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