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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, 2006 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
37#include <rdma/ib_smi.h>
38#include <rdma/ib_umem.h>
39#include <rdma/ib_user_verbs.h>
40#include <rdma/uverbs_ioctl.h>
41
42#include <linux/sched.h>
43#include <linux/slab.h>
44#include <linux/stat.h>
45#include <linux/mm.h>
46#include <linux/export.h>
47
48#include "mthca_dev.h"
49#include "mthca_cmd.h"
50#include <rdma/mthca-abi.h>
51#include "mthca_memfree.h"
52
53static int mthca_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
54 struct ib_udata *uhw)
55{
56 struct ib_smp *in_mad;
57 struct ib_smp *out_mad;
58 int err = -ENOMEM;
59 struct mthca_dev *mdev = to_mdev(ibdev);
60
61 if (uhw->inlen || uhw->outlen)
62 return -EINVAL;
63
64 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
65 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
66 if (!in_mad || !out_mad)
67 goto out;
68
69 memset(props, 0, sizeof *props);
70
71 props->fw_ver = mdev->fw_ver;
72
73 ib_init_query_mad(in_mad);
74 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
75
76 err = mthca_MAD_IFC(mdev, 1, 1,
77 1, NULL, NULL, in_mad, out_mad);
78 if (err)
79 goto out;
80
81 props->device_cap_flags = mdev->device_cap_flags;
82 props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
83 0xffffff;
84 props->vendor_part_id = be16_to_cpup((__be16 *) (out_mad->data + 30));
85 props->hw_ver = be32_to_cpup((__be32 *) (out_mad->data + 32));
86 memcpy(&props->sys_image_guid, out_mad->data + 4, 8);
87
88 props->max_mr_size = ~0ull;
89 props->page_size_cap = mdev->limits.page_size_cap;
90 props->max_qp = mdev->limits.num_qps - mdev->limits.reserved_qps;
91 props->max_qp_wr = mdev->limits.max_wqes;
92 props->max_send_sge = mdev->limits.max_sg;
93 props->max_recv_sge = mdev->limits.max_sg;
94 props->max_sge_rd = mdev->limits.max_sg;
95 props->max_cq = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
96 props->max_cqe = mdev->limits.max_cqes;
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 = mdev->limits.max_qp_init_rdma;
101 props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp;
102 props->max_srq = mdev->limits.num_srqs - mdev->limits.reserved_srqs;
103 props->max_srq_wr = mdev->limits.max_srq_wqes;
104 props->max_srq_sge = mdev->limits.max_srq_sge;
105 props->local_ca_ack_delay = mdev->limits.local_ca_ack_delay;
106 props->atomic_cap = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ?
107 IB_ATOMIC_HCA : IB_ATOMIC_NONE;
108 props->max_pkeys = mdev->limits.pkey_table_len;
109 props->max_mcast_grp = mdev->limits.num_mgms + mdev->limits.num_amgms;
110 props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
111 props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
112 props->max_mcast_grp;
113
114 err = 0;
115 out:
116 kfree(in_mad);
117 kfree(out_mad);
118 return err;
119}
120
121static int mthca_query_port(struct ib_device *ibdev,
122 u32 port, struct ib_port_attr *props)
123{
124 struct ib_smp *in_mad;
125 struct ib_smp *out_mad;
126 int err = -ENOMEM;
127
128 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
129 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
130 if (!in_mad || !out_mad)
131 goto out;
132
133 /* props being zeroed by the caller, avoid zeroing it here */
134
135 ib_init_query_mad(in_mad);
136 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
137 in_mad->attr_mod = cpu_to_be32(port);
138
139 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
140 port, NULL, NULL, in_mad, out_mad);
141 if (err)
142 goto out;
143
144 props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16));
145 props->lmc = out_mad->data[34] & 0x7;
146 props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18));
147 props->sm_sl = out_mad->data[36] & 0xf;
148 props->state = out_mad->data[32] & 0xf;
149 props->phys_state = out_mad->data[33] >> 4;
150 props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20));
151 props->gid_tbl_len = to_mdev(ibdev)->limits.gid_table_len;
152 props->max_msg_sz = 0x80000000;
153 props->pkey_tbl_len = to_mdev(ibdev)->limits.pkey_table_len;
154 props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46));
155 props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48));
156 props->active_width = out_mad->data[31] & 0xf;
157 props->active_speed = out_mad->data[35] >> 4;
158 props->max_mtu = out_mad->data[41] & 0xf;
159 props->active_mtu = out_mad->data[36] >> 4;
160 props->subnet_timeout = out_mad->data[51] & 0x1f;
161 props->max_vl_num = out_mad->data[37] >> 4;
162 props->init_type_reply = out_mad->data[41] >> 4;
163
164 out:
165 kfree(in_mad);
166 kfree(out_mad);
167 return err;
168}
169
170static int mthca_modify_device(struct ib_device *ibdev,
171 int mask,
172 struct ib_device_modify *props)
173{
174 if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
175 return -EOPNOTSUPP;
176
177 if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
178 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
179 return -ERESTARTSYS;
180 memcpy(ibdev->node_desc, props->node_desc,
181 IB_DEVICE_NODE_DESC_MAX);
182 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
183 }
184
185 return 0;
186}
187
188static int mthca_modify_port(struct ib_device *ibdev,
189 u32 port, int port_modify_mask,
190 struct ib_port_modify *props)
191{
192 struct mthca_set_ib_param set_ib;
193 struct ib_port_attr attr;
194 int err;
195
196 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
197 return -ERESTARTSYS;
198
199 err = ib_query_port(ibdev, port, &attr);
200 if (err)
201 goto out;
202
203 set_ib.set_si_guid = 0;
204 set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
205
206 set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
207 ~props->clr_port_cap_mask;
208
209 err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port);
210 if (err)
211 goto out;
212out:
213 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
214 return err;
215}
216
217static int mthca_query_pkey(struct ib_device *ibdev,
218 u32 port, u16 index, u16 *pkey)
219{
220 struct ib_smp *in_mad;
221 struct ib_smp *out_mad;
222 int err = -ENOMEM;
223
224 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
225 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
226 if (!in_mad || !out_mad)
227 goto out;
228
229 ib_init_query_mad(in_mad);
230 in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE;
231 in_mad->attr_mod = cpu_to_be32(index / 32);
232
233 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
234 port, NULL, NULL, in_mad, out_mad);
235 if (err)
236 goto out;
237
238 *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
239
240 out:
241 kfree(in_mad);
242 kfree(out_mad);
243 return err;
244}
245
246static int mthca_query_gid(struct ib_device *ibdev, u32 port,
247 int index, union ib_gid *gid)
248{
249 struct ib_smp *in_mad;
250 struct ib_smp *out_mad;
251 int err = -ENOMEM;
252
253 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
254 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
255 if (!in_mad || !out_mad)
256 goto out;
257
258 ib_init_query_mad(in_mad);
259 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
260 in_mad->attr_mod = cpu_to_be32(port);
261
262 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
263 port, NULL, NULL, in_mad, out_mad);
264 if (err)
265 goto out;
266
267 memcpy(gid->raw, out_mad->data + 8, 8);
268
269 ib_init_query_mad(in_mad);
270 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
271 in_mad->attr_mod = cpu_to_be32(index / 8);
272
273 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
274 port, NULL, NULL, in_mad, out_mad);
275 if (err)
276 goto out;
277
278 memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
279
280 out:
281 kfree(in_mad);
282 kfree(out_mad);
283 return err;
284}
285
286static int mthca_alloc_ucontext(struct ib_ucontext *uctx,
287 struct ib_udata *udata)
288{
289 struct ib_device *ibdev = uctx->device;
290 struct mthca_alloc_ucontext_resp uresp = {};
291 struct mthca_ucontext *context = to_mucontext(uctx);
292 int err;
293
294 if (!(to_mdev(ibdev)->active))
295 return -EAGAIN;
296
297 uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
298 if (mthca_is_memfree(to_mdev(ibdev)))
299 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
300 else
301 uresp.uarc_size = 0;
302
303 err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
304 if (err)
305 return err;
306
307 context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
308 if (IS_ERR(context->db_tab)) {
309 err = PTR_ERR(context->db_tab);
310 mthca_uar_free(to_mdev(ibdev), &context->uar);
311 return err;
312 }
313
314 if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
315 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
316 mthca_uar_free(to_mdev(ibdev), &context->uar);
317 return -EFAULT;
318 }
319
320 context->reg_mr_warned = 0;
321
322 return 0;
323}
324
325static void mthca_dealloc_ucontext(struct ib_ucontext *context)
326{
327 mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
328 to_mucontext(context)->db_tab);
329 mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
330}
331
332static int mthca_mmap_uar(struct ib_ucontext *context,
333 struct vm_area_struct *vma)
334{
335 if (vma->vm_end - vma->vm_start != PAGE_SIZE)
336 return -EINVAL;
337
338 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
339
340 if (io_remap_pfn_range(vma, vma->vm_start,
341 to_mucontext(context)->uar.pfn,
342 PAGE_SIZE, vma->vm_page_prot))
343 return -EAGAIN;
344
345 return 0;
346}
347
348static int mthca_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
349{
350 struct ib_device *ibdev = ibpd->device;
351 struct mthca_pd *pd = to_mpd(ibpd);
352 int err;
353
354 err = mthca_pd_alloc(to_mdev(ibdev), !udata, pd);
355 if (err)
356 return err;
357
358 if (udata) {
359 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
360 mthca_pd_free(to_mdev(ibdev), pd);
361 return -EFAULT;
362 }
363 }
364
365 return 0;
366}
367
368static int mthca_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
369{
370 mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
371 return 0;
372}
373
374static int mthca_ah_create(struct ib_ah *ibah,
375 struct rdma_ah_init_attr *init_attr,
376 struct ib_udata *udata)
377
378{
379 struct mthca_ah *ah = to_mah(ibah);
380
381 return mthca_create_ah(to_mdev(ibah->device), to_mpd(ibah->pd),
382 init_attr->ah_attr, ah);
383}
384
385static int mthca_ah_destroy(struct ib_ah *ah, u32 flags)
386{
387 mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
388 return 0;
389}
390
391static int mthca_create_srq(struct ib_srq *ibsrq,
392 struct ib_srq_init_attr *init_attr,
393 struct ib_udata *udata)
394{
395 struct mthca_create_srq ucmd;
396 struct mthca_ucontext *context = rdma_udata_to_drv_context(
397 udata, struct mthca_ucontext, ibucontext);
398 struct mthca_srq *srq = to_msrq(ibsrq);
399 int err;
400
401 if (init_attr->srq_type != IB_SRQT_BASIC)
402 return -EOPNOTSUPP;
403
404 if (udata) {
405 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
406 return -EFAULT;
407
408 err = mthca_map_user_db(to_mdev(ibsrq->device), &context->uar,
409 context->db_tab, ucmd.db_index,
410 ucmd.db_page);
411
412 if (err)
413 return err;
414
415 srq->mr.ibmr.lkey = ucmd.lkey;
416 srq->db_index = ucmd.db_index;
417 }
418
419 err = mthca_alloc_srq(to_mdev(ibsrq->device), to_mpd(ibsrq->pd),
420 &init_attr->attr, srq, udata);
421
422 if (err && udata)
423 mthca_unmap_user_db(to_mdev(ibsrq->device), &context->uar,
424 context->db_tab, ucmd.db_index);
425
426 if (err)
427 return err;
428
429 if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof(__u32))) {
430 mthca_free_srq(to_mdev(ibsrq->device), srq);
431 return -EFAULT;
432 }
433
434 return 0;
435}
436
437static int mthca_destroy_srq(struct ib_srq *srq, struct ib_udata *udata)
438{
439 if (udata) {
440 struct mthca_ucontext *context =
441 rdma_udata_to_drv_context(
442 udata,
443 struct mthca_ucontext,
444 ibucontext);
445
446 mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
447 context->db_tab, to_msrq(srq)->db_index);
448 }
449
450 mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
451 return 0;
452}
453
454static int mthca_create_qp(struct ib_qp *ibqp,
455 struct ib_qp_init_attr *init_attr,
456 struct ib_udata *udata)
457{
458 struct mthca_ucontext *context = rdma_udata_to_drv_context(
459 udata, struct mthca_ucontext, ibucontext);
460 struct mthca_create_qp ucmd;
461 struct mthca_qp *qp = to_mqp(ibqp);
462 struct mthca_dev *dev = to_mdev(ibqp->device);
463 int err;
464
465 if (init_attr->create_flags)
466 return -EOPNOTSUPP;
467
468 switch (init_attr->qp_type) {
469 case IB_QPT_RC:
470 case IB_QPT_UC:
471 case IB_QPT_UD:
472 {
473 if (udata) {
474 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
475 return -EFAULT;
476
477 err = mthca_map_user_db(dev, &context->uar,
478 context->db_tab,
479 ucmd.sq_db_index,
480 ucmd.sq_db_page);
481 if (err)
482 return err;
483
484 err = mthca_map_user_db(dev, &context->uar,
485 context->db_tab,
486 ucmd.rq_db_index,
487 ucmd.rq_db_page);
488 if (err) {
489 mthca_unmap_user_db(dev, &context->uar,
490 context->db_tab,
491 ucmd.sq_db_index);
492 return err;
493 }
494
495 qp->mr.ibmr.lkey = ucmd.lkey;
496 qp->sq.db_index = ucmd.sq_db_index;
497 qp->rq.db_index = ucmd.rq_db_index;
498 }
499
500 err = mthca_alloc_qp(dev, to_mpd(ibqp->pd),
501 to_mcq(init_attr->send_cq),
502 to_mcq(init_attr->recv_cq),
503 init_attr->qp_type, init_attr->sq_sig_type,
504 &init_attr->cap, qp, udata);
505
506 if (err && udata) {
507 mthca_unmap_user_db(dev, &context->uar, context->db_tab,
508 ucmd.sq_db_index);
509 mthca_unmap_user_db(dev, &context->uar, context->db_tab,
510 ucmd.rq_db_index);
511 }
512
513 qp->ibqp.qp_num = qp->qpn;
514 break;
515 }
516 case IB_QPT_SMI:
517 case IB_QPT_GSI:
518 {
519 qp->sqp = kzalloc(sizeof(struct mthca_sqp), GFP_KERNEL);
520 if (!qp->sqp)
521 return -ENOMEM;
522
523 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
524
525 err = mthca_alloc_sqp(dev, to_mpd(ibqp->pd),
526 to_mcq(init_attr->send_cq),
527 to_mcq(init_attr->recv_cq),
528 init_attr->sq_sig_type, &init_attr->cap,
529 qp->ibqp.qp_num, init_attr->port_num, qp,
530 udata);
531 break;
532 }
533 default:
534 /* Don't support raw QPs */
535 return -EOPNOTSUPP;
536 }
537
538 if (err) {
539 kfree(qp->sqp);
540 return err;
541 }
542
543 init_attr->cap.max_send_wr = qp->sq.max;
544 init_attr->cap.max_recv_wr = qp->rq.max;
545 init_attr->cap.max_send_sge = qp->sq.max_gs;
546 init_attr->cap.max_recv_sge = qp->rq.max_gs;
547 init_attr->cap.max_inline_data = qp->max_inline_data;
548
549 return 0;
550}
551
552static int mthca_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
553{
554 if (udata) {
555 struct mthca_ucontext *context =
556 rdma_udata_to_drv_context(
557 udata,
558 struct mthca_ucontext,
559 ibucontext);
560
561 mthca_unmap_user_db(to_mdev(qp->device),
562 &context->uar,
563 context->db_tab,
564 to_mqp(qp)->sq.db_index);
565 mthca_unmap_user_db(to_mdev(qp->device),
566 &context->uar,
567 context->db_tab,
568 to_mqp(qp)->rq.db_index);
569 }
570 mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
571 kfree(to_mqp(qp)->sqp);
572 return 0;
573}
574
575static int mthca_create_cq(struct ib_cq *ibcq,
576 const struct ib_cq_init_attr *attr,
577 struct ib_udata *udata)
578{
579 struct ib_device *ibdev = ibcq->device;
580 int entries = attr->cqe;
581 struct mthca_create_cq ucmd;
582 struct mthca_cq *cq;
583 int nent;
584 int err;
585 struct mthca_ucontext *context = rdma_udata_to_drv_context(
586 udata, struct mthca_ucontext, ibucontext);
587
588 if (attr->flags)
589 return -EOPNOTSUPP;
590
591 if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
592 return -EINVAL;
593
594 if (udata) {
595 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
596 return -EFAULT;
597
598 err = mthca_map_user_db(to_mdev(ibdev), &context->uar,
599 context->db_tab, ucmd.set_db_index,
600 ucmd.set_db_page);
601 if (err)
602 return err;
603
604 err = mthca_map_user_db(to_mdev(ibdev), &context->uar,
605 context->db_tab, ucmd.arm_db_index,
606 ucmd.arm_db_page);
607 if (err)
608 goto err_unmap_set;
609 }
610
611 cq = to_mcq(ibcq);
612
613 if (udata) {
614 cq->buf.mr.ibmr.lkey = ucmd.lkey;
615 cq->set_ci_db_index = ucmd.set_db_index;
616 cq->arm_db_index = ucmd.arm_db_index;
617 }
618
619 for (nent = 1; nent <= entries; nent <<= 1)
620 ; /* nothing */
621
622 err = mthca_init_cq(to_mdev(ibdev), nent, context,
623 udata ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
624 cq);
625 if (err)
626 goto err_unmap_arm;
627
628 if (udata && ib_copy_to_udata(udata, &cq->cqn, sizeof(__u32))) {
629 mthca_free_cq(to_mdev(ibdev), cq);
630 err = -EFAULT;
631 goto err_unmap_arm;
632 }
633
634 cq->resize_buf = NULL;
635
636 return 0;
637
638err_unmap_arm:
639 if (udata)
640 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
641 context->db_tab, ucmd.arm_db_index);
642
643err_unmap_set:
644 if (udata)
645 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
646 context->db_tab, ucmd.set_db_index);
647
648 return err;
649}
650
651static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq,
652 int entries)
653{
654 int ret;
655
656 spin_lock_irq(&cq->lock);
657 if (cq->resize_buf) {
658 ret = -EBUSY;
659 goto unlock;
660 }
661
662 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
663 if (!cq->resize_buf) {
664 ret = -ENOMEM;
665 goto unlock;
666 }
667
668 cq->resize_buf->state = CQ_RESIZE_ALLOC;
669
670 ret = 0;
671
672unlock:
673 spin_unlock_irq(&cq->lock);
674
675 if (ret)
676 return ret;
677
678 ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
679 if (ret) {
680 spin_lock_irq(&cq->lock);
681 kfree(cq->resize_buf);
682 cq->resize_buf = NULL;
683 spin_unlock_irq(&cq->lock);
684 return ret;
685 }
686
687 cq->resize_buf->cqe = entries - 1;
688
689 spin_lock_irq(&cq->lock);
690 cq->resize_buf->state = CQ_RESIZE_READY;
691 spin_unlock_irq(&cq->lock);
692
693 return 0;
694}
695
696static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
697{
698 struct mthca_dev *dev = to_mdev(ibcq->device);
699 struct mthca_cq *cq = to_mcq(ibcq);
700 struct mthca_resize_cq ucmd;
701 u32 lkey;
702 int ret;
703
704 if (entries < 1 || entries > dev->limits.max_cqes)
705 return -EINVAL;
706
707 mutex_lock(&cq->mutex);
708
709 entries = roundup_pow_of_two(entries + 1);
710 if (entries == ibcq->cqe + 1) {
711 ret = 0;
712 goto out;
713 }
714
715 if (cq->is_kernel) {
716 ret = mthca_alloc_resize_buf(dev, cq, entries);
717 if (ret)
718 goto out;
719 lkey = cq->resize_buf->buf.mr.ibmr.lkey;
720 } else {
721 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
722 ret = -EFAULT;
723 goto out;
724 }
725 lkey = ucmd.lkey;
726 }
727
728 ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries));
729
730 if (ret) {
731 if (cq->resize_buf) {
732 mthca_free_cq_buf(dev, &cq->resize_buf->buf,
733 cq->resize_buf->cqe);
734 kfree(cq->resize_buf);
735 spin_lock_irq(&cq->lock);
736 cq->resize_buf = NULL;
737 spin_unlock_irq(&cq->lock);
738 }
739 goto out;
740 }
741
742 if (cq->is_kernel) {
743 struct mthca_cq_buf tbuf;
744 int tcqe;
745
746 spin_lock_irq(&cq->lock);
747 if (cq->resize_buf->state == CQ_RESIZE_READY) {
748 mthca_cq_resize_copy_cqes(cq);
749 tbuf = cq->buf;
750 tcqe = cq->ibcq.cqe;
751 cq->buf = cq->resize_buf->buf;
752 cq->ibcq.cqe = cq->resize_buf->cqe;
753 } else {
754 tbuf = cq->resize_buf->buf;
755 tcqe = cq->resize_buf->cqe;
756 }
757
758 kfree(cq->resize_buf);
759 cq->resize_buf = NULL;
760 spin_unlock_irq(&cq->lock);
761
762 mthca_free_cq_buf(dev, &tbuf, tcqe);
763 } else
764 ibcq->cqe = entries - 1;
765
766out:
767 mutex_unlock(&cq->mutex);
768
769 return ret;
770}
771
772static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
773{
774 if (udata) {
775 struct mthca_ucontext *context =
776 rdma_udata_to_drv_context(
777 udata,
778 struct mthca_ucontext,
779 ibucontext);
780
781 mthca_unmap_user_db(to_mdev(cq->device),
782 &context->uar,
783 context->db_tab,
784 to_mcq(cq)->arm_db_index);
785 mthca_unmap_user_db(to_mdev(cq->device),
786 &context->uar,
787 context->db_tab,
788 to_mcq(cq)->set_ci_db_index);
789 }
790 mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
791 return 0;
792}
793
794static inline u32 convert_access(int acc)
795{
796 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) |
797 (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
798 (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) |
799 (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) |
800 MTHCA_MPT_FLAG_LOCAL_READ;
801}
802
803static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
804{
805 struct mthca_mr *mr;
806 int err;
807
808 mr = kmalloc(sizeof *mr, GFP_KERNEL);
809 if (!mr)
810 return ERR_PTR(-ENOMEM);
811
812 err = mthca_mr_alloc_notrans(to_mdev(pd->device),
813 to_mpd(pd)->pd_num,
814 convert_access(acc), mr);
815
816 if (err) {
817 kfree(mr);
818 return ERR_PTR(err);
819 }
820
821 mr->umem = NULL;
822
823 return &mr->ibmr;
824}
825
826static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
827 u64 virt, int acc, struct ib_udata *udata)
828{
829 struct mthca_dev *dev = to_mdev(pd->device);
830 struct ib_block_iter biter;
831 struct mthca_ucontext *context = rdma_udata_to_drv_context(
832 udata, struct mthca_ucontext, ibucontext);
833 struct mthca_mr *mr;
834 struct mthca_reg_mr ucmd;
835 u64 *pages;
836 int n, i;
837 int err = 0;
838 int write_mtt_size;
839
840 if (udata->inlen < sizeof ucmd) {
841 if (!context->reg_mr_warned) {
842 mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n",
843 current->comm);
844 mthca_warn(dev, " Update libmthca to fix this.\n");
845 }
846 ++context->reg_mr_warned;
847 ucmd.mr_attrs = 0;
848 } else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
849 return ERR_PTR(-EFAULT);
850
851 mr = kmalloc(sizeof *mr, GFP_KERNEL);
852 if (!mr)
853 return ERR_PTR(-ENOMEM);
854
855 mr->umem = ib_umem_get(pd->device, start, length, acc);
856 if (IS_ERR(mr->umem)) {
857 err = PTR_ERR(mr->umem);
858 goto err;
859 }
860
861 n = ib_umem_num_dma_blocks(mr->umem, PAGE_SIZE);
862
863 mr->mtt = mthca_alloc_mtt(dev, n);
864 if (IS_ERR(mr->mtt)) {
865 err = PTR_ERR(mr->mtt);
866 goto err_umem;
867 }
868
869 pages = (u64 *) __get_free_page(GFP_KERNEL);
870 if (!pages) {
871 err = -ENOMEM;
872 goto err_mtt;
873 }
874
875 i = n = 0;
876
877 write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));
878
879 rdma_umem_for_each_dma_block(mr->umem, &biter, PAGE_SIZE) {
880 pages[i++] = rdma_block_iter_dma_address(&biter);
881
882 /*
883 * Be friendly to write_mtt and pass it chunks
884 * of appropriate size.
885 */
886 if (i == write_mtt_size) {
887 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
888 if (err)
889 goto mtt_done;
890 n += i;
891 i = 0;
892 }
893 }
894
895 if (i)
896 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
897mtt_done:
898 free_page((unsigned long) pages);
899 if (err)
900 goto err_mtt;
901
902 err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, PAGE_SHIFT, virt, length,
903 convert_access(acc), mr);
904
905 if (err)
906 goto err_mtt;
907
908 return &mr->ibmr;
909
910err_mtt:
911 mthca_free_mtt(dev, mr->mtt);
912
913err_umem:
914 ib_umem_release(mr->umem);
915
916err:
917 kfree(mr);
918 return ERR_PTR(err);
919}
920
921static int mthca_dereg_mr(struct ib_mr *mr, struct ib_udata *udata)
922{
923 struct mthca_mr *mmr = to_mmr(mr);
924
925 mthca_free_mr(to_mdev(mr->device), mmr);
926 ib_umem_release(mmr->umem);
927 kfree(mmr);
928
929 return 0;
930}
931
932static ssize_t hw_rev_show(struct device *device,
933 struct device_attribute *attr, char *buf)
934{
935 struct mthca_dev *dev =
936 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
937
938 return sysfs_emit(buf, "%x\n", dev->rev_id);
939}
940static DEVICE_ATTR_RO(hw_rev);
941
942static const char *hca_type_string(int hca_type)
943{
944 switch (hca_type) {
945 case PCI_DEVICE_ID_MELLANOX_TAVOR:
946 return "MT23108";
947 case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
948 return "MT25208 (MT23108 compat mode)";
949 case PCI_DEVICE_ID_MELLANOX_ARBEL:
950 return "MT25208";
951 case PCI_DEVICE_ID_MELLANOX_SINAI:
952 case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
953 return "MT25204";
954 }
955
956 return "unknown";
957}
958
959static ssize_t hca_type_show(struct device *device,
960 struct device_attribute *attr, char *buf)
961{
962 struct mthca_dev *dev =
963 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
964
965 return sysfs_emit(buf, "%s\n", hca_type_string(dev->pdev->device));
966}
967static DEVICE_ATTR_RO(hca_type);
968
969static ssize_t board_id_show(struct device *device,
970 struct device_attribute *attr, char *buf)
971{
972 struct mthca_dev *dev =
973 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
974
975 return sysfs_emit(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
976}
977static DEVICE_ATTR_RO(board_id);
978
979static struct attribute *mthca_dev_attributes[] = {
980 &dev_attr_hw_rev.attr,
981 &dev_attr_hca_type.attr,
982 &dev_attr_board_id.attr,
983 NULL
984};
985
986static const struct attribute_group mthca_attr_group = {
987 .attrs = mthca_dev_attributes,
988};
989
990static int mthca_init_node_data(struct mthca_dev *dev)
991{
992 struct ib_smp *in_mad;
993 struct ib_smp *out_mad;
994 int err = -ENOMEM;
995
996 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
997 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
998 if (!in_mad || !out_mad)
999 goto out;
1000
1001 ib_init_query_mad(in_mad);
1002 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
1003
1004 err = mthca_MAD_IFC(dev, 1, 1,
1005 1, NULL, NULL, in_mad, out_mad);
1006 if (err)
1007 goto out;
1008
1009 memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX);
1010
1011 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
1012
1013 err = mthca_MAD_IFC(dev, 1, 1,
1014 1, NULL, NULL, in_mad, out_mad);
1015 if (err)
1016 goto out;
1017
1018 if (mthca_is_memfree(dev))
1019 dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
1020 memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
1021
1022out:
1023 kfree(in_mad);
1024 kfree(out_mad);
1025 return err;
1026}
1027
1028static int mthca_port_immutable(struct ib_device *ibdev, u32 port_num,
1029 struct ib_port_immutable *immutable)
1030{
1031 struct ib_port_attr attr;
1032 int err;
1033
1034 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
1035
1036 err = ib_query_port(ibdev, port_num, &attr);
1037 if (err)
1038 return err;
1039
1040 immutable->pkey_tbl_len = attr.pkey_tbl_len;
1041 immutable->gid_tbl_len = attr.gid_tbl_len;
1042 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
1043
1044 return 0;
1045}
1046
1047static void get_dev_fw_str(struct ib_device *device, char *str)
1048{
1049 struct mthca_dev *dev =
1050 container_of(device, struct mthca_dev, ib_dev);
1051 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d",
1052 (int) (dev->fw_ver >> 32),
1053 (int) (dev->fw_ver >> 16) & 0xffff,
1054 (int) dev->fw_ver & 0xffff);
1055}
1056
1057static const struct ib_device_ops mthca_dev_ops = {
1058 .owner = THIS_MODULE,
1059 .driver_id = RDMA_DRIVER_MTHCA,
1060 .uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION,
1061 .uverbs_no_driver_id_binding = 1,
1062
1063 .alloc_pd = mthca_alloc_pd,
1064 .alloc_ucontext = mthca_alloc_ucontext,
1065 .attach_mcast = mthca_multicast_attach,
1066 .create_ah = mthca_ah_create,
1067 .create_cq = mthca_create_cq,
1068 .create_qp = mthca_create_qp,
1069 .dealloc_pd = mthca_dealloc_pd,
1070 .dealloc_ucontext = mthca_dealloc_ucontext,
1071 .dereg_mr = mthca_dereg_mr,
1072 .destroy_ah = mthca_ah_destroy,
1073 .destroy_cq = mthca_destroy_cq,
1074 .destroy_qp = mthca_destroy_qp,
1075 .detach_mcast = mthca_multicast_detach,
1076 .device_group = &mthca_attr_group,
1077 .get_dev_fw_str = get_dev_fw_str,
1078 .get_dma_mr = mthca_get_dma_mr,
1079 .get_port_immutable = mthca_port_immutable,
1080 .mmap = mthca_mmap_uar,
1081 .modify_device = mthca_modify_device,
1082 .modify_port = mthca_modify_port,
1083 .modify_qp = mthca_modify_qp,
1084 .poll_cq = mthca_poll_cq,
1085 .process_mad = mthca_process_mad,
1086 .query_ah = mthca_ah_query,
1087 .query_device = mthca_query_device,
1088 .query_gid = mthca_query_gid,
1089 .query_pkey = mthca_query_pkey,
1090 .query_port = mthca_query_port,
1091 .query_qp = mthca_query_qp,
1092 .reg_user_mr = mthca_reg_user_mr,
1093 .resize_cq = mthca_resize_cq,
1094
1095 INIT_RDMA_OBJ_SIZE(ib_ah, mthca_ah, ibah),
1096 INIT_RDMA_OBJ_SIZE(ib_cq, mthca_cq, ibcq),
1097 INIT_RDMA_OBJ_SIZE(ib_pd, mthca_pd, ibpd),
1098 INIT_RDMA_OBJ_SIZE(ib_qp, mthca_qp, ibqp),
1099 INIT_RDMA_OBJ_SIZE(ib_ucontext, mthca_ucontext, ibucontext),
1100};
1101
1102static const struct ib_device_ops mthca_dev_arbel_srq_ops = {
1103 .create_srq = mthca_create_srq,
1104 .destroy_srq = mthca_destroy_srq,
1105 .modify_srq = mthca_modify_srq,
1106 .post_srq_recv = mthca_arbel_post_srq_recv,
1107 .query_srq = mthca_query_srq,
1108
1109 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),
1110};
1111
1112static const struct ib_device_ops mthca_dev_tavor_srq_ops = {
1113 .create_srq = mthca_create_srq,
1114 .destroy_srq = mthca_destroy_srq,
1115 .modify_srq = mthca_modify_srq,
1116 .post_srq_recv = mthca_tavor_post_srq_recv,
1117 .query_srq = mthca_query_srq,
1118
1119 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),
1120};
1121
1122static const struct ib_device_ops mthca_dev_arbel_ops = {
1123 .post_recv = mthca_arbel_post_receive,
1124 .post_send = mthca_arbel_post_send,
1125 .req_notify_cq = mthca_arbel_arm_cq,
1126};
1127
1128static const struct ib_device_ops mthca_dev_tavor_ops = {
1129 .post_recv = mthca_tavor_post_receive,
1130 .post_send = mthca_tavor_post_send,
1131 .req_notify_cq = mthca_tavor_arm_cq,
1132};
1133
1134int mthca_register_device(struct mthca_dev *dev)
1135{
1136 int ret;
1137
1138 ret = mthca_init_node_data(dev);
1139 if (ret)
1140 return ret;
1141
1142 dev->ib_dev.node_type = RDMA_NODE_IB_CA;
1143 dev->ib_dev.phys_port_cnt = dev->limits.num_ports;
1144 dev->ib_dev.num_comp_vectors = 1;
1145 dev->ib_dev.dev.parent = &dev->pdev->dev;
1146
1147 if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1148 if (mthca_is_memfree(dev))
1149 ib_set_device_ops(&dev->ib_dev,
1150 &mthca_dev_arbel_srq_ops);
1151 else
1152 ib_set_device_ops(&dev->ib_dev,
1153 &mthca_dev_tavor_srq_ops);
1154 }
1155
1156 ib_set_device_ops(&dev->ib_dev, &mthca_dev_ops);
1157
1158 if (mthca_is_memfree(dev))
1159 ib_set_device_ops(&dev->ib_dev, &mthca_dev_arbel_ops);
1160 else
1161 ib_set_device_ops(&dev->ib_dev, &mthca_dev_tavor_ops);
1162
1163 mutex_init(&dev->cap_mask_mutex);
1164
1165 ret = ib_register_device(&dev->ib_dev, "mthca%d", &dev->pdev->dev);
1166 if (ret)
1167 return ret;
1168
1169 mthca_start_catas_poll(dev);
1170
1171 return 0;
1172}
1173
1174void mthca_unregister_device(struct mthca_dev *dev)
1175{
1176 mthca_stop_catas_poll(dev);
1177 ib_unregister_device(&dev->ib_dev);
1178}
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, 2006 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
37#include <rdma/ib_smi.h>
38#include <rdma/ib_umem.h>
39#include <rdma/ib_user_verbs.h>
40
41#include <linux/sched.h>
42#include <linux/slab.h>
43#include <linux/stat.h>
44#include <linux/mm.h>
45#include <linux/export.h>
46
47#include "mthca_dev.h"
48#include "mthca_cmd.h"
49#include "mthca_user.h"
50#include "mthca_memfree.h"
51
52static void init_query_mad(struct ib_smp *mad)
53{
54 mad->base_version = 1;
55 mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
56 mad->class_version = 1;
57 mad->method = IB_MGMT_METHOD_GET;
58}
59
60static int mthca_query_device(struct ib_device *ibdev,
61 struct ib_device_attr *props)
62{
63 struct ib_smp *in_mad = NULL;
64 struct ib_smp *out_mad = NULL;
65 int err = -ENOMEM;
66 struct mthca_dev *mdev = to_mdev(ibdev);
67
68 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
69 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
70 if (!in_mad || !out_mad)
71 goto out;
72
73 memset(props, 0, sizeof *props);
74
75 props->fw_ver = mdev->fw_ver;
76
77 init_query_mad(in_mad);
78 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
79
80 err = mthca_MAD_IFC(mdev, 1, 1,
81 1, NULL, NULL, in_mad, out_mad);
82 if (err)
83 goto out;
84
85 props->device_cap_flags = mdev->device_cap_flags;
86 props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
87 0xffffff;
88 props->vendor_part_id = be16_to_cpup((__be16 *) (out_mad->data + 30));
89 props->hw_ver = be32_to_cpup((__be32 *) (out_mad->data + 32));
90 memcpy(&props->sys_image_guid, out_mad->data + 4, 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_srq_sge;
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 * If Sinai memory key optimization is being used, then only
117 * the 8-bit key portion will change. For other HCAs, the
118 * unused index bits will also be used for FMR remapping.
119 */
120 if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
121 props->max_map_per_fmr = 255;
122 else
123 props->max_map_per_fmr =
124 (1 << (32 - ilog2(mdev->limits.num_mpts))) - 1;
125
126 err = 0;
127 out:
128 kfree(in_mad);
129 kfree(out_mad);
130 return err;
131}
132
133static int mthca_query_port(struct ib_device *ibdev,
134 u8 port, struct ib_port_attr *props)
135{
136 struct ib_smp *in_mad = NULL;
137 struct ib_smp *out_mad = NULL;
138 int err = -ENOMEM;
139
140 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
141 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
142 if (!in_mad || !out_mad)
143 goto out;
144
145 memset(props, 0, sizeof *props);
146
147 init_query_mad(in_mad);
148 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
149 in_mad->attr_mod = cpu_to_be32(port);
150
151 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
152 port, NULL, NULL, in_mad, out_mad);
153 if (err)
154 goto out;
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 props->max_vl_num = out_mad->data[37] >> 4;
174 props->init_type_reply = out_mad->data[41] >> 4;
175
176 out:
177 kfree(in_mad);
178 kfree(out_mad);
179 return err;
180}
181
182static int mthca_modify_device(struct ib_device *ibdev,
183 int mask,
184 struct ib_device_modify *props)
185{
186 if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
187 return -EOPNOTSUPP;
188
189 if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
190 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
191 return -ERESTARTSYS;
192 memcpy(ibdev->node_desc, props->node_desc, 64);
193 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
194 }
195
196 return 0;
197}
198
199static int mthca_modify_port(struct ib_device *ibdev,
200 u8 port, int port_modify_mask,
201 struct ib_port_modify *props)
202{
203 struct mthca_set_ib_param set_ib;
204 struct ib_port_attr attr;
205 int err;
206
207 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
208 return -ERESTARTSYS;
209
210 err = mthca_query_port(ibdev, port, &attr);
211 if (err)
212 goto out;
213
214 set_ib.set_si_guid = 0;
215 set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
216
217 set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
218 ~props->clr_port_cap_mask;
219
220 err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port);
221 if (err)
222 goto out;
223out:
224 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
225 return err;
226}
227
228static int mthca_query_pkey(struct ib_device *ibdev,
229 u8 port, u16 index, u16 *pkey)
230{
231 struct ib_smp *in_mad = NULL;
232 struct ib_smp *out_mad = NULL;
233 int err = -ENOMEM;
234
235 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
236 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
237 if (!in_mad || !out_mad)
238 goto out;
239
240 init_query_mad(in_mad);
241 in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE;
242 in_mad->attr_mod = cpu_to_be32(index / 32);
243
244 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
245 port, NULL, NULL, in_mad, out_mad);
246 if (err)
247 goto out;
248
249 *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
250
251 out:
252 kfree(in_mad);
253 kfree(out_mad);
254 return err;
255}
256
257static int mthca_query_gid(struct ib_device *ibdev, u8 port,
258 int index, union ib_gid *gid)
259{
260 struct ib_smp *in_mad = NULL;
261 struct ib_smp *out_mad = NULL;
262 int err = -ENOMEM;
263
264 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
265 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
266 if (!in_mad || !out_mad)
267 goto out;
268
269 init_query_mad(in_mad);
270 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
271 in_mad->attr_mod = cpu_to_be32(port);
272
273 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
274 port, NULL, NULL, in_mad, out_mad);
275 if (err)
276 goto out;
277
278 memcpy(gid->raw, out_mad->data + 8, 8);
279
280 init_query_mad(in_mad);
281 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
282 in_mad->attr_mod = cpu_to_be32(index / 8);
283
284 err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
285 port, NULL, NULL, in_mad, out_mad);
286 if (err)
287 goto out;
288
289 memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
290
291 out:
292 kfree(in_mad);
293 kfree(out_mad);
294 return err;
295}
296
297static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,
298 struct ib_udata *udata)
299{
300 struct mthca_alloc_ucontext_resp uresp;
301 struct mthca_ucontext *context;
302 int err;
303
304 if (!(to_mdev(ibdev)->active))
305 return ERR_PTR(-EAGAIN);
306
307 memset(&uresp, 0, sizeof uresp);
308
309 uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
310 if (mthca_is_memfree(to_mdev(ibdev)))
311 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
312 else
313 uresp.uarc_size = 0;
314
315 context = kmalloc(sizeof *context, GFP_KERNEL);
316 if (!context)
317 return ERR_PTR(-ENOMEM);
318
319 err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
320 if (err) {
321 kfree(context);
322 return ERR_PTR(err);
323 }
324
325 context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
326 if (IS_ERR(context->db_tab)) {
327 err = PTR_ERR(context->db_tab);
328 mthca_uar_free(to_mdev(ibdev), &context->uar);
329 kfree(context);
330 return ERR_PTR(err);
331 }
332
333 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
334 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
335 mthca_uar_free(to_mdev(ibdev), &context->uar);
336 kfree(context);
337 return ERR_PTR(-EFAULT);
338 }
339
340 context->reg_mr_warned = 0;
341
342 return &context->ibucontext;
343}
344
345static int mthca_dealloc_ucontext(struct ib_ucontext *context)
346{
347 mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
348 to_mucontext(context)->db_tab);
349 mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
350 kfree(to_mucontext(context));
351
352 return 0;
353}
354
355static int mthca_mmap_uar(struct ib_ucontext *context,
356 struct vm_area_struct *vma)
357{
358 if (vma->vm_end - vma->vm_start != PAGE_SIZE)
359 return -EINVAL;
360
361 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
362
363 if (io_remap_pfn_range(vma, vma->vm_start,
364 to_mucontext(context)->uar.pfn,
365 PAGE_SIZE, vma->vm_page_prot))
366 return -EAGAIN;
367
368 return 0;
369}
370
371static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
372 struct ib_ucontext *context,
373 struct ib_udata *udata)
374{
375 struct mthca_pd *pd;
376 int err;
377
378 pd = kmalloc(sizeof *pd, GFP_KERNEL);
379 if (!pd)
380 return ERR_PTR(-ENOMEM);
381
382 err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
383 if (err) {
384 kfree(pd);
385 return ERR_PTR(err);
386 }
387
388 if (context) {
389 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
390 mthca_pd_free(to_mdev(ibdev), pd);
391 kfree(pd);
392 return ERR_PTR(-EFAULT);
393 }
394 }
395
396 return &pd->ibpd;
397}
398
399static int mthca_dealloc_pd(struct ib_pd *pd)
400{
401 mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
402 kfree(pd);
403
404 return 0;
405}
406
407static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
408 struct ib_ah_attr *ah_attr)
409{
410 int err;
411 struct mthca_ah *ah;
412
413 ah = kmalloc(sizeof *ah, GFP_ATOMIC);
414 if (!ah)
415 return ERR_PTR(-ENOMEM);
416
417 err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
418 if (err) {
419 kfree(ah);
420 return ERR_PTR(err);
421 }
422
423 return &ah->ibah;
424}
425
426static int mthca_ah_destroy(struct ib_ah *ah)
427{
428 mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
429 kfree(ah);
430
431 return 0;
432}
433
434static struct ib_srq *mthca_create_srq(struct ib_pd *pd,
435 struct ib_srq_init_attr *init_attr,
436 struct ib_udata *udata)
437{
438 struct mthca_create_srq ucmd;
439 struct mthca_ucontext *context = NULL;
440 struct mthca_srq *srq;
441 int err;
442
443 if (init_attr->srq_type != IB_SRQT_BASIC)
444 return ERR_PTR(-ENOSYS);
445
446 srq = kmalloc(sizeof *srq, GFP_KERNEL);
447 if (!srq)
448 return ERR_PTR(-ENOMEM);
449
450 if (pd->uobject) {
451 context = to_mucontext(pd->uobject->context);
452
453 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
454 err = -EFAULT;
455 goto err_free;
456 }
457
458 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
459 context->db_tab, ucmd.db_index,
460 ucmd.db_page);
461
462 if (err)
463 goto err_free;
464
465 srq->mr.ibmr.lkey = ucmd.lkey;
466 srq->db_index = ucmd.db_index;
467 }
468
469 err = mthca_alloc_srq(to_mdev(pd->device), to_mpd(pd),
470 &init_attr->attr, srq);
471
472 if (err && pd->uobject)
473 mthca_unmap_user_db(to_mdev(pd->device), &context->uar,
474 context->db_tab, ucmd.db_index);
475
476 if (err)
477 goto err_free;
478
479 if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof (__u32))) {
480 mthca_free_srq(to_mdev(pd->device), srq);
481 err = -EFAULT;
482 goto err_free;
483 }
484
485 return &srq->ibsrq;
486
487err_free:
488 kfree(srq);
489
490 return ERR_PTR(err);
491}
492
493static int mthca_destroy_srq(struct ib_srq *srq)
494{
495 struct mthca_ucontext *context;
496
497 if (srq->uobject) {
498 context = to_mucontext(srq->uobject->context);
499
500 mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
501 context->db_tab, to_msrq(srq)->db_index);
502 }
503
504 mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
505 kfree(srq);
506
507 return 0;
508}
509
510static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
511 struct ib_qp_init_attr *init_attr,
512 struct ib_udata *udata)
513{
514 struct mthca_create_qp ucmd;
515 struct mthca_qp *qp;
516 int err;
517
518 if (init_attr->create_flags)
519 return ERR_PTR(-EINVAL);
520
521 switch (init_attr->qp_type) {
522 case IB_QPT_RC:
523 case IB_QPT_UC:
524 case IB_QPT_UD:
525 {
526 struct mthca_ucontext *context;
527
528 qp = kmalloc(sizeof *qp, GFP_KERNEL);
529 if (!qp)
530 return ERR_PTR(-ENOMEM);
531
532 if (pd->uobject) {
533 context = to_mucontext(pd->uobject->context);
534
535 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
536 kfree(qp);
537 return ERR_PTR(-EFAULT);
538 }
539
540 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
541 context->db_tab,
542 ucmd.sq_db_index, ucmd.sq_db_page);
543 if (err) {
544 kfree(qp);
545 return ERR_PTR(err);
546 }
547
548 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
549 context->db_tab,
550 ucmd.rq_db_index, ucmd.rq_db_page);
551 if (err) {
552 mthca_unmap_user_db(to_mdev(pd->device),
553 &context->uar,
554 context->db_tab,
555 ucmd.sq_db_index);
556 kfree(qp);
557 return ERR_PTR(err);
558 }
559
560 qp->mr.ibmr.lkey = ucmd.lkey;
561 qp->sq.db_index = ucmd.sq_db_index;
562 qp->rq.db_index = ucmd.rq_db_index;
563 }
564
565 err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
566 to_mcq(init_attr->send_cq),
567 to_mcq(init_attr->recv_cq),
568 init_attr->qp_type, init_attr->sq_sig_type,
569 &init_attr->cap, qp);
570
571 if (err && pd->uobject) {
572 context = to_mucontext(pd->uobject->context);
573
574 mthca_unmap_user_db(to_mdev(pd->device),
575 &context->uar,
576 context->db_tab,
577 ucmd.sq_db_index);
578 mthca_unmap_user_db(to_mdev(pd->device),
579 &context->uar,
580 context->db_tab,
581 ucmd.rq_db_index);
582 }
583
584 qp->ibqp.qp_num = qp->qpn;
585 break;
586 }
587 case IB_QPT_SMI:
588 case IB_QPT_GSI:
589 {
590 /* Don't allow userspace to create special QPs */
591 if (pd->uobject)
592 return ERR_PTR(-EINVAL);
593
594 qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
595 if (!qp)
596 return ERR_PTR(-ENOMEM);
597
598 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
599
600 err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
601 to_mcq(init_attr->send_cq),
602 to_mcq(init_attr->recv_cq),
603 init_attr->sq_sig_type, &init_attr->cap,
604 qp->ibqp.qp_num, init_attr->port_num,
605 to_msqp(qp));
606 break;
607 }
608 default:
609 /* Don't support raw QPs */
610 return ERR_PTR(-ENOSYS);
611 }
612
613 if (err) {
614 kfree(qp);
615 return ERR_PTR(err);
616 }
617
618 init_attr->cap.max_send_wr = qp->sq.max;
619 init_attr->cap.max_recv_wr = qp->rq.max;
620 init_attr->cap.max_send_sge = qp->sq.max_gs;
621 init_attr->cap.max_recv_sge = qp->rq.max_gs;
622 init_attr->cap.max_inline_data = qp->max_inline_data;
623
624 return &qp->ibqp;
625}
626
627static int mthca_destroy_qp(struct ib_qp *qp)
628{
629 if (qp->uobject) {
630 mthca_unmap_user_db(to_mdev(qp->device),
631 &to_mucontext(qp->uobject->context)->uar,
632 to_mucontext(qp->uobject->context)->db_tab,
633 to_mqp(qp)->sq.db_index);
634 mthca_unmap_user_db(to_mdev(qp->device),
635 &to_mucontext(qp->uobject->context)->uar,
636 to_mucontext(qp->uobject->context)->db_tab,
637 to_mqp(qp)->rq.db_index);
638 }
639 mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
640 kfree(qp);
641 return 0;
642}
643
644static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
645 int comp_vector,
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->buf.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 err = -EFAULT;
699 goto err_free;
700 }
701
702 cq->resize_buf = NULL;
703
704 return &cq->ibcq;
705
706err_free:
707 kfree(cq);
708
709err_unmap_arm:
710 if (context)
711 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
712 to_mucontext(context)->db_tab, ucmd.arm_db_index);
713
714err_unmap_set:
715 if (context)
716 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
717 to_mucontext(context)->db_tab, ucmd.set_db_index);
718
719 return ERR_PTR(err);
720}
721
722static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq,
723 int entries)
724{
725 int ret;
726
727 spin_lock_irq(&cq->lock);
728 if (cq->resize_buf) {
729 ret = -EBUSY;
730 goto unlock;
731 }
732
733 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
734 if (!cq->resize_buf) {
735 ret = -ENOMEM;
736 goto unlock;
737 }
738
739 cq->resize_buf->state = CQ_RESIZE_ALLOC;
740
741 ret = 0;
742
743unlock:
744 spin_unlock_irq(&cq->lock);
745
746 if (ret)
747 return ret;
748
749 ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
750 if (ret) {
751 spin_lock_irq(&cq->lock);
752 kfree(cq->resize_buf);
753 cq->resize_buf = NULL;
754 spin_unlock_irq(&cq->lock);
755 return ret;
756 }
757
758 cq->resize_buf->cqe = entries - 1;
759
760 spin_lock_irq(&cq->lock);
761 cq->resize_buf->state = CQ_RESIZE_READY;
762 spin_unlock_irq(&cq->lock);
763
764 return 0;
765}
766
767static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
768{
769 struct mthca_dev *dev = to_mdev(ibcq->device);
770 struct mthca_cq *cq = to_mcq(ibcq);
771 struct mthca_resize_cq ucmd;
772 u32 lkey;
773 int ret;
774
775 if (entries < 1 || entries > dev->limits.max_cqes)
776 return -EINVAL;
777
778 mutex_lock(&cq->mutex);
779
780 entries = roundup_pow_of_two(entries + 1);
781 if (entries == ibcq->cqe + 1) {
782 ret = 0;
783 goto out;
784 }
785
786 if (cq->is_kernel) {
787 ret = mthca_alloc_resize_buf(dev, cq, entries);
788 if (ret)
789 goto out;
790 lkey = cq->resize_buf->buf.mr.ibmr.lkey;
791 } else {
792 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
793 ret = -EFAULT;
794 goto out;
795 }
796 lkey = ucmd.lkey;
797 }
798
799 ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries));
800
801 if (ret) {
802 if (cq->resize_buf) {
803 mthca_free_cq_buf(dev, &cq->resize_buf->buf,
804 cq->resize_buf->cqe);
805 kfree(cq->resize_buf);
806 spin_lock_irq(&cq->lock);
807 cq->resize_buf = NULL;
808 spin_unlock_irq(&cq->lock);
809 }
810 goto out;
811 }
812
813 if (cq->is_kernel) {
814 struct mthca_cq_buf tbuf;
815 int tcqe;
816
817 spin_lock_irq(&cq->lock);
818 if (cq->resize_buf->state == CQ_RESIZE_READY) {
819 mthca_cq_resize_copy_cqes(cq);
820 tbuf = cq->buf;
821 tcqe = cq->ibcq.cqe;
822 cq->buf = cq->resize_buf->buf;
823 cq->ibcq.cqe = cq->resize_buf->cqe;
824 } else {
825 tbuf = cq->resize_buf->buf;
826 tcqe = cq->resize_buf->cqe;
827 }
828
829 kfree(cq->resize_buf);
830 cq->resize_buf = NULL;
831 spin_unlock_irq(&cq->lock);
832
833 mthca_free_cq_buf(dev, &tbuf, tcqe);
834 } else
835 ibcq->cqe = entries - 1;
836
837out:
838 mutex_unlock(&cq->mutex);
839
840 return ret;
841}
842
843static int mthca_destroy_cq(struct ib_cq *cq)
844{
845 if (cq->uobject) {
846 mthca_unmap_user_db(to_mdev(cq->device),
847 &to_mucontext(cq->uobject->context)->uar,
848 to_mucontext(cq->uobject->context)->db_tab,
849 to_mcq(cq)->arm_db_index);
850 mthca_unmap_user_db(to_mdev(cq->device),
851 &to_mucontext(cq->uobject->context)->uar,
852 to_mucontext(cq->uobject->context)->db_tab,
853 to_mcq(cq)->set_ci_db_index);
854 }
855 mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
856 kfree(cq);
857
858 return 0;
859}
860
861static inline u32 convert_access(int acc)
862{
863 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) |
864 (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
865 (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) |
866 (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) |
867 MTHCA_MPT_FLAG_LOCAL_READ;
868}
869
870static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
871{
872 struct mthca_mr *mr;
873 int err;
874
875 mr = kmalloc(sizeof *mr, GFP_KERNEL);
876 if (!mr)
877 return ERR_PTR(-ENOMEM);
878
879 err = mthca_mr_alloc_notrans(to_mdev(pd->device),
880 to_mpd(pd)->pd_num,
881 convert_access(acc), mr);
882
883 if (err) {
884 kfree(mr);
885 return ERR_PTR(err);
886 }
887
888 mr->umem = NULL;
889
890 return &mr->ibmr;
891}
892
893static struct ib_mr *mthca_reg_phys_mr(struct ib_pd *pd,
894 struct ib_phys_buf *buffer_list,
895 int num_phys_buf,
896 int acc,
897 u64 *iova_start)
898{
899 struct mthca_mr *mr;
900 u64 *page_list;
901 u64 total_size;
902 unsigned long mask;
903 int shift;
904 int npages;
905 int err;
906 int i, j, n;
907
908 mask = buffer_list[0].addr ^ *iova_start;
909 total_size = 0;
910 for (i = 0; i < num_phys_buf; ++i) {
911 if (i != 0)
912 mask |= buffer_list[i].addr;
913 if (i != num_phys_buf - 1)
914 mask |= buffer_list[i].addr + buffer_list[i].size;
915
916 total_size += buffer_list[i].size;
917 }
918
919 if (mask & ~PAGE_MASK)
920 return ERR_PTR(-EINVAL);
921
922 shift = __ffs(mask | 1 << 31);
923
924 buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
925 buffer_list[0].addr &= ~0ull << shift;
926
927 mr = kmalloc(sizeof *mr, GFP_KERNEL);
928 if (!mr)
929 return ERR_PTR(-ENOMEM);
930
931 npages = 0;
932 for (i = 0; i < num_phys_buf; ++i)
933 npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
934
935 if (!npages)
936 return &mr->ibmr;
937
938 page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
939 if (!page_list) {
940 kfree(mr);
941 return ERR_PTR(-ENOMEM);
942 }
943
944 n = 0;
945 for (i = 0; i < num_phys_buf; ++i)
946 for (j = 0;
947 j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
948 ++j)
949 page_list[n++] = buffer_list[i].addr + ((u64) j << shift);
950
951 mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
952 "in PD %x; shift %d, npages %d.\n",
953 (unsigned long long) buffer_list[0].addr,
954 (unsigned long long) *iova_start,
955 to_mpd(pd)->pd_num,
956 shift, npages);
957
958 err = mthca_mr_alloc_phys(to_mdev(pd->device),
959 to_mpd(pd)->pd_num,
960 page_list, shift, npages,
961 *iova_start, total_size,
962 convert_access(acc), mr);
963
964 if (err) {
965 kfree(page_list);
966 kfree(mr);
967 return ERR_PTR(err);
968 }
969
970 kfree(page_list);
971 mr->umem = NULL;
972
973 return &mr->ibmr;
974}
975
976static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
977 u64 virt, int acc, struct ib_udata *udata)
978{
979 struct mthca_dev *dev = to_mdev(pd->device);
980 struct scatterlist *sg;
981 struct mthca_mr *mr;
982 struct mthca_reg_mr ucmd;
983 u64 *pages;
984 int shift, n, len;
985 int i, k, entry;
986 int err = 0;
987 int write_mtt_size;
988
989 if (udata->inlen - sizeof (struct ib_uverbs_cmd_hdr) < sizeof ucmd) {
990 if (!to_mucontext(pd->uobject->context)->reg_mr_warned) {
991 mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n",
992 current->comm);
993 mthca_warn(dev, " Update libmthca to fix this.\n");
994 }
995 ++to_mucontext(pd->uobject->context)->reg_mr_warned;
996 ucmd.mr_attrs = 0;
997 } else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
998 return ERR_PTR(-EFAULT);
999
1000 mr = kmalloc(sizeof *mr, GFP_KERNEL);
1001 if (!mr)
1002 return ERR_PTR(-ENOMEM);
1003
1004 mr->umem = ib_umem_get(pd->uobject->context, start, length, acc,
1005 ucmd.mr_attrs & MTHCA_MR_DMASYNC);
1006
1007 if (IS_ERR(mr->umem)) {
1008 err = PTR_ERR(mr->umem);
1009 goto err;
1010 }
1011
1012 shift = ffs(mr->umem->page_size) - 1;
1013 n = mr->umem->nmap;
1014
1015 mr->mtt = mthca_alloc_mtt(dev, n);
1016 if (IS_ERR(mr->mtt)) {
1017 err = PTR_ERR(mr->mtt);
1018 goto err_umem;
1019 }
1020
1021 pages = (u64 *) __get_free_page(GFP_KERNEL);
1022 if (!pages) {
1023 err = -ENOMEM;
1024 goto err_mtt;
1025 }
1026
1027 i = n = 0;
1028
1029 write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));
1030
1031 for_each_sg(mr->umem->sg_head.sgl, sg, mr->umem->nmap, entry) {
1032 len = sg_dma_len(sg) >> shift;
1033 for (k = 0; k < len; ++k) {
1034 pages[i++] = sg_dma_address(sg) +
1035 mr->umem->page_size * k;
1036 /*
1037 * Be friendly to write_mtt and pass it chunks
1038 * of appropriate size.
1039 */
1040 if (i == write_mtt_size) {
1041 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
1042 if (err)
1043 goto mtt_done;
1044 n += i;
1045 i = 0;
1046 }
1047 }
1048 }
1049
1050 if (i)
1051 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
1052mtt_done:
1053 free_page((unsigned long) pages);
1054 if (err)
1055 goto err_mtt;
1056
1057 err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, virt, length,
1058 convert_access(acc), mr);
1059
1060 if (err)
1061 goto err_mtt;
1062
1063 return &mr->ibmr;
1064
1065err_mtt:
1066 mthca_free_mtt(dev, mr->mtt);
1067
1068err_umem:
1069 ib_umem_release(mr->umem);
1070
1071err:
1072 kfree(mr);
1073 return ERR_PTR(err);
1074}
1075
1076static int mthca_dereg_mr(struct ib_mr *mr)
1077{
1078 struct mthca_mr *mmr = to_mmr(mr);
1079
1080 mthca_free_mr(to_mdev(mr->device), mmr);
1081 if (mmr->umem)
1082 ib_umem_release(mmr->umem);
1083 kfree(mmr);
1084
1085 return 0;
1086}
1087
1088static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
1089 struct ib_fmr_attr *fmr_attr)
1090{
1091 struct mthca_fmr *fmr;
1092 int err;
1093
1094 fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
1095 if (!fmr)
1096 return ERR_PTR(-ENOMEM);
1097
1098 memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
1099 err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
1100 convert_access(mr_access_flags), fmr);
1101
1102 if (err) {
1103 kfree(fmr);
1104 return ERR_PTR(err);
1105 }
1106
1107 return &fmr->ibmr;
1108}
1109
1110static int mthca_dealloc_fmr(struct ib_fmr *fmr)
1111{
1112 struct mthca_fmr *mfmr = to_mfmr(fmr);
1113 int err;
1114
1115 err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
1116 if (err)
1117 return err;
1118
1119 kfree(mfmr);
1120 return 0;
1121}
1122
1123static int mthca_unmap_fmr(struct list_head *fmr_list)
1124{
1125 struct ib_fmr *fmr;
1126 int err;
1127 struct mthca_dev *mdev = NULL;
1128
1129 list_for_each_entry(fmr, fmr_list, list) {
1130 if (mdev && to_mdev(fmr->device) != mdev)
1131 return -EINVAL;
1132 mdev = to_mdev(fmr->device);
1133 }
1134
1135 if (!mdev)
1136 return 0;
1137
1138 if (mthca_is_memfree(mdev)) {
1139 list_for_each_entry(fmr, fmr_list, list)
1140 mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
1141
1142 wmb();
1143 } else
1144 list_for_each_entry(fmr, fmr_list, list)
1145 mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
1146
1147 err = mthca_SYNC_TPT(mdev);
1148 return err;
1149}
1150
1151static ssize_t show_rev(struct device *device, struct device_attribute *attr,
1152 char *buf)
1153{
1154 struct mthca_dev *dev =
1155 container_of(device, struct mthca_dev, ib_dev.dev);
1156 return sprintf(buf, "%x\n", dev->rev_id);
1157}
1158
1159static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
1160 char *buf)
1161{
1162 struct mthca_dev *dev =
1163 container_of(device, struct mthca_dev, ib_dev.dev);
1164 return sprintf(buf, "%d.%d.%d\n", (int) (dev->fw_ver >> 32),
1165 (int) (dev->fw_ver >> 16) & 0xffff,
1166 (int) dev->fw_ver & 0xffff);
1167}
1168
1169static ssize_t show_hca(struct device *device, struct device_attribute *attr,
1170 char *buf)
1171{
1172 struct mthca_dev *dev =
1173 container_of(device, struct mthca_dev, ib_dev.dev);
1174 switch (dev->pdev->device) {
1175 case PCI_DEVICE_ID_MELLANOX_TAVOR:
1176 return sprintf(buf, "MT23108\n");
1177 case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
1178 return sprintf(buf, "MT25208 (MT23108 compat mode)\n");
1179 case PCI_DEVICE_ID_MELLANOX_ARBEL:
1180 return sprintf(buf, "MT25208\n");
1181 case PCI_DEVICE_ID_MELLANOX_SINAI:
1182 case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
1183 return sprintf(buf, "MT25204\n");
1184 default:
1185 return sprintf(buf, "unknown\n");
1186 }
1187}
1188
1189static ssize_t show_board(struct device *device, struct device_attribute *attr,
1190 char *buf)
1191{
1192 struct mthca_dev *dev =
1193 container_of(device, struct mthca_dev, ib_dev.dev);
1194 return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
1195}
1196
1197static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1198static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
1199static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1200static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
1201
1202static struct device_attribute *mthca_dev_attributes[] = {
1203 &dev_attr_hw_rev,
1204 &dev_attr_fw_ver,
1205 &dev_attr_hca_type,
1206 &dev_attr_board_id
1207};
1208
1209static int mthca_init_node_data(struct mthca_dev *dev)
1210{
1211 struct ib_smp *in_mad = NULL;
1212 struct ib_smp *out_mad = NULL;
1213 int err = -ENOMEM;
1214
1215 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
1216 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
1217 if (!in_mad || !out_mad)
1218 goto out;
1219
1220 init_query_mad(in_mad);
1221 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
1222
1223 err = mthca_MAD_IFC(dev, 1, 1,
1224 1, NULL, NULL, in_mad, out_mad);
1225 if (err)
1226 goto out;
1227
1228 memcpy(dev->ib_dev.node_desc, out_mad->data, 64);
1229
1230 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
1231
1232 err = mthca_MAD_IFC(dev, 1, 1,
1233 1, NULL, NULL, in_mad, out_mad);
1234 if (err)
1235 goto out;
1236
1237 if (mthca_is_memfree(dev))
1238 dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
1239 memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
1240
1241out:
1242 kfree(in_mad);
1243 kfree(out_mad);
1244 return err;
1245}
1246
1247int mthca_register_device(struct mthca_dev *dev)
1248{
1249 int ret;
1250 int i;
1251
1252 ret = mthca_init_node_data(dev);
1253 if (ret)
1254 return ret;
1255
1256 strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
1257 dev->ib_dev.owner = THIS_MODULE;
1258
1259 dev->ib_dev.uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION;
1260 dev->ib_dev.uverbs_cmd_mask =
1261 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
1262 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
1263 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
1264 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
1265 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
1266 (1ull << IB_USER_VERBS_CMD_REG_MR) |
1267 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
1268 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1269 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
1270 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
1271 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
1272 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
1273 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
1274 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
1275 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
1276 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
1277 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
1278 dev->ib_dev.node_type = RDMA_NODE_IB_CA;
1279 dev->ib_dev.phys_port_cnt = dev->limits.num_ports;
1280 dev->ib_dev.num_comp_vectors = 1;
1281 dev->ib_dev.dma_device = &dev->pdev->dev;
1282 dev->ib_dev.query_device = mthca_query_device;
1283 dev->ib_dev.query_port = mthca_query_port;
1284 dev->ib_dev.modify_device = mthca_modify_device;
1285 dev->ib_dev.modify_port = mthca_modify_port;
1286 dev->ib_dev.query_pkey = mthca_query_pkey;
1287 dev->ib_dev.query_gid = mthca_query_gid;
1288 dev->ib_dev.alloc_ucontext = mthca_alloc_ucontext;
1289 dev->ib_dev.dealloc_ucontext = mthca_dealloc_ucontext;
1290 dev->ib_dev.mmap = mthca_mmap_uar;
1291 dev->ib_dev.alloc_pd = mthca_alloc_pd;
1292 dev->ib_dev.dealloc_pd = mthca_dealloc_pd;
1293 dev->ib_dev.create_ah = mthca_ah_create;
1294 dev->ib_dev.query_ah = mthca_ah_query;
1295 dev->ib_dev.destroy_ah = mthca_ah_destroy;
1296
1297 if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1298 dev->ib_dev.create_srq = mthca_create_srq;
1299 dev->ib_dev.modify_srq = mthca_modify_srq;
1300 dev->ib_dev.query_srq = mthca_query_srq;
1301 dev->ib_dev.destroy_srq = mthca_destroy_srq;
1302 dev->ib_dev.uverbs_cmd_mask |=
1303 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
1304 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
1305 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
1306 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
1307
1308 if (mthca_is_memfree(dev))
1309 dev->ib_dev.post_srq_recv = mthca_arbel_post_srq_recv;
1310 else
1311 dev->ib_dev.post_srq_recv = mthca_tavor_post_srq_recv;
1312 }
1313
1314 dev->ib_dev.create_qp = mthca_create_qp;
1315 dev->ib_dev.modify_qp = mthca_modify_qp;
1316 dev->ib_dev.query_qp = mthca_query_qp;
1317 dev->ib_dev.destroy_qp = mthca_destroy_qp;
1318 dev->ib_dev.create_cq = mthca_create_cq;
1319 dev->ib_dev.resize_cq = mthca_resize_cq;
1320 dev->ib_dev.destroy_cq = mthca_destroy_cq;
1321 dev->ib_dev.poll_cq = mthca_poll_cq;
1322 dev->ib_dev.get_dma_mr = mthca_get_dma_mr;
1323 dev->ib_dev.reg_phys_mr = mthca_reg_phys_mr;
1324 dev->ib_dev.reg_user_mr = mthca_reg_user_mr;
1325 dev->ib_dev.dereg_mr = mthca_dereg_mr;
1326
1327 if (dev->mthca_flags & MTHCA_FLAG_FMR) {
1328 dev->ib_dev.alloc_fmr = mthca_alloc_fmr;
1329 dev->ib_dev.unmap_fmr = mthca_unmap_fmr;
1330 dev->ib_dev.dealloc_fmr = mthca_dealloc_fmr;
1331 if (mthca_is_memfree(dev))
1332 dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
1333 else
1334 dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
1335 }
1336
1337 dev->ib_dev.attach_mcast = mthca_multicast_attach;
1338 dev->ib_dev.detach_mcast = mthca_multicast_detach;
1339 dev->ib_dev.process_mad = mthca_process_mad;
1340
1341 if (mthca_is_memfree(dev)) {
1342 dev->ib_dev.req_notify_cq = mthca_arbel_arm_cq;
1343 dev->ib_dev.post_send = mthca_arbel_post_send;
1344 dev->ib_dev.post_recv = mthca_arbel_post_receive;
1345 } else {
1346 dev->ib_dev.req_notify_cq = mthca_tavor_arm_cq;
1347 dev->ib_dev.post_send = mthca_tavor_post_send;
1348 dev->ib_dev.post_recv = mthca_tavor_post_receive;
1349 }
1350
1351 mutex_init(&dev->cap_mask_mutex);
1352
1353 ret = ib_register_device(&dev->ib_dev, NULL);
1354 if (ret)
1355 return ret;
1356
1357 for (i = 0; i < ARRAY_SIZE(mthca_dev_attributes); ++i) {
1358 ret = device_create_file(&dev->ib_dev.dev,
1359 mthca_dev_attributes[i]);
1360 if (ret) {
1361 ib_unregister_device(&dev->ib_dev);
1362 return ret;
1363 }
1364 }
1365
1366 mthca_start_catas_poll(dev);
1367
1368 return 0;
1369}
1370
1371void mthca_unregister_device(struct mthca_dev *dev)
1372{
1373 mthca_stop_catas_poll(dev);
1374 ib_unregister_device(&dev->ib_dev);
1375}