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Merge tag 'linux_kselftest-fixes-6.12-rc2' of git://git.kernel.org/pub/scm/linux...
[linux-block.git] / drivers / infiniband / hw / mthca / mthca_provider.c
... / ...
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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 uverbs_attr_bundle *attrs)
578{
579 struct ib_udata *udata = &attrs->driver_udata;
580 struct ib_device *ibdev = ibcq->device;
581 int entries = attr->cqe;
582 struct mthca_create_cq ucmd;
583 struct mthca_cq *cq;
584 int nent;
585 int err;
586 struct mthca_ucontext *context = rdma_udata_to_drv_context(
587 udata, struct mthca_ucontext, ibucontext);
588
589 if (attr->flags)
590 return -EOPNOTSUPP;
591
592 if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
593 return -EINVAL;
594
595 if (udata) {
596 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
597 return -EFAULT;
598
599 err = mthca_map_user_db(to_mdev(ibdev), &context->uar,
600 context->db_tab, ucmd.set_db_index,
601 ucmd.set_db_page);
602 if (err)
603 return err;
604
605 err = mthca_map_user_db(to_mdev(ibdev), &context->uar,
606 context->db_tab, ucmd.arm_db_index,
607 ucmd.arm_db_page);
608 if (err)
609 goto err_unmap_set;
610 }
611
612 cq = to_mcq(ibcq);
613
614 if (udata) {
615 cq->buf.mr.ibmr.lkey = ucmd.lkey;
616 cq->set_ci_db_index = ucmd.set_db_index;
617 cq->arm_db_index = ucmd.arm_db_index;
618 }
619
620 for (nent = 1; nent <= entries; nent <<= 1)
621 ; /* nothing */
622
623 err = mthca_init_cq(to_mdev(ibdev), nent, context,
624 udata ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
625 cq);
626 if (err)
627 goto err_unmap_arm;
628
629 if (udata && ib_copy_to_udata(udata, &cq->cqn, sizeof(__u32))) {
630 mthca_free_cq(to_mdev(ibdev), cq);
631 err = -EFAULT;
632 goto err_unmap_arm;
633 }
634
635 cq->resize_buf = NULL;
636
637 return 0;
638
639err_unmap_arm:
640 if (udata)
641 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
642 context->db_tab, ucmd.arm_db_index);
643
644err_unmap_set:
645 if (udata)
646 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
647 context->db_tab, ucmd.set_db_index);
648
649 return err;
650}
651
652static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq,
653 int entries)
654{
655 int ret;
656
657 spin_lock_irq(&cq->lock);
658 if (cq->resize_buf) {
659 ret = -EBUSY;
660 goto unlock;
661 }
662
663 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
664 if (!cq->resize_buf) {
665 ret = -ENOMEM;
666 goto unlock;
667 }
668
669 cq->resize_buf->state = CQ_RESIZE_ALLOC;
670
671 ret = 0;
672
673unlock:
674 spin_unlock_irq(&cq->lock);
675
676 if (ret)
677 return ret;
678
679 ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
680 if (ret) {
681 spin_lock_irq(&cq->lock);
682 kfree(cq->resize_buf);
683 cq->resize_buf = NULL;
684 spin_unlock_irq(&cq->lock);
685 return ret;
686 }
687
688 cq->resize_buf->cqe = entries - 1;
689
690 spin_lock_irq(&cq->lock);
691 cq->resize_buf->state = CQ_RESIZE_READY;
692 spin_unlock_irq(&cq->lock);
693
694 return 0;
695}
696
697static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
698{
699 struct mthca_dev *dev = to_mdev(ibcq->device);
700 struct mthca_cq *cq = to_mcq(ibcq);
701 struct mthca_resize_cq ucmd;
702 u32 lkey;
703 int ret;
704
705 if (entries < 1 || entries > dev->limits.max_cqes)
706 return -EINVAL;
707
708 mutex_lock(&cq->mutex);
709
710 entries = roundup_pow_of_two(entries + 1);
711 if (entries == ibcq->cqe + 1) {
712 ret = 0;
713 goto out;
714 }
715
716 if (cq->is_kernel) {
717 ret = mthca_alloc_resize_buf(dev, cq, entries);
718 if (ret)
719 goto out;
720 lkey = cq->resize_buf->buf.mr.ibmr.lkey;
721 } else {
722 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
723 ret = -EFAULT;
724 goto out;
725 }
726 lkey = ucmd.lkey;
727 }
728
729 ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries));
730
731 if (ret) {
732 if (cq->resize_buf) {
733 mthca_free_cq_buf(dev, &cq->resize_buf->buf,
734 cq->resize_buf->cqe);
735 kfree(cq->resize_buf);
736 spin_lock_irq(&cq->lock);
737 cq->resize_buf = NULL;
738 spin_unlock_irq(&cq->lock);
739 }
740 goto out;
741 }
742
743 if (cq->is_kernel) {
744 struct mthca_cq_buf tbuf;
745 int tcqe;
746
747 spin_lock_irq(&cq->lock);
748 if (cq->resize_buf->state == CQ_RESIZE_READY) {
749 mthca_cq_resize_copy_cqes(cq);
750 tbuf = cq->buf;
751 tcqe = cq->ibcq.cqe;
752 cq->buf = cq->resize_buf->buf;
753 cq->ibcq.cqe = cq->resize_buf->cqe;
754 } else {
755 tbuf = cq->resize_buf->buf;
756 tcqe = cq->resize_buf->cqe;
757 }
758
759 kfree(cq->resize_buf);
760 cq->resize_buf = NULL;
761 spin_unlock_irq(&cq->lock);
762
763 mthca_free_cq_buf(dev, &tbuf, tcqe);
764 } else
765 ibcq->cqe = entries - 1;
766
767out:
768 mutex_unlock(&cq->mutex);
769
770 return ret;
771}
772
773static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
774{
775 if (udata) {
776 struct mthca_ucontext *context =
777 rdma_udata_to_drv_context(
778 udata,
779 struct mthca_ucontext,
780 ibucontext);
781
782 mthca_unmap_user_db(to_mdev(cq->device),
783 &context->uar,
784 context->db_tab,
785 to_mcq(cq)->arm_db_index);
786 mthca_unmap_user_db(to_mdev(cq->device),
787 &context->uar,
788 context->db_tab,
789 to_mcq(cq)->set_ci_db_index);
790 }
791 mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
792 return 0;
793}
794
795static inline u32 convert_access(int acc)
796{
797 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) |
798 (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
799 (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) |
800 (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) |
801 MTHCA_MPT_FLAG_LOCAL_READ;
802}
803
804static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
805{
806 struct mthca_mr *mr;
807 int err;
808
809 mr = kmalloc(sizeof *mr, GFP_KERNEL);
810 if (!mr)
811 return ERR_PTR(-ENOMEM);
812
813 err = mthca_mr_alloc_notrans(to_mdev(pd->device),
814 to_mpd(pd)->pd_num,
815 convert_access(acc), mr);
816
817 if (err) {
818 kfree(mr);
819 return ERR_PTR(err);
820 }
821
822 mr->umem = NULL;
823
824 return &mr->ibmr;
825}
826
827static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
828 u64 virt, int acc, struct ib_udata *udata)
829{
830 struct mthca_dev *dev = to_mdev(pd->device);
831 struct ib_block_iter biter;
832 struct mthca_ucontext *context = rdma_udata_to_drv_context(
833 udata, struct mthca_ucontext, ibucontext);
834 struct mthca_mr *mr;
835 struct mthca_reg_mr ucmd;
836 u64 *pages;
837 int n, i;
838 int err = 0;
839 int write_mtt_size;
840
841 if (udata->inlen < sizeof ucmd) {
842 if (!context->reg_mr_warned) {
843 mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n",
844 current->comm);
845 mthca_warn(dev, " Update libmthca to fix this.\n");
846 }
847 ++context->reg_mr_warned;
848 ucmd.mr_attrs = 0;
849 } else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
850 return ERR_PTR(-EFAULT);
851
852 mr = kmalloc(sizeof *mr, GFP_KERNEL);
853 if (!mr)
854 return ERR_PTR(-ENOMEM);
855
856 mr->umem = ib_umem_get(pd->device, start, length, acc);
857 if (IS_ERR(mr->umem)) {
858 err = PTR_ERR(mr->umem);
859 goto err;
860 }
861
862 n = ib_umem_num_dma_blocks(mr->umem, PAGE_SIZE);
863
864 mr->mtt = mthca_alloc_mtt(dev, n);
865 if (IS_ERR(mr->mtt)) {
866 err = PTR_ERR(mr->mtt);
867 goto err_umem;
868 }
869
870 pages = (u64 *) __get_free_page(GFP_KERNEL);
871 if (!pages) {
872 err = -ENOMEM;
873 goto err_mtt;
874 }
875
876 i = n = 0;
877
878 write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));
879
880 rdma_umem_for_each_dma_block(mr->umem, &biter, PAGE_SIZE) {
881 pages[i++] = rdma_block_iter_dma_address(&biter);
882
883 /*
884 * Be friendly to write_mtt and pass it chunks
885 * of appropriate size.
886 */
887 if (i == write_mtt_size) {
888 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
889 if (err)
890 goto mtt_done;
891 n += i;
892 i = 0;
893 }
894 }
895
896 if (i)
897 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
898mtt_done:
899 free_page((unsigned long) pages);
900 if (err)
901 goto err_mtt;
902
903 err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, PAGE_SHIFT, virt, length,
904 convert_access(acc), mr);
905
906 if (err)
907 goto err_mtt;
908
909 return &mr->ibmr;
910
911err_mtt:
912 mthca_free_mtt(dev, mr->mtt);
913
914err_umem:
915 ib_umem_release(mr->umem);
916
917err:
918 kfree(mr);
919 return ERR_PTR(err);
920}
921
922static int mthca_dereg_mr(struct ib_mr *mr, struct ib_udata *udata)
923{
924 struct mthca_mr *mmr = to_mmr(mr);
925
926 mthca_free_mr(to_mdev(mr->device), mmr);
927 ib_umem_release(mmr->umem);
928 kfree(mmr);
929
930 return 0;
931}
932
933static ssize_t hw_rev_show(struct device *device,
934 struct device_attribute *attr, char *buf)
935{
936 struct mthca_dev *dev =
937 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
938
939 return sysfs_emit(buf, "%x\n", dev->rev_id);
940}
941static DEVICE_ATTR_RO(hw_rev);
942
943static const char *hca_type_string(int hca_type)
944{
945 switch (hca_type) {
946 case PCI_DEVICE_ID_MELLANOX_TAVOR:
947 return "MT23108";
948 case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
949 return "MT25208 (MT23108 compat mode)";
950 case PCI_DEVICE_ID_MELLANOX_ARBEL:
951 return "MT25208";
952 case PCI_DEVICE_ID_MELLANOX_SINAI:
953 case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
954 return "MT25204";
955 }
956
957 return "unknown";
958}
959
960static ssize_t hca_type_show(struct device *device,
961 struct device_attribute *attr, char *buf)
962{
963 struct mthca_dev *dev =
964 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
965
966 return sysfs_emit(buf, "%s\n", hca_type_string(dev->pdev->device));
967}
968static DEVICE_ATTR_RO(hca_type);
969
970static ssize_t board_id_show(struct device *device,
971 struct device_attribute *attr, char *buf)
972{
973 struct mthca_dev *dev =
974 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
975
976 return sysfs_emit(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
977}
978static DEVICE_ATTR_RO(board_id);
979
980static struct attribute *mthca_dev_attributes[] = {
981 &dev_attr_hw_rev.attr,
982 &dev_attr_hca_type.attr,
983 &dev_attr_board_id.attr,
984 NULL
985};
986
987static const struct attribute_group mthca_attr_group = {
988 .attrs = mthca_dev_attributes,
989};
990
991static int mthca_init_node_data(struct mthca_dev *dev)
992{
993 struct ib_smp *in_mad;
994 struct ib_smp *out_mad;
995 int err = -ENOMEM;
996
997 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
998 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
999 if (!in_mad || !out_mad)
1000 goto out;
1001
1002 ib_init_query_mad(in_mad);
1003 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
1004
1005 err = mthca_MAD_IFC(dev, 1, 1,
1006 1, NULL, NULL, in_mad, out_mad);
1007 if (err)
1008 goto out;
1009
1010 memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX);
1011
1012 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
1013
1014 err = mthca_MAD_IFC(dev, 1, 1,
1015 1, NULL, NULL, in_mad, out_mad);
1016 if (err)
1017 goto out;
1018
1019 if (mthca_is_memfree(dev))
1020 dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
1021 memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
1022
1023out:
1024 kfree(in_mad);
1025 kfree(out_mad);
1026 return err;
1027}
1028
1029static int mthca_port_immutable(struct ib_device *ibdev, u32 port_num,
1030 struct ib_port_immutable *immutable)
1031{
1032 struct ib_port_attr attr;
1033 int err;
1034
1035 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
1036
1037 err = ib_query_port(ibdev, port_num, &attr);
1038 if (err)
1039 return err;
1040
1041 immutable->pkey_tbl_len = attr.pkey_tbl_len;
1042 immutable->gid_tbl_len = attr.gid_tbl_len;
1043 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
1044
1045 return 0;
1046}
1047
1048static void get_dev_fw_str(struct ib_device *device, char *str)
1049{
1050 struct mthca_dev *dev =
1051 container_of(device, struct mthca_dev, ib_dev);
1052 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d",
1053 (int) (dev->fw_ver >> 32),
1054 (int) (dev->fw_ver >> 16) & 0xffff,
1055 (int) dev->fw_ver & 0xffff);
1056}
1057
1058static const struct ib_device_ops mthca_dev_ops = {
1059 .owner = THIS_MODULE,
1060 .driver_id = RDMA_DRIVER_MTHCA,
1061 .uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION,
1062 .uverbs_no_driver_id_binding = 1,
1063
1064 .alloc_pd = mthca_alloc_pd,
1065 .alloc_ucontext = mthca_alloc_ucontext,
1066 .attach_mcast = mthca_multicast_attach,
1067 .create_ah = mthca_ah_create,
1068 .create_cq = mthca_create_cq,
1069 .create_qp = mthca_create_qp,
1070 .dealloc_pd = mthca_dealloc_pd,
1071 .dealloc_ucontext = mthca_dealloc_ucontext,
1072 .dereg_mr = mthca_dereg_mr,
1073 .destroy_ah = mthca_ah_destroy,
1074 .destroy_cq = mthca_destroy_cq,
1075 .destroy_qp = mthca_destroy_qp,
1076 .detach_mcast = mthca_multicast_detach,
1077 .device_group = &mthca_attr_group,
1078 .get_dev_fw_str = get_dev_fw_str,
1079 .get_dma_mr = mthca_get_dma_mr,
1080 .get_port_immutable = mthca_port_immutable,
1081 .mmap = mthca_mmap_uar,
1082 .modify_device = mthca_modify_device,
1083 .modify_port = mthca_modify_port,
1084 .modify_qp = mthca_modify_qp,
1085 .poll_cq = mthca_poll_cq,
1086 .process_mad = mthca_process_mad,
1087 .query_ah = mthca_ah_query,
1088 .query_device = mthca_query_device,
1089 .query_gid = mthca_query_gid,
1090 .query_pkey = mthca_query_pkey,
1091 .query_port = mthca_query_port,
1092 .query_qp = mthca_query_qp,
1093 .reg_user_mr = mthca_reg_user_mr,
1094 .resize_cq = mthca_resize_cq,
1095
1096 INIT_RDMA_OBJ_SIZE(ib_ah, mthca_ah, ibah),
1097 INIT_RDMA_OBJ_SIZE(ib_cq, mthca_cq, ibcq),
1098 INIT_RDMA_OBJ_SIZE(ib_pd, mthca_pd, ibpd),
1099 INIT_RDMA_OBJ_SIZE(ib_qp, mthca_qp, ibqp),
1100 INIT_RDMA_OBJ_SIZE(ib_ucontext, mthca_ucontext, ibucontext),
1101};
1102
1103static const struct ib_device_ops mthca_dev_arbel_srq_ops = {
1104 .create_srq = mthca_create_srq,
1105 .destroy_srq = mthca_destroy_srq,
1106 .modify_srq = mthca_modify_srq,
1107 .post_srq_recv = mthca_arbel_post_srq_recv,
1108 .query_srq = mthca_query_srq,
1109
1110 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),
1111};
1112
1113static const struct ib_device_ops mthca_dev_tavor_srq_ops = {
1114 .create_srq = mthca_create_srq,
1115 .destroy_srq = mthca_destroy_srq,
1116 .modify_srq = mthca_modify_srq,
1117 .post_srq_recv = mthca_tavor_post_srq_recv,
1118 .query_srq = mthca_query_srq,
1119
1120 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),
1121};
1122
1123static const struct ib_device_ops mthca_dev_arbel_ops = {
1124 .post_recv = mthca_arbel_post_receive,
1125 .post_send = mthca_arbel_post_send,
1126 .req_notify_cq = mthca_arbel_arm_cq,
1127};
1128
1129static const struct ib_device_ops mthca_dev_tavor_ops = {
1130 .post_recv = mthca_tavor_post_receive,
1131 .post_send = mthca_tavor_post_send,
1132 .req_notify_cq = mthca_tavor_arm_cq,
1133};
1134
1135int mthca_register_device(struct mthca_dev *dev)
1136{
1137 int ret;
1138
1139 ret = mthca_init_node_data(dev);
1140 if (ret)
1141 return ret;
1142
1143 dev->ib_dev.node_type = RDMA_NODE_IB_CA;
1144 dev->ib_dev.phys_port_cnt = dev->limits.num_ports;
1145 dev->ib_dev.num_comp_vectors = 1;
1146 dev->ib_dev.dev.parent = &dev->pdev->dev;
1147
1148 if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1149 if (mthca_is_memfree(dev))
1150 ib_set_device_ops(&dev->ib_dev,
1151 &mthca_dev_arbel_srq_ops);
1152 else
1153 ib_set_device_ops(&dev->ib_dev,
1154 &mthca_dev_tavor_srq_ops);
1155 }
1156
1157 ib_set_device_ops(&dev->ib_dev, &mthca_dev_ops);
1158
1159 if (mthca_is_memfree(dev))
1160 ib_set_device_ops(&dev->ib_dev, &mthca_dev_arbel_ops);
1161 else
1162 ib_set_device_ops(&dev->ib_dev, &mthca_dev_tavor_ops);
1163
1164 mutex_init(&dev->cap_mask_mutex);
1165
1166 ret = ib_register_device(&dev->ib_dev, "mthca%d", &dev->pdev->dev);
1167 if (ret)
1168 return ret;
1169
1170 mthca_start_catas_poll(dev);
1171
1172 return 0;
1173}
1174
1175void mthca_unregister_device(struct mthca_dev *dev)
1176{
1177 mthca_stop_catas_poll(dev);
1178 ib_unregister_device(&dev->ib_dev);
1179}
Linux 6.x block layer and io_uring tree(s)