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[deliverable/linux.git] / drivers / infiniband / hw / mthca / mthca_provider.c
1 /*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2005 Cisco Systems. All rights reserved.
5 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
6 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
7 *
8 * This software is available to you under a choice of one of two
9 * licenses. You may choose to be licensed under the terms of the GNU
10 * General Public License (GPL) Version 2, available from the file
11 * COPYING in the main directory of this source tree, or the
12 * OpenIB.org BSD license below:
13 *
14 * Redistribution and use in source and binary forms, with or
15 * without modification, are permitted provided that the following
16 * conditions are met:
17 *
18 * - Redistributions of source code must retain the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer.
21 *
22 * - Redistributions in binary form must reproduce the above
23 * copyright notice, this list of conditions and the following
24 * disclaimer in the documentation and/or other materials
25 * provided with the distribution.
26 *
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 * SOFTWARE.
35 *
36 * $Id: mthca_provider.c 1397 2004-12-28 05:09:00Z roland $
37 */
38
39 #include <rdma/ib_smi.h>
40 #include <linux/mm.h>
41
42 #include "mthca_dev.h"
43 #include "mthca_cmd.h"
44 #include "mthca_user.h"
45 #include "mthca_memfree.h"
46
47 static int mthca_query_device(struct ib_device *ibdev,
48 struct ib_device_attr *props)
49 {
50 struct ib_smp *in_mad = NULL;
51 struct ib_smp *out_mad = NULL;
52 int err = -ENOMEM;
53 struct mthca_dev* mdev = to_mdev(ibdev);
54
55 u8 status;
56
57 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
58 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
59 if (!in_mad || !out_mad)
60 goto out;
61
62 memset(props, 0, sizeof *props);
63
64 props->fw_ver = mdev->fw_ver;
65
66 memset(in_mad, 0, sizeof *in_mad);
67 in_mad->base_version = 1;
68 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
69 in_mad->class_version = 1;
70 in_mad->method = IB_MGMT_METHOD_GET;
71 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
72
73 err = mthca_MAD_IFC(mdev, 1, 1,
74 1, NULL, NULL, in_mad, out_mad,
75 &status);
76 if (err)
77 goto out;
78 if (status) {
79 err = -EINVAL;
80 goto out;
81 }
82
83 props->device_cap_flags = mdev->device_cap_flags;
84 props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
85 0xffffff;
86 props->vendor_part_id = be16_to_cpup((__be16 *) (out_mad->data + 30));
87 props->hw_ver = be16_to_cpup((__be16 *) (out_mad->data + 32));
88 memcpy(&props->sys_image_guid, out_mad->data + 4, 8);
89 memcpy(&props->node_guid, out_mad->data + 12, 8);
90
91 props->max_mr_size = ~0ull;
92 props->max_qp = mdev->limits.num_qps - mdev->limits.reserved_qps;
93 props->max_qp_wr = 0xffff;
94 props->max_sge = mdev->limits.max_sg;
95 props->max_cq = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
96 props->max_cqe = 0xffff;
97 props->max_mr = mdev->limits.num_mpts - mdev->limits.reserved_mrws;
98 props->max_pd = mdev->limits.num_pds - mdev->limits.reserved_pds;
99 props->max_qp_rd_atom = 1 << mdev->qp_table.rdb_shift;
100 props->max_qp_init_rd_atom = 1 << mdev->qp_table.rdb_shift;
101 props->local_ca_ack_delay = mdev->limits.local_ca_ack_delay;
102
103 err = 0;
104 out:
105 kfree(in_mad);
106 kfree(out_mad);
107 return err;
108 }
109
110 static int mthca_query_port(struct ib_device *ibdev,
111 u8 port, struct ib_port_attr *props)
112 {
113 struct ib_smp *in_mad = NULL;
114 struct ib_smp *out_mad = NULL;
115 int err = -ENOMEM;
116 u8 status;
117
118 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
119 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
120 if (!in_mad || !out_mad)
121 goto out;
122
123 memset(props, 0, sizeof *props);
124
125 memset(in_mad, 0, sizeof *in_mad);
126 in_mad->base_version = 1;
127 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
128 in_mad->class_version = 1;
129 in_mad->method = IB_MGMT_METHOD_GET;
130 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
131 in_mad->attr_mod = cpu_to_be32(port);
132
133 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
134 port, NULL, NULL, in_mad, out_mad,
135 &status);
136 if (err)
137 goto out;
138 if (status) {
139 err = -EINVAL;
140 goto out;
141 }
142
143 props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16));
144 props->lmc = out_mad->data[34] & 0x7;
145 props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18));
146 props->sm_sl = out_mad->data[36] & 0xf;
147 props->state = out_mad->data[32] & 0xf;
148 props->phys_state = out_mad->data[33] >> 4;
149 props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20));
150 props->gid_tbl_len = to_mdev(ibdev)->limits.gid_table_len;
151 props->max_msg_sz = 0x80000000;
152 props->pkey_tbl_len = to_mdev(ibdev)->limits.pkey_table_len;
153 props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48));
154 props->active_width = out_mad->data[31] & 0xf;
155 props->active_speed = out_mad->data[35] >> 4;
156
157 out:
158 kfree(in_mad);
159 kfree(out_mad);
160 return err;
161 }
162
163 static int mthca_modify_port(struct ib_device *ibdev,
164 u8 port, int port_modify_mask,
165 struct ib_port_modify *props)
166 {
167 struct mthca_set_ib_param set_ib;
168 struct ib_port_attr attr;
169 int err;
170 u8 status;
171
172 if (down_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
173 return -ERESTARTSYS;
174
175 err = mthca_query_port(ibdev, port, &attr);
176 if (err)
177 goto out;
178
179 set_ib.set_si_guid = 0;
180 set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
181
182 set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
183 ~props->clr_port_cap_mask;
184
185 err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port, &status);
186 if (err)
187 goto out;
188 if (status) {
189 err = -EINVAL;
190 goto out;
191 }
192
193 out:
194 up(&to_mdev(ibdev)->cap_mask_mutex);
195 return err;
196 }
197
198 static int mthca_query_pkey(struct ib_device *ibdev,
199 u8 port, u16 index, u16 *pkey)
200 {
201 struct ib_smp *in_mad = NULL;
202 struct ib_smp *out_mad = NULL;
203 int err = -ENOMEM;
204 u8 status;
205
206 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
207 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
208 if (!in_mad || !out_mad)
209 goto out;
210
211 memset(in_mad, 0, sizeof *in_mad);
212 in_mad->base_version = 1;
213 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
214 in_mad->class_version = 1;
215 in_mad->method = IB_MGMT_METHOD_GET;
216 in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE;
217 in_mad->attr_mod = cpu_to_be32(index / 32);
218
219 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
220 port, NULL, NULL, in_mad, out_mad,
221 &status);
222 if (err)
223 goto out;
224 if (status) {
225 err = -EINVAL;
226 goto out;
227 }
228
229 *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
230
231 out:
232 kfree(in_mad);
233 kfree(out_mad);
234 return err;
235 }
236
237 static int mthca_query_gid(struct ib_device *ibdev, u8 port,
238 int index, union ib_gid *gid)
239 {
240 struct ib_smp *in_mad = NULL;
241 struct ib_smp *out_mad = NULL;
242 int err = -ENOMEM;
243 u8 status;
244
245 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
246 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
247 if (!in_mad || !out_mad)
248 goto out;
249
250 memset(in_mad, 0, sizeof *in_mad);
251 in_mad->base_version = 1;
252 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
253 in_mad->class_version = 1;
254 in_mad->method = IB_MGMT_METHOD_GET;
255 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
256 in_mad->attr_mod = cpu_to_be32(port);
257
258 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
259 port, NULL, NULL, in_mad, out_mad,
260 &status);
261 if (err)
262 goto out;
263 if (status) {
264 err = -EINVAL;
265 goto out;
266 }
267
268 memcpy(gid->raw, out_mad->data + 8, 8);
269
270 memset(in_mad, 0, sizeof *in_mad);
271 in_mad->base_version = 1;
272 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
273 in_mad->class_version = 1;
274 in_mad->method = IB_MGMT_METHOD_GET;
275 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
276 in_mad->attr_mod = cpu_to_be32(index / 8);
277
278 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
279 port, NULL, NULL, in_mad, out_mad,
280 &status);
281 if (err)
282 goto out;
283 if (status) {
284 err = -EINVAL;
285 goto out;
286 }
287
288 memcpy(gid->raw + 8, out_mad->data + (index % 8) * 16, 8);
289
290 out:
291 kfree(in_mad);
292 kfree(out_mad);
293 return err;
294 }
295
296 static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,
297 struct ib_udata *udata)
298 {
299 struct mthca_alloc_ucontext_resp uresp;
300 struct mthca_ucontext *context;
301 int err;
302
303 memset(&uresp, 0, sizeof uresp);
304
305 uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
306 if (mthca_is_memfree(to_mdev(ibdev)))
307 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
308 else
309 uresp.uarc_size = 0;
310
311 context = kmalloc(sizeof *context, GFP_KERNEL);
312 if (!context)
313 return ERR_PTR(-ENOMEM);
314
315 err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
316 if (err) {
317 kfree(context);
318 return ERR_PTR(err);
319 }
320
321 context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
322 if (IS_ERR(context->db_tab)) {
323 err = PTR_ERR(context->db_tab);
324 mthca_uar_free(to_mdev(ibdev), &context->uar);
325 kfree(context);
326 return ERR_PTR(err);
327 }
328
329 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
330 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
331 mthca_uar_free(to_mdev(ibdev), &context->uar);
332 kfree(context);
333 return ERR_PTR(-EFAULT);
334 }
335
336 return &context->ibucontext;
337 }
338
339 static int mthca_dealloc_ucontext(struct ib_ucontext *context)
340 {
341 mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
342 to_mucontext(context)->db_tab);
343 mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
344 kfree(to_mucontext(context));
345
346 return 0;
347 }
348
349 static int mthca_mmap_uar(struct ib_ucontext *context,
350 struct vm_area_struct *vma)
351 {
352 if (vma->vm_end - vma->vm_start != PAGE_SIZE)
353 return -EINVAL;
354
355 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
356
357 if (io_remap_pfn_range(vma, vma->vm_start,
358 to_mucontext(context)->uar.pfn,
359 PAGE_SIZE, vma->vm_page_prot))
360 return -EAGAIN;
361
362 return 0;
363 }
364
365 static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
366 struct ib_ucontext *context,
367 struct ib_udata *udata)
368 {
369 struct mthca_pd *pd;
370 int err;
371
372 pd = kmalloc(sizeof *pd, GFP_KERNEL);
373 if (!pd)
374 return ERR_PTR(-ENOMEM);
375
376 err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
377 if (err) {
378 kfree(pd);
379 return ERR_PTR(err);
380 }
381
382 if (context) {
383 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
384 mthca_pd_free(to_mdev(ibdev), pd);
385 kfree(pd);
386 return ERR_PTR(-EFAULT);
387 }
388 }
389
390 return &pd->ibpd;
391 }
392
393 static int mthca_dealloc_pd(struct ib_pd *pd)
394 {
395 mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
396 kfree(pd);
397
398 return 0;
399 }
400
401 static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
402 struct ib_ah_attr *ah_attr)
403 {
404 int err;
405 struct mthca_ah *ah;
406
407 ah = kmalloc(sizeof *ah, GFP_ATOMIC);
408 if (!ah)
409 return ERR_PTR(-ENOMEM);
410
411 err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
412 if (err) {
413 kfree(ah);
414 return ERR_PTR(err);
415 }
416
417 return &ah->ibah;
418 }
419
420 static int mthca_ah_destroy(struct ib_ah *ah)
421 {
422 mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
423 kfree(ah);
424
425 return 0;
426 }
427
428 static struct ib_srq *mthca_create_srq(struct ib_pd *pd,
429 struct ib_srq_init_attr *init_attr,
430 struct ib_udata *udata)
431 {
432 struct mthca_create_srq ucmd;
433 struct mthca_ucontext *context = NULL;
434 struct mthca_srq *srq;
435 int err;
436
437 srq = kmalloc(sizeof *srq, GFP_KERNEL);
438 if (!srq)
439 return ERR_PTR(-ENOMEM);
440
441 if (pd->uobject) {
442 context = to_mucontext(pd->uobject->context);
443
444 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
445 return ERR_PTR(-EFAULT);
446
447 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
448 context->db_tab, ucmd.db_index,
449 ucmd.db_page);
450
451 if (err)
452 goto err_free;
453
454 srq->mr.ibmr.lkey = ucmd.lkey;
455 srq->db_index = ucmd.db_index;
456 }
457
458 err = mthca_alloc_srq(to_mdev(pd->device), to_mpd(pd),
459 &init_attr->attr, srq);
460
461 if (err && pd->uobject)
462 mthca_unmap_user_db(to_mdev(pd->device), &context->uar,
463 context->db_tab, ucmd.db_index);
464
465 if (err)
466 goto err_free;
467
468 if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof (__u32))) {
469 mthca_free_srq(to_mdev(pd->device), srq);
470 err = -EFAULT;
471 goto err_free;
472 }
473
474 return &srq->ibsrq;
475
476 err_free:
477 kfree(srq);
478
479 return ERR_PTR(err);
480 }
481
482 static int mthca_destroy_srq(struct ib_srq *srq)
483 {
484 struct mthca_ucontext *context;
485
486 if (srq->uobject) {
487 context = to_mucontext(srq->uobject->context);
488
489 mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
490 context->db_tab, to_msrq(srq)->db_index);
491 }
492
493 mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
494 kfree(srq);
495
496 return 0;
497 }
498
499 static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
500 struct ib_qp_init_attr *init_attr,
501 struct ib_udata *udata)
502 {
503 struct mthca_create_qp ucmd;
504 struct mthca_qp *qp;
505 int err;
506
507 switch (init_attr->qp_type) {
508 case IB_QPT_RC:
509 case IB_QPT_UC:
510 case IB_QPT_UD:
511 {
512 struct mthca_ucontext *context;
513
514 qp = kmalloc(sizeof *qp, GFP_KERNEL);
515 if (!qp)
516 return ERR_PTR(-ENOMEM);
517
518 if (pd->uobject) {
519 context = to_mucontext(pd->uobject->context);
520
521 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
522 return ERR_PTR(-EFAULT);
523
524 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
525 context->db_tab,
526 ucmd.sq_db_index, ucmd.sq_db_page);
527 if (err) {
528 kfree(qp);
529 return ERR_PTR(err);
530 }
531
532 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
533 context->db_tab,
534 ucmd.rq_db_index, ucmd.rq_db_page);
535 if (err) {
536 mthca_unmap_user_db(to_mdev(pd->device),
537 &context->uar,
538 context->db_tab,
539 ucmd.sq_db_index);
540 kfree(qp);
541 return ERR_PTR(err);
542 }
543
544 qp->mr.ibmr.lkey = ucmd.lkey;
545 qp->sq.db_index = ucmd.sq_db_index;
546 qp->rq.db_index = ucmd.rq_db_index;
547 }
548
549 err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
550 to_mcq(init_attr->send_cq),
551 to_mcq(init_attr->recv_cq),
552 init_attr->qp_type, init_attr->sq_sig_type,
553 &init_attr->cap, qp);
554
555 if (err && pd->uobject) {
556 context = to_mucontext(pd->uobject->context);
557
558 mthca_unmap_user_db(to_mdev(pd->device),
559 &context->uar,
560 context->db_tab,
561 ucmd.sq_db_index);
562 mthca_unmap_user_db(to_mdev(pd->device),
563 &context->uar,
564 context->db_tab,
565 ucmd.rq_db_index);
566 }
567
568 qp->ibqp.qp_num = qp->qpn;
569 break;
570 }
571 case IB_QPT_SMI:
572 case IB_QPT_GSI:
573 {
574 /* Don't allow userspace to create special QPs */
575 if (pd->uobject)
576 return ERR_PTR(-EINVAL);
577
578 qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
579 if (!qp)
580 return ERR_PTR(-ENOMEM);
581
582 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
583
584 err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
585 to_mcq(init_attr->send_cq),
586 to_mcq(init_attr->recv_cq),
587 init_attr->sq_sig_type, &init_attr->cap,
588 qp->ibqp.qp_num, init_attr->port_num,
589 to_msqp(qp));
590 break;
591 }
592 default:
593 /* Don't support raw QPs */
594 return ERR_PTR(-ENOSYS);
595 }
596
597 if (err) {
598 kfree(qp);
599 return ERR_PTR(err);
600 }
601
602 init_attr->cap.max_inline_data = 0;
603 init_attr->cap.max_send_wr = qp->sq.max;
604 init_attr->cap.max_recv_wr = qp->rq.max;
605 init_attr->cap.max_send_sge = qp->sq.max_gs;
606 init_attr->cap.max_recv_sge = qp->rq.max_gs;
607
608 return &qp->ibqp;
609 }
610
611 static int mthca_destroy_qp(struct ib_qp *qp)
612 {
613 if (qp->uobject) {
614 mthca_unmap_user_db(to_mdev(qp->device),
615 &to_mucontext(qp->uobject->context)->uar,
616 to_mucontext(qp->uobject->context)->db_tab,
617 to_mqp(qp)->sq.db_index);
618 mthca_unmap_user_db(to_mdev(qp->device),
619 &to_mucontext(qp->uobject->context)->uar,
620 to_mucontext(qp->uobject->context)->db_tab,
621 to_mqp(qp)->rq.db_index);
622 }
623 mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
624 kfree(qp);
625 return 0;
626 }
627
628 static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
629 struct ib_ucontext *context,
630 struct ib_udata *udata)
631 {
632 struct mthca_create_cq ucmd;
633 struct mthca_cq *cq;
634 int nent;
635 int err;
636
637 if (context) {
638 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
639 return ERR_PTR(-EFAULT);
640
641 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
642 to_mucontext(context)->db_tab,
643 ucmd.set_db_index, ucmd.set_db_page);
644 if (err)
645 return ERR_PTR(err);
646
647 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
648 to_mucontext(context)->db_tab,
649 ucmd.arm_db_index, ucmd.arm_db_page);
650 if (err)
651 goto err_unmap_set;
652 }
653
654 cq = kmalloc(sizeof *cq, GFP_KERNEL);
655 if (!cq) {
656 err = -ENOMEM;
657 goto err_unmap_arm;
658 }
659
660 if (context) {
661 cq->mr.ibmr.lkey = ucmd.lkey;
662 cq->set_ci_db_index = ucmd.set_db_index;
663 cq->arm_db_index = ucmd.arm_db_index;
664 }
665
666 for (nent = 1; nent <= entries; nent <<= 1)
667 ; /* nothing */
668
669 err = mthca_init_cq(to_mdev(ibdev), nent,
670 context ? to_mucontext(context) : NULL,
671 context ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
672 cq);
673 if (err)
674 goto err_free;
675
676 if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) {
677 mthca_free_cq(to_mdev(ibdev), cq);
678 goto err_free;
679 }
680
681 return &cq->ibcq;
682
683 err_free:
684 kfree(cq);
685
686 err_unmap_arm:
687 if (context)
688 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
689 to_mucontext(context)->db_tab, ucmd.arm_db_index);
690
691 err_unmap_set:
692 if (context)
693 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
694 to_mucontext(context)->db_tab, ucmd.set_db_index);
695
696 return ERR_PTR(err);
697 }
698
699 static int mthca_destroy_cq(struct ib_cq *cq)
700 {
701 if (cq->uobject) {
702 mthca_unmap_user_db(to_mdev(cq->device),
703 &to_mucontext(cq->uobject->context)->uar,
704 to_mucontext(cq->uobject->context)->db_tab,
705 to_mcq(cq)->arm_db_index);
706 mthca_unmap_user_db(to_mdev(cq->device),
707 &to_mucontext(cq->uobject->context)->uar,
708 to_mucontext(cq->uobject->context)->db_tab,
709 to_mcq(cq)->set_ci_db_index);
710 }
711 mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
712 kfree(cq);
713
714 return 0;
715 }
716
717 static inline u32 convert_access(int acc)
718 {
719 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) |
720 (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
721 (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) |
722 (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) |
723 MTHCA_MPT_FLAG_LOCAL_READ;
724 }
725
726 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
727 {
728 struct mthca_mr *mr;
729 int err;
730
731 mr = kmalloc(sizeof *mr, GFP_KERNEL);
732 if (!mr)
733 return ERR_PTR(-ENOMEM);
734
735 err = mthca_mr_alloc_notrans(to_mdev(pd->device),
736 to_mpd(pd)->pd_num,
737 convert_access(acc), mr);
738
739 if (err) {
740 kfree(mr);
741 return ERR_PTR(err);
742 }
743
744 return &mr->ibmr;
745 }
746
747 static struct ib_mr *mthca_reg_phys_mr(struct ib_pd *pd,
748 struct ib_phys_buf *buffer_list,
749 int num_phys_buf,
750 int acc,
751 u64 *iova_start)
752 {
753 struct mthca_mr *mr;
754 u64 *page_list;
755 u64 total_size;
756 u64 mask;
757 int shift;
758 int npages;
759 int err;
760 int i, j, n;
761
762 /* First check that we have enough alignment */
763 if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK))
764 return ERR_PTR(-EINVAL);
765
766 if (num_phys_buf > 1 &&
767 ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK))
768 return ERR_PTR(-EINVAL);
769
770 mask = 0;
771 total_size = 0;
772 for (i = 0; i < num_phys_buf; ++i) {
773 if (i != 0 && buffer_list[i].addr & ~PAGE_MASK)
774 return ERR_PTR(-EINVAL);
775 if (i != 0 && i != num_phys_buf - 1 &&
776 (buffer_list[i].size & ~PAGE_MASK))
777 return ERR_PTR(-EINVAL);
778
779 total_size += buffer_list[i].size;
780 if (i > 0)
781 mask |= buffer_list[i].addr;
782 }
783
784 /* Find largest page shift we can use to cover buffers */
785 for (shift = PAGE_SHIFT; shift < 31; ++shift)
786 if (num_phys_buf > 1) {
787 if ((1ULL << shift) & mask)
788 break;
789 } else {
790 if (1ULL << shift >=
791 buffer_list[0].size +
792 (buffer_list[0].addr & ((1ULL << shift) - 1)))
793 break;
794 }
795
796 buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
797 buffer_list[0].addr &= ~0ull << shift;
798
799 mr = kmalloc(sizeof *mr, GFP_KERNEL);
800 if (!mr)
801 return ERR_PTR(-ENOMEM);
802
803 npages = 0;
804 for (i = 0; i < num_phys_buf; ++i)
805 npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
806
807 if (!npages)
808 return &mr->ibmr;
809
810 page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
811 if (!page_list) {
812 kfree(mr);
813 return ERR_PTR(-ENOMEM);
814 }
815
816 n = 0;
817 for (i = 0; i < num_phys_buf; ++i)
818 for (j = 0;
819 j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
820 ++j)
821 page_list[n++] = buffer_list[i].addr + ((u64) j << shift);
822
823 mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
824 "in PD %x; shift %d, npages %d.\n",
825 (unsigned long long) buffer_list[0].addr,
826 (unsigned long long) *iova_start,
827 to_mpd(pd)->pd_num,
828 shift, npages);
829
830 err = mthca_mr_alloc_phys(to_mdev(pd->device),
831 to_mpd(pd)->pd_num,
832 page_list, shift, npages,
833 *iova_start, total_size,
834 convert_access(acc), mr);
835
836 if (err) {
837 kfree(page_list);
838 kfree(mr);
839 return ERR_PTR(err);
840 }
841
842 kfree(page_list);
843 return &mr->ibmr;
844 }
845
846 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
847 int acc, struct ib_udata *udata)
848 {
849 struct mthca_dev *dev = to_mdev(pd->device);
850 struct ib_umem_chunk *chunk;
851 struct mthca_mr *mr;
852 u64 *pages;
853 int shift, n, len;
854 int i, j, k;
855 int err = 0;
856
857 shift = ffs(region->page_size) - 1;
858
859 mr = kmalloc(sizeof *mr, GFP_KERNEL);
860 if (!mr)
861 return ERR_PTR(-ENOMEM);
862
863 n = 0;
864 list_for_each_entry(chunk, &region->chunk_list, list)
865 n += chunk->nents;
866
867 mr->mtt = mthca_alloc_mtt(dev, n);
868 if (IS_ERR(mr->mtt)) {
869 err = PTR_ERR(mr->mtt);
870 goto err;
871 }
872
873 pages = (u64 *) __get_free_page(GFP_KERNEL);
874 if (!pages) {
875 err = -ENOMEM;
876 goto err_mtt;
877 }
878
879 i = n = 0;
880
881 list_for_each_entry(chunk, &region->chunk_list, list)
882 for (j = 0; j < chunk->nmap; ++j) {
883 len = sg_dma_len(&chunk->page_list[j]) >> shift;
884 for (k = 0; k < len; ++k) {
885 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
886 region->page_size * k;
887 /*
888 * Be friendly to WRITE_MTT command
889 * and leave two empty slots for the
890 * index and reserved fields of the
891 * mailbox.
892 */
893 if (i == PAGE_SIZE / sizeof (u64) - 2) {
894 err = mthca_write_mtt(dev, mr->mtt,
895 n, pages, i);
896 if (err)
897 goto mtt_done;
898 n += i;
899 i = 0;
900 }
901 }
902 }
903
904 if (i)
905 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
906 mtt_done:
907 free_page((unsigned long) pages);
908 if (err)
909 goto err_mtt;
910
911 err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, region->virt_base,
912 region->length, convert_access(acc), mr);
913
914 if (err)
915 goto err_mtt;
916
917 return &mr->ibmr;
918
919 err_mtt:
920 mthca_free_mtt(dev, mr->mtt);
921
922 err:
923 kfree(mr);
924 return ERR_PTR(err);
925 }
926
927 static int mthca_dereg_mr(struct ib_mr *mr)
928 {
929 struct mthca_mr *mmr = to_mmr(mr);
930 mthca_free_mr(to_mdev(mr->device), mmr);
931 kfree(mmr);
932 return 0;
933 }
934
935 static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
936 struct ib_fmr_attr *fmr_attr)
937 {
938 struct mthca_fmr *fmr;
939 int err;
940
941 fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
942 if (!fmr)
943 return ERR_PTR(-ENOMEM);
944
945 memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
946 err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
947 convert_access(mr_access_flags), fmr);
948
949 if (err) {
950 kfree(fmr);
951 return ERR_PTR(err);
952 }
953
954 return &fmr->ibmr;
955 }
956
957 static int mthca_dealloc_fmr(struct ib_fmr *fmr)
958 {
959 struct mthca_fmr *mfmr = to_mfmr(fmr);
960 int err;
961
962 err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
963 if (err)
964 return err;
965
966 kfree(mfmr);
967 return 0;
968 }
969
970 static int mthca_unmap_fmr(struct list_head *fmr_list)
971 {
972 struct ib_fmr *fmr;
973 int err;
974 u8 status;
975 struct mthca_dev *mdev = NULL;
976
977 list_for_each_entry(fmr, fmr_list, list) {
978 if (mdev && to_mdev(fmr->device) != mdev)
979 return -EINVAL;
980 mdev = to_mdev(fmr->device);
981 }
982
983 if (!mdev)
984 return 0;
985
986 if (mthca_is_memfree(mdev)) {
987 list_for_each_entry(fmr, fmr_list, list)
988 mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
989
990 wmb();
991 } else
992 list_for_each_entry(fmr, fmr_list, list)
993 mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
994
995 err = mthca_SYNC_TPT(mdev, &status);
996 if (err)
997 return err;
998 if (status)
999 return -EINVAL;
1000 return 0;
1001 }
1002
1003 static ssize_t show_rev(struct class_device *cdev, char *buf)
1004 {
1005 struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1006 return sprintf(buf, "%x\n", dev->rev_id);
1007 }
1008
1009 static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
1010 {
1011 struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1012 return sprintf(buf, "%x.%x.%x\n", (int) (dev->fw_ver >> 32),
1013 (int) (dev->fw_ver >> 16) & 0xffff,
1014 (int) dev->fw_ver & 0xffff);
1015 }
1016
1017 static ssize_t show_hca(struct class_device *cdev, char *buf)
1018 {
1019 struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1020 switch (dev->pdev->device) {
1021 case PCI_DEVICE_ID_MELLANOX_TAVOR:
1022 return sprintf(buf, "MT23108\n");
1023 case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
1024 return sprintf(buf, "MT25208 (MT23108 compat mode)\n");
1025 case PCI_DEVICE_ID_MELLANOX_ARBEL:
1026 return sprintf(buf, "MT25208\n");
1027 case PCI_DEVICE_ID_MELLANOX_SINAI:
1028 case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
1029 return sprintf(buf, "MT25204\n");
1030 default:
1031 return sprintf(buf, "unknown\n");
1032 }
1033 }
1034
1035 static ssize_t show_board(struct class_device *cdev, char *buf)
1036 {
1037 struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1038 return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
1039 }
1040
1041 static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1042 static CLASS_DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
1043 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1044 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
1045
1046 static struct class_device_attribute *mthca_class_attributes[] = {
1047 &class_device_attr_hw_rev,
1048 &class_device_attr_fw_ver,
1049 &class_device_attr_hca_type,
1050 &class_device_attr_board_id
1051 };
1052
1053 int mthca_register_device(struct mthca_dev *dev)
1054 {
1055 int ret;
1056 int i;
1057
1058 strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
1059 dev->ib_dev.owner = THIS_MODULE;
1060
1061 dev->ib_dev.node_type = IB_NODE_CA;
1062 dev->ib_dev.phys_port_cnt = dev->limits.num_ports;
1063 dev->ib_dev.dma_device = &dev->pdev->dev;
1064 dev->ib_dev.class_dev.dev = &dev->pdev->dev;
1065 dev->ib_dev.query_device = mthca_query_device;
1066 dev->ib_dev.query_port = mthca_query_port;
1067 dev->ib_dev.modify_port = mthca_modify_port;
1068 dev->ib_dev.query_pkey = mthca_query_pkey;
1069 dev->ib_dev.query_gid = mthca_query_gid;
1070 dev->ib_dev.alloc_ucontext = mthca_alloc_ucontext;
1071 dev->ib_dev.dealloc_ucontext = mthca_dealloc_ucontext;
1072 dev->ib_dev.mmap = mthca_mmap_uar;
1073 dev->ib_dev.alloc_pd = mthca_alloc_pd;
1074 dev->ib_dev.dealloc_pd = mthca_dealloc_pd;
1075 dev->ib_dev.create_ah = mthca_ah_create;
1076 dev->ib_dev.destroy_ah = mthca_ah_destroy;
1077
1078 if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1079 dev->ib_dev.create_srq = mthca_create_srq;
1080 dev->ib_dev.destroy_srq = mthca_destroy_srq;
1081
1082 if (mthca_is_memfree(dev))
1083 dev->ib_dev.post_srq_recv = mthca_arbel_post_srq_recv;
1084 else
1085 dev->ib_dev.post_srq_recv = mthca_tavor_post_srq_recv;
1086 }
1087
1088 dev->ib_dev.create_qp = mthca_create_qp;
1089 dev->ib_dev.modify_qp = mthca_modify_qp;
1090 dev->ib_dev.destroy_qp = mthca_destroy_qp;
1091 dev->ib_dev.create_cq = mthca_create_cq;
1092 dev->ib_dev.destroy_cq = mthca_destroy_cq;
1093 dev->ib_dev.poll_cq = mthca_poll_cq;
1094 dev->ib_dev.get_dma_mr = mthca_get_dma_mr;
1095 dev->ib_dev.reg_phys_mr = mthca_reg_phys_mr;
1096 dev->ib_dev.reg_user_mr = mthca_reg_user_mr;
1097 dev->ib_dev.dereg_mr = mthca_dereg_mr;
1098
1099 if (dev->mthca_flags & MTHCA_FLAG_FMR) {
1100 dev->ib_dev.alloc_fmr = mthca_alloc_fmr;
1101 dev->ib_dev.unmap_fmr = mthca_unmap_fmr;
1102 dev->ib_dev.dealloc_fmr = mthca_dealloc_fmr;
1103 if (mthca_is_memfree(dev))
1104 dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
1105 else
1106 dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
1107 }
1108
1109 dev->ib_dev.attach_mcast = mthca_multicast_attach;
1110 dev->ib_dev.detach_mcast = mthca_multicast_detach;
1111 dev->ib_dev.process_mad = mthca_process_mad;
1112
1113 if (mthca_is_memfree(dev)) {
1114 dev->ib_dev.req_notify_cq = mthca_arbel_arm_cq;
1115 dev->ib_dev.post_send = mthca_arbel_post_send;
1116 dev->ib_dev.post_recv = mthca_arbel_post_receive;
1117 } else {
1118 dev->ib_dev.req_notify_cq = mthca_tavor_arm_cq;
1119 dev->ib_dev.post_send = mthca_tavor_post_send;
1120 dev->ib_dev.post_recv = mthca_tavor_post_receive;
1121 }
1122
1123 init_MUTEX(&dev->cap_mask_mutex);
1124
1125 ret = ib_register_device(&dev->ib_dev);
1126 if (ret)
1127 return ret;
1128
1129 for (i = 0; i < ARRAY_SIZE(mthca_class_attributes); ++i) {
1130 ret = class_device_create_file(&dev->ib_dev.class_dev,
1131 mthca_class_attributes[i]);
1132 if (ret) {
1133 ib_unregister_device(&dev->ib_dev);
1134 return ret;
1135 }
1136 }
1137
1138 return 0;
1139 }
1140
1141 void mthca_unregister_device(struct mthca_dev *dev)
1142 {
1143 ib_unregister_device(&dev->ib_dev);
1144 }
Linux kernel - Deliverables
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