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