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 inline 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->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 inline 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->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 inline 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 inline int iwch_sgl2pbl_map(struct iwch_dev *rhp,
 162                                    struct ib_sge *sg_list, u32 num_sgle,
 163                                    u32 * pbl_addr, u8 * page_size)
 164 {
 165         int i;
 166         struct iwch_mr *mhp;
 167         u32 offset;
 168         for (i = 0; i < num_sgle; i++) {
 169
 170                 mhp = get_mhp(rhp, (sg_list[i].lkey) >> 8);
 171                 if (!mhp) {
 172                         PDBG("%s %d\n", __FUNCTION__, __LINE__);
 173                         return -EIO;
 174                 }
 175                 if (!mhp->attr.state) {
 176                         PDBG("%s %d\n", __FUNCTION__, __LINE__);
 177                         return -EIO;
 178                 }
 179                 if (mhp->attr.zbva) {
 180                         PDBG("%s %d\n", __FUNCTION__, __LINE__);
 181                         return -EIO;
 182                 }
 183
 184                 if (sg_list[i].addr < mhp->attr.va_fbo) {
 185                         PDBG("%s %d\n", __FUNCTION__, __LINE__);
 186                         return -EINVAL;
 187                 }
 188                 if (sg_list[i].addr + ((u64) sg_list[i].length) <
 189                     sg_list[i].addr) {
 190                         PDBG("%s %d\n", __FUNCTION__, __LINE__);
 191                         return -EINVAL;
 192                 }
 193                 if (sg_list[i].addr + ((u64) sg_list[i].length) >
 194                     mhp->attr.va_fbo + ((u64) mhp->attr.len)) {
 195                         PDBG("%s %d\n", __FUNCTION__, __LINE__);
 196                         return -EINVAL;
 197                 }
 198                 offset = sg_list[i].addr - mhp->attr.va_fbo;
 199                 offset += ((u32) mhp->attr.va_fbo) %
 200                           (1UL << (12 + mhp->attr.page_size));
 201                 pbl_addr[i] = ((mhp->attr.pbl_addr -
 202                                 rhp->rdev.rnic_info.pbl_base) >> 3) +
 203                               (offset >> (12 + mhp->attr.page_size));
 204                 page_size[i] = mhp->attr.page_size;
 205         }
 206         return 0;
 207 }
 208
 209 static inline int iwch_build_rdma_recv(struct iwch_dev *rhp,
 210                                                     union t3_wr *wqe,
 211                                                     struct ib_recv_wr *wr)
 212 {
 213         int i, err = 0;
 214         u32 pbl_addr[4];
 215         u8 page_size[4];
 216         if (wr->num_sge > T3_MAX_SGE)
 217                 return -EINVAL;
 218         err = iwch_sgl2pbl_map(rhp, wr->sg_list, wr->num_sge, pbl_addr,
 219                                page_size);
 220         if (err)
 221                 return err;
 222         wqe->recv.pagesz[0] = page_size[0];
 223         wqe->recv.pagesz[1] = page_size[1];
 224         wqe->recv.pagesz[2] = page_size[2];
 225         wqe->recv.pagesz[3] = page_size[3];
 226         wqe->recv.num_sgle = cpu_to_be32(wr->num_sge);
 227         for (i = 0; i < wr->num_sge; i++) {
 228                 wqe->recv.sgl[i].stag = cpu_to_be32(wr->sg_list[i].lkey);
 229                 wqe->recv.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
 230
 231                 /* to in the WQE == the offset into the page */
 232                 wqe->recv.sgl[i].to = cpu_to_be64(((u32) wr->sg_list[i].addr) %
 233                                 (1UL << (12 + page_size[i])));
 234
 235                 /* pbl_addr is the adapters address in the PBL */
 236                 wqe->recv.pbl_addr[i] = cpu_to_be32(pbl_addr[i]);
 237         }
 238         for (; i < T3_MAX_SGE; i++) {
 239                 wqe->recv.sgl[i].stag = 0;
 240                 wqe->recv.sgl[i].len = 0;
 241                 wqe->recv.sgl[i].to = 0;
 242                 wqe->recv.pbl_addr[i] = 0;
 243         }
 244         return 0;
 245 }
 246
 247 int iwch_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 248                       struct ib_send_wr **bad_wr)
 249 {
 250         int err = 0;
 251         u8 t3_wr_flit_cnt;
 252         enum t3_wr_opcode t3_wr_opcode = 0;
 253         enum t3_wr_flags t3_wr_flags;
 254         struct iwch_qp *qhp;
 255         u32 idx;
 256         union t3_wr *wqe;
 257         u32 num_wrs;
 258         unsigned long flag;
 259         struct t3_swsq *sqp;
 260
 261         qhp = to_iwch_qp(ibqp);
 262         spin_lock_irqsave(&qhp->lock, flag);
 263         if (qhp->attr.state > IWCH_QP_STATE_RTS) {
 264                 spin_unlock_irqrestore(&qhp->lock, flag);
 265                 return -EINVAL;
 266         }
 267         num_wrs = Q_FREECNT(qhp->wq.sq_rptr, qhp->wq.sq_wptr,
 268                   qhp->wq.sq_size_log2);
 269         if (num_wrs <= 0) {
 270                 spin_unlock_irqrestore(&qhp->lock, flag);
 271                 return -ENOMEM;
 272         }
 273         while (wr) {
 274                 if (num_wrs == 0) {
 275                         err = -ENOMEM;
 276                         *bad_wr = wr;
 277                         break;
 278                 }
 279                 idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
 280                 wqe = (union t3_wr *) (qhp->wq.queue + idx);
 281                 t3_wr_flags = 0;
 282                 if (wr->send_flags & IB_SEND_SOLICITED)
 283                         t3_wr_flags |= T3_SOLICITED_EVENT_FLAG;
 284                 if (wr->send_flags & IB_SEND_FENCE)
 285                         t3_wr_flags |= T3_READ_FENCE_FLAG;
 286                 if (wr->send_flags & IB_SEND_SIGNALED)
 287                         t3_wr_flags |= T3_COMPLETION_FLAG;
 288                 sqp = qhp->wq.sq +
 289                       Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2);
 290                 switch (wr->opcode) {
 291                 case IB_WR_SEND:
 292                 case IB_WR_SEND_WITH_IMM:
 293                         t3_wr_opcode = T3_WR_SEND;
 294                         err = iwch_build_rdma_send(wqe, wr, &t3_wr_flit_cnt);
 295                         break;
 296                 case IB_WR_RDMA_WRITE:
 297                 case IB_WR_RDMA_WRITE_WITH_IMM:
 298                         t3_wr_opcode = T3_WR_WRITE;
 299                         err = iwch_build_rdma_write(wqe, wr, &t3_wr_flit_cnt);
 300                         break;
 301                 case IB_WR_RDMA_READ:
 302                         t3_wr_opcode = T3_WR_READ;
 303                         t3_wr_flags = 0; /* T3 reads are always signaled */
 304                         err = iwch_build_rdma_read(wqe, wr, &t3_wr_flit_cnt);
 305                         if (err)
 306                                 break;
 307                         sqp->read_len = wqe->read.local_len;
 308                         if (!qhp->wq.oldest_read)
 309                                 qhp->wq.oldest_read = sqp;
 310                         break;
 311                 default:
 312                         PDBG("%s post of type=%d TBD!\n", __FUNCTION__,
 313                              wr->opcode);
 314                         err = -EINVAL;
 315                 }
 316                 if (err) {
 317                         *bad_wr = wr;
 318                         break;
 319                 }
 320                 wqe->send.wrid.id0.hi = qhp->wq.sq_wptr;
 321                 sqp->wr_id = wr->wr_id;
 322                 sqp->opcode = wr2opcode(t3_wr_opcode);
 323                 sqp->sq_wptr = qhp->wq.sq_wptr;
 324                 sqp->complete = 0;
 325                 sqp->signaled = (wr->send_flags & IB_SEND_SIGNALED);
 326
 327                 build_fw_riwrh((void *) wqe, t3_wr_opcode, t3_wr_flags,
 328                                Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2),
 329                                0, t3_wr_flit_cnt);
 330                 PDBG("%s cookie 0x%llx wq idx 0x%x swsq idx %ld opcode %d\n",
 331                      __FUNCTION__, (unsigned long long) wr->wr_id, idx,
 332                      Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2),
 333                      sqp->opcode);
 334                 wr = wr->next;
 335                 num_wrs--;
 336                 ++(qhp->wq.wptr);
 337                 ++(qhp->wq.sq_wptr);
 338         }
 339         spin_unlock_irqrestore(&qhp->lock, flag);
 340         ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
 341         return err;
 342 }
 343
 344 int iwch_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 345                       struct ib_recv_wr **bad_wr)
 346 {
 347         int err = 0;
 348         struct iwch_qp *qhp;
 349         u32 idx;
 350         union t3_wr *wqe;
 351         u32 num_wrs;
 352         unsigned long flag;
 353
 354         qhp = to_iwch_qp(ibqp);
 355         spin_lock_irqsave(&qhp->lock, flag);
 356         if (qhp->attr.state > IWCH_QP_STATE_RTS) {
 357                 spin_unlock_irqrestore(&qhp->lock, flag);
 358                 return -EINVAL;
 359         }
 360         num_wrs = Q_FREECNT(qhp->wq.rq_rptr, qhp->wq.rq_wptr,
 361                             qhp->wq.rq_size_log2) - 1;
 362         if (!wr) {
 363                 spin_unlock_irqrestore(&qhp->lock, flag);
 364                 return -EINVAL;
 365         }
 366         while (wr) {
 367                 idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
 368                 wqe = (union t3_wr *) (qhp->wq.queue + idx);
 369                 if (num_wrs)
 370                         err = iwch_build_rdma_recv(qhp->rhp, wqe, wr);
 371                 else
 372                         err = -ENOMEM;
 373                 if (err) {
 374                         *bad_wr = wr;
 375                         break;
 376                 }
 377                 qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr, qhp->wq.rq_size_log2)] =
 378                         wr->wr_id;
 379                 build_fw_riwrh((void *) wqe, T3_WR_RCV, T3_COMPLETION_FLAG,
 380                                Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2),
 381                                0, sizeof(struct t3_receive_wr) >> 3);
 382                 PDBG("%s cookie 0x%llx idx 0x%x rq_wptr 0x%x rw_rptr 0x%x "
 383                      "wqe %p \n", __FUNCTION__, (unsigned long long) wr->wr_id,
 384                      idx, qhp->wq.rq_wptr, qhp->wq.rq_rptr, wqe);
 385                 ++(qhp->wq.rq_wptr);
 386                 ++(qhp->wq.wptr);
 387                 wr = wr->next;
 388                 num_wrs--;
 389         }
 390         spin_unlock_irqrestore(&qhp->lock, flag);
 391         ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
 392         return err;
 393 }
 394
 395 int iwch_bind_mw(struct ib_qp *qp,
 396                              struct ib_mw *mw,
 397                              struct ib_mw_bind *mw_bind)
 398 {
 399         struct iwch_dev *rhp;
 400         struct iwch_mw *mhp;
 401         struct iwch_qp *qhp;
 402         union t3_wr *wqe;
 403         u32 pbl_addr;
 404         u8 page_size;
 405         u32 num_wrs;
 406         unsigned long flag;
 407         struct ib_sge sgl;
 408         int err=0;
 409         enum t3_wr_flags t3_wr_flags;
 410         u32 idx;
 411         struct t3_swsq *sqp;
 412
 413         qhp = to_iwch_qp(qp);
 414         mhp = to_iwch_mw(mw);
 415         rhp = qhp->rhp;
 416
 417         spin_lock_irqsave(&qhp->lock, flag);
 418         if (qhp->attr.state > IWCH_QP_STATE_RTS) {
 419                 spin_unlock_irqrestore(&qhp->lock, flag);
 420                 return -EINVAL;
 421         }
 422         num_wrs = Q_FREECNT(qhp->wq.sq_rptr, qhp->wq.sq_wptr,
 423                             qhp->wq.sq_size_log2);
 424         if ((num_wrs) <= 0) {
 425                 spin_unlock_irqrestore(&qhp->lock, flag);
 426                 return -ENOMEM;
 427         }
 428         idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
 429         PDBG("%s: idx 0x%0x, mw 0x%p, mw_bind 0x%p\n", __FUNCTION__, idx,
 430              mw, mw_bind);
 431         wqe = (union t3_wr *) (qhp->wq.queue + idx);
 432
 433         t3_wr_flags = 0;
 434         if (mw_bind->send_flags & IB_SEND_SIGNALED)
 435                 t3_wr_flags = T3_COMPLETION_FLAG;
 436
 437         sgl.addr = mw_bind->addr;
 438         sgl.lkey = mw_bind->mr->lkey;
 439         sgl.length = mw_bind->length;
 440         wqe->bind.reserved = 0;
 441         wqe->bind.type = T3_VA_BASED_TO;
 442
 443         /* TBD: check perms */
 444         wqe->bind.perms = iwch_convert_access(mw_bind->mw_access_flags);
 445         wqe->bind.mr_stag = cpu_to_be32(mw_bind->mr->lkey);
 446         wqe->bind.mw_stag = cpu_to_be32(mw->rkey);
 447         wqe->bind.mw_len = cpu_to_be32(mw_bind->length);
 448         wqe->bind.mw_va = cpu_to_be64(mw_bind->addr);
 449         err = iwch_sgl2pbl_map(rhp, &sgl, 1, &pbl_addr, &page_size);
 450         if (err) {
 451                 spin_unlock_irqrestore(&qhp->lock, flag);
 452                 return err;
 453         }
 454         wqe->send.wrid.id0.hi = qhp->wq.sq_wptr;
 455         sqp = qhp->wq.sq + Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2);
 456         sqp->wr_id = mw_bind->wr_id;
 457         sqp->opcode = T3_BIND_MW;
 458         sqp->sq_wptr = qhp->wq.sq_wptr;
 459         sqp->complete = 0;
 460         sqp->signaled = (mw_bind->send_flags & IB_SEND_SIGNALED);
 461         wqe->bind.mr_pbl_addr = cpu_to_be32(pbl_addr);
 462         wqe->bind.mr_pagesz = page_size;
 463         wqe->flit[T3_SQ_COOKIE_FLIT] = mw_bind->wr_id;
 464         build_fw_riwrh((void *)wqe, T3_WR_BIND, t3_wr_flags,
 465                        Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2), 0,
 466                                 sizeof(struct t3_bind_mw_wr) >> 3);
 467         ++(qhp->wq.wptr);
 468         ++(qhp->wq.sq_wptr);
 469         spin_unlock_irqrestore(&qhp->lock, flag);
 470
 471         ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
 472
 473         return err;
 474 }
 475
 476 static inline void build_term_codes(int t3err, u8 *layer_type, u8 *ecode,
 477                                     int tagged)
 478 {
 479         switch (t3err) {
 480         case TPT_ERR_STAG:
 481                 if (tagged == 1) {
 482                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 483                         *ecode = DDPT_INV_STAG;
 484                 } else if (tagged == 2) {
 485                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 486                         *ecode = RDMAP_INV_STAG;
 487                 }
 488                 break;
 489         case TPT_ERR_PDID:
 490         case TPT_ERR_QPID:
 491         case TPT_ERR_ACCESS:
 492                 if (tagged == 1) {
 493                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 494                         *ecode = DDPT_STAG_NOT_ASSOC;
 495                 } else if (tagged == 2) {
 496                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 497                         *ecode = RDMAP_STAG_NOT_ASSOC;
 498                 }
 499                 break;
 500         case TPT_ERR_WRAP:
 501                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 502                 *ecode = RDMAP_TO_WRAP;
 503                 break;
 504         case TPT_ERR_BOUND:
 505                 if (tagged == 1) {
 506                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 507                         *ecode = DDPT_BASE_BOUNDS;
 508                 } else if (tagged == 2) {
 509                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 510                         *ecode = RDMAP_BASE_BOUNDS;
 511                 } else {
 512                         *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 513                         *ecode = DDPU_MSG_TOOBIG;
 514                 }
 515                 break;
 516         case TPT_ERR_INVALIDATE_SHARED_MR:
 517         case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
 518                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 519                 *ecode = RDMAP_CANT_INV_STAG;
 520                 break;
 521         case TPT_ERR_ECC:
 522         case TPT_ERR_ECC_PSTAG:
 523         case TPT_ERR_INTERNAL_ERR:
 524                 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA;
 525                 *ecode = 0;
 526                 break;
 527         case TPT_ERR_OUT_OF_RQE:
 528                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 529                 *ecode = DDPU_INV_MSN_NOBUF;
 530                 break;
 531         case TPT_ERR_PBL_ADDR_BOUND:
 532                 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 533                 *ecode = DDPT_BASE_BOUNDS;
 534                 break;
 535         case TPT_ERR_CRC:
 536                 *layer_type = LAYER_MPA|DDP_LLP;
 537                 *ecode = MPA_CRC_ERR;
 538                 break;
 539         case TPT_ERR_MARKER:
 540                 *layer_type = LAYER_MPA|DDP_LLP;
 541                 *ecode = MPA_MARKER_ERR;
 542                 break;
 543         case TPT_ERR_PDU_LEN_ERR:
 544                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 545                 *ecode = DDPU_MSG_TOOBIG;
 546                 break;
 547         case TPT_ERR_DDP_VERSION:
 548                 if (tagged) {
 549                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 550                         *ecode = DDPT_INV_VERS;
 551                 } else {
 552                         *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 553                         *ecode = DDPU_INV_VERS;
 554                 }
 555                 break;
 556         case TPT_ERR_RDMA_VERSION:
 557                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 558                 *ecode = RDMAP_INV_VERS;
 559                 break;
 560         case TPT_ERR_OPCODE:
 561                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 562                 *ecode = RDMAP_INV_OPCODE;
 563                 break;
 564         case TPT_ERR_DDP_QUEUE_NUM:
 565                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 566                 *ecode = DDPU_INV_QN;
 567                 break;
 568         case TPT_ERR_MSN:
 569         case TPT_ERR_MSN_GAP:
 570         case TPT_ERR_MSN_RANGE:
 571         case TPT_ERR_IRD_OVERFLOW:
 572                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 573                 *ecode = DDPU_INV_MSN_RANGE;
 574                 break;
 575         case TPT_ERR_TBIT:
 576                 *layer_type = LAYER_DDP|DDP_LOCAL_CATA;
 577                 *ecode = 0;
 578                 break;
 579         case TPT_ERR_MO:
 580                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
 581                 *ecode = DDPU_INV_MO;
 582                 break;
 583         default:
 584                 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
 585                 *ecode = 0;
 586                 break;
 587         }
 588 }
 589
 590 /*
 591  * This posts a TERMINATE with layer=RDMA, type=catastrophic.
 592  */
 593 int iwch_post_terminate(struct iwch_qp *qhp, struct respQ_msg_t *rsp_msg)
 594 {
 595         union t3_wr *wqe;
 596         struct terminate_message *term;
 597         int status;
 598         int tagged = 0;
 599         struct sk_buff *skb;
 600
 601         PDBG("%s %d\n", __FUNCTION__, __LINE__);
 602         skb = alloc_skb(40, GFP_ATOMIC);
 603         if (!skb) {
 604                 printk(KERN_ERR "%s cannot send TERMINATE!\n", __FUNCTION__);
 605                 return -ENOMEM;
 606         }
 607         wqe = (union t3_wr *)skb_put(skb, 40);
 608         memset(wqe, 0, 40);
 609         wqe->send.rdmaop = T3_TERMINATE;
 610
 611         /* immediate data length */
 612         wqe->send.plen = htonl(4);
 613
 614         /* immediate data starts here. */
 615         term = (struct terminate_message *)wqe->send.sgl;
 616         if (rsp_msg) {
 617                 status = CQE_STATUS(rsp_msg->cqe);
 618                 if (CQE_OPCODE(rsp_msg->cqe) == T3_RDMA_WRITE)
 619                         tagged = 1;
 620                 if ((CQE_OPCODE(rsp_msg->cqe) == T3_READ_REQ) ||
 621                     (CQE_OPCODE(rsp_msg->cqe) == T3_READ_RESP))
 622                         tagged = 2;
 623         } else {
 624                 status = TPT_ERR_INTERNAL_ERR;
 625         }
 626         build_term_codes(status, &term->layer_etype, &term->ecode, tagged);
 627         build_fw_riwrh((void *)wqe, T3_WR_SEND,
 628                        T3_COMPLETION_FLAG | T3_NOTIFY_FLAG, 1,
 629                        qhp->ep->hwtid, 5);
 630         skb->priority = CPL_PRIORITY_DATA;
 631         return cxgb3_ofld_send(qhp->rhp->rdev.t3cdev_p, skb);
 632 }
 633
 634 /*
 635  * Assumes qhp lock is held.
 636  */
 637 static void __flush_qp(struct iwch_qp *qhp, unsigned long *flag)
 638 {
 639         struct iwch_cq *rchp, *schp;
 640         int count;
 641
 642         rchp = get_chp(qhp->rhp, qhp->attr.rcq);
 643         schp = get_chp(qhp->rhp, qhp->attr.scq);
 644
 645         PDBG("%s qhp %p rchp %p schp %p\n", __FUNCTION__, qhp, rchp, schp);
 646         /* take a ref on the qhp since we must release the lock */
 647         atomic_inc(&qhp->refcnt);
 648         spin_unlock_irqrestore(&qhp->lock, *flag);
 649
 650         /* locking heirarchy: cq lock first, then qp lock. */
 651         spin_lock_irqsave(&rchp->lock, *flag);
 652         spin_lock(&qhp->lock);
 653         cxio_flush_hw_cq(&rchp->cq);
 654         cxio_count_rcqes(&rchp->cq, &qhp->wq, &count);
 655         cxio_flush_rq(&qhp->wq, &rchp->cq, count);
 656         spin_unlock(&qhp->lock);
 657         spin_unlock_irqrestore(&rchp->lock, *flag);
 658
 659         /* locking heirarchy: cq lock first, then qp lock. */
 660         spin_lock_irqsave(&schp->lock, *flag);
 661         spin_lock(&qhp->lock);
 662         cxio_flush_hw_cq(&schp->cq);
 663         cxio_count_scqes(&schp->cq, &qhp->wq, &count);
 664         cxio_flush_sq(&qhp->wq, &schp->cq, count);
 665         spin_unlock(&qhp->lock);
 666         spin_unlock_irqrestore(&schp->lock, *flag);
 667
 668         /* deref */
 669         if (atomic_dec_and_test(&qhp->refcnt))
 670                 wake_up(&qhp->wait);
 671
 672         spin_lock_irqsave(&qhp->lock, *flag);
 673 }
 674
 675 static inline void flush_qp(struct iwch_qp *qhp, unsigned long *flag)
 676 {
 677         if (t3b_device(qhp->rhp))
 678                 cxio_set_wq_in_error(&qhp->wq);
 679         else
 680                 __flush_qp(qhp, flag);
 681 }
 682
 683
 684 /*
 685  * Return non zero if at least one RECV was pre-posted.
 686  */
 687 static inline int rqes_posted(struct iwch_qp *qhp)
 688 {
 689         return fw_riwrh_opcode((struct fw_riwrh *)qhp->wq.queue) == T3_WR_RCV;
 690 }
 691
 692 static int rdma_init(struct iwch_dev *rhp, struct iwch_qp *qhp,
 693                                 enum iwch_qp_attr_mask mask,
 694                                 struct iwch_qp_attributes *attrs)
 695 {
 696         struct t3_rdma_init_attr init_attr;
 697         int ret;
 698
 699         init_attr.tid = qhp->ep->hwtid;
 700         init_attr.qpid = qhp->wq.qpid;
 701         init_attr.pdid = qhp->attr.pd;
 702         init_attr.scqid = qhp->attr.scq;
 703         init_attr.rcqid = qhp->attr.rcq;
 704         init_attr.rq_addr = qhp->wq.rq_addr;
 705         init_attr.rq_size = 1 << qhp->wq.rq_size_log2;
 706         init_attr.mpaattrs = uP_RI_MPA_IETF_ENABLE |
 707                 qhp->attr.mpa_attr.recv_marker_enabled |
 708                 (qhp->attr.mpa_attr.xmit_marker_enabled << 1) |
 709                 (qhp->attr.mpa_attr.crc_enabled << 2);
 710
 711         /*
 712          * XXX - The IWCM doesn't quite handle getting these
 713          * attrs set before going into RTS.  For now, just turn
 714          * them on always...
 715          */
 716 #if 0
 717         init_attr.qpcaps = qhp->attr.enableRdmaRead |
 718                 (qhp->attr.enableRdmaWrite << 1) |
 719                 (qhp->attr.enableBind << 2) |
 720                 (qhp->attr.enable_stag0_fastreg << 3) |
 721                 (qhp->attr.enable_stag0_fastreg << 4);
 722 #else
 723         init_attr.qpcaps = 0x1f;
 724 #endif
 725         init_attr.tcp_emss = qhp->ep->emss;
 726         init_attr.ord = qhp->attr.max_ord;
 727         init_attr.ird = qhp->attr.max_ird;
 728         init_attr.qp_dma_addr = qhp->wq.dma_addr;
 729         init_attr.qp_dma_size = (1UL << qhp->wq.size_log2);
 730         init_attr.flags = rqes_posted(qhp) ? RECVS_POSTED : 0;
 731         PDBG("%s init_attr.rq_addr 0x%x init_attr.rq_size = %d "
 732              "flags 0x%x qpcaps 0x%x\n", __FUNCTION__,
 733              init_attr.rq_addr, init_attr.rq_size,
 734              init_attr.flags, init_attr.qpcaps);
 735         ret = cxio_rdma_init(&rhp->rdev, &init_attr);
 736         PDBG("%s ret %d\n", __FUNCTION__, ret);
 737         return ret;
 738 }
 739
 740 int iwch_modify_qp(struct iwch_dev *rhp, struct iwch_qp *qhp,
 741                                 enum iwch_qp_attr_mask mask,
 742                                 struct iwch_qp_attributes *attrs,
 743                                 int internal)
 744 {
 745         int ret = 0;
 746         struct iwch_qp_attributes newattr = qhp->attr;
 747         unsigned long flag;
 748         int disconnect = 0;
 749         int terminate = 0;
 750         int abort = 0;
 751         int free = 0;
 752         struct iwch_ep *ep = NULL;
 753
 754         PDBG("%s qhp %p qpid 0x%x ep %p state %d -> %d\n", __FUNCTION__,
 755              qhp, qhp->wq.qpid, qhp->ep, qhp->attr.state,
 756              (mask & IWCH_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1);
 757
 758         spin_lock_irqsave(&qhp->lock, flag);
 759
 760         /* Process attr changes if in IDLE */
 761         if (mask & IWCH_QP_ATTR_VALID_MODIFY) {
 762                 if (qhp->attr.state != IWCH_QP_STATE_IDLE) {
 763                         ret = -EIO;
 764                         goto out;
 765                 }
 766                 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_READ)
 767                         newattr.enable_rdma_read = attrs->enable_rdma_read;
 768                 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_WRITE)
 769                         newattr.enable_rdma_write = attrs->enable_rdma_write;
 770                 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_BIND)
 771                         newattr.enable_bind = attrs->enable_bind;
 772                 if (mask & IWCH_QP_ATTR_MAX_ORD) {
 773                         if (attrs->max_ord >
 774                             rhp->attr.max_rdma_read_qp_depth) {
 775                                 ret = -EINVAL;
 776                                 goto out;
 777                         }
 778                         newattr.max_ord = attrs->max_ord;
 779                 }
 780                 if (mask & IWCH_QP_ATTR_MAX_IRD) {
 781                         if (attrs->max_ird >
 782                             rhp->attr.max_rdma_reads_per_qp) {
 783                                 ret = -EINVAL;
 784                                 goto out;
 785                         }
 786                         newattr.max_ird = attrs->max_ird;
 787                 }
 788                 qhp->attr = newattr;
 789         }
 790
 791         if (!(mask & IWCH_QP_ATTR_NEXT_STATE))
 792                 goto out;
 793         if (qhp->attr.state == attrs->next_state)
 794                 goto out;
 795
 796         switch (qhp->attr.state) {
 797         case IWCH_QP_STATE_IDLE:
 798                 switch (attrs->next_state) {
 799                 case IWCH_QP_STATE_RTS:
 800                         if (!(mask & IWCH_QP_ATTR_LLP_STREAM_HANDLE)) {
 801                                 ret = -EINVAL;
 802                                 goto out;
 803                         }
 804                         if (!(mask & IWCH_QP_ATTR_MPA_ATTR)) {
 805                                 ret = -EINVAL;
 806                                 goto out;
 807                         }
 808                         qhp->attr.mpa_attr = attrs->mpa_attr;
 809                         qhp->attr.llp_stream_handle = attrs->llp_stream_handle;
 810                         qhp->ep = qhp->attr.llp_stream_handle;
 811                         qhp->attr.state = IWCH_QP_STATE_RTS;
 812
 813                         /*
 814                          * Ref the endpoint here and deref when we
 815                          * disassociate the endpoint from the QP.  This
 816                          * happens in CLOSING->IDLE transition or *->ERROR
 817                          * transition.
 818                          */
 819                         get_ep(&qhp->ep->com);
 820                         spin_unlock_irqrestore(&qhp->lock, flag);
 821                         ret = rdma_init(rhp, qhp, mask, attrs);
 822                         spin_lock_irqsave(&qhp->lock, flag);
 823                         if (ret)
 824                                 goto err;
 825                         break;
 826                 case IWCH_QP_STATE_ERROR:
 827                         qhp->attr.state = IWCH_QP_STATE_ERROR;
 828                         flush_qp(qhp, &flag);
 829                         break;
 830                 default:
 831                         ret = -EINVAL;
 832                         goto out;
 833                 }
 834                 break;
 835         case IWCH_QP_STATE_RTS:
 836                 switch (attrs->next_state) {
 837                 case IWCH_QP_STATE_CLOSING:
 838                         BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2);
 839                         qhp->attr.state = IWCH_QP_STATE_CLOSING;
 840                         if (!internal) {
 841                                 abort=0;
 842                                 disconnect = 1;
 843                                 ep = qhp->ep;
 844                         }
 845                         break;
 846                 case IWCH_QP_STATE_TERMINATE:
 847                         qhp->attr.state = IWCH_QP_STATE_TERMINATE;
 848                         if (t3b_device(qhp->rhp))
 849                                 cxio_set_wq_in_error(&qhp->wq);
 850                         if (!internal)
 851                                 terminate = 1;
 852                         break;
 853                 case IWCH_QP_STATE_ERROR:
 854                         qhp->attr.state = IWCH_QP_STATE_ERROR;
 855                         if (!internal) {
 856                                 abort=1;
 857                                 disconnect = 1;
 858                                 ep = qhp->ep;
 859                         }
 860                         goto err;
 861                         break;
 862                 default:
 863                         ret = -EINVAL;
 864                         goto out;
 865                 }
 866                 break;
 867         case IWCH_QP_STATE_CLOSING:
 868                 if (!internal) {
 869                         ret = -EINVAL;
 870                         goto out;
 871                 }
 872                 switch (attrs->next_state) {
 873                         case IWCH_QP_STATE_IDLE:
 874                                 qhp->attr.state = IWCH_QP_STATE_IDLE;
 875                                 qhp->attr.llp_stream_handle = NULL;
 876                                 put_ep(&qhp->ep->com);
 877                                 qhp->ep = NULL;
 878                                 wake_up(&qhp->wait);
 879                                 break;
 880                         case IWCH_QP_STATE_ERROR:
 881                                 goto err;
 882                         default:
 883                                 ret = -EINVAL;
 884                                 goto err;
 885                 }
 886                 break;
 887         case IWCH_QP_STATE_ERROR:
 888                 if (attrs->next_state != IWCH_QP_STATE_IDLE) {
 889                         ret = -EINVAL;
 890                         goto out;
 891                 }
 892
 893                 if (!Q_EMPTY(qhp->wq.sq_rptr, qhp->wq.sq_wptr) ||
 894                     !Q_EMPTY(qhp->wq.rq_rptr, qhp->wq.rq_wptr)) {
 895                         ret = -EINVAL;
 896                         goto out;
 897                 }
 898                 qhp->attr.state = IWCH_QP_STATE_IDLE;
 899                 memset(&qhp->attr, 0, sizeof(qhp->attr));
 900                 break;
 901         case IWCH_QP_STATE_TERMINATE:
 902                 if (!internal) {
 903                         ret = -EINVAL;
 904                         goto out;
 905                 }
 906                 goto err;
 907                 break;
 908         default:
 909                 printk(KERN_ERR "%s in a bad state %d\n",
 910                        __FUNCTION__, qhp->attr.state);
 911                 ret = -EINVAL;
 912                 goto err;
 913                 break;
 914         }
 915         goto out;
 916 err:
 917         PDBG("%s disassociating ep %p qpid 0x%x\n", __FUNCTION__, qhp->ep,
 918              qhp->wq.qpid);
 919
 920         /* disassociate the LLP connection */
 921         qhp->attr.llp_stream_handle = NULL;
 922         ep = qhp->ep;
 923         qhp->ep = NULL;
 924         qhp->attr.state = IWCH_QP_STATE_ERROR;
 925         free=1;
 926         wake_up(&qhp->wait);
 927         BUG_ON(!ep);
 928         flush_qp(qhp, &flag);
 929 out:
 930         spin_unlock_irqrestore(&qhp->lock, flag);
 931
 932         if (terminate)
 933                 iwch_post_terminate(qhp, NULL);
 934
 935         /*
 936          * If disconnect is 1, then we need to initiate a disconnect
 937          * on the EP.  This can be a normal close (RTS->CLOSING) or
 938          * an abnormal close (RTS/CLOSING->ERROR).
 939          */
 940         if (disconnect)
 941                 iwch_ep_disconnect(ep, abort, GFP_KERNEL);
 942
 943         /*
 944          * If free is 1, then we've disassociated the EP from the QP
 945          * and we need to dereference the EP.
 946          */
 947         if (free)
 948                 put_ep(&ep->com);
 949
 950         PDBG("%s exit state %d\n", __FUNCTION__, qhp->attr.state);
 951         return ret;
 952 }
 953
 954 static int quiesce_qp(struct iwch_qp *qhp)
 955 {
 956         spin_lock_irq(&qhp->lock);
 957         iwch_quiesce_tid(qhp->ep);
 958         qhp->flags |= QP_QUIESCED;
 959         spin_unlock_irq(&qhp->lock);
 960         return 0;
 961 }
 962
 963 static int resume_qp(struct iwch_qp *qhp)
 964 {
 965         spin_lock_irq(&qhp->lock);
 966         iwch_resume_tid(qhp->ep);
 967         qhp->flags &= ~QP_QUIESCED;
 968         spin_unlock_irq(&qhp->lock);
 969         return 0;
 970 }
 971
 972 int iwch_quiesce_qps(struct iwch_cq *chp)
 973 {
 974         int i;
 975         struct iwch_qp *qhp;
 976
 977         for (i=0; i < T3_MAX_NUM_QP; i++) {
 978                 qhp = get_qhp(chp->rhp, i);
 979                 if (!qhp)
 980                         continue;
 981                 if ((qhp->attr.rcq == chp->cq.cqid) && !qp_quiesced(qhp)) {
 982                         quiesce_qp(qhp);
 983                         continue;
 984                 }
 985                 if ((qhp->attr.scq == chp->cq.cqid) && !qp_quiesced(qhp))
 986                         quiesce_qp(qhp);
 987         }
 988         return 0;
 989 }
 990
 991 int iwch_resume_qps(struct iwch_cq *chp)
 992 {
 993         int i;
 994         struct iwch_qp *qhp;
 995
 996         for (i=0; i < T3_MAX_NUM_QP; i++) {
 997                 qhp = get_qhp(chp->rhp, i);
 998                 if (!qhp)
 999                         continue;
1000                 if ((qhp->attr.rcq == chp->cq.cqid) && qp_quiesced(qhp)) {
1001                         resume_qp(qhp);
1002                         continue;
1003                 }
1004                 if ((qhp->attr.scq == chp->cq.cqid) && qp_quiesced(qhp))
1005                         resume_qp(qhp);
1006         }
1007         return 0;
1008 }