drivers/infiniband/hw/mthca/mthca_qp.c

   1 /*
   2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Cisco Systems. All rights reserved.
   4  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
   5  * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  *
  35  * $Id: mthca_qp.c 1355 2004-12-17 15:23:43Z roland $
  36  */
  37
  38 #include <linux/init.h>
  39
  40 #include <rdma/ib_verbs.h>
  41 #include <rdma/ib_cache.h>
  42 #include <rdma/ib_pack.h>
  43
  44 #include "mthca_dev.h"
  45 #include "mthca_cmd.h"
  46 #include "mthca_memfree.h"
  47 #include "mthca_wqe.h"
  48
  49 enum {
  50         MTHCA_MAX_DIRECT_QP_SIZE = 4 * PAGE_SIZE,
  51         MTHCA_ACK_REQ_FREQ       = 10,
  52         MTHCA_FLIGHT_LIMIT       = 9,
  53         MTHCA_UD_HEADER_SIZE     = 72, /* largest UD header possible */
  54         MTHCA_INLINE_HEADER_SIZE = 4,  /* data segment overhead for inline */
  55         MTHCA_INLINE_CHUNK_SIZE  = 16  /* inline data segment chunk */
  56 };
  57
  58 enum {
  59         MTHCA_QP_STATE_RST  = 0,
  60         MTHCA_QP_STATE_INIT = 1,
  61         MTHCA_QP_STATE_RTR  = 2,
  62         MTHCA_QP_STATE_RTS  = 3,
  63         MTHCA_QP_STATE_SQE  = 4,
  64         MTHCA_QP_STATE_SQD  = 5,
  65         MTHCA_QP_STATE_ERR  = 6,
  66         MTHCA_QP_STATE_DRAINING = 7
  67 };
  68
  69 enum {
  70         MTHCA_QP_ST_RC  = 0x0,
  71         MTHCA_QP_ST_UC  = 0x1,
  72         MTHCA_QP_ST_RD  = 0x2,
  73         MTHCA_QP_ST_UD  = 0x3,
  74         MTHCA_QP_ST_MLX = 0x7
  75 };
  76
  77 enum {
  78         MTHCA_QP_PM_MIGRATED = 0x3,
  79         MTHCA_QP_PM_ARMED    = 0x0,
  80         MTHCA_QP_PM_REARM    = 0x1
  81 };
  82
  83 enum {
  84         /* qp_context flags */
  85         MTHCA_QP_BIT_DE  = 1 <<  8,
  86         /* params1 */
  87         MTHCA_QP_BIT_SRE = 1 << 15,
  88         MTHCA_QP_BIT_SWE = 1 << 14,
  89         MTHCA_QP_BIT_SAE = 1 << 13,
  90         MTHCA_QP_BIT_SIC = 1 <<  4,
  91         MTHCA_QP_BIT_SSC = 1 <<  3,
  92         /* params2 */
  93         MTHCA_QP_BIT_RRE = 1 << 15,
  94         MTHCA_QP_BIT_RWE = 1 << 14,
  95         MTHCA_QP_BIT_RAE = 1 << 13,
  96         MTHCA_QP_BIT_RIC = 1 <<  4,
  97         MTHCA_QP_BIT_RSC = 1 <<  3
  98 };
  99
 100 struct mthca_qp_path {
 101         __be32 port_pkey;
 102         u8     rnr_retry;
 103         u8     g_mylmc;
 104         __be16 rlid;
 105         u8     ackto;
 106         u8     mgid_index;
 107         u8     static_rate;
 108         u8     hop_limit;
 109         __be32 sl_tclass_flowlabel;
 110         u8     rgid[16];
 111 } __attribute__((packed));
 112
 113 struct mthca_qp_context {
 114         __be32 flags;
 115         __be32 tavor_sched_queue; /* Reserved on Arbel */
 116         u8     mtu_msgmax;
 117         u8     rq_size_stride;  /* Reserved on Tavor */
 118         u8     sq_size_stride;  /* Reserved on Tavor */
 119         u8     rlkey_arbel_sched_queue; /* Reserved on Tavor */
 120         __be32 usr_page;
 121         __be32 local_qpn;
 122         __be32 remote_qpn;
 123         u32    reserved1[2];
 124         struct mthca_qp_path pri_path;
 125         struct mthca_qp_path alt_path;
 126         __be32 rdd;
 127         __be32 pd;
 128         __be32 wqe_base;
 129         __be32 wqe_lkey;
 130         __be32 params1;
 131         __be32 reserved2;
 132         __be32 next_send_psn;
 133         __be32 cqn_snd;
 134         __be32 snd_wqe_base_l;  /* Next send WQE on Tavor */
 135         __be32 snd_db_index;    /* (debugging only entries) */
 136         __be32 last_acked_psn;
 137         __be32 ssn;
 138         __be32 params2;
 139         __be32 rnr_nextrecvpsn;
 140         __be32 ra_buff_indx;
 141         __be32 cqn_rcv;
 142         __be32 rcv_wqe_base_l;  /* Next recv WQE on Tavor */
 143         __be32 rcv_db_index;    /* (debugging only entries) */
 144         __be32 qkey;
 145         __be32 srqn;
 146         __be32 rmsn;
 147         __be16 rq_wqe_counter;  /* reserved on Tavor */
 148         __be16 sq_wqe_counter;  /* reserved on Tavor */
 149         u32    reserved3[18];
 150 } __attribute__((packed));
 151
 152 struct mthca_qp_param {
 153         __be32 opt_param_mask;
 154         u32    reserved1;
 155         struct mthca_qp_context context;
 156         u32    reserved2[62];
 157 } __attribute__((packed));
 158
 159 enum {
 160         MTHCA_QP_OPTPAR_ALT_ADDR_PATH     = 1 << 0,
 161         MTHCA_QP_OPTPAR_RRE               = 1 << 1,
 162         MTHCA_QP_OPTPAR_RAE               = 1 << 2,
 163         MTHCA_QP_OPTPAR_RWE               = 1 << 3,
 164         MTHCA_QP_OPTPAR_PKEY_INDEX        = 1 << 4,
 165         MTHCA_QP_OPTPAR_Q_KEY             = 1 << 5,
 166         MTHCA_QP_OPTPAR_RNR_TIMEOUT       = 1 << 6,
 167         MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH = 1 << 7,
 168         MTHCA_QP_OPTPAR_SRA_MAX           = 1 << 8,
 169         MTHCA_QP_OPTPAR_RRA_MAX           = 1 << 9,
 170         MTHCA_QP_OPTPAR_PM_STATE          = 1 << 10,
 171         MTHCA_QP_OPTPAR_PORT_NUM          = 1 << 11,
 172         MTHCA_QP_OPTPAR_RETRY_COUNT       = 1 << 12,
 173         MTHCA_QP_OPTPAR_ALT_RNR_RETRY     = 1 << 13,
 174         MTHCA_QP_OPTPAR_ACK_TIMEOUT       = 1 << 14,
 175         MTHCA_QP_OPTPAR_RNR_RETRY         = 1 << 15,
 176         MTHCA_QP_OPTPAR_SCHED_QUEUE       = 1 << 16
 177 };
 178
 179 static const u8 mthca_opcode[] = {
 180         [IB_WR_SEND]                 = MTHCA_OPCODE_SEND,
 181         [IB_WR_SEND_WITH_IMM]        = MTHCA_OPCODE_SEND_IMM,
 182         [IB_WR_RDMA_WRITE]           = MTHCA_OPCODE_RDMA_WRITE,
 183         [IB_WR_RDMA_WRITE_WITH_IMM]  = MTHCA_OPCODE_RDMA_WRITE_IMM,
 184         [IB_WR_RDMA_READ]            = MTHCA_OPCODE_RDMA_READ,
 185         [IB_WR_ATOMIC_CMP_AND_SWP]   = MTHCA_OPCODE_ATOMIC_CS,
 186         [IB_WR_ATOMIC_FETCH_AND_ADD] = MTHCA_OPCODE_ATOMIC_FA,
 187 };
 188
 189 static int is_sqp(struct mthca_dev *dev, struct mthca_qp *qp)
 190 {
 191         return qp->qpn >= dev->qp_table.sqp_start &&
 192                 qp->qpn <= dev->qp_table.sqp_start + 3;
 193 }
 194
 195 static int is_qp0(struct mthca_dev *dev, struct mthca_qp *qp)
 196 {
 197         return qp->qpn >= dev->qp_table.sqp_start &&
 198                 qp->qpn <= dev->qp_table.sqp_start + 1;
 199 }
 200
 201 static void *get_recv_wqe(struct mthca_qp *qp, int n)
 202 {
 203         if (qp->is_direct)
 204                 return qp->queue.direct.buf + (n << qp->rq.wqe_shift);
 205         else
 206                 return qp->queue.page_list[(n << qp->rq.wqe_shift) >> PAGE_SHIFT].buf +
 207                         ((n << qp->rq.wqe_shift) & (PAGE_SIZE - 1));
 208 }
 209
 210 static void *get_send_wqe(struct mthca_qp *qp, int n)
 211 {
 212         if (qp->is_direct)
 213                 return qp->queue.direct.buf + qp->send_wqe_offset +
 214                         (n << qp->sq.wqe_shift);
 215         else
 216                 return qp->queue.page_list[(qp->send_wqe_offset +
 217                                             (n << qp->sq.wqe_shift)) >>
 218                                            PAGE_SHIFT].buf +
 219                         ((qp->send_wqe_offset + (n << qp->sq.wqe_shift)) &
 220                          (PAGE_SIZE - 1));
 221 }
 222
 223 static void mthca_wq_init(struct mthca_wq *wq)
 224 {
 225         spin_lock_init(&wq->lock);
 226         wq->next_ind  = 0;
 227         wq->last_comp = wq->max - 1;
 228         wq->head      = 0;
 229         wq->tail      = 0;
 230         wq->last      = NULL;
 231 }
 232
 233 void mthca_qp_event(struct mthca_dev *dev, u32 qpn,
 234                     enum ib_event_type event_type)
 235 {
 236         struct mthca_qp *qp;
 237         struct ib_event event;
 238
 239         spin_lock(&dev->qp_table.lock);
 240         qp = mthca_array_get(&dev->qp_table.qp, qpn & (dev->limits.num_qps - 1));
 241         if (qp)
 242                 atomic_inc(&qp->refcount);
 243         spin_unlock(&dev->qp_table.lock);
 244
 245         if (!qp) {
 246                 mthca_warn(dev, "Async event for bogus QP %08x\n", qpn);
 247                 return;
 248         }
 249
 250         event.device      = &dev->ib_dev;
 251         event.event       = event_type;
 252         event.element.qp  = &qp->ibqp;
 253         if (qp->ibqp.event_handler)
 254                 qp->ibqp.event_handler(&event, qp->ibqp.qp_context);
 255
 256         if (atomic_dec_and_test(&qp->refcount))
 257                 wake_up(&qp->wait);
 258 }
 259
 260 static int to_mthca_state(enum ib_qp_state ib_state)
 261 {
 262         switch (ib_state) {
 263         case IB_QPS_RESET: return MTHCA_QP_STATE_RST;
 264         case IB_QPS_INIT:  return MTHCA_QP_STATE_INIT;
 265         case IB_QPS_RTR:   return MTHCA_QP_STATE_RTR;
 266         case IB_QPS_RTS:   return MTHCA_QP_STATE_RTS;
 267         case IB_QPS_SQD:   return MTHCA_QP_STATE_SQD;
 268         case IB_QPS_SQE:   return MTHCA_QP_STATE_SQE;
 269         case IB_QPS_ERR:   return MTHCA_QP_STATE_ERR;
 270         default:                return -1;
 271         }
 272 }
 273
 274 enum { RC, UC, UD, RD, RDEE, MLX, NUM_TRANS };
 275
 276 static int to_mthca_st(int transport)
 277 {
 278         switch (transport) {
 279         case RC:  return MTHCA_QP_ST_RC;
 280         case UC:  return MTHCA_QP_ST_UC;
 281         case UD:  return MTHCA_QP_ST_UD;
 282         case RD:  return MTHCA_QP_ST_RD;
 283         case MLX: return MTHCA_QP_ST_MLX;
 284         default:  return -1;
 285         }
 286 }
 287
 288 static const struct {
 289         int trans;
 290         u32 req_param[NUM_TRANS];
 291         u32 opt_param[NUM_TRANS];
 292 } state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
 293         [IB_QPS_RESET] = {
 294                 [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
 295                 [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
 296                 [IB_QPS_INIT]  = {
 297                         .trans = MTHCA_TRANS_RST2INIT,
 298                         .req_param = {
 299                                 [UD]  = (IB_QP_PKEY_INDEX |
 300                                          IB_QP_PORT       |
 301                                          IB_QP_QKEY),
 302                                 [UC]  = (IB_QP_PKEY_INDEX |
 303                                          IB_QP_PORT       |
 304                                          IB_QP_ACCESS_FLAGS),
 305                                 [RC]  = (IB_QP_PKEY_INDEX |
 306                                          IB_QP_PORT       |
 307                                          IB_QP_ACCESS_FLAGS),
 308                                 [MLX] = (IB_QP_PKEY_INDEX |
 309                                          IB_QP_QKEY),
 310                         },
 311                         /* bug-for-bug compatibility with VAPI: */
 312                         .opt_param = {
 313                                 [MLX] = IB_QP_PORT
 314                         }
 315                 },
 316         },
 317         [IB_QPS_INIT]  = {
 318                 [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
 319                 [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
 320                 [IB_QPS_INIT]  = {
 321                         .trans = MTHCA_TRANS_INIT2INIT,
 322                         .opt_param = {
 323                                 [UD]  = (IB_QP_PKEY_INDEX |
 324                                          IB_QP_PORT       |
 325                                          IB_QP_QKEY),
 326                                 [UC]  = (IB_QP_PKEY_INDEX |
 327                                          IB_QP_PORT       |
 328                                          IB_QP_ACCESS_FLAGS),
 329                                 [RC]  = (IB_QP_PKEY_INDEX |
 330                                          IB_QP_PORT       |
 331                                          IB_QP_ACCESS_FLAGS),
 332                                 [MLX] = (IB_QP_PKEY_INDEX |
 333                                          IB_QP_QKEY),
 334                         }
 335                 },
 336                 [IB_QPS_RTR]   = {
 337                         .trans = MTHCA_TRANS_INIT2RTR,
 338                         .req_param = {
 339                                 [UC]  = (IB_QP_AV                  |
 340                                          IB_QP_PATH_MTU            |
 341                                          IB_QP_DEST_QPN            |
 342                                          IB_QP_RQ_PSN              |
 343                                          IB_QP_MAX_DEST_RD_ATOMIC),
 344                                 [RC]  = (IB_QP_AV                  |
 345                                          IB_QP_PATH_MTU            |
 346                                          IB_QP_DEST_QPN            |
 347                                          IB_QP_RQ_PSN              |
 348                                          IB_QP_MAX_DEST_RD_ATOMIC  |
 349                                          IB_QP_MIN_RNR_TIMER),
 350                         },
 351                         .opt_param = {
 352                                 [UD]  = (IB_QP_PKEY_INDEX |
 353                                          IB_QP_QKEY),
 354                                 [UC]  = (IB_QP_ALT_PATH     |
 355                                          IB_QP_ACCESS_FLAGS |
 356                                          IB_QP_PKEY_INDEX),
 357                                 [RC]  = (IB_QP_ALT_PATH     |
 358                                          IB_QP_ACCESS_FLAGS |
 359                                          IB_QP_PKEY_INDEX),
 360                                 [MLX] = (IB_QP_PKEY_INDEX |
 361                                          IB_QP_QKEY),
 362                         }
 363                 }
 364         },
 365         [IB_QPS_RTR]   = {
 366                 [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
 367                 [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
 368                 [IB_QPS_RTS]   = {
 369                         .trans = MTHCA_TRANS_RTR2RTS,
 370                         .req_param = {
 371                                 [UD]  = IB_QP_SQ_PSN,
 372                                 [UC]  = (IB_QP_SQ_PSN            |
 373                                          IB_QP_MAX_QP_RD_ATOMIC),
 374                                 [RC]  = (IB_QP_TIMEOUT           |
 375                                          IB_QP_RETRY_CNT         |
 376                                          IB_QP_RNR_RETRY         |
 377                                          IB_QP_SQ_PSN            |
 378                                          IB_QP_MAX_QP_RD_ATOMIC),
 379                                 [MLX] = IB_QP_SQ_PSN,
 380                         },
 381                         .opt_param = {
 382                                 [UD]  = (IB_QP_CUR_STATE             |
 383                                          IB_QP_QKEY),
 384                                 [UC]  = (IB_QP_CUR_STATE             |
 385                                          IB_QP_ALT_PATH              |
 386                                          IB_QP_ACCESS_FLAGS          |
 387                                          IB_QP_PKEY_INDEX            |
 388                                          IB_QP_PATH_MIG_STATE),
 389                                 [RC]  = (IB_QP_CUR_STATE             |
 390                                          IB_QP_ALT_PATH              |
 391                                          IB_QP_ACCESS_FLAGS          |
 392                                          IB_QP_PKEY_INDEX            |
 393                                          IB_QP_MIN_RNR_TIMER         |
 394                                          IB_QP_PATH_MIG_STATE),
 395                                 [MLX] = (IB_QP_CUR_STATE             |
 396                                          IB_QP_QKEY),
 397                         }
 398                 }
 399         },
 400         [IB_QPS_RTS]   = {
 401                 [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
 402                 [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
 403                 [IB_QPS_RTS]   = {
 404                         .trans = MTHCA_TRANS_RTS2RTS,
 405                         .opt_param = {
 406                                 [UD]  = (IB_QP_CUR_STATE             |
 407                                          IB_QP_QKEY),
 408                                 [UC]  = (IB_QP_ACCESS_FLAGS          |
 409                                          IB_QP_ALT_PATH              |
 410                                          IB_QP_PATH_MIG_STATE),
 411                                 [RC]  = (IB_QP_ACCESS_FLAGS          |
 412                                          IB_QP_ALT_PATH              |
 413                                          IB_QP_PATH_MIG_STATE        |
 414                                          IB_QP_MIN_RNR_TIMER),
 415                                 [MLX] = (IB_QP_CUR_STATE             |
 416                                          IB_QP_QKEY),
 417                         }
 418                 },
 419                 [IB_QPS_SQD]   = {
 420                         .trans = MTHCA_TRANS_RTS2SQD,
 421                 },
 422         },
 423         [IB_QPS_SQD]   = {
 424                 [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
 425                 [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
 426                 [IB_QPS_RTS]   = {
 427                         .trans = MTHCA_TRANS_SQD2RTS,
 428                         .opt_param = {
 429                                 [UD]  = (IB_QP_CUR_STATE             |
 430                                          IB_QP_QKEY),
 431                                 [UC]  = (IB_QP_CUR_STATE             |
 432                                          IB_QP_ALT_PATH              |
 433                                          IB_QP_ACCESS_FLAGS          |
 434                                          IB_QP_PATH_MIG_STATE),
 435                                 [RC]  = (IB_QP_CUR_STATE             |
 436                                          IB_QP_ALT_PATH              |
 437                                          IB_QP_ACCESS_FLAGS          |
 438                                          IB_QP_MIN_RNR_TIMER         |
 439                                          IB_QP_PATH_MIG_STATE),
 440                                 [MLX] = (IB_QP_CUR_STATE             |
 441                                          IB_QP_QKEY),
 442                         }
 443                 },
 444                 [IB_QPS_SQD]   = {
 445                         .trans = MTHCA_TRANS_SQD2SQD,
 446                         .opt_param = {
 447                                 [UD]  = (IB_QP_PKEY_INDEX            |
 448                                          IB_QP_QKEY),
 449                                 [UC]  = (IB_QP_AV                    |
 450                                          IB_QP_MAX_QP_RD_ATOMIC      |
 451                                          IB_QP_MAX_DEST_RD_ATOMIC    |
 452                                          IB_QP_CUR_STATE             |
 453                                          IB_QP_ALT_PATH              |
 454                                          IB_QP_ACCESS_FLAGS          |
 455                                          IB_QP_PKEY_INDEX            |
 456                                          IB_QP_PATH_MIG_STATE),
 457                                 [RC]  = (IB_QP_AV                    |
 458                                          IB_QP_TIMEOUT               |
 459                                          IB_QP_RETRY_CNT             |
 460                                          IB_QP_RNR_RETRY             |
 461                                          IB_QP_MAX_QP_RD_ATOMIC      |
 462                                          IB_QP_MAX_DEST_RD_ATOMIC    |
 463                                          IB_QP_CUR_STATE             |
 464                                          IB_QP_ALT_PATH              |
 465                                          IB_QP_ACCESS_FLAGS          |
 466                                          IB_QP_PKEY_INDEX            |
 467                                          IB_QP_MIN_RNR_TIMER         |
 468                                          IB_QP_PATH_MIG_STATE),
 469                                 [MLX] = (IB_QP_PKEY_INDEX            |
 470                                          IB_QP_QKEY),
 471                         }
 472                 }
 473         },
 474         [IB_QPS_SQE]   = {
 475                 [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
 476                 [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
 477                 [IB_QPS_RTS]   = {
 478                         .trans = MTHCA_TRANS_SQERR2RTS,
 479                         .opt_param = {
 480                                 [UD]  = (IB_QP_CUR_STATE             |
 481                                          IB_QP_QKEY),
 482                                 [UC]  = (IB_QP_CUR_STATE),
 483                                 [RC]  = (IB_QP_CUR_STATE             |
 484                                          IB_QP_MIN_RNR_TIMER),
 485                                 [MLX] = (IB_QP_CUR_STATE             |
 486                                          IB_QP_QKEY),
 487                         }
 488                 }
 489         },
 490         [IB_QPS_ERR] = {
 491                 [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
 492                 [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR }
 493         }
 494 };
 495
 496 static void store_attrs(struct mthca_sqp *sqp, struct ib_qp_attr *attr,
 497                         int attr_mask)
 498 {
 499         if (attr_mask & IB_QP_PKEY_INDEX)
 500                 sqp->pkey_index = attr->pkey_index;
 501         if (attr_mask & IB_QP_QKEY)
 502                 sqp->qkey = attr->qkey;
 503         if (attr_mask & IB_QP_SQ_PSN)
 504                 sqp->send_psn = attr->sq_psn;
 505 }
 506
 507 static void init_port(struct mthca_dev *dev, int port)
 508 {
 509         int err;
 510         u8 status;
 511         struct mthca_init_ib_param param;
 512
 513         memset(&param, 0, sizeof param);
 514
 515         param.port_width = dev->limits.port_width_cap;
 516         param.vl_cap     = dev->limits.vl_cap;
 517         param.mtu_cap    = dev->limits.mtu_cap;
 518         param.gid_cap    = dev->limits.gid_table_len;
 519         param.pkey_cap   = dev->limits.pkey_table_len;
 520
 521         err = mthca_INIT_IB(dev, &param, port, &status);
 522         if (err)
 523                 mthca_warn(dev, "INIT_IB failed, return code %d.\n", err);
 524         if (status)
 525                 mthca_warn(dev, "INIT_IB returned status %02x.\n", status);
 526 }
 527
 528 int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
 529 {
 530         struct mthca_dev *dev = to_mdev(ibqp->device);
 531         struct mthca_qp *qp = to_mqp(ibqp);
 532         enum ib_qp_state cur_state, new_state;
 533         struct mthca_mailbox *mailbox;
 534         struct mthca_qp_param *qp_param;
 535         struct mthca_qp_context *qp_context;
 536         u32 req_param, opt_param;
 537         u8 status;
 538         int err;
 539
 540         if (attr_mask & IB_QP_CUR_STATE) {
 541                 if (attr->cur_qp_state != IB_QPS_RTR &&
 542                     attr->cur_qp_state != IB_QPS_RTS &&
 543                     attr->cur_qp_state != IB_QPS_SQD &&
 544                     attr->cur_qp_state != IB_QPS_SQE)
 545                         return -EINVAL;
 546                 else
 547                         cur_state = attr->cur_qp_state;
 548         } else {
 549                 spin_lock_irq(&qp->sq.lock);
 550                 spin_lock(&qp->rq.lock);
 551                 cur_state = qp->state;
 552                 spin_unlock(&qp->rq.lock);
 553                 spin_unlock_irq(&qp->sq.lock);
 554         }
 555
 556         if (attr_mask & IB_QP_STATE) {
 557                if (attr->qp_state < 0 || attr->qp_state > IB_QPS_ERR)
 558                         return -EINVAL;
 559                 new_state = attr->qp_state;
 560         } else
 561                 new_state = cur_state;
 562
 563         if (state_table[cur_state][new_state].trans == MTHCA_TRANS_INVALID) {
 564                 mthca_dbg(dev, "Illegal QP transition "
 565                           "%d->%d\n", cur_state, new_state);
 566                 return -EINVAL;
 567         }
 568
 569         req_param = state_table[cur_state][new_state].req_param[qp->transport];
 570         opt_param = state_table[cur_state][new_state].opt_param[qp->transport];
 571
 572         if ((req_param & attr_mask) != req_param) {
 573                 mthca_dbg(dev, "QP transition "
 574                           "%d->%d missing req attr 0x%08x\n",
 575                           cur_state, new_state,
 576                           req_param & ~attr_mask);
 577                 return -EINVAL;
 578         }
 579
 580         if (attr_mask & ~(req_param | opt_param | IB_QP_STATE)) {
 581                 mthca_dbg(dev, "QP transition (transport %d) "
 582                           "%d->%d has extra attr 0x%08x\n",
 583                           qp->transport,
 584                           cur_state, new_state,
 585                           attr_mask & ~(req_param | opt_param |
 586                                                  IB_QP_STATE));
 587                 return -EINVAL;
 588         }
 589
 590         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
 591         if (IS_ERR(mailbox))
 592                 return PTR_ERR(mailbox);
 593         qp_param = mailbox->buf;
 594         qp_context = &qp_param->context;
 595         memset(qp_param, 0, sizeof *qp_param);
 596
 597         qp_context->flags      = cpu_to_be32((to_mthca_state(new_state) << 28) |
 598                                              (to_mthca_st(qp->transport) << 16));
 599         qp_context->flags     |= cpu_to_be32(MTHCA_QP_BIT_DE);
 600         if (!(attr_mask & IB_QP_PATH_MIG_STATE))
 601                 qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_MIGRATED << 11);
 602         else {
 603                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PM_STATE);
 604                 switch (attr->path_mig_state) {
 605                 case IB_MIG_MIGRATED:
 606                         qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_MIGRATED << 11);
 607                         break;
 608                 case IB_MIG_REARM:
 609                         qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_REARM << 11);
 610                         break;
 611                 case IB_MIG_ARMED:
 612                         qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_ARMED << 11);
 613                         break;
 614                 }
 615         }
 616
 617         /* leave tavor_sched_queue as 0 */
 618
 619         if (qp->transport == MLX || qp->transport == UD)
 620                 qp_context->mtu_msgmax = (IB_MTU_2048 << 5) | 11;
 621         else if (attr_mask & IB_QP_PATH_MTU)
 622                 qp_context->mtu_msgmax = (attr->path_mtu << 5) | 31;
 623
 624         if (mthca_is_memfree(dev)) {
 625                 if (qp->rq.max)
 626                         qp_context->rq_size_stride = long_log2(qp->rq.max) << 3;
 627                 qp_context->rq_size_stride |= qp->rq.wqe_shift - 4;
 628
 629                 if (qp->sq.max)
 630                         qp_context->sq_size_stride = long_log2(qp->sq.max) << 3;
 631                 qp_context->sq_size_stride |= qp->sq.wqe_shift - 4;
 632         }
 633
 634         /* leave arbel_sched_queue as 0 */
 635
 636         if (qp->ibqp.uobject)
 637                 qp_context->usr_page =
 638                         cpu_to_be32(to_mucontext(qp->ibqp.uobject->context)->uar.index);
 639         else
 640                 qp_context->usr_page = cpu_to_be32(dev->driver_uar.index);
 641         qp_context->local_qpn  = cpu_to_be32(qp->qpn);
 642         if (attr_mask & IB_QP_DEST_QPN) {
 643                 qp_context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
 644         }
 645
 646         if (qp->transport == MLX)
 647                 qp_context->pri_path.port_pkey |=
 648                         cpu_to_be32(to_msqp(qp)->port << 24);
 649         else {
 650                 if (attr_mask & IB_QP_PORT) {
 651                         qp_context->pri_path.port_pkey |=
 652                                 cpu_to_be32(attr->port_num << 24);
 653                         qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PORT_NUM);
 654                 }
 655         }
 656
 657         if (attr_mask & IB_QP_PKEY_INDEX) {
 658                 qp_context->pri_path.port_pkey |=
 659                         cpu_to_be32(attr->pkey_index);
 660                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PKEY_INDEX);
 661         }
 662
 663         if (attr_mask & IB_QP_RNR_RETRY) {
 664                 qp_context->pri_path.rnr_retry = attr->rnr_retry << 5;
 665                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_RETRY);
 666         }
 667
 668         if (attr_mask & IB_QP_AV) {
 669                 qp_context->pri_path.g_mylmc     = attr->ah_attr.src_path_bits & 0x7f;
 670                 qp_context->pri_path.rlid        = cpu_to_be16(attr->ah_attr.dlid);
 671                 qp_context->pri_path.static_rate = !!attr->ah_attr.static_rate;
 672                 if (attr->ah_attr.ah_flags & IB_AH_GRH) {
 673                         qp_context->pri_path.g_mylmc |= 1 << 7;
 674                         qp_context->pri_path.mgid_index = attr->ah_attr.grh.sgid_index;
 675                         qp_context->pri_path.hop_limit = attr->ah_attr.grh.hop_limit;
 676                         qp_context->pri_path.sl_tclass_flowlabel =
 677                                 cpu_to_be32((attr->ah_attr.sl << 28)                |
 678                                             (attr->ah_attr.grh.traffic_class << 20) |
 679                                             (attr->ah_attr.grh.flow_label));
 680                         memcpy(qp_context->pri_path.rgid,
 681                                attr->ah_attr.grh.dgid.raw, 16);
 682                 } else {
 683                         qp_context->pri_path.sl_tclass_flowlabel =
 684                                 cpu_to_be32(attr->ah_attr.sl << 28);
 685                 }
 686                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH);
 687         }
 688
 689         if (attr_mask & IB_QP_TIMEOUT) {
 690                 qp_context->pri_path.ackto = attr->timeout;
 691                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ACK_TIMEOUT);
 692         }
 693
 694         /* XXX alt_path */
 695
 696         /* leave rdd as 0 */
 697         qp_context->pd         = cpu_to_be32(to_mpd(ibqp->pd)->pd_num);
 698         /* leave wqe_base as 0 (we always create an MR based at 0 for WQs) */
 699         qp_context->wqe_lkey   = cpu_to_be32(qp->mr.ibmr.lkey);
 700         qp_context->params1    = cpu_to_be32((MTHCA_ACK_REQ_FREQ << 28) |
 701                                              (MTHCA_FLIGHT_LIMIT << 24) |
 702                                              MTHCA_QP_BIT_SRE           |
 703                                              MTHCA_QP_BIT_SWE           |
 704                                              MTHCA_QP_BIT_SAE);
 705         if (qp->sq_policy == IB_SIGNAL_ALL_WR)
 706                 qp_context->params1 |= cpu_to_be32(MTHCA_QP_BIT_SSC);
 707         if (attr_mask & IB_QP_RETRY_CNT) {
 708                 qp_context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
 709                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RETRY_COUNT);
 710         }
 711
 712         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
 713                 qp_context->params1 |= cpu_to_be32(min(attr->max_rd_atomic ?
 714                                                        ffs(attr->max_rd_atomic) - 1 : 0,
 715                                                        7) << 21);
 716                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_SRA_MAX);
 717         }
 718
 719         if (attr_mask & IB_QP_SQ_PSN)
 720                 qp_context->next_send_psn = cpu_to_be32(attr->sq_psn);
 721         qp_context->cqn_snd = cpu_to_be32(to_mcq(ibqp->send_cq)->cqn);
 722
 723         if (mthca_is_memfree(dev)) {
 724                 qp_context->snd_wqe_base_l = cpu_to_be32(qp->send_wqe_offset);
 725                 qp_context->snd_db_index   = cpu_to_be32(qp->sq.db_index);
 726         }
 727
 728         if (attr_mask & IB_QP_ACCESS_FLAGS) {
 729                 /*
 730                  * Only enable RDMA/atomics if we have responder
 731                  * resources set to a non-zero value.
 732                  */
 733                 if (qp->resp_depth) {
 734                         qp_context->params2 |=
 735                                 cpu_to_be32(attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE ?
 736                                             MTHCA_QP_BIT_RWE : 0);
 737                         qp_context->params2 |=
 738                                 cpu_to_be32(attr->qp_access_flags & IB_ACCESS_REMOTE_READ ?
 739                                             MTHCA_QP_BIT_RRE : 0);
 740                         qp_context->params2 |=
 741                                 cpu_to_be32(attr->qp_access_flags & IB_ACCESS_REMOTE_ATOMIC ?
 742                                             MTHCA_QP_BIT_RAE : 0);
 743                 }
 744
 745                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE |
 746                                                         MTHCA_QP_OPTPAR_RRE |
 747                                                         MTHCA_QP_OPTPAR_RAE);
 748
 749                 qp->atomic_rd_en = attr->qp_access_flags;
 750         }
 751
 752         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 753                 u8 rra_max;
 754
 755                 if (qp->resp_depth && !attr->max_dest_rd_atomic) {
 756                         /*
 757                          * Lowering our responder resources to zero.
 758                          * Turn off RDMA/atomics as responder.
 759                          * (RWE/RRE/RAE in params2 already zero)
 760                          */
 761                         qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE |
 762                                                                 MTHCA_QP_OPTPAR_RRE |
 763                                                                 MTHCA_QP_OPTPAR_RAE);
 764                 }
 765
 766                 if (!qp->resp_depth && attr->max_dest_rd_atomic) {
 767                         /*
 768                          * Increasing our responder resources from
 769                          * zero.  Turn on RDMA/atomics as appropriate.
 770                          */
 771                         qp_context->params2 |=
 772                                 cpu_to_be32(qp->atomic_rd_en & IB_ACCESS_REMOTE_WRITE ?
 773                                             MTHCA_QP_BIT_RWE : 0);
 774                         qp_context->params2 |=
 775                                 cpu_to_be32(qp->atomic_rd_en & IB_ACCESS_REMOTE_READ ?
 776                                             MTHCA_QP_BIT_RRE : 0);
 777                         qp_context->params2 |=
 778                                 cpu_to_be32(qp->atomic_rd_en & IB_ACCESS_REMOTE_ATOMIC ?
 779                                             MTHCA_QP_BIT_RAE : 0);
 780
 781                         qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE |
 782                                                                 MTHCA_QP_OPTPAR_RRE |
 783                                                                 MTHCA_QP_OPTPAR_RAE);
 784                 }
 785
 786                 for (rra_max = 0;
 787                      1 << rra_max < attr->max_dest_rd_atomic &&
 788                              rra_max < dev->qp_table.rdb_shift;
 789                      ++rra_max)
 790                         ; /* nothing */
 791
 792                 qp_context->params2      |= cpu_to_be32(rra_max << 21);
 793                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RRA_MAX);
 794
 795                 qp->resp_depth = attr->max_dest_rd_atomic;
 796         }
 797
 798         qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RSC);
 799
 800         if (ibqp->srq)
 801                 qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RIC);
 802
 803         if (attr_mask & IB_QP_MIN_RNR_TIMER) {
 804                 qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
 805                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_TIMEOUT);
 806         }
 807         if (attr_mask & IB_QP_RQ_PSN)
 808                 qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
 809
 810         qp_context->ra_buff_indx =
 811                 cpu_to_be32(dev->qp_table.rdb_base +
 812                             ((qp->qpn & (dev->limits.num_qps - 1)) * MTHCA_RDB_ENTRY_SIZE <<
 813                              dev->qp_table.rdb_shift));
 814
 815         qp_context->cqn_rcv = cpu_to_be32(to_mcq(ibqp->recv_cq)->cqn);
 816
 817         if (mthca_is_memfree(dev))
 818                 qp_context->rcv_db_index   = cpu_to_be32(qp->rq.db_index);
 819
 820         if (attr_mask & IB_QP_QKEY) {
 821                 qp_context->qkey = cpu_to_be32(attr->qkey);
 822                 qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_Q_KEY);
 823         }
 824
 825         if (ibqp->srq)
 826                 qp_context->srqn = cpu_to_be32(1 << 24 |
 827                                                to_msrq(ibqp->srq)->srqn);
 828
 829         err = mthca_MODIFY_QP(dev, state_table[cur_state][new_state].trans,
 830                               qp->qpn, 0, mailbox, 0, &status);
 831         if (status) {
 832                 mthca_warn(dev, "modify QP %d returned status %02x.\n",
 833                            state_table[cur_state][new_state].trans, status);
 834                 err = -EINVAL;
 835         }
 836
 837         if (!err)
 838                 qp->state = new_state;
 839
 840         mthca_free_mailbox(dev, mailbox);
 841
 842         if (is_sqp(dev, qp))
 843                 store_attrs(to_msqp(qp), attr, attr_mask);
 844
 845         /*
 846          * If we moved QP0 to RTR, bring the IB link up; if we moved
 847          * QP0 to RESET or ERROR, bring the link back down.
 848          */
 849         if (is_qp0(dev, qp)) {
 850                 if (cur_state != IB_QPS_RTR &&
 851                     new_state == IB_QPS_RTR)
 852                         init_port(dev, to_msqp(qp)->port);
 853
 854                 if (cur_state != IB_QPS_RESET &&
 855                     cur_state != IB_QPS_ERR &&
 856                     (new_state == IB_QPS_RESET ||
 857                      new_state == IB_QPS_ERR))
 858                         mthca_CLOSE_IB(dev, to_msqp(qp)->port, &status);
 859         }
 860
 861         /*
 862          * If we moved a kernel QP to RESET, clean up all old CQ
 863          * entries and reinitialize the QP.
 864          */
 865         if (!err && new_state == IB_QPS_RESET && !qp->ibqp.uobject) {
 866                 mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq)->cqn, qp->qpn,
 867                                qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
 868                 if (qp->ibqp.send_cq != qp->ibqp.recv_cq)
 869                         mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq)->cqn, qp->qpn,
 870                                        qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
 871
 872                 mthca_wq_init(&qp->sq);
 873                 mthca_wq_init(&qp->rq);
 874
 875                 if (mthca_is_memfree(dev)) {
 876                         *qp->sq.db = 0;
 877                         *qp->rq.db = 0;
 878                 }
 879         }
 880
 881         return err;
 882 }
 883
 884 /*
 885  * Allocate and register buffer for WQEs.  qp->rq.max, sq.max,
 886  * rq.max_gs and sq.max_gs must all be assigned.
 887  * mthca_alloc_wqe_buf will calculate rq.wqe_shift and
 888  * sq.wqe_shift (as well as send_wqe_offset, is_direct, and
 889  * queue)
 890  */
 891 static int mthca_alloc_wqe_buf(struct mthca_dev *dev,
 892                                struct mthca_pd *pd,
 893                                struct mthca_qp *qp)
 894 {
 895         int size;
 896         int err = -ENOMEM;
 897
 898         size = sizeof (struct mthca_next_seg) +
 899                 qp->rq.max_gs * sizeof (struct mthca_data_seg);
 900
 901         for (qp->rq.wqe_shift = 6; 1 << qp->rq.wqe_shift < size;
 902              qp->rq.wqe_shift++)
 903                 ; /* nothing */
 904
 905         size = sizeof (struct mthca_next_seg) +
 906                 qp->sq.max_gs * sizeof (struct mthca_data_seg);
 907         switch (qp->transport) {
 908         case MLX:
 909                 size += 2 * sizeof (struct mthca_data_seg);
 910                 break;
 911         case UD:
 912                 if (mthca_is_memfree(dev))
 913                         size += sizeof (struct mthca_arbel_ud_seg);
 914                 else
 915                         size += sizeof (struct mthca_tavor_ud_seg);
 916                 break;
 917         default:
 918                 /* bind seg is as big as atomic + raddr segs */
 919                 size += sizeof (struct mthca_bind_seg);
 920         }
 921
 922         for (qp->sq.wqe_shift = 6; 1 << qp->sq.wqe_shift < size;
 923              qp->sq.wqe_shift++)
 924                 ; /* nothing */
 925
 926         qp->send_wqe_offset = ALIGN(qp->rq.max << qp->rq.wqe_shift,
 927                                     1 << qp->sq.wqe_shift);
 928
 929         /*
 930          * If this is a userspace QP, we don't actually have to
 931          * allocate anything.  All we need is to calculate the WQE
 932          * sizes and the send_wqe_offset, so we're done now.
 933          */
 934         if (pd->ibpd.uobject)
 935                 return 0;
 936
 937         size = PAGE_ALIGN(qp->send_wqe_offset +
 938                           (qp->sq.max << qp->sq.wqe_shift));
 939
 940         qp->wrid = kmalloc((qp->rq.max + qp->sq.max) * sizeof (u64),
 941                            GFP_KERNEL);
 942         if (!qp->wrid)
 943                 goto err_out;
 944
 945         err = mthca_buf_alloc(dev, size, MTHCA_MAX_DIRECT_QP_SIZE,
 946                               &qp->queue, &qp->is_direct, pd, 0, &qp->mr);
 947         if (err)
 948                 goto err_out;
 949
 950         return 0;
 951
 952 err_out:
 953         kfree(qp->wrid);
 954         return err;
 955 }
 956
 957 static void mthca_free_wqe_buf(struct mthca_dev *dev,
 958                                struct mthca_qp *qp)
 959 {
 960         mthca_buf_free(dev, PAGE_ALIGN(qp->send_wqe_offset +
 961                                        (qp->sq.max << qp->sq.wqe_shift)),
 962                        &qp->queue, qp->is_direct, &qp->mr);
 963         kfree(qp->wrid);
 964 }
 965
 966 static int mthca_map_memfree(struct mthca_dev *dev,
 967                              struct mthca_qp *qp)
 968 {
 969         int ret;
 970
 971         if (mthca_is_memfree(dev)) {
 972                 ret = mthca_table_get(dev, dev->qp_table.qp_table, qp->qpn);
 973                 if (ret)
 974                         return ret;
 975
 976                 ret = mthca_table_get(dev, dev->qp_table.eqp_table, qp->qpn);
 977                 if (ret)
 978                         goto err_qpc;
 979
 980                 ret = mthca_table_get(dev, dev->qp_table.rdb_table,
 981                                       qp->qpn << dev->qp_table.rdb_shift);
 982                 if (ret)
 983                         goto err_eqpc;
 984
 985         }
 986
 987         return 0;
 988
 989 err_eqpc:
 990         mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
 991
 992 err_qpc:
 993         mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn);
 994
 995         return ret;
 996 }
 997
 998 static void mthca_unmap_memfree(struct mthca_dev *dev,
 999                                 struct mthca_qp *qp)
1000 {
1001         mthca_table_put(dev, dev->qp_table.rdb_table,
1002                         qp->qpn << dev->qp_table.rdb_shift);
1003         mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
1004         mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn);
1005 }
1006
1007 static int mthca_alloc_memfree(struct mthca_dev *dev,
1008                                struct mthca_qp *qp)
1009 {
1010         int ret = 0;
1011
1012         if (mthca_is_memfree(dev)) {
1013                 qp->rq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_RQ,
1014                                                  qp->qpn, &qp->rq.db);
1015                 if (qp->rq.db_index < 0)
1016                         return ret;
1017
1018                 qp->sq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SQ,
1019                                                  qp->qpn, &qp->sq.db);
1020                 if (qp->sq.db_index < 0)
1021                         mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
1022         }
1023
1024         return ret;
1025 }
1026
1027 static void mthca_free_memfree(struct mthca_dev *dev,
1028                                struct mthca_qp *qp)
1029 {
1030         if (mthca_is_memfree(dev)) {
1031                 mthca_free_db(dev, MTHCA_DB_TYPE_SQ, qp->sq.db_index);
1032                 mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
1033         }
1034 }
1035
1036 static int mthca_alloc_qp_common(struct mthca_dev *dev,
1037                                  struct mthca_pd *pd,
1038                                  struct mthca_cq *send_cq,
1039                                  struct mthca_cq *recv_cq,
1040                                  enum ib_sig_type send_policy,
1041                                  struct mthca_qp *qp)
1042 {
1043         int ret;
1044         int i;
1045
1046         atomic_set(&qp->refcount, 1);
1047         qp->state        = IB_QPS_RESET;
1048         qp->atomic_rd_en = 0;
1049         qp->resp_depth   = 0;
1050         qp->sq_policy    = send_policy;
1051         mthca_wq_init(&qp->sq);
1052         mthca_wq_init(&qp->rq);
1053
1054         ret = mthca_map_memfree(dev, qp);
1055         if (ret)
1056                 return ret;
1057
1058         ret = mthca_alloc_wqe_buf(dev, pd, qp);
1059         if (ret) {
1060                 mthca_unmap_memfree(dev, qp);
1061                 return ret;
1062         }
1063
1064         /*
1065          * If this is a userspace QP, we're done now.  The doorbells
1066          * will be allocated and buffers will be initialized in
1067          * userspace.
1068          */
1069         if (pd->ibpd.uobject)
1070                 return 0;
1071
1072         ret = mthca_alloc_memfree(dev, qp);
1073         if (ret) {
1074                 mthca_free_wqe_buf(dev, qp);
1075                 mthca_unmap_memfree(dev, qp);
1076                 return ret;
1077         }
1078
1079         if (mthca_is_memfree(dev)) {
1080                 struct mthca_next_seg *next;
1081                 struct mthca_data_seg *scatter;
1082                 int size = (sizeof (struct mthca_next_seg) +
1083                             qp->rq.max_gs * sizeof (struct mthca_data_seg)) / 16;
1084
1085                 for (i = 0; i < qp->rq.max; ++i) {
1086                         next = get_recv_wqe(qp, i);
1087                         next->nda_op = cpu_to_be32(((i + 1) & (qp->rq.max - 1)) <<
1088                                                    qp->rq.wqe_shift);
1089                         next->ee_nds = cpu_to_be32(size);
1090
1091                         for (scatter = (void *) (next + 1);
1092                              (void *) scatter < (void *) next + (1 << qp->rq.wqe_shift);
1093                              ++scatter)
1094                                 scatter->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
1095                 }
1096
1097                 for (i = 0; i < qp->sq.max; ++i) {
1098                         next = get_send_wqe(qp, i);
1099                         next->nda_op = cpu_to_be32((((i + 1) & (qp->sq.max - 1)) <<
1100                                                     qp->sq.wqe_shift) +
1101                                                    qp->send_wqe_offset);
1102                 }
1103         }
1104
1105         return 0;
1106 }
1107
1108 static int mthca_set_qp_size(struct mthca_dev *dev, struct ib_qp_cap *cap,
1109                              struct mthca_qp *qp)
1110 {
1111         /* Sanity check QP size before proceeding */
1112         if (cap->max_send_wr  > 65536 || cap->max_recv_wr  > 65536 ||
1113             cap->max_send_sge > 64    || cap->max_recv_sge > 64)
1114                 return -EINVAL;
1115
1116         if (mthca_is_memfree(dev)) {
1117                 qp->rq.max = cap->max_recv_wr ?
1118                         roundup_pow_of_two(cap->max_recv_wr) : 0;
1119                 qp->sq.max = cap->max_send_wr ?
1120                         roundup_pow_of_two(cap->max_send_wr) : 0;
1121         } else {
1122                 qp->rq.max = cap->max_recv_wr;
1123                 qp->sq.max = cap->max_send_wr;
1124         }
1125
1126         qp->rq.max_gs = cap->max_recv_sge;
1127         qp->sq.max_gs = max_t(int, cap->max_send_sge,
1128                               ALIGN(cap->max_inline_data + MTHCA_INLINE_HEADER_SIZE,
1129                                     MTHCA_INLINE_CHUNK_SIZE) /
1130                               sizeof (struct mthca_data_seg));
1131
1132         /*
1133          * For MLX transport we need 2 extra S/G entries:
1134          * one for the header and one for the checksum at the end
1135          */
1136         if ((qp->transport == MLX && qp->sq.max_gs + 2 > dev->limits.max_sg) ||
1137             qp->sq.max_gs > dev->limits.max_sg || qp->rq.max_gs > dev->limits.max_sg)
1138                 return -EINVAL;
1139
1140         return 0;
1141 }
1142
1143 int mthca_alloc_qp(struct mthca_dev *dev,
1144                    struct mthca_pd *pd,
1145                    struct mthca_cq *send_cq,
1146                    struct mthca_cq *recv_cq,
1147                    enum ib_qp_type type,
1148                    enum ib_sig_type send_policy,
1149                    struct ib_qp_cap *cap,
1150                    struct mthca_qp *qp)
1151 {
1152         int err;
1153
1154         err = mthca_set_qp_size(dev, cap, qp);
1155         if (err)
1156                 return err;
1157
1158         switch (type) {
1159         case IB_QPT_RC: qp->transport = RC; break;
1160         case IB_QPT_UC: qp->transport = UC; break;
1161         case IB_QPT_UD: qp->transport = UD; break;
1162         default: return -EINVAL;
1163         }
1164
1165         qp->qpn = mthca_alloc(&dev->qp_table.alloc);
1166         if (qp->qpn == -1)
1167                 return -ENOMEM;
1168
1169         err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq,
1170                                     send_policy, qp);
1171         if (err) {
1172                 mthca_free(&dev->qp_table.alloc, qp->qpn);
1173                 return err;
1174         }
1175
1176         spin_lock_irq(&dev->qp_table.lock);
1177         mthca_array_set(&dev->qp_table.qp,
1178                         qp->qpn & (dev->limits.num_qps - 1), qp);
1179         spin_unlock_irq(&dev->qp_table.lock);
1180
1181         return 0;
1182 }
1183
1184 int mthca_alloc_sqp(struct mthca_dev *dev,
1185                     struct mthca_pd *pd,
1186                     struct mthca_cq *send_cq,
1187                     struct mthca_cq *recv_cq,
1188                     enum ib_sig_type send_policy,
1189                     struct ib_qp_cap *cap,
1190                     int qpn,
1191                     int port,
1192                     struct mthca_sqp *sqp)
1193 {
1194         u32 mqpn = qpn * 2 + dev->qp_table.sqp_start + port - 1;
1195         int err;
1196
1197         err = mthca_set_qp_size(dev, cap, &sqp->qp);
1198         if (err)
1199                 return err;
1200
1201         sqp->header_buf_size = sqp->qp.sq.max * MTHCA_UD_HEADER_SIZE;
1202         sqp->header_buf = dma_alloc_coherent(&dev->pdev->dev, sqp->header_buf_size,
1203                                              &sqp->header_dma, GFP_KERNEL);
1204         if (!sqp->header_buf)
1205                 return -ENOMEM;
1206
1207         spin_lock_irq(&dev->qp_table.lock);
1208         if (mthca_array_get(&dev->qp_table.qp, mqpn))
1209                 err = -EBUSY;
1210         else
1211                 mthca_array_set(&dev->qp_table.qp, mqpn, sqp);
1212         spin_unlock_irq(&dev->qp_table.lock);
1213
1214         if (err)
1215                 goto err_out;
1216
1217         sqp->port = port;
1218         sqp->qp.qpn       = mqpn;
1219         sqp->qp.transport = MLX;
1220
1221         err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq,
1222                                     send_policy, &sqp->qp);
1223         if (err)
1224                 goto err_out_free;
1225
1226         atomic_inc(&pd->sqp_count);
1227
1228         return 0;
1229
1230  err_out_free:
1231         /*
1232          * Lock CQs here, so that CQ polling code can do QP lookup
1233          * without taking a lock.
1234          */
1235         spin_lock_irq(&send_cq->lock);
1236         if (send_cq != recv_cq)
1237                 spin_lock(&recv_cq->lock);
1238
1239         spin_lock(&dev->qp_table.lock);
1240         mthca_array_clear(&dev->qp_table.qp, mqpn);
1241         spin_unlock(&dev->qp_table.lock);
1242
1243         if (send_cq != recv_cq)
1244                 spin_unlock(&recv_cq->lock);
1245         spin_unlock_irq(&send_cq->lock);
1246
1247  err_out:
1248         dma_free_coherent(&dev->pdev->dev, sqp->header_buf_size,
1249                           sqp->header_buf, sqp->header_dma);
1250
1251         return err;
1252 }
1253
1254 void mthca_free_qp(struct mthca_dev *dev,
1255                    struct mthca_qp *qp)
1256 {
1257         u8 status;
1258         struct mthca_cq *send_cq;
1259         struct mthca_cq *recv_cq;
1260
1261         send_cq = to_mcq(qp->ibqp.send_cq);
1262         recv_cq = to_mcq(qp->ibqp.recv_cq);
1263
1264         /*
1265          * Lock CQs here, so that CQ polling code can do QP lookup
1266          * without taking a lock.
1267          */
1268         spin_lock_irq(&send_cq->lock);
1269         if (send_cq != recv_cq)
1270                 spin_lock(&recv_cq->lock);
1271
1272         spin_lock(&dev->qp_table.lock);
1273         mthca_array_clear(&dev->qp_table.qp,
1274                           qp->qpn & (dev->limits.num_qps - 1));
1275         spin_unlock(&dev->qp_table.lock);
1276
1277         if (send_cq != recv_cq)
1278                 spin_unlock(&recv_cq->lock);
1279         spin_unlock_irq(&send_cq->lock);
1280
1281         atomic_dec(&qp->refcount);
1282         wait_event(qp->wait, !atomic_read(&qp->refcount));
1283
1284         if (qp->state != IB_QPS_RESET)
1285                 mthca_MODIFY_QP(dev, MTHCA_TRANS_ANY2RST, qp->qpn, 0, NULL, 0, &status);
1286
1287         /*
1288          * If this is a userspace QP, the buffers, MR, CQs and so on
1289          * will be cleaned up in userspace, so all we have to do is
1290          * unref the mem-free tables and free the QPN in our table.
1291          */
1292         if (!qp->ibqp.uobject) {
1293                 mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq)->cqn, qp->qpn,
1294                                qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
1295                 if (qp->ibqp.send_cq != qp->ibqp.recv_cq)
1296                         mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq)->cqn, qp->qpn,
1297                                        qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
1298
1299                 mthca_free_memfree(dev, qp);
1300                 mthca_free_wqe_buf(dev, qp);
1301         }
1302
1303         mthca_unmap_memfree(dev, qp);
1304
1305         if (is_sqp(dev, qp)) {
1306                 atomic_dec(&(to_mpd(qp->ibqp.pd)->sqp_count));
1307                 dma_free_coherent(&dev->pdev->dev,
1308                                   to_msqp(qp)->header_buf_size,
1309                                   to_msqp(qp)->header_buf,
1310                                   to_msqp(qp)->header_dma);
1311         } else
1312                 mthca_free(&dev->qp_table.alloc, qp->qpn);
1313 }
1314
1315 /* Create UD header for an MLX send and build a data segment for it */
1316 static int build_mlx_header(struct mthca_dev *dev, struct mthca_sqp *sqp,
1317                             int ind, struct ib_send_wr *wr,
1318                             struct mthca_mlx_seg *mlx,
1319                             struct mthca_data_seg *data)
1320 {
1321         int header_size;
1322         int err;
1323         u16 pkey;
1324
1325         ib_ud_header_init(256, /* assume a MAD */
1326                           sqp->ud_header.grh_present,
1327                           &sqp->ud_header);
1328
1329         err = mthca_read_ah(dev, to_mah(wr->wr.ud.ah), &sqp->ud_header);
1330         if (err)
1331                 return err;
1332         mlx->flags &= ~cpu_to_be32(MTHCA_NEXT_SOLICIT | 1);
1333         mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MTHCA_MLX_VL15 : 0) |
1334                                   (sqp->ud_header.lrh.destination_lid ==
1335                                    IB_LID_PERMISSIVE ? MTHCA_MLX_SLR : 0) |
1336                                   (sqp->ud_header.lrh.service_level << 8));
1337         mlx->rlid = sqp->ud_header.lrh.destination_lid;
1338         mlx->vcrc = 0;
1339
1340         switch (wr->opcode) {
1341         case IB_WR_SEND:
1342                 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
1343                 sqp->ud_header.immediate_present = 0;
1344                 break;
1345         case IB_WR_SEND_WITH_IMM:
1346                 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
1347                 sqp->ud_header.immediate_present = 1;
1348                 sqp->ud_header.immediate_data = wr->imm_data;
1349                 break;
1350         default:
1351                 return -EINVAL;
1352         }
1353
1354         sqp->ud_header.lrh.virtual_lane    = !sqp->qp.ibqp.qp_num ? 15 : 0;
1355         if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
1356                 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
1357         sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
1358         if (!sqp->qp.ibqp.qp_num)
1359                 ib_get_cached_pkey(&dev->ib_dev, sqp->port,
1360                                    sqp->pkey_index, &pkey);
1361         else
1362                 ib_get_cached_pkey(&dev->ib_dev, sqp->port,
1363                                    wr->wr.ud.pkey_index, &pkey);
1364         sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
1365         sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
1366         sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
1367         sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
1368                                                sqp->qkey : wr->wr.ud.remote_qkey);
1369         sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
1370
1371         header_size = ib_ud_header_pack(&sqp->ud_header,
1372                                         sqp->header_buf +
1373                                         ind * MTHCA_UD_HEADER_SIZE);
1374
1375         data->byte_count = cpu_to_be32(header_size);
1376         data->lkey       = cpu_to_be32(to_mpd(sqp->qp.ibqp.pd)->ntmr.ibmr.lkey);
1377         data->addr       = cpu_to_be64(sqp->header_dma +
1378                                        ind * MTHCA_UD_HEADER_SIZE);
1379
1380         return 0;
1381 }
1382
1383 static inline int mthca_wq_overflow(struct mthca_wq *wq, int nreq,
1384                                     struct ib_cq *ib_cq)
1385 {
1386         unsigned cur;
1387         struct mthca_cq *cq;
1388
1389         cur = wq->head - wq->tail;
1390         if (likely(cur + nreq < wq->max))
1391                 return 0;
1392
1393         cq = to_mcq(ib_cq);
1394         spin_lock(&cq->lock);
1395         cur = wq->head - wq->tail;
1396         spin_unlock(&cq->lock);
1397
1398         return cur + nreq >= wq->max;
1399 }
1400
1401 int mthca_tavor_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
1402                           struct ib_send_wr **bad_wr)
1403 {
1404         struct mthca_dev *dev = to_mdev(ibqp->device);
1405         struct mthca_qp *qp = to_mqp(ibqp);
1406         void *wqe;
1407         void *prev_wqe;
1408         unsigned long flags;
1409         int err = 0;
1410         int nreq;
1411         int i;
1412         int size;
1413         int size0 = 0;
1414         u32 f0 = 0;
1415         int ind;
1416         u8 op0 = 0;
1417
1418         spin_lock_irqsave(&qp->sq.lock, flags);
1419
1420         /* XXX check that state is OK to post send */
1421
1422         ind = qp->sq.next_ind;
1423
1424         for (nreq = 0; wr; ++nreq, wr = wr->next) {
1425                 if (mthca_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
1426                         mthca_err(dev, "SQ %06x full (%u head, %u tail,"
1427                                         " %d max, %d nreq)\n", qp->qpn,
1428                                         qp->sq.head, qp->sq.tail,
1429                                         qp->sq.max, nreq);
1430                         err = -ENOMEM;
1431                         *bad_wr = wr;
1432                         goto out;
1433                 }
1434
1435                 wqe = get_send_wqe(qp, ind);
1436                 prev_wqe = qp->sq.last;
1437                 qp->sq.last = wqe;
1438
1439                 ((struct mthca_next_seg *) wqe)->nda_op = 0;
1440                 ((struct mthca_next_seg *) wqe)->ee_nds = 0;
1441                 ((struct mthca_next_seg *) wqe)->flags =
1442                         ((wr->send_flags & IB_SEND_SIGNALED) ?
1443                          cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) |
1444                         ((wr->send_flags & IB_SEND_SOLICITED) ?
1445                          cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0)   |
1446                         cpu_to_be32(1);
1447                 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
1448                     wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
1449                         ((struct mthca_next_seg *) wqe)->imm = wr->imm_data;
1450
1451                 wqe += sizeof (struct mthca_next_seg);
1452                 size = sizeof (struct mthca_next_seg) / 16;
1453
1454                 switch (qp->transport) {
1455                 case RC:
1456                         switch (wr->opcode) {
1457                         case IB_WR_ATOMIC_CMP_AND_SWP:
1458                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1459                                 ((struct mthca_raddr_seg *) wqe)->raddr =
1460                                         cpu_to_be64(wr->wr.atomic.remote_addr);
1461                                 ((struct mthca_raddr_seg *) wqe)->rkey =
1462                                         cpu_to_be32(wr->wr.atomic.rkey);
1463                                 ((struct mthca_raddr_seg *) wqe)->reserved = 0;
1464
1465                                 wqe += sizeof (struct mthca_raddr_seg);
1466
1467                                 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
1468                                         ((struct mthca_atomic_seg *) wqe)->swap_add =
1469                                                 cpu_to_be64(wr->wr.atomic.swap);
1470                                         ((struct mthca_atomic_seg *) wqe)->compare =
1471                                                 cpu_to_be64(wr->wr.atomic.compare_add);
1472                                 } else {
1473                                         ((struct mthca_atomic_seg *) wqe)->swap_add =
1474                                                 cpu_to_be64(wr->wr.atomic.compare_add);
1475                                         ((struct mthca_atomic_seg *) wqe)->compare = 0;
1476                                 }
1477
1478                                 wqe += sizeof (struct mthca_atomic_seg);
1479                                 size += sizeof (struct mthca_raddr_seg) / 16 +
1480                                         sizeof (struct mthca_atomic_seg);
1481                                 break;
1482
1483                         case IB_WR_RDMA_WRITE:
1484                         case IB_WR_RDMA_WRITE_WITH_IMM:
1485                         case IB_WR_RDMA_READ:
1486                                 ((struct mthca_raddr_seg *) wqe)->raddr =
1487                                         cpu_to_be64(wr->wr.rdma.remote_addr);
1488                                 ((struct mthca_raddr_seg *) wqe)->rkey =
1489                                         cpu_to_be32(wr->wr.rdma.rkey);
1490                                 ((struct mthca_raddr_seg *) wqe)->reserved = 0;
1491                                 wqe += sizeof (struct mthca_raddr_seg);
1492                                 size += sizeof (struct mthca_raddr_seg) / 16;
1493                                 break;
1494
1495                         default:
1496                                 /* No extra segments required for sends */
1497                                 break;
1498                         }
1499
1500                         break;
1501
1502                 case UC:
1503                         switch (wr->opcode) {
1504                         case IB_WR_RDMA_WRITE:
1505                         case IB_WR_RDMA_WRITE_WITH_IMM:
1506                                 ((struct mthca_raddr_seg *) wqe)->raddr =
1507                                         cpu_to_be64(wr->wr.rdma.remote_addr);
1508                                 ((struct mthca_raddr_seg *) wqe)->rkey =
1509                                         cpu_to_be32(wr->wr.rdma.rkey);
1510                                 ((struct mthca_raddr_seg *) wqe)->reserved = 0;
1511                                 wqe += sizeof (struct mthca_raddr_seg);
1512                                 size += sizeof (struct mthca_raddr_seg) / 16;
1513                                 break;
1514
1515                         default:
1516                                 /* No extra segments required for sends */
1517                                 break;
1518                         }
1519
1520                         break;
1521
1522                 case UD:
1523                         ((struct mthca_tavor_ud_seg *) wqe)->lkey =
1524                                 cpu_to_be32(to_mah(wr->wr.ud.ah)->key);
1525                         ((struct mthca_tavor_ud_seg *) wqe)->av_addr =
1526                                 cpu_to_be64(to_mah(wr->wr.ud.ah)->avdma);
1527                         ((struct mthca_tavor_ud_seg *) wqe)->dqpn =
1528                                 cpu_to_be32(wr->wr.ud.remote_qpn);
1529                         ((struct mthca_tavor_ud_seg *) wqe)->qkey =
1530                                 cpu_to_be32(wr->wr.ud.remote_qkey);
1531
1532                         wqe += sizeof (struct mthca_tavor_ud_seg);
1533                         size += sizeof (struct mthca_tavor_ud_seg) / 16;
1534                         break;
1535
1536                 case MLX:
1537                         err = build_mlx_header(dev, to_msqp(qp), ind, wr,
1538                                                wqe - sizeof (struct mthca_next_seg),
1539                                                wqe);
1540                         if (err) {
1541                                 *bad_wr = wr;
1542                                 goto out;
1543                         }
1544                         wqe += sizeof (struct mthca_data_seg);
1545                         size += sizeof (struct mthca_data_seg) / 16;
1546                         break;
1547                 }
1548
1549                 if (wr->num_sge > qp->sq.max_gs) {
1550                         mthca_err(dev, "too many gathers\n");
1551                         err = -EINVAL;
1552                         *bad_wr = wr;
1553                         goto out;
1554                 }
1555
1556                 for (i = 0; i < wr->num_sge; ++i) {
1557                         ((struct mthca_data_seg *) wqe)->byte_count =
1558                                 cpu_to_be32(wr->sg_list[i].length);
1559                         ((struct mthca_data_seg *) wqe)->lkey =
1560                                 cpu_to_be32(wr->sg_list[i].lkey);
1561                         ((struct mthca_data_seg *) wqe)->addr =
1562                                 cpu_to_be64(wr->sg_list[i].addr);
1563                         wqe += sizeof (struct mthca_data_seg);
1564                         size += sizeof (struct mthca_data_seg) / 16;
1565                 }
1566
1567                 /* Add one more inline data segment for ICRC */
1568                 if (qp->transport == MLX) {
1569                         ((struct mthca_data_seg *) wqe)->byte_count =
1570                                 cpu_to_be32((1 << 31) | 4);
1571                         ((u32 *) wqe)[1] = 0;
1572                         wqe += sizeof (struct mthca_data_seg);
1573                         size += sizeof (struct mthca_data_seg) / 16;
1574                 }
1575
1576                 qp->wrid[ind + qp->rq.max] = wr->wr_id;
1577
1578                 if (wr->opcode >= ARRAY_SIZE(mthca_opcode)) {
1579                         mthca_err(dev, "opcode invalid\n");
1580                         err = -EINVAL;
1581                         *bad_wr = wr;
1582                         goto out;
1583                 }
1584
1585                 if (prev_wqe) {
1586                         ((struct mthca_next_seg *) prev_wqe)->nda_op =
1587                                 cpu_to_be32(((ind << qp->sq.wqe_shift) +
1588                                              qp->send_wqe_offset) |
1589                                             mthca_opcode[wr->opcode]);
1590                         wmb();
1591                         ((struct mthca_next_seg *) prev_wqe)->ee_nds =
1592                                 cpu_to_be32((size0 ? 0 : MTHCA_NEXT_DBD) | size);
1593                 }
1594
1595                 if (!size0) {
1596                         size0 = size;
1597                         op0   = mthca_opcode[wr->opcode];
1598                 }
1599
1600                 ++ind;
1601                 if (unlikely(ind >= qp->sq.max))
1602                         ind -= qp->sq.max;
1603         }
1604
1605 out:
1606         if (likely(nreq)) {
1607                 __be32 doorbell[2];
1608
1609                 doorbell[0] = cpu_to_be32(((qp->sq.next_ind << qp->sq.wqe_shift) +
1610                                            qp->send_wqe_offset) | f0 | op0);
1611                 doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0);
1612
1613                 wmb();
1614
1615                 mthca_write64(doorbell,
1616                               dev->kar + MTHCA_SEND_DOORBELL,
1617                               MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
1618         }
1619
1620         qp->sq.next_ind = ind;
1621         qp->sq.head    += nreq;
1622
1623         spin_unlock_irqrestore(&qp->sq.lock, flags);
1624         return err;
1625 }
1626
1627 int mthca_tavor_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
1628                              struct ib_recv_wr **bad_wr)
1629 {
1630         struct mthca_dev *dev = to_mdev(ibqp->device);
1631         struct mthca_qp *qp = to_mqp(ibqp);
1632         unsigned long flags;
1633         int err = 0;
1634         int nreq;
1635         int i;
1636         int size;
1637         int size0 = 0;
1638         int ind;
1639         void *wqe;
1640         void *prev_wqe;
1641
1642         spin_lock_irqsave(&qp->rq.lock, flags);
1643
1644         /* XXX check that state is OK to post receive */
1645
1646         ind = qp->rq.next_ind;
1647
1648         for (nreq = 0; wr; ++nreq, wr = wr->next) {
1649                 if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
1650                         mthca_err(dev, "RQ %06x full (%u head, %u tail,"
1651                                         " %d max, %d nreq)\n", qp->qpn,
1652                                         qp->rq.head, qp->rq.tail,
1653                                         qp->rq.max, nreq);
1654                         err = -ENOMEM;
1655                         *bad_wr = wr;
1656                         goto out;
1657                 }
1658
1659                 wqe = get_recv_wqe(qp, ind);
1660                 prev_wqe = qp->rq.last;
1661                 qp->rq.last = wqe;
1662
1663                 ((struct mthca_next_seg *) wqe)->nda_op = 0;
1664                 ((struct mthca_next_seg *) wqe)->ee_nds =
1665                         cpu_to_be32(MTHCA_NEXT_DBD);
1666                 ((struct mthca_next_seg *) wqe)->flags = 0;
1667
1668                 wqe += sizeof (struct mthca_next_seg);
1669                 size = sizeof (struct mthca_next_seg) / 16;
1670
1671                 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
1672                         err = -EINVAL;
1673                         *bad_wr = wr;
1674                         goto out;
1675                 }
1676
1677                 for (i = 0; i < wr->num_sge; ++i) {
1678                         ((struct mthca_data_seg *) wqe)->byte_count =
1679                                 cpu_to_be32(wr->sg_list[i].length);
1680                         ((struct mthca_data_seg *) wqe)->lkey =
1681                                 cpu_to_be32(wr->sg_list[i].lkey);
1682                         ((struct mthca_data_seg *) wqe)->addr =
1683                                 cpu_to_be64(wr->sg_list[i].addr);
1684                         wqe += sizeof (struct mthca_data_seg);
1685                         size += sizeof (struct mthca_data_seg) / 16;
1686                 }
1687
1688                 qp->wrid[ind] = wr->wr_id;
1689
1690                 if (likely(prev_wqe)) {
1691                         ((struct mthca_next_seg *) prev_wqe)->nda_op =
1692                                 cpu_to_be32((ind << qp->rq.wqe_shift) | 1);
1693                         wmb();
1694                         ((struct mthca_next_seg *) prev_wqe)->ee_nds =
1695                                 cpu_to_be32(MTHCA_NEXT_DBD | size);
1696                 }
1697
1698                 if (!size0)
1699                         size0 = size;
1700
1701                 ++ind;
1702                 if (unlikely(ind >= qp->rq.max))
1703                         ind -= qp->rq.max;
1704         }
1705
1706 out:
1707         if (likely(nreq)) {
1708                 __be32 doorbell[2];
1709
1710                 doorbell[0] = cpu_to_be32((qp->rq.next_ind << qp->rq.wqe_shift) | size0);
1711                 doorbell[1] = cpu_to_be32((qp->qpn << 8) | nreq);
1712
1713                 wmb();
1714
1715                 mthca_write64(doorbell,
1716                               dev->kar + MTHCA_RECEIVE_DOORBELL,
1717                               MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
1718         }
1719
1720         qp->rq.next_ind = ind;
1721         qp->rq.head    += nreq;
1722
1723         spin_unlock_irqrestore(&qp->rq.lock, flags);
1724         return err;
1725 }
1726
1727 int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
1728                           struct ib_send_wr **bad_wr)
1729 {
1730         struct mthca_dev *dev = to_mdev(ibqp->device);
1731         struct mthca_qp *qp = to_mqp(ibqp);
1732         void *wqe;
1733         void *prev_wqe;
1734         unsigned long flags;
1735         int err = 0;
1736         int nreq;
1737         int i;
1738         int size;
1739         int size0 = 0;
1740         u32 f0 = 0;
1741         int ind;
1742         u8 op0 = 0;
1743
1744         spin_lock_irqsave(&qp->sq.lock, flags);
1745
1746         /* XXX check that state is OK to post send */
1747
1748         ind = qp->sq.head & (qp->sq.max - 1);
1749
1750         for (nreq = 0; wr; ++nreq, wr = wr->next) {
1751                 if (mthca_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
1752                         mthca_err(dev, "SQ %06x full (%u head, %u tail,"
1753                                         " %d max, %d nreq)\n", qp->qpn,
1754                                         qp->sq.head, qp->sq.tail,
1755                                         qp->sq.max, nreq);
1756                         err = -ENOMEM;
1757                         *bad_wr = wr;
1758                         goto out;
1759                 }
1760
1761                 wqe = get_send_wqe(qp, ind);
1762                 prev_wqe = qp->sq.last;
1763                 qp->sq.last = wqe;
1764
1765                 ((struct mthca_next_seg *) wqe)->flags =
1766                         ((wr->send_flags & IB_SEND_SIGNALED) ?
1767                          cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) |
1768                         ((wr->send_flags & IB_SEND_SOLICITED) ?
1769                          cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0)   |
1770                         cpu_to_be32(1);
1771                 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
1772                     wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
1773                         ((struct mthca_next_seg *) wqe)->imm = wr->imm_data;
1774
1775                 wqe += sizeof (struct mthca_next_seg);
1776                 size = sizeof (struct mthca_next_seg) / 16;
1777
1778                 switch (qp->transport) {
1779                 case RC:
1780                         switch (wr->opcode) {
1781                         case IB_WR_ATOMIC_CMP_AND_SWP:
1782                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1783                                 ((struct mthca_raddr_seg *) wqe)->raddr =
1784                                         cpu_to_be64(wr->wr.atomic.remote_addr);
1785                                 ((struct mthca_raddr_seg *) wqe)->rkey =
1786                                         cpu_to_be32(wr->wr.atomic.rkey);
1787                                 ((struct mthca_raddr_seg *) wqe)->reserved = 0;
1788
1789                                 wqe += sizeof (struct mthca_raddr_seg);
1790
1791                                 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
1792                                         ((struct mthca_atomic_seg *) wqe)->swap_add =
1793                                                 cpu_to_be64(wr->wr.atomic.swap);
1794                                         ((struct mthca_atomic_seg *) wqe)->compare =
1795                                                 cpu_to_be64(wr->wr.atomic.compare_add);
1796                                 } else {
1797                                         ((struct mthca_atomic_seg *) wqe)->swap_add =
1798                                                 cpu_to_be64(wr->wr.atomic.compare_add);
1799                                         ((struct mthca_atomic_seg *) wqe)->compare = 0;
1800                                 }
1801
1802                                 wqe += sizeof (struct mthca_atomic_seg);
1803                                 size += sizeof (struct mthca_raddr_seg) / 16 +
1804                                         sizeof (struct mthca_atomic_seg);
1805                                 break;
1806
1807                         case IB_WR_RDMA_READ:
1808                         case IB_WR_RDMA_WRITE:
1809                         case IB_WR_RDMA_WRITE_WITH_IMM:
1810                                 ((struct mthca_raddr_seg *) wqe)->raddr =
1811                                         cpu_to_be64(wr->wr.rdma.remote_addr);
1812                                 ((struct mthca_raddr_seg *) wqe)->rkey =
1813                                         cpu_to_be32(wr->wr.rdma.rkey);
1814                                 ((struct mthca_raddr_seg *) wqe)->reserved = 0;
1815                                 wqe += sizeof (struct mthca_raddr_seg);
1816                                 size += sizeof (struct mthca_raddr_seg) / 16;
1817                                 break;
1818
1819                         default:
1820                                 /* No extra segments required for sends */
1821                                 break;
1822                         }
1823
1824                         break;
1825
1826                 case UC:
1827                         switch (wr->opcode) {
1828                         case IB_WR_RDMA_WRITE:
1829                         case IB_WR_RDMA_WRITE_WITH_IMM:
1830                                 ((struct mthca_raddr_seg *) wqe)->raddr =
1831                                         cpu_to_be64(wr->wr.rdma.remote_addr);
1832                                 ((struct mthca_raddr_seg *) wqe)->rkey =
1833                                         cpu_to_be32(wr->wr.rdma.rkey);
1834                                 ((struct mthca_raddr_seg *) wqe)->reserved = 0;
1835                                 wqe += sizeof (struct mthca_raddr_seg);
1836                                 size += sizeof (struct mthca_raddr_seg) / 16;
1837                                 break;
1838
1839                         default:
1840                                 /* No extra segments required for sends */
1841                                 break;
1842                         }
1843
1844                         break;
1845
1846                 case UD:
1847                         memcpy(((struct mthca_arbel_ud_seg *) wqe)->av,
1848                                to_mah(wr->wr.ud.ah)->av, MTHCA_AV_SIZE);
1849                         ((struct mthca_arbel_ud_seg *) wqe)->dqpn =
1850                                 cpu_to_be32(wr->wr.ud.remote_qpn);
1851                         ((struct mthca_arbel_ud_seg *) wqe)->qkey =
1852                                 cpu_to_be32(wr->wr.ud.remote_qkey);
1853
1854                         wqe += sizeof (struct mthca_arbel_ud_seg);
1855                         size += sizeof (struct mthca_arbel_ud_seg) / 16;
1856                         break;
1857
1858                 case MLX:
1859                         err = build_mlx_header(dev, to_msqp(qp), ind, wr,
1860                                                wqe - sizeof (struct mthca_next_seg),
1861                                                wqe);
1862                         if (err) {
1863                                 *bad_wr = wr;
1864                                 goto out;
1865                         }
1866                         wqe += sizeof (struct mthca_data_seg);
1867                         size += sizeof (struct mthca_data_seg) / 16;
1868                         break;
1869                 }
1870
1871                 if (wr->num_sge > qp->sq.max_gs) {
1872                         mthca_err(dev, "too many gathers\n");
1873                         err = -EINVAL;
1874                         *bad_wr = wr;
1875                         goto out;
1876                 }
1877
1878                 for (i = 0; i < wr->num_sge; ++i) {
1879                         ((struct mthca_data_seg *) wqe)->byte_count =
1880                                 cpu_to_be32(wr->sg_list[i].length);
1881                         ((struct mthca_data_seg *) wqe)->lkey =
1882                                 cpu_to_be32(wr->sg_list[i].lkey);
1883                         ((struct mthca_data_seg *) wqe)->addr =
1884                                 cpu_to_be64(wr->sg_list[i].addr);
1885                         wqe += sizeof (struct mthca_data_seg);
1886                         size += sizeof (struct mthca_data_seg) / 16;
1887                 }
1888
1889                 /* Add one more inline data segment for ICRC */
1890                 if (qp->transport == MLX) {
1891                         ((struct mthca_data_seg *) wqe)->byte_count =
1892                                 cpu_to_be32((1 << 31) | 4);
1893                         ((u32 *) wqe)[1] = 0;
1894                         wqe += sizeof (struct mthca_data_seg);
1895                         size += sizeof (struct mthca_data_seg) / 16;
1896                 }
1897
1898                 qp->wrid[ind + qp->rq.max] = wr->wr_id;
1899
1900                 if (wr->opcode >= ARRAY_SIZE(mthca_opcode)) {
1901                         mthca_err(dev, "opcode invalid\n");
1902                         err = -EINVAL;
1903                         *bad_wr = wr;
1904                         goto out;
1905                 }
1906
1907                 if (likely(prev_wqe)) {
1908                         ((struct mthca_next_seg *) prev_wqe)->nda_op =
1909                                 cpu_to_be32(((ind << qp->sq.wqe_shift) +
1910                                              qp->send_wqe_offset) |
1911                                             mthca_opcode[wr->opcode]);
1912                         wmb();
1913                         ((struct mthca_next_seg *) prev_wqe)->ee_nds =
1914                                 cpu_to_be32(MTHCA_NEXT_DBD | size);
1915                 }
1916
1917                 if (!size0) {
1918                         size0 = size;
1919                         op0   = mthca_opcode[wr->opcode];
1920                 }
1921
1922                 ++ind;
1923                 if (unlikely(ind >= qp->sq.max))
1924                         ind -= qp->sq.max;
1925         }
1926
1927 out:
1928         if (likely(nreq)) {
1929                 __be32 doorbell[2];
1930
1931                 doorbell[0] = cpu_to_be32((nreq << 24)                  |
1932                                           ((qp->sq.head & 0xffff) << 8) |
1933                                           f0 | op0);
1934                 doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0);
1935
1936                 qp->sq.head += nreq;
1937
1938                 /*
1939                  * Make sure that descriptors are written before
1940                  * doorbell record.
1941                  */
1942                 wmb();
1943                 *qp->sq.db = cpu_to_be32(qp->sq.head & 0xffff);
1944
1945                 /*
1946                  * Make sure doorbell record is written before we
1947                  * write MMIO send doorbell.
1948                  */
1949                 wmb();
1950                 mthca_write64(doorbell,
1951                               dev->kar + MTHCA_SEND_DOORBELL,
1952                               MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
1953         }
1954
1955         spin_unlock_irqrestore(&qp->sq.lock, flags);
1956         return err;
1957 }
1958
1959 int mthca_arbel_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
1960                              struct ib_recv_wr **bad_wr)
1961 {
1962         struct mthca_dev *dev = to_mdev(ibqp->device);
1963         struct mthca_qp *qp = to_mqp(ibqp);
1964         unsigned long flags;
1965         int err = 0;
1966         int nreq;
1967         int ind;
1968         int i;
1969         void *wqe;
1970
1971         spin_lock_irqsave(&qp->rq.lock, flags);
1972
1973         /* XXX check that state is OK to post receive */
1974
1975         ind = qp->rq.head & (qp->rq.max - 1);
1976
1977         for (nreq = 0; wr; ++nreq, wr = wr->next) {
1978                 if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
1979                         mthca_err(dev, "RQ %06x full (%u head, %u tail,"
1980                                         " %d max, %d nreq)\n", qp->qpn,
1981                                         qp->rq.head, qp->rq.tail,
1982                                         qp->rq.max, nreq);
1983                         err = -ENOMEM;
1984                         *bad_wr = wr;
1985                         goto out;
1986                 }
1987
1988                 wqe = get_recv_wqe(qp, ind);
1989
1990                 ((struct mthca_next_seg *) wqe)->flags = 0;
1991
1992                 wqe += sizeof (struct mthca_next_seg);
1993
1994                 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
1995                         err = -EINVAL;
1996                         *bad_wr = wr;
1997                         goto out;
1998                 }
1999
2000                 for (i = 0; i < wr->num_sge; ++i) {
2001                         ((struct mthca_data_seg *) wqe)->byte_count =
2002                                 cpu_to_be32(wr->sg_list[i].length);
2003                         ((struct mthca_data_seg *) wqe)->lkey =
2004                                 cpu_to_be32(wr->sg_list[i].lkey);
2005                         ((struct mthca_data_seg *) wqe)->addr =
2006                                 cpu_to_be64(wr->sg_list[i].addr);
2007                         wqe += sizeof (struct mthca_data_seg);
2008                 }
2009
2010                 if (i < qp->rq.max_gs) {
2011                         ((struct mthca_data_seg *) wqe)->byte_count = 0;
2012                         ((struct mthca_data_seg *) wqe)->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
2013                         ((struct mthca_data_seg *) wqe)->addr = 0;
2014                 }
2015
2016                 qp->wrid[ind] = wr->wr_id;
2017
2018                 ++ind;
2019                 if (unlikely(ind >= qp->rq.max))
2020                         ind -= qp->rq.max;
2021         }
2022 out:
2023         if (likely(nreq)) {
2024                 qp->rq.head += nreq;
2025
2026                 /*
2027                  * Make sure that descriptors are written before
2028                  * doorbell record.
2029                  */
2030                 wmb();
2031                 *qp->rq.db = cpu_to_be32(qp->rq.head & 0xffff);
2032         }
2033
2034         spin_unlock_irqrestore(&qp->rq.lock, flags);
2035         return err;
2036 }
2037
2038 int mthca_free_err_wqe(struct mthca_dev *dev, struct mthca_qp *qp, int is_send,
2039                        int index, int *dbd, __be32 *new_wqe)
2040 {
2041         struct mthca_next_seg *next;
2042
2043         /*
2044          * For SRQs, all WQEs generate a CQE, so we're always at the
2045          * end of the doorbell chain.
2046          */
2047         if (qp->ibqp.srq) {
2048                 *new_wqe = 0;
2049                 return 0;
2050         }
2051
2052         if (is_send)
2053                 next = get_send_wqe(qp, index);
2054         else
2055                 next = get_recv_wqe(qp, index);
2056
2057         *dbd = !!(next->ee_nds & cpu_to_be32(MTHCA_NEXT_DBD));
2058         if (next->ee_nds & cpu_to_be32(0x3f))
2059                 *new_wqe = (next->nda_op & cpu_to_be32(~0x3f)) |
2060                         (next->ee_nds & cpu_to_be32(0x3f));
2061         else
2062                 *new_wqe = 0;
2063
2064         return 0;
2065 }
2066
2067 int __devinit mthca_init_qp_table(struct mthca_dev *dev)
2068 {
2069         int err;
2070         u8 status;
2071         int i;
2072
2073         spin_lock_init(&dev->qp_table.lock);
2074
2075         /*
2076          * We reserve 2 extra QPs per port for the special QPs.  The
2077          * special QP for port 1 has to be even, so round up.
2078          */
2079         dev->qp_table.sqp_start = (dev->limits.reserved_qps + 1) & ~1UL;
2080         err = mthca_alloc_init(&dev->qp_table.alloc,
2081                                dev->limits.num_qps,
2082                                (1 << 24) - 1,
2083                                dev->qp_table.sqp_start +
2084                                MTHCA_MAX_PORTS * 2);
2085         if (err)
2086                 return err;
2087
2088         err = mthca_array_init(&dev->qp_table.qp,
2089                                dev->limits.num_qps);
2090         if (err) {
2091                 mthca_alloc_cleanup(&dev->qp_table.alloc);
2092                 return err;
2093         }
2094
2095         for (i = 0; i < 2; ++i) {
2096                 err = mthca_CONF_SPECIAL_QP(dev, i ? IB_QPT_GSI : IB_QPT_SMI,
2097                                             dev->qp_table.sqp_start + i * 2,
2098                                             &status);
2099                 if (err)
2100                         goto err_out;
2101                 if (status) {
2102                         mthca_warn(dev, "CONF_SPECIAL_QP returned "
2103                                    "status %02x, aborting.\n",
2104                                    status);
2105                         err = -EINVAL;
2106                         goto err_out;
2107                 }
2108         }
2109         return 0;
2110
2111  err_out:
2112         for (i = 0; i < 2; ++i)
2113                 mthca_CONF_SPECIAL_QP(dev, i, 0, &status);
2114
2115         mthca_array_cleanup(&dev->qp_table.qp, dev->limits.num_qps);
2116         mthca_alloc_cleanup(&dev->qp_table.alloc);
2117
2118         return err;
2119 }
2120
2121 void __devexit mthca_cleanup_qp_table(struct mthca_dev *dev)
2122 {
2123         int i;
2124         u8 status;
2125
2126         for (i = 0; i < 2; ++i)
2127                 mthca_CONF_SPECIAL_QP(dev, i, 0, &status);
2128
2129         mthca_alloc_cleanup(&dev->qp_table.alloc);
2130 }