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kbuild: document howto build external modules using several directories
[linux-2.6/verdex.git] / drivers / infiniband / hw / mthca / mthca_provider.c
blob4cc7e2846df16c08e4f114a7832ca86b066b8cdb
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 <rdma/ib_user_verbs.h>
41 #include <linux/mm.h>
42
43 #include "mthca_dev.h"
44 #include "mthca_cmd.h"
45 #include "mthca_user.h"
46 #include "mthca_memfree.h"
47
48 static int mthca_query_device(struct ib_device *ibdev,
49 struct ib_device_attr *props)
50 {
51 struct ib_smp *in_mad = NULL;
52 struct ib_smp *out_mad = NULL;
53 int err = -ENOMEM;
54 struct mthca_dev* mdev = to_mdev(ibdev);
55
56 u8 status;
57
58 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
59 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
60 if (!in_mad || !out_mad)
61 goto out;
62
63 memset(props, 0, sizeof *props);
64
65 props->fw_ver = mdev->fw_ver;
66
67 memset(in_mad, 0, sizeof *in_mad);
68 in_mad->base_version = 1;
69 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
70 in_mad->class_version = 1;
71 in_mad->method = IB_MGMT_METHOD_GET;
72 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
73
74 err = mthca_MAD_IFC(mdev, 1, 1,
75 1, NULL, NULL, in_mad, out_mad,
76 &status);
77 if (err)
78 goto out;
79 if (status) {
80 err = -EINVAL;
81 goto out;
82 }
83
84 props->device_cap_flags = mdev->device_cap_flags;
85 props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
86 0xffffff;
87 props->vendor_part_id = be16_to_cpup((__be16 *) (out_mad->data + 30));
88 props->hw_ver = be32_to_cpup((__be32 *) (out_mad->data + 32));
89 memcpy(&props->sys_image_guid, out_mad->data + 4, 8);
90 memcpy(&props->node_guid, out_mad->data + 12, 8);
91
92 props->max_mr_size = ~0ull;
93 props->page_size_cap = mdev->limits.page_size_cap;
94 props->max_qp = mdev->limits.num_qps - mdev->limits.reserved_qps;
95 props->max_qp_wr = mdev->limits.max_wqes;
96 props->max_sge = mdev->limits.max_sg;
97 props->max_cq = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
98 props->max_cqe = mdev->limits.max_cqes;
99 props->max_mr = mdev->limits.num_mpts - mdev->limits.reserved_mrws;
100 props->max_pd = mdev->limits.num_pds - mdev->limits.reserved_pds;
101 props->max_qp_rd_atom = 1 << mdev->qp_table.rdb_shift;
102 props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma;
103 props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp;
104 props->max_srq = mdev->limits.num_srqs - mdev->limits.reserved_srqs;
105 props->max_srq_wr = mdev->limits.max_srq_wqes;
106 props->max_srq_sge = mdev->limits.max_sg;
107 props->local_ca_ack_delay = mdev->limits.local_ca_ack_delay;
108 props->atomic_cap = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ?
109 IB_ATOMIC_HCA : IB_ATOMIC_NONE;
110 props->max_pkeys = mdev->limits.pkey_table_len;
111 props->max_mcast_grp = mdev->limits.num_mgms + mdev->limits.num_amgms;
112 props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
113 props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
114 props->max_mcast_grp;
115
116 err = 0;
117 out:
118 kfree(in_mad);
119 kfree(out_mad);
120 return err;
121 }
122
123 static int mthca_query_port(struct ib_device *ibdev,
124 u8 port, struct ib_port_attr *props)
125 {
126 struct ib_smp *in_mad = NULL;
127 struct ib_smp *out_mad = NULL;
128 int err = -ENOMEM;
129 u8 status;
130
131 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
132 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
133 if (!in_mad || !out_mad)
134 goto out;
135
136 memset(props, 0, sizeof *props);
137
138 memset(in_mad, 0, sizeof *in_mad);
139 in_mad->base_version = 1;
140 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
141 in_mad->class_version = 1;
142 in_mad->method = IB_MGMT_METHOD_GET;
143 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
144 in_mad->attr_mod = cpu_to_be32(port);
145
146 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
147 port, NULL, NULL, in_mad, out_mad,
148 &status);
149 if (err)
150 goto out;
151 if (status) {
152 err = -EINVAL;
153 goto out;
154 }
155
156 props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16));
157 props->lmc = out_mad->data[34] & 0x7;
158 props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18));
159 props->sm_sl = out_mad->data[36] & 0xf;
160 props->state = out_mad->data[32] & 0xf;
161 props->phys_state = out_mad->data[33] >> 4;
162 props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20));
163 props->gid_tbl_len = to_mdev(ibdev)->limits.gid_table_len;
164 props->max_msg_sz = 0x80000000;
165 props->pkey_tbl_len = to_mdev(ibdev)->limits.pkey_table_len;
166 props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46));
167 props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48));
168 props->active_width = out_mad->data[31] & 0xf;
169 props->active_speed = out_mad->data[35] >> 4;
170 props->max_mtu = out_mad->data[41] & 0xf;
171 props->active_mtu = out_mad->data[36] >> 4;
172 props->subnet_timeout = out_mad->data[51] & 0x1f;
173
174 out:
175 kfree(in_mad);
176 kfree(out_mad);
177 return err;
178 }
179
180 static int mthca_modify_port(struct ib_device *ibdev,
181 u8 port, int port_modify_mask,
182 struct ib_port_modify *props)
183 {
184 struct mthca_set_ib_param set_ib;
185 struct ib_port_attr attr;
186 int err;
187 u8 status;
188
189 if (down_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
190 return -ERESTARTSYS;
191
192 err = mthca_query_port(ibdev, port, &attr);
193 if (err)
194 goto out;
195
196 set_ib.set_si_guid = 0;
197 set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
198
199 set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
200 ~props->clr_port_cap_mask;
201
202 err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port, &status);
203 if (err)
204 goto out;
205 if (status) {
206 err = -EINVAL;
207 goto out;
208 }
209
210 out:
211 up(&to_mdev(ibdev)->cap_mask_mutex);
212 return err;
213 }
214
215 static int mthca_query_pkey(struct ib_device *ibdev,
216 u8 port, u16 index, u16 *pkey)
217 {
218 struct ib_smp *in_mad = NULL;
219 struct ib_smp *out_mad = NULL;
220 int err = -ENOMEM;
221 u8 status;
222
223 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
224 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
225 if (!in_mad || !out_mad)
226 goto out;
227
228 memset(in_mad, 0, sizeof *in_mad);
229 in_mad->base_version = 1;
230 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
231 in_mad->class_version = 1;
232 in_mad->method = IB_MGMT_METHOD_GET;
233 in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE;
234 in_mad->attr_mod = cpu_to_be32(index / 32);
235
236 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
237 port, NULL, NULL, in_mad, out_mad,
238 &status);
239 if (err)
240 goto out;
241 if (status) {
242 err = -EINVAL;
243 goto out;
244 }
245
246 *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
247
248 out:
249 kfree(in_mad);
250 kfree(out_mad);
251 return err;
252 }
253
254 static int mthca_query_gid(struct ib_device *ibdev, u8 port,
255 int index, union ib_gid *gid)
256 {
257 struct ib_smp *in_mad = NULL;
258 struct ib_smp *out_mad = NULL;
259 int err = -ENOMEM;
260 u8 status;
261
262 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
263 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
264 if (!in_mad || !out_mad)
265 goto out;
266
267 memset(in_mad, 0, sizeof *in_mad);
268 in_mad->base_version = 1;
269 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
270 in_mad->class_version = 1;
271 in_mad->method = IB_MGMT_METHOD_GET;
272 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
273 in_mad->attr_mod = cpu_to_be32(port);
274
275 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
276 port, NULL, NULL, in_mad, out_mad,
277 &status);
278 if (err)
279 goto out;
280 if (status) {
281 err = -EINVAL;
282 goto out;
283 }
284
285 memcpy(gid->raw, out_mad->data + 8, 8);
286
287 memset(in_mad, 0, sizeof *in_mad);
288 in_mad->base_version = 1;
289 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
290 in_mad->class_version = 1;
291 in_mad->method = IB_MGMT_METHOD_GET;
292 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
293 in_mad->attr_mod = cpu_to_be32(index / 8);
294
295 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
296 port, NULL, NULL, in_mad, out_mad,
297 &status);
298 if (err)
299 goto out;
300 if (status) {
301 err = -EINVAL;
302 goto out;
303 }
304
305 memcpy(gid->raw + 8, out_mad->data + (index % 8) * 16, 8);
306
307 out:
308 kfree(in_mad);
309 kfree(out_mad);
310 return err;
311 }
312
313 static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,
314 struct ib_udata *udata)
315 {
316 struct mthca_alloc_ucontext_resp uresp;
317 struct mthca_ucontext *context;
318 int err;
319
320 memset(&uresp, 0, sizeof uresp);
321
322 uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
323 if (mthca_is_memfree(to_mdev(ibdev)))
324 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
325 else
326 uresp.uarc_size = 0;
327
328 context = kmalloc(sizeof *context, GFP_KERNEL);
329 if (!context)
330 return ERR_PTR(-ENOMEM);
331
332 err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
333 if (err) {
334 kfree(context);
335 return ERR_PTR(err);
336 }
337
338 context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
339 if (IS_ERR(context->db_tab)) {
340 err = PTR_ERR(context->db_tab);
341 mthca_uar_free(to_mdev(ibdev), &context->uar);
342 kfree(context);
343 return ERR_PTR(err);
344 }
345
346 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
347 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
348 mthca_uar_free(to_mdev(ibdev), &context->uar);
349 kfree(context);
350 return ERR_PTR(-EFAULT);
351 }
352
353 return &context->ibucontext;
354 }
355
356 static int mthca_dealloc_ucontext(struct ib_ucontext *context)
357 {
358 mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
359 to_mucontext(context)->db_tab);
360 mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
361 kfree(to_mucontext(context));
362
363 return 0;
364 }
365
366 static int mthca_mmap_uar(struct ib_ucontext *context,
367 struct vm_area_struct *vma)
368 {
369 if (vma->vm_end - vma->vm_start != PAGE_SIZE)
370 return -EINVAL;
371
372 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
373
374 if (io_remap_pfn_range(vma, vma->vm_start,
375 to_mucontext(context)->uar.pfn,
376 PAGE_SIZE, vma->vm_page_prot))
377 return -EAGAIN;
378
379 return 0;
380 }
381
382 static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
383 struct ib_ucontext *context,
384 struct ib_udata *udata)
385 {
386 struct mthca_pd *pd;
387 int err;
388
389 pd = kmalloc(sizeof *pd, GFP_KERNEL);
390 if (!pd)
391 return ERR_PTR(-ENOMEM);
392
393 err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
394 if (err) {
395 kfree(pd);
396 return ERR_PTR(err);
397 }
398
399 if (context) {
400 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
401 mthca_pd_free(to_mdev(ibdev), pd);
402 kfree(pd);
403 return ERR_PTR(-EFAULT);
404 }
405 }
406
407 return &pd->ibpd;
408 }
409
410 static int mthca_dealloc_pd(struct ib_pd *pd)
411 {
412 mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
413 kfree(pd);
414
415 return 0;
416 }
417
418 static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
419 struct ib_ah_attr *ah_attr)
420 {
421 int err;
422 struct mthca_ah *ah;
423
424 ah = kmalloc(sizeof *ah, GFP_ATOMIC);
425 if (!ah)
426 return ERR_PTR(-ENOMEM);
427
428 err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
429 if (err) {
430 kfree(ah);
431 return ERR_PTR(err);
432 }
433
434 return &ah->ibah;
435 }
436
437 static int mthca_ah_destroy(struct ib_ah *ah)
438 {
439 mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
440 kfree(ah);
441
442 return 0;
443 }
444
445 static struct ib_srq *mthca_create_srq(struct ib_pd *pd,
446 struct ib_srq_init_attr *init_attr,
447 struct ib_udata *udata)
448 {
449 struct mthca_create_srq ucmd;
450 struct mthca_ucontext *context = NULL;
451 struct mthca_srq *srq;
452 int err;
453
454 srq = kmalloc(sizeof *srq, GFP_KERNEL);
455 if (!srq)
456 return ERR_PTR(-ENOMEM);
457
458 if (pd->uobject) {
459 context = to_mucontext(pd->uobject->context);
460
461 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
462 return ERR_PTR(-EFAULT);
463
464 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
465 context->db_tab, ucmd.db_index,
466 ucmd.db_page);
467
468 if (err)
469 goto err_free;
470
471 srq->mr.ibmr.lkey = ucmd.lkey;
472 srq->db_index = ucmd.db_index;
473 }
474
475 err = mthca_alloc_srq(to_mdev(pd->device), to_mpd(pd),
476 &init_attr->attr, srq);
477
478 if (err && pd->uobject)
479 mthca_unmap_user_db(to_mdev(pd->device), &context->uar,
480 context->db_tab, ucmd.db_index);
481
482 if (err)
483 goto err_free;
484
485 if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof (__u32))) {
486 mthca_free_srq(to_mdev(pd->device), srq);
487 err = -EFAULT;
488 goto err_free;
489 }
490
491 return &srq->ibsrq;
492
493 err_free:
494 kfree(srq);
495
496 return ERR_PTR(err);
497 }
498
499 static int mthca_destroy_srq(struct ib_srq *srq)
500 {
501 struct mthca_ucontext *context;
502
503 if (srq->uobject) {
504 context = to_mucontext(srq->uobject->context);
505
506 mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
507 context->db_tab, to_msrq(srq)->db_index);
508 }
509
510 mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
511 kfree(srq);
512
513 return 0;
514 }
515
516 static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
517 struct ib_qp_init_attr *init_attr,
518 struct ib_udata *udata)
519 {
520 struct mthca_create_qp ucmd;
521 struct mthca_qp *qp;
522 int err;
523
524 switch (init_attr->qp_type) {
525 case IB_QPT_RC:
526 case IB_QPT_UC:
527 case IB_QPT_UD:
528 {
529 struct mthca_ucontext *context;
530
531 qp = kmalloc(sizeof *qp, GFP_KERNEL);
532 if (!qp)
533 return ERR_PTR(-ENOMEM);
534
535 if (pd->uobject) {
536 context = to_mucontext(pd->uobject->context);
537
538 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
539 return ERR_PTR(-EFAULT);
540
541 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
542 context->db_tab,
543 ucmd.sq_db_index, ucmd.sq_db_page);
544 if (err) {
545 kfree(qp);
546 return ERR_PTR(err);
547 }
548
549 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
550 context->db_tab,
551 ucmd.rq_db_index, ucmd.rq_db_page);
552 if (err) {
553 mthca_unmap_user_db(to_mdev(pd->device),
554 &context->uar,
555 context->db_tab,
556 ucmd.sq_db_index);
557 kfree(qp);
558 return ERR_PTR(err);
559 }
560
561 qp->mr.ibmr.lkey = ucmd.lkey;
562 qp->sq.db_index = ucmd.sq_db_index;
563 qp->rq.db_index = ucmd.rq_db_index;
564 }
565
566 err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
567 to_mcq(init_attr->send_cq),
568 to_mcq(init_attr->recv_cq),
569 init_attr->qp_type, init_attr->sq_sig_type,
570 &init_attr->cap, qp);
571
572 if (err && pd->uobject) {
573 context = to_mucontext(pd->uobject->context);
574
575 mthca_unmap_user_db(to_mdev(pd->device),
576 &context->uar,
577 context->db_tab,
578 ucmd.sq_db_index);
579 mthca_unmap_user_db(to_mdev(pd->device),
580 &context->uar,
581 context->db_tab,
582 ucmd.rq_db_index);
583 }
584
585 qp->ibqp.qp_num = qp->qpn;
586 break;
587 }
588 case IB_QPT_SMI:
589 case IB_QPT_GSI:
590 {
591 /* Don't allow userspace to create special QPs */
592 if (pd->uobject)
593 return ERR_PTR(-EINVAL);
594
595 qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
596 if (!qp)
597 return ERR_PTR(-ENOMEM);
598
599 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
600
601 err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
602 to_mcq(init_attr->send_cq),
603 to_mcq(init_attr->recv_cq),
604 init_attr->sq_sig_type, &init_attr->cap,
605 qp->ibqp.qp_num, init_attr->port_num,
606 to_msqp(qp));
607 break;
608 }
609 default:
610 /* Don't support raw QPs */
611 return ERR_PTR(-ENOSYS);
612 }
613
614 if (err) {
615 kfree(qp);
616 return ERR_PTR(err);
617 }
618
619 init_attr->cap.max_send_wr = qp->sq.max;
620 init_attr->cap.max_recv_wr = qp->rq.max;
621 init_attr->cap.max_send_sge = qp->sq.max_gs;
622 init_attr->cap.max_recv_sge = qp->rq.max_gs;
623 init_attr->cap.max_inline_data = qp->max_inline_data;
624
625 return &qp->ibqp;
626 }
627
628 static int mthca_destroy_qp(struct ib_qp *qp)
629 {
630 if (qp->uobject) {
631 mthca_unmap_user_db(to_mdev(qp->device),
632 &to_mucontext(qp->uobject->context)->uar,
633 to_mucontext(qp->uobject->context)->db_tab,
634 to_mqp(qp)->sq.db_index);
635 mthca_unmap_user_db(to_mdev(qp->device),
636 &to_mucontext(qp->uobject->context)->uar,
637 to_mucontext(qp->uobject->context)->db_tab,
638 to_mqp(qp)->rq.db_index);
639 }
640 mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
641 kfree(qp);
642 return 0;
643 }
644
645 static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
646 struct ib_ucontext *context,
647 struct ib_udata *udata)
648 {
649 struct mthca_create_cq ucmd;
650 struct mthca_cq *cq;
651 int nent;
652 int err;
653
654 if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
655 return ERR_PTR(-EINVAL);
656
657 if (context) {
658 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
659 return ERR_PTR(-EFAULT);
660
661 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
662 to_mucontext(context)->db_tab,
663 ucmd.set_db_index, ucmd.set_db_page);
664 if (err)
665 return ERR_PTR(err);
666
667 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
668 to_mucontext(context)->db_tab,
669 ucmd.arm_db_index, ucmd.arm_db_page);
670 if (err)
671 goto err_unmap_set;
672 }
673
674 cq = kmalloc(sizeof *cq, GFP_KERNEL);
675 if (!cq) {
676 err = -ENOMEM;
677 goto err_unmap_arm;
678 }
679
680 if (context) {
681 cq->mr.ibmr.lkey = ucmd.lkey;
682 cq->set_ci_db_index = ucmd.set_db_index;
683 cq->arm_db_index = ucmd.arm_db_index;
684 }
685
686 for (nent = 1; nent <= entries; nent <<= 1)
687 ; /* nothing */
688
689 err = mthca_init_cq(to_mdev(ibdev), nent,
690 context ? to_mucontext(context) : NULL,
691 context ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
692 cq);
693 if (err)
694 goto err_free;
695
696 if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) {
697 mthca_free_cq(to_mdev(ibdev), cq);
698 goto err_free;
699 }
700
701 return &cq->ibcq;
702
703 err_free:
704 kfree(cq);
705
706 err_unmap_arm:
707 if (context)
708 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
709 to_mucontext(context)->db_tab, ucmd.arm_db_index);
710
711 err_unmap_set:
712 if (context)
713 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
714 to_mucontext(context)->db_tab, ucmd.set_db_index);
715
716 return ERR_PTR(err);
717 }
718
719 static int mthca_destroy_cq(struct ib_cq *cq)
720 {
721 if (cq->uobject) {
722 mthca_unmap_user_db(to_mdev(cq->device),
723 &to_mucontext(cq->uobject->context)->uar,
724 to_mucontext(cq->uobject->context)->db_tab,
725 to_mcq(cq)->arm_db_index);
726 mthca_unmap_user_db(to_mdev(cq->device),
727 &to_mucontext(cq->uobject->context)->uar,
728 to_mucontext(cq->uobject->context)->db_tab,
729 to_mcq(cq)->set_ci_db_index);
730 }
731 mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
732 kfree(cq);
733
734 return 0;
735 }
736
737 static inline u32 convert_access(int acc)
738 {
739 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) |
740 (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
741 (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) |
742 (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) |
743 MTHCA_MPT_FLAG_LOCAL_READ;
744 }
745
746 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
747 {
748 struct mthca_mr *mr;
749 int err;
750
751 mr = kmalloc(sizeof *mr, GFP_KERNEL);
752 if (!mr)
753 return ERR_PTR(-ENOMEM);
754
755 err = mthca_mr_alloc_notrans(to_mdev(pd->device),
756 to_mpd(pd)->pd_num,
757 convert_access(acc), mr);
758
759 if (err) {
760 kfree(mr);
761 return ERR_PTR(err);
762 }
763
764 return &mr->ibmr;
765 }
766
767 static struct ib_mr *mthca_reg_phys_mr(struct ib_pd *pd,
768 struct ib_phys_buf *buffer_list,
769 int num_phys_buf,
770 int acc,
771 u64 *iova_start)
772 {
773 struct mthca_mr *mr;
774 u64 *page_list;
775 u64 total_size;
776 u64 mask;
777 int shift;
778 int npages;
779 int err;
780 int i, j, n;
781
782 /* First check that we have enough alignment */
783 if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK))
784 return ERR_PTR(-EINVAL);
785
786 if (num_phys_buf > 1 &&
787 ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK))
788 return ERR_PTR(-EINVAL);
789
790 mask = 0;
791 total_size = 0;
792 for (i = 0; i < num_phys_buf; ++i) {
793 if (i != 0 && buffer_list[i].addr & ~PAGE_MASK)
794 return ERR_PTR(-EINVAL);
795 if (i != 0 && i != num_phys_buf - 1 &&
796 (buffer_list[i].size & ~PAGE_MASK))
797 return ERR_PTR(-EINVAL);
798
799 total_size += buffer_list[i].size;
800 if (i > 0)
801 mask |= buffer_list[i].addr;
802 }
803
804 /* Find largest page shift we can use to cover buffers */
805 for (shift = PAGE_SHIFT; shift < 31; ++shift)
806 if (num_phys_buf > 1) {
807 if ((1ULL << shift) & mask)
808 break;
809 } else {
810 if (1ULL << shift >=
811 buffer_list[0].size +
812 (buffer_list[0].addr & ((1ULL << shift) - 1)))
813 break;
814 }
815
816 buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
817 buffer_list[0].addr &= ~0ull << shift;
818
819 mr = kmalloc(sizeof *mr, GFP_KERNEL);
820 if (!mr)
821 return ERR_PTR(-ENOMEM);
822
823 npages = 0;
824 for (i = 0; i < num_phys_buf; ++i)
825 npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
826
827 if (!npages)
828 return &mr->ibmr;
829
830 page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
831 if (!page_list) {
832 kfree(mr);
833 return ERR_PTR(-ENOMEM);
834 }
835
836 n = 0;
837 for (i = 0; i < num_phys_buf; ++i)
838 for (j = 0;
839 j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
840 ++j)
841 page_list[n++] = buffer_list[i].addr + ((u64) j << shift);
842
843 mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
844 "in PD %x; shift %d, npages %d.\n",
845 (unsigned long long) buffer_list[0].addr,
846 (unsigned long long) *iova_start,
847 to_mpd(pd)->pd_num,
848 shift, npages);
849
850 err = mthca_mr_alloc_phys(to_mdev(pd->device),
851 to_mpd(pd)->pd_num,
852 page_list, shift, npages,
853 *iova_start, total_size,
854 convert_access(acc), mr);
855
856 if (err) {
857 kfree(page_list);
858 kfree(mr);
859 return ERR_PTR(err);
860 }
861
862 kfree(page_list);
863 return &mr->ibmr;
864 }
865
866 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
867 int acc, struct ib_udata *udata)
868 {
869 struct mthca_dev *dev = to_mdev(pd->device);
870 struct ib_umem_chunk *chunk;
871 struct mthca_mr *mr;
872 u64 *pages;
873 int shift, n, len;
874 int i, j, k;
875 int err = 0;
876
877 shift = ffs(region->page_size) - 1;
878
879 mr = kmalloc(sizeof *mr, GFP_KERNEL);
880 if (!mr)
881 return ERR_PTR(-ENOMEM);
882
883 n = 0;
884 list_for_each_entry(chunk, &region->chunk_list, list)
885 n += chunk->nents;
886
887 mr->mtt = mthca_alloc_mtt(dev, n);
888 if (IS_ERR(mr->mtt)) {
889 err = PTR_ERR(mr->mtt);
890 goto err;
891 }
892
893 pages = (u64 *) __get_free_page(GFP_KERNEL);
894 if (!pages) {
895 err = -ENOMEM;
896 goto err_mtt;
897 }
898
899 i = n = 0;
900
901 list_for_each_entry(chunk, &region->chunk_list, list)
902 for (j = 0; j < chunk->nmap; ++j) {
903 len = sg_dma_len(&chunk->page_list[j]) >> shift;
904 for (k = 0; k < len; ++k) {
905 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
906 region->page_size * k;
907 /*
908 * Be friendly to WRITE_MTT command
909 * and leave two empty slots for the
910 * index and reserved fields of the
911 * mailbox.
912 */
913 if (i == PAGE_SIZE / sizeof (u64) - 2) {
914 err = mthca_write_mtt(dev, mr->mtt,
915 n, pages, i);
916 if (err)
917 goto mtt_done;
918 n += i;
919 i = 0;
920 }
921 }
922 }
923
924 if (i)
925 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
926 mtt_done:
927 free_page((unsigned long) pages);
928 if (err)
929 goto err_mtt;
930
931 err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, region->virt_base,
932 region->length, convert_access(acc), mr);
933
934 if (err)
935 goto err_mtt;
936
937 return &mr->ibmr;
938
939 err_mtt:
940 mthca_free_mtt(dev, mr->mtt);
941
942 err:
943 kfree(mr);
944 return ERR_PTR(err);
945 }
946
947 static int mthca_dereg_mr(struct ib_mr *mr)
948 {
949 struct mthca_mr *mmr = to_mmr(mr);
950 mthca_free_mr(to_mdev(mr->device), mmr);
951 kfree(mmr);
952 return 0;
953 }
954
955 static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
956 struct ib_fmr_attr *fmr_attr)
957 {
958 struct mthca_fmr *fmr;
959 int err;
960
961 fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
962 if (!fmr)
963 return ERR_PTR(-ENOMEM);
964
965 memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
966 err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
967 convert_access(mr_access_flags), fmr);
968
969 if (err) {
970 kfree(fmr);
971 return ERR_PTR(err);
972 }
973
974 return &fmr->ibmr;
975 }
976
977 static int mthca_dealloc_fmr(struct ib_fmr *fmr)
978 {
979 struct mthca_fmr *mfmr = to_mfmr(fmr);
980 int err;
981
982 err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
983 if (err)
984 return err;
985
986 kfree(mfmr);
987 return 0;
988 }
989
990 static int mthca_unmap_fmr(struct list_head *fmr_list)
991 {
992 struct ib_fmr *fmr;
993 int err;
994 u8 status;
995 struct mthca_dev *mdev = NULL;
996
997 list_for_each_entry(fmr, fmr_list, list) {
998 if (mdev && to_mdev(fmr->device) != mdev)
999 return -EINVAL;
1000 mdev = to_mdev(fmr->device);
1001 }
1002
1003 if (!mdev)
1004 return 0;
1005
1006 if (mthca_is_memfree(mdev)) {
1007 list_for_each_entry(fmr, fmr_list, list)
1008 mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
1009
1010 wmb();
1011 } else
1012 list_for_each_entry(fmr, fmr_list, list)
1013 mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
1014
1015 err = mthca_SYNC_TPT(mdev, &status);
1016 if (err)
1017 return err;
1018 if (status)
1019 return -EINVAL;
1020 return 0;
1021 }
1022
1023 static ssize_t show_rev(struct class_device *cdev, char *buf)
1024 {
1025 struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1026 return sprintf(buf, "%x\n", dev->rev_id);
1027 }
1028
1029 static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
1030 {
1031 struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1032 return sprintf(buf, "%d.%d.%d\n", (int) (dev->fw_ver >> 32),
1033 (int) (dev->fw_ver >> 16) & 0xffff,
1034 (int) dev->fw_ver & 0xffff);
1035 }
1036
1037 static ssize_t show_hca(struct class_device *cdev, char *buf)
1038 {
1039 struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1040 switch (dev->pdev->device) {
1041 case PCI_DEVICE_ID_MELLANOX_TAVOR:
1042 return sprintf(buf, "MT23108\n");
1043 case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
1044 return sprintf(buf, "MT25208 (MT23108 compat mode)\n");
1045 case PCI_DEVICE_ID_MELLANOX_ARBEL:
1046 return sprintf(buf, "MT25208\n");
1047 case PCI_DEVICE_ID_MELLANOX_SINAI:
1048 case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
1049 return sprintf(buf, "MT25204\n");
1050 default:
1051 return sprintf(buf, "unknown\n");
1052 }
1053 }
1054
1055 static ssize_t show_board(struct class_device *cdev, char *buf)
1056 {
1057 struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1058 return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
1059 }
1060
1061 static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1062 static CLASS_DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
1063 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1064 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
1065
1066 static struct class_device_attribute *mthca_class_attributes[] = {
1067 &class_device_attr_hw_rev,
1068 &class_device_attr_fw_ver,
1069 &class_device_attr_hca_type,
1070 &class_device_attr_board_id
1071 };
1072
1073 int mthca_register_device(struct mthca_dev *dev)
1074 {
1075 int ret;
1076 int i;
1077
1078 strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
1079 dev->ib_dev.owner = THIS_MODULE;
1080
1081 dev->ib_dev.uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION;
1082 dev->ib_dev.uverbs_cmd_mask =
1083 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
1084 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
1085 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
1086 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
1087 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
1088 (1ull << IB_USER_VERBS_CMD_REG_MR) |
1089 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
1090 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1091 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
1092 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
1093 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
1094 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
1095 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
1096 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
1097 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
1098 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
1099 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
1100 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
1101 dev->ib_dev.node_type = IB_NODE_CA;
1102 dev->ib_dev.phys_port_cnt = dev->limits.num_ports;
1103 dev->ib_dev.dma_device = &dev->pdev->dev;
1104 dev->ib_dev.class_dev.dev = &dev->pdev->dev;
1105 dev->ib_dev.query_device = mthca_query_device;
1106 dev->ib_dev.query_port = mthca_query_port;
1107 dev->ib_dev.modify_port = mthca_modify_port;
1108 dev->ib_dev.query_pkey = mthca_query_pkey;
1109 dev->ib_dev.query_gid = mthca_query_gid;
1110 dev->ib_dev.alloc_ucontext = mthca_alloc_ucontext;
1111 dev->ib_dev.dealloc_ucontext = mthca_dealloc_ucontext;
1112 dev->ib_dev.mmap = mthca_mmap_uar;
1113 dev->ib_dev.alloc_pd = mthca_alloc_pd;
1114 dev->ib_dev.dealloc_pd = mthca_dealloc_pd;
1115 dev->ib_dev.create_ah = mthca_ah_create;
1116 dev->ib_dev.destroy_ah = mthca_ah_destroy;
1117
1118 if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1119 dev->ib_dev.create_srq = mthca_create_srq;
1120 dev->ib_dev.modify_srq = mthca_modify_srq;
1121 dev->ib_dev.destroy_srq = mthca_destroy_srq;
1122
1123 if (mthca_is_memfree(dev))
1124 dev->ib_dev.post_srq_recv = mthca_arbel_post_srq_recv;
1125 else
1126 dev->ib_dev.post_srq_recv = mthca_tavor_post_srq_recv;
1127 }
1128
1129 dev->ib_dev.create_qp = mthca_create_qp;
1130 dev->ib_dev.modify_qp = mthca_modify_qp;
1131 dev->ib_dev.destroy_qp = mthca_destroy_qp;
1132 dev->ib_dev.create_cq = mthca_create_cq;
1133 dev->ib_dev.destroy_cq = mthca_destroy_cq;
1134 dev->ib_dev.poll_cq = mthca_poll_cq;
1135 dev->ib_dev.get_dma_mr = mthca_get_dma_mr;
1136 dev->ib_dev.reg_phys_mr = mthca_reg_phys_mr;
1137 dev->ib_dev.reg_user_mr = mthca_reg_user_mr;
1138 dev->ib_dev.dereg_mr = mthca_dereg_mr;
1139
1140 if (dev->mthca_flags & MTHCA_FLAG_FMR) {
1141 dev->ib_dev.alloc_fmr = mthca_alloc_fmr;
1142 dev->ib_dev.unmap_fmr = mthca_unmap_fmr;
1143 dev->ib_dev.dealloc_fmr = mthca_dealloc_fmr;
1144 if (mthca_is_memfree(dev))
1145 dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
1146 else
1147 dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
1148 }
1149
1150 dev->ib_dev.attach_mcast = mthca_multicast_attach;
1151 dev->ib_dev.detach_mcast = mthca_multicast_detach;
1152 dev->ib_dev.process_mad = mthca_process_mad;
1153
1154 if (mthca_is_memfree(dev)) {
1155 dev->ib_dev.req_notify_cq = mthca_arbel_arm_cq;
1156 dev->ib_dev.post_send = mthca_arbel_post_send;
1157 dev->ib_dev.post_recv = mthca_arbel_post_receive;
1158 } else {
1159 dev->ib_dev.req_notify_cq = mthca_tavor_arm_cq;
1160 dev->ib_dev.post_send = mthca_tavor_post_send;
1161 dev->ib_dev.post_recv = mthca_tavor_post_receive;
1162 }
1163
1164 init_MUTEX(&dev->cap_mask_mutex);
1165
1166 ret = ib_register_device(&dev->ib_dev);
1167 if (ret)
1168 return ret;
1169
1170 for (i = 0; i < ARRAY_SIZE(mthca_class_attributes); ++i) {
1171 ret = class_device_create_file(&dev->ib_dev.class_dev,
1172 mthca_class_attributes[i]);
1173 if (ret) {
1174 ib_unregister_device(&dev->ib_dev);
1175 return ret;
1176 }
1177 }
1178
1179 mthca_start_catas_poll(dev);
1180
1181 return 0;
1182 }
1183
1184 void mthca_unregister_device(struct mthca_dev *dev)
1185 {
1186 mthca_stop_catas_poll(dev);
1187 ib_unregister_device(&dev->ib_dev);
1188 }
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