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 = NULL;
57 struct ib_smp *out_mad = NULL;
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
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 = NULL;
125 struct ib_smp *out_mad = NULL;
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
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 = NULL;
221 struct ib_smp *out_mad = NULL;
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
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 = NULL;
250 struct ib_smp *out_mad = NULL;
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
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 return -EFAULT;
432 }
433
434 return 0;
435 }
436
mthca_destroy_srq(struct ib_srq * srq,struct ib_udata * udata)437 static 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
mthca_create_qp(struct ib_qp * ibqp,struct ib_qp_init_attr * init_attr,struct ib_udata * udata)454 static 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
mthca_destroy_qp(struct ib_qp * qp,struct ib_udata * udata)552 static 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
mthca_create_cq(struct ib_cq * ibcq,const struct ib_cq_init_attr * attr,struct ib_udata * udata)575 static 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
638 err_unmap_arm:
639 if (udata)
640 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
641 context->db_tab, ucmd.arm_db_index);
642
643 err_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
mthca_alloc_resize_buf(struct mthca_dev * dev,struct mthca_cq * cq,int entries)651 static 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
672 unlock:
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
mthca_resize_cq(struct ib_cq * ibcq,int entries,struct ib_udata * udata)696 static 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
766 out:
767 mutex_unlock(&cq->mutex);
768
769 return ret;
770 }
771
mthca_destroy_cq(struct ib_cq * cq,struct ib_udata * udata)772 static 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
convert_access(int acc)794 static 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
mthca_get_dma_mr(struct ib_pd * pd,int acc)803 static 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
mthca_reg_user_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt,int acc,struct ib_udata * udata)826 static 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);
897 mtt_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
910 err_mtt:
911 mthca_free_mtt(dev, mr->mtt);
912
913 err_umem:
914 ib_umem_release(mr->umem);
915
916 err:
917 kfree(mr);
918 return ERR_PTR(err);
919 }
920
mthca_dereg_mr(struct ib_mr * mr,struct ib_udata * udata)921 static 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
hw_rev_show(struct device * device,struct device_attribute * attr,char * buf)932 static 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 }
940 static DEVICE_ATTR_RO(hw_rev);
941
hca_type_string(int hca_type)942 static 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
hca_type_show(struct device * device,struct device_attribute * attr,char * buf)959 static 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 }
967 static DEVICE_ATTR_RO(hca_type);
968
board_id_show(struct device * device,struct device_attribute * attr,char * buf)969 static 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 }
977 static DEVICE_ATTR_RO(board_id);
978
979 static 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
986 static const struct attribute_group mthca_attr_group = {
987 .attrs = mthca_dev_attributes,
988 };
989
mthca_init_node_data(struct mthca_dev * dev)990 static int mthca_init_node_data(struct mthca_dev *dev)
991 {
992 struct ib_smp *in_mad = NULL;
993 struct ib_smp *out_mad = NULL;
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
1022 out:
1023 kfree(in_mad);
1024 kfree(out_mad);
1025 return err;
1026 }
1027
mthca_port_immutable(struct ib_device * ibdev,u32 port_num,struct ib_port_immutable * immutable)1028 static 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
get_dev_fw_str(struct ib_device * device,char * str)1047 static 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
1057 static 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
1102 static 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
1112 static 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
1122 static 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
1128 static 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
mthca_register_device(struct mthca_dev * dev)1134 int 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
mthca_unregister_device(struct mthca_dev * dev)1174 void mthca_unregister_device(struct mthca_dev *dev)
1175 {
1176 mthca_stop_catas_poll(dev);
1177 ib_unregister_device(&dev->ib_dev);
1178 }
1179