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 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 167 ret = io_remap_pfn_range(vma, vma->vm_start, 168 addr >> PAGE_SHIFT, 169 len, vma->vm_page_prot); 170 } else { 171 172 /* 173 * Map WQ or CQ contig dma memory... 174 */ 175 ret = remap_pfn_range(vma, vma->vm_start, 176 addr >> PAGE_SHIFT, 177 len, vma->vm_page_prot); 178 } 179 180 return ret; 181 } 182 183 static int c4iw_deallocate_pd(struct ib_pd *pd) 184 { 185 struct c4iw_dev *rhp; 186 struct c4iw_pd *php; 187 188 php = to_c4iw_pd(pd); 189 rhp = php->rhp; 190 PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid); 191 c4iw_put_resource(&rhp->rdev.resource.pdid_fifo, php->pdid, 192 &rhp->rdev.resource.pdid_fifo_lock); 193 kfree(php); 194 return 0; 195 } 196 197 static struct ib_pd *c4iw_allocate_pd(struct ib_device *ibdev, 198 struct ib_ucontext *context, 199 struct ib_udata *udata) 200 { 201 struct c4iw_pd *php; 202 u32 pdid; 203 struct c4iw_dev *rhp; 204 205 PDBG("%s ibdev %p\n", __func__, ibdev); 206 rhp = (struct c4iw_dev *) ibdev; 207 pdid = c4iw_get_resource(&rhp->rdev.resource.pdid_fifo, 208 &rhp->rdev.resource.pdid_fifo_lock); 209 if (!pdid) 210 return ERR_PTR(-EINVAL); 211 php = kzalloc(sizeof(*php), GFP_KERNEL); 212 if (!php) { 213 c4iw_put_resource(&rhp->rdev.resource.pdid_fifo, pdid, 214 &rhp->rdev.resource.pdid_fifo_lock); 215 return ERR_PTR(-ENOMEM); 216 } 217 php->pdid = pdid; 218 php->rhp = rhp; 219 if (context) { 220 if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) { 221 c4iw_deallocate_pd(&php->ibpd); 222 return ERR_PTR(-EFAULT); 223 } 224 } 225 PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php); 226 return &php->ibpd; 227 } 228 229 static int c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index, 230 u16 *pkey) 231 { 232 PDBG("%s ibdev %p\n", __func__, ibdev); 233 *pkey = 0; 234 return 0; 235 } 236 237 static int c4iw_query_gid(struct ib_device *ibdev, u8 port, int index, 238 union ib_gid *gid) 239 { 240 struct c4iw_dev *dev; 241 242 PDBG("%s ibdev %p, port %d, index %d, gid %p\n", 243 __func__, ibdev, port, index, gid); 244 dev = to_c4iw_dev(ibdev); 245 BUG_ON(port == 0); 246 memset(&(gid->raw[0]), 0, sizeof(gid->raw)); 247 memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6); 248 return 0; 249 } 250 251 static int c4iw_query_device(struct ib_device *ibdev, 252 struct ib_device_attr *props) 253 { 254 255 struct c4iw_dev *dev; 256 PDBG("%s ibdev %p\n", __func__, ibdev); 257 258 dev = to_c4iw_dev(ibdev); 259 memset(props, 0, sizeof *props); 260 memcpy(&props->sys_image_guid, dev->rdev.lldi.ports[0]->dev_addr, 6); 261 props->hw_ver = dev->rdev.lldi.adapter_type; 262 props->fw_ver = dev->rdev.lldi.fw_vers; 263 props->device_cap_flags = dev->device_cap_flags; 264 props->page_size_cap = T4_PAGESIZE_MASK; 265 props->vendor_id = (u32)dev->rdev.lldi.pdev->vendor; 266 props->vendor_part_id = (u32)dev->rdev.lldi.pdev->device; 267 props->max_mr_size = T4_MAX_MR_SIZE; 268 props->max_qp = T4_MAX_NUM_QP; 269 props->max_qp_wr = T4_MAX_QP_DEPTH; 270 props->max_sge = T4_MAX_RECV_SGE; 271 props->max_sge_rd = 1; 272 props->max_qp_rd_atom = c4iw_max_read_depth; 273 props->max_qp_init_rd_atom = c4iw_max_read_depth; 274 props->max_cq = T4_MAX_NUM_CQ; 275 props->max_cqe = T4_MAX_CQ_DEPTH; 276 props->max_mr = c4iw_num_stags(&dev->rdev); 277 props->max_pd = T4_MAX_NUM_PD; 278 props->local_ca_ack_delay = 0; 279 props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH; 280 281 return 0; 282 } 283 284 static int c4iw_query_port(struct ib_device *ibdev, u8 port, 285 struct ib_port_attr *props) 286 { 287 struct c4iw_dev *dev; 288 struct net_device *netdev; 289 struct in_device *inetdev; 290 291 PDBG("%s ibdev %p\n", __func__, ibdev); 292 293 dev = to_c4iw_dev(ibdev); 294 netdev = dev->rdev.lldi.ports[port-1]; 295 296 memset(props, 0, sizeof(struct ib_port_attr)); 297 props->max_mtu = IB_MTU_4096; 298 if (netdev->mtu >= 4096) 299 props->active_mtu = IB_MTU_4096; 300 else if (netdev->mtu >= 2048) 301 props->active_mtu = IB_MTU_2048; 302 else if (netdev->mtu >= 1024) 303 props->active_mtu = IB_MTU_1024; 304 else if (netdev->mtu >= 512) 305 props->active_mtu = IB_MTU_512; 306 else 307 props->active_mtu = IB_MTU_256; 308 309 if (!netif_carrier_ok(netdev)) 310 props->state = IB_PORT_DOWN; 311 else { 312 inetdev = in_dev_get(netdev); 313 if (inetdev) { 314 if (inetdev->ifa_list) 315 props->state = IB_PORT_ACTIVE; 316 else 317 props->state = IB_PORT_INIT; 318 in_dev_put(inetdev); 319 } else 320 props->state = IB_PORT_INIT; 321 } 322 323 props->port_cap_flags = 324 IB_PORT_CM_SUP | 325 IB_PORT_SNMP_TUNNEL_SUP | 326 IB_PORT_REINIT_SUP | 327 IB_PORT_DEVICE_MGMT_SUP | 328 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP; 329 props->gid_tbl_len = 1; 330 props->pkey_tbl_len = 1; 331 props->active_width = 2; 332 props->active_speed = 2; 333 props->max_msg_sz = -1; 334 335 return 0; 336 } 337 338 static ssize_t show_rev(struct device *dev, struct device_attribute *attr, 339 char *buf) 340 { 341 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev, 342 ibdev.dev); 343 PDBG("%s dev 0x%p\n", __func__, dev); 344 return sprintf(buf, "%d\n", c4iw_dev->rdev.lldi.adapter_type); 345 } 346 347 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr, 348 char *buf) 349 { 350 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev, 351 ibdev.dev); 352 PDBG("%s dev 0x%p\n", __func__, dev); 353 354 return sprintf(buf, "%u.%u.%u.%u\n", 355 FW_HDR_FW_VER_MAJOR_GET(c4iw_dev->rdev.lldi.fw_vers), 356 FW_HDR_FW_VER_MINOR_GET(c4iw_dev->rdev.lldi.fw_vers), 357 FW_HDR_FW_VER_MICRO_GET(c4iw_dev->rdev.lldi.fw_vers), 358 FW_HDR_FW_VER_BUILD_GET(c4iw_dev->rdev.lldi.fw_vers)); 359 } 360 361 static ssize_t show_hca(struct device *dev, struct device_attribute *attr, 362 char *buf) 363 { 364 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev, 365 ibdev.dev); 366 struct ethtool_drvinfo info; 367 struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0]; 368 369 PDBG("%s dev 0x%p\n", __func__, dev); 370 lldev->ethtool_ops->get_drvinfo(lldev, &info); 371 return sprintf(buf, "%s\n", info.driver); 372 } 373 374 static ssize_t show_board(struct device *dev, struct device_attribute *attr, 375 char *buf) 376 { 377 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev, 378 ibdev.dev); 379 PDBG("%s dev 0x%p\n", __func__, dev); 380 return sprintf(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor, 381 c4iw_dev->rdev.lldi.pdev->device); 382 } 383 384 static int c4iw_get_mib(struct ib_device *ibdev, 385 union rdma_protocol_stats *stats) 386 { 387 struct tp_tcp_stats v4, v6; 388 struct c4iw_dev *c4iw_dev = to_c4iw_dev(ibdev); 389 390 cxgb4_get_tcp_stats(c4iw_dev->rdev.lldi.pdev, &v4, &v6); 391 memset(stats, 0, sizeof *stats); 392 stats->iw.tcpInSegs = v4.tcpInSegs + v6.tcpInSegs; 393 stats->iw.tcpOutSegs = v4.tcpOutSegs + v6.tcpOutSegs; 394 stats->iw.tcpRetransSegs = v4.tcpRetransSegs + v6.tcpRetransSegs; 395 stats->iw.tcpOutRsts = v4.tcpOutRsts + v6.tcpOutSegs; 396 397 return 0; 398 } 399 400 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL); 401 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL); 402 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL); 403 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL); 404 405 static struct device_attribute *c4iw_class_attributes[] = { 406 &dev_attr_hw_rev, 407 &dev_attr_fw_ver, 408 &dev_attr_hca_type, 409 &dev_attr_board_id, 410 }; 411 412 int c4iw_register_device(struct c4iw_dev *dev) 413 { 414 int ret; 415 int i; 416 417 PDBG("%s c4iw_dev %p\n", __func__, dev); 418 BUG_ON(!dev->rdev.lldi.ports[0]); 419 strlcpy(dev->ibdev.name, "cxgb4_%d", IB_DEVICE_NAME_MAX); 420 memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid)); 421 memcpy(&dev->ibdev.node_guid, dev->rdev.lldi.ports[0]->dev_addr, 6); 422 dev->ibdev.owner = THIS_MODULE; 423 dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW; 424 if (fastreg_support) 425 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS; 426 dev->ibdev.local_dma_lkey = 0; 427 dev->ibdev.uverbs_cmd_mask = 428 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 429 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 430 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 431 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 432 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 433 (1ull << IB_USER_VERBS_CMD_REG_MR) | 434 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 435 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 436 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 437 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 438 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) | 439 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 440 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 441 (1ull << IB_USER_VERBS_CMD_POLL_CQ) | 442 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 443 (1ull << IB_USER_VERBS_CMD_POST_SEND) | 444 (1ull << IB_USER_VERBS_CMD_POST_RECV); 445 dev->ibdev.node_type = RDMA_NODE_RNIC; 446 memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC)); 447 dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports; 448 dev->ibdev.num_comp_vectors = 1; 449 dev->ibdev.dma_device = &(dev->rdev.lldi.pdev->dev); 450 dev->ibdev.query_device = c4iw_query_device; 451 dev->ibdev.query_port = c4iw_query_port; 452 dev->ibdev.query_pkey = c4iw_query_pkey; 453 dev->ibdev.query_gid = c4iw_query_gid; 454 dev->ibdev.alloc_ucontext = c4iw_alloc_ucontext; 455 dev->ibdev.dealloc_ucontext = c4iw_dealloc_ucontext; 456 dev->ibdev.mmap = c4iw_mmap; 457 dev->ibdev.alloc_pd = c4iw_allocate_pd; 458 dev->ibdev.dealloc_pd = c4iw_deallocate_pd; 459 dev->ibdev.create_ah = c4iw_ah_create; 460 dev->ibdev.destroy_ah = c4iw_ah_destroy; 461 dev->ibdev.create_qp = c4iw_create_qp; 462 dev->ibdev.modify_qp = c4iw_ib_modify_qp; 463 dev->ibdev.destroy_qp = c4iw_destroy_qp; 464 dev->ibdev.create_cq = c4iw_create_cq; 465 dev->ibdev.destroy_cq = c4iw_destroy_cq; 466 dev->ibdev.resize_cq = c4iw_resize_cq; 467 dev->ibdev.poll_cq = c4iw_poll_cq; 468 dev->ibdev.get_dma_mr = c4iw_get_dma_mr; 469 dev->ibdev.reg_phys_mr = c4iw_register_phys_mem; 470 dev->ibdev.rereg_phys_mr = c4iw_reregister_phys_mem; 471 dev->ibdev.reg_user_mr = c4iw_reg_user_mr; 472 dev->ibdev.dereg_mr = c4iw_dereg_mr; 473 dev->ibdev.alloc_mw = c4iw_alloc_mw; 474 dev->ibdev.bind_mw = c4iw_bind_mw; 475 dev->ibdev.dealloc_mw = c4iw_dealloc_mw; 476 dev->ibdev.alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr; 477 dev->ibdev.alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl; 478 dev->ibdev.free_fast_reg_page_list = c4iw_free_fastreg_pbl; 479 dev->ibdev.attach_mcast = c4iw_multicast_attach; 480 dev->ibdev.detach_mcast = c4iw_multicast_detach; 481 dev->ibdev.process_mad = c4iw_process_mad; 482 dev->ibdev.req_notify_cq = c4iw_arm_cq; 483 dev->ibdev.post_send = c4iw_post_send; 484 dev->ibdev.post_recv = c4iw_post_receive; 485 dev->ibdev.get_protocol_stats = c4iw_get_mib; 486 dev->ibdev.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION; 487 488 dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL); 489 if (!dev->ibdev.iwcm) 490 return -ENOMEM; 491 492 dev->ibdev.iwcm->connect = c4iw_connect; 493 dev->ibdev.iwcm->accept = c4iw_accept_cr; 494 dev->ibdev.iwcm->reject = c4iw_reject_cr; 495 dev->ibdev.iwcm->create_listen = c4iw_create_listen; 496 dev->ibdev.iwcm->destroy_listen = c4iw_destroy_listen; 497 dev->ibdev.iwcm->add_ref = c4iw_qp_add_ref; 498 dev->ibdev.iwcm->rem_ref = c4iw_qp_rem_ref; 499 dev->ibdev.iwcm->get_qp = c4iw_get_qp; 500 501 ret = ib_register_device(&dev->ibdev, NULL); 502 if (ret) 503 goto bail1; 504 505 for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i) { 506 ret = device_create_file(&dev->ibdev.dev, 507 c4iw_class_attributes[i]); 508 if (ret) 509 goto bail2; 510 } 511 return 0; 512 bail2: 513 ib_unregister_device(&dev->ibdev); 514 bail1: 515 kfree(dev->ibdev.iwcm); 516 return ret; 517 } 518 519 void c4iw_unregister_device(struct c4iw_dev *dev) 520 { 521 int i; 522 523 PDBG("%s c4iw_dev %p\n", __func__, dev); 524 for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i) 525 device_remove_file(&dev->ibdev.dev, 526 c4iw_class_attributes[i]); 527 ib_unregister_device(&dev->ibdev); 528 kfree(dev->ibdev.iwcm); 529 return; 530 } 531