drivers/infiniband/hw/cxgb4/qp.c

   1 /*
   2  * Copyright (c) 2009-2010 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
  33 #include <linux/module.h>
  34
  35 #include "iw_cxgb4.h"
  36
  37 static int db_delay_usecs = 1;
  38 module_param(db_delay_usecs, int, 0644);
  39 MODULE_PARM_DESC(db_delay_usecs, "Usecs to delay awaiting db fifo to drain");
  40
  41 static int ocqp_support = 1;
  42 module_param(ocqp_support, int, 0644);
  43 MODULE_PARM_DESC(ocqp_support, "Support on-chip SQs (default=1)");
  44
  45 int db_fc_threshold = 1000;
  46 module_param(db_fc_threshold, int, 0644);
  47 MODULE_PARM_DESC(db_fc_threshold,
  48                  "QP count/threshold that triggers"
  49                  " automatic db flow control mode (default = 1000)");
  50
  51 int db_coalescing_threshold;
  52 module_param(db_coalescing_threshold, int, 0644);
  53 MODULE_PARM_DESC(db_coalescing_threshold,
  54                  "QP count/threshold that triggers"
  55                  " disabling db coalescing (default = 0)");
  56
  57 static int max_fr_immd = T4_MAX_FR_IMMD;
  58 module_param(max_fr_immd, int, 0644);
  59 MODULE_PARM_DESC(max_fr_immd, "fastreg threshold for using DSGL instead of immedate");
  60
  61 static int alloc_ird(struct c4iw_dev *dev, u32 ird)
  62 {
  63         int ret = 0;
  64
  65         spin_lock_irq(&dev->lock);
  66         if (ird <= dev->avail_ird)
  67                 dev->avail_ird -= ird;
  68         else
  69                 ret = -ENOMEM;
  70         spin_unlock_irq(&dev->lock);
  71
  72         if (ret)
  73                 dev_warn(&dev->rdev.lldi.pdev->dev,
  74                          "device IRD resources exhausted\n");
  75
  76         return ret;
  77 }
  78
  79 static void free_ird(struct c4iw_dev *dev, int ird)
  80 {
  81         spin_lock_irq(&dev->lock);
  82         dev->avail_ird += ird;
  83         spin_unlock_irq(&dev->lock);
  84 }
  85
  86 static void set_state(struct c4iw_qp *qhp, enum c4iw_qp_state state)
  87 {
  88         unsigned long flag;
  89         spin_lock_irqsave(&qhp->lock, flag);
  90         qhp->attr.state = state;
  91         spin_unlock_irqrestore(&qhp->lock, flag);
  92 }
  93
  94 static void dealloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq)
  95 {
  96         c4iw_ocqp_pool_free(rdev, sq->dma_addr, sq->memsize);
  97 }
  98
  99 static void dealloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq)
 100 {
 101         dma_free_coherent(&(rdev->lldi.pdev->dev), sq->memsize, sq->queue,
 102                           pci_unmap_addr(sq, mapping));
 103 }
 104
 105 static void dealloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq)
 106 {
 107         if (t4_sq_onchip(sq))
 108                 dealloc_oc_sq(rdev, sq);
 109         else
 110                 dealloc_host_sq(rdev, sq);
 111 }
 112
 113 static int alloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq)
 114 {
 115         if (!ocqp_support || !ocqp_supported(&rdev->lldi))
 116                 return -ENOSYS;
 117         sq->dma_addr = c4iw_ocqp_pool_alloc(rdev, sq->memsize);
 118         if (!sq->dma_addr)
 119                 return -ENOMEM;
 120         sq->phys_addr = rdev->oc_mw_pa + sq->dma_addr -
 121                         rdev->lldi.vr->ocq.start;
 122         sq->queue = (__force union t4_wr *)(rdev->oc_mw_kva + sq->dma_addr -
 123                                             rdev->lldi.vr->ocq.start);
 124         sq->flags |= T4_SQ_ONCHIP;
 125         return 0;
 126 }
 127
 128 static int alloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq)
 129 {
 130         sq->queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev), sq->memsize,
 131                                        &(sq->dma_addr), GFP_KERNEL);
 132         if (!sq->queue)
 133                 return -ENOMEM;
 134         sq->phys_addr = virt_to_phys(sq->queue);
 135         pci_unmap_addr_set(sq, mapping, sq->dma_addr);
 136         return 0;
 137 }
 138
 139 static int alloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq, int user)
 140 {
 141         int ret = -ENOSYS;
 142         if (user)
 143                 ret = alloc_oc_sq(rdev, sq);
 144         if (ret)
 145                 ret = alloc_host_sq(rdev, sq);
 146         return ret;
 147 }
 148
 149 static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
 150                       struct c4iw_dev_ucontext *uctx)
 151 {
 152         /*
 153          * uP clears EQ contexts when the connection exits rdma mode,
 154          * so no need to post a RESET WR for these EQs.
 155          */
 156         dma_free_coherent(&(rdev->lldi.pdev->dev),
 157                           wq->rq.memsize, wq->rq.queue,
 158                           dma_unmap_addr(&wq->rq, mapping));
 159         dealloc_sq(rdev, &wq->sq);
 160         c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
 161         kfree(wq->rq.sw_rq);
 162         kfree(wq->sq.sw_sq);
 163         c4iw_put_qpid(rdev, wq->rq.qid, uctx);
 164         c4iw_put_qpid(rdev, wq->sq.qid, uctx);
 165         return 0;
 166 }
 167
 168 static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
 169                      struct t4_cq *rcq, struct t4_cq *scq,
 170                      struct c4iw_dev_ucontext *uctx)
 171 {
 172         int user = (uctx != &rdev->uctx);
 173         struct fw_ri_res_wr *res_wr;
 174         struct fw_ri_res *res;
 175         int wr_len;
 176         struct c4iw_wr_wait wr_wait;
 177         struct sk_buff *skb;
 178         int ret = 0;
 179         int eqsize;
 180
 181         wq->sq.qid = c4iw_get_qpid(rdev, uctx);
 182         if (!wq->sq.qid)
 183                 return -ENOMEM;
 184
 185         wq->rq.qid = c4iw_get_qpid(rdev, uctx);
 186         if (!wq->rq.qid) {
 187                 ret = -ENOMEM;
 188                 goto free_sq_qid;
 189         }
 190
 191         if (!user) {
 192                 wq->sq.sw_sq = kzalloc(wq->sq.size * sizeof *wq->sq.sw_sq,
 193                                  GFP_KERNEL);
 194                 if (!wq->sq.sw_sq) {
 195                         ret = -ENOMEM;
 196                         goto free_rq_qid;
 197                 }
 198
 199                 wq->rq.sw_rq = kzalloc(wq->rq.size * sizeof *wq->rq.sw_rq,
 200                                  GFP_KERNEL);
 201                 if (!wq->rq.sw_rq) {
 202                         ret = -ENOMEM;
 203                         goto free_sw_sq;
 204                 }
 205         }
 206
 207         /*
 208          * RQT must be a power of 2 and at least 16 deep.
 209          */
 210         wq->rq.rqt_size = roundup_pow_of_two(max_t(u16, wq->rq.size, 16));
 211         wq->rq.rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rq.rqt_size);
 212         if (!wq->rq.rqt_hwaddr) {
 213                 ret = -ENOMEM;
 214                 goto free_sw_rq;
 215         }
 216
 217         ret = alloc_sq(rdev, &wq->sq, user);
 218         if (ret)
 219                 goto free_hwaddr;
 220         memset(wq->sq.queue, 0, wq->sq.memsize);
 221         dma_unmap_addr_set(&wq->sq, mapping, wq->sq.dma_addr);
 222
 223         wq->rq.queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev),
 224                                           wq->rq.memsize, &(wq->rq.dma_addr),
 225                                           GFP_KERNEL);
 226         if (!wq->rq.queue) {
 227                 ret = -ENOMEM;
 228                 goto free_sq;
 229         }
 230         PDBG("%s sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx\n",
 231                 __func__, wq->sq.queue,
 232                 (unsigned long long)virt_to_phys(wq->sq.queue),
 233                 wq->rq.queue,
 234                 (unsigned long long)virt_to_phys(wq->rq.queue));
 235         memset(wq->rq.queue, 0, wq->rq.memsize);
 236         dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr);
 237
 238         wq->db = rdev->lldi.db_reg;
 239         wq->gts = rdev->lldi.gts_reg;
 240         if (user || is_t5(rdev->lldi.adapter_type)) {
 241                 u32 off;
 242
 243                 off = (wq->sq.qid << rdev->qpshift) & PAGE_MASK;
 244                 if (user) {
 245                         wq->sq.udb = (u64 __iomem *)(rdev->bar2_pa + off);
 246                 } else {
 247                         off += 128 * (wq->sq.qid & rdev->qpmask) + 8;
 248                         wq->sq.udb = (u64 __iomem *)(rdev->bar2_kva + off);
 249                 }
 250                 off = (wq->rq.qid << rdev->qpshift) & PAGE_MASK;
 251                 if (user) {
 252                         wq->rq.udb = (u64 __iomem *)(rdev->bar2_pa + off);
 253                 } else {
 254                         off += 128 * (wq->rq.qid & rdev->qpmask) + 8;
 255                         wq->rq.udb = (u64 __iomem *)(rdev->bar2_kva + off);
 256                 }
 257         }
 258         wq->rdev = rdev;
 259         wq->rq.msn = 1;
 260
 261         /* build fw_ri_res_wr */
 262         wr_len = sizeof *res_wr + 2 * sizeof *res;
 263
 264         skb = alloc_skb(wr_len, GFP_KERNEL);
 265         if (!skb) {
 266                 ret = -ENOMEM;
 267                 goto free_dma;
 268         }
 269         set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
 270
 271         res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len);
 272         memset(res_wr, 0, wr_len);
 273         res_wr->op_nres = cpu_to_be32(
 274                         FW_WR_OP(FW_RI_RES_WR) |
 275                         V_FW_RI_RES_WR_NRES(2) |
 276                         FW_WR_COMPL(1));
 277         res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16));
 278         res_wr->cookie = (unsigned long) &wr_wait;
 279         res = res_wr->res;
 280         res->u.sqrq.restype = FW_RI_RES_TYPE_SQ;
 281         res->u.sqrq.op = FW_RI_RES_OP_WRITE;
 282
 283         /*
 284          * eqsize is the number of 64B entries plus the status page size.
 285          */
 286         eqsize = wq->sq.size * T4_SQ_NUM_SLOTS +
 287                 rdev->hw_queue.t4_eq_status_entries;
 288
 289         res->u.sqrq.fetchszm_to_iqid = cpu_to_be32(
 290                 V_FW_RI_RES_WR_HOSTFCMODE(0) |  /* no host cidx updates */
 291                 V_FW_RI_RES_WR_CPRIO(0) |       /* don't keep in chip cache */
 292                 V_FW_RI_RES_WR_PCIECHN(0) |     /* set by uP at ri_init time */
 293                 (t4_sq_onchip(&wq->sq) ? F_FW_RI_RES_WR_ONCHIP : 0) |
 294                 V_FW_RI_RES_WR_IQID(scq->cqid));
 295         res->u.sqrq.dcaen_to_eqsize = cpu_to_be32(
 296                 V_FW_RI_RES_WR_DCAEN(0) |
 297                 V_FW_RI_RES_WR_DCACPU(0) |
 298                 V_FW_RI_RES_WR_FBMIN(2) |
 299                 V_FW_RI_RES_WR_FBMAX(2) |
 300                 V_FW_RI_RES_WR_CIDXFTHRESHO(0) |
 301                 V_FW_RI_RES_WR_CIDXFTHRESH(0) |
 302                 V_FW_RI_RES_WR_EQSIZE(eqsize));
 303         res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid);
 304         res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr);
 305         res++;
 306         res->u.sqrq.restype = FW_RI_RES_TYPE_RQ;
 307         res->u.sqrq.op = FW_RI_RES_OP_WRITE;
 308
 309         /*
 310          * eqsize is the number of 64B entries plus the status page size.
 311          */
 312         eqsize = wq->rq.size * T4_RQ_NUM_SLOTS +
 313                 rdev->hw_queue.t4_eq_status_entries;
 314         res->u.sqrq.fetchszm_to_iqid = cpu_to_be32(
 315                 V_FW_RI_RES_WR_HOSTFCMODE(0) |  /* no host cidx updates */
 316                 V_FW_RI_RES_WR_CPRIO(0) |       /* don't keep in chip cache */
 317                 V_FW_RI_RES_WR_PCIECHN(0) |     /* set by uP at ri_init time */
 318                 V_FW_RI_RES_WR_IQID(rcq->cqid));
 319         res->u.sqrq.dcaen_to_eqsize = cpu_to_be32(
 320                 V_FW_RI_RES_WR_DCAEN(0) |
 321                 V_FW_RI_RES_WR_DCACPU(0) |
 322                 V_FW_RI_RES_WR_FBMIN(2) |
 323                 V_FW_RI_RES_WR_FBMAX(2) |
 324                 V_FW_RI_RES_WR_CIDXFTHRESHO(0) |
 325                 V_FW_RI_RES_WR_CIDXFTHRESH(0) |
 326                 V_FW_RI_RES_WR_EQSIZE(eqsize));
 327         res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid);
 328         res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr);
 329
 330         c4iw_init_wr_wait(&wr_wait);
 331
 332         ret = c4iw_ofld_send(rdev, skb);
 333         if (ret)
 334                 goto free_dma;
 335         ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, wq->sq.qid, __func__);
 336         if (ret)
 337                 goto free_dma;
 338
 339         PDBG("%s sqid 0x%x rqid 0x%x kdb 0x%p squdb 0x%lx rqudb 0x%lx\n",
 340              __func__, wq->sq.qid, wq->rq.qid, wq->db,
 341              (__force unsigned long) wq->sq.udb,
 342              (__force unsigned long) wq->rq.udb);
 343
 344         return 0;
 345 free_dma:
 346         dma_free_coherent(&(rdev->lldi.pdev->dev),
 347                           wq->rq.memsize, wq->rq.queue,
 348                           dma_unmap_addr(&wq->rq, mapping));
 349 free_sq:
 350         dealloc_sq(rdev, &wq->sq);
 351 free_hwaddr:
 352         c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
 353 free_sw_rq:
 354         kfree(wq->rq.sw_rq);
 355 free_sw_sq:
 356         kfree(wq->sq.sw_sq);
 357 free_rq_qid:
 358         c4iw_put_qpid(rdev, wq->rq.qid, uctx);
 359 free_sq_qid:
 360         c4iw_put_qpid(rdev, wq->sq.qid, uctx);
 361         return ret;
 362 }
 363
 364 static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp,
 365                       struct ib_send_wr *wr, int max, u32 *plenp)
 366 {
 367         u8 *dstp, *srcp;
 368         u32 plen = 0;
 369         int i;
 370         int rem, len;
 371
 372         dstp = (u8 *)immdp->data;
 373         for (i = 0; i < wr->num_sge; i++) {
 374                 if ((plen + wr->sg_list[i].length) > max)
 375                         return -EMSGSIZE;
 376                 srcp = (u8 *)(unsigned long)wr->sg_list[i].addr;
 377                 plen += wr->sg_list[i].length;
 378                 rem = wr->sg_list[i].length;
 379                 while (rem) {
 380                         if (dstp == (u8 *)&sq->queue[sq->size])
 381                                 dstp = (u8 *)sq->queue;
 382                         if (rem <= (u8 *)&sq->queue[sq->size] - dstp)
 383                                 len = rem;
 384                         else
 385                                 len = (u8 *)&sq->queue[sq->size] - dstp;
 386                         memcpy(dstp, srcp, len);
 387                         dstp += len;
 388                         srcp += len;
 389                         rem -= len;
 390                 }
 391         }
 392         len = roundup(plen + sizeof *immdp, 16) - (plen + sizeof *immdp);
 393         if (len)
 394                 memset(dstp, 0, len);
 395         immdp->op = FW_RI_DATA_IMMD;
 396         immdp->r1 = 0;
 397         immdp->r2 = 0;
 398         immdp->immdlen = cpu_to_be32(plen);
 399         *plenp = plen;
 400         return 0;
 401 }
 402
 403 static int build_isgl(__be64 *queue_start, __be64 *queue_end,
 404                       struct fw_ri_isgl *isglp, struct ib_sge *sg_list,
 405                       int num_sge, u32 *plenp)
 406
 407 {
 408         int i;
 409         u32 plen = 0;
 410         __be64 *flitp = (__be64 *)isglp->sge;
 411
 412         for (i = 0; i < num_sge; i++) {
 413                 if ((plen + sg_list[i].length) < plen)
 414                         return -EMSGSIZE;
 415                 plen += sg_list[i].length;
 416                 *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) |
 417                                      sg_list[i].length);
 418                 if (++flitp == queue_end)
 419                         flitp = queue_start;
 420                 *flitp = cpu_to_be64(sg_list[i].addr);
 421                 if (++flitp == queue_end)
 422                         flitp = queue_start;
 423         }
 424         *flitp = (__force __be64)0;
 425         isglp->op = FW_RI_DATA_ISGL;
 426         isglp->r1 = 0;
 427         isglp->nsge = cpu_to_be16(num_sge);
 428         isglp->r2 = 0;
 429         if (plenp)
 430                 *plenp = plen;
 431         return 0;
 432 }
 433
 434 static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe,
 435                            struct ib_send_wr *wr, u8 *len16)
 436 {
 437         u32 plen;
 438         int size;
 439         int ret;
 440
 441         if (wr->num_sge > T4_MAX_SEND_SGE)
 442                 return -EINVAL;
 443         switch (wr->opcode) {
 444         case IB_WR_SEND:
 445                 if (wr->send_flags & IB_SEND_SOLICITED)
 446                         wqe->send.sendop_pkd = cpu_to_be32(
 447                                 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE));
 448                 else
 449                         wqe->send.sendop_pkd = cpu_to_be32(
 450                                 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND));
 451                 wqe->send.stag_inv = 0;
 452                 break;
 453         case IB_WR_SEND_WITH_INV:
 454                 if (wr->send_flags & IB_SEND_SOLICITED)
 455                         wqe->send.sendop_pkd = cpu_to_be32(
 456                                 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE_INV));
 457                 else
 458                         wqe->send.sendop_pkd = cpu_to_be32(
 459                                 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_INV));
 460                 wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey);
 461                 break;
 462
 463         default:
 464                 return -EINVAL;
 465         }
 466         wqe->send.r3 = 0;
 467         wqe->send.r4 = 0;
 468
 469         plen = 0;
 470         if (wr->num_sge) {
 471                 if (wr->send_flags & IB_SEND_INLINE) {
 472                         ret = build_immd(sq, wqe->send.u.immd_src, wr,
 473                                          T4_MAX_SEND_INLINE, &plen);
 474                         if (ret)
 475                                 return ret;
 476                         size = sizeof wqe->send + sizeof(struct fw_ri_immd) +
 477                                plen;
 478                 } else {
 479                         ret = build_isgl((__be64 *)sq->queue,
 480                                          (__be64 *)&sq->queue[sq->size],
 481                                          wqe->send.u.isgl_src,
 482                                          wr->sg_list, wr->num_sge, &plen);
 483                         if (ret)
 484                                 return ret;
 485                         size = sizeof wqe->send + sizeof(struct fw_ri_isgl) +
 486                                wr->num_sge * sizeof(struct fw_ri_sge);
 487                 }
 488         } else {
 489                 wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD;
 490                 wqe->send.u.immd_src[0].r1 = 0;
 491                 wqe->send.u.immd_src[0].r2 = 0;
 492                 wqe->send.u.immd_src[0].immdlen = 0;
 493                 size = sizeof wqe->send + sizeof(struct fw_ri_immd);
 494                 plen = 0;
 495         }
 496         *len16 = DIV_ROUND_UP(size, 16);
 497         wqe->send.plen = cpu_to_be32(plen);
 498         return 0;
 499 }
 500
 501 static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe,
 502                             struct ib_send_wr *wr, u8 *len16)
 503 {
 504         u32 plen;
 505         int size;
 506         int ret;
 507
 508         if (wr->num_sge > T4_MAX_SEND_SGE)
 509                 return -EINVAL;
 510         wqe->write.r2 = 0;
 511         wqe->write.stag_sink = cpu_to_be32(wr->wr.rdma.rkey);
 512         wqe->write.to_sink = cpu_to_be64(wr->wr.rdma.remote_addr);
 513         if (wr->num_sge) {
 514                 if (wr->send_flags & IB_SEND_INLINE) {
 515                         ret = build_immd(sq, wqe->write.u.immd_src, wr,
 516                                          T4_MAX_WRITE_INLINE, &plen);
 517                         if (ret)
 518                                 return ret;
 519                         size = sizeof wqe->write + sizeof(struct fw_ri_immd) +
 520                                plen;
 521                 } else {
 522                         ret = build_isgl((__be64 *)sq->queue,
 523                                          (__be64 *)&sq->queue[sq->size],
 524                                          wqe->write.u.isgl_src,
 525                                          wr->sg_list, wr->num_sge, &plen);
 526                         if (ret)
 527                                 return ret;
 528                         size = sizeof wqe->write + sizeof(struct fw_ri_isgl) +
 529                                wr->num_sge * sizeof(struct fw_ri_sge);
 530                 }
 531         } else {
 532                 wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD;
 533                 wqe->write.u.immd_src[0].r1 = 0;
 534                 wqe->write.u.immd_src[0].r2 = 0;
 535                 wqe->write.u.immd_src[0].immdlen = 0;
 536                 size = sizeof wqe->write + sizeof(struct fw_ri_immd);
 537                 plen = 0;
 538         }
 539         *len16 = DIV_ROUND_UP(size, 16);
 540         wqe->write.plen = cpu_to_be32(plen);
 541         return 0;
 542 }
 543
 544 static int build_rdma_read(union t4_wr *wqe, struct ib_send_wr *wr, u8 *len16)
 545 {
 546         if (wr->num_sge > 1)
 547                 return -EINVAL;
 548         if (wr->num_sge) {
 549                 wqe->read.stag_src = cpu_to_be32(wr->wr.rdma.rkey);
 550                 wqe->read.to_src_hi = cpu_to_be32((u32)(wr->wr.rdma.remote_addr
 551                                                         >> 32));
 552                 wqe->read.to_src_lo = cpu_to_be32((u32)wr->wr.rdma.remote_addr);
 553                 wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey);
 554                 wqe->read.plen = cpu_to_be32(wr->sg_list[0].length);
 555                 wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr
 556                                                          >> 32));
 557                 wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr));
 558         } else {
 559                 wqe->read.stag_src = cpu_to_be32(2);
 560                 wqe->read.to_src_hi = 0;
 561                 wqe->read.to_src_lo = 0;
 562                 wqe->read.stag_sink = cpu_to_be32(2);
 563                 wqe->read.plen = 0;
 564                 wqe->read.to_sink_hi = 0;
 565                 wqe->read.to_sink_lo = 0;
 566         }
 567         wqe->read.r2 = 0;
 568         wqe->read.r5 = 0;
 569         *len16 = DIV_ROUND_UP(sizeof wqe->read, 16);
 570         return 0;
 571 }
 572
 573 static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe,
 574                            struct ib_recv_wr *wr, u8 *len16)
 575 {
 576         int ret;
 577
 578         ret = build_isgl((__be64 *)qhp->wq.rq.queue,
 579                          (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size],
 580                          &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL);
 581         if (ret)
 582                 return ret;
 583         *len16 = DIV_ROUND_UP(sizeof wqe->recv +
 584                               wr->num_sge * sizeof(struct fw_ri_sge), 16);
 585         return 0;
 586 }
 587
 588 static int build_fastreg(struct t4_sq *sq, union t4_wr *wqe,
 589                          struct ib_send_wr *wr, u8 *len16, u8 t5dev)
 590 {
 591
 592         struct fw_ri_immd *imdp;
 593         __be64 *p;
 594         int i;
 595         int pbllen = roundup(wr->wr.fast_reg.page_list_len * sizeof(u64), 32);
 596         int rem;
 597
 598         if (wr->wr.fast_reg.page_list_len >
 599             t4_max_fr_depth(use_dsgl))
 600                 return -EINVAL;
 601
 602         wqe->fr.qpbinde_to_dcacpu = 0;
 603         wqe->fr.pgsz_shift = wr->wr.fast_reg.page_shift - 12;
 604         wqe->fr.addr_type = FW_RI_VA_BASED_TO;
 605         wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->wr.fast_reg.access_flags);
 606         wqe->fr.len_hi = 0;
 607         wqe->fr.len_lo = cpu_to_be32(wr->wr.fast_reg.length);
 608         wqe->fr.stag = cpu_to_be32(wr->wr.fast_reg.rkey);
 609         wqe->fr.va_hi = cpu_to_be32(wr->wr.fast_reg.iova_start >> 32);
 610         wqe->fr.va_lo_fbo = cpu_to_be32(wr->wr.fast_reg.iova_start &
 611                                         0xffffffff);
 612
 613         if (t5dev && use_dsgl && (pbllen > max_fr_immd)) {
 614                 struct c4iw_fr_page_list *c4pl =
 615                         to_c4iw_fr_page_list(wr->wr.fast_reg.page_list);
 616                 struct fw_ri_dsgl *sglp;
 617
 618                 for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) {
 619                         wr->wr.fast_reg.page_list->page_list[i] = (__force u64)
 620                                 cpu_to_be64((u64)
 621                                 wr->wr.fast_reg.page_list->page_list[i]);
 622                 }
 623
 624                 sglp = (struct fw_ri_dsgl *)(&wqe->fr + 1);
 625                 sglp->op = FW_RI_DATA_DSGL;
 626                 sglp->r1 = 0;
 627                 sglp->nsge = cpu_to_be16(1);
 628                 sglp->addr0 = cpu_to_be64(c4pl->dma_addr);
 629                 sglp->len0 = cpu_to_be32(pbllen);
 630
 631                 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*sglp), 16);
 632         } else {
 633                 imdp = (struct fw_ri_immd *)(&wqe->fr + 1);
 634                 imdp->op = FW_RI_DATA_IMMD;
 635                 imdp->r1 = 0;
 636                 imdp->r2 = 0;
 637                 imdp->immdlen = cpu_to_be32(pbllen);
 638                 p = (__be64 *)(imdp + 1);
 639                 rem = pbllen;
 640                 for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) {
 641                         *p = cpu_to_be64(
 642                                 (u64)wr->wr.fast_reg.page_list->page_list[i]);
 643                         rem -= sizeof(*p);
 644                         if (++p == (__be64 *)&sq->queue[sq->size])
 645                                 p = (__be64 *)sq->queue;
 646                 }
 647                 BUG_ON(rem < 0);
 648                 while (rem) {
 649                         *p = 0;
 650                         rem -= sizeof(*p);
 651                         if (++p == (__be64 *)&sq->queue[sq->size])
 652                                 p = (__be64 *)sq->queue;
 653                 }
 654                 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*imdp)
 655                                       + pbllen, 16);
 656         }
 657         return 0;
 658 }
 659
 660 static int build_inv_stag(union t4_wr *wqe, struct ib_send_wr *wr,
 661                           u8 *len16)
 662 {
 663         wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey);
 664         wqe->inv.r2 = 0;
 665         *len16 = DIV_ROUND_UP(sizeof wqe->inv, 16);
 666         return 0;
 667 }
 668
 669 void c4iw_qp_add_ref(struct ib_qp *qp)
 670 {
 671         PDBG("%s ib_qp %p\n", __func__, qp);
 672         atomic_inc(&(to_c4iw_qp(qp)->refcnt));
 673 }
 674
 675 void c4iw_qp_rem_ref(struct ib_qp *qp)
 676 {
 677         PDBG("%s ib_qp %p\n", __func__, qp);
 678         if (atomic_dec_and_test(&(to_c4iw_qp(qp)->refcnt)))
 679                 wake_up(&(to_c4iw_qp(qp)->wait));
 680 }
 681
 682 static void add_to_fc_list(struct list_head *head, struct list_head *entry)
 683 {
 684         if (list_empty(entry))
 685                 list_add_tail(entry, head);
 686 }
 687
 688 static int ring_kernel_sq_db(struct c4iw_qp *qhp, u16 inc)
 689 {
 690         unsigned long flags;
 691
 692         spin_lock_irqsave(&qhp->rhp->lock, flags);
 693         spin_lock(&qhp->lock);
 694         if (qhp->rhp->db_state == NORMAL)
 695                 t4_ring_sq_db(&qhp->wq, inc,
 696                               is_t5(qhp->rhp->rdev.lldi.adapter_type), NULL);
 697         else {
 698                 add_to_fc_list(&qhp->rhp->db_fc_list, &qhp->db_fc_entry);
 699                 qhp->wq.sq.wq_pidx_inc += inc;
 700         }
 701         spin_unlock(&qhp->lock);
 702         spin_unlock_irqrestore(&qhp->rhp->lock, flags);
 703         return 0;
 704 }
 705
 706 static int ring_kernel_rq_db(struct c4iw_qp *qhp, u16 inc)
 707 {
 708         unsigned long flags;
 709
 710         spin_lock_irqsave(&qhp->rhp->lock, flags);
 711         spin_lock(&qhp->lock);
 712         if (qhp->rhp->db_state == NORMAL)
 713                 t4_ring_rq_db(&qhp->wq, inc,
 714                               is_t5(qhp->rhp->rdev.lldi.adapter_type), NULL);
 715         else {
 716                 add_to_fc_list(&qhp->rhp->db_fc_list, &qhp->db_fc_entry);
 717                 qhp->wq.rq.wq_pidx_inc += inc;
 718         }
 719         spin_unlock(&qhp->lock);
 720         spin_unlock_irqrestore(&qhp->rhp->lock, flags);
 721         return 0;
 722 }
 723
 724 int c4iw_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 725                    struct ib_send_wr **bad_wr)
 726 {
 727         int err = 0;
 728         u8 len16 = 0;
 729         enum fw_wr_opcodes fw_opcode = 0;
 730         enum fw_ri_wr_flags fw_flags;
 731         struct c4iw_qp *qhp;
 732         union t4_wr *wqe = NULL;
 733         u32 num_wrs;
 734         struct t4_swsqe *swsqe;
 735         unsigned long flag;
 736         u16 idx = 0;
 737
 738         qhp = to_c4iw_qp(ibqp);
 739         spin_lock_irqsave(&qhp->lock, flag);
 740         if (t4_wq_in_error(&qhp->wq)) {
 741                 spin_unlock_irqrestore(&qhp->lock, flag);
 742                 return -EINVAL;
 743         }
 744         num_wrs = t4_sq_avail(&qhp->wq);
 745         if (num_wrs == 0) {
 746                 spin_unlock_irqrestore(&qhp->lock, flag);
 747                 return -ENOMEM;
 748         }
 749         while (wr) {
 750                 if (num_wrs == 0) {
 751                         err = -ENOMEM;
 752                         *bad_wr = wr;
 753                         break;
 754                 }
 755                 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue +
 756                       qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE);
 757
 758                 fw_flags = 0;
 759                 if (wr->send_flags & IB_SEND_SOLICITED)
 760                         fw_flags |= FW_RI_SOLICITED_EVENT_FLAG;
 761                 if (wr->send_flags & IB_SEND_SIGNALED || qhp->sq_sig_all)
 762                         fw_flags |= FW_RI_COMPLETION_FLAG;
 763                 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx];
 764                 switch (wr->opcode) {
 765                 case IB_WR_SEND_WITH_INV:
 766                 case IB_WR_SEND:
 767                         if (wr->send_flags & IB_SEND_FENCE)
 768                                 fw_flags |= FW_RI_READ_FENCE_FLAG;
 769                         fw_opcode = FW_RI_SEND_WR;
 770                         if (wr->opcode == IB_WR_SEND)
 771                                 swsqe->opcode = FW_RI_SEND;
 772                         else
 773                                 swsqe->opcode = FW_RI_SEND_WITH_INV;
 774                         err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16);
 775                         break;
 776                 case IB_WR_RDMA_WRITE:
 777                         fw_opcode = FW_RI_RDMA_WRITE_WR;
 778                         swsqe->opcode = FW_RI_RDMA_WRITE;
 779                         err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16);
 780                         break;
 781                 case IB_WR_RDMA_READ:
 782                 case IB_WR_RDMA_READ_WITH_INV:
 783                         fw_opcode = FW_RI_RDMA_READ_WR;
 784                         swsqe->opcode = FW_RI_READ_REQ;
 785                         if (wr->opcode == IB_WR_RDMA_READ_WITH_INV)
 786                                 fw_flags = FW_RI_RDMA_READ_INVALIDATE;
 787                         else
 788                                 fw_flags = 0;
 789                         err = build_rdma_read(wqe, wr, &len16);
 790                         if (err)
 791                                 break;
 792                         swsqe->read_len = wr->sg_list[0].length;
 793                         if (!qhp->wq.sq.oldest_read)
 794                                 qhp->wq.sq.oldest_read = swsqe;
 795                         break;
 796                 case IB_WR_FAST_REG_MR:
 797                         fw_opcode = FW_RI_FR_NSMR_WR;
 798                         swsqe->opcode = FW_RI_FAST_REGISTER;
 799                         err = build_fastreg(&qhp->wq.sq, wqe, wr, &len16,
 800                                             is_t5(
 801                                             qhp->rhp->rdev.lldi.adapter_type) ?
 802                                             1 : 0);
 803                         break;
 804                 case IB_WR_LOCAL_INV:
 805                         if (wr->send_flags & IB_SEND_FENCE)
 806                                 fw_flags |= FW_RI_LOCAL_FENCE_FLAG;
 807                         fw_opcode = FW_RI_INV_LSTAG_WR;
 808                         swsqe->opcode = FW_RI_LOCAL_INV;
 809                         err = build_inv_stag(wqe, wr, &len16);
 810                         break;
 811                 default:
 812                         PDBG("%s post of type=%d TBD!\n", __func__,
 813                              wr->opcode);
 814                         err = -EINVAL;
 815                 }
 816                 if (err) {
 817                         *bad_wr = wr;
 818                         break;
 819                 }
 820                 swsqe->idx = qhp->wq.sq.pidx;
 821                 swsqe->complete = 0;
 822                 swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED) ||
 823                                   qhp->sq_sig_all;
 824                 swsqe->flushed = 0;
 825                 swsqe->wr_id = wr->wr_id;
 826                 if (c4iw_wr_log) {
 827                         swsqe->sge_ts = cxgb4_read_sge_timestamp(
 828                                         qhp->rhp->rdev.lldi.ports[0]);
 829                         getnstimeofday(&swsqe->host_ts);
 830                 }
 831
 832                 init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16);
 833
 834                 PDBG("%s cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u\n",
 835                      __func__, (unsigned long long)wr->wr_id, qhp->wq.sq.pidx,
 836                      swsqe->opcode, swsqe->read_len);
 837                 wr = wr->next;
 838                 num_wrs--;
 839                 t4_sq_produce(&qhp->wq, len16);
 840                 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
 841         }
 842         if (!qhp->rhp->rdev.status_page->db_off) {
 843                 t4_ring_sq_db(&qhp->wq, idx,
 844                               is_t5(qhp->rhp->rdev.lldi.adapter_type), wqe);
 845                 spin_unlock_irqrestore(&qhp->lock, flag);
 846         } else {
 847                 spin_unlock_irqrestore(&qhp->lock, flag);
 848                 ring_kernel_sq_db(qhp, idx);
 849         }
 850         return err;
 851 }
 852
 853 int c4iw_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 854                       struct ib_recv_wr **bad_wr)
 855 {
 856         int err = 0;
 857         struct c4iw_qp *qhp;
 858         union t4_recv_wr *wqe = NULL;
 859         u32 num_wrs;
 860         u8 len16 = 0;
 861         unsigned long flag;
 862         u16 idx = 0;
 863
 864         qhp = to_c4iw_qp(ibqp);
 865         spin_lock_irqsave(&qhp->lock, flag);
 866         if (t4_wq_in_error(&qhp->wq)) {
 867                 spin_unlock_irqrestore(&qhp->lock, flag);
 868                 return -EINVAL;
 869         }
 870         num_wrs = t4_rq_avail(&qhp->wq);
 871         if (num_wrs == 0) {
 872                 spin_unlock_irqrestore(&qhp->lock, flag);
 873                 return -ENOMEM;
 874         }
 875         while (wr) {
 876                 if (wr->num_sge > T4_MAX_RECV_SGE) {
 877                         err = -EINVAL;
 878                         *bad_wr = wr;
 879                         break;
 880                 }
 881                 wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue +
 882                                            qhp->wq.rq.wq_pidx *
 883                                            T4_EQ_ENTRY_SIZE);
 884                 if (num_wrs)
 885                         err = build_rdma_recv(qhp, wqe, wr, &len16);
 886                 else
 887                         err = -ENOMEM;
 888                 if (err) {
 889                         *bad_wr = wr;
 890                         break;
 891                 }
 892
 893                 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id;
 894                 if (c4iw_wr_log) {
 895                         qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].sge_ts =
 896                                 cxgb4_read_sge_timestamp(
 897                                                 qhp->rhp->rdev.lldi.ports[0]);
 898                         getnstimeofday(
 899                                 &qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].host_ts);
 900                 }
 901
 902                 wqe->recv.opcode = FW_RI_RECV_WR;
 903                 wqe->recv.r1 = 0;
 904                 wqe->recv.wrid = qhp->wq.rq.pidx;
 905                 wqe->recv.r2[0] = 0;
 906                 wqe->recv.r2[1] = 0;
 907                 wqe->recv.r2[2] = 0;
 908                 wqe->recv.len16 = len16;
 909                 PDBG("%s cookie 0x%llx pidx %u\n", __func__,
 910                      (unsigned long long) wr->wr_id, qhp->wq.rq.pidx);
 911                 t4_rq_produce(&qhp->wq, len16);
 912                 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
 913                 wr = wr->next;
 914                 num_wrs--;
 915         }
 916         if (!qhp->rhp->rdev.status_page->db_off) {
 917                 t4_ring_rq_db(&qhp->wq, idx,
 918                               is_t5(qhp->rhp->rdev.lldi.adapter_type), wqe);
 919                 spin_unlock_irqrestore(&qhp->lock, flag);
 920         } else {
 921                 spin_unlock_irqrestore(&qhp->lock, flag);
 922                 ring_kernel_rq_db(qhp, idx);
 923         }
 924         return err;
 925 }
 926
 927 int c4iw_bind_mw(struct ib_qp *qp, struct ib_mw *mw, struct ib_mw_bind *mw_bind)
 928 {
 929         return -ENOSYS;
 930 }
 931
 932 static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type,
 933                                     u8 *ecode)
 934 {
 935         int status;
 936         int tagged;
 937         int opcode;
 938         int rqtype;
 939         int send_inv;
 940
 941         if (!err_cqe) {
 942                 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
 943                 *ecode = 0;
 944                 return;
 945         }
 946
 947         status = CQE_STATUS(err_cqe);
 948         opcode = CQE_OPCODE(err_cqe);
 949         rqtype = RQ_TYPE(err_cqe);
 950         send_inv = (opcode == FW_RI_SEND_WITH_INV) ||
 951                    (opcode == FW_RI_SEND_WITH_SE_INV);
 952         tagged = (opcode == FW_RI_RDMA_WRITE) ||
 953                  (rqtype && (opcode == FW_RI_READ_RESP));
 954
 955         switch (status) {
 956         case T4_ERR_STAG:
 957                 if (send_inv) {
 958                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 959                         *ecode = RDMAP_CANT_INV_STAG;
 960                 } else {
 961                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 962                         *ecode = RDMAP_INV_STAG;
 963                 }
 964                 break;
 965         case T4_ERR_PDID:
 966                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 967                 if ((opcode == FW_RI_SEND_WITH_INV) ||
 968                     (opcode == FW_RI_SEND_WITH_SE_INV))
 969                         *ecode = RDMAP_CANT_INV_STAG;
 970                 else
 971                         *ecode = RDMAP_STAG_NOT_ASSOC;
 972                 break;
 973         case T4_ERR_QPID:
 974                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 975                 *ecode = RDMAP_STAG_NOT_ASSOC;
 976                 break;
 977         case T4_ERR_ACCESS:
 978                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 979                 *ecode = RDMAP_ACC_VIOL;
 980                 break;
 981         case T4_ERR_WRAP:
 982                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 983                 *ecode = RDMAP_TO_WRAP;
 984                 break;
 985         case T4_ERR_BOUND:
 986                 if (tagged) {
 987                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
 988                         *ecode = DDPT_BASE_BOUNDS;
 989                 } else {
 990                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
 991                         *ecode = RDMAP_BASE_BOUNDS;
 992                 }
 993                 break;
 994         case T4_ERR_INVALIDATE_SHARED_MR:
 995         case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND:
 996                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 997                 *ecode = RDMAP_CANT_INV_STAG;
 998                 break;
 999         case T4_ERR_ECC:
1000         case T4_ERR_ECC_PSTAG:
1001         case T4_ERR_INTERNAL_ERR:
1002                 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA;
1003                 *ecode = 0;
1004                 break;
1005         case T4_ERR_OUT_OF_RQE:
1006                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1007                 *ecode = DDPU_INV_MSN_NOBUF;
1008                 break;
1009         case T4_ERR_PBL_ADDR_BOUND:
1010                 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
1011                 *ecode = DDPT_BASE_BOUNDS;
1012                 break;
1013         case T4_ERR_CRC:
1014                 *layer_type = LAYER_MPA|DDP_LLP;
1015                 *ecode = MPA_CRC_ERR;
1016                 break;
1017         case T4_ERR_MARKER:
1018                 *layer_type = LAYER_MPA|DDP_LLP;
1019                 *ecode = MPA_MARKER_ERR;
1020                 break;
1021         case T4_ERR_PDU_LEN_ERR:
1022                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1023                 *ecode = DDPU_MSG_TOOBIG;
1024                 break;
1025         case T4_ERR_DDP_VERSION:
1026                 if (tagged) {
1027                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
1028                         *ecode = DDPT_INV_VERS;
1029                 } else {
1030                         *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1031                         *ecode = DDPU_INV_VERS;
1032                 }
1033                 break;
1034         case T4_ERR_RDMA_VERSION:
1035                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
1036                 *ecode = RDMAP_INV_VERS;
1037                 break;
1038         case T4_ERR_OPCODE:
1039                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
1040                 *ecode = RDMAP_INV_OPCODE;
1041                 break;
1042         case T4_ERR_DDP_QUEUE_NUM:
1043                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1044                 *ecode = DDPU_INV_QN;
1045                 break;
1046         case T4_ERR_MSN:
1047         case T4_ERR_MSN_GAP:
1048         case T4_ERR_MSN_RANGE:
1049         case T4_ERR_IRD_OVERFLOW:
1050                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1051                 *ecode = DDPU_INV_MSN_RANGE;
1052                 break;
1053         case T4_ERR_TBIT:
1054                 *layer_type = LAYER_DDP|DDP_LOCAL_CATA;
1055                 *ecode = 0;
1056                 break;
1057         case T4_ERR_MO:
1058                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1059                 *ecode = DDPU_INV_MO;
1060                 break;
1061         default:
1062                 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
1063                 *ecode = 0;
1064                 break;
1065         }
1066 }
1067
1068 static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe,
1069                            gfp_t gfp)
1070 {
1071         struct fw_ri_wr *wqe;
1072         struct sk_buff *skb;
1073         struct terminate_message *term;
1074
1075         PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid,
1076              qhp->ep->hwtid);
1077
1078         skb = alloc_skb(sizeof *wqe, gfp);
1079         if (!skb)
1080                 return;
1081         set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx);
1082
1083         wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
1084         memset(wqe, 0, sizeof *wqe);
1085         wqe->op_compl = cpu_to_be32(FW_WR_OP(FW_RI_INIT_WR));
1086         wqe->flowid_len16 = cpu_to_be32(
1087                 FW_WR_FLOWID(qhp->ep->hwtid) |
1088                 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
1089
1090         wqe->u.terminate.type = FW_RI_TYPE_TERMINATE;
1091         wqe->u.terminate.immdlen = cpu_to_be32(sizeof *term);
1092         term = (struct terminate_message *)wqe->u.terminate.termmsg;
1093         if (qhp->attr.layer_etype == (LAYER_MPA|DDP_LLP)) {
1094                 term->layer_etype = qhp->attr.layer_etype;
1095                 term->ecode = qhp->attr.ecode;
1096         } else
1097                 build_term_codes(err_cqe, &term->layer_etype, &term->ecode);
1098         c4iw_ofld_send(&qhp->rhp->rdev, skb);
1099 }
1100
1101 /*
1102  * Assumes qhp lock is held.
1103  */
1104 static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp,
1105                        struct c4iw_cq *schp)
1106 {
1107         int count;
1108         int flushed;
1109         unsigned long flag;
1110
1111         PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp);
1112
1113         /* locking hierarchy: cq lock first, then qp lock. */
1114         spin_lock_irqsave(&rchp->lock, flag);
1115         spin_lock(&qhp->lock);
1116
1117         if (qhp->wq.flushed) {
1118                 spin_unlock(&qhp->lock);
1119                 spin_unlock_irqrestore(&rchp->lock, flag);
1120                 return;
1121         }
1122         qhp->wq.flushed = 1;
1123
1124         c4iw_flush_hw_cq(rchp);
1125         c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count);
1126         flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count);
1127         spin_unlock(&qhp->lock);
1128         spin_unlock_irqrestore(&rchp->lock, flag);
1129         if (flushed) {
1130                 spin_lock_irqsave(&rchp->comp_handler_lock, flag);
1131                 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
1132                 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
1133         }
1134
1135         /* locking hierarchy: cq lock first, then qp lock. */
1136         spin_lock_irqsave(&schp->lock, flag);
1137         spin_lock(&qhp->lock);
1138         if (schp != rchp)
1139                 c4iw_flush_hw_cq(schp);
1140         flushed = c4iw_flush_sq(qhp);
1141         spin_unlock(&qhp->lock);
1142         spin_unlock_irqrestore(&schp->lock, flag);
1143         if (flushed) {
1144                 spin_lock_irqsave(&schp->comp_handler_lock, flag);
1145                 (*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context);
1146                 spin_unlock_irqrestore(&schp->comp_handler_lock, flag);
1147         }
1148 }
1149
1150 static void flush_qp(struct c4iw_qp *qhp)
1151 {
1152         struct c4iw_cq *rchp, *schp;
1153         unsigned long flag;
1154
1155         rchp = to_c4iw_cq(qhp->ibqp.recv_cq);
1156         schp = to_c4iw_cq(qhp->ibqp.send_cq);
1157
1158         t4_set_wq_in_error(&qhp->wq);
1159         if (qhp->ibqp.uobject) {
1160                 t4_set_cq_in_error(&rchp->cq);
1161                 spin_lock_irqsave(&rchp->comp_handler_lock, flag);
1162                 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
1163                 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
1164                 if (schp != rchp) {
1165                         t4_set_cq_in_error(&schp->cq);
1166                         spin_lock_irqsave(&schp->comp_handler_lock, flag);
1167                         (*schp->ibcq.comp_handler)(&schp->ibcq,
1168                                         schp->ibcq.cq_context);
1169                         spin_unlock_irqrestore(&schp->comp_handler_lock, flag);
1170                 }
1171                 return;
1172         }
1173         __flush_qp(qhp, rchp, schp);
1174 }
1175
1176 static int rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
1177                      struct c4iw_ep *ep)
1178 {
1179         struct fw_ri_wr *wqe;
1180         int ret;
1181         struct sk_buff *skb;
1182
1183         PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid,
1184              ep->hwtid);
1185
1186         skb = alloc_skb(sizeof *wqe, GFP_KERNEL);
1187         if (!skb)
1188                 return -ENOMEM;
1189         set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1190
1191         wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
1192         memset(wqe, 0, sizeof *wqe);
1193         wqe->op_compl = cpu_to_be32(
1194                 FW_WR_OP(FW_RI_INIT_WR) |
1195                 FW_WR_COMPL(1));
1196         wqe->flowid_len16 = cpu_to_be32(
1197                 FW_WR_FLOWID(ep->hwtid) |
1198                 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
1199         wqe->cookie = (unsigned long) &ep->com.wr_wait;
1200
1201         wqe->u.fini.type = FW_RI_TYPE_FINI;
1202         ret = c4iw_ofld_send(&rhp->rdev, skb);
1203         if (ret)
1204                 goto out;
1205
1206         ret = c4iw_wait_for_reply(&rhp->rdev, &ep->com.wr_wait, qhp->ep->hwtid,
1207                              qhp->wq.sq.qid, __func__);
1208 out:
1209         PDBG("%s ret %d\n", __func__, ret);
1210         return ret;
1211 }
1212
1213 static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init)
1214 {
1215         PDBG("%s p2p_type = %d\n", __func__, p2p_type);
1216         memset(&init->u, 0, sizeof init->u);
1217         switch (p2p_type) {
1218         case FW_RI_INIT_P2PTYPE_RDMA_WRITE:
1219                 init->u.write.opcode = FW_RI_RDMA_WRITE_WR;
1220                 init->u.write.stag_sink = cpu_to_be32(1);
1221                 init->u.write.to_sink = cpu_to_be64(1);
1222                 init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD;
1223                 init->u.write.len16 = DIV_ROUND_UP(sizeof init->u.write +
1224                                                    sizeof(struct fw_ri_immd),
1225                                                    16);
1226                 break;
1227         case FW_RI_INIT_P2PTYPE_READ_REQ:
1228                 init->u.write.opcode = FW_RI_RDMA_READ_WR;
1229                 init->u.read.stag_src = cpu_to_be32(1);
1230                 init->u.read.to_src_lo = cpu_to_be32(1);
1231                 init->u.read.stag_sink = cpu_to_be32(1);
1232                 init->u.read.to_sink_lo = cpu_to_be32(1);
1233                 init->u.read.len16 = DIV_ROUND_UP(sizeof init->u.read, 16);
1234                 break;
1235         }
1236 }
1237
1238 static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp)
1239 {
1240         struct fw_ri_wr *wqe;
1241         int ret;
1242         struct sk_buff *skb;
1243
1244         PDBG("%s qhp %p qid 0x%x tid %u ird %u ord %u\n", __func__, qhp,
1245              qhp->wq.sq.qid, qhp->ep->hwtid, qhp->ep->ird, qhp->ep->ord);
1246
1247         skb = alloc_skb(sizeof *wqe, GFP_KERNEL);
1248         if (!skb) {
1249                 ret = -ENOMEM;
1250                 goto out;
1251         }
1252         ret = alloc_ird(rhp, qhp->attr.max_ird);
1253         if (ret) {
1254                 qhp->attr.max_ird = 0;
1255                 kfree_skb(skb);
1256                 goto out;
1257         }
1258         set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx);
1259
1260         wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
1261         memset(wqe, 0, sizeof *wqe);
1262         wqe->op_compl = cpu_to_be32(
1263                 FW_WR_OP(FW_RI_INIT_WR) |
1264                 FW_WR_COMPL(1));
1265         wqe->flowid_len16 = cpu_to_be32(
1266                 FW_WR_FLOWID(qhp->ep->hwtid) |
1267                 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
1268
1269         wqe->cookie = (unsigned long) &qhp->ep->com.wr_wait;
1270
1271         wqe->u.init.type = FW_RI_TYPE_INIT;
1272         wqe->u.init.mpareqbit_p2ptype =
1273                 V_FW_RI_WR_MPAREQBIT(qhp->attr.mpa_attr.initiator) |
1274                 V_FW_RI_WR_P2PTYPE(qhp->attr.mpa_attr.p2p_type);
1275         wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE;
1276         if (qhp->attr.mpa_attr.recv_marker_enabled)
1277                 wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE;
1278         if (qhp->attr.mpa_attr.xmit_marker_enabled)
1279                 wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE;
1280         if (qhp->attr.mpa_attr.crc_enabled)
1281                 wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE;
1282
1283         wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE |
1284                             FW_RI_QP_RDMA_WRITE_ENABLE |
1285                             FW_RI_QP_BIND_ENABLE;
1286         if (!qhp->ibqp.uobject)
1287                 wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE |
1288                                      FW_RI_QP_STAG0_ENABLE;
1289         wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq));
1290         wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd);
1291         wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid);
1292         wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid);
1293         wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid);
1294         wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq);
1295         wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq);
1296         wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord);
1297         wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird);
1298         wqe->u.init.iss = cpu_to_be32(qhp->ep->snd_seq);
1299         wqe->u.init.irs = cpu_to_be32(qhp->ep->rcv_seq);
1300         wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size);
1301         wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr -
1302                                          rhp->rdev.lldi.vr->rq.start);
1303         if (qhp->attr.mpa_attr.initiator)
1304                 build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init);
1305
1306         ret = c4iw_ofld_send(&rhp->rdev, skb);
1307         if (ret)
1308                 goto err1;
1309
1310         ret = c4iw_wait_for_reply(&rhp->rdev, &qhp->ep->com.wr_wait,
1311                                   qhp->ep->hwtid, qhp->wq.sq.qid, __func__);
1312         if (!ret)
1313                 goto out;
1314 err1:
1315         free_ird(rhp, qhp->attr.max_ird);
1316 out:
1317         PDBG("%s ret %d\n", __func__, ret);
1318         return ret;
1319 }
1320
1321 int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
1322                    enum c4iw_qp_attr_mask mask,
1323                    struct c4iw_qp_attributes *attrs,
1324                    int internal)
1325 {
1326         int ret = 0;
1327         struct c4iw_qp_attributes newattr = qhp->attr;
1328         int disconnect = 0;
1329         int terminate = 0;
1330         int abort = 0;
1331         int free = 0;
1332         struct c4iw_ep *ep = NULL;
1333
1334         PDBG("%s qhp %p sqid 0x%x rqid 0x%x ep %p state %d -> %d\n", __func__,
1335              qhp, qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep, qhp->attr.state,
1336              (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1);
1337
1338         mutex_lock(&qhp->mutex);
1339
1340         /* Process attr changes if in IDLE */
1341         if (mask & C4IW_QP_ATTR_VALID_MODIFY) {
1342                 if (qhp->attr.state != C4IW_QP_STATE_IDLE) {
1343                         ret = -EIO;
1344                         goto out;
1345                 }
1346                 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ)
1347                         newattr.enable_rdma_read = attrs->enable_rdma_read;
1348                 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE)
1349                         newattr.enable_rdma_write = attrs->enable_rdma_write;
1350                 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND)
1351                         newattr.enable_bind = attrs->enable_bind;
1352                 if (mask & C4IW_QP_ATTR_MAX_ORD) {
1353                         if (attrs->max_ord > c4iw_max_read_depth) {
1354                                 ret = -EINVAL;
1355                                 goto out;
1356                         }
1357                         newattr.max_ord = attrs->max_ord;
1358                 }
1359                 if (mask & C4IW_QP_ATTR_MAX_IRD) {
1360                         if (attrs->max_ird > cur_max_read_depth(rhp)) {
1361                                 ret = -EINVAL;
1362                                 goto out;
1363                         }
1364                         newattr.max_ird = attrs->max_ird;
1365                 }
1366                 qhp->attr = newattr;
1367         }
1368
1369         if (mask & C4IW_QP_ATTR_SQ_DB) {
1370                 ret = ring_kernel_sq_db(qhp, attrs->sq_db_inc);
1371                 goto out;
1372         }
1373         if (mask & C4IW_QP_ATTR_RQ_DB) {
1374                 ret = ring_kernel_rq_db(qhp, attrs->rq_db_inc);
1375                 goto out;
1376         }
1377
1378         if (!(mask & C4IW_QP_ATTR_NEXT_STATE))
1379                 goto out;
1380         if (qhp->attr.state == attrs->next_state)
1381                 goto out;
1382
1383         switch (qhp->attr.state) {
1384         case C4IW_QP_STATE_IDLE:
1385                 switch (attrs->next_state) {
1386                 case C4IW_QP_STATE_RTS:
1387                         if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) {
1388                                 ret = -EINVAL;
1389                                 goto out;
1390                         }
1391                         if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) {
1392                                 ret = -EINVAL;
1393                                 goto out;
1394                         }
1395                         qhp->attr.mpa_attr = attrs->mpa_attr;
1396                         qhp->attr.llp_stream_handle = attrs->llp_stream_handle;
1397                         qhp->ep = qhp->attr.llp_stream_handle;
1398                         set_state(qhp, C4IW_QP_STATE_RTS);
1399
1400                         /*
1401                          * Ref the endpoint here and deref when we
1402                          * disassociate the endpoint from the QP.  This
1403                          * happens in CLOSING->IDLE transition or *->ERROR
1404                          * transition.
1405                          */
1406                         c4iw_get_ep(&qhp->ep->com);
1407                         ret = rdma_init(rhp, qhp);
1408                         if (ret)
1409                                 goto err;
1410                         break;
1411                 case C4IW_QP_STATE_ERROR:
1412                         set_state(qhp, C4IW_QP_STATE_ERROR);
1413                         flush_qp(qhp);
1414                         break;
1415                 default:
1416                         ret = -EINVAL;
1417                         goto out;
1418                 }
1419                 break;
1420         case C4IW_QP_STATE_RTS:
1421                 switch (attrs->next_state) {
1422                 case C4IW_QP_STATE_CLOSING:
1423                         BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2);
1424                         t4_set_wq_in_error(&qhp->wq);
1425                         set_state(qhp, C4IW_QP_STATE_CLOSING);
1426                         ep = qhp->ep;
1427                         if (!internal) {
1428                                 abort = 0;
1429                                 disconnect = 1;
1430                                 c4iw_get_ep(&qhp->ep->com);
1431                         }
1432                         ret = rdma_fini(rhp, qhp, ep);
1433                         if (ret)
1434                                 goto err;
1435                         break;
1436                 case C4IW_QP_STATE_TERMINATE:
1437                         t4_set_wq_in_error(&qhp->wq);
1438                         set_state(qhp, C4IW_QP_STATE_TERMINATE);
1439                         qhp->attr.layer_etype = attrs->layer_etype;
1440                         qhp->attr.ecode = attrs->ecode;
1441                         ep = qhp->ep;
1442                         if (!internal) {
1443                                 c4iw_get_ep(&qhp->ep->com);
1444                                 terminate = 1;
1445                                 disconnect = 1;
1446                         } else {
1447                                 terminate = qhp->attr.send_term;
1448                                 ret = rdma_fini(rhp, qhp, ep);
1449                                 if (ret)
1450                                         goto err;
1451                         }
1452                         break;
1453                 case C4IW_QP_STATE_ERROR:
1454                         t4_set_wq_in_error(&qhp->wq);
1455                         set_state(qhp, C4IW_QP_STATE_ERROR);
1456                         if (!internal) {
1457                                 abort = 1;
1458                                 disconnect = 1;
1459                                 ep = qhp->ep;
1460                                 c4iw_get_ep(&qhp->ep->com);
1461                         }
1462                         goto err;
1463                         break;
1464                 default:
1465                         ret = -EINVAL;
1466                         goto out;
1467                 }
1468                 break;
1469         case C4IW_QP_STATE_CLOSING:
1470                 if (!internal) {
1471                         ret = -EINVAL;
1472                         goto out;
1473                 }
1474                 switch (attrs->next_state) {
1475                 case C4IW_QP_STATE_IDLE:
1476                         flush_qp(qhp);
1477                         set_state(qhp, C4IW_QP_STATE_IDLE);
1478                         qhp->attr.llp_stream_handle = NULL;
1479                         c4iw_put_ep(&qhp->ep->com);
1480                         qhp->ep = NULL;
1481                         wake_up(&qhp->wait);
1482                         break;
1483                 case C4IW_QP_STATE_ERROR:
1484                         goto err;
1485                 default:
1486                         ret = -EINVAL;
1487                         goto err;
1488                 }
1489                 break;
1490         case C4IW_QP_STATE_ERROR:
1491                 if (attrs->next_state != C4IW_QP_STATE_IDLE) {
1492                         ret = -EINVAL;
1493                         goto out;
1494                 }
1495                 if (!t4_sq_empty(&qhp->wq) || !t4_rq_empty(&qhp->wq)) {
1496                         ret = -EINVAL;
1497                         goto out;
1498                 }
1499                 set_state(qhp, C4IW_QP_STATE_IDLE);
1500                 break;
1501         case C4IW_QP_STATE_TERMINATE:
1502                 if (!internal) {
1503                         ret = -EINVAL;
1504                         goto out;
1505                 }
1506                 goto err;
1507                 break;
1508         default:
1509                 printk(KERN_ERR "%s in a bad state %d\n",
1510                        __func__, qhp->attr.state);
1511                 ret = -EINVAL;
1512                 goto err;
1513                 break;
1514         }
1515         goto out;
1516 err:
1517         PDBG("%s disassociating ep %p qpid 0x%x\n", __func__, qhp->ep,
1518              qhp->wq.sq.qid);
1519
1520         /* disassociate the LLP connection */
1521         qhp->attr.llp_stream_handle = NULL;
1522         if (!ep)
1523                 ep = qhp->ep;
1524         qhp->ep = NULL;
1525         set_state(qhp, C4IW_QP_STATE_ERROR);
1526         free = 1;
1527         abort = 1;
1528         wake_up(&qhp->wait);
1529         BUG_ON(!ep);
1530         flush_qp(qhp);
1531 out:
1532         mutex_unlock(&qhp->mutex);
1533
1534         if (terminate)
1535                 post_terminate(qhp, NULL, internal ? GFP_ATOMIC : GFP_KERNEL);
1536
1537         /*
1538          * If disconnect is 1, then we need to initiate a disconnect
1539          * on the EP.  This can be a normal close (RTS->CLOSING) or
1540          * an abnormal close (RTS/CLOSING->ERROR).
1541          */
1542         if (disconnect) {
1543                 c4iw_ep_disconnect(ep, abort, internal ? GFP_ATOMIC :
1544                                                          GFP_KERNEL);
1545                 c4iw_put_ep(&ep->com);
1546         }
1547
1548         /*
1549          * If free is 1, then we've disassociated the EP from the QP
1550          * and we need to dereference the EP.
1551          */
1552         if (free)
1553                 c4iw_put_ep(&ep->com);
1554         PDBG("%s exit state %d\n", __func__, qhp->attr.state);
1555         return ret;
1556 }
1557
1558 int c4iw_destroy_qp(struct ib_qp *ib_qp)
1559 {
1560         struct c4iw_dev *rhp;
1561         struct c4iw_qp *qhp;
1562         struct c4iw_qp_attributes attrs;
1563         struct c4iw_ucontext *ucontext;
1564
1565         qhp = to_c4iw_qp(ib_qp);
1566         rhp = qhp->rhp;
1567
1568         attrs.next_state = C4IW_QP_STATE_ERROR;
1569         if (qhp->attr.state == C4IW_QP_STATE_TERMINATE)
1570                 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1571         else
1572                 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1573         wait_event(qhp->wait, !qhp->ep);
1574
1575         remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid);
1576         atomic_dec(&qhp->refcnt);
1577         wait_event(qhp->wait, !atomic_read(&qhp->refcnt));
1578
1579         spin_lock_irq(&rhp->lock);
1580         if (!list_empty(&qhp->db_fc_entry))
1581                 list_del_init(&qhp->db_fc_entry);
1582         spin_unlock_irq(&rhp->lock);
1583         free_ird(rhp, qhp->attr.max_ird);
1584
1585         ucontext = ib_qp->uobject ?
1586                    to_c4iw_ucontext(ib_qp->uobject->context) : NULL;
1587         destroy_qp(&rhp->rdev, &qhp->wq,
1588                    ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1589
1590         PDBG("%s ib_qp %p qpid 0x%0x\n", __func__, ib_qp, qhp->wq.sq.qid);
1591         kfree(qhp);
1592         return 0;
1593 }
1594
1595 struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
1596                              struct ib_udata *udata)
1597 {
1598         struct c4iw_dev *rhp;
1599         struct c4iw_qp *qhp;
1600         struct c4iw_pd *php;
1601         struct c4iw_cq *schp;
1602         struct c4iw_cq *rchp;
1603         struct c4iw_create_qp_resp uresp;
1604         unsigned int sqsize, rqsize;
1605         struct c4iw_ucontext *ucontext;
1606         int ret;
1607         struct c4iw_mm_entry *mm1, *mm2, *mm3, *mm4, *mm5 = NULL;
1608
1609         PDBG("%s ib_pd %p\n", __func__, pd);
1610
1611         if (attrs->qp_type != IB_QPT_RC)
1612                 return ERR_PTR(-EINVAL);
1613
1614         php = to_c4iw_pd(pd);
1615         rhp = php->rhp;
1616         schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid);
1617         rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid);
1618         if (!schp || !rchp)
1619                 return ERR_PTR(-EINVAL);
1620
1621         if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE)
1622                 return ERR_PTR(-EINVAL);
1623
1624         if (attrs->cap.max_recv_wr > rhp->rdev.hw_queue.t4_max_rq_size)
1625                 return ERR_PTR(-E2BIG);
1626         rqsize = attrs->cap.max_recv_wr + 1;
1627         if (rqsize < 8)
1628                 rqsize = 8;
1629
1630         if (attrs->cap.max_send_wr > rhp->rdev.hw_queue.t4_max_sq_size)
1631                 return ERR_PTR(-E2BIG);
1632         sqsize = attrs->cap.max_send_wr + 1;
1633         if (sqsize < 8)
1634                 sqsize = 8;
1635
1636         ucontext = pd->uobject ? to_c4iw_ucontext(pd->uobject->context) : NULL;
1637
1638         qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
1639         if (!qhp)
1640                 return ERR_PTR(-ENOMEM);
1641         qhp->wq.sq.size = sqsize;
1642         qhp->wq.sq.memsize =
1643                 (sqsize + rhp->rdev.hw_queue.t4_eq_status_entries) *
1644                 sizeof(*qhp->wq.sq.queue) + 16 * sizeof(__be64);
1645         qhp->wq.sq.flush_cidx = -1;
1646         qhp->wq.rq.size = rqsize;
1647         qhp->wq.rq.memsize =
1648                 (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) *
1649                 sizeof(*qhp->wq.rq.queue);
1650
1651         if (ucontext) {
1652                 qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE);
1653                 qhp->wq.rq.memsize = roundup(qhp->wq.rq.memsize, PAGE_SIZE);
1654         }
1655
1656         ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq,
1657                         ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1658         if (ret)
1659                 goto err1;
1660
1661         attrs->cap.max_recv_wr = rqsize - 1;
1662         attrs->cap.max_send_wr = sqsize - 1;
1663         attrs->cap.max_inline_data = T4_MAX_SEND_INLINE;
1664
1665         qhp->rhp = rhp;
1666         qhp->attr.pd = php->pdid;
1667         qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid;
1668         qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid;
1669         qhp->attr.sq_num_entries = attrs->cap.max_send_wr;
1670         qhp->attr.rq_num_entries = attrs->cap.max_recv_wr;
1671         qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
1672         qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
1673         qhp->attr.rq_max_sges = attrs->cap.max_recv_sge;
1674         qhp->attr.state = C4IW_QP_STATE_IDLE;
1675         qhp->attr.next_state = C4IW_QP_STATE_IDLE;
1676         qhp->attr.enable_rdma_read = 1;
1677         qhp->attr.enable_rdma_write = 1;
1678         qhp->attr.enable_bind = 1;
1679         qhp->attr.max_ord = 0;
1680         qhp->attr.max_ird = 0;
1681         qhp->sq_sig_all = attrs->sq_sig_type == IB_SIGNAL_ALL_WR;
1682         spin_lock_init(&qhp->lock);
1683         mutex_init(&qhp->mutex);
1684         init_waitqueue_head(&qhp->wait);
1685         atomic_set(&qhp->refcnt, 1);
1686
1687         ret = insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid);
1688         if (ret)
1689                 goto err2;
1690
1691         if (udata) {
1692                 mm1 = kmalloc(sizeof *mm1, GFP_KERNEL);
1693                 if (!mm1) {
1694                         ret = -ENOMEM;
1695                         goto err3;
1696                 }
1697                 mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
1698                 if (!mm2) {
1699                         ret = -ENOMEM;
1700                         goto err4;
1701                 }
1702                 mm3 = kmalloc(sizeof *mm3, GFP_KERNEL);
1703                 if (!mm3) {
1704                         ret = -ENOMEM;
1705                         goto err5;
1706                 }
1707                 mm4 = kmalloc(sizeof *mm4, GFP_KERNEL);
1708                 if (!mm4) {
1709                         ret = -ENOMEM;
1710                         goto err6;
1711                 }
1712                 if (t4_sq_onchip(&qhp->wq.sq)) {
1713                         mm5 = kmalloc(sizeof *mm5, GFP_KERNEL);
1714                         if (!mm5) {
1715                                 ret = -ENOMEM;
1716                                 goto err7;
1717                         }
1718                         uresp.flags = C4IW_QPF_ONCHIP;
1719                 } else
1720                         uresp.flags = 0;
1721                 uresp.qid_mask = rhp->rdev.qpmask;
1722                 uresp.sqid = qhp->wq.sq.qid;
1723                 uresp.sq_size = qhp->wq.sq.size;
1724                 uresp.sq_memsize = qhp->wq.sq.memsize;
1725                 uresp.rqid = qhp->wq.rq.qid;
1726                 uresp.rq_size = qhp->wq.rq.size;
1727                 uresp.rq_memsize = qhp->wq.rq.memsize;
1728                 spin_lock(&ucontext->mmap_lock);
1729                 if (mm5) {
1730                         uresp.ma_sync_key = ucontext->key;
1731                         ucontext->key += PAGE_SIZE;
1732                 } else {
1733                         uresp.ma_sync_key =  0;
1734                 }
1735                 uresp.sq_key = ucontext->key;
1736                 ucontext->key += PAGE_SIZE;
1737                 uresp.rq_key = ucontext->key;
1738                 ucontext->key += PAGE_SIZE;
1739                 uresp.sq_db_gts_key = ucontext->key;
1740                 ucontext->key += PAGE_SIZE;
1741                 uresp.rq_db_gts_key = ucontext->key;
1742                 ucontext->key += PAGE_SIZE;
1743                 spin_unlock(&ucontext->mmap_lock);
1744                 ret = ib_copy_to_udata(udata, &uresp, sizeof uresp);
1745                 if (ret)
1746                         goto err8;
1747                 mm1->key = uresp.sq_key;
1748                 mm1->addr = qhp->wq.sq.phys_addr;
1749                 mm1->len = PAGE_ALIGN(qhp->wq.sq.memsize);
1750                 insert_mmap(ucontext, mm1);
1751                 mm2->key = uresp.rq_key;
1752                 mm2->addr = virt_to_phys(qhp->wq.rq.queue);
1753                 mm2->len = PAGE_ALIGN(qhp->wq.rq.memsize);
1754                 insert_mmap(ucontext, mm2);
1755                 mm3->key = uresp.sq_db_gts_key;
1756                 mm3->addr = (__force unsigned long) qhp->wq.sq.udb;
1757                 mm3->len = PAGE_SIZE;
1758                 insert_mmap(ucontext, mm3);
1759                 mm4->key = uresp.rq_db_gts_key;
1760                 mm4->addr = (__force unsigned long) qhp->wq.rq.udb;
1761                 mm4->len = PAGE_SIZE;
1762                 insert_mmap(ucontext, mm4);
1763                 if (mm5) {
1764                         mm5->key = uresp.ma_sync_key;
1765                         mm5->addr = (pci_resource_start(rhp->rdev.lldi.pdev, 0)
1766                                     + A_PCIE_MA_SYNC) & PAGE_MASK;
1767                         mm5->len = PAGE_SIZE;
1768                         insert_mmap(ucontext, mm5);
1769                 }
1770         }
1771         qhp->ibqp.qp_num = qhp->wq.sq.qid;
1772         init_timer(&(qhp->timer));
1773         INIT_LIST_HEAD(&qhp->db_fc_entry);
1774         PDBG("%s sq id %u size %u memsize %zu num_entries %u "
1775              "rq id %u size %u memsize %zu num_entries %u\n", __func__,
1776              qhp->wq.sq.qid, qhp->wq.sq.size, qhp->wq.sq.memsize,
1777              attrs->cap.max_send_wr, qhp->wq.rq.qid, qhp->wq.rq.size,
1778              qhp->wq.rq.memsize, attrs->cap.max_recv_wr);
1779         return &qhp->ibqp;
1780 err8:
1781         kfree(mm5);
1782 err7:
1783         kfree(mm4);
1784 err6:
1785         kfree(mm3);
1786 err5:
1787         kfree(mm2);
1788 err4:
1789         kfree(mm1);
1790 err3:
1791         remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid);
1792 err2:
1793         destroy_qp(&rhp->rdev, &qhp->wq,
1794                    ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1795 err1:
1796         kfree(qhp);
1797         return ERR_PTR(ret);
1798 }
1799
1800 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1801                       int attr_mask, struct ib_udata *udata)
1802 {
1803         struct c4iw_dev *rhp;
1804         struct c4iw_qp *qhp;
1805         enum c4iw_qp_attr_mask mask = 0;
1806         struct c4iw_qp_attributes attrs;
1807
1808         PDBG("%s ib_qp %p\n", __func__, ibqp);
1809
1810         /* iwarp does not support the RTR state */
1811         if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR))
1812                 attr_mask &= ~IB_QP_STATE;
1813
1814         /* Make sure we still have something left to do */
1815         if (!attr_mask)
1816                 return 0;
1817
1818         memset(&attrs, 0, sizeof attrs);
1819         qhp = to_c4iw_qp(ibqp);
1820         rhp = qhp->rhp;
1821
1822         attrs.next_state = c4iw_convert_state(attr->qp_state);
1823         attrs.enable_rdma_read = (attr->qp_access_flags &
1824                                IB_ACCESS_REMOTE_READ) ?  1 : 0;
1825         attrs.enable_rdma_write = (attr->qp_access_flags &
1826                                 IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
1827         attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0;
1828
1829
1830         mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0;
1831         mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ?
1832                         (C4IW_QP_ATTR_ENABLE_RDMA_READ |
1833                          C4IW_QP_ATTR_ENABLE_RDMA_WRITE |
1834                          C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0;
1835
1836         /*
1837          * Use SQ_PSN and RQ_PSN to pass in IDX_INC values for
1838          * ringing the queue db when we're in DB_FULL mode.
1839          * Only allow this on T4 devices.
1840          */
1841         attrs.sq_db_inc = attr->sq_psn;
1842         attrs.rq_db_inc = attr->rq_psn;
1843         mask |= (attr_mask & IB_QP_SQ_PSN) ? C4IW_QP_ATTR_SQ_DB : 0;
1844         mask |= (attr_mask & IB_QP_RQ_PSN) ? C4IW_QP_ATTR_RQ_DB : 0;
1845         if (is_t5(to_c4iw_qp(ibqp)->rhp->rdev.lldi.adapter_type) &&
1846             (mask & (C4IW_QP_ATTR_SQ_DB|C4IW_QP_ATTR_RQ_DB)))
1847                 return -EINVAL;
1848
1849         return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0);
1850 }
1851
1852 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn)
1853 {
1854         PDBG("%s ib_dev %p qpn 0x%x\n", __func__, dev, qpn);
1855         return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn);
1856 }
1857
1858 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1859                      int attr_mask, struct ib_qp_init_attr *init_attr)
1860 {
1861         struct c4iw_qp *qhp = to_c4iw_qp(ibqp);
1862
1863         memset(attr, 0, sizeof *attr);
1864         memset(init_attr, 0, sizeof *init_attr);
1865         attr->qp_state = to_ib_qp_state(qhp->attr.state);
1866         init_attr->cap.max_send_wr = qhp->attr.sq_num_entries;
1867         init_attr->cap.max_recv_wr = qhp->attr.rq_num_entries;
1868         init_attr->cap.max_send_sge = qhp->attr.sq_max_sges;
1869         init_attr->cap.max_recv_sge = qhp->attr.sq_max_sges;
1870         init_attr->cap.max_inline_data = T4_MAX_SEND_INLINE;
1871         init_attr->sq_sig_type = qhp->sq_sig_all ? IB_SIGNAL_ALL_WR : 0;
1872         return 0;
1873 }