?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
staging: brcm80211: assure common sources are truly common
[zen-stable.git] / drivers / infiniband / hw / amso1100 / c2_provider.c
blobaeebc4d37e3365d35dcb34653f99f8313ea66dc5
1 /*
2 * Copyright (c) 2005 Ammasso, Inc. All rights reserved.
3 * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 *
33 */
34
35 #include <linux/module.h>
36 #include <linux/moduleparam.h>
37 #include <linux/pci.h>
38 #include <linux/netdevice.h>
39 #include <linux/etherdevice.h>
40 #include <linux/inetdevice.h>
41 #include <linux/delay.h>
42 #include <linux/ethtool.h>
43 #include <linux/mii.h>
44 #include <linux/if_vlan.h>
45 #include <linux/crc32.h>
46 #include <linux/in.h>
47 #include <linux/ip.h>
48 #include <linux/tcp.h>
49 #include <linux/init.h>
50 #include <linux/dma-mapping.h>
51 #include <linux/if_arp.h>
52 #include <linux/vmalloc.h>
53 #include <linux/slab.h>
54
55 #include <asm/io.h>
56 #include <asm/irq.h>
57 #include <asm/byteorder.h>
58
59 #include <rdma/ib_smi.h>
60 #include <rdma/ib_umem.h>
61 #include <rdma/ib_user_verbs.h>
62 #include "c2.h"
63 #include "c2_provider.h"
64 #include "c2_user.h"
65
66 static int c2_query_device(struct ib_device *ibdev,
67 struct ib_device_attr *props)
68 {
69 struct c2_dev *c2dev = to_c2dev(ibdev);
70
71 pr_debug("%s:%u\n", __func__, __LINE__);
72
73 *props = c2dev->props;
74 return 0;
75 }
76
77 static int c2_query_port(struct ib_device *ibdev,
78 u8 port, struct ib_port_attr *props)
79 {
80 pr_debug("%s:%u\n", __func__, __LINE__);
81
82 props->max_mtu = IB_MTU_4096;
83 props->lid = 0;
84 props->lmc = 0;
85 props->sm_lid = 0;
86 props->sm_sl = 0;
87 props->state = IB_PORT_ACTIVE;
88 props->phys_state = 0;
89 props->port_cap_flags =
90 IB_PORT_CM_SUP |
91 IB_PORT_REINIT_SUP |
92 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
93 props->gid_tbl_len = 1;
94 props->pkey_tbl_len = 1;
95 props->qkey_viol_cntr = 0;
96 props->active_width = 1;
97 props->active_speed = 1;
98
99 return 0;
100 }
101
102 static int c2_modify_port(struct ib_device *ibdev,
103 u8 port, int port_modify_mask,
104 struct ib_port_modify *props)
105 {
106 pr_debug("%s:%u\n", __func__, __LINE__);
107 return 0;
108 }
109
110 static int c2_query_pkey(struct ib_device *ibdev,
111 u8 port, u16 index, u16 * pkey)
112 {
113 pr_debug("%s:%u\n", __func__, __LINE__);
114 *pkey = 0;
115 return 0;
116 }
117
118 static int c2_query_gid(struct ib_device *ibdev, u8 port,
119 int index, union ib_gid *gid)
120 {
121 struct c2_dev *c2dev = to_c2dev(ibdev);
122
123 pr_debug("%s:%u\n", __func__, __LINE__);
124 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
125 memcpy(&(gid->raw[0]), c2dev->pseudo_netdev->dev_addr, 6);
126
127 return 0;
128 }
129
130 /* Allocate the user context data structure. This keeps track
131 * of all objects associated with a particular user-mode client.
132 */
133 static struct ib_ucontext *c2_alloc_ucontext(struct ib_device *ibdev,
134 struct ib_udata *udata)
135 {
136 struct c2_ucontext *context;
137
138 pr_debug("%s:%u\n", __func__, __LINE__);
139 context = kmalloc(sizeof(*context), GFP_KERNEL);
140 if (!context)
141 return ERR_PTR(-ENOMEM);
142
143 return &context->ibucontext;
144 }
145
146 static int c2_dealloc_ucontext(struct ib_ucontext *context)
147 {
148 pr_debug("%s:%u\n", __func__, __LINE__);
149 kfree(context);
150 return 0;
151 }
152
153 static int c2_mmap_uar(struct ib_ucontext *context, struct vm_area_struct *vma)
154 {
155 pr_debug("%s:%u\n", __func__, __LINE__);
156 return -ENOSYS;
157 }
158
159 static struct ib_pd *c2_alloc_pd(struct ib_device *ibdev,
160 struct ib_ucontext *context,
161 struct ib_udata *udata)
162 {
163 struct c2_pd *pd;
164 int err;
165
166 pr_debug("%s:%u\n", __func__, __LINE__);
167
168 pd = kmalloc(sizeof(*pd), GFP_KERNEL);
169 if (!pd)
170 return ERR_PTR(-ENOMEM);
171
172 err = c2_pd_alloc(to_c2dev(ibdev), !context, pd);
173 if (err) {
174 kfree(pd);
175 return ERR_PTR(err);
176 }
177
178 if (context) {
179 if (ib_copy_to_udata(udata, &pd->pd_id, sizeof(__u32))) {
180 c2_pd_free(to_c2dev(ibdev), pd);
181 kfree(pd);
182 return ERR_PTR(-EFAULT);
183 }
184 }
185
186 return &pd->ibpd;
187 }
188
189 static int c2_dealloc_pd(struct ib_pd *pd)
190 {
191 pr_debug("%s:%u\n", __func__, __LINE__);
192 c2_pd_free(to_c2dev(pd->device), to_c2pd(pd));
193 kfree(pd);
194
195 return 0;
196 }
197
198 static struct ib_ah *c2_ah_create(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
199 {
200 pr_debug("%s:%u\n", __func__, __LINE__);
201 return ERR_PTR(-ENOSYS);
202 }
203
204 static int c2_ah_destroy(struct ib_ah *ah)
205 {
206 pr_debug("%s:%u\n", __func__, __LINE__);
207 return -ENOSYS;
208 }
209
210 static void c2_add_ref(struct ib_qp *ibqp)
211 {
212 struct c2_qp *qp;
213 BUG_ON(!ibqp);
214 qp = to_c2qp(ibqp);
215 atomic_inc(&qp->refcount);
216 }
217
218 static void c2_rem_ref(struct ib_qp *ibqp)
219 {
220 struct c2_qp *qp;
221 BUG_ON(!ibqp);
222 qp = to_c2qp(ibqp);
223 if (atomic_dec_and_test(&qp->refcount))
224 wake_up(&qp->wait);
225 }
226
227 struct ib_qp *c2_get_qp(struct ib_device *device, int qpn)
228 {
229 struct c2_dev* c2dev = to_c2dev(device);
230 struct c2_qp *qp;
231
232 qp = c2_find_qpn(c2dev, qpn);
233 pr_debug("%s Returning QP=%p for QPN=%d, device=%p, refcount=%d\n",
234 __func__, qp, qpn, device,
235 (qp?atomic_read(&qp->refcount):0));
236
237 return (qp?&qp->ibqp:NULL);
238 }
239
240 static struct ib_qp *c2_create_qp(struct ib_pd *pd,
241 struct ib_qp_init_attr *init_attr,
242 struct ib_udata *udata)
243 {
244 struct c2_qp *qp;
245 int err;
246
247 pr_debug("%s:%u\n", __func__, __LINE__);
248
249 if (init_attr->create_flags)
250 return ERR_PTR(-EINVAL);
251
252 switch (init_attr->qp_type) {
253 case IB_QPT_RC:
254 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
255 if (!qp) {
256 pr_debug("%s: Unable to allocate QP\n", __func__);
257 return ERR_PTR(-ENOMEM);
258 }
259 spin_lock_init(&qp->lock);
260 if (pd->uobject) {
261 /* userspace specific */
262 }
263
264 err = c2_alloc_qp(to_c2dev(pd->device),
265 to_c2pd(pd), init_attr, qp);
266
267 if (err && pd->uobject) {
268 /* userspace specific */
269 }
270
271 break;
272 default:
273 pr_debug("%s: Invalid QP type: %d\n", __func__,
274 init_attr->qp_type);
275 return ERR_PTR(-EINVAL);
276 }
277
278 if (err) {
279 kfree(qp);
280 return ERR_PTR(err);
281 }
282
283 return &qp->ibqp;
284 }
285
286 static int c2_destroy_qp(struct ib_qp *ib_qp)
287 {
288 struct c2_qp *qp = to_c2qp(ib_qp);
289
290 pr_debug("%s:%u qp=%p,qp->state=%d\n",
291 __func__, __LINE__, ib_qp, qp->state);
292 c2_free_qp(to_c2dev(ib_qp->device), qp);
293 kfree(qp);
294 return 0;
295 }
296
297 static struct ib_cq *c2_create_cq(struct ib_device *ibdev, int entries, int vector,
298 struct ib_ucontext *context,
299 struct ib_udata *udata)
300 {
301 struct c2_cq *cq;
302 int err;
303
304 cq = kmalloc(sizeof(*cq), GFP_KERNEL);
305 if (!cq) {
306 pr_debug("%s: Unable to allocate CQ\n", __func__);
307 return ERR_PTR(-ENOMEM);
308 }
309
310 err = c2_init_cq(to_c2dev(ibdev), entries, NULL, cq);
311 if (err) {
312 pr_debug("%s: error initializing CQ\n", __func__);
313 kfree(cq);
314 return ERR_PTR(err);
315 }
316
317 return &cq->ibcq;
318 }
319
320 static int c2_destroy_cq(struct ib_cq *ib_cq)
321 {
322 struct c2_cq *cq = to_c2cq(ib_cq);
323
324 pr_debug("%s:%u\n", __func__, __LINE__);
325
326 c2_free_cq(to_c2dev(ib_cq->device), cq);
327 kfree(cq);
328
329 return 0;
330 }
331
332 static inline u32 c2_convert_access(int acc)
333 {
334 return (acc & IB_ACCESS_REMOTE_WRITE ? C2_ACF_REMOTE_WRITE : 0) |
335 (acc & IB_ACCESS_REMOTE_READ ? C2_ACF_REMOTE_READ : 0) |
336 (acc & IB_ACCESS_LOCAL_WRITE ? C2_ACF_LOCAL_WRITE : 0) |
337 C2_ACF_LOCAL_READ | C2_ACF_WINDOW_BIND;
338 }
339
340 static struct ib_mr *c2_reg_phys_mr(struct ib_pd *ib_pd,
341 struct ib_phys_buf *buffer_list,
342 int num_phys_buf, int acc, u64 * iova_start)
343 {
344 struct c2_mr *mr;
345 u64 *page_list;
346 u32 total_len;
347 int err, i, j, k, page_shift, pbl_depth;
348
349 pbl_depth = 0;
350 total_len = 0;
351
352 page_shift = PAGE_SHIFT;
353 /*
354 * If there is only 1 buffer we assume this could
355 * be a map of all phy mem...use a 32k page_shift.
356 */
357 if (num_phys_buf == 1)
358 page_shift += 3;
359
360 for (i = 0; i < num_phys_buf; i++) {
361
362 if (buffer_list[i].addr & ~PAGE_MASK) {
363 pr_debug("Unaligned Memory Buffer: 0x%x\n",
364 (unsigned int) buffer_list[i].addr);
365 return ERR_PTR(-EINVAL);
366 }
367
368 if (!buffer_list[i].size) {
369 pr_debug("Invalid Buffer Size\n");
370 return ERR_PTR(-EINVAL);
371 }
372
373 total_len += buffer_list[i].size;
374 pbl_depth += ALIGN(buffer_list[i].size,
375 (1 << page_shift)) >> page_shift;
376 }
377
378 page_list = vmalloc(sizeof(u64) * pbl_depth);
379 if (!page_list) {
380 pr_debug("couldn't vmalloc page_list of size %zd\n",
381 (sizeof(u64) * pbl_depth));
382 return ERR_PTR(-ENOMEM);
383 }
384
385 for (i = 0, j = 0; i < num_phys_buf; i++) {
386
387 int naddrs;
388
389 naddrs = ALIGN(buffer_list[i].size,
390 (1 << page_shift)) >> page_shift;
391 for (k = 0; k < naddrs; k++)
392 page_list[j++] = (buffer_list[i].addr +
393 (k << page_shift));
394 }
395
396 mr = kmalloc(sizeof(*mr), GFP_KERNEL);
397 if (!mr) {
398 vfree(page_list);
399 return ERR_PTR(-ENOMEM);
400 }
401
402 mr->pd = to_c2pd(ib_pd);
403 mr->umem = NULL;
404 pr_debug("%s - page shift %d, pbl_depth %d, total_len %u, "
405 "*iova_start %llx, first pa %llx, last pa %llx\n",
406 __func__, page_shift, pbl_depth, total_len,
407 (unsigned long long) *iova_start,
408 (unsigned long long) page_list[0],
409 (unsigned long long) page_list[pbl_depth-1]);
410 err = c2_nsmr_register_phys_kern(to_c2dev(ib_pd->device), page_list,
411 (1 << page_shift), pbl_depth,
412 total_len, 0, iova_start,
413 c2_convert_access(acc), mr);
414 vfree(page_list);
415 if (err) {
416 kfree(mr);
417 return ERR_PTR(err);
418 }
419
420 return &mr->ibmr;
421 }
422
423 static struct ib_mr *c2_get_dma_mr(struct ib_pd *pd, int acc)
424 {
425 struct ib_phys_buf bl;
426 u64 kva = 0;
427
428 pr_debug("%s:%u\n", __func__, __LINE__);
429
430 /* AMSO1100 limit */
431 bl.size = 0xffffffff;
432 bl.addr = 0;
433 return c2_reg_phys_mr(pd, &bl, 1, acc, &kva);
434 }
435
436 static struct ib_mr *c2_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
437 u64 virt, int acc, struct ib_udata *udata)
438 {
439 u64 *pages;
440 u64 kva = 0;
441 int shift, n, len;
442 int i, j, k;
443 int err = 0;
444 struct ib_umem_chunk *chunk;
445 struct c2_pd *c2pd = to_c2pd(pd);
446 struct c2_mr *c2mr;
447
448 pr_debug("%s:%u\n", __func__, __LINE__);
449
450 c2mr = kmalloc(sizeof(*c2mr), GFP_KERNEL);
451 if (!c2mr)
452 return ERR_PTR(-ENOMEM);
453 c2mr->pd = c2pd;
454
455 c2mr->umem = ib_umem_get(pd->uobject->context, start, length, acc, 0);
456 if (IS_ERR(c2mr->umem)) {
457 err = PTR_ERR(c2mr->umem);
458 kfree(c2mr);
459 return ERR_PTR(err);
460 }
461
462 shift = ffs(c2mr->umem->page_size) - 1;
463
464 n = 0;
465 list_for_each_entry(chunk, &c2mr->umem->chunk_list, list)
466 n += chunk->nents;
467
468 pages = kmalloc(n * sizeof(u64), GFP_KERNEL);
469 if (!pages) {
470 err = -ENOMEM;
471 goto err;
472 }
473
474 i = 0;
475 list_for_each_entry(chunk, &c2mr->umem->chunk_list, list) {
476 for (j = 0; j < chunk->nmap; ++j) {
477 len = sg_dma_len(&chunk->page_list[j]) >> shift;
478 for (k = 0; k < len; ++k) {
479 pages[i++] =
480 sg_dma_address(&chunk->page_list[j]) +
481 (c2mr->umem->page_size * k);
482 }
483 }
484 }
485
486 kva = virt;
487 err = c2_nsmr_register_phys_kern(to_c2dev(pd->device),
488 pages,
489 c2mr->umem->page_size,
490 i,
491 length,
492 c2mr->umem->offset,
493 &kva,
494 c2_convert_access(acc),
495 c2mr);
496 kfree(pages);
497 if (err)
498 goto err;
499 return &c2mr->ibmr;
500
501 err:
502 ib_umem_release(c2mr->umem);
503 kfree(c2mr);
504 return ERR_PTR(err);
505 }
506
507 static int c2_dereg_mr(struct ib_mr *ib_mr)
508 {
509 struct c2_mr *mr = to_c2mr(ib_mr);
510 int err;
511
512 pr_debug("%s:%u\n", __func__, __LINE__);
513
514 err = c2_stag_dealloc(to_c2dev(ib_mr->device), ib_mr->lkey);
515 if (err)
516 pr_debug("c2_stag_dealloc failed: %d\n", err);
517 else {
518 if (mr->umem)
519 ib_umem_release(mr->umem);
520 kfree(mr);
521 }
522
523 return err;
524 }
525
526 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
527 char *buf)
528 {
529 struct c2_dev *c2dev = container_of(dev, struct c2_dev, ibdev.dev);
530 pr_debug("%s:%u\n", __func__, __LINE__);
531 return sprintf(buf, "%x\n", c2dev->props.hw_ver);
532 }
533
534 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
535 char *buf)
536 {
537 struct c2_dev *c2dev = container_of(dev, struct c2_dev, ibdev.dev);
538 pr_debug("%s:%u\n", __func__, __LINE__);
539 return sprintf(buf, "%x.%x.%x\n",
540 (int) (c2dev->props.fw_ver >> 32),
541 (int) (c2dev->props.fw_ver >> 16) & 0xffff,
542 (int) (c2dev->props.fw_ver & 0xffff));
543 }
544
545 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
546 char *buf)
547 {
548 pr_debug("%s:%u\n", __func__, __LINE__);
549 return sprintf(buf, "AMSO1100\n");
550 }
551
552 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
553 char *buf)
554 {
555 pr_debug("%s:%u\n", __func__, __LINE__);
556 return sprintf(buf, "%.*s\n", 32, "AMSO1100 Board ID");
557 }
558
559 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
560 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
561 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
562 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
563
564 static struct device_attribute *c2_dev_attributes[] = {
565 &dev_attr_hw_rev,
566 &dev_attr_fw_ver,
567 &dev_attr_hca_type,
568 &dev_attr_board_id
569 };
570
571 static int c2_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
572 int attr_mask, struct ib_udata *udata)
573 {
574 int err;
575
576 err =
577 c2_qp_modify(to_c2dev(ibqp->device), to_c2qp(ibqp), attr,
578 attr_mask);
579
580 return err;
581 }
582
583 static int c2_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
584 {
585 pr_debug("%s:%u\n", __func__, __LINE__);
586 return -ENOSYS;
587 }
588
589 static int c2_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
590 {
591 pr_debug("%s:%u\n", __func__, __LINE__);
592 return -ENOSYS;
593 }
594
595 static int c2_process_mad(struct ib_device *ibdev,
596 int mad_flags,
597 u8 port_num,
598 struct ib_wc *in_wc,
599 struct ib_grh *in_grh,
600 struct ib_mad *in_mad, struct ib_mad *out_mad)
601 {
602 pr_debug("%s:%u\n", __func__, __LINE__);
603 return -ENOSYS;
604 }
605
606 static int c2_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
607 {
608 pr_debug("%s:%u\n", __func__, __LINE__);
609
610 /* Request a connection */
611 return c2_llp_connect(cm_id, iw_param);
612 }
613
614 static int c2_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
615 {
616 pr_debug("%s:%u\n", __func__, __LINE__);
617
618 /* Accept the new connection */
619 return c2_llp_accept(cm_id, iw_param);
620 }
621
622 static int c2_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
623 {
624 int err;
625
626 pr_debug("%s:%u\n", __func__, __LINE__);
627
628 err = c2_llp_reject(cm_id, pdata, pdata_len);
629 return err;
630 }
631
632 static int c2_service_create(struct iw_cm_id *cm_id, int backlog)
633 {
634 int err;
635
636 pr_debug("%s:%u\n", __func__, __LINE__);
637 err = c2_llp_service_create(cm_id, backlog);
638 pr_debug("%s:%u err=%d\n",
639 __func__, __LINE__,
640 err);
641 return err;
642 }
643
644 static int c2_service_destroy(struct iw_cm_id *cm_id)
645 {
646 int err;
647 pr_debug("%s:%u\n", __func__, __LINE__);
648
649 err = c2_llp_service_destroy(cm_id);
650
651 return err;
652 }
653
654 static int c2_pseudo_up(struct net_device *netdev)
655 {
656 struct in_device *ind;
657 struct c2_dev *c2dev = netdev->ml_priv;
658
659 ind = in_dev_get(netdev);
660 if (!ind)
661 return 0;
662
663 pr_debug("adding...\n");
664 for_ifa(ind) {
665 #ifdef DEBUG
666 u8 *ip = (u8 *) & ifa->ifa_address;
667
668 pr_debug("%s: %d.%d.%d.%d\n",
669 ifa->ifa_label, ip[0], ip[1], ip[2], ip[3]);
670 #endif
671 c2_add_addr(c2dev, ifa->ifa_address, ifa->ifa_mask);
672 }
673 endfor_ifa(ind);
674 in_dev_put(ind);
675
676 return 0;
677 }
678
679 static int c2_pseudo_down(struct net_device *netdev)
680 {
681 struct in_device *ind;
682 struct c2_dev *c2dev = netdev->ml_priv;
683
684 ind = in_dev_get(netdev);
685 if (!ind)
686 return 0;
687
688 pr_debug("deleting...\n");
689 for_ifa(ind) {
690 #ifdef DEBUG
691 u8 *ip = (u8 *) & ifa->ifa_address;
692
693 pr_debug("%s: %d.%d.%d.%d\n",
694 ifa->ifa_label, ip[0], ip[1], ip[2], ip[3]);
695 #endif
696 c2_del_addr(c2dev, ifa->ifa_address, ifa->ifa_mask);
697 }
698 endfor_ifa(ind);
699 in_dev_put(ind);
700
701 return 0;
702 }
703
704 static int c2_pseudo_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
705 {
706 kfree_skb(skb);
707 return NETDEV_TX_OK;
708 }
709
710 static int c2_pseudo_change_mtu(struct net_device *netdev, int new_mtu)
711 {
712 if (new_mtu < ETH_ZLEN || new_mtu > ETH_JUMBO_MTU)
713 return -EINVAL;
714
715 netdev->mtu = new_mtu;
716
717 /* TODO: Tell rnic about new rmda interface mtu */
718 return 0;
719 }
720
721 static const struct net_device_ops c2_pseudo_netdev_ops = {
722 .ndo_open = c2_pseudo_up,
723 .ndo_stop = c2_pseudo_down,
724 .ndo_start_xmit = c2_pseudo_xmit_frame,
725 .ndo_change_mtu = c2_pseudo_change_mtu,
726 .ndo_validate_addr = eth_validate_addr,
727 };
728
729 static void setup(struct net_device *netdev)
730 {
731 netdev->netdev_ops = &c2_pseudo_netdev_ops;
732
733 netdev->watchdog_timeo = 0;
734 netdev->type = ARPHRD_ETHER;
735 netdev->mtu = 1500;
736 netdev->hard_header_len = ETH_HLEN;
737 netdev->addr_len = ETH_ALEN;
738 netdev->tx_queue_len = 0;
739 netdev->flags |= IFF_NOARP;
740 }
741
742 static struct net_device *c2_pseudo_netdev_init(struct c2_dev *c2dev)
743 {
744 char name[IFNAMSIZ];
745 struct net_device *netdev;
746
747 /* change ethxxx to iwxxx */
748 strcpy(name, "iw");
749 strcat(name, &c2dev->netdev->name[3]);
750 netdev = alloc_netdev(0, name, setup);
751 if (!netdev) {
752 printk(KERN_ERR PFX "%s - etherdev alloc failed",
753 __func__);
754 return NULL;
755 }
756
757 netdev->ml_priv = c2dev;
758
759 SET_NETDEV_DEV(netdev, &c2dev->pcidev->dev);
760
761 memcpy_fromio(netdev->dev_addr, c2dev->kva + C2_REGS_RDMA_ENADDR, 6);
762
763 /* Print out the MAC address */
764 pr_debug("%s: MAC %02X:%02X:%02X:%02X:%02X:%02X\n",
765 netdev->name,
766 netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
767 netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);
768
769 #if 0
770 /* Disable network packets */
771 netif_stop_queue(netdev);
772 #endif
773 return netdev;
774 }
775
776 int c2_register_device(struct c2_dev *dev)
777 {
778 int ret = -ENOMEM;
779 int i;
780
781 /* Register pseudo network device */
782 dev->pseudo_netdev = c2_pseudo_netdev_init(dev);
783 if (!dev->pseudo_netdev)
784 goto out;
785
786 ret = register_netdev(dev->pseudo_netdev);
787 if (ret)
788 goto out_free_netdev;
789
790 pr_debug("%s:%u\n", __func__, __LINE__);
791 strlcpy(dev->ibdev.name, "amso%d", IB_DEVICE_NAME_MAX);
792 dev->ibdev.owner = THIS_MODULE;
793 dev->ibdev.uverbs_cmd_mask =
794 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
795 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
796 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
797 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
798 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
799 (1ull << IB_USER_VERBS_CMD_REG_MR) |
800 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
801 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
802 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
803 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
804 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
805 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
806 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
807 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
808 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
809 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
810 (1ull << IB_USER_VERBS_CMD_POST_RECV);
811
812 dev->ibdev.node_type = RDMA_NODE_RNIC;
813 memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
814 memcpy(&dev->ibdev.node_guid, dev->pseudo_netdev->dev_addr, 6);
815 dev->ibdev.phys_port_cnt = 1;
816 dev->ibdev.num_comp_vectors = 1;
817 dev->ibdev.dma_device = &dev->pcidev->dev;
818 dev->ibdev.query_device = c2_query_device;
819 dev->ibdev.query_port = c2_query_port;
820 dev->ibdev.modify_port = c2_modify_port;
821 dev->ibdev.query_pkey = c2_query_pkey;
822 dev->ibdev.query_gid = c2_query_gid;
823 dev->ibdev.alloc_ucontext = c2_alloc_ucontext;
824 dev->ibdev.dealloc_ucontext = c2_dealloc_ucontext;
825 dev->ibdev.mmap = c2_mmap_uar;
826 dev->ibdev.alloc_pd = c2_alloc_pd;
827 dev->ibdev.dealloc_pd = c2_dealloc_pd;
828 dev->ibdev.create_ah = c2_ah_create;
829 dev->ibdev.destroy_ah = c2_ah_destroy;
830 dev->ibdev.create_qp = c2_create_qp;
831 dev->ibdev.modify_qp = c2_modify_qp;
832 dev->ibdev.destroy_qp = c2_destroy_qp;
833 dev->ibdev.create_cq = c2_create_cq;
834 dev->ibdev.destroy_cq = c2_destroy_cq;
835 dev->ibdev.poll_cq = c2_poll_cq;
836 dev->ibdev.get_dma_mr = c2_get_dma_mr;
837 dev->ibdev.reg_phys_mr = c2_reg_phys_mr;
838 dev->ibdev.reg_user_mr = c2_reg_user_mr;
839 dev->ibdev.dereg_mr = c2_dereg_mr;
840
841 dev->ibdev.alloc_fmr = NULL;
842 dev->ibdev.unmap_fmr = NULL;
843 dev->ibdev.dealloc_fmr = NULL;
844 dev->ibdev.map_phys_fmr = NULL;
845
846 dev->ibdev.attach_mcast = c2_multicast_attach;
847 dev->ibdev.detach_mcast = c2_multicast_detach;
848 dev->ibdev.process_mad = c2_process_mad;
849
850 dev->ibdev.req_notify_cq = c2_arm_cq;
851 dev->ibdev.post_send = c2_post_send;
852 dev->ibdev.post_recv = c2_post_receive;
853
854 dev->ibdev.iwcm = kmalloc(sizeof(*dev->ibdev.iwcm), GFP_KERNEL);
855 if (dev->ibdev.iwcm == NULL) {
856 ret = -ENOMEM;
857 goto out_unregister_netdev;
858 }
859 dev->ibdev.iwcm->add_ref = c2_add_ref;
860 dev->ibdev.iwcm->rem_ref = c2_rem_ref;
861 dev->ibdev.iwcm->get_qp = c2_get_qp;
862 dev->ibdev.iwcm->connect = c2_connect;
863 dev->ibdev.iwcm->accept = c2_accept;
864 dev->ibdev.iwcm->reject = c2_reject;
865 dev->ibdev.iwcm->create_listen = c2_service_create;
866 dev->ibdev.iwcm->destroy_listen = c2_service_destroy;
867
868 ret = ib_register_device(&dev->ibdev, NULL);
869 if (ret)
870 goto out_free_iwcm;
871
872 for (i = 0; i < ARRAY_SIZE(c2_dev_attributes); ++i) {
873 ret = device_create_file(&dev->ibdev.dev,
874 c2_dev_attributes[i]);
875 if (ret)
876 goto out_unregister_ibdev;
877 }
878 goto out;
879
880 out_unregister_ibdev:
881 ib_unregister_device(&dev->ibdev);
882 out_free_iwcm:
883 kfree(dev->ibdev.iwcm);
884 out_unregister_netdev:
885 unregister_netdev(dev->pseudo_netdev);
886 out_free_netdev:
887 free_netdev(dev->pseudo_netdev);
888 out:
889 pr_debug("%s:%u ret=%d\n", __func__, __LINE__, ret);
890 return ret;
891 }
892
893 void c2_unregister_device(struct c2_dev *dev)
894 {
895 pr_debug("%s:%u\n", __func__, __LINE__);
896 unregister_netdev(dev->pseudo_netdev);
897 free_netdev(dev->pseudo_netdev);
898 ib_unregister_device(&dev->ibdev);
899 }