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 <net/addrconf.h>
45 #include <linux/io.h>
46 
47 #include <asm/irq.h>
48 #include <asm/byteorder.h>
49 
50 #include <rdma/iw_cm.h>
51 #include <rdma/ib_verbs.h>
52 #include <rdma/ib_smi.h>
53 #include <rdma/ib_umem.h>
54 #include <rdma/ib_user_verbs.h>
55 
56 #include "iw_cxgb4.h"
57 
58 static int fastreg_support = 1;
59 module_param(fastreg_support, int, 0644);
60 MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default=1)");
61 
62 static void c4iw_dealloc_ucontext(struct ib_ucontext *context)
63 {
64 	struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
65 	struct c4iw_dev *rhp;
66 	struct c4iw_mm_entry *mm, *tmp;
67 
68 	pr_debug("context %p\n", context);
69 	rhp = to_c4iw_dev(ucontext->ibucontext.device);
70 
71 	list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
72 		kfree(mm);
73 	c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
74 }
75 
76 static int c4iw_alloc_ucontext(struct ib_ucontext *ucontext,
77 			       struct ib_udata *udata)
78 {
79 	struct ib_device *ibdev = ucontext->device;
80 	struct c4iw_ucontext *context = to_c4iw_ucontext(ucontext);
81 	struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
82 	struct c4iw_alloc_ucontext_resp uresp;
83 	int ret = 0;
84 	struct c4iw_mm_entry *mm = NULL;
85 
86 	pr_debug("ibdev %p\n", ibdev);
87 	c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
88 	INIT_LIST_HEAD(&context->mmaps);
89 	spin_lock_init(&context->mmap_lock);
90 
91 	if (udata->outlen < sizeof(uresp) - sizeof(uresp.reserved)) {
92 		pr_err_once("Warning - downlevel libcxgb4 (non-fatal), device status page disabled\n");
93 		rhp->rdev.flags |= T4_STATUS_PAGE_DISABLED;
94 	} else {
95 		mm = kmalloc(sizeof(*mm), GFP_KERNEL);
96 		if (!mm) {
97 			ret = -ENOMEM;
98 			goto err;
99 		}
100 
101 		uresp.status_page_size = PAGE_SIZE;
102 
103 		spin_lock(&context->mmap_lock);
104 		uresp.status_page_key = context->key;
105 		context->key += PAGE_SIZE;
106 		spin_unlock(&context->mmap_lock);
107 
108 		ret = ib_copy_to_udata(udata, &uresp,
109 				       sizeof(uresp) - sizeof(uresp.reserved));
110 		if (ret)
111 			goto err_mm;
112 
113 		mm->key = uresp.status_page_key;
114 		mm->addr = virt_to_phys(rhp->rdev.status_page);
115 		mm->len = PAGE_SIZE;
116 		insert_mmap(context, mm);
117 	}
118 	return 0;
119 err_mm:
120 	kfree(mm);
121 err:
122 	return ret;
123 }
124 
125 static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
126 {
127 	int len = vma->vm_end - vma->vm_start;
128 	u32 key = vma->vm_pgoff << PAGE_SHIFT;
129 	struct c4iw_rdev *rdev;
130 	int ret = 0;
131 	struct c4iw_mm_entry *mm;
132 	struct c4iw_ucontext *ucontext;
133 	u64 addr;
134 
135 	pr_debug("pgoff 0x%lx key 0x%x len %d\n", vma->vm_pgoff,
136 		 key, len);
137 
138 	if (vma->vm_start & (PAGE_SIZE-1))
139 		return -EINVAL;
140 
141 	rdev = &(to_c4iw_dev(context->device)->rdev);
142 	ucontext = to_c4iw_ucontext(context);
143 
144 	mm = remove_mmap(ucontext, key, len);
145 	if (!mm)
146 		return -EINVAL;
147 	addr = mm->addr;
148 	kfree(mm);
149 
150 	if ((addr >= pci_resource_start(rdev->lldi.pdev, 0)) &&
151 	    (addr < (pci_resource_start(rdev->lldi.pdev, 0) +
152 		    pci_resource_len(rdev->lldi.pdev, 0)))) {
153 
154 		/*
155 		 * MA_SYNC register...
156 		 */
157 		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
158 		ret = io_remap_pfn_range(vma, vma->vm_start,
159 					 addr >> PAGE_SHIFT,
160 					 len, vma->vm_page_prot);
161 	} else if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) &&
162 		   (addr < (pci_resource_start(rdev->lldi.pdev, 2) +
163 		    pci_resource_len(rdev->lldi.pdev, 2)))) {
164 
165 		/*
166 		 * Map user DB or OCQP memory...
167 		 */
168 		if (addr >= rdev->oc_mw_pa)
169 			vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
170 		else {
171 			if (!is_t4(rdev->lldi.adapter_type))
172 				vma->vm_page_prot =
173 					t4_pgprot_wc(vma->vm_page_prot);
174 			else
175 				vma->vm_page_prot =
176 					pgprot_noncached(vma->vm_page_prot);
177 		}
178 		ret = io_remap_pfn_range(vma, vma->vm_start,
179 					 addr >> PAGE_SHIFT,
180 					 len, vma->vm_page_prot);
181 	} else {
182 
183 		/*
184 		 * Map WQ or CQ contig dma memory...
185 		 */
186 		ret = remap_pfn_range(vma, vma->vm_start,
187 				      addr >> PAGE_SHIFT,
188 				      len, vma->vm_page_prot);
189 	}
190 
191 	return ret;
192 }
193 
194 static int c4iw_deallocate_pd(struct ib_pd *pd, struct ib_udata *udata)
195 {
196 	struct c4iw_dev *rhp;
197 	struct c4iw_pd *php;
198 
199 	php = to_c4iw_pd(pd);
200 	rhp = php->rhp;
201 	pr_debug("ibpd %p pdid 0x%x\n", pd, php->pdid);
202 	c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
203 	mutex_lock(&rhp->rdev.stats.lock);
204 	rhp->rdev.stats.pd.cur--;
205 	mutex_unlock(&rhp->rdev.stats.lock);
206 	return 0;
207 }
208 
209 static int c4iw_allocate_pd(struct ib_pd *pd, struct ib_udata *udata)
210 {
211 	struct c4iw_pd *php = to_c4iw_pd(pd);
212 	struct ib_device *ibdev = pd->device;
213 	u32 pdid;
214 	struct c4iw_dev *rhp;
215 
216 	pr_debug("ibdev %p\n", ibdev);
217 	rhp = (struct c4iw_dev *) ibdev;
218 	pdid =  c4iw_get_resource(&rhp->rdev.resource.pdid_table);
219 	if (!pdid)
220 		return -EINVAL;
221 
222 	php->pdid = pdid;
223 	php->rhp = rhp;
224 	if (udata) {
225 		struct c4iw_alloc_pd_resp uresp = {.pdid = php->pdid};
226 
227 		if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
228 			c4iw_deallocate_pd(&php->ibpd, udata);
229 			return -EFAULT;
230 		}
231 	}
232 	mutex_lock(&rhp->rdev.stats.lock);
233 	rhp->rdev.stats.pd.cur++;
234 	if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
235 		rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
236 	mutex_unlock(&rhp->rdev.stats.lock);
237 	pr_debug("pdid 0x%0x ptr 0x%p\n", pdid, php);
238 	return 0;
239 }
240 
241 static int c4iw_query_gid(struct ib_device *ibdev, u32 port, int index,
242 			  union ib_gid *gid)
243 {
244 	struct c4iw_dev *dev;
245 
246 	pr_debug("ibdev %p, port %u, index %d, gid %p\n",
247 		 ibdev, port, index, gid);
248 	if (!port)
249 		return -EINVAL;
250 	dev = to_c4iw_dev(ibdev);
251 	memset(&(gid->raw[0]), 0, sizeof(gid->raw));
252 	memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
253 	return 0;
254 }
255 
256 static int c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
257 			     struct ib_udata *uhw)
258 {
259 
260 	struct c4iw_dev *dev;
261 
262 	pr_debug("ibdev %p\n", ibdev);
263 
264 	if (uhw->inlen || uhw->outlen)
265 		return -EINVAL;
266 
267 	dev = to_c4iw_dev(ibdev);
268 	addrconf_addr_eui48((u8 *)&props->sys_image_guid,
269 			    dev->rdev.lldi.ports[0]->dev_addr);
270 	props->hw_ver = CHELSIO_CHIP_RELEASE(dev->rdev.lldi.adapter_type);
271 	props->fw_ver = dev->rdev.lldi.fw_vers;
272 	props->device_cap_flags = IB_DEVICE_MEM_WINDOW;
273 	props->kernel_cap_flags = IBK_LOCAL_DMA_LKEY;
274 	if (fastreg_support)
275 		props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
276 	props->page_size_cap = T4_PAGESIZE_MASK;
277 	props->vendor_id = (u32)dev->rdev.lldi.pdev->vendor;
278 	props->vendor_part_id = (u32)dev->rdev.lldi.pdev->device;
279 	props->max_mr_size = T4_MAX_MR_SIZE;
280 	props->max_qp = dev->rdev.lldi.vr->qp.size / 2;
281 	props->max_srq = dev->rdev.lldi.vr->srq.size;
282 	props->max_qp_wr = dev->rdev.hw_queue.t4_max_qp_depth;
283 	props->max_srq_wr = dev->rdev.hw_queue.t4_max_qp_depth;
284 	props->max_send_sge = min(T4_MAX_SEND_SGE, T4_MAX_WRITE_SGE);
285 	props->max_recv_sge = T4_MAX_RECV_SGE;
286 	props->max_srq_sge = T4_MAX_RECV_SGE;
287 	props->max_sge_rd = 1;
288 	props->max_res_rd_atom = dev->rdev.lldi.max_ird_adapter;
289 	props->max_qp_rd_atom = min(dev->rdev.lldi.max_ordird_qp,
290 				    c4iw_max_read_depth);
291 	props->max_qp_init_rd_atom = props->max_qp_rd_atom;
292 	props->max_cq = dev->rdev.lldi.vr->qp.size;
293 	props->max_cqe = dev->rdev.hw_queue.t4_max_cq_depth;
294 	props->max_mr = c4iw_num_stags(&dev->rdev);
295 	props->max_pd = T4_MAX_NUM_PD;
296 	props->local_ca_ack_delay = 0;
297 	props->max_fast_reg_page_list_len =
298 		t4_max_fr_depth(dev->rdev.lldi.ulptx_memwrite_dsgl && use_dsgl);
299 
300 	return 0;
301 }
302 
303 static int c4iw_query_port(struct ib_device *ibdev, u32 port,
304 			   struct ib_port_attr *props)
305 {
306 	int ret = 0;
307 	pr_debug("ibdev %p\n", ibdev);
308 	ret = ib_get_eth_speed(ibdev, port, &props->active_speed,
309 			       &props->active_width);
310 
311 	props->port_cap_flags =
312 	    IB_PORT_CM_SUP |
313 	    IB_PORT_SNMP_TUNNEL_SUP |
314 	    IB_PORT_REINIT_SUP |
315 	    IB_PORT_DEVICE_MGMT_SUP |
316 	    IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
317 	props->gid_tbl_len = 1;
318 	props->max_msg_sz = -1;
319 
320 	return ret;
321 }
322 
323 static ssize_t hw_rev_show(struct device *dev,
324 			   struct device_attribute *attr, char *buf)
325 {
326 	struct c4iw_dev *c4iw_dev =
327 			rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
328 
329 	pr_debug("dev 0x%p\n", dev);
330 	return sysfs_emit(
331 		buf, "%d\n",
332 		CHELSIO_CHIP_RELEASE(c4iw_dev->rdev.lldi.adapter_type));
333 }
334 static DEVICE_ATTR_RO(hw_rev);
335 
336 static ssize_t hca_type_show(struct device *dev,
337 			     struct device_attribute *attr, char *buf)
338 {
339 	struct c4iw_dev *c4iw_dev =
340 			rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
341 	struct ethtool_drvinfo info;
342 	struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];
343 
344 	pr_debug("dev 0x%p\n", dev);
345 	lldev->ethtool_ops->get_drvinfo(lldev, &info);
346 	return sysfs_emit(buf, "%s\n", info.driver);
347 }
348 static DEVICE_ATTR_RO(hca_type);
349 
350 static ssize_t board_id_show(struct device *dev, struct device_attribute *attr,
351 			     char *buf)
352 {
353 	struct c4iw_dev *c4iw_dev =
354 			rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
355 
356 	pr_debug("dev 0x%p\n", dev);
357 	return sysfs_emit(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
358 			  c4iw_dev->rdev.lldi.pdev->device);
359 }
360 static DEVICE_ATTR_RO(board_id);
361 
362 enum counters {
363 	IP4INSEGS,
364 	IP4OUTSEGS,
365 	IP4RETRANSSEGS,
366 	IP4OUTRSTS,
367 	IP6INSEGS,
368 	IP6OUTSEGS,
369 	IP6RETRANSSEGS,
370 	IP6OUTRSTS,
371 	NR_COUNTERS
372 };
373 
374 static const struct rdma_stat_desc cxgb4_descs[] = {
375 	[IP4INSEGS].name = "ip4InSegs",
376 	[IP4OUTSEGS].name = "ip4OutSegs",
377 	[IP4RETRANSSEGS].name = "ip4RetransSegs",
378 	[IP4OUTRSTS].name = "ip4OutRsts",
379 	[IP6INSEGS].name = "ip6InSegs",
380 	[IP6OUTSEGS].name = "ip6OutSegs",
381 	[IP6RETRANSSEGS].name = "ip6RetransSegs",
382 	[IP6OUTRSTS].name = "ip6OutRsts"
383 };
384 
385 static struct rdma_hw_stats *c4iw_alloc_device_stats(struct ib_device *ibdev)
386 {
387 	BUILD_BUG_ON(ARRAY_SIZE(cxgb4_descs) != NR_COUNTERS);
388 
389 	/* FIXME: these look like port stats */
390 	return rdma_alloc_hw_stats_struct(cxgb4_descs, NR_COUNTERS,
391 					  RDMA_HW_STATS_DEFAULT_LIFESPAN);
392 }
393 
394 static int c4iw_get_mib(struct ib_device *ibdev,
395 			struct rdma_hw_stats *stats,
396 			u32 port, int index)
397 {
398 	struct tp_tcp_stats v4, v6;
399 	struct c4iw_dev *c4iw_dev = to_c4iw_dev(ibdev);
400 
401 	cxgb4_get_tcp_stats(c4iw_dev->rdev.lldi.pdev, &v4, &v6);
402 	stats->value[IP4INSEGS] = v4.tcp_in_segs;
403 	stats->value[IP4OUTSEGS] = v4.tcp_out_segs;
404 	stats->value[IP4RETRANSSEGS] = v4.tcp_retrans_segs;
405 	stats->value[IP4OUTRSTS] = v4.tcp_out_rsts;
406 	stats->value[IP6INSEGS] = v6.tcp_in_segs;
407 	stats->value[IP6OUTSEGS] = v6.tcp_out_segs;
408 	stats->value[IP6RETRANSSEGS] = v6.tcp_retrans_segs;
409 	stats->value[IP6OUTRSTS] = v6.tcp_out_rsts;
410 
411 	return stats->num_counters;
412 }
413 
414 static struct attribute *c4iw_class_attributes[] = {
415 	&dev_attr_hw_rev.attr,
416 	&dev_attr_hca_type.attr,
417 	&dev_attr_board_id.attr,
418 	NULL
419 };
420 
421 static const struct attribute_group c4iw_attr_group = {
422 	.attrs = c4iw_class_attributes,
423 };
424 
425 static int c4iw_port_immutable(struct ib_device *ibdev, u32 port_num,
426 			       struct ib_port_immutable *immutable)
427 {
428 	struct ib_port_attr attr;
429 	int err;
430 
431 	immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
432 
433 	err = ib_query_port(ibdev, port_num, &attr);
434 	if (err)
435 		return err;
436 
437 	immutable->gid_tbl_len = attr.gid_tbl_len;
438 
439 	return 0;
440 }
441 
442 static void get_dev_fw_str(struct ib_device *dev, char *str)
443 {
444 	struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
445 						 ibdev);
446 	pr_debug("dev 0x%p\n", dev);
447 
448 	snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u.%u.%u",
449 		 FW_HDR_FW_VER_MAJOR_G(c4iw_dev->rdev.lldi.fw_vers),
450 		 FW_HDR_FW_VER_MINOR_G(c4iw_dev->rdev.lldi.fw_vers),
451 		 FW_HDR_FW_VER_MICRO_G(c4iw_dev->rdev.lldi.fw_vers),
452 		 FW_HDR_FW_VER_BUILD_G(c4iw_dev->rdev.lldi.fw_vers));
453 }
454 
455 static const struct ib_device_ops c4iw_dev_ops = {
456 	.owner = THIS_MODULE,
457 	.driver_id = RDMA_DRIVER_CXGB4,
458 	.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION,
459 
460 	.alloc_hw_device_stats = c4iw_alloc_device_stats,
461 	.alloc_mr = c4iw_alloc_mr,
462 	.alloc_pd = c4iw_allocate_pd,
463 	.alloc_ucontext = c4iw_alloc_ucontext,
464 	.create_cq = c4iw_create_cq,
465 	.create_qp = c4iw_create_qp,
466 	.create_srq = c4iw_create_srq,
467 	.dealloc_pd = c4iw_deallocate_pd,
468 	.dealloc_ucontext = c4iw_dealloc_ucontext,
469 	.dereg_mr = c4iw_dereg_mr,
470 	.destroy_cq = c4iw_destroy_cq,
471 	.destroy_qp = c4iw_destroy_qp,
472 	.destroy_srq = c4iw_destroy_srq,
473 	.device_group = &c4iw_attr_group,
474 	.fill_res_cq_entry = c4iw_fill_res_cq_entry,
475 	.fill_res_cm_id_entry = c4iw_fill_res_cm_id_entry,
476 	.fill_res_mr_entry = c4iw_fill_res_mr_entry,
477 	.get_dev_fw_str = get_dev_fw_str,
478 	.get_dma_mr = c4iw_get_dma_mr,
479 	.get_hw_stats = c4iw_get_mib,
480 	.get_port_immutable = c4iw_port_immutable,
481 	.iw_accept = c4iw_accept_cr,
482 	.iw_add_ref = c4iw_qp_add_ref,
483 	.iw_connect = c4iw_connect,
484 	.iw_create_listen = c4iw_create_listen,
485 	.iw_destroy_listen = c4iw_destroy_listen,
486 	.iw_get_qp = c4iw_get_qp,
487 	.iw_reject = c4iw_reject_cr,
488 	.iw_rem_ref = c4iw_qp_rem_ref,
489 	.map_mr_sg = c4iw_map_mr_sg,
490 	.mmap = c4iw_mmap,
491 	.modify_qp = c4iw_ib_modify_qp,
492 	.modify_srq = c4iw_modify_srq,
493 	.poll_cq = c4iw_poll_cq,
494 	.post_recv = c4iw_post_receive,
495 	.post_send = c4iw_post_send,
496 	.post_srq_recv = c4iw_post_srq_recv,
497 	.query_device = c4iw_query_device,
498 	.query_gid = c4iw_query_gid,
499 	.query_port = c4iw_query_port,
500 	.query_qp = c4iw_ib_query_qp,
501 	.reg_user_mr = c4iw_reg_user_mr,
502 	.req_notify_cq = c4iw_arm_cq,
503 
504 	INIT_RDMA_OBJ_SIZE(ib_cq, c4iw_cq, ibcq),
505 	INIT_RDMA_OBJ_SIZE(ib_mw, c4iw_mw, ibmw),
506 	INIT_RDMA_OBJ_SIZE(ib_pd, c4iw_pd, ibpd),
507 	INIT_RDMA_OBJ_SIZE(ib_qp, c4iw_qp, ibqp),
508 	INIT_RDMA_OBJ_SIZE(ib_srq, c4iw_srq, ibsrq),
509 	INIT_RDMA_OBJ_SIZE(ib_ucontext, c4iw_ucontext, ibucontext),
510 };
511 
512 static int set_netdevs(struct ib_device *ib_dev, struct c4iw_rdev *rdev)
513 {
514 	int ret;
515 	int i;
516 
517 	for (i = 0; i < rdev->lldi.nports; i++) {
518 		ret = ib_device_set_netdev(ib_dev, rdev->lldi.ports[i],
519 					   i + 1);
520 		if (ret)
521 			return ret;
522 	}
523 	return 0;
524 }
525 
526 void c4iw_register_device(struct work_struct *work)
527 {
528 	int ret;
529 	struct uld_ctx *ctx = container_of(work, struct uld_ctx, reg_work);
530 	struct c4iw_dev *dev = ctx->dev;
531 
532 	pr_debug("c4iw_dev %p\n", dev);
533 	addrconf_addr_eui48((u8 *)&dev->ibdev.node_guid,
534 			    dev->rdev.lldi.ports[0]->dev_addr);
535 	dev->ibdev.local_dma_lkey = 0;
536 	dev->ibdev.node_type = RDMA_NODE_RNIC;
537 	BUILD_BUG_ON(sizeof(C4IW_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
538 	memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
539 	dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
540 	dev->ibdev.num_comp_vectors =  dev->rdev.lldi.nciq;
541 	dev->ibdev.dev.parent = &dev->rdev.lldi.pdev->dev;
542 
543 	memcpy(dev->ibdev.iw_ifname, dev->rdev.lldi.ports[0]->name,
544 	       sizeof(dev->ibdev.iw_ifname));
545 
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 }
570