kernel/drivers/infiniband/hw/mlx4/qp.c

   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] != -1) {
1543                         context->pri_path.counter_index =
1544                                                 dev->counters[qp->port - 1];
1545                         optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
1546                 } else
1547                         context->pri_path.counter_index = 0xff;
1548
1549                 if (qp->flags & MLX4_IB_QP_NETIF) {
1550                         mlx4_ib_steer_qp_reg(dev, qp, 1);
1551                         steer_qp = 1;
1552                 }
1553         }
1554
1555         if (attr_mask & IB_QP_PKEY_INDEX) {
1556                 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1557                         context->pri_path.disable_pkey_check = 0x40;
1558                 context->pri_path.pkey_index = attr->pkey_index;
1559                 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
1560         }
1561
1562         if (attr_mask & IB_QP_AV) {
1563                 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path,
1564                                   attr_mask & IB_QP_PORT ?
1565                                   attr->port_num : qp->port))
1566                         goto out;
1567
1568                 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
1569                            MLX4_QP_OPTPAR_SCHED_QUEUE);
1570         }
1571
1572         if (attr_mask & IB_QP_TIMEOUT) {
1573                 context->pri_path.ackto |= attr->timeout << 3;
1574                 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
1575         }
1576
1577         if (attr_mask & IB_QP_ALT_PATH) {
1578                 if (attr->alt_port_num == 0 ||
1579                     attr->alt_port_num > dev->dev->caps.num_ports)
1580                         goto out;
1581
1582                 if (attr->alt_pkey_index >=
1583                     dev->dev->caps.pkey_table_len[attr->alt_port_num])
1584                         goto out;
1585
1586                 if (mlx4_set_alt_path(dev, attr, attr_mask, qp,
1587                                       &context->alt_path,
1588                                       attr->alt_port_num))
1589                         goto out;
1590
1591                 context->alt_path.pkey_index = attr->alt_pkey_index;
1592                 context->alt_path.ackto = attr->alt_timeout << 3;
1593                 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
1594         }
1595
1596         pd = get_pd(qp);
1597         get_cqs(qp, &send_cq, &recv_cq);
1598         context->pd       = cpu_to_be32(pd->pdn);
1599         context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
1600         context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
1601         context->params1  = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
1602
1603         /* Set "fast registration enabled" for all kernel QPs */
1604         if (!qp->ibqp.uobject)
1605                 context->params1 |= cpu_to_be32(1 << 11);
1606
1607         if (attr_mask & IB_QP_RNR_RETRY) {
1608                 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1609                 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
1610         }
1611
1612         if (attr_mask & IB_QP_RETRY_CNT) {
1613                 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1614                 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
1615         }
1616
1617         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1618                 if (attr->max_rd_atomic)
1619                         context->params1 |=
1620                                 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1621                 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
1622         }
1623
1624         if (attr_mask & IB_QP_SQ_PSN)
1625                 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1626
1627         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1628                 if (attr->max_dest_rd_atomic)
1629                         context->params2 |=
1630                                 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1631                 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
1632         }
1633
1634         if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
1635                 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
1636                 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
1637         }
1638
1639         if (ibqp->srq)
1640                 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
1641
1642         if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1643                 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1644                 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
1645         }
1646         if (attr_mask & IB_QP_RQ_PSN)
1647                 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1648
1649         /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
1650         if (attr_mask & IB_QP_QKEY) {
1651                 if (qp->mlx4_ib_qp_type &
1652                     (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
1653                         context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1654                 else {
1655                         if (mlx4_is_mfunc(dev->dev) &&
1656                             !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
1657                             (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
1658                             MLX4_RESERVED_QKEY_BASE) {
1659                                 pr_err("Cannot use reserved QKEY"
1660                                        " 0x%x (range 0xffff0000..0xffffffff"
1661                                        " is reserved)\n", attr->qkey);
1662                                 err = -EINVAL;
1663                                 goto out;
1664                         }
1665                         context->qkey = cpu_to_be32(attr->qkey);
1666                 }
1667                 optpar |= MLX4_QP_OPTPAR_Q_KEY;
1668         }
1669
1670         if (ibqp->srq)
1671                 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
1672
1673         if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1674                 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1675
1676         if (cur_state == IB_QPS_INIT &&
1677             new_state == IB_QPS_RTR  &&
1678             (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
1679              ibqp->qp_type == IB_QPT_UD ||
1680              ibqp->qp_type == IB_QPT_RAW_PACKET)) {
1681                 context->pri_path.sched_queue = (qp->port - 1) << 6;
1682                 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
1683                     qp->mlx4_ib_qp_type &
1684                     (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
1685                         context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
1686                         if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
1687                                 context->pri_path.fl = 0x80;
1688                 } else {
1689                         if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1690                                 context->pri_path.fl = 0x80;
1691                         context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
1692                 }
1693                 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
1694                     IB_LINK_LAYER_ETHERNET) {
1695                         if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI ||
1696                             qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI)
1697                                 context->pri_path.feup = 1 << 7; /* don't fsm */
1698                         /* handle smac_index */
1699                         if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD ||
1700                             qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI ||
1701                             qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) {
1702                                 err = handle_eth_ud_smac_index(dev, qp, (u8 *)attr->smac, context);
1703                                 if (err) {
1704                                         err = -EINVAL;
1705                                         goto out;
1706                                 }
1707                                 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
1708                                         dev->qp1_proxy[qp->port - 1] = qp;
1709                         }
1710                 }
1711         }
1712
1713         if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET) {
1714                 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
1715                                         MLX4_IB_LINK_TYPE_ETH;
1716                 if (dev->dev->caps.tunnel_offload_mode ==  MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
1717                         /* set QP to receive both tunneled & non-tunneled packets */
1718                         if (!(context->flags & cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET)))
1719                                 context->srqn = cpu_to_be32(7 << 28);
1720                 }
1721         }
1722
1723         if (ibqp->qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) {
1724                 int is_eth = rdma_port_get_link_layer(
1725                                 &dev->ib_dev, qp->port) ==
1726                                 IB_LINK_LAYER_ETHERNET;
1727                 if (is_eth) {
1728                         context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH;
1729                         optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH;
1730                 }
1731         }
1732
1733
1734         if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD  &&
1735             attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1736                 sqd_event = 1;
1737         else
1738                 sqd_event = 0;
1739
1740         if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1741                 context->rlkey |= (1 << 4);
1742
1743         /*
1744          * Before passing a kernel QP to the HW, make sure that the
1745          * ownership bits of the send queue are set and the SQ
1746          * headroom is stamped so that the hardware doesn't start
1747          * processing stale work requests.
1748          */
1749         if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1750                 struct mlx4_wqe_ctrl_seg *ctrl;
1751                 int i;
1752
1753                 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
1754                         ctrl = get_send_wqe(qp, i);
1755                         ctrl->owner_opcode = cpu_to_be32(1 << 31);
1756                         if (qp->sq_max_wqes_per_wr == 1)
1757                                 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
1758
1759                         stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
1760                 }
1761         }
1762
1763         err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
1764                              to_mlx4_state(new_state), context, optpar,
1765                              sqd_event, &qp->mqp);
1766         if (err)
1767                 goto out;
1768
1769         qp->state = new_state;
1770
1771         if (attr_mask & IB_QP_ACCESS_FLAGS)
1772                 qp->atomic_rd_en = attr->qp_access_flags;
1773         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1774                 qp->resp_depth = attr->max_dest_rd_atomic;
1775         if (attr_mask & IB_QP_PORT) {
1776                 qp->port = attr->port_num;
1777                 update_mcg_macs(dev, qp);
1778         }
1779         if (attr_mask & IB_QP_ALT_PATH)
1780                 qp->alt_port = attr->alt_port_num;
1781
1782         if (is_sqp(dev, qp))
1783                 store_sqp_attrs(to_msqp(qp), attr, attr_mask);
1784
1785         /*
1786          * If we moved QP0 to RTR, bring the IB link up; if we moved
1787          * QP0 to RESET or ERROR, bring the link back down.
1788          */
1789         if (is_qp0(dev, qp)) {
1790                 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
1791                         if (mlx4_INIT_PORT(dev->dev, qp->port))
1792                                 pr_warn("INIT_PORT failed for port %d\n",
1793                                        qp->port);
1794
1795                 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1796                     (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1797                         mlx4_CLOSE_PORT(dev->dev, qp->port);
1798         }
1799
1800         /*
1801          * If we moved a kernel QP to RESET, clean up all old CQ
1802          * entries and reinitialize the QP.
1803          */
1804         if (new_state == IB_QPS_RESET) {
1805                 if (!ibqp->uobject) {
1806                         mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1807                                          ibqp->srq ? to_msrq(ibqp->srq) : NULL);
1808                         if (send_cq != recv_cq)
1809                                 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1810
1811                         qp->rq.head = 0;
1812                         qp->rq.tail = 0;
1813                         qp->sq.head = 0;
1814                         qp->sq.tail = 0;
1815                         qp->sq_next_wqe = 0;
1816                         if (qp->rq.wqe_cnt)
1817                                 *qp->db.db  = 0;
1818
1819                         if (qp->flags & MLX4_IB_QP_NETIF)
1820                                 mlx4_ib_steer_qp_reg(dev, qp, 0);
1821                 }
1822                 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) {
1823                         mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1824                         qp->pri.smac = 0;
1825                         qp->pri.smac_port = 0;
1826                 }
1827                 if (qp->alt.smac) {
1828                         mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1829                         qp->alt.smac = 0;
1830                 }
1831                 if (qp->pri.vid < 0x1000) {
1832                         mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
1833                         qp->pri.vid = 0xFFFF;
1834                         qp->pri.candidate_vid = 0xFFFF;
1835                         qp->pri.update_vid = 0;
1836                 }
1837
1838                 if (qp->alt.vid < 0x1000) {
1839                         mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
1840                         qp->alt.vid = 0xFFFF;
1841                         qp->alt.candidate_vid = 0xFFFF;
1842                         qp->alt.update_vid = 0;
1843                 }
1844         }
1845 out:
1846         if (err && steer_qp)
1847                 mlx4_ib_steer_qp_reg(dev, qp, 0);
1848         kfree(context);
1849         if (qp->pri.candidate_smac ||
1850             (!qp->pri.candidate_smac && qp->pri.candidate_smac_port)) {
1851                 if (err) {
1852                         mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac);
1853                 } else {
1854                         if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port))
1855                                 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1856                         qp->pri.smac = qp->pri.candidate_smac;
1857                         qp->pri.smac_index = qp->pri.candidate_smac_index;
1858                         qp->pri.smac_port = qp->pri.candidate_smac_port;
1859                 }
1860                 qp->pri.candidate_smac = 0;
1861                 qp->pri.candidate_smac_index = 0;
1862                 qp->pri.candidate_smac_port = 0;
1863         }
1864         if (qp->alt.candidate_smac) {
1865                 if (err) {
1866                         mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac);
1867                 } else {
1868                         if (qp->alt.smac)
1869                                 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1870                         qp->alt.smac = qp->alt.candidate_smac;
1871                         qp->alt.smac_index = qp->alt.candidate_smac_index;
1872                         qp->alt.smac_port = qp->alt.candidate_smac_port;
1873                 }
1874                 qp->alt.candidate_smac = 0;
1875                 qp->alt.candidate_smac_index = 0;
1876                 qp->alt.candidate_smac_port = 0;
1877         }
1878
1879         if (qp->pri.update_vid) {
1880                 if (err) {
1881                         if (qp->pri.candidate_vid < 0x1000)
1882                                 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port,
1883                                                      qp->pri.candidate_vid);
1884                 } else {
1885                         if (qp->pri.vid < 0x1000)
1886                                 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port,
1887                                                      qp->pri.vid);
1888                         qp->pri.vid = qp->pri.candidate_vid;
1889                         qp->pri.vlan_port = qp->pri.candidate_vlan_port;
1890                         qp->pri.vlan_index =  qp->pri.candidate_vlan_index;
1891                 }
1892                 qp->pri.candidate_vid = 0xFFFF;
1893                 qp->pri.update_vid = 0;
1894         }
1895
1896         if (qp->alt.update_vid) {
1897                 if (err) {
1898                         if (qp->alt.candidate_vid < 0x1000)
1899                                 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port,
1900                                                      qp->alt.candidate_vid);
1901                 } else {
1902                         if (qp->alt.vid < 0x1000)
1903                                 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port,
1904                                                      qp->alt.vid);
1905                         qp->alt.vid = qp->alt.candidate_vid;
1906                         qp->alt.vlan_port = qp->alt.candidate_vlan_port;
1907                         qp->alt.vlan_index =  qp->alt.candidate_vlan_index;
1908                 }
1909                 qp->alt.candidate_vid = 0xFFFF;
1910                 qp->alt.update_vid = 0;
1911         }
1912
1913         return err;
1914 }
1915
1916 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1917                       int attr_mask, struct ib_udata *udata)
1918 {
1919         struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1920         struct mlx4_ib_qp *qp = to_mqp(ibqp);
1921         enum ib_qp_state cur_state, new_state;
1922         int err = -EINVAL;
1923         int ll;
1924         mutex_lock(&qp->mutex);
1925
1926         cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1927         new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1928
1929         if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1930                 ll = IB_LINK_LAYER_UNSPECIFIED;
1931         } else {
1932                 int port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1933                 ll = rdma_port_get_link_layer(&dev->ib_dev, port);
1934         }
1935
1936         if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
1937                                 attr_mask, ll)) {
1938                 pr_debug("qpn 0x%x: invalid attribute mask specified "
1939                          "for transition %d to %d. qp_type %d,"
1940                          " attr_mask 0x%x\n",
1941                          ibqp->qp_num, cur_state, new_state,
1942                          ibqp->qp_type, attr_mask);
1943                 goto out;
1944         }
1945
1946         if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) {
1947                 if ((cur_state == IB_QPS_RESET) && (new_state == IB_QPS_INIT)) {
1948                         if ((ibqp->qp_type == IB_QPT_RC) ||
1949                             (ibqp->qp_type == IB_QPT_UD) ||
1950                             (ibqp->qp_type == IB_QPT_UC) ||
1951                             (ibqp->qp_type == IB_QPT_RAW_PACKET) ||
1952                             (ibqp->qp_type == IB_QPT_XRC_INI)) {
1953                                 attr->port_num = mlx4_ib_bond_next_port(dev);
1954                         }
1955                 } else {
1956                         /* no sense in changing port_num
1957                          * when ports are bonded */
1958                         attr_mask &= ~IB_QP_PORT;
1959                 }
1960         }
1961
1962         if ((attr_mask & IB_QP_PORT) &&
1963             (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
1964                 pr_debug("qpn 0x%x: invalid port number (%d) specified "
1965                          "for transition %d to %d. qp_type %d\n",
1966                          ibqp->qp_num, attr->port_num, cur_state,
1967                          new_state, ibqp->qp_type);
1968                 goto out;
1969         }
1970
1971         if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
1972             (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
1973              IB_LINK_LAYER_ETHERNET))
1974                 goto out;
1975
1976         if (attr_mask & IB_QP_PKEY_INDEX) {
1977                 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1978                 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
1979                         pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
1980                                  "for transition %d to %d. qp_type %d\n",
1981                                  ibqp->qp_num, attr->pkey_index, cur_state,
1982                                  new_state, ibqp->qp_type);
1983                         goto out;
1984                 }
1985         }
1986
1987         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1988             attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
1989                 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
1990                          "Transition %d to %d. qp_type %d\n",
1991                          ibqp->qp_num, attr->max_rd_atomic, cur_state,
1992                          new_state, ibqp->qp_type);
1993                 goto out;
1994         }
1995
1996         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1997             attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
1998                 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
1999                          "Transition %d to %d. qp_type %d\n",
2000                          ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
2001                          new_state, ibqp->qp_type);
2002                 goto out;
2003         }
2004
2005         if (cur_state == new_state && cur_state == IB_QPS_RESET) {
2006                 err = 0;
2007                 goto out;
2008         }
2009
2010         err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
2011
2012         if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT))
2013                 attr->port_num = 1;
2014
2015 out:
2016         mutex_unlock(&qp->mutex);
2017         return err;
2018 }
2019
2020 static int vf_get_qp0_qkey(struct mlx4_dev *dev, int qpn, u32 *qkey)
2021 {
2022         int i;
2023         for (i = 0; i < dev->caps.num_ports; i++) {
2024                 if (qpn == dev->caps.qp0_proxy[i] ||
2025                     qpn == dev->caps.qp0_tunnel[i]) {
2026                         *qkey = dev->caps.qp0_qkey[i];
2027                         return 0;
2028                 }
2029         }
2030         return -EINVAL;
2031 }
2032
2033 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
2034                                   struct ib_send_wr *wr,
2035                                   void *wqe, unsigned *mlx_seg_len)
2036 {
2037         struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
2038         struct ib_device *ib_dev = &mdev->ib_dev;
2039         struct mlx4_wqe_mlx_seg *mlx = wqe;
2040         struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2041         struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2042         u16 pkey;
2043         u32 qkey;
2044         int send_size;
2045         int header_size;
2046         int spc;
2047         int i;
2048
2049         if (wr->opcode != IB_WR_SEND)
2050                 return -EINVAL;
2051
2052         send_size = 0;
2053
2054         for (i = 0; i < wr->num_sge; ++i)
2055                 send_size += wr->sg_list[i].length;
2056
2057         /* for proxy-qp0 sends, need to add in size of tunnel header */
2058         /* for tunnel-qp0 sends, tunnel header is already in s/g list */
2059         if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
2060                 send_size += sizeof (struct mlx4_ib_tunnel_header);
2061
2062         ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
2063
2064         if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
2065                 sqp->ud_header.lrh.service_level =
2066                         be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2067                 sqp->ud_header.lrh.destination_lid =
2068                         cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2069                 sqp->ud_header.lrh.source_lid =
2070                         cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2071         }
2072
2073         mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2074
2075         /* force loopback */
2076         mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
2077         mlx->rlid = sqp->ud_header.lrh.destination_lid;
2078
2079         sqp->ud_header.lrh.virtual_lane    = 0;
2080         sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
2081         ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
2082         sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2083         if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
2084                 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2085         else
2086                 sqp->ud_header.bth.destination_qpn =
2087                         cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
2088
2089         sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2090         if (mlx4_is_master(mdev->dev)) {
2091                 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2092                         return -EINVAL;
2093         } else {
2094                 if (vf_get_qp0_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2095                         return -EINVAL;
2096         }
2097         sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
2098         sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
2099
2100         sqp->ud_header.bth.opcode        = IB_OPCODE_UD_SEND_ONLY;
2101         sqp->ud_header.immediate_present = 0;
2102
2103         header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2104
2105         /*
2106          * Inline data segments may not cross a 64 byte boundary.  If
2107          * our UD header is bigger than the space available up to the
2108          * next 64 byte boundary in the WQE, use two inline data
2109          * segments to hold the UD header.
2110          */
2111         spc = MLX4_INLINE_ALIGN -
2112               ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2113         if (header_size <= spc) {
2114                 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2115                 memcpy(inl + 1, sqp->header_buf, header_size);
2116                 i = 1;
2117         } else {
2118                 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2119                 memcpy(inl + 1, sqp->header_buf, spc);
2120
2121                 inl = (void *) (inl + 1) + spc;
2122                 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2123                 /*
2124                  * Need a barrier here to make sure all the data is
2125                  * visible before the byte_count field is set.
2126                  * Otherwise the HCA prefetcher could grab the 64-byte
2127                  * chunk with this inline segment and get a valid (!=
2128                  * 0xffffffff) byte count but stale data, and end up
2129                  * generating a packet with bad headers.
2130                  *
2131                  * The first inline segment's byte_count field doesn't
2132                  * need a barrier, because it comes after a
2133                  * control/MLX segment and therefore is at an offset
2134                  * of 16 mod 64.
2135                  */
2136                 wmb();
2137                 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2138                 i = 2;
2139         }
2140
2141         *mlx_seg_len =
2142         ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2143         return 0;
2144 }
2145
2146 static void mlx4_u64_to_smac(u8 *dst_mac, u64 src_mac)
2147 {
2148         int i;
2149
2150         for (i = ETH_ALEN; i; i--) {
2151                 dst_mac[i - 1] = src_mac & 0xff;
2152                 src_mac >>= 8;
2153         }
2154 }
2155
2156 static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
2157                             void *wqe, unsigned *mlx_seg_len)
2158 {
2159         struct ib_device *ib_dev = sqp->qp.ibqp.device;
2160         struct mlx4_wqe_mlx_seg *mlx = wqe;
2161         struct mlx4_wqe_ctrl_seg *ctrl = wqe;
2162         struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2163         struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2164         union ib_gid sgid;
2165         u16 pkey;
2166         int send_size;
2167         int header_size;
2168         int spc;
2169         int i;
2170         int err = 0;
2171         u16 vlan = 0xffff;
2172         bool is_eth;
2173         bool is_vlan = false;
2174         bool is_grh;
2175
2176         send_size = 0;
2177         for (i = 0; i < wr->num_sge; ++i)
2178                 send_size += wr->sg_list[i].length;
2179
2180         is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
2181         is_grh = mlx4_ib_ah_grh_present(ah);
2182         if (is_eth) {
2183                 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2184                         /* When multi-function is enabled, the ib_core gid
2185                          * indexes don't necessarily match the hw ones, so
2186                          * we must use our own cache */
2187                         err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev,
2188                                                            be32_to_cpu(ah->av.ib.port_pd) >> 24,
2189                                                            ah->av.ib.gid_index, &sgid.raw[0]);
2190                         if (err)
2191                                 return err;
2192                 } else  {
2193                         err = ib_get_cached_gid(ib_dev,
2194                                                 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2195                                                 ah->av.ib.gid_index, &sgid);
2196                         if (err)
2197                                 return err;
2198                 }
2199
2200                 if (ah->av.eth.vlan != cpu_to_be16(0xffff)) {
2201                         vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff;
2202                         is_vlan = 1;
2203                 }
2204         }
2205         ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
2206
2207         if (!is_eth) {
2208                 sqp->ud_header.lrh.service_level =
2209                         be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2210                 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
2211                 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2212         }
2213
2214         if (is_grh) {
2215                 sqp->ud_header.grh.traffic_class =
2216                         (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
2217                 sqp->ud_header.grh.flow_label    =
2218                         ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
2219                 sqp->ud_header.grh.hop_limit     = ah->av.ib.hop_limit;
2220                 if (is_eth)
2221                         memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16);
2222                 else {
2223                 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2224                         /* When multi-function is enabled, the ib_core gid
2225                          * indexes don't necessarily match the hw ones, so
2226                          * we must use our own cache */
2227                         sqp->ud_header.grh.source_gid.global.subnet_prefix =
2228                                 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2229                                                        subnet_prefix;
2230                         sqp->ud_header.grh.source_gid.global.interface_id =
2231                                 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2232                                                guid_cache[ah->av.ib.gid_index];
2233                 } else
2234                         ib_get_cached_gid(ib_dev,
2235                                           be32_to_cpu(ah->av.ib.port_pd) >> 24,
2236                                           ah->av.ib.gid_index,
2237                                           &sqp->ud_header.grh.source_gid);
2238                 }
2239                 memcpy(sqp->ud_header.grh.destination_gid.raw,
2240                        ah->av.ib.dgid, 16);
2241         }
2242
2243         mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2244
2245         if (!is_eth) {
2246                 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
2247                                           (sqp->ud_header.lrh.destination_lid ==
2248                                            IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
2249                                           (sqp->ud_header.lrh.service_level << 8));
2250                 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
2251                         mlx->flags |= cpu_to_be32(0x1); /* force loopback */
2252                 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2253         }
2254
2255         switch (wr->opcode) {
2256         case IB_WR_SEND:
2257                 sqp->ud_header.bth.opcode        = IB_OPCODE_UD_SEND_ONLY;
2258                 sqp->ud_header.immediate_present = 0;
2259                 break;
2260         case IB_WR_SEND_WITH_IMM:
2261                 sqp->ud_header.bth.opcode        = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
2262                 sqp->ud_header.immediate_present = 1;
2263                 sqp->ud_header.immediate_data    = wr->ex.imm_data;
2264                 break;
2265         default:
2266                 return -EINVAL;
2267         }
2268
2269         if (is_eth) {
2270                 struct in6_addr in6;
2271
2272                 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
2273
2274                 mlx->sched_prio = cpu_to_be16(pcp);
2275
2276                 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
2277                 /* FIXME: cache smac value? */
2278                 memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2);
2279                 memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4);
2280                 memcpy(&in6, sgid.raw, sizeof(in6));
2281
2282                 if (!mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2283                         u64 mac = atomic64_read(&to_mdev(ib_dev)->iboe.mac[sqp->qp.port - 1]);
2284                         u8 smac[ETH_ALEN];
2285
2286                         mlx4_u64_to_smac(smac, mac);
2287                         memcpy(sqp->ud_header.eth.smac_h, smac, ETH_ALEN);
2288                 } else {
2289                         /* use the src mac of the tunnel */
2290                         memcpy(sqp->ud_header.eth.smac_h, ah->av.eth.s_mac, ETH_ALEN);
2291                 }
2292
2293                 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
2294                         mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
2295                 if (!is_vlan) {
2296                         sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2297                 } else {
2298                         sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2299                         sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
2300                 }
2301         } else {
2302                 sqp->ud_header.lrh.virtual_lane    = !sqp->qp.ibqp.qp_num ? 15 : 0;
2303                 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
2304                         sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
2305         }
2306         sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
2307         if (!sqp->qp.ibqp.qp_num)
2308                 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
2309         else
2310                 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
2311         sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2312         sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2313         sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2314         sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
2315                                                sqp->qkey : wr->wr.ud.remote_qkey);
2316         sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
2317
2318         header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2319
2320         if (0) {
2321                 pr_err("built UD header of size %d:\n", header_size);
2322                 for (i = 0; i < header_size / 4; ++i) {
2323                         if (i % 8 == 0)
2324                                 pr_err("  [%02x] ", i * 4);
2325                         pr_cont(" %08x",
2326                                 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
2327                         if ((i + 1) % 8 == 0)
2328                                 pr_cont("\n");
2329                 }
2330                 pr_err("\n");
2331         }
2332
2333         /*
2334          * Inline data segments may not cross a 64 byte boundary.  If
2335          * our UD header is bigger than the space available up to the
2336          * next 64 byte boundary in the WQE, use two inline data
2337          * segments to hold the UD header.
2338          */
2339         spc = MLX4_INLINE_ALIGN -
2340                 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2341         if (header_size <= spc) {
2342                 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2343                 memcpy(inl + 1, sqp->header_buf, header_size);
2344                 i = 1;
2345         } else {
2346                 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2347                 memcpy(inl + 1, sqp->header_buf, spc);
2348
2349                 inl = (void *) (inl + 1) + spc;
2350                 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2351                 /*
2352                  * Need a barrier here to make sure all the data is
2353                  * visible before the byte_count field is set.
2354                  * Otherwise the HCA prefetcher could grab the 64-byte
2355                  * chunk with this inline segment and get a valid (!=
2356                  * 0xffffffff) byte count but stale data, and end up
2357                  * generating a packet with bad headers.
2358                  *
2359                  * The first inline segment's byte_count field doesn't
2360                  * need a barrier, because it comes after a
2361                  * control/MLX segment and therefore is at an offset
2362                  * of 16 mod 64.
2363                  */
2364                 wmb();
2365                 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2366                 i = 2;
2367         }
2368
2369         *mlx_seg_len =
2370                 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2371         return 0;
2372 }
2373
2374 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
2375 {
2376         unsigned cur;
2377         struct mlx4_ib_cq *cq;
2378
2379         cur = wq->head - wq->tail;
2380         if (likely(cur + nreq < wq->max_post))
2381                 return 0;
2382
2383         cq = to_mcq(ib_cq);
2384         spin_lock(&cq->lock);
2385         cur = wq->head - wq->tail;
2386         spin_unlock(&cq->lock);
2387
2388         return cur + nreq >= wq->max_post;
2389 }
2390
2391 static __be32 convert_access(int acc)
2392 {
2393         return (acc & IB_ACCESS_REMOTE_ATOMIC ?
2394                 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC)       : 0) |
2395                (acc & IB_ACCESS_REMOTE_WRITE  ?
2396                 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
2397                (acc & IB_ACCESS_REMOTE_READ   ?
2398                 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ)  : 0) |
2399                (acc & IB_ACCESS_LOCAL_WRITE   ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE)  : 0) |
2400                 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
2401 }
2402
2403 static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
2404 {
2405         struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
2406         int i;
2407
2408         for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i)
2409                 mfrpl->mapped_page_list[i] =
2410                         cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] |
2411                                     MLX4_MTT_FLAG_PRESENT);
2412
2413         fseg->flags             = convert_access(wr->wr.fast_reg.access_flags);
2414         fseg->mem_key           = cpu_to_be32(wr->wr.fast_reg.rkey);
2415         fseg->buf_list          = cpu_to_be64(mfrpl->map);
2416         fseg->start_addr        = cpu_to_be64(wr->wr.fast_reg.iova_start);
2417         fseg->reg_len           = cpu_to_be64(wr->wr.fast_reg.length);
2418         fseg->offset            = 0; /* XXX -- is this just for ZBVA? */
2419         fseg->page_size         = cpu_to_be32(wr->wr.fast_reg.page_shift);
2420         fseg->reserved[0]       = 0;
2421         fseg->reserved[1]       = 0;
2422 }
2423
2424 static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
2425 {
2426         bseg->flags1 =
2427                 convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
2428                 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ  |
2429                             MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
2430                             MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
2431         bseg->flags2 = 0;
2432         if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
2433                 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
2434         if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
2435                 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
2436         bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
2437         bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
2438         bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
2439         bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
2440 }
2441
2442 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
2443 {
2444         memset(iseg, 0, sizeof(*iseg));
2445         iseg->mem_key = cpu_to_be32(rkey);
2446 }
2447
2448 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
2449                                           u64 remote_addr, u32 rkey)
2450 {
2451         rseg->raddr    = cpu_to_be64(remote_addr);
2452         rseg->rkey     = cpu_to_be32(rkey);
2453         rseg->reserved = 0;
2454 }
2455
2456 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
2457 {
2458         if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
2459                 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2460                 aseg->compare  = cpu_to_be64(wr->wr.atomic.compare_add);
2461         } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
2462                 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2463                 aseg->compare  = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2464         } else {
2465                 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2466                 aseg->compare  = 0;
2467         }
2468
2469 }
2470
2471 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
2472                                   struct ib_send_wr *wr)
2473 {
2474         aseg->swap_add          = cpu_to_be64(wr->wr.atomic.swap);
2475         aseg->swap_add_mask     = cpu_to_be64(wr->wr.atomic.swap_mask);
2476         aseg->compare           = cpu_to_be64(wr->wr.atomic.compare_add);
2477         aseg->compare_mask      = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2478 }
2479
2480 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
2481                              struct ib_send_wr *wr)
2482 {
2483         memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
2484         dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2485         dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2486         dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
2487         memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
2488 }
2489
2490 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
2491                                     struct mlx4_wqe_datagram_seg *dseg,
2492                                     struct ib_send_wr *wr,
2493                                     enum mlx4_ib_qp_type qpt)
2494 {
2495         union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av;
2496         struct mlx4_av sqp_av = {0};
2497         int port = *((u8 *) &av->ib.port_pd) & 0x3;
2498
2499         /* force loopback */
2500         sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
2501         sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
2502         sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
2503                         cpu_to_be32(0xf0000000);
2504
2505         memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
2506         if (qpt == MLX4_IB_QPT_PROXY_GSI)
2507                 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
2508         else
2509                 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp0_tunnel[port - 1]);
2510         /* Use QKEY from the QP context, which is set by master */
2511         dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
2512 }
2513
2514 static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len)
2515 {
2516         struct mlx4_wqe_inline_seg *inl = wqe;
2517         struct mlx4_ib_tunnel_header hdr;
2518         struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2519         int spc;
2520         int i;
2521
2522         memcpy(&hdr.av, &ah->av, sizeof hdr.av);
2523         hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2524         hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index);
2525         hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2526         memcpy(hdr.mac, ah->av.eth.mac, 6);
2527         hdr.vlan = ah->av.eth.vlan;
2528
2529         spc = MLX4_INLINE_ALIGN -
2530                 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2531         if (sizeof (hdr) <= spc) {
2532                 memcpy(inl + 1, &hdr, sizeof (hdr));
2533                 wmb();
2534                 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
2535                 i = 1;
2536         } else {
2537                 memcpy(inl + 1, &hdr, spc);
2538                 wmb();
2539                 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2540
2541                 inl = (void *) (inl + 1) + spc;
2542                 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
2543                 wmb();
2544                 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
2545                 i = 2;
2546         }
2547
2548         *mlx_seg_len =
2549                 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
2550 }
2551
2552 static void set_mlx_icrc_seg(void *dseg)
2553 {
2554         u32 *t = dseg;
2555         struct mlx4_wqe_inline_seg *iseg = dseg;
2556
2557         t[1] = 0;
2558
2559         /*
2560          * Need a barrier here before writing the byte_count field to
2561          * make sure that all the data is visible before the
2562          * byte_count field is set.  Otherwise, if the segment begins
2563          * a new cacheline, the HCA prefetcher could grab the 64-byte
2564          * chunk and get a valid (!= * 0xffffffff) byte count but
2565          * stale data, and end up sending the wrong data.
2566          */
2567         wmb();
2568
2569         iseg->byte_count = cpu_to_be32((1 << 31) | 4);
2570 }
2571
2572 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2573 {
2574         dseg->lkey       = cpu_to_be32(sg->lkey);
2575         dseg->addr       = cpu_to_be64(sg->addr);
2576
2577         /*
2578          * Need a barrier here before writing the byte_count field to
2579          * make sure that all the data is visible before the
2580          * byte_count field is set.  Otherwise, if the segment begins
2581          * a new cacheline, the HCA prefetcher could grab the 64-byte
2582          * chunk and get a valid (!= * 0xffffffff) byte count but
2583          * stale data, and end up sending the wrong data.
2584          */
2585         wmb();
2586
2587         dseg->byte_count = cpu_to_be32(sg->length);
2588 }
2589
2590 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2591 {
2592         dseg->byte_count = cpu_to_be32(sg->length);
2593         dseg->lkey       = cpu_to_be32(sg->lkey);
2594         dseg->addr       = cpu_to_be64(sg->addr);
2595 }
2596
2597 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
2598                          struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
2599                          __be32 *lso_hdr_sz, __be32 *blh)
2600 {
2601         unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16);
2602
2603         if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
2604                 *blh = cpu_to_be32(1 << 6);
2605
2606         if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
2607                      wr->num_sge > qp->sq.max_gs - (halign >> 4)))
2608                 return -EINVAL;
2609
2610         memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
2611
2612         *lso_hdr_sz  = cpu_to_be32(wr->wr.ud.mss << 16 | wr->wr.ud.hlen);
2613         *lso_seg_len = halign;
2614         return 0;
2615 }
2616
2617 static __be32 send_ieth(struct ib_send_wr *wr)
2618 {
2619         switch (wr->opcode) {
2620         case IB_WR_SEND_WITH_IMM:
2621         case IB_WR_RDMA_WRITE_WITH_IMM:
2622                 return wr->ex.imm_data;
2623
2624         case IB_WR_SEND_WITH_INV:
2625                 return cpu_to_be32(wr->ex.invalidate_rkey);
2626
2627         default:
2628                 return 0;
2629         }
2630 }
2631
2632 static void add_zero_len_inline(void *wqe)
2633 {
2634         struct mlx4_wqe_inline_seg *inl = wqe;
2635         memset(wqe, 0, 16);
2636         inl->byte_count = cpu_to_be32(1 << 31);
2637 }
2638
2639 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2640                       struct ib_send_wr **bad_wr)
2641 {
2642         struct mlx4_ib_qp *qp = to_mqp(ibqp);
2643         void *wqe;
2644         struct mlx4_wqe_ctrl_seg *ctrl;
2645         struct mlx4_wqe_data_seg *dseg;
2646         unsigned long flags;
2647         int nreq;
2648         int err = 0;
2649         unsigned ind;
2650         int uninitialized_var(stamp);
2651         int uninitialized_var(size);
2652         unsigned uninitialized_var(seglen);
2653         __be32 dummy;
2654         __be32 *lso_wqe;
2655         __be32 uninitialized_var(lso_hdr_sz);
2656         __be32 blh;
2657         int i;
2658         struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
2659
2660         spin_lock_irqsave(&qp->sq.lock, flags);
2661         if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
2662                 err = -EIO;
2663                 *bad_wr = wr;
2664                 nreq = 0;
2665                 goto out;
2666         }
2667
2668         ind = qp->sq_next_wqe;
2669
2670         for (nreq = 0; wr; ++nreq, wr = wr->next) {
2671                 lso_wqe = &dummy;
2672                 blh = 0;
2673
2674                 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
2675                         err = -ENOMEM;
2676                         *bad_wr = wr;
2677                         goto out;
2678                 }
2679
2680                 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
2681                         err = -EINVAL;
2682                         *bad_wr = wr;
2683                         goto out;
2684                 }
2685
2686                 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
2687                 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
2688
2689                 ctrl->srcrb_flags =
2690                         (wr->send_flags & IB_SEND_SIGNALED ?
2691                          cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
2692                         (wr->send_flags & IB_SEND_SOLICITED ?
2693                          cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
2694                         ((wr->send_flags & IB_SEND_IP_CSUM) ?
2695                          cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
2696                                      MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
2697                         qp->sq_signal_bits;
2698
2699                 ctrl->imm = send_ieth(wr);
2700
2701                 wqe += sizeof *ctrl;
2702                 size = sizeof *ctrl / 16;
2703
2704                 switch (qp->mlx4_ib_qp_type) {
2705                 case MLX4_IB_QPT_RC:
2706                 case MLX4_IB_QPT_UC:
2707                         switch (wr->opcode) {
2708                         case IB_WR_ATOMIC_CMP_AND_SWP:
2709                         case IB_WR_ATOMIC_FETCH_AND_ADD:
2710                         case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
2711                                 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2712                                               wr->wr.atomic.rkey);
2713                                 wqe  += sizeof (struct mlx4_wqe_raddr_seg);
2714
2715                                 set_atomic_seg(wqe, wr);
2716                                 wqe  += sizeof (struct mlx4_wqe_atomic_seg);
2717
2718                                 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2719                                          sizeof (struct mlx4_wqe_atomic_seg)) / 16;
2720
2721                                 break;
2722
2723                         case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2724                                 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2725                                               wr->wr.atomic.rkey);
2726                                 wqe  += sizeof (struct mlx4_wqe_raddr_seg);
2727
2728                                 set_masked_atomic_seg(wqe, wr);
2729                                 wqe  += sizeof (struct mlx4_wqe_masked_atomic_seg);
2730
2731                                 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2732                                          sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
2733
2734                                 break;
2735
2736                         case IB_WR_RDMA_READ:
2737                         case IB_WR_RDMA_WRITE:
2738                         case IB_WR_RDMA_WRITE_WITH_IMM:
2739                                 set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
2740                                               wr->wr.rdma.rkey);
2741                                 wqe  += sizeof (struct mlx4_wqe_raddr_seg);
2742                                 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
2743                                 break;
2744
2745                         case IB_WR_LOCAL_INV:
2746                                 ctrl->srcrb_flags |=
2747                                         cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2748                                 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
2749                                 wqe  += sizeof (struct mlx4_wqe_local_inval_seg);
2750                                 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
2751                                 break;
2752
2753                         case IB_WR_FAST_REG_MR:
2754                                 ctrl->srcrb_flags |=
2755                                         cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2756                                 set_fmr_seg(wqe, wr);
2757                                 wqe  += sizeof (struct mlx4_wqe_fmr_seg);
2758                                 size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
2759                                 break;
2760
2761                         case IB_WR_BIND_MW:
2762                                 ctrl->srcrb_flags |=
2763                                         cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2764                                 set_bind_seg(wqe, wr);
2765                                 wqe  += sizeof(struct mlx4_wqe_bind_seg);
2766                                 size += sizeof(struct mlx4_wqe_bind_seg) / 16;
2767                                 break;
2768                         default:
2769                                 /* No extra segments required for sends */
2770                                 break;
2771                         }
2772                         break;
2773
2774                 case MLX4_IB_QPT_TUN_SMI_OWNER:
2775                         err =  build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2776                         if (unlikely(err)) {
2777                                 *bad_wr = wr;
2778                                 goto out;
2779                         }
2780                         wqe  += seglen;
2781                         size += seglen / 16;
2782                         break;
2783                 case MLX4_IB_QPT_TUN_SMI:
2784                 case MLX4_IB_QPT_TUN_GSI:
2785                         /* this is a UD qp used in MAD responses to slaves. */
2786                         set_datagram_seg(wqe, wr);
2787                         /* set the forced-loopback bit in the data seg av */
2788                         *(__be32 *) wqe |= cpu_to_be32(0x80000000);
2789                         wqe  += sizeof (struct mlx4_wqe_datagram_seg);
2790                         size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2791                         break;
2792                 case MLX4_IB_QPT_UD:
2793                         set_datagram_seg(wqe, wr);
2794                         wqe  += sizeof (struct mlx4_wqe_datagram_seg);
2795                         size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2796
2797                         if (wr->opcode == IB_WR_LSO) {
2798                                 err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh);
2799                                 if (unlikely(err)) {
2800                                         *bad_wr = wr;
2801                                         goto out;
2802                                 }
2803                                 lso_wqe = (__be32 *) wqe;
2804                                 wqe  += seglen;
2805                                 size += seglen / 16;
2806                         }
2807                         break;
2808
2809                 case MLX4_IB_QPT_PROXY_SMI_OWNER:
2810                         err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2811                         if (unlikely(err)) {
2812                                 *bad_wr = wr;
2813                                 goto out;
2814                         }
2815                         wqe  += seglen;
2816                         size += seglen / 16;
2817                         /* to start tunnel header on a cache-line boundary */
2818                         add_zero_len_inline(wqe);
2819                         wqe += 16;
2820                         size++;
2821                         build_tunnel_header(wr, wqe, &seglen);
2822                         wqe  += seglen;
2823                         size += seglen / 16;
2824                         break;
2825                 case MLX4_IB_QPT_PROXY_SMI:
2826                 case MLX4_IB_QPT_PROXY_GSI:
2827                         /* If we are tunneling special qps, this is a UD qp.
2828                          * In this case we first add a UD segment targeting
2829                          * the tunnel qp, and then add a header with address
2830                          * information */
2831                         set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr,
2832                                                 qp->mlx4_ib_qp_type);
2833                         wqe  += sizeof (struct mlx4_wqe_datagram_seg);
2834                         size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2835                         build_tunnel_header(wr, wqe, &seglen);
2836                         wqe  += seglen;
2837                         size += seglen / 16;
2838                         break;
2839
2840                 case MLX4_IB_QPT_SMI:
2841                 case MLX4_IB_QPT_GSI:
2842                         err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen);
2843                         if (unlikely(err)) {
2844                                 *bad_wr = wr;
2845                                 goto out;
2846                         }
2847                         wqe  += seglen;
2848                         size += seglen / 16;
2849                         break;
2850
2851                 default:
2852                         break;
2853                 }
2854
2855                 /*
2856                  * Write data segments in reverse order, so as to
2857                  * overwrite cacheline stamp last within each
2858                  * cacheline.  This avoids issues with WQE
2859                  * prefetching.
2860                  */
2861
2862                 dseg = wqe;
2863                 dseg += wr->num_sge - 1;
2864                 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
2865
2866                 /* Add one more inline data segment for ICRC for MLX sends */
2867                 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2868                              qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
2869                              qp->mlx4_ib_qp_type &
2870                              (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
2871                         set_mlx_icrc_seg(dseg + 1);
2872                         size += sizeof (struct mlx4_wqe_data_seg) / 16;
2873                 }
2874
2875                 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
2876                         set_data_seg(dseg, wr->sg_list + i);
2877
2878                 /*
2879                  * Possibly overwrite stamping in cacheline with LSO
2880                  * segment only after making sure all data segments
2881                  * are written.
2882                  */
2883                 wmb();
2884                 *lso_wqe = lso_hdr_sz;
2885
2886                 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
2887                                     MLX4_WQE_CTRL_FENCE : 0) | size;
2888
2889                 /*
2890                  * Make sure descriptor is fully written before
2891                  * setting ownership bit (because HW can start
2892                  * executing as soon as we do).
2893                  */
2894                 wmb();
2895
2896                 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
2897                         *bad_wr = wr;
2898                         err = -EINVAL;
2899                         goto out;
2900                 }
2901
2902                 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
2903                         (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
2904
2905                 stamp = ind + qp->sq_spare_wqes;
2906                 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
2907
2908                 /*
2909                  * We can improve latency by not stamping the last
2910                  * send queue WQE until after ringing the doorbell, so
2911                  * only stamp here if there are still more WQEs to post.
2912                  *
2913                  * Same optimization applies to padding with NOP wqe
2914                  * in case of WQE shrinking (used to prevent wrap-around
2915                  * in the middle of WR).
2916                  */
2917                 if (wr->next) {
2918                         stamp_send_wqe(qp, stamp, size * 16);
2919                         ind = pad_wraparound(qp, ind);
2920                 }
2921         }
2922
2923 out:
2924         if (likely(nreq)) {
2925                 qp->sq.head += nreq;
2926
2927                 /*
2928                  * Make sure that descriptors are written before
2929                  * doorbell record.
2930                  */
2931                 wmb();
2932
2933                 writel(qp->doorbell_qpn,
2934                        to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
2935
2936                 /*
2937                  * Make sure doorbells don't leak out of SQ spinlock
2938                  * and reach the HCA out of order.
2939                  */
2940                 mmiowb();
2941
2942                 stamp_send_wqe(qp, stamp, size * 16);
2943
2944                 ind = pad_wraparound(qp, ind);
2945                 qp->sq_next_wqe = ind;
2946         }
2947
2948         spin_unlock_irqrestore(&qp->sq.lock, flags);
2949
2950         return err;
2951 }
2952
2953 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2954                       struct ib_recv_wr **bad_wr)
2955 {
2956         struct mlx4_ib_qp *qp = to_mqp(ibqp);
2957         struct mlx4_wqe_data_seg *scat;
2958         unsigned long flags;
2959         int err = 0;
2960         int nreq;
2961         int ind;
2962         int max_gs;
2963         int i;
2964         struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
2965
2966         max_gs = qp->rq.max_gs;
2967         spin_lock_irqsave(&qp->rq.lock, flags);
2968
2969         if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
2970                 err = -EIO;
2971                 *bad_wr = wr;
2972                 nreq = 0;
2973                 goto out;
2974         }
2975
2976         ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2977
2978         for (nreq = 0; wr; ++nreq, wr = wr->next) {
2979                 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2980                         err = -ENOMEM;
2981                         *bad_wr = wr;
2982                         goto out;
2983                 }
2984
2985                 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2986                         err = -EINVAL;
2987                         *bad_wr = wr;
2988                         goto out;
2989                 }
2990
2991                 scat = get_recv_wqe(qp, ind);
2992
2993                 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
2994                     MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
2995                         ib_dma_sync_single_for_device(ibqp->device,
2996                                                       qp->sqp_proxy_rcv[ind].map,
2997                                                       sizeof (struct mlx4_ib_proxy_sqp_hdr),
2998                                                       DMA_FROM_DEVICE);
2999                         scat->byte_count =
3000                                 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
3001                         /* use dma lkey from upper layer entry */
3002                         scat->lkey = cpu_to_be32(wr->sg_list->lkey);
3003                         scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
3004                         scat++;
3005                         max_gs--;
3006                 }
3007
3008                 for (i = 0; i < wr->num_sge; ++i)
3009                         __set_data_seg(scat + i, wr->sg_list + i);
3010
3011                 if (i < max_gs) {
3012                         scat[i].byte_count = 0;
3013                         scat[i].lkey       = cpu_to_be32(MLX4_INVALID_LKEY);
3014                         scat[i].addr       = 0;
3015                 }
3016
3017                 qp->rq.wrid[ind] = wr->wr_id;
3018
3019                 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
3020         }
3021
3022 out:
3023         if (likely(nreq)) {
3024                 qp->rq.head += nreq;
3025
3026                 /*
3027                  * Make sure that descriptors are written before
3028                  * doorbell record.
3029                  */
3030                 wmb();
3031
3032                 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
3033         }
3034
3035         spin_unlock_irqrestore(&qp->rq.lock, flags);
3036
3037         return err;
3038 }
3039
3040 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
3041 {
3042         switch (mlx4_state) {
3043         case MLX4_QP_STATE_RST:      return IB_QPS_RESET;
3044         case MLX4_QP_STATE_INIT:     return IB_QPS_INIT;
3045         case MLX4_QP_STATE_RTR:      return IB_QPS_RTR;
3046         case MLX4_QP_STATE_RTS:      return IB_QPS_RTS;
3047         case MLX4_QP_STATE_SQ_DRAINING:
3048         case MLX4_QP_STATE_SQD:      return IB_QPS_SQD;
3049         case MLX4_QP_STATE_SQER:     return IB_QPS_SQE;
3050         case MLX4_QP_STATE_ERR:      return IB_QPS_ERR;
3051         default:                     return -1;
3052         }
3053 }
3054
3055 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
3056 {
3057         switch (mlx4_mig_state) {
3058         case MLX4_QP_PM_ARMED:          return IB_MIG_ARMED;
3059         case MLX4_QP_PM_REARM:          return IB_MIG_REARM;
3060         case MLX4_QP_PM_MIGRATED:       return IB_MIG_MIGRATED;
3061         default: return -1;
3062         }
3063 }
3064
3065 static int to_ib_qp_access_flags(int mlx4_flags)
3066 {
3067         int ib_flags = 0;
3068
3069         if (mlx4_flags & MLX4_QP_BIT_RRE)
3070                 ib_flags |= IB_ACCESS_REMOTE_READ;
3071         if (mlx4_flags & MLX4_QP_BIT_RWE)
3072                 ib_flags |= IB_ACCESS_REMOTE_WRITE;
3073         if (mlx4_flags & MLX4_QP_BIT_RAE)
3074                 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
3075
3076         return ib_flags;
3077 }
3078
3079 static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
3080                                 struct mlx4_qp_path *path)
3081 {
3082         struct mlx4_dev *dev = ibdev->dev;
3083         int is_eth;
3084
3085         memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
3086         ib_ah_attr->port_num      = path->sched_queue & 0x40 ? 2 : 1;
3087
3088         if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
3089                 return;
3090
3091         is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
3092                 IB_LINK_LAYER_ETHERNET;
3093         if (is_eth)
3094                 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
3095                 ((path->sched_queue & 4) << 1);
3096         else
3097                 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
3098
3099         ib_ah_attr->dlid          = be16_to_cpu(path->rlid);
3100         ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
3101         ib_ah_attr->static_rate   = path->static_rate ? path->static_rate - 5 : 0;
3102         ib_ah_attr->ah_flags      = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
3103         if (ib_ah_attr->ah_flags) {
3104                 ib_ah_attr->grh.sgid_index = path->mgid_index;
3105                 ib_ah_attr->grh.hop_limit  = path->hop_limit;
3106                 ib_ah_attr->grh.traffic_class =
3107                         (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
3108                 ib_ah_attr->grh.flow_label =
3109                         be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
3110                 memcpy(ib_ah_attr->grh.dgid.raw,
3111                         path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
3112         }
3113 }
3114
3115 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
3116                      struct ib_qp_init_attr *qp_init_attr)
3117 {
3118         struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
3119         struct mlx4_ib_qp *qp = to_mqp(ibqp);
3120         struct mlx4_qp_context context;
3121         int mlx4_state;
3122         int err = 0;
3123
3124         mutex_lock(&qp->mutex);
3125
3126         if (qp->state == IB_QPS_RESET) {
3127                 qp_attr->qp_state = IB_QPS_RESET;
3128                 goto done;
3129         }
3130
3131         err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
3132         if (err) {
3133                 err = -EINVAL;
3134                 goto out;
3135         }
3136
3137         mlx4_state = be32_to_cpu(context.flags) >> 28;
3138
3139         qp->state                    = to_ib_qp_state(mlx4_state);
3140         qp_attr->qp_state            = qp->state;
3141         qp_attr->path_mtu            = context.mtu_msgmax >> 5;
3142         qp_attr->path_mig_state      =
3143                 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
3144         qp_attr->qkey                = be32_to_cpu(context.qkey);
3145         qp_attr->rq_psn              = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
3146         qp_attr->sq_psn              = be32_to_cpu(context.next_send_psn) & 0xffffff;
3147         qp_attr->dest_qp_num         = be32_to_cpu(context.remote_qpn) & 0xffffff;
3148         qp_attr->qp_access_flags     =
3149                 to_ib_qp_access_flags(be32_to_cpu(context.params2));
3150
3151         if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
3152                 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
3153                 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
3154                 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
3155                 qp_attr->alt_port_num   = qp_attr->alt_ah_attr.port_num;
3156         }
3157
3158         qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
3159         if (qp_attr->qp_state == IB_QPS_INIT)
3160                 qp_attr->port_num = qp->port;
3161         else
3162                 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
3163
3164         /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
3165         qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
3166
3167         qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
3168
3169         qp_attr->max_dest_rd_atomic =
3170                 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
3171         qp_attr->min_rnr_timer      =
3172                 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
3173         qp_attr->timeout            = context.pri_path.ackto >> 3;
3174         qp_attr->retry_cnt          = (be32_to_cpu(context.params1) >> 16) & 0x7;
3175         qp_attr->rnr_retry          = (be32_to_cpu(context.params1) >> 13) & 0x7;
3176         qp_attr->alt_timeout        = context.alt_path.ackto >> 3;
3177
3178 done:
3179         qp_attr->cur_qp_state        = qp_attr->qp_state;
3180         qp_attr->cap.max_recv_wr     = qp->rq.wqe_cnt;
3181         qp_attr->cap.max_recv_sge    = qp->rq.max_gs;
3182
3183         if (!ibqp->uobject) {
3184                 qp_attr->cap.max_send_wr  = qp->sq.wqe_cnt;
3185                 qp_attr->cap.max_send_sge = qp->sq.max_gs;
3186         } else {
3187                 qp_attr->cap.max_send_wr  = 0;
3188                 qp_attr->cap.max_send_sge = 0;
3189         }
3190
3191         /*
3192          * We don't support inline sends for kernel QPs (yet), and we
3193          * don't know what userspace's value should be.
3194          */
3195         qp_attr->cap.max_inline_data = 0;
3196
3197         qp_init_attr->cap            = qp_attr->cap;
3198
3199         qp_init_attr->create_flags = 0;
3200         if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
3201                 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
3202
3203         if (qp->flags & MLX4_IB_QP_LSO)
3204                 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
3205
3206         if (qp->flags & MLX4_IB_QP_NETIF)
3207                 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP;
3208
3209         qp_init_attr->sq_sig_type =
3210                 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
3211                 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
3212
3213 out:
3214         mutex_unlock(&qp->mutex);
3215         return err;
3216 }
3217