drivers/infiniband/hw/cxgb4/provider.c

   1 /*
   2  * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32 #include <linux/module.h>
  33 #include <linux/moduleparam.h>
  34 #include <linux/device.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/etherdevice.h>
  37 #include <linux/delay.h>
  38 #include <linux/errno.h>
  39 #include <linux/list.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/ethtool.h>
  42 #include <linux/rtnetlink.h>
  43 #include <linux/inetdevice.h>
  44 #include <linux/io.h>
  45
  46 #include <asm/irq.h>
  47 #include <asm/byteorder.h>
  48
  49 #include <rdma/iw_cm.h>
  50 #include <rdma/ib_verbs.h>
  51 #include <rdma/ib_smi.h>
  52 #include <rdma/ib_umem.h>
  53 #include <rdma/ib_user_verbs.h>
  54
  55 #include "iw_cxgb4.h"
  56
  57 static int fastreg_support = 1;
  58 module_param(fastreg_support, int, 0644);
  59 MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default=1)");
  60
  61 static struct ib_ah *c4iw_ah_create(struct ib_pd *pd,
  62                                     struct ib_ah_attr *ah_attr)
  63 {
  64         return ERR_PTR(-ENOSYS);
  65 }
  66
  67 static int c4iw_ah_destroy(struct ib_ah *ah)
  68 {
  69         return -ENOSYS;
  70 }
  71
  72 static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
  73 {
  74         return -ENOSYS;
  75 }
  76
  77 static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
  78 {
  79         return -ENOSYS;
  80 }
  81
  82 static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags,
  83                             u8 port_num, struct ib_wc *in_wc,
  84                             struct ib_grh *in_grh, struct ib_mad *in_mad,
  85                             struct ib_mad *out_mad)
  86 {
  87         return -ENOSYS;
  88 }
  89
  90 static int c4iw_dealloc_ucontext(struct ib_ucontext *context)
  91 {
  92         struct c4iw_dev *rhp = to_c4iw_dev(context->device);
  93         struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
  94         struct c4iw_mm_entry *mm, *tmp;
  95
  96         PDBG("%s context %p\n", __func__, context);
  97         list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
  98                 kfree(mm);
  99         c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
 100         kfree(ucontext);
 101         return 0;
 102 }
 103
 104 static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev,
 105                                                struct ib_udata *udata)
 106 {
 107         struct c4iw_ucontext *context;
 108         struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
 109
 110         PDBG("%s ibdev %p\n", __func__, ibdev);
 111         context = kzalloc(sizeof(*context), GFP_KERNEL);
 112         if (!context)
 113                 return ERR_PTR(-ENOMEM);
 114         c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
 115         INIT_LIST_HEAD(&context->mmaps);
 116         spin_lock_init(&context->mmap_lock);
 117         return &context->ibucontext;
 118 }
 119
 120 static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 121 {
 122         int len = vma->vm_end - vma->vm_start;
 123         u32 key = vma->vm_pgoff << PAGE_SHIFT;
 124         struct c4iw_rdev *rdev;
 125         int ret = 0;
 126         struct c4iw_mm_entry *mm;
 127         struct c4iw_ucontext *ucontext;
 128         u64 addr;
 129
 130         PDBG("%s pgoff 0x%lx key 0x%x len %d\n", __func__, vma->vm_pgoff,
 131              key, len);
 132
 133         if (vma->vm_start & (PAGE_SIZE-1))
 134                 return -EINVAL;
 135
 136         rdev = &(to_c4iw_dev(context->device)->rdev);
 137         ucontext = to_c4iw_ucontext(context);
 138
 139         mm = remove_mmap(ucontext, key, len);
 140         if (!mm)
 141                 return -EINVAL;
 142         addr = mm->addr;
 143         kfree(mm);
 144
 145         if ((addr >= pci_resource_start(rdev->lldi.pdev, 0)) &&
 146             (addr < (pci_resource_start(rdev->lldi.pdev, 0) +
 147                     pci_resource_len(rdev->lldi.pdev, 0)))) {
 148
 149                 /*
 150                  * MA_SYNC register...
 151                  */
 152                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 153                 ret = io_remap_pfn_range(vma, vma->vm_start,
 154                                          addr >> PAGE_SHIFT,
 155                                          len, vma->vm_page_prot);
 156         } else if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) &&
 157                    (addr < (pci_resource_start(rdev->lldi.pdev, 2) +
 158                     pci_resource_len(rdev->lldi.pdev, 2)))) {
 159
 160                 /*
 161                  * Map user DB or OCQP memory...
 162                  */
 163                 if (addr >= rdev->oc_mw_pa)
 164                         vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
 165                 else {
 166                         if (is_t5(rdev->lldi.adapter_type))
 167                                 vma->vm_page_prot =
 168                                         t4_pgprot_wc(vma->vm_page_prot);
 169                         else
 170                                 vma->vm_page_prot =
 171                                         pgprot_noncached(vma->vm_page_prot);
 172                 }
 173                 ret = io_remap_pfn_range(vma, vma->vm_start,
 174                                          addr >> PAGE_SHIFT,
 175                                          len, vma->vm_page_prot);
 176         } else {
 177
 178                 /*
 179                  * Map WQ or CQ contig dma memory...
 180                  */
 181                 ret = remap_pfn_range(vma, vma->vm_start,
 182                                       addr >> PAGE_SHIFT,
 183                                       len, vma->vm_page_prot);
 184         }
 185
 186         return ret;
 187 }
 188
 189 static int c4iw_deallocate_pd(struct ib_pd *pd)
 190 {
 191         struct c4iw_dev *rhp;
 192         struct c4iw_pd *php;
 193
 194         php = to_c4iw_pd(pd);
 195         rhp = php->rhp;
 196         PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid);
 197         c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
 198         mutex_lock(&rhp->rdev.stats.lock);
 199         rhp->rdev.stats.pd.cur--;
 200         mutex_unlock(&rhp->rdev.stats.lock);
 201         kfree(php);
 202         return 0;
 203 }
 204
 205 static struct ib_pd *c4iw_allocate_pd(struct ib_device *ibdev,
 206                                       struct ib_ucontext *context,
 207                                       struct ib_udata *udata)
 208 {
 209         struct c4iw_pd *php;
 210         u32 pdid;
 211         struct c4iw_dev *rhp;
 212
 213         PDBG("%s ibdev %p\n", __func__, ibdev);
 214         rhp = (struct c4iw_dev *) ibdev;
 215         pdid =  c4iw_get_resource(&rhp->rdev.resource.pdid_table);
 216         if (!pdid)
 217                 return ERR_PTR(-EINVAL);
 218         php = kzalloc(sizeof(*php), GFP_KERNEL);
 219         if (!php) {
 220                 c4iw_put_resource(&rhp->rdev.resource.pdid_table, pdid);
 221                 return ERR_PTR(-ENOMEM);
 222         }
 223         php->pdid = pdid;
 224         php->rhp = rhp;
 225         if (context) {
 226                 if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
 227                         c4iw_deallocate_pd(&php->ibpd);
 228                         return ERR_PTR(-EFAULT);
 229                 }
 230         }
 231         mutex_lock(&rhp->rdev.stats.lock);
 232         rhp->rdev.stats.pd.cur++;
 233         if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
 234                 rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
 235         mutex_unlock(&rhp->rdev.stats.lock);
 236         PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php);
 237         return &php->ibpd;
 238 }
 239
 240 static int c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 241                            u16 *pkey)
 242 {
 243         PDBG("%s ibdev %p\n", __func__, ibdev);
 244         *pkey = 0;
 245         return 0;
 246 }
 247
 248 static int c4iw_query_gid(struct ib_device *ibdev, u8 port, int index,
 249                           union ib_gid *gid)
 250 {
 251         struct c4iw_dev *dev;
 252
 253         PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
 254                __func__, ibdev, port, index, gid);
 255         dev = to_c4iw_dev(ibdev);
 256         BUG_ON(port == 0);
 257         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 258         memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
 259         return 0;
 260 }
 261
 262 static int c4iw_query_device(struct ib_device *ibdev,
 263                              struct ib_device_attr *props)
 264 {
 265
 266         struct c4iw_dev *dev;
 267         PDBG("%s ibdev %p\n", __func__, ibdev);
 268
 269         dev = to_c4iw_dev(ibdev);
 270         memset(props, 0, sizeof *props);
 271         memcpy(&props->sys_image_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
 272         props->hw_ver = CHELSIO_CHIP_RELEASE(dev->rdev.lldi.adapter_type);
 273         props->fw_ver = dev->rdev.lldi.fw_vers;
 274         props->device_cap_flags = dev->device_cap_flags;
 275         props->page_size_cap = T4_PAGESIZE_MASK;
 276         props->vendor_id = (u32)dev->rdev.lldi.pdev->vendor;
 277         props->vendor_part_id = (u32)dev->rdev.lldi.pdev->device;
 278         props->max_mr_size = T4_MAX_MR_SIZE;
 279         props->max_qp = T4_MAX_NUM_QP;
 280         props->max_qp_wr = T4_MAX_QP_DEPTH;
 281         props->max_sge = T4_MAX_RECV_SGE;
 282         props->max_sge_rd = 1;
 283         props->max_qp_rd_atom = c4iw_max_read_depth;
 284         props->max_qp_init_rd_atom = c4iw_max_read_depth;
 285         props->max_cq = T4_MAX_NUM_CQ;
 286         props->max_cqe = T4_MAX_CQ_DEPTH;
 287         props->max_mr = c4iw_num_stags(&dev->rdev);
 288         props->max_pd = T4_MAX_NUM_PD;
 289         props->local_ca_ack_delay = 0;
 290         props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;
 291
 292         return 0;
 293 }
 294
 295 static int c4iw_query_port(struct ib_device *ibdev, u8 port,
 296                            struct ib_port_attr *props)
 297 {
 298         struct c4iw_dev *dev;
 299         struct net_device *netdev;
 300         struct in_device *inetdev;
 301
 302         PDBG("%s ibdev %p\n", __func__, ibdev);
 303
 304         dev = to_c4iw_dev(ibdev);
 305         netdev = dev->rdev.lldi.ports[port-1];
 306
 307         memset(props, 0, sizeof(struct ib_port_attr));
 308         props->max_mtu = IB_MTU_4096;
 309         if (netdev->mtu >= 4096)
 310                 props->active_mtu = IB_MTU_4096;
 311         else if (netdev->mtu >= 2048)
 312                 props->active_mtu = IB_MTU_2048;
 313         else if (netdev->mtu >= 1024)
 314                 props->active_mtu = IB_MTU_1024;
 315         else if (netdev->mtu >= 512)
 316                 props->active_mtu = IB_MTU_512;
 317         else
 318                 props->active_mtu = IB_MTU_256;
 319
 320         if (!netif_carrier_ok(netdev))
 321                 props->state = IB_PORT_DOWN;
 322         else {
 323                 inetdev = in_dev_get(netdev);
 324                 if (inetdev) {
 325                         if (inetdev->ifa_list)
 326                                 props->state = IB_PORT_ACTIVE;
 327                         else
 328                                 props->state = IB_PORT_INIT;
 329                         in_dev_put(inetdev);
 330                 } else
 331                         props->state = IB_PORT_INIT;
 332         }
 333
 334         props->port_cap_flags =
 335             IB_PORT_CM_SUP |
 336             IB_PORT_SNMP_TUNNEL_SUP |
 337             IB_PORT_REINIT_SUP |
 338             IB_PORT_DEVICE_MGMT_SUP |
 339             IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 340         props->gid_tbl_len = 1;
 341         props->pkey_tbl_len = 1;
 342         props->active_width = 2;
 343         props->active_speed = IB_SPEED_DDR;
 344         props->max_msg_sz = -1;
 345
 346         return 0;
 347 }
 348
 349 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
 350                         char *buf)
 351 {
 352         struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
 353                                                  ibdev.dev);
 354         PDBG("%s dev 0x%p\n", __func__, dev);
 355         return sprintf(buf, "%d\n",
 356                        CHELSIO_CHIP_RELEASE(c4iw_dev->rdev.lldi.adapter_type));
 357 }
 358
 359 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
 360                            char *buf)
 361 {
 362         struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
 363                                                  ibdev.dev);
 364         PDBG("%s dev 0x%p\n", __func__, dev);
 365
 366         return sprintf(buf, "%u.%u.%u.%u\n",
 367                         FW_HDR_FW_VER_MAJOR_GET(c4iw_dev->rdev.lldi.fw_vers),
 368                         FW_HDR_FW_VER_MINOR_GET(c4iw_dev->rdev.lldi.fw_vers),
 369                         FW_HDR_FW_VER_MICRO_GET(c4iw_dev->rdev.lldi.fw_vers),
 370                         FW_HDR_FW_VER_BUILD_GET(c4iw_dev->rdev.lldi.fw_vers));
 371 }
 372
 373 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
 374                         char *buf)
 375 {
 376         struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
 377                                                  ibdev.dev);
 378         struct ethtool_drvinfo info;
 379         struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];
 380
 381         PDBG("%s dev 0x%p\n", __func__, dev);
 382         lldev->ethtool_ops->get_drvinfo(lldev, &info);
 383         return sprintf(buf, "%s\n", info.driver);
 384 }
 385
 386 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
 387                           char *buf)
 388 {
 389         struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
 390                                                  ibdev.dev);
 391         PDBG("%s dev 0x%p\n", __func__, dev);
 392         return sprintf(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
 393                        c4iw_dev->rdev.lldi.pdev->device);
 394 }
 395
 396 static int c4iw_get_mib(struct ib_device *ibdev,
 397                         union rdma_protocol_stats *stats)
 398 {
 399         struct tp_tcp_stats v4, v6;
 400         struct c4iw_dev *c4iw_dev = to_c4iw_dev(ibdev);
 401
 402         cxgb4_get_tcp_stats(c4iw_dev->rdev.lldi.pdev, &v4, &v6);
 403         memset(stats, 0, sizeof *stats);
 404         stats->iw.tcpInSegs = v4.tcpInSegs + v6.tcpInSegs;
 405         stats->iw.tcpOutSegs = v4.tcpOutSegs + v6.tcpOutSegs;
 406         stats->iw.tcpRetransSegs = v4.tcpRetransSegs + v6.tcpRetransSegs;
 407         stats->iw.tcpOutRsts = v4.tcpOutRsts + v6.tcpOutSegs;
 408
 409         return 0;
 410 }
 411
 412 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
 413 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
 414 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
 415 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
 416
 417 static struct device_attribute *c4iw_class_attributes[] = {
 418         &dev_attr_hw_rev,
 419         &dev_attr_fw_ver,
 420         &dev_attr_hca_type,
 421         &dev_attr_board_id,
 422 };
 423
 424 int c4iw_register_device(struct c4iw_dev *dev)
 425 {
 426         int ret;
 427         int i;
 428
 429         PDBG("%s c4iw_dev %p\n", __func__, dev);
 430         BUG_ON(!dev->rdev.lldi.ports[0]);
 431         strlcpy(dev->ibdev.name, "cxgb4_%d", IB_DEVICE_NAME_MAX);
 432         memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
 433         memcpy(&dev->ibdev.node_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
 434         dev->ibdev.owner = THIS_MODULE;
 435         dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
 436         if (fastreg_support)
 437                 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
 438         dev->ibdev.local_dma_lkey = 0;
 439         dev->ibdev.uverbs_cmd_mask =
 440             (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
 441             (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
 442             (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
 443             (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
 444             (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
 445             (1ull << IB_USER_VERBS_CMD_REG_MR) |
 446             (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
 447             (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 448             (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
 449             (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
 450             (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
 451             (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
 452             (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
 453             (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
 454             (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
 455             (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
 456             (1ull << IB_USER_VERBS_CMD_POST_SEND) |
 457             (1ull << IB_USER_VERBS_CMD_POST_RECV);
 458         dev->ibdev.node_type = RDMA_NODE_RNIC;
 459         memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
 460         dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
 461         dev->ibdev.num_comp_vectors = 1;
 462         dev->ibdev.dma_device = &(dev->rdev.lldi.pdev->dev);
 463         dev->ibdev.query_device = c4iw_query_device;
 464         dev->ibdev.query_port = c4iw_query_port;
 465         dev->ibdev.query_pkey = c4iw_query_pkey;
 466         dev->ibdev.query_gid = c4iw_query_gid;
 467         dev->ibdev.alloc_ucontext = c4iw_alloc_ucontext;
 468         dev->ibdev.dealloc_ucontext = c4iw_dealloc_ucontext;
 469         dev->ibdev.mmap = c4iw_mmap;
 470         dev->ibdev.alloc_pd = c4iw_allocate_pd;
 471         dev->ibdev.dealloc_pd = c4iw_deallocate_pd;
 472         dev->ibdev.create_ah = c4iw_ah_create;
 473         dev->ibdev.destroy_ah = c4iw_ah_destroy;
 474         dev->ibdev.create_qp = c4iw_create_qp;
 475         dev->ibdev.modify_qp = c4iw_ib_modify_qp;
 476         dev->ibdev.query_qp = c4iw_ib_query_qp;
 477         dev->ibdev.destroy_qp = c4iw_destroy_qp;
 478         dev->ibdev.create_cq = c4iw_create_cq;
 479         dev->ibdev.destroy_cq = c4iw_destroy_cq;
 480         dev->ibdev.resize_cq = c4iw_resize_cq;
 481         dev->ibdev.poll_cq = c4iw_poll_cq;
 482         dev->ibdev.get_dma_mr = c4iw_get_dma_mr;
 483         dev->ibdev.reg_phys_mr = c4iw_register_phys_mem;
 484         dev->ibdev.rereg_phys_mr = c4iw_reregister_phys_mem;
 485         dev->ibdev.reg_user_mr = c4iw_reg_user_mr;
 486         dev->ibdev.dereg_mr = c4iw_dereg_mr;
 487         dev->ibdev.alloc_mw = c4iw_alloc_mw;
 488         dev->ibdev.bind_mw = c4iw_bind_mw;
 489         dev->ibdev.dealloc_mw = c4iw_dealloc_mw;
 490         dev->ibdev.alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr;
 491         dev->ibdev.alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl;
 492         dev->ibdev.free_fast_reg_page_list = c4iw_free_fastreg_pbl;
 493         dev->ibdev.attach_mcast = c4iw_multicast_attach;
 494         dev->ibdev.detach_mcast = c4iw_multicast_detach;
 495         dev->ibdev.process_mad = c4iw_process_mad;
 496         dev->ibdev.req_notify_cq = c4iw_arm_cq;
 497         dev->ibdev.post_send = c4iw_post_send;
 498         dev->ibdev.post_recv = c4iw_post_receive;
 499         dev->ibdev.get_protocol_stats = c4iw_get_mib;
 500         dev->ibdev.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
 501
 502         dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
 503         if (!dev->ibdev.iwcm)
 504                 return -ENOMEM;
 505
 506         dev->ibdev.iwcm->connect = c4iw_connect;
 507         dev->ibdev.iwcm->accept = c4iw_accept_cr;
 508         dev->ibdev.iwcm->reject = c4iw_reject_cr;
 509         dev->ibdev.iwcm->create_listen = c4iw_create_listen;
 510         dev->ibdev.iwcm->destroy_listen = c4iw_destroy_listen;
 511         dev->ibdev.iwcm->add_ref = c4iw_qp_add_ref;
 512         dev->ibdev.iwcm->rem_ref = c4iw_qp_rem_ref;
 513         dev->ibdev.iwcm->get_qp = c4iw_get_qp;
 514
 515         ret = ib_register_device(&dev->ibdev, NULL);
 516         if (ret)
 517                 goto bail1;
 518
 519         for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i) {
 520                 ret = device_create_file(&dev->ibdev.dev,
 521                                          c4iw_class_attributes[i]);
 522                 if (ret)
 523                         goto bail2;
 524         }
 525         return 0;
 526 bail2:
 527         ib_unregister_device(&dev->ibdev);
 528 bail1:
 529         kfree(dev->ibdev.iwcm);
 530         return ret;
 531 }
 532
 533 void c4iw_unregister_device(struct c4iw_dev *dev)
 534 {
 535         int i;
 536
 537         PDBG("%s c4iw_dev %p\n", __func__, dev);
 538         for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i)
 539                 device_remove_file(&dev->ibdev.dev,
 540                                    c4iw_class_attributes[i]);
 541         ib_unregister_device(&dev->ibdev);
 542         kfree(dev->ibdev.iwcm);
 543         return;
 544 }