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 38 #include <rdma/ib_cache.h> 39 #include <rdma/ib_pack.h> 40 #include <rdma/ib_addr.h> 41 #include <rdma/ib_mad.h> 42 43 #include <linux/mlx4/driver.h> 44 #include <linux/mlx4/qp.h> 45 46 #include "mlx4_ib.h" 47 #include "user.h" 48 49 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, 50 struct mlx4_ib_cq *recv_cq); 51 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, 52 struct mlx4_ib_cq *recv_cq); 53 54 enum { 55 MLX4_IB_ACK_REQ_FREQ = 8, 56 }; 57 58 enum { 59 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83, 60 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f, 61 MLX4_IB_LINK_TYPE_IB = 0, 62 MLX4_IB_LINK_TYPE_ETH = 1 63 }; 64 65 enum { 66 /* 67 * Largest possible UD header: send with GRH and immediate 68 * data plus 18 bytes for an Ethernet header with VLAN/802.1Q 69 * tag. (LRH would only use 8 bytes, so Ethernet is the 70 * biggest case) 71 */ 72 MLX4_IB_UD_HEADER_SIZE = 82, 73 MLX4_IB_LSO_HEADER_SPARE = 128, 74 }; 75 76 enum { 77 MLX4_IB_IBOE_ETHERTYPE = 0x8915 78 }; 79 80 struct mlx4_ib_sqp { 81 struct mlx4_ib_qp qp; 82 int pkey_index; 83 u32 qkey; 84 u32 send_psn; 85 struct ib_ud_header ud_header; 86 u8 header_buf[MLX4_IB_UD_HEADER_SIZE]; 87 }; 88 89 enum { 90 MLX4_IB_MIN_SQ_STRIDE = 6, 91 MLX4_IB_CACHE_LINE_SIZE = 64, 92 }; 93 94 enum { 95 MLX4_RAW_QP_MTU = 7, 96 MLX4_RAW_QP_MSGMAX = 31, 97 }; 98 99 #ifndef ETH_ALEN 100 #define ETH_ALEN 6 101 #endif 102 103 static const __be32 mlx4_ib_opcode[] = { 104 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND), 105 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO), 106 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM), 107 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE), 108 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM), 109 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ), 110 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS), 111 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA), 112 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL), 113 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL), 114 [IB_WR_FAST_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR), 115 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS), 116 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA), 117 [IB_WR_BIND_MW] = cpu_to_be32(MLX4_OPCODE_BIND_MW), 118 }; 119 120 static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp) 121 { 122 return container_of(mqp, struct mlx4_ib_sqp, qp); 123 } 124 125 static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 126 { 127 if (!mlx4_is_master(dev->dev)) 128 return 0; 129 130 return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn && 131 qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn + 132 8 * MLX4_MFUNC_MAX; 133 } 134 135 static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 136 { 137 int proxy_sqp = 0; 138 int real_sqp = 0; 139 int i; 140 /* PPF or Native -- real SQP */ 141 real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) && 142 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn && 143 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3); 144 if (real_sqp) 145 return 1; 146 /* VF or PF -- proxy SQP */ 147 if (mlx4_is_mfunc(dev->dev)) { 148 for (i = 0; i < dev->dev->caps.num_ports; i++) { 149 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i] || 150 qp->mqp.qpn == dev->dev->caps.qp1_proxy[i]) { 151 proxy_sqp = 1; 152 break; 153 } 154 } 155 } 156 return proxy_sqp; 157 } 158 159 /* used for INIT/CLOSE port logic */ 160 static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 161 { 162 int proxy_qp0 = 0; 163 int real_qp0 = 0; 164 int i; 165 /* PPF or Native -- real QP0 */ 166 real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) && 167 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn && 168 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1); 169 if (real_qp0) 170 return 1; 171 /* VF or PF -- proxy QP0 */ 172 if (mlx4_is_mfunc(dev->dev)) { 173 for (i = 0; i < dev->dev->caps.num_ports; i++) { 174 if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i]) { 175 proxy_qp0 = 1; 176 break; 177 } 178 } 179 } 180 return proxy_qp0; 181 } 182 183 static void *get_wqe(struct mlx4_ib_qp *qp, int offset) 184 { 185 return mlx4_buf_offset(&qp->buf, offset); 186 } 187 188 static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n) 189 { 190 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift)); 191 } 192 193 static void *get_send_wqe(struct mlx4_ib_qp *qp, int n) 194 { 195 return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift)); 196 } 197 198 /* 199 * Stamp a SQ WQE so that it is invalid if prefetched by marking the 200 * first four bytes of every 64 byte chunk with 201 * 0x7FFFFFF | (invalid_ownership_value << 31). 202 * 203 * When the max work request size is less than or equal to the WQE 204 * basic block size, as an optimization, we can stamp all WQEs with 205 * 0xffffffff, and skip the very first chunk of each WQE. 206 */ 207 static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size) 208 { 209 __be32 *wqe; 210 int i; 211 int s; 212 int ind; 213 void *buf; 214 __be32 stamp; 215 struct mlx4_wqe_ctrl_seg *ctrl; 216 217 if (qp->sq_max_wqes_per_wr > 1) { 218 s = roundup(size, 1U << qp->sq.wqe_shift); 219 for (i = 0; i < s; i += 64) { 220 ind = (i >> qp->sq.wqe_shift) + n; 221 stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) : 222 cpu_to_be32(0xffffffff); 223 buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1)); 224 wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1)); 225 *wqe = stamp; 226 } 227 } else { 228 ctrl = buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1)); 229 s = (ctrl->fence_size & 0x3f) << 4; 230 for (i = 64; i < s; i += 64) { 231 wqe = buf + i; 232 *wqe = cpu_to_be32(0xffffffff); 233 } 234 } 235 } 236 237 static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size) 238 { 239 struct mlx4_wqe_ctrl_seg *ctrl; 240 struct mlx4_wqe_inline_seg *inl; 241 void *wqe; 242 int s; 243 244 ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1)); 245 s = sizeof(struct mlx4_wqe_ctrl_seg); 246 247 if (qp->ibqp.qp_type == IB_QPT_UD) { 248 struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl; 249 struct mlx4_av *av = (struct mlx4_av *)dgram->av; 250 memset(dgram, 0, sizeof *dgram); 251 av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn); 252 s += sizeof(struct mlx4_wqe_datagram_seg); 253 } 254 255 /* Pad the remainder of the WQE with an inline data segment. */ 256 if (size > s) { 257 inl = wqe + s; 258 inl->byte_count = cpu_to_be32(1 << 31 | (size - s - sizeof *inl)); 259 } 260 ctrl->srcrb_flags = 0; 261 ctrl->fence_size = size / 16; 262 /* 263 * Make sure descriptor is fully written before setting ownership bit 264 * (because HW can start executing as soon as we do). 265 */ 266 wmb(); 267 268 ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) | 269 (n & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0); 270 271 stamp_send_wqe(qp, n + qp->sq_spare_wqes, size); 272 } 273 274 /* Post NOP WQE to prevent wrap-around in the middle of WR */ 275 static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind) 276 { 277 unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1)); 278 if (unlikely(s < qp->sq_max_wqes_per_wr)) { 279 post_nop_wqe(qp, ind, s << qp->sq.wqe_shift); 280 ind += s; 281 } 282 return ind; 283 } 284 285 static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type) 286 { 287 struct ib_event event; 288 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp; 289 290 if (type == MLX4_EVENT_TYPE_PATH_MIG) 291 to_mibqp(qp)->port = to_mibqp(qp)->alt_port; 292 293 if (ibqp->event_handler) { 294 event.device = ibqp->device; 295 event.element.qp = ibqp; 296 switch (type) { 297 case MLX4_EVENT_TYPE_PATH_MIG: 298 event.event = IB_EVENT_PATH_MIG; 299 break; 300 case MLX4_EVENT_TYPE_COMM_EST: 301 event.event = IB_EVENT_COMM_EST; 302 break; 303 case MLX4_EVENT_TYPE_SQ_DRAINED: 304 event.event = IB_EVENT_SQ_DRAINED; 305 break; 306 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE: 307 event.event = IB_EVENT_QP_LAST_WQE_REACHED; 308 break; 309 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR: 310 event.event = IB_EVENT_QP_FATAL; 311 break; 312 case MLX4_EVENT_TYPE_PATH_MIG_FAILED: 313 event.event = IB_EVENT_PATH_MIG_ERR; 314 break; 315 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR: 316 event.event = IB_EVENT_QP_REQ_ERR; 317 break; 318 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR: 319 event.event = IB_EVENT_QP_ACCESS_ERR; 320 break; 321 default: 322 pr_warn("Unexpected event type %d " 323 "on QP %06x\n", type, qp->qpn); 324 return; 325 } 326 327 ibqp->event_handler(&event, ibqp->qp_context); 328 } 329 } 330 331 static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags) 332 { 333 /* 334 * UD WQEs must have a datagram segment. 335 * RC and UC WQEs might have a remote address segment. 336 * MLX WQEs need two extra inline data segments (for the UD 337 * header and space for the ICRC). 338 */ 339 switch (type) { 340 case MLX4_IB_QPT_UD: 341 return sizeof (struct mlx4_wqe_ctrl_seg) + 342 sizeof (struct mlx4_wqe_datagram_seg) + 343 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0); 344 case MLX4_IB_QPT_PROXY_SMI_OWNER: 345 case MLX4_IB_QPT_PROXY_SMI: 346 case MLX4_IB_QPT_PROXY_GSI: 347 return sizeof (struct mlx4_wqe_ctrl_seg) + 348 sizeof (struct mlx4_wqe_datagram_seg) + 64; 349 case MLX4_IB_QPT_TUN_SMI_OWNER: 350 case MLX4_IB_QPT_TUN_GSI: 351 return sizeof (struct mlx4_wqe_ctrl_seg) + 352 sizeof (struct mlx4_wqe_datagram_seg); 353 354 case MLX4_IB_QPT_UC: 355 return sizeof (struct mlx4_wqe_ctrl_seg) + 356 sizeof (struct mlx4_wqe_raddr_seg); 357 case MLX4_IB_QPT_RC: 358 return sizeof (struct mlx4_wqe_ctrl_seg) + 359 sizeof (struct mlx4_wqe_atomic_seg) + 360 sizeof (struct mlx4_wqe_raddr_seg); 361 case MLX4_IB_QPT_SMI: 362 case MLX4_IB_QPT_GSI: 363 return sizeof (struct mlx4_wqe_ctrl_seg) + 364 ALIGN(MLX4_IB_UD_HEADER_SIZE + 365 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE, 366 MLX4_INLINE_ALIGN) * 367 sizeof (struct mlx4_wqe_inline_seg), 368 sizeof (struct mlx4_wqe_data_seg)) + 369 ALIGN(4 + 370 sizeof (struct mlx4_wqe_inline_seg), 371 sizeof (struct mlx4_wqe_data_seg)); 372 default: 373 return sizeof (struct mlx4_wqe_ctrl_seg); 374 } 375 } 376 377 static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, 378 int is_user, int has_rq, struct mlx4_ib_qp *qp) 379 { 380 /* Sanity check RQ size before proceeding */ 381 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE || 382 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg)) 383 return -EINVAL; 384 385 if (!has_rq) { 386 if (cap->max_recv_wr) 387 return -EINVAL; 388 389 qp->rq.wqe_cnt = qp->rq.max_gs = 0; 390 } else { 391 /* HW requires >= 1 RQ entry with >= 1 gather entry */ 392 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge)) 393 return -EINVAL; 394 395 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr)); 396 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge)); 397 qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg)); 398 } 399 400 /* leave userspace return values as they were, so as not to break ABI */ 401 if (is_user) { 402 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt; 403 cap->max_recv_sge = qp->rq.max_gs; 404 } else { 405 cap->max_recv_wr = qp->rq.max_post = 406 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt); 407 cap->max_recv_sge = min(qp->rq.max_gs, 408 min(dev->dev->caps.max_sq_sg, 409 dev->dev->caps.max_rq_sg)); 410 } 411 412 return 0; 413 } 414 415 static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap, 416 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp) 417 { 418 int s; 419 420 /* Sanity check SQ size before proceeding */ 421 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) || 422 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) || 423 cap->max_inline_data + send_wqe_overhead(type, qp->flags) + 424 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz) 425 return -EINVAL; 426 427 /* 428 * For MLX transport we need 2 extra S/G entries: 429 * one for the header and one for the checksum at the end 430 */ 431 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI || 432 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) && 433 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg) 434 return -EINVAL; 435 436 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg), 437 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) + 438 send_wqe_overhead(type, qp->flags); 439 440 if (s > dev->dev->caps.max_sq_desc_sz) 441 return -EINVAL; 442 443 /* 444 * Hermon supports shrinking WQEs, such that a single work 445 * request can include multiple units of 1 << wqe_shift. This 446 * way, work requests can differ in size, and do not have to 447 * be a power of 2 in size, saving memory and speeding up send 448 * WR posting. Unfortunately, if we do this then the 449 * wqe_index field in CQEs can't be used to look up the WR ID 450 * anymore, so we do this only if selective signaling is off. 451 * 452 * Further, on 32-bit platforms, we can't use vmap() to make 453 * the QP buffer virtually contiguous. Thus we have to use 454 * constant-sized WRs to make sure a WR is always fully within 455 * a single page-sized chunk. 456 * 457 * Finally, we use NOP work requests to pad the end of the 458 * work queue, to avoid wrap-around in the middle of WR. We 459 * set NEC bit to avoid getting completions with error for 460 * these NOP WRs, but since NEC is only supported starting 461 * with firmware 2.2.232, we use constant-sized WRs for older 462 * firmware. 463 * 464 * And, since MLX QPs only support SEND, we use constant-sized 465 * WRs in this case. 466 * 467 * We look for the smallest value of wqe_shift such that the 468 * resulting number of wqes does not exceed device 469 * capabilities. 470 * 471 * We set WQE size to at least 64 bytes, this way stamping 472 * invalidates each WQE. 473 */ 474 if (dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC && 475 qp->sq_signal_bits && BITS_PER_LONG == 64 && 476 type != MLX4_IB_QPT_SMI && type != MLX4_IB_QPT_GSI && 477 !(type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_PROXY_SMI | 478 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) 479 qp->sq.wqe_shift = ilog2(64); 480 else 481 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s)); 482 483 for (;;) { 484 qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift); 485 486 /* 487 * We need to leave 2 KB + 1 WR of headroom in the SQ to 488 * allow HW to prefetch. 489 */ 490 qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr; 491 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr * 492 qp->sq_max_wqes_per_wr + 493 qp->sq_spare_wqes); 494 495 if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes) 496 break; 497 498 if (qp->sq_max_wqes_per_wr <= 1) 499 return -EINVAL; 500 501 ++qp->sq.wqe_shift; 502 } 503 504 qp->sq.max_gs = (min(dev->dev->caps.max_sq_desc_sz, 505 (qp->sq_max_wqes_per_wr << qp->sq.wqe_shift)) - 506 send_wqe_overhead(type, qp->flags)) / 507 sizeof (struct mlx4_wqe_data_seg); 508 509 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + 510 (qp->sq.wqe_cnt << qp->sq.wqe_shift); 511 if (qp->rq.wqe_shift > qp->sq.wqe_shift) { 512 qp->rq.offset = 0; 513 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift; 514 } else { 515 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift; 516 qp->sq.offset = 0; 517 } 518 519 cap->max_send_wr = qp->sq.max_post = 520 (qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr; 521 cap->max_send_sge = min(qp->sq.max_gs, 522 min(dev->dev->caps.max_sq_sg, 523 dev->dev->caps.max_rq_sg)); 524 /* We don't support inline sends for kernel QPs (yet) */ 525 cap->max_inline_data = 0; 526 527 return 0; 528 } 529 530 static int set_user_sq_size(struct mlx4_ib_dev *dev, 531 struct mlx4_ib_qp *qp, 532 struct mlx4_ib_create_qp *ucmd) 533 { 534 /* Sanity check SQ size before proceeding */ 535 if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes || 536 ucmd->log_sq_stride > 537 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) || 538 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE) 539 return -EINVAL; 540 541 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count; 542 qp->sq.wqe_shift = ucmd->log_sq_stride; 543 544 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + 545 (qp->sq.wqe_cnt << qp->sq.wqe_shift); 546 547 return 0; 548 } 549 550 static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp) 551 { 552 int i; 553 554 qp->sqp_proxy_rcv = 555 kmalloc(sizeof (struct mlx4_ib_buf) * qp->rq.wqe_cnt, 556 GFP_KERNEL); 557 if (!qp->sqp_proxy_rcv) 558 return -ENOMEM; 559 for (i = 0; i < qp->rq.wqe_cnt; i++) { 560 qp->sqp_proxy_rcv[i].addr = 561 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr), 562 GFP_KERNEL); 563 if (!qp->sqp_proxy_rcv[i].addr) 564 goto err; 565 qp->sqp_proxy_rcv[i].map = 566 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr, 567 sizeof (struct mlx4_ib_proxy_sqp_hdr), 568 DMA_FROM_DEVICE); 569 if (ib_dma_mapping_error(dev, qp->sqp_proxy_rcv[i].map)) { 570 kfree(qp->sqp_proxy_rcv[i].addr); 571 goto err; 572 } 573 } 574 return 0; 575 576 err: 577 while (i > 0) { 578 --i; 579 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map, 580 sizeof (struct mlx4_ib_proxy_sqp_hdr), 581 DMA_FROM_DEVICE); 582 kfree(qp->sqp_proxy_rcv[i].addr); 583 } 584 kfree(qp->sqp_proxy_rcv); 585 qp->sqp_proxy_rcv = NULL; 586 return -ENOMEM; 587 } 588 589 static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp) 590 { 591 int i; 592 593 for (i = 0; i < qp->rq.wqe_cnt; i++) { 594 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map, 595 sizeof (struct mlx4_ib_proxy_sqp_hdr), 596 DMA_FROM_DEVICE); 597 kfree(qp->sqp_proxy_rcv[i].addr); 598 } 599 kfree(qp->sqp_proxy_rcv); 600 } 601 602 static int qp_has_rq(struct ib_qp_init_attr *attr) 603 { 604 if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT) 605 return 0; 606 607 return !attr->srq; 608 } 609 610 static int qp0_enabled_vf(struct mlx4_dev *dev, int qpn) 611 { 612 int i; 613 for (i = 0; i < dev->caps.num_ports; i++) { 614 if (qpn == dev->caps.qp0_proxy[i]) 615 return !!dev->caps.qp0_qkey[i]; 616 } 617 return 0; 618 } 619 620 static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd, 621 struct ib_qp_init_attr *init_attr, 622 struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp, 623 gfp_t gfp) 624 { 625 int qpn; 626 int err; 627 struct mlx4_ib_sqp *sqp; 628 struct mlx4_ib_qp *qp; 629 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type; 630 struct mlx4_ib_cq *mcq; 631 unsigned long flags; 632 633 /* When tunneling special qps, we use a plain UD qp */ 634 if (sqpn) { 635 if (mlx4_is_mfunc(dev->dev) && 636 (!mlx4_is_master(dev->dev) || 637 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) { 638 if (init_attr->qp_type == IB_QPT_GSI) 639 qp_type = MLX4_IB_QPT_PROXY_GSI; 640 else { 641 if (mlx4_is_master(dev->dev) || 642 qp0_enabled_vf(dev->dev, sqpn)) 643 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER; 644 else 645 qp_type = MLX4_IB_QPT_PROXY_SMI; 646 } 647 } 648 qpn = sqpn; 649 /* add extra sg entry for tunneling */ 650 init_attr->cap.max_recv_sge++; 651 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) { 652 struct mlx4_ib_qp_tunnel_init_attr *tnl_init = 653 container_of(init_attr, 654 struct mlx4_ib_qp_tunnel_init_attr, init_attr); 655 if ((tnl_init->proxy_qp_type != IB_QPT_SMI && 656 tnl_init->proxy_qp_type != IB_QPT_GSI) || 657 !mlx4_is_master(dev->dev)) 658 return -EINVAL; 659 if (tnl_init->proxy_qp_type == IB_QPT_GSI) 660 qp_type = MLX4_IB_QPT_TUN_GSI; 661 else if (tnl_init->slave == mlx4_master_func_num(dev->dev) || 662 mlx4_vf_smi_enabled(dev->dev, tnl_init->slave, 663 tnl_init->port)) 664 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER; 665 else 666 qp_type = MLX4_IB_QPT_TUN_SMI; 667 /* we are definitely in the PPF here, since we are creating 668 * tunnel QPs. base_tunnel_sqpn is therefore valid. */ 669 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave 670 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1; 671 sqpn = qpn; 672 } 673 674 if (!*caller_qp) { 675 if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI || 676 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER | 677 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) { 678 sqp = kzalloc(sizeof (struct mlx4_ib_sqp), gfp); 679 if (!sqp) 680 return -ENOMEM; 681 qp = &sqp->qp; 682 qp->pri.vid = 0xFFFF; 683 qp->alt.vid = 0xFFFF; 684 } else { 685 qp = kzalloc(sizeof (struct mlx4_ib_qp), gfp); 686 if (!qp) 687 return -ENOMEM; 688 qp->pri.vid = 0xFFFF; 689 qp->alt.vid = 0xFFFF; 690 } 691 } else 692 qp = *caller_qp; 693 694 qp->mlx4_ib_qp_type = qp_type; 695 696 mutex_init(&qp->mutex); 697 spin_lock_init(&qp->sq.lock); 698 spin_lock_init(&qp->rq.lock); 699 INIT_LIST_HEAD(&qp->gid_list); 700 INIT_LIST_HEAD(&qp->steering_rules); 701 702 qp->state = IB_QPS_RESET; 703 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) 704 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); 705 706 err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, qp_has_rq(init_attr), qp); 707 if (err) 708 goto err; 709 710 if (pd->uobject) { 711 struct mlx4_ib_create_qp ucmd; 712 713 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { 714 err = -EFAULT; 715 goto err; 716 } 717 718 qp->sq_no_prefetch = ucmd.sq_no_prefetch; 719 720 err = set_user_sq_size(dev, qp, &ucmd); 721 if (err) 722 goto err; 723 724 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, 725 qp->buf_size, 0, 0); 726 if (IS_ERR(qp->umem)) { 727 err = PTR_ERR(qp->umem); 728 goto err; 729 } 730 731 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem), 732 ilog2(qp->umem->page_size), &qp->mtt); 733 if (err) 734 goto err_buf; 735 736 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem); 737 if (err) 738 goto err_mtt; 739 740 if (qp_has_rq(init_attr)) { 741 err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context), 742 ucmd.db_addr, &qp->db); 743 if (err) 744 goto err_mtt; 745 } 746 } else { 747 qp->sq_no_prefetch = 0; 748 749 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) 750 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK; 751 752 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO) 753 qp->flags |= MLX4_IB_QP_LSO; 754 755 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) { 756 if (dev->steering_support == 757 MLX4_STEERING_MODE_DEVICE_MANAGED) 758 qp->flags |= MLX4_IB_QP_NETIF; 759 else 760 goto err; 761 } 762 763 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp); 764 if (err) 765 goto err; 766 767 if (qp_has_rq(init_attr)) { 768 err = mlx4_db_alloc(dev->dev, &qp->db, 0, gfp); 769 if (err) 770 goto err; 771 772 *qp->db.db = 0; 773 } 774 775 if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf, gfp)) { 776 err = -ENOMEM; 777 goto err_db; 778 } 779 780 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift, 781 &qp->mtt); 782 if (err) 783 goto err_buf; 784 785 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf, gfp); 786 if (err) 787 goto err_mtt; 788 789 qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), gfp); 790 qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), gfp); 791 if (!qp->sq.wrid || !qp->rq.wrid) { 792 err = -ENOMEM; 793 goto err_wrid; 794 } 795 } 796 797 if (sqpn) { 798 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 799 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) { 800 if (alloc_proxy_bufs(pd->device, qp)) { 801 err = -ENOMEM; 802 goto err_wrid; 803 } 804 } 805 } else { 806 /* Raw packet QPNs may not have bits 6,7 set in their qp_num; 807 * otherwise, the WQE BlueFlame setup flow wrongly causes 808 * VLAN insertion. */ 809 if (init_attr->qp_type == IB_QPT_RAW_PACKET) 810 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn, 811 (init_attr->cap.max_send_wr ? 812 MLX4_RESERVE_ETH_BF_QP : 0) | 813 (init_attr->cap.max_recv_wr ? 814 MLX4_RESERVE_A0_QP : 0)); 815 else 816 if (qp->flags & MLX4_IB_QP_NETIF) 817 err = mlx4_ib_steer_qp_alloc(dev, 1, &qpn); 818 else 819 err = mlx4_qp_reserve_range(dev->dev, 1, 1, 820 &qpn, 0); 821 if (err) 822 goto err_proxy; 823 } 824 825 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp, gfp); 826 if (err) 827 goto err_qpn; 828 829 if (init_attr->qp_type == IB_QPT_XRC_TGT) 830 qp->mqp.qpn |= (1 << 23); 831 832 /* 833 * Hardware wants QPN written in big-endian order (after 834 * shifting) for send doorbell. Precompute this value to save 835 * a little bit when posting sends. 836 */ 837 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8); 838 839 qp->mqp.event = mlx4_ib_qp_event; 840 if (!*caller_qp) 841 *caller_qp = qp; 842 843 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags); 844 mlx4_ib_lock_cqs(to_mcq(init_attr->send_cq), 845 to_mcq(init_attr->recv_cq)); 846 /* Maintain device to QPs access, needed for further handling 847 * via reset flow 848 */ 849 list_add_tail(&qp->qps_list, &dev->qp_list); 850 /* Maintain CQ to QPs access, needed for further handling 851 * via reset flow 852 */ 853 mcq = to_mcq(init_attr->send_cq); 854 list_add_tail(&qp->cq_send_list, &mcq->send_qp_list); 855 mcq = to_mcq(init_attr->recv_cq); 856 list_add_tail(&qp->cq_recv_list, &mcq->recv_qp_list); 857 mlx4_ib_unlock_cqs(to_mcq(init_attr->send_cq), 858 to_mcq(init_attr->recv_cq)); 859 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags); 860 return 0; 861 862 err_qpn: 863 if (!sqpn) { 864 if (qp->flags & MLX4_IB_QP_NETIF) 865 mlx4_ib_steer_qp_free(dev, qpn, 1); 866 else 867 mlx4_qp_release_range(dev->dev, qpn, 1); 868 } 869 err_proxy: 870 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI) 871 free_proxy_bufs(pd->device, qp); 872 err_wrid: 873 if (pd->uobject) { 874 if (qp_has_rq(init_attr)) 875 mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db); 876 } else { 877 kfree(qp->sq.wrid); 878 kfree(qp->rq.wrid); 879 } 880 881 err_mtt: 882 mlx4_mtt_cleanup(dev->dev, &qp->mtt); 883 884 err_buf: 885 if (pd->uobject) 886 ib_umem_release(qp->umem); 887 else 888 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); 889 890 err_db: 891 if (!pd->uobject && qp_has_rq(init_attr)) 892 mlx4_db_free(dev->dev, &qp->db); 893 894 err: 895 if (!*caller_qp) 896 kfree(qp); 897 return err; 898 } 899 900 static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state) 901 { 902 switch (state) { 903 case IB_QPS_RESET: return MLX4_QP_STATE_RST; 904 case IB_QPS_INIT: return MLX4_QP_STATE_INIT; 905 case IB_QPS_RTR: return MLX4_QP_STATE_RTR; 906 case IB_QPS_RTS: return MLX4_QP_STATE_RTS; 907 case IB_QPS_SQD: return MLX4_QP_STATE_SQD; 908 case IB_QPS_SQE: return MLX4_QP_STATE_SQER; 909 case IB_QPS_ERR: return MLX4_QP_STATE_ERR; 910 default: return -1; 911 } 912 } 913 914 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) 915 __acquires(&send_cq->lock) __acquires(&recv_cq->lock) 916 { 917 if (send_cq == recv_cq) { 918 spin_lock(&send_cq->lock); 919 __acquire(&recv_cq->lock); 920 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { 921 spin_lock(&send_cq->lock); 922 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING); 923 } else { 924 spin_lock(&recv_cq->lock); 925 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING); 926 } 927 } 928 929 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq) 930 __releases(&send_cq->lock) __releases(&recv_cq->lock) 931 { 932 if (send_cq == recv_cq) { 933 __release(&recv_cq->lock); 934 spin_unlock(&send_cq->lock); 935 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { 936 spin_unlock(&recv_cq->lock); 937 spin_unlock(&send_cq->lock); 938 } else { 939 spin_unlock(&send_cq->lock); 940 spin_unlock(&recv_cq->lock); 941 } 942 } 943 944 static void del_gid_entries(struct mlx4_ib_qp *qp) 945 { 946 struct mlx4_ib_gid_entry *ge, *tmp; 947 948 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) { 949 list_del(&ge->list); 950 kfree(ge); 951 } 952 } 953 954 static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp) 955 { 956 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT) 957 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd); 958 else 959 return to_mpd(qp->ibqp.pd); 960 } 961 962 static void get_cqs(struct mlx4_ib_qp *qp, 963 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq) 964 { 965 switch (qp->ibqp.qp_type) { 966 case IB_QPT_XRC_TGT: 967 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq); 968 *recv_cq = *send_cq; 969 break; 970 case IB_QPT_XRC_INI: 971 *send_cq = to_mcq(qp->ibqp.send_cq); 972 *recv_cq = *send_cq; 973 break; 974 default: 975 *send_cq = to_mcq(qp->ibqp.send_cq); 976 *recv_cq = to_mcq(qp->ibqp.recv_cq); 977 break; 978 } 979 } 980 981 static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, 982 int is_user) 983 { 984 struct mlx4_ib_cq *send_cq, *recv_cq; 985 unsigned long flags; 986 987 if (qp->state != IB_QPS_RESET) { 988 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state), 989 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp)) 990 pr_warn("modify QP %06x to RESET failed.\n", 991 qp->mqp.qpn); 992 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) { 993 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 994 qp->pri.smac = 0; 995 qp->pri.smac_port = 0; 996 } 997 if (qp->alt.smac) { 998 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 999 qp->alt.smac = 0; 1000 } 1001 if (qp->pri.vid < 0x1000) { 1002 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid); 1003 qp->pri.vid = 0xFFFF; 1004 qp->pri.candidate_vid = 0xFFFF; 1005 qp->pri.update_vid = 0; 1006 } 1007 if (qp->alt.vid < 0x1000) { 1008 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid); 1009 qp->alt.vid = 0xFFFF; 1010 qp->alt.candidate_vid = 0xFFFF; 1011 qp->alt.update_vid = 0; 1012 } 1013 } 1014 1015 get_cqs(qp, &send_cq, &recv_cq); 1016 1017 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags); 1018 mlx4_ib_lock_cqs(send_cq, recv_cq); 1019 1020 /* del from lists under both locks above to protect reset flow paths */ 1021 list_del(&qp->qps_list); 1022 list_del(&qp->cq_send_list); 1023 list_del(&qp->cq_recv_list); 1024 if (!is_user) { 1025 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn, 1026 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL); 1027 if (send_cq != recv_cq) 1028 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); 1029 } 1030 1031 mlx4_qp_remove(dev->dev, &qp->mqp); 1032 1033 mlx4_ib_unlock_cqs(send_cq, recv_cq); 1034 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags); 1035 1036 mlx4_qp_free(dev->dev, &qp->mqp); 1037 1038 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp)) { 1039 if (qp->flags & MLX4_IB_QP_NETIF) 1040 mlx4_ib_steer_qp_free(dev, qp->mqp.qpn, 1); 1041 else 1042 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1); 1043 } 1044 1045 mlx4_mtt_cleanup(dev->dev, &qp->mtt); 1046 1047 if (is_user) { 1048 if (qp->rq.wqe_cnt) 1049 mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context), 1050 &qp->db); 1051 ib_umem_release(qp->umem); 1052 } else { 1053 kfree(qp->sq.wrid); 1054 kfree(qp->rq.wrid); 1055 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 1056 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) 1057 free_proxy_bufs(&dev->ib_dev, qp); 1058 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf); 1059 if (qp->rq.wqe_cnt) 1060 mlx4_db_free(dev->dev, &qp->db); 1061 } 1062 1063 del_gid_entries(qp); 1064 } 1065 1066 static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr) 1067 { 1068 /* Native or PPF */ 1069 if (!mlx4_is_mfunc(dev->dev) || 1070 (mlx4_is_master(dev->dev) && 1071 attr->create_flags & MLX4_IB_SRIOV_SQP)) { 1072 return dev->dev->phys_caps.base_sqpn + 1073 (attr->qp_type == IB_QPT_SMI ? 0 : 2) + 1074 attr->port_num - 1; 1075 } 1076 /* PF or VF -- creating proxies */ 1077 if (attr->qp_type == IB_QPT_SMI) 1078 return dev->dev->caps.qp0_proxy[attr->port_num - 1]; 1079 else 1080 return dev->dev->caps.qp1_proxy[attr->port_num - 1]; 1081 } 1082 1083 struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd, 1084 struct ib_qp_init_attr *init_attr, 1085 struct ib_udata *udata) 1086 { 1087 struct mlx4_ib_qp *qp = NULL; 1088 int err; 1089 u16 xrcdn = 0; 1090 gfp_t gfp; 1091 1092 gfp = (init_attr->create_flags & MLX4_IB_QP_CREATE_USE_GFP_NOIO) ? 1093 GFP_NOIO : GFP_KERNEL; 1094 /* 1095 * We only support LSO, vendor flag1, and multicast loopback blocking, 1096 * and only for kernel UD QPs. 1097 */ 1098 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO | 1099 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK | 1100 MLX4_IB_SRIOV_TUNNEL_QP | 1101 MLX4_IB_SRIOV_SQP | 1102 MLX4_IB_QP_NETIF | 1103 MLX4_IB_QP_CREATE_USE_GFP_NOIO)) 1104 return ERR_PTR(-EINVAL); 1105 1106 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) { 1107 if (init_attr->qp_type != IB_QPT_UD) 1108 return ERR_PTR(-EINVAL); 1109 } 1110 1111 if (init_attr->create_flags && 1112 (udata || 1113 ((init_attr->create_flags & ~(MLX4_IB_SRIOV_SQP | MLX4_IB_QP_CREATE_USE_GFP_NOIO)) && 1114 init_attr->qp_type != IB_QPT_UD) || 1115 ((init_attr->create_flags & MLX4_IB_SRIOV_SQP) && 1116 init_attr->qp_type > IB_QPT_GSI))) 1117 return ERR_PTR(-EINVAL); 1118 1119 switch (init_attr->qp_type) { 1120 case IB_QPT_XRC_TGT: 1121 pd = to_mxrcd(init_attr->xrcd)->pd; 1122 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn; 1123 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq; 1124 /* fall through */ 1125 case IB_QPT_XRC_INI: 1126 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC)) 1127 return ERR_PTR(-ENOSYS); 1128 init_attr->recv_cq = init_attr->send_cq; 1129 /* fall through */ 1130 case IB_QPT_RC: 1131 case IB_QPT_UC: 1132 case IB_QPT_RAW_PACKET: 1133 qp = kzalloc(sizeof *qp, gfp); 1134 if (!qp) 1135 return ERR_PTR(-ENOMEM); 1136 qp->pri.vid = 0xFFFF; 1137 qp->alt.vid = 0xFFFF; 1138 /* fall through */ 1139 case IB_QPT_UD: 1140 { 1141 err = create_qp_common(to_mdev(pd->device), pd, init_attr, 1142 udata, 0, &qp, gfp); 1143 if (err) 1144 return ERR_PTR(err); 1145 1146 qp->ibqp.qp_num = qp->mqp.qpn; 1147 qp->xrcdn = xrcdn; 1148 1149 break; 1150 } 1151 case IB_QPT_SMI: 1152 case IB_QPT_GSI: 1153 { 1154 /* Userspace is not allowed to create special QPs: */ 1155 if (udata) 1156 return ERR_PTR(-EINVAL); 1157 1158 err = create_qp_common(to_mdev(pd->device), pd, init_attr, udata, 1159 get_sqp_num(to_mdev(pd->device), init_attr), 1160 &qp, gfp); 1161 if (err) 1162 return ERR_PTR(err); 1163 1164 qp->port = init_attr->port_num; 1165 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1; 1166 1167 break; 1168 } 1169 default: 1170 /* Don't support raw QPs */ 1171 return ERR_PTR(-EINVAL); 1172 } 1173 1174 return &qp->ibqp; 1175 } 1176 1177 int mlx4_ib_destroy_qp(struct ib_qp *qp) 1178 { 1179 struct mlx4_ib_dev *dev = to_mdev(qp->device); 1180 struct mlx4_ib_qp *mqp = to_mqp(qp); 1181 struct mlx4_ib_pd *pd; 1182 1183 if (is_qp0(dev, mqp)) 1184 mlx4_CLOSE_PORT(dev->dev, mqp->port); 1185 1186 if (dev->qp1_proxy[mqp->port - 1] == mqp) { 1187 mutex_lock(&dev->qp1_proxy_lock[mqp->port - 1]); 1188 dev->qp1_proxy[mqp->port - 1] = NULL; 1189 mutex_unlock(&dev->qp1_proxy_lock[mqp->port - 1]); 1190 } 1191 1192 pd = get_pd(mqp); 1193 destroy_qp_common(dev, mqp, !!pd->ibpd.uobject); 1194 1195 if (is_sqp(dev, mqp)) 1196 kfree(to_msqp(mqp)); 1197 else 1198 kfree(mqp); 1199 1200 return 0; 1201 } 1202 1203 static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type) 1204 { 1205 switch (type) { 1206 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC; 1207 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC; 1208 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD; 1209 case MLX4_IB_QPT_XRC_INI: 1210 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC; 1211 case MLX4_IB_QPT_SMI: 1212 case MLX4_IB_QPT_GSI: 1213 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX; 1214 1215 case MLX4_IB_QPT_PROXY_SMI_OWNER: 1216 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ? 1217 MLX4_QP_ST_MLX : -1); 1218 case MLX4_IB_QPT_PROXY_SMI: 1219 case MLX4_IB_QPT_TUN_SMI: 1220 case MLX4_IB_QPT_PROXY_GSI: 1221 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ? 1222 MLX4_QP_ST_UD : -1); 1223 default: return -1; 1224 } 1225 } 1226 1227 static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr, 1228 int attr_mask) 1229 { 1230 u8 dest_rd_atomic; 1231 u32 access_flags; 1232 u32 hw_access_flags = 0; 1233 1234 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1235 dest_rd_atomic = attr->max_dest_rd_atomic; 1236 else 1237 dest_rd_atomic = qp->resp_depth; 1238 1239 if (attr_mask & IB_QP_ACCESS_FLAGS) 1240 access_flags = attr->qp_access_flags; 1241 else 1242 access_flags = qp->atomic_rd_en; 1243 1244 if (!dest_rd_atomic) 1245 access_flags &= IB_ACCESS_REMOTE_WRITE; 1246 1247 if (access_flags & IB_ACCESS_REMOTE_READ) 1248 hw_access_flags |= MLX4_QP_BIT_RRE; 1249 if (access_flags & IB_ACCESS_REMOTE_ATOMIC) 1250 hw_access_flags |= MLX4_QP_BIT_RAE; 1251 if (access_flags & IB_ACCESS_REMOTE_WRITE) 1252 hw_access_flags |= MLX4_QP_BIT_RWE; 1253 1254 return cpu_to_be32(hw_access_flags); 1255 } 1256 1257 static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr, 1258 int attr_mask) 1259 { 1260 if (attr_mask & IB_QP_PKEY_INDEX) 1261 sqp->pkey_index = attr->pkey_index; 1262 if (attr_mask & IB_QP_QKEY) 1263 sqp->qkey = attr->qkey; 1264 if (attr_mask & IB_QP_SQ_PSN) 1265 sqp->send_psn = attr->sq_psn; 1266 } 1267 1268 static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port) 1269 { 1270 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6); 1271 } 1272 1273 static int _mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah, 1274 u64 smac, u16 vlan_tag, struct mlx4_qp_path *path, 1275 struct mlx4_roce_smac_vlan_info *smac_info, u8 port) 1276 { 1277 int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) == 1278 IB_LINK_LAYER_ETHERNET; 1279 int vidx; 1280 int smac_index; 1281 int err; 1282 1283 1284 path->grh_mylmc = ah->src_path_bits & 0x7f; 1285 path->rlid = cpu_to_be16(ah->dlid); 1286 if (ah->static_rate) { 1287 path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET; 1288 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && 1289 !(1 << path->static_rate & dev->dev->caps.stat_rate_support)) 1290 --path->static_rate; 1291 } else 1292 path->static_rate = 0; 1293 1294 if (ah->ah_flags & IB_AH_GRH) { 1295 if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len[port]) { 1296 pr_err("sgid_index (%u) too large. max is %d\n", 1297 ah->grh.sgid_index, dev->dev->caps.gid_table_len[port] - 1); 1298 return -1; 1299 } 1300 1301 path->grh_mylmc |= 1 << 7; 1302 path->mgid_index = ah->grh.sgid_index; 1303 path->hop_limit = ah->grh.hop_limit; 1304 path->tclass_flowlabel = 1305 cpu_to_be32((ah->grh.traffic_class << 20) | 1306 (ah->grh.flow_label)); 1307 memcpy(path->rgid, ah->grh.dgid.raw, 16); 1308 } 1309 1310 if (is_eth) { 1311 if (!(ah->ah_flags & IB_AH_GRH)) 1312 return -1; 1313 1314 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | 1315 ((port - 1) << 6) | ((ah->sl & 7) << 3); 1316 1317 path->feup |= MLX4_FEUP_FORCE_ETH_UP; 1318 if (vlan_tag < 0x1000) { 1319 if (smac_info->vid < 0x1000) { 1320 /* both valid vlan ids */ 1321 if (smac_info->vid != vlan_tag) { 1322 /* different VIDs. unreg old and reg new */ 1323 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx); 1324 if (err) 1325 return err; 1326 smac_info->candidate_vid = vlan_tag; 1327 smac_info->candidate_vlan_index = vidx; 1328 smac_info->candidate_vlan_port = port; 1329 smac_info->update_vid = 1; 1330 path->vlan_index = vidx; 1331 } else { 1332 path->vlan_index = smac_info->vlan_index; 1333 } 1334 } else { 1335 /* no current vlan tag in qp */ 1336 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx); 1337 if (err) 1338 return err; 1339 smac_info->candidate_vid = vlan_tag; 1340 smac_info->candidate_vlan_index = vidx; 1341 smac_info->candidate_vlan_port = port; 1342 smac_info->update_vid = 1; 1343 path->vlan_index = vidx; 1344 } 1345 path->feup |= MLX4_FVL_FORCE_ETH_VLAN; 1346 path->fl = 1 << 6; 1347 } else { 1348 /* have current vlan tag. unregister it at modify-qp success */ 1349 if (smac_info->vid < 0x1000) { 1350 smac_info->candidate_vid = 0xFFFF; 1351 smac_info->update_vid = 1; 1352 } 1353 } 1354 1355 /* get smac_index for RoCE use. 1356 * If no smac was yet assigned, register one. 1357 * If one was already assigned, but the new mac differs, 1358 * unregister the old one and register the new one. 1359 */ 1360 if ((!smac_info->smac && !smac_info->smac_port) || 1361 smac_info->smac != smac) { 1362 /* register candidate now, unreg if needed, after success */ 1363 smac_index = mlx4_register_mac(dev->dev, port, smac); 1364 if (smac_index >= 0) { 1365 smac_info->candidate_smac_index = smac_index; 1366 smac_info->candidate_smac = smac; 1367 smac_info->candidate_smac_port = port; 1368 } else { 1369 return -EINVAL; 1370 } 1371 } else { 1372 smac_index = smac_info->smac_index; 1373 } 1374 1375 memcpy(path->dmac, ah->dmac, 6); 1376 path->ackto = MLX4_IB_LINK_TYPE_ETH; 1377 /* put MAC table smac index for IBoE */ 1378 path->grh_mylmc = (u8) (smac_index) | 0x80; 1379 } else { 1380 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | 1381 ((port - 1) << 6) | ((ah->sl & 0xf) << 2); 1382 } 1383 1384 return 0; 1385 } 1386 1387 static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_qp_attr *qp, 1388 enum ib_qp_attr_mask qp_attr_mask, 1389 struct mlx4_ib_qp *mqp, 1390 struct mlx4_qp_path *path, u8 port) 1391 { 1392 return _mlx4_set_path(dev, &qp->ah_attr, 1393 mlx4_mac_to_u64((u8 *)qp->smac), 1394 (qp_attr_mask & IB_QP_VID) ? qp->vlan_id : 0xffff, 1395 path, &mqp->pri, port); 1396 } 1397 1398 static int mlx4_set_alt_path(struct mlx4_ib_dev *dev, 1399 const struct ib_qp_attr *qp, 1400 enum ib_qp_attr_mask qp_attr_mask, 1401 struct mlx4_ib_qp *mqp, 1402 struct mlx4_qp_path *path, u8 port) 1403 { 1404 return _mlx4_set_path(dev, &qp->alt_ah_attr, 1405 mlx4_mac_to_u64((u8 *)qp->alt_smac), 1406 (qp_attr_mask & IB_QP_ALT_VID) ? 1407 qp->alt_vlan_id : 0xffff, 1408 path, &mqp->alt, port); 1409 } 1410 1411 static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp) 1412 { 1413 struct mlx4_ib_gid_entry *ge, *tmp; 1414 1415 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) { 1416 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) { 1417 ge->added = 1; 1418 ge->port = qp->port; 1419 } 1420 } 1421 } 1422 1423 static int handle_eth_ud_smac_index(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, u8 *smac, 1424 struct mlx4_qp_context *context) 1425 { 1426 u64 u64_mac; 1427 int smac_index; 1428 1429 u64_mac = atomic64_read(&dev->iboe.mac[qp->port - 1]); 1430 1431 context->pri_path.sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | ((qp->port - 1) << 6); 1432 if (!qp->pri.smac && !qp->pri.smac_port) { 1433 smac_index = mlx4_register_mac(dev->dev, qp->port, u64_mac); 1434 if (smac_index >= 0) { 1435 qp->pri.candidate_smac_index = smac_index; 1436 qp->pri.candidate_smac = u64_mac; 1437 qp->pri.candidate_smac_port = qp->port; 1438 context->pri_path.grh_mylmc = 0x80 | (u8) smac_index; 1439 } else { 1440 return -ENOENT; 1441 } 1442 } 1443 return 0; 1444 } 1445 1446 static int __mlx4_ib_modify_qp(struct ib_qp *ibqp, 1447 const struct ib_qp_attr *attr, int attr_mask, 1448 enum ib_qp_state cur_state, enum ib_qp_state new_state) 1449 { 1450 struct mlx4_ib_dev *dev = to_mdev(ibqp->device); 1451 struct mlx4_ib_qp *qp = to_mqp(ibqp); 1452 struct mlx4_ib_pd *pd; 1453 struct mlx4_ib_cq *send_cq, *recv_cq; 1454 struct mlx4_qp_context *context; 1455 enum mlx4_qp_optpar optpar = 0; 1456 int sqd_event; 1457 int steer_qp = 0; 1458 int err = -EINVAL; 1459 1460 /* APM is not supported under RoCE */ 1461 if (attr_mask & IB_QP_ALT_PATH && 1462 rdma_port_get_link_layer(&dev->ib_dev, qp->port) == 1463 IB_LINK_LAYER_ETHERNET) 1464 return -ENOTSUPP; 1465 1466 context = kzalloc(sizeof *context, GFP_KERNEL); 1467 if (!context) 1468 return -ENOMEM; 1469 1470 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) | 1471 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16)); 1472 1473 if (!(attr_mask & IB_QP_PATH_MIG_STATE)) 1474 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); 1475 else { 1476 optpar |= MLX4_QP_OPTPAR_PM_STATE; 1477 switch (attr->path_mig_state) { 1478 case IB_MIG_MIGRATED: 1479 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); 1480 break; 1481 case IB_MIG_REARM: 1482 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11); 1483 break; 1484 case IB_MIG_ARMED: 1485 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11); 1486 break; 1487 } 1488 } 1489 1490 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) 1491 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11; 1492 else if (ibqp->qp_type == IB_QPT_RAW_PACKET) 1493 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX; 1494 else if (ibqp->qp_type == IB_QPT_UD) { 1495 if (qp->flags & MLX4_IB_QP_LSO) 1496 context->mtu_msgmax = (IB_MTU_4096 << 5) | 1497 ilog2(dev->dev->caps.max_gso_sz); 1498 else 1499 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12; 1500 } else if (attr_mask & IB_QP_PATH_MTU) { 1501 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) { 1502 pr_err("path MTU (%u) is invalid\n", 1503 attr->path_mtu); 1504 goto out; 1505 } 1506 context->mtu_msgmax = (attr->path_mtu << 5) | 1507 ilog2(dev->dev->caps.max_msg_sz); 1508 } 1509 1510 if (qp->rq.wqe_cnt) 1511 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3; 1512 context->rq_size_stride |= qp->rq.wqe_shift - 4; 1513 1514 if (qp->sq.wqe_cnt) 1515 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3; 1516 context->sq_size_stride |= qp->sq.wqe_shift - 4; 1517 1518 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) { 1519 context->sq_size_stride |= !!qp->sq_no_prefetch << 7; 1520 context->xrcd = cpu_to_be32((u32) qp->xrcdn); 1521 if (ibqp->qp_type == IB_QPT_RAW_PACKET) 1522 context->param3 |= cpu_to_be32(1 << 30); 1523 } 1524 1525 if (qp->ibqp.uobject) 1526 context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index); 1527 else 1528 context->usr_page = cpu_to_be32(dev->priv_uar.index); 1529 1530 if (attr_mask & IB_QP_DEST_QPN) 1531 context->remote_qpn = cpu_to_be32(attr->dest_qp_num); 1532 1533 if (attr_mask & IB_QP_PORT) { 1534 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD && 1535 !(attr_mask & IB_QP_AV)) { 1536 mlx4_set_sched(&context->pri_path, attr->port_num); 1537 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE; 1538 } 1539 } 1540 1541 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) { 1542 if (dev->counters[qp->port - 1].index != -1) { 1543 context->pri_path.counter_index = 1544 dev->counters[qp->port - 1].index; 1545 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX; 1546 } else 1547 context->pri_path.counter_index = 1548 MLX4_SINK_COUNTER_INDEX(dev->dev); 1549 1550 if (qp->flags & MLX4_IB_QP_NETIF) { 1551 mlx4_ib_steer_qp_reg(dev, qp, 1); 1552 steer_qp = 1; 1553 } 1554 } 1555 1556 if (attr_mask & IB_QP_PKEY_INDEX) { 1557 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) 1558 context->pri_path.disable_pkey_check = 0x40; 1559 context->pri_path.pkey_index = attr->pkey_index; 1560 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX; 1561 } 1562 1563 if (attr_mask & IB_QP_AV) { 1564 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path, 1565 attr_mask & IB_QP_PORT ? 1566 attr->port_num : qp->port)) 1567 goto out; 1568 1569 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH | 1570 MLX4_QP_OPTPAR_SCHED_QUEUE); 1571 } 1572 1573 if (attr_mask & IB_QP_TIMEOUT) { 1574 context->pri_path.ackto |= attr->timeout << 3; 1575 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT; 1576 } 1577 1578 if (attr_mask & IB_QP_ALT_PATH) { 1579 if (attr->alt_port_num == 0 || 1580 attr->alt_port_num > dev->dev->caps.num_ports) 1581 goto out; 1582 1583 if (attr->alt_pkey_index >= 1584 dev->dev->caps.pkey_table_len[attr->alt_port_num]) 1585 goto out; 1586 1587 if (mlx4_set_alt_path(dev, attr, attr_mask, qp, 1588 &context->alt_path, 1589 attr->alt_port_num)) 1590 goto out; 1591 1592 context->alt_path.pkey_index = attr->alt_pkey_index; 1593 context->alt_path.ackto = attr->alt_timeout << 3; 1594 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH; 1595 } 1596 1597 pd = get_pd(qp); 1598 get_cqs(qp, &send_cq, &recv_cq); 1599 context->pd = cpu_to_be32(pd->pdn); 1600 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn); 1601 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn); 1602 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28); 1603 1604 /* Set "fast registration enabled" for all kernel QPs */ 1605 if (!qp->ibqp.uobject) 1606 context->params1 |= cpu_to_be32(1 << 11); 1607 1608 if (attr_mask & IB_QP_RNR_RETRY) { 1609 context->params1 |= cpu_to_be32(attr->rnr_retry << 13); 1610 optpar |= MLX4_QP_OPTPAR_RNR_RETRY; 1611 } 1612 1613 if (attr_mask & IB_QP_RETRY_CNT) { 1614 context->params1 |= cpu_to_be32(attr->retry_cnt << 16); 1615 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT; 1616 } 1617 1618 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) { 1619 if (attr->max_rd_atomic) 1620 context->params1 |= 1621 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21); 1622 optpar |= MLX4_QP_OPTPAR_SRA_MAX; 1623 } 1624 1625 if (attr_mask & IB_QP_SQ_PSN) 1626 context->next_send_psn = cpu_to_be32(attr->sq_psn); 1627 1628 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) { 1629 if (attr->max_dest_rd_atomic) 1630 context->params2 |= 1631 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21); 1632 optpar |= MLX4_QP_OPTPAR_RRA_MAX; 1633 } 1634 1635 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) { 1636 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask); 1637 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE; 1638 } 1639 1640 if (ibqp->srq) 1641 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC); 1642 1643 if (attr_mask & IB_QP_MIN_RNR_TIMER) { 1644 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24); 1645 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT; 1646 } 1647 if (attr_mask & IB_QP_RQ_PSN) 1648 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn); 1649 1650 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */ 1651 if (attr_mask & IB_QP_QKEY) { 1652 if (qp->mlx4_ib_qp_type & 1653 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) 1654 context->qkey = cpu_to_be32(IB_QP_SET_QKEY); 1655 else { 1656 if (mlx4_is_mfunc(dev->dev) && 1657 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) && 1658 (attr->qkey & MLX4_RESERVED_QKEY_MASK) == 1659 MLX4_RESERVED_QKEY_BASE) { 1660 pr_err("Cannot use reserved QKEY" 1661 " 0x%x (range 0xffff0000..0xffffffff" 1662 " is reserved)\n", attr->qkey); 1663 err = -EINVAL; 1664 goto out; 1665 } 1666 context->qkey = cpu_to_be32(attr->qkey); 1667 } 1668 optpar |= MLX4_QP_OPTPAR_Q_KEY; 1669 } 1670 1671 if (ibqp->srq) 1672 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn); 1673 1674 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) 1675 context->db_rec_addr = cpu_to_be64(qp->db.dma); 1676 1677 if (cur_state == IB_QPS_INIT && 1678 new_state == IB_QPS_RTR && 1679 (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI || 1680 ibqp->qp_type == IB_QPT_UD || 1681 ibqp->qp_type == IB_QPT_RAW_PACKET)) { 1682 context->pri_path.sched_queue = (qp->port - 1) << 6; 1683 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI || 1684 qp->mlx4_ib_qp_type & 1685 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) { 1686 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE; 1687 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI) 1688 context->pri_path.fl = 0x80; 1689 } else { 1690 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) 1691 context->pri_path.fl = 0x80; 1692 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE; 1693 } 1694 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) == 1695 IB_LINK_LAYER_ETHERNET) { 1696 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI || 1697 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) 1698 context->pri_path.feup = 1 << 7; /* don't fsm */ 1699 /* handle smac_index */ 1700 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD || 1701 qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI || 1702 qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) { 1703 err = handle_eth_ud_smac_index(dev, qp, (u8 *)attr->smac, context); 1704 if (err) { 1705 err = -EINVAL; 1706 goto out; 1707 } 1708 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI) 1709 dev->qp1_proxy[qp->port - 1] = qp; 1710 } 1711 } 1712 } 1713 1714 if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET) { 1715 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) | 1716 MLX4_IB_LINK_TYPE_ETH; 1717 if (dev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) { 1718 /* set QP to receive both tunneled & non-tunneled packets */ 1719 if (!(context->flags & cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET))) 1720 context->srqn = cpu_to_be32(7 << 28); 1721 } 1722 } 1723 1724 if (ibqp->qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) { 1725 int is_eth = rdma_port_get_link_layer( 1726 &dev->ib_dev, qp->port) == 1727 IB_LINK_LAYER_ETHERNET; 1728 if (is_eth) { 1729 context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH; 1730 optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH; 1731 } 1732 } 1733 1734 1735 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD && 1736 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify) 1737 sqd_event = 1; 1738 else 1739 sqd_event = 0; 1740 1741 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) 1742 context->rlkey |= (1 << 4); 1743 1744 /* 1745 * Before passing a kernel QP to the HW, make sure that the 1746 * ownership bits of the send queue are set and the SQ 1747 * headroom is stamped so that the hardware doesn't start 1748 * processing stale work requests. 1749 */ 1750 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) { 1751 struct mlx4_wqe_ctrl_seg *ctrl; 1752 int i; 1753 1754 for (i = 0; i < qp->sq.wqe_cnt; ++i) { 1755 ctrl = get_send_wqe(qp, i); 1756 ctrl->owner_opcode = cpu_to_be32(1 << 31); 1757 if (qp->sq_max_wqes_per_wr == 1) 1758 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4); 1759 1760 stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift); 1761 } 1762 } 1763 1764 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state), 1765 to_mlx4_state(new_state), context, optpar, 1766 sqd_event, &qp->mqp); 1767 if (err) 1768 goto out; 1769 1770 qp->state = new_state; 1771 1772 if (attr_mask & IB_QP_ACCESS_FLAGS) 1773 qp->atomic_rd_en = attr->qp_access_flags; 1774 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1775 qp->resp_depth = attr->max_dest_rd_atomic; 1776 if (attr_mask & IB_QP_PORT) { 1777 qp->port = attr->port_num; 1778 update_mcg_macs(dev, qp); 1779 } 1780 if (attr_mask & IB_QP_ALT_PATH) 1781 qp->alt_port = attr->alt_port_num; 1782 1783 if (is_sqp(dev, qp)) 1784 store_sqp_attrs(to_msqp(qp), attr, attr_mask); 1785 1786 /* 1787 * If we moved QP0 to RTR, bring the IB link up; if we moved 1788 * QP0 to RESET or ERROR, bring the link back down. 1789 */ 1790 if (is_qp0(dev, qp)) { 1791 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR) 1792 if (mlx4_INIT_PORT(dev->dev, qp->port)) 1793 pr_warn("INIT_PORT failed for port %d\n", 1794 qp->port); 1795 1796 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR && 1797 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR)) 1798 mlx4_CLOSE_PORT(dev->dev, qp->port); 1799 } 1800 1801 /* 1802 * If we moved a kernel QP to RESET, clean up all old CQ 1803 * entries and reinitialize the QP. 1804 */ 1805 if (new_state == IB_QPS_RESET) { 1806 if (!ibqp->uobject) { 1807 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn, 1808 ibqp->srq ? to_msrq(ibqp->srq) : NULL); 1809 if (send_cq != recv_cq) 1810 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); 1811 1812 qp->rq.head = 0; 1813 qp->rq.tail = 0; 1814 qp->sq.head = 0; 1815 qp->sq.tail = 0; 1816 qp->sq_next_wqe = 0; 1817 if (qp->rq.wqe_cnt) 1818 *qp->db.db = 0; 1819 1820 if (qp->flags & MLX4_IB_QP_NETIF) 1821 mlx4_ib_steer_qp_reg(dev, qp, 0); 1822 } 1823 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) { 1824 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 1825 qp->pri.smac = 0; 1826 qp->pri.smac_port = 0; 1827 } 1828 if (qp->alt.smac) { 1829 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 1830 qp->alt.smac = 0; 1831 } 1832 if (qp->pri.vid < 0x1000) { 1833 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid); 1834 qp->pri.vid = 0xFFFF; 1835 qp->pri.candidate_vid = 0xFFFF; 1836 qp->pri.update_vid = 0; 1837 } 1838 1839 if (qp->alt.vid < 0x1000) { 1840 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid); 1841 qp->alt.vid = 0xFFFF; 1842 qp->alt.candidate_vid = 0xFFFF; 1843 qp->alt.update_vid = 0; 1844 } 1845 } 1846 out: 1847 if (err && steer_qp) 1848 mlx4_ib_steer_qp_reg(dev, qp, 0); 1849 kfree(context); 1850 if (qp->pri.candidate_smac || 1851 (!qp->pri.candidate_smac && qp->pri.candidate_smac_port)) { 1852 if (err) { 1853 mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac); 1854 } else { 1855 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) 1856 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac); 1857 qp->pri.smac = qp->pri.candidate_smac; 1858 qp->pri.smac_index = qp->pri.candidate_smac_index; 1859 qp->pri.smac_port = qp->pri.candidate_smac_port; 1860 } 1861 qp->pri.candidate_smac = 0; 1862 qp->pri.candidate_smac_index = 0; 1863 qp->pri.candidate_smac_port = 0; 1864 } 1865 if (qp->alt.candidate_smac) { 1866 if (err) { 1867 mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac); 1868 } else { 1869 if (qp->alt.smac) 1870 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac); 1871 qp->alt.smac = qp->alt.candidate_smac; 1872 qp->alt.smac_index = qp->alt.candidate_smac_index; 1873 qp->alt.smac_port = qp->alt.candidate_smac_port; 1874 } 1875 qp->alt.candidate_smac = 0; 1876 qp->alt.candidate_smac_index = 0; 1877 qp->alt.candidate_smac_port = 0; 1878 } 1879 1880 if (qp->pri.update_vid) { 1881 if (err) { 1882 if (qp->pri.candidate_vid < 0x1000) 1883 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port, 1884 qp->pri.candidate_vid); 1885 } else { 1886 if (qp->pri.vid < 0x1000) 1887 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, 1888 qp->pri.vid); 1889 qp->pri.vid = qp->pri.candidate_vid; 1890 qp->pri.vlan_port = qp->pri.candidate_vlan_port; 1891 qp->pri.vlan_index = qp->pri.candidate_vlan_index; 1892 } 1893 qp->pri.candidate_vid = 0xFFFF; 1894 qp->pri.update_vid = 0; 1895 } 1896 1897 if (qp->alt.update_vid) { 1898 if (err) { 1899 if (qp->alt.candidate_vid < 0x1000) 1900 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port, 1901 qp->alt.candidate_vid); 1902 } else { 1903 if (qp->alt.vid < 0x1000) 1904 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, 1905 qp->alt.vid); 1906 qp->alt.vid = qp->alt.candidate_vid; 1907 qp->alt.vlan_port = qp->alt.candidate_vlan_port; 1908 qp->alt.vlan_index = qp->alt.candidate_vlan_index; 1909 } 1910 qp->alt.candidate_vid = 0xFFFF; 1911 qp->alt.update_vid = 0; 1912 } 1913 1914 return err; 1915 } 1916 1917 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 1918 int attr_mask, struct ib_udata *udata) 1919 { 1920 struct mlx4_ib_dev *dev = to_mdev(ibqp->device); 1921 struct mlx4_ib_qp *qp = to_mqp(ibqp); 1922 enum ib_qp_state cur_state, new_state; 1923 int err = -EINVAL; 1924 int ll; 1925 mutex_lock(&qp->mutex); 1926 1927 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state; 1928 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; 1929 1930 if (cur_state == new_state && cur_state == IB_QPS_RESET) { 1931 ll = IB_LINK_LAYER_UNSPECIFIED; 1932 } else { 1933 int port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 1934 ll = rdma_port_get_link_layer(&dev->ib_dev, port); 1935 } 1936 1937 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, 1938 attr_mask, ll)) { 1939 pr_debug("qpn 0x%x: invalid attribute mask specified " 1940 "for transition %d to %d. qp_type %d," 1941 " attr_mask 0x%x\n", 1942 ibqp->qp_num, cur_state, new_state, 1943 ibqp->qp_type, attr_mask); 1944 goto out; 1945 } 1946 1947 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) { 1948 if ((cur_state == IB_QPS_RESET) && (new_state == IB_QPS_INIT)) { 1949 if ((ibqp->qp_type == IB_QPT_RC) || 1950 (ibqp->qp_type == IB_QPT_UD) || 1951 (ibqp->qp_type == IB_QPT_UC) || 1952 (ibqp->qp_type == IB_QPT_RAW_PACKET) || 1953 (ibqp->qp_type == IB_QPT_XRC_INI)) { 1954 attr->port_num = mlx4_ib_bond_next_port(dev); 1955 } 1956 } else { 1957 /* no sense in changing port_num 1958 * when ports are bonded */ 1959 attr_mask &= ~IB_QP_PORT; 1960 } 1961 } 1962 1963 if ((attr_mask & IB_QP_PORT) && 1964 (attr->port_num == 0 || attr->port_num > dev->num_ports)) { 1965 pr_debug("qpn 0x%x: invalid port number (%d) specified " 1966 "for transition %d to %d. qp_type %d\n", 1967 ibqp->qp_num, attr->port_num, cur_state, 1968 new_state, ibqp->qp_type); 1969 goto out; 1970 } 1971 1972 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) && 1973 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) != 1974 IB_LINK_LAYER_ETHERNET)) 1975 goto out; 1976 1977 if (attr_mask & IB_QP_PKEY_INDEX) { 1978 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 1979 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) { 1980 pr_debug("qpn 0x%x: invalid pkey index (%d) specified " 1981 "for transition %d to %d. qp_type %d\n", 1982 ibqp->qp_num, attr->pkey_index, cur_state, 1983 new_state, ibqp->qp_type); 1984 goto out; 1985 } 1986 } 1987 1988 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC && 1989 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) { 1990 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. " 1991 "Transition %d to %d. qp_type %d\n", 1992 ibqp->qp_num, attr->max_rd_atomic, cur_state, 1993 new_state, ibqp->qp_type); 1994 goto out; 1995 } 1996 1997 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC && 1998 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) { 1999 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. " 2000 "Transition %d to %d. qp_type %d\n", 2001 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state, 2002 new_state, ibqp->qp_type); 2003 goto out; 2004 } 2005 2006 if (cur_state == new_state && cur_state == IB_QPS_RESET) { 2007 err = 0; 2008 goto out; 2009 } 2010 2011 err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state); 2012 2013 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) 2014 attr->port_num = 1; 2015 2016 out: 2017 mutex_unlock(&qp->mutex); 2018 return err; 2019 } 2020 2021 static int vf_get_qp0_qkey(struct mlx4_dev *dev, int qpn, u32 *qkey) 2022 { 2023 int i; 2024 for (i = 0; i < dev->caps.num_ports; i++) { 2025 if (qpn == dev->caps.qp0_proxy[i] || 2026 qpn == dev->caps.qp0_tunnel[i]) { 2027 *qkey = dev->caps.qp0_qkey[i]; 2028 return 0; 2029 } 2030 } 2031 return -EINVAL; 2032 } 2033 2034 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp, 2035 struct ib_send_wr *wr, 2036 void *wqe, unsigned *mlx_seg_len) 2037 { 2038 struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device); 2039 struct ib_device *ib_dev = &mdev->ib_dev; 2040 struct mlx4_wqe_mlx_seg *mlx = wqe; 2041 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx; 2042 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah); 2043 u16 pkey; 2044 u32 qkey; 2045 int send_size; 2046 int header_size; 2047 int spc; 2048 int i; 2049 2050 if (wr->opcode != IB_WR_SEND) 2051 return -EINVAL; 2052 2053 send_size = 0; 2054 2055 for (i = 0; i < wr->num_sge; ++i) 2056 send_size += wr->sg_list[i].length; 2057 2058 /* for proxy-qp0 sends, need to add in size of tunnel header */ 2059 /* for tunnel-qp0 sends, tunnel header is already in s/g list */ 2060 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) 2061 send_size += sizeof (struct mlx4_ib_tunnel_header); 2062 2063 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header); 2064 2065 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) { 2066 sqp->ud_header.lrh.service_level = 2067 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28; 2068 sqp->ud_header.lrh.destination_lid = 2069 cpu_to_be16(ah->av.ib.g_slid & 0x7f); 2070 sqp->ud_header.lrh.source_lid = 2071 cpu_to_be16(ah->av.ib.g_slid & 0x7f); 2072 } 2073 2074 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); 2075 2076 /* force loopback */ 2077 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR); 2078 mlx->rlid = sqp->ud_header.lrh.destination_lid; 2079 2080 sqp->ud_header.lrh.virtual_lane = 0; 2081 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED); 2082 ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey); 2083 sqp->ud_header.bth.pkey = cpu_to_be16(pkey); 2084 if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER) 2085 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn); 2086 else 2087 sqp->ud_header.bth.destination_qpn = 2088 cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]); 2089 2090 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1)); 2091 if (mlx4_is_master(mdev->dev)) { 2092 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey)) 2093 return -EINVAL; 2094 } else { 2095 if (vf_get_qp0_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey)) 2096 return -EINVAL; 2097 } 2098 sqp->ud_header.deth.qkey = cpu_to_be32(qkey); 2099 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn); 2100 2101 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY; 2102 sqp->ud_header.immediate_present = 0; 2103 2104 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf); 2105 2106 /* 2107 * Inline data segments may not cross a 64 byte boundary. If 2108 * our UD header is bigger than the space available up to the 2109 * next 64 byte boundary in the WQE, use two inline data 2110 * segments to hold the UD header. 2111 */ 2112 spc = MLX4_INLINE_ALIGN - 2113 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1)); 2114 if (header_size <= spc) { 2115 inl->byte_count = cpu_to_be32(1 << 31 | header_size); 2116 memcpy(inl + 1, sqp->header_buf, header_size); 2117 i = 1; 2118 } else { 2119 inl->byte_count = cpu_to_be32(1 << 31 | spc); 2120 memcpy(inl + 1, sqp->header_buf, spc); 2121 2122 inl = (void *) (inl + 1) + spc; 2123 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc); 2124 /* 2125 * Need a barrier here to make sure all the data is 2126 * visible before the byte_count field is set. 2127 * Otherwise the HCA prefetcher could grab the 64-byte 2128 * chunk with this inline segment and get a valid (!= 2129 * 0xffffffff) byte count but stale data, and end up 2130 * generating a packet with bad headers. 2131 * 2132 * The first inline segment's byte_count field doesn't 2133 * need a barrier, because it comes after a 2134 * control/MLX segment and therefore is at an offset 2135 * of 16 mod 64. 2136 */ 2137 wmb(); 2138 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc)); 2139 i = 2; 2140 } 2141 2142 *mlx_seg_len = 2143 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16); 2144 return 0; 2145 } 2146 2147 static void mlx4_u64_to_smac(u8 *dst_mac, u64 src_mac) 2148 { 2149 int i; 2150 2151 for (i = ETH_ALEN; i; i--) { 2152 dst_mac[i - 1] = src_mac & 0xff; 2153 src_mac >>= 8; 2154 } 2155 } 2156 2157 static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr, 2158 void *wqe, unsigned *mlx_seg_len) 2159 { 2160 struct ib_device *ib_dev = sqp->qp.ibqp.device; 2161 struct mlx4_wqe_mlx_seg *mlx = wqe; 2162 struct mlx4_wqe_ctrl_seg *ctrl = wqe; 2163 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx; 2164 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah); 2165 union ib_gid sgid; 2166 u16 pkey; 2167 int send_size; 2168 int header_size; 2169 int spc; 2170 int i; 2171 int err = 0; 2172 u16 vlan = 0xffff; 2173 bool is_eth; 2174 bool is_vlan = false; 2175 bool is_grh; 2176 2177 send_size = 0; 2178 for (i = 0; i < wr->num_sge; ++i) 2179 send_size += wr->sg_list[i].length; 2180 2181 is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET; 2182 is_grh = mlx4_ib_ah_grh_present(ah); 2183 if (is_eth) { 2184 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) { 2185 /* When multi-function is enabled, the ib_core gid 2186 * indexes don't necessarily match the hw ones, so 2187 * we must use our own cache */ 2188 err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev, 2189 be32_to_cpu(ah->av.ib.port_pd) >> 24, 2190 ah->av.ib.gid_index, &sgid.raw[0]); 2191 if (err) 2192 return err; 2193 } else { 2194 err = ib_get_cached_gid(ib_dev, 2195 be32_to_cpu(ah->av.ib.port_pd) >> 24, 2196 ah->av.ib.gid_index, &sgid); 2197 if (err) 2198 return err; 2199 } 2200 2201 if (ah->av.eth.vlan != cpu_to_be16(0xffff)) { 2202 vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff; 2203 is_vlan = 1; 2204 } 2205 } 2206 ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header); 2207 2208 if (!is_eth) { 2209 sqp->ud_header.lrh.service_level = 2210 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28; 2211 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid; 2212 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f); 2213 } 2214 2215 if (is_grh) { 2216 sqp->ud_header.grh.traffic_class = 2217 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff; 2218 sqp->ud_header.grh.flow_label = 2219 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff); 2220 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit; 2221 if (is_eth) 2222 memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16); 2223 else { 2224 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) { 2225 /* When multi-function is enabled, the ib_core gid 2226 * indexes don't necessarily match the hw ones, so 2227 * we must use our own cache */ 2228 sqp->ud_header.grh.source_gid.global.subnet_prefix = 2229 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1]. 2230 subnet_prefix; 2231 sqp->ud_header.grh.source_gid.global.interface_id = 2232 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1]. 2233 guid_cache[ah->av.ib.gid_index]; 2234 } else 2235 ib_get_cached_gid(ib_dev, 2236 be32_to_cpu(ah->av.ib.port_pd) >> 24, 2237 ah->av.ib.gid_index, 2238 &sqp->ud_header.grh.source_gid); 2239 } 2240 memcpy(sqp->ud_header.grh.destination_gid.raw, 2241 ah->av.ib.dgid, 16); 2242 } 2243 2244 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE); 2245 2246 if (!is_eth) { 2247 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) | 2248 (sqp->ud_header.lrh.destination_lid == 2249 IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) | 2250 (sqp->ud_header.lrh.service_level << 8)); 2251 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000)) 2252 mlx->flags |= cpu_to_be32(0x1); /* force loopback */ 2253 mlx->rlid = sqp->ud_header.lrh.destination_lid; 2254 } 2255 2256 switch (wr->opcode) { 2257 case IB_WR_SEND: 2258 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY; 2259 sqp->ud_header.immediate_present = 0; 2260 break; 2261 case IB_WR_SEND_WITH_IMM: 2262 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; 2263 sqp->ud_header.immediate_present = 1; 2264 sqp->ud_header.immediate_data = wr->ex.imm_data; 2265 break; 2266 default: 2267 return -EINVAL; 2268 } 2269 2270 if (is_eth) { 2271 struct in6_addr in6; 2272 2273 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13; 2274 2275 mlx->sched_prio = cpu_to_be16(pcp); 2276 2277 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6); 2278 /* FIXME: cache smac value? */ 2279 memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2); 2280 memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4); 2281 memcpy(&in6, sgid.raw, sizeof(in6)); 2282 2283 if (!mlx4_is_mfunc(to_mdev(ib_dev)->dev)) { 2284 u64 mac = atomic64_read(&to_mdev(ib_dev)->iboe.mac[sqp->qp.port - 1]); 2285 u8 smac[ETH_ALEN]; 2286 2287 mlx4_u64_to_smac(smac, mac); 2288 memcpy(sqp->ud_header.eth.smac_h, smac, ETH_ALEN); 2289 } else { 2290 /* use the src mac of the tunnel */ 2291 memcpy(sqp->ud_header.eth.smac_h, ah->av.eth.s_mac, ETH_ALEN); 2292 } 2293 2294 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6)) 2295 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK); 2296 if (!is_vlan) { 2297 sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE); 2298 } else { 2299 sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE); 2300 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp); 2301 } 2302 } else { 2303 sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0; 2304 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE) 2305 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE; 2306 } 2307 sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED); 2308 if (!sqp->qp.ibqp.qp_num) 2309 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey); 2310 else 2311 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey); 2312 sqp->ud_header.bth.pkey = cpu_to_be16(pkey); 2313 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn); 2314 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1)); 2315 sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ? 2316 sqp->qkey : wr->wr.ud.remote_qkey); 2317 sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num); 2318 2319 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf); 2320 2321 if (0) { 2322 pr_err("built UD header of size %d:\n", header_size); 2323 for (i = 0; i < header_size / 4; ++i) { 2324 if (i % 8 == 0) 2325 pr_err(" [%02x] ", i * 4); 2326 pr_cont(" %08x", 2327 be32_to_cpu(((__be32 *) sqp->header_buf)[i])); 2328 if ((i + 1) % 8 == 0) 2329 pr_cont("\n"); 2330 } 2331 pr_err("\n"); 2332 } 2333 2334 /* 2335 * Inline data segments may not cross a 64 byte boundary. If 2336 * our UD header is bigger than the space available up to the 2337 * next 64 byte boundary in the WQE, use two inline data 2338 * segments to hold the UD header. 2339 */ 2340 spc = MLX4_INLINE_ALIGN - 2341 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1)); 2342 if (header_size <= spc) { 2343 inl->byte_count = cpu_to_be32(1 << 31 | header_size); 2344 memcpy(inl + 1, sqp->header_buf, header_size); 2345 i = 1; 2346 } else { 2347 inl->byte_count = cpu_to_be32(1 << 31 | spc); 2348 memcpy(inl + 1, sqp->header_buf, spc); 2349 2350 inl = (void *) (inl + 1) + spc; 2351 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc); 2352 /* 2353 * Need a barrier here to make sure all the data is 2354 * visible before the byte_count field is set. 2355 * Otherwise the HCA prefetcher could grab the 64-byte 2356 * chunk with this inline segment and get a valid (!= 2357 * 0xffffffff) byte count but stale data, and end up 2358 * generating a packet with bad headers. 2359 * 2360 * The first inline segment's byte_count field doesn't 2361 * need a barrier, because it comes after a 2362 * control/MLX segment and therefore is at an offset 2363 * of 16 mod 64. 2364 */ 2365 wmb(); 2366 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc)); 2367 i = 2; 2368 } 2369 2370 *mlx_seg_len = 2371 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16); 2372 return 0; 2373 } 2374 2375 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq) 2376 { 2377 unsigned cur; 2378 struct mlx4_ib_cq *cq; 2379 2380 cur = wq->head - wq->tail; 2381 if (likely(cur + nreq < wq->max_post)) 2382 return 0; 2383 2384 cq = to_mcq(ib_cq); 2385 spin_lock(&cq->lock); 2386 cur = wq->head - wq->tail; 2387 spin_unlock(&cq->lock); 2388 2389 return cur + nreq >= wq->max_post; 2390 } 2391 2392 static __be32 convert_access(int acc) 2393 { 2394 return (acc & IB_ACCESS_REMOTE_ATOMIC ? 2395 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) | 2396 (acc & IB_ACCESS_REMOTE_WRITE ? 2397 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) | 2398 (acc & IB_ACCESS_REMOTE_READ ? 2399 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) | 2400 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) | 2401 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ); 2402 } 2403 2404 static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr) 2405 { 2406 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list); 2407 int i; 2408 2409 for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i) 2410 mfrpl->mapped_page_list[i] = 2411 cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] | 2412 MLX4_MTT_FLAG_PRESENT); 2413 2414 fseg->flags = convert_access(wr->wr.fast_reg.access_flags); 2415 fseg->mem_key = cpu_to_be32(wr->wr.fast_reg.rkey); 2416 fseg->buf_list = cpu_to_be64(mfrpl->map); 2417 fseg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start); 2418 fseg->reg_len = cpu_to_be64(wr->wr.fast_reg.length); 2419 fseg->offset = 0; /* XXX -- is this just for ZBVA? */ 2420 fseg->page_size = cpu_to_be32(wr->wr.fast_reg.page_shift); 2421 fseg->reserved[0] = 0; 2422 fseg->reserved[1] = 0; 2423 } 2424 2425 static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr) 2426 { 2427 bseg->flags1 = 2428 convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) & 2429 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ | 2430 MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE | 2431 MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC); 2432 bseg->flags2 = 0; 2433 if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2) 2434 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2); 2435 if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED) 2436 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED); 2437 bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey); 2438 bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey); 2439 bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr); 2440 bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length); 2441 } 2442 2443 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey) 2444 { 2445 memset(iseg, 0, sizeof(*iseg)); 2446 iseg->mem_key = cpu_to_be32(rkey); 2447 } 2448 2449 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg, 2450 u64 remote_addr, u32 rkey) 2451 { 2452 rseg->raddr = cpu_to_be64(remote_addr); 2453 rseg->rkey = cpu_to_be32(rkey); 2454 rseg->reserved = 0; 2455 } 2456 2457 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr) 2458 { 2459 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) { 2460 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap); 2461 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add); 2462 } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) { 2463 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add); 2464 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask); 2465 } else { 2466 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add); 2467 aseg->compare = 0; 2468 } 2469 2470 } 2471 2472 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg, 2473 struct ib_send_wr *wr) 2474 { 2475 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap); 2476 aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask); 2477 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add); 2478 aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask); 2479 } 2480 2481 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg, 2482 struct ib_send_wr *wr) 2483 { 2484 memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av)); 2485 dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn); 2486 dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey); 2487 dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan; 2488 memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6); 2489 } 2490 2491 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev, 2492 struct mlx4_wqe_datagram_seg *dseg, 2493 struct ib_send_wr *wr, 2494 enum mlx4_ib_qp_type qpt) 2495 { 2496 union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av; 2497 struct mlx4_av sqp_av = {0}; 2498 int port = *((u8 *) &av->ib.port_pd) & 0x3; 2499 2500 /* force loopback */ 2501 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000); 2502 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */ 2503 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel & 2504 cpu_to_be32(0xf0000000); 2505 2506 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av)); 2507 if (qpt == MLX4_IB_QPT_PROXY_GSI) 2508 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]); 2509 else 2510 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp0_tunnel[port - 1]); 2511 /* Use QKEY from the QP context, which is set by master */ 2512 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY); 2513 } 2514 2515 static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len) 2516 { 2517 struct mlx4_wqe_inline_seg *inl = wqe; 2518 struct mlx4_ib_tunnel_header hdr; 2519 struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah); 2520 int spc; 2521 int i; 2522 2523 memcpy(&hdr.av, &ah->av, sizeof hdr.av); 2524 hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn); 2525 hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index); 2526 hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey); 2527 memcpy(hdr.mac, ah->av.eth.mac, 6); 2528 hdr.vlan = ah->av.eth.vlan; 2529 2530 spc = MLX4_INLINE_ALIGN - 2531 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1)); 2532 if (sizeof (hdr) <= spc) { 2533 memcpy(inl + 1, &hdr, sizeof (hdr)); 2534 wmb(); 2535 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr)); 2536 i = 1; 2537 } else { 2538 memcpy(inl + 1, &hdr, spc); 2539 wmb(); 2540 inl->byte_count = cpu_to_be32(1 << 31 | spc); 2541 2542 inl = (void *) (inl + 1) + spc; 2543 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc); 2544 wmb(); 2545 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc)); 2546 i = 2; 2547 } 2548 2549 *mlx_seg_len = 2550 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16); 2551 } 2552 2553 static void set_mlx_icrc_seg(void *dseg) 2554 { 2555 u32 *t = dseg; 2556 struct mlx4_wqe_inline_seg *iseg = dseg; 2557 2558 t[1] = 0; 2559 2560 /* 2561 * Need a barrier here before writing the byte_count field to 2562 * make sure that all the data is visible before the 2563 * byte_count field is set. Otherwise, if the segment begins 2564 * a new cacheline, the HCA prefetcher could grab the 64-byte 2565 * chunk and get a valid (!= * 0xffffffff) byte count but 2566 * stale data, and end up sending the wrong data. 2567 */ 2568 wmb(); 2569 2570 iseg->byte_count = cpu_to_be32((1 << 31) | 4); 2571 } 2572 2573 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg) 2574 { 2575 dseg->lkey = cpu_to_be32(sg->lkey); 2576 dseg->addr = cpu_to_be64(sg->addr); 2577 2578 /* 2579 * Need a barrier here before writing the byte_count field to 2580 * make sure that all the data is visible before the 2581 * byte_count field is set. Otherwise, if the segment begins 2582 * a new cacheline, the HCA prefetcher could grab the 64-byte 2583 * chunk and get a valid (!= * 0xffffffff) byte count but 2584 * stale data, and end up sending the wrong data. 2585 */ 2586 wmb(); 2587 2588 dseg->byte_count = cpu_to_be32(sg->length); 2589 } 2590 2591 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg) 2592 { 2593 dseg->byte_count = cpu_to_be32(sg->length); 2594 dseg->lkey = cpu_to_be32(sg->lkey); 2595 dseg->addr = cpu_to_be64(sg->addr); 2596 } 2597 2598 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr, 2599 struct mlx4_ib_qp *qp, unsigned *lso_seg_len, 2600 __be32 *lso_hdr_sz, __be32 *blh) 2601 { 2602 unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16); 2603 2604 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE)) 2605 *blh = cpu_to_be32(1 << 6); 2606 2607 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) && 2608 wr->num_sge > qp->sq.max_gs - (halign >> 4))) 2609 return -EINVAL; 2610 2611 memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen); 2612 2613 *lso_hdr_sz = cpu_to_be32(wr->wr.ud.mss << 16 | wr->wr.ud.hlen); 2614 *lso_seg_len = halign; 2615 return 0; 2616 } 2617 2618 static __be32 send_ieth(struct ib_send_wr *wr) 2619 { 2620 switch (wr->opcode) { 2621 case IB_WR_SEND_WITH_IMM: 2622 case IB_WR_RDMA_WRITE_WITH_IMM: 2623 return wr->ex.imm_data; 2624 2625 case IB_WR_SEND_WITH_INV: 2626 return cpu_to_be32(wr->ex.invalidate_rkey); 2627 2628 default: 2629 return 0; 2630 } 2631 } 2632 2633 static void add_zero_len_inline(void *wqe) 2634 { 2635 struct mlx4_wqe_inline_seg *inl = wqe; 2636 memset(wqe, 0, 16); 2637 inl->byte_count = cpu_to_be32(1 << 31); 2638 } 2639 2640 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, 2641 struct ib_send_wr **bad_wr) 2642 { 2643 struct mlx4_ib_qp *qp = to_mqp(ibqp); 2644 void *wqe; 2645 struct mlx4_wqe_ctrl_seg *ctrl; 2646 struct mlx4_wqe_data_seg *dseg; 2647 unsigned long flags; 2648 int nreq; 2649 int err = 0; 2650 unsigned ind; 2651 int uninitialized_var(stamp); 2652 int uninitialized_var(size); 2653 unsigned uninitialized_var(seglen); 2654 __be32 dummy; 2655 __be32 *lso_wqe; 2656 __be32 uninitialized_var(lso_hdr_sz); 2657 __be32 blh; 2658 int i; 2659 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device); 2660 2661 spin_lock_irqsave(&qp->sq.lock, flags); 2662 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) { 2663 err = -EIO; 2664 *bad_wr = wr; 2665 nreq = 0; 2666 goto out; 2667 } 2668 2669 ind = qp->sq_next_wqe; 2670 2671 for (nreq = 0; wr; ++nreq, wr = wr->next) { 2672 lso_wqe = &dummy; 2673 blh = 0; 2674 2675 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) { 2676 err = -ENOMEM; 2677 *bad_wr = wr; 2678 goto out; 2679 } 2680 2681 if (unlikely(wr->num_sge > qp->sq.max_gs)) { 2682 err = -EINVAL; 2683 *bad_wr = wr; 2684 goto out; 2685 } 2686 2687 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1)); 2688 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id; 2689 2690 ctrl->srcrb_flags = 2691 (wr->send_flags & IB_SEND_SIGNALED ? 2692 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) | 2693 (wr->send_flags & IB_SEND_SOLICITED ? 2694 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) | 2695 ((wr->send_flags & IB_SEND_IP_CSUM) ? 2696 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM | 2697 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) | 2698 qp->sq_signal_bits; 2699 2700 ctrl->imm = send_ieth(wr); 2701 2702 wqe += sizeof *ctrl; 2703 size = sizeof *ctrl / 16; 2704 2705 switch (qp->mlx4_ib_qp_type) { 2706 case MLX4_IB_QPT_RC: 2707 case MLX4_IB_QPT_UC: 2708 switch (wr->opcode) { 2709 case IB_WR_ATOMIC_CMP_AND_SWP: 2710 case IB_WR_ATOMIC_FETCH_AND_ADD: 2711 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD: 2712 set_raddr_seg(wqe, wr->wr.atomic.remote_addr, 2713 wr->wr.atomic.rkey); 2714 wqe += sizeof (struct mlx4_wqe_raddr_seg); 2715 2716 set_atomic_seg(wqe, wr); 2717 wqe += sizeof (struct mlx4_wqe_atomic_seg); 2718 2719 size += (sizeof (struct mlx4_wqe_raddr_seg) + 2720 sizeof (struct mlx4_wqe_atomic_seg)) / 16; 2721 2722 break; 2723 2724 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP: 2725 set_raddr_seg(wqe, wr->wr.atomic.remote_addr, 2726 wr->wr.atomic.rkey); 2727 wqe += sizeof (struct mlx4_wqe_raddr_seg); 2728 2729 set_masked_atomic_seg(wqe, wr); 2730 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg); 2731 2732 size += (sizeof (struct mlx4_wqe_raddr_seg) + 2733 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16; 2734 2735 break; 2736 2737 case IB_WR_RDMA_READ: 2738 case IB_WR_RDMA_WRITE: 2739 case IB_WR_RDMA_WRITE_WITH_IMM: 2740 set_raddr_seg(wqe, wr->wr.rdma.remote_addr, 2741 wr->wr.rdma.rkey); 2742 wqe += sizeof (struct mlx4_wqe_raddr_seg); 2743 size += sizeof (struct mlx4_wqe_raddr_seg) / 16; 2744 break; 2745 2746 case IB_WR_LOCAL_INV: 2747 ctrl->srcrb_flags |= 2748 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER); 2749 set_local_inv_seg(wqe, wr->ex.invalidate_rkey); 2750 wqe += sizeof (struct mlx4_wqe_local_inval_seg); 2751 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16; 2752 break; 2753 2754 case IB_WR_FAST_REG_MR: 2755 ctrl->srcrb_flags |= 2756 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER); 2757 set_fmr_seg(wqe, wr); 2758 wqe += sizeof (struct mlx4_wqe_fmr_seg); 2759 size += sizeof (struct mlx4_wqe_fmr_seg) / 16; 2760 break; 2761 2762 case IB_WR_BIND_MW: 2763 ctrl->srcrb_flags |= 2764 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER); 2765 set_bind_seg(wqe, wr); 2766 wqe += sizeof(struct mlx4_wqe_bind_seg); 2767 size += sizeof(struct mlx4_wqe_bind_seg) / 16; 2768 break; 2769 default: 2770 /* No extra segments required for sends */ 2771 break; 2772 } 2773 break; 2774 2775 case MLX4_IB_QPT_TUN_SMI_OWNER: 2776 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen); 2777 if (unlikely(err)) { 2778 *bad_wr = wr; 2779 goto out; 2780 } 2781 wqe += seglen; 2782 size += seglen / 16; 2783 break; 2784 case MLX4_IB_QPT_TUN_SMI: 2785 case MLX4_IB_QPT_TUN_GSI: 2786 /* this is a UD qp used in MAD responses to slaves. */ 2787 set_datagram_seg(wqe, wr); 2788 /* set the forced-loopback bit in the data seg av */ 2789 *(__be32 *) wqe |= cpu_to_be32(0x80000000); 2790 wqe += sizeof (struct mlx4_wqe_datagram_seg); 2791 size += sizeof (struct mlx4_wqe_datagram_seg) / 16; 2792 break; 2793 case MLX4_IB_QPT_UD: 2794 set_datagram_seg(wqe, wr); 2795 wqe += sizeof (struct mlx4_wqe_datagram_seg); 2796 size += sizeof (struct mlx4_wqe_datagram_seg) / 16; 2797 2798 if (wr->opcode == IB_WR_LSO) { 2799 err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh); 2800 if (unlikely(err)) { 2801 *bad_wr = wr; 2802 goto out; 2803 } 2804 lso_wqe = (__be32 *) wqe; 2805 wqe += seglen; 2806 size += seglen / 16; 2807 } 2808 break; 2809 2810 case MLX4_IB_QPT_PROXY_SMI_OWNER: 2811 err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen); 2812 if (unlikely(err)) { 2813 *bad_wr = wr; 2814 goto out; 2815 } 2816 wqe += seglen; 2817 size += seglen / 16; 2818 /* to start tunnel header on a cache-line boundary */ 2819 add_zero_len_inline(wqe); 2820 wqe += 16; 2821 size++; 2822 build_tunnel_header(wr, wqe, &seglen); 2823 wqe += seglen; 2824 size += seglen / 16; 2825 break; 2826 case MLX4_IB_QPT_PROXY_SMI: 2827 case MLX4_IB_QPT_PROXY_GSI: 2828 /* If we are tunneling special qps, this is a UD qp. 2829 * In this case we first add a UD segment targeting 2830 * the tunnel qp, and then add a header with address 2831 * information */ 2832 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr, 2833 qp->mlx4_ib_qp_type); 2834 wqe += sizeof (struct mlx4_wqe_datagram_seg); 2835 size += sizeof (struct mlx4_wqe_datagram_seg) / 16; 2836 build_tunnel_header(wr, wqe, &seglen); 2837 wqe += seglen; 2838 size += seglen / 16; 2839 break; 2840 2841 case MLX4_IB_QPT_SMI: 2842 case MLX4_IB_QPT_GSI: 2843 err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen); 2844 if (unlikely(err)) { 2845 *bad_wr = wr; 2846 goto out; 2847 } 2848 wqe += seglen; 2849 size += seglen / 16; 2850 break; 2851 2852 default: 2853 break; 2854 } 2855 2856 /* 2857 * Write data segments in reverse order, so as to 2858 * overwrite cacheline stamp last within each 2859 * cacheline. This avoids issues with WQE 2860 * prefetching. 2861 */ 2862 2863 dseg = wqe; 2864 dseg += wr->num_sge - 1; 2865 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16); 2866 2867 /* Add one more inline data segment for ICRC for MLX sends */ 2868 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI || 2869 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI || 2870 qp->mlx4_ib_qp_type & 2871 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) { 2872 set_mlx_icrc_seg(dseg + 1); 2873 size += sizeof (struct mlx4_wqe_data_seg) / 16; 2874 } 2875 2876 for (i = wr->num_sge - 1; i >= 0; --i, --dseg) 2877 set_data_seg(dseg, wr->sg_list + i); 2878 2879 /* 2880 * Possibly overwrite stamping in cacheline with LSO 2881 * segment only after making sure all data segments 2882 * are written. 2883 */ 2884 wmb(); 2885 *lso_wqe = lso_hdr_sz; 2886 2887 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ? 2888 MLX4_WQE_CTRL_FENCE : 0) | size; 2889 2890 /* 2891 * Make sure descriptor is fully written before 2892 * setting ownership bit (because HW can start 2893 * executing as soon as we do). 2894 */ 2895 wmb(); 2896 2897 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) { 2898 *bad_wr = wr; 2899 err = -EINVAL; 2900 goto out; 2901 } 2902 2903 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] | 2904 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh; 2905 2906 stamp = ind + qp->sq_spare_wqes; 2907 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift); 2908 2909 /* 2910 * We can improve latency by not stamping the last 2911 * send queue WQE until after ringing the doorbell, so 2912 * only stamp here if there are still more WQEs to post. 2913 * 2914 * Same optimization applies to padding with NOP wqe 2915 * in case of WQE shrinking (used to prevent wrap-around 2916 * in the middle of WR). 2917 */ 2918 if (wr->next) { 2919 stamp_send_wqe(qp, stamp, size * 16); 2920 ind = pad_wraparound(qp, ind); 2921 } 2922 } 2923 2924 out: 2925 if (likely(nreq)) { 2926 qp->sq.head += nreq; 2927 2928 /* 2929 * Make sure that descriptors are written before 2930 * doorbell record. 2931 */ 2932 wmb(); 2933 2934 writel(qp->doorbell_qpn, 2935 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL); 2936 2937 /* 2938 * Make sure doorbells don't leak out of SQ spinlock 2939 * and reach the HCA out of order. 2940 */ 2941 mmiowb(); 2942 2943 stamp_send_wqe(qp, stamp, size * 16); 2944 2945 ind = pad_wraparound(qp, ind); 2946 qp->sq_next_wqe = ind; 2947 } 2948 2949 spin_unlock_irqrestore(&qp->sq.lock, flags); 2950 2951 return err; 2952 } 2953 2954 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, 2955 struct ib_recv_wr **bad_wr) 2956 { 2957 struct mlx4_ib_qp *qp = to_mqp(ibqp); 2958 struct mlx4_wqe_data_seg *scat; 2959 unsigned long flags; 2960 int err = 0; 2961 int nreq; 2962 int ind; 2963 int max_gs; 2964 int i; 2965 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device); 2966 2967 max_gs = qp->rq.max_gs; 2968 spin_lock_irqsave(&qp->rq.lock, flags); 2969 2970 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) { 2971 err = -EIO; 2972 *bad_wr = wr; 2973 nreq = 0; 2974 goto out; 2975 } 2976 2977 ind = qp->rq.head & (qp->rq.wqe_cnt - 1); 2978 2979 for (nreq = 0; wr; ++nreq, wr = wr->next) { 2980 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) { 2981 err = -ENOMEM; 2982 *bad_wr = wr; 2983 goto out; 2984 } 2985 2986 if (unlikely(wr->num_sge > qp->rq.max_gs)) { 2987 err = -EINVAL; 2988 *bad_wr = wr; 2989 goto out; 2990 } 2991 2992 scat = get_recv_wqe(qp, ind); 2993 2994 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER | 2995 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) { 2996 ib_dma_sync_single_for_device(ibqp->device, 2997 qp->sqp_proxy_rcv[ind].map, 2998 sizeof (struct mlx4_ib_proxy_sqp_hdr), 2999 DMA_FROM_DEVICE); 3000 scat->byte_count = 3001 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr)); 3002 /* use dma lkey from upper layer entry */ 3003 scat->lkey = cpu_to_be32(wr->sg_list->lkey); 3004 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map); 3005 scat++; 3006 max_gs--; 3007 } 3008 3009 for (i = 0; i < wr->num_sge; ++i) 3010 __set_data_seg(scat + i, wr->sg_list + i); 3011 3012 if (i < max_gs) { 3013 scat[i].byte_count = 0; 3014 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY); 3015 scat[i].addr = 0; 3016 } 3017 3018 qp->rq.wrid[ind] = wr->wr_id; 3019 3020 ind = (ind + 1) & (qp->rq.wqe_cnt - 1); 3021 } 3022 3023 out: 3024 if (likely(nreq)) { 3025 qp->rq.head += nreq; 3026 3027 /* 3028 * Make sure that descriptors are written before 3029 * doorbell record. 3030 */ 3031 wmb(); 3032 3033 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff); 3034 } 3035 3036 spin_unlock_irqrestore(&qp->rq.lock, flags); 3037 3038 return err; 3039 } 3040 3041 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state) 3042 { 3043 switch (mlx4_state) { 3044 case MLX4_QP_STATE_RST: return IB_QPS_RESET; 3045 case MLX4_QP_STATE_INIT: return IB_QPS_INIT; 3046 case MLX4_QP_STATE_RTR: return IB_QPS_RTR; 3047 case MLX4_QP_STATE_RTS: return IB_QPS_RTS; 3048 case MLX4_QP_STATE_SQ_DRAINING: 3049 case MLX4_QP_STATE_SQD: return IB_QPS_SQD; 3050 case MLX4_QP_STATE_SQER: return IB_QPS_SQE; 3051 case MLX4_QP_STATE_ERR: return IB_QPS_ERR; 3052 default: return -1; 3053 } 3054 } 3055 3056 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state) 3057 { 3058 switch (mlx4_mig_state) { 3059 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED; 3060 case MLX4_QP_PM_REARM: return IB_MIG_REARM; 3061 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED; 3062 default: return -1; 3063 } 3064 } 3065 3066 static int to_ib_qp_access_flags(int mlx4_flags) 3067 { 3068 int ib_flags = 0; 3069 3070 if (mlx4_flags & MLX4_QP_BIT_RRE) 3071 ib_flags |= IB_ACCESS_REMOTE_READ; 3072 if (mlx4_flags & MLX4_QP_BIT_RWE) 3073 ib_flags |= IB_ACCESS_REMOTE_WRITE; 3074 if (mlx4_flags & MLX4_QP_BIT_RAE) 3075 ib_flags |= IB_ACCESS_REMOTE_ATOMIC; 3076 3077 return ib_flags; 3078 } 3079 3080 static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr, 3081 struct mlx4_qp_path *path) 3082 { 3083 struct mlx4_dev *dev = ibdev->dev; 3084 int is_eth; 3085 3086 memset(ib_ah_attr, 0, sizeof *ib_ah_attr); 3087 ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1; 3088 3089 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports) 3090 return; 3091 3092 is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) == 3093 IB_LINK_LAYER_ETHERNET; 3094 if (is_eth) 3095 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) | 3096 ((path->sched_queue & 4) << 1); 3097 else 3098 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf; 3099 3100 ib_ah_attr->dlid = be16_to_cpu(path->rlid); 3101 ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f; 3102 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0; 3103 ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0; 3104 if (ib_ah_attr->ah_flags) { 3105 ib_ah_attr->grh.sgid_index = path->mgid_index; 3106 ib_ah_attr->grh.hop_limit = path->hop_limit; 3107 ib_ah_attr->grh.traffic_class = 3108 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff; 3109 ib_ah_attr->grh.flow_label = 3110 be32_to_cpu(path->tclass_flowlabel) & 0xfffff; 3111 memcpy(ib_ah_attr->grh.dgid.raw, 3112 path->rgid, sizeof ib_ah_attr->grh.dgid.raw); 3113 } 3114 } 3115 3116 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask, 3117 struct ib_qp_init_attr *qp_init_attr) 3118 { 3119 struct mlx4_ib_dev *dev = to_mdev(ibqp->device); 3120 struct mlx4_ib_qp *qp = to_mqp(ibqp); 3121 struct mlx4_qp_context context; 3122 int mlx4_state; 3123 int err = 0; 3124 3125 mutex_lock(&qp->mutex); 3126 3127 if (qp->state == IB_QPS_RESET) { 3128 qp_attr->qp_state = IB_QPS_RESET; 3129 goto done; 3130 } 3131 3132 err = mlx4_qp_query(dev->dev, &qp->mqp, &context); 3133 if (err) { 3134 err = -EINVAL; 3135 goto out; 3136 } 3137 3138 mlx4_state = be32_to_cpu(context.flags) >> 28; 3139 3140 qp->state = to_ib_qp_state(mlx4_state); 3141 qp_attr->qp_state = qp->state; 3142 qp_attr->path_mtu = context.mtu_msgmax >> 5; 3143 qp_attr->path_mig_state = 3144 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3); 3145 qp_attr->qkey = be32_to_cpu(context.qkey); 3146 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff; 3147 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff; 3148 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff; 3149 qp_attr->qp_access_flags = 3150 to_ib_qp_access_flags(be32_to_cpu(context.params2)); 3151 3152 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) { 3153 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path); 3154 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path); 3155 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f; 3156 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num; 3157 } 3158 3159 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f; 3160 if (qp_attr->qp_state == IB_QPS_INIT) 3161 qp_attr->port_num = qp->port; 3162 else 3163 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1; 3164 3165 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */ 3166 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING; 3167 3168 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7); 3169 3170 qp_attr->max_dest_rd_atomic = 3171 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7); 3172 qp_attr->min_rnr_timer = 3173 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f; 3174 qp_attr->timeout = context.pri_path.ackto >> 3; 3175 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7; 3176 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7; 3177 qp_attr->alt_timeout = context.alt_path.ackto >> 3; 3178 3179 done: 3180 qp_attr->cur_qp_state = qp_attr->qp_state; 3181 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt; 3182 qp_attr->cap.max_recv_sge = qp->rq.max_gs; 3183 3184 if (!ibqp->uobject) { 3185 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt; 3186 qp_attr->cap.max_send_sge = qp->sq.max_gs; 3187 } else { 3188 qp_attr->cap.max_send_wr = 0; 3189 qp_attr->cap.max_send_sge = 0; 3190 } 3191 3192 /* 3193 * We don't support inline sends for kernel QPs (yet), and we 3194 * don't know what userspace's value should be. 3195 */ 3196 qp_attr->cap.max_inline_data = 0; 3197 3198 qp_init_attr->cap = qp_attr->cap; 3199 3200 qp_init_attr->create_flags = 0; 3201 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) 3202 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK; 3203 3204 if (qp->flags & MLX4_IB_QP_LSO) 3205 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO; 3206 3207 if (qp->flags & MLX4_IB_QP_NETIF) 3208 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP; 3209 3210 qp_init_attr->sq_sig_type = 3211 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ? 3212 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR; 3213 3214 out: 3215 mutex_unlock(&qp->mutex); 3216 return err; 3217 } 3218 3219