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 #include "cxio_resource.h"
  37
  38 #define NO_SUPPORT -1
  39
  40 static int build_rdma_send(union t3_wr *wqe, struct ib_send_wr *wr,
  41                                 u8 * flit_cnt)
  42 {
  43         int i;
  44         u32 plen;
  45
  46         switch (wr->opcode) {
  47         case IB_WR_SEND:
  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         case IB_WR_SEND_WITH_INV:
  55                 if (wr->send_flags & IB_SEND_SOLICITED)
  56                         wqe->send.rdmaop = T3_SEND_WITH_SE_INV;
  57                 else
  58                         wqe->send.rdmaop = T3_SEND_WITH_INV;
  59                 wqe->send.rem_stag = cpu_to_be32(wr->ex.invalidate_rkey);
  60                 break;
  61         default:
  62                 return -EINVAL;
  63         }
  64         if (wr->num_sge > T3_MAX_SGE)
  65                 return -EINVAL;
  66         wqe->send.reserved[0] = 0;
  67         wqe->send.reserved[1] = 0;
  68         wqe->send.reserved[2] = 0;
  69         plen = 0;
  70         for (i = 0; i < wr->num_sge; i++) {
  71                 if ((plen + wr->sg_list[i].length) < plen)
  72                         return -EMSGSIZE;
  73
  74                 plen += wr->sg_list[i].length;
  75                 wqe->send.sgl[i].stag = cpu_to_be32(wr->sg_list[i].lkey);
  76                 wqe->send.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
  77                 wqe->send.sgl[i].to = cpu_to_be64(wr->sg_list[i].addr);
  78         }
  79         wqe->send.num_sgle = cpu_to_be32(wr->num_sge);
  80         *flit_cnt = 4 + ((wr->num_sge) << 1);
  81         wqe->send.plen = cpu_to_be32(plen);
  82         return 0;
  83 }
  84
  85 static int build_rdma_write(union t3_wr *wqe, struct ib_send_wr *wr,
  86                                  u8 *flit_cnt)
  87 {
  88         int i;
  89         u32 plen;
  90         if (wr->num_sge > T3_MAX_SGE)
  91                 return -EINVAL;
  92         wqe->write.rdmaop = T3_RDMA_WRITE;
  93         wqe->write.reserved[0] = 0;
  94         wqe->write.reserved[1] = 0;
  95         wqe->write.reserved[2] = 0;
  96         wqe->write.stag_sink = cpu_to_be32(wr->wr.rdma.rkey);
  97         wqe->write.to_sink = cpu_to_be64(wr->wr.rdma.remote_addr);
  98
  99         if (wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
 100                 plen = 4;
 101                 wqe->write.sgl[0].stag = wr->ex.imm_data;
 102                 wqe->write.sgl[0].len = __constant_cpu_to_be32(0);
 103                 wqe->write.num_sgle = __constant_cpu_to_be32(0);
 104                 *flit_cnt = 6;
 105         } else {
 106                 plen = 0;
 107                 for (i = 0; i < wr->num_sge; i++) {
 108                         if ((plen + wr->sg_list[i].length) < plen) {
 109                                 return -EMSGSIZE;
 110                         }
 111                         plen += wr->sg_list[i].length;
 112                         wqe->write.sgl[i].stag =
 113                             cpu_to_be32(wr->sg_list[i].lkey);
 114                         wqe->write.sgl[i].len =
 115                             cpu_to_be32(wr->sg_list[i].length);
 116                         wqe->write.sgl[i].to =
 117                             cpu_to_be64(wr->sg_list[i].addr);
 118                 }
 119                 wqe->write.num_sgle = cpu_to_be32(wr->num_sge);
 120                 *flit_cnt = 5 + ((wr->num_sge) << 1);
 121         }
 122         wqe->write.plen = cpu_to_be32(plen);
 123         return 0;
 124 }
 125
 126 static int build_rdma_read(union t3_wr *wqe, struct ib_send_wr *wr,
 127                                 u8 *flit_cnt)
 128 {
 129         if (wr->num_sge > 1)
 130                 return -EINVAL;
 131         wqe->read.rdmaop = T3_READ_REQ;
 132         if (wr->opcode == IB_WR_RDMA_READ_WITH_INV)
 133                 wqe->read.local_inv = 1;
 134         else
 135                 wqe->read.local_inv = 0;
 136         wqe->read.reserved[0] = 0;
 137         wqe->read.reserved[1] = 0;
 138         wqe->read.rem_stag = cpu_to_be32(wr->wr.rdma.rkey);
 139         wqe->read.rem_to = cpu_to_be64(wr->wr.rdma.remote_addr);
 140         wqe->read.local_stag = cpu_to_be32(wr->sg_list[0].lkey);
 141         wqe->read.local_len = cpu_to_be32(wr->sg_list[0].length);
 142         wqe->read.local_to = cpu_to_be64(wr->sg_list[0].addr);
 143         *flit_cnt = sizeof(struct t3_rdma_read_wr) >> 3;
 144         return 0;
 145 }
 146
 147 static int build_fastreg(union t3_wr *wqe, struct ib_send_wr *wr,
 148                                 u8 *flit_cnt, int *wr_cnt, struct t3_wq *wq)
 149 {
 150         int i;
 151         __be64 *p;
 152
 153         if (wr->wr.fast_reg.page_list_len > T3_MAX_FASTREG_DEPTH)
 154                 return -EINVAL;
 155         *wr_cnt = 1;
 156         wqe->fastreg.stag = cpu_to_be32(wr->wr.fast_reg.rkey);
 157         wqe->fastreg.len = cpu_to_be32(wr->wr.fast_reg.length);
 158         wqe->fastreg.va_base_hi = cpu_to_be32(wr->wr.fast_reg.iova_start >> 32);
 159         wqe->fastreg.va_base_lo_fbo =
 160                                 cpu_to_be32(wr->wr.fast_reg.iova_start & 0xffffffff);
 161         wqe->fastreg.page_type_perms = cpu_to_be32(
 162                 V_FR_PAGE_COUNT(wr->wr.fast_reg.page_list_len) |
 163                 V_FR_PAGE_SIZE(wr->wr.fast_reg.page_shift-12) |
 164                 V_FR_TYPE(TPT_VATO) |
 165                 V_FR_PERMS(iwch_ib_to_tpt_access(wr->wr.fast_reg.access_flags)));
 166         p = &wqe->fastreg.pbl_addrs[0];
 167         for (i = 0; i < wr->wr.fast_reg.page_list_len; i++, p++) {
 168
 169                 /* If we need a 2nd WR, then set it up */
 170                 if (i == T3_MAX_FASTREG_FRAG) {
 171                         *wr_cnt = 2;
 172                         wqe = (union t3_wr *)(wq->queue +
 173                                 Q_PTR2IDX((wq->wptr+1), wq->size_log2));
 174                         build_fw_riwrh((void *)wqe, T3_WR_FASTREG, 0,
 175                                Q_GENBIT(wq->wptr + 1, wq->size_log2),
 176                                0, 1 + wr->wr.fast_reg.page_list_len - T3_MAX_FASTREG_FRAG,
 177                                T3_EOP);
 178
 179                         p = &wqe->pbl_frag.pbl_addrs[0];
 180                 }
 181                 *p = cpu_to_be64((u64)wr->wr.fast_reg.page_list->page_list[i]);
 182         }
 183         *flit_cnt = 5 + wr->wr.fast_reg.page_list_len;
 184         if (*flit_cnt > 15)
 185                 *flit_cnt = 15;
 186         return 0;
 187 }
 188
 189 static int build_inv_stag(union t3_wr *wqe, struct ib_send_wr *wr,
 190                                 u8 *flit_cnt)
 191 {
 192         wqe->local_inv.stag = cpu_to_be32(wr->ex.invalidate_rkey);
 193         wqe->local_inv.reserved = 0;
 194         *flit_cnt = sizeof(struct t3_local_inv_wr) >> 3;
 195         return 0;
 196 }
 197
 198 static int iwch_sgl2pbl_map(struct iwch_dev *rhp, struct ib_sge *sg_list,
 199                             u32 num_sgle, u32 * pbl_addr, u8 * page_size)
 200 {
 201         int i;
 202         struct iwch_mr *mhp;
 203         u64 offset;
 204         for (i = 0; i < num_sgle; i++) {
 205
 206                 mhp = get_mhp(rhp, (sg_list[i].lkey) >> 8);
 207                 if (!mhp) {
 208                         PDBG("%s %d\n", __func__, __LINE__);
 209                         return -EIO;
 210                 }
 211                 if (!mhp->attr.state) {
 212                         PDBG("%s %d\n", __func__, __LINE__);
 213                         return -EIO;
 214                 }
 215                 if (mhp->attr.zbva) {
 216                         PDBG("%s %d\n", __func__, __LINE__);
 217                         return -EIO;
 218                 }
 219
 220                 if (sg_list[i].addr < mhp->attr.va_fbo) {
 221                         PDBG("%s %d\n", __func__, __LINE__);
 222                         return -EINVAL;
 223                 }
 224                 if (sg_list[i].addr + ((u64) sg_list[i].length) <
 225                     sg_list[i].addr) {
 226                         PDBG("%s %d\n", __func__, __LINE__);
 227                         return -EINVAL;
 228                 }
 229                 if (sg_list[i].addr + ((u64) sg_list[i].length) >
 230                     mhp->attr.va_fbo + ((u64) mhp->attr.len)) {
 231                         PDBG("%s %d\n", __func__, __LINE__);
 232                         return -EINVAL;
 233                 }
 234                 offset = sg_list[i].addr - mhp->attr.va_fbo;
 235                 offset += mhp->attr.va_fbo &
 236                           ((1UL << (12 + mhp->attr.page_size)) - 1);
 237                 pbl_addr[i] = ((mhp->attr.pbl_addr -
 238                                 rhp->rdev.rnic_info.pbl_base) >> 3) +
 239                               (offset >> (12 + mhp->attr.page_size));
 240                 page_size[i] = mhp->attr.page_size;
 241         }
 242         return 0;
 243 }
 244
 245 static int build_rdma_recv(struct iwch_qp *qhp, union t3_wr *wqe,
 246                                 struct ib_recv_wr *wr)
 247 {
 248         int i, err = 0;
 249         u32 pbl_addr[T3_MAX_SGE];
 250         u8 page_size[T3_MAX_SGE];
 251
 252         err = iwch_sgl2pbl_map(qhp->rhp, wr->sg_list, wr->num_sge, pbl_addr,
 253                                page_size);
 254         if (err)
 255                 return err;
 256         wqe->recv.pagesz[0] = page_size[0];
 257         wqe->recv.pagesz[1] = page_size[1];
 258         wqe->recv.pagesz[2] = page_size[2];
 259         wqe->recv.pagesz[3] = page_size[3];
 260         wqe->recv.num_sgle = cpu_to_be32(wr->num_sge);
 261         for (i = 0; i < wr->num_sge; i++) {
 262                 wqe->recv.sgl[i].stag = cpu_to_be32(wr->sg_list[i].lkey);
 263                 wqe->recv.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
 264
 265                 /* to in the WQE == the offset into the page */
 266                 wqe->recv.sgl[i].to = cpu_to_be64(((u32)wr->sg_list[i].addr) &
 267                                 ((1UL << (12 + page_size[i])) - 1));
 268
 269                 /* pbl_addr is the adapters address in the PBL */
 270                 wqe->recv.pbl_addr[i] = cpu_to_be32(pbl_addr[i]);
 271         }
 272         for (; i < T3_MAX_SGE; i++) {
 273                 wqe->recv.sgl[i].stag = 0;
 274                 wqe->recv.sgl[i].len = 0;
 275                 wqe->recv.sgl[i].to = 0;
 276                 wqe->recv.pbl_addr[i] = 0;
 277         }
 278         qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
 279                              qhp->wq.rq_size_log2)].wr_id = wr->wr_id;
 280         qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
 281                              qhp->wq.rq_size_log2)].pbl_addr = 0;
 282         return 0;
 283 }
 284
 285 static int build_zero_stag_recv(struct iwch_qp *qhp, union t3_wr *wqe,
 286                                 struct ib_recv_wr *wr)
 287 {
 288         int i;
 289         u32 pbl_addr;
 290         u32 pbl_offset;
 291
 292
 293         /*
 294          * The T3 HW requires the PBL in the HW recv descriptor to reference
 295          * a PBL entry.  So we allocate the max needed PBL memory here and pass
 296          * it to the uP in the recv WR.  The uP will build the PBL and setup
 297          * the HW recv descriptor.
 298          */
 299         pbl_addr = cxio_hal_pblpool_alloc(&qhp->rhp->rdev, T3_STAG0_PBL_SIZE);
 300         if (!pbl_addr)
 301                 return -ENOMEM;
 302
 303         /*
 304          * Compute the 8B aligned offset.
 305          */
 306         pbl_offset = (pbl_addr - qhp->rhp->rdev.rnic_info.pbl_base) >> 3;
 307
 308         wqe->recv.num_sgle = cpu_to_be32(wr->num_sge);
 309
 310         for (i = 0; i < wr->num_sge; i++) {
 311
 312                 /*
 313                  * Use a 128MB page size. This and an imposed 128MB
 314                  * sge length limit allows us to require only a 2-entry HW
 315                  * PBL for each SGE.  This restriction is acceptable since
 316                  * since it is not possible to allocate 128MB of contiguous
 317                  * DMA coherent memory!
 318                  */
 319                 if (wr->sg_list[i].length > T3_STAG0_MAX_PBE_LEN)
 320                         return -EINVAL;
 321                 wqe->recv.pagesz[i] = T3_STAG0_PAGE_SHIFT;
 322
 323                 /*
 324                  * T3 restricts a recv to all zero-stag or all non-zero-stag.
 325                  */
 326                 if (wr->sg_list[i].lkey != 0)
 327                         return -EINVAL;
 328                 wqe->recv.sgl[i].stag = 0;
 329                 wqe->recv.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
 330                 wqe->recv.sgl[i].to = cpu_to_be64(wr->sg_list[i].addr);
 331                 wqe->recv.pbl_addr[i] = cpu_to_be32(pbl_offset);
 332                 pbl_offset += 2;
 333         }
 334         for (; i < T3_MAX_SGE; i++) {
 335                 wqe->recv.pagesz[i] = 0;
 336                 wqe->recv.sgl[i].stag = 0;
 337                 wqe->recv.sgl[i].len = 0;
 338                 wqe->recv.sgl[i].to = 0;
 339                 wqe->recv.pbl_addr[i] = 0;
 340         }
 341         qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
 342                              qhp->wq.rq_size_log2)].wr_id = wr->wr_id;
 343         qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
 344                              qhp->wq.rq_size_log2)].pbl_addr = pbl_addr;
 345         return 0;
 346 }
 347
 348 int iwch_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 349                       struct ib_send_wr **bad_wr)
 350 {
 351         int err = 0;
 352         u8 uninitialized_var(t3_wr_flit_cnt);
 353         enum t3_wr_opcode t3_wr_opcode = 0;
 354         enum t3_wr_flags t3_wr_flags;
 355         struct iwch_qp *qhp;
 356         u32 idx;
 357         union t3_wr *wqe;
 358         u32 num_wrs;
 359         unsigned long flag;
 360         struct t3_swsq *sqp;
 361         int wr_cnt = 1;
 362
 363         qhp = to_iwch_qp(ibqp);
 364         spin_lock_irqsave(&qhp->lock, flag);
 365         if (qhp->attr.state > IWCH_QP_STATE_RTS) {
 366                 spin_unlock_irqrestore(&qhp->lock, flag);
 367                 return -EINVAL;
 368         }
 369         num_wrs = Q_FREECNT(qhp->wq.sq_rptr, qhp->wq.sq_wptr,
 370                   qhp->wq.sq_size_log2);
 371         if (num_wrs <= 0) {
 372                 spin_unlock_irqrestore(&qhp->lock, flag);
 373                 return -ENOMEM;
 374         }
 375         while (wr) {
 376                 if (num_wrs == 0) {
 377                         err = -ENOMEM;
 378                         *bad_wr = wr;
 379                         break;
 380                 }
 381                 idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
 382                 wqe = (union t3_wr *) (qhp->wq.queue + idx);
 383                 t3_wr_flags = 0;
 384                 if (wr->send_flags & IB_SEND_SOLICITED)
 385                         t3_wr_flags |= T3_SOLICITED_EVENT_FLAG;
 386                 if (wr->send_flags & IB_SEND_SIGNALED)
 387                         t3_wr_flags |= T3_COMPLETION_FLAG;
 388                 sqp = qhp->wq.sq +
 389                       Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2);
 390                 switch (wr->opcode) {
 391                 case IB_WR_SEND:
 392                 case IB_WR_SEND_WITH_INV:
 393                         if (wr->send_flags & IB_SEND_FENCE)
 394                                 t3_wr_flags |= T3_READ_FENCE_FLAG;
 395                         t3_wr_opcode = T3_WR_SEND;
 396                         err = build_rdma_send(wqe, wr, &t3_wr_flit_cnt);
 397                         break;
 398                 case IB_WR_RDMA_WRITE:
 399                 case IB_WR_RDMA_WRITE_WITH_IMM:
 400                         t3_wr_opcode = T3_WR_WRITE;
 401                         err = build_rdma_write(wqe, wr, &t3_wr_flit_cnt);
 402                         break;
 403                 case IB_WR_RDMA_READ:
 404                 case IB_WR_RDMA_READ_WITH_INV:
 405                         t3_wr_opcode = T3_WR_READ;
 406                         t3_wr_flags = 0; /* T3 reads are always signaled */
 407                         err = build_rdma_read(wqe, wr, &t3_wr_flit_cnt);
 408                         if (err)
 409                                 break;
 410                         sqp->read_len = wqe->read.local_len;
 411                         if (!qhp->wq.oldest_read)
 412                                 qhp->wq.oldest_read = sqp;
 413                         break;
 414                 case IB_WR_FAST_REG_MR:
 415                         t3_wr_opcode = T3_WR_FASTREG;
 416                         err = build_fastreg(wqe, wr, &t3_wr_flit_cnt,
 417                                                  &wr_cnt, &qhp->wq);
 418                         break;
 419                 case IB_WR_LOCAL_INV:
 420                         if (wr->send_flags & IB_SEND_FENCE)
 421                                 t3_wr_flags |= T3_LOCAL_FENCE_FLAG;
 422                         t3_wr_opcode = T3_WR_INV_STAG;
 423                         err = build_inv_stag(wqe, wr, &t3_wr_flit_cnt);
 424                         break;
 425                 default:
 426                         PDBG("%s post of type=%d TBD!\n", __func__,
 427                              wr->opcode);
 428                         err = -EINVAL;
 429                 }
 430                 if (err) {
 431                         *bad_wr = wr;
 432                         break;
 433                 }
 434                 wqe->send.wrid.id0.hi = qhp->wq.sq_wptr;
 435                 sqp->wr_id = wr->wr_id;
 436                 sqp->opcode = wr2opcode(t3_wr_opcode);
 437                 sqp->sq_wptr = qhp->wq.sq_wptr;
 438                 sqp->complete = 0;
 439                 sqp->signaled = (wr->send_flags & IB_SEND_SIGNALED);
 440
 441                 build_fw_riwrh((void *) wqe, t3_wr_opcode, t3_wr_flags,
 442                                Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2),
 443                                0, t3_wr_flit_cnt,
 444                                (wr_cnt == 1) ? T3_SOPEOP : T3_SOP);
 445                 PDBG("%s cookie 0x%llx wq idx 0x%x swsq idx %ld opcode %d\n",
 446                      __func__, (unsigned long long) wr->wr_id, idx,
 447                      Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2),
 448                      sqp->opcode);
 449                 wr = wr->next;
 450                 num_wrs--;
 451                 qhp->wq.wptr += wr_cnt;
 452                 ++(qhp->wq.sq_wptr);
 453         }
 454         spin_unlock_irqrestore(&qhp->lock, flag);
 455         ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
 456         return err;
 457 }
 458
 459 int iwch_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 460                       struct ib_recv_wr **bad_wr)
 461 {
 462         int err = 0;
 463         struct iwch_qp *qhp;
 464         u32 idx;
 465         union t3_wr *wqe;
 466         u32 num_wrs;
 467         unsigned long flag;
 468
 469         qhp = to_iwch_qp(ibqp);
 470         spin_lock_irqsave(&qhp->lock, flag);
 471         if (qhp->attr.state > IWCH_QP_STATE_RTS) {
 472                 spin_unlock_irqrestore(&qhp->lock, flag);
 473                 return -EINVAL;
 474         }
 475         num_wrs = Q_FREECNT(qhp->wq.rq_rptr, qhp->wq.rq_wptr,
 476                             qhp->wq.rq_size_log2) - 1;
 477         if (!wr) {
 478                 spin_unlock_irqrestore(&qhp->lock, flag);
 479                 return -EINVAL;
 480         }
 481         while (wr) {
 482                 if (wr->num_sge > T3_MAX_SGE) {
 483                         err = -EINVAL;
 484                         *bad_wr = wr;
 485                         break;
 486                 }
 487                 idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
 488                 wqe = (union t3_wr *) (qhp->wq.queue + idx);
 489                 if (num_wrs)
 490                         if (wr->sg_list[0].lkey)
 491                                 err = build_rdma_recv(qhp, wqe, wr);
 492                         else
 493                                 err = build_zero_stag_recv(qhp, wqe, wr);
 494                 else
 495                         err = -ENOMEM;
 496                 if (err) {
 497                         *bad_wr = wr;
 498                         break;
 499                 }
 500                 build_fw_riwrh((void *) wqe, T3_WR_RCV, T3_COMPLETION_FLAG,
 501                                Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2),
 502                                0, sizeof(struct t3_receive_wr) >> 3, T3_SOPEOP);
 503                 PDBG("%s cookie 0x%llx idx 0x%x rq_wptr 0x%x rw_rptr 0x%x "
 504                      "wqe %p \n", __func__, (unsigned long long) wr->wr_id,
 505                      idx, qhp->wq.rq_wptr, qhp->wq.rq_rptr, wqe);
 506                 ++(qhp->wq.rq_wptr);
 507                 ++(qhp->wq.wptr);
 508                 wr = wr->next;
 509                 num_wrs--;
 510         }
 511         spin_unlock_irqrestore(&qhp->lock, flag);
 512         ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
 513         return err;
 514 }
 515
 516 int iwch_bind_mw(struct ib_qp *qp,
 517                              struct ib_mw *mw,
 518                              struct ib_mw_bind *mw_bind)
 519 {
 520         struct iwch_dev *rhp;
 521         struct iwch_mw *mhp;
 522         struct iwch_qp *qhp;
 523         union t3_wr *wqe;
 524         u32 pbl_addr;
 525         u8 page_size;
 526         u32 num_wrs;
 527         unsigned long flag;
 528         struct ib_sge sgl;
 529         int err=0;
 530         enum t3_wr_flags t3_wr_flags;
 531         u32 idx;
 532         struct t3_swsq *sqp;
 533
 534         qhp = to_iwch_qp(qp);
 535         mhp = to_iwch_mw(mw);
 536         rhp = qhp->rhp;
 537
 538         spin_lock_irqsave(&qhp->lock, flag);
 539         if (qhp->attr.state > IWCH_QP_STATE_RTS) {
 540                 spin_unlock_irqrestore(&qhp->lock, flag);
 541                 return -EINVAL;
 542         }
 543         num_wrs = Q_FREECNT(qhp->wq.sq_rptr, qhp->wq.sq_wptr,
 544                             qhp->wq.sq_size_log2);
 545         if ((num_wrs) <= 0) {
 546                 spin_unlock_irqrestore(&qhp->lock, flag);
 547                 return -ENOMEM;
 548         }
 549         idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
 550         PDBG("%s: idx 0x%0x, mw 0x%p, mw_bind 0x%p\n", __func__, idx,
 551              mw, mw_bind);
 552         wqe = (union t3_wr *) (qhp->wq.queue + idx);
 553
 554         t3_wr_flags = 0;
 555         if (mw_bind->send_flags & IB_SEND_SIGNALED)
 556                 t3_wr_flags = T3_COMPLETION_FLAG;
 557
 558         sgl.addr = mw_bind->addr;
 559         sgl.lkey = mw_bind->mr->lkey;
 560         sgl.length = mw_bind->length;
 561         wqe->bind.reserved = 0;
 562         wqe->bind.type = TPT_VATO;
 563
 564         /* TBD: check perms */
 565         wqe->bind.perms = iwch_ib_to_tpt_bind_access(mw_bind->mw_access_flags);
 566         wqe->bind.mr_stag = cpu_to_be32(mw_bind->mr->lkey);
 567         wqe->bind.mw_stag = cpu_to_be32(mw->rkey);
 568         wqe->bind.mw_len = cpu_to_be32(mw_bind->length);
 569         wqe->bind.mw_va = cpu_to_be64(mw_bind->addr);
 570         err = iwch_sgl2pbl_map(rhp, &sgl, 1, &pbl_addr, &page_size);
 571         if (err) {
 572                 spin_unlock_irqrestore(&qhp->lock, flag);
 573                 return err;
 574         }
 575         wqe->send.wrid.id0.hi = qhp->wq.sq_wptr;
 576         sqp = qhp->wq.sq + Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2);
 577         sqp->wr_id = mw_bind->wr_id;
 578         sqp->opcode = T3_BIND_MW;
 579         sqp->sq_wptr = qhp->wq.sq_wptr;
 580         sqp->complete = 0;
 581         sqp->signaled = (mw_bind->send_flags & IB_SEND_SIGNALED);
 582         wqe->bind.mr_pbl_addr = cpu_to_be32(pbl_addr);
 583         wqe->bind.mr_pagesz = page_size;
 584         build_fw_riwrh((void *)wqe, T3_WR_BIND, t3_wr_flags,
 585                        Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2), 0,
 586                        sizeof(struct t3_bind_mw_wr) >> 3, T3_SOPEOP);
 587         ++(qhp->wq.wptr);
 588         ++(qhp->wq.sq_wptr);
 589         spin_unlock_irqrestore(&qhp->lock, flag);
 590
 591         ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
 592
 593         return err;
 594 }
 595
 596 static inline void build_term_codes(struct respQ_msg_t *rsp_msg,
 597                                     u8 *layer_type, u8 *ecode)
 598 {
 599         int status = TPT_ERR_INTERNAL_ERR;
 600         int tagged = 0;
 601         int opcode = -1;
 602         int rqtype = 0;
 603         int send_inv = 0;
 604
 605         if (rsp_msg) {
 606                 status = CQE_STATUS(rsp_msg->cqe);
 607                 opcode = CQE_OPCODE(rsp_msg->cqe);
 608                 rqtype = RQ_TYPE(rsp_msg->cqe);
 609                 send_inv = (opcode == T3_SEND_WITH_INV) ||
 610                            (opcode == T3_SEND_WITH_SE_INV);
 611                 tagged = (opcode == T3_RDMA_WRITE) ||
 612                          (rqtype && (opcode == T3_READ_RESP));
 613         }
 614
 615         switch (status) {
 616         case TPT_ERR_STAG:
 617                 if (send_inv) {
 618                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 619                         *ecode = RDMAP_CANT_INV_STAG;
 620                 } else {
 621                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 622                         *ecode = RDMAP_INV_STAG;
 623                 }
 624                 break;
 625         case TPT_ERR_PDID:
 626                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 627                 if ((opcode == T3_SEND_WITH_INV) ||
 628                     (opcode == T3_SEND_WITH_SE_INV))
 629                         *ecode = RDMAP_CANT_INV_STAG;
 630                 else
 631                         *ecode = RDMAP_STAG_NOT_ASSOC;
 632                 break;
 633         case TPT_ERR_QPID:
 634                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 635                 *ecode = RDMAP_STAG_NOT_ASSOC;
 636                 break;
 637         case TPT_ERR_ACCESS:
 638                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 639                 *ecode = RDMAP_ACC_VIOL;
 640                 break;
 641         case TPT_ERR_WRAP:
 642                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 643                 *ecode = RDMAP_TO_WRAP;
 644                 break;
 645         case TPT_ERR_BOUND:
 646                 if (tagged) {
 647                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 648                         *ecode = DDPT_BASE_BOUNDS;
 649                 } else {
 650                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 651                         *ecode = RDMAP_BASE_BOUNDS;
 652                 }
 653                 break;
 654         case TPT_ERR_INVALIDATE_SHARED_MR:
 655         case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
 656                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 657                 *ecode = RDMAP_CANT_INV_STAG;
 658                 break;
 659         case TPT_ERR_ECC:
 660         case TPT_ERR_ECC_PSTAG:
 661         case TPT_ERR_INTERNAL_ERR:
 662                 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA;
 663                 *ecode = 0;
 664                 break;
 665         case TPT_ERR_OUT_OF_RQE:
 666                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 667                 *ecode = DDPU_INV_MSN_NOBUF;
 668                 break;
 669         case TPT_ERR_PBL_ADDR_BOUND:
 670                 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 671                 *ecode = DDPT_BASE_BOUNDS;
 672                 break;
 673         case TPT_ERR_CRC:
 674                 *layer_type = LAYER_MPA|DDP_LLP;
 675                 *ecode = MPA_CRC_ERR;
 676                 break;
 677         case TPT_ERR_MARKER:
 678                 *layer_type = LAYER_MPA|DDP_LLP;
 679                 *ecode = MPA_MARKER_ERR;
 680                 break;
 681         case TPT_ERR_PDU_LEN_ERR:
 682                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 683                 *ecode = DDPU_MSG_TOOBIG;
 684                 break;
 685         case TPT_ERR_DDP_VERSION:
 686                 if (tagged) {
 687                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 688                         *ecode = DDPT_INV_VERS;
 689                 } else {
 690                         *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 691                         *ecode = DDPU_INV_VERS;
 692                 }
 693                 break;
 694         case TPT_ERR_RDMA_VERSION:
 695                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 696                 *ecode = RDMAP_INV_VERS;
 697                 break;
 698         case TPT_ERR_OPCODE:
 699                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 700                 *ecode = RDMAP_INV_OPCODE;
 701                 break;
 702         case TPT_ERR_DDP_QUEUE_NUM:
 703                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 704                 *ecode = DDPU_INV_QN;
 705                 break;
 706         case TPT_ERR_MSN:
 707         case TPT_ERR_MSN_GAP:
 708         case TPT_ERR_MSN_RANGE:
 709         case TPT_ERR_IRD_OVERFLOW:
 710                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 711                 *ecode = DDPU_INV_MSN_RANGE;
 712                 break;
 713         case TPT_ERR_TBIT:
 714                 *layer_type = LAYER_DDP|DDP_LOCAL_CATA;
 715                 *ecode = 0;
 716                 break;
 717         case TPT_ERR_MO:
 718                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 719                 *ecode = DDPU_INV_MO;
 720                 break;
 721         default:
 722                 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
 723                 *ecode = 0;
 724                 break;
 725         }
 726 }
 727
 728 int iwch_post_zb_read(struct iwch_qp *qhp)
 729 {
 730         union t3_wr *wqe;
 731         struct sk_buff *skb;
 732         u8 flit_cnt = sizeof(struct t3_rdma_read_wr) >> 3;
 733
 734         PDBG("%s enter\n", __func__);
 735         skb = alloc_skb(40, GFP_KERNEL);
 736         if (!skb) {
 737                 printk(KERN_ERR "%s cannot send zb_read!!\n", __func__);
 738                 return -ENOMEM;
 739         }
 740         wqe = (union t3_wr *)skb_put(skb, sizeof(struct t3_rdma_read_wr));
 741         memset(wqe, 0, sizeof(struct t3_rdma_read_wr));
 742         wqe->read.rdmaop = T3_READ_REQ;
 743         wqe->read.reserved[0] = 0;
 744         wqe->read.reserved[1] = 0;
 745         wqe->read.rem_stag = cpu_to_be32(1);
 746         wqe->read.rem_to = cpu_to_be64(1);
 747         wqe->read.local_stag = cpu_to_be32(1);
 748         wqe->read.local_len = cpu_to_be32(0);
 749         wqe->read.local_to = cpu_to_be64(1);
 750         wqe->send.wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_READ));
 751         wqe->send.wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(qhp->ep->hwtid)|
 752                                                 V_FW_RIWR_LEN(flit_cnt));
 753         skb->priority = CPL_PRIORITY_DATA;
 754         return cxgb3_ofld_send(qhp->rhp->rdev.t3cdev_p, skb);
 755 }
 756
 757 /*
 758  * This posts a TERMINATE with layer=RDMA, type=catastrophic.
 759  */
 760 int iwch_post_terminate(struct iwch_qp *qhp, struct respQ_msg_t *rsp_msg)
 761 {
 762         union t3_wr *wqe;
 763         struct terminate_message *term;
 764         struct sk_buff *skb;
 765
 766         PDBG("%s %d\n", __func__, __LINE__);
 767         skb = alloc_skb(40, GFP_ATOMIC);
 768         if (!skb) {
 769                 printk(KERN_ERR "%s cannot send TERMINATE!\n", __func__);
 770                 return -ENOMEM;
 771         }
 772         wqe = (union t3_wr *)skb_put(skb, 40);
 773         memset(wqe, 0, 40);
 774         wqe->send.rdmaop = T3_TERMINATE;
 775
 776         /* immediate data length */
 777         wqe->send.plen = htonl(4);
 778
 779         /* immediate data starts here. */
 780         term = (struct terminate_message *)wqe->send.sgl;
 781         build_term_codes(rsp_msg, &term->layer_etype, &term->ecode);
 782         wqe->send.wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_SEND) |
 783                          V_FW_RIWR_FLAGS(T3_COMPLETION_FLAG | T3_NOTIFY_FLAG));
 784         wqe->send.wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(qhp->ep->hwtid));
 785         skb->priority = CPL_PRIORITY_DATA;
 786         return cxgb3_ofld_send(qhp->rhp->rdev.t3cdev_p, skb);
 787 }
 788
 789 /*
 790  * Assumes qhp lock is held.
 791  */
 792 static void __flush_qp(struct iwch_qp *qhp, unsigned long *flag)
 793 {
 794         struct iwch_cq *rchp, *schp;
 795         int count;
 796         int flushed;
 797
 798         rchp = get_chp(qhp->rhp, qhp->attr.rcq);
 799         schp = get_chp(qhp->rhp, qhp->attr.scq);
 800
 801         PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp);
 802         /* take a ref on the qhp since we must release the lock */
 803         atomic_inc(&qhp->refcnt);
 804         spin_unlock_irqrestore(&qhp->lock, *flag);
 805
 806         /* locking heirarchy: cq lock first, then qp lock. */
 807         spin_lock_irqsave(&rchp->lock, *flag);
 808         spin_lock(&qhp->lock);
 809         cxio_flush_hw_cq(&rchp->cq);
 810         cxio_count_rcqes(&rchp->cq, &qhp->wq, &count);
 811         flushed = cxio_flush_rq(&qhp->wq, &rchp->cq, count);
 812         spin_unlock(&qhp->lock);
 813         spin_unlock_irqrestore(&rchp->lock, *flag);
 814         if (flushed)
 815                 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
 816
 817         /* locking heirarchy: cq lock first, then qp lock. */
 818         spin_lock_irqsave(&schp->lock, *flag);
 819         spin_lock(&qhp->lock);
 820         cxio_flush_hw_cq(&schp->cq);
 821         cxio_count_scqes(&schp->cq, &qhp->wq, &count);
 822         flushed = cxio_flush_sq(&qhp->wq, &schp->cq, count);
 823         spin_unlock(&qhp->lock);
 824         spin_unlock_irqrestore(&schp->lock, *flag);
 825         if (flushed)
 826                 (*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context);
 827
 828         /* deref */
 829         if (atomic_dec_and_test(&qhp->refcnt))
 830                 wake_up(&qhp->wait);
 831
 832         spin_lock_irqsave(&qhp->lock, *flag);
 833 }
 834
 835 static void flush_qp(struct iwch_qp *qhp, unsigned long *flag)
 836 {
 837         if (qhp->ibqp.uobject)
 838                 cxio_set_wq_in_error(&qhp->wq);
 839         else
 840                 __flush_qp(qhp, flag);
 841 }
 842
 843
 844 /*
 845  * Return count of RECV WRs posted
 846  */
 847 u16 iwch_rqes_posted(struct iwch_qp *qhp)
 848 {
 849         union t3_wr *wqe = qhp->wq.queue;
 850         u16 count = 0;
 851         while ((count+1) != 0 && fw_riwrh_opcode((struct fw_riwrh *)wqe) == T3_WR_RCV) {
 852                 count++;
 853                 wqe++;
 854         }
 855         PDBG("%s qhp %p count %u\n", __func__, qhp, count);
 856         return count;
 857 }
 858
 859 static int rdma_init(struct iwch_dev *rhp, struct iwch_qp *qhp,
 860                                 enum iwch_qp_attr_mask mask,
 861                                 struct iwch_qp_attributes *attrs)
 862 {
 863         struct t3_rdma_init_attr init_attr;
 864         int ret;
 865
 866         init_attr.tid = qhp->ep->hwtid;
 867         init_attr.qpid = qhp->wq.qpid;
 868         init_attr.pdid = qhp->attr.pd;
 869         init_attr.scqid = qhp->attr.scq;
 870         init_attr.rcqid = qhp->attr.rcq;
 871         init_attr.rq_addr = qhp->wq.rq_addr;
 872         init_attr.rq_size = 1 << qhp->wq.rq_size_log2;
 873         init_attr.mpaattrs = uP_RI_MPA_IETF_ENABLE |
 874                 qhp->attr.mpa_attr.recv_marker_enabled |
 875                 (qhp->attr.mpa_attr.xmit_marker_enabled << 1) |
 876                 (qhp->attr.mpa_attr.crc_enabled << 2);
 877
 878         init_attr.qpcaps = uP_RI_QP_RDMA_READ_ENABLE |
 879                            uP_RI_QP_RDMA_WRITE_ENABLE |
 880                            uP_RI_QP_BIND_ENABLE;
 881         if (!qhp->ibqp.uobject)
 882                 init_attr.qpcaps |= uP_RI_QP_STAG0_ENABLE |
 883                                     uP_RI_QP_FAST_REGISTER_ENABLE;
 884
 885         init_attr.tcp_emss = qhp->ep->emss;
 886         init_attr.ord = qhp->attr.max_ord;
 887         init_attr.ird = qhp->attr.max_ird;
 888         init_attr.qp_dma_addr = qhp->wq.dma_addr;
 889         init_attr.qp_dma_size = (1UL << qhp->wq.size_log2);
 890         init_attr.rqe_count = iwch_rqes_posted(qhp);
 891         init_attr.flags = qhp->attr.mpa_attr.initiator ? MPA_INITIATOR : 0;
 892         if (peer2peer) {
 893                 init_attr.rtr_type = RTR_READ;
 894                 if (init_attr.ord == 0 && qhp->attr.mpa_attr.initiator)
 895                         init_attr.ord = 1;
 896                 if (init_attr.ird == 0 && !qhp->attr.mpa_attr.initiator)
 897                         init_attr.ird = 1;
 898         } else
 899                 init_attr.rtr_type = 0;
 900         init_attr.irs = qhp->ep->rcv_seq;
 901         PDBG("%s init_attr.rq_addr 0x%x init_attr.rq_size = %d "
 902              "flags 0x%x qpcaps 0x%x\n", __func__,
 903              init_attr.rq_addr, init_attr.rq_size,
 904              init_attr.flags, init_attr.qpcaps);
 905         ret = cxio_rdma_init(&rhp->rdev, &init_attr);
 906         PDBG("%s ret %d\n", __func__, ret);
 907         return ret;
 908 }
 909
 910 int iwch_modify_qp(struct iwch_dev *rhp, struct iwch_qp *qhp,
 911                                 enum iwch_qp_attr_mask mask,
 912                                 struct iwch_qp_attributes *attrs,
 913                                 int internal)
 914 {
 915         int ret = 0;
 916         struct iwch_qp_attributes newattr = qhp->attr;
 917         unsigned long flag;
 918         int disconnect = 0;
 919         int terminate = 0;
 920         int abort = 0;
 921         int free = 0;
 922         struct iwch_ep *ep = NULL;
 923
 924         PDBG("%s qhp %p qpid 0x%x ep %p state %d -> %d\n", __func__,
 925              qhp, qhp->wq.qpid, qhp->ep, qhp->attr.state,
 926              (mask & IWCH_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1);
 927
 928         spin_lock_irqsave(&qhp->lock, flag);
 929
 930         /* Process attr changes if in IDLE */
 931         if (mask & IWCH_QP_ATTR_VALID_MODIFY) {
 932                 if (qhp->attr.state != IWCH_QP_STATE_IDLE) {
 933                         ret = -EIO;
 934                         goto out;
 935                 }
 936                 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_READ)
 937                         newattr.enable_rdma_read = attrs->enable_rdma_read;
 938                 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_WRITE)
 939                         newattr.enable_rdma_write = attrs->enable_rdma_write;
 940                 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_BIND)
 941                         newattr.enable_bind = attrs->enable_bind;
 942                 if (mask & IWCH_QP_ATTR_MAX_ORD) {
 943                         if (attrs->max_ord >
 944                             rhp->attr.max_rdma_read_qp_depth) {
 945                                 ret = -EINVAL;
 946                                 goto out;
 947                         }
 948                         newattr.max_ord = attrs->max_ord;
 949                 }
 950                 if (mask & IWCH_QP_ATTR_MAX_IRD) {
 951                         if (attrs->max_ird >
 952                             rhp->attr.max_rdma_reads_per_qp) {
 953                                 ret = -EINVAL;
 954                                 goto out;
 955                         }
 956                         newattr.max_ird = attrs->max_ird;
 957                 }
 958                 qhp->attr = newattr;
 959         }
 960
 961         if (!(mask & IWCH_QP_ATTR_NEXT_STATE))
 962                 goto out;
 963         if (qhp->attr.state == attrs->next_state)
 964                 goto out;
 965
 966         switch (qhp->attr.state) {
 967         case IWCH_QP_STATE_IDLE:
 968                 switch (attrs->next_state) {
 969                 case IWCH_QP_STATE_RTS:
 970                         if (!(mask & IWCH_QP_ATTR_LLP_STREAM_HANDLE)) {
 971                                 ret = -EINVAL;
 972                                 goto out;
 973                         }
 974                         if (!(mask & IWCH_QP_ATTR_MPA_ATTR)) {
 975                                 ret = -EINVAL;
 976                                 goto out;
 977                         }
 978                         qhp->attr.mpa_attr = attrs->mpa_attr;
 979                         qhp->attr.llp_stream_handle = attrs->llp_stream_handle;
 980                         qhp->ep = qhp->attr.llp_stream_handle;
 981                         qhp->attr.state = IWCH_QP_STATE_RTS;
 982
 983                         /*
 984                          * Ref the endpoint here and deref when we
 985                          * disassociate the endpoint from the QP.  This
 986                          * happens in CLOSING->IDLE transition or *->ERROR
 987                          * transition.
 988                          */
 989                         get_ep(&qhp->ep->com);
 990                         spin_unlock_irqrestore(&qhp->lock, flag);
 991                         ret = rdma_init(rhp, qhp, mask, attrs);
 992                         spin_lock_irqsave(&qhp->lock, flag);
 993                         if (ret)
 994                                 goto err;
 995                         break;
 996                 case IWCH_QP_STATE_ERROR:
 997                         qhp->attr.state = IWCH_QP_STATE_ERROR;
 998                         flush_qp(qhp, &flag);
 999                         break;
1000                 default:
1001                         ret = -EINVAL;
1002                         goto out;
1003                 }
1004                 break;
1005         case IWCH_QP_STATE_RTS:
1006                 switch (attrs->next_state) {
1007                 case IWCH_QP_STATE_CLOSING:
1008                         BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2);
1009                         qhp->attr.state = IWCH_QP_STATE_CLOSING;
1010                         if (!internal) {
1011                                 abort=0;
1012                                 disconnect = 1;
1013                                 ep = qhp->ep;
1014                                 get_ep(&ep->com);
1015                         }
1016                         break;
1017                 case IWCH_QP_STATE_TERMINATE:
1018                         qhp->attr.state = IWCH_QP_STATE_TERMINATE;
1019                         if (qhp->ibqp.uobject)
1020                                 cxio_set_wq_in_error(&qhp->wq);
1021                         if (!internal)
1022                                 terminate = 1;
1023                         break;
1024                 case IWCH_QP_STATE_ERROR:
1025                         qhp->attr.state = IWCH_QP_STATE_ERROR;
1026                         if (!internal) {
1027                                 abort=1;
1028                                 disconnect = 1;
1029                                 ep = qhp->ep;
1030                                 get_ep(&ep->com);
1031                         }
1032                         goto err;
1033                         break;
1034                 default:
1035                         ret = -EINVAL;
1036                         goto out;
1037                 }
1038                 break;
1039         case IWCH_QP_STATE_CLOSING:
1040                 if (!internal) {
1041                         ret = -EINVAL;
1042                         goto out;
1043                 }
1044                 switch (attrs->next_state) {
1045                         case IWCH_QP_STATE_IDLE:
1046                                 flush_qp(qhp, &flag);
1047                                 qhp->attr.state = IWCH_QP_STATE_IDLE;
1048                                 qhp->attr.llp_stream_handle = NULL;
1049                                 put_ep(&qhp->ep->com);
1050                                 qhp->ep = NULL;
1051                                 wake_up(&qhp->wait);
1052                                 break;
1053                         case IWCH_QP_STATE_ERROR:
1054                                 goto err;
1055                         default:
1056                                 ret = -EINVAL;
1057                                 goto err;
1058                 }
1059                 break;
1060         case IWCH_QP_STATE_ERROR:
1061                 if (attrs->next_state != IWCH_QP_STATE_IDLE) {
1062                         ret = -EINVAL;
1063                         goto out;
1064                 }
1065
1066                 if (!Q_EMPTY(qhp->wq.sq_rptr, qhp->wq.sq_wptr) ||
1067                     !Q_EMPTY(qhp->wq.rq_rptr, qhp->wq.rq_wptr)) {
1068                         ret = -EINVAL;
1069                         goto out;
1070                 }
1071                 qhp->attr.state = IWCH_QP_STATE_IDLE;
1072                 memset(&qhp->attr, 0, sizeof(qhp->attr));
1073                 break;
1074         case IWCH_QP_STATE_TERMINATE:
1075                 if (!internal) {
1076                         ret = -EINVAL;
1077                         goto out;
1078                 }
1079                 goto err;
1080                 break;
1081         default:
1082                 printk(KERN_ERR "%s in a bad state %d\n",
1083                        __func__, qhp->attr.state);
1084                 ret = -EINVAL;
1085                 goto err;
1086                 break;
1087         }
1088         goto out;
1089 err:
1090         PDBG("%s disassociating ep %p qpid 0x%x\n", __func__, qhp->ep,
1091              qhp->wq.qpid);
1092
1093         /* disassociate the LLP connection */
1094         qhp->attr.llp_stream_handle = NULL;
1095         ep = qhp->ep;
1096         qhp->ep = NULL;
1097         qhp->attr.state = IWCH_QP_STATE_ERROR;
1098         free=1;
1099         wake_up(&qhp->wait);
1100         BUG_ON(!ep);
1101         flush_qp(qhp, &flag);
1102 out:
1103         spin_unlock_irqrestore(&qhp->lock, flag);
1104
1105         if (terminate)
1106                 iwch_post_terminate(qhp, NULL);
1107
1108         /*
1109          * If disconnect is 1, then we need to initiate a disconnect
1110          * on the EP.  This can be a normal close (RTS->CLOSING) or
1111          * an abnormal close (RTS/CLOSING->ERROR).
1112          */
1113         if (disconnect) {
1114                 iwch_ep_disconnect(ep, abort, GFP_KERNEL);
1115                 put_ep(&ep->com);
1116         }
1117
1118         /*
1119          * If free is 1, then we've disassociated the EP from the QP
1120          * and we need to dereference the EP.
1121          */
1122         if (free)
1123                 put_ep(&ep->com);
1124
1125         PDBG("%s exit state %d\n", __func__, qhp->attr.state);
1126         return ret;
1127 }
1128
1129 static int quiesce_qp(struct iwch_qp *qhp)
1130 {
1131         spin_lock_irq(&qhp->lock);
1132         iwch_quiesce_tid(qhp->ep);
1133         qhp->flags |= QP_QUIESCED;
1134         spin_unlock_irq(&qhp->lock);
1135         return 0;
1136 }
1137
1138 static int resume_qp(struct iwch_qp *qhp)
1139 {
1140         spin_lock_irq(&qhp->lock);
1141         iwch_resume_tid(qhp->ep);
1142         qhp->flags &= ~QP_QUIESCED;
1143         spin_unlock_irq(&qhp->lock);
1144         return 0;
1145 }
1146
1147 int iwch_quiesce_qps(struct iwch_cq *chp)
1148 {
1149         int i;
1150         struct iwch_qp *qhp;
1151
1152         for (i=0; i < T3_MAX_NUM_QP; i++) {
1153                 qhp = get_qhp(chp->rhp, i);
1154                 if (!qhp)
1155                         continue;
1156                 if ((qhp->attr.rcq == chp->cq.cqid) && !qp_quiesced(qhp)) {
1157                         quiesce_qp(qhp);
1158                         continue;
1159                 }
1160                 if ((qhp->attr.scq == chp->cq.cqid) && !qp_quiesced(qhp))
1161                         quiesce_qp(qhp);
1162         }
1163         return 0;
1164 }
1165
1166 int iwch_resume_qps(struct iwch_cq *chp)
1167 {
1168         int i;
1169         struct iwch_qp *qhp;
1170
1171         for (i=0; i < T3_MAX_NUM_QP; i++) {
1172                 qhp = get_qhp(chp->rhp, i);
1173                 if (!qhp)
1174                         continue;
1175                 if ((qhp->attr.rcq == chp->cq.cqid) && qp_quiesced(qhp)) {
1176                         resume_qp(qhp);
1177                         continue;
1178                 }
1179                 if ((qhp->attr.scq == chp->cq.cqid) && qp_quiesced(qhp))
1180                         resume_qp(qhp);
1181         }
1182         return 0;
1183 }