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IB: Add CQ comp_vector support
[mirror_ubuntu-jammy-kernel.git] / drivers / infiniband / hw / cxgb3 / iwch_provider.c
CommitLineData
b038ced7
SW		 1/*
2 * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
b038ced7
SW		 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
58static 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
65static 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
71static int iwch_ah_destroy(struct ib_ah *ah)
72{
73 return -ENOSYS;
74}
75
76static int iwch_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
77{
78 return -ENOSYS;
79}
80
81static int iwch_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
82{
83 return -ENOSYS;
84}
85
86static 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
96static 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
110static 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
126static 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
f4fd0b22 142static struct ib_cq *iwch_create_cq(struct ib_device *ibdev, int entries, int vector,
b038ced7
SW		 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
227static 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
295static 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
326static 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;
aeb100e2 334 u64 addr;
b038ced7
SW		 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;
aeb100e2 349 addr = mm->addr;
b038ced7
SW		 350 kfree(mm);
351
aeb100e2
SW		 352 if ((addr >= rdev_p->rnic_info.udbell_physbase) &&
353 (addr < (rdev_p->rnic_info.udbell_physbase +
b038ced7
SW		 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,
aeb100e2 367 addr >> PAGE_SHIFT,
b038ced7
SW		 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,
aeb100e2 375 addr >> PAGE_SHIFT,
b038ced7
SW		 376 len, vma->vm_page_prot);
377 }
378
379 return ret;
380}
381
382static 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
395static 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
425static 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
449static 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
b038ced7
SW		 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
e64518f3 493 mhp->attr.perms = iwch_ib_to_tpt_access(acc);
b038ced7
SW		 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;
505err:
506 kfree(mhp);
507 return ERR_PTR(ret);
508
509}
510
511static 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;
b038ced7
SW		 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
b038ced7
SW		 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)
e64518f3 547 mh.attr.perms = iwch_ib_to_tpt_access(acc);
d6013471 548 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
b038ced7
SW		 549 ret = build_phys_page_list(buffer_list, num_phys_buf,
550 iova_start,
551 &total_size, &npages,
552 &shift, &page_list);
d6013471
SW		 553 if (ret)
554 return ret;
555 }
b038ced7
SW		 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)
e64518f3 565 mhp->attr.perms = iwch_ib_to_tpt_access(acc);
b038ced7
SW		 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
578static 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
b038ced7
SW		 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;
e64518f3 625 mhp->attr.perms = iwch_ib_to_tpt_access(acc);
b038ced7
SW		 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
650err:
651 kfree(mhp);
652 return ERR_PTR(err);
653}
654
655static 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
673static 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
702static 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
718static 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
2df50da0
SW		 728 attrs.next_state = IWCH_QP_STATE_ERROR;
729 iwch_modify_qp(rhp, qhp, IWCH_QP_ATTR_NEXT_STATE, &attrs, 0);
b038ced7
SW		 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
748static 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
1860cdf8
SW		 783 if (attrs->cap.max_inline_data > T3_MAX_INLINE)
784 return ERR_PTR(-EINVAL);
785
b038ced7
SW		 786 /*
787 * NOTE: The SQ and total WQ sizes don't need to be
788 * a power of two. However, all the code assumes
789 * they are. EG: Q_FREECNT() and friends.
790 */
791 sqsize = roundup_pow_of_two(attrs->cap.max_send_wr);
792 wqsize = roundup_pow_of_two(rqsize + sqsize);
793 PDBG("%s wqsize %d sqsize %d rqsize %d\n", __FUNCTION__,
794 wqsize, sqsize, rqsize);
795 qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
796 if (!qhp)
797 return ERR_PTR(-ENOMEM);
798 qhp->wq.size_log2 = ilog2(wqsize);
799 qhp->wq.rq_size_log2 = ilog2(rqsize);
800 qhp->wq.sq_size_log2 = ilog2(sqsize);
801 ucontext = pd->uobject ? to_iwch_ucontext(pd->uobject->context) : NULL;
802 if (cxio_create_qp(&rhp->rdev, !udata, &qhp->wq,
803 ucontext ? &ucontext->uctx : &rhp->rdev.uctx)) {
804 kfree(qhp);
805 return ERR_PTR(-ENOMEM);
806 }
807 attrs->cap.max_recv_wr = rqsize - 1;
808 attrs->cap.max_send_wr = sqsize;
809 qhp->rhp = rhp;
810 qhp->attr.pd = php->pdid;
811 qhp->attr.scq = ((struct iwch_cq *) attrs->send_cq)->cq.cqid;
812 qhp->attr.rcq = ((struct iwch_cq *) attrs->recv_cq)->cq.cqid;
813 qhp->attr.sq_num_entries = attrs->cap.max_send_wr;
814 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr;
815 qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
816 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
817 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge;
818 qhp->attr.state = IWCH_QP_STATE_IDLE;
819 qhp->attr.next_state = IWCH_QP_STATE_IDLE;
820
821 /*
822 * XXX - These don't get passed in from the openib user
823 * at create time. The CM sets them via a QP modify.
824 * Need to fix... I think the CM should
825 */
826 qhp->attr.enable_rdma_read = 1;
827 qhp->attr.enable_rdma_write = 1;
828 qhp->attr.enable_bind = 1;
829 qhp->attr.max_ord = 1;
830 qhp->attr.max_ird = 1;
831
832 spin_lock_init(&qhp->lock);
833 init_waitqueue_head(&qhp->wait);
834 atomic_set(&qhp->refcnt, 1);
835 insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.qpid);
836
837 if (udata) {
838
839 struct iwch_mm_entry *mm1, *mm2;
840
841 mm1 = kmalloc(sizeof *mm1, GFP_KERNEL);
842 if (!mm1) {
843 iwch_destroy_qp(&qhp->ibqp);
844 return ERR_PTR(-ENOMEM);
845 }
846
847 mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
848 if (!mm2) {
849 kfree(mm1);
850 iwch_destroy_qp(&qhp->ibqp);
851 return ERR_PTR(-ENOMEM);
852 }
853
854 uresp.qpid = qhp->wq.qpid;
855 uresp.size_log2 = qhp->wq.size_log2;
856 uresp.sq_size_log2 = qhp->wq.sq_size_log2;
857 uresp.rq_size_log2 = qhp->wq.rq_size_log2;
858 spin_lock(&ucontext->mmap_lock);
859 uresp.key = ucontext->key;
860 ucontext->key += PAGE_SIZE;
861 uresp.db_key = ucontext->key;
862 ucontext->key += PAGE_SIZE;
863 spin_unlock(&ucontext->mmap_lock);
864 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
865 kfree(mm1);
866 kfree(mm2);
867 iwch_destroy_qp(&qhp->ibqp);
868 return ERR_PTR(-EFAULT);
869 }
870 mm1->key = uresp.key;
871 mm1->addr = virt_to_phys(qhp->wq.queue);
872 mm1->len = PAGE_ALIGN(wqsize * sizeof (union t3_wr));
873 insert_mmap(ucontext, mm1);
874 mm2->key = uresp.db_key;
875 mm2->addr = qhp->wq.udb & PAGE_MASK;
876 mm2->len = PAGE_SIZE;
877 insert_mmap(ucontext, mm2);
878 }
879 qhp->ibqp.qp_num = qhp->wq.qpid;
880 init_timer(&(qhp->timer));
881 PDBG("%s sq_num_entries %d, rq_num_entries %d "
882 "qpid 0x%0x qhp %p dma_addr 0x%llx size %d\n",
883 __FUNCTION__, qhp->attr.sq_num_entries, qhp->attr.rq_num_entries,
884 qhp->wq.qpid, qhp, (unsigned long long) qhp->wq.dma_addr,
885 1 << qhp->wq.size_log2);
886 return &qhp->ibqp;
887}
888
889static int iwch_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
890 int attr_mask, struct ib_udata *udata)
891{
892 struct iwch_dev *rhp;
893 struct iwch_qp *qhp;
894 enum iwch_qp_attr_mask mask = 0;
895 struct iwch_qp_attributes attrs;
896
897 PDBG("%s ib_qp %p\n", __FUNCTION__, ibqp);
898
899 /* iwarp does not support the RTR state */
900 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR))
901 attr_mask &= ~IB_QP_STATE;
902
903 /* Make sure we still have something left to do */
904 if (!attr_mask)
905 return 0;
906
907 memset(&attrs, 0, sizeof attrs);
908 qhp = to_iwch_qp(ibqp);
909 rhp = qhp->rhp;
910
911 attrs.next_state = iwch_convert_state(attr->qp_state);
912 attrs.enable_rdma_read = (attr->qp_access_flags &
913 IB_ACCESS_REMOTE_READ) ? 1 : 0;
914 attrs.enable_rdma_write = (attr->qp_access_flags &
915 IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
916 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0;
917
918
919 mask |= (attr_mask & IB_QP_STATE) ? IWCH_QP_ATTR_NEXT_STATE : 0;
920 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ?
921 (IWCH_QP_ATTR_ENABLE_RDMA_READ |
922 IWCH_QP_ATTR_ENABLE_RDMA_WRITE |
923 IWCH_QP_ATTR_ENABLE_RDMA_BIND) : 0;
924
925 return iwch_modify_qp(rhp, qhp, mask, &attrs, 0);
926}
927
928void iwch_qp_add_ref(struct ib_qp *qp)
929{
930 PDBG("%s ib_qp %p\n", __FUNCTION__, qp);
931 atomic_inc(&(to_iwch_qp(qp)->refcnt));
932}
933
934void iwch_qp_rem_ref(struct ib_qp *qp)
935{
936 PDBG("%s ib_qp %p\n", __FUNCTION__, qp);
937 if (atomic_dec_and_test(&(to_iwch_qp(qp)->refcnt)))
938 wake_up(&(to_iwch_qp(qp)->wait));
939}
940
2b540355 941static struct ib_qp *iwch_get_qp(struct ib_device *dev, int qpn)
b038ced7
SW		 942{
943 PDBG("%s ib_dev %p qpn 0x%x\n", __FUNCTION__, dev, qpn);
944 return (struct ib_qp *)get_qhp(to_iwch_dev(dev), qpn);
945}
946
947
948static int iwch_query_pkey(struct ib_device *ibdev,
949 u8 port, u16 index, u16 * pkey)
950{
951 PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
952 *pkey = 0;
953 return 0;
954}
955
956static int iwch_query_gid(struct ib_device *ibdev, u8 port,
957 int index, union ib_gid *gid)
958{
959 struct iwch_dev *dev;
960
961 PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
962 __FUNCTION__, ibdev, port, index, gid);
963 dev = to_iwch_dev(ibdev);
964 BUG_ON(port == 0 || port > 2);
965 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
966 memcpy(&(gid->raw[0]), dev->rdev.port_info.lldevs[port-1]->dev_addr, 6);
967 return 0;
968}
969
970static int iwch_query_device(struct ib_device *ibdev,
971 struct ib_device_attr *props)
972{
973
974 struct iwch_dev *dev;
975 PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
976
977 dev = to_iwch_dev(ibdev);
978 memset(props, 0, sizeof *props);
979 memcpy(&props->sys_image_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
980 props->device_cap_flags = dev->device_cap_flags;
981 props->vendor_id = (u32)dev->rdev.rnic_info.pdev->vendor;
982 props->vendor_part_id = (u32)dev->rdev.rnic_info.pdev->device;
983 props->max_mr_size = ~0ull;
984 props->max_qp = dev->attr.max_qps;
985 props->max_qp_wr = dev->attr.max_wrs;
986 props->max_sge = dev->attr.max_sge_per_wr;
987 props->max_sge_rd = 1;
988 props->max_qp_rd_atom = dev->attr.max_rdma_reads_per_qp;
989 props->max_cq = dev->attr.max_cqs;
990 props->max_cqe = dev->attr.max_cqes_per_cq;
991 props->max_mr = dev->attr.max_mem_regs;
992 props->max_pd = dev->attr.max_pds;
993 props->local_ca_ack_delay = 0;
994
995 return 0;
996}
997
998static int iwch_query_port(struct ib_device *ibdev,
999 u8 port, struct ib_port_attr *props)
1000{
1001 PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
1002 props->max_mtu = IB_MTU_4096;
1003 props->lid = 0;
1004 props->lmc = 0;
1005 props->sm_lid = 0;
1006 props->sm_sl = 0;
1007 props->state = IB_PORT_ACTIVE;
1008 props->phys_state = 0;
1009 props->port_cap_flags =
1010 IB_PORT_CM_SUP |
1011 IB_PORT_SNMP_TUNNEL_SUP |
1012 IB_PORT_REINIT_SUP |
1013 IB_PORT_DEVICE_MGMT_SUP |
1014 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
1015 props->gid_tbl_len = 1;
1016 props->pkey_tbl_len = 1;
1017 props->qkey_viol_cntr = 0;
1018 props->active_width = 2;
1019 props->active_speed = 2;
1020 props->max_msg_sz = -1;
1021
1022 return 0;
1023}
1024
1025static ssize_t show_rev(struct class_device *cdev, char *buf)
1026{
1027 struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1028 ibdev.class_dev);
1029 PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
1030 return sprintf(buf, "%d\n", dev->rdev.t3cdev_p->type);
1031}
1032
1033static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
1034{
1035 struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1036 ibdev.class_dev);
1037 struct ethtool_drvinfo info;
1038 struct net_device *lldev = dev->rdev.t3cdev_p->lldev;
1039
1040 PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
1041 lldev->ethtool_ops->get_drvinfo(lldev, &info);
1042 return sprintf(buf, "%s\n", info.fw_version);
1043}
1044
1045static ssize_t show_hca(struct class_device *cdev, char *buf)
1046{
1047 struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1048 ibdev.class_dev);
1049 struct ethtool_drvinfo info;
1050 struct net_device *lldev = dev->rdev.t3cdev_p->lldev;
1051
1052 PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
1053 lldev->ethtool_ops->get_drvinfo(lldev, &info);
1054 return sprintf(buf, "%s\n", info.driver);
1055}
1056
1057static ssize_t show_board(struct class_device *cdev, char *buf)
1058{
1059 struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
1060 ibdev.class_dev);
1061 PDBG("%s class dev 0x%p\n", __FUNCTION__, dev);
1062 return sprintf(buf, "%x.%x\n", dev->rdev.rnic_info.pdev->vendor,
1063 dev->rdev.rnic_info.pdev->device);
1064}
1065
1066static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1067static CLASS_DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
1068static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1069static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
1070
1071static struct class_device_attribute *iwch_class_attributes[] = {
1072 &class_device_attr_hw_rev,
1073 &class_device_attr_fw_ver,
1074 &class_device_attr_hca_type,
1075 &class_device_attr_board_id
1076};
1077
1078int iwch_register_device(struct iwch_dev *dev)
1079{
1080 int ret;
1081 int i;
1082
1083 PDBG("%s iwch_dev %p\n", __FUNCTION__, dev);
1084 strlcpy(dev->ibdev.name, "cxgb3_%d", IB_DEVICE_NAME_MAX);
1085 memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
1086 memcpy(&dev->ibdev.node_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
1087 dev->ibdev.owner = THIS_MODULE;
1088 dev->device_cap_flags =
1089 (IB_DEVICE_ZERO_STAG |
1090 IB_DEVICE_SEND_W_INV | IB_DEVICE_MEM_WINDOW);
1091
1092 dev->ibdev.uverbs_cmd_mask =
1093 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
1094 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
1095 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
1096 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
1097 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
1098 (1ull << IB_USER_VERBS_CMD_REG_MR) |
1099 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
1100 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1101 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
1102 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
1103 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
1104 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
1105 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
1106 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
1107 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
1108 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
1109 (1ull << IB_USER_VERBS_CMD_POST_RECV);
1110 dev->ibdev.node_type = RDMA_NODE_RNIC;
1111 memcpy(dev->ibdev.node_desc, IWCH_NODE_DESC, sizeof(IWCH_NODE_DESC));
1112 dev->ibdev.phys_port_cnt = dev->rdev.port_info.nports;
f4fd0b22 1113 dev->ibdev.num_comp_vectors = 1;
b038ced7 1114 dev->ibdev.dma_device = &(dev->rdev.rnic_info.pdev->dev);
b038ced7
SW		 1115 dev->ibdev.query_device = iwch_query_device;
1116 dev->ibdev.query_port = iwch_query_port;
1117 dev->ibdev.modify_port = iwch_modify_port;
1118 dev->ibdev.query_pkey = iwch_query_pkey;
1119 dev->ibdev.query_gid = iwch_query_gid;
1120 dev->ibdev.alloc_ucontext = iwch_alloc_ucontext;
1121 dev->ibdev.dealloc_ucontext = iwch_dealloc_ucontext;
1122 dev->ibdev.mmap = iwch_mmap;
1123 dev->ibdev.alloc_pd = iwch_allocate_pd;
1124 dev->ibdev.dealloc_pd = iwch_deallocate_pd;
1125 dev->ibdev.create_ah = iwch_ah_create;
1126 dev->ibdev.destroy_ah = iwch_ah_destroy;
1127 dev->ibdev.create_qp = iwch_create_qp;
1128 dev->ibdev.modify_qp = iwch_ib_modify_qp;
1129 dev->ibdev.destroy_qp = iwch_destroy_qp;
1130 dev->ibdev.create_cq = iwch_create_cq;
1131 dev->ibdev.destroy_cq = iwch_destroy_cq;
1132 dev->ibdev.resize_cq = iwch_resize_cq;
1133 dev->ibdev.poll_cq = iwch_poll_cq;
1134 dev->ibdev.get_dma_mr = iwch_get_dma_mr;
1135 dev->ibdev.reg_phys_mr = iwch_register_phys_mem;
1136 dev->ibdev.rereg_phys_mr = iwch_reregister_phys_mem;
1137 dev->ibdev.reg_user_mr = iwch_reg_user_mr;
1138 dev->ibdev.dereg_mr = iwch_dereg_mr;
1139 dev->ibdev.alloc_mw = iwch_alloc_mw;
1140 dev->ibdev.bind_mw = iwch_bind_mw;
1141 dev->ibdev.dealloc_mw = iwch_dealloc_mw;
1142
1143 dev->ibdev.attach_mcast = iwch_multicast_attach;
1144 dev->ibdev.detach_mcast = iwch_multicast_detach;
1145 dev->ibdev.process_mad = iwch_process_mad;
1146
1147 dev->ibdev.req_notify_cq = iwch_arm_cq;
1148 dev->ibdev.post_send = iwch_post_send;
1149 dev->ibdev.post_recv = iwch_post_receive;
1150
1151
1152 dev->ibdev.iwcm =
1153 (struct iw_cm_verbs *) kmalloc(sizeof(struct iw_cm_verbs),
1154 GFP_KERNEL);
1155 dev->ibdev.iwcm->connect = iwch_connect;
1156 dev->ibdev.iwcm->accept = iwch_accept_cr;
1157 dev->ibdev.iwcm->reject = iwch_reject_cr;
1158 dev->ibdev.iwcm->create_listen = iwch_create_listen;
1159 dev->ibdev.iwcm->destroy_listen = iwch_destroy_listen;
1160 dev->ibdev.iwcm->add_ref = iwch_qp_add_ref;
1161 dev->ibdev.iwcm->rem_ref = iwch_qp_rem_ref;
1162 dev->ibdev.iwcm->get_qp = iwch_get_qp;
1163
1164 ret = ib_register_device(&dev->ibdev);
1165 if (ret)
1166 goto bail1;
1167
1168 for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i) {
1169 ret = class_device_create_file(&dev->ibdev.class_dev,
1170 iwch_class_attributes[i]);
1171 if (ret) {
1172 goto bail2;
1173 }
1174 }
1175 return 0;
1176bail2:
1177 ib_unregister_device(&dev->ibdev);
1178bail1:
1179 return ret;
1180}
1181
1182void iwch_unregister_device(struct iwch_dev *dev)
1183{
1184 int i;
1185
1186 PDBG("%s iwch_dev %p\n", __FUNCTION__, dev);
1187 for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i)
1188 class_device_remove_file(&dev->ibdev.class_dev,
1189 iwch_class_attributes[i]);
1190 ib_unregister_device(&dev->ibdev);
1191 return;
1192}
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