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 void c4iw_dealloc_ucontext(struct ib_ucontext *context)
  62 {
  63         struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
  64         struct c4iw_dev *rhp;
  65         struct c4iw_mm_entry *mm, *tmp;
  66
  67         pr_debug("context %p\n", context);
  68         rhp = to_c4iw_dev(ucontext->ibucontext.device);
  69
  70         list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
  71                 kfree(mm);
  72         c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
  73 }
  74
  75 static int c4iw_alloc_ucontext(struct ib_ucontext *ucontext,
  76                                struct ib_udata *udata)
  77 {
  78         struct ib_device *ibdev = ucontext->device;
  79         struct c4iw_ucontext *context = to_c4iw_ucontext(ucontext);
  80         struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
  81         struct c4iw_alloc_ucontext_resp uresp;
  82         int ret = 0;
  83         struct c4iw_mm_entry *mm = NULL;
  84
  85         pr_debug("ibdev %p\n", ibdev);
  86         c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
  87         INIT_LIST_HEAD(&context->mmaps);
  88         spin_lock_init(&context->mmap_lock);
  89
  90         if (udata->outlen < sizeof(uresp) - sizeof(uresp.reserved)) {
  91                 pr_err_once("Warning - downlevel libcxgb4 (non-fatal), device status page disabled\n");
  92                 rhp->rdev.flags |= T4_STATUS_PAGE_DISABLED;
  93         } else {
  94                 mm = kmalloc(sizeof(*mm), GFP_KERNEL);
  95                 if (!mm) {
  96                         ret = -ENOMEM;
  97                         goto err;
  98                 }
  99
 100                 uresp.status_page_size = PAGE_SIZE;
 101
 102                 spin_lock(&context->mmap_lock);
 103                 uresp.status_page_key = context->key;
 104                 context->key += PAGE_SIZE;
 105                 spin_unlock(&context->mmap_lock);
 106
 107                 ret = ib_copy_to_udata(udata, &uresp,
 108                                        sizeof(uresp) - sizeof(uresp.reserved));
 109                 if (ret)
 110                         goto err_mm;
 111
 112                 mm->key = uresp.status_page_key;
 113                 mm->addr = virt_to_phys(rhp->rdev.status_page);
 114                 mm->len = PAGE_SIZE;
 115                 insert_mmap(context, mm);
 116         }
 117         return 0;
 118 err_mm:
 119         kfree(mm);
 120 err:
 121         return ret;
 122 }
 123
 124 static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 125 {
 126         int len = vma->vm_end - vma->vm_start;
 127         u32 key = vma->vm_pgoff << PAGE_SHIFT;
 128         struct c4iw_rdev *rdev;
 129         int ret = 0;
 130         struct c4iw_mm_entry *mm;
 131         struct c4iw_ucontext *ucontext;
 132         u64 addr;
 133
 134         pr_debug("pgoff 0x%lx key 0x%x len %d\n", vma->vm_pgoff,
 135                  key, len);
 136
 137         if (vma->vm_start & (PAGE_SIZE-1))
 138                 return -EINVAL;
 139
 140         rdev = &(to_c4iw_dev(context->device)->rdev);
 141         ucontext = to_c4iw_ucontext(context);
 142
 143         mm = remove_mmap(ucontext, key, len);
 144         if (!mm)
 145                 return -EINVAL;
 146         addr = mm->addr;
 147         kfree(mm);
 148
 149         if ((addr >= pci_resource_start(rdev->lldi.pdev, 0)) &&
 150             (addr < (pci_resource_start(rdev->lldi.pdev, 0) +
 151                     pci_resource_len(rdev->lldi.pdev, 0)))) {
 152
 153                 /*
 154                  * MA_SYNC register...
 155                  */
 156                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 157                 ret = io_remap_pfn_range(vma, vma->vm_start,
 158                                          addr >> PAGE_SHIFT,
 159                                          len, vma->vm_page_prot);
 160         } else if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) &&
 161                    (addr < (pci_resource_start(rdev->lldi.pdev, 2) +
 162                     pci_resource_len(rdev->lldi.pdev, 2)))) {
 163
 164                 /*
 165                  * Map user DB or OCQP memory...
 166                  */
 167                 if (addr >= rdev->oc_mw_pa)
 168                         vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
 169                 else {
 170                         if (!is_t4(rdev->lldi.adapter_type))
 171                                 vma->vm_page_prot =
 172                                         t4_pgprot_wc(vma->vm_page_prot);
 173                         else
 174                                 vma->vm_page_prot =
 175                                         pgprot_noncached(vma->vm_page_prot);
 176                 }
 177                 ret = io_remap_pfn_range(vma, vma->vm_start,
 178                                          addr >> PAGE_SHIFT,
 179                                          len, vma->vm_page_prot);
 180         } else {
 181
 182                 /*
 183                  * Map WQ or CQ contig dma memory...
 184                  */
 185                 ret = remap_pfn_range(vma, vma->vm_start,
 186                                       addr >> PAGE_SHIFT,
 187                                       len, vma->vm_page_prot);
 188         }
 189
 190         return ret;
 191 }
 192
 193 static int c4iw_deallocate_pd(struct ib_pd *pd, struct ib_udata *udata)
 194 {
 195         struct c4iw_dev *rhp;
 196         struct c4iw_pd *php;
 197
 198         php = to_c4iw_pd(pd);
 199         rhp = php->rhp;
 200         pr_debug("ibpd %p pdid 0x%x\n", pd, php->pdid);
 201         c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
 202         mutex_lock(&rhp->rdev.stats.lock);
 203         rhp->rdev.stats.pd.cur--;
 204         mutex_unlock(&rhp->rdev.stats.lock);
 205         return 0;
 206 }
 207
 208 static int c4iw_allocate_pd(struct ib_pd *pd, struct ib_udata *udata)
 209 {
 210         struct c4iw_pd *php = to_c4iw_pd(pd);
 211         struct ib_device *ibdev = pd->device;
 212         u32 pdid;
 213         struct c4iw_dev *rhp;
 214
 215         pr_debug("ibdev %p\n", ibdev);
 216         rhp = (struct c4iw_dev *) ibdev;
 217         pdid =  c4iw_get_resource(&rhp->rdev.resource.pdid_table);
 218         if (!pdid)
 219                 return -EINVAL;
 220
 221         php->pdid = pdid;
 222         php->rhp = rhp;
 223         if (udata) {
 224                 struct c4iw_alloc_pd_resp uresp = {.pdid = php->pdid};
 225
 226                 if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
 227                         c4iw_deallocate_pd(&php->ibpd, udata);
 228                         return -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         pr_debug("pdid 0x%0x ptr 0x%p\n", pdid, php);
 237         return 0;
 238 }
 239
 240 static int c4iw_query_gid(struct ib_device *ibdev, u8 port, int index,
 241                           union ib_gid *gid)
 242 {
 243         struct c4iw_dev *dev;
 244
 245         pr_debug("ibdev %p, port %d, index %d, gid %p\n",
 246                  ibdev, port, index, gid);
 247         if (!port)
 248                 return -EINVAL;
 249         dev = to_c4iw_dev(ibdev);
 250         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 251         memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
 252         return 0;
 253 }
 254
 255 static int c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
 256                              struct ib_udata *uhw)
 257 {
 258
 259         struct c4iw_dev *dev;
 260
 261         pr_debug("ibdev %p\n", ibdev);
 262
 263         if (uhw->inlen || uhw->outlen)
 264                 return -EINVAL;
 265
 266         dev = to_c4iw_dev(ibdev);
 267         memcpy(&props->sys_image_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
 268         props->hw_ver = CHELSIO_CHIP_RELEASE(dev->rdev.lldi.adapter_type);
 269         props->fw_ver = dev->rdev.lldi.fw_vers;
 270         props->device_cap_flags = dev->device_cap_flags;
 271         props->page_size_cap = T4_PAGESIZE_MASK;
 272         props->vendor_id = (u32)dev->rdev.lldi.pdev->vendor;
 273         props->vendor_part_id = (u32)dev->rdev.lldi.pdev->device;
 274         props->max_mr_size = T4_MAX_MR_SIZE;
 275         props->max_qp = dev->rdev.lldi.vr->qp.size / 2;
 276         props->max_srq = dev->rdev.lldi.vr->srq.size;
 277         props->max_qp_wr = dev->rdev.hw_queue.t4_max_qp_depth;
 278         props->max_srq_wr = dev->rdev.hw_queue.t4_max_qp_depth;
 279         props->max_send_sge = min(T4_MAX_SEND_SGE, T4_MAX_WRITE_SGE);
 280         props->max_recv_sge = T4_MAX_RECV_SGE;
 281         props->max_srq_sge = T4_MAX_RECV_SGE;
 282         props->max_sge_rd = 1;
 283         props->max_res_rd_atom = dev->rdev.lldi.max_ird_adapter;
 284         props->max_qp_rd_atom = min(dev->rdev.lldi.max_ordird_qp,
 285                                     c4iw_max_read_depth);
 286         props->max_qp_init_rd_atom = props->max_qp_rd_atom;
 287         props->max_cq = dev->rdev.lldi.vr->qp.size;
 288         props->max_cqe = dev->rdev.hw_queue.t4_max_cq_depth;
 289         props->max_mr = c4iw_num_stags(&dev->rdev);
 290         props->max_pd = T4_MAX_NUM_PD;
 291         props->local_ca_ack_delay = 0;
 292         props->max_fast_reg_page_list_len =
 293                 t4_max_fr_depth(dev->rdev.lldi.ulptx_memwrite_dsgl && use_dsgl);
 294
 295         return 0;
 296 }
 297
 298 static int c4iw_query_port(struct ib_device *ibdev, u8 port,
 299                            struct ib_port_attr *props)
 300 {
 301         int ret = 0;
 302         pr_debug("ibdev %p\n", ibdev);
 303         ret = ib_get_eth_speed(ibdev, port, &props->active_speed,
 304                                &props->active_width);
 305
 306         props->port_cap_flags =
 307             IB_PORT_CM_SUP |
 308             IB_PORT_SNMP_TUNNEL_SUP |
 309             IB_PORT_REINIT_SUP |
 310             IB_PORT_DEVICE_MGMT_SUP |
 311             IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 312         props->gid_tbl_len = 1;
 313         props->max_msg_sz = -1;
 314
 315         return ret;
 316 }
 317
 318 static ssize_t hw_rev_show(struct device *dev,
 319                            struct device_attribute *attr, char *buf)
 320 {
 321         struct c4iw_dev *c4iw_dev =
 322                         rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
 323
 324         pr_debug("dev 0x%p\n", dev);
 325         return sysfs_emit(
 326                 buf, "%d\n",
 327                 CHELSIO_CHIP_RELEASE(c4iw_dev->rdev.lldi.adapter_type));
 328 }
 329 static DEVICE_ATTR_RO(hw_rev);
 330
 331 static ssize_t hca_type_show(struct device *dev,
 332                              struct device_attribute *attr, char *buf)
 333 {
 334         struct c4iw_dev *c4iw_dev =
 335                         rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
 336         struct ethtool_drvinfo info;
 337         struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];
 338
 339         pr_debug("dev 0x%p\n", dev);
 340         lldev->ethtool_ops->get_drvinfo(lldev, &info);
 341         return sysfs_emit(buf, "%s\n", info.driver);
 342 }
 343 static DEVICE_ATTR_RO(hca_type);
 344
 345 static ssize_t board_id_show(struct device *dev, struct device_attribute *attr,
 346                              char *buf)
 347 {
 348         struct c4iw_dev *c4iw_dev =
 349                         rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
 350
 351         pr_debug("dev 0x%p\n", dev);
 352         return sysfs_emit(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
 353                           c4iw_dev->rdev.lldi.pdev->device);
 354 }
 355 static DEVICE_ATTR_RO(board_id);
 356
 357 enum counters {
 358         IP4INSEGS,
 359         IP4OUTSEGS,
 360         IP4RETRANSSEGS,
 361         IP4OUTRSTS,
 362         IP6INSEGS,
 363         IP6OUTSEGS,
 364         IP6RETRANSSEGS,
 365         IP6OUTRSTS,
 366         NR_COUNTERS
 367 };
 368
 369 static const char * const names[] = {
 370         [IP4INSEGS] = "ip4InSegs",
 371         [IP4OUTSEGS] = "ip4OutSegs",
 372         [IP4RETRANSSEGS] = "ip4RetransSegs",
 373         [IP4OUTRSTS] = "ip4OutRsts",
 374         [IP6INSEGS] = "ip6InSegs",
 375         [IP6OUTSEGS] = "ip6OutSegs",
 376         [IP6RETRANSSEGS] = "ip6RetransSegs",
 377         [IP6OUTRSTS] = "ip6OutRsts"
 378 };
 379
 380 static struct rdma_hw_stats *c4iw_alloc_stats(struct ib_device *ibdev,
 381                                               u8 port_num)
 382 {
 383         BUILD_BUG_ON(ARRAY_SIZE(names) != NR_COUNTERS);
 384
 385         if (port_num != 0)
 386                 return NULL;
 387
 388         return rdma_alloc_hw_stats_struct(names, NR_COUNTERS,
 389                                           RDMA_HW_STATS_DEFAULT_LIFESPAN);
 390 }
 391
 392 static int c4iw_get_mib(struct ib_device *ibdev,
 393                         struct rdma_hw_stats *stats,
 394                         u8 port, int index)
 395 {
 396         struct tp_tcp_stats v4, v6;
 397         struct c4iw_dev *c4iw_dev = to_c4iw_dev(ibdev);
 398
 399         cxgb4_get_tcp_stats(c4iw_dev->rdev.lldi.pdev, &v4, &v6);
 400         stats->value[IP4INSEGS] = v4.tcp_in_segs;
 401         stats->value[IP4OUTSEGS] = v4.tcp_out_segs;
 402         stats->value[IP4RETRANSSEGS] = v4.tcp_retrans_segs;
 403         stats->value[IP4OUTRSTS] = v4.tcp_out_rsts;
 404         stats->value[IP6INSEGS] = v6.tcp_in_segs;
 405         stats->value[IP6OUTSEGS] = v6.tcp_out_segs;
 406         stats->value[IP6RETRANSSEGS] = v6.tcp_retrans_segs;
 407         stats->value[IP6OUTRSTS] = v6.tcp_out_rsts;
 408
 409         return stats->num_counters;
 410 }
 411
 412 static struct attribute *c4iw_class_attributes[] = {
 413         &dev_attr_hw_rev.attr,
 414         &dev_attr_hca_type.attr,
 415         &dev_attr_board_id.attr,
 416         NULL
 417 };
 418
 419 static const struct attribute_group c4iw_attr_group = {
 420         .attrs = c4iw_class_attributes,
 421 };
 422
 423 static int c4iw_port_immutable(struct ib_device *ibdev, u8 port_num,
 424                                struct ib_port_immutable *immutable)
 425 {
 426         struct ib_port_attr attr;
 427         int err;
 428
 429         immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
 430
 431         err = ib_query_port(ibdev, port_num, &attr);
 432         if (err)
 433                 return err;
 434
 435         immutable->gid_tbl_len = attr.gid_tbl_len;
 436
 437         return 0;
 438 }
 439
 440 static void get_dev_fw_str(struct ib_device *dev, char *str)
 441 {
 442         struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
 443                                                  ibdev);
 444         pr_debug("dev 0x%p\n", dev);
 445
 446         snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u.%u.%u",
 447                  FW_HDR_FW_VER_MAJOR_G(c4iw_dev->rdev.lldi.fw_vers),
 448                  FW_HDR_FW_VER_MINOR_G(c4iw_dev->rdev.lldi.fw_vers),
 449                  FW_HDR_FW_VER_MICRO_G(c4iw_dev->rdev.lldi.fw_vers),
 450                  FW_HDR_FW_VER_BUILD_G(c4iw_dev->rdev.lldi.fw_vers));
 451 }
 452
 453 static const struct ib_device_ops c4iw_dev_ops = {
 454         .owner = THIS_MODULE,
 455         .driver_id = RDMA_DRIVER_CXGB4,
 456         .uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION,
 457
 458         .alloc_hw_stats = c4iw_alloc_stats,
 459         .alloc_mr = c4iw_alloc_mr,
 460         .alloc_pd = c4iw_allocate_pd,
 461         .alloc_ucontext = c4iw_alloc_ucontext,
 462         .create_cq = c4iw_create_cq,
 463         .create_qp = c4iw_create_qp,
 464         .create_srq = c4iw_create_srq,
 465         .dealloc_pd = c4iw_deallocate_pd,
 466         .dealloc_ucontext = c4iw_dealloc_ucontext,
 467         .dereg_mr = c4iw_dereg_mr,
 468         .destroy_cq = c4iw_destroy_cq,
 469         .destroy_qp = c4iw_destroy_qp,
 470         .destroy_srq = c4iw_destroy_srq,
 471         .fill_res_cq_entry = c4iw_fill_res_cq_entry,
 472         .fill_res_cm_id_entry = c4iw_fill_res_cm_id_entry,
 473         .fill_res_mr_entry = c4iw_fill_res_mr_entry,
 474         .get_dev_fw_str = get_dev_fw_str,
 475         .get_dma_mr = c4iw_get_dma_mr,
 476         .get_hw_stats = c4iw_get_mib,
 477         .get_port_immutable = c4iw_port_immutable,
 478         .iw_accept = c4iw_accept_cr,
 479         .iw_add_ref = c4iw_qp_add_ref,
 480         .iw_connect = c4iw_connect,
 481         .iw_create_listen = c4iw_create_listen,
 482         .iw_destroy_listen = c4iw_destroy_listen,
 483         .iw_get_qp = c4iw_get_qp,
 484         .iw_reject = c4iw_reject_cr,
 485         .iw_rem_ref = c4iw_qp_rem_ref,
 486         .map_mr_sg = c4iw_map_mr_sg,
 487         .mmap = c4iw_mmap,
 488         .modify_qp = c4iw_ib_modify_qp,
 489         .modify_srq = c4iw_modify_srq,
 490         .poll_cq = c4iw_poll_cq,
 491         .post_recv = c4iw_post_receive,
 492         .post_send = c4iw_post_send,
 493         .post_srq_recv = c4iw_post_srq_recv,
 494         .query_device = c4iw_query_device,
 495         .query_gid = c4iw_query_gid,
 496         .query_port = c4iw_query_port,
 497         .query_qp = c4iw_ib_query_qp,
 498         .reg_user_mr = c4iw_reg_user_mr,
 499         .req_notify_cq = c4iw_arm_cq,
 500
 501         INIT_RDMA_OBJ_SIZE(ib_cq, c4iw_cq, ibcq),
 502         INIT_RDMA_OBJ_SIZE(ib_mw, c4iw_mw, ibmw),
 503         INIT_RDMA_OBJ_SIZE(ib_pd, c4iw_pd, ibpd),
 504         INIT_RDMA_OBJ_SIZE(ib_srq, c4iw_srq, ibsrq),
 505         INIT_RDMA_OBJ_SIZE(ib_ucontext, c4iw_ucontext, ibucontext),
 506 };
 507
 508 static int set_netdevs(struct ib_device *ib_dev, struct c4iw_rdev *rdev)
 509 {
 510         int ret;
 511         int i;
 512
 513         for (i = 0; i < rdev->lldi.nports; i++) {
 514                 ret = ib_device_set_netdev(ib_dev, rdev->lldi.ports[i],
 515                                            i + 1);
 516                 if (ret)
 517                         return ret;
 518         }
 519         return 0;
 520 }
 521
 522 void c4iw_register_device(struct work_struct *work)
 523 {
 524         int ret;
 525         struct uld_ctx *ctx = container_of(work, struct uld_ctx, reg_work);
 526         struct c4iw_dev *dev = ctx->dev;
 527
 528         pr_debug("c4iw_dev %p\n", dev);
 529         memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
 530         memcpy(&dev->ibdev.node_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
 531         dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
 532         if (fastreg_support)
 533                 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
 534         dev->ibdev.local_dma_lkey = 0;
 535         dev->ibdev.node_type = RDMA_NODE_RNIC;
 536         BUILD_BUG_ON(sizeof(C4IW_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
 537         memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
 538         dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
 539         dev->ibdev.num_comp_vectors =  dev->rdev.lldi.nciq;
 540         dev->ibdev.dev.parent = &dev->rdev.lldi.pdev->dev;
 541
 542         memcpy(dev->ibdev.iw_ifname, dev->rdev.lldi.ports[0]->name,
 543                sizeof(dev->ibdev.iw_ifname));
 544
 545         rdma_set_device_sysfs_group(&dev->ibdev, &c4iw_attr_group);
 546         ib_set_device_ops(&dev->ibdev, &c4iw_dev_ops);
 547         ret = set_netdevs(&dev->ibdev, &dev->rdev);
 548         if (ret)
 549                 goto err_dealloc_ctx;
 550         dma_set_max_seg_size(&dev->rdev.lldi.pdev->dev, UINT_MAX);
 551         ret = ib_register_device(&dev->ibdev, "cxgb4_%d",
 552                                  &dev->rdev.lldi.pdev->dev);
 553         if (ret)
 554                 goto err_dealloc_ctx;
 555         return;
 556
 557 err_dealloc_ctx:
 558         pr_err("%s - Failed registering iwarp device: %d\n",
 559                pci_name(ctx->lldi.pdev), ret);
 560         c4iw_dealloc(ctx);
 561         return;
 562 }
 563
 564 void c4iw_unregister_device(struct c4iw_dev *dev)
 565 {
 566         pr_debug("c4iw_dev %p\n", dev);
 567         ib_unregister_device(&dev->ibdev);
 568         return;
 569 }