sys/dev/cxgbe/iw_cxgbe/qp.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2009-2013 Chelsio, Inc. All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  */
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 #include "opt_inet.h"
  38
  39 #ifdef TCP_OFFLOAD
  40 #include <sys/types.h>
  41 #include <sys/malloc.h>
  42 #include <sys/socket.h>
  43 #include <sys/socketvar.h>
  44 #include <sys/sockio.h>
  45 #include <sys/taskqueue.h>
  46 #include <netinet/in.h>
  47 #include <net/route.h>
  48
  49 #include <netinet/in_systm.h>
  50 #include <netinet/in_pcb.h>
  51 #include <netinet/ip.h>
  52 #include <netinet/ip_var.h>
  53 #include <netinet/tcp_var.h>
  54 #include <netinet/tcp.h>
  55 #include <netinet/tcpip.h>
  56
  57 #include <netinet/toecore.h>
  58
  59 struct sge_iq;
  60 struct rss_header;
  61 struct cpl_set_tcb_rpl;
  62 #include <linux/types.h>
  63 #include "offload.h"
  64 #include "tom/t4_tom.h"
  65
  66 #include "iw_cxgbe.h"
  67 #include "user.h"
  68
  69 static int creds(struct toepcb *toep, struct inpcb *inp, size_t wrsize);
  70 static int max_fr_immd = T4_MAX_FR_IMMD;//SYSCTL parameter later...
  71
  72 static int alloc_ird(struct c4iw_dev *dev, u32 ird)
  73 {
  74         int ret = 0;
  75
  76         spin_lock_irq(&dev->lock);
  77         if (ird <= dev->avail_ird)
  78                 dev->avail_ird -= ird;
  79         else
  80                 ret = -ENOMEM;
  81         spin_unlock_irq(&dev->lock);
  82
  83         if (ret)
  84                 log(LOG_WARNING, "%s: device IRD resources exhausted\n",
  85                         device_get_nameunit(dev->rdev.adap->dev));
  86
  87         return ret;
  88 }
  89
  90 static void free_ird(struct c4iw_dev *dev, int ird)
  91 {
  92         spin_lock_irq(&dev->lock);
  93         dev->avail_ird += ird;
  94         spin_unlock_irq(&dev->lock);
  95 }
  96
  97 static void set_state(struct c4iw_qp *qhp, enum c4iw_qp_state state)
  98 {
  99         unsigned long flag;
 100         spin_lock_irqsave(&qhp->lock, flag);
 101         qhp->attr.state = state;
 102         spin_unlock_irqrestore(&qhp->lock, flag);
 103 }
 104
 105 static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
 106                       struct c4iw_dev_ucontext *uctx)
 107 {
 108         struct c4iw_dev *rhp = rdev_to_c4iw_dev(rdev);
 109         /*
 110          * uP clears EQ contexts when the connection exits rdma mode,
 111          * so no need to post a RESET WR for these EQs.
 112          */
 113         dma_free_coherent(rhp->ibdev.dma_device,
 114                         wq->rq.memsize, wq->rq.queue,
 115                         dma_unmap_addr(&wq->rq, mapping));
 116         dma_free_coherent(rhp->ibdev.dma_device,
 117                         wq->sq.memsize, wq->sq.queue,
 118                         dma_unmap_addr(&wq->sq, mapping));
 119         c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
 120         kfree(wq->rq.sw_rq);
 121         kfree(wq->sq.sw_sq);
 122         c4iw_put_qpid(rdev, wq->rq.qid, uctx);
 123         c4iw_put_qpid(rdev, wq->sq.qid, uctx);
 124         return 0;
 125 }
 126
 127 static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
 128                      struct t4_cq *rcq, struct t4_cq *scq,
 129                      struct c4iw_dev_ucontext *uctx)
 130 {
 131         struct adapter *sc = rdev->adap;
 132         struct c4iw_dev *rhp = rdev_to_c4iw_dev(rdev);
 133         int user = (uctx != &rdev->uctx);
 134         struct fw_ri_res_wr *res_wr;
 135         struct fw_ri_res *res;
 136         int wr_len;
 137         struct c4iw_wr_wait wr_wait;
 138         int ret = 0;
 139         int eqsize;
 140         struct wrqe *wr;
 141         u64 sq_bar2_qoffset = 0, rq_bar2_qoffset = 0;
 142
 143         wq->sq.qid = c4iw_get_qpid(rdev, uctx);
 144         if (!wq->sq.qid)
 145                 return -ENOMEM;
 146
 147         wq->rq.qid = c4iw_get_qpid(rdev, uctx);
 148         if (!wq->rq.qid) {
 149                 ret = -ENOMEM;
 150                 goto free_sq_qid;
 151         }
 152
 153         if (!user) {
 154                 wq->sq.sw_sq = kzalloc(wq->sq.size * sizeof *wq->sq.sw_sq,
 155                                  GFP_KERNEL);
 156                 if (!wq->sq.sw_sq) {
 157                         ret = -ENOMEM;
 158                         goto free_rq_qid;
 159                 }
 160
 161                 wq->rq.sw_rq = kzalloc(wq->rq.size * sizeof *wq->rq.sw_rq,
 162                                  GFP_KERNEL);
 163                 if (!wq->rq.sw_rq) {
 164                         ret = -ENOMEM;
 165                         goto free_sw_sq;
 166                 }
 167         }
 168
 169         /*
 170          * RQT must be a power of 2 and at least 16 deep.
 171          */
 172         wq->rq.rqt_size = roundup_pow_of_two(max_t(u16, wq->rq.size, 16));
 173         wq->rq.rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rq.rqt_size);
 174         if (!wq->rq.rqt_hwaddr) {
 175                 ret = -ENOMEM;
 176                 goto free_sw_rq;
 177         }
 178
 179         /*QP memory, allocate DMAable memory for Send & Receive Queues */
 180         wq->sq.queue = dma_alloc_coherent(rhp->ibdev.dma_device, wq->sq.memsize,
 181                                        &(wq->sq.dma_addr), GFP_KERNEL);
 182         if (!wq->sq.queue) {
 183                 ret = -ENOMEM;
 184                 goto free_hwaddr;
 185         }
 186         wq->sq.phys_addr = vtophys(wq->sq.queue);
 187         dma_unmap_addr_set(&wq->sq, mapping, wq->sq.dma_addr);
 188         memset(wq->sq.queue, 0, wq->sq.memsize);
 189
 190         wq->rq.queue = dma_alloc_coherent(rhp->ibdev.dma_device,
 191                         wq->rq.memsize, &(wq->rq.dma_addr), GFP_KERNEL);
 192         if (!wq->rq.queue) {
 193                 ret = -ENOMEM;
 194                 goto free_sq_dma;
 195         }
 196         wq->rq.phys_addr = vtophys(wq->rq.queue);
 197         dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr);
 198         memset(wq->rq.queue, 0, wq->rq.memsize);
 199
 200         CTR5(KTR_IW_CXGBE,
 201             "%s QP sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx",
 202             __func__,
 203             wq->sq.queue, (unsigned long long)wq->sq.phys_addr,
 204             wq->rq.queue, (unsigned long long)wq->rq.phys_addr);
 205
 206         /* Doorbell/WC regions, determine the BAR2 queue offset and qid. */
 207         t4_bar2_sge_qregs(rdev->adap, wq->sq.qid, T4_BAR2_QTYPE_EGRESS, user,
 208                         &sq_bar2_qoffset, &wq->sq.bar2_qid);
 209         t4_bar2_sge_qregs(rdev->adap, wq->rq.qid, T4_BAR2_QTYPE_EGRESS, user,
 210                         &rq_bar2_qoffset, &wq->rq.bar2_qid);
 211
 212         if (user) {
 213                 /* Compute BAR2 DB/WC physical address(page-aligned) for
 214                  * Userspace mapping.
 215                  */
 216                 wq->sq.bar2_pa = (rdev->bar2_pa + sq_bar2_qoffset) & PAGE_MASK;
 217                 wq->rq.bar2_pa = (rdev->bar2_pa + rq_bar2_qoffset) & PAGE_MASK;
 218                 CTR3(KTR_IW_CXGBE,
 219                         "%s BAR2 DB/WC sq base pa 0x%llx rq base pa 0x%llx",
 220                         __func__, (unsigned long long)wq->sq.bar2_pa,
 221                         (unsigned long long)wq->rq.bar2_pa);
 222         } else {
 223                 /* Compute BAR2 DB/WC virtual address to access in kernel. */
 224                 wq->sq.bar2_va = (void __iomem *)((u64)rdev->bar2_kva +
 225                                 sq_bar2_qoffset);
 226                 wq->rq.bar2_va = (void __iomem *)((u64)rdev->bar2_kva +
 227                                 rq_bar2_qoffset);
 228                 CTR3(KTR_IW_CXGBE, "%s BAR2 DB/WC sq base va %p rq base va %p",
 229                         __func__, (unsigned long long)wq->sq.bar2_va,
 230                         (unsigned long long)wq->rq.bar2_va);
 231         }
 232
 233         wq->rdev = rdev;
 234         wq->rq.msn = 1;
 235
 236         /* build fw_ri_res_wr */
 237         wr_len = sizeof *res_wr + 2 * sizeof *res;
 238
 239         wr = alloc_wrqe(wr_len, &sc->sge.ctrlq[0]);
 240         if (wr == NULL) {
 241                 ret = -ENOMEM;
 242                 goto free_rq_dma;
 243         }
 244         res_wr = wrtod(wr);
 245
 246         memset(res_wr, 0, wr_len);
 247         res_wr->op_nres = cpu_to_be32(
 248                         V_FW_WR_OP(FW_RI_RES_WR) |
 249                         V_FW_RI_RES_WR_NRES(2) |
 250                         F_FW_WR_COMPL);
 251         res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16));
 252         res_wr->cookie = (unsigned long) &wr_wait;
 253         res = res_wr->res;
 254         res->u.sqrq.restype = FW_RI_RES_TYPE_SQ;
 255         res->u.sqrq.op = FW_RI_RES_OP_WRITE;
 256
 257         /* eqsize is the number of 64B entries plus the status page size. */
 258         eqsize = wq->sq.size * T4_SQ_NUM_SLOTS +
 259                         rdev->hw_queue.t4_eq_status_entries;
 260
 261         res->u.sqrq.fetchszm_to_iqid = cpu_to_be32(
 262                 V_FW_RI_RES_WR_HOSTFCMODE(0) |  /* no host cidx updates */
 263                 V_FW_RI_RES_WR_CPRIO(0) |       /* don't keep in chip cache */
 264                 V_FW_RI_RES_WR_PCIECHN(0) |     /* set by uP at ri_init time */
 265                 V_FW_RI_RES_WR_IQID(scq->cqid));
 266         res->u.sqrq.dcaen_to_eqsize = cpu_to_be32(
 267                 V_FW_RI_RES_WR_DCAEN(0) |
 268                 V_FW_RI_RES_WR_DCACPU(0) |
 269                 V_FW_RI_RES_WR_FBMIN(2) |
 270                 V_FW_RI_RES_WR_FBMAX(3) |
 271                 V_FW_RI_RES_WR_CIDXFTHRESHO(0) |
 272                 V_FW_RI_RES_WR_CIDXFTHRESH(0) |
 273                 V_FW_RI_RES_WR_EQSIZE(eqsize));
 274         res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid);
 275         res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr);
 276         res++;
 277         res->u.sqrq.restype = FW_RI_RES_TYPE_RQ;
 278         res->u.sqrq.op = FW_RI_RES_OP_WRITE;
 279
 280         /* eqsize is the number of 64B entries plus the status page size. */
 281         eqsize = wq->rq.size * T4_RQ_NUM_SLOTS +
 282                         rdev->hw_queue.t4_eq_status_entries;
 283         res->u.sqrq.fetchszm_to_iqid = cpu_to_be32(
 284                 V_FW_RI_RES_WR_HOSTFCMODE(0) |  /* no host cidx updates */
 285                 V_FW_RI_RES_WR_CPRIO(0) |       /* don't keep in chip cache */
 286                 V_FW_RI_RES_WR_PCIECHN(0) |     /* set by uP at ri_init time */
 287                 V_FW_RI_RES_WR_IQID(rcq->cqid));
 288         res->u.sqrq.dcaen_to_eqsize = cpu_to_be32(
 289                 V_FW_RI_RES_WR_DCAEN(0) |
 290                 V_FW_RI_RES_WR_DCACPU(0) |
 291                 V_FW_RI_RES_WR_FBMIN(2) |
 292                 V_FW_RI_RES_WR_FBMAX(3) |
 293                 V_FW_RI_RES_WR_CIDXFTHRESHO(0) |
 294                 V_FW_RI_RES_WR_CIDXFTHRESH(0) |
 295                 V_FW_RI_RES_WR_EQSIZE(eqsize));
 296         res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid);
 297         res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr);
 298
 299         c4iw_init_wr_wait(&wr_wait);
 300
 301         t4_wrq_tx(sc, wr);
 302         ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, wq->sq.qid,
 303                         NULL, __func__);
 304         if (ret)
 305                 goto free_rq_dma;
 306
 307         CTR5(KTR_IW_CXGBE,
 308             "%s sqid 0x%x rqid 0x%x kdb 0x%p squdb 0x%llx rqudb 0x%llx",
 309             __func__, wq->sq.qid, wq->rq.qid,
 310             (unsigned long long)wq->sq.bar2_va,
 311             (unsigned long long)wq->rq.bar2_va);
 312
 313         return 0;
 314 free_rq_dma:
 315         dma_free_coherent(rhp->ibdev.dma_device,
 316                           wq->rq.memsize, wq->rq.queue,
 317                           dma_unmap_addr(&wq->rq, mapping));
 318 free_sq_dma:
 319         dma_free_coherent(rhp->ibdev.dma_device,
 320                           wq->sq.memsize, wq->sq.queue,
 321                           dma_unmap_addr(&wq->sq, mapping));
 322 free_hwaddr:
 323         c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
 324 free_sw_rq:
 325         kfree(wq->rq.sw_rq);
 326 free_sw_sq:
 327         kfree(wq->sq.sw_sq);
 328 free_rq_qid:
 329         c4iw_put_qpid(rdev, wq->rq.qid, uctx);
 330 free_sq_qid:
 331         c4iw_put_qpid(rdev, wq->sq.qid, uctx);
 332         return ret;
 333 }
 334
 335 static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp,
 336                       struct ib_send_wr *wr, int max, u32 *plenp)
 337 {
 338         u8 *dstp, *srcp;
 339         u32 plen = 0;
 340         int i;
 341         int rem, len;
 342
 343         dstp = (u8 *)immdp->data;
 344         for (i = 0; i < wr->num_sge; i++) {
 345                 if ((plen + wr->sg_list[i].length) > max)
 346                         return -EMSGSIZE;
 347                 srcp = (u8 *)(unsigned long)wr->sg_list[i].addr;
 348                 plen += wr->sg_list[i].length;
 349                 rem = wr->sg_list[i].length;
 350                 while (rem) {
 351                         if (dstp == (u8 *)&sq->queue[sq->size])
 352                                 dstp = (u8 *)sq->queue;
 353                         if (rem <= (u8 *)&sq->queue[sq->size] - dstp)
 354                                 len = rem;
 355                         else
 356                                 len = (u8 *)&sq->queue[sq->size] - dstp;
 357                         memcpy(dstp, srcp, len);
 358                         dstp += len;
 359                         srcp += len;
 360                         rem -= len;
 361                 }
 362         }
 363         len = roundup(plen + sizeof *immdp, 16) - (plen + sizeof *immdp);
 364         if (len)
 365                 memset(dstp, 0, len);
 366         immdp->op = FW_RI_DATA_IMMD;
 367         immdp->r1 = 0;
 368         immdp->r2 = 0;
 369         immdp->immdlen = cpu_to_be32(plen);
 370         *plenp = plen;
 371         return 0;
 372 }
 373
 374 static int build_isgl(__be64 *queue_start, __be64 *queue_end,
 375                       struct fw_ri_isgl *isglp, struct ib_sge *sg_list,
 376                       int num_sge, u32 *plenp)
 377
 378 {
 379         int i;
 380         u32 plen = 0;
 381         __be64 *flitp = (__be64 *)isglp->sge;
 382
 383         for (i = 0; i < num_sge; i++) {
 384                 if ((plen + sg_list[i].length) < plen)
 385                         return -EMSGSIZE;
 386                 plen += sg_list[i].length;
 387                 *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) |
 388                                      sg_list[i].length);
 389                 if (++flitp == queue_end)
 390                         flitp = queue_start;
 391                 *flitp = cpu_to_be64(sg_list[i].addr);
 392                 if (++flitp == queue_end)
 393                         flitp = queue_start;
 394         }
 395         *flitp = (__force __be64)0;
 396         isglp->op = FW_RI_DATA_ISGL;
 397         isglp->r1 = 0;
 398         isglp->nsge = cpu_to_be16(num_sge);
 399         isglp->r2 = 0;
 400         if (plenp)
 401                 *plenp = plen;
 402         return 0;
 403 }
 404
 405 static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe,
 406                            struct ib_send_wr *wr, u8 *len16)
 407 {
 408         u32 plen;
 409         int size;
 410         int ret;
 411
 412         if (wr->num_sge > T4_MAX_SEND_SGE)
 413                 return -EINVAL;
 414         switch (wr->opcode) {
 415         case IB_WR_SEND:
 416                 if (wr->send_flags & IB_SEND_SOLICITED)
 417                         wqe->send.sendop_pkd = cpu_to_be32(
 418                                 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE));
 419                 else
 420                         wqe->send.sendop_pkd = cpu_to_be32(
 421                                 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND));
 422                 wqe->send.stag_inv = 0;
 423                 break;
 424         case IB_WR_SEND_WITH_INV:
 425                 if (wr->send_flags & IB_SEND_SOLICITED)
 426                         wqe->send.sendop_pkd = cpu_to_be32(
 427                                 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE_INV));
 428                 else
 429                         wqe->send.sendop_pkd = cpu_to_be32(
 430                                 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_INV));
 431                 wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey);
 432                 break;
 433
 434         default:
 435                 return -EINVAL;
 436         }
 437         wqe->send.r3 = 0;
 438         wqe->send.r4 = 0;
 439
 440         plen = 0;
 441         if (wr->num_sge) {
 442                 if (wr->send_flags & IB_SEND_INLINE) {
 443                         ret = build_immd(sq, wqe->send.u.immd_src, wr,
 444                                          T4_MAX_SEND_INLINE, &plen);
 445                         if (ret)
 446                                 return ret;
 447                         size = sizeof wqe->send + sizeof(struct fw_ri_immd) +
 448                                plen;
 449                 } else {
 450                         ret = build_isgl((__be64 *)sq->queue,
 451                                          (__be64 *)&sq->queue[sq->size],
 452                                          wqe->send.u.isgl_src,
 453                                          wr->sg_list, wr->num_sge, &plen);
 454                         if (ret)
 455                                 return ret;
 456                         size = sizeof wqe->send + sizeof(struct fw_ri_isgl) +
 457                                wr->num_sge * sizeof(struct fw_ri_sge);
 458                 }
 459         } else {
 460                 wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD;
 461                 wqe->send.u.immd_src[0].r1 = 0;
 462                 wqe->send.u.immd_src[0].r2 = 0;
 463                 wqe->send.u.immd_src[0].immdlen = 0;
 464                 size = sizeof wqe->send + sizeof(struct fw_ri_immd);
 465                 plen = 0;
 466         }
 467         *len16 = DIV_ROUND_UP(size, 16);
 468         wqe->send.plen = cpu_to_be32(plen);
 469         return 0;
 470 }
 471
 472 static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe,
 473                             struct ib_send_wr *wr, u8 *len16)
 474 {
 475         u32 plen;
 476         int size;
 477         int ret;
 478
 479         if (wr->num_sge > T4_MAX_SEND_SGE)
 480                 return -EINVAL;
 481         wqe->write.immd_data = 0;
 482         wqe->write.stag_sink = cpu_to_be32(rdma_wr(wr)->rkey);
 483         wqe->write.to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr);
 484         if (wr->num_sge) {
 485                 if (wr->send_flags & IB_SEND_INLINE) {
 486                         ret = build_immd(sq, wqe->write.u.immd_src, wr,
 487                                          T4_MAX_WRITE_INLINE, &plen);
 488                         if (ret)
 489                                 return ret;
 490                         size = sizeof wqe->write + sizeof(struct fw_ri_immd) +
 491                                plen;
 492                 } else {
 493                         ret = build_isgl((__be64 *)sq->queue,
 494                                          (__be64 *)&sq->queue[sq->size],
 495                                          wqe->write.u.isgl_src,
 496                                          wr->sg_list, wr->num_sge, &plen);
 497                         if (ret)
 498                                 return ret;
 499                         size = sizeof wqe->write + sizeof(struct fw_ri_isgl) +
 500                                wr->num_sge * sizeof(struct fw_ri_sge);
 501                 }
 502         } else {
 503                 wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD;
 504                 wqe->write.u.immd_src[0].r1 = 0;
 505                 wqe->write.u.immd_src[0].r2 = 0;
 506                 wqe->write.u.immd_src[0].immdlen = 0;
 507                 size = sizeof wqe->write + sizeof(struct fw_ri_immd);
 508                 plen = 0;
 509         }
 510         *len16 = DIV_ROUND_UP(size, 16);
 511         wqe->write.plen = cpu_to_be32(plen);
 512         return 0;
 513 }
 514
 515 static int build_rdma_read(union t4_wr *wqe, struct ib_send_wr *wr, u8 *len16)
 516 {
 517         if (wr->num_sge > 1)
 518                 return -EINVAL;
 519         if (wr->num_sge && wr->sg_list[0].length) {
 520                 wqe->read.stag_src = cpu_to_be32(rdma_wr(wr)->rkey);
 521                 wqe->read.to_src_hi = cpu_to_be32((u32)(rdma_wr(wr)->remote_addr
 522                                                         >> 32));
 523                 wqe->read.to_src_lo =
 524                         cpu_to_be32((u32)rdma_wr(wr)->remote_addr);
 525                 wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey);
 526                 wqe->read.plen = cpu_to_be32(wr->sg_list[0].length);
 527                 wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr
 528                                                          >> 32));
 529                 wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr));
 530         } else {
 531                 wqe->read.stag_src = cpu_to_be32(2);
 532                 wqe->read.to_src_hi = 0;
 533                 wqe->read.to_src_lo = 0;
 534                 wqe->read.stag_sink = cpu_to_be32(2);
 535                 wqe->read.plen = 0;
 536                 wqe->read.to_sink_hi = 0;
 537                 wqe->read.to_sink_lo = 0;
 538         }
 539         wqe->read.r2 = 0;
 540         wqe->read.r5 = 0;
 541         *len16 = DIV_ROUND_UP(sizeof wqe->read, 16);
 542         return 0;
 543 }
 544
 545 static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe,
 546                            struct ib_recv_wr *wr, u8 *len16)
 547 {
 548         int ret;
 549
 550         ret = build_isgl((__be64 *)qhp->wq.rq.queue,
 551                          (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size],
 552                          &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL);
 553         if (ret)
 554                 return ret;
 555         *len16 = DIV_ROUND_UP(sizeof wqe->recv +
 556                               wr->num_sge * sizeof(struct fw_ri_sge), 16);
 557         return 0;
 558 }
 559
 560 static int build_inv_stag(union t4_wr *wqe, struct ib_send_wr *wr,
 561                           u8 *len16)
 562 {
 563         wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey);
 564         wqe->inv.r2 = 0;
 565         *len16 = DIV_ROUND_UP(sizeof wqe->inv, 16);
 566         return 0;
 567 }
 568
 569 static void free_qp_work(struct work_struct *work)
 570 {
 571         struct c4iw_ucontext *ucontext;
 572         struct c4iw_qp *qhp;
 573         struct c4iw_dev *rhp;
 574
 575         qhp = container_of(work, struct c4iw_qp, free_work);
 576         ucontext = qhp->ucontext;
 577         rhp = qhp->rhp;
 578
 579         CTR3(KTR_IW_CXGBE, "%s qhp %p ucontext %p", __func__,
 580                         qhp, ucontext);
 581         destroy_qp(&rhp->rdev, &qhp->wq,
 582                    ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
 583
 584         if (ucontext)
 585                 c4iw_put_ucontext(ucontext);
 586         kfree(qhp);
 587 }
 588
 589 static void queue_qp_free(struct kref *kref)
 590 {
 591         struct c4iw_qp *qhp;
 592
 593         qhp = container_of(kref, struct c4iw_qp, kref);
 594         CTR2(KTR_IW_CXGBE, "%s qhp %p", __func__, qhp);
 595         queue_work(qhp->rhp->rdev.free_workq, &qhp->free_work);
 596 }
 597
 598 void c4iw_qp_add_ref(struct ib_qp *qp)
 599 {
 600         CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, qp);
 601         kref_get(&to_c4iw_qp(qp)->kref);
 602 }
 603
 604 void c4iw_qp_rem_ref(struct ib_qp *qp)
 605 {
 606         CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, qp);
 607         kref_put(&to_c4iw_qp(qp)->kref, queue_qp_free);
 608 }
 609
 610 static void complete_sq_drain_wr(struct c4iw_qp *qhp, struct ib_send_wr *wr)
 611 {
 612         struct t4_cqe cqe = {};
 613         struct c4iw_cq *schp;
 614         unsigned long flag;
 615         struct t4_cq *cq;
 616
 617         schp = to_c4iw_cq(qhp->ibqp.send_cq);
 618         cq = &schp->cq;
 619
 620         PDBG("%s drain sq id %u\n", __func__, qhp->wq.sq.qid);
 621         cqe.u.drain_cookie = wr->wr_id;
 622         cqe.header = cpu_to_be32(V_CQE_STATUS(T4_ERR_SWFLUSH) |
 623                                  V_CQE_OPCODE(C4IW_DRAIN_OPCODE) |
 624                                  V_CQE_TYPE(1) |
 625                                  V_CQE_SWCQE(1) |
 626                                  V_CQE_QPID(qhp->wq.sq.qid));
 627
 628         spin_lock_irqsave(&schp->lock, flag);
 629         cqe.bits_type_ts = cpu_to_be64(V_CQE_GENBIT((u64)cq->gen));
 630         cq->sw_queue[cq->sw_pidx] = cqe;
 631         t4_swcq_produce(cq);
 632         spin_unlock_irqrestore(&schp->lock, flag);
 633
 634         spin_lock_irqsave(&schp->comp_handler_lock, flag);
 635         (*schp->ibcq.comp_handler)(&schp->ibcq,
 636                                    schp->ibcq.cq_context);
 637         spin_unlock_irqrestore(&schp->comp_handler_lock, flag);
 638 }
 639
 640 static void complete_rq_drain_wr(struct c4iw_qp *qhp, struct ib_recv_wr *wr)
 641 {
 642         struct t4_cqe cqe = {};
 643         struct c4iw_cq *rchp;
 644         unsigned long flag;
 645         struct t4_cq *cq;
 646
 647         rchp = to_c4iw_cq(qhp->ibqp.recv_cq);
 648         cq = &rchp->cq;
 649
 650         PDBG("%s drain rq id %u\n", __func__, qhp->wq.sq.qid);
 651         cqe.u.drain_cookie = wr->wr_id;
 652         cqe.header = cpu_to_be32(V_CQE_STATUS(T4_ERR_SWFLUSH) |
 653                                  V_CQE_OPCODE(C4IW_DRAIN_OPCODE) |
 654                                  V_CQE_TYPE(0) |
 655                                  V_CQE_SWCQE(1) |
 656                                  V_CQE_QPID(qhp->wq.sq.qid));
 657
 658         spin_lock_irqsave(&rchp->lock, flag);
 659         cqe.bits_type_ts = cpu_to_be64(V_CQE_GENBIT((u64)cq->gen));
 660         cq->sw_queue[cq->sw_pidx] = cqe;
 661         t4_swcq_produce(cq);
 662         spin_unlock_irqrestore(&rchp->lock, flag);
 663
 664         spin_lock_irqsave(&rchp->comp_handler_lock, flag);
 665         (*rchp->ibcq.comp_handler)(&rchp->ibcq,
 666                                    rchp->ibcq.cq_context);
 667         spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
 668 }
 669
 670 static void build_tpte_memreg(struct fw_ri_fr_nsmr_tpte_wr *fr,
 671                 struct ib_reg_wr *wr, struct c4iw_mr *mhp, u8 *len16)
 672 {
 673         __be64 *p = (__be64 *)fr->pbl;
 674
 675         fr->r2 = cpu_to_be32(0);
 676         fr->stag = cpu_to_be32(mhp->ibmr.rkey);
 677
 678         fr->tpte.valid_to_pdid = cpu_to_be32(F_FW_RI_TPTE_VALID |
 679                         V_FW_RI_TPTE_STAGKEY((mhp->ibmr.rkey & M_FW_RI_TPTE_STAGKEY)) |
 680                         V_FW_RI_TPTE_STAGSTATE(1) |
 681                         V_FW_RI_TPTE_STAGTYPE(FW_RI_STAG_NSMR) |
 682                         V_FW_RI_TPTE_PDID(mhp->attr.pdid));
 683         fr->tpte.locread_to_qpid = cpu_to_be32(
 684                         V_FW_RI_TPTE_PERM(c4iw_ib_to_tpt_access(wr->access)) |
 685                         V_FW_RI_TPTE_ADDRTYPE(FW_RI_VA_BASED_TO) |
 686                         V_FW_RI_TPTE_PS(ilog2(wr->mr->page_size) - 12));
 687         fr->tpte.nosnoop_pbladdr = cpu_to_be32(V_FW_RI_TPTE_PBLADDR(
 688                               PBL_OFF(&mhp->rhp->rdev, mhp->attr.pbl_addr)>>3));
 689         fr->tpte.dca_mwbcnt_pstag = cpu_to_be32(0);
 690         fr->tpte.len_hi = cpu_to_be32(0);
 691         fr->tpte.len_lo = cpu_to_be32(mhp->ibmr.length);
 692         fr->tpte.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32);
 693         fr->tpte.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 0xffffffff);
 694
 695         p[0] = cpu_to_be64((u64)mhp->mpl[0]);
 696         p[1] = cpu_to_be64((u64)mhp->mpl[1]);
 697
 698         *len16 = DIV_ROUND_UP(sizeof(*fr), 16);
 699 }
 700
 701 static int build_memreg(struct t4_sq *sq, union t4_wr *wqe,
 702                 struct ib_reg_wr *wr, struct c4iw_mr *mhp, u8 *len16,
 703                 bool dsgl_supported)
 704 {
 705         struct fw_ri_immd *imdp;
 706         __be64 *p;
 707         int i;
 708         int pbllen = roundup(mhp->mpl_len * sizeof(u64), 32);
 709         int rem;
 710
 711         if (mhp->mpl_len > t4_max_fr_depth(use_dsgl && dsgl_supported))
 712                 return -EINVAL;
 713
 714         wqe->fr.qpbinde_to_dcacpu = 0;
 715         wqe->fr.pgsz_shift = ilog2(wr->mr->page_size) - 12;
 716         wqe->fr.addr_type = FW_RI_VA_BASED_TO;
 717         wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->access);
 718         wqe->fr.len_hi = 0;
 719         wqe->fr.len_lo = cpu_to_be32(mhp->ibmr.length);
 720         wqe->fr.stag = cpu_to_be32(wr->key);
 721         wqe->fr.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32);
 722         wqe->fr.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova &
 723                         0xffffffff);
 724
 725         if (dsgl_supported && use_dsgl && (pbllen > max_fr_immd)) {
 726                 struct fw_ri_dsgl *sglp;
 727
 728                 for (i = 0; i < mhp->mpl_len; i++)
 729                         mhp->mpl[i] =
 730                                      (__force u64)cpu_to_be64((u64)mhp->mpl[i]);
 731
 732                 sglp = (struct fw_ri_dsgl *)(&wqe->fr + 1);
 733                 sglp->op = FW_RI_DATA_DSGL;
 734                 sglp->r1 = 0;
 735                 sglp->nsge = cpu_to_be16(1);
 736                 sglp->addr0 = cpu_to_be64(mhp->mpl_addr);
 737                 sglp->len0 = cpu_to_be32(pbllen);
 738
 739                 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*sglp), 16);
 740         } else {
 741                 imdp = (struct fw_ri_immd *)(&wqe->fr + 1);
 742                 imdp->op = FW_RI_DATA_IMMD;
 743                 imdp->r1 = 0;
 744                 imdp->r2 = 0;
 745                 imdp->immdlen = cpu_to_be32(pbllen);
 746                 p = (__be64 *)(imdp + 1);
 747                 rem = pbllen;
 748                 for (i = 0; i < mhp->mpl_len; i++) {
 749                         *p = cpu_to_be64((u64)mhp->mpl[i]);
 750                         rem -= sizeof(*p);
 751                         if (++p == (__be64 *)&sq->queue[sq->size])
 752                                 p = (__be64 *)sq->queue;
 753                 }
 754                 BUG_ON(rem < 0);
 755                 while (rem) {
 756                         *p = 0;
 757                         rem -= sizeof(*p);
 758                         if (++p == (__be64 *)&sq->queue[sq->size])
 759                                 p = (__be64 *)sq->queue;
 760                 }
 761                 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*imdp)
 762                                 + pbllen, 16);
 763         }
 764
 765         return 0;
 766 }
 767
 768 int c4iw_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 769                    struct ib_send_wr **bad_wr)
 770 {
 771         int err = 0;
 772         u8 len16 = 0;
 773         enum fw_wr_opcodes fw_opcode = 0;
 774         enum fw_ri_wr_flags fw_flags;
 775         struct c4iw_qp *qhp;
 776         union t4_wr *wqe = NULL;
 777         u32 num_wrs;
 778         struct t4_swsqe *swsqe;
 779         unsigned long flag;
 780         u16 idx = 0;
 781         struct c4iw_rdev *rdev;
 782
 783         qhp = to_c4iw_qp(ibqp);
 784         rdev = &qhp->rhp->rdev;
 785         spin_lock_irqsave(&qhp->lock, flag);
 786         if (t4_wq_in_error(&qhp->wq)) {
 787                 spin_unlock_irqrestore(&qhp->lock, flag);
 788                 complete_sq_drain_wr(qhp, wr);
 789                 return err;
 790         }
 791         num_wrs = t4_sq_avail(&qhp->wq);
 792         if (num_wrs == 0) {
 793                 spin_unlock_irqrestore(&qhp->lock, flag);
 794                 *bad_wr = wr;
 795                 return -ENOMEM;
 796         }
 797         while (wr) {
 798                 if (num_wrs == 0) {
 799                         err = -ENOMEM;
 800                         *bad_wr = wr;
 801                         break;
 802                 }
 803                 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue +
 804                       qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE);
 805
 806                 fw_flags = 0;
 807                 if (wr->send_flags & IB_SEND_SOLICITED)
 808                         fw_flags |= FW_RI_SOLICITED_EVENT_FLAG;
 809                 if (wr->send_flags & IB_SEND_SIGNALED || qhp->sq_sig_all)
 810                         fw_flags |= FW_RI_COMPLETION_FLAG;
 811                 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx];
 812                 switch (wr->opcode) {
 813                 case IB_WR_SEND_WITH_INV:
 814                 case IB_WR_SEND:
 815                         if (wr->send_flags & IB_SEND_FENCE)
 816                                 fw_flags |= FW_RI_READ_FENCE_FLAG;
 817                         fw_opcode = FW_RI_SEND_WR;
 818                         if (wr->opcode == IB_WR_SEND)
 819                                 swsqe->opcode = FW_RI_SEND;
 820                         else
 821                                 swsqe->opcode = FW_RI_SEND_WITH_INV;
 822                         err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16);
 823                         break;
 824                 case IB_WR_RDMA_WRITE:
 825                         fw_opcode = FW_RI_RDMA_WRITE_WR;
 826                         swsqe->opcode = FW_RI_RDMA_WRITE;
 827                         err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16);
 828                         break;
 829                 case IB_WR_RDMA_READ:
 830                 case IB_WR_RDMA_READ_WITH_INV:
 831                         fw_opcode = FW_RI_RDMA_READ_WR;
 832                         swsqe->opcode = FW_RI_READ_REQ;
 833                         if (wr->opcode == IB_WR_RDMA_READ_WITH_INV) {
 834                                 c4iw_invalidate_mr(qhp->rhp,
 835                                                    wr->sg_list[0].lkey);
 836                                 fw_flags = FW_RI_RDMA_READ_INVALIDATE;
 837                         } else {
 838                                 fw_flags = 0;
 839                         }
 840                         err = build_rdma_read(wqe, wr, &len16);
 841                         if (err)
 842                                 break;
 843                         swsqe->read_len = wr->sg_list[0].length;
 844                         if (!qhp->wq.sq.oldest_read)
 845                                 qhp->wq.sq.oldest_read = swsqe;
 846                         break;
 847                 case IB_WR_REG_MR: {
 848                         struct c4iw_mr *mhp = to_c4iw_mr(reg_wr(wr)->mr);
 849
 850                         swsqe->opcode = FW_RI_FAST_REGISTER;
 851                         if (rdev->adap->params.fr_nsmr_tpte_wr_support &&
 852                                         !mhp->attr.state && mhp->mpl_len <= 2) {
 853                                 fw_opcode = FW_RI_FR_NSMR_TPTE_WR;
 854                                 build_tpte_memreg(&wqe->fr_tpte, reg_wr(wr),
 855                                                 mhp, &len16);
 856                         } else {
 857                                 fw_opcode = FW_RI_FR_NSMR_WR;
 858                                 err = build_memreg(&qhp->wq.sq, wqe, reg_wr(wr),
 859                                         mhp, &len16,
 860                                         rdev->adap->params.ulptx_memwrite_dsgl);
 861                                 if (err)
 862                                         break;
 863                         }
 864                         mhp->attr.state = 1;
 865                         break;
 866                 }
 867                 case IB_WR_LOCAL_INV:
 868                         if (wr->send_flags & IB_SEND_FENCE)
 869                                 fw_flags |= FW_RI_LOCAL_FENCE_FLAG;
 870                         fw_opcode = FW_RI_INV_LSTAG_WR;
 871                         swsqe->opcode = FW_RI_LOCAL_INV;
 872                         err = build_inv_stag(wqe, wr, &len16);
 873                         c4iw_invalidate_mr(qhp->rhp, wr->ex.invalidate_rkey);
 874                         break;
 875                 default:
 876                         CTR2(KTR_IW_CXGBE, "%s post of type =%d TBD!", __func__,
 877                              wr->opcode);
 878                         err = -EINVAL;
 879                 }
 880                 if (err) {
 881                         *bad_wr = wr;
 882                         break;
 883                 }
 884                 swsqe->idx = qhp->wq.sq.pidx;
 885                 swsqe->complete = 0;
 886                 swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED) ||
 887                                         qhp->sq_sig_all;
 888                 swsqe->flushed = 0;
 889                 swsqe->wr_id = wr->wr_id;
 890
 891                 init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16);
 892
 893                 CTR5(KTR_IW_CXGBE,
 894                     "%s cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u",
 895                     __func__, (unsigned long long)wr->wr_id, qhp->wq.sq.pidx,
 896                     swsqe->opcode, swsqe->read_len);
 897                 wr = wr->next;
 898                 num_wrs--;
 899                 t4_sq_produce(&qhp->wq, len16);
 900                 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
 901         }
 902
 903         t4_ring_sq_db(&qhp->wq, idx, wqe, rdev->adap->iwt.wc_en);
 904         spin_unlock_irqrestore(&qhp->lock, flag);
 905         return err;
 906 }
 907
 908 int c4iw_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 909                       struct ib_recv_wr **bad_wr)
 910 {
 911         int err = 0;
 912         struct c4iw_qp *qhp;
 913         union t4_recv_wr *wqe = NULL;
 914         u32 num_wrs;
 915         u8 len16 = 0;
 916         unsigned long flag;
 917         u16 idx = 0;
 918
 919         qhp = to_c4iw_qp(ibqp);
 920         spin_lock_irqsave(&qhp->lock, flag);
 921         if (t4_wq_in_error(&qhp->wq)) {
 922                 spin_unlock_irqrestore(&qhp->lock, flag);
 923                 complete_rq_drain_wr(qhp, wr);
 924                 return err;
 925         }
 926         num_wrs = t4_rq_avail(&qhp->wq);
 927         if (num_wrs == 0) {
 928                 spin_unlock_irqrestore(&qhp->lock, flag);
 929                 *bad_wr = wr;
 930                 return -ENOMEM;
 931         }
 932         while (wr) {
 933                 if (wr->num_sge > T4_MAX_RECV_SGE) {
 934                         err = -EINVAL;
 935                         *bad_wr = wr;
 936                         break;
 937                 }
 938                 wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue +
 939                                            qhp->wq.rq.wq_pidx *
 940                                            T4_EQ_ENTRY_SIZE);
 941                 if (num_wrs)
 942                         err = build_rdma_recv(qhp, wqe, wr, &len16);
 943                 else
 944                         err = -ENOMEM;
 945                 if (err) {
 946                         *bad_wr = wr;
 947                         break;
 948                 }
 949
 950                 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id;
 951
 952                 wqe->recv.opcode = FW_RI_RECV_WR;
 953                 wqe->recv.r1 = 0;
 954                 wqe->recv.wrid = qhp->wq.rq.pidx;
 955                 wqe->recv.r2[0] = 0;
 956                 wqe->recv.r2[1] = 0;
 957                 wqe->recv.r2[2] = 0;
 958                 wqe->recv.len16 = len16;
 959                 CTR3(KTR_IW_CXGBE, "%s cookie 0x%llx pidx %u", __func__,
 960                      (unsigned long long) wr->wr_id, qhp->wq.rq.pidx);
 961                 t4_rq_produce(&qhp->wq, len16);
 962                 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
 963                 wr = wr->next;
 964                 num_wrs--;
 965         }
 966
 967         t4_ring_rq_db(&qhp->wq, idx, wqe, qhp->rhp->rdev.adap->iwt.wc_en);
 968         spin_unlock_irqrestore(&qhp->lock, flag);
 969         return err;
 970 }
 971
 972 static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type,
 973                                     u8 *ecode)
 974 {
 975         int status;
 976         int tagged;
 977         int opcode;
 978         int rqtype;
 979         int send_inv;
 980
 981         if (!err_cqe) {
 982                 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
 983                 *ecode = 0;
 984                 return;
 985         }
 986
 987         status = CQE_STATUS(err_cqe);
 988         opcode = CQE_OPCODE(err_cqe);
 989         rqtype = RQ_TYPE(err_cqe);
 990         send_inv = (opcode == FW_RI_SEND_WITH_INV) ||
 991                    (opcode == FW_RI_SEND_WITH_SE_INV);
 992         tagged = (opcode == FW_RI_RDMA_WRITE) ||
 993                  (rqtype && (opcode == FW_RI_READ_RESP));
 994
 995         switch (status) {
 996         case T4_ERR_STAG:
 997                 if (send_inv) {
 998                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
 999                         *ecode = RDMAP_CANT_INV_STAG;
1000                 } else {
1001                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
1002                         *ecode = RDMAP_INV_STAG;
1003                 }
1004                 break;
1005         case T4_ERR_PDID:
1006                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
1007                 if ((opcode == FW_RI_SEND_WITH_INV) ||
1008                     (opcode == FW_RI_SEND_WITH_SE_INV))
1009                         *ecode = RDMAP_CANT_INV_STAG;
1010                 else
1011                         *ecode = RDMAP_STAG_NOT_ASSOC;
1012                 break;
1013         case T4_ERR_QPID:
1014                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
1015                 *ecode = RDMAP_STAG_NOT_ASSOC;
1016                 break;
1017         case T4_ERR_ACCESS:
1018                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
1019                 *ecode = RDMAP_ACC_VIOL;
1020                 break;
1021         case T4_ERR_WRAP:
1022                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
1023                 *ecode = RDMAP_TO_WRAP;
1024                 break;
1025         case T4_ERR_BOUND:
1026                 if (tagged) {
1027                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
1028                         *ecode = DDPT_BASE_BOUNDS;
1029                 } else {
1030                         *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
1031                         *ecode = RDMAP_BASE_BOUNDS;
1032                 }
1033                 break;
1034         case T4_ERR_INVALIDATE_SHARED_MR:
1035         case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND:
1036                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
1037                 *ecode = RDMAP_CANT_INV_STAG;
1038                 break;
1039         case T4_ERR_ECC:
1040         case T4_ERR_ECC_PSTAG:
1041         case T4_ERR_INTERNAL_ERR:
1042                 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA;
1043                 *ecode = 0;
1044                 break;
1045         case T4_ERR_OUT_OF_RQE:
1046                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1047                 *ecode = DDPU_INV_MSN_NOBUF;
1048                 break;
1049         case T4_ERR_PBL_ADDR_BOUND:
1050                 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
1051                 *ecode = DDPT_BASE_BOUNDS;
1052                 break;
1053         case T4_ERR_CRC:
1054                 *layer_type = LAYER_MPA|DDP_LLP;
1055                 *ecode = MPA_CRC_ERR;
1056                 break;
1057         case T4_ERR_MARKER:
1058                 *layer_type = LAYER_MPA|DDP_LLP;
1059                 *ecode = MPA_MARKER_ERR;
1060                 break;
1061         case T4_ERR_PDU_LEN_ERR:
1062                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1063                 *ecode = DDPU_MSG_TOOBIG;
1064                 break;
1065         case T4_ERR_DDP_VERSION:
1066                 if (tagged) {
1067                         *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
1068                         *ecode = DDPT_INV_VERS;
1069                 } else {
1070                         *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1071                         *ecode = DDPU_INV_VERS;
1072                 }
1073                 break;
1074         case T4_ERR_RDMA_VERSION:
1075                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
1076                 *ecode = RDMAP_INV_VERS;
1077                 break;
1078         case T4_ERR_OPCODE:
1079                 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
1080                 *ecode = RDMAP_INV_OPCODE;
1081                 break;
1082         case T4_ERR_DDP_QUEUE_NUM:
1083                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1084                 *ecode = DDPU_INV_QN;
1085                 break;
1086         case T4_ERR_MSN:
1087         case T4_ERR_MSN_GAP:
1088         case T4_ERR_MSN_RANGE:
1089         case T4_ERR_IRD_OVERFLOW:
1090                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1091                 *ecode = DDPU_INV_MSN_RANGE;
1092                 break;
1093         case T4_ERR_TBIT:
1094                 *layer_type = LAYER_DDP|DDP_LOCAL_CATA;
1095                 *ecode = 0;
1096                 break;
1097         case T4_ERR_MO:
1098                 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
1099                 *ecode = DDPU_INV_MO;
1100                 break;
1101         default:
1102                 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
1103                 *ecode = 0;
1104                 break;
1105         }
1106 }
1107
1108 static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe,
1109                            gfp_t gfp)
1110 {
1111         int ret;
1112         struct fw_ri_wr *wqe;
1113         struct terminate_message *term;
1114         struct wrqe *wr;
1115         struct socket *so = qhp->ep->com.so;
1116         struct inpcb *inp = sotoinpcb(so);
1117         struct tcpcb *tp = intotcpcb(inp);
1118         struct toepcb *toep = tp->t_toe;
1119
1120         CTR4(KTR_IW_CXGBE, "%s qhp %p qid 0x%x tid %u", __func__, qhp,
1121             qhp->wq.sq.qid, qhp->ep->hwtid);
1122
1123         wr = alloc_wrqe(sizeof(*wqe), toep->ofld_txq);
1124         if (wr == NULL)
1125                 return;
1126         wqe = wrtod(wr);
1127
1128         memset(wqe, 0, sizeof *wqe);
1129         wqe->op_compl = cpu_to_be32(V_FW_WR_OP(FW_RI_WR));
1130         wqe->flowid_len16 = cpu_to_be32(
1131                 V_FW_WR_FLOWID(qhp->ep->hwtid) |
1132                 V_FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
1133
1134         wqe->u.terminate.type = FW_RI_TYPE_TERMINATE;
1135         wqe->u.terminate.immdlen = cpu_to_be32(sizeof *term);
1136         term = (struct terminate_message *)wqe->u.terminate.termmsg;
1137         if (qhp->attr.layer_etype == (LAYER_MPA|DDP_LLP)) {
1138                 term->layer_etype = qhp->attr.layer_etype;
1139                 term->ecode = qhp->attr.ecode;
1140         } else
1141                 build_term_codes(err_cqe, &term->layer_etype, &term->ecode);
1142         ret = creds(toep, inp, sizeof(*wqe));
1143         if (ret) {
1144                 free_wrqe(wr);
1145                 return;
1146         }
1147         t4_wrq_tx(qhp->rhp->rdev.adap, wr);
1148 }
1149
1150 /* Assumes qhp lock is held. */
1151 static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp,
1152                        struct c4iw_cq *schp)
1153 {
1154         int count;
1155         int rq_flushed, sq_flushed;
1156         unsigned long flag;
1157
1158         CTR4(KTR_IW_CXGBE, "%s qhp %p rchp %p schp %p", __func__, qhp, rchp,
1159             schp);
1160
1161         /* locking hierarchy: cq lock first, then qp lock. */
1162         spin_lock_irqsave(&rchp->lock, flag);
1163         spin_lock(&qhp->lock);
1164
1165         if (qhp->wq.flushed) {
1166                 spin_unlock(&qhp->lock);
1167                 spin_unlock_irqrestore(&rchp->lock, flag);
1168                 return;
1169         }
1170         qhp->wq.flushed = 1;
1171
1172         c4iw_flush_hw_cq(rchp);
1173         c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count);
1174         rq_flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count);
1175         spin_unlock(&qhp->lock);
1176         spin_unlock_irqrestore(&rchp->lock, flag);
1177
1178         /* locking hierarchy: cq lock first, then qp lock. */
1179         spin_lock_irqsave(&schp->lock, flag);
1180         spin_lock(&qhp->lock);
1181         if (schp != rchp)
1182                 c4iw_flush_hw_cq(schp);
1183         sq_flushed = c4iw_flush_sq(qhp);
1184         spin_unlock(&qhp->lock);
1185         spin_unlock_irqrestore(&schp->lock, flag);
1186
1187         if (schp == rchp) {
1188                 if (t4_clear_cq_armed(&rchp->cq) &&
1189                     (rq_flushed || sq_flushed)) {
1190                         spin_lock_irqsave(&rchp->comp_handler_lock, flag);
1191                         (*rchp->ibcq.comp_handler)(&rchp->ibcq,
1192                                                    rchp->ibcq.cq_context);
1193                         spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
1194                 }
1195         } else {
1196                 if (t4_clear_cq_armed(&rchp->cq) && rq_flushed) {
1197                         spin_lock_irqsave(&rchp->comp_handler_lock, flag);
1198                         (*rchp->ibcq.comp_handler)(&rchp->ibcq,
1199                                                    rchp->ibcq.cq_context);
1200                         spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
1201                 }
1202                 if (t4_clear_cq_armed(&schp->cq) && sq_flushed) {
1203                         spin_lock_irqsave(&schp->comp_handler_lock, flag);
1204                         (*schp->ibcq.comp_handler)(&schp->ibcq,
1205                                                    schp->ibcq.cq_context);
1206                         spin_unlock_irqrestore(&schp->comp_handler_lock, flag);
1207                 }
1208         }
1209 }
1210
1211 static void flush_qp(struct c4iw_qp *qhp)
1212 {
1213         struct c4iw_cq *rchp, *schp;
1214         unsigned long flag;
1215
1216         rchp = to_c4iw_cq(qhp->ibqp.recv_cq);
1217         schp = to_c4iw_cq(qhp->ibqp.send_cq);
1218
1219         t4_set_wq_in_error(&qhp->wq);
1220         if (qhp->ibqp.uobject) {
1221                 t4_set_cq_in_error(&rchp->cq);
1222                 spin_lock_irqsave(&rchp->comp_handler_lock, flag);
1223                 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
1224                 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
1225                 if (schp != rchp) {
1226                         t4_set_cq_in_error(&schp->cq);
1227                         spin_lock_irqsave(&schp->comp_handler_lock, flag);
1228                         (*schp->ibcq.comp_handler)(&schp->ibcq,
1229                                         schp->ibcq.cq_context);
1230                         spin_unlock_irqrestore(&schp->comp_handler_lock, flag);
1231                 }
1232                 return;
1233         }
1234         __flush_qp(qhp, rchp, schp);
1235 }
1236
1237 static int
1238 rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp, struct c4iw_ep *ep)
1239 {
1240         struct c4iw_rdev *rdev = &rhp->rdev;
1241         struct adapter *sc = rdev->adap;
1242         struct fw_ri_wr *wqe;
1243         int ret;
1244         struct wrqe *wr;
1245         struct socket *so = ep->com.so;
1246         struct inpcb *inp = sotoinpcb(so);
1247         struct tcpcb *tp = intotcpcb(inp);
1248         struct toepcb *toep = tp->t_toe;
1249
1250         KASSERT(rhp == qhp->rhp && ep == qhp->ep, ("%s: EDOOFUS", __func__));
1251
1252         CTR5(KTR_IW_CXGBE, "%s qhp %p qid 0x%x ep %p tid %u", __func__, qhp,
1253             qhp->wq.sq.qid, ep, ep->hwtid);
1254
1255         wr = alloc_wrqe(sizeof(*wqe), toep->ofld_txq);
1256         if (wr == NULL)
1257                 return (0);
1258         wqe = wrtod(wr);
1259
1260         memset(wqe, 0, sizeof *wqe);
1261
1262         wqe->op_compl = cpu_to_be32(V_FW_WR_OP(FW_RI_WR) | F_FW_WR_COMPL);
1263         wqe->flowid_len16 = cpu_to_be32(V_FW_WR_FLOWID(ep->hwtid) |
1264             V_FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
1265         wqe->cookie = (unsigned long) &ep->com.wr_wait;
1266         wqe->u.fini.type = FW_RI_TYPE_FINI;
1267
1268         c4iw_init_wr_wait(&ep->com.wr_wait);
1269
1270         ret = creds(toep, inp, sizeof(*wqe));
1271         if (ret) {
1272                 free_wrqe(wr);
1273                 return ret;
1274         }
1275         t4_wrq_tx(sc, wr);
1276
1277         ret = c4iw_wait_for_reply(rdev, &ep->com.wr_wait, ep->hwtid,
1278                         qhp->wq.sq.qid, ep->com.so, __func__);
1279         return ret;
1280 }
1281
1282 static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init)
1283 {
1284         CTR2(KTR_IW_CXGBE, "%s p2p_type = %d", __func__, p2p_type);
1285         memset(&init->u, 0, sizeof init->u);
1286         switch (p2p_type) {
1287         case FW_RI_INIT_P2PTYPE_RDMA_WRITE:
1288                 init->u.write.opcode = FW_RI_RDMA_WRITE_WR;
1289                 init->u.write.stag_sink = cpu_to_be32(1);
1290                 init->u.write.to_sink = cpu_to_be64(1);
1291                 init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD;
1292                 init->u.write.len16 = DIV_ROUND_UP(sizeof init->u.write +
1293                                                    sizeof(struct fw_ri_immd),
1294                                                    16);
1295                 break;
1296         case FW_RI_INIT_P2PTYPE_READ_REQ:
1297                 init->u.write.opcode = FW_RI_RDMA_READ_WR;
1298                 init->u.read.stag_src = cpu_to_be32(1);
1299                 init->u.read.to_src_lo = cpu_to_be32(1);
1300                 init->u.read.stag_sink = cpu_to_be32(1);
1301                 init->u.read.to_sink_lo = cpu_to_be32(1);
1302                 init->u.read.len16 = DIV_ROUND_UP(sizeof init->u.read, 16);
1303                 break;
1304         }
1305 }
1306
1307 static int
1308 creds(struct toepcb *toep, struct inpcb *inp, size_t wrsize)
1309 {
1310         struct ofld_tx_sdesc *txsd;
1311
1312         CTR3(KTR_IW_CXGBE, "%s:creB  %p %u", __func__, toep , wrsize);
1313         INP_WLOCK(inp);
1314         if ((inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) != 0) {
1315                 INP_WUNLOCK(inp);
1316                 return (EINVAL);
1317         }
1318         txsd = &toep->txsd[toep->txsd_pidx];
1319         txsd->tx_credits = howmany(wrsize, 16);
1320         txsd->plen = 0;
1321         KASSERT(toep->tx_credits >= txsd->tx_credits && toep->txsd_avail > 0,
1322                         ("%s: not enough credits (%d)", __func__, toep->tx_credits));
1323         toep->tx_credits -= txsd->tx_credits;
1324         if (__predict_false(++toep->txsd_pidx == toep->txsd_total))
1325                 toep->txsd_pidx = 0;
1326         toep->txsd_avail--;
1327         INP_WUNLOCK(inp);
1328         CTR5(KTR_IW_CXGBE, "%s:creE  %p %u %u %u", __func__, toep ,
1329             txsd->tx_credits, toep->tx_credits, toep->txsd_pidx);
1330         return (0);
1331 }
1332
1333 static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp)
1334 {
1335         struct fw_ri_wr *wqe;
1336         int ret;
1337         struct wrqe *wr;
1338         struct c4iw_ep *ep = qhp->ep;
1339         struct c4iw_rdev *rdev = &qhp->rhp->rdev;
1340         struct adapter *sc = rdev->adap;
1341         struct socket *so = ep->com.so;
1342         struct inpcb *inp = sotoinpcb(so);
1343         struct tcpcb *tp = intotcpcb(inp);
1344         struct toepcb *toep = tp->t_toe;
1345
1346         CTR5(KTR_IW_CXGBE, "%s qhp %p qid 0x%x ep %p tid %u", __func__, qhp,
1347             qhp->wq.sq.qid, ep, ep->hwtid);
1348
1349         wr = alloc_wrqe(sizeof(*wqe), toep->ofld_txq);
1350         if (wr == NULL)
1351                 return (0);
1352         wqe = wrtod(wr);
1353         ret = alloc_ird(rhp, qhp->attr.max_ird);
1354         if (ret) {
1355                 qhp->attr.max_ird = 0;
1356                 free_wrqe(wr);
1357                 return ret;
1358         }
1359
1360         memset(wqe, 0, sizeof *wqe);
1361
1362         wqe->op_compl = cpu_to_be32(
1363                 V_FW_WR_OP(FW_RI_WR) |
1364                 F_FW_WR_COMPL);
1365         wqe->flowid_len16 = cpu_to_be32(V_FW_WR_FLOWID(ep->hwtid) |
1366             V_FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
1367
1368         wqe->cookie = (unsigned long) &ep->com.wr_wait;
1369
1370         wqe->u.init.type = FW_RI_TYPE_INIT;
1371         wqe->u.init.mpareqbit_p2ptype =
1372                 V_FW_RI_WR_MPAREQBIT(qhp->attr.mpa_attr.initiator) |
1373                 V_FW_RI_WR_P2PTYPE(qhp->attr.mpa_attr.p2p_type);
1374         wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE;
1375         if (qhp->attr.mpa_attr.recv_marker_enabled)
1376                 wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE;
1377         if (qhp->attr.mpa_attr.xmit_marker_enabled)
1378                 wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE;
1379         if (qhp->attr.mpa_attr.crc_enabled)
1380                 wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE;
1381
1382         wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE |
1383                             FW_RI_QP_RDMA_WRITE_ENABLE |
1384                             FW_RI_QP_BIND_ENABLE;
1385         if (!qhp->ibqp.uobject)
1386                 wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE |
1387                                      FW_RI_QP_STAG0_ENABLE;
1388         wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq));
1389         wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd);
1390         wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid);
1391         wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid);
1392         wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid);
1393         wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq);
1394         wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq);
1395         wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord);
1396         wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird);
1397         wqe->u.init.iss = cpu_to_be32(ep->snd_seq);
1398         wqe->u.init.irs = cpu_to_be32(ep->rcv_seq);
1399         wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size);
1400         wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr -
1401             sc->vres.rq.start);
1402         if (qhp->attr.mpa_attr.initiator)
1403                 build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init);
1404
1405         c4iw_init_wr_wait(&ep->com.wr_wait);
1406
1407         ret = creds(toep, inp, sizeof(*wqe));
1408         if (ret) {
1409                 free_wrqe(wr);
1410                 free_ird(rhp, qhp->attr.max_ird);
1411                 return ret;
1412         }
1413         t4_wrq_tx(sc, wr);
1414
1415         ret = c4iw_wait_for_reply(rdev, &ep->com.wr_wait, ep->hwtid,
1416                         qhp->wq.sq.qid, ep->com.so, __func__);
1417
1418         toep->ulp_mode = ULP_MODE_RDMA;
1419         free_ird(rhp, qhp->attr.max_ird);
1420
1421         return ret;
1422 }
1423
1424 int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
1425                    enum c4iw_qp_attr_mask mask,
1426                    struct c4iw_qp_attributes *attrs,
1427                    int internal)
1428 {
1429         int ret = 0;
1430         struct c4iw_qp_attributes newattr = qhp->attr;
1431         int disconnect = 0;
1432         int terminate = 0;
1433         int abort = 0;
1434         int free = 0;
1435         struct c4iw_ep *ep = NULL;
1436
1437         CTR5(KTR_IW_CXGBE, "%s qhp %p sqid 0x%x rqid 0x%x ep %p", __func__, qhp,
1438             qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep);
1439         CTR3(KTR_IW_CXGBE, "%s state %d -> %d", __func__, qhp->attr.state,
1440             (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1);
1441
1442         mutex_lock(&qhp->mutex);
1443
1444         /* Process attr changes if in IDLE */
1445         if (mask & C4IW_QP_ATTR_VALID_MODIFY) {
1446                 if (qhp->attr.state != C4IW_QP_STATE_IDLE) {
1447                         ret = -EIO;
1448                         goto out;
1449                 }
1450                 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ)
1451                         newattr.enable_rdma_read = attrs->enable_rdma_read;
1452                 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE)
1453                         newattr.enable_rdma_write = attrs->enable_rdma_write;
1454                 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND)
1455                         newattr.enable_bind = attrs->enable_bind;
1456                 if (mask & C4IW_QP_ATTR_MAX_ORD) {
1457                         if (attrs->max_ord > c4iw_max_read_depth) {
1458                                 ret = -EINVAL;
1459                                 goto out;
1460                         }
1461                         newattr.max_ord = attrs->max_ord;
1462                 }
1463                 if (mask & C4IW_QP_ATTR_MAX_IRD) {
1464                         if (attrs->max_ird > cur_max_read_depth(rhp)) {
1465                                 ret = -EINVAL;
1466                                 goto out;
1467                         }
1468                         newattr.max_ird = attrs->max_ird;
1469                 }
1470                 qhp->attr = newattr;
1471         }
1472
1473         if (!(mask & C4IW_QP_ATTR_NEXT_STATE))
1474                 goto out;
1475         if (qhp->attr.state == attrs->next_state)
1476                 goto out;
1477
1478         /* Return EINPROGRESS if QP is already in transition state.
1479          * Eg: CLOSING->IDLE transition or *->ERROR transition.
1480          * This can happen while connection is switching(due to rdma_fini)
1481          * from iWARP/RDDP to TOE mode and any inflight RDMA RX data will
1482          * reach TOE driver -> TCP stack -> iWARP driver. In this way
1483          * iWARP driver keep receiving inflight RDMA RX data until socket
1484          * is closed or aborted. And if iWARP CM is in FPDU sate, then
1485          * it tries to put QP in TERM state and disconnects endpoint.
1486          * But as QP is already in transition state, this event is ignored.
1487          */
1488         if ((qhp->attr.state >= C4IW_QP_STATE_ERROR) &&
1489                 (attrs->next_state == C4IW_QP_STATE_TERMINATE)) {
1490                 ret = -EINPROGRESS;
1491                 goto out;
1492         }
1493
1494         switch (qhp->attr.state) {
1495         case C4IW_QP_STATE_IDLE:
1496                 switch (attrs->next_state) {
1497                 case C4IW_QP_STATE_RTS:
1498                         if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) {
1499                                 ret = -EINVAL;
1500                                 goto out;
1501                         }
1502                         if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) {
1503                                 ret = -EINVAL;
1504                                 goto out;
1505                         }
1506                         qhp->attr.mpa_attr = attrs->mpa_attr;
1507                         qhp->attr.llp_stream_handle = attrs->llp_stream_handle;
1508                         qhp->ep = qhp->attr.llp_stream_handle;
1509                         set_state(qhp, C4IW_QP_STATE_RTS);
1510
1511                         /*
1512                          * Ref the endpoint here and deref when we
1513                          * disassociate the endpoint from the QP.  This
1514                          * happens in CLOSING->IDLE transition or *->ERROR
1515                          * transition.
1516                          */
1517                         c4iw_get_ep(&qhp->ep->com);
1518                         ret = rdma_init(rhp, qhp);
1519                         if (ret)
1520                                 goto err;
1521                         break;
1522                 case C4IW_QP_STATE_ERROR:
1523                         set_state(qhp, C4IW_QP_STATE_ERROR);
1524                         flush_qp(qhp);
1525                         break;
1526                 default:
1527                         ret = -EINVAL;
1528                         goto out;
1529                 }
1530                 break;
1531         case C4IW_QP_STATE_RTS:
1532                 switch (attrs->next_state) {
1533                 case C4IW_QP_STATE_CLOSING:
1534                         BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2);
1535                         t4_set_wq_in_error(&qhp->wq);
1536                         set_state(qhp, C4IW_QP_STATE_CLOSING);
1537                         ep = qhp->ep;
1538                         if (!internal) {
1539                                 abort = 0;
1540                                 disconnect = 1;
1541                                 c4iw_get_ep(&qhp->ep->com);
1542                         }
1543                         ret = rdma_fini(rhp, qhp, ep);
1544                         if (ret)
1545                                 goto err;
1546                         break;
1547                 case C4IW_QP_STATE_TERMINATE:
1548                         t4_set_wq_in_error(&qhp->wq);
1549                         set_state(qhp, C4IW_QP_STATE_TERMINATE);
1550                         qhp->attr.layer_etype = attrs->layer_etype;
1551                         qhp->attr.ecode = attrs->ecode;
1552                         ep = qhp->ep;
1553                         if (!internal) {
1554                                 c4iw_get_ep(&qhp->ep->com);
1555                                 terminate = 1;
1556                                 disconnect = 1;
1557                         } else {
1558                                 terminate = qhp->attr.send_term;
1559                                 ret = rdma_fini(rhp, qhp, ep);
1560                                 if (ret)
1561                                         goto err;
1562                         }
1563                         break;
1564                 case C4IW_QP_STATE_ERROR:
1565                         t4_set_wq_in_error(&qhp->wq);
1566                         set_state(qhp, C4IW_QP_STATE_ERROR);
1567                         if (!internal) {
1568                                 abort = 1;
1569                                 disconnect = 1;
1570                                 ep = qhp->ep;
1571                                 c4iw_get_ep(&qhp->ep->com);
1572                         }
1573                         goto err;
1574                         break;
1575                 default:
1576                         ret = -EINVAL;
1577                         goto out;
1578                 }
1579                 break;
1580         case C4IW_QP_STATE_CLOSING:
1581
1582                 /*
1583                  * Allow kernel users to move to ERROR for qp draining.
1584                  */
1585                 if (!internal && (qhp->ibqp.uobject || attrs->next_state !=
1586                                   C4IW_QP_STATE_ERROR)) {
1587                         ret = -EINVAL;
1588                         goto out;
1589                 }
1590                 switch (attrs->next_state) {
1591                 case C4IW_QP_STATE_IDLE:
1592                         flush_qp(qhp);
1593                         set_state(qhp, C4IW_QP_STATE_IDLE);
1594                         qhp->attr.llp_stream_handle = NULL;
1595                         c4iw_put_ep(&qhp->ep->com);
1596                         qhp->ep = NULL;
1597                         wake_up(&qhp->wait);
1598                         break;
1599                 case C4IW_QP_STATE_ERROR:
1600                         goto err;
1601                 default:
1602                         ret = -EINVAL;
1603                         goto err;
1604                 }
1605                 break;
1606         case C4IW_QP_STATE_ERROR:
1607                 if (attrs->next_state != C4IW_QP_STATE_IDLE) {
1608                         ret = -EINVAL;
1609                         goto out;
1610                 }
1611                 if (!t4_sq_empty(&qhp->wq) || !t4_rq_empty(&qhp->wq)) {
1612                         ret = -EINVAL;
1613                         goto out;
1614                 }
1615                 set_state(qhp, C4IW_QP_STATE_IDLE);
1616                 break;
1617         case C4IW_QP_STATE_TERMINATE:
1618                 if (!internal) {
1619                         ret = -EINVAL;
1620                         goto out;
1621                 }
1622                 goto err;
1623                 break;
1624         default:
1625                 printf("%s in a bad state %d\n",
1626                        __func__, qhp->attr.state);
1627                 ret = -EINVAL;
1628                 goto err;
1629                 break;
1630         }
1631         goto out;
1632 err:
1633         CTR3(KTR_IW_CXGBE, "%s disassociating ep %p qpid 0x%x", __func__,
1634             qhp->ep, qhp->wq.sq.qid);
1635
1636         /* disassociate the LLP connection */
1637         qhp->attr.llp_stream_handle = NULL;
1638         if (!ep)
1639                 ep = qhp->ep;
1640         qhp->ep = NULL;
1641         set_state(qhp, C4IW_QP_STATE_ERROR);
1642         free = 1;
1643         abort = 1;
1644         BUG_ON(!ep);
1645         flush_qp(qhp);
1646         wake_up(&qhp->wait);
1647 out:
1648         mutex_unlock(&qhp->mutex);
1649
1650         if (terminate)
1651                 post_terminate(qhp, NULL, internal ? GFP_ATOMIC : GFP_KERNEL);
1652
1653         /*
1654          * If disconnect is 1, then we need to initiate a disconnect
1655          * on the EP.  This can be a normal close (RTS->CLOSING) or
1656          * an abnormal close (RTS/CLOSING->ERROR).
1657          */
1658         if (disconnect) {
1659                 __c4iw_ep_disconnect(ep, abort, internal ? GFP_ATOMIC :
1660                                                          GFP_KERNEL);
1661                 c4iw_put_ep(&ep->com);
1662         }
1663
1664         /*
1665          * If free is 1, then we've disassociated the EP from the QP
1666          * and we need to dereference the EP.
1667          */
1668         if (free)
1669                 c4iw_put_ep(&ep->com);
1670         CTR2(KTR_IW_CXGBE, "%s exit state %d", __func__, qhp->attr.state);
1671         return ret;
1672 }
1673
1674 int c4iw_destroy_qp(struct ib_qp *ib_qp)
1675 {
1676         struct c4iw_dev *rhp;
1677         struct c4iw_qp *qhp;
1678         struct c4iw_qp_attributes attrs;
1679
1680         CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, ib_qp);
1681         qhp = to_c4iw_qp(ib_qp);
1682         rhp = qhp->rhp;
1683
1684         attrs.next_state = C4IW_QP_STATE_ERROR;
1685         if (qhp->attr.state == C4IW_QP_STATE_TERMINATE)
1686                 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1687         else
1688                 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1689         wait_event(qhp->wait, !qhp->ep);
1690
1691         remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid);
1692
1693         free_ird(rhp, qhp->attr.max_ird);
1694         c4iw_qp_rem_ref(ib_qp);
1695
1696         CTR3(KTR_IW_CXGBE, "%s ib_qp %p qpid 0x%0x", __func__, ib_qp,
1697             qhp->wq.sq.qid);
1698         return 0;
1699 }
1700
1701 struct ib_qp *
1702 c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
1703     struct ib_udata *udata)
1704 {
1705         struct c4iw_dev *rhp;
1706         struct c4iw_qp *qhp;
1707         struct c4iw_pd *php;
1708         struct c4iw_cq *schp;
1709         struct c4iw_cq *rchp;
1710         struct c4iw_create_qp_resp uresp;
1711         unsigned int sqsize, rqsize;
1712         struct c4iw_ucontext *ucontext;
1713         int ret;
1714         struct c4iw_mm_entry *sq_key_mm = NULL, *rq_key_mm = NULL;
1715         struct c4iw_mm_entry *sq_db_key_mm = NULL, *rq_db_key_mm = NULL;
1716
1717         CTR2(KTR_IW_CXGBE, "%s ib_pd %p", __func__, pd);
1718
1719         if (attrs->qp_type != IB_QPT_RC)
1720                 return ERR_PTR(-EINVAL);
1721
1722         php = to_c4iw_pd(pd);
1723         rhp = php->rhp;
1724         schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid);
1725         rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid);
1726         if (!schp || !rchp)
1727                 return ERR_PTR(-EINVAL);
1728
1729         if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE)
1730                 return ERR_PTR(-EINVAL);
1731
1732         if (attrs->cap.max_recv_wr > rhp->rdev.hw_queue.t4_max_rq_size)
1733                 return ERR_PTR(-E2BIG);
1734         rqsize = attrs->cap.max_recv_wr + 1;
1735         if (rqsize < 8)
1736                 rqsize = 8;
1737
1738         if (attrs->cap.max_send_wr > rhp->rdev.hw_queue.t4_max_sq_size)
1739                 return ERR_PTR(-E2BIG);
1740         sqsize = attrs->cap.max_send_wr + 1;
1741         if (sqsize < 8)
1742                 sqsize = 8;
1743
1744         ucontext = pd->uobject ? to_c4iw_ucontext(pd->uobject->context) : NULL;
1745
1746         qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
1747         if (!qhp)
1748                 return ERR_PTR(-ENOMEM);
1749         qhp->wq.sq.size = sqsize;
1750         qhp->wq.sq.memsize =
1751                 (sqsize + rhp->rdev.hw_queue.t4_eq_status_entries) *
1752                 sizeof(*qhp->wq.sq.queue) + 16 * sizeof(__be64);
1753         qhp->wq.sq.flush_cidx = -1;
1754         qhp->wq.rq.size = rqsize;
1755         qhp->wq.rq.memsize =
1756                 (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) *
1757                 sizeof(*qhp->wq.rq.queue);
1758
1759         if (ucontext) {
1760                 qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE);
1761                 qhp->wq.rq.memsize = roundup(qhp->wq.rq.memsize, PAGE_SIZE);
1762         }
1763
1764         CTR5(KTR_IW_CXGBE, "%s sqsize %u sqmemsize %zu rqsize %u rqmemsize %zu",
1765             __func__, sqsize, qhp->wq.sq.memsize, rqsize, qhp->wq.rq.memsize);
1766
1767         ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq,
1768                         ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1769         if (ret)
1770                 goto err1;
1771
1772         attrs->cap.max_recv_wr = rqsize - 1;
1773         attrs->cap.max_send_wr = sqsize - 1;
1774         attrs->cap.max_inline_data = T4_MAX_SEND_INLINE;
1775
1776         qhp->rhp = rhp;
1777         qhp->attr.pd = php->pdid;
1778         qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid;
1779         qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid;
1780         qhp->attr.sq_num_entries = attrs->cap.max_send_wr;
1781         qhp->attr.rq_num_entries = attrs->cap.max_recv_wr;
1782         qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
1783         qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
1784         qhp->attr.rq_max_sges = attrs->cap.max_recv_sge;
1785         qhp->attr.state = C4IW_QP_STATE_IDLE;
1786         qhp->attr.next_state = C4IW_QP_STATE_IDLE;
1787         qhp->attr.enable_rdma_read = 1;
1788         qhp->attr.enable_rdma_write = 1;
1789         qhp->attr.enable_bind = 1;
1790         qhp->attr.max_ord = 0;
1791         qhp->attr.max_ird = 0;
1792         qhp->sq_sig_all = attrs->sq_sig_type == IB_SIGNAL_ALL_WR;
1793         spin_lock_init(&qhp->lock);
1794         mutex_init(&qhp->mutex);
1795         init_waitqueue_head(&qhp->wait);
1796         kref_init(&qhp->kref);
1797         INIT_WORK(&qhp->free_work, free_qp_work);
1798
1799         ret = insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid);
1800         if (ret)
1801                 goto err2;
1802
1803         if (udata) {
1804                 sq_key_mm = kmalloc(sizeof(*sq_key_mm), GFP_KERNEL);
1805                 if (!sq_key_mm) {
1806                         ret = -ENOMEM;
1807                         goto err3;
1808                 }
1809                 rq_key_mm = kmalloc(sizeof(*rq_key_mm), GFP_KERNEL);
1810                 if (!rq_key_mm) {
1811                         ret = -ENOMEM;
1812                         goto err4;
1813                 }
1814                 sq_db_key_mm = kmalloc(sizeof(*sq_db_key_mm), GFP_KERNEL);
1815                 if (!sq_db_key_mm) {
1816                         ret = -ENOMEM;
1817                         goto err5;
1818                 }
1819                 rq_db_key_mm = kmalloc(sizeof(*rq_db_key_mm), GFP_KERNEL);
1820                 if (!rq_db_key_mm) {
1821                         ret = -ENOMEM;
1822                         goto err6;
1823                 }
1824                 uresp.flags = 0;
1825                 uresp.qid_mask = rhp->rdev.qpmask;
1826                 uresp.sqid = qhp->wq.sq.qid;
1827                 uresp.sq_size = qhp->wq.sq.size;
1828                 uresp.sq_memsize = qhp->wq.sq.memsize;
1829                 uresp.rqid = qhp->wq.rq.qid;
1830                 uresp.rq_size = qhp->wq.rq.size;
1831                 uresp.rq_memsize = qhp->wq.rq.memsize;
1832                 spin_lock(&ucontext->mmap_lock);
1833                 uresp.ma_sync_key =  0;
1834                 uresp.sq_key = ucontext->key;
1835                 ucontext->key += PAGE_SIZE;
1836                 uresp.rq_key = ucontext->key;
1837                 ucontext->key += PAGE_SIZE;
1838                 uresp.sq_db_gts_key = ucontext->key;
1839                 ucontext->key += PAGE_SIZE;
1840                 uresp.rq_db_gts_key = ucontext->key;
1841                 ucontext->key += PAGE_SIZE;
1842                 spin_unlock(&ucontext->mmap_lock);
1843                 ret = ib_copy_to_udata(udata, &uresp, sizeof uresp);
1844                 if (ret)
1845                         goto err7;
1846                 sq_key_mm->key = uresp.sq_key;
1847                 sq_key_mm->addr = qhp->wq.sq.phys_addr;
1848                 sq_key_mm->len = PAGE_ALIGN(qhp->wq.sq.memsize);
1849                 CTR4(KTR_IW_CXGBE, "%s sq_key_mm %x, %x, %d", __func__,
1850                                 sq_key_mm->key, sq_key_mm->addr,
1851                                 sq_key_mm->len);
1852                 insert_mmap(ucontext, sq_key_mm);
1853                 rq_key_mm->key = uresp.rq_key;
1854                 rq_key_mm->addr = qhp->wq.rq.phys_addr;
1855                 rq_key_mm->len = PAGE_ALIGN(qhp->wq.rq.memsize);
1856                 CTR4(KTR_IW_CXGBE, "%s rq_key_mm %x, %x, %d", __func__,
1857                                 rq_key_mm->key, rq_key_mm->addr,
1858                                 rq_key_mm->len);
1859                 insert_mmap(ucontext, rq_key_mm);
1860                 sq_db_key_mm->key = uresp.sq_db_gts_key;
1861                 sq_db_key_mm->addr = (u64)qhp->wq.sq.bar2_pa;
1862                 sq_db_key_mm->len = PAGE_SIZE;
1863                 CTR4(KTR_IW_CXGBE, "%s sq_db_key_mm %x, %x, %d", __func__,
1864                                 sq_db_key_mm->key, sq_db_key_mm->addr,
1865                                 sq_db_key_mm->len);
1866                 insert_mmap(ucontext, sq_db_key_mm);
1867                 rq_db_key_mm->key = uresp.rq_db_gts_key;
1868                 rq_db_key_mm->addr = (u64)qhp->wq.rq.bar2_pa;
1869                 rq_db_key_mm->len = PAGE_SIZE;
1870                 CTR4(KTR_IW_CXGBE, "%s rq_db_key_mm %x, %x, %d", __func__,
1871                                 rq_db_key_mm->key, rq_db_key_mm->addr,
1872                                 rq_db_key_mm->len);
1873                 insert_mmap(ucontext, rq_db_key_mm);
1874
1875                 c4iw_get_ucontext(ucontext);
1876                 qhp->ucontext = ucontext;
1877         }
1878         qhp->ibqp.qp_num = qhp->wq.sq.qid;
1879         init_timer(&(qhp->timer));
1880
1881         CTR5(KTR_IW_CXGBE, "%s sq id %u size %u memsize %zu num_entries %u",
1882                  __func__, qhp->wq.sq.qid,
1883                  qhp->wq.sq.size, qhp->wq.sq.memsize, attrs->cap.max_send_wr);
1884         CTR5(KTR_IW_CXGBE, "%s rq id %u size %u memsize %zu num_entries %u",
1885                  __func__, qhp->wq.rq.qid,
1886                  qhp->wq.rq.size, qhp->wq.rq.memsize, attrs->cap.max_recv_wr);
1887         return &qhp->ibqp;
1888 err7:
1889         kfree(rq_db_key_mm);
1890 err6:
1891         kfree(sq_db_key_mm);
1892 err5:
1893         kfree(rq_key_mm);
1894 err4:
1895         kfree(sq_key_mm);
1896 err3:
1897         remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid);
1898 err2:
1899         destroy_qp(&rhp->rdev, &qhp->wq,
1900                    ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1901 err1:
1902         kfree(qhp);
1903         return ERR_PTR(ret);
1904 }
1905
1906 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1907                       int attr_mask, struct ib_udata *udata)
1908 {
1909         struct c4iw_dev *rhp;
1910         struct c4iw_qp *qhp;
1911         enum c4iw_qp_attr_mask mask = 0;
1912         struct c4iw_qp_attributes attrs;
1913
1914         CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, ibqp);
1915
1916         /* iwarp does not support the RTR state */
1917         if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR))
1918                 attr_mask &= ~IB_QP_STATE;
1919
1920         /* Make sure we still have something left to do */
1921         if (!attr_mask)
1922                 return 0;
1923
1924         memset(&attrs, 0, sizeof attrs);
1925         qhp = to_c4iw_qp(ibqp);
1926         rhp = qhp->rhp;
1927
1928         attrs.next_state = c4iw_convert_state(attr->qp_state);
1929         attrs.enable_rdma_read = (attr->qp_access_flags &
1930                                IB_ACCESS_REMOTE_READ) ?  1 : 0;
1931         attrs.enable_rdma_write = (attr->qp_access_flags &
1932                                 IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
1933         attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0;
1934
1935
1936         mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0;
1937         mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ?
1938                         (C4IW_QP_ATTR_ENABLE_RDMA_READ |
1939                          C4IW_QP_ATTR_ENABLE_RDMA_WRITE |
1940                          C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0;
1941
1942         return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0);
1943 }
1944
1945 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn)
1946 {
1947         CTR3(KTR_IW_CXGBE, "%s ib_dev %p qpn 0x%x", __func__, dev, qpn);
1948         return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn);
1949 }
1950
1951 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1952                      int attr_mask, struct ib_qp_init_attr *init_attr)
1953 {
1954         struct c4iw_qp *qhp = to_c4iw_qp(ibqp);
1955
1956         memset(attr, 0, sizeof *attr);
1957         memset(init_attr, 0, sizeof *init_attr);
1958         attr->qp_state = to_ib_qp_state(qhp->attr.state);
1959         init_attr->cap.max_send_wr = qhp->attr.sq_num_entries;
1960         init_attr->cap.max_recv_wr = qhp->attr.rq_num_entries;
1961         init_attr->cap.max_send_sge = qhp->attr.sq_max_sges;
1962         init_attr->cap.max_recv_sge = qhp->attr.sq_max_sges;
1963         init_attr->cap.max_inline_data = T4_MAX_SEND_INLINE;
1964         init_attr->sq_sig_type = qhp->sq_sig_all ? IB_SIGNAL_ALL_WR : 0;
1965         return 0;
1966 }
1967 #endif