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
c2_query_device(struct ib_device * ibdev,struct ib_device_attr * props)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
c2_query_port(struct ib_device * ibdev,u8 port,struct ib_port_attr * props)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 = IB_SPEED_SDR;
98
99 return 0;
100 }
101
c2_query_pkey(struct ib_device * ibdev,u8 port,u16 index,u16 * pkey)102 static int c2_query_pkey(struct ib_device *ibdev,
103 u8 port, u16 index, u16 * pkey)
104 {
105 pr_debug("%s:%u\n", __func__, __LINE__);
106 *pkey = 0;
107 return 0;
108 }
109
c2_query_gid(struct ib_device * ibdev,u8 port,int index,union ib_gid * gid)110 static int c2_query_gid(struct ib_device *ibdev, u8 port,
111 int index, union ib_gid *gid)
112 {
113 struct c2_dev *c2dev = to_c2dev(ibdev);
114
115 pr_debug("%s:%u\n", __func__, __LINE__);
116 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
117 memcpy(&(gid->raw[0]), c2dev->pseudo_netdev->dev_addr, 6);
118
119 return 0;
120 }
121
122 /* Allocate the user context data structure. This keeps track
123 * of all objects associated with a particular user-mode client.
124 */
c2_alloc_ucontext(struct ib_device * ibdev,struct ib_udata * udata)125 static struct ib_ucontext *c2_alloc_ucontext(struct ib_device *ibdev,
126 struct ib_udata *udata)
127 {
128 struct c2_ucontext *context;
129
130 pr_debug("%s:%u\n", __func__, __LINE__);
131 context = kmalloc(sizeof(*context), GFP_KERNEL);
132 if (!context)
133 return ERR_PTR(-ENOMEM);
134
135 return &context->ibucontext;
136 }
137
c2_dealloc_ucontext(struct ib_ucontext * context)138 static int c2_dealloc_ucontext(struct ib_ucontext *context)
139 {
140 pr_debug("%s:%u\n", __func__, __LINE__);
141 kfree(context);
142 return 0;
143 }
144
c2_mmap_uar(struct ib_ucontext * context,struct vm_area_struct * vma)145 static int c2_mmap_uar(struct ib_ucontext *context, struct vm_area_struct *vma)
146 {
147 pr_debug("%s:%u\n", __func__, __LINE__);
148 return -ENOSYS;
149 }
150
c2_alloc_pd(struct ib_device * ibdev,struct ib_ucontext * context,struct ib_udata * udata)151 static struct ib_pd *c2_alloc_pd(struct ib_device *ibdev,
152 struct ib_ucontext *context,
153 struct ib_udata *udata)
154 {
155 struct c2_pd *pd;
156 int err;
157
158 pr_debug("%s:%u\n", __func__, __LINE__);
159
160 pd = kmalloc(sizeof(*pd), GFP_KERNEL);
161 if (!pd)
162 return ERR_PTR(-ENOMEM);
163
164 err = c2_pd_alloc(to_c2dev(ibdev), !context, pd);
165 if (err) {
166 kfree(pd);
167 return ERR_PTR(err);
168 }
169
170 if (context) {
171 if (ib_copy_to_udata(udata, &pd->pd_id, sizeof(__u32))) {
172 c2_pd_free(to_c2dev(ibdev), pd);
173 kfree(pd);
174 return ERR_PTR(-EFAULT);
175 }
176 }
177
178 return &pd->ibpd;
179 }
180
c2_dealloc_pd(struct ib_pd * pd)181 static int c2_dealloc_pd(struct ib_pd *pd)
182 {
183 pr_debug("%s:%u\n", __func__, __LINE__);
184 c2_pd_free(to_c2dev(pd->device), to_c2pd(pd));
185 kfree(pd);
186
187 return 0;
188 }
189
c2_ah_create(struct ib_pd * pd,struct ib_ah_attr * ah_attr)190 static struct ib_ah *c2_ah_create(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
191 {
192 pr_debug("%s:%u\n", __func__, __LINE__);
193 return ERR_PTR(-ENOSYS);
194 }
195
c2_ah_destroy(struct ib_ah * ah)196 static int c2_ah_destroy(struct ib_ah *ah)
197 {
198 pr_debug("%s:%u\n", __func__, __LINE__);
199 return -ENOSYS;
200 }
201
c2_add_ref(struct ib_qp * ibqp)202 static void c2_add_ref(struct ib_qp *ibqp)
203 {
204 struct c2_qp *qp;
205 BUG_ON(!ibqp);
206 qp = to_c2qp(ibqp);
207 atomic_inc(&qp->refcount);
208 }
209
c2_rem_ref(struct ib_qp * ibqp)210 static void c2_rem_ref(struct ib_qp *ibqp)
211 {
212 struct c2_qp *qp;
213 BUG_ON(!ibqp);
214 qp = to_c2qp(ibqp);
215 if (atomic_dec_and_test(&qp->refcount))
216 wake_up(&qp->wait);
217 }
218
c2_get_qp(struct ib_device * device,int qpn)219 struct ib_qp *c2_get_qp(struct ib_device *device, int qpn)
220 {
221 struct c2_dev* c2dev = to_c2dev(device);
222 struct c2_qp *qp;
223
224 qp = c2_find_qpn(c2dev, qpn);
225 pr_debug("%s Returning QP=%p for QPN=%d, device=%p, refcount=%d\n",
226 __func__, qp, qpn, device,
227 (qp?atomic_read(&qp->refcount):0));
228
229 return (qp?&qp->ibqp:NULL);
230 }
231
c2_create_qp(struct ib_pd * pd,struct ib_qp_init_attr * init_attr,struct ib_udata * udata)232 static struct ib_qp *c2_create_qp(struct ib_pd *pd,
233 struct ib_qp_init_attr *init_attr,
234 struct ib_udata *udata)
235 {
236 struct c2_qp *qp;
237 int err;
238
239 pr_debug("%s:%u\n", __func__, __LINE__);
240
241 if (init_attr->create_flags)
242 return ERR_PTR(-EINVAL);
243
244 switch (init_attr->qp_type) {
245 case IB_QPT_RC:
246 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
247 if (!qp) {
248 pr_debug("%s: Unable to allocate QP\n", __func__);
249 return ERR_PTR(-ENOMEM);
250 }
251 spin_lock_init(&qp->lock);
252 if (pd->uobject) {
253 /* userspace specific */
254 }
255
256 err = c2_alloc_qp(to_c2dev(pd->device),
257 to_c2pd(pd), init_attr, qp);
258
259 if (err && pd->uobject) {
260 /* userspace specific */
261 }
262
263 break;
264 default:
265 pr_debug("%s: Invalid QP type: %d\n", __func__,
266 init_attr->qp_type);
267 return ERR_PTR(-EINVAL);
268 }
269
270 if (err) {
271 kfree(qp);
272 return ERR_PTR(err);
273 }
274
275 return &qp->ibqp;
276 }
277
c2_destroy_qp(struct ib_qp * ib_qp)278 static int c2_destroy_qp(struct ib_qp *ib_qp)
279 {
280 struct c2_qp *qp = to_c2qp(ib_qp);
281
282 pr_debug("%s:%u qp=%p,qp->state=%d\n",
283 __func__, __LINE__, ib_qp, qp->state);
284 c2_free_qp(to_c2dev(ib_qp->device), qp);
285 kfree(qp);
286 return 0;
287 }
288
c2_create_cq(struct ib_device * ibdev,int entries,int vector,struct ib_ucontext * context,struct ib_udata * udata)289 static struct ib_cq *c2_create_cq(struct ib_device *ibdev, int entries, int vector,
290 struct ib_ucontext *context,
291 struct ib_udata *udata)
292 {
293 struct c2_cq *cq;
294 int err;
295
296 cq = kmalloc(sizeof(*cq), GFP_KERNEL);
297 if (!cq) {
298 pr_debug("%s: Unable to allocate CQ\n", __func__);
299 return ERR_PTR(-ENOMEM);
300 }
301
302 err = c2_init_cq(to_c2dev(ibdev), entries, NULL, cq);
303 if (err) {
304 pr_debug("%s: error initializing CQ\n", __func__);
305 kfree(cq);
306 return ERR_PTR(err);
307 }
308
309 return &cq->ibcq;
310 }
311
c2_destroy_cq(struct ib_cq * ib_cq)312 static int c2_destroy_cq(struct ib_cq *ib_cq)
313 {
314 struct c2_cq *cq = to_c2cq(ib_cq);
315
316 pr_debug("%s:%u\n", __func__, __LINE__);
317
318 c2_free_cq(to_c2dev(ib_cq->device), cq);
319 kfree(cq);
320
321 return 0;
322 }
323
c2_convert_access(int acc)324 static inline u32 c2_convert_access(int acc)
325 {
326 return (acc & IB_ACCESS_REMOTE_WRITE ? C2_ACF_REMOTE_WRITE : 0) |
327 (acc & IB_ACCESS_REMOTE_READ ? C2_ACF_REMOTE_READ : 0) |
328 (acc & IB_ACCESS_LOCAL_WRITE ? C2_ACF_LOCAL_WRITE : 0) |
329 C2_ACF_LOCAL_READ | C2_ACF_WINDOW_BIND;
330 }
331
c2_reg_phys_mr(struct ib_pd * ib_pd,struct ib_phys_buf * buffer_list,int num_phys_buf,int acc,u64 * iova_start)332 static struct ib_mr *c2_reg_phys_mr(struct ib_pd *ib_pd,
333 struct ib_phys_buf *buffer_list,
334 int num_phys_buf, int acc, u64 * iova_start)
335 {
336 struct c2_mr *mr;
337 u64 *page_list;
338 u32 total_len;
339 int err, i, j, k, page_shift, pbl_depth;
340
341 pbl_depth = 0;
342 total_len = 0;
343
344 page_shift = PAGE_SHIFT;
345 /*
346 * If there is only 1 buffer we assume this could
347 * be a map of all phy mem...use a 32k page_shift.
348 */
349 if (num_phys_buf == 1)
350 page_shift += 3;
351
352 for (i = 0; i < num_phys_buf; i++) {
353
354 if (buffer_list[i].addr & ~PAGE_MASK) {
355 pr_debug("Unaligned Memory Buffer: 0x%x\n",
356 (unsigned int) buffer_list[i].addr);
357 return ERR_PTR(-EINVAL);
358 }
359
360 if (!buffer_list[i].size) {
361 pr_debug("Invalid Buffer Size\n");
362 return ERR_PTR(-EINVAL);
363 }
364
365 total_len += buffer_list[i].size;
366 pbl_depth += ALIGN(buffer_list[i].size,
367 (1 << page_shift)) >> page_shift;
368 }
369
370 page_list = vmalloc(sizeof(u64) * pbl_depth);
371 if (!page_list) {
372 pr_debug("couldn't vmalloc page_list of size %zd\n",
373 (sizeof(u64) * pbl_depth));
374 return ERR_PTR(-ENOMEM);
375 }
376
377 for (i = 0, j = 0; i < num_phys_buf; i++) {
378
379 int naddrs;
380
381 naddrs = ALIGN(buffer_list[i].size,
382 (1 << page_shift)) >> page_shift;
383 for (k = 0; k < naddrs; k++)
384 page_list[j++] = (buffer_list[i].addr +
385 (k << page_shift));
386 }
387
388 mr = kmalloc(sizeof(*mr), GFP_KERNEL);
389 if (!mr) {
390 vfree(page_list);
391 return ERR_PTR(-ENOMEM);
392 }
393
394 mr->pd = to_c2pd(ib_pd);
395 mr->umem = NULL;
396 pr_debug("%s - page shift %d, pbl_depth %d, total_len %u, "
397 "*iova_start %llx, first pa %llx, last pa %llx\n",
398 __func__, page_shift, pbl_depth, total_len,
399 (unsigned long long) *iova_start,
400 (unsigned long long) page_list[0],
401 (unsigned long long) page_list[pbl_depth-1]);
402 err = c2_nsmr_register_phys_kern(to_c2dev(ib_pd->device), page_list,
403 (1 << page_shift), pbl_depth,
404 total_len, 0, iova_start,
405 c2_convert_access(acc), mr);
406 vfree(page_list);
407 if (err) {
408 kfree(mr);
409 return ERR_PTR(err);
410 }
411
412 return &mr->ibmr;
413 }
414
c2_get_dma_mr(struct ib_pd * pd,int acc)415 static struct ib_mr *c2_get_dma_mr(struct ib_pd *pd, int acc)
416 {
417 struct ib_phys_buf bl;
418 u64 kva = 0;
419
420 pr_debug("%s:%u\n", __func__, __LINE__);
421
422 /* AMSO1100 limit */
423 bl.size = 0xffffffff;
424 bl.addr = 0;
425 return c2_reg_phys_mr(pd, &bl, 1, acc, &kva);
426 }
427
c2_reg_user_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt,int acc,struct ib_udata * udata)428 static struct ib_mr *c2_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
429 u64 virt, int acc, struct ib_udata *udata)
430 {
431 u64 *pages;
432 u64 kva = 0;
433 int shift, n, len;
434 int i, k, entry;
435 int err = 0;
436 struct scatterlist *sg;
437 struct c2_pd *c2pd = to_c2pd(pd);
438 struct c2_mr *c2mr;
439
440 pr_debug("%s:%u\n", __func__, __LINE__);
441
442 c2mr = kmalloc(sizeof(*c2mr), GFP_KERNEL);
443 if (!c2mr)
444 return ERR_PTR(-ENOMEM);
445 c2mr->pd = c2pd;
446
447 c2mr->umem = ib_umem_get(pd->uobject->context, start, length, acc, 0);
448 if (IS_ERR(c2mr->umem)) {
449 err = PTR_ERR(c2mr->umem);
450 kfree(c2mr);
451 return ERR_PTR(err);
452 }
453
454 shift = ffs(c2mr->umem->page_size) - 1;
455 n = c2mr->umem->nmap;
456
457 pages = kmalloc(n * sizeof(u64), GFP_KERNEL);
458 if (!pages) {
459 err = -ENOMEM;
460 goto err;
461 }
462
463 i = 0;
464 for_each_sg(c2mr->umem->sg_head.sgl, sg, c2mr->umem->nmap, entry) {
465 len = sg_dma_len(sg) >> shift;
466 for (k = 0; k < len; ++k) {
467 pages[i++] =
468 sg_dma_address(sg) +
469 (c2mr->umem->page_size * k);
470 }
471 }
472
473 kva = virt;
474 err = c2_nsmr_register_phys_kern(to_c2dev(pd->device),
475 pages,
476 c2mr->umem->page_size,
477 i,
478 length,
479 c2mr->umem->offset,
480 &kva,
481 c2_convert_access(acc),
482 c2mr);
483 kfree(pages);
484 if (err)
485 goto err;
486 return &c2mr->ibmr;
487
488 err:
489 ib_umem_release(c2mr->umem);
490 kfree(c2mr);
491 return ERR_PTR(err);
492 }
493
c2_dereg_mr(struct ib_mr * ib_mr)494 static int c2_dereg_mr(struct ib_mr *ib_mr)
495 {
496 struct c2_mr *mr = to_c2mr(ib_mr);
497 int err;
498
499 pr_debug("%s:%u\n", __func__, __LINE__);
500
501 err = c2_stag_dealloc(to_c2dev(ib_mr->device), ib_mr->lkey);
502 if (err)
503 pr_debug("c2_stag_dealloc failed: %d\n", err);
504 else {
505 if (mr->umem)
506 ib_umem_release(mr->umem);
507 kfree(mr);
508 }
509
510 return err;
511 }
512
show_rev(struct device * dev,struct device_attribute * attr,char * buf)513 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
514 char *buf)
515 {
516 struct c2_dev *c2dev = container_of(dev, struct c2_dev, ibdev.dev);
517 pr_debug("%s:%u\n", __func__, __LINE__);
518 return sprintf(buf, "%x\n", c2dev->props.hw_ver);
519 }
520
show_fw_ver(struct device * dev,struct device_attribute * attr,char * buf)521 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
522 char *buf)
523 {
524 struct c2_dev *c2dev = container_of(dev, struct c2_dev, ibdev.dev);
525 pr_debug("%s:%u\n", __func__, __LINE__);
526 return sprintf(buf, "%x.%x.%x\n",
527 (int) (c2dev->props.fw_ver >> 32),
528 (int) (c2dev->props.fw_ver >> 16) & 0xffff,
529 (int) (c2dev->props.fw_ver & 0xffff));
530 }
531
show_hca(struct device * dev,struct device_attribute * attr,char * buf)532 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
533 char *buf)
534 {
535 pr_debug("%s:%u\n", __func__, __LINE__);
536 return sprintf(buf, "AMSO1100\n");
537 }
538
show_board(struct device * dev,struct device_attribute * attr,char * buf)539 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
540 char *buf)
541 {
542 pr_debug("%s:%u\n", __func__, __LINE__);
543 return sprintf(buf, "%.*s\n", 32, "AMSO1100 Board ID");
544 }
545
546 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
547 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
548 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
549 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
550
551 static struct device_attribute *c2_dev_attributes[] = {
552 &dev_attr_hw_rev,
553 &dev_attr_fw_ver,
554 &dev_attr_hca_type,
555 &dev_attr_board_id
556 };
557
c2_modify_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int attr_mask,struct ib_udata * udata)558 static int c2_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
559 int attr_mask, struct ib_udata *udata)
560 {
561 int err;
562
563 err =
564 c2_qp_modify(to_c2dev(ibqp->device), to_c2qp(ibqp), attr,
565 attr_mask);
566
567 return err;
568 }
569
c2_multicast_attach(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)570 static int c2_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
571 {
572 pr_debug("%s:%u\n", __func__, __LINE__);
573 return -ENOSYS;
574 }
575
c2_multicast_detach(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)576 static int c2_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
577 {
578 pr_debug("%s:%u\n", __func__, __LINE__);
579 return -ENOSYS;
580 }
581
c2_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)582 static int c2_process_mad(struct ib_device *ibdev,
583 int mad_flags,
584 u8 port_num,
585 struct ib_wc *in_wc,
586 struct ib_grh *in_grh,
587 struct ib_mad *in_mad, struct ib_mad *out_mad)
588 {
589 pr_debug("%s:%u\n", __func__, __LINE__);
590 return -ENOSYS;
591 }
592
c2_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * iw_param)593 static int c2_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
594 {
595 pr_debug("%s:%u\n", __func__, __LINE__);
596
597 /* Request a connection */
598 return c2_llp_connect(cm_id, iw_param);
599 }
600
c2_accept(struct iw_cm_id * cm_id,struct iw_cm_conn_param * iw_param)601 static int c2_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
602 {
603 pr_debug("%s:%u\n", __func__, __LINE__);
604
605 /* Accept the new connection */
606 return c2_llp_accept(cm_id, iw_param);
607 }
608
c2_reject(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)609 static int c2_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
610 {
611 int err;
612
613 pr_debug("%s:%u\n", __func__, __LINE__);
614
615 err = c2_llp_reject(cm_id, pdata, pdata_len);
616 return err;
617 }
618
c2_service_create(struct iw_cm_id * cm_id,int backlog)619 static int c2_service_create(struct iw_cm_id *cm_id, int backlog)
620 {
621 int err;
622
623 pr_debug("%s:%u\n", __func__, __LINE__);
624 err = c2_llp_service_create(cm_id, backlog);
625 pr_debug("%s:%u err=%d\n",
626 __func__, __LINE__,
627 err);
628 return err;
629 }
630
c2_service_destroy(struct iw_cm_id * cm_id)631 static int c2_service_destroy(struct iw_cm_id *cm_id)
632 {
633 int err;
634 pr_debug("%s:%u\n", __func__, __LINE__);
635
636 err = c2_llp_service_destroy(cm_id);
637
638 return err;
639 }
640
c2_pseudo_up(struct net_device * netdev)641 static int c2_pseudo_up(struct net_device *netdev)
642 {
643 struct in_device *ind;
644 struct c2_dev *c2dev = netdev->ml_priv;
645
646 ind = in_dev_get(netdev);
647 if (!ind)
648 return 0;
649
650 pr_debug("adding...\n");
651 for_ifa(ind) {
652 #ifdef DEBUG
653 u8 *ip = (u8 *) & ifa->ifa_address;
654
655 pr_debug("%s: %d.%d.%d.%d\n",
656 ifa->ifa_label, ip[0], ip[1], ip[2], ip[3]);
657 #endif
658 c2_add_addr(c2dev, ifa->ifa_address, ifa->ifa_mask);
659 }
660 endfor_ifa(ind);
661 in_dev_put(ind);
662
663 return 0;
664 }
665
c2_pseudo_down(struct net_device * netdev)666 static int c2_pseudo_down(struct net_device *netdev)
667 {
668 struct in_device *ind;
669 struct c2_dev *c2dev = netdev->ml_priv;
670
671 ind = in_dev_get(netdev);
672 if (!ind)
673 return 0;
674
675 pr_debug("deleting...\n");
676 for_ifa(ind) {
677 #ifdef DEBUG
678 u8 *ip = (u8 *) & ifa->ifa_address;
679
680 pr_debug("%s: %d.%d.%d.%d\n",
681 ifa->ifa_label, ip[0], ip[1], ip[2], ip[3]);
682 #endif
683 c2_del_addr(c2dev, ifa->ifa_address, ifa->ifa_mask);
684 }
685 endfor_ifa(ind);
686 in_dev_put(ind);
687
688 return 0;
689 }
690
c2_pseudo_xmit_frame(struct sk_buff * skb,struct net_device * netdev)691 static int c2_pseudo_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
692 {
693 kfree_skb(skb);
694 return NETDEV_TX_OK;
695 }
696
c2_pseudo_change_mtu(struct net_device * netdev,int new_mtu)697 static int c2_pseudo_change_mtu(struct net_device *netdev, int new_mtu)
698 {
699 if (new_mtu < ETH_ZLEN || new_mtu > ETH_JUMBO_MTU)
700 return -EINVAL;
701
702 netdev->mtu = new_mtu;
703
704 /* TODO: Tell rnic about new rmda interface mtu */
705 return 0;
706 }
707
708 static const struct net_device_ops c2_pseudo_netdev_ops = {
709 .ndo_open = c2_pseudo_up,
710 .ndo_stop = c2_pseudo_down,
711 .ndo_start_xmit = c2_pseudo_xmit_frame,
712 .ndo_change_mtu = c2_pseudo_change_mtu,
713 .ndo_validate_addr = eth_validate_addr,
714 };
715
setup(struct net_device * netdev)716 static void setup(struct net_device *netdev)
717 {
718 netdev->netdev_ops = &c2_pseudo_netdev_ops;
719
720 netdev->watchdog_timeo = 0;
721 netdev->type = ARPHRD_ETHER;
722 netdev->mtu = 1500;
723 netdev->hard_header_len = ETH_HLEN;
724 netdev->addr_len = ETH_ALEN;
725 netdev->tx_queue_len = 0;
726 netdev->flags |= IFF_NOARP;
727 }
728
c2_pseudo_netdev_init(struct c2_dev * c2dev)729 static struct net_device *c2_pseudo_netdev_init(struct c2_dev *c2dev)
730 {
731 char name[IFNAMSIZ];
732 struct net_device *netdev;
733
734 /* change ethxxx to iwxxx */
735 strcpy(name, "iw");
736 strcat(name, &c2dev->netdev->name[3]);
737 netdev = alloc_netdev(0, name, NET_NAME_UNKNOWN, setup);
738 if (!netdev) {
739 printk(KERN_ERR PFX "%s - etherdev alloc failed",
740 __func__);
741 return NULL;
742 }
743
744 netdev->ml_priv = c2dev;
745
746 SET_NETDEV_DEV(netdev, &c2dev->pcidev->dev);
747
748 memcpy_fromio(netdev->dev_addr, c2dev->kva + C2_REGS_RDMA_ENADDR, 6);
749
750 /* Print out the MAC address */
751 pr_debug("%s: MAC %pM\n", netdev->name, netdev->dev_addr);
752
753 #if 0
754 /* Disable network packets */
755 netif_stop_queue(netdev);
756 #endif
757 return netdev;
758 }
759
c2_register_device(struct c2_dev * dev)760 int c2_register_device(struct c2_dev *dev)
761 {
762 int ret = -ENOMEM;
763 int i;
764
765 /* Register pseudo network device */
766 dev->pseudo_netdev = c2_pseudo_netdev_init(dev);
767 if (!dev->pseudo_netdev)
768 goto out;
769
770 ret = register_netdev(dev->pseudo_netdev);
771 if (ret)
772 goto out_free_netdev;
773
774 pr_debug("%s:%u\n", __func__, __LINE__);
775 strlcpy(dev->ibdev.name, "amso%d", IB_DEVICE_NAME_MAX);
776 dev->ibdev.owner = THIS_MODULE;
777 dev->ibdev.uverbs_cmd_mask =
778 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
779 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
780 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
781 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
782 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
783 (1ull << IB_USER_VERBS_CMD_REG_MR) |
784 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
785 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
786 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
787 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
788 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
789 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
790 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
791 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
792 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
793 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
794 (1ull << IB_USER_VERBS_CMD_POST_RECV);
795
796 dev->ibdev.node_type = RDMA_NODE_RNIC;
797 memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
798 memcpy(&dev->ibdev.node_guid, dev->pseudo_netdev->dev_addr, 6);
799 dev->ibdev.phys_port_cnt = 1;
800 dev->ibdev.num_comp_vectors = 1;
801 dev->ibdev.dma_device = &dev->pcidev->dev;
802 dev->ibdev.query_device = c2_query_device;
803 dev->ibdev.query_port = c2_query_port;
804 dev->ibdev.query_pkey = c2_query_pkey;
805 dev->ibdev.query_gid = c2_query_gid;
806 dev->ibdev.alloc_ucontext = c2_alloc_ucontext;
807 dev->ibdev.dealloc_ucontext = c2_dealloc_ucontext;
808 dev->ibdev.mmap = c2_mmap_uar;
809 dev->ibdev.alloc_pd = c2_alloc_pd;
810 dev->ibdev.dealloc_pd = c2_dealloc_pd;
811 dev->ibdev.create_ah = c2_ah_create;
812 dev->ibdev.destroy_ah = c2_ah_destroy;
813 dev->ibdev.create_qp = c2_create_qp;
814 dev->ibdev.modify_qp = c2_modify_qp;
815 dev->ibdev.destroy_qp = c2_destroy_qp;
816 dev->ibdev.create_cq = c2_create_cq;
817 dev->ibdev.destroy_cq = c2_destroy_cq;
818 dev->ibdev.poll_cq = c2_poll_cq;
819 dev->ibdev.get_dma_mr = c2_get_dma_mr;
820 dev->ibdev.reg_phys_mr = c2_reg_phys_mr;
821 dev->ibdev.reg_user_mr = c2_reg_user_mr;
822 dev->ibdev.dereg_mr = c2_dereg_mr;
823
824 dev->ibdev.alloc_fmr = NULL;
825 dev->ibdev.unmap_fmr = NULL;
826 dev->ibdev.dealloc_fmr = NULL;
827 dev->ibdev.map_phys_fmr = NULL;
828
829 dev->ibdev.attach_mcast = c2_multicast_attach;
830 dev->ibdev.detach_mcast = c2_multicast_detach;
831 dev->ibdev.process_mad = c2_process_mad;
832
833 dev->ibdev.req_notify_cq = c2_arm_cq;
834 dev->ibdev.post_send = c2_post_send;
835 dev->ibdev.post_recv = c2_post_receive;
836
837 dev->ibdev.iwcm = kmalloc(sizeof(*dev->ibdev.iwcm), GFP_KERNEL);
838 if (dev->ibdev.iwcm == NULL) {
839 ret = -ENOMEM;
840 goto out_unregister_netdev;
841 }
842 dev->ibdev.iwcm->add_ref = c2_add_ref;
843 dev->ibdev.iwcm->rem_ref = c2_rem_ref;
844 dev->ibdev.iwcm->get_qp = c2_get_qp;
845 dev->ibdev.iwcm->connect = c2_connect;
846 dev->ibdev.iwcm->accept = c2_accept;
847 dev->ibdev.iwcm->reject = c2_reject;
848 dev->ibdev.iwcm->create_listen = c2_service_create;
849 dev->ibdev.iwcm->destroy_listen = c2_service_destroy;
850
851 ret = ib_register_device(&dev->ibdev, NULL);
852 if (ret)
853 goto out_free_iwcm;
854
855 for (i = 0; i < ARRAY_SIZE(c2_dev_attributes); ++i) {
856 ret = device_create_file(&dev->ibdev.dev,
857 c2_dev_attributes[i]);
858 if (ret)
859 goto out_unregister_ibdev;
860 }
861 goto out;
862
863 out_unregister_ibdev:
864 ib_unregister_device(&dev->ibdev);
865 out_free_iwcm:
866 kfree(dev->ibdev.iwcm);
867 out_unregister_netdev:
868 unregister_netdev(dev->pseudo_netdev);
869 out_free_netdev:
870 free_netdev(dev->pseudo_netdev);
871 out:
872 pr_debug("%s:%u ret=%d\n", __func__, __LINE__, ret);
873 return ret;
874 }
875
c2_unregister_device(struct c2_dev * dev)876 void c2_unregister_device(struct c2_dev *dev)
877 {
878 pr_debug("%s:%u\n", __func__, __LINE__);
879 unregister_netdev(dev->pseudo_netdev);
880 free_netdev(dev->pseudo_netdev);
881 ib_unregister_device(&dev->ibdev);
882 }
883