kernel/drivers/infiniband/hw/mlx5/qp.c

   1 /*
   2  * Copyright (c) 2013-2015, Mellanox Technologies. 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
  74 static int is_qp0(enum ib_qp_type qp_type)
  75 {
  76         return qp_type == IB_QPT_SMI;
  77 }
  78
  79 static int is_qp1(enum ib_qp_type qp_type)
  80 {
  81         return qp_type == IB_QPT_GSI;
  82 }
  83
  84 static int is_sqp(enum ib_qp_type qp_type)
  85 {
  86         return is_qp0(qp_type) || is_qp1(qp_type);
  87 }
  88
  89 static void *get_wqe(struct mlx5_ib_qp *qp, int offset)
  90 {
  91         return mlx5_buf_offset(&qp->buf, offset);
  92 }
  93
  94 static void *get_recv_wqe(struct mlx5_ib_qp *qp, int n)
  95 {
  96         return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
  97 }
  98
  99 void *mlx5_get_send_wqe(struct mlx5_ib_qp *qp, int n)
 100 {
 101         return get_wqe(qp, qp->sq.offset + (n << MLX5_IB_SQ_STRIDE));
 102 }
 103
 104 /**
 105  * mlx5_ib_read_user_wqe() - Copy a user-space WQE to kernel space.
 106  *
 107  * @qp: QP to copy from.
 108  * @send: copy from the send queue when non-zero, use the receive queue
 109  *        otherwise.
 110  * @wqe_index:  index to start copying from. For send work queues, the
 111  *              wqe_index is in units of MLX5_SEND_WQE_BB.
 112  *              For receive work queue, it is the number of work queue
 113  *              element in the queue.
 114  * @buffer: destination buffer.
 115  * @length: maximum number of bytes to copy.
 116  *
 117  * Copies at least a single WQE, but may copy more data.
 118  *
 119  * Return: the number of bytes copied, or an error code.
 120  */
 121 int mlx5_ib_read_user_wqe(struct mlx5_ib_qp *qp, int send, int wqe_index,
 122                           void *buffer, u32 length)
 123 {
 124         struct ib_device *ibdev = qp->ibqp.device;
 125         struct mlx5_ib_dev *dev = to_mdev(ibdev);
 126         struct mlx5_ib_wq *wq = send ? &qp->sq : &qp->rq;
 127         size_t offset;
 128         size_t wq_end;
 129         struct ib_umem *umem = qp->umem;
 130         u32 first_copy_length;
 131         int wqe_length;
 132         int ret;
 133
 134         if (wq->wqe_cnt == 0) {
 135                 mlx5_ib_dbg(dev, "mlx5_ib_read_user_wqe for a QP with wqe_cnt == 0. qp_type: 0x%x\n",
 136                             qp->ibqp.qp_type);
 137                 return -EINVAL;
 138         }
 139
 140         offset = wq->offset + ((wqe_index % wq->wqe_cnt) << wq->wqe_shift);
 141         wq_end = wq->offset + (wq->wqe_cnt << wq->wqe_shift);
 142
 143         if (send && length < sizeof(struct mlx5_wqe_ctrl_seg))
 144                 return -EINVAL;
 145
 146         if (offset > umem->length ||
 147             (send && offset + sizeof(struct mlx5_wqe_ctrl_seg) > umem->length))
 148                 return -EINVAL;
 149
 150         first_copy_length = min_t(u32, offset + length, wq_end) - offset;
 151         ret = ib_umem_copy_from(buffer, umem, offset, first_copy_length);
 152         if (ret)
 153                 return ret;
 154
 155         if (send) {
 156                 struct mlx5_wqe_ctrl_seg *ctrl = buffer;
 157                 int ds = be32_to_cpu(ctrl->qpn_ds) & MLX5_WQE_CTRL_DS_MASK;
 158
 159                 wqe_length = ds * MLX5_WQE_DS_UNITS;
 160         } else {
 161                 wqe_length = 1 << wq->wqe_shift;
 162         }
 163
 164         if (wqe_length <= first_copy_length)
 165                 return first_copy_length;
 166
 167         ret = ib_umem_copy_from(buffer + first_copy_length, umem, wq->offset,
 168                                 wqe_length - first_copy_length);
 169         if (ret)
 170                 return ret;
 171
 172         return wqe_length;
 173 }
 174
 175 static void mlx5_ib_qp_event(struct mlx5_core_qp *qp, int type)
 176 {
 177         struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
 178         struct ib_event event;
 179
 180         if (type == MLX5_EVENT_TYPE_PATH_MIG)
 181                 to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
 182
 183         if (ibqp->event_handler) {
 184                 event.device     = ibqp->device;
 185                 event.element.qp = ibqp;
 186                 switch (type) {
 187                 case MLX5_EVENT_TYPE_PATH_MIG:
 188                         event.event = IB_EVENT_PATH_MIG;
 189                         break;
 190                 case MLX5_EVENT_TYPE_COMM_EST:
 191                         event.event = IB_EVENT_COMM_EST;
 192                         break;
 193                 case MLX5_EVENT_TYPE_SQ_DRAINED:
 194                         event.event = IB_EVENT_SQ_DRAINED;
 195                         break;
 196                 case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
 197                         event.event = IB_EVENT_QP_LAST_WQE_REACHED;
 198                         break;
 199                 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
 200                         event.event = IB_EVENT_QP_FATAL;
 201                         break;
 202                 case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
 203                         event.event = IB_EVENT_PATH_MIG_ERR;
 204                         break;
 205                 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
 206                         event.event = IB_EVENT_QP_REQ_ERR;
 207                         break;
 208                 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
 209                         event.event = IB_EVENT_QP_ACCESS_ERR;
 210                         break;
 211                 default:
 212                         pr_warn("mlx5_ib: Unexpected event type %d on QP %06x\n", type, qp->qpn);
 213                         return;
 214                 }
 215
 216                 ibqp->event_handler(&event, ibqp->qp_context);
 217         }
 218 }
 219
 220 static int set_rq_size(struct mlx5_ib_dev *dev, struct ib_qp_cap *cap,
 221                        int has_rq, struct mlx5_ib_qp *qp, struct mlx5_ib_create_qp *ucmd)
 222 {
 223         struct mlx5_general_caps *gen;
 224         int wqe_size;
 225         int wq_size;
 226
 227         gen = &dev->mdev->caps.gen;
 228         /* Sanity check RQ size before proceeding */
 229         if (cap->max_recv_wr  > gen->max_wqes)
 230                 return -EINVAL;
 231
 232         if (!has_rq) {
 233                 qp->rq.max_gs = 0;
 234                 qp->rq.wqe_cnt = 0;
 235                 qp->rq.wqe_shift = 0;
 236         } else {
 237                 if (ucmd) {
 238                         qp->rq.wqe_cnt = ucmd->rq_wqe_count;
 239                         qp->rq.wqe_shift = ucmd->rq_wqe_shift;
 240                         qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof(struct mlx5_wqe_data_seg) - qp->wq_sig;
 241                         qp->rq.max_post = qp->rq.wqe_cnt;
 242                 } else {
 243                         wqe_size = qp->wq_sig ? sizeof(struct mlx5_wqe_signature_seg) : 0;
 244                         wqe_size += cap->max_recv_sge * sizeof(struct mlx5_wqe_data_seg);
 245                         wqe_size = roundup_pow_of_two(wqe_size);
 246                         wq_size = roundup_pow_of_two(cap->max_recv_wr) * wqe_size;
 247                         wq_size = max_t(int, wq_size, MLX5_SEND_WQE_BB);
 248                         qp->rq.wqe_cnt = wq_size / wqe_size;
 249                         if (wqe_size > gen->max_rq_desc_sz) {
 250                                 mlx5_ib_dbg(dev, "wqe_size %d, max %d\n",
 251                                             wqe_size,
 252                                             gen->max_rq_desc_sz);
 253                                 return -EINVAL;
 254                         }
 255                         qp->rq.wqe_shift = ilog2(wqe_size);
 256                         qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof(struct mlx5_wqe_data_seg) - qp->wq_sig;
 257                         qp->rq.max_post = qp->rq.wqe_cnt;
 258                 }
 259         }
 260
 261         return 0;
 262 }
 263
 264 static int sq_overhead(enum ib_qp_type qp_type)
 265 {
 266         int size = 0;
 267
 268         switch (qp_type) {
 269         case IB_QPT_XRC_INI:
 270                 size += sizeof(struct mlx5_wqe_xrc_seg);
 271                 /* fall through */
 272         case IB_QPT_RC:
 273                 size += sizeof(struct mlx5_wqe_ctrl_seg) +
 274                         sizeof(struct mlx5_wqe_atomic_seg) +
 275                         sizeof(struct mlx5_wqe_raddr_seg);
 276                 break;
 277
 278         case IB_QPT_XRC_TGT:
 279                 return 0;
 280
 281         case IB_QPT_UC:
 282                 size += sizeof(struct mlx5_wqe_ctrl_seg) +
 283                         sizeof(struct mlx5_wqe_raddr_seg) +
 284                         sizeof(struct mlx5_wqe_umr_ctrl_seg) +
 285                         sizeof(struct mlx5_mkey_seg);
 286                 break;
 287
 288         case IB_QPT_UD:
 289         case IB_QPT_SMI:
 290         case IB_QPT_GSI:
 291                 size += sizeof(struct mlx5_wqe_ctrl_seg) +
 292                         sizeof(struct mlx5_wqe_datagram_seg);
 293                 break;
 294
 295         case MLX5_IB_QPT_REG_UMR:
 296                 size += sizeof(struct mlx5_wqe_ctrl_seg) +
 297                         sizeof(struct mlx5_wqe_umr_ctrl_seg) +
 298                         sizeof(struct mlx5_mkey_seg);
 299                 break;
 300
 301         default:
 302                 return -EINVAL;
 303         }
 304
 305         return size;
 306 }
 307
 308 static int calc_send_wqe(struct ib_qp_init_attr *attr)
 309 {
 310         int inl_size = 0;
 311         int size;
 312
 313         size = sq_overhead(attr->qp_type);
 314         if (size < 0)
 315                 return size;
 316
 317         if (attr->cap.max_inline_data) {
 318                 inl_size = size + sizeof(struct mlx5_wqe_inline_seg) +
 319                         attr->cap.max_inline_data;
 320         }
 321
 322         size += attr->cap.max_send_sge * sizeof(struct mlx5_wqe_data_seg);
 323         if (attr->create_flags & IB_QP_CREATE_SIGNATURE_EN &&
 324             ALIGN(max_t(int, inl_size, size), MLX5_SEND_WQE_BB) < MLX5_SIG_WQE_SIZE)
 325                         return MLX5_SIG_WQE_SIZE;
 326         else
 327                 return ALIGN(max_t(int, inl_size, size), MLX5_SEND_WQE_BB);
 328 }
 329
 330 static int calc_sq_size(struct mlx5_ib_dev *dev, struct ib_qp_init_attr *attr,
 331                         struct mlx5_ib_qp *qp)
 332 {
 333         struct mlx5_general_caps *gen;
 334         int wqe_size;
 335         int wq_size;
 336
 337         gen = &dev->mdev->caps.gen;
 338         if (!attr->cap.max_send_wr)
 339                 return 0;
 340
 341         wqe_size = calc_send_wqe(attr);
 342         mlx5_ib_dbg(dev, "wqe_size %d\n", wqe_size);
 343         if (wqe_size < 0)
 344                 return wqe_size;
 345
 346         if (wqe_size > gen->max_sq_desc_sz) {
 347                 mlx5_ib_dbg(dev, "wqe_size(%d) > max_sq_desc_sz(%d)\n",
 348                             wqe_size, gen->max_sq_desc_sz);
 349                 return -EINVAL;
 350         }
 351
 352         qp->max_inline_data = wqe_size - sq_overhead(attr->qp_type) -
 353                 sizeof(struct mlx5_wqe_inline_seg);
 354         attr->cap.max_inline_data = qp->max_inline_data;
 355
 356         if (attr->create_flags & IB_QP_CREATE_SIGNATURE_EN)
 357                 qp->signature_en = true;
 358
 359         wq_size = roundup_pow_of_two(attr->cap.max_send_wr * wqe_size);
 360         qp->sq.wqe_cnt = wq_size / MLX5_SEND_WQE_BB;
 361         if (qp->sq.wqe_cnt > gen->max_wqes) {
 362                 mlx5_ib_dbg(dev, "wqe count(%d) exceeds limits(%d)\n",
 363                             qp->sq.wqe_cnt, gen->max_wqes);
 364                 return -ENOMEM;
 365         }
 366         qp->sq.wqe_shift = ilog2(MLX5_SEND_WQE_BB);
 367         qp->sq.max_gs = attr->cap.max_send_sge;
 368         qp->sq.max_post = wq_size / wqe_size;
 369         attr->cap.max_send_wr = qp->sq.max_post;
 370
 371         return wq_size;
 372 }
 373
 374 static int set_user_buf_size(struct mlx5_ib_dev *dev,
 375                             struct mlx5_ib_qp *qp,
 376                             struct mlx5_ib_create_qp *ucmd)
 377 {
 378         struct mlx5_general_caps *gen;
 379         int desc_sz = 1 << qp->sq.wqe_shift;
 380
 381         gen = &dev->mdev->caps.gen;
 382         if (desc_sz > gen->max_sq_desc_sz) {
 383                 mlx5_ib_warn(dev, "desc_sz %d, max_sq_desc_sz %d\n",
 384                              desc_sz, gen->max_sq_desc_sz);
 385                 return -EINVAL;
 386         }
 387
 388         if (ucmd->sq_wqe_count && ((1 << ilog2(ucmd->sq_wqe_count)) != ucmd->sq_wqe_count)) {
 389                 mlx5_ib_warn(dev, "sq_wqe_count %d, sq_wqe_count %d\n",
 390                              ucmd->sq_wqe_count, ucmd->sq_wqe_count);
 391                 return -EINVAL;
 392         }
 393
 394         qp->sq.wqe_cnt = ucmd->sq_wqe_count;
 395
 396         if (qp->sq.wqe_cnt > gen->max_wqes) {
 397                 mlx5_ib_warn(dev, "wqe_cnt %d, max_wqes %d\n",
 398                              qp->sq.wqe_cnt, gen->max_wqes);
 399                 return -EINVAL;
 400         }
 401
 402         qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
 403                 (qp->sq.wqe_cnt << 6);
 404
 405         return 0;
 406 }
 407
 408 static int qp_has_rq(struct ib_qp_init_attr *attr)
 409 {
 410         if (attr->qp_type == IB_QPT_XRC_INI ||
 411             attr->qp_type == IB_QPT_XRC_TGT || attr->srq ||
 412             attr->qp_type == MLX5_IB_QPT_REG_UMR ||
 413             !attr->cap.max_recv_wr)
 414                 return 0;
 415
 416         return 1;
 417 }
 418
 419 static int first_med_uuar(void)
 420 {
 421         return 1;
 422 }
 423
 424 static int next_uuar(int n)
 425 {
 426         n++;
 427
 428         while (((n % 4) & 2))
 429                 n++;
 430
 431         return n;
 432 }
 433
 434 static int num_med_uuar(struct mlx5_uuar_info *uuari)
 435 {
 436         int n;
 437
 438         n = uuari->num_uars * MLX5_NON_FP_BF_REGS_PER_PAGE -
 439                 uuari->num_low_latency_uuars - 1;
 440
 441         return n >= 0 ? n : 0;
 442 }
 443
 444 static int max_uuari(struct mlx5_uuar_info *uuari)
 445 {
 446         return uuari->num_uars * 4;
 447 }
 448
 449 static int first_hi_uuar(struct mlx5_uuar_info *uuari)
 450 {
 451         int med;
 452         int i;
 453         int t;
 454
 455         med = num_med_uuar(uuari);
 456         for (t = 0, i = first_med_uuar();; i = next_uuar(i)) {
 457                 t++;
 458                 if (t == med)
 459                         return next_uuar(i);
 460         }
 461
 462         return 0;
 463 }
 464
 465 static int alloc_high_class_uuar(struct mlx5_uuar_info *uuari)
 466 {
 467         int i;
 468
 469         for (i = first_hi_uuar(uuari); i < max_uuari(uuari); i = next_uuar(i)) {
 470                 if (!test_bit(i, uuari->bitmap)) {
 471                         set_bit(i, uuari->bitmap);
 472                         uuari->count[i]++;
 473                         return i;
 474                 }
 475         }
 476
 477         return -ENOMEM;
 478 }
 479
 480 static int alloc_med_class_uuar(struct mlx5_uuar_info *uuari)
 481 {
 482         int minidx = first_med_uuar();
 483         int i;
 484
 485         for (i = first_med_uuar(); i < first_hi_uuar(uuari); i = next_uuar(i)) {
 486                 if (uuari->count[i] < uuari->count[minidx])
 487                         minidx = i;
 488         }
 489
 490         uuari->count[minidx]++;
 491         return minidx;
 492 }
 493
 494 static int alloc_uuar(struct mlx5_uuar_info *uuari,
 495                       enum mlx5_ib_latency_class lat)
 496 {
 497         int uuarn = -EINVAL;
 498
 499         mutex_lock(&uuari->lock);
 500         switch (lat) {
 501         case MLX5_IB_LATENCY_CLASS_LOW:
 502                 uuarn = 0;
 503                 uuari->count[uuarn]++;
 504                 break;
 505
 506         case MLX5_IB_LATENCY_CLASS_MEDIUM:
 507                 if (uuari->ver < 2)
 508                         uuarn = -ENOMEM;
 509                 else
 510                         uuarn = alloc_med_class_uuar(uuari);
 511                 break;
 512
 513         case MLX5_IB_LATENCY_CLASS_HIGH:
 514                 if (uuari->ver < 2)
 515                         uuarn = -ENOMEM;
 516                 else
 517                         uuarn = alloc_high_class_uuar(uuari);
 518                 break;
 519
 520         case MLX5_IB_LATENCY_CLASS_FAST_PATH:
 521                 uuarn = 2;
 522                 break;
 523         }
 524         mutex_unlock(&uuari->lock);
 525
 526         return uuarn;
 527 }
 528
 529 static void free_med_class_uuar(struct mlx5_uuar_info *uuari, int uuarn)
 530 {
 531         clear_bit(uuarn, uuari->bitmap);
 532         --uuari->count[uuarn];
 533 }
 534
 535 static void free_high_class_uuar(struct mlx5_uuar_info *uuari, int uuarn)
 536 {
 537         clear_bit(uuarn, uuari->bitmap);
 538         --uuari->count[uuarn];
 539 }
 540
 541 static void free_uuar(struct mlx5_uuar_info *uuari, int uuarn)
 542 {
 543         int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE;
 544         int high_uuar = nuuars - uuari->num_low_latency_uuars;
 545
 546         mutex_lock(&uuari->lock);
 547         if (uuarn == 0) {
 548                 --uuari->count[uuarn];
 549                 goto out;
 550         }
 551
 552         if (uuarn < high_uuar) {
 553                 free_med_class_uuar(uuari, uuarn);
 554                 goto out;
 555         }
 556
 557         free_high_class_uuar(uuari, uuarn);
 558
 559 out:
 560         mutex_unlock(&uuari->lock);
 561 }
 562
 563 static enum mlx5_qp_state to_mlx5_state(enum ib_qp_state state)
 564 {
 565         switch (state) {
 566         case IB_QPS_RESET:      return MLX5_QP_STATE_RST;
 567         case IB_QPS_INIT:       return MLX5_QP_STATE_INIT;
 568         case IB_QPS_RTR:        return MLX5_QP_STATE_RTR;
 569         case IB_QPS_RTS:        return MLX5_QP_STATE_RTS;
 570         case IB_QPS_SQD:        return MLX5_QP_STATE_SQD;
 571         case IB_QPS_SQE:        return MLX5_QP_STATE_SQER;
 572         case IB_QPS_ERR:        return MLX5_QP_STATE_ERR;
 573         default:                return -1;
 574         }
 575 }
 576
 577 static int to_mlx5_st(enum ib_qp_type type)
 578 {
 579         switch (type) {
 580         case IB_QPT_RC:                 return MLX5_QP_ST_RC;
 581         case IB_QPT_UC:                 return MLX5_QP_ST_UC;
 582         case IB_QPT_UD:                 return MLX5_QP_ST_UD;
 583         case MLX5_IB_QPT_REG_UMR:       return MLX5_QP_ST_REG_UMR;
 584         case IB_QPT_XRC_INI:
 585         case IB_QPT_XRC_TGT:            return MLX5_QP_ST_XRC;
 586         case IB_QPT_SMI:                return MLX5_QP_ST_QP0;
 587         case IB_QPT_GSI:                return MLX5_QP_ST_QP1;
 588         case IB_QPT_RAW_IPV6:           return MLX5_QP_ST_RAW_IPV6;
 589         case IB_QPT_RAW_ETHERTYPE:      return MLX5_QP_ST_RAW_ETHERTYPE;
 590         case IB_QPT_RAW_PACKET:
 591         case IB_QPT_MAX:
 592         default:                return -EINVAL;
 593         }
 594 }
 595
 596 static int uuarn_to_uar_index(struct mlx5_uuar_info *uuari, int uuarn)
 597 {
 598         return uuari->uars[uuarn / MLX5_BF_REGS_PER_PAGE].index;
 599 }
 600
 601 static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
 602                           struct mlx5_ib_qp *qp, struct ib_udata *udata,
 603                           struct mlx5_create_qp_mbox_in **in,
 604                           struct mlx5_ib_create_qp_resp *resp, int *inlen)
 605 {
 606         struct mlx5_ib_ucontext *context;
 607         struct mlx5_ib_create_qp ucmd;
 608         int page_shift = 0;
 609         int uar_index;
 610         int npages;
 611         u32 offset = 0;
 612         int uuarn;
 613         int ncont = 0;
 614         int err;
 615
 616         err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
 617         if (err) {
 618                 mlx5_ib_dbg(dev, "copy failed\n");
 619                 return err;
 620         }
 621
 622         context = to_mucontext(pd->uobject->context);
 623         /*
 624          * TBD: should come from the verbs when we have the API
 625          */
 626         uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_HIGH);
 627         if (uuarn < 0) {
 628                 mlx5_ib_dbg(dev, "failed to allocate low latency UUAR\n");
 629                 mlx5_ib_dbg(dev, "reverting to medium latency\n");
 630                 uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_MEDIUM);
 631                 if (uuarn < 0) {
 632                         mlx5_ib_dbg(dev, "failed to allocate medium latency UUAR\n");
 633                         mlx5_ib_dbg(dev, "reverting to high latency\n");
 634                         uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_LOW);
 635                         if (uuarn < 0) {
 636                                 mlx5_ib_warn(dev, "uuar allocation failed\n");
 637                                 return uuarn;
 638                         }
 639                 }
 640         }
 641
 642         uar_index = uuarn_to_uar_index(&context->uuari, uuarn);
 643         mlx5_ib_dbg(dev, "uuarn 0x%x, uar_index 0x%x\n", uuarn, uar_index);
 644
 645         qp->rq.offset = 0;
 646         qp->sq.wqe_shift = ilog2(MLX5_SEND_WQE_BB);
 647         qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
 648
 649         err = set_user_buf_size(dev, qp, &ucmd);
 650         if (err)
 651                 goto err_uuar;
 652
 653         if (ucmd.buf_addr && qp->buf_size) {
 654                 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
 655                                        qp->buf_size, 0, 0);
 656                 if (IS_ERR(qp->umem)) {
 657                         mlx5_ib_dbg(dev, "umem_get failed\n");
 658                         err = PTR_ERR(qp->umem);
 659                         goto err_uuar;
 660                 }
 661         } else {
 662                 qp->umem = NULL;
 663         }
 664
 665         if (qp->umem) {
 666                 mlx5_ib_cont_pages(qp->umem, ucmd.buf_addr, &npages, &page_shift,
 667                                    &ncont, NULL);
 668                 err = mlx5_ib_get_buf_offset(ucmd.buf_addr, page_shift, &offset);
 669                 if (err) {
 670                         mlx5_ib_warn(dev, "bad offset\n");
 671                         goto err_umem;
 672                 }
 673                 mlx5_ib_dbg(dev, "addr 0x%llx, size %d, npages %d, page_shift %d, ncont %d, offset %d\n",
 674                             ucmd.buf_addr, qp->buf_size, npages, page_shift, ncont, offset);
 675         }
 676
 677         *inlen = sizeof(**in) + sizeof(*(*in)->pas) * ncont;
 678         *in = mlx5_vzalloc(*inlen);
 679         if (!*in) {
 680                 err = -ENOMEM;
 681                 goto err_umem;
 682         }
 683         if (qp->umem)
 684                 mlx5_ib_populate_pas(dev, qp->umem, page_shift, (*in)->pas, 0);
 685         (*in)->ctx.log_pg_sz_remote_qpn =
 686                 cpu_to_be32((page_shift - MLX5_ADAPTER_PAGE_SHIFT) << 24);
 687         (*in)->ctx.params2 = cpu_to_be32(offset << 6);
 688
 689         (*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index);
 690         resp->uuar_index = uuarn;
 691         qp->uuarn = uuarn;
 692
 693         err = mlx5_ib_db_map_user(context, ucmd.db_addr, &qp->db);
 694         if (err) {
 695                 mlx5_ib_dbg(dev, "map failed\n");
 696                 goto err_free;
 697         }
 698
 699         err = ib_copy_to_udata(udata, resp, sizeof(*resp));
 700         if (err) {
 701                 mlx5_ib_dbg(dev, "copy failed\n");
 702                 goto err_unmap;
 703         }
 704         qp->create_type = MLX5_QP_USER;
 705
 706         return 0;
 707
 708 err_unmap:
 709         mlx5_ib_db_unmap_user(context, &qp->db);
 710
 711 err_free:
 712         kvfree(*in);
 713
 714 err_umem:
 715         if (qp->umem)
 716                 ib_umem_release(qp->umem);
 717
 718 err_uuar:
 719         free_uuar(&context->uuari, uuarn);
 720         return err;
 721 }
 722
 723 static void destroy_qp_user(struct ib_pd *pd, struct mlx5_ib_qp *qp)
 724 {
 725         struct mlx5_ib_ucontext *context;
 726
 727         context = to_mucontext(pd->uobject->context);
 728         mlx5_ib_db_unmap_user(context, &qp->db);
 729         if (qp->umem)
 730                 ib_umem_release(qp->umem);
 731         free_uuar(&context->uuari, qp->uuarn);
 732 }
 733
 734 static int create_kernel_qp(struct mlx5_ib_dev *dev,
 735                             struct ib_qp_init_attr *init_attr,
 736                             struct mlx5_ib_qp *qp,
 737                             struct mlx5_create_qp_mbox_in **in, int *inlen)
 738 {
 739         enum mlx5_ib_latency_class lc = MLX5_IB_LATENCY_CLASS_LOW;
 740         struct mlx5_uuar_info *uuari;
 741         int uar_index;
 742         int uuarn;
 743         int err;
 744
 745         uuari = &dev->mdev->priv.uuari;
 746         if (init_attr->create_flags & ~(IB_QP_CREATE_SIGNATURE_EN | IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK))
 747                 return -EINVAL;
 748
 749         if (init_attr->qp_type == MLX5_IB_QPT_REG_UMR)
 750                 lc = MLX5_IB_LATENCY_CLASS_FAST_PATH;
 751
 752         uuarn = alloc_uuar(uuari, lc);
 753         if (uuarn < 0) {
 754                 mlx5_ib_dbg(dev, "\n");
 755                 return -ENOMEM;
 756         }
 757
 758         qp->bf = &uuari->bfs[uuarn];
 759         uar_index = qp->bf->uar->index;
 760
 761         err = calc_sq_size(dev, init_attr, qp);
 762         if (err < 0) {
 763                 mlx5_ib_dbg(dev, "err %d\n", err);
 764                 goto err_uuar;
 765         }
 766
 767         qp->rq.offset = 0;
 768         qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
 769         qp->buf_size = err + (qp->rq.wqe_cnt << qp->rq.wqe_shift);
 770
 771         err = mlx5_buf_alloc(dev->mdev, qp->buf_size, PAGE_SIZE * 2, &qp->buf);
 772         if (err) {
 773                 mlx5_ib_dbg(dev, "err %d\n", err);
 774                 goto err_uuar;
 775         }
 776
 777         qp->sq.qend = mlx5_get_send_wqe(qp, qp->sq.wqe_cnt);
 778         *inlen = sizeof(**in) + sizeof(*(*in)->pas) * qp->buf.npages;
 779         *in = mlx5_vzalloc(*inlen);
 780         if (!*in) {
 781                 err = -ENOMEM;
 782                 goto err_buf;
 783         }
 784         (*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index);
 785         (*in)->ctx.log_pg_sz_remote_qpn =
 786                 cpu_to_be32((qp->buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT) << 24);
 787         /* Set "fast registration enabled" for all kernel QPs */
 788         (*in)->ctx.params1 |= cpu_to_be32(1 << 11);
 789         (*in)->ctx.sq_crq_size |= cpu_to_be16(1 << 4);
 790
 791         mlx5_fill_page_array(&qp->buf, (*in)->pas);
 792
 793         err = mlx5_db_alloc(dev->mdev, &qp->db);
 794         if (err) {
 795                 mlx5_ib_dbg(dev, "err %d\n", err);
 796                 goto err_free;
 797         }
 798
 799         qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wrid), GFP_KERNEL);
 800         qp->sq.wr_data = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wr_data), GFP_KERNEL);
 801         qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof(*qp->rq.wrid), GFP_KERNEL);
 802         qp->sq.w_list = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.w_list), GFP_KERNEL);
 803         qp->sq.wqe_head = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wqe_head), GFP_KERNEL);
 804
 805         if (!qp->sq.wrid || !qp->sq.wr_data || !qp->rq.wrid ||
 806             !qp->sq.w_list || !qp->sq.wqe_head) {
 807                 err = -ENOMEM;
 808                 goto err_wrid;
 809         }
 810         qp->create_type = MLX5_QP_KERNEL;
 811
 812         return 0;
 813
 814 err_wrid:
 815         mlx5_db_free(dev->mdev, &qp->db);
 816         kfree(qp->sq.wqe_head);
 817         kfree(qp->sq.w_list);
 818         kfree(qp->sq.wrid);
 819         kfree(qp->sq.wr_data);
 820         kfree(qp->rq.wrid);
 821
 822 err_free:
 823         kvfree(*in);
 824
 825 err_buf:
 826         mlx5_buf_free(dev->mdev, &qp->buf);
 827
 828 err_uuar:
 829         free_uuar(&dev->mdev->priv.uuari, uuarn);
 830         return err;
 831 }
 832
 833 static void destroy_qp_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp)
 834 {
 835         mlx5_db_free(dev->mdev, &qp->db);
 836         kfree(qp->sq.wqe_head);
 837         kfree(qp->sq.w_list);
 838         kfree(qp->sq.wrid);
 839         kfree(qp->sq.wr_data);
 840         kfree(qp->rq.wrid);
 841         mlx5_buf_free(dev->mdev, &qp->buf);
 842         free_uuar(&dev->mdev->priv.uuari, qp->bf->uuarn);
 843 }
 844
 845 static __be32 get_rx_type(struct mlx5_ib_qp *qp, struct ib_qp_init_attr *attr)
 846 {
 847         if (attr->srq || (attr->qp_type == IB_QPT_XRC_TGT) ||
 848             (attr->qp_type == IB_QPT_XRC_INI))
 849                 return cpu_to_be32(MLX5_SRQ_RQ);
 850         else if (!qp->has_rq)
 851                 return cpu_to_be32(MLX5_ZERO_LEN_RQ);
 852         else
 853                 return cpu_to_be32(MLX5_NON_ZERO_RQ);
 854 }
 855
 856 static int is_connected(enum ib_qp_type qp_type)
 857 {
 858         if (qp_type == IB_QPT_RC || qp_type == IB_QPT_UC)
 859                 return 1;
 860
 861         return 0;
 862 }
 863
 864 static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
 865                             struct ib_qp_init_attr *init_attr,
 866                             struct ib_udata *udata, struct mlx5_ib_qp *qp)
 867 {
 868         struct mlx5_ib_resources *devr = &dev->devr;
 869         struct mlx5_ib_create_qp_resp resp;
 870         struct mlx5_create_qp_mbox_in *in;
 871         struct mlx5_general_caps *gen;
 872         struct mlx5_ib_create_qp ucmd;
 873         int inlen = sizeof(*in);
 874         int err;
 875
 876         mlx5_ib_odp_create_qp(qp);
 877
 878         gen = &dev->mdev->caps.gen;
 879         mutex_init(&qp->mutex);
 880         spin_lock_init(&qp->sq.lock);
 881         spin_lock_init(&qp->rq.lock);
 882
 883         if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) {
 884                 if (!(gen->flags & MLX5_DEV_CAP_FLAG_BLOCK_MCAST)) {
 885                         mlx5_ib_dbg(dev, "block multicast loopback isn't supported\n");
 886                         return -EINVAL;
 887                 } else {
 888                         qp->flags |= MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK;
 889                 }
 890         }
 891
 892         if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
 893                 qp->sq_signal_bits = MLX5_WQE_CTRL_CQ_UPDATE;
 894
 895         if (pd && pd->uobject) {
 896                 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
 897                         mlx5_ib_dbg(dev, "copy failed\n");
 898                         return -EFAULT;
 899                 }
 900
 901                 qp->wq_sig = !!(ucmd.flags & MLX5_QP_FLAG_SIGNATURE);
 902                 qp->scat_cqe = !!(ucmd.flags & MLX5_QP_FLAG_SCATTER_CQE);
 903         } else {
 904                 qp->wq_sig = !!wq_signature;
 905         }
 906
 907         qp->has_rq = qp_has_rq(init_attr);
 908         err = set_rq_size(dev, &init_attr->cap, qp->has_rq,
 909                           qp, (pd && pd->uobject) ? &ucmd : NULL);
 910         if (err) {
 911                 mlx5_ib_dbg(dev, "err %d\n", err);
 912                 return err;
 913         }
 914
 915         if (pd) {
 916                 if (pd->uobject) {
 917                         mlx5_ib_dbg(dev, "requested sq_wqe_count (%d)\n", ucmd.sq_wqe_count);
 918                         if (ucmd.rq_wqe_shift != qp->rq.wqe_shift ||
 919                             ucmd.rq_wqe_count != qp->rq.wqe_cnt) {
 920                                 mlx5_ib_dbg(dev, "invalid rq params\n");
 921                                 return -EINVAL;
 922                         }
 923                         if (ucmd.sq_wqe_count > gen->max_wqes) {
 924                                 mlx5_ib_dbg(dev, "requested sq_wqe_count (%d) > max allowed (%d)\n",
 925                                             ucmd.sq_wqe_count, gen->max_wqes);
 926                                 return -EINVAL;
 927                         }
 928                         err = create_user_qp(dev, pd, qp, udata, &in, &resp, &inlen);
 929                         if (err)
 930                                 mlx5_ib_dbg(dev, "err %d\n", err);
 931                 } else {
 932                         err = create_kernel_qp(dev, init_attr, qp, &in, &inlen);
 933                         if (err)
 934                                 mlx5_ib_dbg(dev, "err %d\n", err);
 935                         else
 936                                 qp->pa_lkey = to_mpd(pd)->pa_lkey;
 937                 }
 938
 939                 if (err)
 940                         return err;
 941         } else {
 942                 in = mlx5_vzalloc(sizeof(*in));
 943                 if (!in)
 944                         return -ENOMEM;
 945
 946                 qp->create_type = MLX5_QP_EMPTY;
 947         }
 948
 949         if (is_sqp(init_attr->qp_type))
 950                 qp->port = init_attr->port_num;
 951
 952         in->ctx.flags = cpu_to_be32(to_mlx5_st(init_attr->qp_type) << 16 |
 953                                     MLX5_QP_PM_MIGRATED << 11);
 954
 955         if (init_attr->qp_type != MLX5_IB_QPT_REG_UMR)
 956                 in->ctx.flags_pd = cpu_to_be32(to_mpd(pd ? pd : devr->p0)->pdn);
 957         else
 958                 in->ctx.flags_pd = cpu_to_be32(MLX5_QP_LAT_SENSITIVE);
 959
 960         if (qp->wq_sig)
 961                 in->ctx.flags_pd |= cpu_to_be32(MLX5_QP_ENABLE_SIG);
 962
 963         if (qp->flags & MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK)
 964                 in->ctx.flags_pd |= cpu_to_be32(MLX5_QP_BLOCK_MCAST);
 965
 966         if (qp->scat_cqe && is_connected(init_attr->qp_type)) {
 967                 int rcqe_sz;
 968                 int scqe_sz;
 969
 970                 rcqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->recv_cq);
 971                 scqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->send_cq);
 972
 973                 if (rcqe_sz == 128)
 974                         in->ctx.cs_res = MLX5_RES_SCAT_DATA64_CQE;
 975                 else
 976                         in->ctx.cs_res = MLX5_RES_SCAT_DATA32_CQE;
 977
 978                 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) {
 979                         if (scqe_sz == 128)
 980                                 in->ctx.cs_req = MLX5_REQ_SCAT_DATA64_CQE;
 981                         else
 982                                 in->ctx.cs_req = MLX5_REQ_SCAT_DATA32_CQE;
 983                 }
 984         }
 985
 986         if (qp->rq.wqe_cnt) {
 987                 in->ctx.rq_size_stride = (qp->rq.wqe_shift - 4);
 988                 in->ctx.rq_size_stride |= ilog2(qp->rq.wqe_cnt) << 3;
 989         }
 990
 991         in->ctx.rq_type_srqn = get_rx_type(qp, init_attr);
 992
 993         if (qp->sq.wqe_cnt)
 994                 in->ctx.sq_crq_size |= cpu_to_be16(ilog2(qp->sq.wqe_cnt) << 11);
 995         else
 996                 in->ctx.sq_crq_size |= cpu_to_be16(0x8000);
 997
 998         /* Set default resources */
 999         switch (init_attr->qp_type) {
1000         case IB_QPT_XRC_TGT:
1001                 in->ctx.cqn_recv = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn);
1002                 in->ctx.cqn_send = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn);
1003                 in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn);
1004                 in->ctx.xrcd = cpu_to_be32(to_mxrcd(init_attr->xrcd)->xrcdn);
1005                 break;
1006         case IB_QPT_XRC_INI:
1007                 in->ctx.cqn_recv = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn);
1008                 in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x1)->xrcdn);
1009                 in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn);
1010                 break;
1011         default:
1012                 if (init_attr->srq) {
1013                         in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x0)->xrcdn);
1014                         in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(init_attr->srq)->msrq.srqn);
1015                 } else {
1016                         in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x1)->xrcdn);
1017                         in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn);
1018                 }
1019         }
1020
1021         if (init_attr->send_cq)
1022                 in->ctx.cqn_send = cpu_to_be32(to_mcq(init_attr->send_cq)->mcq.cqn);
1023
1024         if (init_attr->recv_cq)
1025                 in->ctx.cqn_recv = cpu_to_be32(to_mcq(init_attr->recv_cq)->mcq.cqn);
1026
1027         in->ctx.db_rec_addr = cpu_to_be64(qp->db.dma);
1028
1029         err = mlx5_core_create_qp(dev->mdev, &qp->mqp, in, inlen);
1030         if (err) {
1031                 mlx5_ib_dbg(dev, "create qp failed\n");
1032                 goto err_create;
1033         }
1034
1035         kvfree(in);
1036         /* Hardware wants QPN written in big-endian order (after
1037          * shifting) for send doorbell.  Precompute this value to save
1038          * a little bit when posting sends.
1039          */
1040         qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
1041
1042         qp->mqp.event = mlx5_ib_qp_event;
1043
1044         return 0;
1045
1046 err_create:
1047         if (qp->create_type == MLX5_QP_USER)
1048                 destroy_qp_user(pd, qp);
1049         else if (qp->create_type == MLX5_QP_KERNEL)
1050                 destroy_qp_kernel(dev, qp);
1051
1052         kvfree(in);
1053         return err;
1054 }
1055
1056 static void mlx5_ib_lock_cqs(struct mlx5_ib_cq *send_cq, struct mlx5_ib_cq *recv_cq)
1057         __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
1058 {
1059         if (send_cq) {
1060                 if (recv_cq) {
1061                         if (send_cq->mcq.cqn < recv_cq->mcq.cqn)  {
1062                                 spin_lock_irq(&send_cq->lock);
1063                                 spin_lock_nested(&recv_cq->lock,
1064                                                  SINGLE_DEPTH_NESTING);
1065                         } else if (send_cq->mcq.cqn == recv_cq->mcq.cqn) {
1066                                 spin_lock_irq(&send_cq->lock);
1067                                 __acquire(&recv_cq->lock);
1068                         } else {
1069                                 spin_lock_irq(&recv_cq->lock);
1070                                 spin_lock_nested(&send_cq->lock,
1071                                                  SINGLE_DEPTH_NESTING);
1072                         }
1073                 } else {
1074                         spin_lock_irq(&send_cq->lock);
1075                         __acquire(&recv_cq->lock);
1076                 }
1077         } else if (recv_cq) {
1078                 spin_lock_irq(&recv_cq->lock);
1079                 __acquire(&send_cq->lock);
1080         } else {
1081                 __acquire(&send_cq->lock);
1082                 __acquire(&recv_cq->lock);
1083         }
1084 }
1085
1086 static void mlx5_ib_unlock_cqs(struct mlx5_ib_cq *send_cq, struct mlx5_ib_cq *recv_cq)
1087         __releases(&send_cq->lock) __releases(&recv_cq->lock)
1088 {
1089         if (send_cq) {
1090                 if (recv_cq) {
1091                         if (send_cq->mcq.cqn < recv_cq->mcq.cqn)  {
1092                                 spin_unlock(&recv_cq->lock);
1093                                 spin_unlock_irq(&send_cq->lock);
1094                         } else if (send_cq->mcq.cqn == recv_cq->mcq.cqn) {
1095                                 __release(&recv_cq->lock);
1096                                 spin_unlock_irq(&send_cq->lock);
1097                         } else {
1098                                 spin_unlock(&send_cq->lock);
1099                                 spin_unlock_irq(&recv_cq->lock);
1100                         }
1101                 } else {
1102                         __release(&recv_cq->lock);
1103                         spin_unlock_irq(&send_cq->lock);
1104                 }
1105         } else if (recv_cq) {
1106                 __release(&send_cq->lock);
1107                 spin_unlock_irq(&recv_cq->lock);
1108         } else {
1109                 __release(&recv_cq->lock);
1110                 __release(&send_cq->lock);
1111         }
1112 }
1113
1114 static struct mlx5_ib_pd *get_pd(struct mlx5_ib_qp *qp)
1115 {
1116         return to_mpd(qp->ibqp.pd);
1117 }
1118
1119 static void get_cqs(struct mlx5_ib_qp *qp,
1120                     struct mlx5_ib_cq **send_cq, struct mlx5_ib_cq **recv_cq)
1121 {
1122         switch (qp->ibqp.qp_type) {
1123         case IB_QPT_XRC_TGT:
1124                 *send_cq = NULL;
1125                 *recv_cq = NULL;
1126                 break;
1127         case MLX5_IB_QPT_REG_UMR:
1128         case IB_QPT_XRC_INI:
1129                 *send_cq = to_mcq(qp->ibqp.send_cq);
1130                 *recv_cq = NULL;
1131                 break;
1132
1133         case IB_QPT_SMI:
1134         case IB_QPT_GSI:
1135         case IB_QPT_RC:
1136         case IB_QPT_UC:
1137         case IB_QPT_UD:
1138         case IB_QPT_RAW_IPV6:
1139         case IB_QPT_RAW_ETHERTYPE:
1140                 *send_cq = to_mcq(qp->ibqp.send_cq);
1141                 *recv_cq = to_mcq(qp->ibqp.recv_cq);
1142                 break;
1143
1144         case IB_QPT_RAW_PACKET:
1145         case IB_QPT_MAX:
1146         default:
1147                 *send_cq = NULL;
1148                 *recv_cq = NULL;
1149                 break;
1150         }
1151 }
1152
1153 static void destroy_qp_common(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp)
1154 {
1155         struct mlx5_ib_cq *send_cq, *recv_cq;
1156         struct mlx5_modify_qp_mbox_in *in;
1157         int err;
1158
1159         in = kzalloc(sizeof(*in), GFP_KERNEL);
1160         if (!in)
1161                 return;
1162
1163         if (qp->state != IB_QPS_RESET) {
1164                 mlx5_ib_qp_disable_pagefaults(qp);
1165                 if (mlx5_core_qp_modify(dev->mdev, to_mlx5_state(qp->state),
1166                                         MLX5_QP_STATE_RST, in, 0, &qp->mqp))
1167                         mlx5_ib_warn(dev, "mlx5_ib: modify QP %06x to RESET failed\n",
1168                                      qp->mqp.qpn);
1169         }
1170
1171         get_cqs(qp, &send_cq, &recv_cq);
1172
1173         if (qp->create_type == MLX5_QP_KERNEL) {
1174                 mlx5_ib_lock_cqs(send_cq, recv_cq);
1175                 __mlx5_ib_cq_clean(recv_cq, qp->mqp.qpn,
1176                                    qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
1177                 if (send_cq != recv_cq)
1178                         __mlx5_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1179                 mlx5_ib_unlock_cqs(send_cq, recv_cq);
1180         }
1181
1182         err = mlx5_core_destroy_qp(dev->mdev, &qp->mqp);
1183         if (err)
1184                 mlx5_ib_warn(dev, "failed to destroy QP 0x%x\n", qp->mqp.qpn);
1185         kfree(in);
1186
1187
1188         if (qp->create_type == MLX5_QP_KERNEL)
1189                 destroy_qp_kernel(dev, qp);
1190         else if (qp->create_type == MLX5_QP_USER)
1191                 destroy_qp_user(&get_pd(qp)->ibpd, qp);
1192 }
1193
1194 static const char *ib_qp_type_str(enum ib_qp_type type)
1195 {
1196         switch (type) {
1197         case IB_QPT_SMI:
1198                 return "IB_QPT_SMI";
1199         case IB_QPT_GSI:
1200                 return "IB_QPT_GSI";
1201         case IB_QPT_RC:
1202                 return "IB_QPT_RC";
1203         case IB_QPT_UC:
1204                 return "IB_QPT_UC";
1205         case IB_QPT_UD:
1206                 return "IB_QPT_UD";
1207         case IB_QPT_RAW_IPV6:
1208                 return "IB_QPT_RAW_IPV6";
1209         case IB_QPT_RAW_ETHERTYPE:
1210                 return "IB_QPT_RAW_ETHERTYPE";
1211         case IB_QPT_XRC_INI:
1212                 return "IB_QPT_XRC_INI";
1213         case IB_QPT_XRC_TGT:
1214                 return "IB_QPT_XRC_TGT";
1215         case IB_QPT_RAW_PACKET:
1216                 return "IB_QPT_RAW_PACKET";
1217         case MLX5_IB_QPT_REG_UMR:
1218                 return "MLX5_IB_QPT_REG_UMR";
1219         case IB_QPT_MAX:
1220         default:
1221                 return "Invalid QP type";
1222         }
1223 }
1224
1225 struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd,
1226                                 struct ib_qp_init_attr *init_attr,
1227                                 struct ib_udata *udata)
1228 {
1229         struct mlx5_general_caps *gen;
1230         struct mlx5_ib_dev *dev;
1231         struct mlx5_ib_qp *qp;
1232         u16 xrcdn = 0;
1233         int err;
1234
1235         if (pd) {
1236                 dev = to_mdev(pd->device);
1237         } else {
1238                 /* being cautious here */
1239                 if (init_attr->qp_type != IB_QPT_XRC_TGT &&
1240                     init_attr->qp_type != MLX5_IB_QPT_REG_UMR) {
1241                         pr_warn("%s: no PD for transport %s\n", __func__,
1242                                 ib_qp_type_str(init_attr->qp_type));
1243                         return ERR_PTR(-EINVAL);
1244                 }
1245                 dev = to_mdev(to_mxrcd(init_attr->xrcd)->ibxrcd.device);
1246         }
1247         gen = &dev->mdev->caps.gen;
1248
1249         switch (init_attr->qp_type) {
1250         case IB_QPT_XRC_TGT:
1251         case IB_QPT_XRC_INI:
1252                 if (!(gen->flags & MLX5_DEV_CAP_FLAG_XRC)) {
1253                         mlx5_ib_dbg(dev, "XRC not supported\n");
1254                         return ERR_PTR(-ENOSYS);
1255                 }
1256                 init_attr->recv_cq = NULL;
1257                 if (init_attr->qp_type == IB_QPT_XRC_TGT) {
1258                         xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1259                         init_attr->send_cq = NULL;
1260                 }
1261
1262                 /* fall through */
1263         case IB_QPT_RC:
1264         case IB_QPT_UC:
1265         case IB_QPT_UD:
1266         case IB_QPT_SMI:
1267         case IB_QPT_GSI:
1268         case MLX5_IB_QPT_REG_UMR:
1269                 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
1270                 if (!qp)
1271                         return ERR_PTR(-ENOMEM);
1272
1273                 err = create_qp_common(dev, pd, init_attr, udata, qp);
1274                 if (err) {
1275                         mlx5_ib_dbg(dev, "create_qp_common failed\n");
1276                         kfree(qp);
1277                         return ERR_PTR(err);
1278                 }
1279
1280                 if (is_qp0(init_attr->qp_type))
1281                         qp->ibqp.qp_num = 0;
1282                 else if (is_qp1(init_attr->qp_type))
1283                         qp->ibqp.qp_num = 1;
1284                 else
1285                         qp->ibqp.qp_num = qp->mqp.qpn;
1286
1287                 mlx5_ib_dbg(dev, "ib qpnum 0x%x, mlx qpn 0x%x, rcqn 0x%x, scqn 0x%x\n",
1288                             qp->ibqp.qp_num, qp->mqp.qpn, to_mcq(init_attr->recv_cq)->mcq.cqn,
1289                             to_mcq(init_attr->send_cq)->mcq.cqn);
1290
1291                 qp->xrcdn = xrcdn;
1292
1293                 break;
1294
1295         case IB_QPT_RAW_IPV6:
1296         case IB_QPT_RAW_ETHERTYPE:
1297         case IB_QPT_RAW_PACKET:
1298         case IB_QPT_MAX:
1299         default:
1300                 mlx5_ib_dbg(dev, "unsupported qp type %d\n",
1301                             init_attr->qp_type);
1302                 /* Don't support raw QPs */
1303                 return ERR_PTR(-EINVAL);
1304         }
1305
1306         return &qp->ibqp;
1307 }
1308
1309 int mlx5_ib_destroy_qp(struct ib_qp *qp)
1310 {
1311         struct mlx5_ib_dev *dev = to_mdev(qp->device);
1312         struct mlx5_ib_qp *mqp = to_mqp(qp);
1313
1314         destroy_qp_common(dev, mqp);
1315
1316         kfree(mqp);
1317
1318         return 0;
1319 }
1320
1321 static __be32 to_mlx5_access_flags(struct mlx5_ib_qp *qp, const struct ib_qp_attr *attr,
1322                                    int attr_mask)
1323 {
1324         u32 hw_access_flags = 0;
1325         u8 dest_rd_atomic;
1326         u32 access_flags;
1327
1328         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1329                 dest_rd_atomic = attr->max_dest_rd_atomic;
1330         else
1331                 dest_rd_atomic = qp->resp_depth;
1332
1333         if (attr_mask & IB_QP_ACCESS_FLAGS)
1334                 access_flags = attr->qp_access_flags;
1335         else
1336                 access_flags = qp->atomic_rd_en;
1337
1338         if (!dest_rd_atomic)
1339                 access_flags &= IB_ACCESS_REMOTE_WRITE;
1340
1341         if (access_flags & IB_ACCESS_REMOTE_READ)
1342                 hw_access_flags |= MLX5_QP_BIT_RRE;
1343         if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1344                 hw_access_flags |= (MLX5_QP_BIT_RAE | MLX5_ATOMIC_MODE_CX);
1345         if (access_flags & IB_ACCESS_REMOTE_WRITE)
1346                 hw_access_flags |= MLX5_QP_BIT_RWE;
1347
1348         return cpu_to_be32(hw_access_flags);
1349 }
1350
1351 enum {
1352         MLX5_PATH_FLAG_FL       = 1 << 0,
1353         MLX5_PATH_FLAG_FREE_AR  = 1 << 1,
1354         MLX5_PATH_FLAG_COUNTER  = 1 << 2,
1355 };
1356
1357 static int ib_rate_to_mlx5(struct mlx5_ib_dev *dev, u8 rate)
1358 {
1359         struct mlx5_general_caps *gen;
1360
1361         gen = &dev->mdev->caps.gen;
1362         if (rate == IB_RATE_PORT_CURRENT) {
1363                 return 0;
1364         } else if (rate < IB_RATE_2_5_GBPS || rate > IB_RATE_300_GBPS) {
1365                 return -EINVAL;
1366         } else {
1367                 while (rate != IB_RATE_2_5_GBPS &&
1368                        !(1 << (rate + MLX5_STAT_RATE_OFFSET) &
1369                          gen->stat_rate_support))
1370                         --rate;
1371         }
1372
1373         return rate + MLX5_STAT_RATE_OFFSET;
1374 }
1375
1376 static int mlx5_set_path(struct mlx5_ib_dev *dev, const struct ib_ah_attr *ah,
1377                          struct mlx5_qp_path *path, u8 port, int attr_mask,
1378                          u32 path_flags, const struct ib_qp_attr *attr)
1379 {
1380         struct mlx5_general_caps *gen;
1381         int err;
1382
1383         gen = &dev->mdev->caps.gen;
1384         path->fl = (path_flags & MLX5_PATH_FLAG_FL) ? 0x80 : 0;
1385         path->free_ar = (path_flags & MLX5_PATH_FLAG_FREE_AR) ? 0x80 : 0;
1386
1387         if (attr_mask & IB_QP_PKEY_INDEX)
1388                 path->pkey_index = attr->pkey_index;
1389
1390         path->grh_mlid  = ah->src_path_bits & 0x7f;
1391         path->rlid      = cpu_to_be16(ah->dlid);
1392
1393         if (ah->ah_flags & IB_AH_GRH) {
1394                 if (ah->grh.sgid_index >= gen->port[port - 1].gid_table_len) {
1395                         pr_err("sgid_index (%u) too large. max is %d\n",
1396                                ah->grh.sgid_index, gen->port[port - 1].gid_table_len);
1397                         return -EINVAL;
1398                 }
1399                 path->grh_mlid |= 1 << 7;
1400                 path->mgid_index = ah->grh.sgid_index;
1401                 path->hop_limit  = ah->grh.hop_limit;
1402                 path->tclass_flowlabel =
1403                         cpu_to_be32((ah->grh.traffic_class << 20) |
1404                                     (ah->grh.flow_label));
1405                 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1406         }
1407
1408         err = ib_rate_to_mlx5(dev, ah->static_rate);
1409         if (err < 0)
1410                 return err;
1411         path->static_rate = err;
1412         path->port = port;
1413
1414         if (attr_mask & IB_QP_TIMEOUT)
1415                 path->ackto_lt = attr->timeout << 3;
1416
1417         path->sl = ah->sl & 0xf;
1418
1419         return 0;
1420 }
1421
1422 static enum mlx5_qp_optpar opt_mask[MLX5_QP_NUM_STATE][MLX5_QP_NUM_STATE][MLX5_QP_ST_MAX] = {
1423         [MLX5_QP_STATE_INIT] = {
1424                 [MLX5_QP_STATE_INIT] = {
1425                         [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_RRE            |
1426                                           MLX5_QP_OPTPAR_RAE            |
1427                                           MLX5_QP_OPTPAR_RWE            |
1428                                           MLX5_QP_OPTPAR_PKEY_INDEX     |
1429                                           MLX5_QP_OPTPAR_PRI_PORT,
1430                         [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE            |
1431                                           MLX5_QP_OPTPAR_PKEY_INDEX     |
1432                                           MLX5_QP_OPTPAR_PRI_PORT,
1433                         [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_PKEY_INDEX     |
1434                                           MLX5_QP_OPTPAR_Q_KEY          |
1435                                           MLX5_QP_OPTPAR_PRI_PORT,
1436                 },
1437                 [MLX5_QP_STATE_RTR] = {
1438                         [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH  |
1439                                           MLX5_QP_OPTPAR_RRE            |
1440                                           MLX5_QP_OPTPAR_RAE            |
1441                                           MLX5_QP_OPTPAR_RWE            |
1442                                           MLX5_QP_OPTPAR_PKEY_INDEX,
1443                         [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH  |
1444                                           MLX5_QP_OPTPAR_RWE            |
1445                                           MLX5_QP_OPTPAR_PKEY_INDEX,
1446                         [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_PKEY_INDEX     |
1447                                           MLX5_QP_OPTPAR_Q_KEY,
1448                         [MLX5_QP_ST_MLX] = MLX5_QP_OPTPAR_PKEY_INDEX    |
1449                                            MLX5_QP_OPTPAR_Q_KEY,
1450                         [MLX5_QP_ST_XRC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH |
1451                                           MLX5_QP_OPTPAR_RRE            |
1452                                           MLX5_QP_OPTPAR_RAE            |
1453                                           MLX5_QP_OPTPAR_RWE            |
1454                                           MLX5_QP_OPTPAR_PKEY_INDEX,
1455                 },
1456         },
1457         [MLX5_QP_STATE_RTR] = {
1458                 [MLX5_QP_STATE_RTS] = {
1459                         [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH  |
1460                                           MLX5_QP_OPTPAR_RRE            |
1461                                           MLX5_QP_OPTPAR_RAE            |
1462                                           MLX5_QP_OPTPAR_RWE            |
1463                                           MLX5_QP_OPTPAR_PM_STATE       |
1464                                           MLX5_QP_OPTPAR_RNR_TIMEOUT,
1465                         [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH  |
1466                                           MLX5_QP_OPTPAR_RWE            |
1467                                           MLX5_QP_OPTPAR_PM_STATE,
1468                         [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY,
1469                 },
1470         },
1471         [MLX5_QP_STATE_RTS] = {
1472                 [MLX5_QP_STATE_RTS] = {
1473                         [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_RRE            |
1474                                           MLX5_QP_OPTPAR_RAE            |
1475                                           MLX5_QP_OPTPAR_RWE            |
1476                                           MLX5_QP_OPTPAR_RNR_TIMEOUT    |
1477                                           MLX5_QP_OPTPAR_PM_STATE       |
1478                                           MLX5_QP_OPTPAR_ALT_ADDR_PATH,
1479                         [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE            |
1480                                           MLX5_QP_OPTPAR_PM_STATE       |
1481                                           MLX5_QP_OPTPAR_ALT_ADDR_PATH,
1482                         [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY          |
1483                                           MLX5_QP_OPTPAR_SRQN           |
1484                                           MLX5_QP_OPTPAR_CQN_RCV,
1485                 },
1486         },
1487         [MLX5_QP_STATE_SQER] = {
1488                 [MLX5_QP_STATE_RTS] = {
1489                         [MLX5_QP_ST_UD]  = MLX5_QP_OPTPAR_Q_KEY,
1490                         [MLX5_QP_ST_MLX] = MLX5_QP_OPTPAR_Q_KEY,
1491                         [MLX5_QP_ST_UC]  = MLX5_QP_OPTPAR_RWE,
1492                         [MLX5_QP_ST_RC]  = MLX5_QP_OPTPAR_RNR_TIMEOUT   |
1493                                            MLX5_QP_OPTPAR_RWE           |
1494                                            MLX5_QP_OPTPAR_RAE           |
1495                                            MLX5_QP_OPTPAR_RRE,
1496                 },
1497         },
1498 };
1499
1500 static int ib_nr_to_mlx5_nr(int ib_mask)
1501 {
1502         switch (ib_mask) {
1503         case IB_QP_STATE:
1504                 return 0;
1505         case IB_QP_CUR_STATE:
1506                 return 0;
1507         case IB_QP_EN_SQD_ASYNC_NOTIFY:
1508                 return 0;
1509         case IB_QP_ACCESS_FLAGS:
1510                 return MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_RRE |
1511                         MLX5_QP_OPTPAR_RAE;
1512         case IB_QP_PKEY_INDEX:
1513                 return MLX5_QP_OPTPAR_PKEY_INDEX;
1514         case IB_QP_PORT:
1515                 return MLX5_QP_OPTPAR_PRI_PORT;
1516         case IB_QP_QKEY:
1517                 return MLX5_QP_OPTPAR_Q_KEY;
1518         case IB_QP_AV:
1519                 return MLX5_QP_OPTPAR_PRIMARY_ADDR_PATH |
1520                         MLX5_QP_OPTPAR_PRI_PORT;
1521         case IB_QP_PATH_MTU:
1522                 return 0;
1523         case IB_QP_TIMEOUT:
1524                 return MLX5_QP_OPTPAR_ACK_TIMEOUT;
1525         case IB_QP_RETRY_CNT:
1526                 return MLX5_QP_OPTPAR_RETRY_COUNT;
1527         case IB_QP_RNR_RETRY:
1528                 return MLX5_QP_OPTPAR_RNR_RETRY;
1529         case IB_QP_RQ_PSN:
1530                 return 0;
1531         case IB_QP_MAX_QP_RD_ATOMIC:
1532                 return MLX5_QP_OPTPAR_SRA_MAX;
1533         case IB_QP_ALT_PATH:
1534                 return MLX5_QP_OPTPAR_ALT_ADDR_PATH;
1535         case IB_QP_MIN_RNR_TIMER:
1536                 return MLX5_QP_OPTPAR_RNR_TIMEOUT;
1537         case IB_QP_SQ_PSN:
1538                 return 0;
1539         case IB_QP_MAX_DEST_RD_ATOMIC:
1540                 return MLX5_QP_OPTPAR_RRA_MAX | MLX5_QP_OPTPAR_RWE |
1541                         MLX5_QP_OPTPAR_RRE | MLX5_QP_OPTPAR_RAE;
1542         case IB_QP_PATH_MIG_STATE:
1543                 return MLX5_QP_OPTPAR_PM_STATE;
1544         case IB_QP_CAP:
1545                 return 0;
1546         case IB_QP_DEST_QPN:
1547                 return 0;
1548         }
1549         return 0;
1550 }
1551
1552 static int ib_mask_to_mlx5_opt(int ib_mask)
1553 {
1554         int result = 0;
1555         int i;
1556
1557         for (i = 0; i < 8 * sizeof(int); i++) {
1558                 if ((1 << i) & ib_mask)
1559                         result |= ib_nr_to_mlx5_nr(1 << i);
1560         }
1561
1562         return result;
1563 }
1564
1565 static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
1566                                const struct ib_qp_attr *attr, int attr_mask,
1567                                enum ib_qp_state cur_state, enum ib_qp_state new_state)
1568 {
1569         struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
1570         struct mlx5_ib_qp *qp = to_mqp(ibqp);
1571         struct mlx5_ib_cq *send_cq, *recv_cq;
1572         struct mlx5_qp_context *context;
1573         struct mlx5_general_caps *gen;
1574         struct mlx5_modify_qp_mbox_in *in;
1575         struct mlx5_ib_pd *pd;
1576         enum mlx5_qp_state mlx5_cur, mlx5_new;
1577         enum mlx5_qp_optpar optpar;
1578         int sqd_event;
1579         int mlx5_st;
1580         int err;
1581
1582         gen = &dev->mdev->caps.gen;
1583         in = kzalloc(sizeof(*in), GFP_KERNEL);
1584         if (!in)
1585                 return -ENOMEM;
1586
1587         context = &in->ctx;
1588         err = to_mlx5_st(ibqp->qp_type);
1589         if (err < 0)
1590                 goto out;
1591
1592         context->flags = cpu_to_be32(err << 16);
1593
1594         if (!(attr_mask & IB_QP_PATH_MIG_STATE)) {
1595                 context->flags |= cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
1596         } else {
1597                 switch (attr->path_mig_state) {
1598                 case IB_MIG_MIGRATED:
1599                         context->flags |= cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
1600                         break;
1601                 case IB_MIG_REARM:
1602                         context->flags |= cpu_to_be32(MLX5_QP_PM_REARM << 11);
1603                         break;
1604                 case IB_MIG_ARMED:
1605                         context->flags |= cpu_to_be32(MLX5_QP_PM_ARMED << 11);
1606                         break;
1607                 }
1608         }
1609
1610         if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) {
1611                 context->mtu_msgmax = (IB_MTU_256 << 5) | 8;
1612         } else if (ibqp->qp_type == IB_QPT_UD ||
1613                    ibqp->qp_type == MLX5_IB_QPT_REG_UMR) {
1614                 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
1615         } else if (attr_mask & IB_QP_PATH_MTU) {
1616                 if (attr->path_mtu < IB_MTU_256 ||
1617                     attr->path_mtu > IB_MTU_4096) {
1618                         mlx5_ib_warn(dev, "invalid mtu %d\n", attr->path_mtu);
1619                         err = -EINVAL;
1620                         goto out;
1621                 }
1622                 context->mtu_msgmax = (attr->path_mtu << 5) | gen->log_max_msg;
1623         }
1624
1625         if (attr_mask & IB_QP_DEST_QPN)
1626                 context->log_pg_sz_remote_qpn = cpu_to_be32(attr->dest_qp_num);
1627
1628         if (attr_mask & IB_QP_PKEY_INDEX)
1629                 context->pri_path.pkey_index = attr->pkey_index;
1630
1631         /* todo implement counter_index functionality */
1632
1633         if (is_sqp(ibqp->qp_type))
1634                 context->pri_path.port = qp->port;
1635
1636         if (attr_mask & IB_QP_PORT)
1637                 context->pri_path.port = attr->port_num;
1638
1639         if (attr_mask & IB_QP_AV) {
1640                 err = mlx5_set_path(dev, &attr->ah_attr, &context->pri_path,
1641                                     attr_mask & IB_QP_PORT ? attr->port_num : qp->port,
1642                                     attr_mask, 0, attr);
1643                 if (err)
1644                         goto out;
1645         }
1646
1647         if (attr_mask & IB_QP_TIMEOUT)
1648                 context->pri_path.ackto_lt |= attr->timeout << 3;
1649
1650         if (attr_mask & IB_QP_ALT_PATH) {
1651                 err = mlx5_set_path(dev, &attr->alt_ah_attr, &context->alt_path,
1652                                     attr->alt_port_num, attr_mask, 0, attr);
1653                 if (err)
1654                         goto out;
1655         }
1656
1657         pd = get_pd(qp);
1658         get_cqs(qp, &send_cq, &recv_cq);
1659
1660         context->flags_pd = cpu_to_be32(pd ? pd->pdn : to_mpd(dev->devr.p0)->pdn);
1661         context->cqn_send = send_cq ? cpu_to_be32(send_cq->mcq.cqn) : 0;
1662         context->cqn_recv = recv_cq ? cpu_to_be32(recv_cq->mcq.cqn) : 0;
1663         context->params1  = cpu_to_be32(MLX5_IB_ACK_REQ_FREQ << 28);
1664
1665         if (attr_mask & IB_QP_RNR_RETRY)
1666                 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1667
1668         if (attr_mask & IB_QP_RETRY_CNT)
1669                 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1670
1671         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1672                 if (attr->max_rd_atomic)
1673                         context->params1 |=
1674                                 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1675         }
1676
1677         if (attr_mask & IB_QP_SQ_PSN)
1678                 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1679
1680         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1681                 if (attr->max_dest_rd_atomic)
1682                         context->params2 |=
1683                                 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1684         }
1685
1686         if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC))
1687                 context->params2 |= to_mlx5_access_flags(qp, attr, attr_mask);
1688
1689         if (attr_mask & IB_QP_MIN_RNR_TIMER)
1690                 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1691
1692         if (attr_mask & IB_QP_RQ_PSN)
1693                 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1694
1695         if (attr_mask & IB_QP_QKEY)
1696                 context->qkey = cpu_to_be32(attr->qkey);
1697
1698         if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1699                 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1700
1701         if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD  &&
1702             attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1703                 sqd_event = 1;
1704         else
1705                 sqd_event = 0;
1706
1707         if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1708                 context->sq_crq_size |= cpu_to_be16(1 << 4);
1709
1710
1711         mlx5_cur = to_mlx5_state(cur_state);
1712         mlx5_new = to_mlx5_state(new_state);
1713         mlx5_st = to_mlx5_st(ibqp->qp_type);
1714         if (mlx5_st < 0)
1715                 goto out;
1716
1717         /* If moving to a reset or error state, we must disable page faults on
1718          * this QP and flush all current page faults. Otherwise a stale page
1719          * fault may attempt to work on this QP after it is reset and moved
1720          * again to RTS, and may cause the driver and the device to get out of
1721          * sync. */
1722         if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
1723             (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
1724                 mlx5_ib_qp_disable_pagefaults(qp);
1725
1726         optpar = ib_mask_to_mlx5_opt(attr_mask);
1727         optpar &= opt_mask[mlx5_cur][mlx5_new][mlx5_st];
1728         in->optparam = cpu_to_be32(optpar);
1729         err = mlx5_core_qp_modify(dev->mdev, to_mlx5_state(cur_state),
1730                                   to_mlx5_state(new_state), in, sqd_event,
1731                                   &qp->mqp);
1732         if (err)
1733                 goto out;
1734
1735         if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1736                 mlx5_ib_qp_enable_pagefaults(qp);
1737
1738         qp->state = new_state;
1739
1740         if (attr_mask & IB_QP_ACCESS_FLAGS)
1741                 qp->atomic_rd_en = attr->qp_access_flags;
1742         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1743                 qp->resp_depth = attr->max_dest_rd_atomic;
1744         if (attr_mask & IB_QP_PORT)
1745                 qp->port = attr->port_num;
1746         if (attr_mask & IB_QP_ALT_PATH)
1747                 qp->alt_port = attr->alt_port_num;
1748
1749         /*
1750          * If we moved a kernel QP to RESET, clean up all old CQ
1751          * entries and reinitialize the QP.
1752          */
1753         if (new_state == IB_QPS_RESET && !ibqp->uobject) {
1754                 mlx5_ib_cq_clean(recv_cq, qp->mqp.qpn,
1755                                  ibqp->srq ? to_msrq(ibqp->srq) : NULL);
1756                 if (send_cq != recv_cq)
1757                         mlx5_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1758
1759                 qp->rq.head = 0;
1760                 qp->rq.tail = 0;
1761                 qp->sq.head = 0;
1762                 qp->sq.tail = 0;
1763                 qp->sq.cur_post = 0;
1764                 qp->sq.last_poll = 0;
1765                 qp->db.db[MLX5_RCV_DBR] = 0;
1766                 qp->db.db[MLX5_SND_DBR] = 0;
1767         }
1768
1769 out:
1770         kfree(in);
1771         return err;
1772 }
1773
1774 int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1775                       int attr_mask, struct ib_udata *udata)
1776 {
1777         struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
1778         struct mlx5_ib_qp *qp = to_mqp(ibqp);
1779         enum ib_qp_state cur_state, new_state;
1780         struct mlx5_general_caps *gen;
1781         int err = -EINVAL;
1782         int port;
1783
1784         gen = &dev->mdev->caps.gen;
1785         mutex_lock(&qp->mutex);
1786
1787         cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1788         new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1789
1790         if (ibqp->qp_type != MLX5_IB_QPT_REG_UMR &&
1791             !ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask,
1792                                 IB_LINK_LAYER_UNSPECIFIED))
1793                 goto out;
1794
1795         if ((attr_mask & IB_QP_PORT) &&
1796             (attr->port_num == 0 || attr->port_num > gen->num_ports))
1797                 goto out;
1798
1799         if (attr_mask & IB_QP_PKEY_INDEX) {
1800                 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1801                 if (attr->pkey_index >= gen->port[port - 1].pkey_table_len)
1802                         goto out;
1803         }
1804
1805         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1806             attr->max_rd_atomic > (1 << gen->log_max_ra_res_qp))
1807                 goto out;
1808
1809         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1810             attr->max_dest_rd_atomic > (1 << gen->log_max_ra_req_qp))
1811                 goto out;
1812
1813         if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1814                 err = 0;
1815                 goto out;
1816         }
1817
1818         err = __mlx5_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
1819
1820 out:
1821         mutex_unlock(&qp->mutex);
1822         return err;
1823 }
1824
1825 static int mlx5_wq_overflow(struct mlx5_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
1826 {
1827         struct mlx5_ib_cq *cq;
1828         unsigned cur;
1829
1830         cur = wq->head - wq->tail;
1831         if (likely(cur + nreq < wq->max_post))
1832                 return 0;
1833
1834         cq = to_mcq(ib_cq);
1835         spin_lock(&cq->lock);
1836         cur = wq->head - wq->tail;
1837         spin_unlock(&cq->lock);
1838
1839         return cur + nreq >= wq->max_post;
1840 }
1841
1842 static __always_inline void set_raddr_seg(struct mlx5_wqe_raddr_seg *rseg,
1843                                           u64 remote_addr, u32 rkey)
1844 {
1845         rseg->raddr    = cpu_to_be64(remote_addr);
1846         rseg->rkey     = cpu_to_be32(rkey);
1847         rseg->reserved = 0;
1848 }
1849
1850 static void set_datagram_seg(struct mlx5_wqe_datagram_seg *dseg,
1851                              struct ib_send_wr *wr)
1852 {
1853         memcpy(&dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof(struct mlx5_av));
1854         dseg->av.dqp_dct = cpu_to_be32(wr->wr.ud.remote_qpn | MLX5_EXTENDED_UD_AV);
1855         dseg->av.key.qkey.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
1856 }
1857
1858 static void set_data_ptr_seg(struct mlx5_wqe_data_seg *dseg, struct ib_sge *sg)
1859 {
1860         dseg->byte_count = cpu_to_be32(sg->length);
1861         dseg->lkey       = cpu_to_be32(sg->lkey);
1862         dseg->addr       = cpu_to_be64(sg->addr);
1863 }
1864
1865 static __be16 get_klm_octo(int npages)
1866 {
1867         return cpu_to_be16(ALIGN(npages, 8) / 2);
1868 }
1869
1870 static __be64 frwr_mkey_mask(void)
1871 {
1872         u64 result;
1873
1874         result = MLX5_MKEY_MASK_LEN             |
1875                 MLX5_MKEY_MASK_PAGE_SIZE        |
1876                 MLX5_MKEY_MASK_START_ADDR       |
1877                 MLX5_MKEY_MASK_EN_RINVAL        |
1878                 MLX5_MKEY_MASK_KEY              |
1879                 MLX5_MKEY_MASK_LR               |
1880                 MLX5_MKEY_MASK_LW               |
1881                 MLX5_MKEY_MASK_RR               |
1882                 MLX5_MKEY_MASK_RW               |
1883                 MLX5_MKEY_MASK_A                |
1884                 MLX5_MKEY_MASK_SMALL_FENCE      |
1885                 MLX5_MKEY_MASK_FREE;
1886
1887         return cpu_to_be64(result);
1888 }
1889
1890 static __be64 sig_mkey_mask(void)
1891 {
1892         u64 result;
1893
1894         result = MLX5_MKEY_MASK_LEN             |
1895                 MLX5_MKEY_MASK_PAGE_SIZE        |
1896                 MLX5_MKEY_MASK_START_ADDR       |
1897                 MLX5_MKEY_MASK_EN_SIGERR        |
1898                 MLX5_MKEY_MASK_EN_RINVAL        |
1899                 MLX5_MKEY_MASK_KEY              |
1900                 MLX5_MKEY_MASK_LR               |
1901                 MLX5_MKEY_MASK_LW               |
1902                 MLX5_MKEY_MASK_RR               |
1903                 MLX5_MKEY_MASK_RW               |
1904                 MLX5_MKEY_MASK_SMALL_FENCE      |
1905                 MLX5_MKEY_MASK_FREE             |
1906                 MLX5_MKEY_MASK_BSF_EN;
1907
1908         return cpu_to_be64(result);
1909 }
1910
1911 static void set_frwr_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr,
1912                                  struct ib_send_wr *wr, int li)
1913 {
1914         memset(umr, 0, sizeof(*umr));
1915
1916         if (li) {
1917                 umr->mkey_mask = cpu_to_be64(MLX5_MKEY_MASK_FREE);
1918                 umr->flags = 1 << 7;
1919                 return;
1920         }
1921
1922         umr->flags = (1 << 5); /* fail if not free */
1923         umr->klm_octowords = get_klm_octo(wr->wr.fast_reg.page_list_len);
1924         umr->mkey_mask = frwr_mkey_mask();
1925 }
1926
1927 static __be64 get_umr_reg_mr_mask(void)
1928 {
1929         u64 result;
1930
1931         result = MLX5_MKEY_MASK_LEN             |
1932                  MLX5_MKEY_MASK_PAGE_SIZE       |
1933                  MLX5_MKEY_MASK_START_ADDR      |
1934                  MLX5_MKEY_MASK_PD              |
1935                  MLX5_MKEY_MASK_LR              |
1936                  MLX5_MKEY_MASK_LW              |
1937                  MLX5_MKEY_MASK_KEY             |
1938                  MLX5_MKEY_MASK_RR              |
1939                  MLX5_MKEY_MASK_RW              |
1940                  MLX5_MKEY_MASK_A               |
1941                  MLX5_MKEY_MASK_FREE;
1942
1943         return cpu_to_be64(result);
1944 }
1945
1946 static __be64 get_umr_unreg_mr_mask(void)
1947 {
1948         u64 result;
1949
1950         result = MLX5_MKEY_MASK_FREE;
1951
1952         return cpu_to_be64(result);
1953 }
1954
1955 static __be64 get_umr_update_mtt_mask(void)
1956 {
1957         u64 result;
1958
1959         result = MLX5_MKEY_MASK_FREE;
1960
1961         return cpu_to_be64(result);
1962 }
1963
1964 static void set_reg_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr,
1965                                 struct ib_send_wr *wr)
1966 {
1967         struct mlx5_umr_wr *umrwr = (struct mlx5_umr_wr *)&wr->wr.fast_reg;
1968
1969         memset(umr, 0, sizeof(*umr));
1970
1971         if (wr->send_flags & MLX5_IB_SEND_UMR_FAIL_IF_FREE)
1972                 umr->flags = MLX5_UMR_CHECK_FREE; /* fail if free */
1973         else
1974                 umr->flags = MLX5_UMR_CHECK_NOT_FREE; /* fail if not free */
1975
1976         if (!(wr->send_flags & MLX5_IB_SEND_UMR_UNREG)) {
1977                 umr->klm_octowords = get_klm_octo(umrwr->npages);
1978                 if (wr->send_flags & MLX5_IB_SEND_UMR_UPDATE_MTT) {
1979                         umr->mkey_mask = get_umr_update_mtt_mask();
1980                         umr->bsf_octowords = get_klm_octo(umrwr->target.offset);
1981                         umr->flags |= MLX5_UMR_TRANSLATION_OFFSET_EN;
1982                 } else {
1983                         umr->mkey_mask = get_umr_reg_mr_mask();
1984                 }
1985         } else {
1986                 umr->mkey_mask = get_umr_unreg_mr_mask();
1987         }
1988
1989         if (!wr->num_sge)
1990                 umr->flags |= MLX5_UMR_INLINE;
1991 }
1992
1993 static u8 get_umr_flags(int acc)
1994 {
1995         return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX5_PERM_ATOMIC       : 0) |
1996                (acc & IB_ACCESS_REMOTE_WRITE  ? MLX5_PERM_REMOTE_WRITE : 0) |
1997                (acc & IB_ACCESS_REMOTE_READ   ? MLX5_PERM_REMOTE_READ  : 0) |
1998                (acc & IB_ACCESS_LOCAL_WRITE   ? MLX5_PERM_LOCAL_WRITE  : 0) |
1999                 MLX5_PERM_LOCAL_READ | MLX5_PERM_UMR_EN;
2000 }
2001
2002 static void set_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr,
2003                              int li, int *writ)
2004 {
2005         memset(seg, 0, sizeof(*seg));
2006         if (li) {
2007                 seg->status = MLX5_MKEY_STATUS_FREE;
2008                 return;
2009         }
2010
2011         seg->flags = get_umr_flags(wr->wr.fast_reg.access_flags) |
2012                      MLX5_ACCESS_MODE_MTT;
2013         *writ = seg->flags & (MLX5_PERM_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE);
2014         seg->qpn_mkey7_0 = cpu_to_be32((wr->wr.fast_reg.rkey & 0xff) | 0xffffff00);
2015         seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL);
2016         seg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
2017         seg->len = cpu_to_be64(wr->wr.fast_reg.length);
2018         seg->xlt_oct_size = cpu_to_be32((wr->wr.fast_reg.page_list_len + 1) / 2);
2019         seg->log2_page_size = wr->wr.fast_reg.page_shift;
2020 }
2021
2022 static void set_reg_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr)
2023 {
2024         struct mlx5_umr_wr *umrwr = (struct mlx5_umr_wr *)&wr->wr.fast_reg;
2025
2026         memset(seg, 0, sizeof(*seg));
2027         if (wr->send_flags & MLX5_IB_SEND_UMR_UNREG) {
2028                 seg->status = MLX5_MKEY_STATUS_FREE;
2029                 return;
2030         }
2031
2032         seg->flags = convert_access(umrwr->access_flags);
2033         if (!(wr->send_flags & MLX5_IB_SEND_UMR_UPDATE_MTT)) {
2034                 seg->flags_pd = cpu_to_be32(to_mpd(umrwr->pd)->pdn);
2035                 seg->start_addr = cpu_to_be64(umrwr->target.virt_addr);
2036         }
2037         seg->len = cpu_to_be64(umrwr->length);
2038         seg->log2_page_size = umrwr->page_shift;
2039         seg->qpn_mkey7_0 = cpu_to_be32(0xffffff00 |
2040                                        mlx5_mkey_variant(umrwr->mkey));
2041 }
2042
2043 static void set_frwr_pages(struct mlx5_wqe_data_seg *dseg,
2044                            struct ib_send_wr *wr,
2045                            struct mlx5_core_dev *mdev,
2046                            struct mlx5_ib_pd *pd,
2047                            int writ)
2048 {
2049         struct mlx5_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
2050         u64 *page_list = wr->wr.fast_reg.page_list->page_list;
2051         u64 perm = MLX5_EN_RD | (writ ? MLX5_EN_WR : 0);
2052         int i;
2053
2054         for (i = 0; i < wr->wr.fast_reg.page_list_len; i++)
2055                 mfrpl->mapped_page_list[i] = cpu_to_be64(page_list[i] | perm);
2056         dseg->addr = cpu_to_be64(mfrpl->map);
2057         dseg->byte_count = cpu_to_be32(ALIGN(sizeof(u64) * wr->wr.fast_reg.page_list_len, 64));
2058         dseg->lkey = cpu_to_be32(pd->pa_lkey);
2059 }
2060
2061 static __be32 send_ieth(struct ib_send_wr *wr)
2062 {
2063         switch (wr->opcode) {
2064         case IB_WR_SEND_WITH_IMM:
2065         case IB_WR_RDMA_WRITE_WITH_IMM:
2066                 return wr->ex.imm_data;
2067
2068         case IB_WR_SEND_WITH_INV:
2069                 return cpu_to_be32(wr->ex.invalidate_rkey);
2070
2071         default:
2072                 return 0;
2073         }
2074 }
2075
2076 static u8 calc_sig(void *wqe, int size)
2077 {
2078         u8 *p = wqe;
2079         u8 res = 0;
2080         int i;
2081
2082         for (i = 0; i < size; i++)
2083                 res ^= p[i];
2084
2085         return ~res;
2086 }
2087
2088 static u8 wq_sig(void *wqe)
2089 {
2090         return calc_sig(wqe, (*((u8 *)wqe + 8) & 0x3f) << 4);
2091 }
2092
2093 static int set_data_inl_seg(struct mlx5_ib_qp *qp, struct ib_send_wr *wr,
2094                             void *wqe, int *sz)
2095 {
2096         struct mlx5_wqe_inline_seg *seg;
2097         void *qend = qp->sq.qend;
2098         void *addr;
2099         int inl = 0;
2100         int copy;
2101         int len;
2102         int i;
2103
2104         seg = wqe;
2105         wqe += sizeof(*seg);
2106         for (i = 0; i < wr->num_sge; i++) {
2107                 addr = (void *)(unsigned long)(wr->sg_list[i].addr);
2108                 len  = wr->sg_list[i].length;
2109                 inl += len;
2110
2111                 if (unlikely(inl > qp->max_inline_data))
2112                         return -ENOMEM;
2113
2114                 if (unlikely(wqe + len > qend)) {
2115                         copy = qend - wqe;
2116                         memcpy(wqe, addr, copy);
2117                         addr += copy;
2118                         len -= copy;
2119                         wqe = mlx5_get_send_wqe(qp, 0);
2120                 }
2121                 memcpy(wqe, addr, len);
2122                 wqe += len;
2123         }
2124
2125         seg->byte_count = cpu_to_be32(inl | MLX5_INLINE_SEG);
2126
2127         *sz = ALIGN(inl + sizeof(seg->byte_count), 16) / 16;
2128
2129         return 0;
2130 }
2131
2132 static u16 prot_field_size(enum ib_signature_type type)
2133 {
2134         switch (type) {
2135         case IB_SIG_TYPE_T10_DIF:
2136                 return MLX5_DIF_SIZE;
2137         default:
2138                 return 0;
2139         }
2140 }
2141
2142 static u8 bs_selector(int block_size)
2143 {
2144         switch (block_size) {
2145         case 512:           return 0x1;
2146         case 520:           return 0x2;
2147         case 4096:          return 0x3;
2148         case 4160:          return 0x4;
2149         case 1073741824:    return 0x5;
2150         default:            return 0;
2151         }
2152 }
2153
2154 static void mlx5_fill_inl_bsf(struct ib_sig_domain *domain,
2155                               struct mlx5_bsf_inl *inl)
2156 {
2157         /* Valid inline section and allow BSF refresh */
2158         inl->vld_refresh = cpu_to_be16(MLX5_BSF_INL_VALID |
2159                                        MLX5_BSF_REFRESH_DIF);
2160         inl->dif_apptag = cpu_to_be16(domain->sig.dif.app_tag);
2161         inl->dif_reftag = cpu_to_be32(domain->sig.dif.ref_tag);
2162         /* repeating block */
2163         inl->rp_inv_seed = MLX5_BSF_REPEAT_BLOCK;
2164         inl->sig_type = domain->sig.dif.bg_type == IB_T10DIF_CRC ?
2165                         MLX5_DIF_CRC : MLX5_DIF_IPCS;
2166
2167         if (domain->sig.dif.ref_remap)
2168                 inl->dif_inc_ref_guard_check |= MLX5_BSF_INC_REFTAG;
2169
2170         if (domain->sig.dif.app_escape) {
2171                 if (domain->sig.dif.ref_escape)
2172                         inl->dif_inc_ref_guard_check |= MLX5_BSF_APPREF_ESCAPE;
2173                 else
2174                         inl->dif_inc_ref_guard_check |= MLX5_BSF_APPTAG_ESCAPE;
2175         }
2176
2177         inl->dif_app_bitmask_check =
2178                 cpu_to_be16(domain->sig.dif.apptag_check_mask);
2179 }
2180
2181 static int mlx5_set_bsf(struct ib_mr *sig_mr,
2182                         struct ib_sig_attrs *sig_attrs,
2183                         struct mlx5_bsf *bsf, u32 data_size)
2184 {
2185         struct mlx5_core_sig_ctx *msig = to_mmr(sig_mr)->sig;
2186         struct mlx5_bsf_basic *basic = &bsf->basic;
2187         struct ib_sig_domain *mem = &sig_attrs->mem;
2188         struct ib_sig_domain *wire = &sig_attrs->wire;
2189
2190         memset(bsf, 0, sizeof(*bsf));
2191
2192         /* Basic + Extended + Inline */
2193         basic->bsf_size_sbs = 1 << 7;
2194         /* Input domain check byte mask */
2195         basic->check_byte_mask = sig_attrs->check_mask;
2196         basic->raw_data_size = cpu_to_be32(data_size);
2197
2198         /* Memory domain */
2199         switch (sig_attrs->mem.sig_type) {
2200         case IB_SIG_TYPE_NONE:
2201                 break;
2202         case IB_SIG_TYPE_T10_DIF:
2203                 basic->mem.bs_selector = bs_selector(mem->sig.dif.pi_interval);
2204                 basic->m_bfs_psv = cpu_to_be32(msig->psv_memory.psv_idx);
2205                 mlx5_fill_inl_bsf(mem, &bsf->m_inl);
2206                 break;
2207         default:
2208                 return -EINVAL;
2209         }
2210
2211         /* Wire domain */
2212         switch (sig_attrs->wire.sig_type) {
2213         case IB_SIG_TYPE_NONE:
2214                 break;
2215         case IB_SIG_TYPE_T10_DIF:
2216                 if (mem->sig.dif.pi_interval == wire->sig.dif.pi_interval &&
2217                     mem->sig_type == wire->sig_type) {
2218                         /* Same block structure */
2219                         basic->bsf_size_sbs |= 1 << 4;
2220                         if (mem->sig.dif.bg_type == wire->sig.dif.bg_type)
2221                                 basic->wire.copy_byte_mask |= MLX5_CPY_GRD_MASK;
2222                         if (mem->sig.dif.app_tag == wire->sig.dif.app_tag)
2223                                 basic->wire.copy_byte_mask |= MLX5_CPY_APP_MASK;
2224                         if (mem->sig.dif.ref_tag == wire->sig.dif.ref_tag)
2225                                 basic->wire.copy_byte_mask |= MLX5_CPY_REF_MASK;
2226                 } else
2227                         basic->wire.bs_selector = bs_selector(wire->sig.dif.pi_interval);
2228
2229                 basic->w_bfs_psv = cpu_to_be32(msig->psv_wire.psv_idx);
2230                 mlx5_fill_inl_bsf(wire, &bsf->w_inl);
2231                 break;
2232         default:
2233                 return -EINVAL;
2234         }
2235
2236         return 0;
2237 }
2238
2239 static int set_sig_data_segment(struct ib_send_wr *wr, struct mlx5_ib_qp *qp,
2240                                 void **seg, int *size)
2241 {
2242         struct ib_sig_attrs *sig_attrs = wr->wr.sig_handover.sig_attrs;
2243         struct ib_mr *sig_mr = wr->wr.sig_handover.sig_mr;
2244         struct mlx5_bsf *bsf;
2245         u32 data_len = wr->sg_list->length;
2246         u32 data_key = wr->sg_list->lkey;
2247         u64 data_va = wr->sg_list->addr;
2248         int ret;
2249         int wqe_size;
2250
2251         if (!wr->wr.sig_handover.prot ||
2252             (data_key == wr->wr.sig_handover.prot->lkey &&
2253              data_va == wr->wr.sig_handover.prot->addr &&
2254              data_len == wr->wr.sig_handover.prot->length)) {
2255                 /**
2256                  * Source domain doesn't contain signature information
2257                  * or data and protection are interleaved in memory.
2258                  * So need construct:
2259                  *                  ------------------
2260                  *                 |     data_klm     |
2261                  *                  ------------------
2262                  *                 |       BSF        |
2263                  *                  ------------------
2264                  **/
2265                 struct mlx5_klm *data_klm = *seg;
2266
2267                 data_klm->bcount = cpu_to_be32(data_len);
2268                 data_klm->key = cpu_to_be32(data_key);
2269                 data_klm->va = cpu_to_be64(data_va);
2270                 wqe_size = ALIGN(sizeof(*data_klm), 64);
2271         } else {
2272                 /**
2273                  * Source domain contains signature information
2274                  * So need construct a strided block format:
2275                  *               ---------------------------
2276                  *              |     stride_block_ctrl     |
2277                  *               ---------------------------
2278                  *              |          data_klm         |
2279                  *               ---------------------------
2280                  *              |          prot_klm         |
2281                  *               ---------------------------
2282                  *              |             BSF           |
2283                  *               ---------------------------
2284                  **/
2285                 struct mlx5_stride_block_ctrl_seg *sblock_ctrl;
2286                 struct mlx5_stride_block_entry *data_sentry;
2287                 struct mlx5_stride_block_entry *prot_sentry;
2288                 u32 prot_key = wr->wr.sig_handover.prot->lkey;
2289                 u64 prot_va = wr->wr.sig_handover.prot->addr;
2290                 u16 block_size = sig_attrs->mem.sig.dif.pi_interval;
2291                 int prot_size;
2292
2293                 sblock_ctrl = *seg;
2294                 data_sentry = (void *)sblock_ctrl + sizeof(*sblock_ctrl);
2295                 prot_sentry = (void *)data_sentry + sizeof(*data_sentry);
2296
2297                 prot_size = prot_field_size(sig_attrs->mem.sig_type);
2298                 if (!prot_size) {
2299                         pr_err("Bad block size given: %u\n", block_size);
2300                         return -EINVAL;
2301                 }
2302                 sblock_ctrl->bcount_per_cycle = cpu_to_be32(block_size +
2303                                                             prot_size);
2304                 sblock_ctrl->op = cpu_to_be32(MLX5_STRIDE_BLOCK_OP);
2305                 sblock_ctrl->repeat_count = cpu_to_be32(data_len / block_size);
2306                 sblock_ctrl->num_entries = cpu_to_be16(2);
2307
2308                 data_sentry->bcount = cpu_to_be16(block_size);
2309                 data_sentry->key = cpu_to_be32(data_key);
2310                 data_sentry->va = cpu_to_be64(data_va);
2311                 data_sentry->stride = cpu_to_be16(block_size);
2312
2313                 prot_sentry->bcount = cpu_to_be16(prot_size);
2314                 prot_sentry->key = cpu_to_be32(prot_key);
2315                 prot_sentry->va = cpu_to_be64(prot_va);
2316                 prot_sentry->stride = cpu_to_be16(prot_size);
2317
2318                 wqe_size = ALIGN(sizeof(*sblock_ctrl) + sizeof(*data_sentry) +
2319                                  sizeof(*prot_sentry), 64);
2320         }
2321
2322         *seg += wqe_size;
2323         *size += wqe_size / 16;
2324         if (unlikely((*seg == qp->sq.qend)))
2325                 *seg = mlx5_get_send_wqe(qp, 0);
2326
2327         bsf = *seg;
2328         ret = mlx5_set_bsf(sig_mr, sig_attrs, bsf, data_len);
2329         if (ret)
2330                 return -EINVAL;
2331
2332         *seg += sizeof(*bsf);
2333         *size += sizeof(*bsf) / 16;
2334         if (unlikely((*seg == qp->sq.qend)))
2335                 *seg = mlx5_get_send_wqe(qp, 0);
2336
2337         return 0;
2338 }
2339
2340 static void set_sig_mkey_segment(struct mlx5_mkey_seg *seg,
2341                                  struct ib_send_wr *wr, u32 nelements,
2342                                  u32 length, u32 pdn)
2343 {
2344         struct ib_mr *sig_mr = wr->wr.sig_handover.sig_mr;
2345         u32 sig_key = sig_mr->rkey;
2346         u8 sigerr = to_mmr(sig_mr)->sig->sigerr_count & 1;
2347
2348         memset(seg, 0, sizeof(*seg));
2349
2350         seg->flags = get_umr_flags(wr->wr.sig_handover.access_flags) |
2351                                    MLX5_ACCESS_MODE_KLM;
2352         seg->qpn_mkey7_0 = cpu_to_be32((sig_key & 0xff) | 0xffffff00);
2353         seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL | sigerr << 26 |
2354                                     MLX5_MKEY_BSF_EN | pdn);
2355         seg->len = cpu_to_be64(length);
2356         seg->xlt_oct_size = cpu_to_be32(be16_to_cpu(get_klm_octo(nelements)));
2357         seg->bsfs_octo_size = cpu_to_be32(MLX5_MKEY_BSF_OCTO_SIZE);
2358 }
2359
2360 static void set_sig_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr,
2361                                 struct ib_send_wr *wr, u32 nelements)
2362 {
2363         memset(umr, 0, sizeof(*umr));
2364
2365         umr->flags = MLX5_FLAGS_INLINE | MLX5_FLAGS_CHECK_FREE;
2366         umr->klm_octowords = get_klm_octo(nelements);
2367         umr->bsf_octowords = cpu_to_be16(MLX5_MKEY_BSF_OCTO_SIZE);
2368         umr->mkey_mask = sig_mkey_mask();
2369 }
2370
2371
2372 static int set_sig_umr_wr(struct ib_send_wr *wr, struct mlx5_ib_qp *qp,
2373                           void **seg, int *size)
2374 {
2375         struct mlx5_ib_mr *sig_mr = to_mmr(wr->wr.sig_handover.sig_mr);
2376         u32 pdn = get_pd(qp)->pdn;
2377         u32 klm_oct_size;
2378         int region_len, ret;
2379
2380         if (unlikely(wr->num_sge != 1) ||
2381             unlikely(wr->wr.sig_handover.access_flags &
2382                      IB_ACCESS_REMOTE_ATOMIC) ||
2383             unlikely(!sig_mr->sig) || unlikely(!qp->signature_en) ||
2384             unlikely(!sig_mr->sig->sig_status_checked))
2385                 return -EINVAL;
2386
2387         /* length of the protected region, data + protection */
2388         region_len = wr->sg_list->length;
2389         if (wr->wr.sig_handover.prot &&
2390             (wr->wr.sig_handover.prot->lkey != wr->sg_list->lkey  ||
2391              wr->wr.sig_handover.prot->addr != wr->sg_list->addr  ||
2392              wr->wr.sig_handover.prot->length != wr->sg_list->length))
2393                 region_len += wr->wr.sig_handover.prot->length;
2394
2395         /**
2396          * KLM octoword size - if protection was provided
2397          * then we use strided block format (3 octowords),
2398          * else we use single KLM (1 octoword)
2399          **/
2400         klm_oct_size = wr->wr.sig_handover.prot ? 3 : 1;
2401
2402         set_sig_umr_segment(*seg, wr, klm_oct_size);
2403         *seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
2404         *size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
2405         if (unlikely((*seg == qp->sq.qend)))
2406                 *seg = mlx5_get_send_wqe(qp, 0);
2407
2408         set_sig_mkey_segment(*seg, wr, klm_oct_size, region_len, pdn);
2409         *seg += sizeof(struct mlx5_mkey_seg);
2410         *size += sizeof(struct mlx5_mkey_seg) / 16;
2411         if (unlikely((*seg == qp->sq.qend)))
2412                 *seg = mlx5_get_send_wqe(qp, 0);
2413
2414         ret = set_sig_data_segment(wr, qp, seg, size);
2415         if (ret)
2416                 return ret;
2417
2418         sig_mr->sig->sig_status_checked = false;
2419         return 0;
2420 }
2421
2422 static int set_psv_wr(struct ib_sig_domain *domain,
2423                       u32 psv_idx, void **seg, int *size)
2424 {
2425         struct mlx5_seg_set_psv *psv_seg = *seg;
2426
2427         memset(psv_seg, 0, sizeof(*psv_seg));
2428         psv_seg->psv_num = cpu_to_be32(psv_idx);
2429         switch (domain->sig_type) {
2430         case IB_SIG_TYPE_NONE:
2431                 break;
2432         case IB_SIG_TYPE_T10_DIF:
2433                 psv_seg->transient_sig = cpu_to_be32(domain->sig.dif.bg << 16 |
2434                                                      domain->sig.dif.app_tag);
2435                 psv_seg->ref_tag = cpu_to_be32(domain->sig.dif.ref_tag);
2436                 break;
2437         default:
2438                 pr_err("Bad signature type given.\n");
2439                 return 1;
2440         }
2441
2442         *seg += sizeof(*psv_seg);
2443         *size += sizeof(*psv_seg) / 16;
2444
2445         return 0;
2446 }
2447
2448 static int set_frwr_li_wr(void **seg, struct ib_send_wr *wr, int *size,
2449                           struct mlx5_core_dev *mdev, struct mlx5_ib_pd *pd, struct mlx5_ib_qp *qp)
2450 {
2451         int writ = 0;
2452         int li;
2453
2454         li = wr->opcode == IB_WR_LOCAL_INV ? 1 : 0;
2455         if (unlikely(wr->send_flags & IB_SEND_INLINE))
2456                 return -EINVAL;
2457
2458         set_frwr_umr_segment(*seg, wr, li);
2459         *seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
2460         *size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
2461         if (unlikely((*seg == qp->sq.qend)))
2462                 *seg = mlx5_get_send_wqe(qp, 0);
2463         set_mkey_segment(*seg, wr, li, &writ);
2464         *seg += sizeof(struct mlx5_mkey_seg);
2465         *size += sizeof(struct mlx5_mkey_seg) / 16;
2466         if (unlikely((*seg == qp->sq.qend)))
2467                 *seg = mlx5_get_send_wqe(qp, 0);
2468         if (!li) {
2469                 if (unlikely(wr->wr.fast_reg.page_list_len >
2470                              wr->wr.fast_reg.page_list->max_page_list_len))
2471                         return  -ENOMEM;
2472
2473                 set_frwr_pages(*seg, wr, mdev, pd, writ);
2474                 *seg += sizeof(struct mlx5_wqe_data_seg);
2475                 *size += (sizeof(struct mlx5_wqe_data_seg) / 16);
2476         }
2477         return 0;
2478 }
2479
2480 static void dump_wqe(struct mlx5_ib_qp *qp, int idx, int size_16)
2481 {
2482         __be32 *p = NULL;
2483         int tidx = idx;
2484         int i, j;
2485
2486         pr_debug("dump wqe at %p\n", mlx5_get_send_wqe(qp, tidx));
2487         for (i = 0, j = 0; i < size_16 * 4; i += 4, j += 4) {
2488                 if ((i & 0xf) == 0) {
2489                         void *buf = mlx5_get_send_wqe(qp, tidx);
2490                         tidx = (tidx + 1) & (qp->sq.wqe_cnt - 1);
2491                         p = buf;
2492                         j = 0;
2493                 }
2494                 pr_debug("%08x %08x %08x %08x\n", be32_to_cpu(p[j]),
2495                          be32_to_cpu(p[j + 1]), be32_to_cpu(p[j + 2]),
2496                          be32_to_cpu(p[j + 3]));
2497         }
2498 }
2499
2500 static void mlx5_bf_copy(u64 __iomem *dst, u64 *src,
2501                          unsigned bytecnt, struct mlx5_ib_qp *qp)
2502 {
2503         while (bytecnt > 0) {
2504                 __iowrite64_copy(dst++, src++, 8);
2505                 __iowrite64_copy(dst++, src++, 8);
2506                 __iowrite64_copy(dst++, src++, 8);
2507                 __iowrite64_copy(dst++, src++, 8);
2508                 __iowrite64_copy(dst++, src++, 8);
2509                 __iowrite64_copy(dst++, src++, 8);
2510                 __iowrite64_copy(dst++, src++, 8);
2511                 __iowrite64_copy(dst++, src++, 8);
2512                 bytecnt -= 64;
2513                 if (unlikely(src == qp->sq.qend))
2514                         src = mlx5_get_send_wqe(qp, 0);
2515         }
2516 }
2517
2518 static u8 get_fence(u8 fence, struct ib_send_wr *wr)
2519 {
2520         if (unlikely(wr->opcode == IB_WR_LOCAL_INV &&
2521                      wr->send_flags & IB_SEND_FENCE))
2522                 return MLX5_FENCE_MODE_STRONG_ORDERING;
2523
2524         if (unlikely(fence)) {
2525                 if (wr->send_flags & IB_SEND_FENCE)
2526                         return MLX5_FENCE_MODE_SMALL_AND_FENCE;
2527                 else
2528                         return fence;
2529
2530         } else {
2531                 return 0;
2532         }
2533 }
2534
2535 static int begin_wqe(struct mlx5_ib_qp *qp, void **seg,
2536                      struct mlx5_wqe_ctrl_seg **ctrl,
2537                      struct ib_send_wr *wr, unsigned *idx,
2538                      int *size, int nreq)
2539 {
2540         int err = 0;
2541
2542         if (unlikely(mlx5_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq))) {
2543                 err = -ENOMEM;
2544                 return err;
2545         }
2546
2547         *idx = qp->sq.cur_post & (qp->sq.wqe_cnt - 1);
2548         *seg = mlx5_get_send_wqe(qp, *idx);
2549         *ctrl = *seg;
2550         *(uint32_t *)(*seg + 8) = 0;
2551         (*ctrl)->imm = send_ieth(wr);
2552         (*ctrl)->fm_ce_se = qp->sq_signal_bits |
2553                 (wr->send_flags & IB_SEND_SIGNALED ?
2554                  MLX5_WQE_CTRL_CQ_UPDATE : 0) |
2555                 (wr->send_flags & IB_SEND_SOLICITED ?
2556                  MLX5_WQE_CTRL_SOLICITED : 0);
2557
2558         *seg += sizeof(**ctrl);
2559         *size = sizeof(**ctrl) / 16;
2560
2561         return err;
2562 }
2563
2564 static void finish_wqe(struct mlx5_ib_qp *qp,
2565                        struct mlx5_wqe_ctrl_seg *ctrl,
2566                        u8 size, unsigned idx, u64 wr_id,
2567                        int nreq, u8 fence, u8 next_fence,
2568                        u32 mlx5_opcode)
2569 {
2570         u8 opmod = 0;
2571
2572         ctrl->opmod_idx_opcode = cpu_to_be32(((u32)(qp->sq.cur_post) << 8) |
2573                                              mlx5_opcode | ((u32)opmod << 24));
2574         ctrl->qpn_ds = cpu_to_be32(size | (qp->mqp.qpn << 8));
2575         ctrl->fm_ce_se |= fence;
2576         qp->fm_cache = next_fence;
2577         if (unlikely(qp->wq_sig))
2578                 ctrl->signature = wq_sig(ctrl);
2579
2580         qp->sq.wrid[idx] = wr_id;
2581         qp->sq.w_list[idx].opcode = mlx5_opcode;
2582         qp->sq.wqe_head[idx] = qp->sq.head + nreq;
2583         qp->sq.cur_post += DIV_ROUND_UP(size * 16, MLX5_SEND_WQE_BB);
2584         qp->sq.w_list[idx].next = qp->sq.cur_post;
2585 }
2586
2587
2588 int mlx5_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2589                       struct ib_send_wr **bad_wr)
2590 {
2591         struct mlx5_wqe_ctrl_seg *ctrl = NULL;  /* compiler warning */
2592         struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
2593         struct mlx5_core_dev *mdev = dev->mdev;
2594         struct mlx5_ib_qp *qp = to_mqp(ibqp);
2595         struct mlx5_ib_mr *mr;
2596         struct mlx5_wqe_data_seg *dpseg;
2597         struct mlx5_wqe_xrc_seg *xrc;
2598         struct mlx5_bf *bf = qp->bf;
2599         int uninitialized_var(size);
2600         void *qend = qp->sq.qend;
2601         unsigned long flags;
2602         unsigned idx;
2603         int err = 0;
2604         int inl = 0;
2605         int num_sge;
2606         void *seg;
2607         int nreq;
2608         int i;
2609         u8 next_fence = 0;
2610         u8 fence;
2611
2612         spin_lock_irqsave(&qp->sq.lock, flags);
2613
2614         for (nreq = 0; wr; nreq++, wr = wr->next) {
2615                 if (unlikely(wr->opcode >= ARRAY_SIZE(mlx5_ib_opcode))) {
2616                         mlx5_ib_warn(dev, "\n");
2617                         err = -EINVAL;
2618                         *bad_wr = wr;
2619                         goto out;
2620                 }
2621
2622                 fence = qp->fm_cache;
2623                 num_sge = wr->num_sge;
2624                 if (unlikely(num_sge > qp->sq.max_gs)) {
2625                         mlx5_ib_warn(dev, "\n");
2626                         err = -ENOMEM;
2627                         *bad_wr = wr;
2628                         goto out;
2629                 }
2630
2631                 err = begin_wqe(qp, &seg, &ctrl, wr, &idx, &size, nreq);
2632                 if (err) {
2633                         mlx5_ib_warn(dev, "\n");
2634                         err = -ENOMEM;
2635                         *bad_wr = wr;
2636                         goto out;
2637                 }
2638
2639                 switch (ibqp->qp_type) {
2640                 case IB_QPT_XRC_INI:
2641                         xrc = seg;
2642                         xrc->xrc_srqn = htonl(wr->xrc_remote_srq_num);
2643                         seg += sizeof(*xrc);
2644                         size += sizeof(*xrc) / 16;
2645                         /* fall through */
2646                 case IB_QPT_RC:
2647                         switch (wr->opcode) {
2648                         case IB_WR_RDMA_READ:
2649                         case IB_WR_RDMA_WRITE:
2650                         case IB_WR_RDMA_WRITE_WITH_IMM:
2651                                 set_raddr_seg(seg, wr->wr.rdma.remote_addr,
2652                                               wr->wr.rdma.rkey);
2653                                 seg += sizeof(struct mlx5_wqe_raddr_seg);
2654                                 size += sizeof(struct mlx5_wqe_raddr_seg) / 16;
2655                                 break;
2656
2657                         case IB_WR_ATOMIC_CMP_AND_SWP:
2658                         case IB_WR_ATOMIC_FETCH_AND_ADD:
2659                         case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2660                                 mlx5_ib_warn(dev, "Atomic operations are not supported yet\n");
2661                                 err = -ENOSYS;
2662                                 *bad_wr = wr;
2663                                 goto out;
2664
2665                         case IB_WR_LOCAL_INV:
2666                                 next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL;
2667                                 qp->sq.wr_data[idx] = IB_WR_LOCAL_INV;
2668                                 ctrl->imm = cpu_to_be32(wr->ex.invalidate_rkey);
2669                                 err = set_frwr_li_wr(&seg, wr, &size, mdev, to_mpd(ibqp->pd), qp);
2670                                 if (err) {
2671                                         mlx5_ib_warn(dev, "\n");
2672                                         *bad_wr = wr;
2673                                         goto out;
2674                                 }
2675                                 num_sge = 0;
2676                                 break;
2677
2678                         case IB_WR_FAST_REG_MR:
2679                                 next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL;
2680                                 qp->sq.wr_data[idx] = IB_WR_FAST_REG_MR;
2681                                 ctrl->imm = cpu_to_be32(wr->wr.fast_reg.rkey);
2682                                 err = set_frwr_li_wr(&seg, wr, &size, mdev, to_mpd(ibqp->pd), qp);
2683                                 if (err) {
2684                                         mlx5_ib_warn(dev, "\n");
2685                                         *bad_wr = wr;
2686                                         goto out;
2687                                 }
2688                                 num_sge = 0;
2689                                 break;
2690
2691                         case IB_WR_REG_SIG_MR:
2692                                 qp->sq.wr_data[idx] = IB_WR_REG_SIG_MR;
2693                                 mr = to_mmr(wr->wr.sig_handover.sig_mr);
2694
2695                                 ctrl->imm = cpu_to_be32(mr->ibmr.rkey);
2696                                 err = set_sig_umr_wr(wr, qp, &seg, &size);
2697                                 if (err) {
2698                                         mlx5_ib_warn(dev, "\n");
2699                                         *bad_wr = wr;
2700                                         goto out;
2701                                 }
2702
2703                                 finish_wqe(qp, ctrl, size, idx, wr->wr_id,
2704                                            nreq, get_fence(fence, wr),
2705                                            next_fence, MLX5_OPCODE_UMR);
2706                                 /*
2707                                  * SET_PSV WQEs are not signaled and solicited
2708                                  * on error
2709                                  */
2710                                 wr->send_flags &= ~IB_SEND_SIGNALED;
2711                                 wr->send_flags |= IB_SEND_SOLICITED;
2712                                 err = begin_wqe(qp, &seg, &ctrl, wr,
2713                                                 &idx, &size, nreq);
2714                                 if (err) {
2715                                         mlx5_ib_warn(dev, "\n");
2716                                         err = -ENOMEM;
2717                                         *bad_wr = wr;
2718                                         goto out;
2719                                 }
2720
2721                                 err = set_psv_wr(&wr->wr.sig_handover.sig_attrs->mem,
2722                                                  mr->sig->psv_memory.psv_idx, &seg,
2723                                                  &size);
2724                                 if (err) {
2725                                         mlx5_ib_warn(dev, "\n");
2726                                         *bad_wr = wr;
2727                                         goto out;
2728                                 }
2729
2730                                 finish_wqe(qp, ctrl, size, idx, wr->wr_id,
2731                                            nreq, get_fence(fence, wr),
2732                                            next_fence, MLX5_OPCODE_SET_PSV);
2733                                 err = begin_wqe(qp, &seg, &ctrl, wr,
2734                                                 &idx, &size, nreq);
2735                                 if (err) {
2736                                         mlx5_ib_warn(dev, "\n");
2737                                         err = -ENOMEM;
2738                                         *bad_wr = wr;
2739                                         goto out;
2740                                 }
2741
2742                                 next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL;
2743                                 err = set_psv_wr(&wr->wr.sig_handover.sig_attrs->wire,
2744                                                  mr->sig->psv_wire.psv_idx, &seg,
2745                                                  &size);
2746                                 if (err) {
2747                                         mlx5_ib_warn(dev, "\n");
2748                                         *bad_wr = wr;
2749                                         goto out;
2750                                 }
2751
2752                                 finish_wqe(qp, ctrl, size, idx, wr->wr_id,
2753                                            nreq, get_fence(fence, wr),
2754                                            next_fence, MLX5_OPCODE_SET_PSV);
2755                                 num_sge = 0;
2756                                 goto skip_psv;
2757
2758                         default:
2759                                 break;
2760                         }
2761                         break;
2762
2763                 case IB_QPT_UC:
2764                         switch (wr->opcode) {
2765                         case IB_WR_RDMA_WRITE:
2766                         case IB_WR_RDMA_WRITE_WITH_IMM:
2767                                 set_raddr_seg(seg, wr->wr.rdma.remote_addr,
2768                                               wr->wr.rdma.rkey);
2769                                 seg  += sizeof(struct mlx5_wqe_raddr_seg);
2770                                 size += sizeof(struct mlx5_wqe_raddr_seg) / 16;
2771                                 break;
2772
2773                         default:
2774                                 break;
2775                         }
2776                         break;
2777
2778                 case IB_QPT_UD:
2779                 case IB_QPT_SMI:
2780                 case IB_QPT_GSI:
2781                         set_datagram_seg(seg, wr);
2782                         seg += sizeof(struct mlx5_wqe_datagram_seg);
2783                         size += sizeof(struct mlx5_wqe_datagram_seg) / 16;
2784                         if (unlikely((seg == qend)))
2785                                 seg = mlx5_get_send_wqe(qp, 0);
2786                         break;
2787
2788                 case MLX5_IB_QPT_REG_UMR:
2789                         if (wr->opcode != MLX5_IB_WR_UMR) {
2790                                 err = -EINVAL;
2791                                 mlx5_ib_warn(dev, "bad opcode\n");
2792                                 goto out;
2793                         }
2794                         qp->sq.wr_data[idx] = MLX5_IB_WR_UMR;
2795                         ctrl->imm = cpu_to_be32(wr->wr.fast_reg.rkey);
2796                         set_reg_umr_segment(seg, wr);
2797                         seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
2798                         size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
2799                         if (unlikely((seg == qend)))
2800                                 seg = mlx5_get_send_wqe(qp, 0);
2801                         set_reg_mkey_segment(seg, wr);
2802                         seg += sizeof(struct mlx5_mkey_seg);
2803                         size += sizeof(struct mlx5_mkey_seg) / 16;
2804                         if (unlikely((seg == qend)))
2805                                 seg = mlx5_get_send_wqe(qp, 0);
2806                         break;
2807
2808                 default:
2809                         break;
2810                 }
2811
2812                 if (wr->send_flags & IB_SEND_INLINE && num_sge) {
2813                         int uninitialized_var(sz);
2814
2815                         err = set_data_inl_seg(qp, wr, seg, &sz);
2816                         if (unlikely(err)) {
2817                                 mlx5_ib_warn(dev, "\n");
2818                                 *bad_wr = wr;
2819                                 goto out;
2820                         }
2821                         inl = 1;
2822                         size += sz;
2823                 } else {
2824                         dpseg = seg;
2825                         for (i = 0; i < num_sge; i++) {
2826                                 if (unlikely(dpseg == qend)) {
2827                                         seg = mlx5_get_send_wqe(qp, 0);
2828                                         dpseg = seg;
2829                                 }
2830                                 if (likely(wr->sg_list[i].length)) {
2831                                         set_data_ptr_seg(dpseg, wr->sg_list + i);
2832                                         size += sizeof(struct mlx5_wqe_data_seg) / 16;
2833                                         dpseg++;
2834                                 }
2835                         }
2836                 }
2837
2838                 finish_wqe(qp, ctrl, size, idx, wr->wr_id, nreq,
2839                            get_fence(fence, wr), next_fence,
2840                            mlx5_ib_opcode[wr->opcode]);
2841 skip_psv:
2842                 if (0)
2843                         dump_wqe(qp, idx, size);
2844         }
2845
2846 out:
2847         if (likely(nreq)) {
2848                 qp->sq.head += nreq;
2849
2850                 /* Make sure that descriptors are written before
2851                  * updating doorbell record and ringing the doorbell
2852                  */
2853                 wmb();
2854
2855                 qp->db.db[MLX5_SND_DBR] = cpu_to_be32(qp->sq.cur_post);
2856
2857                 /* Make sure doorbell record is visible to the HCA before
2858                  * we hit doorbell */
2859                 wmb();
2860
2861                 if (bf->need_lock)
2862                         spin_lock(&bf->lock);
2863                 else
2864                         __acquire(&bf->lock);
2865
2866                 /* TBD enable WC */
2867                 if (0 && nreq == 1 && bf->uuarn && inl && size > 1 && size <= bf->buf_size / 16) {
2868                         mlx5_bf_copy(bf->reg + bf->offset, (u64 *)ctrl, ALIGN(size * 16, 64), qp);
2869                         /* wc_wmb(); */
2870                 } else {
2871                         mlx5_write64((__be32 *)ctrl, bf->regreg + bf->offset,
2872                                      MLX5_GET_DOORBELL_LOCK(&bf->lock32));
2873                         /* Make sure doorbells don't leak out of SQ spinlock
2874                          * and reach the HCA out of order.
2875                          */
2876                         mmiowb();
2877                 }
2878                 bf->offset ^= bf->buf_size;
2879                 if (bf->need_lock)
2880                         spin_unlock(&bf->lock);
2881                 else
2882                         __release(&bf->lock);
2883         }
2884
2885         spin_unlock_irqrestore(&qp->sq.lock, flags);
2886
2887         return err;
2888 }
2889
2890 static void set_sig_seg(struct mlx5_rwqe_sig *sig, int size)
2891 {
2892         sig->signature = calc_sig(sig, size);
2893 }
2894
2895 int mlx5_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2896                       struct ib_recv_wr **bad_wr)
2897 {
2898         struct mlx5_ib_qp *qp = to_mqp(ibqp);
2899         struct mlx5_wqe_data_seg *scat;
2900         struct mlx5_rwqe_sig *sig;
2901         unsigned long flags;
2902         int err = 0;
2903         int nreq;
2904         int ind;
2905         int i;
2906
2907         spin_lock_irqsave(&qp->rq.lock, flags);
2908
2909         ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2910
2911         for (nreq = 0; wr; nreq++, wr = wr->next) {
2912                 if (mlx5_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2913                         err = -ENOMEM;
2914                         *bad_wr = wr;
2915                         goto out;
2916                 }
2917
2918                 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2919                         err = -EINVAL;
2920                         *bad_wr = wr;
2921                         goto out;
2922                 }
2923
2924                 scat = get_recv_wqe(qp, ind);
2925                 if (qp->wq_sig)
2926                         scat++;
2927
2928                 for (i = 0; i < wr->num_sge; i++)
2929                         set_data_ptr_seg(scat + i, wr->sg_list + i);
2930
2931                 if (i < qp->rq.max_gs) {
2932                         scat[i].byte_count = 0;
2933                         scat[i].lkey       = cpu_to_be32(MLX5_INVALID_LKEY);
2934                         scat[i].addr       = 0;
2935                 }
2936
2937                 if (qp->wq_sig) {
2938                         sig = (struct mlx5_rwqe_sig *)scat;
2939                         set_sig_seg(sig, (qp->rq.max_gs + 1) << 2);
2940                 }
2941
2942                 qp->rq.wrid[ind] = wr->wr_id;
2943
2944                 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
2945         }
2946
2947 out:
2948         if (likely(nreq)) {
2949                 qp->rq.head += nreq;
2950
2951                 /* Make sure that descriptors are written before
2952                  * doorbell record.
2953                  */
2954                 wmb();
2955
2956                 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
2957         }
2958
2959         spin_unlock_irqrestore(&qp->rq.lock, flags);
2960
2961         return err;
2962 }
2963
2964 static inline enum ib_qp_state to_ib_qp_state(enum mlx5_qp_state mlx5_state)
2965 {
2966         switch (mlx5_state) {
2967         case MLX5_QP_STATE_RST:      return IB_QPS_RESET;
2968         case MLX5_QP_STATE_INIT:     return IB_QPS_INIT;
2969         case MLX5_QP_STATE_RTR:      return IB_QPS_RTR;
2970         case MLX5_QP_STATE_RTS:      return IB_QPS_RTS;
2971         case MLX5_QP_STATE_SQ_DRAINING:
2972         case MLX5_QP_STATE_SQD:      return IB_QPS_SQD;
2973         case MLX5_QP_STATE_SQER:     return IB_QPS_SQE;
2974         case MLX5_QP_STATE_ERR:      return IB_QPS_ERR;
2975         default:                     return -1;
2976         }
2977 }
2978
2979 static inline enum ib_mig_state to_ib_mig_state(int mlx5_mig_state)
2980 {
2981         switch (mlx5_mig_state) {
2982         case MLX5_QP_PM_ARMED:          return IB_MIG_ARMED;
2983         case MLX5_QP_PM_REARM:          return IB_MIG_REARM;
2984         case MLX5_QP_PM_MIGRATED:       return IB_MIG_MIGRATED;
2985         default: return -1;
2986         }
2987 }
2988
2989 static int to_ib_qp_access_flags(int mlx5_flags)
2990 {
2991         int ib_flags = 0;
2992
2993         if (mlx5_flags & MLX5_QP_BIT_RRE)
2994                 ib_flags |= IB_ACCESS_REMOTE_READ;
2995         if (mlx5_flags & MLX5_QP_BIT_RWE)
2996                 ib_flags |= IB_ACCESS_REMOTE_WRITE;
2997         if (mlx5_flags & MLX5_QP_BIT_RAE)
2998                 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
2999
3000         return ib_flags;
3001 }
3002
3003 static void to_ib_ah_attr(struct mlx5_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
3004                                 struct mlx5_qp_path *path)
3005 {
3006         struct mlx5_core_dev *dev = ibdev->mdev;
3007
3008         memset(ib_ah_attr, 0, sizeof(*ib_ah_attr));
3009         ib_ah_attr->port_num      = path->port;
3010
3011         if (ib_ah_attr->port_num == 0 ||
3012             ib_ah_attr->port_num > dev->caps.gen.num_ports)
3013                 return;
3014
3015         ib_ah_attr->sl = path->sl & 0xf;
3016
3017         ib_ah_attr->dlid          = be16_to_cpu(path->rlid);
3018         ib_ah_attr->src_path_bits = path->grh_mlid & 0x7f;
3019         ib_ah_attr->static_rate   = path->static_rate ? path->static_rate - 5 : 0;
3020         ib_ah_attr->ah_flags      = (path->grh_mlid & (1 << 7)) ? IB_AH_GRH : 0;
3021         if (ib_ah_attr->ah_flags) {
3022                 ib_ah_attr->grh.sgid_index = path->mgid_index;
3023                 ib_ah_attr->grh.hop_limit  = path->hop_limit;
3024                 ib_ah_attr->grh.traffic_class =
3025                         (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
3026                 ib_ah_attr->grh.flow_label =
3027                         be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
3028                 memcpy(ib_ah_attr->grh.dgid.raw,
3029                        path->rgid, sizeof(ib_ah_attr->grh.dgid.raw));
3030         }
3031 }
3032
3033 int mlx5_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
3034                      struct ib_qp_init_attr *qp_init_attr)
3035 {
3036         struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
3037         struct mlx5_ib_qp *qp = to_mqp(ibqp);
3038         struct mlx5_query_qp_mbox_out *outb;
3039         struct mlx5_qp_context *context;
3040         int mlx5_state;
3041         int err = 0;
3042
3043 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3044         /*
3045          * Wait for any outstanding page faults, in case the user frees memory
3046          * based upon this query's result.
3047          */
3048         flush_workqueue(mlx5_ib_page_fault_wq);
3049 #endif
3050
3051         mutex_lock(&qp->mutex);
3052         outb = kzalloc(sizeof(*outb), GFP_KERNEL);
3053         if (!outb) {
3054                 err = -ENOMEM;
3055                 goto out;
3056         }
3057         context = &outb->ctx;
3058         err = mlx5_core_qp_query(dev->mdev, &qp->mqp, outb, sizeof(*outb));
3059         if (err)
3060                 goto out_free;
3061
3062         mlx5_state = be32_to_cpu(context->flags) >> 28;
3063
3064         qp->state                    = to_ib_qp_state(mlx5_state);
3065         qp_attr->qp_state            = qp->state;
3066         qp_attr->path_mtu            = context->mtu_msgmax >> 5;
3067         qp_attr->path_mig_state      =
3068                 to_ib_mig_state((be32_to_cpu(context->flags) >> 11) & 0x3);
3069         qp_attr->qkey                = be32_to_cpu(context->qkey);
3070         qp_attr->rq_psn              = be32_to_cpu(context->rnr_nextrecvpsn) & 0xffffff;
3071         qp_attr->sq_psn              = be32_to_cpu(context->next_send_psn) & 0xffffff;
3072         qp_attr->dest_qp_num         = be32_to_cpu(context->log_pg_sz_remote_qpn) & 0xffffff;
3073         qp_attr->qp_access_flags     =
3074                 to_ib_qp_access_flags(be32_to_cpu(context->params2));
3075
3076         if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
3077                 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context->pri_path);
3078                 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context->alt_path);
3079                 qp_attr->alt_pkey_index = context->alt_path.pkey_index & 0x7f;
3080                 qp_attr->alt_port_num   = qp_attr->alt_ah_attr.port_num;
3081         }
3082
3083         qp_attr->pkey_index = context->pri_path.pkey_index & 0x7f;
3084         qp_attr->port_num = context->pri_path.port;
3085
3086         /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
3087         qp_attr->sq_draining = mlx5_state == MLX5_QP_STATE_SQ_DRAINING;
3088
3089         qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context->params1) >> 21) & 0x7);
3090
3091         qp_attr->max_dest_rd_atomic =
3092                 1 << ((be32_to_cpu(context->params2) >> 21) & 0x7);
3093         qp_attr->min_rnr_timer      =
3094                 (be32_to_cpu(context->rnr_nextrecvpsn) >> 24) & 0x1f;
3095         qp_attr->timeout            = context->pri_path.ackto_lt >> 3;
3096         qp_attr->retry_cnt          = (be32_to_cpu(context->params1) >> 16) & 0x7;
3097         qp_attr->rnr_retry          = (be32_to_cpu(context->params1) >> 13) & 0x7;
3098         qp_attr->alt_timeout        = context->alt_path.ackto_lt >> 3;
3099         qp_attr->cur_qp_state        = qp_attr->qp_state;
3100         qp_attr->cap.max_recv_wr     = qp->rq.wqe_cnt;
3101         qp_attr->cap.max_recv_sge    = qp->rq.max_gs;
3102
3103         if (!ibqp->uobject) {
3104                 qp_attr->cap.max_send_wr  = qp->sq.wqe_cnt;
3105                 qp_attr->cap.max_send_sge = qp->sq.max_gs;
3106         } else {
3107                 qp_attr->cap.max_send_wr  = 0;
3108                 qp_attr->cap.max_send_sge = 0;
3109         }
3110
3111         /* We don't support inline sends for kernel QPs (yet), and we
3112          * don't know what userspace's value should be.
3113          */
3114         qp_attr->cap.max_inline_data = 0;
3115
3116         qp_init_attr->cap            = qp_attr->cap;
3117
3118         qp_init_attr->create_flags = 0;
3119         if (qp->flags & MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK)
3120                 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
3121
3122         qp_init_attr->sq_sig_type = qp->sq_signal_bits & MLX5_WQE_CTRL_CQ_UPDATE ?
3123                 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
3124
3125 out_free:
3126         kfree(outb);
3127
3128 out:
3129         mutex_unlock(&qp->mutex);
3130         return err;
3131 }
3132
3133 struct ib_xrcd *mlx5_ib_alloc_xrcd(struct ib_device *ibdev,
3134                                           struct ib_ucontext *context,
3135                                           struct ib_udata *udata)
3136 {
3137         struct mlx5_ib_dev *dev = to_mdev(ibdev);
3138         struct mlx5_general_caps *gen;
3139         struct mlx5_ib_xrcd *xrcd;
3140         int err;
3141
3142         gen = &dev->mdev->caps.gen;
3143         if (!(gen->flags & MLX5_DEV_CAP_FLAG_XRC))
3144                 return ERR_PTR(-ENOSYS);
3145
3146         xrcd = kmalloc(sizeof(*xrcd), GFP_KERNEL);
3147         if (!xrcd)
3148                 return ERR_PTR(-ENOMEM);
3149
3150         err = mlx5_core_xrcd_alloc(dev->mdev, &xrcd->xrcdn);
3151         if (err) {
3152                 kfree(xrcd);
3153                 return ERR_PTR(-ENOMEM);
3154         }
3155
3156         return &xrcd->ibxrcd;
3157 }
3158
3159 int mlx5_ib_dealloc_xrcd(struct ib_xrcd *xrcd)
3160 {
3161         struct mlx5_ib_dev *dev = to_mdev(xrcd->device);
3162         u32 xrcdn = to_mxrcd(xrcd)->xrcdn;
3163         int err;
3164
3165         err = mlx5_core_xrcd_dealloc(dev->mdev, xrcdn);
3166         if (err) {
3167                 mlx5_ib_warn(dev, "failed to dealloc xrcdn 0x%x\n", xrcdn);
3168                 return err;
3169         }
3170
3171         kfree(xrcd);
3172
3173         return 0;
3174 }