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 46 #include <dev/mlx4/cmd.h> 47 #include <dev/mlx4/qp.h> 48 #include <dev/mlx4/driver.h> 49 #include <linux/io.h> 50 51 #include "mlx4_ib.h" 52 #include <rdma/mlx4-abi.h> 53 54 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, 55 struct mlx4_ib_cq *recv_cq); 56 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, 57 struct mlx4_ib_cq *recv_cq); 58 59 enum { 60 MLX4_IB_ACK_REQ_FREQ = 8, 61 }; 62 63 enum { 64 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83, 65 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f, 66 MLX4_IB_LINK_TYPE_IB = 0, 67 MLX4_IB_LINK_TYPE_ETH = 1 68 }; 69 70 enum { 71 /* 72 * Largest possible UD header: send with GRH and immediate 73 * data plus 18 bytes for an Ethernet header with VLAN/802.1Q 74 * tag. (LRH would only use 8 bytes, so Ethernet is the 75 * biggest case) 76 */ 77 MLX4_IB_UD_HEADER_SIZE = 82, 78 MLX4_IB_LSO_HEADER_SPARE = 128, 79 }; 80 81 enum { 82 MLX4_IB_IBOE_ETHERTYPE = 0x8915 83 }; 84 85 struct mlx4_ib_sqp { 86 struct mlx4_ib_qp qp; 87 int pkey_index; 88 u32 qkey; 89 u32 send_psn; 90 struct ib_ud_header ud_header; 91 u8 header_buf[MLX4_IB_UD_HEADER_SIZE]; 92 struct ib_qp *roce_v2_gsi; 93 }; 94 95 enum { 96 MLX4_IB_MIN_SQ_STRIDE = 6, 97 MLX4_IB_CACHE_LINE_SIZE = 64, 98 }; 99 100 enum { 101 MLX4_RAW_QP_MTU = 7, 102 MLX4_RAW_QP_MSGMAX = 31, 103 }; 104 105 #ifndef ETH_ALEN 106 #define ETH_ALEN 6 107 #endif 108 109 static const __be32 mlx4_ib_opcode[] = { 110 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND), 111 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO), 112 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM), 113 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE), 114 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM), 115 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ), 116 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS), 117 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA), 118 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL), 119 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL), 120 [IB_WR_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR), 121 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS), 122 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA), 123 }; 124 125 static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp) 126 { 127 return container_of(mqp, struct mlx4_ib_sqp, qp); 128 } 129 130 static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 131 { 132 if (!mlx4_is_master(dev->dev)) 133 return 0; 134 135 return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn && 136 qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn + 137 8 * MLX4_MFUNC_MAX; 138 } 139 140 static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 141 { 142 int proxy_sqp = 0; 143 int real_sqp = 0; 144 int i; 145 /* PPF or Native -- real SQP */ 146 real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) && 147 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn && 148 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3); 149 if (real_sqp) 150 return 1; 151 /* VF or PF -- proxy SQP */ 152 if (mlx4_is_mfunc(dev->dev)) { 153 for (i = 0; i < dev->dev->caps.num_ports; i++) { 154 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i] || 155 qp->mqp.qpn == dev->dev->caps.qp1_proxy[i]) { 156 proxy_sqp = 1; 157 break; 158 } 159 } 160 } 161 if (proxy_sqp) 162 return 1; 163 164 return !!(qp->flags & MLX4_IB_ROCE_V2_GSI_QP); 165 } 166 167 /* used for INIT/CLOSE port logic */ 168 static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 169 { 170 int proxy_qp0 = 0; 171 int real_qp0 = 0; 172 int i; 173 /* PPF or Native -- real QP0 */ 174 real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) && 175 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn && 176 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1); 177 if (real_qp0) 178 return 1; 179 /* VF or PF -- proxy QP0 */ 180 if (mlx4_is_mfunc(dev->dev)) { 181 for (i = 0; i < dev->dev->caps.num_ports; i++) { 182 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i]) { 183 proxy_qp0 = 1; 184 break; 185 } 186 } 187 } 188 return proxy_qp0; 189 } 190 191 static void *get_wqe(struct mlx4_ib_qp *qp, int offset) 192 { 193 return mlx4_buf_offset(&qp->buf, offset); 194 } 195 196 static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n) 197 { 198 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift)); 199 } 200 201 static void *get_send_wqe(struct mlx4_ib_qp *qp, int n) 202 { 203 return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift)); 204 } 205 206 /* 207 * Stamp a SQ WQE so that it is invalid if prefetched by marking the 208 * first four bytes of every 64 byte chunk with 209 * 0x7FFFFFF | (invalid_ownership_value << 31). 210 * 211 * When the max work request size is less than or equal to the WQE 212 * basic block size, as an optimization, we can stamp all WQEs with 213 * 0xffffffff, and skip the very first chunk of each WQE. 214 */ 215 static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size) 216 { 217 __be32 *wqe; 218 int i; 219 int s; 220 int ind; 221 void *buf; 222 __be32 stamp; 223 struct mlx4_wqe_ctrl_seg *ctrl; 224 225 if (qp->sq_max_wqes_per_wr > 1) { 226 s = roundup(size, 1U << qp->sq.wqe_shift); 227 for (i = 0; i < s; i += 64) { 228 ind = (i >> qp->sq.wqe_shift) + n; 229 stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) : 230 cpu_to_be32(0xffffffff); 231 buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1)); 232 wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1)); 233 *wqe = stamp; 234 } 235 } else { 236 ctrl = buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1)); 237 s = (ctrl->fence_size & 0x3f) << 4; 238 for (i = 64; i < s; i += 64) { 239 wqe = buf + i; 240 *wqe = cpu_to_be32(0xffffffff); 241 } 242 } 243 } 244 245 static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size) 246 { 247 struct mlx4_wqe_ctrl_seg *ctrl; 248 struct mlx4_wqe_inline_seg *inl; 249 void *wqe; 250 int s; 251 252 ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1)); 253 s = sizeof(struct mlx4_wqe_ctrl_seg); 254 255 if (qp->ibqp.qp_type == IB_QPT_UD) { 256 struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl; 257 struct mlx4_av *av = (struct mlx4_av *)dgram->av; 258 memset(dgram, 0, sizeof *dgram); 259 av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn); 260 s += sizeof(struct mlx4_wqe_datagram_seg); 261 } 262 263 /* Pad the remainder of the WQE with an inline data segment. */ 264 if (size > s) { 265 inl = wqe + s; 266 inl->byte_count = cpu_to_be32(1U << 31 | (size - s - sizeof *inl)); 267 } 268 ctrl->srcrb_flags = 0; 269 ctrl->fence_size = size / 16; 270 /* 271 * Make sure descriptor is fully written before setting ownership bit 272 * (because HW can start executing as soon as we do). 273 */ 274 wmb(); 275 276 ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) | 277 (n & qp->sq.wqe_cnt ? cpu_to_be32(1U << 31) : 0); 278 279 stamp_send_wqe(qp, n + qp->sq_spare_wqes, size); 280 } 281 282 /* Post NOP WQE to prevent wrap-around in the middle of WR */ 283 static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind) 284 { 285 unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1)); 286 if (unlikely(s < qp->sq_max_wqes_per_wr)) { 287 post_nop_wqe(qp, ind, s << qp->sq.wqe_shift); 288 ind += s; 289 } 290 return ind; 291 } 292 293 static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type) 294 { 295 struct ib_event event; 296 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp; 297 298 if (type == MLX4_EVENT_TYPE_PATH_MIG) 299 to_mibqp(qp)->port = to_mibqp(qp)->alt_port; 300 301 if (ibqp->event_handler) { 302 event.device = ibqp->device; 303 event.element.qp = ibqp; 304 switch (type) { 305 case MLX4_EVENT_TYPE_PATH_MIG: 306 event.event = IB_EVENT_PATH_MIG; 307 break; 308 case MLX4_EVENT_TYPE_COMM_EST: 309 event.event = IB_EVENT_COMM_EST; 310 break; 311 case MLX4_EVENT_TYPE_SQ_DRAINED: 312 event.event = IB_EVENT_SQ_DRAINED; 313 break; 314 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE: 315 event.event = IB_EVENT_QP_LAST_WQE_REACHED; 316 break; 317 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR: 318 event.event = IB_EVENT_QP_FATAL; 319 break; 320 case MLX4_EVENT_TYPE_PATH_MIG_FAILED: 321 event.event = IB_EVENT_PATH_MIG_ERR; 322 break; 323 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR: 324 event.event = IB_EVENT_QP_REQ_ERR; 325 break; 326 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR: 327 event.event = IB_EVENT_QP_ACCESS_ERR; 328 break; 329 default: 330 pr_warn("Unexpected event type %d " 331 "on QP %06x\n", type, qp->qpn); 332 return; 333 } 334 335 ibqp->event_handler(&event, ibqp->qp_context); 336 } 337 } 338 339 static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags) 340 { 341 /* 342 * UD WQEs must have a datagram segment. 343 * RC and UC WQEs might have a remote address segment. 344 * MLX WQEs need two extra inline data segments (for the UD 345 * header and space for the ICRC). 346 */ 347 switch (type) { 348 case MLX4_IB_QPT_UD: 349 return sizeof (struct mlx4_wqe_ctrl_seg) + 350 sizeof (struct mlx4_wqe_datagram_seg) + 351 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0); 352 case MLX4_IB_QPT_PROXY_SMI_OWNER: 353 case MLX4_IB_QPT_PROXY_SMI: 354 case MLX4_IB_QPT_PROXY_GSI: 355 return sizeof (struct mlx4_wqe_ctrl_seg) + 356 sizeof (struct mlx4_wqe_datagram_seg) + 64; 357 case MLX4_IB_QPT_TUN_SMI_OWNER: 358 case MLX4_IB_QPT_TUN_GSI: 359 return sizeof (struct mlx4_wqe_ctrl_seg) + 360 sizeof (struct mlx4_wqe_datagram_seg); 361 362 case MLX4_IB_QPT_UC: 363 return sizeof (struct mlx4_wqe_ctrl_seg) + 364 sizeof (struct mlx4_wqe_raddr_seg); 365 case MLX4_IB_QPT_RC: 366 return sizeof (struct mlx4_wqe_ctrl_seg) + 367 sizeof (struct mlx4_wqe_masked_atomic_seg) + 368 sizeof (struct mlx4_wqe_raddr_seg); 369 case MLX4_IB_QPT_SMI: 370 case MLX4_IB_QPT_GSI: 371 return sizeof (struct mlx4_wqe_ctrl_seg) + 372 ALIGN(MLX4_IB_UD_HEADER_SIZE + 373 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE, 374 MLX4_INLINE_ALIGN) * 375 sizeof (struct mlx4_wqe_inline_seg), 376 sizeof (struct mlx4_wqe_data_seg)) + 377 ALIGN(4 + 378 sizeof (struct mlx4_wqe_inline_seg), 379 sizeof (struct mlx4_wqe_data_seg)); 380 default: 381 return sizeof (struct mlx4_wqe_ctrl_seg); 382 } 383 } 384 385 static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, 386 int is_user, int has_rq, struct mlx4_ib_qp *qp) 387 { 388 /* Sanity check RQ size before proceeding */ 389 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE || 390 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg)) 391 return -EINVAL; 392 393 if (!has_rq) { 394 if (cap->max_recv_wr) 395 return -EINVAL; 396 397 qp->rq.wqe_cnt = qp->rq.max_gs = 0; 398 } else { 399 /* HW requires >= 1 RQ entry with >= 1 gather entry */ 400 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge)) 401 return -EINVAL; 402 403 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr)); 404 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge)); 405 qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg)); 406 } 407 408 /* leave userspace return values as they were, so as not to break ABI */ 409 if (is_user) { 410 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt; 411 cap->max_recv_sge = qp->rq.max_gs; 412 } else { 413 cap->max_recv_wr = qp->rq.max_post = 414 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt); 415 cap->max_recv_sge = min(qp->rq.max_gs, 416 min(dev->dev->caps.max_sq_sg, 417 dev->dev->caps.max_rq_sg)); 418 } 419 420 return 0; 421 } 422 423 static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, 424 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp, 425 bool shrink_wqe) 426 { 427 int s; 428 429 /* Sanity check SQ size before proceeding */ 430 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) || 431 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) || 432 cap->max_inline_data + send_wqe_overhead(type, qp->flags) + 433 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz) 434 return -EINVAL; 435 436 /* 437 * For MLX transport we need 2 extra S/G entries: 438 * one for the header and one for the checksum at the end 439 */ 440 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI || 441 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) && 442 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg) 443 return -EINVAL; 444 445 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg), 446 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) + 447 send_wqe_overhead(type, qp->flags); 448 449 if (s > dev->dev->caps.max_sq_desc_sz) 450 return -EINVAL; 451 452 /* 453 * Hermon supports shrinking WQEs, such that a single work 454 * request can include multiple units of 1 << wqe_shift. This 455 * way, work requests can differ in size, and do not have to 456 * be a power of 2 in size, saving memory and speeding up send 457 * WR posting. Unfortunately, if we do this then the 458 * wqe_index field in CQEs can't be used to look up the WR ID 459 * anymore, so we do this only if selective signaling is off. 460 * 461 * Further, on 32-bit platforms, we can't use vmap() to make 462 * the QP buffer virtually contiguous. Thus we have to use 463 * constant-sized WRs to make sure a WR is always fully within 464 * a single page-sized chunk. 465 * 466 * Finally, we use NOP work requests to pad the end of the 467 * work queue, to avoid wrap-around in the middle of WR. We 468 * set NEC bit to avoid getting completions with error for 469 * these NOP WRs, but since NEC is only supported starting 470 * with firmware 2.2.232, we use constant-sized WRs for older 471 * firmware. 472 * 473 * And, since MLX QPs only support SEND, we use constant-sized 474 * WRs in this case. 475 * 476 * We look for the smallest value of wqe_shift such that the 477 * resulting number of wqes does not exceed device 478 * capabilities. 479 * 480 * We set WQE size to at least 64 bytes, this way stamping 481 * invalidates each WQE. 482 */ 483 if (shrink_wqe && dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC && 484 qp->sq_signal_bits && BITS_PER_LONG == 64 && 485 type != MLX4_IB_QPT_SMI && type != MLX4_IB_QPT_GSI && 486 !(type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_PROXY_SMI | 487 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) 488 qp->sq.wqe_shift = ilog2(64); 489 else 490 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s)); 491 492 for (;;) { 493 qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift); 494 495 /* 496 * We need to leave 2 KB + 1 WR of headroom in the SQ to 497 * allow HW to prefetch. 498 */ 499 qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr; 500 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr * 501 qp->sq_max_wqes_per_wr + 502 qp->sq_spare_wqes); 503 504 if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes) 505 break; 506 507 if (qp->sq_max_wqes_per_wr <= 1) 508 return -EINVAL; 509 510 ++qp->sq.wqe_shift; 511 } 512 513 qp->sq.max_gs = (min(dev->dev->caps.max_sq_desc_sz, 514 (qp->sq_max_wqes_per_wr << qp->sq.wqe_shift)) - 515 send_wqe_overhead(type, qp->flags)) / 516 sizeof (struct mlx4_wqe_data_seg); 517 518 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + 519 (qp->sq.wqe_cnt << qp->sq.wqe_shift); 520 if (qp->rq.wqe_shift > qp->sq.wqe_shift) { 521 qp->rq.offset = 0; 522 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift; 523 } else { 524 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift; 525 qp->sq.offset = 0; 526 } 527 528 cap->max_send_wr = qp->sq.max_post = 529 (qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr; 530 cap->max_send_sge = min(qp->sq.max_gs, 531 min(dev->dev->caps.max_sq_sg, 532 dev->dev->caps.max_rq_sg)); 533 /* We don't support inline sends for kernel QPs (yet) */ 534 cap->max_inline_data = 0; 535 536 return 0; 537 } 538 539 static int set_user_sq_size(struct mlx4_ib_dev *dev, 540 struct mlx4_ib_qp *qp, 541 struct mlx4_ib_create_qp *ucmd) 542 { 543 /* Sanity check SQ size before proceeding */ 544 if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes || 545 ucmd->log_sq_stride > 546 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) || 547 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE) 548 return -EINVAL; 549 550 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count; 551 qp->sq.wqe_shift = ucmd->log_sq_stride; 552 553 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + 554 (qp->sq.wqe_cnt << qp->sq.wqe_shift); 555 556 return 0; 557 } 558 559 static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp) 560 { 561 int i; 562 563 qp->sqp_proxy_rcv = 564 kmalloc(sizeof (struct mlx4_ib_buf) * qp->rq.wqe_cnt, 565 GFP_KERNEL); 566 if (!qp->sqp_proxy_rcv) 567 return -ENOMEM; 568 for (i = 0; i < qp->rq.wqe_cnt; i++) { 569 qp->sqp_proxy_rcv[i].addr = 570 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr), 571 GFP_KERNEL); 572 if (!qp->sqp_proxy_rcv[i].addr) 573 goto err; 574 qp->sqp_proxy_rcv[i].map = 575 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr, 576 sizeof (struct mlx4_ib_proxy_sqp_hdr), 577 DMA_FROM_DEVICE); 578 if (ib_dma_mapping_error(dev, qp->sqp_proxy_rcv[i].map)) { 579 kfree(qp->sqp_proxy_rcv[i].addr); 580 goto err; 581 } 582 } 583 return 0; 584 585 err: 586 while (i > 0) { 587 --i; 588 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map, 589 sizeof (struct mlx4_ib_proxy_sqp_hdr), 590 DMA_FROM_DEVICE); 591 kfree(qp->sqp_proxy_rcv[i].addr); 592 } 593 kfree(qp->sqp_proxy_rcv); 594 qp->sqp_proxy_rcv = NULL; 595 return -ENOMEM; 596 } 597 598 static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp) 599 { 600 int i; 601 602 for (i = 0; i < qp->rq.wqe_cnt; i++) { 603 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map, 604 sizeof (struct mlx4_ib_proxy_sqp_hdr), 605 DMA_FROM_DEVICE); 606 kfree(qp->sqp_proxy_rcv[i].addr); 607 } 608 kfree(qp->sqp_proxy_rcv); 609 } 610 611 static int qp_has_rq(struct ib_qp_init_attr *attr) 612 { 613 if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT) 614 return 0; 615 616 return !attr->srq; 617 } 618 619 static int qp0_enabled_vf(struct mlx4_dev *dev, int qpn) 620 { 621 int i; 622 for (i = 0; i < dev->caps.num_ports; i++) { 623 if (qpn == dev->caps.qp0_proxy[i]) 624 return !!dev->caps.qp0_qkey[i]; 625 } 626 return 0; 627 } 628 629 static void mlx4_ib_free_qp_counter(struct mlx4_ib_dev *dev, 630 struct mlx4_ib_qp *qp) 631 { 632 mutex_lock(&dev->counters_table[qp->port - 1].mutex); 633 mlx4_counter_free(dev->dev, qp->counter_index->index); 634 list_del(&qp->counter_index->list); 635 mutex_unlock(&dev->counters_table[qp->port - 1].mutex); 636 637 kfree(qp->counter_index); 638 qp->counter_index = NULL; 639 } 640 641 static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd, 642 struct ib_qp_init_attr *init_attr, 643 struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp, 644 gfp_t gfp) 645 { 646 int qpn; 647 int err; 648 struct ib_qp_cap backup_cap; 649 struct mlx4_ib_sqp *sqp; 650 struct mlx4_ib_qp *qp; 651 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type; 652 struct mlx4_ib_cq *mcq; 653 unsigned long flags; 654 655 /* When tunneling special qps, we use a plain UD qp */ 656 if (sqpn) { 657 if (mlx4_is_mfunc(dev->dev) && 658 (!mlx4_is_master(dev->dev) || 659 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) { 660 if (init_attr->qp_type == IB_QPT_GSI) 661 qp_type = MLX4_IB_QPT_PROXY_GSI; 662 else { 663 if (mlx4_is_master(dev->dev) || 664 qp0_enabled_vf(dev->dev, sqpn)) 665 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER; 666 else 667 qp_type = MLX4_IB_QPT_PROXY_SMI; 668 } 669 } 670 qpn = sqpn; 671 /* add extra sg entry for tunneling */ 672 init_attr->cap.max_recv_sge++; 673 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) { 674 struct mlx4_ib_qp_tunnel_init_attr *tnl_init = 675 container_of(init_attr, 676 struct mlx4_ib_qp_tunnel_init_attr, init_attr); 677 if ((tnl_init->proxy_qp_type != IB_QPT_SMI && 678 tnl_init->proxy_qp_type != IB_QPT_GSI) || 679 !mlx4_is_master(dev->dev)) 680 return -EINVAL; 681 if (tnl_init->proxy_qp_type == IB_QPT_GSI) 682 qp_type = MLX4_IB_QPT_TUN_GSI; 683 else if (tnl_init->slave == mlx4_master_func_num(dev->dev) || 684 mlx4_vf_smi_enabled(dev->dev, tnl_init->slave, 685 tnl_init->port)) 686 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER; 687 else 688 qp_type = MLX4_IB_QPT_TUN_SMI; 689 /* we are definitely in the PPF here, since we are creating 690 * tunnel QPs. base_tunnel_sqpn is therefore valid. */ 691 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave 692 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1; 693 sqpn = qpn; 694 } 695 696 if (!*caller_qp) { 697 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI || 698 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER | 699 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) { 700 sqp = kzalloc(sizeof (struct mlx4_ib_sqp), gfp); 701 if (!sqp) 702 return -ENOMEM; 703 qp = &sqp->qp; 704 qp->pri.vid = 0xFFFF; 705 qp->alt.vid = 0xFFFF; 706 } else { 707 qp = kzalloc(sizeof (struct mlx4_ib_qp), gfp); 708 if (!qp) 709 return -ENOMEM; 710 qp->pri.vid = 0xFFFF; 711 qp->alt.vid = 0xFFFF; 712 } 713 } else 714 qp = *caller_qp; 715 716 qp->mlx4_ib_qp_type = qp_type; 717 718 mutex_init(&qp->mutex); 719 spin_lock_init(&qp->sq.lock); 720 spin_lock_init(&qp->rq.lock); 721 INIT_LIST_HEAD(&qp->gid_list); 722 INIT_LIST_HEAD(&qp->steering_rules); 723 724 qp->state = IB_QPS_RESET; 725 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) 726 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); 727 728 err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, qp_has_rq(init_attr), qp); 729 if (err) 730 goto err; 731 732 if (pd->uobject) { 733 struct mlx4_ib_create_qp ucmd; 734 735 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { 736 err = -EFAULT; 737 goto err; 738 } 739 740 qp->sq_no_prefetch = ucmd.sq_no_prefetch; 741 742 err = set_user_sq_size(dev, qp, &ucmd); 743 if (err) 744 goto err; 745 746 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, 747 qp->buf_size, 0, 0); 748 if (IS_ERR(qp->umem)) { 749 err = PTR_ERR(qp->umem); 750 goto err; 751 } 752 753 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem), 754 ilog2(qp->umem->page_size), &qp->mtt); 755 if (err) 756 goto err_buf; 757 758 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem); 759 if (err) 760 goto err_mtt; 761 762 if (qp_has_rq(init_attr)) { 763 err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context), 764 ucmd.db_addr, &qp->db); 765 if (err) 766 goto err_mtt; 767 } 768 } else { 769 qp->sq_no_prefetch = 0; 770 771 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO) 772 qp->flags |= MLX4_IB_QP_LSO; 773 774 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) { 775 if (dev->steering_support == 776 MLX4_STEERING_MODE_DEVICE_MANAGED) 777 qp->flags |= MLX4_IB_QP_NETIF; 778 else 779 goto err; 780 } 781 782 memcpy(&backup_cap, &init_attr->cap, sizeof(backup_cap)); 783 err = set_kernel_sq_size(dev, &init_attr->cap, 784 qp_type, qp, true); 785 if (err) 786 goto err; 787 788 if (qp_has_rq(init_attr)) { 789 err = mlx4_db_alloc(dev->dev, &qp->db, 0, gfp); 790 if (err) 791 goto err; 792 793 *qp->db.db = 0; 794 } 795 796 if (mlx4_buf_alloc(dev->dev, qp->buf_size, qp->buf_size, 797 &qp->buf, gfp)) { 798 memcpy(&init_attr->cap, &backup_cap, 799 sizeof(backup_cap)); 800 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, 801 qp, false); 802 if (err) 803 goto err_db; 804 805 if (mlx4_buf_alloc(dev->dev, qp->buf_size, 806 PAGE_SIZE * 2, &qp->buf, gfp)) { 807 err = -ENOMEM; 808 goto err_db; 809 } 810 } 811 812 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift, 813 &qp->mtt); 814 if (err) 815 goto err_buf; 816 817 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf, gfp); 818 if (err) 819 goto err_mtt; 820 821 qp->sq.wrid = kmalloc_array(qp->sq.wqe_cnt, sizeof(u64), 822 gfp | __GFP_NOWARN); 823 if (!qp->sq.wrid) 824 qp->sq.wrid = __vmalloc(qp->sq.wqe_cnt * sizeof(u64), 825 gfp, 0 /*PAGE_KERNEL*/); 826 qp->rq.wrid = kmalloc_array(qp->rq.wqe_cnt, sizeof(u64), 827 gfp | __GFP_NOWARN); 828 if (!qp->rq.wrid) 829 qp->rq.wrid = __vmalloc(qp->rq.wqe_cnt * sizeof(u64), 830 gfp, 0 /*PAGE_KERNEL*/); 831 if (!qp->sq.wrid || !qp->rq.wrid) { 832 err = -ENOMEM; 833 goto err_wrid; 834 } 835 } 836 837 if (sqpn) { 838 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 839 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) { 840 if (alloc_proxy_bufs(pd->device, qp)) { 841 err = -ENOMEM; 842 goto err_wrid; 843 } 844 } 845 } else { 846 /* Raw packet QPNs may not have bits 6,7 set in their qp_num; 847 * otherwise, the WQE BlueFlame setup flow wrongly causes 848 * VLAN insertion. */ 849 if (init_attr->qp_type == IB_QPT_RAW_PACKET) 850 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn, 851 (init_attr->cap.max_send_wr ? 852 MLX4_RESERVE_ETH_BF_QP : 0) | 853 (init_attr->cap.max_recv_wr ? 854 MLX4_RESERVE_A0_QP : 0)); 855 else 856 if (qp->flags & MLX4_IB_QP_NETIF) 857 err = mlx4_ib_steer_qp_alloc(dev, 1, &qpn); 858 else 859 err = mlx4_qp_reserve_range(dev->dev, 1, 1, 860 &qpn, 0); 861 if (err) 862 goto err_proxy; 863 } 864 865 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) 866 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK; 867 868 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp, gfp); 869 if (err) 870 goto err_qpn; 871 872 if (init_attr->qp_type == IB_QPT_XRC_TGT) 873 qp->mqp.qpn |= (1 << 23); 874 875 /* 876 * Hardware wants QPN written in big-endian order (after 877 * shifting) for send doorbell. Precompute this value to save 878 * a little bit when posting sends. 879 */ 880 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8); 881 882 qp->mqp.event = mlx4_ib_qp_event; 883 if (!*caller_qp) 884 *caller_qp = qp; 885 886 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags); 887 mlx4_ib_lock_cqs(to_mcq(init_attr->send_cq), 888 to_mcq(init_attr->recv_cq)); 889 /* Maintain device to QPs access, needed for further handling 890 * via reset flow 891 */ 892 list_add_tail(&qp->qps_list, &dev->qp_list); 893 /* Maintain CQ to QPs access, needed for further handling 894 * via reset flow 895 */ 896 mcq = to_mcq(init_attr->send_cq); 897 list_add_tail(&qp->cq_send_list, &mcq->send_qp_list); 898 mcq = to_mcq(init_attr->recv_cq); 899 list_add_tail(&qp->cq_recv_list, &mcq->recv_qp_list); 900 mlx4_ib_unlock_cqs(to_mcq(init_attr->send_cq), 901 to_mcq(init_attr->recv_cq)); 902 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags); 903 return 0; 904 905 err_qpn: 906 if (!sqpn) { 907 if (qp->flags & MLX4_IB_QP_NETIF) 908 mlx4_ib_steer_qp_free(dev, qpn, 1); 909 else 910 mlx4_qp_release_range(dev->dev, qpn, 1); 911 } 912 err_proxy: 913 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI) 914 free_proxy_bufs(pd->device, qp); 915 err_wrid: 916 if (pd->uobject) { 917 if (qp_has_rq(init_attr)) 918 mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db); 919 } else { 920 kvfree(qp->sq.wrid); 921 kvfree(qp->rq.wrid); 922 } 923 924 err_mtt: 925 mlx4_mtt_cleanup(dev->dev, &qp->mtt); 926 927 err_buf: 928 if (pd->uobject) 929 ib_umem_release(qp->umem); 930 else 931 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); 932 933 err_db: 934 if (!pd->uobject && qp_has_rq(init_attr)) 935 mlx4_db_free(dev->dev, &qp->db); 936 937 err: 938 if (!*caller_qp) 939 kfree(qp); 940 return err; 941 } 942 943 static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state) 944 { 945 switch (state) { 946 case IB_QPS_RESET: return MLX4_QP_STATE_RST; 947 case IB_QPS_INIT: return MLX4_QP_STATE_INIT; 948 case IB_QPS_RTR: return MLX4_QP_STATE_RTR; 949 case IB_QPS_RTS: return MLX4_QP_STATE_RTS; 950 case IB_QPS_SQD: return MLX4_QP_STATE_SQD; 951 case IB_QPS_SQE: return MLX4_QP_STATE_SQER; 952 case IB_QPS_ERR: return MLX4_QP_STATE_ERR; 953 default: return -1; 954 } 955 } 956 957 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) 958 __acquires(&send_cq->lock) __acquires(&recv_cq->lock) 959 { 960 if (send_cq == recv_cq) { 961 spin_lock(&send_cq->lock); 962 __acquire(&recv_cq->lock); 963 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { 964 spin_lock(&send_cq->lock); 965 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING); 966 } else { 967 spin_lock(&recv_cq->lock); 968 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING); 969 } 970 } 971 972 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) 973 __releases(&send_cq->lock) __releases(&recv_cq->lock) 974 { 975 if (send_cq == recv_cq) { 976 __release(&recv_cq->lock); 977 spin_unlock(&send_cq->lock); 978 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { 979 spin_unlock(&recv_cq->lock); 980 spin_unlock(&send_cq->lock); 981 } else { 982 spin_unlock(&send_cq->lock); 983 spin_unlock(&recv_cq->lock); 984 } 985 } 986 987 static void del_gid_entries(struct mlx4_ib_qp *qp) 988 { 989 struct mlx4_ib_gid_entry *ge, *tmp; 990 991 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) { 992 list_del(&ge->list); 993 kfree(ge); 994 } 995 } 996 997 static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp) 998 { 999 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT) 1000 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd); 1001 else 1002 return to_mpd(qp->ibqp.pd); 1003 } 1004 1005 static void get_cqs(struct mlx4_ib_qp *qp, 1006 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq) 1007 { 1008 switch (qp->ibqp.qp_type) { 1009 case IB_QPT_XRC_TGT: 1010 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq); 1011 *recv_cq = *send_cq; 1012 break; 1013 case IB_QPT_XRC_INI: 1014 *send_cq = to_mcq(qp->ibqp.send_cq); 1015 *recv_cq = *send_cq; 1016 break; 1017 default: 1018 *send_cq = to_mcq(qp->ibqp.send_cq); 1019 *recv_cq = to_mcq(qp->ibqp.recv_cq); 1020 break; 1021 } 1022 } 1023 1024 static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, 1025 int is_user) 1026 { 1027 struct mlx4_ib_cq *send_cq, *recv_cq; 1028 unsigned long flags; 1029 1030 if (qp->state != IB_QPS_RESET) { 1031 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state), 1032 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp)) 1033 pr_warn("modify QP %06x to RESET failed.\n", 1034 qp->mqp.qpn); 1035 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) { 1036 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 1037 qp->pri.smac = 0; 1038 qp->pri.smac_port = 0; 1039 } 1040 if (qp->alt.smac) { 1041 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 1042 qp->alt.smac = 0; 1043 } 1044 if (qp->pri.vid < 0x1000) { 1045 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid); 1046 qp->pri.vid = 0xFFFF; 1047 qp->pri.candidate_vid = 0xFFFF; 1048 qp->pri.update_vid = 0; 1049 } 1050 if (qp->alt.vid < 0x1000) { 1051 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid); 1052 qp->alt.vid = 0xFFFF; 1053 qp->alt.candidate_vid = 0xFFFF; 1054 qp->alt.update_vid = 0; 1055 } 1056 } 1057 1058 get_cqs(qp, &send_cq, &recv_cq); 1059 1060 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags); 1061 mlx4_ib_lock_cqs(send_cq, recv_cq); 1062 1063 /* del from lists under both locks above to protect reset flow paths */ 1064 list_del(&qp->qps_list); 1065 list_del(&qp->cq_send_list); 1066 list_del(&qp->cq_recv_list); 1067 if (!is_user) { 1068 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn, 1069 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL); 1070 if (send_cq != recv_cq) 1071 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); 1072 } 1073 1074 mlx4_qp_remove(dev->dev, &qp->mqp); 1075 1076 mlx4_ib_unlock_cqs(send_cq, recv_cq); 1077 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags); 1078 1079 mlx4_qp_free(dev->dev, &qp->mqp); 1080 1081 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp)) { 1082 if (qp->flags & MLX4_IB_QP_NETIF) 1083 mlx4_ib_steer_qp_free(dev, qp->mqp.qpn, 1); 1084 else 1085 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1); 1086 } 1087 1088 mlx4_mtt_cleanup(dev->dev, &qp->mtt); 1089 1090 if (is_user) { 1091 if (qp->rq.wqe_cnt) 1092 mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context), 1093 &qp->db); 1094 ib_umem_release(qp->umem); 1095 } else { 1096 kvfree(qp->sq.wrid); 1097 kvfree(qp->rq.wrid); 1098 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 1099 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) 1100 free_proxy_bufs(&dev->ib_dev, qp); 1101 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); 1102 if (qp->rq.wqe_cnt) 1103 mlx4_db_free(dev->dev, &qp->db); 1104 } 1105 1106 del_gid_entries(qp); 1107 } 1108 1109 static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr) 1110 { 1111 /* Native or PPF */ 1112 if (!mlx4_is_mfunc(dev->dev) || 1113 (mlx4_is_master(dev->dev) && 1114 attr->create_flags & MLX4_IB_SRIOV_SQP)) { 1115 return dev->dev->phys_caps.base_sqpn + 1116 (attr->qp_type == IB_QPT_SMI ? 0 : 2) + 1117 attr->port_num - 1; 1118 } 1119 /* PF or VF -- creating proxies */ 1120 if (attr->qp_type == IB_QPT_SMI) 1121 return dev->dev->caps.qp0_proxy[attr->port_num - 1]; 1122 else 1123 return dev->dev->caps.qp1_proxy[attr->port_num - 1]; 1124 } 1125 1126 static struct ib_qp *_mlx4_ib_create_qp(struct ib_pd *pd, 1127 struct ib_qp_init_attr *init_attr, 1128 struct ib_udata *udata) 1129 { 1130 struct mlx4_ib_qp *qp = NULL; 1131 int err; 1132 int sup_u_create_flags = MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK; 1133 u16 xrcdn = 0; 1134 gfp_t gfp; 1135 1136 gfp = (init_attr->create_flags & MLX4_IB_QP_CREATE_USE_GFP_NOIO) ? 1137 GFP_NOIO : GFP_KERNEL; 1138 /* 1139 * We only support LSO, vendor flag1, and multicast loopback blocking, 1140 * and only for kernel UD QPs. 1141 */ 1142 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO | 1143 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK | 1144 MLX4_IB_SRIOV_TUNNEL_QP | 1145 MLX4_IB_SRIOV_SQP | 1146 MLX4_IB_QP_NETIF | 1147 MLX4_IB_QP_CREATE_ROCE_V2_GSI | 1148 MLX4_IB_QP_CREATE_USE_GFP_NOIO)) 1149 return ERR_PTR(-EINVAL); 1150 1151 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) { 1152 if (init_attr->qp_type != IB_QPT_UD) 1153 return ERR_PTR(-EINVAL); 1154 } 1155 1156 if (init_attr->create_flags) { 1157 if (udata && init_attr->create_flags & ~(sup_u_create_flags)) 1158 return ERR_PTR(-EINVAL); 1159 1160 if ((init_attr->create_flags & ~(MLX4_IB_SRIOV_SQP | 1161 MLX4_IB_QP_CREATE_USE_GFP_NOIO | 1162 MLX4_IB_QP_CREATE_ROCE_V2_GSI | 1163 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) && 1164 init_attr->qp_type != IB_QPT_UD) || 1165 (init_attr->create_flags & MLX4_IB_SRIOV_SQP && 1166 init_attr->qp_type > IB_QPT_GSI) || 1167 (init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI && 1168 init_attr->qp_type != IB_QPT_GSI)) 1169 return ERR_PTR(-EINVAL); 1170 } 1171 1172 switch (init_attr->qp_type) { 1173 case IB_QPT_XRC_TGT: 1174 pd = to_mxrcd(init_attr->xrcd)->pd; 1175 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn; 1176 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq; 1177 /* fall through */ 1178 case IB_QPT_XRC_INI: 1179 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC)) 1180 return ERR_PTR(-ENOSYS); 1181 init_attr->recv_cq = init_attr->send_cq; 1182 /* fall through */ 1183 case IB_QPT_RC: 1184 case IB_QPT_UC: 1185 case IB_QPT_RAW_PACKET: 1186 qp = kzalloc(sizeof *qp, gfp); 1187 if (!qp) 1188 return ERR_PTR(-ENOMEM); 1189 qp->pri.vid = 0xFFFF; 1190 qp->alt.vid = 0xFFFF; 1191 /* fall through */ 1192 case IB_QPT_UD: 1193 { 1194 err = create_qp_common(to_mdev(pd->device), pd, init_attr, 1195 udata, 0, &qp, gfp); 1196 if (err) { 1197 kfree(qp); 1198 return ERR_PTR(err); 1199 } 1200 1201 qp->ibqp.qp_num = qp->mqp.qpn; 1202 qp->xrcdn = xrcdn; 1203 1204 break; 1205 } 1206 case IB_QPT_SMI: 1207 case IB_QPT_GSI: 1208 { 1209 int sqpn; 1210 1211 /* Userspace is not allowed to create special QPs: */ 1212 if (udata) 1213 return ERR_PTR(-EINVAL); 1214 if (init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI) { 1215 int res = mlx4_qp_reserve_range(to_mdev(pd->device)->dev, 1, 1, &sqpn, 0); 1216 1217 if (res) 1218 return ERR_PTR(res); 1219 } else { 1220 sqpn = get_sqp_num(to_mdev(pd->device), init_attr); 1221 } 1222 1223 err = create_qp_common(to_mdev(pd->device), pd, init_attr, udata, 1224 sqpn, 1225 &qp, gfp); 1226 if (err) 1227 return ERR_PTR(err); 1228 1229 qp->port = init_attr->port_num; 1230 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1231 init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI ? sqpn : 1; 1232 break; 1233 } 1234 default: 1235 /* Don't support raw QPs */ 1236 return ERR_PTR(-EINVAL); 1237 } 1238 1239 return &qp->ibqp; 1240 } 1241 1242 struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd, 1243 struct ib_qp_init_attr *init_attr, 1244 struct ib_udata *udata) { 1245 struct ib_device *device = pd ? pd->device : init_attr->xrcd->device; 1246 struct ib_qp *ibqp; 1247 struct mlx4_ib_dev *dev = to_mdev(device); 1248 1249 ibqp = _mlx4_ib_create_qp(pd, init_attr, udata); 1250 1251 if (!IS_ERR(ibqp) && 1252 (init_attr->qp_type == IB_QPT_GSI) && 1253 !(init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI)) { 1254 struct mlx4_ib_sqp *sqp = to_msqp((to_mqp(ibqp))); 1255 int is_eth = rdma_cap_eth_ah(&dev->ib_dev, init_attr->port_num); 1256 1257 if (is_eth && 1258 dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2) { 1259 init_attr->create_flags |= MLX4_IB_QP_CREATE_ROCE_V2_GSI; 1260 sqp->roce_v2_gsi = ib_create_qp(pd, init_attr); 1261 1262 if (IS_ERR(sqp->roce_v2_gsi)) { 1263 pr_err("Failed to create GSI QP for RoCEv2 (%ld)\n", PTR_ERR(sqp->roce_v2_gsi)); 1264 sqp->roce_v2_gsi = NULL; 1265 } else { 1266 sqp = to_msqp(to_mqp(sqp->roce_v2_gsi)); 1267 sqp->qp.flags |= MLX4_IB_ROCE_V2_GSI_QP; 1268 } 1269 1270 init_attr->create_flags &= ~MLX4_IB_QP_CREATE_ROCE_V2_GSI; 1271 } 1272 } 1273 return ibqp; 1274 } 1275 1276 static int _mlx4_ib_destroy_qp(struct ib_qp *qp) 1277 { 1278 struct mlx4_ib_dev *dev = to_mdev(qp->device); 1279 struct mlx4_ib_qp *mqp = to_mqp(qp); 1280 struct mlx4_ib_pd *pd; 1281 1282 if (is_qp0(dev, mqp)) 1283 mlx4_CLOSE_PORT(dev->dev, mqp->port); 1284 1285 if (dev->qp1_proxy[mqp->port - 1] == mqp) { 1286 mutex_lock(&dev->qp1_proxy_lock[mqp->port - 1]); 1287 dev->qp1_proxy[mqp->port - 1] = NULL; 1288 mutex_unlock(&dev->qp1_proxy_lock[mqp->port - 1]); 1289 } 1290 1291 if (mqp->counter_index) 1292 mlx4_ib_free_qp_counter(dev, mqp); 1293 1294 pd = get_pd(mqp); 1295 destroy_qp_common(dev, mqp, !!pd->ibpd.uobject); 1296 1297 if (is_sqp(dev, mqp)) 1298 kfree(to_msqp(mqp)); 1299 else 1300 kfree(mqp); 1301 1302 return 0; 1303 } 1304 1305 int mlx4_ib_destroy_qp(struct ib_qp *qp) 1306 { 1307 struct mlx4_ib_qp *mqp = to_mqp(qp); 1308 1309 if (mqp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) { 1310 struct mlx4_ib_sqp *sqp = to_msqp(mqp); 1311 1312 if (sqp->roce_v2_gsi) 1313 ib_destroy_qp(sqp->roce_v2_gsi); 1314 } 1315 1316 return _mlx4_ib_destroy_qp(qp); 1317 } 1318 1319 static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type) 1320 { 1321 switch (type) { 1322 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC; 1323 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC; 1324 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD; 1325 case MLX4_IB_QPT_XRC_INI: 1326 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC; 1327 case MLX4_IB_QPT_SMI: 1328 case MLX4_IB_QPT_GSI: 1329 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX; 1330 1331 case MLX4_IB_QPT_PROXY_SMI_OWNER: 1332 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ? 1333 MLX4_QP_ST_MLX : -1); 1334 case MLX4_IB_QPT_PROXY_SMI: 1335 case MLX4_IB_QPT_TUN_SMI: 1336 case MLX4_IB_QPT_PROXY_GSI: 1337 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ? 1338 MLX4_QP_ST_UD : -1); 1339 default: return -1; 1340 } 1341 } 1342 1343 static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr, 1344 int attr_mask) 1345 { 1346 u8 dest_rd_atomic; 1347 u32 access_flags; 1348 u32 hw_access_flags = 0; 1349 1350 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1351 dest_rd_atomic = attr->max_dest_rd_atomic; 1352 else 1353 dest_rd_atomic = qp->resp_depth; 1354 1355 if (attr_mask & IB_QP_ACCESS_FLAGS) 1356 access_flags = attr->qp_access_flags; 1357 else 1358 access_flags = qp->atomic_rd_en; 1359 1360 if (!dest_rd_atomic) 1361 access_flags &= IB_ACCESS_REMOTE_WRITE; 1362 1363 if (access_flags & IB_ACCESS_REMOTE_READ) 1364 hw_access_flags |= MLX4_QP_BIT_RRE; 1365 if (access_flags & IB_ACCESS_REMOTE_ATOMIC) 1366 hw_access_flags |= MLX4_QP_BIT_RAE; 1367 if (access_flags & IB_ACCESS_REMOTE_WRITE) 1368 hw_access_flags |= MLX4_QP_BIT_RWE; 1369 1370 return cpu_to_be32(hw_access_flags); 1371 } 1372 1373 static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr, 1374 int attr_mask) 1375 { 1376 if (attr_mask & IB_QP_PKEY_INDEX) 1377 sqp->pkey_index = attr->pkey_index; 1378 if (attr_mask & IB_QP_QKEY) 1379 sqp->qkey = attr->qkey; 1380 if (attr_mask & IB_QP_SQ_PSN) 1381 sqp->send_psn = attr->sq_psn; 1382 } 1383 1384 static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port) 1385 { 1386 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6); 1387 } 1388 1389 static int _mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah, 1390 u64 smac, u16 vlan_tag, struct mlx4_qp_path *path, 1391 struct mlx4_roce_smac_vlan_info *smac_info, u8 port) 1392 { 1393 int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) == 1394 IB_LINK_LAYER_ETHERNET; 1395 int vidx; 1396 int smac_index; 1397 int err; 1398 1399 1400 path->grh_mylmc = ah->src_path_bits & 0x7f; 1401 path->rlid = cpu_to_be16(ah->dlid); 1402 if (ah->static_rate) { 1403 path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET; 1404 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && 1405 !(1 << path->static_rate & dev->dev->caps.stat_rate_support)) 1406 --path->static_rate; 1407 } else 1408 path->static_rate = 0; 1409 1410 if (ah->ah_flags & IB_AH_GRH) { 1411 int real_sgid_index = mlx4_ib_gid_index_to_real_index(dev, 1412 port, 1413 ah->grh.sgid_index); 1414 1415 if (real_sgid_index >= dev->dev->caps.gid_table_len[port]) { 1416 pr_err("sgid_index (%u) too large. max is %d\n", 1417 real_sgid_index, dev->dev->caps.gid_table_len[port] - 1); 1418 return -1; 1419 } 1420 1421 path->grh_mylmc |= 1 << 7; 1422 path->mgid_index = real_sgid_index; 1423 path->hop_limit = ah->grh.hop_limit; 1424 path->tclass_flowlabel = 1425 cpu_to_be32((ah->grh.traffic_class << 20) | 1426 (ah->grh.flow_label)); 1427 memcpy(path->rgid, ah->grh.dgid.raw, 16); 1428 } 1429 1430 if (is_eth) { 1431 if (!(ah->ah_flags & IB_AH_GRH)) 1432 return -1; 1433 1434 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | 1435 ((port - 1) << 6) | ((ah->sl & 7) << 3); 1436 1437 path->feup |= MLX4_FEUP_FORCE_ETH_UP; 1438 if (vlan_tag < 0x1000) { 1439 if (smac_info->vid < 0x1000) { 1440 /* both valid vlan ids */ 1441 if (smac_info->vid != vlan_tag) { 1442 /* different VIDs. unreg old and reg new */ 1443 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx); 1444 if (err) 1445 return err; 1446 smac_info->candidate_vid = vlan_tag; 1447 smac_info->candidate_vlan_index = vidx; 1448 smac_info->candidate_vlan_port = port; 1449 smac_info->update_vid = 1; 1450 path->vlan_index = vidx; 1451 } else { 1452 path->vlan_index = smac_info->vlan_index; 1453 } 1454 } else { 1455 /* no current vlan tag in qp */ 1456 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx); 1457 if (err) 1458 return err; 1459 smac_info->candidate_vid = vlan_tag; 1460 smac_info->candidate_vlan_index = vidx; 1461 smac_info->candidate_vlan_port = port; 1462 smac_info->update_vid = 1; 1463 path->vlan_index = vidx; 1464 } 1465 path->feup |= MLX4_FVL_FORCE_ETH_VLAN; 1466 path->fl = 1 << 6; 1467 } else { 1468 /* have current vlan tag. unregister it at modify-qp success */ 1469 if (smac_info->vid < 0x1000) { 1470 smac_info->candidate_vid = 0xFFFF; 1471 smac_info->update_vid = 1; 1472 } 1473 } 1474 1475 /* get smac_index for RoCE use. 1476 * If no smac was yet assigned, register one. 1477 * If one was already assigned, but the new mac differs, 1478 * unregister the old one and register the new one. 1479 */ 1480 if ((!smac_info->smac && !smac_info->smac_port) || 1481 smac_info->smac != smac) { 1482 /* register candidate now, unreg if needed, after success */ 1483 smac_index = mlx4_register_mac(dev->dev, port, smac); 1484 if (smac_index >= 0) { 1485 smac_info->candidate_smac_index = smac_index; 1486 smac_info->candidate_smac = smac; 1487 smac_info->candidate_smac_port = port; 1488 } else { 1489 return -EINVAL; 1490 } 1491 } else { 1492 smac_index = smac_info->smac_index; 1493 } 1494 1495 memcpy(path->dmac, ah->dmac, 6); 1496 path->ackto = MLX4_IB_LINK_TYPE_ETH; 1497 /* put MAC table smac index for IBoE */ 1498 path->grh_mylmc = (u8) (smac_index) | 0x80; 1499 } else { 1500 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | 1501 ((port - 1) << 6) | ((ah->sl & 0xf) << 2); 1502 } 1503 1504 return 0; 1505 } 1506 1507 static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_qp_attr *qp, 1508 enum ib_qp_attr_mask qp_attr_mask, 1509 struct mlx4_ib_qp *mqp, 1510 struct mlx4_qp_path *path, u8 port, 1511 u16 vlan_id, u8 *smac) 1512 { 1513 return _mlx4_set_path(dev, &qp->ah_attr, 1514 mlx4_mac_to_u64(smac), 1515 vlan_id, 1516 path, &mqp->pri, port); 1517 } 1518 1519 static int mlx4_set_alt_path(struct mlx4_ib_dev *dev, 1520 const struct ib_qp_attr *qp, 1521 enum ib_qp_attr_mask qp_attr_mask, 1522 struct mlx4_ib_qp *mqp, 1523 struct mlx4_qp_path *path, u8 port) 1524 { 1525 return _mlx4_set_path(dev, &qp->alt_ah_attr, 1526 0, 1527 0xffff, 1528 path, &mqp->alt, port); 1529 } 1530 1531 static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 1532 { 1533 struct mlx4_ib_gid_entry *ge, *tmp; 1534 1535 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) { 1536 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) { 1537 ge->added = 1; 1538 ge->port = qp->port; 1539 } 1540 } 1541 } 1542 1543 static int handle_eth_ud_smac_index(struct mlx4_ib_dev *dev, 1544 struct mlx4_ib_qp *qp, 1545 struct mlx4_qp_context *context) 1546 { 1547 u64 u64_mac; 1548 int smac_index; 1549 1550 u64_mac = atomic64_read(&dev->iboe.mac[qp->port - 1]); 1551 1552 context->pri_path.sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | ((qp->port - 1) << 6); 1553 if (!qp->pri.smac && !qp->pri.smac_port) { 1554 smac_index = mlx4_register_mac(dev->dev, qp->port, u64_mac); 1555 if (smac_index >= 0) { 1556 qp->pri.candidate_smac_index = smac_index; 1557 qp->pri.candidate_smac = u64_mac; 1558 qp->pri.candidate_smac_port = qp->port; 1559 context->pri_path.grh_mylmc = 0x80 | (u8) smac_index; 1560 } else { 1561 return -ENOENT; 1562 } 1563 } 1564 return 0; 1565 } 1566 1567 static int create_qp_lb_counter(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 1568 { 1569 struct counter_index *new_counter_index; 1570 int err; 1571 u32 tmp_idx; 1572 1573 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) != 1574 IB_LINK_LAYER_ETHERNET || 1575 !(qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) || 1576 !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_LB_SRC_CHK)) 1577 return 0; 1578 1579 err = mlx4_counter_alloc(dev->dev, &tmp_idx); 1580 if (err) 1581 return err; 1582 1583 new_counter_index = kmalloc(sizeof(*new_counter_index), GFP_KERNEL); 1584 if (!new_counter_index) { 1585 mlx4_counter_free(dev->dev, tmp_idx); 1586 return -ENOMEM; 1587 } 1588 1589 new_counter_index->index = tmp_idx; 1590 new_counter_index->allocated = 1; 1591 qp->counter_index = new_counter_index; 1592 1593 mutex_lock(&dev->counters_table[qp->port - 1].mutex); 1594 list_add_tail(&new_counter_index->list, 1595 &dev->counters_table[qp->port - 1].counters_list); 1596 mutex_unlock(&dev->counters_table[qp->port - 1].mutex); 1597 1598 return 0; 1599 } 1600 1601 enum { 1602 MLX4_QPC_ROCE_MODE_1 = 0, 1603 MLX4_QPC_ROCE_MODE_2 = 2, 1604 MLX4_QPC_ROCE_MODE_UNDEFINED = 0xff 1605 }; 1606 1607 static u8 gid_type_to_qpc(enum ib_gid_type gid_type) 1608 { 1609 switch (gid_type) { 1610 case IB_GID_TYPE_ROCE: 1611 return MLX4_QPC_ROCE_MODE_1; 1612 case IB_GID_TYPE_ROCE_UDP_ENCAP: 1613 return MLX4_QPC_ROCE_MODE_2; 1614 default: 1615 return MLX4_QPC_ROCE_MODE_UNDEFINED; 1616 } 1617 } 1618 1619 static int __mlx4_ib_modify_qp(struct ib_qp *ibqp, 1620 const struct ib_qp_attr *attr, int attr_mask, 1621 enum ib_qp_state cur_state, enum ib_qp_state new_state) 1622 { 1623 struct mlx4_ib_dev *dev = to_mdev(ibqp->device); 1624 struct mlx4_ib_qp *qp = to_mqp(ibqp); 1625 struct mlx4_ib_pd *pd; 1626 struct mlx4_ib_cq *send_cq, *recv_cq; 1627 struct mlx4_qp_context *context; 1628 enum mlx4_qp_optpar optpar = 0; 1629 int sqd_event; 1630 int steer_qp = 0; 1631 int err = -EINVAL; 1632 int counter_index; 1633 1634 /* APM is not supported under RoCE */ 1635 if (attr_mask & IB_QP_ALT_PATH && 1636 rdma_port_get_link_layer(&dev->ib_dev, qp->port) == 1637 IB_LINK_LAYER_ETHERNET) 1638 return -ENOTSUPP; 1639 1640 context = kzalloc(sizeof *context, GFP_KERNEL); 1641 if (!context) 1642 return -ENOMEM; 1643 1644 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) | 1645 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16)); 1646 1647 if (!(attr_mask & IB_QP_PATH_MIG_STATE)) 1648 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); 1649 else { 1650 optpar |= MLX4_QP_OPTPAR_PM_STATE; 1651 switch (attr->path_mig_state) { 1652 case IB_MIG_MIGRATED: 1653 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); 1654 break; 1655 case IB_MIG_REARM: 1656 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11); 1657 break; 1658 case IB_MIG_ARMED: 1659 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11); 1660 break; 1661 } 1662 } 1663 1664 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) 1665 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11; 1666 else if (ibqp->qp_type == IB_QPT_RAW_PACKET) 1667 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX; 1668 else if (ibqp->qp_type == IB_QPT_UD) { 1669 if (qp->flags & MLX4_IB_QP_LSO) 1670 context->mtu_msgmax = (IB_MTU_4096 << 5) | 1671 ilog2(dev->dev->caps.max_gso_sz); 1672 else 1673 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12; 1674 } else if (attr_mask & IB_QP_PATH_MTU) { 1675 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) { 1676 pr_err("path MTU (%u) is invalid\n", 1677 attr->path_mtu); 1678 goto out; 1679 } 1680 context->mtu_msgmax = (attr->path_mtu << 5) | 1681 ilog2(dev->dev->caps.max_msg_sz); 1682 } 1683 1684 if (qp->rq.wqe_cnt) 1685 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3; 1686 context->rq_size_stride |= qp->rq.wqe_shift - 4; 1687 1688 if (qp->sq.wqe_cnt) 1689 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3; 1690 context->sq_size_stride |= qp->sq.wqe_shift - 4; 1691 1692 if (new_state == IB_QPS_RESET && qp->counter_index) 1693 mlx4_ib_free_qp_counter(dev, qp); 1694 1695 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) { 1696 context->sq_size_stride |= !!qp->sq_no_prefetch << 7; 1697 context->xrcd = cpu_to_be32((u32) qp->xrcdn); 1698 if (ibqp->qp_type == IB_QPT_RAW_PACKET) 1699 context->param3 |= cpu_to_be32(1 << 30); 1700 } 1701 1702 if (qp->ibqp.uobject) 1703 context->usr_page = cpu_to_be32( 1704 mlx4_to_hw_uar_index(dev->dev, 1705 to_mucontext(ibqp->uobject->context)->uar.index)); 1706 else 1707 context->usr_page = cpu_to_be32( 1708 mlx4_to_hw_uar_index(dev->dev, dev->priv_uar.index)); 1709 1710 if (attr_mask & IB_QP_DEST_QPN) 1711 context->remote_qpn = cpu_to_be32(attr->dest_qp_num); 1712 1713 if (attr_mask & IB_QP_PORT) { 1714 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD && 1715 !(attr_mask & IB_QP_AV)) { 1716 mlx4_set_sched(&context->pri_path, attr->port_num); 1717 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE; 1718 } 1719 } 1720 1721 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) { 1722 err = create_qp_lb_counter(dev, qp); 1723 if (err) 1724 goto out; 1725 1726 counter_index = 1727 dev->counters_table[qp->port - 1].default_counter; 1728 if (qp->counter_index) 1729 counter_index = qp->counter_index->index; 1730 1731 if (counter_index != -1) { 1732 context->pri_path.counter_index = counter_index; 1733 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX; 1734 if (qp->counter_index) { 1735 context->pri_path.fl |= 1736 MLX4_FL_ETH_SRC_CHECK_MC_LB; 1737 context->pri_path.vlan_control |= 1738 MLX4_CTRL_ETH_SRC_CHECK_IF_COUNTER; 1739 } 1740 } else 1741 context->pri_path.counter_index = 1742 MLX4_SINK_COUNTER_INDEX(dev->dev); 1743 1744 if (qp->flags & MLX4_IB_QP_NETIF) { 1745 mlx4_ib_steer_qp_reg(dev, qp, 1); 1746 steer_qp = 1; 1747 } 1748 1749 if (ibqp->qp_type == IB_QPT_GSI) { 1750 enum ib_gid_type gid_type = qp->flags & MLX4_IB_ROCE_V2_GSI_QP ? 1751 IB_GID_TYPE_ROCE_UDP_ENCAP : IB_GID_TYPE_ROCE; 1752 u8 qpc_roce_mode = gid_type_to_qpc(gid_type); 1753 1754 context->rlkey_roce_mode |= (qpc_roce_mode << 6); 1755 } 1756 } 1757 1758 if (attr_mask & IB_QP_PKEY_INDEX) { 1759 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) 1760 context->pri_path.disable_pkey_check = 0x40; 1761 context->pri_path.pkey_index = attr->pkey_index; 1762 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX; 1763 } 1764 1765 if (attr_mask & IB_QP_AV) { 1766 u8 port_num = mlx4_is_bonded(to_mdev(ibqp->device)->dev) ? 1 : 1767 attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 1768 union ib_gid gid; 1769 struct ib_gid_attr gid_attr; 1770 u16 vlan = 0xffff; 1771 u8 smac[ETH_ALEN]; 1772 int status = 0; 1773 int is_eth = rdma_cap_eth_ah(&dev->ib_dev, port_num) && 1774 attr->ah_attr.ah_flags & IB_AH_GRH; 1775 1776 if (is_eth) { 1777 int index = attr->ah_attr.grh.sgid_index; 1778 1779 status = ib_get_cached_gid(ibqp->device, port_num, 1780 index, &gid, &gid_attr); 1781 if (!status && !memcmp(&gid, &zgid, sizeof(gid))) 1782 status = -ENOENT; 1783 if (!status && gid_attr.ndev) { 1784 vlan = rdma_vlan_dev_vlan_id(gid_attr.ndev); 1785 memcpy(smac, IF_LLADDR(gid_attr.ndev), ETH_ALEN); 1786 if_rele(gid_attr.ndev); 1787 } 1788 } 1789 if (status) 1790 goto out; 1791 1792 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path, 1793 port_num, vlan, smac)) 1794 goto out; 1795 1796 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH | 1797 MLX4_QP_OPTPAR_SCHED_QUEUE); 1798 1799 if (is_eth && 1800 (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR)) { 1801 u8 qpc_roce_mode = gid_type_to_qpc(gid_attr.gid_type); 1802 1803 if (qpc_roce_mode == MLX4_QPC_ROCE_MODE_UNDEFINED) { 1804 err = -EINVAL; 1805 goto out; 1806 } 1807 context->rlkey_roce_mode |= (qpc_roce_mode << 6); 1808 } 1809 1810 } 1811 1812 if (attr_mask & IB_QP_TIMEOUT) { 1813 context->pri_path.ackto |= attr->timeout << 3; 1814 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT; 1815 } 1816 1817 if (attr_mask & IB_QP_ALT_PATH) { 1818 if (attr->alt_port_num == 0 || 1819 attr->alt_port_num > dev->dev->caps.num_ports) 1820 goto out; 1821 1822 if (attr->alt_pkey_index >= 1823 dev->dev->caps.pkey_table_len[attr->alt_port_num]) 1824 goto out; 1825 1826 if (mlx4_set_alt_path(dev, attr, attr_mask, qp, 1827 &context->alt_path, 1828 attr->alt_port_num)) 1829 goto out; 1830 1831 context->alt_path.pkey_index = attr->alt_pkey_index; 1832 context->alt_path.ackto = attr->alt_timeout << 3; 1833 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH; 1834 } 1835 1836 pd = get_pd(qp); 1837 get_cqs(qp, &send_cq, &recv_cq); 1838 context->pd = cpu_to_be32(pd->pdn); 1839 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn); 1840 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn); 1841 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28); 1842 1843 /* Set "fast registration enabled" for all kernel QPs */ 1844 if (!qp->ibqp.uobject) 1845 context->params1 |= cpu_to_be32(1 << 11); 1846 1847 if (attr_mask & IB_QP_RNR_RETRY) { 1848 context->params1 |= cpu_to_be32(attr->rnr_retry << 13); 1849 optpar |= MLX4_QP_OPTPAR_RNR_RETRY; 1850 } 1851 1852 if (attr_mask & IB_QP_RETRY_CNT) { 1853 context->params1 |= cpu_to_be32(attr->retry_cnt << 16); 1854 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT; 1855 } 1856 1857 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) { 1858 if (attr->max_rd_atomic) 1859 context->params1 |= 1860 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21); 1861 optpar |= MLX4_QP_OPTPAR_SRA_MAX; 1862 } 1863 1864 if (attr_mask & IB_QP_SQ_PSN) 1865 context->next_send_psn = cpu_to_be32(attr->sq_psn); 1866 1867 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) { 1868 if (attr->max_dest_rd_atomic) 1869 context->params2 |= 1870 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21); 1871 optpar |= MLX4_QP_OPTPAR_RRA_MAX; 1872 } 1873 1874 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) { 1875 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask); 1876 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE; 1877 } 1878 1879 if (ibqp->srq) 1880 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC); 1881 1882 if (attr_mask & IB_QP_MIN_RNR_TIMER) { 1883 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24); 1884 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT; 1885 } 1886 if (attr_mask & IB_QP_RQ_PSN) 1887 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn); 1888 1889 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */ 1890 if (attr_mask & IB_QP_QKEY) { 1891 if (qp->mlx4_ib_qp_type & 1892 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) 1893 context->qkey = cpu_to_be32(IB_QP_SET_QKEY); 1894 else { 1895 if (mlx4_is_mfunc(dev->dev) && 1896 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) && 1897 (attr->qkey & MLX4_RESERVED_QKEY_MASK) == 1898 MLX4_RESERVED_QKEY_BASE) { 1899 pr_err("Cannot use reserved QKEY" 1900 " 0x%x (range 0xffff0000..0xffffffff" 1901 " is reserved)\n", attr->qkey); 1902 err = -EINVAL; 1903 goto out; 1904 } 1905 context->qkey = cpu_to_be32(attr->qkey); 1906 } 1907 optpar |= MLX4_QP_OPTPAR_Q_KEY; 1908 } 1909 1910 if (ibqp->srq) 1911 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn); 1912 1913 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) 1914 context->db_rec_addr = cpu_to_be64(qp->db.dma); 1915 1916 if (cur_state == IB_QPS_INIT && 1917 new_state == IB_QPS_RTR && 1918 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI || 1919 ibqp->qp_type == IB_QPT_UD || 1920 ibqp->qp_type == IB_QPT_RAW_PACKET)) { 1921 context->pri_path.sched_queue = (qp->port - 1) << 6; 1922 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI || 1923 qp->mlx4_ib_qp_type & 1924 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) { 1925 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE; 1926 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI) 1927 context->pri_path.fl = 0x80; 1928 } else { 1929 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) 1930 context->pri_path.fl = 0x80; 1931 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE; 1932 } 1933 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) == 1934 IB_LINK_LAYER_ETHERNET) { 1935 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI || 1936 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) 1937 context->pri_path.feup = 1 << 7; /* don't fsm */ 1938 /* handle smac_index */ 1939 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD || 1940 qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI || 1941 qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) { 1942 err = handle_eth_ud_smac_index(dev, qp, context); 1943 if (err) { 1944 err = -EINVAL; 1945 goto out; 1946 } 1947 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI) 1948 dev->qp1_proxy[qp->port - 1] = qp; 1949 } 1950 } 1951 } 1952 1953 if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET) { 1954 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) | 1955 MLX4_IB_LINK_TYPE_ETH; 1956 if (dev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) { 1957 /* set QP to receive both tunneled & non-tunneled packets */ 1958 if (!(context->flags & cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET))) 1959 context->srqn = cpu_to_be32(7 << 28); 1960 } 1961 } 1962 1963 if (ibqp->qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) { 1964 int is_eth = rdma_port_get_link_layer( 1965 &dev->ib_dev, qp->port) == 1966 IB_LINK_LAYER_ETHERNET; 1967 if (is_eth) { 1968 context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH; 1969 optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH; 1970 } 1971 } 1972 1973 1974 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD && 1975 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify) 1976 sqd_event = 1; 1977 else 1978 sqd_event = 0; 1979 1980 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) 1981 context->rlkey_roce_mode |= (1 << 4); 1982 1983 /* 1984 * Before passing a kernel QP to the HW, make sure that the 1985 * ownership bits of the send queue are set and the SQ 1986 * headroom is stamped so that the hardware doesn't start 1987 * processing stale work requests. 1988 */ 1989 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) { 1990 struct mlx4_wqe_ctrl_seg *ctrl; 1991 int i; 1992 1993 for (i = 0; i < qp->sq.wqe_cnt; ++i) { 1994 ctrl = get_send_wqe(qp, i); 1995 ctrl->owner_opcode = cpu_to_be32(1U << 31); 1996 if (qp->sq_max_wqes_per_wr == 1) 1997 ctrl->fence_size = 1998 1 << (qp->sq.wqe_shift - 4); 1999 2000 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift); 2001 } 2002 } 2003 2004 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state), 2005 to_mlx4_state(new_state), context, optpar, 2006 sqd_event, &qp->mqp); 2007 if (err) 2008 goto out; 2009 2010 qp->state = new_state; 2011 2012 if (attr_mask & IB_QP_ACCESS_FLAGS) 2013 qp->atomic_rd_en = attr->qp_access_flags; 2014 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 2015 qp->resp_depth = attr->max_dest_rd_atomic; 2016 if (attr_mask & IB_QP_PORT) { 2017 qp->port = attr->port_num; 2018 update_mcg_macs(dev, qp); 2019 } 2020 if (attr_mask & IB_QP_ALT_PATH) 2021 qp->alt_port = attr->alt_port_num; 2022 2023 if (is_sqp(dev, qp)) 2024 store_sqp_attrs(to_msqp(qp), attr, attr_mask); 2025 2026 /* 2027 * If we moved QP0 to RTR, bring the IB link up; if we moved 2028 * QP0 to RESET or ERROR, bring the link back down. 2029 */ 2030 if (is_qp0(dev, qp)) { 2031 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR) 2032 if (mlx4_INIT_PORT(dev->dev, qp->port)) 2033 pr_warn("INIT_PORT failed for port %d\n", 2034 qp->port); 2035 2036 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR && 2037 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR)) 2038 mlx4_CLOSE_PORT(dev->dev, qp->port); 2039 } 2040 2041 /* 2042 * If we moved a kernel QP to RESET, clean up all old CQ 2043 * entries and reinitialize the QP. 2044 */ 2045 if (new_state == IB_QPS_RESET) { 2046 if (!ibqp->uobject) { 2047 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn, 2048 ibqp->srq ? to_msrq(ibqp->srq) : NULL); 2049 if (send_cq != recv_cq) 2050 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); 2051 2052 qp->rq.head = 0; 2053 qp->rq.tail = 0; 2054 qp->sq.head = 0; 2055 qp->sq.tail = 0; 2056 qp->sq_next_wqe = 0; 2057 if (qp->rq.wqe_cnt) 2058 *qp->db.db = 0; 2059 2060 if (qp->flags & MLX4_IB_QP_NETIF) 2061 mlx4_ib_steer_qp_reg(dev, qp, 0); 2062 } 2063 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) { 2064 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 2065 qp->pri.smac = 0; 2066 qp->pri.smac_port = 0; 2067 } 2068 if (qp->alt.smac) { 2069 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 2070 qp->alt.smac = 0; 2071 } 2072 if (qp->pri.vid < 0x1000) { 2073 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid); 2074 qp->pri.vid = 0xFFFF; 2075 qp->pri.candidate_vid = 0xFFFF; 2076 qp->pri.update_vid = 0; 2077 } 2078 2079 if (qp->alt.vid < 0x1000) { 2080 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid); 2081 qp->alt.vid = 0xFFFF; 2082 qp->alt.candidate_vid = 0xFFFF; 2083 qp->alt.update_vid = 0; 2084 } 2085 } 2086 out: 2087 if (err && qp->counter_index) 2088 mlx4_ib_free_qp_counter(dev, qp); 2089 if (err && steer_qp) 2090 mlx4_ib_steer_qp_reg(dev, qp, 0); 2091 kfree(context); 2092 if (qp->pri.candidate_smac || 2093 (!qp->pri.candidate_smac && qp->pri.candidate_smac_port)) { 2094 if (err) { 2095 mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac); 2096 } else { 2097 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) 2098 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 2099 qp->pri.smac = qp->pri.candidate_smac; 2100 qp->pri.smac_index = qp->pri.candidate_smac_index; 2101 qp->pri.smac_port = qp->pri.candidate_smac_port; 2102 } 2103 qp->pri.candidate_smac = 0; 2104 qp->pri.candidate_smac_index = 0; 2105 qp->pri.candidate_smac_port = 0; 2106 } 2107 if (qp->alt.candidate_smac) { 2108 if (err) { 2109 mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac); 2110 } else { 2111 if (qp->alt.smac) 2112 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 2113 qp->alt.smac = qp->alt.candidate_smac; 2114 qp->alt.smac_index = qp->alt.candidate_smac_index; 2115 qp->alt.smac_port = qp->alt.candidate_smac_port; 2116 } 2117 qp->alt.candidate_smac = 0; 2118 qp->alt.candidate_smac_index = 0; 2119 qp->alt.candidate_smac_port = 0; 2120 } 2121 2122 if (qp->pri.update_vid) { 2123 if (err) { 2124 if (qp->pri.candidate_vid < 0x1000) 2125 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port, 2126 qp->pri.candidate_vid); 2127 } else { 2128 if (qp->pri.vid < 0x1000) 2129 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, 2130 qp->pri.vid); 2131 qp->pri.vid = qp->pri.candidate_vid; 2132 qp->pri.vlan_port = qp->pri.candidate_vlan_port; 2133 qp->pri.vlan_index = qp->pri.candidate_vlan_index; 2134 } 2135 qp->pri.candidate_vid = 0xFFFF; 2136 qp->pri.update_vid = 0; 2137 } 2138 2139 if (qp->alt.update_vid) { 2140 if (err) { 2141 if (qp->alt.candidate_vid < 0x1000) 2142 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port, 2143 qp->alt.candidate_vid); 2144 } else { 2145 if (qp->alt.vid < 0x1000) 2146 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, 2147 qp->alt.vid); 2148 qp->alt.vid = qp->alt.candidate_vid; 2149 qp->alt.vlan_port = qp->alt.candidate_vlan_port; 2150 qp->alt.vlan_index = qp->alt.candidate_vlan_index; 2151 } 2152 qp->alt.candidate_vid = 0xFFFF; 2153 qp->alt.update_vid = 0; 2154 } 2155 2156 return err; 2157 } 2158 2159 static int _mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 2160 int attr_mask, struct ib_udata *udata) 2161 { 2162 struct mlx4_ib_dev *dev = to_mdev(ibqp->device); 2163 struct mlx4_ib_qp *qp = to_mqp(ibqp); 2164 enum ib_qp_state cur_state, new_state; 2165 int err = -EINVAL; 2166 int ll; 2167 mutex_lock(&qp->mutex); 2168 2169 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state; 2170 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; 2171 2172 if (cur_state == new_state && cur_state == IB_QPS_RESET) { 2173 ll = IB_LINK_LAYER_UNSPECIFIED; 2174 } else { 2175 int port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 2176 ll = rdma_port_get_link_layer(&dev->ib_dev, port); 2177 } 2178 2179 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, 2180 attr_mask, ll)) { 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); 2254 2255 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) 2256 attr->port_num = 1; 2257 2258 out: 2259 mutex_unlock(&qp->mutex); 2260 return err; 2261 } 2262 2263 int 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 2284 static 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 2297 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp, 2298 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 2410 static 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 2427 static int build_mlx_header(struct mlx4_ib_sqp *sqp, 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 2688 static 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 2705 static __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 2717 static void set_reg_seg(struct mlx4_wqe_fmr_seg *fseg, 2718 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 2733 static 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 2739 static __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 2747 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, 2748 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 2763 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg, 2764 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 2772 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg, 2773 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 2782 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev, 2783 struct mlx4_wqe_datagram_seg *dseg, 2784 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 2806 static void build_tunnel_header(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 2844 static 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 2864 static 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 2882 static 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 2889 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, 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 2909 static __be32 send_ieth(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 2924 static 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 2931 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, 2932 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 3236 out: 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 3266 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, 3267 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 3335 out: 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 3353 static 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 3368 static 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 3378 static 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 3392 static 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 3428 int 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 3491 done: 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 3526 out: 3527 mutex_unlock(&qp->mutex); 3528 return err; 3529 } 3530 3531