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_modify_port(struct ib_device * ibdev,u8 port,int port_modify_mask,struct ib_port_modify * props)64 static int iwch_modify_port(struct ib_device *ibdev,
65 u8 port, int port_modify_mask,
66 struct ib_port_modify *props)
67 {
68 return -ENOSYS;
69 }
70
iwch_ah_create(struct ib_pd * pd,struct ib_ah_attr * ah_attr)71 static struct ib_ah *iwch_ah_create(struct ib_pd *pd,
72 struct ib_ah_attr *ah_attr)
73 {
74 return ERR_PTR(-ENOSYS);
75 }
76
iwch_ah_destroy(struct ib_ah * ah)77 static int iwch_ah_destroy(struct ib_ah *ah)
78 {
79 return -ENOSYS;
80 }
81
iwch_multicast_attach(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)82 static int iwch_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
83 {
84 return -ENOSYS;
85 }
86
iwch_multicast_detach(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)87 static int iwch_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
88 {
89 return -ENOSYS;
90 }
91
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)92 static int iwch_process_mad(struct ib_device *ibdev,
93 int mad_flags,
94 u8 port_num,
95 struct ib_wc *in_wc,
96 struct ib_grh *in_grh,
97 struct ib_mad *in_mad, struct ib_mad *out_mad)
98 {
99 return -ENOSYS;
100 }
101
iwch_dealloc_ucontext(struct ib_ucontext * context)102 static int iwch_dealloc_ucontext(struct ib_ucontext *context)
103 {
104 struct iwch_dev *rhp = to_iwch_dev(context->device);
105 struct iwch_ucontext *ucontext = to_iwch_ucontext(context);
106 struct iwch_mm_entry *mm, *tmp;
107
108 PDBG("%s context %p\n", __func__, context);
109 list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
110 kfree(mm);
111 cxio_release_ucontext(&rhp->rdev, &ucontext->uctx);
112 kfree(ucontext);
113 return 0;
114 }
115
iwch_alloc_ucontext(struct ib_device * ibdev,struct ib_udata * udata)116 static struct ib_ucontext *iwch_alloc_ucontext(struct ib_device *ibdev,
117 struct ib_udata *udata)
118 {
119 struct iwch_ucontext *context;
120 struct iwch_dev *rhp = to_iwch_dev(ibdev);
121
122 PDBG("%s ibdev %p\n", __func__, ibdev);
123 context = kzalloc(sizeof(*context), GFP_KERNEL);
124 if (!context)
125 return ERR_PTR(-ENOMEM);
126 cxio_init_ucontext(&rhp->rdev, &context->uctx);
127 INIT_LIST_HEAD(&context->mmaps);
128 spin_lock_init(&context->mmap_lock);
129 return &context->ibucontext;
130 }
131
iwch_destroy_cq(struct ib_cq * ib_cq)132 static int iwch_destroy_cq(struct ib_cq *ib_cq)
133 {
134 struct iwch_cq *chp;
135
136 PDBG("%s ib_cq %p\n", __func__, ib_cq);
137 chp = to_iwch_cq(ib_cq);
138
139 remove_handle(chp->rhp, &chp->rhp->cqidr, chp->cq.cqid);
140 atomic_dec(&chp->refcnt);
141 wait_event(chp->wait, !atomic_read(&chp->refcnt));
142
143 cxio_destroy_cq(&chp->rhp->rdev, &chp->cq);
144 kfree(chp);
145 return 0;
146 }
147
iwch_create_cq(struct ib_device * ibdev,int entries,int vector,struct ib_ucontext * ib_context,struct ib_udata * udata)148 static struct ib_cq *iwch_create_cq(struct ib_device *ibdev, int entries, int vector,
149 struct ib_ucontext *ib_context,
150 struct ib_udata *udata)
151 {
152 struct iwch_dev *rhp;
153 struct iwch_cq *chp;
154 struct iwch_create_cq_resp uresp;
155 struct iwch_create_cq_req ureq;
156 struct iwch_ucontext *ucontext = NULL;
157 static int warned;
158 size_t resplen;
159
160 PDBG("%s ib_dev %p entries %d\n", __func__, ibdev, entries);
161 rhp = to_iwch_dev(ibdev);
162 chp = kzalloc(sizeof(*chp), GFP_KERNEL);
163 if (!chp)
164 return ERR_PTR(-ENOMEM);
165
166 if (ib_context) {
167 ucontext = to_iwch_ucontext(ib_context);
168 if (!t3a_device(rhp)) {
169 if (ib_copy_from_udata(&ureq, udata, sizeof (ureq))) {
170 kfree(chp);
171 return ERR_PTR(-EFAULT);
172 }
173 chp->user_rptr_addr = (u32 __user *)(unsigned long)ureq.user_rptr_addr;
174 }
175 }
176
177 if (t3a_device(rhp)) {
178
179 /*
180 * T3A: Add some fluff to handle extra CQEs inserted
181 * for various errors.
182 * Additional CQE possibilities:
183 * TERMINATE,
184 * incoming RDMA WRITE Failures
185 * incoming RDMA READ REQUEST FAILUREs
186 * NOTE: We cannot ensure the CQ won't overflow.
187 */
188 entries += 16;
189 }
190 entries = roundup_pow_of_two(entries);
191 chp->cq.size_log2 = ilog2(entries);
192
193 if (cxio_create_cq(&rhp->rdev, &chp->cq, !ucontext)) {
194 kfree(chp);
195 return ERR_PTR(-ENOMEM);
196 }
197 chp->rhp = rhp;
198 chp->ibcq.cqe = 1 << chp->cq.size_log2;
199 spin_lock_init(&chp->lock);
200 atomic_set(&chp->refcnt, 1);
201 init_waitqueue_head(&chp->wait);
202 if (insert_handle(rhp, &rhp->cqidr, chp, chp->cq.cqid)) {
203 cxio_destroy_cq(&chp->rhp->rdev, &chp->cq);
204 kfree(chp);
205 return ERR_PTR(-ENOMEM);
206 }
207
208 if (ucontext) {
209 struct iwch_mm_entry *mm;
210
211 mm = kmalloc(sizeof *mm, GFP_KERNEL);
212 if (!mm) {
213 iwch_destroy_cq(&chp->ibcq);
214 return ERR_PTR(-ENOMEM);
215 }
216 uresp.cqid = chp->cq.cqid;
217 uresp.size_log2 = chp->cq.size_log2;
218 spin_lock(&ucontext->mmap_lock);
219 uresp.key = ucontext->key;
220 ucontext->key += PAGE_SIZE;
221 spin_unlock(&ucontext->mmap_lock);
222 mm->key = uresp.key;
223 mm->addr = virt_to_phys(chp->cq.queue);
224 if (udata->outlen < sizeof uresp) {
225 if (!warned++)
226 printk(KERN_WARNING MOD "Warning - "
227 "downlevel libcxgb3 (non-fatal).\n");
228 mm->len = PAGE_ALIGN((1UL << uresp.size_log2) *
229 sizeof(struct t3_cqe));
230 resplen = sizeof(struct iwch_create_cq_resp_v0);
231 } else {
232 mm->len = PAGE_ALIGN(((1UL << uresp.size_log2) + 1) *
233 sizeof(struct t3_cqe));
234 uresp.memsize = mm->len;
235 resplen = sizeof uresp;
236 }
237 if (ib_copy_to_udata(udata, &uresp, resplen)) {
238 kfree(mm);
239 iwch_destroy_cq(&chp->ibcq);
240 return ERR_PTR(-EFAULT);
241 }
242 insert_mmap(ucontext, mm);
243 }
244 PDBG("created cqid 0x%0x chp %p size 0x%0x, dma_addr 0x%0llx\n",
245 chp->cq.cqid, chp, (1 << chp->cq.size_log2),
246 (unsigned long long) chp->cq.dma_addr);
247 return &chp->ibcq;
248 }
249
iwch_resize_cq(struct ib_cq * cq,int cqe,struct ib_udata * udata)250 static int iwch_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata)
251 {
252 #ifdef notyet
253 struct iwch_cq *chp = to_iwch_cq(cq);
254 struct t3_cq oldcq, newcq;
255 int ret;
256
257 PDBG("%s ib_cq %p cqe %d\n", __func__, cq, cqe);
258
259 /* We don't downsize... */
260 if (cqe <= cq->cqe)
261 return 0;
262
263 /* create new t3_cq with new size */
264 cqe = roundup_pow_of_two(cqe+1);
265 newcq.size_log2 = ilog2(cqe);
266
267 /* Dont allow resize to less than the current wce count */
268 if (cqe < Q_COUNT(chp->cq.rptr, chp->cq.wptr)) {
269 return -ENOMEM;
270 }
271
272 /* Quiesce all QPs using this CQ */
273 ret = iwch_quiesce_qps(chp);
274 if (ret) {
275 return ret;
276 }
277
278 ret = cxio_create_cq(&chp->rhp->rdev, &newcq);
279 if (ret) {
280 return ret;
281 }
282
283 /* copy CQEs */
284 memcpy(newcq.queue, chp->cq.queue, (1 << chp->cq.size_log2) *
285 sizeof(struct t3_cqe));
286
287 /* old iwch_qp gets new t3_cq but keeps old cqid */
288 oldcq = chp->cq;
289 chp->cq = newcq;
290 chp->cq.cqid = oldcq.cqid;
291
292 /* resize new t3_cq to update the HW context */
293 ret = cxio_resize_cq(&chp->rhp->rdev, &chp->cq);
294 if (ret) {
295 chp->cq = oldcq;
296 return ret;
297 }
298 chp->ibcq.cqe = (1<<chp->cq.size_log2) - 1;
299
300 /* destroy old t3_cq */
301 oldcq.cqid = newcq.cqid;
302 ret = cxio_destroy_cq(&chp->rhp->rdev, &oldcq);
303 if (ret) {
304 printk(KERN_ERR MOD "%s - cxio_destroy_cq failed %d\n",
305 __func__, ret);
306 }
307
308 /* add user hooks here */
309
310 /* resume qps */
311 ret = iwch_resume_qps(chp);
312 return ret;
313 #else
314 return -ENOSYS;
315 #endif
316 }
317
iwch_arm_cq(struct ib_cq * ibcq,enum ib_cq_notify_flags flags)318 static int iwch_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
319 {
320 struct iwch_dev *rhp;
321 struct iwch_cq *chp;
322 enum t3_cq_opcode cq_op;
323 int err;
324 unsigned long flag;
325 u32 rptr;
326
327 chp = to_iwch_cq(ibcq);
328 rhp = chp->rhp;
329 if ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
330 cq_op = CQ_ARM_SE;
331 else
332 cq_op = CQ_ARM_AN;
333 if (chp->user_rptr_addr) {
334 if (get_user(rptr, chp->user_rptr_addr))
335 return -EFAULT;
336 spin_lock_irqsave(&chp->lock, flag);
337 chp->cq.rptr = rptr;
338 } else
339 spin_lock_irqsave(&chp->lock, flag);
340 PDBG("%s rptr 0x%x\n", __func__, chp->cq.rptr);
341 err = cxio_hal_cq_op(&rhp->rdev, &chp->cq, cq_op, 0);
342 spin_unlock_irqrestore(&chp->lock, flag);
343 if (err < 0)
344 printk(KERN_ERR MOD "Error %d rearming CQID 0x%x\n", err,
345 chp->cq.cqid);
346 if (err > 0 && !(flags & IB_CQ_REPORT_MISSED_EVENTS))
347 err = 0;
348 return err;
349 }
350
iwch_mmap(struct ib_ucontext * context,struct vm_area_struct * vma)351 static int iwch_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
352 {
353 int len = vma->vm_end - vma->vm_start;
354 u32 key = vma->vm_pgoff << PAGE_SHIFT;
355 struct cxio_rdev *rdev_p;
356 int ret = 0;
357 struct iwch_mm_entry *mm;
358 struct iwch_ucontext *ucontext;
359 u64 addr;
360
361 PDBG("%s pgoff 0x%lx key 0x%x len %d\n", __func__, vma->vm_pgoff,
362 key, len);
363
364 if (vma->vm_start & (PAGE_SIZE-1)) {
365 return -EINVAL;
366 }
367
368 rdev_p = &(to_iwch_dev(context->device)->rdev);
369 ucontext = to_iwch_ucontext(context);
370
371 mm = remove_mmap(ucontext, key, len);
372 if (!mm)
373 return -EINVAL;
374 addr = mm->addr;
375 kfree(mm);
376
377 if ((addr >= rdev_p->rnic_info.udbell_physbase) &&
378 (addr < (rdev_p->rnic_info.udbell_physbase +
379 rdev_p->rnic_info.udbell_len))) {
380
381 /*
382 * Map T3 DB register.
383 */
384 if (vma->vm_flags & VM_READ) {
385 return -EPERM;
386 }
387
388 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
389 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
390 vma->vm_flags &= ~VM_MAYREAD;
391 ret = io_remap_pfn_range(vma, vma->vm_start,
392 addr >> PAGE_SHIFT,
393 len, vma->vm_page_prot);
394 } else {
395
396 /*
397 * Map WQ or CQ contig dma memory...
398 */
399 ret = remap_pfn_range(vma, vma->vm_start,
400 addr >> PAGE_SHIFT,
401 len, vma->vm_page_prot);
402 }
403
404 return ret;
405 }
406
iwch_deallocate_pd(struct ib_pd * pd)407 static int iwch_deallocate_pd(struct ib_pd *pd)
408 {
409 struct iwch_dev *rhp;
410 struct iwch_pd *php;
411
412 php = to_iwch_pd(pd);
413 rhp = php->rhp;
414 PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid);
415 cxio_hal_put_pdid(rhp->rdev.rscp, php->pdid);
416 kfree(php);
417 return 0;
418 }
419
iwch_allocate_pd(struct ib_device * ibdev,struct ib_ucontext * context,struct ib_udata * udata)420 static struct ib_pd *iwch_allocate_pd(struct ib_device *ibdev,
421 struct ib_ucontext *context,
422 struct ib_udata *udata)
423 {
424 struct iwch_pd *php;
425 u32 pdid;
426 struct iwch_dev *rhp;
427
428 PDBG("%s ibdev %p\n", __func__, ibdev);
429 rhp = (struct iwch_dev *) ibdev;
430 pdid = cxio_hal_get_pdid(rhp->rdev.rscp);
431 if (!pdid)
432 return ERR_PTR(-EINVAL);
433 php = kzalloc(sizeof(*php), GFP_KERNEL);
434 if (!php) {
435 cxio_hal_put_pdid(rhp->rdev.rscp, pdid);
436 return ERR_PTR(-ENOMEM);
437 }
438 php->pdid = pdid;
439 php->rhp = rhp;
440 if (context) {
441 if (ib_copy_to_udata(udata, &php->pdid, sizeof (__u32))) {
442 iwch_deallocate_pd(&php->ibpd);
443 return ERR_PTR(-EFAULT);
444 }
445 }
446 PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php);
447 return &php->ibpd;
448 }
449
iwch_dereg_mr(struct ib_mr * ib_mr)450 static int iwch_dereg_mr(struct ib_mr *ib_mr)
451 {
452 struct iwch_dev *rhp;
453 struct iwch_mr *mhp;
454 u32 mmid;
455
456 PDBG("%s ib_mr %p\n", __func__, ib_mr);
457 /* There can be no memory windows */
458 if (atomic_read(&ib_mr->usecnt))
459 return -EINVAL;
460
461 mhp = to_iwch_mr(ib_mr);
462 rhp = mhp->rhp;
463 mmid = mhp->attr.stag >> 8;
464 cxio_dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
465 mhp->attr.pbl_addr);
466 iwch_free_pbl(mhp);
467 remove_handle(rhp, &rhp->mmidr, mmid);
468 if (mhp->kva)
469 kfree((void *) (unsigned long) mhp->kva);
470 if (mhp->umem)
471 ib_umem_release(mhp->umem);
472 PDBG("%s mmid 0x%x ptr %p\n", __func__, mmid, mhp);
473 kfree(mhp);
474 return 0;
475 }
476
iwch_register_phys_mem(struct ib_pd * pd,struct ib_phys_buf * buffer_list,int num_phys_buf,int acc,u64 * iova_start)477 static struct ib_mr *iwch_register_phys_mem(struct ib_pd *pd,
478 struct ib_phys_buf *buffer_list,
479 int num_phys_buf,
480 int acc,
481 u64 *iova_start)
482 {
483 __be64 *page_list;
484 int shift;
485 u64 total_size;
486 int npages;
487 struct iwch_dev *rhp;
488 struct iwch_pd *php;
489 struct iwch_mr *mhp;
490 int ret;
491
492 PDBG("%s ib_pd %p\n", __func__, pd);
493 php = to_iwch_pd(pd);
494 rhp = php->rhp;
495
496 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
497 if (!mhp)
498 return ERR_PTR(-ENOMEM);
499
500 mhp->rhp = rhp;
501
502 /* First check that we have enough alignment */
503 if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK)) {
504 ret = -EINVAL;
505 goto err;
506 }
507
508 if (num_phys_buf > 1 &&
509 ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK)) {
510 ret = -EINVAL;
511 goto err;
512 }
513
514 ret = build_phys_page_list(buffer_list, num_phys_buf, iova_start,
515 &total_size, &npages, &shift, &page_list);
516 if (ret)
517 goto err;
518
519 ret = iwch_alloc_pbl(mhp, npages);
520 if (ret) {
521 kfree(page_list);
522 goto err_pbl;
523 }
524
525 ret = iwch_write_pbl(mhp, page_list, npages, 0);
526 kfree(page_list);
527 if (ret)
528 goto err_pbl;
529
530 mhp->attr.pdid = php->pdid;
531 mhp->attr.zbva = 0;
532
533 mhp->attr.perms = iwch_ib_to_tpt_access(acc);
534 mhp->attr.va_fbo = *iova_start;
535 mhp->attr.page_size = shift - 12;
536
537 mhp->attr.len = (u32) total_size;
538 mhp->attr.pbl_size = npages;
539 ret = iwch_register_mem(rhp, php, mhp, shift);
540 if (ret)
541 goto err_pbl;
542
543 return &mhp->ibmr;
544
545 err_pbl:
546 iwch_free_pbl(mhp);
547
548 err:
549 kfree(mhp);
550 return ERR_PTR(ret);
551
552 }
553
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)554 static int iwch_reregister_phys_mem(struct ib_mr *mr,
555 int mr_rereg_mask,
556 struct ib_pd *pd,
557 struct ib_phys_buf *buffer_list,
558 int num_phys_buf,
559 int acc, u64 * iova_start)
560 {
561
562 struct iwch_mr mh, *mhp;
563 struct iwch_pd *php;
564 struct iwch_dev *rhp;
565 __be64 *page_list = NULL;
566 int shift = 0;
567 u64 total_size;
568 int npages;
569 int ret;
570
571 PDBG("%s ib_mr %p ib_pd %p\n", __func__, mr, pd);
572
573 /* There can be no memory windows */
574 if (atomic_read(&mr->usecnt))
575 return -EINVAL;
576
577 mhp = to_iwch_mr(mr);
578 rhp = mhp->rhp;
579 php = to_iwch_pd(mr->pd);
580
581 /* make sure we are on the same adapter */
582 if (rhp != php->rhp)
583 return -EINVAL;
584
585 memcpy(&mh, mhp, sizeof *mhp);
586
587 if (mr_rereg_mask & IB_MR_REREG_PD)
588 php = to_iwch_pd(pd);
589 if (mr_rereg_mask & IB_MR_REREG_ACCESS)
590 mh.attr.perms = iwch_ib_to_tpt_access(acc);
591 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
592 ret = build_phys_page_list(buffer_list, num_phys_buf,
593 iova_start,
594 &total_size, &npages,
595 &shift, &page_list);
596 if (ret)
597 return ret;
598 }
599
600 ret = iwch_reregister_mem(rhp, php, &mh, shift, npages);
601 kfree(page_list);
602 if (ret) {
603 return ret;
604 }
605 if (mr_rereg_mask & IB_MR_REREG_PD)
606 mhp->attr.pdid = php->pdid;
607 if (mr_rereg_mask & IB_MR_REREG_ACCESS)
608 mhp->attr.perms = iwch_ib_to_tpt_access(acc);
609 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
610 mhp->attr.zbva = 0;
611 mhp->attr.va_fbo = *iova_start;
612 mhp->attr.page_size = shift - 12;
613 mhp->attr.len = (u32) total_size;
614 mhp->attr.pbl_size = npages;
615 }
616
617 return 0;
618 }
619
620
iwch_reg_user_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt,int acc,struct ib_udata * udata)621 static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
622 u64 virt, int acc, struct ib_udata *udata)
623 {
624 __be64 *pages;
625 int shift, n, len;
626 int i, j, k;
627 int err = 0;
628 struct ib_umem_chunk *chunk;
629 struct iwch_dev *rhp;
630 struct iwch_pd *php;
631 struct iwch_mr *mhp;
632 struct iwch_reg_user_mr_resp uresp;
633
634 PDBG("%s ib_pd %p\n", __func__, pd);
635
636 php = to_iwch_pd(pd);
637 rhp = php->rhp;
638 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
639 if (!mhp)
640 return ERR_PTR(-ENOMEM);
641
642 mhp->rhp = rhp;
643
644 mhp->umem = ib_umem_get(pd->uobject->context, start, length, acc, 0);
645 if (IS_ERR(mhp->umem)) {
646 err = PTR_ERR(mhp->umem);
647 kfree(mhp);
648 return ERR_PTR(err);
649 }
650
651 shift = ffs(mhp->umem->page_size) - 1;
652
653 n = 0;
654 list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
655 n += chunk->nents;
656
657 err = iwch_alloc_pbl(mhp, n);
658 if (err)
659 goto err;
660
661 pages = (__be64 *) __get_free_page(GFP_KERNEL);
662 if (!pages) {
663 err = -ENOMEM;
664 goto err_pbl;
665 }
666
667 i = n = 0;
668
669 list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
670 for (j = 0; j < chunk->nmap; ++j) {
671 len = sg_dma_len(&chunk->page_list[j]) >> shift;
672 for (k = 0; k < len; ++k) {
673 pages[i++] = cpu_to_be64(sg_dma_address(
674 &chunk->page_list[j]) +
675 mhp->umem->page_size * k);
676 if (i == PAGE_SIZE / sizeof *pages) {
677 err = iwch_write_pbl(mhp, pages, i, n);
678 if (err)
679 goto pbl_done;
680 n += i;
681 i = 0;
682 }
683 }
684 }
685
686 if (i)
687 err = iwch_write_pbl(mhp, pages, i, n);
688
689 pbl_done:
690 free_page((unsigned long) pages);
691 if (err)
692 goto err_pbl;
693
694 mhp->attr.pdid = php->pdid;
695 mhp->attr.zbva = 0;
696 mhp->attr.perms = iwch_ib_to_tpt_access(acc);
697 mhp->attr.va_fbo = virt;
698 mhp->attr.page_size = shift - 12;
699 mhp->attr.len = (u32) length;
700
701 err = iwch_register_mem(rhp, php, mhp, shift);
702 if (err)
703 goto err_pbl;
704
705 if (udata && !t3a_device(rhp)) {
706 uresp.pbl_addr = (mhp->attr.pbl_addr -
707 rhp->rdev.rnic_info.pbl_base) >> 3;
708 PDBG("%s user resp pbl_addr 0x%x\n", __func__,
709 uresp.pbl_addr);
710
711 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
712 iwch_dereg_mr(&mhp->ibmr);
713 err = -EFAULT;
714 goto err;
715 }
716 }
717
718 return &mhp->ibmr;
719
720 err_pbl:
721 iwch_free_pbl(mhp);
722
723 err:
724 ib_umem_release(mhp->umem);
725 kfree(mhp);
726 return ERR_PTR(err);
727 }
728
iwch_get_dma_mr(struct ib_pd * pd,int acc)729 static struct ib_mr *iwch_get_dma_mr(struct ib_pd *pd, int acc)
730 {
731 struct ib_phys_buf bl;
732 u64 kva;
733 struct ib_mr *ibmr;
734
735 PDBG("%s ib_pd %p\n", __func__, pd);
736
737 /*
738 * T3 only supports 32 bits of size.
739 */
740 bl.size = 0xffffffff;
741 bl.addr = 0;
742 kva = 0;
743 ibmr = iwch_register_phys_mem(pd, &bl, 1, acc, &kva);
744 return ibmr;
745 }
746
iwch_alloc_mw(struct ib_pd * pd)747 static struct ib_mw *iwch_alloc_mw(struct ib_pd *pd)
748 {
749 struct iwch_dev *rhp;
750 struct iwch_pd *php;
751 struct iwch_mw *mhp;
752 u32 mmid;
753 u32 stag = 0;
754 int ret;
755
756 php = to_iwch_pd(pd);
757 rhp = php->rhp;
758 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
759 if (!mhp)
760 return ERR_PTR(-ENOMEM);
761 ret = cxio_allocate_window(&rhp->rdev, &stag, php->pdid);
762 if (ret) {
763 kfree(mhp);
764 return ERR_PTR(ret);
765 }
766 mhp->rhp = rhp;
767 mhp->attr.pdid = php->pdid;
768 mhp->attr.type = TPT_MW;
769 mhp->attr.stag = stag;
770 mmid = (stag) >> 8;
771 mhp->ibmw.rkey = stag;
772 if (insert_handle(rhp, &rhp->mmidr, mhp, mmid)) {
773 cxio_deallocate_window(&rhp->rdev, mhp->attr.stag);
774 kfree(mhp);
775 return ERR_PTR(-ENOMEM);
776 }
777 PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __func__, mmid, mhp, stag);
778 return &(mhp->ibmw);
779 }
780
iwch_dealloc_mw(struct ib_mw * mw)781 static int iwch_dealloc_mw(struct ib_mw *mw)
782 {
783 struct iwch_dev *rhp;
784 struct iwch_mw *mhp;
785 u32 mmid;
786
787 mhp = to_iwch_mw(mw);
788 rhp = mhp->rhp;
789 mmid = (mw->rkey) >> 8;
790 cxio_deallocate_window(&rhp->rdev, mhp->attr.stag);
791 remove_handle(rhp, &rhp->mmidr, mmid);
792 kfree(mhp);
793 PDBG("%s ib_mw %p mmid 0x%x ptr %p\n", __func__, mw, mmid, mhp);
794 return 0;
795 }
796
iwch_alloc_fast_reg_mr(struct ib_pd * pd,int pbl_depth)797 static struct ib_mr *iwch_alloc_fast_reg_mr(struct ib_pd *pd, int pbl_depth)
798 {
799 struct iwch_dev *rhp;
800 struct iwch_pd *php;
801 struct iwch_mr *mhp;
802 u32 mmid;
803 u32 stag = 0;
804 int ret = 0;
805
806 php = to_iwch_pd(pd);
807 rhp = php->rhp;
808 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
809 if (!mhp)
810 goto err;
811
812 mhp->rhp = rhp;
813 ret = iwch_alloc_pbl(mhp, pbl_depth);
814 if (ret)
815 goto err1;
816 mhp->attr.pbl_size = pbl_depth;
817 ret = cxio_allocate_stag(&rhp->rdev, &stag, php->pdid,
818 mhp->attr.pbl_size, mhp->attr.pbl_addr);
819 if (ret)
820 goto err2;
821 mhp->attr.pdid = php->pdid;
822 mhp->attr.type = TPT_NON_SHARED_MR;
823 mhp->attr.stag = stag;
824 mhp->attr.state = 1;
825 mmid = (stag) >> 8;
826 mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
827 if (insert_handle(rhp, &rhp->mmidr, mhp, mmid))
828 goto err3;
829
830 PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __func__, mmid, mhp, stag);
831 return &(mhp->ibmr);
832 err3:
833 cxio_dereg_mem(&rhp->rdev, stag, mhp->attr.pbl_size,
834 mhp->attr.pbl_addr);
835 err2:
836 iwch_free_pbl(mhp);
837 err1:
838 kfree(mhp);
839 err:
840 return ERR_PTR(ret);
841 }
842
iwch_alloc_fastreg_pbl(struct ib_device * device,int page_list_len)843 static struct ib_fast_reg_page_list *iwch_alloc_fastreg_pbl(
844 struct ib_device *device,
845 int page_list_len)
846 {
847 struct ib_fast_reg_page_list *page_list;
848
849 page_list = kmalloc(sizeof *page_list + page_list_len * sizeof(u64),
850 GFP_KERNEL);
851 if (!page_list)
852 return ERR_PTR(-ENOMEM);
853
854 page_list->page_list = (u64 *)(page_list + 1);
855 page_list->max_page_list_len = page_list_len;
856
857 return page_list;
858 }
859
iwch_free_fastreg_pbl(struct ib_fast_reg_page_list * page_list)860 static void iwch_free_fastreg_pbl(struct ib_fast_reg_page_list *page_list)
861 {
862 kfree(page_list);
863 }
864
iwch_destroy_qp(struct ib_qp * ib_qp)865 static int iwch_destroy_qp(struct ib_qp *ib_qp)
866 {
867 struct iwch_dev *rhp;
868 struct iwch_qp *qhp;
869 struct iwch_qp_attributes attrs;
870 struct iwch_ucontext *ucontext;
871
872 qhp = to_iwch_qp(ib_qp);
873 rhp = qhp->rhp;
874
875 attrs.next_state = IWCH_QP_STATE_ERROR;
876 iwch_modify_qp(rhp, qhp, IWCH_QP_ATTR_NEXT_STATE, &attrs, 0);
877 wait_event(qhp->wait, !qhp->ep);
878
879 remove_handle(rhp, &rhp->qpidr, qhp->wq.qpid);
880
881 atomic_dec(&qhp->refcnt);
882 wait_event(qhp->wait, !atomic_read(&qhp->refcnt));
883
884 ucontext = ib_qp->uobject ? to_iwch_ucontext(ib_qp->uobject->context)
885 : NULL;
886 cxio_destroy_qp(&rhp->rdev, &qhp->wq,
887 ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
888
889 PDBG("%s ib_qp %p qpid 0x%0x qhp %p\n", __func__,
890 ib_qp, qhp->wq.qpid, qhp);
891 kfree(qhp);
892 return 0;
893 }
894
iwch_create_qp(struct ib_pd * pd,struct ib_qp_init_attr * attrs,struct ib_udata * udata)895 static struct ib_qp *iwch_create_qp(struct ib_pd *pd,
896 struct ib_qp_init_attr *attrs,
897 struct ib_udata *udata)
898 {
899 struct iwch_dev *rhp;
900 struct iwch_qp *qhp;
901 struct iwch_pd *php;
902 struct iwch_cq *schp;
903 struct iwch_cq *rchp;
904 struct iwch_create_qp_resp uresp;
905 int wqsize, sqsize, rqsize;
906 struct iwch_ucontext *ucontext;
907
908 PDBG("%s ib_pd %p\n", __func__, pd);
909 if (attrs->qp_type != IB_QPT_RC)
910 return ERR_PTR(-EINVAL);
911 php = to_iwch_pd(pd);
912 rhp = php->rhp;
913 schp = get_chp(rhp, ((struct iwch_cq *) attrs->send_cq)->cq.cqid);
914 rchp = get_chp(rhp, ((struct iwch_cq *) attrs->recv_cq)->cq.cqid);
915 if (!schp || !rchp)
916 return ERR_PTR(-EINVAL);
917
918 /* The RQT size must be # of entries + 1 rounded up to a power of two */
919 rqsize = roundup_pow_of_two(attrs->cap.max_recv_wr);
920 if (rqsize == attrs->cap.max_recv_wr)
921 rqsize = roundup_pow_of_two(attrs->cap.max_recv_wr+1);
922
923 /* T3 doesn't support RQT depth < 16 */
924 if (rqsize < 16)
925 rqsize = 16;
926
927 if (rqsize > T3_MAX_RQ_SIZE)
928 return ERR_PTR(-EINVAL);
929
930 if (attrs->cap.max_inline_data > T3_MAX_INLINE)
931 return ERR_PTR(-EINVAL);
932
933 /*
934 * NOTE: The SQ and total WQ sizes don't need to be
935 * a power of two. However, all the code assumes
936 * they are. EG: Q_FREECNT() and friends.
937 */
938 sqsize = roundup_pow_of_two(attrs->cap.max_send_wr);
939 wqsize = roundup_pow_of_two(rqsize + sqsize);
940
941 /*
942 * Kernel users need more wq space for fastreg WRs which can take
943 * 2 WR fragments.
944 */
945 ucontext = pd->uobject ? to_iwch_ucontext(pd->uobject->context) : NULL;
946 if (!ucontext && wqsize < (rqsize + (2 * sqsize)))
947 wqsize = roundup_pow_of_two(rqsize +
948 roundup_pow_of_two(attrs->cap.max_send_wr * 2));
949 PDBG("%s wqsize %d sqsize %d rqsize %d\n", __func__,
950 wqsize, sqsize, rqsize);
951 qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
952 if (!qhp)
953 return ERR_PTR(-ENOMEM);
954 qhp->wq.size_log2 = ilog2(wqsize);
955 qhp->wq.rq_size_log2 = ilog2(rqsize);
956 qhp->wq.sq_size_log2 = ilog2(sqsize);
957 if (cxio_create_qp(&rhp->rdev, !udata, &qhp->wq,
958 ucontext ? &ucontext->uctx : &rhp->rdev.uctx)) {
959 kfree(qhp);
960 return ERR_PTR(-ENOMEM);
961 }
962
963 attrs->cap.max_recv_wr = rqsize - 1;
964 attrs->cap.max_send_wr = sqsize;
965 attrs->cap.max_inline_data = T3_MAX_INLINE;
966
967 qhp->rhp = rhp;
968 qhp->attr.pd = php->pdid;
969 qhp->attr.scq = ((struct iwch_cq *) attrs->send_cq)->cq.cqid;
970 qhp->attr.rcq = ((struct iwch_cq *) attrs->recv_cq)->cq.cqid;
971 qhp->attr.sq_num_entries = attrs->cap.max_send_wr;
972 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr;
973 qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
974 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
975 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge;
976 qhp->attr.state = IWCH_QP_STATE_IDLE;
977 qhp->attr.next_state = IWCH_QP_STATE_IDLE;
978
979 /*
980 * XXX - These don't get passed in from the openib user
981 * at create time. The CM sets them via a QP modify.
982 * Need to fix... I think the CM should
983 */
984 qhp->attr.enable_rdma_read = 1;
985 qhp->attr.enable_rdma_write = 1;
986 qhp->attr.enable_bind = 1;
987 qhp->attr.max_ord = 1;
988 qhp->attr.max_ird = 1;
989
990 spin_lock_init(&qhp->lock);
991 init_waitqueue_head(&qhp->wait);
992 atomic_set(&qhp->refcnt, 1);
993
994 if (insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.qpid)) {
995 cxio_destroy_qp(&rhp->rdev, &qhp->wq,
996 ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
997 kfree(qhp);
998 return ERR_PTR(-ENOMEM);
999 }
1000
1001 if (udata) {
1002
1003 struct iwch_mm_entry *mm1, *mm2;
1004
1005 mm1 = kmalloc(sizeof *mm1, GFP_KERNEL);
1006 if (!mm1) {
1007 iwch_destroy_qp(&qhp->ibqp);
1008 return ERR_PTR(-ENOMEM);
1009 }
1010
1011 mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
1012 if (!mm2) {
1013 kfree(mm1);
1014 iwch_destroy_qp(&qhp->ibqp);
1015 return ERR_PTR(-ENOMEM);
1016 }
1017
1018 uresp.qpid = qhp->wq.qpid;
1019 uresp.size_log2 = qhp->wq.size_log2;
1020 uresp.sq_size_log2 = qhp->wq.sq_size_log2;
1021 uresp.rq_size_log2 = qhp->wq.rq_size_log2;
1022 spin_lock(&ucontext->mmap_lock);
1023 uresp.key = ucontext->key;
1024 ucontext->key += PAGE_SIZE;
1025 uresp.db_key = ucontext->key;
1026 ucontext->key += PAGE_SIZE;
1027 spin_unlock(&ucontext->mmap_lock);
1028 if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
1029 kfree(mm1);
1030 kfree(mm2);
1031 iwch_destroy_qp(&qhp->ibqp);
1032 return ERR_PTR(-EFAULT);
1033 }
1034 mm1->key = uresp.key;
1035 mm1->addr = virt_to_phys(qhp->wq.queue);
1036 mm1->len = PAGE_ALIGN(wqsize * sizeof (union t3_wr));
1037 insert_mmap(ucontext, mm1);
1038 mm2->key = uresp.db_key;
1039 mm2->addr = qhp->wq.udb & PAGE_MASK;
1040 mm2->len = PAGE_SIZE;
1041 insert_mmap(ucontext, mm2);
1042 }
1043 qhp->ibqp.qp_num = qhp->wq.qpid;
1044 init_timer(&(qhp->timer));
1045 PDBG("%s sq_num_entries %d, rq_num_entries %d "
1046 "qpid 0x%0x qhp %p dma_addr 0x%llx size %d rq_addr 0x%x\n",
1047 __func__, qhp->attr.sq_num_entries, qhp->attr.rq_num_entries,
1048 qhp->wq.qpid, qhp, (unsigned long long) qhp->wq.dma_addr,
1049 1 << qhp->wq.size_log2, qhp->wq.rq_addr);
1050 return &qhp->ibqp;
1051 }
1052
iwch_ib_modify_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int attr_mask,struct ib_udata * udata)1053 static int iwch_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1054 int attr_mask, struct ib_udata *udata)
1055 {
1056 struct iwch_dev *rhp;
1057 struct iwch_qp *qhp;
1058 enum iwch_qp_attr_mask mask = 0;
1059 struct iwch_qp_attributes attrs;
1060
1061 PDBG("%s ib_qp %p\n", __func__, ibqp);
1062
1063 /* iwarp does not support the RTR state */
1064 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR))
1065 attr_mask &= ~IB_QP_STATE;
1066
1067 /* Make sure we still have something left to do */
1068 if (!attr_mask)
1069 return 0;
1070
1071 memset(&attrs, 0, sizeof attrs);
1072 qhp = to_iwch_qp(ibqp);
1073 rhp = qhp->rhp;
1074
1075 attrs.next_state = iwch_convert_state(attr->qp_state);
1076 attrs.enable_rdma_read = (attr->qp_access_flags &
1077 IB_ACCESS_REMOTE_READ) ? 1 : 0;
1078 attrs.enable_rdma_write = (attr->qp_access_flags &
1079 IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
1080 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0;
1081
1082
1083 mask |= (attr_mask & IB_QP_STATE) ? IWCH_QP_ATTR_NEXT_STATE : 0;
1084 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ?
1085 (IWCH_QP_ATTR_ENABLE_RDMA_READ |
1086 IWCH_QP_ATTR_ENABLE_RDMA_WRITE |
1087 IWCH_QP_ATTR_ENABLE_RDMA_BIND) : 0;
1088
1089 return iwch_modify_qp(rhp, qhp, mask, &attrs, 0);
1090 }
1091
iwch_qp_add_ref(struct ib_qp * qp)1092 void iwch_qp_add_ref(struct ib_qp *qp)
1093 {
1094 PDBG("%s ib_qp %p\n", __func__, qp);
1095 atomic_inc(&(to_iwch_qp(qp)->refcnt));
1096 }
1097
iwch_qp_rem_ref(struct ib_qp * qp)1098 void iwch_qp_rem_ref(struct ib_qp *qp)
1099 {
1100 PDBG("%s ib_qp %p\n", __func__, qp);
1101 if (atomic_dec_and_test(&(to_iwch_qp(qp)->refcnt)))
1102 wake_up(&(to_iwch_qp(qp)->wait));
1103 }
1104
iwch_get_qp(struct ib_device * dev,int qpn)1105 static struct ib_qp *iwch_get_qp(struct ib_device *dev, int qpn)
1106 {
1107 PDBG("%s ib_dev %p qpn 0x%x\n", __func__, dev, qpn);
1108 return (struct ib_qp *)get_qhp(to_iwch_dev(dev), qpn);
1109 }
1110
1111
iwch_query_pkey(struct ib_device * ibdev,u8 port,u16 index,u16 * pkey)1112 static int iwch_query_pkey(struct ib_device *ibdev,
1113 u8 port, u16 index, u16 * pkey)
1114 {
1115 PDBG("%s ibdev %p\n", __func__, ibdev);
1116 *pkey = 0;
1117 return 0;
1118 }
1119
iwch_query_gid(struct ib_device * ibdev,u8 port,int index,union ib_gid * gid)1120 static int iwch_query_gid(struct ib_device *ibdev, u8 port,
1121 int index, union ib_gid *gid)
1122 {
1123 struct iwch_dev *dev;
1124
1125 PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
1126 __func__, ibdev, port, index, gid);
1127 dev = to_iwch_dev(ibdev);
1128 BUG_ON(port == 0 || port > 2);
1129 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
1130 memcpy(&(gid->raw[0]), dev->rdev.port_info.lldevs[port-1]->dev_addr, 6);
1131 return 0;
1132 }
1133
fw_vers_string_to_u64(struct iwch_dev * iwch_dev)1134 static u64 fw_vers_string_to_u64(struct iwch_dev *iwch_dev)
1135 {
1136 struct ethtool_drvinfo info;
1137 struct net_device *lldev = iwch_dev->rdev.t3cdev_p->lldev;
1138 char *cp, *next;
1139 unsigned fw_maj, fw_min, fw_mic;
1140
1141 lldev->ethtool_ops->get_drvinfo(lldev, &info);
1142
1143 next = info.fw_version + 1;
1144 cp = strsep(&next, ".");
1145 sscanf(cp, "%i", &fw_maj);
1146 cp = strsep(&next, ".");
1147 sscanf(cp, "%i", &fw_min);
1148 cp = strsep(&next, ".");
1149 sscanf(cp, "%i", &fw_mic);
1150
1151 return (((u64)fw_maj & 0xffff) << 32) | ((fw_min & 0xffff) << 16) |
1152 (fw_mic & 0xffff);
1153 }
1154
iwch_query_device(struct ib_device * ibdev,struct ib_device_attr * props)1155 static int iwch_query_device(struct ib_device *ibdev,
1156 struct ib_device_attr *props)
1157 {
1158
1159 struct iwch_dev *dev;
1160 PDBG("%s ibdev %p\n", __func__, ibdev);
1161
1162 dev = to_iwch_dev(ibdev);
1163 memset(props, 0, sizeof *props);
1164 memcpy(&props->sys_image_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
1165 props->hw_ver = dev->rdev.t3cdev_p->type;
1166 props->fw_ver = fw_vers_string_to_u64(dev);
1167 props->device_cap_flags = dev->device_cap_flags;
1168 props->page_size_cap = dev->attr.mem_pgsizes_bitmask;
1169 props->vendor_id = (u32)dev->rdev.rnic_info.pdev->vendor;
1170 props->vendor_part_id = (u32)dev->rdev.rnic_info.pdev->device;
1171 props->max_mr_size = dev->attr.max_mr_size;
1172 props->max_qp = dev->attr.max_qps;
1173 props->max_qp_wr = dev->attr.max_wrs;
1174 props->max_sge = dev->attr.max_sge_per_wr;
1175 props->max_sge_rd = 1;
1176 props->max_qp_rd_atom = dev->attr.max_rdma_reads_per_qp;
1177 props->max_qp_init_rd_atom = dev->attr.max_rdma_reads_per_qp;
1178 props->max_cq = dev->attr.max_cqs;
1179 props->max_cqe = dev->attr.max_cqes_per_cq;
1180 props->max_mr = dev->attr.max_mem_regs;
1181 props->max_pd = dev->attr.max_pds;
1182 props->local_ca_ack_delay = 0;
1183 props->max_fast_reg_page_list_len = T3_MAX_FASTREG_DEPTH;
1184
1185 return 0;
1186 }
1187
iwch_query_port(struct ib_device * ibdev,u8 port,struct ib_port_attr * props)1188 static int iwch_query_port(struct ib_device *ibdev,
1189 u8 port, struct ib_port_attr *props)
1190 {
1191 struct iwch_dev *dev;
1192 struct net_device *netdev;
1193 struct in_device *inetdev;
1194
1195 PDBG("%s ibdev %p\n", __func__, ibdev);
1196
1197 dev = to_iwch_dev(ibdev);
1198 netdev = dev->rdev.port_info.lldevs[port-1];
1199
1200 memset(props, 0, sizeof(struct ib_port_attr));
1201 props->max_mtu = IB_MTU_4096;
1202 if (netdev->mtu >= 4096)
1203 props->active_mtu = IB_MTU_4096;
1204 else if (netdev->mtu >= 2048)
1205 props->active_mtu = IB_MTU_2048;
1206 else if (netdev->mtu >= 1024)
1207 props->active_mtu = IB_MTU_1024;
1208 else if (netdev->mtu >= 512)
1209 props->active_mtu = IB_MTU_512;
1210 else
1211 props->active_mtu = IB_MTU_256;
1212
1213 if (!netif_carrier_ok(netdev))
1214 props->state = IB_PORT_DOWN;
1215 else {
1216 inetdev = in_dev_get(netdev);
1217 if (inetdev) {
1218 if (inetdev->ifa_list)
1219 props->state = IB_PORT_ACTIVE;
1220 else
1221 props->state = IB_PORT_INIT;
1222 in_dev_put(inetdev);
1223 } else
1224 props->state = IB_PORT_INIT;
1225 }
1226
1227 props->port_cap_flags =
1228 IB_PORT_CM_SUP |
1229 IB_PORT_SNMP_TUNNEL_SUP |
1230 IB_PORT_REINIT_SUP |
1231 IB_PORT_DEVICE_MGMT_SUP |
1232 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
1233 props->gid_tbl_len = 1;
1234 props->pkey_tbl_len = 1;
1235 props->active_width = 2;
1236 props->active_speed = 2;
1237 props->max_msg_sz = -1;
1238
1239 return 0;
1240 }
1241
show_rev(struct device * dev,struct device_attribute * attr,char * buf)1242 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
1243 char *buf)
1244 {
1245 struct iwch_dev *iwch_dev = container_of(dev, struct iwch_dev,
1246 ibdev.dev);
1247 PDBG("%s dev 0x%p\n", __func__, dev);
1248 return sprintf(buf, "%d\n", iwch_dev->rdev.t3cdev_p->type);
1249 }
1250
show_fw_ver(struct device * dev,struct device_attribute * attr,char * buf)1251 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr, char *buf)
1252 {
1253 struct iwch_dev *iwch_dev = container_of(dev, struct iwch_dev,
1254 ibdev.dev);
1255 struct ethtool_drvinfo info;
1256 struct net_device *lldev = iwch_dev->rdev.t3cdev_p->lldev;
1257
1258 PDBG("%s dev 0x%p\n", __func__, dev);
1259 lldev->ethtool_ops->get_drvinfo(lldev, &info);
1260 return sprintf(buf, "%s\n", info.fw_version);
1261 }
1262
show_hca(struct device * dev,struct device_attribute * attr,char * buf)1263 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
1264 char *buf)
1265 {
1266 struct iwch_dev *iwch_dev = container_of(dev, struct iwch_dev,
1267 ibdev.dev);
1268 struct ethtool_drvinfo info;
1269 struct net_device *lldev = iwch_dev->rdev.t3cdev_p->lldev;
1270
1271 PDBG("%s dev 0x%p\n", __func__, dev);
1272 lldev->ethtool_ops->get_drvinfo(lldev, &info);
1273 return sprintf(buf, "%s\n", info.driver);
1274 }
1275
show_board(struct device * dev,struct device_attribute * attr,char * buf)1276 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
1277 char *buf)
1278 {
1279 struct iwch_dev *iwch_dev = container_of(dev, struct iwch_dev,
1280 ibdev.dev);
1281 PDBG("%s dev 0x%p\n", __func__, dev);
1282 return sprintf(buf, "%x.%x\n", iwch_dev->rdev.rnic_info.pdev->vendor,
1283 iwch_dev->rdev.rnic_info.pdev->device);
1284 }
1285
iwch_get_mib(struct ib_device * ibdev,union rdma_protocol_stats * stats)1286 static int iwch_get_mib(struct ib_device *ibdev,
1287 union rdma_protocol_stats *stats)
1288 {
1289 struct iwch_dev *dev;
1290 struct tp_mib_stats m;
1291 int ret;
1292
1293 PDBG("%s ibdev %p\n", __func__, ibdev);
1294 dev = to_iwch_dev(ibdev);
1295 ret = dev->rdev.t3cdev_p->ctl(dev->rdev.t3cdev_p, RDMA_GET_MIB, &m);
1296 if (ret)
1297 return -ENOSYS;
1298
1299 memset(stats, 0, sizeof *stats);
1300 stats->iw.ipInReceives = ((u64) m.ipInReceive_hi << 32) +
1301 m.ipInReceive_lo;
1302 stats->iw.ipInHdrErrors = ((u64) m.ipInHdrErrors_hi << 32) +
1303 m.ipInHdrErrors_lo;
1304 stats->iw.ipInAddrErrors = ((u64) m.ipInAddrErrors_hi << 32) +
1305 m.ipInAddrErrors_lo;
1306 stats->iw.ipInUnknownProtos = ((u64) m.ipInUnknownProtos_hi << 32) +
1307 m.ipInUnknownProtos_lo;
1308 stats->iw.ipInDiscards = ((u64) m.ipInDiscards_hi << 32) +
1309 m.ipInDiscards_lo;
1310 stats->iw.ipInDelivers = ((u64) m.ipInDelivers_hi << 32) +
1311 m.ipInDelivers_lo;
1312 stats->iw.ipOutRequests = ((u64) m.ipOutRequests_hi << 32) +
1313 m.ipOutRequests_lo;
1314 stats->iw.ipOutDiscards = ((u64) m.ipOutDiscards_hi << 32) +
1315 m.ipOutDiscards_lo;
1316 stats->iw.ipOutNoRoutes = ((u64) m.ipOutNoRoutes_hi << 32) +
1317 m.ipOutNoRoutes_lo;
1318 stats->iw.ipReasmTimeout = (u64) m.ipReasmTimeout;
1319 stats->iw.ipReasmReqds = (u64) m.ipReasmReqds;
1320 stats->iw.ipReasmOKs = (u64) m.ipReasmOKs;
1321 stats->iw.ipReasmFails = (u64) m.ipReasmFails;
1322 stats->iw.tcpActiveOpens = (u64) m.tcpActiveOpens;
1323 stats->iw.tcpPassiveOpens = (u64) m.tcpPassiveOpens;
1324 stats->iw.tcpAttemptFails = (u64) m.tcpAttemptFails;
1325 stats->iw.tcpEstabResets = (u64) m.tcpEstabResets;
1326 stats->iw.tcpOutRsts = (u64) m.tcpOutRsts;
1327 stats->iw.tcpCurrEstab = (u64) m.tcpCurrEstab;
1328 stats->iw.tcpInSegs = ((u64) m.tcpInSegs_hi << 32) +
1329 m.tcpInSegs_lo;
1330 stats->iw.tcpOutSegs = ((u64) m.tcpOutSegs_hi << 32) +
1331 m.tcpOutSegs_lo;
1332 stats->iw.tcpRetransSegs = ((u64) m.tcpRetransSeg_hi << 32) +
1333 m.tcpRetransSeg_lo;
1334 stats->iw.tcpInErrs = ((u64) m.tcpInErrs_hi << 32) +
1335 m.tcpInErrs_lo;
1336 stats->iw.tcpRtoMin = (u64) m.tcpRtoMin;
1337 stats->iw.tcpRtoMax = (u64) m.tcpRtoMax;
1338 return 0;
1339 }
1340
1341 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1342 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
1343 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1344 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
1345
1346 static struct device_attribute *iwch_class_attributes[] = {
1347 &dev_attr_hw_rev,
1348 &dev_attr_fw_ver,
1349 &dev_attr_hca_type,
1350 &dev_attr_board_id,
1351 };
1352
iwch_register_device(struct iwch_dev * dev)1353 int iwch_register_device(struct iwch_dev *dev)
1354 {
1355 int ret;
1356 int i;
1357
1358 PDBG("%s iwch_dev %p\n", __func__, dev);
1359 strlcpy(dev->ibdev.name, "cxgb3_%d", IB_DEVICE_NAME_MAX);
1360 memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
1361 memcpy(&dev->ibdev.node_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
1362 dev->ibdev.owner = THIS_MODULE;
1363 dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY |
1364 IB_DEVICE_MEM_WINDOW |
1365 IB_DEVICE_MEM_MGT_EXTENSIONS;
1366
1367 /* cxgb3 supports STag 0. */
1368 dev->ibdev.local_dma_lkey = 0;
1369
1370 dev->ibdev.uverbs_cmd_mask =
1371 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
1372 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
1373 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
1374 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
1375 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
1376 (1ull << IB_USER_VERBS_CMD_REG_MR) |
1377 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
1378 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1379 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
1380 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
1381 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
1382 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
1383 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
1384 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
1385 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
1386 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
1387 (1ull << IB_USER_VERBS_CMD_POST_RECV);
1388 dev->ibdev.node_type = RDMA_NODE_RNIC;
1389 memcpy(dev->ibdev.node_desc, IWCH_NODE_DESC, sizeof(IWCH_NODE_DESC));
1390 dev->ibdev.phys_port_cnt = dev->rdev.port_info.nports;
1391 dev->ibdev.num_comp_vectors = 1;
1392 dev->ibdev.dma_device = &(dev->rdev.rnic_info.pdev->dev);
1393 dev->ibdev.query_device = iwch_query_device;
1394 dev->ibdev.query_port = iwch_query_port;
1395 dev->ibdev.modify_port = iwch_modify_port;
1396 dev->ibdev.query_pkey = iwch_query_pkey;
1397 dev->ibdev.query_gid = iwch_query_gid;
1398 dev->ibdev.alloc_ucontext = iwch_alloc_ucontext;
1399 dev->ibdev.dealloc_ucontext = iwch_dealloc_ucontext;
1400 dev->ibdev.mmap = iwch_mmap;
1401 dev->ibdev.alloc_pd = iwch_allocate_pd;
1402 dev->ibdev.dealloc_pd = iwch_deallocate_pd;
1403 dev->ibdev.create_ah = iwch_ah_create;
1404 dev->ibdev.destroy_ah = iwch_ah_destroy;
1405 dev->ibdev.create_qp = iwch_create_qp;
1406 dev->ibdev.modify_qp = iwch_ib_modify_qp;
1407 dev->ibdev.destroy_qp = iwch_destroy_qp;
1408 dev->ibdev.create_cq = iwch_create_cq;
1409 dev->ibdev.destroy_cq = iwch_destroy_cq;
1410 dev->ibdev.resize_cq = iwch_resize_cq;
1411 dev->ibdev.poll_cq = iwch_poll_cq;
1412 dev->ibdev.get_dma_mr = iwch_get_dma_mr;
1413 dev->ibdev.reg_phys_mr = iwch_register_phys_mem;
1414 dev->ibdev.rereg_phys_mr = iwch_reregister_phys_mem;
1415 dev->ibdev.reg_user_mr = iwch_reg_user_mr;
1416 dev->ibdev.dereg_mr = iwch_dereg_mr;
1417 dev->ibdev.alloc_mw = iwch_alloc_mw;
1418 dev->ibdev.bind_mw = iwch_bind_mw;
1419 dev->ibdev.dealloc_mw = iwch_dealloc_mw;
1420 dev->ibdev.alloc_fast_reg_mr = iwch_alloc_fast_reg_mr;
1421 dev->ibdev.alloc_fast_reg_page_list = iwch_alloc_fastreg_pbl;
1422 dev->ibdev.free_fast_reg_page_list = iwch_free_fastreg_pbl;
1423 dev->ibdev.attach_mcast = iwch_multicast_attach;
1424 dev->ibdev.detach_mcast = iwch_multicast_detach;
1425 dev->ibdev.process_mad = iwch_process_mad;
1426 dev->ibdev.req_notify_cq = iwch_arm_cq;
1427 dev->ibdev.post_send = iwch_post_send;
1428 dev->ibdev.post_recv = iwch_post_receive;
1429 dev->ibdev.get_protocol_stats = iwch_get_mib;
1430 dev->ibdev.uverbs_abi_ver = IWCH_UVERBS_ABI_VERSION;
1431
1432 dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
1433 if (!dev->ibdev.iwcm)
1434 return -ENOMEM;
1435
1436 dev->ibdev.iwcm->connect = iwch_connect;
1437 dev->ibdev.iwcm->accept = iwch_accept_cr;
1438 dev->ibdev.iwcm->reject = iwch_reject_cr;
1439 dev->ibdev.iwcm->create_listen = iwch_create_listen;
1440 dev->ibdev.iwcm->destroy_listen = iwch_destroy_listen;
1441 dev->ibdev.iwcm->add_ref = iwch_qp_add_ref;
1442 dev->ibdev.iwcm->rem_ref = iwch_qp_rem_ref;
1443 dev->ibdev.iwcm->get_qp = iwch_get_qp;
1444
1445 ret = ib_register_device(&dev->ibdev, NULL);
1446 if (ret)
1447 goto bail1;
1448
1449 for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i) {
1450 ret = device_create_file(&dev->ibdev.dev,
1451 iwch_class_attributes[i]);
1452 if (ret) {
1453 goto bail2;
1454 }
1455 }
1456 return 0;
1457 bail2:
1458 ib_unregister_device(&dev->ibdev);
1459 bail1:
1460 kfree(dev->ibdev.iwcm);
1461 return ret;
1462 }
1463
iwch_unregister_device(struct iwch_dev * dev)1464 void iwch_unregister_device(struct iwch_dev *dev)
1465 {
1466 int i;
1467
1468 PDBG("%s iwch_dev %p\n", __func__, dev);
1469 for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i)
1470 device_remove_file(&dev->ibdev.dev,
1471 iwch_class_attributes[i]);
1472 ib_unregister_device(&dev->ibdev);
1473 kfree(dev->ibdev.iwcm);
1474 return;
1475 }
1476