git.oblomov.eu Git - linux-2.6/blob - drivers/infiniband/hw/cxgb3/iwch_qp.c

   1 /*
   2  * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32 #include "iwch_provider.h"
  33 #include "iwch.h"
  34 #include "iwch_cm.h"
  35 #include "cxio_hal.h"
  36
  37 #define NO_SUPPORT -1
  38
  39 static int iwch_build_rdma_send(union t3_wr *wqe, struct ib_send_wr *wr,
  40                                 u8 * flit_cnt)
  41 {
  42         int i;
  43         u32 plen;
  44
  45         switch (wr->opcode) {
  46         case IB_WR_SEND:
  47         case IB_WR_SEND_WITH_IMM:
  48                 if (wr->send_flags & IB_SEND_SOLICITED)
  49                         wqe->send.rdmaop = T3_SEND_WITH_SE;
  50                 else
  51                         wqe->send.rdmaop = T3_SEND;
  52                 wqe->send.rem_stag = 0;
  53                 break;
  54 #if 0                           /* Not currently supported */
  55         case TYPE_SEND_INVALIDATE:
  56         case TYPE_SEND_INVALIDATE_IMMEDIATE:
  57                 wqe->send.rdmaop = T3_SEND_WITH_INV;
  58                 wqe->send.rem_stag = cpu_to_be32(wr->wr.rdma.rkey);
  59                 break;
  60         case TYPE_SEND_SE_INVALIDATE:
  61                 wqe->send.rdmaop = T3_SEND_WITH_SE_INV;
  62                 wqe->send.rem_stag = cpu_to_be32(wr->wr.rdma.rkey);
  63                 break;
  64 #endif
  65         default:
  66                 break;
  67         }
  68         if (wr->num_sge > T3_MAX_SGE)
  69                 return -EINVAL;
  70         wqe->send.reserved[0] = 0;
  71         wqe->send.reserved[1] = 0;
  72         wqe->send.reserved[2] = 0;
  73         if (wr->opcode == IB_WR_SEND_WITH_IMM) {
  74                 plen = 4;
  75                 wqe->send.sgl[0].stag = wr->ex.imm_data;
  76                 wqe->send.sgl[0].len = __constant_cpu_to_be32(0);
  77                 wqe->send.num_sgle = __constant_cpu_to_be32(0);
  78                 *flit_cnt = 5;
  79         } else {
  80                 plen = 0;
  81                 for (i = 0; i < wr->num_sge; i++) {
  82                         if ((plen + wr->sg_list[i].length) < plen) {
  83                                 return -EMSGSIZE;
  84                         }
  85                         plen += wr->sg_list[i].length;
  86                         wqe->send.sgl[i].stag =
  87                             cpu_to_be32(wr->sg_list[i].lkey);
  88                         wqe->send.sgl[i].len =
  89                             cpu_to_be32(wr->sg_list[i].length);
  90                         wqe->send.sgl[i].to = cpu_to_be64(wr->sg_list[i].addr);
  91                 }
  92                 wqe->send.num_sgle = cpu_to_be32(wr->num_sge);
  93                 *flit_cnt = 4 + ((wr->num_sge) << 1);
  94         }
  95         wqe->send.plen = cpu_to_be32(plen);
  96         return 0;
  97 }
  98
  99 static int iwch_build_rdma_write(union t3_wr *wqe, struct ib_send_wr *wr,
 100                                  u8 *flit_cnt)
 101 {
 102         int i;
 103         u32 plen;
 104         if (wr->num_sge > T3_MAX_SGE)
 105                 return -EINVAL;
 106         wqe->write.rdmaop = T3_RDMA_WRITE;
 107         wqe->write.reserved[0] = 0;
 108         wqe->write.reserved[1] = 0;
 109         wqe->write.reserved[2] = 0;
 110         wqe->write.stag_sink = cpu_to_be32(wr->wr.rdma.rkey);
 111         wqe->write.to_sink = cpu_to_be64(wr->wr.rdma.remote_addr);
 112
 113         if (wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
 114                 plen = 4;
 115                 wqe->write.sgl[0].stag = wr->ex.imm_data;
 116                 wqe->write.sgl[0].len = __constant_cpu_to_be32(0);
 117                 wqe->write.num_sgle = __constant_cpu_to_be32(0);
 118                 *flit_cnt = 6;
 119         } else {
 120                 plen = 0;
 121                 for (i = 0; i < wr->num_sge; i++) {
 122                         if ((plen + wr->sg_list[i].length) < plen) {
 123                                 return -EMSGSIZE;
 124                         }
 125                         plen += wr->sg_list[i].length;
 126                         wqe->write.sgl[i].stag =
 127                             cpu_to_be32(wr->sg_list[i].lkey);
 128                         wqe->write.sgl[i].len =
 129                             cpu_to_be32(wr->sg_list[i].length);
 130                         wqe->write.sgl[i].to =
 131                             cpu_to_be64(wr->sg_list[i].addr);
 132                 }
 133                 wqe->write.num_sgle = cpu_to_be32(wr->num_sge);
 134                 *flit_cnt = 5 + ((wr->num_sge) << 1);
 135         }
 136         wqe->write.plen = cpu_to_be32(plen);
 137         return 0;
 138 }
 139
 140 static int iwch_build_rdma_read(union t3_wr *wqe, struct ib_send_wr *wr,
 141                                 u8 *flit_cnt)
 142 {
 143         if (wr->num_sge > 1)
 144                 return -EINVAL;
 145         wqe->read.rdmaop = T3_READ_REQ;
 146         wqe->read.reserved[0] = 0;
 147         wqe->read.reserved[1] = 0;
 148         wqe->read.reserved[2] = 0;
 149         wqe->read.rem_stag = cpu_to_be32(wr->wr.rdma.rkey);
 150         wqe->read.rem_to = cpu_to_be64(wr->wr.rdma.remote_addr);
 151         wqe->read.local_stag = cpu_to_be32(wr->sg_list[0].lkey);
 152         wqe->read.local_len = cpu_to_be32(wr->sg_list[0].length);
 153         wqe->read.local_to = cpu_to_be64(wr->sg_list[0].addr);
 154         *flit_cnt = sizeof(struct t3_rdma_read_wr) >> 3;
 155         return 0;
 156 }
 157
 158 /*
 159  * TBD: this is going to be moved to firmware. Missing pdid/qpid check for now.
 160  */
 161 static int iwch_sgl2pbl_map(struct iwch_dev *rhp, struct ib_sge *sg_list,
 162                             u32 num_sgle, u32 * pbl_addr, u8 * page_size)
 163 {
 164         int i;
 165         struct iwch_mr *mhp;
 166         u32 offset;
 167         for (i = 0; i < num_sgle; i++) {
 168
 169                 mhp = get_mhp(rhp, (sg_list[i].lkey) >> 8);
 170                 if (!mhp) {
 171                         PDBG("%s %d\n", __func__, __LINE__);
 172                         return -EIO;
 173                 }
 174                 if (!mhp->attr.state) {
 175                         PDBG("%s %d\n", __func__, __LINE__);
 176                         return -EIO;
 177                 }
 178                 if (mhp->attr.zbva) {
 179                         PDBG("%s %d\n", __func__, __LINE__);
 180                         return -EIO;
 181                 }
 182
 183                 if (sg_list[i].addr < mhp->attr.va_fbo) {
 184                         PDBG("%s %d\n", __func__, __LINE__);
 185                         return -EINVAL;
 186                 }
 187                 if (sg_list[i].addr + ((u64) sg_list[i].length) <
 188                     sg_list[i].addr) {
 189                         PDBG("%s %d\n", __func__, __LINE__);
 190                         return -EINVAL;
 191                 }
 192                 if (sg_list[i].addr + ((u64) sg_list[i].length) >
 193                     mhp->attr.va_fbo + ((u64) mhp->attr.len)) {
 194                         PDBG("%s %d\n", __func__, __LINE__);
 195                         return -EINVAL;
 196                 }
 197                 offset = sg_list[i].addr - mhp->attr.va_fbo;
 198                 offset += ((u32) mhp->attr.va_fbo) %
 199                           (1UL << (12 + mhp->attr.page_size));
 200                 pbl_addr[i] = ((mhp->attr.pbl_addr -
 201                                 rhp->rdev.rnic_info.pbl_base) >> 3) +
 202                               (offset >> (12 + mhp->attr.page_size));
 203                 page_size[i] = mhp->attr.page_size;
 204         }
 205         return 0;
 206 }
 207
 208 static int iwch_build_rdma_recv(struct iwch_dev *rhp, union t3_wr *wqe,
 209                                 struct ib_recv_wr *wr)
 210 {
 211         int i;
 212         if (wr->num_sge > T3_MAX_SGE)
 213                 return -EINVAL;
 214         wqe->recv.num_sgle = cpu_to_be32(wr->num_sge);
 215         for (i = 0; i < wr->num_sge; i++) {
 216                 wqe->recv.sgl[i].stag = cpu_to_be32(wr->sg_list[i].lkey);
 217                 wqe->recv.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
 218                 wqe->recv.sgl[i].to = cpu_to_be64(wr->sg_list[i].addr);
 219         }
 220         for (; i < T3_MAX_SGE; i++) {
 221                 wqe->recv.sgl[i].stag = 0;
 222                 wqe->recv.sgl[i].len = 0;
 223                 wqe->recv.sgl[i].to = 0;
 224         }
 225         return 0;
 226 }
 227
 228 int iwch_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 229                       struct ib_send_wr **bad_wr)
 230 {
 231         int err = 0;
 232         u8 uninitialized_var(t3_wr_flit_cnt);
 233         enum t3_wr_opcode t3_wr_opcode = 0;
 234         enum t3_wr_flags t3_wr_flags;
 235         struct iwch_qp *qhp;
 236         u32 idx;
 237         union t3_wr *wqe;
 238         u32 num_wrs;
 239         unsigned long flag;
 240         struct t3_swsq *sqp;
 241
 242         qhp = to_iwch_qp(ibqp);
 243         spin_lock_irqsave(&qhp->lock, flag);
 244         if (qhp->attr.state > IWCH_QP_STATE_RTS) {
 245                 spin_unlock_irqrestore(&qhp->lock, flag);
 246                 return -EINVAL;
 247         }
 248         num_wrs = Q_FREECNT(qhp->wq.sq_rptr, qhp->wq.sq_wptr,
 249                   qhp->wq.sq_size_log2);
 250         if (num_wrs <= 0) {
 251                 spin_unlock_irqrestore(&qhp->lock, flag);
 252                 return -ENOMEM;
 253         }
 254         while (wr) {
 255                 if (num_wrs == 0) {
 256                         err = -ENOMEM;
 257                         *bad_wr = wr;
 258                         break;
 259                 }
 260                 idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
 261                 wqe = (union t3_wr *) (qhp->wq.queue + idx);
 262                 t3_wr_flags = 0;
 263                 if (wr->send_flags & IB_SEND_SOLICITED)
 264                         t3_wr_flags |= T3_SOLICITED_EVENT_FLAG;
 265                 if (wr->send_flags & IB_SEND_FENCE)
 266                         t3_wr_flags |= T3_READ_FENCE_FLAG;
 267                 if (wr->send_flags & IB_SEND_SIGNALED)
 268                         t3_wr_flags |= T3_COMPLETION_FLAG;
 269                 sqp = qhp->wq.sq +
 270                       Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2);
 271                 switch (wr->opcode) {
 272                 case IB_WR_SEND:
 273                 case IB_WR_SEND_WITH_IMM:
 274                         t3_wr_opcode = T3_WR_SEND;
 275                         err = iwch_build_rdma_send(wqe, wr, &t3_wr_flit_cnt);
 276                         break;
 277                 case IB_WR_RDMA_WRITE:
 278                 case IB_WR_RDMA_WRITE_WITH_IMM:
 279                         t3_wr_opcode = T3_WR_WRITE;
 280                         err = iwch_build_rdma_write(wqe, wr, &t3_wr_flit_cnt);
 281                         break;
 282                 case IB_WR_RDMA_READ:
 283                         t3_wr_opcode = T3_WR_READ;
 284                         t3_wr_flags = 0; /* T3 reads are always signaled */
 285                         err = iwch_build_rdma_read(wqe, wr, &t3_wr_flit_cnt);
 286                         if (err)
 287                                 break;
 288                         sqp->read_len = wqe->read.local_len;
 289                         if (!qhp->wq.oldest_read)
 290                                 qhp->wq.oldest_read = sqp;
 291                         break;
 292                 default:
 293                         PDBG("%s post of type=%d TBD!\n", __func__,
 294                              wr->opcode);
 295                         err = -EINVAL;
 296                 }
 297                 if (err) {
 298                         *bad_wr = wr;
 299                         break;
 300                 }
 301                 wqe->send.wrid.id0.hi = qhp->wq.sq_wptr;
 302                 sqp->wr_id = wr->wr_id;
 303                 sqp->opcode = wr2opcode(t3_wr_opcode);
 304                 sqp->sq_wptr = qhp->wq.sq_wptr;
 305                 sqp->complete = 0;
 306                 sqp->signaled = (wr->send_flags & IB_SEND_SIGNALED);
 307
 308                 build_fw_riwrh((void *) wqe, t3_wr_opcode, t3_wr_flags,
 309                                Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2),
 310                                0, t3_wr_flit_cnt);
 311                 PDBG("%s cookie 0x%llx wq idx 0x%x swsq idx %ld opcode %d\n",
 312                      __func__, (unsigned long long) wr->wr_id, idx,
 313                      Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2),
 314                      sqp->opcode);
 315                 wr = wr->next;
 316                 num_wrs--;
 317                 ++(qhp->wq.wptr);
 318                 ++(qhp->wq.sq_wptr);
 319         }
 320         spin_unlock_irqrestore(&qhp->lock, flag);
 321         ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
 322         return err;
 323 }
 324
 325 int iwch_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 326                       struct ib_recv_wr **bad_wr)
 327 {
 328         int err = 0;
 329         struct iwch_qp *qhp;
 330         u32 idx;
 331         union t3_wr *wqe;
 332         u32 num_wrs;
 333         unsigned long flag;
 334
 335         qhp = to_iwch_qp(ibqp);
 336         spin_lock_irqsave(&qhp->lock, flag);
 337         if (qhp->attr.state > IWCH_QP_STATE_RTS) {
 338                 spin_unlock_irqrestore(&qhp->lock, flag);
 339                 return -EINVAL;
 340         }
 341         num_wrs = Q_FREECNT(qhp->wq.rq_rptr, qhp->wq.rq_wptr,
 342                             qhp->wq.rq_size_log2) - 1;
 343         if (!wr) {
 344                 spin_unlock_irqrestore(&qhp->lock, flag);
 345                 return -EINVAL;
 346         }
 347         while (wr) {
 348                 idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
 349                 wqe = (union t3_wr *) (qhp->wq.queue + idx);
 350                 if (num_wrs)
 351                         err = iwch_build_rdma_recv(qhp->rhp, wqe, wr);
 352                 else
 353                         err = -ENOMEM;
 354                 if (err) {
 355                         *bad_wr = wr;
 356                         break;
 357                 }
 358                 qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr, qhp->wq.rq_size_log2)] =
 359                         wr->wr_id;
 360                 build_fw_riwrh((void *) wqe, T3_WR_RCV, T3_COMPLETION_FLAG,
 361                                Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2),
 362                                0, sizeof(struct t3_receive_wr) >> 3);
 363                 PDBG("%s cookie 0x%llx idx 0x%x rq_wptr 0x%x rw_rptr 0x%x "
 364                      "wqe %p \n", __func__, (unsigned long long) wr->wr_id,
 365                      idx, qhp->wq.rq_wptr, qhp->wq.rq_rptr, wqe);
 366                 ++(qhp->wq.rq_wptr);
 367                 ++(qhp->wq.wptr);
 368                 wr = wr->next;
 369                 num_wrs--;
 370         }
 371         spin_unlock_irqrestore(&qhp->lock, flag);
 372         ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
 373         return err;
 374 }
 375
 376 int iwch_bind_mw(struct ib_qp *qp,
 377                              struct ib_mw *mw,
 378                              struct ib_mw_bind *mw_bind)
 379 {
 380         struct iwch_dev *rhp;
 381         struct iwch_mw *mhp;
 382         struct iwch_qp *qhp;
 383         union t3_wr *wqe;
 384         u32 pbl_addr;
 385         u8 page_size;
 386         u32 num_wrs;
 387         unsigned long flag;
 388         struct ib_sge sgl;
 389         int err=0;
 390         enum t3_wr_flags t3_wr_flags;
 391         u32 idx;
 392         struct t3_swsq *sqp;
 393
 394         qhp = to_iwch_qp(qp);
 395         mhp = to_iwch_mw(mw);
 396         rhp = qhp->rhp;
 397
 398         spin_lock_irqsave(&qhp->lock, flag);
 399         if (qhp->attr.state > IWCH_QP_STATE_RTS) {
 400                 spin_unlock_irqrestore(&qhp->lock, flag);
 401                 return -EINVAL;
 402         }
 403         num_wrs = Q_FREECNT(qhp->wq.sq_rptr, qhp->wq.sq_wptr,
 404                             qhp->wq.sq_size_log2);
 405         if ((num_wrs) <= 0) {
 406                 spin_unlock_irqrestore(&qhp->lock, flag);
 407                 return -ENOMEM;
 408         }
 409         idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
 410         PDBG("%s: idx 0x%0x, mw 0x%p, mw_bind 0x%p\n", __func__, idx,
 411              mw, mw_bind);
 412         wqe = (union t3_wr *) (qhp->wq.queue + idx);
 413
 414         t3_wr_flags = 0;
 415         if (mw_bind->send_flags & IB_SEND_SIGNALED)
 416                 t3_wr_flags = T3_COMPLETION_FLAG;
 417
 418         sgl.addr = mw_bind->addr;
 419         sgl.lkey = mw_bind->mr->lkey;
 420         sgl.length = mw_bind->length;
 421         wqe->bind.reserved = 0;
 422         wqe->bind.type = T3_VA_BASED_TO;
 423
 424         /* TBD: check perms */
 425         wqe->bind.perms = iwch_ib_to_mwbind_access(mw_bind->mw_access_flags);
 426         wqe->bind.mr_stag = cpu_to_be32(mw_bind->mr->lkey);
 427         wqe->bind.mw_stag = cpu_to_be32(mw->rkey);
 428         wqe->bind.mw_len = cpu_to_be32(mw_bind->length);
 429         wqe->bind.mw_va = cpu_to_be64(mw_bind->addr);
 430         err = iwch_sgl2pbl_map(rhp, &sgl, 1, &pbl_addr, &page_size);
 431         if (err) {
 432                 spin_unlock_irqrestore(&qhp->lock, flag);
 433                 return err;
 434         }
 435         wqe->send.wrid.id0.hi = qhp->wq.sq_wptr;
 436         sqp = qhp->wq.sq + Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2);
 437         sqp->wr_id = mw_bind->wr_id;
 438         sqp->opcode = T3_BIND_MW;
 439         sqp->sq_wptr = qhp->wq.sq_wptr;
 440         sqp->complete = 0;
 441         sqp->signaled = (mw_bind->send_flags & IB_SEND_SIGNALED);
 442         wqe->bind.mr_pbl_addr = cpu_to_be32(pbl_addr);
 443         wqe->bind.mr_pagesz = page_size;
 444         wqe->flit[T3_SQ_COOKIE_FLIT] = mw_bind->wr_id;
 445         build_fw_riwrh((void *)wqe, T3_WR_BIND, t3_wr_flags,
 446                        Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2), 0,
 447                                 sizeof(struct t3_bind_mw_wr) >> 3);
 448         ++(qhp->wq.wptr);
 449         ++(qhp->wq.sq_wptr);
 450         spin_unlock_irqrestore(&qhp->lock, flag);
 451
 452         ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
 453
 454         return err;
 455 }
 456
 457 static inline void build_term_codes(struct respQ_msg_t *rsp_msg,
 458                                     u8 *layer_type, u8 *ecode)
 459 {
 460         int status = TPT_ERR_INTERNAL_ERR;
 461         int tagged = 0;
 462         int opcode = -1;
 463         int rqtype = 0;
 464         int send_inv = 0;
 465
 466         if (rsp_msg) {
 467                 status = CQE_STATUS(rsp_msg->cqe);
 468                 opcode = CQE_OPCODE(rsp_msg->cqe);
 469                 rqtype = RQ_TYPE(rsp_msg->cqe);
 470                 send_inv = (opcode == T3_SEND_WITH_INV) ||
 471                            (opcode == T3_SEND_WITH_SE_INV);
 472                 tagged = (opcode == T3_RDMA_WRITE) ||
 473                          (rqtype && (opcode == T3_READ_RESP));
 474         }
 475
 476         switch (status) {
 477         case TPT_ERR_STAG:
 478                 if (send_inv) {
 479                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 480                         *ecode = RDMAP_CANT_INV_STAG;
 481                 } else {
 482                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 483                         *ecode = RDMAP_INV_STAG;
 484                 }
 485                 break;
 486         case TPT_ERR_PDID:
 487                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 488                 if ((opcode == T3_SEND_WITH_INV) ||
 489                     (opcode == T3_SEND_WITH_SE_INV))
 490                         *ecode = RDMAP_CANT_INV_STAG;
 491                 else
 492                         *ecode = RDMAP_STAG_NOT_ASSOC;
 493                 break;
 494         case TPT_ERR_QPID:
 495                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 496                 *ecode = RDMAP_STAG_NOT_ASSOC;
 497                 break;
 498         case TPT_ERR_ACCESS:
 499                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 500                 *ecode = RDMAP_ACC_VIOL;
 501                 break;
 502         case TPT_ERR_WRAP:
 503                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 504                 *ecode = RDMAP_TO_WRAP;
 505                 break;
 506         case TPT_ERR_BOUND:
 507                 if (tagged) {
 508                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 509                         *ecode = DDPT_BASE_BOUNDS;
 510                 } else {
 511                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 512                         *ecode = RDMAP_BASE_BOUNDS;
 513                 }
 514                 break;
 515         case TPT_ERR_INVALIDATE_SHARED_MR:
 516         case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
 517                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 518                 *ecode = RDMAP_CANT_INV_STAG;
 519                 break;
 520         case TPT_ERR_ECC:
 521         case TPT_ERR_ECC_PSTAG:
 522         case TPT_ERR_INTERNAL_ERR:
 523                 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA;
 524                 *ecode = 0;
 525                 break;
 526         case TPT_ERR_OUT_OF_RQE:
 527                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 528                 *ecode = DDPU_INV_MSN_NOBUF;
 529                 break;
 530         case TPT_ERR_PBL_ADDR_BOUND:
 531                 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 532                 *ecode = DDPT_BASE_BOUNDS;
 533                 break;
 534         case TPT_ERR_CRC:
 535                 *layer_type = LAYER_MPA|DDP_LLP;
 536                 *ecode = MPA_CRC_ERR;
 537                 break;
 538         case TPT_ERR_MARKER:
 539                 *layer_type = LAYER_MPA|DDP_LLP;
 540                 *ecode = MPA_MARKER_ERR;
 541                 break;
 542         case TPT_ERR_PDU_LEN_ERR:
 543                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 544                 *ecode = DDPU_MSG_TOOBIG;
 545                 break;
 546         case TPT_ERR_DDP_VERSION:
 547                 if (tagged) {
 548                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 549                         *ecode = DDPT_INV_VERS;
 550                 } else {
 551                         *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 552                         *ecode = DDPU_INV_VERS;
 553                 }
 554                 break;
 555         case TPT_ERR_RDMA_VERSION:
 556                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 557                 *ecode = RDMAP_INV_VERS;
 558                 break;
 559         case TPT_ERR_OPCODE:
 560                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 561                 *ecode = RDMAP_INV_OPCODE;
 562                 break;
 563         case TPT_ERR_DDP_QUEUE_NUM:
 564                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 565                 *ecode = DDPU_INV_QN;
 566                 break;
 567         case TPT_ERR_MSN:
 568         case TPT_ERR_MSN_GAP:
 569         case TPT_ERR_MSN_RANGE:
 570         case TPT_ERR_IRD_OVERFLOW:
 571                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 572                 *ecode = DDPU_INV_MSN_RANGE;
 573                 break;
 574         case TPT_ERR_TBIT:
 575                 *layer_type = LAYER_DDP|DDP_LOCAL_CATA;
 576                 *ecode = 0;
 577                 break;
 578         case TPT_ERR_MO:
 579                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 580                 *ecode = DDPU_INV_MO;
 581                 break;
 582         default:
 583                 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
 584                 *ecode = 0;
 585                 break;
 586         }
 587 }
 588
 589 int iwch_post_zb_read(struct iwch_qp *qhp)
 590 {
 591         union t3_wr *wqe;
 592         struct sk_buff *skb;
 593         u8 flit_cnt = sizeof(struct t3_rdma_read_wr) >> 3;
 594
 595         PDBG("%s enter\n", __func__);
 596         skb = alloc_skb(40, GFP_KERNEL);
 597         if (!skb) {
 598                 printk(KERN_ERR "%s cannot send zb_read!!\n", __func__);
 599                 return -ENOMEM;
 600         }
 601         wqe = (union t3_wr *)skb_put(skb, sizeof(struct t3_rdma_read_wr));
 602         memset(wqe, 0, sizeof(struct t3_rdma_read_wr));
 603         wqe->read.rdmaop = T3_READ_REQ;
 604         wqe->read.reserved[0] = 0;
 605         wqe->read.reserved[1] = 0;
 606         wqe->read.reserved[2] = 0;
 607         wqe->read.rem_stag = cpu_to_be32(1);
 608         wqe->read.rem_to = cpu_to_be64(1);
 609         wqe->read.local_stag = cpu_to_be32(1);
 610         wqe->read.local_len = cpu_to_be32(0);
 611         wqe->read.local_to = cpu_to_be64(1);
 612         wqe->send.wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_READ));
 613         wqe->send.wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(qhp->ep->hwtid)|
 614                                                 V_FW_RIWR_LEN(flit_cnt));
 615         skb->priority = CPL_PRIORITY_DATA;
 616         return cxgb3_ofld_send(qhp->rhp->rdev.t3cdev_p, skb);
 617 }
 618
 619 /*
 620  * This posts a TERMINATE with layer=RDMA, type=catastrophic.
 621  */
 622 int iwch_post_terminate(struct iwch_qp *qhp, struct respQ_msg_t *rsp_msg)
 623 {
 624         union t3_wr *wqe;
 625         struct terminate_message *term;
 626         struct sk_buff *skb;
 627
 628         PDBG("%s %d\n", __func__, __LINE__);
 629         skb = alloc_skb(40, GFP_ATOMIC);
 630         if (!skb) {
 631                 printk(KERN_ERR "%s cannot send TERMINATE!\n", __func__);
 632                 return -ENOMEM;
 633         }
 634         wqe = (union t3_wr *)skb_put(skb, 40);
 635         memset(wqe, 0, 40);
 636         wqe->send.rdmaop = T3_TERMINATE;
 637
 638         /* immediate data length */
 639         wqe->send.plen = htonl(4);
 640
 641         /* immediate data starts here. */
 642         term = (struct terminate_message *)wqe->send.sgl;
 643         build_term_codes(rsp_msg, &term->layer_etype, &term->ecode);
 644         wqe->send.wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_SEND) |
 645                          V_FW_RIWR_FLAGS(T3_COMPLETION_FLAG | T3_NOTIFY_FLAG));
 646         wqe->send.wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(qhp->ep->hwtid));
 647         skb->priority = CPL_PRIORITY_DATA;
 648         return cxgb3_ofld_send(qhp->rhp->rdev.t3cdev_p, skb);
 649 }
 650
 651 /*
 652  * Assumes qhp lock is held.
 653  */
 654 static void __flush_qp(struct iwch_qp *qhp, unsigned long *flag)
 655 {
 656         struct iwch_cq *rchp, *schp;
 657         int count;
 658         int flushed;
 659
 660         rchp = get_chp(qhp->rhp, qhp->attr.rcq);
 661         schp = get_chp(qhp->rhp, qhp->attr.scq);
 662
 663         PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp);
 664         /* take a ref on the qhp since we must release the lock */
 665         atomic_inc(&qhp->refcnt);
 666         spin_unlock_irqrestore(&qhp->lock, *flag);
 667
 668         /* locking heirarchy: cq lock first, then qp lock. */
 669         spin_lock_irqsave(&rchp->lock, *flag);
 670         spin_lock(&qhp->lock);
 671         cxio_flush_hw_cq(&rchp->cq);
 672         cxio_count_rcqes(&rchp->cq, &qhp->wq, &count);
 673         flushed = cxio_flush_rq(&qhp->wq, &rchp->cq, count);
 674         spin_unlock(&qhp->lock);
 675         spin_unlock_irqrestore(&rchp->lock, *flag);
 676         if (flushed)
 677                 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
 678
 679         /* locking heirarchy: cq lock first, then qp lock. */
 680         spin_lock_irqsave(&schp->lock, *flag);
 681         spin_lock(&qhp->lock);
 682         cxio_flush_hw_cq(&schp->cq);
 683         cxio_count_scqes(&schp->cq, &qhp->wq, &count);
 684         flushed = cxio_flush_sq(&qhp->wq, &schp->cq, count);
 685         spin_unlock(&qhp->lock);
 686         spin_unlock_irqrestore(&schp->lock, *flag);
 687         if (flushed)
 688                 (*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context);
 689
 690         /* deref */
 691         if (atomic_dec_and_test(&qhp->refcnt))
 692                 wake_up(&qhp->wait);
 693
 694         spin_lock_irqsave(&qhp->lock, *flag);
 695 }
 696
 697 static void flush_qp(struct iwch_qp *qhp, unsigned long *flag)
 698 {
 699         if (qhp->ibqp.uobject)
 700                 cxio_set_wq_in_error(&qhp->wq);
 701         else
 702                 __flush_qp(qhp, flag);
 703 }
 704
 705
 706 /*
 707  * Return count of RECV WRs posted
 708  */
 709 u16 iwch_rqes_posted(struct iwch_qp *qhp)
 710 {
 711         union t3_wr *wqe = qhp->wq.queue;
 712         u16 count = 0;
 713         while ((count+1) != 0 && fw_riwrh_opcode((struct fw_riwrh *)wqe) == T3_WR_RCV) {
 714                 count++;
 715                 wqe++;
 716         }
 717         PDBG("%s qhp %p count %u\n", __func__, qhp, count);
 718         return count;
 719 }
 720
 721 static int rdma_init(struct iwch_dev *rhp, struct iwch_qp *qhp,
 722                                 enum iwch_qp_attr_mask mask,
 723                                 struct iwch_qp_attributes *attrs)
 724 {
 725         struct t3_rdma_init_attr init_attr;
 726         int ret;
 727
 728         init_attr.tid = qhp->ep->hwtid;
 729         init_attr.qpid = qhp->wq.qpid;
 730         init_attr.pdid = qhp->attr.pd;
 731         init_attr.scqid = qhp->attr.scq;
 732         init_attr.rcqid = qhp->attr.rcq;
 733         init_attr.rq_addr = qhp->wq.rq_addr;
 734         init_attr.rq_size = 1 << qhp->wq.rq_size_log2;
 735         init_attr.mpaattrs = uP_RI_MPA_IETF_ENABLE |
 736                 qhp->attr.mpa_attr.recv_marker_enabled |
 737                 (qhp->attr.mpa_attr.xmit_marker_enabled << 1) |
 738                 (qhp->attr.mpa_attr.crc_enabled << 2);
 739
 740         /*
 741          * XXX - The IWCM doesn't quite handle getting these
 742          * attrs set before going into RTS.  For now, just turn
 743          * them on always...
 744          */
 745 #if 0
 746         init_attr.qpcaps = qhp->attr.enableRdmaRead |
 747                 (qhp->attr.enableRdmaWrite << 1) |
 748                 (qhp->attr.enableBind << 2) |
 749                 (qhp->attr.enable_stag0_fastreg << 3) |
 750                 (qhp->attr.enable_stag0_fastreg << 4);
 751 #else
 752         init_attr.qpcaps = 0x1f;
 753 #endif
 754         init_attr.tcp_emss = qhp->ep->emss;
 755         init_attr.ord = qhp->attr.max_ord;
 756         init_attr.ird = qhp->attr.max_ird;
 757         init_attr.qp_dma_addr = qhp->wq.dma_addr;
 758         init_attr.qp_dma_size = (1UL << qhp->wq.size_log2);
 759         init_attr.rqe_count = iwch_rqes_posted(qhp);
 760         init_attr.flags = qhp->attr.mpa_attr.initiator ? MPA_INITIATOR : 0;
 761         init_attr.flags |= capable(CAP_NET_BIND_SERVICE) ? PRIV_QP : 0;
 762         if (peer2peer) {
 763                 init_attr.rtr_type = RTR_READ;
 764                 if (init_attr.ord == 0 && qhp->attr.mpa_attr.initiator)
 765                         init_attr.ord = 1;
 766                 if (init_attr.ird == 0 && !qhp->attr.mpa_attr.initiator)
 767                         init_attr.ird = 1;
 768         } else
 769                 init_attr.rtr_type = 0;
 770         init_attr.irs = qhp->ep->rcv_seq;
 771         PDBG("%s init_attr.rq_addr 0x%x init_attr.rq_size = %d "
 772              "flags 0x%x qpcaps 0x%x\n", __func__,
 773              init_attr.rq_addr, init_attr.rq_size,
 774              init_attr.flags, init_attr.qpcaps);
 775         ret = cxio_rdma_init(&rhp->rdev, &init_attr);
 776         PDBG("%s ret %d\n", __func__, ret);
 777         return ret;
 778 }
 779
 780 int iwch_modify_qp(struct iwch_dev *rhp, struct iwch_qp *qhp,
 781                                 enum iwch_qp_attr_mask mask,
 782                                 struct iwch_qp_attributes *attrs,
 783                                 int internal)
 784 {
 785         int ret = 0;
 786         struct iwch_qp_attributes newattr = qhp->attr;
 787         unsigned long flag;
 788         int disconnect = 0;
 789         int terminate = 0;
 790         int abort = 0;
 791         int free = 0;
 792         struct iwch_ep *ep = NULL;
 793
 794         PDBG("%s qhp %p qpid 0x%x ep %p state %d -> %d\n", __func__,
 795              qhp, qhp->wq.qpid, qhp->ep, qhp->attr.state,
 796              (mask & IWCH_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1);
 797
 798         spin_lock_irqsave(&qhp->lock, flag);
 799
 800         /* Process attr changes if in IDLE */
 801         if (mask & IWCH_QP_ATTR_VALID_MODIFY) {
 802                 if (qhp->attr.state != IWCH_QP_STATE_IDLE) {
 803                         ret = -EIO;
 804                         goto out;
 805                 }
 806                 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_READ)
 807                         newattr.enable_rdma_read = attrs->enable_rdma_read;
 808                 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_WRITE)
 809                         newattr.enable_rdma_write = attrs->enable_rdma_write;
 810                 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_BIND)
 811                         newattr.enable_bind = attrs->enable_bind;
 812                 if (mask & IWCH_QP_ATTR_MAX_ORD) {
 813                         if (attrs->max_ord >
 814                             rhp->attr.max_rdma_read_qp_depth) {
 815                                 ret = -EINVAL;
 816                                 goto out;
 817                         }
 818                         newattr.max_ord = attrs->max_ord;
 819                 }
 820                 if (mask & IWCH_QP_ATTR_MAX_IRD) {
 821                         if (attrs->max_ird >
 822                             rhp->attr.max_rdma_reads_per_qp) {
 823                                 ret = -EINVAL;
 824                                 goto out;
 825                         }
 826                         newattr.max_ird = attrs->max_ird;
 827                 }
 828                 qhp->attr = newattr;
 829         }
 830
 831         if (!(mask & IWCH_QP_ATTR_NEXT_STATE))
 832                 goto out;
 833         if (qhp->attr.state == attrs->next_state)
 834                 goto out;
 835
 836         switch (qhp->attr.state) {
 837         case IWCH_QP_STATE_IDLE:
 838                 switch (attrs->next_state) {
 839                 case IWCH_QP_STATE_RTS:
 840                         if (!(mask & IWCH_QP_ATTR_LLP_STREAM_HANDLE)) {
 841                                 ret = -EINVAL;
 842                                 goto out;
 843                         }
 844                         if (!(mask & IWCH_QP_ATTR_MPA_ATTR)) {
 845                                 ret = -EINVAL;
 846                                 goto out;
 847                         }
 848                         qhp->attr.mpa_attr = attrs->mpa_attr;
 849                         qhp->attr.llp_stream_handle = attrs->llp_stream_handle;
 850                         qhp->ep = qhp->attr.llp_stream_handle;
 851                         qhp->attr.state = IWCH_QP_STATE_RTS;
 852
 853                         /*
 854                          * Ref the endpoint here and deref when we
 855                          * disassociate the endpoint from the QP.  This
 856                          * happens in CLOSING->IDLE transition or *->ERROR
 857                          * transition.
 858                          */
 859                         get_ep(&qhp->ep->com);
 860                         spin_unlock_irqrestore(&qhp->lock, flag);
 861                         ret = rdma_init(rhp, qhp, mask, attrs);
 862                         spin_lock_irqsave(&qhp->lock, flag);
 863                         if (ret)
 864                                 goto err;
 865                         break;
 866                 case IWCH_QP_STATE_ERROR:
 867                         qhp->attr.state = IWCH_QP_STATE_ERROR;
 868                         flush_qp(qhp, &flag);
 869                         break;
 870                 default:
 871                         ret = -EINVAL;
 872                         goto out;
 873                 }
 874                 break;
 875         case IWCH_QP_STATE_RTS:
 876                 switch (attrs->next_state) {
 877                 case IWCH_QP_STATE_CLOSING:
 878                         BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2);
 879                         qhp->attr.state = IWCH_QP_STATE_CLOSING;
 880                         if (!internal) {
 881                                 abort=0;
 882                                 disconnect = 1;
 883                                 ep = qhp->ep;
 884                                 get_ep(&ep->com);
 885                         }
 886                         break;
 887                 case IWCH_QP_STATE_TERMINATE:
 888                         qhp->attr.state = IWCH_QP_STATE_TERMINATE;
 889                         if (qhp->ibqp.uobject)
 890                                 cxio_set_wq_in_error(&qhp->wq);
 891                         if (!internal)
 892                                 terminate = 1;
 893                         break;
 894                 case IWCH_QP_STATE_ERROR:
 895                         qhp->attr.state = IWCH_QP_STATE_ERROR;
 896                         if (!internal) {
 897                                 abort=1;
 898                                 disconnect = 1;
 899                                 ep = qhp->ep;
 900                                 get_ep(&ep->com);
 901                         }
 902                         goto err;
 903                         break;
 904                 default:
 905                         ret = -EINVAL;
 906                         goto out;
 907                 }
 908                 break;
 909         case IWCH_QP_STATE_CLOSING:
 910                 if (!internal) {
 911                         ret = -EINVAL;
 912                         goto out;
 913                 }
 914                 switch (attrs->next_state) {
 915                         case IWCH_QP_STATE_IDLE:
 916                                 flush_qp(qhp, &flag);
 917                                 qhp->attr.state = IWCH_QP_STATE_IDLE;
 918                                 qhp->attr.llp_stream_handle = NULL;
 919                                 put_ep(&qhp->ep->com);
 920                                 qhp->ep = NULL;
 921                                 wake_up(&qhp->wait);
 922                                 break;
 923                         case IWCH_QP_STATE_ERROR:
 924                                 goto err;
 925                         default:
 926                                 ret = -EINVAL;
 927                                 goto err;
 928                 }
 929                 break;
 930         case IWCH_QP_STATE_ERROR:
 931                 if (attrs->next_state != IWCH_QP_STATE_IDLE) {
 932                         ret = -EINVAL;
 933                         goto out;
 934                 }
 935
 936                 if (!Q_EMPTY(qhp->wq.sq_rptr, qhp->wq.sq_wptr) ||
 937                     !Q_EMPTY(qhp->wq.rq_rptr, qhp->wq.rq_wptr)) {
 938                         ret = -EINVAL;
 939                         goto out;
 940                 }
 941                 qhp->attr.state = IWCH_QP_STATE_IDLE;
 942                 memset(&qhp->attr, 0, sizeof(qhp->attr));
 943                 break;
 944         case IWCH_QP_STATE_TERMINATE:
 945                 if (!internal) {
 946                         ret = -EINVAL;
 947                         goto out;
 948                 }
 949                 goto err;
 950                 break;
 951         default:
 952                 printk(KERN_ERR "%s in a bad state %d\n",
 953                        __func__, qhp->attr.state);
 954                 ret = -EINVAL;
 955                 goto err;
 956                 break;
 957         }
 958         goto out;
 959 err:
 960         PDBG("%s disassociating ep %p qpid 0x%x\n", __func__, qhp->ep,
 961              qhp->wq.qpid);
 962
 963         /* disassociate the LLP connection */
 964         qhp->attr.llp_stream_handle = NULL;
 965         ep = qhp->ep;
 966         qhp->ep = NULL;
 967         qhp->attr.state = IWCH_QP_STATE_ERROR;
 968         free=1;
 969         wake_up(&qhp->wait);
 970         BUG_ON(!ep);
 971         flush_qp(qhp, &flag);
 972 out:
 973         spin_unlock_irqrestore(&qhp->lock, flag);
 974
 975         if (terminate)
 976                 iwch_post_terminate(qhp, NULL);
 977
 978         /*
 979          * If disconnect is 1, then we need to initiate a disconnect
 980          * on the EP.  This can be a normal close (RTS->CLOSING) or
 981          * an abnormal close (RTS/CLOSING->ERROR).
 982          */
 983         if (disconnect) {
 984                 iwch_ep_disconnect(ep, abort, GFP_KERNEL);
 985                 put_ep(&ep->com);
 986         }
 987
 988         /*
 989          * If free is 1, then we've disassociated the EP from the QP
 990          * and we need to dereference the EP.
 991          */
 992         if (free)
 993                 put_ep(&ep->com);
 994
 995         PDBG("%s exit state %d\n", __func__, qhp->attr.state);
 996         return ret;
 997 }
 998
 999 static int quiesce_qp(struct iwch_qp *qhp)
1000 {
1001         spin_lock_irq(&qhp->lock);
1002         iwch_quiesce_tid(qhp->ep);
1003         qhp->flags |= QP_QUIESCED;
1004         spin_unlock_irq(&qhp->lock);
1005         return 0;
1006 }
1007
1008 static int resume_qp(struct iwch_qp *qhp)
1009 {
1010         spin_lock_irq(&qhp->lock);
1011         iwch_resume_tid(qhp->ep);
1012         qhp->flags &= ~QP_QUIESCED;
1013         spin_unlock_irq(&qhp->lock);
1014         return 0;
1015 }
1016
1017 int iwch_quiesce_qps(struct iwch_cq *chp)
1018 {
1019         int i;
1020         struct iwch_qp *qhp;
1021
1022         for (i=0; i < T3_MAX_NUM_QP; i++) {
1023                 qhp = get_qhp(chp->rhp, i);
1024                 if (!qhp)
1025                         continue;
1026                 if ((qhp->attr.rcq == chp->cq.cqid) && !qp_quiesced(qhp)) {
1027                         quiesce_qp(qhp);
1028                         continue;
1029                 }
1030                 if ((qhp->attr.scq == chp->cq.cqid) && !qp_quiesced(qhp))
1031                         quiesce_qp(qhp);
1032         }
1033         return 0;
1034 }
1035
1036 int iwch_resume_qps(struct iwch_cq *chp)
1037 {
1038         int i;
1039         struct iwch_qp *qhp;
1040
1041         for (i=0; i < T3_MAX_NUM_QP; i++) {
1042                 qhp = get_qhp(chp->rhp, i);
1043                 if (!qhp)
1044                         continue;
1045                 if ((qhp->attr.rcq == chp->cq.cqid) && qp_quiesced(qhp)) {
1046                         resume_qp(qhp);
1047                         continue;
1048                 }
1049                 if ((qhp->attr.scq == chp->cq.cqid) && qp_quiesced(qhp))
1050                         resume_qp(qhp);
1051         }
1052         return 0;
1053 }