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 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, 0)) &&
153 	    (addr < (pci_resource_start(rdev->lldi.pdev, 0) +
154 		    pci_resource_len(rdev->lldi.pdev, 0)))) {
155 
156 		/*
157 		 * MA_SYNC register...
158 		 */
159 		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
160 		ret = io_remap_pfn_range(vma, vma->vm_start,
161 					 addr >> PAGE_SHIFT,
162 					 len, vma->vm_page_prot);
163 	} else if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) &&
164 		   (addr < (pci_resource_start(rdev->lldi.pdev, 2) +
165 		    pci_resource_len(rdev->lldi.pdev, 2)))) {
166 
167 		/*
168 		 * Map user DB or OCQP memory...
169 		 */
170 		if (addr >= rdev->oc_mw_pa)
171 			vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
172 		else
173 			vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
174 		ret = io_remap_pfn_range(vma, vma->vm_start,
175 					 addr >> PAGE_SHIFT,
176 					 len, vma->vm_page_prot);
177 	} else {
178 
179 		/*
180 		 * Map WQ or CQ contig dma memory...
181 		 */
182 		ret = remap_pfn_range(vma, vma->vm_start,
183 				      addr >> PAGE_SHIFT,
184 				      len, vma->vm_page_prot);
185 	}
186 
187 	return ret;
188 }
189 
190 static int c4iw_deallocate_pd(struct ib_pd *pd)
191 {
192 	struct c4iw_dev *rhp;
193 	struct c4iw_pd *php;
194 
195 	php = to_c4iw_pd(pd);
196 	rhp = php->rhp;
197 	PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid);
198 	c4iw_put_resource(&rhp->rdev.resource.pdid_fifo, php->pdid,
199 			  &rhp->rdev.resource.pdid_fifo_lock);
200 	kfree(php);
201 	return 0;
202 }
203 
204 static struct ib_pd *c4iw_allocate_pd(struct ib_device *ibdev,
205 				      struct ib_ucontext *context,
206 				      struct ib_udata *udata)
207 {
208 	struct c4iw_pd *php;
209 	u32 pdid;
210 	struct c4iw_dev *rhp;
211 
212 	PDBG("%s ibdev %p\n", __func__, ibdev);
213 	rhp = (struct c4iw_dev *) ibdev;
214 	pdid =  c4iw_get_resource(&rhp->rdev.resource.pdid_fifo,
215 				  &rhp->rdev.resource.pdid_fifo_lock);
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_fifo, pdid,
221 				  &rhp->rdev.resource.pdid_fifo_lock);
222 		return ERR_PTR(-ENOMEM);
223 	}
224 	php->pdid = pdid;
225 	php->rhp = rhp;
226 	if (context) {
227 		if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
228 			c4iw_deallocate_pd(&php->ibpd);
229 			return ERR_PTR(-EFAULT);
230 		}
231 	}
232 	PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php);
233 	return &php->ibpd;
234 }
235 
236 static int c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
237 			   u16 *pkey)
238 {
239 	PDBG("%s ibdev %p\n", __func__, ibdev);
240 	*pkey = 0;
241 	return 0;
242 }
243 
244 static int c4iw_query_gid(struct ib_device *ibdev, u8 port, int index,
245 			  union ib_gid *gid)
246 {
247 	struct c4iw_dev *dev;
248 
249 	PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
250 	       __func__, ibdev, port, index, gid);
251 	dev = to_c4iw_dev(ibdev);
252 	BUG_ON(port == 0);
253 	memset(&(gid->raw[0]), 0, sizeof(gid->raw));
254 	memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
255 	return 0;
256 }
257 
258 static int c4iw_query_device(struct ib_device *ibdev,
259 			     struct ib_device_attr *props)
260 {
261 
262 	struct c4iw_dev *dev;
263 	PDBG("%s ibdev %p\n", __func__, ibdev);
264 
265 	dev = to_c4iw_dev(ibdev);
266 	memset(props, 0, sizeof *props);
267 	memcpy(&props->sys_image_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
268 	props->hw_ver = 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 = T4_MAX_NUM_QP;
276 	props->max_qp_wr = T4_MAX_QP_DEPTH;
277 	props->max_sge = T4_MAX_RECV_SGE;
278 	props->max_sge_rd = 1;
279 	props->max_qp_rd_atom = c4iw_max_read_depth;
280 	props->max_qp_init_rd_atom = c4iw_max_read_depth;
281 	props->max_cq = T4_MAX_NUM_CQ;
282 	props->max_cqe = T4_MAX_CQ_DEPTH;
283 	props->max_mr = c4iw_num_stags(&dev->rdev);
284 	props->max_pd = T4_MAX_NUM_PD;
285 	props->local_ca_ack_delay = 0;
286 	props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;
287 
288 	return 0;
289 }
290 
291 static int c4iw_query_port(struct ib_device *ibdev, u8 port,
292 			   struct ib_port_attr *props)
293 {
294 	struct c4iw_dev *dev;
295 	struct net_device *netdev;
296 	struct in_device *inetdev;
297 
298 	PDBG("%s ibdev %p\n", __func__, ibdev);
299 
300 	dev = to_c4iw_dev(ibdev);
301 	netdev = dev->rdev.lldi.ports[port-1];
302 
303 	memset(props, 0, sizeof(struct ib_port_attr));
304 	props->max_mtu = IB_MTU_4096;
305 	if (netdev->mtu >= 4096)
306 		props->active_mtu = IB_MTU_4096;
307 	else if (netdev->mtu >= 2048)
308 		props->active_mtu = IB_MTU_2048;
309 	else if (netdev->mtu >= 1024)
310 		props->active_mtu = IB_MTU_1024;
311 	else if (netdev->mtu >= 512)
312 		props->active_mtu = IB_MTU_512;
313 	else
314 		props->active_mtu = IB_MTU_256;
315 
316 	if (!netif_carrier_ok(netdev))
317 		props->state = IB_PORT_DOWN;
318 	else {
319 		inetdev = in_dev_get(netdev);
320 		if (inetdev) {
321 			if (inetdev->ifa_list)
322 				props->state = IB_PORT_ACTIVE;
323 			else
324 				props->state = IB_PORT_INIT;
325 			in_dev_put(inetdev);
326 		} else
327 			props->state = IB_PORT_INIT;
328 	}
329 
330 	props->port_cap_flags =
331 	    IB_PORT_CM_SUP |
332 	    IB_PORT_SNMP_TUNNEL_SUP |
333 	    IB_PORT_REINIT_SUP |
334 	    IB_PORT_DEVICE_MGMT_SUP |
335 	    IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
336 	props->gid_tbl_len = 1;
337 	props->pkey_tbl_len = 1;
338 	props->active_width = 2;
339 	props->active_speed = 2;
340 	props->max_msg_sz = -1;
341 
342 	return 0;
343 }
344 
345 static ssize_t show_rev(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 	return sprintf(buf, "%d\n", c4iw_dev->rdev.lldi.adapter_type);
352 }
353 
354 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
355 			   char *buf)
356 {
357 	struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
358 						 ibdev.dev);
359 	PDBG("%s dev 0x%p\n", __func__, dev);
360 
361 	return sprintf(buf, "%u.%u.%u.%u\n",
362 			FW_HDR_FW_VER_MAJOR_GET(c4iw_dev->rdev.lldi.fw_vers),
363 			FW_HDR_FW_VER_MINOR_GET(c4iw_dev->rdev.lldi.fw_vers),
364 			FW_HDR_FW_VER_MICRO_GET(c4iw_dev->rdev.lldi.fw_vers),
365 			FW_HDR_FW_VER_BUILD_GET(c4iw_dev->rdev.lldi.fw_vers));
366 }
367 
368 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
369 			char *buf)
370 {
371 	struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
372 						 ibdev.dev);
373 	struct ethtool_drvinfo info;
374 	struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];
375 
376 	PDBG("%s dev 0x%p\n", __func__, dev);
377 	lldev->ethtool_ops->get_drvinfo(lldev, &info);
378 	return sprintf(buf, "%s\n", info.driver);
379 }
380 
381 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
382 			  char *buf)
383 {
384 	struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
385 						 ibdev.dev);
386 	PDBG("%s dev 0x%p\n", __func__, dev);
387 	return sprintf(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
388 		       c4iw_dev->rdev.lldi.pdev->device);
389 }
390 
391 static int c4iw_get_mib(struct ib_device *ibdev,
392 			union rdma_protocol_stats *stats)
393 {
394 	struct tp_tcp_stats v4, v6;
395 	struct c4iw_dev *c4iw_dev = to_c4iw_dev(ibdev);
396 
397 	cxgb4_get_tcp_stats(c4iw_dev->rdev.lldi.pdev, &v4, &v6);
398 	memset(stats, 0, sizeof *stats);
399 	stats->iw.tcpInSegs = v4.tcpInSegs + v6.tcpInSegs;
400 	stats->iw.tcpOutSegs = v4.tcpOutSegs + v6.tcpOutSegs;
401 	stats->iw.tcpRetransSegs = v4.tcpRetransSegs + v6.tcpRetransSegs;
402 	stats->iw.tcpOutRsts = v4.tcpOutRsts + v6.tcpOutSegs;
403 
404 	return 0;
405 }
406 
407 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
408 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
409 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
410 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
411 
412 static struct device_attribute *c4iw_class_attributes[] = {
413 	&dev_attr_hw_rev,
414 	&dev_attr_fw_ver,
415 	&dev_attr_hca_type,
416 	&dev_attr_board_id,
417 };
418 
419 int c4iw_register_device(struct c4iw_dev *dev)
420 {
421 	int ret;
422 	int i;
423 
424 	PDBG("%s c4iw_dev %p\n", __func__, dev);
425 	BUG_ON(!dev->rdev.lldi.ports[0]);
426 	strlcpy(dev->ibdev.name, "cxgb4_%d", IB_DEVICE_NAME_MAX);
427 	memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
428 	memcpy(&dev->ibdev.node_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
429 	dev->ibdev.owner = THIS_MODULE;
430 	dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
431 	if (fastreg_support)
432 		dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
433 	dev->ibdev.local_dma_lkey = 0;
434 	dev->ibdev.uverbs_cmd_mask =
435 	    (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
436 	    (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
437 	    (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
438 	    (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
439 	    (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
440 	    (1ull << IB_USER_VERBS_CMD_REG_MR) |
441 	    (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
442 	    (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
443 	    (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
444 	    (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
445 	    (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
446 	    (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
447 	    (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
448 	    (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
449 	    (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
450 	    (1ull << IB_USER_VERBS_CMD_POST_SEND) |
451 	    (1ull << IB_USER_VERBS_CMD_POST_RECV);
452 	dev->ibdev.node_type = RDMA_NODE_RNIC;
453 	memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
454 	dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
455 	dev->ibdev.num_comp_vectors = 1;
456 	dev->ibdev.dma_device = &(dev->rdev.lldi.pdev->dev);
457 	dev->ibdev.query_device = c4iw_query_device;
458 	dev->ibdev.query_port = c4iw_query_port;
459 	dev->ibdev.modify_port = c4iw_modify_port;
460 	dev->ibdev.query_pkey = c4iw_query_pkey;
461 	dev->ibdev.query_gid = c4iw_query_gid;
462 	dev->ibdev.alloc_ucontext = c4iw_alloc_ucontext;
463 	dev->ibdev.dealloc_ucontext = c4iw_dealloc_ucontext;
464 	dev->ibdev.mmap = c4iw_mmap;
465 	dev->ibdev.alloc_pd = c4iw_allocate_pd;
466 	dev->ibdev.dealloc_pd = c4iw_deallocate_pd;
467 	dev->ibdev.create_ah = c4iw_ah_create;
468 	dev->ibdev.destroy_ah = c4iw_ah_destroy;
469 	dev->ibdev.create_qp = c4iw_create_qp;
470 	dev->ibdev.modify_qp = c4iw_ib_modify_qp;
471 	dev->ibdev.destroy_qp = c4iw_destroy_qp;
472 	dev->ibdev.create_cq = c4iw_create_cq;
473 	dev->ibdev.destroy_cq = c4iw_destroy_cq;
474 	dev->ibdev.resize_cq = c4iw_resize_cq;
475 	dev->ibdev.poll_cq = c4iw_poll_cq;
476 	dev->ibdev.get_dma_mr = c4iw_get_dma_mr;
477 	dev->ibdev.reg_phys_mr = c4iw_register_phys_mem;
478 	dev->ibdev.rereg_phys_mr = c4iw_reregister_phys_mem;
479 	dev->ibdev.reg_user_mr = c4iw_reg_user_mr;
480 	dev->ibdev.dereg_mr = c4iw_dereg_mr;
481 	dev->ibdev.alloc_mw = c4iw_alloc_mw;
482 	dev->ibdev.bind_mw = c4iw_bind_mw;
483 	dev->ibdev.dealloc_mw = c4iw_dealloc_mw;
484 	dev->ibdev.alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr;
485 	dev->ibdev.alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl;
486 	dev->ibdev.free_fast_reg_page_list = c4iw_free_fastreg_pbl;
487 	dev->ibdev.attach_mcast = c4iw_multicast_attach;
488 	dev->ibdev.detach_mcast = c4iw_multicast_detach;
489 	dev->ibdev.process_mad = c4iw_process_mad;
490 	dev->ibdev.req_notify_cq = c4iw_arm_cq;
491 	dev->ibdev.post_send = c4iw_post_send;
492 	dev->ibdev.post_recv = c4iw_post_receive;
493 	dev->ibdev.get_protocol_stats = c4iw_get_mib;
494 	dev->ibdev.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
495 
496 	dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
497 	if (!dev->ibdev.iwcm)
498 		return -ENOMEM;
499 
500 	dev->ibdev.iwcm->connect = c4iw_connect;
501 	dev->ibdev.iwcm->accept = c4iw_accept_cr;
502 	dev->ibdev.iwcm->reject = c4iw_reject_cr;
503 	dev->ibdev.iwcm->create_listen = c4iw_create_listen;
504 	dev->ibdev.iwcm->destroy_listen = c4iw_destroy_listen;
505 	dev->ibdev.iwcm->add_ref = c4iw_qp_add_ref;
506 	dev->ibdev.iwcm->rem_ref = c4iw_qp_rem_ref;
507 	dev->ibdev.iwcm->get_qp = c4iw_get_qp;
508 
509 	ret = ib_register_device(&dev->ibdev, NULL);
510 	if (ret)
511 		goto bail1;
512 
513 	for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i) {
514 		ret = device_create_file(&dev->ibdev.dev,
515 					 c4iw_class_attributes[i]);
516 		if (ret)
517 			goto bail2;
518 	}
519 	dev->registered = 1;
520 	return 0;
521 bail2:
522 	ib_unregister_device(&dev->ibdev);
523 bail1:
524 	kfree(dev->ibdev.iwcm);
525 	return ret;
526 }
527 
528 void c4iw_unregister_device(struct c4iw_dev *dev)
529 {
530 	int i;
531 
532 	PDBG("%s c4iw_dev %p\n", __func__, dev);
533 	for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i)
534 		device_remove_file(&dev->ibdev.dev,
535 				   c4iw_class_attributes[i]);
536 	ib_unregister_device(&dev->ibdev);
537 	kfree(dev->ibdev.iwcm);
538 	dev->registered = 0;
539 	return;
540 }
541