RDMA/cxgb3: Handle build_phys_page_list() failure in iwch_reregister_phys_mem()
[linux-2.6.git] / drivers / infiniband / hw / cxgb3 / iwch_provider.c
1 /*
2  * Copyright (c) 2006 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
43 #include <asm/io.h>
44 #include <asm/irq.h>
45 #include <asm/byteorder.h>
46
47 #include <rdma/iw_cm.h>
48 #include <rdma/ib_verbs.h>
49 #include <rdma/ib_smi.h>
50 #include <rdma/ib_user_verbs.h>
51
52 #include "cxio_hal.h"
53 #include "iwch.h"
54 #include "iwch_provider.h"
55 #include "iwch_cm.h"
56 #include "iwch_user.h"
57
58 static int iwch_modify_port(struct ib_device *ibdev,
59                             u8 port, int port_modify_mask,
60                             struct ib_port_modify *props)
61 {
62         return -ENOSYS;
63 }
64
65 static struct ib_ah *iwch_ah_create(struct ib_pd *pd,
66                                     struct ib_ah_attr *ah_attr)
67 {
68         return ERR_PTR(-ENOSYS);
69 }
70
71 static int iwch_ah_destroy(struct ib_ah *ah)
72 {
73         return -ENOSYS;
74 }
75
76 static int iwch_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
77 {
78         return -ENOSYS;
79 }
80
81 static int iwch_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
82 {
83         return -ENOSYS;
84 }
85
86 static int iwch_process_mad(struct ib_device *ibdev,
87                             int mad_flags,
88                             u8 port_num,
89                             struct ib_wc *in_wc,
90                             struct ib_grh *in_grh,
91                             struct ib_mad *in_mad, struct ib_mad *out_mad)
92 {
93         return -ENOSYS;
94 }
95
96 static int iwch_dealloc_ucontext(struct ib_ucontext *context)
97 {
98         struct iwch_dev *rhp = to_iwch_dev(context->device);
99         struct iwch_ucontext *ucontext = to_iwch_ucontext(context);
100         struct iwch_mm_entry *mm, *tmp;
101
102         PDBG("%s context %p\n", __FUNCTION__, context);
103         list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
104                 kfree(mm);
105         cxio_release_ucontext(&rhp->rdev, &ucontext->uctx);
106         kfree(ucontext);
107         return 0;
108 }
109
110 static struct ib_ucontext *iwch_alloc_ucontext(struct ib_device *ibdev,
111                                         struct ib_udata *udata)
112 {
113         struct iwch_ucontext *context;
114         struct iwch_dev *rhp = to_iwch_dev(ibdev);
115
116         PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
117         context = kzalloc(sizeof(*context), GFP_KERNEL);
118         if (!context)
119                 return ERR_PTR(-ENOMEM);
120         cxio_init_ucontext(&rhp->rdev, &context->uctx);
121         INIT_LIST_HEAD(&context->mmaps);
122         spin_lock_init(&context->mmap_lock);
123         return &context->ibucontext;
124 }
125
126 static int iwch_destroy_cq(struct ib_cq *ib_cq)
127 {
128         struct iwch_cq *chp;
129
130         PDBG("%s ib_cq %p\n", __FUNCTION__, ib_cq);
131         chp = to_iwch_cq(ib_cq);
132
133         remove_handle(chp->rhp, &chp->rhp->cqidr, chp->cq.cqid);
134         atomic_dec(&chp->refcnt);
135         wait_event(chp->wait, !atomic_read(&chp->refcnt));
136
137         cxio_destroy_cq(&chp->rhp->rdev, &chp->cq);
138         kfree(chp);
139         return 0;
140 }
141
142 static struct ib_cq *iwch_create_cq(struct ib_device *ibdev, int entries,
143                              struct ib_ucontext *ib_context,
144                              struct ib_udata *udata)
145 {
146         struct iwch_dev *rhp;
147         struct iwch_cq *chp;
148         struct iwch_create_cq_resp uresp;
149         struct iwch_create_cq_req ureq;
150         struct iwch_ucontext *ucontext = NULL;
151
152         PDBG("%s ib_dev %p entries %d\n", __FUNCTION__, ibdev, entries);
153         rhp = to_iwch_dev(ibdev);
154         chp = kzalloc(sizeof(*chp), GFP_KERNEL);
155         if (!chp)
156                 return ERR_PTR(-ENOMEM);
157
158         if (ib_context) {
159                 ucontext = to_iwch_ucontext(ib_context);
160                 if (!t3a_device(rhp)) {
161                         if (ib_copy_from_udata(&ureq, udata, sizeof (ureq))) {
162                                 kfree(chp);
163                                 return ERR_PTR(-EFAULT);
164                         }
165                         chp->user_rptr_addr = (u32 __user *)(unsigned long)ureq.user_rptr_addr;
166                 }
167         }
168
169         if (t3a_device(rhp)) {
170
171                 /*
172                  * T3A: Add some fluff to handle extra CQEs inserted
173                  * for various errors.
174                  * Additional CQE possibilities:
175                  *      TERMINATE,
176                  *      incoming RDMA WRITE Failures
177                  *      incoming RDMA READ REQUEST FAILUREs
178                  * NOTE: We cannot ensure the CQ won't overflow.
179                  */
180                 entries += 16;
181         }
182         entries = roundup_pow_of_two(entries);
183         chp->cq.size_log2 = ilog2(entries);
184
185         if (cxio_create_cq(&rhp->rdev, &chp->cq)) {
186                 kfree(chp);
187                 return ERR_PTR(-ENOMEM);
188         }
189         chp->rhp = rhp;
190         chp->ibcq.cqe = (1 << chp->cq.size_log2) - 1;
191         spin_lock_init(&chp->lock);
192         atomic_set(&chp->refcnt, 1);
193         init_waitqueue_head(&chp->wait);
194         insert_handle(rhp, &rhp->cqidr, chp, chp->cq.cqid);
195
196         if (ucontext) {
197                 struct iwch_mm_entry *mm;
198
199                 mm = kmalloc(sizeof *mm, GFP_KERNEL);
200                 if (!mm) {
201                         iwch_destroy_cq(&chp->ibcq);
202                         return ERR_PTR(-ENOMEM);
203                 }
204                 uresp.cqid = chp->cq.cqid;
205                 uresp.size_log2 = chp->cq.size_log2;
206                 spin_lock(&ucontext->mmap_lock);
207                 uresp.key = ucontext->key;
208                 ucontext->key += PAGE_SIZE;
209                 spin_unlock(&ucontext->mmap_lock);
210                 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
211                         kfree(mm);
212                         iwch_destroy_cq(&chp->ibcq);
213                         return ERR_PTR(-EFAULT);
214                 }
215                 mm->key = uresp.key;
216                 mm->addr = virt_to_phys(chp->cq.queue);
217                 mm->len = PAGE_ALIGN((1UL << uresp.size_log2) *
218                                              sizeof (struct t3_cqe));
219                 insert_mmap(ucontext, mm);
220         }
221         PDBG("created cqid 0x%0x chp %p size 0x%0x, dma_addr 0x%0llx\n",
222              chp->cq.cqid, chp, (1 << chp->cq.size_log2),
223              (unsigned long long) chp->cq.dma_addr);
224         return &chp->ibcq;
225 }
226
227 static int iwch_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata)
228 {
229 #ifdef notyet
230         struct iwch_cq *chp = to_iwch_cq(cq);
231         struct t3_cq oldcq, newcq;
232         int ret;
233
234         PDBG("%s ib_cq %p cqe %d\n", __FUNCTION__, cq, cqe);
235
236         /* We don't downsize... */
237         if (cqe <= cq->cqe)
238                 return 0;
239
240         /* create new t3_cq with new size */
241         cqe = roundup_pow_of_two(cqe+1);
242         newcq.size_log2 = ilog2(cqe);
243
244         /* Dont allow resize to less than the current wce count */
245         if (cqe < Q_COUNT(chp->cq.rptr, chp->cq.wptr)) {
246                 return -ENOMEM;
247         }
248
249         /* Quiesce all QPs using this CQ */
250         ret = iwch_quiesce_qps(chp);
251         if (ret) {
252                 return ret;
253         }
254
255         ret = cxio_create_cq(&chp->rhp->rdev, &newcq);
256         if (ret) {
257                 return ret;
258         }
259
260         /* copy CQEs */
261         memcpy(newcq.queue, chp->cq.queue, (1 << chp->cq.size_log2) *
262                                         sizeof(struct t3_cqe));
263
264         /* old iwch_qp gets new t3_cq but keeps old cqid */
265         oldcq = chp->cq;
266         chp->cq = newcq;
267         chp->cq.cqid = oldcq.cqid;
268
269         /* resize new t3_cq to update the HW context */
270         ret = cxio_resize_cq(&chp->rhp->rdev, &chp->cq);
271         if (ret) {
272                 chp->cq = oldcq;
273                 return ret;
274         }
275         chp->ibcq.cqe = (1<<chp->cq.size_log2) - 1;
276
277         /* destroy old t3_cq */
278         oldcq.cqid = newcq.cqid;
279         ret = cxio_destroy_cq(&chp->rhp->rdev, &oldcq);
280         if (ret) {
281                 printk(KERN_ERR MOD "%s - cxio_destroy_cq failed %d\n",
282                         __FUNCTION__, ret);
283         }
284
285         /* add user hooks here */
286
287         /* resume qps */
288         ret = iwch_resume_qps(chp);
289         return ret;
290 #else
291         return -ENOSYS;
292 #endif
293 }
294
295 static int iwch_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify notify)
296 {
297         struct iwch_dev *rhp;
298         struct iwch_cq *chp;
299         enum t3_cq_opcode cq_op;
300         int err;
301         unsigned long flag;
302         u32 rptr;
303
304         chp = to_iwch_cq(ibcq);
305         rhp = chp->rhp;
306         if (notify == IB_CQ_SOLICITED)
307                 cq_op = CQ_ARM_SE;
308         else
309                 cq_op = CQ_ARM_AN;
310         if (chp->user_rptr_addr) {
311                 if (get_user(rptr, chp->user_rptr_addr))
312                         return -EFAULT;
313                 spin_lock_irqsave(&chp->lock, flag);
314                 chp->cq.rptr = rptr;
315         } else
316                 spin_lock_irqsave(&chp->lock, flag);
317         PDBG("%s rptr 0x%x\n", __FUNCTION__, chp->cq.rptr);
318         err = cxio_hal_cq_op(&rhp->rdev, &chp->cq, cq_op, 0);
319         spin_unlock_irqrestore(&chp->lock, flag);
320         if (err)
321                 printk(KERN_ERR MOD "Error %d rearming CQID 0x%x\n", err,
322                        chp->cq.cqid);
323         return err;
324 }
325
326 static int iwch_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
327 {
328         int len = vma->vm_end - vma->vm_start;
329         u32 key = vma->vm_pgoff << PAGE_SHIFT;
330         struct cxio_rdev *rdev_p;
331         int ret = 0;
332         struct iwch_mm_entry *mm;
333         struct iwch_ucontext *ucontext;
334         u64 addr;
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         addr = mm->addr;
350         kfree(mm);
351
352         if ((addr >= rdev_p->rnic_info.udbell_physbase) &&
353             (addr < (rdev_p->rnic_info.udbell_physbase +
354                        rdev_p->rnic_info.udbell_len))) {
355
356                 /*
357                  * Map T3 DB register.
358                  */
359                 if (vma->vm_flags & VM_READ) {
360                         return -EPERM;
361                 }
362
363                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
364                 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
365                 vma->vm_flags &= ~VM_MAYREAD;
366                 ret = io_remap_pfn_range(vma, vma->vm_start,
367                                          addr >> PAGE_SHIFT,
368                                          len, vma->vm_page_prot);
369         } else {
370
371                 /*
372                  * Map WQ or CQ contig dma memory...
373                  */
374                 ret = remap_pfn_range(vma, vma->vm_start,
375                                       addr >> PAGE_SHIFT,
376                                       len, vma->vm_page_prot);
377         }
378
379         return ret;
380 }
381
382 static int iwch_deallocate_pd(struct ib_pd *pd)
383 {
384         struct iwch_dev *rhp;
385         struct iwch_pd *php;
386
387         php = to_iwch_pd(pd);
388         rhp = php->rhp;
389         PDBG("%s ibpd %p pdid 0x%x\n", __FUNCTION__, pd, php->pdid);
390         cxio_hal_put_pdid(rhp->rdev.rscp, php->pdid);
391         kfree(php);
392         return 0;
393 }
394
395 static struct ib_pd *iwch_allocate_pd(struct ib_device *ibdev,
396                                struct ib_ucontext *context,
397                                struct ib_udata *udata)
398 {
399         struct iwch_pd *php;
400         u32 pdid;
401         struct iwch_dev *rhp;
402
403         PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
404         rhp = (struct iwch_dev *) ibdev;
405         pdid = cxio_hal_get_pdid(rhp->rdev.rscp);
406         if (!pdid)
407                 return ERR_PTR(-EINVAL);
408         php = kzalloc(sizeof(*php), GFP_KERNEL);
409         if (!php) {
410                 cxio_hal_put_pdid(rhp->rdev.rscp, pdid);
411                 return ERR_PTR(-ENOMEM);
412         }
413         php->pdid = pdid;
414         php->rhp = rhp;
415         if (context) {
416                 if (ib_copy_to_udata(udata, &php->pdid, sizeof (__u32))) {
417                         iwch_deallocate_pd(&php->ibpd);
418                         return ERR_PTR(-EFAULT);
419                 }
420         }
421         PDBG("%s pdid 0x%0x ptr 0x%p\n", __FUNCTION__, pdid, php);
422         return &php->ibpd;
423 }
424
425 static int iwch_dereg_mr(struct ib_mr *ib_mr)
426 {
427         struct iwch_dev *rhp;
428         struct iwch_mr *mhp;
429         u32 mmid;
430
431         PDBG("%s ib_mr %p\n", __FUNCTION__, ib_mr);
432         /* There can be no memory windows */
433         if (atomic_read(&ib_mr->usecnt))
434                 return -EINVAL;
435
436         mhp = to_iwch_mr(ib_mr);
437         rhp = mhp->rhp;
438         mmid = mhp->attr.stag >> 8;
439         cxio_dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
440                        mhp->attr.pbl_addr);
441         remove_handle(rhp, &rhp->mmidr, mmid);
442         if (mhp->kva)
443                 kfree((void *) (unsigned long) mhp->kva);
444         PDBG("%s mmid 0x%x ptr %p\n", __FUNCTION__, mmid, mhp);
445         kfree(mhp);
446         return 0;
447 }
448
449 static struct ib_mr *iwch_register_phys_mem(struct ib_pd *pd,
450                                         struct ib_phys_buf *buffer_list,
451                                         int num_phys_buf,
452                                         int acc,
453                                         u64 *iova_start)
454 {
455         __be64 *page_list;
456         int shift;
457         u64 total_size;
458         int npages;
459         struct iwch_dev *rhp;
460         struct iwch_pd *php;
461         struct iwch_mr *mhp;
462         int ret;
463
464         PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
465         php = to_iwch_pd(pd);
466         rhp = php->rhp;
467
468         mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
469         if (!mhp)
470                 return ERR_PTR(-ENOMEM);
471
472         /* First check that we have enough alignment */
473         if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK)) {
474                 ret = -EINVAL;
475                 goto err;
476         }
477
478         if (num_phys_buf > 1 &&
479             ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK)) {
480                 ret = -EINVAL;
481                 goto err;
482         }
483
484         ret = build_phys_page_list(buffer_list, num_phys_buf, iova_start,
485                                    &total_size, &npages, &shift, &page_list);
486         if (ret)
487                 goto err;
488
489         mhp->rhp = rhp;
490         mhp->attr.pdid = php->pdid;
491         mhp->attr.zbva = 0;
492
493         mhp->attr.perms = iwch_ib_to_tpt_access(acc);
494         mhp->attr.va_fbo = *iova_start;
495         mhp->attr.page_size = shift - 12;
496
497         mhp->attr.len = (u32) total_size;
498         mhp->attr.pbl_size = npages;
499         ret = iwch_register_mem(rhp, php, mhp, shift, page_list);
500         kfree(page_list);
501         if (ret) {
502                 goto err;
503         }
504         return &mhp->ibmr;
505 err:
506         kfree(mhp);
507         return ERR_PTR(ret);
508
509 }
510
511 static int iwch_reregister_phys_mem(struct ib_mr *mr,
512                                      int mr_rereg_mask,
513                                      struct ib_pd *pd,
514                                      struct ib_phys_buf *buffer_list,
515                                      int num_phys_buf,
516                                      int acc, u64 * iova_start)
517 {
518
519         struct iwch_mr mh, *mhp;
520         struct iwch_pd *php;
521         struct iwch_dev *rhp;
522         __be64 *page_list = NULL;
523         int shift = 0;
524         u64 total_size;
525         int npages;
526         int ret;
527
528         PDBG("%s ib_mr %p ib_pd %p\n", __FUNCTION__, mr, pd);
529
530         /* There can be no memory windows */
531         if (atomic_read(&mr->usecnt))
532                 return -EINVAL;
533
534         mhp = to_iwch_mr(mr);
535         rhp = mhp->rhp;
536         php = to_iwch_pd(mr->pd);
537
538         /* make sure we are on the same adapter */
539         if (rhp != php->rhp)
540                 return -EINVAL;
541
542         memcpy(&mh, mhp, sizeof *mhp);
543
544         if (mr_rereg_mask & IB_MR_REREG_PD)
545                 php = to_iwch_pd(pd);
546         if (mr_rereg_mask & IB_MR_REREG_ACCESS)
547                 mh.attr.perms = iwch_ib_to_tpt_access(acc);
548         if (mr_rereg_mask & IB_MR_REREG_TRANS) {
549                 ret = build_phys_page_list(buffer_list, num_phys_buf,
550                                            iova_start,
551                                            &total_size, &npages,
552                                            &shift, &page_list);
553                 if (ret)
554                         return ret;
555         }
556
557         ret = iwch_reregister_mem(rhp, php, &mh, shift, page_list, npages);
558         kfree(page_list);
559         if (ret) {
560                 return ret;
561         }
562         if (mr_rereg_mask & IB_MR_REREG_PD)
563                 mhp->attr.pdid = php->pdid;
564         if (mr_rereg_mask & IB_MR_REREG_ACCESS)
565                 mhp->attr.perms = iwch_ib_to_tpt_access(acc);
566         if (mr_rereg_mask & IB_MR_REREG_TRANS) {
567                 mhp->attr.zbva = 0;
568                 mhp->attr.va_fbo = *iova_start;
569                 mhp->attr.page_size = shift - 12;
570                 mhp->attr.len = (u32) total_size;
571                 mhp->attr.pbl_size = npages;
572         }
573
574         return 0;
575 }
576
577
578 static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
579                                       int acc, struct ib_udata *udata)
580 {
581         __be64 *pages;
582         int shift, n, len;
583         int i, j, k;
584         int err = 0;
585         struct ib_umem_chunk *chunk;
586         struct iwch_dev *rhp;
587         struct iwch_pd *php;
588         struct iwch_mr *mhp;
589         struct iwch_reg_user_mr_resp uresp;
590
591         PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
592         shift = ffs(region->page_size) - 1;
593
594         php = to_iwch_pd(pd);
595         rhp = php->rhp;
596         mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
597         if (!mhp)
598                 return ERR_PTR(-ENOMEM);
599
600         n = 0;
601         list_for_each_entry(chunk, &region->chunk_list, list)
602                 n += chunk->nents;
603
604         pages = kmalloc(n * sizeof(u64), GFP_KERNEL);
605         if (!pages) {
606                 err = -ENOMEM;
607                 goto err;
608         }
609
610         i = n = 0;
611
612         list_for_each_entry(chunk, &region->chunk_list, list)
613                 for (j = 0; j < chunk->nmap; ++j) {
614                         len = sg_dma_len(&chunk->page_list[j]) >> shift;
615                         for (k = 0; k < len; ++k) {
616                                 pages[i++] = cpu_to_be64(sg_dma_address(
617                                         &chunk->page_list[j]) +
618                                         region->page_size * k);
619                         }
620                 }
621
622         mhp->rhp = rhp;
623         mhp->attr.pdid = php->pdid;
624         mhp->attr.zbva = 0;
625         mhp->attr.perms = iwch_ib_to_tpt_access(acc);
626         mhp->attr.va_fbo = region->virt_base;
627         mhp->attr.page_size = shift - 12;
628         mhp->attr.len = (u32) region->length;
629         mhp->attr.pbl_size = i;
630         err = iwch_register_mem(rhp, php, mhp, shift, pages);
631         kfree(pages);
632         if (err)
633                 goto err;
634
635         if (udata && t3b_device(rhp)) {
636                 uresp.pbl_addr = (mhp->attr.pbl_addr -
637                                  rhp->rdev.rnic_info.pbl_base) >> 3;
638                 PDBG("%s user resp pbl_addr 0x%x\n", __FUNCTION__,
639                      uresp.pbl_addr);
640
641                 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
642                         iwch_dereg_mr(&mhp->ibmr);
643                         err = -EFAULT;
644                         goto err;
645                 }
646         }
647
648         return &mhp->ibmr;
649
650 err:
651         kfree(mhp);
652         return ERR_PTR(err);
653 }
654
655 static struct ib_mr *iwch_get_dma_mr(struct ib_pd *pd, int acc)
656 {
657         struct ib_phys_buf bl;
658         u64 kva;
659         struct ib_mr *ibmr;
660
661         PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
662
663         /*
664          * T3 only supports 32 bits of size.
665          */
666         bl.size = 0xffffffff;
667         bl.addr = 0;
668         kva = 0;
669         ibmr = iwch_register_phys_mem(pd, &bl, 1, acc, &kva);
670         return ibmr;
671 }
672
673 static struct ib_mw *iwch_alloc_mw(struct ib_pd *pd)
674 {
675         struct iwch_dev *rhp;
676         struct iwch_pd *php;
677         struct iwch_mw *mhp;
678         u32 mmid;
679         u32 stag = 0;
680         int ret;
681
682         php = to_iwch_pd(pd);
683         rhp = php->rhp;
684         mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
685         if (!mhp)
686                 return ERR_PTR(-ENOMEM);
687         ret = cxio_allocate_window(&rhp->rdev, &stag, php->pdid);
688         if (ret) {
689                 kfree(mhp);
690                 return ERR_PTR(ret);
691         }
692         mhp->rhp = rhp;
693         mhp->attr.pdid = php->pdid;
694         mhp->attr.type = TPT_MW;
695         mhp->attr.stag = stag;
696         mmid = (stag) >> 8;
697         insert_handle(rhp, &rhp->mmidr, mhp, mmid);
698         PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __FUNCTION__, mmid, mhp, stag);
699         return &(mhp->ibmw);
700 }
701
702 static int iwch_dealloc_mw(struct ib_mw *mw)
703 {
704         struct iwch_dev *rhp;
705         struct iwch_mw *mhp;
706         u32 mmid;
707
708         mhp = to_iwch_mw(mw);
709         rhp = mhp->rhp;
710         mmid = (mw->rkey) >> 8;
711         cxio_deallocate_window(&rhp->rdev, mhp->attr.stag);
712         remove_handle(rhp, &rhp->mmidr, mmid);
713         kfree(mhp);
714         PDBG("%s ib_mw %p mmid 0x%x ptr %p\n", __FUNCTION__, mw, mmid, mhp);
715         return 0;
716 }
717
718 static int iwch_destroy_qp(struct ib_qp *ib_qp)
719 {
720         struct iwch_dev *rhp;
721         struct iwch_qp *qhp;
722         struct iwch_qp_attributes attrs;
723         struct iwch_ucontext *ucontext;
724
725         qhp = to_iwch_qp(ib_qp);
726         rhp = qhp->rhp;
727
728         attrs.next_state = IWCH_QP_STATE_ERROR;
729         iwch_modify_qp(rhp, qhp, IWCH_QP_ATTR_NEXT_STATE, &attrs, 0);
730         wait_event(qhp->wait, !qhp->ep);
731
732         remove_handle(rhp, &rhp->qpidr, qhp->wq.qpid);
733
734         atomic_dec(&qhp->refcnt);
735         wait_event(qhp->wait, !atomic_read(&qhp->refcnt));
736
737         ucontext = ib_qp->uobject ? to_iwch_ucontext(ib_qp->uobject->context)
738                                   : NULL;
739         cxio_destroy_qp(&rhp->rdev, &qhp->wq,
740                         ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
741
742         PDBG("%s ib_qp %p qpid 0x%0x qhp %p\n", __FUNCTION__,
743              ib_qp, qhp->wq.qpid, qhp);
744         kfree(qhp);
745         return 0;
746 }
747
748 static struct ib_qp *iwch_create_qp(struct ib_pd *pd,
749                              struct ib_qp_init_attr *attrs,
750                              struct ib_udata *udata)
751 {
752         struct iwch_dev *rhp;
753         struct iwch_qp *qhp;
754         struct iwch_pd *php;
755         struct iwch_cq *schp;
756         struct iwch_cq *rchp;
757         struct iwch_create_qp_resp uresp;
758         int wqsize, sqsize, rqsize;
759         struct iwch_ucontext *ucontext;
760
761         PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
762         if (attrs->qp_type != IB_QPT_RC)
763                 return ERR_PTR(-EINVAL);
764         php = to_iwch_pd(pd);
765         rhp = php->rhp;
766         schp = get_chp(rhp, ((struct iwch_cq *) attrs->send_cq)->cq.cqid);
767         rchp = get_chp(rhp, ((struct iwch_cq *) attrs->recv_cq)->cq.cqid);
768         if (!schp || !rchp)
769                 return ERR_PTR(-EINVAL);
770
771         /* The RQT size must be # of entries + 1 rounded up to a power of two */
772         rqsize = roundup_pow_of_two(attrs->cap.max_recv_wr);
773         if (rqsize == attrs->cap.max_recv_wr)
774                 rqsize = roundup_pow_of_two(attrs->cap.max_recv_wr+1);
775
776         /* T3 doesn't support RQT depth < 16 */
777         if (rqsize < 16)
778                 rqsize = 16;
779
780         if (rqsize > T3_MAX_RQ_SIZE)
781                 return ERR_PTR(-EINVAL);
782
783         /*
784          * NOTE: The SQ and total WQ sizes don't need to be
785          * a power of two.  However, all the code assumes
786          * they are. EG: Q_FREECNT() and friends.
787          */
788         sqsize = roundup_pow_of_two(attrs->cap.max_send_wr);
789         wqsize = roundup_pow_of_two(rqsize + sqsize);
790         PDBG("%s wqsize %d sqsize %d rqsize %d\n", __FUNCTION__,
791              wqsize, sqsize, rqsize);
792         qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
793         if (!qhp)
794                 return ERR_PTR(-ENOMEM);
795         qhp->wq.size_log2 = ilog2(wqsize);
796         qhp->wq.rq_size_log2 = ilog2(rqsize);
797         qhp->wq.sq_size_log2 = ilog2(sqsize);
798         ucontext = pd->uobject ? to_iwch_ucontext(pd->uobject->context) : NULL;
799         if (cxio_create_qp(&rhp->rdev, !udata, &qhp->wq,
800                            ucontext ? &ucontext->uctx : &rhp->rdev.uctx)) {
801                 kfree(qhp);
802                 return ERR_PTR(-ENOMEM);
803         }
804         attrs->cap.max_recv_wr = rqsize - 1;
805         attrs->cap.max_send_wr = sqsize;
806         qhp->rhp = rhp;
807         qhp->attr.pd = php->pdid;
808         qhp->attr.scq = ((struct iwch_cq *) attrs->send_cq)->cq.cqid;
809         qhp->attr.rcq = ((struct iwch_cq *) attrs->recv_cq)->cq.cqid;
810         qhp->attr.sq_num_entries = attrs->cap.max_send_wr;
811         qhp->attr.rq_num_entries = attrs->cap.max_recv_wr;
812         qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
813         qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
814         qhp->attr.rq_max_sges = attrs->cap.max_recv_sge;
815         qhp->attr.state = IWCH_QP_STATE_IDLE;
816         qhp->attr.next_state = IWCH_QP_STATE_IDLE;
817
818         /*
819          * XXX - These don't get passed in from the openib user
820          * at create time.  The CM sets them via a QP modify.
821          * Need to fix...  I think the CM should
822          */
823         qhp->attr.enable_rdma_read = 1;
824         qhp->attr.enable_rdma_write = 1;
825         qhp->attr.enable_bind = 1;
826         qhp->attr.max_ord = 1;
827         qhp->attr.max_ird = 1;
828
829         spin_lock_init(&qhp->lock);
830         init_waitqueue_head(&qhp->wait);
831         atomic_set(&qhp->refcnt, 1);
832         insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.qpid);
833
834         if (udata) {
835
836                 struct iwch_mm_entry *mm1, *mm2;
837
838                 mm1 = kmalloc(sizeof *mm1, GFP_KERNEL);
839                 if (!mm1) {
840                         iwch_destroy_qp(&qhp->ibqp);
841                         return ERR_PTR(-ENOMEM);
842                 }
843
844                 mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
845                 if (!mm2) {
846                         kfree(mm1);
847                         iwch_destroy_qp(&qhp->ibqp);
848                         return ERR_PTR(-ENOMEM);
849                 }
850
851                 uresp.qpid = qhp->wq.qpid;
852                 uresp.size_log2 = qhp->wq.size_log2;
853                 uresp.sq_size_log2 = qhp->wq.sq_size_log2;
854                 uresp.rq_size_log2 = qhp->wq.rq_size_log2;
855                 spin_lock(&ucontext->mmap_lock);
856                 uresp.key = ucontext->key;
857                 ucontext->key += PAGE_SIZE;
858                 uresp.db_key = ucontext->key;
859                 ucontext->key += PAGE_SIZE;
860                 spin_unlock(&ucontext->mmap_lock);
861                 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
862                         kfree(mm1);
863                         kfree(mm2);
864                         iwch_destroy_qp(&qhp->ibqp);
865                         return ERR_PTR(-EFAULT);
866                 }
867                 mm1->key = uresp.key;
868                 mm1->addr = virt_to_phys(qhp->wq.queue);
869                 mm1->len = PAGE_ALIGN(wqsize * sizeof (union t3_wr));
870                 insert_mmap(ucontext, mm1);
871                 mm2->key = uresp.db_key;
872                 mm2->addr = qhp->wq.udb & PAGE_MASK;
873                 mm2->len = PAGE_SIZE;
874                 insert_mmap(ucontext, mm2);
875         }
876         qhp->ibqp.qp_num = qhp->wq.qpid;
877         init_timer(&(qhp->timer));
878         PDBG("%s sq_num_entries %d, rq_num_entries %d "
879              "qpid 0x%0x qhp %p dma_addr 0x%llx size %d\n",
880              __FUNCTION__, qhp->attr.sq_num_entries, qhp->attr.rq_num_entries,
881              qhp->wq.qpid, qhp, (unsigned long long) qhp->wq.dma_addr,
882              1 << qhp->wq.size_log2);
883         return &qhp->ibqp;
884 }
885
886 static int iwch_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
887                       int attr_mask, struct ib_udata *udata)
888 {
889         struct iwch_dev *rhp;
890         struct iwch_qp *qhp;
891         enum iwch_qp_attr_mask mask = 0;
892         struct iwch_qp_attributes attrs;
893
894         PDBG("%s ib_qp %p\n", __FUNCTION__, ibqp);
895
896         /* iwarp does not support the RTR state */
897         if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR))
898                 attr_mask &= ~IB_QP_STATE;
899
900         /* Make sure we still have something left to do */
901         if (!attr_mask)
902                 return 0;
903
904         memset(&attrs, 0, sizeof attrs);
905         qhp = to_iwch_qp(ibqp);
906         rhp = qhp->rhp;
907
908         attrs.next_state = iwch_convert_state(attr->qp_state);
909         attrs.enable_rdma_read = (attr->qp_access_flags &
910                                IB_ACCESS_REMOTE_READ) ?  1 : 0;
911         attrs.enable_rdma_write = (attr->qp_access_flags &
912                                 IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
913         attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0;
914
915
916         mask |= (attr_mask & IB_QP_STATE) ? IWCH_QP_ATTR_NEXT_STATE : 0;
917         mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ?
918                         (IWCH_QP_ATTR_ENABLE_RDMA_READ |
919                          IWCH_QP_ATTR_ENABLE_RDMA_WRITE |
920                          IWCH_QP_ATTR_ENABLE_RDMA_BIND) : 0;
921
922         return iwch_modify_qp(rhp, qhp, mask, &attrs, 0);
923 }
924
925 void iwch_qp_add_ref(struct ib_qp *qp)
926 {
927         PDBG("%s ib_qp %p\n", __FUNCTION__, qp);
928         atomic_inc(&(to_iwch_qp(qp)->refcnt));
929 }
930
931 void iwch_qp_rem_ref(struct ib_qp *qp)
932 {
933         PDBG("%s ib_qp %p\n", __FUNCTION__, qp);
934         if (atomic_dec_and_test(&(to_iwch_qp(qp)->refcnt)))
935                 wake_up(&(to_iwch_qp(qp)->wait));
936 }
937
938 static struct ib_qp *iwch_get_qp(struct ib_device *dev, int qpn)
939 {
940         PDBG("%s ib_dev %p qpn 0x%x\n", __FUNCTION__, dev, qpn);
941         return (struct ib_qp *)get_qhp(to_iwch_dev(dev), qpn);
942 }
943
944
945 static int iwch_query_pkey(struct ib_device *ibdev,
946                            u8 port, u16 index, u16 * pkey)
947 {
948         PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
949         *pkey = 0;
950         return 0;
951 }
952
953 static int iwch_query_gid(struct ib_device *ibdev, u8 port,
954                           int index, union ib_gid *gid)
955 {
956         struct iwch_dev *dev;
957
958         PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
959                __FUNCTION__, ibdev, port, index, gid);
960         dev = to_iwch_dev(ibdev);
961         BUG_ON(port == 0 || port > 2);
962         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
963         memcpy(&(gid->raw[0]), dev->rdev.port_info.lldevs[port-1]->dev_addr, 6);
964         return 0;
965 }
966
967 static int iwch_query_device(struct ib_device *ibdev,
968                              struct ib_device_attr *props)
969 {
970
971         struct iwch_dev *dev;
972         PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
973
974         dev = to_iwch_dev(ibdev);
975         memset(props, 0, sizeof *props);
976         memcpy(&props->sys_image_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
977         props->device_cap_flags = dev->device_cap_flags;
978         props->vendor_id = (u32)dev->rdev.rnic_info.pdev->vendor;
979         props->vendor_part_id = (u32)dev->rdev.rnic_info.pdev->device;
980         props->max_mr_size = ~0ull;
981         props->max_qp = dev->attr.max_qps;
982         props->max_qp_wr = dev->attr.max_wrs;
983         props->max_sge = dev->attr.max_sge_per_wr;
984         props->max_sge_rd = 1;
985         props->max_qp_rd_atom = dev->attr.max_rdma_reads_per_qp;
986         props->max_cq = dev->attr.max_cqs;
987         props->max_cqe = dev->attr.max_cqes_per_cq;
988         props->max_mr = dev->attr.max_mem_regs;
989         props->max_pd = dev->attr.max_pds;
990         props->local_ca_ack_delay = 0;
991
992         return 0;
993 }
994
995 static int iwch_query_port(struct ib_device *ibdev,
996                            u8 port, struct ib_port_attr *props)
997 {
998         PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
999         props->max_mtu = IB_MTU_4096;
1000         props->lid = 0;
1001         props->lmc = 0;
1002         props->sm_lid = 0;
1003         props->sm_sl = 0;
1004         props->state = IB_PORT_ACTIVE;
1005         props->phys_state = 0;
1006         props->port_cap_flags =
1007             IB_PORT_CM_SUP |
1008             IB_PORT_SNMP_TUNNEL_SUP |
1009             IB_PORT_REINIT_SUP |
1010             IB_PORT_DEVICE_MGMT_SUP |
1011             IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
1012         props->gid_tbl_len = 1;
1013         props->pkey_tbl_len = 1;
1014         props->qkey_viol_cntr = 0;
1015         props->active_width = 2;
1016         props->active_speed = 2;
1017         props->max_msg_sz = -1;
1018
1019         return 0;
1020 }
1021
1022 static ssize_t show_rev(struct class_device *cdev, char *buf)
1023 {
1024         struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1025                                             ibdev.class_dev);
1026         PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
1027         return sprintf(buf, "%d\n", dev->rdev.t3cdev_p->type);
1028 }
1029
1030 static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
1031 {
1032         struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1033                                             ibdev.class_dev);
1034         struct ethtool_drvinfo info;
1035         struct net_device *lldev = dev->rdev.t3cdev_p->lldev;
1036
1037         PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
1038         lldev->ethtool_ops->get_drvinfo(lldev, &info);
1039         return sprintf(buf, "%s\n", info.fw_version);
1040 }
1041
1042 static ssize_t show_hca(struct class_device *cdev, char *buf)
1043 {
1044         struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1045                                             ibdev.class_dev);
1046         struct ethtool_drvinfo info;
1047         struct net_device *lldev = dev->rdev.t3cdev_p->lldev;
1048
1049         PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
1050         lldev->ethtool_ops->get_drvinfo(lldev, &info);
1051         return sprintf(buf, "%s\n", info.driver);
1052 }
1053
1054 static ssize_t show_board(struct class_device *cdev, char *buf)
1055 {
1056         struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1057                                             ibdev.class_dev);
1058         PDBG("%s class dev 0x%p\n", __FUNCTION__, dev);
1059         return sprintf(buf, "%x.%x\n", dev->rdev.rnic_info.pdev->vendor,
1060                                        dev->rdev.rnic_info.pdev->device);
1061 }
1062
1063 static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1064 static CLASS_DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
1065 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1066 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
1067
1068 static struct class_device_attribute *iwch_class_attributes[] = {
1069         &class_device_attr_hw_rev,
1070         &class_device_attr_fw_ver,
1071         &class_device_attr_hca_type,
1072         &class_device_attr_board_id
1073 };
1074
1075 int iwch_register_device(struct iwch_dev *dev)
1076 {
1077         int ret;
1078         int i;
1079
1080         PDBG("%s iwch_dev %p\n", __FUNCTION__, dev);
1081         strlcpy(dev->ibdev.name, "cxgb3_%d", IB_DEVICE_NAME_MAX);
1082         memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
1083         memcpy(&dev->ibdev.node_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
1084         dev->ibdev.owner = THIS_MODULE;
1085         dev->device_cap_flags =
1086             (IB_DEVICE_ZERO_STAG |
1087              IB_DEVICE_SEND_W_INV | IB_DEVICE_MEM_WINDOW);
1088
1089         dev->ibdev.uverbs_cmd_mask =
1090             (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
1091             (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
1092             (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
1093             (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
1094             (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
1095             (1ull << IB_USER_VERBS_CMD_REG_MR) |
1096             (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
1097             (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1098             (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
1099             (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
1100             (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
1101             (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
1102             (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
1103             (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
1104             (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
1105             (1ull << IB_USER_VERBS_CMD_POST_SEND) |
1106             (1ull << IB_USER_VERBS_CMD_POST_RECV);
1107         dev->ibdev.node_type = RDMA_NODE_RNIC;
1108         memcpy(dev->ibdev.node_desc, IWCH_NODE_DESC, sizeof(IWCH_NODE_DESC));
1109         dev->ibdev.phys_port_cnt = dev->rdev.port_info.nports;
1110         dev->ibdev.dma_device = &(dev->rdev.rnic_info.pdev->dev);
1111         dev->ibdev.class_dev.dev = &(dev->rdev.rnic_info.pdev->dev);
1112         dev->ibdev.query_device = iwch_query_device;
1113         dev->ibdev.query_port = iwch_query_port;
1114         dev->ibdev.modify_port = iwch_modify_port;
1115         dev->ibdev.query_pkey = iwch_query_pkey;
1116         dev->ibdev.query_gid = iwch_query_gid;
1117         dev->ibdev.alloc_ucontext = iwch_alloc_ucontext;
1118         dev->ibdev.dealloc_ucontext = iwch_dealloc_ucontext;
1119         dev->ibdev.mmap = iwch_mmap;
1120         dev->ibdev.alloc_pd = iwch_allocate_pd;
1121         dev->ibdev.dealloc_pd = iwch_deallocate_pd;
1122         dev->ibdev.create_ah = iwch_ah_create;
1123         dev->ibdev.destroy_ah = iwch_ah_destroy;
1124         dev->ibdev.create_qp = iwch_create_qp;
1125         dev->ibdev.modify_qp = iwch_ib_modify_qp;
1126         dev->ibdev.destroy_qp = iwch_destroy_qp;
1127         dev->ibdev.create_cq = iwch_create_cq;
1128         dev->ibdev.destroy_cq = iwch_destroy_cq;
1129         dev->ibdev.resize_cq = iwch_resize_cq;
1130         dev->ibdev.poll_cq = iwch_poll_cq;
1131         dev->ibdev.get_dma_mr = iwch_get_dma_mr;
1132         dev->ibdev.reg_phys_mr = iwch_register_phys_mem;
1133         dev->ibdev.rereg_phys_mr = iwch_reregister_phys_mem;
1134         dev->ibdev.reg_user_mr = iwch_reg_user_mr;
1135         dev->ibdev.dereg_mr = iwch_dereg_mr;
1136         dev->ibdev.alloc_mw = iwch_alloc_mw;
1137         dev->ibdev.bind_mw = iwch_bind_mw;
1138         dev->ibdev.dealloc_mw = iwch_dealloc_mw;
1139
1140         dev->ibdev.attach_mcast = iwch_multicast_attach;
1141         dev->ibdev.detach_mcast = iwch_multicast_detach;
1142         dev->ibdev.process_mad = iwch_process_mad;
1143
1144         dev->ibdev.req_notify_cq = iwch_arm_cq;
1145         dev->ibdev.post_send = iwch_post_send;
1146         dev->ibdev.post_recv = iwch_post_receive;
1147
1148
1149         dev->ibdev.iwcm =
1150             (struct iw_cm_verbs *) kmalloc(sizeof(struct iw_cm_verbs),
1151                                            GFP_KERNEL);
1152         dev->ibdev.iwcm->connect = iwch_connect;
1153         dev->ibdev.iwcm->accept = iwch_accept_cr;
1154         dev->ibdev.iwcm->reject = iwch_reject_cr;
1155         dev->ibdev.iwcm->create_listen = iwch_create_listen;
1156         dev->ibdev.iwcm->destroy_listen = iwch_destroy_listen;
1157         dev->ibdev.iwcm->add_ref = iwch_qp_add_ref;
1158         dev->ibdev.iwcm->rem_ref = iwch_qp_rem_ref;
1159         dev->ibdev.iwcm->get_qp = iwch_get_qp;
1160
1161         ret = ib_register_device(&dev->ibdev);
1162         if (ret)
1163                 goto bail1;
1164
1165         for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i) {
1166                 ret = class_device_create_file(&dev->ibdev.class_dev,
1167                                                iwch_class_attributes[i]);
1168                 if (ret) {
1169                         goto bail2;
1170                 }
1171         }
1172         return 0;
1173 bail2:
1174         ib_unregister_device(&dev->ibdev);
1175 bail1:
1176         return ret;
1177 }
1178
1179 void iwch_unregister_device(struct iwch_dev *dev)
1180 {
1181         int i;
1182
1183         PDBG("%s iwch_dev %p\n", __FUNCTION__, dev);
1184         for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i)
1185                 class_device_remove_file(&dev->ibdev.class_dev,
1186                                          iwch_class_attributes[i]);
1187         ib_unregister_device(&dev->ibdev);
1188         return;
1189 }