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;
  58 module_param(fastreg_support, int, 0644);
  59 MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default=0)");
  60
  61 static int c4iw_modify_port(struct ib_device *ibdev,
  62                             u8 port, int port_modify_mask,
  63                             struct ib_port_modify *props)
  64 {
  65         return -ENOSYS;
  66 }
  67
  68 static struct ib_ah *c4iw_ah_create(struct ib_pd *pd,
  69                                     struct ib_ah_attr *ah_attr)
  70 {
  71         return ERR_PTR(-ENOSYS);
  72 }
  73
  74 static int c4iw_ah_destroy(struct ib_ah *ah)
  75 {
  76         return -ENOSYS;
  77 }
  78
  79 static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
  80 {
  81         return -ENOSYS;
  82 }
  83
  84 static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
  85 {
  86         return -ENOSYS;
  87 }
  88
  89 static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags,
  90                             u8 port_num, struct ib_wc *in_wc,
  91                             struct ib_grh *in_grh, struct ib_mad *in_mad,
  92                             struct ib_mad *out_mad)
  93 {
  94         return -ENOSYS;
  95 }
  96
  97 static int c4iw_dealloc_ucontext(struct ib_ucontext *context)
  98 {
  99         struct c4iw_dev *rhp = to_c4iw_dev(context->device);
 100         struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
 101         struct c4iw_mm_entry *mm, *tmp;
 102
 103         PDBG("%s context %p\n", __func__, context);
 104         list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
 105                 kfree(mm);
 106         c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
 107         kfree(ucontext);
 108         return 0;
 109 }
 110
 111 static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev,
 112                                                struct ib_udata *udata)
 113 {
 114         struct c4iw_ucontext *context;
 115         struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
 116
 117         PDBG("%s ibdev %p\n", __func__, ibdev);
 118         context = kzalloc(sizeof(*context), GFP_KERNEL);
 119         if (!context)
 120                 return ERR_PTR(-ENOMEM);
 121         c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
 122         INIT_LIST_HEAD(&context->mmaps);
 123         spin_lock_init(&context->mmap_lock);
 124         return &context->ibucontext;
 125 }
 126
 127 static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 128 {
 129         int len = vma->vm_end - vma->vm_start;
 130         u32 key = vma->vm_pgoff << PAGE_SHIFT;
 131         struct c4iw_rdev *rdev;
 132         int ret = 0;
 133         struct c4iw_mm_entry *mm;
 134         struct c4iw_ucontext *ucontext;
 135         u64 addr;
 136
 137         PDBG("%s pgoff 0x%lx key 0x%x len %d\n", __func__, vma->vm_pgoff,
 138              key, len);
 139
 140         if (vma->vm_start & (PAGE_SIZE-1))
 141                 return -EINVAL;
 142
 143         rdev = &(to_c4iw_dev(context->device)->rdev);
 144         ucontext = to_c4iw_ucontext(context);
 145
 146         mm = remove_mmap(ucontext, key, len);
 147         if (!mm)
 148                 return -EINVAL;
 149         addr = mm->addr;
 150         kfree(mm);
 151
 152         if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) &&
 153             (addr < (pci_resource_start(rdev->lldi.pdev, 2) +
 154                        pci_resource_len(rdev->lldi.pdev, 2)))) {
 155
 156                 /*
 157                  * Map T4 DB register.
 158                  */
 159                 if (vma->vm_flags & VM_READ)
 160                         return -EPERM;
 161
 162                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 163                 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
 164                 vma->vm_flags &= ~VM_MAYREAD;
 165                 ret = io_remap_pfn_range(vma, vma->vm_start,
 166                                          addr >> PAGE_SHIFT,
 167                                          len, vma->vm_page_prot);
 168         } else {
 169
 170                 /*
 171                  * Map WQ or CQ contig dma memory...
 172                  */
 173                 ret = remap_pfn_range(vma, vma->vm_start,
 174                                       addr >> PAGE_SHIFT,
 175                                       len, vma->vm_page_prot);
 176         }
 177
 178         return ret;
 179 }
 180
 181 static int c4iw_deallocate_pd(struct ib_pd *pd)
 182 {
 183         struct c4iw_dev *rhp;
 184         struct c4iw_pd *php;
 185
 186         php = to_c4iw_pd(pd);
 187         rhp = php->rhp;
 188         PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid);
 189         c4iw_put_resource(&rhp->rdev.resource.pdid_fifo, php->pdid,
 190                           &rhp->rdev.resource.pdid_fifo_lock);
 191         kfree(php);
 192         return 0;
 193 }
 194
 195 static struct ib_pd *c4iw_allocate_pd(struct ib_device *ibdev,
 196                                       struct ib_ucontext *context,
 197                                       struct ib_udata *udata)
 198 {
 199         struct c4iw_pd *php;
 200         u32 pdid;
 201         struct c4iw_dev *rhp;
 202
 203         PDBG("%s ibdev %p\n", __func__, ibdev);
 204         rhp = (struct c4iw_dev *) ibdev;
 205         pdid =  c4iw_get_resource(&rhp->rdev.resource.pdid_fifo,
 206                                   &rhp->rdev.resource.pdid_fifo_lock);
 207         if (!pdid)
 208                 return ERR_PTR(-EINVAL);
 209         php = kzalloc(sizeof(*php), GFP_KERNEL);
 210         if (!php) {
 211                 c4iw_put_resource(&rhp->rdev.resource.pdid_fifo, pdid,
 212                                   &rhp->rdev.resource.pdid_fifo_lock);
 213                 return ERR_PTR(-ENOMEM);
 214         }
 215         php->pdid = pdid;
 216         php->rhp = rhp;
 217         if (context) {
 218                 if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
 219                         c4iw_deallocate_pd(&php->ibpd);
 220                         return ERR_PTR(-EFAULT);
 221                 }
 222         }
 223         PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php);
 224         return &php->ibpd;
 225 }
 226
 227 static int c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 228                            u16 *pkey)
 229 {
 230         PDBG("%s ibdev %p\n", __func__, ibdev);
 231         *pkey = 0;
 232         return 0;
 233 }
 234
 235 static int c4iw_query_gid(struct ib_device *ibdev, u8 port, int index,
 236                           union ib_gid *gid)
 237 {
 238         struct c4iw_dev *dev;
 239
 240         PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
 241                __func__, ibdev, port, index, gid);
 242         dev = to_c4iw_dev(ibdev);
 243         BUG_ON(port == 0);
 244         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 245         memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
 246         return 0;
 247 }
 248
 249 static int c4iw_query_device(struct ib_device *ibdev,
 250                              struct ib_device_attr *props)
 251 {
 252
 253         struct c4iw_dev *dev;
 254         PDBG("%s ibdev %p\n", __func__, ibdev);
 255
 256         dev = to_c4iw_dev(ibdev);
 257         memset(props, 0, sizeof *props);
 258         memcpy(&props->sys_image_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
 259         props->hw_ver = dev->rdev.lldi.adapter_type;
 260         props->fw_ver = dev->rdev.lldi.fw_vers;
 261         props->device_cap_flags = dev->device_cap_flags;
 262         props->page_size_cap = T4_PAGESIZE_MASK;
 263         props->vendor_id = (u32)dev->rdev.lldi.pdev->vendor;
 264         props->vendor_part_id = (u32)dev->rdev.lldi.pdev->device;
 265         props->max_mr_size = T4_MAX_MR_SIZE;
 266         props->max_qp = T4_MAX_NUM_QP;
 267         props->max_qp_wr = T4_MAX_QP_DEPTH;
 268         props->max_sge = T4_MAX_RECV_SGE;
 269         props->max_sge_rd = 1;
 270         props->max_qp_rd_atom = c4iw_max_read_depth;
 271         props->max_qp_init_rd_atom = c4iw_max_read_depth;
 272         props->max_cq = T4_MAX_NUM_CQ;
 273         props->max_cqe = T4_MAX_CQ_DEPTH;
 274         props->max_mr = c4iw_num_stags(&dev->rdev);
 275         props->max_pd = T4_MAX_NUM_PD;
 276         props->local_ca_ack_delay = 0;
 277         props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;
 278
 279         return 0;
 280 }
 281
 282 static int c4iw_query_port(struct ib_device *ibdev, u8 port,
 283                            struct ib_port_attr *props)
 284 {
 285         struct c4iw_dev *dev;
 286         struct net_device *netdev;
 287         struct in_device *inetdev;
 288
 289         PDBG("%s ibdev %p\n", __func__, ibdev);
 290
 291         dev = to_c4iw_dev(ibdev);
 292         netdev = dev->rdev.lldi.ports[port-1];
 293
 294         memset(props, 0, sizeof(struct ib_port_attr));
 295         props->max_mtu = IB_MTU_4096;
 296         if (netdev->mtu >= 4096)
 297                 props->active_mtu = IB_MTU_4096;
 298         else if (netdev->mtu >= 2048)
 299                 props->active_mtu = IB_MTU_2048;
 300         else if (netdev->mtu >= 1024)
 301                 props->active_mtu = IB_MTU_1024;
 302         else if (netdev->mtu >= 512)
 303                 props->active_mtu = IB_MTU_512;
 304         else
 305                 props->active_mtu = IB_MTU_256;
 306
 307         if (!netif_carrier_ok(netdev))
 308                 props->state = IB_PORT_DOWN;
 309         else {
 310                 inetdev = in_dev_get(netdev);
 311                 if (inetdev) {
 312                         if (inetdev->ifa_list)
 313                                 props->state = IB_PORT_ACTIVE;
 314                         else
 315                                 props->state = IB_PORT_INIT;
 316                         in_dev_put(inetdev);
 317                 } else
 318                         props->state = IB_PORT_INIT;
 319         }
 320
 321         props->port_cap_flags =
 322             IB_PORT_CM_SUP |
 323             IB_PORT_SNMP_TUNNEL_SUP |
 324             IB_PORT_REINIT_SUP |
 325             IB_PORT_DEVICE_MGMT_SUP |
 326             IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 327         props->gid_tbl_len = 1;
 328         props->pkey_tbl_len = 1;
 329         props->active_width = 2;
 330         props->active_speed = 2;
 331         props->max_msg_sz = -1;
 332
 333         return 0;
 334 }
 335
 336 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
 337                         char *buf)
 338 {
 339         struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
 340                                                  ibdev.dev);
 341         PDBG("%s dev 0x%p\n", __func__, dev);
 342         return sprintf(buf, "%d\n", c4iw_dev->rdev.lldi.adapter_type);
 343 }
 344
 345 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
 346                            char *buf)
 347 {
 348         struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
 349                                                  ibdev.dev);
 350         PDBG("%s dev 0x%p\n", __func__, dev);
 351
 352         return sprintf(buf, "%u.%u.%u.%u\n",
 353                         FW_HDR_FW_VER_MAJOR_GET(c4iw_dev->rdev.lldi.fw_vers),
 354                         FW_HDR_FW_VER_MINOR_GET(c4iw_dev->rdev.lldi.fw_vers),
 355                         FW_HDR_FW_VER_MICRO_GET(c4iw_dev->rdev.lldi.fw_vers),
 356                         FW_HDR_FW_VER_BUILD_GET(c4iw_dev->rdev.lldi.fw_vers));
 357 }
 358
 359 static ssize_t show_hca(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         struct ethtool_drvinfo info;
 365         struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];
 366
 367         PDBG("%s dev 0x%p\n", __func__, dev);
 368         lldev->ethtool_ops->get_drvinfo(lldev, &info);
 369         return sprintf(buf, "%s\n", info.driver);
 370 }
 371
 372 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
 373                           char *buf)
 374 {
 375         struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
 376                                                  ibdev.dev);
 377         PDBG("%s dev 0x%p\n", __func__, dev);
 378         return sprintf(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
 379                        c4iw_dev->rdev.lldi.pdev->device);
 380 }
 381
 382 static int c4iw_get_mib(struct ib_device *ibdev,
 383                         union rdma_protocol_stats *stats)
 384 {
 385         return -ENOSYS;
 386 }
 387
 388 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
 389 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
 390 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
 391 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
 392
 393 static struct device_attribute *c4iw_class_attributes[] = {
 394         &dev_attr_hw_rev,
 395         &dev_attr_fw_ver,
 396         &dev_attr_hca_type,
 397         &dev_attr_board_id,
 398 };
 399
 400 int c4iw_register_device(struct c4iw_dev *dev)
 401 {
 402         int ret;
 403         int i;
 404
 405         PDBG("%s c4iw_dev %p\n", __func__, dev);
 406         BUG_ON(!dev->rdev.lldi.ports[0]);
 407         strlcpy(dev->ibdev.name, "cxgb4_%d", IB_DEVICE_NAME_MAX);
 408         memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
 409         memcpy(&dev->ibdev.node_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
 410         dev->ibdev.owner = THIS_MODULE;
 411         dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
 412         if (fastreg_support)
 413                 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
 414         dev->ibdev.local_dma_lkey = 0;
 415         dev->ibdev.uverbs_cmd_mask =
 416             (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
 417             (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
 418             (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
 419             (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
 420             (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
 421             (1ull << IB_USER_VERBS_CMD_REG_MR) |
 422             (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
 423             (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 424             (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
 425             (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
 426             (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
 427             (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
 428             (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
 429             (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
 430             (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
 431             (1ull << IB_USER_VERBS_CMD_POST_SEND) |
 432             (1ull << IB_USER_VERBS_CMD_POST_RECV);
 433         dev->ibdev.node_type = RDMA_NODE_RNIC;
 434         memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
 435         dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
 436         dev->ibdev.num_comp_vectors = 1;
 437         dev->ibdev.dma_device = &(dev->rdev.lldi.pdev->dev);
 438         dev->ibdev.query_device = c4iw_query_device;
 439         dev->ibdev.query_port = c4iw_query_port;
 440         dev->ibdev.modify_port = c4iw_modify_port;
 441         dev->ibdev.query_pkey = c4iw_query_pkey;
 442         dev->ibdev.query_gid = c4iw_query_gid;
 443         dev->ibdev.alloc_ucontext = c4iw_alloc_ucontext;
 444         dev->ibdev.dealloc_ucontext = c4iw_dealloc_ucontext;
 445         dev->ibdev.mmap = c4iw_mmap;
 446         dev->ibdev.alloc_pd = c4iw_allocate_pd;
 447         dev->ibdev.dealloc_pd = c4iw_deallocate_pd;
 448         dev->ibdev.create_ah = c4iw_ah_create;
 449         dev->ibdev.destroy_ah = c4iw_ah_destroy;
 450         dev->ibdev.create_qp = c4iw_create_qp;
 451         dev->ibdev.modify_qp = c4iw_ib_modify_qp;
 452         dev->ibdev.destroy_qp = c4iw_destroy_qp;
 453         dev->ibdev.create_cq = c4iw_create_cq;
 454         dev->ibdev.destroy_cq = c4iw_destroy_cq;
 455         dev->ibdev.resize_cq = c4iw_resize_cq;
 456         dev->ibdev.poll_cq = c4iw_poll_cq;
 457         dev->ibdev.get_dma_mr = c4iw_get_dma_mr;
 458         dev->ibdev.reg_phys_mr = c4iw_register_phys_mem;
 459         dev->ibdev.rereg_phys_mr = c4iw_reregister_phys_mem;
 460         dev->ibdev.reg_user_mr = c4iw_reg_user_mr;
 461         dev->ibdev.dereg_mr = c4iw_dereg_mr;
 462         dev->ibdev.alloc_mw = c4iw_alloc_mw;
 463         dev->ibdev.bind_mw = c4iw_bind_mw;
 464         dev->ibdev.dealloc_mw = c4iw_dealloc_mw;
 465         dev->ibdev.alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr;
 466         dev->ibdev.alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl;
 467         dev->ibdev.free_fast_reg_page_list = c4iw_free_fastreg_pbl;
 468         dev->ibdev.attach_mcast = c4iw_multicast_attach;
 469         dev->ibdev.detach_mcast = c4iw_multicast_detach;
 470         dev->ibdev.process_mad = c4iw_process_mad;
 471         dev->ibdev.req_notify_cq = c4iw_arm_cq;
 472         dev->ibdev.post_send = c4iw_post_send;
 473         dev->ibdev.post_recv = c4iw_post_receive;
 474         dev->ibdev.get_protocol_stats = c4iw_get_mib;
 475
 476         dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
 477         if (!dev->ibdev.iwcm)
 478                 return -ENOMEM;
 479
 480         dev->ibdev.iwcm->connect = c4iw_connect;
 481         dev->ibdev.iwcm->accept = c4iw_accept_cr;
 482         dev->ibdev.iwcm->reject = c4iw_reject_cr;
 483         dev->ibdev.iwcm->create_listen = c4iw_create_listen;
 484         dev->ibdev.iwcm->destroy_listen = c4iw_destroy_listen;
 485         dev->ibdev.iwcm->add_ref = c4iw_qp_add_ref;
 486         dev->ibdev.iwcm->rem_ref = c4iw_qp_rem_ref;
 487         dev->ibdev.iwcm->get_qp = c4iw_get_qp;
 488
 489         ret = ib_register_device(&dev->ibdev, NULL);
 490         if (ret)
 491                 goto bail1;
 492
 493         for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i) {
 494                 ret = device_create_file(&dev->ibdev.dev,
 495                                          c4iw_class_attributes[i]);
 496                 if (ret)
 497                         goto bail2;
 498         }
 499         dev->registered = 1;
 500         return 0;
 501 bail2:
 502         ib_unregister_device(&dev->ibdev);
 503 bail1:
 504         kfree(dev->ibdev.iwcm);
 505         return ret;
 506 }
 507
 508 void c4iw_unregister_device(struct c4iw_dev *dev)
 509 {
 510         int i;
 511
 512         PDBG("%s c4iw_dev %p\n", __func__, dev);
 513         for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i)
 514                 device_remove_file(&dev->ibdev.dev,
 515                                    c4iw_class_attributes[i]);
 516         ib_unregister_device(&dev->ibdev);
 517         kfree(dev->ibdev.iwcm);
 518         dev->registered = 0;
 519         return;
 520 }