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33#include <linux/module.h>
34#include <linux/init.h>
35#include <linux/slab.h>
36#include <linux/errno.h>
37
38#include <rdma/ib_user_verbs.h>
39#include <rdma/ib_addr.h>
40
41#include "usnic_abi.h"
42#include "usnic_ib.h"
43#include "usnic_common_util.h"
44#include "usnic_ib_qp_grp.h"
45#include "usnic_ib_verbs.h"
46#include "usnic_fwd.h"
47#include "usnic_log.h"
48#include "usnic_uiom.h"
49#include "usnic_transport.h"
50
51#define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM
52
53const struct usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = {
54 {
55 .resources = {
56 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
57 },
58 },
59 {
60 .resources = {
61 {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,},
62 {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,},
63 {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,},
64 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
65 },
66 },
67 {
68 .resources = {
69 {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,},
70 {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,},
71 {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,},
72 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
73 },
74 },
75};
76
77static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
78{
79 *fw_ver = *((u64 *)fw_ver_str);
80}
81
82static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp,
83 struct ib_udata *udata)
84{
85 struct usnic_ib_dev *us_ibdev;
86 struct usnic_ib_create_qp_resp resp;
87 struct pci_dev *pdev;
88 struct vnic_dev_bar *bar;
89 struct usnic_vnic_res_chunk *chunk;
90 struct usnic_ib_qp_grp_flow *default_flow;
91 int i, err;
92
93 memset(&resp, 0, sizeof(resp));
94
95 us_ibdev = qp_grp->vf->pf;
96 pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
97 if (!pdev) {
98 usnic_err("Failed to get pdev of qp_grp %d\n",
99 qp_grp->grp_id);
100 return -EFAULT;
101 }
102
103 bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0);
104 if (!bar) {
105 usnic_err("Failed to get bar0 of qp_grp %d vf %s",
106 qp_grp->grp_id, pci_name(pdev));
107 return -EFAULT;
108 }
109
110 resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic);
111 resp.bar_bus_addr = bar->bus_addr;
112 resp.bar_len = bar->len;
113
114 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
115 if (IS_ERR(chunk)) {
116 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
117 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
118 qp_grp->grp_id,
119 PTR_ERR(chunk));
120 return PTR_ERR(chunk);
121 }
122
123 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ);
124 resp.rq_cnt = chunk->cnt;
125 for (i = 0; i < chunk->cnt; i++)
126 resp.rq_idx[i] = chunk->res[i]->vnic_idx;
127
128 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ);
129 if (IS_ERR(chunk)) {
130 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
131 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ),
132 qp_grp->grp_id,
133 PTR_ERR(chunk));
134 return PTR_ERR(chunk);
135 }
136
137 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ);
138 resp.wq_cnt = chunk->cnt;
139 for (i = 0; i < chunk->cnt; i++)
140 resp.wq_idx[i] = chunk->res[i]->vnic_idx;
141
142 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ);
143 if (IS_ERR(chunk)) {
144 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
145 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ),
146 qp_grp->grp_id,
147 PTR_ERR(chunk));
148 return PTR_ERR(chunk);
149 }
150
151 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ);
152 resp.cq_cnt = chunk->cnt;
153 for (i = 0; i < chunk->cnt; i++)
154 resp.cq_idx[i] = chunk->res[i]->vnic_idx;
155
156 default_flow = list_first_entry(&qp_grp->flows_lst,
157 struct usnic_ib_qp_grp_flow, link);
158 resp.transport = default_flow->trans_type;
159
160 err = ib_copy_to_udata(udata, &resp, sizeof(resp));
161 if (err) {
162 usnic_err("Failed to copy udata for %s",
163 dev_name(&us_ibdev->ib_dev.dev));
164 return err;
165 }
166
167 return 0;
168}
169
170static struct usnic_ib_qp_grp*
171find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
172 struct usnic_ib_pd *pd,
173 struct usnic_transport_spec *trans_spec,
174 struct usnic_vnic_res_spec *res_spec)
175{
176 struct usnic_ib_vf *vf;
177 struct usnic_vnic *vnic;
178 struct usnic_ib_qp_grp *qp_grp;
179 struct device *dev, **dev_list;
180 int i;
181
182 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
183
184 if (list_empty(&us_ibdev->vf_dev_list)) {
185 usnic_info("No vfs to allocate\n");
186 return NULL;
187 }
188
189 if (usnic_ib_share_vf) {
190
191 dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
192 if (IS_ERR(dev_list))
193 return ERR_CAST(dev_list);
194 for (i = 0; dev_list[i]; i++) {
195 dev = dev_list[i];
196 vf = pci_get_drvdata(to_pci_dev(dev));
197 spin_lock(&vf->lock);
198 vnic = vf->vnic;
199 if (!usnic_vnic_check_room(vnic, res_spec)) {
200 usnic_dbg("Found used vnic %s from %s\n",
201 dev_name(&us_ibdev->ib_dev.dev),
202 pci_name(usnic_vnic_get_pdev(
203 vnic)));
204 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev,
205 vf, pd,
206 res_spec,
207 trans_spec);
208
209 spin_unlock(&vf->lock);
210 goto qp_grp_check;
211 }
212 spin_unlock(&vf->lock);
213
214 }
215 usnic_uiom_free_dev_list(dev_list);
216 }
217
218
219 list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
220 spin_lock(&vf->lock);
221 vnic = vf->vnic;
222 if (vf->qp_grp_ref_cnt == 0 &&
223 usnic_vnic_check_room(vnic, res_spec) == 0) {
224 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf,
225 pd, res_spec,
226 trans_spec);
227
228 spin_unlock(&vf->lock);
229 goto qp_grp_check;
230 }
231 spin_unlock(&vf->lock);
232 }
233
234 usnic_info("No free qp grp found on %s\n",
235 dev_name(&us_ibdev->ib_dev.dev));
236 return ERR_PTR(-ENOMEM);
237
238qp_grp_check:
239 if (IS_ERR_OR_NULL(qp_grp)) {
240 usnic_err("Failed to allocate qp_grp\n");
241 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
242 }
243 return qp_grp;
244}
245
246static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
247{
248 struct usnic_ib_vf *vf = qp_grp->vf;
249
250 WARN_ON(qp_grp->state != IB_QPS_RESET);
251
252 spin_lock(&vf->lock);
253 usnic_ib_qp_grp_destroy(qp_grp);
254 spin_unlock(&vf->lock);
255}
256
257static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
258{
259 if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
260 cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
261 return -EINVAL;
262
263 return 0;
264}
265
266
267
268enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
269 u8 port_num)
270{
271 return IB_LINK_LAYER_ETHERNET;
272}
273
274int usnic_ib_query_device(struct ib_device *ibdev,
275 struct ib_device_attr *props,
276 struct ib_udata *uhw)
277{
278 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
279 union ib_gid gid;
280 struct ethtool_drvinfo info;
281 int qp_per_vf;
282
283 usnic_dbg("\n");
284 if (uhw->inlen || uhw->outlen)
285 return -EINVAL;
286
287 mutex_lock(&us_ibdev->usdev_lock);
288 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
289 memset(props, 0, sizeof(*props));
290 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
291 &gid.raw[0]);
292 memcpy(&props->sys_image_guid, &gid.global.interface_id,
293 sizeof(gid.global.interface_id));
294 usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
295 props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
296 props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
297 props->vendor_id = PCI_VENDOR_ID_CISCO;
298 props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
299 props->hw_ver = us_ibdev->pdev->subsystem_device;
300 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
301 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
302 props->max_qp = qp_per_vf *
303 kref_read(&us_ibdev->vf_cnt);
304 props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
305 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
306 props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
307 kref_read(&us_ibdev->vf_cnt);
308 props->max_pd = USNIC_UIOM_MAX_PD_CNT;
309 props->max_mr = USNIC_UIOM_MAX_MR_CNT;
310 props->local_ca_ack_delay = 0;
311 props->max_pkeys = 0;
312 props->atomic_cap = IB_ATOMIC_NONE;
313 props->masked_atomic_cap = props->atomic_cap;
314 props->max_qp_rd_atom = 0;
315 props->max_qp_init_rd_atom = 0;
316 props->max_res_rd_atom = 0;
317 props->max_srq = 0;
318 props->max_srq_wr = 0;
319 props->max_srq_sge = 0;
320 props->max_fast_reg_page_list_len = 0;
321 props->max_mcast_grp = 0;
322 props->max_mcast_qp_attach = 0;
323 props->max_total_mcast_qp_attach = 0;
324 props->max_map_per_fmr = 0;
325
326
327 mutex_unlock(&us_ibdev->usdev_lock);
328
329 return 0;
330}
331
332int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
333 struct ib_port_attr *props)
334{
335 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
336
337 usnic_dbg("\n");
338
339 if (ib_get_eth_speed(ibdev, port, &props->active_speed,
340 &props->active_width))
341 return -EINVAL;
342
343
344
345
346
347
348 mutex_lock(&us_ibdev->usdev_lock);
349
350
351 props->lid = 0;
352 props->lmc = 1;
353 props->sm_lid = 0;
354 props->sm_sl = 0;
355
356 if (!us_ibdev->ufdev->link_up) {
357 props->state = IB_PORT_DOWN;
358 props->phys_state = 3;
359 } else if (!us_ibdev->ufdev->inaddr) {
360 props->state = IB_PORT_INIT;
361 props->phys_state = 4;
362 } else {
363 props->state = IB_PORT_ACTIVE;
364 props->phys_state = 5;
365 }
366
367 props->port_cap_flags = 0;
368 props->gid_tbl_len = 1;
369 props->pkey_tbl_len = 1;
370 props->bad_pkey_cntr = 0;
371 props->qkey_viol_cntr = 0;
372 props->max_mtu = IB_MTU_4096;
373 props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
374
375 props->max_msg_sz = us_ibdev->ufdev->mtu;
376 props->max_vl_num = 1;
377 mutex_unlock(&us_ibdev->usdev_lock);
378
379 return 0;
380}
381
382int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
383 int qp_attr_mask,
384 struct ib_qp_init_attr *qp_init_attr)
385{
386 struct usnic_ib_qp_grp *qp_grp;
387 struct usnic_ib_vf *vf;
388 int err;
389
390 usnic_dbg("\n");
391
392 memset(qp_attr, 0, sizeof(*qp_attr));
393 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
394
395 qp_grp = to_uqp_grp(qp);
396 vf = qp_grp->vf;
397 mutex_lock(&vf->pf->usdev_lock);
398 usnic_dbg("\n");
399 qp_attr->qp_state = qp_grp->state;
400 qp_attr->cur_qp_state = qp_grp->state;
401
402 switch (qp_grp->ibqp.qp_type) {
403 case IB_QPT_UD:
404 qp_attr->qkey = 0;
405 break;
406 default:
407 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
408 err = -EINVAL;
409 goto err_out;
410 }
411
412 mutex_unlock(&vf->pf->usdev_lock);
413 return 0;
414
415err_out:
416 mutex_unlock(&vf->pf->usdev_lock);
417 return err;
418}
419
420int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
421 union ib_gid *gid)
422{
423
424 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
425 usnic_dbg("\n");
426
427 if (index > 1)
428 return -EINVAL;
429
430 mutex_lock(&us_ibdev->usdev_lock);
431 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
432 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
433 &gid->raw[0]);
434 mutex_unlock(&us_ibdev->usdev_lock);
435
436 return 0;
437}
438
439struct net_device *usnic_get_netdev(struct ib_device *device, u8 port_num)
440{
441 struct usnic_ib_dev *us_ibdev = to_usdev(device);
442
443 if (us_ibdev->netdev)
444 dev_hold(us_ibdev->netdev);
445
446 return us_ibdev->netdev;
447}
448
449int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
450 u16 *pkey)
451{
452 if (index > 0)
453 return -EINVAL;
454
455 *pkey = 0xffff;
456 return 0;
457}
458
459struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
460 struct ib_ucontext *context,
461 struct ib_udata *udata)
462{
463 struct usnic_ib_pd *pd;
464 void *umem_pd;
465
466 usnic_dbg("\n");
467
468 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
469 if (!pd)
470 return ERR_PTR(-ENOMEM);
471
472 umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
473 if (IS_ERR_OR_NULL(umem_pd)) {
474 kfree(pd);
475 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
476 }
477
478 usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
479 pd, context, dev_name(&ibdev->dev));
480 return &pd->ibpd;
481}
482
483int usnic_ib_dealloc_pd(struct ib_pd *pd)
484{
485 usnic_info("freeing domain 0x%p\n", pd);
486
487 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
488 kfree(pd);
489 return 0;
490}
491
492struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
493 struct ib_qp_init_attr *init_attr,
494 struct ib_udata *udata)
495{
496 int err;
497 struct usnic_ib_dev *us_ibdev;
498 struct usnic_ib_qp_grp *qp_grp;
499 struct usnic_ib_ucontext *ucontext;
500 int cq_cnt;
501 struct usnic_vnic_res_spec res_spec;
502 struct usnic_ib_create_qp_cmd cmd;
503 struct usnic_transport_spec trans_spec;
504
505 usnic_dbg("\n");
506
507 ucontext = to_uucontext(pd->uobject->context);
508 us_ibdev = to_usdev(pd->device);
509
510 if (init_attr->create_flags)
511 return ERR_PTR(-EINVAL);
512
513 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
514 if (err) {
515 usnic_err("%s: cannot copy udata for create_qp\n",
516 dev_name(&us_ibdev->ib_dev.dev));
517 return ERR_PTR(-EINVAL);
518 }
519
520 err = create_qp_validate_user_data(cmd);
521 if (err) {
522 usnic_err("%s: Failed to validate user data\n",
523 dev_name(&us_ibdev->ib_dev.dev));
524 return ERR_PTR(-EINVAL);
525 }
526
527 if (init_attr->qp_type != IB_QPT_UD) {
528 usnic_err("%s asked to make a non-UD QP: %d\n",
529 dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type);
530 return ERR_PTR(-EINVAL);
531 }
532
533 trans_spec = cmd.spec;
534 mutex_lock(&us_ibdev->usdev_lock);
535 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
536 res_spec = min_transport_spec[trans_spec.trans_type];
537 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
538 qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
539 &trans_spec,
540 &res_spec);
541 if (IS_ERR_OR_NULL(qp_grp)) {
542 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
543 goto out_release_mutex;
544 }
545
546 err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
547 if (err) {
548 err = -EBUSY;
549 goto out_release_qp_grp;
550 }
551
552 qp_grp->ctx = ucontext;
553 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
554 usnic_ib_log_vf(qp_grp->vf);
555 mutex_unlock(&us_ibdev->usdev_lock);
556 return &qp_grp->ibqp;
557
558out_release_qp_grp:
559 qp_grp_destroy(qp_grp);
560out_release_mutex:
561 mutex_unlock(&us_ibdev->usdev_lock);
562 return ERR_PTR(err);
563}
564
565int usnic_ib_destroy_qp(struct ib_qp *qp)
566{
567 struct usnic_ib_qp_grp *qp_grp;
568 struct usnic_ib_vf *vf;
569
570 usnic_dbg("\n");
571
572 qp_grp = to_uqp_grp(qp);
573 vf = qp_grp->vf;
574 mutex_lock(&vf->pf->usdev_lock);
575 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
576 usnic_err("Failed to move qp grp %u to reset\n",
577 qp_grp->grp_id);
578 }
579
580 list_del(&qp_grp->link);
581 qp_grp_destroy(qp_grp);
582 mutex_unlock(&vf->pf->usdev_lock);
583
584 return 0;
585}
586
587int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
588 int attr_mask, struct ib_udata *udata)
589{
590 struct usnic_ib_qp_grp *qp_grp;
591 int status;
592 usnic_dbg("\n");
593
594 qp_grp = to_uqp_grp(ibqp);
595
596 mutex_lock(&qp_grp->vf->pf->usdev_lock);
597 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
598
599 status = -EINVAL;
600 goto out_unlock;
601 }
602 if (attr_mask & IB_QP_STATE) {
603 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
604 } else {
605 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
606 status = -EINVAL;
607 }
608
609out_unlock:
610 mutex_unlock(&qp_grp->vf->pf->usdev_lock);
611 return status;
612}
613
614struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev,
615 const struct ib_cq_init_attr *attr,
616 struct ib_ucontext *context,
617 struct ib_udata *udata)
618{
619 struct ib_cq *cq;
620
621 usnic_dbg("\n");
622 if (attr->flags)
623 return ERR_PTR(-EINVAL);
624
625 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
626 if (!cq)
627 return ERR_PTR(-EBUSY);
628
629 return cq;
630}
631
632int usnic_ib_destroy_cq(struct ib_cq *cq)
633{
634 usnic_dbg("\n");
635 kfree(cq);
636 return 0;
637}
638
639struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
640 u64 virt_addr, int access_flags,
641 struct ib_udata *udata)
642{
643 struct usnic_ib_mr *mr;
644 int err;
645
646 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
647 virt_addr, length);
648
649 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
650 if (!mr)
651 return ERR_PTR(-ENOMEM);
652
653 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
654 access_flags, 0);
655 if (IS_ERR_OR_NULL(mr->umem)) {
656 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
657 goto err_free;
658 }
659
660 mr->ibmr.lkey = mr->ibmr.rkey = 0;
661 return &mr->ibmr;
662
663err_free:
664 kfree(mr);
665 return ERR_PTR(err);
666}
667
668int usnic_ib_dereg_mr(struct ib_mr *ibmr)
669{
670 struct usnic_ib_mr *mr = to_umr(ibmr);
671
672 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
673
674 usnic_uiom_reg_release(mr->umem, ibmr->uobject->context);
675 kfree(mr);
676 return 0;
677}
678
679struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
680 struct ib_udata *udata)
681{
682 struct usnic_ib_ucontext *context;
683 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
684 usnic_dbg("\n");
685
686 context = kmalloc(sizeof(*context), GFP_KERNEL);
687 if (!context)
688 return ERR_PTR(-ENOMEM);
689
690 INIT_LIST_HEAD(&context->qp_grp_list);
691 mutex_lock(&us_ibdev->usdev_lock);
692 list_add_tail(&context->link, &us_ibdev->ctx_list);
693 mutex_unlock(&us_ibdev->usdev_lock);
694
695 return &context->ibucontext;
696}
697
698int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
699{
700 struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
701 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
702 usnic_dbg("\n");
703
704 mutex_lock(&us_ibdev->usdev_lock);
705 BUG_ON(!list_empty(&context->qp_grp_list));
706 list_del(&context->link);
707 mutex_unlock(&us_ibdev->usdev_lock);
708 kfree(context);
709 return 0;
710}
711
712int usnic_ib_mmap(struct ib_ucontext *context,
713 struct vm_area_struct *vma)
714{
715 struct usnic_ib_ucontext *uctx = to_ucontext(context);
716 struct usnic_ib_dev *us_ibdev;
717 struct usnic_ib_qp_grp *qp_grp;
718 struct usnic_ib_vf *vf;
719 struct vnic_dev_bar *bar;
720 dma_addr_t bus_addr;
721 unsigned int len;
722 unsigned int vfid;
723
724 usnic_dbg("\n");
725
726 us_ibdev = to_usdev(context->device);
727 vma->vm_flags |= VM_IO;
728 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
729 vfid = vma->vm_pgoff;
730 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
731 vma->vm_pgoff, PAGE_SHIFT, vfid);
732
733 mutex_lock(&us_ibdev->usdev_lock);
734 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
735 vf = qp_grp->vf;
736 if (usnic_vnic_get_index(vf->vnic) == vfid) {
737 bar = usnic_vnic_get_bar(vf->vnic, 0);
738 if ((vma->vm_end - vma->vm_start) != bar->len) {
739 usnic_err("Bar0 Len %lu - Request map %lu\n",
740 bar->len,
741 vma->vm_end - vma->vm_start);
742 mutex_unlock(&us_ibdev->usdev_lock);
743 return -EINVAL;
744 }
745 bus_addr = bar->bus_addr;
746 len = bar->len;
747 usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
748 &bus_addr, bar->vaddr, bar->len);
749 mutex_unlock(&us_ibdev->usdev_lock);
750
751 return remap_pfn_range(vma,
752 vma->vm_start,
753 bus_addr >> PAGE_SHIFT,
754 len, vma->vm_page_prot);
755 }
756 }
757
758 mutex_unlock(&us_ibdev->usdev_lock);
759 usnic_err("No VF %u found\n", vfid);
760 return -EINVAL;
761}
762
763
764struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
765 struct rdma_ah_attr *ah_attr,
766 u32 flags,
767 struct ib_udata *udata)
768
769{
770 usnic_dbg("\n");
771 return ERR_PTR(-EPERM);
772}
773
774int usnic_ib_destroy_ah(struct ib_ah *ah, u32 flags)
775{
776 usnic_dbg("\n");
777 return -EINVAL;
778}
779
780int usnic_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
781 const struct ib_send_wr **bad_wr)
782{
783 usnic_dbg("\n");
784 return -EINVAL;
785}
786
787int usnic_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
788 const struct ib_recv_wr **bad_wr)
789{
790 usnic_dbg("\n");
791 return -EINVAL;
792}
793
794int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
795 struct ib_wc *wc)
796{
797 usnic_dbg("\n");
798 return -EINVAL;
799}
800
801int usnic_ib_req_notify_cq(struct ib_cq *cq,
802 enum ib_cq_notify_flags flags)
803{
804 usnic_dbg("\n");
805 return -EINVAL;
806}
807
808struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc)
809{
810 usnic_dbg("\n");
811 return ERR_PTR(-ENOMEM);
812}
813
814
815
816
817
