sys/dev/cxgbe/iw_cxgbe/provider.c

   1 /*
   2  * Copyright (c) 2009-2013, 2016 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #define LINUXKPI_PARAM_PREFIX iw_cxgbe_
  36
  37 #include "opt_inet.h"
  38
  39 #ifdef TCP_OFFLOAD
  40 #include <asm/pgtable.h>
  41 #include <linux/page.h>
  42 #include <rdma/ib_verbs.h>
  43 #include <rdma/ib_user_verbs.h>
  44
  45 #include "iw_cxgbe.h"
  46 #include "user.h"
  47
  48 static int fastreg_support = 1;
  49 module_param(fastreg_support, int, 0644);
  50 MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default = 1)");
  51
  52 static int c4iw_modify_port(struct ib_device *ibdev,
  53                             u8 port, int port_modify_mask,
  54                             struct ib_port_modify *props)
  55 {
  56         return -ENOSYS;
  57 }
  58
  59 static struct ib_ah *c4iw_ah_create(struct ib_pd *pd,
  60                                     struct ib_ah_attr *ah_attr)
  61 {
  62         return ERR_PTR(-ENOSYS);
  63 }
  64
  65 static int c4iw_ah_destroy(struct ib_ah *ah)
  66 {
  67         return -ENOSYS;
  68 }
  69
  70 static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
  71 {
  72         return -ENOSYS;
  73 }
  74
  75 static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
  76 {
  77         return -ENOSYS;
  78 }
  79
  80 static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags,
  81                             u8 port_num, struct ib_wc *in_wc,
  82                             struct ib_grh *in_grh, struct ib_mad *in_mad,
  83                             struct ib_mad *out_mad)
  84 {
  85         return -ENOSYS;
  86 }
  87
  88 static int c4iw_dealloc_ucontext(struct ib_ucontext *context)
  89 {
  90         struct c4iw_dev *rhp = to_c4iw_dev(context->device);
  91         struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
  92         struct c4iw_mm_entry *mm, *tmp;
  93
  94         CTR2(KTR_IW_CXGBE, "%s context %p", __func__, context);
  95         list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
  96                 kfree(mm);
  97         c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
  98         kfree(ucontext);
  99         return 0;
 100 }
 101
 102 static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev,
 103                                                struct ib_udata *udata)
 104 {
 105         struct c4iw_ucontext *context;
 106         struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
 107
 108         CTR2(KTR_IW_CXGBE, "%s ibdev %p", __func__, ibdev);
 109         context = kzalloc(sizeof(*context), GFP_KERNEL);
 110         if (!context)
 111                 return ERR_PTR(-ENOMEM);
 112         c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
 113         INIT_LIST_HEAD(&context->mmaps);
 114         spin_lock_init(&context->mmap_lock);
 115         return &context->ibucontext;
 116 }
 117
 118 #ifdef DOT5
 119 static inline pgprot_t t4_pgprot_wc(pgprot_t prot)
 120 {
 121     return pgprot_writecombine(prot);
 122 }
 123 #endif
 124
 125 static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 126 {
 127         int len = vma->vm_end - vma->vm_start;
 128         u32 key = vma->vm_pgoff << PAGE_SHIFT;
 129         struct c4iw_rdev *rdev;
 130         int ret = 0;
 131         struct c4iw_mm_entry *mm;
 132         struct c4iw_ucontext *ucontext;
 133         u64 addr, paddr;
 134
 135         u64 va_regs_res = 0, va_udbs_res = 0;
 136         u64 len_regs_res = 0, len_udbs_res = 0;
 137
 138         CTR3(KTR_IW_CXGBE, "%s:1 ctx %p vma %p", __func__, context, vma);
 139
 140         CTR4(KTR_IW_CXGBE, "%s:1a pgoff 0x%lx key 0x%x len %d", __func__,
 141             vma->vm_pgoff, key, len);
 142
 143         if (vma->vm_start & (PAGE_SIZE-1)) {
 144                 CTR3(KTR_IW_CXGBE, "%s:2 unaligned vm_start %u vma %p",
 145                     __func__, vma->vm_start, vma);
 146                 return -EINVAL;
 147         }
 148
 149         rdev = &(to_c4iw_dev(context->device)->rdev);
 150         ucontext = to_c4iw_ucontext(context);
 151
 152         mm = remove_mmap(ucontext, key, len);
 153         if (!mm) {
 154                 CTR4(KTR_IW_CXGBE, "%s:3 ucontext %p key %u len %u", __func__,
 155                     ucontext, key, len);
 156                 return -EINVAL;
 157         }
 158         addr = mm->addr;
 159         kfree(mm);
 160
 161         va_regs_res = (u64)rman_get_virtual(rdev->adap->regs_res);
 162         len_regs_res = (u64)rman_get_size(rdev->adap->regs_res);
 163         va_udbs_res = (u64)rman_get_virtual(rdev->adap->udbs_res);
 164         len_udbs_res = (u64)rman_get_size(rdev->adap->udbs_res);
 165
 166         CTR6(KTR_IW_CXGBE,
 167             "%s:4 addr %p, masync region %p:%p, udb region %p:%p", __func__,
 168             addr, va_regs_res, va_regs_res+len_regs_res, va_udbs_res,
 169             va_udbs_res+len_udbs_res);
 170
 171         if (addr >= va_regs_res && addr < va_regs_res + len_regs_res) {
 172                 CTR4(KTR_IW_CXGBE, "%s:5 MA_SYNC addr %p region %p, reglen %u",
 173                     __func__, addr, va_regs_res, len_regs_res);
 174                 /*
 175                  * MA_SYNC register...
 176                  */
 177                 paddr = vtophys(addr);
 178                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 179                 ret = io_remap_pfn_range(vma, vma->vm_start,
 180                                 paddr >> PAGE_SHIFT,
 181                                 len, vma->vm_page_prot);
 182         } else {
 183
 184                 if (addr >= va_udbs_res && addr < va_udbs_res + len_udbs_res) {
 185                         /*
 186                         * Map user DB or OCQP memory...
 187                         */
 188                         paddr = vtophys(addr);
 189                         CTR4(KTR_IW_CXGBE,
 190                             "%s:6 USER DB-GTS addr %p region %p, reglen %u",
 191                             __func__, addr, va_udbs_res, len_udbs_res);
 192 #ifdef DOT5
 193                         if (!is_t4(rdev->lldi.adapter_type) && map_udb_as_wc)
 194                                 vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
 195                         else
 196 #endif
 197                                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 198                         ret = io_remap_pfn_range(vma, vma->vm_start,
 199                                         paddr >> PAGE_SHIFT,
 200                                         len, vma->vm_page_prot);
 201                 } else {
 202                         /*
 203                          * Map WQ or CQ contig dma memory...
 204                          */
 205                         CTR4(KTR_IW_CXGBE,
 206                             "%s:7 WQ/CQ addr %p vm_start %u vma %p", __func__,
 207                             addr, vma->vm_start, vma);
 208                         ret = io_remap_pfn_range(vma, vma->vm_start,
 209                                 addr >> PAGE_SHIFT,
 210                                 len, vma->vm_page_prot);
 211                 }
 212         }
 213         CTR4(KTR_IW_CXGBE, "%s:8 ctx %p vma %p ret %u", __func__, context, vma,
 214             ret);
 215         return ret;
 216 }
 217
 218 static int
 219 c4iw_deallocate_pd(struct ib_pd *pd)
 220 {
 221         struct c4iw_pd *php = to_c4iw_pd(pd);
 222         struct c4iw_dev *rhp = php->rhp;
 223
 224         CTR3(KTR_IW_CXGBE, "%s: pd %p, pdid 0x%x", __func__, pd, php->pdid);
 225
 226         c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
 227         mutex_lock(&rhp->rdev.stats.lock);
 228         rhp->rdev.stats.pd.cur--;
 229         mutex_unlock(&rhp->rdev.stats.lock);
 230         kfree(php);
 231
 232         return (0);
 233 }
 234
 235 static struct ib_pd *
 236 c4iw_allocate_pd(struct ib_device *ibdev, struct ib_ucontext *context,
 237     struct ib_udata *udata)
 238 {
 239         struct c4iw_pd *php;
 240         u32 pdid;
 241         struct c4iw_dev *rhp;
 242
 243         CTR4(KTR_IW_CXGBE, "%s: ibdev %p, context %p, data %p", __func__, ibdev,
 244             context, udata);
 245         rhp = (struct c4iw_dev *) ibdev;
 246         pdid =  c4iw_get_resource(&rhp->rdev.resource.pdid_table);
 247         if (!pdid)
 248                 return ERR_PTR(-EINVAL);
 249         php = kzalloc(sizeof(*php), GFP_KERNEL);
 250         if (!php) {
 251                 c4iw_put_resource(&rhp->rdev.resource.pdid_table, pdid);
 252                 return ERR_PTR(-ENOMEM);
 253         }
 254         php->pdid = pdid;
 255         php->rhp = rhp;
 256         if (context) {
 257                 if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
 258                         c4iw_deallocate_pd(&php->ibpd);
 259                         return ERR_PTR(-EFAULT);
 260                 }
 261         }
 262         mutex_lock(&rhp->rdev.stats.lock);
 263         rhp->rdev.stats.pd.cur++;
 264         if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
 265                 rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
 266         mutex_unlock(&rhp->rdev.stats.lock);
 267
 268         CTR6(KTR_IW_CXGBE,
 269             "%s: ibdev %p, context %p, data %p, pddid 0x%x, pd %p", __func__,
 270             ibdev, context, udata, pdid, php);
 271         return (&php->ibpd);
 272 }
 273
 274 static int
 275 c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 276 {
 277
 278         CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, pkey %p", __func__,
 279             ibdev, port, index, pkey);
 280
 281         *pkey = 0;
 282         return (0);
 283 }
 284
 285 static int
 286 c4iw_query_gid(struct ib_device *ibdev, u8 port, int index, union ib_gid *gid)
 287 {
 288         struct c4iw_dev *dev;
 289         struct port_info *pi;
 290         struct adapter *sc;
 291
 292         CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, gid %p", __func__,
 293             ibdev, port, index, gid);
 294
 295         memset(&gid->raw[0], 0, sizeof(gid->raw));
 296         dev = to_c4iw_dev(ibdev);
 297         sc = dev->rdev.adap;
 298         if (port == 0 || port > sc->params.nports)
 299                 return (-EINVAL);
 300         pi = sc->port[port - 1];
 301         memcpy(&gid->raw[0], pi->vi[0].hw_addr, ETHER_ADDR_LEN);
 302         return (0);
 303 }
 304
 305 static int
 306 c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
 307 {
 308         struct c4iw_dev *dev = to_c4iw_dev(ibdev);
 309         struct adapter *sc = dev->rdev.adap;
 310         const int spg_ndesc = sc->params.sge.spg_len / EQ_ESIZE;
 311
 312         CTR3(KTR_IW_CXGBE, "%s ibdev %p, props %p", __func__, ibdev, props);
 313
 314         memset(props, 0, sizeof *props);
 315         memcpy(&props->sys_image_guid, sc->port[0]->vi[0].hw_addr,
 316             ETHER_ADDR_LEN);
 317         props->hw_ver = sc->params.chipid;
 318         props->fw_ver = sc->params.fw_vers;
 319         props->device_cap_flags = dev->device_cap_flags;
 320         props->page_size_cap = T4_PAGESIZE_MASK;
 321         props->vendor_id = pci_get_vendor(sc->dev);
 322         props->vendor_part_id = pci_get_device(sc->dev);
 323         props->max_mr_size = T4_MAX_MR_SIZE;
 324         props->max_qp = sc->vres.qp.size / 2;
 325         props->max_qp_wr = T4_MAX_QP_DEPTH(spg_ndesc);
 326         props->max_sge = T4_MAX_RECV_SGE;
 327         props->max_sge_rd = 1;
 328         props->max_res_rd_atom = sc->params.max_ird_adapter;
 329         props->max_qp_rd_atom = min(sc->params.max_ordird_qp,
 330             c4iw_max_read_depth);
 331         props->max_qp_init_rd_atom = props->max_qp_rd_atom;
 332         props->max_cq = sc->vres.qp.size;
 333         props->max_cqe = T4_MAX_CQ_DEPTH;
 334         props->max_mr = c4iw_num_stags(&dev->rdev);
 335         props->max_pd = T4_MAX_NUM_PD;
 336         props->local_ca_ack_delay = 0;
 337         props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;
 338
 339         return (0);
 340 }
 341
 342 /*
 343  * Returns -errno on failure.
 344  */
 345 static int
 346 c4iw_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
 347 {
 348         struct c4iw_dev *dev;
 349         struct adapter *sc;
 350         struct port_info *pi;
 351         struct ifnet *ifp;
 352
 353         CTR4(KTR_IW_CXGBE, "%s ibdev %p, port %d, props %p", __func__, ibdev,
 354             port, props);
 355
 356         dev = to_c4iw_dev(ibdev);
 357         sc = dev->rdev.adap;
 358         if (port > sc->params.nports)
 359                 return (-EINVAL);
 360         pi = sc->port[port - 1];
 361         ifp = pi->vi[0].ifp;
 362
 363         memset(props, 0, sizeof(struct ib_port_attr));
 364         props->max_mtu = IB_MTU_4096;
 365         if (ifp->if_mtu >= 4096)
 366                 props->active_mtu = IB_MTU_4096;
 367         else if (ifp->if_mtu >= 2048)
 368                 props->active_mtu = IB_MTU_2048;
 369         else if (ifp->if_mtu >= 1024)
 370                 props->active_mtu = IB_MTU_1024;
 371         else if (ifp->if_mtu >= 512)
 372                 props->active_mtu = IB_MTU_512;
 373         else
 374                 props->active_mtu = IB_MTU_256;
 375         props->state = pi->link_cfg.link_ok ? IB_PORT_ACTIVE : IB_PORT_DOWN;
 376         props->port_cap_flags =
 377             IB_PORT_CM_SUP |
 378             IB_PORT_SNMP_TUNNEL_SUP |
 379             IB_PORT_REINIT_SUP |
 380             IB_PORT_DEVICE_MGMT_SUP |
 381             IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 382         props->gid_tbl_len = 1;
 383         props->pkey_tbl_len = 1;
 384         props->active_width = 2;
 385         props->active_speed = 2;
 386         props->max_msg_sz = -1;
 387
 388         return 0;
 389 }
 390
 391 static int c4iw_port_immutable(struct ib_device *ibdev, u8 port_num,
 392                                struct ib_port_immutable *immutable)
 393 {
 394         struct ib_port_attr attr;
 395         int err;
 396
 397         immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
 398
 399         err = ib_query_port(ibdev, port_num, &attr);
 400         if (err)
 401                 return err;
 402
 403         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 404         immutable->gid_tbl_len = attr.gid_tbl_len;
 405
 406         return 0;
 407 }
 408
 409 /*
 410  * Returns -errno on error.
 411  */
 412 int
 413 c4iw_register_device(struct c4iw_dev *dev)
 414 {
 415         struct adapter *sc = dev->rdev.adap;
 416         struct ib_device *ibdev = &dev->ibdev;
 417         struct iw_cm_verbs *iwcm;
 418         int ret;
 419
 420         CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev, sc);
 421         BUG_ON(!sc->port[0]);
 422         strlcpy(ibdev->name, device_get_nameunit(sc->dev), sizeof(ibdev->name));
 423         memset(&ibdev->node_guid, 0, sizeof(ibdev->node_guid));
 424         memcpy(&ibdev->node_guid, sc->port[0]->vi[0].hw_addr, ETHER_ADDR_LEN);
 425         ibdev->owner = THIS_MODULE;
 426         dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
 427         if (fastreg_support)
 428                 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
 429         ibdev->local_dma_lkey = 0;
 430         ibdev->uverbs_cmd_mask =
 431             (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
 432             (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
 433             (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
 434             (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
 435             (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
 436             (1ull << IB_USER_VERBS_CMD_REG_MR) |
 437             (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
 438             (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 439             (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
 440             (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
 441             (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
 442             (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
 443             (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
 444             (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
 445             (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
 446             (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
 447             (1ull << IB_USER_VERBS_CMD_POST_SEND) |
 448             (1ull << IB_USER_VERBS_CMD_POST_RECV);
 449         ibdev->node_type = RDMA_NODE_RNIC;
 450         strlcpy(ibdev->node_desc, C4IW_NODE_DESC, sizeof(ibdev->node_desc));
 451         ibdev->phys_port_cnt = sc->params.nports;
 452         ibdev->num_comp_vectors = 1;
 453         ibdev->dma_device = NULL;
 454         ibdev->query_device = c4iw_query_device;
 455         ibdev->query_port = c4iw_query_port;
 456         ibdev->modify_port = c4iw_modify_port;
 457         ibdev->query_pkey = c4iw_query_pkey;
 458         ibdev->query_gid = c4iw_query_gid;
 459         ibdev->alloc_ucontext = c4iw_alloc_ucontext;
 460         ibdev->dealloc_ucontext = c4iw_dealloc_ucontext;
 461         ibdev->mmap = c4iw_mmap;
 462         ibdev->alloc_pd = c4iw_allocate_pd;
 463         ibdev->dealloc_pd = c4iw_deallocate_pd;
 464         ibdev->create_ah = c4iw_ah_create;
 465         ibdev->destroy_ah = c4iw_ah_destroy;
 466         ibdev->create_qp = c4iw_create_qp;
 467         ibdev->modify_qp = c4iw_ib_modify_qp;
 468         ibdev->query_qp = c4iw_ib_query_qp;
 469         ibdev->destroy_qp = c4iw_destroy_qp;
 470         ibdev->create_cq = c4iw_create_cq;
 471         ibdev->destroy_cq = c4iw_destroy_cq;
 472         ibdev->resize_cq = c4iw_resize_cq;
 473         ibdev->poll_cq = c4iw_poll_cq;
 474         ibdev->get_dma_mr = c4iw_get_dma_mr;
 475         ibdev->reg_phys_mr = c4iw_register_phys_mem;
 476         ibdev->rereg_phys_mr = c4iw_reregister_phys_mem;
 477         ibdev->reg_user_mr = c4iw_reg_user_mr;
 478         ibdev->dereg_mr = c4iw_dereg_mr;
 479         ibdev->alloc_mw = c4iw_alloc_mw;
 480         ibdev->bind_mw = c4iw_bind_mw;
 481         ibdev->dealloc_mw = c4iw_dealloc_mw;
 482         ibdev->alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr;
 483         ibdev->alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl;
 484         ibdev->free_fast_reg_page_list = c4iw_free_fastreg_pbl;
 485         ibdev->attach_mcast = c4iw_multicast_attach;
 486         ibdev->detach_mcast = c4iw_multicast_detach;
 487         ibdev->process_mad = c4iw_process_mad;
 488         ibdev->req_notify_cq = c4iw_arm_cq;
 489         ibdev->post_send = c4iw_post_send;
 490         ibdev->post_recv = c4iw_post_receive;
 491         ibdev->uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
 492         ibdev->get_port_immutable = c4iw_port_immutable;
 493
 494         iwcm = kmalloc(sizeof(*iwcm), GFP_KERNEL);
 495         if (iwcm == NULL)
 496                 return (-ENOMEM);
 497
 498         iwcm->connect = c4iw_connect;
 499         iwcm->accept = c4iw_accept_cr;
 500         iwcm->reject = c4iw_reject_cr;
 501         iwcm->create_listen_ep = c4iw_create_listen_ep;
 502         iwcm->destroy_listen_ep = c4iw_destroy_listen_ep;
 503         iwcm->newconn = process_newconn;
 504         iwcm->add_ref = c4iw_qp_add_ref;
 505         iwcm->rem_ref = c4iw_qp_rem_ref;
 506         iwcm->get_qp = c4iw_get_qp;
 507         ibdev->iwcm = iwcm;
 508
 509         ret = ib_register_device(&dev->ibdev, NULL);
 510         if (ret)
 511                 kfree(iwcm);
 512
 513         return (ret);
 514 }
 515
 516 void
 517 c4iw_unregister_device(struct c4iw_dev *dev)
 518 {
 519
 520         CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev,
 521             dev->rdev.adap);
 522         ib_unregister_device(&dev->ibdev);
 523         kfree(dev->ibdev.iwcm);
 524         return;
 525 }
 526 #endif