drivers/infiniband/hw/mlx5/qp.c

   1 /*
   2  * Copyright (c) 2013, Mellanox Technologies inc.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/module.h>
  34 #include <rdma/ib_umem.h>
  35 #include "mlx5_ib.h"
  36 #include "user.h"
  37
  38 /* not supported currently */
  39 static int wq_signature;
  40
  41 enum {
  42         MLX5_IB_ACK_REQ_FREQ    = 8,
  43 };
  44
  45 enum {
  46         MLX5_IB_DEFAULT_SCHED_QUEUE     = 0x83,
  47         MLX5_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
  48         MLX5_IB_LINK_TYPE_IB            = 0,
  49         MLX5_IB_LINK_TYPE_ETH           = 1
  50 };
  51
  52 enum {
  53         MLX5_IB_SQ_STRIDE       = 6,
  54         MLX5_IB_CACHE_LINE_SIZE = 64,
  55 };
  56
  57 static const u32 mlx5_ib_opcode[] = {
  58         [IB_WR_SEND]                            = MLX5_OPCODE_SEND,
  59         [IB_WR_SEND_WITH_IMM]                   = MLX5_OPCODE_SEND_IMM,
  60         [IB_WR_RDMA_WRITE]                      = MLX5_OPCODE_RDMA_WRITE,
  61         [IB_WR_RDMA_WRITE_WITH_IMM]             = MLX5_OPCODE_RDMA_WRITE_IMM,
  62         [IB_WR_RDMA_READ]                       = MLX5_OPCODE_RDMA_READ,
  63         [IB_WR_ATOMIC_CMP_AND_SWP]              = MLX5_OPCODE_ATOMIC_CS,
  64         [IB_WR_ATOMIC_FETCH_AND_ADD]            = MLX5_OPCODE_ATOMIC_FA,
  65         [IB_WR_SEND_WITH_INV]                   = MLX5_OPCODE_SEND_INVAL,
  66         [IB_WR_LOCAL_INV]                       = MLX5_OPCODE_UMR,
  67         [IB_WR_FAST_REG_MR]                     = MLX5_OPCODE_UMR,
  68         [IB_WR_MASKED_ATOMIC_CMP_AND_SWP]       = MLX5_OPCODE_ATOMIC_MASKED_CS,
  69         [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD]     = MLX5_OPCODE_ATOMIC_MASKED_FA,
  70         [MLX5_IB_WR_UMR]                        = MLX5_OPCODE_UMR,
  71 };
  72
  73 struct umr_wr {
  74         u64                             virt_addr;
  75         struct ib_pd                   *pd;
  76         unsigned int                    page_shift;
  77         unsigned int                    npages;
  78         u32                             length;
  79         int                             access_flags;
  80         u32                             mkey;
  81 };
  82
  83 static int is_qp0(enum ib_qp_type qp_type)
  84 {
  85         return qp_type == IB_QPT_SMI;
  86 }
  87
  88 static int is_qp1(enum ib_qp_type qp_type)
  89 {
  90         return qp_type == IB_QPT_GSI;
  91 }
  92
  93 static int is_sqp(enum ib_qp_type qp_type)
  94 {
  95         return is_qp0(qp_type) || is_qp1(qp_type);
  96 }
  97
  98 static void *get_wqe(struct mlx5_ib_qp *qp, int offset)
  99 {
 100         return mlx5_buf_offset(&qp->buf, offset);
 101 }
 102
 103 static void *get_recv_wqe(struct mlx5_ib_qp *qp, int n)
 104 {
 105         return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
 106 }
 107
 108 void *mlx5_get_send_wqe(struct mlx5_ib_qp *qp, int n)
 109 {
 110         return get_wqe(qp, qp->sq.offset + (n << MLX5_IB_SQ_STRIDE));
 111 }
 112
 113 static void mlx5_ib_qp_event(struct mlx5_core_qp *qp, int type)
 114 {
 115         struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
 116         struct ib_event event;
 117
 118         if (type == MLX5_EVENT_TYPE_PATH_MIG)
 119                 to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
 120
 121         if (ibqp->event_handler) {
 122                 event.device     = ibqp->device;
 123                 event.element.qp = ibqp;
 124                 switch (type) {
 125                 case MLX5_EVENT_TYPE_PATH_MIG:
 126                         event.event = IB_EVENT_PATH_MIG;
 127                         break;
 128                 case MLX5_EVENT_TYPE_COMM_EST:
 129                         event.event = IB_EVENT_COMM_EST;
 130                         break;
 131                 case MLX5_EVENT_TYPE_SQ_DRAINED:
 132                         event.event = IB_EVENT_SQ_DRAINED;
 133                         break;
 134                 case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
 135                         event.event = IB_EVENT_QP_LAST_WQE_REACHED;
 136                         break;
 137                 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
 138                         event.event = IB_EVENT_QP_FATAL;
 139                         break;
 140                 case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
 141                         event.event = IB_EVENT_PATH_MIG_ERR;
 142                         break;
 143                 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
 144                         event.event = IB_EVENT_QP_REQ_ERR;
 145                         break;
 146                 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
 147                         event.event = IB_EVENT_QP_ACCESS_ERR;
 148                         break;
 149                 default:
 150                         pr_warn("mlx5_ib: Unexpected event type %d on QP %06x\n", type, qp->qpn);
 151                         return;
 152                 }
 153
 154                 ibqp->event_handler(&event, ibqp->qp_context);
 155         }
 156 }
 157
 158 static int set_rq_size(struct mlx5_ib_dev *dev, struct ib_qp_cap *cap,
 159                        int has_rq, struct mlx5_ib_qp *qp, struct mlx5_ib_create_qp *ucmd)
 160 {
 161         int wqe_size;
 162         int wq_size;
 163
 164         /* Sanity check RQ size before proceeding */
 165         if (cap->max_recv_wr  > dev->mdev.caps.max_wqes)
 166                 return -EINVAL;
 167
 168         if (!has_rq) {
 169                 qp->rq.max_gs = 0;
 170                 qp->rq.wqe_cnt = 0;
 171                 qp->rq.wqe_shift = 0;
 172         } else {
 173                 if (ucmd) {
 174                         qp->rq.wqe_cnt = ucmd->rq_wqe_count;
 175                         qp->rq.wqe_shift = ucmd->rq_wqe_shift;
 176                         qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof(struct mlx5_wqe_data_seg) - qp->wq_sig;
 177                         qp->rq.max_post = qp->rq.wqe_cnt;
 178                 } else {
 179                         wqe_size = qp->wq_sig ? sizeof(struct mlx5_wqe_signature_seg) : 0;
 180                         wqe_size += cap->max_recv_sge * sizeof(struct mlx5_wqe_data_seg);
 181                         wqe_size = roundup_pow_of_two(wqe_size);
 182                         wq_size = roundup_pow_of_two(cap->max_recv_wr) * wqe_size;
 183                         wq_size = max_t(int, wq_size, MLX5_SEND_WQE_BB);
 184                         qp->rq.wqe_cnt = wq_size / wqe_size;
 185                         if (wqe_size > dev->mdev.caps.max_rq_desc_sz) {
 186                                 mlx5_ib_dbg(dev, "wqe_size %d, max %d\n",
 187                                             wqe_size,
 188                                             dev->mdev.caps.max_rq_desc_sz);
 189                                 return -EINVAL;
 190                         }
 191                         qp->rq.wqe_shift = ilog2(wqe_size);
 192                         qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof(struct mlx5_wqe_data_seg) - qp->wq_sig;
 193                         qp->rq.max_post = qp->rq.wqe_cnt;
 194                 }
 195         }
 196
 197         return 0;
 198 }
 199
 200 static int sq_overhead(enum ib_qp_type qp_type)
 201 {
 202         int size = 0;
 203
 204         switch (qp_type) {
 205         case IB_QPT_XRC_INI:
 206                 size += sizeof(struct mlx5_wqe_xrc_seg);
 207                 /* fall through */
 208         case IB_QPT_RC:
 209                 size += sizeof(struct mlx5_wqe_ctrl_seg) +
 210                         sizeof(struct mlx5_wqe_atomic_seg) +
 211                         sizeof(struct mlx5_wqe_raddr_seg);
 212                 break;
 213
 214         case IB_QPT_XRC_TGT:
 215                 return 0;
 216
 217         case IB_QPT_UC:
 218                 size += sizeof(struct mlx5_wqe_ctrl_seg) +
 219                         sizeof(struct mlx5_wqe_raddr_seg);
 220                 break;
 221
 222         case IB_QPT_UD:
 223         case IB_QPT_SMI:
 224         case IB_QPT_GSI:
 225                 size += sizeof(struct mlx5_wqe_ctrl_seg) +
 226                         sizeof(struct mlx5_wqe_datagram_seg);
 227                 break;
 228
 229         case MLX5_IB_QPT_REG_UMR:
 230                 size += sizeof(struct mlx5_wqe_ctrl_seg) +
 231                         sizeof(struct mlx5_wqe_umr_ctrl_seg) +
 232                         sizeof(struct mlx5_mkey_seg);
 233                 break;
 234
 235         default:
 236                 return -EINVAL;
 237         }
 238
 239         return size;
 240 }
 241
 242 static int calc_send_wqe(struct ib_qp_init_attr *attr)
 243 {
 244         int inl_size = 0;
 245         int size;
 246
 247         size = sq_overhead(attr->qp_type);
 248         if (size < 0)
 249                 return size;
 250
 251         if (attr->cap.max_inline_data) {
 252                 inl_size = size + sizeof(struct mlx5_wqe_inline_seg) +
 253                         attr->cap.max_inline_data;
 254         }
 255
 256         size += attr->cap.max_send_sge * sizeof(struct mlx5_wqe_data_seg);
 257
 258         return ALIGN(max_t(int, inl_size, size), MLX5_SEND_WQE_BB);
 259 }
 260
 261 static int calc_sq_size(struct mlx5_ib_dev *dev, struct ib_qp_init_attr *attr,
 262                         struct mlx5_ib_qp *qp)
 263 {
 264         int wqe_size;
 265         int wq_size;
 266
 267         if (!attr->cap.max_send_wr)
 268                 return 0;
 269
 270         wqe_size = calc_send_wqe(attr);
 271         mlx5_ib_dbg(dev, "wqe_size %d\n", wqe_size);
 272         if (wqe_size < 0)
 273                 return wqe_size;
 274
 275         if (wqe_size > dev->mdev.caps.max_sq_desc_sz) {
 276                 mlx5_ib_dbg(dev, "wqe_size(%d) > max_sq_desc_sz(%d)\n",
 277                             wqe_size, dev->mdev.caps.max_sq_desc_sz);
 278                 return -EINVAL;
 279         }
 280
 281         qp->max_inline_data = wqe_size - sq_overhead(attr->qp_type) -
 282                 sizeof(struct mlx5_wqe_inline_seg);
 283         attr->cap.max_inline_data = qp->max_inline_data;
 284
 285         wq_size = roundup_pow_of_two(attr->cap.max_send_wr * wqe_size);
 286         qp->sq.wqe_cnt = wq_size / MLX5_SEND_WQE_BB;
 287         if (qp->sq.wqe_cnt > dev->mdev.caps.max_wqes) {
 288                 mlx5_ib_dbg(dev, "wqe count(%d) exceeds limits(%d)\n",
 289                             qp->sq.wqe_cnt, dev->mdev.caps.max_wqes);
 290                 return -ENOMEM;
 291         }
 292         qp->sq.wqe_shift = ilog2(MLX5_SEND_WQE_BB);
 293         qp->sq.max_gs = attr->cap.max_send_sge;
 294         qp->sq.max_post = wq_size / wqe_size;
 295         attr->cap.max_send_wr = qp->sq.max_post;
 296
 297         return wq_size;
 298 }
 299
 300 static int set_user_buf_size(struct mlx5_ib_dev *dev,
 301                             struct mlx5_ib_qp *qp,
 302                             struct mlx5_ib_create_qp *ucmd)
 303 {
 304         int desc_sz = 1 << qp->sq.wqe_shift;
 305
 306         if (desc_sz > dev->mdev.caps.max_sq_desc_sz) {
 307                 mlx5_ib_warn(dev, "desc_sz %d, max_sq_desc_sz %d\n",
 308                              desc_sz, dev->mdev.caps.max_sq_desc_sz);
 309                 return -EINVAL;
 310         }
 311
 312         if (ucmd->sq_wqe_count && ((1 << ilog2(ucmd->sq_wqe_count)) != ucmd->sq_wqe_count)) {
 313                 mlx5_ib_warn(dev, "sq_wqe_count %d, sq_wqe_count %d\n",
 314                              ucmd->sq_wqe_count, ucmd->sq_wqe_count);
 315                 return -EINVAL;
 316         }
 317
 318         qp->sq.wqe_cnt = ucmd->sq_wqe_count;
 319
 320         if (qp->sq.wqe_cnt > dev->mdev.caps.max_wqes) {
 321                 mlx5_ib_warn(dev, "wqe_cnt %d, max_wqes %d\n",
 322                              qp->sq.wqe_cnt, dev->mdev.caps.max_wqes);
 323                 return -EINVAL;
 324         }
 325
 326         qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
 327                 (qp->sq.wqe_cnt << 6);
 328
 329         return 0;
 330 }
 331
 332 static int qp_has_rq(struct ib_qp_init_attr *attr)
 333 {
 334         if (attr->qp_type == IB_QPT_XRC_INI ||
 335             attr->qp_type == IB_QPT_XRC_TGT || attr->srq ||
 336             attr->qp_type == MLX5_IB_QPT_REG_UMR ||
 337             !attr->cap.max_recv_wr)
 338                 return 0;
 339
 340         return 1;
 341 }
 342
 343 static int alloc_high_class_uuar(struct mlx5_uuar_info *uuari)
 344 {
 345         int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE;
 346         int start_uuar;
 347         int i;
 348
 349         start_uuar = nuuars - uuari->num_low_latency_uuars;
 350         for (i = start_uuar; i < nuuars; i++) {
 351                 if (!test_bit(i, uuari->bitmap)) {
 352                         set_bit(i, uuari->bitmap);
 353                         uuari->count[i]++;
 354                         return i;
 355                 }
 356         }
 357
 358         return -ENOMEM;
 359 }
 360
 361 static int alloc_med_class_uuar(struct mlx5_uuar_info *uuari)
 362 {
 363         int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE;
 364         int minidx = 1;
 365         int uuarn;
 366         int end;
 367         int i;
 368
 369         end = nuuars - uuari->num_low_latency_uuars;
 370
 371         for (i = 1; i < end; i++) {
 372                 uuarn = i & 3;
 373                 if (uuarn == 2 || uuarn == 3)
 374                         continue;
 375
 376                 if (uuari->count[i] < uuari->count[minidx])
 377                         minidx = i;
 378         }
 379
 380         uuari->count[minidx]++;
 381         return minidx;
 382 }
 383
 384 static int alloc_uuar(struct mlx5_uuar_info *uuari,
 385                       enum mlx5_ib_latency_class lat)
 386 {
 387         int uuarn = -EINVAL;
 388
 389         mutex_lock(&uuari->lock);
 390         switch (lat) {
 391         case MLX5_IB_LATENCY_CLASS_LOW:
 392                 uuarn = 0;
 393                 uuari->count[uuarn]++;
 394                 break;
 395
 396         case MLX5_IB_LATENCY_CLASS_MEDIUM:
 397                 uuarn = alloc_med_class_uuar(uuari);
 398                 break;
 399
 400         case MLX5_IB_LATENCY_CLASS_HIGH:
 401                 uuarn = alloc_high_class_uuar(uuari);
 402                 break;
 403
 404         case MLX5_IB_LATENCY_CLASS_FAST_PATH:
 405                 uuarn = 2;
 406                 break;
 407         }
 408         mutex_unlock(&uuari->lock);
 409
 410         return uuarn;
 411 }
 412
 413 static void free_med_class_uuar(struct mlx5_uuar_info *uuari, int uuarn)
 414 {
 415         clear_bit(uuarn, uuari->bitmap);
 416         --uuari->count[uuarn];
 417 }
 418
 419 static void free_high_class_uuar(struct mlx5_uuar_info *uuari, int uuarn)
 420 {
 421         clear_bit(uuarn, uuari->bitmap);
 422         --uuari->count[uuarn];
 423 }
 424
 425 static void free_uuar(struct mlx5_uuar_info *uuari, int uuarn)
 426 {
 427         int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE;
 428         int high_uuar = nuuars - uuari->num_low_latency_uuars;
 429
 430         mutex_lock(&uuari->lock);
 431         if (uuarn == 0) {
 432                 --uuari->count[uuarn];
 433                 goto out;
 434         }
 435
 436         if (uuarn < high_uuar) {
 437                 free_med_class_uuar(uuari, uuarn);
 438                 goto out;
 439         }
 440
 441         free_high_class_uuar(uuari, uuarn);
 442
 443 out:
 444         mutex_unlock(&uuari->lock);
 445 }
 446
 447 static enum mlx5_qp_state to_mlx5_state(enum ib_qp_state state)
 448 {
 449         switch (state) {
 450         case IB_QPS_RESET:      return MLX5_QP_STATE_RST;
 451         case IB_QPS_INIT:       return MLX5_QP_STATE_INIT;
 452         case IB_QPS_RTR:        return MLX5_QP_STATE_RTR;
 453         case IB_QPS_RTS:        return MLX5_QP_STATE_RTS;
 454         case IB_QPS_SQD:        return MLX5_QP_STATE_SQD;
 455         case IB_QPS_SQE:        return MLX5_QP_STATE_SQER;
 456         case IB_QPS_ERR:        return MLX5_QP_STATE_ERR;
 457         default:                return -1;
 458         }
 459 }
 460
 461 static int to_mlx5_st(enum ib_qp_type type)
 462 {
 463         switch (type) {
 464         case IB_QPT_RC:                 return MLX5_QP_ST_RC;
 465         case IB_QPT_UC:                 return MLX5_QP_ST_UC;
 466         case IB_QPT_UD:                 return MLX5_QP_ST_UD;
 467         case MLX5_IB_QPT_REG_UMR:       return MLX5_QP_ST_REG_UMR;
 468         case IB_QPT_XRC_INI:
 469         case IB_QPT_XRC_TGT:            return MLX5_QP_ST_XRC;
 470         case IB_QPT_SMI:                return MLX5_QP_ST_QP0;
 471         case IB_QPT_GSI:                return MLX5_QP_ST_QP1;
 472         case IB_QPT_RAW_IPV6:           return MLX5_QP_ST_RAW_IPV6;
 473         case IB_QPT_RAW_ETHERTYPE:      return MLX5_QP_ST_RAW_ETHERTYPE;
 474         case IB_QPT_RAW_PACKET:
 475         case IB_QPT_MAX:
 476         default:                return -EINVAL;
 477         }
 478 }
 479
 480 static int uuarn_to_uar_index(struct mlx5_uuar_info *uuari, int uuarn)
 481 {
 482         return uuari->uars[uuarn / MLX5_BF_REGS_PER_PAGE].index;
 483 }
 484
 485 static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
 486                           struct mlx5_ib_qp *qp, struct ib_udata *udata,
 487                           struct mlx5_create_qp_mbox_in **in,
 488                           struct mlx5_ib_create_qp_resp *resp, int *inlen)
 489 {
 490         struct mlx5_ib_ucontext *context;
 491         struct mlx5_ib_create_qp ucmd;
 492         int page_shift;
 493         int uar_index;
 494         int npages;
 495         u32 offset;
 496         int uuarn;
 497         int ncont;
 498         int err;
 499
 500         err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
 501         if (err) {
 502                 mlx5_ib_dbg(dev, "copy failed\n");
 503                 return err;
 504         }
 505
 506         context = to_mucontext(pd->uobject->context);
 507         /*
 508          * TBD: should come from the verbs when we have the API
 509          */
 510         uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_HIGH);
 511         if (uuarn < 0) {
 512                 mlx5_ib_dbg(dev, "failed to allocate low latency UUAR\n");
 513                 mlx5_ib_dbg(dev, "reverting to high latency\n");
 514                 uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_LOW);
 515                 if (uuarn < 0) {
 516                         mlx5_ib_dbg(dev, "uuar allocation failed\n");
 517                         return uuarn;
 518                 }
 519         }
 520
 521         uar_index = uuarn_to_uar_index(&context->uuari, uuarn);
 522         mlx5_ib_dbg(dev, "uuarn 0x%x, uar_index 0x%x\n", uuarn, uar_index);
 523
 524         err = set_user_buf_size(dev, qp, &ucmd);
 525         if (err)
 526                 goto err_uuar;
 527
 528         qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
 529                                qp->buf_size, 0, 0);
 530         if (IS_ERR(qp->umem)) {
 531                 mlx5_ib_dbg(dev, "umem_get failed\n");
 532                 err = PTR_ERR(qp->umem);
 533                 goto err_uuar;
 534         }
 535
 536         mlx5_ib_cont_pages(qp->umem, ucmd.buf_addr, &npages, &page_shift,
 537                            &ncont, NULL);
 538         err = mlx5_ib_get_buf_offset(ucmd.buf_addr, page_shift, &offset);
 539         if (err) {
 540                 mlx5_ib_warn(dev, "bad offset\n");
 541                 goto err_umem;
 542         }
 543         mlx5_ib_dbg(dev, "addr 0x%llx, size %d, npages %d, page_shift %d, ncont %d, offset %d\n",
 544                     ucmd.buf_addr, qp->buf_size, npages, page_shift, ncont, offset);
 545
 546         *inlen = sizeof(**in) + sizeof(*(*in)->pas) * ncont;
 547         *in = mlx5_vzalloc(*inlen);
 548         if (!*in) {
 549                 err = -ENOMEM;
 550                 goto err_umem;
 551         }
 552         mlx5_ib_populate_pas(dev, qp->umem, page_shift, (*in)->pas, 0);
 553         (*in)->ctx.log_pg_sz_remote_qpn =
 554                 cpu_to_be32((page_shift - PAGE_SHIFT) << 24);
 555         (*in)->ctx.params2 = cpu_to_be32(offset << 6);
 556
 557         (*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index);
 558         resp->uuar_index = uuarn;
 559         qp->uuarn = uuarn;
 560
 561         err = mlx5_ib_db_map_user(context, ucmd.db_addr, &qp->db);
 562         if (err) {
 563                 mlx5_ib_dbg(dev, "map failed\n");
 564                 goto err_free;
 565         }
 566
 567         err = ib_copy_to_udata(udata, resp, sizeof(*resp));
 568         if (err) {
 569                 mlx5_ib_dbg(dev, "copy failed\n");
 570                 goto err_unmap;
 571         }
 572         qp->create_type = MLX5_QP_USER;
 573
 574         return 0;
 575
 576 err_unmap:
 577         mlx5_ib_db_unmap_user(context, &qp->db);
 578
 579 err_free:
 580         mlx5_vfree(*in);
 581
 582 err_umem:
 583         ib_umem_release(qp->umem);
 584
 585 err_uuar:
 586         free_uuar(&context->uuari, uuarn);
 587         return err;
 588 }
 589
 590 static void destroy_qp_user(struct ib_pd *pd, struct mlx5_ib_qp *qp)
 591 {
 592         struct mlx5_ib_ucontext *context;
 593
 594         context = to_mucontext(pd->uobject->context);
 595         mlx5_ib_db_unmap_user(context, &qp->db);
 596         ib_umem_release(qp->umem);
 597         free_uuar(&context->uuari, qp->uuarn);
 598 }
 599
 600 static int create_kernel_qp(struct mlx5_ib_dev *dev,
 601                             struct ib_qp_init_attr *init_attr,
 602                             struct mlx5_ib_qp *qp,
 603                             struct mlx5_create_qp_mbox_in **in, int *inlen)
 604 {
 605         enum mlx5_ib_latency_class lc = MLX5_IB_LATENCY_CLASS_LOW;
 606         struct mlx5_uuar_info *uuari;
 607         int uar_index;
 608         int uuarn;
 609         int err;
 610
 611         uuari = &dev->mdev.priv.uuari;
 612         if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
 613                 qp->flags |= MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK;
 614
 615         if (init_attr->qp_type == MLX5_IB_QPT_REG_UMR)
 616                 lc = MLX5_IB_LATENCY_CLASS_FAST_PATH;
 617
 618         uuarn = alloc_uuar(uuari, lc);
 619         if (uuarn < 0) {
 620                 mlx5_ib_dbg(dev, "\n");
 621                 return -ENOMEM;
 622         }
 623
 624         qp->bf = &uuari->bfs[uuarn];
 625         uar_index = qp->bf->uar->index;
 626
 627         err = calc_sq_size(dev, init_attr, qp);
 628         if (err < 0) {
 629                 mlx5_ib_dbg(dev, "err %d\n", err);
 630                 goto err_uuar;
 631         }
 632
 633         qp->rq.offset = 0;
 634         qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
 635         qp->buf_size = err + (qp->rq.wqe_cnt << qp->rq.wqe_shift);
 636
 637         err = mlx5_buf_alloc(&dev->mdev, qp->buf_size, PAGE_SIZE * 2, &qp->buf);
 638         if (err) {
 639                 mlx5_ib_dbg(dev, "err %d\n", err);
 640                 goto err_uuar;
 641         }
 642
 643         qp->sq.qend = mlx5_get_send_wqe(qp, qp->sq.wqe_cnt);
 644         *inlen = sizeof(**in) + sizeof(*(*in)->pas) * qp->buf.npages;
 645         *in = mlx5_vzalloc(*inlen);
 646         if (!*in) {
 647                 err = -ENOMEM;
 648                 goto err_buf;
 649         }
 650         (*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index);
 651         (*in)->ctx.log_pg_sz_remote_qpn = cpu_to_be32((qp->buf.page_shift - PAGE_SHIFT) << 24);
 652         /* Set "fast registration enabled" for all kernel QPs */
 653         (*in)->ctx.params1 |= cpu_to_be32(1 << 11);
 654         (*in)->ctx.sq_crq_size |= cpu_to_be16(1 << 4);
 655
 656         mlx5_fill_page_array(&qp->buf, (*in)->pas);
 657
 658         err = mlx5_db_alloc(&dev->mdev, &qp->db);
 659         if (err) {
 660                 mlx5_ib_dbg(dev, "err %d\n", err);
 661                 goto err_free;
 662         }
 663
 664         qp->db.db[0] = 0;
 665         qp->db.db[1] = 0;
 666
 667         qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wrid), GFP_KERNEL);
 668         qp->sq.wr_data = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wr_data), GFP_KERNEL);
 669         qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof(*qp->rq.wrid), GFP_KERNEL);
 670         qp->sq.w_list = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.w_list), GFP_KERNEL);
 671         qp->sq.wqe_head = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wqe_head), GFP_KERNEL);
 672
 673         if (!qp->sq.wrid || !qp->sq.wr_data || !qp->rq.wrid ||
 674             !qp->sq.w_list || !qp->sq.wqe_head) {
 675                 err = -ENOMEM;
 676                 goto err_wrid;
 677         }
 678         qp->create_type = MLX5_QP_KERNEL;
 679
 680         return 0;
 681
 682 err_wrid:
 683         mlx5_db_free(&dev->mdev, &qp->db);
 684         kfree(qp->sq.wqe_head);
 685         kfree(qp->sq.w_list);
 686         kfree(qp->sq.wrid);
 687         kfree(qp->sq.wr_data);
 688         kfree(qp->rq.wrid);
 689
 690 err_free:
 691         mlx5_vfree(*in);
 692
 693 err_buf:
 694         mlx5_buf_free(&dev->mdev, &qp->buf);
 695
 696 err_uuar:
 697         free_uuar(&dev->mdev.priv.uuari, uuarn);
 698         return err;
 699 }
 700
 701 static void destroy_qp_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp)
 702 {
 703         mlx5_db_free(&dev->mdev, &qp->db);
 704         kfree(qp->sq.wqe_head);
 705         kfree(qp->sq.w_list);
 706         kfree(qp->sq.wrid);
 707         kfree(qp->sq.wr_data);
 708         kfree(qp->rq.wrid);
 709         mlx5_buf_free(&dev->mdev, &qp->buf);
 710         free_uuar(&dev->mdev.priv.uuari, qp->bf->uuarn);
 711 }
 712
 713 static __be32 get_rx_type(struct mlx5_ib_qp *qp, struct ib_qp_init_attr *attr)
 714 {
 715         if (attr->srq || (attr->qp_type == IB_QPT_XRC_TGT) ||
 716             (attr->qp_type == IB_QPT_XRC_INI))
 717                 return cpu_to_be32(MLX5_SRQ_RQ);
 718         else if (!qp->has_rq)
 719                 return cpu_to_be32(MLX5_ZERO_LEN_RQ);
 720         else
 721                 return cpu_to_be32(MLX5_NON_ZERO_RQ);
 722 }
 723
 724 static int is_connected(enum ib_qp_type qp_type)
 725 {
 726         if (qp_type == IB_QPT_RC || qp_type == IB_QPT_UC)
 727                 return 1;
 728
 729         return 0;
 730 }
 731
 732 static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
 733                             struct ib_qp_init_attr *init_attr,
 734                             struct ib_udata *udata, struct mlx5_ib_qp *qp)
 735 {
 736         struct mlx5_ib_resources *devr = &dev->devr;
 737         struct mlx5_ib_create_qp_resp resp;
 738         struct mlx5_create_qp_mbox_in *in;
 739         struct mlx5_ib_create_qp ucmd;
 740         int inlen = sizeof(*in);
 741         int err;
 742
 743         mutex_init(&qp->mutex);
 744         spin_lock_init(&qp->sq.lock);
 745         spin_lock_init(&qp->rq.lock);
 746
 747         if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
 748                 qp->sq_signal_bits = MLX5_WQE_CTRL_CQ_UPDATE;
 749
 750         if (pd && pd->uobject) {
 751                 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
 752                         mlx5_ib_dbg(dev, "copy failed\n");
 753                         return -EFAULT;
 754                 }
 755
 756                 qp->wq_sig = !!(ucmd.flags & MLX5_QP_FLAG_SIGNATURE);
 757                 qp->scat_cqe = !!(ucmd.flags & MLX5_QP_FLAG_SCATTER_CQE);
 758         } else {
 759                 qp->wq_sig = !!wq_signature;
 760         }
 761
 762         qp->has_rq = qp_has_rq(init_attr);
 763         err = set_rq_size(dev, &init_attr->cap, qp->has_rq,
 764                           qp, (pd && pd->uobject) ? &ucmd : NULL);
 765         if (err) {
 766                 mlx5_ib_dbg(dev, "err %d\n", err);
 767                 return err;
 768         }
 769
 770         if (pd) {
 771                 if (pd->uobject) {
 772                         mlx5_ib_dbg(dev, "requested sq_wqe_count (%d)\n", ucmd.sq_wqe_count);
 773                         if (ucmd.rq_wqe_shift != qp->rq.wqe_shift ||
 774                             ucmd.rq_wqe_count != qp->rq.wqe_cnt) {
 775                                 mlx5_ib_dbg(dev, "invalid rq params\n");
 776                                 return -EINVAL;
 777                         }
 778                         if (ucmd.sq_wqe_count > dev->mdev.caps.max_wqes) {
 779                                 mlx5_ib_dbg(dev, "requested sq_wqe_count (%d) > max allowed (%d)\n",
 780                                             ucmd.sq_wqe_count, dev->mdev.caps.max_wqes);
 781                                 return -EINVAL;
 782                         }
 783                         err = create_user_qp(dev, pd, qp, udata, &in, &resp, &inlen);
 784                         if (err)
 785                                 mlx5_ib_dbg(dev, "err %d\n", err);
 786                 } else {
 787                         err = create_kernel_qp(dev, init_attr, qp, &in, &inlen);
 788                         if (err)
 789                                 mlx5_ib_dbg(dev, "err %d\n", err);
 790                         else
 791                                 qp->pa_lkey = to_mpd(pd)->pa_lkey;
 792                 }
 793
 794                 if (err)
 795                         return err;
 796         } else {
 797                 in = mlx5_vzalloc(sizeof(*in));
 798                 if (!in)
 799                         return -ENOMEM;
 800
 801                 qp->create_type = MLX5_QP_EMPTY;
 802         }
 803
 804         if (is_sqp(init_attr->qp_type))
 805                 qp->port = init_attr->port_num;
 806
 807         in->ctx.flags = cpu_to_be32(to_mlx5_st(init_attr->qp_type) << 16 |
 808                                     MLX5_QP_PM_MIGRATED << 11);
 809
 810         if (init_attr->qp_type != MLX5_IB_QPT_REG_UMR)
 811                 in->ctx.flags_pd = cpu_to_be32(to_mpd(pd ? pd : devr->p0)->pdn);
 812         else
 813                 in->ctx.flags_pd = cpu_to_be32(MLX5_QP_LAT_SENSITIVE);
 814
 815         if (qp->wq_sig)
 816                 in->ctx.flags_pd |= cpu_to_be32(MLX5_QP_ENABLE_SIG);
 817
 818         if (qp->scat_cqe && is_connected(init_attr->qp_type)) {
 819                 int rcqe_sz;
 820                 int scqe_sz;
 821
 822                 rcqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->recv_cq);
 823                 scqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->send_cq);
 824
 825                 if (rcqe_sz == 128)
 826                         in->ctx.cs_res = MLX5_RES_SCAT_DATA64_CQE;
 827                 else
 828                         in->ctx.cs_res = MLX5_RES_SCAT_DATA32_CQE;
 829
 830                 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) {
 831                         if (scqe_sz == 128)
 832                                 in->ctx.cs_req = MLX5_REQ_SCAT_DATA64_CQE;
 833                         else
 834                                 in->ctx.cs_req = MLX5_REQ_SCAT_DATA32_CQE;
 835                 }
 836         }
 837
 838         if (qp->rq.wqe_cnt) {
 839                 in->ctx.rq_size_stride = (qp->rq.wqe_shift - 4);
 840                 in->ctx.rq_size_stride |= ilog2(qp->rq.wqe_cnt) << 3;
 841         }
 842
 843         in->ctx.rq_type_srqn = get_rx_type(qp, init_attr);
 844
 845         if (qp->sq.wqe_cnt)
 846                 in->ctx.sq_crq_size |= cpu_to_be16(ilog2(qp->sq.wqe_cnt) << 11);
 847         else
 848                 in->ctx.sq_crq_size |= cpu_to_be16(0x8000);
 849
 850         /* Set default resources */
 851         switch (init_attr->qp_type) {
 852         case IB_QPT_XRC_TGT:
 853                 in->ctx.cqn_recv = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn);
 854                 in->ctx.cqn_send = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn);
 855                 in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn);
 856                 in->ctx.xrcd = cpu_to_be32(to_mxrcd(init_attr->xrcd)->xrcdn);
 857                 break;
 858         case IB_QPT_XRC_INI:
 859                 in->ctx.cqn_recv = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn);
 860                 in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x1)->xrcdn);
 861                 in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn);
 862                 break;
 863         default:
 864                 if (init_attr->srq) {
 865                         in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x0)->xrcdn);
 866                         in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(init_attr->srq)->msrq.srqn);
 867                 } else {
 868                         in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x1)->xrcdn);
 869                         in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn);
 870                 }
 871         }
 872
 873         if (init_attr->send_cq)
 874                 in->ctx.cqn_send = cpu_to_be32(to_mcq(init_attr->send_cq)->mcq.cqn);
 875
 876         if (init_attr->recv_cq)
 877                 in->ctx.cqn_recv = cpu_to_be32(to_mcq(init_attr->recv_cq)->mcq.cqn);
 878
 879         in->ctx.db_rec_addr = cpu_to_be64(qp->db.dma);
 880
 881         err = mlx5_core_create_qp(&dev->mdev, &qp->mqp, in, inlen);
 882         if (err) {
 883                 mlx5_ib_dbg(dev, "create qp failed\n");
 884                 goto err_create;
 885         }
 886
 887         mlx5_vfree(in);
 888         /* Hardware wants QPN written in big-endian order (after
 889          * shifting) for send doorbell.  Precompute this value to save
 890          * a little bit when posting sends.
 891          */
 892         qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
 893
 894         qp->mqp.event = mlx5_ib_qp_event;
 895
 896         return 0;
 897
 898 err_create:
 899         if (qp->create_type == MLX5_QP_USER)
 900                 destroy_qp_user(pd, qp);
 901         else if (qp->create_type == MLX5_QP_KERNEL)
 902                 destroy_qp_kernel(dev, qp);
 903
 904         mlx5_vfree(in);
 905         return err;
 906 }
 907
 908 static void mlx5_ib_lock_cqs(struct mlx5_ib_cq *send_cq, struct mlx5_ib_cq *recv_cq)
 909         __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
 910 {
 911         if (send_cq) {
 912                 if (recv_cq) {
 913                         if (send_cq->mcq.cqn < recv_cq->mcq.cqn)  {
 914                                 spin_lock_irq(&send_cq->lock);
 915                                 spin_lock_nested(&recv_cq->lock,
 916                                                  SINGLE_DEPTH_NESTING);
 917                         } else if (send_cq->mcq.cqn == recv_cq->mcq.cqn) {
 918                                 spin_lock_irq(&send_cq->lock);
 919                                 __acquire(&recv_cq->lock);
 920                         } else {
 921                                 spin_lock_irq(&recv_cq->lock);
 922                                 spin_lock_nested(&send_cq->lock,
 923                                                  SINGLE_DEPTH_NESTING);
 924                         }
 925                 } else {
 926                         spin_lock_irq(&send_cq->lock);
 927                 }
 928         } else if (recv_cq) {
 929                 spin_lock_irq(&recv_cq->lock);
 930         }
 931 }
 932
 933 static void mlx5_ib_unlock_cqs(struct mlx5_ib_cq *send_cq, struct mlx5_ib_cq *recv_cq)
 934         __releases(&send_cq->lock) __releases(&recv_cq->lock)
 935 {
 936         if (send_cq) {
 937                 if (recv_cq) {
 938                         if (send_cq->mcq.cqn < recv_cq->mcq.cqn)  {
 939                                 spin_unlock(&recv_cq->lock);
 940                                 spin_unlock_irq(&send_cq->lock);
 941                         } else if (send_cq->mcq.cqn == recv_cq->mcq.cqn) {
 942                                 __release(&recv_cq->lock);
 943                                 spin_unlock_irq(&send_cq->lock);
 944                         } else {
 945                                 spin_unlock(&send_cq->lock);
 946                                 spin_unlock_irq(&recv_cq->lock);
 947                         }
 948                 } else {
 949                         spin_unlock_irq(&send_cq->lock);
 950                 }
 951         } else if (recv_cq) {
 952                 spin_unlock_irq(&recv_cq->lock);
 953         }
 954 }
 955
 956 static struct mlx5_ib_pd *get_pd(struct mlx5_ib_qp *qp)
 957 {
 958         return to_mpd(qp->ibqp.pd);
 959 }
 960
 961 static void get_cqs(struct mlx5_ib_qp *qp,
 962                     struct mlx5_ib_cq **send_cq, struct mlx5_ib_cq **recv_cq)
 963 {
 964         switch (qp->ibqp.qp_type) {
 965         case IB_QPT_XRC_TGT:
 966                 *send_cq = NULL;
 967                 *recv_cq = NULL;
 968                 break;
 969         case MLX5_IB_QPT_REG_UMR:
 970         case IB_QPT_XRC_INI:
 971                 *send_cq = to_mcq(qp->ibqp.send_cq);
 972                 *recv_cq = NULL;
 973                 break;
 974
 975         case IB_QPT_SMI:
 976         case IB_QPT_GSI:
 977         case IB_QPT_RC:
 978         case IB_QPT_UC:
 979         case IB_QPT_UD:
 980         case IB_QPT_RAW_IPV6:
 981         case IB_QPT_RAW_ETHERTYPE:
 982                 *send_cq = to_mcq(qp->ibqp.send_cq);
 983                 *recv_cq = to_mcq(qp->ibqp.recv_cq);
 984                 break;
 985
 986         case IB_QPT_RAW_PACKET:
 987         case IB_QPT_MAX:
 988         default:
 989                 *send_cq = NULL;
 990                 *recv_cq = NULL;
 991                 break;
 992         }
 993 }
 994
 995 static void destroy_qp_common(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp)
 996 {
 997         struct mlx5_ib_cq *send_cq, *recv_cq;
 998         struct mlx5_modify_qp_mbox_in *in;
 999         int err;
1000
1001         in = kzalloc(sizeof(*in), GFP_KERNEL);
1002         if (!in)
1003                 return;
1004         if (qp->state != IB_QPS_RESET)
1005                 if (mlx5_core_qp_modify(&dev->mdev, to_mlx5_state(qp->state),
1006                                         MLX5_QP_STATE_RST, in, sizeof(*in), &qp->mqp))
1007                         mlx5_ib_warn(dev, "mlx5_ib: modify QP %06x to RESET failed\n",
1008                                      qp->mqp.qpn);
1009
1010         get_cqs(qp, &send_cq, &recv_cq);
1011
1012         if (qp->create_type == MLX5_QP_KERNEL) {
1013                 mlx5_ib_lock_cqs(send_cq, recv_cq);
1014                 __mlx5_ib_cq_clean(recv_cq, qp->mqp.qpn,
1015                                    qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
1016                 if (send_cq != recv_cq)
1017                         __mlx5_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1018                 mlx5_ib_unlock_cqs(send_cq, recv_cq);
1019         }
1020
1021         err = mlx5_core_destroy_qp(&dev->mdev, &qp->mqp);
1022         if (err)
1023                 mlx5_ib_warn(dev, "failed to destroy QP 0x%x\n", qp->mqp.qpn);
1024         kfree(in);
1025
1026
1027         if (qp->create_type == MLX5_QP_KERNEL)
1028                 destroy_qp_kernel(dev, qp);
1029         else if (qp->create_type == MLX5_QP_USER)
1030                 destroy_qp_user(&get_pd(qp)->ibpd, qp);
1031 }
1032
1033 static const char *ib_qp_type_str(enum ib_qp_type type)
1034 {
1035         switch (type) {
1036         case IB_QPT_SMI:
1037                 return "IB_QPT_SMI";
1038         case IB_QPT_GSI:
1039                 return "IB_QPT_GSI";
1040         case IB_QPT_RC:
1041                 return "IB_QPT_RC";
1042         case IB_QPT_UC:
1043                 return "IB_QPT_UC";
1044         case IB_QPT_UD:
1045                 return "IB_QPT_UD";
1046         case IB_QPT_RAW_IPV6:
1047                 return "IB_QPT_RAW_IPV6";
1048         case IB_QPT_RAW_ETHERTYPE:
1049                 return "IB_QPT_RAW_ETHERTYPE";
1050         case IB_QPT_XRC_INI:
1051                 return "IB_QPT_XRC_INI";
1052         case IB_QPT_XRC_TGT:
1053                 return "IB_QPT_XRC_TGT";
1054         case IB_QPT_RAW_PACKET:
1055                 return "IB_QPT_RAW_PACKET";
1056         case MLX5_IB_QPT_REG_UMR:
1057                 return "MLX5_IB_QPT_REG_UMR";
1058         case IB_QPT_MAX:
1059         default:
1060                 return "Invalid QP type";
1061         }
1062 }
1063
1064 struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd,
1065                                 struct ib_qp_init_attr *init_attr,
1066                                 struct ib_udata *udata)
1067 {
1068         struct mlx5_ib_dev *dev;
1069         struct mlx5_ib_qp *qp;
1070         u16 xrcdn = 0;
1071         int err;
1072
1073         if (pd) {
1074                 dev = to_mdev(pd->device);
1075         } else {
1076                 /* being cautious here */
1077                 if (init_attr->qp_type != IB_QPT_XRC_TGT &&
1078                     init_attr->qp_type != MLX5_IB_QPT_REG_UMR) {
1079                         pr_warn("%s: no PD for transport %s\n", __func__,
1080                                 ib_qp_type_str(init_attr->qp_type));
1081                         return ERR_PTR(-EINVAL);
1082                 }
1083                 dev = to_mdev(to_mxrcd(init_attr->xrcd)->ibxrcd.device);
1084         }
1085
1086         switch (init_attr->qp_type) {
1087         case IB_QPT_XRC_TGT:
1088         case IB_QPT_XRC_INI:
1089                 if (!(dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_XRC)) {
1090                         mlx5_ib_dbg(dev, "XRC not supported\n");
1091                         return ERR_PTR(-ENOSYS);
1092                 }
1093                 init_attr->recv_cq = NULL;
1094                 if (init_attr->qp_type == IB_QPT_XRC_TGT) {
1095                         xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1096                         init_attr->send_cq = NULL;
1097                 }
1098
1099                 /* fall through */
1100         case IB_QPT_RC:
1101         case IB_QPT_UC:
1102         case IB_QPT_UD:
1103         case IB_QPT_SMI:
1104         case IB_QPT_GSI:
1105         case MLX5_IB_QPT_REG_UMR:
1106                 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
1107                 if (!qp)
1108                         return ERR_PTR(-ENOMEM);
1109
1110                 err = create_qp_common(dev, pd, init_attr, udata, qp);
1111                 if (err) {
1112                         mlx5_ib_dbg(dev, "create_qp_common failed\n");
1113                         kfree(qp);
1114                         return ERR_PTR(err);
1115                 }
1116
1117                 if (is_qp0(init_attr->qp_type))
1118                         qp->ibqp.qp_num = 0;
1119                 else if (is_qp1(init_attr->qp_type))
1120                         qp->ibqp.qp_num = 1;
1121                 else
1122                         qp->ibqp.qp_num = qp->mqp.qpn;
1123
1124                 mlx5_ib_dbg(dev, "ib qpnum 0x%x, mlx qpn 0x%x, rcqn 0x%x, scqn 0x%x\n",
1125                             qp->ibqp.qp_num, qp->mqp.qpn, to_mcq(init_attr->recv_cq)->mcq.cqn,
1126                             to_mcq(init_attr->send_cq)->mcq.cqn);
1127
1128                 qp->xrcdn = xrcdn;
1129
1130                 break;
1131
1132         case IB_QPT_RAW_IPV6:
1133         case IB_QPT_RAW_ETHERTYPE:
1134         case IB_QPT_RAW_PACKET:
1135         case IB_QPT_MAX:
1136         default:
1137                 mlx5_ib_dbg(dev, "unsupported qp type %d\n",
1138                             init_attr->qp_type);
1139                 /* Don't support raw QPs */
1140                 return ERR_PTR(-EINVAL);
1141         }
1142
1143         return &qp->ibqp;
1144 }
1145
1146 int mlx5_ib_destroy_qp(struct ib_qp *qp)
1147 {
1148         struct mlx5_ib_dev *dev = to_mdev(qp->device);
1149         struct mlx5_ib_qp *mqp = to_mqp(qp);
1150
1151         destroy_qp_common(dev, mqp);
1152
1153         kfree(mqp);
1154
1155         return 0;
1156 }
1157
1158 static __be32 to_mlx5_access_flags(struct mlx5_ib_qp *qp, const struct ib_qp_attr *attr,
1159                                    int attr_mask)
1160 {
1161         u32 hw_access_flags = 0;
1162         u8 dest_rd_atomic;
1163         u32 access_flags;
1164
1165         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1166                 dest_rd_atomic = attr->max_dest_rd_atomic;
1167         else
1168                 dest_rd_atomic = qp->resp_depth;
1169
1170         if (attr_mask & IB_QP_ACCESS_FLAGS)
1171                 access_flags = attr->qp_access_flags;
1172         else
1173                 access_flags = qp->atomic_rd_en;
1174
1175         if (!dest_rd_atomic)
1176                 access_flags &= IB_ACCESS_REMOTE_WRITE;
1177
1178         if (access_flags & IB_ACCESS_REMOTE_READ)
1179                 hw_access_flags |= MLX5_QP_BIT_RRE;
1180         if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1181                 hw_access_flags |= (MLX5_QP_BIT_RAE | MLX5_ATOMIC_MODE_CX);
1182         if (access_flags & IB_ACCESS_REMOTE_WRITE)
1183                 hw_access_flags |= MLX5_QP_BIT_RWE;
1184
1185         return cpu_to_be32(hw_access_flags);
1186 }
1187
1188 enum {
1189         MLX5_PATH_FLAG_FL       = 1 << 0,
1190         MLX5_PATH_FLAG_FREE_AR  = 1 << 1,
1191         MLX5_PATH_FLAG_COUNTER  = 1 << 2,
1192 };
1193
1194 static int ib_rate_to_mlx5(struct mlx5_ib_dev *dev, u8 rate)
1195 {
1196         if (rate == IB_RATE_PORT_CURRENT) {
1197                 return 0;
1198         } else if (rate < IB_RATE_2_5_GBPS || rate > IB_RATE_300_GBPS) {
1199                 return -EINVAL;
1200         } else {
1201                 while (rate != IB_RATE_2_5_GBPS &&
1202                        !(1 << (rate + MLX5_STAT_RATE_OFFSET) &
1203                          dev->mdev.caps.stat_rate_support))
1204                         --rate;
1205         }
1206
1207         return rate + MLX5_STAT_RATE_OFFSET;
1208 }
1209
1210 static int mlx5_set_path(struct mlx5_ib_dev *dev, const struct ib_ah_attr *ah,
1211                          struct mlx5_qp_path *path, u8 port, int attr_mask,
1212                          u32 path_flags, const struct ib_qp_attr *attr)
1213 {
1214         int err;
1215
1216         path->fl = (path_flags & MLX5_PATH_FLAG_FL) ? 0x80 : 0;
1217         path->free_ar = (path_flags & MLX5_PATH_FLAG_FREE_AR) ? 0x80 : 0;
1218
1219         if (attr_mask & IB_QP_PKEY_INDEX)
1220                 path->pkey_index = attr->pkey_index;
1221
1222         path->grh_mlid  = ah->src_path_bits & 0x7f;
1223         path->rlid      = cpu_to_be16(ah->dlid);
1224
1225         if (ah->ah_flags & IB_AH_GRH) {
1226                 path->grh_mlid |= 1 << 7;
1227                 path->mgid_index = ah->grh.sgid_index;
1228                 path->hop_limit  = ah->grh.hop_limit;
1229                 path->tclass_flowlabel =
1230                         cpu_to_be32((ah->grh.traffic_class << 20) |
1231                                     (ah->grh.flow_label));
1232                 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1233         }
1234
1235         err = ib_rate_to_mlx5(dev, ah->static_rate);
1236         if (err < 0)
1237                 return err;
1238         path->static_rate = err;
1239         path->port = port;
1240
1241         if (ah->ah_flags & IB_AH_GRH) {
1242                 if (ah->grh.sgid_index >= dev->mdev.caps.port[port - 1].gid_table_len) {
1243                         pr_err(KERN_ERR "sgid_index (%u) too large. max is %d\n",
1244                                ah->grh.sgid_index, dev->mdev.caps.port[port - 1].gid_table_len);
1245                         return -EINVAL;
1246                 }
1247
1248                 path->grh_mlid |= 1 << 7;
1249                 path->mgid_index = ah->grh.sgid_index;
1250                 path->hop_limit  = ah->grh.hop_limit;
1251                 path->tclass_flowlabel =
1252                         cpu_to_be32((ah->grh.traffic_class << 20) |
1253                                     (ah->grh.flow_label));
1254                 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1255         }
1256
1257         if (attr_mask & IB_QP_TIMEOUT)
1258                 path->ackto_lt = attr->timeout << 3;
1259
1260         path->sl = ah->sl & 0xf;
1261
1262         return 0;
1263 }
1264
1265 static enum mlx5_qp_optpar opt_mask[MLX5_QP_NUM_STATE][MLX5_QP_NUM_STATE][MLX5_QP_ST_MAX] = {
1266         [MLX5_QP_STATE_INIT] = {
1267                 [MLX5_QP_STATE_INIT] = {
1268                         [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_RRE            |
1269                                           MLX5_QP_OPTPAR_RAE            |
1270                                           MLX5_QP_OPTPAR_RWE            |
1271                                           MLX5_QP_OPTPAR_PKEY_INDEX     |
1272                                           MLX5_QP_OPTPAR_PRI_PORT,
1273                         [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE            |
1274                                           MLX5_QP_OPTPAR_PKEY_INDEX     |
1275                                           MLX5_QP_OPTPAR_PRI_PORT,
1276                         [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_PKEY_INDEX     |
1277                                           MLX5_QP_OPTPAR_Q_KEY          |
1278                                           MLX5_QP_OPTPAR_PRI_PORT,
1279                 },
1280                 [MLX5_QP_STATE_RTR] = {
1281                         [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH  |
1282                                           MLX5_QP_OPTPAR_RRE            |
1283                                           MLX5_QP_OPTPAR_RAE            |
1284                                           MLX5_QP_OPTPAR_RWE            |
1285                                           MLX5_QP_OPTPAR_PKEY_INDEX,
1286                         [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH  |
1287                                           MLX5_QP_OPTPAR_RWE            |
1288                                           MLX5_QP_OPTPAR_PKEY_INDEX,
1289                         [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_PKEY_INDEX     |
1290                                           MLX5_QP_OPTPAR_Q_KEY,
1291                         [MLX5_QP_ST_MLX] = MLX5_QP_OPTPAR_PKEY_INDEX    |
1292                                            MLX5_QP_OPTPAR_Q_KEY,
1293                         [MLX5_QP_ST_XRC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH |
1294                                           MLX5_QP_OPTPAR_RRE            |
1295                                           MLX5_QP_OPTPAR_RAE            |
1296                                           MLX5_QP_OPTPAR_RWE            |
1297                                           MLX5_QP_OPTPAR_PKEY_INDEX,
1298                 },
1299         },
1300         [MLX5_QP_STATE_RTR] = {
1301                 [MLX5_QP_STATE_RTS] = {
1302                         [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH  |
1303                                           MLX5_QP_OPTPAR_RRE            |
1304                                           MLX5_QP_OPTPAR_RAE            |
1305                                           MLX5_QP_OPTPAR_RWE            |
1306                                           MLX5_QP_OPTPAR_PM_STATE       |
1307                                           MLX5_QP_OPTPAR_RNR_TIMEOUT,
1308                         [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH  |
1309                                           MLX5_QP_OPTPAR_RWE            |
1310                                           MLX5_QP_OPTPAR_PM_STATE,
1311                         [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY,
1312                 },
1313         },
1314         [MLX5_QP_STATE_RTS] = {
1315                 [MLX5_QP_STATE_RTS] = {
1316                         [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_RRE            |
1317                                           MLX5_QP_OPTPAR_RAE            |
1318                                           MLX5_QP_OPTPAR_RWE            |
1319                                           MLX5_QP_OPTPAR_RNR_TIMEOUT    |
1320                                           MLX5_QP_OPTPAR_PM_STATE,
1321                         [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE            |
1322                                           MLX5_QP_OPTPAR_PM_STATE,
1323                         [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY          |
1324                                           MLX5_QP_OPTPAR_SRQN           |
1325                                           MLX5_QP_OPTPAR_CQN_RCV,
1326                 },
1327         },
1328         [MLX5_QP_STATE_SQER] = {
1329                 [MLX5_QP_STATE_RTS] = {
1330                         [MLX5_QP_ST_UD]  = MLX5_QP_OPTPAR_Q_KEY,
1331                         [MLX5_QP_ST_MLX] = MLX5_QP_OPTPAR_Q_KEY,
1332                         [MLX5_QP_ST_UC]  = MLX5_QP_OPTPAR_RWE,
1333                         [MLX5_QP_ST_RC]  = MLX5_QP_OPTPAR_RNR_TIMEOUT   |
1334                                            MLX5_QP_OPTPAR_RWE           |
1335                                            MLX5_QP_OPTPAR_RAE           |
1336                                            MLX5_QP_OPTPAR_RRE,
1337                 },
1338         },
1339 };
1340
1341 static int ib_nr_to_mlx5_nr(int ib_mask)
1342 {
1343         switch (ib_mask) {
1344         case IB_QP_STATE:
1345                 return 0;
1346         case IB_QP_CUR_STATE:
1347                 return 0;
1348         case IB_QP_EN_SQD_ASYNC_NOTIFY:
1349                 return 0;
1350         case IB_QP_ACCESS_FLAGS:
1351                 return MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_RRE |
1352                         MLX5_QP_OPTPAR_RAE;
1353         case IB_QP_PKEY_INDEX:
1354                 return MLX5_QP_OPTPAR_PKEY_INDEX;
1355         case IB_QP_PORT:
1356                 return MLX5_QP_OPTPAR_PRI_PORT;
1357         case IB_QP_QKEY:
1358                 return MLX5_QP_OPTPAR_Q_KEY;
1359         case IB_QP_AV:
1360                 return MLX5_QP_OPTPAR_PRIMARY_ADDR_PATH |
1361                         MLX5_QP_OPTPAR_PRI_PORT;
1362         case IB_QP_PATH_MTU:
1363                 return 0;
1364         case IB_QP_TIMEOUT:
1365                 return MLX5_QP_OPTPAR_ACK_TIMEOUT;
1366         case IB_QP_RETRY_CNT:
1367                 return MLX5_QP_OPTPAR_RETRY_COUNT;
1368         case IB_QP_RNR_RETRY:
1369                 return MLX5_QP_OPTPAR_RNR_RETRY;
1370         case IB_QP_RQ_PSN:
1371                 return 0;
1372         case IB_QP_MAX_QP_RD_ATOMIC:
1373                 return MLX5_QP_OPTPAR_SRA_MAX;
1374         case IB_QP_ALT_PATH:
1375                 return MLX5_QP_OPTPAR_ALT_ADDR_PATH;
1376         case IB_QP_MIN_RNR_TIMER:
1377                 return MLX5_QP_OPTPAR_RNR_TIMEOUT;
1378         case IB_QP_SQ_PSN:
1379                 return 0;
1380         case IB_QP_MAX_DEST_RD_ATOMIC:
1381                 return MLX5_QP_OPTPAR_RRA_MAX | MLX5_QP_OPTPAR_RWE |
1382                         MLX5_QP_OPTPAR_RRE | MLX5_QP_OPTPAR_RAE;
1383         case IB_QP_PATH_MIG_STATE:
1384                 return MLX5_QP_OPTPAR_PM_STATE;
1385         case IB_QP_CAP:
1386                 return 0;
1387         case IB_QP_DEST_QPN:
1388                 return 0;
1389         }
1390         return 0;
1391 }
1392
1393 static int ib_mask_to_mlx5_opt(int ib_mask)
1394 {
1395         int result = 0;
1396         int i;
1397
1398         for (i = 0; i < 8 * sizeof(int); i++) {
1399                 if ((1 << i) & ib_mask)
1400                         result |= ib_nr_to_mlx5_nr(1 << i);
1401         }
1402
1403         return result;
1404 }
1405
1406 static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
1407                                const struct ib_qp_attr *attr, int attr_mask,
1408                                enum ib_qp_state cur_state, enum ib_qp_state new_state)
1409 {
1410         struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
1411         struct mlx5_ib_qp *qp = to_mqp(ibqp);
1412         struct mlx5_ib_cq *send_cq, *recv_cq;
1413         struct mlx5_qp_context *context;
1414         struct mlx5_modify_qp_mbox_in *in;
1415         struct mlx5_ib_pd *pd;
1416         enum mlx5_qp_state mlx5_cur, mlx5_new;
1417         enum mlx5_qp_optpar optpar;
1418         int sqd_event;
1419         int mlx5_st;
1420         int err;
1421
1422         in = kzalloc(sizeof(*in), GFP_KERNEL);
1423         if (!in)
1424                 return -ENOMEM;
1425
1426         context = &in->ctx;
1427         err = to_mlx5_st(ibqp->qp_type);
1428         if (err < 0)
1429                 goto out;
1430
1431         context->flags = cpu_to_be32(err << 16);
1432
1433         if (!(attr_mask & IB_QP_PATH_MIG_STATE)) {
1434                 context->flags |= cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
1435         } else {
1436                 switch (attr->path_mig_state) {
1437                 case IB_MIG_MIGRATED:
1438                         context->flags |= cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
1439                         break;
1440                 case IB_MIG_REARM:
1441                         context->flags |= cpu_to_be32(MLX5_QP_PM_REARM << 11);
1442                         break;
1443                 case IB_MIG_ARMED:
1444                         context->flags |= cpu_to_be32(MLX5_QP_PM_ARMED << 11);
1445                         break;
1446                 }
1447         }
1448
1449         if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) {
1450                 context->mtu_msgmax = (IB_MTU_256 << 5) | 8;
1451         } else if (ibqp->qp_type == IB_QPT_UD ||
1452                    ibqp->qp_type == MLX5_IB_QPT_REG_UMR) {
1453                 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
1454         } else if (attr_mask & IB_QP_PATH_MTU) {
1455                 if (attr->path_mtu < IB_MTU_256 ||
1456                     attr->path_mtu > IB_MTU_4096) {
1457                         mlx5_ib_warn(dev, "invalid mtu %d\n", attr->path_mtu);
1458                         err = -EINVAL;
1459                         goto out;
1460                 }
1461                 context->mtu_msgmax = (attr->path_mtu << 5) | dev->mdev.caps.log_max_msg;
1462         }
1463
1464         if (attr_mask & IB_QP_DEST_QPN)
1465                 context->log_pg_sz_remote_qpn = cpu_to_be32(attr->dest_qp_num);
1466
1467         if (attr_mask & IB_QP_PKEY_INDEX)
1468                 context->pri_path.pkey_index = attr->pkey_index;
1469
1470         /* todo implement counter_index functionality */
1471
1472         if (is_sqp(ibqp->qp_type))
1473                 context->pri_path.port = qp->port;
1474
1475         if (attr_mask & IB_QP_PORT)
1476                 context->pri_path.port = attr->port_num;
1477
1478         if (attr_mask & IB_QP_AV) {
1479                 err = mlx5_set_path(dev, &attr->ah_attr, &context->pri_path,
1480                                     attr_mask & IB_QP_PORT ? attr->port_num : qp->port,
1481                                     attr_mask, 0, attr);
1482                 if (err)
1483                         goto out;
1484         }
1485
1486         if (attr_mask & IB_QP_TIMEOUT)
1487                 context->pri_path.ackto_lt |= attr->timeout << 3;
1488
1489         if (attr_mask & IB_QP_ALT_PATH) {
1490                 err = mlx5_set_path(dev, &attr->alt_ah_attr, &context->alt_path,
1491                                     attr->alt_port_num, attr_mask, 0, attr);
1492                 if (err)
1493                         goto out;
1494         }
1495
1496         pd = get_pd(qp);
1497         get_cqs(qp, &send_cq, &recv_cq);
1498
1499         context->flags_pd = cpu_to_be32(pd ? pd->pdn : to_mpd(dev->devr.p0)->pdn);
1500         context->cqn_send = send_cq ? cpu_to_be32(send_cq->mcq.cqn) : 0;
1501         context->cqn_recv = recv_cq ? cpu_to_be32(recv_cq->mcq.cqn) : 0;
1502         context->params1  = cpu_to_be32(MLX5_IB_ACK_REQ_FREQ << 28);
1503
1504         if (attr_mask & IB_QP_RNR_RETRY)
1505                 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1506
1507         if (attr_mask & IB_QP_RETRY_CNT)
1508                 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1509
1510         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1511                 if (attr->max_rd_atomic)
1512                         context->params1 |=
1513                                 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1514         }
1515
1516         if (attr_mask & IB_QP_SQ_PSN)
1517                 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1518
1519         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1520                 if (attr->max_dest_rd_atomic)
1521                         context->params2 |=
1522                                 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1523         }
1524
1525         if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC))
1526                 context->params2 |= to_mlx5_access_flags(qp, attr, attr_mask);
1527
1528         if (attr_mask & IB_QP_MIN_RNR_TIMER)
1529                 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1530
1531         if (attr_mask & IB_QP_RQ_PSN)
1532                 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1533
1534         if (attr_mask & IB_QP_QKEY)
1535                 context->qkey = cpu_to_be32(attr->qkey);
1536
1537         if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1538                 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1539
1540         if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD  &&
1541             attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1542                 sqd_event = 1;
1543         else
1544                 sqd_event = 0;
1545
1546         if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1547                 context->sq_crq_size |= cpu_to_be16(1 << 4);
1548
1549
1550         mlx5_cur = to_mlx5_state(cur_state);
1551         mlx5_new = to_mlx5_state(new_state);
1552         mlx5_st = to_mlx5_st(ibqp->qp_type);
1553         if (mlx5_cur < 0 || mlx5_new < 0 || mlx5_st < 0)
1554                 goto out;
1555
1556         optpar = ib_mask_to_mlx5_opt(attr_mask);
1557         optpar &= opt_mask[mlx5_cur][mlx5_new][mlx5_st];
1558         in->optparam = cpu_to_be32(optpar);
1559         err = mlx5_core_qp_modify(&dev->mdev, to_mlx5_state(cur_state),
1560                                   to_mlx5_state(new_state), in, sqd_event,
1561                                   &qp->mqp);
1562         if (err)
1563                 goto out;
1564
1565         qp->state = new_state;
1566
1567         if (attr_mask & IB_QP_ACCESS_FLAGS)
1568                 qp->atomic_rd_en = attr->qp_access_flags;
1569         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1570                 qp->resp_depth = attr->max_dest_rd_atomic;
1571         if (attr_mask & IB_QP_PORT)
1572                 qp->port = attr->port_num;
1573         if (attr_mask & IB_QP_ALT_PATH)
1574                 qp->alt_port = attr->alt_port_num;
1575
1576         /*
1577          * If we moved a kernel QP to RESET, clean up all old CQ
1578          * entries and reinitialize the QP.
1579          */
1580         if (new_state == IB_QPS_RESET && !ibqp->uobject) {
1581                 mlx5_ib_cq_clean(recv_cq, qp->mqp.qpn,
1582                                  ibqp->srq ? to_msrq(ibqp->srq) : NULL);
1583                 if (send_cq != recv_cq)
1584                         mlx5_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1585
1586                 qp->rq.head = 0;
1587                 qp->rq.tail = 0;
1588                 qp->sq.head = 0;
1589                 qp->sq.tail = 0;
1590                 qp->sq.cur_post = 0;
1591                 qp->sq.last_poll = 0;
1592                 qp->db.db[MLX5_RCV_DBR] = 0;
1593                 qp->db.db[MLX5_SND_DBR] = 0;
1594         }
1595
1596 out:
1597         kfree(in);
1598         return err;
1599 }
1600
1601 int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1602                       int attr_mask, struct ib_udata *udata)
1603 {
1604         struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
1605         struct mlx5_ib_qp *qp = to_mqp(ibqp);
1606         enum ib_qp_state cur_state, new_state;
1607         int err = -EINVAL;
1608         int port;
1609
1610         mutex_lock(&qp->mutex);
1611
1612         cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1613         new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1614
1615         if (ibqp->qp_type != MLX5_IB_QPT_REG_UMR &&
1616             !ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask))
1617                 goto out;
1618
1619         if ((attr_mask & IB_QP_PORT) &&
1620             (attr->port_num == 0 || attr->port_num > dev->mdev.caps.num_ports))
1621                 goto out;
1622
1623         if (attr_mask & IB_QP_PKEY_INDEX) {
1624                 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1625                 if (attr->pkey_index >= dev->mdev.caps.port[port - 1].pkey_table_len)
1626                         goto out;
1627         }
1628
1629         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1630             attr->max_rd_atomic > dev->mdev.caps.max_ra_res_qp)
1631                 goto out;
1632
1633         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1634             attr->max_dest_rd_atomic > dev->mdev.caps.max_ra_req_qp)
1635                 goto out;
1636
1637         if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1638                 err = 0;
1639                 goto out;
1640         }
1641
1642         err = __mlx5_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
1643
1644 out:
1645         mutex_unlock(&qp->mutex);
1646         return err;
1647 }
1648
1649 static int mlx5_wq_overflow(struct mlx5_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
1650 {
1651         struct mlx5_ib_cq *cq;
1652         unsigned cur;
1653
1654         cur = wq->head - wq->tail;
1655         if (likely(cur + nreq < wq->max_post))
1656                 return 0;
1657
1658         cq = to_mcq(ib_cq);
1659         spin_lock(&cq->lock);
1660         cur = wq->head - wq->tail;
1661         spin_unlock(&cq->lock);
1662
1663         return cur + nreq >= wq->max_post;
1664 }
1665
1666 static __always_inline void set_raddr_seg(struct mlx5_wqe_raddr_seg *rseg,
1667                                           u64 remote_addr, u32 rkey)
1668 {
1669         rseg->raddr    = cpu_to_be64(remote_addr);
1670         rseg->rkey     = cpu_to_be32(rkey);
1671         rseg->reserved = 0;
1672 }
1673
1674 static void set_datagram_seg(struct mlx5_wqe_datagram_seg *dseg,
1675                              struct ib_send_wr *wr)
1676 {
1677         memcpy(&dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof(struct mlx5_av));
1678         dseg->av.dqp_dct = cpu_to_be32(wr->wr.ud.remote_qpn | MLX5_EXTENDED_UD_AV);
1679         dseg->av.key.qkey.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
1680 }
1681
1682 static void set_data_ptr_seg(struct mlx5_wqe_data_seg *dseg, struct ib_sge *sg)
1683 {
1684         dseg->byte_count = cpu_to_be32(sg->length);
1685         dseg->lkey       = cpu_to_be32(sg->lkey);
1686         dseg->addr       = cpu_to_be64(sg->addr);
1687 }
1688
1689 static __be16 get_klm_octo(int npages)
1690 {
1691         return cpu_to_be16(ALIGN(npages, 8) / 2);
1692 }
1693
1694 static __be64 frwr_mkey_mask(void)
1695 {
1696         u64 result;
1697
1698         result = MLX5_MKEY_MASK_LEN             |
1699                 MLX5_MKEY_MASK_PAGE_SIZE        |
1700                 MLX5_MKEY_MASK_START_ADDR       |
1701                 MLX5_MKEY_MASK_EN_RINVAL        |
1702                 MLX5_MKEY_MASK_KEY              |
1703                 MLX5_MKEY_MASK_LR               |
1704                 MLX5_MKEY_MASK_LW               |
1705                 MLX5_MKEY_MASK_RR               |
1706                 MLX5_MKEY_MASK_RW               |
1707                 MLX5_MKEY_MASK_A                |
1708                 MLX5_MKEY_MASK_SMALL_FENCE      |
1709                 MLX5_MKEY_MASK_FREE;
1710
1711         return cpu_to_be64(result);
1712 }
1713
1714 static void set_frwr_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr,
1715                                  struct ib_send_wr *wr, int li)
1716 {
1717         memset(umr, 0, sizeof(*umr));
1718
1719         if (li) {
1720                 umr->mkey_mask = cpu_to_be64(MLX5_MKEY_MASK_FREE);
1721                 umr->flags = 1 << 7;
1722                 return;
1723         }
1724
1725         umr->flags = (1 << 5); /* fail if not free */
1726         umr->klm_octowords = get_klm_octo(wr->wr.fast_reg.page_list_len);
1727         umr->mkey_mask = frwr_mkey_mask();
1728 }
1729
1730 static void set_reg_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr,
1731                                 struct ib_send_wr *wr)
1732 {
1733         struct umr_wr *umrwr = (struct umr_wr *)&wr->wr.fast_reg;
1734         u64 mask;
1735
1736         memset(umr, 0, sizeof(*umr));
1737
1738         if (!(wr->send_flags & MLX5_IB_SEND_UMR_UNREG)) {
1739                 umr->flags = 1 << 5; /* fail if not free */
1740                 umr->klm_octowords = get_klm_octo(umrwr->npages);
1741                 mask =  MLX5_MKEY_MASK_LEN              |
1742                         MLX5_MKEY_MASK_PAGE_SIZE        |
1743                         MLX5_MKEY_MASK_START_ADDR       |
1744                         MLX5_MKEY_MASK_PD               |
1745                         MLX5_MKEY_MASK_LR               |
1746                         MLX5_MKEY_MASK_LW               |
1747                         MLX5_MKEY_MASK_RR               |
1748                         MLX5_MKEY_MASK_RW               |
1749                         MLX5_MKEY_MASK_A                |
1750                         MLX5_MKEY_MASK_FREE;
1751                 umr->mkey_mask = cpu_to_be64(mask);
1752         } else {
1753                 umr->flags = 2 << 5; /* fail if free */
1754                 mask = MLX5_MKEY_MASK_FREE;
1755                 umr->mkey_mask = cpu_to_be64(mask);
1756         }
1757
1758         if (!wr->num_sge)
1759                 umr->flags |= (1 << 7); /* inline */
1760 }
1761
1762 static u8 get_umr_flags(int acc)
1763 {
1764         return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX5_PERM_ATOMIC       : 0) |
1765                (acc & IB_ACCESS_REMOTE_WRITE  ? MLX5_PERM_REMOTE_WRITE : 0) |
1766                (acc & IB_ACCESS_REMOTE_READ   ? MLX5_PERM_REMOTE_READ  : 0) |
1767                (acc & IB_ACCESS_LOCAL_WRITE   ? MLX5_PERM_LOCAL_WRITE  : 0) |
1768                 MLX5_PERM_LOCAL_READ | MLX5_PERM_UMR_EN | MLX5_ACCESS_MODE_MTT;
1769 }
1770
1771 static void set_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr,
1772                              int li, int *writ)
1773 {
1774         memset(seg, 0, sizeof(*seg));
1775         if (li) {
1776                 seg->status = 1 << 6;
1777                 return;
1778         }
1779
1780         seg->flags = get_umr_flags(wr->wr.fast_reg.access_flags);
1781         *writ = seg->flags & (MLX5_PERM_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE);
1782         seg->qpn_mkey7_0 = cpu_to_be32((wr->wr.fast_reg.rkey & 0xff) | 0xffffff00);
1783         seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL);
1784         seg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
1785         seg->len = cpu_to_be64(wr->wr.fast_reg.length);
1786         seg->xlt_oct_size = cpu_to_be32((wr->wr.fast_reg.page_list_len + 1) / 2);
1787         seg->log2_page_size = wr->wr.fast_reg.page_shift;
1788 }
1789
1790 static void set_reg_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr)
1791 {
1792         memset(seg, 0, sizeof(*seg));
1793         if (wr->send_flags & MLX5_IB_SEND_UMR_UNREG) {
1794                 seg->status = 1 << 6;
1795                 return;
1796         }
1797
1798         seg->flags = convert_access(wr->wr.fast_reg.access_flags);
1799         seg->flags_pd = cpu_to_be32(to_mpd((struct ib_pd *)wr->wr.fast_reg.page_list)->pdn);
1800         seg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
1801         seg->len = cpu_to_be64(wr->wr.fast_reg.length);
1802         seg->log2_page_size = wr->wr.fast_reg.page_shift;
1803         seg->qpn_mkey7_0 = cpu_to_be32(0xffffff << 8);
1804 }
1805
1806 static void set_frwr_pages(struct mlx5_wqe_data_seg *dseg,
1807                            struct ib_send_wr *wr,
1808                            struct mlx5_core_dev *mdev,
1809                            struct mlx5_ib_pd *pd,
1810                            int writ)
1811 {
1812         struct mlx5_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
1813         u64 *page_list = wr->wr.fast_reg.page_list->page_list;
1814         u64 perm = MLX5_EN_RD | (writ ? MLX5_EN_WR : 0);
1815         int i;
1816
1817         for (i = 0; i < wr->wr.fast_reg.page_list_len; i++)
1818                 mfrpl->mapped_page_list[i] = cpu_to_be64(page_list[i] | perm);
1819         dseg->addr = cpu_to_be64(mfrpl->map);
1820         dseg->byte_count = cpu_to_be32(ALIGN(sizeof(u64) * wr->wr.fast_reg.page_list_len, 64));
1821         dseg->lkey = cpu_to_be32(pd->pa_lkey);
1822 }
1823
1824 static __be32 send_ieth(struct ib_send_wr *wr)
1825 {
1826         switch (wr->opcode) {
1827         case IB_WR_SEND_WITH_IMM:
1828         case IB_WR_RDMA_WRITE_WITH_IMM:
1829                 return wr->ex.imm_data;
1830
1831         case IB_WR_SEND_WITH_INV:
1832                 return cpu_to_be32(wr->ex.invalidate_rkey);
1833
1834         default:
1835                 return 0;
1836         }
1837 }
1838
1839 static u8 calc_sig(void *wqe, int size)
1840 {
1841         u8 *p = wqe;
1842         u8 res = 0;
1843         int i;
1844
1845         for (i = 0; i < size; i++)
1846                 res ^= p[i];
1847
1848         return ~res;
1849 }
1850
1851 static u8 wq_sig(void *wqe)
1852 {
1853         return calc_sig(wqe, (*((u8 *)wqe + 8) & 0x3f) << 4);
1854 }
1855
1856 static int set_data_inl_seg(struct mlx5_ib_qp *qp, struct ib_send_wr *wr,
1857                             void *wqe, int *sz)
1858 {
1859         struct mlx5_wqe_inline_seg *seg;
1860         void *qend = qp->sq.qend;
1861         void *addr;
1862         int inl = 0;
1863         int copy;
1864         int len;
1865         int i;
1866
1867         seg = wqe;
1868         wqe += sizeof(*seg);
1869         for (i = 0; i < wr->num_sge; i++) {
1870                 addr = (void *)(unsigned long)(wr->sg_list[i].addr);
1871                 len  = wr->sg_list[i].length;
1872                 inl += len;
1873
1874                 if (unlikely(inl > qp->max_inline_data))
1875                         return -ENOMEM;
1876
1877                 if (unlikely(wqe + len > qend)) {
1878                         copy = qend - wqe;
1879                         memcpy(wqe, addr, copy);
1880                         addr += copy;
1881                         len -= copy;
1882                         wqe = mlx5_get_send_wqe(qp, 0);
1883                 }
1884                 memcpy(wqe, addr, len);
1885                 wqe += len;
1886         }
1887
1888         seg->byte_count = cpu_to_be32(inl | MLX5_INLINE_SEG);
1889
1890         *sz = ALIGN(inl + sizeof(seg->byte_count), 16) / 16;
1891
1892         return 0;
1893 }
1894
1895 static int set_frwr_li_wr(void **seg, struct ib_send_wr *wr, int *size,
1896                           struct mlx5_core_dev *mdev, struct mlx5_ib_pd *pd, struct mlx5_ib_qp *qp)
1897 {
1898         int writ = 0;
1899         int li;
1900
1901         li = wr->opcode == IB_WR_LOCAL_INV ? 1 : 0;
1902         if (unlikely(wr->send_flags & IB_SEND_INLINE))
1903                 return -EINVAL;
1904
1905         set_frwr_umr_segment(*seg, wr, li);
1906         *seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
1907         *size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
1908         if (unlikely((*seg == qp->sq.qend)))
1909                 *seg = mlx5_get_send_wqe(qp, 0);
1910         set_mkey_segment(*seg, wr, li, &writ);
1911         *seg += sizeof(struct mlx5_mkey_seg);
1912         *size += sizeof(struct mlx5_mkey_seg) / 16;
1913         if (unlikely((*seg == qp->sq.qend)))
1914                 *seg = mlx5_get_send_wqe(qp, 0);
1915         if (!li) {
1916                 set_frwr_pages(*seg, wr, mdev, pd, writ);
1917                 *seg += sizeof(struct mlx5_wqe_data_seg);
1918                 *size += (sizeof(struct mlx5_wqe_data_seg) / 16);
1919         }
1920         return 0;
1921 }
1922
1923 static void dump_wqe(struct mlx5_ib_qp *qp, int idx, int size_16)
1924 {
1925         __be32 *p = NULL;
1926         int tidx = idx;
1927         int i, j;
1928
1929         pr_debug("dump wqe at %p\n", mlx5_get_send_wqe(qp, tidx));
1930         for (i = 0, j = 0; i < size_16 * 4; i += 4, j += 4) {
1931                 if ((i & 0xf) == 0) {
1932                         void *buf = mlx5_get_send_wqe(qp, tidx);
1933                         tidx = (tidx + 1) & (qp->sq.wqe_cnt - 1);
1934                         p = buf;
1935                         j = 0;
1936                 }
1937                 pr_debug("%08x %08x %08x %08x\n", be32_to_cpu(p[j]),
1938                          be32_to_cpu(p[j + 1]), be32_to_cpu(p[j + 2]),
1939                          be32_to_cpu(p[j + 3]));
1940         }
1941 }
1942
1943 static void mlx5_bf_copy(u64 __iomem *dst, u64 *src,
1944                          unsigned bytecnt, struct mlx5_ib_qp *qp)
1945 {
1946         while (bytecnt > 0) {
1947                 __iowrite64_copy(dst++, src++, 8);
1948                 __iowrite64_copy(dst++, src++, 8);
1949                 __iowrite64_copy(dst++, src++, 8);
1950                 __iowrite64_copy(dst++, src++, 8);
1951                 __iowrite64_copy(dst++, src++, 8);
1952                 __iowrite64_copy(dst++, src++, 8);
1953                 __iowrite64_copy(dst++, src++, 8);
1954                 __iowrite64_copy(dst++, src++, 8);
1955                 bytecnt -= 64;
1956                 if (unlikely(src == qp->sq.qend))
1957                         src = mlx5_get_send_wqe(qp, 0);
1958         }
1959 }
1960
1961 static u8 get_fence(u8 fence, struct ib_send_wr *wr)
1962 {
1963         if (unlikely(wr->opcode == IB_WR_LOCAL_INV &&
1964                      wr->send_flags & IB_SEND_FENCE))
1965                 return MLX5_FENCE_MODE_STRONG_ORDERING;
1966
1967         if (unlikely(fence)) {
1968                 if (wr->send_flags & IB_SEND_FENCE)
1969                         return MLX5_FENCE_MODE_SMALL_AND_FENCE;
1970                 else
1971                         return fence;
1972
1973         } else {
1974                 return 0;
1975         }
1976 }
1977
1978 int mlx5_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
1979                       struct ib_send_wr **bad_wr)
1980 {
1981         struct mlx5_wqe_ctrl_seg *ctrl = NULL;  /* compiler warning */
1982         struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
1983         struct mlx5_core_dev *mdev = &dev->mdev;
1984         struct mlx5_ib_qp *qp = to_mqp(ibqp);
1985         struct mlx5_wqe_data_seg *dpseg;
1986         struct mlx5_wqe_xrc_seg *xrc;
1987         struct mlx5_bf *bf = qp->bf;
1988         int uninitialized_var(size);
1989         void *qend = qp->sq.qend;
1990         unsigned long flags;
1991         u32 mlx5_opcode;
1992         unsigned idx;
1993         int err = 0;
1994         int inl = 0;
1995         int num_sge;
1996         void *seg;
1997         int nreq;
1998         int i;
1999         u8 next_fence = 0;
2000         u8 opmod = 0;
2001         u8 fence;
2002
2003         spin_lock_irqsave(&qp->sq.lock, flags);
2004
2005         for (nreq = 0; wr; nreq++, wr = wr->next) {
2006                 if (unlikely(wr->opcode >= sizeof(mlx5_ib_opcode) / sizeof(mlx5_ib_opcode[0]))) {
2007                         mlx5_ib_warn(dev, "\n");
2008                         err = -EINVAL;
2009                         *bad_wr = wr;
2010                         goto out;
2011                 }
2012
2013                 if (unlikely(mlx5_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq))) {
2014                         mlx5_ib_warn(dev, "\n");
2015                         err = -ENOMEM;
2016                         *bad_wr = wr;
2017                         goto out;
2018                 }
2019
2020                 fence = qp->fm_cache;
2021                 num_sge = wr->num_sge;
2022                 if (unlikely(num_sge > qp->sq.max_gs)) {
2023                         mlx5_ib_warn(dev, "\n");
2024                         err = -ENOMEM;
2025                         *bad_wr = wr;
2026                         goto out;
2027                 }
2028
2029                 idx = qp->sq.cur_post & (qp->sq.wqe_cnt - 1);
2030                 seg = mlx5_get_send_wqe(qp, idx);
2031                 ctrl = seg;
2032                 *(uint32_t *)(seg + 8) = 0;
2033                 ctrl->imm = send_ieth(wr);
2034                 ctrl->fm_ce_se = qp->sq_signal_bits |
2035                         (wr->send_flags & IB_SEND_SIGNALED ?
2036                          MLX5_WQE_CTRL_CQ_UPDATE : 0) |
2037                         (wr->send_flags & IB_SEND_SOLICITED ?
2038                          MLX5_WQE_CTRL_SOLICITED : 0);
2039
2040                 seg += sizeof(*ctrl);
2041                 size = sizeof(*ctrl) / 16;
2042
2043                 switch (ibqp->qp_type) {
2044                 case IB_QPT_XRC_INI:
2045                         xrc = seg;
2046                         xrc->xrc_srqn = htonl(wr->xrc_remote_srq_num);
2047                         seg += sizeof(*xrc);
2048                         size += sizeof(*xrc) / 16;
2049                         /* fall through */
2050                 case IB_QPT_RC:
2051                         switch (wr->opcode) {
2052                         case IB_WR_RDMA_READ:
2053                         case IB_WR_RDMA_WRITE:
2054                         case IB_WR_RDMA_WRITE_WITH_IMM:
2055                                 set_raddr_seg(seg, wr->wr.rdma.remote_addr,
2056                                               wr->wr.rdma.rkey);
2057                                 seg  += sizeof(struct mlx5_wqe_raddr_seg);
2058                                 size += sizeof(struct mlx5_wqe_raddr_seg) / 16;
2059                                 break;
2060
2061                         case IB_WR_ATOMIC_CMP_AND_SWP:
2062                         case IB_WR_ATOMIC_FETCH_AND_ADD:
2063                         case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2064                                 mlx5_ib_warn(dev, "Atomic operations are not supported yet\n");
2065                                 err = -ENOSYS;
2066                                 *bad_wr = wr;
2067                                 goto out;
2068
2069                         case IB_WR_LOCAL_INV:
2070                                 next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL;
2071                                 qp->sq.wr_data[idx] = IB_WR_LOCAL_INV;
2072                                 ctrl->imm = cpu_to_be32(wr->ex.invalidate_rkey);
2073                                 err = set_frwr_li_wr(&seg, wr, &size, mdev, to_mpd(ibqp->pd), qp);
2074                                 if (err) {
2075                                         mlx5_ib_warn(dev, "\n");
2076                                         *bad_wr = wr;
2077                                         goto out;
2078                                 }
2079                                 num_sge = 0;
2080                                 break;
2081
2082                         case IB_WR_FAST_REG_MR:
2083                                 next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL;
2084                                 qp->sq.wr_data[idx] = IB_WR_FAST_REG_MR;
2085                                 ctrl->imm = cpu_to_be32(wr->wr.fast_reg.rkey);
2086                                 err = set_frwr_li_wr(&seg, wr, &size, mdev, to_mpd(ibqp->pd), qp);
2087                                 if (err) {
2088                                         mlx5_ib_warn(dev, "\n");
2089                                         *bad_wr = wr;
2090                                         goto out;
2091                                 }
2092                                 num_sge = 0;
2093                                 break;
2094
2095                         default:
2096                                 break;
2097                         }
2098                         break;
2099
2100                 case IB_QPT_UC:
2101                         switch (wr->opcode) {
2102                         case IB_WR_RDMA_WRITE:
2103                         case IB_WR_RDMA_WRITE_WITH_IMM:
2104                                 set_raddr_seg(seg, wr->wr.rdma.remote_addr,
2105                                               wr->wr.rdma.rkey);
2106                                 seg  += sizeof(struct mlx5_wqe_raddr_seg);
2107                                 size += sizeof(struct mlx5_wqe_raddr_seg) / 16;
2108                                 break;
2109
2110                         default:
2111                                 break;
2112                         }
2113                         break;
2114
2115                 case IB_QPT_UD:
2116                 case IB_QPT_SMI:
2117                 case IB_QPT_GSI:
2118                         set_datagram_seg(seg, wr);
2119                         seg  += sizeof(struct mlx5_wqe_datagram_seg);
2120                         size += sizeof(struct mlx5_wqe_datagram_seg) / 16;
2121                         if (unlikely((seg == qend)))
2122                                 seg = mlx5_get_send_wqe(qp, 0);
2123                         break;
2124
2125                 case MLX5_IB_QPT_REG_UMR:
2126                         if (wr->opcode != MLX5_IB_WR_UMR) {
2127                                 err = -EINVAL;
2128                                 mlx5_ib_warn(dev, "bad opcode\n");
2129                                 goto out;
2130                         }
2131                         qp->sq.wr_data[idx] = MLX5_IB_WR_UMR;
2132                         ctrl->imm = cpu_to_be32(wr->wr.fast_reg.rkey);
2133                         set_reg_umr_segment(seg, wr);
2134                         seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
2135                         size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
2136                         if (unlikely((seg == qend)))
2137                                 seg = mlx5_get_send_wqe(qp, 0);
2138                         set_reg_mkey_segment(seg, wr);
2139                         seg += sizeof(struct mlx5_mkey_seg);
2140                         size += sizeof(struct mlx5_mkey_seg) / 16;
2141                         if (unlikely((seg == qend)))
2142                                 seg = mlx5_get_send_wqe(qp, 0);
2143                         break;
2144
2145                 default:
2146                         break;
2147                 }
2148
2149                 if (wr->send_flags & IB_SEND_INLINE && num_sge) {
2150                         int uninitialized_var(sz);
2151
2152                         err = set_data_inl_seg(qp, wr, seg, &sz);
2153                         if (unlikely(err)) {
2154                                 mlx5_ib_warn(dev, "\n");
2155                                 *bad_wr = wr;
2156                                 goto out;
2157                         }
2158                         inl = 1;
2159                         size += sz;
2160                 } else {
2161                         dpseg = seg;
2162                         for (i = 0; i < num_sge; i++) {
2163                                 if (unlikely(dpseg == qend)) {
2164                                         seg = mlx5_get_send_wqe(qp, 0);
2165                                         dpseg = seg;
2166                                 }
2167                                 if (likely(wr->sg_list[i].length)) {
2168                                         set_data_ptr_seg(dpseg, wr->sg_list + i);
2169                                         size += sizeof(struct mlx5_wqe_data_seg) / 16;
2170                                         dpseg++;
2171                                 }
2172                         }
2173                 }
2174
2175                 mlx5_opcode = mlx5_ib_opcode[wr->opcode];
2176                 ctrl->opmod_idx_opcode = cpu_to_be32(((u32)(qp->sq.cur_post) << 8)      |
2177                                                      mlx5_opcode                        |
2178                                                      ((u32)opmod << 24));
2179                 ctrl->qpn_ds = cpu_to_be32(size | (qp->mqp.qpn << 8));
2180                 ctrl->fm_ce_se |= get_fence(fence, wr);
2181                 qp->fm_cache = next_fence;
2182                 if (unlikely(qp->wq_sig))
2183                         ctrl->signature = wq_sig(ctrl);
2184
2185                 qp->sq.wrid[idx] = wr->wr_id;
2186                 qp->sq.w_list[idx].opcode = mlx5_opcode;
2187                 qp->sq.wqe_head[idx] = qp->sq.head + nreq;
2188                 qp->sq.cur_post += DIV_ROUND_UP(size * 16, MLX5_SEND_WQE_BB);
2189                 qp->sq.w_list[idx].next = qp->sq.cur_post;
2190
2191                 if (0)
2192                         dump_wqe(qp, idx, size);
2193         }
2194
2195 out:
2196         if (likely(nreq)) {
2197                 qp->sq.head += nreq;
2198
2199                 /* Make sure that descriptors are written before
2200                  * updating doorbell record and ringing the doorbell
2201                  */
2202                 wmb();
2203
2204                 qp->db.db[MLX5_SND_DBR] = cpu_to_be32(qp->sq.cur_post);
2205
2206                 if (bf->need_lock)
2207                         spin_lock(&bf->lock);
2208
2209                 /* TBD enable WC */
2210                 if (0 && nreq == 1 && bf->uuarn && inl && size > 1 && size <= bf->buf_size / 16) {
2211                         mlx5_bf_copy(bf->reg + bf->offset, (u64 *)ctrl, ALIGN(size * 16, 64), qp);
2212                         /* wc_wmb(); */
2213                 } else {
2214                         mlx5_write64((__be32 *)ctrl, bf->regreg + bf->offset,
2215                                      MLX5_GET_DOORBELL_LOCK(&bf->lock32));
2216                         /* Make sure doorbells don't leak out of SQ spinlock
2217                          * and reach the HCA out of order.
2218                          */
2219                         mmiowb();
2220                 }
2221                 bf->offset ^= bf->buf_size;
2222                 if (bf->need_lock)
2223                         spin_unlock(&bf->lock);
2224         }
2225
2226         spin_unlock_irqrestore(&qp->sq.lock, flags);
2227
2228         return err;
2229 }
2230
2231 static void set_sig_seg(struct mlx5_rwqe_sig *sig, int size)
2232 {
2233         sig->signature = calc_sig(sig, size);
2234 }
2235
2236 int mlx5_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2237                       struct ib_recv_wr **bad_wr)
2238 {
2239         struct mlx5_ib_qp *qp = to_mqp(ibqp);
2240         struct mlx5_wqe_data_seg *scat;
2241         struct mlx5_rwqe_sig *sig;
2242         unsigned long flags;
2243         int err = 0;
2244         int nreq;
2245         int ind;
2246         int i;
2247
2248         spin_lock_irqsave(&qp->rq.lock, flags);
2249
2250         ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2251
2252         for (nreq = 0; wr; nreq++, wr = wr->next) {
2253                 if (mlx5_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2254                         err = -ENOMEM;
2255                         *bad_wr = wr;
2256                         goto out;
2257                 }
2258
2259                 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2260                         err = -EINVAL;
2261                         *bad_wr = wr;
2262                         goto out;
2263                 }
2264
2265                 scat = get_recv_wqe(qp, ind);
2266                 if (qp->wq_sig)
2267                         scat++;
2268
2269                 for (i = 0; i < wr->num_sge; i++)
2270                         set_data_ptr_seg(scat + i, wr->sg_list + i);
2271
2272                 if (i < qp->rq.max_gs) {
2273                         scat[i].byte_count = 0;
2274                         scat[i].lkey       = cpu_to_be32(MLX5_INVALID_LKEY);
2275                         scat[i].addr       = 0;
2276                 }
2277
2278                 if (qp->wq_sig) {
2279                         sig = (struct mlx5_rwqe_sig *)scat;
2280                         set_sig_seg(sig, (qp->rq.max_gs + 1) << 2);
2281                 }
2282
2283                 qp->rq.wrid[ind] = wr->wr_id;
2284
2285                 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
2286         }
2287
2288 out:
2289         if (likely(nreq)) {
2290                 qp->rq.head += nreq;
2291
2292                 /* Make sure that descriptors are written before
2293                  * doorbell record.
2294                  */
2295                 wmb();
2296
2297                 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
2298         }
2299
2300         spin_unlock_irqrestore(&qp->rq.lock, flags);
2301
2302         return err;
2303 }
2304
2305 static inline enum ib_qp_state to_ib_qp_state(enum mlx5_qp_state mlx5_state)
2306 {
2307         switch (mlx5_state) {
2308         case MLX5_QP_STATE_RST:      return IB_QPS_RESET;
2309         case MLX5_QP_STATE_INIT:     return IB_QPS_INIT;
2310         case MLX5_QP_STATE_RTR:      return IB_QPS_RTR;
2311         case MLX5_QP_STATE_RTS:      return IB_QPS_RTS;
2312         case MLX5_QP_STATE_SQ_DRAINING:
2313         case MLX5_QP_STATE_SQD:      return IB_QPS_SQD;
2314         case MLX5_QP_STATE_SQER:     return IB_QPS_SQE;
2315         case MLX5_QP_STATE_ERR:      return IB_QPS_ERR;
2316         default:                     return -1;
2317         }
2318 }
2319
2320 static inline enum ib_mig_state to_ib_mig_state(int mlx5_mig_state)
2321 {
2322         switch (mlx5_mig_state) {
2323         case MLX5_QP_PM_ARMED:          return IB_MIG_ARMED;
2324         case MLX5_QP_PM_REARM:          return IB_MIG_REARM;
2325         case MLX5_QP_PM_MIGRATED:       return IB_MIG_MIGRATED;
2326         default: return -1;
2327         }
2328 }
2329
2330 static int to_ib_qp_access_flags(int mlx5_flags)
2331 {
2332         int ib_flags = 0;
2333
2334         if (mlx5_flags & MLX5_QP_BIT_RRE)
2335                 ib_flags |= IB_ACCESS_REMOTE_READ;
2336         if (mlx5_flags & MLX5_QP_BIT_RWE)
2337                 ib_flags |= IB_ACCESS_REMOTE_WRITE;
2338         if (mlx5_flags & MLX5_QP_BIT_RAE)
2339                 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
2340
2341         return ib_flags;
2342 }
2343
2344 static void to_ib_ah_attr(struct mlx5_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
2345                                 struct mlx5_qp_path *path)
2346 {
2347         struct mlx5_core_dev *dev = &ibdev->mdev;
2348
2349         memset(ib_ah_attr, 0, sizeof(*ib_ah_attr));
2350         ib_ah_attr->port_num      = path->port;
2351
2352         if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
2353                 return;
2354
2355         ib_ah_attr->sl = path->sl & 0xf;
2356
2357         ib_ah_attr->dlid          = be16_to_cpu(path->rlid);
2358         ib_ah_attr->src_path_bits = path->grh_mlid & 0x7f;
2359         ib_ah_attr->static_rate   = path->static_rate ? path->static_rate - 5 : 0;
2360         ib_ah_attr->ah_flags      = (path->grh_mlid & (1 << 7)) ? IB_AH_GRH : 0;
2361         if (ib_ah_attr->ah_flags) {
2362                 ib_ah_attr->grh.sgid_index = path->mgid_index;
2363                 ib_ah_attr->grh.hop_limit  = path->hop_limit;
2364                 ib_ah_attr->grh.traffic_class =
2365                         (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
2366                 ib_ah_attr->grh.flow_label =
2367                         be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
2368                 memcpy(ib_ah_attr->grh.dgid.raw,
2369                        path->rgid, sizeof(ib_ah_attr->grh.dgid.raw));
2370         }
2371 }
2372
2373 int mlx5_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
2374                      struct ib_qp_init_attr *qp_init_attr)
2375 {
2376         struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
2377         struct mlx5_ib_qp *qp = to_mqp(ibqp);
2378         struct mlx5_query_qp_mbox_out *outb;
2379         struct mlx5_qp_context *context;
2380         int mlx5_state;
2381         int err = 0;
2382
2383         mutex_lock(&qp->mutex);
2384         outb = kzalloc(sizeof(*outb), GFP_KERNEL);
2385         if (!outb) {
2386                 err = -ENOMEM;
2387                 goto out;
2388         }
2389         context = &outb->ctx;
2390         err = mlx5_core_qp_query(&dev->mdev, &qp->mqp, outb, sizeof(*outb));
2391         if (err)
2392                 goto out_free;
2393
2394         mlx5_state = be32_to_cpu(context->flags) >> 28;
2395
2396         qp->state                    = to_ib_qp_state(mlx5_state);
2397         qp_attr->qp_state            = qp->state;
2398         qp_attr->path_mtu            = context->mtu_msgmax >> 5;
2399         qp_attr->path_mig_state      =
2400                 to_ib_mig_state((be32_to_cpu(context->flags) >> 11) & 0x3);
2401         qp_attr->qkey                = be32_to_cpu(context->qkey);
2402         qp_attr->rq_psn              = be32_to_cpu(context->rnr_nextrecvpsn) & 0xffffff;
2403         qp_attr->sq_psn              = be32_to_cpu(context->next_send_psn) & 0xffffff;
2404         qp_attr->dest_qp_num         = be32_to_cpu(context->log_pg_sz_remote_qpn) & 0xffffff;
2405         qp_attr->qp_access_flags     =
2406                 to_ib_qp_access_flags(be32_to_cpu(context->params2));
2407
2408         if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
2409                 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context->pri_path);
2410                 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context->alt_path);
2411                 qp_attr->alt_pkey_index = context->alt_path.pkey_index & 0x7f;
2412                 qp_attr->alt_port_num   = qp_attr->alt_ah_attr.port_num;
2413         }
2414
2415         qp_attr->pkey_index = context->pri_path.pkey_index & 0x7f;
2416         qp_attr->port_num = context->pri_path.port;
2417
2418         /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
2419         qp_attr->sq_draining = mlx5_state == MLX5_QP_STATE_SQ_DRAINING;
2420
2421         qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context->params1) >> 21) & 0x7);
2422
2423         qp_attr->max_dest_rd_atomic =
2424                 1 << ((be32_to_cpu(context->params2) >> 21) & 0x7);
2425         qp_attr->min_rnr_timer      =
2426                 (be32_to_cpu(context->rnr_nextrecvpsn) >> 24) & 0x1f;
2427         qp_attr->timeout            = context->pri_path.ackto_lt >> 3;
2428         qp_attr->retry_cnt          = (be32_to_cpu(context->params1) >> 16) & 0x7;
2429         qp_attr->rnr_retry          = (be32_to_cpu(context->params1) >> 13) & 0x7;
2430         qp_attr->alt_timeout        = context->alt_path.ackto_lt >> 3;
2431         qp_attr->cur_qp_state        = qp_attr->qp_state;
2432         qp_attr->cap.max_recv_wr     = qp->rq.wqe_cnt;
2433         qp_attr->cap.max_recv_sge    = qp->rq.max_gs;
2434
2435         if (!ibqp->uobject) {
2436                 qp_attr->cap.max_send_wr  = qp->sq.wqe_cnt;
2437                 qp_attr->cap.max_send_sge = qp->sq.max_gs;
2438         } else {
2439                 qp_attr->cap.max_send_wr  = 0;
2440                 qp_attr->cap.max_send_sge = 0;
2441         }
2442
2443         /* We don't support inline sends for kernel QPs (yet), and we
2444          * don't know what userspace's value should be.
2445          */
2446         qp_attr->cap.max_inline_data = 0;
2447
2448         qp_init_attr->cap            = qp_attr->cap;
2449
2450         qp_init_attr->create_flags = 0;
2451         if (qp->flags & MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK)
2452                 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
2453
2454         qp_init_attr->sq_sig_type = qp->sq_signal_bits & MLX5_WQE_CTRL_CQ_UPDATE ?
2455                 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
2456
2457 out_free:
2458         kfree(outb);
2459
2460 out:
2461         mutex_unlock(&qp->mutex);
2462         return err;
2463 }
2464
2465 struct ib_xrcd *mlx5_ib_alloc_xrcd(struct ib_device *ibdev,
2466                                           struct ib_ucontext *context,
2467                                           struct ib_udata *udata)
2468 {
2469         struct mlx5_ib_dev *dev = to_mdev(ibdev);
2470         struct mlx5_ib_xrcd *xrcd;
2471         int err;
2472
2473         if (!(dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_XRC))
2474                 return ERR_PTR(-ENOSYS);
2475
2476         xrcd = kmalloc(sizeof(*xrcd), GFP_KERNEL);
2477         if (!xrcd)
2478                 return ERR_PTR(-ENOMEM);
2479
2480         err = mlx5_core_xrcd_alloc(&dev->mdev, &xrcd->xrcdn);
2481         if (err) {
2482                 kfree(xrcd);
2483                 return ERR_PTR(-ENOMEM);
2484         }
2485
2486         return &xrcd->ibxrcd;
2487 }
2488
2489 int mlx5_ib_dealloc_xrcd(struct ib_xrcd *xrcd)
2490 {
2491         struct mlx5_ib_dev *dev = to_mdev(xrcd->device);
2492         u32 xrcdn = to_mxrcd(xrcd)->xrcdn;
2493         int err;
2494
2495         err = mlx5_core_xrcd_dealloc(&dev->mdev, xrcdn);
2496         if (err) {
2497                 mlx5_ib_warn(dev, "failed to dealloc xrcdn 0x%x\n", xrcdn);
2498                 return err;
2499         }
2500
2501         kfree(xrcd);
2502
2503         return 0;
2504 }