RDMA/cxgb3: Add driver for Chelsio T3 RNIC
[linux-2.6.git] / drivers / infiniband / hw / cxgb3 / iwch_provider.c
1 /*
2  * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
3  * Copyright (c) 2006 Open Grid Computing, Inc. All rights reserved.
4  *
5  * This software is available to you under a choice of one of two
6  * licenses.  You may choose to be licensed under the terms of the GNU
7  * General Public License (GPL) Version 2, available from the file
8  * COPYING in the main directory of this source tree, or the
9  * OpenIB.org BSD license below:
10  *
11  *     Redistribution and use in source and binary forms, with or
12  *     without modification, are permitted provided that the following
13  *     conditions are met:
14  *
15  *      - Redistributions of source code must retain the above
16  *        copyright notice, this list of conditions and the following
17  *        disclaimer.
18  *
19  *      - Redistributions in binary form must reproduce the above
20  *        copyright notice, this list of conditions and the following
21  *        disclaimer in the documentation and/or other materials
22  *        provided with the distribution.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31  * SOFTWARE.
32  */
33 #include <linux/module.h>
34 #include <linux/moduleparam.h>
35 #include <linux/device.h>
36 #include <linux/netdevice.h>
37 #include <linux/etherdevice.h>
38 #include <linux/delay.h>
39 #include <linux/errno.h>
40 #include <linux/list.h>
41 #include <linux/spinlock.h>
42 #include <linux/ethtool.h>
43
44 #include <asm/io.h>
45 #include <asm/irq.h>
46 #include <asm/byteorder.h>
47
48 #include <rdma/iw_cm.h>
49 #include <rdma/ib_verbs.h>
50 #include <rdma/ib_smi.h>
51 #include <rdma/ib_user_verbs.h>
52
53 #include "cxio_hal.h"
54 #include "iwch.h"
55 #include "iwch_provider.h"
56 #include "iwch_cm.h"
57 #include "iwch_user.h"
58
59 static int iwch_modify_port(struct ib_device *ibdev,
60                             u8 port, int port_modify_mask,
61                             struct ib_port_modify *props)
62 {
63         return -ENOSYS;
64 }
65
66 static struct ib_ah *iwch_ah_create(struct ib_pd *pd,
67                                     struct ib_ah_attr *ah_attr)
68 {
69         return ERR_PTR(-ENOSYS);
70 }
71
72 static int iwch_ah_destroy(struct ib_ah *ah)
73 {
74         return -ENOSYS;
75 }
76
77 static int iwch_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
78 {
79         return -ENOSYS;
80 }
81
82 static int iwch_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
83 {
84         return -ENOSYS;
85 }
86
87 static int iwch_process_mad(struct ib_device *ibdev,
88                             int mad_flags,
89                             u8 port_num,
90                             struct ib_wc *in_wc,
91                             struct ib_grh *in_grh,
92                             struct ib_mad *in_mad, struct ib_mad *out_mad)
93 {
94         return -ENOSYS;
95 }
96
97 static int iwch_dealloc_ucontext(struct ib_ucontext *context)
98 {
99         struct iwch_dev *rhp = to_iwch_dev(context->device);
100         struct iwch_ucontext *ucontext = to_iwch_ucontext(context);
101         struct iwch_mm_entry *mm, *tmp;
102
103         PDBG("%s context %p\n", __FUNCTION__, context);
104         list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
105                 kfree(mm);
106         cxio_release_ucontext(&rhp->rdev, &ucontext->uctx);
107         kfree(ucontext);
108         return 0;
109 }
110
111 static struct ib_ucontext *iwch_alloc_ucontext(struct ib_device *ibdev,
112                                         struct ib_udata *udata)
113 {
114         struct iwch_ucontext *context;
115         struct iwch_dev *rhp = to_iwch_dev(ibdev);
116
117         PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
118         context = kzalloc(sizeof(*context), GFP_KERNEL);
119         if (!context)
120                 return ERR_PTR(-ENOMEM);
121         cxio_init_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 iwch_destroy_cq(struct ib_cq *ib_cq)
128 {
129         struct iwch_cq *chp;
130
131         PDBG("%s ib_cq %p\n", __FUNCTION__, ib_cq);
132         chp = to_iwch_cq(ib_cq);
133
134         remove_handle(chp->rhp, &chp->rhp->cqidr, chp->cq.cqid);
135         atomic_dec(&chp->refcnt);
136         wait_event(chp->wait, !atomic_read(&chp->refcnt));
137
138         cxio_destroy_cq(&chp->rhp->rdev, &chp->cq);
139         kfree(chp);
140         return 0;
141 }
142
143 static struct ib_cq *iwch_create_cq(struct ib_device *ibdev, int entries,
144                              struct ib_ucontext *ib_context,
145                              struct ib_udata *udata)
146 {
147         struct iwch_dev *rhp;
148         struct iwch_cq *chp;
149         struct iwch_create_cq_resp uresp;
150         struct iwch_create_cq_req ureq;
151         struct iwch_ucontext *ucontext = NULL;
152
153         PDBG("%s ib_dev %p entries %d\n", __FUNCTION__, ibdev, entries);
154         rhp = to_iwch_dev(ibdev);
155         chp = kzalloc(sizeof(*chp), GFP_KERNEL);
156         if (!chp)
157                 return ERR_PTR(-ENOMEM);
158
159         if (ib_context) {
160                 ucontext = to_iwch_ucontext(ib_context);
161                 if (!t3a_device(rhp)) {
162                         if (ib_copy_from_udata(&ureq, udata, sizeof (ureq))) {
163                                 kfree(chp);
164                                 return ERR_PTR(-EFAULT);
165                         }
166                         chp->user_rptr_addr = (u32 __user *)(unsigned long)ureq.user_rptr_addr;
167                 }
168         }
169
170         if (t3a_device(rhp)) {
171
172                 /*
173                  * T3A: Add some fluff to handle extra CQEs inserted
174                  * for various errors.
175                  * Additional CQE possibilities:
176                  *      TERMINATE,
177                  *      incoming RDMA WRITE Failures
178                  *      incoming RDMA READ REQUEST FAILUREs
179                  * NOTE: We cannot ensure the CQ won't overflow.
180                  */
181                 entries += 16;
182         }
183         entries = roundup_pow_of_two(entries);
184         chp->cq.size_log2 = ilog2(entries);
185
186         if (cxio_create_cq(&rhp->rdev, &chp->cq)) {
187                 kfree(chp);
188                 return ERR_PTR(-ENOMEM);
189         }
190         chp->rhp = rhp;
191         chp->ibcq.cqe = (1 << chp->cq.size_log2) - 1;
192         spin_lock_init(&chp->lock);
193         atomic_set(&chp->refcnt, 1);
194         init_waitqueue_head(&chp->wait);
195         insert_handle(rhp, &rhp->cqidr, chp, chp->cq.cqid);
196
197         if (ucontext) {
198                 struct iwch_mm_entry *mm;
199
200                 mm = kmalloc(sizeof *mm, GFP_KERNEL);
201                 if (!mm) {
202                         iwch_destroy_cq(&chp->ibcq);
203                         return ERR_PTR(-ENOMEM);
204                 }
205                 uresp.cqid = chp->cq.cqid;
206                 uresp.size_log2 = chp->cq.size_log2;
207                 spin_lock(&ucontext->mmap_lock);
208                 uresp.key = ucontext->key;
209                 ucontext->key += PAGE_SIZE;
210                 spin_unlock(&ucontext->mmap_lock);
211                 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
212                         kfree(mm);
213                         iwch_destroy_cq(&chp->ibcq);
214                         return ERR_PTR(-EFAULT);
215                 }
216                 mm->key = uresp.key;
217                 mm->addr = virt_to_phys(chp->cq.queue);
218                 mm->len = PAGE_ALIGN((1UL << uresp.size_log2) *
219                                              sizeof (struct t3_cqe));
220                 insert_mmap(ucontext, mm);
221         }
222         PDBG("created cqid 0x%0x chp %p size 0x%0x, dma_addr 0x%0llx\n",
223              chp->cq.cqid, chp, (1 << chp->cq.size_log2),
224              (unsigned long long) chp->cq.dma_addr);
225         return &chp->ibcq;
226 }
227
228 static int iwch_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata)
229 {
230 #ifdef notyet
231         struct iwch_cq *chp = to_iwch_cq(cq);
232         struct t3_cq oldcq, newcq;
233         int ret;
234
235         PDBG("%s ib_cq %p cqe %d\n", __FUNCTION__, cq, cqe);
236
237         /* We don't downsize... */
238         if (cqe <= cq->cqe)
239                 return 0;
240
241         /* create new t3_cq with new size */
242         cqe = roundup_pow_of_two(cqe+1);
243         newcq.size_log2 = ilog2(cqe);
244
245         /* Dont allow resize to less than the current wce count */
246         if (cqe < Q_COUNT(chp->cq.rptr, chp->cq.wptr)) {
247                 return -ENOMEM;
248         }
249
250         /* Quiesce all QPs using this CQ */
251         ret = iwch_quiesce_qps(chp);
252         if (ret) {
253                 return ret;
254         }
255
256         ret = cxio_create_cq(&chp->rhp->rdev, &newcq);
257         if (ret) {
258                 return ret;
259         }
260
261         /* copy CQEs */
262         memcpy(newcq.queue, chp->cq.queue, (1 << chp->cq.size_log2) *
263                                         sizeof(struct t3_cqe));
264
265         /* old iwch_qp gets new t3_cq but keeps old cqid */
266         oldcq = chp->cq;
267         chp->cq = newcq;
268         chp->cq.cqid = oldcq.cqid;
269
270         /* resize new t3_cq to update the HW context */
271         ret = cxio_resize_cq(&chp->rhp->rdev, &chp->cq);
272         if (ret) {
273                 chp->cq = oldcq;
274                 return ret;
275         }
276         chp->ibcq.cqe = (1<<chp->cq.size_log2) - 1;
277
278         /* destroy old t3_cq */
279         oldcq.cqid = newcq.cqid;
280         ret = cxio_destroy_cq(&chp->rhp->rdev, &oldcq);
281         if (ret) {
282                 printk(KERN_ERR MOD "%s - cxio_destroy_cq failed %d\n",
283                         __FUNCTION__, ret);
284         }
285
286         /* add user hooks here */
287
288         /* resume qps */
289         ret = iwch_resume_qps(chp);
290         return ret;
291 #else
292         return -ENOSYS;
293 #endif
294 }
295
296 static int iwch_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify notify)
297 {
298         struct iwch_dev *rhp;
299         struct iwch_cq *chp;
300         enum t3_cq_opcode cq_op;
301         int err;
302         unsigned long flag;
303         u32 rptr;
304
305         chp = to_iwch_cq(ibcq);
306         rhp = chp->rhp;
307         if (notify == IB_CQ_SOLICITED)
308                 cq_op = CQ_ARM_SE;
309         else
310                 cq_op = CQ_ARM_AN;
311         if (chp->user_rptr_addr) {
312                 if (get_user(rptr, chp->user_rptr_addr))
313                         return -EFAULT;
314                 spin_lock_irqsave(&chp->lock, flag);
315                 chp->cq.rptr = rptr;
316         } else
317                 spin_lock_irqsave(&chp->lock, flag);
318         PDBG("%s rptr 0x%x\n", __FUNCTION__, chp->cq.rptr);
319         err = cxio_hal_cq_op(&rhp->rdev, &chp->cq, cq_op, 0);
320         spin_unlock_irqrestore(&chp->lock, flag);
321         if (err)
322                 printk(KERN_ERR MOD "Error %d rearming CQID 0x%x\n", err,
323                        chp->cq.cqid);
324         return err;
325 }
326
327 static int iwch_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
328 {
329         int len = vma->vm_end - vma->vm_start;
330         u32 key = vma->vm_pgoff << PAGE_SHIFT;
331         struct cxio_rdev *rdev_p;
332         int ret = 0;
333         struct iwch_mm_entry *mm;
334         struct iwch_ucontext *ucontext;
335
336         PDBG("%s pgoff 0x%lx key 0x%x len %d\n", __FUNCTION__, vma->vm_pgoff,
337              key, len);
338
339         if (vma->vm_start & (PAGE_SIZE-1)) {
340                 return -EINVAL;
341         }
342
343         rdev_p = &(to_iwch_dev(context->device)->rdev);
344         ucontext = to_iwch_ucontext(context);
345
346         mm = remove_mmap(ucontext, key, len);
347         if (!mm)
348                 return -EINVAL;
349         kfree(mm);
350
351         if ((mm->addr >= rdev_p->rnic_info.udbell_physbase) &&
352             (mm->addr < (rdev_p->rnic_info.udbell_physbase +
353                        rdev_p->rnic_info.udbell_len))) {
354
355                 /*
356                  * Map T3 DB register.
357                  */
358                 if (vma->vm_flags & VM_READ) {
359                         return -EPERM;
360                 }
361
362                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
363                 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
364                 vma->vm_flags &= ~VM_MAYREAD;
365                 ret = io_remap_pfn_range(vma, vma->vm_start,
366                                          mm->addr >> PAGE_SHIFT,
367                                          len, vma->vm_page_prot);
368         } else {
369
370                 /*
371                  * Map WQ or CQ contig dma memory...
372                  */
373                 ret = remap_pfn_range(vma, vma->vm_start,
374                                       mm->addr >> PAGE_SHIFT,
375                                       len, vma->vm_page_prot);
376         }
377
378         return ret;
379 }
380
381 static int iwch_deallocate_pd(struct ib_pd *pd)
382 {
383         struct iwch_dev *rhp;
384         struct iwch_pd *php;
385
386         php = to_iwch_pd(pd);
387         rhp = php->rhp;
388         PDBG("%s ibpd %p pdid 0x%x\n", __FUNCTION__, pd, php->pdid);
389         cxio_hal_put_pdid(rhp->rdev.rscp, php->pdid);
390         kfree(php);
391         return 0;
392 }
393
394 static struct ib_pd *iwch_allocate_pd(struct ib_device *ibdev,
395                                struct ib_ucontext *context,
396                                struct ib_udata *udata)
397 {
398         struct iwch_pd *php;
399         u32 pdid;
400         struct iwch_dev *rhp;
401
402         PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
403         rhp = (struct iwch_dev *) ibdev;
404         pdid = cxio_hal_get_pdid(rhp->rdev.rscp);
405         if (!pdid)
406                 return ERR_PTR(-EINVAL);
407         php = kzalloc(sizeof(*php), GFP_KERNEL);
408         if (!php) {
409                 cxio_hal_put_pdid(rhp->rdev.rscp, pdid);
410                 return ERR_PTR(-ENOMEM);
411         }
412         php->pdid = pdid;
413         php->rhp = rhp;
414         if (context) {
415                 if (ib_copy_to_udata(udata, &php->pdid, sizeof (__u32))) {
416                         iwch_deallocate_pd(&php->ibpd);
417                         return ERR_PTR(-EFAULT);
418                 }
419         }
420         PDBG("%s pdid 0x%0x ptr 0x%p\n", __FUNCTION__, pdid, php);
421         return &php->ibpd;
422 }
423
424 static int iwch_dereg_mr(struct ib_mr *ib_mr)
425 {
426         struct iwch_dev *rhp;
427         struct iwch_mr *mhp;
428         u32 mmid;
429
430         PDBG("%s ib_mr %p\n", __FUNCTION__, ib_mr);
431         /* There can be no memory windows */
432         if (atomic_read(&ib_mr->usecnt))
433                 return -EINVAL;
434
435         mhp = to_iwch_mr(ib_mr);
436         rhp = mhp->rhp;
437         mmid = mhp->attr.stag >> 8;
438         cxio_dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
439                        mhp->attr.pbl_addr);
440         remove_handle(rhp, &rhp->mmidr, mmid);
441         if (mhp->kva)
442                 kfree((void *) (unsigned long) mhp->kva);
443         PDBG("%s mmid 0x%x ptr %p\n", __FUNCTION__, mmid, mhp);
444         kfree(mhp);
445         return 0;
446 }
447
448 static struct ib_mr *iwch_register_phys_mem(struct ib_pd *pd,
449                                         struct ib_phys_buf *buffer_list,
450                                         int num_phys_buf,
451                                         int acc,
452                                         u64 *iova_start)
453 {
454         __be64 *page_list;
455         int shift;
456         u64 total_size;
457         int npages;
458         struct iwch_dev *rhp;
459         struct iwch_pd *php;
460         struct iwch_mr *mhp;
461         int ret;
462
463         PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
464         php = to_iwch_pd(pd);
465         rhp = php->rhp;
466
467         acc = iwch_convert_access(acc);
468
469
470         mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
471         if (!mhp)
472                 return ERR_PTR(-ENOMEM);
473
474         /* First check that we have enough alignment */
475         if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK)) {
476                 ret = -EINVAL;
477                 goto err;
478         }
479
480         if (num_phys_buf > 1 &&
481             ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK)) {
482                 ret = -EINVAL;
483                 goto err;
484         }
485
486         ret = build_phys_page_list(buffer_list, num_phys_buf, iova_start,
487                                    &total_size, &npages, &shift, &page_list);
488         if (ret)
489                 goto err;
490
491         mhp->rhp = rhp;
492         mhp->attr.pdid = php->pdid;
493         mhp->attr.zbva = 0;
494
495         /* NOTE: TPT perms are backwards from BIND WR perms! */
496         mhp->attr.perms = (acc & 0x1) << 3;
497         mhp->attr.perms |= (acc & 0x2) << 1;
498         mhp->attr.perms |= (acc & 0x4) >> 1;
499         mhp->attr.perms |= (acc & 0x8) >> 3;
500
501         mhp->attr.va_fbo = *iova_start;
502         mhp->attr.page_size = shift - 12;
503
504         mhp->attr.len = (u32) total_size;
505         mhp->attr.pbl_size = npages;
506         ret = iwch_register_mem(rhp, php, mhp, shift, page_list);
507         kfree(page_list);
508         if (ret) {
509                 goto err;
510         }
511         return &mhp->ibmr;
512 err:
513         kfree(mhp);
514         return ERR_PTR(ret);
515
516 }
517
518 static int iwch_reregister_phys_mem(struct ib_mr *mr,
519                                      int mr_rereg_mask,
520                                      struct ib_pd *pd,
521                                      struct ib_phys_buf *buffer_list,
522                                      int num_phys_buf,
523                                      int acc, u64 * iova_start)
524 {
525
526         struct iwch_mr mh, *mhp;
527         struct iwch_pd *php;
528         struct iwch_dev *rhp;
529         int new_acc;
530         __be64 *page_list = NULL;
531         int shift = 0;
532         u64 total_size;
533         int npages;
534         int ret;
535
536         PDBG("%s ib_mr %p ib_pd %p\n", __FUNCTION__, mr, pd);
537
538         /* There can be no memory windows */
539         if (atomic_read(&mr->usecnt))
540                 return -EINVAL;
541
542         mhp = to_iwch_mr(mr);
543         rhp = mhp->rhp;
544         php = to_iwch_pd(mr->pd);
545
546         /* make sure we are on the same adapter */
547         if (rhp != php->rhp)
548                 return -EINVAL;
549
550         new_acc = mhp->attr.perms;
551
552         memcpy(&mh, mhp, sizeof *mhp);
553
554         if (mr_rereg_mask & IB_MR_REREG_PD)
555                 php = to_iwch_pd(pd);
556         if (mr_rereg_mask & IB_MR_REREG_ACCESS)
557                 mh.attr.perms = iwch_convert_access(acc);
558         if (mr_rereg_mask & IB_MR_REREG_TRANS)
559                 ret = build_phys_page_list(buffer_list, num_phys_buf,
560                                            iova_start,
561                                            &total_size, &npages,
562                                            &shift, &page_list);
563
564         ret = iwch_reregister_mem(rhp, php, &mh, shift, page_list, npages);
565         kfree(page_list);
566         if (ret) {
567                 return ret;
568         }
569         if (mr_rereg_mask & IB_MR_REREG_PD)
570                 mhp->attr.pdid = php->pdid;
571         if (mr_rereg_mask & IB_MR_REREG_ACCESS)
572                 mhp->attr.perms = acc;
573         if (mr_rereg_mask & IB_MR_REREG_TRANS) {
574                 mhp->attr.zbva = 0;
575                 mhp->attr.va_fbo = *iova_start;
576                 mhp->attr.page_size = shift - 12;
577                 mhp->attr.len = (u32) total_size;
578                 mhp->attr.pbl_size = npages;
579         }
580
581         return 0;
582 }
583
584
585 static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
586                                       int acc, struct ib_udata *udata)
587 {
588         __be64 *pages;
589         int shift, n, len;
590         int i, j, k;
591         int err = 0;
592         struct ib_umem_chunk *chunk;
593         struct iwch_dev *rhp;
594         struct iwch_pd *php;
595         struct iwch_mr *mhp;
596         struct iwch_reg_user_mr_resp uresp;
597
598         PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
599         shift = ffs(region->page_size) - 1;
600
601         php = to_iwch_pd(pd);
602         rhp = php->rhp;
603         mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
604         if (!mhp)
605                 return ERR_PTR(-ENOMEM);
606
607         n = 0;
608         list_for_each_entry(chunk, &region->chunk_list, list)
609                 n += chunk->nents;
610
611         pages = kmalloc(n * sizeof(u64), GFP_KERNEL);
612         if (!pages) {
613                 err = -ENOMEM;
614                 goto err;
615         }
616
617         acc = iwch_convert_access(acc);
618
619         i = n = 0;
620
621         list_for_each_entry(chunk, &region->chunk_list, list)
622                 for (j = 0; j < chunk->nmap; ++j) {
623                         len = sg_dma_len(&chunk->page_list[j]) >> shift;
624                         for (k = 0; k < len; ++k) {
625                                 pages[i++] = cpu_to_be64(sg_dma_address(
626                                         &chunk->page_list[j]) +
627                                         region->page_size * k);
628                         }
629                 }
630
631         mhp->rhp = rhp;
632         mhp->attr.pdid = php->pdid;
633         mhp->attr.zbva = 0;
634         mhp->attr.perms = (acc & 0x1) << 3;
635         mhp->attr.perms |= (acc & 0x2) << 1;
636         mhp->attr.perms |= (acc & 0x4) >> 1;
637         mhp->attr.perms |= (acc & 0x8) >> 3;
638         mhp->attr.va_fbo = region->virt_base;
639         mhp->attr.page_size = shift - 12;
640         mhp->attr.len = (u32) region->length;
641         mhp->attr.pbl_size = i;
642         err = iwch_register_mem(rhp, php, mhp, shift, pages);
643         kfree(pages);
644         if (err)
645                 goto err;
646
647         if (udata && t3b_device(rhp)) {
648                 uresp.pbl_addr = (mhp->attr.pbl_addr -
649                                  rhp->rdev.rnic_info.pbl_base) >> 3;
650                 PDBG("%s user resp pbl_addr 0x%x\n", __FUNCTION__,
651                      uresp.pbl_addr);
652
653                 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
654                         iwch_dereg_mr(&mhp->ibmr);
655                         err = -EFAULT;
656                         goto err;
657                 }
658         }
659
660         return &mhp->ibmr;
661
662 err:
663         kfree(mhp);
664         return ERR_PTR(err);
665 }
666
667 static struct ib_mr *iwch_get_dma_mr(struct ib_pd *pd, int acc)
668 {
669         struct ib_phys_buf bl;
670         u64 kva;
671         struct ib_mr *ibmr;
672
673         PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
674
675         /*
676          * T3 only supports 32 bits of size.
677          */
678         bl.size = 0xffffffff;
679         bl.addr = 0;
680         kva = 0;
681         ibmr = iwch_register_phys_mem(pd, &bl, 1, acc, &kva);
682         return ibmr;
683 }
684
685 static struct ib_mw *iwch_alloc_mw(struct ib_pd *pd)
686 {
687         struct iwch_dev *rhp;
688         struct iwch_pd *php;
689         struct iwch_mw *mhp;
690         u32 mmid;
691         u32 stag = 0;
692         int ret;
693
694         php = to_iwch_pd(pd);
695         rhp = php->rhp;
696         mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
697         if (!mhp)
698                 return ERR_PTR(-ENOMEM);
699         ret = cxio_allocate_window(&rhp->rdev, &stag, php->pdid);
700         if (ret) {
701                 kfree(mhp);
702                 return ERR_PTR(ret);
703         }
704         mhp->rhp = rhp;
705         mhp->attr.pdid = php->pdid;
706         mhp->attr.type = TPT_MW;
707         mhp->attr.stag = stag;
708         mmid = (stag) >> 8;
709         insert_handle(rhp, &rhp->mmidr, mhp, mmid);
710         PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __FUNCTION__, mmid, mhp, stag);
711         return &(mhp->ibmw);
712 }
713
714 static int iwch_dealloc_mw(struct ib_mw *mw)
715 {
716         struct iwch_dev *rhp;
717         struct iwch_mw *mhp;
718         u32 mmid;
719
720         mhp = to_iwch_mw(mw);
721         rhp = mhp->rhp;
722         mmid = (mw->rkey) >> 8;
723         cxio_deallocate_window(&rhp->rdev, mhp->attr.stag);
724         remove_handle(rhp, &rhp->mmidr, mmid);
725         kfree(mhp);
726         PDBG("%s ib_mw %p mmid 0x%x ptr %p\n", __FUNCTION__, mw, mmid, mhp);
727         return 0;
728 }
729
730 static int iwch_destroy_qp(struct ib_qp *ib_qp)
731 {
732         struct iwch_dev *rhp;
733         struct iwch_qp *qhp;
734         struct iwch_qp_attributes attrs;
735         struct iwch_ucontext *ucontext;
736
737         qhp = to_iwch_qp(ib_qp);
738         rhp = qhp->rhp;
739
740         if (qhp->attr.state == IWCH_QP_STATE_RTS) {
741                 attrs.next_state = IWCH_QP_STATE_ERROR;
742                 iwch_modify_qp(rhp, qhp, IWCH_QP_ATTR_NEXT_STATE, &attrs, 0);
743         }
744         wait_event(qhp->wait, !qhp->ep);
745
746         remove_handle(rhp, &rhp->qpidr, qhp->wq.qpid);
747
748         atomic_dec(&qhp->refcnt);
749         wait_event(qhp->wait, !atomic_read(&qhp->refcnt));
750
751         ucontext = ib_qp->uobject ? to_iwch_ucontext(ib_qp->uobject->context)
752                                   : NULL;
753         cxio_destroy_qp(&rhp->rdev, &qhp->wq,
754                         ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
755
756         PDBG("%s ib_qp %p qpid 0x%0x qhp %p\n", __FUNCTION__,
757              ib_qp, qhp->wq.qpid, qhp);
758         kfree(qhp);
759         return 0;
760 }
761
762 static struct ib_qp *iwch_create_qp(struct ib_pd *pd,
763                              struct ib_qp_init_attr *attrs,
764                              struct ib_udata *udata)
765 {
766         struct iwch_dev *rhp;
767         struct iwch_qp *qhp;
768         struct iwch_pd *php;
769         struct iwch_cq *schp;
770         struct iwch_cq *rchp;
771         struct iwch_create_qp_resp uresp;
772         int wqsize, sqsize, rqsize;
773         struct iwch_ucontext *ucontext;
774
775         PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
776         if (attrs->qp_type != IB_QPT_RC)
777                 return ERR_PTR(-EINVAL);
778         php = to_iwch_pd(pd);
779         rhp = php->rhp;
780         schp = get_chp(rhp, ((struct iwch_cq *) attrs->send_cq)->cq.cqid);
781         rchp = get_chp(rhp, ((struct iwch_cq *) attrs->recv_cq)->cq.cqid);
782         if (!schp || !rchp)
783                 return ERR_PTR(-EINVAL);
784
785         /* The RQT size must be # of entries + 1 rounded up to a power of two */
786         rqsize = roundup_pow_of_two(attrs->cap.max_recv_wr);
787         if (rqsize == attrs->cap.max_recv_wr)
788                 rqsize = roundup_pow_of_two(attrs->cap.max_recv_wr+1);
789
790         /* T3 doesn't support RQT depth < 16 */
791         if (rqsize < 16)
792                 rqsize = 16;
793
794         if (rqsize > T3_MAX_RQ_SIZE)
795                 return ERR_PTR(-EINVAL);
796
797         /*
798          * NOTE: The SQ and total WQ sizes don't need to be
799          * a power of two.  However, all the code assumes
800          * they are. EG: Q_FREECNT() and friends.
801          */
802         sqsize = roundup_pow_of_two(attrs->cap.max_send_wr);
803         wqsize = roundup_pow_of_two(rqsize + sqsize);
804         PDBG("%s wqsize %d sqsize %d rqsize %d\n", __FUNCTION__,
805              wqsize, sqsize, rqsize);
806         qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
807         if (!qhp)
808                 return ERR_PTR(-ENOMEM);
809         qhp->wq.size_log2 = ilog2(wqsize);
810         qhp->wq.rq_size_log2 = ilog2(rqsize);
811         qhp->wq.sq_size_log2 = ilog2(sqsize);
812         ucontext = pd->uobject ? to_iwch_ucontext(pd->uobject->context) : NULL;
813         if (cxio_create_qp(&rhp->rdev, !udata, &qhp->wq,
814                            ucontext ? &ucontext->uctx : &rhp->rdev.uctx)) {
815                 kfree(qhp);
816                 return ERR_PTR(-ENOMEM);
817         }
818         attrs->cap.max_recv_wr = rqsize - 1;
819         attrs->cap.max_send_wr = sqsize;
820         qhp->rhp = rhp;
821         qhp->attr.pd = php->pdid;
822         qhp->attr.scq = ((struct iwch_cq *) attrs->send_cq)->cq.cqid;
823         qhp->attr.rcq = ((struct iwch_cq *) attrs->recv_cq)->cq.cqid;
824         qhp->attr.sq_num_entries = attrs->cap.max_send_wr;
825         qhp->attr.rq_num_entries = attrs->cap.max_recv_wr;
826         qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
827         qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
828         qhp->attr.rq_max_sges = attrs->cap.max_recv_sge;
829         qhp->attr.state = IWCH_QP_STATE_IDLE;
830         qhp->attr.next_state = IWCH_QP_STATE_IDLE;
831
832         /*
833          * XXX - These don't get passed in from the openib user
834          * at create time.  The CM sets them via a QP modify.
835          * Need to fix...  I think the CM should
836          */
837         qhp->attr.enable_rdma_read = 1;
838         qhp->attr.enable_rdma_write = 1;
839         qhp->attr.enable_bind = 1;
840         qhp->attr.max_ord = 1;
841         qhp->attr.max_ird = 1;
842
843         spin_lock_init(&qhp->lock);
844         init_waitqueue_head(&qhp->wait);
845         atomic_set(&qhp->refcnt, 1);
846         insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.qpid);
847
848         if (udata) {
849
850                 struct iwch_mm_entry *mm1, *mm2;
851
852                 mm1 = kmalloc(sizeof *mm1, GFP_KERNEL);
853                 if (!mm1) {
854                         iwch_destroy_qp(&qhp->ibqp);
855                         return ERR_PTR(-ENOMEM);
856                 }
857
858                 mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
859                 if (!mm2) {
860                         kfree(mm1);
861                         iwch_destroy_qp(&qhp->ibqp);
862                         return ERR_PTR(-ENOMEM);
863                 }
864
865                 uresp.qpid = qhp->wq.qpid;
866                 uresp.size_log2 = qhp->wq.size_log2;
867                 uresp.sq_size_log2 = qhp->wq.sq_size_log2;
868                 uresp.rq_size_log2 = qhp->wq.rq_size_log2;
869                 spin_lock(&ucontext->mmap_lock);
870                 uresp.key = ucontext->key;
871                 ucontext->key += PAGE_SIZE;
872                 uresp.db_key = ucontext->key;
873                 ucontext->key += PAGE_SIZE;
874                 spin_unlock(&ucontext->mmap_lock);
875                 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
876                         kfree(mm1);
877                         kfree(mm2);
878                         iwch_destroy_qp(&qhp->ibqp);
879                         return ERR_PTR(-EFAULT);
880                 }
881                 mm1->key = uresp.key;
882                 mm1->addr = virt_to_phys(qhp->wq.queue);
883                 mm1->len = PAGE_ALIGN(wqsize * sizeof (union t3_wr));
884                 insert_mmap(ucontext, mm1);
885                 mm2->key = uresp.db_key;
886                 mm2->addr = qhp->wq.udb & PAGE_MASK;
887                 mm2->len = PAGE_SIZE;
888                 insert_mmap(ucontext, mm2);
889         }
890         qhp->ibqp.qp_num = qhp->wq.qpid;
891         init_timer(&(qhp->timer));
892         PDBG("%s sq_num_entries %d, rq_num_entries %d "
893              "qpid 0x%0x qhp %p dma_addr 0x%llx size %d\n",
894              __FUNCTION__, qhp->attr.sq_num_entries, qhp->attr.rq_num_entries,
895              qhp->wq.qpid, qhp, (unsigned long long) qhp->wq.dma_addr,
896              1 << qhp->wq.size_log2);
897         return &qhp->ibqp;
898 }
899
900 static int iwch_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
901                       int attr_mask, struct ib_udata *udata)
902 {
903         struct iwch_dev *rhp;
904         struct iwch_qp *qhp;
905         enum iwch_qp_attr_mask mask = 0;
906         struct iwch_qp_attributes attrs;
907
908         PDBG("%s ib_qp %p\n", __FUNCTION__, ibqp);
909
910         /* iwarp does not support the RTR state */
911         if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR))
912                 attr_mask &= ~IB_QP_STATE;
913
914         /* Make sure we still have something left to do */
915         if (!attr_mask)
916                 return 0;
917
918         memset(&attrs, 0, sizeof attrs);
919         qhp = to_iwch_qp(ibqp);
920         rhp = qhp->rhp;
921
922         attrs.next_state = iwch_convert_state(attr->qp_state);
923         attrs.enable_rdma_read = (attr->qp_access_flags &
924                                IB_ACCESS_REMOTE_READ) ?  1 : 0;
925         attrs.enable_rdma_write = (attr->qp_access_flags &
926                                 IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
927         attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0;
928
929
930         mask |= (attr_mask & IB_QP_STATE) ? IWCH_QP_ATTR_NEXT_STATE : 0;
931         mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ?
932                         (IWCH_QP_ATTR_ENABLE_RDMA_READ |
933                          IWCH_QP_ATTR_ENABLE_RDMA_WRITE |
934                          IWCH_QP_ATTR_ENABLE_RDMA_BIND) : 0;
935
936         return iwch_modify_qp(rhp, qhp, mask, &attrs, 0);
937 }
938
939 void iwch_qp_add_ref(struct ib_qp *qp)
940 {
941         PDBG("%s ib_qp %p\n", __FUNCTION__, qp);
942         atomic_inc(&(to_iwch_qp(qp)->refcnt));
943 }
944
945 void iwch_qp_rem_ref(struct ib_qp *qp)
946 {
947         PDBG("%s ib_qp %p\n", __FUNCTION__, qp);
948         if (atomic_dec_and_test(&(to_iwch_qp(qp)->refcnt)))
949                 wake_up(&(to_iwch_qp(qp)->wait));
950 }
951
952 struct ib_qp *iwch_get_qp(struct ib_device *dev, int qpn)
953 {
954         PDBG("%s ib_dev %p qpn 0x%x\n", __FUNCTION__, dev, qpn);
955         return (struct ib_qp *)get_qhp(to_iwch_dev(dev), qpn);
956 }
957
958
959 static int iwch_query_pkey(struct ib_device *ibdev,
960                            u8 port, u16 index, u16 * pkey)
961 {
962         PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
963         *pkey = 0;
964         return 0;
965 }
966
967 static int iwch_query_gid(struct ib_device *ibdev, u8 port,
968                           int index, union ib_gid *gid)
969 {
970         struct iwch_dev *dev;
971
972         PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
973                __FUNCTION__, ibdev, port, index, gid);
974         dev = to_iwch_dev(ibdev);
975         BUG_ON(port == 0 || port > 2);
976         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
977         memcpy(&(gid->raw[0]), dev->rdev.port_info.lldevs[port-1]->dev_addr, 6);
978         return 0;
979 }
980
981 static int iwch_query_device(struct ib_device *ibdev,
982                              struct ib_device_attr *props)
983 {
984
985         struct iwch_dev *dev;
986         PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
987
988         dev = to_iwch_dev(ibdev);
989         memset(props, 0, sizeof *props);
990         memcpy(&props->sys_image_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
991         props->device_cap_flags = dev->device_cap_flags;
992         props->vendor_id = (u32)dev->rdev.rnic_info.pdev->vendor;
993         props->vendor_part_id = (u32)dev->rdev.rnic_info.pdev->device;
994         props->max_mr_size = ~0ull;
995         props->max_qp = dev->attr.max_qps;
996         props->max_qp_wr = dev->attr.max_wrs;
997         props->max_sge = dev->attr.max_sge_per_wr;
998         props->max_sge_rd = 1;
999         props->max_qp_rd_atom = dev->attr.max_rdma_reads_per_qp;
1000         props->max_cq = dev->attr.max_cqs;
1001         props->max_cqe = dev->attr.max_cqes_per_cq;
1002         props->max_mr = dev->attr.max_mem_regs;
1003         props->max_pd = dev->attr.max_pds;
1004         props->local_ca_ack_delay = 0;
1005
1006         return 0;
1007 }
1008
1009 static int iwch_query_port(struct ib_device *ibdev,
1010                            u8 port, struct ib_port_attr *props)
1011 {
1012         PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
1013         props->max_mtu = IB_MTU_4096;
1014         props->lid = 0;
1015         props->lmc = 0;
1016         props->sm_lid = 0;
1017         props->sm_sl = 0;
1018         props->state = IB_PORT_ACTIVE;
1019         props->phys_state = 0;
1020         props->port_cap_flags =
1021             IB_PORT_CM_SUP |
1022             IB_PORT_SNMP_TUNNEL_SUP |
1023             IB_PORT_REINIT_SUP |
1024             IB_PORT_DEVICE_MGMT_SUP |
1025             IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
1026         props->gid_tbl_len = 1;
1027         props->pkey_tbl_len = 1;
1028         props->qkey_viol_cntr = 0;
1029         props->active_width = 2;
1030         props->active_speed = 2;
1031         props->max_msg_sz = -1;
1032
1033         return 0;
1034 }
1035
1036 static ssize_t show_rev(struct class_device *cdev, char *buf)
1037 {
1038         struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1039                                             ibdev.class_dev);
1040         PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
1041         return sprintf(buf, "%d\n", dev->rdev.t3cdev_p->type);
1042 }
1043
1044 static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
1045 {
1046         struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1047                                             ibdev.class_dev);
1048         struct ethtool_drvinfo info;
1049         struct net_device *lldev = dev->rdev.t3cdev_p->lldev;
1050
1051         PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
1052         lldev->ethtool_ops->get_drvinfo(lldev, &info);
1053         return sprintf(buf, "%s\n", info.fw_version);
1054 }
1055
1056 static ssize_t show_hca(struct class_device *cdev, char *buf)
1057 {
1058         struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1059                                             ibdev.class_dev);
1060         struct ethtool_drvinfo info;
1061         struct net_device *lldev = dev->rdev.t3cdev_p->lldev;
1062
1063         PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
1064         lldev->ethtool_ops->get_drvinfo(lldev, &info);
1065         return sprintf(buf, "%s\n", info.driver);
1066 }
1067
1068 static ssize_t show_board(struct class_device *cdev, char *buf)
1069 {
1070         struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1071                                             ibdev.class_dev);
1072         PDBG("%s class dev 0x%p\n", __FUNCTION__, dev);
1073         return sprintf(buf, "%x.%x\n", dev->rdev.rnic_info.pdev->vendor,
1074                                        dev->rdev.rnic_info.pdev->device);
1075 }
1076
1077 static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1078 static CLASS_DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
1079 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1080 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
1081
1082 static struct class_device_attribute *iwch_class_attributes[] = {
1083         &class_device_attr_hw_rev,
1084         &class_device_attr_fw_ver,
1085         &class_device_attr_hca_type,
1086         &class_device_attr_board_id
1087 };
1088
1089 int iwch_register_device(struct iwch_dev *dev)
1090 {
1091         int ret;
1092         int i;
1093
1094         PDBG("%s iwch_dev %p\n", __FUNCTION__, dev);
1095         strlcpy(dev->ibdev.name, "cxgb3_%d", IB_DEVICE_NAME_MAX);
1096         memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
1097         memcpy(&dev->ibdev.node_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
1098         dev->ibdev.owner = THIS_MODULE;
1099         dev->device_cap_flags =
1100             (IB_DEVICE_ZERO_STAG |
1101              IB_DEVICE_SEND_W_INV | IB_DEVICE_MEM_WINDOW);
1102
1103         dev->ibdev.uverbs_cmd_mask =
1104             (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
1105             (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
1106             (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
1107             (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
1108             (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
1109             (1ull << IB_USER_VERBS_CMD_REG_MR) |
1110             (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
1111             (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1112             (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
1113             (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
1114             (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
1115             (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
1116             (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
1117             (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
1118             (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
1119             (1ull << IB_USER_VERBS_CMD_POST_SEND) |
1120             (1ull << IB_USER_VERBS_CMD_POST_RECV);
1121         dev->ibdev.node_type = RDMA_NODE_RNIC;
1122         memcpy(dev->ibdev.node_desc, IWCH_NODE_DESC, sizeof(IWCH_NODE_DESC));
1123         dev->ibdev.phys_port_cnt = dev->rdev.port_info.nports;
1124         dev->ibdev.dma_device = &(dev->rdev.rnic_info.pdev->dev);
1125         dev->ibdev.class_dev.dev = &(dev->rdev.rnic_info.pdev->dev);
1126         dev->ibdev.query_device = iwch_query_device;
1127         dev->ibdev.query_port = iwch_query_port;
1128         dev->ibdev.modify_port = iwch_modify_port;
1129         dev->ibdev.query_pkey = iwch_query_pkey;
1130         dev->ibdev.query_gid = iwch_query_gid;
1131         dev->ibdev.alloc_ucontext = iwch_alloc_ucontext;
1132         dev->ibdev.dealloc_ucontext = iwch_dealloc_ucontext;
1133         dev->ibdev.mmap = iwch_mmap;
1134         dev->ibdev.alloc_pd = iwch_allocate_pd;
1135         dev->ibdev.dealloc_pd = iwch_deallocate_pd;
1136         dev->ibdev.create_ah = iwch_ah_create;
1137         dev->ibdev.destroy_ah = iwch_ah_destroy;
1138         dev->ibdev.create_qp = iwch_create_qp;
1139         dev->ibdev.modify_qp = iwch_ib_modify_qp;
1140         dev->ibdev.destroy_qp = iwch_destroy_qp;
1141         dev->ibdev.create_cq = iwch_create_cq;
1142         dev->ibdev.destroy_cq = iwch_destroy_cq;
1143         dev->ibdev.resize_cq = iwch_resize_cq;
1144         dev->ibdev.poll_cq = iwch_poll_cq;
1145         dev->ibdev.get_dma_mr = iwch_get_dma_mr;
1146         dev->ibdev.reg_phys_mr = iwch_register_phys_mem;
1147         dev->ibdev.rereg_phys_mr = iwch_reregister_phys_mem;
1148         dev->ibdev.reg_user_mr = iwch_reg_user_mr;
1149         dev->ibdev.dereg_mr = iwch_dereg_mr;
1150         dev->ibdev.alloc_mw = iwch_alloc_mw;
1151         dev->ibdev.bind_mw = iwch_bind_mw;
1152         dev->ibdev.dealloc_mw = iwch_dealloc_mw;
1153
1154         dev->ibdev.attach_mcast = iwch_multicast_attach;
1155         dev->ibdev.detach_mcast = iwch_multicast_detach;
1156         dev->ibdev.process_mad = iwch_process_mad;
1157
1158         dev->ibdev.req_notify_cq = iwch_arm_cq;
1159         dev->ibdev.post_send = iwch_post_send;
1160         dev->ibdev.post_recv = iwch_post_receive;
1161
1162
1163         dev->ibdev.iwcm =
1164             (struct iw_cm_verbs *) kmalloc(sizeof(struct iw_cm_verbs),
1165                                            GFP_KERNEL);
1166         dev->ibdev.iwcm->connect = iwch_connect;
1167         dev->ibdev.iwcm->accept = iwch_accept_cr;
1168         dev->ibdev.iwcm->reject = iwch_reject_cr;
1169         dev->ibdev.iwcm->create_listen = iwch_create_listen;
1170         dev->ibdev.iwcm->destroy_listen = iwch_destroy_listen;
1171         dev->ibdev.iwcm->add_ref = iwch_qp_add_ref;
1172         dev->ibdev.iwcm->rem_ref = iwch_qp_rem_ref;
1173         dev->ibdev.iwcm->get_qp = iwch_get_qp;
1174
1175         ret = ib_register_device(&dev->ibdev);
1176         if (ret)
1177                 goto bail1;
1178
1179         for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i) {
1180                 ret = class_device_create_file(&dev->ibdev.class_dev,
1181                                                iwch_class_attributes[i]);
1182                 if (ret) {
1183                         goto bail2;
1184                 }
1185         }
1186         return 0;
1187 bail2:
1188         ib_unregister_device(&dev->ibdev);
1189 bail1:
1190         return ret;
1191 }
1192
1193 void iwch_unregister_device(struct iwch_dev *dev)
1194 {
1195         int i;
1196
1197         PDBG("%s iwch_dev %p\n", __FUNCTION__, dev);
1198         for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i)
1199                 class_device_remove_file(&dev->ibdev.class_dev,
1200                                          iwch_class_attributes[i]);
1201         ib_unregister_device(&dev->ibdev);
1202         return;
1203 }