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/sched.h>
41 #include <linux/spinlock.h>
42 #include <linux/ethtool.h>
43 #include <linux/rtnetlink.h>
44 #include <linux/inetdevice.h>
45 #include <linux/slab.h>
46
47 #include <asm/io.h>
48 #include <asm/irq.h>
49 #include <asm/byteorder.h>
50
51 #include <rdma/iw_cm.h>
52 #include <rdma/ib_verbs.h>
53 #include <rdma/ib_smi.h>
54 #include <rdma/ib_umem.h>
55 #include <rdma/ib_user_verbs.h>
56
57 #include "cxio_hal.h"
58 #include "iwch.h"
59 #include "iwch_provider.h"
60 #include "iwch_cm.h"
61 #include "iwch_user.h"
62 #include "common.h"
63
iwch_ah_create(struct ib_pd * pd,struct ib_ah_attr * ah_attr)64 static struct ib_ah *iwch_ah_create(struct ib_pd *pd,
65 struct ib_ah_attr *ah_attr)
66 {
67 return ERR_PTR(-ENOSYS);
68 }
69
iwch_ah_destroy(struct ib_ah * ah)70 static int iwch_ah_destroy(struct ib_ah *ah)
71 {
72 return -ENOSYS;
73 }
74
iwch_multicast_attach(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)75 static int iwch_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
76 {
77 return -ENOSYS;
78 }
79
iwch_multicast_detach(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)80 static int iwch_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
81 {
82 return -ENOSYS;
83 }
84
iwch_process_mad(struct ib_device * ibdev,int mad_flags,u8 port_num,struct ib_wc * in_wc,struct ib_grh * in_grh,struct ib_mad * in_mad,struct ib_mad * out_mad)85 static int iwch_process_mad(struct ib_device *ibdev,
86 int mad_flags,
87 u8 port_num,
88 struct ib_wc *in_wc,
89 struct ib_grh *in_grh,
90 struct ib_mad *in_mad, struct ib_mad *out_mad)
91 {
92 return -ENOSYS;
93 }
94
iwch_dealloc_ucontext(struct ib_ucontext * context)95 static int iwch_dealloc_ucontext(struct ib_ucontext *context)
96 {
97 struct iwch_dev *rhp = to_iwch_dev(context->device);
98 struct iwch_ucontext *ucontext = to_iwch_ucontext(context);
99 struct iwch_mm_entry *mm, *tmp;
100
101 PDBG("%s context %p\n", __func__, context);
102 list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
103 kfree(mm);
104 cxio_release_ucontext(&rhp->rdev, &ucontext->uctx);
105 kfree(ucontext);
106 return 0;
107 }
108
iwch_alloc_ucontext(struct ib_device * ibdev,struct ib_udata * udata)109 static struct ib_ucontext *iwch_alloc_ucontext(struct ib_device *ibdev,
110 struct ib_udata *udata)
111 {
112 struct iwch_ucontext *context;
113 struct iwch_dev *rhp = to_iwch_dev(ibdev);
114
115 PDBG("%s ibdev %p\n", __func__, ibdev);
116 context = kzalloc(sizeof(*context), GFP_KERNEL);
117 if (!context)
118 return ERR_PTR(-ENOMEM);
119 cxio_init_ucontext(&rhp->rdev, &context->uctx);
120 INIT_LIST_HEAD(&context->mmaps);
121 spin_lock_init(&context->mmap_lock);
122 return &context->ibucontext;
123 }
124
iwch_destroy_cq(struct ib_cq * ib_cq)125 static int iwch_destroy_cq(struct ib_cq *ib_cq)
126 {
127 struct iwch_cq *chp;
128
129 PDBG("%s ib_cq %p\n", __func__, ib_cq);
130 chp = to_iwch_cq(ib_cq);
131
132 remove_handle(chp->rhp, &chp->rhp->cqidr, chp->cq.cqid);
133 atomic_dec(&chp->refcnt);
134 wait_event(chp->wait, !atomic_read(&chp->refcnt));
135
136 cxio_destroy_cq(&chp->rhp->rdev, &chp->cq);
137 kfree(chp);
138 return 0;
139 }
140
iwch_create_cq(struct ib_device * ibdev,int entries,int vector,struct ib_ucontext * ib_context,struct ib_udata * udata)141 static struct ib_cq *iwch_create_cq(struct ib_device *ibdev, int entries, int vector,
142 struct ib_ucontext *ib_context,
143 struct ib_udata *udata)
144 {
145 struct iwch_dev *rhp;
146 struct iwch_cq *chp;
147 struct iwch_create_cq_resp uresp;
148 struct iwch_create_cq_req ureq;
149 struct iwch_ucontext *ucontext = NULL;
150 static int warned;
151 size_t resplen;
152
153 PDBG("%s ib_dev %p entries %d\n", __func__, 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, !ucontext)) {
187 kfree(chp);
188 return ERR_PTR(-ENOMEM);
189 }
190 chp->rhp = rhp;
191 chp->ibcq.cqe = 1 << chp->cq.size_log2;
192 spin_lock_init(&chp->lock);
193 spin_lock_init(&chp->comp_handler_lock);
194 atomic_set(&chp->refcnt, 1);
195 init_waitqueue_head(&chp->wait);
196 if (insert_handle(rhp, &rhp->cqidr, chp, chp->cq.cqid)) {
197 cxio_destroy_cq(&chp->rhp->rdev, &chp->cq);
198 kfree(chp);
199 return ERR_PTR(-ENOMEM);
200 }
201
202 if (ucontext) {
203 struct iwch_mm_entry *mm;
204
205 mm = kmalloc(sizeof *mm, GFP_KERNEL);
206 if (!mm) {
207 iwch_destroy_cq(&chp->ibcq);
208 return ERR_PTR(-ENOMEM);
209 }
210 uresp.cqid = chp->cq.cqid;
211 uresp.size_log2 = chp->cq.size_log2;
212 spin_lock(&ucontext->mmap_lock);
213 uresp.key = ucontext->key;
214 ucontext->key += PAGE_SIZE;
215 spin_unlock(&ucontext->mmap_lock);
216 mm->key = uresp.key;
217 mm->addr = virt_to_phys(chp->cq.queue);
218 if (udata->outlen < sizeof uresp) {
219 if (!warned++)
220 printk(KERN_WARNING MOD "Warning - "
221 "downlevel libcxgb3 (non-fatal).\n");
222 mm->len = PAGE_ALIGN((1UL << uresp.size_log2) *
223 sizeof(struct t3_cqe));
224 resplen = sizeof(struct iwch_create_cq_resp_v0);
225 } else {
226 mm->len = PAGE_ALIGN(((1UL << uresp.size_log2) + 1) *
227 sizeof(struct t3_cqe));
228 uresp.memsize = mm->len;
229 resplen = sizeof uresp;
230 }
231 if (ib_copy_to_udata(udata, &uresp, resplen)) {
232 kfree(mm);
233 iwch_destroy_cq(&chp->ibcq);
234 return ERR_PTR(-EFAULT);
235 }
236 insert_mmap(ucontext, mm);
237 }
238 PDBG("created cqid 0x%0x chp %p size 0x%0x, dma_addr 0x%0llx\n",
239 chp->cq.cqid, chp, (1 << chp->cq.size_log2),
240 (unsigned long long) chp->cq.dma_addr);
241 return &chp->ibcq;
242 }
243
iwch_resize_cq(struct ib_cq * cq,int cqe,struct ib_udata * udata)244 static int iwch_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata)
245 {
246 #ifdef notyet
247 struct iwch_cq *chp = to_iwch_cq(cq);
248 struct t3_cq oldcq, newcq;
249 int ret;
250
251 PDBG("%s ib_cq %p cqe %d\n", __func__, cq, cqe);
252
253 /* We don't downsize... */
254 if (cqe <= cq->cqe)
255 return 0;
256
257 /* create new t3_cq with new size */
258 cqe = roundup_pow_of_two(cqe+1);
259 newcq.size_log2 = ilog2(cqe);
260
261 /* Dont allow resize to less than the current wce count */
262 if (cqe < Q_COUNT(chp->cq.rptr, chp->cq.wptr)) {
263 return -ENOMEM;
264 }
265
266 /* Quiesce all QPs using this CQ */
267 ret = iwch_quiesce_qps(chp);
268 if (ret) {
269 return ret;
270 }
271
272 ret = cxio_create_cq(&chp->rhp->rdev, &newcq);
273 if (ret) {
274 return ret;
275 }
276
277 /* copy CQEs */
278 memcpy(newcq.queue, chp->cq.queue, (1 << chp->cq.size_log2) *
279 sizeof(struct t3_cqe));
280
281 /* old iwch_qp gets new t3_cq but keeps old cqid */
282 oldcq = chp->cq;
283 chp->cq = newcq;
284 chp->cq.cqid = oldcq.cqid;
285
286 /* resize new t3_cq to update the HW context */
287 ret = cxio_resize_cq(&chp->rhp->rdev, &chp->cq);
288 if (ret) {
289 chp->cq = oldcq;
290 return ret;
291 }
292 chp->ibcq.cqe = (1<<chp->cq.size_log2) - 1;
293
294 /* destroy old t3_cq */
295 oldcq.cqid = newcq.cqid;
296 ret = cxio_destroy_cq(&chp->rhp->rdev, &oldcq);
297 if (ret) {
298 printk(KERN_ERR MOD "%s - cxio_destroy_cq failed %d\n",
299 __func__, ret);
300 }
301
302 /* add user hooks here */
303
304 /* resume qps */
305 ret = iwch_resume_qps(chp);
306 return ret;
307 #else
308 return -ENOSYS;
309 #endif
310 }
311
iwch_arm_cq(struct ib_cq * ibcq,enum ib_cq_notify_flags flags)312 static int iwch_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
313 {
314 struct iwch_dev *rhp;
315 struct iwch_cq *chp;
316 enum t3_cq_opcode cq_op;
317 int err;
318 unsigned long flag;
319 u32 rptr;
320
321 chp = to_iwch_cq(ibcq);
322 rhp = chp->rhp;
323 if ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
324 cq_op = CQ_ARM_SE;
325 else
326 cq_op = CQ_ARM_AN;
327 if (chp->user_rptr_addr) {
328 if (get_user(rptr, chp->user_rptr_addr))
329 return -EFAULT;
330 spin_lock_irqsave(&chp->lock, flag);
331 chp->cq.rptr = rptr;
332 } else
333 spin_lock_irqsave(&chp->lock, flag);
334 PDBG("%s rptr 0x%x\n", __func__, chp->cq.rptr);
335 err = cxio_hal_cq_op(&rhp->rdev, &chp->cq, cq_op, 0);
336 spin_unlock_irqrestore(&chp->lock, flag);
337 if (err < 0)
338 printk(KERN_ERR MOD "Error %d rearming CQID 0x%x\n", err,
339 chp->cq.cqid);
340 if (err > 0 && !(flags & IB_CQ_REPORT_MISSED_EVENTS))
341 err = 0;
342 return err;
343 }
344
iwch_mmap(struct ib_ucontext * context,struct vm_area_struct * vma)345 static int iwch_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
346 {
347 int len = vma->vm_end - vma->vm_start;
348 u32 key = vma->vm_pgoff << PAGE_SHIFT;
349 struct cxio_rdev *rdev_p;
350 int ret = 0;
351 struct iwch_mm_entry *mm;
352 struct iwch_ucontext *ucontext;
353 u64 addr;
354
355 PDBG("%s pgoff 0x%lx key 0x%x len %d\n", __func__, vma->vm_pgoff,
356 key, len);
357
358 if (vma->vm_start & (PAGE_SIZE-1)) {
359 return -EINVAL;
360 }
361
362 rdev_p = &(to_iwch_dev(context->device)->rdev);
363 ucontext = to_iwch_ucontext(context);
364
365 mm = remove_mmap(ucontext, key, len);
366 if (!mm)
367 return -EINVAL;
368 addr = mm->addr;
369 kfree(mm);
370
371 if ((addr >= rdev_p->rnic_info.udbell_physbase) &&
372 (addr < (rdev_p->rnic_info.udbell_physbase +
373 rdev_p->rnic_info.udbell_len))) {
374
375 /*
376 * Map T3 DB register.
377 */
378 if (vma->vm_flags & VM_READ) {
379 return -EPERM;
380 }
381
382 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
383 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
384 vma->vm_flags &= ~VM_MAYREAD;
385 ret = io_remap_pfn_range(vma, vma->vm_start,
386 addr >> PAGE_SHIFT,
387 len, vma->vm_page_prot);
388 } else {
389
390 /*
391 * Map WQ or CQ contig dma memory...
392 */
393 ret = remap_pfn_range(vma, vma->vm_start,
394 addr >> PAGE_SHIFT,
395 len, vma->vm_page_prot);
396 }
397
398 return ret;
399 }
400
iwch_deallocate_pd(struct ib_pd * pd)401 static int iwch_deallocate_pd(struct ib_pd *pd)
402 {
403 struct iwch_dev *rhp;
404 struct iwch_pd *php;
405
406 php = to_iwch_pd(pd);
407 rhp = php->rhp;
408 PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid);
409 cxio_hal_put_pdid(rhp->rdev.rscp, php->pdid);
410 kfree(php);
411 return 0;
412 }
413
iwch_allocate_pd(struct ib_device * ibdev,struct ib_ucontext * context,struct ib_udata * udata)414 static struct ib_pd *iwch_allocate_pd(struct ib_device *ibdev,
415 struct ib_ucontext *context,
416 struct ib_udata *udata)
417 {
418 struct iwch_pd *php;
419 u32 pdid;
420 struct iwch_dev *rhp;
421
422 PDBG("%s ibdev %p\n", __func__, ibdev);
423 rhp = (struct iwch_dev *) ibdev;
424 pdid = cxio_hal_get_pdid(rhp->rdev.rscp);
425 if (!pdid)
426 return ERR_PTR(-EINVAL);
427 php = kzalloc(sizeof(*php), GFP_KERNEL);
428 if (!php) {
429 cxio_hal_put_pdid(rhp->rdev.rscp, pdid);
430 return ERR_PTR(-ENOMEM);
431 }
432 php->pdid = pdid;
433 php->rhp = rhp;
434 if (context) {
435 if (ib_copy_to_udata(udata, &php->pdid, sizeof (__u32))) {
436 iwch_deallocate_pd(&php->ibpd);
437 return ERR_PTR(-EFAULT);
438 }
439 }
440 PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php);
441 return &php->ibpd;
442 }
443
iwch_dereg_mr(struct ib_mr * ib_mr)444 static int iwch_dereg_mr(struct ib_mr *ib_mr)
445 {
446 struct iwch_dev *rhp;
447 struct iwch_mr *mhp;
448 u32 mmid;
449
450 PDBG("%s ib_mr %p\n", __func__, ib_mr);
451 /* There can be no memory windows */
452 if (atomic_read(&ib_mr->usecnt))
453 return -EINVAL;
454
455 mhp = to_iwch_mr(ib_mr);
456 rhp = mhp->rhp;
457 mmid = mhp->attr.stag >> 8;
458 cxio_dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
459 mhp->attr.pbl_addr);
460 iwch_free_pbl(mhp);
461 remove_handle(rhp, &rhp->mmidr, mmid);
462 if (mhp->kva)
463 kfree((void *) (unsigned long) mhp->kva);
464 if (mhp->umem)
465 ib_umem_release(mhp->umem);
466 PDBG("%s mmid 0x%x ptr %p\n", __func__, mmid, mhp);
467 kfree(mhp);
468 return 0;
469 }
470
iwch_register_phys_mem(struct ib_pd * pd,struct ib_phys_buf * buffer_list,int num_phys_buf,int acc,u64 * iova_start)471 static struct ib_mr *iwch_register_phys_mem(struct ib_pd *pd,
472 struct ib_phys_buf *buffer_list,
473 int num_phys_buf,
474 int acc,
475 u64 *iova_start)
476 {
477 __be64 *page_list;
478 int shift;
479 u64 total_size;
480 int npages;
481 struct iwch_dev *rhp;
482 struct iwch_pd *php;
483 struct iwch_mr *mhp;
484 int ret;
485
486 PDBG("%s ib_pd %p\n", __func__, pd);
487 php = to_iwch_pd(pd);
488 rhp = php->rhp;
489
490 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
491 if (!mhp)
492 return ERR_PTR(-ENOMEM);
493
494 mhp->rhp = rhp;
495
496 /* First check that we have enough alignment */
497 if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK)) {
498 ret = -EINVAL;
499 goto err;
500 }
501
502 if (num_phys_buf > 1 &&
503 ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK)) {
504 ret = -EINVAL;
505 goto err;
506 }
507
508 ret = build_phys_page_list(buffer_list, num_phys_buf, iova_start,
509 &total_size, &npages, &shift, &page_list);
510 if (ret)
511 goto err;
512
513 ret = iwch_alloc_pbl(mhp, npages);
514 if (ret) {
515 kfree(page_list);
516 goto err_pbl;
517 }
518
519 ret = iwch_write_pbl(mhp, page_list, npages, 0);
520 kfree(page_list);
521 if (ret)
522 goto err_pbl;
523
524 mhp->attr.pdid = php->pdid;
525 mhp->attr.zbva = 0;
526
527 mhp->attr.perms = iwch_ib_to_tpt_access(acc);
528 mhp->attr.va_fbo = *iova_start;
529 mhp->attr.page_size = shift - 12;
530
531 mhp->attr.len = (u32) total_size;
532 mhp->attr.pbl_size = npages;
533 ret = iwch_register_mem(rhp, php, mhp, shift);
534 if (ret)
535 goto err_pbl;
536
537 return &mhp->ibmr;
538
539 err_pbl:
540 iwch_free_pbl(mhp);
541
542 err:
543 kfree(mhp);
544 return ERR_PTR(ret);
545
546 }
547
iwch_reregister_phys_mem(struct ib_mr * mr,int mr_rereg_mask,struct ib_pd * pd,struct ib_phys_buf * buffer_list,int num_phys_buf,int acc,u64 * iova_start)548 static int iwch_reregister_phys_mem(struct ib_mr *mr,
549 int mr_rereg_mask,
550 struct ib_pd *pd,
551 struct ib_phys_buf *buffer_list,
552 int num_phys_buf,
553 int acc, u64 * iova_start)
554 {
555
556 struct iwch_mr mh, *mhp;
557 struct iwch_pd *php;
558 struct iwch_dev *rhp;
559 __be64 *page_list = NULL;
560 int shift = 0;
561 u64 total_size;
562 int npages = 0;
563 int ret;
564
565 PDBG("%s ib_mr %p ib_pd %p\n", __func__, mr, pd);
566
567 /* There can be no memory windows */
568 if (atomic_read(&mr->usecnt))
569 return -EINVAL;
570
571 mhp = to_iwch_mr(mr);
572 rhp = mhp->rhp;
573 php = to_iwch_pd(mr->pd);
574
575 /* make sure we are on the same adapter */
576 if (rhp != php->rhp)
577 return -EINVAL;
578
579 memcpy(&mh, mhp, sizeof *mhp);
580
581 if (mr_rereg_mask & IB_MR_REREG_PD)
582 php = to_iwch_pd(pd);
583 if (mr_rereg_mask & IB_MR_REREG_ACCESS)
584 mh.attr.perms = iwch_ib_to_tpt_access(acc);
585 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
586 ret = build_phys_page_list(buffer_list, num_phys_buf,
587 iova_start,
588 &total_size, &npages,
589 &shift, &page_list);
590 if (ret)
591 return ret;
592 }
593
594 ret = iwch_reregister_mem(rhp, php, &mh, shift, npages);
595 kfree(page_list);
596 if (ret) {
597 return ret;
598 }
599 if (mr_rereg_mask & IB_MR_REREG_PD)
600 mhp->attr.pdid = php->pdid;
601 if (mr_rereg_mask & IB_MR_REREG_ACCESS)
602 mhp->attr.perms = iwch_ib_to_tpt_access(acc);
603 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
604 mhp->attr.zbva = 0;
605 mhp->attr.va_fbo = *iova_start;
606 mhp->attr.page_size = shift - 12;
607 mhp->attr.len = (u32) total_size;
608 mhp->attr.pbl_size = npages;
609 }
610
611 return 0;
612 }
613
614
iwch_reg_user_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt,int acc,struct ib_udata * udata)615 static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
616 u64 virt, int acc, struct ib_udata *udata)
617 {
618 __be64 *pages;
619 int shift, n, len;
620 int i, j, k;
621 int err = 0;
622 struct ib_umem_chunk *chunk;
623 struct iwch_dev *rhp;
624 struct iwch_pd *php;
625 struct iwch_mr *mhp;
626 struct iwch_reg_user_mr_resp uresp;
627
628 PDBG("%s ib_pd %p\n", __func__, pd);
629
630 php = to_iwch_pd(pd);
631 rhp = php->rhp;
632 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
633 if (!mhp)
634 return ERR_PTR(-ENOMEM);
635
636 mhp->rhp = rhp;
637
638 mhp->umem = ib_umem_get(pd->uobject->context, start, length, acc, 0);
639 if (IS_ERR(mhp->umem)) {
640 err = PTR_ERR(mhp->umem);
641 kfree(mhp);
642 return ERR_PTR(err);
643 }
644
645 shift = ffs(mhp->umem->page_size) - 1;
646
647 n = 0;
648 list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
649 n += chunk->nents;
650
651 err = iwch_alloc_pbl(mhp, n);
652 if (err)
653 goto err;
654
655 pages = (__be64 *) __get_free_page(GFP_KERNEL);
656 if (!pages) {
657 err = -ENOMEM;
658 goto err_pbl;
659 }
660
661 i = n = 0;
662
663 list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
664 for (j = 0; j < chunk->nmap; ++j) {
665 len = sg_dma_len(&chunk->page_list[j]) >> shift;
666 for (k = 0; k < len; ++k) {
667 pages[i++] = cpu_to_be64(sg_dma_address(
668 &chunk->page_list[j]) +
669 mhp->umem->page_size * k);
670 if (i == PAGE_SIZE / sizeof *pages) {
671 err = iwch_write_pbl(mhp, pages, i, n);
672 if (err)
673 goto pbl_done;
674 n += i;
675 i = 0;
676 }
677 }
678 }
679
680 if (i)
681 err = iwch_write_pbl(mhp, pages, i, n);
682
683 pbl_done:
684 free_page((unsigned long) pages);
685 if (err)
686 goto err_pbl;
687
688 mhp->attr.pdid = php->pdid;
689 mhp->attr.zbva = 0;
690 mhp->attr.perms = iwch_ib_to_tpt_access(acc);
691 mhp->attr.va_fbo = virt;
692 mhp->attr.page_size = shift - 12;
693 mhp->attr.len = (u32) length;
694
695 err = iwch_register_mem(rhp, php, mhp, shift);
696 if (err)
697 goto err_pbl;
698
699 if (udata && !t3a_device(rhp)) {
700 uresp.pbl_addr = (mhp->attr.pbl_addr -
701 rhp->rdev.rnic_info.pbl_base) >> 3;
702 PDBG("%s user resp pbl_addr 0x%x\n", __func__,
703 uresp.pbl_addr);
704
705 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
706 iwch_dereg_mr(&mhp->ibmr);
707 err = -EFAULT;
708 goto err;
709 }
710 }
711
712 return &mhp->ibmr;
713
714 err_pbl:
715 iwch_free_pbl(mhp);
716
717 err:
718 ib_umem_release(mhp->umem);
719 kfree(mhp);
720 return ERR_PTR(err);
721 }
722
iwch_get_dma_mr(struct ib_pd * pd,int acc)723 static struct ib_mr *iwch_get_dma_mr(struct ib_pd *pd, int acc)
724 {
725 struct ib_phys_buf bl;
726 u64 kva;
727 struct ib_mr *ibmr;
728
729 PDBG("%s ib_pd %p\n", __func__, pd);
730
731 /*
732 * T3 only supports 32 bits of size.
733 */
734 bl.size = 0xffffffff;
735 bl.addr = 0;
736 kva = 0;
737 ibmr = iwch_register_phys_mem(pd, &bl, 1, acc, &kva);
738 return ibmr;
739 }
740
iwch_alloc_mw(struct ib_pd * pd,enum ib_mw_type type)741 static struct ib_mw *iwch_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
742 {
743 struct iwch_dev *rhp;
744 struct iwch_pd *php;
745 struct iwch_mw *mhp;
746 u32 mmid;
747 u32 stag = 0;
748 int ret;
749
750 if (type != IB_MW_TYPE_1)
751 return ERR_PTR(-EINVAL);
752
753 php = to_iwch_pd(pd);
754 rhp = php->rhp;
755 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
756 if (!mhp)
757 return ERR_PTR(-ENOMEM);
758 ret = cxio_allocate_window(&rhp->rdev, &stag, php->pdid);
759 if (ret) {
760 kfree(mhp);
761 return ERR_PTR(ret);
762 }
763 mhp->rhp = rhp;
764 mhp->attr.pdid = php->pdid;
765 mhp->attr.type = TPT_MW;
766 mhp->attr.stag = stag;
767 mmid = (stag) >> 8;
768 mhp->ibmw.rkey = stag;
769 if (insert_handle(rhp, &rhp->mmidr, mhp, mmid)) {
770 cxio_deallocate_window(&rhp->rdev, mhp->attr.stag);
771 kfree(mhp);
772 return ERR_PTR(-ENOMEM);
773 }
774 PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __func__, mmid, mhp, stag);
775 return &(mhp->ibmw);
776 }
777
iwch_dealloc_mw(struct ib_mw * mw)778 static int iwch_dealloc_mw(struct ib_mw *mw)
779 {
780 struct iwch_dev *rhp;
781 struct iwch_mw *mhp;
782 u32 mmid;
783
784 mhp = to_iwch_mw(mw);
785 rhp = mhp->rhp;
786 mmid = (mw->rkey) >> 8;
787 cxio_deallocate_window(&rhp->rdev, mhp->attr.stag);
788 remove_handle(rhp, &rhp->mmidr, mmid);
789 PDBG("%s ib_mw %p mmid 0x%x ptr %p\n", __func__, mw, mmid, mhp);
790 kfree(mhp);
791 return 0;
792 }
793
iwch_alloc_fast_reg_mr(struct ib_pd * pd,int pbl_depth)794 static struct ib_mr *iwch_alloc_fast_reg_mr(struct ib_pd *pd, int pbl_depth)
795 {
796 struct iwch_dev *rhp;
797 struct iwch_pd *php;
798 struct iwch_mr *mhp;
799 u32 mmid;
800 u32 stag = 0;
801 int ret = 0;
802
803 php = to_iwch_pd(pd);
804 rhp = php->rhp;
805 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
806 if (!mhp)
807 goto err;
808
809 mhp->rhp = rhp;
810 ret = iwch_alloc_pbl(mhp, pbl_depth);
811 if (ret)
812 goto err1;
813 mhp->attr.pbl_size = pbl_depth;
814 ret = cxio_allocate_stag(&rhp->rdev, &stag, php->pdid,
815 mhp->attr.pbl_size, mhp->attr.pbl_addr);
816 if (ret)
817 goto err2;
818 mhp->attr.pdid = php->pdid;
819 mhp->attr.type = TPT_NON_SHARED_MR;
820 mhp->attr.stag = stag;
821 mhp->attr.state = 1;
822 mmid = (stag) >> 8;
823 mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
824 if (insert_handle(rhp, &rhp->mmidr, mhp, mmid))
825 goto err3;
826
827 PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __func__, mmid, mhp, stag);
828 return &(mhp->ibmr);
829 err3:
830 cxio_dereg_mem(&rhp->rdev, stag, mhp->attr.pbl_size,
831 mhp->attr.pbl_addr);
832 err2:
833 iwch_free_pbl(mhp);
834 err1:
835 kfree(mhp);
836 err:
837 return ERR_PTR(ret);
838 }
839
iwch_alloc_fastreg_pbl(struct ib_device * device,int page_list_len)840 static struct ib_fast_reg_page_list *iwch_alloc_fastreg_pbl(
841 struct ib_device *device,
842 int page_list_len)
843 {
844 struct ib_fast_reg_page_list *page_list;
845
846 page_list = kmalloc(sizeof *page_list + page_list_len * sizeof(u64),
847 GFP_KERNEL);
848 if (!page_list)
849 return ERR_PTR(-ENOMEM);
850
851 page_list->page_list = (u64 *)(page_list + 1);
852 page_list->max_page_list_len = page_list_len;
853
854 return page_list;
855 }
856
iwch_free_fastreg_pbl(struct ib_fast_reg_page_list * page_list)857 static void iwch_free_fastreg_pbl(struct ib_fast_reg_page_list *page_list)
858 {
859 kfree(page_list);
860 }
861
iwch_destroy_qp(struct ib_qp * ib_qp)862 static int iwch_destroy_qp(struct ib_qp *ib_qp)
863 {
864 struct iwch_dev *rhp;
865 struct iwch_qp *qhp;
866 struct iwch_qp_attributes attrs;
867 struct iwch_ucontext *ucontext;
868
869 qhp = to_iwch_qp(ib_qp);
870 rhp = qhp->rhp;
871
872 attrs.next_state = IWCH_QP_STATE_ERROR;
873 iwch_modify_qp(rhp, qhp, IWCH_QP_ATTR_NEXT_STATE, &attrs, 0);
874 wait_event(qhp->wait, !qhp->ep);
875
876 remove_handle(rhp, &rhp->qpidr, qhp->wq.qpid);
877
878 atomic_dec(&qhp->refcnt);
879 wait_event(qhp->wait, !atomic_read(&qhp->refcnt));
880
881 ucontext = ib_qp->uobject ? to_iwch_ucontext(ib_qp->uobject->context)
882 : NULL;
883 cxio_destroy_qp(&rhp->rdev, &qhp->wq,
884 ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
885
886 PDBG("%s ib_qp %p qpid 0x%0x qhp %p\n", __func__,
887 ib_qp, qhp->wq.qpid, qhp);
888 kfree(qhp);
889 return 0;
890 }
891
iwch_create_qp(struct ib_pd * pd,struct ib_qp_init_attr * attrs,struct ib_udata * udata)892 static struct ib_qp *iwch_create_qp(struct ib_pd *pd,
893 struct ib_qp_init_attr *attrs,
894 struct ib_udata *udata)
895 {
896 struct iwch_dev *rhp;
897 struct iwch_qp *qhp;
898 struct iwch_pd *php;
899 struct iwch_cq *schp;
900 struct iwch_cq *rchp;
901 struct iwch_create_qp_resp uresp;
902 int wqsize, sqsize, rqsize;
903 struct iwch_ucontext *ucontext;
904
905 PDBG("%s ib_pd %p\n", __func__, pd);
906 if (attrs->qp_type != IB_QPT_RC)
907 return ERR_PTR(-EINVAL);
908 php = to_iwch_pd(pd);
909 rhp = php->rhp;
910 schp = get_chp(rhp, ((struct iwch_cq *) attrs->send_cq)->cq.cqid);
911 rchp = get_chp(rhp, ((struct iwch_cq *) attrs->recv_cq)->cq.cqid);
912 if (!schp || !rchp)
913 return ERR_PTR(-EINVAL);
914
915 /* The RQT size must be # of entries + 1 rounded up to a power of two */
916 rqsize = roundup_pow_of_two(attrs->cap.max_recv_wr);
917 if (rqsize == attrs->cap.max_recv_wr)
918 rqsize = roundup_pow_of_two(attrs->cap.max_recv_wr+1);
919
920 /* T3 doesn't support RQT depth < 16 */
921 if (rqsize < 16)
922 rqsize = 16;
923
924 if (rqsize > T3_MAX_RQ_SIZE)
925 return ERR_PTR(-EINVAL);
926
927 if (attrs->cap.max_inline_data > T3_MAX_INLINE)
928 return ERR_PTR(-EINVAL);
929
930 /*
931 * NOTE: The SQ and total WQ sizes don't need to be
932 * a power of two. However, all the code assumes
933 * they are. EG: Q_FREECNT() and friends.
934 */
935 sqsize = roundup_pow_of_two(attrs->cap.max_send_wr);
936 wqsize = roundup_pow_of_two(rqsize + sqsize);
937
938 /*
939 * Kernel users need more wq space for fastreg WRs which can take
940 * 2 WR fragments.
941 */
942 ucontext = pd->uobject ? to_iwch_ucontext(pd->uobject->context) : NULL;
943 if (!ucontext && wqsize < (rqsize + (2 * sqsize)))
944 wqsize = roundup_pow_of_two(rqsize +
945 roundup_pow_of_two(attrs->cap.max_send_wr * 2));
946 PDBG("%s wqsize %d sqsize %d rqsize %d\n", __func__,
947 wqsize, sqsize, rqsize);
948 qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
949 if (!qhp)
950 return ERR_PTR(-ENOMEM);
951 qhp->wq.size_log2 = ilog2(wqsize);
952 qhp->wq.rq_size_log2 = ilog2(rqsize);
953 qhp->wq.sq_size_log2 = ilog2(sqsize);
954 if (cxio_create_qp(&rhp->rdev, !udata, &qhp->wq,
955 ucontext ? &ucontext->uctx : &rhp->rdev.uctx)) {
956 kfree(qhp);
957 return ERR_PTR(-ENOMEM);
958 }
959
960 attrs->cap.max_recv_wr = rqsize - 1;
961 attrs->cap.max_send_wr = sqsize;
962 attrs->cap.max_inline_data = T3_MAX_INLINE;
963
964 qhp->rhp = rhp;
965 qhp->attr.pd = php->pdid;
966 qhp->attr.scq = ((struct iwch_cq *) attrs->send_cq)->cq.cqid;
967 qhp->attr.rcq = ((struct iwch_cq *) attrs->recv_cq)->cq.cqid;
968 qhp->attr.sq_num_entries = attrs->cap.max_send_wr;
969 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr;
970 qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
971 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
972 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge;
973 qhp->attr.state = IWCH_QP_STATE_IDLE;
974 qhp->attr.next_state = IWCH_QP_STATE_IDLE;
975
976 /*
977 * XXX - These don't get passed in from the openib user
978 * at create time. The CM sets them via a QP modify.
979 * Need to fix... I think the CM should
980 */
981 qhp->attr.enable_rdma_read = 1;
982 qhp->attr.enable_rdma_write = 1;
983 qhp->attr.enable_bind = 1;
984 qhp->attr.max_ord = 1;
985 qhp->attr.max_ird = 1;
986
987 spin_lock_init(&qhp->lock);
988 init_waitqueue_head(&qhp->wait);
989 atomic_set(&qhp->refcnt, 1);
990
991 if (insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.qpid)) {
992 cxio_destroy_qp(&rhp->rdev, &qhp->wq,
993 ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
994 kfree(qhp);
995 return ERR_PTR(-ENOMEM);
996 }
997
998 if (udata) {
999
1000 struct iwch_mm_entry *mm1, *mm2;
1001
1002 mm1 = kmalloc(sizeof *mm1, GFP_KERNEL);
1003 if (!mm1) {
1004 iwch_destroy_qp(&qhp->ibqp);
1005 return ERR_PTR(-ENOMEM);
1006 }
1007
1008 mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
1009 if (!mm2) {
1010 kfree(mm1);
1011 iwch_destroy_qp(&qhp->ibqp);
1012 return ERR_PTR(-ENOMEM);
1013 }
1014
1015 uresp.qpid = qhp->wq.qpid;
1016 uresp.size_log2 = qhp->wq.size_log2;
1017 uresp.sq_size_log2 = qhp->wq.sq_size_log2;
1018 uresp.rq_size_log2 = qhp->wq.rq_size_log2;
1019 spin_lock(&ucontext->mmap_lock);
1020 uresp.key = ucontext->key;
1021 ucontext->key += PAGE_SIZE;
1022 uresp.db_key = ucontext->key;
1023 ucontext->key += PAGE_SIZE;
1024 spin_unlock(&ucontext->mmap_lock);
1025 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
1026 kfree(mm1);
1027 kfree(mm2);
1028 iwch_destroy_qp(&qhp->ibqp);
1029 return ERR_PTR(-EFAULT);
1030 }
1031 mm1->key = uresp.key;
1032 mm1->addr = virt_to_phys(qhp->wq.queue);
1033 mm1->len = PAGE_ALIGN(wqsize * sizeof (union t3_wr));
1034 insert_mmap(ucontext, mm1);
1035 mm2->key = uresp.db_key;
1036 mm2->addr = qhp->wq.udb & PAGE_MASK;
1037 mm2->len = PAGE_SIZE;
1038 insert_mmap(ucontext, mm2);
1039 }
1040 qhp->ibqp.qp_num = qhp->wq.qpid;
1041 init_timer(&(qhp->timer));
1042 PDBG("%s sq_num_entries %d, rq_num_entries %d "
1043 "qpid 0x%0x qhp %p dma_addr 0x%llx size %d rq_addr 0x%x\n",
1044 __func__, qhp->attr.sq_num_entries, qhp->attr.rq_num_entries,
1045 qhp->wq.qpid, qhp, (unsigned long long) qhp->wq.dma_addr,
1046 1 << qhp->wq.size_log2, qhp->wq.rq_addr);
1047 return &qhp->ibqp;
1048 }
1049
iwch_ib_modify_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int attr_mask,struct ib_udata * udata)1050 static int iwch_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1051 int attr_mask, struct ib_udata *udata)
1052 {
1053 struct iwch_dev *rhp;
1054 struct iwch_qp *qhp;
1055 enum iwch_qp_attr_mask mask = 0;
1056 struct iwch_qp_attributes attrs;
1057
1058 PDBG("%s ib_qp %p\n", __func__, ibqp);
1059
1060 /* iwarp does not support the RTR state */
1061 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR))
1062 attr_mask &= ~IB_QP_STATE;
1063
1064 /* Make sure we still have something left to do */
1065 if (!attr_mask)
1066 return 0;
1067
1068 memset(&attrs, 0, sizeof attrs);
1069 qhp = to_iwch_qp(ibqp);
1070 rhp = qhp->rhp;
1071
1072 attrs.next_state = iwch_convert_state(attr->qp_state);
1073 attrs.enable_rdma_read = (attr->qp_access_flags &
1074 IB_ACCESS_REMOTE_READ) ? 1 : 0;
1075 attrs.enable_rdma_write = (attr->qp_access_flags &
1076 IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
1077 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0;
1078
1079
1080 mask |= (attr_mask & IB_QP_STATE) ? IWCH_QP_ATTR_NEXT_STATE : 0;
1081 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ?
1082 (IWCH_QP_ATTR_ENABLE_RDMA_READ |
1083 IWCH_QP_ATTR_ENABLE_RDMA_WRITE |
1084 IWCH_QP_ATTR_ENABLE_RDMA_BIND) : 0;
1085
1086 return iwch_modify_qp(rhp, qhp, mask, &attrs, 0);
1087 }
1088
iwch_qp_add_ref(struct ib_qp * qp)1089 void iwch_qp_add_ref(struct ib_qp *qp)
1090 {
1091 PDBG("%s ib_qp %p\n", __func__, qp);
1092 atomic_inc(&(to_iwch_qp(qp)->refcnt));
1093 }
1094
iwch_qp_rem_ref(struct ib_qp * qp)1095 void iwch_qp_rem_ref(struct ib_qp *qp)
1096 {
1097 PDBG("%s ib_qp %p\n", __func__, qp);
1098 if (atomic_dec_and_test(&(to_iwch_qp(qp)->refcnt)))
1099 wake_up(&(to_iwch_qp(qp)->wait));
1100 }
1101
iwch_get_qp(struct ib_device * dev,int qpn)1102 static struct ib_qp *iwch_get_qp(struct ib_device *dev, int qpn)
1103 {
1104 PDBG("%s ib_dev %p qpn 0x%x\n", __func__, dev, qpn);
1105 return (struct ib_qp *)get_qhp(to_iwch_dev(dev), qpn);
1106 }
1107
1108
iwch_query_pkey(struct ib_device * ibdev,u8 port,u16 index,u16 * pkey)1109 static int iwch_query_pkey(struct ib_device *ibdev,
1110 u8 port, u16 index, u16 * pkey)
1111 {
1112 PDBG("%s ibdev %p\n", __func__, ibdev);
1113 *pkey = 0;
1114 return 0;
1115 }
1116
iwch_query_gid(struct ib_device * ibdev,u8 port,int index,union ib_gid * gid)1117 static int iwch_query_gid(struct ib_device *ibdev, u8 port,
1118 int index, union ib_gid *gid)
1119 {
1120 struct iwch_dev *dev;
1121
1122 PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
1123 __func__, ibdev, port, index, gid);
1124 dev = to_iwch_dev(ibdev);
1125 BUG_ON(port == 0 || port > 2);
1126 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
1127 memcpy(&(gid->raw[0]), dev->rdev.port_info.lldevs[port-1]->dev_addr, 6);
1128 return 0;
1129 }
1130
fw_vers_string_to_u64(struct iwch_dev * iwch_dev)1131 static u64 fw_vers_string_to_u64(struct iwch_dev *iwch_dev)
1132 {
1133 struct ethtool_drvinfo info;
1134 struct net_device *lldev = iwch_dev->rdev.t3cdev_p->lldev;
1135 char *cp, *next;
1136 unsigned fw_maj, fw_min, fw_mic;
1137
1138 lldev->ethtool_ops->get_drvinfo(lldev, &info);
1139
1140 next = info.fw_version + 1;
1141 cp = strsep(&next, ".");
1142 sscanf(cp, "%i", &fw_maj);
1143 cp = strsep(&next, ".");
1144 sscanf(cp, "%i", &fw_min);
1145 cp = strsep(&next, ".");
1146 sscanf(cp, "%i", &fw_mic);
1147
1148 return (((u64)fw_maj & 0xffff) << 32) | ((fw_min & 0xffff) << 16) |
1149 (fw_mic & 0xffff);
1150 }
1151
iwch_query_device(struct ib_device * ibdev,struct ib_device_attr * props)1152 static int iwch_query_device(struct ib_device *ibdev,
1153 struct ib_device_attr *props)
1154 {
1155
1156 struct iwch_dev *dev;
1157 PDBG("%s ibdev %p\n", __func__, ibdev);
1158
1159 dev = to_iwch_dev(ibdev);
1160 memset(props, 0, sizeof *props);
1161 memcpy(&props->sys_image_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
1162 props->hw_ver = dev->rdev.t3cdev_p->type;
1163 props->fw_ver = fw_vers_string_to_u64(dev);
1164 props->device_cap_flags = dev->device_cap_flags;
1165 props->page_size_cap = dev->attr.mem_pgsizes_bitmask;
1166 props->vendor_id = (u32)dev->rdev.rnic_info.pdev->vendor;
1167 props->vendor_part_id = (u32)dev->rdev.rnic_info.pdev->device;
1168 props->max_mr_size = dev->attr.max_mr_size;
1169 props->max_qp = dev->attr.max_qps;
1170 props->max_qp_wr = dev->attr.max_wrs;
1171 props->max_sge = dev->attr.max_sge_per_wr;
1172 props->max_sge_rd = 1;
1173 props->max_qp_rd_atom = dev->attr.max_rdma_reads_per_qp;
1174 props->max_qp_init_rd_atom = dev->attr.max_rdma_reads_per_qp;
1175 props->max_cq = dev->attr.max_cqs;
1176 props->max_cqe = dev->attr.max_cqes_per_cq;
1177 props->max_mr = dev->attr.max_mem_regs;
1178 props->max_pd = dev->attr.max_pds;
1179 props->local_ca_ack_delay = 0;
1180 props->max_fast_reg_page_list_len = T3_MAX_FASTREG_DEPTH;
1181
1182 return 0;
1183 }
1184
iwch_query_port(struct ib_device * ibdev,u8 port,struct ib_port_attr * props)1185 static int iwch_query_port(struct ib_device *ibdev,
1186 u8 port, struct ib_port_attr *props)
1187 {
1188 struct iwch_dev *dev;
1189 struct net_device *netdev;
1190 struct in_device *inetdev;
1191
1192 PDBG("%s ibdev %p\n", __func__, ibdev);
1193
1194 dev = to_iwch_dev(ibdev);
1195 netdev = dev->rdev.port_info.lldevs[port-1];
1196
1197 memset(props, 0, sizeof(struct ib_port_attr));
1198 props->max_mtu = IB_MTU_4096;
1199 if (netdev->mtu >= 4096)
1200 props->active_mtu = IB_MTU_4096;
1201 else if (netdev->mtu >= 2048)
1202 props->active_mtu = IB_MTU_2048;
1203 else if (netdev->mtu >= 1024)
1204 props->active_mtu = IB_MTU_1024;
1205 else if (netdev->mtu >= 512)
1206 props->active_mtu = IB_MTU_512;
1207 else
1208 props->active_mtu = IB_MTU_256;
1209
1210 if (!netif_carrier_ok(netdev))
1211 props->state = IB_PORT_DOWN;
1212 else {
1213 inetdev = in_dev_get(netdev);
1214 if (inetdev) {
1215 if (inetdev->ifa_list)
1216 props->state = IB_PORT_ACTIVE;
1217 else
1218 props->state = IB_PORT_INIT;
1219 in_dev_put(inetdev);
1220 } else
1221 props->state = IB_PORT_INIT;
1222 }
1223
1224 props->port_cap_flags =
1225 IB_PORT_CM_SUP |
1226 IB_PORT_SNMP_TUNNEL_SUP |
1227 IB_PORT_REINIT_SUP |
1228 IB_PORT_DEVICE_MGMT_SUP |
1229 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
1230 props->gid_tbl_len = 1;
1231 props->pkey_tbl_len = 1;
1232 props->active_width = 2;
1233 props->active_speed = IB_SPEED_DDR;
1234 props->max_msg_sz = -1;
1235
1236 return 0;
1237 }
1238
show_rev(struct device * dev,struct device_attribute * attr,char * buf)1239 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
1240 char *buf)
1241 {
1242 struct iwch_dev *iwch_dev = container_of(dev, struct iwch_dev,
1243 ibdev.dev);
1244 PDBG("%s dev 0x%p\n", __func__, dev);
1245 return sprintf(buf, "%d\n", iwch_dev->rdev.t3cdev_p->type);
1246 }
1247
show_fw_ver(struct device * dev,struct device_attribute * attr,char * buf)1248 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr, char *buf)
1249 {
1250 struct iwch_dev *iwch_dev = container_of(dev, struct iwch_dev,
1251 ibdev.dev);
1252 struct ethtool_drvinfo info;
1253 struct net_device *lldev = iwch_dev->rdev.t3cdev_p->lldev;
1254
1255 PDBG("%s dev 0x%p\n", __func__, dev);
1256 lldev->ethtool_ops->get_drvinfo(lldev, &info);
1257 return sprintf(buf, "%s\n", info.fw_version);
1258 }
1259
show_hca(struct device * dev,struct device_attribute * attr,char * buf)1260 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
1261 char *buf)
1262 {
1263 struct iwch_dev *iwch_dev = container_of(dev, struct iwch_dev,
1264 ibdev.dev);
1265 struct ethtool_drvinfo info;
1266 struct net_device *lldev = iwch_dev->rdev.t3cdev_p->lldev;
1267
1268 PDBG("%s dev 0x%p\n", __func__, dev);
1269 lldev->ethtool_ops->get_drvinfo(lldev, &info);
1270 return sprintf(buf, "%s\n", info.driver);
1271 }
1272
show_board(struct device * dev,struct device_attribute * attr,char * buf)1273 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
1274 char *buf)
1275 {
1276 struct iwch_dev *iwch_dev = container_of(dev, struct iwch_dev,
1277 ibdev.dev);
1278 PDBG("%s dev 0x%p\n", __func__, dev);
1279 return sprintf(buf, "%x.%x\n", iwch_dev->rdev.rnic_info.pdev->vendor,
1280 iwch_dev->rdev.rnic_info.pdev->device);
1281 }
1282
iwch_get_mib(struct ib_device * ibdev,union rdma_protocol_stats * stats)1283 static int iwch_get_mib(struct ib_device *ibdev,
1284 union rdma_protocol_stats *stats)
1285 {
1286 struct iwch_dev *dev;
1287 struct tp_mib_stats m;
1288 int ret;
1289
1290 PDBG("%s ibdev %p\n", __func__, ibdev);
1291 dev = to_iwch_dev(ibdev);
1292 ret = dev->rdev.t3cdev_p->ctl(dev->rdev.t3cdev_p, RDMA_GET_MIB, &m);
1293 if (ret)
1294 return -ENOSYS;
1295
1296 memset(stats, 0, sizeof *stats);
1297 stats->iw.ipInReceives = ((u64) m.ipInReceive_hi << 32) +
1298 m.ipInReceive_lo;
1299 stats->iw.ipInHdrErrors = ((u64) m.ipInHdrErrors_hi << 32) +
1300 m.ipInHdrErrors_lo;
1301 stats->iw.ipInAddrErrors = ((u64) m.ipInAddrErrors_hi << 32) +
1302 m.ipInAddrErrors_lo;
1303 stats->iw.ipInUnknownProtos = ((u64) m.ipInUnknownProtos_hi << 32) +
1304 m.ipInUnknownProtos_lo;
1305 stats->iw.ipInDiscards = ((u64) m.ipInDiscards_hi << 32) +
1306 m.ipInDiscards_lo;
1307 stats->iw.ipInDelivers = ((u64) m.ipInDelivers_hi << 32) +
1308 m.ipInDelivers_lo;
1309 stats->iw.ipOutRequests = ((u64) m.ipOutRequests_hi << 32) +
1310 m.ipOutRequests_lo;
1311 stats->iw.ipOutDiscards = ((u64) m.ipOutDiscards_hi << 32) +
1312 m.ipOutDiscards_lo;
1313 stats->iw.ipOutNoRoutes = ((u64) m.ipOutNoRoutes_hi << 32) +
1314 m.ipOutNoRoutes_lo;
1315 stats->iw.ipReasmTimeout = (u64) m.ipReasmTimeout;
1316 stats->iw.ipReasmReqds = (u64) m.ipReasmReqds;
1317 stats->iw.ipReasmOKs = (u64) m.ipReasmOKs;
1318 stats->iw.ipReasmFails = (u64) m.ipReasmFails;
1319 stats->iw.tcpActiveOpens = (u64) m.tcpActiveOpens;
1320 stats->iw.tcpPassiveOpens = (u64) m.tcpPassiveOpens;
1321 stats->iw.tcpAttemptFails = (u64) m.tcpAttemptFails;
1322 stats->iw.tcpEstabResets = (u64) m.tcpEstabResets;
1323 stats->iw.tcpOutRsts = (u64) m.tcpOutRsts;
1324 stats->iw.tcpCurrEstab = (u64) m.tcpCurrEstab;
1325 stats->iw.tcpInSegs = ((u64) m.tcpInSegs_hi << 32) +
1326 m.tcpInSegs_lo;
1327 stats->iw.tcpOutSegs = ((u64) m.tcpOutSegs_hi << 32) +
1328 m.tcpOutSegs_lo;
1329 stats->iw.tcpRetransSegs = ((u64) m.tcpRetransSeg_hi << 32) +
1330 m.tcpRetransSeg_lo;
1331 stats->iw.tcpInErrs = ((u64) m.tcpInErrs_hi << 32) +
1332 m.tcpInErrs_lo;
1333 stats->iw.tcpRtoMin = (u64) m.tcpRtoMin;
1334 stats->iw.tcpRtoMax = (u64) m.tcpRtoMax;
1335 return 0;
1336 }
1337
1338 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1339 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
1340 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1341 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
1342
1343 static struct device_attribute *iwch_class_attributes[] = {
1344 &dev_attr_hw_rev,
1345 &dev_attr_fw_ver,
1346 &dev_attr_hca_type,
1347 &dev_attr_board_id,
1348 };
1349
iwch_register_device(struct iwch_dev * dev)1350 int iwch_register_device(struct iwch_dev *dev)
1351 {
1352 int ret;
1353 int i;
1354
1355 PDBG("%s iwch_dev %p\n", __func__, dev);
1356 strlcpy(dev->ibdev.name, "cxgb3_%d", IB_DEVICE_NAME_MAX);
1357 memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
1358 memcpy(&dev->ibdev.node_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
1359 dev->ibdev.owner = THIS_MODULE;
1360 dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY |
1361 IB_DEVICE_MEM_WINDOW |
1362 IB_DEVICE_MEM_MGT_EXTENSIONS;
1363
1364 /* cxgb3 supports STag 0. */
1365 dev->ibdev.local_dma_lkey = 0;
1366
1367 dev->ibdev.uverbs_cmd_mask =
1368 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
1369 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
1370 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
1371 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
1372 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
1373 (1ull << IB_USER_VERBS_CMD_REG_MR) |
1374 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
1375 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1376 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
1377 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
1378 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
1379 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
1380 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
1381 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
1382 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
1383 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
1384 (1ull << IB_USER_VERBS_CMD_POST_RECV);
1385 dev->ibdev.node_type = RDMA_NODE_RNIC;
1386 memcpy(dev->ibdev.node_desc, IWCH_NODE_DESC, sizeof(IWCH_NODE_DESC));
1387 dev->ibdev.phys_port_cnt = dev->rdev.port_info.nports;
1388 dev->ibdev.num_comp_vectors = 1;
1389 dev->ibdev.dma_device = &(dev->rdev.rnic_info.pdev->dev);
1390 dev->ibdev.query_device = iwch_query_device;
1391 dev->ibdev.query_port = iwch_query_port;
1392 dev->ibdev.query_pkey = iwch_query_pkey;
1393 dev->ibdev.query_gid = iwch_query_gid;
1394 dev->ibdev.alloc_ucontext = iwch_alloc_ucontext;
1395 dev->ibdev.dealloc_ucontext = iwch_dealloc_ucontext;
1396 dev->ibdev.mmap = iwch_mmap;
1397 dev->ibdev.alloc_pd = iwch_allocate_pd;
1398 dev->ibdev.dealloc_pd = iwch_deallocate_pd;
1399 dev->ibdev.create_ah = iwch_ah_create;
1400 dev->ibdev.destroy_ah = iwch_ah_destroy;
1401 dev->ibdev.create_qp = iwch_create_qp;
1402 dev->ibdev.modify_qp = iwch_ib_modify_qp;
1403 dev->ibdev.destroy_qp = iwch_destroy_qp;
1404 dev->ibdev.create_cq = iwch_create_cq;
1405 dev->ibdev.destroy_cq = iwch_destroy_cq;
1406 dev->ibdev.resize_cq = iwch_resize_cq;
1407 dev->ibdev.poll_cq = iwch_poll_cq;
1408 dev->ibdev.get_dma_mr = iwch_get_dma_mr;
1409 dev->ibdev.reg_phys_mr = iwch_register_phys_mem;
1410 dev->ibdev.rereg_phys_mr = iwch_reregister_phys_mem;
1411 dev->ibdev.reg_user_mr = iwch_reg_user_mr;
1412 dev->ibdev.dereg_mr = iwch_dereg_mr;
1413 dev->ibdev.alloc_mw = iwch_alloc_mw;
1414 dev->ibdev.bind_mw = iwch_bind_mw;
1415 dev->ibdev.dealloc_mw = iwch_dealloc_mw;
1416 dev->ibdev.alloc_fast_reg_mr = iwch_alloc_fast_reg_mr;
1417 dev->ibdev.alloc_fast_reg_page_list = iwch_alloc_fastreg_pbl;
1418 dev->ibdev.free_fast_reg_page_list = iwch_free_fastreg_pbl;
1419 dev->ibdev.attach_mcast = iwch_multicast_attach;
1420 dev->ibdev.detach_mcast = iwch_multicast_detach;
1421 dev->ibdev.process_mad = iwch_process_mad;
1422 dev->ibdev.req_notify_cq = iwch_arm_cq;
1423 dev->ibdev.post_send = iwch_post_send;
1424 dev->ibdev.post_recv = iwch_post_receive;
1425 dev->ibdev.get_protocol_stats = iwch_get_mib;
1426 dev->ibdev.uverbs_abi_ver = IWCH_UVERBS_ABI_VERSION;
1427
1428 dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
1429 if (!dev->ibdev.iwcm)
1430 return -ENOMEM;
1431
1432 dev->ibdev.iwcm->connect = iwch_connect;
1433 dev->ibdev.iwcm->accept = iwch_accept_cr;
1434 dev->ibdev.iwcm->reject = iwch_reject_cr;
1435 dev->ibdev.iwcm->create_listen = iwch_create_listen;
1436 dev->ibdev.iwcm->destroy_listen = iwch_destroy_listen;
1437 dev->ibdev.iwcm->add_ref = iwch_qp_add_ref;
1438 dev->ibdev.iwcm->rem_ref = iwch_qp_rem_ref;
1439 dev->ibdev.iwcm->get_qp = iwch_get_qp;
1440
1441 ret = ib_register_device(&dev->ibdev, NULL);
1442 if (ret)
1443 goto bail1;
1444
1445 for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i) {
1446 ret = device_create_file(&dev->ibdev.dev,
1447 iwch_class_attributes[i]);
1448 if (ret) {
1449 goto bail2;
1450 }
1451 }
1452 return 0;
1453 bail2:
1454 ib_unregister_device(&dev->ibdev);
1455 bail1:
1456 kfree(dev->ibdev.iwcm);
1457 return ret;
1458 }
1459
iwch_unregister_device(struct iwch_dev * dev)1460 void iwch_unregister_device(struct iwch_dev *dev)
1461 {
1462 int i;
1463
1464 PDBG("%s iwch_dev %p\n", __func__, dev);
1465 for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i)
1466 device_remove_file(&dev->ibdev.dev,
1467 iwch_class_attributes[i]);
1468 ib_unregister_device(&dev->ibdev);
1469 kfree(dev->ibdev.iwcm);
1470 return;
1471 }
1472