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[releases.git] / 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 <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 }