate now, unreg if needed, after success */ 1488 smac_index = mlx4_register_mac(dev->dev, port, smac); 1489 if (smac_index >= 0) { 1490 smac_info->candidate_smac_index = smac_index; 1491 smac_info->candidate_smac = smac; 1492 smac_info->candidate_smac_port = port; 1493 } else { 1494 return -EINVAL; 1495 } 1496 } else { 1497 smac_index = smac_info->smac_index; 1498 } 1499 1500 memcpy(path->dmac, ah->dmac, 6); 1501 path->ackto = MLX4_IB_LINK_TYPE_ETH; 1502 /* put MAC table smac index for IBoE */ 1503 path->grh_mylmc = (u8) (smac_index) | 0x80; 1504 } else { 1505 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | 1506 ((port - 1) << 6) | ((ah->sl & 0xf) << 2); 1507 } 1508 1509 return 0; 1510} 1511 1512static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_qp_attr *qp, 1513 enum ib_qp_attr_mask qp_attr_mask, 1514 struct mlx4_ib_qp *mqp, 1515 struct mlx4_qp_path *path, u8 port, 1516 u16 vlan_id, u8 *smac) 1517{ 1518 return _mlx4_set_path(dev, &qp->ah_attr, 1519 mlx4_mac_to_u64(smac), 1520 vlan_id, 1521 path, &mqp->pri, port); 1522} 1523 1524static int mlx4_set_alt_path(struct mlx4_ib_dev *dev, 1525 const struct ib_qp_attr *qp, 1526 enum ib_qp_attr_mask qp_attr_mask, 1527 struct mlx4_ib_qp *mqp, 1528 struct mlx4_qp_path *path, u8 port) 1529{ 1530 return _mlx4_set_path(dev, &qp->alt_ah_attr, 1531 0, 1532 0xffff, 1533 path, &mqp->alt, port); 1534} 1535 1536static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 1537{ 1538 struct mlx4_ib_gid_entry *ge, *tmp; 1539 1540 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) { 1541 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) { 1542 ge->added = 1; 1543 ge->port = qp->port; 1544 } 1545 } 1546} 1547 1548static int handle_eth_ud_smac_index(struct mlx4_ib_dev *dev, 1549 struct mlx4_ib_qp *qp, 1550 struct mlx4_qp_context *context) 1551{ 1552 u64 u64_mac; 1553 int smac_index; 1554 1555 u64_mac = atomic64_read(&dev->iboe.mac[qp->port - 1]); 1556 1557 context->pri_path.sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | ((qp->port - 1) << 6); 1558 if (!qp->pri.smac && !qp->pri.smac_port) { 1559 smac_index = mlx4_register_mac(dev->dev, qp->port, u64_mac); 1560 if (smac_index >= 0) { 1561 qp->pri.candidate_smac_index = smac_index; 1562 qp->pri.candidate_smac = u64_mac; 1563 qp->pri.candidate_smac_port = qp->port; 1564 context->pri_path.grh_mylmc = 0x80 | (u8) smac_index; 1565 } else { 1566 return -ENOENT; 1567 } 1568 } 1569 return 0; 1570} 1571 1572static int create_qp_lb_counter(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 1573{ 1574 struct counter_index *new_counter_index; 1575 int err; 1576 u32 tmp_idx; 1577 1578 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) != 1579 IB_LINK_LAYER_ETHERNET || 1580 !(qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) || 1581 !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_LB_SRC_CHK)) 1582 return 0; 1583 1584 err = mlx4_counter_alloc(dev->dev, &tmp_idx); 1585 if (err) 1586 return err; 1587 1588 new_counter_index = kmalloc(sizeof(*new_counter_index), GFP_KERNEL); 1589 if (!new_counter_index) { 1590 mlx4_counter_free(dev->dev, tmp_idx); 1591 return -ENOMEM; 1592 } 1593 1594 new_counter_index->index = tmp_idx; 1595 new_counter_index->allocated = 1; 1596 qp->counter_index = new_counter_index; 1597 1598 mutex_lock(&dev->counters_table[qp->port - 1].mutex); 1599 list_add_tail(&new_counter_index->list, 1600 &dev->counters_table[qp->port - 1].counters_list); 1601 mutex_unlock(&dev->counters_table[qp->port - 1].mutex); 1602 1603 return 0; 1604} 1605 1606enum { 1607 MLX4_QPC_ROCE_MODE_1 = 0, 1608 MLX4_QPC_ROCE_MODE_2 = 2, 1609 MLX4_QPC_ROCE_MODE_UNDEFINED = 0xff 1610}; 1611 1612static u8 gid_type_to_qpc(enum ib_gid_type gid_type) 1613{ 1614 switch (gid_type) { 1615 case IB_GID_TYPE_ROCE: 1616 return MLX4_QPC_ROCE_MODE_1; 1617 case IB_GID_TYPE_ROCE_UDP_ENCAP: 1618 return MLX4_QPC_ROCE_MODE_2; 1619 default: 1620 return MLX4_QPC_ROCE_MODE_UNDEFINED; 1621 } 1622} 1623 1624static int __mlx4_ib_modify_qp(struct ib_qp *ibqp, 1625 const struct ib_qp_attr *attr, int attr_mask, 1626 enum ib_qp_state cur_state, 1627 enum ib_qp_state new_state, 1628 struct ib_udata *udata) 1629{ 1630 struct mlx4_ib_dev *dev = to_mdev(ibqp->device); 1631 struct mlx4_ib_qp *qp = to_mqp(ibqp); 1632 struct mlx4_ib_pd *pd; 1633 struct mlx4_ib_cq *send_cq, *recv_cq; 1634 struct mlx4_ib_ucontext *ucontext = rdma_udata_to_drv_context( 1635 udata, struct mlx4_ib_ucontext, ibucontext); 1636 struct mlx4_qp_context *context; 1637 enum mlx4_qp_optpar optpar = 0; 1638 int sqd_event; 1639 int steer_qp = 0; 1640 int err = -EINVAL; 1641 int counter_index; 1642 1643 /* APM is not supported under RoCE */ 1644 if (attr_mask & IB_QP_ALT_PATH && 1645 rdma_port_get_link_layer(&dev->ib_dev, qp->port) == 1646 IB_LINK_LAYER_ETHERNET) 1647 return -ENOTSUPP; 1648 1649 context = kzalloc(sizeof *context, GFP_KERNEL); 1650 if (!context) 1651 return -ENOMEM; 1652 1653 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) | 1654 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16)); 1655 1656 if (!(attr_mask & IB_QP_PATH_MIG_STATE)) 1657 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); 1658 else { 1659 optpar |= MLX4_QP_OPTPAR_PM_STATE; 1660 switch (attr->path_mig_state) { 1661 case IB_MIG_MIGRATED: 1662 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); 1663 break; 1664 case IB_MIG_REARM: 1665 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11); 1666 break; 1667 case IB_MIG_ARMED: 1668 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11); 1669 break; 1670 } 1671 } 1672 1673 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) 1674 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11; 1675 else if (ibqp->qp_type == IB_QPT_RAW_PACKET) 1676 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX; 1677 else if (ibqp->qp_type == IB_QPT_UD) { 1678 if (qp->flags & MLX4_IB_QP_LSO) 1679 context->mtu_msgmax = (IB_MTU_4096 << 5) | 1680 ilog2(dev->dev->caps.max_gso_sz); 1681 else 1682 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12; 1683 } else if (attr_mask & IB_QP_PATH_MTU) { 1684 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) { 1685 pr_err("path MTU (%u) is invalid\n", 1686 attr->path_mtu); 1687 goto out; 1688 } 1689 context->mtu_msgmax = (attr->path_mtu << 5) | 1690 ilog2(dev->dev->caps.max_msg_sz); 1691 } 1692 1693 if (qp->rq.wqe_cnt) 1694 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3; 1695 context->rq_size_stride |= qp->rq.wqe_shift - 4; 1696 1697 if (qp->sq.wqe_cnt) 1698 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3; 1699 context->sq_size_stride |= qp->sq.wqe_shift - 4; 1700 1701 if (new_state == IB_QPS_RESET && qp->counter_index) 1702 mlx4_ib_free_qp_counter(dev, qp); 1703 1704 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) { 1705 context->sq_size_stride |= !!qp->sq_no_prefetch << 7; 1706 context->xrcd = cpu_to_be32((u32) qp->xrcdn); 1707 if (ibqp->qp_type == IB_QPT_RAW_PACKET) 1708 context->param3 |= cpu_to_be32(1 << 30); 1709 } 1710 1711 if (ucontext) 1712 context->usr_page = cpu_to_be32( 1713 mlx4_to_hw_uar_index(dev->dev, ucontext->uar.index)); 1714 else 1715 context->usr_page = cpu_to_be32( 1716 mlx4_to_hw_uar_index(dev->dev, dev->priv_uar.index)); 1717 1718 if (attr_mask & IB_QP_DEST_QPN) 1719 context->remote_qpn = cpu_to_be32(attr->dest_qp_num); 1720 1721 if (attr_mask & IB_QP_PORT) { 1722 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD && 1723 !(attr_mask & IB_QP_AV)) { 1724 mlx4_set_sched(&context->pri_path, attr->port_num); 1725 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE; 1726 } 1727 } 1728 1729 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) { 1730 err = create_qp_lb_counter(dev, qp); 1731 if (err) 1732 goto out; 1733 1734 counter_index = 1735 dev->counters_table[qp->port - 1].default_counter; 1736 if (qp->counter_index) 1737 counter_index = qp->counter_index->index; 1738 1739 if (counter_index != -1) { 1740 context->pri_path.counter_index = counter_index; 1741 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX; 1742 if (qp->counter_index) { 1743 context->pri_path.fl |= 1744 MLX4_FL_ETH_SRC_CHECK_MC_LB; 1745 context->pri_path.vlan_control |= 1746 MLX4_CTRL_ETH_SRC_CHECK_IF_COUNTER; 1747 } 1748 } else 1749 context->pri_path.counter_index = 1750 MLX4_SINK_COUNTER_INDEX(dev->dev); 1751 1752 if (qp->flags & MLX4_IB_QP_NETIF) { 1753 mlx4_ib_steer_qp_reg(dev, qp, 1); 1754 steer_qp = 1; 1755 } 1756 1757 if (ibqp->qp_type == IB_QPT_GSI) { 1758 enum ib_gid_type gid_type = qp->flags & MLX4_IB_ROCE_V2_GSI_QP ? 1759 IB_GID_TYPE_ROCE_UDP_ENCAP : IB_GID_TYPE_ROCE; 1760 u8 qpc_roce_mode = gid_type_to_qpc(gid_type); 1761 1762 context->rlkey_roce_mode |= (qpc_roce_mode << 6); 1763 } 1764 } 1765 1766 if (attr_mask & IB_QP_PKEY_INDEX) { 1767 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) 1768 context->pri_path.disable_pkey_check = 0x40; 1769 context->pri_path.pkey_index = attr->pkey_index; 1770 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX; 1771 } 1772 1773 if (attr_mask & IB_QP_AV) { 1774 u8 port_num = mlx4_is_bonded(to_mdev(ibqp->device)->dev) ? 1 : 1775 attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 1776 union ib_gid gid; 1777 struct ib_gid_attr gid_attr; 1778 u16 vlan = 0xffff; 1779 u8 smac[ETH_ALEN]; 1780 int status = 0; 1781 int is_eth = rdma_cap_eth_ah(&dev->ib_dev, port_num) && 1782 attr->ah_attr.ah_flags & IB_AH_GRH; 1783 1784 if (is_eth) { 1785 int index = attr->ah_attr.grh.sgid_index; 1786 1787 status = ib_get_cached_gid(ibqp->device, port_num, 1788 index, &gid, &gid_attr); 1789 if (!status && !memcmp(&gid, &zgid, sizeof(gid))) 1790 status = -ENOENT; 1791 if (!status && gid_attr.ndev) { 1792 vlan = rdma_vlan_dev_vlan_id(gid_attr.ndev); 1793 memcpy(smac, if_getlladdr(gid_attr.ndev), ETH_ALEN); 1794 if_rele(gid_attr.ndev); 1795 } 1796 } 1797 if (status) 1798 goto out; 1799 1800 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path, 1801 port_num, vlan, smac)) 1802 goto out; 1803 1804 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH | 1805 MLX4_QP_OPTPAR_SCHED_QUEUE); 1806 1807 if (is_eth && 1808 (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR)) { 1809 u8 qpc_roce_mode = gid_type_to_qpc(gid_attr.gid_type); 1810 1811 if (qpc_roce_mode == MLX4_QPC_ROCE_MODE_UNDEFINED) { 1812 err = -EINVAL; 1813 goto out; 1814 } 1815 context->rlkey_roce_mode |= (qpc_roce_mode << 6); 1816 } 1817 1818 } 1819 1820 if (attr_mask & IB_QP_TIMEOUT) { 1821 context->pri_path.ackto |= attr->timeout << 3; 1822 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT; 1823 } 1824 1825 if (attr_mask & IB_QP_ALT_PATH) { 1826 if (attr->alt_port_num == 0 || 1827 attr->alt_port_num > dev->dev->caps.num_ports) 1828 goto out; 1829 1830 if (attr->alt_pkey_index >= 1831 dev->dev->caps.pkey_table_len[attr->alt_port_num]) 1832 goto out; 1833 1834 if (mlx4_set_alt_path(dev, attr, attr_mask, qp, 1835 &context->alt_path, 1836 attr->alt_port_num)) 1837 goto out; 1838 1839 context->alt_path.pkey_index = attr->alt_pkey_index; 1840 context->alt_path.ackto = attr->alt_timeout << 3; 1841 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH; 1842 } 1843 1844 pd = get_pd(qp); 1845 get_cqs(qp, &send_cq, &recv_cq); 1846 context->pd = cpu_to_be32(pd->pdn); 1847 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn); 1848 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn); 1849 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28); 1850 1851 /* Set "fast registration enabled" for all kernel QPs */ 1852 if (!qp->ibqp.uobject) 1853 context->params1 |= cpu_to_be32(1 << 11); 1854 1855 if (attr_mask & IB_QP_RNR_RETRY) { 1856 context->params1 |= cpu_to_be32(attr->rnr_retry << 13); 1857 optpar |= MLX4_QP_OPTPAR_RNR_RETRY; 1858 } 1859 1860 if (attr_mask & IB_QP_RETRY_CNT) { 1861 context->params1 |= cpu_to_be32(attr->retry_cnt << 16); 1862 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT; 1863 } 1864 1865 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) { 1866 if (attr->max_rd_atomic) 1867 context->params1 |= 1868 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21); 1869 optpar |= MLX4_QP_OPTPAR_SRA_MAX; 1870 } 1871 1872 if (attr_mask & IB_QP_SQ_PSN) 1873 context->next_send_psn = cpu_to_be32(attr->sq_psn); 1874 1875 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) { 1876 if (attr->max_dest_rd_atomic) 1877 context->params2 |= 1878 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21); 1879 optpar |= MLX4_QP_OPTPAR_RRA_MAX; 1880 } 1881 1882 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) { 1883 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask); 1884 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE; 1885 } 1886 1887 if (ibqp->srq) 1888 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC); 1889 1890 if (attr_mask & IB_QP_MIN_RNR_TIMER) { 1891 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24); 1892 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT; 1893 } 1894 if (attr_mask & IB_QP_RQ_PSN) 1895 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn); 1896 1897 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */ 1898 if (attr_mask & IB_QP_QKEY) { 1899 if (qp->mlx4_ib_qp_type & 1900 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) 1901 context->qkey = cpu_to_be32(IB_QP_SET_QKEY); 1902 else { 1903 if (mlx4_is_mfunc(dev->dev) && 1904 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) && 1905 (attr->qkey & MLX4_RESERVED_QKEY_MASK) == 1906 MLX4_RESERVED_QKEY_BASE) { 1907 pr_err("Cannot use reserved QKEY" 1908 " 0x%x (range 0xffff0000..0xffffffff" 1909 " is reserved)\n", attr->qkey); 1910 err = -EINVAL; 1911 goto out; 1912 } 1913 context->qkey = cpu_to_be32(attr->qkey); 1914 } 1915 optpar |= MLX4_QP_OPTPAR_Q_KEY; 1916 } 1917 1918 if (ibqp->srq) 1919 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn); 1920 1921 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) 1922 context->db_rec_addr = cpu_to_be64(qp->db.dma); 1923 1924 if (cur_state == IB_QPS_INIT && 1925 new_state == IB_QPS_RTR && 1926 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI || 1927 ibqp->qp_type == IB_QPT_UD || 1928 ibqp->qp_type == IB_QPT_RAW_PACKET)) { 1929 context->pri_path.sched_queue = (qp->port - 1) << 6; 1930 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI || 1931 qp->mlx4_ib_qp_type & 1932 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) { 1933 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE; 1934 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI) 1935 context->pri_path.fl = 0x80; 1936 } else { 1937 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) 1938 context->pri_path.fl = 0x80; 1939 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE; 1940 } 1941 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) == 1942 IB_LINK_LAYER_ETHERNET) { 1943 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI || 1944 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) 1945 context->pri_path.feup = 1 << 7; /* don't fsm */ 1946 /* handle smac_index */ 1947 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD || 1948 qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI || 1949 qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) { 1950 err = handle_eth_ud_smac_index(dev, qp, context); 1951 if (err) { 1952 err = -EINVAL; 1953 goto out; 1954 } 1955 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI) 1956 dev->qp1_proxy[qp->port - 1] = qp; 1957 } 1958 } 1959 } 1960 1961 if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET) { 1962 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) | 1963 MLX4_IB_LINK_TYPE_ETH; 1964 if (dev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) { 1965 /* set QP to receive both tunneled & non-tunneled packets */ 1966 if (!(context->flags & cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET))) 1967 context->srqn = cpu_to_be32(7 << 28); 1968 } 1969 } 1970 1971 if (ibqp->qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) { 1972 int is_eth = rdma_port_get_link_layer( 1973 &dev->ib_dev, qp->port) == 1974 IB_LINK_LAYER_ETHERNET; 1975 if (is_eth) { 1976 context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH; 1977 optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH; 1978 } 1979 } 1980 1981 1982 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD && 1983 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify) 1984 sqd_event = 1; 1985 else 1986 sqd_event = 0; 1987 1988 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) 1989 context->rlkey_roce_mode |= (1 << 4); 1990 1991 /* 1992 * Before passing a kernel QP to the HW, make sure that the 1993 * ownership bits of the send queue are set and the SQ 1994 * headroom is stamped so that the hardware doesn't start 1995 * processing stale work requests. 1996 */ 1997 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) { 1998 struct mlx4_wqe_ctrl_seg *ctrl; 1999 int i; 2000 2001 for (i = 0; i < qp->sq.wqe_cnt; ++i) { 2002 ctrl = get_send_wqe(qp, i); 2003 ctrl->owner_opcode = cpu_to_be32(1U << 31); 2004 if (qp->sq_max_wqes_per_wr == 1) 2005 ctrl->fence_size = 2006 1 << (qp->sq.wqe_shift - 4); 2007 2008 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift); 2009 } 2010 } 2011 2012 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state), 2013 to_mlx4_state(new_state), context, optpar, 2014 sqd_event, &qp->mqp); 2015 if (err) 2016 goto out; 2017 2018 qp->state = new_state; 2019 2020 if (attr_mask & IB_QP_ACCESS_FLAGS) 2021 qp->atomic_rd_en = attr->qp_access_flags; 2022 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 2023 qp->resp_depth = attr->max_dest_rd_atomic; 2024 if (attr_mask & IB_QP_PORT) { 2025 qp->port = attr->port_num; 2026 update_mcg_macs(dev, qp); 2027 } 2028 if (attr_mask & IB_QP_ALT_PATH) 2029 qp->alt_port = attr->alt_port_num; 2030 2031 if (is_sqp(dev, qp)) 2032 store_sqp_attrs(to_msqp(qp), attr, attr_mask); 2033 2034 /* 2035 * If we moved QP0 to RTR, bring the IB link up; if we moved 2036 * QP0 to RESET or ERROR, bring the link back down. 2037 */ 2038 if (is_qp0(dev, qp)) { 2039 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR) 2040 if (mlx4_INIT_PORT(dev->dev, qp->port)) 2041 pr_warn("INIT_PORT failed for port %d\n", 2042 qp->port); 2043 2044 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR && 2045 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR)) 2046 mlx4_CLOSE_PORT(dev->dev, qp->port); 2047 } 2048 2049 /* 2050 * If we moved a kernel QP to RESET, clean up all old CQ 2051 * entries and reinitialize the QP. 2052 */ 2053 if (new_state == IB_QPS_RESET) { 2054 if (!ibqp->uobject) { 2055 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn, 2056 ibqp->srq ? to_msrq(ibqp->srq) : NULL); 2057 if (send_cq != recv_cq) 2058 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); 2059 2060 qp->rq.head = 0; 2061 qp->rq.tail = 0; 2062 qp->sq.head = 0; 2063 qp->sq.tail = 0; 2064 qp->sq_next_wqe = 0; 2065 if (qp->rq.wqe_cnt) 2066 *qp->db.db = 0; 2067 2068 if (qp->flags & MLX4_IB_QP_NETIF) 2069 mlx4_ib_steer_qp_reg(dev, qp, 0); 2070 } 2071 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) { 2072 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 2073 qp->pri.smac = 0; 2074 qp->pri.smac_port = 0; 2075 } 2076 if (qp->alt.smac) { 2077 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 2078 qp->alt.smac = 0; 2079 } 2080 if (qp->pri.vid < 0x1000) { 2081 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid); 2082 qp->pri.vid = 0xFFFF; 2083 qp->pri.candidate_vid = 0xFFFF; 2084 qp->pri.update_vid = 0; 2085 } 2086 2087 if (qp->alt.vid < 0x1000) { 2088 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid); 2089 qp->alt.vid = 0xFFFF; 2090 qp->alt.candidate_vid = 0xFFFF; 2091 qp->alt.update_vid = 0; 2092 } 2093 } 2094out: 2095 if (err && qp->counter_index) 2096 mlx4_ib_free_qp_counter(dev, qp); 2097 if (err && steer_qp) 2098 mlx4_ib_steer_qp_reg(dev, qp, 0); 2099 kfree(context); 2100 if (qp->pri.candidate_smac || 2101 (!qp->pri.candidate_smac && qp->pri.candidate_smac_port)) { 2102 if (err) { 2103 mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac); 2104 } else { 2105 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) 2106 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 2107 qp->pri.smac = qp->pri.candidate_smac; 2108 qp->pri.smac_index = qp->pri.candidate_smac_index; 2109 qp->pri.smac_port = qp->pri.candidate_smac_port; 2110 } 2111 qp->pri.candidate_smac = 0; 2112 qp->pri.candidate_smac_index = 0; 2113 qp->pri.candidate_smac_port = 0; 2114 } 2115 if (qp->alt.candidate_smac) { 2116 if (err) { 2117 mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac); 2118 } else { 2119 if (qp->alt.smac) 2120 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 2121 qp->alt.smac = qp->alt.candidate_smac; 2122 qp->alt.smac_index = qp->alt.candidate_smac_index; 2123 qp->alt.smac_port = qp->alt.candidate_smac_port; 2124 } 2125 qp->alt.candidate_smac = 0; 2126 qp->alt.candidate_smac_index = 0; 2127 qp->alt.candidate_smac_port = 0; 2128 } 2129 2130 if (qp->pri.update_vid) { 2131 if (err) { 2132 if (qp->pri.candidate_vid < 0x1000) 2133 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port, 2134 qp->pri.candidate_vid); 2135 } else { 2136 if (qp->pri.vid < 0x1000) 2137 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, 2138 qp->pri.vid); 2139 qp->pri.vid = qp->pri.candidate_vid; 2140 qp->pri.vlan_port = qp->pri.candidate_vlan_port; 2141 qp->pri.vlan_index = qp->pri.candidate_vlan_index; 2142 } 2143 qp->pri.candidate_vid = 0xFFFF; 2144 qp->pri.update_vid = 0; 2145 } 2146 2147 if (qp->alt.update_vid) { 2148 if (err) { 2149 if (qp->alt.candidate_vid < 0x1000) 2150 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port, 2151 qp->alt.candidate_vid); 2152 } else { 2153 if (qp->alt.vid < 0x1000) 2154 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, 2155 qp->alt.vid); 2156 qp->alt.vid = qp->alt.candidate_vid; 2157 qp->alt.vlan_port = qp->alt.candidate_vlan_port; 2158 qp->alt.vlan_index = qp->alt.candidate_vlan_index; 2159 } 2160 qp->alt.candidate_vid = 0xFFFF; 2161 qp->alt.update_vid = 0; 2162 } 2163 2164 return err; 2165} 2166 2167static int _mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 2168 int attr_mask, struct ib_udata *udata) 2169{ 2170 struct mlx4_ib_dev *dev = to_mdev(ibqp->device); 2171 struct mlx4_ib_qp *qp = to_mqp(ibqp); 2172 enum ib_qp_state cur_state, new_state; 2173 int err = -EINVAL; 2174 mutex_lock(&qp->mutex); 2175 2176 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state; 2177 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; 2178 2179 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, 2180 attr_mask)) { 2181 pr_debug("qpn 0x%x: invalid attribute mask specified " 2182 "for transition %d to %d. qp_type %d," 2183 " attr_mask 0x%x\n", 2184 ibqp->qp_num, cur_state, new_state, 2185 ibqp->qp_type, attr_mask); 2186 goto out; 2187 } 2188 2189 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) { 2190 if ((cur_state == IB_QPS_RESET) && (new_state == IB_QPS_INIT)) { 2191 if ((ibqp->qp_type == IB_QPT_RC) || 2192 (ibqp->qp_type == IB_QPT_UD) || 2193 (ibqp->qp_type == IB_QPT_UC) || 2194 (ibqp->qp_type == IB_QPT_RAW_PACKET) || 2195 (ibqp->qp_type == IB_QPT_XRC_INI)) { 2196 attr->port_num = mlx4_ib_bond_next_port(dev); 2197 } 2198 } else { 2199 /* no sense in changing port_num 2200 * when ports are bonded */ 2201 attr_mask &= ~IB_QP_PORT; 2202 } 2203 } 2204 2205 if ((attr_mask & IB_QP_PORT) && 2206 (attr->port_num == 0 || attr->port_num > dev->num_ports)) { 2207 pr_debug("qpn 0x%x: invalid port number (%d) specified " 2208 "for transition %d to %d. qp_type %d\n", 2209 ibqp->qp_num, attr->port_num, cur_state, 2210 new_state, ibqp->qp_type); 2211 goto out; 2212 } 2213 2214 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) && 2215 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) != 2216 IB_LINK_LAYER_ETHERNET)) 2217 goto out; 2218 2219 if (attr_mask & IB_QP_PKEY_INDEX) { 2220 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 2221 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) { 2222 pr_debug("qpn 0x%x: invalid pkey index (%d) specified " 2223 "for transition %d to %d. qp_type %d\n", 2224 ibqp->qp_num, attr->pkey_index, cur_state, 2225 new_state, ibqp->qp_type); 2226 goto out; 2227 } 2228 } 2229 2230 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC && 2231 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) { 2232 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. " 2233 "Transition %d to %d. qp_type %d\n", 2234 ibqp->qp_num, attr->max_rd_atomic, cur_state, 2235 new_state, ibqp->qp_type); 2236 goto out; 2237 } 2238 2239 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC && 2240 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) { 2241 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. " 2242 "Transition %d to %d. qp_type %d\n", 2243 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state, 2244 new_state, ibqp->qp_type); 2245 goto out; 2246 } 2247 2248 if (cur_state == new_state && cur_state == IB_QPS_RESET) { 2249 err = 0; 2250 goto out; 2251 } 2252 2253 err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state, udata); 2254 2255 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) 2256 attr->port_num = 1; 2257 2258out: 2259 mutex_unlock(&qp->mutex); 2260 return err; 2261} 2262 2263int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 2264 int attr_mask, struct ib_udata *udata) 2265{ 2266 struct mlx4_ib_qp *mqp = to_mqp(ibqp); 2267 int ret; 2268 2269 ret = _mlx4_ib_modify_qp(ibqp, attr, attr_mask, udata); 2270 2271 if (mqp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) { 2272 struct mlx4_ib_sqp *sqp = to_msqp(mqp); 2273 int err = 0; 2274 2275 if (sqp->roce_v2_gsi) 2276 err = ib_modify_qp(sqp->roce_v2_gsi, attr, attr_mask); 2277 if (err) 2278 pr_err("Failed to modify GSI QP for RoCEv2 (%d)\n", 2279 err); 2280 } 2281 return ret; 2282} 2283 2284static int vf_get_qp0_qkey(struct mlx4_dev *dev, int qpn, u32 *qkey) 2285{ 2286 int i; 2287 for (i = 0; i < dev->caps.num_ports; i++) { 2288 if (qpn == dev->caps.qp0_proxy[i] || 2289 qpn == dev->caps.qp0_tunnel[i]) { 2290 *qkey = dev->caps.qp0_qkey[i]; 2291 return 0; 2292 } 2293 } 2294 return -EINVAL; 2295} 2296 2297static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp, 2298 const struct ib_ud_wr *wr, 2299 void *wqe, unsigned *mlx_seg_len) 2300{ 2301 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device); 2302 struct ib_device *ib_dev = &mdev->ib_dev; 2303 struct mlx4_wqe_mlx_seg *mlx = wqe; 2304 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx; 2305 struct mlx4_ib_ah *ah = to_mah(wr->ah); 2306 u16 pkey; 2307 u32 qkey; 2308 int send_size; 2309 int header_size; 2310 int spc; 2311 int i; 2312 2313 if (wr->wr.opcode != IB_WR_SEND) 2314 return -EINVAL; 2315 2316 send_size = 0; 2317 2318 for (i = 0; i < wr->wr.num_sge; ++i) 2319 send_size += wr->wr.sg_list[i].length; 2320 2321 /* for proxy-qp0 sends, need to add in size of tunnel header */ 2322 /* for tunnel-qp0 sends, tunnel header is already in s/g list */ 2323 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) 2324 send_size += sizeof (struct mlx4_ib_tunnel_header); 2325 2326 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, 0, 0, &sqp->ud_header); 2327 2328 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) { 2329 sqp->ud_header.lrh.service_level = 2330 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28; 2331 sqp->ud_header.lrh.destination_lid = 2332 cpu_to_be16(ah->av.ib.g_slid & 0x7f); 2333 sqp->ud_header.lrh.source_lid = 2334 cpu_to_be16(ah->av.ib.g_slid & 0x7f); 2335 } 2336 2337 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); 2338 2339 /* force loopback */ 2340 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR); 2341 mlx->rlid = sqp->ud_header.lrh.destination_lid; 2342 2343 sqp->ud_header.lrh.virtual_lane = 0; 2344 sqp->ud_header.bth.solicited_event = !!(wr->wr.send_flags & IB_SEND_SOLICITED); 2345 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey); 2346 sqp->ud_header.bth.pkey = cpu_to_be16(pkey); 2347 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER) 2348 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->remote_qpn); 2349 else 2350 sqp->ud_header.bth.destination_qpn = 2351 cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]); 2352 2353 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1)); 2354 if (mlx4_is_master(mdev->dev)) { 2355 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey)) 2356 return -EINVAL; 2357 } else { 2358 if (vf_get_qp0_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey)) 2359 return -EINVAL; 2360 } 2361 sqp->ud_header.deth.qkey = cpu_to_be32(qkey); 2362 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn); 2363 2364 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY; 2365 sqp->ud_header.immediate_present = 0; 2366 2367 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf); 2368 2369 /* 2370 * Inline data segments may not cross a 64 byte boundary. If 2371 * our UD header is bigger than the space available up to the 2372 * next 64 byte boundary in the WQE, use two inline data 2373 * segments to hold the UD header. 2374 */ 2375 spc = MLX4_INLINE_ALIGN - 2376 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1)); 2377 if (header_size <= spc) { 2378 inl->byte_count = cpu_to_be32((1U << 31) | header_size); 2379 memcpy(inl + 1, sqp->header_buf, header_size); 2380 i = 1; 2381 } else { 2382 inl->byte_count = cpu_to_be32((1U << 31) | spc); 2383 memcpy(inl + 1, sqp->header_buf, spc); 2384 2385 inl = (void *) (inl + 1) + spc; 2386 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc); 2387 /* 2388 * Need a barrier here to make sure all the data is 2389 * visible before the byte_count field is set. 2390 * Otherwise the HCA prefetcher could grab the 64-byte 2391 * chunk with this inline segment and get a valid (!= 2392 * 0xffffffff) byte count but stale data, and end up 2393 * generating a packet with bad headers. 2394 * 2395 * The first inline segment's byte_count field doesn't 2396 * need a barrier, because it comes after a 2397 * control/MLX segment and therefore is at an offset 2398 * of 16 mod 64. 2399 */ 2400 wmb(); 2401 inl->byte_count = cpu_to_be32((1U << 31) | (header_size - spc)); 2402 i = 2; 2403 } 2404 2405 *mlx_seg_len = 2406 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16); 2407 return 0; 2408} 2409 2410static u8 sl_to_vl(struct mlx4_ib_dev *dev, u8 sl, int port_num) 2411{ 2412 union sl2vl_tbl_to_u64 tmp_vltab; 2413 u8 vl; 2414 2415 if (sl > 15) 2416 return 0xf; 2417 tmp_vltab.sl64 = atomic64_read(&dev->sl2vl[port_num - 1]); 2418 vl = tmp_vltab.sl8[sl >> 1]; 2419 if (sl & 1) 2420 vl &= 0x0f; 2421 else 2422 vl >>= 4; 2423 return vl; 2424} 2425 2426#define MLX4_ROCEV2_QP1_SPORT 0xC000 2427static int build_mlx_header(struct mlx4_ib_sqp *sqp, const struct ib_ud_wr *wr, 2428 void *wqe, unsigned *mlx_seg_len) 2429{ 2430 struct ib_device *ib_dev = sqp->qp.ibqp.device; 2431 struct mlx4_wqe_mlx_seg *mlx = wqe; 2432 struct mlx4_wqe_ctrl_seg *ctrl = wqe; 2433 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx; 2434 struct mlx4_ib_ah *ah = to_mah(wr->ah); 2435 union ib_gid sgid; 2436 u16 pkey; 2437 int send_size; 2438 int header_size; 2439 int spc; 2440 int i; 2441 int err = 0; 2442 u16 vlan = 0xffff; 2443 bool is_eth; 2444 bool is_vlan = false; 2445 bool is_grh; 2446 bool is_udp = false; 2447 int ip_version = 0; 2448 2449 send_size = 0; 2450 for (i = 0; i < wr->wr.num_sge; ++i) 2451 send_size += wr->wr.sg_list[i].length; 2452 2453 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET; 2454 is_grh = mlx4_ib_ah_grh_present(ah); 2455 if (is_eth) { 2456 struct ib_gid_attr gid_attr; 2457 2458 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) { 2459 /* When multi-function is enabled, the ib_core gid 2460 * indexes don't necessarily match the hw ones, so 2461 * we must use our own cache */ 2462 err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev, 2463 be32_to_cpu(ah->av.ib.port_pd) >> 24, 2464 ah->av.ib.gid_index, &sgid.raw[0]); 2465 if (err) 2466 return err; 2467 } else { 2468 err = ib_get_cached_gid(ib_dev, 2469 be32_to_cpu(ah->av.ib.port_pd) >> 24, 2470 ah->av.ib.gid_index, &sgid, 2471 &gid_attr); 2472 if (!err) { 2473 if (gid_attr.ndev) 2474 if_rele(gid_attr.ndev); 2475 if (!memcmp(&sgid, &zgid, sizeof(sgid))) 2476 err = -ENOENT; 2477 } 2478 if (!err) { 2479 is_udp = gid_attr.gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP; 2480 if (is_udp) { 2481 if (ipv6_addr_v4mapped((struct in6_addr *)&sgid)) 2482 ip_version = 4; 2483 else 2484 ip_version = 6; 2485 is_grh = false; 2486 } 2487 } else { 2488 return err; 2489 } 2490 } 2491 if (ah->av.eth.vlan != cpu_to_be16(0xffff)) { 2492 vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff; 2493 is_vlan = 1; 2494 } 2495 } 2496 err = ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 2497 ip_version, is_udp, 0, &sqp->ud_header); 2498 if (err) 2499 return err; 2500 2501 if (!is_eth) { 2502 sqp->ud_header.lrh.service_level = 2503 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28; 2504 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid; 2505 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f); 2506 } 2507 2508 if (is_grh || (ip_version == 6)) { 2509 sqp->ud_header.grh.traffic_class = 2510 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff; 2511 sqp->ud_header.grh.flow_label = 2512 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff); 2513 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit; 2514 if (is_eth) { 2515 memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16); 2516 } else { 2517 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) { 2518 /* When multi-function is enabled, the ib_core gid 2519 * indexes don't necessarily match the hw ones, so 2520 * we must use our own cache 2521 */ 2522 sqp->ud_header.grh.source_gid.global.subnet_prefix = 2523 cpu_to_be64(atomic64_read(&(to_mdev(ib_dev)->sriov. 2524 demux[sqp->qp.port - 1]. 2525 subnet_prefix))); 2526 sqp->ud_header.grh.source_gid.global.interface_id = 2527 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1]. 2528 guid_cache[ah->av.ib.gid_index]; 2529 } else { 2530 ib_get_cached_gid(ib_dev, 2531 be32_to_cpu(ah->av.ib.port_pd) >> 24, 2532 ah->av.ib.gid_index, 2533 &sqp->ud_header.grh.source_gid, NULL); 2534 } 2535 } 2536 memcpy(sqp->ud_header.grh.destination_gid.raw, 2537 ah->av.ib.dgid, 16); 2538 } 2539 2540 if (ip_version == 4) { 2541 sqp->ud_header.ip4.tos = 2542 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff; 2543 sqp->ud_header.ip4.id = 0; 2544 sqp->ud_header.ip4.frag_off = htons(IP_DF); 2545 sqp->ud_header.ip4.ttl = ah->av.eth.hop_limit; 2546 2547 memcpy(&sqp->ud_header.ip4.saddr, 2548 sgid.raw + 12, 4); 2549 memcpy(&sqp->ud_header.ip4.daddr, ah->av.ib.dgid + 12, 4); 2550 sqp->ud_header.ip4.check = ib_ud_ip4_csum(&sqp->ud_header); 2551 } 2552 2553 if (is_udp) { 2554 sqp->ud_header.udp.dport = htons(ROCE_V2_UDP_DPORT); 2555 sqp->ud_header.udp.sport = htons(MLX4_ROCEV2_QP1_SPORT); 2556 sqp->ud_header.udp.csum = 0; 2557 } 2558 2559 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); 2560 2561 if (!is_eth) { 2562 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) | 2563 (sqp->ud_header.lrh.destination_lid == 2564 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) | 2565 (sqp->ud_header.lrh.service_level << 8)); 2566 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000)) 2567 mlx->flags |= cpu_to_be32(0x1); /* force loopback */ 2568 mlx->rlid = sqp->ud_header.lrh.destination_lid; 2569 } 2570 2571 switch (wr->wr.opcode) { 2572 case IB_WR_SEND: 2573 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY; 2574 sqp->ud_header.immediate_present = 0; 2575 break; 2576 case IB_WR_SEND_WITH_IMM: 2577 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; 2578 sqp->ud_header.immediate_present = 1; 2579 sqp->ud_header.immediate_data = wr->wr.ex.imm_data; 2580 break; 2581 default: 2582 return -EINVAL; 2583 } 2584 2585 if (is_eth) { 2586 struct in6_addr in6; 2587 u16 ether_type; 2588 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13; 2589 2590 ether_type = (!is_udp) ? MLX4_IB_IBOE_ETHERTYPE : 2591 (ip_version == 4 ? ETHERTYPE_IP : ETHERTYPE_IPV6); 2592 2593 mlx->sched_prio = cpu_to_be16(pcp); 2594 2595 ether_addr_copy(sqp->ud_header.eth.smac_h, ah->av.eth.s_mac); 2596 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6); 2597 memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2); 2598 memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4); 2599 memcpy(&in6, sgid.raw, sizeof(in6)); 2600 2601 2602 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6)) 2603 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK); 2604 if (!is_vlan) { 2605 sqp->ud_header.eth.type = cpu_to_be16(ether_type); 2606 } else { 2607 sqp->ud_header.vlan.type = cpu_to_be16(ether_type); 2608 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp); 2609 } 2610 } else { 2611 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 2612 sl_to_vl(to_mdev(ib_dev), 2613 sqp->ud_header.lrh.service_level, 2614 sqp->qp.port); 2615 if (sqp->qp.ibqp.qp_num && sqp->ud_header.lrh.virtual_lane == 15) 2616 return -EINVAL; 2617 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE) 2618 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE; 2619 } 2620 sqp->ud_header.bth.solicited_event = !!(wr->wr.send_flags & IB_SEND_SOLICITED); 2621 if (!sqp->qp.ibqp.qp_num) 2622 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey); 2623 else 2624 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->pkey_index, &pkey); 2625 sqp->ud_header.bth.pkey = cpu_to_be16(pkey); 2626 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->remote_qpn); 2627 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1)); 2628 sqp->ud_header.deth.qkey = cpu_to_be32(wr->remote_qkey & 0x80000000 ? 2629 sqp->qkey : wr->remote_qkey); 2630 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num); 2631 2632 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf); 2633 2634 if (0) { 2635 pr_err("built UD header of size %d:\n", header_size); 2636 for (i = 0; i < header_size / 4; ++i) { 2637 if (i % 8 == 0) 2638 pr_err(" [%02x] ", i * 4); 2639 pr_cont(" %08x", 2640 be32_to_cpu(((__be32 *) sqp->header_buf)[i])); 2641 if ((i + 1) % 8 == 0) 2642 pr_cont("\n"); 2643 } 2644 pr_err("\n"); 2645 } 2646 2647 /* 2648 * Inline data segments may not cross a 64 byte boundary. If 2649 * our UD header is bigger than the space available up to the 2650 * next 64 byte boundary in the WQE, use two inline data 2651 * segments to hold the UD header. 2652 */ 2653 spc = MLX4_INLINE_ALIGN - 2654 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1)); 2655 if (header_size <= spc) { 2656 inl->byte_count = cpu_to_be32(1U << 31 | header_size); 2657 memcpy(inl + 1, sqp->header_buf, header_size); 2658 i = 1; 2659 } else { 2660 inl->byte_count = cpu_to_be32(1U << 31 | spc); 2661 memcpy(inl + 1, sqp->header_buf, spc); 2662 2663 inl = (void *) (inl + 1) + spc; 2664 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc); 2665 /* 2666 * Need a barrier here to make sure all the data is 2667 * visible before the byte_count field is set. 2668 * Otherwise the HCA prefetcher could grab the 64-byte 2669 * chunk with this inline segment and get a valid (!= 2670 * 0xffffffff) byte count but stale data, and end up 2671 * generating a packet with bad headers. 2672 * 2673 * The first inline segment's byte_count field doesn't 2674 * need a barrier, because it comes after a 2675 * control/MLX segment and therefore is at an offset 2676 * of 16 mod 64. 2677 */ 2678 wmb(); 2679 inl->byte_count = cpu_to_be32(1U << 31 | (header_size - spc)); 2680 i = 2; 2681 } 2682 2683 *mlx_seg_len = 2684 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16); 2685 return 0; 2686} 2687 2688static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq) 2689{ 2690 unsigned cur; 2691 struct mlx4_ib_cq *cq; 2692 2693 cur = wq->head - wq->tail; 2694 if (likely(cur + nreq < wq->max_post)) 2695 return 0; 2696 2697 cq = to_mcq(ib_cq); 2698 spin_lock(&cq->lock); 2699 cur = wq->head - wq->tail; 2700 spin_unlock(&cq->lock); 2701 2702 return cur + nreq >= wq->max_post; 2703} 2704 2705static __be32 convert_access(int acc) 2706{ 2707 return (acc & IB_ACCESS_REMOTE_ATOMIC ? 2708 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) | 2709 (acc & IB_ACCESS_REMOTE_WRITE ? 2710 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) | 2711 (acc & IB_ACCESS_REMOTE_READ ? 2712 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) | 2713 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) | 2714 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ); 2715} 2716 2717static void set_reg_seg(struct mlx4_wqe_fmr_seg *fseg, 2718 const struct ib_reg_wr *wr) 2719{ 2720 struct mlx4_ib_mr *mr = to_mmr(wr->mr); 2721 2722 fseg->flags = convert_access(wr->access); 2723 fseg->mem_key = cpu_to_be32(wr->key); 2724 fseg->buf_list = cpu_to_be64(mr->page_map); 2725 fseg->start_addr = cpu_to_be64(mr->ibmr.iova); 2726 fseg->reg_len = cpu_to_be64(mr->ibmr.length); 2727 fseg->offset = 0; /* XXX -- is this just for ZBVA? */ 2728 fseg->page_size = cpu_to_be32(ilog2(mr->ibmr.page_size)); 2729 fseg->reserved[0] = 0; 2730 fseg->reserved[1] = 0; 2731} 2732 2733static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey) 2734{ 2735 memset(iseg, 0, sizeof(*iseg)); 2736 iseg->mem_key = cpu_to_be32(rkey); 2737} 2738 2739static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg, 2740 u64 remote_addr, u32 rkey) 2741{ 2742 rseg->raddr = cpu_to_be64(remote_addr); 2743 rseg->rkey = cpu_to_be32(rkey); 2744 rseg->reserved = 0; 2745} 2746 2747static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, 2748 const struct ib_atomic_wr *wr) 2749{ 2750 if (wr->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP) { 2751 aseg->swap_add = cpu_to_be64(wr->swap); 2752 aseg->compare = cpu_to_be64(wr->compare_add); 2753 } else if (wr->wr.opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) { 2754 aseg->swap_add = cpu_to_be64(wr->compare_add); 2755 aseg->compare = cpu_to_be64(wr->compare_add_mask); 2756 } else { 2757 aseg->swap_add = cpu_to_be64(wr->compare_add); 2758 aseg->compare = 0; 2759 } 2760 2761} 2762 2763static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg, 2764 const struct ib_atomic_wr *wr) 2765{ 2766 aseg->swap_add = cpu_to_be64(wr->swap); 2767 aseg->swap_add_mask = cpu_to_be64(wr->swap_mask); 2768 aseg->compare = cpu_to_be64(wr->compare_add); 2769 aseg->compare_mask = cpu_to_be64(wr->compare_add_mask); 2770} 2771 2772static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg, 2773 const struct ib_ud_wr *wr) 2774{ 2775 memcpy(dseg->av, &to_mah(wr->ah)->av, sizeof (struct mlx4_av)); 2776 dseg->dqpn = cpu_to_be32(wr->remote_qpn); 2777 dseg->qkey = cpu_to_be32(wr->remote_qkey); 2778 dseg->vlan = to_mah(wr->ah)->av.eth.vlan; 2779 memcpy(dseg->mac, to_mah(wr->ah)->av.eth.mac, 6); 2780} 2781 2782static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev, 2783 struct mlx4_wqe_datagram_seg *dseg, 2784 const struct ib_ud_wr *wr, 2785 enum mlx4_ib_qp_type qpt) 2786{ 2787 union mlx4_ext_av *av = &to_mah(wr->ah)->av; 2788 struct mlx4_av sqp_av = {0}; 2789 int port = *((u8 *) &av->ib.port_pd) & 0x3; 2790 2791 /* force loopback */ 2792 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000); 2793 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */ 2794 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel & 2795 cpu_to_be32(0xf0000000); 2796 2797 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av)); 2798 if (qpt == MLX4_IB_QPT_PROXY_GSI) 2799 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]); 2800 else 2801 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp0_tunnel[port - 1]); 2802 /* Use QKEY from the QP context, which is set by master */ 2803 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY); 2804} 2805 2806static void build_tunnel_header(const struct ib_ud_wr *wr, void *wqe, unsigned *mlx_seg_len) 2807{ 2808 struct mlx4_wqe_inline_seg *inl = wqe; 2809 struct mlx4_ib_tunnel_header hdr; 2810 struct mlx4_ib_ah *ah = to_mah(wr->ah); 2811 int spc; 2812 int i; 2813 2814 memcpy(&hdr.av, &ah->av, sizeof hdr.av); 2815 hdr.remote_qpn = cpu_to_be32(wr->remote_qpn); 2816 hdr.pkey_index = cpu_to_be16(wr->pkey_index); 2817 hdr.qkey = cpu_to_be32(wr->remote_qkey); 2818 memcpy(hdr.mac, ah->av.eth.mac, 6); 2819 hdr.vlan = ah->av.eth.vlan; 2820 2821 spc = MLX4_INLINE_ALIGN - 2822 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1)); 2823 if (sizeof (hdr) <= spc) { 2824 memcpy(inl + 1, &hdr, sizeof (hdr)); 2825 wmb(); 2826 inl->byte_count = cpu_to_be32((1U << 31) | (u32)sizeof(hdr)); 2827 i = 1; 2828 } else { 2829 memcpy(inl + 1, &hdr, spc); 2830 wmb(); 2831 inl->byte_count = cpu_to_be32((1U << 31) | spc); 2832 2833 inl = (void *) (inl + 1) + spc; 2834 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc); 2835 wmb(); 2836 inl->byte_count = cpu_to_be32((1U << 31) | (u32)(sizeof (hdr) - spc)); 2837 i = 2; 2838 } 2839 2840 *mlx_seg_len = 2841 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16); 2842} 2843 2844static void set_mlx_icrc_seg(void *dseg) 2845{ 2846 u32 *t = dseg; 2847 struct mlx4_wqe_inline_seg *iseg = dseg; 2848 2849 t[1] = 0; 2850 2851 /* 2852 * Need a barrier here before writing the byte_count field to 2853 * make sure that all the data is visible before the 2854 * byte_count field is set. Otherwise, if the segment begins 2855 * a new cacheline, the HCA prefetcher could grab the 64-byte 2856 * chunk and get a valid (!= * 0xffffffff) byte count but 2857 * stale data, and end up sending the wrong data. 2858 */ 2859 wmb(); 2860 2861 iseg->byte_count = cpu_to_be32((1U << 31) | 4); 2862} 2863 2864static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg) 2865{ 2866 dseg->lkey = cpu_to_be32(sg->lkey); 2867 dseg->addr = cpu_to_be64(sg->addr); 2868 2869 /* 2870 * Need a barrier here before writing the byte_count field to 2871 * make sure that all the data is visible before the 2872 * byte_count field is set. Otherwise, if the segment begins 2873 * a new cacheline, the HCA prefetcher could grab the 64-byte 2874 * chunk and get a valid (!= * 0xffffffff) byte count but 2875 * stale data, and end up sending the wrong data. 2876 */ 2877 wmb(); 2878 2879 dseg->byte_count = cpu_to_be32(sg->length); 2880} 2881 2882static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg) 2883{ 2884 dseg->byte_count = cpu_to_be32(sg->length); 2885 dseg->lkey = cpu_to_be32(sg->lkey); 2886 dseg->addr = cpu_to_be64(sg->addr); 2887} 2888 2889static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, const struct ib_ud_wr *wr, 2890 struct mlx4_ib_qp *qp, unsigned *lso_seg_len, 2891 __be32 *lso_hdr_sz, __be32 *blh) 2892{ 2893 unsigned halign = ALIGN(sizeof *wqe + wr->hlen, 16); 2894 2895 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE)) 2896 *blh = cpu_to_be32(1 << 6); 2897 2898 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) && 2899 wr->wr.num_sge > qp->sq.max_gs - (halign >> 4))) 2900 return -EINVAL; 2901 2902 memcpy(wqe->header, wr->header, wr->hlen); 2903 2904 *lso_hdr_sz = cpu_to_be32(wr->mss << 16 | wr->hlen); 2905 *lso_seg_len = halign; 2906 return 0; 2907} 2908 2909static __be32 send_ieth(const struct ib_send_wr *wr) 2910{ 2911 switch (wr->opcode) { 2912 case IB_WR_SEND_WITH_IMM: 2913 case IB_WR_RDMA_WRITE_WITH_IMM: 2914 return wr->ex.imm_data; 2915 2916 case IB_WR_SEND_WITH_INV: 2917 return cpu_to_be32(wr->ex.invalidate_rkey); 2918 2919 default: 2920 return 0; 2921 } 2922} 2923 2924static void add_zero_len_inline(void *wqe) 2925{ 2926 struct mlx4_wqe_inline_seg *inl = wqe; 2927 memset(wqe, 0, 16); 2928 inl->byte_count = cpu_to_be32(1U << 31); 2929} 2930 2931int mlx4_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 2932 const struct ib_send_wr **bad_wr) 2933{ 2934 struct mlx4_ib_qp *qp = to_mqp(ibqp); 2935 void *wqe; 2936 struct mlx4_wqe_ctrl_seg *ctrl; 2937 struct mlx4_wqe_data_seg *dseg; 2938 unsigned long flags; 2939 int nreq; 2940 int err = 0; 2941 unsigned ind; 2942 int uninitialized_var(stamp); 2943 int uninitialized_var(size); 2944 unsigned uninitialized_var(seglen); 2945 __be32 dummy; 2946 __be32 *lso_wqe; 2947 __be32 lso_hdr_sz = 0; 2948 __be32 blh; 2949 int i; 2950 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device); 2951 2952 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) { 2953 struct mlx4_ib_sqp *sqp = to_msqp(qp); 2954 2955 if (sqp->roce_v2_gsi) { 2956 struct mlx4_ib_ah *ah = to_mah(ud_wr(wr)->ah); 2957 struct ib_gid_attr gid_attr; 2958 union ib_gid gid; 2959 2960 if (!ib_get_cached_gid(ibqp->device, 2961 be32_to_cpu(ah->av.ib.port_pd) >> 24, 2962 ah->av.ib.gid_index, &gid, 2963 &gid_attr)) { 2964 if (gid_attr.ndev) 2965 if_rele(gid_attr.ndev); 2966 qp = (gid_attr.gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 2967 to_mqp(sqp->roce_v2_gsi) : qp; 2968 } else { 2969 pr_err("Failed to get gid at index %d. RoCEv2 will not work properly\n", 2970 ah->av.ib.gid_index); 2971 } 2972 } 2973 } 2974 2975 spin_lock_irqsave(&qp->sq.lock, flags); 2976 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) { 2977 err = -EIO; 2978 *bad_wr = wr; 2979 nreq = 0; 2980 goto out; 2981 } 2982 2983 ind = qp->sq_next_wqe; 2984 2985 for (nreq = 0; wr; ++nreq, wr = wr->next) { 2986 lso_wqe = &dummy; 2987 blh = 0; 2988 2989 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) { 2990 err = -ENOMEM; 2991 *bad_wr = wr; 2992 goto out; 2993 } 2994 2995 if (unlikely(wr->num_sge > qp->sq.max_gs)) { 2996 err = -EINVAL; 2997 *bad_wr = wr; 2998 goto out; 2999 } 3000 3001 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1)); 3002 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id; 3003 3004 ctrl->srcrb_flags = 3005 (wr->send_flags & IB_SEND_SIGNALED ? 3006 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) | 3007 (wr->send_flags & IB_SEND_SOLICITED ? 3008 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) | 3009 ((wr->send_flags & IB_SEND_IP_CSUM) ? 3010 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM | 3011 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) | 3012 qp->sq_signal_bits; 3013 3014 ctrl->imm = send_ieth(wr); 3015 3016 wqe += sizeof *ctrl; 3017 size = sizeof *ctrl / 16; 3018 3019 switch (qp->mlx4_ib_qp_type) { 3020 case MLX4_IB_QPT_RC: 3021 case MLX4_IB_QPT_UC: 3022 switch (wr->opcode) { 3023 case IB_WR_ATOMIC_CMP_AND_SWP: 3024 case IB_WR_ATOMIC_FETCH_AND_ADD: 3025 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD: 3026 set_raddr_seg(wqe, atomic_wr(wr)->remote_addr, 3027 atomic_wr(wr)->rkey); 3028 wqe += sizeof (struct mlx4_wqe_raddr_seg); 3029 3030 set_atomic_seg(wqe, atomic_wr(wr)); 3031 wqe += sizeof (struct mlx4_wqe_atomic_seg); 3032 3033 size += (sizeof (struct mlx4_wqe_raddr_seg) + 3034 sizeof (struct mlx4_wqe_atomic_seg)) / 16; 3035 3036 break; 3037 3038 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP: 3039 set_raddr_seg(wqe, atomic_wr(wr)->remote_addr, 3040 atomic_wr(wr)->rkey); 3041 wqe += sizeof (struct mlx4_wqe_raddr_seg); 3042 3043 set_masked_atomic_seg(wqe, atomic_wr(wr)); 3044 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg); 3045 3046 size += (sizeof (struct mlx4_wqe_raddr_seg) + 3047 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16; 3048 3049 break; 3050 3051 case IB_WR_RDMA_READ: 3052 case IB_WR_RDMA_WRITE: 3053 case IB_WR_RDMA_WRITE_WITH_IMM: 3054 set_raddr_seg(wqe, rdma_wr(wr)->remote_addr, 3055 rdma_wr(wr)->rkey); 3056 wqe += sizeof (struct mlx4_wqe_raddr_seg); 3057 size += sizeof (struct mlx4_wqe_raddr_seg) / 16; 3058 break; 3059 3060 case IB_WR_LOCAL_INV: 3061 ctrl->srcrb_flags |= 3062 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER); 3063 set_local_inv_seg(wqe, wr->ex.invalidate_rkey); 3064 wqe += sizeof (struct mlx4_wqe_local_inval_seg); 3065 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16; 3066 break; 3067 3068 case IB_WR_REG_MR: 3069 ctrl->srcrb_flags |= 3070 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER); 3071 set_reg_seg(wqe, reg_wr(wr)); 3072 wqe += sizeof(struct mlx4_wqe_fmr_seg); 3073 size += sizeof(struct mlx4_wqe_fmr_seg) / 16; 3074 break; 3075 3076 default: 3077 /* No extra segments required for sends */ 3078 break; 3079 } 3080 break; 3081 3082 case MLX4_IB_QPT_TUN_SMI_OWNER: 3083 err = build_sriov_qp0_header(to_msqp(qp), ud_wr(wr), 3084 ctrl, &seglen); 3085 if (unlikely(err)) { 3086 *bad_wr = wr; 3087 goto out; 3088 } 3089 wqe += seglen; 3090 size += seglen / 16; 3091 break; 3092 case MLX4_IB_QPT_TUN_SMI: 3093 case MLX4_IB_QPT_TUN_GSI: 3094 /* this is a UD qp used in MAD responses to slaves. */ 3095 set_datagram_seg(wqe, ud_wr(wr)); 3096 /* set the forced-loopback bit in the data seg av */ 3097 *(__be32 *) wqe |= cpu_to_be32(0x80000000); 3098 wqe += sizeof (struct mlx4_wqe_datagram_seg); 3099 size += sizeof (struct mlx4_wqe_datagram_seg) / 16; 3100 break; 3101 case MLX4_IB_QPT_UD: 3102 set_datagram_seg(wqe, ud_wr(wr)); 3103 wqe += sizeof (struct mlx4_wqe_datagram_seg); 3104 size += sizeof (struct mlx4_wqe_datagram_seg) / 16; 3105 3106 if (wr->opcode == IB_WR_LSO) { 3107 err = build_lso_seg(wqe, ud_wr(wr), qp, &seglen, 3108 &lso_hdr_sz, &blh); 3109 if (unlikely(err)) { 3110 *bad_wr = wr; 3111 goto out; 3112 } 3113 lso_wqe = (__be32 *) wqe; 3114 wqe += seglen; 3115 size += seglen / 16; 3116 } 3117 break; 3118 3119 case MLX4_IB_QPT_PROXY_SMI_OWNER: 3120 err = build_sriov_qp0_header(to_msqp(qp), ud_wr(wr), 3121 ctrl, &seglen); 3122 if (unlikely(err)) { 3123 *bad_wr = wr; 3124 goto out; 3125 } 3126 wqe += seglen; 3127 size += seglen / 16; 3128 /* to start tunnel header on a cache-line boundary */ 3129 add_zero_len_inline(wqe); 3130 wqe += 16; 3131 size++; 3132 build_tunnel_header(ud_wr(wr), wqe, &seglen); 3133 wqe += seglen; 3134 size += seglen / 16; 3135 break; 3136 case MLX4_IB_QPT_PROXY_SMI: 3137 case MLX4_IB_QPT_PROXY_GSI: 3138 /* If we are tunneling special qps, this is a UD qp. 3139 * In this case we first add a UD segment targeting 3140 * the tunnel qp, and then add a header with address 3141 * information */ 3142 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, 3143 ud_wr(wr), 3144 qp->mlx4_ib_qp_type); 3145 wqe += sizeof (struct mlx4_wqe_datagram_seg); 3146 size += sizeof (struct mlx4_wqe_datagram_seg) / 16; 3147 build_tunnel_header(ud_wr(wr), wqe, &seglen); 3148 wqe += seglen; 3149 size += seglen / 16; 3150 break; 3151 3152 case MLX4_IB_QPT_SMI: 3153 case MLX4_IB_QPT_GSI: 3154 err = build_mlx_header(to_msqp(qp), ud_wr(wr), ctrl, 3155 &seglen); 3156 if (unlikely(err)) { 3157 *bad_wr = wr; 3158 goto out; 3159 } 3160 wqe += seglen; 3161 size += seglen / 16; 3162 break; 3163 3164 default: 3165 break; 3166 } 3167 3168 /* 3169 * Write data segments in reverse order, so as to 3170 * overwrite cacheline stamp last within each 3171 * cacheline. This avoids issues with WQE 3172 * prefetching. 3173 */ 3174 3175 dseg = wqe; 3176 dseg += wr->num_sge - 1; 3177 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16); 3178 3179 /* Add one more inline data segment for ICRC for MLX sends */ 3180 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI || 3181 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI || 3182 qp->mlx4_ib_qp_type & 3183 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) { 3184 set_mlx_icrc_seg(dseg + 1); 3185 size += sizeof (struct mlx4_wqe_data_seg) / 16; 3186 } 3187 3188 for (i = wr->num_sge - 1; i >= 0; --i, --dseg) 3189 set_data_seg(dseg, wr->sg_list + i); 3190 3191 /* 3192 * Possibly overwrite stamping in cacheline with LSO 3193 * segment only after making sure all data segments 3194 * are written. 3195 */ 3196 wmb(); 3197 *lso_wqe = lso_hdr_sz; 3198 3199 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ? 3200 MLX4_WQE_CTRL_FENCE : 0) | size; 3201 3202 /* 3203 * Make sure descriptor is fully written before 3204 * setting ownership bit (because HW can start 3205 * executing as soon as we do). 3206 */ 3207 wmb(); 3208 3209 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) { 3210 *bad_wr = wr; 3211 err = -EINVAL; 3212 goto out; 3213 } 3214 3215 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] | 3216 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1U << 31) : 0) | blh; 3217 3218 stamp = ind + qp->sq_spare_wqes; 3219 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift); 3220 3221 /* 3222 * We can improve latency by not stamping the last 3223 * send queue WQE until after ringing the doorbell, so 3224 * only stamp here if there are still more WQEs to post. 3225 * 3226 * Same optimization applies to padding with NOP wqe 3227 * in case of WQE shrinking (used to prevent wrap-around 3228 * in the middle of WR). 3229 */ 3230 if (wr->next) { 3231 stamp_send_wqe(qp, stamp, size * 16); 3232 ind = pad_wraparound(qp, ind); 3233 } 3234 } 3235 3236out: 3237 if (likely(nreq)) { 3238 qp->sq.head += nreq; 3239 3240 /* 3241 * Make sure that descriptors are written before 3242 * doorbell record. 3243 */ 3244 wmb(); 3245 3246 writel(qp->doorbell_qpn, 3247 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL); 3248 3249 /* 3250 * Make sure doorbells don't leak out of SQ spinlock 3251 * and reach the HCA out of order. 3252 */ 3253 mmiowb(); 3254 3255 stamp_send_wqe(qp, stamp, size * 16); 3256 3257 ind = pad_wraparound(qp, ind); 3258 qp->sq_next_wqe = ind; 3259 } 3260 3261 spin_unlock_irqrestore(&qp->sq.lock, flags); 3262 3263 return err; 3264} 3265 3266int mlx4_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 3267 const struct ib_recv_wr **bad_wr) 3268{ 3269 struct mlx4_ib_qp *qp = to_mqp(ibqp); 3270 struct mlx4_wqe_data_seg *scat; 3271 unsigned long flags; 3272 int err = 0; 3273 int nreq; 3274 int ind; 3275 int max_gs; 3276 int i; 3277 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device); 3278 3279 max_gs = qp->rq.max_gs; 3280 spin_lock_irqsave(&qp->rq.lock, flags); 3281 3282 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) { 3283 err = -EIO; 3284 *bad_wr = wr; 3285 nreq = 0; 3286 goto out; 3287 } 3288 3289 ind = qp->rq.head & (qp->rq.wqe_cnt - 1); 3290 3291 for (nreq = 0; wr; ++nreq, wr = wr->next) { 3292 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) { 3293 err = -ENOMEM; 3294 *bad_wr = wr; 3295 goto out; 3296 } 3297 3298 if (unlikely(wr->num_sge > qp->rq.max_gs)) { 3299 err = -EINVAL; 3300 *bad_wr = wr; 3301 goto out; 3302 } 3303 3304 scat = get_recv_wqe(qp, ind); 3305 3306 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 3307 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) { 3308 ib_dma_sync_single_for_device(ibqp->device, 3309 qp->sqp_proxy_rcv[ind].map, 3310 sizeof (struct mlx4_ib_proxy_sqp_hdr), 3311 DMA_FROM_DEVICE); 3312 scat->byte_count = 3313 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr)); 3314 /* use dma lkey from upper layer entry */ 3315 scat->lkey = cpu_to_be32(wr->sg_list->lkey); 3316 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map); 3317 scat++; 3318 max_gs--; 3319 } 3320 3321 for (i = 0; i < wr->num_sge; ++i) 3322 __set_data_seg(scat + i, wr->sg_list + i); 3323 3324 if (i < max_gs) { 3325 scat[i].byte_count = 0; 3326 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY); 3327 scat[i].addr = 0; 3328 } 3329 3330 qp->rq.wrid[ind] = wr->wr_id; 3331 3332 ind = (ind + 1) & (qp->rq.wqe_cnt - 1); 3333 } 3334 3335out: 3336 if (likely(nreq)) { 3337 qp->rq.head += nreq; 3338 3339 /* 3340 * Make sure that descriptors are written before 3341 * doorbell record. 3342 */ 3343 wmb(); 3344 3345 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff); 3346 } 3347 3348 spin_unlock_irqrestore(&qp->rq.lock, flags); 3349 3350 return err; 3351} 3352 3353static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state) 3354{ 3355 switch (mlx4_state) { 3356 case MLX4_QP_STATE_RST: return IB_QPS_RESET; 3357 case MLX4_QP_STATE_INIT: return IB_QPS_INIT; 3358 case MLX4_QP_STATE_RTR: return IB_QPS_RTR; 3359 case MLX4_QP_STATE_RTS: return IB_QPS_RTS; 3360 case MLX4_QP_STATE_SQ_DRAINING: 3361 case MLX4_QP_STATE_SQD: return IB_QPS_SQD; 3362 case MLX4_QP_STATE_SQER: return IB_QPS_SQE; 3363 case MLX4_QP_STATE_ERR: return IB_QPS_ERR; 3364 default: return -1; 3365 } 3366} 3367 3368static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state) 3369{ 3370 switch (mlx4_mig_state) { 3371 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED; 3372 case MLX4_QP_PM_REARM: return IB_MIG_REARM; 3373 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED; 3374 default: return -1; 3375 } 3376} 3377 3378static int to_ib_qp_access_flags(int mlx4_flags) 3379{ 3380 int ib_flags = 0; 3381 3382 if (mlx4_flags & MLX4_QP_BIT_RRE) 3383 ib_flags |= IB_ACCESS_REMOTE_READ; 3384 if (mlx4_flags & MLX4_QP_BIT_RWE) 3385 ib_flags |= IB_ACCESS_REMOTE_WRITE; 3386 if (mlx4_flags & MLX4_QP_BIT_RAE) 3387 ib_flags |= IB_ACCESS_REMOTE_ATOMIC; 3388 3389 return ib_flags; 3390} 3391 3392static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr, 3393 struct mlx4_qp_path *path) 3394{ 3395 struct mlx4_dev *dev = ibdev->dev; 3396 int is_eth; 3397 3398 memset(ib_ah_attr, 0, sizeof *ib_ah_attr); 3399 ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1; 3400 3401 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports) 3402 return; 3403 3404 is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) == 3405 IB_LINK_LAYER_ETHERNET; 3406 if (is_eth) 3407 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) | 3408 ((path->sched_queue & 4) << 1); 3409 else 3410 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf; 3411 3412 ib_ah_attr->dlid = be16_to_cpu(path->rlid); 3413 ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f; 3414 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0; 3415 ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0; 3416 if (ib_ah_attr->ah_flags) { 3417 ib_ah_attr->grh.sgid_index = path->mgid_index; 3418 ib_ah_attr->grh.hop_limit = path->hop_limit; 3419 ib_ah_attr->grh.traffic_class = 3420 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff; 3421 ib_ah_attr->grh.flow_label = 3422 be32_to_cpu(path->tclass_flowlabel) & 0xfffff; 3423 memcpy(ib_ah_attr->grh.dgid.raw, 3424 path->rgid, sizeof ib_ah_attr->grh.dgid.raw); 3425 } 3426} 3427 3428int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask, 3429 struct ib_qp_init_attr *qp_init_attr) 3430{ 3431 struct mlx4_ib_dev *dev = to_mdev(ibqp->device); 3432 struct mlx4_ib_qp *qp = to_mqp(ibqp); 3433 struct mlx4_qp_context context; 3434 int mlx4_state; 3435 int err = 0; 3436 3437 mutex_lock(&qp->mutex); 3438 3439 if (qp->state == IB_QPS_RESET) { 3440 qp_attr->qp_state = IB_QPS_RESET; 3441 goto done; 3442 } 3443 3444 err = mlx4_qp_query(dev->dev, &qp->mqp, &context); 3445 if (err) { 3446 err = -EINVAL; 3447 goto out; 3448 } 3449 3450 mlx4_state = be32_to_cpu(context.flags) >> 28; 3451 3452 qp->state = to_ib_qp_state(mlx4_state); 3453 qp_attr->qp_state = qp->state; 3454 qp_attr->path_mtu = context.mtu_msgmax >> 5; 3455 qp_attr->path_mig_state = 3456 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3); 3457 qp_attr->qkey = be32_to_cpu(context.qkey); 3458 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff; 3459 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff; 3460 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff; 3461 qp_attr->qp_access_flags = 3462 to_ib_qp_access_flags(be32_to_cpu(context.params2)); 3463 3464 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) { 3465 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path); 3466 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path); 3467 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f; 3468 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num; 3469 } 3470 3471 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f; 3472 if (qp_attr->qp_state == IB_QPS_INIT) 3473 qp_attr->port_num = qp->port; 3474 else 3475 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1; 3476 3477 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */ 3478 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING; 3479 3480 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7); 3481 3482 qp_attr->max_dest_rd_atomic = 3483 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7); 3484 qp_attr->min_rnr_timer = 3485 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f; 3486 qp_attr->timeout = context.pri_path.ackto >> 3; 3487 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7; 3488 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7; 3489 qp_attr->alt_timeout = context.alt_path.ackto >> 3; 3490 3491done: 3492 qp_attr->cur_qp_state = qp_attr->qp_state; 3493 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt; 3494 qp_attr->cap.max_recv_sge = qp->rq.max_gs; 3495 3496 if (!ibqp->uobject) { 3497 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt; 3498 qp_attr->cap.max_send_sge = qp->sq.max_gs; 3499 } else { 3500 qp_attr->cap.max_send_wr = 0; 3501 qp_attr->cap.max_send_sge = 0; 3502 } 3503 3504 /* 3505 * We don't support inline sends for kernel QPs (yet), and we 3506 * don't know what userspace's value should be. 3507 */ 3508 qp_attr->cap.max_inline_data = 0; 3509 3510 qp_init_attr->cap = qp_attr->cap; 3511 3512 qp_init_attr->create_flags = 0; 3513 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) 3514 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK; 3515 3516 if (qp->flags & MLX4_IB_QP_LSO) 3517 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO; 3518 3519 if (qp->flags & MLX4_IB_QP_NETIF) 3520 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP; 3521 3522 qp_init_attr->sq_sig_type = 3523 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ? 3524 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR; 3525 3526out: 3527 mutex_unlock(&qp->mutex); 3528 return err; 3529} 3530 3531