xref: /freebsd/sys/dev/cxgbe/iw_cxgbe/provider.c (revision d3d381b2b194b4d24853e92eecef55f262688d1a)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 2009-2013, 2016 Chelsio, Inc. All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * COPYING in the main directory of this source tree, or the
10  * OpenIB.org BSD license below:
11  *
12  *     Redistribution and use in source and binary forms, with or
13  *     without modification, are permitted provided that the following
14  *     conditions are met:
15  *
16  *      - Redistributions of source code must retain the above
17  *        copyright notice, this list of conditions and the following
18  *        disclaimer.
19  *
20  *      - Redistributions in binary form must reproduce the above
21  *        copyright notice, this list of conditions and the following
22  *        disclaimer in the documentation and/or other materials
23  *        provided with the distribution.
24  *
25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32  * SOFTWARE.
33  */
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
36 
37 #define	LINUXKPI_PARAM_PREFIX iw_cxgbe_
38 
39 #include "opt_inet.h"
40 
41 #ifdef TCP_OFFLOAD
42 #include <asm/pgtable.h>
43 #include <linux/page.h>
44 #include <rdma/ib_verbs.h>
45 #include <rdma/ib_user_verbs.h>
46 
47 #include "iw_cxgbe.h"
48 #include "user.h"
49 extern int use_dsgl;
50 static int fastreg_support = 1;
51 module_param(fastreg_support, int, 0644);
52 MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default = 1)");
53 
54 static int c4iw_modify_port(struct ib_device *ibdev,
55 			    u8 port, int port_modify_mask,
56 			    struct ib_port_modify *props)
57 {
58 	return -ENOSYS;
59 }
60 
61 static struct ib_ah *c4iw_ah_create(struct ib_pd *pd,
62 				    struct ib_ah_attr *ah_attr,
63 				    struct ib_udata *udata)
64 {
65 	return ERR_PTR(-ENOSYS);
66 }
67 
68 static int c4iw_ah_destroy(struct ib_ah *ah)
69 {
70 	return -ENOSYS;
71 }
72 
73 static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
74 {
75 	return -ENOSYS;
76 }
77 
78 static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
79 {
80 	return -ENOSYS;
81 }
82 
83 static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags,
84 		u8 port_num, const struct ib_wc *in_wc,
85 		const struct ib_grh *in_grh,
86 		const struct ib_mad_hdr *in_mad,
87 		size_t in_mad_size,
88 		struct ib_mad_hdr *out_mad,
89 		size_t *out_mad_size,
90 		u16 *out_mad_pkey_index)
91 
92 {
93 	return -ENOSYS;
94 }
95 
96 void _c4iw_free_ucontext(struct kref *kref)
97 {
98 	struct c4iw_ucontext *ucontext;
99 	struct c4iw_dev *rhp;
100 	struct c4iw_mm_entry *mm, *tmp;
101 
102 	ucontext = container_of(kref, struct c4iw_ucontext, kref);
103 	rhp = to_c4iw_dev(ucontext->ibucontext.device);
104 
105 	CTR2(KTR_IW_CXGBE, "%s ucontext %p", __func__, ucontext);
106 	list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
107 		kfree(mm);
108 	c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
109 	kfree(ucontext);
110 }
111 
112 static int c4iw_dealloc_ucontext(struct ib_ucontext *context)
113 {
114 	struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
115 
116 	CTR2(KTR_IW_CXGBE, "%s context %p", __func__, context);
117 	c4iw_put_ucontext(ucontext);
118 	return 0;
119 }
120 
121 static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev,
122 					       struct ib_udata *udata)
123 {
124 	struct c4iw_ucontext *context;
125 	struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
126 	static int warned;
127 	struct c4iw_alloc_ucontext_resp uresp;
128 	int ret = 0;
129 	struct c4iw_mm_entry *mm = NULL;
130 
131 	PDBG("%s ibdev %p\n", __func__, ibdev);
132 	context = kzalloc(sizeof(*context), GFP_KERNEL);
133 	if (!context) {
134 		ret = -ENOMEM;
135 		goto err;
136 	}
137 
138 	c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
139 	INIT_LIST_HEAD(&context->mmaps);
140 	spin_lock_init(&context->mmap_lock);
141 	kref_init(&context->kref);
142 
143 	if (udata->outlen < sizeof(uresp) - sizeof(uresp.reserved)) {
144 		if (!warned++)
145 			log(LOG_ERR, "%s Warning - downlevel libcxgb4 "
146 			       "(non-fatal), device status page disabled.\n",
147 			       __func__);
148 		rhp->rdev.flags |= T4_STATUS_PAGE_DISABLED;
149 	} else {
150 
151 		mm = kmalloc(sizeof *mm, GFP_KERNEL);
152 		if (!mm)
153 			goto err_free;
154 
155 		uresp.status_page_size = PAGE_SIZE;
156 
157 		spin_lock(&context->mmap_lock);
158 		uresp.status_page_key = context->key;
159 		context->key += PAGE_SIZE;
160 		spin_unlock(&context->mmap_lock);
161 
162 		ret = ib_copy_to_udata(udata, &uresp,
163 				       sizeof(uresp) - sizeof(uresp.reserved));
164 		if (ret)
165 			goto err_mm;
166 
167 		mm->key = uresp.status_page_key;
168 		mm->addr = vtophys(rhp->rdev.status_page);
169 		mm->len = PAGE_SIZE;
170 		insert_mmap(context, mm);
171 	}
172 	return &context->ibucontext;
173 err_mm:
174 	kfree(mm);
175 err_free:
176 	kfree(context);
177 err:
178 	return ERR_PTR(ret);
179 }
180 
181 static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
182 {
183 	int len = vma->vm_end - vma->vm_start;
184 	u32 key = vma->vm_pgoff << PAGE_SHIFT;
185 	struct c4iw_rdev *rdev;
186 	int ret = 0;
187 	struct c4iw_mm_entry *mm;
188 	struct c4iw_ucontext *ucontext;
189 	u64 addr = 0;
190 
191 	CTR4(KTR_IW_CXGBE, "%s:1 ctx %p vma %p, vm_start %u", __func__,
192 			context, vma, vma->vm_start);
193 
194 	CTR4(KTR_IW_CXGBE, "%s:1a pgoff 0x%lx key 0x%x len %d", __func__,
195 	    vma->vm_pgoff, key, len);
196 
197 	if (vma->vm_start & (PAGE_SIZE-1)) {
198 		CTR3(KTR_IW_CXGBE, "%s:2 unaligned vm_start %u vma %p",
199 		    __func__, vma->vm_start, vma);
200 		return -EINVAL;
201 	}
202 
203 	rdev = &(to_c4iw_dev(context->device)->rdev);
204 	ucontext = to_c4iw_ucontext(context);
205 
206 	mm = remove_mmap(ucontext, key, len);
207 	if (!mm) {
208 		CTR4(KTR_IW_CXGBE, "%s:3 ucontext %p key %u len %u", __func__,
209 		    ucontext, key, len);
210 		return -EINVAL;
211 	}
212 	addr = mm->addr;
213 	kfree(mm);
214 
215 	/* user DB-GTS registers if addr in udbs_res range,
216 	 * else WQ or CQ memory.
217 	 * */
218 	if (rdev->adap->iwt.wc_en && addr >= rdev->bar2_pa &&
219 			addr < rdev->bar2_pa + rdev->bar2_len)
220 		vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
221 
222 	ret = io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT,
223 			len, vma->vm_page_prot);
224 	CTR4(KTR_IW_CXGBE, "%s:4 ctx %p vma %p ret %u", __func__, context, vma,
225 	    ret);
226 	return ret;
227 }
228 
229 static int
230 c4iw_deallocate_pd(struct ib_pd *pd)
231 {
232 	struct c4iw_pd *php = to_c4iw_pd(pd);
233 	struct c4iw_dev *rhp = php->rhp;
234 
235 	CTR3(KTR_IW_CXGBE, "%s: pd %p, pdid 0x%x", __func__, pd, php->pdid);
236 
237 	c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
238 	mutex_lock(&rhp->rdev.stats.lock);
239 	rhp->rdev.stats.pd.cur--;
240 	mutex_unlock(&rhp->rdev.stats.lock);
241 	kfree(php);
242 
243 	return (0);
244 }
245 
246 static struct ib_pd *
247 c4iw_allocate_pd(struct ib_device *ibdev, struct ib_ucontext *context,
248     struct ib_udata *udata)
249 {
250 	struct c4iw_pd *php;
251 	u32 pdid;
252 	struct c4iw_dev *rhp;
253 
254 	CTR4(KTR_IW_CXGBE, "%s: ibdev %p, context %p, data %p", __func__, ibdev,
255 	    context, udata);
256 	rhp = (struct c4iw_dev *) ibdev;
257 	pdid =  c4iw_get_resource(&rhp->rdev.resource.pdid_table);
258 	if (!pdid)
259 		return ERR_PTR(-EINVAL);
260 	php = kzalloc(sizeof(*php), GFP_KERNEL);
261 	if (!php) {
262 		c4iw_put_resource(&rhp->rdev.resource.pdid_table, pdid);
263 		return ERR_PTR(-ENOMEM);
264 	}
265 	php->pdid = pdid;
266 	php->rhp = rhp;
267 	if (context) {
268 		if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
269 			c4iw_deallocate_pd(&php->ibpd);
270 			return ERR_PTR(-EFAULT);
271 		}
272 	}
273 	mutex_lock(&rhp->rdev.stats.lock);
274 	rhp->rdev.stats.pd.cur++;
275 	if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
276 		rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
277 	mutex_unlock(&rhp->rdev.stats.lock);
278 
279 	CTR6(KTR_IW_CXGBE,
280 	    "%s: ibdev %p, context %p, data %p, pddid 0x%x, pd %p", __func__,
281 	    ibdev, context, udata, pdid, php);
282 	return (&php->ibpd);
283 }
284 
285 static int
286 c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
287 {
288 
289 	CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, pkey %p", __func__,
290 	    ibdev, port, index, pkey);
291 
292 	*pkey = 0;
293 	return (0);
294 }
295 
296 static int
297 c4iw_query_gid(struct ib_device *ibdev, u8 port, int index, union ib_gid *gid)
298 {
299 	struct c4iw_dev *dev;
300 	struct port_info *pi;
301 	struct adapter *sc;
302 
303 	CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, gid %p", __func__,
304 	    ibdev, port, index, gid);
305 
306 	memset(&gid->raw[0], 0, sizeof(gid->raw));
307 	dev = to_c4iw_dev(ibdev);
308 	sc = dev->rdev.adap;
309 	if (port == 0 || port > sc->params.nports)
310 		return (-EINVAL);
311 	pi = sc->port[port - 1];
312 	memcpy(&gid->raw[0], pi->vi[0].hw_addr, ETHER_ADDR_LEN);
313 	return (0);
314 }
315 
316 static int
317 c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
318 		struct ib_udata *uhw)
319 {
320 	struct c4iw_dev *dev = to_c4iw_dev(ibdev);
321 	struct adapter *sc = dev->rdev.adap;
322 
323 	CTR3(KTR_IW_CXGBE, "%s ibdev %p, props %p", __func__, ibdev, props);
324 
325 	if (uhw->inlen || uhw->outlen)
326 		return -EINVAL;
327 
328 	memset(props, 0, sizeof *props);
329 	memcpy(&props->sys_image_guid, sc->port[0]->vi[0].hw_addr,
330 	    ETHER_ADDR_LEN);
331 	props->hw_ver = sc->params.chipid;
332 	props->fw_ver = sc->params.fw_vers;
333 	props->device_cap_flags = dev->device_cap_flags;
334 	props->page_size_cap = T4_PAGESIZE_MASK;
335 	props->vendor_id = pci_get_vendor(sc->dev);
336 	props->vendor_part_id = pci_get_device(sc->dev);
337 	props->max_mr_size = T4_MAX_MR_SIZE;
338 	props->max_qp = sc->vres.qp.size / 2;
339 	props->max_qp_wr = dev->rdev.hw_queue.t4_max_qp_depth;
340 	props->max_sge = T4_MAX_RECV_SGE;
341 	props->max_sge_rd = 1;
342 	props->max_res_rd_atom = sc->params.max_ird_adapter;
343 	props->max_qp_rd_atom = min(sc->params.max_ordird_qp,
344 	    c4iw_max_read_depth);
345 	props->max_qp_init_rd_atom = props->max_qp_rd_atom;
346 	props->max_cq = sc->vres.qp.size;
347 	props->max_cqe = dev->rdev.hw_queue.t4_max_cq_depth;
348 	props->max_mr = c4iw_num_stags(&dev->rdev);
349 	props->max_pd = T4_MAX_NUM_PD;
350 	props->local_ca_ack_delay = 0;
351 	props->max_fast_reg_page_list_len =
352 		t4_max_fr_depth(sc->params.ulptx_memwrite_dsgl && use_dsgl);
353 
354 	return (0);
355 }
356 
357 /*
358  * Returns -errno on failure.
359  */
360 static int
361 c4iw_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
362 {
363 	struct c4iw_dev *dev;
364 	struct adapter *sc;
365 	struct port_info *pi;
366 	struct ifnet *ifp;
367 
368 	CTR4(KTR_IW_CXGBE, "%s ibdev %p, port %d, props %p", __func__, ibdev,
369 	    port, props);
370 
371 	dev = to_c4iw_dev(ibdev);
372 	sc = dev->rdev.adap;
373 	if (port > sc->params.nports)
374 		return (-EINVAL);
375 	pi = sc->port[port - 1];
376 	ifp = pi->vi[0].ifp;
377 
378 	memset(props, 0, sizeof(struct ib_port_attr));
379 	props->max_mtu = IB_MTU_4096;
380 	if (ifp->if_mtu >= 4096)
381 		props->active_mtu = IB_MTU_4096;
382 	else if (ifp->if_mtu >= 2048)
383 		props->active_mtu = IB_MTU_2048;
384 	else if (ifp->if_mtu >= 1024)
385 		props->active_mtu = IB_MTU_1024;
386 	else if (ifp->if_mtu >= 512)
387 		props->active_mtu = IB_MTU_512;
388 	else
389 		props->active_mtu = IB_MTU_256;
390 	props->state = pi->link_cfg.link_ok ? IB_PORT_ACTIVE : IB_PORT_DOWN;
391 	props->port_cap_flags =
392 	    IB_PORT_CM_SUP |
393 	    IB_PORT_SNMP_TUNNEL_SUP |
394 	    IB_PORT_REINIT_SUP |
395 	    IB_PORT_DEVICE_MGMT_SUP |
396 	    IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
397 	props->gid_tbl_len = 1;
398 	props->pkey_tbl_len = 1;
399 	props->active_width = 2;
400 	props->active_speed = 2;
401 	props->max_msg_sz = -1;
402 
403 	return 0;
404 }
405 
406 static int c4iw_port_immutable(struct ib_device *ibdev, u8 port_num,
407 			       struct ib_port_immutable *immutable)
408 {
409 	struct ib_port_attr attr;
410 	int err;
411 
412 	immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
413 
414 	err = ib_query_port(ibdev, port_num, &attr);
415 	if (err)
416 		return err;
417 
418 	immutable->pkey_tbl_len = attr.pkey_tbl_len;
419 	immutable->gid_tbl_len = attr.gid_tbl_len;
420 
421 	return 0;
422 }
423 
424 /*
425  * Returns -errno on error.
426  */
427 int
428 c4iw_register_device(struct c4iw_dev *dev)
429 {
430 	struct adapter *sc = dev->rdev.adap;
431 	struct ib_device *ibdev = &dev->ibdev;
432 	struct iw_cm_verbs *iwcm;
433 	int ret;
434 
435 	CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev, sc);
436 	BUG_ON(!sc->port[0]);
437 	strlcpy(ibdev->name, device_get_nameunit(sc->dev), sizeof(ibdev->name));
438 	memset(&ibdev->node_guid, 0, sizeof(ibdev->node_guid));
439 	memcpy(&ibdev->node_guid, sc->port[0]->vi[0].hw_addr, ETHER_ADDR_LEN);
440 	ibdev->owner = THIS_MODULE;
441 	dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
442 	if (fastreg_support)
443 		dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
444 	ibdev->local_dma_lkey = 0;
445 	ibdev->uverbs_cmd_mask =
446 	    (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
447 	    (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
448 	    (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
449 	    (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
450 	    (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
451 	    (1ull << IB_USER_VERBS_CMD_REG_MR) |
452 	    (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
453 	    (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
454 	    (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
455 	    (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
456 	    (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
457 	    (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
458 	    (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
459 	    (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
460 	    (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
461 	    (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
462 	    (1ull << IB_USER_VERBS_CMD_POST_SEND) |
463 	    (1ull << IB_USER_VERBS_CMD_POST_RECV);
464 	ibdev->node_type = RDMA_NODE_RNIC;
465 	strlcpy(ibdev->node_desc, C4IW_NODE_DESC, sizeof(ibdev->node_desc));
466 	ibdev->phys_port_cnt = sc->params.nports;
467 	ibdev->num_comp_vectors = 1;
468 	ibdev->dma_device = NULL;
469 	ibdev->query_device = c4iw_query_device;
470 	ibdev->query_port = c4iw_query_port;
471 	ibdev->modify_port = c4iw_modify_port;
472 	ibdev->query_pkey = c4iw_query_pkey;
473 	ibdev->query_gid = c4iw_query_gid;
474 	ibdev->alloc_ucontext = c4iw_alloc_ucontext;
475 	ibdev->dealloc_ucontext = c4iw_dealloc_ucontext;
476 	ibdev->mmap = c4iw_mmap;
477 	ibdev->alloc_pd = c4iw_allocate_pd;
478 	ibdev->dealloc_pd = c4iw_deallocate_pd;
479 	ibdev->create_ah = c4iw_ah_create;
480 	ibdev->destroy_ah = c4iw_ah_destroy;
481 	ibdev->create_qp = c4iw_create_qp;
482 	ibdev->modify_qp = c4iw_ib_modify_qp;
483 	ibdev->query_qp = c4iw_ib_query_qp;
484 	ibdev->destroy_qp = c4iw_destroy_qp;
485 	ibdev->create_cq = c4iw_create_cq;
486 	ibdev->destroy_cq = c4iw_destroy_cq;
487 	ibdev->resize_cq = c4iw_resize_cq;
488 	ibdev->poll_cq = c4iw_poll_cq;
489 	ibdev->get_dma_mr = c4iw_get_dma_mr;
490 	ibdev->reg_user_mr = c4iw_reg_user_mr;
491 	ibdev->dereg_mr = c4iw_dereg_mr;
492 	ibdev->alloc_mw = c4iw_alloc_mw;
493 	ibdev->dealloc_mw = c4iw_dealloc_mw;
494 	ibdev->alloc_mr = c4iw_alloc_mr;
495 	ibdev->map_mr_sg = c4iw_map_mr_sg;
496 	ibdev->attach_mcast = c4iw_multicast_attach;
497 	ibdev->detach_mcast = c4iw_multicast_detach;
498 	ibdev->process_mad = c4iw_process_mad;
499 	ibdev->req_notify_cq = c4iw_arm_cq;
500 	ibdev->post_send = c4iw_post_send;
501 	ibdev->post_recv = c4iw_post_receive;
502 	ibdev->uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
503 	ibdev->get_port_immutable = c4iw_port_immutable;
504 
505 	iwcm = kmalloc(sizeof(*iwcm), GFP_KERNEL);
506 	if (iwcm == NULL)
507 		return (-ENOMEM);
508 
509 	iwcm->connect = c4iw_connect;
510 	iwcm->accept = c4iw_accept_cr;
511 	iwcm->reject = c4iw_reject_cr;
512 	iwcm->create_listen = c4iw_create_listen;
513 	iwcm->destroy_listen = c4iw_destroy_listen;
514 	iwcm->add_ref = c4iw_qp_add_ref;
515 	iwcm->rem_ref = c4iw_qp_rem_ref;
516 	iwcm->get_qp = c4iw_get_qp;
517 	ibdev->iwcm = iwcm;
518 
519 	ret = ib_register_device(&dev->ibdev, NULL);
520 	if (ret)
521 		kfree(iwcm);
522 
523 	return (ret);
524 }
525 
526 void
527 c4iw_unregister_device(struct c4iw_dev *dev)
528 {
529 
530 	CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev,
531 	    dev->rdev.adap);
532 	ib_unregister_device(&dev->ibdev);
533 	kfree(dev->ibdev.iwcm);
534 	return;
535 }
536 #endif
537