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
mthca_query_device(struct ib_device * ibdev,struct ib_device_attr * props,struct ib_udata * uhw)53 static 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_obj(*in_mad);
65 out_mad = kmalloc_obj(*out_mad);
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
mthca_query_port(struct ib_device * ibdev,u32 port,struct ib_port_attr * props)121 static 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_obj(*in_mad);
129 out_mad = kmalloc_obj(*out_mad);
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
mthca_modify_device(struct ib_device * ibdev,int mask,struct ib_device_modify * props)170 static 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
mthca_modify_port(struct ib_device * ibdev,u32 port,int port_modify_mask,struct ib_port_modify * props)188 static 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;
212 out:
213 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
214 return err;
215 }
216
mthca_query_pkey(struct ib_device * ibdev,u32 port,u16 index,u16 * pkey)217 static 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_obj(*in_mad);
225 out_mad = kmalloc_obj(*out_mad);
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
mthca_query_gid(struct ib_device * ibdev,u32 port,int index,union ib_gid * gid)246 static 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_obj(*in_mad);
254 out_mad = kmalloc_obj(*out_mad);
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
mthca_alloc_ucontext(struct ib_ucontext * uctx,struct ib_udata * udata)286 static 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
mthca_dealloc_ucontext(struct ib_ucontext * context)325 static 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
mthca_mmap_uar(struct ib_ucontext * context,struct vm_area_struct * vma)332 static 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
mthca_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)348 static 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
mthca_dealloc_pd(struct ib_pd * pd,struct ib_udata * udata)368 static 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
mthca_ah_create(struct ib_ah * ibah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)374 static 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
mthca_ah_destroy(struct ib_ah * ah,u32 flags)385 static 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
mthca_create_srq(struct ib_srq * ibsrq,struct ib_srq_init_attr * init_attr,struct ib_udata * udata)391 static 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 mthca_unmap_user_db(to_mdev(ibsrq->device), &context->uar,
432 context->db_tab, ucmd.db_index);
433 return -EFAULT;
434 }
435
436 return 0;
437 }
438
mthca_destroy_srq(struct ib_srq * srq,struct ib_udata * udata)439 static int mthca_destroy_srq(struct ib_srq *srq, struct ib_udata *udata)
440 {
441 mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
442 if (udata) {
443 struct mthca_ucontext *context =
444 rdma_udata_to_drv_context(
445 udata,
446 struct mthca_ucontext,
447 ibucontext);
448
449 mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
450 context->db_tab, to_msrq(srq)->db_index);
451 }
452 return 0;
453 }
454
mthca_create_qp(struct ib_qp * ibqp,struct ib_qp_init_attr * init_attr,struct ib_udata * udata)455 static int mthca_create_qp(struct ib_qp *ibqp,
456 struct ib_qp_init_attr *init_attr,
457 struct ib_udata *udata)
458 {
459 struct mthca_ucontext *context = rdma_udata_to_drv_context(
460 udata, struct mthca_ucontext, ibucontext);
461 struct mthca_create_qp ucmd;
462 struct mthca_qp *qp = to_mqp(ibqp);
463 struct mthca_dev *dev = to_mdev(ibqp->device);
464 int err;
465
466 if (init_attr->create_flags)
467 return -EOPNOTSUPP;
468
469 switch (init_attr->qp_type) {
470 case IB_QPT_RC:
471 case IB_QPT_UC:
472 case IB_QPT_UD:
473 {
474 if (udata) {
475 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
476 return -EFAULT;
477
478 err = mthca_map_user_db(dev, &context->uar,
479 context->db_tab,
480 ucmd.sq_db_index,
481 ucmd.sq_db_page);
482 if (err)
483 return err;
484
485 err = mthca_map_user_db(dev, &context->uar,
486 context->db_tab,
487 ucmd.rq_db_index,
488 ucmd.rq_db_page);
489 if (err) {
490 mthca_unmap_user_db(dev, &context->uar,
491 context->db_tab,
492 ucmd.sq_db_index);
493 return err;
494 }
495
496 qp->mr.ibmr.lkey = ucmd.lkey;
497 qp->sq.db_index = ucmd.sq_db_index;
498 qp->rq.db_index = ucmd.rq_db_index;
499 }
500
501 err = mthca_alloc_qp(dev, to_mpd(ibqp->pd),
502 to_mcq(init_attr->send_cq),
503 to_mcq(init_attr->recv_cq),
504 init_attr->qp_type, init_attr->sq_sig_type,
505 &init_attr->cap, qp, udata);
506
507 if (err && udata) {
508 mthca_unmap_user_db(dev, &context->uar, context->db_tab,
509 ucmd.sq_db_index);
510 mthca_unmap_user_db(dev, &context->uar, context->db_tab,
511 ucmd.rq_db_index);
512 }
513
514 qp->ibqp.qp_num = qp->qpn;
515 break;
516 }
517 case IB_QPT_SMI:
518 case IB_QPT_GSI:
519 {
520 qp->sqp = kzalloc_obj(struct mthca_sqp);
521 if (!qp->sqp)
522 return -ENOMEM;
523
524 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
525
526 err = mthca_alloc_sqp(dev, to_mpd(ibqp->pd),
527 to_mcq(init_attr->send_cq),
528 to_mcq(init_attr->recv_cq),
529 init_attr->sq_sig_type, &init_attr->cap,
530 qp->ibqp.qp_num, init_attr->port_num, qp,
531 udata);
532 break;
533 }
534 default:
535 /* Don't support raw QPs */
536 return -EOPNOTSUPP;
537 }
538
539 if (err) {
540 kfree(qp->sqp);
541 return err;
542 }
543
544 init_attr->cap.max_send_wr = qp->sq.max;
545 init_attr->cap.max_recv_wr = qp->rq.max;
546 init_attr->cap.max_send_sge = qp->sq.max_gs;
547 init_attr->cap.max_recv_sge = qp->rq.max_gs;
548 init_attr->cap.max_inline_data = qp->max_inline_data;
549
550 return 0;
551 }
552
mthca_destroy_qp(struct ib_qp * qp,struct ib_udata * udata)553 static int mthca_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
554 {
555 if (udata) {
556 struct mthca_ucontext *context =
557 rdma_udata_to_drv_context(
558 udata,
559 struct mthca_ucontext,
560 ibucontext);
561
562 mthca_unmap_user_db(to_mdev(qp->device),
563 &context->uar,
564 context->db_tab,
565 to_mqp(qp)->sq.db_index);
566 mthca_unmap_user_db(to_mdev(qp->device),
567 &context->uar,
568 context->db_tab,
569 to_mqp(qp)->rq.db_index);
570 }
571 mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
572 kfree(to_mqp(qp)->sqp);
573 return 0;
574 }
575
mthca_create_cq(struct ib_cq * ibcq,const struct ib_cq_init_attr * attr,struct uverbs_attr_bundle * attrs)576 static int mthca_create_cq(struct ib_cq *ibcq,
577 const struct ib_cq_init_attr *attr,
578 struct uverbs_attr_bundle *attrs)
579 {
580 struct ib_udata *udata = &attrs->driver_udata;
581 struct ib_device *ibdev = ibcq->device;
582 int entries = attr->cqe;
583 struct mthca_create_cq ucmd;
584 struct mthca_cq *cq;
585 int nent;
586 int err;
587 struct mthca_ucontext *context = rdma_udata_to_drv_context(
588 udata, struct mthca_ucontext, ibucontext);
589
590 if (attr->flags)
591 return -EOPNOTSUPP;
592
593 if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
594 return -EINVAL;
595
596 if (udata) {
597 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
598 return -EFAULT;
599
600 err = mthca_map_user_db(to_mdev(ibdev), &context->uar,
601 context->db_tab, ucmd.set_db_index,
602 ucmd.set_db_page);
603 if (err)
604 return err;
605
606 err = mthca_map_user_db(to_mdev(ibdev), &context->uar,
607 context->db_tab, ucmd.arm_db_index,
608 ucmd.arm_db_page);
609 if (err)
610 goto err_unmap_set;
611 }
612
613 cq = to_mcq(ibcq);
614
615 if (udata) {
616 cq->buf.mr.ibmr.lkey = ucmd.lkey;
617 cq->set_ci_db_index = ucmd.set_db_index;
618 cq->arm_db_index = ucmd.arm_db_index;
619 }
620
621 for (nent = 1; nent <= entries; nent <<= 1)
622 ; /* nothing */
623
624 err = mthca_init_cq(to_mdev(ibdev), nent, context,
625 udata ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
626 cq);
627 if (err)
628 goto err_unmap_arm;
629
630 if (udata && ib_copy_to_udata(udata, &cq->cqn, sizeof(__u32))) {
631 mthca_free_cq(to_mdev(ibdev), cq);
632 err = -EFAULT;
633 goto err_unmap_arm;
634 }
635
636 cq->resize_buf = NULL;
637
638 return 0;
639
640 err_unmap_arm:
641 if (udata)
642 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
643 context->db_tab, ucmd.arm_db_index);
644
645 err_unmap_set:
646 if (udata)
647 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
648 context->db_tab, ucmd.set_db_index);
649
650 return err;
651 }
652
mthca_alloc_resize_buf(struct mthca_dev * dev,struct mthca_cq * cq,int entries)653 static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq,
654 int entries)
655 {
656 int ret;
657
658 spin_lock_irq(&cq->lock);
659 if (cq->resize_buf) {
660 ret = -EBUSY;
661 goto unlock;
662 }
663
664 cq->resize_buf = kmalloc_obj(*cq->resize_buf, GFP_ATOMIC);
665 if (!cq->resize_buf) {
666 ret = -ENOMEM;
667 goto unlock;
668 }
669
670 cq->resize_buf->state = CQ_RESIZE_ALLOC;
671
672 ret = 0;
673
674 unlock:
675 spin_unlock_irq(&cq->lock);
676
677 if (ret)
678 return ret;
679
680 ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
681 if (ret) {
682 spin_lock_irq(&cq->lock);
683 kfree(cq->resize_buf);
684 cq->resize_buf = NULL;
685 spin_unlock_irq(&cq->lock);
686 return ret;
687 }
688
689 cq->resize_buf->cqe = entries - 1;
690
691 spin_lock_irq(&cq->lock);
692 cq->resize_buf->state = CQ_RESIZE_READY;
693 spin_unlock_irq(&cq->lock);
694
695 return 0;
696 }
697
mthca_resize_cq(struct ib_cq * ibcq,int entries,struct ib_udata * udata)698 static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
699 {
700 struct mthca_dev *dev = to_mdev(ibcq->device);
701 struct mthca_cq *cq = to_mcq(ibcq);
702 struct mthca_resize_cq ucmd;
703 u32 lkey;
704 int ret;
705
706 if (entries < 1 || entries > dev->limits.max_cqes)
707 return -EINVAL;
708
709 mutex_lock(&cq->mutex);
710
711 entries = roundup_pow_of_two(entries + 1);
712 if (entries == ibcq->cqe + 1) {
713 ret = 0;
714 goto out;
715 }
716
717 if (cq->is_kernel) {
718 ret = mthca_alloc_resize_buf(dev, cq, entries);
719 if (ret)
720 goto out;
721 lkey = cq->resize_buf->buf.mr.ibmr.lkey;
722 } else {
723 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
724 ret = -EFAULT;
725 goto out;
726 }
727 lkey = ucmd.lkey;
728 }
729
730 ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries));
731
732 if (ret) {
733 if (cq->resize_buf) {
734 mthca_free_cq_buf(dev, &cq->resize_buf->buf,
735 cq->resize_buf->cqe);
736 kfree(cq->resize_buf);
737 spin_lock_irq(&cq->lock);
738 cq->resize_buf = NULL;
739 spin_unlock_irq(&cq->lock);
740 }
741 goto out;
742 }
743
744 if (cq->is_kernel) {
745 struct mthca_cq_buf tbuf;
746 int tcqe;
747
748 spin_lock_irq(&cq->lock);
749 if (cq->resize_buf->state == CQ_RESIZE_READY) {
750 mthca_cq_resize_copy_cqes(cq);
751 tbuf = cq->buf;
752 tcqe = cq->ibcq.cqe;
753 cq->buf = cq->resize_buf->buf;
754 cq->ibcq.cqe = cq->resize_buf->cqe;
755 } else {
756 tbuf = cq->resize_buf->buf;
757 tcqe = cq->resize_buf->cqe;
758 }
759
760 kfree(cq->resize_buf);
761 cq->resize_buf = NULL;
762 spin_unlock_irq(&cq->lock);
763
764 mthca_free_cq_buf(dev, &tbuf, tcqe);
765 } else
766 ibcq->cqe = entries - 1;
767
768 out:
769 mutex_unlock(&cq->mutex);
770
771 return ret;
772 }
773
mthca_destroy_cq(struct ib_cq * cq,struct ib_udata * udata)774 static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
775 {
776 if (udata) {
777 struct mthca_ucontext *context =
778 rdma_udata_to_drv_context(
779 udata,
780 struct mthca_ucontext,
781 ibucontext);
782
783 mthca_unmap_user_db(to_mdev(cq->device),
784 &context->uar,
785 context->db_tab,
786 to_mcq(cq)->arm_db_index);
787 mthca_unmap_user_db(to_mdev(cq->device),
788 &context->uar,
789 context->db_tab,
790 to_mcq(cq)->set_ci_db_index);
791 }
792 mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
793 return 0;
794 }
795
convert_access(int acc)796 static inline u32 convert_access(int acc)
797 {
798 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC : 0) |
799 (acc & IB_ACCESS_REMOTE_WRITE ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
800 (acc & IB_ACCESS_REMOTE_READ ? MTHCA_MPT_FLAG_REMOTE_READ : 0) |
801 (acc & IB_ACCESS_LOCAL_WRITE ? MTHCA_MPT_FLAG_LOCAL_WRITE : 0) |
802 MTHCA_MPT_FLAG_LOCAL_READ;
803 }
804
mthca_get_dma_mr(struct ib_pd * pd,int acc)805 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
806 {
807 struct mthca_mr *mr;
808 int err;
809
810 mr = kmalloc_obj(*mr);
811 if (!mr)
812 return ERR_PTR(-ENOMEM);
813
814 err = mthca_mr_alloc_notrans(to_mdev(pd->device),
815 to_mpd(pd)->pd_num,
816 convert_access(acc), mr);
817
818 if (err) {
819 kfree(mr);
820 return ERR_PTR(err);
821 }
822
823 mr->umem = NULL;
824
825 return &mr->ibmr;
826 }
827
mthca_reg_user_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt,int acc,struct ib_dmah * dmah,struct ib_udata * udata)828 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
829 u64 virt, int acc, struct ib_dmah *dmah,
830 struct ib_udata *udata)
831 {
832 struct mthca_dev *dev = to_mdev(pd->device);
833 struct ib_block_iter biter;
834 struct mthca_ucontext *context = rdma_udata_to_drv_context(
835 udata, struct mthca_ucontext, ibucontext);
836 struct mthca_mr *mr;
837 struct mthca_reg_mr ucmd;
838 u64 *pages;
839 int n, i;
840 int err = 0;
841 int write_mtt_size;
842
843 if (dmah)
844 return ERR_PTR(-EOPNOTSUPP);
845
846 if (udata->inlen < sizeof ucmd) {
847 if (!context->reg_mr_warned) {
848 mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n",
849 current->comm);
850 mthca_warn(dev, " Update libmthca to fix this.\n");
851 }
852 ++context->reg_mr_warned;
853 ucmd.mr_attrs = 0;
854 } else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
855 return ERR_PTR(-EFAULT);
856
857 mr = kmalloc_obj(*mr);
858 if (!mr)
859 return ERR_PTR(-ENOMEM);
860
861 mr->umem = ib_umem_get(pd->device, start, length, acc);
862 if (IS_ERR(mr->umem)) {
863 err = PTR_ERR(mr->umem);
864 goto err;
865 }
866
867 n = ib_umem_num_dma_blocks(mr->umem, PAGE_SIZE);
868
869 mr->mtt = mthca_alloc_mtt(dev, n);
870 if (IS_ERR(mr->mtt)) {
871 err = PTR_ERR(mr->mtt);
872 goto err_umem;
873 }
874
875 pages = (u64 *) __get_free_page(GFP_KERNEL);
876 if (!pages) {
877 err = -ENOMEM;
878 goto err_mtt;
879 }
880
881 i = n = 0;
882
883 write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));
884
885 rdma_umem_for_each_dma_block(mr->umem, &biter, PAGE_SIZE) {
886 pages[i++] = rdma_block_iter_dma_address(&biter);
887
888 /*
889 * Be friendly to write_mtt and pass it chunks
890 * of appropriate size.
891 */
892 if (i == write_mtt_size) {
893 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
894 if (err)
895 goto mtt_done;
896 n += i;
897 i = 0;
898 }
899 }
900
901 if (i)
902 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
903 mtt_done:
904 free_page((unsigned long) pages);
905 if (err)
906 goto err_mtt;
907
908 err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, PAGE_SHIFT, virt, length,
909 convert_access(acc), mr);
910
911 if (err)
912 goto err_mtt;
913
914 return &mr->ibmr;
915
916 err_mtt:
917 mthca_free_mtt(dev, mr->mtt);
918
919 err_umem:
920 ib_umem_release(mr->umem);
921
922 err:
923 kfree(mr);
924 return ERR_PTR(err);
925 }
926
mthca_dereg_mr(struct ib_mr * mr,struct ib_udata * udata)927 static int mthca_dereg_mr(struct ib_mr *mr, struct ib_udata *udata)
928 {
929 struct mthca_mr *mmr = to_mmr(mr);
930
931 mthca_free_mr(to_mdev(mr->device), mmr);
932 ib_umem_release(mmr->umem);
933 kfree(mmr);
934
935 return 0;
936 }
937
hw_rev_show(struct device * device,struct device_attribute * attr,char * buf)938 static ssize_t hw_rev_show(struct device *device,
939 struct device_attribute *attr, char *buf)
940 {
941 struct mthca_dev *dev =
942 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
943
944 return sysfs_emit(buf, "%x\n", dev->rev_id);
945 }
946 static DEVICE_ATTR_RO(hw_rev);
947
hca_type_string(int hca_type)948 static const char *hca_type_string(int hca_type)
949 {
950 switch (hca_type) {
951 case PCI_DEVICE_ID_MELLANOX_TAVOR:
952 return "MT23108";
953 case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
954 return "MT25208 (MT23108 compat mode)";
955 case PCI_DEVICE_ID_MELLANOX_ARBEL:
956 return "MT25208";
957 case PCI_DEVICE_ID_MELLANOX_SINAI:
958 case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
959 return "MT25204";
960 }
961
962 return "unknown";
963 }
964
hca_type_show(struct device * device,struct device_attribute * attr,char * buf)965 static ssize_t hca_type_show(struct device *device,
966 struct device_attribute *attr, char *buf)
967 {
968 struct mthca_dev *dev =
969 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
970
971 return sysfs_emit(buf, "%s\n", hca_type_string(dev->pdev->device));
972 }
973 static DEVICE_ATTR_RO(hca_type);
974
board_id_show(struct device * device,struct device_attribute * attr,char * buf)975 static ssize_t board_id_show(struct device *device,
976 struct device_attribute *attr, char *buf)
977 {
978 struct mthca_dev *dev =
979 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
980
981 return sysfs_emit(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
982 }
983 static DEVICE_ATTR_RO(board_id);
984
985 static struct attribute *mthca_dev_attributes[] = {
986 &dev_attr_hw_rev.attr,
987 &dev_attr_hca_type.attr,
988 &dev_attr_board_id.attr,
989 NULL
990 };
991
992 static const struct attribute_group mthca_attr_group = {
993 .attrs = mthca_dev_attributes,
994 };
995
mthca_init_node_data(struct mthca_dev * dev)996 static int mthca_init_node_data(struct mthca_dev *dev)
997 {
998 struct ib_smp *in_mad;
999 struct ib_smp *out_mad;
1000 int err = -ENOMEM;
1001
1002 in_mad = kzalloc_obj(*in_mad);
1003 out_mad = kmalloc_obj(*out_mad);
1004 if (!in_mad || !out_mad)
1005 goto out;
1006
1007 ib_init_query_mad(in_mad);
1008 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
1009
1010 err = mthca_MAD_IFC(dev, 1, 1,
1011 1, NULL, NULL, in_mad, out_mad);
1012 if (err)
1013 goto out;
1014
1015 memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX);
1016
1017 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
1018
1019 err = mthca_MAD_IFC(dev, 1, 1,
1020 1, NULL, NULL, in_mad, out_mad);
1021 if (err)
1022 goto out;
1023
1024 if (mthca_is_memfree(dev))
1025 dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
1026 memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
1027
1028 out:
1029 kfree(in_mad);
1030 kfree(out_mad);
1031 return err;
1032 }
1033
mthca_port_immutable(struct ib_device * ibdev,u32 port_num,struct ib_port_immutable * immutable)1034 static int mthca_port_immutable(struct ib_device *ibdev, u32 port_num,
1035 struct ib_port_immutable *immutable)
1036 {
1037 struct ib_port_attr attr;
1038 int err;
1039
1040 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
1041
1042 err = ib_query_port(ibdev, port_num, &attr);
1043 if (err)
1044 return err;
1045
1046 immutable->pkey_tbl_len = attr.pkey_tbl_len;
1047 immutable->gid_tbl_len = attr.gid_tbl_len;
1048 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
1049
1050 return 0;
1051 }
1052
get_dev_fw_str(struct ib_device * device,char * str)1053 static void get_dev_fw_str(struct ib_device *device, char *str)
1054 {
1055 struct mthca_dev *dev =
1056 container_of(device, struct mthca_dev, ib_dev);
1057 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d",
1058 (int) (dev->fw_ver >> 32),
1059 (int) (dev->fw_ver >> 16) & 0xffff,
1060 (int) dev->fw_ver & 0xffff);
1061 }
1062
1063 static const struct ib_device_ops mthca_dev_ops = {
1064 .owner = THIS_MODULE,
1065 .driver_id = RDMA_DRIVER_MTHCA,
1066 .uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION,
1067 .uverbs_no_driver_id_binding = 1,
1068
1069 .alloc_pd = mthca_alloc_pd,
1070 .alloc_ucontext = mthca_alloc_ucontext,
1071 .attach_mcast = mthca_multicast_attach,
1072 .create_ah = mthca_ah_create,
1073 .create_cq = mthca_create_cq,
1074 .create_qp = mthca_create_qp,
1075 .dealloc_pd = mthca_dealloc_pd,
1076 .dealloc_ucontext = mthca_dealloc_ucontext,
1077 .dereg_mr = mthca_dereg_mr,
1078 .destroy_ah = mthca_ah_destroy,
1079 .destroy_cq = mthca_destroy_cq,
1080 .destroy_qp = mthca_destroy_qp,
1081 .detach_mcast = mthca_multicast_detach,
1082 .device_group = &mthca_attr_group,
1083 .get_dev_fw_str = get_dev_fw_str,
1084 .get_dma_mr = mthca_get_dma_mr,
1085 .get_port_immutable = mthca_port_immutable,
1086 .mmap = mthca_mmap_uar,
1087 .modify_device = mthca_modify_device,
1088 .modify_port = mthca_modify_port,
1089 .modify_qp = mthca_modify_qp,
1090 .poll_cq = mthca_poll_cq,
1091 .process_mad = mthca_process_mad,
1092 .query_ah = mthca_ah_query,
1093 .query_device = mthca_query_device,
1094 .query_gid = mthca_query_gid,
1095 .query_pkey = mthca_query_pkey,
1096 .query_port = mthca_query_port,
1097 .query_qp = mthca_query_qp,
1098 .reg_user_mr = mthca_reg_user_mr,
1099 .resize_cq = mthca_resize_cq,
1100
1101 INIT_RDMA_OBJ_SIZE(ib_ah, mthca_ah, ibah),
1102 INIT_RDMA_OBJ_SIZE(ib_cq, mthca_cq, ibcq),
1103 INIT_RDMA_OBJ_SIZE(ib_pd, mthca_pd, ibpd),
1104 INIT_RDMA_OBJ_SIZE(ib_qp, mthca_qp, ibqp),
1105 INIT_RDMA_OBJ_SIZE(ib_ucontext, mthca_ucontext, ibucontext),
1106 };
1107
1108 static const struct ib_device_ops mthca_dev_arbel_srq_ops = {
1109 .create_srq = mthca_create_srq,
1110 .destroy_srq = mthca_destroy_srq,
1111 .modify_srq = mthca_modify_srq,
1112 .post_srq_recv = mthca_arbel_post_srq_recv,
1113 .query_srq = mthca_query_srq,
1114
1115 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),
1116 };
1117
1118 static const struct ib_device_ops mthca_dev_tavor_srq_ops = {
1119 .create_srq = mthca_create_srq,
1120 .destroy_srq = mthca_destroy_srq,
1121 .modify_srq = mthca_modify_srq,
1122 .post_srq_recv = mthca_tavor_post_srq_recv,
1123 .query_srq = mthca_query_srq,
1124
1125 INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),
1126 };
1127
1128 static const struct ib_device_ops mthca_dev_arbel_ops = {
1129 .post_recv = mthca_arbel_post_receive,
1130 .post_send = mthca_arbel_post_send,
1131 .req_notify_cq = mthca_arbel_arm_cq,
1132 };
1133
1134 static const struct ib_device_ops mthca_dev_tavor_ops = {
1135 .post_recv = mthca_tavor_post_receive,
1136 .post_send = mthca_tavor_post_send,
1137 .req_notify_cq = mthca_tavor_arm_cq,
1138 };
1139
mthca_register_device(struct mthca_dev * dev)1140 int mthca_register_device(struct mthca_dev *dev)
1141 {
1142 int ret;
1143
1144 ret = mthca_init_node_data(dev);
1145 if (ret)
1146 return ret;
1147
1148 dev->ib_dev.node_type = RDMA_NODE_IB_CA;
1149 dev->ib_dev.phys_port_cnt = dev->limits.num_ports;
1150 dev->ib_dev.num_comp_vectors = 1;
1151 dev->ib_dev.dev.parent = &dev->pdev->dev;
1152
1153 if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1154 if (mthca_is_memfree(dev))
1155 ib_set_device_ops(&dev->ib_dev,
1156 &mthca_dev_arbel_srq_ops);
1157 else
1158 ib_set_device_ops(&dev->ib_dev,
1159 &mthca_dev_tavor_srq_ops);
1160 }
1161
1162 ib_set_device_ops(&dev->ib_dev, &mthca_dev_ops);
1163
1164 if (mthca_is_memfree(dev))
1165 ib_set_device_ops(&dev->ib_dev, &mthca_dev_arbel_ops);
1166 else
1167 ib_set_device_ops(&dev->ib_dev, &mthca_dev_tavor_ops);
1168
1169 mutex_init(&dev->cap_mask_mutex);
1170
1171 ret = ib_register_device(&dev->ib_dev, "mthca%d", &dev->pdev->dev);
1172 if (ret)
1173 return ret;
1174
1175 mthca_start_catas_poll(dev);
1176
1177 return 0;
1178 }
1179
mthca_unregister_device(struct mthca_dev * dev)1180 void mthca_unregister_device(struct mthca_dev *dev)
1181 {
1182 mthca_stop_catas_poll(dev);
1183 ib_unregister_device(&dev->ib_dev);
1184 }
1185