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].index != -1) {
1543                         context->pri_path.counter_index =
1544                                         dev->counters[qp->port - 1].index;
1545                         optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
1546                 } else
1547                         context->pri_path.counter_index =
1548                                 MLX4_SINK_COUNTER_INDEX(dev->dev);
1549
1550                 if (qp->flags & MLX4_IB_QP_NETIF) {
1551                         mlx4_ib_steer_qp_reg(dev, qp, 1);
1552                         steer_qp = 1;
1553                 }
1554         }
1555
1556         if (attr_mask & IB_QP_PKEY_INDEX) {
1557                 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1558                         context->pri_path.disable_pkey_check = 0x40;
1559                 context->pri_path.pkey_index = attr->pkey_index;
1560                 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
1561         }
1562
1563         if (attr_mask & IB_QP_AV) {
1564                 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path,
1565                                   attr_mask & IB_QP_PORT ?
1566                                   attr->port_num : qp->port))
1567                         goto out;
1568
1569                 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
1570                            MLX4_QP_OPTPAR_SCHED_QUEUE);
1571         }
1572
1573         if (attr_mask & IB_QP_TIMEOUT) {
1574                 context->pri_path.ackto |= attr->timeout << 3;
1575                 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
1576         }
1577
1578         if (attr_mask & IB_QP_ALT_PATH) {
1579                 if (attr->alt_port_num == 0 ||
1580                     attr->alt_port_num > dev->dev->caps.num_ports)
1581                         goto out;
1582
1583                 if (attr->alt_pkey_index >=
1584                     dev->dev->caps.pkey_table_len[attr->alt_port_num])
1585                         goto out;
1586
1587                 if (mlx4_set_alt_path(dev, attr, attr_mask, qp,
1588                                       &context->alt_path,
1589                                       attr->alt_port_num))
1590                         goto out;
1591
1592                 context->alt_path.pkey_index = attr->alt_pkey_index;
1593                 context->alt_path.ackto = attr->alt_timeout << 3;
1594                 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
1595         }
1596
1597         pd = get_pd(qp);
1598         get_cqs(qp, &send_cq, &recv_cq);
1599         context->pd       = cpu_to_be32(pd->pdn);
1600         context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
1601         context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
1602         context->params1  = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
1603
1604         /* Set "fast registration enabled" for all kernel QPs */
1605         if (!qp->ibqp.uobject)
1606                 context->params1 |= cpu_to_be32(1 << 11);
1607
1608         if (attr_mask & IB_QP_RNR_RETRY) {
1609                 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1610                 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
1611         }
1612
1613         if (attr_mask & IB_QP_RETRY_CNT) {
1614                 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1615                 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
1616         }
1617
1618         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1619                 if (attr->max_rd_atomic)
1620                         context->params1 |=
1621                                 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1622                 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
1623         }
1624
1625         if (attr_mask & IB_QP_SQ_PSN)
1626                 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1627
1628         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1629                 if (attr->max_dest_rd_atomic)
1630                         context->params2 |=
1631                                 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1632                 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
1633         }
1634
1635         if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
1636                 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
1637                 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
1638         }
1639
1640         if (ibqp->srq)
1641                 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
1642
1643         if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1644                 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1645                 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
1646         }
1647         if (attr_mask & IB_QP_RQ_PSN)
1648                 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1649
1650         /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
1651         if (attr_mask & IB_QP_QKEY) {
1652                 if (qp->mlx4_ib_qp_type &
1653                     (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
1654                         context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
1655                 else {
1656                         if (mlx4_is_mfunc(dev->dev) &&
1657                             !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
1658                             (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
1659                             MLX4_RESERVED_QKEY_BASE) {
1660                                 pr_err("Cannot use reserved QKEY"
1661                                        " 0x%x (range 0xffff0000..0xffffffff"
1662                                        " is reserved)\n", attr->qkey);
1663                                 err = -EINVAL;
1664                                 goto out;
1665                         }
1666                         context->qkey = cpu_to_be32(attr->qkey);
1667                 }
1668                 optpar |= MLX4_QP_OPTPAR_Q_KEY;
1669         }
1670
1671         if (ibqp->srq)
1672                 context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
1673
1674         if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1675                 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1676
1677         if (cur_state == IB_QPS_INIT &&
1678             new_state == IB_QPS_RTR  &&
1679             (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
1680              ibqp->qp_type == IB_QPT_UD ||
1681              ibqp->qp_type == IB_QPT_RAW_PACKET)) {
1682                 context->pri_path.sched_queue = (qp->port - 1) << 6;
1683                 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
1684                     qp->mlx4_ib_qp_type &
1685                     (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
1686                         context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
1687                         if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
1688                                 context->pri_path.fl = 0x80;
1689                 } else {
1690                         if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
1691                                 context->pri_path.fl = 0x80;
1692                         context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
1693                 }
1694                 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
1695                     IB_LINK_LAYER_ETHERNET) {
1696                         if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI ||
1697                             qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI)
1698                                 context->pri_path.feup = 1 << 7; /* don't fsm */
1699                         /* handle smac_index */
1700                         if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD ||
1701                             qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI ||
1702                             qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) {
1703                                 err = handle_eth_ud_smac_index(dev, qp, (u8 *)attr->smac, context);
1704                                 if (err) {
1705                                         err = -EINVAL;
1706                                         goto out;
1707                                 }
1708                                 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
1709                                         dev->qp1_proxy[qp->port - 1] = qp;
1710                         }
1711                 }
1712         }
1713
1714         if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET) {
1715                 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
1716                                         MLX4_IB_LINK_TYPE_ETH;
1717                 if (dev->dev->caps.tunnel_offload_mode ==  MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
1718                         /* set QP to receive both tunneled & non-tunneled packets */
1719                         if (!(context->flags & cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET)))
1720                                 context->srqn = cpu_to_be32(7 << 28);
1721                 }
1722         }
1723
1724         if (ibqp->qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) {
1725                 int is_eth = rdma_port_get_link_layer(
1726                                 &dev->ib_dev, qp->port) ==
1727                                 IB_LINK_LAYER_ETHERNET;
1728                 if (is_eth) {
1729                         context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH;
1730                         optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH;
1731                 }
1732         }
1733
1734
1735         if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD  &&
1736             attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1737                 sqd_event = 1;
1738         else
1739                 sqd_event = 0;
1740
1741         if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1742                 context->rlkey |= (1 << 4);
1743
1744         /*
1745          * Before passing a kernel QP to the HW, make sure that the
1746          * ownership bits of the send queue are set and the SQ
1747          * headroom is stamped so that the hardware doesn't start
1748          * processing stale work requests.
1749          */
1750         if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
1751                 struct mlx4_wqe_ctrl_seg *ctrl;
1752                 int i;
1753
1754                 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
1755                         ctrl = get_send_wqe(qp, i);
1756                         ctrl->owner_opcode = cpu_to_be32(1 << 31);
1757                         if (qp->sq_max_wqes_per_wr == 1)
1758                                 ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
1759
1760                         stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
1761                 }
1762         }
1763
1764         err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
1765                              to_mlx4_state(new_state), context, optpar,
1766                              sqd_event, &qp->mqp);
1767         if (err)
1768                 goto out;
1769
1770         qp->state = new_state;
1771
1772         if (attr_mask & IB_QP_ACCESS_FLAGS)
1773                 qp->atomic_rd_en = attr->qp_access_flags;
1774         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1775                 qp->resp_depth = attr->max_dest_rd_atomic;
1776         if (attr_mask & IB_QP_PORT) {
1777                 qp->port = attr->port_num;
1778                 update_mcg_macs(dev, qp);
1779         }
1780         if (attr_mask & IB_QP_ALT_PATH)
1781                 qp->alt_port = attr->alt_port_num;
1782
1783         if (is_sqp(dev, qp))
1784                 store_sqp_attrs(to_msqp(qp), attr, attr_mask);
1785
1786         /*
1787          * If we moved QP0 to RTR, bring the IB link up; if we moved
1788          * QP0 to RESET or ERROR, bring the link back down.
1789          */
1790         if (is_qp0(dev, qp)) {
1791                 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
1792                         if (mlx4_INIT_PORT(dev->dev, qp->port))
1793                                 pr_warn("INIT_PORT failed for port %d\n",
1794                                        qp->port);
1795
1796                 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1797                     (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1798                         mlx4_CLOSE_PORT(dev->dev, qp->port);
1799         }
1800
1801         /*
1802          * If we moved a kernel QP to RESET, clean up all old CQ
1803          * entries and reinitialize the QP.
1804          */
1805         if (new_state == IB_QPS_RESET) {
1806                 if (!ibqp->uobject) {
1807                         mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1808                                          ibqp->srq ? to_msrq(ibqp->srq) : NULL);
1809                         if (send_cq != recv_cq)
1810                                 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1811
1812                         qp->rq.head = 0;
1813                         qp->rq.tail = 0;
1814                         qp->sq.head = 0;
1815                         qp->sq.tail = 0;
1816                         qp->sq_next_wqe = 0;
1817                         if (qp->rq.wqe_cnt)
1818                                 *qp->db.db  = 0;
1819
1820                         if (qp->flags & MLX4_IB_QP_NETIF)
1821                                 mlx4_ib_steer_qp_reg(dev, qp, 0);
1822                 }
1823                 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) {
1824                         mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1825                         qp->pri.smac = 0;
1826                         qp->pri.smac_port = 0;
1827                 }
1828                 if (qp->alt.smac) {
1829                         mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1830                         qp->alt.smac = 0;
1831                 }
1832                 if (qp->pri.vid < 0x1000) {
1833                         mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
1834                         qp->pri.vid = 0xFFFF;
1835                         qp->pri.candidate_vid = 0xFFFF;
1836                         qp->pri.update_vid = 0;
1837                 }
1838
1839                 if (qp->alt.vid < 0x1000) {
1840                         mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
1841                         qp->alt.vid = 0xFFFF;
1842                         qp->alt.candidate_vid = 0xFFFF;
1843                         qp->alt.update_vid = 0;
1844                 }
1845         }
1846 out:
1847         if (err && steer_qp)
1848                 mlx4_ib_steer_qp_reg(dev, qp, 0);
1849         kfree(context);
1850         if (qp->pri.candidate_smac ||
1851             (!qp->pri.candidate_smac && qp->pri.candidate_smac_port)) {
1852                 if (err) {
1853                         mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac);
1854                 } else {
1855                         if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port))
1856                                 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1857                         qp->pri.smac = qp->pri.candidate_smac;
1858                         qp->pri.smac_index = qp->pri.candidate_smac_index;
1859                         qp->pri.smac_port = qp->pri.candidate_smac_port;
1860                 }
1861                 qp->pri.candidate_smac = 0;
1862                 qp->pri.candidate_smac_index = 0;
1863                 qp->pri.candidate_smac_port = 0;
1864         }
1865         if (qp->alt.candidate_smac) {
1866                 if (err) {
1867                         mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac);
1868                 } else {
1869                         if (qp->alt.smac)
1870                                 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1871                         qp->alt.smac = qp->alt.candidate_smac;
1872                         qp->alt.smac_index = qp->alt.candidate_smac_index;
1873                         qp->alt.smac_port = qp->alt.candidate_smac_port;
1874                 }
1875                 qp->alt.candidate_smac = 0;
1876                 qp->alt.candidate_smac_index = 0;
1877                 qp->alt.candidate_smac_port = 0;
1878         }
1879
1880         if (qp->pri.update_vid) {
1881                 if (err) {
1882                         if (qp->pri.candidate_vid < 0x1000)
1883                                 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port,
1884                                                      qp->pri.candidate_vid);
1885                 } else {
1886                         if (qp->pri.vid < 0x1000)
1887                                 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port,
1888                                                      qp->pri.vid);
1889                         qp->pri.vid = qp->pri.candidate_vid;
1890                         qp->pri.vlan_port = qp->pri.candidate_vlan_port;
1891                         qp->pri.vlan_index =  qp->pri.candidate_vlan_index;
1892                 }
1893                 qp->pri.candidate_vid = 0xFFFF;
1894                 qp->pri.update_vid = 0;
1895         }
1896
1897         if (qp->alt.update_vid) {
1898                 if (err) {
1899                         if (qp->alt.candidate_vid < 0x1000)
1900                                 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port,
1901                                                      qp->alt.candidate_vid);
1902                 } else {
1903                         if (qp->alt.vid < 0x1000)
1904                                 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port,
1905                                                      qp->alt.vid);
1906                         qp->alt.vid = qp->alt.candidate_vid;
1907                         qp->alt.vlan_port = qp->alt.candidate_vlan_port;
1908                         qp->alt.vlan_index =  qp->alt.candidate_vlan_index;
1909                 }
1910                 qp->alt.candidate_vid = 0xFFFF;
1911                 qp->alt.update_vid = 0;
1912         }
1913
1914         return err;
1915 }
1916
1917 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1918                       int attr_mask, struct ib_udata *udata)
1919 {
1920         struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
1921         struct mlx4_ib_qp *qp = to_mqp(ibqp);
1922         enum ib_qp_state cur_state, new_state;
1923         int err = -EINVAL;
1924         int ll;
1925         mutex_lock(&qp->mutex);
1926
1927         cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1928         new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1929
1930         if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1931                 ll = IB_LINK_LAYER_UNSPECIFIED;
1932         } else {
1933                 int port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1934                 ll = rdma_port_get_link_layer(&dev->ib_dev, port);
1935         }
1936
1937         if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
1938                                 attr_mask, ll)) {
1939                 pr_debug("qpn 0x%x: invalid attribute mask specified "
1940                          "for transition %d to %d. qp_type %d,"
1941                          " attr_mask 0x%x\n",
1942                          ibqp->qp_num, cur_state, new_state,
1943                          ibqp->qp_type, attr_mask);
1944                 goto out;
1945         }
1946
1947         if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) {
1948                 if ((cur_state == IB_QPS_RESET) && (new_state == IB_QPS_INIT)) {
1949                         if ((ibqp->qp_type == IB_QPT_RC) ||
1950                             (ibqp->qp_type == IB_QPT_UD) ||
1951                             (ibqp->qp_type == IB_QPT_UC) ||
1952                             (ibqp->qp_type == IB_QPT_RAW_PACKET) ||
1953                             (ibqp->qp_type == IB_QPT_XRC_INI)) {
1954                                 attr->port_num = mlx4_ib_bond_next_port(dev);
1955                         }
1956                 } else {
1957                         /* no sense in changing port_num
1958                          * when ports are bonded */
1959                         attr_mask &= ~IB_QP_PORT;
1960                 }
1961         }
1962
1963         if ((attr_mask & IB_QP_PORT) &&
1964             (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
1965                 pr_debug("qpn 0x%x: invalid port number (%d) specified "
1966                          "for transition %d to %d. qp_type %d\n",
1967                          ibqp->qp_num, attr->port_num, cur_state,
1968                          new_state, ibqp->qp_type);
1969                 goto out;
1970         }
1971
1972         if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
1973             (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
1974              IB_LINK_LAYER_ETHERNET))
1975                 goto out;
1976
1977         if (attr_mask & IB_QP_PKEY_INDEX) {
1978                 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1979                 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
1980                         pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
1981                                  "for transition %d to %d. qp_type %d\n",
1982                                  ibqp->qp_num, attr->pkey_index, cur_state,
1983                                  new_state, ibqp->qp_type);
1984                         goto out;
1985                 }
1986         }
1987
1988         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1989             attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
1990                 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
1991                          "Transition %d to %d. qp_type %d\n",
1992                          ibqp->qp_num, attr->max_rd_atomic, cur_state,
1993                          new_state, ibqp->qp_type);
1994                 goto out;
1995         }
1996
1997         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1998             attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
1999                 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
2000                          "Transition %d to %d. qp_type %d\n",
2001                          ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
2002                          new_state, ibqp->qp_type);
2003                 goto out;
2004         }
2005
2006         if (cur_state == new_state && cur_state == IB_QPS_RESET) {
2007                 err = 0;
2008                 goto out;
2009         }
2010
2011         err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
2012
2013         if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT))
2014                 attr->port_num = 1;
2015
2016 out:
2017         mutex_unlock(&qp->mutex);
2018         return err;
2019 }
2020
2021 static int vf_get_qp0_qkey(struct mlx4_dev *dev, int qpn, u32 *qkey)
2022 {
2023         int i;
2024         for (i = 0; i < dev->caps.num_ports; i++) {
2025                 if (qpn == dev->caps.qp0_proxy[i] ||
2026                     qpn == dev->caps.qp0_tunnel[i]) {
2027                         *qkey = dev->caps.qp0_qkey[i];
2028                         return 0;
2029                 }
2030         }
2031         return -EINVAL;
2032 }
2033
2034 static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
2035                                   struct ib_send_wr *wr,
2036                                   void *wqe, unsigned *mlx_seg_len)
2037 {
2038         struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
2039         struct ib_device *ib_dev = &mdev->ib_dev;
2040         struct mlx4_wqe_mlx_seg *mlx = wqe;
2041         struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2042         struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2043         u16 pkey;
2044         u32 qkey;
2045         int send_size;
2046         int header_size;
2047         int spc;
2048         int i;
2049
2050         if (wr->opcode != IB_WR_SEND)
2051                 return -EINVAL;
2052
2053         send_size = 0;
2054
2055         for (i = 0; i < wr->num_sge; ++i)
2056                 send_size += wr->sg_list[i].length;
2057
2058         /* for proxy-qp0 sends, need to add in size of tunnel header */
2059         /* for tunnel-qp0 sends, tunnel header is already in s/g list */
2060         if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
2061                 send_size += sizeof (struct mlx4_ib_tunnel_header);
2062
2063         ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
2064
2065         if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
2066                 sqp->ud_header.lrh.service_level =
2067                         be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2068                 sqp->ud_header.lrh.destination_lid =
2069                         cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2070                 sqp->ud_header.lrh.source_lid =
2071                         cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2072         }
2073
2074         mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2075
2076         /* force loopback */
2077         mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
2078         mlx->rlid = sqp->ud_header.lrh.destination_lid;
2079
2080         sqp->ud_header.lrh.virtual_lane    = 0;
2081         sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
2082         ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
2083         sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2084         if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
2085                 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2086         else
2087                 sqp->ud_header.bth.destination_qpn =
2088                         cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
2089
2090         sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2091         if (mlx4_is_master(mdev->dev)) {
2092                 if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2093                         return -EINVAL;
2094         } else {
2095                 if (vf_get_qp0_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
2096                         return -EINVAL;
2097         }
2098         sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
2099         sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
2100
2101         sqp->ud_header.bth.opcode        = IB_OPCODE_UD_SEND_ONLY;
2102         sqp->ud_header.immediate_present = 0;
2103
2104         header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2105
2106         /*
2107          * Inline data segments may not cross a 64 byte boundary.  If
2108          * our UD header is bigger than the space available up to the
2109          * next 64 byte boundary in the WQE, use two inline data
2110          * segments to hold the UD header.
2111          */
2112         spc = MLX4_INLINE_ALIGN -
2113               ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2114         if (header_size <= spc) {
2115                 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2116                 memcpy(inl + 1, sqp->header_buf, header_size);
2117                 i = 1;
2118         } else {
2119                 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2120                 memcpy(inl + 1, sqp->header_buf, spc);
2121
2122                 inl = (void *) (inl + 1) + spc;
2123                 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2124                 /*
2125                  * Need a barrier here to make sure all the data is
2126                  * visible before the byte_count field is set.
2127                  * Otherwise the HCA prefetcher could grab the 64-byte
2128                  * chunk with this inline segment and get a valid (!=
2129                  * 0xffffffff) byte count but stale data, and end up
2130                  * generating a packet with bad headers.
2131                  *
2132                  * The first inline segment's byte_count field doesn't
2133                  * need a barrier, because it comes after a
2134                  * control/MLX segment and therefore is at an offset
2135                  * of 16 mod 64.
2136                  */
2137                 wmb();
2138                 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2139                 i = 2;
2140         }
2141
2142         *mlx_seg_len =
2143         ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2144         return 0;
2145 }
2146
2147 static void mlx4_u64_to_smac(u8 *dst_mac, u64 src_mac)
2148 {
2149         int i;
2150
2151         for (i = ETH_ALEN; i; i--) {
2152                 dst_mac[i - 1] = src_mac & 0xff;
2153                 src_mac >>= 8;
2154         }
2155 }
2156
2157 static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
2158                             void *wqe, unsigned *mlx_seg_len)
2159 {
2160         struct ib_device *ib_dev = sqp->qp.ibqp.device;
2161         struct mlx4_wqe_mlx_seg *mlx = wqe;
2162         struct mlx4_wqe_ctrl_seg *ctrl = wqe;
2163         struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2164         struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2165         union ib_gid sgid;
2166         u16 pkey;
2167         int send_size;
2168         int header_size;
2169         int spc;
2170         int i;
2171         int err = 0;
2172         u16 vlan = 0xffff;
2173         bool is_eth;
2174         bool is_vlan = false;
2175         bool is_grh;
2176
2177         send_size = 0;
2178         for (i = 0; i < wr->num_sge; ++i)
2179                 send_size += wr->sg_list[i].length;
2180
2181         is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
2182         is_grh = mlx4_ib_ah_grh_present(ah);
2183         if (is_eth) {
2184                 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2185                         /* When multi-function is enabled, the ib_core gid
2186                          * indexes don't necessarily match the hw ones, so
2187                          * we must use our own cache */
2188                         err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev,
2189                                                            be32_to_cpu(ah->av.ib.port_pd) >> 24,
2190                                                            ah->av.ib.gid_index, &sgid.raw[0]);
2191                         if (err)
2192                                 return err;
2193                 } else  {
2194                         err = ib_get_cached_gid(ib_dev,
2195                                                 be32_to_cpu(ah->av.ib.port_pd) >> 24,
2196                                                 ah->av.ib.gid_index, &sgid);
2197                         if (err)
2198                                 return err;
2199                 }
2200
2201                 if (ah->av.eth.vlan != cpu_to_be16(0xffff)) {
2202                         vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff;
2203                         is_vlan = 1;
2204                 }
2205         }
2206         ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
2207
2208         if (!is_eth) {
2209                 sqp->ud_header.lrh.service_level =
2210                         be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2211                 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
2212                 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2213         }
2214
2215         if (is_grh) {
2216                 sqp->ud_header.grh.traffic_class =
2217                         (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
2218                 sqp->ud_header.grh.flow_label    =
2219                         ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
2220                 sqp->ud_header.grh.hop_limit     = ah->av.ib.hop_limit;
2221                 if (is_eth)
2222                         memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16);
2223                 else {
2224                 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2225                         /* When multi-function is enabled, the ib_core gid
2226                          * indexes don't necessarily match the hw ones, so
2227                          * we must use our own cache */
2228                         sqp->ud_header.grh.source_gid.global.subnet_prefix =
2229                                 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2230                                                        subnet_prefix;
2231                         sqp->ud_header.grh.source_gid.global.interface_id =
2232                                 to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
2233                                                guid_cache[ah->av.ib.gid_index];
2234                 } else
2235                         ib_get_cached_gid(ib_dev,
2236                                           be32_to_cpu(ah->av.ib.port_pd) >> 24,
2237                                           ah->av.ib.gid_index,
2238                                           &sqp->ud_header.grh.source_gid);
2239                 }
2240                 memcpy(sqp->ud_header.grh.destination_gid.raw,
2241                        ah->av.ib.dgid, 16);
2242         }
2243
2244         mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2245
2246         if (!is_eth) {
2247                 mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
2248                                           (sqp->ud_header.lrh.destination_lid ==
2249                                            IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
2250                                           (sqp->ud_header.lrh.service_level << 8));
2251                 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
2252                         mlx->flags |= cpu_to_be32(0x1); /* force loopback */
2253                 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2254         }
2255
2256         switch (wr->opcode) {
2257         case IB_WR_SEND:
2258                 sqp->ud_header.bth.opcode        = IB_OPCODE_UD_SEND_ONLY;
2259                 sqp->ud_header.immediate_present = 0;
2260                 break;
2261         case IB_WR_SEND_WITH_IMM:
2262                 sqp->ud_header.bth.opcode        = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
2263                 sqp->ud_header.immediate_present = 1;
2264                 sqp->ud_header.immediate_data    = wr->ex.imm_data;
2265                 break;
2266         default:
2267                 return -EINVAL;
2268         }
2269
2270         if (is_eth) {
2271                 struct in6_addr in6;
2272
2273                 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
2274
2275                 mlx->sched_prio = cpu_to_be16(pcp);
2276
2277                 memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
2278                 /* FIXME: cache smac value? */
2279                 memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2);
2280                 memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4);
2281                 memcpy(&in6, sgid.raw, sizeof(in6));
2282
2283                 if (!mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
2284                         u64 mac = atomic64_read(&to_mdev(ib_dev)->iboe.mac[sqp->qp.port - 1]);
2285                         u8 smac[ETH_ALEN];
2286
2287                         mlx4_u64_to_smac(smac, mac);
2288                         memcpy(sqp->ud_header.eth.smac_h, smac, ETH_ALEN);
2289                 } else {
2290                         /* use the src mac of the tunnel */
2291                         memcpy(sqp->ud_header.eth.smac_h, ah->av.eth.s_mac, ETH_ALEN);
2292                 }
2293
2294                 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
2295                         mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
2296                 if (!is_vlan) {
2297                         sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2298                 } else {
2299                         sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
2300                         sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
2301                 }
2302         } else {
2303                 sqp->ud_header.lrh.virtual_lane    = !sqp->qp.ibqp.qp_num ? 15 : 0;
2304                 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
2305                         sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
2306         }
2307         sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
2308         if (!sqp->qp.ibqp.qp_num)
2309                 ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
2310         else
2311                 ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
2312         sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2313         sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2314         sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2315         sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
2316                                                sqp->qkey : wr->wr.ud.remote_qkey);
2317         sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
2318
2319         header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2320
2321         if (0) {
2322                 pr_err("built UD header of size %d:\n", header_size);
2323                 for (i = 0; i < header_size / 4; ++i) {
2324                         if (i % 8 == 0)
2325                                 pr_err("  [%02x] ", i * 4);
2326                         pr_cont(" %08x",
2327                                 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
2328                         if ((i + 1) % 8 == 0)
2329                                 pr_cont("\n");
2330                 }
2331                 pr_err("\n");
2332         }
2333
2334         /*
2335          * Inline data segments may not cross a 64 byte boundary.  If
2336          * our UD header is bigger than the space available up to the
2337          * next 64 byte boundary in the WQE, use two inline data
2338          * segments to hold the UD header.
2339          */
2340         spc = MLX4_INLINE_ALIGN -
2341                 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2342         if (header_size <= spc) {
2343                 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2344                 memcpy(inl + 1, sqp->header_buf, header_size);
2345                 i = 1;
2346         } else {
2347                 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2348                 memcpy(inl + 1, sqp->header_buf, spc);
2349
2350                 inl = (void *) (inl + 1) + spc;
2351                 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2352                 /*
2353                  * Need a barrier here to make sure all the data is
2354                  * visible before the byte_count field is set.
2355                  * Otherwise the HCA prefetcher could grab the 64-byte
2356                  * chunk with this inline segment and get a valid (!=
2357                  * 0xffffffff) byte count but stale data, and end up
2358                  * generating a packet with bad headers.
2359                  *
2360                  * The first inline segment's byte_count field doesn't
2361                  * need a barrier, because it comes after a
2362                  * control/MLX segment and therefore is at an offset
2363                  * of 16 mod 64.
2364                  */
2365                 wmb();
2366                 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2367                 i = 2;
2368         }
2369
2370         *mlx_seg_len =
2371                 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2372         return 0;
2373 }
2374
2375 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
2376 {
2377         unsigned cur;
2378         struct mlx4_ib_cq *cq;
2379
2380         cur = wq->head - wq->tail;
2381         if (likely(cur + nreq < wq->max_post))
2382                 return 0;
2383
2384         cq = to_mcq(ib_cq);
2385         spin_lock(&cq->lock);
2386         cur = wq->head - wq->tail;
2387         spin_unlock(&cq->lock);
2388
2389         return cur + nreq >= wq->max_post;
2390 }
2391
2392 static __be32 convert_access(int acc)
2393 {
2394         return (acc & IB_ACCESS_REMOTE_ATOMIC ?
2395                 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC)       : 0) |
2396                (acc & IB_ACCESS_REMOTE_WRITE  ?
2397                 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
2398                (acc & IB_ACCESS_REMOTE_READ   ?
2399                 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ)  : 0) |
2400                (acc & IB_ACCESS_LOCAL_WRITE   ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE)  : 0) |
2401                 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
2402 }
2403
2404 static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
2405 {
2406         struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
2407         int i;
2408
2409         for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i)
2410                 mfrpl->mapped_page_list[i] =
2411                         cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] |
2412                                     MLX4_MTT_FLAG_PRESENT);
2413
2414         fseg->flags             = convert_access(wr->wr.fast_reg.access_flags);
2415         fseg->mem_key           = cpu_to_be32(wr->wr.fast_reg.rkey);
2416         fseg->buf_list          = cpu_to_be64(mfrpl->map);
2417         fseg->start_addr        = cpu_to_be64(wr->wr.fast_reg.iova_start);
2418         fseg->reg_len           = cpu_to_be64(wr->wr.fast_reg.length);
2419         fseg->offset            = 0; /* XXX -- is this just for ZBVA? */
2420         fseg->page_size         = cpu_to_be32(wr->wr.fast_reg.page_shift);
2421         fseg->reserved[0]       = 0;
2422         fseg->reserved[1]       = 0;
2423 }
2424
2425 static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
2426 {
2427         bseg->flags1 =
2428                 convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
2429                 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ  |
2430                             MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
2431                             MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
2432         bseg->flags2 = 0;
2433         if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
2434                 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
2435         if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
2436                 bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
2437         bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
2438         bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
2439         bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
2440         bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
2441 }
2442
2443 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
2444 {
2445         memset(iseg, 0, sizeof(*iseg));
2446         iseg->mem_key = cpu_to_be32(rkey);
2447 }
2448
2449 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
2450                                           u64 remote_addr, u32 rkey)
2451 {
2452         rseg->raddr    = cpu_to_be64(remote_addr);
2453         rseg->rkey     = cpu_to_be32(rkey);
2454         rseg->reserved = 0;
2455 }
2456
2457 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
2458 {
2459         if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
2460                 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
2461                 aseg->compare  = cpu_to_be64(wr->wr.atomic.compare_add);
2462         } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
2463                 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2464                 aseg->compare  = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2465         } else {
2466                 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
2467                 aseg->compare  = 0;
2468         }
2469
2470 }
2471
2472 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
2473                                   struct ib_send_wr *wr)
2474 {
2475         aseg->swap_add          = cpu_to_be64(wr->wr.atomic.swap);
2476         aseg->swap_add_mask     = cpu_to_be64(wr->wr.atomic.swap_mask);
2477         aseg->compare           = cpu_to_be64(wr->wr.atomic.compare_add);
2478         aseg->compare_mask      = cpu_to_be64(wr->wr.atomic.compare_add_mask);
2479 }
2480
2481 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
2482                              struct ib_send_wr *wr)
2483 {
2484         memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
2485         dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2486         dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2487         dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
2488         memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
2489 }
2490
2491 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
2492                                     struct mlx4_wqe_datagram_seg *dseg,
2493                                     struct ib_send_wr *wr,
2494                                     enum mlx4_ib_qp_type qpt)
2495 {
2496         union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av;
2497         struct mlx4_av sqp_av = {0};
2498         int port = *((u8 *) &av->ib.port_pd) & 0x3;
2499
2500         /* force loopback */
2501         sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
2502         sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
2503         sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
2504                         cpu_to_be32(0xf0000000);
2505
2506         memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
2507         if (qpt == MLX4_IB_QPT_PROXY_GSI)
2508                 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
2509         else
2510                 dseg->dqpn = cpu_to_be32(dev->dev->caps.qp0_tunnel[port - 1]);
2511         /* Use QKEY from the QP context, which is set by master */
2512         dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
2513 }
2514
2515 static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len)
2516 {
2517         struct mlx4_wqe_inline_seg *inl = wqe;
2518         struct mlx4_ib_tunnel_header hdr;
2519         struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
2520         int spc;
2521         int i;
2522
2523         memcpy(&hdr.av, &ah->av, sizeof hdr.av);
2524         hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
2525         hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index);
2526         hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
2527         memcpy(hdr.mac, ah->av.eth.mac, 6);
2528         hdr.vlan = ah->av.eth.vlan;
2529
2530         spc = MLX4_INLINE_ALIGN -
2531                 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2532         if (sizeof (hdr) <= spc) {
2533                 memcpy(inl + 1, &hdr, sizeof (hdr));
2534                 wmb();
2535                 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
2536                 i = 1;
2537         } else {
2538                 memcpy(inl + 1, &hdr, spc);
2539                 wmb();
2540                 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2541
2542                 inl = (void *) (inl + 1) + spc;
2543                 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
2544                 wmb();
2545                 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
2546                 i = 2;
2547         }
2548
2549         *mlx_seg_len =
2550                 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
2551 }
2552
2553 static void set_mlx_icrc_seg(void *dseg)
2554 {
2555         u32 *t = dseg;
2556         struct mlx4_wqe_inline_seg *iseg = dseg;
2557
2558         t[1] = 0;
2559
2560         /*
2561          * Need a barrier here before writing the byte_count field to
2562          * make sure that all the data is visible before the
2563          * byte_count field is set.  Otherwise, if the segment begins
2564          * a new cacheline, the HCA prefetcher could grab the 64-byte
2565          * chunk and get a valid (!= * 0xffffffff) byte count but
2566          * stale data, and end up sending the wrong data.
2567          */
2568         wmb();
2569
2570         iseg->byte_count = cpu_to_be32((1 << 31) | 4);
2571 }
2572
2573 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2574 {
2575         dseg->lkey       = cpu_to_be32(sg->lkey);
2576         dseg->addr       = cpu_to_be64(sg->addr);
2577
2578         /*
2579          * Need a barrier here before writing the byte_count field to
2580          * make sure that all the data is visible before the
2581          * byte_count field is set.  Otherwise, if the segment begins
2582          * a new cacheline, the HCA prefetcher could grab the 64-byte
2583          * chunk and get a valid (!= * 0xffffffff) byte count but
2584          * stale data, and end up sending the wrong data.
2585          */
2586         wmb();
2587
2588         dseg->byte_count = cpu_to_be32(sg->length);
2589 }
2590
2591 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
2592 {
2593         dseg->byte_count = cpu_to_be32(sg->length);
2594         dseg->lkey       = cpu_to_be32(sg->lkey);
2595         dseg->addr       = cpu_to_be64(sg->addr);
2596 }
2597
2598 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
2599                          struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
2600                          __be32 *lso_hdr_sz, __be32 *blh)
2601 {
2602         unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16);
2603
2604         if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
2605                 *blh = cpu_to_be32(1 << 6);
2606
2607         if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
2608                      wr->num_sge > qp->sq.max_gs - (halign >> 4)))
2609                 return -EINVAL;
2610
2611         memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
2612
2613         *lso_hdr_sz  = cpu_to_be32(wr->wr.ud.mss << 16 | wr->wr.ud.hlen);
2614         *lso_seg_len = halign;
2615         return 0;
2616 }
2617
2618 static __be32 send_ieth(struct ib_send_wr *wr)
2619 {
2620         switch (wr->opcode) {
2621         case IB_WR_SEND_WITH_IMM:
2622         case IB_WR_RDMA_WRITE_WITH_IMM:
2623                 return wr->ex.imm_data;
2624
2625         case IB_WR_SEND_WITH_INV:
2626                 return cpu_to_be32(wr->ex.invalidate_rkey);
2627
2628         default:
2629                 return 0;
2630         }
2631 }
2632
2633 static void add_zero_len_inline(void *wqe)
2634 {
2635         struct mlx4_wqe_inline_seg *inl = wqe;
2636         memset(wqe, 0, 16);
2637         inl->byte_count = cpu_to_be32(1 << 31);
2638 }
2639
2640 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2641                       struct ib_send_wr **bad_wr)
2642 {
2643         struct mlx4_ib_qp *qp = to_mqp(ibqp);
2644         void *wqe;
2645         struct mlx4_wqe_ctrl_seg *ctrl;
2646         struct mlx4_wqe_data_seg *dseg;
2647         unsigned long flags;
2648         int nreq;
2649         int err = 0;
2650         unsigned ind;
2651         int uninitialized_var(stamp);
2652         int uninitialized_var(size);
2653         unsigned uninitialized_var(seglen);
2654         __be32 dummy;
2655         __be32 *lso_wqe;
2656         __be32 uninitialized_var(lso_hdr_sz);
2657         __be32 blh;
2658         int i;
2659         struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
2660
2661         spin_lock_irqsave(&qp->sq.lock, flags);
2662         if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
2663                 err = -EIO;
2664                 *bad_wr = wr;
2665                 nreq = 0;
2666                 goto out;
2667         }
2668
2669         ind = qp->sq_next_wqe;
2670
2671         for (nreq = 0; wr; ++nreq, wr = wr->next) {
2672                 lso_wqe = &dummy;
2673                 blh = 0;
2674
2675                 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
2676                         err = -ENOMEM;
2677                         *bad_wr = wr;
2678                         goto out;
2679                 }
2680
2681                 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
2682                         err = -EINVAL;
2683                         *bad_wr = wr;
2684                         goto out;
2685                 }
2686
2687                 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
2688                 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
2689
2690                 ctrl->srcrb_flags =
2691                         (wr->send_flags & IB_SEND_SIGNALED ?
2692                          cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
2693                         (wr->send_flags & IB_SEND_SOLICITED ?
2694                          cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
2695                         ((wr->send_flags & IB_SEND_IP_CSUM) ?
2696                          cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
2697                                      MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
2698                         qp->sq_signal_bits;
2699
2700                 ctrl->imm = send_ieth(wr);
2701
2702                 wqe += sizeof *ctrl;
2703                 size = sizeof *ctrl / 16;
2704
2705                 switch (qp->mlx4_ib_qp_type) {
2706                 case MLX4_IB_QPT_RC:
2707                 case MLX4_IB_QPT_UC:
2708                         switch (wr->opcode) {
2709                         case IB_WR_ATOMIC_CMP_AND_SWP:
2710                         case IB_WR_ATOMIC_FETCH_AND_ADD:
2711                         case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
2712                                 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2713                                               wr->wr.atomic.rkey);
2714                                 wqe  += sizeof (struct mlx4_wqe_raddr_seg);
2715
2716                                 set_atomic_seg(wqe, wr);
2717                                 wqe  += sizeof (struct mlx4_wqe_atomic_seg);
2718
2719                                 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2720                                          sizeof (struct mlx4_wqe_atomic_seg)) / 16;
2721
2722                                 break;
2723
2724                         case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2725                                 set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
2726                                               wr->wr.atomic.rkey);
2727                                 wqe  += sizeof (struct mlx4_wqe_raddr_seg);
2728
2729                                 set_masked_atomic_seg(wqe, wr);
2730                                 wqe  += sizeof (struct mlx4_wqe_masked_atomic_seg);
2731
2732                                 size += (sizeof (struct mlx4_wqe_raddr_seg) +
2733                                          sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
2734
2735                                 break;
2736
2737                         case IB_WR_RDMA_READ:
2738                         case IB_WR_RDMA_WRITE:
2739                         case IB_WR_RDMA_WRITE_WITH_IMM:
2740                                 set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
2741                                               wr->wr.rdma.rkey);
2742                                 wqe  += sizeof (struct mlx4_wqe_raddr_seg);
2743                                 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
2744                                 break;
2745
2746                         case IB_WR_LOCAL_INV:
2747                                 ctrl->srcrb_flags |=
2748                                         cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2749                                 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
2750                                 wqe  += sizeof (struct mlx4_wqe_local_inval_seg);
2751                                 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
2752                                 break;
2753
2754                         case IB_WR_FAST_REG_MR:
2755                                 ctrl->srcrb_flags |=
2756                                         cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2757                                 set_fmr_seg(wqe, wr);
2758                                 wqe  += sizeof (struct mlx4_wqe_fmr_seg);
2759                                 size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
2760                                 break;
2761
2762                         case IB_WR_BIND_MW:
2763                                 ctrl->srcrb_flags |=
2764                                         cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
2765                                 set_bind_seg(wqe, wr);
2766                                 wqe  += sizeof(struct mlx4_wqe_bind_seg);
2767                                 size += sizeof(struct mlx4_wqe_bind_seg) / 16;
2768                                 break;
2769                         default:
2770                                 /* No extra segments required for sends */
2771                                 break;
2772                         }
2773                         break;
2774
2775                 case MLX4_IB_QPT_TUN_SMI_OWNER:
2776                         err =  build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2777                         if (unlikely(err)) {
2778                                 *bad_wr = wr;
2779                                 goto out;
2780                         }
2781                         wqe  += seglen;
2782                         size += seglen / 16;
2783                         break;
2784                 case MLX4_IB_QPT_TUN_SMI:
2785                 case MLX4_IB_QPT_TUN_GSI:
2786                         /* this is a UD qp used in MAD responses to slaves. */
2787                         set_datagram_seg(wqe, wr);
2788                         /* set the forced-loopback bit in the data seg av */
2789                         *(__be32 *) wqe |= cpu_to_be32(0x80000000);
2790                         wqe  += sizeof (struct mlx4_wqe_datagram_seg);
2791                         size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2792                         break;
2793                 case MLX4_IB_QPT_UD:
2794                         set_datagram_seg(wqe, wr);
2795                         wqe  += sizeof (struct mlx4_wqe_datagram_seg);
2796                         size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2797
2798                         if (wr->opcode == IB_WR_LSO) {
2799                                 err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh);
2800                                 if (unlikely(err)) {
2801                                         *bad_wr = wr;
2802                                         goto out;
2803                                 }
2804                                 lso_wqe = (__be32 *) wqe;
2805                                 wqe  += seglen;
2806                                 size += seglen / 16;
2807                         }
2808                         break;
2809
2810                 case MLX4_IB_QPT_PROXY_SMI_OWNER:
2811                         err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
2812                         if (unlikely(err)) {
2813                                 *bad_wr = wr;
2814                                 goto out;
2815                         }
2816                         wqe  += seglen;
2817                         size += seglen / 16;
2818                         /* to start tunnel header on a cache-line boundary */
2819                         add_zero_len_inline(wqe);
2820                         wqe += 16;
2821                         size++;
2822                         build_tunnel_header(wr, wqe, &seglen);
2823                         wqe  += seglen;
2824                         size += seglen / 16;
2825                         break;
2826                 case MLX4_IB_QPT_PROXY_SMI:
2827                 case MLX4_IB_QPT_PROXY_GSI:
2828                         /* If we are tunneling special qps, this is a UD qp.
2829                          * In this case we first add a UD segment targeting
2830                          * the tunnel qp, and then add a header with address
2831                          * information */
2832                         set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr,
2833                                                 qp->mlx4_ib_qp_type);
2834                         wqe  += sizeof (struct mlx4_wqe_datagram_seg);
2835                         size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
2836                         build_tunnel_header(wr, wqe, &seglen);
2837                         wqe  += seglen;
2838                         size += seglen / 16;
2839                         break;
2840
2841                 case MLX4_IB_QPT_SMI:
2842                 case MLX4_IB_QPT_GSI:
2843                         err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen);
2844                         if (unlikely(err)) {
2845                                 *bad_wr = wr;
2846                                 goto out;
2847                         }
2848                         wqe  += seglen;
2849                         size += seglen / 16;
2850                         break;
2851
2852                 default:
2853                         break;
2854                 }
2855
2856                 /*
2857                  * Write data segments in reverse order, so as to
2858                  * overwrite cacheline stamp last within each
2859                  * cacheline.  This avoids issues with WQE
2860                  * prefetching.
2861                  */
2862
2863                 dseg = wqe;
2864                 dseg += wr->num_sge - 1;
2865                 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
2866
2867                 /* Add one more inline data segment for ICRC for MLX sends */
2868                 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2869                              qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
2870                              qp->mlx4_ib_qp_type &
2871                              (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
2872                         set_mlx_icrc_seg(dseg + 1);
2873                         size += sizeof (struct mlx4_wqe_data_seg) / 16;
2874                 }
2875
2876                 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
2877                         set_data_seg(dseg, wr->sg_list + i);
2878
2879                 /*
2880                  * Possibly overwrite stamping in cacheline with LSO
2881                  * segment only after making sure all data segments
2882                  * are written.
2883                  */
2884                 wmb();
2885                 *lso_wqe = lso_hdr_sz;
2886
2887                 ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
2888                                     MLX4_WQE_CTRL_FENCE : 0) | size;
2889
2890                 /*
2891                  * Make sure descriptor is fully written before
2892                  * setting ownership bit (because HW can start
2893                  * executing as soon as we do).
2894                  */
2895                 wmb();
2896
2897                 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
2898                         *bad_wr = wr;
2899                         err = -EINVAL;
2900                         goto out;
2901                 }
2902
2903                 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
2904                         (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
2905
2906                 stamp = ind + qp->sq_spare_wqes;
2907                 ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
2908
2909                 /*
2910                  * We can improve latency by not stamping the last
2911                  * send queue WQE until after ringing the doorbell, so
2912                  * only stamp here if there are still more WQEs to post.
2913                  *
2914                  * Same optimization applies to padding with NOP wqe
2915                  * in case of WQE shrinking (used to prevent wrap-around
2916                  * in the middle of WR).
2917                  */
2918                 if (wr->next) {
2919                         stamp_send_wqe(qp, stamp, size * 16);
2920                         ind = pad_wraparound(qp, ind);
2921                 }
2922         }
2923
2924 out:
2925         if (likely(nreq)) {
2926                 qp->sq.head += nreq;
2927
2928                 /*
2929                  * Make sure that descriptors are written before
2930                  * doorbell record.
2931                  */
2932                 wmb();
2933
2934                 writel(qp->doorbell_qpn,
2935                        to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
2936
2937                 /*
2938                  * Make sure doorbells don't leak out of SQ spinlock
2939                  * and reach the HCA out of order.
2940                  */
2941                 mmiowb();
2942
2943                 stamp_send_wqe(qp, stamp, size * 16);
2944
2945                 ind = pad_wraparound(qp, ind);
2946                 qp->sq_next_wqe = ind;
2947         }
2948
2949         spin_unlock_irqrestore(&qp->sq.lock, flags);
2950
2951         return err;
2952 }
2953
2954 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2955                       struct ib_recv_wr **bad_wr)
2956 {
2957         struct mlx4_ib_qp *qp = to_mqp(ibqp);
2958         struct mlx4_wqe_data_seg *scat;
2959         unsigned long flags;
2960         int err = 0;
2961         int nreq;
2962         int ind;
2963         int max_gs;
2964         int i;
2965         struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
2966
2967         max_gs = qp->rq.max_gs;
2968         spin_lock_irqsave(&qp->rq.lock, flags);
2969
2970         if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
2971                 err = -EIO;
2972                 *bad_wr = wr;
2973                 nreq = 0;
2974                 goto out;
2975         }
2976
2977         ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2978
2979         for (nreq = 0; wr; ++nreq, wr = wr->next) {
2980                 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2981                         err = -ENOMEM;
2982                         *bad_wr = wr;
2983                         goto out;
2984                 }
2985
2986                 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2987                         err = -EINVAL;
2988                         *bad_wr = wr;
2989                         goto out;
2990                 }
2991
2992                 scat = get_recv_wqe(qp, ind);
2993
2994                 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
2995                     MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
2996                         ib_dma_sync_single_for_device(ibqp->device,
2997                                                       qp->sqp_proxy_rcv[ind].map,
2998                                                       sizeof (struct mlx4_ib_proxy_sqp_hdr),
2999                                                       DMA_FROM_DEVICE);
3000                         scat->byte_count =
3001                                 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
3002                         /* use dma lkey from upper layer entry */
3003                         scat->lkey = cpu_to_be32(wr->sg_list->lkey);
3004                         scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
3005                         scat++;
3006                         max_gs--;
3007                 }
3008
3009                 for (i = 0; i < wr->num_sge; ++i)
3010                         __set_data_seg(scat + i, wr->sg_list + i);
3011
3012                 if (i < max_gs) {
3013                         scat[i].byte_count = 0;
3014                         scat[i].lkey       = cpu_to_be32(MLX4_INVALID_LKEY);
3015                         scat[i].addr       = 0;
3016                 }
3017
3018                 qp->rq.wrid[ind] = wr->wr_id;
3019
3020                 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
3021         }
3022
3023 out:
3024         if (likely(nreq)) {
3025                 qp->rq.head += nreq;
3026
3027                 /*
3028                  * Make sure that descriptors are written before
3029                  * doorbell record.
3030                  */
3031                 wmb();
3032
3033                 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
3034         }
3035
3036         spin_unlock_irqrestore(&qp->rq.lock, flags);
3037
3038         return err;
3039 }
3040
3041 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
3042 {
3043         switch (mlx4_state) {
3044         case MLX4_QP_STATE_RST:      return IB_QPS_RESET;
3045         case MLX4_QP_STATE_INIT:     return IB_QPS_INIT;
3046         case MLX4_QP_STATE_RTR:      return IB_QPS_RTR;
3047         case MLX4_QP_STATE_RTS:      return IB_QPS_RTS;
3048         case MLX4_QP_STATE_SQ_DRAINING:
3049         case MLX4_QP_STATE_SQD:      return IB_QPS_SQD;
3050         case MLX4_QP_STATE_SQER:     return IB_QPS_SQE;
3051         case MLX4_QP_STATE_ERR:      return IB_QPS_ERR;
3052         default:                     return -1;
3053         }
3054 }
3055
3056 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
3057 {
3058         switch (mlx4_mig_state) {
3059         case MLX4_QP_PM_ARMED:          return IB_MIG_ARMED;
3060         case MLX4_QP_PM_REARM:          return IB_MIG_REARM;
3061         case MLX4_QP_PM_MIGRATED:       return IB_MIG_MIGRATED;
3062         default: return -1;
3063         }
3064 }
3065
3066 static int to_ib_qp_access_flags(int mlx4_flags)
3067 {
3068         int ib_flags = 0;
3069
3070         if (mlx4_flags & MLX4_QP_BIT_RRE)
3071                 ib_flags |= IB_ACCESS_REMOTE_READ;
3072         if (mlx4_flags & MLX4_QP_BIT_RWE)
3073                 ib_flags |= IB_ACCESS_REMOTE_WRITE;
3074         if (mlx4_flags & MLX4_QP_BIT_RAE)
3075                 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
3076
3077         return ib_flags;
3078 }
3079
3080 static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
3081                                 struct mlx4_qp_path *path)
3082 {
3083         struct mlx4_dev *dev = ibdev->dev;
3084         int is_eth;
3085
3086         memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
3087         ib_ah_attr->port_num      = path->sched_queue & 0x40 ? 2 : 1;
3088
3089         if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
3090                 return;
3091
3092         is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
3093                 IB_LINK_LAYER_ETHERNET;
3094         if (is_eth)
3095                 ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
3096                 ((path->sched_queue & 4) << 1);
3097         else
3098                 ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
3099
3100         ib_ah_attr->dlid          = be16_to_cpu(path->rlid);
3101         ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
3102         ib_ah_attr->static_rate   = path->static_rate ? path->static_rate - 5 : 0;
3103         ib_ah_attr->ah_flags      = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
3104         if (ib_ah_attr->ah_flags) {
3105                 ib_ah_attr->grh.sgid_index = path->mgid_index;
3106                 ib_ah_attr->grh.hop_limit  = path->hop_limit;
3107                 ib_ah_attr->grh.traffic_class =
3108                         (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
3109                 ib_ah_attr->grh.flow_label =
3110                         be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
3111                 memcpy(ib_ah_attr->grh.dgid.raw,
3112                         path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
3113         }
3114 }
3115
3116 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
3117                      struct ib_qp_init_attr *qp_init_attr)
3118 {
3119         struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
3120         struct mlx4_ib_qp *qp = to_mqp(ibqp);
3121         struct mlx4_qp_context context;
3122         int mlx4_state;
3123         int err = 0;
3124
3125         mutex_lock(&qp->mutex);
3126
3127         if (qp->state == IB_QPS_RESET) {
3128                 qp_attr->qp_state = IB_QPS_RESET;
3129                 goto done;
3130         }
3131
3132         err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
3133         if (err) {
3134                 err = -EINVAL;
3135                 goto out;
3136         }
3137
3138         mlx4_state = be32_to_cpu(context.flags) >> 28;
3139
3140         qp->state                    = to_ib_qp_state(mlx4_state);
3141         qp_attr->qp_state            = qp->state;
3142         qp_attr->path_mtu            = context.mtu_msgmax >> 5;
3143         qp_attr->path_mig_state      =
3144                 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
3145         qp_attr->qkey                = be32_to_cpu(context.qkey);
3146         qp_attr->rq_psn              = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
3147         qp_attr->sq_psn              = be32_to_cpu(context.next_send_psn) & 0xffffff;
3148         qp_attr->dest_qp_num         = be32_to_cpu(context.remote_qpn) & 0xffffff;
3149         qp_attr->qp_access_flags     =
3150                 to_ib_qp_access_flags(be32_to_cpu(context.params2));
3151
3152         if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
3153                 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
3154                 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
3155                 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
3156                 qp_attr->alt_port_num   = qp_attr->alt_ah_attr.port_num;
3157         }
3158
3159         qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
3160         if (qp_attr->qp_state == IB_QPS_INIT)
3161                 qp_attr->port_num = qp->port;
3162         else
3163                 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
3164
3165         /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
3166         qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
3167
3168         qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
3169
3170         qp_attr->max_dest_rd_atomic =
3171                 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
3172         qp_attr->min_rnr_timer      =
3173                 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
3174         qp_attr->timeout            = context.pri_path.ackto >> 3;
3175         qp_attr->retry_cnt          = (be32_to_cpu(context.params1) >> 16) & 0x7;
3176         qp_attr->rnr_retry          = (be32_to_cpu(context.params1) >> 13) & 0x7;
3177         qp_attr->alt_timeout        = context.alt_path.ackto >> 3;
3178
3179 done:
3180         qp_attr->cur_qp_state        = qp_attr->qp_state;
3181         qp_attr->cap.max_recv_wr     = qp->rq.wqe_cnt;
3182         qp_attr->cap.max_recv_sge    = qp->rq.max_gs;
3183
3184         if (!ibqp->uobject) {
3185                 qp_attr->cap.max_send_wr  = qp->sq.wqe_cnt;
3186                 qp_attr->cap.max_send_sge = qp->sq.max_gs;
3187         } else {
3188                 qp_attr->cap.max_send_wr  = 0;
3189                 qp_attr->cap.max_send_sge = 0;
3190         }
3191
3192         /*
3193          * We don't support inline sends for kernel QPs (yet), and we
3194          * don't know what userspace's value should be.
3195          */
3196         qp_attr->cap.max_inline_data = 0;
3197
3198         qp_init_attr->cap            = qp_attr->cap;
3199
3200         qp_init_attr->create_flags = 0;
3201         if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
3202                 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
3203
3204         if (qp->flags & MLX4_IB_QP_LSO)
3205                 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
3206
3207         if (qp->flags & MLX4_IB_QP_NETIF)
3208                 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP;
3209
3210         qp_init_attr->sq_sig_type =
3211                 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
3212                 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
3213
3214 out:
3215         mutex_unlock(&qp->mutex);
3216         return err;
3217 }
3218