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